Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Jeff Garzik | af36d7f | 2005-08-28 20:18:39 -0400 | [diff] [blame] | 2 | * libata-core.c - helper library for ATA |
| 3 | * |
| 4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> |
| 5 | * Please ALWAYS copy linux-ide@vger.kernel.org |
| 6 | * on emails. |
| 7 | * |
| 8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. |
| 9 | * Copyright 2003-2004 Jeff Garzik |
| 10 | * |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2, or (at your option) |
| 15 | * any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; see the file COPYING. If not, write to |
| 24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | * |
| 26 | * |
| 27 | * libata documentation is available via 'make {ps|pdf}docs', |
| 28 | * as Documentation/DocBook/libata.* |
| 29 | * |
| 30 | * Hardware documentation available from http://www.t13.org/ and |
| 31 | * http://www.sata-io.org/ |
| 32 | * |
Alan Cox | 92c52c5 | 2007-11-19 14:30:16 +0000 | [diff] [blame] | 33 | * Standards documents from: |
| 34 | * http://www.t13.org (ATA standards, PCI DMA IDE spec) |
| 35 | * http://www.t10.org (SCSI MMC - for ATAPI MMC) |
| 36 | * http://www.sata-io.org (SATA) |
| 37 | * http://www.compactflash.org (CF) |
| 38 | * http://www.qic.org (QIC157 - Tape and DSC) |
| 39 | * http://www.ce-ata.org (CE-ATA: not supported) |
| 40 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | */ |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/kernel.h> |
| 44 | #include <linux/module.h> |
| 45 | #include <linux/pci.h> |
| 46 | #include <linux/init.h> |
| 47 | #include <linux/list.h> |
| 48 | #include <linux/mm.h> |
| 49 | #include <linux/highmem.h> |
| 50 | #include <linux/spinlock.h> |
| 51 | #include <linux/blkdev.h> |
| 52 | #include <linux/delay.h> |
| 53 | #include <linux/timer.h> |
| 54 | #include <linux/interrupt.h> |
| 55 | #include <linux/completion.h> |
| 56 | #include <linux/suspend.h> |
| 57 | #include <linux/workqueue.h> |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 58 | #include <linux/jiffies.h> |
David Hardeman | 378f058 | 2005-09-17 17:55:31 +1000 | [diff] [blame] | 59 | #include <linux/scatterlist.h> |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 60 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <scsi/scsi.h> |
Jeff Garzik | 193515d | 2005-11-07 00:59:37 -0500 | [diff] [blame] | 62 | #include <scsi/scsi_cmnd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #include <scsi/scsi_host.h> |
| 64 | #include <linux/libata.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #include <asm/semaphore.h> |
| 66 | #include <asm/byteorder.h> |
Tejun Heo | 140b5e5 | 2007-12-12 12:21:52 +0900 | [diff] [blame] | 67 | #include <linux/cdrom.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
| 69 | #include "libata.h" |
| 70 | |
Jeff Garzik | fda0efc | 2007-01-31 07:43:15 -0500 | [diff] [blame] | 71 | |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 72 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
Tejun Heo | e9c8391 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 73 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
| 74 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; |
| 75 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 76 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 77 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
| 78 | u16 heads, u16 sectors); |
| 79 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); |
Jeff Garzik | 218f3d3 | 2007-10-25 00:33:27 -0400 | [diff] [blame] | 80 | static unsigned int ata_dev_set_feature(struct ata_device *dev, |
| 81 | u8 enable, u8 feature); |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 82 | static void ata_dev_xfermask(struct ata_device *dev); |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 83 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 85 | unsigned int ata_print_id = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | static struct workqueue_struct *ata_wq; |
| 87 | |
Tejun Heo | 453b07a | 2006-05-31 18:27:42 +0900 | [diff] [blame] | 88 | struct workqueue_struct *ata_aux_wq; |
| 89 | |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 90 | struct ata_force_param { |
| 91 | const char *name; |
| 92 | unsigned int cbl; |
| 93 | int spd_limit; |
| 94 | unsigned long xfer_mask; |
| 95 | unsigned int horkage_on; |
| 96 | unsigned int horkage_off; |
| 97 | }; |
| 98 | |
| 99 | struct ata_force_ent { |
| 100 | int port; |
| 101 | int device; |
| 102 | struct ata_force_param param; |
| 103 | }; |
| 104 | |
| 105 | static struct ata_force_ent *ata_force_tbl; |
| 106 | static int ata_force_tbl_size; |
| 107 | |
| 108 | static char ata_force_param_buf[PAGE_SIZE] __initdata; |
Tejun Heo | 7afb422 | 2008-03-09 20:21:53 +0900 | [diff] [blame] | 109 | /* param_buf is thrown away after initialization, disallow read */ |
| 110 | module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 111 | MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); |
| 112 | |
Jeff Garzik | 418dc1f | 2006-03-11 20:50:08 -0500 | [diff] [blame] | 113 | int atapi_enabled = 1; |
Jeff Garzik | 1623c81 | 2005-08-30 03:37:42 -0400 | [diff] [blame] | 114 | module_param(atapi_enabled, int, 0444); |
| 115 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); |
| 116 | |
Adrian Bunk | c5c61bd | 2008-02-25 02:07:25 +0200 | [diff] [blame] | 117 | static int atapi_dmadir = 0; |
Albert Lee | 95de719 | 2006-04-04 10:57:18 +0800 | [diff] [blame] | 118 | module_param(atapi_dmadir, int, 0444); |
| 119 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); |
| 120 | |
Mark Lord | baf4fdf | 2007-08-08 01:08:45 +0900 | [diff] [blame] | 121 | int atapi_passthru16 = 1; |
| 122 | module_param(atapi_passthru16, int, 0444); |
| 123 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); |
| 124 | |
Jeff Garzik | c3c013a | 2006-02-27 22:31:19 -0500 | [diff] [blame] | 125 | int libata_fua = 0; |
| 126 | module_param_named(fua, libata_fua, int, 0444); |
| 127 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); |
| 128 | |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 129 | static int ata_ignore_hpa; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 130 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
| 131 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); |
| 132 | |
Alan Cox | b3a7060 | 2007-10-02 12:38:26 -0400 | [diff] [blame] | 133 | static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
| 134 | module_param_named(dma, libata_dma_mask, int, 0444); |
| 135 | MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); |
| 136 | |
Andrew Morton | a8601e5 | 2006-06-25 01:36:52 -0700 | [diff] [blame] | 137 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
| 138 | module_param(ata_probe_timeout, int, 0444); |
| 139 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); |
| 140 | |
Jeff Garzik | 6ebe9d8 | 2007-10-05 16:28:36 -0400 | [diff] [blame] | 141 | int libata_noacpi = 0; |
Jeff Garzik | d7d0dad | 2007-03-28 01:57:37 -0400 | [diff] [blame] | 142 | module_param_named(noacpi, libata_noacpi, int, 0444); |
Jeff Garzik | 6ebe9d8 | 2007-10-05 16:28:36 -0400 | [diff] [blame] | 143 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set"); |
Kristen Carlson Accardi | 11ef697 | 2006-09-28 11:29:01 -0700 | [diff] [blame] | 144 | |
Alan Cox | ae8d4ee | 2007-11-04 22:05:49 -0500 | [diff] [blame] | 145 | int libata_allow_tpm = 0; |
| 146 | module_param_named(allow_tpm, libata_allow_tpm, int, 0444); |
| 147 | MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands"); |
| 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | MODULE_AUTHOR("Jeff Garzik"); |
| 150 | MODULE_DESCRIPTION("Library module for ATA devices"); |
| 151 | MODULE_LICENSE("GPL"); |
| 152 | MODULE_VERSION(DRV_VERSION); |
| 153 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 154 | |
| 155 | /** |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 156 | * ata_force_cbl - force cable type according to libata.force |
Randy Dunlap | 4cdfa1b | 2008-02-22 12:21:37 -0800 | [diff] [blame] | 157 | * @ap: ATA port of interest |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 158 | * |
| 159 | * Force cable type according to libata.force and whine about it. |
| 160 | * The last entry which has matching port number is used, so it |
| 161 | * can be specified as part of device force parameters. For |
| 162 | * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the |
| 163 | * same effect. |
| 164 | * |
| 165 | * LOCKING: |
| 166 | * EH context. |
| 167 | */ |
| 168 | void ata_force_cbl(struct ata_port *ap) |
| 169 | { |
| 170 | int i; |
| 171 | |
| 172 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
| 173 | const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| 174 | |
| 175 | if (fe->port != -1 && fe->port != ap->print_id) |
| 176 | continue; |
| 177 | |
| 178 | if (fe->param.cbl == ATA_CBL_NONE) |
| 179 | continue; |
| 180 | |
| 181 | ap->cbl = fe->param.cbl; |
| 182 | ata_port_printk(ap, KERN_NOTICE, |
| 183 | "FORCE: cable set to %s\n", fe->param.name); |
| 184 | return; |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * ata_force_spd_limit - force SATA spd limit according to libata.force |
| 190 | * @link: ATA link of interest |
| 191 | * |
| 192 | * Force SATA spd limit according to libata.force and whine about |
| 193 | * it. When only the port part is specified (e.g. 1:), the limit |
| 194 | * applies to all links connected to both the host link and all |
| 195 | * fan-out ports connected via PMP. If the device part is |
| 196 | * specified as 0 (e.g. 1.00:), it specifies the first fan-out |
| 197 | * link not the host link. Device number 15 always points to the |
| 198 | * host link whether PMP is attached or not. |
| 199 | * |
| 200 | * LOCKING: |
| 201 | * EH context. |
| 202 | */ |
| 203 | static void ata_force_spd_limit(struct ata_link *link) |
| 204 | { |
| 205 | int linkno, i; |
| 206 | |
| 207 | if (ata_is_host_link(link)) |
| 208 | linkno = 15; |
| 209 | else |
| 210 | linkno = link->pmp; |
| 211 | |
| 212 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
| 213 | const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| 214 | |
| 215 | if (fe->port != -1 && fe->port != link->ap->print_id) |
| 216 | continue; |
| 217 | |
| 218 | if (fe->device != -1 && fe->device != linkno) |
| 219 | continue; |
| 220 | |
| 221 | if (!fe->param.spd_limit) |
| 222 | continue; |
| 223 | |
| 224 | link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; |
| 225 | ata_link_printk(link, KERN_NOTICE, |
| 226 | "FORCE: PHY spd limit set to %s\n", fe->param.name); |
| 227 | return; |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * ata_force_xfermask - force xfermask according to libata.force |
| 233 | * @dev: ATA device of interest |
| 234 | * |
| 235 | * Force xfer_mask according to libata.force and whine about it. |
| 236 | * For consistency with link selection, device number 15 selects |
| 237 | * the first device connected to the host link. |
| 238 | * |
| 239 | * LOCKING: |
| 240 | * EH context. |
| 241 | */ |
| 242 | static void ata_force_xfermask(struct ata_device *dev) |
| 243 | { |
| 244 | int devno = dev->link->pmp + dev->devno; |
| 245 | int alt_devno = devno; |
| 246 | int i; |
| 247 | |
| 248 | /* allow n.15 for the first device attached to host port */ |
| 249 | if (ata_is_host_link(dev->link) && devno == 0) |
| 250 | alt_devno = 15; |
| 251 | |
| 252 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
| 253 | const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| 254 | unsigned long pio_mask, mwdma_mask, udma_mask; |
| 255 | |
| 256 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) |
| 257 | continue; |
| 258 | |
| 259 | if (fe->device != -1 && fe->device != devno && |
| 260 | fe->device != alt_devno) |
| 261 | continue; |
| 262 | |
| 263 | if (!fe->param.xfer_mask) |
| 264 | continue; |
| 265 | |
| 266 | ata_unpack_xfermask(fe->param.xfer_mask, |
| 267 | &pio_mask, &mwdma_mask, &udma_mask); |
| 268 | if (udma_mask) |
| 269 | dev->udma_mask = udma_mask; |
| 270 | else if (mwdma_mask) { |
| 271 | dev->udma_mask = 0; |
| 272 | dev->mwdma_mask = mwdma_mask; |
| 273 | } else { |
| 274 | dev->udma_mask = 0; |
| 275 | dev->mwdma_mask = 0; |
| 276 | dev->pio_mask = pio_mask; |
| 277 | } |
| 278 | |
| 279 | ata_dev_printk(dev, KERN_NOTICE, |
| 280 | "FORCE: xfer_mask set to %s\n", fe->param.name); |
| 281 | return; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * ata_force_horkage - force horkage according to libata.force |
| 287 | * @dev: ATA device of interest |
| 288 | * |
| 289 | * Force horkage according to libata.force and whine about it. |
| 290 | * For consistency with link selection, device number 15 selects |
| 291 | * the first device connected to the host link. |
| 292 | * |
| 293 | * LOCKING: |
| 294 | * EH context. |
| 295 | */ |
| 296 | static void ata_force_horkage(struct ata_device *dev) |
| 297 | { |
| 298 | int devno = dev->link->pmp + dev->devno; |
| 299 | int alt_devno = devno; |
| 300 | int i; |
| 301 | |
| 302 | /* allow n.15 for the first device attached to host port */ |
| 303 | if (ata_is_host_link(dev->link) && devno == 0) |
| 304 | alt_devno = 15; |
| 305 | |
| 306 | for (i = 0; i < ata_force_tbl_size; i++) { |
| 307 | const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| 308 | |
| 309 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) |
| 310 | continue; |
| 311 | |
| 312 | if (fe->device != -1 && fe->device != devno && |
| 313 | fe->device != alt_devno) |
| 314 | continue; |
| 315 | |
| 316 | if (!(~dev->horkage & fe->param.horkage_on) && |
| 317 | !(dev->horkage & fe->param.horkage_off)) |
| 318 | continue; |
| 319 | |
| 320 | dev->horkage |= fe->param.horkage_on; |
| 321 | dev->horkage &= ~fe->param.horkage_off; |
| 322 | |
| 323 | ata_dev_printk(dev, KERN_NOTICE, |
| 324 | "FORCE: horkage modified (%s)\n", fe->param.name); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure |
| 330 | * @tf: Taskfile to convert |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | * @pmp: Port multiplier port |
Tejun Heo | 9977126 | 2007-07-16 14:29:38 +0900 | [diff] [blame] | 332 | * @is_cmd: This FIS is for command |
| 333 | * @fis: Buffer into which data will output |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | * |
| 335 | * Converts a standard ATA taskfile to a Serial ATA |
| 336 | * FIS structure (Register - Host to Device). |
| 337 | * |
| 338 | * LOCKING: |
| 339 | * Inherited from caller. |
| 340 | */ |
Tejun Heo | 9977126 | 2007-07-16 14:29:38 +0900 | [diff] [blame] | 341 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | { |
Tejun Heo | 9977126 | 2007-07-16 14:29:38 +0900 | [diff] [blame] | 343 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
| 344 | fis[1] = pmp & 0xf; /* Port multiplier number*/ |
| 345 | if (is_cmd) |
| 346 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ |
| 347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | fis[2] = tf->command; |
| 349 | fis[3] = tf->feature; |
| 350 | |
| 351 | fis[4] = tf->lbal; |
| 352 | fis[5] = tf->lbam; |
| 353 | fis[6] = tf->lbah; |
| 354 | fis[7] = tf->device; |
| 355 | |
| 356 | fis[8] = tf->hob_lbal; |
| 357 | fis[9] = tf->hob_lbam; |
| 358 | fis[10] = tf->hob_lbah; |
| 359 | fis[11] = tf->hob_feature; |
| 360 | |
| 361 | fis[12] = tf->nsect; |
| 362 | fis[13] = tf->hob_nsect; |
| 363 | fis[14] = 0; |
| 364 | fis[15] = tf->ctl; |
| 365 | |
| 366 | fis[16] = 0; |
| 367 | fis[17] = 0; |
| 368 | fis[18] = 0; |
| 369 | fis[19] = 0; |
| 370 | } |
| 371 | |
| 372 | /** |
| 373 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile |
| 374 | * @fis: Buffer from which data will be input |
| 375 | * @tf: Taskfile to output |
| 376 | * |
Mark Lord | e12a1be | 2005-11-12 18:55:45 -0500 | [diff] [blame] | 377 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | * |
| 379 | * LOCKING: |
| 380 | * Inherited from caller. |
| 381 | */ |
| 382 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 383 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
| 385 | tf->command = fis[2]; /* status */ |
| 386 | tf->feature = fis[3]; /* error */ |
| 387 | |
| 388 | tf->lbal = fis[4]; |
| 389 | tf->lbam = fis[5]; |
| 390 | tf->lbah = fis[6]; |
| 391 | tf->device = fis[7]; |
| 392 | |
| 393 | tf->hob_lbal = fis[8]; |
| 394 | tf->hob_lbam = fis[9]; |
| 395 | tf->hob_lbah = fis[10]; |
| 396 | |
| 397 | tf->nsect = fis[12]; |
| 398 | tf->hob_nsect = fis[13]; |
| 399 | } |
| 400 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 401 | static const u8 ata_rw_cmds[] = { |
| 402 | /* pio multi */ |
| 403 | ATA_CMD_READ_MULTI, |
| 404 | ATA_CMD_WRITE_MULTI, |
| 405 | ATA_CMD_READ_MULTI_EXT, |
| 406 | ATA_CMD_WRITE_MULTI_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 407 | 0, |
| 408 | 0, |
| 409 | 0, |
| 410 | ATA_CMD_WRITE_MULTI_FUA_EXT, |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 411 | /* pio */ |
| 412 | ATA_CMD_PIO_READ, |
| 413 | ATA_CMD_PIO_WRITE, |
| 414 | ATA_CMD_PIO_READ_EXT, |
| 415 | ATA_CMD_PIO_WRITE_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 416 | 0, |
| 417 | 0, |
| 418 | 0, |
| 419 | 0, |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 420 | /* dma */ |
| 421 | ATA_CMD_READ, |
| 422 | ATA_CMD_WRITE, |
| 423 | ATA_CMD_READ_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 424 | ATA_CMD_WRITE_EXT, |
| 425 | 0, |
| 426 | 0, |
| 427 | 0, |
| 428 | ATA_CMD_WRITE_FUA_EXT |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 429 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
| 431 | /** |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 432 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 433 | * @tf: command to examine and configure |
| 434 | * @dev: device tf belongs to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | * |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 436 | * Examine the device configuration and tf->flags to calculate |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 437 | * the proper read/write commands and protocol to use. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | * |
| 439 | * LOCKING: |
| 440 | * caller. |
| 441 | */ |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 442 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | { |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 444 | u8 cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 446 | int index, fua, lba48, write; |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 447 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 448 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 449 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
| 450 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 452 | if (dev->flags & ATA_DFLAG_PIO) { |
| 453 | tf->protocol = ATA_PROT_PIO; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 454 | index = dev->multi_count ? 0 : 8; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 455 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
Alan Cox | 8d238e0 | 2006-01-17 20:50:31 +0000 | [diff] [blame] | 456 | /* Unable to use DMA due to host limitation */ |
| 457 | tf->protocol = ATA_PROT_PIO; |
Albert Lee | 0565c26 | 2006-02-13 18:55:25 +0800 | [diff] [blame] | 458 | index = dev->multi_count ? 0 : 8; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 459 | } else { |
| 460 | tf->protocol = ATA_PROT_DMA; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 461 | index = 16; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 462 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 464 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
| 465 | if (cmd) { |
| 466 | tf->command = cmd; |
| 467 | return 0; |
| 468 | } |
| 469 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | } |
| 471 | |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 472 | /** |
Tejun Heo | 35b649f | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 473 | * ata_tf_read_block - Read block address from ATA taskfile |
| 474 | * @tf: ATA taskfile of interest |
| 475 | * @dev: ATA device @tf belongs to |
| 476 | * |
| 477 | * LOCKING: |
| 478 | * None. |
| 479 | * |
| 480 | * Read block address from @tf. This function can handle all |
| 481 | * three address formats - LBA, LBA48 and CHS. tf->protocol and |
| 482 | * flags select the address format to use. |
| 483 | * |
| 484 | * RETURNS: |
| 485 | * Block address read from @tf. |
| 486 | */ |
| 487 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) |
| 488 | { |
| 489 | u64 block = 0; |
| 490 | |
| 491 | if (tf->flags & ATA_TFLAG_LBA) { |
| 492 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 493 | block |= (u64)tf->hob_lbah << 40; |
| 494 | block |= (u64)tf->hob_lbam << 32; |
| 495 | block |= tf->hob_lbal << 24; |
| 496 | } else |
| 497 | block |= (tf->device & 0xf) << 24; |
| 498 | |
| 499 | block |= tf->lbah << 16; |
| 500 | block |= tf->lbam << 8; |
| 501 | block |= tf->lbal; |
| 502 | } else { |
| 503 | u32 cyl, head, sect; |
| 504 | |
| 505 | cyl = tf->lbam | (tf->lbah << 8); |
| 506 | head = tf->device & 0xf; |
| 507 | sect = tf->lbal; |
| 508 | |
| 509 | block = (cyl * dev->heads + head) * dev->sectors + sect; |
| 510 | } |
| 511 | |
| 512 | return block; |
| 513 | } |
| 514 | |
| 515 | /** |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 516 | * ata_build_rw_tf - Build ATA taskfile for given read/write request |
| 517 | * @tf: Target ATA taskfile |
| 518 | * @dev: ATA device @tf belongs to |
| 519 | * @block: Block address |
| 520 | * @n_block: Number of blocks |
| 521 | * @tf_flags: RW/FUA etc... |
| 522 | * @tag: tag |
| 523 | * |
| 524 | * LOCKING: |
| 525 | * None. |
| 526 | * |
| 527 | * Build ATA taskfile @tf for read/write request described by |
| 528 | * @block, @n_block, @tf_flags and @tag on @dev. |
| 529 | * |
| 530 | * RETURNS: |
| 531 | * |
| 532 | * 0 on success, -ERANGE if the request is too large for @dev, |
| 533 | * -EINVAL if the request is invalid. |
| 534 | */ |
| 535 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, |
| 536 | u64 block, u32 n_block, unsigned int tf_flags, |
| 537 | unsigned int tag) |
| 538 | { |
| 539 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 540 | tf->flags |= tf_flags; |
| 541 | |
Tejun Heo | 6d1245b | 2007-02-20 23:20:27 +0900 | [diff] [blame] | 542 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 543 | /* yay, NCQ */ |
| 544 | if (!lba_48_ok(block, n_block)) |
| 545 | return -ERANGE; |
| 546 | |
| 547 | tf->protocol = ATA_PROT_NCQ; |
| 548 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
| 549 | |
| 550 | if (tf->flags & ATA_TFLAG_WRITE) |
| 551 | tf->command = ATA_CMD_FPDMA_WRITE; |
| 552 | else |
| 553 | tf->command = ATA_CMD_FPDMA_READ; |
| 554 | |
| 555 | tf->nsect = tag << 3; |
| 556 | tf->hob_feature = (n_block >> 8) & 0xff; |
| 557 | tf->feature = n_block & 0xff; |
| 558 | |
| 559 | tf->hob_lbah = (block >> 40) & 0xff; |
| 560 | tf->hob_lbam = (block >> 32) & 0xff; |
| 561 | tf->hob_lbal = (block >> 24) & 0xff; |
| 562 | tf->lbah = (block >> 16) & 0xff; |
| 563 | tf->lbam = (block >> 8) & 0xff; |
| 564 | tf->lbal = block & 0xff; |
| 565 | |
| 566 | tf->device = 1 << 6; |
| 567 | if (tf->flags & ATA_TFLAG_FUA) |
| 568 | tf->device |= 1 << 7; |
| 569 | } else if (dev->flags & ATA_DFLAG_LBA) { |
| 570 | tf->flags |= ATA_TFLAG_LBA; |
| 571 | |
| 572 | if (lba_28_ok(block, n_block)) { |
| 573 | /* use LBA28 */ |
| 574 | tf->device |= (block >> 24) & 0xf; |
| 575 | } else if (lba_48_ok(block, n_block)) { |
| 576 | if (!(dev->flags & ATA_DFLAG_LBA48)) |
| 577 | return -ERANGE; |
| 578 | |
| 579 | /* use LBA48 */ |
| 580 | tf->flags |= ATA_TFLAG_LBA48; |
| 581 | |
| 582 | tf->hob_nsect = (n_block >> 8) & 0xff; |
| 583 | |
| 584 | tf->hob_lbah = (block >> 40) & 0xff; |
| 585 | tf->hob_lbam = (block >> 32) & 0xff; |
| 586 | tf->hob_lbal = (block >> 24) & 0xff; |
| 587 | } else |
| 588 | /* request too large even for LBA48 */ |
| 589 | return -ERANGE; |
| 590 | |
| 591 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) |
| 592 | return -EINVAL; |
| 593 | |
| 594 | tf->nsect = n_block & 0xff; |
| 595 | |
| 596 | tf->lbah = (block >> 16) & 0xff; |
| 597 | tf->lbam = (block >> 8) & 0xff; |
| 598 | tf->lbal = block & 0xff; |
| 599 | |
| 600 | tf->device |= ATA_LBA; |
| 601 | } else { |
| 602 | /* CHS */ |
| 603 | u32 sect, head, cyl, track; |
| 604 | |
| 605 | /* The request -may- be too large for CHS addressing. */ |
| 606 | if (!lba_28_ok(block, n_block)) |
| 607 | return -ERANGE; |
| 608 | |
| 609 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) |
| 610 | return -EINVAL; |
| 611 | |
| 612 | /* Convert LBA to CHS */ |
| 613 | track = (u32)block / dev->sectors; |
| 614 | cyl = track / dev->heads; |
| 615 | head = track % dev->heads; |
| 616 | sect = (u32)block % dev->sectors + 1; |
| 617 | |
| 618 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
| 619 | (u32)block, track, cyl, head, sect); |
| 620 | |
| 621 | /* Check whether the converted CHS can fit. |
| 622 | Cylinder: 0-65535 |
| 623 | Head: 0-15 |
| 624 | Sector: 1-255*/ |
| 625 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
| 626 | return -ERANGE; |
| 627 | |
| 628 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ |
| 629 | tf->lbal = sect; |
| 630 | tf->lbam = cyl; |
| 631 | tf->lbah = cyl >> 8; |
| 632 | tf->device |= head; |
| 633 | } |
| 634 | |
| 635 | return 0; |
| 636 | } |
| 637 | |
| 638 | /** |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 639 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask |
| 640 | * @pio_mask: pio_mask |
| 641 | * @mwdma_mask: mwdma_mask |
| 642 | * @udma_mask: udma_mask |
| 643 | * |
| 644 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single |
| 645 | * unsigned int xfer_mask. |
| 646 | * |
| 647 | * LOCKING: |
| 648 | * None. |
| 649 | * |
| 650 | * RETURNS: |
| 651 | * Packed xfer_mask. |
| 652 | */ |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 653 | unsigned long ata_pack_xfermask(unsigned long pio_mask, |
| 654 | unsigned long mwdma_mask, |
| 655 | unsigned long udma_mask) |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 656 | { |
| 657 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | |
| 658 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | |
| 659 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); |
| 660 | } |
| 661 | |
Tejun Heo | c0489e4 | 2006-03-24 14:07:49 +0900 | [diff] [blame] | 662 | /** |
| 663 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks |
| 664 | * @xfer_mask: xfer_mask to unpack |
| 665 | * @pio_mask: resulting pio_mask |
| 666 | * @mwdma_mask: resulting mwdma_mask |
| 667 | * @udma_mask: resulting udma_mask |
| 668 | * |
| 669 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. |
| 670 | * Any NULL distination masks will be ignored. |
| 671 | */ |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 672 | void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, |
| 673 | unsigned long *mwdma_mask, unsigned long *udma_mask) |
Tejun Heo | c0489e4 | 2006-03-24 14:07:49 +0900 | [diff] [blame] | 674 | { |
| 675 | if (pio_mask) |
| 676 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; |
| 677 | if (mwdma_mask) |
| 678 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; |
| 679 | if (udma_mask) |
| 680 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; |
| 681 | } |
| 682 | |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 683 | static const struct ata_xfer_ent { |
Tejun Heo | be9a50c | 2006-03-31 22:48:52 +0900 | [diff] [blame] | 684 | int shift, bits; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 685 | u8 base; |
| 686 | } ata_xfer_tbl[] = { |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 687 | { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, |
| 688 | { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, |
| 689 | { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 690 | { -1, }, |
| 691 | }; |
| 692 | |
| 693 | /** |
| 694 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask |
| 695 | * @xfer_mask: xfer_mask of interest |
| 696 | * |
| 697 | * Return matching XFER_* value for @xfer_mask. Only the highest |
| 698 | * bit of @xfer_mask is considered. |
| 699 | * |
| 700 | * LOCKING: |
| 701 | * None. |
| 702 | * |
| 703 | * RETURNS: |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 704 | * Matching XFER_* value, 0xff if no match found. |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 705 | */ |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 706 | u8 ata_xfer_mask2mode(unsigned long xfer_mask) |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 707 | { |
| 708 | int highbit = fls(xfer_mask) - 1; |
| 709 | const struct ata_xfer_ent *ent; |
| 710 | |
| 711 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| 712 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) |
| 713 | return ent->base + highbit - ent->shift; |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 714 | return 0xff; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 715 | } |
| 716 | |
| 717 | /** |
| 718 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* |
| 719 | * @xfer_mode: XFER_* of interest |
| 720 | * |
| 721 | * Return matching xfer_mask for @xfer_mode. |
| 722 | * |
| 723 | * LOCKING: |
| 724 | * None. |
| 725 | * |
| 726 | * RETURNS: |
| 727 | * Matching xfer_mask, 0 if no match found. |
| 728 | */ |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 729 | unsigned long ata_xfer_mode2mask(u8 xfer_mode) |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 730 | { |
| 731 | const struct ata_xfer_ent *ent; |
| 732 | |
| 733 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| 734 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 735 | return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) |
| 736 | & ~((1 << ent->shift) - 1); |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 737 | return 0; |
| 738 | } |
| 739 | |
| 740 | /** |
| 741 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* |
| 742 | * @xfer_mode: XFER_* of interest |
| 743 | * |
| 744 | * Return matching xfer_shift for @xfer_mode. |
| 745 | * |
| 746 | * LOCKING: |
| 747 | * None. |
| 748 | * |
| 749 | * RETURNS: |
| 750 | * Matching xfer_shift, -1 if no match found. |
| 751 | */ |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 752 | int ata_xfer_mode2shift(unsigned long xfer_mode) |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 753 | { |
| 754 | const struct ata_xfer_ent *ent; |
| 755 | |
| 756 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| 757 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) |
| 758 | return ent->shift; |
| 759 | return -1; |
| 760 | } |
| 761 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | /** |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 763 | * ata_mode_string - convert xfer_mask to string |
| 764 | * @xfer_mask: mask of bits supported; only highest bit counts. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | * |
| 766 | * Determine string which represents the highest speed |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 767 | * (highest bit in @modemask). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | * |
| 769 | * LOCKING: |
| 770 | * None. |
| 771 | * |
| 772 | * RETURNS: |
| 773 | * Constant C string representing highest speed listed in |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 774 | * @mode_mask, or the constant C string "<n/a>". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | */ |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 776 | const char *ata_mode_string(unsigned long xfer_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | { |
Tejun Heo | 75f554b | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 778 | static const char * const xfer_mode_str[] = { |
| 779 | "PIO0", |
| 780 | "PIO1", |
| 781 | "PIO2", |
| 782 | "PIO3", |
| 783 | "PIO4", |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 784 | "PIO5", |
| 785 | "PIO6", |
Tejun Heo | 75f554b | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 786 | "MWDMA0", |
| 787 | "MWDMA1", |
| 788 | "MWDMA2", |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 789 | "MWDMA3", |
| 790 | "MWDMA4", |
Tejun Heo | 75f554b | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 791 | "UDMA/16", |
| 792 | "UDMA/25", |
| 793 | "UDMA/33", |
| 794 | "UDMA/44", |
| 795 | "UDMA/66", |
| 796 | "UDMA/100", |
| 797 | "UDMA/133", |
| 798 | "UDMA7", |
| 799 | }; |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 800 | int highbit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 802 | highbit = fls(xfer_mask) - 1; |
| 803 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) |
| 804 | return xfer_mode_str[highbit]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | return "<n/a>"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | } |
| 807 | |
Tejun Heo | 4c360c8 | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 808 | static const char *sata_spd_string(unsigned int spd) |
| 809 | { |
| 810 | static const char * const spd_str[] = { |
| 811 | "1.5 Gbps", |
| 812 | "3.0 Gbps", |
| 813 | }; |
| 814 | |
| 815 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) |
| 816 | return "<unknown>"; |
| 817 | return spd_str[spd - 1]; |
| 818 | } |
| 819 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 820 | void ata_dev_disable(struct ata_device *dev) |
Tejun Heo | 0b8efb0 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 821 | { |
Tejun Heo | 09d7f9b | 2007-06-25 23:34:02 +0900 | [diff] [blame] | 822 | if (ata_dev_enabled(dev)) { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 823 | if (ata_msg_drv(dev->link->ap)) |
Tejun Heo | 09d7f9b | 2007-06-25 23:34:02 +0900 | [diff] [blame] | 824 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
Tejun Heo | 562f0c2 | 2007-12-15 15:05:01 +0900 | [diff] [blame] | 825 | ata_acpi_on_disable(dev); |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 826 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
| 827 | ATA_DNXFER_QUIET); |
Tejun Heo | 0b8efb0 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 828 | dev->class++; |
| 829 | } |
| 830 | } |
| 831 | |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 832 | static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) |
| 833 | { |
| 834 | struct ata_link *link = dev->link; |
| 835 | struct ata_port *ap = link->ap; |
| 836 | u32 scontrol; |
| 837 | unsigned int err_mask; |
| 838 | int rc; |
| 839 | |
| 840 | /* |
| 841 | * disallow DIPM for drivers which haven't set |
| 842 | * ATA_FLAG_IPM. This is because when DIPM is enabled, |
| 843 | * phy ready will be set in the interrupt status on |
| 844 | * state changes, which will cause some drivers to |
| 845 | * think there are errors - additionally drivers will |
| 846 | * need to disable hot plug. |
| 847 | */ |
| 848 | if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { |
| 849 | ap->pm_policy = NOT_AVAILABLE; |
| 850 | return -EINVAL; |
| 851 | } |
| 852 | |
| 853 | /* |
| 854 | * For DIPM, we will only enable it for the |
| 855 | * min_power setting. |
| 856 | * |
| 857 | * Why? Because Disks are too stupid to know that |
| 858 | * If the host rejects a request to go to SLUMBER |
| 859 | * they should retry at PARTIAL, and instead it |
| 860 | * just would give up. So, for medium_power to |
| 861 | * work at all, we need to only allow HIPM. |
| 862 | */ |
| 863 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); |
| 864 | if (rc) |
| 865 | return rc; |
| 866 | |
| 867 | switch (policy) { |
| 868 | case MIN_POWER: |
| 869 | /* no restrictions on IPM transitions */ |
| 870 | scontrol &= ~(0x3 << 8); |
| 871 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); |
| 872 | if (rc) |
| 873 | return rc; |
| 874 | |
| 875 | /* enable DIPM */ |
| 876 | if (dev->flags & ATA_DFLAG_DIPM) |
| 877 | err_mask = ata_dev_set_feature(dev, |
| 878 | SETFEATURES_SATA_ENABLE, SATA_DIPM); |
| 879 | break; |
| 880 | case MEDIUM_POWER: |
| 881 | /* allow IPM to PARTIAL */ |
| 882 | scontrol &= ~(0x1 << 8); |
| 883 | scontrol |= (0x2 << 8); |
| 884 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); |
| 885 | if (rc) |
| 886 | return rc; |
| 887 | |
Kristen Carlson Accardi | f5456b6 | 2007-11-02 16:37:08 -0700 | [diff] [blame] | 888 | /* |
| 889 | * we don't have to disable DIPM since IPM flags |
| 890 | * disallow transitions to SLUMBER, which effectively |
| 891 | * disable DIPM if it does not support PARTIAL |
| 892 | */ |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 893 | break; |
| 894 | case NOT_AVAILABLE: |
| 895 | case MAX_PERFORMANCE: |
| 896 | /* disable all IPM transitions */ |
| 897 | scontrol |= (0x3 << 8); |
| 898 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); |
| 899 | if (rc) |
| 900 | return rc; |
| 901 | |
Kristen Carlson Accardi | f5456b6 | 2007-11-02 16:37:08 -0700 | [diff] [blame] | 902 | /* |
| 903 | * we don't have to disable DIPM since IPM flags |
| 904 | * disallow all transitions which effectively |
| 905 | * disable DIPM anyway. |
| 906 | */ |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 907 | break; |
| 908 | } |
| 909 | |
| 910 | /* FIXME: handle SET FEATURES failure */ |
| 911 | (void) err_mask; |
| 912 | |
| 913 | return 0; |
| 914 | } |
| 915 | |
| 916 | /** |
| 917 | * ata_dev_enable_pm - enable SATA interface power management |
Stephen Hemminger | 48166fd | 2007-10-31 10:00:27 -0700 | [diff] [blame] | 918 | * @dev: device to enable power management |
| 919 | * @policy: the link power management policy |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 920 | * |
| 921 | * Enable SATA Interface power management. This will enable |
| 922 | * Device Interface Power Management (DIPM) for min_power |
| 923 | * policy, and then call driver specific callbacks for |
| 924 | * enabling Host Initiated Power management. |
| 925 | * |
| 926 | * Locking: Caller. |
| 927 | * Returns: -EINVAL if IPM is not supported, 0 otherwise. |
| 928 | */ |
| 929 | void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) |
| 930 | { |
| 931 | int rc = 0; |
| 932 | struct ata_port *ap = dev->link->ap; |
| 933 | |
| 934 | /* set HIPM first, then DIPM */ |
| 935 | if (ap->ops->enable_pm) |
| 936 | rc = ap->ops->enable_pm(ap, policy); |
| 937 | if (rc) |
| 938 | goto enable_pm_out; |
| 939 | rc = ata_dev_set_dipm(dev, policy); |
| 940 | |
| 941 | enable_pm_out: |
| 942 | if (rc) |
| 943 | ap->pm_policy = MAX_PERFORMANCE; |
| 944 | else |
| 945 | ap->pm_policy = policy; |
| 946 | return /* rc */; /* hopefully we can use 'rc' eventually */ |
| 947 | } |
| 948 | |
Stephen Rothwell | 1992a5e | 2007-10-31 14:53:32 +1100 | [diff] [blame] | 949 | #ifdef CONFIG_PM |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 950 | /** |
| 951 | * ata_dev_disable_pm - disable SATA interface power management |
Stephen Hemminger | 48166fd | 2007-10-31 10:00:27 -0700 | [diff] [blame] | 952 | * @dev: device to disable power management |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 953 | * |
| 954 | * Disable SATA Interface power management. This will disable |
| 955 | * Device Interface Power Management (DIPM) without changing |
| 956 | * policy, call driver specific callbacks for disabling Host |
| 957 | * Initiated Power management. |
| 958 | * |
| 959 | * Locking: Caller. |
| 960 | * Returns: void |
| 961 | */ |
| 962 | static void ata_dev_disable_pm(struct ata_device *dev) |
| 963 | { |
| 964 | struct ata_port *ap = dev->link->ap; |
| 965 | |
| 966 | ata_dev_set_dipm(dev, MAX_PERFORMANCE); |
| 967 | if (ap->ops->disable_pm) |
| 968 | ap->ops->disable_pm(ap); |
| 969 | } |
Stephen Rothwell | 1992a5e | 2007-10-31 14:53:32 +1100 | [diff] [blame] | 970 | #endif /* CONFIG_PM */ |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 971 | |
| 972 | void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) |
| 973 | { |
| 974 | ap->pm_policy = policy; |
Tejun Heo | 3ec25eb | 2008-03-27 18:37:14 +0900 | [diff] [blame^] | 975 | ap->link.eh_info.action |= ATA_EH_LPM; |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 976 | ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; |
| 977 | ata_port_schedule_eh(ap); |
| 978 | } |
| 979 | |
Stephen Rothwell | 1992a5e | 2007-10-31 14:53:32 +1100 | [diff] [blame] | 980 | #ifdef CONFIG_PM |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 981 | static void ata_lpm_enable(struct ata_host *host) |
| 982 | { |
| 983 | struct ata_link *link; |
| 984 | struct ata_port *ap; |
| 985 | struct ata_device *dev; |
| 986 | int i; |
| 987 | |
| 988 | for (i = 0; i < host->n_ports; i++) { |
| 989 | ap = host->ports[i]; |
| 990 | ata_port_for_each_link(link, ap) { |
| 991 | ata_link_for_each_dev(dev, link) |
| 992 | ata_dev_disable_pm(dev); |
| 993 | } |
| 994 | } |
| 995 | } |
| 996 | |
| 997 | static void ata_lpm_disable(struct ata_host *host) |
| 998 | { |
| 999 | int i; |
| 1000 | |
| 1001 | for (i = 0; i < host->n_ports; i++) { |
| 1002 | struct ata_port *ap = host->ports[i]; |
| 1003 | ata_lpm_schedule(ap, ap->pm_policy); |
| 1004 | } |
| 1005 | } |
Stephen Rothwell | 1992a5e | 2007-10-31 14:53:32 +1100 | [diff] [blame] | 1006 | #endif /* CONFIG_PM */ |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 1007 | |
| 1008 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | * ata_devchk - PATA device presence detection |
| 1011 | * @ap: ATA channel to examine |
| 1012 | * @device: Device to examine (starting at zero) |
| 1013 | * |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 1014 | * This technique was originally described in |
| 1015 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 1016 | * later found its way into the ATA/ATAPI spec. |
| 1017 | * |
| 1018 | * Write a pattern to the ATA shadow registers, |
| 1019 | * and if a device is present, it will respond by |
| 1020 | * correctly storing and echoing back the |
| 1021 | * ATA shadow register contents. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | * |
| 1023 | * LOCKING: |
| 1024 | * caller. |
| 1025 | */ |
| 1026 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 1027 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 1029 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1030 | u8 nsect, lbal; |
| 1031 | |
| 1032 | ap->ops->dev_select(ap, device); |
| 1033 | |
| 1034 | iowrite8(0x55, ioaddr->nsect_addr); |
| 1035 | iowrite8(0xaa, ioaddr->lbal_addr); |
| 1036 | |
| 1037 | iowrite8(0xaa, ioaddr->nsect_addr); |
| 1038 | iowrite8(0x55, ioaddr->lbal_addr); |
| 1039 | |
| 1040 | iowrite8(0x55, ioaddr->nsect_addr); |
| 1041 | iowrite8(0xaa, ioaddr->lbal_addr); |
| 1042 | |
| 1043 | nsect = ioread8(ioaddr->nsect_addr); |
| 1044 | lbal = ioread8(ioaddr->lbal_addr); |
| 1045 | |
| 1046 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 1047 | return 1; /* we found a device */ |
| 1048 | |
| 1049 | return 0; /* nothing found */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
| 1051 | |
| 1052 | /** |
| 1053 | * ata_dev_classify - determine device type based on ATA-spec signature |
| 1054 | * @tf: ATA taskfile register set for device to be identified |
| 1055 | * |
| 1056 | * Determine from taskfile register contents whether a device is |
| 1057 | * ATA or ATAPI, as per "Signature and persistence" section |
| 1058 | * of ATA/PI spec (volume 1, sect 5.14). |
| 1059 | * |
| 1060 | * LOCKING: |
| 1061 | * None. |
| 1062 | * |
| 1063 | * RETURNS: |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1064 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
| 1065 | * %ATA_DEV_UNKNOWN the event of failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | */ |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 1067 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | { |
| 1069 | /* Apple's open source Darwin code hints that some devices only |
| 1070 | * put a proper signature into the LBA mid/high registers, |
| 1071 | * So, we only check those. It's sufficient for uniqueness. |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1072 | * |
| 1073 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate |
| 1074 | * signatures for ATA and ATAPI devices attached on SerialATA, |
| 1075 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA |
| 1076 | * spec has never mentioned about using different signatures |
| 1077 | * for ATA/ATAPI devices. Then, Serial ATA II: Port |
| 1078 | * Multiplier specification began to use 0x69/0x96 to identify |
| 1079 | * port multpliers and 0x3c/0xc3 to identify SEMB device. |
| 1080 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and |
| 1081 | * 0x69/0x96 shortly and described them as reserved for |
| 1082 | * SerialATA. |
| 1083 | * |
| 1084 | * We follow the current spec and consider that 0x69/0x96 |
| 1085 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | */ |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1087 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | DPRINTK("found ATA device by sig\n"); |
| 1089 | return ATA_DEV_ATA; |
| 1090 | } |
| 1091 | |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1092 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | DPRINTK("found ATAPI device by sig\n"); |
| 1094 | return ATA_DEV_ATAPI; |
| 1095 | } |
| 1096 | |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1097 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
| 1098 | DPRINTK("found PMP device by sig\n"); |
| 1099 | return ATA_DEV_PMP; |
| 1100 | } |
| 1101 | |
| 1102 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 1103 | printk(KERN_INFO "ata: SEMB device ignored\n"); |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 1104 | return ATA_DEV_SEMB_UNSUP; /* not yet */ |
| 1105 | } |
| 1106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | DPRINTK("unknown device\n"); |
| 1108 | return ATA_DEV_UNKNOWN; |
| 1109 | } |
| 1110 | |
| 1111 | /** |
| 1112 | * ata_dev_try_classify - Parse returned ATA device signature |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 1113 | * @dev: ATA device to classify (starting at zero) |
| 1114 | * @present: device seems present |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 1115 | * @r_err: Value of error register on completion |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | * |
| 1117 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, |
| 1118 | * an ATA/ATAPI-defined set of values is placed in the ATA |
| 1119 | * shadow registers, indicating the results of device detection |
| 1120 | * and diagnostics. |
| 1121 | * |
| 1122 | * Select the ATA device, and read the values from the ATA shadow |
| 1123 | * registers. Then parse according to the Error register value, |
| 1124 | * and the spec-defined values examined by ata_dev_classify(). |
| 1125 | * |
| 1126 | * LOCKING: |
| 1127 | * caller. |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 1128 | * |
| 1129 | * RETURNS: |
| 1130 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | */ |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 1132 | unsigned int ata_dev_try_classify(struct ata_device *dev, int present, |
| 1133 | u8 *r_err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | { |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 1135 | struct ata_port *ap = dev->link->ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | struct ata_taskfile tf; |
| 1137 | unsigned int class; |
| 1138 | u8 err; |
| 1139 | |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 1140 | ap->ops->dev_select(ap, dev->devno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | |
| 1142 | memset(&tf, 0, sizeof(tf)); |
| 1143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | ap->ops->tf_read(ap, &tf); |
Jeff Garzik | 0169e28 | 2005-10-29 21:25:10 -0400 | [diff] [blame] | 1145 | err = tf.feature; |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 1146 | if (r_err) |
| 1147 | *r_err = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
Alan Cox | c5038fc | 2007-10-25 14:21:16 +0100 | [diff] [blame] | 1149 | /* see if device passed diags: continue and warn later */ |
| 1150 | if (err == 0) |
Alan Cox | 9359085 | 2006-09-12 16:55:12 +0100 | [diff] [blame] | 1151 | /* diagnostic fail : do nothing _YET_ */ |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 1152 | dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; |
Alan Cox | 9359085 | 2006-09-12 16:55:12 +0100 | [diff] [blame] | 1153 | else if (err == 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | /* do nothing */ ; |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 1155 | else if ((dev->devno == 0) && (err == 0x81)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | /* do nothing */ ; |
| 1157 | else |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 1158 | return ATA_DEV_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 1160 | /* determine if device is ATA or ATAPI */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | class = ata_dev_classify(&tf); |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 1162 | |
Tejun Heo | d7fbee0 | 2007-09-02 23:24:48 +0900 | [diff] [blame] | 1163 | if (class == ATA_DEV_UNKNOWN) { |
| 1164 | /* If the device failed diagnostic, it's likely to |
| 1165 | * have reported incorrect device signature too. |
| 1166 | * Assume ATA device if the device seems present but |
| 1167 | * device signature is invalid with diagnostic |
| 1168 | * failure. |
| 1169 | */ |
| 1170 | if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) |
| 1171 | class = ATA_DEV_ATA; |
| 1172 | else |
| 1173 | class = ATA_DEV_NONE; |
| 1174 | } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
| 1175 | class = ATA_DEV_NONE; |
| 1176 | |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 1177 | return class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | } |
| 1179 | |
| 1180 | /** |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 1181 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | * @id: IDENTIFY DEVICE results we will examine |
| 1183 | * @s: string into which data is output |
| 1184 | * @ofs: offset into identify device page |
| 1185 | * @len: length of string to return. must be an even number. |
| 1186 | * |
| 1187 | * The strings in the IDENTIFY DEVICE page are broken up into |
| 1188 | * 16-bit chunks. Run through the string, and output each |
| 1189 | * 8-bit chunk linearly, regardless of platform. |
| 1190 | * |
| 1191 | * LOCKING: |
| 1192 | * caller. |
| 1193 | */ |
| 1194 | |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 1195 | void ata_id_string(const u16 *id, unsigned char *s, |
| 1196 | unsigned int ofs, unsigned int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | { |
| 1198 | unsigned int c; |
| 1199 | |
| 1200 | while (len > 0) { |
| 1201 | c = id[ofs] >> 8; |
| 1202 | *s = c; |
| 1203 | s++; |
| 1204 | |
| 1205 | c = id[ofs] & 0xff; |
| 1206 | *s = c; |
| 1207 | s++; |
| 1208 | |
| 1209 | ofs++; |
| 1210 | len -= 2; |
| 1211 | } |
| 1212 | } |
| 1213 | |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 1214 | /** |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 1215 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 1216 | * @id: IDENTIFY DEVICE results we will examine |
| 1217 | * @s: string into which data is output |
| 1218 | * @ofs: offset into identify device page |
| 1219 | * @len: length of string to return. must be an odd number. |
| 1220 | * |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 1221 | * This function is identical to ata_id_string except that it |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 1222 | * trims trailing spaces and terminates the resulting string with |
| 1223 | * null. @len must be actual maximum length (even number) + 1. |
| 1224 | * |
| 1225 | * LOCKING: |
| 1226 | * caller. |
| 1227 | */ |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 1228 | void ata_id_c_string(const u16 *id, unsigned char *s, |
| 1229 | unsigned int ofs, unsigned int len) |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 1230 | { |
| 1231 | unsigned char *p; |
| 1232 | |
| 1233 | WARN_ON(!(len & 1)); |
| 1234 | |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 1235 | ata_id_string(id, s, ofs, len - 1); |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 1236 | |
| 1237 | p = s + strnlen(s, len - 1); |
| 1238 | while (p > s && p[-1] == ' ') |
| 1239 | p--; |
| 1240 | *p = '\0'; |
| 1241 | } |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 1242 | |
Tejun Heo | db6f875 | 2007-09-03 12:31:58 +0900 | [diff] [blame] | 1243 | static u64 ata_id_n_sectors(const u16 *id) |
| 1244 | { |
| 1245 | if (ata_id_has_lba(id)) { |
| 1246 | if (ata_id_has_lba48(id)) |
| 1247 | return ata_id_u64(id, 100); |
| 1248 | else |
| 1249 | return ata_id_u32(id, 60); |
| 1250 | } else { |
| 1251 | if (ata_id_current_chs_valid(id)) |
| 1252 | return ata_id_u32(id, 57); |
| 1253 | else |
| 1254 | return id[1] * id[3] * id[6]; |
| 1255 | } |
| 1256 | } |
| 1257 | |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1258 | static u64 ata_tf_to_lba48(struct ata_taskfile *tf) |
| 1259 | { |
| 1260 | u64 sectors = 0; |
| 1261 | |
| 1262 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; |
| 1263 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; |
| 1264 | sectors |= (tf->hob_lbal & 0xff) << 24; |
| 1265 | sectors |= (tf->lbah & 0xff) << 16; |
| 1266 | sectors |= (tf->lbam & 0xff) << 8; |
| 1267 | sectors |= (tf->lbal & 0xff); |
| 1268 | |
| 1269 | return ++sectors; |
| 1270 | } |
| 1271 | |
| 1272 | static u64 ata_tf_to_lba(struct ata_taskfile *tf) |
| 1273 | { |
| 1274 | u64 sectors = 0; |
| 1275 | |
| 1276 | sectors |= (tf->device & 0x0f) << 24; |
| 1277 | sectors |= (tf->lbah & 0xff) << 16; |
| 1278 | sectors |= (tf->lbam & 0xff) << 8; |
| 1279 | sectors |= (tf->lbal & 0xff); |
| 1280 | |
| 1281 | return ++sectors; |
| 1282 | } |
| 1283 | |
| 1284 | /** |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1285 | * ata_read_native_max_address - Read native max address |
| 1286 | * @dev: target device |
| 1287 | * @max_sectors: out parameter for the result native max address |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1288 | * |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1289 | * Perform an LBA48 or LBA28 native size query upon the device in |
| 1290 | * question. |
| 1291 | * |
| 1292 | * RETURNS: |
| 1293 | * 0 on success, -EACCES if command is aborted by the drive. |
| 1294 | * -EIO on other errors. |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1295 | */ |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1296 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1297 | { |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1298 | unsigned int err_mask; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1299 | struct ata_taskfile tf; |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1300 | int lba48 = ata_id_has_lba48(dev->id); |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1301 | |
| 1302 | ata_tf_init(dev, &tf); |
| 1303 | |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1304 | /* always clear all address registers */ |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1305 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1306 | |
| 1307 | if (lba48) { |
| 1308 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; |
| 1309 | tf.flags |= ATA_TFLAG_LBA48; |
| 1310 | } else |
| 1311 | tf.command = ATA_CMD_READ_NATIVE_MAX; |
| 1312 | |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1313 | tf.protocol |= ATA_PROT_NODATA; |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1314 | tf.device |= ATA_LBA; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1315 | |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1316 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1317 | if (err_mask) { |
| 1318 | ata_dev_printk(dev, KERN_WARNING, "failed to read native " |
| 1319 | "max address (err_mask=0x%x)\n", err_mask); |
| 1320 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) |
| 1321 | return -EACCES; |
| 1322 | return -EIO; |
| 1323 | } |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1324 | |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1325 | if (lba48) |
| 1326 | *max_sectors = ata_tf_to_lba48(&tf); |
| 1327 | else |
| 1328 | *max_sectors = ata_tf_to_lba(&tf); |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 1329 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
Alan Cox | 93328e1 | 2007-09-29 04:06:48 -0400 | [diff] [blame] | 1330 | (*max_sectors)--; |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1331 | return 0; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1332 | } |
| 1333 | |
| 1334 | /** |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1335 | * ata_set_max_sectors - Set max sectors |
| 1336 | * @dev: target device |
Randy Dunlap | 6b38d1d | 2007-05-01 17:35:55 -0700 | [diff] [blame] | 1337 | * @new_sectors: new max sectors value to set for the device |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1338 | * |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1339 | * Set max sectors of @dev to @new_sectors. |
| 1340 | * |
| 1341 | * RETURNS: |
| 1342 | * 0 on success, -EACCES if command is aborted or denied (due to |
| 1343 | * previous non-volatile SET_MAX) by the drive. -EIO on other |
| 1344 | * errors. |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1345 | */ |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1346 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1347 | { |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1348 | unsigned int err_mask; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1349 | struct ata_taskfile tf; |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1350 | int lba48 = ata_id_has_lba48(dev->id); |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1351 | |
| 1352 | new_sectors--; |
| 1353 | |
| 1354 | ata_tf_init(dev, &tf); |
| 1355 | |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1356 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1357 | |
| 1358 | if (lba48) { |
| 1359 | tf.command = ATA_CMD_SET_MAX_EXT; |
| 1360 | tf.flags |= ATA_TFLAG_LBA48; |
| 1361 | |
| 1362 | tf.hob_lbal = (new_sectors >> 24) & 0xff; |
| 1363 | tf.hob_lbam = (new_sectors >> 32) & 0xff; |
| 1364 | tf.hob_lbah = (new_sectors >> 40) & 0xff; |
Tejun Heo | 1e582ba | 2007-09-21 20:07:14 +0900 | [diff] [blame] | 1365 | } else { |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1366 | tf.command = ATA_CMD_SET_MAX; |
| 1367 | |
Tejun Heo | 1e582ba | 2007-09-21 20:07:14 +0900 | [diff] [blame] | 1368 | tf.device |= (new_sectors >> 24) & 0xf; |
| 1369 | } |
| 1370 | |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1371 | tf.protocol |= ATA_PROT_NODATA; |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1372 | tf.device |= ATA_LBA; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1373 | |
| 1374 | tf.lbal = (new_sectors >> 0) & 0xff; |
| 1375 | tf.lbam = (new_sectors >> 8) & 0xff; |
| 1376 | tf.lbah = (new_sectors >> 16) & 0xff; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1377 | |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1378 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1379 | if (err_mask) { |
| 1380 | ata_dev_printk(dev, KERN_WARNING, "failed to set " |
| 1381 | "max address (err_mask=0x%x)\n", err_mask); |
| 1382 | if (err_mask == AC_ERR_DEV && |
| 1383 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) |
| 1384 | return -EACCES; |
| 1385 | return -EIO; |
| 1386 | } |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1387 | |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1388 | return 0; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1389 | } |
| 1390 | |
| 1391 | /** |
| 1392 | * ata_hpa_resize - Resize a device with an HPA set |
| 1393 | * @dev: Device to resize |
| 1394 | * |
| 1395 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize |
| 1396 | * it if required to the full size of the media. The caller must check |
| 1397 | * the drive has the HPA feature set enabled. |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1398 | * |
| 1399 | * RETURNS: |
| 1400 | * 0 on success, -errno on failure. |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1401 | */ |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1402 | static int ata_hpa_resize(struct ata_device *dev) |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1403 | { |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1404 | struct ata_eh_context *ehc = &dev->link->eh_context; |
| 1405 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
| 1406 | u64 sectors = ata_id_n_sectors(dev->id); |
| 1407 | u64 native_sectors; |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1408 | int rc; |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 1409 | |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1410 | /* do we need to do it? */ |
| 1411 | if (dev->class != ATA_DEV_ATA || |
| 1412 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || |
| 1413 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) |
Tejun Heo | c728a91 | 2007-09-03 12:32:30 +0900 | [diff] [blame] | 1414 | return 0; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1415 | |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1416 | /* read native max address */ |
| 1417 | rc = ata_read_native_max_address(dev, &native_sectors); |
| 1418 | if (rc) { |
Tejun Heo | dda7aba | 2008-03-23 21:05:15 +0900 | [diff] [blame] | 1419 | /* If device aborted the command or HPA isn't going to |
| 1420 | * be unlocked, skip HPA resizing. |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1421 | */ |
Tejun Heo | dda7aba | 2008-03-23 21:05:15 +0900 | [diff] [blame] | 1422 | if (rc == -EACCES || !ata_ignore_hpa) { |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1423 | ata_dev_printk(dev, KERN_WARNING, "HPA support seems " |
Tejun Heo | dda7aba | 2008-03-23 21:05:15 +0900 | [diff] [blame] | 1424 | "broken, skipping HPA handling\n"); |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1425 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1426 | |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1427 | /* we can continue if device aborted the command */ |
| 1428 | if (rc == -EACCES) |
| 1429 | rc = 0; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1430 | } |
Tejun Heo | 37301a5 | 2007-06-25 20:45:54 +0900 | [diff] [blame] | 1431 | |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 1432 | return rc; |
| 1433 | } |
| 1434 | |
| 1435 | /* nothing to do? */ |
| 1436 | if (native_sectors <= sectors || !ata_ignore_hpa) { |
| 1437 | if (!print_info || native_sectors == sectors) |
| 1438 | return 0; |
| 1439 | |
| 1440 | if (native_sectors > sectors) |
| 1441 | ata_dev_printk(dev, KERN_INFO, |
| 1442 | "HPA detected: current %llu, native %llu\n", |
| 1443 | (unsigned long long)sectors, |
| 1444 | (unsigned long long)native_sectors); |
| 1445 | else if (native_sectors < sectors) |
| 1446 | ata_dev_printk(dev, KERN_WARNING, |
| 1447 | "native sectors (%llu) is smaller than " |
| 1448 | "sectors (%llu)\n", |
| 1449 | (unsigned long long)native_sectors, |
| 1450 | (unsigned long long)sectors); |
| 1451 | return 0; |
| 1452 | } |
| 1453 | |
| 1454 | /* let's unlock HPA */ |
| 1455 | rc = ata_set_max_sectors(dev, native_sectors); |
| 1456 | if (rc == -EACCES) { |
| 1457 | /* if device aborted the command, skip HPA resizing */ |
| 1458 | ata_dev_printk(dev, KERN_WARNING, "device aborted resize " |
| 1459 | "(%llu -> %llu), skipping HPA handling\n", |
| 1460 | (unsigned long long)sectors, |
| 1461 | (unsigned long long)native_sectors); |
| 1462 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
| 1463 | return 0; |
| 1464 | } else if (rc) |
| 1465 | return rc; |
| 1466 | |
| 1467 | /* re-read IDENTIFY data */ |
| 1468 | rc = ata_dev_reread_id(dev, 0); |
| 1469 | if (rc) { |
| 1470 | ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " |
| 1471 | "data after HPA resizing\n"); |
| 1472 | return rc; |
| 1473 | } |
| 1474 | |
| 1475 | if (print_info) { |
| 1476 | u64 new_sectors = ata_id_n_sectors(dev->id); |
| 1477 | ata_dev_printk(dev, KERN_INFO, |
| 1478 | "HPA unlocked: %llu -> %llu, native %llu\n", |
| 1479 | (unsigned long long)sectors, |
| 1480 | (unsigned long long)new_sectors, |
| 1481 | (unsigned long long)native_sectors); |
| 1482 | } |
| 1483 | |
| 1484 | return 0; |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1485 | } |
| 1486 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 1487 | /** |
| 1488 | * ata_noop_dev_select - Select device 0/1 on ATA bus |
| 1489 | * @ap: ATA channel to manipulate |
| 1490 | * @device: ATA device (numbered from zero) to select |
| 1491 | * |
| 1492 | * This function performs no actual function. |
| 1493 | * |
| 1494 | * May be used as the dev_select() entry in ata_port_operations. |
| 1495 | * |
| 1496 | * LOCKING: |
| 1497 | * caller. |
| 1498 | */ |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 1499 | void ata_noop_dev_select(struct ata_port *ap, unsigned int device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | { |
| 1501 | } |
| 1502 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 1503 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | /** |
| 1505 | * ata_std_dev_select - Select device 0/1 on ATA bus |
| 1506 | * @ap: ATA channel to manipulate |
| 1507 | * @device: ATA device (numbered from zero) to select |
| 1508 | * |
| 1509 | * Use the method defined in the ATA specification to |
| 1510 | * make either device 0, or device 1, active on the |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 1511 | * ATA channel. Works with both PIO and MMIO. |
| 1512 | * |
| 1513 | * May be used as the dev_select() entry in ata_port_operations. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | * |
| 1515 | * LOCKING: |
| 1516 | * caller. |
| 1517 | */ |
| 1518 | |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 1519 | void ata_std_dev_select(struct ata_port *ap, unsigned int device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | { |
| 1521 | u8 tmp; |
| 1522 | |
| 1523 | if (device == 0) |
| 1524 | tmp = ATA_DEVICE_OBS; |
| 1525 | else |
| 1526 | tmp = ATA_DEVICE_OBS | ATA_DEV1; |
| 1527 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 1528 | iowrite8(tmp, ap->ioaddr.device_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | ata_pause(ap); /* needed; also flushes, for mmio */ |
| 1530 | } |
| 1531 | |
| 1532 | /** |
| 1533 | * ata_dev_select - Select device 0/1 on ATA bus |
| 1534 | * @ap: ATA channel to manipulate |
| 1535 | * @device: ATA device (numbered from zero) to select |
| 1536 | * @wait: non-zero to wait for Status register BSY bit to clear |
| 1537 | * @can_sleep: non-zero if context allows sleeping |
| 1538 | * |
| 1539 | * Use the method defined in the ATA specification to |
| 1540 | * make either device 0, or device 1, active on the |
| 1541 | * ATA channel. |
| 1542 | * |
| 1543 | * This is a high-level version of ata_std_dev_select(), |
| 1544 | * which additionally provides the services of inserting |
| 1545 | * the proper pauses and status polling, where needed. |
| 1546 | * |
| 1547 | * LOCKING: |
| 1548 | * caller. |
| 1549 | */ |
| 1550 | |
| 1551 | void ata_dev_select(struct ata_port *ap, unsigned int device, |
| 1552 | unsigned int wait, unsigned int can_sleep) |
| 1553 | { |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1554 | if (ata_msg_probe(ap)) |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1555 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
| 1556 | "device %u, wait %u\n", device, wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | |
| 1558 | if (wait) |
| 1559 | ata_wait_idle(ap); |
| 1560 | |
| 1561 | ap->ops->dev_select(ap, device); |
| 1562 | |
| 1563 | if (wait) { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1564 | if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | msleep(150); |
| 1566 | ata_wait_idle(ap); |
| 1567 | } |
| 1568 | } |
| 1569 | |
| 1570 | /** |
| 1571 | * ata_dump_id - IDENTIFY DEVICE info debugging output |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1572 | * @id: IDENTIFY DEVICE page to dump |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | * |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1574 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
| 1575 | * page. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | * |
| 1577 | * LOCKING: |
| 1578 | * caller. |
| 1579 | */ |
| 1580 | |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1581 | static inline void ata_dump_id(const u16 *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | { |
| 1583 | DPRINTK("49==0x%04x " |
| 1584 | "53==0x%04x " |
| 1585 | "63==0x%04x " |
| 1586 | "64==0x%04x " |
| 1587 | "75==0x%04x \n", |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1588 | id[49], |
| 1589 | id[53], |
| 1590 | id[63], |
| 1591 | id[64], |
| 1592 | id[75]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | DPRINTK("80==0x%04x " |
| 1594 | "81==0x%04x " |
| 1595 | "82==0x%04x " |
| 1596 | "83==0x%04x " |
| 1597 | "84==0x%04x \n", |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1598 | id[80], |
| 1599 | id[81], |
| 1600 | id[82], |
| 1601 | id[83], |
| 1602 | id[84]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | DPRINTK("88==0x%04x " |
| 1604 | "93==0x%04x\n", |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1605 | id[88], |
| 1606 | id[93]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | } |
| 1608 | |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1609 | /** |
| 1610 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data |
| 1611 | * @id: IDENTIFY data to compute xfer mask from |
| 1612 | * |
| 1613 | * Compute the xfermask for this device. This is not as trivial |
| 1614 | * as it seems if we must consider early devices correctly. |
| 1615 | * |
| 1616 | * FIXME: pre IDE drive timing (do we care ?). |
| 1617 | * |
| 1618 | * LOCKING: |
| 1619 | * None. |
| 1620 | * |
| 1621 | * RETURNS: |
| 1622 | * Computed xfermask |
| 1623 | */ |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 1624 | unsigned long ata_id_xfermask(const u16 *id) |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1625 | { |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 1626 | unsigned long pio_mask, mwdma_mask, udma_mask; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1627 | |
| 1628 | /* Usual case. Word 53 indicates word 64 is valid */ |
| 1629 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { |
| 1630 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; |
| 1631 | pio_mask <<= 3; |
| 1632 | pio_mask |= 0x7; |
| 1633 | } else { |
| 1634 | /* If word 64 isn't valid then Word 51 high byte holds |
| 1635 | * the PIO timing number for the maximum. Turn it into |
| 1636 | * a mask. |
| 1637 | */ |
Lennert Buytenhek | 7a0f1c8 | 2007-01-29 13:28:47 +0100 | [diff] [blame] | 1638 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
Alan Cox | 46767aeb | 2006-09-29 18:26:47 +0100 | [diff] [blame] | 1639 | if (mode < 5) /* Valid PIO range */ |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 1640 | pio_mask = (2 << mode) - 1; |
Alan Cox | 46767aeb | 2006-09-29 18:26:47 +0100 | [diff] [blame] | 1641 | else |
| 1642 | pio_mask = 1; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1643 | |
| 1644 | /* But wait.. there's more. Design your standards by |
| 1645 | * committee and you too can get a free iordy field to |
| 1646 | * process. However its the speeds not the modes that |
| 1647 | * are supported... Note drivers using the timing API |
| 1648 | * will get this right anyway |
| 1649 | */ |
| 1650 | } |
| 1651 | |
| 1652 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; |
Tejun Heo | fb21f0d | 2006-03-12 12:34:35 +0900 | [diff] [blame] | 1653 | |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 1654 | if (ata_id_is_cfa(id)) { |
| 1655 | /* |
| 1656 | * Process compact flash extended modes |
| 1657 | */ |
| 1658 | int pio = id[163] & 0x7; |
| 1659 | int dma = (id[163] >> 3) & 7; |
| 1660 | |
| 1661 | if (pio) |
| 1662 | pio_mask |= (1 << 5); |
| 1663 | if (pio > 1) |
| 1664 | pio_mask |= (1 << 6); |
| 1665 | if (dma) |
| 1666 | mwdma_mask |= (1 << 3); |
| 1667 | if (dma > 1) |
| 1668 | mwdma_mask |= (1 << 4); |
| 1669 | } |
| 1670 | |
Tejun Heo | fb21f0d | 2006-03-12 12:34:35 +0900 | [diff] [blame] | 1671 | udma_mask = 0; |
| 1672 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) |
| 1673 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1674 | |
| 1675 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
| 1676 | } |
| 1677 | |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1678 | /** |
Jeff Garzik | 442eacc | 2007-12-19 04:25:10 -0500 | [diff] [blame] | 1679 | * ata_pio_queue_task - Queue port_task |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1680 | * @ap: The ata_port to queue port_task for |
Randy Dunlap | e2a7f77 | 2006-05-18 10:50:18 -0700 | [diff] [blame] | 1681 | * @fn: workqueue function to be scheduled |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 1682 | * @data: data for @fn to use |
Randy Dunlap | e2a7f77 | 2006-05-18 10:50:18 -0700 | [diff] [blame] | 1683 | * @delay: delay time for workqueue function |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1684 | * |
| 1685 | * Schedule @fn(@data) for execution after @delay jiffies using |
| 1686 | * port_task. There is one port_task per port and it's the |
| 1687 | * user(low level driver)'s responsibility to make sure that only |
| 1688 | * one task is active at any given time. |
| 1689 | * |
| 1690 | * libata core layer takes care of synchronization between |
Jeff Garzik | 442eacc | 2007-12-19 04:25:10 -0500 | [diff] [blame] | 1691 | * port_task and EH. ata_pio_queue_task() may be ignored for EH |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1692 | * synchronization. |
| 1693 | * |
| 1694 | * LOCKING: |
| 1695 | * Inherited from caller. |
| 1696 | */ |
Jeff Garzik | 442eacc | 2007-12-19 04:25:10 -0500 | [diff] [blame] | 1697 | static void ata_pio_queue_task(struct ata_port *ap, void *data, |
| 1698 | unsigned long delay) |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1699 | { |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 1700 | ap->port_task_data = data; |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1701 | |
Oleg Nesterov | 45a66c1 | 2007-07-09 11:46:13 -0700 | [diff] [blame] | 1702 | /* may fail if ata_port_flush_task() in progress */ |
| 1703 | queue_delayed_work(ata_wq, &ap->port_task, delay); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1704 | } |
| 1705 | |
| 1706 | /** |
| 1707 | * ata_port_flush_task - Flush port_task |
| 1708 | * @ap: The ata_port to flush port_task for |
| 1709 | * |
| 1710 | * After this function completes, port_task is guranteed not to |
| 1711 | * be running or scheduled. |
| 1712 | * |
| 1713 | * LOCKING: |
| 1714 | * Kernel thread context (may sleep) |
| 1715 | */ |
| 1716 | void ata_port_flush_task(struct ata_port *ap) |
| 1717 | { |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1718 | DPRINTK("ENTER\n"); |
| 1719 | |
Oleg Nesterov | 45a66c1 | 2007-07-09 11:46:13 -0700 | [diff] [blame] | 1720 | cancel_rearming_delayed_work(&ap->port_task); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1721 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1722 | if (ata_msg_ctl(ap)) |
Harvey Harrison | 7f5e4e8 | 2008-03-05 18:24:52 -0800 | [diff] [blame] | 1723 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1724 | } |
| 1725 | |
Adrian Bunk | 7102d23 | 2007-01-04 00:09:36 +0100 | [diff] [blame] | 1726 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1727 | { |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1728 | struct completion *waiting = qc->private_data; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1729 | |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1730 | complete(waiting); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1731 | } |
| 1732 | |
| 1733 | /** |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1734 | * ata_exec_internal_sg - execute libata internal command |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1735 | * @dev: Device to which the command is sent |
| 1736 | * @tf: Taskfile registers for the command and the result |
Tejun Heo | d69cf37 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1737 | * @cdb: CDB for packet command |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1738 | * @dma_dir: Data tranfer direction of the command |
Randy Dunlap | 5c1ad8b | 2007-10-18 14:12:26 -0700 | [diff] [blame] | 1739 | * @sgl: sg list for the data buffer of the command |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1740 | * @n_elem: Number of sg entries |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1741 | * @timeout: Timeout in msecs (0 for default) |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1742 | * |
| 1743 | * Executes libata internal command with timeout. @tf contains |
| 1744 | * command on entry and result on return. Timeout and error |
| 1745 | * conditions are reported via return value. No recovery action |
| 1746 | * is taken after a command times out. It's caller's duty to |
| 1747 | * clean up after timeout. |
| 1748 | * |
| 1749 | * LOCKING: |
| 1750 | * None. Should be called with kernel context, might sleep. |
Tejun Heo | 551e888 | 2006-06-12 14:09:49 +0900 | [diff] [blame] | 1751 | * |
| 1752 | * RETURNS: |
| 1753 | * Zero on success, AC_ERR_* mask on failure |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1754 | */ |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1755 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
| 1756 | struct ata_taskfile *tf, const u8 *cdb, |
Jens Axboe | 8726021 | 2007-10-16 11:14:12 +0200 | [diff] [blame] | 1757 | int dma_dir, struct scatterlist *sgl, |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1758 | unsigned int n_elem, unsigned long timeout) |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1759 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1760 | struct ata_link *link = dev->link; |
| 1761 | struct ata_port *ap = link->ap; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1762 | u8 command = tf->command; |
| 1763 | struct ata_queued_cmd *qc; |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1764 | unsigned int tag, preempted_tag; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1765 | u32 preempted_sactive, preempted_qc_active; |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1766 | int preempted_nr_active_links; |
Ingo Molnar | 60be6b9 | 2006-07-03 00:25:26 -0700 | [diff] [blame] | 1767 | DECLARE_COMPLETION_ONSTACK(wait); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1768 | unsigned long flags; |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1769 | unsigned int err_mask; |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1770 | int rc; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1771 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1772 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1773 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1774 | /* no internal command while frozen */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1775 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1776 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1777 | return AC_ERR_SYSTEM; |
| 1778 | } |
| 1779 | |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1780 | /* initialize internal qc */ |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1781 | |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1782 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
| 1783 | * drivers choke if any other tag is given. This breaks |
| 1784 | * ata_tag_internal() test for those drivers. Don't use new |
| 1785 | * EH stuff without converting to it. |
| 1786 | */ |
| 1787 | if (ap->ops->error_handler) |
| 1788 | tag = ATA_TAG_INTERNAL; |
| 1789 | else |
| 1790 | tag = 0; |
| 1791 | |
Tejun Heo | 6cec4a3 | 2006-05-15 21:03:41 +0900 | [diff] [blame] | 1792 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1793 | BUG(); |
Tejun Heo | f69499f | 2006-05-15 20:58:03 +0900 | [diff] [blame] | 1794 | qc = __ata_qc_from_tag(ap, tag); |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1795 | |
| 1796 | qc->tag = tag; |
| 1797 | qc->scsicmd = NULL; |
| 1798 | qc->ap = ap; |
| 1799 | qc->dev = dev; |
| 1800 | ata_qc_reinit(qc); |
| 1801 | |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1802 | preempted_tag = link->active_tag; |
| 1803 | preempted_sactive = link->sactive; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1804 | preempted_qc_active = ap->qc_active; |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1805 | preempted_nr_active_links = ap->nr_active_links; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1806 | link->active_tag = ATA_TAG_POISON; |
| 1807 | link->sactive = 0; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1808 | ap->qc_active = 0; |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1809 | ap->nr_active_links = 0; |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1810 | |
| 1811 | /* prepare & issue qc */ |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1812 | qc->tf = *tf; |
Tejun Heo | d69cf37 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1813 | if (cdb) |
| 1814 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); |
Tejun Heo | e61e067 | 2006-05-15 20:57:40 +0900 | [diff] [blame] | 1815 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1816 | qc->dma_dir = dma_dir; |
| 1817 | if (dma_dir != DMA_NONE) { |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1818 | unsigned int i, buflen = 0; |
Jens Axboe | 8726021 | 2007-10-16 11:14:12 +0200 | [diff] [blame] | 1819 | struct scatterlist *sg; |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1820 | |
Jens Axboe | 8726021 | 2007-10-16 11:14:12 +0200 | [diff] [blame] | 1821 | for_each_sg(sgl, sg, n_elem, i) |
| 1822 | buflen += sg->length; |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1823 | |
Jens Axboe | 8726021 | 2007-10-16 11:14:12 +0200 | [diff] [blame] | 1824 | ata_sg_init(qc, sgl, n_elem); |
Brian King | 49c8042 | 2007-01-30 11:32:26 -0600 | [diff] [blame] | 1825 | qc->nbytes = buflen; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1826 | } |
| 1827 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1828 | qc->private_data = &wait; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1829 | qc->complete_fn = ata_qc_complete_internal; |
| 1830 | |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 1831 | ata_qc_issue(qc); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1832 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1833 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1834 | |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1835 | if (!timeout) |
| 1836 | timeout = ata_probe_timeout * 1000 / HZ; |
| 1837 | |
| 1838 | rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); |
Albert Lee | 41ade50 | 2006-03-14 11:19:04 +0800 | [diff] [blame] | 1839 | |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1840 | ata_port_flush_task(ap); |
| 1841 | |
| 1842 | if (!rc) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1843 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1844 | |
| 1845 | /* We're racing with irq here. If we lose, the |
| 1846 | * following test prevents us from completing the qc |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1847 | * twice. If we win, the port is frozen and will be |
| 1848 | * cleaned up by ->post_internal_cmd(). |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1849 | */ |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1850 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1851 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 1852 | |
| 1853 | if (ap->ops->error_handler) |
| 1854 | ata_port_freeze(ap); |
| 1855 | else |
| 1856 | ata_qc_complete(qc); |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 1857 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1858 | if (ata_msg_warn(ap)) |
| 1859 | ata_dev_printk(dev, KERN_WARNING, |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1860 | "qc timeout (cmd 0x%x)\n", command); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1861 | } |
| 1862 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1863 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1864 | } |
| 1865 | |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1866 | /* do post_internal_cmd */ |
| 1867 | if (ap->ops->post_internal_cmd) |
| 1868 | ap->ops->post_internal_cmd(qc); |
| 1869 | |
Tejun Heo | a51d644 | 2007-03-20 15:24:11 +0900 | [diff] [blame] | 1870 | /* perform minimal error analysis */ |
| 1871 | if (qc->flags & ATA_QCFLAG_FAILED) { |
| 1872 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) |
| 1873 | qc->err_mask |= AC_ERR_DEV; |
| 1874 | |
| 1875 | if (!qc->err_mask) |
| 1876 | qc->err_mask |= AC_ERR_OTHER; |
| 1877 | |
| 1878 | if (qc->err_mask & ~AC_ERR_OTHER) |
| 1879 | qc->err_mask &= ~AC_ERR_OTHER; |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1880 | } |
| 1881 | |
Tejun Heo | 1586930 | 2006-05-15 20:57:33 +0900 | [diff] [blame] | 1882 | /* finish up */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1883 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 1586930 | 2006-05-15 20:57:33 +0900 | [diff] [blame] | 1884 | |
Tejun Heo | e61e067 | 2006-05-15 20:57:40 +0900 | [diff] [blame] | 1885 | *tf = qc->result_tf; |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1886 | err_mask = qc->err_mask; |
| 1887 | |
| 1888 | ata_qc_free(qc); |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1889 | link->active_tag = preempted_tag; |
| 1890 | link->sactive = preempted_sactive; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1891 | ap->qc_active = preempted_qc_active; |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1892 | ap->nr_active_links = preempted_nr_active_links; |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1893 | |
Tejun Heo | 1f7dd3e9 | 2006-03-24 15:25:30 +0900 | [diff] [blame] | 1894 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
| 1895 | * Until those drivers are fixed, we detect the condition |
| 1896 | * here, fail the command with AC_ERR_SYSTEM and reenable the |
| 1897 | * port. |
| 1898 | * |
| 1899 | * Note that this doesn't change any behavior as internal |
| 1900 | * command failure results in disabling the device in the |
| 1901 | * higher layer for LLDDs without new reset/EH callbacks. |
| 1902 | * |
| 1903 | * Kill the following code as soon as those drivers are fixed. |
| 1904 | */ |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 1905 | if (ap->flags & ATA_FLAG_DISABLED) { |
Tejun Heo | 1f7dd3e9 | 2006-03-24 15:25:30 +0900 | [diff] [blame] | 1906 | err_mask |= AC_ERR_SYSTEM; |
| 1907 | ata_port_probe(ap); |
| 1908 | } |
| 1909 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1910 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 1586930 | 2006-05-15 20:57:33 +0900 | [diff] [blame] | 1911 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1912 | return err_mask; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1913 | } |
| 1914 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | /** |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1916 | * ata_exec_internal - execute libata internal command |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1917 | * @dev: Device to which the command is sent |
| 1918 | * @tf: Taskfile registers for the command and the result |
| 1919 | * @cdb: CDB for packet command |
| 1920 | * @dma_dir: Data tranfer direction of the command |
| 1921 | * @buf: Data buffer of the command |
| 1922 | * @buflen: Length of data buffer |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1923 | * @timeout: Timeout in msecs (0 for default) |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1924 | * |
| 1925 | * Wrapper around ata_exec_internal_sg() which takes simple |
| 1926 | * buffer instead of sg list. |
| 1927 | * |
| 1928 | * LOCKING: |
| 1929 | * None. Should be called with kernel context, might sleep. |
| 1930 | * |
| 1931 | * RETURNS: |
| 1932 | * Zero on success, AC_ERR_* mask on failure |
| 1933 | */ |
| 1934 | unsigned ata_exec_internal(struct ata_device *dev, |
| 1935 | struct ata_taskfile *tf, const u8 *cdb, |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1936 | int dma_dir, void *buf, unsigned int buflen, |
| 1937 | unsigned long timeout) |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1938 | { |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1939 | struct scatterlist *psg = NULL, sg; |
| 1940 | unsigned int n_elem = 0; |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1941 | |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1942 | if (dma_dir != DMA_NONE) { |
| 1943 | WARN_ON(!buf); |
| 1944 | sg_init_one(&sg, buf, buflen); |
| 1945 | psg = &sg; |
| 1946 | n_elem++; |
| 1947 | } |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1948 | |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1949 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
| 1950 | timeout); |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1951 | } |
| 1952 | |
| 1953 | /** |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1954 | * ata_do_simple_cmd - execute simple internal command |
| 1955 | * @dev: Device to which the command is sent |
| 1956 | * @cmd: Opcode to execute |
| 1957 | * |
| 1958 | * Execute a 'simple' command, that only consists of the opcode |
| 1959 | * 'cmd' itself, without filling any other registers |
| 1960 | * |
| 1961 | * LOCKING: |
| 1962 | * Kernel thread context (may sleep). |
| 1963 | * |
| 1964 | * RETURNS: |
| 1965 | * Zero on success, AC_ERR_* mask on failure |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1966 | */ |
Tejun Heo | 77b08fb | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1967 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1968 | { |
| 1969 | struct ata_taskfile tf; |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1970 | |
| 1971 | ata_tf_init(dev, &tf); |
| 1972 | |
| 1973 | tf.command = cmd; |
| 1974 | tf.flags |= ATA_TFLAG_DEVICE; |
| 1975 | tf.protocol = ATA_PROT_NODATA; |
| 1976 | |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1977 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1978 | } |
| 1979 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | /** |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1981 | * ata_pio_need_iordy - check if iordy needed |
| 1982 | * @adev: ATA device |
| 1983 | * |
| 1984 | * Check if the current speed of the device requires IORDY. Used |
| 1985 | * by various controllers for chip configuration. |
| 1986 | */ |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 1987 | |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1988 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
| 1989 | { |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1990 | /* Controller doesn't support IORDY. Probably a pointless check |
| 1991 | as the caller should know this */ |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1992 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1993 | return 0; |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1994 | /* PIO3 and higher it is mandatory */ |
| 1995 | if (adev->pio_mode > XFER_PIO_2) |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1996 | return 1; |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1997 | /* We turn it on when possible */ |
| 1998 | if (ata_id_has_iordy(adev->id)) |
| 1999 | return 1; |
| 2000 | return 0; |
| 2001 | } |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2002 | |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 2003 | /** |
| 2004 | * ata_pio_mask_no_iordy - Return the non IORDY mask |
| 2005 | * @adev: ATA device |
| 2006 | * |
| 2007 | * Compute the highest mode possible if we are not using iordy. Return |
| 2008 | * -1 if no iordy mode is available. |
| 2009 | */ |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 2010 | |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 2011 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
| 2012 | { |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 2013 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 2014 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 2015 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 2016 | /* Is the speed faster than the drive allows non IORDY ? */ |
| 2017 | if (pio) { |
| 2018 | /* This is cycle times not frequency - watch the logic! */ |
| 2019 | if (pio > 240) /* PIO2 is 240nS per cycle */ |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 2020 | return 3 << ATA_SHIFT_PIO; |
| 2021 | return 7 << ATA_SHIFT_PIO; |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 2022 | } |
| 2023 | } |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 2024 | return 3 << ATA_SHIFT_PIO; |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 2025 | } |
| 2026 | |
| 2027 | /** |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2028 | * ata_dev_read_id - Read ID data from the specified device |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2029 | * @dev: target device |
| 2030 | * @p_class: pointer to class of the target device (may be changed) |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2031 | * @flags: ATA_READID_* flags |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 2032 | * @id: buffer to read IDENTIFY data into |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2033 | * |
| 2034 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
| 2035 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 2036 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
| 2037 | * for pre-ATA4 drives. |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2038 | * |
Alan Cox | 50a9901 | 2007-08-08 14:27:00 +0100 | [diff] [blame] | 2039 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2040 | * now we abort if we hit that case. |
Alan Cox | 50a9901 | 2007-08-08 14:27:00 +0100 | [diff] [blame] | 2041 | * |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2042 | * LOCKING: |
| 2043 | * Kernel thread context (may sleep) |
| 2044 | * |
| 2045 | * RETURNS: |
| 2046 | * 0 on success, -errno otherwise. |
| 2047 | */ |
Tejun Heo | a9beec9 | 2006-05-31 18:27:44 +0900 | [diff] [blame] | 2048 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2049 | unsigned int flags, u16 *id) |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2050 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 2051 | struct ata_port *ap = dev->link->ap; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2052 | unsigned int class = *p_class; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2053 | struct ata_taskfile tf; |
| 2054 | unsigned int err_mask = 0; |
| 2055 | const char *reason; |
Tejun Heo | 54936f8 | 2007-05-11 14:35:29 +0200 | [diff] [blame] | 2056 | int may_fallback = 1, tried_spinup = 0; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2057 | int rc; |
| 2058 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2059 | if (ata_msg_ctl(ap)) |
Harvey Harrison | 7f5e4e8 | 2008-03-05 18:24:52 -0800 | [diff] [blame] | 2060 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2061 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2062 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2063 | retry: |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2064 | ata_tf_init(dev, &tf); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2065 | |
| 2066 | switch (class) { |
| 2067 | case ATA_DEV_ATA: |
| 2068 | tf.command = ATA_CMD_ID_ATA; |
| 2069 | break; |
| 2070 | case ATA_DEV_ATAPI: |
| 2071 | tf.command = ATA_CMD_ID_ATAPI; |
| 2072 | break; |
| 2073 | default: |
| 2074 | rc = -ENODEV; |
| 2075 | reason = "unsupported class"; |
| 2076 | goto err_out; |
| 2077 | } |
| 2078 | |
| 2079 | tf.protocol = ATA_PROT_PIO; |
Tejun Heo | 81afe89 | 2007-02-07 12:37:41 -0800 | [diff] [blame] | 2080 | |
| 2081 | /* Some devices choke if TF registers contain garbage. Make |
| 2082 | * sure those are properly initialized. |
| 2083 | */ |
| 2084 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 2085 | |
| 2086 | /* Device presence detection is unreliable on some |
| 2087 | * controllers. Always poll IDENTIFY if available. |
| 2088 | */ |
| 2089 | tf.flags |= ATA_TFLAG_POLLING; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2090 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2091 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 2092 | id, sizeof(id[0]) * ATA_ID_WORDS, 0); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2093 | if (err_mask) { |
Tejun Heo | 800b399 | 2006-12-03 21:34:13 +0900 | [diff] [blame] | 2094 | if (err_mask & AC_ERR_NODEV_HINT) { |
Tejun Heo | 1ffc151 | 2008-03-23 15:16:53 +0900 | [diff] [blame] | 2095 | ata_dev_printk(dev, KERN_DEBUG, |
| 2096 | "NODEV after polling detection\n"); |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2097 | return -ENOENT; |
| 2098 | } |
| 2099 | |
Tejun Heo | 1ffc151 | 2008-03-23 15:16:53 +0900 | [diff] [blame] | 2100 | if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { |
| 2101 | /* Device or controller might have reported |
| 2102 | * the wrong device class. Give a shot at the |
| 2103 | * other IDENTIFY if the current one is |
| 2104 | * aborted by the device. |
| 2105 | */ |
| 2106 | if (may_fallback) { |
| 2107 | may_fallback = 0; |
Tejun Heo | 54936f8 | 2007-05-11 14:35:29 +0200 | [diff] [blame] | 2108 | |
Tejun Heo | 1ffc151 | 2008-03-23 15:16:53 +0900 | [diff] [blame] | 2109 | if (class == ATA_DEV_ATA) |
| 2110 | class = ATA_DEV_ATAPI; |
| 2111 | else |
| 2112 | class = ATA_DEV_ATA; |
| 2113 | goto retry; |
| 2114 | } |
| 2115 | |
| 2116 | /* Control reaches here iff the device aborted |
| 2117 | * both flavors of IDENTIFYs which happens |
| 2118 | * sometimes with phantom devices. |
| 2119 | */ |
| 2120 | ata_dev_printk(dev, KERN_DEBUG, |
| 2121 | "both IDENTIFYs aborted, assuming NODEV\n"); |
| 2122 | return -ENOENT; |
Tejun Heo | 54936f8 | 2007-05-11 14:35:29 +0200 | [diff] [blame] | 2123 | } |
| 2124 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2125 | rc = -EIO; |
| 2126 | reason = "I/O error"; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2127 | goto err_out; |
| 2128 | } |
| 2129 | |
Tejun Heo | 54936f8 | 2007-05-11 14:35:29 +0200 | [diff] [blame] | 2130 | /* Falling back doesn't make sense if ID data was read |
| 2131 | * successfully at least once. |
| 2132 | */ |
| 2133 | may_fallback = 0; |
| 2134 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2135 | swap_buf_le16(id, ATA_ID_WORDS); |
| 2136 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2137 | /* sanity check */ |
Tejun Heo | a4f5749 | 2006-09-12 20:35:49 -0700 | [diff] [blame] | 2138 | rc = -EINVAL; |
Alan Cox | 6070068 | 2007-06-07 16:13:55 +0100 | [diff] [blame] | 2139 | reason = "device reports invalid type"; |
Tejun Heo | a4f5749 | 2006-09-12 20:35:49 -0700 | [diff] [blame] | 2140 | |
| 2141 | if (class == ATA_DEV_ATA) { |
| 2142 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) |
| 2143 | goto err_out; |
| 2144 | } else { |
| 2145 | if (ata_id_is_ata(id)) |
| 2146 | goto err_out; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2147 | } |
| 2148 | |
Mark Lord | 169439c | 2007-04-17 18:26:07 -0400 | [diff] [blame] | 2149 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
| 2150 | tried_spinup = 1; |
| 2151 | /* |
| 2152 | * Drive powered-up in standby mode, and requires a specific |
| 2153 | * SET_FEATURES spin-up subcommand before it will accept |
| 2154 | * anything other than the original IDENTIFY command. |
| 2155 | */ |
Jeff Garzik | 218f3d3 | 2007-10-25 00:33:27 -0400 | [diff] [blame] | 2156 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
Ryan Power | fb0582f9 | 2007-08-10 13:59:35 -0700 | [diff] [blame] | 2157 | if (err_mask && id[2] != 0x738c) { |
Mark Lord | 169439c | 2007-04-17 18:26:07 -0400 | [diff] [blame] | 2158 | rc = -EIO; |
| 2159 | reason = "SPINUP failed"; |
| 2160 | goto err_out; |
| 2161 | } |
| 2162 | /* |
| 2163 | * If the drive initially returned incomplete IDENTIFY info, |
| 2164 | * we now must reissue the IDENTIFY command. |
| 2165 | */ |
| 2166 | if (id[2] == 0x37c8) |
| 2167 | goto retry; |
| 2168 | } |
| 2169 | |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2170 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2171 | /* |
| 2172 | * The exact sequence expected by certain pre-ATA4 drives is: |
| 2173 | * SRST RESET |
Alan Cox | 50a9901 | 2007-08-08 14:27:00 +0100 | [diff] [blame] | 2174 | * IDENTIFY (optional in early ATA) |
| 2175 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2176 | * anything else.. |
| 2177 | * Some drives were very specific about that exact sequence. |
Alan Cox | 50a9901 | 2007-08-08 14:27:00 +0100 | [diff] [blame] | 2178 | * |
| 2179 | * Note that ATA4 says lba is mandatory so the second check |
| 2180 | * shoud never trigger. |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2181 | */ |
| 2182 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2183 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2184 | if (err_mask) { |
| 2185 | rc = -EIO; |
| 2186 | reason = "INIT_DEV_PARAMS failed"; |
| 2187 | goto err_out; |
| 2188 | } |
| 2189 | |
| 2190 | /* current CHS translation info (id[53-58]) might be |
| 2191 | * changed. reread the identify device info. |
| 2192 | */ |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2193 | flags &= ~ATA_READID_POSTRESET; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2194 | goto retry; |
| 2195 | } |
| 2196 | } |
| 2197 | |
| 2198 | *p_class = class; |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 2199 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2200 | return 0; |
| 2201 | |
| 2202 | err_out: |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 2203 | if (ata_msg_warn(ap)) |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2204 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 2205 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2206 | return rc; |
| 2207 | } |
| 2208 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2209 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2210 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 2211 | struct ata_port *ap = dev->link->ap; |
| 2212 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2213 | } |
| 2214 | |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 2215 | static void ata_dev_config_ncq(struct ata_device *dev, |
| 2216 | char *desc, size_t desc_sz) |
| 2217 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 2218 | struct ata_port *ap = dev->link->ap; |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 2219 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
| 2220 | |
| 2221 | if (!ata_id_has_ncq(dev->id)) { |
| 2222 | desc[0] = '\0'; |
| 2223 | return; |
| 2224 | } |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 2225 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 2226 | snprintf(desc, desc_sz, "NCQ (not used)"); |
| 2227 | return; |
| 2228 | } |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 2229 | if (ap->flags & ATA_FLAG_NCQ) { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2230 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 2231 | dev->flags |= ATA_DFLAG_NCQ; |
| 2232 | } |
| 2233 | |
| 2234 | if (hdepth >= ddepth) |
| 2235 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); |
| 2236 | else |
| 2237 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); |
| 2238 | } |
| 2239 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 2240 | /** |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2241 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2242 | * @dev: Target device to configure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | * |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2244 | * Configure @dev according to @dev->id. Generic and low-level |
| 2245 | * driver specific fixups are also applied. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2246 | * |
| 2247 | * LOCKING: |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2248 | * Kernel thread context (may sleep) |
| 2249 | * |
| 2250 | * RETURNS: |
| 2251 | * 0 on success, -errno otherwise |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | */ |
Tejun Heo | efdaedc | 2006-11-01 18:38:52 +0900 | [diff] [blame] | 2253 | int ata_dev_configure(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 2255 | struct ata_port *ap = dev->link->ap; |
| 2256 | struct ata_eh_context *ehc = &dev->link->eh_context; |
Tejun Heo | 6746544 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 2257 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 2258 | const u16 *id = dev->id; |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 2259 | unsigned long xfer_mask; |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2260 | char revbuf[7]; /* XYZ-99\0 */ |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 2261 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
| 2262 | char modelbuf[ATA_ID_PROD_LEN+1]; |
Brian King | e6d902a | 2006-06-28 08:30:31 -0500 | [diff] [blame] | 2263 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2265 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 2266 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
Harvey Harrison | 7f5e4e8 | 2008-03-05 18:24:52 -0800 | [diff] [blame] | 2267 | __func__); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2268 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | } |
| 2270 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2271 | if (ata_msg_probe(ap)) |
Harvey Harrison | 7f5e4e8 | 2008-03-05 18:24:52 -0800 | [diff] [blame] | 2272 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 2274 | /* set horkage */ |
| 2275 | dev->horkage |= ata_dev_blacklisted(dev); |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 2276 | ata_force_horkage(dev); |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 2277 | |
Tejun Heo | 6746544 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 2278 | /* let ACPI work its magic */ |
| 2279 | rc = ata_acpi_on_devcfg(dev); |
| 2280 | if (rc) |
| 2281 | return rc; |
Kristen Carlson Accardi | 08573a8 | 2006-11-10 16:14:47 -0800 | [diff] [blame] | 2282 | |
Tejun Heo | 05027ad | 2007-09-03 12:32:57 +0900 | [diff] [blame] | 2283 | /* massage HPA, do it early as it might change IDENTIFY data */ |
| 2284 | rc = ata_hpa_resize(dev); |
| 2285 | if (rc) |
| 2286 | return rc; |
| 2287 | |
Tejun Heo | c39f5eb | 2006-03-13 19:51:19 +0900 | [diff] [blame] | 2288 | /* print device capabilities */ |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2289 | if (ata_msg_probe(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 2290 | ata_dev_printk(dev, KERN_DEBUG, |
| 2291 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " |
| 2292 | "85:%04x 86:%04x 87:%04x 88:%04x\n", |
Harvey Harrison | 7f5e4e8 | 2008-03-05 18:24:52 -0800 | [diff] [blame] | 2293 | __func__, |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2294 | id[49], id[82], id[83], id[84], |
| 2295 | id[85], id[86], id[87], id[88]); |
Tejun Heo | c39f5eb | 2006-03-13 19:51:19 +0900 | [diff] [blame] | 2296 | |
Tejun Heo | 208a993 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 2297 | /* initialize to-be-configured parameters */ |
Tejun Heo | ea1dd4e | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 2298 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
Tejun Heo | 208a993 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 2299 | dev->max_sectors = 0; |
| 2300 | dev->cdb_len = 0; |
| 2301 | dev->n_sectors = 0; |
| 2302 | dev->cylinders = 0; |
| 2303 | dev->heads = 0; |
| 2304 | dev->sectors = 0; |
| 2305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2306 | /* |
| 2307 | * common ATA, ATAPI feature tests |
| 2308 | */ |
| 2309 | |
Tejun Heo | ff8854b | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 2310 | /* find max transfer mode; for printk only */ |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 2311 | xfer_mask = ata_id_xfermask(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2313 | if (ata_msg_probe(ap)) |
| 2314 | ata_dump_id(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2315 | |
Albert Lee | ef143d5 | 2007-06-05 13:01:33 +0800 | [diff] [blame] | 2316 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
| 2317 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, |
| 2318 | sizeof(fwrevbuf)); |
| 2319 | |
| 2320 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, |
| 2321 | sizeof(modelbuf)); |
| 2322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | /* ATA-specific feature tests */ |
| 2324 | if (dev->class == ATA_DEV_ATA) { |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2325 | if (ata_id_is_cfa(id)) { |
| 2326 | if (id[162] & 1) /* CPRM may make this media unusable */ |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 2327 | ata_dev_printk(dev, KERN_WARNING, |
| 2328 | "supports DRM functions and may " |
| 2329 | "not be fully accessable.\n"); |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2330 | snprintf(revbuf, 7, "CFA"); |
Alan Cox | ae8d4ee | 2007-11-04 22:05:49 -0500 | [diff] [blame] | 2331 | } else { |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2332 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
Alan Cox | ae8d4ee | 2007-11-04 22:05:49 -0500 | [diff] [blame] | 2333 | /* Warn the user if the device has TPM extensions */ |
| 2334 | if (ata_id_has_tpm(id)) |
| 2335 | ata_dev_printk(dev, KERN_WARNING, |
| 2336 | "supports DRM functions and may " |
| 2337 | "not be fully accessable.\n"); |
| 2338 | } |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2339 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 2340 | dev->n_sectors = ata_id_n_sectors(id); |
Tejun Heo | 2940740 | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 2341 | |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 2342 | if (dev->id[59] & 0x100) |
| 2343 | dev->multi_count = dev->id[59] & 0xff; |
| 2344 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 2345 | if (ata_id_has_lba(id)) { |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 2346 | const char *lba_desc; |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 2347 | char ncq_desc[20]; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2348 | |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 2349 | lba_desc = "LBA"; |
| 2350 | dev->flags |= ATA_DFLAG_LBA; |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 2351 | if (ata_id_has_lba48(id)) { |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2352 | dev->flags |= ATA_DFLAG_LBA48; |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 2353 | lba_desc = "LBA48"; |
Tejun Heo | 6fc49ad | 2006-11-11 20:10:45 +0900 | [diff] [blame] | 2354 | |
| 2355 | if (dev->n_sectors >= (1UL << 28) && |
| 2356 | ata_id_has_flush_ext(id)) |
| 2357 | dev->flags |= ATA_DFLAG_FLUSH_EXT; |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 2358 | } |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2359 | |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 2360 | /* config NCQ */ |
| 2361 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); |
| 2362 | |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2363 | /* print device info to dmesg */ |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 2364 | if (ata_msg_drv(ap) && print_info) { |
| 2365 | ata_dev_printk(dev, KERN_INFO, |
| 2366 | "%s: %s, %s, max %s\n", |
| 2367 | revbuf, modelbuf, fwrevbuf, |
| 2368 | ata_mode_string(xfer_mask)); |
| 2369 | ata_dev_printk(dev, KERN_INFO, |
| 2370 | "%Lu sectors, multi %u: %s %s\n", |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2371 | (unsigned long long)dev->n_sectors, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 2372 | dev->multi_count, lba_desc, ncq_desc); |
| 2373 | } |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2374 | } else { |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2375 | /* CHS */ |
| 2376 | |
| 2377 | /* Default translation */ |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 2378 | dev->cylinders = id[1]; |
| 2379 | dev->heads = id[3]; |
| 2380 | dev->sectors = id[6]; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2381 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 2382 | if (ata_id_current_chs_valid(id)) { |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2383 | /* Current CHS translation is valid. */ |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 2384 | dev->cylinders = id[54]; |
| 2385 | dev->heads = id[55]; |
| 2386 | dev->sectors = id[56]; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2387 | } |
| 2388 | |
| 2389 | /* print device info to dmesg */ |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 2390 | if (ata_msg_drv(ap) && print_info) { |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 2391 | ata_dev_printk(dev, KERN_INFO, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 2392 | "%s: %s, %s, max %s\n", |
| 2393 | revbuf, modelbuf, fwrevbuf, |
| 2394 | ata_mode_string(xfer_mask)); |
Jeff Garzik | a84471f | 2007-02-26 05:51:33 -0500 | [diff] [blame] | 2395 | ata_dev_printk(dev, KERN_INFO, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 2396 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
| 2397 | (unsigned long long)dev->n_sectors, |
| 2398 | dev->multi_count, dev->cylinders, |
| 2399 | dev->heads, dev->sectors); |
| 2400 | } |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 2401 | } |
| 2402 | |
Tejun Heo | 6e7846e | 2006-02-12 23:32:58 +0900 | [diff] [blame] | 2403 | dev->cdb_len = 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | } |
| 2405 | |
| 2406 | /* ATAPI-specific feature tests */ |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 2407 | else if (dev->class == ATA_DEV_ATAPI) { |
Tejun Heo | 854c73a | 2007-09-23 13:14:11 +0900 | [diff] [blame] | 2408 | const char *cdb_intr_string = ""; |
| 2409 | const char *atapi_an_string = ""; |
Tejun Heo | 9116300 | 2008-02-21 13:25:50 +0900 | [diff] [blame] | 2410 | const char *dma_dir_string = ""; |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 2411 | u32 sntf; |
Albert Lee | 08a556d | 2006-03-31 13:29:04 +0800 | [diff] [blame] | 2412 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 2413 | rc = atapi_cdb_len(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2414 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2415 | if (ata_msg_warn(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 2416 | ata_dev_printk(dev, KERN_WARNING, |
| 2417 | "unsupported CDB len\n"); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2418 | rc = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2419 | goto err_out_nosup; |
| 2420 | } |
Tejun Heo | 6e7846e | 2006-02-12 23:32:58 +0900 | [diff] [blame] | 2421 | dev->cdb_len = (unsigned int) rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 2423 | /* Enable ATAPI AN if both the host and device have |
| 2424 | * the support. If PMP is attached, SNTF is required |
| 2425 | * to enable ATAPI AN to discern between PHY status |
| 2426 | * changed notifications and ATAPI ANs. |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 2427 | */ |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 2428 | if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
| 2429 | (!ap->nr_pmp_links || |
| 2430 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { |
Tejun Heo | 854c73a | 2007-09-23 13:14:11 +0900 | [diff] [blame] | 2431 | unsigned int err_mask; |
| 2432 | |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 2433 | /* issue SET feature command to turn this on */ |
Jeff Garzik | 218f3d3 | 2007-10-25 00:33:27 -0400 | [diff] [blame] | 2434 | err_mask = ata_dev_set_feature(dev, |
| 2435 | SETFEATURES_SATA_ENABLE, SATA_AN); |
Tejun Heo | 854c73a | 2007-09-23 13:14:11 +0900 | [diff] [blame] | 2436 | if (err_mask) |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 2437 | ata_dev_printk(dev, KERN_ERR, |
Tejun Heo | 854c73a | 2007-09-23 13:14:11 +0900 | [diff] [blame] | 2438 | "failed to enable ATAPI AN " |
| 2439 | "(err_mask=0x%x)\n", err_mask); |
| 2440 | else { |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 2441 | dev->flags |= ATA_DFLAG_AN; |
Tejun Heo | 854c73a | 2007-09-23 13:14:11 +0900 | [diff] [blame] | 2442 | atapi_an_string = ", ATAPI AN"; |
| 2443 | } |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 2444 | } |
| 2445 | |
Albert Lee | 08a556d | 2006-03-31 13:29:04 +0800 | [diff] [blame] | 2446 | if (ata_id_cdb_intr(dev->id)) { |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 2447 | dev->flags |= ATA_DFLAG_CDB_INTR; |
Albert Lee | 08a556d | 2006-03-31 13:29:04 +0800 | [diff] [blame] | 2448 | cdb_intr_string = ", CDB intr"; |
| 2449 | } |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 2450 | |
Tejun Heo | 9116300 | 2008-02-21 13:25:50 +0900 | [diff] [blame] | 2451 | if (atapi_dmadir || atapi_id_dmadir(dev->id)) { |
| 2452 | dev->flags |= ATA_DFLAG_DMADIR; |
| 2453 | dma_dir_string = ", DMADIR"; |
| 2454 | } |
| 2455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2456 | /* print device info to dmesg */ |
Borislav Petkov | 5afc814 | 2006-06-27 14:51:25 +0200 | [diff] [blame] | 2457 | if (ata_msg_drv(ap) && print_info) |
Albert Lee | ef143d5 | 2007-06-05 13:01:33 +0800 | [diff] [blame] | 2458 | ata_dev_printk(dev, KERN_INFO, |
Tejun Heo | 9116300 | 2008-02-21 13:25:50 +0900 | [diff] [blame] | 2459 | "ATAPI: %s, %s, max %s%s%s%s\n", |
Albert Lee | ef143d5 | 2007-06-05 13:01:33 +0800 | [diff] [blame] | 2460 | modelbuf, fwrevbuf, |
Tejun Heo | 12436c3 | 2006-05-15 20:59:15 +0900 | [diff] [blame] | 2461 | ata_mode_string(xfer_mask), |
Tejun Heo | 9116300 | 2008-02-21 13:25:50 +0900 | [diff] [blame] | 2462 | cdb_intr_string, atapi_an_string, |
| 2463 | dma_dir_string); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2464 | } |
| 2465 | |
Tejun Heo | 914ed35 | 2006-11-01 18:39:55 +0900 | [diff] [blame] | 2466 | /* determine max_sectors */ |
| 2467 | dev->max_sectors = ATA_MAX_SECTORS; |
| 2468 | if (dev->flags & ATA_DFLAG_LBA48) |
| 2469 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; |
| 2470 | |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 2471 | if (!(dev->horkage & ATA_HORKAGE_IPM)) { |
| 2472 | if (ata_id_has_hipm(dev->id)) |
| 2473 | dev->flags |= ATA_DFLAG_HIPM; |
| 2474 | if (ata_id_has_dipm(dev->id)) |
| 2475 | dev->flags |= ATA_DFLAG_DIPM; |
| 2476 | } |
| 2477 | |
Alan Cox | c5038fc | 2007-10-25 14:21:16 +0100 | [diff] [blame] | 2478 | /* Limit PATA drive on SATA cable bridge transfers to udma5, |
| 2479 | 200 sectors */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2480 | if (ata_dev_knobble(dev)) { |
Borislav Petkov | 5afc814 | 2006-06-27 14:51:25 +0200 | [diff] [blame] | 2481 | if (ata_msg_drv(ap) && print_info) |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2482 | ata_dev_printk(dev, KERN_INFO, |
| 2483 | "applying bridge limits\n"); |
Tejun Heo | 5a52913 | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 2484 | dev->udma_mask &= ATA_UDMA5; |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2485 | dev->max_sectors = ATA_MAX_SECTORS; |
| 2486 | } |
| 2487 | |
Tony Battersby | f8d8e57 | 2007-10-30 11:44:35 -0400 | [diff] [blame] | 2488 | if ((dev->class == ATA_DEV_ATAPI) && |
Albert Lee | f442cd8 | 2007-11-15 10:35:47 +0900 | [diff] [blame] | 2489 | (atapi_command_packet_set(id) == TYPE_TAPE)) { |
Tony Battersby | f8d8e57 | 2007-10-30 11:44:35 -0400 | [diff] [blame] | 2490 | dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
Albert Lee | f442cd8 | 2007-11-15 10:35:47 +0900 | [diff] [blame] | 2491 | dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
| 2492 | } |
Tony Battersby | f8d8e57 | 2007-10-30 11:44:35 -0400 | [diff] [blame] | 2493 | |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 2494 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
Tejun Heo | 03ec52d | 2007-04-12 13:38:11 +0900 | [diff] [blame] | 2495 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
| 2496 | dev->max_sectors); |
Albert Lee | 18d6e9d | 2007-04-02 11:34:15 +0800 | [diff] [blame] | 2497 | |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 2498 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { |
| 2499 | dev->horkage |= ATA_HORKAGE_IPM; |
| 2500 | |
| 2501 | /* reset link pm_policy for this port to no pm */ |
| 2502 | ap->pm_policy = MAX_PERFORMANCE; |
| 2503 | } |
| 2504 | |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2505 | if (ap->ops->dev_config) |
Alan | cd0d3bb | 2007-03-02 00:56:15 +0000 | [diff] [blame] | 2506 | ap->ops->dev_config(dev); |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2507 | |
Alan Cox | c5038fc | 2007-10-25 14:21:16 +0100 | [diff] [blame] | 2508 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
| 2509 | /* Let the user know. We don't want to disallow opens for |
| 2510 | rescue purposes, or in case the vendor is just a blithering |
| 2511 | idiot. Do this after the dev_config call as some controllers |
| 2512 | with buggy firmware may want to avoid reporting false device |
| 2513 | bugs */ |
| 2514 | |
| 2515 | if (print_info) { |
| 2516 | ata_dev_printk(dev, KERN_WARNING, |
| 2517 | "Drive reports diagnostics failure. This may indicate a drive\n"); |
| 2518 | ata_dev_printk(dev, KERN_WARNING, |
| 2519 | "fault or invalid emulation. Contact drive vendor for information.\n"); |
| 2520 | } |
| 2521 | } |
| 2522 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2523 | if (ata_msg_probe(ap)) |
| 2524 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", |
Harvey Harrison | 7f5e4e8 | 2008-03-05 18:24:52 -0800 | [diff] [blame] | 2525 | __func__, ata_chk_status(ap)); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2526 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2527 | |
| 2528 | err_out_nosup: |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2529 | if (ata_msg_probe(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 2530 | ata_dev_printk(dev, KERN_DEBUG, |
Harvey Harrison | 7f5e4e8 | 2008-03-05 18:24:52 -0800 | [diff] [blame] | 2531 | "%s: EXIT, err\n", __func__); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2532 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2533 | } |
| 2534 | |
| 2535 | /** |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 2536 | * ata_cable_40wire - return 40 wire cable type |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2537 | * @ap: port |
| 2538 | * |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 2539 | * Helper method for drivers which want to hardwire 40 wire cable |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2540 | * detection. |
| 2541 | */ |
| 2542 | |
| 2543 | int ata_cable_40wire(struct ata_port *ap) |
| 2544 | { |
| 2545 | return ATA_CBL_PATA40; |
| 2546 | } |
| 2547 | |
| 2548 | /** |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 2549 | * ata_cable_80wire - return 80 wire cable type |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2550 | * @ap: port |
| 2551 | * |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 2552 | * Helper method for drivers which want to hardwire 80 wire cable |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2553 | * detection. |
| 2554 | */ |
| 2555 | |
| 2556 | int ata_cable_80wire(struct ata_port *ap) |
| 2557 | { |
| 2558 | return ATA_CBL_PATA80; |
| 2559 | } |
| 2560 | |
| 2561 | /** |
| 2562 | * ata_cable_unknown - return unknown PATA cable. |
| 2563 | * @ap: port |
| 2564 | * |
| 2565 | * Helper method for drivers which have no PATA cable detection. |
| 2566 | */ |
| 2567 | |
| 2568 | int ata_cable_unknown(struct ata_port *ap) |
| 2569 | { |
| 2570 | return ATA_CBL_PATA_UNK; |
| 2571 | } |
| 2572 | |
| 2573 | /** |
Tejun Heo | c88f90c | 2007-11-27 19:43:48 +0900 | [diff] [blame] | 2574 | * ata_cable_ignore - return ignored PATA cable. |
| 2575 | * @ap: port |
| 2576 | * |
| 2577 | * Helper method for drivers which don't use cable type to limit |
| 2578 | * transfer mode. |
| 2579 | */ |
| 2580 | int ata_cable_ignore(struct ata_port *ap) |
| 2581 | { |
| 2582 | return ATA_CBL_PATA_IGN; |
| 2583 | } |
| 2584 | |
| 2585 | /** |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2586 | * ata_cable_sata - return SATA cable type |
| 2587 | * @ap: port |
| 2588 | * |
| 2589 | * Helper method for drivers which have SATA cables |
| 2590 | */ |
| 2591 | |
| 2592 | int ata_cable_sata(struct ata_port *ap) |
| 2593 | { |
| 2594 | return ATA_CBL_SATA; |
| 2595 | } |
| 2596 | |
| 2597 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | * ata_bus_probe - Reset and probe ATA bus |
| 2599 | * @ap: Bus to probe |
| 2600 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2601 | * Master ATA bus probing function. Initiates a hardware-dependent |
| 2602 | * bus reset, then attempts to identify any devices found on |
| 2603 | * the bus. |
| 2604 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2605 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2606 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2607 | * |
| 2608 | * RETURNS: |
Tejun Heo | 96072e6 | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 2609 | * Zero on success, negative errno otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | */ |
| 2611 | |
Brian King | 8028916 | 2006-08-07 14:27:31 -0500 | [diff] [blame] | 2612 | int ata_bus_probe(struct ata_port *ap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2613 | { |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2614 | unsigned int classes[ATA_MAX_DEVICES]; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2615 | int tries[ATA_MAX_DEVICES]; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2616 | int rc; |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2617 | struct ata_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2618 | |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2619 | ata_port_probe(ap); |
| 2620 | |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2621 | ata_link_for_each_dev(dev, &ap->link) |
| 2622 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2623 | |
| 2624 | retry: |
Tejun Heo | cdeab11 | 2007-10-29 16:41:09 +0900 | [diff] [blame] | 2625 | ata_link_for_each_dev(dev, &ap->link) { |
| 2626 | /* If we issue an SRST then an ATA drive (not ATAPI) |
| 2627 | * may change configuration and be in PIO0 timing. If |
| 2628 | * we do a hard reset (or are coming from power on) |
| 2629 | * this is true for ATA or ATAPI. Until we've set a |
| 2630 | * suitable controller mode we should not touch the |
| 2631 | * bus as we may be talking too fast. |
| 2632 | */ |
| 2633 | dev->pio_mode = XFER_PIO_0; |
| 2634 | |
| 2635 | /* If the controller has a pio mode setup function |
| 2636 | * then use it to set the chipset to rights. Don't |
| 2637 | * touch the DMA setup as that will be dealt with when |
| 2638 | * configuring devices. |
| 2639 | */ |
| 2640 | if (ap->ops->set_piomode) |
| 2641 | ap->ops->set_piomode(ap, dev); |
| 2642 | } |
| 2643 | |
Tejun Heo | 2044470 | 2006-03-13 01:57:01 +0900 | [diff] [blame] | 2644 | /* reset and determine device classes */ |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 2645 | ap->ops->phy_reset(ap); |
Tejun Heo | 2061a47 | 2006-03-12 00:57:39 +0900 | [diff] [blame] | 2646 | |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2647 | ata_link_for_each_dev(dev, &ap->link) { |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 2648 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
| 2649 | dev->class != ATA_DEV_UNKNOWN) |
| 2650 | classes[dev->devno] = dev->class; |
| 2651 | else |
| 2652 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | 2044470 | 2006-03-13 01:57:01 +0900 | [diff] [blame] | 2653 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 2654 | dev->class = ATA_DEV_UNKNOWN; |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2655 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2656 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 2657 | ata_port_probe(ap); |
Tejun Heo | 2044470 | 2006-03-13 01:57:01 +0900 | [diff] [blame] | 2658 | |
Jeff Garzik | f31f0cc | 2007-03-02 17:47:28 -0500 | [diff] [blame] | 2659 | /* read IDENTIFY page and configure devices. We have to do the identify |
| 2660 | specific sequence bass-ackwards so that PDIAG- is released by |
| 2661 | the slave device */ |
| 2662 | |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2663 | ata_link_for_each_dev(dev, &ap->link) { |
| 2664 | if (tries[dev->devno]) |
| 2665 | dev->class = classes[dev->devno]; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2666 | |
Tejun Heo | e1211e3 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2667 | if (!ata_dev_enabled(dev)) |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2668 | continue; |
| 2669 | |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2670 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
| 2671 | dev->id); |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2672 | if (rc) |
| 2673 | goto fail; |
Jeff Garzik | f31f0cc | 2007-03-02 17:47:28 -0500 | [diff] [blame] | 2674 | } |
| 2675 | |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2676 | /* Now ask for the cable type as PDIAG- should have been released */ |
| 2677 | if (ap->ops->cable_detect) |
| 2678 | ap->cbl = ap->ops->cable_detect(ap); |
| 2679 | |
Alan Cox | 614fe29 | 2007-08-22 23:22:45 +0100 | [diff] [blame] | 2680 | /* We may have SATA bridge glue hiding here irrespective of the |
| 2681 | reported cable types and sensed types */ |
| 2682 | ata_link_for_each_dev(dev, &ap->link) { |
| 2683 | if (!ata_dev_enabled(dev)) |
| 2684 | continue; |
| 2685 | /* SATA drives indicate we have a bridge. We don't know which |
| 2686 | end of the link the bridge is which is a problem */ |
| 2687 | if (ata_id_is_sata(dev->id)) |
| 2688 | ap->cbl = ATA_CBL_SATA; |
| 2689 | } |
| 2690 | |
Jeff Garzik | f31f0cc | 2007-03-02 17:47:28 -0500 | [diff] [blame] | 2691 | /* After the identify sequence we can now set up the devices. We do |
| 2692 | this in the normal order so that the user doesn't get confused */ |
| 2693 | |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2694 | ata_link_for_each_dev(dev, &ap->link) { |
Jeff Garzik | f31f0cc | 2007-03-02 17:47:28 -0500 | [diff] [blame] | 2695 | if (!ata_dev_enabled(dev)) |
| 2696 | continue; |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2697 | |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 2698 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
Tejun Heo | efdaedc | 2006-11-01 18:38:52 +0900 | [diff] [blame] | 2699 | rc = ata_dev_configure(dev); |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 2700 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2701 | if (rc) |
| 2702 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | } |
| 2704 | |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2705 | /* configure transfer mode */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2706 | rc = ata_set_mode(&ap->link, &dev); |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2707 | if (rc) |
Tejun Heo | 51713d3 | 2006-04-11 22:26:29 +0900 | [diff] [blame] | 2708 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2709 | |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2710 | ata_link_for_each_dev(dev, &ap->link) |
| 2711 | if (ata_dev_enabled(dev)) |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2712 | return 0; |
Alan Cox | e35a9e0 | 2006-03-27 18:46:37 +0100 | [diff] [blame] | 2713 | |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2714 | /* no device present, disable port */ |
| 2715 | ata_port_disable(ap); |
Tejun Heo | 96072e6 | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 2716 | return -ENODEV; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2717 | |
| 2718 | fail: |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2719 | tries[dev->devno]--; |
| 2720 | |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2721 | switch (rc) { |
| 2722 | case -EINVAL: |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2723 | /* eeek, something went very wrong, give up */ |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2724 | tries[dev->devno] = 0; |
| 2725 | break; |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2726 | |
| 2727 | case -ENODEV: |
| 2728 | /* give it just one more chance */ |
| 2729 | tries[dev->devno] = min(tries[dev->devno], 1); |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2730 | case -EIO: |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2731 | if (tries[dev->devno] == 1) { |
| 2732 | /* This is the last chance, better to slow |
| 2733 | * down than lose it. |
| 2734 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2735 | sata_down_spd_limit(&ap->link); |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2736 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
| 2737 | } |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2738 | } |
| 2739 | |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2740 | if (!tries[dev->devno]) |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2741 | ata_dev_disable(dev); |
Tejun Heo | ec57375 | 2006-04-11 22:26:29 +0900 | [diff] [blame] | 2742 | |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2743 | goto retry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2744 | } |
| 2745 | |
| 2746 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2747 | * ata_port_probe - Mark port as enabled |
| 2748 | * @ap: Port for which we indicate enablement |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2749 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2750 | * Modify @ap data structure such that the system |
| 2751 | * thinks that the entire port is enabled. |
| 2752 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2753 | * LOCKING: host lock, or some other form of |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2754 | * serialization. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | */ |
| 2756 | |
| 2757 | void ata_port_probe(struct ata_port *ap) |
| 2758 | { |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2759 | ap->flags &= ~ATA_FLAG_DISABLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2760 | } |
| 2761 | |
| 2762 | /** |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2763 | * sata_print_link_status - Print SATA link status |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2764 | * @link: SATA link to printk link status about |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2765 | * |
| 2766 | * This function prints link speed and status of a SATA link. |
| 2767 | * |
| 2768 | * LOCKING: |
| 2769 | * None. |
| 2770 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2771 | void sata_print_link_status(struct ata_link *link) |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2772 | { |
Tejun Heo | 6d5f973 | 2006-04-03 00:09:41 +0900 | [diff] [blame] | 2773 | u32 sstatus, scontrol, tmp; |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2774 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2775 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2776 | return; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2777 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2778 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2779 | if (ata_link_online(link)) { |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2780 | tmp = (sstatus >> 4) & 0xf; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2781 | ata_link_printk(link, KERN_INFO, |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2782 | "SATA link up %s (SStatus %X SControl %X)\n", |
| 2783 | sata_spd_string(tmp), sstatus, scontrol); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2784 | } else { |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2785 | ata_link_printk(link, KERN_INFO, |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2786 | "SATA link down (SStatus %X SControl %X)\n", |
| 2787 | sstatus, scontrol); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2788 | } |
| 2789 | } |
| 2790 | |
| 2791 | /** |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2792 | * ata_dev_pair - return other device on cable |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2793 | * @adev: device |
| 2794 | * |
| 2795 | * Obtain the other device on the same cable, or if none is |
| 2796 | * present NULL is returned |
| 2797 | */ |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2798 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2799 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2800 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 2801 | struct ata_link *link = adev->link; |
| 2802 | struct ata_device *pair = &link->device[1 - adev->devno]; |
Tejun Heo | e1211e3 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2803 | if (!ata_dev_enabled(pair)) |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2804 | return NULL; |
| 2805 | return pair; |
| 2806 | } |
| 2807 | |
| 2808 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2809 | * ata_port_disable - Disable port. |
| 2810 | * @ap: Port to be disabled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2811 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2812 | * Modify @ap data structure such that the system |
| 2813 | * thinks that the entire port is disabled, and should |
| 2814 | * never attempt to probe or communicate with devices |
| 2815 | * on this port. |
| 2816 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2817 | * LOCKING: host lock, or some other form of |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2818 | * serialization. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2819 | */ |
| 2820 | |
| 2821 | void ata_port_disable(struct ata_port *ap) |
| 2822 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 2823 | ap->link.device[0].class = ATA_DEV_NONE; |
| 2824 | ap->link.device[1].class = ATA_DEV_NONE; |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2825 | ap->flags |= ATA_FLAG_DISABLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | } |
| 2827 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2828 | /** |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2829 | * sata_down_spd_limit - adjust SATA spd limit downward |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2830 | * @link: Link to adjust SATA spd limit for |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2831 | * |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2832 | * Adjust SATA spd limit of @link downward. Note that this |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2833 | * function only adjusts the limit. The change must be applied |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2834 | * using sata_set_spd(). |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2835 | * |
| 2836 | * LOCKING: |
| 2837 | * Inherited from caller. |
| 2838 | * |
| 2839 | * RETURNS: |
| 2840 | * 0 on success, negative errno on failure |
| 2841 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2842 | int sata_down_spd_limit(struct ata_link *link) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2843 | { |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2844 | u32 sstatus, spd, mask; |
| 2845 | int rc, highbit; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2846 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2847 | if (!sata_scr_valid(link)) |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2848 | return -EOPNOTSUPP; |
| 2849 | |
| 2850 | /* If SCR can be read, use it to determine the current SPD. |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2851 | * If not, use cached value in link->sata_spd. |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2852 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2853 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2854 | if (rc == 0) |
| 2855 | spd = (sstatus >> 4) & 0xf; |
| 2856 | else |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2857 | spd = link->sata_spd; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2858 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2859 | mask = link->sata_spd_limit; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2860 | if (mask <= 1) |
| 2861 | return -EINVAL; |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2862 | |
| 2863 | /* unconditionally mask off the highest bit */ |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2864 | highbit = fls(mask) - 1; |
| 2865 | mask &= ~(1 << highbit); |
| 2866 | |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2867 | /* Mask off all speeds higher than or equal to the current |
| 2868 | * one. Force 1.5Gbps if current SPD is not available. |
| 2869 | */ |
| 2870 | if (spd > 1) |
| 2871 | mask &= (1 << (spd - 1)) - 1; |
| 2872 | else |
| 2873 | mask &= 1; |
| 2874 | |
| 2875 | /* were we already at the bottom? */ |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2876 | if (!mask) |
| 2877 | return -EINVAL; |
| 2878 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2879 | link->sata_spd_limit = mask; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2880 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2881 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2882 | sata_spd_string(fls(mask))); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2883 | |
| 2884 | return 0; |
| 2885 | } |
| 2886 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2887 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2888 | { |
Tejun Heo | 5270222 | 2007-10-31 10:17:07 +0900 | [diff] [blame] | 2889 | struct ata_link *host_link = &link->ap->link; |
| 2890 | u32 limit, target, spd; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2891 | |
Tejun Heo | 5270222 | 2007-10-31 10:17:07 +0900 | [diff] [blame] | 2892 | limit = link->sata_spd_limit; |
| 2893 | |
| 2894 | /* Don't configure downstream link faster than upstream link. |
| 2895 | * It doesn't speed up anything and some PMPs choke on such |
| 2896 | * configuration. |
| 2897 | */ |
| 2898 | if (!ata_is_host_link(link) && host_link->sata_spd) |
| 2899 | limit &= (1 << host_link->sata_spd) - 1; |
| 2900 | |
| 2901 | if (limit == UINT_MAX) |
| 2902 | target = 0; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2903 | else |
Tejun Heo | 5270222 | 2007-10-31 10:17:07 +0900 | [diff] [blame] | 2904 | target = fls(limit); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2905 | |
| 2906 | spd = (*scontrol >> 4) & 0xf; |
Tejun Heo | 5270222 | 2007-10-31 10:17:07 +0900 | [diff] [blame] | 2907 | *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2908 | |
Tejun Heo | 5270222 | 2007-10-31 10:17:07 +0900 | [diff] [blame] | 2909 | return spd != target; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2910 | } |
| 2911 | |
| 2912 | /** |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2913 | * sata_set_spd_needed - is SATA spd configuration needed |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2914 | * @link: Link in question |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2915 | * |
| 2916 | * Test whether the spd limit in SControl matches |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2917 | * @link->sata_spd_limit. This function is used to determine |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2918 | * whether hardreset is necessary to apply SATA spd |
| 2919 | * configuration. |
| 2920 | * |
| 2921 | * LOCKING: |
| 2922 | * Inherited from caller. |
| 2923 | * |
| 2924 | * RETURNS: |
| 2925 | * 1 if SATA spd configuration is needed, 0 otherwise. |
| 2926 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2927 | int sata_set_spd_needed(struct ata_link *link) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2928 | { |
| 2929 | u32 scontrol; |
| 2930 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2931 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
Tejun Heo | db64bcf | 2007-10-31 10:17:06 +0900 | [diff] [blame] | 2932 | return 1; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2933 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2934 | return __sata_set_spd_needed(link, &scontrol); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2935 | } |
| 2936 | |
| 2937 | /** |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2938 | * sata_set_spd - set SATA spd according to spd limit |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2939 | * @link: Link to set SATA spd for |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2940 | * |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2941 | * Set SATA spd of @link according to sata_spd_limit. |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2942 | * |
| 2943 | * LOCKING: |
| 2944 | * Inherited from caller. |
| 2945 | * |
| 2946 | * RETURNS: |
| 2947 | * 0 if spd doesn't need to be changed, 1 if spd has been |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2948 | * changed. Negative errno if SCR registers are inaccessible. |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2949 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2950 | int sata_set_spd(struct ata_link *link) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2951 | { |
| 2952 | u32 scontrol; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2953 | int rc; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2954 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2955 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2956 | return rc; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2957 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2958 | if (!__sata_set_spd_needed(link, &scontrol)) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2959 | return 0; |
| 2960 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2961 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2962 | return rc; |
| 2963 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2964 | return 1; |
| 2965 | } |
| 2966 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2967 | /* |
| 2968 | * This mode timing computation functionality is ported over from |
| 2969 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik |
| 2970 | */ |
| 2971 | /* |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2972 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2973 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2974 | * for UDMA6, which is currently supported only by Maxtor drives. |
| 2975 | * |
| 2976 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2977 | */ |
| 2978 | |
| 2979 | static const struct ata_timing ata_timing[] = { |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 2980 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ |
| 2981 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, |
| 2982 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, |
| 2983 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, |
| 2984 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, |
| 2985 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, |
| 2986 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, |
| 2987 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2988 | |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 2989 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, |
| 2990 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, |
| 2991 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2992 | |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 2993 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, |
| 2994 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, |
| 2995 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2996 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 2997 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2998 | |
| 2999 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 3000 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, |
| 3001 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, |
| 3002 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, |
| 3003 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, |
| 3004 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, |
| 3005 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, |
| 3006 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3007 | |
| 3008 | { 0xFF } |
| 3009 | }; |
| 3010 | |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 3011 | #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
| 3012 | #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3013 | |
| 3014 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) |
| 3015 | { |
| 3016 | q->setup = EZ(t->setup * 1000, T); |
| 3017 | q->act8b = EZ(t->act8b * 1000, T); |
| 3018 | q->rec8b = EZ(t->rec8b * 1000, T); |
| 3019 | q->cyc8b = EZ(t->cyc8b * 1000, T); |
| 3020 | q->active = EZ(t->active * 1000, T); |
| 3021 | q->recover = EZ(t->recover * 1000, T); |
| 3022 | q->cycle = EZ(t->cycle * 1000, T); |
| 3023 | q->udma = EZ(t->udma * 1000, UT); |
| 3024 | } |
| 3025 | |
| 3026 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, |
| 3027 | struct ata_timing *m, unsigned int what) |
| 3028 | { |
| 3029 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); |
| 3030 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); |
| 3031 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); |
| 3032 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); |
| 3033 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); |
| 3034 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); |
| 3035 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); |
| 3036 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); |
| 3037 | } |
| 3038 | |
Tejun Heo | 6357357 | 2007-11-27 19:43:39 +0900 | [diff] [blame] | 3039 | const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3040 | { |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 3041 | const struct ata_timing *t = ata_timing; |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3042 | |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 3043 | while (xfer_mode > t->mode) |
| 3044 | t++; |
| 3045 | |
| 3046 | if (xfer_mode == t->mode) |
| 3047 | return t; |
| 3048 | return NULL; |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3049 | } |
| 3050 | |
| 3051 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, |
| 3052 | struct ata_timing *t, int T, int UT) |
| 3053 | { |
| 3054 | const struct ata_timing *s; |
| 3055 | struct ata_timing p; |
| 3056 | |
| 3057 | /* |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 3058 | * Find the mode. |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 3059 | */ |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3060 | |
| 3061 | if (!(s = ata_timing_find_mode(speed))) |
| 3062 | return -EINVAL; |
| 3063 | |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 3064 | memcpy(t, s, sizeof(*s)); |
| 3065 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3066 | /* |
| 3067 | * If the drive is an EIDE drive, it can tell us it needs extended |
| 3068 | * PIO/MW_DMA cycle timing. |
| 3069 | */ |
| 3070 | |
| 3071 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ |
| 3072 | memset(&p, 0, sizeof(p)); |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 3073 | if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3074 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
| 3075 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 3076 | } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3077 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
| 3078 | } |
| 3079 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); |
| 3080 | } |
| 3081 | |
| 3082 | /* |
| 3083 | * Convert the timing to bus clock counts. |
| 3084 | */ |
| 3085 | |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 3086 | ata_timing_quantize(t, t, T, UT); |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3087 | |
| 3088 | /* |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 3089 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
| 3090 | * S.M.A.R.T * and some other commands. We have to ensure that the |
| 3091 | * DMA cycle timing is slower/equal than the fastest PIO timing. |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3092 | */ |
| 3093 | |
Alan | fd3367af | 2006-12-07 12:41:18 +0000 | [diff] [blame] | 3094 | if (speed > XFER_PIO_6) { |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3095 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
| 3096 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); |
| 3097 | } |
| 3098 | |
| 3099 | /* |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 3100 | * Lengthen active & recovery time so that cycle time is correct. |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3101 | */ |
| 3102 | |
| 3103 | if (t->act8b + t->rec8b < t->cyc8b) { |
| 3104 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; |
| 3105 | t->rec8b = t->cyc8b - t->act8b; |
| 3106 | } |
| 3107 | |
| 3108 | if (t->active + t->recover < t->cycle) { |
| 3109 | t->active += (t->cycle - (t->active + t->recover)) / 2; |
| 3110 | t->recover = t->cycle - t->active; |
| 3111 | } |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 3112 | |
Alan Cox | 4f701d1 | 2007-04-23 11:55:36 +0100 | [diff] [blame] | 3113 | /* In a few cases quantisation may produce enough errors to |
| 3114 | leave t->cycle too low for the sum of active and recovery |
| 3115 | if so we must correct this */ |
| 3116 | if (t->active + t->recover > t->cycle) |
| 3117 | t->cycle = t->active + t->recover; |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 3118 | |
| 3119 | return 0; |
| 3120 | } |
| 3121 | |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3122 | /** |
Tejun Heo | a0f79b9 | 2007-12-18 16:33:05 +0900 | [diff] [blame] | 3123 | * ata_timing_cycle2mode - find xfer mode for the specified cycle duration |
| 3124 | * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. |
| 3125 | * @cycle: cycle duration in ns |
| 3126 | * |
| 3127 | * Return matching xfer mode for @cycle. The returned mode is of |
| 3128 | * the transfer type specified by @xfer_shift. If @cycle is too |
| 3129 | * slow for @xfer_shift, 0xff is returned. If @cycle is faster |
| 3130 | * than the fastest known mode, the fasted mode is returned. |
| 3131 | * |
| 3132 | * LOCKING: |
| 3133 | * None. |
| 3134 | * |
| 3135 | * RETURNS: |
| 3136 | * Matching xfer_mode, 0xff if no match found. |
| 3137 | */ |
| 3138 | u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) |
| 3139 | { |
| 3140 | u8 base_mode = 0xff, last_mode = 0xff; |
| 3141 | const struct ata_xfer_ent *ent; |
| 3142 | const struct ata_timing *t; |
| 3143 | |
| 3144 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| 3145 | if (ent->shift == xfer_shift) |
| 3146 | base_mode = ent->base; |
| 3147 | |
| 3148 | for (t = ata_timing_find_mode(base_mode); |
| 3149 | t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { |
| 3150 | unsigned short this_cycle; |
| 3151 | |
| 3152 | switch (xfer_shift) { |
| 3153 | case ATA_SHIFT_PIO: |
| 3154 | case ATA_SHIFT_MWDMA: |
| 3155 | this_cycle = t->cycle; |
| 3156 | break; |
| 3157 | case ATA_SHIFT_UDMA: |
| 3158 | this_cycle = t->udma; |
| 3159 | break; |
| 3160 | default: |
| 3161 | return 0xff; |
| 3162 | } |
| 3163 | |
| 3164 | if (cycle > this_cycle) |
| 3165 | break; |
| 3166 | |
| 3167 | last_mode = t->mode; |
| 3168 | } |
| 3169 | |
| 3170 | return last_mode; |
| 3171 | } |
| 3172 | |
| 3173 | /** |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3174 | * ata_down_xfermask_limit - adjust dev xfer masks downward |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3175 | * @dev: Device to adjust xfer masks |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3176 | * @sel: ATA_DNXFER_* selector |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3177 | * |
| 3178 | * Adjust xfer masks of @dev downward. Note that this function |
| 3179 | * does not apply the change. Invoking ata_set_mode() afterwards |
| 3180 | * will apply the limit. |
| 3181 | * |
| 3182 | * LOCKING: |
| 3183 | * Inherited from caller. |
| 3184 | * |
| 3185 | * RETURNS: |
| 3186 | * 0 on success, negative errno on failure |
| 3187 | */ |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3188 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3189 | { |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3190 | char buf[32]; |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 3191 | unsigned long orig_mask, xfer_mask; |
| 3192 | unsigned long pio_mask, mwdma_mask, udma_mask; |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3193 | int quiet, highbit; |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3194 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3195 | quiet = !!(sel & ATA_DNXFER_QUIET); |
| 3196 | sel &= ~ATA_DNXFER_QUIET; |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3197 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3198 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
| 3199 | dev->mwdma_mask, |
| 3200 | dev->udma_mask); |
| 3201 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3202 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3203 | switch (sel) { |
| 3204 | case ATA_DNXFER_PIO: |
| 3205 | highbit = fls(pio_mask) - 1; |
| 3206 | pio_mask &= ~(1 << highbit); |
| 3207 | break; |
| 3208 | |
| 3209 | case ATA_DNXFER_DMA: |
| 3210 | if (udma_mask) { |
| 3211 | highbit = fls(udma_mask) - 1; |
| 3212 | udma_mask &= ~(1 << highbit); |
| 3213 | if (!udma_mask) |
| 3214 | return -ENOENT; |
| 3215 | } else if (mwdma_mask) { |
| 3216 | highbit = fls(mwdma_mask) - 1; |
| 3217 | mwdma_mask &= ~(1 << highbit); |
| 3218 | if (!mwdma_mask) |
| 3219 | return -ENOENT; |
| 3220 | } |
| 3221 | break; |
| 3222 | |
| 3223 | case ATA_DNXFER_40C: |
| 3224 | udma_mask &= ATA_UDMA_MASK_40C; |
| 3225 | break; |
| 3226 | |
| 3227 | case ATA_DNXFER_FORCE_PIO0: |
| 3228 | pio_mask &= 1; |
| 3229 | case ATA_DNXFER_FORCE_PIO: |
| 3230 | mwdma_mask = 0; |
| 3231 | udma_mask = 0; |
| 3232 | break; |
| 3233 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3234 | default: |
| 3235 | BUG(); |
| 3236 | } |
| 3237 | |
| 3238 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
| 3239 | |
| 3240 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) |
| 3241 | return -ENOENT; |
| 3242 | |
| 3243 | if (!quiet) { |
| 3244 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) |
| 3245 | snprintf(buf, sizeof(buf), "%s:%s", |
| 3246 | ata_mode_string(xfer_mask), |
| 3247 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); |
| 3248 | else |
| 3249 | snprintf(buf, sizeof(buf), "%s", |
| 3250 | ata_mode_string(xfer_mask)); |
| 3251 | |
| 3252 | ata_dev_printk(dev, KERN_WARNING, |
| 3253 | "limiting speed to %s\n", buf); |
| 3254 | } |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3255 | |
| 3256 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, |
| 3257 | &dev->udma_mask); |
| 3258 | |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3259 | return 0; |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 3260 | } |
| 3261 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3262 | static int ata_dev_set_mode(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3263 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 3264 | struct ata_eh_context *ehc = &dev->link->eh_context; |
Tejun Heo | 4055dee | 2008-02-07 10:34:08 +0900 | [diff] [blame] | 3265 | const char *dev_err_whine = ""; |
| 3266 | int ign_dev_err = 0; |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3267 | unsigned int err_mask; |
| 3268 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3269 | |
Tejun Heo | e838460 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 3270 | dev->flags &= ~ATA_DFLAG_PIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3271 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
| 3272 | dev->flags |= ATA_DFLAG_PIO; |
| 3273 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3274 | err_mask = ata_dev_set_xfermode(dev); |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 3275 | |
Tejun Heo | 4055dee | 2008-02-07 10:34:08 +0900 | [diff] [blame] | 3276 | if (err_mask & ~AC_ERR_DEV) |
| 3277 | goto fail; |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 3278 | |
Tejun Heo | 4055dee | 2008-02-07 10:34:08 +0900 | [diff] [blame] | 3279 | /* revalidate */ |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 3280 | ehc->i.flags |= ATA_EHI_POST_SETMODE; |
Tejun Heo | 422c9da | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3281 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 3282 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; |
Tejun Heo | 5eb45c0 | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 3283 | if (rc) |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3284 | return rc; |
Tejun Heo | 48a8a14 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3285 | |
Tejun Heo | 4055dee | 2008-02-07 10:34:08 +0900 | [diff] [blame] | 3286 | /* Old CFA may refuse this command, which is just fine */ |
| 3287 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) |
| 3288 | ign_dev_err = 1; |
| 3289 | |
| 3290 | /* Some very old devices and some bad newer ones fail any kind of |
| 3291 | SET_XFERMODE request but support PIO0-2 timings and no IORDY */ |
| 3292 | if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && |
| 3293 | dev->pio_mode <= XFER_PIO_2) |
| 3294 | ign_dev_err = 1; |
| 3295 | |
| 3296 | /* Early MWDMA devices do DMA but don't allow DMA mode setting. |
| 3297 | Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ |
| 3298 | if (dev->xfer_shift == ATA_SHIFT_MWDMA && |
| 3299 | dev->dma_mode == XFER_MW_DMA_0 && |
| 3300 | (dev->id[63] >> 8) & 1) |
| 3301 | ign_dev_err = 1; |
| 3302 | |
| 3303 | /* if the device is actually configured correctly, ignore dev err */ |
| 3304 | if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) |
| 3305 | ign_dev_err = 1; |
| 3306 | |
| 3307 | if (err_mask & AC_ERR_DEV) { |
| 3308 | if (!ign_dev_err) |
| 3309 | goto fail; |
| 3310 | else |
| 3311 | dev_err_whine = " (device error ignored)"; |
| 3312 | } |
| 3313 | |
Tejun Heo | 23e71c3 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3314 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
| 3315 | dev->xfer_shift, (int)dev->xfer_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3316 | |
Tejun Heo | 4055dee | 2008-02-07 10:34:08 +0900 | [diff] [blame] | 3317 | ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", |
| 3318 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), |
| 3319 | dev_err_whine); |
| 3320 | |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3321 | return 0; |
Tejun Heo | 4055dee | 2008-02-07 10:34:08 +0900 | [diff] [blame] | 3322 | |
| 3323 | fail: |
| 3324 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " |
| 3325 | "(err_mask=0x%x)\n", err_mask); |
| 3326 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3327 | } |
| 3328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3329 | /** |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 3330 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3331 | * @link: link on which timings will be programmed |
Joe Perches | 1967b7f | 2008-02-03 17:08:11 +0200 | [diff] [blame] | 3332 | * @r_failed_dev: out parameter for failed device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3333 | * |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 3334 | * Standard implementation of the function used to tune and set |
| 3335 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
| 3336 | * ata_dev_set_mode() fails, pointer to the failing device is |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3337 | * returned in @r_failed_dev. |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 3338 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3339 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3340 | * PCI/etc. bus probe sem. |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3341 | * |
| 3342 | * RETURNS: |
| 3343 | * 0 on success, negative errno otherwise |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3344 | */ |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 3345 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3346 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3347 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3348 | struct ata_port *ap = link->ap; |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3349 | struct ata_device *dev; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3350 | int rc = 0, used_dma = 0, found = 0; |
Tejun Heo | 3adcebb | 2006-05-15 20:57:37 +0900 | [diff] [blame] | 3351 | |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3352 | /* step 1: calculate xfer_mask */ |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3353 | ata_link_for_each_dev(dev, link) { |
Tejun Heo | 7dc951a | 2007-11-27 19:43:42 +0900 | [diff] [blame] | 3354 | unsigned long pio_mask, dma_mask; |
Alan Cox | b3a7060 | 2007-10-02 12:38:26 -0400 | [diff] [blame] | 3355 | unsigned int mode_mask; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3356 | |
Tejun Heo | e1211e3 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3357 | if (!ata_dev_enabled(dev)) |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3358 | continue; |
| 3359 | |
Alan Cox | b3a7060 | 2007-10-02 12:38:26 -0400 | [diff] [blame] | 3360 | mode_mask = ATA_DMA_MASK_ATA; |
| 3361 | if (dev->class == ATA_DEV_ATAPI) |
| 3362 | mode_mask = ATA_DMA_MASK_ATAPI; |
| 3363 | else if (ata_id_is_cfa(dev->id)) |
| 3364 | mode_mask = ATA_DMA_MASK_CFA; |
| 3365 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3366 | ata_dev_xfermask(dev); |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 3367 | ata_force_xfermask(dev); |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3368 | |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 3369 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
| 3370 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); |
Alan Cox | b3a7060 | 2007-10-02 12:38:26 -0400 | [diff] [blame] | 3371 | |
| 3372 | if (libata_dma_mask & mode_mask) |
| 3373 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); |
| 3374 | else |
| 3375 | dma_mask = 0; |
| 3376 | |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 3377 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
| 3378 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 3379 | |
Tejun Heo | 4f65977 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3380 | found = 1; |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 3381 | if (dev->dma_mode != 0xff) |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 3382 | used_dma = 1; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3383 | } |
Tejun Heo | 4f65977 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3384 | if (!found) |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3385 | goto out; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3386 | |
| 3387 | /* step 2: always set host PIO timings */ |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3388 | ata_link_for_each_dev(dev, link) { |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3389 | if (!ata_dev_enabled(dev)) |
| 3390 | continue; |
| 3391 | |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 3392 | if (dev->pio_mode == 0xff) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3393 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3394 | rc = -EINVAL; |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3395 | goto out; |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3396 | } |
| 3397 | |
| 3398 | dev->xfer_mode = dev->pio_mode; |
| 3399 | dev->xfer_shift = ATA_SHIFT_PIO; |
| 3400 | if (ap->ops->set_piomode) |
| 3401 | ap->ops->set_piomode(ap, dev); |
| 3402 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3403 | |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3404 | /* step 3: set host DMA timings */ |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3405 | ata_link_for_each_dev(dev, link) { |
Tejun Heo | 70cd071 | 2007-11-27 19:43:40 +0900 | [diff] [blame] | 3406 | if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff) |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3407 | continue; |
| 3408 | |
| 3409 | dev->xfer_mode = dev->dma_mode; |
| 3410 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); |
| 3411 | if (ap->ops->set_dmamode) |
| 3412 | ap->ops->set_dmamode(ap, dev); |
| 3413 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3414 | |
| 3415 | /* step 4: update devices' xfer mode */ |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3416 | ata_link_for_each_dev(dev, link) { |
Alan | 18d90de | 2007-01-24 11:42:38 +0000 | [diff] [blame] | 3417 | /* don't update suspended devices' xfer mode */ |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 3418 | if (!ata_dev_enabled(dev)) |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3419 | continue; |
| 3420 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3421 | rc = ata_dev_set_mode(dev); |
Tejun Heo | 5bbc53f | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 3422 | if (rc) |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3423 | goto out; |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3424 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3425 | |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3426 | /* Record simplex status. If we selected DMA then the other |
| 3427 | * host channels are not permitted to do so. |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 3428 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3429 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
Alan | 032af1c | 2007-03-01 17:36:46 +0000 | [diff] [blame] | 3430 | ap->host->simplex_claimed = ap; |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 3431 | |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3432 | out: |
| 3433 | if (rc) |
| 3434 | *r_failed_dev = dev; |
| 3435 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3436 | } |
| 3437 | |
| 3438 | /** |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 3439 | * ata_tf_to_host - issue ATA taskfile to host controller |
| 3440 | * @ap: port to which command is being issued |
| 3441 | * @tf: ATA taskfile register set |
| 3442 | * |
| 3443 | * Issues ATA taskfile register set to ATA host controller, |
| 3444 | * with proper synchronization with interrupt handler and |
| 3445 | * other threads. |
| 3446 | * |
| 3447 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3448 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 3449 | */ |
| 3450 | |
| 3451 | static inline void ata_tf_to_host(struct ata_port *ap, |
| 3452 | const struct ata_taskfile *tf) |
| 3453 | { |
| 3454 | ap->ops->tf_load(ap, tf); |
| 3455 | ap->ops->exec_command(ap, tf); |
| 3456 | } |
| 3457 | |
| 3458 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3459 | * ata_busy_sleep - sleep until BSY clears, or timeout |
| 3460 | * @ap: port containing status register to be polled |
| 3461 | * @tmout_pat: impatience timeout |
| 3462 | * @tmout: overall timeout |
| 3463 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 3464 | * Sleep until ATA Status register bit BSY clears, |
| 3465 | * or a timeout occurs. |
| 3466 | * |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 3467 | * LOCKING: |
| 3468 | * Kernel thread context (may sleep). |
| 3469 | * |
| 3470 | * RETURNS: |
| 3471 | * 0 on success, -errno otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3472 | */ |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 3473 | int ata_busy_sleep(struct ata_port *ap, |
| 3474 | unsigned long tmout_pat, unsigned long tmout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3475 | { |
| 3476 | unsigned long timer_start, timeout; |
| 3477 | u8 status; |
| 3478 | |
| 3479 | status = ata_busy_wait(ap, ATA_BUSY, 300); |
| 3480 | timer_start = jiffies; |
| 3481 | timeout = timer_start + tmout_pat; |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 3482 | while (status != 0xff && (status & ATA_BUSY) && |
| 3483 | time_before(jiffies, timeout)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3484 | msleep(50); |
| 3485 | status = ata_busy_wait(ap, ATA_BUSY, 3); |
| 3486 | } |
| 3487 | |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 3488 | if (status != 0xff && (status & ATA_BUSY)) |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3489 | ata_port_printk(ap, KERN_WARNING, |
Jeff Garzik | 35aa7a4 | 2006-09-28 06:50:24 -0400 | [diff] [blame] | 3490 | "port is slow to respond, please be patient " |
| 3491 | "(Status 0x%x)\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3492 | |
| 3493 | timeout = timer_start + tmout; |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 3494 | while (status != 0xff && (status & ATA_BUSY) && |
| 3495 | time_before(jiffies, timeout)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3496 | msleep(50); |
| 3497 | status = ata_chk_status(ap); |
| 3498 | } |
| 3499 | |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 3500 | if (status == 0xff) |
| 3501 | return -ENODEV; |
| 3502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3503 | if (status & ATA_BUSY) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3504 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
Jeff Garzik | 35aa7a4 | 2006-09-28 06:50:24 -0400 | [diff] [blame] | 3505 | "(%lu secs, Status 0x%x)\n", |
| 3506 | tmout / HZ, status); |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 3507 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3508 | } |
| 3509 | |
| 3510 | return 0; |
| 3511 | } |
| 3512 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3513 | /** |
Tejun Heo | 88ff6ea | 2007-10-16 14:21:24 -0700 | [diff] [blame] | 3514 | * ata_wait_after_reset - wait before checking status after reset |
| 3515 | * @ap: port containing status register to be polled |
| 3516 | * @deadline: deadline jiffies for the operation |
| 3517 | * |
| 3518 | * After reset, we need to pause a while before reading status. |
| 3519 | * Also, certain combination of controller and device report 0xff |
| 3520 | * for some duration (e.g. until SATA PHY is up and running) |
| 3521 | * which is interpreted as empty port in ATA world. This |
| 3522 | * function also waits for such devices to get out of 0xff |
| 3523 | * status. |
| 3524 | * |
| 3525 | * LOCKING: |
| 3526 | * Kernel thread context (may sleep). |
| 3527 | */ |
| 3528 | void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline) |
| 3529 | { |
| 3530 | unsigned long until = jiffies + ATA_TMOUT_FF_WAIT; |
| 3531 | |
| 3532 | if (time_before(until, deadline)) |
| 3533 | deadline = until; |
| 3534 | |
| 3535 | /* Spec mandates ">= 2ms" before checking status. We wait |
| 3536 | * 150ms, because that was the magic delay used for ATAPI |
| 3537 | * devices in Hale Landis's ATADRVR, for the period of time |
| 3538 | * between when the ATA command register is written, and then |
| 3539 | * status is checked. Because waiting for "a while" before |
| 3540 | * checking status is fine, post SRST, we perform this magic |
| 3541 | * delay here as well. |
| 3542 | * |
| 3543 | * Old drivers/ide uses the 2mS rule and then waits for ready. |
| 3544 | */ |
| 3545 | msleep(150); |
| 3546 | |
| 3547 | /* Wait for 0xff to clear. Some SATA devices take a long time |
| 3548 | * to clear 0xff after reset. For example, HHD424020F7SV00 |
| 3549 | * iVDR needs >= 800ms while. Quantum GoVault needs even more |
| 3550 | * than that. |
Tejun Heo | 1974e20 | 2007-11-08 11:20:18 +0900 | [diff] [blame] | 3551 | * |
| 3552 | * Note that some PATA controllers (pata_ali) explode if |
| 3553 | * status register is read more than once when there's no |
| 3554 | * device attached. |
Tejun Heo | 88ff6ea | 2007-10-16 14:21:24 -0700 | [diff] [blame] | 3555 | */ |
Tejun Heo | 1974e20 | 2007-11-08 11:20:18 +0900 | [diff] [blame] | 3556 | if (ap->flags & ATA_FLAG_SATA) { |
| 3557 | while (1) { |
| 3558 | u8 status = ata_chk_status(ap); |
Tejun Heo | 88ff6ea | 2007-10-16 14:21:24 -0700 | [diff] [blame] | 3559 | |
Tejun Heo | 1974e20 | 2007-11-08 11:20:18 +0900 | [diff] [blame] | 3560 | if (status != 0xff || time_after(jiffies, deadline)) |
| 3561 | return; |
Tejun Heo | 88ff6ea | 2007-10-16 14:21:24 -0700 | [diff] [blame] | 3562 | |
Tejun Heo | 1974e20 | 2007-11-08 11:20:18 +0900 | [diff] [blame] | 3563 | msleep(50); |
| 3564 | } |
Tejun Heo | 88ff6ea | 2007-10-16 14:21:24 -0700 | [diff] [blame] | 3565 | } |
| 3566 | } |
| 3567 | |
| 3568 | /** |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3569 | * ata_wait_ready - sleep until BSY clears, or timeout |
| 3570 | * @ap: port containing status register to be polled |
| 3571 | * @deadline: deadline jiffies for the operation |
| 3572 | * |
| 3573 | * Sleep until ATA Status register bit BSY clears, or timeout |
| 3574 | * occurs. |
| 3575 | * |
| 3576 | * LOCKING: |
| 3577 | * Kernel thread context (may sleep). |
| 3578 | * |
| 3579 | * RETURNS: |
| 3580 | * 0 on success, -errno otherwise. |
| 3581 | */ |
| 3582 | int ata_wait_ready(struct ata_port *ap, unsigned long deadline) |
| 3583 | { |
| 3584 | unsigned long start = jiffies; |
| 3585 | int warned = 0; |
| 3586 | |
| 3587 | while (1) { |
| 3588 | u8 status = ata_chk_status(ap); |
| 3589 | unsigned long now = jiffies; |
| 3590 | |
| 3591 | if (!(status & ATA_BUSY)) |
| 3592 | return 0; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3593 | if (!ata_link_online(&ap->link) && status == 0xff) |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3594 | return -ENODEV; |
| 3595 | if (time_after(now, deadline)) |
| 3596 | return -EBUSY; |
| 3597 | |
| 3598 | if (!warned && time_after(now, start + 5 * HZ) && |
| 3599 | (deadline - now > 3 * HZ)) { |
| 3600 | ata_port_printk(ap, KERN_WARNING, |
| 3601 | "port is slow to respond, please be patient " |
| 3602 | "(Status 0x%x)\n", status); |
| 3603 | warned = 1; |
| 3604 | } |
| 3605 | |
| 3606 | msleep(50); |
| 3607 | } |
| 3608 | } |
| 3609 | |
| 3610 | static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, |
| 3611 | unsigned long deadline) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3612 | { |
| 3613 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 3614 | unsigned int dev0 = devmask & (1 << 0); |
| 3615 | unsigned int dev1 = devmask & (1 << 1); |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3616 | int rc, ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3617 | |
| 3618 | /* if device 0 was found in ata_devchk, wait for its |
| 3619 | * BSY bit to clear |
| 3620 | */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3621 | if (dev0) { |
| 3622 | rc = ata_wait_ready(ap, deadline); |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3623 | if (rc) { |
| 3624 | if (rc != -ENODEV) |
| 3625 | return rc; |
| 3626 | ret = rc; |
| 3627 | } |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3628 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3629 | |
Tejun Heo | e141d99 | 2007-06-10 14:26:20 +0900 | [diff] [blame] | 3630 | /* if device 1 was found in ata_devchk, wait for register |
| 3631 | * access briefly, then wait for BSY to clear. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3632 | */ |
Tejun Heo | e141d99 | 2007-06-10 14:26:20 +0900 | [diff] [blame] | 3633 | if (dev1) { |
| 3634 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3635 | |
| 3636 | ap->ops->dev_select(ap, 1); |
Tejun Heo | e141d99 | 2007-06-10 14:26:20 +0900 | [diff] [blame] | 3637 | |
| 3638 | /* Wait for register access. Some ATAPI devices fail |
| 3639 | * to set nsect/lbal after reset, so don't waste too |
| 3640 | * much time on it. We're gonna wait for !BSY anyway. |
| 3641 | */ |
| 3642 | for (i = 0; i < 2; i++) { |
| 3643 | u8 nsect, lbal; |
| 3644 | |
| 3645 | nsect = ioread8(ioaddr->nsect_addr); |
| 3646 | lbal = ioread8(ioaddr->lbal_addr); |
| 3647 | if ((nsect == 1) && (lbal == 1)) |
| 3648 | break; |
| 3649 | msleep(50); /* give drive a breather */ |
| 3650 | } |
| 3651 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3652 | rc = ata_wait_ready(ap, deadline); |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3653 | if (rc) { |
| 3654 | if (rc != -ENODEV) |
| 3655 | return rc; |
| 3656 | ret = rc; |
| 3657 | } |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3658 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | |
| 3660 | /* is all this really necessary? */ |
| 3661 | ap->ops->dev_select(ap, 0); |
| 3662 | if (dev1) |
| 3663 | ap->ops->dev_select(ap, 1); |
| 3664 | if (dev0) |
| 3665 | ap->ops->dev_select(ap, 0); |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3666 | |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3667 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3668 | } |
| 3669 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3670 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, |
| 3671 | unsigned long deadline) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3672 | { |
| 3673 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 3674 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 3675 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3676 | |
| 3677 | /* software reset. causes dev0 to be selected */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 3678 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
| 3679 | udelay(20); /* FIXME: flush */ |
| 3680 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); |
| 3681 | udelay(20); /* FIXME: flush */ |
| 3682 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3683 | |
Tejun Heo | 88ff6ea | 2007-10-16 14:21:24 -0700 | [diff] [blame] | 3684 | /* wait a while before checking status */ |
| 3685 | ata_wait_after_reset(ap, deadline); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3686 | |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 3687 | /* Before we perform post reset processing we want to see if |
Tejun Heo | 298a41c | 2006-03-25 02:58:13 +0900 | [diff] [blame] | 3688 | * the bus shows 0xFF because the odd clown forgets the D7 |
| 3689 | * pulldown resistor. |
| 3690 | */ |
Alan Cox | 150981b | 2007-10-23 16:50:02 +0100 | [diff] [blame] | 3691 | if (ata_chk_status(ap) == 0xFF) |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3692 | return -ENODEV; |
Alan Cox | 09c7ad7 | 2006-03-22 15:52:40 +0000 | [diff] [blame] | 3693 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3694 | return ata_bus_post_reset(ap, devmask, deadline); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3695 | } |
| 3696 | |
| 3697 | /** |
| 3698 | * ata_bus_reset - reset host port and associated ATA channel |
| 3699 | * @ap: port to reset |
| 3700 | * |
| 3701 | * This is typically the first time we actually start issuing |
| 3702 | * commands to the ATA channel. We wait for BSY to clear, then |
| 3703 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its |
| 3704 | * result. Determine what devices, if any, are on the channel |
| 3705 | * by looking at the device 0/1 error register. Look at the signature |
| 3706 | * stored in each device's taskfile registers, to determine if |
| 3707 | * the device is ATA or ATAPI. |
| 3708 | * |
| 3709 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3710 | * PCI/etc. bus probe sem. |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3711 | * Obtains host lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3712 | * |
| 3713 | * SIDE EFFECTS: |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 3714 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3715 | */ |
| 3716 | |
| 3717 | void ata_bus_reset(struct ata_port *ap) |
| 3718 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 3719 | struct ata_device *device = ap->link.device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3720 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 3721 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
| 3722 | u8 err; |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 3723 | unsigned int dev0, dev1 = 0, devmask = 0; |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3724 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3725 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 3726 | DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3727 | |
| 3728 | /* determine if device 0/1 are present */ |
| 3729 | if (ap->flags & ATA_FLAG_SATA_RESET) |
| 3730 | dev0 = 1; |
| 3731 | else { |
| 3732 | dev0 = ata_devchk(ap, 0); |
| 3733 | if (slave_possible) |
| 3734 | dev1 = ata_devchk(ap, 1); |
| 3735 | } |
| 3736 | |
| 3737 | if (dev0) |
| 3738 | devmask |= (1 << 0); |
| 3739 | if (dev1) |
| 3740 | devmask |= (1 << 1); |
| 3741 | |
| 3742 | /* select device 0 again */ |
| 3743 | ap->ops->dev_select(ap, 0); |
| 3744 | |
| 3745 | /* issue bus reset */ |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3746 | if (ap->flags & ATA_FLAG_SRST) { |
| 3747 | rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); |
| 3748 | if (rc && rc != -ENODEV) |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 3749 | goto err_out; |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3750 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3751 | |
| 3752 | /* |
| 3753 | * determine by signature whether we have ATA or ATAPI devices |
| 3754 | */ |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 3755 | device[0].class = ata_dev_try_classify(&device[0], dev0, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3756 | if ((slave_possible) && (err != 0x81)) |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 3757 | device[1].class = ata_dev_try_classify(&device[1], dev1, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3758 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3759 | /* is double-select really necessary? */ |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 3760 | if (device[1].class != ATA_DEV_NONE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3761 | ap->ops->dev_select(ap, 1); |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 3762 | if (device[0].class != ATA_DEV_NONE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3763 | ap->ops->dev_select(ap, 0); |
| 3764 | |
| 3765 | /* if no devices were detected, disable this port */ |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 3766 | if ((device[0].class == ATA_DEV_NONE) && |
| 3767 | (device[1].class == ATA_DEV_NONE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3768 | goto err_out; |
| 3769 | |
| 3770 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { |
| 3771 | /* set up device control for ATA_FLAG_SATA_RESET */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 3772 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3773 | } |
| 3774 | |
| 3775 | DPRINTK("EXIT\n"); |
| 3776 | return; |
| 3777 | |
| 3778 | err_out: |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3779 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
Jeff Garzik | ac8869d | 2007-08-16 03:17:03 -0400 | [diff] [blame] | 3780 | ata_port_disable(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3781 | |
| 3782 | DPRINTK("EXIT\n"); |
| 3783 | } |
| 3784 | |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3785 | /** |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3786 | * sata_link_debounce - debounce SATA phy status |
| 3787 | * @link: ATA link to debounce SATA phy status for |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3788 | * @params: timing parameters { interval, duratinon, timeout } in msec |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3789 | * @deadline: deadline jiffies for the operation |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3790 | * |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3791 | * Make sure SStatus of @link reaches stable state, determined by |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3792 | * holding the same value where DET is not 1 for @duration polled |
| 3793 | * every @interval, before @timeout. Timeout constraints the |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3794 | * beginning of the stable state. Because DET gets stuck at 1 on |
| 3795 | * some controllers after hot unplugging, this functions waits |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3796 | * until timeout then returns 0 if DET is stable at 1. |
| 3797 | * |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3798 | * @timeout is further limited by @deadline. The sooner of the |
| 3799 | * two is used. |
| 3800 | * |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3801 | * LOCKING: |
| 3802 | * Kernel thread context (may sleep) |
| 3803 | * |
| 3804 | * RETURNS: |
| 3805 | * 0 on success, -errno on failure. |
| 3806 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3807 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
| 3808 | unsigned long deadline) |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 3809 | { |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3810 | unsigned long interval_msec = params[0]; |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3811 | unsigned long duration = msecs_to_jiffies(params[1]); |
| 3812 | unsigned long last_jiffies, t; |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3813 | u32 last, cur; |
| 3814 | int rc; |
| 3815 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3816 | t = jiffies + msecs_to_jiffies(params[2]); |
| 3817 | if (time_before(t, deadline)) |
| 3818 | deadline = t; |
| 3819 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3820 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3821 | return rc; |
| 3822 | cur &= 0xf; |
| 3823 | |
| 3824 | last = cur; |
| 3825 | last_jiffies = jiffies; |
| 3826 | |
| 3827 | while (1) { |
| 3828 | msleep(interval_msec); |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3829 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3830 | return rc; |
| 3831 | cur &= 0xf; |
| 3832 | |
| 3833 | /* DET stable? */ |
| 3834 | if (cur == last) { |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3835 | if (cur == 1 && time_before(jiffies, deadline)) |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3836 | continue; |
| 3837 | if (time_after(jiffies, last_jiffies + duration)) |
| 3838 | return 0; |
| 3839 | continue; |
| 3840 | } |
| 3841 | |
| 3842 | /* unstable, start over */ |
| 3843 | last = cur; |
| 3844 | last_jiffies = jiffies; |
| 3845 | |
Tejun Heo | f154515 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 3846 | /* Check deadline. If debouncing failed, return |
| 3847 | * -EPIPE to tell upper layer to lower link speed. |
| 3848 | */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3849 | if (time_after(jiffies, deadline)) |
Tejun Heo | f154515 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 3850 | return -EPIPE; |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3851 | } |
| 3852 | } |
| 3853 | |
| 3854 | /** |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3855 | * sata_link_resume - resume SATA link |
| 3856 | * @link: ATA link to resume SATA |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3857 | * @params: timing parameters { interval, duratinon, timeout } in msec |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3858 | * @deadline: deadline jiffies for the operation |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3859 | * |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3860 | * Resume SATA phy @link and debounce it. |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3861 | * |
| 3862 | * LOCKING: |
| 3863 | * Kernel thread context (may sleep) |
| 3864 | * |
| 3865 | * RETURNS: |
| 3866 | * 0 on success, -errno on failure. |
| 3867 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3868 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
| 3869 | unsigned long deadline) |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3870 | { |
| 3871 | u32 scontrol; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3872 | int rc; |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 3873 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3874 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3875 | return rc; |
| 3876 | |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3877 | scontrol = (scontrol & 0x0f0) | 0x300; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3878 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3879 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3880 | return rc; |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 3881 | |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3882 | /* Some PHYs react badly if SStatus is pounded immediately |
| 3883 | * after resuming. Delay 200ms before debouncing. |
| 3884 | */ |
| 3885 | msleep(200); |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 3886 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3887 | return sata_link_debounce(link, params, deadline); |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 3888 | } |
| 3889 | |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3890 | /** |
| 3891 | * ata_std_prereset - prepare for reset |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3892 | * @link: ATA link to be reset |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3893 | * @deadline: deadline jiffies for the operation |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3894 | * |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3895 | * @link is about to be reset. Initialize it. Failure from |
Tejun Heo | b8cffc6 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3896 | * prereset makes libata abort whole reset sequence and give up |
| 3897 | * that port, so prereset should be best-effort. It does its |
| 3898 | * best to prepare for reset sequence but if things go wrong, it |
| 3899 | * should just whine, not fail. |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3900 | * |
| 3901 | * LOCKING: |
| 3902 | * Kernel thread context (may sleep) |
| 3903 | * |
| 3904 | * RETURNS: |
| 3905 | * 0 on success, -errno otherwise. |
| 3906 | */ |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3907 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3908 | { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3909 | struct ata_port *ap = link->ap; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3910 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | e9c8391 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 3911 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3912 | int rc; |
| 3913 | |
Tejun Heo | 31daabd | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3914 | /* handle link resume */ |
Tejun Heo | 2832430 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 3915 | if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && |
Tejun Heo | 0c88758 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3916 | (link->flags & ATA_LFLAG_HRST_TO_RESUME)) |
Tejun Heo | 2832430 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 3917 | ehc->i.action |= ATA_EH_HARDRESET; |
| 3918 | |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 3919 | /* Some PMPs don't work with only SRST, force hardreset if PMP |
| 3920 | * is supported. |
| 3921 | */ |
| 3922 | if (ap->flags & ATA_FLAG_PMP) |
| 3923 | ehc->i.action |= ATA_EH_HARDRESET; |
| 3924 | |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3925 | /* if we're about to do hardreset, nothing more to do */ |
| 3926 | if (ehc->i.action & ATA_EH_HARDRESET) |
| 3927 | return 0; |
| 3928 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3929 | /* if SATA, resume link */ |
Tejun Heo | a16abc0 | 2007-05-21 18:33:47 +0200 | [diff] [blame] | 3930 | if (ap->flags & ATA_FLAG_SATA) { |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3931 | rc = sata_link_resume(link, timing, deadline); |
Tejun Heo | b8cffc6 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3932 | /* whine about phy resume failure but proceed */ |
| 3933 | if (rc && rc != -EOPNOTSUPP) |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3934 | ata_link_printk(link, KERN_WARNING, "failed to resume " |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3935 | "link for reset (errno=%d)\n", rc); |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3936 | } |
| 3937 | |
| 3938 | /* Wait for !BSY if the controller can wait for the first D2H |
| 3939 | * Reg FIS and we don't know that no device is attached. |
| 3940 | */ |
Tejun Heo | 0c88758 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3941 | if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) { |
Tejun Heo | b8cffc6 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3942 | rc = ata_wait_ready(ap, deadline); |
Tejun Heo | 6dffaf6 | 2007-05-23 11:58:52 +0200 | [diff] [blame] | 3943 | if (rc && rc != -ENODEV) { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3944 | ata_link_printk(link, KERN_WARNING, "device not ready " |
Tejun Heo | b8cffc6 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3945 | "(errno=%d), forcing hardreset\n", rc); |
| 3946 | ehc->i.action |= ATA_EH_HARDRESET; |
| 3947 | } |
| 3948 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3949 | |
| 3950 | return 0; |
| 3951 | } |
| 3952 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3953 | /** |
| 3954 | * ata_std_softreset - reset host port via ATA SRST |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3955 | * @link: ATA link to reset |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3956 | * @classes: resulting classes of attached devices |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3957 | * @deadline: deadline jiffies for the operation |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3958 | * |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 3959 | * Reset host port using ATA SRST. |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3960 | * |
| 3961 | * LOCKING: |
| 3962 | * Kernel thread context (may sleep) |
| 3963 | * |
| 3964 | * RETURNS: |
| 3965 | * 0 on success, -errno otherwise. |
| 3966 | */ |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3967 | int ata_std_softreset(struct ata_link *link, unsigned int *classes, |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3968 | unsigned long deadline) |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3969 | { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3970 | struct ata_port *ap = link->ap; |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3971 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3972 | unsigned int devmask = 0; |
| 3973 | int rc; |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3974 | u8 err; |
| 3975 | |
| 3976 | DPRINTK("ENTER\n"); |
| 3977 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3978 | if (ata_link_offline(link)) { |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 3979 | classes[0] = ATA_DEV_NONE; |
| 3980 | goto out; |
| 3981 | } |
| 3982 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3983 | /* determine if device 0/1 are present */ |
| 3984 | if (ata_devchk(ap, 0)) |
| 3985 | devmask |= (1 << 0); |
| 3986 | if (slave_possible && ata_devchk(ap, 1)) |
| 3987 | devmask |= (1 << 1); |
| 3988 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3989 | /* select device 0 again */ |
| 3990 | ap->ops->dev_select(ap, 0); |
| 3991 | |
| 3992 | /* issue bus reset */ |
| 3993 | DPRINTK("about to softreset, devmask=%x\n", devmask); |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3994 | rc = ata_bus_softreset(ap, devmask, deadline); |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3995 | /* if link is occupied, -ENODEV too is an error */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3996 | if (rc && (rc != -ENODEV || sata_scr_valid(link))) { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3997 | ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3998 | return rc; |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3999 | } |
| 4000 | |
| 4001 | /* determine by signature whether we have ATA or ATAPI devices */ |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 4002 | classes[0] = ata_dev_try_classify(&link->device[0], |
| 4003 | devmask & (1 << 0), &err); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4004 | if (slave_possible && err != 0x81) |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 4005 | classes[1] = ata_dev_try_classify(&link->device[1], |
| 4006 | devmask & (1 << 1), &err); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4007 | |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 4008 | out: |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4009 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
| 4010 | return 0; |
| 4011 | } |
| 4012 | |
| 4013 | /** |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4014 | * sata_link_hardreset - reset link via SATA phy reset |
| 4015 | * @link: link to reset |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4016 | * @timing: timing parameters { interval, duratinon, timeout } in msec |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 4017 | * @deadline: deadline jiffies for the operation |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4018 | * |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4019 | * SATA phy-reset @link using DET bits of SControl register. |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4020 | * |
| 4021 | * LOCKING: |
| 4022 | * Kernel thread context (may sleep) |
| 4023 | * |
| 4024 | * RETURNS: |
| 4025 | * 0 on success, -errno otherwise. |
| 4026 | */ |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4027 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 4028 | unsigned long deadline) |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4029 | { |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 4030 | u32 scontrol; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 4031 | int rc; |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 4032 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4033 | DPRINTK("ENTER\n"); |
| 4034 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4035 | if (sata_set_spd_needed(link)) { |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 4036 | /* SATA spec says nothing about how to reconfigure |
| 4037 | * spd. To be on the safe side, turn off phy during |
| 4038 | * reconfiguration. This works for at least ICH7 AHCI |
| 4039 | * and Sil3124. |
| 4040 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4041 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4042 | goto out; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 4043 | |
Martin Hicks | a34b6fc | 2006-07-05 15:06:13 -0400 | [diff] [blame] | 4044 | scontrol = (scontrol & 0x0f0) | 0x304; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 4045 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4046 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4047 | goto out; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 4048 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4049 | sata_set_spd(link); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 4050 | } |
| 4051 | |
| 4052 | /* issue phy wake/reset */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4053 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4054 | goto out; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 4055 | |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 4056 | scontrol = (scontrol & 0x0f0) | 0x301; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 4057 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4058 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4059 | goto out; |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4060 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 4061 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4062 | * 10.4.2 says at least 1 ms. |
| 4063 | */ |
| 4064 | msleep(1); |
| 4065 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4066 | /* bring link back */ |
| 4067 | rc = sata_link_resume(link, timing, deadline); |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4068 | out: |
| 4069 | DPRINTK("EXIT, rc=%d\n", rc); |
| 4070 | return rc; |
| 4071 | } |
| 4072 | |
| 4073 | /** |
| 4074 | * sata_std_hardreset - reset host port via SATA phy reset |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4075 | * @link: link to reset |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4076 | * @class: resulting class of attached device |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 4077 | * @deadline: deadline jiffies for the operation |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4078 | * |
| 4079 | * SATA phy-reset host port using DET bits of SControl register, |
| 4080 | * wait for !BSY and classify the attached device. |
| 4081 | * |
| 4082 | * LOCKING: |
| 4083 | * Kernel thread context (may sleep) |
| 4084 | * |
| 4085 | * RETURNS: |
| 4086 | * 0 on success, -errno otherwise. |
| 4087 | */ |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4088 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 4089 | unsigned long deadline) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4090 | { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4091 | struct ata_port *ap = link->ap; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4092 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4093 | int rc; |
| 4094 | |
| 4095 | DPRINTK("ENTER\n"); |
| 4096 | |
| 4097 | /* do hardreset */ |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4098 | rc = sata_link_hardreset(link, timing, deadline); |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4099 | if (rc) { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4100 | ata_link_printk(link, KERN_ERR, |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 4101 | "COMRESET failed (errno=%d)\n", rc); |
| 4102 | return rc; |
| 4103 | } |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4104 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4105 | /* TODO: phy layer with polling, timeouts, etc. */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4106 | if (ata_link_offline(link)) { |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4107 | *class = ATA_DEV_NONE; |
| 4108 | DPRINTK("EXIT, link offline\n"); |
| 4109 | return 0; |
| 4110 | } |
| 4111 | |
Tejun Heo | 88ff6ea | 2007-10-16 14:21:24 -0700 | [diff] [blame] | 4112 | /* wait a while before checking status */ |
| 4113 | ata_wait_after_reset(ap, deadline); |
Tejun Heo | 34fee22 | 2007-02-02 15:29:27 +0900 | [diff] [blame] | 4114 | |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 4115 | /* If PMP is supported, we have to do follow-up SRST. Note |
| 4116 | * that some PMPs don't send D2H Reg FIS after hardreset at |
| 4117 | * all if the first port is empty. Wait for it just for a |
| 4118 | * second and request follow-up SRST. |
| 4119 | */ |
| 4120 | if (ap->flags & ATA_FLAG_PMP) { |
| 4121 | ata_wait_ready(ap, jiffies + HZ); |
| 4122 | return -EAGAIN; |
| 4123 | } |
| 4124 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 4125 | rc = ata_wait_ready(ap, deadline); |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 4126 | /* link occupied, -ENODEV too is an error */ |
| 4127 | if (rc) { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4128 | ata_link_printk(link, KERN_ERR, |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 4129 | "COMRESET failed (errno=%d)\n", rc); |
| 4130 | return rc; |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4131 | } |
| 4132 | |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 4133 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
| 4134 | |
Tejun Heo | 3f19859 | 2007-09-02 23:23:57 +0900 | [diff] [blame] | 4135 | *class = ata_dev_try_classify(link->device, 1, NULL); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4136 | |
| 4137 | DPRINTK("EXIT, class=%u\n", *class); |
| 4138 | return 0; |
| 4139 | } |
| 4140 | |
| 4141 | /** |
| 4142 | * ata_std_postreset - standard postreset callback |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4143 | * @link: the target ata_link |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4144 | * @classes: classes of attached devices |
| 4145 | * |
| 4146 | * This function is invoked after a successful reset. Note that |
| 4147 | * the device might have been reset more than once using |
| 4148 | * different reset methods before postreset is invoked. |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4149 | * |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4150 | * LOCKING: |
| 4151 | * Kernel thread context (may sleep) |
| 4152 | */ |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4153 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4154 | { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4155 | struct ata_port *ap = link->ap; |
Tejun Heo | dc2b351 | 2006-05-15 20:58:00 +0900 | [diff] [blame] | 4156 | u32 serror; |
| 4157 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4158 | DPRINTK("ENTER\n"); |
| 4159 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4160 | /* print link status */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4161 | sata_print_link_status(link); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4162 | |
Tejun Heo | dc2b351 | 2006-05-15 20:58:00 +0900 | [diff] [blame] | 4163 | /* clear SError */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 4164 | if (sata_scr_read(link, SCR_ERROR, &serror) == 0) |
| 4165 | sata_scr_write(link, SCR_ERROR, serror); |
Tejun Heo | f7fe7ad4 | 2007-12-08 08:47:01 +0900 | [diff] [blame] | 4166 | link->eh_info.serror = 0; |
Tejun Heo | dc2b351 | 2006-05-15 20:58:00 +0900 | [diff] [blame] | 4167 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4168 | /* is double-select really necessary? */ |
| 4169 | if (classes[0] != ATA_DEV_NONE) |
| 4170 | ap->ops->dev_select(ap, 1); |
| 4171 | if (classes[1] != ATA_DEV_NONE) |
| 4172 | ap->ops->dev_select(ap, 0); |
| 4173 | |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 4174 | /* bail out if no device is present */ |
| 4175 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { |
| 4176 | DPRINTK("EXIT, no device\n"); |
| 4177 | return; |
| 4178 | } |
| 4179 | |
| 4180 | /* set up device control */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4181 | if (ap->ioaddr.ctl_addr) |
| 4182 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4183 | |
| 4184 | DPRINTK("EXIT\n"); |
| 4185 | } |
| 4186 | |
Tejun Heo | a62c0fc | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 4187 | /** |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4188 | * ata_dev_same_device - Determine whether new ID matches configured device |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4189 | * @dev: device to compare against |
| 4190 | * @new_class: class of the new device |
| 4191 | * @new_id: IDENTIFY page of the new device |
| 4192 | * |
| 4193 | * Compare @new_class and @new_id against @dev and determine |
| 4194 | * whether @dev is the device indicated by @new_class and |
| 4195 | * @new_id. |
| 4196 | * |
| 4197 | * LOCKING: |
| 4198 | * None. |
| 4199 | * |
| 4200 | * RETURNS: |
| 4201 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. |
| 4202 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 4203 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
| 4204 | const u16 *new_id) |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4205 | { |
| 4206 | const u16 *old_id = dev->id; |
Tejun Heo | a0cf733 | 2007-01-02 20:18:49 +0900 | [diff] [blame] | 4207 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
| 4208 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4209 | |
| 4210 | if (dev->class != new_class) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 4211 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
| 4212 | dev->class, new_class); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4213 | return 0; |
| 4214 | } |
| 4215 | |
Tejun Heo | a0cf733 | 2007-01-02 20:18:49 +0900 | [diff] [blame] | 4216 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
| 4217 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); |
| 4218 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); |
| 4219 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4220 | |
| 4221 | if (strcmp(model[0], model[1])) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 4222 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
| 4223 | "'%s' != '%s'\n", model[0], model[1]); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4224 | return 0; |
| 4225 | } |
| 4226 | |
| 4227 | if (strcmp(serial[0], serial[1])) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 4228 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
| 4229 | "'%s' != '%s'\n", serial[0], serial[1]); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4230 | return 0; |
| 4231 | } |
| 4232 | |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4233 | return 1; |
| 4234 | } |
| 4235 | |
| 4236 | /** |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4237 | * ata_dev_reread_id - Re-read IDENTIFY data |
Henrik Kretzschmar | 3fae450 | 2007-06-19 10:10:50 +0200 | [diff] [blame] | 4238 | * @dev: target ATA device |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 4239 | * @readid_flags: read ID flags |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4240 | * |
| 4241 | * Re-read IDENTIFY page and make sure @dev is still attached to |
| 4242 | * the port. |
| 4243 | * |
| 4244 | * LOCKING: |
| 4245 | * Kernel thread context (may sleep) |
| 4246 | * |
| 4247 | * RETURNS: |
| 4248 | * 0 on success, negative errno otherwise |
| 4249 | */ |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4250 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4251 | { |
Tejun Heo | 5eb45c0 | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 4252 | unsigned int class = dev->class; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 4253 | u16 *id = (void *)dev->link->ap->sector_buf; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4254 | int rc; |
| 4255 | |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 4256 | /* read ID data */ |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 4257 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4258 | if (rc) |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4259 | return rc; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4260 | |
| 4261 | /* is the device still there? */ |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4262 | if (!ata_dev_same_device(dev, class, id)) |
| 4263 | return -ENODEV; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4264 | |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 4265 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4266 | return 0; |
| 4267 | } |
| 4268 | |
| 4269 | /** |
| 4270 | * ata_dev_revalidate - Revalidate ATA device |
| 4271 | * @dev: device to revalidate |
Tejun Heo | 422c9da | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 4272 | * @new_class: new class code |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4273 | * @readid_flags: read ID flags |
| 4274 | * |
| 4275 | * Re-read IDENTIFY page, make sure @dev is still attached to the |
| 4276 | * port and reconfigure it according to the new IDENTIFY page. |
| 4277 | * |
| 4278 | * LOCKING: |
| 4279 | * Kernel thread context (may sleep) |
| 4280 | * |
| 4281 | * RETURNS: |
| 4282 | * 0 on success, negative errno otherwise |
| 4283 | */ |
Tejun Heo | 422c9da | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 4284 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
| 4285 | unsigned int readid_flags) |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4286 | { |
Tejun Heo | 6ddcd3b | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4287 | u64 n_sectors = dev->n_sectors; |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4288 | int rc; |
| 4289 | |
| 4290 | if (!ata_dev_enabled(dev)) |
| 4291 | return -ENODEV; |
| 4292 | |
Tejun Heo | 422c9da | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 4293 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
| 4294 | if (ata_class_enabled(new_class) && |
| 4295 | new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { |
| 4296 | ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", |
| 4297 | dev->class, new_class); |
| 4298 | rc = -ENODEV; |
| 4299 | goto fail; |
| 4300 | } |
| 4301 | |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4302 | /* re-read ID */ |
| 4303 | rc = ata_dev_reread_id(dev, readid_flags); |
| 4304 | if (rc) |
| 4305 | goto fail; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4306 | |
| 4307 | /* configure device according to the new ID */ |
Tejun Heo | efdaedc | 2006-11-01 18:38:52 +0900 | [diff] [blame] | 4308 | rc = ata_dev_configure(dev); |
Tejun Heo | 6ddcd3b | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4309 | if (rc) |
| 4310 | goto fail; |
| 4311 | |
| 4312 | /* verify n_sectors hasn't changed */ |
Tejun Heo | b54eebd | 2007-08-17 18:46:51 +0900 | [diff] [blame] | 4313 | if (dev->class == ATA_DEV_ATA && n_sectors && |
| 4314 | dev->n_sectors != n_sectors) { |
Tejun Heo | 6ddcd3b | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4315 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
| 4316 | "%llu != %llu\n", |
| 4317 | (unsigned long long)n_sectors, |
| 4318 | (unsigned long long)dev->n_sectors); |
Tejun Heo | 8270bec | 2007-08-16 03:02:22 +0900 | [diff] [blame] | 4319 | |
| 4320 | /* restore original n_sectors */ |
| 4321 | dev->n_sectors = n_sectors; |
| 4322 | |
Tejun Heo | 6ddcd3b | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 4323 | rc = -ENODEV; |
| 4324 | goto fail; |
| 4325 | } |
| 4326 | |
| 4327 | return 0; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4328 | |
| 4329 | fail: |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 4330 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 4331 | return rc; |
| 4332 | } |
| 4333 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4334 | struct ata_blacklist_entry { |
| 4335 | const char *model_num; |
| 4336 | const char *model_rev; |
| 4337 | unsigned long horkage; |
| 4338 | }; |
| 4339 | |
| 4340 | static const struct ata_blacklist_entry ata_device_blacklist [] = { |
| 4341 | /* Devices with DMA related problems under Linux */ |
| 4342 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, |
| 4343 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, |
| 4344 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, |
| 4345 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, |
| 4346 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, |
| 4347 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, |
| 4348 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, |
| 4349 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, |
| 4350 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, |
| 4351 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, |
| 4352 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, |
| 4353 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, |
| 4354 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, |
| 4355 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, |
| 4356 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, |
| 4357 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, |
| 4358 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, |
| 4359 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, |
| 4360 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, |
| 4361 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, |
| 4362 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, |
| 4363 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, |
| 4364 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, |
| 4365 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, |
| 4366 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, |
| 4367 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4368 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
| 4369 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 4370 | { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
Dave Jones | 39f1988 | 2007-05-21 14:31:03 -0400 | [diff] [blame] | 4371 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 4372 | /* Odd clown on sil3726/4726 PMPs */ |
| 4373 | { "Config Disk", NULL, ATA_HORKAGE_NODMA | |
| 4374 | ATA_HORKAGE_SKIP_PM }, |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4375 | |
Albert Lee | 18d6e9d | 2007-04-02 11:34:15 +0800 | [diff] [blame] | 4376 | /* Weird ATAPI devices */ |
Tejun Heo | 40a1d53 | 2007-06-27 02:49:38 +0900 | [diff] [blame] | 4377 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
Albert Lee | 18d6e9d | 2007-04-02 11:34:15 +0800 | [diff] [blame] | 4378 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4379 | /* Devices we expect to fail diagnostics */ |
| 4380 | |
| 4381 | /* Devices where NCQ should be avoided */ |
| 4382 | /* NCQ is slow */ |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 4383 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
Tejun Heo | 459ad68 | 2007-12-07 12:46:23 +0900 | [diff] [blame] | 4384 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
Tejun Heo | 09125ea | 2007-02-28 15:21:23 +0900 | [diff] [blame] | 4385 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
| 4386 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, |
Paul Rolland | 7acfaf3 | 2007-03-26 21:43:44 -0800 | [diff] [blame] | 4387 | /* NCQ is broken */ |
Jeff Garzik | 539cc7c | 2007-09-20 16:31:47 -0400 | [diff] [blame] | 4388 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
Alan Cox | 0e3dbc0 | 2007-09-20 15:22:47 +0100 | [diff] [blame] | 4389 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
Paolo Ornati | da6f0ec | 2007-10-04 11:06:56 +0900 | [diff] [blame] | 4390 | { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
Tejun Heo | e41bd3e | 2007-12-09 19:45:39 +0900 | [diff] [blame] | 4391 | { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
Jeff Garzik | 539cc7c | 2007-09-20 16:31:47 -0400 | [diff] [blame] | 4392 | |
Robert Hancock | 36e337d | 2007-04-02 22:05:29 -0600 | [diff] [blame] | 4393 | /* Blacklist entries taken from Silicon Image 3124/3132 |
| 4394 | Windows driver .inf file - also several Linux problem reports */ |
| 4395 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, |
| 4396 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, |
| 4397 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4398 | |
Tejun Heo | 16c55b0 | 2007-08-29 11:58:33 +0900 | [diff] [blame] | 4399 | /* devices which puke on READ_NATIVE_MAX */ |
| 4400 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, |
| 4401 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, |
| 4402 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, |
| 4403 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4404 | |
Alan Cox | 93328e1 | 2007-09-29 04:06:48 -0400 | [diff] [blame] | 4405 | /* Devices which report 1 sector over size HPA */ |
| 4406 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
| 4407 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
Mikko Rapeli | b152fcd | 2008-02-19 01:41:25 +0100 | [diff] [blame] | 4408 | { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
Alan Cox | 93328e1 | 2007-09-29 04:06:48 -0400 | [diff] [blame] | 4409 | |
Alan Cox | 6bbfd53 | 2007-11-05 22:58:58 +0000 | [diff] [blame] | 4410 | /* Devices which get the IVB wrong */ |
| 4411 | { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, |
| 4412 | { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, }, |
Peter Missel | e9f3340 | 2007-11-27 18:04:42 +0100 | [diff] [blame] | 4413 | { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, }, |
| 4414 | { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, |
| 4415 | { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, |
Alan Cox | 6bbfd53 | 2007-11-05 22:58:58 +0000 | [diff] [blame] | 4416 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4417 | /* End Marker */ |
| 4418 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4419 | }; |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 4420 | |
Adrian Bunk | 741b776 | 2007-10-24 18:23:06 +0200 | [diff] [blame] | 4421 | static int strn_pattern_cmp(const char *patt, const char *name, int wildchar) |
Jeff Garzik | 539cc7c | 2007-09-20 16:31:47 -0400 | [diff] [blame] | 4422 | { |
| 4423 | const char *p; |
| 4424 | int len; |
| 4425 | |
| 4426 | /* |
| 4427 | * check for trailing wildcard: *\0 |
| 4428 | */ |
| 4429 | p = strchr(patt, wildchar); |
| 4430 | if (p && ((*(p + 1)) == 0)) |
| 4431 | len = p - patt; |
Andrew Paprocki | 317b50b | 2007-10-15 15:43:12 -0400 | [diff] [blame] | 4432 | else { |
Jeff Garzik | 539cc7c | 2007-09-20 16:31:47 -0400 | [diff] [blame] | 4433 | len = strlen(name); |
Andrew Paprocki | 317b50b | 2007-10-15 15:43:12 -0400 | [diff] [blame] | 4434 | if (!len) { |
| 4435 | if (!*patt) |
| 4436 | return 0; |
| 4437 | return -1; |
| 4438 | } |
| 4439 | } |
Jeff Garzik | 539cc7c | 2007-09-20 16:31:47 -0400 | [diff] [blame] | 4440 | |
| 4441 | return strncmp(patt, name, len); |
| 4442 | } |
| 4443 | |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 4444 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4445 | { |
Tejun Heo | 8bfa79f | 2007-01-02 20:19:40 +0900 | [diff] [blame] | 4446 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
| 4447 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4448 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
Albert Lee | 3a77827 | 2006-06-22 13:00:25 +0800 | [diff] [blame] | 4449 | |
Tejun Heo | 8bfa79f | 2007-01-02 20:19:40 +0900 | [diff] [blame] | 4450 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
| 4451 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4452 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4453 | while (ad->model_num) { |
Jeff Garzik | 539cc7c | 2007-09-20 16:31:47 -0400 | [diff] [blame] | 4454 | if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4455 | if (ad->model_rev == NULL) |
| 4456 | return ad->horkage; |
Jeff Garzik | 539cc7c | 2007-09-20 16:31:47 -0400 | [diff] [blame] | 4457 | if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4458 | return ad->horkage; |
Alan Cox | f4b15fe | 2006-03-22 15:54:04 +0000 | [diff] [blame] | 4459 | } |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4460 | ad++; |
Alan Cox | f4b15fe | 2006-03-22 15:54:04 +0000 | [diff] [blame] | 4461 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4462 | return 0; |
| 4463 | } |
| 4464 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4465 | static int ata_dma_blacklisted(const struct ata_device *dev) |
| 4466 | { |
| 4467 | /* We don't support polling DMA. |
| 4468 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) |
| 4469 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. |
| 4470 | */ |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 4471 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4472 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
| 4473 | return 1; |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 4474 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 4475 | } |
| 4476 | |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 4477 | /** |
Alan Cox | 6bbfd53 | 2007-11-05 22:58:58 +0000 | [diff] [blame] | 4478 | * ata_is_40wire - check drive side detection |
| 4479 | * @dev: device |
| 4480 | * |
| 4481 | * Perform drive side detection decoding, allowing for device vendors |
| 4482 | * who can't follow the documentation. |
| 4483 | */ |
| 4484 | |
| 4485 | static int ata_is_40wire(struct ata_device *dev) |
| 4486 | { |
| 4487 | if (dev->horkage & ATA_HORKAGE_IVB) |
| 4488 | return ata_drive_40wire_relaxed(dev->id); |
| 4489 | return ata_drive_40wire(dev->id); |
| 4490 | } |
| 4491 | |
| 4492 | /** |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 4493 | * ata_dev_xfermask - Compute supported xfermask of the given device |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 4494 | * @dev: Device to compute xfermask for |
| 4495 | * |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 4496 | * Compute supported xfermask of @dev and store it in |
| 4497 | * dev->*_mask. This function is responsible for applying all |
| 4498 | * known limits including host controller limits, device |
| 4499 | * blacklist, etc... |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 4500 | * |
| 4501 | * LOCKING: |
| 4502 | * None. |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 4503 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 4504 | static void ata_dev_xfermask(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4505 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 4506 | struct ata_link *link = dev->link; |
| 4507 | struct ata_port *ap = link->ap; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4508 | struct ata_host *host = ap->host; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 4509 | unsigned long xfer_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4510 | |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 4511 | /* controller modes available */ |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 4512 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
| 4513 | ap->mwdma_mask, ap->udma_mask); |
| 4514 | |
Robert Hancock | 8343f88 | 2007-03-06 02:37:51 -0800 | [diff] [blame] | 4515 | /* drive modes available */ |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 4516 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
| 4517 | dev->mwdma_mask, dev->udma_mask); |
| 4518 | xfer_mask &= ata_id_xfermask(dev->id); |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 4519 | |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 4520 | /* |
| 4521 | * CFA Advanced TrueIDE timings are not allowed on a shared |
| 4522 | * cable |
| 4523 | */ |
| 4524 | if (ata_dev_pair(dev)) { |
| 4525 | /* No PIO5 or PIO6 */ |
| 4526 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); |
| 4527 | /* No MWDMA3 or MWDMA 4 */ |
| 4528 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); |
| 4529 | } |
| 4530 | |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 4531 | if (ata_dma_blacklisted(dev)) { |
| 4532 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 4533 | ata_dev_printk(dev, KERN_WARNING, |
| 4534 | "device is on DMA blacklist, disabling DMA\n"); |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 4535 | } |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 4536 | |
Petr Vandrovec | 14d66ab | 2007-03-08 10:12:12 +0100 | [diff] [blame] | 4537 | if ((host->flags & ATA_HOST_SIMPLEX) && |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 4538 | host->simplex_claimed && host->simplex_claimed != ap) { |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 4539 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
| 4540 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " |
| 4541 | "other device, disabling DMA\n"); |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 4542 | } |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 4543 | |
Jeff Garzik | e424675 | 2007-03-09 09:56:46 -0500 | [diff] [blame] | 4544 | if (ap->flags & ATA_FLAG_NO_IORDY) |
| 4545 | xfer_mask &= ata_pio_mask_no_iordy(dev); |
| 4546 | |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 4547 | if (ap->ops->mode_filter) |
Alan Cox | a76b62c | 2007-03-09 09:34:07 -0500 | [diff] [blame] | 4548 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 4549 | |
Robert Hancock | 8343f88 | 2007-03-06 02:37:51 -0800 | [diff] [blame] | 4550 | /* Apply cable rule here. Don't apply it early because when |
| 4551 | * we handle hot plug the cable type can itself change. |
| 4552 | * Check this last so that we know if the transfer rate was |
| 4553 | * solely limited by the cable. |
| 4554 | * Unknown or 80 wire cables reported host side are checked |
| 4555 | * drive side as well. Cases where we know a 40wire cable |
| 4556 | * is used safely for 80 are not checked here. |
| 4557 | */ |
| 4558 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) |
| 4559 | /* UDMA/44 or higher would be available */ |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 4560 | if ((ap->cbl == ATA_CBL_PATA40) || |
Alan Cox | 6bbfd53 | 2007-11-05 22:58:58 +0000 | [diff] [blame] | 4561 | (ata_is_40wire(dev) && |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 4562 | (ap->cbl == ATA_CBL_PATA_UNK || |
| 4563 | ap->cbl == ATA_CBL_PATA80))) { |
| 4564 | ata_dev_printk(dev, KERN_WARNING, |
Robert Hancock | 8343f88 | 2007-03-06 02:37:51 -0800 | [diff] [blame] | 4565 | "limited to UDMA/33 due to 40-wire cable\n"); |
| 4566 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); |
| 4567 | } |
| 4568 | |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 4569 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
| 4570 | &dev->mwdma_mask, &dev->udma_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4571 | } |
| 4572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4573 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4574 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4575 | * @dev: Device to which command will be sent |
| 4576 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 4577 | * Issue SET FEATURES - XFER MODE command to device @dev |
| 4578 | * on port @ap. |
| 4579 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4580 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4581 | * PCI/etc. bus probe sem. |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 4582 | * |
| 4583 | * RETURNS: |
| 4584 | * 0 on success, AC_ERR_* mask otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4585 | */ |
| 4586 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 4587 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4588 | { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 4589 | struct ata_taskfile tf; |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 4590 | unsigned int err_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4591 | |
| 4592 | /* set up set-features taskfile */ |
| 4593 | DPRINTK("set features - xfer mode\n"); |
| 4594 | |
Tejun Heo | 464cf17 | 2007-05-27 15:10:40 +0200 | [diff] [blame] | 4595 | /* Some controllers and ATAPI devices show flaky interrupt |
| 4596 | * behavior after setting xfer mode. Use polling instead. |
| 4597 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 4598 | ata_tf_init(dev, &tf); |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 4599 | tf.command = ATA_CMD_SET_FEATURES; |
| 4600 | tf.feature = SETFEATURES_XFER; |
Tejun Heo | 464cf17 | 2007-05-27 15:10:40 +0200 | [diff] [blame] | 4601 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 4602 | tf.protocol = ATA_PROT_NODATA; |
Alan Cox | b9f8ab2 | 2007-11-19 14:33:11 +0000 | [diff] [blame] | 4603 | /* If we are using IORDY we must send the mode setting command */ |
Jeff Garzik | 11b7bec | 2007-11-23 21:12:14 -0500 | [diff] [blame] | 4604 | if (ata_pio_need_iordy(dev)) |
| 4605 | tf.nsect = dev->xfer_mode; |
Alan Cox | b9f8ab2 | 2007-11-19 14:33:11 +0000 | [diff] [blame] | 4606 | /* If the device has IORDY and the controller does not - turn it off */ |
| 4607 | else if (ata_id_has_iordy(dev->id)) |
Jeff Garzik | 11b7bec | 2007-11-23 21:12:14 -0500 | [diff] [blame] | 4608 | tf.nsect = 0x01; |
Alan Cox | b9f8ab2 | 2007-11-19 14:33:11 +0000 | [diff] [blame] | 4609 | else /* In the ancient relic department - skip all of this */ |
| 4610 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4611 | |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 4612 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4613 | |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 4614 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| 4615 | return err_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4616 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4617 | /** |
Jeff Garzik | 218f3d3 | 2007-10-25 00:33:27 -0400 | [diff] [blame] | 4618 | * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 4619 | * @dev: Device to which command will be sent |
| 4620 | * @enable: Whether to enable or disable the feature |
Jeff Garzik | 218f3d3 | 2007-10-25 00:33:27 -0400 | [diff] [blame] | 4621 | * @feature: The sector count represents the feature to set |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 4622 | * |
| 4623 | * Issue SET FEATURES - SATA FEATURES command to device @dev |
Jeff Garzik | 218f3d3 | 2007-10-25 00:33:27 -0400 | [diff] [blame] | 4624 | * on port @ap with sector count |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 4625 | * |
| 4626 | * LOCKING: |
| 4627 | * PCI/etc. bus probe sem. |
| 4628 | * |
| 4629 | * RETURNS: |
| 4630 | * 0 on success, AC_ERR_* mask otherwise. |
| 4631 | */ |
Jeff Garzik | 218f3d3 | 2007-10-25 00:33:27 -0400 | [diff] [blame] | 4632 | static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, |
| 4633 | u8 feature) |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 4634 | { |
| 4635 | struct ata_taskfile tf; |
| 4636 | unsigned int err_mask; |
| 4637 | |
| 4638 | /* set up set-features taskfile */ |
| 4639 | DPRINTK("set features - SATA features\n"); |
| 4640 | |
| 4641 | ata_tf_init(dev, &tf); |
| 4642 | tf.command = ATA_CMD_SET_FEATURES; |
| 4643 | tf.feature = enable; |
| 4644 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 4645 | tf.protocol = ATA_PROT_NODATA; |
Jeff Garzik | 218f3d3 | 2007-10-25 00:33:27 -0400 | [diff] [blame] | 4646 | tf.nsect = feature; |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 4647 | |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 4648 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
Kristen Carlson Accardi | 9f45cbd | 2007-08-15 03:57:11 -0400 | [diff] [blame] | 4649 | |
| 4650 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| 4651 | return err_mask; |
| 4652 | } |
| 4653 | |
| 4654 | /** |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 4655 | * ata_dev_init_params - Issue INIT DEV PARAMS command |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 4656 | * @dev: Device to which command will be sent |
Randy Dunlap | e2a7f77 | 2006-05-18 10:50:18 -0700 | [diff] [blame] | 4657 | * @heads: Number of heads (taskfile parameter) |
| 4658 | * @sectors: Number of sectors (taskfile parameter) |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 4659 | * |
| 4660 | * LOCKING: |
Tejun Heo | 6aff8f1 | 2006-02-15 18:24:09 +0900 | [diff] [blame] | 4661 | * Kernel thread context (may sleep) |
| 4662 | * |
| 4663 | * RETURNS: |
| 4664 | * 0 on success, AC_ERR_* mask otherwise. |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 4665 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 4666 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
| 4667 | u16 heads, u16 sectors) |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 4668 | { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 4669 | struct ata_taskfile tf; |
Tejun Heo | 6aff8f1 | 2006-02-15 18:24:09 +0900 | [diff] [blame] | 4670 | unsigned int err_mask; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 4671 | |
| 4672 | /* Number of sectors per track 1-255. Number of heads 1-16 */ |
| 4673 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) |
Albert Lee | 00b6f5e | 2006-03-27 16:39:18 +0800 | [diff] [blame] | 4674 | return AC_ERR_INVALID; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 4675 | |
| 4676 | /* set up init dev params taskfile */ |
| 4677 | DPRINTK("init dev params \n"); |
| 4678 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 4679 | ata_tf_init(dev, &tf); |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 4680 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
| 4681 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 4682 | tf.protocol = ATA_PROT_NODATA; |
| 4683 | tf.nsect = sectors; |
| 4684 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 4685 | |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 4686 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
Alan Cox | 18b2466 | 2007-08-08 14:28:49 +0100 | [diff] [blame] | 4687 | /* A clean abort indicates an original or just out of spec drive |
| 4688 | and we should continue as we issue the setup based on the |
| 4689 | drive reported working geometry */ |
| 4690 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) |
| 4691 | err_mask = 0; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 4692 | |
Tejun Heo | 6aff8f1 | 2006-02-15 18:24:09 +0900 | [diff] [blame] | 4693 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| 4694 | return err_mask; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 4695 | } |
| 4696 | |
| 4697 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4698 | * ata_sg_clean - Unmap DMA memory associated with command |
| 4699 | * @qc: Command containing DMA memory to be released |
| 4700 | * |
| 4701 | * Unmap all mapped DMA memory associated with this command. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4702 | * |
| 4703 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4704 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4705 | */ |
Tejun Heo | 70e6ad0 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 4706 | void ata_sg_clean(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4707 | { |
| 4708 | struct ata_port *ap = qc->ap; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4709 | struct scatterlist *sg = qc->sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4710 | int dir = qc->dma_dir; |
| 4711 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 4712 | WARN_ON(sg == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4713 | |
James Bottomley | dde2020 | 2008-02-19 11:36:56 +0100 | [diff] [blame] | 4714 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4715 | |
James Bottomley | dde2020 | 2008-02-19 11:36:56 +0100 | [diff] [blame] | 4716 | if (qc->n_elem) |
| 4717 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4718 | |
| 4719 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4720 | qc->sg = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4721 | } |
| 4722 | |
| 4723 | /** |
| 4724 | * ata_fill_sg - Fill PCI IDE PRD table |
| 4725 | * @qc: Metadata associated with taskfile to be transferred |
| 4726 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 4727 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 4728 | * associated with the current disk command. |
| 4729 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4730 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4731 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4732 | * |
| 4733 | */ |
| 4734 | static void ata_fill_sg(struct ata_queued_cmd *qc) |
| 4735 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4736 | struct ata_port *ap = qc->ap; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4737 | struct scatterlist *sg; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4738 | unsigned int si, pi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4739 | |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4740 | pi = 0; |
| 4741 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4742 | u32 addr, offset; |
| 4743 | u32 sg_len, len; |
| 4744 | |
| 4745 | /* determine if physical DMA addr spans 64K boundary. |
| 4746 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 4747 | * truncate dma_addr_t to u32. |
| 4748 | */ |
| 4749 | addr = (u32) sg_dma_address(sg); |
| 4750 | sg_len = sg_dma_len(sg); |
| 4751 | |
| 4752 | while (sg_len) { |
| 4753 | offset = addr & 0xffff; |
| 4754 | len = sg_len; |
| 4755 | if ((offset + sg_len) > 0x10000) |
| 4756 | len = 0x10000 - offset; |
| 4757 | |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4758 | ap->prd[pi].addr = cpu_to_le32(addr); |
| 4759 | ap->prd[pi].flags_len = cpu_to_le32(len & 0xffff); |
| 4760 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4761 | |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4762 | pi++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4763 | sg_len -= len; |
| 4764 | addr += len; |
| 4765 | } |
| 4766 | } |
| 4767 | |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4768 | ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4769 | } |
Tejun Heo | b9a4197 | 2007-06-27 02:48:43 +0900 | [diff] [blame] | 4770 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4771 | /** |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4772 | * ata_fill_sg_dumb - Fill PCI IDE PRD table |
| 4773 | * @qc: Metadata associated with taskfile to be transferred |
| 4774 | * |
| 4775 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 4776 | * associated with the current disk command. Perform the fill |
| 4777 | * so that we avoid writing any length 64K records for |
| 4778 | * controllers that don't follow the spec. |
| 4779 | * |
| 4780 | * LOCKING: |
| 4781 | * spin_lock_irqsave(host lock) |
| 4782 | * |
| 4783 | */ |
| 4784 | static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) |
| 4785 | { |
| 4786 | struct ata_port *ap = qc->ap; |
| 4787 | struct scatterlist *sg; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4788 | unsigned int si, pi; |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4789 | |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4790 | pi = 0; |
| 4791 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4792 | u32 addr, offset; |
| 4793 | u32 sg_len, len, blen; |
| 4794 | |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 4795 | /* determine if physical DMA addr spans 64K boundary. |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4796 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 4797 | * truncate dma_addr_t to u32. |
| 4798 | */ |
| 4799 | addr = (u32) sg_dma_address(sg); |
| 4800 | sg_len = sg_dma_len(sg); |
| 4801 | |
| 4802 | while (sg_len) { |
| 4803 | offset = addr & 0xffff; |
| 4804 | len = sg_len; |
| 4805 | if ((offset + sg_len) > 0x10000) |
| 4806 | len = 0x10000 - offset; |
| 4807 | |
| 4808 | blen = len & 0xffff; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4809 | ap->prd[pi].addr = cpu_to_le32(addr); |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4810 | if (blen == 0) { |
| 4811 | /* Some PATA chipsets like the CS5530 can't |
| 4812 | cope with 0x0000 meaning 64K as the spec says */ |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4813 | ap->prd[pi].flags_len = cpu_to_le32(0x8000); |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4814 | blen = 0x8000; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4815 | ap->prd[++pi].addr = cpu_to_le32(addr + 0x8000); |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4816 | } |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4817 | ap->prd[pi].flags_len = cpu_to_le32(blen); |
| 4818 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4819 | |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4820 | pi++; |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4821 | sg_len -= len; |
| 4822 | addr += len; |
| 4823 | } |
| 4824 | } |
| 4825 | |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4826 | ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4827 | } |
| 4828 | |
| 4829 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4830 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported |
| 4831 | * @qc: Metadata associated with taskfile to check |
| 4832 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 4833 | * Allow low-level driver to filter ATA PACKET commands, returning |
| 4834 | * a status indicating whether or not it is OK to use DMA for the |
| 4835 | * supplied PACKET command. |
| 4836 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4837 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4838 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4839 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4840 | * RETURNS: 0 when ATAPI DMA can be used |
| 4841 | * nonzero otherwise |
| 4842 | */ |
| 4843 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) |
| 4844 | { |
| 4845 | struct ata_port *ap = qc->ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4846 | |
Tejun Heo | b9a4197 | 2007-06-27 02:48:43 +0900 | [diff] [blame] | 4847 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a |
| 4848 | * few ATAPI devices choke on such DMA requests. |
| 4849 | */ |
| 4850 | if (unlikely(qc->nbytes & 15)) |
| 4851 | return 1; |
Albert Lee | 6f23a31 | 2007-04-02 11:39:25 +0800 | [diff] [blame] | 4852 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4853 | if (ap->ops->check_atapi_dma) |
Tejun Heo | b9a4197 | 2007-06-27 02:48:43 +0900 | [diff] [blame] | 4854 | return ap->ops->check_atapi_dma(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4855 | |
Tejun Heo | b9a4197 | 2007-06-27 02:48:43 +0900 | [diff] [blame] | 4856 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4857 | } |
Tejun Heo | b9a4197 | 2007-06-27 02:48:43 +0900 | [diff] [blame] | 4858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4859 | /** |
Tejun Heo | 31cc23b | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 4860 | * ata_std_qc_defer - Check whether a qc needs to be deferred |
| 4861 | * @qc: ATA command in question |
| 4862 | * |
| 4863 | * Non-NCQ commands cannot run with any other command, NCQ or |
| 4864 | * not. As upper layer only knows the queue depth, we are |
| 4865 | * responsible for maintaining exclusion. This function checks |
| 4866 | * whether a new command @qc can be issued. |
| 4867 | * |
| 4868 | * LOCKING: |
| 4869 | * spin_lock_irqsave(host lock) |
| 4870 | * |
| 4871 | * RETURNS: |
| 4872 | * ATA_DEFER_* if deferring is needed, 0 otherwise. |
| 4873 | */ |
| 4874 | int ata_std_qc_defer(struct ata_queued_cmd *qc) |
| 4875 | { |
| 4876 | struct ata_link *link = qc->dev->link; |
| 4877 | |
| 4878 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
| 4879 | if (!ata_tag_valid(link->active_tag)) |
| 4880 | return 0; |
| 4881 | } else { |
| 4882 | if (!ata_tag_valid(link->active_tag) && !link->sactive) |
| 4883 | return 0; |
| 4884 | } |
| 4885 | |
| 4886 | return ATA_DEFER_LINK; |
| 4887 | } |
| 4888 | |
| 4889 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4890 | * ata_qc_prep - Prepare taskfile for submission |
| 4891 | * @qc: Metadata associated with taskfile to be prepared |
| 4892 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 4893 | * Prepare ATA taskfile for submission. |
| 4894 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4895 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4896 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4897 | */ |
| 4898 | void ata_qc_prep(struct ata_queued_cmd *qc) |
| 4899 | { |
| 4900 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 4901 | return; |
| 4902 | |
| 4903 | ata_fill_sg(qc); |
| 4904 | } |
| 4905 | |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4906 | /** |
| 4907 | * ata_dumb_qc_prep - Prepare taskfile for submission |
| 4908 | * @qc: Metadata associated with taskfile to be prepared |
| 4909 | * |
| 4910 | * Prepare ATA taskfile for submission. |
| 4911 | * |
| 4912 | * LOCKING: |
| 4913 | * spin_lock_irqsave(host lock) |
| 4914 | */ |
| 4915 | void ata_dumb_qc_prep(struct ata_queued_cmd *qc) |
| 4916 | { |
| 4917 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 4918 | return; |
| 4919 | |
| 4920 | ata_fill_sg_dumb(qc); |
| 4921 | } |
| 4922 | |
Brian King | e46834c | 2006-03-17 17:04:03 -0600 | [diff] [blame] | 4923 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
| 4924 | |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4925 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4926 | * ata_sg_init - Associate command with scatter-gather table. |
| 4927 | * @qc: Command to be associated |
| 4928 | * @sg: Scatter-gather table. |
| 4929 | * @n_elem: Number of elements in s/g table. |
| 4930 | * |
| 4931 | * Initialize the data-related elements of queued_cmd @qc |
| 4932 | * to point to a scatter-gather table @sg, containing @n_elem |
| 4933 | * elements. |
| 4934 | * |
| 4935 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4936 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4937 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4938 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
| 4939 | unsigned int n_elem) |
| 4940 | { |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4941 | qc->sg = sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4942 | qc->n_elem = n_elem; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 4943 | qc->cursg = qc->sg; |
| 4944 | } |
| 4945 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4946 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4947 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
| 4948 | * @qc: Command with scatter-gather table to be mapped. |
| 4949 | * |
| 4950 | * DMA-map the scatter-gather table associated with queued_cmd @qc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4951 | * |
| 4952 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4953 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4954 | * |
| 4955 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4956 | * Zero on success, negative on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4957 | * |
| 4958 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4959 | static int ata_sg_setup(struct ata_queued_cmd *qc) |
| 4960 | { |
| 4961 | struct ata_port *ap = qc->ap; |
James Bottomley | dde2020 | 2008-02-19 11:36:56 +0100 | [diff] [blame] | 4962 | unsigned int n_elem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4963 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 4964 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4965 | |
James Bottomley | dde2020 | 2008-02-19 11:36:56 +0100 | [diff] [blame] | 4966 | n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); |
| 4967 | if (n_elem < 1) |
| 4968 | return -1; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4969 | |
James Bottomley | dde2020 | 2008-02-19 11:36:56 +0100 | [diff] [blame] | 4970 | DPRINTK("%d sg elements mapped\n", n_elem); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4971 | |
James Bottomley | dde2020 | 2008-02-19 11:36:56 +0100 | [diff] [blame] | 4972 | qc->n_elem = n_elem; |
Tejun Heo | f92a263 | 2007-12-05 16:43:10 +0900 | [diff] [blame] | 4973 | qc->flags |= ATA_QCFLAG_DMAMAP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4974 | |
| 4975 | return 0; |
| 4976 | } |
| 4977 | |
| 4978 | /** |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 4979 | * swap_buf_le16 - swap halves of 16-bit words in place |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4980 | * @buf: Buffer to swap |
| 4981 | * @buf_words: Number of 16-bit words in buffer. |
| 4982 | * |
| 4983 | * Swap halves of 16-bit words if needed to convert from |
| 4984 | * little-endian byte order to native cpu byte order, or |
| 4985 | * vice-versa. |
| 4986 | * |
| 4987 | * LOCKING: |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 4988 | * Inherited from caller. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4989 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4990 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
| 4991 | { |
| 4992 | #ifdef __BIG_ENDIAN |
| 4993 | unsigned int i; |
| 4994 | |
| 4995 | for (i = 0; i < buf_words; i++) |
| 4996 | buf[i] = le16_to_cpu(buf[i]); |
| 4997 | #endif /* __BIG_ENDIAN */ |
| 4998 | } |
| 4999 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5000 | /** |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 5001 | * ata_data_xfer - Transfer data by PIO |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5002 | * @dev: device to target |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5003 | * @buf: data buffer |
| 5004 | * @buflen: buffer length |
Linus Nilsson | 0affa45 | 2008-01-28 15:56:27 +0100 | [diff] [blame] | 5005 | * @rw: read/write |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5006 | * |
| 5007 | * Transfer data from/to the device data register by PIO. |
| 5008 | * |
| 5009 | * LOCKING: |
| 5010 | * Inherited from caller. |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5011 | * |
| 5012 | * RETURNS: |
| 5013 | * Bytes consumed. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5014 | */ |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5015 | unsigned int ata_data_xfer(struct ata_device *dev, unsigned char *buf, |
| 5016 | unsigned int buflen, int rw) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5017 | { |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5018 | struct ata_port *ap = dev->link->ap; |
| 5019 | void __iomem *data_addr = ap->ioaddr.data_addr; |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5020 | unsigned int words = buflen >> 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5021 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5022 | /* Transfer multiple of 2 bytes */ |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5023 | if (rw == READ) |
| 5024 | ioread16_rep(data_addr, buf, words); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5025 | else |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5026 | iowrite16_rep(data_addr, buf, words); |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5027 | |
| 5028 | /* Transfer trailing 1 byte, if any. */ |
| 5029 | if (unlikely(buflen & 0x01)) { |
Al Viro | 4ca4e43 | 2007-12-30 09:32:22 +0000 | [diff] [blame] | 5030 | __le16 align_buf[1] = { 0 }; |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5031 | unsigned char *trailing_buf = buf + buflen - 1; |
| 5032 | |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5033 | if (rw == READ) { |
| 5034 | align_buf[0] = cpu_to_le16(ioread16(data_addr)); |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5035 | memcpy(trailing_buf, align_buf, 1); |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5036 | } else { |
| 5037 | memcpy(align_buf, trailing_buf, 1); |
| 5038 | iowrite16(le16_to_cpu(align_buf[0]), data_addr); |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5039 | } |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5040 | words++; |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5041 | } |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5042 | |
| 5043 | return words << 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5044 | } |
| 5045 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5046 | /** |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 5047 | * ata_data_xfer_noirq - Transfer data by PIO |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5048 | * @dev: device to target |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 5049 | * @buf: data buffer |
| 5050 | * @buflen: buffer length |
Linus Nilsson | 0affa45 | 2008-01-28 15:56:27 +0100 | [diff] [blame] | 5051 | * @rw: read/write |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 5052 | * |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 5053 | * Transfer data from/to the device data register by PIO. Do the |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 5054 | * transfer with interrupts disabled. |
| 5055 | * |
| 5056 | * LOCKING: |
| 5057 | * Inherited from caller. |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5058 | * |
| 5059 | * RETURNS: |
| 5060 | * Bytes consumed. |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 5061 | */ |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5062 | unsigned int ata_data_xfer_noirq(struct ata_device *dev, unsigned char *buf, |
| 5063 | unsigned int buflen, int rw) |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 5064 | { |
| 5065 | unsigned long flags; |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5066 | unsigned int consumed; |
| 5067 | |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 5068 | local_irq_save(flags); |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5069 | consumed = ata_data_xfer(dev, buf, buflen, rw); |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 5070 | local_irq_restore(flags); |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 5071 | |
| 5072 | return consumed; |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 5073 | } |
| 5074 | |
| 5075 | |
| 5076 | /** |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 5077 | * ata_pio_sector - Transfer a sector of data. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5078 | * @qc: Command on going |
| 5079 | * |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 5080 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5081 | * |
| 5082 | * LOCKING: |
| 5083 | * Inherited from caller. |
| 5084 | */ |
| 5085 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5086 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
| 5087 | { |
| 5088 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5089 | struct ata_port *ap = qc->ap; |
| 5090 | struct page *page; |
| 5091 | unsigned int offset; |
| 5092 | unsigned char *buf; |
| 5093 | |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 5094 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 5095 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5096 | |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5097 | page = sg_page(qc->cursg); |
Jens Axboe | 8726021 | 2007-10-16 11:14:12 +0200 | [diff] [blame] | 5098 | offset = qc->cursg->offset + qc->cursg_ofs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5099 | |
| 5100 | /* get the current page and offset */ |
| 5101 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 5102 | offset %= PAGE_SIZE; |
| 5103 | |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 5104 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 5105 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 5106 | if (PageHighMem(page)) { |
| 5107 | unsigned long flags; |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 5108 | |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 5109 | /* FIXME: use a bounce buffer */ |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 5110 | local_irq_save(flags); |
| 5111 | buf = kmap_atomic(page, KM_IRQ0); |
Albert Lee | 083958d | 2005-10-09 09:47:31 -0400 | [diff] [blame] | 5112 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 5113 | /* do the actual data transfer */ |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 5114 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 5115 | |
| 5116 | kunmap_atomic(buf, KM_IRQ0); |
| 5117 | local_irq_restore(flags); |
| 5118 | } else { |
| 5119 | buf = page_address(page); |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 5120 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 5121 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5122 | |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 5123 | qc->curbytes += qc->sect_size; |
| 5124 | qc->cursg_ofs += qc->sect_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5125 | |
Jens Axboe | 8726021 | 2007-10-16 11:14:12 +0200 | [diff] [blame] | 5126 | if (qc->cursg_ofs == qc->cursg->length) { |
| 5127 | qc->cursg = sg_next(qc->cursg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5128 | qc->cursg_ofs = 0; |
| 5129 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5130 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5131 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5132 | /** |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 5133 | * ata_pio_sectors - Transfer one or many sectors. |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 5134 | * @qc: Command on going |
| 5135 | * |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 5136 | * Transfer one or many sectors of data from/to the |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 5137 | * ATA device for the DRQ request. |
| 5138 | * |
| 5139 | * LOCKING: |
| 5140 | * Inherited from caller. |
| 5141 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5142 | |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 5143 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
| 5144 | { |
| 5145 | if (is_multi_taskfile(&qc->tf)) { |
| 5146 | /* READ/WRITE MULTIPLE */ |
| 5147 | unsigned int nsect; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5148 | |
Jeff Garzik | 587005d | 2006-02-11 18:17:32 -0500 | [diff] [blame] | 5149 | WARN_ON(qc->dev->multi_count == 0); |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 5150 | |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 5151 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
Tejun Heo | 726f078 | 2007-01-03 17:30:39 +0900 | [diff] [blame] | 5152 | qc->dev->multi_count); |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 5153 | while (nsect--) |
| 5154 | ata_pio_sector(qc); |
| 5155 | } else |
| 5156 | ata_pio_sector(qc); |
Albert Lee | 4cc980b | 2007-08-15 03:19:45 -0400 | [diff] [blame] | 5157 | |
| 5158 | ata_altstatus(qc->ap); /* flush */ |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 5159 | } |
| 5160 | |
| 5161 | /** |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 5162 | * atapi_send_cdb - Write CDB bytes to hardware |
| 5163 | * @ap: Port to which ATAPI device is attached. |
| 5164 | * @qc: Taskfile currently active |
| 5165 | * |
| 5166 | * When device has indicated its readiness to accept |
| 5167 | * a CDB, this function is called. Send the CDB. |
| 5168 | * |
| 5169 | * LOCKING: |
| 5170 | * caller. |
| 5171 | */ |
| 5172 | |
| 5173 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) |
| 5174 | { |
| 5175 | /* send SCSI cdb */ |
| 5176 | DPRINTK("send cdb\n"); |
Jeff Garzik | db024d5 | 2006-02-13 00:23:57 -0500 | [diff] [blame] | 5177 | WARN_ON(qc->dev->cdb_len < 12); |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 5178 | |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 5179 | ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 5180 | ata_altstatus(ap); /* flush */ |
| 5181 | |
| 5182 | switch (qc->tf.protocol) { |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 5183 | case ATAPI_PROT_PIO: |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 5184 | ap->hsm_task_state = HSM_ST; |
| 5185 | break; |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 5186 | case ATAPI_PROT_NODATA: |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 5187 | ap->hsm_task_state = HSM_ST_LAST; |
| 5188 | break; |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 5189 | case ATAPI_PROT_DMA: |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 5190 | ap->hsm_task_state = HSM_ST_LAST; |
| 5191 | /* initiate bmdma */ |
| 5192 | ap->ops->bmdma_start(qc); |
| 5193 | break; |
| 5194 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5195 | } |
| 5196 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5197 | /** |
| 5198 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 5199 | * @qc: Command on going |
| 5200 | * @bytes: number of bytes |
| 5201 | * |
| 5202 | * Transfer Transfer data from/to the ATAPI device. |
| 5203 | * |
| 5204 | * LOCKING: |
| 5205 | * Inherited from caller. |
| 5206 | * |
| 5207 | */ |
Tejun Heo | 140b5e5 | 2007-12-12 12:21:52 +0900 | [diff] [blame] | 5208 | static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5209 | { |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5210 | int rw = (qc->tf.flags & ATA_TFLAG_WRITE) ? WRITE : READ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5211 | struct ata_port *ap = qc->ap; |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5212 | struct ata_device *dev = qc->dev; |
| 5213 | struct ata_eh_info *ehi = &dev->link->eh_info; |
Tejun Heo | 140b5e5 | 2007-12-12 12:21:52 +0900 | [diff] [blame] | 5214 | struct scatterlist *sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5215 | struct page *page; |
| 5216 | unsigned char *buf; |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5217 | unsigned int offset, count, consumed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5218 | |
| 5219 | next_sg: |
Tejun Heo | 140b5e5 | 2007-12-12 12:21:52 +0900 | [diff] [blame] | 5220 | sg = qc->cursg; |
| 5221 | if (unlikely(!sg)) { |
James Bottomley | fa2fc7f | 2008-02-19 11:36:57 +0100 | [diff] [blame] | 5222 | ata_ehi_push_desc(ehi, "unexpected or too much trailing data " |
| 5223 | "buf=%u cur=%u bytes=%u", |
| 5224 | qc->nbytes, qc->curbytes, bytes); |
| 5225 | return -1; |
Tejun Heo | 140b5e5 | 2007-12-12 12:21:52 +0900 | [diff] [blame] | 5226 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5227 | |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 5228 | page = sg_page(sg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5229 | offset = sg->offset + qc->cursg_ofs; |
| 5230 | |
| 5231 | /* get the current page and offset */ |
| 5232 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 5233 | offset %= PAGE_SIZE; |
| 5234 | |
Albert Lee | 6952df0 | 2005-06-06 15:56:03 +0800 | [diff] [blame] | 5235 | /* don't overrun current sg */ |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 5236 | count = min(sg->length - qc->cursg_ofs, bytes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5237 | |
| 5238 | /* don't cross page boundaries */ |
| 5239 | count = min(count, (unsigned int)PAGE_SIZE - offset); |
| 5240 | |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 5241 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 5242 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 5243 | if (PageHighMem(page)) { |
| 5244 | unsigned long flags; |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 5245 | |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 5246 | /* FIXME: use bounce buffer */ |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 5247 | local_irq_save(flags); |
| 5248 | buf = kmap_atomic(page, KM_IRQ0); |
Albert Lee | 083958d | 2005-10-09 09:47:31 -0400 | [diff] [blame] | 5249 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 5250 | /* do the actual data transfer */ |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5251 | consumed = ap->ops->data_xfer(dev, buf + offset, count, rw); |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 5252 | |
| 5253 | kunmap_atomic(buf, KM_IRQ0); |
| 5254 | local_irq_restore(flags); |
| 5255 | } else { |
| 5256 | buf = page_address(page); |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5257 | consumed = ap->ops->data_xfer(dev, buf + offset, count, rw); |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 5258 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5259 | |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5260 | bytes -= min(bytes, consumed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5261 | qc->curbytes += count; |
| 5262 | qc->cursg_ofs += count; |
| 5263 | |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 5264 | if (qc->cursg_ofs == sg->length) { |
Jens Axboe | 8726021 | 2007-10-16 11:14:12 +0200 | [diff] [blame] | 5265 | qc->cursg = sg_next(qc->cursg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5266 | qc->cursg_ofs = 0; |
| 5267 | } |
| 5268 | |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5269 | /* consumed can be larger than count only for the last transfer */ |
| 5270 | WARN_ON(qc->cursg && count != consumed); |
| 5271 | |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 5272 | if (bytes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5273 | goto next_sg; |
Tejun Heo | 140b5e5 | 2007-12-12 12:21:52 +0900 | [diff] [blame] | 5274 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5275 | } |
| 5276 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5277 | /** |
| 5278 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 5279 | * @qc: Command on going |
| 5280 | * |
| 5281 | * Transfer Transfer data from/to the ATAPI device. |
| 5282 | * |
| 5283 | * LOCKING: |
| 5284 | * Inherited from caller. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 5285 | */ |
| 5286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5287 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
| 5288 | { |
| 5289 | struct ata_port *ap = qc->ap; |
| 5290 | struct ata_device *dev = qc->dev; |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5291 | struct ata_eh_info *ehi = &dev->link->eh_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5292 | unsigned int ireason, bc_lo, bc_hi, bytes; |
| 5293 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; |
| 5294 | |
Albert Lee | eec4c3f | 2006-05-18 17:51:10 +0800 | [diff] [blame] | 5295 | /* Abuse qc->result_tf for temp storage of intermediate TF |
| 5296 | * here to save some kernel stack usage. |
| 5297 | * For normal completion, qc->result_tf is not relevant. For |
| 5298 | * error, qc->result_tf is later overwritten by ata_qc_complete(). |
| 5299 | * So, the correctness of qc->result_tf is not affected. |
| 5300 | */ |
| 5301 | ap->ops->tf_read(ap, &qc->result_tf); |
| 5302 | ireason = qc->result_tf.nsect; |
| 5303 | bc_lo = qc->result_tf.lbam; |
| 5304 | bc_hi = qc->result_tf.lbah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5305 | bytes = (bc_hi << 8) | bc_lo; |
| 5306 | |
| 5307 | /* shall be cleared to zero, indicating xfer of data */ |
Albert Lee | 0106372 | 2007-12-05 16:43:02 +0900 | [diff] [blame] | 5308 | if (unlikely(ireason & (1 << 0))) |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5309 | goto atapi_check; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5310 | |
| 5311 | /* make sure transfer direction matches expected */ |
| 5312 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; |
Albert Lee | 0106372 | 2007-12-05 16:43:02 +0900 | [diff] [blame] | 5313 | if (unlikely(do_write != i_write)) |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5314 | goto atapi_check; |
Albert Lee | 0106372 | 2007-12-05 16:43:02 +0900 | [diff] [blame] | 5315 | |
| 5316 | if (unlikely(!bytes)) |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5317 | goto atapi_check; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5318 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5319 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5320 | |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5321 | if (unlikely(__atapi_pio_bytes(qc, bytes))) |
Tejun Heo | 140b5e5 | 2007-12-12 12:21:52 +0900 | [diff] [blame] | 5322 | goto err_out; |
Albert Lee | 4cc980b | 2007-08-15 03:19:45 -0400 | [diff] [blame] | 5323 | ata_altstatus(ap); /* flush */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5324 | |
| 5325 | return; |
| 5326 | |
Tejun Heo | 56c819d | 2008-02-19 11:35:37 +0100 | [diff] [blame] | 5327 | atapi_check: |
| 5328 | ata_ehi_push_desc(ehi, "ATAPI check failed (ireason=0x%x bytes=%u)", |
| 5329 | ireason, bytes); |
| 5330 | err_out: |
Tejun Heo | 11a56d2 | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5331 | qc->err_mask |= AC_ERR_HSM; |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 5332 | ap->hsm_task_state = HSM_ST_ERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5333 | } |
| 5334 | |
| 5335 | /** |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 5336 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
| 5337 | * @ap: the target ata_port |
| 5338 | * @qc: qc on going |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5339 | * |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 5340 | * RETURNS: |
| 5341 | * 1 if ok in workqueue, 0 otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5342 | */ |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 5343 | |
| 5344 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5345 | { |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 5346 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 5347 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5348 | |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 5349 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
| 5350 | if (qc->tf.protocol == ATA_PROT_PIO && |
| 5351 | (qc->tf.flags & ATA_TFLAG_WRITE)) |
| 5352 | return 1; |
| 5353 | |
Tejun Heo | 405e66b | 2007-11-27 19:28:53 +0900 | [diff] [blame] | 5354 | if (ata_is_atapi(qc->tf.protocol) && |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 5355 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
| 5356 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5357 | } |
| 5358 | |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 5359 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5360 | } |
| 5361 | |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 5362 | /** |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5363 | * ata_hsm_qc_complete - finish a qc running on standard HSM |
| 5364 | * @qc: Command to complete |
| 5365 | * @in_wq: 1 if called from workqueue, 0 otherwise |
| 5366 | * |
| 5367 | * Finish @qc which is running on standard HSM. |
| 5368 | * |
| 5369 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5370 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5371 | * Otherwise, none on entry and grabs host lock. |
| 5372 | */ |
| 5373 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) |
| 5374 | { |
| 5375 | struct ata_port *ap = qc->ap; |
| 5376 | unsigned long flags; |
| 5377 | |
| 5378 | if (ap->ops->error_handler) { |
| 5379 | if (in_wq) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 5380 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5381 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5382 | /* EH might have kicked in while host lock is |
| 5383 | * released. |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5384 | */ |
| 5385 | qc = ata_qc_from_tag(ap, qc->tag); |
| 5386 | if (qc) { |
| 5387 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 5388 | ap->ops->irq_on(ap); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5389 | ata_qc_complete(qc); |
| 5390 | } else |
| 5391 | ata_port_freeze(ap); |
| 5392 | } |
| 5393 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 5394 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5395 | } else { |
| 5396 | if (likely(!(qc->err_mask & AC_ERR_HSM))) |
| 5397 | ata_qc_complete(qc); |
| 5398 | else |
| 5399 | ata_port_freeze(ap); |
| 5400 | } |
| 5401 | } else { |
| 5402 | if (in_wq) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 5403 | spin_lock_irqsave(ap->lock, flags); |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 5404 | ap->ops->irq_on(ap); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5405 | ata_qc_complete(qc); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 5406 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5407 | } else |
| 5408 | ata_qc_complete(qc); |
| 5409 | } |
| 5410 | } |
| 5411 | |
| 5412 | /** |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5413 | * ata_hsm_move - move the HSM to the next state. |
| 5414 | * @ap: the target ata_port |
| 5415 | * @qc: qc on going |
| 5416 | * @status: current device status |
| 5417 | * @in_wq: 1 if called from workqueue, 0 otherwise |
| 5418 | * |
| 5419 | * RETURNS: |
| 5420 | * 1 when poll next status needed, 0 otherwise. |
| 5421 | */ |
Tejun Heo | 9a1004d | 2006-05-31 18:27:52 +0900 | [diff] [blame] | 5422 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
| 5423 | u8 status, int in_wq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5424 | { |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5425 | unsigned long flags = 0; |
| 5426 | int poll_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5427 | |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 5428 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
Albert Lee | 0565c26 | 2006-02-13 18:55:25 +0800 | [diff] [blame] | 5429 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5430 | /* Make sure ata_qc_issue_prot() does not throw things |
| 5431 | * like DMA polling into the workqueue. Notice that |
| 5432 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). |
Albert Lee | 1c84898 | 2005-12-05 15:40:15 +0800 | [diff] [blame] | 5433 | */ |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 5434 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
Albert Lee | 1c84898 | 2005-12-05 15:40:15 +0800 | [diff] [blame] | 5435 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5436 | fsm_start: |
Albert Lee | 999bb6f | 2006-03-25 18:07:48 +0800 | [diff] [blame] | 5437 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5438 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5439 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5440 | switch (ap->hsm_task_state) { |
| 5441 | case HSM_ST_FIRST: |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5442 | /* Send first data block or PACKET CDB */ |
| 5443 | |
| 5444 | /* If polling, we will stay in the work queue after |
| 5445 | * sending the data. Otherwise, interrupt handler |
| 5446 | * takes over after sending the data. |
| 5447 | */ |
| 5448 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); |
| 5449 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5450 | /* check device status */ |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 5451 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 5452 | /* handle BSY=0, DRQ=0 as error */ |
| 5453 | if (likely(status & (ATA_ERR | ATA_DF))) |
| 5454 | /* device stops HSM for abort/error */ |
| 5455 | qc->err_mask |= AC_ERR_DEV; |
| 5456 | else |
| 5457 | /* HSM violation. Let EH handle this */ |
| 5458 | qc->err_mask |= AC_ERR_HSM; |
| 5459 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5460 | ap->hsm_task_state = HSM_ST_ERR; |
| 5461 | goto fsm_start; |
| 5462 | } |
| 5463 | |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5464 | /* Device should not ask for data transfer (DRQ=1) |
| 5465 | * when it finds something wrong. |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 5466 | * We ignore DRQ here and stop the HSM by |
| 5467 | * changing hsm_task_state to HSM_ST_ERR and |
| 5468 | * let the EH abort the command or reset the device. |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5469 | */ |
| 5470 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Albert Lee | 2d3b8ee | 2007-11-15 10:35:46 +0900 | [diff] [blame] | 5471 | /* Some ATAPI tape drives forget to clear the ERR bit |
| 5472 | * when doing the next command (mostly request sense). |
| 5473 | * We ignore ERR here to workaround and proceed sending |
| 5474 | * the CDB. |
| 5475 | */ |
| 5476 | if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) { |
| 5477 | ata_port_printk(ap, KERN_WARNING, |
| 5478 | "DRQ=1 with device error, " |
| 5479 | "dev_stat 0x%X\n", status); |
| 5480 | qc->err_mask |= AC_ERR_HSM; |
| 5481 | ap->hsm_task_state = HSM_ST_ERR; |
| 5482 | goto fsm_start; |
| 5483 | } |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5484 | } |
| 5485 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5486 | /* Send the CDB (atapi) or the first data block (ata pio out). |
| 5487 | * During the state transition, interrupt handler shouldn't |
| 5488 | * be invoked before the data transfer is complete and |
| 5489 | * hsm_task_state is changed. Hence, the following locking. |
| 5490 | */ |
| 5491 | if (in_wq) |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 5492 | spin_lock_irqsave(ap->lock, flags); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5493 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5494 | if (qc->tf.protocol == ATA_PROT_PIO) { |
| 5495 | /* PIO data out protocol. |
| 5496 | * send first data block. |
| 5497 | */ |
| 5498 | |
| 5499 | /* ata_pio_sectors() might change the state |
| 5500 | * to HSM_ST_LAST. so, the state is changed here |
| 5501 | * before ata_pio_sectors(). |
| 5502 | */ |
| 5503 | ap->hsm_task_state = HSM_ST; |
| 5504 | ata_pio_sectors(qc); |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5505 | } else |
| 5506 | /* send CDB */ |
| 5507 | atapi_send_cdb(ap, qc); |
| 5508 | |
| 5509 | if (in_wq) |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 5510 | spin_unlock_irqrestore(ap->lock, flags); |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5511 | |
| 5512 | /* if polling, ata_pio_task() handles the rest. |
| 5513 | * otherwise, interrupt handler takes over from here. |
| 5514 | */ |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5515 | break; |
| 5516 | |
| 5517 | case HSM_ST: |
| 5518 | /* complete command or read/write the data register */ |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 5519 | if (qc->tf.protocol == ATAPI_PROT_PIO) { |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5520 | /* ATAPI PIO protocol */ |
| 5521 | if ((status & ATA_DRQ) == 0) { |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 5522 | /* No more data to transfer or device error. |
| 5523 | * Device error will be tagged in HSM_ST_LAST. |
| 5524 | */ |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5525 | ap->hsm_task_state = HSM_ST_LAST; |
| 5526 | goto fsm_start; |
| 5527 | } |
| 5528 | |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5529 | /* Device should not ask for data transfer (DRQ=1) |
| 5530 | * when it finds something wrong. |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 5531 | * We ignore DRQ here and stop the HSM by |
| 5532 | * changing hsm_task_state to HSM_ST_ERR and |
| 5533 | * let the EH abort the command or reset the device. |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5534 | */ |
| 5535 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5536 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " |
| 5537 | "device error, dev_stat 0x%X\n", |
| 5538 | status); |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 5539 | qc->err_mask |= AC_ERR_HSM; |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 5540 | ap->hsm_task_state = HSM_ST_ERR; |
| 5541 | goto fsm_start; |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5542 | } |
| 5543 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5544 | atapi_pio_bytes(qc); |
| 5545 | |
| 5546 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
| 5547 | /* bad ireason reported by device */ |
| 5548 | goto fsm_start; |
| 5549 | |
| 5550 | } else { |
| 5551 | /* ATA PIO protocol */ |
| 5552 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 5553 | /* handle BSY=0, DRQ=0 as error */ |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 5554 | if (likely(status & (ATA_ERR | ATA_DF))) |
| 5555 | /* device stops HSM for abort/error */ |
| 5556 | qc->err_mask |= AC_ERR_DEV; |
| 5557 | else |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 5558 | /* HSM violation. Let EH handle this. |
| 5559 | * Phantom devices also trigger this |
| 5560 | * condition. Mark hint. |
| 5561 | */ |
| 5562 | qc->err_mask |= AC_ERR_HSM | |
| 5563 | AC_ERR_NODEV_HINT; |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 5564 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5565 | ap->hsm_task_state = HSM_ST_ERR; |
| 5566 | goto fsm_start; |
| 5567 | } |
| 5568 | |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 5569 | /* For PIO reads, some devices may ask for |
| 5570 | * data transfer (DRQ=1) alone with ERR=1. |
| 5571 | * We respect DRQ here and transfer one |
| 5572 | * block of junk data before changing the |
| 5573 | * hsm_task_state to HSM_ST_ERR. |
| 5574 | * |
| 5575 | * For PIO writes, ERR=1 DRQ=1 doesn't make |
| 5576 | * sense since the data block has been |
| 5577 | * transferred to the device. |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5578 | */ |
| 5579 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5580 | /* data might be corrputed */ |
| 5581 | qc->err_mask |= AC_ERR_DEV; |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 5582 | |
| 5583 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { |
| 5584 | ata_pio_sectors(qc); |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 5585 | status = ata_wait_idle(ap); |
| 5586 | } |
| 5587 | |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 5588 | if (status & (ATA_BUSY | ATA_DRQ)) |
| 5589 | qc->err_mask |= AC_ERR_HSM; |
| 5590 | |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 5591 | /* ata_pio_sectors() might change the |
| 5592 | * state to HSM_ST_LAST. so, the state |
| 5593 | * is changed after ata_pio_sectors(). |
| 5594 | */ |
| 5595 | ap->hsm_task_state = HSM_ST_ERR; |
| 5596 | goto fsm_start; |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5597 | } |
| 5598 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5599 | ata_pio_sectors(qc); |
| 5600 | |
| 5601 | if (ap->hsm_task_state == HSM_ST_LAST && |
| 5602 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { |
| 5603 | /* all data read */ |
Albert Lee | 52a3220 | 2006-03-25 18:18:15 +0800 | [diff] [blame] | 5604 | status = ata_wait_idle(ap); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5605 | goto fsm_start; |
| 5606 | } |
| 5607 | } |
| 5608 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5609 | poll_next = 1; |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5610 | break; |
| 5611 | |
| 5612 | case HSM_ST_LAST: |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 5613 | if (unlikely(!ata_ok(status))) { |
| 5614 | qc->err_mask |= __ac_err_mask(status); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5615 | ap->hsm_task_state = HSM_ST_ERR; |
| 5616 | goto fsm_start; |
| 5617 | } |
| 5618 | |
| 5619 | /* no more data to transfer */ |
Albert Lee | 4332a77 | 2006-04-03 17:43:24 +0800 | [diff] [blame] | 5620 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5621 | ap->print_id, qc->dev->devno, status); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5622 | |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 5623 | WARN_ON(qc->err_mask); |
| 5624 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5625 | ap->hsm_task_state = HSM_ST_IDLE; |
| 5626 | |
| 5627 | /* complete taskfile transaction */ |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5628 | ata_hsm_qc_complete(qc, in_wq); |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5629 | |
| 5630 | poll_next = 0; |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5631 | break; |
| 5632 | |
| 5633 | case HSM_ST_ERR: |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5634 | /* make sure qc->err_mask is available to |
| 5635 | * know what's wrong and recover |
| 5636 | */ |
| 5637 | WARN_ON(qc->err_mask == 0); |
| 5638 | |
| 5639 | ap->hsm_task_state = HSM_ST_IDLE; |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5640 | |
Albert Lee | 999bb6f | 2006-03-25 18:07:48 +0800 | [diff] [blame] | 5641 | /* complete taskfile transaction */ |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5642 | ata_hsm_qc_complete(qc, in_wq); |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5643 | |
| 5644 | poll_next = 0; |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5645 | break; |
| 5646 | default: |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5647 | poll_next = 0; |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 5648 | BUG(); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5649 | } |
| 5650 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5651 | return poll_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5652 | } |
| 5653 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 5654 | static void ata_pio_task(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5655 | { |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 5656 | struct ata_port *ap = |
| 5657 | container_of(work, struct ata_port, port_task.work); |
| 5658 | struct ata_queued_cmd *qc = ap->port_task_data; |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 5659 | u8 status; |
| 5660 | int poll_next; |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 5661 | |
| 5662 | fsm_start: |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 5663 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5664 | |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 5665 | /* |
| 5666 | * This is purely heuristic. This is a fast path. |
| 5667 | * Sometimes when we enter, BSY will be cleared in |
| 5668 | * a chk-status or two. If not, the drive is probably seeking |
| 5669 | * or something. Snooze for a couple msecs, then |
| 5670 | * chk-status again. If still busy, queue delayed work. |
| 5671 | */ |
| 5672 | status = ata_busy_wait(ap, ATA_BUSY, 5); |
| 5673 | if (status & ATA_BUSY) { |
| 5674 | msleep(2); |
| 5675 | status = ata_busy_wait(ap, ATA_BUSY, 10); |
| 5676 | if (status & ATA_BUSY) { |
Jeff Garzik | 442eacc | 2007-12-19 04:25:10 -0500 | [diff] [blame] | 5677 | ata_pio_queue_task(ap, qc, ATA_SHORT_PAUSE); |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 5678 | return; |
| 5679 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5680 | } |
| 5681 | |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 5682 | /* move the HSM */ |
| 5683 | poll_next = ata_hsm_move(ap, qc, status, 1); |
| 5684 | |
| 5685 | /* another command or interrupt handler |
| 5686 | * may be running at this point. |
| 5687 | */ |
| 5688 | if (poll_next) |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 5689 | goto fsm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5690 | } |
| 5691 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5692 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5693 | * ata_qc_new - Request an available ATA command, for queueing |
| 5694 | * @ap: Port associated with device @dev |
| 5695 | * @dev: Device from whom we request an available command structure |
| 5696 | * |
| 5697 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5698 | * None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5699 | */ |
| 5700 | |
| 5701 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) |
| 5702 | { |
| 5703 | struct ata_queued_cmd *qc = NULL; |
| 5704 | unsigned int i; |
| 5705 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 5706 | /* no command while frozen */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 5707 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 5708 | return NULL; |
| 5709 | |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 5710 | /* the last tag is reserved for internal command. */ |
| 5711 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) |
Tejun Heo | 6cec4a3 | 2006-05-15 21:03:41 +0900 | [diff] [blame] | 5712 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
Tejun Heo | f69499f | 2006-05-15 20:58:03 +0900 | [diff] [blame] | 5713 | qc = __ata_qc_from_tag(ap, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5714 | break; |
| 5715 | } |
| 5716 | |
| 5717 | if (qc) |
| 5718 | qc->tag = i; |
| 5719 | |
| 5720 | return qc; |
| 5721 | } |
| 5722 | |
| 5723 | /** |
| 5724 | * ata_qc_new_init - Request an available ATA command, and initialize it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5725 | * @dev: Device from whom we request an available command structure |
| 5726 | * |
| 5727 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5728 | * None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5729 | */ |
| 5730 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 5731 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5732 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 5733 | struct ata_port *ap = dev->link->ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5734 | struct ata_queued_cmd *qc; |
| 5735 | |
| 5736 | qc = ata_qc_new(ap); |
| 5737 | if (qc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5738 | qc->scsicmd = NULL; |
| 5739 | qc->ap = ap; |
| 5740 | qc->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5741 | |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 5742 | ata_qc_reinit(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5743 | } |
| 5744 | |
| 5745 | return qc; |
| 5746 | } |
| 5747 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5748 | /** |
| 5749 | * ata_qc_free - free unused ata_queued_cmd |
| 5750 | * @qc: Command to complete |
| 5751 | * |
| 5752 | * Designed to free unused ata_queued_cmd object |
| 5753 | * in case something prevents using it. |
| 5754 | * |
| 5755 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5756 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5757 | */ |
| 5758 | void ata_qc_free(struct ata_queued_cmd *qc) |
| 5759 | { |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5760 | struct ata_port *ap = qc->ap; |
| 5761 | unsigned int tag; |
| 5762 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 5763 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5764 | |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5765 | qc->flags = 0; |
| 5766 | tag = qc->tag; |
| 5767 | if (likely(ata_tag_valid(tag))) { |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5768 | qc->tag = ATA_TAG_POISON; |
Tejun Heo | 6cec4a3 | 2006-05-15 21:03:41 +0900 | [diff] [blame] | 5769 | clear_bit(tag, &ap->qc_allocated); |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5770 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5771 | } |
| 5772 | |
Tejun Heo | 7601442 | 2006-02-11 15:13:49 +0900 | [diff] [blame] | 5773 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5774 | { |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5775 | struct ata_port *ap = qc->ap; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 5776 | struct ata_link *link = qc->dev->link; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5777 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 5778 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
| 5779 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5780 | |
| 5781 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 5782 | ata_sg_clean(qc); |
| 5783 | |
Tejun Heo | 7401abf | 2006-05-15 20:57:32 +0900 | [diff] [blame] | 5784 | /* command should be marked inactive atomically with qc completion */ |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 5785 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 5786 | link->sactive &= ~(1 << qc->tag); |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 5787 | if (!link->sactive) |
| 5788 | ap->nr_active_links--; |
| 5789 | } else { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 5790 | link->active_tag = ATA_TAG_POISON; |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 5791 | ap->nr_active_links--; |
| 5792 | } |
| 5793 | |
| 5794 | /* clear exclusive status */ |
| 5795 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && |
| 5796 | ap->excl_link == link)) |
| 5797 | ap->excl_link = NULL; |
Tejun Heo | 7401abf | 2006-05-15 20:57:32 +0900 | [diff] [blame] | 5798 | |
Albert Lee | 3f3791d | 2005-08-16 14:25:38 +0800 | [diff] [blame] | 5799 | /* atapi: mark qc as inactive to prevent the interrupt handler |
| 5800 | * from completing the command twice later, before the error handler |
| 5801 | * is called. (when rc != 0 and atapi request sense is needed) |
| 5802 | */ |
| 5803 | qc->flags &= ~ATA_QCFLAG_ACTIVE; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5804 | ap->qc_active &= ~(1 << qc->tag); |
Albert Lee | 3f3791d | 2005-08-16 14:25:38 +0800 | [diff] [blame] | 5805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5806 | /* call completion callback */ |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5807 | qc->complete_fn(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5808 | } |
| 5809 | |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5810 | static void fill_result_tf(struct ata_queued_cmd *qc) |
| 5811 | { |
| 5812 | struct ata_port *ap = qc->ap; |
| 5813 | |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5814 | qc->result_tf.flags = qc->tf.flags; |
Mark Lord | 4742d54 | 2007-04-02 16:20:35 -0400 | [diff] [blame] | 5815 | ap->ops->tf_read(ap, &qc->result_tf); |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5816 | } |
| 5817 | |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 5818 | static void ata_verify_xfer(struct ata_queued_cmd *qc) |
| 5819 | { |
| 5820 | struct ata_device *dev = qc->dev; |
| 5821 | |
| 5822 | if (ata_tag_internal(qc->tag)) |
| 5823 | return; |
| 5824 | |
| 5825 | if (ata_is_nodata(qc->tf.protocol)) |
| 5826 | return; |
| 5827 | |
| 5828 | if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) |
| 5829 | return; |
| 5830 | |
| 5831 | dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; |
| 5832 | } |
| 5833 | |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5834 | /** |
| 5835 | * ata_qc_complete - Complete an active ATA command |
| 5836 | * @qc: Command to complete |
| 5837 | * @err_mask: ATA Status register contents |
| 5838 | * |
| 5839 | * Indicate to the mid and upper layers that an ATA |
| 5840 | * command has completed, with either an ok or not-ok status. |
| 5841 | * |
| 5842 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5843 | * spin_lock_irqsave(host lock) |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5844 | */ |
| 5845 | void ata_qc_complete(struct ata_queued_cmd *qc) |
| 5846 | { |
| 5847 | struct ata_port *ap = qc->ap; |
| 5848 | |
| 5849 | /* XXX: New EH and old EH use different mechanisms to |
| 5850 | * synchronize EH with regular execution path. |
| 5851 | * |
| 5852 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. |
| 5853 | * Normal execution path is responsible for not accessing a |
| 5854 | * failed qc. libata core enforces the rule by returning NULL |
| 5855 | * from ata_qc_from_tag() for failed qcs. |
| 5856 | * |
| 5857 | * Old EH depends on ata_qc_complete() nullifying completion |
| 5858 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does |
| 5859 | * not synchronize with interrupt handler. Only PIO task is |
| 5860 | * taken care of. |
| 5861 | */ |
| 5862 | if (ap->ops->error_handler) { |
Tejun Heo | 4dbfa39 | 2007-10-25 18:22:44 +0900 | [diff] [blame] | 5863 | struct ata_device *dev = qc->dev; |
| 5864 | struct ata_eh_info *ehi = &dev->link->eh_info; |
| 5865 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 5866 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5867 | |
| 5868 | if (unlikely(qc->err_mask)) |
| 5869 | qc->flags |= ATA_QCFLAG_FAILED; |
| 5870 | |
| 5871 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { |
| 5872 | if (!ata_tag_internal(qc->tag)) { |
| 5873 | /* always fill result TF for failed qc */ |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5874 | fill_result_tf(qc); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5875 | ata_qc_schedule_eh(qc); |
| 5876 | return; |
| 5877 | } |
| 5878 | } |
| 5879 | |
| 5880 | /* read result TF if requested */ |
| 5881 | if (qc->flags & ATA_QCFLAG_RESULT_TF) |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5882 | fill_result_tf(qc); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5883 | |
Tejun Heo | 4dbfa39 | 2007-10-25 18:22:44 +0900 | [diff] [blame] | 5884 | /* Some commands need post-processing after successful |
| 5885 | * completion. |
| 5886 | */ |
| 5887 | switch (qc->tf.command) { |
| 5888 | case ATA_CMD_SET_FEATURES: |
| 5889 | if (qc->tf.feature != SETFEATURES_WC_ON && |
| 5890 | qc->tf.feature != SETFEATURES_WC_OFF) |
| 5891 | break; |
| 5892 | /* fall through */ |
| 5893 | case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ |
| 5894 | case ATA_CMD_SET_MULTI: /* multi_count changed */ |
| 5895 | /* revalidate device */ |
| 5896 | ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; |
| 5897 | ata_port_schedule_eh(ap); |
| 5898 | break; |
Tejun Heo | 054a5fb | 2007-10-25 18:30:36 +0900 | [diff] [blame] | 5899 | |
| 5900 | case ATA_CMD_SLEEP: |
| 5901 | dev->flags |= ATA_DFLAG_SLEEPING; |
| 5902 | break; |
Tejun Heo | 4dbfa39 | 2007-10-25 18:22:44 +0900 | [diff] [blame] | 5903 | } |
| 5904 | |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 5905 | if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) |
| 5906 | ata_verify_xfer(qc); |
| 5907 | |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5908 | __ata_qc_complete(qc); |
| 5909 | } else { |
| 5910 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) |
| 5911 | return; |
| 5912 | |
| 5913 | /* read result TF if failed or requested */ |
| 5914 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5915 | fill_result_tf(qc); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5916 | |
| 5917 | __ata_qc_complete(qc); |
| 5918 | } |
| 5919 | } |
| 5920 | |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5921 | /** |
| 5922 | * ata_qc_complete_multiple - Complete multiple qcs successfully |
| 5923 | * @ap: port in question |
| 5924 | * @qc_active: new qc_active mask |
| 5925 | * @finish_qc: LLDD callback invoked before completing a qc |
| 5926 | * |
| 5927 | * Complete in-flight commands. This functions is meant to be |
| 5928 | * called from low-level driver's interrupt routine to complete |
| 5929 | * requests normally. ap->qc_active and @qc_active is compared |
| 5930 | * and commands are completed accordingly. |
| 5931 | * |
| 5932 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5933 | * spin_lock_irqsave(host lock) |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5934 | * |
| 5935 | * RETURNS: |
| 5936 | * Number of completed commands on success, -errno otherwise. |
| 5937 | */ |
| 5938 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, |
| 5939 | void (*finish_qc)(struct ata_queued_cmd *)) |
| 5940 | { |
| 5941 | int nr_done = 0; |
| 5942 | u32 done_mask; |
| 5943 | int i; |
| 5944 | |
| 5945 | done_mask = ap->qc_active ^ qc_active; |
| 5946 | |
| 5947 | if (unlikely(done_mask & qc_active)) { |
| 5948 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " |
| 5949 | "(%08x->%08x)\n", ap->qc_active, qc_active); |
| 5950 | return -EINVAL; |
| 5951 | } |
| 5952 | |
| 5953 | for (i = 0; i < ATA_MAX_QUEUE; i++) { |
| 5954 | struct ata_queued_cmd *qc; |
| 5955 | |
| 5956 | if (!(done_mask & (1 << i))) |
| 5957 | continue; |
| 5958 | |
| 5959 | if ((qc = ata_qc_from_tag(ap, i))) { |
| 5960 | if (finish_qc) |
| 5961 | finish_qc(qc); |
| 5962 | ata_qc_complete(qc); |
| 5963 | nr_done++; |
| 5964 | } |
| 5965 | } |
| 5966 | |
| 5967 | return nr_done; |
| 5968 | } |
| 5969 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5970 | /** |
| 5971 | * ata_qc_issue - issue taskfile to device |
| 5972 | * @qc: command to issue to device |
| 5973 | * |
| 5974 | * Prepare an ATA command to submission to device. |
| 5975 | * This includes mapping the data into a DMA-able |
| 5976 | * area, filling in the S/G table, and finally |
| 5977 | * writing the taskfile to hardware, starting the command. |
| 5978 | * |
| 5979 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5980 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5981 | */ |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 5982 | void ata_qc_issue(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5983 | { |
| 5984 | struct ata_port *ap = qc->ap; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 5985 | struct ata_link *link = qc->dev->link; |
Tejun Heo | 405e66b | 2007-11-27 19:28:53 +0900 | [diff] [blame] | 5986 | u8 prot = qc->tf.protocol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5987 | |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5988 | /* Make sure only one non-NCQ command is outstanding. The |
| 5989 | * check is skipped for old EH because it reuses active qc to |
| 5990 | * request ATAPI sense. |
| 5991 | */ |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 5992 | WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5993 | |
Tejun Heo | 1973a02 | 2007-12-05 10:36:13 +0900 | [diff] [blame] | 5994 | if (ata_is_ncq(prot)) { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 5995 | WARN_ON(link->sactive & (1 << qc->tag)); |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 5996 | |
| 5997 | if (!link->sactive) |
| 5998 | ap->nr_active_links++; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 5999 | link->sactive |= 1 << qc->tag; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 6000 | } else { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 6001 | WARN_ON(link->sactive); |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 6002 | |
| 6003 | ap->nr_active_links++; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 6004 | link->active_tag = qc->tag; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 6005 | } |
| 6006 | |
Tejun Heo | e4a70e7 | 2006-03-31 20:36:47 +0900 | [diff] [blame] | 6007 | qc->flags |= ATA_QCFLAG_ACTIVE; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 6008 | ap->qc_active |= 1 << qc->tag; |
Tejun Heo | e4a70e7 | 2006-03-31 20:36:47 +0900 | [diff] [blame] | 6009 | |
Tejun Heo | f92a263 | 2007-12-05 16:43:10 +0900 | [diff] [blame] | 6010 | /* We guarantee to LLDs that they will have at least one |
| 6011 | * non-zero sg if the command is a data command. |
| 6012 | */ |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 6013 | BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)); |
Tejun Heo | f92a263 | 2007-12-05 16:43:10 +0900 | [diff] [blame] | 6014 | |
Tejun Heo | 405e66b | 2007-11-27 19:28:53 +0900 | [diff] [blame] | 6015 | if (ata_is_dma(prot) || (ata_is_pio(prot) && |
Tejun Heo | f92a263 | 2007-12-05 16:43:10 +0900 | [diff] [blame] | 6016 | (ap->flags & ATA_FLAG_PIO_DMA))) |
Tejun Heo | 001102d | 2007-12-05 16:43:09 +0900 | [diff] [blame] | 6017 | if (ata_sg_setup(qc)) |
| 6018 | goto sg_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6019 | |
Tejun Heo | 054a5fb | 2007-10-25 18:30:36 +0900 | [diff] [blame] | 6020 | /* if device is sleeping, schedule softreset and abort the link */ |
| 6021 | if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { |
| 6022 | link->eh_info.action |= ATA_EH_SOFTRESET; |
| 6023 | ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); |
| 6024 | ata_link_abort(link); |
| 6025 | return; |
| 6026 | } |
| 6027 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6028 | ap->ops->qc_prep(qc); |
| 6029 | |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 6030 | qc->err_mask |= ap->ops->qc_issue(qc); |
| 6031 | if (unlikely(qc->err_mask)) |
| 6032 | goto err; |
| 6033 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6034 | |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 6035 | sg_err: |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 6036 | qc->err_mask |= AC_ERR_SYSTEM; |
| 6037 | err: |
| 6038 | ata_qc_complete(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6039 | } |
| 6040 | |
| 6041 | /** |
| 6042 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner |
| 6043 | * @qc: command to issue to device |
| 6044 | * |
| 6045 | * Using various libata functions and hooks, this function |
| 6046 | * starts an ATA command. ATA commands are grouped into |
| 6047 | * classes called "protocols", and issuing each type of protocol |
| 6048 | * is slightly different. |
| 6049 | * |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6050 | * May be used as the qc_issue() entry in ata_port_operations. |
| 6051 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6052 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6053 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6054 | * |
| 6055 | * RETURNS: |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 6056 | * Zero on success, AC_ERR_* mask on failure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6057 | */ |
| 6058 | |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 6059 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6060 | { |
| 6061 | struct ata_port *ap = qc->ap; |
| 6062 | |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 6063 | /* Use polling pio if the LLD doesn't handle |
| 6064 | * interrupt driven pio and atapi CDB interrupt. |
| 6065 | */ |
| 6066 | if (ap->flags & ATA_FLAG_PIO_POLLING) { |
| 6067 | switch (qc->tf.protocol) { |
| 6068 | case ATA_PROT_PIO: |
Albert Lee | e3472cb | 2006-12-07 11:37:58 +0800 | [diff] [blame] | 6069 | case ATA_PROT_NODATA: |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 6070 | case ATAPI_PROT_PIO: |
| 6071 | case ATAPI_PROT_NODATA: |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 6072 | qc->tf.flags |= ATA_TFLAG_POLLING; |
| 6073 | break; |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 6074 | case ATAPI_PROT_DMA: |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 6075 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) |
Albert Lee | 3a77827 | 2006-06-22 13:00:25 +0800 | [diff] [blame] | 6076 | /* see ata_dma_blacklisted() */ |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 6077 | BUG(); |
| 6078 | break; |
| 6079 | default: |
| 6080 | break; |
| 6081 | } |
| 6082 | } |
| 6083 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6084 | /* select the device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6085 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
| 6086 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6087 | /* start the command */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6088 | switch (qc->tf.protocol) { |
| 6089 | case ATA_PROT_NODATA: |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6090 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 6091 | ata_qc_set_polling(qc); |
| 6092 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 6093 | ata_tf_to_host(ap, &qc->tf); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6094 | ap->hsm_task_state = HSM_ST_LAST; |
| 6095 | |
| 6096 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
Jeff Garzik | 442eacc | 2007-12-19 04:25:10 -0500 | [diff] [blame] | 6097 | ata_pio_queue_task(ap, qc, 0); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6098 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6099 | break; |
| 6100 | |
| 6101 | case ATA_PROT_DMA: |
Jeff Garzik | 587005d | 2006-02-11 18:17:32 -0500 | [diff] [blame] | 6102 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6104 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 6105 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 6106 | ap->ops->bmdma_start(qc); /* initiate bmdma */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6107 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6108 | break; |
| 6109 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6110 | case ATA_PROT_PIO: |
| 6111 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 6112 | ata_qc_set_polling(qc); |
| 6113 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 6114 | ata_tf_to_host(ap, &qc->tf); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6115 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 6116 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 6117 | /* PIO data out protocol */ |
| 6118 | ap->hsm_task_state = HSM_ST_FIRST; |
Jeff Garzik | 442eacc | 2007-12-19 04:25:10 -0500 | [diff] [blame] | 6119 | ata_pio_queue_task(ap, qc, 0); |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 6120 | |
| 6121 | /* always send first data block using |
Albert Lee | e27486d | 2005-11-01 19:24:49 +0800 | [diff] [blame] | 6122 | * the ata_pio_task() codepath. |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 6123 | */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6124 | } else { |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 6125 | /* PIO data in protocol */ |
| 6126 | ap->hsm_task_state = HSM_ST; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6127 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 6128 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
Jeff Garzik | 442eacc | 2007-12-19 04:25:10 -0500 | [diff] [blame] | 6129 | ata_pio_queue_task(ap, qc, 0); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6130 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 6131 | /* if polling, ata_pio_task() handles the rest. |
| 6132 | * otherwise, interrupt handler takes over from here. |
| 6133 | */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6134 | } |
| 6135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6136 | break; |
| 6137 | |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 6138 | case ATAPI_PROT_PIO: |
| 6139 | case ATAPI_PROT_NODATA: |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6140 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 6141 | ata_qc_set_polling(qc); |
| 6142 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 6143 | ata_tf_to_host(ap, &qc->tf); |
Jeff Garzik | f6ef65e | 2006-01-27 02:45:00 -0500 | [diff] [blame] | 6144 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6145 | ap->hsm_task_state = HSM_ST_FIRST; |
| 6146 | |
| 6147 | /* send cdb by polling if no cdb interrupt */ |
| 6148 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || |
| 6149 | (qc->tf.flags & ATA_TFLAG_POLLING)) |
Jeff Garzik | 442eacc | 2007-12-19 04:25:10 -0500 | [diff] [blame] | 6150 | ata_pio_queue_task(ap, qc, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6151 | break; |
| 6152 | |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 6153 | case ATAPI_PROT_DMA: |
Jeff Garzik | 587005d | 2006-02-11 18:17:32 -0500 | [diff] [blame] | 6154 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6156 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 6157 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6158 | ap->hsm_task_state = HSM_ST_FIRST; |
| 6159 | |
| 6160 | /* send cdb by polling if no cdb interrupt */ |
| 6161 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Jeff Garzik | 442eacc | 2007-12-19 04:25:10 -0500 | [diff] [blame] | 6162 | ata_pio_queue_task(ap, qc, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6163 | break; |
| 6164 | |
| 6165 | default: |
| 6166 | WARN_ON(1); |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 6167 | return AC_ERR_SYSTEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6168 | } |
| 6169 | |
| 6170 | return 0; |
| 6171 | } |
| 6172 | |
| 6173 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6174 | * ata_host_intr - Handle host interrupt for given (port, task) |
| 6175 | * @ap: Port on which interrupt arrived (possibly...) |
| 6176 | * @qc: Taskfile currently active in engine |
| 6177 | * |
| 6178 | * Handle host interrupt for given queued command. Currently, |
| 6179 | * only DMA interrupts are handled. All other commands are |
| 6180 | * handled via polling with interrupts disabled (nIEN bit). |
| 6181 | * |
| 6182 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6183 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6184 | * |
| 6185 | * RETURNS: |
| 6186 | * One if interrupt was handled, zero if not (shared irq). |
| 6187 | */ |
| 6188 | |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 6189 | inline unsigned int ata_host_intr(struct ata_port *ap, |
| 6190 | struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6191 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 6192 | struct ata_eh_info *ehi = &ap->link.eh_info; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6193 | u8 status, host_stat = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6194 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6195 | VPRINTK("ata%u: protocol %d task_state %d\n", |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 6196 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6197 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6198 | /* Check whether we are expecting interrupt in this state */ |
| 6199 | switch (ap->hsm_task_state) { |
| 6200 | case HSM_ST_FIRST: |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 6201 | /* Some pre-ATAPI-4 devices assert INTRQ |
| 6202 | * at this state when ready to receive CDB. |
| 6203 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6204 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6205 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
Tejun Heo | 405e66b | 2007-11-27 19:28:53 +0900 | [diff] [blame] | 6206 | * The flag was turned on only for atapi devices. No |
| 6207 | * need to check ata_is_atapi(qc->tf.protocol) again. |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6208 | */ |
| 6209 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6210 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6211 | break; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6212 | case HSM_ST_LAST: |
| 6213 | if (qc->tf.protocol == ATA_PROT_DMA || |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 6214 | qc->tf.protocol == ATAPI_PROT_DMA) { |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6215 | /* check status of DMA engine */ |
| 6216 | host_stat = ap->ops->bmdma_status(ap); |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 6217 | VPRINTK("ata%u: host_stat 0x%X\n", |
| 6218 | ap->print_id, host_stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6219 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6220 | /* if it's not our irq... */ |
| 6221 | if (!(host_stat & ATA_DMA_INTR)) |
| 6222 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6223 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6224 | /* before we do anything else, clear DMA-Start bit */ |
| 6225 | ap->ops->bmdma_stop(qc); |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 6226 | |
| 6227 | if (unlikely(host_stat & ATA_DMA_ERR)) { |
| 6228 | /* error when transfering data to/from memory */ |
| 6229 | qc->err_mask |= AC_ERR_HOST_BUS; |
| 6230 | ap->hsm_task_state = HSM_ST_ERR; |
| 6231 | } |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6232 | } |
| 6233 | break; |
| 6234 | case HSM_ST: |
| 6235 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6236 | default: |
| 6237 | goto idle_irq; |
| 6238 | } |
| 6239 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6240 | /* check altstatus */ |
| 6241 | status = ata_altstatus(ap); |
| 6242 | if (status & ATA_BUSY) |
| 6243 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6244 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6245 | /* check main status, clearing INTRQ */ |
| 6246 | status = ata_chk_status(ap); |
| 6247 | if (unlikely(status & ATA_BUSY)) |
| 6248 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6249 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6250 | /* ack bmdma irq events */ |
| 6251 | ap->ops->irq_clear(ap); |
| 6252 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 6253 | ata_hsm_move(ap, qc, status, 0); |
Tejun Heo | ea54763 | 2006-11-17 12:06:21 +0900 | [diff] [blame] | 6254 | |
| 6255 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 6256 | qc->tf.protocol == ATAPI_PROT_DMA)) |
Tejun Heo | ea54763 | 2006-11-17 12:06:21 +0900 | [diff] [blame] | 6257 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); |
| 6258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6259 | return 1; /* irq handled */ |
| 6260 | |
| 6261 | idle_irq: |
| 6262 | ap->stats.idle_irq++; |
| 6263 | |
| 6264 | #ifdef ATA_IRQ_TRAP |
| 6265 | if ((ap->stats.idle_irq % 1000) == 0) { |
Jeff Garzik | 6d32d30 | 2007-08-15 05:38:46 -0400 | [diff] [blame] | 6266 | ata_chk_status(ap); |
| 6267 | ap->ops->irq_clear(ap); |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 6268 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
Alan Cox | 23cfce8 | 2006-03-21 16:06:53 +0000 | [diff] [blame] | 6269 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6270 | } |
| 6271 | #endif |
| 6272 | return 0; /* irq not handled */ |
| 6273 | } |
| 6274 | |
| 6275 | /** |
| 6276 | * ata_interrupt - Default ATA host interrupt handler |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 6277 | * @irq: irq line (unused) |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6278 | * @dev_instance: pointer to our ata_host information structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6279 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 6280 | * Default interrupt handler for PCI IDE devices. Calls |
| 6281 | * ata_host_intr() for each port that is not disabled. |
| 6282 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6283 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6284 | * Obtains host lock during operation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6285 | * |
| 6286 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 6287 | * IRQ_NONE or IRQ_HANDLED. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6288 | */ |
| 6289 | |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 6290 | irqreturn_t ata_interrupt(int irq, void *dev_instance) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6291 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6292 | struct ata_host *host = dev_instance; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6293 | unsigned int i; |
| 6294 | unsigned int handled = 0; |
| 6295 | unsigned long flags; |
| 6296 | |
| 6297 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6298 | spin_lock_irqsave(&host->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6299 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6300 | for (i = 0; i < host->n_ports; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6301 | struct ata_port *ap; |
| 6302 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6303 | ap = host->ports[i]; |
Tejun Heo | c138950 | 2005-08-22 14:59:24 +0900 | [diff] [blame] | 6304 | if (ap && |
Jeff Garzik | 029f546 | 2006-04-02 10:30:40 -0400 | [diff] [blame] | 6305 | !(ap->flags & ATA_FLAG_DISABLED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6306 | struct ata_queued_cmd *qc; |
| 6307 | |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 6308 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 6309 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
Albert Lee | 21b1ed7 | 2005-04-29 17:34:59 +0800 | [diff] [blame] | 6310 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6311 | handled |= ata_host_intr(ap, qc); |
| 6312 | } |
| 6313 | } |
| 6314 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6315 | spin_unlock_irqrestore(&host->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6316 | |
| 6317 | return IRQ_RETVAL(handled); |
| 6318 | } |
| 6319 | |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6320 | /** |
| 6321 | * sata_scr_valid - test whether SCRs are accessible |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6322 | * @link: ATA link to test SCR accessibility for |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6323 | * |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6324 | * Test whether SCRs are accessible for @link. |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6325 | * |
| 6326 | * LOCKING: |
| 6327 | * None. |
| 6328 | * |
| 6329 | * RETURNS: |
| 6330 | * 1 if SCRs are accessible, 0 otherwise. |
| 6331 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6332 | int sata_scr_valid(struct ata_link *link) |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6333 | { |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6334 | struct ata_port *ap = link->ap; |
| 6335 | |
Tejun Heo | a16abc0 | 2007-05-21 18:33:47 +0200 | [diff] [blame] | 6336 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6337 | } |
| 6338 | |
| 6339 | /** |
| 6340 | * sata_scr_read - read SCR register of the specified port |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6341 | * @link: ATA link to read SCR for |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6342 | * @reg: SCR to read |
| 6343 | * @val: Place to store read value |
| 6344 | * |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6345 | * Read SCR register @reg of @link into *@val. This function is |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6346 | * guaranteed to succeed if @link is ap->link, the cable type of |
| 6347 | * the port is SATA and the port implements ->scr_read. |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6348 | * |
| 6349 | * LOCKING: |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6350 | * None if @link is ap->link. Kernel thread context otherwise. |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6351 | * |
| 6352 | * RETURNS: |
| 6353 | * 0 on success, negative errno on failure. |
| 6354 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6355 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6356 | { |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6357 | if (ata_is_host_link(link)) { |
| 6358 | struct ata_port *ap = link->ap; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6359 | |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6360 | if (sata_scr_valid(link)) |
| 6361 | return ap->ops->scr_read(ap, reg, val); |
| 6362 | return -EOPNOTSUPP; |
| 6363 | } |
| 6364 | |
| 6365 | return sata_pmp_scr_read(link, reg, val); |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6366 | } |
| 6367 | |
| 6368 | /** |
| 6369 | * sata_scr_write - write SCR register of the specified port |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6370 | * @link: ATA link to write SCR for |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6371 | * @reg: SCR to write |
| 6372 | * @val: value to write |
| 6373 | * |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6374 | * Write @val to SCR register @reg of @link. This function is |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6375 | * guaranteed to succeed if @link is ap->link, the cable type of |
| 6376 | * the port is SATA and the port implements ->scr_read. |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6377 | * |
| 6378 | * LOCKING: |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6379 | * None if @link is ap->link. Kernel thread context otherwise. |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6380 | * |
| 6381 | * RETURNS: |
| 6382 | * 0 on success, negative errno on failure. |
| 6383 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6384 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6385 | { |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6386 | if (ata_is_host_link(link)) { |
| 6387 | struct ata_port *ap = link->ap; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6388 | |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6389 | if (sata_scr_valid(link)) |
| 6390 | return ap->ops->scr_write(ap, reg, val); |
| 6391 | return -EOPNOTSUPP; |
| 6392 | } |
| 6393 | |
| 6394 | return sata_pmp_scr_write(link, reg, val); |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6395 | } |
| 6396 | |
| 6397 | /** |
| 6398 | * sata_scr_write_flush - write SCR register of the specified port and flush |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6399 | * @link: ATA link to write SCR for |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6400 | * @reg: SCR to write |
| 6401 | * @val: value to write |
| 6402 | * |
| 6403 | * This function is identical to sata_scr_write() except that this |
| 6404 | * function performs flush after writing to the register. |
| 6405 | * |
| 6406 | * LOCKING: |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6407 | * None if @link is ap->link. Kernel thread context otherwise. |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6408 | * |
| 6409 | * RETURNS: |
| 6410 | * 0 on success, negative errno on failure. |
| 6411 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6412 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6413 | { |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6414 | if (ata_is_host_link(link)) { |
| 6415 | struct ata_port *ap = link->ap; |
| 6416 | int rc; |
Tejun Heo | da3dbb1 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 6417 | |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6418 | if (sata_scr_valid(link)) { |
| 6419 | rc = ap->ops->scr_write(ap, reg, val); |
| 6420 | if (rc == 0) |
| 6421 | rc = ap->ops->scr_read(ap, reg, &val); |
| 6422 | return rc; |
| 6423 | } |
| 6424 | return -EOPNOTSUPP; |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6425 | } |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6426 | |
| 6427 | return sata_pmp_scr_write(link, reg, val); |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6428 | } |
| 6429 | |
| 6430 | /** |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6431 | * ata_link_online - test whether the given link is online |
| 6432 | * @link: ATA link to test |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6433 | * |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6434 | * Test whether @link is online. Note that this function returns |
| 6435 | * 0 if online status of @link cannot be obtained, so |
| 6436 | * ata_link_online(link) != !ata_link_offline(link). |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6437 | * |
| 6438 | * LOCKING: |
| 6439 | * None. |
| 6440 | * |
| 6441 | * RETURNS: |
| 6442 | * 1 if the port online status is available and online. |
| 6443 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6444 | int ata_link_online(struct ata_link *link) |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6445 | { |
| 6446 | u32 sstatus; |
| 6447 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6448 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
| 6449 | (sstatus & 0xf) == 0x3) |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6450 | return 1; |
| 6451 | return 0; |
| 6452 | } |
| 6453 | |
| 6454 | /** |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6455 | * ata_link_offline - test whether the given link is offline |
| 6456 | * @link: ATA link to test |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6457 | * |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6458 | * Test whether @link is offline. Note that this function |
| 6459 | * returns 0 if offline status of @link cannot be obtained, so |
| 6460 | * ata_link_online(link) != !ata_link_offline(link). |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6461 | * |
| 6462 | * LOCKING: |
| 6463 | * None. |
| 6464 | * |
| 6465 | * RETURNS: |
| 6466 | * 1 if the port offline status is available and offline. |
| 6467 | */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6468 | int ata_link_offline(struct ata_link *link) |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6469 | { |
| 6470 | u32 sstatus; |
| 6471 | |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6472 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
| 6473 | (sstatus & 0xf) != 0x3) |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6474 | return 1; |
| 6475 | return 0; |
| 6476 | } |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6477 | |
Tejun Heo | 77b08fb | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 6478 | int ata_flush_cache(struct ata_device *dev) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6479 | { |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 6480 | unsigned int err_mask; |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6481 | u8 cmd; |
| 6482 | |
| 6483 | if (!ata_try_flush_cache(dev)) |
| 6484 | return 0; |
| 6485 | |
Tejun Heo | 6fc49ad | 2006-11-11 20:10:45 +0900 | [diff] [blame] | 6486 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6487 | cmd = ATA_CMD_FLUSH_EXT; |
| 6488 | else |
| 6489 | cmd = ATA_CMD_FLUSH; |
| 6490 | |
Alan Cox | 4f34337 | 2007-08-08 14:30:31 +0100 | [diff] [blame] | 6491 | /* This is wrong. On a failed flush we get back the LBA of the lost |
| 6492 | sector and we should (assuming it wasn't aborted as unknown) issue |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 6493 | a further flush command to continue the writeback until it |
Alan Cox | 4f34337 | 2007-08-08 14:30:31 +0100 | [diff] [blame] | 6494 | does not error */ |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 6495 | err_mask = ata_do_simple_cmd(dev, cmd); |
| 6496 | if (err_mask) { |
| 6497 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); |
| 6498 | return -EIO; |
| 6499 | } |
| 6500 | |
| 6501 | return 0; |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6502 | } |
| 6503 | |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6504 | #ifdef CONFIG_PM |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6505 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
| 6506 | unsigned int action, unsigned int ehi_flags, |
| 6507 | int wait) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6508 | { |
| 6509 | unsigned long flags; |
| 6510 | int i, rc; |
| 6511 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6512 | for (i = 0; i < host->n_ports; i++) { |
| 6513 | struct ata_port *ap = host->ports[i]; |
Tejun Heo | e3667eb | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 6514 | struct ata_link *link; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6515 | |
| 6516 | /* Previous resume operation might still be in |
| 6517 | * progress. Wait for PM_PENDING to clear. |
| 6518 | */ |
| 6519 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { |
| 6520 | ata_port_wait_eh(ap); |
| 6521 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); |
| 6522 | } |
| 6523 | |
| 6524 | /* request PM ops to EH */ |
| 6525 | spin_lock_irqsave(ap->lock, flags); |
| 6526 | |
| 6527 | ap->pm_mesg = mesg; |
| 6528 | if (wait) { |
| 6529 | rc = 0; |
| 6530 | ap->pm_result = &rc; |
| 6531 | } |
| 6532 | |
| 6533 | ap->pflags |= ATA_PFLAG_PM_PENDING; |
Tejun Heo | e3667eb | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 6534 | __ata_port_for_each_link(link, ap) { |
| 6535 | link->eh_info.action |= action; |
| 6536 | link->eh_info.flags |= ehi_flags; |
| 6537 | } |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6538 | |
| 6539 | ata_port_schedule_eh(ap); |
| 6540 | |
| 6541 | spin_unlock_irqrestore(ap->lock, flags); |
| 6542 | |
| 6543 | /* wait and check result */ |
| 6544 | if (wait) { |
| 6545 | ata_port_wait_eh(ap); |
| 6546 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); |
| 6547 | if (rc) |
| 6548 | return rc; |
| 6549 | } |
| 6550 | } |
| 6551 | |
| 6552 | return 0; |
| 6553 | } |
| 6554 | |
| 6555 | /** |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6556 | * ata_host_suspend - suspend host |
| 6557 | * @host: host to suspend |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6558 | * @mesg: PM message |
| 6559 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6560 | * Suspend @host. Actual operation is performed by EH. This |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6561 | * function requests EH to perform PM operations and waits for EH |
| 6562 | * to finish. |
| 6563 | * |
| 6564 | * LOCKING: |
| 6565 | * Kernel thread context (may sleep). |
| 6566 | * |
| 6567 | * RETURNS: |
| 6568 | * 0 on success, -errno on failure. |
| 6569 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6570 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6571 | { |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 6572 | int rc; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6573 | |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 6574 | /* |
| 6575 | * disable link pm on all ports before requesting |
| 6576 | * any pm activity |
| 6577 | */ |
| 6578 | ata_lpm_enable(host); |
| 6579 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6580 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
Jeff Garzik | 72ad6ec | 2008-02-25 17:31:10 -0500 | [diff] [blame] | 6581 | if (rc == 0) |
| 6582 | host->dev->power.power_state = mesg; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6583 | return rc; |
| 6584 | } |
| 6585 | |
| 6586 | /** |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6587 | * ata_host_resume - resume host |
| 6588 | * @host: host to resume |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6589 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6590 | * Resume @host. Actual operation is performed by EH. This |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6591 | * function requests EH to perform PM operations and returns. |
| 6592 | * Note that all resume operations are performed parallely. |
| 6593 | * |
| 6594 | * LOCKING: |
| 6595 | * Kernel thread context (may sleep). |
| 6596 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6597 | void ata_host_resume(struct ata_host *host) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6598 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6599 | ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, |
| 6600 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); |
Jeff Garzik | 72ad6ec | 2008-02-25 17:31:10 -0500 | [diff] [blame] | 6601 | host->dev->power.power_state = PMSG_ON; |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 6602 | |
| 6603 | /* reenable link pm */ |
| 6604 | ata_lpm_disable(host); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6605 | } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6606 | #endif |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6607 | |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 6608 | /** |
| 6609 | * ata_port_start - Set port up for dma. |
| 6610 | * @ap: Port to initialize |
| 6611 | * |
| 6612 | * Called just after data structures for each port are |
| 6613 | * initialized. Allocates space for PRD table. |
| 6614 | * |
| 6615 | * May be used as the port_start() entry in ata_port_operations. |
| 6616 | * |
| 6617 | * LOCKING: |
| 6618 | * Inherited from caller. |
| 6619 | */ |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6620 | int ata_port_start(struct ata_port *ap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6621 | { |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 6622 | struct device *dev = ap->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6623 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6624 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
| 6625 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6626 | if (!ap->prd) |
| 6627 | return -ENOMEM; |
| 6628 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6629 | return 0; |
| 6630 | } |
| 6631 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6632 | /** |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 6633 | * ata_dev_init - Initialize an ata_device structure |
| 6634 | * @dev: Device structure to initialize |
| 6635 | * |
| 6636 | * Initialize @dev in preparation for probing. |
| 6637 | * |
| 6638 | * LOCKING: |
| 6639 | * Inherited from caller. |
| 6640 | */ |
| 6641 | void ata_dev_init(struct ata_device *dev) |
| 6642 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 6643 | struct ata_link *link = dev->link; |
| 6644 | struct ata_port *ap = link->ap; |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6645 | unsigned long flags; |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 6646 | |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 6647 | /* SATA spd limit is bound to the first device */ |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 6648 | link->sata_spd_limit = link->hw_sata_spd_limit; |
| 6649 | link->sata_spd = 0; |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 6650 | |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6651 | /* High bits of dev->flags are used to record warm plug |
| 6652 | * requests which occur asynchronously. Synchronize using |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6653 | * host lock. |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6654 | */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6655 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6656 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
Tejun Heo | 3dcc323 | 2007-09-03 12:20:11 +0900 | [diff] [blame] | 6657 | dev->horkage = 0; |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6658 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6659 | |
| 6660 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
| 6661 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 6662 | dev->pio_mask = UINT_MAX; |
| 6663 | dev->mwdma_mask = UINT_MAX; |
| 6664 | dev->udma_mask = UINT_MAX; |
| 6665 | } |
| 6666 | |
| 6667 | /** |
Tejun Heo | 4fb37a2 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6668 | * ata_link_init - Initialize an ata_link structure |
| 6669 | * @ap: ATA port link is attached to |
| 6670 | * @link: Link structure to initialize |
Tejun Heo | 8989805 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6671 | * @pmp: Port multiplier port number |
Tejun Heo | 4fb37a2 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6672 | * |
| 6673 | * Initialize @link. |
| 6674 | * |
| 6675 | * LOCKING: |
| 6676 | * Kernel thread context (may sleep) |
| 6677 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 6678 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
Tejun Heo | 4fb37a2 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6679 | { |
| 6680 | int i; |
| 6681 | |
| 6682 | /* clear everything except for devices */ |
| 6683 | memset(link, 0, offsetof(struct ata_link, device[0])); |
| 6684 | |
| 6685 | link->ap = ap; |
Tejun Heo | 8989805 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6686 | link->pmp = pmp; |
Tejun Heo | 4fb37a2 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6687 | link->active_tag = ATA_TAG_POISON; |
| 6688 | link->hw_sata_spd_limit = UINT_MAX; |
| 6689 | |
| 6690 | /* can't use iterator, ap isn't initialized yet */ |
| 6691 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 6692 | struct ata_device *dev = &link->device[i]; |
| 6693 | |
| 6694 | dev->link = link; |
| 6695 | dev->devno = dev - link->device; |
| 6696 | ata_dev_init(dev); |
| 6697 | } |
| 6698 | } |
| 6699 | |
| 6700 | /** |
| 6701 | * sata_link_init_spd - Initialize link->sata_spd_limit |
| 6702 | * @link: Link to configure sata_spd_limit for |
| 6703 | * |
| 6704 | * Initialize @link->[hw_]sata_spd_limit to the currently |
| 6705 | * configured value. |
| 6706 | * |
| 6707 | * LOCKING: |
| 6708 | * Kernel thread context (may sleep). |
| 6709 | * |
| 6710 | * RETURNS: |
| 6711 | * 0 on success, -errno on failure. |
| 6712 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 6713 | int sata_link_init_spd(struct ata_link *link) |
Tejun Heo | 4fb37a2 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6714 | { |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 6715 | u32 scontrol; |
| 6716 | u8 spd; |
Tejun Heo | 4fb37a2 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6717 | int rc; |
| 6718 | |
| 6719 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); |
| 6720 | if (rc) |
| 6721 | return rc; |
| 6722 | |
| 6723 | spd = (scontrol >> 4) & 0xf; |
| 6724 | if (spd) |
| 6725 | link->hw_sata_spd_limit &= (1 << spd) - 1; |
| 6726 | |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 6727 | ata_force_spd_limit(link); |
| 6728 | |
Tejun Heo | 4fb37a2 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6729 | link->sata_spd_limit = link->hw_sata_spd_limit; |
| 6730 | |
| 6731 | return 0; |
| 6732 | } |
| 6733 | |
| 6734 | /** |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6735 | * ata_port_alloc - allocate and initialize basic ATA port resources |
| 6736 | * @host: ATA host this allocated port belongs to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6737 | * |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6738 | * Allocate and initialize basic ATA port resources. |
| 6739 | * |
| 6740 | * RETURNS: |
| 6741 | * Allocate ATA port on success, NULL on failure. |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 6742 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6743 | * LOCKING: |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6744 | * Inherited from calling layer (may sleep). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6745 | */ |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6746 | struct ata_port *ata_port_alloc(struct ata_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6747 | { |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6748 | struct ata_port *ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6749 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6750 | DPRINTK("ENTER\n"); |
| 6751 | |
| 6752 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); |
| 6753 | if (!ap) |
| 6754 | return NULL; |
| 6755 | |
Tejun Heo | f4d6d00 | 2007-05-01 11:50:15 +0200 | [diff] [blame] | 6756 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6757 | ap->lock = &host->lock; |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 6758 | ap->flags = ATA_FLAG_DISABLED; |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6759 | ap->print_id = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6760 | ap->ctl = ATA_DEVCTL_OBS; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6761 | ap->host = host; |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6762 | ap->dev = host->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6763 | ap->last_ctl = 0xFF; |
Borislav Petkov | bd5d825 | 2006-06-11 23:17:01 -0400 | [diff] [blame] | 6764 | |
| 6765 | #if defined(ATA_VERBOSE_DEBUG) |
| 6766 | /* turn on all debugging levels */ |
| 6767 | ap->msg_enable = 0x00FF; |
| 6768 | #elif defined(ATA_DEBUG) |
| 6769 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 6770 | #else |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 6771 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
Borislav Petkov | bd5d825 | 2006-06-11 23:17:01 -0400 | [diff] [blame] | 6772 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6773 | |
Jeff Garzik | 442eacc | 2007-12-19 04:25:10 -0500 | [diff] [blame] | 6774 | INIT_DELAYED_WORK(&ap->port_task, ata_pio_task); |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 6775 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
| 6776 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); |
Tejun Heo | a72ec4c | 2006-01-23 13:09:37 +0900 | [diff] [blame] | 6777 | INIT_LIST_HEAD(&ap->eh_done_q); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 6778 | init_waitqueue_head(&ap->eh_wait_q); |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 6779 | init_timer_deferrable(&ap->fastdrain_timer); |
| 6780 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; |
| 6781 | ap->fastdrain_timer.data = (unsigned long)ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6782 | |
Tejun Heo | 838df62 | 2006-05-15 20:57:44 +0900 | [diff] [blame] | 6783 | ap->cbl = ATA_CBL_NONE; |
Tejun Heo | 838df62 | 2006-05-15 20:57:44 +0900 | [diff] [blame] | 6784 | |
Tejun Heo | 8989805 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6785 | ata_link_init(ap, &ap->link, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6786 | |
| 6787 | #ifdef ATA_IRQ_TRAP |
| 6788 | ap->stats.unhandled_irq = 1; |
| 6789 | ap->stats.idle_irq = 1; |
| 6790 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6791 | return ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6792 | } |
| 6793 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6794 | static void ata_host_release(struct device *gendev, void *res) |
| 6795 | { |
| 6796 | struct ata_host *host = dev_get_drvdata(gendev); |
| 6797 | int i; |
| 6798 | |
| 6799 | for (i = 0; i < host->n_ports; i++) { |
| 6800 | struct ata_port *ap = host->ports[i]; |
| 6801 | |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6802 | if (!ap) |
| 6803 | continue; |
| 6804 | |
Tejun Heo | 4911487 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6805 | if (ap->scsi_host) |
Tejun Heo | 1aa506e | 2007-03-09 19:36:12 +0900 | [diff] [blame] | 6806 | scsi_host_put(ap->scsi_host); |
| 6807 | |
Tejun Heo | 633273a3 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 6808 | kfree(ap->pmp_link); |
Tejun Heo | 4911487 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6809 | kfree(ap); |
Tejun Heo | 1aa506e | 2007-03-09 19:36:12 +0900 | [diff] [blame] | 6810 | host->ports[i] = NULL; |
| 6811 | } |
| 6812 | |
Tejun Heo | 1aa56cc | 2007-02-27 22:33:21 +0900 | [diff] [blame] | 6813 | dev_set_drvdata(gendev, NULL); |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6814 | } |
| 6815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6816 | /** |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6817 | * ata_host_alloc - allocate and init basic ATA host resources |
| 6818 | * @dev: generic device this host is associated with |
| 6819 | * @max_ports: maximum number of ATA ports associated with this host |
| 6820 | * |
| 6821 | * Allocate and initialize basic ATA host resources. LLD calls |
| 6822 | * this function to allocate a host, initializes it fully and |
| 6823 | * attaches it using ata_host_register(). |
| 6824 | * |
| 6825 | * @max_ports ports are allocated and host->n_ports is |
| 6826 | * initialized to @max_ports. The caller is allowed to decrease |
| 6827 | * host->n_ports before calling ata_host_register(). The unused |
| 6828 | * ports will be automatically freed on registration. |
| 6829 | * |
| 6830 | * RETURNS: |
| 6831 | * Allocate ATA host on success, NULL on failure. |
| 6832 | * |
| 6833 | * LOCKING: |
| 6834 | * Inherited from calling layer (may sleep). |
| 6835 | */ |
| 6836 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) |
| 6837 | { |
| 6838 | struct ata_host *host; |
| 6839 | size_t sz; |
| 6840 | int i; |
| 6841 | |
| 6842 | DPRINTK("ENTER\n"); |
| 6843 | |
| 6844 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
| 6845 | return NULL; |
| 6846 | |
| 6847 | /* alloc a container for our list of ATA ports (buses) */ |
| 6848 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); |
| 6849 | /* alloc a container for our list of ATA ports (buses) */ |
| 6850 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); |
| 6851 | if (!host) |
| 6852 | goto err_out; |
| 6853 | |
| 6854 | devres_add(dev, host); |
| 6855 | dev_set_drvdata(dev, host); |
| 6856 | |
| 6857 | spin_lock_init(&host->lock); |
| 6858 | host->dev = dev; |
| 6859 | host->n_ports = max_ports; |
| 6860 | |
| 6861 | /* allocate ports bound to this host */ |
| 6862 | for (i = 0; i < max_ports; i++) { |
| 6863 | struct ata_port *ap; |
| 6864 | |
| 6865 | ap = ata_port_alloc(host); |
| 6866 | if (!ap) |
| 6867 | goto err_out; |
| 6868 | |
| 6869 | ap->port_no = i; |
| 6870 | host->ports[i] = ap; |
| 6871 | } |
| 6872 | |
| 6873 | devres_remove_group(dev, NULL); |
| 6874 | return host; |
| 6875 | |
| 6876 | err_out: |
| 6877 | devres_release_group(dev, NULL); |
| 6878 | return NULL; |
| 6879 | } |
| 6880 | |
| 6881 | /** |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6882 | * ata_host_alloc_pinfo - alloc host and init with port_info array |
| 6883 | * @dev: generic device this host is associated with |
| 6884 | * @ppi: array of ATA port_info to initialize host with |
| 6885 | * @n_ports: number of ATA ports attached to this host |
| 6886 | * |
| 6887 | * Allocate ATA host and initialize with info from @ppi. If NULL |
| 6888 | * terminated, @ppi may contain fewer entries than @n_ports. The |
| 6889 | * last entry will be used for the remaining ports. |
| 6890 | * |
| 6891 | * RETURNS: |
| 6892 | * Allocate ATA host on success, NULL on failure. |
| 6893 | * |
| 6894 | * LOCKING: |
| 6895 | * Inherited from calling layer (may sleep). |
| 6896 | */ |
| 6897 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, |
| 6898 | const struct ata_port_info * const * ppi, |
| 6899 | int n_ports) |
| 6900 | { |
| 6901 | const struct ata_port_info *pi; |
| 6902 | struct ata_host *host; |
| 6903 | int i, j; |
| 6904 | |
| 6905 | host = ata_host_alloc(dev, n_ports); |
| 6906 | if (!host) |
| 6907 | return NULL; |
| 6908 | |
| 6909 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { |
| 6910 | struct ata_port *ap = host->ports[i]; |
| 6911 | |
| 6912 | if (ppi[j]) |
| 6913 | pi = ppi[j++]; |
| 6914 | |
| 6915 | ap->pio_mask = pi->pio_mask; |
| 6916 | ap->mwdma_mask = pi->mwdma_mask; |
| 6917 | ap->udma_mask = pi->udma_mask; |
| 6918 | ap->flags |= pi->flags; |
Tejun Heo | 0c88758 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 6919 | ap->link.flags |= pi->link_flags; |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6920 | ap->ops = pi->port_ops; |
| 6921 | |
| 6922 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) |
| 6923 | host->ops = pi->port_ops; |
| 6924 | if (!host->private_data && pi->private_data) |
| 6925 | host->private_data = pi->private_data; |
| 6926 | } |
| 6927 | |
| 6928 | return host; |
| 6929 | } |
| 6930 | |
Tejun Heo | 32ebbc0 | 2007-11-08 13:09:00 +0900 | [diff] [blame] | 6931 | static void ata_host_stop(struct device *gendev, void *res) |
| 6932 | { |
| 6933 | struct ata_host *host = dev_get_drvdata(gendev); |
| 6934 | int i; |
| 6935 | |
| 6936 | WARN_ON(!(host->flags & ATA_HOST_STARTED)); |
| 6937 | |
| 6938 | for (i = 0; i < host->n_ports; i++) { |
| 6939 | struct ata_port *ap = host->ports[i]; |
| 6940 | |
| 6941 | if (ap->ops->port_stop) |
| 6942 | ap->ops->port_stop(ap); |
| 6943 | } |
| 6944 | |
| 6945 | if (host->ops->host_stop) |
| 6946 | host->ops->host_stop(host); |
| 6947 | } |
| 6948 | |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6949 | /** |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6950 | * ata_host_start - start and freeze ports of an ATA host |
| 6951 | * @host: ATA host to start ports for |
| 6952 | * |
| 6953 | * Start and then freeze ports of @host. Started status is |
| 6954 | * recorded in host->flags, so this function can be called |
| 6955 | * multiple times. Ports are guaranteed to get started only |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6956 | * once. If host->ops isn't initialized yet, its set to the |
| 6957 | * first non-dummy port ops. |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6958 | * |
| 6959 | * LOCKING: |
| 6960 | * Inherited from calling layer (may sleep). |
| 6961 | * |
| 6962 | * RETURNS: |
| 6963 | * 0 if all ports are started successfully, -errno otherwise. |
| 6964 | */ |
| 6965 | int ata_host_start(struct ata_host *host) |
| 6966 | { |
Tejun Heo | 32ebbc0 | 2007-11-08 13:09:00 +0900 | [diff] [blame] | 6967 | int have_stop = 0; |
| 6968 | void *start_dr = NULL; |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6969 | int i, rc; |
| 6970 | |
| 6971 | if (host->flags & ATA_HOST_STARTED) |
| 6972 | return 0; |
| 6973 | |
| 6974 | for (i = 0; i < host->n_ports; i++) { |
| 6975 | struct ata_port *ap = host->ports[i]; |
| 6976 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6977 | if (!host->ops && !ata_port_is_dummy(ap)) |
| 6978 | host->ops = ap->ops; |
| 6979 | |
Tejun Heo | 32ebbc0 | 2007-11-08 13:09:00 +0900 | [diff] [blame] | 6980 | if (ap->ops->port_stop) |
| 6981 | have_stop = 1; |
| 6982 | } |
| 6983 | |
| 6984 | if (host->ops->host_stop) |
| 6985 | have_stop = 1; |
| 6986 | |
| 6987 | if (have_stop) { |
| 6988 | start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); |
| 6989 | if (!start_dr) |
| 6990 | return -ENOMEM; |
| 6991 | } |
| 6992 | |
| 6993 | for (i = 0; i < host->n_ports; i++) { |
| 6994 | struct ata_port *ap = host->ports[i]; |
| 6995 | |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6996 | if (ap->ops->port_start) { |
| 6997 | rc = ap->ops->port_start(ap); |
| 6998 | if (rc) { |
Alan Cox | 0f9fe9b | 2007-11-30 15:23:16 +0000 | [diff] [blame] | 6999 | if (rc != -ENODEV) |
Andrew Morton | 0f75774 | 2008-01-10 14:33:09 -0800 | [diff] [blame] | 7000 | dev_printk(KERN_ERR, host->dev, |
| 7001 | "failed to start port %d " |
| 7002 | "(errno=%d)\n", i, rc); |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 7003 | goto err_out; |
| 7004 | } |
| 7005 | } |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 7006 | ata_eh_freeze_port(ap); |
| 7007 | } |
| 7008 | |
Tejun Heo | 32ebbc0 | 2007-11-08 13:09:00 +0900 | [diff] [blame] | 7009 | if (start_dr) |
| 7010 | devres_add(host->dev, start_dr); |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 7011 | host->flags |= ATA_HOST_STARTED; |
| 7012 | return 0; |
| 7013 | |
| 7014 | err_out: |
| 7015 | while (--i >= 0) { |
| 7016 | struct ata_port *ap = host->ports[i]; |
| 7017 | |
| 7018 | if (ap->ops->port_stop) |
| 7019 | ap->ops->port_stop(ap); |
| 7020 | } |
Tejun Heo | 32ebbc0 | 2007-11-08 13:09:00 +0900 | [diff] [blame] | 7021 | devres_free(start_dr); |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 7022 | return rc; |
| 7023 | } |
| 7024 | |
| 7025 | /** |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7026 | * ata_sas_host_init - Initialize a host struct |
| 7027 | * @host: host to initialize |
| 7028 | * @dev: device host is attached to |
| 7029 | * @flags: host flags |
| 7030 | * @ops: port_ops |
Brian King | b03732f | 2006-08-07 14:27:10 -0500 | [diff] [blame] | 7031 | * |
| 7032 | * LOCKING: |
| 7033 | * PCI/etc. bus probe sem. |
| 7034 | * |
| 7035 | */ |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7036 | /* KILLME - the only user left is ipr */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7037 | void ata_host_init(struct ata_host *host, struct device *dev, |
| 7038 | unsigned long flags, const struct ata_port_operations *ops) |
Brian King | b03732f | 2006-08-07 14:27:10 -0500 | [diff] [blame] | 7039 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7040 | spin_lock_init(&host->lock); |
| 7041 | host->dev = dev; |
| 7042 | host->flags = flags; |
| 7043 | host->ops = ops; |
Brian King | b03732f | 2006-08-07 14:27:10 -0500 | [diff] [blame] | 7044 | } |
| 7045 | |
| 7046 | /** |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7047 | * ata_host_register - register initialized ATA host |
| 7048 | * @host: ATA host to register |
| 7049 | * @sht: template for SCSI host |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 7050 | * |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7051 | * Register initialized ATA host. @host is allocated using |
| 7052 | * ata_host_alloc() and fully initialized by LLD. This function |
| 7053 | * starts ports, registers @host with ATA and SCSI layers and |
| 7054 | * probe registered devices. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7055 | * |
| 7056 | * LOCKING: |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7057 | * Inherited from calling layer (may sleep). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7058 | * |
| 7059 | * RETURNS: |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7060 | * 0 on success, -errno otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7061 | */ |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7062 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7063 | { |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7064 | int i, rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7065 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7066 | /* host must have been started */ |
| 7067 | if (!(host->flags & ATA_HOST_STARTED)) { |
| 7068 | dev_printk(KERN_ERR, host->dev, |
| 7069 | "BUG: trying to register unstarted host\n"); |
| 7070 | WARN_ON(1); |
| 7071 | return -EINVAL; |
Alan Cox | 02f076a | 2006-09-26 17:35:32 +0100 | [diff] [blame] | 7072 | } |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 7073 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7074 | /* Blow away unused ports. This happens when LLD can't |
| 7075 | * determine the exact number of ports to allocate at |
| 7076 | * allocation time. |
| 7077 | */ |
| 7078 | for (i = host->n_ports; host->ports[i]; i++) |
| 7079 | kfree(host->ports[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7080 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7081 | /* give ports names and add SCSI hosts */ |
| 7082 | for (i = 0; i < host->n_ports; i++) |
| 7083 | host->ports[i]->print_id = ata_print_id++; |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 7084 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7085 | rc = ata_scsi_add_hosts(host, sht); |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 7086 | if (rc) |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7087 | return rc; |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 7088 | |
Tejun Heo | fafbae8 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 7089 | /* associate with ACPI nodes */ |
| 7090 | ata_acpi_associate(host); |
| 7091 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7092 | /* set cable, sata_spd_limit and report */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7093 | for (i = 0; i < host->n_ports; i++) { |
| 7094 | struct ata_port *ap = host->ports[i]; |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7095 | unsigned long xfer_mask; |
| 7096 | |
| 7097 | /* set SATA cable type if still unset */ |
| 7098 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) |
| 7099 | ap->cbl = ATA_CBL_SATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7100 | |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 7101 | /* init sata_spd_limit to the current value */ |
Tejun Heo | 4fb37a2 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 7102 | sata_link_init_spd(&ap->link); |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 7103 | |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 7104 | /* print per-port info to dmesg */ |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7105 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
| 7106 | ap->udma_mask); |
| 7107 | |
Tejun Heo | abf6e8e | 2007-10-09 14:57:25 +0900 | [diff] [blame] | 7108 | if (!ata_port_is_dummy(ap)) { |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 7109 | ata_port_printk(ap, KERN_INFO, |
| 7110 | "%cATA max %s %s\n", |
Tejun Heo | a16abc0 | 2007-05-21 18:33:47 +0200 | [diff] [blame] | 7111 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7112 | ata_mode_string(xfer_mask), |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 7113 | ap->link.eh_info.desc); |
Tejun Heo | abf6e8e | 2007-10-09 14:57:25 +0900 | [diff] [blame] | 7114 | ata_ehi_clear_desc(&ap->link.eh_info); |
| 7115 | } else |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7116 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
| 7117 | } |
| 7118 | |
| 7119 | /* perform each probe synchronously */ |
| 7120 | DPRINTK("probe begin\n"); |
| 7121 | for (i = 0; i < host->n_ports; i++) { |
| 7122 | struct ata_port *ap = host->ports[i]; |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7123 | |
| 7124 | /* probe */ |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 7125 | if (ap->ops->error_handler) { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 7126 | struct ata_eh_info *ehi = &ap->link.eh_info; |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 7127 | unsigned long flags; |
| 7128 | |
| 7129 | ata_port_probe(ap); |
| 7130 | |
| 7131 | /* kick EH for boot probing */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 7132 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 7133 | |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 7134 | ehi->probe_mask = |
| 7135 | (1 << ata_link_max_devices(&ap->link)) - 1; |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 7136 | ehi->action |= ATA_EH_SOFTRESET; |
| 7137 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 7138 | |
Tejun Heo | f4d6d00 | 2007-05-01 11:50:15 +0200 | [diff] [blame] | 7139 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 7140 | ap->pflags |= ATA_PFLAG_LOADING; |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 7141 | ata_port_schedule_eh(ap); |
| 7142 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 7143 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 7144 | |
| 7145 | /* wait for EH to finish */ |
| 7146 | ata_port_wait_eh(ap); |
| 7147 | } else { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 7148 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 7149 | rc = ata_bus_probe(ap); |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 7150 | DPRINTK("ata%u: bus probe end\n", ap->print_id); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 7151 | |
| 7152 | if (rc) { |
| 7153 | /* FIXME: do something useful here? |
| 7154 | * Current libata behavior will |
| 7155 | * tear down everything when |
| 7156 | * the module is removed |
| 7157 | * or the h/w is unplugged. |
| 7158 | */ |
| 7159 | } |
| 7160 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7161 | } |
| 7162 | |
| 7163 | /* probes are done, now scan each port's disk(s) */ |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 7164 | DPRINTK("host probe begin\n"); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7165 | for (i = 0; i < host->n_ports; i++) { |
| 7166 | struct ata_port *ap = host->ports[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7167 | |
Tejun Heo | 1ae4631 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 7168 | ata_scsi_scan_host(ap, 1); |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 7169 | ata_lpm_schedule(ap, ap->pm_policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7170 | } |
| 7171 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7172 | return 0; |
| 7173 | } |
| 7174 | |
| 7175 | /** |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7176 | * ata_host_activate - start host, request IRQ and register it |
| 7177 | * @host: target ATA host |
| 7178 | * @irq: IRQ to request |
| 7179 | * @irq_handler: irq_handler used when requesting IRQ |
| 7180 | * @irq_flags: irq_flags used when requesting IRQ |
| 7181 | * @sht: scsi_host_template to use when registering the host |
| 7182 | * |
| 7183 | * After allocating an ATA host and initializing it, most libata |
| 7184 | * LLDs perform three steps to activate the host - start host, |
| 7185 | * request IRQ and register it. This helper takes necessasry |
| 7186 | * arguments and performs the three steps in one go. |
| 7187 | * |
Paul Mundt | 3d46b2e | 2007-11-08 11:14:56 +0900 | [diff] [blame] | 7188 | * An invalid IRQ skips the IRQ registration and expects the host to |
| 7189 | * have set polling mode on the port. In this case, @irq_handler |
| 7190 | * should be NULL. |
| 7191 | * |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7192 | * LOCKING: |
| 7193 | * Inherited from calling layer (may sleep). |
| 7194 | * |
| 7195 | * RETURNS: |
| 7196 | * 0 on success, -errno otherwise. |
| 7197 | */ |
| 7198 | int ata_host_activate(struct ata_host *host, int irq, |
| 7199 | irq_handler_t irq_handler, unsigned long irq_flags, |
| 7200 | struct scsi_host_template *sht) |
| 7201 | { |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 7202 | int i, rc; |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7203 | |
| 7204 | rc = ata_host_start(host); |
| 7205 | if (rc) |
| 7206 | return rc; |
| 7207 | |
Paul Mundt | 3d46b2e | 2007-11-08 11:14:56 +0900 | [diff] [blame] | 7208 | /* Special case for polling mode */ |
| 7209 | if (!irq) { |
| 7210 | WARN_ON(irq_handler); |
| 7211 | return ata_host_register(host, sht); |
| 7212 | } |
| 7213 | |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7214 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
| 7215 | dev_driver_string(host->dev), host); |
| 7216 | if (rc) |
| 7217 | return rc; |
| 7218 | |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 7219 | for (i = 0; i < host->n_ports; i++) |
| 7220 | ata_port_desc(host->ports[i], "irq %d", irq); |
Tejun Heo | 4031826 | 2007-07-03 01:38:47 +0900 | [diff] [blame] | 7221 | |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7222 | rc = ata_host_register(host, sht); |
| 7223 | /* if failed, just free the IRQ and leave ports alone */ |
| 7224 | if (rc) |
| 7225 | devm_free_irq(host->dev, irq, host); |
| 7226 | |
| 7227 | return rc; |
| 7228 | } |
| 7229 | |
| 7230 | /** |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7231 | * ata_port_detach - Detach ATA port in prepration of device removal |
| 7232 | * @ap: ATA port to be detached |
| 7233 | * |
| 7234 | * Detach all ATA devices and the associated SCSI devices of @ap; |
| 7235 | * then, remove the associated SCSI host. @ap is guaranteed to |
| 7236 | * be quiescent on return from this function. |
| 7237 | * |
| 7238 | * LOCKING: |
| 7239 | * Kernel thread context (may sleep). |
| 7240 | */ |
Adrian Bunk | 741b776 | 2007-10-24 18:23:06 +0200 | [diff] [blame] | 7241 | static void ata_port_detach(struct ata_port *ap) |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7242 | { |
| 7243 | unsigned long flags; |
Tejun Heo | 41bda9c | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 7244 | struct ata_link *link; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 7245 | struct ata_device *dev; |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7246 | |
| 7247 | if (!ap->ops->error_handler) |
Tejun Heo | c3cf30a | 2006-08-05 03:59:11 +0900 | [diff] [blame] | 7248 | goto skip_eh; |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7249 | |
| 7250 | /* tell EH we're leaving & flush EH */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 7251 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 7252 | ap->pflags |= ATA_PFLAG_UNLOADING; |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 7253 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7254 | |
| 7255 | ata_port_wait_eh(ap); |
| 7256 | |
Tejun Heo | 7f9ad9b | 2007-12-15 15:05:00 +0900 | [diff] [blame] | 7257 | /* EH is now guaranteed to see UNLOADING - EH context belongs |
| 7258 | * to us. Disable all existing devices. |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7259 | */ |
Tejun Heo | 41bda9c | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 7260 | ata_port_for_each_link(link, ap) { |
| 7261 | ata_link_for_each_dev(dev, link) |
| 7262 | ata_dev_disable(dev); |
| 7263 | } |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7264 | |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7265 | /* Final freeze & EH. All in-flight commands are aborted. EH |
| 7266 | * will be skipped and retrials will be terminated with bad |
| 7267 | * target. |
| 7268 | */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 7269 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7270 | ata_port_freeze(ap); /* won't be thawed */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 7271 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7272 | |
| 7273 | ata_port_wait_eh(ap); |
Oleg Nesterov | 45a66c1 | 2007-07-09 11:46:13 -0700 | [diff] [blame] | 7274 | cancel_rearming_delayed_work(&ap->hotplug_task); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7275 | |
Tejun Heo | c3cf30a | 2006-08-05 03:59:11 +0900 | [diff] [blame] | 7276 | skip_eh: |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7277 | /* remove the associated SCSI host */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7278 | scsi_remove_host(ap->scsi_host); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 7279 | } |
| 7280 | |
| 7281 | /** |
Tejun Heo | 0529c15 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 7282 | * ata_host_detach - Detach all ports of an ATA host |
| 7283 | * @host: Host to detach |
| 7284 | * |
| 7285 | * Detach all ports of @host. |
| 7286 | * |
| 7287 | * LOCKING: |
| 7288 | * Kernel thread context (may sleep). |
| 7289 | */ |
| 7290 | void ata_host_detach(struct ata_host *host) |
| 7291 | { |
| 7292 | int i; |
| 7293 | |
| 7294 | for (i = 0; i < host->n_ports; i++) |
| 7295 | ata_port_detach(host->ports[i]); |
Tejun Heo | 562f0c2 | 2007-12-15 15:05:01 +0900 | [diff] [blame] | 7296 | |
| 7297 | /* the host is dead now, dissociate ACPI */ |
| 7298 | ata_acpi_dissociate(host); |
Tejun Heo | 0529c15 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 7299 | } |
| 7300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7301 | /** |
| 7302 | * ata_std_ports - initialize ioaddr with standard port offsets. |
| 7303 | * @ioaddr: IO address structure to be initialized |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 7304 | * |
| 7305 | * Utility function which initializes data_addr, error_addr, |
| 7306 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, |
| 7307 | * device_addr, status_addr, and command_addr to standard offsets |
| 7308 | * relative to cmd_addr. |
| 7309 | * |
| 7310 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7311 | */ |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 7312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7313 | void ata_std_ports(struct ata_ioports *ioaddr) |
| 7314 | { |
| 7315 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; |
| 7316 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; |
| 7317 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; |
| 7318 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; |
| 7319 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; |
| 7320 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; |
| 7321 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; |
| 7322 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; |
| 7323 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; |
| 7324 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; |
| 7325 | } |
| 7326 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 7327 | |
Jeff Garzik | 374b187 | 2005-08-30 05:42:52 -0400 | [diff] [blame] | 7328 | #ifdef CONFIG_PCI |
| 7329 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 7330 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7331 | * ata_pci_remove_one - PCI layer callback for device removal |
| 7332 | * @pdev: PCI device that was removed |
| 7333 | * |
Tejun Heo | b878ca5 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 7334 | * PCI layer indicates to libata via this hook that hot-unplug or |
| 7335 | * module unload event has occurred. Detach all ports. Resource |
| 7336 | * release is handled via devres. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7337 | * |
| 7338 | * LOCKING: |
| 7339 | * Inherited from PCI layer (may sleep). |
| 7340 | */ |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 7341 | void ata_pci_remove_one(struct pci_dev *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7342 | { |
Jeff Garzik | 2855568 | 2007-10-11 17:12:35 -0400 | [diff] [blame] | 7343 | struct device *dev = &pdev->dev; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7344 | struct ata_host *host = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7345 | |
Tejun Heo | b878ca5 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 7346 | ata_host_detach(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7347 | } |
| 7348 | |
| 7349 | /* move to PCI subsystem */ |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 7350 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7351 | { |
| 7352 | unsigned long tmp = 0; |
| 7353 | |
| 7354 | switch (bits->width) { |
| 7355 | case 1: { |
| 7356 | u8 tmp8 = 0; |
| 7357 | pci_read_config_byte(pdev, bits->reg, &tmp8); |
| 7358 | tmp = tmp8; |
| 7359 | break; |
| 7360 | } |
| 7361 | case 2: { |
| 7362 | u16 tmp16 = 0; |
| 7363 | pci_read_config_word(pdev, bits->reg, &tmp16); |
| 7364 | tmp = tmp16; |
| 7365 | break; |
| 7366 | } |
| 7367 | case 4: { |
| 7368 | u32 tmp32 = 0; |
| 7369 | pci_read_config_dword(pdev, bits->reg, &tmp32); |
| 7370 | tmp = tmp32; |
| 7371 | break; |
| 7372 | } |
| 7373 | |
| 7374 | default: |
| 7375 | return -EINVAL; |
| 7376 | } |
| 7377 | |
| 7378 | tmp &= bits->mask; |
| 7379 | |
| 7380 | return (tmp == bits->val) ? 1 : 0; |
| 7381 | } |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 7382 | |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 7383 | #ifdef CONFIG_PM |
Tejun Heo | 3c5100c | 2006-07-26 16:58:33 +0900 | [diff] [blame] | 7384 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 7385 | { |
| 7386 | pci_save_state(pdev); |
Tejun Heo | 4c90d97 | 2007-02-20 18:14:48 +0900 | [diff] [blame] | 7387 | pci_disable_device(pdev); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 7388 | |
Rafael J. Wysocki | 3a2d5b7 | 2008-02-23 19:13:25 +0100 | [diff] [blame] | 7389 | if (mesg.event & PM_EVENT_SLEEP) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 7390 | pci_set_power_state(pdev, PCI_D3hot); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 7391 | } |
| 7392 | |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 7393 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 7394 | { |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 7395 | int rc; |
| 7396 | |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 7397 | pci_set_power_state(pdev, PCI_D0); |
| 7398 | pci_restore_state(pdev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 7399 | |
Tejun Heo | b878ca5 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 7400 | rc = pcim_enable_device(pdev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 7401 | if (rc) { |
| 7402 | dev_printk(KERN_ERR, &pdev->dev, |
| 7403 | "failed to enable device after resume (%d)\n", rc); |
| 7404 | return rc; |
| 7405 | } |
| 7406 | |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 7407 | pci_set_master(pdev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 7408 | return 0; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 7409 | } |
| 7410 | |
Tejun Heo | 3c5100c | 2006-07-26 16:58:33 +0900 | [diff] [blame] | 7411 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 7412 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7413 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 7414 | int rc = 0; |
| 7415 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7416 | rc = ata_host_suspend(host, mesg); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 7417 | if (rc) |
| 7418 | return rc; |
| 7419 | |
Tejun Heo | 3c5100c | 2006-07-26 16:58:33 +0900 | [diff] [blame] | 7420 | ata_pci_device_do_suspend(pdev, mesg); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 7421 | |
| 7422 | return 0; |
| 7423 | } |
| 7424 | |
| 7425 | int ata_pci_device_resume(struct pci_dev *pdev) |
| 7426 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7427 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 7428 | int rc; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 7429 | |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 7430 | rc = ata_pci_device_do_resume(pdev); |
| 7431 | if (rc == 0) |
| 7432 | ata_host_resume(host); |
| 7433 | return rc; |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 7434 | } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 7435 | #endif /* CONFIG_PM */ |
| 7436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7437 | #endif /* CONFIG_PCI */ |
| 7438 | |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 7439 | static int __init ata_parse_force_one(char **cur, |
| 7440 | struct ata_force_ent *force_ent, |
| 7441 | const char **reason) |
| 7442 | { |
| 7443 | /* FIXME: Currently, there's no way to tag init const data and |
| 7444 | * using __initdata causes build failure on some versions of |
| 7445 | * gcc. Once __initdataconst is implemented, add const to the |
| 7446 | * following structure. |
| 7447 | */ |
| 7448 | static struct ata_force_param force_tbl[] __initdata = { |
| 7449 | { "40c", .cbl = ATA_CBL_PATA40 }, |
| 7450 | { "80c", .cbl = ATA_CBL_PATA80 }, |
| 7451 | { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, |
| 7452 | { "unk", .cbl = ATA_CBL_PATA_UNK }, |
| 7453 | { "ign", .cbl = ATA_CBL_PATA_IGN }, |
| 7454 | { "sata", .cbl = ATA_CBL_SATA }, |
| 7455 | { "1.5Gbps", .spd_limit = 1 }, |
| 7456 | { "3.0Gbps", .spd_limit = 2 }, |
| 7457 | { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, |
| 7458 | { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, |
| 7459 | { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, |
| 7460 | { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, |
| 7461 | { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, |
| 7462 | { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, |
| 7463 | { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, |
| 7464 | { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, |
| 7465 | { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, |
| 7466 | { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, |
| 7467 | { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, |
| 7468 | { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, |
| 7469 | { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, |
| 7470 | { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, |
| 7471 | { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, |
| 7472 | { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, |
| 7473 | { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, |
| 7474 | { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, |
| 7475 | { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, |
| 7476 | { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, |
| 7477 | { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, |
| 7478 | { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, |
| 7479 | { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, |
| 7480 | { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, |
| 7481 | { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, |
| 7482 | { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, |
| 7483 | { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, |
| 7484 | { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, |
| 7485 | { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, |
| 7486 | { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, |
| 7487 | { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, |
| 7488 | { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, |
| 7489 | { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, |
| 7490 | { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, |
| 7491 | { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, |
| 7492 | { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, |
| 7493 | }; |
| 7494 | char *start = *cur, *p = *cur; |
| 7495 | char *id, *val, *endp; |
| 7496 | const struct ata_force_param *match_fp = NULL; |
| 7497 | int nr_matches = 0, i; |
| 7498 | |
| 7499 | /* find where this param ends and update *cur */ |
| 7500 | while (*p != '\0' && *p != ',') |
| 7501 | p++; |
| 7502 | |
| 7503 | if (*p == '\0') |
| 7504 | *cur = p; |
| 7505 | else |
| 7506 | *cur = p + 1; |
| 7507 | |
| 7508 | *p = '\0'; |
| 7509 | |
| 7510 | /* parse */ |
| 7511 | p = strchr(start, ':'); |
| 7512 | if (!p) { |
| 7513 | val = strstrip(start); |
| 7514 | goto parse_val; |
| 7515 | } |
| 7516 | *p = '\0'; |
| 7517 | |
| 7518 | id = strstrip(start); |
| 7519 | val = strstrip(p + 1); |
| 7520 | |
| 7521 | /* parse id */ |
| 7522 | p = strchr(id, '.'); |
| 7523 | if (p) { |
| 7524 | *p++ = '\0'; |
| 7525 | force_ent->device = simple_strtoul(p, &endp, 10); |
| 7526 | if (p == endp || *endp != '\0') { |
| 7527 | *reason = "invalid device"; |
| 7528 | return -EINVAL; |
| 7529 | } |
| 7530 | } |
| 7531 | |
| 7532 | force_ent->port = simple_strtoul(id, &endp, 10); |
| 7533 | if (p == endp || *endp != '\0') { |
| 7534 | *reason = "invalid port/link"; |
| 7535 | return -EINVAL; |
| 7536 | } |
| 7537 | |
| 7538 | parse_val: |
| 7539 | /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ |
| 7540 | for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { |
| 7541 | const struct ata_force_param *fp = &force_tbl[i]; |
| 7542 | |
| 7543 | if (strncasecmp(val, fp->name, strlen(val))) |
| 7544 | continue; |
| 7545 | |
| 7546 | nr_matches++; |
| 7547 | match_fp = fp; |
| 7548 | |
| 7549 | if (strcasecmp(val, fp->name) == 0) { |
| 7550 | nr_matches = 1; |
| 7551 | break; |
| 7552 | } |
| 7553 | } |
| 7554 | |
| 7555 | if (!nr_matches) { |
| 7556 | *reason = "unknown value"; |
| 7557 | return -EINVAL; |
| 7558 | } |
| 7559 | if (nr_matches > 1) { |
| 7560 | *reason = "ambigious value"; |
| 7561 | return -EINVAL; |
| 7562 | } |
| 7563 | |
| 7564 | force_ent->param = *match_fp; |
| 7565 | |
| 7566 | return 0; |
| 7567 | } |
| 7568 | |
| 7569 | static void __init ata_parse_force_param(void) |
| 7570 | { |
| 7571 | int idx = 0, size = 1; |
| 7572 | int last_port = -1, last_device = -1; |
| 7573 | char *p, *cur, *next; |
| 7574 | |
| 7575 | /* calculate maximum number of params and allocate force_tbl */ |
| 7576 | for (p = ata_force_param_buf; *p; p++) |
| 7577 | if (*p == ',') |
| 7578 | size++; |
| 7579 | |
| 7580 | ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); |
| 7581 | if (!ata_force_tbl) { |
| 7582 | printk(KERN_WARNING "ata: failed to extend force table, " |
| 7583 | "libata.force ignored\n"); |
| 7584 | return; |
| 7585 | } |
| 7586 | |
| 7587 | /* parse and populate the table */ |
| 7588 | for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { |
| 7589 | const char *reason = ""; |
| 7590 | struct ata_force_ent te = { .port = -1, .device = -1 }; |
| 7591 | |
| 7592 | next = cur; |
| 7593 | if (ata_parse_force_one(&next, &te, &reason)) { |
| 7594 | printk(KERN_WARNING "ata: failed to parse force " |
| 7595 | "parameter \"%s\" (%s)\n", |
| 7596 | cur, reason); |
| 7597 | continue; |
| 7598 | } |
| 7599 | |
| 7600 | if (te.port == -1) { |
| 7601 | te.port = last_port; |
| 7602 | te.device = last_device; |
| 7603 | } |
| 7604 | |
| 7605 | ata_force_tbl[idx++] = te; |
| 7606 | |
| 7607 | last_port = te.port; |
| 7608 | last_device = te.device; |
| 7609 | } |
| 7610 | |
| 7611 | ata_force_tbl_size = idx; |
| 7612 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7614 | static int __init ata_init(void) |
| 7615 | { |
Andrew Morton | a8601e5 | 2006-06-25 01:36:52 -0700 | [diff] [blame] | 7616 | ata_probe_timeout *= HZ; |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 7617 | |
| 7618 | ata_parse_force_param(); |
| 7619 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7620 | ata_wq = create_workqueue("ata"); |
| 7621 | if (!ata_wq) |
| 7622 | return -ENOMEM; |
| 7623 | |
Tejun Heo | 453b07a | 2006-05-31 18:27:42 +0900 | [diff] [blame] | 7624 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
| 7625 | if (!ata_aux_wq) { |
| 7626 | destroy_workqueue(ata_wq); |
| 7627 | return -ENOMEM; |
| 7628 | } |
| 7629 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7630 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
| 7631 | return 0; |
| 7632 | } |
| 7633 | |
| 7634 | static void __exit ata_exit(void) |
| 7635 | { |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 7636 | kfree(ata_force_tbl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7637 | destroy_workqueue(ata_wq); |
Tejun Heo | 453b07a | 2006-05-31 18:27:42 +0900 | [diff] [blame] | 7638 | destroy_workqueue(ata_aux_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7639 | } |
| 7640 | |
Brian King | a462508 | 2006-11-13 16:32:36 -0600 | [diff] [blame] | 7641 | subsys_initcall(ata_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7642 | module_exit(ata_exit); |
| 7643 | |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 7644 | static unsigned long ratelimit_time; |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 7645 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 7646 | |
| 7647 | int ata_ratelimit(void) |
| 7648 | { |
| 7649 | int rc; |
| 7650 | unsigned long flags; |
| 7651 | |
| 7652 | spin_lock_irqsave(&ata_ratelimit_lock, flags); |
| 7653 | |
| 7654 | if (time_after(jiffies, ratelimit_time)) { |
| 7655 | rc = 1; |
| 7656 | ratelimit_time = jiffies + (HZ/5); |
| 7657 | } else |
| 7658 | rc = 0; |
| 7659 | |
| 7660 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); |
| 7661 | |
| 7662 | return rc; |
| 7663 | } |
| 7664 | |
Tejun Heo | c22daff | 2006-04-11 22:22:29 +0900 | [diff] [blame] | 7665 | /** |
| 7666 | * ata_wait_register - wait until register value changes |
| 7667 | * @reg: IO-mapped register |
| 7668 | * @mask: Mask to apply to read register value |
| 7669 | * @val: Wait condition |
| 7670 | * @interval_msec: polling interval in milliseconds |
| 7671 | * @timeout_msec: timeout in milliseconds |
| 7672 | * |
| 7673 | * Waiting for some bits of register to change is a common |
| 7674 | * operation for ATA controllers. This function reads 32bit LE |
| 7675 | * IO-mapped register @reg and tests for the following condition. |
| 7676 | * |
| 7677 | * (*@reg & mask) != val |
| 7678 | * |
| 7679 | * If the condition is met, it returns; otherwise, the process is |
| 7680 | * repeated after @interval_msec until timeout. |
| 7681 | * |
| 7682 | * LOCKING: |
| 7683 | * Kernel thread context (may sleep) |
| 7684 | * |
| 7685 | * RETURNS: |
| 7686 | * The final register value. |
| 7687 | */ |
| 7688 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, |
| 7689 | unsigned long interval_msec, |
| 7690 | unsigned long timeout_msec) |
| 7691 | { |
| 7692 | unsigned long timeout; |
| 7693 | u32 tmp; |
| 7694 | |
| 7695 | tmp = ioread32(reg); |
| 7696 | |
| 7697 | /* Calculate timeout _after_ the first read to make sure |
| 7698 | * preceding writes reach the controller before starting to |
| 7699 | * eat away the timeout. |
| 7700 | */ |
| 7701 | timeout = jiffies + (timeout_msec * HZ) / 1000; |
| 7702 | |
| 7703 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { |
| 7704 | msleep(interval_msec); |
| 7705 | tmp = ioread32(reg); |
| 7706 | } |
| 7707 | |
| 7708 | return tmp; |
| 7709 | } |
| 7710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7711 | /* |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 7712 | * Dummy port_ops |
| 7713 | */ |
| 7714 | static void ata_dummy_noret(struct ata_port *ap) { } |
| 7715 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } |
| 7716 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } |
| 7717 | |
| 7718 | static u8 ata_dummy_check_status(struct ata_port *ap) |
| 7719 | { |
| 7720 | return ATA_DRDY; |
| 7721 | } |
| 7722 | |
| 7723 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) |
| 7724 | { |
| 7725 | return AC_ERR_SYSTEM; |
| 7726 | } |
| 7727 | |
| 7728 | const struct ata_port_operations ata_dummy_port_ops = { |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 7729 | .check_status = ata_dummy_check_status, |
| 7730 | .check_altstatus = ata_dummy_check_status, |
| 7731 | .dev_select = ata_noop_dev_select, |
| 7732 | .qc_prep = ata_noop_qc_prep, |
| 7733 | .qc_issue = ata_dummy_qc_issue, |
| 7734 | .freeze = ata_dummy_noret, |
| 7735 | .thaw = ata_dummy_noret, |
| 7736 | .error_handler = ata_dummy_noret, |
| 7737 | .post_internal_cmd = ata_dummy_qc_noret, |
| 7738 | .irq_clear = ata_dummy_noret, |
| 7739 | .port_start = ata_dummy_ret0, |
| 7740 | .port_stop = ata_dummy_noret, |
| 7741 | }; |
| 7742 | |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7743 | const struct ata_port_info ata_dummy_port_info = { |
| 7744 | .port_ops = &ata_dummy_port_ops, |
| 7745 | }; |
| 7746 | |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 7747 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7748 | * libata is essentially a library of internal helper functions for |
| 7749 | * low-level ATA host controller drivers. As such, the API/ABI is |
| 7750 | * likely to change as new drivers are added and updated. |
| 7751 | * Do not depend on ABI/API stability. |
| 7752 | */ |
Tejun Heo | e9c8391 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 7753 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
| 7754 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); |
| 7755 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 7756 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7757 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7758 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
| 7759 | EXPORT_SYMBOL_GPL(ata_std_ports); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7760 | EXPORT_SYMBOL_GPL(ata_host_init); |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7761 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7762 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 7763 | EXPORT_SYMBOL_GPL(ata_host_start); |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7764 | EXPORT_SYMBOL_GPL(ata_host_register); |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 7765 | EXPORT_SYMBOL_GPL(ata_host_activate); |
Tejun Heo | 0529c15 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 7766 | EXPORT_SYMBOL_GPL(ata_host_detach); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7767 | EXPORT_SYMBOL_GPL(ata_sg_init); |
Tejun Heo | 9a1004d | 2006-05-31 18:27:52 +0900 | [diff] [blame] | 7768 | EXPORT_SYMBOL_GPL(ata_hsm_move); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 7769 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 7770 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7771 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7772 | EXPORT_SYMBOL_GPL(ata_tf_load); |
| 7773 | EXPORT_SYMBOL_GPL(ata_tf_read); |
| 7774 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); |
| 7775 | EXPORT_SYMBOL_GPL(ata_std_dev_select); |
Jeff Garzik | 43727fb | 2007-02-25 16:50:52 -0500 | [diff] [blame] | 7776 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7777 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
| 7778 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); |
Tejun Heo | 6357357 | 2007-11-27 19:43:39 +0900 | [diff] [blame] | 7779 | EXPORT_SYMBOL_GPL(ata_pack_xfermask); |
| 7780 | EXPORT_SYMBOL_GPL(ata_unpack_xfermask); |
| 7781 | EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); |
| 7782 | EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); |
| 7783 | EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); |
| 7784 | EXPORT_SYMBOL_GPL(ata_mode_string); |
| 7785 | EXPORT_SYMBOL_GPL(ata_id_xfermask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7786 | EXPORT_SYMBOL_GPL(ata_check_status); |
| 7787 | EXPORT_SYMBOL_GPL(ata_altstatus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7788 | EXPORT_SYMBOL_GPL(ata_exec_command); |
| 7789 | EXPORT_SYMBOL_GPL(ata_port_start); |
Alan Cox | d92e74d | 2007-06-07 16:19:15 +0100 | [diff] [blame] | 7790 | EXPORT_SYMBOL_GPL(ata_sff_port_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7791 | EXPORT_SYMBOL_GPL(ata_interrupt); |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 7792 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 7793 | EXPORT_SYMBOL_GPL(ata_data_xfer); |
| 7794 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); |
Tejun Heo | 31cc23b | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 7795 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7796 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 7797 | EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); |
Brian King | e46834c | 2006-03-17 17:04:03 -0600 | [diff] [blame] | 7798 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7799 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
| 7800 | EXPORT_SYMBOL_GPL(ata_bmdma_start); |
| 7801 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); |
| 7802 | EXPORT_SYMBOL_GPL(ata_bmdma_status); |
| 7803 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 7804 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
| 7805 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); |
| 7806 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); |
| 7807 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); |
| 7808 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7809 | EXPORT_SYMBOL_GPL(ata_port_probe); |
Alan | 10305f0 | 2007-02-20 18:01:59 +0000 | [diff] [blame] | 7810 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 7811 | EXPORT_SYMBOL_GPL(sata_set_spd); |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 7812 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
| 7813 | EXPORT_SYMBOL_GPL(sata_link_resume); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7814 | EXPORT_SYMBOL_GPL(ata_bus_reset); |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 7815 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 7816 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 7817 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 7818 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
| 7819 | EXPORT_SYMBOL_GPL(ata_std_postreset); |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 7820 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
| 7821 | EXPORT_SYMBOL_GPL(ata_dev_pair); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7822 | EXPORT_SYMBOL_GPL(ata_port_disable); |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 7823 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
Tejun Heo | c22daff | 2006-04-11 22:22:29 +0900 | [diff] [blame] | 7824 | EXPORT_SYMBOL_GPL(ata_wait_register); |
Tejun Heo | 6f8b995 | 2006-01-24 17:05:21 +0900 | [diff] [blame] | 7825 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
Tejun Heo | 88ff6ea | 2007-10-16 14:21:24 -0700 | [diff] [blame] | 7826 | EXPORT_SYMBOL_GPL(ata_wait_after_reset); |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 7827 | EXPORT_SYMBOL_GPL(ata_wait_ready); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7828 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
| 7829 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7830 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
Tejun Heo | 83c47bc | 2006-05-31 18:28:07 +0900 | [diff] [blame] | 7831 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 7832 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7833 | EXPORT_SYMBOL_GPL(ata_host_intr); |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 7834 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
| 7835 | EXPORT_SYMBOL_GPL(sata_scr_read); |
| 7836 | EXPORT_SYMBOL_GPL(sata_scr_write); |
| 7837 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 7838 | EXPORT_SYMBOL_GPL(ata_link_online); |
| 7839 | EXPORT_SYMBOL_GPL(ata_link_offline); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 7840 | #ifdef CONFIG_PM |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 7841 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
| 7842 | EXPORT_SYMBOL_GPL(ata_host_resume); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 7843 | #endif /* CONFIG_PM */ |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 7844 | EXPORT_SYMBOL_GPL(ata_id_string); |
| 7845 | EXPORT_SYMBOL_GPL(ata_id_c_string); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7846 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
| 7847 | |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 7848 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
Tejun Heo | 6357357 | 2007-11-27 19:43:39 +0900 | [diff] [blame] | 7849 | EXPORT_SYMBOL_GPL(ata_timing_find_mode); |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 7850 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
| 7851 | EXPORT_SYMBOL_GPL(ata_timing_merge); |
Tejun Heo | a0f79b9 | 2007-12-18 16:33:05 +0900 | [diff] [blame] | 7852 | EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 7853 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7854 | #ifdef CONFIG_PCI |
| 7855 | EXPORT_SYMBOL_GPL(pci_test_config_bits); |
Tejun Heo | d583bc1 | 2007-07-04 18:02:07 +0900 | [diff] [blame] | 7856 | EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 7857 | EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); |
Tejun Heo | d583bc1 | 2007-07-04 18:02:07 +0900 | [diff] [blame] | 7858 | EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 7859 | EXPORT_SYMBOL_GPL(ata_pci_activate_sff_host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7860 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
| 7861 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 7862 | #ifdef CONFIG_PM |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 7863 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
| 7864 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 7865 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
| 7866 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 7867 | #endif /* CONFIG_PM */ |
Alan Cox | 67951ad | 2006-03-22 15:55:54 +0000 | [diff] [blame] | 7868 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
| 7869 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7870 | #endif /* CONFIG_PCI */ |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 7871 | |
Tejun Heo | 31f8838 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 7872 | EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); |
Tejun Heo | 3af9a77 | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 7873 | EXPORT_SYMBOL_GPL(sata_pmp_std_prereset); |
| 7874 | EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset); |
| 7875 | EXPORT_SYMBOL_GPL(sata_pmp_std_postreset); |
| 7876 | EXPORT_SYMBOL_GPL(sata_pmp_do_eh); |
| 7877 | |
Tejun Heo | b64bbc3 | 2007-07-16 14:29:39 +0900 | [diff] [blame] | 7878 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
| 7879 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); |
| 7880 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 7881 | EXPORT_SYMBOL_GPL(ata_port_desc); |
| 7882 | #ifdef CONFIG_PCI |
| 7883 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); |
| 7884 | #endif /* CONFIG_PCI */ |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 7885 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
Tejun Heo | dbd8261 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 7886 | EXPORT_SYMBOL_GPL(ata_link_abort); |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 7887 | EXPORT_SYMBOL_GPL(ata_port_abort); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 7888 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 7889 | EXPORT_SYMBOL_GPL(sata_async_notification); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 7890 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
| 7891 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 7892 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
| 7893 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 7894 | EXPORT_SYMBOL_GPL(ata_do_eh); |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 7895 | EXPORT_SYMBOL_GPL(ata_irq_on); |
Akira Iguchi | a619f981b | 2007-01-26 16:28:18 +0900 | [diff] [blame] | 7896 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 7897 | |
| 7898 | EXPORT_SYMBOL_GPL(ata_cable_40wire); |
| 7899 | EXPORT_SYMBOL_GPL(ata_cable_80wire); |
| 7900 | EXPORT_SYMBOL_GPL(ata_cable_unknown); |
Tejun Heo | c88f90c | 2007-11-27 19:43:48 +0900 | [diff] [blame] | 7901 | EXPORT_SYMBOL_GPL(ata_cable_ignore); |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 7902 | EXPORT_SYMBOL_GPL(ata_cable_sata); |