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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | */ |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/kernel.h> |
| 36 | #include <linux/module.h> |
| 37 | #include <linux/pci.h> |
| 38 | #include <linux/init.h> |
| 39 | #include <linux/list.h> |
| 40 | #include <linux/mm.h> |
| 41 | #include <linux/highmem.h> |
| 42 | #include <linux/spinlock.h> |
| 43 | #include <linux/blkdev.h> |
| 44 | #include <linux/delay.h> |
| 45 | #include <linux/timer.h> |
| 46 | #include <linux/interrupt.h> |
| 47 | #include <linux/completion.h> |
| 48 | #include <linux/suspend.h> |
| 49 | #include <linux/workqueue.h> |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 50 | #include <linux/jiffies.h> |
David Hardeman | 378f058 | 2005-09-17 17:55:31 +1000 | [diff] [blame] | 51 | #include <linux/scatterlist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <scsi/scsi.h> |
Jeff Garzik | 193515d | 2005-11-07 00:59:37 -0500 | [diff] [blame] | 53 | #include <scsi/scsi_cmnd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #include <scsi/scsi_host.h> |
| 55 | #include <linux/libata.h> |
| 56 | #include <asm/io.h> |
| 57 | #include <asm/semaphore.h> |
| 58 | #include <asm/byteorder.h> |
| 59 | |
| 60 | #include "libata.h" |
| 61 | |
Jeff Garzik | 8bc3fc4 | 2007-05-21 20:26:38 -0400 | [diff] [blame] | 62 | #define DRV_VERSION "2.21" /* must be exactly four chars */ |
Jeff Garzik | fda0efc | 2007-01-31 07:43:15 -0500 | [diff] [blame] | 63 | |
| 64 | |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 65 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
Tejun Heo | e9c8391 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 66 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
| 67 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; |
| 68 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 69 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 70 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
| 71 | u16 heads, u16 sectors); |
| 72 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); |
| 73 | static void ata_dev_xfermask(struct ata_device *dev); |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 74 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 76 | unsigned int ata_print_id = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | static struct workqueue_struct *ata_wq; |
| 78 | |
Tejun Heo | 453b07a | 2006-05-31 18:27:42 +0900 | [diff] [blame] | 79 | struct workqueue_struct *ata_aux_wq; |
| 80 | |
Jeff Garzik | 418dc1f | 2006-03-11 20:50:08 -0500 | [diff] [blame] | 81 | int atapi_enabled = 1; |
Jeff Garzik | 1623c81 | 2005-08-30 03:37:42 -0400 | [diff] [blame] | 82 | module_param(atapi_enabled, int, 0444); |
| 83 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); |
| 84 | |
Albert Lee | 95de719 | 2006-04-04 10:57:18 +0800 | [diff] [blame] | 85 | int atapi_dmadir = 0; |
| 86 | module_param(atapi_dmadir, int, 0444); |
| 87 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); |
| 88 | |
Jeff Garzik | c3c013a | 2006-02-27 22:31:19 -0500 | [diff] [blame] | 89 | int libata_fua = 0; |
| 90 | module_param_named(fua, libata_fua, int, 0444); |
| 91 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); |
| 92 | |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 93 | static int ata_ignore_hpa = 0; |
| 94 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
| 95 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); |
| 96 | |
Andrew Morton | a8601e5 | 2006-06-25 01:36:52 -0700 | [diff] [blame] | 97 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
| 98 | module_param(ata_probe_timeout, int, 0444); |
| 99 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); |
| 100 | |
Jeff Garzik | d7d0dad | 2007-03-28 01:57:37 -0400 | [diff] [blame] | 101 | int libata_noacpi = 1; |
| 102 | module_param_named(noacpi, libata_noacpi, int, 0444); |
Kristen Carlson Accardi | 11ef697 | 2006-09-28 11:29:01 -0700 | [diff] [blame] | 103 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | MODULE_AUTHOR("Jeff Garzik"); |
| 106 | MODULE_DESCRIPTION("Library module for ATA devices"); |
| 107 | MODULE_LICENSE("GPL"); |
| 108 | MODULE_VERSION(DRV_VERSION); |
| 109 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 110 | |
| 111 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure |
| 113 | * @tf: Taskfile to convert |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | * @pmp: Port multiplier port |
Tejun Heo | 9977126 | 2007-07-16 14:29:38 +0900 | [diff] [blame] | 115 | * @is_cmd: This FIS is for command |
| 116 | * @fis: Buffer into which data will output |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | * |
| 118 | * Converts a standard ATA taskfile to a Serial ATA |
| 119 | * FIS structure (Register - Host to Device). |
| 120 | * |
| 121 | * LOCKING: |
| 122 | * Inherited from caller. |
| 123 | */ |
Tejun Heo | 9977126 | 2007-07-16 14:29:38 +0900 | [diff] [blame] | 124 | 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] | 125 | { |
Tejun Heo | 9977126 | 2007-07-16 14:29:38 +0900 | [diff] [blame] | 126 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
| 127 | fis[1] = pmp & 0xf; /* Port multiplier number*/ |
| 128 | if (is_cmd) |
| 129 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ |
| 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | fis[2] = tf->command; |
| 132 | fis[3] = tf->feature; |
| 133 | |
| 134 | fis[4] = tf->lbal; |
| 135 | fis[5] = tf->lbam; |
| 136 | fis[6] = tf->lbah; |
| 137 | fis[7] = tf->device; |
| 138 | |
| 139 | fis[8] = tf->hob_lbal; |
| 140 | fis[9] = tf->hob_lbam; |
| 141 | fis[10] = tf->hob_lbah; |
| 142 | fis[11] = tf->hob_feature; |
| 143 | |
| 144 | fis[12] = tf->nsect; |
| 145 | fis[13] = tf->hob_nsect; |
| 146 | fis[14] = 0; |
| 147 | fis[15] = tf->ctl; |
| 148 | |
| 149 | fis[16] = 0; |
| 150 | fis[17] = 0; |
| 151 | fis[18] = 0; |
| 152 | fis[19] = 0; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile |
| 157 | * @fis: Buffer from which data will be input |
| 158 | * @tf: Taskfile to output |
| 159 | * |
Mark Lord | e12a1be | 2005-11-12 18:55:45 -0500 | [diff] [blame] | 160 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | * |
| 162 | * LOCKING: |
| 163 | * Inherited from caller. |
| 164 | */ |
| 165 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 166 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | { |
| 168 | tf->command = fis[2]; /* status */ |
| 169 | tf->feature = fis[3]; /* error */ |
| 170 | |
| 171 | tf->lbal = fis[4]; |
| 172 | tf->lbam = fis[5]; |
| 173 | tf->lbah = fis[6]; |
| 174 | tf->device = fis[7]; |
| 175 | |
| 176 | tf->hob_lbal = fis[8]; |
| 177 | tf->hob_lbam = fis[9]; |
| 178 | tf->hob_lbah = fis[10]; |
| 179 | |
| 180 | tf->nsect = fis[12]; |
| 181 | tf->hob_nsect = fis[13]; |
| 182 | } |
| 183 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 184 | static const u8 ata_rw_cmds[] = { |
| 185 | /* pio multi */ |
| 186 | ATA_CMD_READ_MULTI, |
| 187 | ATA_CMD_WRITE_MULTI, |
| 188 | ATA_CMD_READ_MULTI_EXT, |
| 189 | ATA_CMD_WRITE_MULTI_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 190 | 0, |
| 191 | 0, |
| 192 | 0, |
| 193 | ATA_CMD_WRITE_MULTI_FUA_EXT, |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 194 | /* pio */ |
| 195 | ATA_CMD_PIO_READ, |
| 196 | ATA_CMD_PIO_WRITE, |
| 197 | ATA_CMD_PIO_READ_EXT, |
| 198 | ATA_CMD_PIO_WRITE_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 199 | 0, |
| 200 | 0, |
| 201 | 0, |
| 202 | 0, |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 203 | /* dma */ |
| 204 | ATA_CMD_READ, |
| 205 | ATA_CMD_WRITE, |
| 206 | ATA_CMD_READ_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 207 | ATA_CMD_WRITE_EXT, |
| 208 | 0, |
| 209 | 0, |
| 210 | 0, |
| 211 | ATA_CMD_WRITE_FUA_EXT |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 212 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
| 214 | /** |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 215 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 216 | * @tf: command to examine and configure |
| 217 | * @dev: device tf belongs to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | * |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 219 | * Examine the device configuration and tf->flags to calculate |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 220 | * the proper read/write commands and protocol to use. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | * |
| 222 | * LOCKING: |
| 223 | * caller. |
| 224 | */ |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 225 | 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] | 226 | { |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 227 | u8 cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 229 | int index, fua, lba48, write; |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 230 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 231 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 232 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
| 233 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 235 | if (dev->flags & ATA_DFLAG_PIO) { |
| 236 | tf->protocol = ATA_PROT_PIO; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 237 | index = dev->multi_count ? 0 : 8; |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 238 | } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { |
Alan Cox | 8d238e0 | 2006-01-17 20:50:31 +0000 | [diff] [blame] | 239 | /* Unable to use DMA due to host limitation */ |
| 240 | tf->protocol = ATA_PROT_PIO; |
Albert Lee | 0565c26 | 2006-02-13 18:55:25 +0800 | [diff] [blame] | 241 | index = dev->multi_count ? 0 : 8; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 242 | } else { |
| 243 | tf->protocol = ATA_PROT_DMA; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 244 | index = 16; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 245 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 247 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
| 248 | if (cmd) { |
| 249 | tf->command = cmd; |
| 250 | return 0; |
| 251 | } |
| 252 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 255 | /** |
Tejun Heo | 35b649f | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 256 | * ata_tf_read_block - Read block address from ATA taskfile |
| 257 | * @tf: ATA taskfile of interest |
| 258 | * @dev: ATA device @tf belongs to |
| 259 | * |
| 260 | * LOCKING: |
| 261 | * None. |
| 262 | * |
| 263 | * Read block address from @tf. This function can handle all |
| 264 | * three address formats - LBA, LBA48 and CHS. tf->protocol and |
| 265 | * flags select the address format to use. |
| 266 | * |
| 267 | * RETURNS: |
| 268 | * Block address read from @tf. |
| 269 | */ |
| 270 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) |
| 271 | { |
| 272 | u64 block = 0; |
| 273 | |
| 274 | if (tf->flags & ATA_TFLAG_LBA) { |
| 275 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 276 | block |= (u64)tf->hob_lbah << 40; |
| 277 | block |= (u64)tf->hob_lbam << 32; |
| 278 | block |= tf->hob_lbal << 24; |
| 279 | } else |
| 280 | block |= (tf->device & 0xf) << 24; |
| 281 | |
| 282 | block |= tf->lbah << 16; |
| 283 | block |= tf->lbam << 8; |
| 284 | block |= tf->lbal; |
| 285 | } else { |
| 286 | u32 cyl, head, sect; |
| 287 | |
| 288 | cyl = tf->lbam | (tf->lbah << 8); |
| 289 | head = tf->device & 0xf; |
| 290 | sect = tf->lbal; |
| 291 | |
| 292 | block = (cyl * dev->heads + head) * dev->sectors + sect; |
| 293 | } |
| 294 | |
| 295 | return block; |
| 296 | } |
| 297 | |
| 298 | /** |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 299 | * ata_build_rw_tf - Build ATA taskfile for given read/write request |
| 300 | * @tf: Target ATA taskfile |
| 301 | * @dev: ATA device @tf belongs to |
| 302 | * @block: Block address |
| 303 | * @n_block: Number of blocks |
| 304 | * @tf_flags: RW/FUA etc... |
| 305 | * @tag: tag |
| 306 | * |
| 307 | * LOCKING: |
| 308 | * None. |
| 309 | * |
| 310 | * Build ATA taskfile @tf for read/write request described by |
| 311 | * @block, @n_block, @tf_flags and @tag on @dev. |
| 312 | * |
| 313 | * RETURNS: |
| 314 | * |
| 315 | * 0 on success, -ERANGE if the request is too large for @dev, |
| 316 | * -EINVAL if the request is invalid. |
| 317 | */ |
| 318 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, |
| 319 | u64 block, u32 n_block, unsigned int tf_flags, |
| 320 | unsigned int tag) |
| 321 | { |
| 322 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 323 | tf->flags |= tf_flags; |
| 324 | |
Tejun Heo | 6d1245b | 2007-02-20 23:20:27 +0900 | [diff] [blame] | 325 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 326 | /* yay, NCQ */ |
| 327 | if (!lba_48_ok(block, n_block)) |
| 328 | return -ERANGE; |
| 329 | |
| 330 | tf->protocol = ATA_PROT_NCQ; |
| 331 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
| 332 | |
| 333 | if (tf->flags & ATA_TFLAG_WRITE) |
| 334 | tf->command = ATA_CMD_FPDMA_WRITE; |
| 335 | else |
| 336 | tf->command = ATA_CMD_FPDMA_READ; |
| 337 | |
| 338 | tf->nsect = tag << 3; |
| 339 | tf->hob_feature = (n_block >> 8) & 0xff; |
| 340 | tf->feature = n_block & 0xff; |
| 341 | |
| 342 | tf->hob_lbah = (block >> 40) & 0xff; |
| 343 | tf->hob_lbam = (block >> 32) & 0xff; |
| 344 | tf->hob_lbal = (block >> 24) & 0xff; |
| 345 | tf->lbah = (block >> 16) & 0xff; |
| 346 | tf->lbam = (block >> 8) & 0xff; |
| 347 | tf->lbal = block & 0xff; |
| 348 | |
| 349 | tf->device = 1 << 6; |
| 350 | if (tf->flags & ATA_TFLAG_FUA) |
| 351 | tf->device |= 1 << 7; |
| 352 | } else if (dev->flags & ATA_DFLAG_LBA) { |
| 353 | tf->flags |= ATA_TFLAG_LBA; |
| 354 | |
| 355 | if (lba_28_ok(block, n_block)) { |
| 356 | /* use LBA28 */ |
| 357 | tf->device |= (block >> 24) & 0xf; |
| 358 | } else if (lba_48_ok(block, n_block)) { |
| 359 | if (!(dev->flags & ATA_DFLAG_LBA48)) |
| 360 | return -ERANGE; |
| 361 | |
| 362 | /* use LBA48 */ |
| 363 | tf->flags |= ATA_TFLAG_LBA48; |
| 364 | |
| 365 | tf->hob_nsect = (n_block >> 8) & 0xff; |
| 366 | |
| 367 | tf->hob_lbah = (block >> 40) & 0xff; |
| 368 | tf->hob_lbam = (block >> 32) & 0xff; |
| 369 | tf->hob_lbal = (block >> 24) & 0xff; |
| 370 | } else |
| 371 | /* request too large even for LBA48 */ |
| 372 | return -ERANGE; |
| 373 | |
| 374 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) |
| 375 | return -EINVAL; |
| 376 | |
| 377 | tf->nsect = n_block & 0xff; |
| 378 | |
| 379 | tf->lbah = (block >> 16) & 0xff; |
| 380 | tf->lbam = (block >> 8) & 0xff; |
| 381 | tf->lbal = block & 0xff; |
| 382 | |
| 383 | tf->device |= ATA_LBA; |
| 384 | } else { |
| 385 | /* CHS */ |
| 386 | u32 sect, head, cyl, track; |
| 387 | |
| 388 | /* The request -may- be too large for CHS addressing. */ |
| 389 | if (!lba_28_ok(block, n_block)) |
| 390 | return -ERANGE; |
| 391 | |
| 392 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) |
| 393 | return -EINVAL; |
| 394 | |
| 395 | /* Convert LBA to CHS */ |
| 396 | track = (u32)block / dev->sectors; |
| 397 | cyl = track / dev->heads; |
| 398 | head = track % dev->heads; |
| 399 | sect = (u32)block % dev->sectors + 1; |
| 400 | |
| 401 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
| 402 | (u32)block, track, cyl, head, sect); |
| 403 | |
| 404 | /* Check whether the converted CHS can fit. |
| 405 | Cylinder: 0-65535 |
| 406 | Head: 0-15 |
| 407 | Sector: 1-255*/ |
| 408 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
| 409 | return -ERANGE; |
| 410 | |
| 411 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ |
| 412 | tf->lbal = sect; |
| 413 | tf->lbam = cyl; |
| 414 | tf->lbah = cyl >> 8; |
| 415 | tf->device |= head; |
| 416 | } |
| 417 | |
| 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | /** |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 422 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask |
| 423 | * @pio_mask: pio_mask |
| 424 | * @mwdma_mask: mwdma_mask |
| 425 | * @udma_mask: udma_mask |
| 426 | * |
| 427 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single |
| 428 | * unsigned int xfer_mask. |
| 429 | * |
| 430 | * LOCKING: |
| 431 | * None. |
| 432 | * |
| 433 | * RETURNS: |
| 434 | * Packed xfer_mask. |
| 435 | */ |
| 436 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, |
| 437 | unsigned int mwdma_mask, |
| 438 | unsigned int udma_mask) |
| 439 | { |
| 440 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | |
| 441 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | |
| 442 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); |
| 443 | } |
| 444 | |
Tejun Heo | c0489e4 | 2006-03-24 14:07:49 +0900 | [diff] [blame] | 445 | /** |
| 446 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks |
| 447 | * @xfer_mask: xfer_mask to unpack |
| 448 | * @pio_mask: resulting pio_mask |
| 449 | * @mwdma_mask: resulting mwdma_mask |
| 450 | * @udma_mask: resulting udma_mask |
| 451 | * |
| 452 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. |
| 453 | * Any NULL distination masks will be ignored. |
| 454 | */ |
| 455 | static void ata_unpack_xfermask(unsigned int xfer_mask, |
| 456 | unsigned int *pio_mask, |
| 457 | unsigned int *mwdma_mask, |
| 458 | unsigned int *udma_mask) |
| 459 | { |
| 460 | if (pio_mask) |
| 461 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; |
| 462 | if (mwdma_mask) |
| 463 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; |
| 464 | if (udma_mask) |
| 465 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; |
| 466 | } |
| 467 | |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 468 | static const struct ata_xfer_ent { |
Tejun Heo | be9a50c | 2006-03-31 22:48:52 +0900 | [diff] [blame] | 469 | int shift, bits; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 470 | u8 base; |
| 471 | } ata_xfer_tbl[] = { |
| 472 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, |
| 473 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, |
| 474 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, |
| 475 | { -1, }, |
| 476 | }; |
| 477 | |
| 478 | /** |
| 479 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask |
| 480 | * @xfer_mask: xfer_mask of interest |
| 481 | * |
| 482 | * Return matching XFER_* value for @xfer_mask. Only the highest |
| 483 | * bit of @xfer_mask is considered. |
| 484 | * |
| 485 | * LOCKING: |
| 486 | * None. |
| 487 | * |
| 488 | * RETURNS: |
| 489 | * Matching XFER_* value, 0 if no match found. |
| 490 | */ |
| 491 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) |
| 492 | { |
| 493 | int highbit = fls(xfer_mask) - 1; |
| 494 | const struct ata_xfer_ent *ent; |
| 495 | |
| 496 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| 497 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) |
| 498 | return ent->base + highbit - ent->shift; |
| 499 | return 0; |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* |
| 504 | * @xfer_mode: XFER_* of interest |
| 505 | * |
| 506 | * Return matching xfer_mask for @xfer_mode. |
| 507 | * |
| 508 | * LOCKING: |
| 509 | * None. |
| 510 | * |
| 511 | * RETURNS: |
| 512 | * Matching xfer_mask, 0 if no match found. |
| 513 | */ |
| 514 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) |
| 515 | { |
| 516 | const struct ata_xfer_ent *ent; |
| 517 | |
| 518 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| 519 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) |
| 520 | return 1 << (ent->shift + xfer_mode - ent->base); |
| 521 | return 0; |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* |
| 526 | * @xfer_mode: XFER_* of interest |
| 527 | * |
| 528 | * Return matching xfer_shift for @xfer_mode. |
| 529 | * |
| 530 | * LOCKING: |
| 531 | * None. |
| 532 | * |
| 533 | * RETURNS: |
| 534 | * Matching xfer_shift, -1 if no match found. |
| 535 | */ |
| 536 | static int ata_xfer_mode2shift(unsigned int xfer_mode) |
| 537 | { |
| 538 | const struct ata_xfer_ent *ent; |
| 539 | |
| 540 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| 541 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) |
| 542 | return ent->shift; |
| 543 | return -1; |
| 544 | } |
| 545 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | /** |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 547 | * ata_mode_string - convert xfer_mask to string |
| 548 | * @xfer_mask: mask of bits supported; only highest bit counts. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | * |
| 550 | * Determine string which represents the highest speed |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 551 | * (highest bit in @modemask). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | * |
| 553 | * LOCKING: |
| 554 | * None. |
| 555 | * |
| 556 | * RETURNS: |
| 557 | * Constant C string representing highest speed listed in |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 558 | * @mode_mask, or the constant C string "<n/a>". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | */ |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 560 | static const char *ata_mode_string(unsigned int xfer_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | { |
Tejun Heo | 75f554b | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 562 | static const char * const xfer_mode_str[] = { |
| 563 | "PIO0", |
| 564 | "PIO1", |
| 565 | "PIO2", |
| 566 | "PIO3", |
| 567 | "PIO4", |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 568 | "PIO5", |
| 569 | "PIO6", |
Tejun Heo | 75f554b | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 570 | "MWDMA0", |
| 571 | "MWDMA1", |
| 572 | "MWDMA2", |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 573 | "MWDMA3", |
| 574 | "MWDMA4", |
Tejun Heo | 75f554b | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 575 | "UDMA/16", |
| 576 | "UDMA/25", |
| 577 | "UDMA/33", |
| 578 | "UDMA/44", |
| 579 | "UDMA/66", |
| 580 | "UDMA/100", |
| 581 | "UDMA/133", |
| 582 | "UDMA7", |
| 583 | }; |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 584 | int highbit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 586 | highbit = fls(xfer_mask) - 1; |
| 587 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) |
| 588 | return xfer_mode_str[highbit]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | return "<n/a>"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | |
Tejun Heo | 4c360c8 | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 592 | static const char *sata_spd_string(unsigned int spd) |
| 593 | { |
| 594 | static const char * const spd_str[] = { |
| 595 | "1.5 Gbps", |
| 596 | "3.0 Gbps", |
| 597 | }; |
| 598 | |
| 599 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) |
| 600 | return "<unknown>"; |
| 601 | return spd_str[spd - 1]; |
| 602 | } |
| 603 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 604 | void ata_dev_disable(struct ata_device *dev) |
Tejun Heo | 0b8efb0 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 605 | { |
Tejun Heo | 09d7f9b | 2007-06-25 23:34:02 +0900 | [diff] [blame] | 606 | if (ata_dev_enabled(dev)) { |
| 607 | if (ata_msg_drv(dev->ap)) |
| 608 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 609 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
| 610 | ATA_DNXFER_QUIET); |
Tejun Heo | 0b8efb0 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 611 | dev->class++; |
| 612 | } |
| 613 | } |
| 614 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | * ata_devchk - PATA device presence detection |
| 617 | * @ap: ATA channel to examine |
| 618 | * @device: Device to examine (starting at zero) |
| 619 | * |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 620 | * This technique was originally described in |
| 621 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 622 | * later found its way into the ATA/ATAPI spec. |
| 623 | * |
| 624 | * Write a pattern to the ATA shadow registers, |
| 625 | * and if a device is present, it will respond by |
| 626 | * correctly storing and echoing back the |
| 627 | * ATA shadow register contents. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | * |
| 629 | * LOCKING: |
| 630 | * caller. |
| 631 | */ |
| 632 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 633 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 635 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 636 | u8 nsect, lbal; |
| 637 | |
| 638 | ap->ops->dev_select(ap, device); |
| 639 | |
| 640 | iowrite8(0x55, ioaddr->nsect_addr); |
| 641 | iowrite8(0xaa, ioaddr->lbal_addr); |
| 642 | |
| 643 | iowrite8(0xaa, ioaddr->nsect_addr); |
| 644 | iowrite8(0x55, ioaddr->lbal_addr); |
| 645 | |
| 646 | iowrite8(0x55, ioaddr->nsect_addr); |
| 647 | iowrite8(0xaa, ioaddr->lbal_addr); |
| 648 | |
| 649 | nsect = ioread8(ioaddr->nsect_addr); |
| 650 | lbal = ioread8(ioaddr->lbal_addr); |
| 651 | |
| 652 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 653 | return 1; /* we found a device */ |
| 654 | |
| 655 | return 0; /* nothing found */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | /** |
| 659 | * ata_dev_classify - determine device type based on ATA-spec signature |
| 660 | * @tf: ATA taskfile register set for device to be identified |
| 661 | * |
| 662 | * Determine from taskfile register contents whether a device is |
| 663 | * ATA or ATAPI, as per "Signature and persistence" section |
| 664 | * of ATA/PI spec (volume 1, sect 5.14). |
| 665 | * |
| 666 | * LOCKING: |
| 667 | * None. |
| 668 | * |
| 669 | * RETURNS: |
| 670 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN |
| 671 | * the event of failure. |
| 672 | */ |
| 673 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 674 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | { |
| 676 | /* Apple's open source Darwin code hints that some devices only |
| 677 | * put a proper signature into the LBA mid/high registers, |
| 678 | * So, we only check those. It's sufficient for uniqueness. |
| 679 | */ |
| 680 | |
| 681 | if (((tf->lbam == 0) && (tf->lbah == 0)) || |
| 682 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { |
| 683 | DPRINTK("found ATA device by sig\n"); |
| 684 | return ATA_DEV_ATA; |
| 685 | } |
| 686 | |
| 687 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || |
| 688 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { |
| 689 | DPRINTK("found ATAPI device by sig\n"); |
| 690 | return ATA_DEV_ATAPI; |
| 691 | } |
| 692 | |
| 693 | DPRINTK("unknown device\n"); |
| 694 | return ATA_DEV_UNKNOWN; |
| 695 | } |
| 696 | |
| 697 | /** |
| 698 | * ata_dev_try_classify - Parse returned ATA device signature |
| 699 | * @ap: ATA channel to examine |
| 700 | * @device: Device to examine (starting at zero) |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 701 | * @r_err: Value of error register on completion |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | * |
| 703 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, |
| 704 | * an ATA/ATAPI-defined set of values is placed in the ATA |
| 705 | * shadow registers, indicating the results of device detection |
| 706 | * and diagnostics. |
| 707 | * |
| 708 | * Select the ATA device, and read the values from the ATA shadow |
| 709 | * registers. Then parse according to the Error register value, |
| 710 | * and the spec-defined values examined by ata_dev_classify(). |
| 711 | * |
| 712 | * LOCKING: |
| 713 | * caller. |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 714 | * |
| 715 | * RETURNS: |
| 716 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | */ |
| 718 | |
Akira Iguchi | a619f981b | 2007-01-26 16:28:18 +0900 | [diff] [blame] | 719 | unsigned int |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 720 | ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | struct ata_taskfile tf; |
| 723 | unsigned int class; |
| 724 | u8 err; |
| 725 | |
| 726 | ap->ops->dev_select(ap, device); |
| 727 | |
| 728 | memset(&tf, 0, sizeof(tf)); |
| 729 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | ap->ops->tf_read(ap, &tf); |
Jeff Garzik | 0169e28 | 2005-10-29 21:25:10 -0400 | [diff] [blame] | 731 | err = tf.feature; |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 732 | if (r_err) |
| 733 | *r_err = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
Alan Cox | 9359085 | 2006-09-12 16:55:12 +0100 | [diff] [blame] | 735 | /* see if device passed diags: if master then continue and warn later */ |
| 736 | if (err == 0 && device == 0) |
| 737 | /* diagnostic fail : do nothing _YET_ */ |
| 738 | ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; |
| 739 | else if (err == 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | /* do nothing */ ; |
| 741 | else if ((device == 0) && (err == 0x81)) |
| 742 | /* do nothing */ ; |
| 743 | else |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 744 | return ATA_DEV_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 746 | /* determine if device is ATA or ATAPI */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | class = ata_dev_classify(&tf); |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | if (class == ATA_DEV_UNKNOWN) |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 750 | return ATA_DEV_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 752 | return ATA_DEV_NONE; |
| 753 | return class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | } |
| 755 | |
| 756 | /** |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 757 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | * @id: IDENTIFY DEVICE results we will examine |
| 759 | * @s: string into which data is output |
| 760 | * @ofs: offset into identify device page |
| 761 | * @len: length of string to return. must be an even number. |
| 762 | * |
| 763 | * The strings in the IDENTIFY DEVICE page are broken up into |
| 764 | * 16-bit chunks. Run through the string, and output each |
| 765 | * 8-bit chunk linearly, regardless of platform. |
| 766 | * |
| 767 | * LOCKING: |
| 768 | * caller. |
| 769 | */ |
| 770 | |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 771 | void ata_id_string(const u16 *id, unsigned char *s, |
| 772 | unsigned int ofs, unsigned int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | { |
| 774 | unsigned int c; |
| 775 | |
| 776 | while (len > 0) { |
| 777 | c = id[ofs] >> 8; |
| 778 | *s = c; |
| 779 | s++; |
| 780 | |
| 781 | c = id[ofs] & 0xff; |
| 782 | *s = c; |
| 783 | s++; |
| 784 | |
| 785 | ofs++; |
| 786 | len -= 2; |
| 787 | } |
| 788 | } |
| 789 | |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 790 | /** |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 791 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 792 | * @id: IDENTIFY DEVICE results we will examine |
| 793 | * @s: string into which data is output |
| 794 | * @ofs: offset into identify device page |
| 795 | * @len: length of string to return. must be an odd number. |
| 796 | * |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 797 | * This function is identical to ata_id_string except that it |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 798 | * trims trailing spaces and terminates the resulting string with |
| 799 | * null. @len must be actual maximum length (even number) + 1. |
| 800 | * |
| 801 | * LOCKING: |
| 802 | * caller. |
| 803 | */ |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 804 | void ata_id_c_string(const u16 *id, unsigned char *s, |
| 805 | unsigned int ofs, unsigned int len) |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 806 | { |
| 807 | unsigned char *p; |
| 808 | |
| 809 | WARN_ON(!(len & 1)); |
| 810 | |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 811 | ata_id_string(id, s, ofs, len - 1); |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 812 | |
| 813 | p = s + strnlen(s, len - 1); |
| 814 | while (p > s && p[-1] == ' ') |
| 815 | p--; |
| 816 | *p = '\0'; |
| 817 | } |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 818 | |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 819 | static u64 ata_tf_to_lba48(struct ata_taskfile *tf) |
| 820 | { |
| 821 | u64 sectors = 0; |
| 822 | |
| 823 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; |
| 824 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; |
| 825 | sectors |= (tf->hob_lbal & 0xff) << 24; |
| 826 | sectors |= (tf->lbah & 0xff) << 16; |
| 827 | sectors |= (tf->lbam & 0xff) << 8; |
| 828 | sectors |= (tf->lbal & 0xff); |
| 829 | |
| 830 | return ++sectors; |
| 831 | } |
| 832 | |
| 833 | static u64 ata_tf_to_lba(struct ata_taskfile *tf) |
| 834 | { |
| 835 | u64 sectors = 0; |
| 836 | |
| 837 | sectors |= (tf->device & 0x0f) << 24; |
| 838 | sectors |= (tf->lbah & 0xff) << 16; |
| 839 | sectors |= (tf->lbam & 0xff) << 8; |
| 840 | sectors |= (tf->lbal & 0xff); |
| 841 | |
| 842 | return ++sectors; |
| 843 | } |
| 844 | |
| 845 | /** |
| 846 | * ata_read_native_max_address_ext - LBA48 native max query |
| 847 | * @dev: Device to query |
| 848 | * |
| 849 | * Perform an LBA48 size query upon the device in question. Return the |
| 850 | * actual LBA48 size or zero if the command fails. |
| 851 | */ |
| 852 | |
| 853 | static u64 ata_read_native_max_address_ext(struct ata_device *dev) |
| 854 | { |
| 855 | unsigned int err; |
| 856 | struct ata_taskfile tf; |
| 857 | |
| 858 | ata_tf_init(dev, &tf); |
| 859 | |
| 860 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; |
| 861 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; |
| 862 | tf.protocol |= ATA_PROT_NODATA; |
| 863 | tf.device |= 0x40; |
| 864 | |
| 865 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
| 866 | if (err) |
| 867 | return 0; |
| 868 | |
| 869 | return ata_tf_to_lba48(&tf); |
| 870 | } |
| 871 | |
| 872 | /** |
| 873 | * ata_read_native_max_address - LBA28 native max query |
| 874 | * @dev: Device to query |
| 875 | * |
| 876 | * Performa an LBA28 size query upon the device in question. Return the |
| 877 | * actual LBA28 size or zero if the command fails. |
| 878 | */ |
| 879 | |
| 880 | static u64 ata_read_native_max_address(struct ata_device *dev) |
| 881 | { |
| 882 | unsigned int err; |
| 883 | struct ata_taskfile tf; |
| 884 | |
| 885 | ata_tf_init(dev, &tf); |
| 886 | |
| 887 | tf.command = ATA_CMD_READ_NATIVE_MAX; |
| 888 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
| 889 | tf.protocol |= ATA_PROT_NODATA; |
| 890 | tf.device |= 0x40; |
| 891 | |
| 892 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
| 893 | if (err) |
| 894 | return 0; |
| 895 | |
| 896 | return ata_tf_to_lba(&tf); |
| 897 | } |
| 898 | |
| 899 | /** |
| 900 | * ata_set_native_max_address_ext - LBA48 native max set |
| 901 | * @dev: Device to query |
Randy Dunlap | 6b38d1d | 2007-05-01 17:35:55 -0700 | [diff] [blame] | 902 | * @new_sectors: new max sectors value to set for the device |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 903 | * |
| 904 | * Perform an LBA48 size set max upon the device in question. Return the |
| 905 | * actual LBA48 size or zero if the command fails. |
| 906 | */ |
| 907 | |
| 908 | static u64 ata_set_native_max_address_ext(struct ata_device *dev, u64 new_sectors) |
| 909 | { |
| 910 | unsigned int err; |
| 911 | struct ata_taskfile tf; |
| 912 | |
| 913 | new_sectors--; |
| 914 | |
| 915 | ata_tf_init(dev, &tf); |
| 916 | |
| 917 | tf.command = ATA_CMD_SET_MAX_EXT; |
| 918 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; |
| 919 | tf.protocol |= ATA_PROT_NODATA; |
| 920 | tf.device |= 0x40; |
| 921 | |
| 922 | tf.lbal = (new_sectors >> 0) & 0xff; |
| 923 | tf.lbam = (new_sectors >> 8) & 0xff; |
| 924 | tf.lbah = (new_sectors >> 16) & 0xff; |
| 925 | |
| 926 | tf.hob_lbal = (new_sectors >> 24) & 0xff; |
| 927 | tf.hob_lbam = (new_sectors >> 32) & 0xff; |
| 928 | tf.hob_lbah = (new_sectors >> 40) & 0xff; |
| 929 | |
| 930 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
| 931 | if (err) |
| 932 | return 0; |
| 933 | |
| 934 | return ata_tf_to_lba48(&tf); |
| 935 | } |
| 936 | |
| 937 | /** |
| 938 | * ata_set_native_max_address - LBA28 native max set |
| 939 | * @dev: Device to query |
Randy Dunlap | 6b38d1d | 2007-05-01 17:35:55 -0700 | [diff] [blame] | 940 | * @new_sectors: new max sectors value to set for the device |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 941 | * |
| 942 | * Perform an LBA28 size set max upon the device in question. Return the |
| 943 | * actual LBA28 size or zero if the command fails. |
| 944 | */ |
| 945 | |
| 946 | static u64 ata_set_native_max_address(struct ata_device *dev, u64 new_sectors) |
| 947 | { |
| 948 | unsigned int err; |
| 949 | struct ata_taskfile tf; |
| 950 | |
| 951 | new_sectors--; |
| 952 | |
| 953 | ata_tf_init(dev, &tf); |
| 954 | |
| 955 | tf.command = ATA_CMD_SET_MAX; |
| 956 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
| 957 | tf.protocol |= ATA_PROT_NODATA; |
| 958 | |
| 959 | tf.lbal = (new_sectors >> 0) & 0xff; |
| 960 | tf.lbam = (new_sectors >> 8) & 0xff; |
| 961 | tf.lbah = (new_sectors >> 16) & 0xff; |
| 962 | tf.device |= ((new_sectors >> 24) & 0x0f) | 0x40; |
| 963 | |
| 964 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
| 965 | if (err) |
| 966 | return 0; |
| 967 | |
| 968 | return ata_tf_to_lba(&tf); |
| 969 | } |
| 970 | |
| 971 | /** |
| 972 | * ata_hpa_resize - Resize a device with an HPA set |
| 973 | * @dev: Device to resize |
| 974 | * |
| 975 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize |
| 976 | * it if required to the full size of the media. The caller must check |
| 977 | * the drive has the HPA feature set enabled. |
| 978 | */ |
| 979 | |
| 980 | static u64 ata_hpa_resize(struct ata_device *dev) |
| 981 | { |
| 982 | u64 sectors = dev->n_sectors; |
| 983 | u64 hpa_sectors; |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 984 | |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 985 | if (ata_id_has_lba48(dev->id)) |
| 986 | hpa_sectors = ata_read_native_max_address_ext(dev); |
| 987 | else |
| 988 | hpa_sectors = ata_read_native_max_address(dev); |
| 989 | |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 990 | if (hpa_sectors > sectors) { |
| 991 | ata_dev_printk(dev, KERN_INFO, |
| 992 | "Host Protected Area detected:\n" |
| 993 | "\tcurrent size: %lld sectors\n" |
| 994 | "\tnative size: %lld sectors\n", |
Andrew Morton | bd1d5ec | 2007-04-26 00:19:21 -0700 | [diff] [blame] | 995 | (long long)sectors, (long long)hpa_sectors); |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 996 | |
| 997 | if (ata_ignore_hpa) { |
| 998 | if (ata_id_has_lba48(dev->id)) |
| 999 | hpa_sectors = ata_set_native_max_address_ext(dev, hpa_sectors); |
| 1000 | else |
Andrew Morton | bd1d5ec | 2007-04-26 00:19:21 -0700 | [diff] [blame] | 1001 | hpa_sectors = ata_set_native_max_address(dev, |
| 1002 | hpa_sectors); |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1003 | |
| 1004 | if (hpa_sectors) { |
Andrew Morton | bd1d5ec | 2007-04-26 00:19:21 -0700 | [diff] [blame] | 1005 | ata_dev_printk(dev, KERN_INFO, "native size " |
| 1006 | "increased to %lld sectors\n", |
| 1007 | (long long)hpa_sectors); |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1008 | return hpa_sectors; |
| 1009 | } |
| 1010 | } |
Tejun Heo | 37301a5 | 2007-06-25 20:45:54 +0900 | [diff] [blame] | 1011 | } else if (hpa_sectors < sectors) |
| 1012 | ata_dev_printk(dev, KERN_WARNING, "%s 1: hpa sectors (%lld) " |
| 1013 | "is smaller than sectors (%lld)\n", __FUNCTION__, |
| 1014 | (long long)hpa_sectors, (long long)sectors); |
| 1015 | |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1016 | return sectors; |
| 1017 | } |
| 1018 | |
Tejun Heo | 2940740 | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 1019 | static u64 ata_id_n_sectors(const u16 *id) |
| 1020 | { |
| 1021 | if (ata_id_has_lba(id)) { |
| 1022 | if (ata_id_has_lba48(id)) |
| 1023 | return ata_id_u64(id, 100); |
| 1024 | else |
| 1025 | return ata_id_u32(id, 60); |
| 1026 | } else { |
| 1027 | if (ata_id_current_chs_valid(id)) |
| 1028 | return ata_id_u32(id, 57); |
| 1029 | else |
| 1030 | return id[1] * id[3] * id[6]; |
| 1031 | } |
| 1032 | } |
| 1033 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 1034 | /** |
Alan | 10305f0 | 2007-02-20 18:01:59 +0000 | [diff] [blame] | 1035 | * ata_id_to_dma_mode - Identify DMA mode from id block |
| 1036 | * @dev: device to identify |
Randy Dunlap | cc26126 | 2007-03-16 19:55:47 -0700 | [diff] [blame] | 1037 | * @unknown: mode to assume if we cannot tell |
Alan | 10305f0 | 2007-02-20 18:01:59 +0000 | [diff] [blame] | 1038 | * |
| 1039 | * Set up the timing values for the device based upon the identify |
| 1040 | * reported values for the DMA mode. This function is used by drivers |
| 1041 | * which rely upon firmware configured modes, but wish to report the |
| 1042 | * mode correctly when possible. |
| 1043 | * |
| 1044 | * In addition we emit similarly formatted messages to the default |
| 1045 | * ata_dev_set_mode handler, in order to provide consistency of |
| 1046 | * presentation. |
| 1047 | */ |
| 1048 | |
| 1049 | void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) |
| 1050 | { |
| 1051 | unsigned int mask; |
| 1052 | u8 mode; |
| 1053 | |
| 1054 | /* Pack the DMA modes */ |
| 1055 | mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; |
| 1056 | if (dev->id[53] & 0x04) |
| 1057 | mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; |
| 1058 | |
| 1059 | /* Select the mode in use */ |
| 1060 | mode = ata_xfer_mask2mode(mask); |
| 1061 | |
| 1062 | if (mode != 0) { |
| 1063 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", |
| 1064 | ata_mode_string(mask)); |
| 1065 | } else { |
| 1066 | /* SWDMA perhaps ? */ |
| 1067 | mode = unknown; |
| 1068 | ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); |
| 1069 | } |
| 1070 | |
| 1071 | /* Configure the device reporting */ |
| 1072 | dev->xfer_mode = mode; |
| 1073 | dev->xfer_shift = ata_xfer_mode2shift(mode); |
| 1074 | } |
| 1075 | |
| 1076 | /** |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 1077 | * ata_noop_dev_select - Select device 0/1 on ATA bus |
| 1078 | * @ap: ATA channel to manipulate |
| 1079 | * @device: ATA device (numbered from zero) to select |
| 1080 | * |
| 1081 | * This function performs no actual function. |
| 1082 | * |
| 1083 | * May be used as the dev_select() entry in ata_port_operations. |
| 1084 | * |
| 1085 | * LOCKING: |
| 1086 | * caller. |
| 1087 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
| 1089 | { |
| 1090 | } |
| 1091 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 1092 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | /** |
| 1094 | * ata_std_dev_select - Select device 0/1 on ATA bus |
| 1095 | * @ap: ATA channel to manipulate |
| 1096 | * @device: ATA device (numbered from zero) to select |
| 1097 | * |
| 1098 | * Use the method defined in the ATA specification to |
| 1099 | * make either device 0, or device 1, active on the |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 1100 | * ATA channel. Works with both PIO and MMIO. |
| 1101 | * |
| 1102 | * May be used as the dev_select() entry in ata_port_operations. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | * |
| 1104 | * LOCKING: |
| 1105 | * caller. |
| 1106 | */ |
| 1107 | |
| 1108 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) |
| 1109 | { |
| 1110 | u8 tmp; |
| 1111 | |
| 1112 | if (device == 0) |
| 1113 | tmp = ATA_DEVICE_OBS; |
| 1114 | else |
| 1115 | tmp = ATA_DEVICE_OBS | ATA_DEV1; |
| 1116 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 1117 | iowrite8(tmp, ap->ioaddr.device_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | ata_pause(ap); /* needed; also flushes, for mmio */ |
| 1119 | } |
| 1120 | |
| 1121 | /** |
| 1122 | * ata_dev_select - Select device 0/1 on ATA bus |
| 1123 | * @ap: ATA channel to manipulate |
| 1124 | * @device: ATA device (numbered from zero) to select |
| 1125 | * @wait: non-zero to wait for Status register BSY bit to clear |
| 1126 | * @can_sleep: non-zero if context allows sleeping |
| 1127 | * |
| 1128 | * Use the method defined in the ATA specification to |
| 1129 | * make either device 0, or device 1, active on the |
| 1130 | * ATA channel. |
| 1131 | * |
| 1132 | * This is a high-level version of ata_std_dev_select(), |
| 1133 | * which additionally provides the services of inserting |
| 1134 | * the proper pauses and status polling, where needed. |
| 1135 | * |
| 1136 | * LOCKING: |
| 1137 | * caller. |
| 1138 | */ |
| 1139 | |
| 1140 | void ata_dev_select(struct ata_port *ap, unsigned int device, |
| 1141 | unsigned int wait, unsigned int can_sleep) |
| 1142 | { |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1143 | if (ata_msg_probe(ap)) |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1144 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
| 1145 | "device %u, wait %u\n", device, wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | |
| 1147 | if (wait) |
| 1148 | ata_wait_idle(ap); |
| 1149 | |
| 1150 | ap->ops->dev_select(ap, device); |
| 1151 | |
| 1152 | if (wait) { |
| 1153 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) |
| 1154 | msleep(150); |
| 1155 | ata_wait_idle(ap); |
| 1156 | } |
| 1157 | } |
| 1158 | |
| 1159 | /** |
| 1160 | * ata_dump_id - IDENTIFY DEVICE info debugging output |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1161 | * @id: IDENTIFY DEVICE page to dump |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | * |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1163 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
| 1164 | * page. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | * |
| 1166 | * LOCKING: |
| 1167 | * caller. |
| 1168 | */ |
| 1169 | |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1170 | static inline void ata_dump_id(const u16 *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | { |
| 1172 | DPRINTK("49==0x%04x " |
| 1173 | "53==0x%04x " |
| 1174 | "63==0x%04x " |
| 1175 | "64==0x%04x " |
| 1176 | "75==0x%04x \n", |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1177 | id[49], |
| 1178 | id[53], |
| 1179 | id[63], |
| 1180 | id[64], |
| 1181 | id[75]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | DPRINTK("80==0x%04x " |
| 1183 | "81==0x%04x " |
| 1184 | "82==0x%04x " |
| 1185 | "83==0x%04x " |
| 1186 | "84==0x%04x \n", |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1187 | id[80], |
| 1188 | id[81], |
| 1189 | id[82], |
| 1190 | id[83], |
| 1191 | id[84]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | DPRINTK("88==0x%04x " |
| 1193 | "93==0x%04x\n", |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 1194 | id[88], |
| 1195 | id[93]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | } |
| 1197 | |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1198 | /** |
| 1199 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data |
| 1200 | * @id: IDENTIFY data to compute xfer mask from |
| 1201 | * |
| 1202 | * Compute the xfermask for this device. This is not as trivial |
| 1203 | * as it seems if we must consider early devices correctly. |
| 1204 | * |
| 1205 | * FIXME: pre IDE drive timing (do we care ?). |
| 1206 | * |
| 1207 | * LOCKING: |
| 1208 | * None. |
| 1209 | * |
| 1210 | * RETURNS: |
| 1211 | * Computed xfermask |
| 1212 | */ |
| 1213 | static unsigned int ata_id_xfermask(const u16 *id) |
| 1214 | { |
| 1215 | unsigned int pio_mask, mwdma_mask, udma_mask; |
| 1216 | |
| 1217 | /* Usual case. Word 53 indicates word 64 is valid */ |
| 1218 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { |
| 1219 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; |
| 1220 | pio_mask <<= 3; |
| 1221 | pio_mask |= 0x7; |
| 1222 | } else { |
| 1223 | /* If word 64 isn't valid then Word 51 high byte holds |
| 1224 | * the PIO timing number for the maximum. Turn it into |
| 1225 | * a mask. |
| 1226 | */ |
Lennert Buytenhek | 7a0f1c8 | 2007-01-29 13:28:47 +0100 | [diff] [blame] | 1227 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
Alan Cox | 46767aeb | 2006-09-29 18:26:47 +0100 | [diff] [blame] | 1228 | if (mode < 5) /* Valid PIO range */ |
| 1229 | pio_mask = (2 << mode) - 1; |
| 1230 | else |
| 1231 | pio_mask = 1; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1232 | |
| 1233 | /* But wait.. there's more. Design your standards by |
| 1234 | * committee and you too can get a free iordy field to |
| 1235 | * process. However its the speeds not the modes that |
| 1236 | * are supported... Note drivers using the timing API |
| 1237 | * will get this right anyway |
| 1238 | */ |
| 1239 | } |
| 1240 | |
| 1241 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; |
Tejun Heo | fb21f0d | 2006-03-12 12:34:35 +0900 | [diff] [blame] | 1242 | |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 1243 | if (ata_id_is_cfa(id)) { |
| 1244 | /* |
| 1245 | * Process compact flash extended modes |
| 1246 | */ |
| 1247 | int pio = id[163] & 0x7; |
| 1248 | int dma = (id[163] >> 3) & 7; |
| 1249 | |
| 1250 | if (pio) |
| 1251 | pio_mask |= (1 << 5); |
| 1252 | if (pio > 1) |
| 1253 | pio_mask |= (1 << 6); |
| 1254 | if (dma) |
| 1255 | mwdma_mask |= (1 << 3); |
| 1256 | if (dma > 1) |
| 1257 | mwdma_mask |= (1 << 4); |
| 1258 | } |
| 1259 | |
Tejun Heo | fb21f0d | 2006-03-12 12:34:35 +0900 | [diff] [blame] | 1260 | udma_mask = 0; |
| 1261 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) |
| 1262 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1263 | |
| 1264 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
| 1265 | } |
| 1266 | |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1267 | /** |
| 1268 | * ata_port_queue_task - Queue port_task |
| 1269 | * @ap: The ata_port to queue port_task for |
Randy Dunlap | e2a7f77 | 2006-05-18 10:50:18 -0700 | [diff] [blame] | 1270 | * @fn: workqueue function to be scheduled |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 1271 | * @data: data for @fn to use |
Randy Dunlap | e2a7f77 | 2006-05-18 10:50:18 -0700 | [diff] [blame] | 1272 | * @delay: delay time for workqueue function |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1273 | * |
| 1274 | * Schedule @fn(@data) for execution after @delay jiffies using |
| 1275 | * port_task. There is one port_task per port and it's the |
| 1276 | * user(low level driver)'s responsibility to make sure that only |
| 1277 | * one task is active at any given time. |
| 1278 | * |
| 1279 | * libata core layer takes care of synchronization between |
| 1280 | * port_task and EH. ata_port_queue_task() may be ignored for EH |
| 1281 | * synchronization. |
| 1282 | * |
| 1283 | * LOCKING: |
| 1284 | * Inherited from caller. |
| 1285 | */ |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 1286 | void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1287 | unsigned long delay) |
| 1288 | { |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 1289 | PREPARE_DELAYED_WORK(&ap->port_task, fn); |
| 1290 | ap->port_task_data = data; |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1291 | |
Oleg Nesterov | 45a66c1 | 2007-07-09 11:46:13 -0700 | [diff] [blame] | 1292 | /* may fail if ata_port_flush_task() in progress */ |
| 1293 | queue_delayed_work(ata_wq, &ap->port_task, delay); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1294 | } |
| 1295 | |
| 1296 | /** |
| 1297 | * ata_port_flush_task - Flush port_task |
| 1298 | * @ap: The ata_port to flush port_task for |
| 1299 | * |
| 1300 | * After this function completes, port_task is guranteed not to |
| 1301 | * be running or scheduled. |
| 1302 | * |
| 1303 | * LOCKING: |
| 1304 | * Kernel thread context (may sleep) |
| 1305 | */ |
| 1306 | void ata_port_flush_task(struct ata_port *ap) |
| 1307 | { |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1308 | DPRINTK("ENTER\n"); |
| 1309 | |
Oleg Nesterov | 45a66c1 | 2007-07-09 11:46:13 -0700 | [diff] [blame] | 1310 | cancel_rearming_delayed_work(&ap->port_task); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1311 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1312 | if (ata_msg_ctl(ap)) |
| 1313 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1314 | } |
| 1315 | |
Adrian Bunk | 7102d23 | 2007-01-04 00:09:36 +0100 | [diff] [blame] | 1316 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1317 | { |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1318 | struct completion *waiting = qc->private_data; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1319 | |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1320 | complete(waiting); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1321 | } |
| 1322 | |
| 1323 | /** |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1324 | * ata_exec_internal_sg - execute libata internal command |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1325 | * @dev: Device to which the command is sent |
| 1326 | * @tf: Taskfile registers for the command and the result |
Tejun Heo | d69cf37 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1327 | * @cdb: CDB for packet command |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1328 | * @dma_dir: Data tranfer direction of the command |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1329 | * @sg: sg list for the data buffer of the command |
| 1330 | * @n_elem: Number of sg entries |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1331 | * |
| 1332 | * Executes libata internal command with timeout. @tf contains |
| 1333 | * command on entry and result on return. Timeout and error |
| 1334 | * conditions are reported via return value. No recovery action |
| 1335 | * is taken after a command times out. It's caller's duty to |
| 1336 | * clean up after timeout. |
| 1337 | * |
| 1338 | * LOCKING: |
| 1339 | * None. Should be called with kernel context, might sleep. |
Tejun Heo | 551e888 | 2006-06-12 14:09:49 +0900 | [diff] [blame] | 1340 | * |
| 1341 | * RETURNS: |
| 1342 | * Zero on success, AC_ERR_* mask on failure |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1343 | */ |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1344 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
| 1345 | struct ata_taskfile *tf, const u8 *cdb, |
| 1346 | int dma_dir, struct scatterlist *sg, |
| 1347 | unsigned int n_elem) |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1348 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1349 | struct ata_port *ap = dev->ap; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1350 | u8 command = tf->command; |
| 1351 | struct ata_queued_cmd *qc; |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1352 | unsigned int tag, preempted_tag; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1353 | u32 preempted_sactive, preempted_qc_active; |
Ingo Molnar | 60be6b9 | 2006-07-03 00:25:26 -0700 | [diff] [blame] | 1354 | DECLARE_COMPLETION_ONSTACK(wait); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1355 | unsigned long flags; |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1356 | unsigned int err_mask; |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1357 | int rc; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1358 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1359 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1360 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1361 | /* no internal command while frozen */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1362 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1363 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1364 | return AC_ERR_SYSTEM; |
| 1365 | } |
| 1366 | |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1367 | /* initialize internal qc */ |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1368 | |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1369 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
| 1370 | * drivers choke if any other tag is given. This breaks |
| 1371 | * ata_tag_internal() test for those drivers. Don't use new |
| 1372 | * EH stuff without converting to it. |
| 1373 | */ |
| 1374 | if (ap->ops->error_handler) |
| 1375 | tag = ATA_TAG_INTERNAL; |
| 1376 | else |
| 1377 | tag = 0; |
| 1378 | |
Tejun Heo | 6cec4a3 | 2006-05-15 21:03:41 +0900 | [diff] [blame] | 1379 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1380 | BUG(); |
Tejun Heo | f69499f | 2006-05-15 20:58:03 +0900 | [diff] [blame] | 1381 | qc = __ata_qc_from_tag(ap, tag); |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1382 | |
| 1383 | qc->tag = tag; |
| 1384 | qc->scsicmd = NULL; |
| 1385 | qc->ap = ap; |
| 1386 | qc->dev = dev; |
| 1387 | ata_qc_reinit(qc); |
| 1388 | |
| 1389 | preempted_tag = ap->active_tag; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1390 | preempted_sactive = ap->sactive; |
| 1391 | preempted_qc_active = ap->qc_active; |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1392 | ap->active_tag = ATA_TAG_POISON; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1393 | ap->sactive = 0; |
| 1394 | ap->qc_active = 0; |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1395 | |
| 1396 | /* prepare & issue qc */ |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1397 | qc->tf = *tf; |
Tejun Heo | d69cf37 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1398 | if (cdb) |
| 1399 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); |
Tejun Heo | e61e067 | 2006-05-15 20:57:40 +0900 | [diff] [blame] | 1400 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1401 | qc->dma_dir = dma_dir; |
| 1402 | if (dma_dir != DMA_NONE) { |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1403 | unsigned int i, buflen = 0; |
| 1404 | |
| 1405 | for (i = 0; i < n_elem; i++) |
| 1406 | buflen += sg[i].length; |
| 1407 | |
| 1408 | ata_sg_init(qc, sg, n_elem); |
Brian King | 49c8042 | 2007-01-30 11:32:26 -0600 | [diff] [blame] | 1409 | qc->nbytes = buflen; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1410 | } |
| 1411 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1412 | qc->private_data = &wait; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1413 | qc->complete_fn = ata_qc_complete_internal; |
| 1414 | |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 1415 | ata_qc_issue(qc); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1416 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1417 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1418 | |
Andrew Morton | a8601e5 | 2006-06-25 01:36:52 -0700 | [diff] [blame] | 1419 | rc = wait_for_completion_timeout(&wait, ata_probe_timeout); |
Albert Lee | 41ade50 | 2006-03-14 11:19:04 +0800 | [diff] [blame] | 1420 | |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1421 | ata_port_flush_task(ap); |
| 1422 | |
| 1423 | if (!rc) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1424 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1425 | |
| 1426 | /* We're racing with irq here. If we lose, the |
| 1427 | * following test prevents us from completing the qc |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1428 | * twice. If we win, the port is frozen and will be |
| 1429 | * cleaned up by ->post_internal_cmd(). |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1430 | */ |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1431 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1432 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 1433 | |
| 1434 | if (ap->ops->error_handler) |
| 1435 | ata_port_freeze(ap); |
| 1436 | else |
| 1437 | ata_qc_complete(qc); |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 1438 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1439 | if (ata_msg_warn(ap)) |
| 1440 | ata_dev_printk(dev, KERN_WARNING, |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1441 | "qc timeout (cmd 0x%x)\n", command); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1442 | } |
| 1443 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1444 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1445 | } |
| 1446 | |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1447 | /* do post_internal_cmd */ |
| 1448 | if (ap->ops->post_internal_cmd) |
| 1449 | ap->ops->post_internal_cmd(qc); |
| 1450 | |
Tejun Heo | a51d644 | 2007-03-20 15:24:11 +0900 | [diff] [blame] | 1451 | /* perform minimal error analysis */ |
| 1452 | if (qc->flags & ATA_QCFLAG_FAILED) { |
| 1453 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) |
| 1454 | qc->err_mask |= AC_ERR_DEV; |
| 1455 | |
| 1456 | if (!qc->err_mask) |
| 1457 | qc->err_mask |= AC_ERR_OTHER; |
| 1458 | |
| 1459 | if (qc->err_mask & ~AC_ERR_OTHER) |
| 1460 | qc->err_mask &= ~AC_ERR_OTHER; |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1461 | } |
| 1462 | |
Tejun Heo | 1586930 | 2006-05-15 20:57:33 +0900 | [diff] [blame] | 1463 | /* finish up */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1464 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 1586930 | 2006-05-15 20:57:33 +0900 | [diff] [blame] | 1465 | |
Tejun Heo | e61e067 | 2006-05-15 20:57:40 +0900 | [diff] [blame] | 1466 | *tf = qc->result_tf; |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1467 | err_mask = qc->err_mask; |
| 1468 | |
| 1469 | ata_qc_free(qc); |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1470 | ap->active_tag = preempted_tag; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1471 | ap->sactive = preempted_sactive; |
| 1472 | ap->qc_active = preempted_qc_active; |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1473 | |
Tejun Heo | 1f7dd3e9 | 2006-03-24 15:25:30 +0900 | [diff] [blame] | 1474 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
| 1475 | * Until those drivers are fixed, we detect the condition |
| 1476 | * here, fail the command with AC_ERR_SYSTEM and reenable the |
| 1477 | * port. |
| 1478 | * |
| 1479 | * Note that this doesn't change any behavior as internal |
| 1480 | * command failure results in disabling the device in the |
| 1481 | * higher layer for LLDDs without new reset/EH callbacks. |
| 1482 | * |
| 1483 | * Kill the following code as soon as those drivers are fixed. |
| 1484 | */ |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 1485 | if (ap->flags & ATA_FLAG_DISABLED) { |
Tejun Heo | 1f7dd3e9 | 2006-03-24 15:25:30 +0900 | [diff] [blame] | 1486 | err_mask |= AC_ERR_SYSTEM; |
| 1487 | ata_port_probe(ap); |
| 1488 | } |
| 1489 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1490 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 1586930 | 2006-05-15 20:57:33 +0900 | [diff] [blame] | 1491 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1492 | return err_mask; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1493 | } |
| 1494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | /** |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1496 | * ata_exec_internal - execute libata internal command |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1497 | * @dev: Device to which the command is sent |
| 1498 | * @tf: Taskfile registers for the command and the result |
| 1499 | * @cdb: CDB for packet command |
| 1500 | * @dma_dir: Data tranfer direction of the command |
| 1501 | * @buf: Data buffer of the command |
| 1502 | * @buflen: Length of data buffer |
| 1503 | * |
| 1504 | * Wrapper around ata_exec_internal_sg() which takes simple |
| 1505 | * buffer instead of sg list. |
| 1506 | * |
| 1507 | * LOCKING: |
| 1508 | * None. Should be called with kernel context, might sleep. |
| 1509 | * |
| 1510 | * RETURNS: |
| 1511 | * Zero on success, AC_ERR_* mask on failure |
| 1512 | */ |
| 1513 | unsigned ata_exec_internal(struct ata_device *dev, |
| 1514 | struct ata_taskfile *tf, const u8 *cdb, |
| 1515 | int dma_dir, void *buf, unsigned int buflen) |
| 1516 | { |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1517 | struct scatterlist *psg = NULL, sg; |
| 1518 | unsigned int n_elem = 0; |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1519 | |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1520 | if (dma_dir != DMA_NONE) { |
| 1521 | WARN_ON(!buf); |
| 1522 | sg_init_one(&sg, buf, buflen); |
| 1523 | psg = &sg; |
| 1524 | n_elem++; |
| 1525 | } |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1526 | |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1527 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1528 | } |
| 1529 | |
| 1530 | /** |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1531 | * ata_do_simple_cmd - execute simple internal command |
| 1532 | * @dev: Device to which the command is sent |
| 1533 | * @cmd: Opcode to execute |
| 1534 | * |
| 1535 | * Execute a 'simple' command, that only consists of the opcode |
| 1536 | * 'cmd' itself, without filling any other registers |
| 1537 | * |
| 1538 | * LOCKING: |
| 1539 | * Kernel thread context (may sleep). |
| 1540 | * |
| 1541 | * RETURNS: |
| 1542 | * Zero on success, AC_ERR_* mask on failure |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1543 | */ |
Tejun Heo | 77b08fb | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1544 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1545 | { |
| 1546 | struct ata_taskfile tf; |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1547 | |
| 1548 | ata_tf_init(dev, &tf); |
| 1549 | |
| 1550 | tf.command = cmd; |
| 1551 | tf.flags |= ATA_TFLAG_DEVICE; |
| 1552 | tf.protocol = ATA_PROT_NODATA; |
| 1553 | |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1554 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1555 | } |
| 1556 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | /** |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1558 | * ata_pio_need_iordy - check if iordy needed |
| 1559 | * @adev: ATA device |
| 1560 | * |
| 1561 | * Check if the current speed of the device requires IORDY. Used |
| 1562 | * by various controllers for chip configuration. |
| 1563 | */ |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 1564 | |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1565 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
| 1566 | { |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1567 | /* Controller doesn't support IORDY. Probably a pointless check |
| 1568 | as the caller should know this */ |
| 1569 | if (adev->ap->flags & ATA_FLAG_NO_IORDY) |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1570 | return 0; |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1571 | /* PIO3 and higher it is mandatory */ |
| 1572 | if (adev->pio_mode > XFER_PIO_2) |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1573 | return 1; |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1574 | /* We turn it on when possible */ |
| 1575 | if (ata_id_has_iordy(adev->id)) |
| 1576 | return 1; |
| 1577 | return 0; |
| 1578 | } |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 1579 | |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1580 | /** |
| 1581 | * ata_pio_mask_no_iordy - Return the non IORDY mask |
| 1582 | * @adev: ATA device |
| 1583 | * |
| 1584 | * Compute the highest mode possible if we are not using iordy. Return |
| 1585 | * -1 if no iordy mode is available. |
| 1586 | */ |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 1587 | |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1588 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
| 1589 | { |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1590 | /* 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] | 1591 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1592 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1593 | /* Is the speed faster than the drive allows non IORDY ? */ |
| 1594 | if (pio) { |
| 1595 | /* This is cycle times not frequency - watch the logic! */ |
| 1596 | if (pio > 240) /* PIO2 is 240nS per cycle */ |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1597 | return 3 << ATA_SHIFT_PIO; |
| 1598 | return 7 << ATA_SHIFT_PIO; |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1599 | } |
| 1600 | } |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1601 | return 3 << ATA_SHIFT_PIO; |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1602 | } |
| 1603 | |
| 1604 | /** |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1605 | * ata_dev_read_id - Read ID data from the specified device |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1606 | * @dev: target device |
| 1607 | * @p_class: pointer to class of the target device (may be changed) |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1608 | * @flags: ATA_READID_* flags |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 1609 | * @id: buffer to read IDENTIFY data into |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1610 | * |
| 1611 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
| 1612 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 1613 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
| 1614 | * for pre-ATA4 drives. |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1615 | * |
| 1616 | * LOCKING: |
| 1617 | * Kernel thread context (may sleep) |
| 1618 | * |
| 1619 | * RETURNS: |
| 1620 | * 0 on success, -errno otherwise. |
| 1621 | */ |
Tejun Heo | a9beec9 | 2006-05-31 18:27:44 +0900 | [diff] [blame] | 1622 | 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] | 1623 | unsigned int flags, u16 *id) |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1624 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1625 | struct ata_port *ap = dev->ap; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1626 | unsigned int class = *p_class; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1627 | struct ata_taskfile tf; |
| 1628 | unsigned int err_mask = 0; |
| 1629 | const char *reason; |
Tejun Heo | 54936f8 | 2007-05-11 14:35:29 +0200 | [diff] [blame] | 1630 | int may_fallback = 1, tried_spinup = 0; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1631 | int rc; |
| 1632 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1633 | if (ata_msg_ctl(ap)) |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1634 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1635 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1636 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1637 | retry: |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1638 | ata_tf_init(dev, &tf); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1639 | |
| 1640 | switch (class) { |
| 1641 | case ATA_DEV_ATA: |
| 1642 | tf.command = ATA_CMD_ID_ATA; |
| 1643 | break; |
| 1644 | case ATA_DEV_ATAPI: |
| 1645 | tf.command = ATA_CMD_ID_ATAPI; |
| 1646 | break; |
| 1647 | default: |
| 1648 | rc = -ENODEV; |
| 1649 | reason = "unsupported class"; |
| 1650 | goto err_out; |
| 1651 | } |
| 1652 | |
| 1653 | tf.protocol = ATA_PROT_PIO; |
Tejun Heo | 81afe89 | 2007-02-07 12:37:41 -0800 | [diff] [blame] | 1654 | |
| 1655 | /* Some devices choke if TF registers contain garbage. Make |
| 1656 | * sure those are properly initialized. |
| 1657 | */ |
| 1658 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1659 | |
| 1660 | /* Device presence detection is unreliable on some |
| 1661 | * controllers. Always poll IDENTIFY if available. |
| 1662 | */ |
| 1663 | tf.flags |= ATA_TFLAG_POLLING; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1664 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1665 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1666 | id, sizeof(id[0]) * ATA_ID_WORDS); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1667 | if (err_mask) { |
Tejun Heo | 800b399 | 2006-12-03 21:34:13 +0900 | [diff] [blame] | 1668 | if (err_mask & AC_ERR_NODEV_HINT) { |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1669 | DPRINTK("ata%u.%d: NODEV after polling detection\n", |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1670 | ap->print_id, dev->devno); |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1671 | return -ENOENT; |
| 1672 | } |
| 1673 | |
Tejun Heo | 54936f8 | 2007-05-11 14:35:29 +0200 | [diff] [blame] | 1674 | /* Device or controller might have reported the wrong |
| 1675 | * device class. Give a shot at the other IDENTIFY if |
| 1676 | * the current one is aborted by the device. |
| 1677 | */ |
| 1678 | if (may_fallback && |
| 1679 | (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { |
| 1680 | may_fallback = 0; |
| 1681 | |
| 1682 | if (class == ATA_DEV_ATA) |
| 1683 | class = ATA_DEV_ATAPI; |
| 1684 | else |
| 1685 | class = ATA_DEV_ATA; |
| 1686 | goto retry; |
| 1687 | } |
| 1688 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1689 | rc = -EIO; |
| 1690 | reason = "I/O error"; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1691 | goto err_out; |
| 1692 | } |
| 1693 | |
Tejun Heo | 54936f8 | 2007-05-11 14:35:29 +0200 | [diff] [blame] | 1694 | /* Falling back doesn't make sense if ID data was read |
| 1695 | * successfully at least once. |
| 1696 | */ |
| 1697 | may_fallback = 0; |
| 1698 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1699 | swap_buf_le16(id, ATA_ID_WORDS); |
| 1700 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1701 | /* sanity check */ |
Tejun Heo | a4f5749 | 2006-09-12 20:35:49 -0700 | [diff] [blame] | 1702 | rc = -EINVAL; |
Alan Cox | 6070068 | 2007-06-07 16:13:55 +0100 | [diff] [blame] | 1703 | reason = "device reports invalid type"; |
Tejun Heo | a4f5749 | 2006-09-12 20:35:49 -0700 | [diff] [blame] | 1704 | |
| 1705 | if (class == ATA_DEV_ATA) { |
| 1706 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) |
| 1707 | goto err_out; |
| 1708 | } else { |
| 1709 | if (ata_id_is_ata(id)) |
| 1710 | goto err_out; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1711 | } |
| 1712 | |
Mark Lord | 169439c | 2007-04-17 18:26:07 -0400 | [diff] [blame] | 1713 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
| 1714 | tried_spinup = 1; |
| 1715 | /* |
| 1716 | * Drive powered-up in standby mode, and requires a specific |
| 1717 | * SET_FEATURES spin-up subcommand before it will accept |
| 1718 | * anything other than the original IDENTIFY command. |
| 1719 | */ |
| 1720 | ata_tf_init(dev, &tf); |
| 1721 | tf.command = ATA_CMD_SET_FEATURES; |
| 1722 | tf.feature = SETFEATURES_SPINUP; |
| 1723 | tf.protocol = ATA_PROT_NODATA; |
| 1724 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1725 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
Ryan Power | fb0582f9 | 2007-08-10 13:59:35 -0700 | [diff] [blame] | 1726 | if (err_mask && id[2] != 0x738c) { |
Mark Lord | 169439c | 2007-04-17 18:26:07 -0400 | [diff] [blame] | 1727 | rc = -EIO; |
| 1728 | reason = "SPINUP failed"; |
| 1729 | goto err_out; |
| 1730 | } |
| 1731 | /* |
| 1732 | * If the drive initially returned incomplete IDENTIFY info, |
| 1733 | * we now must reissue the IDENTIFY command. |
| 1734 | */ |
| 1735 | if (id[2] == 0x37c8) |
| 1736 | goto retry; |
| 1737 | } |
| 1738 | |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1739 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1740 | /* |
| 1741 | * The exact sequence expected by certain pre-ATA4 drives is: |
| 1742 | * SRST RESET |
| 1743 | * IDENTIFY |
| 1744 | * INITIALIZE DEVICE PARAMETERS |
| 1745 | * anything else.. |
| 1746 | * Some drives were very specific about that exact sequence. |
| 1747 | */ |
| 1748 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1749 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1750 | if (err_mask) { |
| 1751 | rc = -EIO; |
| 1752 | reason = "INIT_DEV_PARAMS failed"; |
| 1753 | goto err_out; |
| 1754 | } |
| 1755 | |
| 1756 | /* current CHS translation info (id[53-58]) might be |
| 1757 | * changed. reread the identify device info. |
| 1758 | */ |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1759 | flags &= ~ATA_READID_POSTRESET; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1760 | goto retry; |
| 1761 | } |
| 1762 | } |
| 1763 | |
| 1764 | *p_class = class; |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 1765 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1766 | return 0; |
| 1767 | |
| 1768 | err_out: |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1769 | if (ata_msg_warn(ap)) |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1770 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1771 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1772 | return rc; |
| 1773 | } |
| 1774 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1775 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1776 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1777 | return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1778 | } |
| 1779 | |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 1780 | static void ata_dev_config_ncq(struct ata_device *dev, |
| 1781 | char *desc, size_t desc_sz) |
| 1782 | { |
| 1783 | struct ata_port *ap = dev->ap; |
| 1784 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
| 1785 | |
| 1786 | if (!ata_id_has_ncq(dev->id)) { |
| 1787 | desc[0] = '\0'; |
| 1788 | return; |
| 1789 | } |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 1790 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 1791 | snprintf(desc, desc_sz, "NCQ (not used)"); |
| 1792 | return; |
| 1793 | } |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 1794 | if (ap->flags & ATA_FLAG_NCQ) { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 1795 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 1796 | dev->flags |= ATA_DFLAG_NCQ; |
| 1797 | } |
| 1798 | |
| 1799 | if (hdepth >= ddepth) |
| 1800 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); |
| 1801 | else |
| 1802 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); |
| 1803 | } |
| 1804 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1805 | /** |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1806 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1807 | * @dev: Target device to configure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | * |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1809 | * Configure @dev according to @dev->id. Generic and low-level |
| 1810 | * driver specific fixups are also applied. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | * |
| 1812 | * LOCKING: |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1813 | * Kernel thread context (may sleep) |
| 1814 | * |
| 1815 | * RETURNS: |
| 1816 | * 0 on success, -errno otherwise |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | */ |
Tejun Heo | efdaedc | 2006-11-01 18:38:52 +0900 | [diff] [blame] | 1818 | int ata_dev_configure(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1820 | struct ata_port *ap = dev->ap; |
Tejun Heo | 6746544 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 1821 | struct ata_eh_context *ehc = &ap->eh_context; |
| 1822 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1823 | const u16 *id = dev->id; |
Tejun Heo | ff8854b | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1824 | unsigned int xfer_mask; |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 1825 | char revbuf[7]; /* XYZ-99\0 */ |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1826 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
| 1827 | char modelbuf[ATA_ID_PROD_LEN+1]; |
Brian King | e6d902a | 2006-06-28 08:30:31 -0500 | [diff] [blame] | 1828 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1830 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1831 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
| 1832 | __FUNCTION__); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1833 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | } |
| 1835 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1836 | if (ata_msg_probe(ap)) |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1837 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 1839 | /* set horkage */ |
| 1840 | dev->horkage |= ata_dev_blacklisted(dev); |
| 1841 | |
Tejun Heo | 6746544 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 1842 | /* let ACPI work its magic */ |
| 1843 | rc = ata_acpi_on_devcfg(dev); |
| 1844 | if (rc) |
| 1845 | return rc; |
Kristen Carlson Accardi | 08573a8 | 2006-11-10 16:14:47 -0800 | [diff] [blame] | 1846 | |
Tejun Heo | c39f5eb | 2006-03-13 19:51:19 +0900 | [diff] [blame] | 1847 | /* print device capabilities */ |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1848 | if (ata_msg_probe(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1849 | ata_dev_printk(dev, KERN_DEBUG, |
| 1850 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " |
| 1851 | "85:%04x 86:%04x 87:%04x 88:%04x\n", |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1852 | __FUNCTION__, |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 1853 | id[49], id[82], id[83], id[84], |
| 1854 | id[85], id[86], id[87], id[88]); |
Tejun Heo | c39f5eb | 2006-03-13 19:51:19 +0900 | [diff] [blame] | 1855 | |
Tejun Heo | 208a993 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1856 | /* initialize to-be-configured parameters */ |
Tejun Heo | ea1dd4e | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1857 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
Tejun Heo | 208a993 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1858 | dev->max_sectors = 0; |
| 1859 | dev->cdb_len = 0; |
| 1860 | dev->n_sectors = 0; |
| 1861 | dev->cylinders = 0; |
| 1862 | dev->heads = 0; |
| 1863 | dev->sectors = 0; |
| 1864 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | /* |
| 1866 | * common ATA, ATAPI feature tests |
| 1867 | */ |
| 1868 | |
Tejun Heo | ff8854b | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1869 | /* find max transfer mode; for printk only */ |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1870 | xfer_mask = ata_id_xfermask(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1872 | if (ata_msg_probe(ap)) |
| 1873 | ata_dump_id(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | |
Albert Lee | ef143d5 | 2007-06-05 13:01:33 +0800 | [diff] [blame] | 1875 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
| 1876 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, |
| 1877 | sizeof(fwrevbuf)); |
| 1878 | |
| 1879 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, |
| 1880 | sizeof(modelbuf)); |
| 1881 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | /* ATA-specific feature tests */ |
| 1883 | if (dev->class == ATA_DEV_ATA) { |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 1884 | if (ata_id_is_cfa(id)) { |
| 1885 | if (id[162] & 1) /* CPRM may make this media unusable */ |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1886 | ata_dev_printk(dev, KERN_WARNING, |
| 1887 | "supports DRM functions and may " |
| 1888 | "not be fully accessable.\n"); |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 1889 | snprintf(revbuf, 7, "CFA"); |
| 1890 | } |
| 1891 | else |
| 1892 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
| 1893 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1894 | dev->n_sectors = ata_id_n_sectors(id); |
Tejun Heo | 2940740 | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 1895 | |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1896 | if (dev->id[59] & 0x100) |
| 1897 | dev->multi_count = dev->id[59] & 0xff; |
| 1898 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1899 | if (ata_id_has_lba(id)) { |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1900 | const char *lba_desc; |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 1901 | char ncq_desc[20]; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1902 | |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1903 | lba_desc = "LBA"; |
| 1904 | dev->flags |= ATA_DFLAG_LBA; |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1905 | if (ata_id_has_lba48(id)) { |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1906 | dev->flags |= ATA_DFLAG_LBA48; |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1907 | lba_desc = "LBA48"; |
Tejun Heo | 6fc49ad | 2006-11-11 20:10:45 +0900 | [diff] [blame] | 1908 | |
| 1909 | if (dev->n_sectors >= (1UL << 28) && |
| 1910 | ata_id_has_flush_ext(id)) |
| 1911 | dev->flags |= ATA_DFLAG_FLUSH_EXT; |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1912 | } |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1913 | |
Alan Cox | 1e99973 | 2007-04-11 00:23:13 +0100 | [diff] [blame] | 1914 | if (ata_id_hpa_enabled(dev->id)) |
| 1915 | dev->n_sectors = ata_hpa_resize(dev); |
| 1916 | |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 1917 | /* config NCQ */ |
| 1918 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); |
| 1919 | |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1920 | /* print device info to dmesg */ |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1921 | if (ata_msg_drv(ap) && print_info) { |
| 1922 | ata_dev_printk(dev, KERN_INFO, |
| 1923 | "%s: %s, %s, max %s\n", |
| 1924 | revbuf, modelbuf, fwrevbuf, |
| 1925 | ata_mode_string(xfer_mask)); |
| 1926 | ata_dev_printk(dev, KERN_INFO, |
| 1927 | "%Lu sectors, multi %u: %s %s\n", |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 1928 | (unsigned long long)dev->n_sectors, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1929 | dev->multi_count, lba_desc, ncq_desc); |
| 1930 | } |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1931 | } else { |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1932 | /* CHS */ |
| 1933 | |
| 1934 | /* Default translation */ |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1935 | dev->cylinders = id[1]; |
| 1936 | dev->heads = id[3]; |
| 1937 | dev->sectors = id[6]; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1938 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1939 | if (ata_id_current_chs_valid(id)) { |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1940 | /* Current CHS translation is valid. */ |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1941 | dev->cylinders = id[54]; |
| 1942 | dev->heads = id[55]; |
| 1943 | dev->sectors = id[56]; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1944 | } |
| 1945 | |
| 1946 | /* print device info to dmesg */ |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1947 | if (ata_msg_drv(ap) && print_info) { |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1948 | ata_dev_printk(dev, KERN_INFO, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1949 | "%s: %s, %s, max %s\n", |
| 1950 | revbuf, modelbuf, fwrevbuf, |
| 1951 | ata_mode_string(xfer_mask)); |
Jeff Garzik | a84471f | 2007-02-26 05:51:33 -0500 | [diff] [blame] | 1952 | ata_dev_printk(dev, KERN_INFO, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1953 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
| 1954 | (unsigned long long)dev->n_sectors, |
| 1955 | dev->multi_count, dev->cylinders, |
| 1956 | dev->heads, dev->sectors); |
| 1957 | } |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 1958 | } |
| 1959 | |
Tejun Heo | 6e7846e | 2006-02-12 23:32:58 +0900 | [diff] [blame] | 1960 | dev->cdb_len = 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | } |
| 1962 | |
| 1963 | /* ATAPI-specific feature tests */ |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 1964 | else if (dev->class == ATA_DEV_ATAPI) { |
Albert Lee | 08a556d | 2006-03-31 13:29:04 +0800 | [diff] [blame] | 1965 | char *cdb_intr_string = ""; |
| 1966 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1967 | rc = atapi_cdb_len(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1969 | if (ata_msg_warn(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1970 | ata_dev_printk(dev, KERN_WARNING, |
| 1971 | "unsupported CDB len\n"); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1972 | rc = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | goto err_out_nosup; |
| 1974 | } |
Tejun Heo | 6e7846e | 2006-02-12 23:32:58 +0900 | [diff] [blame] | 1975 | dev->cdb_len = (unsigned int) rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | |
Albert Lee | 08a556d | 2006-03-31 13:29:04 +0800 | [diff] [blame] | 1977 | if (ata_id_cdb_intr(dev->id)) { |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 1978 | dev->flags |= ATA_DFLAG_CDB_INTR; |
Albert Lee | 08a556d | 2006-03-31 13:29:04 +0800 | [diff] [blame] | 1979 | cdb_intr_string = ", CDB intr"; |
| 1980 | } |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 1981 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | /* print device info to dmesg */ |
Borislav Petkov | 5afc814 | 2006-06-27 14:51:25 +0200 | [diff] [blame] | 1983 | if (ata_msg_drv(ap) && print_info) |
Albert Lee | ef143d5 | 2007-06-05 13:01:33 +0800 | [diff] [blame] | 1984 | ata_dev_printk(dev, KERN_INFO, |
| 1985 | "ATAPI: %s, %s, max %s%s\n", |
| 1986 | modelbuf, fwrevbuf, |
Tejun Heo | 12436c3 | 2006-05-15 20:59:15 +0900 | [diff] [blame] | 1987 | ata_mode_string(xfer_mask), |
| 1988 | cdb_intr_string); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | } |
| 1990 | |
Tejun Heo | 914ed35 | 2006-11-01 18:39:55 +0900 | [diff] [blame] | 1991 | /* determine max_sectors */ |
| 1992 | dev->max_sectors = ATA_MAX_SECTORS; |
| 1993 | if (dev->flags & ATA_DFLAG_LBA48) |
| 1994 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; |
| 1995 | |
Alan Cox | 9359085 | 2006-09-12 16:55:12 +0100 | [diff] [blame] | 1996 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
| 1997 | /* Let the user know. We don't want to disallow opens for |
| 1998 | rescue purposes, or in case the vendor is just a blithering |
| 1999 | idiot */ |
| 2000 | if (print_info) { |
| 2001 | ata_dev_printk(dev, KERN_WARNING, |
| 2002 | "Drive reports diagnostics failure. This may indicate a drive\n"); |
| 2003 | ata_dev_printk(dev, KERN_WARNING, |
| 2004 | "fault or invalid emulation. Contact drive vendor for information.\n"); |
| 2005 | } |
| 2006 | } |
| 2007 | |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2008 | /* limit bridge transfers to udma5, 200 sectors */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2009 | if (ata_dev_knobble(dev)) { |
Borislav Petkov | 5afc814 | 2006-06-27 14:51:25 +0200 | [diff] [blame] | 2010 | if (ata_msg_drv(ap) && print_info) |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2011 | ata_dev_printk(dev, KERN_INFO, |
| 2012 | "applying bridge limits\n"); |
Tejun Heo | 5a52913 | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 2013 | dev->udma_mask &= ATA_UDMA5; |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2014 | dev->max_sectors = ATA_MAX_SECTORS; |
| 2015 | } |
| 2016 | |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 2017 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
Tejun Heo | 03ec52d | 2007-04-12 13:38:11 +0900 | [diff] [blame] | 2018 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
| 2019 | dev->max_sectors); |
Albert Lee | 18d6e9d | 2007-04-02 11:34:15 +0800 | [diff] [blame] | 2020 | |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2021 | if (ap->ops->dev_config) |
Alan | cd0d3bb | 2007-03-02 00:56:15 +0000 | [diff] [blame] | 2022 | ap->ops->dev_config(dev); |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2023 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2024 | if (ata_msg_probe(ap)) |
| 2025 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", |
| 2026 | __FUNCTION__, ata_chk_status(ap)); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2027 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2028 | |
| 2029 | err_out_nosup: |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 2030 | if (ata_msg_probe(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 2031 | ata_dev_printk(dev, KERN_DEBUG, |
| 2032 | "%s: EXIT, err\n", __FUNCTION__); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2033 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | } |
| 2035 | |
| 2036 | /** |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 2037 | * ata_cable_40wire - return 40 wire cable type |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2038 | * @ap: port |
| 2039 | * |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 2040 | * Helper method for drivers which want to hardwire 40 wire cable |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2041 | * detection. |
| 2042 | */ |
| 2043 | |
| 2044 | int ata_cable_40wire(struct ata_port *ap) |
| 2045 | { |
| 2046 | return ATA_CBL_PATA40; |
| 2047 | } |
| 2048 | |
| 2049 | /** |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 2050 | * ata_cable_80wire - return 80 wire cable type |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2051 | * @ap: port |
| 2052 | * |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 2053 | * Helper method for drivers which want to hardwire 80 wire cable |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2054 | * detection. |
| 2055 | */ |
| 2056 | |
| 2057 | int ata_cable_80wire(struct ata_port *ap) |
| 2058 | { |
| 2059 | return ATA_CBL_PATA80; |
| 2060 | } |
| 2061 | |
| 2062 | /** |
| 2063 | * ata_cable_unknown - return unknown PATA cable. |
| 2064 | * @ap: port |
| 2065 | * |
| 2066 | * Helper method for drivers which have no PATA cable detection. |
| 2067 | */ |
| 2068 | |
| 2069 | int ata_cable_unknown(struct ata_port *ap) |
| 2070 | { |
| 2071 | return ATA_CBL_PATA_UNK; |
| 2072 | } |
| 2073 | |
| 2074 | /** |
| 2075 | * ata_cable_sata - return SATA cable type |
| 2076 | * @ap: port |
| 2077 | * |
| 2078 | * Helper method for drivers which have SATA cables |
| 2079 | */ |
| 2080 | |
| 2081 | int ata_cable_sata(struct ata_port *ap) |
| 2082 | { |
| 2083 | return ATA_CBL_SATA; |
| 2084 | } |
| 2085 | |
| 2086 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2087 | * ata_bus_probe - Reset and probe ATA bus |
| 2088 | * @ap: Bus to probe |
| 2089 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2090 | * Master ATA bus probing function. Initiates a hardware-dependent |
| 2091 | * bus reset, then attempts to identify any devices found on |
| 2092 | * the bus. |
| 2093 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2095 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2096 | * |
| 2097 | * RETURNS: |
Tejun Heo | 96072e6 | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 2098 | * Zero on success, negative errno otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | */ |
| 2100 | |
Brian King | 8028916 | 2006-08-07 14:27:31 -0500 | [diff] [blame] | 2101 | int ata_bus_probe(struct ata_port *ap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | { |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2103 | unsigned int classes[ATA_MAX_DEVICES]; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2104 | int tries[ATA_MAX_DEVICES]; |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2105 | int i, rc; |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2106 | struct ata_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2107 | |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2108 | ata_port_probe(ap); |
| 2109 | |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2110 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 2111 | tries[i] = ATA_PROBE_MAX_TRIES; |
| 2112 | |
| 2113 | retry: |
Tejun Heo | 2044470 | 2006-03-13 01:57:01 +0900 | [diff] [blame] | 2114 | /* reset and determine device classes */ |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 2115 | ap->ops->phy_reset(ap); |
Tejun Heo | 2061a47 | 2006-03-12 00:57:39 +0900 | [diff] [blame] | 2116 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 2117 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 2118 | dev = &ap->device[i]; |
Tejun Heo | c19ba8a | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 2119 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 2120 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
| 2121 | dev->class != ATA_DEV_UNKNOWN) |
| 2122 | classes[dev->devno] = dev->class; |
| 2123 | else |
| 2124 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | 2044470 | 2006-03-13 01:57:01 +0900 | [diff] [blame] | 2125 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 2126 | dev->class = ATA_DEV_UNKNOWN; |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2127 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 2129 | ata_port_probe(ap); |
Tejun Heo | 2044470 | 2006-03-13 01:57:01 +0900 | [diff] [blame] | 2130 | |
Alan Cox | b6079ca | 2006-05-22 16:52:06 +0100 | [diff] [blame] | 2131 | /* after the reset the device state is PIO 0 and the controller |
| 2132 | state is undefined. Record the mode */ |
| 2133 | |
| 2134 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 2135 | ap->device[i].pio_mode = XFER_PIO_0; |
| 2136 | |
Jeff Garzik | f31f0cc | 2007-03-02 17:47:28 -0500 | [diff] [blame] | 2137 | /* read IDENTIFY page and configure devices. We have to do the identify |
| 2138 | specific sequence bass-ackwards so that PDIAG- is released by |
| 2139 | the slave device */ |
| 2140 | |
| 2141 | for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) { |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2142 | dev = &ap->device[i]; |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 2143 | |
Tejun Heo | ec57375 | 2006-04-11 22:26:29 +0900 | [diff] [blame] | 2144 | if (tries[i]) |
| 2145 | dev->class = classes[i]; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2146 | |
Tejun Heo | e1211e3 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2147 | if (!ata_dev_enabled(dev)) |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2148 | continue; |
| 2149 | |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2150 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
| 2151 | dev->id); |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2152 | if (rc) |
| 2153 | goto fail; |
Jeff Garzik | f31f0cc | 2007-03-02 17:47:28 -0500 | [diff] [blame] | 2154 | } |
| 2155 | |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 2156 | /* Now ask for the cable type as PDIAG- should have been released */ |
| 2157 | if (ap->ops->cable_detect) |
| 2158 | ap->cbl = ap->ops->cable_detect(ap); |
| 2159 | |
Jeff Garzik | f31f0cc | 2007-03-02 17:47:28 -0500 | [diff] [blame] | 2160 | /* After the identify sequence we can now set up the devices. We do |
| 2161 | this in the normal order so that the user doesn't get confused */ |
| 2162 | |
| 2163 | for(i = 0; i < ATA_MAX_DEVICES; i++) { |
| 2164 | dev = &ap->device[i]; |
| 2165 | if (!ata_dev_enabled(dev)) |
| 2166 | continue; |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 2167 | |
Tejun Heo | efdaedc | 2006-11-01 18:38:52 +0900 | [diff] [blame] | 2168 | ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; |
| 2169 | rc = ata_dev_configure(dev); |
| 2170 | ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2171 | if (rc) |
| 2172 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | } |
| 2174 | |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2175 | /* configure transfer mode */ |
Tejun Heo | 3adcebb | 2006-05-15 20:57:37 +0900 | [diff] [blame] | 2176 | rc = ata_set_mode(ap, &dev); |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2177 | if (rc) |
Tejun Heo | 51713d3 | 2006-04-11 22:26:29 +0900 | [diff] [blame] | 2178 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2180 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 2181 | if (ata_dev_enabled(&ap->device[i])) |
| 2182 | return 0; |
Alan Cox | e35a9e0 | 2006-03-27 18:46:37 +0100 | [diff] [blame] | 2183 | |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2184 | /* no device present, disable port */ |
| 2185 | ata_port_disable(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | ap->ops->port_disable(ap); |
Tejun Heo | 96072e6 | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 2187 | return -ENODEV; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2188 | |
| 2189 | fail: |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2190 | tries[dev->devno]--; |
| 2191 | |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2192 | switch (rc) { |
| 2193 | case -EINVAL: |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2194 | /* eeek, something went very wrong, give up */ |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2195 | tries[dev->devno] = 0; |
| 2196 | break; |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2197 | |
| 2198 | case -ENODEV: |
| 2199 | /* give it just one more chance */ |
| 2200 | tries[dev->devno] = min(tries[dev->devno], 1); |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2201 | case -EIO: |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2202 | if (tries[dev->devno] == 1) { |
| 2203 | /* This is the last chance, better to slow |
| 2204 | * down than lose it. |
| 2205 | */ |
| 2206 | sata_down_spd_limit(ap); |
| 2207 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
| 2208 | } |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2209 | } |
| 2210 | |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2211 | if (!tries[dev->devno]) |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2212 | ata_dev_disable(dev); |
Tejun Heo | ec57375 | 2006-04-11 22:26:29 +0900 | [diff] [blame] | 2213 | |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2214 | goto retry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | } |
| 2216 | |
| 2217 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2218 | * ata_port_probe - Mark port as enabled |
| 2219 | * @ap: Port for which we indicate enablement |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2221 | * Modify @ap data structure such that the system |
| 2222 | * thinks that the entire port is enabled. |
| 2223 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2224 | * LOCKING: host lock, or some other form of |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2225 | * serialization. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | */ |
| 2227 | |
| 2228 | void ata_port_probe(struct ata_port *ap) |
| 2229 | { |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2230 | ap->flags &= ~ATA_FLAG_DISABLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | } |
| 2232 | |
| 2233 | /** |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2234 | * sata_print_link_status - Print SATA link status |
| 2235 | * @ap: SATA port to printk link status about |
| 2236 | * |
| 2237 | * This function prints link speed and status of a SATA link. |
| 2238 | * |
| 2239 | * LOCKING: |
| 2240 | * None. |
| 2241 | */ |
Jeff Garzik | 43727fb | 2007-02-25 16:50:52 -0500 | [diff] [blame] | 2242 | void sata_print_link_status(struct ata_port *ap) |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2243 | { |
Tejun Heo | 6d5f973 | 2006-04-03 00:09:41 +0900 | [diff] [blame] | 2244 | u32 sstatus, scontrol, tmp; |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2245 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2246 | if (sata_scr_read(ap, SCR_STATUS, &sstatus)) |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2247 | return; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2248 | sata_scr_read(ap, SCR_CONTROL, &scontrol); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2249 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2250 | if (ata_port_online(ap)) { |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2251 | tmp = (sstatus >> 4) & 0xf; |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2252 | ata_port_printk(ap, KERN_INFO, |
| 2253 | "SATA link up %s (SStatus %X SControl %X)\n", |
| 2254 | sata_spd_string(tmp), sstatus, scontrol); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2255 | } else { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2256 | ata_port_printk(ap, KERN_INFO, |
| 2257 | "SATA link down (SStatus %X SControl %X)\n", |
| 2258 | sstatus, scontrol); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2259 | } |
| 2260 | } |
| 2261 | |
| 2262 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2263 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
| 2264 | * @ap: SATA port associated with target SATA PHY. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2266 | * This function issues commands to standard SATA Sxxx |
| 2267 | * PHY registers, to wake up the phy (and device), and |
| 2268 | * clear any reset condition. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | * |
| 2270 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2271 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | * |
| 2273 | */ |
| 2274 | void __sata_phy_reset(struct ata_port *ap) |
| 2275 | { |
| 2276 | u32 sstatus; |
| 2277 | unsigned long timeout = jiffies + (HZ * 5); |
| 2278 | |
| 2279 | if (ap->flags & ATA_FLAG_SATA_RESET) { |
Brett Russ | cdcca89e | 2005-03-28 15:10:27 -0500 | [diff] [blame] | 2280 | /* issue phy wake/reset */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2281 | sata_scr_write_flush(ap, SCR_CONTROL, 0x301); |
Tejun Heo | 62ba284 | 2005-06-26 23:27:19 +0900 | [diff] [blame] | 2282 | /* Couldn't find anything in SATA I/II specs, but |
| 2283 | * AHCI-1.1 10.4.2 says at least 1 ms. */ |
| 2284 | mdelay(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | } |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2286 | /* phy wake/clear reset */ |
| 2287 | sata_scr_write_flush(ap, SCR_CONTROL, 0x300); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2288 | |
| 2289 | /* wait for phy to become ready, if necessary */ |
| 2290 | do { |
| 2291 | msleep(200); |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2292 | sata_scr_read(ap, SCR_STATUS, &sstatus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | if ((sstatus & 0xf) != 1) |
| 2294 | break; |
| 2295 | } while (time_before(jiffies, timeout)); |
| 2296 | |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2297 | /* print link status */ |
| 2298 | sata_print_link_status(ap); |
Jeff Garzik | 656563e | 2005-11-20 03:36:45 -0500 | [diff] [blame] | 2299 | |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2300 | /* TODO: phy layer with polling, timeouts, etc. */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2301 | if (!ata_port_offline(ap)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2302 | ata_port_probe(ap); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2303 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | ata_port_disable(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2305 | |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2306 | if (ap->flags & ATA_FLAG_DISABLED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | return; |
| 2308 | |
| 2309 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { |
| 2310 | ata_port_disable(ap); |
| 2311 | return; |
| 2312 | } |
| 2313 | |
| 2314 | ap->cbl = ATA_CBL_SATA; |
| 2315 | } |
| 2316 | |
| 2317 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2318 | * sata_phy_reset - Reset SATA bus. |
| 2319 | * @ap: SATA port associated with target SATA PHY. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2321 | * This function resets the SATA bus, and then probes |
| 2322 | * the bus for devices. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | * |
| 2324 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2325 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2326 | * |
| 2327 | */ |
| 2328 | void sata_phy_reset(struct ata_port *ap) |
| 2329 | { |
| 2330 | __sata_phy_reset(ap); |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2331 | if (ap->flags & ATA_FLAG_DISABLED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | return; |
| 2333 | ata_bus_reset(ap); |
| 2334 | } |
| 2335 | |
| 2336 | /** |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2337 | * ata_dev_pair - return other device on cable |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2338 | * @adev: device |
| 2339 | * |
| 2340 | * Obtain the other device on the same cable, or if none is |
| 2341 | * present NULL is returned |
| 2342 | */ |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2343 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2344 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2345 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2346 | struct ata_port *ap = adev->ap; |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2347 | struct ata_device *pair = &ap->device[1 - adev->devno]; |
Tejun Heo | e1211e3 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2348 | if (!ata_dev_enabled(pair)) |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2349 | return NULL; |
| 2350 | return pair; |
| 2351 | } |
| 2352 | |
| 2353 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2354 | * ata_port_disable - Disable port. |
| 2355 | * @ap: Port to be disabled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2356 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2357 | * Modify @ap data structure such that the system |
| 2358 | * thinks that the entire port is disabled, and should |
| 2359 | * never attempt to probe or communicate with devices |
| 2360 | * on this port. |
| 2361 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2362 | * LOCKING: host lock, or some other form of |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2363 | * serialization. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | */ |
| 2365 | |
| 2366 | void ata_port_disable(struct ata_port *ap) |
| 2367 | { |
| 2368 | ap->device[0].class = ATA_DEV_NONE; |
| 2369 | ap->device[1].class = ATA_DEV_NONE; |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2370 | ap->flags |= ATA_FLAG_DISABLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2371 | } |
| 2372 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2373 | /** |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2374 | * sata_down_spd_limit - adjust SATA spd limit downward |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2375 | * @ap: Port to adjust SATA spd limit for |
| 2376 | * |
| 2377 | * Adjust SATA spd limit of @ap downward. Note that this |
| 2378 | * function only adjusts the limit. The change must be applied |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2379 | * using sata_set_spd(). |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2380 | * |
| 2381 | * LOCKING: |
| 2382 | * Inherited from caller. |
| 2383 | * |
| 2384 | * RETURNS: |
| 2385 | * 0 on success, negative errno on failure |
| 2386 | */ |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2387 | int sata_down_spd_limit(struct ata_port *ap) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2388 | { |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2389 | u32 sstatus, spd, mask; |
| 2390 | int rc, highbit; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2391 | |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2392 | if (!sata_scr_valid(ap)) |
| 2393 | return -EOPNOTSUPP; |
| 2394 | |
| 2395 | /* If SCR can be read, use it to determine the current SPD. |
| 2396 | * If not, use cached value in ap->sata_spd. |
| 2397 | */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2398 | rc = sata_scr_read(ap, SCR_STATUS, &sstatus); |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2399 | if (rc == 0) |
| 2400 | spd = (sstatus >> 4) & 0xf; |
| 2401 | else |
| 2402 | spd = ap->sata_spd; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2403 | |
| 2404 | mask = ap->sata_spd_limit; |
| 2405 | if (mask <= 1) |
| 2406 | return -EINVAL; |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2407 | |
| 2408 | /* unconditionally mask off the highest bit */ |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2409 | highbit = fls(mask) - 1; |
| 2410 | mask &= ~(1 << highbit); |
| 2411 | |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2412 | /* Mask off all speeds higher than or equal to the current |
| 2413 | * one. Force 1.5Gbps if current SPD is not available. |
| 2414 | */ |
| 2415 | if (spd > 1) |
| 2416 | mask &= (1 << (spd - 1)) - 1; |
| 2417 | else |
| 2418 | mask &= 1; |
| 2419 | |
| 2420 | /* were we already at the bottom? */ |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2421 | if (!mask) |
| 2422 | return -EINVAL; |
| 2423 | |
| 2424 | ap->sata_spd_limit = mask; |
| 2425 | |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2426 | ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", |
| 2427 | sata_spd_string(fls(mask))); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2428 | |
| 2429 | return 0; |
| 2430 | } |
| 2431 | |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2432 | static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2433 | { |
| 2434 | u32 spd, limit; |
| 2435 | |
| 2436 | if (ap->sata_spd_limit == UINT_MAX) |
| 2437 | limit = 0; |
| 2438 | else |
| 2439 | limit = fls(ap->sata_spd_limit); |
| 2440 | |
| 2441 | spd = (*scontrol >> 4) & 0xf; |
| 2442 | *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); |
| 2443 | |
| 2444 | return spd != limit; |
| 2445 | } |
| 2446 | |
| 2447 | /** |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2448 | * sata_set_spd_needed - is SATA spd configuration needed |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2449 | * @ap: Port in question |
| 2450 | * |
| 2451 | * Test whether the spd limit in SControl matches |
| 2452 | * @ap->sata_spd_limit. This function is used to determine |
| 2453 | * whether hardreset is necessary to apply SATA spd |
| 2454 | * configuration. |
| 2455 | * |
| 2456 | * LOCKING: |
| 2457 | * Inherited from caller. |
| 2458 | * |
| 2459 | * RETURNS: |
| 2460 | * 1 if SATA spd configuration is needed, 0 otherwise. |
| 2461 | */ |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2462 | int sata_set_spd_needed(struct ata_port *ap) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2463 | { |
| 2464 | u32 scontrol; |
| 2465 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2466 | if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2467 | return 0; |
| 2468 | |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2469 | return __sata_set_spd_needed(ap, &scontrol); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2470 | } |
| 2471 | |
| 2472 | /** |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2473 | * sata_set_spd - set SATA spd according to spd limit |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2474 | * @ap: Port to set SATA spd for |
| 2475 | * |
| 2476 | * Set SATA spd of @ap according to sata_spd_limit. |
| 2477 | * |
| 2478 | * LOCKING: |
| 2479 | * Inherited from caller. |
| 2480 | * |
| 2481 | * RETURNS: |
| 2482 | * 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] | 2483 | * changed. Negative errno if SCR registers are inaccessible. |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2484 | */ |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2485 | int sata_set_spd(struct ata_port *ap) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2486 | { |
| 2487 | u32 scontrol; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2488 | int rc; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2489 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2490 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
| 2491 | return rc; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2492 | |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2493 | if (!__sata_set_spd_needed(ap, &scontrol)) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2494 | return 0; |
| 2495 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2496 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) |
| 2497 | return rc; |
| 2498 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2499 | return 1; |
| 2500 | } |
| 2501 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2502 | /* |
| 2503 | * This mode timing computation functionality is ported over from |
| 2504 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik |
| 2505 | */ |
| 2506 | /* |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2507 | * 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] | 2508 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2509 | * for UDMA6, which is currently supported only by Maxtor drives. |
| 2510 | * |
| 2511 | * 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] | 2512 | */ |
| 2513 | |
| 2514 | static const struct ata_timing ata_timing[] = { |
| 2515 | |
| 2516 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, |
| 2517 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, |
| 2518 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, |
| 2519 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, |
| 2520 | |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2521 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
| 2522 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2523 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, |
| 2524 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, |
| 2525 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, |
| 2526 | |
| 2527 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2528 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2529 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
| 2530 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, |
| 2531 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2532 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2533 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
| 2534 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, |
| 2535 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, |
| 2536 | |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2537 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, |
| 2538 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2539 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, |
| 2540 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, |
| 2541 | |
| 2542 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, |
| 2543 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, |
| 2544 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, |
| 2545 | |
| 2546 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ |
| 2547 | |
| 2548 | { 0xFF } |
| 2549 | }; |
| 2550 | |
| 2551 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) |
| 2552 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) |
| 2553 | |
| 2554 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) |
| 2555 | { |
| 2556 | q->setup = EZ(t->setup * 1000, T); |
| 2557 | q->act8b = EZ(t->act8b * 1000, T); |
| 2558 | q->rec8b = EZ(t->rec8b * 1000, T); |
| 2559 | q->cyc8b = EZ(t->cyc8b * 1000, T); |
| 2560 | q->active = EZ(t->active * 1000, T); |
| 2561 | q->recover = EZ(t->recover * 1000, T); |
| 2562 | q->cycle = EZ(t->cycle * 1000, T); |
| 2563 | q->udma = EZ(t->udma * 1000, UT); |
| 2564 | } |
| 2565 | |
| 2566 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, |
| 2567 | struct ata_timing *m, unsigned int what) |
| 2568 | { |
| 2569 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); |
| 2570 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); |
| 2571 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); |
| 2572 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); |
| 2573 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); |
| 2574 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); |
| 2575 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); |
| 2576 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); |
| 2577 | } |
| 2578 | |
| 2579 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) |
| 2580 | { |
| 2581 | const struct ata_timing *t; |
| 2582 | |
| 2583 | for (t = ata_timing; t->mode != speed; t++) |
Alan Cox | 9119075 | 2005-10-26 12:17:46 -0400 | [diff] [blame] | 2584 | if (t->mode == 0xFF) |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2585 | return NULL; |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2586 | return t; |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2587 | } |
| 2588 | |
| 2589 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, |
| 2590 | struct ata_timing *t, int T, int UT) |
| 2591 | { |
| 2592 | const struct ata_timing *s; |
| 2593 | struct ata_timing p; |
| 2594 | |
| 2595 | /* |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2596 | * Find the mode. |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 2597 | */ |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2598 | |
| 2599 | if (!(s = ata_timing_find_mode(speed))) |
| 2600 | return -EINVAL; |
| 2601 | |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 2602 | memcpy(t, s, sizeof(*s)); |
| 2603 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2604 | /* |
| 2605 | * If the drive is an EIDE drive, it can tell us it needs extended |
| 2606 | * PIO/MW_DMA cycle timing. |
| 2607 | */ |
| 2608 | |
| 2609 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ |
| 2610 | memset(&p, 0, sizeof(p)); |
| 2611 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
| 2612 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
| 2613 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; |
| 2614 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
| 2615 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
| 2616 | } |
| 2617 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); |
| 2618 | } |
| 2619 | |
| 2620 | /* |
| 2621 | * Convert the timing to bus clock counts. |
| 2622 | */ |
| 2623 | |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 2624 | ata_timing_quantize(t, t, T, UT); |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2625 | |
| 2626 | /* |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 2627 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
| 2628 | * S.M.A.R.T * and some other commands. We have to ensure that the |
| 2629 | * DMA cycle timing is slower/equal than the fastest PIO timing. |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2630 | */ |
| 2631 | |
Alan | fd3367af | 2006-12-07 12:41:18 +0000 | [diff] [blame] | 2632 | if (speed > XFER_PIO_6) { |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2633 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
| 2634 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); |
| 2635 | } |
| 2636 | |
| 2637 | /* |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 2638 | * Lengthen active & recovery time so that cycle time is correct. |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2639 | */ |
| 2640 | |
| 2641 | if (t->act8b + t->rec8b < t->cyc8b) { |
| 2642 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; |
| 2643 | t->rec8b = t->cyc8b - t->act8b; |
| 2644 | } |
| 2645 | |
| 2646 | if (t->active + t->recover < t->cycle) { |
| 2647 | t->active += (t->cycle - (t->active + t->recover)) / 2; |
| 2648 | t->recover = t->cycle - t->active; |
| 2649 | } |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 2650 | |
Alan Cox | 4f701d1 | 2007-04-23 11:55:36 +0100 | [diff] [blame] | 2651 | /* In a few cases quantisation may produce enough errors to |
| 2652 | leave t->cycle too low for the sum of active and recovery |
| 2653 | if so we must correct this */ |
| 2654 | if (t->active + t->recover > t->cycle) |
| 2655 | t->cycle = t->active + t->recover; |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2656 | |
| 2657 | return 0; |
| 2658 | } |
| 2659 | |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2660 | /** |
| 2661 | * ata_down_xfermask_limit - adjust dev xfer masks downward |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2662 | * @dev: Device to adjust xfer masks |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2663 | * @sel: ATA_DNXFER_* selector |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2664 | * |
| 2665 | * Adjust xfer masks of @dev downward. Note that this function |
| 2666 | * does not apply the change. Invoking ata_set_mode() afterwards |
| 2667 | * will apply the limit. |
| 2668 | * |
| 2669 | * LOCKING: |
| 2670 | * Inherited from caller. |
| 2671 | * |
| 2672 | * RETURNS: |
| 2673 | * 0 on success, negative errno on failure |
| 2674 | */ |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2675 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2676 | { |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2677 | char buf[32]; |
| 2678 | unsigned int orig_mask, xfer_mask; |
| 2679 | unsigned int pio_mask, mwdma_mask, udma_mask; |
| 2680 | int quiet, highbit; |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2681 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2682 | quiet = !!(sel & ATA_DNXFER_QUIET); |
| 2683 | sel &= ~ATA_DNXFER_QUIET; |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2684 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2685 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
| 2686 | dev->mwdma_mask, |
| 2687 | dev->udma_mask); |
| 2688 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2689 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2690 | switch (sel) { |
| 2691 | case ATA_DNXFER_PIO: |
| 2692 | highbit = fls(pio_mask) - 1; |
| 2693 | pio_mask &= ~(1 << highbit); |
| 2694 | break; |
| 2695 | |
| 2696 | case ATA_DNXFER_DMA: |
| 2697 | if (udma_mask) { |
| 2698 | highbit = fls(udma_mask) - 1; |
| 2699 | udma_mask &= ~(1 << highbit); |
| 2700 | if (!udma_mask) |
| 2701 | return -ENOENT; |
| 2702 | } else if (mwdma_mask) { |
| 2703 | highbit = fls(mwdma_mask) - 1; |
| 2704 | mwdma_mask &= ~(1 << highbit); |
| 2705 | if (!mwdma_mask) |
| 2706 | return -ENOENT; |
| 2707 | } |
| 2708 | break; |
| 2709 | |
| 2710 | case ATA_DNXFER_40C: |
| 2711 | udma_mask &= ATA_UDMA_MASK_40C; |
| 2712 | break; |
| 2713 | |
| 2714 | case ATA_DNXFER_FORCE_PIO0: |
| 2715 | pio_mask &= 1; |
| 2716 | case ATA_DNXFER_FORCE_PIO: |
| 2717 | mwdma_mask = 0; |
| 2718 | udma_mask = 0; |
| 2719 | break; |
| 2720 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2721 | default: |
| 2722 | BUG(); |
| 2723 | } |
| 2724 | |
| 2725 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
| 2726 | |
| 2727 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) |
| 2728 | return -ENOENT; |
| 2729 | |
| 2730 | if (!quiet) { |
| 2731 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) |
| 2732 | snprintf(buf, sizeof(buf), "%s:%s", |
| 2733 | ata_mode_string(xfer_mask), |
| 2734 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); |
| 2735 | else |
| 2736 | snprintf(buf, sizeof(buf), "%s", |
| 2737 | ata_mode_string(xfer_mask)); |
| 2738 | |
| 2739 | ata_dev_printk(dev, KERN_WARNING, |
| 2740 | "limiting speed to %s\n", buf); |
| 2741 | } |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2742 | |
| 2743 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, |
| 2744 | &dev->udma_mask); |
| 2745 | |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2746 | return 0; |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2747 | } |
| 2748 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2749 | static int ata_dev_set_mode(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2750 | { |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 2751 | struct ata_eh_context *ehc = &dev->ap->eh_context; |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2752 | unsigned int err_mask; |
| 2753 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2754 | |
Tejun Heo | e838460 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 2755 | dev->flags &= ~ATA_DFLAG_PIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2756 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
| 2757 | dev->flags |= ATA_DFLAG_PIO; |
| 2758 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2759 | err_mask = ata_dev_set_xfermode(dev); |
Alan | 11750a4 | 2007-02-05 16:28:30 +0000 | [diff] [blame] | 2760 | /* Old CFA may refuse this command, which is just fine */ |
| 2761 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) |
| 2762 | err_mask &= ~AC_ERR_DEV; |
| 2763 | |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2764 | if (err_mask) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2765 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " |
| 2766 | "(err_mask=0x%x)\n", err_mask); |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2767 | return -EIO; |
| 2768 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2769 | |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 2770 | ehc->i.flags |= ATA_EHI_POST_SETMODE; |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2771 | rc = ata_dev_revalidate(dev, 0); |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 2772 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; |
Tejun Heo | 5eb45c0 | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2773 | if (rc) |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2774 | return rc; |
Tejun Heo | 48a8a14 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 2775 | |
Tejun Heo | 23e71c3 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2776 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
| 2777 | dev->xfer_shift, (int)dev->xfer_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2778 | |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2779 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", |
| 2780 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2781 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2782 | } |
| 2783 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2784 | /** |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 2785 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2786 | * @ap: port on which timings will be programmed |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2787 | * @r_failed_dev: out paramter for failed device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2788 | * |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 2789 | * Standard implementation of the function used to tune and set |
| 2790 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
| 2791 | * ata_dev_set_mode() fails, pointer to the failing device is |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2792 | * returned in @r_failed_dev. |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2793 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2795 | * PCI/etc. bus probe sem. |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2796 | * |
| 2797 | * RETURNS: |
| 2798 | * 0 on success, negative errno otherwise |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | */ |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 2800 | |
| 2801 | int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | { |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2803 | struct ata_device *dev; |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2804 | int i, rc = 0, used_dma = 0, found = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2805 | |
Tejun Heo | 3adcebb | 2006-05-15 20:57:37 +0900 | [diff] [blame] | 2806 | |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2807 | /* step 1: calculate xfer_mask */ |
| 2808 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 2809 | unsigned int pio_mask, dma_mask; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2810 | |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2811 | dev = &ap->device[i]; |
| 2812 | |
Tejun Heo | e1211e3 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2813 | if (!ata_dev_enabled(dev)) |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2814 | continue; |
| 2815 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2816 | ata_dev_xfermask(dev); |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2817 | |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 2818 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
| 2819 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); |
| 2820 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
| 2821 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 2822 | |
Tejun Heo | 4f65977 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2823 | found = 1; |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 2824 | if (dev->dma_mode) |
| 2825 | used_dma = 1; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2826 | } |
Tejun Heo | 4f65977 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2827 | if (!found) |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2828 | goto out; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2829 | |
| 2830 | /* step 2: always set host PIO timings */ |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2831 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 2832 | dev = &ap->device[i]; |
| 2833 | if (!ata_dev_enabled(dev)) |
| 2834 | continue; |
| 2835 | |
| 2836 | if (!dev->pio_mode) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2837 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2838 | rc = -EINVAL; |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2839 | goto out; |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2840 | } |
| 2841 | |
| 2842 | dev->xfer_mode = dev->pio_mode; |
| 2843 | dev->xfer_shift = ATA_SHIFT_PIO; |
| 2844 | if (ap->ops->set_piomode) |
| 2845 | ap->ops->set_piomode(ap, dev); |
| 2846 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2847 | |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2848 | /* step 3: set host DMA timings */ |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2849 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 2850 | dev = &ap->device[i]; |
| 2851 | |
| 2852 | if (!ata_dev_enabled(dev) || !dev->dma_mode) |
| 2853 | continue; |
| 2854 | |
| 2855 | dev->xfer_mode = dev->dma_mode; |
| 2856 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); |
| 2857 | if (ap->ops->set_dmamode) |
| 2858 | ap->ops->set_dmamode(ap, dev); |
| 2859 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2860 | |
| 2861 | /* step 4: update devices' xfer mode */ |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2862 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2863 | dev = &ap->device[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2864 | |
Alan | 18d90de | 2007-01-24 11:42:38 +0000 | [diff] [blame] | 2865 | /* don't update suspended devices' xfer mode */ |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 2866 | if (!ata_dev_enabled(dev)) |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2867 | continue; |
| 2868 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2869 | rc = ata_dev_set_mode(dev); |
Tejun Heo | 5bbc53f | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 2870 | if (rc) |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2871 | goto out; |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2872 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2874 | /* Record simplex status. If we selected DMA then the other |
| 2875 | * host channels are not permitted to do so. |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 2876 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2877 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
Alan | 032af1c | 2007-03-01 17:36:46 +0000 | [diff] [blame] | 2878 | ap->host->simplex_claimed = ap; |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 2879 | |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2880 | out: |
| 2881 | if (rc) |
| 2882 | *r_failed_dev = dev; |
| 2883 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2884 | } |
| 2885 | |
| 2886 | /** |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 2887 | * ata_set_mode - Program timings and issue SET FEATURES - XFER |
| 2888 | * @ap: port on which timings will be programmed |
| 2889 | * @r_failed_dev: out paramter for failed device |
| 2890 | * |
| 2891 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
| 2892 | * ata_set_mode() fails, pointer to the failing device is |
| 2893 | * returned in @r_failed_dev. |
| 2894 | * |
| 2895 | * LOCKING: |
| 2896 | * PCI/etc. bus probe sem. |
| 2897 | * |
| 2898 | * RETURNS: |
| 2899 | * 0 on success, negative errno otherwise |
| 2900 | */ |
| 2901 | int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) |
| 2902 | { |
| 2903 | /* has private set_mode? */ |
| 2904 | if (ap->ops->set_mode) |
| 2905 | return ap->ops->set_mode(ap, r_failed_dev); |
| 2906 | return ata_do_set_mode(ap, r_failed_dev); |
| 2907 | } |
| 2908 | |
| 2909 | /** |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2910 | * ata_tf_to_host - issue ATA taskfile to host controller |
| 2911 | * @ap: port to which command is being issued |
| 2912 | * @tf: ATA taskfile register set |
| 2913 | * |
| 2914 | * Issues ATA taskfile register set to ATA host controller, |
| 2915 | * with proper synchronization with interrupt handler and |
| 2916 | * other threads. |
| 2917 | * |
| 2918 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2919 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2920 | */ |
| 2921 | |
| 2922 | static inline void ata_tf_to_host(struct ata_port *ap, |
| 2923 | const struct ata_taskfile *tf) |
| 2924 | { |
| 2925 | ap->ops->tf_load(ap, tf); |
| 2926 | ap->ops->exec_command(ap, tf); |
| 2927 | } |
| 2928 | |
| 2929 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2930 | * ata_busy_sleep - sleep until BSY clears, or timeout |
| 2931 | * @ap: port containing status register to be polled |
| 2932 | * @tmout_pat: impatience timeout |
| 2933 | * @tmout: overall timeout |
| 2934 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2935 | * Sleep until ATA Status register bit BSY clears, |
| 2936 | * or a timeout occurs. |
| 2937 | * |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2938 | * LOCKING: |
| 2939 | * Kernel thread context (may sleep). |
| 2940 | * |
| 2941 | * RETURNS: |
| 2942 | * 0 on success, -errno otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2943 | */ |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2944 | int ata_busy_sleep(struct ata_port *ap, |
| 2945 | unsigned long tmout_pat, unsigned long tmout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2946 | { |
| 2947 | unsigned long timer_start, timeout; |
| 2948 | u8 status; |
| 2949 | |
| 2950 | status = ata_busy_wait(ap, ATA_BUSY, 300); |
| 2951 | timer_start = jiffies; |
| 2952 | timeout = timer_start + tmout_pat; |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2953 | while (status != 0xff && (status & ATA_BUSY) && |
| 2954 | time_before(jiffies, timeout)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2955 | msleep(50); |
| 2956 | status = ata_busy_wait(ap, ATA_BUSY, 3); |
| 2957 | } |
| 2958 | |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2959 | if (status != 0xff && (status & ATA_BUSY)) |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2960 | ata_port_printk(ap, KERN_WARNING, |
Jeff Garzik | 35aa7a4 | 2006-09-28 06:50:24 -0400 | [diff] [blame] | 2961 | "port is slow to respond, please be patient " |
| 2962 | "(Status 0x%x)\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2963 | |
| 2964 | timeout = timer_start + tmout; |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2965 | while (status != 0xff && (status & ATA_BUSY) && |
| 2966 | time_before(jiffies, timeout)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2967 | msleep(50); |
| 2968 | status = ata_chk_status(ap); |
| 2969 | } |
| 2970 | |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2971 | if (status == 0xff) |
| 2972 | return -ENODEV; |
| 2973 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2974 | if (status & ATA_BUSY) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2975 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
Jeff Garzik | 35aa7a4 | 2006-09-28 06:50:24 -0400 | [diff] [blame] | 2976 | "(%lu secs, Status 0x%x)\n", |
| 2977 | tmout / HZ, status); |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2978 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2979 | } |
| 2980 | |
| 2981 | return 0; |
| 2982 | } |
| 2983 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 2984 | /** |
| 2985 | * ata_wait_ready - sleep until BSY clears, or timeout |
| 2986 | * @ap: port containing status register to be polled |
| 2987 | * @deadline: deadline jiffies for the operation |
| 2988 | * |
| 2989 | * Sleep until ATA Status register bit BSY clears, or timeout |
| 2990 | * occurs. |
| 2991 | * |
| 2992 | * LOCKING: |
| 2993 | * Kernel thread context (may sleep). |
| 2994 | * |
| 2995 | * RETURNS: |
| 2996 | * 0 on success, -errno otherwise. |
| 2997 | */ |
| 2998 | int ata_wait_ready(struct ata_port *ap, unsigned long deadline) |
| 2999 | { |
| 3000 | unsigned long start = jiffies; |
| 3001 | int warned = 0; |
| 3002 | |
| 3003 | while (1) { |
| 3004 | u8 status = ata_chk_status(ap); |
| 3005 | unsigned long now = jiffies; |
| 3006 | |
| 3007 | if (!(status & ATA_BUSY)) |
| 3008 | return 0; |
Tejun Heo | fd7fe70 | 2007-05-23 11:22:15 +0200 | [diff] [blame] | 3009 | if (!ata_port_online(ap) && status == 0xff) |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3010 | return -ENODEV; |
| 3011 | if (time_after(now, deadline)) |
| 3012 | return -EBUSY; |
| 3013 | |
| 3014 | if (!warned && time_after(now, start + 5 * HZ) && |
| 3015 | (deadline - now > 3 * HZ)) { |
| 3016 | ata_port_printk(ap, KERN_WARNING, |
| 3017 | "port is slow to respond, please be patient " |
| 3018 | "(Status 0x%x)\n", status); |
| 3019 | warned = 1; |
| 3020 | } |
| 3021 | |
| 3022 | msleep(50); |
| 3023 | } |
| 3024 | } |
| 3025 | |
| 3026 | static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, |
| 3027 | unsigned long deadline) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3028 | { |
| 3029 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 3030 | unsigned int dev0 = devmask & (1 << 0); |
| 3031 | unsigned int dev1 = devmask & (1 << 1); |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3032 | int rc, ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3033 | |
| 3034 | /* if device 0 was found in ata_devchk, wait for its |
| 3035 | * BSY bit to clear |
| 3036 | */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3037 | if (dev0) { |
| 3038 | rc = ata_wait_ready(ap, deadline); |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3039 | if (rc) { |
| 3040 | if (rc != -ENODEV) |
| 3041 | return rc; |
| 3042 | ret = rc; |
| 3043 | } |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3044 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3045 | |
Tejun Heo | e141d99 | 2007-06-10 14:26:20 +0900 | [diff] [blame] | 3046 | /* if device 1 was found in ata_devchk, wait for register |
| 3047 | * access briefly, then wait for BSY to clear. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3048 | */ |
Tejun Heo | e141d99 | 2007-06-10 14:26:20 +0900 | [diff] [blame] | 3049 | if (dev1) { |
| 3050 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3051 | |
| 3052 | ap->ops->dev_select(ap, 1); |
Tejun Heo | e141d99 | 2007-06-10 14:26:20 +0900 | [diff] [blame] | 3053 | |
| 3054 | /* Wait for register access. Some ATAPI devices fail |
| 3055 | * to set nsect/lbal after reset, so don't waste too |
| 3056 | * much time on it. We're gonna wait for !BSY anyway. |
| 3057 | */ |
| 3058 | for (i = 0; i < 2; i++) { |
| 3059 | u8 nsect, lbal; |
| 3060 | |
| 3061 | nsect = ioread8(ioaddr->nsect_addr); |
| 3062 | lbal = ioread8(ioaddr->lbal_addr); |
| 3063 | if ((nsect == 1) && (lbal == 1)) |
| 3064 | break; |
| 3065 | msleep(50); /* give drive a breather */ |
| 3066 | } |
| 3067 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3068 | rc = ata_wait_ready(ap, deadline); |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3069 | if (rc) { |
| 3070 | if (rc != -ENODEV) |
| 3071 | return rc; |
| 3072 | ret = rc; |
| 3073 | } |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3074 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3075 | |
| 3076 | /* is all this really necessary? */ |
| 3077 | ap->ops->dev_select(ap, 0); |
| 3078 | if (dev1) |
| 3079 | ap->ops->dev_select(ap, 1); |
| 3080 | if (dev0) |
| 3081 | ap->ops->dev_select(ap, 0); |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3082 | |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3083 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3084 | } |
| 3085 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3086 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, |
| 3087 | unsigned long deadline) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3088 | { |
| 3089 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 3090 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 3091 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3092 | |
| 3093 | /* software reset. causes dev0 to be selected */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 3094 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
| 3095 | udelay(20); /* FIXME: flush */ |
| 3096 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); |
| 3097 | udelay(20); /* FIXME: flush */ |
| 3098 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3099 | |
| 3100 | /* spec mandates ">= 2ms" before checking status. |
| 3101 | * We wait 150ms, because that was the magic delay used for |
| 3102 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time |
| 3103 | * between when the ATA command register is written, and then |
| 3104 | * status is checked. Because waiting for "a while" before |
| 3105 | * checking status is fine, post SRST, we perform this magic |
| 3106 | * delay here as well. |
Alan Cox | 09c7ad7 | 2006-03-22 15:52:40 +0000 | [diff] [blame] | 3107 | * |
| 3108 | * Old drivers/ide uses the 2mS rule and then waits for ready |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3109 | */ |
| 3110 | msleep(150); |
| 3111 | |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 3112 | /* Before we perform post reset processing we want to see if |
Tejun Heo | 298a41c | 2006-03-25 02:58:13 +0900 | [diff] [blame] | 3113 | * the bus shows 0xFF because the odd clown forgets the D7 |
| 3114 | * pulldown resistor. |
| 3115 | */ |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 3116 | if (ata_check_status(ap) == 0xFF) |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3117 | return -ENODEV; |
Alan Cox | 09c7ad7 | 2006-03-22 15:52:40 +0000 | [diff] [blame] | 3118 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3119 | return ata_bus_post_reset(ap, devmask, deadline); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3120 | } |
| 3121 | |
| 3122 | /** |
| 3123 | * ata_bus_reset - reset host port and associated ATA channel |
| 3124 | * @ap: port to reset |
| 3125 | * |
| 3126 | * This is typically the first time we actually start issuing |
| 3127 | * commands to the ATA channel. We wait for BSY to clear, then |
| 3128 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its |
| 3129 | * result. Determine what devices, if any, are on the channel |
| 3130 | * by looking at the device 0/1 error register. Look at the signature |
| 3131 | * stored in each device's taskfile registers, to determine if |
| 3132 | * the device is ATA or ATAPI. |
| 3133 | * |
| 3134 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3135 | * PCI/etc. bus probe sem. |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3136 | * Obtains host lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3137 | * |
| 3138 | * SIDE EFFECTS: |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 3139 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3140 | */ |
| 3141 | |
| 3142 | void ata_bus_reset(struct ata_port *ap) |
| 3143 | { |
| 3144 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 3145 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
| 3146 | u8 err; |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 3147 | unsigned int dev0, dev1 = 0, devmask = 0; |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3148 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3149 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 3150 | 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] | 3151 | |
| 3152 | /* determine if device 0/1 are present */ |
| 3153 | if (ap->flags & ATA_FLAG_SATA_RESET) |
| 3154 | dev0 = 1; |
| 3155 | else { |
| 3156 | dev0 = ata_devchk(ap, 0); |
| 3157 | if (slave_possible) |
| 3158 | dev1 = ata_devchk(ap, 1); |
| 3159 | } |
| 3160 | |
| 3161 | if (dev0) |
| 3162 | devmask |= (1 << 0); |
| 3163 | if (dev1) |
| 3164 | devmask |= (1 << 1); |
| 3165 | |
| 3166 | /* select device 0 again */ |
| 3167 | ap->ops->dev_select(ap, 0); |
| 3168 | |
| 3169 | /* issue bus reset */ |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3170 | if (ap->flags & ATA_FLAG_SRST) { |
| 3171 | rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); |
| 3172 | if (rc && rc != -ENODEV) |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 3173 | goto err_out; |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3174 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3175 | |
| 3176 | /* |
| 3177 | * determine by signature whether we have ATA or ATAPI devices |
| 3178 | */ |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3179 | ap->device[0].class = ata_dev_try_classify(ap, 0, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3180 | if ((slave_possible) && (err != 0x81)) |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3181 | ap->device[1].class = ata_dev_try_classify(ap, 1, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3183 | /* is double-select really necessary? */ |
| 3184 | if (ap->device[1].class != ATA_DEV_NONE) |
| 3185 | ap->ops->dev_select(ap, 1); |
| 3186 | if (ap->device[0].class != ATA_DEV_NONE) |
| 3187 | ap->ops->dev_select(ap, 0); |
| 3188 | |
| 3189 | /* if no devices were detected, disable this port */ |
| 3190 | if ((ap->device[0].class == ATA_DEV_NONE) && |
| 3191 | (ap->device[1].class == ATA_DEV_NONE)) |
| 3192 | goto err_out; |
| 3193 | |
| 3194 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { |
| 3195 | /* set up device control for ATA_FLAG_SATA_RESET */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 3196 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3197 | } |
| 3198 | |
| 3199 | DPRINTK("EXIT\n"); |
| 3200 | return; |
| 3201 | |
| 3202 | err_out: |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3203 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3204 | ap->ops->port_disable(ap); |
| 3205 | |
| 3206 | DPRINTK("EXIT\n"); |
| 3207 | } |
| 3208 | |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3209 | /** |
| 3210 | * sata_phy_debounce - debounce SATA phy status |
| 3211 | * @ap: ATA port to debounce SATA phy status for |
| 3212 | * @params: timing parameters { interval, duratinon, timeout } in msec |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3213 | * @deadline: deadline jiffies for the operation |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3214 | * |
| 3215 | * Make sure SStatus of @ap reaches stable state, determined by |
| 3216 | * holding the same value where DET is not 1 for @duration polled |
| 3217 | * every @interval, before @timeout. Timeout constraints the |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3218 | * beginning of the stable state. Because DET gets stuck at 1 on |
| 3219 | * some controllers after hot unplugging, this functions waits |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3220 | * until timeout then returns 0 if DET is stable at 1. |
| 3221 | * |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3222 | * @timeout is further limited by @deadline. The sooner of the |
| 3223 | * two is used. |
| 3224 | * |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3225 | * LOCKING: |
| 3226 | * Kernel thread context (may sleep) |
| 3227 | * |
| 3228 | * RETURNS: |
| 3229 | * 0 on success, -errno on failure. |
| 3230 | */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3231 | int sata_phy_debounce(struct ata_port *ap, const unsigned long *params, |
| 3232 | unsigned long deadline) |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 3233 | { |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3234 | unsigned long interval_msec = params[0]; |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3235 | unsigned long duration = msecs_to_jiffies(params[1]); |
| 3236 | unsigned long last_jiffies, t; |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3237 | u32 last, cur; |
| 3238 | int rc; |
| 3239 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3240 | t = jiffies + msecs_to_jiffies(params[2]); |
| 3241 | if (time_before(t, deadline)) |
| 3242 | deadline = t; |
| 3243 | |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3244 | if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) |
| 3245 | return rc; |
| 3246 | cur &= 0xf; |
| 3247 | |
| 3248 | last = cur; |
| 3249 | last_jiffies = jiffies; |
| 3250 | |
| 3251 | while (1) { |
| 3252 | msleep(interval_msec); |
| 3253 | if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) |
| 3254 | return rc; |
| 3255 | cur &= 0xf; |
| 3256 | |
| 3257 | /* DET stable? */ |
| 3258 | if (cur == last) { |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3259 | if (cur == 1 && time_before(jiffies, deadline)) |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3260 | continue; |
| 3261 | if (time_after(jiffies, last_jiffies + duration)) |
| 3262 | return 0; |
| 3263 | continue; |
| 3264 | } |
| 3265 | |
| 3266 | /* unstable, start over */ |
| 3267 | last = cur; |
| 3268 | last_jiffies = jiffies; |
| 3269 | |
Tejun Heo | f154515 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 3270 | /* Check deadline. If debouncing failed, return |
| 3271 | * -EPIPE to tell upper layer to lower link speed. |
| 3272 | */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3273 | if (time_after(jiffies, deadline)) |
Tejun Heo | f154515 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 3274 | return -EPIPE; |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3275 | } |
| 3276 | } |
| 3277 | |
| 3278 | /** |
| 3279 | * sata_phy_resume - resume SATA phy |
| 3280 | * @ap: ATA port to resume SATA phy for |
| 3281 | * @params: timing parameters { interval, duratinon, timeout } in msec |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3282 | * @deadline: deadline jiffies for the operation |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3283 | * |
| 3284 | * Resume SATA phy of @ap and debounce it. |
| 3285 | * |
| 3286 | * LOCKING: |
| 3287 | * Kernel thread context (may sleep) |
| 3288 | * |
| 3289 | * RETURNS: |
| 3290 | * 0 on success, -errno on failure. |
| 3291 | */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3292 | int sata_phy_resume(struct ata_port *ap, const unsigned long *params, |
| 3293 | unsigned long deadline) |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3294 | { |
| 3295 | u32 scontrol; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3296 | int rc; |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 3297 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3298 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
| 3299 | return rc; |
| 3300 | |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3301 | scontrol = (scontrol & 0x0f0) | 0x300; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3302 | |
| 3303 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) |
| 3304 | return rc; |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 3305 | |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 3306 | /* Some PHYs react badly if SStatus is pounded immediately |
| 3307 | * after resuming. Delay 200ms before debouncing. |
| 3308 | */ |
| 3309 | msleep(200); |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 3310 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3311 | return sata_phy_debounce(ap, params, deadline); |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 3312 | } |
| 3313 | |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3314 | /** |
| 3315 | * ata_std_prereset - prepare for reset |
| 3316 | * @ap: ATA port to be reset |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3317 | * @deadline: deadline jiffies for the operation |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3318 | * |
Tejun Heo | b8cffc6 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3319 | * @ap is about to be reset. Initialize it. Failure from |
| 3320 | * prereset makes libata abort whole reset sequence and give up |
| 3321 | * that port, so prereset should be best-effort. It does its |
| 3322 | * best to prepare for reset sequence but if things go wrong, it |
| 3323 | * should just whine, not fail. |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3324 | * |
| 3325 | * LOCKING: |
| 3326 | * Kernel thread context (may sleep) |
| 3327 | * |
| 3328 | * RETURNS: |
| 3329 | * 0 on success, -errno otherwise. |
| 3330 | */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3331 | int ata_std_prereset(struct ata_port *ap, unsigned long deadline) |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3332 | { |
| 3333 | struct ata_eh_context *ehc = &ap->eh_context; |
Tejun Heo | e9c8391 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 3334 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3335 | int rc; |
| 3336 | |
Tejun Heo | 31daabd | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3337 | /* handle link resume */ |
Tejun Heo | 2832430 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 3338 | if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && |
| 3339 | (ap->flags & ATA_FLAG_HRST_TO_RESUME)) |
| 3340 | ehc->i.action |= ATA_EH_HARDRESET; |
| 3341 | |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3342 | /* if we're about to do hardreset, nothing more to do */ |
| 3343 | if (ehc->i.action & ATA_EH_HARDRESET) |
| 3344 | return 0; |
| 3345 | |
| 3346 | /* if SATA, resume phy */ |
Tejun Heo | a16abc0 | 2007-05-21 18:33:47 +0200 | [diff] [blame] | 3347 | if (ap->flags & ATA_FLAG_SATA) { |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3348 | rc = sata_phy_resume(ap, timing, deadline); |
Tejun Heo | b8cffc6 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3349 | /* whine about phy resume failure but proceed */ |
| 3350 | if (rc && rc != -EOPNOTSUPP) |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3351 | ata_port_printk(ap, KERN_WARNING, "failed to resume " |
| 3352 | "link for reset (errno=%d)\n", rc); |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3353 | } |
| 3354 | |
| 3355 | /* Wait for !BSY if the controller can wait for the first D2H |
| 3356 | * Reg FIS and we don't know that no device is attached. |
| 3357 | */ |
Tejun Heo | b8cffc6 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3358 | if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) { |
| 3359 | rc = ata_wait_ready(ap, deadline); |
Tejun Heo | 6dffaf6 | 2007-05-23 11:58:52 +0200 | [diff] [blame] | 3360 | if (rc && rc != -ENODEV) { |
Tejun Heo | b8cffc6 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3361 | ata_port_printk(ap, KERN_WARNING, "device not ready " |
| 3362 | "(errno=%d), forcing hardreset\n", rc); |
| 3363 | ehc->i.action |= ATA_EH_HARDRESET; |
| 3364 | } |
| 3365 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3366 | |
| 3367 | return 0; |
| 3368 | } |
| 3369 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3370 | /** |
| 3371 | * ata_std_softreset - reset host port via ATA SRST |
| 3372 | * @ap: port to reset |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3373 | * @classes: resulting classes of attached devices |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3374 | * @deadline: deadline jiffies for the operation |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3375 | * |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 3376 | * Reset host port using ATA SRST. |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3377 | * |
| 3378 | * LOCKING: |
| 3379 | * Kernel thread context (may sleep) |
| 3380 | * |
| 3381 | * RETURNS: |
| 3382 | * 0 on success, -errno otherwise. |
| 3383 | */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3384 | int ata_std_softreset(struct ata_port *ap, unsigned int *classes, |
| 3385 | unsigned long deadline) |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3386 | { |
| 3387 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3388 | unsigned int devmask = 0; |
| 3389 | int rc; |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3390 | u8 err; |
| 3391 | |
| 3392 | DPRINTK("ENTER\n"); |
| 3393 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3394 | if (ata_port_offline(ap)) { |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 3395 | classes[0] = ATA_DEV_NONE; |
| 3396 | goto out; |
| 3397 | } |
| 3398 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3399 | /* determine if device 0/1 are present */ |
| 3400 | if (ata_devchk(ap, 0)) |
| 3401 | devmask |= (1 << 0); |
| 3402 | if (slave_possible && ata_devchk(ap, 1)) |
| 3403 | devmask |= (1 << 1); |
| 3404 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3405 | /* select device 0 again */ |
| 3406 | ap->ops->dev_select(ap, 0); |
| 3407 | |
| 3408 | /* issue bus reset */ |
| 3409 | DPRINTK("about to softreset, devmask=%x\n", devmask); |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3410 | rc = ata_bus_softreset(ap, devmask, deadline); |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3411 | /* if link is occupied, -ENODEV too is an error */ |
| 3412 | if (rc && (rc != -ENODEV || sata_scr_valid(ap))) { |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3413 | ata_port_printk(ap, KERN_ERR, "SRST failed (errno=%d)\n", rc); |
| 3414 | return rc; |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3415 | } |
| 3416 | |
| 3417 | /* determine by signature whether we have ATA or ATAPI devices */ |
| 3418 | classes[0] = ata_dev_try_classify(ap, 0, &err); |
| 3419 | if (slave_possible && err != 0x81) |
| 3420 | classes[1] = ata_dev_try_classify(ap, 1, &err); |
| 3421 | |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 3422 | out: |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3423 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
| 3424 | return 0; |
| 3425 | } |
| 3426 | |
| 3427 | /** |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3428 | * sata_port_hardreset - reset port via SATA phy reset |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3429 | * @ap: port to reset |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3430 | * @timing: timing parameters { interval, duratinon, timeout } in msec |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3431 | * @deadline: deadline jiffies for the operation |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3432 | * |
| 3433 | * SATA phy-reset host port using DET bits of SControl register. |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3434 | * |
| 3435 | * LOCKING: |
| 3436 | * Kernel thread context (may sleep) |
| 3437 | * |
| 3438 | * RETURNS: |
| 3439 | * 0 on success, -errno otherwise. |
| 3440 | */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3441 | int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing, |
| 3442 | unsigned long deadline) |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3443 | { |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3444 | u32 scontrol; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3445 | int rc; |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3446 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3447 | DPRINTK("ENTER\n"); |
| 3448 | |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 3449 | if (sata_set_spd_needed(ap)) { |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 3450 | /* SATA spec says nothing about how to reconfigure |
| 3451 | * spd. To be on the safe side, turn off phy during |
| 3452 | * reconfiguration. This works for at least ICH7 AHCI |
| 3453 | * and Sil3124. |
| 3454 | */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3455 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3456 | goto out; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3457 | |
Martin Hicks | a34b6fc | 2006-07-05 15:06:13 -0400 | [diff] [blame] | 3458 | scontrol = (scontrol & 0x0f0) | 0x304; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3459 | |
| 3460 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3461 | goto out; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 3462 | |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 3463 | sata_set_spd(ap); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 3464 | } |
| 3465 | |
| 3466 | /* issue phy wake/reset */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3467 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3468 | goto out; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3469 | |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3470 | scontrol = (scontrol & 0x0f0) | 0x301; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3471 | |
| 3472 | if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3473 | goto out; |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3474 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 3475 | /* 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] | 3476 | * 10.4.2 says at least 1 ms. |
| 3477 | */ |
| 3478 | msleep(1); |
| 3479 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 3480 | /* bring phy back */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3481 | rc = sata_phy_resume(ap, timing, deadline); |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3482 | out: |
| 3483 | DPRINTK("EXIT, rc=%d\n", rc); |
| 3484 | return rc; |
| 3485 | } |
| 3486 | |
| 3487 | /** |
| 3488 | * sata_std_hardreset - reset host port via SATA phy reset |
| 3489 | * @ap: port to reset |
| 3490 | * @class: resulting class of attached device |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3491 | * @deadline: deadline jiffies for the operation |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3492 | * |
| 3493 | * SATA phy-reset host port using DET bits of SControl register, |
| 3494 | * wait for !BSY and classify the attached device. |
| 3495 | * |
| 3496 | * LOCKING: |
| 3497 | * Kernel thread context (may sleep) |
| 3498 | * |
| 3499 | * RETURNS: |
| 3500 | * 0 on success, -errno otherwise. |
| 3501 | */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3502 | int sata_std_hardreset(struct ata_port *ap, unsigned int *class, |
| 3503 | unsigned long deadline) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3504 | { |
| 3505 | const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); |
| 3506 | int rc; |
| 3507 | |
| 3508 | DPRINTK("ENTER\n"); |
| 3509 | |
| 3510 | /* do hardreset */ |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3511 | rc = sata_port_hardreset(ap, timing, deadline); |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3512 | if (rc) { |
| 3513 | ata_port_printk(ap, KERN_ERR, |
| 3514 | "COMRESET failed (errno=%d)\n", rc); |
| 3515 | return rc; |
| 3516 | } |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3517 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3518 | /* TODO: phy layer with polling, timeouts, etc. */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3519 | if (ata_port_offline(ap)) { |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3520 | *class = ATA_DEV_NONE; |
| 3521 | DPRINTK("EXIT, link offline\n"); |
| 3522 | return 0; |
| 3523 | } |
| 3524 | |
Tejun Heo | 34fee22 | 2007-02-02 15:29:27 +0900 | [diff] [blame] | 3525 | /* wait a while before checking status, see SRST for more info */ |
| 3526 | msleep(150); |
| 3527 | |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3528 | rc = ata_wait_ready(ap, deadline); |
Tejun Heo | 9b89391 | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3529 | /* link occupied, -ENODEV too is an error */ |
| 3530 | if (rc) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3531 | ata_port_printk(ap, KERN_ERR, |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 3532 | "COMRESET failed (errno=%d)\n", rc); |
| 3533 | return rc; |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3534 | } |
| 3535 | |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 3536 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
| 3537 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3538 | *class = ata_dev_try_classify(ap, 0, NULL); |
| 3539 | |
| 3540 | DPRINTK("EXIT, class=%u\n", *class); |
| 3541 | return 0; |
| 3542 | } |
| 3543 | |
| 3544 | /** |
| 3545 | * ata_std_postreset - standard postreset callback |
| 3546 | * @ap: the target ata_port |
| 3547 | * @classes: classes of attached devices |
| 3548 | * |
| 3549 | * This function is invoked after a successful reset. Note that |
| 3550 | * the device might have been reset more than once using |
| 3551 | * different reset methods before postreset is invoked. |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3552 | * |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3553 | * LOCKING: |
| 3554 | * Kernel thread context (may sleep) |
| 3555 | */ |
| 3556 | void ata_std_postreset(struct ata_port *ap, unsigned int *classes) |
| 3557 | { |
Tejun Heo | dc2b351 | 2006-05-15 20:58:00 +0900 | [diff] [blame] | 3558 | u32 serror; |
| 3559 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3560 | DPRINTK("ENTER\n"); |
| 3561 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3562 | /* print link status */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3563 | sata_print_link_status(ap); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3564 | |
Tejun Heo | dc2b351 | 2006-05-15 20:58:00 +0900 | [diff] [blame] | 3565 | /* clear SError */ |
| 3566 | if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) |
| 3567 | sata_scr_write(ap, SCR_ERROR, serror); |
| 3568 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3569 | /* is double-select really necessary? */ |
| 3570 | if (classes[0] != ATA_DEV_NONE) |
| 3571 | ap->ops->dev_select(ap, 1); |
| 3572 | if (classes[1] != ATA_DEV_NONE) |
| 3573 | ap->ops->dev_select(ap, 0); |
| 3574 | |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 3575 | /* bail out if no device is present */ |
| 3576 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { |
| 3577 | DPRINTK("EXIT, no device\n"); |
| 3578 | return; |
| 3579 | } |
| 3580 | |
| 3581 | /* set up device control */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 3582 | if (ap->ioaddr.ctl_addr) |
| 3583 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3584 | |
| 3585 | DPRINTK("EXIT\n"); |
| 3586 | } |
| 3587 | |
Tejun Heo | a62c0fc | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3588 | /** |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3589 | * ata_dev_same_device - Determine whether new ID matches configured device |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3590 | * @dev: device to compare against |
| 3591 | * @new_class: class of the new device |
| 3592 | * @new_id: IDENTIFY page of the new device |
| 3593 | * |
| 3594 | * Compare @new_class and @new_id against @dev and determine |
| 3595 | * whether @dev is the device indicated by @new_class and |
| 3596 | * @new_id. |
| 3597 | * |
| 3598 | * LOCKING: |
| 3599 | * None. |
| 3600 | * |
| 3601 | * RETURNS: |
| 3602 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. |
| 3603 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3604 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
| 3605 | const u16 *new_id) |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3606 | { |
| 3607 | const u16 *old_id = dev->id; |
Tejun Heo | a0cf733 | 2007-01-02 20:18:49 +0900 | [diff] [blame] | 3608 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
| 3609 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3610 | |
| 3611 | if (dev->class != new_class) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3612 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
| 3613 | dev->class, new_class); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3614 | return 0; |
| 3615 | } |
| 3616 | |
Tejun Heo | a0cf733 | 2007-01-02 20:18:49 +0900 | [diff] [blame] | 3617 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
| 3618 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); |
| 3619 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); |
| 3620 | 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] | 3621 | |
| 3622 | if (strcmp(model[0], model[1])) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3623 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
| 3624 | "'%s' != '%s'\n", model[0], model[1]); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3625 | return 0; |
| 3626 | } |
| 3627 | |
| 3628 | if (strcmp(serial[0], serial[1])) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3629 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
| 3630 | "'%s' != '%s'\n", serial[0], serial[1]); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3631 | return 0; |
| 3632 | } |
| 3633 | |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3634 | return 1; |
| 3635 | } |
| 3636 | |
| 3637 | /** |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 3638 | * ata_dev_reread_id - Re-read IDENTIFY data |
Henrik Kretzschmar | 3fae450 | 2007-06-19 10:10:50 +0200 | [diff] [blame] | 3639 | * @dev: target ATA device |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3640 | * @readid_flags: read ID flags |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3641 | * |
| 3642 | * Re-read IDENTIFY page and make sure @dev is still attached to |
| 3643 | * the port. |
| 3644 | * |
| 3645 | * LOCKING: |
| 3646 | * Kernel thread context (may sleep) |
| 3647 | * |
| 3648 | * RETURNS: |
| 3649 | * 0 on success, negative errno otherwise |
| 3650 | */ |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 3651 | 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] | 3652 | { |
Tejun Heo | 5eb45c0 | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 3653 | unsigned int class = dev->class; |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3654 | u16 *id = (void *)dev->ap->sector_buf; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3655 | int rc; |
| 3656 | |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 3657 | /* read ID data */ |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3658 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3659 | if (rc) |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 3660 | return rc; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3661 | |
| 3662 | /* is the device still there? */ |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 3663 | if (!ata_dev_same_device(dev, class, id)) |
| 3664 | return -ENODEV; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3665 | |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 3666 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 3667 | return 0; |
| 3668 | } |
| 3669 | |
| 3670 | /** |
| 3671 | * ata_dev_revalidate - Revalidate ATA device |
| 3672 | * @dev: device to revalidate |
| 3673 | * @readid_flags: read ID flags |
| 3674 | * |
| 3675 | * Re-read IDENTIFY page, make sure @dev is still attached to the |
| 3676 | * port and reconfigure it according to the new IDENTIFY page. |
| 3677 | * |
| 3678 | * LOCKING: |
| 3679 | * Kernel thread context (may sleep) |
| 3680 | * |
| 3681 | * RETURNS: |
| 3682 | * 0 on success, negative errno otherwise |
| 3683 | */ |
| 3684 | int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) |
| 3685 | { |
Tejun Heo | 6ddcd3b | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 3686 | u64 n_sectors = dev->n_sectors; |
Tejun Heo | fe30911 | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 3687 | int rc; |
| 3688 | |
| 3689 | if (!ata_dev_enabled(dev)) |
| 3690 | return -ENODEV; |
| 3691 | |
| 3692 | /* re-read ID */ |
| 3693 | rc = ata_dev_reread_id(dev, readid_flags); |
| 3694 | if (rc) |
| 3695 | goto fail; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3696 | |
| 3697 | /* configure device according to the new ID */ |
Tejun Heo | efdaedc | 2006-11-01 18:38:52 +0900 | [diff] [blame] | 3698 | rc = ata_dev_configure(dev); |
Tejun Heo | 6ddcd3b | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 3699 | if (rc) |
| 3700 | goto fail; |
| 3701 | |
| 3702 | /* verify n_sectors hasn't changed */ |
| 3703 | if (dev->class == ATA_DEV_ATA && dev->n_sectors != n_sectors) { |
| 3704 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
| 3705 | "%llu != %llu\n", |
| 3706 | (unsigned long long)n_sectors, |
| 3707 | (unsigned long long)dev->n_sectors); |
Tejun Heo | 8270bec | 2007-08-16 03:02:22 +0900 | [diff] [blame^] | 3708 | |
| 3709 | /* restore original n_sectors */ |
| 3710 | dev->n_sectors = n_sectors; |
| 3711 | |
Tejun Heo | 6ddcd3b | 2007-05-15 03:28:15 +0900 | [diff] [blame] | 3712 | rc = -ENODEV; |
| 3713 | goto fail; |
| 3714 | } |
| 3715 | |
| 3716 | return 0; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3717 | |
| 3718 | fail: |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3719 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3720 | return rc; |
| 3721 | } |
| 3722 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3723 | struct ata_blacklist_entry { |
| 3724 | const char *model_num; |
| 3725 | const char *model_rev; |
| 3726 | unsigned long horkage; |
| 3727 | }; |
| 3728 | |
| 3729 | static const struct ata_blacklist_entry ata_device_blacklist [] = { |
| 3730 | /* Devices with DMA related problems under Linux */ |
| 3731 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, |
| 3732 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, |
| 3733 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, |
| 3734 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, |
| 3735 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, |
| 3736 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, |
| 3737 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, |
| 3738 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, |
| 3739 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, |
| 3740 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, |
| 3741 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, |
| 3742 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, |
| 3743 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, |
| 3744 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, |
| 3745 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, |
| 3746 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, |
| 3747 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, |
| 3748 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, |
| 3749 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, |
| 3750 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, |
| 3751 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, |
| 3752 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, |
| 3753 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, |
| 3754 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, |
| 3755 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, |
| 3756 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3757 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
| 3758 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, |
| 3759 | { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, |
Dave Jones | 39f1988 | 2007-05-21 14:31:03 -0400 | [diff] [blame] | 3760 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
Tejun Heo | 5acd50f | 2007-06-10 14:52:36 +0900 | [diff] [blame] | 3761 | { "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */ |
Tejun Heo | 39ce712 | 2007-07-05 12:31:31 +0900 | [diff] [blame] | 3762 | { "IOMEGA ZIP 250 ATAPI Floppy", |
| 3763 | NULL, ATA_HORKAGE_NODMA }, |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3764 | |
Albert Lee | 18d6e9d | 2007-04-02 11:34:15 +0800 | [diff] [blame] | 3765 | /* Weird ATAPI devices */ |
Tejun Heo | 40a1d53 | 2007-06-27 02:49:38 +0900 | [diff] [blame] | 3766 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
Albert Lee | 18d6e9d | 2007-04-02 11:34:15 +0800 | [diff] [blame] | 3767 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3768 | /* Devices we expect to fail diagnostics */ |
| 3769 | |
| 3770 | /* Devices where NCQ should be avoided */ |
| 3771 | /* NCQ is slow */ |
| 3772 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
Tejun Heo | 09125ea | 2007-02-28 15:21:23 +0900 | [diff] [blame] | 3773 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
| 3774 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, |
Paul Rolland | 7acfaf3 | 2007-03-26 21:43:44 -0800 | [diff] [blame] | 3775 | /* NCQ is broken */ |
| 3776 | { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ }, |
Chuck Ebbert | e8361fc | 2007-07-12 14:37:19 -0400 | [diff] [blame] | 3777 | { "Maxtor 6B200M0", "BANC1BM0", ATA_HORKAGE_NONCQ }, |
Jeff Garzik | 471e44b | 2007-05-28 09:00:05 -0400 | [diff] [blame] | 3778 | { "Maxtor 6B200M0", "BANC1B10", ATA_HORKAGE_NONCQ }, |
Prarit Bhargava | 2f8d90a | 2007-07-10 18:13:28 -0400 | [diff] [blame] | 3779 | { "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI", |
| 3780 | ATA_HORKAGE_NONCQ }, |
Jens Axboe | 9644292 | 2007-03-30 09:27:58 +0200 | [diff] [blame] | 3781 | /* NCQ hard hangs device under heavier load, needs hard power cycle */ |
| 3782 | { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ }, |
Robert Hancock | 36e337d | 2007-04-02 22:05:29 -0600 | [diff] [blame] | 3783 | /* Blacklist entries taken from Silicon Image 3124/3132 |
| 3784 | Windows driver .inf file - also several Linux problem reports */ |
| 3785 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, |
| 3786 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, |
| 3787 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, |
Tejun Heo | bd9c5a3 | 2007-06-08 22:20:59 +0900 | [diff] [blame] | 3788 | /* Drives which do spurious command completion */ |
| 3789 | { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ, }, |
Tejun Heo | 2f8fceb | 2007-06-18 14:38:41 +0900 | [diff] [blame] | 3790 | { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ, }, |
Tejun Heo | e14cbfa | 2007-06-25 11:28:59 +0900 | [diff] [blame] | 3791 | { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, }, |
Tejun Heo | 2f8fceb | 2007-06-18 14:38:41 +0900 | [diff] [blame] | 3792 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
Tejun Heo | a520f26 | 2007-07-10 16:16:18 +0900 | [diff] [blame] | 3793 | { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ, }, |
Tejun Heo | 3fb6589 | 2007-07-20 12:49:38 +0900 | [diff] [blame] | 3794 | { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ, }, |
Tejun Heo | 5d6aca8 | 2007-07-28 16:25:25 +0900 | [diff] [blame] | 3795 | { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ, }, |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3796 | |
| 3797 | /* Devices with NCQ limits */ |
| 3798 | |
| 3799 | /* End Marker */ |
| 3800 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3801 | }; |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 3802 | |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 3803 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3804 | { |
Tejun Heo | 8bfa79f | 2007-01-02 20:19:40 +0900 | [diff] [blame] | 3805 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
| 3806 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3807 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
Albert Lee | 3a77827 | 2006-06-22 13:00:25 +0800 | [diff] [blame] | 3808 | |
Tejun Heo | 8bfa79f | 2007-01-02 20:19:40 +0900 | [diff] [blame] | 3809 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
| 3810 | 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] | 3811 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3812 | while (ad->model_num) { |
Tejun Heo | 8bfa79f | 2007-01-02 20:19:40 +0900 | [diff] [blame] | 3813 | if (!strcmp(ad->model_num, model_num)) { |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3814 | if (ad->model_rev == NULL) |
| 3815 | return ad->horkage; |
Tejun Heo | 8bfa79f | 2007-01-02 20:19:40 +0900 | [diff] [blame] | 3816 | if (!strcmp(ad->model_rev, model_rev)) |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3817 | return ad->horkage; |
Alan Cox | f4b15fe | 2006-03-22 15:54:04 +0000 | [diff] [blame] | 3818 | } |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3819 | ad++; |
Alan Cox | f4b15fe | 2006-03-22 15:54:04 +0000 | [diff] [blame] | 3820 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3821 | return 0; |
| 3822 | } |
| 3823 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3824 | static int ata_dma_blacklisted(const struct ata_device *dev) |
| 3825 | { |
| 3826 | /* We don't support polling DMA. |
| 3827 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) |
| 3828 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. |
| 3829 | */ |
| 3830 | if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && |
| 3831 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
| 3832 | return 1; |
Tejun Heo | 75683fe | 2007-07-05 13:31:27 +0900 | [diff] [blame] | 3833 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3834 | } |
| 3835 | |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3836 | /** |
| 3837 | * ata_dev_xfermask - Compute supported xfermask of the given device |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3838 | * @dev: Device to compute xfermask for |
| 3839 | * |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 3840 | * Compute supported xfermask of @dev and store it in |
| 3841 | * dev->*_mask. This function is responsible for applying all |
| 3842 | * known limits including host controller limits, device |
| 3843 | * blacklist, etc... |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3844 | * |
| 3845 | * LOCKING: |
| 3846 | * None. |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3847 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3848 | static void ata_dev_xfermask(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3849 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3850 | struct ata_port *ap = dev->ap; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3851 | struct ata_host *host = ap->host; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3852 | unsigned long xfer_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3853 | |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 3854 | /* controller modes available */ |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 3855 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
| 3856 | ap->mwdma_mask, ap->udma_mask); |
| 3857 | |
Robert Hancock | 8343f88 | 2007-03-06 02:37:51 -0800 | [diff] [blame] | 3858 | /* drive modes available */ |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 3859 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
| 3860 | dev->mwdma_mask, dev->udma_mask); |
| 3861 | xfer_mask &= ata_id_xfermask(dev->id); |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 3862 | |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 3863 | /* |
| 3864 | * CFA Advanced TrueIDE timings are not allowed on a shared |
| 3865 | * cable |
| 3866 | */ |
| 3867 | if (ata_dev_pair(dev)) { |
| 3868 | /* No PIO5 or PIO6 */ |
| 3869 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); |
| 3870 | /* No MWDMA3 or MWDMA 4 */ |
| 3871 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); |
| 3872 | } |
| 3873 | |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 3874 | if (ata_dma_blacklisted(dev)) { |
| 3875 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3876 | ata_dev_printk(dev, KERN_WARNING, |
| 3877 | "device is on DMA blacklist, disabling DMA\n"); |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 3878 | } |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3879 | |
Petr Vandrovec | 14d66ab | 2007-03-08 10:12:12 +0100 | [diff] [blame] | 3880 | if ((host->flags & ATA_HOST_SIMPLEX) && |
| 3881 | host->simplex_claimed && host->simplex_claimed != ap) { |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 3882 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
| 3883 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " |
| 3884 | "other device, disabling DMA\n"); |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 3885 | } |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 3886 | |
Jeff Garzik | e424675 | 2007-03-09 09:56:46 -0500 | [diff] [blame] | 3887 | if (ap->flags & ATA_FLAG_NO_IORDY) |
| 3888 | xfer_mask &= ata_pio_mask_no_iordy(dev); |
| 3889 | |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 3890 | if (ap->ops->mode_filter) |
Alan Cox | a76b62c | 2007-03-09 09:34:07 -0500 | [diff] [blame] | 3891 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 3892 | |
Robert Hancock | 8343f88 | 2007-03-06 02:37:51 -0800 | [diff] [blame] | 3893 | /* Apply cable rule here. Don't apply it early because when |
| 3894 | * we handle hot plug the cable type can itself change. |
| 3895 | * Check this last so that we know if the transfer rate was |
| 3896 | * solely limited by the cable. |
| 3897 | * Unknown or 80 wire cables reported host side are checked |
| 3898 | * drive side as well. Cases where we know a 40wire cable |
| 3899 | * is used safely for 80 are not checked here. |
| 3900 | */ |
| 3901 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) |
| 3902 | /* UDMA/44 or higher would be available */ |
| 3903 | if((ap->cbl == ATA_CBL_PATA40) || |
| 3904 | (ata_drive_40wire(dev->id) && |
| 3905 | (ap->cbl == ATA_CBL_PATA_UNK || |
| 3906 | ap->cbl == ATA_CBL_PATA80))) { |
| 3907 | ata_dev_printk(dev, KERN_WARNING, |
| 3908 | "limited to UDMA/33 due to 40-wire cable\n"); |
| 3909 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); |
| 3910 | } |
| 3911 | |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 3912 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
| 3913 | &dev->mwdma_mask, &dev->udma_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3914 | } |
| 3915 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3916 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3917 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3918 | * @dev: Device to which command will be sent |
| 3919 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 3920 | * Issue SET FEATURES - XFER MODE command to device @dev |
| 3921 | * on port @ap. |
| 3922 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3923 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3924 | * PCI/etc. bus probe sem. |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3925 | * |
| 3926 | * RETURNS: |
| 3927 | * 0 on success, AC_ERR_* mask otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3928 | */ |
| 3929 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3930 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3931 | { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 3932 | struct ata_taskfile tf; |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3933 | unsigned int err_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3934 | |
| 3935 | /* set up set-features taskfile */ |
| 3936 | DPRINTK("set features - xfer mode\n"); |
| 3937 | |
Tejun Heo | 464cf17 | 2007-05-27 15:10:40 +0200 | [diff] [blame] | 3938 | /* Some controllers and ATAPI devices show flaky interrupt |
| 3939 | * behavior after setting xfer mode. Use polling instead. |
| 3940 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3941 | ata_tf_init(dev, &tf); |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 3942 | tf.command = ATA_CMD_SET_FEATURES; |
| 3943 | tf.feature = SETFEATURES_XFER; |
Tejun Heo | 464cf17 | 2007-05-27 15:10:40 +0200 | [diff] [blame] | 3944 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 3945 | tf.protocol = ATA_PROT_NODATA; |
| 3946 | tf.nsect = dev->xfer_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3947 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3948 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3949 | |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3950 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| 3951 | return err_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3952 | } |
| 3953 | |
| 3954 | /** |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3955 | * ata_dev_init_params - Issue INIT DEV PARAMS command |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3956 | * @dev: Device to which command will be sent |
Randy Dunlap | e2a7f77 | 2006-05-18 10:50:18 -0700 | [diff] [blame] | 3957 | * @heads: Number of heads (taskfile parameter) |
| 3958 | * @sectors: Number of sectors (taskfile parameter) |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3959 | * |
| 3960 | * LOCKING: |
Tejun Heo | 6aff8f1 | 2006-02-15 18:24:09 +0900 | [diff] [blame] | 3961 | * Kernel thread context (may sleep) |
| 3962 | * |
| 3963 | * RETURNS: |
| 3964 | * 0 on success, AC_ERR_* mask otherwise. |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3965 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3966 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
| 3967 | u16 heads, u16 sectors) |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3968 | { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 3969 | struct ata_taskfile tf; |
Tejun Heo | 6aff8f1 | 2006-02-15 18:24:09 +0900 | [diff] [blame] | 3970 | unsigned int err_mask; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3971 | |
| 3972 | /* Number of sectors per track 1-255. Number of heads 1-16 */ |
| 3973 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) |
Albert Lee | 00b6f5e | 2006-03-27 16:39:18 +0800 | [diff] [blame] | 3974 | return AC_ERR_INVALID; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3975 | |
| 3976 | /* set up init dev params taskfile */ |
| 3977 | DPRINTK("init dev params \n"); |
| 3978 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3979 | ata_tf_init(dev, &tf); |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 3980 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
| 3981 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 3982 | tf.protocol = ATA_PROT_NODATA; |
| 3983 | tf.nsect = sectors; |
| 3984 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3985 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3986 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3987 | |
Tejun Heo | 6aff8f1 | 2006-02-15 18:24:09 +0900 | [diff] [blame] | 3988 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| 3989 | return err_mask; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3990 | } |
| 3991 | |
| 3992 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3993 | * ata_sg_clean - Unmap DMA memory associated with command |
| 3994 | * @qc: Command containing DMA memory to be released |
| 3995 | * |
| 3996 | * Unmap all mapped DMA memory associated with this command. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3997 | * |
| 3998 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3999 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4000 | */ |
Tejun Heo | 70e6ad0 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 4001 | void ata_sg_clean(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4002 | { |
| 4003 | struct ata_port *ap = qc->ap; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4004 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4005 | int dir = qc->dma_dir; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4006 | void *pad_buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4007 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 4008 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
| 4009 | WARN_ON(sg == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4010 | |
| 4011 | if (qc->flags & ATA_QCFLAG_SINGLE) |
Jeff Garzik | f131883 | 2006-02-20 16:55:56 -0500 | [diff] [blame] | 4012 | WARN_ON(qc->n_elem > 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4013 | |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 4014 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4015 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4016 | /* if we padded the buffer out to 32-bit bound, and data |
| 4017 | * xfer direction is from-device, we must copy from the |
| 4018 | * pad buffer back into the supplied buffer |
| 4019 | */ |
| 4020 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) |
| 4021 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); |
| 4022 | |
| 4023 | if (qc->flags & ATA_QCFLAG_SG) { |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 4024 | if (qc->n_elem) |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 4025 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4026 | /* restore last sg */ |
| 4027 | sg[qc->orig_n_elem - 1].length += qc->pad_len; |
| 4028 | if (pad_buf) { |
| 4029 | struct scatterlist *psg = &qc->pad_sgent; |
| 4030 | void *addr = kmap_atomic(psg->page, KM_IRQ0); |
| 4031 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); |
Mark Lord | dfa1598 | 2005-12-12 23:19:28 -0500 | [diff] [blame] | 4032 | kunmap_atomic(addr, KM_IRQ0); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4033 | } |
| 4034 | } else { |
Tejun Heo | 2e242fa | 2006-02-20 23:48:38 +0900 | [diff] [blame] | 4035 | if (qc->n_elem) |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 4036 | dma_unmap_single(ap->dev, |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 4037 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
| 4038 | dir); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4039 | /* restore sg */ |
| 4040 | sg->length += qc->pad_len; |
| 4041 | if (pad_buf) |
| 4042 | memcpy(qc->buf_virt + sg->length - qc->pad_len, |
| 4043 | pad_buf, qc->pad_len); |
| 4044 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4045 | |
| 4046 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4047 | qc->__sg = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4048 | } |
| 4049 | |
| 4050 | /** |
| 4051 | * ata_fill_sg - Fill PCI IDE PRD table |
| 4052 | * @qc: Metadata associated with taskfile to be transferred |
| 4053 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 4054 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 4055 | * associated with the current disk command. |
| 4056 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4057 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4058 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4059 | * |
| 4060 | */ |
| 4061 | static void ata_fill_sg(struct ata_queued_cmd *qc) |
| 4062 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4063 | struct ata_port *ap = qc->ap; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4064 | struct scatterlist *sg; |
| 4065 | unsigned int idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4066 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 4067 | WARN_ON(qc->__sg == NULL); |
Jeff Garzik | f131883 | 2006-02-20 16:55:56 -0500 | [diff] [blame] | 4068 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4069 | |
| 4070 | idx = 0; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4071 | ata_for_each_sg(sg, qc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4072 | u32 addr, offset; |
| 4073 | u32 sg_len, len; |
| 4074 | |
| 4075 | /* determine if physical DMA addr spans 64K boundary. |
| 4076 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 4077 | * truncate dma_addr_t to u32. |
| 4078 | */ |
| 4079 | addr = (u32) sg_dma_address(sg); |
| 4080 | sg_len = sg_dma_len(sg); |
| 4081 | |
| 4082 | while (sg_len) { |
| 4083 | offset = addr & 0xffff; |
| 4084 | len = sg_len; |
| 4085 | if ((offset + sg_len) > 0x10000) |
| 4086 | len = 0x10000 - offset; |
| 4087 | |
| 4088 | ap->prd[idx].addr = cpu_to_le32(addr); |
| 4089 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); |
| 4090 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); |
| 4091 | |
| 4092 | idx++; |
| 4093 | sg_len -= len; |
| 4094 | addr += len; |
| 4095 | } |
| 4096 | } |
| 4097 | |
| 4098 | if (idx) |
| 4099 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
| 4100 | } |
Tejun Heo | b9a4197 | 2007-06-27 02:48:43 +0900 | [diff] [blame] | 4101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4102 | /** |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4103 | * ata_fill_sg_dumb - Fill PCI IDE PRD table |
| 4104 | * @qc: Metadata associated with taskfile to be transferred |
| 4105 | * |
| 4106 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 4107 | * associated with the current disk command. Perform the fill |
| 4108 | * so that we avoid writing any length 64K records for |
| 4109 | * controllers that don't follow the spec. |
| 4110 | * |
| 4111 | * LOCKING: |
| 4112 | * spin_lock_irqsave(host lock) |
| 4113 | * |
| 4114 | */ |
| 4115 | static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) |
| 4116 | { |
| 4117 | struct ata_port *ap = qc->ap; |
| 4118 | struct scatterlist *sg; |
| 4119 | unsigned int idx; |
| 4120 | |
| 4121 | WARN_ON(qc->__sg == NULL); |
| 4122 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
| 4123 | |
| 4124 | idx = 0; |
| 4125 | ata_for_each_sg(sg, qc) { |
| 4126 | u32 addr, offset; |
| 4127 | u32 sg_len, len, blen; |
| 4128 | |
| 4129 | /* determine if physical DMA addr spans 64K boundary. |
| 4130 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 4131 | * truncate dma_addr_t to u32. |
| 4132 | */ |
| 4133 | addr = (u32) sg_dma_address(sg); |
| 4134 | sg_len = sg_dma_len(sg); |
| 4135 | |
| 4136 | while (sg_len) { |
| 4137 | offset = addr & 0xffff; |
| 4138 | len = sg_len; |
| 4139 | if ((offset + sg_len) > 0x10000) |
| 4140 | len = 0x10000 - offset; |
| 4141 | |
| 4142 | blen = len & 0xffff; |
| 4143 | ap->prd[idx].addr = cpu_to_le32(addr); |
| 4144 | if (blen == 0) { |
| 4145 | /* Some PATA chipsets like the CS5530 can't |
| 4146 | cope with 0x0000 meaning 64K as the spec says */ |
| 4147 | ap->prd[idx].flags_len = cpu_to_le32(0x8000); |
| 4148 | blen = 0x8000; |
| 4149 | ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000); |
| 4150 | } |
| 4151 | ap->prd[idx].flags_len = cpu_to_le32(blen); |
| 4152 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); |
| 4153 | |
| 4154 | idx++; |
| 4155 | sg_len -= len; |
| 4156 | addr += len; |
| 4157 | } |
| 4158 | } |
| 4159 | |
| 4160 | if (idx) |
| 4161 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
| 4162 | } |
| 4163 | |
| 4164 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4165 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported |
| 4166 | * @qc: Metadata associated with taskfile to check |
| 4167 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 4168 | * Allow low-level driver to filter ATA PACKET commands, returning |
| 4169 | * a status indicating whether or not it is OK to use DMA for the |
| 4170 | * supplied PACKET command. |
| 4171 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4172 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4173 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4174 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4175 | * RETURNS: 0 when ATAPI DMA can be used |
| 4176 | * nonzero otherwise |
| 4177 | */ |
| 4178 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) |
| 4179 | { |
| 4180 | struct ata_port *ap = qc->ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4181 | |
Tejun Heo | b9a4197 | 2007-06-27 02:48:43 +0900 | [diff] [blame] | 4182 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a |
| 4183 | * few ATAPI devices choke on such DMA requests. |
| 4184 | */ |
| 4185 | if (unlikely(qc->nbytes & 15)) |
| 4186 | return 1; |
Albert Lee | 6f23a31 | 2007-04-02 11:39:25 +0800 | [diff] [blame] | 4187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4188 | if (ap->ops->check_atapi_dma) |
Tejun Heo | b9a4197 | 2007-06-27 02:48:43 +0900 | [diff] [blame] | 4189 | return ap->ops->check_atapi_dma(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4190 | |
Tejun Heo | b9a4197 | 2007-06-27 02:48:43 +0900 | [diff] [blame] | 4191 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4192 | } |
Tejun Heo | b9a4197 | 2007-06-27 02:48:43 +0900 | [diff] [blame] | 4193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4194 | /** |
| 4195 | * ata_qc_prep - Prepare taskfile for submission |
| 4196 | * @qc: Metadata associated with taskfile to be prepared |
| 4197 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 4198 | * Prepare ATA taskfile for submission. |
| 4199 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4200 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4201 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4202 | */ |
| 4203 | void ata_qc_prep(struct ata_queued_cmd *qc) |
| 4204 | { |
| 4205 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 4206 | return; |
| 4207 | |
| 4208 | ata_fill_sg(qc); |
| 4209 | } |
| 4210 | |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 4211 | /** |
| 4212 | * ata_dumb_qc_prep - Prepare taskfile for submission |
| 4213 | * @qc: Metadata associated with taskfile to be prepared |
| 4214 | * |
| 4215 | * Prepare ATA taskfile for submission. |
| 4216 | * |
| 4217 | * LOCKING: |
| 4218 | * spin_lock_irqsave(host lock) |
| 4219 | */ |
| 4220 | void ata_dumb_qc_prep(struct ata_queued_cmd *qc) |
| 4221 | { |
| 4222 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 4223 | return; |
| 4224 | |
| 4225 | ata_fill_sg_dumb(qc); |
| 4226 | } |
| 4227 | |
Brian King | e46834c | 2006-03-17 17:04:03 -0600 | [diff] [blame] | 4228 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
| 4229 | |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4230 | /** |
| 4231 | * ata_sg_init_one - Associate command with memory buffer |
| 4232 | * @qc: Command to be associated |
| 4233 | * @buf: Memory buffer |
| 4234 | * @buflen: Length of memory buffer, in bytes. |
| 4235 | * |
| 4236 | * Initialize the data-related elements of queued_cmd @qc |
| 4237 | * to point to a single memory buffer, @buf of byte length @buflen. |
| 4238 | * |
| 4239 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4240 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4241 | */ |
| 4242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4243 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
| 4244 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4245 | qc->flags |= ATA_QCFLAG_SINGLE; |
| 4246 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4247 | qc->__sg = &qc->sgent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4248 | qc->n_elem = 1; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4249 | qc->orig_n_elem = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4250 | qc->buf_virt = buf; |
Brian King | 233277c | 2006-06-07 11:25:31 -0500 | [diff] [blame] | 4251 | qc->nbytes = buflen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4252 | |
Tejun Heo | 61c0596 | 2006-11-14 22:35:43 +0900 | [diff] [blame] | 4253 | sg_init_one(&qc->sgent, buf, buflen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4254 | } |
| 4255 | |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4256 | /** |
| 4257 | * ata_sg_init - Associate command with scatter-gather table. |
| 4258 | * @qc: Command to be associated |
| 4259 | * @sg: Scatter-gather table. |
| 4260 | * @n_elem: Number of elements in s/g table. |
| 4261 | * |
| 4262 | * Initialize the data-related elements of queued_cmd @qc |
| 4263 | * to point to a scatter-gather table @sg, containing @n_elem |
| 4264 | * elements. |
| 4265 | * |
| 4266 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4267 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4268 | */ |
| 4269 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4270 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
| 4271 | unsigned int n_elem) |
| 4272 | { |
| 4273 | qc->flags |= ATA_QCFLAG_SG; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4274 | qc->__sg = sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4275 | qc->n_elem = n_elem; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4276 | qc->orig_n_elem = n_elem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4277 | } |
| 4278 | |
| 4279 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4280 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
| 4281 | * @qc: Command with memory buffer to be mapped. |
| 4282 | * |
| 4283 | * DMA-map the memory buffer associated with queued_cmd @qc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4284 | * |
| 4285 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4286 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4287 | * |
| 4288 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4289 | * Zero on success, negative on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4290 | */ |
| 4291 | |
| 4292 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) |
| 4293 | { |
| 4294 | struct ata_port *ap = qc->ap; |
| 4295 | int dir = qc->dma_dir; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4296 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4297 | dma_addr_t dma_address; |
Tejun Heo | 2e242fa | 2006-02-20 23:48:38 +0900 | [diff] [blame] | 4298 | int trim_sg = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4299 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4300 | /* we must lengthen transfers to end on a 32-bit boundary */ |
| 4301 | qc->pad_len = sg->length & 3; |
| 4302 | if (qc->pad_len) { |
| 4303 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); |
| 4304 | struct scatterlist *psg = &qc->pad_sgent; |
| 4305 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 4306 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4307 | |
| 4308 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); |
| 4309 | |
| 4310 | if (qc->tf.flags & ATA_TFLAG_WRITE) |
| 4311 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, |
| 4312 | qc->pad_len); |
| 4313 | |
| 4314 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); |
| 4315 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; |
| 4316 | /* trim sg */ |
| 4317 | sg->length -= qc->pad_len; |
Tejun Heo | 2e242fa | 2006-02-20 23:48:38 +0900 | [diff] [blame] | 4318 | if (sg->length == 0) |
| 4319 | trim_sg = 1; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4320 | |
| 4321 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", |
| 4322 | sg->length, qc->pad_len); |
| 4323 | } |
| 4324 | |
Tejun Heo | 2e242fa | 2006-02-20 23:48:38 +0900 | [diff] [blame] | 4325 | if (trim_sg) { |
| 4326 | qc->n_elem--; |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 4327 | goto skip_map; |
| 4328 | } |
| 4329 | |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 4330 | dma_address = dma_map_single(ap->dev, qc->buf_virt, |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 4331 | sg->length, dir); |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 4332 | if (dma_mapping_error(dma_address)) { |
| 4333 | /* restore sg */ |
| 4334 | sg->length += qc->pad_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4335 | return -1; |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 4336 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4337 | |
| 4338 | sg_dma_address(sg) = dma_address; |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 4339 | sg_dma_len(sg) = sg->length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4340 | |
Tejun Heo | 2e242fa | 2006-02-20 23:48:38 +0900 | [diff] [blame] | 4341 | skip_map: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4342 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
| 4343 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 4344 | |
| 4345 | return 0; |
| 4346 | } |
| 4347 | |
| 4348 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4349 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
| 4350 | * @qc: Command with scatter-gather table to be mapped. |
| 4351 | * |
| 4352 | * DMA-map the scatter-gather table associated with queued_cmd @qc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4353 | * |
| 4354 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4355 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4356 | * |
| 4357 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4358 | * Zero on success, negative on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4359 | * |
| 4360 | */ |
| 4361 | |
| 4362 | static int ata_sg_setup(struct ata_queued_cmd *qc) |
| 4363 | { |
| 4364 | struct ata_port *ap = qc->ap; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4365 | struct scatterlist *sg = qc->__sg; |
| 4366 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 4367 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4368 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 4369 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 4370 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4371 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4372 | /* we must lengthen transfers to end on a 32-bit boundary */ |
| 4373 | qc->pad_len = lsg->length & 3; |
| 4374 | if (qc->pad_len) { |
| 4375 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); |
| 4376 | struct scatterlist *psg = &qc->pad_sgent; |
| 4377 | unsigned int offset; |
| 4378 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 4379 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4380 | |
| 4381 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); |
| 4382 | |
| 4383 | /* |
| 4384 | * psg->page/offset are used to copy to-be-written |
| 4385 | * data in this function or read data in ata_sg_clean. |
| 4386 | */ |
| 4387 | offset = lsg->offset + lsg->length - qc->pad_len; |
| 4388 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); |
| 4389 | psg->offset = offset_in_page(offset); |
| 4390 | |
| 4391 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 4392 | void *addr = kmap_atomic(psg->page, KM_IRQ0); |
| 4393 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); |
Mark Lord | dfa1598 | 2005-12-12 23:19:28 -0500 | [diff] [blame] | 4394 | kunmap_atomic(addr, KM_IRQ0); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4395 | } |
| 4396 | |
| 4397 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); |
| 4398 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; |
| 4399 | /* trim last sg */ |
| 4400 | lsg->length -= qc->pad_len; |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 4401 | if (lsg->length == 0) |
| 4402 | trim_sg = 1; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4403 | |
| 4404 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", |
| 4405 | qc->n_elem - 1, lsg->length, qc->pad_len); |
| 4406 | } |
| 4407 | |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 4408 | pre_n_elem = qc->n_elem; |
| 4409 | if (trim_sg && pre_n_elem) |
| 4410 | pre_n_elem--; |
| 4411 | |
| 4412 | if (!pre_n_elem) { |
| 4413 | n_elem = 0; |
| 4414 | goto skip_map; |
| 4415 | } |
| 4416 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4417 | dir = qc->dma_dir; |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 4418 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 4419 | if (n_elem < 1) { |
| 4420 | /* restore last sg */ |
| 4421 | lsg->length += qc->pad_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4422 | return -1; |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 4423 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4424 | |
| 4425 | DPRINTK("%d sg elements mapped\n", n_elem); |
| 4426 | |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 4427 | skip_map: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4428 | qc->n_elem = n_elem; |
| 4429 | |
| 4430 | return 0; |
| 4431 | } |
| 4432 | |
| 4433 | /** |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 4434 | * swap_buf_le16 - swap halves of 16-bit words in place |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4435 | * @buf: Buffer to swap |
| 4436 | * @buf_words: Number of 16-bit words in buffer. |
| 4437 | * |
| 4438 | * Swap halves of 16-bit words if needed to convert from |
| 4439 | * little-endian byte order to native cpu byte order, or |
| 4440 | * vice-versa. |
| 4441 | * |
| 4442 | * LOCKING: |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 4443 | * Inherited from caller. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4444 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4445 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
| 4446 | { |
| 4447 | #ifdef __BIG_ENDIAN |
| 4448 | unsigned int i; |
| 4449 | |
| 4450 | for (i = 0; i < buf_words; i++) |
| 4451 | buf[i] = le16_to_cpu(buf[i]); |
| 4452 | #endif /* __BIG_ENDIAN */ |
| 4453 | } |
| 4454 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4455 | /** |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4456 | * ata_data_xfer - Transfer data by PIO |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4457 | * @adev: device to target |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4458 | * @buf: data buffer |
| 4459 | * @buflen: buffer length |
Jeff Garzik | 344baba | 2005-09-07 01:15:17 -0400 | [diff] [blame] | 4460 | * @write_data: read/write |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4461 | * |
| 4462 | * Transfer data from/to the device data register by PIO. |
| 4463 | * |
| 4464 | * LOCKING: |
| 4465 | * Inherited from caller. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4466 | */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4467 | void ata_data_xfer(struct ata_device *adev, unsigned char *buf, |
| 4468 | unsigned int buflen, int write_data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4469 | { |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4470 | struct ata_port *ap = adev->ap; |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4471 | unsigned int words = buflen >> 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4472 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4473 | /* Transfer multiple of 2 bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4474 | if (write_data) |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4475 | iowrite16_rep(ap->ioaddr.data_addr, buf, words); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4476 | else |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4477 | ioread16_rep(ap->ioaddr.data_addr, buf, words); |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4478 | |
| 4479 | /* Transfer trailing 1 byte, if any. */ |
| 4480 | if (unlikely(buflen & 0x01)) { |
| 4481 | u16 align_buf[1] = { 0 }; |
| 4482 | unsigned char *trailing_buf = buf + buflen - 1; |
| 4483 | |
| 4484 | if (write_data) { |
| 4485 | memcpy(align_buf, trailing_buf, 1); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4486 | iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4487 | } else { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4488 | align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4489 | memcpy(trailing_buf, align_buf, 1); |
| 4490 | } |
| 4491 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4492 | } |
| 4493 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4494 | /** |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4495 | * ata_data_xfer_noirq - Transfer data by PIO |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 4496 | * @adev: device to target |
| 4497 | * @buf: data buffer |
| 4498 | * @buflen: buffer length |
| 4499 | * @write_data: read/write |
| 4500 | * |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 4501 | * Transfer data from/to the device data register by PIO. Do the |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 4502 | * transfer with interrupts disabled. |
| 4503 | * |
| 4504 | * LOCKING: |
| 4505 | * Inherited from caller. |
| 4506 | */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4507 | void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, |
| 4508 | unsigned int buflen, int write_data) |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 4509 | { |
| 4510 | unsigned long flags; |
| 4511 | local_irq_save(flags); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4512 | ata_data_xfer(adev, buf, buflen, write_data); |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 4513 | local_irq_restore(flags); |
| 4514 | } |
| 4515 | |
| 4516 | |
| 4517 | /** |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 4518 | * ata_pio_sector - Transfer a sector of data. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4519 | * @qc: Command on going |
| 4520 | * |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 4521 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4522 | * |
| 4523 | * LOCKING: |
| 4524 | * Inherited from caller. |
| 4525 | */ |
| 4526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4527 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
| 4528 | { |
| 4529 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4530 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4531 | struct ata_port *ap = qc->ap; |
| 4532 | struct page *page; |
| 4533 | unsigned int offset; |
| 4534 | unsigned char *buf; |
| 4535 | |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 4536 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 4537 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4538 | |
| 4539 | page = sg[qc->cursg].page; |
Tejun Heo | 726f078 | 2007-01-03 17:30:39 +0900 | [diff] [blame] | 4540 | offset = sg[qc->cursg].offset + qc->cursg_ofs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4541 | |
| 4542 | /* get the current page and offset */ |
| 4543 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 4544 | offset %= PAGE_SIZE; |
| 4545 | |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 4546 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 4547 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4548 | if (PageHighMem(page)) { |
| 4549 | unsigned long flags; |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 4550 | |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4551 | /* FIXME: use a bounce buffer */ |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4552 | local_irq_save(flags); |
| 4553 | buf = kmap_atomic(page, KM_IRQ0); |
Albert Lee | 083958d | 2005-10-09 09:47:31 -0400 | [diff] [blame] | 4554 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4555 | /* do the actual data transfer */ |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 4556 | 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] | 4557 | |
| 4558 | kunmap_atomic(buf, KM_IRQ0); |
| 4559 | local_irq_restore(flags); |
| 4560 | } else { |
| 4561 | buf = page_address(page); |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 4562 | 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] | 4563 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4564 | |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 4565 | qc->curbytes += qc->sect_size; |
| 4566 | qc->cursg_ofs += qc->sect_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4567 | |
Tejun Heo | 726f078 | 2007-01-03 17:30:39 +0900 | [diff] [blame] | 4568 | if (qc->cursg_ofs == (&sg[qc->cursg])->length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4569 | qc->cursg++; |
| 4570 | qc->cursg_ofs = 0; |
| 4571 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4572 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4573 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4574 | /** |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 4575 | * ata_pio_sectors - Transfer one or many sectors. |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4576 | * @qc: Command on going |
| 4577 | * |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 4578 | * Transfer one or many sectors of data from/to the |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4579 | * ATA device for the DRQ request. |
| 4580 | * |
| 4581 | * LOCKING: |
| 4582 | * Inherited from caller. |
| 4583 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4584 | |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4585 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
| 4586 | { |
| 4587 | if (is_multi_taskfile(&qc->tf)) { |
| 4588 | /* READ/WRITE MULTIPLE */ |
| 4589 | unsigned int nsect; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4590 | |
Jeff Garzik | 587005d | 2006-02-11 18:17:32 -0500 | [diff] [blame] | 4591 | WARN_ON(qc->dev->multi_count == 0); |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4592 | |
Mark Lord | 5a5dbd1 | 2007-03-16 10:22:26 -0400 | [diff] [blame] | 4593 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
Tejun Heo | 726f078 | 2007-01-03 17:30:39 +0900 | [diff] [blame] | 4594 | qc->dev->multi_count); |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4595 | while (nsect--) |
| 4596 | ata_pio_sector(qc); |
| 4597 | } else |
| 4598 | ata_pio_sector(qc); |
| 4599 | } |
| 4600 | |
| 4601 | /** |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 4602 | * atapi_send_cdb - Write CDB bytes to hardware |
| 4603 | * @ap: Port to which ATAPI device is attached. |
| 4604 | * @qc: Taskfile currently active |
| 4605 | * |
| 4606 | * When device has indicated its readiness to accept |
| 4607 | * a CDB, this function is called. Send the CDB. |
| 4608 | * |
| 4609 | * LOCKING: |
| 4610 | * caller. |
| 4611 | */ |
| 4612 | |
| 4613 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) |
| 4614 | { |
| 4615 | /* send SCSI cdb */ |
| 4616 | DPRINTK("send cdb\n"); |
Jeff Garzik | db024d5 | 2006-02-13 00:23:57 -0500 | [diff] [blame] | 4617 | WARN_ON(qc->dev->cdb_len < 12); |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 4618 | |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4619 | 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] | 4620 | ata_altstatus(ap); /* flush */ |
| 4621 | |
| 4622 | switch (qc->tf.protocol) { |
| 4623 | case ATA_PROT_ATAPI: |
| 4624 | ap->hsm_task_state = HSM_ST; |
| 4625 | break; |
| 4626 | case ATA_PROT_ATAPI_NODATA: |
| 4627 | ap->hsm_task_state = HSM_ST_LAST; |
| 4628 | break; |
| 4629 | case ATA_PROT_ATAPI_DMA: |
| 4630 | ap->hsm_task_state = HSM_ST_LAST; |
| 4631 | /* initiate bmdma */ |
| 4632 | ap->ops->bmdma_start(qc); |
| 4633 | break; |
| 4634 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4635 | } |
| 4636 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4637 | /** |
| 4638 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 4639 | * @qc: Command on going |
| 4640 | * @bytes: number of bytes |
| 4641 | * |
| 4642 | * Transfer Transfer data from/to the ATAPI device. |
| 4643 | * |
| 4644 | * LOCKING: |
| 4645 | * Inherited from caller. |
| 4646 | * |
| 4647 | */ |
| 4648 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4649 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
| 4650 | { |
| 4651 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4652 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4653 | struct ata_port *ap = qc->ap; |
| 4654 | struct page *page; |
| 4655 | unsigned char *buf; |
| 4656 | unsigned int offset, count; |
| 4657 | |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4658 | if (qc->curbytes + bytes >= qc->nbytes) |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 4659 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4660 | |
| 4661 | next_sg: |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4662 | if (unlikely(qc->cursg >= qc->n_elem)) { |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 4663 | /* |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4664 | * The end of qc->sg is reached and the device expects |
| 4665 | * more data to transfer. In order not to overrun qc->sg |
| 4666 | * and fulfill length specified in the byte count register, |
| 4667 | * - for read case, discard trailing data from the device |
| 4668 | * - for write case, padding zero data to the device |
| 4669 | */ |
| 4670 | u16 pad_buf[1] = { 0 }; |
| 4671 | unsigned int words = bytes >> 1; |
| 4672 | unsigned int i; |
| 4673 | |
| 4674 | if (words) /* warning if bytes > 1 */ |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 4675 | ata_dev_printk(qc->dev, KERN_WARNING, |
| 4676 | "%u bytes trailing data\n", bytes); |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4677 | |
| 4678 | for (i = 0; i < words; i++) |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4679 | ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4680 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 4681 | ap->hsm_task_state = HSM_ST_LAST; |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4682 | return; |
| 4683 | } |
| 4684 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4685 | sg = &qc->__sg[qc->cursg]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4686 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4687 | page = sg->page; |
| 4688 | offset = sg->offset + qc->cursg_ofs; |
| 4689 | |
| 4690 | /* get the current page and offset */ |
| 4691 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 4692 | offset %= PAGE_SIZE; |
| 4693 | |
Albert Lee | 6952df0 | 2005-06-06 15:56:03 +0800 | [diff] [blame] | 4694 | /* don't overrun current sg */ |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 4695 | count = min(sg->length - qc->cursg_ofs, bytes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4696 | |
| 4697 | /* don't cross page boundaries */ |
| 4698 | count = min(count, (unsigned int)PAGE_SIZE - offset); |
| 4699 | |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 4700 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 4701 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4702 | if (PageHighMem(page)) { |
| 4703 | unsigned long flags; |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 4704 | |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4705 | /* FIXME: use bounce buffer */ |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4706 | local_irq_save(flags); |
| 4707 | buf = kmap_atomic(page, KM_IRQ0); |
Albert Lee | 083958d | 2005-10-09 09:47:31 -0400 | [diff] [blame] | 4708 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4709 | /* do the actual data transfer */ |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4710 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4711 | |
| 4712 | kunmap_atomic(buf, KM_IRQ0); |
| 4713 | local_irq_restore(flags); |
| 4714 | } else { |
| 4715 | buf = page_address(page); |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4716 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4717 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4718 | |
| 4719 | bytes -= count; |
| 4720 | qc->curbytes += count; |
| 4721 | qc->cursg_ofs += count; |
| 4722 | |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 4723 | if (qc->cursg_ofs == sg->length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4724 | qc->cursg++; |
| 4725 | qc->cursg_ofs = 0; |
| 4726 | } |
| 4727 | |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4728 | if (bytes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4729 | goto next_sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4730 | } |
| 4731 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4732 | /** |
| 4733 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 4734 | * @qc: Command on going |
| 4735 | * |
| 4736 | * Transfer Transfer data from/to the ATAPI device. |
| 4737 | * |
| 4738 | * LOCKING: |
| 4739 | * Inherited from caller. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4740 | */ |
| 4741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4742 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
| 4743 | { |
| 4744 | struct ata_port *ap = qc->ap; |
| 4745 | struct ata_device *dev = qc->dev; |
| 4746 | unsigned int ireason, bc_lo, bc_hi, bytes; |
| 4747 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; |
| 4748 | |
Albert Lee | eec4c3f | 2006-05-18 17:51:10 +0800 | [diff] [blame] | 4749 | /* Abuse qc->result_tf for temp storage of intermediate TF |
| 4750 | * here to save some kernel stack usage. |
| 4751 | * For normal completion, qc->result_tf is not relevant. For |
| 4752 | * error, qc->result_tf is later overwritten by ata_qc_complete(). |
| 4753 | * So, the correctness of qc->result_tf is not affected. |
| 4754 | */ |
| 4755 | ap->ops->tf_read(ap, &qc->result_tf); |
| 4756 | ireason = qc->result_tf.nsect; |
| 4757 | bc_lo = qc->result_tf.lbam; |
| 4758 | bc_hi = qc->result_tf.lbah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4759 | bytes = (bc_hi << 8) | bc_lo; |
| 4760 | |
| 4761 | /* shall be cleared to zero, indicating xfer of data */ |
| 4762 | if (ireason & (1 << 0)) |
| 4763 | goto err_out; |
| 4764 | |
| 4765 | /* make sure transfer direction matches expected */ |
| 4766 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; |
| 4767 | if (do_write != i_write) |
| 4768 | goto err_out; |
| 4769 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 4770 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4772 | __atapi_pio_bytes(qc, bytes); |
| 4773 | |
| 4774 | return; |
| 4775 | |
| 4776 | err_out: |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 4777 | ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); |
Tejun Heo | 11a56d2 | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 4778 | qc->err_mask |= AC_ERR_HSM; |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 4779 | ap->hsm_task_state = HSM_ST_ERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4780 | } |
| 4781 | |
| 4782 | /** |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4783 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
| 4784 | * @ap: the target ata_port |
| 4785 | * @qc: qc on going |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4786 | * |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4787 | * RETURNS: |
| 4788 | * 1 if ok in workqueue, 0 otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4789 | */ |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4790 | |
| 4791 | 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] | 4792 | { |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4793 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 4794 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4795 | |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4796 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
| 4797 | if (qc->tf.protocol == ATA_PROT_PIO && |
| 4798 | (qc->tf.flags & ATA_TFLAG_WRITE)) |
| 4799 | return 1; |
| 4800 | |
| 4801 | if (is_atapi_taskfile(&qc->tf) && |
| 4802 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
| 4803 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4804 | } |
| 4805 | |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4806 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4807 | } |
| 4808 | |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4809 | /** |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4810 | * ata_hsm_qc_complete - finish a qc running on standard HSM |
| 4811 | * @qc: Command to complete |
| 4812 | * @in_wq: 1 if called from workqueue, 0 otherwise |
| 4813 | * |
| 4814 | * Finish @qc which is running on standard HSM. |
| 4815 | * |
| 4816 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4817 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4818 | * Otherwise, none on entry and grabs host lock. |
| 4819 | */ |
| 4820 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) |
| 4821 | { |
| 4822 | struct ata_port *ap = qc->ap; |
| 4823 | unsigned long flags; |
| 4824 | |
| 4825 | if (ap->ops->error_handler) { |
| 4826 | if (in_wq) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4827 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4828 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4829 | /* EH might have kicked in while host lock is |
| 4830 | * released. |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4831 | */ |
| 4832 | qc = ata_qc_from_tag(ap, qc->tag); |
| 4833 | if (qc) { |
| 4834 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 4835 | ap->ops->irq_on(ap); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4836 | ata_qc_complete(qc); |
| 4837 | } else |
| 4838 | ata_port_freeze(ap); |
| 4839 | } |
| 4840 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4841 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4842 | } else { |
| 4843 | if (likely(!(qc->err_mask & AC_ERR_HSM))) |
| 4844 | ata_qc_complete(qc); |
| 4845 | else |
| 4846 | ata_port_freeze(ap); |
| 4847 | } |
| 4848 | } else { |
| 4849 | if (in_wq) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4850 | spin_lock_irqsave(ap->lock, flags); |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 4851 | ap->ops->irq_on(ap); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4852 | ata_qc_complete(qc); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4853 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4854 | } else |
| 4855 | ata_qc_complete(qc); |
| 4856 | } |
| 4857 | } |
| 4858 | |
| 4859 | /** |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4860 | * ata_hsm_move - move the HSM to the next state. |
| 4861 | * @ap: the target ata_port |
| 4862 | * @qc: qc on going |
| 4863 | * @status: current device status |
| 4864 | * @in_wq: 1 if called from workqueue, 0 otherwise |
| 4865 | * |
| 4866 | * RETURNS: |
| 4867 | * 1 when poll next status needed, 0 otherwise. |
| 4868 | */ |
Tejun Heo | 9a1004d | 2006-05-31 18:27:52 +0900 | [diff] [blame] | 4869 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
| 4870 | u8 status, int in_wq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4871 | { |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4872 | unsigned long flags = 0; |
| 4873 | int poll_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4874 | |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 4875 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
Albert Lee | 0565c26 | 2006-02-13 18:55:25 +0800 | [diff] [blame] | 4876 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4877 | /* Make sure ata_qc_issue_prot() does not throw things |
| 4878 | * like DMA polling into the workqueue. Notice that |
| 4879 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). |
Albert Lee | 1c84898 | 2005-12-05 15:40:15 +0800 | [diff] [blame] | 4880 | */ |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4881 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
Albert Lee | 1c84898 | 2005-12-05 15:40:15 +0800 | [diff] [blame] | 4882 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4883 | fsm_start: |
Albert Lee | 999bb6f | 2006-03-25 18:07:48 +0800 | [diff] [blame] | 4884 | 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] | 4885 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4886 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4887 | switch (ap->hsm_task_state) { |
| 4888 | case HSM_ST_FIRST: |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4889 | /* Send first data block or PACKET CDB */ |
| 4890 | |
| 4891 | /* If polling, we will stay in the work queue after |
| 4892 | * sending the data. Otherwise, interrupt handler |
| 4893 | * takes over after sending the data. |
| 4894 | */ |
| 4895 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); |
| 4896 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4897 | /* check device status */ |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4898 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 4899 | /* handle BSY=0, DRQ=0 as error */ |
| 4900 | if (likely(status & (ATA_ERR | ATA_DF))) |
| 4901 | /* device stops HSM for abort/error */ |
| 4902 | qc->err_mask |= AC_ERR_DEV; |
| 4903 | else |
| 4904 | /* HSM violation. Let EH handle this */ |
| 4905 | qc->err_mask |= AC_ERR_HSM; |
| 4906 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4907 | ap->hsm_task_state = HSM_ST_ERR; |
| 4908 | goto fsm_start; |
| 4909 | } |
| 4910 | |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4911 | /* Device should not ask for data transfer (DRQ=1) |
| 4912 | * when it finds something wrong. |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4913 | * We ignore DRQ here and stop the HSM by |
| 4914 | * changing hsm_task_state to HSM_ST_ERR and |
| 4915 | * let the EH abort the command or reset the device. |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4916 | */ |
| 4917 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 4918 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " |
| 4919 | "error, dev_stat 0x%X\n", status); |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4920 | qc->err_mask |= AC_ERR_HSM; |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4921 | ap->hsm_task_state = HSM_ST_ERR; |
| 4922 | goto fsm_start; |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4923 | } |
| 4924 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4925 | /* Send the CDB (atapi) or the first data block (ata pio out). |
| 4926 | * During the state transition, interrupt handler shouldn't |
| 4927 | * be invoked before the data transfer is complete and |
| 4928 | * hsm_task_state is changed. Hence, the following locking. |
| 4929 | */ |
| 4930 | if (in_wq) |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4931 | spin_lock_irqsave(ap->lock, flags); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4932 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4933 | if (qc->tf.protocol == ATA_PROT_PIO) { |
| 4934 | /* PIO data out protocol. |
| 4935 | * send first data block. |
| 4936 | */ |
| 4937 | |
| 4938 | /* ata_pio_sectors() might change the state |
| 4939 | * to HSM_ST_LAST. so, the state is changed here |
| 4940 | * before ata_pio_sectors(). |
| 4941 | */ |
| 4942 | ap->hsm_task_state = HSM_ST; |
| 4943 | ata_pio_sectors(qc); |
| 4944 | ata_altstatus(ap); /* flush */ |
| 4945 | } else |
| 4946 | /* send CDB */ |
| 4947 | atapi_send_cdb(ap, qc); |
| 4948 | |
| 4949 | if (in_wq) |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4950 | spin_unlock_irqrestore(ap->lock, flags); |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4951 | |
| 4952 | /* if polling, ata_pio_task() handles the rest. |
| 4953 | * otherwise, interrupt handler takes over from here. |
| 4954 | */ |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4955 | break; |
| 4956 | |
| 4957 | case HSM_ST: |
| 4958 | /* complete command or read/write the data register */ |
| 4959 | if (qc->tf.protocol == ATA_PROT_ATAPI) { |
| 4960 | /* ATAPI PIO protocol */ |
| 4961 | if ((status & ATA_DRQ) == 0) { |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4962 | /* No more data to transfer or device error. |
| 4963 | * Device error will be tagged in HSM_ST_LAST. |
| 4964 | */ |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4965 | ap->hsm_task_state = HSM_ST_LAST; |
| 4966 | goto fsm_start; |
| 4967 | } |
| 4968 | |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4969 | /* Device should not ask for data transfer (DRQ=1) |
| 4970 | * when it finds something wrong. |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4971 | * We ignore DRQ here and stop the HSM by |
| 4972 | * changing hsm_task_state to HSM_ST_ERR and |
| 4973 | * let the EH abort the command or reset the device. |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4974 | */ |
| 4975 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 4976 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " |
| 4977 | "device error, dev_stat 0x%X\n", |
| 4978 | status); |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4979 | qc->err_mask |= AC_ERR_HSM; |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4980 | ap->hsm_task_state = HSM_ST_ERR; |
| 4981 | goto fsm_start; |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4982 | } |
| 4983 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4984 | atapi_pio_bytes(qc); |
| 4985 | |
| 4986 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
| 4987 | /* bad ireason reported by device */ |
| 4988 | goto fsm_start; |
| 4989 | |
| 4990 | } else { |
| 4991 | /* ATA PIO protocol */ |
| 4992 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 4993 | /* handle BSY=0, DRQ=0 as error */ |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4994 | if (likely(status & (ATA_ERR | ATA_DF))) |
| 4995 | /* device stops HSM for abort/error */ |
| 4996 | qc->err_mask |= AC_ERR_DEV; |
| 4997 | else |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 4998 | /* HSM violation. Let EH handle this. |
| 4999 | * Phantom devices also trigger this |
| 5000 | * condition. Mark hint. |
| 5001 | */ |
| 5002 | qc->err_mask |= AC_ERR_HSM | |
| 5003 | AC_ERR_NODEV_HINT; |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 5004 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5005 | ap->hsm_task_state = HSM_ST_ERR; |
| 5006 | goto fsm_start; |
| 5007 | } |
| 5008 | |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 5009 | /* For PIO reads, some devices may ask for |
| 5010 | * data transfer (DRQ=1) alone with ERR=1. |
| 5011 | * We respect DRQ here and transfer one |
| 5012 | * block of junk data before changing the |
| 5013 | * hsm_task_state to HSM_ST_ERR. |
| 5014 | * |
| 5015 | * For PIO writes, ERR=1 DRQ=1 doesn't make |
| 5016 | * sense since the data block has been |
| 5017 | * transferred to the device. |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5018 | */ |
| 5019 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5020 | /* data might be corrputed */ |
| 5021 | qc->err_mask |= AC_ERR_DEV; |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 5022 | |
| 5023 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { |
| 5024 | ata_pio_sectors(qc); |
| 5025 | ata_altstatus(ap); |
| 5026 | status = ata_wait_idle(ap); |
| 5027 | } |
| 5028 | |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 5029 | if (status & (ATA_BUSY | ATA_DRQ)) |
| 5030 | qc->err_mask |= AC_ERR_HSM; |
| 5031 | |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 5032 | /* ata_pio_sectors() might change the |
| 5033 | * state to HSM_ST_LAST. so, the state |
| 5034 | * is changed after ata_pio_sectors(). |
| 5035 | */ |
| 5036 | ap->hsm_task_state = HSM_ST_ERR; |
| 5037 | goto fsm_start; |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 5038 | } |
| 5039 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5040 | ata_pio_sectors(qc); |
| 5041 | |
| 5042 | if (ap->hsm_task_state == HSM_ST_LAST && |
| 5043 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { |
| 5044 | /* all data read */ |
| 5045 | ata_altstatus(ap); |
Albert Lee | 52a3220 | 2006-03-25 18:18:15 +0800 | [diff] [blame] | 5046 | status = ata_wait_idle(ap); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5047 | goto fsm_start; |
| 5048 | } |
| 5049 | } |
| 5050 | |
| 5051 | ata_altstatus(ap); /* flush */ |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5052 | poll_next = 1; |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5053 | break; |
| 5054 | |
| 5055 | case HSM_ST_LAST: |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 5056 | if (unlikely(!ata_ok(status))) { |
| 5057 | qc->err_mask |= __ac_err_mask(status); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5058 | ap->hsm_task_state = HSM_ST_ERR; |
| 5059 | goto fsm_start; |
| 5060 | } |
| 5061 | |
| 5062 | /* no more data to transfer */ |
Albert Lee | 4332a77 | 2006-04-03 17:43:24 +0800 | [diff] [blame] | 5063 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5064 | ap->print_id, qc->dev->devno, status); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5065 | |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 5066 | WARN_ON(qc->err_mask); |
| 5067 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5068 | ap->hsm_task_state = HSM_ST_IDLE; |
| 5069 | |
| 5070 | /* complete taskfile transaction */ |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5071 | ata_hsm_qc_complete(qc, in_wq); |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5072 | |
| 5073 | poll_next = 0; |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5074 | break; |
| 5075 | |
| 5076 | case HSM_ST_ERR: |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5077 | /* make sure qc->err_mask is available to |
| 5078 | * know what's wrong and recover |
| 5079 | */ |
| 5080 | WARN_ON(qc->err_mask == 0); |
| 5081 | |
| 5082 | ap->hsm_task_state = HSM_ST_IDLE; |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5083 | |
Albert Lee | 999bb6f | 2006-03-25 18:07:48 +0800 | [diff] [blame] | 5084 | /* complete taskfile transaction */ |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 5085 | ata_hsm_qc_complete(qc, in_wq); |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5086 | |
| 5087 | poll_next = 0; |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5088 | break; |
| 5089 | default: |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5090 | poll_next = 0; |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 5091 | BUG(); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 5092 | } |
| 5093 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5094 | return poll_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5095 | } |
| 5096 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 5097 | static void ata_pio_task(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5098 | { |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 5099 | struct ata_port *ap = |
| 5100 | container_of(work, struct ata_port, port_task.work); |
| 5101 | struct ata_queued_cmd *qc = ap->port_task_data; |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 5102 | u8 status; |
| 5103 | int poll_next; |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 5104 | |
| 5105 | fsm_start: |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 5106 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5107 | |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 5108 | /* |
| 5109 | * This is purely heuristic. This is a fast path. |
| 5110 | * Sometimes when we enter, BSY will be cleared in |
| 5111 | * a chk-status or two. If not, the drive is probably seeking |
| 5112 | * or something. Snooze for a couple msecs, then |
| 5113 | * chk-status again. If still busy, queue delayed work. |
| 5114 | */ |
| 5115 | status = ata_busy_wait(ap, ATA_BUSY, 5); |
| 5116 | if (status & ATA_BUSY) { |
| 5117 | msleep(2); |
| 5118 | status = ata_busy_wait(ap, ATA_BUSY, 10); |
| 5119 | if (status & ATA_BUSY) { |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5120 | ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 5121 | return; |
| 5122 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5123 | } |
| 5124 | |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 5125 | /* move the HSM */ |
| 5126 | poll_next = ata_hsm_move(ap, qc, status, 1); |
| 5127 | |
| 5128 | /* another command or interrupt handler |
| 5129 | * may be running at this point. |
| 5130 | */ |
| 5131 | if (poll_next) |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 5132 | goto fsm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5133 | } |
| 5134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5135 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5136 | * ata_qc_new - Request an available ATA command, for queueing |
| 5137 | * @ap: Port associated with device @dev |
| 5138 | * @dev: Device from whom we request an available command structure |
| 5139 | * |
| 5140 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5141 | * None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5142 | */ |
| 5143 | |
| 5144 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) |
| 5145 | { |
| 5146 | struct ata_queued_cmd *qc = NULL; |
| 5147 | unsigned int i; |
| 5148 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 5149 | /* no command while frozen */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 5150 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 5151 | return NULL; |
| 5152 | |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 5153 | /* the last tag is reserved for internal command. */ |
| 5154 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) |
Tejun Heo | 6cec4a3 | 2006-05-15 21:03:41 +0900 | [diff] [blame] | 5155 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
Tejun Heo | f69499f | 2006-05-15 20:58:03 +0900 | [diff] [blame] | 5156 | qc = __ata_qc_from_tag(ap, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5157 | break; |
| 5158 | } |
| 5159 | |
| 5160 | if (qc) |
| 5161 | qc->tag = i; |
| 5162 | |
| 5163 | return qc; |
| 5164 | } |
| 5165 | |
| 5166 | /** |
| 5167 | * ata_qc_new_init - Request an available ATA command, and initialize it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5168 | * @dev: Device from whom we request an available command structure |
| 5169 | * |
| 5170 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5171 | * None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5172 | */ |
| 5173 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 5174 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5175 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 5176 | struct ata_port *ap = dev->ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5177 | struct ata_queued_cmd *qc; |
| 5178 | |
| 5179 | qc = ata_qc_new(ap); |
| 5180 | if (qc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5181 | qc->scsicmd = NULL; |
| 5182 | qc->ap = ap; |
| 5183 | qc->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5184 | |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 5185 | ata_qc_reinit(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5186 | } |
| 5187 | |
| 5188 | return qc; |
| 5189 | } |
| 5190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5191 | /** |
| 5192 | * ata_qc_free - free unused ata_queued_cmd |
| 5193 | * @qc: Command to complete |
| 5194 | * |
| 5195 | * Designed to free unused ata_queued_cmd object |
| 5196 | * in case something prevents using it. |
| 5197 | * |
| 5198 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5199 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5200 | */ |
| 5201 | void ata_qc_free(struct ata_queued_cmd *qc) |
| 5202 | { |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5203 | struct ata_port *ap = qc->ap; |
| 5204 | unsigned int tag; |
| 5205 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 5206 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5207 | |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5208 | qc->flags = 0; |
| 5209 | tag = qc->tag; |
| 5210 | if (likely(ata_tag_valid(tag))) { |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5211 | qc->tag = ATA_TAG_POISON; |
Tejun Heo | 6cec4a3 | 2006-05-15 21:03:41 +0900 | [diff] [blame] | 5212 | clear_bit(tag, &ap->qc_allocated); |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5213 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5214 | } |
| 5215 | |
Tejun Heo | 7601442 | 2006-02-11 15:13:49 +0900 | [diff] [blame] | 5216 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5217 | { |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5218 | struct ata_port *ap = qc->ap; |
| 5219 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 5220 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
| 5221 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5222 | |
| 5223 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 5224 | ata_sg_clean(qc); |
| 5225 | |
Tejun Heo | 7401abf | 2006-05-15 20:57:32 +0900 | [diff] [blame] | 5226 | /* command should be marked inactive atomically with qc completion */ |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5227 | if (qc->tf.protocol == ATA_PROT_NCQ) |
| 5228 | ap->sactive &= ~(1 << qc->tag); |
| 5229 | else |
| 5230 | ap->active_tag = ATA_TAG_POISON; |
Tejun Heo | 7401abf | 2006-05-15 20:57:32 +0900 | [diff] [blame] | 5231 | |
Albert Lee | 3f3791d | 2005-08-16 14:25:38 +0800 | [diff] [blame] | 5232 | /* atapi: mark qc as inactive to prevent the interrupt handler |
| 5233 | * from completing the command twice later, before the error handler |
| 5234 | * is called. (when rc != 0 and atapi request sense is needed) |
| 5235 | */ |
| 5236 | qc->flags &= ~ATA_QCFLAG_ACTIVE; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5237 | ap->qc_active &= ~(1 << qc->tag); |
Albert Lee | 3f3791d | 2005-08-16 14:25:38 +0800 | [diff] [blame] | 5238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5239 | /* call completion callback */ |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5240 | qc->complete_fn(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5241 | } |
| 5242 | |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5243 | static void fill_result_tf(struct ata_queued_cmd *qc) |
| 5244 | { |
| 5245 | struct ata_port *ap = qc->ap; |
| 5246 | |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5247 | qc->result_tf.flags = qc->tf.flags; |
Mark Lord | 4742d54 | 2007-04-02 16:20:35 -0400 | [diff] [blame] | 5248 | ap->ops->tf_read(ap, &qc->result_tf); |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5249 | } |
| 5250 | |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5251 | /** |
| 5252 | * ata_qc_complete - Complete an active ATA command |
| 5253 | * @qc: Command to complete |
| 5254 | * @err_mask: ATA Status register contents |
| 5255 | * |
| 5256 | * Indicate to the mid and upper layers that an ATA |
| 5257 | * command has completed, with either an ok or not-ok status. |
| 5258 | * |
| 5259 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5260 | * spin_lock_irqsave(host lock) |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5261 | */ |
| 5262 | void ata_qc_complete(struct ata_queued_cmd *qc) |
| 5263 | { |
| 5264 | struct ata_port *ap = qc->ap; |
| 5265 | |
| 5266 | /* XXX: New EH and old EH use different mechanisms to |
| 5267 | * synchronize EH with regular execution path. |
| 5268 | * |
| 5269 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. |
| 5270 | * Normal execution path is responsible for not accessing a |
| 5271 | * failed qc. libata core enforces the rule by returning NULL |
| 5272 | * from ata_qc_from_tag() for failed qcs. |
| 5273 | * |
| 5274 | * Old EH depends on ata_qc_complete() nullifying completion |
| 5275 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does |
| 5276 | * not synchronize with interrupt handler. Only PIO task is |
| 5277 | * taken care of. |
| 5278 | */ |
| 5279 | if (ap->ops->error_handler) { |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 5280 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5281 | |
| 5282 | if (unlikely(qc->err_mask)) |
| 5283 | qc->flags |= ATA_QCFLAG_FAILED; |
| 5284 | |
| 5285 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { |
| 5286 | if (!ata_tag_internal(qc->tag)) { |
| 5287 | /* always fill result TF for failed qc */ |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5288 | fill_result_tf(qc); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5289 | ata_qc_schedule_eh(qc); |
| 5290 | return; |
| 5291 | } |
| 5292 | } |
| 5293 | |
| 5294 | /* read result TF if requested */ |
| 5295 | if (qc->flags & ATA_QCFLAG_RESULT_TF) |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5296 | fill_result_tf(qc); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5297 | |
| 5298 | __ata_qc_complete(qc); |
| 5299 | } else { |
| 5300 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) |
| 5301 | return; |
| 5302 | |
| 5303 | /* read result TF if failed or requested */ |
| 5304 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 5305 | fill_result_tf(qc); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 5306 | |
| 5307 | __ata_qc_complete(qc); |
| 5308 | } |
| 5309 | } |
| 5310 | |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5311 | /** |
| 5312 | * ata_qc_complete_multiple - Complete multiple qcs successfully |
| 5313 | * @ap: port in question |
| 5314 | * @qc_active: new qc_active mask |
| 5315 | * @finish_qc: LLDD callback invoked before completing a qc |
| 5316 | * |
| 5317 | * Complete in-flight commands. This functions is meant to be |
| 5318 | * called from low-level driver's interrupt routine to complete |
| 5319 | * requests normally. ap->qc_active and @qc_active is compared |
| 5320 | * and commands are completed accordingly. |
| 5321 | * |
| 5322 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5323 | * spin_lock_irqsave(host lock) |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5324 | * |
| 5325 | * RETURNS: |
| 5326 | * Number of completed commands on success, -errno otherwise. |
| 5327 | */ |
| 5328 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, |
| 5329 | void (*finish_qc)(struct ata_queued_cmd *)) |
| 5330 | { |
| 5331 | int nr_done = 0; |
| 5332 | u32 done_mask; |
| 5333 | int i; |
| 5334 | |
| 5335 | done_mask = ap->qc_active ^ qc_active; |
| 5336 | |
| 5337 | if (unlikely(done_mask & qc_active)) { |
| 5338 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " |
| 5339 | "(%08x->%08x)\n", ap->qc_active, qc_active); |
| 5340 | return -EINVAL; |
| 5341 | } |
| 5342 | |
| 5343 | for (i = 0; i < ATA_MAX_QUEUE; i++) { |
| 5344 | struct ata_queued_cmd *qc; |
| 5345 | |
| 5346 | if (!(done_mask & (1 << i))) |
| 5347 | continue; |
| 5348 | |
| 5349 | if ((qc = ata_qc_from_tag(ap, i))) { |
| 5350 | if (finish_qc) |
| 5351 | finish_qc(qc); |
| 5352 | ata_qc_complete(qc); |
| 5353 | nr_done++; |
| 5354 | } |
| 5355 | } |
| 5356 | |
| 5357 | return nr_done; |
| 5358 | } |
| 5359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5360 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
| 5361 | { |
| 5362 | struct ata_port *ap = qc->ap; |
| 5363 | |
| 5364 | switch (qc->tf.protocol) { |
Tejun Heo | 3dc1d88 | 2006-05-15 21:03:45 +0900 | [diff] [blame] | 5365 | case ATA_PROT_NCQ: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5366 | case ATA_PROT_DMA: |
| 5367 | case ATA_PROT_ATAPI_DMA: |
| 5368 | return 1; |
| 5369 | |
| 5370 | case ATA_PROT_ATAPI: |
| 5371 | case ATA_PROT_PIO: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5372 | if (ap->flags & ATA_FLAG_PIO_DMA) |
| 5373 | return 1; |
| 5374 | |
| 5375 | /* fall through */ |
| 5376 | |
| 5377 | default: |
| 5378 | return 0; |
| 5379 | } |
| 5380 | |
| 5381 | /* never reached */ |
| 5382 | } |
| 5383 | |
| 5384 | /** |
| 5385 | * ata_qc_issue - issue taskfile to device |
| 5386 | * @qc: command to issue to device |
| 5387 | * |
| 5388 | * Prepare an ATA command to submission to device. |
| 5389 | * This includes mapping the data into a DMA-able |
| 5390 | * area, filling in the S/G table, and finally |
| 5391 | * writing the taskfile to hardware, starting the command. |
| 5392 | * |
| 5393 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5394 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5395 | */ |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 5396 | void ata_qc_issue(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5397 | { |
| 5398 | struct ata_port *ap = qc->ap; |
| 5399 | |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5400 | /* Make sure only one non-NCQ command is outstanding. The |
| 5401 | * check is skipped for old EH because it reuses active qc to |
| 5402 | * request ATAPI sense. |
| 5403 | */ |
| 5404 | WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); |
| 5405 | |
| 5406 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
| 5407 | WARN_ON(ap->sactive & (1 << qc->tag)); |
| 5408 | ap->sactive |= 1 << qc->tag; |
| 5409 | } else { |
| 5410 | WARN_ON(ap->sactive); |
| 5411 | ap->active_tag = qc->tag; |
| 5412 | } |
| 5413 | |
Tejun Heo | e4a70e7 | 2006-03-31 20:36:47 +0900 | [diff] [blame] | 5414 | qc->flags |= ATA_QCFLAG_ACTIVE; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5415 | ap->qc_active |= 1 << qc->tag; |
Tejun Heo | e4a70e7 | 2006-03-31 20:36:47 +0900 | [diff] [blame] | 5416 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5417 | if (ata_should_dma_map(qc)) { |
| 5418 | if (qc->flags & ATA_QCFLAG_SG) { |
| 5419 | if (ata_sg_setup(qc)) |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5420 | goto sg_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5421 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
| 5422 | if (ata_sg_setup_one(qc)) |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5423 | goto sg_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5424 | } |
| 5425 | } else { |
| 5426 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
| 5427 | } |
| 5428 | |
| 5429 | ap->ops->qc_prep(qc); |
| 5430 | |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 5431 | qc->err_mask |= ap->ops->qc_issue(qc); |
| 5432 | if (unlikely(qc->err_mask)) |
| 5433 | goto err; |
| 5434 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5435 | |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5436 | sg_err: |
| 5437 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 5438 | qc->err_mask |= AC_ERR_SYSTEM; |
| 5439 | err: |
| 5440 | ata_qc_complete(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5441 | } |
| 5442 | |
| 5443 | /** |
| 5444 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner |
| 5445 | * @qc: command to issue to device |
| 5446 | * |
| 5447 | * Using various libata functions and hooks, this function |
| 5448 | * starts an ATA command. ATA commands are grouped into |
| 5449 | * classes called "protocols", and issuing each type of protocol |
| 5450 | * is slightly different. |
| 5451 | * |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 5452 | * May be used as the qc_issue() entry in ata_port_operations. |
| 5453 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5454 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5455 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5456 | * |
| 5457 | * RETURNS: |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5458 | * Zero on success, AC_ERR_* mask on failure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5459 | */ |
| 5460 | |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5461 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5462 | { |
| 5463 | struct ata_port *ap = qc->ap; |
| 5464 | |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 5465 | /* Use polling pio if the LLD doesn't handle |
| 5466 | * interrupt driven pio and atapi CDB interrupt. |
| 5467 | */ |
| 5468 | if (ap->flags & ATA_FLAG_PIO_POLLING) { |
| 5469 | switch (qc->tf.protocol) { |
| 5470 | case ATA_PROT_PIO: |
Albert Lee | e3472cb | 2006-12-07 11:37:58 +0800 | [diff] [blame] | 5471 | case ATA_PROT_NODATA: |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 5472 | case ATA_PROT_ATAPI: |
| 5473 | case ATA_PROT_ATAPI_NODATA: |
| 5474 | qc->tf.flags |= ATA_TFLAG_POLLING; |
| 5475 | break; |
| 5476 | case ATA_PROT_ATAPI_DMA: |
| 5477 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) |
Albert Lee | 3a77827 | 2006-06-22 13:00:25 +0800 | [diff] [blame] | 5478 | /* see ata_dma_blacklisted() */ |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 5479 | BUG(); |
| 5480 | break; |
| 5481 | default: |
| 5482 | break; |
| 5483 | } |
| 5484 | } |
| 5485 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5486 | /* select the device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5487 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
| 5488 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5489 | /* start the command */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5490 | switch (qc->tf.protocol) { |
| 5491 | case ATA_PROT_NODATA: |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5492 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 5493 | ata_qc_set_polling(qc); |
| 5494 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 5495 | ata_tf_to_host(ap, &qc->tf); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5496 | ap->hsm_task_state = HSM_ST_LAST; |
| 5497 | |
| 5498 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5499 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5501 | break; |
| 5502 | |
| 5503 | case ATA_PROT_DMA: |
Jeff Garzik | 587005d | 2006-02-11 18:17:32 -0500 | [diff] [blame] | 5504 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5506 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 5507 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 5508 | ap->ops->bmdma_start(qc); /* initiate bmdma */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5509 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5510 | break; |
| 5511 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5512 | case ATA_PROT_PIO: |
| 5513 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 5514 | ata_qc_set_polling(qc); |
| 5515 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 5516 | ata_tf_to_host(ap, &qc->tf); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5517 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5518 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 5519 | /* PIO data out protocol */ |
| 5520 | ap->hsm_task_state = HSM_ST_FIRST; |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5521 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5522 | |
| 5523 | /* always send first data block using |
Albert Lee | e27486d | 2005-11-01 19:24:49 +0800 | [diff] [blame] | 5524 | * the ata_pio_task() codepath. |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5525 | */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5526 | } else { |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5527 | /* PIO data in protocol */ |
| 5528 | ap->hsm_task_state = HSM_ST; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5529 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5530 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5531 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5532 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5533 | /* if polling, ata_pio_task() handles the rest. |
| 5534 | * otherwise, interrupt handler takes over from here. |
| 5535 | */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5536 | } |
| 5537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5538 | break; |
| 5539 | |
| 5540 | case ATA_PROT_ATAPI: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5541 | case ATA_PROT_ATAPI_NODATA: |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5542 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 5543 | ata_qc_set_polling(qc); |
| 5544 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 5545 | ata_tf_to_host(ap, &qc->tf); |
Jeff Garzik | f6ef65e | 2006-01-27 02:45:00 -0500 | [diff] [blame] | 5546 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5547 | ap->hsm_task_state = HSM_ST_FIRST; |
| 5548 | |
| 5549 | /* send cdb by polling if no cdb interrupt */ |
| 5550 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || |
| 5551 | (qc->tf.flags & ATA_TFLAG_POLLING)) |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5552 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5553 | break; |
| 5554 | |
| 5555 | case ATA_PROT_ATAPI_DMA: |
Jeff Garzik | 587005d | 2006-02-11 18:17:32 -0500 | [diff] [blame] | 5556 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5558 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 5559 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5560 | ap->hsm_task_state = HSM_ST_FIRST; |
| 5561 | |
| 5562 | /* send cdb by polling if no cdb interrupt */ |
| 5563 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5564 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5565 | break; |
| 5566 | |
| 5567 | default: |
| 5568 | WARN_ON(1); |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5569 | return AC_ERR_SYSTEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5570 | } |
| 5571 | |
| 5572 | return 0; |
| 5573 | } |
| 5574 | |
| 5575 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5576 | * ata_host_intr - Handle host interrupt for given (port, task) |
| 5577 | * @ap: Port on which interrupt arrived (possibly...) |
| 5578 | * @qc: Taskfile currently active in engine |
| 5579 | * |
| 5580 | * Handle host interrupt for given queued command. Currently, |
| 5581 | * only DMA interrupts are handled. All other commands are |
| 5582 | * handled via polling with interrupts disabled (nIEN bit). |
| 5583 | * |
| 5584 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5585 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5586 | * |
| 5587 | * RETURNS: |
| 5588 | * One if interrupt was handled, zero if not (shared irq). |
| 5589 | */ |
| 5590 | |
| 5591 | inline unsigned int ata_host_intr (struct ata_port *ap, |
| 5592 | struct ata_queued_cmd *qc) |
| 5593 | { |
Tejun Heo | ea54763 | 2006-11-17 12:06:21 +0900 | [diff] [blame] | 5594 | struct ata_eh_info *ehi = &ap->eh_info; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5595 | u8 status, host_stat = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5596 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5597 | VPRINTK("ata%u: protocol %d task_state %d\n", |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5598 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5599 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5600 | /* Check whether we are expecting interrupt in this state */ |
| 5601 | switch (ap->hsm_task_state) { |
| 5602 | case HSM_ST_FIRST: |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 5603 | /* Some pre-ATAPI-4 devices assert INTRQ |
| 5604 | * at this state when ready to receive CDB. |
| 5605 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5606 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5607 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
| 5608 | * The flag was turned on only for atapi devices. |
| 5609 | * No need to check is_atapi_taskfile(&qc->tf) again. |
| 5610 | */ |
| 5611 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5612 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5613 | break; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5614 | case HSM_ST_LAST: |
| 5615 | if (qc->tf.protocol == ATA_PROT_DMA || |
| 5616 | qc->tf.protocol == ATA_PROT_ATAPI_DMA) { |
| 5617 | /* check status of DMA engine */ |
| 5618 | host_stat = ap->ops->bmdma_status(ap); |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5619 | VPRINTK("ata%u: host_stat 0x%X\n", |
| 5620 | ap->print_id, host_stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5621 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5622 | /* if it's not our irq... */ |
| 5623 | if (!(host_stat & ATA_DMA_INTR)) |
| 5624 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5625 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5626 | /* before we do anything else, clear DMA-Start bit */ |
| 5627 | ap->ops->bmdma_stop(qc); |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 5628 | |
| 5629 | if (unlikely(host_stat & ATA_DMA_ERR)) { |
| 5630 | /* error when transfering data to/from memory */ |
| 5631 | qc->err_mask |= AC_ERR_HOST_BUS; |
| 5632 | ap->hsm_task_state = HSM_ST_ERR; |
| 5633 | } |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5634 | } |
| 5635 | break; |
| 5636 | case HSM_ST: |
| 5637 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5638 | default: |
| 5639 | goto idle_irq; |
| 5640 | } |
| 5641 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5642 | /* check altstatus */ |
| 5643 | status = ata_altstatus(ap); |
| 5644 | if (status & ATA_BUSY) |
| 5645 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5646 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5647 | /* check main status, clearing INTRQ */ |
| 5648 | status = ata_chk_status(ap); |
| 5649 | if (unlikely(status & ATA_BUSY)) |
| 5650 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5651 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5652 | /* ack bmdma irq events */ |
| 5653 | ap->ops->irq_clear(ap); |
| 5654 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5655 | ata_hsm_move(ap, qc, status, 0); |
Tejun Heo | ea54763 | 2006-11-17 12:06:21 +0900 | [diff] [blame] | 5656 | |
| 5657 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || |
| 5658 | qc->tf.protocol == ATA_PROT_ATAPI_DMA)) |
| 5659 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); |
| 5660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5661 | return 1; /* irq handled */ |
| 5662 | |
| 5663 | idle_irq: |
| 5664 | ap->stats.idle_irq++; |
| 5665 | |
| 5666 | #ifdef ATA_IRQ_TRAP |
| 5667 | if ((ap->stats.idle_irq % 1000) == 0) { |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 5668 | ap->ops->irq_ack(ap, 0); /* debug trap */ |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 5669 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
Alan Cox | 23cfce8 | 2006-03-21 16:06:53 +0000 | [diff] [blame] | 5670 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5671 | } |
| 5672 | #endif |
| 5673 | return 0; /* irq not handled */ |
| 5674 | } |
| 5675 | |
| 5676 | /** |
| 5677 | * ata_interrupt - Default ATA host interrupt handler |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5678 | * @irq: irq line (unused) |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5679 | * @dev_instance: pointer to our ata_host information structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5680 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5681 | * Default interrupt handler for PCI IDE devices. Calls |
| 5682 | * ata_host_intr() for each port that is not disabled. |
| 5683 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5684 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5685 | * Obtains host lock during operation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5686 | * |
| 5687 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5688 | * IRQ_NONE or IRQ_HANDLED. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5689 | */ |
| 5690 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 5691 | irqreturn_t ata_interrupt (int irq, void *dev_instance) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5692 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5693 | struct ata_host *host = dev_instance; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5694 | unsigned int i; |
| 5695 | unsigned int handled = 0; |
| 5696 | unsigned long flags; |
| 5697 | |
| 5698 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5699 | spin_lock_irqsave(&host->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5700 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5701 | for (i = 0; i < host->n_ports; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5702 | struct ata_port *ap; |
| 5703 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5704 | ap = host->ports[i]; |
Tejun Heo | c138950 | 2005-08-22 14:59:24 +0900 | [diff] [blame] | 5705 | if (ap && |
Jeff Garzik | 029f546 | 2006-04-02 10:30:40 -0400 | [diff] [blame] | 5706 | !(ap->flags & ATA_FLAG_DISABLED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5707 | struct ata_queued_cmd *qc; |
| 5708 | |
| 5709 | qc = ata_qc_from_tag(ap, ap->active_tag); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5710 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
Albert Lee | 21b1ed7 | 2005-04-29 17:34:59 +0800 | [diff] [blame] | 5711 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5712 | handled |= ata_host_intr(ap, qc); |
| 5713 | } |
| 5714 | } |
| 5715 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5716 | spin_unlock_irqrestore(&host->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5717 | |
| 5718 | return IRQ_RETVAL(handled); |
| 5719 | } |
| 5720 | |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 5721 | /** |
| 5722 | * sata_scr_valid - test whether SCRs are accessible |
| 5723 | * @ap: ATA port to test SCR accessibility for |
| 5724 | * |
| 5725 | * Test whether SCRs are accessible for @ap. |
| 5726 | * |
| 5727 | * LOCKING: |
| 5728 | * None. |
| 5729 | * |
| 5730 | * RETURNS: |
| 5731 | * 1 if SCRs are accessible, 0 otherwise. |
| 5732 | */ |
| 5733 | int sata_scr_valid(struct ata_port *ap) |
| 5734 | { |
Tejun Heo | a16abc0 | 2007-05-21 18:33:47 +0200 | [diff] [blame] | 5735 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 5736 | } |
| 5737 | |
| 5738 | /** |
| 5739 | * sata_scr_read - read SCR register of the specified port |
| 5740 | * @ap: ATA port to read SCR for |
| 5741 | * @reg: SCR to read |
| 5742 | * @val: Place to store read value |
| 5743 | * |
| 5744 | * Read SCR register @reg of @ap into *@val. This function is |
| 5745 | * guaranteed to succeed if the cable type of the port is SATA |
| 5746 | * and the port implements ->scr_read. |
| 5747 | * |
| 5748 | * LOCKING: |
| 5749 | * None. |
| 5750 | * |
| 5751 | * RETURNS: |
| 5752 | * 0 on success, negative errno on failure. |
| 5753 | */ |
| 5754 | int sata_scr_read(struct ata_port *ap, int reg, u32 *val) |
| 5755 | { |
Tejun Heo | da3dbb1 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 5756 | if (sata_scr_valid(ap)) |
| 5757 | return ap->ops->scr_read(ap, reg, val); |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 5758 | return -EOPNOTSUPP; |
| 5759 | } |
| 5760 | |
| 5761 | /** |
| 5762 | * sata_scr_write - write SCR register of the specified port |
| 5763 | * @ap: ATA port to write SCR for |
| 5764 | * @reg: SCR to write |
| 5765 | * @val: value to write |
| 5766 | * |
| 5767 | * Write @val to SCR register @reg of @ap. This function is |
| 5768 | * guaranteed to succeed if the cable type of the port is SATA |
| 5769 | * and the port implements ->scr_read. |
| 5770 | * |
| 5771 | * LOCKING: |
| 5772 | * None. |
| 5773 | * |
| 5774 | * RETURNS: |
| 5775 | * 0 on success, negative errno on failure. |
| 5776 | */ |
| 5777 | int sata_scr_write(struct ata_port *ap, int reg, u32 val) |
| 5778 | { |
Tejun Heo | da3dbb1 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 5779 | if (sata_scr_valid(ap)) |
| 5780 | return ap->ops->scr_write(ap, reg, val); |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 5781 | return -EOPNOTSUPP; |
| 5782 | } |
| 5783 | |
| 5784 | /** |
| 5785 | * sata_scr_write_flush - write SCR register of the specified port and flush |
| 5786 | * @ap: ATA port to write SCR for |
| 5787 | * @reg: SCR to write |
| 5788 | * @val: value to write |
| 5789 | * |
| 5790 | * This function is identical to sata_scr_write() except that this |
| 5791 | * function performs flush after writing to the register. |
| 5792 | * |
| 5793 | * LOCKING: |
| 5794 | * None. |
| 5795 | * |
| 5796 | * RETURNS: |
| 5797 | * 0 on success, negative errno on failure. |
| 5798 | */ |
| 5799 | int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) |
| 5800 | { |
Tejun Heo | da3dbb1 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 5801 | int rc; |
| 5802 | |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 5803 | if (sata_scr_valid(ap)) { |
Tejun Heo | da3dbb1 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 5804 | rc = ap->ops->scr_write(ap, reg, val); |
| 5805 | if (rc == 0) |
| 5806 | rc = ap->ops->scr_read(ap, reg, &val); |
| 5807 | return rc; |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 5808 | } |
| 5809 | return -EOPNOTSUPP; |
| 5810 | } |
| 5811 | |
| 5812 | /** |
| 5813 | * ata_port_online - test whether the given port is online |
| 5814 | * @ap: ATA port to test |
| 5815 | * |
| 5816 | * Test whether @ap is online. Note that this function returns 0 |
| 5817 | * if online status of @ap cannot be obtained, so |
| 5818 | * ata_port_online(ap) != !ata_port_offline(ap). |
| 5819 | * |
| 5820 | * LOCKING: |
| 5821 | * None. |
| 5822 | * |
| 5823 | * RETURNS: |
| 5824 | * 1 if the port online status is available and online. |
| 5825 | */ |
| 5826 | int ata_port_online(struct ata_port *ap) |
| 5827 | { |
| 5828 | u32 sstatus; |
| 5829 | |
| 5830 | if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) |
| 5831 | return 1; |
| 5832 | return 0; |
| 5833 | } |
| 5834 | |
| 5835 | /** |
| 5836 | * ata_port_offline - test whether the given port is offline |
| 5837 | * @ap: ATA port to test |
| 5838 | * |
| 5839 | * Test whether @ap is offline. Note that this function returns |
| 5840 | * 0 if offline status of @ap cannot be obtained, so |
| 5841 | * ata_port_online(ap) != !ata_port_offline(ap). |
| 5842 | * |
| 5843 | * LOCKING: |
| 5844 | * None. |
| 5845 | * |
| 5846 | * RETURNS: |
| 5847 | * 1 if the port offline status is available and offline. |
| 5848 | */ |
| 5849 | int ata_port_offline(struct ata_port *ap) |
| 5850 | { |
| 5851 | u32 sstatus; |
| 5852 | |
| 5853 | if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) |
| 5854 | return 1; |
| 5855 | return 0; |
| 5856 | } |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 5857 | |
Tejun Heo | 77b08fb | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 5858 | int ata_flush_cache(struct ata_device *dev) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5859 | { |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 5860 | unsigned int err_mask; |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5861 | u8 cmd; |
| 5862 | |
| 5863 | if (!ata_try_flush_cache(dev)) |
| 5864 | return 0; |
| 5865 | |
Tejun Heo | 6fc49ad | 2006-11-11 20:10:45 +0900 | [diff] [blame] | 5866 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5867 | cmd = ATA_CMD_FLUSH_EXT; |
| 5868 | else |
| 5869 | cmd = ATA_CMD_FLUSH; |
| 5870 | |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 5871 | err_mask = ata_do_simple_cmd(dev, cmd); |
| 5872 | if (err_mask) { |
| 5873 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); |
| 5874 | return -EIO; |
| 5875 | } |
| 5876 | |
| 5877 | return 0; |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5878 | } |
| 5879 | |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 5880 | #ifdef CONFIG_PM |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5881 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
| 5882 | unsigned int action, unsigned int ehi_flags, |
| 5883 | int wait) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5884 | { |
| 5885 | unsigned long flags; |
| 5886 | int i, rc; |
| 5887 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5888 | for (i = 0; i < host->n_ports; i++) { |
| 5889 | struct ata_port *ap = host->ports[i]; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5890 | |
| 5891 | /* Previous resume operation might still be in |
| 5892 | * progress. Wait for PM_PENDING to clear. |
| 5893 | */ |
| 5894 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { |
| 5895 | ata_port_wait_eh(ap); |
| 5896 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); |
| 5897 | } |
| 5898 | |
| 5899 | /* request PM ops to EH */ |
| 5900 | spin_lock_irqsave(ap->lock, flags); |
| 5901 | |
| 5902 | ap->pm_mesg = mesg; |
| 5903 | if (wait) { |
| 5904 | rc = 0; |
| 5905 | ap->pm_result = &rc; |
| 5906 | } |
| 5907 | |
| 5908 | ap->pflags |= ATA_PFLAG_PM_PENDING; |
| 5909 | ap->eh_info.action |= action; |
| 5910 | ap->eh_info.flags |= ehi_flags; |
| 5911 | |
| 5912 | ata_port_schedule_eh(ap); |
| 5913 | |
| 5914 | spin_unlock_irqrestore(ap->lock, flags); |
| 5915 | |
| 5916 | /* wait and check result */ |
| 5917 | if (wait) { |
| 5918 | ata_port_wait_eh(ap); |
| 5919 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); |
| 5920 | if (rc) |
| 5921 | return rc; |
| 5922 | } |
| 5923 | } |
| 5924 | |
| 5925 | return 0; |
| 5926 | } |
| 5927 | |
| 5928 | /** |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5929 | * ata_host_suspend - suspend host |
| 5930 | * @host: host to suspend |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5931 | * @mesg: PM message |
| 5932 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5933 | * Suspend @host. Actual operation is performed by EH. This |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5934 | * function requests EH to perform PM operations and waits for EH |
| 5935 | * to finish. |
| 5936 | * |
| 5937 | * LOCKING: |
| 5938 | * Kernel thread context (may sleep). |
| 5939 | * |
| 5940 | * RETURNS: |
| 5941 | * 0 on success, -errno on failure. |
| 5942 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5943 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5944 | { |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 5945 | int rc; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5946 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5947 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 5948 | if (rc == 0) |
| 5949 | host->dev->power.power_state = mesg; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5950 | return rc; |
| 5951 | } |
| 5952 | |
| 5953 | /** |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5954 | * ata_host_resume - resume host |
| 5955 | * @host: host to resume |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5956 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5957 | * Resume @host. Actual operation is performed by EH. This |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5958 | * function requests EH to perform PM operations and returns. |
| 5959 | * Note that all resume operations are performed parallely. |
| 5960 | * |
| 5961 | * LOCKING: |
| 5962 | * Kernel thread context (may sleep). |
| 5963 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5964 | void ata_host_resume(struct ata_host *host) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5965 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5966 | ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, |
| 5967 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); |
| 5968 | host->dev->power.power_state = PMSG_ON; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5969 | } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 5970 | #endif |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5971 | |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 5972 | /** |
| 5973 | * ata_port_start - Set port up for dma. |
| 5974 | * @ap: Port to initialize |
| 5975 | * |
| 5976 | * Called just after data structures for each port are |
| 5977 | * initialized. Allocates space for PRD table. |
| 5978 | * |
| 5979 | * May be used as the port_start() entry in ata_port_operations. |
| 5980 | * |
| 5981 | * LOCKING: |
| 5982 | * Inherited from caller. |
| 5983 | */ |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5984 | int ata_port_start(struct ata_port *ap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5985 | { |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 5986 | struct device *dev = ap->dev; |
Jeff Garzik | 6037d6b | 2005-11-04 22:08:00 -0500 | [diff] [blame] | 5987 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5988 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5989 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
| 5990 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5991 | if (!ap->prd) |
| 5992 | return -ENOMEM; |
| 5993 | |
Jeff Garzik | 6037d6b | 2005-11-04 22:08:00 -0500 | [diff] [blame] | 5994 | rc = ata_pad_alloc(ap, dev); |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5995 | if (rc) |
Jeff Garzik | 6037d6b | 2005-11-04 22:08:00 -0500 | [diff] [blame] | 5996 | return rc; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 5997 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5998 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, |
| 5999 | (unsigned long long)ap->prd_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6000 | return 0; |
| 6001 | } |
| 6002 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6003 | /** |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 6004 | * ata_dev_init - Initialize an ata_device structure |
| 6005 | * @dev: Device structure to initialize |
| 6006 | * |
| 6007 | * Initialize @dev in preparation for probing. |
| 6008 | * |
| 6009 | * LOCKING: |
| 6010 | * Inherited from caller. |
| 6011 | */ |
| 6012 | void ata_dev_init(struct ata_device *dev) |
| 6013 | { |
| 6014 | struct ata_port *ap = dev->ap; |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6015 | unsigned long flags; |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 6016 | |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 6017 | /* SATA spd limit is bound to the first device */ |
| 6018 | ap->sata_spd_limit = ap->hw_sata_spd_limit; |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 6019 | ap->sata_spd = 0; |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 6020 | |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6021 | /* High bits of dev->flags are used to record warm plug |
| 6022 | * requests which occur asynchronously. Synchronize using |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6023 | * host lock. |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6024 | */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6025 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6026 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6027 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6028 | |
| 6029 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
| 6030 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 6031 | dev->pio_mask = UINT_MAX; |
| 6032 | dev->mwdma_mask = UINT_MAX; |
| 6033 | dev->udma_mask = UINT_MAX; |
| 6034 | } |
| 6035 | |
| 6036 | /** |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6037 | * ata_port_alloc - allocate and initialize basic ATA port resources |
| 6038 | * @host: ATA host this allocated port belongs to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6039 | * |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6040 | * Allocate and initialize basic ATA port resources. |
| 6041 | * |
| 6042 | * RETURNS: |
| 6043 | * Allocate ATA port on success, NULL on failure. |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 6044 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6045 | * LOCKING: |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6046 | * Inherited from calling layer (may sleep). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6047 | */ |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6048 | struct ata_port *ata_port_alloc(struct ata_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6049 | { |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6050 | struct ata_port *ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6051 | unsigned int i; |
| 6052 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6053 | DPRINTK("ENTER\n"); |
| 6054 | |
| 6055 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); |
| 6056 | if (!ap) |
| 6057 | return NULL; |
| 6058 | |
Tejun Heo | f4d6d00 | 2007-05-01 11:50:15 +0200 | [diff] [blame] | 6059 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6060 | ap->lock = &host->lock; |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 6061 | ap->flags = ATA_FLAG_DISABLED; |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6062 | ap->print_id = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6063 | ap->ctl = ATA_DEVCTL_OBS; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6064 | ap->host = host; |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6065 | ap->dev = host->dev; |
| 6066 | |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 6067 | ap->hw_sata_spd_limit = UINT_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6068 | ap->active_tag = ATA_TAG_POISON; |
| 6069 | ap->last_ctl = 0xFF; |
Borislav Petkov | bd5d825 | 2006-06-11 23:17:01 -0400 | [diff] [blame] | 6070 | |
| 6071 | #if defined(ATA_VERBOSE_DEBUG) |
| 6072 | /* turn on all debugging levels */ |
| 6073 | ap->msg_enable = 0x00FF; |
| 6074 | #elif defined(ATA_DEBUG) |
| 6075 | 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] | 6076 | #else |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 6077 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
Borislav Petkov | bd5d825 | 2006-06-11 23:17:01 -0400 | [diff] [blame] | 6078 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6079 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 6080 | INIT_DELAYED_WORK(&ap->port_task, NULL); |
| 6081 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
| 6082 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); |
Tejun Heo | a72ec4c | 2006-01-23 13:09:37 +0900 | [diff] [blame] | 6083 | INIT_LIST_HEAD(&ap->eh_done_q); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 6084 | init_waitqueue_head(&ap->eh_wait_q); |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 6085 | init_timer_deferrable(&ap->fastdrain_timer); |
| 6086 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; |
| 6087 | ap->fastdrain_timer.data = (unsigned long)ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6088 | |
Tejun Heo | 838df62 | 2006-05-15 20:57:44 +0900 | [diff] [blame] | 6089 | ap->cbl = ATA_CBL_NONE; |
Tejun Heo | 838df62 | 2006-05-15 20:57:44 +0900 | [diff] [blame] | 6090 | |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 6091 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 6092 | struct ata_device *dev = &ap->device[i]; |
Tejun Heo | 38d8723 | 2006-05-15 20:57:51 +0900 | [diff] [blame] | 6093 | dev->ap = ap; |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 6094 | dev->devno = i; |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 6095 | ata_dev_init(dev); |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 6096 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6097 | |
| 6098 | #ifdef ATA_IRQ_TRAP |
| 6099 | ap->stats.unhandled_irq = 1; |
| 6100 | ap->stats.idle_irq = 1; |
| 6101 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6102 | return ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6103 | } |
| 6104 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6105 | static void ata_host_release(struct device *gendev, void *res) |
| 6106 | { |
| 6107 | struct ata_host *host = dev_get_drvdata(gendev); |
| 6108 | int i; |
| 6109 | |
| 6110 | for (i = 0; i < host->n_ports; i++) { |
| 6111 | struct ata_port *ap = host->ports[i]; |
| 6112 | |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6113 | if (!ap) |
| 6114 | continue; |
| 6115 | |
| 6116 | if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop) |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6117 | ap->ops->port_stop(ap); |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6118 | } |
| 6119 | |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6120 | if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop) |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6121 | host->ops->host_stop(host); |
Tejun Heo | 1aa56cc | 2007-02-27 22:33:21 +0900 | [diff] [blame] | 6122 | |
Tejun Heo | 1aa506e | 2007-03-09 19:36:12 +0900 | [diff] [blame] | 6123 | for (i = 0; i < host->n_ports; i++) { |
| 6124 | struct ata_port *ap = host->ports[i]; |
| 6125 | |
Tejun Heo | 4911487 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6126 | if (!ap) |
| 6127 | continue; |
| 6128 | |
| 6129 | if (ap->scsi_host) |
Tejun Heo | 1aa506e | 2007-03-09 19:36:12 +0900 | [diff] [blame] | 6130 | scsi_host_put(ap->scsi_host); |
| 6131 | |
Tejun Heo | 4911487 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6132 | kfree(ap); |
Tejun Heo | 1aa506e | 2007-03-09 19:36:12 +0900 | [diff] [blame] | 6133 | host->ports[i] = NULL; |
| 6134 | } |
| 6135 | |
Tejun Heo | 1aa56cc | 2007-02-27 22:33:21 +0900 | [diff] [blame] | 6136 | dev_set_drvdata(gendev, NULL); |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6137 | } |
| 6138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6139 | /** |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6140 | * ata_host_alloc - allocate and init basic ATA host resources |
| 6141 | * @dev: generic device this host is associated with |
| 6142 | * @max_ports: maximum number of ATA ports associated with this host |
| 6143 | * |
| 6144 | * Allocate and initialize basic ATA host resources. LLD calls |
| 6145 | * this function to allocate a host, initializes it fully and |
| 6146 | * attaches it using ata_host_register(). |
| 6147 | * |
| 6148 | * @max_ports ports are allocated and host->n_ports is |
| 6149 | * initialized to @max_ports. The caller is allowed to decrease |
| 6150 | * host->n_ports before calling ata_host_register(). The unused |
| 6151 | * ports will be automatically freed on registration. |
| 6152 | * |
| 6153 | * RETURNS: |
| 6154 | * Allocate ATA host on success, NULL on failure. |
| 6155 | * |
| 6156 | * LOCKING: |
| 6157 | * Inherited from calling layer (may sleep). |
| 6158 | */ |
| 6159 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) |
| 6160 | { |
| 6161 | struct ata_host *host; |
| 6162 | size_t sz; |
| 6163 | int i; |
| 6164 | |
| 6165 | DPRINTK("ENTER\n"); |
| 6166 | |
| 6167 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
| 6168 | return NULL; |
| 6169 | |
| 6170 | /* alloc a container for our list of ATA ports (buses) */ |
| 6171 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); |
| 6172 | /* alloc a container for our list of ATA ports (buses) */ |
| 6173 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); |
| 6174 | if (!host) |
| 6175 | goto err_out; |
| 6176 | |
| 6177 | devres_add(dev, host); |
| 6178 | dev_set_drvdata(dev, host); |
| 6179 | |
| 6180 | spin_lock_init(&host->lock); |
| 6181 | host->dev = dev; |
| 6182 | host->n_ports = max_ports; |
| 6183 | |
| 6184 | /* allocate ports bound to this host */ |
| 6185 | for (i = 0; i < max_ports; i++) { |
| 6186 | struct ata_port *ap; |
| 6187 | |
| 6188 | ap = ata_port_alloc(host); |
| 6189 | if (!ap) |
| 6190 | goto err_out; |
| 6191 | |
| 6192 | ap->port_no = i; |
| 6193 | host->ports[i] = ap; |
| 6194 | } |
| 6195 | |
| 6196 | devres_remove_group(dev, NULL); |
| 6197 | return host; |
| 6198 | |
| 6199 | err_out: |
| 6200 | devres_release_group(dev, NULL); |
| 6201 | return NULL; |
| 6202 | } |
| 6203 | |
| 6204 | /** |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6205 | * ata_host_alloc_pinfo - alloc host and init with port_info array |
| 6206 | * @dev: generic device this host is associated with |
| 6207 | * @ppi: array of ATA port_info to initialize host with |
| 6208 | * @n_ports: number of ATA ports attached to this host |
| 6209 | * |
| 6210 | * Allocate ATA host and initialize with info from @ppi. If NULL |
| 6211 | * terminated, @ppi may contain fewer entries than @n_ports. The |
| 6212 | * last entry will be used for the remaining ports. |
| 6213 | * |
| 6214 | * RETURNS: |
| 6215 | * Allocate ATA host on success, NULL on failure. |
| 6216 | * |
| 6217 | * LOCKING: |
| 6218 | * Inherited from calling layer (may sleep). |
| 6219 | */ |
| 6220 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, |
| 6221 | const struct ata_port_info * const * ppi, |
| 6222 | int n_ports) |
| 6223 | { |
| 6224 | const struct ata_port_info *pi; |
| 6225 | struct ata_host *host; |
| 6226 | int i, j; |
| 6227 | |
| 6228 | host = ata_host_alloc(dev, n_ports); |
| 6229 | if (!host) |
| 6230 | return NULL; |
| 6231 | |
| 6232 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { |
| 6233 | struct ata_port *ap = host->ports[i]; |
| 6234 | |
| 6235 | if (ppi[j]) |
| 6236 | pi = ppi[j++]; |
| 6237 | |
| 6238 | ap->pio_mask = pi->pio_mask; |
| 6239 | ap->mwdma_mask = pi->mwdma_mask; |
| 6240 | ap->udma_mask = pi->udma_mask; |
| 6241 | ap->flags |= pi->flags; |
| 6242 | ap->ops = pi->port_ops; |
| 6243 | |
| 6244 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) |
| 6245 | host->ops = pi->port_ops; |
| 6246 | if (!host->private_data && pi->private_data) |
| 6247 | host->private_data = pi->private_data; |
| 6248 | } |
| 6249 | |
| 6250 | return host; |
| 6251 | } |
| 6252 | |
| 6253 | /** |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6254 | * ata_host_start - start and freeze ports of an ATA host |
| 6255 | * @host: ATA host to start ports for |
| 6256 | * |
| 6257 | * Start and then freeze ports of @host. Started status is |
| 6258 | * recorded in host->flags, so this function can be called |
| 6259 | * multiple times. Ports are guaranteed to get started only |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6260 | * once. If host->ops isn't initialized yet, its set to the |
| 6261 | * first non-dummy port ops. |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6262 | * |
| 6263 | * LOCKING: |
| 6264 | * Inherited from calling layer (may sleep). |
| 6265 | * |
| 6266 | * RETURNS: |
| 6267 | * 0 if all ports are started successfully, -errno otherwise. |
| 6268 | */ |
| 6269 | int ata_host_start(struct ata_host *host) |
| 6270 | { |
| 6271 | int i, rc; |
| 6272 | |
| 6273 | if (host->flags & ATA_HOST_STARTED) |
| 6274 | return 0; |
| 6275 | |
| 6276 | for (i = 0; i < host->n_ports; i++) { |
| 6277 | struct ata_port *ap = host->ports[i]; |
| 6278 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6279 | if (!host->ops && !ata_port_is_dummy(ap)) |
| 6280 | host->ops = ap->ops; |
| 6281 | |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6282 | if (ap->ops->port_start) { |
| 6283 | rc = ap->ops->port_start(ap); |
| 6284 | if (rc) { |
| 6285 | ata_port_printk(ap, KERN_ERR, "failed to " |
| 6286 | "start port (errno=%d)\n", rc); |
| 6287 | goto err_out; |
| 6288 | } |
| 6289 | } |
| 6290 | |
| 6291 | ata_eh_freeze_port(ap); |
| 6292 | } |
| 6293 | |
| 6294 | host->flags |= ATA_HOST_STARTED; |
| 6295 | return 0; |
| 6296 | |
| 6297 | err_out: |
| 6298 | while (--i >= 0) { |
| 6299 | struct ata_port *ap = host->ports[i]; |
| 6300 | |
| 6301 | if (ap->ops->port_stop) |
| 6302 | ap->ops->port_stop(ap); |
| 6303 | } |
| 6304 | return rc; |
| 6305 | } |
| 6306 | |
| 6307 | /** |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6308 | * ata_sas_host_init - Initialize a host struct |
| 6309 | * @host: host to initialize |
| 6310 | * @dev: device host is attached to |
| 6311 | * @flags: host flags |
| 6312 | * @ops: port_ops |
Brian King | b03732f | 2006-08-07 14:27:10 -0500 | [diff] [blame] | 6313 | * |
| 6314 | * LOCKING: |
| 6315 | * PCI/etc. bus probe sem. |
| 6316 | * |
| 6317 | */ |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6318 | /* KILLME - the only user left is ipr */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6319 | void ata_host_init(struct ata_host *host, struct device *dev, |
| 6320 | unsigned long flags, const struct ata_port_operations *ops) |
Brian King | b03732f | 2006-08-07 14:27:10 -0500 | [diff] [blame] | 6321 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6322 | spin_lock_init(&host->lock); |
| 6323 | host->dev = dev; |
| 6324 | host->flags = flags; |
| 6325 | host->ops = ops; |
Brian King | b03732f | 2006-08-07 14:27:10 -0500 | [diff] [blame] | 6326 | } |
| 6327 | |
| 6328 | /** |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6329 | * ata_host_register - register initialized ATA host |
| 6330 | * @host: ATA host to register |
| 6331 | * @sht: template for SCSI host |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 6332 | * |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6333 | * Register initialized ATA host. @host is allocated using |
| 6334 | * ata_host_alloc() and fully initialized by LLD. This function |
| 6335 | * starts ports, registers @host with ATA and SCSI layers and |
| 6336 | * probe registered devices. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6337 | * |
| 6338 | * LOCKING: |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6339 | * Inherited from calling layer (may sleep). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6340 | * |
| 6341 | * RETURNS: |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6342 | * 0 on success, -errno otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6343 | */ |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6344 | 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] | 6345 | { |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6346 | int i, rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6347 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6348 | /* host must have been started */ |
| 6349 | if (!(host->flags & ATA_HOST_STARTED)) { |
| 6350 | dev_printk(KERN_ERR, host->dev, |
| 6351 | "BUG: trying to register unstarted host\n"); |
| 6352 | WARN_ON(1); |
| 6353 | return -EINVAL; |
Alan Cox | 02f076a | 2006-09-26 17:35:32 +0100 | [diff] [blame] | 6354 | } |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6355 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6356 | /* Blow away unused ports. This happens when LLD can't |
| 6357 | * determine the exact number of ports to allocate at |
| 6358 | * allocation time. |
| 6359 | */ |
| 6360 | for (i = host->n_ports; host->ports[i]; i++) |
| 6361 | kfree(host->ports[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6362 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6363 | /* give ports names and add SCSI hosts */ |
| 6364 | for (i = 0; i < host->n_ports; i++) |
| 6365 | host->ports[i]->print_id = ata_print_id++; |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6366 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6367 | rc = ata_scsi_add_hosts(host, sht); |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6368 | if (rc) |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6369 | return rc; |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6370 | |
Tejun Heo | fafbae8 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 6371 | /* associate with ACPI nodes */ |
| 6372 | ata_acpi_associate(host); |
| 6373 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6374 | /* set cable, sata_spd_limit and report */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6375 | for (i = 0; i < host->n_ports; i++) { |
| 6376 | struct ata_port *ap = host->ports[i]; |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6377 | int irq_line; |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 6378 | u32 scontrol; |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6379 | unsigned long xfer_mask; |
| 6380 | |
| 6381 | /* set SATA cable type if still unset */ |
| 6382 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) |
| 6383 | ap->cbl = ATA_CBL_SATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6384 | |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 6385 | /* init sata_spd_limit to the current value */ |
| 6386 | if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { |
| 6387 | int spd = (scontrol >> 4) & 0xf; |
Tejun Heo | afe3cc5 | 2007-06-06 16:35:55 +0900 | [diff] [blame] | 6388 | if (spd) |
| 6389 | ap->hw_sata_spd_limit &= (1 << spd) - 1; |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 6390 | } |
| 6391 | ap->sata_spd_limit = ap->hw_sata_spd_limit; |
| 6392 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6393 | /* report the secondary IRQ for second channel legacy */ |
| 6394 | irq_line = host->irq; |
| 6395 | if (i == 1 && host->irq2) |
| 6396 | irq_line = host->irq2; |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6397 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6398 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
| 6399 | ap->udma_mask); |
| 6400 | |
| 6401 | /* print per-port info to dmesg */ |
| 6402 | if (!ata_port_is_dummy(ap)) |
| 6403 | ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " |
| 6404 | "ctl 0x%p bmdma 0x%p irq %d\n", |
Tejun Heo | a16abc0 | 2007-05-21 18:33:47 +0200 | [diff] [blame] | 6405 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6406 | ata_mode_string(xfer_mask), |
| 6407 | ap->ioaddr.cmd_addr, |
| 6408 | ap->ioaddr.ctl_addr, |
| 6409 | ap->ioaddr.bmdma_addr, |
| 6410 | irq_line); |
| 6411 | else |
| 6412 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
| 6413 | } |
| 6414 | |
| 6415 | /* perform each probe synchronously */ |
| 6416 | DPRINTK("probe begin\n"); |
| 6417 | for (i = 0; i < host->n_ports; i++) { |
| 6418 | struct ata_port *ap = host->ports[i]; |
| 6419 | int rc; |
| 6420 | |
| 6421 | /* probe */ |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 6422 | if (ap->ops->error_handler) { |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 6423 | struct ata_eh_info *ehi = &ap->eh_info; |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6424 | unsigned long flags; |
| 6425 | |
| 6426 | ata_port_probe(ap); |
| 6427 | |
| 6428 | /* kick EH for boot probing */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6429 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6430 | |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 6431 | ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; |
| 6432 | ehi->action |= ATA_EH_SOFTRESET; |
| 6433 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6434 | |
Tejun Heo | f4d6d00 | 2007-05-01 11:50:15 +0200 | [diff] [blame] | 6435 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 6436 | ap->pflags |= ATA_PFLAG_LOADING; |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6437 | ata_port_schedule_eh(ap); |
| 6438 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6439 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6440 | |
| 6441 | /* wait for EH to finish */ |
| 6442 | ata_port_wait_eh(ap); |
| 6443 | } else { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 6444 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6445 | rc = ata_bus_probe(ap); |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 6446 | DPRINTK("ata%u: bus probe end\n", ap->print_id); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6447 | |
| 6448 | if (rc) { |
| 6449 | /* FIXME: do something useful here? |
| 6450 | * Current libata behavior will |
| 6451 | * tear down everything when |
| 6452 | * the module is removed |
| 6453 | * or the h/w is unplugged. |
| 6454 | */ |
| 6455 | } |
| 6456 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6457 | } |
| 6458 | |
| 6459 | /* probes are done, now scan each port's disk(s) */ |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 6460 | DPRINTK("host probe begin\n"); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6461 | for (i = 0; i < host->n_ports; i++) { |
| 6462 | struct ata_port *ap = host->ports[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6463 | |
Tejun Heo | 1ae4631 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 6464 | ata_scsi_scan_host(ap, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6465 | } |
| 6466 | |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6467 | return 0; |
| 6468 | } |
| 6469 | |
| 6470 | /** |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6471 | * ata_host_activate - start host, request IRQ and register it |
| 6472 | * @host: target ATA host |
| 6473 | * @irq: IRQ to request |
| 6474 | * @irq_handler: irq_handler used when requesting IRQ |
| 6475 | * @irq_flags: irq_flags used when requesting IRQ |
| 6476 | * @sht: scsi_host_template to use when registering the host |
| 6477 | * |
| 6478 | * After allocating an ATA host and initializing it, most libata |
| 6479 | * LLDs perform three steps to activate the host - start host, |
| 6480 | * request IRQ and register it. This helper takes necessasry |
| 6481 | * arguments and performs the three steps in one go. |
| 6482 | * |
| 6483 | * LOCKING: |
| 6484 | * Inherited from calling layer (may sleep). |
| 6485 | * |
| 6486 | * RETURNS: |
| 6487 | * 0 on success, -errno otherwise. |
| 6488 | */ |
| 6489 | int ata_host_activate(struct ata_host *host, int irq, |
| 6490 | irq_handler_t irq_handler, unsigned long irq_flags, |
| 6491 | struct scsi_host_template *sht) |
| 6492 | { |
| 6493 | int rc; |
| 6494 | |
| 6495 | rc = ata_host_start(host); |
| 6496 | if (rc) |
| 6497 | return rc; |
| 6498 | |
| 6499 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
| 6500 | dev_driver_string(host->dev), host); |
| 6501 | if (rc) |
| 6502 | return rc; |
| 6503 | |
Tejun Heo | 4031826 | 2007-07-03 01:38:47 +0900 | [diff] [blame] | 6504 | /* Used to print device info at probe */ |
| 6505 | host->irq = irq; |
| 6506 | |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6507 | rc = ata_host_register(host, sht); |
| 6508 | /* if failed, just free the IRQ and leave ports alone */ |
| 6509 | if (rc) |
| 6510 | devm_free_irq(host->dev, irq, host); |
| 6511 | |
| 6512 | return rc; |
| 6513 | } |
| 6514 | |
| 6515 | /** |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6516 | * ata_port_detach - Detach ATA port in prepration of device removal |
| 6517 | * @ap: ATA port to be detached |
| 6518 | * |
| 6519 | * Detach all ATA devices and the associated SCSI devices of @ap; |
| 6520 | * then, remove the associated SCSI host. @ap is guaranteed to |
| 6521 | * be quiescent on return from this function. |
| 6522 | * |
| 6523 | * LOCKING: |
| 6524 | * Kernel thread context (may sleep). |
| 6525 | */ |
| 6526 | void ata_port_detach(struct ata_port *ap) |
| 6527 | { |
| 6528 | unsigned long flags; |
| 6529 | int i; |
| 6530 | |
| 6531 | if (!ap->ops->error_handler) |
Tejun Heo | c3cf30a | 2006-08-05 03:59:11 +0900 | [diff] [blame] | 6532 | goto skip_eh; |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6533 | |
| 6534 | /* tell EH we're leaving & flush EH */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6535 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 6536 | ap->pflags |= ATA_PFLAG_UNLOADING; |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6537 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6538 | |
| 6539 | ata_port_wait_eh(ap); |
| 6540 | |
| 6541 | /* EH is now guaranteed to see UNLOADING, so no new device |
| 6542 | * will be attached. Disable all existing devices. |
| 6543 | */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6544 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6545 | |
| 6546 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 6547 | ata_dev_disable(&ap->device[i]); |
| 6548 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6549 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6550 | |
| 6551 | /* Final freeze & EH. All in-flight commands are aborted. EH |
| 6552 | * will be skipped and retrials will be terminated with bad |
| 6553 | * target. |
| 6554 | */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6555 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6556 | ata_port_freeze(ap); /* won't be thawed */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6557 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6558 | |
| 6559 | ata_port_wait_eh(ap); |
Oleg Nesterov | 45a66c1 | 2007-07-09 11:46:13 -0700 | [diff] [blame] | 6560 | cancel_rearming_delayed_work(&ap->hotplug_task); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6561 | |
Tejun Heo | c3cf30a | 2006-08-05 03:59:11 +0900 | [diff] [blame] | 6562 | skip_eh: |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6563 | /* remove the associated SCSI host */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6564 | scsi_remove_host(ap->scsi_host); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6565 | } |
| 6566 | |
| 6567 | /** |
Tejun Heo | 0529c15 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 6568 | * ata_host_detach - Detach all ports of an ATA host |
| 6569 | * @host: Host to detach |
| 6570 | * |
| 6571 | * Detach all ports of @host. |
| 6572 | * |
| 6573 | * LOCKING: |
| 6574 | * Kernel thread context (may sleep). |
| 6575 | */ |
| 6576 | void ata_host_detach(struct ata_host *host) |
| 6577 | { |
| 6578 | int i; |
| 6579 | |
| 6580 | for (i = 0; i < host->n_ports; i++) |
| 6581 | ata_port_detach(host->ports[i]); |
| 6582 | } |
| 6583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6584 | /** |
| 6585 | * ata_std_ports - initialize ioaddr with standard port offsets. |
| 6586 | * @ioaddr: IO address structure to be initialized |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6587 | * |
| 6588 | * Utility function which initializes data_addr, error_addr, |
| 6589 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, |
| 6590 | * device_addr, status_addr, and command_addr to standard offsets |
| 6591 | * relative to cmd_addr. |
| 6592 | * |
| 6593 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6594 | */ |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6595 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6596 | void ata_std_ports(struct ata_ioports *ioaddr) |
| 6597 | { |
| 6598 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; |
| 6599 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; |
| 6600 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; |
| 6601 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; |
| 6602 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; |
| 6603 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; |
| 6604 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; |
| 6605 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; |
| 6606 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; |
| 6607 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; |
| 6608 | } |
| 6609 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6610 | |
Jeff Garzik | 374b187 | 2005-08-30 05:42:52 -0400 | [diff] [blame] | 6611 | #ifdef CONFIG_PCI |
| 6612 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6613 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6614 | * ata_pci_remove_one - PCI layer callback for device removal |
| 6615 | * @pdev: PCI device that was removed |
| 6616 | * |
Tejun Heo | b878ca5 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6617 | * PCI layer indicates to libata via this hook that hot-unplug or |
| 6618 | * module unload event has occurred. Detach all ports. Resource |
| 6619 | * release is handled via devres. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6620 | * |
| 6621 | * LOCKING: |
| 6622 | * Inherited from PCI layer (may sleep). |
| 6623 | */ |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6624 | void ata_pci_remove_one(struct pci_dev *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6625 | { |
| 6626 | struct device *dev = pci_dev_to_dev(pdev); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6627 | struct ata_host *host = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6628 | |
Tejun Heo | b878ca5 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6629 | ata_host_detach(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6630 | } |
| 6631 | |
| 6632 | /* move to PCI subsystem */ |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 6633 | 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] | 6634 | { |
| 6635 | unsigned long tmp = 0; |
| 6636 | |
| 6637 | switch (bits->width) { |
| 6638 | case 1: { |
| 6639 | u8 tmp8 = 0; |
| 6640 | pci_read_config_byte(pdev, bits->reg, &tmp8); |
| 6641 | tmp = tmp8; |
| 6642 | break; |
| 6643 | } |
| 6644 | case 2: { |
| 6645 | u16 tmp16 = 0; |
| 6646 | pci_read_config_word(pdev, bits->reg, &tmp16); |
| 6647 | tmp = tmp16; |
| 6648 | break; |
| 6649 | } |
| 6650 | case 4: { |
| 6651 | u32 tmp32 = 0; |
| 6652 | pci_read_config_dword(pdev, bits->reg, &tmp32); |
| 6653 | tmp = tmp32; |
| 6654 | break; |
| 6655 | } |
| 6656 | |
| 6657 | default: |
| 6658 | return -EINVAL; |
| 6659 | } |
| 6660 | |
| 6661 | tmp &= bits->mask; |
| 6662 | |
| 6663 | return (tmp == bits->val) ? 1 : 0; |
| 6664 | } |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6665 | |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6666 | #ifdef CONFIG_PM |
Tejun Heo | 3c5100c | 2006-07-26 16:58:33 +0900 | [diff] [blame] | 6667 | 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] | 6668 | { |
| 6669 | pci_save_state(pdev); |
Tejun Heo | 4c90d97 | 2007-02-20 18:14:48 +0900 | [diff] [blame] | 6670 | pci_disable_device(pdev); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6671 | |
Tejun Heo | 4c90d97 | 2007-02-20 18:14:48 +0900 | [diff] [blame] | 6672 | if (mesg.event == PM_EVENT_SUSPEND) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6673 | pci_set_power_state(pdev, PCI_D3hot); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6674 | } |
| 6675 | |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6676 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6677 | { |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6678 | int rc; |
| 6679 | |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6680 | pci_set_power_state(pdev, PCI_D0); |
| 6681 | pci_restore_state(pdev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6682 | |
Tejun Heo | b878ca5 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6683 | rc = pcim_enable_device(pdev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6684 | if (rc) { |
| 6685 | dev_printk(KERN_ERR, &pdev->dev, |
| 6686 | "failed to enable device after resume (%d)\n", rc); |
| 6687 | return rc; |
| 6688 | } |
| 6689 | |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6690 | pci_set_master(pdev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6691 | return 0; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6692 | } |
| 6693 | |
Tejun Heo | 3c5100c | 2006-07-26 16:58:33 +0900 | [diff] [blame] | 6694 | 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] | 6695 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6696 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6697 | int rc = 0; |
| 6698 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6699 | rc = ata_host_suspend(host, mesg); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6700 | if (rc) |
| 6701 | return rc; |
| 6702 | |
Tejun Heo | 3c5100c | 2006-07-26 16:58:33 +0900 | [diff] [blame] | 6703 | ata_pci_device_do_suspend(pdev, mesg); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6704 | |
| 6705 | return 0; |
| 6706 | } |
| 6707 | |
| 6708 | int ata_pci_device_resume(struct pci_dev *pdev) |
| 6709 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6710 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6711 | int rc; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6712 | |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6713 | rc = ata_pci_device_do_resume(pdev); |
| 6714 | if (rc == 0) |
| 6715 | ata_host_resume(host); |
| 6716 | return rc; |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6717 | } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6718 | #endif /* CONFIG_PM */ |
| 6719 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6720 | #endif /* CONFIG_PCI */ |
| 6721 | |
| 6722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6723 | static int __init ata_init(void) |
| 6724 | { |
Andrew Morton | a8601e5 | 2006-06-25 01:36:52 -0700 | [diff] [blame] | 6725 | ata_probe_timeout *= HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6726 | ata_wq = create_workqueue("ata"); |
| 6727 | if (!ata_wq) |
| 6728 | return -ENOMEM; |
| 6729 | |
Tejun Heo | 453b07a | 2006-05-31 18:27:42 +0900 | [diff] [blame] | 6730 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
| 6731 | if (!ata_aux_wq) { |
| 6732 | destroy_workqueue(ata_wq); |
| 6733 | return -ENOMEM; |
| 6734 | } |
| 6735 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6736 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
| 6737 | return 0; |
| 6738 | } |
| 6739 | |
| 6740 | static void __exit ata_exit(void) |
| 6741 | { |
| 6742 | destroy_workqueue(ata_wq); |
Tejun Heo | 453b07a | 2006-05-31 18:27:42 +0900 | [diff] [blame] | 6743 | destroy_workqueue(ata_aux_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6744 | } |
| 6745 | |
Brian King | a462508 | 2006-11-13 16:32:36 -0600 | [diff] [blame] | 6746 | subsys_initcall(ata_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6747 | module_exit(ata_exit); |
| 6748 | |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 6749 | static unsigned long ratelimit_time; |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 6750 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 6751 | |
| 6752 | int ata_ratelimit(void) |
| 6753 | { |
| 6754 | int rc; |
| 6755 | unsigned long flags; |
| 6756 | |
| 6757 | spin_lock_irqsave(&ata_ratelimit_lock, flags); |
| 6758 | |
| 6759 | if (time_after(jiffies, ratelimit_time)) { |
| 6760 | rc = 1; |
| 6761 | ratelimit_time = jiffies + (HZ/5); |
| 6762 | } else |
| 6763 | rc = 0; |
| 6764 | |
| 6765 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); |
| 6766 | |
| 6767 | return rc; |
| 6768 | } |
| 6769 | |
Tejun Heo | c22daff | 2006-04-11 22:22:29 +0900 | [diff] [blame] | 6770 | /** |
| 6771 | * ata_wait_register - wait until register value changes |
| 6772 | * @reg: IO-mapped register |
| 6773 | * @mask: Mask to apply to read register value |
| 6774 | * @val: Wait condition |
| 6775 | * @interval_msec: polling interval in milliseconds |
| 6776 | * @timeout_msec: timeout in milliseconds |
| 6777 | * |
| 6778 | * Waiting for some bits of register to change is a common |
| 6779 | * operation for ATA controllers. This function reads 32bit LE |
| 6780 | * IO-mapped register @reg and tests for the following condition. |
| 6781 | * |
| 6782 | * (*@reg & mask) != val |
| 6783 | * |
| 6784 | * If the condition is met, it returns; otherwise, the process is |
| 6785 | * repeated after @interval_msec until timeout. |
| 6786 | * |
| 6787 | * LOCKING: |
| 6788 | * Kernel thread context (may sleep) |
| 6789 | * |
| 6790 | * RETURNS: |
| 6791 | * The final register value. |
| 6792 | */ |
| 6793 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, |
| 6794 | unsigned long interval_msec, |
| 6795 | unsigned long timeout_msec) |
| 6796 | { |
| 6797 | unsigned long timeout; |
| 6798 | u32 tmp; |
| 6799 | |
| 6800 | tmp = ioread32(reg); |
| 6801 | |
| 6802 | /* Calculate timeout _after_ the first read to make sure |
| 6803 | * preceding writes reach the controller before starting to |
| 6804 | * eat away the timeout. |
| 6805 | */ |
| 6806 | timeout = jiffies + (timeout_msec * HZ) / 1000; |
| 6807 | |
| 6808 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { |
| 6809 | msleep(interval_msec); |
| 6810 | tmp = ioread32(reg); |
| 6811 | } |
| 6812 | |
| 6813 | return tmp; |
| 6814 | } |
| 6815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6816 | /* |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 6817 | * Dummy port_ops |
| 6818 | */ |
| 6819 | static void ata_dummy_noret(struct ata_port *ap) { } |
| 6820 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } |
| 6821 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } |
| 6822 | |
| 6823 | static u8 ata_dummy_check_status(struct ata_port *ap) |
| 6824 | { |
| 6825 | return ATA_DRDY; |
| 6826 | } |
| 6827 | |
| 6828 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) |
| 6829 | { |
| 6830 | return AC_ERR_SYSTEM; |
| 6831 | } |
| 6832 | |
| 6833 | const struct ata_port_operations ata_dummy_port_ops = { |
| 6834 | .port_disable = ata_port_disable, |
| 6835 | .check_status = ata_dummy_check_status, |
| 6836 | .check_altstatus = ata_dummy_check_status, |
| 6837 | .dev_select = ata_noop_dev_select, |
| 6838 | .qc_prep = ata_noop_qc_prep, |
| 6839 | .qc_issue = ata_dummy_qc_issue, |
| 6840 | .freeze = ata_dummy_noret, |
| 6841 | .thaw = ata_dummy_noret, |
| 6842 | .error_handler = ata_dummy_noret, |
| 6843 | .post_internal_cmd = ata_dummy_qc_noret, |
| 6844 | .irq_clear = ata_dummy_noret, |
| 6845 | .port_start = ata_dummy_ret0, |
| 6846 | .port_stop = ata_dummy_noret, |
| 6847 | }; |
| 6848 | |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6849 | const struct ata_port_info ata_dummy_port_info = { |
| 6850 | .port_ops = &ata_dummy_port_ops, |
| 6851 | }; |
| 6852 | |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 6853 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6854 | * libata is essentially a library of internal helper functions for |
| 6855 | * low-level ATA host controller drivers. As such, the API/ABI is |
| 6856 | * likely to change as new drivers are added and updated. |
| 6857 | * Do not depend on ABI/API stability. |
| 6858 | */ |
| 6859 | |
Tejun Heo | e9c8391 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 6860 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
| 6861 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); |
| 6862 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 6863 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6864 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6865 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
| 6866 | EXPORT_SYMBOL_GPL(ata_std_ports); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6867 | EXPORT_SYMBOL_GPL(ata_host_init); |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6868 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6869 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
Tejun Heo | ecef725 | 2007-04-17 23:44:06 +0900 | [diff] [blame] | 6870 | EXPORT_SYMBOL_GPL(ata_host_start); |
Tejun Heo | f318719 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6871 | EXPORT_SYMBOL_GPL(ata_host_register); |
Tejun Heo | f5cda25 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 6872 | EXPORT_SYMBOL_GPL(ata_host_activate); |
Tejun Heo | 0529c15 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 6873 | EXPORT_SYMBOL_GPL(ata_host_detach); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6874 | EXPORT_SYMBOL_GPL(ata_sg_init); |
| 6875 | EXPORT_SYMBOL_GPL(ata_sg_init_one); |
Tejun Heo | 9a1004d | 2006-05-31 18:27:52 +0900 | [diff] [blame] | 6876 | EXPORT_SYMBOL_GPL(ata_hsm_move); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 6877 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 6878 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6879 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6880 | EXPORT_SYMBOL_GPL(ata_tf_load); |
| 6881 | EXPORT_SYMBOL_GPL(ata_tf_read); |
| 6882 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); |
| 6883 | EXPORT_SYMBOL_GPL(ata_std_dev_select); |
Jeff Garzik | 43727fb | 2007-02-25 16:50:52 -0500 | [diff] [blame] | 6884 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6885 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
| 6886 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); |
| 6887 | EXPORT_SYMBOL_GPL(ata_check_status); |
| 6888 | EXPORT_SYMBOL_GPL(ata_altstatus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6889 | EXPORT_SYMBOL_GPL(ata_exec_command); |
| 6890 | EXPORT_SYMBOL_GPL(ata_port_start); |
Alan Cox | d92e74d | 2007-06-07 16:19:15 +0100 | [diff] [blame] | 6891 | EXPORT_SYMBOL_GPL(ata_sff_port_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6892 | EXPORT_SYMBOL_GPL(ata_interrupt); |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 6893 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 6894 | EXPORT_SYMBOL_GPL(ata_data_xfer); |
| 6895 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6896 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
Alan Cox | d26fc95 | 2007-07-06 19:13:52 -0400 | [diff] [blame] | 6897 | EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); |
Brian King | e46834c | 2006-03-17 17:04:03 -0600 | [diff] [blame] | 6898 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6899 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
| 6900 | EXPORT_SYMBOL_GPL(ata_bmdma_start); |
| 6901 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); |
| 6902 | EXPORT_SYMBOL_GPL(ata_bmdma_status); |
| 6903 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 6904 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
| 6905 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); |
| 6906 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); |
| 6907 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); |
| 6908 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6909 | EXPORT_SYMBOL_GPL(ata_port_probe); |
Alan | 10305f0 | 2007-02-20 18:01:59 +0000 | [diff] [blame] | 6910 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 6911 | EXPORT_SYMBOL_GPL(sata_set_spd); |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 6912 | EXPORT_SYMBOL_GPL(sata_phy_debounce); |
| 6913 | EXPORT_SYMBOL_GPL(sata_phy_resume); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6914 | EXPORT_SYMBOL_GPL(sata_phy_reset); |
| 6915 | EXPORT_SYMBOL_GPL(__sata_phy_reset); |
| 6916 | EXPORT_SYMBOL_GPL(ata_bus_reset); |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 6917 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 6918 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 6919 | EXPORT_SYMBOL_GPL(sata_port_hardreset); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 6920 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
| 6921 | EXPORT_SYMBOL_GPL(ata_std_postreset); |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 6922 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
| 6923 | EXPORT_SYMBOL_GPL(ata_dev_pair); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6924 | EXPORT_SYMBOL_GPL(ata_port_disable); |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 6925 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
Tejun Heo | c22daff | 2006-04-11 22:22:29 +0900 | [diff] [blame] | 6926 | EXPORT_SYMBOL_GPL(ata_wait_register); |
Tejun Heo | 6f8b995 | 2006-01-24 17:05:21 +0900 | [diff] [blame] | 6927 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
Tejun Heo | d4b2bab | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 6928 | EXPORT_SYMBOL_GPL(ata_wait_ready); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 6929 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6930 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
| 6931 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6932 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
Tejun Heo | 83c47bc | 2006-05-31 18:28:07 +0900 | [diff] [blame] | 6933 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 6934 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6935 | EXPORT_SYMBOL_GPL(ata_host_intr); |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6936 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
| 6937 | EXPORT_SYMBOL_GPL(sata_scr_read); |
| 6938 | EXPORT_SYMBOL_GPL(sata_scr_write); |
| 6939 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); |
| 6940 | EXPORT_SYMBOL_GPL(ata_port_online); |
| 6941 | EXPORT_SYMBOL_GPL(ata_port_offline); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6942 | #ifdef CONFIG_PM |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6943 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
| 6944 | EXPORT_SYMBOL_GPL(ata_host_resume); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6945 | #endif /* CONFIG_PM */ |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 6946 | EXPORT_SYMBOL_GPL(ata_id_string); |
| 6947 | EXPORT_SYMBOL_GPL(ata_id_c_string); |
Alan | 10305f0 | 2007-02-20 18:01:59 +0000 | [diff] [blame] | 6948 | EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6949 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
| 6950 | |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 6951 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 6952 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
| 6953 | EXPORT_SYMBOL_GPL(ata_timing_merge); |
| 6954 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6955 | #ifdef CONFIG_PCI |
| 6956 | EXPORT_SYMBOL_GPL(pci_test_config_bits); |
Tejun Heo | d583bc1 | 2007-07-04 18:02:07 +0900 | [diff] [blame] | 6957 | EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 6958 | EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); |
Tejun Heo | d583bc1 | 2007-07-04 18:02:07 +0900 | [diff] [blame] | 6959 | EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6960 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
| 6961 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6962 | #ifdef CONFIG_PM |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6963 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
| 6964 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6965 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
| 6966 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6967 | #endif /* CONFIG_PM */ |
Alan Cox | 67951ad | 2006-03-22 15:55:54 +0000 | [diff] [blame] | 6968 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
| 6969 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6970 | #endif /* CONFIG_PCI */ |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6971 | |
Tejun Heo | b64bbc3 | 2007-07-16 14:29:39 +0900 | [diff] [blame] | 6972 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
| 6973 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); |
| 6974 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 6975 | EXPORT_SYMBOL_GPL(ata_eng_timeout); |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 6976 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
| 6977 | EXPORT_SYMBOL_GPL(ata_port_abort); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 6978 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
| 6979 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
| 6980 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 6981 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
| 6982 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 6983 | EXPORT_SYMBOL_GPL(ata_do_eh); |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 6984 | EXPORT_SYMBOL_GPL(ata_irq_on); |
| 6985 | EXPORT_SYMBOL_GPL(ata_dummy_irq_on); |
| 6986 | EXPORT_SYMBOL_GPL(ata_irq_ack); |
| 6987 | EXPORT_SYMBOL_GPL(ata_dummy_irq_ack); |
Akira Iguchi | a619f981b | 2007-01-26 16:28:18 +0900 | [diff] [blame] | 6988 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 6989 | |
| 6990 | EXPORT_SYMBOL_GPL(ata_cable_40wire); |
| 6991 | EXPORT_SYMBOL_GPL(ata_cable_80wire); |
| 6992 | EXPORT_SYMBOL_GPL(ata_cable_unknown); |
| 6993 | EXPORT_SYMBOL_GPL(ata_cable_sata); |