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 | cb48cab | 2007-02-26 06:04:24 -0500 | [diff] [blame] | 62 | #define DRV_VERSION "2.20" /* 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 75 | static unsigned int ata_print_id = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | static struct workqueue_struct *ata_wq; |
| 77 | |
Tejun Heo | 453b07a | 2006-05-31 18:27:42 +0900 | [diff] [blame] | 78 | struct workqueue_struct *ata_aux_wq; |
| 79 | |
Jeff Garzik | 418dc1f | 2006-03-11 20:50:08 -0500 | [diff] [blame] | 80 | int atapi_enabled = 1; |
Jeff Garzik | 1623c81 | 2005-08-30 03:37:42 -0400 | [diff] [blame] | 81 | module_param(atapi_enabled, int, 0444); |
| 82 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); |
| 83 | |
Albert Lee | 95de719 | 2006-04-04 10:57:18 +0800 | [diff] [blame] | 84 | int atapi_dmadir = 0; |
| 85 | module_param(atapi_dmadir, int, 0444); |
| 86 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); |
| 87 | |
Jeff Garzik | c3c013a | 2006-02-27 22:31:19 -0500 | [diff] [blame] | 88 | int libata_fua = 0; |
| 89 | module_param_named(fua, libata_fua, int, 0444); |
| 90 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); |
| 91 | |
Andrew Morton | a8601e5 | 2006-06-25 01:36:52 -0700 | [diff] [blame] | 92 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
| 93 | module_param(ata_probe_timeout, int, 0444); |
| 94 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); |
| 95 | |
Jeff Garzik | d7d0dad | 2007-03-28 01:57:37 -0400 | [diff] [blame] | 96 | int libata_noacpi = 1; |
| 97 | module_param_named(noacpi, libata_noacpi, int, 0444); |
Kristen Carlson Accardi | 11ef697 | 2006-09-28 11:29:01 -0700 | [diff] [blame] | 98 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); |
| 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | MODULE_AUTHOR("Jeff Garzik"); |
| 101 | MODULE_DESCRIPTION("Library module for ATA devices"); |
| 102 | MODULE_LICENSE("GPL"); |
| 103 | MODULE_VERSION(DRV_VERSION); |
| 104 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 105 | |
| 106 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure |
| 108 | * @tf: Taskfile to convert |
| 109 | * @fis: Buffer into which data will output |
| 110 | * @pmp: Port multiplier port |
| 111 | * |
| 112 | * Converts a standard ATA taskfile to a Serial ATA |
| 113 | * FIS structure (Register - Host to Device). |
| 114 | * |
| 115 | * LOCKING: |
| 116 | * Inherited from caller. |
| 117 | */ |
| 118 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 119 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | { |
| 121 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
| 122 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, |
| 123 | bit 7 indicates Command FIS */ |
| 124 | fis[2] = tf->command; |
| 125 | fis[3] = tf->feature; |
| 126 | |
| 127 | fis[4] = tf->lbal; |
| 128 | fis[5] = tf->lbam; |
| 129 | fis[6] = tf->lbah; |
| 130 | fis[7] = tf->device; |
| 131 | |
| 132 | fis[8] = tf->hob_lbal; |
| 133 | fis[9] = tf->hob_lbam; |
| 134 | fis[10] = tf->hob_lbah; |
| 135 | fis[11] = tf->hob_feature; |
| 136 | |
| 137 | fis[12] = tf->nsect; |
| 138 | fis[13] = tf->hob_nsect; |
| 139 | fis[14] = 0; |
| 140 | fis[15] = tf->ctl; |
| 141 | |
| 142 | fis[16] = 0; |
| 143 | fis[17] = 0; |
| 144 | fis[18] = 0; |
| 145 | fis[19] = 0; |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile |
| 150 | * @fis: Buffer from which data will be input |
| 151 | * @tf: Taskfile to output |
| 152 | * |
Mark Lord | e12a1be | 2005-11-12 18:55:45 -0500 | [diff] [blame] | 153 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | * |
| 155 | * LOCKING: |
| 156 | * Inherited from caller. |
| 157 | */ |
| 158 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 159 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | { |
| 161 | tf->command = fis[2]; /* status */ |
| 162 | tf->feature = fis[3]; /* error */ |
| 163 | |
| 164 | tf->lbal = fis[4]; |
| 165 | tf->lbam = fis[5]; |
| 166 | tf->lbah = fis[6]; |
| 167 | tf->device = fis[7]; |
| 168 | |
| 169 | tf->hob_lbal = fis[8]; |
| 170 | tf->hob_lbam = fis[9]; |
| 171 | tf->hob_lbah = fis[10]; |
| 172 | |
| 173 | tf->nsect = fis[12]; |
| 174 | tf->hob_nsect = fis[13]; |
| 175 | } |
| 176 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 177 | static const u8 ata_rw_cmds[] = { |
| 178 | /* pio multi */ |
| 179 | ATA_CMD_READ_MULTI, |
| 180 | ATA_CMD_WRITE_MULTI, |
| 181 | ATA_CMD_READ_MULTI_EXT, |
| 182 | ATA_CMD_WRITE_MULTI_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 183 | 0, |
| 184 | 0, |
| 185 | 0, |
| 186 | ATA_CMD_WRITE_MULTI_FUA_EXT, |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 187 | /* pio */ |
| 188 | ATA_CMD_PIO_READ, |
| 189 | ATA_CMD_PIO_WRITE, |
| 190 | ATA_CMD_PIO_READ_EXT, |
| 191 | ATA_CMD_PIO_WRITE_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 192 | 0, |
| 193 | 0, |
| 194 | 0, |
| 195 | 0, |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 196 | /* dma */ |
| 197 | ATA_CMD_READ, |
| 198 | ATA_CMD_WRITE, |
| 199 | ATA_CMD_READ_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 200 | ATA_CMD_WRITE_EXT, |
| 201 | 0, |
| 202 | 0, |
| 203 | 0, |
| 204 | ATA_CMD_WRITE_FUA_EXT |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 205 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | /** |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 208 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 209 | * @tf: command to examine and configure |
| 210 | * @dev: device tf belongs to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | * |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 212 | * Examine the device configuration and tf->flags to calculate |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 213 | * the proper read/write commands and protocol to use. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | * |
| 215 | * LOCKING: |
| 216 | * caller. |
| 217 | */ |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 218 | 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] | 219 | { |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 220 | u8 cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 222 | int index, fua, lba48, write; |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 223 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 224 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 225 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
| 226 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 228 | if (dev->flags & ATA_DFLAG_PIO) { |
| 229 | tf->protocol = ATA_PROT_PIO; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 230 | index = dev->multi_count ? 0 : 8; |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 231 | } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { |
Alan Cox | 8d238e0 | 2006-01-17 20:50:31 +0000 | [diff] [blame] | 232 | /* Unable to use DMA due to host limitation */ |
| 233 | tf->protocol = ATA_PROT_PIO; |
Albert Lee | 0565c26 | 2006-02-13 18:55:25 +0800 | [diff] [blame] | 234 | index = dev->multi_count ? 0 : 8; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 235 | } else { |
| 236 | tf->protocol = ATA_PROT_DMA; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 237 | index = 16; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 238 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 240 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
| 241 | if (cmd) { |
| 242 | tf->command = cmd; |
| 243 | return 0; |
| 244 | } |
| 245 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
| 247 | |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 248 | /** |
Tejun Heo | 35b649f | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 249 | * ata_tf_read_block - Read block address from ATA taskfile |
| 250 | * @tf: ATA taskfile of interest |
| 251 | * @dev: ATA device @tf belongs to |
| 252 | * |
| 253 | * LOCKING: |
| 254 | * None. |
| 255 | * |
| 256 | * Read block address from @tf. This function can handle all |
| 257 | * three address formats - LBA, LBA48 and CHS. tf->protocol and |
| 258 | * flags select the address format to use. |
| 259 | * |
| 260 | * RETURNS: |
| 261 | * Block address read from @tf. |
| 262 | */ |
| 263 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) |
| 264 | { |
| 265 | u64 block = 0; |
| 266 | |
| 267 | if (tf->flags & ATA_TFLAG_LBA) { |
| 268 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 269 | block |= (u64)tf->hob_lbah << 40; |
| 270 | block |= (u64)tf->hob_lbam << 32; |
| 271 | block |= tf->hob_lbal << 24; |
| 272 | } else |
| 273 | block |= (tf->device & 0xf) << 24; |
| 274 | |
| 275 | block |= tf->lbah << 16; |
| 276 | block |= tf->lbam << 8; |
| 277 | block |= tf->lbal; |
| 278 | } else { |
| 279 | u32 cyl, head, sect; |
| 280 | |
| 281 | cyl = tf->lbam | (tf->lbah << 8); |
| 282 | head = tf->device & 0xf; |
| 283 | sect = tf->lbal; |
| 284 | |
| 285 | block = (cyl * dev->heads + head) * dev->sectors + sect; |
| 286 | } |
| 287 | |
| 288 | return block; |
| 289 | } |
| 290 | |
| 291 | /** |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 292 | * ata_build_rw_tf - Build ATA taskfile for given read/write request |
| 293 | * @tf: Target ATA taskfile |
| 294 | * @dev: ATA device @tf belongs to |
| 295 | * @block: Block address |
| 296 | * @n_block: Number of blocks |
| 297 | * @tf_flags: RW/FUA etc... |
| 298 | * @tag: tag |
| 299 | * |
| 300 | * LOCKING: |
| 301 | * None. |
| 302 | * |
| 303 | * Build ATA taskfile @tf for read/write request described by |
| 304 | * @block, @n_block, @tf_flags and @tag on @dev. |
| 305 | * |
| 306 | * RETURNS: |
| 307 | * |
| 308 | * 0 on success, -ERANGE if the request is too large for @dev, |
| 309 | * -EINVAL if the request is invalid. |
| 310 | */ |
| 311 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, |
| 312 | u64 block, u32 n_block, unsigned int tf_flags, |
| 313 | unsigned int tag) |
| 314 | { |
| 315 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 316 | tf->flags |= tf_flags; |
| 317 | |
Tejun Heo | 6d1245b | 2007-02-20 23:20:27 +0900 | [diff] [blame] | 318 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
Tejun Heo | bd056d7 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 319 | /* yay, NCQ */ |
| 320 | if (!lba_48_ok(block, n_block)) |
| 321 | return -ERANGE; |
| 322 | |
| 323 | tf->protocol = ATA_PROT_NCQ; |
| 324 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
| 325 | |
| 326 | if (tf->flags & ATA_TFLAG_WRITE) |
| 327 | tf->command = ATA_CMD_FPDMA_WRITE; |
| 328 | else |
| 329 | tf->command = ATA_CMD_FPDMA_READ; |
| 330 | |
| 331 | tf->nsect = tag << 3; |
| 332 | tf->hob_feature = (n_block >> 8) & 0xff; |
| 333 | tf->feature = n_block & 0xff; |
| 334 | |
| 335 | tf->hob_lbah = (block >> 40) & 0xff; |
| 336 | tf->hob_lbam = (block >> 32) & 0xff; |
| 337 | tf->hob_lbal = (block >> 24) & 0xff; |
| 338 | tf->lbah = (block >> 16) & 0xff; |
| 339 | tf->lbam = (block >> 8) & 0xff; |
| 340 | tf->lbal = block & 0xff; |
| 341 | |
| 342 | tf->device = 1 << 6; |
| 343 | if (tf->flags & ATA_TFLAG_FUA) |
| 344 | tf->device |= 1 << 7; |
| 345 | } else if (dev->flags & ATA_DFLAG_LBA) { |
| 346 | tf->flags |= ATA_TFLAG_LBA; |
| 347 | |
| 348 | if (lba_28_ok(block, n_block)) { |
| 349 | /* use LBA28 */ |
| 350 | tf->device |= (block >> 24) & 0xf; |
| 351 | } else if (lba_48_ok(block, n_block)) { |
| 352 | if (!(dev->flags & ATA_DFLAG_LBA48)) |
| 353 | return -ERANGE; |
| 354 | |
| 355 | /* use LBA48 */ |
| 356 | tf->flags |= ATA_TFLAG_LBA48; |
| 357 | |
| 358 | tf->hob_nsect = (n_block >> 8) & 0xff; |
| 359 | |
| 360 | tf->hob_lbah = (block >> 40) & 0xff; |
| 361 | tf->hob_lbam = (block >> 32) & 0xff; |
| 362 | tf->hob_lbal = (block >> 24) & 0xff; |
| 363 | } else |
| 364 | /* request too large even for LBA48 */ |
| 365 | return -ERANGE; |
| 366 | |
| 367 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) |
| 368 | return -EINVAL; |
| 369 | |
| 370 | tf->nsect = n_block & 0xff; |
| 371 | |
| 372 | tf->lbah = (block >> 16) & 0xff; |
| 373 | tf->lbam = (block >> 8) & 0xff; |
| 374 | tf->lbal = block & 0xff; |
| 375 | |
| 376 | tf->device |= ATA_LBA; |
| 377 | } else { |
| 378 | /* CHS */ |
| 379 | u32 sect, head, cyl, track; |
| 380 | |
| 381 | /* The request -may- be too large for CHS addressing. */ |
| 382 | if (!lba_28_ok(block, n_block)) |
| 383 | return -ERANGE; |
| 384 | |
| 385 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) |
| 386 | return -EINVAL; |
| 387 | |
| 388 | /* Convert LBA to CHS */ |
| 389 | track = (u32)block / dev->sectors; |
| 390 | cyl = track / dev->heads; |
| 391 | head = track % dev->heads; |
| 392 | sect = (u32)block % dev->sectors + 1; |
| 393 | |
| 394 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
| 395 | (u32)block, track, cyl, head, sect); |
| 396 | |
| 397 | /* Check whether the converted CHS can fit. |
| 398 | Cylinder: 0-65535 |
| 399 | Head: 0-15 |
| 400 | Sector: 1-255*/ |
| 401 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
| 402 | return -ERANGE; |
| 403 | |
| 404 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ |
| 405 | tf->lbal = sect; |
| 406 | tf->lbam = cyl; |
| 407 | tf->lbah = cyl >> 8; |
| 408 | tf->device |= head; |
| 409 | } |
| 410 | |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | /** |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 415 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask |
| 416 | * @pio_mask: pio_mask |
| 417 | * @mwdma_mask: mwdma_mask |
| 418 | * @udma_mask: udma_mask |
| 419 | * |
| 420 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single |
| 421 | * unsigned int xfer_mask. |
| 422 | * |
| 423 | * LOCKING: |
| 424 | * None. |
| 425 | * |
| 426 | * RETURNS: |
| 427 | * Packed xfer_mask. |
| 428 | */ |
| 429 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, |
| 430 | unsigned int mwdma_mask, |
| 431 | unsigned int udma_mask) |
| 432 | { |
| 433 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | |
| 434 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | |
| 435 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); |
| 436 | } |
| 437 | |
Tejun Heo | c0489e4 | 2006-03-24 14:07:49 +0900 | [diff] [blame] | 438 | /** |
| 439 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks |
| 440 | * @xfer_mask: xfer_mask to unpack |
| 441 | * @pio_mask: resulting pio_mask |
| 442 | * @mwdma_mask: resulting mwdma_mask |
| 443 | * @udma_mask: resulting udma_mask |
| 444 | * |
| 445 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. |
| 446 | * Any NULL distination masks will be ignored. |
| 447 | */ |
| 448 | static void ata_unpack_xfermask(unsigned int xfer_mask, |
| 449 | unsigned int *pio_mask, |
| 450 | unsigned int *mwdma_mask, |
| 451 | unsigned int *udma_mask) |
| 452 | { |
| 453 | if (pio_mask) |
| 454 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; |
| 455 | if (mwdma_mask) |
| 456 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; |
| 457 | if (udma_mask) |
| 458 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; |
| 459 | } |
| 460 | |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 461 | static const struct ata_xfer_ent { |
Tejun Heo | be9a50c | 2006-03-31 22:48:52 +0900 | [diff] [blame] | 462 | int shift, bits; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 463 | u8 base; |
| 464 | } ata_xfer_tbl[] = { |
| 465 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, |
| 466 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, |
| 467 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, |
| 468 | { -1, }, |
| 469 | }; |
| 470 | |
| 471 | /** |
| 472 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask |
| 473 | * @xfer_mask: xfer_mask of interest |
| 474 | * |
| 475 | * Return matching XFER_* value for @xfer_mask. Only the highest |
| 476 | * bit of @xfer_mask is considered. |
| 477 | * |
| 478 | * LOCKING: |
| 479 | * None. |
| 480 | * |
| 481 | * RETURNS: |
| 482 | * Matching XFER_* value, 0 if no match found. |
| 483 | */ |
| 484 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) |
| 485 | { |
| 486 | int highbit = fls(xfer_mask) - 1; |
| 487 | const struct ata_xfer_ent *ent; |
| 488 | |
| 489 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| 490 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) |
| 491 | return ent->base + highbit - ent->shift; |
| 492 | return 0; |
| 493 | } |
| 494 | |
| 495 | /** |
| 496 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* |
| 497 | * @xfer_mode: XFER_* of interest |
| 498 | * |
| 499 | * Return matching xfer_mask for @xfer_mode. |
| 500 | * |
| 501 | * LOCKING: |
| 502 | * None. |
| 503 | * |
| 504 | * RETURNS: |
| 505 | * Matching xfer_mask, 0 if no match found. |
| 506 | */ |
| 507 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) |
| 508 | { |
| 509 | const struct ata_xfer_ent *ent; |
| 510 | |
| 511 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| 512 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) |
| 513 | return 1 << (ent->shift + xfer_mode - ent->base); |
| 514 | return 0; |
| 515 | } |
| 516 | |
| 517 | /** |
| 518 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* |
| 519 | * @xfer_mode: XFER_* of interest |
| 520 | * |
| 521 | * Return matching xfer_shift for @xfer_mode. |
| 522 | * |
| 523 | * LOCKING: |
| 524 | * None. |
| 525 | * |
| 526 | * RETURNS: |
| 527 | * Matching xfer_shift, -1 if no match found. |
| 528 | */ |
| 529 | static int ata_xfer_mode2shift(unsigned int xfer_mode) |
| 530 | { |
| 531 | const struct ata_xfer_ent *ent; |
| 532 | |
| 533 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| 534 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) |
| 535 | return ent->shift; |
| 536 | return -1; |
| 537 | } |
| 538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | /** |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 540 | * ata_mode_string - convert xfer_mask to string |
| 541 | * @xfer_mask: mask of bits supported; only highest bit counts. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | * |
| 543 | * Determine string which represents the highest speed |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 544 | * (highest bit in @modemask). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | * |
| 546 | * LOCKING: |
| 547 | * None. |
| 548 | * |
| 549 | * RETURNS: |
| 550 | * Constant C string representing highest speed listed in |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 551 | * @mode_mask, or the constant C string "<n/a>". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | */ |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 553 | static const char *ata_mode_string(unsigned int xfer_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | { |
Tejun Heo | 75f554b | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 555 | static const char * const xfer_mode_str[] = { |
| 556 | "PIO0", |
| 557 | "PIO1", |
| 558 | "PIO2", |
| 559 | "PIO3", |
| 560 | "PIO4", |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 561 | "PIO5", |
| 562 | "PIO6", |
Tejun Heo | 75f554b | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 563 | "MWDMA0", |
| 564 | "MWDMA1", |
| 565 | "MWDMA2", |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 566 | "MWDMA3", |
| 567 | "MWDMA4", |
Tejun Heo | 75f554b | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 568 | "UDMA/16", |
| 569 | "UDMA/25", |
| 570 | "UDMA/33", |
| 571 | "UDMA/44", |
| 572 | "UDMA/66", |
| 573 | "UDMA/100", |
| 574 | "UDMA/133", |
| 575 | "UDMA7", |
| 576 | }; |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 577 | int highbit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Tejun Heo | 1da7b0d | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 579 | highbit = fls(xfer_mask) - 1; |
| 580 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) |
| 581 | return xfer_mode_str[highbit]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | return "<n/a>"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |
| 584 | |
Tejun Heo | 4c360c8 | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 585 | static const char *sata_spd_string(unsigned int spd) |
| 586 | { |
| 587 | static const char * const spd_str[] = { |
| 588 | "1.5 Gbps", |
| 589 | "3.0 Gbps", |
| 590 | }; |
| 591 | |
| 592 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) |
| 593 | return "<unknown>"; |
| 594 | return spd_str[spd - 1]; |
| 595 | } |
| 596 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 597 | void ata_dev_disable(struct ata_device *dev) |
Tejun Heo | 0b8efb0 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 598 | { |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 599 | if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 600 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 601 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
| 602 | ATA_DNXFER_QUIET); |
Tejun Heo | 0b8efb0 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 603 | dev->class++; |
| 604 | } |
| 605 | } |
| 606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | * ata_devchk - PATA device presence detection |
| 609 | * @ap: ATA channel to examine |
| 610 | * @device: Device to examine (starting at zero) |
| 611 | * |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 612 | * This technique was originally described in |
| 613 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 614 | * later found its way into the ATA/ATAPI spec. |
| 615 | * |
| 616 | * Write a pattern to the ATA shadow registers, |
| 617 | * and if a device is present, it will respond by |
| 618 | * correctly storing and echoing back the |
| 619 | * ATA shadow register contents. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | * |
| 621 | * LOCKING: |
| 622 | * caller. |
| 623 | */ |
| 624 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 625 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 627 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 628 | u8 nsect, lbal; |
| 629 | |
| 630 | ap->ops->dev_select(ap, device); |
| 631 | |
| 632 | iowrite8(0x55, ioaddr->nsect_addr); |
| 633 | iowrite8(0xaa, ioaddr->lbal_addr); |
| 634 | |
| 635 | iowrite8(0xaa, ioaddr->nsect_addr); |
| 636 | iowrite8(0x55, ioaddr->lbal_addr); |
| 637 | |
| 638 | iowrite8(0x55, ioaddr->nsect_addr); |
| 639 | iowrite8(0xaa, ioaddr->lbal_addr); |
| 640 | |
| 641 | nsect = ioread8(ioaddr->nsect_addr); |
| 642 | lbal = ioread8(ioaddr->lbal_addr); |
| 643 | |
| 644 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 645 | return 1; /* we found a device */ |
| 646 | |
| 647 | return 0; /* nothing found */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | } |
| 649 | |
| 650 | /** |
| 651 | * ata_dev_classify - determine device type based on ATA-spec signature |
| 652 | * @tf: ATA taskfile register set for device to be identified |
| 653 | * |
| 654 | * Determine from taskfile register contents whether a device is |
| 655 | * ATA or ATAPI, as per "Signature and persistence" section |
| 656 | * of ATA/PI spec (volume 1, sect 5.14). |
| 657 | * |
| 658 | * LOCKING: |
| 659 | * None. |
| 660 | * |
| 661 | * RETURNS: |
| 662 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN |
| 663 | * the event of failure. |
| 664 | */ |
| 665 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 666 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | { |
| 668 | /* Apple's open source Darwin code hints that some devices only |
| 669 | * put a proper signature into the LBA mid/high registers, |
| 670 | * So, we only check those. It's sufficient for uniqueness. |
| 671 | */ |
| 672 | |
| 673 | if (((tf->lbam == 0) && (tf->lbah == 0)) || |
| 674 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { |
| 675 | DPRINTK("found ATA device by sig\n"); |
| 676 | return ATA_DEV_ATA; |
| 677 | } |
| 678 | |
| 679 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || |
| 680 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { |
| 681 | DPRINTK("found ATAPI device by sig\n"); |
| 682 | return ATA_DEV_ATAPI; |
| 683 | } |
| 684 | |
| 685 | DPRINTK("unknown device\n"); |
| 686 | return ATA_DEV_UNKNOWN; |
| 687 | } |
| 688 | |
| 689 | /** |
| 690 | * ata_dev_try_classify - Parse returned ATA device signature |
| 691 | * @ap: ATA channel to examine |
| 692 | * @device: Device to examine (starting at zero) |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 693 | * @r_err: Value of error register on completion |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | * |
| 695 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, |
| 696 | * an ATA/ATAPI-defined set of values is placed in the ATA |
| 697 | * shadow registers, indicating the results of device detection |
| 698 | * and diagnostics. |
| 699 | * |
| 700 | * Select the ATA device, and read the values from the ATA shadow |
| 701 | * registers. Then parse according to the Error register value, |
| 702 | * and the spec-defined values examined by ata_dev_classify(). |
| 703 | * |
| 704 | * LOCKING: |
| 705 | * caller. |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 706 | * |
| 707 | * RETURNS: |
| 708 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | */ |
| 710 | |
Akira Iguchi | a619f981b | 2007-01-26 16:28:18 +0900 | [diff] [blame] | 711 | unsigned int |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 712 | 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] | 713 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | struct ata_taskfile tf; |
| 715 | unsigned int class; |
| 716 | u8 err; |
| 717 | |
| 718 | ap->ops->dev_select(ap, device); |
| 719 | |
| 720 | memset(&tf, 0, sizeof(tf)); |
| 721 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | ap->ops->tf_read(ap, &tf); |
Jeff Garzik | 0169e28 | 2005-10-29 21:25:10 -0400 | [diff] [blame] | 723 | err = tf.feature; |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 724 | if (r_err) |
| 725 | *r_err = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | |
Alan Cox | 9359085 | 2006-09-12 16:55:12 +0100 | [diff] [blame] | 727 | /* see if device passed diags: if master then continue and warn later */ |
| 728 | if (err == 0 && device == 0) |
| 729 | /* diagnostic fail : do nothing _YET_ */ |
| 730 | ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; |
| 731 | else if (err == 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | /* do nothing */ ; |
| 733 | else if ((device == 0) && (err == 0x81)) |
| 734 | /* do nothing */ ; |
| 735 | else |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 736 | return ATA_DEV_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 738 | /* determine if device is ATA or ATAPI */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | class = ata_dev_classify(&tf); |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 740 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | if (class == ATA_DEV_UNKNOWN) |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 742 | return ATA_DEV_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 744 | return ATA_DEV_NONE; |
| 745 | return class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | } |
| 747 | |
| 748 | /** |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 749 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | * @id: IDENTIFY DEVICE results we will examine |
| 751 | * @s: string into which data is output |
| 752 | * @ofs: offset into identify device page |
| 753 | * @len: length of string to return. must be an even number. |
| 754 | * |
| 755 | * The strings in the IDENTIFY DEVICE page are broken up into |
| 756 | * 16-bit chunks. Run through the string, and output each |
| 757 | * 8-bit chunk linearly, regardless of platform. |
| 758 | * |
| 759 | * LOCKING: |
| 760 | * caller. |
| 761 | */ |
| 762 | |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 763 | void ata_id_string(const u16 *id, unsigned char *s, |
| 764 | unsigned int ofs, unsigned int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | { |
| 766 | unsigned int c; |
| 767 | |
| 768 | while (len > 0) { |
| 769 | c = id[ofs] >> 8; |
| 770 | *s = c; |
| 771 | s++; |
| 772 | |
| 773 | c = id[ofs] & 0xff; |
| 774 | *s = c; |
| 775 | s++; |
| 776 | |
| 777 | ofs++; |
| 778 | len -= 2; |
| 779 | } |
| 780 | } |
| 781 | |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 782 | /** |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 783 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 784 | * @id: IDENTIFY DEVICE results we will examine |
| 785 | * @s: string into which data is output |
| 786 | * @ofs: offset into identify device page |
| 787 | * @len: length of string to return. must be an odd number. |
| 788 | * |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 789 | * This function is identical to ata_id_string except that it |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 790 | * trims trailing spaces and terminates the resulting string with |
| 791 | * null. @len must be actual maximum length (even number) + 1. |
| 792 | * |
| 793 | * LOCKING: |
| 794 | * caller. |
| 795 | */ |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 796 | void ata_id_c_string(const u16 *id, unsigned char *s, |
| 797 | unsigned int ofs, unsigned int len) |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 798 | { |
| 799 | unsigned char *p; |
| 800 | |
| 801 | WARN_ON(!(len & 1)); |
| 802 | |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 803 | ata_id_string(id, s, ofs, len - 1); |
Tejun Heo | 0e949ff | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 804 | |
| 805 | p = s + strnlen(s, len - 1); |
| 806 | while (p > s && p[-1] == ' ') |
| 807 | p--; |
| 808 | *p = '\0'; |
| 809 | } |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 810 | |
Tejun Heo | 2940740 | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 811 | static u64 ata_id_n_sectors(const u16 *id) |
| 812 | { |
| 813 | if (ata_id_has_lba(id)) { |
| 814 | if (ata_id_has_lba48(id)) |
| 815 | return ata_id_u64(id, 100); |
| 816 | else |
| 817 | return ata_id_u32(id, 60); |
| 818 | } else { |
| 819 | if (ata_id_current_chs_valid(id)) |
| 820 | return ata_id_u32(id, 57); |
| 821 | else |
| 822 | return id[1] * id[3] * id[6]; |
| 823 | } |
| 824 | } |
| 825 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 826 | /** |
Alan | 10305f0 | 2007-02-20 18:01:59 +0000 | [diff] [blame] | 827 | * ata_id_to_dma_mode - Identify DMA mode from id block |
| 828 | * @dev: device to identify |
Randy Dunlap | cc26126 | 2007-03-16 19:55:47 -0700 | [diff] [blame] | 829 | * @unknown: mode to assume if we cannot tell |
Alan | 10305f0 | 2007-02-20 18:01:59 +0000 | [diff] [blame] | 830 | * |
| 831 | * Set up the timing values for the device based upon the identify |
| 832 | * reported values for the DMA mode. This function is used by drivers |
| 833 | * which rely upon firmware configured modes, but wish to report the |
| 834 | * mode correctly when possible. |
| 835 | * |
| 836 | * In addition we emit similarly formatted messages to the default |
| 837 | * ata_dev_set_mode handler, in order to provide consistency of |
| 838 | * presentation. |
| 839 | */ |
| 840 | |
| 841 | void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) |
| 842 | { |
| 843 | unsigned int mask; |
| 844 | u8 mode; |
| 845 | |
| 846 | /* Pack the DMA modes */ |
| 847 | mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; |
| 848 | if (dev->id[53] & 0x04) |
| 849 | mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; |
| 850 | |
| 851 | /* Select the mode in use */ |
| 852 | mode = ata_xfer_mask2mode(mask); |
| 853 | |
| 854 | if (mode != 0) { |
| 855 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", |
| 856 | ata_mode_string(mask)); |
| 857 | } else { |
| 858 | /* SWDMA perhaps ? */ |
| 859 | mode = unknown; |
| 860 | ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); |
| 861 | } |
| 862 | |
| 863 | /* Configure the device reporting */ |
| 864 | dev->xfer_mode = mode; |
| 865 | dev->xfer_shift = ata_xfer_mode2shift(mode); |
| 866 | } |
| 867 | |
| 868 | /** |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 869 | * ata_noop_dev_select - Select device 0/1 on ATA bus |
| 870 | * @ap: ATA channel to manipulate |
| 871 | * @device: ATA device (numbered from zero) to select |
| 872 | * |
| 873 | * This function performs no actual function. |
| 874 | * |
| 875 | * May be used as the dev_select() entry in ata_port_operations. |
| 876 | * |
| 877 | * LOCKING: |
| 878 | * caller. |
| 879 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
| 881 | { |
| 882 | } |
| 883 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 884 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | /** |
| 886 | * ata_std_dev_select - Select device 0/1 on ATA bus |
| 887 | * @ap: ATA channel to manipulate |
| 888 | * @device: ATA device (numbered from zero) to select |
| 889 | * |
| 890 | * Use the method defined in the ATA specification to |
| 891 | * make either device 0, or device 1, active on the |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 892 | * ATA channel. Works with both PIO and MMIO. |
| 893 | * |
| 894 | * May be used as the dev_select() entry in ata_port_operations. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | * |
| 896 | * LOCKING: |
| 897 | * caller. |
| 898 | */ |
| 899 | |
| 900 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) |
| 901 | { |
| 902 | u8 tmp; |
| 903 | |
| 904 | if (device == 0) |
| 905 | tmp = ATA_DEVICE_OBS; |
| 906 | else |
| 907 | tmp = ATA_DEVICE_OBS | ATA_DEV1; |
| 908 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 909 | iowrite8(tmp, ap->ioaddr.device_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | ata_pause(ap); /* needed; also flushes, for mmio */ |
| 911 | } |
| 912 | |
| 913 | /** |
| 914 | * ata_dev_select - Select device 0/1 on ATA bus |
| 915 | * @ap: ATA channel to manipulate |
| 916 | * @device: ATA device (numbered from zero) to select |
| 917 | * @wait: non-zero to wait for Status register BSY bit to clear |
| 918 | * @can_sleep: non-zero if context allows sleeping |
| 919 | * |
| 920 | * Use the method defined in the ATA specification to |
| 921 | * make either device 0, or device 1, active on the |
| 922 | * ATA channel. |
| 923 | * |
| 924 | * This is a high-level version of ata_std_dev_select(), |
| 925 | * which additionally provides the services of inserting |
| 926 | * the proper pauses and status polling, where needed. |
| 927 | * |
| 928 | * LOCKING: |
| 929 | * caller. |
| 930 | */ |
| 931 | |
| 932 | void ata_dev_select(struct ata_port *ap, unsigned int device, |
| 933 | unsigned int wait, unsigned int can_sleep) |
| 934 | { |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 935 | if (ata_msg_probe(ap)) |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 936 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
| 937 | "device %u, wait %u\n", device, wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | |
| 939 | if (wait) |
| 940 | ata_wait_idle(ap); |
| 941 | |
| 942 | ap->ops->dev_select(ap, device); |
| 943 | |
| 944 | if (wait) { |
| 945 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) |
| 946 | msleep(150); |
| 947 | ata_wait_idle(ap); |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | /** |
| 952 | * ata_dump_id - IDENTIFY DEVICE info debugging output |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 953 | * @id: IDENTIFY DEVICE page to dump |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | * |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 955 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
| 956 | * page. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | * |
| 958 | * LOCKING: |
| 959 | * caller. |
| 960 | */ |
| 961 | |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 962 | static inline void ata_dump_id(const u16 *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | { |
| 964 | DPRINTK("49==0x%04x " |
| 965 | "53==0x%04x " |
| 966 | "63==0x%04x " |
| 967 | "64==0x%04x " |
| 968 | "75==0x%04x \n", |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 969 | id[49], |
| 970 | id[53], |
| 971 | id[63], |
| 972 | id[64], |
| 973 | id[75]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | DPRINTK("80==0x%04x " |
| 975 | "81==0x%04x " |
| 976 | "82==0x%04x " |
| 977 | "83==0x%04x " |
| 978 | "84==0x%04x \n", |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 979 | id[80], |
| 980 | id[81], |
| 981 | id[82], |
| 982 | id[83], |
| 983 | id[84]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | DPRINTK("88==0x%04x " |
| 985 | "93==0x%04x\n", |
Tejun Heo | 0bd3300 | 2006-02-12 22:47:05 +0900 | [diff] [blame] | 986 | id[88], |
| 987 | id[93]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | } |
| 989 | |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 990 | /** |
| 991 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data |
| 992 | * @id: IDENTIFY data to compute xfer mask from |
| 993 | * |
| 994 | * Compute the xfermask for this device. This is not as trivial |
| 995 | * as it seems if we must consider early devices correctly. |
| 996 | * |
| 997 | * FIXME: pre IDE drive timing (do we care ?). |
| 998 | * |
| 999 | * LOCKING: |
| 1000 | * None. |
| 1001 | * |
| 1002 | * RETURNS: |
| 1003 | * Computed xfermask |
| 1004 | */ |
| 1005 | static unsigned int ata_id_xfermask(const u16 *id) |
| 1006 | { |
| 1007 | unsigned int pio_mask, mwdma_mask, udma_mask; |
| 1008 | |
| 1009 | /* Usual case. Word 53 indicates word 64 is valid */ |
| 1010 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { |
| 1011 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; |
| 1012 | pio_mask <<= 3; |
| 1013 | pio_mask |= 0x7; |
| 1014 | } else { |
| 1015 | /* If word 64 isn't valid then Word 51 high byte holds |
| 1016 | * the PIO timing number for the maximum. Turn it into |
| 1017 | * a mask. |
| 1018 | */ |
Lennert Buytenhek | 7a0f1c8 | 2007-01-29 13:28:47 +0100 | [diff] [blame] | 1019 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
Alan Cox | 46767aeb | 2006-09-29 18:26:47 +0100 | [diff] [blame] | 1020 | if (mode < 5) /* Valid PIO range */ |
| 1021 | pio_mask = (2 << mode) - 1; |
| 1022 | else |
| 1023 | pio_mask = 1; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1024 | |
| 1025 | /* But wait.. there's more. Design your standards by |
| 1026 | * committee and you too can get a free iordy field to |
| 1027 | * process. However its the speeds not the modes that |
| 1028 | * are supported... Note drivers using the timing API |
| 1029 | * will get this right anyway |
| 1030 | */ |
| 1031 | } |
| 1032 | |
| 1033 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; |
Tejun Heo | fb21f0d | 2006-03-12 12:34:35 +0900 | [diff] [blame] | 1034 | |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 1035 | if (ata_id_is_cfa(id)) { |
| 1036 | /* |
| 1037 | * Process compact flash extended modes |
| 1038 | */ |
| 1039 | int pio = id[163] & 0x7; |
| 1040 | int dma = (id[163] >> 3) & 7; |
| 1041 | |
| 1042 | if (pio) |
| 1043 | pio_mask |= (1 << 5); |
| 1044 | if (pio > 1) |
| 1045 | pio_mask |= (1 << 6); |
| 1046 | if (dma) |
| 1047 | mwdma_mask |= (1 << 3); |
| 1048 | if (dma > 1) |
| 1049 | mwdma_mask |= (1 << 4); |
| 1050 | } |
| 1051 | |
Tejun Heo | fb21f0d | 2006-03-12 12:34:35 +0900 | [diff] [blame] | 1052 | udma_mask = 0; |
| 1053 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) |
| 1054 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; |
Tejun Heo | cb95d56 | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1055 | |
| 1056 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
| 1057 | } |
| 1058 | |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1059 | /** |
| 1060 | * ata_port_queue_task - Queue port_task |
| 1061 | * @ap: The ata_port to queue port_task for |
Randy Dunlap | e2a7f77 | 2006-05-18 10:50:18 -0700 | [diff] [blame] | 1062 | * @fn: workqueue function to be scheduled |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 1063 | * @data: data for @fn to use |
Randy Dunlap | e2a7f77 | 2006-05-18 10:50:18 -0700 | [diff] [blame] | 1064 | * @delay: delay time for workqueue function |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1065 | * |
| 1066 | * Schedule @fn(@data) for execution after @delay jiffies using |
| 1067 | * port_task. There is one port_task per port and it's the |
| 1068 | * user(low level driver)'s responsibility to make sure that only |
| 1069 | * one task is active at any given time. |
| 1070 | * |
| 1071 | * libata core layer takes care of synchronization between |
| 1072 | * port_task and EH. ata_port_queue_task() may be ignored for EH |
| 1073 | * synchronization. |
| 1074 | * |
| 1075 | * LOCKING: |
| 1076 | * Inherited from caller. |
| 1077 | */ |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 1078 | 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] | 1079 | unsigned long delay) |
| 1080 | { |
| 1081 | int rc; |
| 1082 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1083 | if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK) |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1084 | return; |
| 1085 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 1086 | PREPARE_DELAYED_WORK(&ap->port_task, fn); |
| 1087 | ap->port_task_data = data; |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1088 | |
David Howells | 52bad64 | 2006-11-22 14:54:01 +0000 | [diff] [blame] | 1089 | rc = queue_delayed_work(ata_wq, &ap->port_task, delay); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1090 | |
| 1091 | /* rc == 0 means that another user is using port task */ |
| 1092 | WARN_ON(rc == 0); |
| 1093 | } |
| 1094 | |
| 1095 | /** |
| 1096 | * ata_port_flush_task - Flush port_task |
| 1097 | * @ap: The ata_port to flush port_task for |
| 1098 | * |
| 1099 | * After this function completes, port_task is guranteed not to |
| 1100 | * be running or scheduled. |
| 1101 | * |
| 1102 | * LOCKING: |
| 1103 | * Kernel thread context (may sleep) |
| 1104 | */ |
| 1105 | void ata_port_flush_task(struct ata_port *ap) |
| 1106 | { |
| 1107 | unsigned long flags; |
| 1108 | |
| 1109 | DPRINTK("ENTER\n"); |
| 1110 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1111 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1112 | ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK; |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1113 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1114 | |
| 1115 | DPRINTK("flush #1\n"); |
| 1116 | flush_workqueue(ata_wq); |
| 1117 | |
| 1118 | /* |
| 1119 | * At this point, if a task is running, it's guaranteed to see |
| 1120 | * the FLUSH flag; thus, it will never queue pio tasks again. |
| 1121 | * Cancel and flush. |
| 1122 | */ |
| 1123 | if (!cancel_delayed_work(&ap->port_task)) { |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1124 | if (ata_msg_ctl(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1125 | ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n", |
| 1126 | __FUNCTION__); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1127 | flush_workqueue(ata_wq); |
| 1128 | } |
| 1129 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1130 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1131 | ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK; |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1132 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1133 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1134 | if (ata_msg_ctl(ap)) |
| 1135 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 1136 | } |
| 1137 | |
Adrian Bunk | 7102d23 | 2007-01-04 00:09:36 +0100 | [diff] [blame] | 1138 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1139 | { |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1140 | struct completion *waiting = qc->private_data; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1141 | |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1142 | complete(waiting); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1143 | } |
| 1144 | |
| 1145 | /** |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1146 | * ata_exec_internal_sg - execute libata internal command |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1147 | * @dev: Device to which the command is sent |
| 1148 | * @tf: Taskfile registers for the command and the result |
Tejun Heo | d69cf37 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1149 | * @cdb: CDB for packet command |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1150 | * @dma_dir: Data tranfer direction of the command |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1151 | * @sg: sg list for the data buffer of the command |
| 1152 | * @n_elem: Number of sg entries |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1153 | * |
| 1154 | * Executes libata internal command with timeout. @tf contains |
| 1155 | * command on entry and result on return. Timeout and error |
| 1156 | * conditions are reported via return value. No recovery action |
| 1157 | * is taken after a command times out. It's caller's duty to |
| 1158 | * clean up after timeout. |
| 1159 | * |
| 1160 | * LOCKING: |
| 1161 | * None. Should be called with kernel context, might sleep. |
Tejun Heo | 551e888 | 2006-06-12 14:09:49 +0900 | [diff] [blame] | 1162 | * |
| 1163 | * RETURNS: |
| 1164 | * Zero on success, AC_ERR_* mask on failure |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1165 | */ |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1166 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
| 1167 | struct ata_taskfile *tf, const u8 *cdb, |
| 1168 | int dma_dir, struct scatterlist *sg, |
| 1169 | unsigned int n_elem) |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1170 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1171 | struct ata_port *ap = dev->ap; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1172 | u8 command = tf->command; |
| 1173 | struct ata_queued_cmd *qc; |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1174 | unsigned int tag, preempted_tag; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1175 | u32 preempted_sactive, preempted_qc_active; |
Ingo Molnar | 60be6b9 | 2006-07-03 00:25:26 -0700 | [diff] [blame] | 1176 | DECLARE_COMPLETION_ONSTACK(wait); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1177 | unsigned long flags; |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1178 | unsigned int err_mask; |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1179 | int rc; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1180 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1181 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1182 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1183 | /* no internal command while frozen */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1184 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1185 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1186 | return AC_ERR_SYSTEM; |
| 1187 | } |
| 1188 | |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1189 | /* initialize internal qc */ |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1190 | |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1191 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
| 1192 | * drivers choke if any other tag is given. This breaks |
| 1193 | * ata_tag_internal() test for those drivers. Don't use new |
| 1194 | * EH stuff without converting to it. |
| 1195 | */ |
| 1196 | if (ap->ops->error_handler) |
| 1197 | tag = ATA_TAG_INTERNAL; |
| 1198 | else |
| 1199 | tag = 0; |
| 1200 | |
Tejun Heo | 6cec4a3 | 2006-05-15 21:03:41 +0900 | [diff] [blame] | 1201 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1202 | BUG(); |
Tejun Heo | f69499f | 2006-05-15 20:58:03 +0900 | [diff] [blame] | 1203 | qc = __ata_qc_from_tag(ap, tag); |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1204 | |
| 1205 | qc->tag = tag; |
| 1206 | qc->scsicmd = NULL; |
| 1207 | qc->ap = ap; |
| 1208 | qc->dev = dev; |
| 1209 | ata_qc_reinit(qc); |
| 1210 | |
| 1211 | preempted_tag = ap->active_tag; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1212 | preempted_sactive = ap->sactive; |
| 1213 | preempted_qc_active = ap->qc_active; |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1214 | ap->active_tag = ATA_TAG_POISON; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1215 | ap->sactive = 0; |
| 1216 | ap->qc_active = 0; |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1217 | |
| 1218 | /* prepare & issue qc */ |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1219 | qc->tf = *tf; |
Tejun Heo | d69cf37 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1220 | if (cdb) |
| 1221 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); |
Tejun Heo | e61e067 | 2006-05-15 20:57:40 +0900 | [diff] [blame] | 1222 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1223 | qc->dma_dir = dma_dir; |
| 1224 | if (dma_dir != DMA_NONE) { |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1225 | unsigned int i, buflen = 0; |
| 1226 | |
| 1227 | for (i = 0; i < n_elem; i++) |
| 1228 | buflen += sg[i].length; |
| 1229 | |
| 1230 | ata_sg_init(qc, sg, n_elem); |
Brian King | 49c8042 | 2007-01-30 11:32:26 -0600 | [diff] [blame] | 1231 | qc->nbytes = buflen; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1232 | } |
| 1233 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1234 | qc->private_data = &wait; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1235 | qc->complete_fn = ata_qc_complete_internal; |
| 1236 | |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 1237 | ata_qc_issue(qc); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1238 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1239 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1240 | |
Andrew Morton | a8601e5 | 2006-06-25 01:36:52 -0700 | [diff] [blame] | 1241 | rc = wait_for_completion_timeout(&wait, ata_probe_timeout); |
Albert Lee | 41ade50 | 2006-03-14 11:19:04 +0800 | [diff] [blame] | 1242 | |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1243 | ata_port_flush_task(ap); |
| 1244 | |
| 1245 | if (!rc) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1246 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1247 | |
| 1248 | /* We're racing with irq here. If we lose, the |
| 1249 | * following test prevents us from completing the qc |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1250 | * twice. If we win, the port is frozen and will be |
| 1251 | * cleaned up by ->post_internal_cmd(). |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1252 | */ |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1253 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1254 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 1255 | |
| 1256 | if (ap->ops->error_handler) |
| 1257 | ata_port_freeze(ap); |
| 1258 | else |
| 1259 | ata_qc_complete(qc); |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 1260 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1261 | if (ata_msg_warn(ap)) |
| 1262 | ata_dev_printk(dev, KERN_WARNING, |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1263 | "qc timeout (cmd 0x%x)\n", command); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1264 | } |
| 1265 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1266 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1267 | } |
| 1268 | |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1269 | /* do post_internal_cmd */ |
| 1270 | if (ap->ops->post_internal_cmd) |
| 1271 | ap->ops->post_internal_cmd(qc); |
| 1272 | |
Alan | 18d90de | 2007-01-24 11:42:38 +0000 | [diff] [blame] | 1273 | if ((qc->flags & ATA_QCFLAG_FAILED) && !qc->err_mask) { |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1274 | if (ata_msg_warn(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1275 | ata_dev_printk(dev, KERN_WARNING, |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1276 | "zero err_mask for failed " |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1277 | "internal command, assuming AC_ERR_OTHER\n"); |
Tejun Heo | d95a717 | 2006-05-15 20:58:14 +0900 | [diff] [blame] | 1278 | qc->err_mask |= AC_ERR_OTHER; |
| 1279 | } |
| 1280 | |
Tejun Heo | 1586930 | 2006-05-15 20:57:33 +0900 | [diff] [blame] | 1281 | /* finish up */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1282 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 1586930 | 2006-05-15 20:57:33 +0900 | [diff] [blame] | 1283 | |
Tejun Heo | e61e067 | 2006-05-15 20:57:40 +0900 | [diff] [blame] | 1284 | *tf = qc->result_tf; |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1285 | err_mask = qc->err_mask; |
| 1286 | |
| 1287 | ata_qc_free(qc); |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 1288 | ap->active_tag = preempted_tag; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 1289 | ap->sactive = preempted_sactive; |
| 1290 | ap->qc_active = preempted_qc_active; |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1291 | |
Tejun Heo | 1f7dd3e9 | 2006-03-24 15:25:30 +0900 | [diff] [blame] | 1292 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
| 1293 | * Until those drivers are fixed, we detect the condition |
| 1294 | * here, fail the command with AC_ERR_SYSTEM and reenable the |
| 1295 | * port. |
| 1296 | * |
| 1297 | * Note that this doesn't change any behavior as internal |
| 1298 | * command failure results in disabling the device in the |
| 1299 | * higher layer for LLDDs without new reset/EH callbacks. |
| 1300 | * |
| 1301 | * Kill the following code as soon as those drivers are fixed. |
| 1302 | */ |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 1303 | if (ap->flags & ATA_FLAG_DISABLED) { |
Tejun Heo | 1f7dd3e9 | 2006-03-24 15:25:30 +0900 | [diff] [blame] | 1304 | err_mask |= AC_ERR_SYSTEM; |
| 1305 | ata_port_probe(ap); |
| 1306 | } |
| 1307 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1308 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 1586930 | 2006-05-15 20:57:33 +0900 | [diff] [blame] | 1309 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1310 | return err_mask; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1311 | } |
| 1312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | /** |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1314 | * ata_exec_internal - execute libata internal command |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1315 | * @dev: Device to which the command is sent |
| 1316 | * @tf: Taskfile registers for the command and the result |
| 1317 | * @cdb: CDB for packet command |
| 1318 | * @dma_dir: Data tranfer direction of the command |
| 1319 | * @buf: Data buffer of the command |
| 1320 | * @buflen: Length of data buffer |
| 1321 | * |
| 1322 | * Wrapper around ata_exec_internal_sg() which takes simple |
| 1323 | * buffer instead of sg list. |
| 1324 | * |
| 1325 | * LOCKING: |
| 1326 | * None. Should be called with kernel context, might sleep. |
| 1327 | * |
| 1328 | * RETURNS: |
| 1329 | * Zero on success, AC_ERR_* mask on failure |
| 1330 | */ |
| 1331 | unsigned ata_exec_internal(struct ata_device *dev, |
| 1332 | struct ata_taskfile *tf, const u8 *cdb, |
| 1333 | int dma_dir, void *buf, unsigned int buflen) |
| 1334 | { |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1335 | struct scatterlist *psg = NULL, sg; |
| 1336 | unsigned int n_elem = 0; |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1337 | |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1338 | if (dma_dir != DMA_NONE) { |
| 1339 | WARN_ON(!buf); |
| 1340 | sg_init_one(&sg, buf, buflen); |
| 1341 | psg = &sg; |
| 1342 | n_elem++; |
| 1343 | } |
Tejun Heo | 2432697 | 2006-11-14 22:47:09 +0900 | [diff] [blame] | 1344 | |
Tejun Heo | 33480a0 | 2006-12-12 02:15:31 +0900 | [diff] [blame] | 1345 | 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] | 1346 | } |
| 1347 | |
| 1348 | /** |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1349 | * ata_do_simple_cmd - execute simple internal command |
| 1350 | * @dev: Device to which the command is sent |
| 1351 | * @cmd: Opcode to execute |
| 1352 | * |
| 1353 | * Execute a 'simple' command, that only consists of the opcode |
| 1354 | * 'cmd' itself, without filling any other registers |
| 1355 | * |
| 1356 | * LOCKING: |
| 1357 | * Kernel thread context (may sleep). |
| 1358 | * |
| 1359 | * RETURNS: |
| 1360 | * Zero on success, AC_ERR_* mask on failure |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1361 | */ |
Tejun Heo | 77b08fb | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1362 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1363 | { |
| 1364 | struct ata_taskfile tf; |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1365 | |
| 1366 | ata_tf_init(dev, &tf); |
| 1367 | |
| 1368 | tf.command = cmd; |
| 1369 | tf.flags |= ATA_TFLAG_DEVICE; |
| 1370 | tf.protocol = ATA_PROT_NODATA; |
| 1371 | |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1372 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
Tejun Heo | e58eb58 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1373 | } |
| 1374 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | /** |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1376 | * ata_pio_need_iordy - check if iordy needed |
| 1377 | * @adev: ATA device |
| 1378 | * |
| 1379 | * Check if the current speed of the device requires IORDY. Used |
| 1380 | * by various controllers for chip configuration. |
| 1381 | */ |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1382 | |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1383 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
| 1384 | { |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1385 | /* Controller doesn't support IORDY. Probably a pointless check |
| 1386 | as the caller should know this */ |
| 1387 | if (adev->ap->flags & ATA_FLAG_NO_IORDY) |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1388 | return 0; |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1389 | /* PIO3 and higher it is mandatory */ |
| 1390 | if (adev->pio_mode > XFER_PIO_2) |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1391 | return 1; |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1392 | /* We turn it on when possible */ |
| 1393 | if (ata_id_has_iordy(adev->id)) |
| 1394 | return 1; |
| 1395 | return 0; |
| 1396 | } |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 1397 | |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1398 | /** |
| 1399 | * ata_pio_mask_no_iordy - Return the non IORDY mask |
| 1400 | * @adev: ATA device |
| 1401 | * |
| 1402 | * Compute the highest mode possible if we are not using iordy. Return |
| 1403 | * -1 if no iordy mode is available. |
| 1404 | */ |
| 1405 | |
| 1406 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
| 1407 | { |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1408 | /* 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] | 1409 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1410 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1411 | /* Is the speed faster than the drive allows non IORDY ? */ |
| 1412 | if (pio) { |
| 1413 | /* This is cycle times not frequency - watch the logic! */ |
| 1414 | if (pio > 240) /* PIO2 is 240nS per cycle */ |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1415 | return 3 << ATA_SHIFT_PIO; |
| 1416 | return 7 << ATA_SHIFT_PIO; |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1417 | } |
| 1418 | } |
Alan Cox | 432729f | 2007-03-08 23:22:59 +0000 | [diff] [blame] | 1419 | return 3 << ATA_SHIFT_PIO; |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1420 | } |
| 1421 | |
| 1422 | /** |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1423 | * ata_dev_read_id - Read ID data from the specified device |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1424 | * @dev: target device |
| 1425 | * @p_class: pointer to class of the target device (may be changed) |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1426 | * @flags: ATA_READID_* flags |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 1427 | * @id: buffer to read IDENTIFY data into |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1428 | * |
| 1429 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
| 1430 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 1431 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
| 1432 | * for pre-ATA4 drives. |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1433 | * |
| 1434 | * LOCKING: |
| 1435 | * Kernel thread context (may sleep) |
| 1436 | * |
| 1437 | * RETURNS: |
| 1438 | * 0 on success, -errno otherwise. |
| 1439 | */ |
Tejun Heo | a9beec9 | 2006-05-31 18:27:44 +0900 | [diff] [blame] | 1440 | 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] | 1441 | unsigned int flags, u16 *id) |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1442 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1443 | struct ata_port *ap = dev->ap; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1444 | unsigned int class = *p_class; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1445 | struct ata_taskfile tf; |
| 1446 | unsigned int err_mask = 0; |
| 1447 | const char *reason; |
| 1448 | int rc; |
| 1449 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1450 | if (ata_msg_ctl(ap)) |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1451 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1452 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1453 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
| 1454 | |
| 1455 | retry: |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1456 | ata_tf_init(dev, &tf); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1457 | |
| 1458 | switch (class) { |
| 1459 | case ATA_DEV_ATA: |
| 1460 | tf.command = ATA_CMD_ID_ATA; |
| 1461 | break; |
| 1462 | case ATA_DEV_ATAPI: |
| 1463 | tf.command = ATA_CMD_ID_ATAPI; |
| 1464 | break; |
| 1465 | default: |
| 1466 | rc = -ENODEV; |
| 1467 | reason = "unsupported class"; |
| 1468 | goto err_out; |
| 1469 | } |
| 1470 | |
| 1471 | tf.protocol = ATA_PROT_PIO; |
Tejun Heo | 81afe89 | 2007-02-07 12:37:41 -0800 | [diff] [blame] | 1472 | |
| 1473 | /* Some devices choke if TF registers contain garbage. Make |
| 1474 | * sure those are properly initialized. |
| 1475 | */ |
| 1476 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1477 | |
| 1478 | /* Device presence detection is unreliable on some |
| 1479 | * controllers. Always poll IDENTIFY if available. |
| 1480 | */ |
| 1481 | tf.flags |= ATA_TFLAG_POLLING; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1482 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1483 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1484 | id, sizeof(id[0]) * ATA_ID_WORDS); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1485 | if (err_mask) { |
Tejun Heo | 800b399 | 2006-12-03 21:34:13 +0900 | [diff] [blame] | 1486 | if (err_mask & AC_ERR_NODEV_HINT) { |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1487 | DPRINTK("ata%u.%d: NODEV after polling detection\n", |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1488 | ap->print_id, dev->devno); |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1489 | return -ENOENT; |
| 1490 | } |
| 1491 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1492 | rc = -EIO; |
| 1493 | reason = "I/O error"; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1494 | goto err_out; |
| 1495 | } |
| 1496 | |
| 1497 | swap_buf_le16(id, ATA_ID_WORDS); |
| 1498 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1499 | /* sanity check */ |
Tejun Heo | a4f5749 | 2006-09-12 20:35:49 -0700 | [diff] [blame] | 1500 | rc = -EINVAL; |
| 1501 | reason = "device reports illegal type"; |
| 1502 | |
| 1503 | if (class == ATA_DEV_ATA) { |
| 1504 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) |
| 1505 | goto err_out; |
| 1506 | } else { |
| 1507 | if (ata_id_is_ata(id)) |
| 1508 | goto err_out; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1509 | } |
| 1510 | |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1511 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1512 | /* |
| 1513 | * The exact sequence expected by certain pre-ATA4 drives is: |
| 1514 | * SRST RESET |
| 1515 | * IDENTIFY |
| 1516 | * INITIALIZE DEVICE PARAMETERS |
| 1517 | * anything else.. |
| 1518 | * Some drives were very specific about that exact sequence. |
| 1519 | */ |
| 1520 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1521 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1522 | if (err_mask) { |
| 1523 | rc = -EIO; |
| 1524 | reason = "INIT_DEV_PARAMS failed"; |
| 1525 | goto err_out; |
| 1526 | } |
| 1527 | |
| 1528 | /* current CHS translation info (id[53-58]) might be |
| 1529 | * changed. reread the identify device info. |
| 1530 | */ |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1531 | flags &= ~ATA_READID_POSTRESET; |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1532 | goto retry; |
| 1533 | } |
| 1534 | } |
| 1535 | |
| 1536 | *p_class = class; |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 1537 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1538 | return 0; |
| 1539 | |
| 1540 | err_out: |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1541 | if (ata_msg_warn(ap)) |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1542 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1543 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1544 | return rc; |
| 1545 | } |
| 1546 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1547 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1548 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1549 | 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] | 1550 | } |
| 1551 | |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 1552 | static void ata_dev_config_ncq(struct ata_device *dev, |
| 1553 | char *desc, size_t desc_sz) |
| 1554 | { |
| 1555 | struct ata_port *ap = dev->ap; |
| 1556 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
| 1557 | |
| 1558 | if (!ata_id_has_ncq(dev->id)) { |
| 1559 | desc[0] = '\0'; |
| 1560 | return; |
| 1561 | } |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 1562 | if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) { |
| 1563 | snprintf(desc, desc_sz, "NCQ (not used)"); |
| 1564 | return; |
| 1565 | } |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 1566 | if (ap->flags & ATA_FLAG_NCQ) { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 1567 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 1568 | dev->flags |= ATA_DFLAG_NCQ; |
| 1569 | } |
| 1570 | |
| 1571 | if (hdepth >= ddepth) |
| 1572 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); |
| 1573 | else |
| 1574 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); |
| 1575 | } |
| 1576 | |
Tejun Heo | 49016ac | 2006-02-21 02:12:11 +0900 | [diff] [blame] | 1577 | /** |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1578 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1579 | * @dev: Target device to configure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | * |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1581 | * Configure @dev according to @dev->id. Generic and low-level |
| 1582 | * driver specific fixups are also applied. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | * |
| 1584 | * LOCKING: |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1585 | * Kernel thread context (may sleep) |
| 1586 | * |
| 1587 | * RETURNS: |
| 1588 | * 0 on success, -errno otherwise |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | */ |
Tejun Heo | efdaedc | 2006-11-01 18:38:52 +0900 | [diff] [blame] | 1590 | int ata_dev_configure(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1592 | struct ata_port *ap = dev->ap; |
Tejun Heo | efdaedc | 2006-11-01 18:38:52 +0900 | [diff] [blame] | 1593 | int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO; |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1594 | const u16 *id = dev->id; |
Tejun Heo | ff8854b | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1595 | unsigned int xfer_mask; |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 1596 | char revbuf[7]; /* XYZ-99\0 */ |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1597 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
| 1598 | char modelbuf[ATA_ID_PROD_LEN+1]; |
Brian King | e6d902a | 2006-06-28 08:30:31 -0500 | [diff] [blame] | 1599 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1601 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1602 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
| 1603 | __FUNCTION__); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1604 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | } |
| 1606 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1607 | if (ata_msg_probe(ap)) |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1608 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | |
Kristen Carlson Accardi | 08573a8 | 2006-11-10 16:14:47 -0800 | [diff] [blame] | 1610 | /* set _SDD */ |
| 1611 | rc = ata_acpi_push_id(ap, dev->devno); |
| 1612 | if (rc) { |
| 1613 | ata_dev_printk(dev, KERN_WARNING, "failed to set _SDD(%d)\n", |
| 1614 | rc); |
| 1615 | } |
| 1616 | |
| 1617 | /* retrieve and execute the ATA task file of _GTF */ |
| 1618 | ata_acpi_exec_tfs(ap); |
| 1619 | |
Tejun Heo | c39f5eb | 2006-03-13 19:51:19 +0900 | [diff] [blame] | 1620 | /* print device capabilities */ |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1621 | if (ata_msg_probe(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1622 | ata_dev_printk(dev, KERN_DEBUG, |
| 1623 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " |
| 1624 | "85:%04x 86:%04x 87:%04x 88:%04x\n", |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1625 | __FUNCTION__, |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 1626 | id[49], id[82], id[83], id[84], |
| 1627 | id[85], id[86], id[87], id[88]); |
Tejun Heo | c39f5eb | 2006-03-13 19:51:19 +0900 | [diff] [blame] | 1628 | |
Tejun Heo | 208a993 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1629 | /* initialize to-be-configured parameters */ |
Tejun Heo | ea1dd4e | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1630 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
Tejun Heo | 208a993 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1631 | dev->max_sectors = 0; |
| 1632 | dev->cdb_len = 0; |
| 1633 | dev->n_sectors = 0; |
| 1634 | dev->cylinders = 0; |
| 1635 | dev->heads = 0; |
| 1636 | dev->sectors = 0; |
| 1637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | /* |
| 1639 | * common ATA, ATAPI feature tests |
| 1640 | */ |
| 1641 | |
Tejun Heo | ff8854b | 2006-03-06 04:31:56 +0900 | [diff] [blame] | 1642 | /* find max transfer mode; for printk only */ |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1643 | xfer_mask = ata_id_xfermask(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1645 | if (ata_msg_probe(ap)) |
| 1646 | ata_dump_id(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | |
| 1648 | /* ATA-specific feature tests */ |
| 1649 | if (dev->class == ATA_DEV_ATA) { |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 1650 | if (ata_id_is_cfa(id)) { |
| 1651 | if (id[162] & 1) /* CPRM may make this media unusable */ |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1652 | ata_dev_printk(dev, KERN_WARNING, |
| 1653 | "supports DRM functions and may " |
| 1654 | "not be fully accessable.\n"); |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 1655 | snprintf(revbuf, 7, "CFA"); |
| 1656 | } |
| 1657 | else |
| 1658 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
| 1659 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1660 | dev->n_sectors = ata_id_n_sectors(id); |
Tejun Heo | 2940740 | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 1661 | |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1662 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
Jeff Garzik | 591a6e8 | 2007-02-06 21:08:14 -0500 | [diff] [blame] | 1663 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1664 | sizeof(fwrevbuf)); |
| 1665 | |
Jeff Garzik | 591a6e8 | 2007-02-06 21:08:14 -0500 | [diff] [blame] | 1666 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1667 | sizeof(modelbuf)); |
| 1668 | |
| 1669 | if (dev->id[59] & 0x100) |
| 1670 | dev->multi_count = dev->id[59] & 0xff; |
| 1671 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1672 | if (ata_id_has_lba(id)) { |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1673 | const char *lba_desc; |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 1674 | char ncq_desc[20]; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1675 | |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1676 | lba_desc = "LBA"; |
| 1677 | dev->flags |= ATA_DFLAG_LBA; |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1678 | if (ata_id_has_lba48(id)) { |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1679 | dev->flags |= ATA_DFLAG_LBA48; |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1680 | lba_desc = "LBA48"; |
Tejun Heo | 6fc49ad | 2006-11-11 20:10:45 +0900 | [diff] [blame] | 1681 | |
| 1682 | if (dev->n_sectors >= (1UL << 28) && |
| 1683 | ata_id_has_flush_ext(id)) |
| 1684 | dev->flags |= ATA_DFLAG_FLUSH_EXT; |
Tejun Heo | 4c2d721 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 1685 | } |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1686 | |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 1687 | /* config NCQ */ |
| 1688 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); |
| 1689 | |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1690 | /* print device info to dmesg */ |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1691 | if (ata_msg_drv(ap) && print_info) { |
| 1692 | ata_dev_printk(dev, KERN_INFO, |
| 1693 | "%s: %s, %s, max %s\n", |
| 1694 | revbuf, modelbuf, fwrevbuf, |
| 1695 | ata_mode_string(xfer_mask)); |
| 1696 | ata_dev_printk(dev, KERN_INFO, |
| 1697 | "%Lu sectors, multi %u: %s %s\n", |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 1698 | (unsigned long long)dev->n_sectors, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1699 | dev->multi_count, lba_desc, ncq_desc); |
| 1700 | } |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1701 | } else { |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1702 | /* CHS */ |
| 1703 | |
| 1704 | /* Default translation */ |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1705 | dev->cylinders = id[1]; |
| 1706 | dev->heads = id[3]; |
| 1707 | dev->sectors = id[6]; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1708 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1709 | if (ata_id_current_chs_valid(id)) { |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1710 | /* Current CHS translation is valid. */ |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1711 | dev->cylinders = id[54]; |
| 1712 | dev->heads = id[55]; |
| 1713 | dev->sectors = id[56]; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1714 | } |
| 1715 | |
| 1716 | /* print device info to dmesg */ |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1717 | if (ata_msg_drv(ap) && print_info) { |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1718 | ata_dev_printk(dev, KERN_INFO, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1719 | "%s: %s, %s, max %s\n", |
| 1720 | revbuf, modelbuf, fwrevbuf, |
| 1721 | ata_mode_string(xfer_mask)); |
Jeff Garzik | a84471f | 2007-02-26 05:51:33 -0500 | [diff] [blame] | 1722 | ata_dev_printk(dev, KERN_INFO, |
Eric D. Mudama | 3f64f56 | 2007-01-30 23:00:40 -0700 | [diff] [blame] | 1723 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
| 1724 | (unsigned long long)dev->n_sectors, |
| 1725 | dev->multi_count, dev->cylinders, |
| 1726 | dev->heads, dev->sectors); |
| 1727 | } |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 1728 | } |
| 1729 | |
Tejun Heo | 6e7846e | 2006-02-12 23:32:58 +0900 | [diff] [blame] | 1730 | dev->cdb_len = 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | } |
| 1732 | |
| 1733 | /* ATAPI-specific feature tests */ |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 1734 | else if (dev->class == ATA_DEV_ATAPI) { |
Albert Lee | 08a556d | 2006-03-31 13:29:04 +0800 | [diff] [blame] | 1735 | char *cdb_intr_string = ""; |
| 1736 | |
Tejun Heo | 1148c3a | 2006-03-13 19:48:04 +0900 | [diff] [blame] | 1737 | rc = atapi_cdb_len(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1739 | if (ata_msg_warn(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1740 | ata_dev_printk(dev, KERN_WARNING, |
| 1741 | "unsupported CDB len\n"); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1742 | rc = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | goto err_out_nosup; |
| 1744 | } |
Tejun Heo | 6e7846e | 2006-02-12 23:32:58 +0900 | [diff] [blame] | 1745 | dev->cdb_len = (unsigned int) rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | |
Albert Lee | 08a556d | 2006-03-31 13:29:04 +0800 | [diff] [blame] | 1747 | if (ata_id_cdb_intr(dev->id)) { |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 1748 | dev->flags |= ATA_DFLAG_CDB_INTR; |
Albert Lee | 08a556d | 2006-03-31 13:29:04 +0800 | [diff] [blame] | 1749 | cdb_intr_string = ", CDB intr"; |
| 1750 | } |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 1751 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | /* print device info to dmesg */ |
Borislav Petkov | 5afc814 | 2006-06-27 14:51:25 +0200 | [diff] [blame] | 1753 | if (ata_msg_drv(ap) && print_info) |
Tejun Heo | 12436c3 | 2006-05-15 20:59:15 +0900 | [diff] [blame] | 1754 | ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n", |
| 1755 | ata_mode_string(xfer_mask), |
| 1756 | cdb_intr_string); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | } |
| 1758 | |
Tejun Heo | 914ed35 | 2006-11-01 18:39:55 +0900 | [diff] [blame] | 1759 | /* determine max_sectors */ |
| 1760 | dev->max_sectors = ATA_MAX_SECTORS; |
| 1761 | if (dev->flags & ATA_DFLAG_LBA48) |
| 1762 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; |
| 1763 | |
Alan Cox | 9359085 | 2006-09-12 16:55:12 +0100 | [diff] [blame] | 1764 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
| 1765 | /* Let the user know. We don't want to disallow opens for |
| 1766 | rescue purposes, or in case the vendor is just a blithering |
| 1767 | idiot */ |
| 1768 | if (print_info) { |
| 1769 | ata_dev_printk(dev, KERN_WARNING, |
| 1770 | "Drive reports diagnostics failure. This may indicate a drive\n"); |
| 1771 | ata_dev_printk(dev, KERN_WARNING, |
| 1772 | "fault or invalid emulation. Contact drive vendor for information.\n"); |
| 1773 | } |
| 1774 | } |
| 1775 | |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1776 | /* limit bridge transfers to udma5, 200 sectors */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1777 | if (ata_dev_knobble(dev)) { |
Borislav Petkov | 5afc814 | 2006-06-27 14:51:25 +0200 | [diff] [blame] | 1778 | if (ata_msg_drv(ap) && print_info) |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 1779 | ata_dev_printk(dev, KERN_INFO, |
| 1780 | "applying bridge limits\n"); |
Tejun Heo | 5a52913 | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 1781 | dev->udma_mask &= ATA_UDMA5; |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1782 | dev->max_sectors = ATA_MAX_SECTORS; |
| 1783 | } |
| 1784 | |
Albert Lee | 18d6e9d | 2007-04-02 11:34:15 +0800 | [diff] [blame] | 1785 | if (ata_device_blacklisted(dev) & ATA_HORKAGE_MAX_SEC_128) |
| 1786 | dev->max_sectors = min(ATA_MAX_SECTORS_128, dev->max_sectors); |
| 1787 | |
Albert Lee | 6f23a31 | 2007-04-02 11:39:25 +0800 | [diff] [blame] | 1788 | /* limit ATAPI DMA to R/W commands only */ |
| 1789 | if (ata_device_blacklisted(dev) & ATA_HORKAGE_DMA_RW_ONLY) |
| 1790 | dev->horkage |= ATA_HORKAGE_DMA_RW_ONLY; |
| 1791 | |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1792 | if (ap->ops->dev_config) |
Alan | cd0d3bb | 2007-03-02 00:56:15 +0000 | [diff] [blame] | 1793 | ap->ops->dev_config(dev); |
Tejun Heo | 4b2f3ed | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1794 | |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1795 | if (ata_msg_probe(ap)) |
| 1796 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", |
| 1797 | __FUNCTION__, ata_chk_status(ap)); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1798 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | |
| 1800 | err_out_nosup: |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 1801 | if (ata_msg_probe(ap)) |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 1802 | ata_dev_printk(dev, KERN_DEBUG, |
| 1803 | "%s: EXIT, err\n", __FUNCTION__); |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1804 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | } |
| 1806 | |
| 1807 | /** |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 1808 | * ata_cable_40wire - return 40 wire cable type |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 1809 | * @ap: port |
| 1810 | * |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 1811 | * Helper method for drivers which want to hardwire 40 wire cable |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 1812 | * detection. |
| 1813 | */ |
| 1814 | |
| 1815 | int ata_cable_40wire(struct ata_port *ap) |
| 1816 | { |
| 1817 | return ATA_CBL_PATA40; |
| 1818 | } |
| 1819 | |
| 1820 | /** |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 1821 | * ata_cable_80wire - return 80 wire cable type |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 1822 | * @ap: port |
| 1823 | * |
Alan Cox | 2e41e8e | 2007-03-08 23:19:19 +0000 | [diff] [blame] | 1824 | * Helper method for drivers which want to hardwire 80 wire cable |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 1825 | * detection. |
| 1826 | */ |
| 1827 | |
| 1828 | int ata_cable_80wire(struct ata_port *ap) |
| 1829 | { |
| 1830 | return ATA_CBL_PATA80; |
| 1831 | } |
| 1832 | |
| 1833 | /** |
| 1834 | * ata_cable_unknown - return unknown PATA cable. |
| 1835 | * @ap: port |
| 1836 | * |
| 1837 | * Helper method for drivers which have no PATA cable detection. |
| 1838 | */ |
| 1839 | |
| 1840 | int ata_cable_unknown(struct ata_port *ap) |
| 1841 | { |
| 1842 | return ATA_CBL_PATA_UNK; |
| 1843 | } |
| 1844 | |
| 1845 | /** |
| 1846 | * ata_cable_sata - return SATA cable type |
| 1847 | * @ap: port |
| 1848 | * |
| 1849 | * Helper method for drivers which have SATA cables |
| 1850 | */ |
| 1851 | |
| 1852 | int ata_cable_sata(struct ata_port *ap) |
| 1853 | { |
| 1854 | return ATA_CBL_SATA; |
| 1855 | } |
| 1856 | |
| 1857 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | * ata_bus_probe - Reset and probe ATA bus |
| 1859 | * @ap: Bus to probe |
| 1860 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1861 | * Master ATA bus probing function. Initiates a hardware-dependent |
| 1862 | * bus reset, then attempts to identify any devices found on |
| 1863 | * the bus. |
| 1864 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1866 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | * |
| 1868 | * RETURNS: |
Tejun Heo | 96072e6 | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 1869 | * Zero on success, negative errno otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | */ |
| 1871 | |
Brian King | 8028916 | 2006-08-07 14:27:31 -0500 | [diff] [blame] | 1872 | int ata_bus_probe(struct ata_port *ap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | { |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1874 | unsigned int classes[ATA_MAX_DEVICES]; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1875 | int tries[ATA_MAX_DEVICES]; |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 1876 | int i, rc; |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 1877 | struct ata_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1879 | ata_port_probe(ap); |
| 1880 | |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1881 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 1882 | tries[i] = ATA_PROBE_MAX_TRIES; |
| 1883 | |
| 1884 | retry: |
Tejun Heo | 2044470 | 2006-03-13 01:57:01 +0900 | [diff] [blame] | 1885 | /* reset and determine device classes */ |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 1886 | ap->ops->phy_reset(ap); |
Tejun Heo | 2061a47 | 2006-03-12 00:57:39 +0900 | [diff] [blame] | 1887 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 1888 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1889 | dev = &ap->device[i]; |
Tejun Heo | c19ba8a | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 1890 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 1891 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
| 1892 | dev->class != ATA_DEV_UNKNOWN) |
| 1893 | classes[dev->devno] = dev->class; |
| 1894 | else |
| 1895 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | 2044470 | 2006-03-13 01:57:01 +0900 | [diff] [blame] | 1896 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 1897 | dev->class = ATA_DEV_UNKNOWN; |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1898 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 1900 | ata_port_probe(ap); |
Tejun Heo | 2044470 | 2006-03-13 01:57:01 +0900 | [diff] [blame] | 1901 | |
Alan Cox | b6079ca | 2006-05-22 16:52:06 +0100 | [diff] [blame] | 1902 | /* after the reset the device state is PIO 0 and the controller |
| 1903 | state is undefined. Record the mode */ |
| 1904 | |
| 1905 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 1906 | ap->device[i].pio_mode = XFER_PIO_0; |
| 1907 | |
Jeff Garzik | f31f0cc | 2007-03-02 17:47:28 -0500 | [diff] [blame] | 1908 | /* read IDENTIFY page and configure devices. We have to do the identify |
| 1909 | specific sequence bass-ackwards so that PDIAG- is released by |
| 1910 | the slave device */ |
| 1911 | |
| 1912 | for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) { |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 1913 | dev = &ap->device[i]; |
Tejun Heo | 28ca5c5 | 2006-03-01 16:09:36 +0900 | [diff] [blame] | 1914 | |
Tejun Heo | ec57375 | 2006-04-11 22:26:29 +0900 | [diff] [blame] | 1915 | if (tries[i]) |
| 1916 | dev->class = classes[i]; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1917 | |
Tejun Heo | e1211e3 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 1918 | if (!ata_dev_enabled(dev)) |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1919 | continue; |
| 1920 | |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 1921 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
| 1922 | dev->id); |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1923 | if (rc) |
| 1924 | goto fail; |
Jeff Garzik | f31f0cc | 2007-03-02 17:47:28 -0500 | [diff] [blame] | 1925 | } |
| 1926 | |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 1927 | /* Now ask for the cable type as PDIAG- should have been released */ |
| 1928 | if (ap->ops->cable_detect) |
| 1929 | ap->cbl = ap->ops->cable_detect(ap); |
| 1930 | |
Jeff Garzik | f31f0cc | 2007-03-02 17:47:28 -0500 | [diff] [blame] | 1931 | /* After the identify sequence we can now set up the devices. We do |
| 1932 | this in the normal order so that the user doesn't get confused */ |
| 1933 | |
| 1934 | for(i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1935 | dev = &ap->device[i]; |
| 1936 | if (!ata_dev_enabled(dev)) |
| 1937 | continue; |
Tejun Heo | ffeae41 | 2006-03-01 16:09:35 +0900 | [diff] [blame] | 1938 | |
Tejun Heo | efdaedc | 2006-11-01 18:38:52 +0900 | [diff] [blame] | 1939 | ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; |
| 1940 | rc = ata_dev_configure(dev); |
| 1941 | ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1942 | if (rc) |
| 1943 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | } |
| 1945 | |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 1946 | /* configure transfer mode */ |
Tejun Heo | 3adcebb | 2006-05-15 20:57:37 +0900 | [diff] [blame] | 1947 | rc = ata_set_mode(ap, &dev); |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 1948 | if (rc) |
Tejun Heo | 51713d3 | 2006-04-11 22:26:29 +0900 | [diff] [blame] | 1949 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 1951 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 1952 | if (ata_dev_enabled(&ap->device[i])) |
| 1953 | return 0; |
Alan Cox | e35a9e0 | 2006-03-27 18:46:37 +0100 | [diff] [blame] | 1954 | |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 1955 | /* no device present, disable port */ |
| 1956 | ata_port_disable(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | ap->ops->port_disable(ap); |
Tejun Heo | 96072e6 | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 1958 | return -ENODEV; |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1959 | |
| 1960 | fail: |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 1961 | tries[dev->devno]--; |
| 1962 | |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1963 | switch (rc) { |
| 1964 | case -EINVAL: |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 1965 | /* eeek, something went very wrong, give up */ |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1966 | tries[dev->devno] = 0; |
| 1967 | break; |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 1968 | |
| 1969 | case -ENODEV: |
| 1970 | /* give it just one more chance */ |
| 1971 | tries[dev->devno] = min(tries[dev->devno], 1); |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1972 | case -EIO: |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 1973 | if (tries[dev->devno] == 1) { |
| 1974 | /* This is the last chance, better to slow |
| 1975 | * down than lose it. |
| 1976 | */ |
| 1977 | sata_down_spd_limit(ap); |
| 1978 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
| 1979 | } |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1980 | } |
| 1981 | |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 1982 | if (!tries[dev->devno]) |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1983 | ata_dev_disable(dev); |
Tejun Heo | ec57375 | 2006-04-11 22:26:29 +0900 | [diff] [blame] | 1984 | |
Tejun Heo | 14d2bac | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 1985 | goto retry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | } |
| 1987 | |
| 1988 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1989 | * ata_port_probe - Mark port as enabled |
| 1990 | * @ap: Port for which we indicate enablement |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1992 | * Modify @ap data structure such that the system |
| 1993 | * thinks that the entire port is enabled. |
| 1994 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 1995 | * LOCKING: host lock, or some other form of |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1996 | * serialization. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | */ |
| 1998 | |
| 1999 | void ata_port_probe(struct ata_port *ap) |
| 2000 | { |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2001 | ap->flags &= ~ATA_FLAG_DISABLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | } |
| 2003 | |
| 2004 | /** |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2005 | * sata_print_link_status - Print SATA link status |
| 2006 | * @ap: SATA port to printk link status about |
| 2007 | * |
| 2008 | * This function prints link speed and status of a SATA link. |
| 2009 | * |
| 2010 | * LOCKING: |
| 2011 | * None. |
| 2012 | */ |
Jeff Garzik | 43727fb | 2007-02-25 16:50:52 -0500 | [diff] [blame] | 2013 | void sata_print_link_status(struct ata_port *ap) |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2014 | { |
Tejun Heo | 6d5f973 | 2006-04-03 00:09:41 +0900 | [diff] [blame] | 2015 | u32 sstatus, scontrol, tmp; |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2016 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2017 | if (sata_scr_read(ap, SCR_STATUS, &sstatus)) |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2018 | return; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2019 | sata_scr_read(ap, SCR_CONTROL, &scontrol); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2020 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2021 | if (ata_port_online(ap)) { |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2022 | tmp = (sstatus >> 4) & 0xf; |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2023 | ata_port_printk(ap, KERN_INFO, |
| 2024 | "SATA link up %s (SStatus %X SControl %X)\n", |
| 2025 | sata_spd_string(tmp), sstatus, scontrol); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2026 | } else { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2027 | ata_port_printk(ap, KERN_INFO, |
| 2028 | "SATA link down (SStatus %X SControl %X)\n", |
| 2029 | sstatus, scontrol); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2030 | } |
| 2031 | } |
| 2032 | |
| 2033 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2034 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
| 2035 | * @ap: SATA port associated with target SATA PHY. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2037 | * This function issues commands to standard SATA Sxxx |
| 2038 | * PHY registers, to wake up the phy (and device), and |
| 2039 | * clear any reset condition. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2040 | * |
| 2041 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2042 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | * |
| 2044 | */ |
| 2045 | void __sata_phy_reset(struct ata_port *ap) |
| 2046 | { |
| 2047 | u32 sstatus; |
| 2048 | unsigned long timeout = jiffies + (HZ * 5); |
| 2049 | |
| 2050 | if (ap->flags & ATA_FLAG_SATA_RESET) { |
Brett Russ | cdcca89e | 2005-03-28 15:10:27 -0500 | [diff] [blame] | 2051 | /* issue phy wake/reset */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2052 | sata_scr_write_flush(ap, SCR_CONTROL, 0x301); |
Tejun Heo | 62ba284 | 2005-06-26 23:27:19 +0900 | [diff] [blame] | 2053 | /* Couldn't find anything in SATA I/II specs, but |
| 2054 | * AHCI-1.1 10.4.2 says at least 1 ms. */ |
| 2055 | mdelay(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | } |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2057 | /* phy wake/clear reset */ |
| 2058 | sata_scr_write_flush(ap, SCR_CONTROL, 0x300); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | |
| 2060 | /* wait for phy to become ready, if necessary */ |
| 2061 | do { |
| 2062 | msleep(200); |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2063 | sata_scr_read(ap, SCR_STATUS, &sstatus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | if ((sstatus & 0xf) != 1) |
| 2065 | break; |
| 2066 | } while (time_before(jiffies, timeout)); |
| 2067 | |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2068 | /* print link status */ |
| 2069 | sata_print_link_status(ap); |
Jeff Garzik | 656563e | 2005-11-20 03:36:45 -0500 | [diff] [blame] | 2070 | |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2071 | /* TODO: phy layer with polling, timeouts, etc. */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2072 | if (!ata_port_offline(ap)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | ata_port_probe(ap); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 2074 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | ata_port_disable(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2077 | if (ap->flags & ATA_FLAG_DISABLED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | return; |
| 2079 | |
| 2080 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { |
| 2081 | ata_port_disable(ap); |
| 2082 | return; |
| 2083 | } |
| 2084 | |
| 2085 | ap->cbl = ATA_CBL_SATA; |
| 2086 | } |
| 2087 | |
| 2088 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2089 | * sata_phy_reset - Reset SATA bus. |
| 2090 | * @ap: SATA port associated with target SATA PHY. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2092 | * This function resets the SATA bus, and then probes |
| 2093 | * the bus for devices. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | * |
| 2095 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2096 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | * |
| 2098 | */ |
| 2099 | void sata_phy_reset(struct ata_port *ap) |
| 2100 | { |
| 2101 | __sata_phy_reset(ap); |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2102 | if (ap->flags & ATA_FLAG_DISABLED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | return; |
| 2104 | ata_bus_reset(ap); |
| 2105 | } |
| 2106 | |
| 2107 | /** |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2108 | * ata_dev_pair - return other device on cable |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2109 | * @adev: device |
| 2110 | * |
| 2111 | * Obtain the other device on the same cable, or if none is |
| 2112 | * present NULL is returned |
| 2113 | */ |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2114 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2115 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2116 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2117 | struct ata_port *ap = adev->ap; |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2118 | struct ata_device *pair = &ap->device[1 - adev->devno]; |
Tejun Heo | e1211e3 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2119 | if (!ata_dev_enabled(pair)) |
Alan Cox | ebdfca6 | 2006-03-23 15:38:34 +0000 | [diff] [blame] | 2120 | return NULL; |
| 2121 | return pair; |
| 2122 | } |
| 2123 | |
| 2124 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2125 | * ata_port_disable - Disable port. |
| 2126 | * @ap: Port to be disabled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2128 | * Modify @ap data structure such that the system |
| 2129 | * thinks that the entire port is disabled, and should |
| 2130 | * never attempt to probe or communicate with devices |
| 2131 | * on this port. |
| 2132 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2133 | * LOCKING: host lock, or some other form of |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2134 | * serialization. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | */ |
| 2136 | |
| 2137 | void ata_port_disable(struct ata_port *ap) |
| 2138 | { |
| 2139 | ap->device[0].class = ATA_DEV_NONE; |
| 2140 | ap->device[1].class = ATA_DEV_NONE; |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2141 | ap->flags |= ATA_FLAG_DISABLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | } |
| 2143 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2144 | /** |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2145 | * sata_down_spd_limit - adjust SATA spd limit downward |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2146 | * @ap: Port to adjust SATA spd limit for |
| 2147 | * |
| 2148 | * Adjust SATA spd limit of @ap downward. Note that this |
| 2149 | * function only adjusts the limit. The change must be applied |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2150 | * using sata_set_spd(). |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2151 | * |
| 2152 | * LOCKING: |
| 2153 | * Inherited from caller. |
| 2154 | * |
| 2155 | * RETURNS: |
| 2156 | * 0 on success, negative errno on failure |
| 2157 | */ |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2158 | int sata_down_spd_limit(struct ata_port *ap) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2159 | { |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2160 | u32 sstatus, spd, mask; |
| 2161 | int rc, highbit; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2162 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2163 | rc = sata_scr_read(ap, SCR_STATUS, &sstatus); |
| 2164 | if (rc) |
| 2165 | return rc; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2166 | |
| 2167 | mask = ap->sata_spd_limit; |
| 2168 | if (mask <= 1) |
| 2169 | return -EINVAL; |
| 2170 | highbit = fls(mask) - 1; |
| 2171 | mask &= ~(1 << highbit); |
| 2172 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2173 | spd = (sstatus >> 4) & 0xf; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2174 | if (spd <= 1) |
| 2175 | return -EINVAL; |
| 2176 | spd--; |
| 2177 | mask &= (1 << spd) - 1; |
| 2178 | if (!mask) |
| 2179 | return -EINVAL; |
| 2180 | |
| 2181 | ap->sata_spd_limit = mask; |
| 2182 | |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2183 | ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", |
| 2184 | sata_spd_string(fls(mask))); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2185 | |
| 2186 | return 0; |
| 2187 | } |
| 2188 | |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2189 | static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2190 | { |
| 2191 | u32 spd, limit; |
| 2192 | |
| 2193 | if (ap->sata_spd_limit == UINT_MAX) |
| 2194 | limit = 0; |
| 2195 | else |
| 2196 | limit = fls(ap->sata_spd_limit); |
| 2197 | |
| 2198 | spd = (*scontrol >> 4) & 0xf; |
| 2199 | *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); |
| 2200 | |
| 2201 | return spd != limit; |
| 2202 | } |
| 2203 | |
| 2204 | /** |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2205 | * sata_set_spd_needed - is SATA spd configuration needed |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2206 | * @ap: Port in question |
| 2207 | * |
| 2208 | * Test whether the spd limit in SControl matches |
| 2209 | * @ap->sata_spd_limit. This function is used to determine |
| 2210 | * whether hardreset is necessary to apply SATA spd |
| 2211 | * configuration. |
| 2212 | * |
| 2213 | * LOCKING: |
| 2214 | * Inherited from caller. |
| 2215 | * |
| 2216 | * RETURNS: |
| 2217 | * 1 if SATA spd configuration is needed, 0 otherwise. |
| 2218 | */ |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2219 | int sata_set_spd_needed(struct ata_port *ap) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2220 | { |
| 2221 | u32 scontrol; |
| 2222 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2223 | if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2224 | return 0; |
| 2225 | |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2226 | return __sata_set_spd_needed(ap, &scontrol); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2227 | } |
| 2228 | |
| 2229 | /** |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2230 | * sata_set_spd - set SATA spd according to spd limit |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2231 | * @ap: Port to set SATA spd for |
| 2232 | * |
| 2233 | * Set SATA spd of @ap according to sata_spd_limit. |
| 2234 | * |
| 2235 | * LOCKING: |
| 2236 | * Inherited from caller. |
| 2237 | * |
| 2238 | * RETURNS: |
| 2239 | * 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] | 2240 | * changed. Negative errno if SCR registers are inaccessible. |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2241 | */ |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2242 | int sata_set_spd(struct ata_port *ap) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2243 | { |
| 2244 | u32 scontrol; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2245 | int rc; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2246 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2247 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
| 2248 | return rc; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2249 | |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 2250 | if (!__sata_set_spd_needed(ap, &scontrol)) |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2251 | return 0; |
| 2252 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2253 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) |
| 2254 | return rc; |
| 2255 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 2256 | return 1; |
| 2257 | } |
| 2258 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2259 | /* |
| 2260 | * This mode timing computation functionality is ported over from |
| 2261 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik |
| 2262 | */ |
| 2263 | /* |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2264 | * 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] | 2265 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2266 | * for UDMA6, which is currently supported only by Maxtor drives. |
| 2267 | * |
| 2268 | * 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] | 2269 | */ |
| 2270 | |
| 2271 | static const struct ata_timing ata_timing[] = { |
| 2272 | |
| 2273 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, |
| 2274 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, |
| 2275 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, |
| 2276 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, |
| 2277 | |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2278 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
| 2279 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2280 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, |
| 2281 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, |
| 2282 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, |
| 2283 | |
| 2284 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2285 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2286 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
| 2287 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, |
| 2288 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2289 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2290 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
| 2291 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, |
| 2292 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, |
| 2293 | |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 2294 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, |
| 2295 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2296 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, |
| 2297 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, |
| 2298 | |
| 2299 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, |
| 2300 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, |
| 2301 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, |
| 2302 | |
| 2303 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ |
| 2304 | |
| 2305 | { 0xFF } |
| 2306 | }; |
| 2307 | |
| 2308 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) |
| 2309 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) |
| 2310 | |
| 2311 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) |
| 2312 | { |
| 2313 | q->setup = EZ(t->setup * 1000, T); |
| 2314 | q->act8b = EZ(t->act8b * 1000, T); |
| 2315 | q->rec8b = EZ(t->rec8b * 1000, T); |
| 2316 | q->cyc8b = EZ(t->cyc8b * 1000, T); |
| 2317 | q->active = EZ(t->active * 1000, T); |
| 2318 | q->recover = EZ(t->recover * 1000, T); |
| 2319 | q->cycle = EZ(t->cycle * 1000, T); |
| 2320 | q->udma = EZ(t->udma * 1000, UT); |
| 2321 | } |
| 2322 | |
| 2323 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, |
| 2324 | struct ata_timing *m, unsigned int what) |
| 2325 | { |
| 2326 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); |
| 2327 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); |
| 2328 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); |
| 2329 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); |
| 2330 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); |
| 2331 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); |
| 2332 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); |
| 2333 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); |
| 2334 | } |
| 2335 | |
| 2336 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) |
| 2337 | { |
| 2338 | const struct ata_timing *t; |
| 2339 | |
| 2340 | for (t = ata_timing; t->mode != speed; t++) |
Alan Cox | 9119075 | 2005-10-26 12:17:46 -0400 | [diff] [blame] | 2341 | if (t->mode == 0xFF) |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2342 | return NULL; |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2343 | return t; |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2344 | } |
| 2345 | |
| 2346 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, |
| 2347 | struct ata_timing *t, int T, int UT) |
| 2348 | { |
| 2349 | const struct ata_timing *s; |
| 2350 | struct ata_timing p; |
| 2351 | |
| 2352 | /* |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2353 | * Find the mode. |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 2354 | */ |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2355 | |
| 2356 | if (!(s = ata_timing_find_mode(speed))) |
| 2357 | return -EINVAL; |
| 2358 | |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 2359 | memcpy(t, s, sizeof(*s)); |
| 2360 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2361 | /* |
| 2362 | * If the drive is an EIDE drive, it can tell us it needs extended |
| 2363 | * PIO/MW_DMA cycle timing. |
| 2364 | */ |
| 2365 | |
| 2366 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ |
| 2367 | memset(&p, 0, sizeof(p)); |
| 2368 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
| 2369 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
| 2370 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; |
| 2371 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
| 2372 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
| 2373 | } |
| 2374 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); |
| 2375 | } |
| 2376 | |
| 2377 | /* |
| 2378 | * Convert the timing to bus clock counts. |
| 2379 | */ |
| 2380 | |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 2381 | ata_timing_quantize(t, t, T, UT); |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2382 | |
| 2383 | /* |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 2384 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
| 2385 | * S.M.A.R.T * and some other commands. We have to ensure that the |
| 2386 | * DMA cycle timing is slower/equal than the fastest PIO timing. |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2387 | */ |
| 2388 | |
Alan | fd3367af | 2006-12-07 12:41:18 +0000 | [diff] [blame] | 2389 | if (speed > XFER_PIO_6) { |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2390 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
| 2391 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); |
| 2392 | } |
| 2393 | |
| 2394 | /* |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 2395 | * Lengthen active & recovery time so that cycle time is correct. |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 2396 | */ |
| 2397 | |
| 2398 | if (t->act8b + t->rec8b < t->cyc8b) { |
| 2399 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; |
| 2400 | t->rec8b = t->cyc8b - t->act8b; |
| 2401 | } |
| 2402 | |
| 2403 | if (t->active + t->recover < t->cycle) { |
| 2404 | t->active += (t->cycle - (t->active + t->recover)) / 2; |
| 2405 | t->recover = t->cycle - t->active; |
| 2406 | } |
| 2407 | |
| 2408 | return 0; |
| 2409 | } |
| 2410 | |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2411 | /** |
| 2412 | * ata_down_xfermask_limit - adjust dev xfer masks downward |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2413 | * @dev: Device to adjust xfer masks |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2414 | * @sel: ATA_DNXFER_* selector |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2415 | * |
| 2416 | * Adjust xfer masks of @dev downward. Note that this function |
| 2417 | * does not apply the change. Invoking ata_set_mode() afterwards |
| 2418 | * will apply the limit. |
| 2419 | * |
| 2420 | * LOCKING: |
| 2421 | * Inherited from caller. |
| 2422 | * |
| 2423 | * RETURNS: |
| 2424 | * 0 on success, negative errno on failure |
| 2425 | */ |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2426 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2427 | { |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2428 | char buf[32]; |
| 2429 | unsigned int orig_mask, xfer_mask; |
| 2430 | unsigned int pio_mask, mwdma_mask, udma_mask; |
| 2431 | int quiet, highbit; |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2432 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2433 | quiet = !!(sel & ATA_DNXFER_QUIET); |
| 2434 | sel &= ~ATA_DNXFER_QUIET; |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2435 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2436 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
| 2437 | dev->mwdma_mask, |
| 2438 | dev->udma_mask); |
| 2439 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2440 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2441 | switch (sel) { |
| 2442 | case ATA_DNXFER_PIO: |
| 2443 | highbit = fls(pio_mask) - 1; |
| 2444 | pio_mask &= ~(1 << highbit); |
| 2445 | break; |
| 2446 | |
| 2447 | case ATA_DNXFER_DMA: |
| 2448 | if (udma_mask) { |
| 2449 | highbit = fls(udma_mask) - 1; |
| 2450 | udma_mask &= ~(1 << highbit); |
| 2451 | if (!udma_mask) |
| 2452 | return -ENOENT; |
| 2453 | } else if (mwdma_mask) { |
| 2454 | highbit = fls(mwdma_mask) - 1; |
| 2455 | mwdma_mask &= ~(1 << highbit); |
| 2456 | if (!mwdma_mask) |
| 2457 | return -ENOENT; |
| 2458 | } |
| 2459 | break; |
| 2460 | |
| 2461 | case ATA_DNXFER_40C: |
| 2462 | udma_mask &= ATA_UDMA_MASK_40C; |
| 2463 | break; |
| 2464 | |
| 2465 | case ATA_DNXFER_FORCE_PIO0: |
| 2466 | pio_mask &= 1; |
| 2467 | case ATA_DNXFER_FORCE_PIO: |
| 2468 | mwdma_mask = 0; |
| 2469 | udma_mask = 0; |
| 2470 | break; |
| 2471 | |
Tejun Heo | 458337d | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 2472 | default: |
| 2473 | BUG(); |
| 2474 | } |
| 2475 | |
| 2476 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
| 2477 | |
| 2478 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) |
| 2479 | return -ENOENT; |
| 2480 | |
| 2481 | if (!quiet) { |
| 2482 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) |
| 2483 | snprintf(buf, sizeof(buf), "%s:%s", |
| 2484 | ata_mode_string(xfer_mask), |
| 2485 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); |
| 2486 | else |
| 2487 | snprintf(buf, sizeof(buf), "%s", |
| 2488 | ata_mode_string(xfer_mask)); |
| 2489 | |
| 2490 | ata_dev_printk(dev, KERN_WARNING, |
| 2491 | "limiting speed to %s\n", buf); |
| 2492 | } |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2493 | |
| 2494 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, |
| 2495 | &dev->udma_mask); |
| 2496 | |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2497 | return 0; |
Tejun Heo | cf176e1 | 2006-04-02 17:54:46 +0900 | [diff] [blame] | 2498 | } |
| 2499 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2500 | static int ata_dev_set_mode(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2501 | { |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 2502 | struct ata_eh_context *ehc = &dev->ap->eh_context; |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2503 | unsigned int err_mask; |
| 2504 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2505 | |
Tejun Heo | e838460 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 2506 | dev->flags &= ~ATA_DFLAG_PIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
| 2508 | dev->flags |= ATA_DFLAG_PIO; |
| 2509 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2510 | err_mask = ata_dev_set_xfermode(dev); |
Alan | 11750a4 | 2007-02-05 16:28:30 +0000 | [diff] [blame] | 2511 | /* Old CFA may refuse this command, which is just fine */ |
| 2512 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) |
| 2513 | err_mask &= ~AC_ERR_DEV; |
| 2514 | |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2515 | if (err_mask) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2516 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " |
| 2517 | "(err_mask=0x%x)\n", err_mask); |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2518 | return -EIO; |
| 2519 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2520 | |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 2521 | ehc->i.flags |= ATA_EHI_POST_SETMODE; |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2522 | rc = ata_dev_revalidate(dev, 0); |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 2523 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; |
Tejun Heo | 5eb45c0 | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2524 | if (rc) |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2525 | return rc; |
Tejun Heo | 48a8a14 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 2526 | |
Tejun Heo | 23e71c3 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2527 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
| 2528 | dev->xfer_shift, (int)dev->xfer_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2530 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", |
| 2531 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2532 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2533 | } |
| 2534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2535 | /** |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 2536 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | * @ap: port on which timings will be programmed |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2538 | * @r_failed_dev: out paramter for failed device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | * |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 2540 | * Standard implementation of the function used to tune and set |
| 2541 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
| 2542 | * ata_dev_set_mode() fails, pointer to the failing device is |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2543 | * returned in @r_failed_dev. |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2544 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2546 | * PCI/etc. bus probe sem. |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2547 | * |
| 2548 | * RETURNS: |
| 2549 | * 0 on success, negative errno otherwise |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | */ |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 2551 | |
| 2552 | 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] | 2553 | { |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2554 | struct ata_device *dev; |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2555 | int i, rc = 0, used_dma = 0, found = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2556 | |
Tejun Heo | 3adcebb | 2006-05-15 20:57:37 +0900 | [diff] [blame] | 2557 | |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2558 | /* step 1: calculate xfer_mask */ |
| 2559 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 2560 | unsigned int pio_mask, dma_mask; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2561 | |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2562 | dev = &ap->device[i]; |
| 2563 | |
Tejun Heo | e1211e3 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2564 | if (!ata_dev_enabled(dev)) |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2565 | continue; |
| 2566 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2567 | ata_dev_xfermask(dev); |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2568 | |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 2569 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
| 2570 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); |
| 2571 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
| 2572 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 2573 | |
Tejun Heo | 4f65977 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2574 | found = 1; |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 2575 | if (dev->dma_mode) |
| 2576 | used_dma = 1; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2577 | } |
Tejun Heo | 4f65977 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2578 | if (!found) |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2579 | goto out; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2580 | |
| 2581 | /* step 2: always set host PIO timings */ |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2582 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 2583 | dev = &ap->device[i]; |
| 2584 | if (!ata_dev_enabled(dev)) |
| 2585 | continue; |
| 2586 | |
| 2587 | if (!dev->pio_mode) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2588 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2589 | rc = -EINVAL; |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2590 | goto out; |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2591 | } |
| 2592 | |
| 2593 | dev->xfer_mode = dev->pio_mode; |
| 2594 | dev->xfer_shift = ATA_SHIFT_PIO; |
| 2595 | if (ap->ops->set_piomode) |
| 2596 | ap->ops->set_piomode(ap, dev); |
| 2597 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 2599 | /* step 3: set host DMA timings */ |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2600 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 2601 | dev = &ap->device[i]; |
| 2602 | |
| 2603 | if (!ata_dev_enabled(dev) || !dev->dma_mode) |
| 2604 | continue; |
| 2605 | |
| 2606 | dev->xfer_mode = dev->dma_mode; |
| 2607 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); |
| 2608 | if (ap->ops->set_dmamode) |
| 2609 | ap->ops->set_dmamode(ap, dev); |
| 2610 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | |
| 2612 | /* step 4: update devices' xfer mode */ |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2613 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2614 | dev = &ap->device[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2615 | |
Alan | 18d90de | 2007-01-24 11:42:38 +0000 | [diff] [blame] | 2616 | /* don't update suspended devices' xfer mode */ |
Tejun Heo | 02670bf | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 2617 | if (!ata_dev_ready(dev)) |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2618 | continue; |
| 2619 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2620 | rc = ata_dev_set_mode(dev); |
Tejun Heo | 5bbc53f | 2006-04-01 01:38:17 +0900 | [diff] [blame] | 2621 | if (rc) |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2622 | goto out; |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 2623 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2624 | |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2625 | /* Record simplex status. If we selected DMA then the other |
| 2626 | * host channels are not permitted to do so. |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 2627 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2628 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
Alan | 032af1c | 2007-03-01 17:36:46 +0000 | [diff] [blame] | 2629 | ap->host->simplex_claimed = ap; |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 2630 | |
Tejun Heo | e8e0619 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2631 | /* step5: chip specific finalisation */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | if (ap->ops->post_set_mode) |
| 2633 | ap->ops->post_set_mode(ap); |
Tejun Heo | e82cbdb | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2634 | out: |
| 2635 | if (rc) |
| 2636 | *r_failed_dev = dev; |
| 2637 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | } |
| 2639 | |
| 2640 | /** |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 2641 | * ata_set_mode - Program timings and issue SET FEATURES - XFER |
| 2642 | * @ap: port on which timings will be programmed |
| 2643 | * @r_failed_dev: out paramter for failed device |
| 2644 | * |
| 2645 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
| 2646 | * ata_set_mode() fails, pointer to the failing device is |
| 2647 | * returned in @r_failed_dev. |
| 2648 | * |
| 2649 | * LOCKING: |
| 2650 | * PCI/etc. bus probe sem. |
| 2651 | * |
| 2652 | * RETURNS: |
| 2653 | * 0 on success, negative errno otherwise |
| 2654 | */ |
| 2655 | int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) |
| 2656 | { |
| 2657 | /* has private set_mode? */ |
| 2658 | if (ap->ops->set_mode) |
| 2659 | return ap->ops->set_mode(ap, r_failed_dev); |
| 2660 | return ata_do_set_mode(ap, r_failed_dev); |
| 2661 | } |
| 2662 | |
| 2663 | /** |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2664 | * ata_tf_to_host - issue ATA taskfile to host controller |
| 2665 | * @ap: port to which command is being issued |
| 2666 | * @tf: ATA taskfile register set |
| 2667 | * |
| 2668 | * Issues ATA taskfile register set to ATA host controller, |
| 2669 | * with proper synchronization with interrupt handler and |
| 2670 | * other threads. |
| 2671 | * |
| 2672 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2673 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2674 | */ |
| 2675 | |
| 2676 | static inline void ata_tf_to_host(struct ata_port *ap, |
| 2677 | const struct ata_taskfile *tf) |
| 2678 | { |
| 2679 | ap->ops->tf_load(ap, tf); |
| 2680 | ap->ops->exec_command(ap, tf); |
| 2681 | } |
| 2682 | |
| 2683 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2684 | * ata_busy_sleep - sleep until BSY clears, or timeout |
| 2685 | * @ap: port containing status register to be polled |
| 2686 | * @tmout_pat: impatience timeout |
| 2687 | * @tmout: overall timeout |
| 2688 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2689 | * Sleep until ATA Status register bit BSY clears, |
| 2690 | * or a timeout occurs. |
| 2691 | * |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2692 | * LOCKING: |
| 2693 | * Kernel thread context (may sleep). |
| 2694 | * |
| 2695 | * RETURNS: |
| 2696 | * 0 on success, -errno otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2697 | */ |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2698 | int ata_busy_sleep(struct ata_port *ap, |
| 2699 | unsigned long tmout_pat, unsigned long tmout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2700 | { |
| 2701 | unsigned long timer_start, timeout; |
| 2702 | u8 status; |
| 2703 | |
| 2704 | status = ata_busy_wait(ap, ATA_BUSY, 300); |
| 2705 | timer_start = jiffies; |
| 2706 | timeout = timer_start + tmout_pat; |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2707 | while (status != 0xff && (status & ATA_BUSY) && |
| 2708 | time_before(jiffies, timeout)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2709 | msleep(50); |
| 2710 | status = ata_busy_wait(ap, ATA_BUSY, 3); |
| 2711 | } |
| 2712 | |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2713 | if (status != 0xff && (status & ATA_BUSY)) |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2714 | ata_port_printk(ap, KERN_WARNING, |
Jeff Garzik | 35aa7a4 | 2006-09-28 06:50:24 -0400 | [diff] [blame] | 2715 | "port is slow to respond, please be patient " |
| 2716 | "(Status 0x%x)\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2717 | |
| 2718 | timeout = timer_start + tmout; |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2719 | while (status != 0xff && (status & ATA_BUSY) && |
| 2720 | time_before(jiffies, timeout)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2721 | msleep(50); |
| 2722 | status = ata_chk_status(ap); |
| 2723 | } |
| 2724 | |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2725 | if (status == 0xff) |
| 2726 | return -ENODEV; |
| 2727 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2728 | if (status & ATA_BUSY) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2729 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
Jeff Garzik | 35aa7a4 | 2006-09-28 06:50:24 -0400 | [diff] [blame] | 2730 | "(%lu secs, Status 0x%x)\n", |
| 2731 | tmout / HZ, status); |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2732 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | } |
| 2734 | |
| 2735 | return 0; |
| 2736 | } |
| 2737 | |
| 2738 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) |
| 2739 | { |
| 2740 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 2741 | unsigned int dev0 = devmask & (1 << 0); |
| 2742 | unsigned int dev1 = devmask & (1 << 1); |
| 2743 | unsigned long timeout; |
| 2744 | |
| 2745 | /* if device 0 was found in ata_devchk, wait for its |
| 2746 | * BSY bit to clear |
| 2747 | */ |
| 2748 | if (dev0) |
| 2749 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 2750 | |
| 2751 | /* if device 1 was found in ata_devchk, wait for |
| 2752 | * register access, then wait for BSY to clear |
| 2753 | */ |
| 2754 | timeout = jiffies + ATA_TMOUT_BOOT; |
| 2755 | while (dev1) { |
| 2756 | u8 nsect, lbal; |
| 2757 | |
| 2758 | ap->ops->dev_select(ap, 1); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 2759 | nsect = ioread8(ioaddr->nsect_addr); |
| 2760 | lbal = ioread8(ioaddr->lbal_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2761 | if ((nsect == 1) && (lbal == 1)) |
| 2762 | break; |
| 2763 | if (time_after(jiffies, timeout)) { |
| 2764 | dev1 = 0; |
| 2765 | break; |
| 2766 | } |
| 2767 | msleep(50); /* give drive a breather */ |
| 2768 | } |
| 2769 | if (dev1) |
| 2770 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 2771 | |
| 2772 | /* is all this really necessary? */ |
| 2773 | ap->ops->dev_select(ap, 0); |
| 2774 | if (dev1) |
| 2775 | ap->ops->dev_select(ap, 1); |
| 2776 | if (dev0) |
| 2777 | ap->ops->dev_select(ap, 0); |
| 2778 | } |
| 2779 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2780 | static unsigned int ata_bus_softreset(struct ata_port *ap, |
| 2781 | unsigned int devmask) |
| 2782 | { |
| 2783 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 2784 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 2785 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2786 | |
| 2787 | /* software reset. causes dev0 to be selected */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 2788 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
| 2789 | udelay(20); /* FIXME: flush */ |
| 2790 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); |
| 2791 | udelay(20); /* FIXME: flush */ |
| 2792 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2793 | |
| 2794 | /* spec mandates ">= 2ms" before checking status. |
| 2795 | * We wait 150ms, because that was the magic delay used for |
| 2796 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time |
| 2797 | * between when the ATA command register is written, and then |
| 2798 | * status is checked. Because waiting for "a while" before |
| 2799 | * checking status is fine, post SRST, we perform this magic |
| 2800 | * delay here as well. |
Alan Cox | 09c7ad7 | 2006-03-22 15:52:40 +0000 | [diff] [blame] | 2801 | * |
| 2802 | * Old drivers/ide uses the 2mS rule and then waits for ready |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2803 | */ |
| 2804 | msleep(150); |
| 2805 | |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 2806 | /* Before we perform post reset processing we want to see if |
Tejun Heo | 298a41c | 2006-03-25 02:58:13 +0900 | [diff] [blame] | 2807 | * the bus shows 0xFF because the odd clown forgets the D7 |
| 2808 | * pulldown resistor. |
| 2809 | */ |
Tejun Heo | d1adc1b | 2006-10-09 18:32:15 +0900 | [diff] [blame] | 2810 | if (ata_check_status(ap) == 0xFF) |
| 2811 | return 0; |
Alan Cox | 09c7ad7 | 2006-03-22 15:52:40 +0000 | [diff] [blame] | 2812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2813 | ata_bus_post_reset(ap, devmask); |
| 2814 | |
| 2815 | return 0; |
| 2816 | } |
| 2817 | |
| 2818 | /** |
| 2819 | * ata_bus_reset - reset host port and associated ATA channel |
| 2820 | * @ap: port to reset |
| 2821 | * |
| 2822 | * This is typically the first time we actually start issuing |
| 2823 | * commands to the ATA channel. We wait for BSY to clear, then |
| 2824 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its |
| 2825 | * result. Determine what devices, if any, are on the channel |
| 2826 | * by looking at the device 0/1 error register. Look at the signature |
| 2827 | * stored in each device's taskfile registers, to determine if |
| 2828 | * the device is ATA or ATAPI. |
| 2829 | * |
| 2830 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2831 | * PCI/etc. bus probe sem. |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 2832 | * Obtains host lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2833 | * |
| 2834 | * SIDE EFFECTS: |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2835 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2836 | */ |
| 2837 | |
| 2838 | void ata_bus_reset(struct ata_port *ap) |
| 2839 | { |
| 2840 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 2841 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
| 2842 | u8 err; |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 2843 | unsigned int dev0, dev1 = 0, devmask = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2844 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 2845 | 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] | 2846 | |
| 2847 | /* determine if device 0/1 are present */ |
| 2848 | if (ap->flags & ATA_FLAG_SATA_RESET) |
| 2849 | dev0 = 1; |
| 2850 | else { |
| 2851 | dev0 = ata_devchk(ap, 0); |
| 2852 | if (slave_possible) |
| 2853 | dev1 = ata_devchk(ap, 1); |
| 2854 | } |
| 2855 | |
| 2856 | if (dev0) |
| 2857 | devmask |= (1 << 0); |
| 2858 | if (dev1) |
| 2859 | devmask |= (1 << 1); |
| 2860 | |
| 2861 | /* select device 0 again */ |
| 2862 | ap->ops->dev_select(ap, 0); |
| 2863 | |
| 2864 | /* issue bus reset */ |
| 2865 | if (ap->flags & ATA_FLAG_SRST) |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 2866 | if (ata_bus_softreset(ap, devmask)) |
| 2867 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2868 | |
| 2869 | /* |
| 2870 | * determine by signature whether we have ATA or ATAPI devices |
| 2871 | */ |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 2872 | ap->device[0].class = ata_dev_try_classify(ap, 0, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | if ((slave_possible) && (err != 0x81)) |
Tejun Heo | b4dc762 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 2874 | ap->device[1].class = ata_dev_try_classify(ap, 1, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2875 | |
| 2876 | /* re-enable interrupts */ |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 2877 | ap->ops->irq_on(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2878 | |
| 2879 | /* is double-select really necessary? */ |
| 2880 | if (ap->device[1].class != ATA_DEV_NONE) |
| 2881 | ap->ops->dev_select(ap, 1); |
| 2882 | if (ap->device[0].class != ATA_DEV_NONE) |
| 2883 | ap->ops->dev_select(ap, 0); |
| 2884 | |
| 2885 | /* if no devices were detected, disable this port */ |
| 2886 | if ((ap->device[0].class == ATA_DEV_NONE) && |
| 2887 | (ap->device[1].class == ATA_DEV_NONE)) |
| 2888 | goto err_out; |
| 2889 | |
| 2890 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { |
| 2891 | /* set up device control for ATA_FLAG_SATA_RESET */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 2892 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2893 | } |
| 2894 | |
| 2895 | DPRINTK("EXIT\n"); |
| 2896 | return; |
| 2897 | |
| 2898 | err_out: |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2899 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2900 | ap->ops->port_disable(ap); |
| 2901 | |
| 2902 | DPRINTK("EXIT\n"); |
| 2903 | } |
| 2904 | |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 2905 | /** |
| 2906 | * sata_phy_debounce - debounce SATA phy status |
| 2907 | * @ap: ATA port to debounce SATA phy status for |
| 2908 | * @params: timing parameters { interval, duratinon, timeout } in msec |
| 2909 | * |
| 2910 | * Make sure SStatus of @ap reaches stable state, determined by |
| 2911 | * holding the same value where DET is not 1 for @duration polled |
| 2912 | * every @interval, before @timeout. Timeout constraints the |
| 2913 | * beginning of the stable state. Because, after hot unplugging, |
| 2914 | * DET gets stuck at 1 on some controllers, this functions waits |
| 2915 | * until timeout then returns 0 if DET is stable at 1. |
| 2916 | * |
| 2917 | * LOCKING: |
| 2918 | * Kernel thread context (may sleep) |
| 2919 | * |
| 2920 | * RETURNS: |
| 2921 | * 0 on success, -errno on failure. |
| 2922 | */ |
| 2923 | int sata_phy_debounce(struct ata_port *ap, const unsigned long *params) |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 2924 | { |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 2925 | unsigned long interval_msec = params[0]; |
| 2926 | unsigned long duration = params[1] * HZ / 1000; |
| 2927 | unsigned long timeout = jiffies + params[2] * HZ / 1000; |
| 2928 | unsigned long last_jiffies; |
| 2929 | u32 last, cur; |
| 2930 | int rc; |
| 2931 | |
| 2932 | if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) |
| 2933 | return rc; |
| 2934 | cur &= 0xf; |
| 2935 | |
| 2936 | last = cur; |
| 2937 | last_jiffies = jiffies; |
| 2938 | |
| 2939 | while (1) { |
| 2940 | msleep(interval_msec); |
| 2941 | if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) |
| 2942 | return rc; |
| 2943 | cur &= 0xf; |
| 2944 | |
| 2945 | /* DET stable? */ |
| 2946 | if (cur == last) { |
| 2947 | if (cur == 1 && time_before(jiffies, timeout)) |
| 2948 | continue; |
| 2949 | if (time_after(jiffies, last_jiffies + duration)) |
| 2950 | return 0; |
| 2951 | continue; |
| 2952 | } |
| 2953 | |
| 2954 | /* unstable, start over */ |
| 2955 | last = cur; |
| 2956 | last_jiffies = jiffies; |
| 2957 | |
| 2958 | /* check timeout */ |
| 2959 | if (time_after(jiffies, timeout)) |
| 2960 | return -EBUSY; |
| 2961 | } |
| 2962 | } |
| 2963 | |
| 2964 | /** |
| 2965 | * sata_phy_resume - resume SATA phy |
| 2966 | * @ap: ATA port to resume SATA phy for |
| 2967 | * @params: timing parameters { interval, duratinon, timeout } in msec |
| 2968 | * |
| 2969 | * Resume SATA phy of @ap and debounce it. |
| 2970 | * |
| 2971 | * LOCKING: |
| 2972 | * Kernel thread context (may sleep) |
| 2973 | * |
| 2974 | * RETURNS: |
| 2975 | * 0 on success, -errno on failure. |
| 2976 | */ |
| 2977 | int sata_phy_resume(struct ata_port *ap, const unsigned long *params) |
| 2978 | { |
| 2979 | u32 scontrol; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2980 | int rc; |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 2981 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2982 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
| 2983 | return rc; |
| 2984 | |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 2985 | scontrol = (scontrol & 0x0f0) | 0x300; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 2986 | |
| 2987 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) |
| 2988 | return rc; |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 2989 | |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 2990 | /* Some PHYs react badly if SStatus is pounded immediately |
| 2991 | * after resuming. Delay 200ms before debouncing. |
| 2992 | */ |
| 2993 | msleep(200); |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 2994 | |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 2995 | return sata_phy_debounce(ap, params); |
Tejun Heo | 7a7921e | 2006-02-02 18:20:00 +0900 | [diff] [blame] | 2996 | } |
| 2997 | |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2998 | static void ata_wait_spinup(struct ata_port *ap) |
| 2999 | { |
| 3000 | struct ata_eh_context *ehc = &ap->eh_context; |
| 3001 | unsigned long end, secs; |
| 3002 | int rc; |
| 3003 | |
| 3004 | /* first, debounce phy if SATA */ |
| 3005 | if (ap->cbl == ATA_CBL_SATA) { |
Tejun Heo | e9c8391 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 3006 | rc = sata_phy_debounce(ap, sata_deb_timing_hotplug); |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3007 | |
| 3008 | /* if debounced successfully and offline, no need to wait */ |
| 3009 | if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap)) |
| 3010 | return; |
| 3011 | } |
| 3012 | |
| 3013 | /* okay, let's give the drive time to spin up */ |
| 3014 | end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000; |
| 3015 | secs = ((end - jiffies) + HZ - 1) / HZ; |
| 3016 | |
| 3017 | if (time_after(jiffies, end)) |
| 3018 | return; |
| 3019 | |
| 3020 | if (secs > 5) |
| 3021 | ata_port_printk(ap, KERN_INFO, "waiting for device to spin up " |
| 3022 | "(%lu secs)\n", secs); |
| 3023 | |
| 3024 | schedule_timeout_uninterruptible(end - jiffies); |
| 3025 | } |
| 3026 | |
| 3027 | /** |
| 3028 | * ata_std_prereset - prepare for reset |
| 3029 | * @ap: ATA port to be reset |
| 3030 | * |
| 3031 | * @ap is about to be reset. Initialize it. |
| 3032 | * |
| 3033 | * LOCKING: |
| 3034 | * Kernel thread context (may sleep) |
| 3035 | * |
| 3036 | * RETURNS: |
| 3037 | * 0 on success, -errno otherwise. |
| 3038 | */ |
| 3039 | int ata_std_prereset(struct ata_port *ap) |
| 3040 | { |
| 3041 | struct ata_eh_context *ehc = &ap->eh_context; |
Tejun Heo | e9c8391 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 3042 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3043 | int rc; |
| 3044 | |
Tejun Heo | 2832430 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 3045 | /* handle link resume & hotplug spinup */ |
| 3046 | if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && |
| 3047 | (ap->flags & ATA_FLAG_HRST_TO_RESUME)) |
| 3048 | ehc->i.action |= ATA_EH_HARDRESET; |
| 3049 | |
| 3050 | if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) && |
| 3051 | (ap->flags & ATA_FLAG_SKIP_D2H_BSY)) |
| 3052 | ata_wait_spinup(ap); |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3053 | |
| 3054 | /* if we're about to do hardreset, nothing more to do */ |
| 3055 | if (ehc->i.action & ATA_EH_HARDRESET) |
| 3056 | return 0; |
| 3057 | |
| 3058 | /* if SATA, resume phy */ |
| 3059 | if (ap->cbl == ATA_CBL_SATA) { |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3060 | rc = sata_phy_resume(ap, timing); |
| 3061 | if (rc && rc != -EOPNOTSUPP) { |
| 3062 | /* phy resume failed */ |
| 3063 | ata_port_printk(ap, KERN_WARNING, "failed to resume " |
| 3064 | "link for reset (errno=%d)\n", rc); |
| 3065 | return rc; |
| 3066 | } |
| 3067 | } |
| 3068 | |
| 3069 | /* Wait for !BSY if the controller can wait for the first D2H |
| 3070 | * Reg FIS and we don't know that no device is attached. |
| 3071 | */ |
| 3072 | if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) |
| 3073 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 3074 | |
| 3075 | return 0; |
| 3076 | } |
| 3077 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3078 | /** |
| 3079 | * ata_std_softreset - reset host port via ATA SRST |
| 3080 | * @ap: port to reset |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3081 | * @classes: resulting classes of attached devices |
| 3082 | * |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 3083 | * Reset host port using ATA SRST. |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3084 | * |
| 3085 | * LOCKING: |
| 3086 | * Kernel thread context (may sleep) |
| 3087 | * |
| 3088 | * RETURNS: |
| 3089 | * 0 on success, -errno otherwise. |
| 3090 | */ |
Tejun Heo | 2bf2cb2 | 2006-04-11 22:16:45 +0900 | [diff] [blame] | 3091 | int ata_std_softreset(struct ata_port *ap, unsigned int *classes) |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3092 | { |
| 3093 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
| 3094 | unsigned int devmask = 0, err_mask; |
| 3095 | u8 err; |
| 3096 | |
| 3097 | DPRINTK("ENTER\n"); |
| 3098 | |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3099 | if (ata_port_offline(ap)) { |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 3100 | classes[0] = ATA_DEV_NONE; |
| 3101 | goto out; |
| 3102 | } |
| 3103 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3104 | /* determine if device 0/1 are present */ |
| 3105 | if (ata_devchk(ap, 0)) |
| 3106 | devmask |= (1 << 0); |
| 3107 | if (slave_possible && ata_devchk(ap, 1)) |
| 3108 | devmask |= (1 << 1); |
| 3109 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3110 | /* select device 0 again */ |
| 3111 | ap->ops->dev_select(ap, 0); |
| 3112 | |
| 3113 | /* issue bus reset */ |
| 3114 | DPRINTK("about to softreset, devmask=%x\n", devmask); |
| 3115 | err_mask = ata_bus_softreset(ap, devmask); |
| 3116 | if (err_mask) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3117 | ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n", |
| 3118 | err_mask); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3119 | return -EIO; |
| 3120 | } |
| 3121 | |
| 3122 | /* determine by signature whether we have ATA or ATAPI devices */ |
| 3123 | classes[0] = ata_dev_try_classify(ap, 0, &err); |
| 3124 | if (slave_possible && err != 0x81) |
| 3125 | classes[1] = ata_dev_try_classify(ap, 1, &err); |
| 3126 | |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 3127 | out: |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3128 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
| 3129 | return 0; |
| 3130 | } |
| 3131 | |
| 3132 | /** |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3133 | * sata_port_hardreset - reset port via SATA phy reset |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3134 | * @ap: port to reset |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3135 | * @timing: timing parameters { interval, duratinon, timeout } in msec |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3136 | * |
| 3137 | * SATA phy-reset host port using DET bits of SControl register. |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3138 | * |
| 3139 | * LOCKING: |
| 3140 | * Kernel thread context (may sleep) |
| 3141 | * |
| 3142 | * RETURNS: |
| 3143 | * 0 on success, -errno otherwise. |
| 3144 | */ |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3145 | int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing) |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3146 | { |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3147 | u32 scontrol; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3148 | int rc; |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3149 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3150 | DPRINTK("ENTER\n"); |
| 3151 | |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 3152 | if (sata_set_spd_needed(ap)) { |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 3153 | /* SATA spec says nothing about how to reconfigure |
| 3154 | * spd. To be on the safe side, turn off phy during |
| 3155 | * reconfiguration. This works for at least ICH7 AHCI |
| 3156 | * and Sil3124. |
| 3157 | */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3158 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3159 | goto out; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3160 | |
Martin Hicks | a34b6fc | 2006-07-05 15:06:13 -0400 | [diff] [blame] | 3161 | scontrol = (scontrol & 0x0f0) | 0x304; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3162 | |
| 3163 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3164 | goto out; |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 3165 | |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 3166 | sata_set_spd(ap); |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 3167 | } |
| 3168 | |
| 3169 | /* issue phy wake/reset */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3170 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3171 | goto out; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3172 | |
Tejun Heo | 852ee16 | 2006-04-01 01:38:18 +0900 | [diff] [blame] | 3173 | scontrol = (scontrol & 0x0f0) | 0x301; |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3174 | |
| 3175 | if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3176 | goto out; |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3177 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 3178 | /* 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] | 3179 | * 10.4.2 says at least 1 ms. |
| 3180 | */ |
| 3181 | msleep(1); |
| 3182 | |
Tejun Heo | 1c3fae4 | 2006-04-02 20:53:28 +0900 | [diff] [blame] | 3183 | /* bring phy back */ |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 3184 | rc = sata_phy_resume(ap, timing); |
| 3185 | out: |
| 3186 | DPRINTK("EXIT, rc=%d\n", rc); |
| 3187 | return rc; |
| 3188 | } |
| 3189 | |
| 3190 | /** |
| 3191 | * sata_std_hardreset - reset host port via SATA phy reset |
| 3192 | * @ap: port to reset |
| 3193 | * @class: resulting class of attached device |
| 3194 | * |
| 3195 | * SATA phy-reset host port using DET bits of SControl register, |
| 3196 | * wait for !BSY and classify the attached device. |
| 3197 | * |
| 3198 | * LOCKING: |
| 3199 | * Kernel thread context (may sleep) |
| 3200 | * |
| 3201 | * RETURNS: |
| 3202 | * 0 on success, -errno otherwise. |
| 3203 | */ |
| 3204 | int sata_std_hardreset(struct ata_port *ap, unsigned int *class) |
| 3205 | { |
| 3206 | const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); |
| 3207 | int rc; |
| 3208 | |
| 3209 | DPRINTK("ENTER\n"); |
| 3210 | |
| 3211 | /* do hardreset */ |
| 3212 | rc = sata_port_hardreset(ap, timing); |
| 3213 | if (rc) { |
| 3214 | ata_port_printk(ap, KERN_ERR, |
| 3215 | "COMRESET failed (errno=%d)\n", rc); |
| 3216 | return rc; |
| 3217 | } |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3218 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3219 | /* TODO: phy layer with polling, timeouts, etc. */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3220 | if (ata_port_offline(ap)) { |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3221 | *class = ATA_DEV_NONE; |
| 3222 | DPRINTK("EXIT, link offline\n"); |
| 3223 | return 0; |
| 3224 | } |
| 3225 | |
Tejun Heo | 34fee22 | 2007-02-02 15:29:27 +0900 | [diff] [blame] | 3226 | /* wait a while before checking status, see SRST for more info */ |
| 3227 | msleep(150); |
| 3228 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3229 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3230 | ata_port_printk(ap, KERN_ERR, |
| 3231 | "COMRESET failed (device not ready)\n"); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3232 | return -EIO; |
| 3233 | } |
| 3234 | |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 3235 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
| 3236 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3237 | *class = ata_dev_try_classify(ap, 0, NULL); |
| 3238 | |
| 3239 | DPRINTK("EXIT, class=%u\n", *class); |
| 3240 | return 0; |
| 3241 | } |
| 3242 | |
| 3243 | /** |
| 3244 | * ata_std_postreset - standard postreset callback |
| 3245 | * @ap: the target ata_port |
| 3246 | * @classes: classes of attached devices |
| 3247 | * |
| 3248 | * This function is invoked after a successful reset. Note that |
| 3249 | * the device might have been reset more than once using |
| 3250 | * different reset methods before postreset is invoked. |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3251 | * |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3252 | * LOCKING: |
| 3253 | * Kernel thread context (may sleep) |
| 3254 | */ |
| 3255 | void ata_std_postreset(struct ata_port *ap, unsigned int *classes) |
| 3256 | { |
Tejun Heo | dc2b351 | 2006-05-15 20:58:00 +0900 | [diff] [blame] | 3257 | u32 serror; |
| 3258 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3259 | DPRINTK("ENTER\n"); |
| 3260 | |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3261 | /* print link status */ |
Tejun Heo | 81952c5 | 2006-05-15 20:57:47 +0900 | [diff] [blame] | 3262 | sata_print_link_status(ap); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3263 | |
Tejun Heo | dc2b351 | 2006-05-15 20:58:00 +0900 | [diff] [blame] | 3264 | /* clear SError */ |
| 3265 | if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) |
| 3266 | sata_scr_write(ap, SCR_ERROR, serror); |
| 3267 | |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 3268 | /* re-enable interrupts */ |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 3269 | if (!ap->ops->error_handler) |
| 3270 | ap->ops->irq_on(ap); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3271 | |
| 3272 | /* is double-select really necessary? */ |
| 3273 | if (classes[0] != ATA_DEV_NONE) |
| 3274 | ap->ops->dev_select(ap, 1); |
| 3275 | if (classes[1] != ATA_DEV_NONE) |
| 3276 | ap->ops->dev_select(ap, 0); |
| 3277 | |
Tejun Heo | 3a39746 | 2006-02-10 23:58:48 +0900 | [diff] [blame] | 3278 | /* bail out if no device is present */ |
| 3279 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { |
| 3280 | DPRINTK("EXIT, no device\n"); |
| 3281 | return; |
| 3282 | } |
| 3283 | |
| 3284 | /* set up device control */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 3285 | if (ap->ioaddr.ctl_addr) |
| 3286 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3287 | |
| 3288 | DPRINTK("EXIT\n"); |
| 3289 | } |
| 3290 | |
Tejun Heo | a62c0fc | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 3291 | /** |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3292 | * ata_dev_same_device - Determine whether new ID matches configured device |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3293 | * @dev: device to compare against |
| 3294 | * @new_class: class of the new device |
| 3295 | * @new_id: IDENTIFY page of the new device |
| 3296 | * |
| 3297 | * Compare @new_class and @new_id against @dev and determine |
| 3298 | * whether @dev is the device indicated by @new_class and |
| 3299 | * @new_id. |
| 3300 | * |
| 3301 | * LOCKING: |
| 3302 | * None. |
| 3303 | * |
| 3304 | * RETURNS: |
| 3305 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. |
| 3306 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3307 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
| 3308 | const u16 *new_id) |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3309 | { |
| 3310 | const u16 *old_id = dev->id; |
Tejun Heo | a0cf733 | 2007-01-02 20:18:49 +0900 | [diff] [blame] | 3311 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
| 3312 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3313 | u64 new_n_sectors; |
| 3314 | |
| 3315 | if (dev->class != new_class) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3316 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
| 3317 | dev->class, new_class); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3318 | return 0; |
| 3319 | } |
| 3320 | |
Tejun Heo | a0cf733 | 2007-01-02 20:18:49 +0900 | [diff] [blame] | 3321 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
| 3322 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); |
| 3323 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); |
| 3324 | 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] | 3325 | new_n_sectors = ata_id_n_sectors(new_id); |
| 3326 | |
| 3327 | if (strcmp(model[0], model[1])) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3328 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
| 3329 | "'%s' != '%s'\n", model[0], model[1]); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3330 | return 0; |
| 3331 | } |
| 3332 | |
| 3333 | if (strcmp(serial[0], serial[1])) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3334 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
| 3335 | "'%s' != '%s'\n", serial[0], serial[1]); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3336 | return 0; |
| 3337 | } |
| 3338 | |
| 3339 | if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3340 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
| 3341 | "%llu != %llu\n", |
| 3342 | (unsigned long long)dev->n_sectors, |
| 3343 | (unsigned long long)new_n_sectors); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3344 | return 0; |
| 3345 | } |
| 3346 | |
| 3347 | return 1; |
| 3348 | } |
| 3349 | |
| 3350 | /** |
| 3351 | * ata_dev_revalidate - Revalidate ATA device |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3352 | * @dev: device to revalidate |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3353 | * @readid_flags: read ID flags |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3354 | * |
| 3355 | * Re-read IDENTIFY page and make sure @dev is still attached to |
| 3356 | * the port. |
| 3357 | * |
| 3358 | * LOCKING: |
| 3359 | * Kernel thread context (may sleep) |
| 3360 | * |
| 3361 | * RETURNS: |
| 3362 | * 0 on success, negative errno otherwise |
| 3363 | */ |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3364 | int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3365 | { |
Tejun Heo | 5eb45c0 | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 3366 | unsigned int class = dev->class; |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3367 | u16 *id = (void *)dev->ap->sector_buf; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3368 | int rc; |
| 3369 | |
Tejun Heo | 5eb45c0 | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 3370 | if (!ata_dev_enabled(dev)) { |
| 3371 | rc = -ENODEV; |
| 3372 | goto fail; |
| 3373 | } |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3374 | |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 3375 | /* read ID data */ |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3376 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3377 | if (rc) |
| 3378 | goto fail; |
| 3379 | |
| 3380 | /* is the device still there? */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3381 | if (!ata_dev_same_device(dev, class, id)) { |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3382 | rc = -ENODEV; |
| 3383 | goto fail; |
| 3384 | } |
| 3385 | |
Tejun Heo | fe635c7 | 2006-05-15 20:57:35 +0900 | [diff] [blame] | 3386 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3387 | |
| 3388 | /* configure device according to the new ID */ |
Tejun Heo | efdaedc | 2006-11-01 18:38:52 +0900 | [diff] [blame] | 3389 | rc = ata_dev_configure(dev); |
Tejun Heo | 5eb45c0 | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 3390 | if (rc == 0) |
| 3391 | return 0; |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3392 | |
| 3393 | fail: |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3394 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
Tejun Heo | 623a312 | 2006-03-05 17:55:58 +0900 | [diff] [blame] | 3395 | return rc; |
| 3396 | } |
| 3397 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3398 | struct ata_blacklist_entry { |
| 3399 | const char *model_num; |
| 3400 | const char *model_rev; |
| 3401 | unsigned long horkage; |
| 3402 | }; |
| 3403 | |
| 3404 | static const struct ata_blacklist_entry ata_device_blacklist [] = { |
| 3405 | /* Devices with DMA related problems under Linux */ |
| 3406 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, |
| 3407 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, |
| 3408 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, |
| 3409 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, |
| 3410 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, |
| 3411 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, |
| 3412 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, |
| 3413 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, |
| 3414 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, |
| 3415 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, |
| 3416 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, |
| 3417 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, |
| 3418 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, |
| 3419 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, |
| 3420 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, |
| 3421 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, |
| 3422 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, |
| 3423 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, |
| 3424 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, |
| 3425 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, |
| 3426 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, |
| 3427 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, |
| 3428 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, |
| 3429 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, |
| 3430 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, |
| 3431 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3432 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
| 3433 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, |
| 3434 | { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, |
| 3435 | |
Albert Lee | 18d6e9d | 2007-04-02 11:34:15 +0800 | [diff] [blame] | 3436 | /* Weird ATAPI devices */ |
Albert Lee | 6f23a31 | 2007-04-02 11:39:25 +0800 | [diff] [blame] | 3437 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 | |
| 3438 | ATA_HORKAGE_DMA_RW_ONLY }, |
Albert Lee | 18d6e9d | 2007-04-02 11:34:15 +0800 | [diff] [blame] | 3439 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3440 | /* Devices we expect to fail diagnostics */ |
| 3441 | |
| 3442 | /* Devices where NCQ should be avoided */ |
| 3443 | /* NCQ is slow */ |
| 3444 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
Tejun Heo | 09125ea | 2007-02-28 15:21:23 +0900 | [diff] [blame] | 3445 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
| 3446 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, |
Paul Rolland | 7acfaf3 | 2007-03-26 21:43:44 -0800 | [diff] [blame] | 3447 | /* NCQ is broken */ |
| 3448 | { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ }, |
Jens Axboe | 9644292 | 2007-03-30 09:27:58 +0200 | [diff] [blame] | 3449 | /* NCQ hard hangs device under heavier load, needs hard power cycle */ |
| 3450 | { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ }, |
Robert Hancock | 36e337d | 2007-04-02 22:05:29 -0600 | [diff] [blame] | 3451 | /* Blacklist entries taken from Silicon Image 3124/3132 |
| 3452 | Windows driver .inf file - also several Linux problem reports */ |
| 3453 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, |
| 3454 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, |
| 3455 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3456 | |
| 3457 | /* Devices with NCQ limits */ |
| 3458 | |
| 3459 | /* End Marker */ |
| 3460 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3461 | }; |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 3462 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3463 | unsigned long ata_device_blacklisted(const struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3464 | { |
Tejun Heo | 8bfa79f | 2007-01-02 20:19:40 +0900 | [diff] [blame] | 3465 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
| 3466 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3467 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
Albert Lee | 3a77827 | 2006-06-22 13:00:25 +0800 | [diff] [blame] | 3468 | |
Tejun Heo | 8bfa79f | 2007-01-02 20:19:40 +0900 | [diff] [blame] | 3469 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
| 3470 | 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] | 3471 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3472 | while (ad->model_num) { |
Tejun Heo | 8bfa79f | 2007-01-02 20:19:40 +0900 | [diff] [blame] | 3473 | if (!strcmp(ad->model_num, model_num)) { |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3474 | if (ad->model_rev == NULL) |
| 3475 | return ad->horkage; |
Tejun Heo | 8bfa79f | 2007-01-02 20:19:40 +0900 | [diff] [blame] | 3476 | if (!strcmp(ad->model_rev, model_rev)) |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3477 | return ad->horkage; |
Alan Cox | f4b15fe | 2006-03-22 15:54:04 +0000 | [diff] [blame] | 3478 | } |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3479 | ad++; |
Alan Cox | f4b15fe | 2006-03-22 15:54:04 +0000 | [diff] [blame] | 3480 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3481 | return 0; |
| 3482 | } |
| 3483 | |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 3484 | static int ata_dma_blacklisted(const struct ata_device *dev) |
| 3485 | { |
| 3486 | /* We don't support polling DMA. |
| 3487 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) |
| 3488 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. |
| 3489 | */ |
| 3490 | if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && |
| 3491 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
| 3492 | return 1; |
| 3493 | return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0; |
| 3494 | } |
| 3495 | |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3496 | /** |
| 3497 | * ata_dev_xfermask - Compute supported xfermask of the given device |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3498 | * @dev: Device to compute xfermask for |
| 3499 | * |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 3500 | * Compute supported xfermask of @dev and store it in |
| 3501 | * dev->*_mask. This function is responsible for applying all |
| 3502 | * known limits including host controller limits, device |
| 3503 | * blacklist, etc... |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3504 | * |
| 3505 | * LOCKING: |
| 3506 | * None. |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3507 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3508 | static void ata_dev_xfermask(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3509 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3510 | struct ata_port *ap = dev->ap; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3511 | struct ata_host *host = ap->host; |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3512 | unsigned long xfer_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3513 | |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 3514 | /* controller modes available */ |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 3515 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
| 3516 | ap->mwdma_mask, ap->udma_mask); |
| 3517 | |
Robert Hancock | 8343f88 | 2007-03-06 02:37:51 -0800 | [diff] [blame] | 3518 | /* drive modes available */ |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 3519 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
| 3520 | dev->mwdma_mask, dev->udma_mask); |
| 3521 | xfer_mask &= ata_id_xfermask(dev->id); |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 3522 | |
Alan Cox | b352e57 | 2006-08-10 18:52:12 +0100 | [diff] [blame] | 3523 | /* |
| 3524 | * CFA Advanced TrueIDE timings are not allowed on a shared |
| 3525 | * cable |
| 3526 | */ |
| 3527 | if (ata_dev_pair(dev)) { |
| 3528 | /* No PIO5 or PIO6 */ |
| 3529 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); |
| 3530 | /* No MWDMA3 or MWDMA 4 */ |
| 3531 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); |
| 3532 | } |
| 3533 | |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 3534 | if (ata_dma_blacklisted(dev)) { |
| 3535 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 3536 | ata_dev_printk(dev, KERN_WARNING, |
| 3537 | "device is on DMA blacklist, disabling DMA\n"); |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 3538 | } |
Tejun Heo | a6d5a51 | 2006-03-06 04:31:57 +0900 | [diff] [blame] | 3539 | |
Petr Vandrovec | 14d66ab | 2007-03-08 10:12:12 +0100 | [diff] [blame] | 3540 | if ((host->flags & ATA_HOST_SIMPLEX) && |
| 3541 | host->simplex_claimed && host->simplex_claimed != ap) { |
Tejun Heo | 37deecb | 2006-08-10 16:59:07 +0900 | [diff] [blame] | 3542 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
| 3543 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " |
| 3544 | "other device, disabling DMA\n"); |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 3545 | } |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 3546 | |
Jeff Garzik | e424675 | 2007-03-09 09:56:46 -0500 | [diff] [blame] | 3547 | if (ap->flags & ATA_FLAG_NO_IORDY) |
| 3548 | xfer_mask &= ata_pio_mask_no_iordy(dev); |
| 3549 | |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 3550 | if (ap->ops->mode_filter) |
Alan Cox | a76b62c | 2007-03-09 09:34:07 -0500 | [diff] [blame] | 3551 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
Alan Cox | 5444a6f | 2006-03-27 18:58:20 +0100 | [diff] [blame] | 3552 | |
Robert Hancock | 8343f88 | 2007-03-06 02:37:51 -0800 | [diff] [blame] | 3553 | /* Apply cable rule here. Don't apply it early because when |
| 3554 | * we handle hot plug the cable type can itself change. |
| 3555 | * Check this last so that we know if the transfer rate was |
| 3556 | * solely limited by the cable. |
| 3557 | * Unknown or 80 wire cables reported host side are checked |
| 3558 | * drive side as well. Cases where we know a 40wire cable |
| 3559 | * is used safely for 80 are not checked here. |
| 3560 | */ |
| 3561 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) |
| 3562 | /* UDMA/44 or higher would be available */ |
| 3563 | if((ap->cbl == ATA_CBL_PATA40) || |
| 3564 | (ata_drive_40wire(dev->id) && |
| 3565 | (ap->cbl == ATA_CBL_PATA_UNK || |
| 3566 | ap->cbl == ATA_CBL_PATA80))) { |
| 3567 | ata_dev_printk(dev, KERN_WARNING, |
| 3568 | "limited to UDMA/33 due to 40-wire cable\n"); |
| 3569 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); |
| 3570 | } |
| 3571 | |
Tejun Heo | 565083e | 2006-04-02 17:54:47 +0900 | [diff] [blame] | 3572 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
| 3573 | &dev->mwdma_mask, &dev->udma_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3574 | } |
| 3575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3576 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3577 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3578 | * @dev: Device to which command will be sent |
| 3579 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 3580 | * Issue SET FEATURES - XFER MODE command to device @dev |
| 3581 | * on port @ap. |
| 3582 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3583 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3584 | * PCI/etc. bus probe sem. |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3585 | * |
| 3586 | * RETURNS: |
| 3587 | * 0 on success, AC_ERR_* mask otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3588 | */ |
| 3589 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3590 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3591 | { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 3592 | struct ata_taskfile tf; |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3593 | unsigned int err_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3594 | |
| 3595 | /* set up set-features taskfile */ |
| 3596 | DPRINTK("set features - xfer mode\n"); |
| 3597 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3598 | ata_tf_init(dev, &tf); |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 3599 | tf.command = ATA_CMD_SET_FEATURES; |
| 3600 | tf.feature = SETFEATURES_XFER; |
| 3601 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 3602 | tf.protocol = ATA_PROT_NODATA; |
| 3603 | tf.nsect = dev->xfer_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3604 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3605 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3606 | |
Tejun Heo | 83206a2 | 2006-03-24 15:25:31 +0900 | [diff] [blame] | 3607 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| 3608 | return err_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3609 | } |
| 3610 | |
| 3611 | /** |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3612 | * ata_dev_init_params - Issue INIT DEV PARAMS command |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3613 | * @dev: Device to which command will be sent |
Randy Dunlap | e2a7f77 | 2006-05-18 10:50:18 -0700 | [diff] [blame] | 3614 | * @heads: Number of heads (taskfile parameter) |
| 3615 | * @sectors: Number of sectors (taskfile parameter) |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3616 | * |
| 3617 | * LOCKING: |
Tejun Heo | 6aff8f1 | 2006-02-15 18:24:09 +0900 | [diff] [blame] | 3618 | * Kernel thread context (may sleep) |
| 3619 | * |
| 3620 | * RETURNS: |
| 3621 | * 0 on success, AC_ERR_* mask otherwise. |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3622 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3623 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
| 3624 | u16 heads, u16 sectors) |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3625 | { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 3626 | struct ata_taskfile tf; |
Tejun Heo | 6aff8f1 | 2006-02-15 18:24:09 +0900 | [diff] [blame] | 3627 | unsigned int err_mask; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3628 | |
| 3629 | /* Number of sectors per track 1-255. Number of heads 1-16 */ |
| 3630 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) |
Albert Lee | 00b6f5e | 2006-03-27 16:39:18 +0800 | [diff] [blame] | 3631 | return AC_ERR_INVALID; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3632 | |
| 3633 | /* set up init dev params taskfile */ |
| 3634 | DPRINTK("init dev params \n"); |
| 3635 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3636 | ata_tf_init(dev, &tf); |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 3637 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
| 3638 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 3639 | tf.protocol = ATA_PROT_NODATA; |
| 3640 | tf.nsect = sectors; |
| 3641 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3642 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 3643 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3644 | |
Tejun Heo | 6aff8f1 | 2006-02-15 18:24:09 +0900 | [diff] [blame] | 3645 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| 3646 | return err_mask; |
Albert Lee | 8bf62ece | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 3647 | } |
| 3648 | |
| 3649 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3650 | * ata_sg_clean - Unmap DMA memory associated with command |
| 3651 | * @qc: Command containing DMA memory to be released |
| 3652 | * |
| 3653 | * Unmap all mapped DMA memory associated with this command. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3654 | * |
| 3655 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3656 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3657 | */ |
Tejun Heo | 70e6ad0 | 2006-11-14 22:47:10 +0900 | [diff] [blame] | 3658 | void ata_sg_clean(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | { |
| 3660 | struct ata_port *ap = qc->ap; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3661 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3662 | int dir = qc->dma_dir; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3663 | void *pad_buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3664 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 3665 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
| 3666 | WARN_ON(sg == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3667 | |
| 3668 | if (qc->flags & ATA_QCFLAG_SINGLE) |
Jeff Garzik | f131883 | 2006-02-20 16:55:56 -0500 | [diff] [blame] | 3669 | WARN_ON(qc->n_elem > 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3670 | |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 3671 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3672 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3673 | /* if we padded the buffer out to 32-bit bound, and data |
| 3674 | * xfer direction is from-device, we must copy from the |
| 3675 | * pad buffer back into the supplied buffer |
| 3676 | */ |
| 3677 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) |
| 3678 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); |
| 3679 | |
| 3680 | if (qc->flags & ATA_QCFLAG_SG) { |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 3681 | if (qc->n_elem) |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 3682 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3683 | /* restore last sg */ |
| 3684 | sg[qc->orig_n_elem - 1].length += qc->pad_len; |
| 3685 | if (pad_buf) { |
| 3686 | struct scatterlist *psg = &qc->pad_sgent; |
| 3687 | void *addr = kmap_atomic(psg->page, KM_IRQ0); |
| 3688 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); |
Mark Lord | dfa1598 | 2005-12-12 23:19:28 -0500 | [diff] [blame] | 3689 | kunmap_atomic(addr, KM_IRQ0); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3690 | } |
| 3691 | } else { |
Tejun Heo | 2e242fa | 2006-02-20 23:48:38 +0900 | [diff] [blame] | 3692 | if (qc->n_elem) |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 3693 | dma_unmap_single(ap->dev, |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 3694 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
| 3695 | dir); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3696 | /* restore sg */ |
| 3697 | sg->length += qc->pad_len; |
| 3698 | if (pad_buf) |
| 3699 | memcpy(qc->buf_virt + sg->length - qc->pad_len, |
| 3700 | pad_buf, qc->pad_len); |
| 3701 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3702 | |
| 3703 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3704 | qc->__sg = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3705 | } |
| 3706 | |
| 3707 | /** |
| 3708 | * ata_fill_sg - Fill PCI IDE PRD table |
| 3709 | * @qc: Metadata associated with taskfile to be transferred |
| 3710 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 3711 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 3712 | * associated with the current disk command. |
| 3713 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3714 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3715 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3716 | * |
| 3717 | */ |
| 3718 | static void ata_fill_sg(struct ata_queued_cmd *qc) |
| 3719 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3720 | struct ata_port *ap = qc->ap; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3721 | struct scatterlist *sg; |
| 3722 | unsigned int idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3723 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 3724 | WARN_ON(qc->__sg == NULL); |
Jeff Garzik | f131883 | 2006-02-20 16:55:56 -0500 | [diff] [blame] | 3725 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3726 | |
| 3727 | idx = 0; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3728 | ata_for_each_sg(sg, qc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3729 | u32 addr, offset; |
| 3730 | u32 sg_len, len; |
| 3731 | |
| 3732 | /* determine if physical DMA addr spans 64K boundary. |
| 3733 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 3734 | * truncate dma_addr_t to u32. |
| 3735 | */ |
| 3736 | addr = (u32) sg_dma_address(sg); |
| 3737 | sg_len = sg_dma_len(sg); |
| 3738 | |
| 3739 | while (sg_len) { |
| 3740 | offset = addr & 0xffff; |
| 3741 | len = sg_len; |
| 3742 | if ((offset + sg_len) > 0x10000) |
| 3743 | len = 0x10000 - offset; |
| 3744 | |
| 3745 | ap->prd[idx].addr = cpu_to_le32(addr); |
| 3746 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); |
| 3747 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); |
| 3748 | |
| 3749 | idx++; |
| 3750 | sg_len -= len; |
| 3751 | addr += len; |
| 3752 | } |
| 3753 | } |
| 3754 | |
| 3755 | if (idx) |
| 3756 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
| 3757 | } |
| 3758 | /** |
| 3759 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported |
| 3760 | * @qc: Metadata associated with taskfile to check |
| 3761 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 3762 | * Allow low-level driver to filter ATA PACKET commands, returning |
| 3763 | * a status indicating whether or not it is OK to use DMA for the |
| 3764 | * supplied PACKET command. |
| 3765 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3766 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3767 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3768 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3769 | * RETURNS: 0 when ATAPI DMA can be used |
| 3770 | * nonzero otherwise |
| 3771 | */ |
| 3772 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) |
| 3773 | { |
| 3774 | struct ata_port *ap = qc->ap; |
| 3775 | int rc = 0; /* Assume ATAPI DMA is OK by default */ |
| 3776 | |
Albert Lee | 6f23a31 | 2007-04-02 11:39:25 +0800 | [diff] [blame] | 3777 | /* some drives can only do ATAPI DMA on read/write */ |
| 3778 | if (unlikely(qc->dev->horkage & ATA_HORKAGE_DMA_RW_ONLY)) { |
| 3779 | struct scsi_cmnd *cmd = qc->scsicmd; |
| 3780 | u8 *scsicmd = cmd->cmnd; |
| 3781 | |
| 3782 | switch (scsicmd[0]) { |
| 3783 | case READ_10: |
| 3784 | case WRITE_10: |
| 3785 | case READ_12: |
| 3786 | case WRITE_12: |
| 3787 | case READ_6: |
| 3788 | case WRITE_6: |
| 3789 | /* atapi dma maybe ok */ |
| 3790 | break; |
| 3791 | default: |
| 3792 | /* turn off atapi dma */ |
| 3793 | return 1; |
| 3794 | } |
| 3795 | } |
| 3796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3797 | if (ap->ops->check_atapi_dma) |
| 3798 | rc = ap->ops->check_atapi_dma(qc); |
| 3799 | |
| 3800 | return rc; |
| 3801 | } |
| 3802 | /** |
| 3803 | * ata_qc_prep - Prepare taskfile for submission |
| 3804 | * @qc: Metadata associated with taskfile to be prepared |
| 3805 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 3806 | * Prepare ATA taskfile for submission. |
| 3807 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3808 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3809 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3810 | */ |
| 3811 | void ata_qc_prep(struct ata_queued_cmd *qc) |
| 3812 | { |
| 3813 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 3814 | return; |
| 3815 | |
| 3816 | ata_fill_sg(qc); |
| 3817 | } |
| 3818 | |
Brian King | e46834c | 2006-03-17 17:04:03 -0600 | [diff] [blame] | 3819 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
| 3820 | |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3821 | /** |
| 3822 | * ata_sg_init_one - Associate command with memory buffer |
| 3823 | * @qc: Command to be associated |
| 3824 | * @buf: Memory buffer |
| 3825 | * @buflen: Length of memory buffer, in bytes. |
| 3826 | * |
| 3827 | * Initialize the data-related elements of queued_cmd @qc |
| 3828 | * to point to a single memory buffer, @buf of byte length @buflen. |
| 3829 | * |
| 3830 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3831 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3832 | */ |
| 3833 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3834 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
| 3835 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3836 | qc->flags |= ATA_QCFLAG_SINGLE; |
| 3837 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3838 | qc->__sg = &qc->sgent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3839 | qc->n_elem = 1; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3840 | qc->orig_n_elem = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3841 | qc->buf_virt = buf; |
Brian King | 233277c | 2006-06-07 11:25:31 -0500 | [diff] [blame] | 3842 | qc->nbytes = buflen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3843 | |
Tejun Heo | 61c0596 | 2006-11-14 22:35:43 +0900 | [diff] [blame] | 3844 | sg_init_one(&qc->sgent, buf, buflen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3845 | } |
| 3846 | |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3847 | /** |
| 3848 | * ata_sg_init - Associate command with scatter-gather table. |
| 3849 | * @qc: Command to be associated |
| 3850 | * @sg: Scatter-gather table. |
| 3851 | * @n_elem: Number of elements in s/g table. |
| 3852 | * |
| 3853 | * Initialize the data-related elements of queued_cmd @qc |
| 3854 | * to point to a scatter-gather table @sg, containing @n_elem |
| 3855 | * elements. |
| 3856 | * |
| 3857 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3858 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3859 | */ |
| 3860 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3861 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
| 3862 | unsigned int n_elem) |
| 3863 | { |
| 3864 | qc->flags |= ATA_QCFLAG_SG; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3865 | qc->__sg = sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3866 | qc->n_elem = n_elem; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3867 | qc->orig_n_elem = n_elem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3868 | } |
| 3869 | |
| 3870 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3871 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
| 3872 | * @qc: Command with memory buffer to be mapped. |
| 3873 | * |
| 3874 | * DMA-map the memory buffer associated with queued_cmd @qc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3875 | * |
| 3876 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3877 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3878 | * |
| 3879 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3880 | * Zero on success, negative on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3881 | */ |
| 3882 | |
| 3883 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) |
| 3884 | { |
| 3885 | struct ata_port *ap = qc->ap; |
| 3886 | int dir = qc->dma_dir; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3887 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3888 | dma_addr_t dma_address; |
Tejun Heo | 2e242fa | 2006-02-20 23:48:38 +0900 | [diff] [blame] | 3889 | int trim_sg = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3890 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3891 | /* we must lengthen transfers to end on a 32-bit boundary */ |
| 3892 | qc->pad_len = sg->length & 3; |
| 3893 | if (qc->pad_len) { |
| 3894 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); |
| 3895 | struct scatterlist *psg = &qc->pad_sgent; |
| 3896 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 3897 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3898 | |
| 3899 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); |
| 3900 | |
| 3901 | if (qc->tf.flags & ATA_TFLAG_WRITE) |
| 3902 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, |
| 3903 | qc->pad_len); |
| 3904 | |
| 3905 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); |
| 3906 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; |
| 3907 | /* trim sg */ |
| 3908 | sg->length -= qc->pad_len; |
Tejun Heo | 2e242fa | 2006-02-20 23:48:38 +0900 | [diff] [blame] | 3909 | if (sg->length == 0) |
| 3910 | trim_sg = 1; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3911 | |
| 3912 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", |
| 3913 | sg->length, qc->pad_len); |
| 3914 | } |
| 3915 | |
Tejun Heo | 2e242fa | 2006-02-20 23:48:38 +0900 | [diff] [blame] | 3916 | if (trim_sg) { |
| 3917 | qc->n_elem--; |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 3918 | goto skip_map; |
| 3919 | } |
| 3920 | |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 3921 | dma_address = dma_map_single(ap->dev, qc->buf_virt, |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 3922 | sg->length, dir); |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 3923 | if (dma_mapping_error(dma_address)) { |
| 3924 | /* restore sg */ |
| 3925 | sg->length += qc->pad_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3926 | return -1; |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 3927 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3928 | |
| 3929 | sg_dma_address(sg) = dma_address; |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 3930 | sg_dma_len(sg) = sg->length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3931 | |
Tejun Heo | 2e242fa | 2006-02-20 23:48:38 +0900 | [diff] [blame] | 3932 | skip_map: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3933 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
| 3934 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 3935 | |
| 3936 | return 0; |
| 3937 | } |
| 3938 | |
| 3939 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3940 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
| 3941 | * @qc: Command with scatter-gather table to be mapped. |
| 3942 | * |
| 3943 | * DMA-map the scatter-gather table associated with queued_cmd @qc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3944 | * |
| 3945 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 3946 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3947 | * |
| 3948 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3949 | * Zero on success, negative on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3950 | * |
| 3951 | */ |
| 3952 | |
| 3953 | static int ata_sg_setup(struct ata_queued_cmd *qc) |
| 3954 | { |
| 3955 | struct ata_port *ap = qc->ap; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3956 | struct scatterlist *sg = qc->__sg; |
| 3957 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 3958 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3959 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 3960 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 3961 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3962 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3963 | /* we must lengthen transfers to end on a 32-bit boundary */ |
| 3964 | qc->pad_len = lsg->length & 3; |
| 3965 | if (qc->pad_len) { |
| 3966 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); |
| 3967 | struct scatterlist *psg = &qc->pad_sgent; |
| 3968 | unsigned int offset; |
| 3969 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 3970 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3971 | |
| 3972 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); |
| 3973 | |
| 3974 | /* |
| 3975 | * psg->page/offset are used to copy to-be-written |
| 3976 | * data in this function or read data in ata_sg_clean. |
| 3977 | */ |
| 3978 | offset = lsg->offset + lsg->length - qc->pad_len; |
| 3979 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); |
| 3980 | psg->offset = offset_in_page(offset); |
| 3981 | |
| 3982 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 3983 | void *addr = kmap_atomic(psg->page, KM_IRQ0); |
| 3984 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); |
Mark Lord | dfa1598 | 2005-12-12 23:19:28 -0500 | [diff] [blame] | 3985 | kunmap_atomic(addr, KM_IRQ0); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3986 | } |
| 3987 | |
| 3988 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); |
| 3989 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; |
| 3990 | /* trim last sg */ |
| 3991 | lsg->length -= qc->pad_len; |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 3992 | if (lsg->length == 0) |
| 3993 | trim_sg = 1; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3994 | |
| 3995 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", |
| 3996 | qc->n_elem - 1, lsg->length, qc->pad_len); |
| 3997 | } |
| 3998 | |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 3999 | pre_n_elem = qc->n_elem; |
| 4000 | if (trim_sg && pre_n_elem) |
| 4001 | pre_n_elem--; |
| 4002 | |
| 4003 | if (!pre_n_elem) { |
| 4004 | n_elem = 0; |
| 4005 | goto skip_map; |
| 4006 | } |
| 4007 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4008 | dir = qc->dma_dir; |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 4009 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 4010 | if (n_elem < 1) { |
| 4011 | /* restore last sg */ |
| 4012 | lsg->length += qc->pad_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4013 | return -1; |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 4014 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4015 | |
| 4016 | DPRINTK("%d sg elements mapped\n", n_elem); |
| 4017 | |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 4018 | skip_map: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4019 | qc->n_elem = n_elem; |
| 4020 | |
| 4021 | return 0; |
| 4022 | } |
| 4023 | |
| 4024 | /** |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 4025 | * swap_buf_le16 - swap halves of 16-bit words in place |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4026 | * @buf: Buffer to swap |
| 4027 | * @buf_words: Number of 16-bit words in buffer. |
| 4028 | * |
| 4029 | * Swap halves of 16-bit words if needed to convert from |
| 4030 | * little-endian byte order to native cpu byte order, or |
| 4031 | * vice-versa. |
| 4032 | * |
| 4033 | * LOCKING: |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 4034 | * Inherited from caller. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4035 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4036 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
| 4037 | { |
| 4038 | #ifdef __BIG_ENDIAN |
| 4039 | unsigned int i; |
| 4040 | |
| 4041 | for (i = 0; i < buf_words; i++) |
| 4042 | buf[i] = le16_to_cpu(buf[i]); |
| 4043 | #endif /* __BIG_ENDIAN */ |
| 4044 | } |
| 4045 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4046 | /** |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4047 | * ata_data_xfer - Transfer data by PIO |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4048 | * @adev: device to target |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4049 | * @buf: data buffer |
| 4050 | * @buflen: buffer length |
Jeff Garzik | 344baba | 2005-09-07 01:15:17 -0400 | [diff] [blame] | 4051 | * @write_data: read/write |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4052 | * |
| 4053 | * Transfer data from/to the device data register by PIO. |
| 4054 | * |
| 4055 | * LOCKING: |
| 4056 | * Inherited from caller. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4057 | */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4058 | void ata_data_xfer(struct ata_device *adev, unsigned char *buf, |
| 4059 | unsigned int buflen, int write_data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4060 | { |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4061 | struct ata_port *ap = adev->ap; |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4062 | unsigned int words = buflen >> 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4063 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4064 | /* Transfer multiple of 2 bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4065 | if (write_data) |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4066 | iowrite16_rep(ap->ioaddr.data_addr, buf, words); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4067 | else |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4068 | ioread16_rep(ap->ioaddr.data_addr, buf, words); |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4069 | |
| 4070 | /* Transfer trailing 1 byte, if any. */ |
| 4071 | if (unlikely(buflen & 0x01)) { |
| 4072 | u16 align_buf[1] = { 0 }; |
| 4073 | unsigned char *trailing_buf = buf + buflen - 1; |
| 4074 | |
| 4075 | if (write_data) { |
| 4076 | memcpy(align_buf, trailing_buf, 1); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4077 | iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4078 | } else { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4079 | align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4080 | memcpy(trailing_buf, align_buf, 1); |
| 4081 | } |
| 4082 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4083 | } |
| 4084 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4085 | /** |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4086 | * ata_data_xfer_noirq - Transfer data by PIO |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 4087 | * @adev: device to target |
| 4088 | * @buf: data buffer |
| 4089 | * @buflen: buffer length |
| 4090 | * @write_data: read/write |
| 4091 | * |
Tejun Heo | 8857455 | 2006-06-25 20:00:35 +0900 | [diff] [blame] | 4092 | * Transfer data from/to the device data register by PIO. Do the |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 4093 | * transfer with interrupts disabled. |
| 4094 | * |
| 4095 | * LOCKING: |
| 4096 | * Inherited from caller. |
| 4097 | */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4098 | void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, |
| 4099 | unsigned int buflen, int write_data) |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 4100 | { |
| 4101 | unsigned long flags; |
| 4102 | local_irq_save(flags); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 4103 | ata_data_xfer(adev, buf, buflen, write_data); |
Alan Cox | 75e9958 | 2006-05-24 14:14:41 +0100 | [diff] [blame] | 4104 | local_irq_restore(flags); |
| 4105 | } |
| 4106 | |
| 4107 | |
| 4108 | /** |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4109 | * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. |
| 4110 | * @qc: Command on going |
| 4111 | * |
| 4112 | * Transfer ATA_SECT_SIZE of data from/to the ATA device. |
| 4113 | * |
| 4114 | * LOCKING: |
| 4115 | * Inherited from caller. |
| 4116 | */ |
| 4117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4118 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
| 4119 | { |
| 4120 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4121 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4122 | struct ata_port *ap = qc->ap; |
| 4123 | struct page *page; |
| 4124 | unsigned int offset; |
| 4125 | unsigned char *buf; |
| 4126 | |
Tejun Heo | 726f078 | 2007-01-03 17:30:39 +0900 | [diff] [blame] | 4127 | if (qc->curbytes == qc->nbytes - ATA_SECT_SIZE) |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 4128 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4129 | |
| 4130 | page = sg[qc->cursg].page; |
Tejun Heo | 726f078 | 2007-01-03 17:30:39 +0900 | [diff] [blame] | 4131 | offset = sg[qc->cursg].offset + qc->cursg_ofs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4132 | |
| 4133 | /* get the current page and offset */ |
| 4134 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 4135 | offset %= PAGE_SIZE; |
| 4136 | |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 4137 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 4138 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4139 | if (PageHighMem(page)) { |
| 4140 | unsigned long flags; |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 4141 | |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4142 | /* FIXME: use a bounce buffer */ |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4143 | local_irq_save(flags); |
| 4144 | buf = kmap_atomic(page, KM_IRQ0); |
Albert Lee | 083958d | 2005-10-09 09:47:31 -0400 | [diff] [blame] | 4145 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4146 | /* do the actual data transfer */ |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4147 | ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write); |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4148 | |
| 4149 | kunmap_atomic(buf, KM_IRQ0); |
| 4150 | local_irq_restore(flags); |
| 4151 | } else { |
| 4152 | buf = page_address(page); |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4153 | ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write); |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4154 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4155 | |
Tejun Heo | 726f078 | 2007-01-03 17:30:39 +0900 | [diff] [blame] | 4156 | qc->curbytes += ATA_SECT_SIZE; |
| 4157 | qc->cursg_ofs += ATA_SECT_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4158 | |
Tejun Heo | 726f078 | 2007-01-03 17:30:39 +0900 | [diff] [blame] | 4159 | if (qc->cursg_ofs == (&sg[qc->cursg])->length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4160 | qc->cursg++; |
| 4161 | qc->cursg_ofs = 0; |
| 4162 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4163 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4164 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4165 | /** |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4166 | * ata_pio_sectors - Transfer one or many 512-byte sectors. |
| 4167 | * @qc: Command on going |
| 4168 | * |
Jeff Garzik | c81e29b | 2006-05-24 01:49:12 -0400 | [diff] [blame] | 4169 | * Transfer one or many ATA_SECT_SIZE of data from/to the |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4170 | * ATA device for the DRQ request. |
| 4171 | * |
| 4172 | * LOCKING: |
| 4173 | * Inherited from caller. |
| 4174 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4175 | |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4176 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
| 4177 | { |
| 4178 | if (is_multi_taskfile(&qc->tf)) { |
| 4179 | /* READ/WRITE MULTIPLE */ |
| 4180 | unsigned int nsect; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4181 | |
Jeff Garzik | 587005d | 2006-02-11 18:17:32 -0500 | [diff] [blame] | 4182 | WARN_ON(qc->dev->multi_count == 0); |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4183 | |
Tejun Heo | 726f078 | 2007-01-03 17:30:39 +0900 | [diff] [blame] | 4184 | nsect = min((qc->nbytes - qc->curbytes) / ATA_SECT_SIZE, |
| 4185 | qc->dev->multi_count); |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4186 | while (nsect--) |
| 4187 | ata_pio_sector(qc); |
| 4188 | } else |
| 4189 | ata_pio_sector(qc); |
| 4190 | } |
| 4191 | |
| 4192 | /** |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 4193 | * atapi_send_cdb - Write CDB bytes to hardware |
| 4194 | * @ap: Port to which ATAPI device is attached. |
| 4195 | * @qc: Taskfile currently active |
| 4196 | * |
| 4197 | * When device has indicated its readiness to accept |
| 4198 | * a CDB, this function is called. Send the CDB. |
| 4199 | * |
| 4200 | * LOCKING: |
| 4201 | * caller. |
| 4202 | */ |
| 4203 | |
| 4204 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) |
| 4205 | { |
| 4206 | /* send SCSI cdb */ |
| 4207 | DPRINTK("send cdb\n"); |
Jeff Garzik | db024d5 | 2006-02-13 00:23:57 -0500 | [diff] [blame] | 4208 | WARN_ON(qc->dev->cdb_len < 12); |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 4209 | |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4210 | 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] | 4211 | ata_altstatus(ap); /* flush */ |
| 4212 | |
| 4213 | switch (qc->tf.protocol) { |
| 4214 | case ATA_PROT_ATAPI: |
| 4215 | ap->hsm_task_state = HSM_ST; |
| 4216 | break; |
| 4217 | case ATA_PROT_ATAPI_NODATA: |
| 4218 | ap->hsm_task_state = HSM_ST_LAST; |
| 4219 | break; |
| 4220 | case ATA_PROT_ATAPI_DMA: |
| 4221 | ap->hsm_task_state = HSM_ST_LAST; |
| 4222 | /* initiate bmdma */ |
| 4223 | ap->ops->bmdma_start(qc); |
| 4224 | break; |
| 4225 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4226 | } |
| 4227 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4228 | /** |
| 4229 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 4230 | * @qc: Command on going |
| 4231 | * @bytes: number of bytes |
| 4232 | * |
| 4233 | * Transfer Transfer data from/to the ATAPI device. |
| 4234 | * |
| 4235 | * LOCKING: |
| 4236 | * Inherited from caller. |
| 4237 | * |
| 4238 | */ |
| 4239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4240 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
| 4241 | { |
| 4242 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4243 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4244 | struct ata_port *ap = qc->ap; |
| 4245 | struct page *page; |
| 4246 | unsigned char *buf; |
| 4247 | unsigned int offset, count; |
| 4248 | |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4249 | if (qc->curbytes + bytes >= qc->nbytes) |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 4250 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4251 | |
| 4252 | next_sg: |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4253 | if (unlikely(qc->cursg >= qc->n_elem)) { |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 4254 | /* |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4255 | * The end of qc->sg is reached and the device expects |
| 4256 | * more data to transfer. In order not to overrun qc->sg |
| 4257 | * and fulfill length specified in the byte count register, |
| 4258 | * - for read case, discard trailing data from the device |
| 4259 | * - for write case, padding zero data to the device |
| 4260 | */ |
| 4261 | u16 pad_buf[1] = { 0 }; |
| 4262 | unsigned int words = bytes >> 1; |
| 4263 | unsigned int i; |
| 4264 | |
| 4265 | if (words) /* warning if bytes > 1 */ |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 4266 | ata_dev_printk(qc->dev, KERN_WARNING, |
| 4267 | "%u bytes trailing data\n", bytes); |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4268 | |
| 4269 | for (i = 0; i < words; i++) |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4270 | 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] | 4271 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 4272 | ap->hsm_task_state = HSM_ST_LAST; |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4273 | return; |
| 4274 | } |
| 4275 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4276 | sg = &qc->__sg[qc->cursg]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4278 | page = sg->page; |
| 4279 | offset = sg->offset + qc->cursg_ofs; |
| 4280 | |
| 4281 | /* get the current page and offset */ |
| 4282 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 4283 | offset %= PAGE_SIZE; |
| 4284 | |
Albert Lee | 6952df0 | 2005-06-06 15:56:03 +0800 | [diff] [blame] | 4285 | /* don't overrun current sg */ |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 4286 | count = min(sg->length - qc->cursg_ofs, bytes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4287 | |
| 4288 | /* don't cross page boundaries */ |
| 4289 | count = min(count, (unsigned int)PAGE_SIZE - offset); |
| 4290 | |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 4291 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 4292 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4293 | if (PageHighMem(page)) { |
| 4294 | unsigned long flags; |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 4295 | |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4296 | /* FIXME: use bounce buffer */ |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4297 | local_irq_save(flags); |
| 4298 | buf = kmap_atomic(page, KM_IRQ0); |
Albert Lee | 083958d | 2005-10-09 09:47:31 -0400 | [diff] [blame] | 4299 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4300 | /* do the actual data transfer */ |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4301 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4302 | |
| 4303 | kunmap_atomic(buf, KM_IRQ0); |
| 4304 | local_irq_restore(flags); |
| 4305 | } else { |
| 4306 | buf = page_address(page); |
Alan Cox | a6b2c5d | 2006-05-22 16:59:59 +0100 | [diff] [blame] | 4307 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 4308 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4309 | |
| 4310 | bytes -= count; |
| 4311 | qc->curbytes += count; |
| 4312 | qc->cursg_ofs += count; |
| 4313 | |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 4314 | if (qc->cursg_ofs == sg->length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4315 | qc->cursg++; |
| 4316 | qc->cursg_ofs = 0; |
| 4317 | } |
| 4318 | |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 4319 | if (bytes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4320 | goto next_sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4321 | } |
| 4322 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4323 | /** |
| 4324 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 4325 | * @qc: Command on going |
| 4326 | * |
| 4327 | * Transfer Transfer data from/to the ATAPI device. |
| 4328 | * |
| 4329 | * LOCKING: |
| 4330 | * Inherited from caller. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 4331 | */ |
| 4332 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4333 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
| 4334 | { |
| 4335 | struct ata_port *ap = qc->ap; |
| 4336 | struct ata_device *dev = qc->dev; |
| 4337 | unsigned int ireason, bc_lo, bc_hi, bytes; |
| 4338 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; |
| 4339 | |
Albert Lee | eec4c3f | 2006-05-18 17:51:10 +0800 | [diff] [blame] | 4340 | /* Abuse qc->result_tf for temp storage of intermediate TF |
| 4341 | * here to save some kernel stack usage. |
| 4342 | * For normal completion, qc->result_tf is not relevant. For |
| 4343 | * error, qc->result_tf is later overwritten by ata_qc_complete(). |
| 4344 | * So, the correctness of qc->result_tf is not affected. |
| 4345 | */ |
| 4346 | ap->ops->tf_read(ap, &qc->result_tf); |
| 4347 | ireason = qc->result_tf.nsect; |
| 4348 | bc_lo = qc->result_tf.lbam; |
| 4349 | bc_hi = qc->result_tf.lbah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4350 | bytes = (bc_hi << 8) | bc_lo; |
| 4351 | |
| 4352 | /* shall be cleared to zero, indicating xfer of data */ |
| 4353 | if (ireason & (1 << 0)) |
| 4354 | goto err_out; |
| 4355 | |
| 4356 | /* make sure transfer direction matches expected */ |
| 4357 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; |
| 4358 | if (do_write != i_write) |
| 4359 | goto err_out; |
| 4360 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 4361 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4363 | __atapi_pio_bytes(qc, bytes); |
| 4364 | |
| 4365 | return; |
| 4366 | |
| 4367 | err_out: |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 4368 | ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); |
Tejun Heo | 11a56d2 | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 4369 | qc->err_mask |= AC_ERR_HSM; |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 4370 | ap->hsm_task_state = HSM_ST_ERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4371 | } |
| 4372 | |
| 4373 | /** |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4374 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
| 4375 | * @ap: the target ata_port |
| 4376 | * @qc: qc on going |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4377 | * |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4378 | * RETURNS: |
| 4379 | * 1 if ok in workqueue, 0 otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4380 | */ |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4381 | |
| 4382 | 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] | 4383 | { |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4384 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 4385 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4386 | |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4387 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
| 4388 | if (qc->tf.protocol == ATA_PROT_PIO && |
| 4389 | (qc->tf.flags & ATA_TFLAG_WRITE)) |
| 4390 | return 1; |
| 4391 | |
| 4392 | if (is_atapi_taskfile(&qc->tf) && |
| 4393 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
| 4394 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4395 | } |
| 4396 | |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4397 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4398 | } |
| 4399 | |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4400 | /** |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4401 | * ata_hsm_qc_complete - finish a qc running on standard HSM |
| 4402 | * @qc: Command to complete |
| 4403 | * @in_wq: 1 if called from workqueue, 0 otherwise |
| 4404 | * |
| 4405 | * Finish @qc which is running on standard HSM. |
| 4406 | * |
| 4407 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4408 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4409 | * Otherwise, none on entry and grabs host lock. |
| 4410 | */ |
| 4411 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) |
| 4412 | { |
| 4413 | struct ata_port *ap = qc->ap; |
| 4414 | unsigned long flags; |
| 4415 | |
| 4416 | if (ap->ops->error_handler) { |
| 4417 | if (in_wq) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4418 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4419 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4420 | /* EH might have kicked in while host lock is |
| 4421 | * released. |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4422 | */ |
| 4423 | qc = ata_qc_from_tag(ap, qc->tag); |
| 4424 | if (qc) { |
| 4425 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 4426 | ap->ops->irq_on(ap); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4427 | ata_qc_complete(qc); |
| 4428 | } else |
| 4429 | ata_port_freeze(ap); |
| 4430 | } |
| 4431 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4432 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4433 | } else { |
| 4434 | if (likely(!(qc->err_mask & AC_ERR_HSM))) |
| 4435 | ata_qc_complete(qc); |
| 4436 | else |
| 4437 | ata_port_freeze(ap); |
| 4438 | } |
| 4439 | } else { |
| 4440 | if (in_wq) { |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4441 | spin_lock_irqsave(ap->lock, flags); |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 4442 | ap->ops->irq_on(ap); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4443 | ata_qc_complete(qc); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4444 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4445 | } else |
| 4446 | ata_qc_complete(qc); |
| 4447 | } |
Jeff Garzik | c81e29b | 2006-05-24 01:49:12 -0400 | [diff] [blame] | 4448 | |
| 4449 | ata_altstatus(ap); /* flush */ |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4450 | } |
| 4451 | |
| 4452 | /** |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4453 | * ata_hsm_move - move the HSM to the next state. |
| 4454 | * @ap: the target ata_port |
| 4455 | * @qc: qc on going |
| 4456 | * @status: current device status |
| 4457 | * @in_wq: 1 if called from workqueue, 0 otherwise |
| 4458 | * |
| 4459 | * RETURNS: |
| 4460 | * 1 when poll next status needed, 0 otherwise. |
| 4461 | */ |
Tejun Heo | 9a1004d | 2006-05-31 18:27:52 +0900 | [diff] [blame] | 4462 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
| 4463 | u8 status, int in_wq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4464 | { |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4465 | unsigned long flags = 0; |
| 4466 | int poll_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4467 | |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 4468 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
Albert Lee | 0565c26 | 2006-02-13 18:55:25 +0800 | [diff] [blame] | 4469 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4470 | /* Make sure ata_qc_issue_prot() does not throw things |
| 4471 | * like DMA polling into the workqueue. Notice that |
| 4472 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). |
Albert Lee | 1c84898 | 2005-12-05 15:40:15 +0800 | [diff] [blame] | 4473 | */ |
Albert Lee | c234fb0 | 2006-03-25 17:58:38 +0800 | [diff] [blame] | 4474 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
Albert Lee | 1c84898 | 2005-12-05 15:40:15 +0800 | [diff] [blame] | 4475 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4476 | fsm_start: |
Albert Lee | 999bb6f | 2006-03-25 18:07:48 +0800 | [diff] [blame] | 4477 | 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] | 4478 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4479 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4480 | switch (ap->hsm_task_state) { |
| 4481 | case HSM_ST_FIRST: |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4482 | /* Send first data block or PACKET CDB */ |
| 4483 | |
| 4484 | /* If polling, we will stay in the work queue after |
| 4485 | * sending the data. Otherwise, interrupt handler |
| 4486 | * takes over after sending the data. |
| 4487 | */ |
| 4488 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); |
| 4489 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4490 | /* check device status */ |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4491 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 4492 | /* handle BSY=0, DRQ=0 as error */ |
| 4493 | if (likely(status & (ATA_ERR | ATA_DF))) |
| 4494 | /* device stops HSM for abort/error */ |
| 4495 | qc->err_mask |= AC_ERR_DEV; |
| 4496 | else |
| 4497 | /* HSM violation. Let EH handle this */ |
| 4498 | qc->err_mask |= AC_ERR_HSM; |
| 4499 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4500 | ap->hsm_task_state = HSM_ST_ERR; |
| 4501 | goto fsm_start; |
| 4502 | } |
| 4503 | |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4504 | /* Device should not ask for data transfer (DRQ=1) |
| 4505 | * when it finds something wrong. |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4506 | * We ignore DRQ here and stop the HSM by |
| 4507 | * changing hsm_task_state to HSM_ST_ERR and |
| 4508 | * let the EH abort the command or reset the device. |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4509 | */ |
| 4510 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 4511 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " |
| 4512 | "error, dev_stat 0x%X\n", status); |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4513 | qc->err_mask |= AC_ERR_HSM; |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4514 | ap->hsm_task_state = HSM_ST_ERR; |
| 4515 | goto fsm_start; |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4516 | } |
| 4517 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4518 | /* Send the CDB (atapi) or the first data block (ata pio out). |
| 4519 | * During the state transition, interrupt handler shouldn't |
| 4520 | * be invoked before the data transfer is complete and |
| 4521 | * hsm_task_state is changed. Hence, the following locking. |
| 4522 | */ |
| 4523 | if (in_wq) |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4524 | spin_lock_irqsave(ap->lock, flags); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4525 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4526 | if (qc->tf.protocol == ATA_PROT_PIO) { |
| 4527 | /* PIO data out protocol. |
| 4528 | * send first data block. |
| 4529 | */ |
| 4530 | |
| 4531 | /* ata_pio_sectors() might change the state |
| 4532 | * to HSM_ST_LAST. so, the state is changed here |
| 4533 | * before ata_pio_sectors(). |
| 4534 | */ |
| 4535 | ap->hsm_task_state = HSM_ST; |
| 4536 | ata_pio_sectors(qc); |
| 4537 | ata_altstatus(ap); /* flush */ |
| 4538 | } else |
| 4539 | /* send CDB */ |
| 4540 | atapi_send_cdb(ap, qc); |
| 4541 | |
| 4542 | if (in_wq) |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 4543 | spin_unlock_irqrestore(ap->lock, flags); |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4544 | |
| 4545 | /* if polling, ata_pio_task() handles the rest. |
| 4546 | * otherwise, interrupt handler takes over from here. |
| 4547 | */ |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4548 | break; |
| 4549 | |
| 4550 | case HSM_ST: |
| 4551 | /* complete command or read/write the data register */ |
| 4552 | if (qc->tf.protocol == ATA_PROT_ATAPI) { |
| 4553 | /* ATAPI PIO protocol */ |
| 4554 | if ((status & ATA_DRQ) == 0) { |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4555 | /* No more data to transfer or device error. |
| 4556 | * Device error will be tagged in HSM_ST_LAST. |
| 4557 | */ |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4558 | ap->hsm_task_state = HSM_ST_LAST; |
| 4559 | goto fsm_start; |
| 4560 | } |
| 4561 | |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4562 | /* Device should not ask for data transfer (DRQ=1) |
| 4563 | * when it finds something wrong. |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4564 | * We ignore DRQ here and stop the HSM by |
| 4565 | * changing hsm_task_state to HSM_ST_ERR and |
| 4566 | * let the EH abort the command or reset the device. |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4567 | */ |
| 4568 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 4569 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " |
| 4570 | "device error, dev_stat 0x%X\n", |
| 4571 | status); |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4572 | qc->err_mask |= AC_ERR_HSM; |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4573 | ap->hsm_task_state = HSM_ST_ERR; |
| 4574 | goto fsm_start; |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4575 | } |
| 4576 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4577 | atapi_pio_bytes(qc); |
| 4578 | |
| 4579 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
| 4580 | /* bad ireason reported by device */ |
| 4581 | goto fsm_start; |
| 4582 | |
| 4583 | } else { |
| 4584 | /* ATA PIO protocol */ |
| 4585 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 4586 | /* handle BSY=0, DRQ=0 as error */ |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4587 | if (likely(status & (ATA_ERR | ATA_DF))) |
| 4588 | /* device stops HSM for abort/error */ |
| 4589 | qc->err_mask |= AC_ERR_DEV; |
| 4590 | else |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 4591 | /* HSM violation. Let EH handle this. |
| 4592 | * Phantom devices also trigger this |
| 4593 | * condition. Mark hint. |
| 4594 | */ |
| 4595 | qc->err_mask |= AC_ERR_HSM | |
| 4596 | AC_ERR_NODEV_HINT; |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4597 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4598 | ap->hsm_task_state = HSM_ST_ERR; |
| 4599 | goto fsm_start; |
| 4600 | } |
| 4601 | |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4602 | /* For PIO reads, some devices may ask for |
| 4603 | * data transfer (DRQ=1) alone with ERR=1. |
| 4604 | * We respect DRQ here and transfer one |
| 4605 | * block of junk data before changing the |
| 4606 | * hsm_task_state to HSM_ST_ERR. |
| 4607 | * |
| 4608 | * For PIO writes, ERR=1 DRQ=1 doesn't make |
| 4609 | * sense since the data block has been |
| 4610 | * transferred to the device. |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4611 | */ |
| 4612 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4613 | /* data might be corrputed */ |
| 4614 | qc->err_mask |= AC_ERR_DEV; |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4615 | |
| 4616 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { |
| 4617 | ata_pio_sectors(qc); |
| 4618 | ata_altstatus(ap); |
| 4619 | status = ata_wait_idle(ap); |
| 4620 | } |
| 4621 | |
Albert Lee | 3655d1d | 2006-05-19 11:43:04 +0800 | [diff] [blame] | 4622 | if (status & (ATA_BUSY | ATA_DRQ)) |
| 4623 | qc->err_mask |= AC_ERR_HSM; |
| 4624 | |
Albert Lee | eee6c32 | 2006-04-01 17:38:43 +0800 | [diff] [blame] | 4625 | /* ata_pio_sectors() might change the |
| 4626 | * state to HSM_ST_LAST. so, the state |
| 4627 | * is changed after ata_pio_sectors(). |
| 4628 | */ |
| 4629 | ap->hsm_task_state = HSM_ST_ERR; |
| 4630 | goto fsm_start; |
Albert Lee | 7160195 | 2006-03-25 18:11:12 +0800 | [diff] [blame] | 4631 | } |
| 4632 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4633 | ata_pio_sectors(qc); |
| 4634 | |
| 4635 | if (ap->hsm_task_state == HSM_ST_LAST && |
| 4636 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { |
| 4637 | /* all data read */ |
| 4638 | ata_altstatus(ap); |
Albert Lee | 52a3220 | 2006-03-25 18:18:15 +0800 | [diff] [blame] | 4639 | status = ata_wait_idle(ap); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4640 | goto fsm_start; |
| 4641 | } |
| 4642 | } |
| 4643 | |
| 4644 | ata_altstatus(ap); /* flush */ |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4645 | poll_next = 1; |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4646 | break; |
| 4647 | |
| 4648 | case HSM_ST_LAST: |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 4649 | if (unlikely(!ata_ok(status))) { |
| 4650 | qc->err_mask |= __ac_err_mask(status); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4651 | ap->hsm_task_state = HSM_ST_ERR; |
| 4652 | goto fsm_start; |
| 4653 | } |
| 4654 | |
| 4655 | /* no more data to transfer */ |
Albert Lee | 4332a77 | 2006-04-03 17:43:24 +0800 | [diff] [blame] | 4656 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 4657 | ap->print_id, qc->dev->devno, status); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4658 | |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 4659 | WARN_ON(qc->err_mask); |
| 4660 | |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4661 | ap->hsm_task_state = HSM_ST_IDLE; |
| 4662 | |
| 4663 | /* complete taskfile transaction */ |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4664 | ata_hsm_qc_complete(qc, in_wq); |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4665 | |
| 4666 | poll_next = 0; |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4667 | break; |
| 4668 | |
| 4669 | case HSM_ST_ERR: |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4670 | /* make sure qc->err_mask is available to |
| 4671 | * know what's wrong and recover |
| 4672 | */ |
| 4673 | WARN_ON(qc->err_mask == 0); |
| 4674 | |
| 4675 | ap->hsm_task_state = HSM_ST_IDLE; |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4676 | |
Albert Lee | 999bb6f | 2006-03-25 18:07:48 +0800 | [diff] [blame] | 4677 | /* complete taskfile transaction */ |
Tejun Heo | c17ea20 | 2006-05-15 20:59:29 +0900 | [diff] [blame] | 4678 | ata_hsm_qc_complete(qc, in_wq); |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4679 | |
| 4680 | poll_next = 0; |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4681 | break; |
| 4682 | default: |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4683 | poll_next = 0; |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 4684 | BUG(); |
Albert Lee | e2cec77 | 2006-03-25 17:43:49 +0800 | [diff] [blame] | 4685 | } |
| 4686 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 4687 | return poll_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4688 | } |
| 4689 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 4690 | static void ata_pio_task(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4691 | { |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 4692 | struct ata_port *ap = |
| 4693 | container_of(work, struct ata_port, port_task.work); |
| 4694 | struct ata_queued_cmd *qc = ap->port_task_data; |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 4695 | u8 status; |
| 4696 | int poll_next; |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 4697 | |
| 4698 | fsm_start: |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 4699 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4700 | |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 4701 | /* |
| 4702 | * This is purely heuristic. This is a fast path. |
| 4703 | * Sometimes when we enter, BSY will be cleared in |
| 4704 | * a chk-status or two. If not, the drive is probably seeking |
| 4705 | * or something. Snooze for a couple msecs, then |
| 4706 | * chk-status again. If still busy, queue delayed work. |
| 4707 | */ |
| 4708 | status = ata_busy_wait(ap, ATA_BUSY, 5); |
| 4709 | if (status & ATA_BUSY) { |
| 4710 | msleep(2); |
| 4711 | status = ata_busy_wait(ap, ATA_BUSY, 10); |
| 4712 | if (status & ATA_BUSY) { |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 4713 | ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 4714 | return; |
| 4715 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4716 | } |
| 4717 | |
Albert Lee | a1af373 | 2006-03-25 17:50:15 +0800 | [diff] [blame] | 4718 | /* move the HSM */ |
| 4719 | poll_next = ata_hsm_move(ap, qc, status, 1); |
| 4720 | |
| 4721 | /* another command or interrupt handler |
| 4722 | * may be running at this point. |
| 4723 | */ |
| 4724 | if (poll_next) |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 4725 | goto fsm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4726 | } |
| 4727 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4728 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4729 | * ata_qc_new - Request an available ATA command, for queueing |
| 4730 | * @ap: Port associated with device @dev |
| 4731 | * @dev: Device from whom we request an available command structure |
| 4732 | * |
| 4733 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4734 | * None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4735 | */ |
| 4736 | |
| 4737 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) |
| 4738 | { |
| 4739 | struct ata_queued_cmd *qc = NULL; |
| 4740 | unsigned int i; |
| 4741 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 4742 | /* no command while frozen */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 4743 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 4744 | return NULL; |
| 4745 | |
Tejun Heo | 2ab7db1 | 2006-05-15 20:58:02 +0900 | [diff] [blame] | 4746 | /* the last tag is reserved for internal command. */ |
| 4747 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) |
Tejun Heo | 6cec4a3 | 2006-05-15 21:03:41 +0900 | [diff] [blame] | 4748 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
Tejun Heo | f69499f | 2006-05-15 20:58:03 +0900 | [diff] [blame] | 4749 | qc = __ata_qc_from_tag(ap, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4750 | break; |
| 4751 | } |
| 4752 | |
| 4753 | if (qc) |
| 4754 | qc->tag = i; |
| 4755 | |
| 4756 | return qc; |
| 4757 | } |
| 4758 | |
| 4759 | /** |
| 4760 | * ata_qc_new_init - Request an available ATA command, and initialize it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4761 | * @dev: Device from whom we request an available command structure |
| 4762 | * |
| 4763 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4764 | * None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4765 | */ |
| 4766 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 4767 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4768 | { |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 4769 | struct ata_port *ap = dev->ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4770 | struct ata_queued_cmd *qc; |
| 4771 | |
| 4772 | qc = ata_qc_new(ap); |
| 4773 | if (qc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4774 | qc->scsicmd = NULL; |
| 4775 | qc->ap = ap; |
| 4776 | qc->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4777 | |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 4778 | ata_qc_reinit(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4779 | } |
| 4780 | |
| 4781 | return qc; |
| 4782 | } |
| 4783 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4784 | /** |
| 4785 | * ata_qc_free - free unused ata_queued_cmd |
| 4786 | * @qc: Command to complete |
| 4787 | * |
| 4788 | * Designed to free unused ata_queued_cmd object |
| 4789 | * in case something prevents using it. |
| 4790 | * |
| 4791 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4792 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4793 | */ |
| 4794 | void ata_qc_free(struct ata_queued_cmd *qc) |
| 4795 | { |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 4796 | struct ata_port *ap = qc->ap; |
| 4797 | unsigned int tag; |
| 4798 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 4799 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4800 | |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 4801 | qc->flags = 0; |
| 4802 | tag = qc->tag; |
| 4803 | if (likely(ata_tag_valid(tag))) { |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 4804 | qc->tag = ATA_TAG_POISON; |
Tejun Heo | 6cec4a3 | 2006-05-15 21:03:41 +0900 | [diff] [blame] | 4805 | clear_bit(tag, &ap->qc_allocated); |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 4806 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4807 | } |
| 4808 | |
Tejun Heo | 7601442 | 2006-02-11 15:13:49 +0900 | [diff] [blame] | 4809 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4810 | { |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 4811 | struct ata_port *ap = qc->ap; |
| 4812 | |
Tejun Heo | a4631474 | 2006-02-11 19:11:13 +0900 | [diff] [blame] | 4813 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
| 4814 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4815 | |
| 4816 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 4817 | ata_sg_clean(qc); |
| 4818 | |
Tejun Heo | 7401abf | 2006-05-15 20:57:32 +0900 | [diff] [blame] | 4819 | /* command should be marked inactive atomically with qc completion */ |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 4820 | if (qc->tf.protocol == ATA_PROT_NCQ) |
| 4821 | ap->sactive &= ~(1 << qc->tag); |
| 4822 | else |
| 4823 | ap->active_tag = ATA_TAG_POISON; |
Tejun Heo | 7401abf | 2006-05-15 20:57:32 +0900 | [diff] [blame] | 4824 | |
Albert Lee | 3f3791d | 2005-08-16 14:25:38 +0800 | [diff] [blame] | 4825 | /* atapi: mark qc as inactive to prevent the interrupt handler |
| 4826 | * from completing the command twice later, before the error handler |
| 4827 | * is called. (when rc != 0 and atapi request sense is needed) |
| 4828 | */ |
| 4829 | qc->flags &= ~ATA_QCFLAG_ACTIVE; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 4830 | ap->qc_active &= ~(1 << qc->tag); |
Albert Lee | 3f3791d | 2005-08-16 14:25:38 +0800 | [diff] [blame] | 4831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4832 | /* call completion callback */ |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 4833 | qc->complete_fn(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4834 | } |
| 4835 | |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 4836 | static void fill_result_tf(struct ata_queued_cmd *qc) |
| 4837 | { |
| 4838 | struct ata_port *ap = qc->ap; |
| 4839 | |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 4840 | qc->result_tf.flags = qc->tf.flags; |
Mark Lord | 4742d54 | 2007-04-02 16:20:35 -0400 | [diff] [blame] | 4841 | ap->ops->tf_read(ap, &qc->result_tf); |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 4842 | } |
| 4843 | |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 4844 | /** |
| 4845 | * ata_qc_complete - Complete an active ATA command |
| 4846 | * @qc: Command to complete |
| 4847 | * @err_mask: ATA Status register contents |
| 4848 | * |
| 4849 | * Indicate to the mid and upper layers that an ATA |
| 4850 | * command has completed, with either an ok or not-ok status. |
| 4851 | * |
| 4852 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4853 | * spin_lock_irqsave(host lock) |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 4854 | */ |
| 4855 | void ata_qc_complete(struct ata_queued_cmd *qc) |
| 4856 | { |
| 4857 | struct ata_port *ap = qc->ap; |
| 4858 | |
| 4859 | /* XXX: New EH and old EH use different mechanisms to |
| 4860 | * synchronize EH with regular execution path. |
| 4861 | * |
| 4862 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. |
| 4863 | * Normal execution path is responsible for not accessing a |
| 4864 | * failed qc. libata core enforces the rule by returning NULL |
| 4865 | * from ata_qc_from_tag() for failed qcs. |
| 4866 | * |
| 4867 | * Old EH depends on ata_qc_complete() nullifying completion |
| 4868 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does |
| 4869 | * not synchronize with interrupt handler. Only PIO task is |
| 4870 | * taken care of. |
| 4871 | */ |
| 4872 | if (ap->ops->error_handler) { |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 4873 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 4874 | |
| 4875 | if (unlikely(qc->err_mask)) |
| 4876 | qc->flags |= ATA_QCFLAG_FAILED; |
| 4877 | |
| 4878 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { |
| 4879 | if (!ata_tag_internal(qc->tag)) { |
| 4880 | /* always fill result TF for failed qc */ |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 4881 | fill_result_tf(qc); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 4882 | ata_qc_schedule_eh(qc); |
| 4883 | return; |
| 4884 | } |
| 4885 | } |
| 4886 | |
| 4887 | /* read result TF if requested */ |
| 4888 | if (qc->flags & ATA_QCFLAG_RESULT_TF) |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 4889 | fill_result_tf(qc); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 4890 | |
| 4891 | __ata_qc_complete(qc); |
| 4892 | } else { |
| 4893 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) |
| 4894 | return; |
| 4895 | |
| 4896 | /* read result TF if failed or requested */ |
| 4897 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) |
Tejun Heo | 39599a5 | 2006-11-14 22:37:35 +0900 | [diff] [blame] | 4898 | fill_result_tf(qc); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 4899 | |
| 4900 | __ata_qc_complete(qc); |
| 4901 | } |
| 4902 | } |
| 4903 | |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 4904 | /** |
| 4905 | * ata_qc_complete_multiple - Complete multiple qcs successfully |
| 4906 | * @ap: port in question |
| 4907 | * @qc_active: new qc_active mask |
| 4908 | * @finish_qc: LLDD callback invoked before completing a qc |
| 4909 | * |
| 4910 | * Complete in-flight commands. This functions is meant to be |
| 4911 | * called from low-level driver's interrupt routine to complete |
| 4912 | * requests normally. ap->qc_active and @qc_active is compared |
| 4913 | * and commands are completed accordingly. |
| 4914 | * |
| 4915 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4916 | * spin_lock_irqsave(host lock) |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 4917 | * |
| 4918 | * RETURNS: |
| 4919 | * Number of completed commands on success, -errno otherwise. |
| 4920 | */ |
| 4921 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, |
| 4922 | void (*finish_qc)(struct ata_queued_cmd *)) |
| 4923 | { |
| 4924 | int nr_done = 0; |
| 4925 | u32 done_mask; |
| 4926 | int i; |
| 4927 | |
| 4928 | done_mask = ap->qc_active ^ qc_active; |
| 4929 | |
| 4930 | if (unlikely(done_mask & qc_active)) { |
| 4931 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " |
| 4932 | "(%08x->%08x)\n", ap->qc_active, qc_active); |
| 4933 | return -EINVAL; |
| 4934 | } |
| 4935 | |
| 4936 | for (i = 0; i < ATA_MAX_QUEUE; i++) { |
| 4937 | struct ata_queued_cmd *qc; |
| 4938 | |
| 4939 | if (!(done_mask & (1 << i))) |
| 4940 | continue; |
| 4941 | |
| 4942 | if ((qc = ata_qc_from_tag(ap, i))) { |
| 4943 | if (finish_qc) |
| 4944 | finish_qc(qc); |
| 4945 | ata_qc_complete(qc); |
| 4946 | nr_done++; |
| 4947 | } |
| 4948 | } |
| 4949 | |
| 4950 | return nr_done; |
| 4951 | } |
| 4952 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4953 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
| 4954 | { |
| 4955 | struct ata_port *ap = qc->ap; |
| 4956 | |
| 4957 | switch (qc->tf.protocol) { |
Tejun Heo | 3dc1d88 | 2006-05-15 21:03:45 +0900 | [diff] [blame] | 4958 | case ATA_PROT_NCQ: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4959 | case ATA_PROT_DMA: |
| 4960 | case ATA_PROT_ATAPI_DMA: |
| 4961 | return 1; |
| 4962 | |
| 4963 | case ATA_PROT_ATAPI: |
| 4964 | case ATA_PROT_PIO: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4965 | if (ap->flags & ATA_FLAG_PIO_DMA) |
| 4966 | return 1; |
| 4967 | |
| 4968 | /* fall through */ |
| 4969 | |
| 4970 | default: |
| 4971 | return 0; |
| 4972 | } |
| 4973 | |
| 4974 | /* never reached */ |
| 4975 | } |
| 4976 | |
| 4977 | /** |
| 4978 | * ata_qc_issue - issue taskfile to device |
| 4979 | * @qc: command to issue to device |
| 4980 | * |
| 4981 | * Prepare an ATA command to submission to device. |
| 4982 | * This includes mapping the data into a DMA-able |
| 4983 | * area, filling in the S/G table, and finally |
| 4984 | * writing the taskfile to hardware, starting the command. |
| 4985 | * |
| 4986 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 4987 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4988 | */ |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 4989 | void ata_qc_issue(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4990 | { |
| 4991 | struct ata_port *ap = qc->ap; |
| 4992 | |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 4993 | /* Make sure only one non-NCQ command is outstanding. The |
| 4994 | * check is skipped for old EH because it reuses active qc to |
| 4995 | * request ATAPI sense. |
| 4996 | */ |
| 4997 | WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); |
| 4998 | |
| 4999 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
| 5000 | WARN_ON(ap->sactive & (1 << qc->tag)); |
| 5001 | ap->sactive |= 1 << qc->tag; |
| 5002 | } else { |
| 5003 | WARN_ON(ap->sactive); |
| 5004 | ap->active_tag = qc->tag; |
| 5005 | } |
| 5006 | |
Tejun Heo | e4a70e7 | 2006-03-31 20:36:47 +0900 | [diff] [blame] | 5007 | qc->flags |= ATA_QCFLAG_ACTIVE; |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 5008 | ap->qc_active |= 1 << qc->tag; |
Tejun Heo | e4a70e7 | 2006-03-31 20:36:47 +0900 | [diff] [blame] | 5009 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5010 | if (ata_should_dma_map(qc)) { |
| 5011 | if (qc->flags & ATA_QCFLAG_SG) { |
| 5012 | if (ata_sg_setup(qc)) |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5013 | goto sg_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5014 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
| 5015 | if (ata_sg_setup_one(qc)) |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5016 | goto sg_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5017 | } |
| 5018 | } else { |
| 5019 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
| 5020 | } |
| 5021 | |
| 5022 | ap->ops->qc_prep(qc); |
| 5023 | |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 5024 | qc->err_mask |= ap->ops->qc_issue(qc); |
| 5025 | if (unlikely(qc->err_mask)) |
| 5026 | goto err; |
| 5027 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5028 | |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5029 | sg_err: |
| 5030 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 5031 | qc->err_mask |= AC_ERR_SYSTEM; |
| 5032 | err: |
| 5033 | ata_qc_complete(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5034 | } |
| 5035 | |
| 5036 | /** |
| 5037 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner |
| 5038 | * @qc: command to issue to device |
| 5039 | * |
| 5040 | * Using various libata functions and hooks, this function |
| 5041 | * starts an ATA command. ATA commands are grouped into |
| 5042 | * classes called "protocols", and issuing each type of protocol |
| 5043 | * is slightly different. |
| 5044 | * |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 5045 | * May be used as the qc_issue() entry in ata_port_operations. |
| 5046 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5047 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5048 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5049 | * |
| 5050 | * RETURNS: |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5051 | * Zero on success, AC_ERR_* mask on failure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5052 | */ |
| 5053 | |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5054 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5055 | { |
| 5056 | struct ata_port *ap = qc->ap; |
| 5057 | |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 5058 | /* Use polling pio if the LLD doesn't handle |
| 5059 | * interrupt driven pio and atapi CDB interrupt. |
| 5060 | */ |
| 5061 | if (ap->flags & ATA_FLAG_PIO_POLLING) { |
| 5062 | switch (qc->tf.protocol) { |
| 5063 | case ATA_PROT_PIO: |
Albert Lee | e3472cb | 2006-12-07 11:37:58 +0800 | [diff] [blame] | 5064 | case ATA_PROT_NODATA: |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 5065 | case ATA_PROT_ATAPI: |
| 5066 | case ATA_PROT_ATAPI_NODATA: |
| 5067 | qc->tf.flags |= ATA_TFLAG_POLLING; |
| 5068 | break; |
| 5069 | case ATA_PROT_ATAPI_DMA: |
| 5070 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) |
Albert Lee | 3a77827 | 2006-06-22 13:00:25 +0800 | [diff] [blame] | 5071 | /* see ata_dma_blacklisted() */ |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 5072 | BUG(); |
| 5073 | break; |
| 5074 | default: |
| 5075 | break; |
| 5076 | } |
| 5077 | } |
| 5078 | |
Tejun Heo | 3d3cca3 | 2006-11-16 10:50:50 +0900 | [diff] [blame] | 5079 | /* Some controllers show flaky interrupt behavior after |
| 5080 | * setting xfer mode. Use polling instead. |
| 5081 | */ |
| 5082 | if (unlikely(qc->tf.command == ATA_CMD_SET_FEATURES && |
| 5083 | qc->tf.feature == SETFEATURES_XFER) && |
| 5084 | (ap->flags & ATA_FLAG_SETXFER_POLLING)) |
| 5085 | qc->tf.flags |= ATA_TFLAG_POLLING; |
| 5086 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5087 | /* select the device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5088 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
| 5089 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5090 | /* start the command */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5091 | switch (qc->tf.protocol) { |
| 5092 | case ATA_PROT_NODATA: |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5093 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 5094 | ata_qc_set_polling(qc); |
| 5095 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 5096 | ata_tf_to_host(ap, &qc->tf); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5097 | ap->hsm_task_state = HSM_ST_LAST; |
| 5098 | |
| 5099 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5100 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5102 | break; |
| 5103 | |
| 5104 | case ATA_PROT_DMA: |
Jeff Garzik | 587005d | 2006-02-11 18:17:32 -0500 | [diff] [blame] | 5105 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5107 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 5108 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 5109 | ap->ops->bmdma_start(qc); /* initiate bmdma */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5110 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5111 | break; |
| 5112 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5113 | case ATA_PROT_PIO: |
| 5114 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 5115 | ata_qc_set_polling(qc); |
| 5116 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 5117 | ata_tf_to_host(ap, &qc->tf); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5118 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5119 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 5120 | /* PIO data out protocol */ |
| 5121 | ap->hsm_task_state = HSM_ST_FIRST; |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5122 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5123 | |
| 5124 | /* always send first data block using |
Albert Lee | e27486d | 2005-11-01 19:24:49 +0800 | [diff] [blame] | 5125 | * the ata_pio_task() codepath. |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5126 | */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5127 | } else { |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5128 | /* PIO data in protocol */ |
| 5129 | ap->hsm_task_state = HSM_ST; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5130 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5131 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5132 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5133 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 5134 | /* if polling, ata_pio_task() handles the rest. |
| 5135 | * otherwise, interrupt handler takes over from here. |
| 5136 | */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5137 | } |
| 5138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5139 | break; |
| 5140 | |
| 5141 | case ATA_PROT_ATAPI: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5142 | case ATA_PROT_ATAPI_NODATA: |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5143 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 5144 | ata_qc_set_polling(qc); |
| 5145 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 5146 | ata_tf_to_host(ap, &qc->tf); |
Jeff Garzik | f6ef65e | 2006-01-27 02:45:00 -0500 | [diff] [blame] | 5147 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5148 | ap->hsm_task_state = HSM_ST_FIRST; |
| 5149 | |
| 5150 | /* send cdb by polling if no cdb interrupt */ |
| 5151 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || |
| 5152 | (qc->tf.flags & ATA_TFLAG_POLLING)) |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5153 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5154 | break; |
| 5155 | |
| 5156 | case ATA_PROT_ATAPI_DMA: |
Jeff Garzik | 587005d | 2006-02-11 18:17:32 -0500 | [diff] [blame] | 5157 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5159 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 5160 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5161 | ap->hsm_task_state = HSM_ST_FIRST; |
| 5162 | |
| 5163 | /* send cdb by polling if no cdb interrupt */ |
| 5164 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Albert Lee | 31ce6da | 2006-04-03 18:31:44 +0800 | [diff] [blame] | 5165 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5166 | break; |
| 5167 | |
| 5168 | default: |
| 5169 | WARN_ON(1); |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 5170 | return AC_ERR_SYSTEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5171 | } |
| 5172 | |
| 5173 | return 0; |
| 5174 | } |
| 5175 | |
| 5176 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5177 | * ata_host_intr - Handle host interrupt for given (port, task) |
| 5178 | * @ap: Port on which interrupt arrived (possibly...) |
| 5179 | * @qc: Taskfile currently active in engine |
| 5180 | * |
| 5181 | * Handle host interrupt for given queued command. Currently, |
| 5182 | * only DMA interrupts are handled. All other commands are |
| 5183 | * handled via polling with interrupts disabled (nIEN bit). |
| 5184 | * |
| 5185 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5186 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5187 | * |
| 5188 | * RETURNS: |
| 5189 | * One if interrupt was handled, zero if not (shared irq). |
| 5190 | */ |
| 5191 | |
| 5192 | inline unsigned int ata_host_intr (struct ata_port *ap, |
| 5193 | struct ata_queued_cmd *qc) |
| 5194 | { |
Tejun Heo | ea54763 | 2006-11-17 12:06:21 +0900 | [diff] [blame] | 5195 | struct ata_eh_info *ehi = &ap->eh_info; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5196 | u8 status, host_stat = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5197 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5198 | VPRINTK("ata%u: protocol %d task_state %d\n", |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5199 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5200 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5201 | /* Check whether we are expecting interrupt in this state */ |
| 5202 | switch (ap->hsm_task_state) { |
| 5203 | case HSM_ST_FIRST: |
Albert Lee | 6912ccd | 2006-03-25 17:45:49 +0800 | [diff] [blame] | 5204 | /* Some pre-ATAPI-4 devices assert INTRQ |
| 5205 | * at this state when ready to receive CDB. |
| 5206 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5207 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5208 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
| 5209 | * The flag was turned on only for atapi devices. |
| 5210 | * No need to check is_atapi_taskfile(&qc->tf) again. |
| 5211 | */ |
| 5212 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5213 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5214 | break; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5215 | case HSM_ST_LAST: |
| 5216 | if (qc->tf.protocol == ATA_PROT_DMA || |
| 5217 | qc->tf.protocol == ATA_PROT_ATAPI_DMA) { |
| 5218 | /* check status of DMA engine */ |
| 5219 | host_stat = ap->ops->bmdma_status(ap); |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5220 | VPRINTK("ata%u: host_stat 0x%X\n", |
| 5221 | ap->print_id, host_stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5222 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5223 | /* if it's not our irq... */ |
| 5224 | if (!(host_stat & ATA_DMA_INTR)) |
| 5225 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5226 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5227 | /* before we do anything else, clear DMA-Start bit */ |
| 5228 | ap->ops->bmdma_stop(qc); |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 5229 | |
| 5230 | if (unlikely(host_stat & ATA_DMA_ERR)) { |
| 5231 | /* error when transfering data to/from memory */ |
| 5232 | qc->err_mask |= AC_ERR_HOST_BUS; |
| 5233 | ap->hsm_task_state = HSM_ST_ERR; |
| 5234 | } |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5235 | } |
| 5236 | break; |
| 5237 | case HSM_ST: |
| 5238 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5239 | default: |
| 5240 | goto idle_irq; |
| 5241 | } |
| 5242 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5243 | /* check altstatus */ |
| 5244 | status = ata_altstatus(ap); |
| 5245 | if (status & ATA_BUSY) |
| 5246 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5247 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5248 | /* check main status, clearing INTRQ */ |
| 5249 | status = ata_chk_status(ap); |
| 5250 | if (unlikely(status & ATA_BUSY)) |
| 5251 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5252 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5253 | /* ack bmdma irq events */ |
| 5254 | ap->ops->irq_clear(ap); |
| 5255 | |
Albert Lee | bb5cb29 | 2006-03-25 17:48:02 +0800 | [diff] [blame] | 5256 | ata_hsm_move(ap, qc, status, 0); |
Tejun Heo | ea54763 | 2006-11-17 12:06:21 +0900 | [diff] [blame] | 5257 | |
| 5258 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || |
| 5259 | qc->tf.protocol == ATA_PROT_ATAPI_DMA)) |
| 5260 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); |
| 5261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5262 | return 1; /* irq handled */ |
| 5263 | |
| 5264 | idle_irq: |
| 5265 | ap->stats.idle_irq++; |
| 5266 | |
| 5267 | #ifdef ATA_IRQ_TRAP |
| 5268 | if ((ap->stats.idle_irq % 1000) == 0) { |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 5269 | ap->ops->irq_ack(ap, 0); /* debug trap */ |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 5270 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
Alan Cox | 23cfce8 | 2006-03-21 16:06:53 +0000 | [diff] [blame] | 5271 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5272 | } |
| 5273 | #endif |
| 5274 | return 0; /* irq not handled */ |
| 5275 | } |
| 5276 | |
| 5277 | /** |
| 5278 | * ata_interrupt - Default ATA host interrupt handler |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5279 | * @irq: irq line (unused) |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5280 | * @dev_instance: pointer to our ata_host information structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5281 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5282 | * Default interrupt handler for PCI IDE devices. Calls |
| 5283 | * ata_host_intr() for each port that is not disabled. |
| 5284 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5285 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5286 | * Obtains host lock during operation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5287 | * |
| 5288 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5289 | * IRQ_NONE or IRQ_HANDLED. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5290 | */ |
| 5291 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 5292 | irqreturn_t ata_interrupt (int irq, void *dev_instance) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5293 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5294 | struct ata_host *host = dev_instance; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5295 | unsigned int i; |
| 5296 | unsigned int handled = 0; |
| 5297 | unsigned long flags; |
| 5298 | |
| 5299 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5300 | spin_lock_irqsave(&host->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5301 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5302 | for (i = 0; i < host->n_ports; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5303 | struct ata_port *ap; |
| 5304 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5305 | ap = host->ports[i]; |
Tejun Heo | c138950 | 2005-08-22 14:59:24 +0900 | [diff] [blame] | 5306 | if (ap && |
Jeff Garzik | 029f546 | 2006-04-02 10:30:40 -0400 | [diff] [blame] | 5307 | !(ap->flags & ATA_FLAG_DISABLED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5308 | struct ata_queued_cmd *qc; |
| 5309 | |
| 5310 | qc = ata_qc_from_tag(ap, ap->active_tag); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 5311 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
Albert Lee | 21b1ed7 | 2005-04-29 17:34:59 +0800 | [diff] [blame] | 5312 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5313 | handled |= ata_host_intr(ap, qc); |
| 5314 | } |
| 5315 | } |
| 5316 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5317 | spin_unlock_irqrestore(&host->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5318 | |
| 5319 | return IRQ_RETVAL(handled); |
| 5320 | } |
| 5321 | |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 5322 | /** |
| 5323 | * sata_scr_valid - test whether SCRs are accessible |
| 5324 | * @ap: ATA port to test SCR accessibility for |
| 5325 | * |
| 5326 | * Test whether SCRs are accessible for @ap. |
| 5327 | * |
| 5328 | * LOCKING: |
| 5329 | * None. |
| 5330 | * |
| 5331 | * RETURNS: |
| 5332 | * 1 if SCRs are accessible, 0 otherwise. |
| 5333 | */ |
| 5334 | int sata_scr_valid(struct ata_port *ap) |
| 5335 | { |
| 5336 | return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read; |
| 5337 | } |
| 5338 | |
| 5339 | /** |
| 5340 | * sata_scr_read - read SCR register of the specified port |
| 5341 | * @ap: ATA port to read SCR for |
| 5342 | * @reg: SCR to read |
| 5343 | * @val: Place to store read value |
| 5344 | * |
| 5345 | * Read SCR register @reg of @ap into *@val. This function is |
| 5346 | * guaranteed to succeed if the cable type of the port is SATA |
| 5347 | * and the port implements ->scr_read. |
| 5348 | * |
| 5349 | * LOCKING: |
| 5350 | * None. |
| 5351 | * |
| 5352 | * RETURNS: |
| 5353 | * 0 on success, negative errno on failure. |
| 5354 | */ |
| 5355 | int sata_scr_read(struct ata_port *ap, int reg, u32 *val) |
| 5356 | { |
| 5357 | if (sata_scr_valid(ap)) { |
| 5358 | *val = ap->ops->scr_read(ap, reg); |
| 5359 | return 0; |
| 5360 | } |
| 5361 | return -EOPNOTSUPP; |
| 5362 | } |
| 5363 | |
| 5364 | /** |
| 5365 | * sata_scr_write - write SCR register of the specified port |
| 5366 | * @ap: ATA port to write SCR for |
| 5367 | * @reg: SCR to write |
| 5368 | * @val: value to write |
| 5369 | * |
| 5370 | * Write @val to SCR register @reg of @ap. This function is |
| 5371 | * guaranteed to succeed if the cable type of the port is SATA |
| 5372 | * and the port implements ->scr_read. |
| 5373 | * |
| 5374 | * LOCKING: |
| 5375 | * None. |
| 5376 | * |
| 5377 | * RETURNS: |
| 5378 | * 0 on success, negative errno on failure. |
| 5379 | */ |
| 5380 | int sata_scr_write(struct ata_port *ap, int reg, u32 val) |
| 5381 | { |
| 5382 | if (sata_scr_valid(ap)) { |
| 5383 | ap->ops->scr_write(ap, reg, val); |
| 5384 | return 0; |
| 5385 | } |
| 5386 | return -EOPNOTSUPP; |
| 5387 | } |
| 5388 | |
| 5389 | /** |
| 5390 | * sata_scr_write_flush - write SCR register of the specified port and flush |
| 5391 | * @ap: ATA port to write SCR for |
| 5392 | * @reg: SCR to write |
| 5393 | * @val: value to write |
| 5394 | * |
| 5395 | * This function is identical to sata_scr_write() except that this |
| 5396 | * function performs flush after writing to the register. |
| 5397 | * |
| 5398 | * LOCKING: |
| 5399 | * None. |
| 5400 | * |
| 5401 | * RETURNS: |
| 5402 | * 0 on success, negative errno on failure. |
| 5403 | */ |
| 5404 | int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) |
| 5405 | { |
| 5406 | if (sata_scr_valid(ap)) { |
| 5407 | ap->ops->scr_write(ap, reg, val); |
| 5408 | ap->ops->scr_read(ap, reg); |
| 5409 | return 0; |
| 5410 | } |
| 5411 | return -EOPNOTSUPP; |
| 5412 | } |
| 5413 | |
| 5414 | /** |
| 5415 | * ata_port_online - test whether the given port is online |
| 5416 | * @ap: ATA port to test |
| 5417 | * |
| 5418 | * Test whether @ap is online. Note that this function returns 0 |
| 5419 | * if online status of @ap cannot be obtained, so |
| 5420 | * ata_port_online(ap) != !ata_port_offline(ap). |
| 5421 | * |
| 5422 | * LOCKING: |
| 5423 | * None. |
| 5424 | * |
| 5425 | * RETURNS: |
| 5426 | * 1 if the port online status is available and online. |
| 5427 | */ |
| 5428 | int ata_port_online(struct ata_port *ap) |
| 5429 | { |
| 5430 | u32 sstatus; |
| 5431 | |
| 5432 | if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) |
| 5433 | return 1; |
| 5434 | return 0; |
| 5435 | } |
| 5436 | |
| 5437 | /** |
| 5438 | * ata_port_offline - test whether the given port is offline |
| 5439 | * @ap: ATA port to test |
| 5440 | * |
| 5441 | * Test whether @ap is offline. Note that this function returns |
| 5442 | * 0 if offline status of @ap cannot be obtained, so |
| 5443 | * ata_port_online(ap) != !ata_port_offline(ap). |
| 5444 | * |
| 5445 | * LOCKING: |
| 5446 | * None. |
| 5447 | * |
| 5448 | * RETURNS: |
| 5449 | * 1 if the port offline status is available and offline. |
| 5450 | */ |
| 5451 | int ata_port_offline(struct ata_port *ap) |
| 5452 | { |
| 5453 | u32 sstatus; |
| 5454 | |
| 5455 | if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) |
| 5456 | return 1; |
| 5457 | return 0; |
| 5458 | } |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 5459 | |
Tejun Heo | 77b08fb | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 5460 | int ata_flush_cache(struct ata_device *dev) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5461 | { |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 5462 | unsigned int err_mask; |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5463 | u8 cmd; |
| 5464 | |
| 5465 | if (!ata_try_flush_cache(dev)) |
| 5466 | return 0; |
| 5467 | |
Tejun Heo | 6fc49ad | 2006-11-11 20:10:45 +0900 | [diff] [blame] | 5468 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5469 | cmd = ATA_CMD_FLUSH_EXT; |
| 5470 | else |
| 5471 | cmd = ATA_CMD_FLUSH; |
| 5472 | |
Tejun Heo | 977e6b9 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 5473 | err_mask = ata_do_simple_cmd(dev, cmd); |
| 5474 | if (err_mask) { |
| 5475 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); |
| 5476 | return -EIO; |
| 5477 | } |
| 5478 | |
| 5479 | return 0; |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5480 | } |
| 5481 | |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 5482 | #ifdef CONFIG_PM |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5483 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
| 5484 | unsigned int action, unsigned int ehi_flags, |
| 5485 | int wait) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5486 | { |
| 5487 | unsigned long flags; |
| 5488 | int i, rc; |
| 5489 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5490 | for (i = 0; i < host->n_ports; i++) { |
| 5491 | struct ata_port *ap = host->ports[i]; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5492 | |
| 5493 | /* Previous resume operation might still be in |
| 5494 | * progress. Wait for PM_PENDING to clear. |
| 5495 | */ |
| 5496 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { |
| 5497 | ata_port_wait_eh(ap); |
| 5498 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); |
| 5499 | } |
| 5500 | |
| 5501 | /* request PM ops to EH */ |
| 5502 | spin_lock_irqsave(ap->lock, flags); |
| 5503 | |
| 5504 | ap->pm_mesg = mesg; |
| 5505 | if (wait) { |
| 5506 | rc = 0; |
| 5507 | ap->pm_result = &rc; |
| 5508 | } |
| 5509 | |
| 5510 | ap->pflags |= ATA_PFLAG_PM_PENDING; |
| 5511 | ap->eh_info.action |= action; |
| 5512 | ap->eh_info.flags |= ehi_flags; |
| 5513 | |
| 5514 | ata_port_schedule_eh(ap); |
| 5515 | |
| 5516 | spin_unlock_irqrestore(ap->lock, flags); |
| 5517 | |
| 5518 | /* wait and check result */ |
| 5519 | if (wait) { |
| 5520 | ata_port_wait_eh(ap); |
| 5521 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); |
| 5522 | if (rc) |
| 5523 | return rc; |
| 5524 | } |
| 5525 | } |
| 5526 | |
| 5527 | return 0; |
| 5528 | } |
| 5529 | |
| 5530 | /** |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5531 | * ata_host_suspend - suspend host |
| 5532 | * @host: host to suspend |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5533 | * @mesg: PM message |
| 5534 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5535 | * Suspend @host. Actual operation is performed by EH. This |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5536 | * function requests EH to perform PM operations and waits for EH |
| 5537 | * to finish. |
| 5538 | * |
| 5539 | * LOCKING: |
| 5540 | * Kernel thread context (may sleep). |
| 5541 | * |
| 5542 | * RETURNS: |
| 5543 | * 0 on success, -errno on failure. |
| 5544 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5545 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5546 | { |
| 5547 | int i, j, rc; |
| 5548 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5549 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5550 | if (rc) |
| 5551 | goto fail; |
| 5552 | |
| 5553 | /* EH is quiescent now. Fail if we have any ready device. |
| 5554 | * This happens if hotplug occurs between completion of device |
| 5555 | * suspension and here. |
| 5556 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5557 | for (i = 0; i < host->n_ports; i++) { |
| 5558 | struct ata_port *ap = host->ports[i]; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5559 | |
| 5560 | for (j = 0; j < ATA_MAX_DEVICES; j++) { |
| 5561 | struct ata_device *dev = &ap->device[j]; |
| 5562 | |
| 5563 | if (ata_dev_ready(dev)) { |
| 5564 | ata_port_printk(ap, KERN_WARNING, |
| 5565 | "suspend failed, device %d " |
| 5566 | "still active\n", dev->devno); |
| 5567 | rc = -EBUSY; |
| 5568 | goto fail; |
| 5569 | } |
| 5570 | } |
| 5571 | } |
| 5572 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5573 | host->dev->power.power_state = mesg; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5574 | return 0; |
| 5575 | |
| 5576 | fail: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5577 | ata_host_resume(host); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5578 | return rc; |
| 5579 | } |
| 5580 | |
| 5581 | /** |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5582 | * ata_host_resume - resume host |
| 5583 | * @host: host to resume |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5584 | * |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5585 | * Resume @host. Actual operation is performed by EH. This |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5586 | * function requests EH to perform PM operations and returns. |
| 5587 | * Note that all resume operations are performed parallely. |
| 5588 | * |
| 5589 | * LOCKING: |
| 5590 | * Kernel thread context (may sleep). |
| 5591 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5592 | void ata_host_resume(struct ata_host *host) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5593 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5594 | ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, |
| 5595 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); |
| 5596 | host->dev->power.power_state = PMSG_ON; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5597 | } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 5598 | #endif |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 5599 | |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 5600 | /** |
| 5601 | * ata_port_start - Set port up for dma. |
| 5602 | * @ap: Port to initialize |
| 5603 | * |
| 5604 | * Called just after data structures for each port are |
| 5605 | * initialized. Allocates space for PRD table. |
| 5606 | * |
| 5607 | * May be used as the port_start() entry in ata_port_operations. |
| 5608 | * |
| 5609 | * LOCKING: |
| 5610 | * Inherited from caller. |
| 5611 | */ |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5612 | int ata_port_start(struct ata_port *ap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5613 | { |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 5614 | struct device *dev = ap->dev; |
Jeff Garzik | 6037d6b | 2005-11-04 22:08:00 -0500 | [diff] [blame] | 5615 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5616 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5617 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
| 5618 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5619 | if (!ap->prd) |
| 5620 | return -ENOMEM; |
| 5621 | |
Jeff Garzik | 6037d6b | 2005-11-04 22:08:00 -0500 | [diff] [blame] | 5622 | rc = ata_pad_alloc(ap, dev); |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5623 | if (rc) |
Jeff Garzik | 6037d6b | 2005-11-04 22:08:00 -0500 | [diff] [blame] | 5624 | return rc; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 5625 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5626 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, |
| 5627 | (unsigned long long)ap->prd_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5628 | return 0; |
| 5629 | } |
| 5630 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 5631 | /** |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 5632 | * ata_dev_init - Initialize an ata_device structure |
| 5633 | * @dev: Device structure to initialize |
| 5634 | * |
| 5635 | * Initialize @dev in preparation for probing. |
| 5636 | * |
| 5637 | * LOCKING: |
| 5638 | * Inherited from caller. |
| 5639 | */ |
| 5640 | void ata_dev_init(struct ata_device *dev) |
| 5641 | { |
| 5642 | struct ata_port *ap = dev->ap; |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 5643 | unsigned long flags; |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 5644 | |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 5645 | /* SATA spd limit is bound to the first device */ |
| 5646 | ap->sata_spd_limit = ap->hw_sata_spd_limit; |
| 5647 | |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 5648 | /* High bits of dev->flags are used to record warm plug |
| 5649 | * requests which occur asynchronously. Synchronize using |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5650 | * host lock. |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 5651 | */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 5652 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 5653 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 5654 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 5655 | |
| 5656 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
| 5657 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 5658 | dev->pio_mask = UINT_MAX; |
| 5659 | dev->mwdma_mask = UINT_MAX; |
| 5660 | dev->udma_mask = UINT_MAX; |
| 5661 | } |
| 5662 | |
| 5663 | /** |
Brian King | 155a8a9 | 2006-08-07 14:27:17 -0500 | [diff] [blame] | 5664 | * ata_port_init - Initialize an ata_port structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5665 | * @ap: Structure to initialize |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5666 | * @host: Collection of hosts to which @ap belongs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5667 | * @ent: Probe information provided by low-level driver |
| 5668 | * @port_no: Port number associated with this ata_port |
| 5669 | * |
Brian King | 155a8a9 | 2006-08-07 14:27:17 -0500 | [diff] [blame] | 5670 | * Initialize a new ata_port structure. |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5671 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5672 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5673 | * Inherited from caller. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5674 | */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5675 | void ata_port_init(struct ata_port *ap, struct ata_host *host, |
Brian King | 155a8a9 | 2006-08-07 14:27:17 -0500 | [diff] [blame] | 5676 | const struct ata_probe_ent *ent, unsigned int port_no) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5677 | { |
| 5678 | unsigned int i; |
| 5679 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5680 | ap->lock = &host->lock; |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 5681 | ap->flags = ATA_FLAG_DISABLED; |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5682 | ap->print_id = ata_print_id++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5683 | ap->ctl = ATA_DEVCTL_OBS; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5684 | ap->host = host; |
Brian King | 2f1f610 | 2006-03-23 17:30:15 -0600 | [diff] [blame] | 5685 | ap->dev = ent->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5686 | ap->port_no = port_no; |
Tejun Heo | fea63e3 | 2006-09-16 03:04:15 +0900 | [diff] [blame] | 5687 | if (port_no == 1 && ent->pinfo2) { |
| 5688 | ap->pio_mask = ent->pinfo2->pio_mask; |
| 5689 | ap->mwdma_mask = ent->pinfo2->mwdma_mask; |
| 5690 | ap->udma_mask = ent->pinfo2->udma_mask; |
| 5691 | ap->flags |= ent->pinfo2->flags; |
| 5692 | ap->ops = ent->pinfo2->port_ops; |
| 5693 | } else { |
| 5694 | ap->pio_mask = ent->pio_mask; |
| 5695 | ap->mwdma_mask = ent->mwdma_mask; |
| 5696 | ap->udma_mask = ent->udma_mask; |
| 5697 | ap->flags |= ent->port_flags; |
| 5698 | ap->ops = ent->port_ops; |
| 5699 | } |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 5700 | ap->hw_sata_spd_limit = UINT_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5701 | ap->active_tag = ATA_TAG_POISON; |
| 5702 | ap->last_ctl = 0xFF; |
Borislav Petkov | bd5d825 | 2006-06-11 23:17:01 -0400 | [diff] [blame] | 5703 | |
| 5704 | #if defined(ATA_VERBOSE_DEBUG) |
| 5705 | /* turn on all debugging levels */ |
| 5706 | ap->msg_enable = 0x00FF; |
| 5707 | #elif defined(ATA_DEBUG) |
| 5708 | 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] | 5709 | #else |
Borislav Petkov | 0dd4b21 | 2006-06-23 02:29:08 -0400 | [diff] [blame] | 5710 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
Borislav Petkov | bd5d825 | 2006-06-11 23:17:01 -0400 | [diff] [blame] | 5711 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5712 | |
David Howells | 65f27f3 | 2006-11-22 14:55:48 +0000 | [diff] [blame] | 5713 | INIT_DELAYED_WORK(&ap->port_task, NULL); |
| 5714 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
| 5715 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); |
Tejun Heo | a72ec4c | 2006-01-23 13:09:37 +0900 | [diff] [blame] | 5716 | INIT_LIST_HEAD(&ap->eh_done_q); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 5717 | init_waitqueue_head(&ap->eh_wait_q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5718 | |
Tejun Heo | 838df62 | 2006-05-15 20:57:44 +0900 | [diff] [blame] | 5719 | /* set cable type */ |
| 5720 | ap->cbl = ATA_CBL_NONE; |
| 5721 | if (ap->flags & ATA_FLAG_SATA) |
| 5722 | ap->cbl = ATA_CBL_SATA; |
| 5723 | |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 5724 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 5725 | struct ata_device *dev = &ap->device[i]; |
Tejun Heo | 38d8723 | 2006-05-15 20:57:51 +0900 | [diff] [blame] | 5726 | dev->ap = ap; |
Tejun Heo | 72fa4b7 | 2006-05-31 18:27:32 +0900 | [diff] [blame] | 5727 | dev->devno = i; |
Tejun Heo | 3ef3b43 | 2006-05-31 18:27:30 +0900 | [diff] [blame] | 5728 | ata_dev_init(dev); |
Tejun Heo | acf356b | 2006-03-24 14:07:50 +0900 | [diff] [blame] | 5729 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5730 | |
| 5731 | #ifdef ATA_IRQ_TRAP |
| 5732 | ap->stats.unhandled_irq = 1; |
| 5733 | ap->stats.idle_irq = 1; |
| 5734 | #endif |
| 5735 | |
| 5736 | memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); |
| 5737 | } |
| 5738 | |
| 5739 | /** |
Tejun Heo | 4608c16 | 2006-08-10 16:59:01 +0900 | [diff] [blame] | 5740 | * ata_port_init_shost - Initialize SCSI host associated with ATA port |
| 5741 | * @ap: ATA port to initialize SCSI host for |
| 5742 | * @shost: SCSI host associated with @ap |
Brian King | 155a8a9 | 2006-08-07 14:27:17 -0500 | [diff] [blame] | 5743 | * |
Tejun Heo | 4608c16 | 2006-08-10 16:59:01 +0900 | [diff] [blame] | 5744 | * Initialize SCSI host @shost associated with ATA port @ap. |
Brian King | 155a8a9 | 2006-08-07 14:27:17 -0500 | [diff] [blame] | 5745 | * |
| 5746 | * LOCKING: |
| 5747 | * Inherited from caller. |
| 5748 | */ |
Tejun Heo | 4608c16 | 2006-08-10 16:59:01 +0900 | [diff] [blame] | 5749 | static void ata_port_init_shost(struct ata_port *ap, struct Scsi_Host *shost) |
Brian King | 155a8a9 | 2006-08-07 14:27:17 -0500 | [diff] [blame] | 5750 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5751 | ap->scsi_host = shost; |
Brian King | 155a8a9 | 2006-08-07 14:27:17 -0500 | [diff] [blame] | 5752 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 5753 | shost->unique_id = ap->print_id; |
Tejun Heo | 4608c16 | 2006-08-10 16:59:01 +0900 | [diff] [blame] | 5754 | shost->max_id = 16; |
| 5755 | shost->max_lun = 1; |
| 5756 | shost->max_channel = 1; |
Mark Lord | f0ef88e | 2007-02-02 12:36:25 -0500 | [diff] [blame] | 5757 | shost->max_cmd_len = 16; |
Brian King | 155a8a9 | 2006-08-07 14:27:17 -0500 | [diff] [blame] | 5758 | } |
| 5759 | |
| 5760 | /** |
Jeff Garzik | 996139f | 2006-08-10 16:59:03 +0900 | [diff] [blame] | 5761 | * ata_port_add - Attach low-level ATA driver to system |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5762 | * @ent: Information provided by low-level driver |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5763 | * @host: Collections of ports to which we add |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5764 | * @port_no: Port number associated with this host |
| 5765 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5766 | * Attach low-level ATA driver to system. |
| 5767 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5768 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5769 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5770 | * |
| 5771 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5772 | * New ata_port on success, for NULL on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5773 | */ |
Jeff Garzik | 996139f | 2006-08-10 16:59:03 +0900 | [diff] [blame] | 5774 | static struct ata_port * ata_port_add(const struct ata_probe_ent *ent, |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5775 | struct ata_host *host, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5776 | unsigned int port_no) |
| 5777 | { |
Jeff Garzik | 996139f | 2006-08-10 16:59:03 +0900 | [diff] [blame] | 5778 | struct Scsi_Host *shost; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5779 | struct ata_port *ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5780 | |
| 5781 | DPRINTK("ENTER\n"); |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 5782 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 5783 | if (!ent->port_ops->error_handler && |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5784 | !(ent->port_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) { |
Tejun Heo | aec5c3c | 2006-03-25 01:33:34 +0900 | [diff] [blame] | 5785 | printk(KERN_ERR "ata%u: no reset mechanism available\n", |
| 5786 | port_no); |
| 5787 | return NULL; |
| 5788 | } |
| 5789 | |
Jeff Garzik | 996139f | 2006-08-10 16:59:03 +0900 | [diff] [blame] | 5790 | shost = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); |
| 5791 | if (!shost) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5792 | return NULL; |
| 5793 | |
Jeff Garzik | 996139f | 2006-08-10 16:59:03 +0900 | [diff] [blame] | 5794 | shost->transportt = &ata_scsi_transport_template; |
Tejun Heo | 30afc84 | 2006-03-18 18:40:14 +0900 | [diff] [blame] | 5795 | |
Jeff Garzik | 996139f | 2006-08-10 16:59:03 +0900 | [diff] [blame] | 5796 | ap = ata_shost_to_port(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5797 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5798 | ata_port_init(ap, host, ent, port_no); |
Jeff Garzik | 996139f | 2006-08-10 16:59:03 +0900 | [diff] [blame] | 5799 | ata_port_init_shost(ap, shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5800 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5801 | return ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5802 | } |
| 5803 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5804 | static void ata_host_release(struct device *gendev, void *res) |
| 5805 | { |
| 5806 | struct ata_host *host = dev_get_drvdata(gendev); |
| 5807 | int i; |
| 5808 | |
| 5809 | for (i = 0; i < host->n_ports; i++) { |
| 5810 | struct ata_port *ap = host->ports[i]; |
| 5811 | |
Tejun Heo | 1aa506e | 2007-03-09 19:36:12 +0900 | [diff] [blame] | 5812 | if (ap && ap->ops->port_stop) |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5813 | ap->ops->port_stop(ap); |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5814 | } |
| 5815 | |
| 5816 | if (host->ops->host_stop) |
| 5817 | host->ops->host_stop(host); |
Tejun Heo | 1aa56cc | 2007-02-27 22:33:21 +0900 | [diff] [blame] | 5818 | |
Tejun Heo | 1aa506e | 2007-03-09 19:36:12 +0900 | [diff] [blame] | 5819 | for (i = 0; i < host->n_ports; i++) { |
| 5820 | struct ata_port *ap = host->ports[i]; |
| 5821 | |
| 5822 | if (ap) |
| 5823 | scsi_host_put(ap->scsi_host); |
| 5824 | |
| 5825 | host->ports[i] = NULL; |
| 5826 | } |
| 5827 | |
Tejun Heo | 1aa56cc | 2007-02-27 22:33:21 +0900 | [diff] [blame] | 5828 | dev_set_drvdata(gendev, NULL); |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5829 | } |
| 5830 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5831 | /** |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5832 | * ata_sas_host_init - Initialize a host struct |
| 5833 | * @host: host to initialize |
| 5834 | * @dev: device host is attached to |
| 5835 | * @flags: host flags |
| 5836 | * @ops: port_ops |
Brian King | b03732f | 2006-08-07 14:27:10 -0500 | [diff] [blame] | 5837 | * |
| 5838 | * LOCKING: |
| 5839 | * PCI/etc. bus probe sem. |
| 5840 | * |
| 5841 | */ |
| 5842 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5843 | void ata_host_init(struct ata_host *host, struct device *dev, |
| 5844 | unsigned long flags, const struct ata_port_operations *ops) |
Brian King | b03732f | 2006-08-07 14:27:10 -0500 | [diff] [blame] | 5845 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5846 | spin_lock_init(&host->lock); |
| 5847 | host->dev = dev; |
| 5848 | host->flags = flags; |
| 5849 | host->ops = ops; |
Brian King | b03732f | 2006-08-07 14:27:10 -0500 | [diff] [blame] | 5850 | } |
| 5851 | |
| 5852 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5853 | * ata_device_add - Register hardware device with ATA and SCSI layers |
| 5854 | * @ent: Probe information describing hardware device to be registered |
| 5855 | * |
| 5856 | * This function processes the information provided in the probe |
| 5857 | * information struct @ent, allocates the necessary ATA and SCSI |
| 5858 | * host information structures, initializes them, and registers |
| 5859 | * everything with requisite kernel subsystems. |
| 5860 | * |
| 5861 | * This function requests irqs, probes the ATA bus, and probes |
| 5862 | * the SCSI bus. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5863 | * |
| 5864 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5865 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5866 | * |
| 5867 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5868 | * Number of ports registered. Zero on error (no ports registered). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5869 | */ |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 5870 | int ata_device_add(const struct ata_probe_ent *ent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5871 | { |
Jeff Garzik | 6d0500d | 2006-08-10 16:59:05 +0900 | [diff] [blame] | 5872 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5873 | struct device *dev = ent->dev; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5874 | struct ata_host *host; |
Jeff Garzik | 39b07ce | 2006-06-11 23:59:44 -0400 | [diff] [blame] | 5875 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5876 | |
| 5877 | DPRINTK("ENTER\n"); |
Jeff Garzik | f20b16f | 2006-12-11 11:14:06 -0500 | [diff] [blame] | 5878 | |
Alan Cox | 02f076a | 2006-09-26 17:35:32 +0100 | [diff] [blame] | 5879 | if (ent->irq == 0) { |
| 5880 | dev_printk(KERN_ERR, dev, "is not available: No interrupt assigned.\n"); |
| 5881 | return 0; |
| 5882 | } |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5883 | |
| 5884 | if (!devres_open_group(dev, ata_device_add, GFP_KERNEL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5885 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5886 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5887 | /* alloc a container for our list of ATA ports (buses) */ |
| 5888 | host = devres_alloc(ata_host_release, sizeof(struct ata_host) + |
| 5889 | (ent->n_ports * sizeof(void *)), GFP_KERNEL); |
| 5890 | if (!host) |
| 5891 | goto err_out; |
| 5892 | devres_add(dev, host); |
| 5893 | dev_set_drvdata(dev, host); |
| 5894 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5895 | ata_host_init(host, dev, ent->_host_flags, ent->port_ops); |
| 5896 | host->n_ports = ent->n_ports; |
| 5897 | host->irq = ent->irq; |
| 5898 | host->irq2 = ent->irq2; |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 5899 | host->iomap = ent->iomap; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5900 | host->private_data = ent->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5901 | |
| 5902 | /* register each port bound to this device */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5903 | for (i = 0; i < host->n_ports; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5904 | struct ata_port *ap; |
| 5905 | unsigned long xfer_mode_mask; |
Alan Cox | 2ec7df0 | 2006-08-10 16:59:10 +0900 | [diff] [blame] | 5906 | int irq_line = ent->irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5907 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5908 | ap = ata_port_add(ent, host, i); |
Dave Jones | c38778c | 2006-09-26 23:52:50 -0700 | [diff] [blame] | 5909 | host->ports[i] = ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5910 | if (!ap) |
| 5911 | goto err_out; |
| 5912 | |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 5913 | /* dummy? */ |
| 5914 | if (ent->dummy_port_mask & (1 << i)) { |
| 5915 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
| 5916 | ap->ops = &ata_dummy_port_ops; |
| 5917 | continue; |
| 5918 | } |
| 5919 | |
| 5920 | /* start port */ |
| 5921 | rc = ap->ops->port_start(ap); |
| 5922 | if (rc) { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5923 | host->ports[i] = NULL; |
| 5924 | scsi_host_put(ap->scsi_host); |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 5925 | goto err_out; |
| 5926 | } |
| 5927 | |
Alan Cox | 2ec7df0 | 2006-08-10 16:59:10 +0900 | [diff] [blame] | 5928 | /* Report the secondary IRQ for second channel legacy */ |
| 5929 | if (i == 1 && ent->irq2) |
| 5930 | irq_line = ent->irq2; |
| 5931 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5932 | xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | |
| 5933 | (ap->mwdma_mask << ATA_SHIFT_MWDMA) | |
| 5934 | (ap->pio_mask << ATA_SHIFT_PIO); |
| 5935 | |
| 5936 | /* print per-port info to dmesg */ |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 5937 | ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " |
| 5938 | "ctl 0x%p bmdma 0x%p irq %d\n", |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 5939 | ap->flags & ATA_FLAG_SATA ? 'S' : 'P', |
| 5940 | ata_mode_string(xfer_mode_mask), |
| 5941 | ap->ioaddr.cmd_addr, |
| 5942 | ap->ioaddr.ctl_addr, |
| 5943 | ap->ioaddr.bmdma_addr, |
Alan Cox | 2ec7df0 | 2006-08-10 16:59:10 +0900 | [diff] [blame] | 5944 | irq_line); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5945 | |
Tejun Heo | 0f0a3ad | 2006-11-17 12:24:22 +0900 | [diff] [blame] | 5946 | /* freeze port before requesting IRQ */ |
| 5947 | ata_eh_freeze_port(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5948 | } |
| 5949 | |
Alan Cox | 2ec7df0 | 2006-08-10 16:59:10 +0900 | [diff] [blame] | 5950 | /* obtain irq, that may be shared between channels */ |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5951 | rc = devm_request_irq(dev, ent->irq, ent->port_ops->irq_handler, |
| 5952 | ent->irq_flags, DRV_NAME, host); |
Jeff Garzik | 39b07ce | 2006-06-11 23:59:44 -0400 | [diff] [blame] | 5953 | if (rc) { |
| 5954 | dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n", |
| 5955 | ent->irq, rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5956 | goto err_out; |
Jeff Garzik | 39b07ce | 2006-06-11 23:59:44 -0400 | [diff] [blame] | 5957 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5958 | |
Alan Cox | 2ec7df0 | 2006-08-10 16:59:10 +0900 | [diff] [blame] | 5959 | /* do we have a second IRQ for the other channel, eg legacy mode */ |
| 5960 | if (ent->irq2) { |
| 5961 | /* We will get weird core code crashes later if this is true |
| 5962 | so trap it now */ |
| 5963 | BUG_ON(ent->irq == ent->irq2); |
| 5964 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5965 | rc = devm_request_irq(dev, ent->irq2, |
| 5966 | ent->port_ops->irq_handler, ent->irq_flags, |
| 5967 | DRV_NAME, host); |
Alan Cox | 2ec7df0 | 2006-08-10 16:59:10 +0900 | [diff] [blame] | 5968 | if (rc) { |
| 5969 | dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n", |
| 5970 | ent->irq2, rc); |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5971 | goto err_out; |
Alan Cox | 2ec7df0 | 2006-08-10 16:59:10 +0900 | [diff] [blame] | 5972 | } |
| 5973 | } |
| 5974 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5975 | /* resource acquisition complete */ |
Tejun Heo | b878ca5 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5976 | devres_remove_group(dev, ata_device_add); |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 5977 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5978 | /* perform each probe synchronously */ |
| 5979 | DPRINTK("probe begin\n"); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5980 | for (i = 0; i < host->n_ports; i++) { |
| 5981 | struct ata_port *ap = host->ports[i]; |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 5982 | u32 scontrol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5983 | int rc; |
| 5984 | |
Tejun Heo | 5a04bf4 | 2006-05-31 18:27:38 +0900 | [diff] [blame] | 5985 | /* init sata_spd_limit to the current value */ |
| 5986 | if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { |
| 5987 | int spd = (scontrol >> 4) & 0xf; |
| 5988 | ap->hw_sata_spd_limit &= (1 << spd) - 1; |
| 5989 | } |
| 5990 | ap->sata_spd_limit = ap->hw_sata_spd_limit; |
| 5991 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 5992 | rc = scsi_add_host(ap->scsi_host, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5993 | if (rc) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 5994 | ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5995 | /* FIXME: do something useful here */ |
| 5996 | /* FIXME: handle unconditional calls to |
| 5997 | * scsi_scan_host and ata_host_remove, below, |
| 5998 | * at the very least |
| 5999 | */ |
| 6000 | } |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6001 | |
Tejun Heo | 52783c5 | 2006-05-31 18:28:22 +0900 | [diff] [blame] | 6002 | if (ap->ops->error_handler) { |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 6003 | struct ata_eh_info *ehi = &ap->eh_info; |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6004 | unsigned long flags; |
| 6005 | |
| 6006 | ata_port_probe(ap); |
| 6007 | |
| 6008 | /* kick EH for boot probing */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6009 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6010 | |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 6011 | ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; |
| 6012 | ehi->action |= ATA_EH_SOFTRESET; |
| 6013 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6014 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 6015 | ap->pflags |= ATA_PFLAG_LOADING; |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6016 | ata_port_schedule_eh(ap); |
| 6017 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6018 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6019 | |
| 6020 | /* wait for EH to finish */ |
| 6021 | ata_port_wait_eh(ap); |
| 6022 | } else { |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 6023 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6024 | rc = ata_bus_probe(ap); |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 6025 | DPRINTK("ata%u: bus probe end\n", ap->print_id); |
Tejun Heo | 3e70639 | 2006-05-31 18:28:11 +0900 | [diff] [blame] | 6026 | |
| 6027 | if (rc) { |
| 6028 | /* FIXME: do something useful here? |
| 6029 | * Current libata behavior will |
| 6030 | * tear down everything when |
| 6031 | * the module is removed |
| 6032 | * or the h/w is unplugged. |
| 6033 | */ |
| 6034 | } |
| 6035 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6036 | } |
| 6037 | |
| 6038 | /* probes are done, now scan each port's disk(s) */ |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 6039 | DPRINTK("host probe begin\n"); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6040 | for (i = 0; i < host->n_ports; i++) { |
| 6041 | struct ata_port *ap = host->ports[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6042 | |
Jeff Garzik | 644dd0c | 2005-10-03 15:55:19 -0400 | [diff] [blame] | 6043 | ata_scsi_scan_host(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6044 | } |
| 6045 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6046 | VPRINTK("EXIT, returning %u\n", ent->n_ports); |
| 6047 | return ent->n_ports; /* success */ |
| 6048 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6049 | err_out: |
| 6050 | devres_release_group(dev, ata_device_add); |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6051 | VPRINTK("EXIT, returning %d\n", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6052 | return 0; |
| 6053 | } |
| 6054 | |
| 6055 | /** |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6056 | * ata_port_detach - Detach ATA port in prepration of device removal |
| 6057 | * @ap: ATA port to be detached |
| 6058 | * |
| 6059 | * Detach all ATA devices and the associated SCSI devices of @ap; |
| 6060 | * then, remove the associated SCSI host. @ap is guaranteed to |
| 6061 | * be quiescent on return from this function. |
| 6062 | * |
| 6063 | * LOCKING: |
| 6064 | * Kernel thread context (may sleep). |
| 6065 | */ |
| 6066 | void ata_port_detach(struct ata_port *ap) |
| 6067 | { |
| 6068 | unsigned long flags; |
| 6069 | int i; |
| 6070 | |
| 6071 | if (!ap->ops->error_handler) |
Tejun Heo | c3cf30a | 2006-08-05 03:59:11 +0900 | [diff] [blame] | 6072 | goto skip_eh; |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6073 | |
| 6074 | /* tell EH we're leaving & flush EH */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6075 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 6076 | ap->pflags |= ATA_PFLAG_UNLOADING; |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6077 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6078 | |
| 6079 | ata_port_wait_eh(ap); |
| 6080 | |
| 6081 | /* EH is now guaranteed to see UNLOADING, so no new device |
| 6082 | * will be attached. Disable all existing devices. |
| 6083 | */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6084 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6085 | |
| 6086 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 6087 | ata_dev_disable(&ap->device[i]); |
| 6088 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6089 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6090 | |
| 6091 | /* Final freeze & EH. All in-flight commands are aborted. EH |
| 6092 | * will be skipped and retrials will be terminated with bad |
| 6093 | * target. |
| 6094 | */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6095 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6096 | ata_port_freeze(ap); /* won't be thawed */ |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 6097 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6098 | |
| 6099 | ata_port_wait_eh(ap); |
| 6100 | |
| 6101 | /* Flush hotplug task. The sequence is similar to |
| 6102 | * ata_port_flush_task(). |
| 6103 | */ |
| 6104 | flush_workqueue(ata_aux_wq); |
| 6105 | cancel_delayed_work(&ap->hotplug_task); |
| 6106 | flush_workqueue(ata_aux_wq); |
| 6107 | |
Tejun Heo | c3cf30a | 2006-08-05 03:59:11 +0900 | [diff] [blame] | 6108 | skip_eh: |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6109 | /* remove the associated SCSI host */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6110 | scsi_remove_host(ap->scsi_host); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 6111 | } |
| 6112 | |
| 6113 | /** |
Tejun Heo | 0529c15 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 6114 | * ata_host_detach - Detach all ports of an ATA host |
| 6115 | * @host: Host to detach |
| 6116 | * |
| 6117 | * Detach all ports of @host. |
| 6118 | * |
| 6119 | * LOCKING: |
| 6120 | * Kernel thread context (may sleep). |
| 6121 | */ |
| 6122 | void ata_host_detach(struct ata_host *host) |
| 6123 | { |
| 6124 | int i; |
| 6125 | |
| 6126 | for (i = 0; i < host->n_ports; i++) |
| 6127 | ata_port_detach(host->ports[i]); |
| 6128 | } |
| 6129 | |
Brian King | f6d950e | 2006-08-07 14:27:24 -0500 | [diff] [blame] | 6130 | struct ata_probe_ent * |
| 6131 | ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port) |
| 6132 | { |
| 6133 | struct ata_probe_ent *probe_ent; |
| 6134 | |
Tejun Heo | 4d05447 | 2007-02-18 02:24:37 +0900 | [diff] [blame] | 6135 | probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL); |
Brian King | f6d950e | 2006-08-07 14:27:24 -0500 | [diff] [blame] | 6136 | if (!probe_ent) { |
| 6137 | printk(KERN_ERR DRV_NAME "(%s): out of memory\n", |
| 6138 | kobject_name(&(dev->kobj))); |
| 6139 | return NULL; |
| 6140 | } |
| 6141 | |
| 6142 | INIT_LIST_HEAD(&probe_ent->node); |
| 6143 | probe_ent->dev = dev; |
| 6144 | |
| 6145 | probe_ent->sht = port->sht; |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6146 | probe_ent->port_flags = port->flags; |
Brian King | f6d950e | 2006-08-07 14:27:24 -0500 | [diff] [blame] | 6147 | probe_ent->pio_mask = port->pio_mask; |
| 6148 | probe_ent->mwdma_mask = port->mwdma_mask; |
| 6149 | probe_ent->udma_mask = port->udma_mask; |
| 6150 | probe_ent->port_ops = port->port_ops; |
Jeff Garzik | d639ca9 | 2006-09-28 03:48:18 -0400 | [diff] [blame] | 6151 | probe_ent->private_data = port->private_data; |
Brian King | f6d950e | 2006-08-07 14:27:24 -0500 | [diff] [blame] | 6152 | |
| 6153 | return probe_ent; |
| 6154 | } |
| 6155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6156 | /** |
| 6157 | * ata_std_ports - initialize ioaddr with standard port offsets. |
| 6158 | * @ioaddr: IO address structure to be initialized |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6159 | * |
| 6160 | * Utility function which initializes data_addr, error_addr, |
| 6161 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, |
| 6162 | * device_addr, status_addr, and command_addr to standard offsets |
| 6163 | * relative to cmd_addr. |
| 6164 | * |
| 6165 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6166 | */ |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6168 | void ata_std_ports(struct ata_ioports *ioaddr) |
| 6169 | { |
| 6170 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; |
| 6171 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; |
| 6172 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; |
| 6173 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; |
| 6174 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; |
| 6175 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; |
| 6176 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; |
| 6177 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; |
| 6178 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; |
| 6179 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; |
| 6180 | } |
| 6181 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6182 | |
Jeff Garzik | 374b187 | 2005-08-30 05:42:52 -0400 | [diff] [blame] | 6183 | #ifdef CONFIG_PCI |
| 6184 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 6185 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6186 | * ata_pci_remove_one - PCI layer callback for device removal |
| 6187 | * @pdev: PCI device that was removed |
| 6188 | * |
Tejun Heo | b878ca5 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6189 | * PCI layer indicates to libata via this hook that hot-unplug or |
| 6190 | * module unload event has occurred. Detach all ports. Resource |
| 6191 | * release is handled via devres. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6192 | * |
| 6193 | * LOCKING: |
| 6194 | * Inherited from PCI layer (may sleep). |
| 6195 | */ |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6196 | void ata_pci_remove_one(struct pci_dev *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6197 | { |
| 6198 | struct device *dev = pci_dev_to_dev(pdev); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6199 | struct ata_host *host = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6200 | |
Tejun Heo | b878ca5 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6201 | ata_host_detach(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6202 | } |
| 6203 | |
| 6204 | /* move to PCI subsystem */ |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 6205 | 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] | 6206 | { |
| 6207 | unsigned long tmp = 0; |
| 6208 | |
| 6209 | switch (bits->width) { |
| 6210 | case 1: { |
| 6211 | u8 tmp8 = 0; |
| 6212 | pci_read_config_byte(pdev, bits->reg, &tmp8); |
| 6213 | tmp = tmp8; |
| 6214 | break; |
| 6215 | } |
| 6216 | case 2: { |
| 6217 | u16 tmp16 = 0; |
| 6218 | pci_read_config_word(pdev, bits->reg, &tmp16); |
| 6219 | tmp = tmp16; |
| 6220 | break; |
| 6221 | } |
| 6222 | case 4: { |
| 6223 | u32 tmp32 = 0; |
| 6224 | pci_read_config_dword(pdev, bits->reg, &tmp32); |
| 6225 | tmp = tmp32; |
| 6226 | break; |
| 6227 | } |
| 6228 | |
| 6229 | default: |
| 6230 | return -EINVAL; |
| 6231 | } |
| 6232 | |
| 6233 | tmp &= bits->mask; |
| 6234 | |
| 6235 | return (tmp == bits->val) ? 1 : 0; |
| 6236 | } |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6237 | |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6238 | #ifdef CONFIG_PM |
Tejun Heo | 3c5100c | 2006-07-26 16:58:33 +0900 | [diff] [blame] | 6239 | 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] | 6240 | { |
| 6241 | pci_save_state(pdev); |
Tejun Heo | 4c90d97 | 2007-02-20 18:14:48 +0900 | [diff] [blame] | 6242 | pci_disable_device(pdev); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6243 | |
Tejun Heo | 4c90d97 | 2007-02-20 18:14:48 +0900 | [diff] [blame] | 6244 | if (mesg.event == PM_EVENT_SUSPEND) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6245 | pci_set_power_state(pdev, PCI_D3hot); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6246 | } |
| 6247 | |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6248 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6249 | { |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6250 | int rc; |
| 6251 | |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6252 | pci_set_power_state(pdev, PCI_D0); |
| 6253 | pci_restore_state(pdev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6254 | |
Tejun Heo | b878ca5 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 6255 | rc = pcim_enable_device(pdev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6256 | if (rc) { |
| 6257 | dev_printk(KERN_ERR, &pdev->dev, |
| 6258 | "failed to enable device after resume (%d)\n", rc); |
| 6259 | return rc; |
| 6260 | } |
| 6261 | |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6262 | pci_set_master(pdev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6263 | return 0; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6264 | } |
| 6265 | |
Tejun Heo | 3c5100c | 2006-07-26 16:58:33 +0900 | [diff] [blame] | 6266 | 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] | 6267 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6268 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6269 | int rc = 0; |
| 6270 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6271 | rc = ata_host_suspend(host, mesg); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6272 | if (rc) |
| 6273 | return rc; |
| 6274 | |
Tejun Heo | 3c5100c | 2006-07-26 16:58:33 +0900 | [diff] [blame] | 6275 | ata_pci_device_do_suspend(pdev, mesg); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6276 | |
| 6277 | return 0; |
| 6278 | } |
| 6279 | |
| 6280 | int ata_pci_device_resume(struct pci_dev *pdev) |
| 6281 | { |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6282 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6283 | int rc; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6284 | |
Tejun Heo | 553c4aa | 2006-12-26 19:39:50 +0900 | [diff] [blame] | 6285 | rc = ata_pci_device_do_resume(pdev); |
| 6286 | if (rc == 0) |
| 6287 | ata_host_resume(host); |
| 6288 | return rc; |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6289 | } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6290 | #endif /* CONFIG_PM */ |
| 6291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6292 | #endif /* CONFIG_PCI */ |
| 6293 | |
| 6294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6295 | static int __init ata_init(void) |
| 6296 | { |
Andrew Morton | a8601e5 | 2006-06-25 01:36:52 -0700 | [diff] [blame] | 6297 | ata_probe_timeout *= HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6298 | ata_wq = create_workqueue("ata"); |
| 6299 | if (!ata_wq) |
| 6300 | return -ENOMEM; |
| 6301 | |
Tejun Heo | 453b07a | 2006-05-31 18:27:42 +0900 | [diff] [blame] | 6302 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
| 6303 | if (!ata_aux_wq) { |
| 6304 | destroy_workqueue(ata_wq); |
| 6305 | return -ENOMEM; |
| 6306 | } |
| 6307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6308 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
| 6309 | return 0; |
| 6310 | } |
| 6311 | |
| 6312 | static void __exit ata_exit(void) |
| 6313 | { |
| 6314 | destroy_workqueue(ata_wq); |
Tejun Heo | 453b07a | 2006-05-31 18:27:42 +0900 | [diff] [blame] | 6315 | destroy_workqueue(ata_aux_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6316 | } |
| 6317 | |
Brian King | a462508 | 2006-11-13 16:32:36 -0600 | [diff] [blame] | 6318 | subsys_initcall(ata_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6319 | module_exit(ata_exit); |
| 6320 | |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 6321 | static unsigned long ratelimit_time; |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 6322 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 6323 | |
| 6324 | int ata_ratelimit(void) |
| 6325 | { |
| 6326 | int rc; |
| 6327 | unsigned long flags; |
| 6328 | |
| 6329 | spin_lock_irqsave(&ata_ratelimit_lock, flags); |
| 6330 | |
| 6331 | if (time_after(jiffies, ratelimit_time)) { |
| 6332 | rc = 1; |
| 6333 | ratelimit_time = jiffies + (HZ/5); |
| 6334 | } else |
| 6335 | rc = 0; |
| 6336 | |
| 6337 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); |
| 6338 | |
| 6339 | return rc; |
| 6340 | } |
| 6341 | |
Tejun Heo | c22daff | 2006-04-11 22:22:29 +0900 | [diff] [blame] | 6342 | /** |
| 6343 | * ata_wait_register - wait until register value changes |
| 6344 | * @reg: IO-mapped register |
| 6345 | * @mask: Mask to apply to read register value |
| 6346 | * @val: Wait condition |
| 6347 | * @interval_msec: polling interval in milliseconds |
| 6348 | * @timeout_msec: timeout in milliseconds |
| 6349 | * |
| 6350 | * Waiting for some bits of register to change is a common |
| 6351 | * operation for ATA controllers. This function reads 32bit LE |
| 6352 | * IO-mapped register @reg and tests for the following condition. |
| 6353 | * |
| 6354 | * (*@reg & mask) != val |
| 6355 | * |
| 6356 | * If the condition is met, it returns; otherwise, the process is |
| 6357 | * repeated after @interval_msec until timeout. |
| 6358 | * |
| 6359 | * LOCKING: |
| 6360 | * Kernel thread context (may sleep) |
| 6361 | * |
| 6362 | * RETURNS: |
| 6363 | * The final register value. |
| 6364 | */ |
| 6365 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, |
| 6366 | unsigned long interval_msec, |
| 6367 | unsigned long timeout_msec) |
| 6368 | { |
| 6369 | unsigned long timeout; |
| 6370 | u32 tmp; |
| 6371 | |
| 6372 | tmp = ioread32(reg); |
| 6373 | |
| 6374 | /* Calculate timeout _after_ the first read to make sure |
| 6375 | * preceding writes reach the controller before starting to |
| 6376 | * eat away the timeout. |
| 6377 | */ |
| 6378 | timeout = jiffies + (timeout_msec * HZ) / 1000; |
| 6379 | |
| 6380 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { |
| 6381 | msleep(interval_msec); |
| 6382 | tmp = ioread32(reg); |
| 6383 | } |
| 6384 | |
| 6385 | return tmp; |
| 6386 | } |
| 6387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6388 | /* |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 6389 | * Dummy port_ops |
| 6390 | */ |
| 6391 | static void ata_dummy_noret(struct ata_port *ap) { } |
| 6392 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } |
| 6393 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } |
| 6394 | |
| 6395 | static u8 ata_dummy_check_status(struct ata_port *ap) |
| 6396 | { |
| 6397 | return ATA_DRDY; |
| 6398 | } |
| 6399 | |
| 6400 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) |
| 6401 | { |
| 6402 | return AC_ERR_SYSTEM; |
| 6403 | } |
| 6404 | |
| 6405 | const struct ata_port_operations ata_dummy_port_ops = { |
| 6406 | .port_disable = ata_port_disable, |
| 6407 | .check_status = ata_dummy_check_status, |
| 6408 | .check_altstatus = ata_dummy_check_status, |
| 6409 | .dev_select = ata_noop_dev_select, |
| 6410 | .qc_prep = ata_noop_qc_prep, |
| 6411 | .qc_issue = ata_dummy_qc_issue, |
| 6412 | .freeze = ata_dummy_noret, |
| 6413 | .thaw = ata_dummy_noret, |
| 6414 | .error_handler = ata_dummy_noret, |
| 6415 | .post_internal_cmd = ata_dummy_qc_noret, |
| 6416 | .irq_clear = ata_dummy_noret, |
| 6417 | .port_start = ata_dummy_ret0, |
| 6418 | .port_stop = ata_dummy_noret, |
| 6419 | }; |
| 6420 | |
| 6421 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6422 | * libata is essentially a library of internal helper functions for |
| 6423 | * low-level ATA host controller drivers. As such, the API/ABI is |
| 6424 | * likely to change as new drivers are added and updated. |
| 6425 | * Do not depend on ABI/API stability. |
| 6426 | */ |
| 6427 | |
Tejun Heo | e9c8391 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 6428 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
| 6429 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); |
| 6430 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); |
Tejun Heo | dd5b06c | 2006-08-10 16:59:12 +0900 | [diff] [blame] | 6431 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6432 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
| 6433 | EXPORT_SYMBOL_GPL(ata_std_ports); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6434 | EXPORT_SYMBOL_GPL(ata_host_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6435 | EXPORT_SYMBOL_GPL(ata_device_add); |
Tejun Heo | 0529c15 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 6436 | EXPORT_SYMBOL_GPL(ata_host_detach); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6437 | EXPORT_SYMBOL_GPL(ata_sg_init); |
| 6438 | EXPORT_SYMBOL_GPL(ata_sg_init_one); |
Tejun Heo | 9a1004d | 2006-05-31 18:27:52 +0900 | [diff] [blame] | 6439 | EXPORT_SYMBOL_GPL(ata_hsm_move); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 6440 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
Tejun Heo | dedaf2b | 2006-05-15 21:03:43 +0900 | [diff] [blame] | 6441 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6442 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6443 | EXPORT_SYMBOL_GPL(ata_tf_load); |
| 6444 | EXPORT_SYMBOL_GPL(ata_tf_read); |
| 6445 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); |
| 6446 | EXPORT_SYMBOL_GPL(ata_std_dev_select); |
Jeff Garzik | 43727fb | 2007-02-25 16:50:52 -0500 | [diff] [blame] | 6447 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6448 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
| 6449 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); |
| 6450 | EXPORT_SYMBOL_GPL(ata_check_status); |
| 6451 | EXPORT_SYMBOL_GPL(ata_altstatus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6452 | EXPORT_SYMBOL_GPL(ata_exec_command); |
| 6453 | EXPORT_SYMBOL_GPL(ata_port_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6454 | EXPORT_SYMBOL_GPL(ata_interrupt); |
Alan | 0435182 | 2007-03-06 02:37:52 -0800 | [diff] [blame] | 6455 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 6456 | EXPORT_SYMBOL_GPL(ata_data_xfer); |
| 6457 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6458 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
Brian King | e46834c | 2006-03-17 17:04:03 -0600 | [diff] [blame] | 6459 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6460 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
| 6461 | EXPORT_SYMBOL_GPL(ata_bmdma_start); |
| 6462 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); |
| 6463 | EXPORT_SYMBOL_GPL(ata_bmdma_status); |
| 6464 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 6465 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
| 6466 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); |
| 6467 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); |
| 6468 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); |
| 6469 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6470 | EXPORT_SYMBOL_GPL(ata_port_probe); |
Alan | 10305f0 | 2007-02-20 18:01:59 +0000 | [diff] [blame] | 6471 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
Tejun Heo | 3c567b7 | 2006-05-15 20:57:23 +0900 | [diff] [blame] | 6472 | EXPORT_SYMBOL_GPL(sata_set_spd); |
Tejun Heo | d7bb4cc | 2006-05-31 18:27:46 +0900 | [diff] [blame] | 6473 | EXPORT_SYMBOL_GPL(sata_phy_debounce); |
| 6474 | EXPORT_SYMBOL_GPL(sata_phy_resume); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6475 | EXPORT_SYMBOL_GPL(sata_phy_reset); |
| 6476 | EXPORT_SYMBOL_GPL(__sata_phy_reset); |
| 6477 | EXPORT_SYMBOL_GPL(ata_bus_reset); |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 6478 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 6479 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
Tejun Heo | b6103f6 | 2006-11-01 17:59:53 +0900 | [diff] [blame] | 6480 | EXPORT_SYMBOL_GPL(sata_port_hardreset); |
Tejun Heo | c2bd580 | 2006-01-24 17:05:22 +0900 | [diff] [blame] | 6481 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
| 6482 | EXPORT_SYMBOL_GPL(ata_std_postreset); |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 6483 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
| 6484 | EXPORT_SYMBOL_GPL(ata_dev_pair); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6485 | EXPORT_SYMBOL_GPL(ata_port_disable); |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 6486 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
Tejun Heo | c22daff | 2006-04-11 22:22:29 +0900 | [diff] [blame] | 6487 | EXPORT_SYMBOL_GPL(ata_wait_register); |
Tejun Heo | 6f8b995 | 2006-01-24 17:05:21 +0900 | [diff] [blame] | 6488 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
Tejun Heo | 86e45b6 | 2006-03-05 15:29:09 +0900 | [diff] [blame] | 6489 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6490 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
| 6491 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6492 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
Tejun Heo | 83c47bc | 2006-05-31 18:28:07 +0900 | [diff] [blame] | 6493 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 6494 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6495 | EXPORT_SYMBOL_GPL(ata_host_intr); |
Tejun Heo | 34bf217 | 2006-05-15 20:57:46 +0900 | [diff] [blame] | 6496 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
| 6497 | EXPORT_SYMBOL_GPL(sata_scr_read); |
| 6498 | EXPORT_SYMBOL_GPL(sata_scr_write); |
| 6499 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); |
| 6500 | EXPORT_SYMBOL_GPL(ata_port_online); |
| 6501 | EXPORT_SYMBOL_GPL(ata_port_offline); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6502 | #ifdef CONFIG_PM |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 6503 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
| 6504 | EXPORT_SYMBOL_GPL(ata_host_resume); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6505 | #endif /* CONFIG_PM */ |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 6506 | EXPORT_SYMBOL_GPL(ata_id_string); |
| 6507 | EXPORT_SYMBOL_GPL(ata_id_c_string); |
Alan | 10305f0 | 2007-02-20 18:01:59 +0000 | [diff] [blame] | 6508 | EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); |
Alan Cox | 6919a0a | 2006-10-27 19:08:46 -0700 | [diff] [blame] | 6509 | EXPORT_SYMBOL_GPL(ata_device_blacklisted); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6510 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
| 6511 | |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 6512 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 6513 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
| 6514 | EXPORT_SYMBOL_GPL(ata_timing_merge); |
| 6515 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6516 | #ifdef CONFIG_PCI |
| 6517 | EXPORT_SYMBOL_GPL(pci_test_config_bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6518 | EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); |
| 6519 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
| 6520 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6521 | #ifdef CONFIG_PM |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 6522 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
| 6523 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6524 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
| 6525 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6526 | #endif /* CONFIG_PM */ |
Alan Cox | 67951ad | 2006-03-22 15:55:54 +0000 | [diff] [blame] | 6527 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
| 6528 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6529 | #endif /* CONFIG_PCI */ |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6530 | |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6531 | #ifdef CONFIG_PM |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 6532 | EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); |
| 6533 | EXPORT_SYMBOL_GPL(ata_scsi_device_resume); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 6534 | #endif /* CONFIG_PM */ |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 6535 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 6536 | EXPORT_SYMBOL_GPL(ata_eng_timeout); |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 6537 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
| 6538 | EXPORT_SYMBOL_GPL(ata_port_abort); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 6539 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
| 6540 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
| 6541 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 6542 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
| 6543 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 6544 | EXPORT_SYMBOL_GPL(ata_do_eh); |
Akira Iguchi | 8362500 | 2007-01-26 16:27:32 +0900 | [diff] [blame] | 6545 | EXPORT_SYMBOL_GPL(ata_irq_on); |
| 6546 | EXPORT_SYMBOL_GPL(ata_dummy_irq_on); |
| 6547 | EXPORT_SYMBOL_GPL(ata_irq_ack); |
| 6548 | EXPORT_SYMBOL_GPL(ata_dummy_irq_ack); |
Akira Iguchi | a619f981b | 2007-01-26 16:28:18 +0900 | [diff] [blame] | 6549 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); |
Alan Cox | be0d18d | 2007-03-06 02:37:56 -0800 | [diff] [blame] | 6550 | |
| 6551 | EXPORT_SYMBOL_GPL(ata_cable_40wire); |
| 6552 | EXPORT_SYMBOL_GPL(ata_cable_80wire); |
| 6553 | EXPORT_SYMBOL_GPL(ata_cable_unknown); |
| 6554 | EXPORT_SYMBOL_GPL(ata_cable_sata); |