Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1 | /* |
| 2 | * libata-eh.c - libata error handling |
| 3 | * |
| 4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> |
| 5 | * Please ALWAYS copy linux-ide@vger.kernel.org |
| 6 | * on emails. |
| 7 | * |
| 8 | * Copyright 2006 Tejun Heo <htejun@gmail.com> |
| 9 | * |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License as |
| 13 | * published by the Free Software Foundation; either version 2, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 | * General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; see the file COPYING. If not, write to |
| 23 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, |
| 24 | * 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 | * |
| 33 | */ |
| 34 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 35 | #include <linux/kernel.h> |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 36 | #include <linux/blkdev.h> |
Jeff Garzik | 2855568 | 2007-10-11 17:12:35 -0400 | [diff] [blame] | 37 | #include <linux/pci.h> |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 38 | #include <scsi/scsi.h> |
| 39 | #include <scsi/scsi_host.h> |
| 40 | #include <scsi/scsi_eh.h> |
| 41 | #include <scsi/scsi_device.h> |
| 42 | #include <scsi/scsi_cmnd.h> |
Jeff Garzik | c6fd280 | 2006-08-10 07:31:37 -0400 | [diff] [blame] | 43 | #include "../scsi/scsi_transport_api.h" |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 44 | |
| 45 | #include <linux/libata.h> |
| 46 | |
| 47 | #include "libata.h" |
| 48 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 49 | enum { |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 50 | /* speed down verdicts */ |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 51 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
| 52 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), |
| 53 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 54 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 55 | |
| 56 | /* error flags */ |
| 57 | ATA_EFLAG_IS_IO = (1 << 0), |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 58 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 59 | |
| 60 | /* error categories */ |
| 61 | ATA_ECAT_NONE = 0, |
| 62 | ATA_ECAT_ATA_BUS = 1, |
| 63 | ATA_ECAT_TOUT_HSM = 2, |
| 64 | ATA_ECAT_UNK_DEV = 3, |
Tejun Heo | 75f9caf | 2008-01-03 01:21:14 +0900 | [diff] [blame] | 65 | ATA_ECAT_DUBIOUS_NONE = 4, |
| 66 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, |
| 67 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, |
| 68 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, |
| 69 | ATA_ECAT_NR = 8, |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 70 | |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 71 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
| 72 | |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 73 | /* always put at least this amount of time between resets */ |
| 74 | ATA_EH_RESET_COOL_DOWN = 5000, |
| 75 | |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 76 | /* Waiting in ->prereset can never be reliable. It's |
| 77 | * sometimes nice to wait there but it can't be depended upon; |
| 78 | * otherwise, we wouldn't be resetting. Just give it enough |
| 79 | * time for most drives to spin up. |
| 80 | */ |
| 81 | ATA_EH_PRERESET_TIMEOUT = 10000, |
| 82 | ATA_EH_FASTDRAIN_INTERVAL = 3000, |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 83 | |
| 84 | ATA_EH_UA_TRIES = 5, |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 85 | |
| 86 | /* probe speed down parameters, see ata_eh_schedule_probe() */ |
| 87 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ |
| 88 | ATA_EH_PROBE_TRIALS = 2, |
Tejun Heo | 31daabd | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 89 | }; |
| 90 | |
| 91 | /* The following table determines how we sequence resets. Each entry |
| 92 | * represents timeout for that try. The first try can be soft or |
| 93 | * hardreset. All others are hardreset if available. In most cases |
| 94 | * the first reset w/ 10sec timeout should succeed. Following entries |
| 95 | * are mostly for error handling, hotplug and retarded devices. |
| 96 | */ |
| 97 | static const unsigned long ata_eh_reset_timeouts[] = { |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 98 | 10000, /* most drives spin up by 10sec */ |
| 99 | 10000, /* > 99% working drives spin up before 20sec */ |
| 100 | 35000, /* give > 30 secs of idleness for retarded devices */ |
| 101 | 5000, /* and sweet one last chance */ |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 102 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
Tejun Heo | 31daabd | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 103 | }; |
| 104 | |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 105 | static const unsigned long ata_eh_identify_timeouts[] = { |
| 106 | 5000, /* covers > 99% of successes and not too boring on failures */ |
| 107 | 10000, /* combined time till here is enough even for media access */ |
| 108 | 30000, /* for true idiots */ |
| 109 | ULONG_MAX, |
| 110 | }; |
| 111 | |
| 112 | static const unsigned long ata_eh_other_timeouts[] = { |
| 113 | 5000, /* same rationale as identify timeout */ |
| 114 | 10000, /* ditto */ |
| 115 | /* but no merciful 30sec for other commands, it just isn't worth it */ |
| 116 | ULONG_MAX, |
| 117 | }; |
| 118 | |
| 119 | struct ata_eh_cmd_timeout_ent { |
| 120 | const u8 *commands; |
| 121 | const unsigned long *timeouts; |
| 122 | }; |
| 123 | |
| 124 | /* The following table determines timeouts to use for EH internal |
| 125 | * commands. Each table entry is a command class and matches the |
| 126 | * commands the entry applies to and the timeout table to use. |
| 127 | * |
| 128 | * On the retry after a command timed out, the next timeout value from |
| 129 | * the table is used. If the table doesn't contain further entries, |
| 130 | * the last value is used. |
| 131 | * |
| 132 | * ehc->cmd_timeout_idx keeps track of which timeout to use per |
| 133 | * command class, so if SET_FEATURES times out on the first try, the |
| 134 | * next try will use the second timeout value only for that class. |
| 135 | */ |
| 136 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } |
| 137 | static const struct ata_eh_cmd_timeout_ent |
| 138 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { |
| 139 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), |
| 140 | .timeouts = ata_eh_identify_timeouts, }, |
| 141 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), |
| 142 | .timeouts = ata_eh_other_timeouts, }, |
| 143 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), |
| 144 | .timeouts = ata_eh_other_timeouts, }, |
| 145 | { .commands = CMDS(ATA_CMD_SET_FEATURES), |
| 146 | .timeouts = ata_eh_other_timeouts, }, |
| 147 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), |
| 148 | .timeouts = ata_eh_other_timeouts, }, |
| 149 | }; |
| 150 | #undef CMDS |
| 151 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 152 | static void __ata_port_freeze(struct ata_port *ap); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 153 | #ifdef CONFIG_PM |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 154 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
| 155 | static void ata_eh_handle_port_resume(struct ata_port *ap); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 156 | #else /* CONFIG_PM */ |
| 157 | static void ata_eh_handle_port_suspend(struct ata_port *ap) |
| 158 | { } |
| 159 | |
| 160 | static void ata_eh_handle_port_resume(struct ata_port *ap) |
| 161 | { } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 162 | #endif /* CONFIG_PM */ |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 163 | |
Tejun Heo | b64bbc3 | 2007-07-16 14:29:39 +0900 | [diff] [blame] | 164 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
| 165 | va_list args) |
| 166 | { |
| 167 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, |
| 168 | ATA_EH_DESC_LEN - ehi->desc_len, |
| 169 | fmt, args); |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * __ata_ehi_push_desc - push error description without adding separator |
| 174 | * @ehi: target EHI |
| 175 | * @fmt: printf format string |
| 176 | * |
| 177 | * Format string according to @fmt and append it to @ehi->desc. |
| 178 | * |
| 179 | * LOCKING: |
| 180 | * spin_lock_irqsave(host lock) |
| 181 | */ |
| 182 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) |
| 183 | { |
| 184 | va_list args; |
| 185 | |
| 186 | va_start(args, fmt); |
| 187 | __ata_ehi_pushv_desc(ehi, fmt, args); |
| 188 | va_end(args); |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * ata_ehi_push_desc - push error description with separator |
| 193 | * @ehi: target EHI |
| 194 | * @fmt: printf format string |
| 195 | * |
| 196 | * Format string according to @fmt and append it to @ehi->desc. |
| 197 | * If @ehi->desc is not empty, ", " is added in-between. |
| 198 | * |
| 199 | * LOCKING: |
| 200 | * spin_lock_irqsave(host lock) |
| 201 | */ |
| 202 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) |
| 203 | { |
| 204 | va_list args; |
| 205 | |
| 206 | if (ehi->desc_len) |
| 207 | __ata_ehi_push_desc(ehi, ", "); |
| 208 | |
| 209 | va_start(args, fmt); |
| 210 | __ata_ehi_pushv_desc(ehi, fmt, args); |
| 211 | va_end(args); |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * ata_ehi_clear_desc - clean error description |
| 216 | * @ehi: target EHI |
| 217 | * |
| 218 | * Clear @ehi->desc. |
| 219 | * |
| 220 | * LOCKING: |
| 221 | * spin_lock_irqsave(host lock) |
| 222 | */ |
| 223 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) |
| 224 | { |
| 225 | ehi->desc[0] = '\0'; |
| 226 | ehi->desc_len = 0; |
| 227 | } |
| 228 | |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 229 | /** |
| 230 | * ata_port_desc - append port description |
| 231 | * @ap: target ATA port |
| 232 | * @fmt: printf format string |
| 233 | * |
| 234 | * Format string according to @fmt and append it to port |
| 235 | * description. If port description is not empty, " " is added |
| 236 | * in-between. This function is to be used while initializing |
| 237 | * ata_host. The description is printed on host registration. |
| 238 | * |
| 239 | * LOCKING: |
| 240 | * None. |
| 241 | */ |
| 242 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) |
| 243 | { |
| 244 | va_list args; |
| 245 | |
| 246 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); |
| 247 | |
| 248 | if (ap->link.eh_info.desc_len) |
| 249 | __ata_ehi_push_desc(&ap->link.eh_info, " "); |
| 250 | |
| 251 | va_start(args, fmt); |
| 252 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); |
| 253 | va_end(args); |
| 254 | } |
| 255 | |
| 256 | #ifdef CONFIG_PCI |
| 257 | |
| 258 | /** |
| 259 | * ata_port_pbar_desc - append PCI BAR description |
| 260 | * @ap: target ATA port |
| 261 | * @bar: target PCI BAR |
| 262 | * @offset: offset into PCI BAR |
| 263 | * @name: name of the area |
| 264 | * |
| 265 | * If @offset is negative, this function formats a string which |
| 266 | * contains the name, address, size and type of the BAR and |
| 267 | * appends it to the port description. If @offset is zero or |
| 268 | * positive, only name and offsetted address is appended. |
| 269 | * |
| 270 | * LOCKING: |
| 271 | * None. |
| 272 | */ |
| 273 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, |
| 274 | const char *name) |
| 275 | { |
| 276 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
| 277 | char *type = ""; |
| 278 | unsigned long long start, len; |
| 279 | |
| 280 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) |
| 281 | type = "m"; |
| 282 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) |
| 283 | type = "i"; |
| 284 | |
| 285 | start = (unsigned long long)pci_resource_start(pdev, bar); |
| 286 | len = (unsigned long long)pci_resource_len(pdev, bar); |
| 287 | |
| 288 | if (offset < 0) |
| 289 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); |
| 290 | else |
Andrew Morton | e6a73ab | 2007-12-13 16:01:37 -0800 | [diff] [blame] | 291 | ata_port_desc(ap, "%s 0x%llx", name, |
| 292 | start + (unsigned long long)offset); |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | #endif /* CONFIG_PCI */ |
| 296 | |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 297 | static int ata_lookup_timeout_table(u8 cmd) |
| 298 | { |
| 299 | int i; |
| 300 | |
| 301 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { |
| 302 | const u8 *cur; |
| 303 | |
| 304 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) |
| 305 | if (*cur == cmd) |
| 306 | return i; |
| 307 | } |
| 308 | |
| 309 | return -1; |
| 310 | } |
| 311 | |
| 312 | /** |
| 313 | * ata_internal_cmd_timeout - determine timeout for an internal command |
| 314 | * @dev: target device |
| 315 | * @cmd: internal command to be issued |
| 316 | * |
| 317 | * Determine timeout for internal command @cmd for @dev. |
| 318 | * |
| 319 | * LOCKING: |
| 320 | * EH context. |
| 321 | * |
| 322 | * RETURNS: |
| 323 | * Determined timeout. |
| 324 | */ |
| 325 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) |
| 326 | { |
| 327 | struct ata_eh_context *ehc = &dev->link->eh_context; |
| 328 | int ent = ata_lookup_timeout_table(cmd); |
| 329 | int idx; |
| 330 | |
| 331 | if (ent < 0) |
| 332 | return ATA_EH_CMD_DFL_TIMEOUT; |
| 333 | |
| 334 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; |
| 335 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; |
| 336 | } |
| 337 | |
| 338 | /** |
| 339 | * ata_internal_cmd_timed_out - notification for internal command timeout |
| 340 | * @dev: target device |
| 341 | * @cmd: internal command which timed out |
| 342 | * |
| 343 | * Notify EH that internal command @cmd for @dev timed out. This |
| 344 | * function should be called only for commands whose timeouts are |
| 345 | * determined using ata_internal_cmd_timeout(). |
| 346 | * |
| 347 | * LOCKING: |
| 348 | * EH context. |
| 349 | */ |
| 350 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) |
| 351 | { |
| 352 | struct ata_eh_context *ehc = &dev->link->eh_context; |
| 353 | int ent = ata_lookup_timeout_table(cmd); |
| 354 | int idx; |
| 355 | |
| 356 | if (ent < 0) |
| 357 | return; |
| 358 | |
| 359 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; |
| 360 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) |
| 361 | ehc->cmd_timeout_idx[dev->devno][ent]++; |
| 362 | } |
| 363 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 364 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
Tejun Heo | 0c247c5 | 2006-05-15 20:58:19 +0900 | [diff] [blame] | 365 | unsigned int err_mask) |
| 366 | { |
| 367 | struct ata_ering_entry *ent; |
| 368 | |
| 369 | WARN_ON(!err_mask); |
| 370 | |
| 371 | ering->cursor++; |
| 372 | ering->cursor %= ATA_ERING_SIZE; |
| 373 | |
| 374 | ent = &ering->ring[ering->cursor]; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 375 | ent->eflags = eflags; |
Tejun Heo | 0c247c5 | 2006-05-15 20:58:19 +0900 | [diff] [blame] | 376 | ent->err_mask = err_mask; |
| 377 | ent->timestamp = get_jiffies_64(); |
| 378 | } |
| 379 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 380 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
| 381 | { |
| 382 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; |
| 383 | |
| 384 | if (ent->err_mask) |
| 385 | return ent; |
| 386 | return NULL; |
| 387 | } |
| 388 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 389 | static void ata_ering_clear(struct ata_ering *ering) |
Tejun Heo | 0c247c5 | 2006-05-15 20:58:19 +0900 | [diff] [blame] | 390 | { |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 391 | memset(ering, 0, sizeof(*ering)); |
Tejun Heo | 0c247c5 | 2006-05-15 20:58:19 +0900 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | static int ata_ering_map(struct ata_ering *ering, |
| 395 | int (*map_fn)(struct ata_ering_entry *, void *), |
| 396 | void *arg) |
| 397 | { |
| 398 | int idx, rc = 0; |
| 399 | struct ata_ering_entry *ent; |
| 400 | |
| 401 | idx = ering->cursor; |
| 402 | do { |
| 403 | ent = &ering->ring[idx]; |
| 404 | if (!ent->err_mask) |
| 405 | break; |
| 406 | rc = map_fn(ent, arg); |
| 407 | if (rc) |
| 408 | break; |
| 409 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; |
| 410 | } while (idx != ering->cursor); |
| 411 | |
| 412 | return rc; |
| 413 | } |
| 414 | |
Tejun Heo | 64f65ca | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 415 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
| 416 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 417 | struct ata_eh_context *ehc = &dev->link->eh_context; |
Tejun Heo | 64f65ca | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 418 | |
| 419 | return ehc->i.action | ehc->i.dev_action[dev->devno]; |
| 420 | } |
| 421 | |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 422 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
Tejun Heo | af181c2 | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 423 | struct ata_eh_info *ehi, unsigned int action) |
| 424 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 425 | struct ata_device *tdev; |
Tejun Heo | af181c2 | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 426 | |
| 427 | if (!dev) { |
| 428 | ehi->action &= ~action; |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 429 | ata_for_each_dev(tdev, link, ALL) |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 430 | ehi->dev_action[tdev->devno] &= ~action; |
Tejun Heo | af181c2 | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 431 | } else { |
| 432 | /* doesn't make sense for port-wide EH actions */ |
| 433 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); |
| 434 | |
| 435 | /* break ehi->action into ehi->dev_action */ |
| 436 | if (ehi->action & action) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 437 | ata_for_each_dev(tdev, link, ALL) |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 438 | ehi->dev_action[tdev->devno] |= |
| 439 | ehi->action & action; |
Tejun Heo | af181c2 | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 440 | ehi->action &= ~action; |
| 441 | } |
| 442 | |
| 443 | /* turn off the specified per-dev action */ |
| 444 | ehi->dev_action[dev->devno] &= ~action; |
| 445 | } |
| 446 | } |
| 447 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 448 | /** |
| 449 | * ata_scsi_timed_out - SCSI layer time out callback |
| 450 | * @cmd: timed out SCSI command |
| 451 | * |
| 452 | * Handles SCSI layer timeout. We race with normal completion of |
| 453 | * the qc for @cmd. If the qc is already gone, we lose and let |
| 454 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has |
| 455 | * timed out and EH should be invoked. Prevent ata_qc_complete() |
| 456 | * from finishing it by setting EH_SCHEDULED and return |
| 457 | * EH_NOT_HANDLED. |
| 458 | * |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 459 | * TODO: kill this function once old EH is gone. |
| 460 | * |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 461 | * LOCKING: |
| 462 | * Called from timer context |
| 463 | * |
| 464 | * RETURNS: |
| 465 | * EH_HANDLED or EH_NOT_HANDLED |
| 466 | */ |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 467 | enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 468 | { |
| 469 | struct Scsi_Host *host = cmd->device->host; |
Jeff Garzik | 35bb94b | 2006-04-11 13:12:34 -0400 | [diff] [blame] | 470 | struct ata_port *ap = ata_shost_to_port(host); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 471 | unsigned long flags; |
| 472 | struct ata_queued_cmd *qc; |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 473 | enum blk_eh_timer_return ret; |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 474 | |
| 475 | DPRINTK("ENTER\n"); |
| 476 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 477 | if (ap->ops->error_handler) { |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 478 | ret = BLK_EH_NOT_HANDLED; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 479 | goto out; |
| 480 | } |
| 481 | |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 482 | ret = BLK_EH_HANDLED; |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 483 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 484 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 485 | if (qc) { |
| 486 | WARN_ON(qc->scsicmd != cmd); |
| 487 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; |
| 488 | qc->err_mask |= AC_ERR_TIMEOUT; |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 489 | ret = BLK_EH_NOT_HANDLED; |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 490 | } |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 491 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 492 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 493 | out: |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 494 | DPRINTK("EXIT, ret=%d\n", ret); |
| 495 | return ret; |
| 496 | } |
| 497 | |
Tejun Heo | ece180d | 2008-11-03 20:04:37 +0900 | [diff] [blame] | 498 | static void ata_eh_unload(struct ata_port *ap) |
| 499 | { |
| 500 | struct ata_link *link; |
| 501 | struct ata_device *dev; |
| 502 | unsigned long flags; |
| 503 | |
| 504 | /* Restore SControl IPM and SPD for the next driver and |
| 505 | * disable attached devices. |
| 506 | */ |
| 507 | ata_for_each_link(link, ap, PMP_FIRST) { |
| 508 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); |
| 509 | ata_for_each_dev(dev, link, ALL) |
| 510 | ata_dev_disable(dev); |
| 511 | } |
| 512 | |
| 513 | /* freeze and set UNLOADED */ |
| 514 | spin_lock_irqsave(ap->lock, flags); |
| 515 | |
| 516 | ata_port_freeze(ap); /* won't be thawed */ |
| 517 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ |
| 518 | ap->pflags |= ATA_PFLAG_UNLOADED; |
| 519 | |
| 520 | spin_unlock_irqrestore(ap->lock, flags); |
| 521 | } |
| 522 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 523 | /** |
| 524 | * ata_scsi_error - SCSI layer error handler callback |
| 525 | * @host: SCSI host on which error occurred |
| 526 | * |
| 527 | * Handles SCSI-layer-thrown error events. |
| 528 | * |
| 529 | * LOCKING: |
| 530 | * Inherited from SCSI layer (none, can sleep) |
| 531 | * |
| 532 | * RETURNS: |
| 533 | * Zero. |
| 534 | */ |
Jeff Garzik | 381544b | 2006-04-11 13:04:39 -0400 | [diff] [blame] | 535 | void ata_scsi_error(struct Scsi_Host *host) |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 536 | { |
Jeff Garzik | 35bb94b | 2006-04-11 13:12:34 -0400 | [diff] [blame] | 537 | struct ata_port *ap = ata_shost_to_port(host); |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 538 | int i; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 539 | unsigned long flags; |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 540 | |
| 541 | DPRINTK("ENTER\n"); |
| 542 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 543 | /* synchronize with port task */ |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 544 | ata_port_flush_task(ap); |
| 545 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 546 | /* synchronize with host lock and sort out timeouts */ |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 547 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 548 | /* For new EH, all qcs are finished in one of three ways - |
| 549 | * normal completion, error completion, and SCSI timeout. |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 550 | * Both completions can race against SCSI timeout. When normal |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 551 | * completion wins, the qc never reaches EH. When error |
| 552 | * completion wins, the qc has ATA_QCFLAG_FAILED set. |
| 553 | * |
| 554 | * When SCSI timeout wins, things are a bit more complex. |
| 555 | * Normal or error completion can occur after the timeout but |
| 556 | * before this point. In such cases, both types of |
| 557 | * completions are honored. A scmd is determined to have |
| 558 | * timed out iff its associated qc is active and not failed. |
| 559 | */ |
| 560 | if (ap->ops->error_handler) { |
| 561 | struct scsi_cmnd *scmd, *tmp; |
| 562 | int nr_timedout = 0; |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 563 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 564 | spin_lock_irqsave(ap->lock, flags); |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 565 | |
| 566 | /* This must occur under the ap->lock as we don't want |
| 567 | a polled recovery to race the real interrupt handler |
| 568 | |
| 569 | The lost_interrupt handler checks for any completed but |
| 570 | non-notified command and completes much like an IRQ handler. |
| 571 | |
| 572 | We then fall into the error recovery code which will treat |
| 573 | this as if normal completion won the race */ |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 574 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 575 | if (ap->ops->lost_interrupt) |
| 576 | ap->ops->lost_interrupt(ap); |
| 577 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 578 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { |
| 579 | struct ata_queued_cmd *qc; |
| 580 | |
| 581 | for (i = 0; i < ATA_MAX_QUEUE; i++) { |
| 582 | qc = __ata_qc_from_tag(ap, i); |
| 583 | if (qc->flags & ATA_QCFLAG_ACTIVE && |
| 584 | qc->scsicmd == scmd) |
| 585 | break; |
| 586 | } |
| 587 | |
| 588 | if (i < ATA_MAX_QUEUE) { |
| 589 | /* the scmd has an associated qc */ |
| 590 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { |
| 591 | /* which hasn't failed yet, timeout */ |
| 592 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 593 | qc->flags |= ATA_QCFLAG_FAILED; |
| 594 | nr_timedout++; |
| 595 | } |
| 596 | } else { |
| 597 | /* Normal completion occurred after |
| 598 | * SCSI timeout but before this point. |
| 599 | * Successfully complete it. |
| 600 | */ |
| 601 | scmd->retries = scmd->allowed; |
| 602 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | /* If we have timed out qcs. They belong to EH from |
| 607 | * this point but the state of the controller is |
| 608 | * unknown. Freeze the port to make sure the IRQ |
| 609 | * handler doesn't diddle with those qcs. This must |
| 610 | * be done atomically w.r.t. setting QCFLAG_FAILED. |
| 611 | */ |
| 612 | if (nr_timedout) |
| 613 | __ata_port_freeze(ap); |
| 614 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 615 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 616 | |
| 617 | /* initialize eh_tries */ |
| 618 | ap->eh_tries = ATA_EH_MAX_TRIES; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 619 | } else |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 620 | spin_unlock_wait(ap->lock); |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 621 | |
| 622 | /* If we timed raced normal completion and there is nothing to |
| 623 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 624 | |
| 625 | repeat: |
| 626 | /* invoke error handler */ |
| 627 | if (ap->ops->error_handler) { |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 628 | struct ata_link *link; |
| 629 | |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 630 | /* kill fast drain timer */ |
| 631 | del_timer_sync(&ap->fastdrain_timer); |
| 632 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 633 | /* process port resume request */ |
| 634 | ata_eh_handle_port_resume(ap); |
| 635 | |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 636 | /* fetch & clear EH info */ |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 637 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 638 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 639 | ata_for_each_link(link, ap, HOST_FIRST) { |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 640 | struct ata_eh_context *ehc = &link->eh_context; |
| 641 | struct ata_device *dev; |
| 642 | |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 643 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
| 644 | link->eh_context.i = link->eh_info; |
| 645 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 646 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 647 | ata_for_each_dev(dev, link, ENABLED) { |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 648 | int devno = dev->devno; |
| 649 | |
| 650 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; |
| 651 | if (ata_ncq_enabled(dev)) |
| 652 | ehc->saved_ncq_enabled |= 1 << devno; |
| 653 | } |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 654 | } |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 655 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 656 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
| 657 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 658 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 659 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 660 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 661 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 662 | /* invoke EH, skip if unloading or suspended */ |
| 663 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 664 | ap->ops->error_handler(ap); |
Tejun Heo | ece180d | 2008-11-03 20:04:37 +0900 | [diff] [blame] | 665 | else { |
| 666 | /* if unloading, commence suicide */ |
| 667 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && |
| 668 | !(ap->pflags & ATA_PFLAG_UNLOADED)) |
| 669 | ata_eh_unload(ap); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 670 | ata_eh_finish(ap); |
Tejun Heo | ece180d | 2008-11-03 20:04:37 +0900 | [diff] [blame] | 671 | } |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 672 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 673 | /* process port suspend request */ |
| 674 | ata_eh_handle_port_suspend(ap); |
| 675 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 676 | /* Exception might have happend after ->error_handler |
| 677 | * recovered the port but before this point. Repeat |
| 678 | * EH in such case. |
| 679 | */ |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 680 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 681 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 682 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 683 | if (--ap->eh_tries) { |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 684 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 685 | goto repeat; |
| 686 | } |
| 687 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 688 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
Tejun Heo | 914616a | 2007-06-25 21:47:11 +0900 | [diff] [blame] | 689 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 690 | } |
| 691 | |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 692 | /* this run is complete, make sure EH info is clear */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 693 | ata_for_each_link(link, ap, HOST_FIRST) |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 694 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 695 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 696 | /* Clear host_eh_scheduled while holding ap->lock such |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 697 | * that if exception occurs after this point but |
| 698 | * before EH completion, SCSI midlayer will |
| 699 | * re-initiate EH. |
| 700 | */ |
| 701 | host->host_eh_scheduled = 0; |
| 702 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 703 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 704 | } else { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 705 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 706 | ap->ops->eng_timeout(ap); |
| 707 | } |
| 708 | |
| 709 | /* finish or retry handled scmd's and clean up */ |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 710 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
| 711 | |
| 712 | scsi_eh_flush_done_q(&ap->eh_done_q); |
| 713 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 714 | /* clean up */ |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 715 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 716 | |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 717 | if (ap->pflags & ATA_PFLAG_LOADING) |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 718 | ap->pflags &= ~ATA_PFLAG_LOADING; |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 719 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
David Howells | 52bad64 | 2006-11-22 14:54:01 +0000 | [diff] [blame] | 720 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, 0); |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 721 | |
| 722 | if (ap->pflags & ATA_PFLAG_RECOVERED) |
| 723 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); |
Tejun Heo | 580b210 | 2006-05-31 18:28:05 +0900 | [diff] [blame] | 724 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 725 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 726 | |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 727 | /* tell wait_eh that we're done */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 728 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 729 | wake_up_all(&ap->eh_wait_q); |
| 730 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 731 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 732 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 733 | DPRINTK("EXIT\n"); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 734 | } |
| 735 | |
| 736 | /** |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 737 | * ata_port_wait_eh - Wait for the currently pending EH to complete |
| 738 | * @ap: Port to wait EH for |
| 739 | * |
| 740 | * Wait until the currently pending EH is complete. |
| 741 | * |
| 742 | * LOCKING: |
| 743 | * Kernel thread context (may sleep). |
| 744 | */ |
| 745 | void ata_port_wait_eh(struct ata_port *ap) |
| 746 | { |
| 747 | unsigned long flags; |
| 748 | DEFINE_WAIT(wait); |
| 749 | |
| 750 | retry: |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 751 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 752 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 753 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 754 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 755 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 756 | schedule(); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 757 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 758 | } |
Tejun Heo | 0a1b622 | 2006-06-11 11:01:38 +0900 | [diff] [blame] | 759 | finish_wait(&ap->eh_wait_q, &wait); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 760 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 761 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 762 | |
| 763 | /* make sure SCSI EH is complete */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 764 | if (scsi_host_in_recovery(ap->scsi_host)) { |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 765 | msleep(10); |
| 766 | goto retry; |
| 767 | } |
| 768 | } |
| 769 | |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 770 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
| 771 | { |
| 772 | unsigned int tag; |
| 773 | int nr = 0; |
| 774 | |
| 775 | /* count only non-internal commands */ |
| 776 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) |
| 777 | if (ata_qc_from_tag(ap, tag)) |
| 778 | nr++; |
| 779 | |
| 780 | return nr; |
| 781 | } |
| 782 | |
| 783 | void ata_eh_fastdrain_timerfn(unsigned long arg) |
| 784 | { |
| 785 | struct ata_port *ap = (void *)arg; |
| 786 | unsigned long flags; |
| 787 | int cnt; |
| 788 | |
| 789 | spin_lock_irqsave(ap->lock, flags); |
| 790 | |
| 791 | cnt = ata_eh_nr_in_flight(ap); |
| 792 | |
| 793 | /* are we done? */ |
| 794 | if (!cnt) |
| 795 | goto out_unlock; |
| 796 | |
| 797 | if (cnt == ap->fastdrain_cnt) { |
| 798 | unsigned int tag; |
| 799 | |
| 800 | /* No progress during the last interval, tag all |
| 801 | * in-flight qcs as timed out and freeze the port. |
| 802 | */ |
| 803 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { |
| 804 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); |
| 805 | if (qc) |
| 806 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 807 | } |
| 808 | |
| 809 | ata_port_freeze(ap); |
| 810 | } else { |
| 811 | /* some qcs have finished, give it another chance */ |
| 812 | ap->fastdrain_cnt = cnt; |
| 813 | ap->fastdrain_timer.expires = |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 814 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 815 | add_timer(&ap->fastdrain_timer); |
| 816 | } |
| 817 | |
| 818 | out_unlock: |
| 819 | spin_unlock_irqrestore(ap->lock, flags); |
| 820 | } |
| 821 | |
| 822 | /** |
| 823 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain |
| 824 | * @ap: target ATA port |
| 825 | * @fastdrain: activate fast drain |
| 826 | * |
| 827 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain |
| 828 | * is non-zero and EH wasn't pending before. Fast drain ensures |
| 829 | * that EH kicks in in timely manner. |
| 830 | * |
| 831 | * LOCKING: |
| 832 | * spin_lock_irqsave(host lock) |
| 833 | */ |
| 834 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) |
| 835 | { |
| 836 | int cnt; |
| 837 | |
| 838 | /* already scheduled? */ |
| 839 | if (ap->pflags & ATA_PFLAG_EH_PENDING) |
| 840 | return; |
| 841 | |
| 842 | ap->pflags |= ATA_PFLAG_EH_PENDING; |
| 843 | |
| 844 | if (!fastdrain) |
| 845 | return; |
| 846 | |
| 847 | /* do we have in-flight qcs? */ |
| 848 | cnt = ata_eh_nr_in_flight(ap); |
| 849 | if (!cnt) |
| 850 | return; |
| 851 | |
| 852 | /* activate fast drain */ |
| 853 | ap->fastdrain_cnt = cnt; |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 854 | ap->fastdrain_timer.expires = |
| 855 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 856 | add_timer(&ap->fastdrain_timer); |
| 857 | } |
| 858 | |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 859 | /** |
| 860 | * ata_qc_schedule_eh - schedule qc for error handling |
| 861 | * @qc: command to schedule error handling for |
| 862 | * |
| 863 | * Schedule error handling for @qc. EH will kick in as soon as |
| 864 | * other commands are drained. |
| 865 | * |
| 866 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 867 | * spin_lock_irqsave(host lock) |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 868 | */ |
| 869 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) |
| 870 | { |
| 871 | struct ata_port *ap = qc->ap; |
| 872 | |
| 873 | WARN_ON(!ap->ops->error_handler); |
| 874 | |
| 875 | qc->flags |= ATA_QCFLAG_FAILED; |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 876 | ata_eh_set_pending(ap, 1); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 877 | |
| 878 | /* The following will fail if timeout has already expired. |
| 879 | * ata_scsi_error() takes care of such scmds on EH entry. |
| 880 | * Note that ATA_QCFLAG_FAILED is unconditionally set after |
| 881 | * this function completes. |
| 882 | */ |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 883 | blk_abort_request(qc->scsicmd->request); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 884 | } |
| 885 | |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 886 | /** |
| 887 | * ata_port_schedule_eh - schedule error handling without a qc |
| 888 | * @ap: ATA port to schedule EH for |
| 889 | * |
| 890 | * Schedule error handling for @ap. EH will kick in as soon as |
| 891 | * all commands are drained. |
| 892 | * |
| 893 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 894 | * spin_lock_irqsave(host lock) |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 895 | */ |
| 896 | void ata_port_schedule_eh(struct ata_port *ap) |
| 897 | { |
| 898 | WARN_ON(!ap->ops->error_handler); |
| 899 | |
Tejun Heo | f4d6d00 | 2007-05-01 11:50:15 +0200 | [diff] [blame] | 900 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
| 901 | return; |
| 902 | |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 903 | ata_eh_set_pending(ap, 1); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 904 | scsi_schedule_eh(ap->scsi_host); |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 905 | |
| 906 | DPRINTK("port EH scheduled\n"); |
| 907 | } |
| 908 | |
Tejun Heo | dbd8261 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 909 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 910 | { |
| 911 | int tag, nr_aborted = 0; |
| 912 | |
| 913 | WARN_ON(!ap->ops->error_handler); |
| 914 | |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 915 | /* we're gonna abort all commands, no need for fast drain */ |
| 916 | ata_eh_set_pending(ap, 0); |
| 917 | |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 918 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 919 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); |
| 920 | |
Tejun Heo | dbd8261 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 921 | if (qc && (!link || qc->dev->link == link)) { |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 922 | qc->flags |= ATA_QCFLAG_FAILED; |
| 923 | ata_qc_complete(qc); |
| 924 | nr_aborted++; |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | if (!nr_aborted) |
| 929 | ata_port_schedule_eh(ap); |
| 930 | |
| 931 | return nr_aborted; |
| 932 | } |
| 933 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 934 | /** |
Tejun Heo | dbd8261 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 935 | * ata_link_abort - abort all qc's on the link |
| 936 | * @link: ATA link to abort qc's for |
| 937 | * |
| 938 | * Abort all active qc's active on @link and schedule EH. |
| 939 | * |
| 940 | * LOCKING: |
| 941 | * spin_lock_irqsave(host lock) |
| 942 | * |
| 943 | * RETURNS: |
| 944 | * Number of aborted qc's. |
| 945 | */ |
| 946 | int ata_link_abort(struct ata_link *link) |
| 947 | { |
| 948 | return ata_do_link_abort(link->ap, link); |
| 949 | } |
| 950 | |
| 951 | /** |
| 952 | * ata_port_abort - abort all qc's on the port |
| 953 | * @ap: ATA port to abort qc's for |
| 954 | * |
| 955 | * Abort all active qc's of @ap and schedule EH. |
| 956 | * |
| 957 | * LOCKING: |
| 958 | * spin_lock_irqsave(host_set lock) |
| 959 | * |
| 960 | * RETURNS: |
| 961 | * Number of aborted qc's. |
| 962 | */ |
| 963 | int ata_port_abort(struct ata_port *ap) |
| 964 | { |
| 965 | return ata_do_link_abort(ap, NULL); |
| 966 | } |
| 967 | |
| 968 | /** |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 969 | * __ata_port_freeze - freeze port |
| 970 | * @ap: ATA port to freeze |
| 971 | * |
| 972 | * This function is called when HSM violation or some other |
| 973 | * condition disrupts normal operation of the port. Frozen port |
| 974 | * is not allowed to perform any operation until the port is |
| 975 | * thawed, which usually follows a successful reset. |
| 976 | * |
| 977 | * ap->ops->freeze() callback can be used for freezing the port |
| 978 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a |
| 979 | * port cannot be frozen hardware-wise, the interrupt handler |
| 980 | * must ack and clear interrupts unconditionally while the port |
| 981 | * is frozen. |
| 982 | * |
| 983 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 984 | * spin_lock_irqsave(host lock) |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 985 | */ |
| 986 | static void __ata_port_freeze(struct ata_port *ap) |
| 987 | { |
| 988 | WARN_ON(!ap->ops->error_handler); |
| 989 | |
| 990 | if (ap->ops->freeze) |
| 991 | ap->ops->freeze(ap); |
| 992 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 993 | ap->pflags |= ATA_PFLAG_FROZEN; |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 994 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 995 | DPRINTK("ata%u port frozen\n", ap->print_id); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 996 | } |
| 997 | |
| 998 | /** |
| 999 | * ata_port_freeze - abort & freeze port |
| 1000 | * @ap: ATA port to freeze |
| 1001 | * |
| 1002 | * Abort and freeze @ap. |
| 1003 | * |
| 1004 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 1005 | * spin_lock_irqsave(host lock) |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1006 | * |
| 1007 | * RETURNS: |
| 1008 | * Number of aborted commands. |
| 1009 | */ |
| 1010 | int ata_port_freeze(struct ata_port *ap) |
| 1011 | { |
| 1012 | int nr_aborted; |
| 1013 | |
| 1014 | WARN_ON(!ap->ops->error_handler); |
| 1015 | |
| 1016 | nr_aborted = ata_port_abort(ap); |
| 1017 | __ata_port_freeze(ap); |
| 1018 | |
| 1019 | return nr_aborted; |
| 1020 | } |
| 1021 | |
| 1022 | /** |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1023 | * sata_async_notification - SATA async notification handler |
| 1024 | * @ap: ATA port where async notification is received |
| 1025 | * |
| 1026 | * Handler to be called when async notification via SDB FIS is |
| 1027 | * received. This function schedules EH if necessary. |
| 1028 | * |
| 1029 | * LOCKING: |
| 1030 | * spin_lock_irqsave(host lock) |
| 1031 | * |
| 1032 | * RETURNS: |
| 1033 | * 1 if EH is scheduled, 0 otherwise. |
| 1034 | */ |
| 1035 | int sata_async_notification(struct ata_port *ap) |
| 1036 | { |
| 1037 | u32 sntf; |
| 1038 | int rc; |
| 1039 | |
| 1040 | if (!(ap->flags & ATA_FLAG_AN)) |
| 1041 | return 0; |
| 1042 | |
| 1043 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); |
| 1044 | if (rc == 0) |
| 1045 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); |
| 1046 | |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 1047 | if (!sata_pmp_attached(ap) || rc) { |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1048 | /* PMP is not attached or SNTF is not available */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 1049 | if (!sata_pmp_attached(ap)) { |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1050 | /* PMP is not attached. Check whether ATAPI |
| 1051 | * AN is configured. If so, notify media |
| 1052 | * change. |
| 1053 | */ |
| 1054 | struct ata_device *dev = ap->link.device; |
| 1055 | |
| 1056 | if ((dev->class == ATA_DEV_ATAPI) && |
| 1057 | (dev->flags & ATA_DFLAG_AN)) |
| 1058 | ata_scsi_media_change_notify(dev); |
| 1059 | return 0; |
| 1060 | } else { |
| 1061 | /* PMP is attached but SNTF is not available. |
| 1062 | * ATAPI async media change notification is |
| 1063 | * not used. The PMP must be reporting PHY |
| 1064 | * status change, schedule EH. |
| 1065 | */ |
| 1066 | ata_port_schedule_eh(ap); |
| 1067 | return 1; |
| 1068 | } |
| 1069 | } else { |
| 1070 | /* PMP is attached and SNTF is available */ |
| 1071 | struct ata_link *link; |
| 1072 | |
| 1073 | /* check and notify ATAPI AN */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 1074 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1075 | if (!(sntf & (1 << link->pmp))) |
| 1076 | continue; |
| 1077 | |
| 1078 | if ((link->device->class == ATA_DEV_ATAPI) && |
| 1079 | (link->device->flags & ATA_DFLAG_AN)) |
| 1080 | ata_scsi_media_change_notify(link->device); |
| 1081 | } |
| 1082 | |
| 1083 | /* If PMP is reporting that PHY status of some |
| 1084 | * downstream ports has changed, schedule EH. |
| 1085 | */ |
| 1086 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { |
| 1087 | ata_port_schedule_eh(ap); |
| 1088 | return 1; |
| 1089 | } |
| 1090 | |
| 1091 | return 0; |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | /** |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1096 | * ata_eh_freeze_port - EH helper to freeze port |
| 1097 | * @ap: ATA port to freeze |
| 1098 | * |
| 1099 | * Freeze @ap. |
| 1100 | * |
| 1101 | * LOCKING: |
| 1102 | * None. |
| 1103 | */ |
| 1104 | void ata_eh_freeze_port(struct ata_port *ap) |
| 1105 | { |
| 1106 | unsigned long flags; |
| 1107 | |
| 1108 | if (!ap->ops->error_handler) |
| 1109 | return; |
| 1110 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1111 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1112 | __ata_port_freeze(ap); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1113 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1114 | } |
| 1115 | |
| 1116 | /** |
| 1117 | * ata_port_thaw_port - EH helper to thaw port |
| 1118 | * @ap: ATA port to thaw |
| 1119 | * |
| 1120 | * Thaw frozen port @ap. |
| 1121 | * |
| 1122 | * LOCKING: |
| 1123 | * None. |
| 1124 | */ |
| 1125 | void ata_eh_thaw_port(struct ata_port *ap) |
| 1126 | { |
| 1127 | unsigned long flags; |
| 1128 | |
| 1129 | if (!ap->ops->error_handler) |
| 1130 | return; |
| 1131 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1132 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1133 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1134 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1135 | |
| 1136 | if (ap->ops->thaw) |
| 1137 | ap->ops->thaw(ap); |
| 1138 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1139 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1140 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1141 | DPRINTK("ata%u port thawed\n", ap->print_id); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1142 | } |
| 1143 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1144 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
| 1145 | { |
| 1146 | /* nada */ |
| 1147 | } |
| 1148 | |
| 1149 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) |
| 1150 | { |
| 1151 | struct ata_port *ap = qc->ap; |
| 1152 | struct scsi_cmnd *scmd = qc->scsicmd; |
| 1153 | unsigned long flags; |
| 1154 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1155 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1156 | qc->scsidone = ata_eh_scsidone; |
| 1157 | __ata_qc_complete(qc); |
| 1158 | WARN_ON(ata_tag_valid(qc->tag)); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1159 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1160 | |
| 1161 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); |
| 1162 | } |
| 1163 | |
| 1164 | /** |
| 1165 | * ata_eh_qc_complete - Complete an active ATA command from EH |
| 1166 | * @qc: Command to complete |
| 1167 | * |
| 1168 | * Indicate to the mid and upper layers that an ATA command has |
| 1169 | * completed. To be used from EH. |
| 1170 | */ |
| 1171 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) |
| 1172 | { |
| 1173 | struct scsi_cmnd *scmd = qc->scsicmd; |
| 1174 | scmd->retries = scmd->allowed; |
| 1175 | __ata_eh_qc_complete(qc); |
| 1176 | } |
| 1177 | |
| 1178 | /** |
| 1179 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH |
| 1180 | * @qc: Command to retry |
| 1181 | * |
| 1182 | * Indicate to the mid and upper layers that an ATA command |
| 1183 | * should be retried. To be used from EH. |
| 1184 | * |
| 1185 | * SCSI midlayer limits the number of retries to scmd->allowed. |
| 1186 | * scmd->retries is decremented for commands which get retried |
| 1187 | * due to unrelated failures (qc->err_mask is zero). |
| 1188 | */ |
| 1189 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) |
| 1190 | { |
| 1191 | struct scsi_cmnd *scmd = qc->scsicmd; |
| 1192 | if (!qc->err_mask && scmd->retries) |
| 1193 | scmd->retries--; |
| 1194 | __ata_eh_qc_complete(qc); |
| 1195 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1196 | |
| 1197 | /** |
Tejun Heo | 678afac | 2009-01-29 20:31:30 +0900 | [diff] [blame] | 1198 | * ata_dev_disable - disable ATA device |
| 1199 | * @dev: ATA device to disable |
| 1200 | * |
| 1201 | * Disable @dev. |
| 1202 | * |
| 1203 | * Locking: |
| 1204 | * EH context. |
| 1205 | */ |
| 1206 | void ata_dev_disable(struct ata_device *dev) |
| 1207 | { |
| 1208 | if (!ata_dev_enabled(dev)) |
| 1209 | return; |
| 1210 | |
| 1211 | if (ata_msg_drv(dev->link->ap)) |
| 1212 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
| 1213 | ata_acpi_on_disable(dev); |
| 1214 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); |
| 1215 | dev->class++; |
Tejun Heo | 99cf610 | 2009-01-29 20:31:32 +0900 | [diff] [blame] | 1216 | |
| 1217 | /* From now till the next successful probe, ering is used to |
| 1218 | * track probe failures. Clear accumulated device error info. |
| 1219 | */ |
| 1220 | ata_ering_clear(&dev->ering); |
Tejun Heo | 678afac | 2009-01-29 20:31:30 +0900 | [diff] [blame] | 1221 | } |
| 1222 | |
| 1223 | /** |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1224 | * ata_eh_detach_dev - detach ATA device |
| 1225 | * @dev: ATA device to detach |
| 1226 | * |
| 1227 | * Detach @dev. |
| 1228 | * |
| 1229 | * LOCKING: |
| 1230 | * None. |
| 1231 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1232 | void ata_eh_detach_dev(struct ata_device *dev) |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1233 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1234 | struct ata_link *link = dev->link; |
| 1235 | struct ata_port *ap = link->ap; |
Tejun Heo | 90484eb | 2008-10-26 15:43:03 +0900 | [diff] [blame] | 1236 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1237 | unsigned long flags; |
| 1238 | |
| 1239 | ata_dev_disable(dev); |
| 1240 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1241 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1242 | |
| 1243 | dev->flags &= ~ATA_DFLAG_DETACH; |
| 1244 | |
| 1245 | if (ata_scsi_offline_dev(dev)) { |
| 1246 | dev->flags |= ATA_DFLAG_DETACHED; |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1247 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1248 | } |
| 1249 | |
Tejun Heo | 90484eb | 2008-10-26 15:43:03 +0900 | [diff] [blame] | 1250 | /* clear per-dev EH info */ |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1251 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
| 1252 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); |
Tejun Heo | 90484eb | 2008-10-26 15:43:03 +0900 | [diff] [blame] | 1253 | ehc->saved_xfer_mode[dev->devno] = 0; |
| 1254 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); |
Tejun Heo | beb07c1 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1255 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1256 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1257 | } |
| 1258 | |
| 1259 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1260 | * ata_eh_about_to_do - about to perform eh_action |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1261 | * @link: target ATA link |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1262 | * @dev: target ATA dev for per-dev action (can be NULL) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1263 | * @action: action about to be performed |
| 1264 | * |
| 1265 | * Called just before performing EH actions to clear related bits |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1266 | * in @link->eh_info such that eh actions are not unnecessarily |
| 1267 | * repeated. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1268 | * |
| 1269 | * LOCKING: |
| 1270 | * None. |
| 1271 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1272 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
| 1273 | unsigned int action) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1274 | { |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1275 | struct ata_port *ap = link->ap; |
| 1276 | struct ata_eh_info *ehi = &link->eh_info; |
| 1277 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1278 | unsigned long flags; |
| 1279 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1280 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 1281 | |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1282 | ata_eh_clear_action(link, dev, ehi, action); |
Tejun Heo | 13abf50 | 2006-07-10 23:18:46 +0900 | [diff] [blame] | 1283 | |
Tejun Heo | a568d1d | 2008-10-21 20:37:21 +0900 | [diff] [blame] | 1284 | /* About to take EH action, set RECOVERED. Ignore actions on |
| 1285 | * slave links as master will do them again. |
| 1286 | */ |
| 1287 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 1288 | ap->pflags |= ATA_PFLAG_RECOVERED; |
| 1289 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1290 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1291 | } |
| 1292 | |
| 1293 | /** |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1294 | * ata_eh_done - EH action complete |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1295 | * @ap: target ATA port |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1296 | * @dev: target ATA dev for per-dev action (can be NULL) |
| 1297 | * @action: action just completed |
| 1298 | * |
| 1299 | * Called right after performing EH actions to clear related bits |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1300 | * in @link->eh_context. |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1301 | * |
| 1302 | * LOCKING: |
| 1303 | * None. |
| 1304 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1305 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
| 1306 | unsigned int action) |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1307 | { |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1308 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1309 | |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1310 | ata_eh_clear_action(link, dev, &ehc->i, action); |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1311 | } |
| 1312 | |
| 1313 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1314 | * ata_err_string - convert err_mask to descriptive string |
| 1315 | * @err_mask: error mask to convert to string |
| 1316 | * |
| 1317 | * Convert @err_mask to descriptive string. Errors are |
| 1318 | * prioritized according to severity and only the most severe |
| 1319 | * error is reported. |
| 1320 | * |
| 1321 | * LOCKING: |
| 1322 | * None. |
| 1323 | * |
| 1324 | * RETURNS: |
| 1325 | * Descriptive string for @err_mask |
| 1326 | */ |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 1327 | static const char *ata_err_string(unsigned int err_mask) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1328 | { |
| 1329 | if (err_mask & AC_ERR_HOST_BUS) |
| 1330 | return "host bus error"; |
| 1331 | if (err_mask & AC_ERR_ATA_BUS) |
| 1332 | return "ATA bus error"; |
| 1333 | if (err_mask & AC_ERR_TIMEOUT) |
| 1334 | return "timeout"; |
| 1335 | if (err_mask & AC_ERR_HSM) |
| 1336 | return "HSM violation"; |
| 1337 | if (err_mask & AC_ERR_SYSTEM) |
| 1338 | return "internal error"; |
| 1339 | if (err_mask & AC_ERR_MEDIA) |
| 1340 | return "media error"; |
| 1341 | if (err_mask & AC_ERR_INVALID) |
| 1342 | return "invalid argument"; |
| 1343 | if (err_mask & AC_ERR_DEV) |
| 1344 | return "device error"; |
| 1345 | return "unknown error"; |
| 1346 | } |
| 1347 | |
| 1348 | /** |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1349 | * ata_read_log_page - read a specific log page |
| 1350 | * @dev: target device |
| 1351 | * @page: page to read |
| 1352 | * @buf: buffer to store read page |
| 1353 | * @sectors: number of sectors to read |
| 1354 | * |
| 1355 | * Read log page using READ_LOG_EXT command. |
| 1356 | * |
| 1357 | * LOCKING: |
| 1358 | * Kernel thread context (may sleep). |
| 1359 | * |
| 1360 | * RETURNS: |
| 1361 | * 0 on success, AC_ERR_* mask otherwise. |
| 1362 | */ |
| 1363 | static unsigned int ata_read_log_page(struct ata_device *dev, |
| 1364 | u8 page, void *buf, unsigned int sectors) |
| 1365 | { |
| 1366 | struct ata_taskfile tf; |
| 1367 | unsigned int err_mask; |
| 1368 | |
| 1369 | DPRINTK("read log page - page %d\n", page); |
| 1370 | |
| 1371 | ata_tf_init(dev, &tf); |
| 1372 | tf.command = ATA_CMD_READ_LOG_EXT; |
| 1373 | tf.lbal = page; |
| 1374 | tf.nsect = sectors; |
| 1375 | tf.hob_nsect = sectors >> 8; |
| 1376 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; |
| 1377 | tf.protocol = ATA_PROT_PIO; |
| 1378 | |
| 1379 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1380 | buf, sectors * ATA_SECT_SIZE, 0); |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1381 | |
| 1382 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| 1383 | return err_mask; |
| 1384 | } |
| 1385 | |
| 1386 | /** |
| 1387 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details |
| 1388 | * @dev: Device to read log page 10h from |
| 1389 | * @tag: Resulting tag of the failed command |
| 1390 | * @tf: Resulting taskfile registers of the failed command |
| 1391 | * |
| 1392 | * Read log page 10h to obtain NCQ error details and clear error |
| 1393 | * condition. |
| 1394 | * |
| 1395 | * LOCKING: |
| 1396 | * Kernel thread context (may sleep). |
| 1397 | * |
| 1398 | * RETURNS: |
| 1399 | * 0 on success, -errno otherwise. |
| 1400 | */ |
| 1401 | static int ata_eh_read_log_10h(struct ata_device *dev, |
| 1402 | int *tag, struct ata_taskfile *tf) |
| 1403 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1404 | u8 *buf = dev->link->ap->sector_buf; |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1405 | unsigned int err_mask; |
| 1406 | u8 csum; |
| 1407 | int i; |
| 1408 | |
| 1409 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); |
| 1410 | if (err_mask) |
| 1411 | return -EIO; |
| 1412 | |
| 1413 | csum = 0; |
| 1414 | for (i = 0; i < ATA_SECT_SIZE; i++) |
| 1415 | csum += buf[i]; |
| 1416 | if (csum) |
| 1417 | ata_dev_printk(dev, KERN_WARNING, |
| 1418 | "invalid checksum 0x%x on log page 10h\n", csum); |
| 1419 | |
| 1420 | if (buf[0] & 0x80) |
| 1421 | return -ENOENT; |
| 1422 | |
| 1423 | *tag = buf[0] & 0x1f; |
| 1424 | |
| 1425 | tf->command = buf[2]; |
| 1426 | tf->feature = buf[3]; |
| 1427 | tf->lbal = buf[4]; |
| 1428 | tf->lbam = buf[5]; |
| 1429 | tf->lbah = buf[6]; |
| 1430 | tf->device = buf[7]; |
| 1431 | tf->hob_lbal = buf[8]; |
| 1432 | tf->hob_lbam = buf[9]; |
| 1433 | tf->hob_lbah = buf[10]; |
| 1434 | tf->nsect = buf[12]; |
| 1435 | tf->hob_nsect = buf[13]; |
| 1436 | |
| 1437 | return 0; |
| 1438 | } |
| 1439 | |
| 1440 | /** |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 1441 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY |
| 1442 | * @dev: target ATAPI device |
| 1443 | * @r_sense_key: out parameter for sense_key |
| 1444 | * |
| 1445 | * Perform ATAPI TEST_UNIT_READY. |
| 1446 | * |
| 1447 | * LOCKING: |
| 1448 | * EH context (may sleep). |
| 1449 | * |
| 1450 | * RETURNS: |
| 1451 | * 0 on success, AC_ERR_* mask on failure. |
| 1452 | */ |
| 1453 | static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) |
| 1454 | { |
| 1455 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; |
| 1456 | struct ata_taskfile tf; |
| 1457 | unsigned int err_mask; |
| 1458 | |
| 1459 | ata_tf_init(dev, &tf); |
| 1460 | |
| 1461 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1462 | tf.command = ATA_CMD_PACKET; |
| 1463 | tf.protocol = ATAPI_PROT_NODATA; |
| 1464 | |
| 1465 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); |
| 1466 | if (err_mask == AC_ERR_DEV) |
| 1467 | *r_sense_key = tf.feature >> 4; |
| 1468 | return err_mask; |
| 1469 | } |
| 1470 | |
| 1471 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1472 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE |
| 1473 | * @dev: device to perform REQUEST_SENSE to |
| 1474 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1475 | * @dfl_sense_key: default sense key to use |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1476 | * |
| 1477 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK |
| 1478 | * SENSE. This function is EH helper. |
| 1479 | * |
| 1480 | * LOCKING: |
| 1481 | * Kernel thread context (may sleep). |
| 1482 | * |
| 1483 | * RETURNS: |
| 1484 | * 0 on success, AC_ERR_* mask on failure |
| 1485 | */ |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1486 | static unsigned int atapi_eh_request_sense(struct ata_device *dev, |
| 1487 | u8 *sense_buf, u8 dfl_sense_key) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1488 | { |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1489 | u8 cdb[ATAPI_CDB_LEN] = |
| 1490 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1491 | struct ata_port *ap = dev->link->ap; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1492 | struct ata_taskfile tf; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1493 | |
| 1494 | DPRINTK("ATAPI request sense\n"); |
| 1495 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1496 | /* FIXME: is this needed? */ |
| 1497 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
| 1498 | |
Albert Lee | 5628776 | 2007-04-02 11:30:46 +0800 | [diff] [blame] | 1499 | /* initialize sense_buf with the error register, |
| 1500 | * for the case where they are -not- overwritten |
| 1501 | */ |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1502 | sense_buf[0] = 0x70; |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1503 | sense_buf[2] = dfl_sense_key; |
Albert Lee | 5628776 | 2007-04-02 11:30:46 +0800 | [diff] [blame] | 1504 | |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 1505 | /* some devices time out if garbage left in tf */ |
Albert Lee | 5628776 | 2007-04-02 11:30:46 +0800 | [diff] [blame] | 1506 | ata_tf_init(dev, &tf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1507 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1508 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1509 | tf.command = ATA_CMD_PACKET; |
| 1510 | |
| 1511 | /* is it pointless to prefer PIO for "safety reasons"? */ |
| 1512 | if (ap->flags & ATA_FLAG_PIO_DMA) { |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 1513 | tf.protocol = ATAPI_PROT_DMA; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1514 | tf.feature |= ATAPI_PKT_DMA; |
| 1515 | } else { |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 1516 | tf.protocol = ATAPI_PROT_PIO; |
Tejun Heo | f2dfc1a | 2007-12-12 12:12:46 +0900 | [diff] [blame] | 1517 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
| 1518 | tf.lbah = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1519 | } |
| 1520 | |
| 1521 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1522 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1523 | } |
| 1524 | |
| 1525 | /** |
| 1526 | * ata_eh_analyze_serror - analyze SError for a failed port |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1527 | * @link: ATA link to analyze SError for |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1528 | * |
| 1529 | * Analyze SError if available and further determine cause of |
| 1530 | * failure. |
| 1531 | * |
| 1532 | * LOCKING: |
| 1533 | * None. |
| 1534 | */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1535 | static void ata_eh_analyze_serror(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1536 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1537 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1538 | u32 serror = ehc->i.serror; |
| 1539 | unsigned int err_mask = 0, action = 0; |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1540 | u32 hotplug_mask; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1541 | |
Tejun Heo | e0614db | 2008-05-19 01:15:09 +0900 | [diff] [blame] | 1542 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1543 | err_mask |= AC_ERR_ATA_BUS; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1544 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1545 | } |
| 1546 | if (serror & SERR_PROTOCOL) { |
| 1547 | err_mask |= AC_ERR_HSM; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1548 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1549 | } |
| 1550 | if (serror & SERR_INTERNAL) { |
| 1551 | err_mask |= AC_ERR_SYSTEM; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1552 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1553 | } |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1554 | |
| 1555 | /* Determine whether a hotplug event has occurred. Both |
| 1556 | * SError.N/X are considered hotplug events for enabled or |
| 1557 | * host links. For disabled PMP links, only N bit is |
| 1558 | * considered as X bit is left at 1 for link plugging. |
| 1559 | */ |
| 1560 | hotplug_mask = 0; |
| 1561 | |
| 1562 | if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) |
| 1563 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
| 1564 | else |
| 1565 | hotplug_mask = SERR_PHYRDY_CHG; |
| 1566 | |
| 1567 | if (serror & hotplug_mask) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 1568 | ata_ehi_hotplugged(&ehc->i); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1569 | |
| 1570 | ehc->i.err_mask |= err_mask; |
| 1571 | ehc->i.action |= action; |
| 1572 | } |
| 1573 | |
| 1574 | /** |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1575 | * ata_eh_analyze_ncq_error - analyze NCQ error |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1576 | * @link: ATA link to analyze NCQ error for |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1577 | * |
| 1578 | * Read log page 10h, determine the offending qc and acquire |
| 1579 | * error status TF. For NCQ device errors, all LLDDs have to do |
| 1580 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes |
| 1581 | * care of the rest. |
| 1582 | * |
| 1583 | * LOCKING: |
| 1584 | * Kernel thread context (may sleep). |
| 1585 | */ |
Mark Lord | 10acf3b | 2008-05-02 02:14:53 -0400 | [diff] [blame] | 1586 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1587 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1588 | struct ata_port *ap = link->ap; |
| 1589 | struct ata_eh_context *ehc = &link->eh_context; |
| 1590 | struct ata_device *dev = link->device; |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1591 | struct ata_queued_cmd *qc; |
| 1592 | struct ata_taskfile tf; |
| 1593 | int tag, rc; |
| 1594 | |
| 1595 | /* if frozen, we can't do much */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1596 | if (ap->pflags & ATA_PFLAG_FROZEN) |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1597 | return; |
| 1598 | |
| 1599 | /* is it NCQ device error? */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1600 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1601 | return; |
| 1602 | |
| 1603 | /* has LLDD analyzed already? */ |
| 1604 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 1605 | qc = __ata_qc_from_tag(ap, tag); |
| 1606 | |
| 1607 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
| 1608 | continue; |
| 1609 | |
| 1610 | if (qc->err_mask) |
| 1611 | return; |
| 1612 | } |
| 1613 | |
| 1614 | /* okay, this error is ours */ |
| 1615 | rc = ata_eh_read_log_10h(dev, &tag, &tf); |
| 1616 | if (rc) { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1617 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1618 | "(errno=%d)\n", rc); |
| 1619 | return; |
| 1620 | } |
| 1621 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1622 | if (!(link->sactive & (1 << tag))) { |
| 1623 | ata_link_printk(link, KERN_ERR, "log page 10h reported " |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1624 | "inactive tag %d\n", tag); |
| 1625 | return; |
| 1626 | } |
| 1627 | |
| 1628 | /* we've got the perpetrator, condemn it */ |
| 1629 | qc = __ata_qc_from_tag(ap, tag); |
| 1630 | memcpy(&qc->result_tf, &tf, sizeof(tf)); |
Mark Lord | a6116c9 | 2008-04-23 22:36:25 -0400 | [diff] [blame] | 1631 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
Tejun Heo | 5335b72 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 1632 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1633 | ehc->i.err_mask &= ~AC_ERR_DEV; |
| 1634 | } |
| 1635 | |
| 1636 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1637 | * ata_eh_analyze_tf - analyze taskfile of a failed qc |
| 1638 | * @qc: qc to analyze |
| 1639 | * @tf: Taskfile registers to analyze |
| 1640 | * |
| 1641 | * Analyze taskfile of @qc and further determine cause of |
| 1642 | * failure. This function also requests ATAPI sense data if |
| 1643 | * avaliable. |
| 1644 | * |
| 1645 | * LOCKING: |
| 1646 | * Kernel thread context (may sleep). |
| 1647 | * |
| 1648 | * RETURNS: |
| 1649 | * Determined recovery action |
| 1650 | */ |
| 1651 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, |
| 1652 | const struct ata_taskfile *tf) |
| 1653 | { |
| 1654 | unsigned int tmp, action = 0; |
| 1655 | u8 stat = tf->command, err = tf->feature; |
| 1656 | |
| 1657 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { |
| 1658 | qc->err_mask |= AC_ERR_HSM; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1659 | return ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1660 | } |
| 1661 | |
Tejun Heo | a51d644 | 2007-03-20 15:24:11 +0900 | [diff] [blame] | 1662 | if (stat & (ATA_ERR | ATA_DF)) |
| 1663 | qc->err_mask |= AC_ERR_DEV; |
| 1664 | else |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1665 | return 0; |
| 1666 | |
| 1667 | switch (qc->dev->class) { |
| 1668 | case ATA_DEV_ATA: |
| 1669 | if (err & ATA_ICRC) |
| 1670 | qc->err_mask |= AC_ERR_ATA_BUS; |
| 1671 | if (err & ATA_UNC) |
| 1672 | qc->err_mask |= AC_ERR_MEDIA; |
| 1673 | if (err & ATA_IDNF) |
| 1674 | qc->err_mask |= AC_ERR_INVALID; |
| 1675 | break; |
| 1676 | |
| 1677 | case ATA_DEV_ATAPI: |
Tejun Heo | a569a30 | 2006-11-21 10:40:51 +0900 | [diff] [blame] | 1678 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1679 | tmp = atapi_eh_request_sense(qc->dev, |
| 1680 | qc->scsicmd->sense_buffer, |
| 1681 | qc->result_tf.feature >> 4); |
Tejun Heo | a569a30 | 2006-11-21 10:40:51 +0900 | [diff] [blame] | 1682 | if (!tmp) { |
| 1683 | /* ATA_QCFLAG_SENSE_VALID is used to |
| 1684 | * tell atapi_qc_complete() that sense |
| 1685 | * data is already valid. |
| 1686 | * |
| 1687 | * TODO: interpret sense data and set |
| 1688 | * appropriate err_mask. |
| 1689 | */ |
| 1690 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
| 1691 | } else |
| 1692 | qc->err_mask |= tmp; |
| 1693 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1694 | } |
| 1695 | |
| 1696 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1697 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1698 | |
| 1699 | return action; |
| 1700 | } |
| 1701 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1702 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
| 1703 | int *xfer_ok) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1704 | { |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1705 | int base = 0; |
| 1706 | |
| 1707 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) |
| 1708 | *xfer_ok = 1; |
| 1709 | |
| 1710 | if (!*xfer_ok) |
Tejun Heo | 75f9caf | 2008-01-03 01:21:14 +0900 | [diff] [blame] | 1711 | base = ATA_ECAT_DUBIOUS_NONE; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1712 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1713 | if (err_mask & AC_ERR_ATA_BUS) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1714 | return base + ATA_ECAT_ATA_BUS; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1715 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1716 | if (err_mask & AC_ERR_TIMEOUT) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1717 | return base + ATA_ECAT_TOUT_HSM; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1718 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1719 | if (eflags & ATA_EFLAG_IS_IO) { |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1720 | if (err_mask & AC_ERR_HSM) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1721 | return base + ATA_ECAT_TOUT_HSM; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1722 | if ((err_mask & |
| 1723 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1724 | return base + ATA_ECAT_UNK_DEV; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1725 | } |
| 1726 | |
| 1727 | return 0; |
| 1728 | } |
| 1729 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1730 | struct speed_down_verdict_arg { |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1731 | u64 since; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1732 | int xfer_ok; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1733 | int nr_errors[ATA_ECAT_NR]; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1734 | }; |
| 1735 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1736 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1737 | { |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1738 | struct speed_down_verdict_arg *arg = void_arg; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1739 | int cat; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1740 | |
| 1741 | if (ent->timestamp < arg->since) |
| 1742 | return -1; |
| 1743 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1744 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
| 1745 | &arg->xfer_ok); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1746 | arg->nr_errors[cat]++; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1747 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1748 | return 0; |
| 1749 | } |
| 1750 | |
| 1751 | /** |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1752 | * ata_eh_speed_down_verdict - Determine speed down verdict |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1753 | * @dev: Device of interest |
| 1754 | * |
| 1755 | * This function examines error ring of @dev and determines |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1756 | * whether NCQ needs to be turned off, transfer speed should be |
| 1757 | * stepped down, or falling back to PIO is necessary. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1758 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1759 | * ECAT_ATA_BUS : ATA_BUS error for any command |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1760 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1761 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for |
| 1762 | * IO commands |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1763 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1764 | * ECAT_UNK_DEV : Unknown DEV error for IO commands |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1765 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1766 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
| 1767 | * data transfer hasn't been verified. |
| 1768 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1769 | * Verdicts are |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1770 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1771 | * NCQ_OFF : Turn off NCQ. |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1772 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1773 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
| 1774 | * to PIO. |
| 1775 | * |
| 1776 | * FALLBACK_TO_PIO : Fall back to PIO. |
| 1777 | * |
| 1778 | * Even if multiple verdicts are returned, only one action is |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1779 | * taken per error. An action triggered by non-DUBIOUS errors |
| 1780 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. |
| 1781 | * This is to expedite speed down decisions right after device is |
| 1782 | * initially configured. |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1783 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1784 | * The followings are speed down rules. #1 and #2 deal with |
| 1785 | * DUBIOUS errors. |
| 1786 | * |
| 1787 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
| 1788 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. |
| 1789 | * |
| 1790 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors |
| 1791 | * occurred during last 5 mins, NCQ_OFF. |
| 1792 | * |
| 1793 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1794 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
| 1795 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1796 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1797 | * during last 10 mins, NCQ_OFF. |
| 1798 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1799 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1800 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1801 | * |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1802 | * LOCKING: |
| 1803 | * Inherited from caller. |
| 1804 | * |
| 1805 | * RETURNS: |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1806 | * OR of ATA_EH_SPDN_* flags. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1807 | */ |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1808 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1809 | { |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1810 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
| 1811 | u64 j64 = get_jiffies_64(); |
| 1812 | struct speed_down_verdict_arg arg; |
| 1813 | unsigned int verdict = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1814 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1815 | /* scan past 5 mins of error history */ |
| 1816 | memset(&arg, 0, sizeof(arg)); |
| 1817 | arg.since = j64 - min(j64, j5mins); |
| 1818 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
| 1819 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1820 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
| 1821 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) |
| 1822 | verdict |= ATA_EH_SPDN_SPEED_DOWN | |
| 1823 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; |
| 1824 | |
| 1825 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + |
| 1826 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) |
| 1827 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; |
| 1828 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1829 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
| 1830 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 1831 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1832 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
| 1833 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1834 | /* scan past 10 mins of error history */ |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1835 | memset(&arg, 0, sizeof(arg)); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1836 | arg.since = j64 - min(j64, j10mins); |
| 1837 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1838 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1839 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
| 1840 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1841 | verdict |= ATA_EH_SPDN_NCQ_OFF; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1842 | |
| 1843 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
| 1844 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 1845 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1846 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1847 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1848 | return verdict; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1849 | } |
| 1850 | |
| 1851 | /** |
| 1852 | * ata_eh_speed_down - record error and speed down if necessary |
| 1853 | * @dev: Failed device |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1854 | * @eflags: mask of ATA_EFLAG_* flags |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1855 | * @err_mask: err_mask of the error |
| 1856 | * |
| 1857 | * Record error and examine error history to determine whether |
| 1858 | * adjusting transmission speed is necessary. It also sets |
| 1859 | * transmission limits appropriately if such adjustment is |
| 1860 | * necessary. |
| 1861 | * |
| 1862 | * LOCKING: |
| 1863 | * Kernel thread context (may sleep). |
| 1864 | * |
| 1865 | * RETURNS: |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1866 | * Determined recovery action. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1867 | */ |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1868 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
| 1869 | unsigned int eflags, unsigned int err_mask) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1870 | { |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 1871 | struct ata_link *link = ata_dev_phys_link(dev); |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1872 | int xfer_ok = 0; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1873 | unsigned int verdict; |
| 1874 | unsigned int action = 0; |
| 1875 | |
| 1876 | /* don't bother if Cat-0 error */ |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1877 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1878 | return 0; |
| 1879 | |
| 1880 | /* record error and determine whether speed down is necessary */ |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1881 | ata_ering_record(&dev->ering, eflags, err_mask); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1882 | verdict = ata_eh_speed_down_verdict(dev); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1883 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1884 | /* turn off NCQ? */ |
| 1885 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && |
| 1886 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | |
| 1887 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { |
| 1888 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
| 1889 | ata_dev_printk(dev, KERN_WARNING, |
| 1890 | "NCQ disabled due to excessive errors\n"); |
| 1891 | goto done; |
| 1892 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1893 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1894 | /* speed down? */ |
| 1895 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { |
| 1896 | /* speed down SATA link speed if possible */ |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 1897 | if (sata_down_spd_limit(link, 0) == 0) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1898 | action |= ATA_EH_RESET; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1899 | goto done; |
| 1900 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1901 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1902 | /* lower transfer mode */ |
| 1903 | if (dev->spdn_cnt < 2) { |
| 1904 | static const int dma_dnxfer_sel[] = |
| 1905 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; |
| 1906 | static const int pio_dnxfer_sel[] = |
| 1907 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; |
| 1908 | int sel; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1909 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1910 | if (dev->xfer_shift != ATA_SHIFT_PIO) |
| 1911 | sel = dma_dnxfer_sel[dev->spdn_cnt]; |
| 1912 | else |
| 1913 | sel = pio_dnxfer_sel[dev->spdn_cnt]; |
| 1914 | |
| 1915 | dev->spdn_cnt++; |
| 1916 | |
| 1917 | if (ata_down_xfermask_limit(dev, sel) == 0) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1918 | action |= ATA_EH_RESET; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1919 | goto done; |
| 1920 | } |
| 1921 | } |
| 1922 | } |
| 1923 | |
| 1924 | /* Fall back to PIO? Slowing down to PIO is meaningless for |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 1925 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1926 | */ |
| 1927 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 1928 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1929 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
| 1930 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { |
| 1931 | dev->spdn_cnt = 0; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1932 | action |= ATA_EH_RESET; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1933 | goto done; |
| 1934 | } |
| 1935 | } |
| 1936 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1937 | return 0; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1938 | done: |
| 1939 | /* device has been slowed down, blow error history */ |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1940 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
| 1941 | ata_ering_clear(&dev->ering); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1942 | return action; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1943 | } |
| 1944 | |
| 1945 | /** |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 1946 | * ata_eh_link_autopsy - analyze error and determine recovery action |
| 1947 | * @link: host link to perform autopsy on |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1948 | * |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1949 | * Analyze why @link failed and determine which recovery actions |
| 1950 | * are needed. This function also sets more detailed AC_ERR_* |
| 1951 | * values and fills sense data for ATAPI CHECK SENSE. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1952 | * |
| 1953 | * LOCKING: |
| 1954 | * Kernel thread context (may sleep). |
| 1955 | */ |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 1956 | static void ata_eh_link_autopsy(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1957 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1958 | struct ata_port *ap = link->ap; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1959 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 1960 | struct ata_device *dev; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1961 | unsigned int all_err_mask = 0, eflags = 0; |
| 1962 | int tag; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1963 | u32 serror; |
| 1964 | int rc; |
| 1965 | |
| 1966 | DPRINTK("ENTER\n"); |
| 1967 | |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 1968 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
| 1969 | return; |
| 1970 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1971 | /* obtain and analyze SError */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1972 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1973 | if (rc == 0) { |
| 1974 | ehc->i.serror |= serror; |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1975 | ata_eh_analyze_serror(link); |
Tejun Heo | 4e57c51 | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 1976 | } else if (rc != -EOPNOTSUPP) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1977 | /* SError read failed, force reset and probing */ |
Tejun Heo | b558edd | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1978 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1979 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 4e57c51 | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 1980 | ehc->i.err_mask |= AC_ERR_OTHER; |
| 1981 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1982 | |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1983 | /* analyze NCQ failure */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1984 | ata_eh_analyze_ncq_error(link); |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1985 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1986 | /* any real error trumps AC_ERR_OTHER */ |
| 1987 | if (ehc->i.err_mask & ~AC_ERR_OTHER) |
| 1988 | ehc->i.err_mask &= ~AC_ERR_OTHER; |
| 1989 | |
| 1990 | all_err_mask |= ehc->i.err_mask; |
| 1991 | |
| 1992 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 1993 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
| 1994 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 1995 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
| 1996 | ata_dev_phys_link(qc->dev) != link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1997 | continue; |
| 1998 | |
| 1999 | /* inherit upper level err_mask */ |
| 2000 | qc->err_mask |= ehc->i.err_mask; |
| 2001 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2002 | /* analyze TF */ |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2003 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2004 | |
| 2005 | /* DEV errors are probably spurious in case of ATA_BUS error */ |
| 2006 | if (qc->err_mask & AC_ERR_ATA_BUS) |
| 2007 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | |
| 2008 | AC_ERR_INVALID); |
| 2009 | |
| 2010 | /* any real error trumps unknown error */ |
| 2011 | if (qc->err_mask & ~AC_ERR_OTHER) |
| 2012 | qc->err_mask &= ~AC_ERR_OTHER; |
| 2013 | |
| 2014 | /* SENSE_VALID trumps dev/unknown error and revalidation */ |
Tejun Heo | f90f082 | 2007-10-26 16:12:41 +0900 | [diff] [blame] | 2015 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2016 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2017 | |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 2018 | /* determine whether the command is worth retrying */ |
| 2019 | if (!(qc->err_mask & AC_ERR_INVALID) && |
| 2020 | ((qc->flags & ATA_QCFLAG_IO) || qc->err_mask != AC_ERR_DEV)) |
| 2021 | qc->flags |= ATA_QCFLAG_RETRY; |
| 2022 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2023 | /* accumulate error info */ |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2024 | ehc->i.dev = qc->dev; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2025 | all_err_mask |= qc->err_mask; |
| 2026 | if (qc->flags & ATA_QCFLAG_IO) |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2027 | eflags |= ATA_EFLAG_IS_IO; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2028 | } |
| 2029 | |
Tejun Heo | a20f33f | 2006-05-16 12:58:24 +0900 | [diff] [blame] | 2030 | /* enforce default EH actions */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 2031 | if (ap->pflags & ATA_PFLAG_FROZEN || |
Tejun Heo | a20f33f | 2006-05-16 12:58:24 +0900 | [diff] [blame] | 2032 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2033 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2034 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
| 2035 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2036 | ehc->i.action |= ATA_EH_REVALIDATE; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2037 | |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2038 | /* If we have offending qcs and the associated failed device, |
| 2039 | * perform per-dev EH action only on the offending device. |
| 2040 | */ |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2041 | if (ehc->i.dev) { |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2042 | ehc->i.dev_action[ehc->i.dev->devno] |= |
| 2043 | ehc->i.action & ATA_EH_PERDEV_MASK; |
| 2044 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 2045 | } |
| 2046 | |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2047 | /* propagate timeout to host link */ |
| 2048 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) |
| 2049 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; |
| 2050 | |
| 2051 | /* record error and consider speeding down */ |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2052 | dev = ehc->i.dev; |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2053 | if (!dev && ((ata_link_max_devices(link) == 1 && |
| 2054 | ata_dev_enabled(link->device)))) |
| 2055 | dev = link->device; |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2056 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 2057 | if (dev) { |
| 2058 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) |
| 2059 | eflags |= ATA_EFLAG_DUBIOUS_XFER; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2060 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 2061 | } |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2062 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2063 | DPRINTK("EXIT\n"); |
| 2064 | } |
| 2065 | |
| 2066 | /** |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2067 | * ata_eh_autopsy - analyze error and determine recovery action |
| 2068 | * @ap: host port to perform autopsy on |
| 2069 | * |
| 2070 | * Analyze all links of @ap and determine why they failed and |
| 2071 | * which recovery actions are needed. |
| 2072 | * |
| 2073 | * LOCKING: |
| 2074 | * Kernel thread context (may sleep). |
| 2075 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2076 | void ata_eh_autopsy(struct ata_port *ap) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2077 | { |
| 2078 | struct ata_link *link; |
| 2079 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2080 | ata_for_each_link(link, ap, EDGE) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2081 | ata_eh_link_autopsy(link); |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2082 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2083 | /* Handle the frigging slave link. Autopsy is done similarly |
| 2084 | * but actions and flags are transferred over to the master |
| 2085 | * link and handled from there. |
| 2086 | */ |
| 2087 | if (ap->slave_link) { |
| 2088 | struct ata_eh_context *mehc = &ap->link.eh_context; |
| 2089 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; |
| 2090 | |
Tejun Heo | 848e4c6 | 2008-10-21 14:26:39 +0900 | [diff] [blame] | 2091 | /* transfer control flags from master to slave */ |
| 2092 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; |
| 2093 | |
| 2094 | /* perform autopsy on the slave link */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2095 | ata_eh_link_autopsy(ap->slave_link); |
| 2096 | |
Tejun Heo | 848e4c6 | 2008-10-21 14:26:39 +0900 | [diff] [blame] | 2097 | /* transfer actions from slave to master and clear slave */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2098 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
| 2099 | mehc->i.action |= sehc->i.action; |
| 2100 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; |
| 2101 | mehc->i.flags |= sehc->i.flags; |
| 2102 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
| 2103 | } |
| 2104 | |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2105 | /* Autopsy of fanout ports can affect host link autopsy. |
| 2106 | * Perform host link autopsy last. |
| 2107 | */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 2108 | if (sata_pmp_attached(ap)) |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2109 | ata_eh_link_autopsy(&ap->link); |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2110 | } |
| 2111 | |
| 2112 | /** |
| 2113 | * ata_eh_link_report - report error handling to user |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2114 | * @link: ATA link EH is going on |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2115 | * |
| 2116 | * Report EH to user. |
| 2117 | * |
| 2118 | * LOCKING: |
| 2119 | * None. |
| 2120 | */ |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2121 | static void ata_eh_link_report(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2122 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2123 | struct ata_port *ap = link->ap; |
| 2124 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2125 | const char *frozen, *desc; |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2126 | char tries_buf[6]; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2127 | int tag, nr_failed = 0; |
| 2128 | |
Tejun Heo | 94ff3d5 | 2007-10-09 14:57:56 +0900 | [diff] [blame] | 2129 | if (ehc->i.flags & ATA_EHI_QUIET) |
| 2130 | return; |
| 2131 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2132 | desc = NULL; |
| 2133 | if (ehc->i.desc[0] != '\0') |
| 2134 | desc = ehc->i.desc; |
| 2135 | |
| 2136 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 2137 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
| 2138 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2139 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
| 2140 | ata_dev_phys_link(qc->dev) != link || |
Tejun Heo | e027bd3 | 2007-10-26 16:19:26 +0900 | [diff] [blame] | 2141 | ((qc->flags & ATA_QCFLAG_QUIET) && |
| 2142 | qc->err_mask == AC_ERR_DEV)) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2143 | continue; |
| 2144 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) |
| 2145 | continue; |
| 2146 | |
| 2147 | nr_failed++; |
| 2148 | } |
| 2149 | |
| 2150 | if (!nr_failed && !ehc->i.err_mask) |
| 2151 | return; |
| 2152 | |
| 2153 | frozen = ""; |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 2154 | if (ap->pflags & ATA_PFLAG_FROZEN) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2155 | frozen = " frozen"; |
| 2156 | |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2157 | memset(tries_buf, 0, sizeof(tries_buf)); |
| 2158 | if (ap->eh_tries < ATA_EH_MAX_TRIES) |
| 2159 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", |
| 2160 | ap->eh_tries); |
| 2161 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2162 | if (ehc->i.dev) { |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 2163 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2164 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
| 2165 | ehc->i.err_mask, link->sactive, ehc->i.serror, |
| 2166 | ehc->i.action, frozen, tries_buf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2167 | if (desc) |
Tejun Heo | b64bbc3 | 2007-07-16 14:29:39 +0900 | [diff] [blame] | 2168 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2169 | } else { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2170 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2171 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
| 2172 | ehc->i.err_mask, link->sactive, ehc->i.serror, |
| 2173 | ehc->i.action, frozen, tries_buf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2174 | if (desc) |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2175 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2176 | } |
| 2177 | |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2178 | if (ehc->i.serror) |
Tejun Heo | da0e21d | 2008-07-31 16:08:38 +0900 | [diff] [blame] | 2179 | ata_link_printk(link, KERN_ERR, |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2180 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
| 2181 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", |
| 2182 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", |
| 2183 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", |
| 2184 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", |
| 2185 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", |
| 2186 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", |
| 2187 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", |
| 2188 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", |
| 2189 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", |
| 2190 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", |
| 2191 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", |
| 2192 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", |
| 2193 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", |
| 2194 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", |
| 2195 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", |
| 2196 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2197 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2198 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2199 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 2200 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2201 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2202 | const u8 *cdb = qc->cdb; |
| 2203 | char data_buf[20] = ""; |
| 2204 | char cdb_buf[70] = ""; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2205 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2206 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2207 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2208 | continue; |
| 2209 | |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2210 | if (qc->dma_dir != DMA_NONE) { |
| 2211 | static const char *dma_str[] = { |
| 2212 | [DMA_BIDIRECTIONAL] = "bidi", |
| 2213 | [DMA_TO_DEVICE] = "out", |
| 2214 | [DMA_FROM_DEVICE] = "in", |
| 2215 | }; |
| 2216 | static const char *prot_str[] = { |
| 2217 | [ATA_PROT_PIO] = "pio", |
| 2218 | [ATA_PROT_DMA] = "dma", |
| 2219 | [ATA_PROT_NCQ] = "ncq", |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 2220 | [ATAPI_PROT_PIO] = "pio", |
| 2221 | [ATAPI_PROT_DMA] = "dma", |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2222 | }; |
| 2223 | |
| 2224 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", |
| 2225 | prot_str[qc->tf.protocol], qc->nbytes, |
| 2226 | dma_str[qc->dma_dir]); |
| 2227 | } |
| 2228 | |
Jeff Garzik | e39eec1 | 2007-12-01 18:05:39 -0500 | [diff] [blame] | 2229 | if (ata_is_atapi(qc->tf.protocol)) |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2230 | snprintf(cdb_buf, sizeof(cdb_buf), |
| 2231 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " |
| 2232 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", |
| 2233 | cdb[0], cdb[1], cdb[2], cdb[3], |
| 2234 | cdb[4], cdb[5], cdb[6], cdb[7], |
| 2235 | cdb[8], cdb[9], cdb[10], cdb[11], |
| 2236 | cdb[12], cdb[13], cdb[14], cdb[15]); |
| 2237 | |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2238 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2239 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2240 | "tag %d%s\n %s" |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2241 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
Tejun Heo | 5335b72 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2242 | "Emask 0x%x (%s)%s\n", |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2243 | cmd->command, cmd->feature, cmd->nsect, |
| 2244 | cmd->lbal, cmd->lbam, cmd->lbah, |
| 2245 | cmd->hob_feature, cmd->hob_nsect, |
| 2246 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2247 | cmd->device, qc->tag, data_buf, cdb_buf, |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2248 | res->command, res->feature, res->nsect, |
| 2249 | res->lbal, res->lbam, res->lbah, |
| 2250 | res->hob_feature, res->hob_nsect, |
| 2251 | res->hob_lbal, res->hob_lbam, res->hob_lbah, |
Tejun Heo | 5335b72 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2252 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
| 2253 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2254 | |
| 2255 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2256 | ATA_ERR)) { |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2257 | if (res->command & ATA_BUSY) |
| 2258 | ata_dev_printk(qc->dev, KERN_ERR, |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2259 | "status: { Busy }\n"); |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2260 | else |
| 2261 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2262 | "status: { %s%s%s%s}\n", |
| 2263 | res->command & ATA_DRDY ? "DRDY " : "", |
| 2264 | res->command & ATA_DF ? "DF " : "", |
| 2265 | res->command & ATA_DRQ ? "DRQ " : "", |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2266 | res->command & ATA_ERR ? "ERR " : ""); |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2267 | } |
| 2268 | |
| 2269 | if (cmd->command != ATA_CMD_PACKET && |
| 2270 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | |
| 2271 | ATA_ABORTED))) |
| 2272 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2273 | "error: { %s%s%s%s}\n", |
| 2274 | res->feature & ATA_ICRC ? "ICRC " : "", |
| 2275 | res->feature & ATA_UNC ? "UNC " : "", |
| 2276 | res->feature & ATA_IDNF ? "IDNF " : "", |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2277 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2278 | } |
| 2279 | } |
| 2280 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2281 | /** |
| 2282 | * ata_eh_report - report error handling to user |
| 2283 | * @ap: ATA port to report EH about |
| 2284 | * |
| 2285 | * Report EH to user. |
| 2286 | * |
| 2287 | * LOCKING: |
| 2288 | * None. |
| 2289 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2290 | void ata_eh_report(struct ata_port *ap) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2291 | { |
| 2292 | struct ata_link *link; |
| 2293 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2294 | ata_for_each_link(link, ap, HOST_FIRST) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2295 | ata_eh_link_report(link); |
| 2296 | } |
| 2297 | |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2298 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2299 | unsigned int *classes, unsigned long deadline, |
| 2300 | bool clear_classes) |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2301 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2302 | struct ata_device *dev; |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2303 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2304 | if (clear_classes) |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2305 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2306 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2307 | |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2308 | return reset(link, classes, deadline); |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2309 | } |
| 2310 | |
Tejun Heo | ae791c0 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2311 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2312 | int rc, const unsigned int *classes) |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2313 | { |
Tejun Heo | 45db2f6 | 2008-04-08 01:46:56 +0900 | [diff] [blame] | 2314 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
Tejun Heo | ae791c0 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2315 | return 0; |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2316 | if (rc == -EAGAIN) |
| 2317 | return 1; |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 2318 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
Tejun Heo | 3495de7 | 2007-09-23 13:19:53 +0900 | [diff] [blame] | 2319 | return 1; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2320 | return 0; |
| 2321 | } |
| 2322 | |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2323 | int ata_eh_reset(struct ata_link *link, int classify, |
| 2324 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, |
| 2325 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2326 | { |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2327 | struct ata_port *ap = link->ap; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2328 | struct ata_link *slave = ap->slave_link; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2329 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2330 | struct ata_eh_context *sehc = &slave->eh_context; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2331 | unsigned int *classes = ehc->classes; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2332 | unsigned int lflags = link->flags; |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 2333 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 2334 | int max_tries = 0, try = 0; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2335 | struct ata_link *failed_link; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2336 | struct ata_device *dev; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2337 | unsigned long deadline, now; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2338 | ata_reset_fn_t reset; |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2339 | unsigned long flags; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2340 | u32 sstatus; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2341 | int nr_unknown, rc; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2342 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2343 | /* |
| 2344 | * Prepare to reset |
| 2345 | */ |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 2346 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
| 2347 | max_tries++; |
Tejun Heo | 05944bd | 2008-08-13 20:19:09 +0900 | [diff] [blame] | 2348 | if (link->flags & ATA_LFLAG_NO_HRST) |
| 2349 | hardreset = NULL; |
| 2350 | if (link->flags & ATA_LFLAG_NO_SRST) |
| 2351 | softreset = NULL; |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 2352 | |
Tejun Heo | 19b7232 | 2008-11-04 17:08:40 +0900 | [diff] [blame] | 2353 | /* make sure each reset attemp is at least COOL_DOWN apart */ |
| 2354 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
| 2355 | now = jiffies; |
| 2356 | WARN_ON(time_after(ehc->last_reset, now)); |
| 2357 | deadline = ata_deadline(ehc->last_reset, |
| 2358 | ATA_EH_RESET_COOL_DOWN); |
| 2359 | if (time_before(now, deadline)) |
| 2360 | schedule_timeout_uninterruptible(deadline - now); |
| 2361 | } |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 2362 | |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2363 | spin_lock_irqsave(ap->lock, flags); |
| 2364 | ap->pflags |= ATA_PFLAG_RESETTING; |
| 2365 | spin_unlock_irqrestore(ap->lock, flags); |
| 2366 | |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2367 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
Tejun Heo | 13abf50 | 2006-07-10 23:18:46 +0900 | [diff] [blame] | 2368 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2369 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | cdeab11 | 2007-10-29 16:41:09 +0900 | [diff] [blame] | 2370 | /* If we issue an SRST then an ATA drive (not ATAPI) |
| 2371 | * may change configuration and be in PIO0 timing. If |
| 2372 | * we do a hard reset (or are coming from power on) |
| 2373 | * this is true for ATA or ATAPI. Until we've set a |
| 2374 | * suitable controller mode we should not touch the |
| 2375 | * bus as we may be talking too fast. |
| 2376 | */ |
| 2377 | dev->pio_mode = XFER_PIO_0; |
| 2378 | |
| 2379 | /* If the controller has a pio mode setup function |
| 2380 | * then use it to set the chipset to rights. Don't |
| 2381 | * touch the DMA setup as that will be dealt with when |
| 2382 | * configuring devices. |
| 2383 | */ |
| 2384 | if (ap->ops->set_piomode) |
| 2385 | ap->ops->set_piomode(ap, dev); |
| 2386 | } |
| 2387 | |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2388 | /* prefer hardreset */ |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2389 | reset = NULL; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2390 | ehc->i.action &= ~ATA_EH_RESET; |
| 2391 | if (hardreset) { |
| 2392 | reset = hardreset; |
Tejun Heo | a674050 | 2008-07-31 16:07:04 +0900 | [diff] [blame] | 2393 | ehc->i.action |= ATA_EH_HARDRESET; |
Tejun Heo | 4f7faa3 | 2008-01-30 18:18:26 +0900 | [diff] [blame] | 2394 | } else if (softreset) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2395 | reset = softreset; |
Tejun Heo | a674050 | 2008-07-31 16:07:04 +0900 | [diff] [blame] | 2396 | ehc->i.action |= ATA_EH_SOFTRESET; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2397 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2398 | |
| 2399 | if (prereset) { |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2400 | unsigned long deadline = ata_deadline(jiffies, |
| 2401 | ATA_EH_PRERESET_TIMEOUT); |
| 2402 | |
| 2403 | if (slave) { |
| 2404 | sehc->i.action &= ~ATA_EH_RESET; |
| 2405 | sehc->i.action |= ehc->i.action; |
| 2406 | } |
| 2407 | |
| 2408 | rc = prereset(link, deadline); |
| 2409 | |
| 2410 | /* If present, do prereset on slave link too. Reset |
| 2411 | * is skipped iff both master and slave links report |
| 2412 | * -ENOENT or clear ATA_EH_RESET. |
| 2413 | */ |
| 2414 | if (slave && (rc == 0 || rc == -ENOENT)) { |
| 2415 | int tmp; |
| 2416 | |
| 2417 | tmp = prereset(slave, deadline); |
| 2418 | if (tmp != -ENOENT) |
| 2419 | rc = tmp; |
| 2420 | |
| 2421 | ehc->i.action |= sehc->i.action; |
| 2422 | } |
| 2423 | |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2424 | if (rc) { |
Alan Cox | c961922 | 2006-09-26 17:53:38 +0100 | [diff] [blame] | 2425 | if (rc == -ENOENT) { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2426 | ata_link_printk(link, KERN_DEBUG, |
Tejun Heo | 4aa9ab6 | 2007-03-12 17:24:08 +0900 | [diff] [blame] | 2427 | "port disabled. ignoring.\n"); |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2428 | ehc->i.action &= ~ATA_EH_RESET; |
Tejun Heo | 4aa9ab6 | 2007-03-12 17:24:08 +0900 | [diff] [blame] | 2429 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2430 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2431 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | 4aa9ab6 | 2007-03-12 17:24:08 +0900 | [diff] [blame] | 2432 | |
| 2433 | rc = 0; |
Alan Cox | c961922 | 2006-09-26 17:53:38 +0100 | [diff] [blame] | 2434 | } else |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2435 | ata_link_printk(link, KERN_ERR, |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2436 | "prereset failed (errno=%d)\n", rc); |
Tejun Heo | fccb6ea | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 2437 | goto out; |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2438 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2439 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2440 | /* prereset() might have cleared ATA_EH_RESET. If so, |
Tejun Heo | d6515e6 | 2009-03-04 15:59:30 +0900 | [diff] [blame] | 2441 | * bang classes, thaw and return. |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2442 | */ |
| 2443 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2444 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2445 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | d6515e6 | 2009-03-04 15:59:30 +0900 | [diff] [blame] | 2446 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
| 2447 | ata_is_host_link(link)) |
| 2448 | ata_eh_thaw_port(ap); |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2449 | rc = 0; |
| 2450 | goto out; |
| 2451 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2452 | } |
| 2453 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2454 | retry: |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2455 | /* |
| 2456 | * Perform reset |
| 2457 | */ |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 2458 | if (ata_is_host_link(link)) |
| 2459 | ata_eh_freeze_port(ap); |
| 2460 | |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 2461 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
Tejun Heo | 31daabd | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 2462 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2463 | if (reset) { |
| 2464 | if (verbose) |
| 2465 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", |
| 2466 | reset == softreset ? "soft" : "hard"); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2467 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2468 | /* mark that this EH session started with reset */ |
Tejun Heo | 19b7232 | 2008-11-04 17:08:40 +0900 | [diff] [blame] | 2469 | ehc->last_reset = jiffies; |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2470 | if (reset == hardreset) |
| 2471 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; |
| 2472 | else |
| 2473 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2474 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2475 | rc = ata_do_reset(link, reset, classes, deadline, true); |
| 2476 | if (rc && rc != -EAGAIN) { |
| 2477 | failed_link = link; |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2478 | goto fail; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2479 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2480 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2481 | /* hardreset slave link if existent */ |
| 2482 | if (slave && reset == hardreset) { |
| 2483 | int tmp; |
| 2484 | |
| 2485 | if (verbose) |
| 2486 | ata_link_printk(slave, KERN_INFO, |
| 2487 | "hard resetting link\n"); |
| 2488 | |
| 2489 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); |
| 2490 | tmp = ata_do_reset(slave, reset, classes, deadline, |
| 2491 | false); |
| 2492 | switch (tmp) { |
| 2493 | case -EAGAIN: |
| 2494 | rc = -EAGAIN; |
| 2495 | case 0: |
| 2496 | break; |
| 2497 | default: |
| 2498 | failed_link = slave; |
| 2499 | rc = tmp; |
| 2500 | goto fail; |
| 2501 | } |
| 2502 | } |
| 2503 | |
| 2504 | /* perform follow-up SRST if necessary */ |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2505 | if (reset == hardreset && |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2506 | ata_eh_followup_srst_needed(link, rc, classes)) { |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2507 | reset = softreset; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2508 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2509 | if (!reset) { |
| 2510 | ata_link_printk(link, KERN_ERR, |
| 2511 | "follow-up softreset required " |
| 2512 | "but no softreset avaliable\n"); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2513 | failed_link = link; |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2514 | rc = -EINVAL; |
| 2515 | goto fail; |
| 2516 | } |
| 2517 | |
| 2518 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2519 | rc = ata_do_reset(link, reset, classes, deadline, true); |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2520 | } |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2521 | } else { |
| 2522 | if (verbose) |
| 2523 | ata_link_printk(link, KERN_INFO, "no reset method " |
| 2524 | "available, skipping reset\n"); |
| 2525 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) |
| 2526 | lflags |= ATA_LFLAG_ASSUME_ATA; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2527 | } |
| 2528 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2529 | /* |
| 2530 | * Post-reset processing |
| 2531 | */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2532 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2533 | /* After the reset, the device state is PIO 0 and the |
| 2534 | * controller state is undefined. Reset also wakes up |
| 2535 | * drives from sleeping mode. |
| 2536 | */ |
| 2537 | dev->pio_mode = XFER_PIO_0; |
| 2538 | dev->flags &= ~ATA_DFLAG_SLEEPING; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2539 | |
Tejun Heo | 816ab89 | 2008-10-22 00:31:34 +0900 | [diff] [blame] | 2540 | if (!ata_phys_link_offline(ata_dev_phys_link(dev))) { |
| 2541 | /* apply class override */ |
| 2542 | if (lflags & ATA_LFLAG_ASSUME_ATA) |
| 2543 | classes[dev->devno] = ATA_DEV_ATA; |
| 2544 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) |
| 2545 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; |
| 2546 | } else |
| 2547 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2548 | } |
| 2549 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2550 | /* record current link speed */ |
| 2551 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) |
| 2552 | link->sata_spd = (sstatus >> 4) & 0xf; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2553 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
| 2554 | slave->sata_spd = (sstatus >> 4) & 0xf; |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2555 | |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 2556 | /* thaw the port */ |
| 2557 | if (ata_is_host_link(link)) |
| 2558 | ata_eh_thaw_port(ap); |
| 2559 | |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2560 | /* postreset() should clear hardware SError. Although SError |
| 2561 | * is cleared during link resume, clearing SError here is |
| 2562 | * necessary as some PHYs raise hotplug events after SRST. |
| 2563 | * This introduces race condition where hotplug occurs between |
| 2564 | * reset and here. This race is mediated by cross checking |
| 2565 | * link onlineness and classification result later. |
| 2566 | */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2567 | if (postreset) { |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2568 | postreset(link, classes); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2569 | if (slave) |
| 2570 | postreset(slave, classes); |
| 2571 | } |
Tejun Heo | 20952b6 | 2006-05-31 18:27:23 +0900 | [diff] [blame] | 2572 | |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2573 | /* clear cached SError */ |
| 2574 | spin_lock_irqsave(link->ap->lock, flags); |
| 2575 | link->eh_info.serror = 0; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2576 | if (slave) |
| 2577 | slave->eh_info.serror = 0; |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2578 | spin_unlock_irqrestore(link->ap->lock, flags); |
| 2579 | |
| 2580 | /* Make sure onlineness and classification result correspond. |
| 2581 | * Hotplug could have happened during reset and some |
| 2582 | * controllers fail to wait while a drive is spinning up after |
| 2583 | * being hotplugged causing misdetection. By cross checking |
| 2584 | * link onlineness and classification result, those conditions |
| 2585 | * can be reliably detected and retried. |
| 2586 | */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2587 | nr_unknown = 0; |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2588 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2589 | /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2590 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2591 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2592 | if (ata_phys_link_online(ata_dev_phys_link(dev))) |
| 2593 | nr_unknown++; |
| 2594 | } |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2595 | } |
| 2596 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2597 | if (classify && nr_unknown) { |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2598 | if (try < max_tries) { |
| 2599 | ata_link_printk(link, KERN_WARNING, "link online but " |
| 2600 | "device misclassified, retrying\n"); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2601 | failed_link = link; |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2602 | rc = -EAGAIN; |
| 2603 | goto fail; |
| 2604 | } |
| 2605 | ata_link_printk(link, KERN_WARNING, |
| 2606 | "link online but device misclassified, " |
| 2607 | "device detection might fail\n"); |
| 2608 | } |
| 2609 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2610 | /* reset successful, schedule revalidation */ |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2611 | ata_eh_done(link, NULL, ATA_EH_RESET); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2612 | if (slave) |
| 2613 | ata_eh_done(slave, NULL, ATA_EH_RESET); |
Tejun Heo | 19b7232 | 2008-11-04 17:08:40 +0900 | [diff] [blame] | 2614 | ehc->last_reset = jiffies; /* update to completion time */ |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2615 | ehc->i.action |= ATA_EH_REVALIDATE; |
Tejun Heo | ae791c0 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2616 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2617 | rc = 0; |
Tejun Heo | fccb6ea | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 2618 | out: |
| 2619 | /* clear hotplug flag */ |
| 2620 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2621 | if (slave) |
| 2622 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2623 | |
| 2624 | spin_lock_irqsave(ap->lock, flags); |
| 2625 | ap->pflags &= ~ATA_PFLAG_RESETTING; |
| 2626 | spin_unlock_irqrestore(ap->lock, flags); |
| 2627 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2628 | return rc; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2629 | |
| 2630 | fail: |
Tejun Heo | 5958e30 | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 2631 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
| 2632 | if (!ata_is_host_link(link) && |
| 2633 | sata_scr_read(link, SCR_STATUS, &sstatus)) |
| 2634 | rc = -ERESTART; |
| 2635 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2636 | if (rc == -ERESTART || try >= max_tries) |
| 2637 | goto out; |
| 2638 | |
| 2639 | now = jiffies; |
| 2640 | if (time_before(now, deadline)) { |
| 2641 | unsigned long delta = deadline - now; |
| 2642 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2643 | ata_link_printk(failed_link, KERN_WARNING, |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 2644 | "reset failed (errno=%d), retrying in %u secs\n", |
| 2645 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2646 | |
| 2647 | while (delta) |
| 2648 | delta = schedule_timeout_uninterruptible(delta); |
| 2649 | } |
| 2650 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2651 | if (try == max_tries - 1) { |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 2652 | sata_down_spd_limit(link, 0); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2653 | if (slave) |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 2654 | sata_down_spd_limit(slave, 0); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2655 | } else if (rc == -EPIPE) |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 2656 | sata_down_spd_limit(failed_link, 0); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2657 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2658 | if (hardreset) |
| 2659 | reset = hardreset; |
| 2660 | goto retry; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2661 | } |
| 2662 | |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 2663 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
| 2664 | { |
| 2665 | struct ata_link *link; |
| 2666 | struct ata_device *dev; |
| 2667 | unsigned long flags; |
| 2668 | |
| 2669 | /* |
| 2670 | * This function can be thought of as an extended version of |
| 2671 | * ata_eh_about_to_do() specially crafted to accommodate the |
| 2672 | * requirements of ATA_EH_PARK handling. Since the EH thread |
| 2673 | * does not leave the do {} while () loop in ata_eh_recover as |
| 2674 | * long as the timeout for a park request to *one* device on |
| 2675 | * the port has not expired, and since we still want to pick |
| 2676 | * up park requests to other devices on the same port or |
| 2677 | * timeout updates for the same device, we have to pull |
| 2678 | * ATA_EH_PARK actions from eh_info into eh_context.i |
| 2679 | * ourselves at the beginning of each pass over the loop. |
| 2680 | * |
| 2681 | * Additionally, all write accesses to &ap->park_req_pending |
| 2682 | * through INIT_COMPLETION() (see below) or complete_all() |
| 2683 | * (see ata_scsi_park_store()) are protected by the host lock. |
| 2684 | * As a result we have that park_req_pending.done is zero on |
| 2685 | * exit from this function, i.e. when ATA_EH_PARK actions for |
| 2686 | * *all* devices on port ap have been pulled into the |
| 2687 | * respective eh_context structs. If, and only if, |
| 2688 | * park_req_pending.done is non-zero by the time we reach |
| 2689 | * wait_for_completion_timeout(), another ATA_EH_PARK action |
| 2690 | * has been scheduled for at least one of the devices on port |
| 2691 | * ap and we have to cycle over the do {} while () loop in |
| 2692 | * ata_eh_recover() again. |
| 2693 | */ |
| 2694 | |
| 2695 | spin_lock_irqsave(ap->lock, flags); |
| 2696 | INIT_COMPLETION(ap->park_req_pending); |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2697 | ata_for_each_link(link, ap, EDGE) { |
| 2698 | ata_for_each_dev(dev, link, ALL) { |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 2699 | struct ata_eh_info *ehi = &link->eh_info; |
| 2700 | |
| 2701 | link->eh_context.i.dev_action[dev->devno] |= |
| 2702 | ehi->dev_action[dev->devno] & ATA_EH_PARK; |
| 2703 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); |
| 2704 | } |
| 2705 | } |
| 2706 | spin_unlock_irqrestore(ap->lock, flags); |
| 2707 | } |
| 2708 | |
| 2709 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) |
| 2710 | { |
| 2711 | struct ata_eh_context *ehc = &dev->link->eh_context; |
| 2712 | struct ata_taskfile tf; |
| 2713 | unsigned int err_mask; |
| 2714 | |
| 2715 | ata_tf_init(dev, &tf); |
| 2716 | if (park) { |
| 2717 | ehc->unloaded_mask |= 1 << dev->devno; |
| 2718 | tf.command = ATA_CMD_IDLEIMMEDIATE; |
| 2719 | tf.feature = 0x44; |
| 2720 | tf.lbal = 0x4c; |
| 2721 | tf.lbam = 0x4e; |
| 2722 | tf.lbah = 0x55; |
| 2723 | } else { |
| 2724 | ehc->unloaded_mask &= ~(1 << dev->devno); |
| 2725 | tf.command = ATA_CMD_CHK_POWER; |
| 2726 | } |
| 2727 | |
| 2728 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
| 2729 | tf.protocol |= ATA_PROT_NODATA; |
| 2730 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| 2731 | if (park && (err_mask || tf.lbal != 0xc4)) { |
| 2732 | ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); |
| 2733 | ehc->unloaded_mask &= ~(1 << dev->devno); |
| 2734 | } |
| 2735 | } |
| 2736 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2737 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2738 | struct ata_device **r_failed_dev) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2739 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2740 | struct ata_port *ap = link->ap; |
| 2741 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2742 | struct ata_device *dev; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2743 | unsigned int new_mask = 0; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2744 | unsigned long flags; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2745 | int rc = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2746 | |
| 2747 | DPRINTK("ENTER\n"); |
| 2748 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2749 | /* For PATA drive side cable detection to work, IDENTIFY must |
| 2750 | * be done backwards such that PDIAG- is released by the slave |
| 2751 | * device before the master device is identified. |
| 2752 | */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2753 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2754 | unsigned int action = ata_eh_dev_action(dev); |
| 2755 | unsigned int readid_flags = 0; |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 2756 | |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2757 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
| 2758 | readid_flags |= ATA_READID_POSTRESET; |
| 2759 | |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 2760 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
Tejun Heo | 633273a | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 2761 | WARN_ON(dev->class == ATA_DEV_PMP); |
| 2762 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2763 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2764 | rc = -EIO; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2765 | goto err; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2766 | } |
| 2767 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2768 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
Tejun Heo | 422c9da | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2769 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
| 2770 | readid_flags); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2771 | if (rc) |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2772 | goto err; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2773 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2774 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 2775 | |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 2776 | /* Configuration may have changed, reconfigure |
| 2777 | * transfer mode. |
| 2778 | */ |
| 2779 | ehc->i.flags |= ATA_EHI_SETMODE; |
| 2780 | |
zhao, forrest | 3057ac3 | 2006-06-12 12:01:34 +0800 | [diff] [blame] | 2781 | /* schedule the scsi_rescan_device() here */ |
| 2782 | queue_work(ata_aux_wq, &(ap->scsi_rescan_task)); |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2783 | } else if (dev->class == ATA_DEV_UNKNOWN && |
| 2784 | ehc->tries[dev->devno] && |
| 2785 | ata_class_enabled(ehc->classes[dev->devno])) { |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 2786 | /* Temporarily set dev->class, it will be |
| 2787 | * permanently set once all configurations are |
| 2788 | * complete. This is necessary because new |
| 2789 | * device configuration is done in two |
| 2790 | * separate loops. |
| 2791 | */ |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2792 | dev->class = ehc->classes[dev->devno]; |
| 2793 | |
Tejun Heo | 633273a | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 2794 | if (dev->class == ATA_DEV_PMP) |
| 2795 | rc = sata_pmp_attach(dev); |
| 2796 | else |
| 2797 | rc = ata_dev_read_id(dev, &dev->class, |
| 2798 | readid_flags, dev->id); |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 2799 | |
| 2800 | /* read_id might have changed class, store and reset */ |
| 2801 | ehc->classes[dev->devno] = dev->class; |
| 2802 | dev->class = ATA_DEV_UNKNOWN; |
| 2803 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2804 | switch (rc) { |
| 2805 | case 0: |
Tejun Heo | 99cf610 | 2009-01-29 20:31:32 +0900 | [diff] [blame] | 2806 | /* clear error info accumulated during probe */ |
| 2807 | ata_ering_clear(&dev->ering); |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2808 | new_mask |= 1 << dev->devno; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2809 | break; |
| 2810 | case -ENOENT: |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2811 | /* IDENTIFY was issued to non-existent |
| 2812 | * device. No need to reset. Just |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 2813 | * thaw and ignore the device. |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2814 | */ |
| 2815 | ata_eh_thaw_port(ap); |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2816 | break; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2817 | default: |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2818 | goto err; |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2819 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2820 | } |
| 2821 | } |
| 2822 | |
Tejun Heo | c1c4e8d | 2007-04-23 02:05:53 +0900 | [diff] [blame] | 2823 | /* PDIAG- should have been released, ask cable type if post-reset */ |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 2824 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
| 2825 | if (ap->ops->cable_detect) |
| 2826 | ap->cbl = ap->ops->cable_detect(ap); |
| 2827 | ata_force_cbl(ap); |
| 2828 | } |
Tejun Heo | c1c4e8d | 2007-04-23 02:05:53 +0900 | [diff] [blame] | 2829 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2830 | /* Configure new devices forward such that user doesn't see |
| 2831 | * device detection messages backwards. |
| 2832 | */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2833 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 633273a | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 2834 | if (!(new_mask & (1 << dev->devno)) || |
| 2835 | dev->class == ATA_DEV_PMP) |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2836 | continue; |
| 2837 | |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 2838 | dev->class = ehc->classes[dev->devno]; |
| 2839 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2840 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
| 2841 | rc = ata_dev_configure(dev); |
| 2842 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 2843 | if (rc) { |
| 2844 | dev->class = ATA_DEV_UNKNOWN; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2845 | goto err; |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 2846 | } |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2847 | |
| 2848 | spin_lock_irqsave(ap->lock, flags); |
| 2849 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
| 2850 | spin_unlock_irqrestore(ap->lock, flags); |
| 2851 | |
| 2852 | /* new device discovered, configure xfermode */ |
| 2853 | ehc->i.flags |= ATA_EHI_SETMODE; |
| 2854 | } |
| 2855 | |
| 2856 | return 0; |
| 2857 | |
| 2858 | err: |
| 2859 | *r_failed_dev = dev; |
| 2860 | DPRINTK("EXIT rc=%d\n", rc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2861 | return rc; |
| 2862 | } |
| 2863 | |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 2864 | /** |
| 2865 | * ata_set_mode - Program timings and issue SET FEATURES - XFER |
| 2866 | * @link: link on which timings will be programmed |
Martin Olsson | 98a1708 | 2009-04-22 18:21:29 +0200 | [diff] [blame] | 2867 | * @r_failed_dev: out parameter for failed device |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 2868 | * |
| 2869 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
| 2870 | * ata_set_mode() fails, pointer to the failing device is |
| 2871 | * returned in @r_failed_dev. |
| 2872 | * |
| 2873 | * LOCKING: |
| 2874 | * PCI/etc. bus probe sem. |
| 2875 | * |
| 2876 | * RETURNS: |
| 2877 | * 0 on success, negative errno otherwise |
| 2878 | */ |
| 2879 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
| 2880 | { |
| 2881 | struct ata_port *ap = link->ap; |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 2882 | struct ata_device *dev; |
| 2883 | int rc; |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 2884 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 2885 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2886 | ata_for_each_dev(dev, link, ENABLED) { |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 2887 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
| 2888 | struct ata_ering_entry *ent; |
| 2889 | |
| 2890 | ent = ata_ering_top(&dev->ering); |
| 2891 | if (ent) |
| 2892 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; |
| 2893 | } |
| 2894 | } |
| 2895 | |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 2896 | /* has private set_mode? */ |
| 2897 | if (ap->ops->set_mode) |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 2898 | rc = ap->ops->set_mode(link, r_failed_dev); |
| 2899 | else |
| 2900 | rc = ata_do_set_mode(link, r_failed_dev); |
| 2901 | |
| 2902 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2903 | ata_for_each_dev(dev, link, ENABLED) { |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 2904 | struct ata_eh_context *ehc = &link->eh_context; |
| 2905 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; |
| 2906 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); |
| 2907 | |
| 2908 | if (dev->xfer_mode != saved_xfer_mode || |
| 2909 | ata_ncq_enabled(dev) != saved_ncq) |
| 2910 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; |
| 2911 | } |
| 2912 | |
| 2913 | return rc; |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 2914 | } |
| 2915 | |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 2916 | /** |
| 2917 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset |
| 2918 | * @dev: ATAPI device to clear UA for |
| 2919 | * |
| 2920 | * Resets and other operations can make an ATAPI device raise |
| 2921 | * UNIT ATTENTION which causes the next operation to fail. This |
| 2922 | * function clears UA. |
| 2923 | * |
| 2924 | * LOCKING: |
| 2925 | * EH context (may sleep). |
| 2926 | * |
| 2927 | * RETURNS: |
| 2928 | * 0 on success, -errno on failure. |
| 2929 | */ |
| 2930 | static int atapi_eh_clear_ua(struct ata_device *dev) |
| 2931 | { |
| 2932 | int i; |
| 2933 | |
| 2934 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { |
Tejun Heo | b535708 | 2009-03-02 18:55:16 +0900 | [diff] [blame] | 2935 | u8 *sense_buffer = dev->link->ap->sector_buf; |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 2936 | u8 sense_key = 0; |
| 2937 | unsigned int err_mask; |
| 2938 | |
| 2939 | err_mask = atapi_eh_tur(dev, &sense_key); |
| 2940 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { |
| 2941 | ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " |
| 2942 | "failed (err_mask=0x%x)\n", err_mask); |
| 2943 | return -EIO; |
| 2944 | } |
| 2945 | |
| 2946 | if (!err_mask || sense_key != UNIT_ATTENTION) |
| 2947 | return 0; |
| 2948 | |
| 2949 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); |
| 2950 | if (err_mask) { |
| 2951 | ata_dev_printk(dev, KERN_WARNING, "failed to clear " |
| 2952 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); |
| 2953 | return -EIO; |
| 2954 | } |
| 2955 | } |
| 2956 | |
| 2957 | ata_dev_printk(dev, KERN_WARNING, |
| 2958 | "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); |
| 2959 | |
| 2960 | return 0; |
| 2961 | } |
| 2962 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2963 | static int ata_link_nr_enabled(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2964 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2965 | struct ata_device *dev; |
| 2966 | int cnt = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2967 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2968 | ata_for_each_dev(dev, link, ENABLED) |
| 2969 | cnt++; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2970 | return cnt; |
| 2971 | } |
| 2972 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2973 | static int ata_link_nr_vacant(struct ata_link *link) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2974 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2975 | struct ata_device *dev; |
| 2976 | int cnt = 0; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2977 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2978 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2979 | if (dev->class == ATA_DEV_UNKNOWN) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2980 | cnt++; |
| 2981 | return cnt; |
| 2982 | } |
| 2983 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2984 | static int ata_eh_skip_recovery(struct ata_link *link) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2985 | { |
Tejun Heo | 672b2d6 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2986 | struct ata_port *ap = link->ap; |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2987 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2988 | struct ata_device *dev; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2989 | |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 2990 | /* skip disabled links */ |
| 2991 | if (link->flags & ATA_LFLAG_DISABLED) |
| 2992 | return 1; |
| 2993 | |
Tejun Heo | 672b2d6 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2994 | /* thaw frozen port and recover failed devices */ |
| 2995 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) |
| 2996 | return 0; |
| 2997 | |
| 2998 | /* reset at least once if reset is requested */ |
| 2999 | if ((ehc->i.action & ATA_EH_RESET) && |
| 3000 | !(ehc->i.flags & ATA_EHI_DID_RESET)) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3001 | return 0; |
| 3002 | |
| 3003 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3004 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3005 | if (dev->class == ATA_DEV_UNKNOWN && |
| 3006 | ehc->classes[dev->devno] != ATA_DEV_NONE) |
| 3007 | return 0; |
| 3008 | } |
| 3009 | |
| 3010 | return 1; |
| 3011 | } |
| 3012 | |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 3013 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
| 3014 | { |
| 3015 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); |
| 3016 | u64 now = get_jiffies_64(); |
| 3017 | int *trials = void_arg; |
| 3018 | |
| 3019 | if (ent->timestamp < now - min(now, interval)) |
| 3020 | return -1; |
| 3021 | |
| 3022 | (*trials)++; |
| 3023 | return 0; |
| 3024 | } |
| 3025 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3026 | static int ata_eh_schedule_probe(struct ata_device *dev) |
| 3027 | { |
| 3028 | struct ata_eh_context *ehc = &dev->link->eh_context; |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 3029 | struct ata_link *link = ata_dev_phys_link(dev); |
| 3030 | int trials = 0; |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3031 | |
| 3032 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || |
| 3033 | (ehc->did_probe_mask & (1 << dev->devno))) |
| 3034 | return 0; |
| 3035 | |
| 3036 | ata_eh_detach_dev(dev); |
| 3037 | ata_dev_init(dev); |
| 3038 | ehc->did_probe_mask |= (1 << dev->devno); |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 3039 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 3040 | ehc->saved_xfer_mode[dev->devno] = 0; |
| 3041 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3042 | |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 3043 | /* Record and count probe trials on the ering. The specific |
| 3044 | * error mask used is irrelevant. Because a successful device |
| 3045 | * detection clears the ering, this count accumulates only if |
| 3046 | * there are consecutive failed probes. |
| 3047 | * |
| 3048 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS |
| 3049 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is |
| 3050 | * forced to 1.5Gbps. |
| 3051 | * |
| 3052 | * This is to work around cases where failed link speed |
| 3053 | * negotiation results in device misdetection leading to |
| 3054 | * infinite DEVXCHG or PHRDY CHG events. |
| 3055 | */ |
| 3056 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); |
| 3057 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); |
| 3058 | |
| 3059 | if (trials > ATA_EH_PROBE_TRIALS) |
| 3060 | sata_down_spd_limit(link, 1); |
| 3061 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3062 | return 1; |
| 3063 | } |
| 3064 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3065 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3066 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 3067 | struct ata_eh_context *ehc = &dev->link->eh_context; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3068 | |
Tejun Heo | cf9a590 | 2009-01-29 20:31:35 +0900 | [diff] [blame] | 3069 | /* -EAGAIN from EH routine indicates retry without prejudice. |
| 3070 | * The requester is responsible for ensuring forward progress. |
| 3071 | */ |
| 3072 | if (err != -EAGAIN) |
| 3073 | ehc->tries[dev->devno]--; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3074 | |
| 3075 | switch (err) { |
| 3076 | case -ENODEV: |
| 3077 | /* device missing or wrong IDENTIFY data, schedule probing */ |
| 3078 | ehc->i.probe_mask |= (1 << dev->devno); |
| 3079 | case -EINVAL: |
| 3080 | /* give it just one more chance */ |
| 3081 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); |
| 3082 | case -EIO: |
Tejun Heo | d89293a | 2009-01-29 20:31:29 +0900 | [diff] [blame] | 3083 | if (ehc->tries[dev->devno] == 1) { |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3084 | /* This is the last chance, better to slow |
| 3085 | * down than lose it. |
| 3086 | */ |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 3087 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
Tejun Heo | d89293a | 2009-01-29 20:31:29 +0900 | [diff] [blame] | 3088 | if (dev->pio_mode > XFER_PIO_0) |
| 3089 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3090 | } |
| 3091 | } |
| 3092 | |
| 3093 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { |
| 3094 | /* disable device if it has used up all its chances */ |
| 3095 | ata_dev_disable(dev); |
| 3096 | |
| 3097 | /* detach if offline */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 3098 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3099 | ata_eh_detach_dev(dev); |
| 3100 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3101 | /* schedule probe if necessary */ |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 3102 | if (ata_eh_schedule_probe(dev)) { |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3103 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 3104 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
| 3105 | sizeof(ehc->cmd_timeout_idx[dev->devno])); |
| 3106 | } |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3107 | |
| 3108 | return 1; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3109 | } else { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 3110 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3111 | return 0; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3112 | } |
| 3113 | } |
| 3114 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3115 | /** |
| 3116 | * ata_eh_recover - recover host port after error |
| 3117 | * @ap: host port to recover |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3118 | * @prereset: prereset method (can be NULL) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3119 | * @softreset: softreset method (can be NULL) |
| 3120 | * @hardreset: hardreset method (can be NULL) |
| 3121 | * @postreset: postreset method (can be NULL) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3122 | * @r_failed_link: out parameter for failed link |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3123 | * |
| 3124 | * This is the alpha and omega, eum and yang, heart and soul of |
| 3125 | * libata exception handling. On entry, actions required to |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3126 | * recover each link and hotplug requests are recorded in the |
| 3127 | * link's eh_context. This function executes all the operations |
| 3128 | * with appropriate retrials and fallbacks to resurrect failed |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3129 | * devices, detach goners and greet newcomers. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3130 | * |
| 3131 | * LOCKING: |
| 3132 | * Kernel thread context (may sleep). |
| 3133 | * |
| 3134 | * RETURNS: |
| 3135 | * 0 on success, -errno on failure. |
| 3136 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3137 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
| 3138 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
| 3139 | ata_postreset_fn_t postreset, |
| 3140 | struct ata_link **r_failed_link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3141 | { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3142 | struct ata_link *link; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3143 | struct ata_device *dev; |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 3144 | int nr_failed_devs; |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 3145 | int rc; |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3146 | unsigned long flags, deadline; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3147 | |
| 3148 | DPRINTK("ENTER\n"); |
| 3149 | |
| 3150 | /* prep for recovery */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3151 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3152 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3153 | |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 3154 | /* re-enable link? */ |
| 3155 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { |
| 3156 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); |
| 3157 | spin_lock_irqsave(ap->lock, flags); |
| 3158 | link->flags &= ~ATA_LFLAG_DISABLED; |
| 3159 | spin_unlock_irqrestore(ap->lock, flags); |
| 3160 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); |
| 3161 | } |
| 3162 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3163 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | fd995f7 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3164 | if (link->flags & ATA_LFLAG_NO_RETRY) |
| 3165 | ehc->tries[dev->devno] = 1; |
| 3166 | else |
| 3167 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
Tejun Heo | 79a55b7 | 2007-01-18 17:22:18 +0900 | [diff] [blame] | 3168 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3169 | /* collect port action mask recorded in dev actions */ |
| 3170 | ehc->i.action |= ehc->i.dev_action[dev->devno] & |
| 3171 | ~ATA_EH_PERDEV_MASK; |
| 3172 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3173 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3174 | /* process hotplug request */ |
| 3175 | if (dev->flags & ATA_DFLAG_DETACH) |
| 3176 | ata_eh_detach_dev(dev); |
| 3177 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3178 | /* schedule probe if necessary */ |
| 3179 | if (!ata_dev_enabled(dev)) |
| 3180 | ata_eh_schedule_probe(dev); |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3181 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3182 | } |
| 3183 | |
| 3184 | retry: |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3185 | rc = 0; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3186 | nr_failed_devs = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3187 | |
Tejun Heo | aeb2ecd | 2006-06-12 14:11:43 +0900 | [diff] [blame] | 3188 | /* if UNLOADING, finish immediately */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 3189 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
Tejun Heo | aeb2ecd | 2006-06-12 14:11:43 +0900 | [diff] [blame] | 3190 | goto out; |
| 3191 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3192 | /* prep for EH */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3193 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3194 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3195 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3196 | /* skip EH if possible. */ |
| 3197 | if (ata_eh_skip_recovery(link)) |
| 3198 | ehc->i.action = 0; |
| 3199 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3200 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3201 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
| 3202 | } |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3203 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3204 | /* reset */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3205 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 3206 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3207 | |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 3208 | if (!(ehc->i.action & ATA_EH_RESET)) |
| 3209 | continue; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3210 | |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 3211 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
| 3212 | prereset, softreset, hardreset, postreset); |
| 3213 | if (rc) { |
| 3214 | ata_link_printk(link, KERN_ERR, |
| 3215 | "reset failed, giving up\n"); |
| 3216 | goto out; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3217 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3218 | } |
| 3219 | |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3220 | do { |
| 3221 | unsigned long now; |
| 3222 | |
| 3223 | /* |
| 3224 | * clears ATA_EH_PARK in eh_info and resets |
| 3225 | * ap->park_req_pending |
| 3226 | */ |
| 3227 | ata_eh_pull_park_action(ap); |
| 3228 | |
| 3229 | deadline = jiffies; |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3230 | ata_for_each_link(link, ap, EDGE) { |
| 3231 | ata_for_each_dev(dev, link, ALL) { |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3232 | struct ata_eh_context *ehc = &link->eh_context; |
| 3233 | unsigned long tmp; |
| 3234 | |
| 3235 | if (dev->class != ATA_DEV_ATA) |
| 3236 | continue; |
| 3237 | if (!(ehc->i.dev_action[dev->devno] & |
| 3238 | ATA_EH_PARK)) |
| 3239 | continue; |
| 3240 | tmp = dev->unpark_deadline; |
| 3241 | if (time_before(deadline, tmp)) |
| 3242 | deadline = tmp; |
| 3243 | else if (time_before_eq(tmp, jiffies)) |
| 3244 | continue; |
| 3245 | if (ehc->unloaded_mask & (1 << dev->devno)) |
| 3246 | continue; |
| 3247 | |
| 3248 | ata_eh_park_issue_cmd(dev, 1); |
| 3249 | } |
| 3250 | } |
| 3251 | |
| 3252 | now = jiffies; |
| 3253 | if (time_before_eq(deadline, now)) |
| 3254 | break; |
| 3255 | |
| 3256 | deadline = wait_for_completion_timeout(&ap->park_req_pending, |
| 3257 | deadline - now); |
| 3258 | } while (deadline); |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3259 | ata_for_each_link(link, ap, EDGE) { |
| 3260 | ata_for_each_dev(dev, link, ALL) { |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3261 | if (!(link->eh_context.unloaded_mask & |
| 3262 | (1 << dev->devno))) |
| 3263 | continue; |
| 3264 | |
| 3265 | ata_eh_park_issue_cmd(dev, 0); |
| 3266 | ata_eh_done(link, dev, ATA_EH_PARK); |
| 3267 | } |
| 3268 | } |
| 3269 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3270 | /* the rest */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3271 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3272 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3273 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3274 | /* revalidate existing devices and attach new ones */ |
| 3275 | rc = ata_eh_revalidate_and_attach(link, &dev); |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3276 | if (rc) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3277 | goto dev_fail; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3278 | |
Tejun Heo | 633273a | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 3279 | /* if PMP got attached, return, pmp EH will take care of it */ |
| 3280 | if (link->device->class == ATA_DEV_PMP) { |
| 3281 | ehc->i.action = 0; |
| 3282 | return 0; |
| 3283 | } |
| 3284 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3285 | /* configure transfer mode if necessary */ |
| 3286 | if (ehc->i.flags & ATA_EHI_SETMODE) { |
| 3287 | rc = ata_set_mode(link, &dev); |
| 3288 | if (rc) |
| 3289 | goto dev_fail; |
| 3290 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
| 3291 | } |
| 3292 | |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3293 | /* If reset has been issued, clear UA to avoid |
| 3294 | * disrupting the current users of the device. |
| 3295 | */ |
| 3296 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3297 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3298 | if (dev->class != ATA_DEV_ATAPI) |
| 3299 | continue; |
| 3300 | rc = atapi_eh_clear_ua(dev); |
| 3301 | if (rc) |
| 3302 | goto dev_fail; |
| 3303 | } |
| 3304 | } |
| 3305 | |
| 3306 | /* configure link power saving */ |
Tejun Heo | 3ec25eb | 2008-03-27 18:37:14 +0900 | [diff] [blame] | 3307 | if (ehc->i.action & ATA_EH_LPM) |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3308 | ata_for_each_dev(dev, link, ALL) |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 3309 | ata_dev_enable_pm(dev, ap->pm_policy); |
| 3310 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3311 | /* this link is okay now */ |
| 3312 | ehc->i.flags = 0; |
| 3313 | continue; |
| 3314 | |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 3315 | dev_fail: |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3316 | nr_failed_devs++; |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 3317 | ata_eh_handle_dev_fail(dev, rc); |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3318 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 3319 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
| 3320 | /* PMP reset requires working host port. |
| 3321 | * Can't retry if it's frozen. |
| 3322 | */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 3323 | if (sata_pmp_attached(ap)) |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 3324 | goto out; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3325 | break; |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 3326 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3327 | } |
| 3328 | |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 3329 | if (nr_failed_devs) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3330 | goto retry; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3331 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3332 | out: |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3333 | if (rc && r_failed_link) |
| 3334 | *r_failed_link = link; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3335 | |
| 3336 | DPRINTK("EXIT, rc=%d\n", rc); |
| 3337 | return rc; |
| 3338 | } |
| 3339 | |
| 3340 | /** |
| 3341 | * ata_eh_finish - finish up EH |
| 3342 | * @ap: host port to finish EH for |
| 3343 | * |
| 3344 | * Recovery is complete. Clean up EH states and retry or finish |
| 3345 | * failed qcs. |
| 3346 | * |
| 3347 | * LOCKING: |
| 3348 | * None. |
| 3349 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3350 | void ata_eh_finish(struct ata_port *ap) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3351 | { |
| 3352 | int tag; |
| 3353 | |
| 3354 | /* retry or finish qcs */ |
| 3355 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 3356 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
| 3357 | |
| 3358 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
| 3359 | continue; |
| 3360 | |
| 3361 | if (qc->err_mask) { |
| 3362 | /* FIXME: Once EH migration is complete, |
| 3363 | * generate sense data in this function, |
| 3364 | * considering both err_mask and tf. |
| 3365 | */ |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 3366 | if (qc->flags & ATA_QCFLAG_RETRY) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3367 | ata_eh_qc_retry(qc); |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 3368 | else |
| 3369 | ata_eh_qc_complete(qc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3370 | } else { |
| 3371 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { |
| 3372 | ata_eh_qc_complete(qc); |
| 3373 | } else { |
| 3374 | /* feed zero TF to sense generation */ |
| 3375 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); |
| 3376 | ata_eh_qc_retry(qc); |
| 3377 | } |
| 3378 | } |
| 3379 | } |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3380 | |
| 3381 | /* make sure nr_active_links is zero after EH */ |
| 3382 | WARN_ON(ap->nr_active_links); |
| 3383 | ap->nr_active_links = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3384 | } |
| 3385 | |
| 3386 | /** |
| 3387 | * ata_do_eh - do standard error handling |
| 3388 | * @ap: host port to handle error for |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 3389 | * |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3390 | * @prereset: prereset method (can be NULL) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3391 | * @softreset: softreset method (can be NULL) |
| 3392 | * @hardreset: hardreset method (can be NULL) |
| 3393 | * @postreset: postreset method (can be NULL) |
| 3394 | * |
| 3395 | * Perform standard error handling sequence. |
| 3396 | * |
| 3397 | * LOCKING: |
| 3398 | * Kernel thread context (may sleep). |
| 3399 | */ |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3400 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
| 3401 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
| 3402 | ata_postreset_fn_t postreset) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3403 | { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3404 | struct ata_device *dev; |
| 3405 | int rc; |
| 3406 | |
| 3407 | ata_eh_autopsy(ap); |
| 3408 | ata_eh_report(ap); |
| 3409 | |
| 3410 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, |
| 3411 | NULL); |
| 3412 | if (rc) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3413 | ata_for_each_dev(dev, &ap->link, ALL) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3414 | ata_dev_disable(dev); |
| 3415 | } |
| 3416 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3417 | ata_eh_finish(ap); |
| 3418 | } |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3419 | |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 3420 | /** |
| 3421 | * ata_std_error_handler - standard error handler |
| 3422 | * @ap: host port to handle error for |
| 3423 | * |
| 3424 | * Standard error handler |
| 3425 | * |
| 3426 | * LOCKING: |
| 3427 | * Kernel thread context (may sleep). |
| 3428 | */ |
| 3429 | void ata_std_error_handler(struct ata_port *ap) |
| 3430 | { |
| 3431 | struct ata_port_operations *ops = ap->ops; |
| 3432 | ata_reset_fn_t hardreset = ops->hardreset; |
| 3433 | |
Tejun Heo | 57c9efd | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 3434 | /* ignore built-in hardreset if SCR access is not available */ |
| 3435 | if (ata_is_builtin_hardreset(hardreset) && !sata_scr_valid(&ap->link)) |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 3436 | hardreset = NULL; |
| 3437 | |
| 3438 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); |
| 3439 | } |
| 3440 | |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 3441 | #ifdef CONFIG_PM |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3442 | /** |
| 3443 | * ata_eh_handle_port_suspend - perform port suspend operation |
| 3444 | * @ap: port to suspend |
| 3445 | * |
| 3446 | * Suspend @ap. |
| 3447 | * |
| 3448 | * LOCKING: |
| 3449 | * Kernel thread context (may sleep). |
| 3450 | */ |
| 3451 | static void ata_eh_handle_port_suspend(struct ata_port *ap) |
| 3452 | { |
| 3453 | unsigned long flags; |
| 3454 | int rc = 0; |
| 3455 | |
| 3456 | /* are we suspending? */ |
| 3457 | spin_lock_irqsave(ap->lock, flags); |
| 3458 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || |
| 3459 | ap->pm_mesg.event == PM_EVENT_ON) { |
| 3460 | spin_unlock_irqrestore(ap->lock, flags); |
| 3461 | return; |
| 3462 | } |
| 3463 | spin_unlock_irqrestore(ap->lock, flags); |
| 3464 | |
| 3465 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); |
| 3466 | |
Tejun Heo | 64578a3 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3467 | /* tell ACPI we're suspending */ |
| 3468 | rc = ata_acpi_on_suspend(ap); |
| 3469 | if (rc) |
| 3470 | goto out; |
| 3471 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3472 | /* suspend */ |
| 3473 | ata_eh_freeze_port(ap); |
| 3474 | |
| 3475 | if (ap->ops->port_suspend) |
| 3476 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); |
| 3477 | |
Shaohua Li | bd3adca | 2007-11-02 09:32:38 +0800 | [diff] [blame] | 3478 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
Tejun Heo | 64578a3 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3479 | out: |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3480 | /* report result */ |
| 3481 | spin_lock_irqsave(ap->lock, flags); |
| 3482 | |
| 3483 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; |
| 3484 | if (rc == 0) |
| 3485 | ap->pflags |= ATA_PFLAG_SUSPENDED; |
Tejun Heo | 64578a3 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3486 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3487 | ata_port_schedule_eh(ap); |
| 3488 | |
| 3489 | if (ap->pm_result) { |
| 3490 | *ap->pm_result = rc; |
| 3491 | ap->pm_result = NULL; |
| 3492 | } |
| 3493 | |
| 3494 | spin_unlock_irqrestore(ap->lock, flags); |
| 3495 | |
| 3496 | return; |
| 3497 | } |
| 3498 | |
| 3499 | /** |
| 3500 | * ata_eh_handle_port_resume - perform port resume operation |
| 3501 | * @ap: port to resume |
| 3502 | * |
| 3503 | * Resume @ap. |
| 3504 | * |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3505 | * LOCKING: |
| 3506 | * Kernel thread context (may sleep). |
| 3507 | */ |
| 3508 | static void ata_eh_handle_port_resume(struct ata_port *ap) |
| 3509 | { |
Tejun Heo | 6f9c1ea | 2009-04-23 09:55:28 +0900 | [diff] [blame] | 3510 | struct ata_link *link; |
| 3511 | struct ata_device *dev; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3512 | unsigned long flags; |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 3513 | int rc = 0; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3514 | |
| 3515 | /* are we resuming? */ |
| 3516 | spin_lock_irqsave(ap->lock, flags); |
| 3517 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || |
| 3518 | ap->pm_mesg.event != PM_EVENT_ON) { |
| 3519 | spin_unlock_irqrestore(ap->lock, flags); |
| 3520 | return; |
| 3521 | } |
| 3522 | spin_unlock_irqrestore(ap->lock, flags); |
| 3523 | |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 3524 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3525 | |
Tejun Heo | 6f9c1ea | 2009-04-23 09:55:28 +0900 | [diff] [blame] | 3526 | /* |
| 3527 | * Error timestamps are in jiffies which doesn't run while |
| 3528 | * suspended and PHY events during resume isn't too uncommon. |
| 3529 | * When the two are combined, it can lead to unnecessary speed |
| 3530 | * downs if the machine is suspended and resumed repeatedly. |
| 3531 | * Clear error history. |
| 3532 | */ |
| 3533 | ata_for_each_link(link, ap, HOST_FIRST) |
| 3534 | ata_for_each_dev(dev, link, ALL) |
| 3535 | ata_ering_clear(&dev->ering); |
| 3536 | |
Shaohua Li | bd3adca | 2007-11-02 09:32:38 +0800 | [diff] [blame] | 3537 | ata_acpi_set_state(ap, PMSG_ON); |
| 3538 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3539 | if (ap->ops->port_resume) |
| 3540 | rc = ap->ops->port_resume(ap); |
| 3541 | |
Tejun Heo | 6746544 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3542 | /* tell ACPI that we're resuming */ |
| 3543 | ata_acpi_on_resume(ap); |
| 3544 | |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 3545 | /* report result */ |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3546 | spin_lock_irqsave(ap->lock, flags); |
| 3547 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); |
| 3548 | if (ap->pm_result) { |
| 3549 | *ap->pm_result = rc; |
| 3550 | ap->pm_result = NULL; |
| 3551 | } |
| 3552 | spin_unlock_irqrestore(ap->lock, flags); |
| 3553 | } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 3554 | #endif /* CONFIG_PM */ |