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> |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 43 | #include <scsi/scsi_dbg.h> |
Jeff Garzik | c6fd280 | 2006-08-10 07:31:37 -0400 | [diff] [blame] | 44 | #include "../scsi/scsi_transport_api.h" |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 45 | |
| 46 | #include <linux/libata.h> |
| 47 | |
| 48 | #include "libata.h" |
| 49 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 50 | enum { |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 51 | /* speed down verdicts */ |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 52 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
| 53 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), |
| 54 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 55 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 56 | |
| 57 | /* error flags */ |
| 58 | ATA_EFLAG_IS_IO = (1 << 0), |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 59 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 60 | ATA_EFLAG_OLD_ER = (1 << 31), |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 61 | |
| 62 | /* error categories */ |
| 63 | ATA_ECAT_NONE = 0, |
| 64 | ATA_ECAT_ATA_BUS = 1, |
| 65 | ATA_ECAT_TOUT_HSM = 2, |
| 66 | ATA_ECAT_UNK_DEV = 3, |
Tejun Heo | 75f9caf | 2008-01-03 01:21:14 +0900 | [diff] [blame] | 67 | ATA_ECAT_DUBIOUS_NONE = 4, |
| 68 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, |
| 69 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, |
| 70 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, |
| 71 | ATA_ECAT_NR = 8, |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 72 | |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 73 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
| 74 | |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 75 | /* always put at least this amount of time between resets */ |
| 76 | ATA_EH_RESET_COOL_DOWN = 5000, |
| 77 | |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 78 | /* Waiting in ->prereset can never be reliable. It's |
| 79 | * sometimes nice to wait there but it can't be depended upon; |
| 80 | * otherwise, we wouldn't be resetting. Just give it enough |
| 81 | * time for most drives to spin up. |
| 82 | */ |
| 83 | ATA_EH_PRERESET_TIMEOUT = 10000, |
| 84 | ATA_EH_FASTDRAIN_INTERVAL = 3000, |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 85 | |
| 86 | ATA_EH_UA_TRIES = 5, |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 87 | |
| 88 | /* probe speed down parameters, see ata_eh_schedule_probe() */ |
| 89 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ |
| 90 | ATA_EH_PROBE_TRIALS = 2, |
Tejun Heo | 31daabd | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 91 | }; |
| 92 | |
| 93 | /* The following table determines how we sequence resets. Each entry |
| 94 | * represents timeout for that try. The first try can be soft or |
| 95 | * hardreset. All others are hardreset if available. In most cases |
| 96 | * the first reset w/ 10sec timeout should succeed. Following entries |
| 97 | * are mostly for error handling, hotplug and retarded devices. |
| 98 | */ |
| 99 | static const unsigned long ata_eh_reset_timeouts[] = { |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 100 | 10000, /* most drives spin up by 10sec */ |
| 101 | 10000, /* > 99% working drives spin up before 20sec */ |
| 102 | 35000, /* give > 30 secs of idleness for retarded devices */ |
| 103 | 5000, /* and sweet one last chance */ |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 104 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
Tejun Heo | 31daabd | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 105 | }; |
| 106 | |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 107 | static const unsigned long ata_eh_identify_timeouts[] = { |
| 108 | 5000, /* covers > 99% of successes and not too boring on failures */ |
| 109 | 10000, /* combined time till here is enough even for media access */ |
| 110 | 30000, /* for true idiots */ |
| 111 | ULONG_MAX, |
| 112 | }; |
| 113 | |
Tejun Heo | 6013efd | 2009-11-19 15:36:45 +0900 | [diff] [blame] | 114 | static const unsigned long ata_eh_flush_timeouts[] = { |
| 115 | 15000, /* be generous with flush */ |
| 116 | 15000, /* ditto */ |
| 117 | 30000, /* and even more generous */ |
| 118 | ULONG_MAX, |
| 119 | }; |
| 120 | |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 121 | static const unsigned long ata_eh_other_timeouts[] = { |
| 122 | 5000, /* same rationale as identify timeout */ |
| 123 | 10000, /* ditto */ |
| 124 | /* but no merciful 30sec for other commands, it just isn't worth it */ |
| 125 | ULONG_MAX, |
| 126 | }; |
| 127 | |
| 128 | struct ata_eh_cmd_timeout_ent { |
| 129 | const u8 *commands; |
| 130 | const unsigned long *timeouts; |
| 131 | }; |
| 132 | |
| 133 | /* The following table determines timeouts to use for EH internal |
| 134 | * commands. Each table entry is a command class and matches the |
| 135 | * commands the entry applies to and the timeout table to use. |
| 136 | * |
| 137 | * On the retry after a command timed out, the next timeout value from |
| 138 | * the table is used. If the table doesn't contain further entries, |
| 139 | * the last value is used. |
| 140 | * |
| 141 | * ehc->cmd_timeout_idx keeps track of which timeout to use per |
| 142 | * command class, so if SET_FEATURES times out on the first try, the |
| 143 | * next try will use the second timeout value only for that class. |
| 144 | */ |
| 145 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } |
| 146 | static const struct ata_eh_cmd_timeout_ent |
| 147 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { |
| 148 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), |
| 149 | .timeouts = ata_eh_identify_timeouts, }, |
| 150 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), |
| 151 | .timeouts = ata_eh_other_timeouts, }, |
| 152 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), |
| 153 | .timeouts = ata_eh_other_timeouts, }, |
| 154 | { .commands = CMDS(ATA_CMD_SET_FEATURES), |
| 155 | .timeouts = ata_eh_other_timeouts, }, |
| 156 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), |
| 157 | .timeouts = ata_eh_other_timeouts, }, |
Tejun Heo | 6013efd | 2009-11-19 15:36:45 +0900 | [diff] [blame] | 158 | { .commands = CMDS(ATA_CMD_FLUSH, ATA_CMD_FLUSH_EXT), |
| 159 | .timeouts = ata_eh_flush_timeouts }, |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 160 | }; |
| 161 | #undef CMDS |
| 162 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 163 | static void __ata_port_freeze(struct ata_port *ap); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 164 | #ifdef CONFIG_PM |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 165 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
| 166 | static void ata_eh_handle_port_resume(struct ata_port *ap); |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 167 | #else /* CONFIG_PM */ |
| 168 | static void ata_eh_handle_port_suspend(struct ata_port *ap) |
| 169 | { } |
| 170 | |
| 171 | static void ata_eh_handle_port_resume(struct ata_port *ap) |
| 172 | { } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 173 | #endif /* CONFIG_PM */ |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 174 | |
Tejun Heo | b64bbc3 | 2007-07-16 14:29:39 +0900 | [diff] [blame] | 175 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
| 176 | va_list args) |
| 177 | { |
| 178 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, |
| 179 | ATA_EH_DESC_LEN - ehi->desc_len, |
| 180 | fmt, args); |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * __ata_ehi_push_desc - push error description without adding separator |
| 185 | * @ehi: target EHI |
| 186 | * @fmt: printf format string |
| 187 | * |
| 188 | * Format string according to @fmt and append it to @ehi->desc. |
| 189 | * |
| 190 | * LOCKING: |
| 191 | * spin_lock_irqsave(host lock) |
| 192 | */ |
| 193 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) |
| 194 | { |
| 195 | va_list args; |
| 196 | |
| 197 | va_start(args, fmt); |
| 198 | __ata_ehi_pushv_desc(ehi, fmt, args); |
| 199 | va_end(args); |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * ata_ehi_push_desc - push error description with separator |
| 204 | * @ehi: target EHI |
| 205 | * @fmt: printf format string |
| 206 | * |
| 207 | * Format string according to @fmt and append it to @ehi->desc. |
| 208 | * If @ehi->desc is not empty, ", " is added in-between. |
| 209 | * |
| 210 | * LOCKING: |
| 211 | * spin_lock_irqsave(host lock) |
| 212 | */ |
| 213 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) |
| 214 | { |
| 215 | va_list args; |
| 216 | |
| 217 | if (ehi->desc_len) |
| 218 | __ata_ehi_push_desc(ehi, ", "); |
| 219 | |
| 220 | va_start(args, fmt); |
| 221 | __ata_ehi_pushv_desc(ehi, fmt, args); |
| 222 | va_end(args); |
| 223 | } |
| 224 | |
| 225 | /** |
| 226 | * ata_ehi_clear_desc - clean error description |
| 227 | * @ehi: target EHI |
| 228 | * |
| 229 | * Clear @ehi->desc. |
| 230 | * |
| 231 | * LOCKING: |
| 232 | * spin_lock_irqsave(host lock) |
| 233 | */ |
| 234 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) |
| 235 | { |
| 236 | ehi->desc[0] = '\0'; |
| 237 | ehi->desc_len = 0; |
| 238 | } |
| 239 | |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 240 | /** |
| 241 | * ata_port_desc - append port description |
| 242 | * @ap: target ATA port |
| 243 | * @fmt: printf format string |
| 244 | * |
| 245 | * Format string according to @fmt and append it to port |
| 246 | * description. If port description is not empty, " " is added |
| 247 | * in-between. This function is to be used while initializing |
| 248 | * ata_host. The description is printed on host registration. |
| 249 | * |
| 250 | * LOCKING: |
| 251 | * None. |
| 252 | */ |
| 253 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) |
| 254 | { |
| 255 | va_list args; |
| 256 | |
| 257 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); |
| 258 | |
| 259 | if (ap->link.eh_info.desc_len) |
| 260 | __ata_ehi_push_desc(&ap->link.eh_info, " "); |
| 261 | |
| 262 | va_start(args, fmt); |
| 263 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); |
| 264 | va_end(args); |
| 265 | } |
| 266 | |
| 267 | #ifdef CONFIG_PCI |
| 268 | |
| 269 | /** |
| 270 | * ata_port_pbar_desc - append PCI BAR description |
| 271 | * @ap: target ATA port |
| 272 | * @bar: target PCI BAR |
| 273 | * @offset: offset into PCI BAR |
| 274 | * @name: name of the area |
| 275 | * |
| 276 | * If @offset is negative, this function formats a string which |
| 277 | * contains the name, address, size and type of the BAR and |
| 278 | * appends it to the port description. If @offset is zero or |
| 279 | * positive, only name and offsetted address is appended. |
| 280 | * |
| 281 | * LOCKING: |
| 282 | * None. |
| 283 | */ |
| 284 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, |
| 285 | const char *name) |
| 286 | { |
| 287 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
| 288 | char *type = ""; |
| 289 | unsigned long long start, len; |
| 290 | |
| 291 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) |
| 292 | type = "m"; |
| 293 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) |
| 294 | type = "i"; |
| 295 | |
| 296 | start = (unsigned long long)pci_resource_start(pdev, bar); |
| 297 | len = (unsigned long long)pci_resource_len(pdev, bar); |
| 298 | |
| 299 | if (offset < 0) |
| 300 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); |
| 301 | else |
Andrew Morton | e6a73ab | 2007-12-13 16:01:37 -0800 | [diff] [blame] | 302 | ata_port_desc(ap, "%s 0x%llx", name, |
| 303 | start + (unsigned long long)offset); |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | #endif /* CONFIG_PCI */ |
| 307 | |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 308 | static int ata_lookup_timeout_table(u8 cmd) |
| 309 | { |
| 310 | int i; |
| 311 | |
| 312 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { |
| 313 | const u8 *cur; |
| 314 | |
| 315 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) |
| 316 | if (*cur == cmd) |
| 317 | return i; |
| 318 | } |
| 319 | |
| 320 | return -1; |
| 321 | } |
| 322 | |
| 323 | /** |
| 324 | * ata_internal_cmd_timeout - determine timeout for an internal command |
| 325 | * @dev: target device |
| 326 | * @cmd: internal command to be issued |
| 327 | * |
| 328 | * Determine timeout for internal command @cmd for @dev. |
| 329 | * |
| 330 | * LOCKING: |
| 331 | * EH context. |
| 332 | * |
| 333 | * RETURNS: |
| 334 | * Determined timeout. |
| 335 | */ |
| 336 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) |
| 337 | { |
| 338 | struct ata_eh_context *ehc = &dev->link->eh_context; |
| 339 | int ent = ata_lookup_timeout_table(cmd); |
| 340 | int idx; |
| 341 | |
| 342 | if (ent < 0) |
| 343 | return ATA_EH_CMD_DFL_TIMEOUT; |
| 344 | |
| 345 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; |
| 346 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; |
| 347 | } |
| 348 | |
| 349 | /** |
| 350 | * ata_internal_cmd_timed_out - notification for internal command timeout |
| 351 | * @dev: target device |
| 352 | * @cmd: internal command which timed out |
| 353 | * |
| 354 | * Notify EH that internal command @cmd for @dev timed out. This |
| 355 | * function should be called only for commands whose timeouts are |
| 356 | * determined using ata_internal_cmd_timeout(). |
| 357 | * |
| 358 | * LOCKING: |
| 359 | * EH context. |
| 360 | */ |
| 361 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) |
| 362 | { |
| 363 | struct ata_eh_context *ehc = &dev->link->eh_context; |
| 364 | int ent = ata_lookup_timeout_table(cmd); |
| 365 | int idx; |
| 366 | |
| 367 | if (ent < 0) |
| 368 | return; |
| 369 | |
| 370 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; |
| 371 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) |
| 372 | ehc->cmd_timeout_idx[dev->devno][ent]++; |
| 373 | } |
| 374 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 375 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
Tejun Heo | 0c247c5 | 2006-05-15 20:58:19 +0900 | [diff] [blame] | 376 | unsigned int err_mask) |
| 377 | { |
| 378 | struct ata_ering_entry *ent; |
| 379 | |
| 380 | WARN_ON(!err_mask); |
| 381 | |
| 382 | ering->cursor++; |
| 383 | ering->cursor %= ATA_ERING_SIZE; |
| 384 | |
| 385 | ent = &ering->ring[ering->cursor]; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 386 | ent->eflags = eflags; |
Tejun Heo | 0c247c5 | 2006-05-15 20:58:19 +0900 | [diff] [blame] | 387 | ent->err_mask = err_mask; |
| 388 | ent->timestamp = get_jiffies_64(); |
| 389 | } |
| 390 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 391 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
| 392 | { |
| 393 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; |
| 394 | |
| 395 | if (ent->err_mask) |
| 396 | return ent; |
| 397 | return NULL; |
| 398 | } |
| 399 | |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 400 | int ata_ering_map(struct ata_ering *ering, |
| 401 | int (*map_fn)(struct ata_ering_entry *, void *), |
| 402 | void *arg) |
Tejun Heo | 0c247c5 | 2006-05-15 20:58:19 +0900 | [diff] [blame] | 403 | { |
| 404 | int idx, rc = 0; |
| 405 | struct ata_ering_entry *ent; |
| 406 | |
| 407 | idx = ering->cursor; |
| 408 | do { |
| 409 | ent = &ering->ring[idx]; |
| 410 | if (!ent->err_mask) |
| 411 | break; |
| 412 | rc = map_fn(ent, arg); |
| 413 | if (rc) |
| 414 | break; |
| 415 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; |
| 416 | } while (idx != ering->cursor); |
| 417 | |
| 418 | return rc; |
| 419 | } |
| 420 | |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 421 | int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg) |
| 422 | { |
| 423 | ent->eflags |= ATA_EFLAG_OLD_ER; |
| 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | static void ata_ering_clear(struct ata_ering *ering) |
| 428 | { |
| 429 | ata_ering_map(ering, ata_ering_clear_cb, NULL); |
| 430 | } |
| 431 | |
Tejun Heo | 64f65ca | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 432 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
| 433 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 434 | struct ata_eh_context *ehc = &dev->link->eh_context; |
Tejun Heo | 64f65ca | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 435 | |
| 436 | return ehc->i.action | ehc->i.dev_action[dev->devno]; |
| 437 | } |
| 438 | |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 439 | 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] | 440 | struct ata_eh_info *ehi, unsigned int action) |
| 441 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 442 | struct ata_device *tdev; |
Tejun Heo | af181c2 | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 443 | |
| 444 | if (!dev) { |
| 445 | ehi->action &= ~action; |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 446 | ata_for_each_dev(tdev, link, ALL) |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 447 | ehi->dev_action[tdev->devno] &= ~action; |
Tejun Heo | af181c2 | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 448 | } else { |
| 449 | /* doesn't make sense for port-wide EH actions */ |
| 450 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); |
| 451 | |
| 452 | /* break ehi->action into ehi->dev_action */ |
| 453 | if (ehi->action & action) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 454 | ata_for_each_dev(tdev, link, ALL) |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 455 | ehi->dev_action[tdev->devno] |= |
| 456 | ehi->action & action; |
Tejun Heo | af181c2 | 2006-06-24 20:30:18 +0900 | [diff] [blame] | 457 | ehi->action &= ~action; |
| 458 | } |
| 459 | |
| 460 | /* turn off the specified per-dev action */ |
| 461 | ehi->dev_action[dev->devno] &= ~action; |
| 462 | } |
| 463 | } |
| 464 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 465 | /** |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 466 | * ata_eh_acquire - acquire EH ownership |
| 467 | * @ap: ATA port to acquire EH ownership for |
| 468 | * |
| 469 | * Acquire EH ownership for @ap. This is the basic exclusion |
| 470 | * mechanism for ports sharing a host. Only one port hanging off |
| 471 | * the same host can claim the ownership of EH. |
| 472 | * |
| 473 | * LOCKING: |
| 474 | * EH context. |
| 475 | */ |
| 476 | void ata_eh_acquire(struct ata_port *ap) |
| 477 | { |
| 478 | mutex_lock(&ap->host->eh_mutex); |
| 479 | WARN_ON_ONCE(ap->host->eh_owner); |
| 480 | ap->host->eh_owner = current; |
| 481 | } |
| 482 | |
| 483 | /** |
| 484 | * ata_eh_release - release EH ownership |
| 485 | * @ap: ATA port to release EH ownership for |
| 486 | * |
| 487 | * Release EH ownership for @ap if the caller. The caller must |
| 488 | * have acquired EH ownership using ata_eh_acquire() previously. |
| 489 | * |
| 490 | * LOCKING: |
| 491 | * EH context. |
| 492 | */ |
| 493 | void ata_eh_release(struct ata_port *ap) |
| 494 | { |
| 495 | WARN_ON_ONCE(ap->host->eh_owner != current); |
| 496 | ap->host->eh_owner = NULL; |
| 497 | mutex_unlock(&ap->host->eh_mutex); |
| 498 | } |
| 499 | |
| 500 | /** |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 501 | * ata_scsi_timed_out - SCSI layer time out callback |
| 502 | * @cmd: timed out SCSI command |
| 503 | * |
| 504 | * Handles SCSI layer timeout. We race with normal completion of |
| 505 | * the qc for @cmd. If the qc is already gone, we lose and let |
| 506 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has |
| 507 | * timed out and EH should be invoked. Prevent ata_qc_complete() |
| 508 | * from finishing it by setting EH_SCHEDULED and return |
| 509 | * EH_NOT_HANDLED. |
| 510 | * |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 511 | * TODO: kill this function once old EH is gone. |
| 512 | * |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 513 | * LOCKING: |
| 514 | * Called from timer context |
| 515 | * |
| 516 | * RETURNS: |
| 517 | * EH_HANDLED or EH_NOT_HANDLED |
| 518 | */ |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 519 | 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] | 520 | { |
| 521 | struct Scsi_Host *host = cmd->device->host; |
Jeff Garzik | 35bb94b | 2006-04-11 13:12:34 -0400 | [diff] [blame] | 522 | struct ata_port *ap = ata_shost_to_port(host); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 523 | unsigned long flags; |
| 524 | struct ata_queued_cmd *qc; |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 525 | enum blk_eh_timer_return ret; |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 526 | |
| 527 | DPRINTK("ENTER\n"); |
| 528 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 529 | if (ap->ops->error_handler) { |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 530 | ret = BLK_EH_NOT_HANDLED; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 531 | goto out; |
| 532 | } |
| 533 | |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 534 | ret = BLK_EH_HANDLED; |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 535 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 536 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 537 | if (qc) { |
| 538 | WARN_ON(qc->scsicmd != cmd); |
| 539 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; |
| 540 | qc->err_mask |= AC_ERR_TIMEOUT; |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 541 | ret = BLK_EH_NOT_HANDLED; |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 542 | } |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 543 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 544 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 545 | out: |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 546 | DPRINTK("EXIT, ret=%d\n", ret); |
| 547 | return ret; |
| 548 | } |
| 549 | |
Tejun Heo | ece180d | 2008-11-03 20:04:37 +0900 | [diff] [blame] | 550 | static void ata_eh_unload(struct ata_port *ap) |
| 551 | { |
| 552 | struct ata_link *link; |
| 553 | struct ata_device *dev; |
| 554 | unsigned long flags; |
| 555 | |
| 556 | /* Restore SControl IPM and SPD for the next driver and |
| 557 | * disable attached devices. |
| 558 | */ |
| 559 | ata_for_each_link(link, ap, PMP_FIRST) { |
| 560 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); |
| 561 | ata_for_each_dev(dev, link, ALL) |
| 562 | ata_dev_disable(dev); |
| 563 | } |
| 564 | |
| 565 | /* freeze and set UNLOADED */ |
| 566 | spin_lock_irqsave(ap->lock, flags); |
| 567 | |
| 568 | ata_port_freeze(ap); /* won't be thawed */ |
| 569 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ |
| 570 | ap->pflags |= ATA_PFLAG_UNLOADED; |
| 571 | |
| 572 | spin_unlock_irqrestore(ap->lock, flags); |
| 573 | } |
| 574 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 575 | /** |
| 576 | * ata_scsi_error - SCSI layer error handler callback |
| 577 | * @host: SCSI host on which error occurred |
| 578 | * |
| 579 | * Handles SCSI-layer-thrown error events. |
| 580 | * |
| 581 | * LOCKING: |
| 582 | * Inherited from SCSI layer (none, can sleep) |
| 583 | * |
| 584 | * RETURNS: |
| 585 | * Zero. |
| 586 | */ |
Jeff Garzik | 381544b | 2006-04-11 13:04:39 -0400 | [diff] [blame] | 587 | void ata_scsi_error(struct Scsi_Host *host) |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 588 | { |
Jeff Garzik | 35bb94b | 2006-04-11 13:12:34 -0400 | [diff] [blame] | 589 | struct ata_port *ap = ata_shost_to_port(host); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 590 | unsigned long flags; |
James Bottomley | c34aeeb | 2011-01-23 08:31:14 -0600 | [diff] [blame] | 591 | LIST_HEAD(eh_work_q); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 592 | |
| 593 | DPRINTK("ENTER\n"); |
| 594 | |
James Bottomley | c34aeeb | 2011-01-23 08:31:14 -0600 | [diff] [blame] | 595 | spin_lock_irqsave(host->host_lock, flags); |
| 596 | list_splice_init(&host->eh_cmd_q, &eh_work_q); |
| 597 | spin_unlock_irqrestore(host->host_lock, flags); |
| 598 | |
James Bottomley | 0e0b494c | 2011-01-23 09:42:50 -0600 | [diff] [blame] | 599 | ata_scsi_cmd_error_handler(host, ap, &eh_work_q); |
| 600 | |
| 601 | /* If we timed raced normal completion and there is nothing to |
| 602 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ |
| 603 | ata_scsi_port_error_handler(host, ap); |
| 604 | |
| 605 | /* finish or retry handled scmd's and clean up */ |
| 606 | WARN_ON(host->host_failed || !list_empty(&eh_work_q)); |
| 607 | |
| 608 | DPRINTK("EXIT\n"); |
| 609 | } |
| 610 | |
| 611 | /** |
| 612 | * ata_scsi_cmd_error_handler - error callback for a list of commands |
| 613 | * @host: scsi host containing the port |
| 614 | * @ap: ATA port within the host |
| 615 | * @eh_work_q: list of commands to process |
| 616 | * |
| 617 | * process the given list of commands and return those finished to the |
| 618 | * ap->eh_done_q. This function is the first part of the libata error |
| 619 | * handler which processes a given list of failed commands. |
| 620 | */ |
| 621 | void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, |
| 622 | struct list_head *eh_work_q) |
| 623 | { |
| 624 | int i; |
| 625 | unsigned long flags; |
| 626 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 627 | /* make sure sff pio task is not running */ |
| 628 | ata_sff_flush_pio_task(ap); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 629 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 630 | /* synchronize with host lock and sort out timeouts */ |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 631 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 632 | /* For new EH, all qcs are finished in one of three ways - |
| 633 | * normal completion, error completion, and SCSI timeout. |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 634 | * Both completions can race against SCSI timeout. When normal |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 635 | * completion wins, the qc never reaches EH. When error |
| 636 | * completion wins, the qc has ATA_QCFLAG_FAILED set. |
| 637 | * |
| 638 | * When SCSI timeout wins, things are a bit more complex. |
| 639 | * Normal or error completion can occur after the timeout but |
| 640 | * before this point. In such cases, both types of |
| 641 | * completions are honored. A scmd is determined to have |
| 642 | * timed out iff its associated qc is active and not failed. |
| 643 | */ |
| 644 | if (ap->ops->error_handler) { |
| 645 | struct scsi_cmnd *scmd, *tmp; |
| 646 | int nr_timedout = 0; |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 647 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 648 | spin_lock_irqsave(ap->lock, flags); |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 649 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 650 | /* This must occur under the ap->lock as we don't want |
| 651 | a polled recovery to race the real interrupt handler |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 652 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 653 | The lost_interrupt handler checks for any completed but |
| 654 | non-notified command and completes much like an IRQ handler. |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 655 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 656 | We then fall into the error recovery code which will treat |
| 657 | this as if normal completion won the race */ |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 658 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 659 | if (ap->ops->lost_interrupt) |
| 660 | ap->ops->lost_interrupt(ap); |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 661 | |
James Bottomley | 0e0b494c | 2011-01-23 09:42:50 -0600 | [diff] [blame] | 662 | list_for_each_entry_safe(scmd, tmp, eh_work_q, eh_entry) { |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 663 | struct ata_queued_cmd *qc; |
| 664 | |
| 665 | for (i = 0; i < ATA_MAX_QUEUE; i++) { |
| 666 | qc = __ata_qc_from_tag(ap, i); |
| 667 | if (qc->flags & ATA_QCFLAG_ACTIVE && |
| 668 | qc->scsicmd == scmd) |
| 669 | break; |
| 670 | } |
| 671 | |
| 672 | if (i < ATA_MAX_QUEUE) { |
| 673 | /* the scmd has an associated qc */ |
| 674 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { |
| 675 | /* which hasn't failed yet, timeout */ |
| 676 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 677 | qc->flags |= ATA_QCFLAG_FAILED; |
| 678 | nr_timedout++; |
| 679 | } |
| 680 | } else { |
| 681 | /* Normal completion occurred after |
| 682 | * SCSI timeout but before this point. |
| 683 | * Successfully complete it. |
| 684 | */ |
| 685 | scmd->retries = scmd->allowed; |
| 686 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | /* If we have timed out qcs. They belong to EH from |
| 691 | * this point but the state of the controller is |
| 692 | * unknown. Freeze the port to make sure the IRQ |
| 693 | * handler doesn't diddle with those qcs. This must |
| 694 | * be done atomically w.r.t. setting QCFLAG_FAILED. |
| 695 | */ |
| 696 | if (nr_timedout) |
| 697 | __ata_port_freeze(ap); |
| 698 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 699 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 700 | |
| 701 | /* initialize eh_tries */ |
| 702 | ap->eh_tries = ATA_EH_MAX_TRIES; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 703 | } else |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 704 | spin_unlock_wait(ap->lock); |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 705 | |
James Bottomley | 0e0b494c | 2011-01-23 09:42:50 -0600 | [diff] [blame] | 706 | } |
| 707 | EXPORT_SYMBOL(ata_scsi_cmd_error_handler); |
| 708 | |
| 709 | /** |
| 710 | * ata_scsi_port_error_handler - recover the port after the commands |
| 711 | * @host: SCSI host containing the port |
| 712 | * @ap: the ATA port |
| 713 | * |
| 714 | * Handle the recovery of the port @ap after all the commands |
| 715 | * have been recovered. |
| 716 | */ |
| 717 | void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap) |
| 718 | { |
| 719 | unsigned long flags; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 720 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 721 | /* invoke error handler */ |
| 722 | if (ap->ops->error_handler) { |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 723 | struct ata_link *link; |
| 724 | |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 725 | /* acquire EH ownership */ |
| 726 | ata_eh_acquire(ap); |
| 727 | repeat: |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 728 | /* kill fast drain timer */ |
| 729 | del_timer_sync(&ap->fastdrain_timer); |
| 730 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 731 | /* process port resume request */ |
| 732 | ata_eh_handle_port_resume(ap); |
| 733 | |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 734 | /* fetch & clear EH info */ |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 735 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 736 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 737 | ata_for_each_link(link, ap, HOST_FIRST) { |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 738 | struct ata_eh_context *ehc = &link->eh_context; |
| 739 | struct ata_device *dev; |
| 740 | |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 741 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
| 742 | link->eh_context.i = link->eh_info; |
| 743 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 744 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 745 | ata_for_each_dev(dev, link, ENABLED) { |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 746 | int devno = dev->devno; |
| 747 | |
| 748 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; |
| 749 | if (ata_ncq_enabled(dev)) |
| 750 | ehc->saved_ncq_enabled |= 1 << devno; |
| 751 | } |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 752 | } |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 753 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 754 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
| 755 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 756 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 757 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 758 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 759 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 760 | /* invoke EH, skip if unloading or suspended */ |
| 761 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 762 | ap->ops->error_handler(ap); |
Tejun Heo | ece180d | 2008-11-03 20:04:37 +0900 | [diff] [blame] | 763 | else { |
| 764 | /* if unloading, commence suicide */ |
| 765 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && |
| 766 | !(ap->pflags & ATA_PFLAG_UNLOADED)) |
| 767 | ata_eh_unload(ap); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 768 | ata_eh_finish(ap); |
Tejun Heo | ece180d | 2008-11-03 20:04:37 +0900 | [diff] [blame] | 769 | } |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 770 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 771 | /* process port suspend request */ |
| 772 | ata_eh_handle_port_suspend(ap); |
| 773 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 774 | /* Exception might have happened after ->error_handler |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 775 | * recovered the port but before this point. Repeat |
| 776 | * EH in such case. |
| 777 | */ |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 778 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 779 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 780 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 781 | if (--ap->eh_tries) { |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 782 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 783 | goto repeat; |
| 784 | } |
| 785 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 786 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
Tejun Heo | 914616a | 2007-06-25 21:47:11 +0900 | [diff] [blame] | 787 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 788 | } |
| 789 | |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 790 | /* this run is complete, make sure EH info is clear */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 791 | ata_for_each_link(link, ap, HOST_FIRST) |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 792 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 793 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 794 | /* Clear host_eh_scheduled while holding ap->lock such |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 795 | * that if exception occurs after this point but |
| 796 | * before EH completion, SCSI midlayer will |
| 797 | * re-initiate EH. |
| 798 | */ |
| 799 | host->host_eh_scheduled = 0; |
| 800 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 801 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 802 | ata_eh_release(ap); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 803 | } else { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 804 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 805 | ap->ops->eng_timeout(ap); |
| 806 | } |
| 807 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 808 | scsi_eh_flush_done_q(&ap->eh_done_q); |
| 809 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 810 | /* clean up */ |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 811 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 812 | |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 813 | if (ap->pflags & ATA_PFLAG_LOADING) |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 814 | ap->pflags &= ~ATA_PFLAG_LOADING; |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 815 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
Tejun Heo | ad72cf9 | 2010-07-02 10:03:52 +0200 | [diff] [blame] | 816 | schedule_delayed_work(&ap->hotplug_task, 0); |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 817 | |
| 818 | if (ap->pflags & ATA_PFLAG_RECOVERED) |
| 819 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); |
Tejun Heo | 580b210 | 2006-05-31 18:28:05 +0900 | [diff] [blame] | 820 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 821 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 822 | |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 823 | /* tell wait_eh that we're done */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 824 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 825 | wake_up_all(&ap->eh_wait_q); |
| 826 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 827 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 828 | } |
James Bottomley | 0e0b494c | 2011-01-23 09:42:50 -0600 | [diff] [blame] | 829 | EXPORT_SYMBOL_GPL(ata_scsi_port_error_handler); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 830 | |
| 831 | /** |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 832 | * ata_port_wait_eh - Wait for the currently pending EH to complete |
| 833 | * @ap: Port to wait EH for |
| 834 | * |
| 835 | * Wait until the currently pending EH is complete. |
| 836 | * |
| 837 | * LOCKING: |
| 838 | * Kernel thread context (may sleep). |
| 839 | */ |
| 840 | void ata_port_wait_eh(struct ata_port *ap) |
| 841 | { |
| 842 | unsigned long flags; |
| 843 | DEFINE_WAIT(wait); |
| 844 | |
| 845 | retry: |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 846 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 847 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 848 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 849 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 850 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 851 | schedule(); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 852 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 853 | } |
Tejun Heo | 0a1b622 | 2006-06-11 11:01:38 +0900 | [diff] [blame] | 854 | finish_wait(&ap->eh_wait_q, &wait); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 855 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 856 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 857 | |
| 858 | /* make sure SCSI EH is complete */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 859 | if (scsi_host_in_recovery(ap->scsi_host)) { |
Tejun Heo | 97750ce | 2010-09-06 17:56:29 +0200 | [diff] [blame] | 860 | ata_msleep(ap, 10); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 861 | goto retry; |
| 862 | } |
| 863 | } |
| 864 | |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 865 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
| 866 | { |
| 867 | unsigned int tag; |
| 868 | int nr = 0; |
| 869 | |
| 870 | /* count only non-internal commands */ |
| 871 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) |
| 872 | if (ata_qc_from_tag(ap, tag)) |
| 873 | nr++; |
| 874 | |
| 875 | return nr; |
| 876 | } |
| 877 | |
| 878 | void ata_eh_fastdrain_timerfn(unsigned long arg) |
| 879 | { |
| 880 | struct ata_port *ap = (void *)arg; |
| 881 | unsigned long flags; |
| 882 | int cnt; |
| 883 | |
| 884 | spin_lock_irqsave(ap->lock, flags); |
| 885 | |
| 886 | cnt = ata_eh_nr_in_flight(ap); |
| 887 | |
| 888 | /* are we done? */ |
| 889 | if (!cnt) |
| 890 | goto out_unlock; |
| 891 | |
| 892 | if (cnt == ap->fastdrain_cnt) { |
| 893 | unsigned int tag; |
| 894 | |
| 895 | /* No progress during the last interval, tag all |
| 896 | * in-flight qcs as timed out and freeze the port. |
| 897 | */ |
| 898 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { |
| 899 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); |
| 900 | if (qc) |
| 901 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 902 | } |
| 903 | |
| 904 | ata_port_freeze(ap); |
| 905 | } else { |
| 906 | /* some qcs have finished, give it another chance */ |
| 907 | ap->fastdrain_cnt = cnt; |
| 908 | ap->fastdrain_timer.expires = |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 909 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 910 | add_timer(&ap->fastdrain_timer); |
| 911 | } |
| 912 | |
| 913 | out_unlock: |
| 914 | spin_unlock_irqrestore(ap->lock, flags); |
| 915 | } |
| 916 | |
| 917 | /** |
| 918 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain |
| 919 | * @ap: target ATA port |
| 920 | * @fastdrain: activate fast drain |
| 921 | * |
| 922 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain |
| 923 | * is non-zero and EH wasn't pending before. Fast drain ensures |
| 924 | * that EH kicks in in timely manner. |
| 925 | * |
| 926 | * LOCKING: |
| 927 | * spin_lock_irqsave(host lock) |
| 928 | */ |
| 929 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) |
| 930 | { |
| 931 | int cnt; |
| 932 | |
| 933 | /* already scheduled? */ |
| 934 | if (ap->pflags & ATA_PFLAG_EH_PENDING) |
| 935 | return; |
| 936 | |
| 937 | ap->pflags |= ATA_PFLAG_EH_PENDING; |
| 938 | |
| 939 | if (!fastdrain) |
| 940 | return; |
| 941 | |
| 942 | /* do we have in-flight qcs? */ |
| 943 | cnt = ata_eh_nr_in_flight(ap); |
| 944 | if (!cnt) |
| 945 | return; |
| 946 | |
| 947 | /* activate fast drain */ |
| 948 | ap->fastdrain_cnt = cnt; |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 949 | ap->fastdrain_timer.expires = |
| 950 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 951 | add_timer(&ap->fastdrain_timer); |
| 952 | } |
| 953 | |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 954 | /** |
| 955 | * ata_qc_schedule_eh - schedule qc for error handling |
| 956 | * @qc: command to schedule error handling for |
| 957 | * |
| 958 | * Schedule error handling for @qc. EH will kick in as soon as |
| 959 | * other commands are drained. |
| 960 | * |
| 961 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 962 | * spin_lock_irqsave(host lock) |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 963 | */ |
| 964 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) |
| 965 | { |
| 966 | struct ata_port *ap = qc->ap; |
Tejun Heo | fa41efd | 2010-04-15 08:57:37 +0900 | [diff] [blame] | 967 | struct request_queue *q = qc->scsicmd->device->request_queue; |
| 968 | unsigned long flags; |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 969 | |
| 970 | WARN_ON(!ap->ops->error_handler); |
| 971 | |
| 972 | qc->flags |= ATA_QCFLAG_FAILED; |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 973 | ata_eh_set_pending(ap, 1); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 974 | |
| 975 | /* The following will fail if timeout has already expired. |
| 976 | * ata_scsi_error() takes care of such scmds on EH entry. |
| 977 | * Note that ATA_QCFLAG_FAILED is unconditionally set after |
| 978 | * this function completes. |
| 979 | */ |
Tejun Heo | fa41efd | 2010-04-15 08:57:37 +0900 | [diff] [blame] | 980 | spin_lock_irqsave(q->queue_lock, flags); |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 981 | blk_abort_request(qc->scsicmd->request); |
Tejun Heo | fa41efd | 2010-04-15 08:57:37 +0900 | [diff] [blame] | 982 | spin_unlock_irqrestore(q->queue_lock, flags); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 983 | } |
| 984 | |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 985 | /** |
| 986 | * ata_port_schedule_eh - schedule error handling without a qc |
| 987 | * @ap: ATA port to schedule EH for |
| 988 | * |
| 989 | * Schedule error handling for @ap. EH will kick in as soon as |
| 990 | * all commands are drained. |
| 991 | * |
| 992 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 993 | * spin_lock_irqsave(host lock) |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 994 | */ |
| 995 | void ata_port_schedule_eh(struct ata_port *ap) |
| 996 | { |
| 997 | WARN_ON(!ap->ops->error_handler); |
| 998 | |
Tejun Heo | f4d6d00 | 2007-05-01 11:50:15 +0200 | [diff] [blame] | 999 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
| 1000 | return; |
| 1001 | |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 1002 | ata_eh_set_pending(ap, 1); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 1003 | scsi_schedule_eh(ap->scsi_host); |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 1004 | |
| 1005 | DPRINTK("port EH scheduled\n"); |
| 1006 | } |
| 1007 | |
Tejun Heo | dbd8261 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1008 | 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] | 1009 | { |
| 1010 | int tag, nr_aborted = 0; |
| 1011 | |
| 1012 | WARN_ON(!ap->ops->error_handler); |
| 1013 | |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 1014 | /* we're gonna abort all commands, no need for fast drain */ |
| 1015 | ata_eh_set_pending(ap, 0); |
| 1016 | |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 1017 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 1018 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); |
| 1019 | |
Tejun Heo | dbd8261 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1020 | if (qc && (!link || qc->dev->link == link)) { |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 1021 | qc->flags |= ATA_QCFLAG_FAILED; |
| 1022 | ata_qc_complete(qc); |
| 1023 | nr_aborted++; |
| 1024 | } |
| 1025 | } |
| 1026 | |
| 1027 | if (!nr_aborted) |
| 1028 | ata_port_schedule_eh(ap); |
| 1029 | |
| 1030 | return nr_aborted; |
| 1031 | } |
| 1032 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1033 | /** |
Tejun Heo | dbd8261 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1034 | * ata_link_abort - abort all qc's on the link |
| 1035 | * @link: ATA link to abort qc's for |
| 1036 | * |
| 1037 | * Abort all active qc's active on @link and schedule EH. |
| 1038 | * |
| 1039 | * LOCKING: |
| 1040 | * spin_lock_irqsave(host lock) |
| 1041 | * |
| 1042 | * RETURNS: |
| 1043 | * Number of aborted qc's. |
| 1044 | */ |
| 1045 | int ata_link_abort(struct ata_link *link) |
| 1046 | { |
| 1047 | return ata_do_link_abort(link->ap, link); |
| 1048 | } |
| 1049 | |
| 1050 | /** |
| 1051 | * ata_port_abort - abort all qc's on the port |
| 1052 | * @ap: ATA port to abort qc's for |
| 1053 | * |
| 1054 | * Abort all active qc's of @ap and schedule EH. |
| 1055 | * |
| 1056 | * LOCKING: |
| 1057 | * spin_lock_irqsave(host_set lock) |
| 1058 | * |
| 1059 | * RETURNS: |
| 1060 | * Number of aborted qc's. |
| 1061 | */ |
| 1062 | int ata_port_abort(struct ata_port *ap) |
| 1063 | { |
| 1064 | return ata_do_link_abort(ap, NULL); |
| 1065 | } |
| 1066 | |
| 1067 | /** |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1068 | * __ata_port_freeze - freeze port |
| 1069 | * @ap: ATA port to freeze |
| 1070 | * |
| 1071 | * This function is called when HSM violation or some other |
| 1072 | * condition disrupts normal operation of the port. Frozen port |
| 1073 | * is not allowed to perform any operation until the port is |
| 1074 | * thawed, which usually follows a successful reset. |
| 1075 | * |
| 1076 | * ap->ops->freeze() callback can be used for freezing the port |
| 1077 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a |
| 1078 | * port cannot be frozen hardware-wise, the interrupt handler |
| 1079 | * must ack and clear interrupts unconditionally while the port |
| 1080 | * is frozen. |
| 1081 | * |
| 1082 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 1083 | * spin_lock_irqsave(host lock) |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1084 | */ |
| 1085 | static void __ata_port_freeze(struct ata_port *ap) |
| 1086 | { |
| 1087 | WARN_ON(!ap->ops->error_handler); |
| 1088 | |
| 1089 | if (ap->ops->freeze) |
| 1090 | ap->ops->freeze(ap); |
| 1091 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1092 | ap->pflags |= ATA_PFLAG_FROZEN; |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1093 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1094 | DPRINTK("ata%u port frozen\n", ap->print_id); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1095 | } |
| 1096 | |
| 1097 | /** |
| 1098 | * ata_port_freeze - abort & freeze port |
| 1099 | * @ap: ATA port to freeze |
| 1100 | * |
Jeff Garzik | 54c3844 | 2009-04-07 19:13:15 -0400 | [diff] [blame] | 1101 | * Abort and freeze @ap. The freeze operation must be called |
| 1102 | * first, because some hardware requires special operations |
| 1103 | * before the taskfile registers are accessible. |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1104 | * |
| 1105 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 1106 | * spin_lock_irqsave(host lock) |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1107 | * |
| 1108 | * RETURNS: |
| 1109 | * Number of aborted commands. |
| 1110 | */ |
| 1111 | int ata_port_freeze(struct ata_port *ap) |
| 1112 | { |
| 1113 | int nr_aborted; |
| 1114 | |
| 1115 | WARN_ON(!ap->ops->error_handler); |
| 1116 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1117 | __ata_port_freeze(ap); |
Jeff Garzik | 54c3844 | 2009-04-07 19:13:15 -0400 | [diff] [blame] | 1118 | nr_aborted = ata_port_abort(ap); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1119 | |
| 1120 | return nr_aborted; |
| 1121 | } |
| 1122 | |
| 1123 | /** |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1124 | * sata_async_notification - SATA async notification handler |
| 1125 | * @ap: ATA port where async notification is received |
| 1126 | * |
| 1127 | * Handler to be called when async notification via SDB FIS is |
| 1128 | * received. This function schedules EH if necessary. |
| 1129 | * |
| 1130 | * LOCKING: |
| 1131 | * spin_lock_irqsave(host lock) |
| 1132 | * |
| 1133 | * RETURNS: |
| 1134 | * 1 if EH is scheduled, 0 otherwise. |
| 1135 | */ |
| 1136 | int sata_async_notification(struct ata_port *ap) |
| 1137 | { |
| 1138 | u32 sntf; |
| 1139 | int rc; |
| 1140 | |
| 1141 | if (!(ap->flags & ATA_FLAG_AN)) |
| 1142 | return 0; |
| 1143 | |
| 1144 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); |
| 1145 | if (rc == 0) |
| 1146 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); |
| 1147 | |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 1148 | if (!sata_pmp_attached(ap) || rc) { |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1149 | /* PMP is not attached or SNTF is not available */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 1150 | if (!sata_pmp_attached(ap)) { |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1151 | /* PMP is not attached. Check whether ATAPI |
| 1152 | * AN is configured. If so, notify media |
| 1153 | * change. |
| 1154 | */ |
| 1155 | struct ata_device *dev = ap->link.device; |
| 1156 | |
| 1157 | if ((dev->class == ATA_DEV_ATAPI) && |
| 1158 | (dev->flags & ATA_DFLAG_AN)) |
| 1159 | ata_scsi_media_change_notify(dev); |
| 1160 | return 0; |
| 1161 | } else { |
| 1162 | /* PMP is attached but SNTF is not available. |
| 1163 | * ATAPI async media change notification is |
| 1164 | * not used. The PMP must be reporting PHY |
| 1165 | * status change, schedule EH. |
| 1166 | */ |
| 1167 | ata_port_schedule_eh(ap); |
| 1168 | return 1; |
| 1169 | } |
| 1170 | } else { |
| 1171 | /* PMP is attached and SNTF is available */ |
| 1172 | struct ata_link *link; |
| 1173 | |
| 1174 | /* check and notify ATAPI AN */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 1175 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1176 | if (!(sntf & (1 << link->pmp))) |
| 1177 | continue; |
| 1178 | |
| 1179 | if ((link->device->class == ATA_DEV_ATAPI) && |
| 1180 | (link->device->flags & ATA_DFLAG_AN)) |
| 1181 | ata_scsi_media_change_notify(link->device); |
| 1182 | } |
| 1183 | |
| 1184 | /* If PMP is reporting that PHY status of some |
| 1185 | * downstream ports has changed, schedule EH. |
| 1186 | */ |
| 1187 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { |
| 1188 | ata_port_schedule_eh(ap); |
| 1189 | return 1; |
| 1190 | } |
| 1191 | |
| 1192 | return 0; |
| 1193 | } |
| 1194 | } |
| 1195 | |
| 1196 | /** |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1197 | * ata_eh_freeze_port - EH helper to freeze port |
| 1198 | * @ap: ATA port to freeze |
| 1199 | * |
| 1200 | * Freeze @ap. |
| 1201 | * |
| 1202 | * LOCKING: |
| 1203 | * None. |
| 1204 | */ |
| 1205 | void ata_eh_freeze_port(struct ata_port *ap) |
| 1206 | { |
| 1207 | unsigned long flags; |
| 1208 | |
| 1209 | if (!ap->ops->error_handler) |
| 1210 | return; |
| 1211 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1212 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1213 | __ata_port_freeze(ap); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1214 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1215 | } |
| 1216 | |
| 1217 | /** |
| 1218 | * ata_port_thaw_port - EH helper to thaw port |
| 1219 | * @ap: ATA port to thaw |
| 1220 | * |
| 1221 | * Thaw frozen port @ap. |
| 1222 | * |
| 1223 | * LOCKING: |
| 1224 | * None. |
| 1225 | */ |
| 1226 | void ata_eh_thaw_port(struct ata_port *ap) |
| 1227 | { |
| 1228 | unsigned long flags; |
| 1229 | |
| 1230 | if (!ap->ops->error_handler) |
| 1231 | return; |
| 1232 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1233 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1234 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1235 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1236 | |
| 1237 | if (ap->ops->thaw) |
| 1238 | ap->ops->thaw(ap); |
| 1239 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1240 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1241 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1242 | DPRINTK("ata%u port thawed\n", ap->print_id); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1243 | } |
| 1244 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1245 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
| 1246 | { |
| 1247 | /* nada */ |
| 1248 | } |
| 1249 | |
| 1250 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) |
| 1251 | { |
| 1252 | struct ata_port *ap = qc->ap; |
| 1253 | struct scsi_cmnd *scmd = qc->scsicmd; |
| 1254 | unsigned long flags; |
| 1255 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1256 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1257 | qc->scsidone = ata_eh_scsidone; |
| 1258 | __ata_qc_complete(qc); |
| 1259 | WARN_ON(ata_tag_valid(qc->tag)); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1260 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1261 | |
| 1262 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); |
| 1263 | } |
| 1264 | |
| 1265 | /** |
| 1266 | * ata_eh_qc_complete - Complete an active ATA command from EH |
| 1267 | * @qc: Command to complete |
| 1268 | * |
| 1269 | * Indicate to the mid and upper layers that an ATA command has |
| 1270 | * completed. To be used from EH. |
| 1271 | */ |
| 1272 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) |
| 1273 | { |
| 1274 | struct scsi_cmnd *scmd = qc->scsicmd; |
| 1275 | scmd->retries = scmd->allowed; |
| 1276 | __ata_eh_qc_complete(qc); |
| 1277 | } |
| 1278 | |
| 1279 | /** |
| 1280 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH |
| 1281 | * @qc: Command to retry |
| 1282 | * |
| 1283 | * Indicate to the mid and upper layers that an ATA command |
| 1284 | * should be retried. To be used from EH. |
| 1285 | * |
| 1286 | * SCSI midlayer limits the number of retries to scmd->allowed. |
| 1287 | * scmd->retries is decremented for commands which get retried |
| 1288 | * due to unrelated failures (qc->err_mask is zero). |
| 1289 | */ |
| 1290 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) |
| 1291 | { |
| 1292 | struct scsi_cmnd *scmd = qc->scsicmd; |
| 1293 | if (!qc->err_mask && scmd->retries) |
| 1294 | scmd->retries--; |
| 1295 | __ata_eh_qc_complete(qc); |
| 1296 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1297 | |
| 1298 | /** |
Tejun Heo | 678afac | 2009-01-29 20:31:30 +0900 | [diff] [blame] | 1299 | * ata_dev_disable - disable ATA device |
| 1300 | * @dev: ATA device to disable |
| 1301 | * |
| 1302 | * Disable @dev. |
| 1303 | * |
| 1304 | * Locking: |
| 1305 | * EH context. |
| 1306 | */ |
| 1307 | void ata_dev_disable(struct ata_device *dev) |
| 1308 | { |
| 1309 | if (!ata_dev_enabled(dev)) |
| 1310 | return; |
| 1311 | |
| 1312 | if (ata_msg_drv(dev->link->ap)) |
| 1313 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
| 1314 | ata_acpi_on_disable(dev); |
| 1315 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); |
| 1316 | dev->class++; |
Tejun Heo | 99cf610 | 2009-01-29 20:31:32 +0900 | [diff] [blame] | 1317 | |
| 1318 | /* From now till the next successful probe, ering is used to |
| 1319 | * track probe failures. Clear accumulated device error info. |
| 1320 | */ |
| 1321 | ata_ering_clear(&dev->ering); |
Tejun Heo | 678afac | 2009-01-29 20:31:30 +0900 | [diff] [blame] | 1322 | } |
| 1323 | |
| 1324 | /** |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1325 | * ata_eh_detach_dev - detach ATA device |
| 1326 | * @dev: ATA device to detach |
| 1327 | * |
| 1328 | * Detach @dev. |
| 1329 | * |
| 1330 | * LOCKING: |
| 1331 | * None. |
| 1332 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1333 | void ata_eh_detach_dev(struct ata_device *dev) |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1334 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1335 | struct ata_link *link = dev->link; |
| 1336 | struct ata_port *ap = link->ap; |
Tejun Heo | 90484eb | 2008-10-26 15:43:03 +0900 | [diff] [blame] | 1337 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1338 | unsigned long flags; |
| 1339 | |
| 1340 | ata_dev_disable(dev); |
| 1341 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1342 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1343 | |
| 1344 | dev->flags &= ~ATA_DFLAG_DETACH; |
| 1345 | |
| 1346 | if (ata_scsi_offline_dev(dev)) { |
| 1347 | dev->flags |= ATA_DFLAG_DETACHED; |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1348 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1349 | } |
| 1350 | |
Tejun Heo | 90484eb | 2008-10-26 15:43:03 +0900 | [diff] [blame] | 1351 | /* clear per-dev EH info */ |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1352 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
| 1353 | 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] | 1354 | ehc->saved_xfer_mode[dev->devno] = 0; |
| 1355 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); |
Tejun Heo | beb07c1 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1356 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1357 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1358 | } |
| 1359 | |
| 1360 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1361 | * ata_eh_about_to_do - about to perform eh_action |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1362 | * @link: target ATA link |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1363 | * @dev: target ATA dev for per-dev action (can be NULL) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1364 | * @action: action about to be performed |
| 1365 | * |
| 1366 | * Called just before performing EH actions to clear related bits |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1367 | * in @link->eh_info such that eh actions are not unnecessarily |
| 1368 | * repeated. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1369 | * |
| 1370 | * LOCKING: |
| 1371 | * None. |
| 1372 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1373 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
| 1374 | unsigned int action) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1375 | { |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1376 | struct ata_port *ap = link->ap; |
| 1377 | struct ata_eh_info *ehi = &link->eh_info; |
| 1378 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1379 | unsigned long flags; |
| 1380 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1381 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 1382 | |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1383 | ata_eh_clear_action(link, dev, ehi, action); |
Tejun Heo | 13abf50 | 2006-07-10 23:18:46 +0900 | [diff] [blame] | 1384 | |
Tejun Heo | a568d1d | 2008-10-21 20:37:21 +0900 | [diff] [blame] | 1385 | /* About to take EH action, set RECOVERED. Ignore actions on |
| 1386 | * slave links as master will do them again. |
| 1387 | */ |
| 1388 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 1389 | ap->pflags |= ATA_PFLAG_RECOVERED; |
| 1390 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1391 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1392 | } |
| 1393 | |
| 1394 | /** |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1395 | * ata_eh_done - EH action complete |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1396 | * @ap: target ATA port |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1397 | * @dev: target ATA dev for per-dev action (can be NULL) |
| 1398 | * @action: action just completed |
| 1399 | * |
| 1400 | * Called right after performing EH actions to clear related bits |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1401 | * in @link->eh_context. |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1402 | * |
| 1403 | * LOCKING: |
| 1404 | * None. |
| 1405 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1406 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
| 1407 | unsigned int action) |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1408 | { |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1409 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1410 | |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1411 | ata_eh_clear_action(link, dev, &ehc->i, action); |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1412 | } |
| 1413 | |
| 1414 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1415 | * ata_err_string - convert err_mask to descriptive string |
| 1416 | * @err_mask: error mask to convert to string |
| 1417 | * |
| 1418 | * Convert @err_mask to descriptive string. Errors are |
| 1419 | * prioritized according to severity and only the most severe |
| 1420 | * error is reported. |
| 1421 | * |
| 1422 | * LOCKING: |
| 1423 | * None. |
| 1424 | * |
| 1425 | * RETURNS: |
| 1426 | * Descriptive string for @err_mask |
| 1427 | */ |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 1428 | static const char *ata_err_string(unsigned int err_mask) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1429 | { |
| 1430 | if (err_mask & AC_ERR_HOST_BUS) |
| 1431 | return "host bus error"; |
| 1432 | if (err_mask & AC_ERR_ATA_BUS) |
| 1433 | return "ATA bus error"; |
| 1434 | if (err_mask & AC_ERR_TIMEOUT) |
| 1435 | return "timeout"; |
| 1436 | if (err_mask & AC_ERR_HSM) |
| 1437 | return "HSM violation"; |
| 1438 | if (err_mask & AC_ERR_SYSTEM) |
| 1439 | return "internal error"; |
| 1440 | if (err_mask & AC_ERR_MEDIA) |
| 1441 | return "media error"; |
| 1442 | if (err_mask & AC_ERR_INVALID) |
| 1443 | return "invalid argument"; |
| 1444 | if (err_mask & AC_ERR_DEV) |
| 1445 | return "device error"; |
| 1446 | return "unknown error"; |
| 1447 | } |
| 1448 | |
| 1449 | /** |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1450 | * ata_read_log_page - read a specific log page |
| 1451 | * @dev: target device |
| 1452 | * @page: page to read |
| 1453 | * @buf: buffer to store read page |
| 1454 | * @sectors: number of sectors to read |
| 1455 | * |
| 1456 | * Read log page using READ_LOG_EXT command. |
| 1457 | * |
| 1458 | * LOCKING: |
| 1459 | * Kernel thread context (may sleep). |
| 1460 | * |
| 1461 | * RETURNS: |
| 1462 | * 0 on success, AC_ERR_* mask otherwise. |
| 1463 | */ |
| 1464 | static unsigned int ata_read_log_page(struct ata_device *dev, |
| 1465 | u8 page, void *buf, unsigned int sectors) |
| 1466 | { |
| 1467 | struct ata_taskfile tf; |
| 1468 | unsigned int err_mask; |
| 1469 | |
| 1470 | DPRINTK("read log page - page %d\n", page); |
| 1471 | |
| 1472 | ata_tf_init(dev, &tf); |
| 1473 | tf.command = ATA_CMD_READ_LOG_EXT; |
| 1474 | tf.lbal = page; |
| 1475 | tf.nsect = sectors; |
| 1476 | tf.hob_nsect = sectors >> 8; |
| 1477 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; |
| 1478 | tf.protocol = ATA_PROT_PIO; |
| 1479 | |
| 1480 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1481 | buf, sectors * ATA_SECT_SIZE, 0); |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1482 | |
| 1483 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| 1484 | return err_mask; |
| 1485 | } |
| 1486 | |
| 1487 | /** |
| 1488 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details |
| 1489 | * @dev: Device to read log page 10h from |
| 1490 | * @tag: Resulting tag of the failed command |
| 1491 | * @tf: Resulting taskfile registers of the failed command |
| 1492 | * |
| 1493 | * Read log page 10h to obtain NCQ error details and clear error |
| 1494 | * condition. |
| 1495 | * |
| 1496 | * LOCKING: |
| 1497 | * Kernel thread context (may sleep). |
| 1498 | * |
| 1499 | * RETURNS: |
| 1500 | * 0 on success, -errno otherwise. |
| 1501 | */ |
| 1502 | static int ata_eh_read_log_10h(struct ata_device *dev, |
| 1503 | int *tag, struct ata_taskfile *tf) |
| 1504 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1505 | u8 *buf = dev->link->ap->sector_buf; |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1506 | unsigned int err_mask; |
| 1507 | u8 csum; |
| 1508 | int i; |
| 1509 | |
| 1510 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); |
| 1511 | if (err_mask) |
| 1512 | return -EIO; |
| 1513 | |
| 1514 | csum = 0; |
| 1515 | for (i = 0; i < ATA_SECT_SIZE; i++) |
| 1516 | csum += buf[i]; |
| 1517 | if (csum) |
| 1518 | ata_dev_printk(dev, KERN_WARNING, |
| 1519 | "invalid checksum 0x%x on log page 10h\n", csum); |
| 1520 | |
| 1521 | if (buf[0] & 0x80) |
| 1522 | return -ENOENT; |
| 1523 | |
| 1524 | *tag = buf[0] & 0x1f; |
| 1525 | |
| 1526 | tf->command = buf[2]; |
| 1527 | tf->feature = buf[3]; |
| 1528 | tf->lbal = buf[4]; |
| 1529 | tf->lbam = buf[5]; |
| 1530 | tf->lbah = buf[6]; |
| 1531 | tf->device = buf[7]; |
| 1532 | tf->hob_lbal = buf[8]; |
| 1533 | tf->hob_lbam = buf[9]; |
| 1534 | tf->hob_lbah = buf[10]; |
| 1535 | tf->nsect = buf[12]; |
| 1536 | tf->hob_nsect = buf[13]; |
| 1537 | |
| 1538 | return 0; |
| 1539 | } |
| 1540 | |
| 1541 | /** |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 1542 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY |
| 1543 | * @dev: target ATAPI device |
| 1544 | * @r_sense_key: out parameter for sense_key |
| 1545 | * |
| 1546 | * Perform ATAPI TEST_UNIT_READY. |
| 1547 | * |
| 1548 | * LOCKING: |
| 1549 | * EH context (may sleep). |
| 1550 | * |
| 1551 | * RETURNS: |
| 1552 | * 0 on success, AC_ERR_* mask on failure. |
| 1553 | */ |
| 1554 | static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) |
| 1555 | { |
| 1556 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; |
| 1557 | struct ata_taskfile tf; |
| 1558 | unsigned int err_mask; |
| 1559 | |
| 1560 | ata_tf_init(dev, &tf); |
| 1561 | |
| 1562 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1563 | tf.command = ATA_CMD_PACKET; |
| 1564 | tf.protocol = ATAPI_PROT_NODATA; |
| 1565 | |
| 1566 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); |
| 1567 | if (err_mask == AC_ERR_DEV) |
| 1568 | *r_sense_key = tf.feature >> 4; |
| 1569 | return err_mask; |
| 1570 | } |
| 1571 | |
| 1572 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1573 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE |
| 1574 | * @dev: device to perform REQUEST_SENSE to |
| 1575 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1576 | * @dfl_sense_key: default sense key to use |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1577 | * |
| 1578 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK |
| 1579 | * SENSE. This function is EH helper. |
| 1580 | * |
| 1581 | * LOCKING: |
| 1582 | * Kernel thread context (may sleep). |
| 1583 | * |
| 1584 | * RETURNS: |
| 1585 | * 0 on success, AC_ERR_* mask on failure |
| 1586 | */ |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1587 | static unsigned int atapi_eh_request_sense(struct ata_device *dev, |
| 1588 | u8 *sense_buf, u8 dfl_sense_key) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1589 | { |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1590 | u8 cdb[ATAPI_CDB_LEN] = |
| 1591 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1592 | struct ata_port *ap = dev->link->ap; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1593 | struct ata_taskfile tf; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1594 | |
| 1595 | DPRINTK("ATAPI request sense\n"); |
| 1596 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1597 | /* FIXME: is this needed? */ |
| 1598 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
| 1599 | |
Albert Lee | 5628776 | 2007-04-02 11:30:46 +0800 | [diff] [blame] | 1600 | /* initialize sense_buf with the error register, |
| 1601 | * for the case where they are -not- overwritten |
| 1602 | */ |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1603 | sense_buf[0] = 0x70; |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1604 | sense_buf[2] = dfl_sense_key; |
Albert Lee | 5628776 | 2007-04-02 11:30:46 +0800 | [diff] [blame] | 1605 | |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 1606 | /* some devices time out if garbage left in tf */ |
Albert Lee | 5628776 | 2007-04-02 11:30:46 +0800 | [diff] [blame] | 1607 | ata_tf_init(dev, &tf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1608 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1609 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1610 | tf.command = ATA_CMD_PACKET; |
| 1611 | |
| 1612 | /* is it pointless to prefer PIO for "safety reasons"? */ |
| 1613 | if (ap->flags & ATA_FLAG_PIO_DMA) { |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 1614 | tf.protocol = ATAPI_PROT_DMA; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1615 | tf.feature |= ATAPI_PKT_DMA; |
| 1616 | } else { |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 1617 | tf.protocol = ATAPI_PROT_PIO; |
Tejun Heo | f2dfc1a | 2007-12-12 12:12:46 +0900 | [diff] [blame] | 1618 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
| 1619 | tf.lbah = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1620 | } |
| 1621 | |
| 1622 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1623 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1624 | } |
| 1625 | |
| 1626 | /** |
| 1627 | * ata_eh_analyze_serror - analyze SError for a failed port |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1628 | * @link: ATA link to analyze SError for |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1629 | * |
| 1630 | * Analyze SError if available and further determine cause of |
| 1631 | * failure. |
| 1632 | * |
| 1633 | * LOCKING: |
| 1634 | * None. |
| 1635 | */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1636 | static void ata_eh_analyze_serror(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1637 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1638 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1639 | u32 serror = ehc->i.serror; |
| 1640 | unsigned int err_mask = 0, action = 0; |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1641 | u32 hotplug_mask; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1642 | |
Tejun Heo | e0614db | 2008-05-19 01:15:09 +0900 | [diff] [blame] | 1643 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1644 | err_mask |= AC_ERR_ATA_BUS; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1645 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1646 | } |
| 1647 | if (serror & SERR_PROTOCOL) { |
| 1648 | err_mask |= AC_ERR_HSM; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1649 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1650 | } |
| 1651 | if (serror & SERR_INTERNAL) { |
| 1652 | err_mask |= AC_ERR_SYSTEM; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1653 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1654 | } |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1655 | |
| 1656 | /* Determine whether a hotplug event has occurred. Both |
| 1657 | * SError.N/X are considered hotplug events for enabled or |
| 1658 | * host links. For disabled PMP links, only N bit is |
| 1659 | * considered as X bit is left at 1 for link plugging. |
| 1660 | */ |
Tejun Heo | eb0e85e | 2011-02-24 19:30:37 +0100 | [diff] [blame] | 1661 | if (link->lpm_policy > ATA_LPM_MAX_POWER) |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 1662 | hotplug_mask = 0; /* hotplug doesn't work w/ LPM */ |
| 1663 | else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1664 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
| 1665 | else |
| 1666 | hotplug_mask = SERR_PHYRDY_CHG; |
| 1667 | |
| 1668 | if (serror & hotplug_mask) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 1669 | ata_ehi_hotplugged(&ehc->i); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1670 | |
| 1671 | ehc->i.err_mask |= err_mask; |
| 1672 | ehc->i.action |= action; |
| 1673 | } |
| 1674 | |
| 1675 | /** |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1676 | * ata_eh_analyze_ncq_error - analyze NCQ error |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1677 | * @link: ATA link to analyze NCQ error for |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1678 | * |
| 1679 | * Read log page 10h, determine the offending qc and acquire |
| 1680 | * error status TF. For NCQ device errors, all LLDDs have to do |
| 1681 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes |
| 1682 | * care of the rest. |
| 1683 | * |
| 1684 | * LOCKING: |
| 1685 | * Kernel thread context (may sleep). |
| 1686 | */ |
Mark Lord | 10acf3b | 2008-05-02 02:14:53 -0400 | [diff] [blame] | 1687 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1688 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1689 | struct ata_port *ap = link->ap; |
| 1690 | struct ata_eh_context *ehc = &link->eh_context; |
| 1691 | struct ata_device *dev = link->device; |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1692 | struct ata_queued_cmd *qc; |
| 1693 | struct ata_taskfile tf; |
| 1694 | int tag, rc; |
| 1695 | |
| 1696 | /* if frozen, we can't do much */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1697 | if (ap->pflags & ATA_PFLAG_FROZEN) |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1698 | return; |
| 1699 | |
| 1700 | /* is it NCQ device error? */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1701 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1702 | return; |
| 1703 | |
| 1704 | /* has LLDD analyzed already? */ |
| 1705 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 1706 | qc = __ata_qc_from_tag(ap, tag); |
| 1707 | |
| 1708 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
| 1709 | continue; |
| 1710 | |
| 1711 | if (qc->err_mask) |
| 1712 | return; |
| 1713 | } |
| 1714 | |
| 1715 | /* okay, this error is ours */ |
Jeff Garzik | a09bf4c | 2010-04-22 21:59:13 -0400 | [diff] [blame] | 1716 | memset(&tf, 0, sizeof(tf)); |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1717 | rc = ata_eh_read_log_10h(dev, &tag, &tf); |
| 1718 | if (rc) { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1719 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1720 | "(errno=%d)\n", rc); |
| 1721 | return; |
| 1722 | } |
| 1723 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1724 | if (!(link->sactive & (1 << tag))) { |
| 1725 | ata_link_printk(link, KERN_ERR, "log page 10h reported " |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1726 | "inactive tag %d\n", tag); |
| 1727 | return; |
| 1728 | } |
| 1729 | |
| 1730 | /* we've got the perpetrator, condemn it */ |
| 1731 | qc = __ata_qc_from_tag(ap, tag); |
| 1732 | memcpy(&qc->result_tf, &tf, sizeof(tf)); |
Mark Lord | a6116c9 | 2008-04-23 22:36:25 -0400 | [diff] [blame] | 1733 | 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] | 1734 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1735 | ehc->i.err_mask &= ~AC_ERR_DEV; |
| 1736 | } |
| 1737 | |
| 1738 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1739 | * ata_eh_analyze_tf - analyze taskfile of a failed qc |
| 1740 | * @qc: qc to analyze |
| 1741 | * @tf: Taskfile registers to analyze |
| 1742 | * |
| 1743 | * Analyze taskfile of @qc and further determine cause of |
| 1744 | * failure. This function also requests ATAPI sense data if |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1745 | * available. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1746 | * |
| 1747 | * LOCKING: |
| 1748 | * Kernel thread context (may sleep). |
| 1749 | * |
| 1750 | * RETURNS: |
| 1751 | * Determined recovery action |
| 1752 | */ |
| 1753 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, |
| 1754 | const struct ata_taskfile *tf) |
| 1755 | { |
| 1756 | unsigned int tmp, action = 0; |
| 1757 | u8 stat = tf->command, err = tf->feature; |
| 1758 | |
| 1759 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { |
| 1760 | qc->err_mask |= AC_ERR_HSM; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1761 | return ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1762 | } |
| 1763 | |
Tejun Heo | a51d644 | 2007-03-20 15:24:11 +0900 | [diff] [blame] | 1764 | if (stat & (ATA_ERR | ATA_DF)) |
| 1765 | qc->err_mask |= AC_ERR_DEV; |
| 1766 | else |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1767 | return 0; |
| 1768 | |
| 1769 | switch (qc->dev->class) { |
| 1770 | case ATA_DEV_ATA: |
| 1771 | if (err & ATA_ICRC) |
| 1772 | qc->err_mask |= AC_ERR_ATA_BUS; |
| 1773 | if (err & ATA_UNC) |
| 1774 | qc->err_mask |= AC_ERR_MEDIA; |
| 1775 | if (err & ATA_IDNF) |
| 1776 | qc->err_mask |= AC_ERR_INVALID; |
| 1777 | break; |
| 1778 | |
| 1779 | case ATA_DEV_ATAPI: |
Tejun Heo | a569a30 | 2006-11-21 10:40:51 +0900 | [diff] [blame] | 1780 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1781 | tmp = atapi_eh_request_sense(qc->dev, |
| 1782 | qc->scsicmd->sense_buffer, |
| 1783 | qc->result_tf.feature >> 4); |
Tejun Heo | a569a30 | 2006-11-21 10:40:51 +0900 | [diff] [blame] | 1784 | if (!tmp) { |
| 1785 | /* ATA_QCFLAG_SENSE_VALID is used to |
| 1786 | * tell atapi_qc_complete() that sense |
| 1787 | * data is already valid. |
| 1788 | * |
| 1789 | * TODO: interpret sense data and set |
| 1790 | * appropriate err_mask. |
| 1791 | */ |
| 1792 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
| 1793 | } else |
| 1794 | qc->err_mask |= tmp; |
| 1795 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1796 | } |
| 1797 | |
| 1798 | 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] | 1799 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1800 | |
| 1801 | return action; |
| 1802 | } |
| 1803 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1804 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
| 1805 | int *xfer_ok) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1806 | { |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1807 | int base = 0; |
| 1808 | |
| 1809 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) |
| 1810 | *xfer_ok = 1; |
| 1811 | |
| 1812 | if (!*xfer_ok) |
Tejun Heo | 75f9caf | 2008-01-03 01:21:14 +0900 | [diff] [blame] | 1813 | base = ATA_ECAT_DUBIOUS_NONE; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1814 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1815 | if (err_mask & AC_ERR_ATA_BUS) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1816 | return base + ATA_ECAT_ATA_BUS; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1817 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1818 | if (err_mask & AC_ERR_TIMEOUT) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1819 | return base + ATA_ECAT_TOUT_HSM; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1820 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1821 | if (eflags & ATA_EFLAG_IS_IO) { |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1822 | if (err_mask & AC_ERR_HSM) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1823 | return base + ATA_ECAT_TOUT_HSM; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1824 | if ((err_mask & |
| 1825 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1826 | return base + ATA_ECAT_UNK_DEV; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1827 | } |
| 1828 | |
| 1829 | return 0; |
| 1830 | } |
| 1831 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1832 | struct speed_down_verdict_arg { |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1833 | u64 since; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1834 | int xfer_ok; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1835 | int nr_errors[ATA_ECAT_NR]; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1836 | }; |
| 1837 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1838 | 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] | 1839 | { |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1840 | struct speed_down_verdict_arg *arg = void_arg; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1841 | int cat; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1842 | |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 1843 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since)) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1844 | return -1; |
| 1845 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1846 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
| 1847 | &arg->xfer_ok); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1848 | arg->nr_errors[cat]++; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1849 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1850 | return 0; |
| 1851 | } |
| 1852 | |
| 1853 | /** |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1854 | * ata_eh_speed_down_verdict - Determine speed down verdict |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1855 | * @dev: Device of interest |
| 1856 | * |
| 1857 | * This function examines error ring of @dev and determines |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1858 | * whether NCQ needs to be turned off, transfer speed should be |
| 1859 | * stepped down, or falling back to PIO is necessary. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1860 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1861 | * ECAT_ATA_BUS : ATA_BUS error for any command |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1862 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1863 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for |
| 1864 | * IO commands |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1865 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1866 | * ECAT_UNK_DEV : Unknown DEV error for IO commands |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1867 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1868 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
| 1869 | * data transfer hasn't been verified. |
| 1870 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1871 | * Verdicts are |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1872 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1873 | * NCQ_OFF : Turn off NCQ. |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1874 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1875 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
| 1876 | * to PIO. |
| 1877 | * |
| 1878 | * FALLBACK_TO_PIO : Fall back to PIO. |
| 1879 | * |
| 1880 | * Even if multiple verdicts are returned, only one action is |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1881 | * taken per error. An action triggered by non-DUBIOUS errors |
| 1882 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. |
| 1883 | * This is to expedite speed down decisions right after device is |
| 1884 | * initially configured. |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1885 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1886 | * The followings are speed down rules. #1 and #2 deal with |
| 1887 | * DUBIOUS errors. |
| 1888 | * |
| 1889 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
| 1890 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. |
| 1891 | * |
| 1892 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors |
| 1893 | * occurred during last 5 mins, NCQ_OFF. |
| 1894 | * |
| 1895 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1896 | * occurred during last 5 mins, FALLBACK_TO_PIO |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1897 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1898 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1899 | * during last 10 mins, NCQ_OFF. |
| 1900 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1901 | * 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] | 1902 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1903 | * |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1904 | * LOCKING: |
| 1905 | * Inherited from caller. |
| 1906 | * |
| 1907 | * RETURNS: |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1908 | * OR of ATA_EH_SPDN_* flags. |
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 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1911 | { |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1912 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
| 1913 | u64 j64 = get_jiffies_64(); |
| 1914 | struct speed_down_verdict_arg arg; |
| 1915 | unsigned int verdict = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1916 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1917 | /* scan past 5 mins of error history */ |
| 1918 | memset(&arg, 0, sizeof(arg)); |
| 1919 | arg.since = j64 - min(j64, j5mins); |
| 1920 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
| 1921 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1922 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
| 1923 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) |
| 1924 | verdict |= ATA_EH_SPDN_SPEED_DOWN | |
| 1925 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; |
| 1926 | |
| 1927 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + |
| 1928 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) |
| 1929 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; |
| 1930 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1931 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
| 1932 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 1933 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1934 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
| 1935 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1936 | /* scan past 10 mins of error history */ |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1937 | memset(&arg, 0, sizeof(arg)); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1938 | arg.since = j64 - min(j64, j10mins); |
| 1939 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1940 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1941 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
| 1942 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1943 | verdict |= ATA_EH_SPDN_NCQ_OFF; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1944 | |
| 1945 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
| 1946 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 1947 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1948 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1949 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1950 | return verdict; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1951 | } |
| 1952 | |
| 1953 | /** |
| 1954 | * ata_eh_speed_down - record error and speed down if necessary |
| 1955 | * @dev: Failed device |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1956 | * @eflags: mask of ATA_EFLAG_* flags |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1957 | * @err_mask: err_mask of the error |
| 1958 | * |
| 1959 | * Record error and examine error history to determine whether |
| 1960 | * adjusting transmission speed is necessary. It also sets |
| 1961 | * transmission limits appropriately if such adjustment is |
| 1962 | * necessary. |
| 1963 | * |
| 1964 | * LOCKING: |
| 1965 | * Kernel thread context (may sleep). |
| 1966 | * |
| 1967 | * RETURNS: |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1968 | * Determined recovery action. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1969 | */ |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1970 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
| 1971 | unsigned int eflags, unsigned int err_mask) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1972 | { |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 1973 | struct ata_link *link = ata_dev_phys_link(dev); |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1974 | int xfer_ok = 0; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1975 | unsigned int verdict; |
| 1976 | unsigned int action = 0; |
| 1977 | |
| 1978 | /* don't bother if Cat-0 error */ |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1979 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1980 | return 0; |
| 1981 | |
| 1982 | /* record error and determine whether speed down is necessary */ |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1983 | ata_ering_record(&dev->ering, eflags, err_mask); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1984 | verdict = ata_eh_speed_down_verdict(dev); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1985 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1986 | /* turn off NCQ? */ |
| 1987 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && |
| 1988 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | |
| 1989 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { |
| 1990 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
| 1991 | ata_dev_printk(dev, KERN_WARNING, |
| 1992 | "NCQ disabled due to excessive errors\n"); |
| 1993 | goto done; |
| 1994 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1995 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1996 | /* speed down? */ |
| 1997 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { |
| 1998 | /* speed down SATA link speed if possible */ |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 1999 | if (sata_down_spd_limit(link, 0) == 0) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2000 | action |= ATA_EH_RESET; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2001 | goto done; |
| 2002 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2003 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2004 | /* lower transfer mode */ |
| 2005 | if (dev->spdn_cnt < 2) { |
| 2006 | static const int dma_dnxfer_sel[] = |
| 2007 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; |
| 2008 | static const int pio_dnxfer_sel[] = |
| 2009 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; |
| 2010 | int sel; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2011 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2012 | if (dev->xfer_shift != ATA_SHIFT_PIO) |
| 2013 | sel = dma_dnxfer_sel[dev->spdn_cnt]; |
| 2014 | else |
| 2015 | sel = pio_dnxfer_sel[dev->spdn_cnt]; |
| 2016 | |
| 2017 | dev->spdn_cnt++; |
| 2018 | |
| 2019 | if (ata_down_xfermask_limit(dev, sel) == 0) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2020 | action |= ATA_EH_RESET; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2021 | goto done; |
| 2022 | } |
| 2023 | } |
| 2024 | } |
| 2025 | |
| 2026 | /* Fall back to PIO? Slowing down to PIO is meaningless for |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 2027 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2028 | */ |
| 2029 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 2030 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2031 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
| 2032 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { |
| 2033 | dev->spdn_cnt = 0; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2034 | action |= ATA_EH_RESET; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2035 | goto done; |
| 2036 | } |
| 2037 | } |
| 2038 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2039 | return 0; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2040 | done: |
| 2041 | /* device has been slowed down, blow error history */ |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 2042 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
| 2043 | ata_ering_clear(&dev->ering); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2044 | return action; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2045 | } |
| 2046 | |
| 2047 | /** |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2048 | * ata_eh_link_autopsy - analyze error and determine recovery action |
| 2049 | * @link: host link to perform autopsy on |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2050 | * |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2051 | * Analyze why @link failed and determine which recovery actions |
| 2052 | * are needed. This function also sets more detailed AC_ERR_* |
| 2053 | * values and fills sense data for ATAPI CHECK SENSE. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2054 | * |
| 2055 | * LOCKING: |
| 2056 | * Kernel thread context (may sleep). |
| 2057 | */ |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2058 | static void ata_eh_link_autopsy(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2059 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2060 | struct ata_port *ap = link->ap; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2061 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2062 | struct ata_device *dev; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2063 | unsigned int all_err_mask = 0, eflags = 0; |
| 2064 | int tag; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2065 | u32 serror; |
| 2066 | int rc; |
| 2067 | |
| 2068 | DPRINTK("ENTER\n"); |
| 2069 | |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 2070 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
| 2071 | return; |
| 2072 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2073 | /* obtain and analyze SError */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2074 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2075 | if (rc == 0) { |
| 2076 | ehc->i.serror |= serror; |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2077 | ata_eh_analyze_serror(link); |
Tejun Heo | 4e57c51 | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 2078 | } else if (rc != -EOPNOTSUPP) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2079 | /* SError read failed, force reset and probing */ |
Tejun Heo | b558edd | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2080 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2081 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 4e57c51 | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 2082 | ehc->i.err_mask |= AC_ERR_OTHER; |
| 2083 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2084 | |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 2085 | /* analyze NCQ failure */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2086 | ata_eh_analyze_ncq_error(link); |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 2087 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2088 | /* any real error trumps AC_ERR_OTHER */ |
| 2089 | if (ehc->i.err_mask & ~AC_ERR_OTHER) |
| 2090 | ehc->i.err_mask &= ~AC_ERR_OTHER; |
| 2091 | |
| 2092 | all_err_mask |= ehc->i.err_mask; |
| 2093 | |
| 2094 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 2095 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
| 2096 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2097 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
| 2098 | ata_dev_phys_link(qc->dev) != link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2099 | continue; |
| 2100 | |
| 2101 | /* inherit upper level err_mask */ |
| 2102 | qc->err_mask |= ehc->i.err_mask; |
| 2103 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2104 | /* analyze TF */ |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2105 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2106 | |
| 2107 | /* DEV errors are probably spurious in case of ATA_BUS error */ |
| 2108 | if (qc->err_mask & AC_ERR_ATA_BUS) |
| 2109 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | |
| 2110 | AC_ERR_INVALID); |
| 2111 | |
| 2112 | /* any real error trumps unknown error */ |
| 2113 | if (qc->err_mask & ~AC_ERR_OTHER) |
| 2114 | qc->err_mask &= ~AC_ERR_OTHER; |
| 2115 | |
| 2116 | /* SENSE_VALID trumps dev/unknown error and revalidation */ |
Tejun Heo | f90f082 | 2007-10-26 16:12:41 +0900 | [diff] [blame] | 2117 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2118 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2119 | |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 2120 | /* determine whether the command is worth retrying */ |
Tejun Heo | 534ead7 | 2010-01-14 16:18:09 +0900 | [diff] [blame] | 2121 | if (qc->flags & ATA_QCFLAG_IO || |
| 2122 | (!(qc->err_mask & AC_ERR_INVALID) && |
| 2123 | qc->err_mask != AC_ERR_DEV)) |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 2124 | qc->flags |= ATA_QCFLAG_RETRY; |
| 2125 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2126 | /* accumulate error info */ |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2127 | ehc->i.dev = qc->dev; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2128 | all_err_mask |= qc->err_mask; |
| 2129 | if (qc->flags & ATA_QCFLAG_IO) |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2130 | eflags |= ATA_EFLAG_IS_IO; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2131 | } |
| 2132 | |
Tejun Heo | a20f33f | 2006-05-16 12:58:24 +0900 | [diff] [blame] | 2133 | /* enforce default EH actions */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 2134 | if (ap->pflags & ATA_PFLAG_FROZEN || |
Tejun Heo | a20f33f | 2006-05-16 12:58:24 +0900 | [diff] [blame] | 2135 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2136 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2137 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
| 2138 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2139 | ehc->i.action |= ATA_EH_REVALIDATE; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2140 | |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2141 | /* If we have offending qcs and the associated failed device, |
| 2142 | * perform per-dev EH action only on the offending device. |
| 2143 | */ |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2144 | if (ehc->i.dev) { |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2145 | ehc->i.dev_action[ehc->i.dev->devno] |= |
| 2146 | ehc->i.action & ATA_EH_PERDEV_MASK; |
| 2147 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 2148 | } |
| 2149 | |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2150 | /* propagate timeout to host link */ |
| 2151 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) |
| 2152 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; |
| 2153 | |
| 2154 | /* record error and consider speeding down */ |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2155 | dev = ehc->i.dev; |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2156 | if (!dev && ((ata_link_max_devices(link) == 1 && |
| 2157 | ata_dev_enabled(link->device)))) |
| 2158 | dev = link->device; |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2159 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 2160 | if (dev) { |
| 2161 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) |
| 2162 | eflags |= ATA_EFLAG_DUBIOUS_XFER; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2163 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 2164 | } |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2165 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2166 | DPRINTK("EXIT\n"); |
| 2167 | } |
| 2168 | |
| 2169 | /** |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2170 | * ata_eh_autopsy - analyze error and determine recovery action |
| 2171 | * @ap: host port to perform autopsy on |
| 2172 | * |
| 2173 | * Analyze all links of @ap and determine why they failed and |
| 2174 | * which recovery actions are needed. |
| 2175 | * |
| 2176 | * LOCKING: |
| 2177 | * Kernel thread context (may sleep). |
| 2178 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2179 | void ata_eh_autopsy(struct ata_port *ap) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2180 | { |
| 2181 | struct ata_link *link; |
| 2182 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2183 | ata_for_each_link(link, ap, EDGE) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2184 | ata_eh_link_autopsy(link); |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2185 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2186 | /* Handle the frigging slave link. Autopsy is done similarly |
| 2187 | * but actions and flags are transferred over to the master |
| 2188 | * link and handled from there. |
| 2189 | */ |
| 2190 | if (ap->slave_link) { |
| 2191 | struct ata_eh_context *mehc = &ap->link.eh_context; |
| 2192 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; |
| 2193 | |
Tejun Heo | 848e4c6 | 2008-10-21 14:26:39 +0900 | [diff] [blame] | 2194 | /* transfer control flags from master to slave */ |
| 2195 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; |
| 2196 | |
| 2197 | /* perform autopsy on the slave link */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2198 | ata_eh_link_autopsy(ap->slave_link); |
| 2199 | |
Tejun Heo | 848e4c6 | 2008-10-21 14:26:39 +0900 | [diff] [blame] | 2200 | /* transfer actions from slave to master and clear slave */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2201 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
| 2202 | mehc->i.action |= sehc->i.action; |
| 2203 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; |
| 2204 | mehc->i.flags |= sehc->i.flags; |
| 2205 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
| 2206 | } |
| 2207 | |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2208 | /* Autopsy of fanout ports can affect host link autopsy. |
| 2209 | * Perform host link autopsy last. |
| 2210 | */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 2211 | if (sata_pmp_attached(ap)) |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2212 | ata_eh_link_autopsy(&ap->link); |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2213 | } |
| 2214 | |
| 2215 | /** |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2216 | * ata_get_cmd_descript - get description for ATA command |
| 2217 | * @command: ATA command code to get description for |
| 2218 | * |
| 2219 | * Return a textual description of the given command, or NULL if the |
| 2220 | * command is not known. |
| 2221 | * |
| 2222 | * LOCKING: |
| 2223 | * None |
| 2224 | */ |
| 2225 | const char *ata_get_cmd_descript(u8 command) |
| 2226 | { |
| 2227 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
| 2228 | static const struct |
| 2229 | { |
| 2230 | u8 command; |
| 2231 | const char *text; |
| 2232 | } cmd_descr[] = { |
| 2233 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, |
| 2234 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, |
| 2235 | { ATA_CMD_STANDBY, "STANDBY" }, |
| 2236 | { ATA_CMD_IDLE, "IDLE" }, |
| 2237 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, |
| 2238 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, |
| 2239 | { ATA_CMD_NOP, "NOP" }, |
| 2240 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, |
| 2241 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, |
| 2242 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, |
| 2243 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, |
| 2244 | { ATA_CMD_SERVICE, "SERVICE" }, |
| 2245 | { ATA_CMD_READ, "READ DMA" }, |
| 2246 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, |
| 2247 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, |
| 2248 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, |
| 2249 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, |
| 2250 | { ATA_CMD_WRITE, "WRITE DMA" }, |
| 2251 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, |
| 2252 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, |
| 2253 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, |
| 2254 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, |
| 2255 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, |
| 2256 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, |
| 2257 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, |
| 2258 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, |
| 2259 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, |
| 2260 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, |
| 2261 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, |
| 2262 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, |
| 2263 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, |
| 2264 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, |
| 2265 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, |
| 2266 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, |
| 2267 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, |
| 2268 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, |
| 2269 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, |
| 2270 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, |
| 2271 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, |
| 2272 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, |
| 2273 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, |
| 2274 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, |
| 2275 | { ATA_CMD_SLEEP, "SLEEP" }, |
| 2276 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, |
| 2277 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, |
| 2278 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, |
| 2279 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, |
| 2280 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, |
| 2281 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, |
| 2282 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, |
| 2283 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, |
| 2284 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, |
| 2285 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, |
| 2286 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, |
| 2287 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, |
| 2288 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, |
| 2289 | { ATA_CMD_PMP_READ, "READ BUFFER" }, |
| 2290 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, |
| 2291 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, |
| 2292 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, |
| 2293 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, |
| 2294 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, |
| 2295 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, |
| 2296 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, |
| 2297 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, |
| 2298 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, |
| 2299 | { ATA_CMD_SMART, "SMART" }, |
| 2300 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, |
| 2301 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, |
FUJITA Tomonori | acad76272 | 2010-07-05 15:45:20 +0900 | [diff] [blame] | 2302 | { ATA_CMD_DSM, "DATA SET MANAGEMENT" }, |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2303 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, |
| 2304 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, |
| 2305 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, |
| 2306 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, |
| 2307 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, |
| 2308 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, |
| 2309 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, |
| 2310 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, |
| 2311 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, |
| 2312 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, |
| 2313 | { ATA_CMD_RESTORE, "RECALIBRATE" }, |
| 2314 | { 0, NULL } /* terminate list */ |
| 2315 | }; |
| 2316 | |
| 2317 | unsigned int i; |
| 2318 | for (i = 0; cmd_descr[i].text; i++) |
| 2319 | if (cmd_descr[i].command == command) |
| 2320 | return cmd_descr[i].text; |
| 2321 | #endif |
| 2322 | |
| 2323 | return NULL; |
| 2324 | } |
| 2325 | |
| 2326 | /** |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2327 | * ata_eh_link_report - report error handling to user |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2328 | * @link: ATA link EH is going on |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2329 | * |
| 2330 | * Report EH to user. |
| 2331 | * |
| 2332 | * LOCKING: |
| 2333 | * None. |
| 2334 | */ |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2335 | static void ata_eh_link_report(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2336 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2337 | struct ata_port *ap = link->ap; |
| 2338 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2339 | const char *frozen, *desc; |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2340 | char tries_buf[6]; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2341 | int tag, nr_failed = 0; |
| 2342 | |
Tejun Heo | 94ff3d5 | 2007-10-09 14:57:56 +0900 | [diff] [blame] | 2343 | if (ehc->i.flags & ATA_EHI_QUIET) |
| 2344 | return; |
| 2345 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2346 | desc = NULL; |
| 2347 | if (ehc->i.desc[0] != '\0') |
| 2348 | desc = ehc->i.desc; |
| 2349 | |
| 2350 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 2351 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
| 2352 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2353 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
| 2354 | ata_dev_phys_link(qc->dev) != link || |
Tejun Heo | e027bd3 | 2007-10-26 16:19:26 +0900 | [diff] [blame] | 2355 | ((qc->flags & ATA_QCFLAG_QUIET) && |
| 2356 | qc->err_mask == AC_ERR_DEV)) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2357 | continue; |
| 2358 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) |
| 2359 | continue; |
| 2360 | |
| 2361 | nr_failed++; |
| 2362 | } |
| 2363 | |
| 2364 | if (!nr_failed && !ehc->i.err_mask) |
| 2365 | return; |
| 2366 | |
| 2367 | frozen = ""; |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 2368 | if (ap->pflags & ATA_PFLAG_FROZEN) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2369 | frozen = " frozen"; |
| 2370 | |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2371 | memset(tries_buf, 0, sizeof(tries_buf)); |
| 2372 | if (ap->eh_tries < ATA_EH_MAX_TRIES) |
| 2373 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", |
| 2374 | ap->eh_tries); |
| 2375 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2376 | if (ehc->i.dev) { |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 2377 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2378 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
| 2379 | ehc->i.err_mask, link->sactive, ehc->i.serror, |
| 2380 | ehc->i.action, frozen, tries_buf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2381 | if (desc) |
Tejun Heo | b64bbc3 | 2007-07-16 14:29:39 +0900 | [diff] [blame] | 2382 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2383 | } else { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2384 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2385 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
| 2386 | ehc->i.err_mask, link->sactive, ehc->i.serror, |
| 2387 | ehc->i.action, frozen, tries_buf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2388 | if (desc) |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2389 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2390 | } |
| 2391 | |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2392 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2393 | if (ehc->i.serror) |
Tejun Heo | da0e21d | 2008-07-31 16:08:38 +0900 | [diff] [blame] | 2394 | ata_link_printk(link, KERN_ERR, |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2395 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
| 2396 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", |
| 2397 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", |
| 2398 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", |
| 2399 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", |
| 2400 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", |
| 2401 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", |
| 2402 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", |
| 2403 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", |
| 2404 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", |
| 2405 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", |
| 2406 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", |
| 2407 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", |
| 2408 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", |
| 2409 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", |
| 2410 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", |
| 2411 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2412 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2413 | #endif |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2414 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2415 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 2416 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2417 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2418 | const u8 *cdb = qc->cdb; |
| 2419 | char data_buf[20] = ""; |
| 2420 | char cdb_buf[70] = ""; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2421 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2422 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2423 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2424 | continue; |
| 2425 | |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2426 | if (qc->dma_dir != DMA_NONE) { |
| 2427 | static const char *dma_str[] = { |
| 2428 | [DMA_BIDIRECTIONAL] = "bidi", |
| 2429 | [DMA_TO_DEVICE] = "out", |
| 2430 | [DMA_FROM_DEVICE] = "in", |
| 2431 | }; |
| 2432 | static const char *prot_str[] = { |
| 2433 | [ATA_PROT_PIO] = "pio", |
| 2434 | [ATA_PROT_DMA] = "dma", |
| 2435 | [ATA_PROT_NCQ] = "ncq", |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 2436 | [ATAPI_PROT_PIO] = "pio", |
| 2437 | [ATAPI_PROT_DMA] = "dma", |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2438 | }; |
| 2439 | |
| 2440 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", |
| 2441 | prot_str[qc->tf.protocol], qc->nbytes, |
| 2442 | dma_str[qc->dma_dir]); |
| 2443 | } |
| 2444 | |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2445 | if (ata_is_atapi(qc->tf.protocol)) { |
| 2446 | if (qc->scsicmd) |
| 2447 | scsi_print_command(qc->scsicmd); |
| 2448 | else |
| 2449 | snprintf(cdb_buf, sizeof(cdb_buf), |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2450 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " |
| 2451 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", |
| 2452 | cdb[0], cdb[1], cdb[2], cdb[3], |
| 2453 | cdb[4], cdb[5], cdb[6], cdb[7], |
| 2454 | cdb[8], cdb[9], cdb[10], cdb[11], |
| 2455 | cdb[12], cdb[13], cdb[14], cdb[15]); |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2456 | } else { |
| 2457 | const char *descr = ata_get_cmd_descript(cmd->command); |
| 2458 | if (descr) |
| 2459 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2460 | "failed command: %s\n", descr); |
| 2461 | } |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2462 | |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2463 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2464 | "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] | 2465 | "tag %d%s\n %s" |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2466 | "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] | 2467 | "Emask 0x%x (%s)%s\n", |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2468 | cmd->command, cmd->feature, cmd->nsect, |
| 2469 | cmd->lbal, cmd->lbam, cmd->lbah, |
| 2470 | cmd->hob_feature, cmd->hob_nsect, |
| 2471 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2472 | cmd->device, qc->tag, data_buf, cdb_buf, |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2473 | res->command, res->feature, res->nsect, |
| 2474 | res->lbal, res->lbam, res->lbah, |
| 2475 | res->hob_feature, res->hob_nsect, |
| 2476 | res->hob_lbal, res->hob_lbam, res->hob_lbah, |
Tejun Heo | 5335b72 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2477 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
| 2478 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2479 | |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2480 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2481 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2482 | ATA_ERR)) { |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2483 | if (res->command & ATA_BUSY) |
| 2484 | ata_dev_printk(qc->dev, KERN_ERR, |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2485 | "status: { Busy }\n"); |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2486 | else |
| 2487 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2488 | "status: { %s%s%s%s}\n", |
| 2489 | res->command & ATA_DRDY ? "DRDY " : "", |
| 2490 | res->command & ATA_DF ? "DF " : "", |
| 2491 | res->command & ATA_DRQ ? "DRQ " : "", |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2492 | res->command & ATA_ERR ? "ERR " : ""); |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2493 | } |
| 2494 | |
| 2495 | if (cmd->command != ATA_CMD_PACKET && |
| 2496 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | |
| 2497 | ATA_ABORTED))) |
| 2498 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2499 | "error: { %s%s%s%s}\n", |
| 2500 | res->feature & ATA_ICRC ? "ICRC " : "", |
| 2501 | res->feature & ATA_UNC ? "UNC " : "", |
| 2502 | res->feature & ATA_IDNF ? "IDNF " : "", |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2503 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2504 | #endif |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2505 | } |
| 2506 | } |
| 2507 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2508 | /** |
| 2509 | * ata_eh_report - report error handling to user |
| 2510 | * @ap: ATA port to report EH about |
| 2511 | * |
| 2512 | * Report EH to user. |
| 2513 | * |
| 2514 | * LOCKING: |
| 2515 | * None. |
| 2516 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2517 | void ata_eh_report(struct ata_port *ap) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2518 | { |
| 2519 | struct ata_link *link; |
| 2520 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2521 | ata_for_each_link(link, ap, HOST_FIRST) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2522 | ata_eh_link_report(link); |
| 2523 | } |
| 2524 | |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2525 | 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] | 2526 | unsigned int *classes, unsigned long deadline, |
| 2527 | bool clear_classes) |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2528 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2529 | struct ata_device *dev; |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2530 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2531 | if (clear_classes) |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2532 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2533 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2534 | |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2535 | return reset(link, classes, deadline); |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2536 | } |
| 2537 | |
Tejun Heo | ae791c0 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2538 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2539 | int rc, const unsigned int *classes) |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2540 | { |
Tejun Heo | 45db2f6 | 2008-04-08 01:46:56 +0900 | [diff] [blame] | 2541 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
Tejun Heo | ae791c0 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2542 | return 0; |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2543 | if (rc == -EAGAIN) |
| 2544 | return 1; |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 2545 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
Tejun Heo | 3495de7 | 2007-09-23 13:19:53 +0900 | [diff] [blame] | 2546 | return 1; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2547 | return 0; |
| 2548 | } |
| 2549 | |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2550 | int ata_eh_reset(struct ata_link *link, int classify, |
| 2551 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, |
| 2552 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2553 | { |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2554 | struct ata_port *ap = link->ap; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2555 | struct ata_link *slave = ap->slave_link; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2556 | struct ata_eh_context *ehc = &link->eh_context; |
Bartlomiej Zolnierkiewicz | 705d201 | 2009-07-26 16:21:01 +0200 | [diff] [blame] | 2557 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2558 | unsigned int *classes = ehc->classes; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2559 | unsigned int lflags = link->flags; |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 2560 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 2561 | int max_tries = 0, try = 0; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2562 | struct ata_link *failed_link; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2563 | struct ata_device *dev; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2564 | unsigned long deadline, now; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2565 | ata_reset_fn_t reset; |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2566 | unsigned long flags; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2567 | u32 sstatus; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2568 | int nr_unknown, rc; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2569 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2570 | /* |
| 2571 | * Prepare to reset |
| 2572 | */ |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 2573 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
| 2574 | max_tries++; |
Tejun Heo | 05944bd | 2008-08-13 20:19:09 +0900 | [diff] [blame] | 2575 | if (link->flags & ATA_LFLAG_NO_HRST) |
| 2576 | hardreset = NULL; |
| 2577 | if (link->flags & ATA_LFLAG_NO_SRST) |
| 2578 | softreset = NULL; |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 2579 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2580 | /* make sure each reset attempt is at least COOL_DOWN apart */ |
Tejun Heo | 19b7232 | 2008-11-04 17:08:40 +0900 | [diff] [blame] | 2581 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
| 2582 | now = jiffies; |
| 2583 | WARN_ON(time_after(ehc->last_reset, now)); |
| 2584 | deadline = ata_deadline(ehc->last_reset, |
| 2585 | ATA_EH_RESET_COOL_DOWN); |
| 2586 | if (time_before(now, deadline)) |
| 2587 | schedule_timeout_uninterruptible(deadline - now); |
| 2588 | } |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 2589 | |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2590 | spin_lock_irqsave(ap->lock, flags); |
| 2591 | ap->pflags |= ATA_PFLAG_RESETTING; |
| 2592 | spin_unlock_irqrestore(ap->lock, flags); |
| 2593 | |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2594 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
Tejun Heo | 13abf50 | 2006-07-10 23:18:46 +0900 | [diff] [blame] | 2595 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2596 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | cdeab11 | 2007-10-29 16:41:09 +0900 | [diff] [blame] | 2597 | /* If we issue an SRST then an ATA drive (not ATAPI) |
| 2598 | * may change configuration and be in PIO0 timing. If |
| 2599 | * we do a hard reset (or are coming from power on) |
| 2600 | * this is true for ATA or ATAPI. Until we've set a |
| 2601 | * suitable controller mode we should not touch the |
| 2602 | * bus as we may be talking too fast. |
| 2603 | */ |
| 2604 | dev->pio_mode = XFER_PIO_0; |
| 2605 | |
| 2606 | /* If the controller has a pio mode setup function |
| 2607 | * then use it to set the chipset to rights. Don't |
| 2608 | * touch the DMA setup as that will be dealt with when |
| 2609 | * configuring devices. |
| 2610 | */ |
| 2611 | if (ap->ops->set_piomode) |
| 2612 | ap->ops->set_piomode(ap, dev); |
| 2613 | } |
| 2614 | |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2615 | /* prefer hardreset */ |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2616 | reset = NULL; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2617 | ehc->i.action &= ~ATA_EH_RESET; |
| 2618 | if (hardreset) { |
| 2619 | reset = hardreset; |
Tejun Heo | a674050 | 2008-07-31 16:07:04 +0900 | [diff] [blame] | 2620 | ehc->i.action |= ATA_EH_HARDRESET; |
Tejun Heo | 4f7faa3 | 2008-01-30 18:18:26 +0900 | [diff] [blame] | 2621 | } else if (softreset) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2622 | reset = softreset; |
Tejun Heo | a674050 | 2008-07-31 16:07:04 +0900 | [diff] [blame] | 2623 | ehc->i.action |= ATA_EH_SOFTRESET; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2624 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2625 | |
| 2626 | if (prereset) { |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2627 | unsigned long deadline = ata_deadline(jiffies, |
| 2628 | ATA_EH_PRERESET_TIMEOUT); |
| 2629 | |
| 2630 | if (slave) { |
| 2631 | sehc->i.action &= ~ATA_EH_RESET; |
| 2632 | sehc->i.action |= ehc->i.action; |
| 2633 | } |
| 2634 | |
| 2635 | rc = prereset(link, deadline); |
| 2636 | |
| 2637 | /* If present, do prereset on slave link too. Reset |
| 2638 | * is skipped iff both master and slave links report |
| 2639 | * -ENOENT or clear ATA_EH_RESET. |
| 2640 | */ |
| 2641 | if (slave && (rc == 0 || rc == -ENOENT)) { |
| 2642 | int tmp; |
| 2643 | |
| 2644 | tmp = prereset(slave, deadline); |
| 2645 | if (tmp != -ENOENT) |
| 2646 | rc = tmp; |
| 2647 | |
| 2648 | ehc->i.action |= sehc->i.action; |
| 2649 | } |
| 2650 | |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2651 | if (rc) { |
Alan Cox | c961922 | 2006-09-26 17:53:38 +0100 | [diff] [blame] | 2652 | if (rc == -ENOENT) { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2653 | ata_link_printk(link, KERN_DEBUG, |
Tejun Heo | 4aa9ab6 | 2007-03-12 17:24:08 +0900 | [diff] [blame] | 2654 | "port disabled. ignoring.\n"); |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2655 | ehc->i.action &= ~ATA_EH_RESET; |
Tejun Heo | 4aa9ab6 | 2007-03-12 17:24:08 +0900 | [diff] [blame] | 2656 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2657 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2658 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | 4aa9ab6 | 2007-03-12 17:24:08 +0900 | [diff] [blame] | 2659 | |
| 2660 | rc = 0; |
Alan Cox | c961922 | 2006-09-26 17:53:38 +0100 | [diff] [blame] | 2661 | } else |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2662 | ata_link_printk(link, KERN_ERR, |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2663 | "prereset failed (errno=%d)\n", rc); |
Tejun Heo | fccb6ea | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 2664 | goto out; |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2665 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2666 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2667 | /* prereset() might have cleared ATA_EH_RESET. If so, |
Tejun Heo | d6515e6 | 2009-03-04 15:59:30 +0900 | [diff] [blame] | 2668 | * bang classes, thaw and return. |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2669 | */ |
| 2670 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2671 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2672 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | d6515e6 | 2009-03-04 15:59:30 +0900 | [diff] [blame] | 2673 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
| 2674 | ata_is_host_link(link)) |
| 2675 | ata_eh_thaw_port(ap); |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2676 | rc = 0; |
| 2677 | goto out; |
| 2678 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2679 | } |
| 2680 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2681 | retry: |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2682 | /* |
| 2683 | * Perform reset |
| 2684 | */ |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 2685 | if (ata_is_host_link(link)) |
| 2686 | ata_eh_freeze_port(ap); |
| 2687 | |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 2688 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
Tejun Heo | 31daabd | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 2689 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2690 | if (reset) { |
| 2691 | if (verbose) |
| 2692 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", |
| 2693 | reset == softreset ? "soft" : "hard"); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2694 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2695 | /* mark that this EH session started with reset */ |
Tejun Heo | 19b7232 | 2008-11-04 17:08:40 +0900 | [diff] [blame] | 2696 | ehc->last_reset = jiffies; |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2697 | if (reset == hardreset) |
| 2698 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; |
| 2699 | else |
| 2700 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2701 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2702 | rc = ata_do_reset(link, reset, classes, deadline, true); |
| 2703 | if (rc && rc != -EAGAIN) { |
| 2704 | failed_link = link; |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2705 | goto fail; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2706 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2707 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2708 | /* hardreset slave link if existent */ |
| 2709 | if (slave && reset == hardreset) { |
| 2710 | int tmp; |
| 2711 | |
| 2712 | if (verbose) |
| 2713 | ata_link_printk(slave, KERN_INFO, |
| 2714 | "hard resetting link\n"); |
| 2715 | |
| 2716 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); |
| 2717 | tmp = ata_do_reset(slave, reset, classes, deadline, |
| 2718 | false); |
| 2719 | switch (tmp) { |
| 2720 | case -EAGAIN: |
| 2721 | rc = -EAGAIN; |
| 2722 | case 0: |
| 2723 | break; |
| 2724 | default: |
| 2725 | failed_link = slave; |
| 2726 | rc = tmp; |
| 2727 | goto fail; |
| 2728 | } |
| 2729 | } |
| 2730 | |
| 2731 | /* perform follow-up SRST if necessary */ |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2732 | if (reset == hardreset && |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2733 | ata_eh_followup_srst_needed(link, rc, classes)) { |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2734 | reset = softreset; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2735 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2736 | if (!reset) { |
| 2737 | ata_link_printk(link, KERN_ERR, |
| 2738 | "follow-up softreset required " |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2739 | "but no softreset available\n"); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2740 | failed_link = link; |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2741 | rc = -EINVAL; |
| 2742 | goto fail; |
| 2743 | } |
| 2744 | |
| 2745 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2746 | rc = ata_do_reset(link, reset, classes, deadline, true); |
Tejun Heo | fe2c4d0 | 2009-07-08 12:16:37 +0900 | [diff] [blame] | 2747 | if (rc) { |
| 2748 | failed_link = link; |
| 2749 | goto fail; |
| 2750 | } |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2751 | } |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2752 | } else { |
| 2753 | if (verbose) |
| 2754 | ata_link_printk(link, KERN_INFO, "no reset method " |
| 2755 | "available, skipping reset\n"); |
| 2756 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) |
| 2757 | lflags |= ATA_LFLAG_ASSUME_ATA; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2758 | } |
| 2759 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2760 | /* |
| 2761 | * Post-reset processing |
| 2762 | */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2763 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2764 | /* After the reset, the device state is PIO 0 and the |
| 2765 | * controller state is undefined. Reset also wakes up |
| 2766 | * drives from sleeping mode. |
| 2767 | */ |
| 2768 | dev->pio_mode = XFER_PIO_0; |
| 2769 | dev->flags &= ~ATA_DFLAG_SLEEPING; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2770 | |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2771 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
| 2772 | continue; |
| 2773 | |
| 2774 | /* apply class override */ |
| 2775 | if (lflags & ATA_LFLAG_ASSUME_ATA) |
| 2776 | classes[dev->devno] = ATA_DEV_ATA; |
| 2777 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) |
| 2778 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2779 | } |
| 2780 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2781 | /* record current link speed */ |
| 2782 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) |
| 2783 | link->sata_spd = (sstatus >> 4) & 0xf; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2784 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
| 2785 | slave->sata_spd = (sstatus >> 4) & 0xf; |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2786 | |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 2787 | /* thaw the port */ |
| 2788 | if (ata_is_host_link(link)) |
| 2789 | ata_eh_thaw_port(ap); |
| 2790 | |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2791 | /* postreset() should clear hardware SError. Although SError |
| 2792 | * is cleared during link resume, clearing SError here is |
| 2793 | * necessary as some PHYs raise hotplug events after SRST. |
| 2794 | * This introduces race condition where hotplug occurs between |
| 2795 | * reset and here. This race is mediated by cross checking |
| 2796 | * link onlineness and classification result later. |
| 2797 | */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2798 | if (postreset) { |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2799 | postreset(link, classes); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2800 | if (slave) |
| 2801 | postreset(slave, classes); |
| 2802 | } |
Tejun Heo | 20952b6 | 2006-05-31 18:27:23 +0900 | [diff] [blame] | 2803 | |
Tejun Heo | 1e64106 | 2009-07-17 11:58:33 +0900 | [diff] [blame] | 2804 | /* |
| 2805 | * Some controllers can't be frozen very well and may set |
| 2806 | * spuruious error conditions during reset. Clear accumulated |
| 2807 | * error information. As reset is the final recovery action, |
| 2808 | * nothing is lost by doing this. |
| 2809 | */ |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2810 | spin_lock_irqsave(link->ap->lock, flags); |
Tejun Heo | 1e64106 | 2009-07-17 11:58:33 +0900 | [diff] [blame] | 2811 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2812 | if (slave) |
Tejun Heo | 1e64106 | 2009-07-17 11:58:33 +0900 | [diff] [blame] | 2813 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
| 2814 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2815 | spin_unlock_irqrestore(link->ap->lock, flags); |
| 2816 | |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2817 | /* |
| 2818 | * Make sure onlineness and classification result correspond. |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2819 | * Hotplug could have happened during reset and some |
| 2820 | * controllers fail to wait while a drive is spinning up after |
| 2821 | * being hotplugged causing misdetection. By cross checking |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2822 | * link on/offlineness and classification result, those |
| 2823 | * conditions can be reliably detected and retried. |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2824 | */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2825 | nr_unknown = 0; |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2826 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2827 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
| 2828 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { |
| 2829 | ata_dev_printk(dev, KERN_DEBUG, "link online " |
| 2830 | "but device misclassifed\n"); |
| 2831 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2832 | nr_unknown++; |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2833 | } |
| 2834 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
| 2835 | if (ata_class_enabled(classes[dev->devno])) |
| 2836 | ata_dev_printk(dev, KERN_DEBUG, "link offline, " |
| 2837 | "clearing class %d to NONE\n", |
| 2838 | classes[dev->devno]); |
| 2839 | classes[dev->devno] = ATA_DEV_NONE; |
| 2840 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { |
| 2841 | ata_dev_printk(dev, KERN_DEBUG, "link status unknown, " |
| 2842 | "clearing UNKNOWN to NONE\n"); |
| 2843 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2844 | } |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2845 | } |
| 2846 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2847 | if (classify && nr_unknown) { |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2848 | if (try < max_tries) { |
| 2849 | ata_link_printk(link, KERN_WARNING, "link online but " |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2850 | "%d devices misclassified, retrying\n", |
| 2851 | nr_unknown); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2852 | failed_link = link; |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2853 | rc = -EAGAIN; |
| 2854 | goto fail; |
| 2855 | } |
| 2856 | ata_link_printk(link, KERN_WARNING, |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2857 | "link online but %d devices misclassified, " |
| 2858 | "device detection might fail\n", nr_unknown); |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2859 | } |
| 2860 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2861 | /* reset successful, schedule revalidation */ |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2862 | ata_eh_done(link, NULL, ATA_EH_RESET); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2863 | if (slave) |
| 2864 | ata_eh_done(slave, NULL, ATA_EH_RESET); |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 2865 | ehc->last_reset = jiffies; /* update to completion time */ |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2866 | ehc->i.action |= ATA_EH_REVALIDATE; |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 2867 | link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */ |
Tejun Heo | ae791c0 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2868 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2869 | rc = 0; |
Tejun Heo | fccb6ea | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 2870 | out: |
| 2871 | /* clear hotplug flag */ |
| 2872 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2873 | if (slave) |
| 2874 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2875 | |
| 2876 | spin_lock_irqsave(ap->lock, flags); |
| 2877 | ap->pflags &= ~ATA_PFLAG_RESETTING; |
| 2878 | spin_unlock_irqrestore(ap->lock, flags); |
| 2879 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2880 | return rc; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2881 | |
| 2882 | fail: |
Tejun Heo | 5958e30 | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 2883 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
| 2884 | if (!ata_is_host_link(link) && |
| 2885 | sata_scr_read(link, SCR_STATUS, &sstatus)) |
| 2886 | rc = -ERESTART; |
| 2887 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2888 | if (rc == -ERESTART || try >= max_tries) |
| 2889 | goto out; |
| 2890 | |
| 2891 | now = jiffies; |
| 2892 | if (time_before(now, deadline)) { |
| 2893 | unsigned long delta = deadline - now; |
| 2894 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2895 | ata_link_printk(failed_link, KERN_WARNING, |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 2896 | "reset failed (errno=%d), retrying in %u secs\n", |
| 2897 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2898 | |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 2899 | ata_eh_release(ap); |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2900 | while (delta) |
| 2901 | delta = schedule_timeout_uninterruptible(delta); |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 2902 | ata_eh_acquire(ap); |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2903 | } |
| 2904 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2905 | if (try == max_tries - 1) { |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 2906 | sata_down_spd_limit(link, 0); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2907 | if (slave) |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 2908 | sata_down_spd_limit(slave, 0); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2909 | } else if (rc == -EPIPE) |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 2910 | sata_down_spd_limit(failed_link, 0); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2911 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2912 | if (hardreset) |
| 2913 | reset = hardreset; |
| 2914 | goto retry; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2915 | } |
| 2916 | |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 2917 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
| 2918 | { |
| 2919 | struct ata_link *link; |
| 2920 | struct ata_device *dev; |
| 2921 | unsigned long flags; |
| 2922 | |
| 2923 | /* |
| 2924 | * This function can be thought of as an extended version of |
| 2925 | * ata_eh_about_to_do() specially crafted to accommodate the |
| 2926 | * requirements of ATA_EH_PARK handling. Since the EH thread |
| 2927 | * does not leave the do {} while () loop in ata_eh_recover as |
| 2928 | * long as the timeout for a park request to *one* device on |
| 2929 | * the port has not expired, and since we still want to pick |
| 2930 | * up park requests to other devices on the same port or |
| 2931 | * timeout updates for the same device, we have to pull |
| 2932 | * ATA_EH_PARK actions from eh_info into eh_context.i |
| 2933 | * ourselves at the beginning of each pass over the loop. |
| 2934 | * |
| 2935 | * Additionally, all write accesses to &ap->park_req_pending |
| 2936 | * through INIT_COMPLETION() (see below) or complete_all() |
| 2937 | * (see ata_scsi_park_store()) are protected by the host lock. |
| 2938 | * As a result we have that park_req_pending.done is zero on |
| 2939 | * exit from this function, i.e. when ATA_EH_PARK actions for |
| 2940 | * *all* devices on port ap have been pulled into the |
| 2941 | * respective eh_context structs. If, and only if, |
| 2942 | * park_req_pending.done is non-zero by the time we reach |
| 2943 | * wait_for_completion_timeout(), another ATA_EH_PARK action |
| 2944 | * has been scheduled for at least one of the devices on port |
| 2945 | * ap and we have to cycle over the do {} while () loop in |
| 2946 | * ata_eh_recover() again. |
| 2947 | */ |
| 2948 | |
| 2949 | spin_lock_irqsave(ap->lock, flags); |
| 2950 | INIT_COMPLETION(ap->park_req_pending); |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2951 | ata_for_each_link(link, ap, EDGE) { |
| 2952 | ata_for_each_dev(dev, link, ALL) { |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 2953 | struct ata_eh_info *ehi = &link->eh_info; |
| 2954 | |
| 2955 | link->eh_context.i.dev_action[dev->devno] |= |
| 2956 | ehi->dev_action[dev->devno] & ATA_EH_PARK; |
| 2957 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); |
| 2958 | } |
| 2959 | } |
| 2960 | spin_unlock_irqrestore(ap->lock, flags); |
| 2961 | } |
| 2962 | |
| 2963 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) |
| 2964 | { |
| 2965 | struct ata_eh_context *ehc = &dev->link->eh_context; |
| 2966 | struct ata_taskfile tf; |
| 2967 | unsigned int err_mask; |
| 2968 | |
| 2969 | ata_tf_init(dev, &tf); |
| 2970 | if (park) { |
| 2971 | ehc->unloaded_mask |= 1 << dev->devno; |
| 2972 | tf.command = ATA_CMD_IDLEIMMEDIATE; |
| 2973 | tf.feature = 0x44; |
| 2974 | tf.lbal = 0x4c; |
| 2975 | tf.lbam = 0x4e; |
| 2976 | tf.lbah = 0x55; |
| 2977 | } else { |
| 2978 | ehc->unloaded_mask &= ~(1 << dev->devno); |
| 2979 | tf.command = ATA_CMD_CHK_POWER; |
| 2980 | } |
| 2981 | |
| 2982 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
| 2983 | tf.protocol |= ATA_PROT_NODATA; |
| 2984 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| 2985 | if (park && (err_mask || tf.lbal != 0xc4)) { |
| 2986 | ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); |
| 2987 | ehc->unloaded_mask &= ~(1 << dev->devno); |
| 2988 | } |
| 2989 | } |
| 2990 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2991 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2992 | struct ata_device **r_failed_dev) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2993 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2994 | struct ata_port *ap = link->ap; |
| 2995 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2996 | struct ata_device *dev; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2997 | unsigned int new_mask = 0; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2998 | unsigned long flags; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2999 | int rc = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3000 | |
| 3001 | DPRINTK("ENTER\n"); |
| 3002 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3003 | /* For PATA drive side cable detection to work, IDENTIFY must |
| 3004 | * be done backwards such that PDIAG- is released by the slave |
| 3005 | * device before the master device is identified. |
| 3006 | */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3007 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3008 | unsigned int action = ata_eh_dev_action(dev); |
| 3009 | unsigned int readid_flags = 0; |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 3010 | |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3011 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
| 3012 | readid_flags |= ATA_READID_POSTRESET; |
| 3013 | |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 3014 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
Tejun Heo | 633273a | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 3015 | WARN_ON(dev->class == ATA_DEV_PMP); |
| 3016 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 3017 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3018 | rc = -EIO; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3019 | goto err; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3020 | } |
| 3021 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3022 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
Tejun Heo | 422c9da | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3023 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
| 3024 | readid_flags); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3025 | if (rc) |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3026 | goto err; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3027 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3028 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 3029 | |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 3030 | /* Configuration may have changed, reconfigure |
| 3031 | * transfer mode. |
| 3032 | */ |
| 3033 | ehc->i.flags |= ATA_EHI_SETMODE; |
| 3034 | |
zhao, forrest | 3057ac3 | 2006-06-12 12:01:34 +0800 | [diff] [blame] | 3035 | /* schedule the scsi_rescan_device() here */ |
Tejun Heo | ad72cf9 | 2010-07-02 10:03:52 +0200 | [diff] [blame] | 3036 | schedule_work(&(ap->scsi_rescan_task)); |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3037 | } else if (dev->class == ATA_DEV_UNKNOWN && |
| 3038 | ehc->tries[dev->devno] && |
| 3039 | ata_class_enabled(ehc->classes[dev->devno])) { |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3040 | /* Temporarily set dev->class, it will be |
| 3041 | * permanently set once all configurations are |
| 3042 | * complete. This is necessary because new |
| 3043 | * device configuration is done in two |
| 3044 | * separate loops. |
| 3045 | */ |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3046 | dev->class = ehc->classes[dev->devno]; |
| 3047 | |
Tejun Heo | 633273a | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 3048 | if (dev->class == ATA_DEV_PMP) |
| 3049 | rc = sata_pmp_attach(dev); |
| 3050 | else |
| 3051 | rc = ata_dev_read_id(dev, &dev->class, |
| 3052 | readid_flags, dev->id); |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3053 | |
| 3054 | /* read_id might have changed class, store and reset */ |
| 3055 | ehc->classes[dev->devno] = dev->class; |
| 3056 | dev->class = ATA_DEV_UNKNOWN; |
| 3057 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3058 | switch (rc) { |
| 3059 | case 0: |
Tejun Heo | 99cf610 | 2009-01-29 20:31:32 +0900 | [diff] [blame] | 3060 | /* clear error info accumulated during probe */ |
| 3061 | ata_ering_clear(&dev->ering); |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3062 | new_mask |= 1 << dev->devno; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3063 | break; |
| 3064 | case -ENOENT: |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3065 | /* IDENTIFY was issued to non-existent |
| 3066 | * device. No need to reset. Just |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3067 | * thaw and ignore the device. |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3068 | */ |
| 3069 | ata_eh_thaw_port(ap); |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3070 | break; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3071 | default: |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3072 | goto err; |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3073 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3074 | } |
| 3075 | } |
| 3076 | |
Tejun Heo | c1c4e8d | 2007-04-23 02:05:53 +0900 | [diff] [blame] | 3077 | /* PDIAG- should have been released, ask cable type if post-reset */ |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 3078 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
| 3079 | if (ap->ops->cable_detect) |
| 3080 | ap->cbl = ap->ops->cable_detect(ap); |
| 3081 | ata_force_cbl(ap); |
| 3082 | } |
Tejun Heo | c1c4e8d | 2007-04-23 02:05:53 +0900 | [diff] [blame] | 3083 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3084 | /* Configure new devices forward such that user doesn't see |
| 3085 | * device detection messages backwards. |
| 3086 | */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3087 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 4f7c287 | 2009-10-15 23:37:32 +0900 | [diff] [blame] | 3088 | if (!(new_mask & (1 << dev->devno))) |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3089 | continue; |
| 3090 | |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3091 | dev->class = ehc->classes[dev->devno]; |
| 3092 | |
Tejun Heo | 4f7c287 | 2009-10-15 23:37:32 +0900 | [diff] [blame] | 3093 | if (dev->class == ATA_DEV_PMP) |
| 3094 | continue; |
| 3095 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3096 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
| 3097 | rc = ata_dev_configure(dev); |
| 3098 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3099 | if (rc) { |
| 3100 | dev->class = ATA_DEV_UNKNOWN; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3101 | goto err; |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3102 | } |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3103 | |
| 3104 | spin_lock_irqsave(ap->lock, flags); |
| 3105 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
| 3106 | spin_unlock_irqrestore(ap->lock, flags); |
| 3107 | |
| 3108 | /* new device discovered, configure xfermode */ |
| 3109 | ehc->i.flags |= ATA_EHI_SETMODE; |
| 3110 | } |
| 3111 | |
| 3112 | return 0; |
| 3113 | |
| 3114 | err: |
| 3115 | *r_failed_dev = dev; |
| 3116 | DPRINTK("EXIT rc=%d\n", rc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3117 | return rc; |
| 3118 | } |
| 3119 | |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 3120 | /** |
| 3121 | * ata_set_mode - Program timings and issue SET FEATURES - XFER |
| 3122 | * @link: link on which timings will be programmed |
Martin Olsson | 98a1708 | 2009-04-22 18:21:29 +0200 | [diff] [blame] | 3123 | * @r_failed_dev: out parameter for failed device |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 3124 | * |
| 3125 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
| 3126 | * ata_set_mode() fails, pointer to the failing device is |
| 3127 | * returned in @r_failed_dev. |
| 3128 | * |
| 3129 | * LOCKING: |
| 3130 | * PCI/etc. bus probe sem. |
| 3131 | * |
| 3132 | * RETURNS: |
| 3133 | * 0 on success, negative errno otherwise |
| 3134 | */ |
| 3135 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
| 3136 | { |
| 3137 | struct ata_port *ap = link->ap; |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 3138 | struct ata_device *dev; |
| 3139 | int rc; |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 3140 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 3141 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3142 | ata_for_each_dev(dev, link, ENABLED) { |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 3143 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
| 3144 | struct ata_ering_entry *ent; |
| 3145 | |
| 3146 | ent = ata_ering_top(&dev->ering); |
| 3147 | if (ent) |
| 3148 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; |
| 3149 | } |
| 3150 | } |
| 3151 | |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 3152 | /* has private set_mode? */ |
| 3153 | if (ap->ops->set_mode) |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 3154 | rc = ap->ops->set_mode(link, r_failed_dev); |
| 3155 | else |
| 3156 | rc = ata_do_set_mode(link, r_failed_dev); |
| 3157 | |
| 3158 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3159 | ata_for_each_dev(dev, link, ENABLED) { |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 3160 | struct ata_eh_context *ehc = &link->eh_context; |
| 3161 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; |
| 3162 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); |
| 3163 | |
| 3164 | if (dev->xfer_mode != saved_xfer_mode || |
| 3165 | ata_ncq_enabled(dev) != saved_ncq) |
| 3166 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; |
| 3167 | } |
| 3168 | |
| 3169 | return rc; |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 3170 | } |
| 3171 | |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3172 | /** |
| 3173 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset |
| 3174 | * @dev: ATAPI device to clear UA for |
| 3175 | * |
| 3176 | * Resets and other operations can make an ATAPI device raise |
| 3177 | * UNIT ATTENTION which causes the next operation to fail. This |
| 3178 | * function clears UA. |
| 3179 | * |
| 3180 | * LOCKING: |
| 3181 | * EH context (may sleep). |
| 3182 | * |
| 3183 | * RETURNS: |
| 3184 | * 0 on success, -errno on failure. |
| 3185 | */ |
| 3186 | static int atapi_eh_clear_ua(struct ata_device *dev) |
| 3187 | { |
| 3188 | int i; |
| 3189 | |
| 3190 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { |
Tejun Heo | b535708 | 2009-03-02 18:55:16 +0900 | [diff] [blame] | 3191 | u8 *sense_buffer = dev->link->ap->sector_buf; |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3192 | u8 sense_key = 0; |
| 3193 | unsigned int err_mask; |
| 3194 | |
| 3195 | err_mask = atapi_eh_tur(dev, &sense_key); |
| 3196 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { |
| 3197 | ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " |
| 3198 | "failed (err_mask=0x%x)\n", err_mask); |
| 3199 | return -EIO; |
| 3200 | } |
| 3201 | |
| 3202 | if (!err_mask || sense_key != UNIT_ATTENTION) |
| 3203 | return 0; |
| 3204 | |
| 3205 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); |
| 3206 | if (err_mask) { |
| 3207 | ata_dev_printk(dev, KERN_WARNING, "failed to clear " |
| 3208 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); |
| 3209 | return -EIO; |
| 3210 | } |
| 3211 | } |
| 3212 | |
| 3213 | ata_dev_printk(dev, KERN_WARNING, |
| 3214 | "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); |
| 3215 | |
| 3216 | return 0; |
| 3217 | } |
| 3218 | |
Tejun Heo | 6013efd | 2009-11-19 15:36:45 +0900 | [diff] [blame] | 3219 | /** |
| 3220 | * ata_eh_maybe_retry_flush - Retry FLUSH if necessary |
| 3221 | * @dev: ATA device which may need FLUSH retry |
| 3222 | * |
| 3223 | * If @dev failed FLUSH, it needs to be reported upper layer |
| 3224 | * immediately as it means that @dev failed to remap and already |
| 3225 | * lost at least a sector and further FLUSH retrials won't make |
| 3226 | * any difference to the lost sector. However, if FLUSH failed |
| 3227 | * for other reasons, for example transmission error, FLUSH needs |
| 3228 | * to be retried. |
| 3229 | * |
| 3230 | * This function determines whether FLUSH failure retry is |
| 3231 | * necessary and performs it if so. |
| 3232 | * |
| 3233 | * RETURNS: |
| 3234 | * 0 if EH can continue, -errno if EH needs to be repeated. |
| 3235 | */ |
| 3236 | static int ata_eh_maybe_retry_flush(struct ata_device *dev) |
| 3237 | { |
| 3238 | struct ata_link *link = dev->link; |
| 3239 | struct ata_port *ap = link->ap; |
| 3240 | struct ata_queued_cmd *qc; |
| 3241 | struct ata_taskfile tf; |
| 3242 | unsigned int err_mask; |
| 3243 | int rc = 0; |
| 3244 | |
| 3245 | /* did flush fail for this device? */ |
| 3246 | if (!ata_tag_valid(link->active_tag)) |
| 3247 | return 0; |
| 3248 | |
| 3249 | qc = __ata_qc_from_tag(ap, link->active_tag); |
| 3250 | if (qc->dev != dev || (qc->tf.command != ATA_CMD_FLUSH_EXT && |
| 3251 | qc->tf.command != ATA_CMD_FLUSH)) |
| 3252 | return 0; |
| 3253 | |
| 3254 | /* if the device failed it, it should be reported to upper layers */ |
| 3255 | if (qc->err_mask & AC_ERR_DEV) |
| 3256 | return 0; |
| 3257 | |
| 3258 | /* flush failed for some other reason, give it another shot */ |
| 3259 | ata_tf_init(dev, &tf); |
| 3260 | |
| 3261 | tf.command = qc->tf.command; |
| 3262 | tf.flags |= ATA_TFLAG_DEVICE; |
| 3263 | tf.protocol = ATA_PROT_NODATA; |
| 3264 | |
| 3265 | ata_dev_printk(dev, KERN_WARNING, "retrying FLUSH 0x%x Emask 0x%x\n", |
| 3266 | tf.command, qc->err_mask); |
| 3267 | |
| 3268 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| 3269 | if (!err_mask) { |
| 3270 | /* |
| 3271 | * FLUSH is complete but there's no way to |
| 3272 | * successfully complete a failed command from EH. |
| 3273 | * Making sure retry is allowed at least once and |
| 3274 | * retrying it should do the trick - whatever was in |
| 3275 | * the cache is already on the platter and this won't |
| 3276 | * cause infinite loop. |
| 3277 | */ |
| 3278 | qc->scsicmd->allowed = max(qc->scsicmd->allowed, 1); |
| 3279 | } else { |
| 3280 | ata_dev_printk(dev, KERN_WARNING, "FLUSH failed Emask 0x%x\n", |
| 3281 | err_mask); |
| 3282 | rc = -EIO; |
| 3283 | |
| 3284 | /* if device failed it, report it to upper layers */ |
| 3285 | if (err_mask & AC_ERR_DEV) { |
| 3286 | qc->err_mask |= AC_ERR_DEV; |
| 3287 | qc->result_tf = tf; |
| 3288 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) |
| 3289 | rc = 0; |
| 3290 | } |
| 3291 | } |
| 3292 | return rc; |
| 3293 | } |
| 3294 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3295 | /** |
| 3296 | * ata_eh_set_lpm - configure SATA interface power management |
| 3297 | * @link: link to configure power management |
| 3298 | * @policy: the link power management policy |
| 3299 | * @r_failed_dev: out parameter for failed device |
| 3300 | * |
| 3301 | * Enable SATA Interface power management. This will enable |
| 3302 | * Device Interface Power Management (DIPM) for min_power |
| 3303 | * policy, and then call driver specific callbacks for |
| 3304 | * enabling Host Initiated Power management. |
| 3305 | * |
| 3306 | * LOCKING: |
| 3307 | * EH context. |
| 3308 | * |
| 3309 | * RETURNS: |
| 3310 | * 0 on success, -errno on failure. |
| 3311 | */ |
| 3312 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, |
| 3313 | struct ata_device **r_failed_dev) |
| 3314 | { |
Tejun Heo | 6c8ea89 | 2010-09-01 17:50:07 +0200 | [diff] [blame] | 3315 | struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL; |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3316 | struct ata_eh_context *ehc = &link->eh_context; |
| 3317 | struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; |
Tejun Heo | e5005b1 | 2010-12-09 16:13:15 +0100 | [diff] [blame] | 3318 | enum ata_lpm_policy old_policy = link->lpm_policy; |
Tejun Heo | 5f6f12c | 2011-05-09 16:04:11 +0200 | [diff] [blame] | 3319 | bool no_dipm = link->ap->flags & ATA_FLAG_NO_DIPM; |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3320 | unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; |
| 3321 | unsigned int err_mask; |
| 3322 | int rc; |
| 3323 | |
| 3324 | /* if the link or host doesn't do LPM, noop */ |
| 3325 | if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) |
| 3326 | return 0; |
| 3327 | |
| 3328 | /* |
| 3329 | * DIPM is enabled only for MIN_POWER as some devices |
| 3330 | * misbehave when the host NACKs transition to SLUMBER. Order |
| 3331 | * device and link configurations such that the host always |
| 3332 | * allows DIPM requests. |
| 3333 | */ |
| 3334 | ata_for_each_dev(dev, link, ENABLED) { |
| 3335 | bool hipm = ata_id_has_hipm(dev->id); |
Tejun Heo | ae01b24 | 2011-03-16 11:14:55 +0100 | [diff] [blame] | 3336 | bool dipm = ata_id_has_dipm(dev->id) && !no_dipm; |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3337 | |
| 3338 | /* find the first enabled and LPM enabled devices */ |
| 3339 | if (!link_dev) |
| 3340 | link_dev = dev; |
| 3341 | |
| 3342 | if (!lpm_dev && (hipm || dipm)) |
| 3343 | lpm_dev = dev; |
| 3344 | |
| 3345 | hints &= ~ATA_LPM_EMPTY; |
| 3346 | if (!hipm) |
| 3347 | hints &= ~ATA_LPM_HIPM; |
| 3348 | |
| 3349 | /* disable DIPM before changing link config */ |
| 3350 | if (policy != ATA_LPM_MIN_POWER && dipm) { |
| 3351 | err_mask = ata_dev_set_feature(dev, |
| 3352 | SETFEATURES_SATA_DISABLE, SATA_DIPM); |
| 3353 | if (err_mask && err_mask != AC_ERR_DEV) { |
| 3354 | ata_dev_printk(dev, KERN_WARNING, |
| 3355 | "failed to disable DIPM, Emask 0x%x\n", |
| 3356 | err_mask); |
| 3357 | rc = -EIO; |
| 3358 | goto fail; |
| 3359 | } |
| 3360 | } |
| 3361 | } |
| 3362 | |
Tejun Heo | 6c8ea89 | 2010-09-01 17:50:07 +0200 | [diff] [blame] | 3363 | if (ap) { |
| 3364 | rc = ap->ops->set_lpm(link, policy, hints); |
| 3365 | if (!rc && ap->slave_link) |
| 3366 | rc = ap->ops->set_lpm(ap->slave_link, policy, hints); |
| 3367 | } else |
| 3368 | rc = sata_pmp_set_lpm(link, policy, hints); |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3369 | |
| 3370 | /* |
| 3371 | * Attribute link config failure to the first (LPM) enabled |
| 3372 | * device on the link. |
| 3373 | */ |
| 3374 | if (rc) { |
| 3375 | if (rc == -EOPNOTSUPP) { |
| 3376 | link->flags |= ATA_LFLAG_NO_LPM; |
| 3377 | return 0; |
| 3378 | } |
| 3379 | dev = lpm_dev ? lpm_dev : link_dev; |
| 3380 | goto fail; |
| 3381 | } |
| 3382 | |
Tejun Heo | e5005b1 | 2010-12-09 16:13:15 +0100 | [diff] [blame] | 3383 | /* |
| 3384 | * Low level driver acked the transition. Issue DIPM command |
| 3385 | * with the new policy set. |
| 3386 | */ |
| 3387 | link->lpm_policy = policy; |
| 3388 | if (ap && ap->slave_link) |
| 3389 | ap->slave_link->lpm_policy = policy; |
| 3390 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3391 | /* host config updated, enable DIPM if transitioning to MIN_POWER */ |
| 3392 | ata_for_each_dev(dev, link, ENABLED) { |
Tejun Heo | ae01b24 | 2011-03-16 11:14:55 +0100 | [diff] [blame] | 3393 | if (policy == ATA_LPM_MIN_POWER && !no_dipm && |
| 3394 | ata_id_has_dipm(dev->id)) { |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3395 | err_mask = ata_dev_set_feature(dev, |
| 3396 | SETFEATURES_SATA_ENABLE, SATA_DIPM); |
| 3397 | if (err_mask && err_mask != AC_ERR_DEV) { |
| 3398 | ata_dev_printk(dev, KERN_WARNING, |
| 3399 | "failed to enable DIPM, Emask 0x%x\n", |
| 3400 | err_mask); |
| 3401 | rc = -EIO; |
| 3402 | goto fail; |
| 3403 | } |
| 3404 | } |
| 3405 | } |
| 3406 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3407 | return 0; |
| 3408 | |
| 3409 | fail: |
Tejun Heo | e5005b1 | 2010-12-09 16:13:15 +0100 | [diff] [blame] | 3410 | /* restore the old policy */ |
| 3411 | link->lpm_policy = old_policy; |
| 3412 | if (ap && ap->slave_link) |
| 3413 | ap->slave_link->lpm_policy = old_policy; |
| 3414 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3415 | /* if no device or only one more chance is left, disable LPM */ |
| 3416 | if (!dev || ehc->tries[dev->devno] <= 2) { |
| 3417 | ata_link_printk(link, KERN_WARNING, |
| 3418 | "disabling LPM on the link\n"); |
| 3419 | link->flags |= ATA_LFLAG_NO_LPM; |
| 3420 | } |
| 3421 | if (r_failed_dev) |
| 3422 | *r_failed_dev = dev; |
| 3423 | return rc; |
| 3424 | } |
| 3425 | |
Kristen Carlson Accardi | 8a745f1 | 2011-03-04 10:24:11 -0800 | [diff] [blame] | 3426 | int ata_link_nr_enabled(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3427 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3428 | struct ata_device *dev; |
| 3429 | int cnt = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3430 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3431 | ata_for_each_dev(dev, link, ENABLED) |
| 3432 | cnt++; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3433 | return cnt; |
| 3434 | } |
| 3435 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3436 | static int ata_link_nr_vacant(struct ata_link *link) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3437 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3438 | struct ata_device *dev; |
| 3439 | int cnt = 0; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3440 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3441 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3442 | if (dev->class == ATA_DEV_UNKNOWN) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3443 | cnt++; |
| 3444 | return cnt; |
| 3445 | } |
| 3446 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3447 | static int ata_eh_skip_recovery(struct ata_link *link) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3448 | { |
Tejun Heo | 672b2d6 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 3449 | struct ata_port *ap = link->ap; |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3450 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3451 | struct ata_device *dev; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3452 | |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 3453 | /* skip disabled links */ |
| 3454 | if (link->flags & ATA_LFLAG_DISABLED) |
| 3455 | return 1; |
| 3456 | |
Tejun Heo | e2f3d75 | 2010-09-07 14:05:31 +0200 | [diff] [blame] | 3457 | /* skip if explicitly requested */ |
| 3458 | if (ehc->i.flags & ATA_EHI_NO_RECOVERY) |
| 3459 | return 1; |
| 3460 | |
Tejun Heo | 672b2d6 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 3461 | /* thaw frozen port and recover failed devices */ |
| 3462 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) |
| 3463 | return 0; |
| 3464 | |
| 3465 | /* reset at least once if reset is requested */ |
| 3466 | if ((ehc->i.action & ATA_EH_RESET) && |
| 3467 | !(ehc->i.flags & ATA_EHI_DID_RESET)) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3468 | return 0; |
| 3469 | |
| 3470 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3471 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3472 | if (dev->class == ATA_DEV_UNKNOWN && |
| 3473 | ehc->classes[dev->devno] != ATA_DEV_NONE) |
| 3474 | return 0; |
| 3475 | } |
| 3476 | |
| 3477 | return 1; |
| 3478 | } |
| 3479 | |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 3480 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
| 3481 | { |
| 3482 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); |
| 3483 | u64 now = get_jiffies_64(); |
| 3484 | int *trials = void_arg; |
| 3485 | |
| 3486 | if (ent->timestamp < now - min(now, interval)) |
| 3487 | return -1; |
| 3488 | |
| 3489 | (*trials)++; |
| 3490 | return 0; |
| 3491 | } |
| 3492 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3493 | static int ata_eh_schedule_probe(struct ata_device *dev) |
| 3494 | { |
| 3495 | struct ata_eh_context *ehc = &dev->link->eh_context; |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 3496 | struct ata_link *link = ata_dev_phys_link(dev); |
| 3497 | int trials = 0; |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3498 | |
| 3499 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || |
| 3500 | (ehc->did_probe_mask & (1 << dev->devno))) |
| 3501 | return 0; |
| 3502 | |
| 3503 | ata_eh_detach_dev(dev); |
| 3504 | ata_dev_init(dev); |
| 3505 | ehc->did_probe_mask |= (1 << dev->devno); |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 3506 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 3507 | ehc->saved_xfer_mode[dev->devno] = 0; |
| 3508 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3509 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3510 | /* the link maybe in a deep sleep, wake it up */ |
Tejun Heo | 6c8ea89 | 2010-09-01 17:50:07 +0200 | [diff] [blame] | 3511 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { |
| 3512 | if (ata_is_host_link(link)) |
| 3513 | link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER, |
| 3514 | ATA_LPM_EMPTY); |
| 3515 | else |
| 3516 | sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER, |
| 3517 | ATA_LPM_EMPTY); |
| 3518 | } |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3519 | |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 3520 | /* Record and count probe trials on the ering. The specific |
| 3521 | * error mask used is irrelevant. Because a successful device |
| 3522 | * detection clears the ering, this count accumulates only if |
| 3523 | * there are consecutive failed probes. |
| 3524 | * |
| 3525 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS |
| 3526 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is |
| 3527 | * forced to 1.5Gbps. |
| 3528 | * |
| 3529 | * This is to work around cases where failed link speed |
| 3530 | * negotiation results in device misdetection leading to |
| 3531 | * infinite DEVXCHG or PHRDY CHG events. |
| 3532 | */ |
| 3533 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); |
| 3534 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); |
| 3535 | |
| 3536 | if (trials > ATA_EH_PROBE_TRIALS) |
| 3537 | sata_down_spd_limit(link, 1); |
| 3538 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3539 | return 1; |
| 3540 | } |
| 3541 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3542 | 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] | 3543 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 3544 | struct ata_eh_context *ehc = &dev->link->eh_context; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3545 | |
Tejun Heo | cf9a590 | 2009-01-29 20:31:35 +0900 | [diff] [blame] | 3546 | /* -EAGAIN from EH routine indicates retry without prejudice. |
| 3547 | * The requester is responsible for ensuring forward progress. |
| 3548 | */ |
| 3549 | if (err != -EAGAIN) |
| 3550 | ehc->tries[dev->devno]--; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3551 | |
| 3552 | switch (err) { |
| 3553 | case -ENODEV: |
| 3554 | /* device missing or wrong IDENTIFY data, schedule probing */ |
| 3555 | ehc->i.probe_mask |= (1 << dev->devno); |
| 3556 | case -EINVAL: |
| 3557 | /* give it just one more chance */ |
| 3558 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); |
| 3559 | case -EIO: |
Tejun Heo | d89293a | 2009-01-29 20:31:29 +0900 | [diff] [blame] | 3560 | if (ehc->tries[dev->devno] == 1) { |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3561 | /* This is the last chance, better to slow |
| 3562 | * down than lose it. |
| 3563 | */ |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 3564 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
Tejun Heo | d89293a | 2009-01-29 20:31:29 +0900 | [diff] [blame] | 3565 | if (dev->pio_mode > XFER_PIO_0) |
| 3566 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3567 | } |
| 3568 | } |
| 3569 | |
| 3570 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { |
| 3571 | /* disable device if it has used up all its chances */ |
| 3572 | ata_dev_disable(dev); |
| 3573 | |
| 3574 | /* detach if offline */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 3575 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3576 | ata_eh_detach_dev(dev); |
| 3577 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3578 | /* schedule probe if necessary */ |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 3579 | if (ata_eh_schedule_probe(dev)) { |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3580 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 3581 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
| 3582 | sizeof(ehc->cmd_timeout_idx[dev->devno])); |
| 3583 | } |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3584 | |
| 3585 | return 1; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3586 | } else { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 3587 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3588 | return 0; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3589 | } |
| 3590 | } |
| 3591 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3592 | /** |
| 3593 | * ata_eh_recover - recover host port after error |
| 3594 | * @ap: host port to recover |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3595 | * @prereset: prereset method (can be NULL) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3596 | * @softreset: softreset method (can be NULL) |
| 3597 | * @hardreset: hardreset method (can be NULL) |
| 3598 | * @postreset: postreset method (can be NULL) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3599 | * @r_failed_link: out parameter for failed link |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3600 | * |
| 3601 | * This is the alpha and omega, eum and yang, heart and soul of |
| 3602 | * libata exception handling. On entry, actions required to |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3603 | * recover each link and hotplug requests are recorded in the |
| 3604 | * link's eh_context. This function executes all the operations |
| 3605 | * with appropriate retrials and fallbacks to resurrect failed |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3606 | * devices, detach goners and greet newcomers. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3607 | * |
| 3608 | * LOCKING: |
| 3609 | * Kernel thread context (may sleep). |
| 3610 | * |
| 3611 | * RETURNS: |
| 3612 | * 0 on success, -errno on failure. |
| 3613 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3614 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
| 3615 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
| 3616 | ata_postreset_fn_t postreset, |
| 3617 | struct ata_link **r_failed_link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3618 | { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3619 | struct ata_link *link; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3620 | struct ata_device *dev; |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3621 | int rc, nr_fails; |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3622 | unsigned long flags, deadline; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3623 | |
| 3624 | DPRINTK("ENTER\n"); |
| 3625 | |
| 3626 | /* prep for recovery */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3627 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3628 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3629 | |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 3630 | /* re-enable link? */ |
| 3631 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { |
| 3632 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); |
| 3633 | spin_lock_irqsave(ap->lock, flags); |
| 3634 | link->flags &= ~ATA_LFLAG_DISABLED; |
| 3635 | spin_unlock_irqrestore(ap->lock, flags); |
| 3636 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); |
| 3637 | } |
| 3638 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3639 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | fd995f7 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3640 | if (link->flags & ATA_LFLAG_NO_RETRY) |
| 3641 | ehc->tries[dev->devno] = 1; |
| 3642 | else |
| 3643 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
Tejun Heo | 79a55b7 | 2007-01-18 17:22:18 +0900 | [diff] [blame] | 3644 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3645 | /* collect port action mask recorded in dev actions */ |
| 3646 | ehc->i.action |= ehc->i.dev_action[dev->devno] & |
| 3647 | ~ATA_EH_PERDEV_MASK; |
| 3648 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3649 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3650 | /* process hotplug request */ |
| 3651 | if (dev->flags & ATA_DFLAG_DETACH) |
| 3652 | ata_eh_detach_dev(dev); |
| 3653 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3654 | /* schedule probe if necessary */ |
| 3655 | if (!ata_dev_enabled(dev)) |
| 3656 | ata_eh_schedule_probe(dev); |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3657 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3658 | } |
| 3659 | |
| 3660 | retry: |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3661 | rc = 0; |
| 3662 | |
Tejun Heo | aeb2ecd | 2006-06-12 14:11:43 +0900 | [diff] [blame] | 3663 | /* if UNLOADING, finish immediately */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 3664 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
Tejun Heo | aeb2ecd | 2006-06-12 14:11:43 +0900 | [diff] [blame] | 3665 | goto out; |
| 3666 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3667 | /* prep for EH */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3668 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3669 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3670 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3671 | /* skip EH if possible. */ |
| 3672 | if (ata_eh_skip_recovery(link)) |
| 3673 | ehc->i.action = 0; |
| 3674 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3675 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3676 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
| 3677 | } |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3678 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3679 | /* reset */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3680 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 3681 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3682 | |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 3683 | if (!(ehc->i.action & ATA_EH_RESET)) |
| 3684 | continue; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3685 | |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 3686 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
| 3687 | prereset, softreset, hardreset, postreset); |
| 3688 | if (rc) { |
| 3689 | ata_link_printk(link, KERN_ERR, |
| 3690 | "reset failed, giving up\n"); |
| 3691 | goto out; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3692 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3693 | } |
| 3694 | |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3695 | do { |
| 3696 | unsigned long now; |
| 3697 | |
| 3698 | /* |
| 3699 | * clears ATA_EH_PARK in eh_info and resets |
| 3700 | * ap->park_req_pending |
| 3701 | */ |
| 3702 | ata_eh_pull_park_action(ap); |
| 3703 | |
| 3704 | deadline = jiffies; |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3705 | ata_for_each_link(link, ap, EDGE) { |
| 3706 | ata_for_each_dev(dev, link, ALL) { |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3707 | struct ata_eh_context *ehc = &link->eh_context; |
| 3708 | unsigned long tmp; |
| 3709 | |
| 3710 | if (dev->class != ATA_DEV_ATA) |
| 3711 | continue; |
| 3712 | if (!(ehc->i.dev_action[dev->devno] & |
| 3713 | ATA_EH_PARK)) |
| 3714 | continue; |
| 3715 | tmp = dev->unpark_deadline; |
| 3716 | if (time_before(deadline, tmp)) |
| 3717 | deadline = tmp; |
| 3718 | else if (time_before_eq(tmp, jiffies)) |
| 3719 | continue; |
| 3720 | if (ehc->unloaded_mask & (1 << dev->devno)) |
| 3721 | continue; |
| 3722 | |
| 3723 | ata_eh_park_issue_cmd(dev, 1); |
| 3724 | } |
| 3725 | } |
| 3726 | |
| 3727 | now = jiffies; |
| 3728 | if (time_before_eq(deadline, now)) |
| 3729 | break; |
| 3730 | |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 3731 | ata_eh_release(ap); |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3732 | deadline = wait_for_completion_timeout(&ap->park_req_pending, |
| 3733 | deadline - now); |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 3734 | ata_eh_acquire(ap); |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3735 | } while (deadline); |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3736 | ata_for_each_link(link, ap, EDGE) { |
| 3737 | ata_for_each_dev(dev, link, ALL) { |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3738 | if (!(link->eh_context.unloaded_mask & |
| 3739 | (1 << dev->devno))) |
| 3740 | continue; |
| 3741 | |
| 3742 | ata_eh_park_issue_cmd(dev, 0); |
| 3743 | ata_eh_done(link, dev, ATA_EH_PARK); |
| 3744 | } |
| 3745 | } |
| 3746 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3747 | /* the rest */ |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3748 | nr_fails = 0; |
| 3749 | ata_for_each_link(link, ap, PMP_FIRST) { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3750 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3751 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3752 | if (sata_pmp_attached(ap) && ata_is_host_link(link)) |
| 3753 | goto config_lpm; |
| 3754 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3755 | /* revalidate existing devices and attach new ones */ |
| 3756 | rc = ata_eh_revalidate_and_attach(link, &dev); |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3757 | if (rc) |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3758 | goto rest_fail; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3759 | |
Tejun Heo | 633273a | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 3760 | /* if PMP got attached, return, pmp EH will take care of it */ |
| 3761 | if (link->device->class == ATA_DEV_PMP) { |
| 3762 | ehc->i.action = 0; |
| 3763 | return 0; |
| 3764 | } |
| 3765 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3766 | /* configure transfer mode if necessary */ |
| 3767 | if (ehc->i.flags & ATA_EHI_SETMODE) { |
| 3768 | rc = ata_set_mode(link, &dev); |
| 3769 | if (rc) |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3770 | goto rest_fail; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3771 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
| 3772 | } |
| 3773 | |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3774 | /* If reset has been issued, clear UA to avoid |
| 3775 | * disrupting the current users of the device. |
| 3776 | */ |
| 3777 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3778 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3779 | if (dev->class != ATA_DEV_ATAPI) |
| 3780 | continue; |
| 3781 | rc = atapi_eh_clear_ua(dev); |
| 3782 | if (rc) |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3783 | goto rest_fail; |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3784 | } |
| 3785 | } |
| 3786 | |
Tejun Heo | 6013efd | 2009-11-19 15:36:45 +0900 | [diff] [blame] | 3787 | /* retry flush if necessary */ |
| 3788 | ata_for_each_dev(dev, link, ALL) { |
| 3789 | if (dev->class != ATA_DEV_ATA) |
| 3790 | continue; |
| 3791 | rc = ata_eh_maybe_retry_flush(dev); |
| 3792 | if (rc) |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3793 | goto rest_fail; |
Tejun Heo | 6013efd | 2009-11-19 15:36:45 +0900 | [diff] [blame] | 3794 | } |
| 3795 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3796 | config_lpm: |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3797 | /* configure link power saving */ |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3798 | if (link->lpm_policy != ap->target_lpm_policy) { |
| 3799 | rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev); |
| 3800 | if (rc) |
| 3801 | goto rest_fail; |
| 3802 | } |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 3803 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3804 | /* this link is okay now */ |
| 3805 | ehc->i.flags = 0; |
| 3806 | continue; |
| 3807 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3808 | rest_fail: |
| 3809 | nr_fails++; |
| 3810 | if (dev) |
| 3811 | ata_eh_handle_dev_fail(dev, rc); |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3812 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 3813 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
| 3814 | /* PMP reset requires working host port. |
| 3815 | * Can't retry if it's frozen. |
| 3816 | */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 3817 | if (sata_pmp_attached(ap)) |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 3818 | goto out; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3819 | break; |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 3820 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3821 | } |
| 3822 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3823 | if (nr_fails) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3824 | goto retry; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3825 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3826 | out: |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3827 | if (rc && r_failed_link) |
| 3828 | *r_failed_link = link; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3829 | |
| 3830 | DPRINTK("EXIT, rc=%d\n", rc); |
| 3831 | return rc; |
| 3832 | } |
| 3833 | |
| 3834 | /** |
| 3835 | * ata_eh_finish - finish up EH |
| 3836 | * @ap: host port to finish EH for |
| 3837 | * |
| 3838 | * Recovery is complete. Clean up EH states and retry or finish |
| 3839 | * failed qcs. |
| 3840 | * |
| 3841 | * LOCKING: |
| 3842 | * None. |
| 3843 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3844 | void ata_eh_finish(struct ata_port *ap) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3845 | { |
| 3846 | int tag; |
| 3847 | |
| 3848 | /* retry or finish qcs */ |
| 3849 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 3850 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
| 3851 | |
| 3852 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
| 3853 | continue; |
| 3854 | |
| 3855 | if (qc->err_mask) { |
| 3856 | /* FIXME: Once EH migration is complete, |
| 3857 | * generate sense data in this function, |
| 3858 | * considering both err_mask and tf. |
| 3859 | */ |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 3860 | if (qc->flags & ATA_QCFLAG_RETRY) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3861 | ata_eh_qc_retry(qc); |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 3862 | else |
| 3863 | ata_eh_qc_complete(qc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3864 | } else { |
| 3865 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { |
| 3866 | ata_eh_qc_complete(qc); |
| 3867 | } else { |
| 3868 | /* feed zero TF to sense generation */ |
| 3869 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); |
| 3870 | ata_eh_qc_retry(qc); |
| 3871 | } |
| 3872 | } |
| 3873 | } |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3874 | |
| 3875 | /* make sure nr_active_links is zero after EH */ |
| 3876 | WARN_ON(ap->nr_active_links); |
| 3877 | ap->nr_active_links = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3878 | } |
| 3879 | |
| 3880 | /** |
| 3881 | * ata_do_eh - do standard error handling |
| 3882 | * @ap: host port to handle error for |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 3883 | * |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3884 | * @prereset: prereset method (can be NULL) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3885 | * @softreset: softreset method (can be NULL) |
| 3886 | * @hardreset: hardreset method (can be NULL) |
| 3887 | * @postreset: postreset method (can be NULL) |
| 3888 | * |
| 3889 | * Perform standard error handling sequence. |
| 3890 | * |
| 3891 | * LOCKING: |
| 3892 | * Kernel thread context (may sleep). |
| 3893 | */ |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3894 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
| 3895 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
| 3896 | ata_postreset_fn_t postreset) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3897 | { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3898 | struct ata_device *dev; |
| 3899 | int rc; |
| 3900 | |
| 3901 | ata_eh_autopsy(ap); |
| 3902 | ata_eh_report(ap); |
| 3903 | |
| 3904 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, |
| 3905 | NULL); |
| 3906 | if (rc) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3907 | ata_for_each_dev(dev, &ap->link, ALL) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3908 | ata_dev_disable(dev); |
| 3909 | } |
| 3910 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3911 | ata_eh_finish(ap); |
| 3912 | } |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3913 | |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 3914 | /** |
| 3915 | * ata_std_error_handler - standard error handler |
| 3916 | * @ap: host port to handle error for |
| 3917 | * |
| 3918 | * Standard error handler |
| 3919 | * |
| 3920 | * LOCKING: |
| 3921 | * Kernel thread context (may sleep). |
| 3922 | */ |
| 3923 | void ata_std_error_handler(struct ata_port *ap) |
| 3924 | { |
| 3925 | struct ata_port_operations *ops = ap->ops; |
| 3926 | ata_reset_fn_t hardreset = ops->hardreset; |
| 3927 | |
Tejun Heo | 57c9efd | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 3928 | /* ignore built-in hardreset if SCR access is not available */ |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 3929 | if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 3930 | hardreset = NULL; |
| 3931 | |
| 3932 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); |
| 3933 | } |
| 3934 | |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 3935 | #ifdef CONFIG_PM |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3936 | /** |
| 3937 | * ata_eh_handle_port_suspend - perform port suspend operation |
| 3938 | * @ap: port to suspend |
| 3939 | * |
| 3940 | * Suspend @ap. |
| 3941 | * |
| 3942 | * LOCKING: |
| 3943 | * Kernel thread context (may sleep). |
| 3944 | */ |
| 3945 | static void ata_eh_handle_port_suspend(struct ata_port *ap) |
| 3946 | { |
| 3947 | unsigned long flags; |
| 3948 | int rc = 0; |
| 3949 | |
| 3950 | /* are we suspending? */ |
| 3951 | spin_lock_irqsave(ap->lock, flags); |
| 3952 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || |
| 3953 | ap->pm_mesg.event == PM_EVENT_ON) { |
| 3954 | spin_unlock_irqrestore(ap->lock, flags); |
| 3955 | return; |
| 3956 | } |
| 3957 | spin_unlock_irqrestore(ap->lock, flags); |
| 3958 | |
| 3959 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); |
| 3960 | |
Tejun Heo | 64578a3 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3961 | /* tell ACPI we're suspending */ |
| 3962 | rc = ata_acpi_on_suspend(ap); |
| 3963 | if (rc) |
| 3964 | goto out; |
| 3965 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3966 | /* suspend */ |
| 3967 | ata_eh_freeze_port(ap); |
| 3968 | |
| 3969 | if (ap->ops->port_suspend) |
| 3970 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); |
| 3971 | |
Shaohua Li | bd3adca | 2007-11-02 09:32:38 +0800 | [diff] [blame] | 3972 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
Tejun Heo | 64578a3 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3973 | out: |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3974 | /* report result */ |
| 3975 | spin_lock_irqsave(ap->lock, flags); |
| 3976 | |
| 3977 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; |
| 3978 | if (rc == 0) |
| 3979 | ap->pflags |= ATA_PFLAG_SUSPENDED; |
Tejun Heo | 64578a3 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3980 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3981 | ata_port_schedule_eh(ap); |
| 3982 | |
| 3983 | if (ap->pm_result) { |
| 3984 | *ap->pm_result = rc; |
| 3985 | ap->pm_result = NULL; |
| 3986 | } |
| 3987 | |
| 3988 | spin_unlock_irqrestore(ap->lock, flags); |
| 3989 | |
| 3990 | return; |
| 3991 | } |
| 3992 | |
| 3993 | /** |
| 3994 | * ata_eh_handle_port_resume - perform port resume operation |
| 3995 | * @ap: port to resume |
| 3996 | * |
| 3997 | * Resume @ap. |
| 3998 | * |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3999 | * LOCKING: |
| 4000 | * Kernel thread context (may sleep). |
| 4001 | */ |
| 4002 | static void ata_eh_handle_port_resume(struct ata_port *ap) |
| 4003 | { |
Tejun Heo | 6f9c1ea | 2009-04-23 09:55:28 +0900 | [diff] [blame] | 4004 | struct ata_link *link; |
| 4005 | struct ata_device *dev; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 4006 | unsigned long flags; |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 4007 | int rc = 0; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 4008 | |
| 4009 | /* are we resuming? */ |
| 4010 | spin_lock_irqsave(ap->lock, flags); |
| 4011 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || |
| 4012 | ap->pm_mesg.event != PM_EVENT_ON) { |
| 4013 | spin_unlock_irqrestore(ap->lock, flags); |
| 4014 | return; |
| 4015 | } |
| 4016 | spin_unlock_irqrestore(ap->lock, flags); |
| 4017 | |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 4018 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 4019 | |
Tejun Heo | 6f9c1ea | 2009-04-23 09:55:28 +0900 | [diff] [blame] | 4020 | /* |
| 4021 | * Error timestamps are in jiffies which doesn't run while |
| 4022 | * suspended and PHY events during resume isn't too uncommon. |
| 4023 | * When the two are combined, it can lead to unnecessary speed |
| 4024 | * downs if the machine is suspended and resumed repeatedly. |
| 4025 | * Clear error history. |
| 4026 | */ |
| 4027 | ata_for_each_link(link, ap, HOST_FIRST) |
| 4028 | ata_for_each_dev(dev, link, ALL) |
| 4029 | ata_ering_clear(&dev->ering); |
| 4030 | |
Shaohua Li | bd3adca | 2007-11-02 09:32:38 +0800 | [diff] [blame] | 4031 | ata_acpi_set_state(ap, PMSG_ON); |
| 4032 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 4033 | if (ap->ops->port_resume) |
| 4034 | rc = ap->ops->port_resume(ap); |
| 4035 | |
Tejun Heo | 6746544 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 4036 | /* tell ACPI that we're resuming */ |
| 4037 | ata_acpi_on_resume(ap); |
| 4038 | |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 4039 | /* report result */ |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 4040 | spin_lock_irqsave(ap->lock, flags); |
| 4041 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); |
| 4042 | if (ap->pm_result) { |
| 4043 | *ap->pm_result = rc; |
| 4044 | ap->pm_result = NULL; |
| 4045 | } |
| 4046 | spin_unlock_irqrestore(ap->lock, flags); |
| 4047 | } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 4048 | #endif /* CONFIG_PM */ |