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 | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 590 | int i; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 591 | unsigned long flags; |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 592 | |
| 593 | DPRINTK("ENTER\n"); |
| 594 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 595 | /* make sure sff pio task is not running */ |
| 596 | ata_sff_flush_pio_task(ap); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 597 | |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 598 | /* synchronize with host lock and sort out timeouts */ |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 599 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 600 | /* For new EH, all qcs are finished in one of three ways - |
| 601 | * normal completion, error completion, and SCSI timeout. |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 602 | * Both completions can race against SCSI timeout. When normal |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 603 | * completion wins, the qc never reaches EH. When error |
| 604 | * completion wins, the qc has ATA_QCFLAG_FAILED set. |
| 605 | * |
| 606 | * When SCSI timeout wins, things are a bit more complex. |
| 607 | * Normal or error completion can occur after the timeout but |
| 608 | * before this point. In such cases, both types of |
| 609 | * completions are honored. A scmd is determined to have |
| 610 | * timed out iff its associated qc is active and not failed. |
| 611 | */ |
| 612 | if (ap->ops->error_handler) { |
| 613 | struct scsi_cmnd *scmd, *tmp; |
| 614 | int nr_timedout = 0; |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 615 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 616 | spin_lock_irqsave(ap->lock, flags); |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 617 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 618 | /* This must occur under the ap->lock as we don't want |
| 619 | a polled recovery to race the real interrupt handler |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 620 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 621 | The lost_interrupt handler checks for any completed but |
| 622 | non-notified command and completes much like an IRQ handler. |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 623 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 624 | We then fall into the error recovery code which will treat |
| 625 | this as if normal completion won the race */ |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 626 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 627 | if (ap->ops->lost_interrupt) |
| 628 | ap->ops->lost_interrupt(ap); |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 629 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 630 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { |
| 631 | struct ata_queued_cmd *qc; |
| 632 | |
| 633 | for (i = 0; i < ATA_MAX_QUEUE; i++) { |
| 634 | qc = __ata_qc_from_tag(ap, i); |
| 635 | if (qc->flags & ATA_QCFLAG_ACTIVE && |
| 636 | qc->scsicmd == scmd) |
| 637 | break; |
| 638 | } |
| 639 | |
| 640 | if (i < ATA_MAX_QUEUE) { |
| 641 | /* the scmd has an associated qc */ |
| 642 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { |
| 643 | /* which hasn't failed yet, timeout */ |
| 644 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 645 | qc->flags |= ATA_QCFLAG_FAILED; |
| 646 | nr_timedout++; |
| 647 | } |
| 648 | } else { |
| 649 | /* Normal completion occurred after |
| 650 | * SCSI timeout but before this point. |
| 651 | * Successfully complete it. |
| 652 | */ |
| 653 | scmd->retries = scmd->allowed; |
| 654 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | /* If we have timed out qcs. They belong to EH from |
| 659 | * this point but the state of the controller is |
| 660 | * unknown. Freeze the port to make sure the IRQ |
| 661 | * handler doesn't diddle with those qcs. This must |
| 662 | * be done atomically w.r.t. setting QCFLAG_FAILED. |
| 663 | */ |
| 664 | if (nr_timedout) |
| 665 | __ata_port_freeze(ap); |
| 666 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 667 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 668 | |
| 669 | /* initialize eh_tries */ |
| 670 | ap->eh_tries = ATA_EH_MAX_TRIES; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 671 | } else |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 672 | spin_unlock_wait(ap->lock); |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 673 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 674 | /* If we timed raced normal completion and there is nothing to |
| 675 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 676 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 677 | /* invoke error handler */ |
| 678 | if (ap->ops->error_handler) { |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 679 | struct ata_link *link; |
| 680 | |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 681 | /* acquire EH ownership */ |
| 682 | ata_eh_acquire(ap); |
| 683 | repeat: |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 684 | /* kill fast drain timer */ |
| 685 | del_timer_sync(&ap->fastdrain_timer); |
| 686 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 687 | /* process port resume request */ |
| 688 | ata_eh_handle_port_resume(ap); |
| 689 | |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 690 | /* fetch & clear EH info */ |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 691 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 692 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 693 | ata_for_each_link(link, ap, HOST_FIRST) { |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 694 | struct ata_eh_context *ehc = &link->eh_context; |
| 695 | struct ata_device *dev; |
| 696 | |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 697 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
| 698 | link->eh_context.i = link->eh_info; |
| 699 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 700 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 701 | ata_for_each_dev(dev, link, ENABLED) { |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 702 | int devno = dev->devno; |
| 703 | |
| 704 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; |
| 705 | if (ata_ncq_enabled(dev)) |
| 706 | ehc->saved_ncq_enabled |= 1 << devno; |
| 707 | } |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 708 | } |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 709 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 710 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
| 711 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 712 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 713 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 714 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 715 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 716 | /* invoke EH, skip if unloading or suspended */ |
| 717 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 718 | ap->ops->error_handler(ap); |
Tejun Heo | ece180d | 2008-11-03 20:04:37 +0900 | [diff] [blame] | 719 | else { |
| 720 | /* if unloading, commence suicide */ |
| 721 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && |
| 722 | !(ap->pflags & ATA_PFLAG_UNLOADED)) |
| 723 | ata_eh_unload(ap); |
Tejun Heo | 720ba12 | 2006-05-31 18:28:13 +0900 | [diff] [blame] | 724 | ata_eh_finish(ap); |
Tejun Heo | ece180d | 2008-11-03 20:04:37 +0900 | [diff] [blame] | 725 | } |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 726 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 727 | /* process port suspend request */ |
| 728 | ata_eh_handle_port_suspend(ap); |
| 729 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 730 | /* Exception might have happend after ->error_handler |
| 731 | * recovered the port but before this point. Repeat |
| 732 | * EH in such case. |
| 733 | */ |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 734 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 735 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 736 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 737 | if (--ap->eh_tries) { |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 738 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 739 | goto repeat; |
| 740 | } |
| 741 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 742 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
Tejun Heo | 914616a | 2007-06-25 21:47:11 +0900 | [diff] [blame] | 743 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 744 | } |
| 745 | |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 746 | /* this run is complete, make sure EH info is clear */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 747 | ata_for_each_link(link, ap, HOST_FIRST) |
Tejun Heo | cf1b86c | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 748 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
Tejun Heo | f3e81b1 | 2006-05-15 20:58:21 +0900 | [diff] [blame] | 749 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 750 | /* Clear host_eh_scheduled while holding ap->lock such |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 751 | * that if exception occurs after this point but |
| 752 | * before EH completion, SCSI midlayer will |
| 753 | * re-initiate EH. |
| 754 | */ |
| 755 | host->host_eh_scheduled = 0; |
| 756 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 757 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 758 | ata_eh_release(ap); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 759 | } else { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 760 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 761 | ap->ops->eng_timeout(ap); |
| 762 | } |
| 763 | |
| 764 | /* finish or retry handled scmd's and clean up */ |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 765 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
| 766 | |
| 767 | scsi_eh_flush_done_q(&ap->eh_done_q); |
| 768 | |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 769 | /* clean up */ |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 770 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 771 | |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 772 | if (ap->pflags & ATA_PFLAG_LOADING) |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 773 | ap->pflags &= ~ATA_PFLAG_LOADING; |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 774 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
Tejun Heo | ad72cf9 | 2010-07-02 10:03:52 +0200 | [diff] [blame] | 775 | schedule_delayed_work(&ap->hotplug_task, 0); |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 776 | |
| 777 | if (ap->pflags & ATA_PFLAG_RECOVERED) |
| 778 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); |
Tejun Heo | 580b2102 | 2006-05-31 18:28:05 +0900 | [diff] [blame] | 779 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 780 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 781 | |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 782 | /* tell wait_eh that we're done */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 783 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 784 | wake_up_all(&ap->eh_wait_q); |
| 785 | |
Tejun Heo | e30349d | 2006-07-03 03:02:15 +0900 | [diff] [blame] | 786 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ad9e276 | 2006-05-15 20:58:12 +0900 | [diff] [blame] | 787 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 788 | DPRINTK("EXIT\n"); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 789 | } |
| 790 | |
| 791 | /** |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 792 | * ata_port_wait_eh - Wait for the currently pending EH to complete |
| 793 | * @ap: Port to wait EH for |
| 794 | * |
| 795 | * Wait until the currently pending EH is complete. |
| 796 | * |
| 797 | * LOCKING: |
| 798 | * Kernel thread context (may sleep). |
| 799 | */ |
| 800 | void ata_port_wait_eh(struct ata_port *ap) |
| 801 | { |
| 802 | unsigned long flags; |
| 803 | DEFINE_WAIT(wait); |
| 804 | |
| 805 | retry: |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 806 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 807 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 808 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 809 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 810 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 811 | schedule(); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 812 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 813 | } |
Tejun Heo | 0a1b622 | 2006-06-11 11:01:38 +0900 | [diff] [blame] | 814 | finish_wait(&ap->eh_wait_q, &wait); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 815 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 816 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 817 | |
| 818 | /* make sure SCSI EH is complete */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 819 | if (scsi_host_in_recovery(ap->scsi_host)) { |
Tejun Heo | 97750ce | 2010-09-06 17:56:29 +0200 | [diff] [blame] | 820 | ata_msleep(ap, 10); |
Tejun Heo | c6cf9e9 | 2006-05-31 18:27:27 +0900 | [diff] [blame] | 821 | goto retry; |
| 822 | } |
| 823 | } |
| 824 | |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 825 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
| 826 | { |
| 827 | unsigned int tag; |
| 828 | int nr = 0; |
| 829 | |
| 830 | /* count only non-internal commands */ |
| 831 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) |
| 832 | if (ata_qc_from_tag(ap, tag)) |
| 833 | nr++; |
| 834 | |
| 835 | return nr; |
| 836 | } |
| 837 | |
| 838 | void ata_eh_fastdrain_timerfn(unsigned long arg) |
| 839 | { |
| 840 | struct ata_port *ap = (void *)arg; |
| 841 | unsigned long flags; |
| 842 | int cnt; |
| 843 | |
| 844 | spin_lock_irqsave(ap->lock, flags); |
| 845 | |
| 846 | cnt = ata_eh_nr_in_flight(ap); |
| 847 | |
| 848 | /* are we done? */ |
| 849 | if (!cnt) |
| 850 | goto out_unlock; |
| 851 | |
| 852 | if (cnt == ap->fastdrain_cnt) { |
| 853 | unsigned int tag; |
| 854 | |
| 855 | /* No progress during the last interval, tag all |
| 856 | * in-flight qcs as timed out and freeze the port. |
| 857 | */ |
| 858 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { |
| 859 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); |
| 860 | if (qc) |
| 861 | qc->err_mask |= AC_ERR_TIMEOUT; |
| 862 | } |
| 863 | |
| 864 | ata_port_freeze(ap); |
| 865 | } else { |
| 866 | /* some qcs have finished, give it another chance */ |
| 867 | ap->fastdrain_cnt = cnt; |
| 868 | ap->fastdrain_timer.expires = |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 869 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 870 | add_timer(&ap->fastdrain_timer); |
| 871 | } |
| 872 | |
| 873 | out_unlock: |
| 874 | spin_unlock_irqrestore(ap->lock, flags); |
| 875 | } |
| 876 | |
| 877 | /** |
| 878 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain |
| 879 | * @ap: target ATA port |
| 880 | * @fastdrain: activate fast drain |
| 881 | * |
| 882 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain |
| 883 | * is non-zero and EH wasn't pending before. Fast drain ensures |
| 884 | * that EH kicks in in timely manner. |
| 885 | * |
| 886 | * LOCKING: |
| 887 | * spin_lock_irqsave(host lock) |
| 888 | */ |
| 889 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) |
| 890 | { |
| 891 | int cnt; |
| 892 | |
| 893 | /* already scheduled? */ |
| 894 | if (ap->pflags & ATA_PFLAG_EH_PENDING) |
| 895 | return; |
| 896 | |
| 897 | ap->pflags |= ATA_PFLAG_EH_PENDING; |
| 898 | |
| 899 | if (!fastdrain) |
| 900 | return; |
| 901 | |
| 902 | /* do we have in-flight qcs? */ |
| 903 | cnt = ata_eh_nr_in_flight(ap); |
| 904 | if (!cnt) |
| 905 | return; |
| 906 | |
| 907 | /* activate fast drain */ |
| 908 | ap->fastdrain_cnt = cnt; |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 909 | ap->fastdrain_timer.expires = |
| 910 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 911 | add_timer(&ap->fastdrain_timer); |
| 912 | } |
| 913 | |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 914 | /** |
| 915 | * ata_qc_schedule_eh - schedule qc for error handling |
| 916 | * @qc: command to schedule error handling for |
| 917 | * |
| 918 | * Schedule error handling for @qc. EH will kick in as soon as |
| 919 | * other commands are drained. |
| 920 | * |
| 921 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 922 | * spin_lock_irqsave(host lock) |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 923 | */ |
| 924 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) |
| 925 | { |
| 926 | struct ata_port *ap = qc->ap; |
Tejun Heo | fa41efd | 2010-04-15 08:57:37 +0900 | [diff] [blame] | 927 | struct request_queue *q = qc->scsicmd->device->request_queue; |
| 928 | unsigned long flags; |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 929 | |
| 930 | WARN_ON(!ap->ops->error_handler); |
| 931 | |
| 932 | qc->flags |= ATA_QCFLAG_FAILED; |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 933 | ata_eh_set_pending(ap, 1); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 934 | |
| 935 | /* The following will fail if timeout has already expired. |
| 936 | * ata_scsi_error() takes care of such scmds on EH entry. |
| 937 | * Note that ATA_QCFLAG_FAILED is unconditionally set after |
| 938 | * this function completes. |
| 939 | */ |
Tejun Heo | fa41efd | 2010-04-15 08:57:37 +0900 | [diff] [blame] | 940 | spin_lock_irqsave(q->queue_lock, flags); |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 941 | blk_abort_request(qc->scsicmd->request); |
Tejun Heo | fa41efd | 2010-04-15 08:57:37 +0900 | [diff] [blame] | 942 | spin_unlock_irqrestore(q->queue_lock, flags); |
Tejun Heo | f686bcb | 2006-05-15 20:58:05 +0900 | [diff] [blame] | 943 | } |
| 944 | |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 945 | /** |
| 946 | * ata_port_schedule_eh - schedule error handling without a qc |
| 947 | * @ap: ATA port to schedule EH for |
| 948 | * |
| 949 | * Schedule error handling for @ap. EH will kick in as soon as |
| 950 | * all commands are drained. |
| 951 | * |
| 952 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 953 | * spin_lock_irqsave(host lock) |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 954 | */ |
| 955 | void ata_port_schedule_eh(struct ata_port *ap) |
| 956 | { |
| 957 | WARN_ON(!ap->ops->error_handler); |
| 958 | |
Tejun Heo | f4d6d00 | 2007-05-01 11:50:15 +0200 | [diff] [blame] | 959 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
| 960 | return; |
| 961 | |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 962 | ata_eh_set_pending(ap, 1); |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 963 | scsi_schedule_eh(ap->scsi_host); |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 964 | |
| 965 | DPRINTK("port EH scheduled\n"); |
| 966 | } |
| 967 | |
Tejun Heo | dbd8261 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 968 | 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] | 969 | { |
| 970 | int tag, nr_aborted = 0; |
| 971 | |
| 972 | WARN_ON(!ap->ops->error_handler); |
| 973 | |
Tejun Heo | 5ddf24c | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 974 | /* we're gonna abort all commands, no need for fast drain */ |
| 975 | ata_eh_set_pending(ap, 0); |
| 976 | |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 977 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 978 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); |
| 979 | |
Tejun Heo | dbd8261 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 980 | if (qc && (!link || qc->dev->link == link)) { |
Tejun Heo | 7b70fc0 | 2006-05-15 20:58:07 +0900 | [diff] [blame] | 981 | qc->flags |= ATA_QCFLAG_FAILED; |
| 982 | ata_qc_complete(qc); |
| 983 | nr_aborted++; |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | if (!nr_aborted) |
| 988 | ata_port_schedule_eh(ap); |
| 989 | |
| 990 | return nr_aborted; |
| 991 | } |
| 992 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 993 | /** |
Tejun Heo | dbd8261 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 994 | * ata_link_abort - abort all qc's on the link |
| 995 | * @link: ATA link to abort qc's for |
| 996 | * |
| 997 | * Abort all active qc's active on @link and schedule EH. |
| 998 | * |
| 999 | * LOCKING: |
| 1000 | * spin_lock_irqsave(host lock) |
| 1001 | * |
| 1002 | * RETURNS: |
| 1003 | * Number of aborted qc's. |
| 1004 | */ |
| 1005 | int ata_link_abort(struct ata_link *link) |
| 1006 | { |
| 1007 | return ata_do_link_abort(link->ap, link); |
| 1008 | } |
| 1009 | |
| 1010 | /** |
| 1011 | * ata_port_abort - abort all qc's on the port |
| 1012 | * @ap: ATA port to abort qc's for |
| 1013 | * |
| 1014 | * Abort all active qc's of @ap and schedule EH. |
| 1015 | * |
| 1016 | * LOCKING: |
| 1017 | * spin_lock_irqsave(host_set lock) |
| 1018 | * |
| 1019 | * RETURNS: |
| 1020 | * Number of aborted qc's. |
| 1021 | */ |
| 1022 | int ata_port_abort(struct ata_port *ap) |
| 1023 | { |
| 1024 | return ata_do_link_abort(ap, NULL); |
| 1025 | } |
| 1026 | |
| 1027 | /** |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1028 | * __ata_port_freeze - freeze port |
| 1029 | * @ap: ATA port to freeze |
| 1030 | * |
| 1031 | * This function is called when HSM violation or some other |
| 1032 | * condition disrupts normal operation of the port. Frozen port |
| 1033 | * is not allowed to perform any operation until the port is |
| 1034 | * thawed, which usually follows a successful reset. |
| 1035 | * |
| 1036 | * ap->ops->freeze() callback can be used for freezing the port |
| 1037 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a |
| 1038 | * port cannot be frozen hardware-wise, the interrupt handler |
| 1039 | * must ack and clear interrupts unconditionally while the port |
| 1040 | * is frozen. |
| 1041 | * |
| 1042 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 1043 | * spin_lock_irqsave(host lock) |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1044 | */ |
| 1045 | static void __ata_port_freeze(struct ata_port *ap) |
| 1046 | { |
| 1047 | WARN_ON(!ap->ops->error_handler); |
| 1048 | |
| 1049 | if (ap->ops->freeze) |
| 1050 | ap->ops->freeze(ap); |
| 1051 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1052 | ap->pflags |= ATA_PFLAG_FROZEN; |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1053 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1054 | DPRINTK("ata%u port frozen\n", ap->print_id); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1055 | } |
| 1056 | |
| 1057 | /** |
| 1058 | * ata_port_freeze - abort & freeze port |
| 1059 | * @ap: ATA port to freeze |
| 1060 | * |
Jeff Garzik | 54c3844 | 2009-04-07 19:13:15 -0400 | [diff] [blame] | 1061 | * Abort and freeze @ap. The freeze operation must be called |
| 1062 | * first, because some hardware requires special operations |
| 1063 | * before the taskfile registers are accessible. |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1064 | * |
| 1065 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 1066 | * spin_lock_irqsave(host lock) |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1067 | * |
| 1068 | * RETURNS: |
| 1069 | * Number of aborted commands. |
| 1070 | */ |
| 1071 | int ata_port_freeze(struct ata_port *ap) |
| 1072 | { |
| 1073 | int nr_aborted; |
| 1074 | |
| 1075 | WARN_ON(!ap->ops->error_handler); |
| 1076 | |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1077 | __ata_port_freeze(ap); |
Jeff Garzik | 54c3844 | 2009-04-07 19:13:15 -0400 | [diff] [blame] | 1078 | nr_aborted = ata_port_abort(ap); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1079 | |
| 1080 | return nr_aborted; |
| 1081 | } |
| 1082 | |
| 1083 | /** |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1084 | * sata_async_notification - SATA async notification handler |
| 1085 | * @ap: ATA port where async notification is received |
| 1086 | * |
| 1087 | * Handler to be called when async notification via SDB FIS is |
| 1088 | * received. This function schedules EH if necessary. |
| 1089 | * |
| 1090 | * LOCKING: |
| 1091 | * spin_lock_irqsave(host lock) |
| 1092 | * |
| 1093 | * RETURNS: |
| 1094 | * 1 if EH is scheduled, 0 otherwise. |
| 1095 | */ |
| 1096 | int sata_async_notification(struct ata_port *ap) |
| 1097 | { |
| 1098 | u32 sntf; |
| 1099 | int rc; |
| 1100 | |
| 1101 | if (!(ap->flags & ATA_FLAG_AN)) |
| 1102 | return 0; |
| 1103 | |
| 1104 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); |
| 1105 | if (rc == 0) |
| 1106 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); |
| 1107 | |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 1108 | if (!sata_pmp_attached(ap) || rc) { |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1109 | /* PMP is not attached or SNTF is not available */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 1110 | if (!sata_pmp_attached(ap)) { |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1111 | /* PMP is not attached. Check whether ATAPI |
| 1112 | * AN is configured. If so, notify media |
| 1113 | * change. |
| 1114 | */ |
| 1115 | struct ata_device *dev = ap->link.device; |
| 1116 | |
| 1117 | if ((dev->class == ATA_DEV_ATAPI) && |
| 1118 | (dev->flags & ATA_DFLAG_AN)) |
| 1119 | ata_scsi_media_change_notify(dev); |
| 1120 | return 0; |
| 1121 | } else { |
| 1122 | /* PMP is attached but SNTF is not available. |
| 1123 | * ATAPI async media change notification is |
| 1124 | * not used. The PMP must be reporting PHY |
| 1125 | * status change, schedule EH. |
| 1126 | */ |
| 1127 | ata_port_schedule_eh(ap); |
| 1128 | return 1; |
| 1129 | } |
| 1130 | } else { |
| 1131 | /* PMP is attached and SNTF is available */ |
| 1132 | struct ata_link *link; |
| 1133 | |
| 1134 | /* check and notify ATAPI AN */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 1135 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 7d77b24 | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1136 | if (!(sntf & (1 << link->pmp))) |
| 1137 | continue; |
| 1138 | |
| 1139 | if ((link->device->class == ATA_DEV_ATAPI) && |
| 1140 | (link->device->flags & ATA_DFLAG_AN)) |
| 1141 | ata_scsi_media_change_notify(link->device); |
| 1142 | } |
| 1143 | |
| 1144 | /* If PMP is reporting that PHY status of some |
| 1145 | * downstream ports has changed, schedule EH. |
| 1146 | */ |
| 1147 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { |
| 1148 | ata_port_schedule_eh(ap); |
| 1149 | return 1; |
| 1150 | } |
| 1151 | |
| 1152 | return 0; |
| 1153 | } |
| 1154 | } |
| 1155 | |
| 1156 | /** |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1157 | * ata_eh_freeze_port - EH helper to freeze port |
| 1158 | * @ap: ATA port to freeze |
| 1159 | * |
| 1160 | * Freeze @ap. |
| 1161 | * |
| 1162 | * LOCKING: |
| 1163 | * None. |
| 1164 | */ |
| 1165 | void ata_eh_freeze_port(struct ata_port *ap) |
| 1166 | { |
| 1167 | unsigned long flags; |
| 1168 | |
| 1169 | if (!ap->ops->error_handler) |
| 1170 | return; |
| 1171 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1172 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1173 | __ata_port_freeze(ap); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1174 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1175 | } |
| 1176 | |
| 1177 | /** |
| 1178 | * ata_port_thaw_port - EH helper to thaw port |
| 1179 | * @ap: ATA port to thaw |
| 1180 | * |
| 1181 | * Thaw frozen port @ap. |
| 1182 | * |
| 1183 | * LOCKING: |
| 1184 | * None. |
| 1185 | */ |
| 1186 | void ata_eh_thaw_port(struct ata_port *ap) |
| 1187 | { |
| 1188 | unsigned long flags; |
| 1189 | |
| 1190 | if (!ap->ops->error_handler) |
| 1191 | return; |
| 1192 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1193 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1194 | |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1195 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1196 | |
| 1197 | if (ap->ops->thaw) |
| 1198 | ap->ops->thaw(ap); |
| 1199 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1200 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1201 | |
Tejun Heo | 44877b4 | 2007-02-21 01:06:51 +0900 | [diff] [blame] | 1202 | DPRINTK("ata%u port thawed\n", ap->print_id); |
Tejun Heo | e318049 | 2006-05-15 20:58:09 +0900 | [diff] [blame] | 1203 | } |
| 1204 | |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1205 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
| 1206 | { |
| 1207 | /* nada */ |
| 1208 | } |
| 1209 | |
| 1210 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) |
| 1211 | { |
| 1212 | struct ata_port *ap = qc->ap; |
| 1213 | struct scsi_cmnd *scmd = qc->scsicmd; |
| 1214 | unsigned long flags; |
| 1215 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1216 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1217 | qc->scsidone = ata_eh_scsidone; |
| 1218 | __ata_qc_complete(qc); |
| 1219 | WARN_ON(ata_tag_valid(qc->tag)); |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1220 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | ece1d63 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1221 | |
| 1222 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); |
| 1223 | } |
| 1224 | |
| 1225 | /** |
| 1226 | * ata_eh_qc_complete - Complete an active ATA command from EH |
| 1227 | * @qc: Command to complete |
| 1228 | * |
| 1229 | * Indicate to the mid and upper layers that an ATA command has |
| 1230 | * completed. To be used from EH. |
| 1231 | */ |
| 1232 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) |
| 1233 | { |
| 1234 | struct scsi_cmnd *scmd = qc->scsicmd; |
| 1235 | scmd->retries = scmd->allowed; |
| 1236 | __ata_eh_qc_complete(qc); |
| 1237 | } |
| 1238 | |
| 1239 | /** |
| 1240 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH |
| 1241 | * @qc: Command to retry |
| 1242 | * |
| 1243 | * Indicate to the mid and upper layers that an ATA command |
| 1244 | * should be retried. To be used from EH. |
| 1245 | * |
| 1246 | * SCSI midlayer limits the number of retries to scmd->allowed. |
| 1247 | * scmd->retries is decremented for commands which get retried |
| 1248 | * due to unrelated failures (qc->err_mask is zero). |
| 1249 | */ |
| 1250 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) |
| 1251 | { |
| 1252 | struct scsi_cmnd *scmd = qc->scsicmd; |
| 1253 | if (!qc->err_mask && scmd->retries) |
| 1254 | scmd->retries--; |
| 1255 | __ata_eh_qc_complete(qc); |
| 1256 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1257 | |
| 1258 | /** |
Tejun Heo | 678afac | 2009-01-29 20:31:30 +0900 | [diff] [blame] | 1259 | * ata_dev_disable - disable ATA device |
| 1260 | * @dev: ATA device to disable |
| 1261 | * |
| 1262 | * Disable @dev. |
| 1263 | * |
| 1264 | * Locking: |
| 1265 | * EH context. |
| 1266 | */ |
| 1267 | void ata_dev_disable(struct ata_device *dev) |
| 1268 | { |
| 1269 | if (!ata_dev_enabled(dev)) |
| 1270 | return; |
| 1271 | |
| 1272 | if (ata_msg_drv(dev->link->ap)) |
| 1273 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
| 1274 | ata_acpi_on_disable(dev); |
| 1275 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); |
| 1276 | dev->class++; |
Tejun Heo | 99cf610 | 2009-01-29 20:31:32 +0900 | [diff] [blame] | 1277 | |
| 1278 | /* From now till the next successful probe, ering is used to |
| 1279 | * track probe failures. Clear accumulated device error info. |
| 1280 | */ |
| 1281 | ata_ering_clear(&dev->ering); |
Tejun Heo | 678afac | 2009-01-29 20:31:30 +0900 | [diff] [blame] | 1282 | } |
| 1283 | |
| 1284 | /** |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1285 | * ata_eh_detach_dev - detach ATA device |
| 1286 | * @dev: ATA device to detach |
| 1287 | * |
| 1288 | * Detach @dev. |
| 1289 | * |
| 1290 | * LOCKING: |
| 1291 | * None. |
| 1292 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1293 | void ata_eh_detach_dev(struct ata_device *dev) |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1294 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1295 | struct ata_link *link = dev->link; |
| 1296 | struct ata_port *ap = link->ap; |
Tejun Heo | 90484eb | 2008-10-26 15:43:03 +0900 | [diff] [blame] | 1297 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1298 | unsigned long flags; |
| 1299 | |
| 1300 | ata_dev_disable(dev); |
| 1301 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1302 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1303 | |
| 1304 | dev->flags &= ~ATA_DFLAG_DETACH; |
| 1305 | |
| 1306 | if (ata_scsi_offline_dev(dev)) { |
| 1307 | dev->flags |= ATA_DFLAG_DETACHED; |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1308 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1309 | } |
| 1310 | |
Tejun Heo | 90484eb | 2008-10-26 15:43:03 +0900 | [diff] [blame] | 1311 | /* clear per-dev EH info */ |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1312 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
| 1313 | 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] | 1314 | ehc->saved_xfer_mode[dev->devno] = 0; |
| 1315 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); |
Tejun Heo | beb07c1 | 2006-06-24 20:30:19 +0900 | [diff] [blame] | 1316 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1317 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 1318 | } |
| 1319 | |
| 1320 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1321 | * ata_eh_about_to_do - about to perform eh_action |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1322 | * @link: target ATA link |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1323 | * @dev: target ATA dev for per-dev action (can be NULL) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1324 | * @action: action about to be performed |
| 1325 | * |
| 1326 | * Called just before performing EH actions to clear related bits |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1327 | * in @link->eh_info such that eh actions are not unnecessarily |
| 1328 | * repeated. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1329 | * |
| 1330 | * LOCKING: |
| 1331 | * None. |
| 1332 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1333 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
| 1334 | unsigned int action) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1335 | { |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1336 | struct ata_port *ap = link->ap; |
| 1337 | struct ata_eh_info *ehi = &link->eh_info; |
| 1338 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1339 | unsigned long flags; |
| 1340 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1341 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 1342 | |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1343 | ata_eh_clear_action(link, dev, ehi, action); |
Tejun Heo | 13abf50 | 2006-07-10 23:18:46 +0900 | [diff] [blame] | 1344 | |
Tejun Heo | a568d1d | 2008-10-21 20:37:21 +0900 | [diff] [blame] | 1345 | /* About to take EH action, set RECOVERED. Ignore actions on |
| 1346 | * slave links as master will do them again. |
| 1347 | */ |
| 1348 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 1349 | ap->pflags |= ATA_PFLAG_RECOVERED; |
| 1350 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 1351 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1352 | } |
| 1353 | |
| 1354 | /** |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1355 | * ata_eh_done - EH action complete |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1356 | * @ap: target ATA port |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1357 | * @dev: target ATA dev for per-dev action (can be NULL) |
| 1358 | * @action: action just completed |
| 1359 | * |
| 1360 | * Called right after performing EH actions to clear related bits |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1361 | * in @link->eh_context. |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1362 | * |
| 1363 | * LOCKING: |
| 1364 | * None. |
| 1365 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 1366 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
| 1367 | unsigned int action) |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1368 | { |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1369 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1370 | |
Tejun Heo | 955e57d | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1371 | ata_eh_clear_action(link, dev, &ehc->i, action); |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 1372 | } |
| 1373 | |
| 1374 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1375 | * ata_err_string - convert err_mask to descriptive string |
| 1376 | * @err_mask: error mask to convert to string |
| 1377 | * |
| 1378 | * Convert @err_mask to descriptive string. Errors are |
| 1379 | * prioritized according to severity and only the most severe |
| 1380 | * error is reported. |
| 1381 | * |
| 1382 | * LOCKING: |
| 1383 | * None. |
| 1384 | * |
| 1385 | * RETURNS: |
| 1386 | * Descriptive string for @err_mask |
| 1387 | */ |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 1388 | static const char *ata_err_string(unsigned int err_mask) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1389 | { |
| 1390 | if (err_mask & AC_ERR_HOST_BUS) |
| 1391 | return "host bus error"; |
| 1392 | if (err_mask & AC_ERR_ATA_BUS) |
| 1393 | return "ATA bus error"; |
| 1394 | if (err_mask & AC_ERR_TIMEOUT) |
| 1395 | return "timeout"; |
| 1396 | if (err_mask & AC_ERR_HSM) |
| 1397 | return "HSM violation"; |
| 1398 | if (err_mask & AC_ERR_SYSTEM) |
| 1399 | return "internal error"; |
| 1400 | if (err_mask & AC_ERR_MEDIA) |
| 1401 | return "media error"; |
| 1402 | if (err_mask & AC_ERR_INVALID) |
| 1403 | return "invalid argument"; |
| 1404 | if (err_mask & AC_ERR_DEV) |
| 1405 | return "device error"; |
| 1406 | return "unknown error"; |
| 1407 | } |
| 1408 | |
| 1409 | /** |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1410 | * ata_read_log_page - read a specific log page |
| 1411 | * @dev: target device |
| 1412 | * @page: page to read |
| 1413 | * @buf: buffer to store read page |
| 1414 | * @sectors: number of sectors to read |
| 1415 | * |
| 1416 | * Read log page using READ_LOG_EXT command. |
| 1417 | * |
| 1418 | * LOCKING: |
| 1419 | * Kernel thread context (may sleep). |
| 1420 | * |
| 1421 | * RETURNS: |
| 1422 | * 0 on success, AC_ERR_* mask otherwise. |
| 1423 | */ |
| 1424 | static unsigned int ata_read_log_page(struct ata_device *dev, |
| 1425 | u8 page, void *buf, unsigned int sectors) |
| 1426 | { |
| 1427 | struct ata_taskfile tf; |
| 1428 | unsigned int err_mask; |
| 1429 | |
| 1430 | DPRINTK("read log page - page %d\n", page); |
| 1431 | |
| 1432 | ata_tf_init(dev, &tf); |
| 1433 | tf.command = ATA_CMD_READ_LOG_EXT; |
| 1434 | tf.lbal = page; |
| 1435 | tf.nsect = sectors; |
| 1436 | tf.hob_nsect = sectors >> 8; |
| 1437 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; |
| 1438 | tf.protocol = ATA_PROT_PIO; |
| 1439 | |
| 1440 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1441 | buf, sectors * ATA_SECT_SIZE, 0); |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1442 | |
| 1443 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| 1444 | return err_mask; |
| 1445 | } |
| 1446 | |
| 1447 | /** |
| 1448 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details |
| 1449 | * @dev: Device to read log page 10h from |
| 1450 | * @tag: Resulting tag of the failed command |
| 1451 | * @tf: Resulting taskfile registers of the failed command |
| 1452 | * |
| 1453 | * Read log page 10h to obtain NCQ error details and clear error |
| 1454 | * condition. |
| 1455 | * |
| 1456 | * LOCKING: |
| 1457 | * Kernel thread context (may sleep). |
| 1458 | * |
| 1459 | * RETURNS: |
| 1460 | * 0 on success, -errno otherwise. |
| 1461 | */ |
| 1462 | static int ata_eh_read_log_10h(struct ata_device *dev, |
| 1463 | int *tag, struct ata_taskfile *tf) |
| 1464 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1465 | u8 *buf = dev->link->ap->sector_buf; |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1466 | unsigned int err_mask; |
| 1467 | u8 csum; |
| 1468 | int i; |
| 1469 | |
| 1470 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); |
| 1471 | if (err_mask) |
| 1472 | return -EIO; |
| 1473 | |
| 1474 | csum = 0; |
| 1475 | for (i = 0; i < ATA_SECT_SIZE; i++) |
| 1476 | csum += buf[i]; |
| 1477 | if (csum) |
| 1478 | ata_dev_printk(dev, KERN_WARNING, |
| 1479 | "invalid checksum 0x%x on log page 10h\n", csum); |
| 1480 | |
| 1481 | if (buf[0] & 0x80) |
| 1482 | return -ENOENT; |
| 1483 | |
| 1484 | *tag = buf[0] & 0x1f; |
| 1485 | |
| 1486 | tf->command = buf[2]; |
| 1487 | tf->feature = buf[3]; |
| 1488 | tf->lbal = buf[4]; |
| 1489 | tf->lbam = buf[5]; |
| 1490 | tf->lbah = buf[6]; |
| 1491 | tf->device = buf[7]; |
| 1492 | tf->hob_lbal = buf[8]; |
| 1493 | tf->hob_lbam = buf[9]; |
| 1494 | tf->hob_lbah = buf[10]; |
| 1495 | tf->nsect = buf[12]; |
| 1496 | tf->hob_nsect = buf[13]; |
| 1497 | |
| 1498 | return 0; |
| 1499 | } |
| 1500 | |
| 1501 | /** |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 1502 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY |
| 1503 | * @dev: target ATAPI device |
| 1504 | * @r_sense_key: out parameter for sense_key |
| 1505 | * |
| 1506 | * Perform ATAPI TEST_UNIT_READY. |
| 1507 | * |
| 1508 | * LOCKING: |
| 1509 | * EH context (may sleep). |
| 1510 | * |
| 1511 | * RETURNS: |
| 1512 | * 0 on success, AC_ERR_* mask on failure. |
| 1513 | */ |
| 1514 | static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) |
| 1515 | { |
| 1516 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; |
| 1517 | struct ata_taskfile tf; |
| 1518 | unsigned int err_mask; |
| 1519 | |
| 1520 | ata_tf_init(dev, &tf); |
| 1521 | |
| 1522 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1523 | tf.command = ATA_CMD_PACKET; |
| 1524 | tf.protocol = ATAPI_PROT_NODATA; |
| 1525 | |
| 1526 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); |
| 1527 | if (err_mask == AC_ERR_DEV) |
| 1528 | *r_sense_key = tf.feature >> 4; |
| 1529 | return err_mask; |
| 1530 | } |
| 1531 | |
| 1532 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1533 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE |
| 1534 | * @dev: device to perform REQUEST_SENSE to |
| 1535 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1536 | * @dfl_sense_key: default sense key to use |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1537 | * |
| 1538 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK |
| 1539 | * SENSE. This function is EH helper. |
| 1540 | * |
| 1541 | * LOCKING: |
| 1542 | * Kernel thread context (may sleep). |
| 1543 | * |
| 1544 | * RETURNS: |
| 1545 | * 0 on success, AC_ERR_* mask on failure |
| 1546 | */ |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1547 | static unsigned int atapi_eh_request_sense(struct ata_device *dev, |
| 1548 | u8 *sense_buf, u8 dfl_sense_key) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1549 | { |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1550 | u8 cdb[ATAPI_CDB_LEN] = |
| 1551 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 1552 | struct ata_port *ap = dev->link->ap; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1553 | struct ata_taskfile tf; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1554 | |
| 1555 | DPRINTK("ATAPI request sense\n"); |
| 1556 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1557 | /* FIXME: is this needed? */ |
| 1558 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
| 1559 | |
Albert Lee | 5628776 | 2007-04-02 11:30:46 +0800 | [diff] [blame] | 1560 | /* initialize sense_buf with the error register, |
| 1561 | * for the case where they are -not- overwritten |
| 1562 | */ |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1563 | sense_buf[0] = 0x70; |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1564 | sense_buf[2] = dfl_sense_key; |
Albert Lee | 5628776 | 2007-04-02 11:30:46 +0800 | [diff] [blame] | 1565 | |
Jeff Garzik | a617c09 | 2007-05-21 20:14:23 -0400 | [diff] [blame] | 1566 | /* some devices time out if garbage left in tf */ |
Albert Lee | 5628776 | 2007-04-02 11:30:46 +0800 | [diff] [blame] | 1567 | ata_tf_init(dev, &tf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1568 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1569 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1570 | tf.command = ATA_CMD_PACKET; |
| 1571 | |
| 1572 | /* is it pointless to prefer PIO for "safety reasons"? */ |
| 1573 | if (ap->flags & ATA_FLAG_PIO_DMA) { |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 1574 | tf.protocol = ATAPI_PROT_DMA; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1575 | tf.feature |= ATAPI_PKT_DMA; |
| 1576 | } else { |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 1577 | tf.protocol = ATAPI_PROT_PIO; |
Tejun Heo | f2dfc1a | 2007-12-12 12:12:46 +0900 | [diff] [blame] | 1578 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
| 1579 | tf.lbah = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1580 | } |
| 1581 | |
| 1582 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, |
Tejun Heo | 2b78910 | 2007-10-09 15:05:44 +0900 | [diff] [blame] | 1583 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1584 | } |
| 1585 | |
| 1586 | /** |
| 1587 | * ata_eh_analyze_serror - analyze SError for a failed port |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1588 | * @link: ATA link to analyze SError for |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1589 | * |
| 1590 | * Analyze SError if available and further determine cause of |
| 1591 | * failure. |
| 1592 | * |
| 1593 | * LOCKING: |
| 1594 | * None. |
| 1595 | */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1596 | static void ata_eh_analyze_serror(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1597 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1598 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1599 | u32 serror = ehc->i.serror; |
| 1600 | unsigned int err_mask = 0, action = 0; |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1601 | u32 hotplug_mask; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1602 | |
Tejun Heo | e0614db | 2008-05-19 01:15:09 +0900 | [diff] [blame] | 1603 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1604 | err_mask |= AC_ERR_ATA_BUS; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1605 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1606 | } |
| 1607 | if (serror & SERR_PROTOCOL) { |
| 1608 | err_mask |= AC_ERR_HSM; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1609 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1610 | } |
| 1611 | if (serror & SERR_INTERNAL) { |
| 1612 | err_mask |= AC_ERR_SYSTEM; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1613 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1614 | } |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1615 | |
| 1616 | /* Determine whether a hotplug event has occurred. Both |
| 1617 | * SError.N/X are considered hotplug events for enabled or |
| 1618 | * host links. For disabled PMP links, only N bit is |
| 1619 | * considered as X bit is left at 1 for link plugging. |
| 1620 | */ |
Tejun Heo | eb0e85e | 2011-02-24 19:30:37 +0100 | [diff] [blame^] | 1621 | if (link->lpm_policy > ATA_LPM_MAX_POWER) |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 1622 | hotplug_mask = 0; /* hotplug doesn't work w/ LPM */ |
| 1623 | else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 1624 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
| 1625 | else |
| 1626 | hotplug_mask = SERR_PHYRDY_CHG; |
| 1627 | |
| 1628 | if (serror & hotplug_mask) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 1629 | ata_ehi_hotplugged(&ehc->i); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1630 | |
| 1631 | ehc->i.err_mask |= err_mask; |
| 1632 | ehc->i.action |= action; |
| 1633 | } |
| 1634 | |
| 1635 | /** |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1636 | * ata_eh_analyze_ncq_error - analyze NCQ error |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1637 | * @link: ATA link to analyze NCQ error for |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1638 | * |
| 1639 | * Read log page 10h, determine the offending qc and acquire |
| 1640 | * error status TF. For NCQ device errors, all LLDDs have to do |
| 1641 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes |
| 1642 | * care of the rest. |
| 1643 | * |
| 1644 | * LOCKING: |
| 1645 | * Kernel thread context (may sleep). |
| 1646 | */ |
Mark Lord | 10acf3b | 2008-05-02 02:14:53 -0400 | [diff] [blame] | 1647 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1648 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1649 | struct ata_port *ap = link->ap; |
| 1650 | struct ata_eh_context *ehc = &link->eh_context; |
| 1651 | struct ata_device *dev = link->device; |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1652 | struct ata_queued_cmd *qc; |
| 1653 | struct ata_taskfile tf; |
| 1654 | int tag, rc; |
| 1655 | |
| 1656 | /* if frozen, we can't do much */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 1657 | if (ap->pflags & ATA_PFLAG_FROZEN) |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1658 | return; |
| 1659 | |
| 1660 | /* is it NCQ device error? */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1661 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1662 | return; |
| 1663 | |
| 1664 | /* has LLDD analyzed already? */ |
| 1665 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 1666 | qc = __ata_qc_from_tag(ap, tag); |
| 1667 | |
| 1668 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
| 1669 | continue; |
| 1670 | |
| 1671 | if (qc->err_mask) |
| 1672 | return; |
| 1673 | } |
| 1674 | |
| 1675 | /* okay, this error is ours */ |
Jeff Garzik | a09bf4c | 2010-04-22 21:59:13 -0400 | [diff] [blame] | 1676 | memset(&tf, 0, sizeof(tf)); |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1677 | rc = ata_eh_read_log_10h(dev, &tag, &tf); |
| 1678 | if (rc) { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1679 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1680 | "(errno=%d)\n", rc); |
| 1681 | return; |
| 1682 | } |
| 1683 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 1684 | if (!(link->sactive & (1 << tag))) { |
| 1685 | ata_link_printk(link, KERN_ERR, "log page 10h reported " |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1686 | "inactive tag %d\n", tag); |
| 1687 | return; |
| 1688 | } |
| 1689 | |
| 1690 | /* we've got the perpetrator, condemn it */ |
| 1691 | qc = __ata_qc_from_tag(ap, tag); |
| 1692 | memcpy(&qc->result_tf, &tf, sizeof(tf)); |
Mark Lord | a6116c9 | 2008-04-23 22:36:25 -0400 | [diff] [blame] | 1693 | 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] | 1694 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 1695 | ehc->i.err_mask &= ~AC_ERR_DEV; |
| 1696 | } |
| 1697 | |
| 1698 | /** |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1699 | * ata_eh_analyze_tf - analyze taskfile of a failed qc |
| 1700 | * @qc: qc to analyze |
| 1701 | * @tf: Taskfile registers to analyze |
| 1702 | * |
| 1703 | * Analyze taskfile of @qc and further determine cause of |
| 1704 | * failure. This function also requests ATAPI sense data if |
| 1705 | * avaliable. |
| 1706 | * |
| 1707 | * LOCKING: |
| 1708 | * Kernel thread context (may sleep). |
| 1709 | * |
| 1710 | * RETURNS: |
| 1711 | * Determined recovery action |
| 1712 | */ |
| 1713 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, |
| 1714 | const struct ata_taskfile *tf) |
| 1715 | { |
| 1716 | unsigned int tmp, action = 0; |
| 1717 | u8 stat = tf->command, err = tf->feature; |
| 1718 | |
| 1719 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { |
| 1720 | qc->err_mask |= AC_ERR_HSM; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1721 | return ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1722 | } |
| 1723 | |
Tejun Heo | a51d644 | 2007-03-20 15:24:11 +0900 | [diff] [blame] | 1724 | if (stat & (ATA_ERR | ATA_DF)) |
| 1725 | qc->err_mask |= AC_ERR_DEV; |
| 1726 | else |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1727 | return 0; |
| 1728 | |
| 1729 | switch (qc->dev->class) { |
| 1730 | case ATA_DEV_ATA: |
| 1731 | if (err & ATA_ICRC) |
| 1732 | qc->err_mask |= AC_ERR_ATA_BUS; |
| 1733 | if (err & ATA_UNC) |
| 1734 | qc->err_mask |= AC_ERR_MEDIA; |
| 1735 | if (err & ATA_IDNF) |
| 1736 | qc->err_mask |= AC_ERR_INVALID; |
| 1737 | break; |
| 1738 | |
| 1739 | case ATA_DEV_ATAPI: |
Tejun Heo | a569a30 | 2006-11-21 10:40:51 +0900 | [diff] [blame] | 1740 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
Tejun Heo | 3eabddb | 2008-06-10 18:28:05 +0900 | [diff] [blame] | 1741 | tmp = atapi_eh_request_sense(qc->dev, |
| 1742 | qc->scsicmd->sense_buffer, |
| 1743 | qc->result_tf.feature >> 4); |
Tejun Heo | a569a30 | 2006-11-21 10:40:51 +0900 | [diff] [blame] | 1744 | if (!tmp) { |
| 1745 | /* ATA_QCFLAG_SENSE_VALID is used to |
| 1746 | * tell atapi_qc_complete() that sense |
| 1747 | * data is already valid. |
| 1748 | * |
| 1749 | * TODO: interpret sense data and set |
| 1750 | * appropriate err_mask. |
| 1751 | */ |
| 1752 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
| 1753 | } else |
| 1754 | qc->err_mask |= tmp; |
| 1755 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1756 | } |
| 1757 | |
| 1758 | 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] | 1759 | action |= ATA_EH_RESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1760 | |
| 1761 | return action; |
| 1762 | } |
| 1763 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1764 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
| 1765 | int *xfer_ok) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1766 | { |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1767 | int base = 0; |
| 1768 | |
| 1769 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) |
| 1770 | *xfer_ok = 1; |
| 1771 | |
| 1772 | if (!*xfer_ok) |
Tejun Heo | 75f9caf | 2008-01-03 01:21:14 +0900 | [diff] [blame] | 1773 | base = ATA_ECAT_DUBIOUS_NONE; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1774 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1775 | if (err_mask & AC_ERR_ATA_BUS) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1776 | return base + ATA_ECAT_ATA_BUS; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1777 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1778 | if (err_mask & AC_ERR_TIMEOUT) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1779 | return base + ATA_ECAT_TOUT_HSM; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1780 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1781 | if (eflags & ATA_EFLAG_IS_IO) { |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1782 | if (err_mask & AC_ERR_HSM) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1783 | return base + ATA_ECAT_TOUT_HSM; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1784 | if ((err_mask & |
| 1785 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1786 | return base + ATA_ECAT_UNK_DEV; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1787 | } |
| 1788 | |
| 1789 | return 0; |
| 1790 | } |
| 1791 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1792 | struct speed_down_verdict_arg { |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1793 | u64 since; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1794 | int xfer_ok; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1795 | int nr_errors[ATA_ECAT_NR]; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1796 | }; |
| 1797 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1798 | 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] | 1799 | { |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1800 | struct speed_down_verdict_arg *arg = void_arg; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1801 | int cat; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1802 | |
Gwendal Grignou | d902747 | 2010-05-25 12:31:38 -0700 | [diff] [blame] | 1803 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since)) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1804 | return -1; |
| 1805 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1806 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
| 1807 | &arg->xfer_ok); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1808 | arg->nr_errors[cat]++; |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1809 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1810 | return 0; |
| 1811 | } |
| 1812 | |
| 1813 | /** |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1814 | * ata_eh_speed_down_verdict - Determine speed down verdict |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1815 | * @dev: Device of interest |
| 1816 | * |
| 1817 | * This function examines error ring of @dev and determines |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1818 | * whether NCQ needs to be turned off, transfer speed should be |
| 1819 | * stepped down, or falling back to PIO is necessary. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1820 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1821 | * ECAT_ATA_BUS : ATA_BUS error for any command |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1822 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1823 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for |
| 1824 | * IO commands |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1825 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1826 | * ECAT_UNK_DEV : Unknown DEV error for IO commands |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1827 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1828 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
| 1829 | * data transfer hasn't been verified. |
| 1830 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1831 | * Verdicts are |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1832 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1833 | * NCQ_OFF : Turn off NCQ. |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1834 | * |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1835 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
| 1836 | * to PIO. |
| 1837 | * |
| 1838 | * FALLBACK_TO_PIO : Fall back to PIO. |
| 1839 | * |
| 1840 | * Even if multiple verdicts are returned, only one action is |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1841 | * taken per error. An action triggered by non-DUBIOUS errors |
| 1842 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. |
| 1843 | * This is to expedite speed down decisions right after device is |
| 1844 | * initially configured. |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1845 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1846 | * The followings are speed down rules. #1 and #2 deal with |
| 1847 | * DUBIOUS errors. |
| 1848 | * |
| 1849 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
| 1850 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. |
| 1851 | * |
| 1852 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors |
| 1853 | * occurred during last 5 mins, NCQ_OFF. |
| 1854 | * |
| 1855 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1856 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
| 1857 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1858 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1859 | * during last 10 mins, NCQ_OFF. |
| 1860 | * |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1861 | * 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] | 1862 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1863 | * |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1864 | * LOCKING: |
| 1865 | * Inherited from caller. |
| 1866 | * |
| 1867 | * RETURNS: |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1868 | * OR of ATA_EH_SPDN_* flags. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1869 | */ |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1870 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1871 | { |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1872 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
| 1873 | u64 j64 = get_jiffies_64(); |
| 1874 | struct speed_down_verdict_arg arg; |
| 1875 | unsigned int verdict = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1876 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1877 | /* scan past 5 mins of error history */ |
| 1878 | memset(&arg, 0, sizeof(arg)); |
| 1879 | arg.since = j64 - min(j64, j5mins); |
| 1880 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
| 1881 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1882 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
| 1883 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) |
| 1884 | verdict |= ATA_EH_SPDN_SPEED_DOWN | |
| 1885 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; |
| 1886 | |
| 1887 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + |
| 1888 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) |
| 1889 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; |
| 1890 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1891 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
| 1892 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 1893 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1894 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
| 1895 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1896 | /* scan past 10 mins of error history */ |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1897 | memset(&arg, 0, sizeof(arg)); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1898 | arg.since = j64 - min(j64, j10mins); |
| 1899 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1900 | |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1901 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
| 1902 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1903 | verdict |= ATA_EH_SPDN_NCQ_OFF; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1904 | |
| 1905 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
| 1906 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 1907 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1908 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
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 | return verdict; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1911 | } |
| 1912 | |
| 1913 | /** |
| 1914 | * ata_eh_speed_down - record error and speed down if necessary |
| 1915 | * @dev: Failed device |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1916 | * @eflags: mask of ATA_EFLAG_* flags |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1917 | * @err_mask: err_mask of the error |
| 1918 | * |
| 1919 | * Record error and examine error history to determine whether |
| 1920 | * adjusting transmission speed is necessary. It also sets |
| 1921 | * transmission limits appropriately if such adjustment is |
| 1922 | * necessary. |
| 1923 | * |
| 1924 | * LOCKING: |
| 1925 | * Kernel thread context (may sleep). |
| 1926 | * |
| 1927 | * RETURNS: |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1928 | * Determined recovery action. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1929 | */ |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1930 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
| 1931 | unsigned int eflags, unsigned int err_mask) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1932 | { |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 1933 | struct ata_link *link = ata_dev_phys_link(dev); |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1934 | int xfer_ok = 0; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1935 | unsigned int verdict; |
| 1936 | unsigned int action = 0; |
| 1937 | |
| 1938 | /* don't bother if Cat-0 error */ |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 1939 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1940 | return 0; |
| 1941 | |
| 1942 | /* record error and determine whether speed down is necessary */ |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 1943 | ata_ering_record(&dev->ering, eflags, err_mask); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1944 | verdict = ata_eh_speed_down_verdict(dev); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1945 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1946 | /* turn off NCQ? */ |
| 1947 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && |
| 1948 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | |
| 1949 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { |
| 1950 | dev->flags |= ATA_DFLAG_NCQ_OFF; |
| 1951 | ata_dev_printk(dev, KERN_WARNING, |
| 1952 | "NCQ disabled due to excessive errors\n"); |
| 1953 | goto done; |
| 1954 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1955 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1956 | /* speed down? */ |
| 1957 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { |
| 1958 | /* speed down SATA link speed if possible */ |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 1959 | if (sata_down_spd_limit(link, 0) == 0) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1960 | action |= ATA_EH_RESET; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1961 | goto done; |
| 1962 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1963 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1964 | /* lower transfer mode */ |
| 1965 | if (dev->spdn_cnt < 2) { |
| 1966 | static const int dma_dnxfer_sel[] = |
| 1967 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; |
| 1968 | static const int pio_dnxfer_sel[] = |
| 1969 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; |
| 1970 | int sel; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1971 | |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1972 | if (dev->xfer_shift != ATA_SHIFT_PIO) |
| 1973 | sel = dma_dnxfer_sel[dev->spdn_cnt]; |
| 1974 | else |
| 1975 | sel = pio_dnxfer_sel[dev->spdn_cnt]; |
| 1976 | |
| 1977 | dev->spdn_cnt++; |
| 1978 | |
| 1979 | if (ata_down_xfermask_limit(dev, sel) == 0) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1980 | action |= ATA_EH_RESET; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1981 | goto done; |
| 1982 | } |
| 1983 | } |
| 1984 | } |
| 1985 | |
| 1986 | /* Fall back to PIO? Slowing down to PIO is meaningless for |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 1987 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1988 | */ |
| 1989 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && |
Tejun Heo | 663f99b | 2007-11-27 19:28:57 +0900 | [diff] [blame] | 1990 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1991 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
| 1992 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { |
| 1993 | dev->spdn_cnt = 0; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 1994 | action |= ATA_EH_RESET; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 1995 | goto done; |
| 1996 | } |
| 1997 | } |
| 1998 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 1999 | return 0; |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2000 | done: |
| 2001 | /* device has been slowed down, blow error history */ |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 2002 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
| 2003 | ata_ering_clear(&dev->ering); |
Tejun Heo | 7d47e8d | 2007-02-02 16:22:31 +0900 | [diff] [blame] | 2004 | return action; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2005 | } |
| 2006 | |
| 2007 | /** |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2008 | * ata_eh_link_autopsy - analyze error and determine recovery action |
| 2009 | * @link: host link to perform autopsy on |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2010 | * |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2011 | * Analyze why @link failed and determine which recovery actions |
| 2012 | * are needed. This function also sets more detailed AC_ERR_* |
| 2013 | * values and fills sense data for ATAPI CHECK SENSE. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2014 | * |
| 2015 | * LOCKING: |
| 2016 | * Kernel thread context (may sleep). |
| 2017 | */ |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2018 | static void ata_eh_link_autopsy(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2019 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2020 | struct ata_port *ap = link->ap; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2021 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2022 | struct ata_device *dev; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2023 | unsigned int all_err_mask = 0, eflags = 0; |
| 2024 | int tag; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2025 | u32 serror; |
| 2026 | int rc; |
| 2027 | |
| 2028 | DPRINTK("ENTER\n"); |
| 2029 | |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 2030 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
| 2031 | return; |
| 2032 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2033 | /* obtain and analyze SError */ |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2034 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2035 | if (rc == 0) { |
| 2036 | ehc->i.serror |= serror; |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2037 | ata_eh_analyze_serror(link); |
Tejun Heo | 4e57c51 | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 2038 | } else if (rc != -EOPNOTSUPP) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2039 | /* SError read failed, force reset and probing */ |
Tejun Heo | b558edd | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2040 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2041 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 4e57c51 | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 2042 | ehc->i.err_mask |= AC_ERR_OTHER; |
| 2043 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2044 | |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 2045 | /* analyze NCQ failure */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2046 | ata_eh_analyze_ncq_error(link); |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 2047 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2048 | /* any real error trumps AC_ERR_OTHER */ |
| 2049 | if (ehc->i.err_mask & ~AC_ERR_OTHER) |
| 2050 | ehc->i.err_mask &= ~AC_ERR_OTHER; |
| 2051 | |
| 2052 | all_err_mask |= ehc->i.err_mask; |
| 2053 | |
| 2054 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 2055 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
| 2056 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2057 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
| 2058 | ata_dev_phys_link(qc->dev) != link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2059 | continue; |
| 2060 | |
| 2061 | /* inherit upper level err_mask */ |
| 2062 | qc->err_mask |= ehc->i.err_mask; |
| 2063 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2064 | /* analyze TF */ |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2065 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2066 | |
| 2067 | /* DEV errors are probably spurious in case of ATA_BUS error */ |
| 2068 | if (qc->err_mask & AC_ERR_ATA_BUS) |
| 2069 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | |
| 2070 | AC_ERR_INVALID); |
| 2071 | |
| 2072 | /* any real error trumps unknown error */ |
| 2073 | if (qc->err_mask & ~AC_ERR_OTHER) |
| 2074 | qc->err_mask &= ~AC_ERR_OTHER; |
| 2075 | |
| 2076 | /* SENSE_VALID trumps dev/unknown error and revalidation */ |
Tejun Heo | f90f082 | 2007-10-26 16:12:41 +0900 | [diff] [blame] | 2077 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2078 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2079 | |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 2080 | /* determine whether the command is worth retrying */ |
Tejun Heo | 534ead7 | 2010-01-14 16:18:09 +0900 | [diff] [blame] | 2081 | if (qc->flags & ATA_QCFLAG_IO || |
| 2082 | (!(qc->err_mask & AC_ERR_INVALID) && |
| 2083 | qc->err_mask != AC_ERR_DEV)) |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 2084 | qc->flags |= ATA_QCFLAG_RETRY; |
| 2085 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2086 | /* accumulate error info */ |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2087 | ehc->i.dev = qc->dev; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2088 | all_err_mask |= qc->err_mask; |
| 2089 | if (qc->flags & ATA_QCFLAG_IO) |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2090 | eflags |= ATA_EFLAG_IS_IO; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2091 | } |
| 2092 | |
Tejun Heo | a20f33f | 2006-05-16 12:58:24 +0900 | [diff] [blame] | 2093 | /* enforce default EH actions */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 2094 | if (ap->pflags & ATA_PFLAG_FROZEN || |
Tejun Heo | a20f33f | 2006-05-16 12:58:24 +0900 | [diff] [blame] | 2095 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2096 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2097 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
| 2098 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2099 | ehc->i.action |= ATA_EH_REVALIDATE; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2100 | |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2101 | /* If we have offending qcs and the associated failed device, |
| 2102 | * perform per-dev EH action only on the offending device. |
| 2103 | */ |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2104 | if (ehc->i.dev) { |
Tejun Heo | 4528e4d | 2006-07-08 20:17:26 +0900 | [diff] [blame] | 2105 | ehc->i.dev_action[ehc->i.dev->devno] |= |
| 2106 | ehc->i.action & ATA_EH_PERDEV_MASK; |
| 2107 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 2108 | } |
| 2109 | |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2110 | /* propagate timeout to host link */ |
| 2111 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) |
| 2112 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; |
| 2113 | |
| 2114 | /* record error and consider speeding down */ |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2115 | dev = ehc->i.dev; |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2116 | if (!dev && ((ata_link_max_devices(link) == 1 && |
| 2117 | ata_dev_enabled(link->device)))) |
| 2118 | dev = link->device; |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2119 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 2120 | if (dev) { |
| 2121 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) |
| 2122 | eflags |= ATA_EFLAG_DUBIOUS_XFER; |
Tejun Heo | 3884f7b | 2007-11-27 19:28:56 +0900 | [diff] [blame] | 2123 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 2124 | } |
Tejun Heo | dfcc173 | 2007-10-31 10:17:05 +0900 | [diff] [blame] | 2125 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2126 | DPRINTK("EXIT\n"); |
| 2127 | } |
| 2128 | |
| 2129 | /** |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2130 | * ata_eh_autopsy - analyze error and determine recovery action |
| 2131 | * @ap: host port to perform autopsy on |
| 2132 | * |
| 2133 | * Analyze all links of @ap and determine why they failed and |
| 2134 | * which recovery actions are needed. |
| 2135 | * |
| 2136 | * LOCKING: |
| 2137 | * Kernel thread context (may sleep). |
| 2138 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2139 | void ata_eh_autopsy(struct ata_port *ap) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2140 | { |
| 2141 | struct ata_link *link; |
| 2142 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2143 | ata_for_each_link(link, ap, EDGE) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2144 | ata_eh_link_autopsy(link); |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2145 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2146 | /* Handle the frigging slave link. Autopsy is done similarly |
| 2147 | * but actions and flags are transferred over to the master |
| 2148 | * link and handled from there. |
| 2149 | */ |
| 2150 | if (ap->slave_link) { |
| 2151 | struct ata_eh_context *mehc = &ap->link.eh_context; |
| 2152 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; |
| 2153 | |
Tejun Heo | 848e4c6 | 2008-10-21 14:26:39 +0900 | [diff] [blame] | 2154 | /* transfer control flags from master to slave */ |
| 2155 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; |
| 2156 | |
| 2157 | /* perform autopsy on the slave link */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2158 | ata_eh_link_autopsy(ap->slave_link); |
| 2159 | |
Tejun Heo | 848e4c6 | 2008-10-21 14:26:39 +0900 | [diff] [blame] | 2160 | /* transfer actions from slave to master and clear slave */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2161 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
| 2162 | mehc->i.action |= sehc->i.action; |
| 2163 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; |
| 2164 | mehc->i.flags |= sehc->i.flags; |
| 2165 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
| 2166 | } |
| 2167 | |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2168 | /* Autopsy of fanout ports can affect host link autopsy. |
| 2169 | * Perform host link autopsy last. |
| 2170 | */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 2171 | if (sata_pmp_attached(ap)) |
Tejun Heo | 2695e36 | 2008-01-10 13:41:23 +0900 | [diff] [blame] | 2172 | ata_eh_link_autopsy(&ap->link); |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2173 | } |
| 2174 | |
| 2175 | /** |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2176 | * ata_get_cmd_descript - get description for ATA command |
| 2177 | * @command: ATA command code to get description for |
| 2178 | * |
| 2179 | * Return a textual description of the given command, or NULL if the |
| 2180 | * command is not known. |
| 2181 | * |
| 2182 | * LOCKING: |
| 2183 | * None |
| 2184 | */ |
| 2185 | const char *ata_get_cmd_descript(u8 command) |
| 2186 | { |
| 2187 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
| 2188 | static const struct |
| 2189 | { |
| 2190 | u8 command; |
| 2191 | const char *text; |
| 2192 | } cmd_descr[] = { |
| 2193 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, |
| 2194 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, |
| 2195 | { ATA_CMD_STANDBY, "STANDBY" }, |
| 2196 | { ATA_CMD_IDLE, "IDLE" }, |
| 2197 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, |
| 2198 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, |
| 2199 | { ATA_CMD_NOP, "NOP" }, |
| 2200 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, |
| 2201 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, |
| 2202 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, |
| 2203 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, |
| 2204 | { ATA_CMD_SERVICE, "SERVICE" }, |
| 2205 | { ATA_CMD_READ, "READ DMA" }, |
| 2206 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, |
| 2207 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, |
| 2208 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, |
| 2209 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, |
| 2210 | { ATA_CMD_WRITE, "WRITE DMA" }, |
| 2211 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, |
| 2212 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, |
| 2213 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, |
| 2214 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, |
| 2215 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, |
| 2216 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, |
| 2217 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, |
| 2218 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, |
| 2219 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, |
| 2220 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, |
| 2221 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, |
| 2222 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, |
| 2223 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, |
| 2224 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, |
| 2225 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, |
| 2226 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, |
| 2227 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, |
| 2228 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, |
| 2229 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, |
| 2230 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, |
| 2231 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, |
| 2232 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, |
| 2233 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, |
| 2234 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, |
| 2235 | { ATA_CMD_SLEEP, "SLEEP" }, |
| 2236 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, |
| 2237 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, |
| 2238 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, |
| 2239 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, |
| 2240 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, |
| 2241 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, |
| 2242 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, |
| 2243 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, |
| 2244 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, |
| 2245 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, |
| 2246 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, |
| 2247 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, |
| 2248 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, |
| 2249 | { ATA_CMD_PMP_READ, "READ BUFFER" }, |
| 2250 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, |
| 2251 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, |
| 2252 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, |
| 2253 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, |
| 2254 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, |
| 2255 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, |
| 2256 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, |
| 2257 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, |
| 2258 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, |
| 2259 | { ATA_CMD_SMART, "SMART" }, |
| 2260 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, |
| 2261 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, |
FUJITA Tomonori | acad76272 | 2010-07-05 15:45:20 +0900 | [diff] [blame] | 2262 | { ATA_CMD_DSM, "DATA SET MANAGEMENT" }, |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2263 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, |
| 2264 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, |
| 2265 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, |
| 2266 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, |
| 2267 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, |
| 2268 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, |
| 2269 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, |
| 2270 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, |
| 2271 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, |
| 2272 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, |
| 2273 | { ATA_CMD_RESTORE, "RECALIBRATE" }, |
| 2274 | { 0, NULL } /* terminate list */ |
| 2275 | }; |
| 2276 | |
| 2277 | unsigned int i; |
| 2278 | for (i = 0; cmd_descr[i].text; i++) |
| 2279 | if (cmd_descr[i].command == command) |
| 2280 | return cmd_descr[i].text; |
| 2281 | #endif |
| 2282 | |
| 2283 | return NULL; |
| 2284 | } |
| 2285 | |
| 2286 | /** |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2287 | * ata_eh_link_report - report error handling to user |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2288 | * @link: ATA link EH is going on |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2289 | * |
| 2290 | * Report EH to user. |
| 2291 | * |
| 2292 | * LOCKING: |
| 2293 | * None. |
| 2294 | */ |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2295 | static void ata_eh_link_report(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2296 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2297 | struct ata_port *ap = link->ap; |
| 2298 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2299 | const char *frozen, *desc; |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2300 | char tries_buf[6]; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2301 | int tag, nr_failed = 0; |
| 2302 | |
Tejun Heo | 94ff3d5 | 2007-10-09 14:57:56 +0900 | [diff] [blame] | 2303 | if (ehc->i.flags & ATA_EHI_QUIET) |
| 2304 | return; |
| 2305 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2306 | desc = NULL; |
| 2307 | if (ehc->i.desc[0] != '\0') |
| 2308 | desc = ehc->i.desc; |
| 2309 | |
| 2310 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 2311 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
| 2312 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2313 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
| 2314 | ata_dev_phys_link(qc->dev) != link || |
Tejun Heo | e027bd3 | 2007-10-26 16:19:26 +0900 | [diff] [blame] | 2315 | ((qc->flags & ATA_QCFLAG_QUIET) && |
| 2316 | qc->err_mask == AC_ERR_DEV)) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2317 | continue; |
| 2318 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) |
| 2319 | continue; |
| 2320 | |
| 2321 | nr_failed++; |
| 2322 | } |
| 2323 | |
| 2324 | if (!nr_failed && !ehc->i.err_mask) |
| 2325 | return; |
| 2326 | |
| 2327 | frozen = ""; |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 2328 | if (ap->pflags & ATA_PFLAG_FROZEN) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2329 | frozen = " frozen"; |
| 2330 | |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2331 | memset(tries_buf, 0, sizeof(tries_buf)); |
| 2332 | if (ap->eh_tries < ATA_EH_MAX_TRIES) |
| 2333 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", |
| 2334 | ap->eh_tries); |
| 2335 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2336 | if (ehc->i.dev) { |
Tejun Heo | e8ee845 | 2006-05-15 21:03:46 +0900 | [diff] [blame] | 2337 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2338 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
| 2339 | ehc->i.err_mask, link->sactive, ehc->i.serror, |
| 2340 | ehc->i.action, frozen, tries_buf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2341 | if (desc) |
Tejun Heo | b64bbc3 | 2007-07-16 14:29:39 +0900 | [diff] [blame] | 2342 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2343 | } else { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2344 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
Tejun Heo | a1e10f7 | 2007-08-18 13:28:49 +0900 | [diff] [blame] | 2345 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
| 2346 | ehc->i.err_mask, link->sactive, ehc->i.serror, |
| 2347 | ehc->i.action, frozen, tries_buf); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2348 | if (desc) |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2349 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2350 | } |
| 2351 | |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2352 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2353 | if (ehc->i.serror) |
Tejun Heo | da0e21d | 2008-07-31 16:08:38 +0900 | [diff] [blame] | 2354 | ata_link_printk(link, KERN_ERR, |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2355 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
| 2356 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", |
| 2357 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", |
| 2358 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", |
| 2359 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", |
| 2360 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", |
| 2361 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", |
| 2362 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", |
| 2363 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", |
| 2364 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", |
| 2365 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", |
| 2366 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", |
| 2367 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", |
| 2368 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", |
| 2369 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", |
| 2370 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", |
| 2371 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2372 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2373 | #endif |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2374 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2375 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 2376 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2377 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2378 | const u8 *cdb = qc->cdb; |
| 2379 | char data_buf[20] = ""; |
| 2380 | char cdb_buf[70] = ""; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2381 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2382 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2383 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2384 | continue; |
| 2385 | |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2386 | if (qc->dma_dir != DMA_NONE) { |
| 2387 | static const char *dma_str[] = { |
| 2388 | [DMA_BIDIRECTIONAL] = "bidi", |
| 2389 | [DMA_TO_DEVICE] = "out", |
| 2390 | [DMA_FROM_DEVICE] = "in", |
| 2391 | }; |
| 2392 | static const char *prot_str[] = { |
| 2393 | [ATA_PROT_PIO] = "pio", |
| 2394 | [ATA_PROT_DMA] = "dma", |
| 2395 | [ATA_PROT_NCQ] = "ncq", |
Tejun Heo | 0dc3688 | 2007-12-18 16:34:43 -0500 | [diff] [blame] | 2396 | [ATAPI_PROT_PIO] = "pio", |
| 2397 | [ATAPI_PROT_DMA] = "dma", |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2398 | }; |
| 2399 | |
| 2400 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", |
| 2401 | prot_str[qc->tf.protocol], qc->nbytes, |
| 2402 | dma_str[qc->dma_dir]); |
| 2403 | } |
| 2404 | |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2405 | if (ata_is_atapi(qc->tf.protocol)) { |
| 2406 | if (qc->scsicmd) |
| 2407 | scsi_print_command(qc->scsicmd); |
| 2408 | else |
| 2409 | snprintf(cdb_buf, sizeof(cdb_buf), |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2410 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " |
| 2411 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", |
| 2412 | cdb[0], cdb[1], cdb[2], cdb[3], |
| 2413 | cdb[4], cdb[5], cdb[6], cdb[7], |
| 2414 | cdb[8], cdb[9], cdb[10], cdb[11], |
| 2415 | cdb[12], cdb[13], cdb[14], cdb[15]); |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2416 | } else { |
| 2417 | const char *descr = ata_get_cmd_descript(cmd->command); |
| 2418 | if (descr) |
| 2419 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2420 | "failed command: %s\n", descr); |
| 2421 | } |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2422 | |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2423 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2424 | "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] | 2425 | "tag %d%s\n %s" |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2426 | "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] | 2427 | "Emask 0x%x (%s)%s\n", |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2428 | cmd->command, cmd->feature, cmd->nsect, |
| 2429 | cmd->lbal, cmd->lbam, cmd->lbah, |
| 2430 | cmd->hob_feature, cmd->hob_nsect, |
| 2431 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, |
Tejun Heo | abb6a88 | 2007-11-28 23:16:09 +0900 | [diff] [blame] | 2432 | cmd->device, qc->tag, data_buf, cdb_buf, |
Tejun Heo | 8a93758 | 2006-11-14 22:36:12 +0900 | [diff] [blame] | 2433 | res->command, res->feature, res->nsect, |
| 2434 | res->lbal, res->lbam, res->lbah, |
| 2435 | res->hob_feature, res->hob_nsect, |
| 2436 | res->hob_lbal, res->hob_lbam, res->hob_lbah, |
Tejun Heo | 5335b72 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2437 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
| 2438 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2439 | |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2440 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2441 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2442 | ATA_ERR)) { |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2443 | if (res->command & ATA_BUSY) |
| 2444 | ata_dev_printk(qc->dev, KERN_ERR, |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2445 | "status: { Busy }\n"); |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2446 | else |
| 2447 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2448 | "status: { %s%s%s%s}\n", |
| 2449 | res->command & ATA_DRDY ? "DRDY " : "", |
| 2450 | res->command & ATA_DF ? "DF " : "", |
| 2451 | res->command & ATA_DRQ ? "DRQ " : "", |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2452 | res->command & ATA_ERR ? "ERR " : ""); |
Robert Hancock | 1333e19 | 2007-10-02 11:22:02 -0400 | [diff] [blame] | 2453 | } |
| 2454 | |
| 2455 | if (cmd->command != ATA_CMD_PACKET && |
| 2456 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | |
| 2457 | ATA_ABORTED))) |
| 2458 | ata_dev_printk(qc->dev, KERN_ERR, |
| 2459 | "error: { %s%s%s%s}\n", |
| 2460 | res->feature & ATA_ICRC ? "ICRC " : "", |
| 2461 | res->feature & ATA_UNC ? "UNC " : "", |
| 2462 | res->feature & ATA_IDNF ? "IDNF " : "", |
Jeff Garzik | 2dcb407 | 2007-10-19 06:42:56 -0400 | [diff] [blame] | 2463 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
Robert Hancock | 6521148 | 2009-07-14 20:43:39 -0600 | [diff] [blame] | 2464 | #endif |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2465 | } |
| 2466 | } |
| 2467 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2468 | /** |
| 2469 | * ata_eh_report - report error handling to user |
| 2470 | * @ap: ATA port to report EH about |
| 2471 | * |
| 2472 | * Report EH to user. |
| 2473 | * |
| 2474 | * LOCKING: |
| 2475 | * None. |
| 2476 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2477 | void ata_eh_report(struct ata_port *ap) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2478 | { |
| 2479 | struct ata_link *link; |
| 2480 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2481 | ata_for_each_link(link, ap, HOST_FIRST) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 2482 | ata_eh_link_report(link); |
| 2483 | } |
| 2484 | |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2485 | 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] | 2486 | unsigned int *classes, unsigned long deadline, |
| 2487 | bool clear_classes) |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2488 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2489 | struct ata_device *dev; |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2490 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2491 | if (clear_classes) |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2492 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2493 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2494 | |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2495 | return reset(link, classes, deadline); |
Tejun Heo | d87fa38 | 2006-05-31 18:28:24 +0900 | [diff] [blame] | 2496 | } |
| 2497 | |
Tejun Heo | ae791c0 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2498 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2499 | int rc, const unsigned int *classes) |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2500 | { |
Tejun Heo | 45db2f6 | 2008-04-08 01:46:56 +0900 | [diff] [blame] | 2501 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
Tejun Heo | ae791c0 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2502 | return 0; |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2503 | if (rc == -EAGAIN) |
| 2504 | return 1; |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 2505 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
Tejun Heo | 3495de7 | 2007-09-23 13:19:53 +0900 | [diff] [blame] | 2506 | return 1; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2507 | return 0; |
| 2508 | } |
| 2509 | |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2510 | int ata_eh_reset(struct ata_link *link, int classify, |
| 2511 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, |
| 2512 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2513 | { |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2514 | struct ata_port *ap = link->ap; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2515 | struct ata_link *slave = ap->slave_link; |
Tejun Heo | 936fd73 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2516 | struct ata_eh_context *ehc = &link->eh_context; |
Bartlomiej Zolnierkiewicz | 705d201 | 2009-07-26 16:21:01 +0200 | [diff] [blame] | 2517 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2518 | unsigned int *classes = ehc->classes; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2519 | unsigned int lflags = link->flags; |
Tejun Heo | 1cdaf53 | 2006-07-03 16:07:26 +0900 | [diff] [blame] | 2520 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 2521 | int max_tries = 0, try = 0; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2522 | struct ata_link *failed_link; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2523 | struct ata_device *dev; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2524 | unsigned long deadline, now; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2525 | ata_reset_fn_t reset; |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2526 | unsigned long flags; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2527 | u32 sstatus; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2528 | int nr_unknown, rc; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2529 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2530 | /* |
| 2531 | * Prepare to reset |
| 2532 | */ |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 2533 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
| 2534 | max_tries++; |
Tejun Heo | 05944bd | 2008-08-13 20:19:09 +0900 | [diff] [blame] | 2535 | if (link->flags & ATA_LFLAG_NO_HRST) |
| 2536 | hardreset = NULL; |
| 2537 | if (link->flags & ATA_LFLAG_NO_SRST) |
| 2538 | softreset = NULL; |
Tejun Heo | d8af0eb | 2008-05-20 02:17:53 +0900 | [diff] [blame] | 2539 | |
Tejun Heo | 19b7232 | 2008-11-04 17:08:40 +0900 | [diff] [blame] | 2540 | /* make sure each reset attemp is at least COOL_DOWN apart */ |
| 2541 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
| 2542 | now = jiffies; |
| 2543 | WARN_ON(time_after(ehc->last_reset, now)); |
| 2544 | deadline = ata_deadline(ehc->last_reset, |
| 2545 | ATA_EH_RESET_COOL_DOWN); |
| 2546 | if (time_before(now, deadline)) |
| 2547 | schedule_timeout_uninterruptible(deadline - now); |
| 2548 | } |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 2549 | |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2550 | spin_lock_irqsave(ap->lock, flags); |
| 2551 | ap->pflags |= ATA_PFLAG_RESETTING; |
| 2552 | spin_unlock_irqrestore(ap->lock, flags); |
| 2553 | |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2554 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
Tejun Heo | 13abf50 | 2006-07-10 23:18:46 +0900 | [diff] [blame] | 2555 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2556 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | cdeab11 | 2007-10-29 16:41:09 +0900 | [diff] [blame] | 2557 | /* If we issue an SRST then an ATA drive (not ATAPI) |
| 2558 | * may change configuration and be in PIO0 timing. If |
| 2559 | * we do a hard reset (or are coming from power on) |
| 2560 | * this is true for ATA or ATAPI. Until we've set a |
| 2561 | * suitable controller mode we should not touch the |
| 2562 | * bus as we may be talking too fast. |
| 2563 | */ |
| 2564 | dev->pio_mode = XFER_PIO_0; |
| 2565 | |
| 2566 | /* If the controller has a pio mode setup function |
| 2567 | * then use it to set the chipset to rights. Don't |
| 2568 | * touch the DMA setup as that will be dealt with when |
| 2569 | * configuring devices. |
| 2570 | */ |
| 2571 | if (ap->ops->set_piomode) |
| 2572 | ap->ops->set_piomode(ap, dev); |
| 2573 | } |
| 2574 | |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2575 | /* prefer hardreset */ |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2576 | reset = NULL; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2577 | ehc->i.action &= ~ATA_EH_RESET; |
| 2578 | if (hardreset) { |
| 2579 | reset = hardreset; |
Tejun Heo | a674050 | 2008-07-31 16:07:04 +0900 | [diff] [blame] | 2580 | ehc->i.action |= ATA_EH_HARDRESET; |
Tejun Heo | 4f7faa3 | 2008-01-30 18:18:26 +0900 | [diff] [blame] | 2581 | } else if (softreset) { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2582 | reset = softreset; |
Tejun Heo | a674050 | 2008-07-31 16:07:04 +0900 | [diff] [blame] | 2583 | ehc->i.action |= ATA_EH_SOFTRESET; |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2584 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2585 | |
| 2586 | if (prereset) { |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2587 | unsigned long deadline = ata_deadline(jiffies, |
| 2588 | ATA_EH_PRERESET_TIMEOUT); |
| 2589 | |
| 2590 | if (slave) { |
| 2591 | sehc->i.action &= ~ATA_EH_RESET; |
| 2592 | sehc->i.action |= ehc->i.action; |
| 2593 | } |
| 2594 | |
| 2595 | rc = prereset(link, deadline); |
| 2596 | |
| 2597 | /* If present, do prereset on slave link too. Reset |
| 2598 | * is skipped iff both master and slave links report |
| 2599 | * -ENOENT or clear ATA_EH_RESET. |
| 2600 | */ |
| 2601 | if (slave && (rc == 0 || rc == -ENOENT)) { |
| 2602 | int tmp; |
| 2603 | |
| 2604 | tmp = prereset(slave, deadline); |
| 2605 | if (tmp != -ENOENT) |
| 2606 | rc = tmp; |
| 2607 | |
| 2608 | ehc->i.action |= sehc->i.action; |
| 2609 | } |
| 2610 | |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2611 | if (rc) { |
Alan Cox | c961922 | 2006-09-26 17:53:38 +0100 | [diff] [blame] | 2612 | if (rc == -ENOENT) { |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2613 | ata_link_printk(link, KERN_DEBUG, |
Tejun Heo | 4aa9ab6 | 2007-03-12 17:24:08 +0900 | [diff] [blame] | 2614 | "port disabled. ignoring.\n"); |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2615 | ehc->i.action &= ~ATA_EH_RESET; |
Tejun Heo | 4aa9ab6 | 2007-03-12 17:24:08 +0900 | [diff] [blame] | 2616 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2617 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2618 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | 4aa9ab6 | 2007-03-12 17:24:08 +0900 | [diff] [blame] | 2619 | |
| 2620 | rc = 0; |
Alan Cox | c961922 | 2006-09-26 17:53:38 +0100 | [diff] [blame] | 2621 | } else |
Tejun Heo | cc0680a | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2622 | ata_link_printk(link, KERN_ERR, |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2623 | "prereset failed (errno=%d)\n", rc); |
Tejun Heo | fccb6ea | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 2624 | goto out; |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2625 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2626 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2627 | /* prereset() might have cleared ATA_EH_RESET. If so, |
Tejun Heo | d6515e6 | 2009-03-04 15:59:30 +0900 | [diff] [blame] | 2628 | * bang classes, thaw and return. |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2629 | */ |
| 2630 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2631 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2632 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | d6515e6 | 2009-03-04 15:59:30 +0900 | [diff] [blame] | 2633 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
| 2634 | ata_is_host_link(link)) |
| 2635 | ata_eh_thaw_port(ap); |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2636 | rc = 0; |
| 2637 | goto out; |
| 2638 | } |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 2639 | } |
| 2640 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2641 | retry: |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2642 | /* |
| 2643 | * Perform reset |
| 2644 | */ |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 2645 | if (ata_is_host_link(link)) |
| 2646 | ata_eh_freeze_port(ap); |
| 2647 | |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 2648 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
Tejun Heo | 31daabd | 2007-02-02 16:50:52 +0900 | [diff] [blame] | 2649 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2650 | if (reset) { |
| 2651 | if (verbose) |
| 2652 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", |
| 2653 | reset == softreset ? "soft" : "hard"); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2654 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2655 | /* mark that this EH session started with reset */ |
Tejun Heo | 19b7232 | 2008-11-04 17:08:40 +0900 | [diff] [blame] | 2656 | ehc->last_reset = jiffies; |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2657 | if (reset == hardreset) |
| 2658 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; |
| 2659 | else |
| 2660 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2661 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2662 | rc = ata_do_reset(link, reset, classes, deadline, true); |
| 2663 | if (rc && rc != -EAGAIN) { |
| 2664 | failed_link = link; |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2665 | goto fail; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2666 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2667 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2668 | /* hardreset slave link if existent */ |
| 2669 | if (slave && reset == hardreset) { |
| 2670 | int tmp; |
| 2671 | |
| 2672 | if (verbose) |
| 2673 | ata_link_printk(slave, KERN_INFO, |
| 2674 | "hard resetting link\n"); |
| 2675 | |
| 2676 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); |
| 2677 | tmp = ata_do_reset(slave, reset, classes, deadline, |
| 2678 | false); |
| 2679 | switch (tmp) { |
| 2680 | case -EAGAIN: |
| 2681 | rc = -EAGAIN; |
| 2682 | case 0: |
| 2683 | break; |
| 2684 | default: |
| 2685 | failed_link = slave; |
| 2686 | rc = tmp; |
| 2687 | goto fail; |
| 2688 | } |
| 2689 | } |
| 2690 | |
| 2691 | /* perform follow-up SRST if necessary */ |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2692 | if (reset == hardreset && |
Tejun Heo | 5dbfc9c | 2008-07-31 16:08:02 +0900 | [diff] [blame] | 2693 | ata_eh_followup_srst_needed(link, rc, classes)) { |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2694 | reset = softreset; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2695 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2696 | if (!reset) { |
| 2697 | ata_link_printk(link, KERN_ERR, |
| 2698 | "follow-up softreset required " |
| 2699 | "but no softreset avaliable\n"); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2700 | failed_link = link; |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2701 | rc = -EINVAL; |
| 2702 | goto fail; |
| 2703 | } |
| 2704 | |
| 2705 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2706 | rc = ata_do_reset(link, reset, classes, deadline, true); |
Tejun Heo | fe2c4d0 | 2009-07-08 12:16:37 +0900 | [diff] [blame] | 2707 | if (rc) { |
| 2708 | failed_link = link; |
| 2709 | goto fail; |
| 2710 | } |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2711 | } |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2712 | } else { |
| 2713 | if (verbose) |
| 2714 | ata_link_printk(link, KERN_INFO, "no reset method " |
| 2715 | "available, skipping reset\n"); |
| 2716 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) |
| 2717 | lflags |= ATA_LFLAG_ASSUME_ATA; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2718 | } |
| 2719 | |
Tejun Heo | 932648b | 2008-05-19 01:15:06 +0900 | [diff] [blame] | 2720 | /* |
| 2721 | * Post-reset processing |
| 2722 | */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2723 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2724 | /* After the reset, the device state is PIO 0 and the |
| 2725 | * controller state is undefined. Reset also wakes up |
| 2726 | * drives from sleeping mode. |
| 2727 | */ |
| 2728 | dev->pio_mode = XFER_PIO_0; |
| 2729 | dev->flags &= ~ATA_DFLAG_SLEEPING; |
Tejun Heo | 664faf0 | 2006-05-31 18:27:50 +0900 | [diff] [blame] | 2730 | |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2731 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
| 2732 | continue; |
| 2733 | |
| 2734 | /* apply class override */ |
| 2735 | if (lflags & ATA_LFLAG_ASSUME_ATA) |
| 2736 | classes[dev->devno] = ATA_DEV_ATA; |
| 2737 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) |
| 2738 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2739 | } |
| 2740 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2741 | /* record current link speed */ |
| 2742 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) |
| 2743 | link->sata_spd = (sstatus >> 4) & 0xf; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2744 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
| 2745 | slave->sata_spd = (sstatus >> 4) & 0xf; |
Tejun Heo | 008a789 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 2746 | |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 2747 | /* thaw the port */ |
| 2748 | if (ata_is_host_link(link)) |
| 2749 | ata_eh_thaw_port(ap); |
| 2750 | |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2751 | /* postreset() should clear hardware SError. Although SError |
| 2752 | * is cleared during link resume, clearing SError here is |
| 2753 | * necessary as some PHYs raise hotplug events after SRST. |
| 2754 | * This introduces race condition where hotplug occurs between |
| 2755 | * reset and here. This race is mediated by cross checking |
| 2756 | * link onlineness and classification result later. |
| 2757 | */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2758 | if (postreset) { |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2759 | postreset(link, classes); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2760 | if (slave) |
| 2761 | postreset(slave, classes); |
| 2762 | } |
Tejun Heo | 20952b6 | 2006-05-31 18:27:23 +0900 | [diff] [blame] | 2763 | |
Tejun Heo | 1e64106 | 2009-07-17 11:58:33 +0900 | [diff] [blame] | 2764 | /* |
| 2765 | * Some controllers can't be frozen very well and may set |
| 2766 | * spuruious error conditions during reset. Clear accumulated |
| 2767 | * error information. As reset is the final recovery action, |
| 2768 | * nothing is lost by doing this. |
| 2769 | */ |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2770 | spin_lock_irqsave(link->ap->lock, flags); |
Tejun Heo | 1e64106 | 2009-07-17 11:58:33 +0900 | [diff] [blame] | 2771 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2772 | if (slave) |
Tejun Heo | 1e64106 | 2009-07-17 11:58:33 +0900 | [diff] [blame] | 2773 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
| 2774 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2775 | spin_unlock_irqrestore(link->ap->lock, flags); |
| 2776 | |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2777 | /* |
| 2778 | * Make sure onlineness and classification result correspond. |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2779 | * Hotplug could have happened during reset and some |
| 2780 | * controllers fail to wait while a drive is spinning up after |
| 2781 | * being hotplugged causing misdetection. By cross checking |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2782 | * link on/offlineness and classification result, those |
| 2783 | * conditions can be reliably detected and retried. |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2784 | */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2785 | nr_unknown = 0; |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2786 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2787 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
| 2788 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { |
| 2789 | ata_dev_printk(dev, KERN_DEBUG, "link online " |
| 2790 | "but device misclassifed\n"); |
| 2791 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2792 | nr_unknown++; |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2793 | } |
| 2794 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
| 2795 | if (ata_class_enabled(classes[dev->devno])) |
| 2796 | ata_dev_printk(dev, KERN_DEBUG, "link offline, " |
| 2797 | "clearing class %d to NONE\n", |
| 2798 | classes[dev->devno]); |
| 2799 | classes[dev->devno] = ATA_DEV_NONE; |
| 2800 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { |
| 2801 | ata_dev_printk(dev, KERN_DEBUG, "link status unknown, " |
| 2802 | "clearing UNKNOWN to NONE\n"); |
| 2803 | classes[dev->devno] = ATA_DEV_NONE; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2804 | } |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2805 | } |
| 2806 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2807 | if (classify && nr_unknown) { |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2808 | if (try < max_tries) { |
| 2809 | ata_link_printk(link, KERN_WARNING, "link online but " |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2810 | "%d devices misclassified, retrying\n", |
| 2811 | nr_unknown); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2812 | failed_link = link; |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2813 | rc = -EAGAIN; |
| 2814 | goto fail; |
| 2815 | } |
| 2816 | ata_link_printk(link, KERN_WARNING, |
Tejun Heo | 3b761d3 | 2009-10-06 17:08:40 +0900 | [diff] [blame] | 2817 | "link online but %d devices misclassified, " |
| 2818 | "device detection might fail\n", nr_unknown); |
Tejun Heo | f046519 | 2008-05-19 01:15:08 +0900 | [diff] [blame] | 2819 | } |
| 2820 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2821 | /* reset successful, schedule revalidation */ |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 2822 | ata_eh_done(link, NULL, ATA_EH_RESET); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2823 | if (slave) |
| 2824 | ata_eh_done(slave, NULL, ATA_EH_RESET); |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 2825 | ehc->last_reset = jiffies; /* update to completion time */ |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2826 | ehc->i.action |= ATA_EH_REVALIDATE; |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 2827 | link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */ |
Tejun Heo | ae791c0 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2828 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2829 | rc = 0; |
Tejun Heo | fccb6ea | 2007-07-16 14:29:41 +0900 | [diff] [blame] | 2830 | out: |
| 2831 | /* clear hotplug flag */ |
| 2832 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2833 | if (slave) |
| 2834 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; |
Tejun Heo | afaa5c3 | 2007-10-09 15:06:10 +0900 | [diff] [blame] | 2835 | |
| 2836 | spin_lock_irqsave(ap->lock, flags); |
| 2837 | ap->pflags &= ~ATA_PFLAG_RESETTING; |
| 2838 | spin_unlock_irqrestore(ap->lock, flags); |
| 2839 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2840 | return rc; |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2841 | |
| 2842 | fail: |
Tejun Heo | 5958e30 | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 2843 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
| 2844 | if (!ata_is_host_link(link) && |
| 2845 | sata_scr_read(link, SCR_STATUS, &sstatus)) |
| 2846 | rc = -ERESTART; |
| 2847 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2848 | if (rc == -ERESTART || try >= max_tries) |
| 2849 | goto out; |
| 2850 | |
| 2851 | now = jiffies; |
| 2852 | if (time_before(now, deadline)) { |
| 2853 | unsigned long delta = deadline - now; |
| 2854 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2855 | ata_link_printk(failed_link, KERN_WARNING, |
Tejun Heo | 0a2c0f5 | 2008-05-20 02:17:52 +0900 | [diff] [blame] | 2856 | "reset failed (errno=%d), retrying in %u secs\n", |
| 2857 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2858 | |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 2859 | ata_eh_release(ap); |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2860 | while (delta) |
| 2861 | delta = schedule_timeout_uninterruptible(delta); |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 2862 | ata_eh_acquire(ap); |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2863 | } |
| 2864 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2865 | if (try == max_tries - 1) { |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 2866 | sata_down_spd_limit(link, 0); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2867 | if (slave) |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 2868 | sata_down_spd_limit(slave, 0); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2869 | } else if (rc == -EPIPE) |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 2870 | sata_down_spd_limit(failed_link, 0); |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2871 | |
Tejun Heo | 416dc9e | 2007-10-31 10:17:03 +0900 | [diff] [blame] | 2872 | if (hardreset) |
| 2873 | reset = hardreset; |
| 2874 | goto retry; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2875 | } |
| 2876 | |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 2877 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
| 2878 | { |
| 2879 | struct ata_link *link; |
| 2880 | struct ata_device *dev; |
| 2881 | unsigned long flags; |
| 2882 | |
| 2883 | /* |
| 2884 | * This function can be thought of as an extended version of |
| 2885 | * ata_eh_about_to_do() specially crafted to accommodate the |
| 2886 | * requirements of ATA_EH_PARK handling. Since the EH thread |
| 2887 | * does not leave the do {} while () loop in ata_eh_recover as |
| 2888 | * long as the timeout for a park request to *one* device on |
| 2889 | * the port has not expired, and since we still want to pick |
| 2890 | * up park requests to other devices on the same port or |
| 2891 | * timeout updates for the same device, we have to pull |
| 2892 | * ATA_EH_PARK actions from eh_info into eh_context.i |
| 2893 | * ourselves at the beginning of each pass over the loop. |
| 2894 | * |
| 2895 | * Additionally, all write accesses to &ap->park_req_pending |
| 2896 | * through INIT_COMPLETION() (see below) or complete_all() |
| 2897 | * (see ata_scsi_park_store()) are protected by the host lock. |
| 2898 | * As a result we have that park_req_pending.done is zero on |
| 2899 | * exit from this function, i.e. when ATA_EH_PARK actions for |
| 2900 | * *all* devices on port ap have been pulled into the |
| 2901 | * respective eh_context structs. If, and only if, |
| 2902 | * park_req_pending.done is non-zero by the time we reach |
| 2903 | * wait_for_completion_timeout(), another ATA_EH_PARK action |
| 2904 | * has been scheduled for at least one of the devices on port |
| 2905 | * ap and we have to cycle over the do {} while () loop in |
| 2906 | * ata_eh_recover() again. |
| 2907 | */ |
| 2908 | |
| 2909 | spin_lock_irqsave(ap->lock, flags); |
| 2910 | INIT_COMPLETION(ap->park_req_pending); |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2911 | ata_for_each_link(link, ap, EDGE) { |
| 2912 | ata_for_each_dev(dev, link, ALL) { |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 2913 | struct ata_eh_info *ehi = &link->eh_info; |
| 2914 | |
| 2915 | link->eh_context.i.dev_action[dev->devno] |= |
| 2916 | ehi->dev_action[dev->devno] & ATA_EH_PARK; |
| 2917 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); |
| 2918 | } |
| 2919 | } |
| 2920 | spin_unlock_irqrestore(ap->lock, flags); |
| 2921 | } |
| 2922 | |
| 2923 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) |
| 2924 | { |
| 2925 | struct ata_eh_context *ehc = &dev->link->eh_context; |
| 2926 | struct ata_taskfile tf; |
| 2927 | unsigned int err_mask; |
| 2928 | |
| 2929 | ata_tf_init(dev, &tf); |
| 2930 | if (park) { |
| 2931 | ehc->unloaded_mask |= 1 << dev->devno; |
| 2932 | tf.command = ATA_CMD_IDLEIMMEDIATE; |
| 2933 | tf.feature = 0x44; |
| 2934 | tf.lbal = 0x4c; |
| 2935 | tf.lbam = 0x4e; |
| 2936 | tf.lbah = 0x55; |
| 2937 | } else { |
| 2938 | ehc->unloaded_mask &= ~(1 << dev->devno); |
| 2939 | tf.command = ATA_CMD_CHK_POWER; |
| 2940 | } |
| 2941 | |
| 2942 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
| 2943 | tf.protocol |= ATA_PROT_NODATA; |
| 2944 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| 2945 | if (park && (err_mask || tf.lbal != 0xc4)) { |
| 2946 | ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); |
| 2947 | ehc->unloaded_mask &= ~(1 << dev->devno); |
| 2948 | } |
| 2949 | } |
| 2950 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2951 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2952 | struct ata_device **r_failed_dev) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2953 | { |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2954 | struct ata_port *ap = link->ap; |
| 2955 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2956 | struct ata_device *dev; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2957 | unsigned int new_mask = 0; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2958 | unsigned long flags; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2959 | int rc = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2960 | |
| 2961 | DPRINTK("ENTER\n"); |
| 2962 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2963 | /* For PATA drive side cable detection to work, IDENTIFY must |
| 2964 | * be done backwards such that PDIAG- is released by the slave |
| 2965 | * device before the master device is identified. |
| 2966 | */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 2967 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2968 | unsigned int action = ata_eh_dev_action(dev); |
| 2969 | unsigned int readid_flags = 0; |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 2970 | |
Tejun Heo | bff0464 | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 2971 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
| 2972 | readid_flags |= ATA_READID_POSTRESET; |
| 2973 | |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 2974 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
Tejun Heo | 633273a | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 2975 | WARN_ON(dev->class == ATA_DEV_PMP); |
| 2976 | |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 2977 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2978 | rc = -EIO; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2979 | goto err; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2980 | } |
| 2981 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2982 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
Tejun Heo | 422c9da | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 2983 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
| 2984 | readid_flags); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2985 | if (rc) |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 2986 | goto err; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 2987 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 2988 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
Tejun Heo | 47005f2 | 2006-06-19 18:27:23 +0900 | [diff] [blame] | 2989 | |
Tejun Heo | baa1e78 | 2006-11-01 18:39:27 +0900 | [diff] [blame] | 2990 | /* Configuration may have changed, reconfigure |
| 2991 | * transfer mode. |
| 2992 | */ |
| 2993 | ehc->i.flags |= ATA_EHI_SETMODE; |
| 2994 | |
zhao, forrest | 3057ac3 | 2006-06-12 12:01:34 +0800 | [diff] [blame] | 2995 | /* schedule the scsi_rescan_device() here */ |
Tejun Heo | ad72cf9 | 2010-07-02 10:03:52 +0200 | [diff] [blame] | 2996 | schedule_work(&(ap->scsi_rescan_task)); |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 2997 | } else if (dev->class == ATA_DEV_UNKNOWN && |
| 2998 | ehc->tries[dev->devno] && |
| 2999 | ata_class_enabled(ehc->classes[dev->devno])) { |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3000 | /* Temporarily set dev->class, it will be |
| 3001 | * permanently set once all configurations are |
| 3002 | * complete. This is necessary because new |
| 3003 | * device configuration is done in two |
| 3004 | * separate loops. |
| 3005 | */ |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3006 | dev->class = ehc->classes[dev->devno]; |
| 3007 | |
Tejun Heo | 633273a | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 3008 | if (dev->class == ATA_DEV_PMP) |
| 3009 | rc = sata_pmp_attach(dev); |
| 3010 | else |
| 3011 | rc = ata_dev_read_id(dev, &dev->class, |
| 3012 | readid_flags, dev->id); |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3013 | |
| 3014 | /* read_id might have changed class, store and reset */ |
| 3015 | ehc->classes[dev->devno] = dev->class; |
| 3016 | dev->class = ATA_DEV_UNKNOWN; |
| 3017 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3018 | switch (rc) { |
| 3019 | case 0: |
Tejun Heo | 99cf610 | 2009-01-29 20:31:32 +0900 | [diff] [blame] | 3020 | /* clear error info accumulated during probe */ |
| 3021 | ata_ering_clear(&dev->ering); |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3022 | new_mask |= 1 << dev->devno; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3023 | break; |
| 3024 | case -ENOENT: |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3025 | /* IDENTIFY was issued to non-existent |
| 3026 | * device. No need to reset. Just |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3027 | * thaw and ignore the device. |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3028 | */ |
| 3029 | ata_eh_thaw_port(ap); |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3030 | break; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3031 | default: |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3032 | goto err; |
Tejun Heo | 55a8e2c | 2006-11-10 18:08:10 +0900 | [diff] [blame] | 3033 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3034 | } |
| 3035 | } |
| 3036 | |
Tejun Heo | c1c4e8d | 2007-04-23 02:05:53 +0900 | [diff] [blame] | 3037 | /* PDIAG- should have been released, ask cable type if post-reset */ |
Tejun Heo | 3326732 | 2008-02-13 09:15:09 +0900 | [diff] [blame] | 3038 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
| 3039 | if (ap->ops->cable_detect) |
| 3040 | ap->cbl = ap->ops->cable_detect(ap); |
| 3041 | ata_force_cbl(ap); |
| 3042 | } |
Tejun Heo | c1c4e8d | 2007-04-23 02:05:53 +0900 | [diff] [blame] | 3043 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3044 | /* Configure new devices forward such that user doesn't see |
| 3045 | * device detection messages backwards. |
| 3046 | */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3047 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 4f7c287 | 2009-10-15 23:37:32 +0900 | [diff] [blame] | 3048 | if (!(new_mask & (1 << dev->devno))) |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3049 | continue; |
| 3050 | |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3051 | dev->class = ehc->classes[dev->devno]; |
| 3052 | |
Tejun Heo | 4f7c287 | 2009-10-15 23:37:32 +0900 | [diff] [blame] | 3053 | if (dev->class == ATA_DEV_PMP) |
| 3054 | continue; |
| 3055 | |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3056 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
| 3057 | rc = ata_dev_configure(dev); |
| 3058 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3059 | if (rc) { |
| 3060 | dev->class = ATA_DEV_UNKNOWN; |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3061 | goto err; |
Tejun Heo | 842faa6 | 2009-05-10 01:06:54 +0900 | [diff] [blame] | 3062 | } |
Tejun Heo | 8c3c52a | 2007-03-22 22:24:19 +0900 | [diff] [blame] | 3063 | |
| 3064 | spin_lock_irqsave(ap->lock, flags); |
| 3065 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
| 3066 | spin_unlock_irqrestore(ap->lock, flags); |
| 3067 | |
| 3068 | /* new device discovered, configure xfermode */ |
| 3069 | ehc->i.flags |= ATA_EHI_SETMODE; |
| 3070 | } |
| 3071 | |
| 3072 | return 0; |
| 3073 | |
| 3074 | err: |
| 3075 | *r_failed_dev = dev; |
| 3076 | DPRINTK("EXIT rc=%d\n", rc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3077 | return rc; |
| 3078 | } |
| 3079 | |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 3080 | /** |
| 3081 | * ata_set_mode - Program timings and issue SET FEATURES - XFER |
| 3082 | * @link: link on which timings will be programmed |
Martin Olsson | 98a1708 | 2009-04-22 18:21:29 +0200 | [diff] [blame] | 3083 | * @r_failed_dev: out parameter for failed device |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 3084 | * |
| 3085 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
| 3086 | * ata_set_mode() fails, pointer to the failing device is |
| 3087 | * returned in @r_failed_dev. |
| 3088 | * |
| 3089 | * LOCKING: |
| 3090 | * PCI/etc. bus probe sem. |
| 3091 | * |
| 3092 | * RETURNS: |
| 3093 | * 0 on success, negative errno otherwise |
| 3094 | */ |
| 3095 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
| 3096 | { |
| 3097 | struct ata_port *ap = link->ap; |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 3098 | struct ata_device *dev; |
| 3099 | int rc; |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 3100 | |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 3101 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3102 | ata_for_each_dev(dev, link, ENABLED) { |
Tejun Heo | 76326ac | 2007-11-27 19:28:59 +0900 | [diff] [blame] | 3103 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
| 3104 | struct ata_ering_entry *ent; |
| 3105 | |
| 3106 | ent = ata_ering_top(&dev->ering); |
| 3107 | if (ent) |
| 3108 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; |
| 3109 | } |
| 3110 | } |
| 3111 | |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 3112 | /* has private set_mode? */ |
| 3113 | if (ap->ops->set_mode) |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 3114 | rc = ap->ops->set_mode(link, r_failed_dev); |
| 3115 | else |
| 3116 | rc = ata_do_set_mode(link, r_failed_dev); |
| 3117 | |
| 3118 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3119 | ata_for_each_dev(dev, link, ENABLED) { |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 3120 | struct ata_eh_context *ehc = &link->eh_context; |
| 3121 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; |
| 3122 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); |
| 3123 | |
| 3124 | if (dev->xfer_mode != saved_xfer_mode || |
| 3125 | ata_ncq_enabled(dev) != saved_ncq) |
| 3126 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; |
| 3127 | } |
| 3128 | |
| 3129 | return rc; |
Tejun Heo | 6f1d1e3 | 2007-11-27 19:28:55 +0900 | [diff] [blame] | 3130 | } |
| 3131 | |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3132 | /** |
| 3133 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset |
| 3134 | * @dev: ATAPI device to clear UA for |
| 3135 | * |
| 3136 | * Resets and other operations can make an ATAPI device raise |
| 3137 | * UNIT ATTENTION which causes the next operation to fail. This |
| 3138 | * function clears UA. |
| 3139 | * |
| 3140 | * LOCKING: |
| 3141 | * EH context (may sleep). |
| 3142 | * |
| 3143 | * RETURNS: |
| 3144 | * 0 on success, -errno on failure. |
| 3145 | */ |
| 3146 | static int atapi_eh_clear_ua(struct ata_device *dev) |
| 3147 | { |
| 3148 | int i; |
| 3149 | |
| 3150 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { |
Tejun Heo | b535708 | 2009-03-02 18:55:16 +0900 | [diff] [blame] | 3151 | u8 *sense_buffer = dev->link->ap->sector_buf; |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3152 | u8 sense_key = 0; |
| 3153 | unsigned int err_mask; |
| 3154 | |
| 3155 | err_mask = atapi_eh_tur(dev, &sense_key); |
| 3156 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { |
| 3157 | ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " |
| 3158 | "failed (err_mask=0x%x)\n", err_mask); |
| 3159 | return -EIO; |
| 3160 | } |
| 3161 | |
| 3162 | if (!err_mask || sense_key != UNIT_ATTENTION) |
| 3163 | return 0; |
| 3164 | |
| 3165 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); |
| 3166 | if (err_mask) { |
| 3167 | ata_dev_printk(dev, KERN_WARNING, "failed to clear " |
| 3168 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); |
| 3169 | return -EIO; |
| 3170 | } |
| 3171 | } |
| 3172 | |
| 3173 | ata_dev_printk(dev, KERN_WARNING, |
| 3174 | "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); |
| 3175 | |
| 3176 | return 0; |
| 3177 | } |
| 3178 | |
Tejun Heo | 6013efd | 2009-11-19 15:36:45 +0900 | [diff] [blame] | 3179 | /** |
| 3180 | * ata_eh_maybe_retry_flush - Retry FLUSH if necessary |
| 3181 | * @dev: ATA device which may need FLUSH retry |
| 3182 | * |
| 3183 | * If @dev failed FLUSH, it needs to be reported upper layer |
| 3184 | * immediately as it means that @dev failed to remap and already |
| 3185 | * lost at least a sector and further FLUSH retrials won't make |
| 3186 | * any difference to the lost sector. However, if FLUSH failed |
| 3187 | * for other reasons, for example transmission error, FLUSH needs |
| 3188 | * to be retried. |
| 3189 | * |
| 3190 | * This function determines whether FLUSH failure retry is |
| 3191 | * necessary and performs it if so. |
| 3192 | * |
| 3193 | * RETURNS: |
| 3194 | * 0 if EH can continue, -errno if EH needs to be repeated. |
| 3195 | */ |
| 3196 | static int ata_eh_maybe_retry_flush(struct ata_device *dev) |
| 3197 | { |
| 3198 | struct ata_link *link = dev->link; |
| 3199 | struct ata_port *ap = link->ap; |
| 3200 | struct ata_queued_cmd *qc; |
| 3201 | struct ata_taskfile tf; |
| 3202 | unsigned int err_mask; |
| 3203 | int rc = 0; |
| 3204 | |
| 3205 | /* did flush fail for this device? */ |
| 3206 | if (!ata_tag_valid(link->active_tag)) |
| 3207 | return 0; |
| 3208 | |
| 3209 | qc = __ata_qc_from_tag(ap, link->active_tag); |
| 3210 | if (qc->dev != dev || (qc->tf.command != ATA_CMD_FLUSH_EXT && |
| 3211 | qc->tf.command != ATA_CMD_FLUSH)) |
| 3212 | return 0; |
| 3213 | |
| 3214 | /* if the device failed it, it should be reported to upper layers */ |
| 3215 | if (qc->err_mask & AC_ERR_DEV) |
| 3216 | return 0; |
| 3217 | |
| 3218 | /* flush failed for some other reason, give it another shot */ |
| 3219 | ata_tf_init(dev, &tf); |
| 3220 | |
| 3221 | tf.command = qc->tf.command; |
| 3222 | tf.flags |= ATA_TFLAG_DEVICE; |
| 3223 | tf.protocol = ATA_PROT_NODATA; |
| 3224 | |
| 3225 | ata_dev_printk(dev, KERN_WARNING, "retrying FLUSH 0x%x Emask 0x%x\n", |
| 3226 | tf.command, qc->err_mask); |
| 3227 | |
| 3228 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| 3229 | if (!err_mask) { |
| 3230 | /* |
| 3231 | * FLUSH is complete but there's no way to |
| 3232 | * successfully complete a failed command from EH. |
| 3233 | * Making sure retry is allowed at least once and |
| 3234 | * retrying it should do the trick - whatever was in |
| 3235 | * the cache is already on the platter and this won't |
| 3236 | * cause infinite loop. |
| 3237 | */ |
| 3238 | qc->scsicmd->allowed = max(qc->scsicmd->allowed, 1); |
| 3239 | } else { |
| 3240 | ata_dev_printk(dev, KERN_WARNING, "FLUSH failed Emask 0x%x\n", |
| 3241 | err_mask); |
| 3242 | rc = -EIO; |
| 3243 | |
| 3244 | /* if device failed it, report it to upper layers */ |
| 3245 | if (err_mask & AC_ERR_DEV) { |
| 3246 | qc->err_mask |= AC_ERR_DEV; |
| 3247 | qc->result_tf = tf; |
| 3248 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) |
| 3249 | rc = 0; |
| 3250 | } |
| 3251 | } |
| 3252 | return rc; |
| 3253 | } |
| 3254 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3255 | /** |
| 3256 | * ata_eh_set_lpm - configure SATA interface power management |
| 3257 | * @link: link to configure power management |
| 3258 | * @policy: the link power management policy |
| 3259 | * @r_failed_dev: out parameter for failed device |
| 3260 | * |
| 3261 | * Enable SATA Interface power management. This will enable |
| 3262 | * Device Interface Power Management (DIPM) for min_power |
| 3263 | * policy, and then call driver specific callbacks for |
| 3264 | * enabling Host Initiated Power management. |
| 3265 | * |
| 3266 | * LOCKING: |
| 3267 | * EH context. |
| 3268 | * |
| 3269 | * RETURNS: |
| 3270 | * 0 on success, -errno on failure. |
| 3271 | */ |
| 3272 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, |
| 3273 | struct ata_device **r_failed_dev) |
| 3274 | { |
Tejun Heo | 6c8ea89 | 2010-09-01 17:50:07 +0200 | [diff] [blame] | 3275 | struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL; |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3276 | struct ata_eh_context *ehc = &link->eh_context; |
| 3277 | struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; |
Tejun Heo | e5005b1 | 2010-12-09 16:13:15 +0100 | [diff] [blame] | 3278 | enum ata_lpm_policy old_policy = link->lpm_policy; |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3279 | unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; |
| 3280 | unsigned int err_mask; |
| 3281 | int rc; |
| 3282 | |
| 3283 | /* if the link or host doesn't do LPM, noop */ |
| 3284 | if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) |
| 3285 | return 0; |
| 3286 | |
| 3287 | /* |
| 3288 | * DIPM is enabled only for MIN_POWER as some devices |
| 3289 | * misbehave when the host NACKs transition to SLUMBER. Order |
| 3290 | * device and link configurations such that the host always |
| 3291 | * allows DIPM requests. |
| 3292 | */ |
| 3293 | ata_for_each_dev(dev, link, ENABLED) { |
| 3294 | bool hipm = ata_id_has_hipm(dev->id); |
| 3295 | bool dipm = ata_id_has_dipm(dev->id); |
| 3296 | |
| 3297 | /* find the first enabled and LPM enabled devices */ |
| 3298 | if (!link_dev) |
| 3299 | link_dev = dev; |
| 3300 | |
| 3301 | if (!lpm_dev && (hipm || dipm)) |
| 3302 | lpm_dev = dev; |
| 3303 | |
| 3304 | hints &= ~ATA_LPM_EMPTY; |
| 3305 | if (!hipm) |
| 3306 | hints &= ~ATA_LPM_HIPM; |
| 3307 | |
| 3308 | /* disable DIPM before changing link config */ |
| 3309 | if (policy != ATA_LPM_MIN_POWER && dipm) { |
| 3310 | err_mask = ata_dev_set_feature(dev, |
| 3311 | SETFEATURES_SATA_DISABLE, SATA_DIPM); |
| 3312 | if (err_mask && err_mask != AC_ERR_DEV) { |
| 3313 | ata_dev_printk(dev, KERN_WARNING, |
| 3314 | "failed to disable DIPM, Emask 0x%x\n", |
| 3315 | err_mask); |
| 3316 | rc = -EIO; |
| 3317 | goto fail; |
| 3318 | } |
| 3319 | } |
| 3320 | } |
| 3321 | |
Tejun Heo | 6c8ea89 | 2010-09-01 17:50:07 +0200 | [diff] [blame] | 3322 | if (ap) { |
| 3323 | rc = ap->ops->set_lpm(link, policy, hints); |
| 3324 | if (!rc && ap->slave_link) |
| 3325 | rc = ap->ops->set_lpm(ap->slave_link, policy, hints); |
| 3326 | } else |
| 3327 | rc = sata_pmp_set_lpm(link, policy, hints); |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3328 | |
| 3329 | /* |
| 3330 | * Attribute link config failure to the first (LPM) enabled |
| 3331 | * device on the link. |
| 3332 | */ |
| 3333 | if (rc) { |
| 3334 | if (rc == -EOPNOTSUPP) { |
| 3335 | link->flags |= ATA_LFLAG_NO_LPM; |
| 3336 | return 0; |
| 3337 | } |
| 3338 | dev = lpm_dev ? lpm_dev : link_dev; |
| 3339 | goto fail; |
| 3340 | } |
| 3341 | |
Tejun Heo | e5005b1 | 2010-12-09 16:13:15 +0100 | [diff] [blame] | 3342 | /* |
| 3343 | * Low level driver acked the transition. Issue DIPM command |
| 3344 | * with the new policy set. |
| 3345 | */ |
| 3346 | link->lpm_policy = policy; |
| 3347 | if (ap && ap->slave_link) |
| 3348 | ap->slave_link->lpm_policy = policy; |
| 3349 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3350 | /* host config updated, enable DIPM if transitioning to MIN_POWER */ |
| 3351 | ata_for_each_dev(dev, link, ENABLED) { |
| 3352 | if (policy == ATA_LPM_MIN_POWER && ata_id_has_dipm(dev->id)) { |
| 3353 | err_mask = ata_dev_set_feature(dev, |
| 3354 | SETFEATURES_SATA_ENABLE, SATA_DIPM); |
| 3355 | if (err_mask && err_mask != AC_ERR_DEV) { |
| 3356 | ata_dev_printk(dev, KERN_WARNING, |
| 3357 | "failed to enable DIPM, Emask 0x%x\n", |
| 3358 | err_mask); |
| 3359 | rc = -EIO; |
| 3360 | goto fail; |
| 3361 | } |
| 3362 | } |
| 3363 | } |
| 3364 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3365 | return 0; |
| 3366 | |
| 3367 | fail: |
Tejun Heo | e5005b1 | 2010-12-09 16:13:15 +0100 | [diff] [blame] | 3368 | /* restore the old policy */ |
| 3369 | link->lpm_policy = old_policy; |
| 3370 | if (ap && ap->slave_link) |
| 3371 | ap->slave_link->lpm_policy = old_policy; |
| 3372 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3373 | /* if no device or only one more chance is left, disable LPM */ |
| 3374 | if (!dev || ehc->tries[dev->devno] <= 2) { |
| 3375 | ata_link_printk(link, KERN_WARNING, |
| 3376 | "disabling LPM on the link\n"); |
| 3377 | link->flags |= ATA_LFLAG_NO_LPM; |
| 3378 | } |
| 3379 | if (r_failed_dev) |
| 3380 | *r_failed_dev = dev; |
| 3381 | return rc; |
| 3382 | } |
| 3383 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3384 | static int ata_link_nr_enabled(struct ata_link *link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3385 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3386 | struct ata_device *dev; |
| 3387 | int cnt = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3388 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3389 | ata_for_each_dev(dev, link, ENABLED) |
| 3390 | cnt++; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3391 | return cnt; |
| 3392 | } |
| 3393 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3394 | static int ata_link_nr_vacant(struct ata_link *link) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3395 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3396 | struct ata_device *dev; |
| 3397 | int cnt = 0; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3398 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3399 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3400 | if (dev->class == ATA_DEV_UNKNOWN) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3401 | cnt++; |
| 3402 | return cnt; |
| 3403 | } |
| 3404 | |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3405 | static int ata_eh_skip_recovery(struct ata_link *link) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3406 | { |
Tejun Heo | 672b2d6 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 3407 | struct ata_port *ap = link->ap; |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3408 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 3409 | struct ata_device *dev; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3410 | |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 3411 | /* skip disabled links */ |
| 3412 | if (link->flags & ATA_LFLAG_DISABLED) |
| 3413 | return 1; |
| 3414 | |
Tejun Heo | e2f3d75 | 2010-09-07 14:05:31 +0200 | [diff] [blame] | 3415 | /* skip if explicitly requested */ |
| 3416 | if (ehc->i.flags & ATA_EHI_NO_RECOVERY) |
| 3417 | return 1; |
| 3418 | |
Tejun Heo | 672b2d6 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 3419 | /* thaw frozen port and recover failed devices */ |
| 3420 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) |
| 3421 | return 0; |
| 3422 | |
| 3423 | /* reset at least once if reset is requested */ |
| 3424 | if ((ehc->i.action & ATA_EH_RESET) && |
| 3425 | !(ehc->i.flags & ATA_EHI_DID_RESET)) |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3426 | return 0; |
| 3427 | |
| 3428 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3429 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3430 | if (dev->class == ATA_DEV_UNKNOWN && |
| 3431 | ehc->classes[dev->devno] != ATA_DEV_NONE) |
| 3432 | return 0; |
| 3433 | } |
| 3434 | |
| 3435 | return 1; |
| 3436 | } |
| 3437 | |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 3438 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
| 3439 | { |
| 3440 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); |
| 3441 | u64 now = get_jiffies_64(); |
| 3442 | int *trials = void_arg; |
| 3443 | |
| 3444 | if (ent->timestamp < now - min(now, interval)) |
| 3445 | return -1; |
| 3446 | |
| 3447 | (*trials)++; |
| 3448 | return 0; |
| 3449 | } |
| 3450 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3451 | static int ata_eh_schedule_probe(struct ata_device *dev) |
| 3452 | { |
| 3453 | struct ata_eh_context *ehc = &dev->link->eh_context; |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 3454 | struct ata_link *link = ata_dev_phys_link(dev); |
| 3455 | int trials = 0; |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3456 | |
| 3457 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || |
| 3458 | (ehc->did_probe_mask & (1 << dev->devno))) |
| 3459 | return 0; |
| 3460 | |
| 3461 | ata_eh_detach_dev(dev); |
| 3462 | ata_dev_init(dev); |
| 3463 | ehc->did_probe_mask |= (1 << dev->devno); |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 3464 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 00115e0 | 2007-11-27 19:28:58 +0900 | [diff] [blame] | 3465 | ehc->saved_xfer_mode[dev->devno] = 0; |
| 3466 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3467 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3468 | /* the link maybe in a deep sleep, wake it up */ |
Tejun Heo | 6c8ea89 | 2010-09-01 17:50:07 +0200 | [diff] [blame] | 3469 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { |
| 3470 | if (ata_is_host_link(link)) |
| 3471 | link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER, |
| 3472 | ATA_LPM_EMPTY); |
| 3473 | else |
| 3474 | sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER, |
| 3475 | ATA_LPM_EMPTY); |
| 3476 | } |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3477 | |
Tejun Heo | c2c7a89 | 2009-01-29 20:31:34 +0900 | [diff] [blame] | 3478 | /* Record and count probe trials on the ering. The specific |
| 3479 | * error mask used is irrelevant. Because a successful device |
| 3480 | * detection clears the ering, this count accumulates only if |
| 3481 | * there are consecutive failed probes. |
| 3482 | * |
| 3483 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS |
| 3484 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is |
| 3485 | * forced to 1.5Gbps. |
| 3486 | * |
| 3487 | * This is to work around cases where failed link speed |
| 3488 | * negotiation results in device misdetection leading to |
| 3489 | * infinite DEVXCHG or PHRDY CHG events. |
| 3490 | */ |
| 3491 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); |
| 3492 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); |
| 3493 | |
| 3494 | if (trials > ATA_EH_PROBE_TRIALS) |
| 3495 | sata_down_spd_limit(link, 1); |
| 3496 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3497 | return 1; |
| 3498 | } |
| 3499 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3500 | 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] | 3501 | { |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 3502 | struct ata_eh_context *ehc = &dev->link->eh_context; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3503 | |
Tejun Heo | cf9a590 | 2009-01-29 20:31:35 +0900 | [diff] [blame] | 3504 | /* -EAGAIN from EH routine indicates retry without prejudice. |
| 3505 | * The requester is responsible for ensuring forward progress. |
| 3506 | */ |
| 3507 | if (err != -EAGAIN) |
| 3508 | ehc->tries[dev->devno]--; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3509 | |
| 3510 | switch (err) { |
| 3511 | case -ENODEV: |
| 3512 | /* device missing or wrong IDENTIFY data, schedule probing */ |
| 3513 | ehc->i.probe_mask |= (1 << dev->devno); |
| 3514 | case -EINVAL: |
| 3515 | /* give it just one more chance */ |
| 3516 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); |
| 3517 | case -EIO: |
Tejun Heo | d89293a | 2009-01-29 20:31:29 +0900 | [diff] [blame] | 3518 | if (ehc->tries[dev->devno] == 1) { |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3519 | /* This is the last chance, better to slow |
| 3520 | * down than lose it. |
| 3521 | */ |
Tejun Heo | a07d499 | 2009-01-29 20:31:33 +0900 | [diff] [blame] | 3522 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
Tejun Heo | d89293a | 2009-01-29 20:31:29 +0900 | [diff] [blame] | 3523 | if (dev->pio_mode > XFER_PIO_0) |
| 3524 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3525 | } |
| 3526 | } |
| 3527 | |
| 3528 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { |
| 3529 | /* disable device if it has used up all its chances */ |
| 3530 | ata_dev_disable(dev); |
| 3531 | |
| 3532 | /* detach if offline */ |
Tejun Heo | b1c7291 | 2008-07-31 17:02:43 +0900 | [diff] [blame] | 3533 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3534 | ata_eh_detach_dev(dev); |
| 3535 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3536 | /* schedule probe if necessary */ |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 3537 | if (ata_eh_schedule_probe(dev)) { |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3538 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
Tejun Heo | 87fbc5a | 2008-05-20 02:17:54 +0900 | [diff] [blame] | 3539 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
| 3540 | sizeof(ehc->cmd_timeout_idx[dev->devno])); |
| 3541 | } |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3542 | |
| 3543 | return 1; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3544 | } else { |
Tejun Heo | cf48062 | 2008-01-24 00:05:14 +0900 | [diff] [blame] | 3545 | ehc->i.action |= ATA_EH_RESET; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3546 | return 0; |
Tejun Heo | fee7ca7 | 2007-07-01 19:05:58 +0900 | [diff] [blame] | 3547 | } |
| 3548 | } |
| 3549 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3550 | /** |
| 3551 | * ata_eh_recover - recover host port after error |
| 3552 | * @ap: host port to recover |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3553 | * @prereset: prereset method (can be NULL) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3554 | * @softreset: softreset method (can be NULL) |
| 3555 | * @hardreset: hardreset method (can be NULL) |
| 3556 | * @postreset: postreset method (can be NULL) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3557 | * @r_failed_link: out parameter for failed link |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3558 | * |
| 3559 | * This is the alpha and omega, eum and yang, heart and soul of |
| 3560 | * libata exception handling. On entry, actions required to |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3561 | * recover each link and hotplug requests are recorded in the |
| 3562 | * link's eh_context. This function executes all the operations |
| 3563 | * with appropriate retrials and fallbacks to resurrect failed |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3564 | * devices, detach goners and greet newcomers. |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3565 | * |
| 3566 | * LOCKING: |
| 3567 | * Kernel thread context (may sleep). |
| 3568 | * |
| 3569 | * RETURNS: |
| 3570 | * 0 on success, -errno on failure. |
| 3571 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3572 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
| 3573 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
| 3574 | ata_postreset_fn_t postreset, |
| 3575 | struct ata_link **r_failed_link) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3576 | { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3577 | struct ata_link *link; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3578 | struct ata_device *dev; |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3579 | int rc, nr_fails; |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3580 | unsigned long flags, deadline; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3581 | |
| 3582 | DPRINTK("ENTER\n"); |
| 3583 | |
| 3584 | /* prep for recovery */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3585 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3586 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3587 | |
Tejun Heo | f9df58c | 2007-09-23 13:14:13 +0900 | [diff] [blame] | 3588 | /* re-enable link? */ |
| 3589 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { |
| 3590 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); |
| 3591 | spin_lock_irqsave(ap->lock, flags); |
| 3592 | link->flags &= ~ATA_LFLAG_DISABLED; |
| 3593 | spin_unlock_irqrestore(ap->lock, flags); |
| 3594 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); |
| 3595 | } |
| 3596 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3597 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | fd995f7 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3598 | if (link->flags & ATA_LFLAG_NO_RETRY) |
| 3599 | ehc->tries[dev->devno] = 1; |
| 3600 | else |
| 3601 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
Tejun Heo | 79a55b7 | 2007-01-18 17:22:18 +0900 | [diff] [blame] | 3602 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3603 | /* collect port action mask recorded in dev actions */ |
| 3604 | ehc->i.action |= ehc->i.dev_action[dev->devno] & |
| 3605 | ~ATA_EH_PERDEV_MASK; |
| 3606 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3607 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3608 | /* process hotplug request */ |
| 3609 | if (dev->flags & ATA_DFLAG_DETACH) |
| 3610 | ata_eh_detach_dev(dev); |
| 3611 | |
Tejun Heo | 02c05a2 | 2007-11-27 19:28:54 +0900 | [diff] [blame] | 3612 | /* schedule probe if necessary */ |
| 3613 | if (!ata_dev_enabled(dev)) |
| 3614 | ata_eh_schedule_probe(dev); |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3615 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3616 | } |
| 3617 | |
| 3618 | retry: |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3619 | rc = 0; |
| 3620 | |
Tejun Heo | aeb2ecd | 2006-06-12 14:11:43 +0900 | [diff] [blame] | 3621 | /* if UNLOADING, finish immediately */ |
Tejun Heo | b51e9e5 | 2006-06-29 01:29:30 +0900 | [diff] [blame] | 3622 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
Tejun Heo | aeb2ecd | 2006-06-12 14:11:43 +0900 | [diff] [blame] | 3623 | goto out; |
| 3624 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3625 | /* prep for EH */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3626 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3627 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3628 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3629 | /* skip EH if possible. */ |
| 3630 | if (ata_eh_skip_recovery(link)) |
| 3631 | ehc->i.action = 0; |
| 3632 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3633 | ata_for_each_dev(dev, link, ALL) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3634 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
| 3635 | } |
Tejun Heo | 084fe63 | 2006-05-31 18:28:03 +0900 | [diff] [blame] | 3636 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3637 | /* reset */ |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3638 | ata_for_each_link(link, ap, EDGE) { |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 3639 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3640 | |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 3641 | if (!(ehc->i.action & ATA_EH_RESET)) |
| 3642 | continue; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3643 | |
Tejun Heo | dc98c32 | 2008-05-19 01:15:07 +0900 | [diff] [blame] | 3644 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
| 3645 | prereset, softreset, hardreset, postreset); |
| 3646 | if (rc) { |
| 3647 | ata_link_printk(link, KERN_ERR, |
| 3648 | "reset failed, giving up\n"); |
| 3649 | goto out; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3650 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3651 | } |
| 3652 | |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3653 | do { |
| 3654 | unsigned long now; |
| 3655 | |
| 3656 | /* |
| 3657 | * clears ATA_EH_PARK in eh_info and resets |
| 3658 | * ap->park_req_pending |
| 3659 | */ |
| 3660 | ata_eh_pull_park_action(ap); |
| 3661 | |
| 3662 | deadline = jiffies; |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3663 | ata_for_each_link(link, ap, EDGE) { |
| 3664 | ata_for_each_dev(dev, link, ALL) { |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3665 | struct ata_eh_context *ehc = &link->eh_context; |
| 3666 | unsigned long tmp; |
| 3667 | |
| 3668 | if (dev->class != ATA_DEV_ATA) |
| 3669 | continue; |
| 3670 | if (!(ehc->i.dev_action[dev->devno] & |
| 3671 | ATA_EH_PARK)) |
| 3672 | continue; |
| 3673 | tmp = dev->unpark_deadline; |
| 3674 | if (time_before(deadline, tmp)) |
| 3675 | deadline = tmp; |
| 3676 | else if (time_before_eq(tmp, jiffies)) |
| 3677 | continue; |
| 3678 | if (ehc->unloaded_mask & (1 << dev->devno)) |
| 3679 | continue; |
| 3680 | |
| 3681 | ata_eh_park_issue_cmd(dev, 1); |
| 3682 | } |
| 3683 | } |
| 3684 | |
| 3685 | now = jiffies; |
| 3686 | if (time_before_eq(deadline, now)) |
| 3687 | break; |
| 3688 | |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 3689 | ata_eh_release(ap); |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3690 | deadline = wait_for_completion_timeout(&ap->park_req_pending, |
| 3691 | deadline - now); |
Tejun Heo | c0c362b | 2010-09-06 17:57:14 +0200 | [diff] [blame] | 3692 | ata_eh_acquire(ap); |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3693 | } while (deadline); |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3694 | ata_for_each_link(link, ap, EDGE) { |
| 3695 | ata_for_each_dev(dev, link, ALL) { |
Elias Oltmanns | 45fabbb | 2008-09-21 11:54:08 +0200 | [diff] [blame] | 3696 | if (!(link->eh_context.unloaded_mask & |
| 3697 | (1 << dev->devno))) |
| 3698 | continue; |
| 3699 | |
| 3700 | ata_eh_park_issue_cmd(dev, 0); |
| 3701 | ata_eh_done(link, dev, ATA_EH_PARK); |
| 3702 | } |
| 3703 | } |
| 3704 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3705 | /* the rest */ |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3706 | nr_fails = 0; |
| 3707 | ata_for_each_link(link, ap, PMP_FIRST) { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3708 | struct ata_eh_context *ehc = &link->eh_context; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3709 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3710 | if (sata_pmp_attached(ap) && ata_is_host_link(link)) |
| 3711 | goto config_lpm; |
| 3712 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3713 | /* revalidate existing devices and attach new ones */ |
| 3714 | rc = ata_eh_revalidate_and_attach(link, &dev); |
Tejun Heo | 4ae72a1 | 2007-02-02 16:22:30 +0900 | [diff] [blame] | 3715 | if (rc) |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3716 | goto rest_fail; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3717 | |
Tejun Heo | 633273a | 2007-09-23 13:19:54 +0900 | [diff] [blame] | 3718 | /* if PMP got attached, return, pmp EH will take care of it */ |
| 3719 | if (link->device->class == ATA_DEV_PMP) { |
| 3720 | ehc->i.action = 0; |
| 3721 | return 0; |
| 3722 | } |
| 3723 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3724 | /* configure transfer mode if necessary */ |
| 3725 | if (ehc->i.flags & ATA_EHI_SETMODE) { |
| 3726 | rc = ata_set_mode(link, &dev); |
| 3727 | if (rc) |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3728 | goto rest_fail; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3729 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
| 3730 | } |
| 3731 | |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3732 | /* If reset has been issued, clear UA to avoid |
| 3733 | * disrupting the current users of the device. |
| 3734 | */ |
| 3735 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3736 | ata_for_each_dev(dev, link, ALL) { |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3737 | if (dev->class != ATA_DEV_ATAPI) |
| 3738 | continue; |
| 3739 | rc = atapi_eh_clear_ua(dev); |
| 3740 | if (rc) |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3741 | goto rest_fail; |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3742 | } |
| 3743 | } |
| 3744 | |
Tejun Heo | 6013efd | 2009-11-19 15:36:45 +0900 | [diff] [blame] | 3745 | /* retry flush if necessary */ |
| 3746 | ata_for_each_dev(dev, link, ALL) { |
| 3747 | if (dev->class != ATA_DEV_ATA) |
| 3748 | continue; |
| 3749 | rc = ata_eh_maybe_retry_flush(dev); |
| 3750 | if (rc) |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3751 | goto rest_fail; |
Tejun Heo | 6013efd | 2009-11-19 15:36:45 +0900 | [diff] [blame] | 3752 | } |
| 3753 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3754 | config_lpm: |
Tejun Heo | 11fc33d | 2008-08-30 14:20:01 +0200 | [diff] [blame] | 3755 | /* configure link power saving */ |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3756 | if (link->lpm_policy != ap->target_lpm_policy) { |
| 3757 | rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev); |
| 3758 | if (rc) |
| 3759 | goto rest_fail; |
| 3760 | } |
Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 3761 | |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3762 | /* this link is okay now */ |
| 3763 | ehc->i.flags = 0; |
| 3764 | continue; |
| 3765 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3766 | rest_fail: |
| 3767 | nr_fails++; |
| 3768 | if (dev) |
| 3769 | ata_eh_handle_dev_fail(dev, rc); |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3770 | |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 3771 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
| 3772 | /* PMP reset requires working host port. |
| 3773 | * Can't retry if it's frozen. |
| 3774 | */ |
Tejun Heo | 071f44b | 2008-04-07 22:47:22 +0900 | [diff] [blame] | 3775 | if (sata_pmp_attached(ap)) |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 3776 | goto out; |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3777 | break; |
Tejun Heo | b06ce3e | 2007-10-09 15:06:48 +0900 | [diff] [blame] | 3778 | } |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3779 | } |
| 3780 | |
Tejun Heo | 6b7ae95 | 2010-09-01 17:50:06 +0200 | [diff] [blame] | 3781 | if (nr_fails) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3782 | goto retry; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3783 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3784 | out: |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3785 | if (rc && r_failed_link) |
| 3786 | *r_failed_link = link; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3787 | |
| 3788 | DPRINTK("EXIT, rc=%d\n", rc); |
| 3789 | return rc; |
| 3790 | } |
| 3791 | |
| 3792 | /** |
| 3793 | * ata_eh_finish - finish up EH |
| 3794 | * @ap: host port to finish EH for |
| 3795 | * |
| 3796 | * Recovery is complete. Clean up EH states and retry or finish |
| 3797 | * failed qcs. |
| 3798 | * |
| 3799 | * LOCKING: |
| 3800 | * None. |
| 3801 | */ |
Tejun Heo | fb7fd61 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3802 | void ata_eh_finish(struct ata_port *ap) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3803 | { |
| 3804 | int tag; |
| 3805 | |
| 3806 | /* retry or finish qcs */ |
| 3807 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
| 3808 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
| 3809 | |
| 3810 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
| 3811 | continue; |
| 3812 | |
| 3813 | if (qc->err_mask) { |
| 3814 | /* FIXME: Once EH migration is complete, |
| 3815 | * generate sense data in this function, |
| 3816 | * considering both err_mask and tf. |
| 3817 | */ |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 3818 | if (qc->flags & ATA_QCFLAG_RETRY) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3819 | ata_eh_qc_retry(qc); |
Tejun Heo | 03faab7 | 2008-03-27 19:14:24 +0900 | [diff] [blame] | 3820 | else |
| 3821 | ata_eh_qc_complete(qc); |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3822 | } else { |
| 3823 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { |
| 3824 | ata_eh_qc_complete(qc); |
| 3825 | } else { |
| 3826 | /* feed zero TF to sense generation */ |
| 3827 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); |
| 3828 | ata_eh_qc_retry(qc); |
| 3829 | } |
| 3830 | } |
| 3831 | } |
Tejun Heo | da917d6 | 2007-09-23 13:14:12 +0900 | [diff] [blame] | 3832 | |
| 3833 | /* make sure nr_active_links is zero after EH */ |
| 3834 | WARN_ON(ap->nr_active_links); |
| 3835 | ap->nr_active_links = 0; |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3836 | } |
| 3837 | |
| 3838 | /** |
| 3839 | * ata_do_eh - do standard error handling |
| 3840 | * @ap: host port to handle error for |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 3841 | * |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3842 | * @prereset: prereset method (can be NULL) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3843 | * @softreset: softreset method (can be NULL) |
| 3844 | * @hardreset: hardreset method (can be NULL) |
| 3845 | * @postreset: postreset method (can be NULL) |
| 3846 | * |
| 3847 | * Perform standard error handling sequence. |
| 3848 | * |
| 3849 | * LOCKING: |
| 3850 | * Kernel thread context (may sleep). |
| 3851 | */ |
Tejun Heo | f5914a4 | 2006-05-31 18:27:48 +0900 | [diff] [blame] | 3852 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
| 3853 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
| 3854 | ata_postreset_fn_t postreset) |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3855 | { |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3856 | struct ata_device *dev; |
| 3857 | int rc; |
| 3858 | |
| 3859 | ata_eh_autopsy(ap); |
| 3860 | ata_eh_report(ap); |
| 3861 | |
| 3862 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, |
| 3863 | NULL); |
| 3864 | if (rc) { |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 3865 | ata_for_each_dev(dev, &ap->link, ALL) |
Tejun Heo | 9b1e265 | 2007-08-06 18:36:24 +0900 | [diff] [blame] | 3866 | ata_dev_disable(dev); |
| 3867 | } |
| 3868 | |
Tejun Heo | 022bdb0 | 2006-05-15 20:58:22 +0900 | [diff] [blame] | 3869 | ata_eh_finish(ap); |
| 3870 | } |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3871 | |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 3872 | /** |
| 3873 | * ata_std_error_handler - standard error handler |
| 3874 | * @ap: host port to handle error for |
| 3875 | * |
| 3876 | * Standard error handler |
| 3877 | * |
| 3878 | * LOCKING: |
| 3879 | * Kernel thread context (may sleep). |
| 3880 | */ |
| 3881 | void ata_std_error_handler(struct ata_port *ap) |
| 3882 | { |
| 3883 | struct ata_port_operations *ops = ap->ops; |
| 3884 | ata_reset_fn_t hardreset = ops->hardreset; |
| 3885 | |
Tejun Heo | 57c9efd | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 3886 | /* ignore built-in hardreset if SCR access is not available */ |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 3887 | if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 3888 | hardreset = NULL; |
| 3889 | |
| 3890 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); |
| 3891 | } |
| 3892 | |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 3893 | #ifdef CONFIG_PM |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3894 | /** |
| 3895 | * ata_eh_handle_port_suspend - perform port suspend operation |
| 3896 | * @ap: port to suspend |
| 3897 | * |
| 3898 | * Suspend @ap. |
| 3899 | * |
| 3900 | * LOCKING: |
| 3901 | * Kernel thread context (may sleep). |
| 3902 | */ |
| 3903 | static void ata_eh_handle_port_suspend(struct ata_port *ap) |
| 3904 | { |
| 3905 | unsigned long flags; |
| 3906 | int rc = 0; |
| 3907 | |
| 3908 | /* are we suspending? */ |
| 3909 | spin_lock_irqsave(ap->lock, flags); |
| 3910 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || |
| 3911 | ap->pm_mesg.event == PM_EVENT_ON) { |
| 3912 | spin_unlock_irqrestore(ap->lock, flags); |
| 3913 | return; |
| 3914 | } |
| 3915 | spin_unlock_irqrestore(ap->lock, flags); |
| 3916 | |
| 3917 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); |
| 3918 | |
Tejun Heo | 64578a3 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3919 | /* tell ACPI we're suspending */ |
| 3920 | rc = ata_acpi_on_suspend(ap); |
| 3921 | if (rc) |
| 3922 | goto out; |
| 3923 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3924 | /* suspend */ |
| 3925 | ata_eh_freeze_port(ap); |
| 3926 | |
| 3927 | if (ap->ops->port_suspend) |
| 3928 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); |
| 3929 | |
Shaohua Li | bd3adca | 2007-11-02 09:32:38 +0800 | [diff] [blame] | 3930 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
Tejun Heo | 64578a3 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3931 | out: |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3932 | /* report result */ |
| 3933 | spin_lock_irqsave(ap->lock, flags); |
| 3934 | |
| 3935 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; |
| 3936 | if (rc == 0) |
| 3937 | ap->pflags |= ATA_PFLAG_SUSPENDED; |
Tejun Heo | 64578a3 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3938 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3939 | ata_port_schedule_eh(ap); |
| 3940 | |
| 3941 | if (ap->pm_result) { |
| 3942 | *ap->pm_result = rc; |
| 3943 | ap->pm_result = NULL; |
| 3944 | } |
| 3945 | |
| 3946 | spin_unlock_irqrestore(ap->lock, flags); |
| 3947 | |
| 3948 | return; |
| 3949 | } |
| 3950 | |
| 3951 | /** |
| 3952 | * ata_eh_handle_port_resume - perform port resume operation |
| 3953 | * @ap: port to resume |
| 3954 | * |
| 3955 | * Resume @ap. |
| 3956 | * |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3957 | * LOCKING: |
| 3958 | * Kernel thread context (may sleep). |
| 3959 | */ |
| 3960 | static void ata_eh_handle_port_resume(struct ata_port *ap) |
| 3961 | { |
Tejun Heo | 6f9c1ea | 2009-04-23 09:55:28 +0900 | [diff] [blame] | 3962 | struct ata_link *link; |
| 3963 | struct ata_device *dev; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3964 | unsigned long flags; |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 3965 | int rc = 0; |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3966 | |
| 3967 | /* are we resuming? */ |
| 3968 | spin_lock_irqsave(ap->lock, flags); |
| 3969 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || |
| 3970 | ap->pm_mesg.event != PM_EVENT_ON) { |
| 3971 | spin_unlock_irqrestore(ap->lock, flags); |
| 3972 | return; |
| 3973 | } |
| 3974 | spin_unlock_irqrestore(ap->lock, flags); |
| 3975 | |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 3976 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3977 | |
Tejun Heo | 6f9c1ea | 2009-04-23 09:55:28 +0900 | [diff] [blame] | 3978 | /* |
| 3979 | * Error timestamps are in jiffies which doesn't run while |
| 3980 | * suspended and PHY events during resume isn't too uncommon. |
| 3981 | * When the two are combined, it can lead to unnecessary speed |
| 3982 | * downs if the machine is suspended and resumed repeatedly. |
| 3983 | * Clear error history. |
| 3984 | */ |
| 3985 | ata_for_each_link(link, ap, HOST_FIRST) |
| 3986 | ata_for_each_dev(dev, link, ALL) |
| 3987 | ata_ering_clear(&dev->ering); |
| 3988 | |
Shaohua Li | bd3adca | 2007-11-02 09:32:38 +0800 | [diff] [blame] | 3989 | ata_acpi_set_state(ap, PMSG_ON); |
| 3990 | |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3991 | if (ap->ops->port_resume) |
| 3992 | rc = ap->ops->port_resume(ap); |
| 3993 | |
Tejun Heo | 6746544 | 2007-05-15 03:28:16 +0900 | [diff] [blame] | 3994 | /* tell ACPI that we're resuming */ |
| 3995 | ata_acpi_on_resume(ap); |
| 3996 | |
Tejun Heo | 9666f40 | 2007-05-04 21:27:47 +0200 | [diff] [blame] | 3997 | /* report result */ |
Tejun Heo | 500530f | 2006-07-03 16:07:27 +0900 | [diff] [blame] | 3998 | spin_lock_irqsave(ap->lock, flags); |
| 3999 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); |
| 4000 | if (ap->pm_result) { |
| 4001 | *ap->pm_result = rc; |
| 4002 | ap->pm_result = NULL; |
| 4003 | } |
| 4004 | spin_unlock_irqrestore(ap->lock, flags); |
| 4005 | } |
Tejun Heo | 6ffa01d | 2007-03-02 17:32:47 +0900 | [diff] [blame] | 4006 | #endif /* CONFIG_PM */ |