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ece1d636 TH |
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 | ||
ece1d636 | 35 | #include <linux/kernel.h> |
242f9dcb | 36 | #include <linux/blkdev.h> |
2855568b | 37 | #include <linux/pci.h> |
ece1d636 TH |
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> | |
c6fd2807 | 43 | #include "../scsi/scsi_transport_api.h" |
ece1d636 TH |
44 | |
45 | #include <linux/libata.h> | |
46 | ||
47 | #include "libata.h" | |
48 | ||
7d47e8d4 | 49 | enum { |
3884f7b0 | 50 | /* speed down verdicts */ |
7d47e8d4 TH |
51 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
52 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
53 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 54 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
55 | |
56 | /* error flags */ | |
57 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 58 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
3884f7b0 TH |
59 | |
60 | /* error categories */ | |
61 | ATA_ECAT_NONE = 0, | |
62 | ATA_ECAT_ATA_BUS = 1, | |
63 | ATA_ECAT_TOUT_HSM = 2, | |
64 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
65 | ATA_ECAT_DUBIOUS_NONE = 4, |
66 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
67 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
68 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
69 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 70 | |
87fbc5a0 TH |
71 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
72 | ||
0a2c0f56 TH |
73 | /* always put at least this amount of time between resets */ |
74 | ATA_EH_RESET_COOL_DOWN = 5000, | |
75 | ||
341c2c95 TH |
76 | /* Waiting in ->prereset can never be reliable. It's |
77 | * sometimes nice to wait there but it can't be depended upon; | |
78 | * otherwise, we wouldn't be resetting. Just give it enough | |
79 | * time for most drives to spin up. | |
80 | */ | |
81 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
82 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
83 | |
84 | ATA_EH_UA_TRIES = 5, | |
31daabda TH |
85 | }; |
86 | ||
87 | /* The following table determines how we sequence resets. Each entry | |
88 | * represents timeout for that try. The first try can be soft or | |
89 | * hardreset. All others are hardreset if available. In most cases | |
90 | * the first reset w/ 10sec timeout should succeed. Following entries | |
91 | * are mostly for error handling, hotplug and retarded devices. | |
92 | */ | |
93 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
94 | 10000, /* most drives spin up by 10sec */ |
95 | 10000, /* > 99% working drives spin up before 20sec */ | |
96 | 35000, /* give > 30 secs of idleness for retarded devices */ | |
97 | 5000, /* and sweet one last chance */ | |
d8af0eb6 | 98 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
99 | }; |
100 | ||
87fbc5a0 TH |
101 | static const unsigned long ata_eh_identify_timeouts[] = { |
102 | 5000, /* covers > 99% of successes and not too boring on failures */ | |
103 | 10000, /* combined time till here is enough even for media access */ | |
104 | 30000, /* for true idiots */ | |
105 | ULONG_MAX, | |
106 | }; | |
107 | ||
108 | static const unsigned long ata_eh_other_timeouts[] = { | |
109 | 5000, /* same rationale as identify timeout */ | |
110 | 10000, /* ditto */ | |
111 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
112 | ULONG_MAX, | |
113 | }; | |
114 | ||
115 | struct ata_eh_cmd_timeout_ent { | |
116 | const u8 *commands; | |
117 | const unsigned long *timeouts; | |
118 | }; | |
119 | ||
120 | /* The following table determines timeouts to use for EH internal | |
121 | * commands. Each table entry is a command class and matches the | |
122 | * commands the entry applies to and the timeout table to use. | |
123 | * | |
124 | * On the retry after a command timed out, the next timeout value from | |
125 | * the table is used. If the table doesn't contain further entries, | |
126 | * the last value is used. | |
127 | * | |
128 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
129 | * command class, so if SET_FEATURES times out on the first try, the | |
130 | * next try will use the second timeout value only for that class. | |
131 | */ | |
132 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
133 | static const struct ata_eh_cmd_timeout_ent | |
134 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
135 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
136 | .timeouts = ata_eh_identify_timeouts, }, | |
137 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), | |
138 | .timeouts = ata_eh_other_timeouts, }, | |
139 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
140 | .timeouts = ata_eh_other_timeouts, }, | |
141 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
142 | .timeouts = ata_eh_other_timeouts, }, | |
143 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
144 | .timeouts = ata_eh_other_timeouts, }, | |
145 | }; | |
146 | #undef CMDS | |
147 | ||
ad9e2762 | 148 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 149 | #ifdef CONFIG_PM |
500530f6 TH |
150 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
151 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
152 | #else /* CONFIG_PM */ |
153 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
154 | { } | |
155 | ||
156 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
157 | { } | |
6ffa01d8 | 158 | #endif /* CONFIG_PM */ |
ad9e2762 | 159 | |
b64bbc39 TH |
160 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
161 | va_list args) | |
162 | { | |
163 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
164 | ATA_EH_DESC_LEN - ehi->desc_len, | |
165 | fmt, args); | |
166 | } | |
167 | ||
168 | /** | |
169 | * __ata_ehi_push_desc - push error description without adding separator | |
170 | * @ehi: target EHI | |
171 | * @fmt: printf format string | |
172 | * | |
173 | * Format string according to @fmt and append it to @ehi->desc. | |
174 | * | |
175 | * LOCKING: | |
176 | * spin_lock_irqsave(host lock) | |
177 | */ | |
178 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
179 | { | |
180 | va_list args; | |
181 | ||
182 | va_start(args, fmt); | |
183 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
184 | va_end(args); | |
185 | } | |
186 | ||
187 | /** | |
188 | * ata_ehi_push_desc - push error description with separator | |
189 | * @ehi: target EHI | |
190 | * @fmt: printf format string | |
191 | * | |
192 | * Format string according to @fmt and append it to @ehi->desc. | |
193 | * If @ehi->desc is not empty, ", " is added in-between. | |
194 | * | |
195 | * LOCKING: | |
196 | * spin_lock_irqsave(host lock) | |
197 | */ | |
198 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
199 | { | |
200 | va_list args; | |
201 | ||
202 | if (ehi->desc_len) | |
203 | __ata_ehi_push_desc(ehi, ", "); | |
204 | ||
205 | va_start(args, fmt); | |
206 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
207 | va_end(args); | |
208 | } | |
209 | ||
210 | /** | |
211 | * ata_ehi_clear_desc - clean error description | |
212 | * @ehi: target EHI | |
213 | * | |
214 | * Clear @ehi->desc. | |
215 | * | |
216 | * LOCKING: | |
217 | * spin_lock_irqsave(host lock) | |
218 | */ | |
219 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
220 | { | |
221 | ehi->desc[0] = '\0'; | |
222 | ehi->desc_len = 0; | |
223 | } | |
224 | ||
cbcdd875 TH |
225 | /** |
226 | * ata_port_desc - append port description | |
227 | * @ap: target ATA port | |
228 | * @fmt: printf format string | |
229 | * | |
230 | * Format string according to @fmt and append it to port | |
231 | * description. If port description is not empty, " " is added | |
232 | * in-between. This function is to be used while initializing | |
233 | * ata_host. The description is printed on host registration. | |
234 | * | |
235 | * LOCKING: | |
236 | * None. | |
237 | */ | |
238 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
239 | { | |
240 | va_list args; | |
241 | ||
242 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
243 | ||
244 | if (ap->link.eh_info.desc_len) | |
245 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
246 | ||
247 | va_start(args, fmt); | |
248 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
249 | va_end(args); | |
250 | } | |
251 | ||
252 | #ifdef CONFIG_PCI | |
253 | ||
254 | /** | |
255 | * ata_port_pbar_desc - append PCI BAR description | |
256 | * @ap: target ATA port | |
257 | * @bar: target PCI BAR | |
258 | * @offset: offset into PCI BAR | |
259 | * @name: name of the area | |
260 | * | |
261 | * If @offset is negative, this function formats a string which | |
262 | * contains the name, address, size and type of the BAR and | |
263 | * appends it to the port description. If @offset is zero or | |
264 | * positive, only name and offsetted address is appended. | |
265 | * | |
266 | * LOCKING: | |
267 | * None. | |
268 | */ | |
269 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
270 | const char *name) | |
271 | { | |
272 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
273 | char *type = ""; | |
274 | unsigned long long start, len; | |
275 | ||
276 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
277 | type = "m"; | |
278 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
279 | type = "i"; | |
280 | ||
281 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
282 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
283 | ||
284 | if (offset < 0) | |
285 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
286 | else | |
e6a73ab1 AM |
287 | ata_port_desc(ap, "%s 0x%llx", name, |
288 | start + (unsigned long long)offset); | |
cbcdd875 TH |
289 | } |
290 | ||
291 | #endif /* CONFIG_PCI */ | |
292 | ||
87fbc5a0 TH |
293 | static int ata_lookup_timeout_table(u8 cmd) |
294 | { | |
295 | int i; | |
296 | ||
297 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
298 | const u8 *cur; | |
299 | ||
300 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
301 | if (*cur == cmd) | |
302 | return i; | |
303 | } | |
304 | ||
305 | return -1; | |
306 | } | |
307 | ||
308 | /** | |
309 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
310 | * @dev: target device | |
311 | * @cmd: internal command to be issued | |
312 | * | |
313 | * Determine timeout for internal command @cmd for @dev. | |
314 | * | |
315 | * LOCKING: | |
316 | * EH context. | |
317 | * | |
318 | * RETURNS: | |
319 | * Determined timeout. | |
320 | */ | |
321 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) | |
322 | { | |
323 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
324 | int ent = ata_lookup_timeout_table(cmd); | |
325 | int idx; | |
326 | ||
327 | if (ent < 0) | |
328 | return ATA_EH_CMD_DFL_TIMEOUT; | |
329 | ||
330 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
331 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
332 | } | |
333 | ||
334 | /** | |
335 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
336 | * @dev: target device | |
337 | * @cmd: internal command which timed out | |
338 | * | |
339 | * Notify EH that internal command @cmd for @dev timed out. This | |
340 | * function should be called only for commands whose timeouts are | |
341 | * determined using ata_internal_cmd_timeout(). | |
342 | * | |
343 | * LOCKING: | |
344 | * EH context. | |
345 | */ | |
346 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
347 | { | |
348 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
349 | int ent = ata_lookup_timeout_table(cmd); | |
350 | int idx; | |
351 | ||
352 | if (ent < 0) | |
353 | return; | |
354 | ||
355 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
356 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) | |
357 | ehc->cmd_timeout_idx[dev->devno][ent]++; | |
358 | } | |
359 | ||
3884f7b0 | 360 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
361 | unsigned int err_mask) |
362 | { | |
363 | struct ata_ering_entry *ent; | |
364 | ||
365 | WARN_ON(!err_mask); | |
366 | ||
367 | ering->cursor++; | |
368 | ering->cursor %= ATA_ERING_SIZE; | |
369 | ||
370 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 371 | ent->eflags = eflags; |
0c247c55 TH |
372 | ent->err_mask = err_mask; |
373 | ent->timestamp = get_jiffies_64(); | |
374 | } | |
375 | ||
76326ac1 TH |
376 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
377 | { | |
378 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
379 | ||
380 | if (ent->err_mask) | |
381 | return ent; | |
382 | return NULL; | |
383 | } | |
384 | ||
7d47e8d4 | 385 | static void ata_ering_clear(struct ata_ering *ering) |
0c247c55 | 386 | { |
7d47e8d4 | 387 | memset(ering, 0, sizeof(*ering)); |
0c247c55 TH |
388 | } |
389 | ||
390 | static int ata_ering_map(struct ata_ering *ering, | |
391 | int (*map_fn)(struct ata_ering_entry *, void *), | |
392 | void *arg) | |
393 | { | |
394 | int idx, rc = 0; | |
395 | struct ata_ering_entry *ent; | |
396 | ||
397 | idx = ering->cursor; | |
398 | do { | |
399 | ent = &ering->ring[idx]; | |
400 | if (!ent->err_mask) | |
401 | break; | |
402 | rc = map_fn(ent, arg); | |
403 | if (rc) | |
404 | break; | |
405 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
406 | } while (idx != ering->cursor); | |
407 | ||
408 | return rc; | |
409 | } | |
410 | ||
64f65ca6 TH |
411 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
412 | { | |
9af5c9c9 | 413 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
414 | |
415 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
416 | } | |
417 | ||
f58229f8 | 418 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
419 | struct ata_eh_info *ehi, unsigned int action) |
420 | { | |
f58229f8 | 421 | struct ata_device *tdev; |
af181c2d TH |
422 | |
423 | if (!dev) { | |
424 | ehi->action &= ~action; | |
f58229f8 TH |
425 | ata_link_for_each_dev(tdev, link) |
426 | ehi->dev_action[tdev->devno] &= ~action; | |
af181c2d TH |
427 | } else { |
428 | /* doesn't make sense for port-wide EH actions */ | |
429 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
430 | ||
431 | /* break ehi->action into ehi->dev_action */ | |
432 | if (ehi->action & action) { | |
f58229f8 TH |
433 | ata_link_for_each_dev(tdev, link) |
434 | ehi->dev_action[tdev->devno] |= | |
435 | ehi->action & action; | |
af181c2d TH |
436 | ehi->action &= ~action; |
437 | } | |
438 | ||
439 | /* turn off the specified per-dev action */ | |
440 | ehi->dev_action[dev->devno] &= ~action; | |
441 | } | |
442 | } | |
443 | ||
ece1d636 TH |
444 | /** |
445 | * ata_scsi_timed_out - SCSI layer time out callback | |
446 | * @cmd: timed out SCSI command | |
447 | * | |
448 | * Handles SCSI layer timeout. We race with normal completion of | |
449 | * the qc for @cmd. If the qc is already gone, we lose and let | |
450 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has | |
451 | * timed out and EH should be invoked. Prevent ata_qc_complete() | |
452 | * from finishing it by setting EH_SCHEDULED and return | |
453 | * EH_NOT_HANDLED. | |
454 | * | |
ad9e2762 TH |
455 | * TODO: kill this function once old EH is gone. |
456 | * | |
ece1d636 TH |
457 | * LOCKING: |
458 | * Called from timer context | |
459 | * | |
460 | * RETURNS: | |
461 | * EH_HANDLED or EH_NOT_HANDLED | |
462 | */ | |
242f9dcb | 463 | enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) |
ece1d636 TH |
464 | { |
465 | struct Scsi_Host *host = cmd->device->host; | |
35bb94b1 | 466 | struct ata_port *ap = ata_shost_to_port(host); |
ece1d636 TH |
467 | unsigned long flags; |
468 | struct ata_queued_cmd *qc; | |
242f9dcb | 469 | enum blk_eh_timer_return ret; |
ece1d636 TH |
470 | |
471 | DPRINTK("ENTER\n"); | |
472 | ||
ad9e2762 | 473 | if (ap->ops->error_handler) { |
242f9dcb | 474 | ret = BLK_EH_NOT_HANDLED; |
ad9e2762 TH |
475 | goto out; |
476 | } | |
477 | ||
242f9dcb | 478 | ret = BLK_EH_HANDLED; |
ba6a1308 | 479 | spin_lock_irqsave(ap->lock, flags); |
9af5c9c9 | 480 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
ece1d636 TH |
481 | if (qc) { |
482 | WARN_ON(qc->scsicmd != cmd); | |
483 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; | |
484 | qc->err_mask |= AC_ERR_TIMEOUT; | |
242f9dcb | 485 | ret = BLK_EH_NOT_HANDLED; |
ece1d636 | 486 | } |
ba6a1308 | 487 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 488 | |
ad9e2762 | 489 | out: |
ece1d636 TH |
490 | DPRINTK("EXIT, ret=%d\n", ret); |
491 | return ret; | |
492 | } | |
493 | ||
494 | /** | |
495 | * ata_scsi_error - SCSI layer error handler callback | |
496 | * @host: SCSI host on which error occurred | |
497 | * | |
498 | * Handles SCSI-layer-thrown error events. | |
499 | * | |
500 | * LOCKING: | |
501 | * Inherited from SCSI layer (none, can sleep) | |
502 | * | |
503 | * RETURNS: | |
504 | * Zero. | |
505 | */ | |
381544bb | 506 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 507 | { |
35bb94b1 | 508 | struct ata_port *ap = ata_shost_to_port(host); |
a1e10f7e | 509 | int i; |
ad9e2762 | 510 | unsigned long flags; |
ece1d636 TH |
511 | |
512 | DPRINTK("ENTER\n"); | |
513 | ||
ad9e2762 | 514 | /* synchronize with port task */ |
ece1d636 TH |
515 | ata_port_flush_task(ap); |
516 | ||
cca3974e | 517 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
518 | |
519 | /* For new EH, all qcs are finished in one of three ways - | |
520 | * normal completion, error completion, and SCSI timeout. | |
521 | * Both cmpletions can race against SCSI timeout. When normal | |
522 | * completion wins, the qc never reaches EH. When error | |
523 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
524 | * | |
525 | * When SCSI timeout wins, things are a bit more complex. | |
526 | * Normal or error completion can occur after the timeout but | |
527 | * before this point. In such cases, both types of | |
528 | * completions are honored. A scmd is determined to have | |
529 | * timed out iff its associated qc is active and not failed. | |
530 | */ | |
531 | if (ap->ops->error_handler) { | |
532 | struct scsi_cmnd *scmd, *tmp; | |
533 | int nr_timedout = 0; | |
534 | ||
e30349d2 | 535 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 TH |
536 | |
537 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { | |
538 | struct ata_queued_cmd *qc; | |
539 | ||
540 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
541 | qc = __ata_qc_from_tag(ap, i); | |
542 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
543 | qc->scsicmd == scmd) | |
544 | break; | |
545 | } | |
546 | ||
547 | if (i < ATA_MAX_QUEUE) { | |
548 | /* the scmd has an associated qc */ | |
549 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
550 | /* which hasn't failed yet, timeout */ | |
551 | qc->err_mask |= AC_ERR_TIMEOUT; | |
552 | qc->flags |= ATA_QCFLAG_FAILED; | |
553 | nr_timedout++; | |
554 | } | |
555 | } else { | |
556 | /* Normal completion occurred after | |
557 | * SCSI timeout but before this point. | |
558 | * Successfully complete it. | |
559 | */ | |
560 | scmd->retries = scmd->allowed; | |
561 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
562 | } | |
563 | } | |
564 | ||
565 | /* If we have timed out qcs. They belong to EH from | |
566 | * this point but the state of the controller is | |
567 | * unknown. Freeze the port to make sure the IRQ | |
568 | * handler doesn't diddle with those qcs. This must | |
569 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
570 | */ | |
571 | if (nr_timedout) | |
572 | __ata_port_freeze(ap); | |
573 | ||
e30349d2 | 574 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
575 | |
576 | /* initialize eh_tries */ | |
577 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 578 | } else |
e30349d2 | 579 | spin_unlock_wait(ap->lock); |
ad9e2762 TH |
580 | |
581 | repeat: | |
582 | /* invoke error handler */ | |
583 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
584 | struct ata_link *link; |
585 | ||
5ddf24c5 TH |
586 | /* kill fast drain timer */ |
587 | del_timer_sync(&ap->fastdrain_timer); | |
588 | ||
500530f6 TH |
589 | /* process port resume request */ |
590 | ata_eh_handle_port_resume(ap); | |
591 | ||
f3e81b19 | 592 | /* fetch & clear EH info */ |
e30349d2 | 593 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 594 | |
cf1b86c8 | 595 | __ata_port_for_each_link(link, ap) { |
00115e0f TH |
596 | struct ata_eh_context *ehc = &link->eh_context; |
597 | struct ata_device *dev; | |
598 | ||
cf1b86c8 TH |
599 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
600 | link->eh_context.i = link->eh_info; | |
601 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f TH |
602 | |
603 | ata_link_for_each_dev(dev, link) { | |
604 | int devno = dev->devno; | |
605 | ||
606 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
607 | if (ata_ncq_enabled(dev)) | |
608 | ehc->saved_ncq_enabled |= 1 << devno; | |
609 | } | |
0a2c0f56 TH |
610 | |
611 | /* set last reset timestamp to some time in the past */ | |
612 | ehc->last_reset = jiffies - 60 * HZ; | |
cf1b86c8 | 613 | } |
f3e81b19 | 614 | |
b51e9e5d TH |
615 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
616 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 617 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 618 | |
e30349d2 | 619 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 620 | |
500530f6 TH |
621 | /* invoke EH, skip if unloading or suspended */ |
622 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 TH |
623 | ap->ops->error_handler(ap); |
624 | else | |
625 | ata_eh_finish(ap); | |
ad9e2762 | 626 | |
500530f6 TH |
627 | /* process port suspend request */ |
628 | ata_eh_handle_port_suspend(ap); | |
629 | ||
ad9e2762 TH |
630 | /* Exception might have happend after ->error_handler |
631 | * recovered the port but before this point. Repeat | |
632 | * EH in such case. | |
633 | */ | |
e30349d2 | 634 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 635 | |
b51e9e5d | 636 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 637 | if (--ap->eh_tries) { |
e30349d2 | 638 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
639 | goto repeat; |
640 | } | |
641 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " | |
a1e10f7e | 642 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
914616a3 | 643 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
644 | } |
645 | ||
f3e81b19 | 646 | /* this run is complete, make sure EH info is clear */ |
cf1b86c8 TH |
647 | __ata_port_for_each_link(link, ap) |
648 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
f3e81b19 | 649 | |
e30349d2 | 650 | /* Clear host_eh_scheduled while holding ap->lock such |
ad9e2762 TH |
651 | * that if exception occurs after this point but |
652 | * before EH completion, SCSI midlayer will | |
653 | * re-initiate EH. | |
654 | */ | |
655 | host->host_eh_scheduled = 0; | |
656 | ||
e30349d2 | 657 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 658 | } else { |
9af5c9c9 | 659 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
660 | ap->ops->eng_timeout(ap); |
661 | } | |
ece1d636 | 662 | |
ad9e2762 | 663 | /* finish or retry handled scmd's and clean up */ |
ece1d636 TH |
664 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
665 | ||
666 | scsi_eh_flush_done_q(&ap->eh_done_q); | |
667 | ||
ad9e2762 | 668 | /* clean up */ |
e30349d2 | 669 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 670 | |
1cdaf534 | 671 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 672 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 673 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
52bad64d | 674 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, 0); |
1cdaf534 TH |
675 | |
676 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
677 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); | |
580b2102 | 678 | |
b51e9e5d | 679 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 680 | |
c6cf9e99 | 681 | /* tell wait_eh that we're done */ |
b51e9e5d | 682 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
683 | wake_up_all(&ap->eh_wait_q); |
684 | ||
e30349d2 | 685 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 686 | |
ece1d636 | 687 | DPRINTK("EXIT\n"); |
ece1d636 TH |
688 | } |
689 | ||
c6cf9e99 TH |
690 | /** |
691 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
692 | * @ap: Port to wait EH for | |
693 | * | |
694 | * Wait until the currently pending EH is complete. | |
695 | * | |
696 | * LOCKING: | |
697 | * Kernel thread context (may sleep). | |
698 | */ | |
699 | void ata_port_wait_eh(struct ata_port *ap) | |
700 | { | |
701 | unsigned long flags; | |
702 | DEFINE_WAIT(wait); | |
703 | ||
704 | retry: | |
ba6a1308 | 705 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 706 | |
b51e9e5d | 707 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 708 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 709 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 710 | schedule(); |
ba6a1308 | 711 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 712 | } |
0a1b622e | 713 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 714 | |
ba6a1308 | 715 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
716 | |
717 | /* make sure SCSI EH is complete */ | |
cca3974e | 718 | if (scsi_host_in_recovery(ap->scsi_host)) { |
c6cf9e99 TH |
719 | msleep(10); |
720 | goto retry; | |
721 | } | |
722 | } | |
723 | ||
5ddf24c5 TH |
724 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
725 | { | |
726 | unsigned int tag; | |
727 | int nr = 0; | |
728 | ||
729 | /* count only non-internal commands */ | |
730 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
731 | if (ata_qc_from_tag(ap, tag)) | |
732 | nr++; | |
733 | ||
734 | return nr; | |
735 | } | |
736 | ||
737 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
738 | { | |
739 | struct ata_port *ap = (void *)arg; | |
740 | unsigned long flags; | |
741 | int cnt; | |
742 | ||
743 | spin_lock_irqsave(ap->lock, flags); | |
744 | ||
745 | cnt = ata_eh_nr_in_flight(ap); | |
746 | ||
747 | /* are we done? */ | |
748 | if (!cnt) | |
749 | goto out_unlock; | |
750 | ||
751 | if (cnt == ap->fastdrain_cnt) { | |
752 | unsigned int tag; | |
753 | ||
754 | /* No progress during the last interval, tag all | |
755 | * in-flight qcs as timed out and freeze the port. | |
756 | */ | |
757 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
758 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
759 | if (qc) | |
760 | qc->err_mask |= AC_ERR_TIMEOUT; | |
761 | } | |
762 | ||
763 | ata_port_freeze(ap); | |
764 | } else { | |
765 | /* some qcs have finished, give it another chance */ | |
766 | ap->fastdrain_cnt = cnt; | |
767 | ap->fastdrain_timer.expires = | |
341c2c95 | 768 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
769 | add_timer(&ap->fastdrain_timer); |
770 | } | |
771 | ||
772 | out_unlock: | |
773 | spin_unlock_irqrestore(ap->lock, flags); | |
774 | } | |
775 | ||
776 | /** | |
777 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
778 | * @ap: target ATA port | |
779 | * @fastdrain: activate fast drain | |
780 | * | |
781 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
782 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
783 | * that EH kicks in in timely manner. | |
784 | * | |
785 | * LOCKING: | |
786 | * spin_lock_irqsave(host lock) | |
787 | */ | |
788 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
789 | { | |
790 | int cnt; | |
791 | ||
792 | /* already scheduled? */ | |
793 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
794 | return; | |
795 | ||
796 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
797 | ||
798 | if (!fastdrain) | |
799 | return; | |
800 | ||
801 | /* do we have in-flight qcs? */ | |
802 | cnt = ata_eh_nr_in_flight(ap); | |
803 | if (!cnt) | |
804 | return; | |
805 | ||
806 | /* activate fast drain */ | |
807 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
808 | ap->fastdrain_timer.expires = |
809 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
810 | add_timer(&ap->fastdrain_timer); |
811 | } | |
812 | ||
f686bcb8 TH |
813 | /** |
814 | * ata_qc_schedule_eh - schedule qc for error handling | |
815 | * @qc: command to schedule error handling for | |
816 | * | |
817 | * Schedule error handling for @qc. EH will kick in as soon as | |
818 | * other commands are drained. | |
819 | * | |
820 | * LOCKING: | |
cca3974e | 821 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
822 | */ |
823 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
824 | { | |
825 | struct ata_port *ap = qc->ap; | |
826 | ||
827 | WARN_ON(!ap->ops->error_handler); | |
828 | ||
829 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 830 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
831 | |
832 | /* The following will fail if timeout has already expired. | |
833 | * ata_scsi_error() takes care of such scmds on EH entry. | |
834 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
835 | * this function completes. | |
836 | */ | |
242f9dcb | 837 | blk_abort_request(qc->scsicmd->request); |
f686bcb8 TH |
838 | } |
839 | ||
7b70fc03 TH |
840 | /** |
841 | * ata_port_schedule_eh - schedule error handling without a qc | |
842 | * @ap: ATA port to schedule EH for | |
843 | * | |
844 | * Schedule error handling for @ap. EH will kick in as soon as | |
845 | * all commands are drained. | |
846 | * | |
847 | * LOCKING: | |
cca3974e | 848 | * spin_lock_irqsave(host lock) |
7b70fc03 TH |
849 | */ |
850 | void ata_port_schedule_eh(struct ata_port *ap) | |
851 | { | |
852 | WARN_ON(!ap->ops->error_handler); | |
853 | ||
f4d6d004 TH |
854 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
855 | return; | |
856 | ||
5ddf24c5 | 857 | ata_eh_set_pending(ap, 1); |
cca3974e | 858 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
859 | |
860 | DPRINTK("port EH scheduled\n"); | |
861 | } | |
862 | ||
dbd82616 | 863 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
864 | { |
865 | int tag, nr_aborted = 0; | |
866 | ||
867 | WARN_ON(!ap->ops->error_handler); | |
868 | ||
5ddf24c5 TH |
869 | /* we're gonna abort all commands, no need for fast drain */ |
870 | ata_eh_set_pending(ap, 0); | |
871 | ||
7b70fc03 TH |
872 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
873 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
874 | ||
dbd82616 | 875 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
876 | qc->flags |= ATA_QCFLAG_FAILED; |
877 | ata_qc_complete(qc); | |
878 | nr_aborted++; | |
879 | } | |
880 | } | |
881 | ||
882 | if (!nr_aborted) | |
883 | ata_port_schedule_eh(ap); | |
884 | ||
885 | return nr_aborted; | |
886 | } | |
887 | ||
dbd82616 TH |
888 | /** |
889 | * ata_link_abort - abort all qc's on the link | |
890 | * @link: ATA link to abort qc's for | |
891 | * | |
892 | * Abort all active qc's active on @link and schedule EH. | |
893 | * | |
894 | * LOCKING: | |
895 | * spin_lock_irqsave(host lock) | |
896 | * | |
897 | * RETURNS: | |
898 | * Number of aborted qc's. | |
899 | */ | |
900 | int ata_link_abort(struct ata_link *link) | |
901 | { | |
902 | return ata_do_link_abort(link->ap, link); | |
903 | } | |
904 | ||
905 | /** | |
906 | * ata_port_abort - abort all qc's on the port | |
907 | * @ap: ATA port to abort qc's for | |
908 | * | |
909 | * Abort all active qc's of @ap and schedule EH. | |
910 | * | |
911 | * LOCKING: | |
912 | * spin_lock_irqsave(host_set lock) | |
913 | * | |
914 | * RETURNS: | |
915 | * Number of aborted qc's. | |
916 | */ | |
917 | int ata_port_abort(struct ata_port *ap) | |
918 | { | |
919 | return ata_do_link_abort(ap, NULL); | |
920 | } | |
921 | ||
e3180499 TH |
922 | /** |
923 | * __ata_port_freeze - freeze port | |
924 | * @ap: ATA port to freeze | |
925 | * | |
926 | * This function is called when HSM violation or some other | |
927 | * condition disrupts normal operation of the port. Frozen port | |
928 | * is not allowed to perform any operation until the port is | |
929 | * thawed, which usually follows a successful reset. | |
930 | * | |
931 | * ap->ops->freeze() callback can be used for freezing the port | |
932 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
933 | * port cannot be frozen hardware-wise, the interrupt handler | |
934 | * must ack and clear interrupts unconditionally while the port | |
935 | * is frozen. | |
936 | * | |
937 | * LOCKING: | |
cca3974e | 938 | * spin_lock_irqsave(host lock) |
e3180499 TH |
939 | */ |
940 | static void __ata_port_freeze(struct ata_port *ap) | |
941 | { | |
942 | WARN_ON(!ap->ops->error_handler); | |
943 | ||
944 | if (ap->ops->freeze) | |
945 | ap->ops->freeze(ap); | |
946 | ||
b51e9e5d | 947 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 948 | |
44877b4e | 949 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
950 | } |
951 | ||
952 | /** | |
953 | * ata_port_freeze - abort & freeze port | |
954 | * @ap: ATA port to freeze | |
955 | * | |
956 | * Abort and freeze @ap. | |
957 | * | |
958 | * LOCKING: | |
cca3974e | 959 | * spin_lock_irqsave(host lock) |
e3180499 TH |
960 | * |
961 | * RETURNS: | |
962 | * Number of aborted commands. | |
963 | */ | |
964 | int ata_port_freeze(struct ata_port *ap) | |
965 | { | |
966 | int nr_aborted; | |
967 | ||
968 | WARN_ON(!ap->ops->error_handler); | |
969 | ||
970 | nr_aborted = ata_port_abort(ap); | |
971 | __ata_port_freeze(ap); | |
972 | ||
973 | return nr_aborted; | |
974 | } | |
975 | ||
7d77b247 TH |
976 | /** |
977 | * sata_async_notification - SATA async notification handler | |
978 | * @ap: ATA port where async notification is received | |
979 | * | |
980 | * Handler to be called when async notification via SDB FIS is | |
981 | * received. This function schedules EH if necessary. | |
982 | * | |
983 | * LOCKING: | |
984 | * spin_lock_irqsave(host lock) | |
985 | * | |
986 | * RETURNS: | |
987 | * 1 if EH is scheduled, 0 otherwise. | |
988 | */ | |
989 | int sata_async_notification(struct ata_port *ap) | |
990 | { | |
991 | u32 sntf; | |
992 | int rc; | |
993 | ||
994 | if (!(ap->flags & ATA_FLAG_AN)) | |
995 | return 0; | |
996 | ||
997 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
998 | if (rc == 0) | |
999 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1000 | ||
071f44b1 | 1001 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1002 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1003 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1004 | /* PMP is not attached. Check whether ATAPI |
1005 | * AN is configured. If so, notify media | |
1006 | * change. | |
1007 | */ | |
1008 | struct ata_device *dev = ap->link.device; | |
1009 | ||
1010 | if ((dev->class == ATA_DEV_ATAPI) && | |
1011 | (dev->flags & ATA_DFLAG_AN)) | |
1012 | ata_scsi_media_change_notify(dev); | |
1013 | return 0; | |
1014 | } else { | |
1015 | /* PMP is attached but SNTF is not available. | |
1016 | * ATAPI async media change notification is | |
1017 | * not used. The PMP must be reporting PHY | |
1018 | * status change, schedule EH. | |
1019 | */ | |
1020 | ata_port_schedule_eh(ap); | |
1021 | return 1; | |
1022 | } | |
1023 | } else { | |
1024 | /* PMP is attached and SNTF is available */ | |
1025 | struct ata_link *link; | |
1026 | ||
1027 | /* check and notify ATAPI AN */ | |
1028 | ata_port_for_each_link(link, ap) { | |
1029 | if (!(sntf & (1 << link->pmp))) | |
1030 | continue; | |
1031 | ||
1032 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1033 | (link->device->flags & ATA_DFLAG_AN)) | |
1034 | ata_scsi_media_change_notify(link->device); | |
1035 | } | |
1036 | ||
1037 | /* If PMP is reporting that PHY status of some | |
1038 | * downstream ports has changed, schedule EH. | |
1039 | */ | |
1040 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1041 | ata_port_schedule_eh(ap); | |
1042 | return 1; | |
1043 | } | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | } | |
1048 | ||
e3180499 TH |
1049 | /** |
1050 | * ata_eh_freeze_port - EH helper to freeze port | |
1051 | * @ap: ATA port to freeze | |
1052 | * | |
1053 | * Freeze @ap. | |
1054 | * | |
1055 | * LOCKING: | |
1056 | * None. | |
1057 | */ | |
1058 | void ata_eh_freeze_port(struct ata_port *ap) | |
1059 | { | |
1060 | unsigned long flags; | |
1061 | ||
1062 | if (!ap->ops->error_handler) | |
1063 | return; | |
1064 | ||
ba6a1308 | 1065 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1066 | __ata_port_freeze(ap); |
ba6a1308 | 1067 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1068 | } |
1069 | ||
1070 | /** | |
1071 | * ata_port_thaw_port - EH helper to thaw port | |
1072 | * @ap: ATA port to thaw | |
1073 | * | |
1074 | * Thaw frozen port @ap. | |
1075 | * | |
1076 | * LOCKING: | |
1077 | * None. | |
1078 | */ | |
1079 | void ata_eh_thaw_port(struct ata_port *ap) | |
1080 | { | |
1081 | unsigned long flags; | |
1082 | ||
1083 | if (!ap->ops->error_handler) | |
1084 | return; | |
1085 | ||
ba6a1308 | 1086 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1087 | |
b51e9e5d | 1088 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1089 | |
1090 | if (ap->ops->thaw) | |
1091 | ap->ops->thaw(ap); | |
1092 | ||
ba6a1308 | 1093 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1094 | |
44877b4e | 1095 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1096 | } |
1097 | ||
ece1d636 TH |
1098 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1099 | { | |
1100 | /* nada */ | |
1101 | } | |
1102 | ||
1103 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1104 | { | |
1105 | struct ata_port *ap = qc->ap; | |
1106 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1107 | unsigned long flags; | |
1108 | ||
ba6a1308 | 1109 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1110 | qc->scsidone = ata_eh_scsidone; |
1111 | __ata_qc_complete(qc); | |
1112 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1113 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1114 | |
1115 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1116 | } | |
1117 | ||
1118 | /** | |
1119 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1120 | * @qc: Command to complete | |
1121 | * | |
1122 | * Indicate to the mid and upper layers that an ATA command has | |
1123 | * completed. To be used from EH. | |
1124 | */ | |
1125 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1126 | { | |
1127 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1128 | scmd->retries = scmd->allowed; | |
1129 | __ata_eh_qc_complete(qc); | |
1130 | } | |
1131 | ||
1132 | /** | |
1133 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1134 | * @qc: Command to retry | |
1135 | * | |
1136 | * Indicate to the mid and upper layers that an ATA command | |
1137 | * should be retried. To be used from EH. | |
1138 | * | |
1139 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
1140 | * scmd->retries is decremented for commands which get retried | |
1141 | * due to unrelated failures (qc->err_mask is zero). | |
1142 | */ | |
1143 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1144 | { | |
1145 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1146 | if (!qc->err_mask && scmd->retries) | |
1147 | scmd->retries--; | |
1148 | __ata_eh_qc_complete(qc); | |
1149 | } | |
022bdb07 | 1150 | |
0ea035a3 TH |
1151 | /** |
1152 | * ata_eh_detach_dev - detach ATA device | |
1153 | * @dev: ATA device to detach | |
1154 | * | |
1155 | * Detach @dev. | |
1156 | * | |
1157 | * LOCKING: | |
1158 | * None. | |
1159 | */ | |
fb7fd614 | 1160 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1161 | { |
f58229f8 TH |
1162 | struct ata_link *link = dev->link; |
1163 | struct ata_port *ap = link->ap; | |
0ea035a3 TH |
1164 | unsigned long flags; |
1165 | ||
1166 | ata_dev_disable(dev); | |
1167 | ||
ba6a1308 | 1168 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1169 | |
1170 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1171 | ||
1172 | if (ata_scsi_offline_dev(dev)) { | |
1173 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1174 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1175 | } |
1176 | ||
beb07c1a | 1177 | /* clear per-dev EH actions */ |
f58229f8 TH |
1178 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1179 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
beb07c1a | 1180 | |
ba6a1308 | 1181 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1182 | } |
1183 | ||
022bdb07 TH |
1184 | /** |
1185 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1186 | * @link: target ATA link |
47005f25 | 1187 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1188 | * @action: action about to be performed |
1189 | * | |
1190 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1191 | * in @link->eh_info such that eh actions are not unnecessarily |
1192 | * repeated. | |
022bdb07 TH |
1193 | * |
1194 | * LOCKING: | |
1195 | * None. | |
1196 | */ | |
fb7fd614 TH |
1197 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1198 | unsigned int action) | |
022bdb07 | 1199 | { |
955e57df TH |
1200 | struct ata_port *ap = link->ap; |
1201 | struct ata_eh_info *ehi = &link->eh_info; | |
1202 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1203 | unsigned long flags; |
1204 | ||
ba6a1308 | 1205 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1206 | |
955e57df | 1207 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1208 | |
13abf50d | 1209 | if (!(ehc->i.flags & ATA_EHI_QUIET)) |
1cdaf534 TH |
1210 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1211 | ||
ba6a1308 | 1212 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1213 | } |
1214 | ||
47005f25 TH |
1215 | /** |
1216 | * ata_eh_done - EH action complete | |
955e57df | 1217 | * @ap: target ATA port |
47005f25 TH |
1218 | * @dev: target ATA dev for per-dev action (can be NULL) |
1219 | * @action: action just completed | |
1220 | * | |
1221 | * Called right after performing EH actions to clear related bits | |
955e57df | 1222 | * in @link->eh_context. |
47005f25 TH |
1223 | * |
1224 | * LOCKING: | |
1225 | * None. | |
1226 | */ | |
fb7fd614 TH |
1227 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1228 | unsigned int action) | |
47005f25 | 1229 | { |
955e57df | 1230 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1231 | |
955e57df | 1232 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1233 | } |
1234 | ||
022bdb07 TH |
1235 | /** |
1236 | * ata_err_string - convert err_mask to descriptive string | |
1237 | * @err_mask: error mask to convert to string | |
1238 | * | |
1239 | * Convert @err_mask to descriptive string. Errors are | |
1240 | * prioritized according to severity and only the most severe | |
1241 | * error is reported. | |
1242 | * | |
1243 | * LOCKING: | |
1244 | * None. | |
1245 | * | |
1246 | * RETURNS: | |
1247 | * Descriptive string for @err_mask | |
1248 | */ | |
2dcb407e | 1249 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1250 | { |
1251 | if (err_mask & AC_ERR_HOST_BUS) | |
1252 | return "host bus error"; | |
1253 | if (err_mask & AC_ERR_ATA_BUS) | |
1254 | return "ATA bus error"; | |
1255 | if (err_mask & AC_ERR_TIMEOUT) | |
1256 | return "timeout"; | |
1257 | if (err_mask & AC_ERR_HSM) | |
1258 | return "HSM violation"; | |
1259 | if (err_mask & AC_ERR_SYSTEM) | |
1260 | return "internal error"; | |
1261 | if (err_mask & AC_ERR_MEDIA) | |
1262 | return "media error"; | |
1263 | if (err_mask & AC_ERR_INVALID) | |
1264 | return "invalid argument"; | |
1265 | if (err_mask & AC_ERR_DEV) | |
1266 | return "device error"; | |
1267 | return "unknown error"; | |
1268 | } | |
1269 | ||
e8ee8451 TH |
1270 | /** |
1271 | * ata_read_log_page - read a specific log page | |
1272 | * @dev: target device | |
1273 | * @page: page to read | |
1274 | * @buf: buffer to store read page | |
1275 | * @sectors: number of sectors to read | |
1276 | * | |
1277 | * Read log page using READ_LOG_EXT command. | |
1278 | * | |
1279 | * LOCKING: | |
1280 | * Kernel thread context (may sleep). | |
1281 | * | |
1282 | * RETURNS: | |
1283 | * 0 on success, AC_ERR_* mask otherwise. | |
1284 | */ | |
1285 | static unsigned int ata_read_log_page(struct ata_device *dev, | |
1286 | u8 page, void *buf, unsigned int sectors) | |
1287 | { | |
1288 | struct ata_taskfile tf; | |
1289 | unsigned int err_mask; | |
1290 | ||
1291 | DPRINTK("read log page - page %d\n", page); | |
1292 | ||
1293 | ata_tf_init(dev, &tf); | |
1294 | tf.command = ATA_CMD_READ_LOG_EXT; | |
1295 | tf.lbal = page; | |
1296 | tf.nsect = sectors; | |
1297 | tf.hob_nsect = sectors >> 8; | |
1298 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
1299 | tf.protocol = ATA_PROT_PIO; | |
1300 | ||
1301 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1302 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 TH |
1303 | |
1304 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
1305 | return err_mask; | |
1306 | } | |
1307 | ||
1308 | /** | |
1309 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1310 | * @dev: Device to read log page 10h from | |
1311 | * @tag: Resulting tag of the failed command | |
1312 | * @tf: Resulting taskfile registers of the failed command | |
1313 | * | |
1314 | * Read log page 10h to obtain NCQ error details and clear error | |
1315 | * condition. | |
1316 | * | |
1317 | * LOCKING: | |
1318 | * Kernel thread context (may sleep). | |
1319 | * | |
1320 | * RETURNS: | |
1321 | * 0 on success, -errno otherwise. | |
1322 | */ | |
1323 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1324 | int *tag, struct ata_taskfile *tf) | |
1325 | { | |
9af5c9c9 | 1326 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1327 | unsigned int err_mask; |
1328 | u8 csum; | |
1329 | int i; | |
1330 | ||
1331 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); | |
1332 | if (err_mask) | |
1333 | return -EIO; | |
1334 | ||
1335 | csum = 0; | |
1336 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1337 | csum += buf[i]; | |
1338 | if (csum) | |
1339 | ata_dev_printk(dev, KERN_WARNING, | |
1340 | "invalid checksum 0x%x on log page 10h\n", csum); | |
1341 | ||
1342 | if (buf[0] & 0x80) | |
1343 | return -ENOENT; | |
1344 | ||
1345 | *tag = buf[0] & 0x1f; | |
1346 | ||
1347 | tf->command = buf[2]; | |
1348 | tf->feature = buf[3]; | |
1349 | tf->lbal = buf[4]; | |
1350 | tf->lbam = buf[5]; | |
1351 | tf->lbah = buf[6]; | |
1352 | tf->device = buf[7]; | |
1353 | tf->hob_lbal = buf[8]; | |
1354 | tf->hob_lbam = buf[9]; | |
1355 | tf->hob_lbah = buf[10]; | |
1356 | tf->nsect = buf[12]; | |
1357 | tf->hob_nsect = buf[13]; | |
1358 | ||
1359 | return 0; | |
1360 | } | |
1361 | ||
11fc33da TH |
1362 | /** |
1363 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1364 | * @dev: target ATAPI device | |
1365 | * @r_sense_key: out parameter for sense_key | |
1366 | * | |
1367 | * Perform ATAPI TEST_UNIT_READY. | |
1368 | * | |
1369 | * LOCKING: | |
1370 | * EH context (may sleep). | |
1371 | * | |
1372 | * RETURNS: | |
1373 | * 0 on success, AC_ERR_* mask on failure. | |
1374 | */ | |
1375 | static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) | |
1376 | { | |
1377 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1378 | struct ata_taskfile tf; | |
1379 | unsigned int err_mask; | |
1380 | ||
1381 | ata_tf_init(dev, &tf); | |
1382 | ||
1383 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1384 | tf.command = ATA_CMD_PACKET; | |
1385 | tf.protocol = ATAPI_PROT_NODATA; | |
1386 | ||
1387 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1388 | if (err_mask == AC_ERR_DEV) | |
1389 | *r_sense_key = tf.feature >> 4; | |
1390 | return err_mask; | |
1391 | } | |
1392 | ||
022bdb07 TH |
1393 | /** |
1394 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1395 | * @dev: device to perform REQUEST_SENSE to | |
1396 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1397 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1398 | * |
1399 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1400 | * SENSE. This function is EH helper. | |
1401 | * | |
1402 | * LOCKING: | |
1403 | * Kernel thread context (may sleep). | |
1404 | * | |
1405 | * RETURNS: | |
1406 | * 0 on success, AC_ERR_* mask on failure | |
1407 | */ | |
3eabddb8 TH |
1408 | static unsigned int atapi_eh_request_sense(struct ata_device *dev, |
1409 | u8 *sense_buf, u8 dfl_sense_key) | |
022bdb07 | 1410 | { |
3eabddb8 TH |
1411 | u8 cdb[ATAPI_CDB_LEN] = |
1412 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1413 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1414 | struct ata_taskfile tf; |
022bdb07 TH |
1415 | |
1416 | DPRINTK("ATAPI request sense\n"); | |
1417 | ||
022bdb07 TH |
1418 | /* FIXME: is this needed? */ |
1419 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
1420 | ||
56287768 AL |
1421 | /* initialize sense_buf with the error register, |
1422 | * for the case where they are -not- overwritten | |
1423 | */ | |
022bdb07 | 1424 | sense_buf[0] = 0x70; |
3eabddb8 | 1425 | sense_buf[2] = dfl_sense_key; |
56287768 | 1426 | |
a617c09f | 1427 | /* some devices time out if garbage left in tf */ |
56287768 | 1428 | ata_tf_init(dev, &tf); |
022bdb07 | 1429 | |
022bdb07 TH |
1430 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1431 | tf.command = ATA_CMD_PACKET; | |
1432 | ||
1433 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1434 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1435 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1436 | tf.feature |= ATAPI_PKT_DMA; |
1437 | } else { | |
0dc36888 | 1438 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1439 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1440 | tf.lbah = 0; | |
022bdb07 TH |
1441 | } |
1442 | ||
1443 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1444 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1445 | } |
1446 | ||
1447 | /** | |
1448 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1449 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1450 | * |
1451 | * Analyze SError if available and further determine cause of | |
1452 | * failure. | |
1453 | * | |
1454 | * LOCKING: | |
1455 | * None. | |
1456 | */ | |
0260731f | 1457 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1458 | { |
0260731f | 1459 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1460 | u32 serror = ehc->i.serror; |
1461 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1462 | u32 hotplug_mask; |
022bdb07 | 1463 | |
e0614db2 | 1464 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1465 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1466 | action |= ATA_EH_RESET; |
022bdb07 TH |
1467 | } |
1468 | if (serror & SERR_PROTOCOL) { | |
1469 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1470 | action |= ATA_EH_RESET; |
022bdb07 TH |
1471 | } |
1472 | if (serror & SERR_INTERNAL) { | |
1473 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1474 | action |= ATA_EH_RESET; |
022bdb07 | 1475 | } |
f9df58cb TH |
1476 | |
1477 | /* Determine whether a hotplug event has occurred. Both | |
1478 | * SError.N/X are considered hotplug events for enabled or | |
1479 | * host links. For disabled PMP links, only N bit is | |
1480 | * considered as X bit is left at 1 for link plugging. | |
1481 | */ | |
1482 | hotplug_mask = 0; | |
1483 | ||
1484 | if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
1485 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; | |
1486 | else | |
1487 | hotplug_mask = SERR_PHYRDY_CHG; | |
1488 | ||
1489 | if (serror & hotplug_mask) | |
084fe639 | 1490 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1491 | |
1492 | ehc->i.err_mask |= err_mask; | |
1493 | ehc->i.action |= action; | |
1494 | } | |
1495 | ||
e8ee8451 TH |
1496 | /** |
1497 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1498 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1499 | * |
1500 | * Read log page 10h, determine the offending qc and acquire | |
1501 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1502 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1503 | * care of the rest. | |
1504 | * | |
1505 | * LOCKING: | |
1506 | * Kernel thread context (may sleep). | |
1507 | */ | |
10acf3b0 | 1508 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1509 | { |
0260731f TH |
1510 | struct ata_port *ap = link->ap; |
1511 | struct ata_eh_context *ehc = &link->eh_context; | |
1512 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1513 | struct ata_queued_cmd *qc; |
1514 | struct ata_taskfile tf; | |
1515 | int tag, rc; | |
1516 | ||
1517 | /* if frozen, we can't do much */ | |
b51e9e5d | 1518 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1519 | return; |
1520 | ||
1521 | /* is it NCQ device error? */ | |
0260731f | 1522 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1523 | return; |
1524 | ||
1525 | /* has LLDD analyzed already? */ | |
1526 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1527 | qc = __ata_qc_from_tag(ap, tag); | |
1528 | ||
1529 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1530 | continue; | |
1531 | ||
1532 | if (qc->err_mask) | |
1533 | return; | |
1534 | } | |
1535 | ||
1536 | /* okay, this error is ours */ | |
1537 | rc = ata_eh_read_log_10h(dev, &tag, &tf); | |
1538 | if (rc) { | |
0260731f | 1539 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
e8ee8451 TH |
1540 | "(errno=%d)\n", rc); |
1541 | return; | |
1542 | } | |
1543 | ||
0260731f TH |
1544 | if (!(link->sactive & (1 << tag))) { |
1545 | ata_link_printk(link, KERN_ERR, "log page 10h reported " | |
e8ee8451 TH |
1546 | "inactive tag %d\n", tag); |
1547 | return; | |
1548 | } | |
1549 | ||
1550 | /* we've got the perpetrator, condemn it */ | |
1551 | qc = __ata_qc_from_tag(ap, tag); | |
1552 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1553 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1554 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
e8ee8451 TH |
1555 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1556 | } | |
1557 | ||
022bdb07 TH |
1558 | /** |
1559 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1560 | * @qc: qc to analyze | |
1561 | * @tf: Taskfile registers to analyze | |
1562 | * | |
1563 | * Analyze taskfile of @qc and further determine cause of | |
1564 | * failure. This function also requests ATAPI sense data if | |
1565 | * avaliable. | |
1566 | * | |
1567 | * LOCKING: | |
1568 | * Kernel thread context (may sleep). | |
1569 | * | |
1570 | * RETURNS: | |
1571 | * Determined recovery action | |
1572 | */ | |
1573 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1574 | const struct ata_taskfile *tf) | |
1575 | { | |
1576 | unsigned int tmp, action = 0; | |
1577 | u8 stat = tf->command, err = tf->feature; | |
1578 | ||
1579 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1580 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1581 | return ATA_EH_RESET; |
022bdb07 TH |
1582 | } |
1583 | ||
a51d644a TH |
1584 | if (stat & (ATA_ERR | ATA_DF)) |
1585 | qc->err_mask |= AC_ERR_DEV; | |
1586 | else | |
022bdb07 TH |
1587 | return 0; |
1588 | ||
1589 | switch (qc->dev->class) { | |
1590 | case ATA_DEV_ATA: | |
1591 | if (err & ATA_ICRC) | |
1592 | qc->err_mask |= AC_ERR_ATA_BUS; | |
1593 | if (err & ATA_UNC) | |
1594 | qc->err_mask |= AC_ERR_MEDIA; | |
1595 | if (err & ATA_IDNF) | |
1596 | qc->err_mask |= AC_ERR_INVALID; | |
1597 | break; | |
1598 | ||
1599 | case ATA_DEV_ATAPI: | |
a569a30d | 1600 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1601 | tmp = atapi_eh_request_sense(qc->dev, |
1602 | qc->scsicmd->sense_buffer, | |
1603 | qc->result_tf.feature >> 4); | |
a569a30d TH |
1604 | if (!tmp) { |
1605 | /* ATA_QCFLAG_SENSE_VALID is used to | |
1606 | * tell atapi_qc_complete() that sense | |
1607 | * data is already valid. | |
1608 | * | |
1609 | * TODO: interpret sense data and set | |
1610 | * appropriate err_mask. | |
1611 | */ | |
1612 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
1613 | } else | |
1614 | qc->err_mask |= tmp; | |
1615 | } | |
022bdb07 TH |
1616 | } |
1617 | ||
1618 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) | |
cf480626 | 1619 | action |= ATA_EH_RESET; |
022bdb07 TH |
1620 | |
1621 | return action; | |
1622 | } | |
1623 | ||
76326ac1 TH |
1624 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1625 | int *xfer_ok) | |
022bdb07 | 1626 | { |
76326ac1 TH |
1627 | int base = 0; |
1628 | ||
1629 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1630 | *xfer_ok = 1; | |
1631 | ||
1632 | if (!*xfer_ok) | |
75f9cafc | 1633 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1634 | |
7d47e8d4 | 1635 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1636 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1637 | |
7d47e8d4 | 1638 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1639 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1640 | |
3884f7b0 | 1641 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1642 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1643 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1644 | if ((err_mask & |
1645 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1646 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1647 | } |
1648 | ||
1649 | return 0; | |
1650 | } | |
1651 | ||
7d47e8d4 | 1652 | struct speed_down_verdict_arg { |
022bdb07 | 1653 | u64 since; |
76326ac1 | 1654 | int xfer_ok; |
3884f7b0 | 1655 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1656 | }; |
1657 | ||
7d47e8d4 | 1658 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1659 | { |
7d47e8d4 | 1660 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1661 | int cat; |
022bdb07 TH |
1662 | |
1663 | if (ent->timestamp < arg->since) | |
1664 | return -1; | |
1665 | ||
76326ac1 TH |
1666 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1667 | &arg->xfer_ok); | |
7d47e8d4 | 1668 | arg->nr_errors[cat]++; |
76326ac1 | 1669 | |
022bdb07 TH |
1670 | return 0; |
1671 | } | |
1672 | ||
1673 | /** | |
7d47e8d4 | 1674 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1675 | * @dev: Device of interest |
1676 | * | |
1677 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1678 | * whether NCQ needs to be turned off, transfer speed should be |
1679 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1680 | * |
3884f7b0 TH |
1681 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1682 | * | |
1683 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1684 | * IO commands | |
1685 | * | |
1686 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1687 | * | |
76326ac1 TH |
1688 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1689 | * data transfer hasn't been verified. | |
1690 | * | |
3884f7b0 TH |
1691 | * Verdicts are |
1692 | * | |
1693 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1694 | * |
3884f7b0 TH |
1695 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1696 | * to PIO. | |
7d47e8d4 | 1697 | * |
3884f7b0 | 1698 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1699 | * |
3884f7b0 | 1700 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1701 | * taken per error. An action triggered by non-DUBIOUS errors |
1702 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1703 | * This is to expedite speed down decisions right after device is | |
1704 | * initially configured. | |
1705 | * | |
1706 | * The followings are speed down rules. #1 and #2 deal with | |
1707 | * DUBIOUS errors. | |
7d47e8d4 | 1708 | * |
76326ac1 TH |
1709 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1710 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1711 | * | |
1712 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1713 | * occurred during last 5 mins, NCQ_OFF. | |
1714 | * | |
1715 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
3884f7b0 | 1716 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1717 | * |
76326ac1 | 1718 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1719 | * during last 10 mins, NCQ_OFF. |
1720 | * | |
76326ac1 | 1721 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1722 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1723 | * |
022bdb07 TH |
1724 | * LOCKING: |
1725 | * Inherited from caller. | |
1726 | * | |
1727 | * RETURNS: | |
7d47e8d4 | 1728 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1729 | */ |
7d47e8d4 | 1730 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1731 | { |
7d47e8d4 TH |
1732 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1733 | u64 j64 = get_jiffies_64(); | |
1734 | struct speed_down_verdict_arg arg; | |
1735 | unsigned int verdict = 0; | |
022bdb07 | 1736 | |
3884f7b0 | 1737 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1738 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1739 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1740 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1741 | |
76326ac1 TH |
1742 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1743 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1744 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1745 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1746 | ||
1747 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1748 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1749 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1750 | ||
3884f7b0 TH |
1751 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1752 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1753 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1754 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1755 | |
3884f7b0 | 1756 | /* scan past 10 mins of error history */ |
022bdb07 | 1757 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1758 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1759 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1760 | |
3884f7b0 TH |
1761 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1762 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1763 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1764 | ||
1765 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1766 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1767 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1768 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1769 | |
7d47e8d4 | 1770 | return verdict; |
022bdb07 TH |
1771 | } |
1772 | ||
1773 | /** | |
1774 | * ata_eh_speed_down - record error and speed down if necessary | |
1775 | * @dev: Failed device | |
3884f7b0 | 1776 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1777 | * @err_mask: err_mask of the error |
1778 | * | |
1779 | * Record error and examine error history to determine whether | |
1780 | * adjusting transmission speed is necessary. It also sets | |
1781 | * transmission limits appropriately if such adjustment is | |
1782 | * necessary. | |
1783 | * | |
1784 | * LOCKING: | |
1785 | * Kernel thread context (may sleep). | |
1786 | * | |
1787 | * RETURNS: | |
7d47e8d4 | 1788 | * Determined recovery action. |
022bdb07 | 1789 | */ |
3884f7b0 TH |
1790 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1791 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1792 | { |
b1c72916 | 1793 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 1794 | int xfer_ok = 0; |
7d47e8d4 TH |
1795 | unsigned int verdict; |
1796 | unsigned int action = 0; | |
1797 | ||
1798 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1799 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1800 | return 0; |
1801 | ||
1802 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1803 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1804 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1805 | |
7d47e8d4 TH |
1806 | /* turn off NCQ? */ |
1807 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1808 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1809 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1810 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
1811 | ata_dev_printk(dev, KERN_WARNING, | |
1812 | "NCQ disabled due to excessive errors\n"); | |
1813 | goto done; | |
1814 | } | |
022bdb07 | 1815 | |
7d47e8d4 TH |
1816 | /* speed down? */ |
1817 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1818 | /* speed down SATA link speed if possible */ | |
3884f7b0 | 1819 | if (sata_down_spd_limit(link) == 0) { |
cf480626 | 1820 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1821 | goto done; |
1822 | } | |
022bdb07 | 1823 | |
7d47e8d4 TH |
1824 | /* lower transfer mode */ |
1825 | if (dev->spdn_cnt < 2) { | |
1826 | static const int dma_dnxfer_sel[] = | |
1827 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1828 | static const int pio_dnxfer_sel[] = | |
1829 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1830 | int sel; | |
1831 | ||
1832 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1833 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1834 | else | |
1835 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1836 | ||
1837 | dev->spdn_cnt++; | |
1838 | ||
1839 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1840 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1841 | goto done; |
1842 | } | |
1843 | } | |
1844 | } | |
1845 | ||
1846 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1847 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1848 | */ |
1849 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1850 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1851 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1852 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1853 | dev->spdn_cnt = 0; | |
cf480626 | 1854 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1855 | goto done; |
1856 | } | |
1857 | } | |
022bdb07 | 1858 | |
022bdb07 | 1859 | return 0; |
7d47e8d4 TH |
1860 | done: |
1861 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1862 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1863 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1864 | return action; |
022bdb07 TH |
1865 | } |
1866 | ||
1867 | /** | |
9b1e2658 TH |
1868 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1869 | * @link: host link to perform autopsy on | |
022bdb07 | 1870 | * |
0260731f TH |
1871 | * Analyze why @link failed and determine which recovery actions |
1872 | * are needed. This function also sets more detailed AC_ERR_* | |
1873 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1874 | * |
1875 | * LOCKING: | |
1876 | * Kernel thread context (may sleep). | |
1877 | */ | |
9b1e2658 | 1878 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1879 | { |
0260731f | 1880 | struct ata_port *ap = link->ap; |
936fd732 | 1881 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 1882 | struct ata_device *dev; |
3884f7b0 TH |
1883 | unsigned int all_err_mask = 0, eflags = 0; |
1884 | int tag; | |
022bdb07 TH |
1885 | u32 serror; |
1886 | int rc; | |
1887 | ||
1888 | DPRINTK("ENTER\n"); | |
1889 | ||
1cdaf534 TH |
1890 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1891 | return; | |
1892 | ||
022bdb07 | 1893 | /* obtain and analyze SError */ |
936fd732 | 1894 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1895 | if (rc == 0) { |
1896 | ehc->i.serror |= serror; | |
0260731f | 1897 | ata_eh_analyze_serror(link); |
4e57c517 | 1898 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 1899 | /* SError read failed, force reset and probing */ |
b558eddd | 1900 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 1901 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
1902 | ehc->i.err_mask |= AC_ERR_OTHER; |
1903 | } | |
022bdb07 | 1904 | |
e8ee8451 | 1905 | /* analyze NCQ failure */ |
0260731f | 1906 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 1907 | |
022bdb07 TH |
1908 | /* any real error trumps AC_ERR_OTHER */ |
1909 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
1910 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
1911 | ||
1912 | all_err_mask |= ehc->i.err_mask; | |
1913 | ||
1914 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1915 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1916 | ||
b1c72916 TH |
1917 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
1918 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
1919 | continue; |
1920 | ||
1921 | /* inherit upper level err_mask */ | |
1922 | qc->err_mask |= ehc->i.err_mask; | |
1923 | ||
022bdb07 | 1924 | /* analyze TF */ |
4528e4da | 1925 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
1926 | |
1927 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
1928 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
1929 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
1930 | AC_ERR_INVALID); | |
1931 | ||
1932 | /* any real error trumps unknown error */ | |
1933 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1934 | qc->err_mask &= ~AC_ERR_OTHER; | |
1935 | ||
1936 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 1937 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 1938 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 | 1939 | |
03faab78 TH |
1940 | /* determine whether the command is worth retrying */ |
1941 | if (!(qc->err_mask & AC_ERR_INVALID) && | |
1942 | ((qc->flags & ATA_QCFLAG_IO) || qc->err_mask != AC_ERR_DEV)) | |
1943 | qc->flags |= ATA_QCFLAG_RETRY; | |
1944 | ||
022bdb07 | 1945 | /* accumulate error info */ |
4528e4da | 1946 | ehc->i.dev = qc->dev; |
022bdb07 TH |
1947 | all_err_mask |= qc->err_mask; |
1948 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 1949 | eflags |= ATA_EFLAG_IS_IO; |
022bdb07 TH |
1950 | } |
1951 | ||
a20f33ff | 1952 | /* enforce default EH actions */ |
b51e9e5d | 1953 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 1954 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 1955 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
1956 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
1957 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 1958 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 1959 | |
dfcc173d TH |
1960 | /* If we have offending qcs and the associated failed device, |
1961 | * perform per-dev EH action only on the offending device. | |
1962 | */ | |
4528e4da | 1963 | if (ehc->i.dev) { |
4528e4da TH |
1964 | ehc->i.dev_action[ehc->i.dev->devno] |= |
1965 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
1966 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
1967 | } |
1968 | ||
2695e366 TH |
1969 | /* propagate timeout to host link */ |
1970 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
1971 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
1972 | ||
1973 | /* record error and consider speeding down */ | |
dfcc173d | 1974 | dev = ehc->i.dev; |
2695e366 TH |
1975 | if (!dev && ((ata_link_max_devices(link) == 1 && |
1976 | ata_dev_enabled(link->device)))) | |
1977 | dev = link->device; | |
dfcc173d | 1978 | |
76326ac1 TH |
1979 | if (dev) { |
1980 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
1981 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 1982 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 1983 | } |
dfcc173d | 1984 | |
022bdb07 TH |
1985 | DPRINTK("EXIT\n"); |
1986 | } | |
1987 | ||
1988 | /** | |
9b1e2658 TH |
1989 | * ata_eh_autopsy - analyze error and determine recovery action |
1990 | * @ap: host port to perform autopsy on | |
1991 | * | |
1992 | * Analyze all links of @ap and determine why they failed and | |
1993 | * which recovery actions are needed. | |
1994 | * | |
1995 | * LOCKING: | |
1996 | * Kernel thread context (may sleep). | |
1997 | */ | |
fb7fd614 | 1998 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
1999 | { |
2000 | struct ata_link *link; | |
2001 | ||
2695e366 | 2002 | ata_port_for_each_link(link, ap) |
9b1e2658 | 2003 | ata_eh_link_autopsy(link); |
2695e366 | 2004 | |
b1c72916 TH |
2005 | /* Handle the frigging slave link. Autopsy is done similarly |
2006 | * but actions and flags are transferred over to the master | |
2007 | * link and handled from there. | |
2008 | */ | |
2009 | if (ap->slave_link) { | |
2010 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2011 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2012 | ||
848e4c68 TH |
2013 | /* transfer control flags from master to slave */ |
2014 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2015 | ||
2016 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2017 | ata_eh_link_autopsy(ap->slave_link); |
2018 | ||
848e4c68 | 2019 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2020 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2021 | mehc->i.action |= sehc->i.action; | |
2022 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2023 | mehc->i.flags |= sehc->i.flags; | |
2024 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2025 | } | |
2026 | ||
2695e366 TH |
2027 | /* Autopsy of fanout ports can affect host link autopsy. |
2028 | * Perform host link autopsy last. | |
2029 | */ | |
071f44b1 | 2030 | if (sata_pmp_attached(ap)) |
2695e366 | 2031 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2032 | } |
2033 | ||
2034 | /** | |
2035 | * ata_eh_link_report - report error handling to user | |
0260731f | 2036 | * @link: ATA link EH is going on |
022bdb07 TH |
2037 | * |
2038 | * Report EH to user. | |
2039 | * | |
2040 | * LOCKING: | |
2041 | * None. | |
2042 | */ | |
9b1e2658 | 2043 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2044 | { |
0260731f TH |
2045 | struct ata_port *ap = link->ap; |
2046 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2047 | const char *frozen, *desc; |
a1e10f7e | 2048 | char tries_buf[6]; |
022bdb07 TH |
2049 | int tag, nr_failed = 0; |
2050 | ||
94ff3d54 TH |
2051 | if (ehc->i.flags & ATA_EHI_QUIET) |
2052 | return; | |
2053 | ||
022bdb07 TH |
2054 | desc = NULL; |
2055 | if (ehc->i.desc[0] != '\0') | |
2056 | desc = ehc->i.desc; | |
2057 | ||
2058 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2059 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2060 | ||
b1c72916 TH |
2061 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2062 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2063 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2064 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2065 | continue; |
2066 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2067 | continue; | |
2068 | ||
2069 | nr_failed++; | |
2070 | } | |
2071 | ||
2072 | if (!nr_failed && !ehc->i.err_mask) | |
2073 | return; | |
2074 | ||
2075 | frozen = ""; | |
b51e9e5d | 2076 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2077 | frozen = " frozen"; |
2078 | ||
a1e10f7e TH |
2079 | memset(tries_buf, 0, sizeof(tries_buf)); |
2080 | if (ap->eh_tries < ATA_EH_MAX_TRIES) | |
2081 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", | |
2082 | ap->eh_tries); | |
2083 | ||
022bdb07 | 2084 | if (ehc->i.dev) { |
e8ee8451 | 2085 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2086 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2087 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2088 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2089 | if (desc) |
b64bbc39 | 2090 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
022bdb07 | 2091 | } else { |
0260731f | 2092 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2093 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2094 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2095 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2096 | if (desc) |
0260731f | 2097 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
022bdb07 TH |
2098 | } |
2099 | ||
1333e194 | 2100 | if (ehc->i.serror) |
da0e21d3 | 2101 | ata_link_printk(link, KERN_ERR, |
1333e194 RH |
2102 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2103 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2104 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2105 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2106 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2107 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2108 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2109 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2110 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2111 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2112 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2113 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2114 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2115 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2116 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2117 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2118 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2119 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
1333e194 | 2120 | |
022bdb07 TH |
2121 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
2122 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 2123 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2124 | const u8 *cdb = qc->cdb; |
2125 | char data_buf[20] = ""; | |
2126 | char cdb_buf[70] = ""; | |
022bdb07 | 2127 | |
0260731f | 2128 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2129 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2130 | continue; |
2131 | ||
abb6a889 TH |
2132 | if (qc->dma_dir != DMA_NONE) { |
2133 | static const char *dma_str[] = { | |
2134 | [DMA_BIDIRECTIONAL] = "bidi", | |
2135 | [DMA_TO_DEVICE] = "out", | |
2136 | [DMA_FROM_DEVICE] = "in", | |
2137 | }; | |
2138 | static const char *prot_str[] = { | |
2139 | [ATA_PROT_PIO] = "pio", | |
2140 | [ATA_PROT_DMA] = "dma", | |
2141 | [ATA_PROT_NCQ] = "ncq", | |
0dc36888 TH |
2142 | [ATAPI_PROT_PIO] = "pio", |
2143 | [ATAPI_PROT_DMA] = "dma", | |
abb6a889 TH |
2144 | }; |
2145 | ||
2146 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", | |
2147 | prot_str[qc->tf.protocol], qc->nbytes, | |
2148 | dma_str[qc->dma_dir]); | |
2149 | } | |
2150 | ||
e39eec13 | 2151 | if (ata_is_atapi(qc->tf.protocol)) |
abb6a889 TH |
2152 | snprintf(cdb_buf, sizeof(cdb_buf), |
2153 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " | |
2154 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", | |
2155 | cdb[0], cdb[1], cdb[2], cdb[3], | |
2156 | cdb[4], cdb[5], cdb[6], cdb[7], | |
2157 | cdb[8], cdb[9], cdb[10], cdb[11], | |
2158 | cdb[12], cdb[13], cdb[14], cdb[15]); | |
2159 | ||
8a937581 TH |
2160 | ata_dev_printk(qc->dev, KERN_ERR, |
2161 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " | |
abb6a889 | 2162 | "tag %d%s\n %s" |
8a937581 | 2163 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2164 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2165 | cmd->command, cmd->feature, cmd->nsect, |
2166 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2167 | cmd->hob_feature, cmd->hob_nsect, | |
2168 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2169 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2170 | res->command, res->feature, res->nsect, |
2171 | res->lbal, res->lbam, res->lbah, | |
2172 | res->hob_feature, res->hob_nsect, | |
2173 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2174 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2175 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 RH |
2176 | |
2177 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | | |
2dcb407e | 2178 | ATA_ERR)) { |
1333e194 RH |
2179 | if (res->command & ATA_BUSY) |
2180 | ata_dev_printk(qc->dev, KERN_ERR, | |
2dcb407e | 2181 | "status: { Busy }\n"); |
1333e194 RH |
2182 | else |
2183 | ata_dev_printk(qc->dev, KERN_ERR, | |
2184 | "status: { %s%s%s%s}\n", | |
2185 | res->command & ATA_DRDY ? "DRDY " : "", | |
2186 | res->command & ATA_DF ? "DF " : "", | |
2187 | res->command & ATA_DRQ ? "DRQ " : "", | |
2dcb407e | 2188 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2189 | } |
2190 | ||
2191 | if (cmd->command != ATA_CMD_PACKET && | |
2192 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | | |
2193 | ATA_ABORTED))) | |
2194 | ata_dev_printk(qc->dev, KERN_ERR, | |
2195 | "error: { %s%s%s%s}\n", | |
2196 | res->feature & ATA_ICRC ? "ICRC " : "", | |
2197 | res->feature & ATA_UNC ? "UNC " : "", | |
2198 | res->feature & ATA_IDNF ? "IDNF " : "", | |
2dcb407e | 2199 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
022bdb07 TH |
2200 | } |
2201 | } | |
2202 | ||
9b1e2658 TH |
2203 | /** |
2204 | * ata_eh_report - report error handling to user | |
2205 | * @ap: ATA port to report EH about | |
2206 | * | |
2207 | * Report EH to user. | |
2208 | * | |
2209 | * LOCKING: | |
2210 | * None. | |
2211 | */ | |
fb7fd614 | 2212 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2213 | { |
2214 | struct ata_link *link; | |
2215 | ||
2216 | __ata_port_for_each_link(link, ap) | |
2217 | ata_eh_link_report(link); | |
2218 | } | |
2219 | ||
cc0680a5 | 2220 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2221 | unsigned int *classes, unsigned long deadline, |
2222 | bool clear_classes) | |
d87fa38e | 2223 | { |
f58229f8 | 2224 | struct ata_device *dev; |
d87fa38e | 2225 | |
b1c72916 TH |
2226 | if (clear_classes) |
2227 | ata_link_for_each_dev(dev, link) | |
2228 | classes[dev->devno] = ATA_DEV_UNKNOWN; | |
d87fa38e | 2229 | |
f046519f | 2230 | return reset(link, classes, deadline); |
d87fa38e TH |
2231 | } |
2232 | ||
ae791c05 | 2233 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
5dbfc9cb | 2234 | int rc, const unsigned int *classes) |
664faf09 | 2235 | { |
45db2f6c | 2236 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2237 | return 0; |
5dbfc9cb TH |
2238 | if (rc == -EAGAIN) |
2239 | return 1; | |
071f44b1 | 2240 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2241 | return 1; |
664faf09 TH |
2242 | return 0; |
2243 | } | |
2244 | ||
fb7fd614 TH |
2245 | int ata_eh_reset(struct ata_link *link, int classify, |
2246 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2247 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2248 | { |
afaa5c37 | 2249 | struct ata_port *ap = link->ap; |
b1c72916 | 2250 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2251 | struct ata_eh_context *ehc = &link->eh_context; |
b1c72916 | 2252 | struct ata_eh_context *sehc = &slave->eh_context; |
664faf09 | 2253 | unsigned int *classes = ehc->classes; |
416dc9ed | 2254 | unsigned int lflags = link->flags; |
1cdaf534 | 2255 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2256 | int max_tries = 0, try = 0; |
b1c72916 | 2257 | struct ata_link *failed_link; |
f58229f8 | 2258 | struct ata_device *dev; |
416dc9ed | 2259 | unsigned long deadline, now; |
022bdb07 | 2260 | ata_reset_fn_t reset; |
afaa5c37 | 2261 | unsigned long flags; |
416dc9ed | 2262 | u32 sstatus; |
b1c72916 | 2263 | int nr_unknown, rc; |
022bdb07 | 2264 | |
932648b0 TH |
2265 | /* |
2266 | * Prepare to reset | |
2267 | */ | |
d8af0eb6 TH |
2268 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2269 | max_tries++; | |
05944bdf TH |
2270 | if (link->flags & ATA_LFLAG_NO_HRST) |
2271 | hardreset = NULL; | |
2272 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2273 | softreset = NULL; | |
d8af0eb6 | 2274 | |
0a2c0f56 TH |
2275 | now = jiffies; |
2276 | deadline = ata_deadline(ehc->last_reset, ATA_EH_RESET_COOL_DOWN); | |
2277 | if (time_before(now, deadline)) | |
2278 | schedule_timeout_uninterruptible(deadline - now); | |
2279 | ||
afaa5c37 TH |
2280 | spin_lock_irqsave(ap->lock, flags); |
2281 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2282 | spin_unlock_irqrestore(ap->lock, flags); | |
2283 | ||
cf480626 | 2284 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
0a2c0f56 | 2285 | ehc->last_reset = jiffies; |
13abf50d | 2286 | |
cdeab114 TH |
2287 | ata_link_for_each_dev(dev, link) { |
2288 | /* If we issue an SRST then an ATA drive (not ATAPI) | |
2289 | * may change configuration and be in PIO0 timing. If | |
2290 | * we do a hard reset (or are coming from power on) | |
2291 | * this is true for ATA or ATAPI. Until we've set a | |
2292 | * suitable controller mode we should not touch the | |
2293 | * bus as we may be talking too fast. | |
2294 | */ | |
2295 | dev->pio_mode = XFER_PIO_0; | |
2296 | ||
2297 | /* If the controller has a pio mode setup function | |
2298 | * then use it to set the chipset to rights. Don't | |
2299 | * touch the DMA setup as that will be dealt with when | |
2300 | * configuring devices. | |
2301 | */ | |
2302 | if (ap->ops->set_piomode) | |
2303 | ap->ops->set_piomode(ap, dev); | |
2304 | } | |
2305 | ||
cf480626 | 2306 | /* prefer hardreset */ |
932648b0 | 2307 | reset = NULL; |
cf480626 TH |
2308 | ehc->i.action &= ~ATA_EH_RESET; |
2309 | if (hardreset) { | |
2310 | reset = hardreset; | |
a674050e | 2311 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2312 | } else if (softreset) { |
cf480626 | 2313 | reset = softreset; |
a674050e | 2314 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2315 | } |
f5914a46 TH |
2316 | |
2317 | if (prereset) { | |
b1c72916 TH |
2318 | unsigned long deadline = ata_deadline(jiffies, |
2319 | ATA_EH_PRERESET_TIMEOUT); | |
2320 | ||
2321 | if (slave) { | |
2322 | sehc->i.action &= ~ATA_EH_RESET; | |
2323 | sehc->i.action |= ehc->i.action; | |
2324 | } | |
2325 | ||
2326 | rc = prereset(link, deadline); | |
2327 | ||
2328 | /* If present, do prereset on slave link too. Reset | |
2329 | * is skipped iff both master and slave links report | |
2330 | * -ENOENT or clear ATA_EH_RESET. | |
2331 | */ | |
2332 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2333 | int tmp; | |
2334 | ||
2335 | tmp = prereset(slave, deadline); | |
2336 | if (tmp != -ENOENT) | |
2337 | rc = tmp; | |
2338 | ||
2339 | ehc->i.action |= sehc->i.action; | |
2340 | } | |
2341 | ||
f5914a46 | 2342 | if (rc) { |
c961922b | 2343 | if (rc == -ENOENT) { |
cc0680a5 | 2344 | ata_link_printk(link, KERN_DEBUG, |
4aa9ab67 | 2345 | "port disabled. ignoring.\n"); |
cf480626 | 2346 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2347 | |
936fd732 | 2348 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2349 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2350 | |
2351 | rc = 0; | |
c961922b | 2352 | } else |
cc0680a5 | 2353 | ata_link_printk(link, KERN_ERR, |
f5914a46 | 2354 | "prereset failed (errno=%d)\n", rc); |
fccb6ea5 | 2355 | goto out; |
f5914a46 | 2356 | } |
f5914a46 | 2357 | |
932648b0 TH |
2358 | /* prereset() might have cleared ATA_EH_RESET. If so, |
2359 | * bang classes and return. | |
2360 | */ | |
2361 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
2362 | ata_link_for_each_dev(dev, link) | |
2363 | classes[dev->devno] = ATA_DEV_NONE; | |
2364 | rc = 0; | |
2365 | goto out; | |
2366 | } | |
f5914a46 TH |
2367 | } |
2368 | ||
022bdb07 | 2369 | retry: |
932648b0 TH |
2370 | /* |
2371 | * Perform reset | |
2372 | */ | |
0a2c0f56 | 2373 | ehc->last_reset = jiffies; |
dc98c32c TH |
2374 | if (ata_is_host_link(link)) |
2375 | ata_eh_freeze_port(ap); | |
2376 | ||
341c2c95 | 2377 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2378 | |
932648b0 TH |
2379 | if (reset) { |
2380 | if (verbose) | |
2381 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", | |
2382 | reset == softreset ? "soft" : "hard"); | |
2383 | ||
2384 | /* mark that this EH session started with reset */ | |
2385 | if (reset == hardreset) | |
2386 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2387 | else | |
2388 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2389 | |
b1c72916 TH |
2390 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2391 | if (rc && rc != -EAGAIN) { | |
2392 | failed_link = link; | |
5dbfc9cb | 2393 | goto fail; |
b1c72916 TH |
2394 | } |
2395 | ||
2396 | /* hardreset slave link if existent */ | |
2397 | if (slave && reset == hardreset) { | |
2398 | int tmp; | |
2399 | ||
2400 | if (verbose) | |
2401 | ata_link_printk(slave, KERN_INFO, | |
2402 | "hard resetting link\n"); | |
2403 | ||
2404 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2405 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2406 | false); | |
2407 | switch (tmp) { | |
2408 | case -EAGAIN: | |
2409 | rc = -EAGAIN; | |
2410 | case 0: | |
2411 | break; | |
2412 | default: | |
2413 | failed_link = slave; | |
2414 | rc = tmp; | |
2415 | goto fail; | |
2416 | } | |
2417 | } | |
022bdb07 | 2418 | |
b1c72916 | 2419 | /* perform follow-up SRST if necessary */ |
932648b0 | 2420 | if (reset == hardreset && |
5dbfc9cb | 2421 | ata_eh_followup_srst_needed(link, rc, classes)) { |
932648b0 | 2422 | reset = softreset; |
022bdb07 | 2423 | |
932648b0 TH |
2424 | if (!reset) { |
2425 | ata_link_printk(link, KERN_ERR, | |
2426 | "follow-up softreset required " | |
2427 | "but no softreset avaliable\n"); | |
b1c72916 | 2428 | failed_link = link; |
932648b0 TH |
2429 | rc = -EINVAL; |
2430 | goto fail; | |
2431 | } | |
664faf09 | 2432 | |
932648b0 | 2433 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2434 | rc = ata_do_reset(link, reset, classes, deadline, true); |
664faf09 | 2435 | } |
932648b0 TH |
2436 | } else { |
2437 | if (verbose) | |
2438 | ata_link_printk(link, KERN_INFO, "no reset method " | |
2439 | "available, skipping reset\n"); | |
2440 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) | |
2441 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2442 | } |
2443 | ||
932648b0 TH |
2444 | /* |
2445 | * Post-reset processing | |
2446 | */ | |
416dc9ed TH |
2447 | ata_link_for_each_dev(dev, link) { |
2448 | /* After the reset, the device state is PIO 0 and the | |
2449 | * controller state is undefined. Reset also wakes up | |
2450 | * drives from sleeping mode. | |
2451 | */ | |
2452 | dev->pio_mode = XFER_PIO_0; | |
2453 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2454 | |
b1c72916 | 2455 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
416dc9ed | 2456 | continue; |
022bdb07 | 2457 | |
4ccd3329 | 2458 | /* apply class override */ |
416dc9ed TH |
2459 | if (lflags & ATA_LFLAG_ASSUME_ATA) |
2460 | classes[dev->devno] = ATA_DEV_ATA; | |
2461 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2462 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; /* not yet */ | |
022bdb07 TH |
2463 | } |
2464 | ||
416dc9ed TH |
2465 | /* record current link speed */ |
2466 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2467 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2468 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2469 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2470 | |
dc98c32c TH |
2471 | /* thaw the port */ |
2472 | if (ata_is_host_link(link)) | |
2473 | ata_eh_thaw_port(ap); | |
2474 | ||
f046519f TH |
2475 | /* postreset() should clear hardware SError. Although SError |
2476 | * is cleared during link resume, clearing SError here is | |
2477 | * necessary as some PHYs raise hotplug events after SRST. | |
2478 | * This introduces race condition where hotplug occurs between | |
2479 | * reset and here. This race is mediated by cross checking | |
2480 | * link onlineness and classification result later. | |
2481 | */ | |
b1c72916 | 2482 | if (postreset) { |
416dc9ed | 2483 | postreset(link, classes); |
b1c72916 TH |
2484 | if (slave) |
2485 | postreset(slave, classes); | |
2486 | } | |
20952b69 | 2487 | |
f046519f TH |
2488 | /* clear cached SError */ |
2489 | spin_lock_irqsave(link->ap->lock, flags); | |
2490 | link->eh_info.serror = 0; | |
b1c72916 TH |
2491 | if (slave) |
2492 | slave->eh_info.serror = 0; | |
f046519f TH |
2493 | spin_unlock_irqrestore(link->ap->lock, flags); |
2494 | ||
2495 | /* Make sure onlineness and classification result correspond. | |
2496 | * Hotplug could have happened during reset and some | |
2497 | * controllers fail to wait while a drive is spinning up after | |
2498 | * being hotplugged causing misdetection. By cross checking | |
2499 | * link onlineness and classification result, those conditions | |
2500 | * can be reliably detected and retried. | |
2501 | */ | |
b1c72916 | 2502 | nr_unknown = 0; |
f046519f TH |
2503 | ata_link_for_each_dev(dev, link) { |
2504 | /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */ | |
b1c72916 | 2505 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { |
f046519f | 2506 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 TH |
2507 | if (ata_phys_link_online(ata_dev_phys_link(dev))) |
2508 | nr_unknown++; | |
2509 | } | |
f046519f TH |
2510 | } |
2511 | ||
b1c72916 | 2512 | if (classify && nr_unknown) { |
f046519f TH |
2513 | if (try < max_tries) { |
2514 | ata_link_printk(link, KERN_WARNING, "link online but " | |
2515 | "device misclassified, retrying\n"); | |
b1c72916 | 2516 | failed_link = link; |
f046519f TH |
2517 | rc = -EAGAIN; |
2518 | goto fail; | |
2519 | } | |
2520 | ata_link_printk(link, KERN_WARNING, | |
2521 | "link online but device misclassified, " | |
2522 | "device detection might fail\n"); | |
2523 | } | |
2524 | ||
416dc9ed | 2525 | /* reset successful, schedule revalidation */ |
cf480626 | 2526 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2527 | if (slave) |
2528 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
0a2c0f56 | 2529 | ehc->last_reset = jiffies; |
416dc9ed | 2530 | ehc->i.action |= ATA_EH_REVALIDATE; |
ae791c05 | 2531 | |
416dc9ed | 2532 | rc = 0; |
fccb6ea5 TH |
2533 | out: |
2534 | /* clear hotplug flag */ | |
2535 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2536 | if (slave) |
2537 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2538 | |
2539 | spin_lock_irqsave(ap->lock, flags); | |
2540 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2541 | spin_unlock_irqrestore(ap->lock, flags); | |
2542 | ||
022bdb07 | 2543 | return rc; |
416dc9ed TH |
2544 | |
2545 | fail: | |
5958e302 TH |
2546 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2547 | if (!ata_is_host_link(link) && | |
2548 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2549 | rc = -ERESTART; | |
2550 | ||
416dc9ed TH |
2551 | if (rc == -ERESTART || try >= max_tries) |
2552 | goto out; | |
2553 | ||
2554 | now = jiffies; | |
2555 | if (time_before(now, deadline)) { | |
2556 | unsigned long delta = deadline - now; | |
2557 | ||
b1c72916 | 2558 | ata_link_printk(failed_link, KERN_WARNING, |
0a2c0f56 TH |
2559 | "reset failed (errno=%d), retrying in %u secs\n", |
2560 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed TH |
2561 | |
2562 | while (delta) | |
2563 | delta = schedule_timeout_uninterruptible(delta); | |
2564 | } | |
2565 | ||
b1c72916 | 2566 | if (try == max_tries - 1) { |
416dc9ed | 2567 | sata_down_spd_limit(link); |
b1c72916 TH |
2568 | if (slave) |
2569 | sata_down_spd_limit(slave); | |
2570 | } else if (rc == -EPIPE) | |
2571 | sata_down_spd_limit(failed_link); | |
2572 | ||
416dc9ed TH |
2573 | if (hardreset) |
2574 | reset = hardreset; | |
2575 | goto retry; | |
022bdb07 TH |
2576 | } |
2577 | ||
45fabbb7 EO |
2578 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
2579 | { | |
2580 | struct ata_link *link; | |
2581 | struct ata_device *dev; | |
2582 | unsigned long flags; | |
2583 | ||
2584 | /* | |
2585 | * This function can be thought of as an extended version of | |
2586 | * ata_eh_about_to_do() specially crafted to accommodate the | |
2587 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
2588 | * does not leave the do {} while () loop in ata_eh_recover as | |
2589 | * long as the timeout for a park request to *one* device on | |
2590 | * the port has not expired, and since we still want to pick | |
2591 | * up park requests to other devices on the same port or | |
2592 | * timeout updates for the same device, we have to pull | |
2593 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
2594 | * ourselves at the beginning of each pass over the loop. | |
2595 | * | |
2596 | * Additionally, all write accesses to &ap->park_req_pending | |
2597 | * through INIT_COMPLETION() (see below) or complete_all() | |
2598 | * (see ata_scsi_park_store()) are protected by the host lock. | |
2599 | * As a result we have that park_req_pending.done is zero on | |
2600 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
2601 | * *all* devices on port ap have been pulled into the | |
2602 | * respective eh_context structs. If, and only if, | |
2603 | * park_req_pending.done is non-zero by the time we reach | |
2604 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
2605 | * has been scheduled for at least one of the devices on port | |
2606 | * ap and we have to cycle over the do {} while () loop in | |
2607 | * ata_eh_recover() again. | |
2608 | */ | |
2609 | ||
2610 | spin_lock_irqsave(ap->lock, flags); | |
2611 | INIT_COMPLETION(ap->park_req_pending); | |
2612 | ata_port_for_each_link(link, ap) { | |
2613 | ata_link_for_each_dev(dev, link) { | |
2614 | struct ata_eh_info *ehi = &link->eh_info; | |
2615 | ||
2616 | link->eh_context.i.dev_action[dev->devno] |= | |
2617 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
2618 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
2619 | } | |
2620 | } | |
2621 | spin_unlock_irqrestore(ap->lock, flags); | |
2622 | } | |
2623 | ||
2624 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
2625 | { | |
2626 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2627 | struct ata_taskfile tf; | |
2628 | unsigned int err_mask; | |
2629 | ||
2630 | ata_tf_init(dev, &tf); | |
2631 | if (park) { | |
2632 | ehc->unloaded_mask |= 1 << dev->devno; | |
2633 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
2634 | tf.feature = 0x44; | |
2635 | tf.lbal = 0x4c; | |
2636 | tf.lbam = 0x4e; | |
2637 | tf.lbah = 0x55; | |
2638 | } else { | |
2639 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2640 | tf.command = ATA_CMD_CHK_POWER; | |
2641 | } | |
2642 | ||
2643 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
2644 | tf.protocol |= ATA_PROT_NODATA; | |
2645 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
2646 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
2647 | ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); | |
2648 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2649 | } | |
2650 | } | |
2651 | ||
0260731f | 2652 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2653 | struct ata_device **r_failed_dev) |
022bdb07 | 2654 | { |
0260731f TH |
2655 | struct ata_port *ap = link->ap; |
2656 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2657 | struct ata_device *dev; |
8c3c52a8 | 2658 | unsigned int new_mask = 0; |
084fe639 | 2659 | unsigned long flags; |
f58229f8 | 2660 | int rc = 0; |
022bdb07 TH |
2661 | |
2662 | DPRINTK("ENTER\n"); | |
2663 | ||
8c3c52a8 TH |
2664 | /* For PATA drive side cable detection to work, IDENTIFY must |
2665 | * be done backwards such that PDIAG- is released by the slave | |
2666 | * device before the master device is identified. | |
2667 | */ | |
0260731f | 2668 | ata_link_for_each_dev_reverse(dev, link) { |
f58229f8 TH |
2669 | unsigned int action = ata_eh_dev_action(dev); |
2670 | unsigned int readid_flags = 0; | |
022bdb07 | 2671 | |
bff04647 TH |
2672 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2673 | readid_flags |= ATA_READID_POSTRESET; | |
2674 | ||
9666f400 | 2675 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2676 | WARN_ON(dev->class == ATA_DEV_PMP); |
2677 | ||
b1c72916 | 2678 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 2679 | rc = -EIO; |
8c3c52a8 | 2680 | goto err; |
022bdb07 TH |
2681 | } |
2682 | ||
0260731f | 2683 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2684 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2685 | readid_flags); | |
022bdb07 | 2686 | if (rc) |
8c3c52a8 | 2687 | goto err; |
022bdb07 | 2688 | |
0260731f | 2689 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2690 | |
baa1e78a TH |
2691 | /* Configuration may have changed, reconfigure |
2692 | * transfer mode. | |
2693 | */ | |
2694 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2695 | ||
3057ac3c | 2696 | /* schedule the scsi_rescan_device() here */ |
2697 | queue_work(ata_aux_wq, &(ap->scsi_rescan_task)); | |
084fe639 TH |
2698 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2699 | ehc->tries[dev->devno] && | |
2700 | ata_class_enabled(ehc->classes[dev->devno])) { | |
2701 | dev->class = ehc->classes[dev->devno]; | |
2702 | ||
633273a3 TH |
2703 | if (dev->class == ATA_DEV_PMP) |
2704 | rc = sata_pmp_attach(dev); | |
2705 | else | |
2706 | rc = ata_dev_read_id(dev, &dev->class, | |
2707 | readid_flags, dev->id); | |
8c3c52a8 TH |
2708 | switch (rc) { |
2709 | case 0: | |
f58229f8 | 2710 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2711 | break; |
2712 | case -ENOENT: | |
55a8e2c8 TH |
2713 | /* IDENTIFY was issued to non-existent |
2714 | * device. No need to reset. Just | |
2715 | * thaw and kill the device. | |
2716 | */ | |
2717 | ata_eh_thaw_port(ap); | |
084fe639 TH |
2718 | dev->class = ATA_DEV_UNKNOWN; |
2719 | break; | |
8c3c52a8 TH |
2720 | default: |
2721 | dev->class = ATA_DEV_UNKNOWN; | |
2722 | goto err; | |
084fe639 | 2723 | } |
8c3c52a8 TH |
2724 | } |
2725 | } | |
084fe639 | 2726 | |
c1c4e8d5 | 2727 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
2728 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
2729 | if (ap->ops->cable_detect) | |
2730 | ap->cbl = ap->ops->cable_detect(ap); | |
2731 | ata_force_cbl(ap); | |
2732 | } | |
c1c4e8d5 | 2733 | |
8c3c52a8 TH |
2734 | /* Configure new devices forward such that user doesn't see |
2735 | * device detection messages backwards. | |
2736 | */ | |
0260731f | 2737 | ata_link_for_each_dev(dev, link) { |
633273a3 TH |
2738 | if (!(new_mask & (1 << dev->devno)) || |
2739 | dev->class == ATA_DEV_PMP) | |
8c3c52a8 TH |
2740 | continue; |
2741 | ||
2742 | ehc->i.flags |= ATA_EHI_PRINTINFO; | |
2743 | rc = ata_dev_configure(dev); | |
2744 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
2745 | if (rc) | |
2746 | goto err; | |
2747 | ||
2748 | spin_lock_irqsave(ap->lock, flags); | |
2749 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
2750 | spin_unlock_irqrestore(ap->lock, flags); | |
2751 | ||
2752 | /* new device discovered, configure xfermode */ | |
2753 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
2754 | } |
2755 | ||
8c3c52a8 | 2756 | return 0; |
022bdb07 | 2757 | |
8c3c52a8 TH |
2758 | err: |
2759 | *r_failed_dev = dev; | |
2760 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
2761 | return rc; |
2762 | } | |
2763 | ||
6f1d1e3a TH |
2764 | /** |
2765 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2766 | * @link: link on which timings will be programmed | |
2767 | * @r_failed_dev: out paramter for failed device | |
2768 | * | |
2769 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2770 | * ata_set_mode() fails, pointer to the failing device is | |
2771 | * returned in @r_failed_dev. | |
2772 | * | |
2773 | * LOCKING: | |
2774 | * PCI/etc. bus probe sem. | |
2775 | * | |
2776 | * RETURNS: | |
2777 | * 0 on success, negative errno otherwise | |
2778 | */ | |
2779 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
2780 | { | |
2781 | struct ata_port *ap = link->ap; | |
00115e0f TH |
2782 | struct ata_device *dev; |
2783 | int rc; | |
6f1d1e3a | 2784 | |
76326ac1 TH |
2785 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
2786 | ata_link_for_each_dev(dev, link) { | |
2787 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { | |
2788 | struct ata_ering_entry *ent; | |
2789 | ||
2790 | ent = ata_ering_top(&dev->ering); | |
2791 | if (ent) | |
2792 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
2793 | } | |
2794 | } | |
2795 | ||
6f1d1e3a TH |
2796 | /* has private set_mode? */ |
2797 | if (ap->ops->set_mode) | |
00115e0f TH |
2798 | rc = ap->ops->set_mode(link, r_failed_dev); |
2799 | else | |
2800 | rc = ata_do_set_mode(link, r_failed_dev); | |
2801 | ||
2802 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
2803 | ata_link_for_each_dev(dev, link) { | |
2804 | struct ata_eh_context *ehc = &link->eh_context; | |
2805 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
2806 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
2807 | ||
2808 | if (dev->xfer_mode != saved_xfer_mode || | |
2809 | ata_ncq_enabled(dev) != saved_ncq) | |
2810 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
2811 | } | |
2812 | ||
2813 | return rc; | |
6f1d1e3a TH |
2814 | } |
2815 | ||
11fc33da TH |
2816 | /** |
2817 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
2818 | * @dev: ATAPI device to clear UA for | |
2819 | * | |
2820 | * Resets and other operations can make an ATAPI device raise | |
2821 | * UNIT ATTENTION which causes the next operation to fail. This | |
2822 | * function clears UA. | |
2823 | * | |
2824 | * LOCKING: | |
2825 | * EH context (may sleep). | |
2826 | * | |
2827 | * RETURNS: | |
2828 | * 0 on success, -errno on failure. | |
2829 | */ | |
2830 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
2831 | { | |
2832 | int i; | |
2833 | ||
2834 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
2835 | u8 sense_buffer[SCSI_SENSE_BUFFERSIZE]; | |
2836 | u8 sense_key = 0; | |
2837 | unsigned int err_mask; | |
2838 | ||
2839 | err_mask = atapi_eh_tur(dev, &sense_key); | |
2840 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
2841 | ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " | |
2842 | "failed (err_mask=0x%x)\n", err_mask); | |
2843 | return -EIO; | |
2844 | } | |
2845 | ||
2846 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
2847 | return 0; | |
2848 | ||
2849 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
2850 | if (err_mask) { | |
2851 | ata_dev_printk(dev, KERN_WARNING, "failed to clear " | |
2852 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); | |
2853 | return -EIO; | |
2854 | } | |
2855 | } | |
2856 | ||
2857 | ata_dev_printk(dev, KERN_WARNING, | |
2858 | "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); | |
2859 | ||
2860 | return 0; | |
2861 | } | |
2862 | ||
0260731f | 2863 | static int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 2864 | { |
f58229f8 TH |
2865 | struct ata_device *dev; |
2866 | int cnt = 0; | |
022bdb07 | 2867 | |
0260731f | 2868 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2869 | if (ata_dev_enabled(dev)) |
022bdb07 TH |
2870 | cnt++; |
2871 | return cnt; | |
2872 | } | |
2873 | ||
0260731f | 2874 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 2875 | { |
f58229f8 TH |
2876 | struct ata_device *dev; |
2877 | int cnt = 0; | |
084fe639 | 2878 | |
0260731f | 2879 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2880 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
2881 | cnt++; |
2882 | return cnt; | |
2883 | } | |
2884 | ||
0260731f | 2885 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 2886 | { |
672b2d65 | 2887 | struct ata_port *ap = link->ap; |
0260731f | 2888 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 2889 | struct ata_device *dev; |
084fe639 | 2890 | |
f9df58cb TH |
2891 | /* skip disabled links */ |
2892 | if (link->flags & ATA_LFLAG_DISABLED) | |
2893 | return 1; | |
2894 | ||
672b2d65 TH |
2895 | /* thaw frozen port and recover failed devices */ |
2896 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
2897 | return 0; | |
2898 | ||
2899 | /* reset at least once if reset is requested */ | |
2900 | if ((ehc->i.action & ATA_EH_RESET) && | |
2901 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
2902 | return 0; |
2903 | ||
2904 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
0260731f | 2905 | ata_link_for_each_dev(dev, link) { |
084fe639 TH |
2906 | if (dev->class == ATA_DEV_UNKNOWN && |
2907 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
2908 | return 0; | |
2909 | } | |
2910 | ||
2911 | return 1; | |
2912 | } | |
2913 | ||
02c05a27 TH |
2914 | static int ata_eh_schedule_probe(struct ata_device *dev) |
2915 | { | |
2916 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2917 | ||
2918 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
2919 | (ehc->did_probe_mask & (1 << dev->devno))) | |
2920 | return 0; | |
2921 | ||
2922 | ata_eh_detach_dev(dev); | |
2923 | ata_dev_init(dev); | |
2924 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 2925 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
2926 | ehc->saved_xfer_mode[dev->devno] = 0; |
2927 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 TH |
2928 | |
2929 | return 1; | |
2930 | } | |
2931 | ||
9b1e2658 | 2932 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 2933 | { |
9af5c9c9 | 2934 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 TH |
2935 | |
2936 | ehc->tries[dev->devno]--; | |
2937 | ||
2938 | switch (err) { | |
2939 | case -ENODEV: | |
2940 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
2941 | ehc->i.probe_mask |= (1 << dev->devno); | |
2942 | case -EINVAL: | |
2943 | /* give it just one more chance */ | |
2944 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
2945 | case -EIO: | |
4fb4615b | 2946 | if (ehc->tries[dev->devno] == 1 && dev->pio_mode > XFER_PIO_0) { |
fee7ca72 TH |
2947 | /* This is the last chance, better to slow |
2948 | * down than lose it. | |
2949 | */ | |
b1c72916 | 2950 | sata_down_spd_limit(ata_dev_phys_link(dev)); |
fee7ca72 TH |
2951 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2952 | } | |
2953 | } | |
2954 | ||
2955 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
2956 | /* disable device if it has used up all its chances */ | |
2957 | ata_dev_disable(dev); | |
2958 | ||
2959 | /* detach if offline */ | |
b1c72916 | 2960 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
2961 | ata_eh_detach_dev(dev); |
2962 | ||
02c05a27 | 2963 | /* schedule probe if necessary */ |
87fbc5a0 | 2964 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 2965 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
2966 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
2967 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
2968 | } | |
9b1e2658 TH |
2969 | |
2970 | return 1; | |
fee7ca72 | 2971 | } else { |
cf480626 | 2972 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 2973 | return 0; |
fee7ca72 TH |
2974 | } |
2975 | } | |
2976 | ||
022bdb07 TH |
2977 | /** |
2978 | * ata_eh_recover - recover host port after error | |
2979 | * @ap: host port to recover | |
f5914a46 | 2980 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
2981 | * @softreset: softreset method (can be NULL) |
2982 | * @hardreset: hardreset method (can be NULL) | |
2983 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 2984 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
2985 | * |
2986 | * This is the alpha and omega, eum and yang, heart and soul of | |
2987 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
2988 | * recover each link and hotplug requests are recorded in the |
2989 | * link's eh_context. This function executes all the operations | |
2990 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 2991 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
2992 | * |
2993 | * LOCKING: | |
2994 | * Kernel thread context (may sleep). | |
2995 | * | |
2996 | * RETURNS: | |
2997 | * 0 on success, -errno on failure. | |
2998 | */ | |
fb7fd614 TH |
2999 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3000 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3001 | ata_postreset_fn_t postreset, | |
3002 | struct ata_link **r_failed_link) | |
022bdb07 | 3003 | { |
9b1e2658 | 3004 | struct ata_link *link; |
022bdb07 | 3005 | struct ata_device *dev; |
0a2c0f56 | 3006 | int nr_failed_devs; |
dc98c32c | 3007 | int rc; |
45fabbb7 | 3008 | unsigned long flags, deadline; |
022bdb07 TH |
3009 | |
3010 | DPRINTK("ENTER\n"); | |
3011 | ||
3012 | /* prep for recovery */ | |
9b1e2658 TH |
3013 | ata_port_for_each_link(link, ap) { |
3014 | struct ata_eh_context *ehc = &link->eh_context; | |
084fe639 | 3015 | |
f9df58cb TH |
3016 | /* re-enable link? */ |
3017 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3018 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3019 | spin_lock_irqsave(ap->lock, flags); | |
3020 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3021 | spin_unlock_irqrestore(ap->lock, flags); | |
3022 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3023 | } | |
3024 | ||
9b1e2658 | 3025 | ata_link_for_each_dev(dev, link) { |
fd995f70 TH |
3026 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3027 | ehc->tries[dev->devno] = 1; | |
3028 | else | |
3029 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3030 | |
9b1e2658 TH |
3031 | /* collect port action mask recorded in dev actions */ |
3032 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3033 | ~ATA_EH_PERDEV_MASK; | |
3034 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3035 | ||
3036 | /* process hotplug request */ | |
3037 | if (dev->flags & ATA_DFLAG_DETACH) | |
3038 | ata_eh_detach_dev(dev); | |
3039 | ||
02c05a27 TH |
3040 | /* schedule probe if necessary */ |
3041 | if (!ata_dev_enabled(dev)) | |
3042 | ata_eh_schedule_probe(dev); | |
084fe639 | 3043 | } |
022bdb07 TH |
3044 | } |
3045 | ||
3046 | retry: | |
022bdb07 | 3047 | rc = 0; |
9b1e2658 | 3048 | nr_failed_devs = 0; |
022bdb07 | 3049 | |
aeb2ecd6 | 3050 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3051 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3052 | goto out; |
3053 | ||
9b1e2658 TH |
3054 | /* prep for EH */ |
3055 | ata_port_for_each_link(link, ap) { | |
3056 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 3057 | |
9b1e2658 TH |
3058 | /* skip EH if possible. */ |
3059 | if (ata_eh_skip_recovery(link)) | |
3060 | ehc->i.action = 0; | |
3061 | ||
9b1e2658 TH |
3062 | ata_link_for_each_dev(dev, link) |
3063 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; | |
3064 | } | |
084fe639 | 3065 | |
022bdb07 | 3066 | /* reset */ |
dc98c32c TH |
3067 | ata_port_for_each_link(link, ap) { |
3068 | struct ata_eh_context *ehc = &link->eh_context; | |
9b1e2658 | 3069 | |
dc98c32c TH |
3070 | if (!(ehc->i.action & ATA_EH_RESET)) |
3071 | continue; | |
9b1e2658 | 3072 | |
dc98c32c TH |
3073 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3074 | prereset, softreset, hardreset, postreset); | |
3075 | if (rc) { | |
3076 | ata_link_printk(link, KERN_ERR, | |
3077 | "reset failed, giving up\n"); | |
3078 | goto out; | |
022bdb07 | 3079 | } |
022bdb07 TH |
3080 | } |
3081 | ||
45fabbb7 EO |
3082 | do { |
3083 | unsigned long now; | |
3084 | ||
3085 | /* | |
3086 | * clears ATA_EH_PARK in eh_info and resets | |
3087 | * ap->park_req_pending | |
3088 | */ | |
3089 | ata_eh_pull_park_action(ap); | |
3090 | ||
3091 | deadline = jiffies; | |
3092 | ata_port_for_each_link(link, ap) { | |
3093 | ata_link_for_each_dev(dev, link) { | |
3094 | struct ata_eh_context *ehc = &link->eh_context; | |
3095 | unsigned long tmp; | |
3096 | ||
3097 | if (dev->class != ATA_DEV_ATA) | |
3098 | continue; | |
3099 | if (!(ehc->i.dev_action[dev->devno] & | |
3100 | ATA_EH_PARK)) | |
3101 | continue; | |
3102 | tmp = dev->unpark_deadline; | |
3103 | if (time_before(deadline, tmp)) | |
3104 | deadline = tmp; | |
3105 | else if (time_before_eq(tmp, jiffies)) | |
3106 | continue; | |
3107 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3108 | continue; | |
3109 | ||
3110 | ata_eh_park_issue_cmd(dev, 1); | |
3111 | } | |
3112 | } | |
3113 | ||
3114 | now = jiffies; | |
3115 | if (time_before_eq(deadline, now)) | |
3116 | break; | |
3117 | ||
3118 | deadline = wait_for_completion_timeout(&ap->park_req_pending, | |
3119 | deadline - now); | |
3120 | } while (deadline); | |
3121 | ata_port_for_each_link(link, ap) { | |
3122 | ata_link_for_each_dev(dev, link) { | |
3123 | if (!(link->eh_context.unloaded_mask & | |
3124 | (1 << dev->devno))) | |
3125 | continue; | |
3126 | ||
3127 | ata_eh_park_issue_cmd(dev, 0); | |
3128 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3129 | } | |
3130 | } | |
3131 | ||
9b1e2658 TH |
3132 | /* the rest */ |
3133 | ata_port_for_each_link(link, ap) { | |
3134 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 3135 | |
9b1e2658 TH |
3136 | /* revalidate existing devices and attach new ones */ |
3137 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3138 | if (rc) |
022bdb07 | 3139 | goto dev_fail; |
022bdb07 | 3140 | |
633273a3 TH |
3141 | /* if PMP got attached, return, pmp EH will take care of it */ |
3142 | if (link->device->class == ATA_DEV_PMP) { | |
3143 | ehc->i.action = 0; | |
3144 | return 0; | |
3145 | } | |
3146 | ||
9b1e2658 TH |
3147 | /* configure transfer mode if necessary */ |
3148 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3149 | rc = ata_set_mode(link, &dev); | |
3150 | if (rc) | |
3151 | goto dev_fail; | |
3152 | ehc->i.flags &= ~ATA_EHI_SETMODE; | |
3153 | } | |
3154 | ||
11fc33da TH |
3155 | /* If reset has been issued, clear UA to avoid |
3156 | * disrupting the current users of the device. | |
3157 | */ | |
3158 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
3159 | ata_link_for_each_dev(dev, link) { | |
3160 | if (dev->class != ATA_DEV_ATAPI) | |
3161 | continue; | |
3162 | rc = atapi_eh_clear_ua(dev); | |
3163 | if (rc) | |
3164 | goto dev_fail; | |
3165 | } | |
3166 | } | |
3167 | ||
3168 | /* configure link power saving */ | |
3ec25ebd | 3169 | if (ehc->i.action & ATA_EH_LPM) |
ca77329f KCA |
3170 | ata_link_for_each_dev(dev, link) |
3171 | ata_dev_enable_pm(dev, ap->pm_policy); | |
3172 | ||
9b1e2658 TH |
3173 | /* this link is okay now */ |
3174 | ehc->i.flags = 0; | |
3175 | continue; | |
022bdb07 | 3176 | |
2dcb407e | 3177 | dev_fail: |
9b1e2658 | 3178 | nr_failed_devs++; |
0a2c0f56 | 3179 | ata_eh_handle_dev_fail(dev, rc); |
022bdb07 | 3180 | |
b06ce3e5 TH |
3181 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3182 | /* PMP reset requires working host port. | |
3183 | * Can't retry if it's frozen. | |
3184 | */ | |
071f44b1 | 3185 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3186 | goto out; |
9b1e2658 | 3187 | break; |
b06ce3e5 | 3188 | } |
022bdb07 TH |
3189 | } |
3190 | ||
0a2c0f56 | 3191 | if (nr_failed_devs) |
9b1e2658 | 3192 | goto retry; |
022bdb07 | 3193 | |
9b1e2658 TH |
3194 | out: |
3195 | if (rc && r_failed_link) | |
3196 | *r_failed_link = link; | |
3197 | ||
022bdb07 TH |
3198 | DPRINTK("EXIT, rc=%d\n", rc); |
3199 | return rc; | |
3200 | } | |
3201 | ||
3202 | /** | |
3203 | * ata_eh_finish - finish up EH | |
3204 | * @ap: host port to finish EH for | |
3205 | * | |
3206 | * Recovery is complete. Clean up EH states and retry or finish | |
3207 | * failed qcs. | |
3208 | * | |
3209 | * LOCKING: | |
3210 | * None. | |
3211 | */ | |
fb7fd614 | 3212 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
3213 | { |
3214 | int tag; | |
3215 | ||
3216 | /* retry or finish qcs */ | |
3217 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
3218 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
3219 | ||
3220 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
3221 | continue; | |
3222 | ||
3223 | if (qc->err_mask) { | |
3224 | /* FIXME: Once EH migration is complete, | |
3225 | * generate sense data in this function, | |
3226 | * considering both err_mask and tf. | |
3227 | */ | |
03faab78 | 3228 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3229 | ata_eh_qc_retry(qc); |
03faab78 TH |
3230 | else |
3231 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3232 | } else { |
3233 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3234 | ata_eh_qc_complete(qc); | |
3235 | } else { | |
3236 | /* feed zero TF to sense generation */ | |
3237 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3238 | ata_eh_qc_retry(qc); | |
3239 | } | |
3240 | } | |
3241 | } | |
da917d69 TH |
3242 | |
3243 | /* make sure nr_active_links is zero after EH */ | |
3244 | WARN_ON(ap->nr_active_links); | |
3245 | ap->nr_active_links = 0; | |
022bdb07 TH |
3246 | } |
3247 | ||
3248 | /** | |
3249 | * ata_do_eh - do standard error handling | |
3250 | * @ap: host port to handle error for | |
a1efdaba | 3251 | * |
f5914a46 | 3252 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3253 | * @softreset: softreset method (can be NULL) |
3254 | * @hardreset: hardreset method (can be NULL) | |
3255 | * @postreset: postreset method (can be NULL) | |
3256 | * | |
3257 | * Perform standard error handling sequence. | |
3258 | * | |
3259 | * LOCKING: | |
3260 | * Kernel thread context (may sleep). | |
3261 | */ | |
f5914a46 TH |
3262 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3263 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3264 | ata_postreset_fn_t postreset) | |
022bdb07 | 3265 | { |
9b1e2658 TH |
3266 | struct ata_device *dev; |
3267 | int rc; | |
3268 | ||
3269 | ata_eh_autopsy(ap); | |
3270 | ata_eh_report(ap); | |
3271 | ||
3272 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3273 | NULL); | |
3274 | if (rc) { | |
3275 | ata_link_for_each_dev(dev, &ap->link) | |
3276 | ata_dev_disable(dev); | |
3277 | } | |
3278 | ||
022bdb07 TH |
3279 | ata_eh_finish(ap); |
3280 | } | |
500530f6 | 3281 | |
a1efdaba TH |
3282 | /** |
3283 | * ata_std_error_handler - standard error handler | |
3284 | * @ap: host port to handle error for | |
3285 | * | |
3286 | * Standard error handler | |
3287 | * | |
3288 | * LOCKING: | |
3289 | * Kernel thread context (may sleep). | |
3290 | */ | |
3291 | void ata_std_error_handler(struct ata_port *ap) | |
3292 | { | |
3293 | struct ata_port_operations *ops = ap->ops; | |
3294 | ata_reset_fn_t hardreset = ops->hardreset; | |
3295 | ||
57c9efdf TH |
3296 | /* ignore built-in hardreset if SCR access is not available */ |
3297 | if (ata_is_builtin_hardreset(hardreset) && !sata_scr_valid(&ap->link)) | |
a1efdaba TH |
3298 | hardreset = NULL; |
3299 | ||
3300 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
3301 | } | |
3302 | ||
6ffa01d8 | 3303 | #ifdef CONFIG_PM |
500530f6 TH |
3304 | /** |
3305 | * ata_eh_handle_port_suspend - perform port suspend operation | |
3306 | * @ap: port to suspend | |
3307 | * | |
3308 | * Suspend @ap. | |
3309 | * | |
3310 | * LOCKING: | |
3311 | * Kernel thread context (may sleep). | |
3312 | */ | |
3313 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
3314 | { | |
3315 | unsigned long flags; | |
3316 | int rc = 0; | |
3317 | ||
3318 | /* are we suspending? */ | |
3319 | spin_lock_irqsave(ap->lock, flags); | |
3320 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3321 | ap->pm_mesg.event == PM_EVENT_ON) { | |
3322 | spin_unlock_irqrestore(ap->lock, flags); | |
3323 | return; | |
3324 | } | |
3325 | spin_unlock_irqrestore(ap->lock, flags); | |
3326 | ||
3327 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
3328 | ||
64578a3d TH |
3329 | /* tell ACPI we're suspending */ |
3330 | rc = ata_acpi_on_suspend(ap); | |
3331 | if (rc) | |
3332 | goto out; | |
3333 | ||
500530f6 TH |
3334 | /* suspend */ |
3335 | ata_eh_freeze_port(ap); | |
3336 | ||
3337 | if (ap->ops->port_suspend) | |
3338 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
3339 | ||
bd3adca5 | 3340 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
64578a3d | 3341 | out: |
500530f6 TH |
3342 | /* report result */ |
3343 | spin_lock_irqsave(ap->lock, flags); | |
3344 | ||
3345 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
3346 | if (rc == 0) | |
3347 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 3348 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
3349 | ata_port_schedule_eh(ap); |
3350 | ||
3351 | if (ap->pm_result) { | |
3352 | *ap->pm_result = rc; | |
3353 | ap->pm_result = NULL; | |
3354 | } | |
3355 | ||
3356 | spin_unlock_irqrestore(ap->lock, flags); | |
3357 | ||
3358 | return; | |
3359 | } | |
3360 | ||
3361 | /** | |
3362 | * ata_eh_handle_port_resume - perform port resume operation | |
3363 | * @ap: port to resume | |
3364 | * | |
3365 | * Resume @ap. | |
3366 | * | |
500530f6 TH |
3367 | * LOCKING: |
3368 | * Kernel thread context (may sleep). | |
3369 | */ | |
3370 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
3371 | { | |
500530f6 | 3372 | unsigned long flags; |
9666f400 | 3373 | int rc = 0; |
500530f6 TH |
3374 | |
3375 | /* are we resuming? */ | |
3376 | spin_lock_irqsave(ap->lock, flags); | |
3377 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3378 | ap->pm_mesg.event != PM_EVENT_ON) { | |
3379 | spin_unlock_irqrestore(ap->lock, flags); | |
3380 | return; | |
3381 | } | |
3382 | spin_unlock_irqrestore(ap->lock, flags); | |
3383 | ||
9666f400 | 3384 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 3385 | |
bd3adca5 SL |
3386 | ata_acpi_set_state(ap, PMSG_ON); |
3387 | ||
500530f6 TH |
3388 | if (ap->ops->port_resume) |
3389 | rc = ap->ops->port_resume(ap); | |
3390 | ||
6746544c TH |
3391 | /* tell ACPI that we're resuming */ |
3392 | ata_acpi_on_resume(ap); | |
3393 | ||
9666f400 | 3394 | /* report result */ |
500530f6 TH |
3395 | spin_lock_irqsave(ap->lock, flags); |
3396 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
3397 | if (ap->pm_result) { | |
3398 | *ap->pm_result = rc; | |
3399 | ap->pm_result = NULL; | |
3400 | } | |
3401 | spin_unlock_irqrestore(ap->lock, flags); | |
3402 | } | |
6ffa01d8 | 3403 | #endif /* CONFIG_PM */ |