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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> |
2855568b | 36 | #include <linux/pci.h> |
ece1d636 TH |
37 | #include <scsi/scsi.h> |
38 | #include <scsi/scsi_host.h> | |
39 | #include <scsi/scsi_eh.h> | |
40 | #include <scsi/scsi_device.h> | |
41 | #include <scsi/scsi_cmnd.h> | |
c6fd2807 | 42 | #include "../scsi/scsi_transport_api.h" |
ece1d636 TH |
43 | |
44 | #include <linux/libata.h> | |
45 | ||
46 | #include "libata.h" | |
47 | ||
7d47e8d4 | 48 | enum { |
3884f7b0 | 49 | /* speed down verdicts */ |
7d47e8d4 TH |
50 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
51 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
52 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 53 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
54 | |
55 | /* error flags */ | |
56 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 57 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
3884f7b0 TH |
58 | |
59 | /* error categories */ | |
60 | ATA_ECAT_NONE = 0, | |
61 | ATA_ECAT_ATA_BUS = 1, | |
62 | ATA_ECAT_TOUT_HSM = 2, | |
63 | ATA_ECAT_UNK_DEV = 3, | |
76326ac1 TH |
64 | ATA_ECAT_DUBIOUS_ATA_BUS = 4, |
65 | ATA_ECAT_DUBIOUS_TOUT_HSM = 5, | |
66 | ATA_ECAT_DUBIOUS_UNK_DEV = 6, | |
67 | ATA_ECAT_NR = 7, | |
68 | ||
69 | ATA_ECAT_DUBIOUS_BASE = ATA_ECAT_DUBIOUS_ATA_BUS, | |
7d47e8d4 TH |
70 | }; |
71 | ||
31daabda TH |
72 | /* Waiting in ->prereset can never be reliable. It's sometimes nice |
73 | * to wait there but it can't be depended upon; otherwise, we wouldn't | |
74 | * be resetting. Just give it enough time for most drives to spin up. | |
75 | */ | |
76 | enum { | |
77 | ATA_EH_PRERESET_TIMEOUT = 10 * HZ, | |
5ddf24c5 | 78 | ATA_EH_FASTDRAIN_INTERVAL = 3 * HZ, |
31daabda TH |
79 | }; |
80 | ||
81 | /* The following table determines how we sequence resets. Each entry | |
82 | * represents timeout for that try. The first try can be soft or | |
83 | * hardreset. All others are hardreset if available. In most cases | |
84 | * the first reset w/ 10sec timeout should succeed. Following entries | |
85 | * are mostly for error handling, hotplug and retarded devices. | |
86 | */ | |
87 | static const unsigned long ata_eh_reset_timeouts[] = { | |
88 | 10 * HZ, /* most drives spin up by 10sec */ | |
89 | 10 * HZ, /* > 99% working drives spin up before 20sec */ | |
90 | 35 * HZ, /* give > 30 secs of idleness for retarded devices */ | |
91 | 5 * HZ, /* and sweet one last chance */ | |
92 | /* > 1 min has elapsed, give up */ | |
93 | }; | |
94 | ||
ad9e2762 | 95 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 96 | #ifdef CONFIG_PM |
500530f6 TH |
97 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
98 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
99 | #else /* CONFIG_PM */ |
100 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
101 | { } | |
102 | ||
103 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
104 | { } | |
6ffa01d8 | 105 | #endif /* CONFIG_PM */ |
ad9e2762 | 106 | |
b64bbc39 TH |
107 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
108 | va_list args) | |
109 | { | |
110 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
111 | ATA_EH_DESC_LEN - ehi->desc_len, | |
112 | fmt, args); | |
113 | } | |
114 | ||
115 | /** | |
116 | * __ata_ehi_push_desc - push error description without adding separator | |
117 | * @ehi: target EHI | |
118 | * @fmt: printf format string | |
119 | * | |
120 | * Format string according to @fmt and append it to @ehi->desc. | |
121 | * | |
122 | * LOCKING: | |
123 | * spin_lock_irqsave(host lock) | |
124 | */ | |
125 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
126 | { | |
127 | va_list args; | |
128 | ||
129 | va_start(args, fmt); | |
130 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
131 | va_end(args); | |
132 | } | |
133 | ||
134 | /** | |
135 | * ata_ehi_push_desc - push error description with separator | |
136 | * @ehi: target EHI | |
137 | * @fmt: printf format string | |
138 | * | |
139 | * Format string according to @fmt and append it to @ehi->desc. | |
140 | * If @ehi->desc is not empty, ", " is added in-between. | |
141 | * | |
142 | * LOCKING: | |
143 | * spin_lock_irqsave(host lock) | |
144 | */ | |
145 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
146 | { | |
147 | va_list args; | |
148 | ||
149 | if (ehi->desc_len) | |
150 | __ata_ehi_push_desc(ehi, ", "); | |
151 | ||
152 | va_start(args, fmt); | |
153 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
154 | va_end(args); | |
155 | } | |
156 | ||
157 | /** | |
158 | * ata_ehi_clear_desc - clean error description | |
159 | * @ehi: target EHI | |
160 | * | |
161 | * Clear @ehi->desc. | |
162 | * | |
163 | * LOCKING: | |
164 | * spin_lock_irqsave(host lock) | |
165 | */ | |
166 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
167 | { | |
168 | ehi->desc[0] = '\0'; | |
169 | ehi->desc_len = 0; | |
170 | } | |
171 | ||
cbcdd875 TH |
172 | /** |
173 | * ata_port_desc - append port description | |
174 | * @ap: target ATA port | |
175 | * @fmt: printf format string | |
176 | * | |
177 | * Format string according to @fmt and append it to port | |
178 | * description. If port description is not empty, " " is added | |
179 | * in-between. This function is to be used while initializing | |
180 | * ata_host. The description is printed on host registration. | |
181 | * | |
182 | * LOCKING: | |
183 | * None. | |
184 | */ | |
185 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
186 | { | |
187 | va_list args; | |
188 | ||
189 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
190 | ||
191 | if (ap->link.eh_info.desc_len) | |
192 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
193 | ||
194 | va_start(args, fmt); | |
195 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
196 | va_end(args); | |
197 | } | |
198 | ||
199 | #ifdef CONFIG_PCI | |
200 | ||
201 | /** | |
202 | * ata_port_pbar_desc - append PCI BAR description | |
203 | * @ap: target ATA port | |
204 | * @bar: target PCI BAR | |
205 | * @offset: offset into PCI BAR | |
206 | * @name: name of the area | |
207 | * | |
208 | * If @offset is negative, this function formats a string which | |
209 | * contains the name, address, size and type of the BAR and | |
210 | * appends it to the port description. If @offset is zero or | |
211 | * positive, only name and offsetted address is appended. | |
212 | * | |
213 | * LOCKING: | |
214 | * None. | |
215 | */ | |
216 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
217 | const char *name) | |
218 | { | |
219 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
220 | char *type = ""; | |
221 | unsigned long long start, len; | |
222 | ||
223 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
224 | type = "m"; | |
225 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
226 | type = "i"; | |
227 | ||
228 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
229 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
230 | ||
231 | if (offset < 0) | |
232 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
233 | else | |
e6a73ab1 AM |
234 | ata_port_desc(ap, "%s 0x%llx", name, |
235 | start + (unsigned long long)offset); | |
cbcdd875 TH |
236 | } |
237 | ||
238 | #endif /* CONFIG_PCI */ | |
239 | ||
3884f7b0 | 240 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
241 | unsigned int err_mask) |
242 | { | |
243 | struct ata_ering_entry *ent; | |
244 | ||
245 | WARN_ON(!err_mask); | |
246 | ||
247 | ering->cursor++; | |
248 | ering->cursor %= ATA_ERING_SIZE; | |
249 | ||
250 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 251 | ent->eflags = eflags; |
0c247c55 TH |
252 | ent->err_mask = err_mask; |
253 | ent->timestamp = get_jiffies_64(); | |
254 | } | |
255 | ||
76326ac1 TH |
256 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
257 | { | |
258 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
259 | ||
260 | if (ent->err_mask) | |
261 | return ent; | |
262 | return NULL; | |
263 | } | |
264 | ||
7d47e8d4 | 265 | static void ata_ering_clear(struct ata_ering *ering) |
0c247c55 | 266 | { |
7d47e8d4 | 267 | memset(ering, 0, sizeof(*ering)); |
0c247c55 TH |
268 | } |
269 | ||
270 | static int ata_ering_map(struct ata_ering *ering, | |
271 | int (*map_fn)(struct ata_ering_entry *, void *), | |
272 | void *arg) | |
273 | { | |
274 | int idx, rc = 0; | |
275 | struct ata_ering_entry *ent; | |
276 | ||
277 | idx = ering->cursor; | |
278 | do { | |
279 | ent = &ering->ring[idx]; | |
280 | if (!ent->err_mask) | |
281 | break; | |
282 | rc = map_fn(ent, arg); | |
283 | if (rc) | |
284 | break; | |
285 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
286 | } while (idx != ering->cursor); | |
287 | ||
288 | return rc; | |
289 | } | |
290 | ||
64f65ca6 TH |
291 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
292 | { | |
9af5c9c9 | 293 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
294 | |
295 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
296 | } | |
297 | ||
f58229f8 | 298 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
299 | struct ata_eh_info *ehi, unsigned int action) |
300 | { | |
f58229f8 | 301 | struct ata_device *tdev; |
af181c2d TH |
302 | |
303 | if (!dev) { | |
304 | ehi->action &= ~action; | |
f58229f8 TH |
305 | ata_link_for_each_dev(tdev, link) |
306 | ehi->dev_action[tdev->devno] &= ~action; | |
af181c2d TH |
307 | } else { |
308 | /* doesn't make sense for port-wide EH actions */ | |
309 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
310 | ||
311 | /* break ehi->action into ehi->dev_action */ | |
312 | if (ehi->action & action) { | |
f58229f8 TH |
313 | ata_link_for_each_dev(tdev, link) |
314 | ehi->dev_action[tdev->devno] |= | |
315 | ehi->action & action; | |
af181c2d TH |
316 | ehi->action &= ~action; |
317 | } | |
318 | ||
319 | /* turn off the specified per-dev action */ | |
320 | ehi->dev_action[dev->devno] &= ~action; | |
321 | } | |
322 | } | |
323 | ||
ece1d636 TH |
324 | /** |
325 | * ata_scsi_timed_out - SCSI layer time out callback | |
326 | * @cmd: timed out SCSI command | |
327 | * | |
328 | * Handles SCSI layer timeout. We race with normal completion of | |
329 | * the qc for @cmd. If the qc is already gone, we lose and let | |
330 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has | |
331 | * timed out and EH should be invoked. Prevent ata_qc_complete() | |
332 | * from finishing it by setting EH_SCHEDULED and return | |
333 | * EH_NOT_HANDLED. | |
334 | * | |
ad9e2762 TH |
335 | * TODO: kill this function once old EH is gone. |
336 | * | |
ece1d636 TH |
337 | * LOCKING: |
338 | * Called from timer context | |
339 | * | |
340 | * RETURNS: | |
341 | * EH_HANDLED or EH_NOT_HANDLED | |
342 | */ | |
343 | enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) | |
344 | { | |
345 | struct Scsi_Host *host = cmd->device->host; | |
35bb94b1 | 346 | struct ata_port *ap = ata_shost_to_port(host); |
ece1d636 TH |
347 | unsigned long flags; |
348 | struct ata_queued_cmd *qc; | |
ad9e2762 | 349 | enum scsi_eh_timer_return ret; |
ece1d636 TH |
350 | |
351 | DPRINTK("ENTER\n"); | |
352 | ||
ad9e2762 TH |
353 | if (ap->ops->error_handler) { |
354 | ret = EH_NOT_HANDLED; | |
355 | goto out; | |
356 | } | |
357 | ||
358 | ret = EH_HANDLED; | |
ba6a1308 | 359 | spin_lock_irqsave(ap->lock, flags); |
9af5c9c9 | 360 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
ece1d636 TH |
361 | if (qc) { |
362 | WARN_ON(qc->scsicmd != cmd); | |
363 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; | |
364 | qc->err_mask |= AC_ERR_TIMEOUT; | |
365 | ret = EH_NOT_HANDLED; | |
366 | } | |
ba6a1308 | 367 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 368 | |
ad9e2762 | 369 | out: |
ece1d636 TH |
370 | DPRINTK("EXIT, ret=%d\n", ret); |
371 | return ret; | |
372 | } | |
373 | ||
374 | /** | |
375 | * ata_scsi_error - SCSI layer error handler callback | |
376 | * @host: SCSI host on which error occurred | |
377 | * | |
378 | * Handles SCSI-layer-thrown error events. | |
379 | * | |
380 | * LOCKING: | |
381 | * Inherited from SCSI layer (none, can sleep) | |
382 | * | |
383 | * RETURNS: | |
384 | * Zero. | |
385 | */ | |
381544bb | 386 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 387 | { |
35bb94b1 | 388 | struct ata_port *ap = ata_shost_to_port(host); |
a1e10f7e | 389 | int i; |
ad9e2762 | 390 | unsigned long flags; |
ece1d636 TH |
391 | |
392 | DPRINTK("ENTER\n"); | |
393 | ||
ad9e2762 | 394 | /* synchronize with port task */ |
ece1d636 TH |
395 | ata_port_flush_task(ap); |
396 | ||
cca3974e | 397 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
398 | |
399 | /* For new EH, all qcs are finished in one of three ways - | |
400 | * normal completion, error completion, and SCSI timeout. | |
401 | * Both cmpletions can race against SCSI timeout. When normal | |
402 | * completion wins, the qc never reaches EH. When error | |
403 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
404 | * | |
405 | * When SCSI timeout wins, things are a bit more complex. | |
406 | * Normal or error completion can occur after the timeout but | |
407 | * before this point. In such cases, both types of | |
408 | * completions are honored. A scmd is determined to have | |
409 | * timed out iff its associated qc is active and not failed. | |
410 | */ | |
411 | if (ap->ops->error_handler) { | |
412 | struct scsi_cmnd *scmd, *tmp; | |
413 | int nr_timedout = 0; | |
414 | ||
e30349d2 | 415 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 TH |
416 | |
417 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { | |
418 | struct ata_queued_cmd *qc; | |
419 | ||
420 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
421 | qc = __ata_qc_from_tag(ap, i); | |
422 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
423 | qc->scsicmd == scmd) | |
424 | break; | |
425 | } | |
426 | ||
427 | if (i < ATA_MAX_QUEUE) { | |
428 | /* the scmd has an associated qc */ | |
429 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
430 | /* which hasn't failed yet, timeout */ | |
431 | qc->err_mask |= AC_ERR_TIMEOUT; | |
432 | qc->flags |= ATA_QCFLAG_FAILED; | |
433 | nr_timedout++; | |
434 | } | |
435 | } else { | |
436 | /* Normal completion occurred after | |
437 | * SCSI timeout but before this point. | |
438 | * Successfully complete it. | |
439 | */ | |
440 | scmd->retries = scmd->allowed; | |
441 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
442 | } | |
443 | } | |
444 | ||
445 | /* If we have timed out qcs. They belong to EH from | |
446 | * this point but the state of the controller is | |
447 | * unknown. Freeze the port to make sure the IRQ | |
448 | * handler doesn't diddle with those qcs. This must | |
449 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
450 | */ | |
451 | if (nr_timedout) | |
452 | __ata_port_freeze(ap); | |
453 | ||
e30349d2 | 454 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
455 | |
456 | /* initialize eh_tries */ | |
457 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 458 | } else |
e30349d2 | 459 | spin_unlock_wait(ap->lock); |
ad9e2762 TH |
460 | |
461 | repeat: | |
462 | /* invoke error handler */ | |
463 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
464 | struct ata_link *link; |
465 | ||
5ddf24c5 TH |
466 | /* kill fast drain timer */ |
467 | del_timer_sync(&ap->fastdrain_timer); | |
468 | ||
500530f6 TH |
469 | /* process port resume request */ |
470 | ata_eh_handle_port_resume(ap); | |
471 | ||
f3e81b19 | 472 | /* fetch & clear EH info */ |
e30349d2 | 473 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 474 | |
cf1b86c8 | 475 | __ata_port_for_each_link(link, ap) { |
00115e0f TH |
476 | struct ata_eh_context *ehc = &link->eh_context; |
477 | struct ata_device *dev; | |
478 | ||
cf1b86c8 TH |
479 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
480 | link->eh_context.i = link->eh_info; | |
481 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f TH |
482 | |
483 | ata_link_for_each_dev(dev, link) { | |
484 | int devno = dev->devno; | |
485 | ||
486 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
487 | if (ata_ncq_enabled(dev)) | |
488 | ehc->saved_ncq_enabled |= 1 << devno; | |
489 | } | |
cf1b86c8 | 490 | } |
f3e81b19 | 491 | |
b51e9e5d TH |
492 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
493 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 494 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 495 | |
e30349d2 | 496 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 497 | |
500530f6 TH |
498 | /* invoke EH, skip if unloading or suspended */ |
499 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 TH |
500 | ap->ops->error_handler(ap); |
501 | else | |
502 | ata_eh_finish(ap); | |
ad9e2762 | 503 | |
500530f6 TH |
504 | /* process port suspend request */ |
505 | ata_eh_handle_port_suspend(ap); | |
506 | ||
ad9e2762 TH |
507 | /* Exception might have happend after ->error_handler |
508 | * recovered the port but before this point. Repeat | |
509 | * EH in such case. | |
510 | */ | |
e30349d2 | 511 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 512 | |
b51e9e5d | 513 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 514 | if (--ap->eh_tries) { |
e30349d2 | 515 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
516 | goto repeat; |
517 | } | |
518 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " | |
a1e10f7e | 519 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
914616a3 | 520 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
521 | } |
522 | ||
f3e81b19 | 523 | /* this run is complete, make sure EH info is clear */ |
cf1b86c8 TH |
524 | __ata_port_for_each_link(link, ap) |
525 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
f3e81b19 | 526 | |
e30349d2 | 527 | /* Clear host_eh_scheduled while holding ap->lock such |
ad9e2762 TH |
528 | * that if exception occurs after this point but |
529 | * before EH completion, SCSI midlayer will | |
530 | * re-initiate EH. | |
531 | */ | |
532 | host->host_eh_scheduled = 0; | |
533 | ||
e30349d2 | 534 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 535 | } else { |
9af5c9c9 | 536 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
537 | ap->ops->eng_timeout(ap); |
538 | } | |
ece1d636 | 539 | |
ad9e2762 | 540 | /* finish or retry handled scmd's and clean up */ |
ece1d636 TH |
541 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
542 | ||
543 | scsi_eh_flush_done_q(&ap->eh_done_q); | |
544 | ||
ad9e2762 | 545 | /* clean up */ |
e30349d2 | 546 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 547 | |
1cdaf534 | 548 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 549 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 550 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
52bad64d | 551 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, 0); |
1cdaf534 TH |
552 | |
553 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
554 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); | |
580b2102 | 555 | |
b51e9e5d | 556 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 557 | |
c6cf9e99 | 558 | /* tell wait_eh that we're done */ |
b51e9e5d | 559 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
560 | wake_up_all(&ap->eh_wait_q); |
561 | ||
e30349d2 | 562 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 563 | |
ece1d636 | 564 | DPRINTK("EXIT\n"); |
ece1d636 TH |
565 | } |
566 | ||
c6cf9e99 TH |
567 | /** |
568 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
569 | * @ap: Port to wait EH for | |
570 | * | |
571 | * Wait until the currently pending EH is complete. | |
572 | * | |
573 | * LOCKING: | |
574 | * Kernel thread context (may sleep). | |
575 | */ | |
576 | void ata_port_wait_eh(struct ata_port *ap) | |
577 | { | |
578 | unsigned long flags; | |
579 | DEFINE_WAIT(wait); | |
580 | ||
581 | retry: | |
ba6a1308 | 582 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 583 | |
b51e9e5d | 584 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 585 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 586 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 587 | schedule(); |
ba6a1308 | 588 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 589 | } |
0a1b622e | 590 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 591 | |
ba6a1308 | 592 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
593 | |
594 | /* make sure SCSI EH is complete */ | |
cca3974e | 595 | if (scsi_host_in_recovery(ap->scsi_host)) { |
c6cf9e99 TH |
596 | msleep(10); |
597 | goto retry; | |
598 | } | |
599 | } | |
600 | ||
5ddf24c5 TH |
601 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
602 | { | |
603 | unsigned int tag; | |
604 | int nr = 0; | |
605 | ||
606 | /* count only non-internal commands */ | |
607 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
608 | if (ata_qc_from_tag(ap, tag)) | |
609 | nr++; | |
610 | ||
611 | return nr; | |
612 | } | |
613 | ||
614 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
615 | { | |
616 | struct ata_port *ap = (void *)arg; | |
617 | unsigned long flags; | |
618 | int cnt; | |
619 | ||
620 | spin_lock_irqsave(ap->lock, flags); | |
621 | ||
622 | cnt = ata_eh_nr_in_flight(ap); | |
623 | ||
624 | /* are we done? */ | |
625 | if (!cnt) | |
626 | goto out_unlock; | |
627 | ||
628 | if (cnt == ap->fastdrain_cnt) { | |
629 | unsigned int tag; | |
630 | ||
631 | /* No progress during the last interval, tag all | |
632 | * in-flight qcs as timed out and freeze the port. | |
633 | */ | |
634 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
635 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
636 | if (qc) | |
637 | qc->err_mask |= AC_ERR_TIMEOUT; | |
638 | } | |
639 | ||
640 | ata_port_freeze(ap); | |
641 | } else { | |
642 | /* some qcs have finished, give it another chance */ | |
643 | ap->fastdrain_cnt = cnt; | |
644 | ap->fastdrain_timer.expires = | |
645 | jiffies + ATA_EH_FASTDRAIN_INTERVAL; | |
646 | add_timer(&ap->fastdrain_timer); | |
647 | } | |
648 | ||
649 | out_unlock: | |
650 | spin_unlock_irqrestore(ap->lock, flags); | |
651 | } | |
652 | ||
653 | /** | |
654 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
655 | * @ap: target ATA port | |
656 | * @fastdrain: activate fast drain | |
657 | * | |
658 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
659 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
660 | * that EH kicks in in timely manner. | |
661 | * | |
662 | * LOCKING: | |
663 | * spin_lock_irqsave(host lock) | |
664 | */ | |
665 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
666 | { | |
667 | int cnt; | |
668 | ||
669 | /* already scheduled? */ | |
670 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
671 | return; | |
672 | ||
673 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
674 | ||
675 | if (!fastdrain) | |
676 | return; | |
677 | ||
678 | /* do we have in-flight qcs? */ | |
679 | cnt = ata_eh_nr_in_flight(ap); | |
680 | if (!cnt) | |
681 | return; | |
682 | ||
683 | /* activate fast drain */ | |
684 | ap->fastdrain_cnt = cnt; | |
685 | ap->fastdrain_timer.expires = jiffies + ATA_EH_FASTDRAIN_INTERVAL; | |
686 | add_timer(&ap->fastdrain_timer); | |
687 | } | |
688 | ||
f686bcb8 TH |
689 | /** |
690 | * ata_qc_schedule_eh - schedule qc for error handling | |
691 | * @qc: command to schedule error handling for | |
692 | * | |
693 | * Schedule error handling for @qc. EH will kick in as soon as | |
694 | * other commands are drained. | |
695 | * | |
696 | * LOCKING: | |
cca3974e | 697 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
698 | */ |
699 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
700 | { | |
701 | struct ata_port *ap = qc->ap; | |
702 | ||
703 | WARN_ON(!ap->ops->error_handler); | |
704 | ||
705 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 706 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
707 | |
708 | /* The following will fail if timeout has already expired. | |
709 | * ata_scsi_error() takes care of such scmds on EH entry. | |
710 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
711 | * this function completes. | |
712 | */ | |
713 | scsi_req_abort_cmd(qc->scsicmd); | |
714 | } | |
715 | ||
7b70fc03 TH |
716 | /** |
717 | * ata_port_schedule_eh - schedule error handling without a qc | |
718 | * @ap: ATA port to schedule EH for | |
719 | * | |
720 | * Schedule error handling for @ap. EH will kick in as soon as | |
721 | * all commands are drained. | |
722 | * | |
723 | * LOCKING: | |
cca3974e | 724 | * spin_lock_irqsave(host lock) |
7b70fc03 TH |
725 | */ |
726 | void ata_port_schedule_eh(struct ata_port *ap) | |
727 | { | |
728 | WARN_ON(!ap->ops->error_handler); | |
729 | ||
f4d6d004 TH |
730 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
731 | return; | |
732 | ||
5ddf24c5 | 733 | ata_eh_set_pending(ap, 1); |
cca3974e | 734 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
735 | |
736 | DPRINTK("port EH scheduled\n"); | |
737 | } | |
738 | ||
dbd82616 | 739 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
740 | { |
741 | int tag, nr_aborted = 0; | |
742 | ||
743 | WARN_ON(!ap->ops->error_handler); | |
744 | ||
5ddf24c5 TH |
745 | /* we're gonna abort all commands, no need for fast drain */ |
746 | ata_eh_set_pending(ap, 0); | |
747 | ||
7b70fc03 TH |
748 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
749 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
750 | ||
dbd82616 | 751 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
752 | qc->flags |= ATA_QCFLAG_FAILED; |
753 | ata_qc_complete(qc); | |
754 | nr_aborted++; | |
755 | } | |
756 | } | |
757 | ||
758 | if (!nr_aborted) | |
759 | ata_port_schedule_eh(ap); | |
760 | ||
761 | return nr_aborted; | |
762 | } | |
763 | ||
dbd82616 TH |
764 | /** |
765 | * ata_link_abort - abort all qc's on the link | |
766 | * @link: ATA link to abort qc's for | |
767 | * | |
768 | * Abort all active qc's active on @link and schedule EH. | |
769 | * | |
770 | * LOCKING: | |
771 | * spin_lock_irqsave(host lock) | |
772 | * | |
773 | * RETURNS: | |
774 | * Number of aborted qc's. | |
775 | */ | |
776 | int ata_link_abort(struct ata_link *link) | |
777 | { | |
778 | return ata_do_link_abort(link->ap, link); | |
779 | } | |
780 | ||
781 | /** | |
782 | * ata_port_abort - abort all qc's on the port | |
783 | * @ap: ATA port to abort qc's for | |
784 | * | |
785 | * Abort all active qc's of @ap and schedule EH. | |
786 | * | |
787 | * LOCKING: | |
788 | * spin_lock_irqsave(host_set lock) | |
789 | * | |
790 | * RETURNS: | |
791 | * Number of aborted qc's. | |
792 | */ | |
793 | int ata_port_abort(struct ata_port *ap) | |
794 | { | |
795 | return ata_do_link_abort(ap, NULL); | |
796 | } | |
797 | ||
e3180499 TH |
798 | /** |
799 | * __ata_port_freeze - freeze port | |
800 | * @ap: ATA port to freeze | |
801 | * | |
802 | * This function is called when HSM violation or some other | |
803 | * condition disrupts normal operation of the port. Frozen port | |
804 | * is not allowed to perform any operation until the port is | |
805 | * thawed, which usually follows a successful reset. | |
806 | * | |
807 | * ap->ops->freeze() callback can be used for freezing the port | |
808 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
809 | * port cannot be frozen hardware-wise, the interrupt handler | |
810 | * must ack and clear interrupts unconditionally while the port | |
811 | * is frozen. | |
812 | * | |
813 | * LOCKING: | |
cca3974e | 814 | * spin_lock_irqsave(host lock) |
e3180499 TH |
815 | */ |
816 | static void __ata_port_freeze(struct ata_port *ap) | |
817 | { | |
818 | WARN_ON(!ap->ops->error_handler); | |
819 | ||
820 | if (ap->ops->freeze) | |
821 | ap->ops->freeze(ap); | |
822 | ||
b51e9e5d | 823 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 824 | |
44877b4e | 825 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
826 | } |
827 | ||
828 | /** | |
829 | * ata_port_freeze - abort & freeze port | |
830 | * @ap: ATA port to freeze | |
831 | * | |
832 | * Abort and freeze @ap. | |
833 | * | |
834 | * LOCKING: | |
cca3974e | 835 | * spin_lock_irqsave(host lock) |
e3180499 TH |
836 | * |
837 | * RETURNS: | |
838 | * Number of aborted commands. | |
839 | */ | |
840 | int ata_port_freeze(struct ata_port *ap) | |
841 | { | |
842 | int nr_aborted; | |
843 | ||
844 | WARN_ON(!ap->ops->error_handler); | |
845 | ||
846 | nr_aborted = ata_port_abort(ap); | |
847 | __ata_port_freeze(ap); | |
848 | ||
849 | return nr_aborted; | |
850 | } | |
851 | ||
7d77b247 TH |
852 | /** |
853 | * sata_async_notification - SATA async notification handler | |
854 | * @ap: ATA port where async notification is received | |
855 | * | |
856 | * Handler to be called when async notification via SDB FIS is | |
857 | * received. This function schedules EH if necessary. | |
858 | * | |
859 | * LOCKING: | |
860 | * spin_lock_irqsave(host lock) | |
861 | * | |
862 | * RETURNS: | |
863 | * 1 if EH is scheduled, 0 otherwise. | |
864 | */ | |
865 | int sata_async_notification(struct ata_port *ap) | |
866 | { | |
867 | u32 sntf; | |
868 | int rc; | |
869 | ||
870 | if (!(ap->flags & ATA_FLAG_AN)) | |
871 | return 0; | |
872 | ||
873 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
874 | if (rc == 0) | |
875 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
876 | ||
877 | if (!ap->nr_pmp_links || rc) { | |
878 | /* PMP is not attached or SNTF is not available */ | |
879 | if (!ap->nr_pmp_links) { | |
880 | /* PMP is not attached. Check whether ATAPI | |
881 | * AN is configured. If so, notify media | |
882 | * change. | |
883 | */ | |
884 | struct ata_device *dev = ap->link.device; | |
885 | ||
886 | if ((dev->class == ATA_DEV_ATAPI) && | |
887 | (dev->flags & ATA_DFLAG_AN)) | |
888 | ata_scsi_media_change_notify(dev); | |
889 | return 0; | |
890 | } else { | |
891 | /* PMP is attached but SNTF is not available. | |
892 | * ATAPI async media change notification is | |
893 | * not used. The PMP must be reporting PHY | |
894 | * status change, schedule EH. | |
895 | */ | |
896 | ata_port_schedule_eh(ap); | |
897 | return 1; | |
898 | } | |
899 | } else { | |
900 | /* PMP is attached and SNTF is available */ | |
901 | struct ata_link *link; | |
902 | ||
903 | /* check and notify ATAPI AN */ | |
904 | ata_port_for_each_link(link, ap) { | |
905 | if (!(sntf & (1 << link->pmp))) | |
906 | continue; | |
907 | ||
908 | if ((link->device->class == ATA_DEV_ATAPI) && | |
909 | (link->device->flags & ATA_DFLAG_AN)) | |
910 | ata_scsi_media_change_notify(link->device); | |
911 | } | |
912 | ||
913 | /* If PMP is reporting that PHY status of some | |
914 | * downstream ports has changed, schedule EH. | |
915 | */ | |
916 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
917 | ata_port_schedule_eh(ap); | |
918 | return 1; | |
919 | } | |
920 | ||
921 | return 0; | |
922 | } | |
923 | } | |
924 | ||
e3180499 TH |
925 | /** |
926 | * ata_eh_freeze_port - EH helper to freeze port | |
927 | * @ap: ATA port to freeze | |
928 | * | |
929 | * Freeze @ap. | |
930 | * | |
931 | * LOCKING: | |
932 | * None. | |
933 | */ | |
934 | void ata_eh_freeze_port(struct ata_port *ap) | |
935 | { | |
936 | unsigned long flags; | |
937 | ||
938 | if (!ap->ops->error_handler) | |
939 | return; | |
940 | ||
ba6a1308 | 941 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 942 | __ata_port_freeze(ap); |
ba6a1308 | 943 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
944 | } |
945 | ||
946 | /** | |
947 | * ata_port_thaw_port - EH helper to thaw port | |
948 | * @ap: ATA port to thaw | |
949 | * | |
950 | * Thaw frozen port @ap. | |
951 | * | |
952 | * LOCKING: | |
953 | * None. | |
954 | */ | |
955 | void ata_eh_thaw_port(struct ata_port *ap) | |
956 | { | |
957 | unsigned long flags; | |
958 | ||
959 | if (!ap->ops->error_handler) | |
960 | return; | |
961 | ||
ba6a1308 | 962 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 963 | |
b51e9e5d | 964 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
965 | |
966 | if (ap->ops->thaw) | |
967 | ap->ops->thaw(ap); | |
968 | ||
ba6a1308 | 969 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 970 | |
44877b4e | 971 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
972 | } |
973 | ||
ece1d636 TH |
974 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
975 | { | |
976 | /* nada */ | |
977 | } | |
978 | ||
979 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
980 | { | |
981 | struct ata_port *ap = qc->ap; | |
982 | struct scsi_cmnd *scmd = qc->scsicmd; | |
983 | unsigned long flags; | |
984 | ||
ba6a1308 | 985 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
986 | qc->scsidone = ata_eh_scsidone; |
987 | __ata_qc_complete(qc); | |
988 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 989 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
990 | |
991 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
992 | } | |
993 | ||
994 | /** | |
995 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
996 | * @qc: Command to complete | |
997 | * | |
998 | * Indicate to the mid and upper layers that an ATA command has | |
999 | * completed. To be used from EH. | |
1000 | */ | |
1001 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1002 | { | |
1003 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1004 | scmd->retries = scmd->allowed; | |
1005 | __ata_eh_qc_complete(qc); | |
1006 | } | |
1007 | ||
1008 | /** | |
1009 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1010 | * @qc: Command to retry | |
1011 | * | |
1012 | * Indicate to the mid and upper layers that an ATA command | |
1013 | * should be retried. To be used from EH. | |
1014 | * | |
1015 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
1016 | * scmd->retries is decremented for commands which get retried | |
1017 | * due to unrelated failures (qc->err_mask is zero). | |
1018 | */ | |
1019 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1020 | { | |
1021 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1022 | if (!qc->err_mask && scmd->retries) | |
1023 | scmd->retries--; | |
1024 | __ata_eh_qc_complete(qc); | |
1025 | } | |
022bdb07 | 1026 | |
0ea035a3 TH |
1027 | /** |
1028 | * ata_eh_detach_dev - detach ATA device | |
1029 | * @dev: ATA device to detach | |
1030 | * | |
1031 | * Detach @dev. | |
1032 | * | |
1033 | * LOCKING: | |
1034 | * None. | |
1035 | */ | |
fb7fd614 | 1036 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1037 | { |
f58229f8 TH |
1038 | struct ata_link *link = dev->link; |
1039 | struct ata_port *ap = link->ap; | |
0ea035a3 TH |
1040 | unsigned long flags; |
1041 | ||
1042 | ata_dev_disable(dev); | |
1043 | ||
ba6a1308 | 1044 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1045 | |
1046 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1047 | ||
1048 | if (ata_scsi_offline_dev(dev)) { | |
1049 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1050 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1051 | } |
1052 | ||
beb07c1a | 1053 | /* clear per-dev EH actions */ |
f58229f8 TH |
1054 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1055 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
beb07c1a | 1056 | |
ba6a1308 | 1057 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1058 | } |
1059 | ||
022bdb07 TH |
1060 | /** |
1061 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1062 | * @link: target ATA link |
47005f25 | 1063 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1064 | * @action: action about to be performed |
1065 | * | |
1066 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1067 | * in @link->eh_info such that eh actions are not unnecessarily |
1068 | * repeated. | |
022bdb07 TH |
1069 | * |
1070 | * LOCKING: | |
1071 | * None. | |
1072 | */ | |
fb7fd614 TH |
1073 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1074 | unsigned int action) | |
022bdb07 | 1075 | { |
955e57df TH |
1076 | struct ata_port *ap = link->ap; |
1077 | struct ata_eh_info *ehi = &link->eh_info; | |
1078 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1079 | unsigned long flags; |
1080 | ||
ba6a1308 | 1081 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1082 | |
13abf50d TH |
1083 | /* Reset is represented by combination of actions and EHI |
1084 | * flags. Suck in all related bits before clearing eh_info to | |
1085 | * avoid losing requested action. | |
1086 | */ | |
1087 | if (action & ATA_EH_RESET_MASK) { | |
1088 | ehc->i.action |= ehi->action & ATA_EH_RESET_MASK; | |
1089 | ehc->i.flags |= ehi->flags & ATA_EHI_RESET_MODIFIER_MASK; | |
1090 | ||
1091 | /* make sure all reset actions are cleared & clear EHI flags */ | |
1092 | action |= ATA_EH_RESET_MASK; | |
1093 | ehi->flags &= ~ATA_EHI_RESET_MODIFIER_MASK; | |
1094 | } | |
1095 | ||
955e57df | 1096 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1097 | |
13abf50d | 1098 | if (!(ehc->i.flags & ATA_EHI_QUIET)) |
1cdaf534 TH |
1099 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1100 | ||
ba6a1308 | 1101 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1102 | } |
1103 | ||
47005f25 TH |
1104 | /** |
1105 | * ata_eh_done - EH action complete | |
955e57df | 1106 | * @ap: target ATA port |
47005f25 TH |
1107 | * @dev: target ATA dev for per-dev action (can be NULL) |
1108 | * @action: action just completed | |
1109 | * | |
1110 | * Called right after performing EH actions to clear related bits | |
955e57df | 1111 | * in @link->eh_context. |
47005f25 TH |
1112 | * |
1113 | * LOCKING: | |
1114 | * None. | |
1115 | */ | |
fb7fd614 TH |
1116 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1117 | unsigned int action) | |
47005f25 | 1118 | { |
955e57df | 1119 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1120 | |
13abf50d TH |
1121 | /* if reset is complete, clear all reset actions & reset modifier */ |
1122 | if (action & ATA_EH_RESET_MASK) { | |
1123 | action |= ATA_EH_RESET_MASK; | |
9af5c9c9 | 1124 | ehc->i.flags &= ~ATA_EHI_RESET_MODIFIER_MASK; |
13abf50d TH |
1125 | } |
1126 | ||
955e57df | 1127 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1128 | } |
1129 | ||
022bdb07 TH |
1130 | /** |
1131 | * ata_err_string - convert err_mask to descriptive string | |
1132 | * @err_mask: error mask to convert to string | |
1133 | * | |
1134 | * Convert @err_mask to descriptive string. Errors are | |
1135 | * prioritized according to severity and only the most severe | |
1136 | * error is reported. | |
1137 | * | |
1138 | * LOCKING: | |
1139 | * None. | |
1140 | * | |
1141 | * RETURNS: | |
1142 | * Descriptive string for @err_mask | |
1143 | */ | |
2dcb407e | 1144 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1145 | { |
1146 | if (err_mask & AC_ERR_HOST_BUS) | |
1147 | return "host bus error"; | |
1148 | if (err_mask & AC_ERR_ATA_BUS) | |
1149 | return "ATA bus error"; | |
1150 | if (err_mask & AC_ERR_TIMEOUT) | |
1151 | return "timeout"; | |
1152 | if (err_mask & AC_ERR_HSM) | |
1153 | return "HSM violation"; | |
1154 | if (err_mask & AC_ERR_SYSTEM) | |
1155 | return "internal error"; | |
1156 | if (err_mask & AC_ERR_MEDIA) | |
1157 | return "media error"; | |
1158 | if (err_mask & AC_ERR_INVALID) | |
1159 | return "invalid argument"; | |
1160 | if (err_mask & AC_ERR_DEV) | |
1161 | return "device error"; | |
1162 | return "unknown error"; | |
1163 | } | |
1164 | ||
e8ee8451 TH |
1165 | /** |
1166 | * ata_read_log_page - read a specific log page | |
1167 | * @dev: target device | |
1168 | * @page: page to read | |
1169 | * @buf: buffer to store read page | |
1170 | * @sectors: number of sectors to read | |
1171 | * | |
1172 | * Read log page using READ_LOG_EXT command. | |
1173 | * | |
1174 | * LOCKING: | |
1175 | * Kernel thread context (may sleep). | |
1176 | * | |
1177 | * RETURNS: | |
1178 | * 0 on success, AC_ERR_* mask otherwise. | |
1179 | */ | |
1180 | static unsigned int ata_read_log_page(struct ata_device *dev, | |
1181 | u8 page, void *buf, unsigned int sectors) | |
1182 | { | |
1183 | struct ata_taskfile tf; | |
1184 | unsigned int err_mask; | |
1185 | ||
1186 | DPRINTK("read log page - page %d\n", page); | |
1187 | ||
1188 | ata_tf_init(dev, &tf); | |
1189 | tf.command = ATA_CMD_READ_LOG_EXT; | |
1190 | tf.lbal = page; | |
1191 | tf.nsect = sectors; | |
1192 | tf.hob_nsect = sectors >> 8; | |
1193 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
1194 | tf.protocol = ATA_PROT_PIO; | |
1195 | ||
1196 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1197 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 TH |
1198 | |
1199 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
1200 | return err_mask; | |
1201 | } | |
1202 | ||
1203 | /** | |
1204 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1205 | * @dev: Device to read log page 10h from | |
1206 | * @tag: Resulting tag of the failed command | |
1207 | * @tf: Resulting taskfile registers of the failed command | |
1208 | * | |
1209 | * Read log page 10h to obtain NCQ error details and clear error | |
1210 | * condition. | |
1211 | * | |
1212 | * LOCKING: | |
1213 | * Kernel thread context (may sleep). | |
1214 | * | |
1215 | * RETURNS: | |
1216 | * 0 on success, -errno otherwise. | |
1217 | */ | |
1218 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1219 | int *tag, struct ata_taskfile *tf) | |
1220 | { | |
9af5c9c9 | 1221 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1222 | unsigned int err_mask; |
1223 | u8 csum; | |
1224 | int i; | |
1225 | ||
1226 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); | |
1227 | if (err_mask) | |
1228 | return -EIO; | |
1229 | ||
1230 | csum = 0; | |
1231 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1232 | csum += buf[i]; | |
1233 | if (csum) | |
1234 | ata_dev_printk(dev, KERN_WARNING, | |
1235 | "invalid checksum 0x%x on log page 10h\n", csum); | |
1236 | ||
1237 | if (buf[0] & 0x80) | |
1238 | return -ENOENT; | |
1239 | ||
1240 | *tag = buf[0] & 0x1f; | |
1241 | ||
1242 | tf->command = buf[2]; | |
1243 | tf->feature = buf[3]; | |
1244 | tf->lbal = buf[4]; | |
1245 | tf->lbam = buf[5]; | |
1246 | tf->lbah = buf[6]; | |
1247 | tf->device = buf[7]; | |
1248 | tf->hob_lbal = buf[8]; | |
1249 | tf->hob_lbam = buf[9]; | |
1250 | tf->hob_lbah = buf[10]; | |
1251 | tf->nsect = buf[12]; | |
1252 | tf->hob_nsect = buf[13]; | |
1253 | ||
1254 | return 0; | |
1255 | } | |
1256 | ||
022bdb07 TH |
1257 | /** |
1258 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1259 | * @dev: device to perform REQUEST_SENSE to | |
1260 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
1261 | * | |
1262 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1263 | * SENSE. This function is EH helper. | |
1264 | * | |
1265 | * LOCKING: | |
1266 | * Kernel thread context (may sleep). | |
1267 | * | |
1268 | * RETURNS: | |
1269 | * 0 on success, AC_ERR_* mask on failure | |
1270 | */ | |
56287768 | 1271 | static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc) |
022bdb07 | 1272 | { |
56287768 AL |
1273 | struct ata_device *dev = qc->dev; |
1274 | unsigned char *sense_buf = qc->scsicmd->sense_buffer; | |
9af5c9c9 | 1275 | struct ata_port *ap = dev->link->ap; |
022bdb07 TH |
1276 | struct ata_taskfile tf; |
1277 | u8 cdb[ATAPI_CDB_LEN]; | |
1278 | ||
1279 | DPRINTK("ATAPI request sense\n"); | |
1280 | ||
022bdb07 TH |
1281 | /* FIXME: is this needed? */ |
1282 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
1283 | ||
56287768 AL |
1284 | /* initialize sense_buf with the error register, |
1285 | * for the case where they are -not- overwritten | |
1286 | */ | |
022bdb07 | 1287 | sense_buf[0] = 0x70; |
56287768 AL |
1288 | sense_buf[2] = qc->result_tf.feature >> 4; |
1289 | ||
a617c09f | 1290 | /* some devices time out if garbage left in tf */ |
56287768 | 1291 | ata_tf_init(dev, &tf); |
022bdb07 TH |
1292 | |
1293 | memset(cdb, 0, ATAPI_CDB_LEN); | |
1294 | cdb[0] = REQUEST_SENSE; | |
1295 | cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
1296 | ||
1297 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1298 | tf.command = ATA_CMD_PACKET; | |
1299 | ||
1300 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1301 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
1302 | tf.protocol = ATA_PROT_ATAPI_DMA; | |
1303 | tf.feature |= ATAPI_PKT_DMA; | |
1304 | } else { | |
1305 | tf.protocol = ATA_PROT_ATAPI; | |
f2dfc1a1 TH |
1306 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1307 | tf.lbah = 0; | |
022bdb07 TH |
1308 | } |
1309 | ||
1310 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1311 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1312 | } |
1313 | ||
1314 | /** | |
1315 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1316 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1317 | * |
1318 | * Analyze SError if available and further determine cause of | |
1319 | * failure. | |
1320 | * | |
1321 | * LOCKING: | |
1322 | * None. | |
1323 | */ | |
0260731f | 1324 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1325 | { |
0260731f | 1326 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1327 | u32 serror = ehc->i.serror; |
1328 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1329 | u32 hotplug_mask; |
022bdb07 TH |
1330 | |
1331 | if (serror & SERR_PERSISTENT) { | |
1332 | err_mask |= AC_ERR_ATA_BUS; | |
1333 | action |= ATA_EH_HARDRESET; | |
1334 | } | |
1335 | if (serror & | |
1336 | (SERR_DATA_RECOVERED | SERR_COMM_RECOVERED | SERR_DATA)) { | |
1337 | err_mask |= AC_ERR_ATA_BUS; | |
1338 | action |= ATA_EH_SOFTRESET; | |
1339 | } | |
1340 | if (serror & SERR_PROTOCOL) { | |
1341 | err_mask |= AC_ERR_HSM; | |
1342 | action |= ATA_EH_SOFTRESET; | |
1343 | } | |
1344 | if (serror & SERR_INTERNAL) { | |
1345 | err_mask |= AC_ERR_SYSTEM; | |
771b8dad | 1346 | action |= ATA_EH_HARDRESET; |
022bdb07 | 1347 | } |
f9df58cb TH |
1348 | |
1349 | /* Determine whether a hotplug event has occurred. Both | |
1350 | * SError.N/X are considered hotplug events for enabled or | |
1351 | * host links. For disabled PMP links, only N bit is | |
1352 | * considered as X bit is left at 1 for link plugging. | |
1353 | */ | |
1354 | hotplug_mask = 0; | |
1355 | ||
1356 | if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
1357 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; | |
1358 | else | |
1359 | hotplug_mask = SERR_PHYRDY_CHG; | |
1360 | ||
1361 | if (serror & hotplug_mask) | |
084fe639 | 1362 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1363 | |
1364 | ehc->i.err_mask |= err_mask; | |
1365 | ehc->i.action |= action; | |
1366 | } | |
1367 | ||
e8ee8451 TH |
1368 | /** |
1369 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1370 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1371 | * |
1372 | * Read log page 10h, determine the offending qc and acquire | |
1373 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1374 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1375 | * care of the rest. | |
1376 | * | |
1377 | * LOCKING: | |
1378 | * Kernel thread context (may sleep). | |
1379 | */ | |
0260731f | 1380 | static void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1381 | { |
0260731f TH |
1382 | struct ata_port *ap = link->ap; |
1383 | struct ata_eh_context *ehc = &link->eh_context; | |
1384 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1385 | struct ata_queued_cmd *qc; |
1386 | struct ata_taskfile tf; | |
1387 | int tag, rc; | |
1388 | ||
1389 | /* if frozen, we can't do much */ | |
b51e9e5d | 1390 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1391 | return; |
1392 | ||
1393 | /* is it NCQ device error? */ | |
0260731f | 1394 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1395 | return; |
1396 | ||
1397 | /* has LLDD analyzed already? */ | |
1398 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1399 | qc = __ata_qc_from_tag(ap, tag); | |
1400 | ||
1401 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1402 | continue; | |
1403 | ||
1404 | if (qc->err_mask) | |
1405 | return; | |
1406 | } | |
1407 | ||
1408 | /* okay, this error is ours */ | |
1409 | rc = ata_eh_read_log_10h(dev, &tag, &tf); | |
1410 | if (rc) { | |
0260731f | 1411 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
e8ee8451 TH |
1412 | "(errno=%d)\n", rc); |
1413 | return; | |
1414 | } | |
1415 | ||
0260731f TH |
1416 | if (!(link->sactive & (1 << tag))) { |
1417 | ata_link_printk(link, KERN_ERR, "log page 10h reported " | |
e8ee8451 TH |
1418 | "inactive tag %d\n", tag); |
1419 | return; | |
1420 | } | |
1421 | ||
1422 | /* we've got the perpetrator, condemn it */ | |
1423 | qc = __ata_qc_from_tag(ap, tag); | |
1424 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
5335b729 | 1425 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
e8ee8451 TH |
1426 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1427 | } | |
1428 | ||
022bdb07 TH |
1429 | /** |
1430 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1431 | * @qc: qc to analyze | |
1432 | * @tf: Taskfile registers to analyze | |
1433 | * | |
1434 | * Analyze taskfile of @qc and further determine cause of | |
1435 | * failure. This function also requests ATAPI sense data if | |
1436 | * avaliable. | |
1437 | * | |
1438 | * LOCKING: | |
1439 | * Kernel thread context (may sleep). | |
1440 | * | |
1441 | * RETURNS: | |
1442 | * Determined recovery action | |
1443 | */ | |
1444 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1445 | const struct ata_taskfile *tf) | |
1446 | { | |
1447 | unsigned int tmp, action = 0; | |
1448 | u8 stat = tf->command, err = tf->feature; | |
1449 | ||
1450 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1451 | qc->err_mask |= AC_ERR_HSM; | |
1452 | return ATA_EH_SOFTRESET; | |
1453 | } | |
1454 | ||
a51d644a TH |
1455 | if (stat & (ATA_ERR | ATA_DF)) |
1456 | qc->err_mask |= AC_ERR_DEV; | |
1457 | else | |
022bdb07 TH |
1458 | return 0; |
1459 | ||
1460 | switch (qc->dev->class) { | |
1461 | case ATA_DEV_ATA: | |
1462 | if (err & ATA_ICRC) | |
1463 | qc->err_mask |= AC_ERR_ATA_BUS; | |
1464 | if (err & ATA_UNC) | |
1465 | qc->err_mask |= AC_ERR_MEDIA; | |
1466 | if (err & ATA_IDNF) | |
1467 | qc->err_mask |= AC_ERR_INVALID; | |
1468 | break; | |
1469 | ||
1470 | case ATA_DEV_ATAPI: | |
a569a30d | 1471 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
56287768 | 1472 | tmp = atapi_eh_request_sense(qc); |
a569a30d TH |
1473 | if (!tmp) { |
1474 | /* ATA_QCFLAG_SENSE_VALID is used to | |
1475 | * tell atapi_qc_complete() that sense | |
1476 | * data is already valid. | |
1477 | * | |
1478 | * TODO: interpret sense data and set | |
1479 | * appropriate err_mask. | |
1480 | */ | |
1481 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
1482 | } else | |
1483 | qc->err_mask |= tmp; | |
1484 | } | |
022bdb07 TH |
1485 | } |
1486 | ||
1487 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) | |
1488 | action |= ATA_EH_SOFTRESET; | |
1489 | ||
1490 | return action; | |
1491 | } | |
1492 | ||
76326ac1 TH |
1493 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1494 | int *xfer_ok) | |
022bdb07 | 1495 | { |
76326ac1 TH |
1496 | int base = 0; |
1497 | ||
1498 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1499 | *xfer_ok = 1; | |
1500 | ||
1501 | if (!*xfer_ok) | |
1502 | base = ATA_ECAT_DUBIOUS_BASE; | |
1503 | ||
7d47e8d4 | 1504 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1505 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1506 | |
7d47e8d4 | 1507 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1508 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1509 | |
3884f7b0 | 1510 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1511 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1512 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1513 | if ((err_mask & |
1514 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1515 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1516 | } |
1517 | ||
1518 | return 0; | |
1519 | } | |
1520 | ||
7d47e8d4 | 1521 | struct speed_down_verdict_arg { |
022bdb07 | 1522 | u64 since; |
76326ac1 | 1523 | int xfer_ok; |
3884f7b0 | 1524 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1525 | }; |
1526 | ||
7d47e8d4 | 1527 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1528 | { |
7d47e8d4 | 1529 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1530 | int cat; |
022bdb07 TH |
1531 | |
1532 | if (ent->timestamp < arg->since) | |
1533 | return -1; | |
1534 | ||
76326ac1 TH |
1535 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1536 | &arg->xfer_ok); | |
7d47e8d4 | 1537 | arg->nr_errors[cat]++; |
76326ac1 | 1538 | |
022bdb07 TH |
1539 | return 0; |
1540 | } | |
1541 | ||
1542 | /** | |
7d47e8d4 | 1543 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1544 | * @dev: Device of interest |
1545 | * | |
1546 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1547 | * whether NCQ needs to be turned off, transfer speed should be |
1548 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1549 | * |
3884f7b0 TH |
1550 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1551 | * | |
1552 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1553 | * IO commands | |
1554 | * | |
1555 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1556 | * | |
76326ac1 TH |
1557 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1558 | * data transfer hasn't been verified. | |
1559 | * | |
3884f7b0 TH |
1560 | * Verdicts are |
1561 | * | |
1562 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1563 | * |
3884f7b0 TH |
1564 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1565 | * to PIO. | |
7d47e8d4 | 1566 | * |
3884f7b0 | 1567 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1568 | * |
3884f7b0 | 1569 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1570 | * taken per error. An action triggered by non-DUBIOUS errors |
1571 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1572 | * This is to expedite speed down decisions right after device is | |
1573 | * initially configured. | |
1574 | * | |
1575 | * The followings are speed down rules. #1 and #2 deal with | |
1576 | * DUBIOUS errors. | |
7d47e8d4 | 1577 | * |
76326ac1 TH |
1578 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1579 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1580 | * | |
1581 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1582 | * occurred during last 5 mins, NCQ_OFF. | |
1583 | * | |
1584 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
3884f7b0 | 1585 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1586 | * |
76326ac1 | 1587 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1588 | * during last 10 mins, NCQ_OFF. |
1589 | * | |
76326ac1 | 1590 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1591 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1592 | * |
022bdb07 TH |
1593 | * LOCKING: |
1594 | * Inherited from caller. | |
1595 | * | |
1596 | * RETURNS: | |
7d47e8d4 | 1597 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1598 | */ |
7d47e8d4 | 1599 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1600 | { |
7d47e8d4 TH |
1601 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1602 | u64 j64 = get_jiffies_64(); | |
1603 | struct speed_down_verdict_arg arg; | |
1604 | unsigned int verdict = 0; | |
022bdb07 | 1605 | |
3884f7b0 | 1606 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1607 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1608 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1609 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1610 | |
76326ac1 TH |
1611 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1612 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1613 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1614 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1615 | ||
1616 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1617 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1618 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1619 | ||
3884f7b0 TH |
1620 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1621 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1622 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1623 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1624 | |
3884f7b0 | 1625 | /* scan past 10 mins of error history */ |
022bdb07 | 1626 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1627 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1628 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1629 | |
3884f7b0 TH |
1630 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1631 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1632 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1633 | ||
1634 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1635 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1636 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1637 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1638 | |
7d47e8d4 | 1639 | return verdict; |
022bdb07 TH |
1640 | } |
1641 | ||
1642 | /** | |
1643 | * ata_eh_speed_down - record error and speed down if necessary | |
1644 | * @dev: Failed device | |
3884f7b0 | 1645 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1646 | * @err_mask: err_mask of the error |
1647 | * | |
1648 | * Record error and examine error history to determine whether | |
1649 | * adjusting transmission speed is necessary. It also sets | |
1650 | * transmission limits appropriately if such adjustment is | |
1651 | * necessary. | |
1652 | * | |
1653 | * LOCKING: | |
1654 | * Kernel thread context (may sleep). | |
1655 | * | |
1656 | * RETURNS: | |
7d47e8d4 | 1657 | * Determined recovery action. |
022bdb07 | 1658 | */ |
3884f7b0 TH |
1659 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1660 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1661 | { |
3884f7b0 | 1662 | struct ata_link *link = dev->link; |
76326ac1 | 1663 | int xfer_ok = 0; |
7d47e8d4 TH |
1664 | unsigned int verdict; |
1665 | unsigned int action = 0; | |
1666 | ||
1667 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1668 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1669 | return 0; |
1670 | ||
1671 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1672 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1673 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1674 | |
7d47e8d4 TH |
1675 | /* turn off NCQ? */ |
1676 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1677 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1678 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1679 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
1680 | ata_dev_printk(dev, KERN_WARNING, | |
1681 | "NCQ disabled due to excessive errors\n"); | |
1682 | goto done; | |
1683 | } | |
022bdb07 | 1684 | |
7d47e8d4 TH |
1685 | /* speed down? */ |
1686 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1687 | /* speed down SATA link speed if possible */ | |
3884f7b0 | 1688 | if (sata_down_spd_limit(link) == 0) { |
7d47e8d4 TH |
1689 | action |= ATA_EH_HARDRESET; |
1690 | goto done; | |
1691 | } | |
022bdb07 | 1692 | |
7d47e8d4 TH |
1693 | /* lower transfer mode */ |
1694 | if (dev->spdn_cnt < 2) { | |
1695 | static const int dma_dnxfer_sel[] = | |
1696 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1697 | static const int pio_dnxfer_sel[] = | |
1698 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1699 | int sel; | |
1700 | ||
1701 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1702 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1703 | else | |
1704 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1705 | ||
1706 | dev->spdn_cnt++; | |
1707 | ||
1708 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
1709 | action |= ATA_EH_SOFTRESET; | |
1710 | goto done; | |
1711 | } | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1716 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1717 | */ |
1718 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1719 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1720 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1721 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1722 | dev->spdn_cnt = 0; | |
1723 | action |= ATA_EH_SOFTRESET; | |
1724 | goto done; | |
1725 | } | |
1726 | } | |
022bdb07 | 1727 | |
022bdb07 | 1728 | return 0; |
7d47e8d4 TH |
1729 | done: |
1730 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1731 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1732 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1733 | return action; |
022bdb07 TH |
1734 | } |
1735 | ||
1736 | /** | |
9b1e2658 TH |
1737 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1738 | * @link: host link to perform autopsy on | |
022bdb07 | 1739 | * |
0260731f TH |
1740 | * Analyze why @link failed and determine which recovery actions |
1741 | * are needed. This function also sets more detailed AC_ERR_* | |
1742 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1743 | * |
1744 | * LOCKING: | |
1745 | * Kernel thread context (may sleep). | |
1746 | */ | |
9b1e2658 | 1747 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1748 | { |
0260731f | 1749 | struct ata_port *ap = link->ap; |
936fd732 | 1750 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 1751 | struct ata_device *dev; |
3884f7b0 TH |
1752 | unsigned int all_err_mask = 0, eflags = 0; |
1753 | int tag; | |
022bdb07 TH |
1754 | u32 serror; |
1755 | int rc; | |
1756 | ||
1757 | DPRINTK("ENTER\n"); | |
1758 | ||
1cdaf534 TH |
1759 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1760 | return; | |
1761 | ||
022bdb07 | 1762 | /* obtain and analyze SError */ |
936fd732 | 1763 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1764 | if (rc == 0) { |
1765 | ehc->i.serror |= serror; | |
0260731f | 1766 | ata_eh_analyze_serror(link); |
4e57c517 TH |
1767 | } else if (rc != -EOPNOTSUPP) { |
1768 | /* SError read failed, force hardreset and probing */ | |
1769 | ata_ehi_schedule_probe(&ehc->i); | |
4528e4da | 1770 | ehc->i.action |= ATA_EH_HARDRESET; |
4e57c517 TH |
1771 | ehc->i.err_mask |= AC_ERR_OTHER; |
1772 | } | |
022bdb07 | 1773 | |
e8ee8451 | 1774 | /* analyze NCQ failure */ |
0260731f | 1775 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 1776 | |
022bdb07 TH |
1777 | /* any real error trumps AC_ERR_OTHER */ |
1778 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
1779 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
1780 | ||
1781 | all_err_mask |= ehc->i.err_mask; | |
1782 | ||
1783 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1784 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1785 | ||
0260731f | 1786 | if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link) |
022bdb07 TH |
1787 | continue; |
1788 | ||
1789 | /* inherit upper level err_mask */ | |
1790 | qc->err_mask |= ehc->i.err_mask; | |
1791 | ||
022bdb07 | 1792 | /* analyze TF */ |
4528e4da | 1793 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
1794 | |
1795 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
1796 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
1797 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
1798 | AC_ERR_INVALID); | |
1799 | ||
1800 | /* any real error trumps unknown error */ | |
1801 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1802 | qc->err_mask &= ~AC_ERR_OTHER; | |
1803 | ||
1804 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 1805 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 1806 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 TH |
1807 | |
1808 | /* accumulate error info */ | |
4528e4da | 1809 | ehc->i.dev = qc->dev; |
022bdb07 TH |
1810 | all_err_mask |= qc->err_mask; |
1811 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 1812 | eflags |= ATA_EFLAG_IS_IO; |
022bdb07 TH |
1813 | } |
1814 | ||
a20f33ff | 1815 | /* enforce default EH actions */ |
b51e9e5d | 1816 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 1817 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
4528e4da | 1818 | ehc->i.action |= ATA_EH_SOFTRESET; |
3884f7b0 TH |
1819 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
1820 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 1821 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 1822 | |
dfcc173d TH |
1823 | /* If we have offending qcs and the associated failed device, |
1824 | * perform per-dev EH action only on the offending device. | |
1825 | */ | |
4528e4da | 1826 | if (ehc->i.dev) { |
4528e4da TH |
1827 | ehc->i.dev_action[ehc->i.dev->devno] |= |
1828 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
1829 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
1830 | } |
1831 | ||
2695e366 TH |
1832 | /* propagate timeout to host link */ |
1833 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
1834 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
1835 | ||
1836 | /* record error and consider speeding down */ | |
dfcc173d | 1837 | dev = ehc->i.dev; |
2695e366 TH |
1838 | if (!dev && ((ata_link_max_devices(link) == 1 && |
1839 | ata_dev_enabled(link->device)))) | |
1840 | dev = link->device; | |
dfcc173d | 1841 | |
76326ac1 TH |
1842 | if (dev) { |
1843 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
1844 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 1845 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 1846 | } |
dfcc173d | 1847 | |
022bdb07 TH |
1848 | DPRINTK("EXIT\n"); |
1849 | } | |
1850 | ||
1851 | /** | |
9b1e2658 TH |
1852 | * ata_eh_autopsy - analyze error and determine recovery action |
1853 | * @ap: host port to perform autopsy on | |
1854 | * | |
1855 | * Analyze all links of @ap and determine why they failed and | |
1856 | * which recovery actions are needed. | |
1857 | * | |
1858 | * LOCKING: | |
1859 | * Kernel thread context (may sleep). | |
1860 | */ | |
fb7fd614 | 1861 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
1862 | { |
1863 | struct ata_link *link; | |
1864 | ||
2695e366 | 1865 | ata_port_for_each_link(link, ap) |
9b1e2658 | 1866 | ata_eh_link_autopsy(link); |
2695e366 TH |
1867 | |
1868 | /* Autopsy of fanout ports can affect host link autopsy. | |
1869 | * Perform host link autopsy last. | |
1870 | */ | |
1871 | if (ap->nr_pmp_links) | |
1872 | ata_eh_link_autopsy(&ap->link); | |
9b1e2658 TH |
1873 | } |
1874 | ||
1875 | /** | |
1876 | * ata_eh_link_report - report error handling to user | |
0260731f | 1877 | * @link: ATA link EH is going on |
022bdb07 TH |
1878 | * |
1879 | * Report EH to user. | |
1880 | * | |
1881 | * LOCKING: | |
1882 | * None. | |
1883 | */ | |
9b1e2658 | 1884 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 1885 | { |
0260731f TH |
1886 | struct ata_port *ap = link->ap; |
1887 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 1888 | const char *frozen, *desc; |
a1e10f7e | 1889 | char tries_buf[6]; |
022bdb07 TH |
1890 | int tag, nr_failed = 0; |
1891 | ||
94ff3d54 TH |
1892 | if (ehc->i.flags & ATA_EHI_QUIET) |
1893 | return; | |
1894 | ||
022bdb07 TH |
1895 | desc = NULL; |
1896 | if (ehc->i.desc[0] != '\0') | |
1897 | desc = ehc->i.desc; | |
1898 | ||
1899 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1900 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1901 | ||
e027bd36 TH |
1902 | if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link || |
1903 | ((qc->flags & ATA_QCFLAG_QUIET) && | |
1904 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
1905 | continue; |
1906 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
1907 | continue; | |
1908 | ||
1909 | nr_failed++; | |
1910 | } | |
1911 | ||
1912 | if (!nr_failed && !ehc->i.err_mask) | |
1913 | return; | |
1914 | ||
1915 | frozen = ""; | |
b51e9e5d | 1916 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
1917 | frozen = " frozen"; |
1918 | ||
a1e10f7e TH |
1919 | memset(tries_buf, 0, sizeof(tries_buf)); |
1920 | if (ap->eh_tries < ATA_EH_MAX_TRIES) | |
1921 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", | |
1922 | ap->eh_tries); | |
1923 | ||
022bdb07 | 1924 | if (ehc->i.dev) { |
e8ee8451 | 1925 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
1926 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
1927 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
1928 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 1929 | if (desc) |
b64bbc39 | 1930 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
022bdb07 | 1931 | } else { |
0260731f | 1932 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
1933 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
1934 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
1935 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 1936 | if (desc) |
0260731f | 1937 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
022bdb07 TH |
1938 | } |
1939 | ||
1333e194 RH |
1940 | if (ehc->i.serror) |
1941 | ata_port_printk(ap, KERN_ERR, | |
1942 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", | |
1943 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
1944 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
1945 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
1946 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
1947 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
1948 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
1949 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
1950 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
1951 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
1952 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
1953 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
1954 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
1955 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
1956 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
1957 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
1958 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 1959 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
1333e194 | 1960 | |
022bdb07 TH |
1961 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
1962 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 1963 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
1964 | const u8 *cdb = qc->cdb; |
1965 | char data_buf[20] = ""; | |
1966 | char cdb_buf[70] = ""; | |
022bdb07 | 1967 | |
0260731f TH |
1968 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
1969 | qc->dev->link != link || !qc->err_mask) | |
022bdb07 TH |
1970 | continue; |
1971 | ||
abb6a889 TH |
1972 | if (qc->dma_dir != DMA_NONE) { |
1973 | static const char *dma_str[] = { | |
1974 | [DMA_BIDIRECTIONAL] = "bidi", | |
1975 | [DMA_TO_DEVICE] = "out", | |
1976 | [DMA_FROM_DEVICE] = "in", | |
1977 | }; | |
1978 | static const char *prot_str[] = { | |
1979 | [ATA_PROT_PIO] = "pio", | |
1980 | [ATA_PROT_DMA] = "dma", | |
1981 | [ATA_PROT_NCQ] = "ncq", | |
1982 | [ATA_PROT_ATAPI] = "pio", | |
1983 | [ATA_PROT_ATAPI_DMA] = "dma", | |
1984 | }; | |
1985 | ||
1986 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", | |
1987 | prot_str[qc->tf.protocol], qc->nbytes, | |
1988 | dma_str[qc->dma_dir]); | |
1989 | } | |
1990 | ||
e39eec13 | 1991 | if (ata_is_atapi(qc->tf.protocol)) |
abb6a889 TH |
1992 | snprintf(cdb_buf, sizeof(cdb_buf), |
1993 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " | |
1994 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", | |
1995 | cdb[0], cdb[1], cdb[2], cdb[3], | |
1996 | cdb[4], cdb[5], cdb[6], cdb[7], | |
1997 | cdb[8], cdb[9], cdb[10], cdb[11], | |
1998 | cdb[12], cdb[13], cdb[14], cdb[15]); | |
1999 | ||
8a937581 TH |
2000 | ata_dev_printk(qc->dev, KERN_ERR, |
2001 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " | |
abb6a889 | 2002 | "tag %d%s\n %s" |
8a937581 | 2003 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2004 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2005 | cmd->command, cmd->feature, cmd->nsect, |
2006 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2007 | cmd->hob_feature, cmd->hob_nsect, | |
2008 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2009 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2010 | res->command, res->feature, res->nsect, |
2011 | res->lbal, res->lbam, res->lbah, | |
2012 | res->hob_feature, res->hob_nsect, | |
2013 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2014 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2015 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 RH |
2016 | |
2017 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | | |
2dcb407e | 2018 | ATA_ERR)) { |
1333e194 RH |
2019 | if (res->command & ATA_BUSY) |
2020 | ata_dev_printk(qc->dev, KERN_ERR, | |
2dcb407e | 2021 | "status: { Busy }\n"); |
1333e194 RH |
2022 | else |
2023 | ata_dev_printk(qc->dev, KERN_ERR, | |
2024 | "status: { %s%s%s%s}\n", | |
2025 | res->command & ATA_DRDY ? "DRDY " : "", | |
2026 | res->command & ATA_DF ? "DF " : "", | |
2027 | res->command & ATA_DRQ ? "DRQ " : "", | |
2dcb407e | 2028 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2029 | } |
2030 | ||
2031 | if (cmd->command != ATA_CMD_PACKET && | |
2032 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | | |
2033 | ATA_ABORTED))) | |
2034 | ata_dev_printk(qc->dev, KERN_ERR, | |
2035 | "error: { %s%s%s%s}\n", | |
2036 | res->feature & ATA_ICRC ? "ICRC " : "", | |
2037 | res->feature & ATA_UNC ? "UNC " : "", | |
2038 | res->feature & ATA_IDNF ? "IDNF " : "", | |
2dcb407e | 2039 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
022bdb07 TH |
2040 | } |
2041 | } | |
2042 | ||
9b1e2658 TH |
2043 | /** |
2044 | * ata_eh_report - report error handling to user | |
2045 | * @ap: ATA port to report EH about | |
2046 | * | |
2047 | * Report EH to user. | |
2048 | * | |
2049 | * LOCKING: | |
2050 | * None. | |
2051 | */ | |
fb7fd614 | 2052 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2053 | { |
2054 | struct ata_link *link; | |
2055 | ||
2056 | __ata_port_for_each_link(link, ap) | |
2057 | ata_eh_link_report(link); | |
2058 | } | |
2059 | ||
cc0680a5 | 2060 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
d4b2bab4 | 2061 | unsigned int *classes, unsigned long deadline) |
d87fa38e | 2062 | { |
f58229f8 TH |
2063 | struct ata_device *dev; |
2064 | int rc; | |
d87fa38e | 2065 | |
cc0680a5 | 2066 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2067 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2068 | |
cc0680a5 | 2069 | rc = reset(link, classes, deadline); |
d87fa38e TH |
2070 | if (rc) |
2071 | return rc; | |
2072 | ||
2073 | /* If any class isn't ATA_DEV_UNKNOWN, consider classification | |
2074 | * is complete and convert all ATA_DEV_UNKNOWN to | |
2075 | * ATA_DEV_NONE. | |
2076 | */ | |
cc0680a5 | 2077 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2078 | if (classes[dev->devno] != ATA_DEV_UNKNOWN) |
d87fa38e TH |
2079 | break; |
2080 | ||
f58229f8 | 2081 | if (dev) { |
cc0680a5 | 2082 | ata_link_for_each_dev(dev, link) { |
f58229f8 TH |
2083 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) |
2084 | classes[dev->devno] = ATA_DEV_NONE; | |
2085 | } | |
2086 | } | |
d87fa38e TH |
2087 | |
2088 | return 0; | |
2089 | } | |
2090 | ||
ae791c05 TH |
2091 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
2092 | int rc, int classify, | |
664faf09 TH |
2093 | const unsigned int *classes) |
2094 | { | |
ae791c05 TH |
2095 | if (link->flags & ATA_LFLAG_NO_SRST) |
2096 | return 0; | |
664faf09 TH |
2097 | if (rc == -EAGAIN) |
2098 | return 1; | |
2099 | if (rc != 0) | |
2100 | return 0; | |
3495de73 TH |
2101 | if ((link->ap->flags & ATA_FLAG_PMP) && ata_is_host_link(link)) |
2102 | return 1; | |
ae791c05 TH |
2103 | if (classify && !(link->flags & ATA_LFLAG_ASSUME_CLASS) && |
2104 | classes[0] == ATA_DEV_UNKNOWN) | |
664faf09 TH |
2105 | return 1; |
2106 | return 0; | |
2107 | } | |
2108 | ||
fb7fd614 TH |
2109 | int ata_eh_reset(struct ata_link *link, int classify, |
2110 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2111 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2112 | { |
416dc9ed | 2113 | const int max_tries = ARRAY_SIZE(ata_eh_reset_timeouts); |
afaa5c37 | 2114 | struct ata_port *ap = link->ap; |
936fd732 | 2115 | struct ata_eh_context *ehc = &link->eh_context; |
664faf09 | 2116 | unsigned int *classes = ehc->classes; |
416dc9ed | 2117 | unsigned int lflags = link->flags; |
1cdaf534 | 2118 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
31daabda | 2119 | int try = 0; |
f58229f8 | 2120 | struct ata_device *dev; |
416dc9ed | 2121 | unsigned long deadline, now; |
0e06d9ce | 2122 | unsigned int tmp_action; |
022bdb07 | 2123 | ata_reset_fn_t reset; |
afaa5c37 | 2124 | unsigned long flags; |
416dc9ed | 2125 | u32 sstatus; |
f58229f8 | 2126 | int rc; |
022bdb07 | 2127 | |
13abf50d | 2128 | /* about to reset */ |
afaa5c37 TH |
2129 | spin_lock_irqsave(ap->lock, flags); |
2130 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2131 | spin_unlock_irqrestore(ap->lock, flags); | |
2132 | ||
955e57df | 2133 | ata_eh_about_to_do(link, NULL, ehc->i.action & ATA_EH_RESET_MASK); |
13abf50d | 2134 | |
cdeab114 TH |
2135 | ata_link_for_each_dev(dev, link) { |
2136 | /* If we issue an SRST then an ATA drive (not ATAPI) | |
2137 | * may change configuration and be in PIO0 timing. If | |
2138 | * we do a hard reset (or are coming from power on) | |
2139 | * this is true for ATA or ATAPI. Until we've set a | |
2140 | * suitable controller mode we should not touch the | |
2141 | * bus as we may be talking too fast. | |
2142 | */ | |
2143 | dev->pio_mode = XFER_PIO_0; | |
2144 | ||
2145 | /* If the controller has a pio mode setup function | |
2146 | * then use it to set the chipset to rights. Don't | |
2147 | * touch the DMA setup as that will be dealt with when | |
2148 | * configuring devices. | |
2149 | */ | |
2150 | if (ap->ops->set_piomode) | |
2151 | ap->ops->set_piomode(ap, dev); | |
2152 | } | |
2153 | ||
f5914a46 TH |
2154 | /* Determine which reset to use and record in ehc->i.action. |
2155 | * prereset() may examine and modify it. | |
2156 | */ | |
416dc9ed | 2157 | if (softreset && (!hardreset || (!(lflags & ATA_LFLAG_NO_SRST) && |
ae791c05 | 2158 | !sata_set_spd_needed(link) && |
0e06d9ce TH |
2159 | !(ehc->i.action & ATA_EH_HARDRESET)))) |
2160 | tmp_action = ATA_EH_SOFTRESET; | |
022bdb07 | 2161 | else |
0e06d9ce TH |
2162 | tmp_action = ATA_EH_HARDRESET; |
2163 | ||
2164 | ehc->i.action = (ehc->i.action & ~ATA_EH_RESET_MASK) | tmp_action; | |
f5914a46 TH |
2165 | |
2166 | if (prereset) { | |
cc0680a5 | 2167 | rc = prereset(link, jiffies + ATA_EH_PRERESET_TIMEOUT); |
f5914a46 | 2168 | if (rc) { |
c961922b | 2169 | if (rc == -ENOENT) { |
cc0680a5 | 2170 | ata_link_printk(link, KERN_DEBUG, |
4aa9ab67 | 2171 | "port disabled. ignoring.\n"); |
9af5c9c9 | 2172 | ehc->i.action &= ~ATA_EH_RESET_MASK; |
4aa9ab67 | 2173 | |
936fd732 | 2174 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2175 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2176 | |
2177 | rc = 0; | |
c961922b | 2178 | } else |
cc0680a5 | 2179 | ata_link_printk(link, KERN_ERR, |
f5914a46 | 2180 | "prereset failed (errno=%d)\n", rc); |
fccb6ea5 | 2181 | goto out; |
f5914a46 TH |
2182 | } |
2183 | } | |
2184 | ||
2185 | /* prereset() might have modified ehc->i.action */ | |
2186 | if (ehc->i.action & ATA_EH_HARDRESET) | |
022bdb07 | 2187 | reset = hardreset; |
f5914a46 TH |
2188 | else if (ehc->i.action & ATA_EH_SOFTRESET) |
2189 | reset = softreset; | |
2190 | else { | |
2191 | /* prereset told us not to reset, bang classes and return */ | |
936fd732 | 2192 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2193 | classes[dev->devno] = ATA_DEV_NONE; |
fccb6ea5 TH |
2194 | rc = 0; |
2195 | goto out; | |
f5914a46 TH |
2196 | } |
2197 | ||
2198 | /* did prereset() screw up? if so, fix up to avoid oopsing */ | |
2199 | if (!reset) { | |
f5914a46 TH |
2200 | if (softreset) |
2201 | reset = softreset; | |
2202 | else | |
2203 | reset = hardreset; | |
2204 | } | |
022bdb07 TH |
2205 | |
2206 | retry: | |
31daabda TH |
2207 | deadline = jiffies + ata_eh_reset_timeouts[try++]; |
2208 | ||
3e706399 TH |
2209 | /* shut up during boot probing */ |
2210 | if (verbose) | |
cc0680a5 | 2211 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", |
3e706399 | 2212 | reset == softreset ? "soft" : "hard"); |
022bdb07 | 2213 | |
13abf50d | 2214 | /* mark that this EH session started with reset */ |
0d64a233 TH |
2215 | if (reset == hardreset) |
2216 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2217 | else | |
2218 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2219 | |
cc0680a5 | 2220 | rc = ata_do_reset(link, reset, classes, deadline); |
022bdb07 | 2221 | |
664faf09 | 2222 | if (reset == hardreset && |
ae791c05 | 2223 | ata_eh_followup_srst_needed(link, rc, classify, classes)) { |
664faf09 | 2224 | /* okay, let's do follow-up softreset */ |
664faf09 TH |
2225 | reset = softreset; |
2226 | ||
2227 | if (!reset) { | |
cc0680a5 | 2228 | ata_link_printk(link, KERN_ERR, |
664faf09 TH |
2229 | "follow-up softreset required " |
2230 | "but no softreset avaliable\n"); | |
fccb6ea5 | 2231 | rc = -EINVAL; |
08cf69d0 | 2232 | goto fail; |
664faf09 TH |
2233 | } |
2234 | ||
955e57df | 2235 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET_MASK); |
cc0680a5 | 2236 | rc = ata_do_reset(link, reset, classes, deadline); |
664faf09 TH |
2237 | } |
2238 | ||
416dc9ed TH |
2239 | /* -EAGAIN can happen if we skipped followup SRST */ |
2240 | if (rc && rc != -EAGAIN) | |
2241 | goto fail; | |
664faf09 | 2242 | |
08cf69d0 TH |
2243 | /* was classification successful? */ |
2244 | if (classify && classes[0] == ATA_DEV_UNKNOWN && | |
2245 | !(lflags & ATA_LFLAG_ASSUME_CLASS)) { | |
2246 | if (try < max_tries) { | |
2247 | ata_link_printk(link, KERN_WARNING, | |
2248 | "classification failed\n"); | |
2249 | rc = -EINVAL; | |
2250 | goto fail; | |
2251 | } | |
2252 | ||
2253 | ata_link_printk(link, KERN_WARNING, | |
2254 | "classfication failed, assuming ATA\n"); | |
2255 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
2256 | } | |
2257 | ||
416dc9ed TH |
2258 | ata_link_for_each_dev(dev, link) { |
2259 | /* After the reset, the device state is PIO 0 and the | |
2260 | * controller state is undefined. Reset also wakes up | |
2261 | * drives from sleeping mode. | |
2262 | */ | |
2263 | dev->pio_mode = XFER_PIO_0; | |
2264 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2265 | |
416dc9ed TH |
2266 | if (ata_link_offline(link)) |
2267 | continue; | |
022bdb07 | 2268 | |
4ccd3329 | 2269 | /* apply class override */ |
416dc9ed TH |
2270 | if (lflags & ATA_LFLAG_ASSUME_ATA) |
2271 | classes[dev->devno] = ATA_DEV_ATA; | |
2272 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2273 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; /* not yet */ | |
022bdb07 TH |
2274 | } |
2275 | ||
416dc9ed TH |
2276 | /* record current link speed */ |
2277 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2278 | link->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2279 | |
416dc9ed TH |
2280 | if (postreset) |
2281 | postreset(link, classes); | |
20952b69 | 2282 | |
416dc9ed TH |
2283 | /* reset successful, schedule revalidation */ |
2284 | ata_eh_done(link, NULL, ehc->i.action & ATA_EH_RESET_MASK); | |
2285 | ehc->i.action |= ATA_EH_REVALIDATE; | |
ae791c05 | 2286 | |
416dc9ed | 2287 | rc = 0; |
fccb6ea5 TH |
2288 | out: |
2289 | /* clear hotplug flag */ | |
2290 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2291 | |
2292 | spin_lock_irqsave(ap->lock, flags); | |
2293 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2294 | spin_unlock_irqrestore(ap->lock, flags); | |
2295 | ||
022bdb07 | 2296 | return rc; |
416dc9ed TH |
2297 | |
2298 | fail: | |
2299 | if (rc == -ERESTART || try >= max_tries) | |
2300 | goto out; | |
2301 | ||
2302 | now = jiffies; | |
2303 | if (time_before(now, deadline)) { | |
2304 | unsigned long delta = deadline - now; | |
2305 | ||
2306 | ata_link_printk(link, KERN_WARNING, "reset failed " | |
2307 | "(errno=%d), retrying in %u secs\n", | |
2308 | rc, (jiffies_to_msecs(delta) + 999) / 1000); | |
2309 | ||
2310 | while (delta) | |
2311 | delta = schedule_timeout_uninterruptible(delta); | |
2312 | } | |
2313 | ||
2314 | if (rc == -EPIPE || try == max_tries - 1) | |
2315 | sata_down_spd_limit(link); | |
2316 | if (hardreset) | |
2317 | reset = hardreset; | |
2318 | goto retry; | |
022bdb07 TH |
2319 | } |
2320 | ||
0260731f | 2321 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2322 | struct ata_device **r_failed_dev) |
022bdb07 | 2323 | { |
0260731f TH |
2324 | struct ata_port *ap = link->ap; |
2325 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2326 | struct ata_device *dev; |
8c3c52a8 | 2327 | unsigned int new_mask = 0; |
084fe639 | 2328 | unsigned long flags; |
f58229f8 | 2329 | int rc = 0; |
022bdb07 TH |
2330 | |
2331 | DPRINTK("ENTER\n"); | |
2332 | ||
8c3c52a8 TH |
2333 | /* For PATA drive side cable detection to work, IDENTIFY must |
2334 | * be done backwards such that PDIAG- is released by the slave | |
2335 | * device before the master device is identified. | |
2336 | */ | |
0260731f | 2337 | ata_link_for_each_dev_reverse(dev, link) { |
f58229f8 TH |
2338 | unsigned int action = ata_eh_dev_action(dev); |
2339 | unsigned int readid_flags = 0; | |
022bdb07 | 2340 | |
bff04647 TH |
2341 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2342 | readid_flags |= ATA_READID_POSTRESET; | |
2343 | ||
9666f400 | 2344 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2345 | WARN_ON(dev->class == ATA_DEV_PMP); |
2346 | ||
0260731f | 2347 | if (ata_link_offline(link)) { |
022bdb07 | 2348 | rc = -EIO; |
8c3c52a8 | 2349 | goto err; |
022bdb07 TH |
2350 | } |
2351 | ||
0260731f | 2352 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2353 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2354 | readid_flags); | |
022bdb07 | 2355 | if (rc) |
8c3c52a8 | 2356 | goto err; |
022bdb07 | 2357 | |
0260731f | 2358 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2359 | |
baa1e78a TH |
2360 | /* Configuration may have changed, reconfigure |
2361 | * transfer mode. | |
2362 | */ | |
2363 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2364 | ||
3057ac3c | 2365 | /* schedule the scsi_rescan_device() here */ |
2366 | queue_work(ata_aux_wq, &(ap->scsi_rescan_task)); | |
084fe639 TH |
2367 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2368 | ehc->tries[dev->devno] && | |
2369 | ata_class_enabled(ehc->classes[dev->devno])) { | |
2370 | dev->class = ehc->classes[dev->devno]; | |
2371 | ||
633273a3 TH |
2372 | if (dev->class == ATA_DEV_PMP) |
2373 | rc = sata_pmp_attach(dev); | |
2374 | else | |
2375 | rc = ata_dev_read_id(dev, &dev->class, | |
2376 | readid_flags, dev->id); | |
8c3c52a8 TH |
2377 | switch (rc) { |
2378 | case 0: | |
f58229f8 | 2379 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2380 | break; |
2381 | case -ENOENT: | |
55a8e2c8 TH |
2382 | /* IDENTIFY was issued to non-existent |
2383 | * device. No need to reset. Just | |
2384 | * thaw and kill the device. | |
2385 | */ | |
2386 | ata_eh_thaw_port(ap); | |
084fe639 TH |
2387 | dev->class = ATA_DEV_UNKNOWN; |
2388 | break; | |
8c3c52a8 TH |
2389 | default: |
2390 | dev->class = ATA_DEV_UNKNOWN; | |
2391 | goto err; | |
084fe639 | 2392 | } |
8c3c52a8 TH |
2393 | } |
2394 | } | |
084fe639 | 2395 | |
c1c4e8d5 | 2396 | /* PDIAG- should have been released, ask cable type if post-reset */ |
9b1e2658 TH |
2397 | if (ata_is_host_link(link) && ap->ops->cable_detect && |
2398 | (ehc->i.flags & ATA_EHI_DID_RESET)) | |
c1c4e8d5 TH |
2399 | ap->cbl = ap->ops->cable_detect(ap); |
2400 | ||
8c3c52a8 TH |
2401 | /* Configure new devices forward such that user doesn't see |
2402 | * device detection messages backwards. | |
2403 | */ | |
0260731f | 2404 | ata_link_for_each_dev(dev, link) { |
633273a3 TH |
2405 | if (!(new_mask & (1 << dev->devno)) || |
2406 | dev->class == ATA_DEV_PMP) | |
8c3c52a8 TH |
2407 | continue; |
2408 | ||
2409 | ehc->i.flags |= ATA_EHI_PRINTINFO; | |
2410 | rc = ata_dev_configure(dev); | |
2411 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
2412 | if (rc) | |
2413 | goto err; | |
2414 | ||
2415 | spin_lock_irqsave(ap->lock, flags); | |
2416 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
2417 | spin_unlock_irqrestore(ap->lock, flags); | |
2418 | ||
2419 | /* new device discovered, configure xfermode */ | |
2420 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
2421 | } |
2422 | ||
8c3c52a8 | 2423 | return 0; |
022bdb07 | 2424 | |
8c3c52a8 TH |
2425 | err: |
2426 | *r_failed_dev = dev; | |
2427 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
2428 | return rc; |
2429 | } | |
2430 | ||
6f1d1e3a TH |
2431 | /** |
2432 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2433 | * @link: link on which timings will be programmed | |
2434 | * @r_failed_dev: out paramter for failed device | |
2435 | * | |
2436 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2437 | * ata_set_mode() fails, pointer to the failing device is | |
2438 | * returned in @r_failed_dev. | |
2439 | * | |
2440 | * LOCKING: | |
2441 | * PCI/etc. bus probe sem. | |
2442 | * | |
2443 | * RETURNS: | |
2444 | * 0 on success, negative errno otherwise | |
2445 | */ | |
2446 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
2447 | { | |
2448 | struct ata_port *ap = link->ap; | |
00115e0f TH |
2449 | struct ata_device *dev; |
2450 | int rc; | |
6f1d1e3a | 2451 | |
76326ac1 TH |
2452 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
2453 | ata_link_for_each_dev(dev, link) { | |
2454 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { | |
2455 | struct ata_ering_entry *ent; | |
2456 | ||
2457 | ent = ata_ering_top(&dev->ering); | |
2458 | if (ent) | |
2459 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
2460 | } | |
2461 | } | |
2462 | ||
6f1d1e3a TH |
2463 | /* has private set_mode? */ |
2464 | if (ap->ops->set_mode) | |
00115e0f TH |
2465 | rc = ap->ops->set_mode(link, r_failed_dev); |
2466 | else | |
2467 | rc = ata_do_set_mode(link, r_failed_dev); | |
2468 | ||
2469 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
2470 | ata_link_for_each_dev(dev, link) { | |
2471 | struct ata_eh_context *ehc = &link->eh_context; | |
2472 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
2473 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
2474 | ||
2475 | if (dev->xfer_mode != saved_xfer_mode || | |
2476 | ata_ncq_enabled(dev) != saved_ncq) | |
2477 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
2478 | } | |
2479 | ||
2480 | return rc; | |
6f1d1e3a TH |
2481 | } |
2482 | ||
0260731f | 2483 | static int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 2484 | { |
f58229f8 TH |
2485 | struct ata_device *dev; |
2486 | int cnt = 0; | |
022bdb07 | 2487 | |
0260731f | 2488 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2489 | if (ata_dev_enabled(dev)) |
022bdb07 TH |
2490 | cnt++; |
2491 | return cnt; | |
2492 | } | |
2493 | ||
0260731f | 2494 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 2495 | { |
f58229f8 TH |
2496 | struct ata_device *dev; |
2497 | int cnt = 0; | |
084fe639 | 2498 | |
0260731f | 2499 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2500 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
2501 | cnt++; |
2502 | return cnt; | |
2503 | } | |
2504 | ||
0260731f | 2505 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 2506 | { |
0260731f | 2507 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 2508 | struct ata_device *dev; |
084fe639 | 2509 | |
f9df58cb TH |
2510 | /* skip disabled links */ |
2511 | if (link->flags & ATA_LFLAG_DISABLED) | |
2512 | return 1; | |
2513 | ||
7c8c2cff | 2514 | /* thaw frozen port, resume link and recover failed devices */ |
0260731f TH |
2515 | if ((link->ap->pflags & ATA_PFLAG_FROZEN) || |
2516 | (ehc->i.flags & ATA_EHI_RESUME_LINK) || ata_link_nr_enabled(link)) | |
084fe639 TH |
2517 | return 0; |
2518 | ||
2519 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
0260731f | 2520 | ata_link_for_each_dev(dev, link) { |
084fe639 TH |
2521 | if (dev->class == ATA_DEV_UNKNOWN && |
2522 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
2523 | return 0; | |
2524 | } | |
2525 | ||
2526 | return 1; | |
2527 | } | |
2528 | ||
02c05a27 TH |
2529 | static int ata_eh_schedule_probe(struct ata_device *dev) |
2530 | { | |
2531 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2532 | ||
2533 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
2534 | (ehc->did_probe_mask & (1 << dev->devno))) | |
2535 | return 0; | |
2536 | ||
2537 | ata_eh_detach_dev(dev); | |
2538 | ata_dev_init(dev); | |
2539 | ehc->did_probe_mask |= (1 << dev->devno); | |
2540 | ehc->i.action |= ATA_EH_SOFTRESET; | |
00115e0f TH |
2541 | ehc->saved_xfer_mode[dev->devno] = 0; |
2542 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 TH |
2543 | |
2544 | return 1; | |
2545 | } | |
2546 | ||
9b1e2658 | 2547 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 2548 | { |
9af5c9c9 | 2549 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 TH |
2550 | |
2551 | ehc->tries[dev->devno]--; | |
2552 | ||
2553 | switch (err) { | |
2554 | case -ENODEV: | |
2555 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
2556 | ehc->i.probe_mask |= (1 << dev->devno); | |
2557 | case -EINVAL: | |
2558 | /* give it just one more chance */ | |
2559 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
2560 | case -EIO: | |
4fb4615b | 2561 | if (ehc->tries[dev->devno] == 1 && dev->pio_mode > XFER_PIO_0) { |
fee7ca72 TH |
2562 | /* This is the last chance, better to slow |
2563 | * down than lose it. | |
2564 | */ | |
936fd732 | 2565 | sata_down_spd_limit(dev->link); |
fee7ca72 TH |
2566 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2567 | } | |
2568 | } | |
2569 | ||
2570 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
2571 | /* disable device if it has used up all its chances */ | |
2572 | ata_dev_disable(dev); | |
2573 | ||
2574 | /* detach if offline */ | |
936fd732 | 2575 | if (ata_link_offline(dev->link)) |
fee7ca72 TH |
2576 | ata_eh_detach_dev(dev); |
2577 | ||
02c05a27 TH |
2578 | /* schedule probe if necessary */ |
2579 | if (ata_eh_schedule_probe(dev)) | |
fee7ca72 | 2580 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
9b1e2658 TH |
2581 | |
2582 | return 1; | |
fee7ca72 TH |
2583 | } else { |
2584 | /* soft didn't work? be haaaaard */ | |
2585 | if (ehc->i.flags & ATA_EHI_DID_RESET) | |
2586 | ehc->i.action |= ATA_EH_HARDRESET; | |
2587 | else | |
2588 | ehc->i.action |= ATA_EH_SOFTRESET; | |
9b1e2658 TH |
2589 | |
2590 | return 0; | |
fee7ca72 TH |
2591 | } |
2592 | } | |
2593 | ||
022bdb07 TH |
2594 | /** |
2595 | * ata_eh_recover - recover host port after error | |
2596 | * @ap: host port to recover | |
f5914a46 | 2597 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
2598 | * @softreset: softreset method (can be NULL) |
2599 | * @hardreset: hardreset method (can be NULL) | |
2600 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 2601 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
2602 | * |
2603 | * This is the alpha and omega, eum and yang, heart and soul of | |
2604 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
2605 | * recover each link and hotplug requests are recorded in the |
2606 | * link's eh_context. This function executes all the operations | |
2607 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 2608 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
2609 | * |
2610 | * LOCKING: | |
2611 | * Kernel thread context (may sleep). | |
2612 | * | |
2613 | * RETURNS: | |
2614 | * 0 on success, -errno on failure. | |
2615 | */ | |
fb7fd614 TH |
2616 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
2617 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
2618 | ata_postreset_fn_t postreset, | |
2619 | struct ata_link **r_failed_link) | |
022bdb07 | 2620 | { |
9b1e2658 | 2621 | struct ata_link *link; |
022bdb07 | 2622 | struct ata_device *dev; |
9b1e2658 TH |
2623 | int nr_failed_devs, nr_disabled_devs; |
2624 | int reset, rc; | |
f9df58cb | 2625 | unsigned long flags; |
022bdb07 TH |
2626 | |
2627 | DPRINTK("ENTER\n"); | |
2628 | ||
2629 | /* prep for recovery */ | |
9b1e2658 TH |
2630 | ata_port_for_each_link(link, ap) { |
2631 | struct ata_eh_context *ehc = &link->eh_context; | |
084fe639 | 2632 | |
f9df58cb TH |
2633 | /* re-enable link? */ |
2634 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
2635 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
2636 | spin_lock_irqsave(ap->lock, flags); | |
2637 | link->flags &= ~ATA_LFLAG_DISABLED; | |
2638 | spin_unlock_irqrestore(ap->lock, flags); | |
2639 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
2640 | } | |
2641 | ||
9b1e2658 | 2642 | ata_link_for_each_dev(dev, link) { |
fd995f70 TH |
2643 | if (link->flags & ATA_LFLAG_NO_RETRY) |
2644 | ehc->tries[dev->devno] = 1; | |
2645 | else | |
2646 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 2647 | |
9b1e2658 TH |
2648 | /* collect port action mask recorded in dev actions */ |
2649 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
2650 | ~ATA_EH_PERDEV_MASK; | |
2651 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
2652 | ||
2653 | /* process hotplug request */ | |
2654 | if (dev->flags & ATA_DFLAG_DETACH) | |
2655 | ata_eh_detach_dev(dev); | |
2656 | ||
02c05a27 TH |
2657 | /* schedule probe if necessary */ |
2658 | if (!ata_dev_enabled(dev)) | |
2659 | ata_eh_schedule_probe(dev); | |
084fe639 | 2660 | } |
022bdb07 TH |
2661 | } |
2662 | ||
2663 | retry: | |
022bdb07 | 2664 | rc = 0; |
9b1e2658 TH |
2665 | nr_failed_devs = 0; |
2666 | nr_disabled_devs = 0; | |
2667 | reset = 0; | |
022bdb07 | 2668 | |
aeb2ecd6 | 2669 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 2670 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
2671 | goto out; |
2672 | ||
9b1e2658 TH |
2673 | /* prep for EH */ |
2674 | ata_port_for_each_link(link, ap) { | |
2675 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2676 | |
9b1e2658 TH |
2677 | /* skip EH if possible. */ |
2678 | if (ata_eh_skip_recovery(link)) | |
2679 | ehc->i.action = 0; | |
2680 | ||
2681 | /* do we need to reset? */ | |
2682 | if (ehc->i.action & ATA_EH_RESET_MASK) | |
2683 | reset = 1; | |
2684 | ||
2685 | ata_link_for_each_dev(dev, link) | |
2686 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; | |
2687 | } | |
084fe639 | 2688 | |
022bdb07 | 2689 | /* reset */ |
9b1e2658 | 2690 | if (reset) { |
b06ce3e5 TH |
2691 | /* if PMP is attached, this function only deals with |
2692 | * downstream links, port should stay thawed. | |
2693 | */ | |
2694 | if (!ap->nr_pmp_links) | |
2695 | ata_eh_freeze_port(ap); | |
022bdb07 | 2696 | |
9b1e2658 TH |
2697 | ata_port_for_each_link(link, ap) { |
2698 | struct ata_eh_context *ehc = &link->eh_context; | |
2699 | ||
2700 | if (!(ehc->i.action & ATA_EH_RESET_MASK)) | |
2701 | continue; | |
2702 | ||
2703 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), | |
2704 | prereset, softreset, hardreset, | |
2705 | postreset); | |
2706 | if (rc) { | |
2707 | ata_link_printk(link, KERN_ERR, | |
2708 | "reset failed, giving up\n"); | |
2709 | goto out; | |
2710 | } | |
022bdb07 TH |
2711 | } |
2712 | ||
b06ce3e5 TH |
2713 | if (!ap->nr_pmp_links) |
2714 | ata_eh_thaw_port(ap); | |
022bdb07 TH |
2715 | } |
2716 | ||
9b1e2658 TH |
2717 | /* the rest */ |
2718 | ata_port_for_each_link(link, ap) { | |
2719 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2720 | |
9b1e2658 TH |
2721 | /* revalidate existing devices and attach new ones */ |
2722 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 2723 | if (rc) |
022bdb07 | 2724 | goto dev_fail; |
022bdb07 | 2725 | |
633273a3 TH |
2726 | /* if PMP got attached, return, pmp EH will take care of it */ |
2727 | if (link->device->class == ATA_DEV_PMP) { | |
2728 | ehc->i.action = 0; | |
2729 | return 0; | |
2730 | } | |
2731 | ||
9b1e2658 TH |
2732 | /* configure transfer mode if necessary */ |
2733 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
2734 | rc = ata_set_mode(link, &dev); | |
2735 | if (rc) | |
2736 | goto dev_fail; | |
2737 | ehc->i.flags &= ~ATA_EHI_SETMODE; | |
2738 | } | |
2739 | ||
ca77329f KCA |
2740 | if (ehc->i.action & ATA_EHI_LPM) |
2741 | ata_link_for_each_dev(dev, link) | |
2742 | ata_dev_enable_pm(dev, ap->pm_policy); | |
2743 | ||
9b1e2658 TH |
2744 | /* this link is okay now */ |
2745 | ehc->i.flags = 0; | |
2746 | continue; | |
022bdb07 | 2747 | |
2dcb407e | 2748 | dev_fail: |
9b1e2658 TH |
2749 | nr_failed_devs++; |
2750 | if (ata_eh_handle_dev_fail(dev, rc)) | |
2751 | nr_disabled_devs++; | |
022bdb07 | 2752 | |
b06ce3e5 TH |
2753 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
2754 | /* PMP reset requires working host port. | |
2755 | * Can't retry if it's frozen. | |
2756 | */ | |
2757 | if (ap->nr_pmp_links) | |
2758 | goto out; | |
9b1e2658 | 2759 | break; |
b06ce3e5 | 2760 | } |
022bdb07 TH |
2761 | } |
2762 | ||
9b1e2658 TH |
2763 | if (nr_failed_devs) { |
2764 | if (nr_failed_devs != nr_disabled_devs) { | |
2765 | ata_port_printk(ap, KERN_WARNING, "failed to recover " | |
2766 | "some devices, retrying in 5 secs\n"); | |
2767 | ssleep(5); | |
2768 | } else { | |
2769 | /* no device left to recover, repeat fast */ | |
2770 | msleep(500); | |
2771 | } | |
022bdb07 | 2772 | |
9b1e2658 | 2773 | goto retry; |
022bdb07 TH |
2774 | } |
2775 | ||
9b1e2658 TH |
2776 | out: |
2777 | if (rc && r_failed_link) | |
2778 | *r_failed_link = link; | |
2779 | ||
022bdb07 TH |
2780 | DPRINTK("EXIT, rc=%d\n", rc); |
2781 | return rc; | |
2782 | } | |
2783 | ||
2784 | /** | |
2785 | * ata_eh_finish - finish up EH | |
2786 | * @ap: host port to finish EH for | |
2787 | * | |
2788 | * Recovery is complete. Clean up EH states and retry or finish | |
2789 | * failed qcs. | |
2790 | * | |
2791 | * LOCKING: | |
2792 | * None. | |
2793 | */ | |
fb7fd614 | 2794 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
2795 | { |
2796 | int tag; | |
2797 | ||
2798 | /* retry or finish qcs */ | |
2799 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2800 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2801 | ||
2802 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
2803 | continue; | |
2804 | ||
2805 | if (qc->err_mask) { | |
2806 | /* FIXME: Once EH migration is complete, | |
2807 | * generate sense data in this function, | |
2808 | * considering both err_mask and tf. | |
f90f0828 TH |
2809 | * |
2810 | * There's no point in retrying invalid | |
2811 | * (detected by libata) and non-IO device | |
2812 | * errors (rejected by device). Finish them | |
2813 | * immediately. | |
022bdb07 | 2814 | */ |
f90f0828 TH |
2815 | if ((qc->err_mask & AC_ERR_INVALID) || |
2816 | (!(qc->flags & ATA_QCFLAG_IO) && | |
2817 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2818 | ata_eh_qc_complete(qc); |
2819 | else | |
2820 | ata_eh_qc_retry(qc); | |
2821 | } else { | |
2822 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
2823 | ata_eh_qc_complete(qc); | |
2824 | } else { | |
2825 | /* feed zero TF to sense generation */ | |
2826 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
2827 | ata_eh_qc_retry(qc); | |
2828 | } | |
2829 | } | |
2830 | } | |
da917d69 TH |
2831 | |
2832 | /* make sure nr_active_links is zero after EH */ | |
2833 | WARN_ON(ap->nr_active_links); | |
2834 | ap->nr_active_links = 0; | |
022bdb07 TH |
2835 | } |
2836 | ||
2837 | /** | |
2838 | * ata_do_eh - do standard error handling | |
2839 | * @ap: host port to handle error for | |
f5914a46 | 2840 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
2841 | * @softreset: softreset method (can be NULL) |
2842 | * @hardreset: hardreset method (can be NULL) | |
2843 | * @postreset: postreset method (can be NULL) | |
2844 | * | |
2845 | * Perform standard error handling sequence. | |
2846 | * | |
2847 | * LOCKING: | |
2848 | * Kernel thread context (may sleep). | |
2849 | */ | |
f5914a46 TH |
2850 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
2851 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
2852 | ata_postreset_fn_t postreset) | |
022bdb07 | 2853 | { |
9b1e2658 TH |
2854 | struct ata_device *dev; |
2855 | int rc; | |
2856 | ||
2857 | ata_eh_autopsy(ap); | |
2858 | ata_eh_report(ap); | |
2859 | ||
2860 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
2861 | NULL); | |
2862 | if (rc) { | |
2863 | ata_link_for_each_dev(dev, &ap->link) | |
2864 | ata_dev_disable(dev); | |
2865 | } | |
2866 | ||
022bdb07 TH |
2867 | ata_eh_finish(ap); |
2868 | } | |
500530f6 | 2869 | |
6ffa01d8 | 2870 | #ifdef CONFIG_PM |
500530f6 TH |
2871 | /** |
2872 | * ata_eh_handle_port_suspend - perform port suspend operation | |
2873 | * @ap: port to suspend | |
2874 | * | |
2875 | * Suspend @ap. | |
2876 | * | |
2877 | * LOCKING: | |
2878 | * Kernel thread context (may sleep). | |
2879 | */ | |
2880 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
2881 | { | |
2882 | unsigned long flags; | |
2883 | int rc = 0; | |
2884 | ||
2885 | /* are we suspending? */ | |
2886 | spin_lock_irqsave(ap->lock, flags); | |
2887 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
2888 | ap->pm_mesg.event == PM_EVENT_ON) { | |
2889 | spin_unlock_irqrestore(ap->lock, flags); | |
2890 | return; | |
2891 | } | |
2892 | spin_unlock_irqrestore(ap->lock, flags); | |
2893 | ||
2894 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
2895 | ||
64578a3d TH |
2896 | /* tell ACPI we're suspending */ |
2897 | rc = ata_acpi_on_suspend(ap); | |
2898 | if (rc) | |
2899 | goto out; | |
2900 | ||
500530f6 TH |
2901 | /* suspend */ |
2902 | ata_eh_freeze_port(ap); | |
2903 | ||
2904 | if (ap->ops->port_suspend) | |
2905 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
2906 | ||
bd3adca5 | 2907 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
64578a3d | 2908 | out: |
500530f6 TH |
2909 | /* report result */ |
2910 | spin_lock_irqsave(ap->lock, flags); | |
2911 | ||
2912 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
2913 | if (rc == 0) | |
2914 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 2915 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
2916 | ata_port_schedule_eh(ap); |
2917 | ||
2918 | if (ap->pm_result) { | |
2919 | *ap->pm_result = rc; | |
2920 | ap->pm_result = NULL; | |
2921 | } | |
2922 | ||
2923 | spin_unlock_irqrestore(ap->lock, flags); | |
2924 | ||
2925 | return; | |
2926 | } | |
2927 | ||
2928 | /** | |
2929 | * ata_eh_handle_port_resume - perform port resume operation | |
2930 | * @ap: port to resume | |
2931 | * | |
2932 | * Resume @ap. | |
2933 | * | |
500530f6 TH |
2934 | * LOCKING: |
2935 | * Kernel thread context (may sleep). | |
2936 | */ | |
2937 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
2938 | { | |
500530f6 | 2939 | unsigned long flags; |
9666f400 | 2940 | int rc = 0; |
500530f6 TH |
2941 | |
2942 | /* are we resuming? */ | |
2943 | spin_lock_irqsave(ap->lock, flags); | |
2944 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
2945 | ap->pm_mesg.event != PM_EVENT_ON) { | |
2946 | spin_unlock_irqrestore(ap->lock, flags); | |
2947 | return; | |
2948 | } | |
2949 | spin_unlock_irqrestore(ap->lock, flags); | |
2950 | ||
9666f400 | 2951 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 2952 | |
bd3adca5 SL |
2953 | ata_acpi_set_state(ap, PMSG_ON); |
2954 | ||
500530f6 TH |
2955 | if (ap->ops->port_resume) |
2956 | rc = ap->ops->port_resume(ap); | |
2957 | ||
6746544c TH |
2958 | /* tell ACPI that we're resuming */ |
2959 | ata_acpi_on_resume(ap); | |
2960 | ||
9666f400 | 2961 | /* report result */ |
500530f6 TH |
2962 | spin_lock_irqsave(ap->lock, flags); |
2963 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
2964 | if (ap->pm_result) { | |
2965 | *ap->pm_result = rc; | |
2966 | ap->pm_result = NULL; | |
2967 | } | |
2968 | spin_unlock_irqrestore(ap->lock, flags); | |
2969 | } | |
6ffa01d8 | 2970 | #endif /* CONFIG_PM */ |