Commit | Line | Data |
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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, | |
75f9cafc TH |
64 | ATA_ECAT_DUBIOUS_NONE = 4, |
65 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
66 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
67 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
68 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 69 | |
0a2c0f56 TH |
70 | /* always put at least this amount of time between resets */ |
71 | ATA_EH_RESET_COOL_DOWN = 5000, | |
72 | ||
341c2c95 TH |
73 | /* Waiting in ->prereset can never be reliable. It's |
74 | * sometimes nice to wait there but it can't be depended upon; | |
75 | * otherwise, we wouldn't be resetting. Just give it enough | |
76 | * time for most drives to spin up. | |
77 | */ | |
78 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
79 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
31daabda TH |
80 | }; |
81 | ||
82 | /* The following table determines how we sequence resets. Each entry | |
83 | * represents timeout for that try. The first try can be soft or | |
84 | * hardreset. All others are hardreset if available. In most cases | |
85 | * the first reset w/ 10sec timeout should succeed. Following entries | |
86 | * are mostly for error handling, hotplug and retarded devices. | |
87 | */ | |
88 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
89 | 10000, /* most drives spin up by 10sec */ |
90 | 10000, /* > 99% working drives spin up before 20sec */ | |
91 | 35000, /* give > 30 secs of idleness for retarded devices */ | |
92 | 5000, /* and sweet one last chance */ | |
d8af0eb6 | 93 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
94 | }; |
95 | ||
ad9e2762 | 96 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 97 | #ifdef CONFIG_PM |
500530f6 TH |
98 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
99 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
100 | #else /* CONFIG_PM */ |
101 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
102 | { } | |
103 | ||
104 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
105 | { } | |
6ffa01d8 | 106 | #endif /* CONFIG_PM */ |
ad9e2762 | 107 | |
b64bbc39 TH |
108 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
109 | va_list args) | |
110 | { | |
111 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
112 | ATA_EH_DESC_LEN - ehi->desc_len, | |
113 | fmt, args); | |
114 | } | |
115 | ||
116 | /** | |
117 | * __ata_ehi_push_desc - push error description without adding separator | |
118 | * @ehi: target EHI | |
119 | * @fmt: printf format string | |
120 | * | |
121 | * Format string according to @fmt and append it to @ehi->desc. | |
122 | * | |
123 | * LOCKING: | |
124 | * spin_lock_irqsave(host lock) | |
125 | */ | |
126 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
127 | { | |
128 | va_list args; | |
129 | ||
130 | va_start(args, fmt); | |
131 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
132 | va_end(args); | |
133 | } | |
134 | ||
135 | /** | |
136 | * ata_ehi_push_desc - push error description with separator | |
137 | * @ehi: target EHI | |
138 | * @fmt: printf format string | |
139 | * | |
140 | * Format string according to @fmt and append it to @ehi->desc. | |
141 | * If @ehi->desc is not empty, ", " is added in-between. | |
142 | * | |
143 | * LOCKING: | |
144 | * spin_lock_irqsave(host lock) | |
145 | */ | |
146 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
147 | { | |
148 | va_list args; | |
149 | ||
150 | if (ehi->desc_len) | |
151 | __ata_ehi_push_desc(ehi, ", "); | |
152 | ||
153 | va_start(args, fmt); | |
154 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
155 | va_end(args); | |
156 | } | |
157 | ||
158 | /** | |
159 | * ata_ehi_clear_desc - clean error description | |
160 | * @ehi: target EHI | |
161 | * | |
162 | * Clear @ehi->desc. | |
163 | * | |
164 | * LOCKING: | |
165 | * spin_lock_irqsave(host lock) | |
166 | */ | |
167 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
168 | { | |
169 | ehi->desc[0] = '\0'; | |
170 | ehi->desc_len = 0; | |
171 | } | |
172 | ||
cbcdd875 TH |
173 | /** |
174 | * ata_port_desc - append port description | |
175 | * @ap: target ATA port | |
176 | * @fmt: printf format string | |
177 | * | |
178 | * Format string according to @fmt and append it to port | |
179 | * description. If port description is not empty, " " is added | |
180 | * in-between. This function is to be used while initializing | |
181 | * ata_host. The description is printed on host registration. | |
182 | * | |
183 | * LOCKING: | |
184 | * None. | |
185 | */ | |
186 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
187 | { | |
188 | va_list args; | |
189 | ||
190 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
191 | ||
192 | if (ap->link.eh_info.desc_len) | |
193 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
194 | ||
195 | va_start(args, fmt); | |
196 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
197 | va_end(args); | |
198 | } | |
199 | ||
200 | #ifdef CONFIG_PCI | |
201 | ||
202 | /** | |
203 | * ata_port_pbar_desc - append PCI BAR description | |
204 | * @ap: target ATA port | |
205 | * @bar: target PCI BAR | |
206 | * @offset: offset into PCI BAR | |
207 | * @name: name of the area | |
208 | * | |
209 | * If @offset is negative, this function formats a string which | |
210 | * contains the name, address, size and type of the BAR and | |
211 | * appends it to the port description. If @offset is zero or | |
212 | * positive, only name and offsetted address is appended. | |
213 | * | |
214 | * LOCKING: | |
215 | * None. | |
216 | */ | |
217 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
218 | const char *name) | |
219 | { | |
220 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
221 | char *type = ""; | |
222 | unsigned long long start, len; | |
223 | ||
224 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
225 | type = "m"; | |
226 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
227 | type = "i"; | |
228 | ||
229 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
230 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
231 | ||
232 | if (offset < 0) | |
233 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
234 | else | |
e6a73ab1 AM |
235 | ata_port_desc(ap, "%s 0x%llx", name, |
236 | start + (unsigned long long)offset); | |
cbcdd875 TH |
237 | } |
238 | ||
239 | #endif /* CONFIG_PCI */ | |
240 | ||
3884f7b0 | 241 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
242 | unsigned int err_mask) |
243 | { | |
244 | struct ata_ering_entry *ent; | |
245 | ||
246 | WARN_ON(!err_mask); | |
247 | ||
248 | ering->cursor++; | |
249 | ering->cursor %= ATA_ERING_SIZE; | |
250 | ||
251 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 252 | ent->eflags = eflags; |
0c247c55 TH |
253 | ent->err_mask = err_mask; |
254 | ent->timestamp = get_jiffies_64(); | |
255 | } | |
256 | ||
76326ac1 TH |
257 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
258 | { | |
259 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
260 | ||
261 | if (ent->err_mask) | |
262 | return ent; | |
263 | return NULL; | |
264 | } | |
265 | ||
7d47e8d4 | 266 | static void ata_ering_clear(struct ata_ering *ering) |
0c247c55 | 267 | { |
7d47e8d4 | 268 | memset(ering, 0, sizeof(*ering)); |
0c247c55 TH |
269 | } |
270 | ||
271 | static int ata_ering_map(struct ata_ering *ering, | |
272 | int (*map_fn)(struct ata_ering_entry *, void *), | |
273 | void *arg) | |
274 | { | |
275 | int idx, rc = 0; | |
276 | struct ata_ering_entry *ent; | |
277 | ||
278 | idx = ering->cursor; | |
279 | do { | |
280 | ent = &ering->ring[idx]; | |
281 | if (!ent->err_mask) | |
282 | break; | |
283 | rc = map_fn(ent, arg); | |
284 | if (rc) | |
285 | break; | |
286 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
287 | } while (idx != ering->cursor); | |
288 | ||
289 | return rc; | |
290 | } | |
291 | ||
64f65ca6 TH |
292 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
293 | { | |
9af5c9c9 | 294 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
295 | |
296 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
297 | } | |
298 | ||
f58229f8 | 299 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
300 | struct ata_eh_info *ehi, unsigned int action) |
301 | { | |
f58229f8 | 302 | struct ata_device *tdev; |
af181c2d TH |
303 | |
304 | if (!dev) { | |
305 | ehi->action &= ~action; | |
f58229f8 TH |
306 | ata_link_for_each_dev(tdev, link) |
307 | ehi->dev_action[tdev->devno] &= ~action; | |
af181c2d TH |
308 | } else { |
309 | /* doesn't make sense for port-wide EH actions */ | |
310 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
311 | ||
312 | /* break ehi->action into ehi->dev_action */ | |
313 | if (ehi->action & action) { | |
f58229f8 TH |
314 | ata_link_for_each_dev(tdev, link) |
315 | ehi->dev_action[tdev->devno] |= | |
316 | ehi->action & action; | |
af181c2d TH |
317 | ehi->action &= ~action; |
318 | } | |
319 | ||
320 | /* turn off the specified per-dev action */ | |
321 | ehi->dev_action[dev->devno] &= ~action; | |
322 | } | |
323 | } | |
324 | ||
ece1d636 TH |
325 | /** |
326 | * ata_scsi_timed_out - SCSI layer time out callback | |
327 | * @cmd: timed out SCSI command | |
328 | * | |
329 | * Handles SCSI layer timeout. We race with normal completion of | |
330 | * the qc for @cmd. If the qc is already gone, we lose and let | |
331 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has | |
332 | * timed out and EH should be invoked. Prevent ata_qc_complete() | |
333 | * from finishing it by setting EH_SCHEDULED and return | |
334 | * EH_NOT_HANDLED. | |
335 | * | |
ad9e2762 TH |
336 | * TODO: kill this function once old EH is gone. |
337 | * | |
ece1d636 TH |
338 | * LOCKING: |
339 | * Called from timer context | |
340 | * | |
341 | * RETURNS: | |
342 | * EH_HANDLED or EH_NOT_HANDLED | |
343 | */ | |
344 | enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) | |
345 | { | |
346 | struct Scsi_Host *host = cmd->device->host; | |
35bb94b1 | 347 | struct ata_port *ap = ata_shost_to_port(host); |
ece1d636 TH |
348 | unsigned long flags; |
349 | struct ata_queued_cmd *qc; | |
ad9e2762 | 350 | enum scsi_eh_timer_return ret; |
ece1d636 TH |
351 | |
352 | DPRINTK("ENTER\n"); | |
353 | ||
ad9e2762 TH |
354 | if (ap->ops->error_handler) { |
355 | ret = EH_NOT_HANDLED; | |
356 | goto out; | |
357 | } | |
358 | ||
359 | ret = EH_HANDLED; | |
ba6a1308 | 360 | spin_lock_irqsave(ap->lock, flags); |
9af5c9c9 | 361 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
ece1d636 TH |
362 | if (qc) { |
363 | WARN_ON(qc->scsicmd != cmd); | |
364 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; | |
365 | qc->err_mask |= AC_ERR_TIMEOUT; | |
366 | ret = EH_NOT_HANDLED; | |
367 | } | |
ba6a1308 | 368 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 369 | |
ad9e2762 | 370 | out: |
ece1d636 TH |
371 | DPRINTK("EXIT, ret=%d\n", ret); |
372 | return ret; | |
373 | } | |
374 | ||
375 | /** | |
376 | * ata_scsi_error - SCSI layer error handler callback | |
377 | * @host: SCSI host on which error occurred | |
378 | * | |
379 | * Handles SCSI-layer-thrown error events. | |
380 | * | |
381 | * LOCKING: | |
382 | * Inherited from SCSI layer (none, can sleep) | |
383 | * | |
384 | * RETURNS: | |
385 | * Zero. | |
386 | */ | |
381544bb | 387 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 388 | { |
35bb94b1 | 389 | struct ata_port *ap = ata_shost_to_port(host); |
a1e10f7e | 390 | int i; |
ad9e2762 | 391 | unsigned long flags; |
ece1d636 TH |
392 | |
393 | DPRINTK("ENTER\n"); | |
394 | ||
ad9e2762 | 395 | /* synchronize with port task */ |
ece1d636 TH |
396 | ata_port_flush_task(ap); |
397 | ||
cca3974e | 398 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
399 | |
400 | /* For new EH, all qcs are finished in one of three ways - | |
401 | * normal completion, error completion, and SCSI timeout. | |
402 | * Both cmpletions can race against SCSI timeout. When normal | |
403 | * completion wins, the qc never reaches EH. When error | |
404 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
405 | * | |
406 | * When SCSI timeout wins, things are a bit more complex. | |
407 | * Normal or error completion can occur after the timeout but | |
408 | * before this point. In such cases, both types of | |
409 | * completions are honored. A scmd is determined to have | |
410 | * timed out iff its associated qc is active and not failed. | |
411 | */ | |
412 | if (ap->ops->error_handler) { | |
413 | struct scsi_cmnd *scmd, *tmp; | |
414 | int nr_timedout = 0; | |
415 | ||
e30349d2 | 416 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 TH |
417 | |
418 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { | |
419 | struct ata_queued_cmd *qc; | |
420 | ||
421 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
422 | qc = __ata_qc_from_tag(ap, i); | |
423 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
424 | qc->scsicmd == scmd) | |
425 | break; | |
426 | } | |
427 | ||
428 | if (i < ATA_MAX_QUEUE) { | |
429 | /* the scmd has an associated qc */ | |
430 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
431 | /* which hasn't failed yet, timeout */ | |
432 | qc->err_mask |= AC_ERR_TIMEOUT; | |
433 | qc->flags |= ATA_QCFLAG_FAILED; | |
434 | nr_timedout++; | |
435 | } | |
436 | } else { | |
437 | /* Normal completion occurred after | |
438 | * SCSI timeout but before this point. | |
439 | * Successfully complete it. | |
440 | */ | |
441 | scmd->retries = scmd->allowed; | |
442 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
443 | } | |
444 | } | |
445 | ||
446 | /* If we have timed out qcs. They belong to EH from | |
447 | * this point but the state of the controller is | |
448 | * unknown. Freeze the port to make sure the IRQ | |
449 | * handler doesn't diddle with those qcs. This must | |
450 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
451 | */ | |
452 | if (nr_timedout) | |
453 | __ata_port_freeze(ap); | |
454 | ||
e30349d2 | 455 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
456 | |
457 | /* initialize eh_tries */ | |
458 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 459 | } else |
e30349d2 | 460 | spin_unlock_wait(ap->lock); |
ad9e2762 TH |
461 | |
462 | repeat: | |
463 | /* invoke error handler */ | |
464 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
465 | struct ata_link *link; |
466 | ||
5ddf24c5 TH |
467 | /* kill fast drain timer */ |
468 | del_timer_sync(&ap->fastdrain_timer); | |
469 | ||
500530f6 TH |
470 | /* process port resume request */ |
471 | ata_eh_handle_port_resume(ap); | |
472 | ||
f3e81b19 | 473 | /* fetch & clear EH info */ |
e30349d2 | 474 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 475 | |
cf1b86c8 | 476 | __ata_port_for_each_link(link, ap) { |
00115e0f TH |
477 | struct ata_eh_context *ehc = &link->eh_context; |
478 | struct ata_device *dev; | |
479 | ||
cf1b86c8 TH |
480 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
481 | link->eh_context.i = link->eh_info; | |
482 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f TH |
483 | |
484 | ata_link_for_each_dev(dev, link) { | |
485 | int devno = dev->devno; | |
486 | ||
487 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
488 | if (ata_ncq_enabled(dev)) | |
489 | ehc->saved_ncq_enabled |= 1 << devno; | |
490 | } | |
0a2c0f56 TH |
491 | |
492 | /* set last reset timestamp to some time in the past */ | |
493 | ehc->last_reset = jiffies - 60 * HZ; | |
cf1b86c8 | 494 | } |
f3e81b19 | 495 | |
b51e9e5d TH |
496 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
497 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 498 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 499 | |
e30349d2 | 500 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 501 | |
500530f6 TH |
502 | /* invoke EH, skip if unloading or suspended */ |
503 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 TH |
504 | ap->ops->error_handler(ap); |
505 | else | |
506 | ata_eh_finish(ap); | |
ad9e2762 | 507 | |
500530f6 TH |
508 | /* process port suspend request */ |
509 | ata_eh_handle_port_suspend(ap); | |
510 | ||
ad9e2762 TH |
511 | /* Exception might have happend after ->error_handler |
512 | * recovered the port but before this point. Repeat | |
513 | * EH in such case. | |
514 | */ | |
e30349d2 | 515 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 516 | |
b51e9e5d | 517 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 518 | if (--ap->eh_tries) { |
e30349d2 | 519 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
520 | goto repeat; |
521 | } | |
522 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " | |
a1e10f7e | 523 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
914616a3 | 524 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
525 | } |
526 | ||
f3e81b19 | 527 | /* this run is complete, make sure EH info is clear */ |
cf1b86c8 TH |
528 | __ata_port_for_each_link(link, ap) |
529 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
f3e81b19 | 530 | |
e30349d2 | 531 | /* Clear host_eh_scheduled while holding ap->lock such |
ad9e2762 TH |
532 | * that if exception occurs after this point but |
533 | * before EH completion, SCSI midlayer will | |
534 | * re-initiate EH. | |
535 | */ | |
536 | host->host_eh_scheduled = 0; | |
537 | ||
e30349d2 | 538 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 539 | } else { |
9af5c9c9 | 540 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
541 | ap->ops->eng_timeout(ap); |
542 | } | |
ece1d636 | 543 | |
ad9e2762 | 544 | /* finish or retry handled scmd's and clean up */ |
ece1d636 TH |
545 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
546 | ||
547 | scsi_eh_flush_done_q(&ap->eh_done_q); | |
548 | ||
ad9e2762 | 549 | /* clean up */ |
e30349d2 | 550 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 551 | |
1cdaf534 | 552 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 553 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 554 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
52bad64d | 555 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, 0); |
1cdaf534 TH |
556 | |
557 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
558 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); | |
580b2102 | 559 | |
b51e9e5d | 560 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 561 | |
c6cf9e99 | 562 | /* tell wait_eh that we're done */ |
b51e9e5d | 563 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
564 | wake_up_all(&ap->eh_wait_q); |
565 | ||
e30349d2 | 566 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 567 | |
ece1d636 | 568 | DPRINTK("EXIT\n"); |
ece1d636 TH |
569 | } |
570 | ||
c6cf9e99 TH |
571 | /** |
572 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
573 | * @ap: Port to wait EH for | |
574 | * | |
575 | * Wait until the currently pending EH is complete. | |
576 | * | |
577 | * LOCKING: | |
578 | * Kernel thread context (may sleep). | |
579 | */ | |
580 | void ata_port_wait_eh(struct ata_port *ap) | |
581 | { | |
582 | unsigned long flags; | |
583 | DEFINE_WAIT(wait); | |
584 | ||
585 | retry: | |
ba6a1308 | 586 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 587 | |
b51e9e5d | 588 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 589 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 590 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 591 | schedule(); |
ba6a1308 | 592 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 593 | } |
0a1b622e | 594 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 595 | |
ba6a1308 | 596 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
597 | |
598 | /* make sure SCSI EH is complete */ | |
cca3974e | 599 | if (scsi_host_in_recovery(ap->scsi_host)) { |
c6cf9e99 TH |
600 | msleep(10); |
601 | goto retry; | |
602 | } | |
603 | } | |
604 | ||
5ddf24c5 TH |
605 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
606 | { | |
607 | unsigned int tag; | |
608 | int nr = 0; | |
609 | ||
610 | /* count only non-internal commands */ | |
611 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
612 | if (ata_qc_from_tag(ap, tag)) | |
613 | nr++; | |
614 | ||
615 | return nr; | |
616 | } | |
617 | ||
618 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
619 | { | |
620 | struct ata_port *ap = (void *)arg; | |
621 | unsigned long flags; | |
622 | int cnt; | |
623 | ||
624 | spin_lock_irqsave(ap->lock, flags); | |
625 | ||
626 | cnt = ata_eh_nr_in_flight(ap); | |
627 | ||
628 | /* are we done? */ | |
629 | if (!cnt) | |
630 | goto out_unlock; | |
631 | ||
632 | if (cnt == ap->fastdrain_cnt) { | |
633 | unsigned int tag; | |
634 | ||
635 | /* No progress during the last interval, tag all | |
636 | * in-flight qcs as timed out and freeze the port. | |
637 | */ | |
638 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
639 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
640 | if (qc) | |
641 | qc->err_mask |= AC_ERR_TIMEOUT; | |
642 | } | |
643 | ||
644 | ata_port_freeze(ap); | |
645 | } else { | |
646 | /* some qcs have finished, give it another chance */ | |
647 | ap->fastdrain_cnt = cnt; | |
648 | ap->fastdrain_timer.expires = | |
341c2c95 | 649 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
650 | add_timer(&ap->fastdrain_timer); |
651 | } | |
652 | ||
653 | out_unlock: | |
654 | spin_unlock_irqrestore(ap->lock, flags); | |
655 | } | |
656 | ||
657 | /** | |
658 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
659 | * @ap: target ATA port | |
660 | * @fastdrain: activate fast drain | |
661 | * | |
662 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
663 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
664 | * that EH kicks in in timely manner. | |
665 | * | |
666 | * LOCKING: | |
667 | * spin_lock_irqsave(host lock) | |
668 | */ | |
669 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
670 | { | |
671 | int cnt; | |
672 | ||
673 | /* already scheduled? */ | |
674 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
675 | return; | |
676 | ||
677 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
678 | ||
679 | if (!fastdrain) | |
680 | return; | |
681 | ||
682 | /* do we have in-flight qcs? */ | |
683 | cnt = ata_eh_nr_in_flight(ap); | |
684 | if (!cnt) | |
685 | return; | |
686 | ||
687 | /* activate fast drain */ | |
688 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
689 | ap->fastdrain_timer.expires = |
690 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
691 | add_timer(&ap->fastdrain_timer); |
692 | } | |
693 | ||
f686bcb8 TH |
694 | /** |
695 | * ata_qc_schedule_eh - schedule qc for error handling | |
696 | * @qc: command to schedule error handling for | |
697 | * | |
698 | * Schedule error handling for @qc. EH will kick in as soon as | |
699 | * other commands are drained. | |
700 | * | |
701 | * LOCKING: | |
cca3974e | 702 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
703 | */ |
704 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
705 | { | |
706 | struct ata_port *ap = qc->ap; | |
707 | ||
708 | WARN_ON(!ap->ops->error_handler); | |
709 | ||
710 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 711 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
712 | |
713 | /* The following will fail if timeout has already expired. | |
714 | * ata_scsi_error() takes care of such scmds on EH entry. | |
715 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
716 | * this function completes. | |
717 | */ | |
718 | scsi_req_abort_cmd(qc->scsicmd); | |
719 | } | |
720 | ||
7b70fc03 TH |
721 | /** |
722 | * ata_port_schedule_eh - schedule error handling without a qc | |
723 | * @ap: ATA port to schedule EH for | |
724 | * | |
725 | * Schedule error handling for @ap. EH will kick in as soon as | |
726 | * all commands are drained. | |
727 | * | |
728 | * LOCKING: | |
cca3974e | 729 | * spin_lock_irqsave(host lock) |
7b70fc03 TH |
730 | */ |
731 | void ata_port_schedule_eh(struct ata_port *ap) | |
732 | { | |
733 | WARN_ON(!ap->ops->error_handler); | |
734 | ||
f4d6d004 TH |
735 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
736 | return; | |
737 | ||
5ddf24c5 | 738 | ata_eh_set_pending(ap, 1); |
cca3974e | 739 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
740 | |
741 | DPRINTK("port EH scheduled\n"); | |
742 | } | |
743 | ||
dbd82616 | 744 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
745 | { |
746 | int tag, nr_aborted = 0; | |
747 | ||
748 | WARN_ON(!ap->ops->error_handler); | |
749 | ||
5ddf24c5 TH |
750 | /* we're gonna abort all commands, no need for fast drain */ |
751 | ata_eh_set_pending(ap, 0); | |
752 | ||
7b70fc03 TH |
753 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
754 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
755 | ||
dbd82616 | 756 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
757 | qc->flags |= ATA_QCFLAG_FAILED; |
758 | ata_qc_complete(qc); | |
759 | nr_aborted++; | |
760 | } | |
761 | } | |
762 | ||
763 | if (!nr_aborted) | |
764 | ata_port_schedule_eh(ap); | |
765 | ||
766 | return nr_aborted; | |
767 | } | |
768 | ||
dbd82616 TH |
769 | /** |
770 | * ata_link_abort - abort all qc's on the link | |
771 | * @link: ATA link to abort qc's for | |
772 | * | |
773 | * Abort all active qc's active on @link and schedule EH. | |
774 | * | |
775 | * LOCKING: | |
776 | * spin_lock_irqsave(host lock) | |
777 | * | |
778 | * RETURNS: | |
779 | * Number of aborted qc's. | |
780 | */ | |
781 | int ata_link_abort(struct ata_link *link) | |
782 | { | |
783 | return ata_do_link_abort(link->ap, link); | |
784 | } | |
785 | ||
786 | /** | |
787 | * ata_port_abort - abort all qc's on the port | |
788 | * @ap: ATA port to abort qc's for | |
789 | * | |
790 | * Abort all active qc's of @ap and schedule EH. | |
791 | * | |
792 | * LOCKING: | |
793 | * spin_lock_irqsave(host_set lock) | |
794 | * | |
795 | * RETURNS: | |
796 | * Number of aborted qc's. | |
797 | */ | |
798 | int ata_port_abort(struct ata_port *ap) | |
799 | { | |
800 | return ata_do_link_abort(ap, NULL); | |
801 | } | |
802 | ||
e3180499 TH |
803 | /** |
804 | * __ata_port_freeze - freeze port | |
805 | * @ap: ATA port to freeze | |
806 | * | |
807 | * This function is called when HSM violation or some other | |
808 | * condition disrupts normal operation of the port. Frozen port | |
809 | * is not allowed to perform any operation until the port is | |
810 | * thawed, which usually follows a successful reset. | |
811 | * | |
812 | * ap->ops->freeze() callback can be used for freezing the port | |
813 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
814 | * port cannot be frozen hardware-wise, the interrupt handler | |
815 | * must ack and clear interrupts unconditionally while the port | |
816 | * is frozen. | |
817 | * | |
818 | * LOCKING: | |
cca3974e | 819 | * spin_lock_irqsave(host lock) |
e3180499 TH |
820 | */ |
821 | static void __ata_port_freeze(struct ata_port *ap) | |
822 | { | |
823 | WARN_ON(!ap->ops->error_handler); | |
824 | ||
825 | if (ap->ops->freeze) | |
826 | ap->ops->freeze(ap); | |
827 | ||
b51e9e5d | 828 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 829 | |
44877b4e | 830 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
831 | } |
832 | ||
833 | /** | |
834 | * ata_port_freeze - abort & freeze port | |
835 | * @ap: ATA port to freeze | |
836 | * | |
837 | * Abort and freeze @ap. | |
838 | * | |
839 | * LOCKING: | |
cca3974e | 840 | * spin_lock_irqsave(host lock) |
e3180499 TH |
841 | * |
842 | * RETURNS: | |
843 | * Number of aborted commands. | |
844 | */ | |
845 | int ata_port_freeze(struct ata_port *ap) | |
846 | { | |
847 | int nr_aborted; | |
848 | ||
849 | WARN_ON(!ap->ops->error_handler); | |
850 | ||
851 | nr_aborted = ata_port_abort(ap); | |
852 | __ata_port_freeze(ap); | |
853 | ||
854 | return nr_aborted; | |
855 | } | |
856 | ||
7d77b247 TH |
857 | /** |
858 | * sata_async_notification - SATA async notification handler | |
859 | * @ap: ATA port where async notification is received | |
860 | * | |
861 | * Handler to be called when async notification via SDB FIS is | |
862 | * received. This function schedules EH if necessary. | |
863 | * | |
864 | * LOCKING: | |
865 | * spin_lock_irqsave(host lock) | |
866 | * | |
867 | * RETURNS: | |
868 | * 1 if EH is scheduled, 0 otherwise. | |
869 | */ | |
870 | int sata_async_notification(struct ata_port *ap) | |
871 | { | |
872 | u32 sntf; | |
873 | int rc; | |
874 | ||
875 | if (!(ap->flags & ATA_FLAG_AN)) | |
876 | return 0; | |
877 | ||
878 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
879 | if (rc == 0) | |
880 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
881 | ||
071f44b1 | 882 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 883 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 884 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
885 | /* PMP is not attached. Check whether ATAPI |
886 | * AN is configured. If so, notify media | |
887 | * change. | |
888 | */ | |
889 | struct ata_device *dev = ap->link.device; | |
890 | ||
891 | if ((dev->class == ATA_DEV_ATAPI) && | |
892 | (dev->flags & ATA_DFLAG_AN)) | |
893 | ata_scsi_media_change_notify(dev); | |
894 | return 0; | |
895 | } else { | |
896 | /* PMP is attached but SNTF is not available. | |
897 | * ATAPI async media change notification is | |
898 | * not used. The PMP must be reporting PHY | |
899 | * status change, schedule EH. | |
900 | */ | |
901 | ata_port_schedule_eh(ap); | |
902 | return 1; | |
903 | } | |
904 | } else { | |
905 | /* PMP is attached and SNTF is available */ | |
906 | struct ata_link *link; | |
907 | ||
908 | /* check and notify ATAPI AN */ | |
909 | ata_port_for_each_link(link, ap) { | |
910 | if (!(sntf & (1 << link->pmp))) | |
911 | continue; | |
912 | ||
913 | if ((link->device->class == ATA_DEV_ATAPI) && | |
914 | (link->device->flags & ATA_DFLAG_AN)) | |
915 | ata_scsi_media_change_notify(link->device); | |
916 | } | |
917 | ||
918 | /* If PMP is reporting that PHY status of some | |
919 | * downstream ports has changed, schedule EH. | |
920 | */ | |
921 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
922 | ata_port_schedule_eh(ap); | |
923 | return 1; | |
924 | } | |
925 | ||
926 | return 0; | |
927 | } | |
928 | } | |
929 | ||
e3180499 TH |
930 | /** |
931 | * ata_eh_freeze_port - EH helper to freeze port | |
932 | * @ap: ATA port to freeze | |
933 | * | |
934 | * Freeze @ap. | |
935 | * | |
936 | * LOCKING: | |
937 | * None. | |
938 | */ | |
939 | void ata_eh_freeze_port(struct ata_port *ap) | |
940 | { | |
941 | unsigned long flags; | |
942 | ||
943 | if (!ap->ops->error_handler) | |
944 | return; | |
945 | ||
ba6a1308 | 946 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 947 | __ata_port_freeze(ap); |
ba6a1308 | 948 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
949 | } |
950 | ||
951 | /** | |
952 | * ata_port_thaw_port - EH helper to thaw port | |
953 | * @ap: ATA port to thaw | |
954 | * | |
955 | * Thaw frozen port @ap. | |
956 | * | |
957 | * LOCKING: | |
958 | * None. | |
959 | */ | |
960 | void ata_eh_thaw_port(struct ata_port *ap) | |
961 | { | |
962 | unsigned long flags; | |
963 | ||
964 | if (!ap->ops->error_handler) | |
965 | return; | |
966 | ||
ba6a1308 | 967 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 968 | |
b51e9e5d | 969 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
970 | |
971 | if (ap->ops->thaw) | |
972 | ap->ops->thaw(ap); | |
973 | ||
ba6a1308 | 974 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 975 | |
44877b4e | 976 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
977 | } |
978 | ||
ece1d636 TH |
979 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
980 | { | |
981 | /* nada */ | |
982 | } | |
983 | ||
984 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
985 | { | |
986 | struct ata_port *ap = qc->ap; | |
987 | struct scsi_cmnd *scmd = qc->scsicmd; | |
988 | unsigned long flags; | |
989 | ||
ba6a1308 | 990 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
991 | qc->scsidone = ata_eh_scsidone; |
992 | __ata_qc_complete(qc); | |
993 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 994 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
995 | |
996 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
997 | } | |
998 | ||
999 | /** | |
1000 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1001 | * @qc: Command to complete | |
1002 | * | |
1003 | * Indicate to the mid and upper layers that an ATA command has | |
1004 | * completed. To be used from EH. | |
1005 | */ | |
1006 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1007 | { | |
1008 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1009 | scmd->retries = scmd->allowed; | |
1010 | __ata_eh_qc_complete(qc); | |
1011 | } | |
1012 | ||
1013 | /** | |
1014 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1015 | * @qc: Command to retry | |
1016 | * | |
1017 | * Indicate to the mid and upper layers that an ATA command | |
1018 | * should be retried. To be used from EH. | |
1019 | * | |
1020 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
1021 | * scmd->retries is decremented for commands which get retried | |
1022 | * due to unrelated failures (qc->err_mask is zero). | |
1023 | */ | |
1024 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1025 | { | |
1026 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1027 | if (!qc->err_mask && scmd->retries) | |
1028 | scmd->retries--; | |
1029 | __ata_eh_qc_complete(qc); | |
1030 | } | |
022bdb07 | 1031 | |
0ea035a3 TH |
1032 | /** |
1033 | * ata_eh_detach_dev - detach ATA device | |
1034 | * @dev: ATA device to detach | |
1035 | * | |
1036 | * Detach @dev. | |
1037 | * | |
1038 | * LOCKING: | |
1039 | * None. | |
1040 | */ | |
fb7fd614 | 1041 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1042 | { |
f58229f8 TH |
1043 | struct ata_link *link = dev->link; |
1044 | struct ata_port *ap = link->ap; | |
0ea035a3 TH |
1045 | unsigned long flags; |
1046 | ||
1047 | ata_dev_disable(dev); | |
1048 | ||
ba6a1308 | 1049 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1050 | |
1051 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1052 | ||
1053 | if (ata_scsi_offline_dev(dev)) { | |
1054 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1055 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1056 | } |
1057 | ||
beb07c1a | 1058 | /* clear per-dev EH actions */ |
f58229f8 TH |
1059 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1060 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
beb07c1a | 1061 | |
ba6a1308 | 1062 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1063 | } |
1064 | ||
022bdb07 TH |
1065 | /** |
1066 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1067 | * @link: target ATA link |
47005f25 | 1068 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1069 | * @action: action about to be performed |
1070 | * | |
1071 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1072 | * in @link->eh_info such that eh actions are not unnecessarily |
1073 | * repeated. | |
022bdb07 TH |
1074 | * |
1075 | * LOCKING: | |
1076 | * None. | |
1077 | */ | |
fb7fd614 TH |
1078 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1079 | unsigned int action) | |
022bdb07 | 1080 | { |
955e57df TH |
1081 | struct ata_port *ap = link->ap; |
1082 | struct ata_eh_info *ehi = &link->eh_info; | |
1083 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1084 | unsigned long flags; |
1085 | ||
ba6a1308 | 1086 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1087 | |
955e57df | 1088 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1089 | |
13abf50d | 1090 | if (!(ehc->i.flags & ATA_EHI_QUIET)) |
1cdaf534 TH |
1091 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1092 | ||
ba6a1308 | 1093 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1094 | } |
1095 | ||
47005f25 TH |
1096 | /** |
1097 | * ata_eh_done - EH action complete | |
955e57df | 1098 | * @ap: target ATA port |
47005f25 TH |
1099 | * @dev: target ATA dev for per-dev action (can be NULL) |
1100 | * @action: action just completed | |
1101 | * | |
1102 | * Called right after performing EH actions to clear related bits | |
955e57df | 1103 | * in @link->eh_context. |
47005f25 TH |
1104 | * |
1105 | * LOCKING: | |
1106 | * None. | |
1107 | */ | |
fb7fd614 TH |
1108 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1109 | unsigned int action) | |
47005f25 | 1110 | { |
955e57df | 1111 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1112 | |
955e57df | 1113 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1114 | } |
1115 | ||
022bdb07 TH |
1116 | /** |
1117 | * ata_err_string - convert err_mask to descriptive string | |
1118 | * @err_mask: error mask to convert to string | |
1119 | * | |
1120 | * Convert @err_mask to descriptive string. Errors are | |
1121 | * prioritized according to severity and only the most severe | |
1122 | * error is reported. | |
1123 | * | |
1124 | * LOCKING: | |
1125 | * None. | |
1126 | * | |
1127 | * RETURNS: | |
1128 | * Descriptive string for @err_mask | |
1129 | */ | |
2dcb407e | 1130 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1131 | { |
1132 | if (err_mask & AC_ERR_HOST_BUS) | |
1133 | return "host bus error"; | |
1134 | if (err_mask & AC_ERR_ATA_BUS) | |
1135 | return "ATA bus error"; | |
1136 | if (err_mask & AC_ERR_TIMEOUT) | |
1137 | return "timeout"; | |
1138 | if (err_mask & AC_ERR_HSM) | |
1139 | return "HSM violation"; | |
1140 | if (err_mask & AC_ERR_SYSTEM) | |
1141 | return "internal error"; | |
1142 | if (err_mask & AC_ERR_MEDIA) | |
1143 | return "media error"; | |
1144 | if (err_mask & AC_ERR_INVALID) | |
1145 | return "invalid argument"; | |
1146 | if (err_mask & AC_ERR_DEV) | |
1147 | return "device error"; | |
1148 | return "unknown error"; | |
1149 | } | |
1150 | ||
e8ee8451 TH |
1151 | /** |
1152 | * ata_read_log_page - read a specific log page | |
1153 | * @dev: target device | |
1154 | * @page: page to read | |
1155 | * @buf: buffer to store read page | |
1156 | * @sectors: number of sectors to read | |
1157 | * | |
1158 | * Read log page using READ_LOG_EXT command. | |
1159 | * | |
1160 | * LOCKING: | |
1161 | * Kernel thread context (may sleep). | |
1162 | * | |
1163 | * RETURNS: | |
1164 | * 0 on success, AC_ERR_* mask otherwise. | |
1165 | */ | |
1166 | static unsigned int ata_read_log_page(struct ata_device *dev, | |
1167 | u8 page, void *buf, unsigned int sectors) | |
1168 | { | |
1169 | struct ata_taskfile tf; | |
1170 | unsigned int err_mask; | |
1171 | ||
1172 | DPRINTK("read log page - page %d\n", page); | |
1173 | ||
1174 | ata_tf_init(dev, &tf); | |
1175 | tf.command = ATA_CMD_READ_LOG_EXT; | |
1176 | tf.lbal = page; | |
1177 | tf.nsect = sectors; | |
1178 | tf.hob_nsect = sectors >> 8; | |
1179 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
1180 | tf.protocol = ATA_PROT_PIO; | |
1181 | ||
1182 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1183 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 TH |
1184 | |
1185 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
1186 | return err_mask; | |
1187 | } | |
1188 | ||
1189 | /** | |
1190 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1191 | * @dev: Device to read log page 10h from | |
1192 | * @tag: Resulting tag of the failed command | |
1193 | * @tf: Resulting taskfile registers of the failed command | |
1194 | * | |
1195 | * Read log page 10h to obtain NCQ error details and clear error | |
1196 | * condition. | |
1197 | * | |
1198 | * LOCKING: | |
1199 | * Kernel thread context (may sleep). | |
1200 | * | |
1201 | * RETURNS: | |
1202 | * 0 on success, -errno otherwise. | |
1203 | */ | |
1204 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1205 | int *tag, struct ata_taskfile *tf) | |
1206 | { | |
9af5c9c9 | 1207 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1208 | unsigned int err_mask; |
1209 | u8 csum; | |
1210 | int i; | |
1211 | ||
1212 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); | |
1213 | if (err_mask) | |
1214 | return -EIO; | |
1215 | ||
1216 | csum = 0; | |
1217 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1218 | csum += buf[i]; | |
1219 | if (csum) | |
1220 | ata_dev_printk(dev, KERN_WARNING, | |
1221 | "invalid checksum 0x%x on log page 10h\n", csum); | |
1222 | ||
1223 | if (buf[0] & 0x80) | |
1224 | return -ENOENT; | |
1225 | ||
1226 | *tag = buf[0] & 0x1f; | |
1227 | ||
1228 | tf->command = buf[2]; | |
1229 | tf->feature = buf[3]; | |
1230 | tf->lbal = buf[4]; | |
1231 | tf->lbam = buf[5]; | |
1232 | tf->lbah = buf[6]; | |
1233 | tf->device = buf[7]; | |
1234 | tf->hob_lbal = buf[8]; | |
1235 | tf->hob_lbam = buf[9]; | |
1236 | tf->hob_lbah = buf[10]; | |
1237 | tf->nsect = buf[12]; | |
1238 | tf->hob_nsect = buf[13]; | |
1239 | ||
1240 | return 0; | |
1241 | } | |
1242 | ||
022bdb07 TH |
1243 | /** |
1244 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1245 | * @dev: device to perform REQUEST_SENSE to | |
1246 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
1247 | * | |
1248 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1249 | * SENSE. This function is EH helper. | |
1250 | * | |
1251 | * LOCKING: | |
1252 | * Kernel thread context (may sleep). | |
1253 | * | |
1254 | * RETURNS: | |
1255 | * 0 on success, AC_ERR_* mask on failure | |
1256 | */ | |
56287768 | 1257 | static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc) |
022bdb07 | 1258 | { |
56287768 AL |
1259 | struct ata_device *dev = qc->dev; |
1260 | unsigned char *sense_buf = qc->scsicmd->sense_buffer; | |
9af5c9c9 | 1261 | struct ata_port *ap = dev->link->ap; |
022bdb07 TH |
1262 | struct ata_taskfile tf; |
1263 | u8 cdb[ATAPI_CDB_LEN]; | |
1264 | ||
1265 | DPRINTK("ATAPI request sense\n"); | |
1266 | ||
022bdb07 TH |
1267 | /* FIXME: is this needed? */ |
1268 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
1269 | ||
56287768 AL |
1270 | /* initialize sense_buf with the error register, |
1271 | * for the case where they are -not- overwritten | |
1272 | */ | |
022bdb07 | 1273 | sense_buf[0] = 0x70; |
56287768 AL |
1274 | sense_buf[2] = qc->result_tf.feature >> 4; |
1275 | ||
a617c09f | 1276 | /* some devices time out if garbage left in tf */ |
56287768 | 1277 | ata_tf_init(dev, &tf); |
022bdb07 TH |
1278 | |
1279 | memset(cdb, 0, ATAPI_CDB_LEN); | |
1280 | cdb[0] = REQUEST_SENSE; | |
1281 | cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
1282 | ||
1283 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1284 | tf.command = ATA_CMD_PACKET; | |
1285 | ||
1286 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1287 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1288 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1289 | tf.feature |= ATAPI_PKT_DMA; |
1290 | } else { | |
0dc36888 | 1291 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1292 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1293 | tf.lbah = 0; | |
022bdb07 TH |
1294 | } |
1295 | ||
1296 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1297 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1298 | } |
1299 | ||
1300 | /** | |
1301 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1302 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1303 | * |
1304 | * Analyze SError if available and further determine cause of | |
1305 | * failure. | |
1306 | * | |
1307 | * LOCKING: | |
1308 | * None. | |
1309 | */ | |
0260731f | 1310 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1311 | { |
0260731f | 1312 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1313 | u32 serror = ehc->i.serror; |
1314 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1315 | u32 hotplug_mask; |
022bdb07 | 1316 | |
e0614db2 | 1317 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1318 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1319 | action |= ATA_EH_RESET; |
022bdb07 TH |
1320 | } |
1321 | if (serror & SERR_PROTOCOL) { | |
1322 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1323 | action |= ATA_EH_RESET; |
022bdb07 TH |
1324 | } |
1325 | if (serror & SERR_INTERNAL) { | |
1326 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1327 | action |= ATA_EH_RESET; |
022bdb07 | 1328 | } |
f9df58cb TH |
1329 | |
1330 | /* Determine whether a hotplug event has occurred. Both | |
1331 | * SError.N/X are considered hotplug events for enabled or | |
1332 | * host links. For disabled PMP links, only N bit is | |
1333 | * considered as X bit is left at 1 for link plugging. | |
1334 | */ | |
1335 | hotplug_mask = 0; | |
1336 | ||
1337 | if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
1338 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; | |
1339 | else | |
1340 | hotplug_mask = SERR_PHYRDY_CHG; | |
1341 | ||
1342 | if (serror & hotplug_mask) | |
084fe639 | 1343 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1344 | |
1345 | ehc->i.err_mask |= err_mask; | |
1346 | ehc->i.action |= action; | |
1347 | } | |
1348 | ||
e8ee8451 TH |
1349 | /** |
1350 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1351 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1352 | * |
1353 | * Read log page 10h, determine the offending qc and acquire | |
1354 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1355 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1356 | * care of the rest. | |
1357 | * | |
1358 | * LOCKING: | |
1359 | * Kernel thread context (may sleep). | |
1360 | */ | |
10acf3b0 | 1361 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1362 | { |
0260731f TH |
1363 | struct ata_port *ap = link->ap; |
1364 | struct ata_eh_context *ehc = &link->eh_context; | |
1365 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1366 | struct ata_queued_cmd *qc; |
1367 | struct ata_taskfile tf; | |
1368 | int tag, rc; | |
1369 | ||
1370 | /* if frozen, we can't do much */ | |
b51e9e5d | 1371 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1372 | return; |
1373 | ||
1374 | /* is it NCQ device error? */ | |
0260731f | 1375 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1376 | return; |
1377 | ||
1378 | /* has LLDD analyzed already? */ | |
1379 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1380 | qc = __ata_qc_from_tag(ap, tag); | |
1381 | ||
1382 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1383 | continue; | |
1384 | ||
1385 | if (qc->err_mask) | |
1386 | return; | |
1387 | } | |
1388 | ||
1389 | /* okay, this error is ours */ | |
1390 | rc = ata_eh_read_log_10h(dev, &tag, &tf); | |
1391 | if (rc) { | |
0260731f | 1392 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
e8ee8451 TH |
1393 | "(errno=%d)\n", rc); |
1394 | return; | |
1395 | } | |
1396 | ||
0260731f TH |
1397 | if (!(link->sactive & (1 << tag))) { |
1398 | ata_link_printk(link, KERN_ERR, "log page 10h reported " | |
e8ee8451 TH |
1399 | "inactive tag %d\n", tag); |
1400 | return; | |
1401 | } | |
1402 | ||
1403 | /* we've got the perpetrator, condemn it */ | |
1404 | qc = __ata_qc_from_tag(ap, tag); | |
1405 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1406 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1407 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
e8ee8451 TH |
1408 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1409 | } | |
1410 | ||
022bdb07 TH |
1411 | /** |
1412 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1413 | * @qc: qc to analyze | |
1414 | * @tf: Taskfile registers to analyze | |
1415 | * | |
1416 | * Analyze taskfile of @qc and further determine cause of | |
1417 | * failure. This function also requests ATAPI sense data if | |
1418 | * avaliable. | |
1419 | * | |
1420 | * LOCKING: | |
1421 | * Kernel thread context (may sleep). | |
1422 | * | |
1423 | * RETURNS: | |
1424 | * Determined recovery action | |
1425 | */ | |
1426 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1427 | const struct ata_taskfile *tf) | |
1428 | { | |
1429 | unsigned int tmp, action = 0; | |
1430 | u8 stat = tf->command, err = tf->feature; | |
1431 | ||
1432 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1433 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1434 | return ATA_EH_RESET; |
022bdb07 TH |
1435 | } |
1436 | ||
a51d644a TH |
1437 | if (stat & (ATA_ERR | ATA_DF)) |
1438 | qc->err_mask |= AC_ERR_DEV; | |
1439 | else | |
022bdb07 TH |
1440 | return 0; |
1441 | ||
1442 | switch (qc->dev->class) { | |
1443 | case ATA_DEV_ATA: | |
1444 | if (err & ATA_ICRC) | |
1445 | qc->err_mask |= AC_ERR_ATA_BUS; | |
1446 | if (err & ATA_UNC) | |
1447 | qc->err_mask |= AC_ERR_MEDIA; | |
1448 | if (err & ATA_IDNF) | |
1449 | qc->err_mask |= AC_ERR_INVALID; | |
1450 | break; | |
1451 | ||
1452 | case ATA_DEV_ATAPI: | |
a569a30d | 1453 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
56287768 | 1454 | tmp = atapi_eh_request_sense(qc); |
a569a30d TH |
1455 | if (!tmp) { |
1456 | /* ATA_QCFLAG_SENSE_VALID is used to | |
1457 | * tell atapi_qc_complete() that sense | |
1458 | * data is already valid. | |
1459 | * | |
1460 | * TODO: interpret sense data and set | |
1461 | * appropriate err_mask. | |
1462 | */ | |
1463 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
1464 | } else | |
1465 | qc->err_mask |= tmp; | |
1466 | } | |
022bdb07 TH |
1467 | } |
1468 | ||
1469 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) | |
cf480626 | 1470 | action |= ATA_EH_RESET; |
022bdb07 TH |
1471 | |
1472 | return action; | |
1473 | } | |
1474 | ||
76326ac1 TH |
1475 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1476 | int *xfer_ok) | |
022bdb07 | 1477 | { |
76326ac1 TH |
1478 | int base = 0; |
1479 | ||
1480 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1481 | *xfer_ok = 1; | |
1482 | ||
1483 | if (!*xfer_ok) | |
75f9cafc | 1484 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1485 | |
7d47e8d4 | 1486 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1487 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1488 | |
7d47e8d4 | 1489 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1490 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1491 | |
3884f7b0 | 1492 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1493 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1494 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1495 | if ((err_mask & |
1496 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1497 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1498 | } |
1499 | ||
1500 | return 0; | |
1501 | } | |
1502 | ||
7d47e8d4 | 1503 | struct speed_down_verdict_arg { |
022bdb07 | 1504 | u64 since; |
76326ac1 | 1505 | int xfer_ok; |
3884f7b0 | 1506 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1507 | }; |
1508 | ||
7d47e8d4 | 1509 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1510 | { |
7d47e8d4 | 1511 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1512 | int cat; |
022bdb07 TH |
1513 | |
1514 | if (ent->timestamp < arg->since) | |
1515 | return -1; | |
1516 | ||
76326ac1 TH |
1517 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1518 | &arg->xfer_ok); | |
7d47e8d4 | 1519 | arg->nr_errors[cat]++; |
76326ac1 | 1520 | |
022bdb07 TH |
1521 | return 0; |
1522 | } | |
1523 | ||
1524 | /** | |
7d47e8d4 | 1525 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1526 | * @dev: Device of interest |
1527 | * | |
1528 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1529 | * whether NCQ needs to be turned off, transfer speed should be |
1530 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1531 | * |
3884f7b0 TH |
1532 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1533 | * | |
1534 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1535 | * IO commands | |
1536 | * | |
1537 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1538 | * | |
76326ac1 TH |
1539 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1540 | * data transfer hasn't been verified. | |
1541 | * | |
3884f7b0 TH |
1542 | * Verdicts are |
1543 | * | |
1544 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1545 | * |
3884f7b0 TH |
1546 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1547 | * to PIO. | |
7d47e8d4 | 1548 | * |
3884f7b0 | 1549 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1550 | * |
3884f7b0 | 1551 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1552 | * taken per error. An action triggered by non-DUBIOUS errors |
1553 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1554 | * This is to expedite speed down decisions right after device is | |
1555 | * initially configured. | |
1556 | * | |
1557 | * The followings are speed down rules. #1 and #2 deal with | |
1558 | * DUBIOUS errors. | |
7d47e8d4 | 1559 | * |
76326ac1 TH |
1560 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1561 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1562 | * | |
1563 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1564 | * occurred during last 5 mins, NCQ_OFF. | |
1565 | * | |
1566 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
3884f7b0 | 1567 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1568 | * |
76326ac1 | 1569 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1570 | * during last 10 mins, NCQ_OFF. |
1571 | * | |
76326ac1 | 1572 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1573 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1574 | * |
022bdb07 TH |
1575 | * LOCKING: |
1576 | * Inherited from caller. | |
1577 | * | |
1578 | * RETURNS: | |
7d47e8d4 | 1579 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1580 | */ |
7d47e8d4 | 1581 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1582 | { |
7d47e8d4 TH |
1583 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1584 | u64 j64 = get_jiffies_64(); | |
1585 | struct speed_down_verdict_arg arg; | |
1586 | unsigned int verdict = 0; | |
022bdb07 | 1587 | |
3884f7b0 | 1588 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1589 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1590 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1591 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1592 | |
76326ac1 TH |
1593 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1594 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1595 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1596 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1597 | ||
1598 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1599 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1600 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1601 | ||
3884f7b0 TH |
1602 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1603 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1604 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1605 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1606 | |
3884f7b0 | 1607 | /* scan past 10 mins of error history */ |
022bdb07 | 1608 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1609 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1610 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1611 | |
3884f7b0 TH |
1612 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1613 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1614 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1615 | ||
1616 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1617 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1618 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1619 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1620 | |
7d47e8d4 | 1621 | return verdict; |
022bdb07 TH |
1622 | } |
1623 | ||
1624 | /** | |
1625 | * ata_eh_speed_down - record error and speed down if necessary | |
1626 | * @dev: Failed device | |
3884f7b0 | 1627 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1628 | * @err_mask: err_mask of the error |
1629 | * | |
1630 | * Record error and examine error history to determine whether | |
1631 | * adjusting transmission speed is necessary. It also sets | |
1632 | * transmission limits appropriately if such adjustment is | |
1633 | * necessary. | |
1634 | * | |
1635 | * LOCKING: | |
1636 | * Kernel thread context (may sleep). | |
1637 | * | |
1638 | * RETURNS: | |
7d47e8d4 | 1639 | * Determined recovery action. |
022bdb07 | 1640 | */ |
3884f7b0 TH |
1641 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1642 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1643 | { |
3884f7b0 | 1644 | struct ata_link *link = dev->link; |
76326ac1 | 1645 | int xfer_ok = 0; |
7d47e8d4 TH |
1646 | unsigned int verdict; |
1647 | unsigned int action = 0; | |
1648 | ||
1649 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1650 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1651 | return 0; |
1652 | ||
1653 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1654 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1655 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1656 | |
7d47e8d4 TH |
1657 | /* turn off NCQ? */ |
1658 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1659 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1660 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1661 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
1662 | ata_dev_printk(dev, KERN_WARNING, | |
1663 | "NCQ disabled due to excessive errors\n"); | |
1664 | goto done; | |
1665 | } | |
022bdb07 | 1666 | |
7d47e8d4 TH |
1667 | /* speed down? */ |
1668 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1669 | /* speed down SATA link speed if possible */ | |
3884f7b0 | 1670 | if (sata_down_spd_limit(link) == 0) { |
cf480626 | 1671 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1672 | goto done; |
1673 | } | |
022bdb07 | 1674 | |
7d47e8d4 TH |
1675 | /* lower transfer mode */ |
1676 | if (dev->spdn_cnt < 2) { | |
1677 | static const int dma_dnxfer_sel[] = | |
1678 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1679 | static const int pio_dnxfer_sel[] = | |
1680 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1681 | int sel; | |
1682 | ||
1683 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1684 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1685 | else | |
1686 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1687 | ||
1688 | dev->spdn_cnt++; | |
1689 | ||
1690 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1691 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1692 | goto done; |
1693 | } | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1698 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1699 | */ |
1700 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1701 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1702 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1703 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1704 | dev->spdn_cnt = 0; | |
cf480626 | 1705 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1706 | goto done; |
1707 | } | |
1708 | } | |
022bdb07 | 1709 | |
022bdb07 | 1710 | return 0; |
7d47e8d4 TH |
1711 | done: |
1712 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1713 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1714 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1715 | return action; |
022bdb07 TH |
1716 | } |
1717 | ||
1718 | /** | |
9b1e2658 TH |
1719 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1720 | * @link: host link to perform autopsy on | |
022bdb07 | 1721 | * |
0260731f TH |
1722 | * Analyze why @link failed and determine which recovery actions |
1723 | * are needed. This function also sets more detailed AC_ERR_* | |
1724 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1725 | * |
1726 | * LOCKING: | |
1727 | * Kernel thread context (may sleep). | |
1728 | */ | |
9b1e2658 | 1729 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1730 | { |
0260731f | 1731 | struct ata_port *ap = link->ap; |
936fd732 | 1732 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 1733 | struct ata_device *dev; |
3884f7b0 TH |
1734 | unsigned int all_err_mask = 0, eflags = 0; |
1735 | int tag; | |
022bdb07 TH |
1736 | u32 serror; |
1737 | int rc; | |
1738 | ||
1739 | DPRINTK("ENTER\n"); | |
1740 | ||
1cdaf534 TH |
1741 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1742 | return; | |
1743 | ||
022bdb07 | 1744 | /* obtain and analyze SError */ |
936fd732 | 1745 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1746 | if (rc == 0) { |
1747 | ehc->i.serror |= serror; | |
0260731f | 1748 | ata_eh_analyze_serror(link); |
4e57c517 | 1749 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 1750 | /* SError read failed, force reset and probing */ |
b558eddd | 1751 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 1752 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
1753 | ehc->i.err_mask |= AC_ERR_OTHER; |
1754 | } | |
022bdb07 | 1755 | |
e8ee8451 | 1756 | /* analyze NCQ failure */ |
0260731f | 1757 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 1758 | |
022bdb07 TH |
1759 | /* any real error trumps AC_ERR_OTHER */ |
1760 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
1761 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
1762 | ||
1763 | all_err_mask |= ehc->i.err_mask; | |
1764 | ||
1765 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1766 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1767 | ||
0260731f | 1768 | if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link) |
022bdb07 TH |
1769 | continue; |
1770 | ||
1771 | /* inherit upper level err_mask */ | |
1772 | qc->err_mask |= ehc->i.err_mask; | |
1773 | ||
022bdb07 | 1774 | /* analyze TF */ |
4528e4da | 1775 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
1776 | |
1777 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
1778 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
1779 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
1780 | AC_ERR_INVALID); | |
1781 | ||
1782 | /* any real error trumps unknown error */ | |
1783 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1784 | qc->err_mask &= ~AC_ERR_OTHER; | |
1785 | ||
1786 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 1787 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 1788 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 | 1789 | |
03faab78 TH |
1790 | /* determine whether the command is worth retrying */ |
1791 | if (!(qc->err_mask & AC_ERR_INVALID) && | |
1792 | ((qc->flags & ATA_QCFLAG_IO) || qc->err_mask != AC_ERR_DEV)) | |
1793 | qc->flags |= ATA_QCFLAG_RETRY; | |
1794 | ||
022bdb07 | 1795 | /* accumulate error info */ |
4528e4da | 1796 | ehc->i.dev = qc->dev; |
022bdb07 TH |
1797 | all_err_mask |= qc->err_mask; |
1798 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 1799 | eflags |= ATA_EFLAG_IS_IO; |
022bdb07 TH |
1800 | } |
1801 | ||
a20f33ff | 1802 | /* enforce default EH actions */ |
b51e9e5d | 1803 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 1804 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 1805 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
1806 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
1807 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 1808 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 1809 | |
dfcc173d TH |
1810 | /* If we have offending qcs and the associated failed device, |
1811 | * perform per-dev EH action only on the offending device. | |
1812 | */ | |
4528e4da | 1813 | if (ehc->i.dev) { |
4528e4da TH |
1814 | ehc->i.dev_action[ehc->i.dev->devno] |= |
1815 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
1816 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
1817 | } |
1818 | ||
2695e366 TH |
1819 | /* propagate timeout to host link */ |
1820 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
1821 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
1822 | ||
1823 | /* record error and consider speeding down */ | |
dfcc173d | 1824 | dev = ehc->i.dev; |
2695e366 TH |
1825 | if (!dev && ((ata_link_max_devices(link) == 1 && |
1826 | ata_dev_enabled(link->device)))) | |
1827 | dev = link->device; | |
dfcc173d | 1828 | |
76326ac1 TH |
1829 | if (dev) { |
1830 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
1831 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 1832 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 1833 | } |
dfcc173d | 1834 | |
022bdb07 TH |
1835 | DPRINTK("EXIT\n"); |
1836 | } | |
1837 | ||
1838 | /** | |
9b1e2658 TH |
1839 | * ata_eh_autopsy - analyze error and determine recovery action |
1840 | * @ap: host port to perform autopsy on | |
1841 | * | |
1842 | * Analyze all links of @ap and determine why they failed and | |
1843 | * which recovery actions are needed. | |
1844 | * | |
1845 | * LOCKING: | |
1846 | * Kernel thread context (may sleep). | |
1847 | */ | |
fb7fd614 | 1848 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
1849 | { |
1850 | struct ata_link *link; | |
1851 | ||
2695e366 | 1852 | ata_port_for_each_link(link, ap) |
9b1e2658 | 1853 | ata_eh_link_autopsy(link); |
2695e366 TH |
1854 | |
1855 | /* Autopsy of fanout ports can affect host link autopsy. | |
1856 | * Perform host link autopsy last. | |
1857 | */ | |
071f44b1 | 1858 | if (sata_pmp_attached(ap)) |
2695e366 | 1859 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
1860 | } |
1861 | ||
1862 | /** | |
1863 | * ata_eh_link_report - report error handling to user | |
0260731f | 1864 | * @link: ATA link EH is going on |
022bdb07 TH |
1865 | * |
1866 | * Report EH to user. | |
1867 | * | |
1868 | * LOCKING: | |
1869 | * None. | |
1870 | */ | |
9b1e2658 | 1871 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 1872 | { |
0260731f TH |
1873 | struct ata_port *ap = link->ap; |
1874 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 1875 | const char *frozen, *desc; |
a1e10f7e | 1876 | char tries_buf[6]; |
022bdb07 TH |
1877 | int tag, nr_failed = 0; |
1878 | ||
94ff3d54 TH |
1879 | if (ehc->i.flags & ATA_EHI_QUIET) |
1880 | return; | |
1881 | ||
022bdb07 TH |
1882 | desc = NULL; |
1883 | if (ehc->i.desc[0] != '\0') | |
1884 | desc = ehc->i.desc; | |
1885 | ||
1886 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1887 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1888 | ||
e027bd36 TH |
1889 | if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link || |
1890 | ((qc->flags & ATA_QCFLAG_QUIET) && | |
1891 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
1892 | continue; |
1893 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
1894 | continue; | |
1895 | ||
1896 | nr_failed++; | |
1897 | } | |
1898 | ||
1899 | if (!nr_failed && !ehc->i.err_mask) | |
1900 | return; | |
1901 | ||
1902 | frozen = ""; | |
b51e9e5d | 1903 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
1904 | frozen = " frozen"; |
1905 | ||
a1e10f7e TH |
1906 | memset(tries_buf, 0, sizeof(tries_buf)); |
1907 | if (ap->eh_tries < ATA_EH_MAX_TRIES) | |
1908 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", | |
1909 | ap->eh_tries); | |
1910 | ||
022bdb07 | 1911 | if (ehc->i.dev) { |
e8ee8451 | 1912 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
1913 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
1914 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
1915 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 1916 | if (desc) |
b64bbc39 | 1917 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
022bdb07 | 1918 | } else { |
0260731f | 1919 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
1920 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
1921 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
1922 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 1923 | if (desc) |
0260731f | 1924 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
022bdb07 TH |
1925 | } |
1926 | ||
1333e194 RH |
1927 | if (ehc->i.serror) |
1928 | ata_port_printk(ap, KERN_ERR, | |
1929 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", | |
1930 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
1931 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
1932 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
1933 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
1934 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
1935 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
1936 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
1937 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
1938 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
1939 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
1940 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
1941 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
1942 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
1943 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
1944 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
1945 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 1946 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
1333e194 | 1947 | |
022bdb07 TH |
1948 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
1949 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 1950 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
1951 | const u8 *cdb = qc->cdb; |
1952 | char data_buf[20] = ""; | |
1953 | char cdb_buf[70] = ""; | |
022bdb07 | 1954 | |
0260731f TH |
1955 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
1956 | qc->dev->link != link || !qc->err_mask) | |
022bdb07 TH |
1957 | continue; |
1958 | ||
abb6a889 TH |
1959 | if (qc->dma_dir != DMA_NONE) { |
1960 | static const char *dma_str[] = { | |
1961 | [DMA_BIDIRECTIONAL] = "bidi", | |
1962 | [DMA_TO_DEVICE] = "out", | |
1963 | [DMA_FROM_DEVICE] = "in", | |
1964 | }; | |
1965 | static const char *prot_str[] = { | |
1966 | [ATA_PROT_PIO] = "pio", | |
1967 | [ATA_PROT_DMA] = "dma", | |
1968 | [ATA_PROT_NCQ] = "ncq", | |
0dc36888 TH |
1969 | [ATAPI_PROT_PIO] = "pio", |
1970 | [ATAPI_PROT_DMA] = "dma", | |
abb6a889 TH |
1971 | }; |
1972 | ||
1973 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", | |
1974 | prot_str[qc->tf.protocol], qc->nbytes, | |
1975 | dma_str[qc->dma_dir]); | |
1976 | } | |
1977 | ||
e39eec13 | 1978 | if (ata_is_atapi(qc->tf.protocol)) |
abb6a889 TH |
1979 | snprintf(cdb_buf, sizeof(cdb_buf), |
1980 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " | |
1981 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", | |
1982 | cdb[0], cdb[1], cdb[2], cdb[3], | |
1983 | cdb[4], cdb[5], cdb[6], cdb[7], | |
1984 | cdb[8], cdb[9], cdb[10], cdb[11], | |
1985 | cdb[12], cdb[13], cdb[14], cdb[15]); | |
1986 | ||
8a937581 TH |
1987 | ata_dev_printk(qc->dev, KERN_ERR, |
1988 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " | |
abb6a889 | 1989 | "tag %d%s\n %s" |
8a937581 | 1990 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 1991 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
1992 | cmd->command, cmd->feature, cmd->nsect, |
1993 | cmd->lbal, cmd->lbam, cmd->lbah, | |
1994 | cmd->hob_feature, cmd->hob_nsect, | |
1995 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 1996 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
1997 | res->command, res->feature, res->nsect, |
1998 | res->lbal, res->lbam, res->lbah, | |
1999 | res->hob_feature, res->hob_nsect, | |
2000 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2001 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2002 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 RH |
2003 | |
2004 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | | |
2dcb407e | 2005 | ATA_ERR)) { |
1333e194 RH |
2006 | if (res->command & ATA_BUSY) |
2007 | ata_dev_printk(qc->dev, KERN_ERR, | |
2dcb407e | 2008 | "status: { Busy }\n"); |
1333e194 RH |
2009 | else |
2010 | ata_dev_printk(qc->dev, KERN_ERR, | |
2011 | "status: { %s%s%s%s}\n", | |
2012 | res->command & ATA_DRDY ? "DRDY " : "", | |
2013 | res->command & ATA_DF ? "DF " : "", | |
2014 | res->command & ATA_DRQ ? "DRQ " : "", | |
2dcb407e | 2015 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2016 | } |
2017 | ||
2018 | if (cmd->command != ATA_CMD_PACKET && | |
2019 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | | |
2020 | ATA_ABORTED))) | |
2021 | ata_dev_printk(qc->dev, KERN_ERR, | |
2022 | "error: { %s%s%s%s}\n", | |
2023 | res->feature & ATA_ICRC ? "ICRC " : "", | |
2024 | res->feature & ATA_UNC ? "UNC " : "", | |
2025 | res->feature & ATA_IDNF ? "IDNF " : "", | |
2dcb407e | 2026 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
022bdb07 TH |
2027 | } |
2028 | } | |
2029 | ||
9b1e2658 TH |
2030 | /** |
2031 | * ata_eh_report - report error handling to user | |
2032 | * @ap: ATA port to report EH about | |
2033 | * | |
2034 | * Report EH to user. | |
2035 | * | |
2036 | * LOCKING: | |
2037 | * None. | |
2038 | */ | |
fb7fd614 | 2039 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2040 | { |
2041 | struct ata_link *link; | |
2042 | ||
2043 | __ata_port_for_each_link(link, ap) | |
2044 | ata_eh_link_report(link); | |
2045 | } | |
2046 | ||
cc0680a5 | 2047 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
d4b2bab4 | 2048 | unsigned int *classes, unsigned long deadline) |
d87fa38e | 2049 | { |
f58229f8 | 2050 | struct ata_device *dev; |
d87fa38e | 2051 | |
cc0680a5 | 2052 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2053 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2054 | |
f046519f | 2055 | return reset(link, classes, deadline); |
d87fa38e TH |
2056 | } |
2057 | ||
ae791c05 TH |
2058 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
2059 | int rc, int classify, | |
664faf09 TH |
2060 | const unsigned int *classes) |
2061 | { | |
45db2f6c | 2062 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2063 | return 0; |
305d2a1a TH |
2064 | if (rc == -EAGAIN) { |
2065 | if (classify) | |
2066 | return 1; | |
2067 | rc = 0; | |
2068 | } | |
664faf09 TH |
2069 | if (rc != 0) |
2070 | return 0; | |
071f44b1 | 2071 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2072 | return 1; |
664faf09 TH |
2073 | return 0; |
2074 | } | |
2075 | ||
fb7fd614 TH |
2076 | int ata_eh_reset(struct ata_link *link, int classify, |
2077 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2078 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2079 | { |
afaa5c37 | 2080 | struct ata_port *ap = link->ap; |
936fd732 | 2081 | struct ata_eh_context *ehc = &link->eh_context; |
664faf09 | 2082 | unsigned int *classes = ehc->classes; |
416dc9ed | 2083 | unsigned int lflags = link->flags; |
1cdaf534 | 2084 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2085 | int max_tries = 0, try = 0; |
f58229f8 | 2086 | struct ata_device *dev; |
416dc9ed | 2087 | unsigned long deadline, now; |
022bdb07 | 2088 | ata_reset_fn_t reset; |
afaa5c37 | 2089 | unsigned long flags; |
416dc9ed | 2090 | u32 sstatus; |
f046519f | 2091 | int nr_known, rc; |
022bdb07 | 2092 | |
932648b0 TH |
2093 | /* |
2094 | * Prepare to reset | |
2095 | */ | |
d8af0eb6 TH |
2096 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2097 | max_tries++; | |
2098 | ||
0a2c0f56 TH |
2099 | now = jiffies; |
2100 | deadline = ata_deadline(ehc->last_reset, ATA_EH_RESET_COOL_DOWN); | |
2101 | if (time_before(now, deadline)) | |
2102 | schedule_timeout_uninterruptible(deadline - now); | |
2103 | ||
afaa5c37 TH |
2104 | spin_lock_irqsave(ap->lock, flags); |
2105 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2106 | spin_unlock_irqrestore(ap->lock, flags); | |
2107 | ||
cf480626 | 2108 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
0a2c0f56 | 2109 | ehc->last_reset = jiffies; |
13abf50d | 2110 | |
cdeab114 TH |
2111 | ata_link_for_each_dev(dev, link) { |
2112 | /* If we issue an SRST then an ATA drive (not ATAPI) | |
2113 | * may change configuration and be in PIO0 timing. If | |
2114 | * we do a hard reset (or are coming from power on) | |
2115 | * this is true for ATA or ATAPI. Until we've set a | |
2116 | * suitable controller mode we should not touch the | |
2117 | * bus as we may be talking too fast. | |
2118 | */ | |
2119 | dev->pio_mode = XFER_PIO_0; | |
2120 | ||
2121 | /* If the controller has a pio mode setup function | |
2122 | * then use it to set the chipset to rights. Don't | |
2123 | * touch the DMA setup as that will be dealt with when | |
2124 | * configuring devices. | |
2125 | */ | |
2126 | if (ap->ops->set_piomode) | |
2127 | ap->ops->set_piomode(ap, dev); | |
2128 | } | |
2129 | ||
cf480626 | 2130 | /* prefer hardreset */ |
932648b0 | 2131 | reset = NULL; |
cf480626 TH |
2132 | ehc->i.action &= ~ATA_EH_RESET; |
2133 | if (hardreset) { | |
2134 | reset = hardreset; | |
2135 | ehc->i.action = ATA_EH_HARDRESET; | |
4f7faa3f | 2136 | } else if (softreset) { |
cf480626 TH |
2137 | reset = softreset; |
2138 | ehc->i.action = ATA_EH_SOFTRESET; | |
2139 | } | |
f5914a46 TH |
2140 | |
2141 | if (prereset) { | |
341c2c95 TH |
2142 | rc = prereset(link, |
2143 | ata_deadline(jiffies, ATA_EH_PRERESET_TIMEOUT)); | |
f5914a46 | 2144 | if (rc) { |
c961922b | 2145 | if (rc == -ENOENT) { |
cc0680a5 | 2146 | ata_link_printk(link, KERN_DEBUG, |
4aa9ab67 | 2147 | "port disabled. ignoring.\n"); |
cf480626 | 2148 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2149 | |
936fd732 | 2150 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2151 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2152 | |
2153 | rc = 0; | |
c961922b | 2154 | } else |
cc0680a5 | 2155 | ata_link_printk(link, KERN_ERR, |
f5914a46 | 2156 | "prereset failed (errno=%d)\n", rc); |
fccb6ea5 | 2157 | goto out; |
f5914a46 | 2158 | } |
f5914a46 | 2159 | |
932648b0 TH |
2160 | /* prereset() might have cleared ATA_EH_RESET. If so, |
2161 | * bang classes and return. | |
2162 | */ | |
2163 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
2164 | ata_link_for_each_dev(dev, link) | |
2165 | classes[dev->devno] = ATA_DEV_NONE; | |
2166 | rc = 0; | |
2167 | goto out; | |
2168 | } | |
f5914a46 TH |
2169 | } |
2170 | ||
022bdb07 | 2171 | retry: |
932648b0 TH |
2172 | /* |
2173 | * Perform reset | |
2174 | */ | |
0a2c0f56 | 2175 | ehc->last_reset = jiffies; |
dc98c32c TH |
2176 | if (ata_is_host_link(link)) |
2177 | ata_eh_freeze_port(ap); | |
2178 | ||
341c2c95 | 2179 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2180 | |
932648b0 TH |
2181 | if (reset) { |
2182 | if (verbose) | |
2183 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", | |
2184 | reset == softreset ? "soft" : "hard"); | |
2185 | ||
2186 | /* mark that this EH session started with reset */ | |
2187 | if (reset == hardreset) | |
2188 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2189 | else | |
2190 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2191 | |
932648b0 | 2192 | rc = ata_do_reset(link, reset, classes, deadline); |
022bdb07 | 2193 | |
932648b0 TH |
2194 | if (reset == hardreset && |
2195 | ata_eh_followup_srst_needed(link, rc, classify, classes)) { | |
2196 | /* okay, let's do follow-up softreset */ | |
2197 | reset = softreset; | |
022bdb07 | 2198 | |
932648b0 TH |
2199 | if (!reset) { |
2200 | ata_link_printk(link, KERN_ERR, | |
2201 | "follow-up softreset required " | |
2202 | "but no softreset avaliable\n"); | |
2203 | rc = -EINVAL; | |
2204 | goto fail; | |
2205 | } | |
664faf09 | 2206 | |
932648b0 TH |
2207 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
2208 | rc = ata_do_reset(link, reset, classes, deadline); | |
664faf09 TH |
2209 | } |
2210 | ||
932648b0 TH |
2211 | /* -EAGAIN can happen if we skipped followup SRST */ |
2212 | if (rc && rc != -EAGAIN) | |
2213 | goto fail; | |
2214 | } else { | |
2215 | if (verbose) | |
2216 | ata_link_printk(link, KERN_INFO, "no reset method " | |
2217 | "available, skipping reset\n"); | |
2218 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) | |
2219 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2220 | } |
2221 | ||
932648b0 TH |
2222 | /* |
2223 | * Post-reset processing | |
2224 | */ | |
416dc9ed TH |
2225 | ata_link_for_each_dev(dev, link) { |
2226 | /* After the reset, the device state is PIO 0 and the | |
2227 | * controller state is undefined. Reset also wakes up | |
2228 | * drives from sleeping mode. | |
2229 | */ | |
2230 | dev->pio_mode = XFER_PIO_0; | |
2231 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2232 | |
416dc9ed TH |
2233 | if (ata_link_offline(link)) |
2234 | continue; | |
022bdb07 | 2235 | |
4ccd3329 | 2236 | /* apply class override */ |
416dc9ed TH |
2237 | if (lflags & ATA_LFLAG_ASSUME_ATA) |
2238 | classes[dev->devno] = ATA_DEV_ATA; | |
2239 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2240 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; /* not yet */ | |
022bdb07 TH |
2241 | } |
2242 | ||
416dc9ed TH |
2243 | /* record current link speed */ |
2244 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2245 | link->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2246 | |
dc98c32c TH |
2247 | /* thaw the port */ |
2248 | if (ata_is_host_link(link)) | |
2249 | ata_eh_thaw_port(ap); | |
2250 | ||
f046519f TH |
2251 | /* postreset() should clear hardware SError. Although SError |
2252 | * is cleared during link resume, clearing SError here is | |
2253 | * necessary as some PHYs raise hotplug events after SRST. | |
2254 | * This introduces race condition where hotplug occurs between | |
2255 | * reset and here. This race is mediated by cross checking | |
2256 | * link onlineness and classification result later. | |
2257 | */ | |
416dc9ed TH |
2258 | if (postreset) |
2259 | postreset(link, classes); | |
20952b69 | 2260 | |
f046519f TH |
2261 | /* clear cached SError */ |
2262 | spin_lock_irqsave(link->ap->lock, flags); | |
2263 | link->eh_info.serror = 0; | |
2264 | spin_unlock_irqrestore(link->ap->lock, flags); | |
2265 | ||
2266 | /* Make sure onlineness and classification result correspond. | |
2267 | * Hotplug could have happened during reset and some | |
2268 | * controllers fail to wait while a drive is spinning up after | |
2269 | * being hotplugged causing misdetection. By cross checking | |
2270 | * link onlineness and classification result, those conditions | |
2271 | * can be reliably detected and retried. | |
2272 | */ | |
2273 | nr_known = 0; | |
2274 | ata_link_for_each_dev(dev, link) { | |
2275 | /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */ | |
2276 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) | |
2277 | classes[dev->devno] = ATA_DEV_NONE; | |
2278 | else | |
2279 | nr_known++; | |
2280 | } | |
2281 | ||
2282 | if (classify && !nr_known && ata_link_online(link)) { | |
2283 | if (try < max_tries) { | |
2284 | ata_link_printk(link, KERN_WARNING, "link online but " | |
2285 | "device misclassified, retrying\n"); | |
2286 | rc = -EAGAIN; | |
2287 | goto fail; | |
2288 | } | |
2289 | ata_link_printk(link, KERN_WARNING, | |
2290 | "link online but device misclassified, " | |
2291 | "device detection might fail\n"); | |
2292 | } | |
2293 | ||
416dc9ed | 2294 | /* reset successful, schedule revalidation */ |
cf480626 | 2295 | ata_eh_done(link, NULL, ATA_EH_RESET); |
0a2c0f56 | 2296 | ehc->last_reset = jiffies; |
416dc9ed | 2297 | ehc->i.action |= ATA_EH_REVALIDATE; |
ae791c05 | 2298 | |
416dc9ed | 2299 | rc = 0; |
fccb6ea5 TH |
2300 | out: |
2301 | /* clear hotplug flag */ | |
2302 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2303 | |
2304 | spin_lock_irqsave(ap->lock, flags); | |
2305 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2306 | spin_unlock_irqrestore(ap->lock, flags); | |
2307 | ||
022bdb07 | 2308 | return rc; |
416dc9ed TH |
2309 | |
2310 | fail: | |
5958e302 TH |
2311 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2312 | if (!ata_is_host_link(link) && | |
2313 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2314 | rc = -ERESTART; | |
2315 | ||
416dc9ed TH |
2316 | if (rc == -ERESTART || try >= max_tries) |
2317 | goto out; | |
2318 | ||
2319 | now = jiffies; | |
2320 | if (time_before(now, deadline)) { | |
2321 | unsigned long delta = deadline - now; | |
2322 | ||
0a2c0f56 TH |
2323 | ata_link_printk(link, KERN_WARNING, |
2324 | "reset failed (errno=%d), retrying in %u secs\n", | |
2325 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed TH |
2326 | |
2327 | while (delta) | |
2328 | delta = schedule_timeout_uninterruptible(delta); | |
2329 | } | |
2330 | ||
2331 | if (rc == -EPIPE || try == max_tries - 1) | |
2332 | sata_down_spd_limit(link); | |
2333 | if (hardreset) | |
2334 | reset = hardreset; | |
2335 | goto retry; | |
022bdb07 TH |
2336 | } |
2337 | ||
0260731f | 2338 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2339 | struct ata_device **r_failed_dev) |
022bdb07 | 2340 | { |
0260731f TH |
2341 | struct ata_port *ap = link->ap; |
2342 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2343 | struct ata_device *dev; |
8c3c52a8 | 2344 | unsigned int new_mask = 0; |
084fe639 | 2345 | unsigned long flags; |
f58229f8 | 2346 | int rc = 0; |
022bdb07 TH |
2347 | |
2348 | DPRINTK("ENTER\n"); | |
2349 | ||
8c3c52a8 TH |
2350 | /* For PATA drive side cable detection to work, IDENTIFY must |
2351 | * be done backwards such that PDIAG- is released by the slave | |
2352 | * device before the master device is identified. | |
2353 | */ | |
0260731f | 2354 | ata_link_for_each_dev_reverse(dev, link) { |
f58229f8 TH |
2355 | unsigned int action = ata_eh_dev_action(dev); |
2356 | unsigned int readid_flags = 0; | |
022bdb07 | 2357 | |
bff04647 TH |
2358 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2359 | readid_flags |= ATA_READID_POSTRESET; | |
2360 | ||
9666f400 | 2361 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2362 | WARN_ON(dev->class == ATA_DEV_PMP); |
2363 | ||
0260731f | 2364 | if (ata_link_offline(link)) { |
022bdb07 | 2365 | rc = -EIO; |
8c3c52a8 | 2366 | goto err; |
022bdb07 TH |
2367 | } |
2368 | ||
0260731f | 2369 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2370 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2371 | readid_flags); | |
022bdb07 | 2372 | if (rc) |
8c3c52a8 | 2373 | goto err; |
022bdb07 | 2374 | |
0260731f | 2375 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2376 | |
baa1e78a TH |
2377 | /* Configuration may have changed, reconfigure |
2378 | * transfer mode. | |
2379 | */ | |
2380 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2381 | ||
3057ac3c | 2382 | /* schedule the scsi_rescan_device() here */ |
2383 | queue_work(ata_aux_wq, &(ap->scsi_rescan_task)); | |
084fe639 TH |
2384 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2385 | ehc->tries[dev->devno] && | |
2386 | ata_class_enabled(ehc->classes[dev->devno])) { | |
2387 | dev->class = ehc->classes[dev->devno]; | |
2388 | ||
633273a3 TH |
2389 | if (dev->class == ATA_DEV_PMP) |
2390 | rc = sata_pmp_attach(dev); | |
2391 | else | |
2392 | rc = ata_dev_read_id(dev, &dev->class, | |
2393 | readid_flags, dev->id); | |
8c3c52a8 TH |
2394 | switch (rc) { |
2395 | case 0: | |
f58229f8 | 2396 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2397 | break; |
2398 | case -ENOENT: | |
55a8e2c8 TH |
2399 | /* IDENTIFY was issued to non-existent |
2400 | * device. No need to reset. Just | |
2401 | * thaw and kill the device. | |
2402 | */ | |
2403 | ata_eh_thaw_port(ap); | |
084fe639 TH |
2404 | dev->class = ATA_DEV_UNKNOWN; |
2405 | break; | |
8c3c52a8 TH |
2406 | default: |
2407 | dev->class = ATA_DEV_UNKNOWN; | |
2408 | goto err; | |
084fe639 | 2409 | } |
8c3c52a8 TH |
2410 | } |
2411 | } | |
084fe639 | 2412 | |
c1c4e8d5 | 2413 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
2414 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
2415 | if (ap->ops->cable_detect) | |
2416 | ap->cbl = ap->ops->cable_detect(ap); | |
2417 | ata_force_cbl(ap); | |
2418 | } | |
c1c4e8d5 | 2419 | |
8c3c52a8 TH |
2420 | /* Configure new devices forward such that user doesn't see |
2421 | * device detection messages backwards. | |
2422 | */ | |
0260731f | 2423 | ata_link_for_each_dev(dev, link) { |
633273a3 TH |
2424 | if (!(new_mask & (1 << dev->devno)) || |
2425 | dev->class == ATA_DEV_PMP) | |
8c3c52a8 TH |
2426 | continue; |
2427 | ||
2428 | ehc->i.flags |= ATA_EHI_PRINTINFO; | |
2429 | rc = ata_dev_configure(dev); | |
2430 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
2431 | if (rc) | |
2432 | goto err; | |
2433 | ||
2434 | spin_lock_irqsave(ap->lock, flags); | |
2435 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
2436 | spin_unlock_irqrestore(ap->lock, flags); | |
2437 | ||
2438 | /* new device discovered, configure xfermode */ | |
2439 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
2440 | } |
2441 | ||
8c3c52a8 | 2442 | return 0; |
022bdb07 | 2443 | |
8c3c52a8 TH |
2444 | err: |
2445 | *r_failed_dev = dev; | |
2446 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
2447 | return rc; |
2448 | } | |
2449 | ||
6f1d1e3a TH |
2450 | /** |
2451 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2452 | * @link: link on which timings will be programmed | |
2453 | * @r_failed_dev: out paramter for failed device | |
2454 | * | |
2455 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2456 | * ata_set_mode() fails, pointer to the failing device is | |
2457 | * returned in @r_failed_dev. | |
2458 | * | |
2459 | * LOCKING: | |
2460 | * PCI/etc. bus probe sem. | |
2461 | * | |
2462 | * RETURNS: | |
2463 | * 0 on success, negative errno otherwise | |
2464 | */ | |
2465 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
2466 | { | |
2467 | struct ata_port *ap = link->ap; | |
00115e0f TH |
2468 | struct ata_device *dev; |
2469 | int rc; | |
6f1d1e3a | 2470 | |
76326ac1 TH |
2471 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
2472 | ata_link_for_each_dev(dev, link) { | |
2473 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { | |
2474 | struct ata_ering_entry *ent; | |
2475 | ||
2476 | ent = ata_ering_top(&dev->ering); | |
2477 | if (ent) | |
2478 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
2479 | } | |
2480 | } | |
2481 | ||
6f1d1e3a TH |
2482 | /* has private set_mode? */ |
2483 | if (ap->ops->set_mode) | |
00115e0f TH |
2484 | rc = ap->ops->set_mode(link, r_failed_dev); |
2485 | else | |
2486 | rc = ata_do_set_mode(link, r_failed_dev); | |
2487 | ||
2488 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
2489 | ata_link_for_each_dev(dev, link) { | |
2490 | struct ata_eh_context *ehc = &link->eh_context; | |
2491 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
2492 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
2493 | ||
2494 | if (dev->xfer_mode != saved_xfer_mode || | |
2495 | ata_ncq_enabled(dev) != saved_ncq) | |
2496 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
2497 | } | |
2498 | ||
2499 | return rc; | |
6f1d1e3a TH |
2500 | } |
2501 | ||
0260731f | 2502 | static int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 2503 | { |
f58229f8 TH |
2504 | struct ata_device *dev; |
2505 | int cnt = 0; | |
022bdb07 | 2506 | |
0260731f | 2507 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2508 | if (ata_dev_enabled(dev)) |
022bdb07 TH |
2509 | cnt++; |
2510 | return cnt; | |
2511 | } | |
2512 | ||
0260731f | 2513 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 2514 | { |
f58229f8 TH |
2515 | struct ata_device *dev; |
2516 | int cnt = 0; | |
084fe639 | 2517 | |
0260731f | 2518 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2519 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
2520 | cnt++; |
2521 | return cnt; | |
2522 | } | |
2523 | ||
0260731f | 2524 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 2525 | { |
672b2d65 | 2526 | struct ata_port *ap = link->ap; |
0260731f | 2527 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 2528 | struct ata_device *dev; |
084fe639 | 2529 | |
f9df58cb TH |
2530 | /* skip disabled links */ |
2531 | if (link->flags & ATA_LFLAG_DISABLED) | |
2532 | return 1; | |
2533 | ||
672b2d65 TH |
2534 | /* thaw frozen port and recover failed devices */ |
2535 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
2536 | return 0; | |
2537 | ||
2538 | /* reset at least once if reset is requested */ | |
2539 | if ((ehc->i.action & ATA_EH_RESET) && | |
2540 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
2541 | return 0; |
2542 | ||
2543 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
0260731f | 2544 | ata_link_for_each_dev(dev, link) { |
084fe639 TH |
2545 | if (dev->class == ATA_DEV_UNKNOWN && |
2546 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
2547 | return 0; | |
2548 | } | |
2549 | ||
2550 | return 1; | |
2551 | } | |
2552 | ||
02c05a27 TH |
2553 | static int ata_eh_schedule_probe(struct ata_device *dev) |
2554 | { | |
2555 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2556 | ||
2557 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
2558 | (ehc->did_probe_mask & (1 << dev->devno))) | |
2559 | return 0; | |
2560 | ||
2561 | ata_eh_detach_dev(dev); | |
2562 | ata_dev_init(dev); | |
2563 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 2564 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
2565 | ehc->saved_xfer_mode[dev->devno] = 0; |
2566 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 TH |
2567 | |
2568 | return 1; | |
2569 | } | |
2570 | ||
9b1e2658 | 2571 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 2572 | { |
9af5c9c9 | 2573 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 TH |
2574 | |
2575 | ehc->tries[dev->devno]--; | |
2576 | ||
2577 | switch (err) { | |
2578 | case -ENODEV: | |
2579 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
2580 | ehc->i.probe_mask |= (1 << dev->devno); | |
2581 | case -EINVAL: | |
2582 | /* give it just one more chance */ | |
2583 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
2584 | case -EIO: | |
4fb4615b | 2585 | if (ehc->tries[dev->devno] == 1 && dev->pio_mode > XFER_PIO_0) { |
fee7ca72 TH |
2586 | /* This is the last chance, better to slow |
2587 | * down than lose it. | |
2588 | */ | |
936fd732 | 2589 | sata_down_spd_limit(dev->link); |
fee7ca72 TH |
2590 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2591 | } | |
2592 | } | |
2593 | ||
2594 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
2595 | /* disable device if it has used up all its chances */ | |
2596 | ata_dev_disable(dev); | |
2597 | ||
2598 | /* detach if offline */ | |
936fd732 | 2599 | if (ata_link_offline(dev->link)) |
fee7ca72 TH |
2600 | ata_eh_detach_dev(dev); |
2601 | ||
02c05a27 TH |
2602 | /* schedule probe if necessary */ |
2603 | if (ata_eh_schedule_probe(dev)) | |
fee7ca72 | 2604 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
9b1e2658 TH |
2605 | |
2606 | return 1; | |
fee7ca72 | 2607 | } else { |
cf480626 | 2608 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 2609 | return 0; |
fee7ca72 TH |
2610 | } |
2611 | } | |
2612 | ||
022bdb07 TH |
2613 | /** |
2614 | * ata_eh_recover - recover host port after error | |
2615 | * @ap: host port to recover | |
f5914a46 | 2616 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
2617 | * @softreset: softreset method (can be NULL) |
2618 | * @hardreset: hardreset method (can be NULL) | |
2619 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 2620 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
2621 | * |
2622 | * This is the alpha and omega, eum and yang, heart and soul of | |
2623 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
2624 | * recover each link and hotplug requests are recorded in the |
2625 | * link's eh_context. This function executes all the operations | |
2626 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 2627 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
2628 | * |
2629 | * LOCKING: | |
2630 | * Kernel thread context (may sleep). | |
2631 | * | |
2632 | * RETURNS: | |
2633 | * 0 on success, -errno on failure. | |
2634 | */ | |
fb7fd614 TH |
2635 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
2636 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
2637 | ata_postreset_fn_t postreset, | |
2638 | struct ata_link **r_failed_link) | |
022bdb07 | 2639 | { |
9b1e2658 | 2640 | struct ata_link *link; |
022bdb07 | 2641 | struct ata_device *dev; |
0a2c0f56 | 2642 | int nr_failed_devs; |
dc98c32c | 2643 | int rc; |
f9df58cb | 2644 | unsigned long flags; |
022bdb07 TH |
2645 | |
2646 | DPRINTK("ENTER\n"); | |
2647 | ||
2648 | /* prep for recovery */ | |
9b1e2658 TH |
2649 | ata_port_for_each_link(link, ap) { |
2650 | struct ata_eh_context *ehc = &link->eh_context; | |
084fe639 | 2651 | |
f9df58cb TH |
2652 | /* re-enable link? */ |
2653 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
2654 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
2655 | spin_lock_irqsave(ap->lock, flags); | |
2656 | link->flags &= ~ATA_LFLAG_DISABLED; | |
2657 | spin_unlock_irqrestore(ap->lock, flags); | |
2658 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
2659 | } | |
2660 | ||
9b1e2658 | 2661 | ata_link_for_each_dev(dev, link) { |
fd995f70 TH |
2662 | if (link->flags & ATA_LFLAG_NO_RETRY) |
2663 | ehc->tries[dev->devno] = 1; | |
2664 | else | |
2665 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 2666 | |
9b1e2658 TH |
2667 | /* collect port action mask recorded in dev actions */ |
2668 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
2669 | ~ATA_EH_PERDEV_MASK; | |
2670 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
2671 | ||
2672 | /* process hotplug request */ | |
2673 | if (dev->flags & ATA_DFLAG_DETACH) | |
2674 | ata_eh_detach_dev(dev); | |
2675 | ||
02c05a27 TH |
2676 | /* schedule probe if necessary */ |
2677 | if (!ata_dev_enabled(dev)) | |
2678 | ata_eh_schedule_probe(dev); | |
084fe639 | 2679 | } |
022bdb07 TH |
2680 | } |
2681 | ||
2682 | retry: | |
022bdb07 | 2683 | rc = 0; |
9b1e2658 | 2684 | nr_failed_devs = 0; |
022bdb07 | 2685 | |
aeb2ecd6 | 2686 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 2687 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
2688 | goto out; |
2689 | ||
9b1e2658 TH |
2690 | /* prep for EH */ |
2691 | ata_port_for_each_link(link, ap) { | |
2692 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2693 | |
9b1e2658 TH |
2694 | /* skip EH if possible. */ |
2695 | if (ata_eh_skip_recovery(link)) | |
2696 | ehc->i.action = 0; | |
2697 | ||
9b1e2658 TH |
2698 | ata_link_for_each_dev(dev, link) |
2699 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; | |
2700 | } | |
084fe639 | 2701 | |
022bdb07 | 2702 | /* reset */ |
dc98c32c TH |
2703 | ata_port_for_each_link(link, ap) { |
2704 | struct ata_eh_context *ehc = &link->eh_context; | |
9b1e2658 | 2705 | |
dc98c32c TH |
2706 | if (!(ehc->i.action & ATA_EH_RESET)) |
2707 | continue; | |
9b1e2658 | 2708 | |
dc98c32c TH |
2709 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
2710 | prereset, softreset, hardreset, postreset); | |
2711 | if (rc) { | |
2712 | ata_link_printk(link, KERN_ERR, | |
2713 | "reset failed, giving up\n"); | |
2714 | goto out; | |
022bdb07 | 2715 | } |
022bdb07 TH |
2716 | } |
2717 | ||
9b1e2658 TH |
2718 | /* the rest */ |
2719 | ata_port_for_each_link(link, ap) { | |
2720 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2721 | |
9b1e2658 TH |
2722 | /* revalidate existing devices and attach new ones */ |
2723 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 2724 | if (rc) |
022bdb07 | 2725 | goto dev_fail; |
022bdb07 | 2726 | |
633273a3 TH |
2727 | /* if PMP got attached, return, pmp EH will take care of it */ |
2728 | if (link->device->class == ATA_DEV_PMP) { | |
2729 | ehc->i.action = 0; | |
2730 | return 0; | |
2731 | } | |
2732 | ||
9b1e2658 TH |
2733 | /* configure transfer mode if necessary */ |
2734 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
2735 | rc = ata_set_mode(link, &dev); | |
2736 | if (rc) | |
2737 | goto dev_fail; | |
2738 | ehc->i.flags &= ~ATA_EHI_SETMODE; | |
2739 | } | |
2740 | ||
3ec25ebd | 2741 | if (ehc->i.action & ATA_EH_LPM) |
ca77329f KCA |
2742 | ata_link_for_each_dev(dev, link) |
2743 | ata_dev_enable_pm(dev, ap->pm_policy); | |
2744 | ||
9b1e2658 TH |
2745 | /* this link is okay now */ |
2746 | ehc->i.flags = 0; | |
2747 | continue; | |
022bdb07 | 2748 | |
2dcb407e | 2749 | dev_fail: |
9b1e2658 | 2750 | nr_failed_devs++; |
0a2c0f56 | 2751 | ata_eh_handle_dev_fail(dev, rc); |
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 | */ | |
071f44b1 | 2757 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 2758 | goto out; |
9b1e2658 | 2759 | break; |
b06ce3e5 | 2760 | } |
022bdb07 TH |
2761 | } |
2762 | ||
0a2c0f56 | 2763 | if (nr_failed_devs) |
9b1e2658 | 2764 | goto retry; |
022bdb07 | 2765 | |
9b1e2658 TH |
2766 | out: |
2767 | if (rc && r_failed_link) | |
2768 | *r_failed_link = link; | |
2769 | ||
022bdb07 TH |
2770 | DPRINTK("EXIT, rc=%d\n", rc); |
2771 | return rc; | |
2772 | } | |
2773 | ||
2774 | /** | |
2775 | * ata_eh_finish - finish up EH | |
2776 | * @ap: host port to finish EH for | |
2777 | * | |
2778 | * Recovery is complete. Clean up EH states and retry or finish | |
2779 | * failed qcs. | |
2780 | * | |
2781 | * LOCKING: | |
2782 | * None. | |
2783 | */ | |
fb7fd614 | 2784 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
2785 | { |
2786 | int tag; | |
2787 | ||
2788 | /* retry or finish qcs */ | |
2789 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2790 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2791 | ||
2792 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
2793 | continue; | |
2794 | ||
2795 | if (qc->err_mask) { | |
2796 | /* FIXME: Once EH migration is complete, | |
2797 | * generate sense data in this function, | |
2798 | * considering both err_mask and tf. | |
2799 | */ | |
03faab78 | 2800 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 2801 | ata_eh_qc_retry(qc); |
03faab78 TH |
2802 | else |
2803 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
2804 | } else { |
2805 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
2806 | ata_eh_qc_complete(qc); | |
2807 | } else { | |
2808 | /* feed zero TF to sense generation */ | |
2809 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
2810 | ata_eh_qc_retry(qc); | |
2811 | } | |
2812 | } | |
2813 | } | |
da917d69 TH |
2814 | |
2815 | /* make sure nr_active_links is zero after EH */ | |
2816 | WARN_ON(ap->nr_active_links); | |
2817 | ap->nr_active_links = 0; | |
022bdb07 TH |
2818 | } |
2819 | ||
2820 | /** | |
2821 | * ata_do_eh - do standard error handling | |
2822 | * @ap: host port to handle error for | |
a1efdaba | 2823 | * |
f5914a46 | 2824 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
2825 | * @softreset: softreset method (can be NULL) |
2826 | * @hardreset: hardreset method (can be NULL) | |
2827 | * @postreset: postreset method (can be NULL) | |
2828 | * | |
2829 | * Perform standard error handling sequence. | |
2830 | * | |
2831 | * LOCKING: | |
2832 | * Kernel thread context (may sleep). | |
2833 | */ | |
f5914a46 TH |
2834 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
2835 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
2836 | ata_postreset_fn_t postreset) | |
022bdb07 | 2837 | { |
9b1e2658 TH |
2838 | struct ata_device *dev; |
2839 | int rc; | |
2840 | ||
2841 | ata_eh_autopsy(ap); | |
2842 | ata_eh_report(ap); | |
2843 | ||
2844 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
2845 | NULL); | |
2846 | if (rc) { | |
2847 | ata_link_for_each_dev(dev, &ap->link) | |
2848 | ata_dev_disable(dev); | |
2849 | } | |
2850 | ||
022bdb07 TH |
2851 | ata_eh_finish(ap); |
2852 | } | |
500530f6 | 2853 | |
a1efdaba TH |
2854 | /** |
2855 | * ata_std_error_handler - standard error handler | |
2856 | * @ap: host port to handle error for | |
2857 | * | |
2858 | * Standard error handler | |
2859 | * | |
2860 | * LOCKING: | |
2861 | * Kernel thread context (may sleep). | |
2862 | */ | |
2863 | void ata_std_error_handler(struct ata_port *ap) | |
2864 | { | |
2865 | struct ata_port_operations *ops = ap->ops; | |
2866 | ata_reset_fn_t hardreset = ops->hardreset; | |
2867 | ||
57c9efdf TH |
2868 | /* ignore built-in hardreset if SCR access is not available */ |
2869 | if (ata_is_builtin_hardreset(hardreset) && !sata_scr_valid(&ap->link)) | |
a1efdaba TH |
2870 | hardreset = NULL; |
2871 | ||
2872 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
2873 | } | |
2874 | ||
6ffa01d8 | 2875 | #ifdef CONFIG_PM |
500530f6 TH |
2876 | /** |
2877 | * ata_eh_handle_port_suspend - perform port suspend operation | |
2878 | * @ap: port to suspend | |
2879 | * | |
2880 | * Suspend @ap. | |
2881 | * | |
2882 | * LOCKING: | |
2883 | * Kernel thread context (may sleep). | |
2884 | */ | |
2885 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
2886 | { | |
2887 | unsigned long flags; | |
2888 | int rc = 0; | |
2889 | ||
2890 | /* are we suspending? */ | |
2891 | spin_lock_irqsave(ap->lock, flags); | |
2892 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
2893 | ap->pm_mesg.event == PM_EVENT_ON) { | |
2894 | spin_unlock_irqrestore(ap->lock, flags); | |
2895 | return; | |
2896 | } | |
2897 | spin_unlock_irqrestore(ap->lock, flags); | |
2898 | ||
2899 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
2900 | ||
64578a3d TH |
2901 | /* tell ACPI we're suspending */ |
2902 | rc = ata_acpi_on_suspend(ap); | |
2903 | if (rc) | |
2904 | goto out; | |
2905 | ||
500530f6 TH |
2906 | /* suspend */ |
2907 | ata_eh_freeze_port(ap); | |
2908 | ||
2909 | if (ap->ops->port_suspend) | |
2910 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
2911 | ||
bd3adca5 | 2912 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
64578a3d | 2913 | out: |
500530f6 TH |
2914 | /* report result */ |
2915 | spin_lock_irqsave(ap->lock, flags); | |
2916 | ||
2917 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
2918 | if (rc == 0) | |
2919 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 2920 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
2921 | ata_port_schedule_eh(ap); |
2922 | ||
2923 | if (ap->pm_result) { | |
2924 | *ap->pm_result = rc; | |
2925 | ap->pm_result = NULL; | |
2926 | } | |
2927 | ||
2928 | spin_unlock_irqrestore(ap->lock, flags); | |
2929 | ||
2930 | return; | |
2931 | } | |
2932 | ||
2933 | /** | |
2934 | * ata_eh_handle_port_resume - perform port resume operation | |
2935 | * @ap: port to resume | |
2936 | * | |
2937 | * Resume @ap. | |
2938 | * | |
500530f6 TH |
2939 | * LOCKING: |
2940 | * Kernel thread context (may sleep). | |
2941 | */ | |
2942 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
2943 | { | |
500530f6 | 2944 | unsigned long flags; |
9666f400 | 2945 | int rc = 0; |
500530f6 TH |
2946 | |
2947 | /* are we resuming? */ | |
2948 | spin_lock_irqsave(ap->lock, flags); | |
2949 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
2950 | ap->pm_mesg.event != PM_EVENT_ON) { | |
2951 | spin_unlock_irqrestore(ap->lock, flags); | |
2952 | return; | |
2953 | } | |
2954 | spin_unlock_irqrestore(ap->lock, flags); | |
2955 | ||
9666f400 | 2956 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 2957 | |
bd3adca5 SL |
2958 | ata_acpi_set_state(ap, PMSG_ON); |
2959 | ||
500530f6 TH |
2960 | if (ap->ops->port_resume) |
2961 | rc = ap->ops->port_resume(ap); | |
2962 | ||
6746544c TH |
2963 | /* tell ACPI that we're resuming */ |
2964 | ata_acpi_on_resume(ap); | |
2965 | ||
9666f400 | 2966 | /* report result */ |
500530f6 TH |
2967 | spin_lock_irqsave(ap->lock, flags); |
2968 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
2969 | if (ap->pm_result) { | |
2970 | *ap->pm_result = rc; | |
2971 | ap->pm_result = NULL; | |
2972 | } | |
2973 | spin_unlock_irqrestore(ap->lock, flags); | |
2974 | } | |
6ffa01d8 | 2975 | #endif /* CONFIG_PM */ |