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