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ece1d636 TH |
1 | /* |
2 | * libata-eh.c - libata error handling | |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2006 Tejun Heo <htejun@gmail.com> | |
9 | * | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License as | |
13 | * published by the Free Software Foundation; either version 2, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; see the file COPYING. If not, write to | |
23 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, | |
24 | * USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
33 | */ | |
34 | ||
ece1d636 | 35 | #include <linux/kernel.h> |
242f9dcb | 36 | #include <linux/blkdev.h> |
2855568b | 37 | #include <linux/pci.h> |
ece1d636 TH |
38 | #include <scsi/scsi.h> |
39 | #include <scsi/scsi_host.h> | |
40 | #include <scsi/scsi_eh.h> | |
41 | #include <scsi/scsi_device.h> | |
42 | #include <scsi/scsi_cmnd.h> | |
c6fd2807 | 43 | #include "../scsi/scsi_transport_api.h" |
ece1d636 TH |
44 | |
45 | #include <linux/libata.h> | |
46 | ||
47 | #include "libata.h" | |
48 | ||
7d47e8d4 | 49 | enum { |
3884f7b0 | 50 | /* speed down verdicts */ |
7d47e8d4 TH |
51 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
52 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
53 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 54 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
55 | |
56 | /* error flags */ | |
57 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 58 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
3884f7b0 TH |
59 | |
60 | /* error categories */ | |
61 | ATA_ECAT_NONE = 0, | |
62 | ATA_ECAT_ATA_BUS = 1, | |
63 | ATA_ECAT_TOUT_HSM = 2, | |
64 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
65 | ATA_ECAT_DUBIOUS_NONE = 4, |
66 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
67 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
68 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
69 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 70 | |
87fbc5a0 TH |
71 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
72 | ||
0a2c0f56 TH |
73 | /* always put at least this amount of time between resets */ |
74 | ATA_EH_RESET_COOL_DOWN = 5000, | |
75 | ||
341c2c95 TH |
76 | /* Waiting in ->prereset can never be reliable. It's |
77 | * sometimes nice to wait there but it can't be depended upon; | |
78 | * otherwise, we wouldn't be resetting. Just give it enough | |
79 | * time for most drives to spin up. | |
80 | */ | |
81 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
82 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
83 | |
84 | ATA_EH_UA_TRIES = 5, | |
31daabda TH |
85 | }; |
86 | ||
87 | /* The following table determines how we sequence resets. Each entry | |
88 | * represents timeout for that try. The first try can be soft or | |
89 | * hardreset. All others are hardreset if available. In most cases | |
90 | * the first reset w/ 10sec timeout should succeed. Following entries | |
91 | * are mostly for error handling, hotplug and retarded devices. | |
92 | */ | |
93 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
94 | 10000, /* most drives spin up by 10sec */ |
95 | 10000, /* > 99% working drives spin up before 20sec */ | |
96 | 35000, /* give > 30 secs of idleness for retarded devices */ | |
97 | 5000, /* and sweet one last chance */ | |
d8af0eb6 | 98 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
99 | }; |
100 | ||
87fbc5a0 TH |
101 | static const unsigned long ata_eh_identify_timeouts[] = { |
102 | 5000, /* covers > 99% of successes and not too boring on failures */ | |
103 | 10000, /* combined time till here is enough even for media access */ | |
104 | 30000, /* for true idiots */ | |
105 | ULONG_MAX, | |
106 | }; | |
107 | ||
108 | static const unsigned long ata_eh_other_timeouts[] = { | |
109 | 5000, /* same rationale as identify timeout */ | |
110 | 10000, /* ditto */ | |
111 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
112 | ULONG_MAX, | |
113 | }; | |
114 | ||
115 | struct ata_eh_cmd_timeout_ent { | |
116 | const u8 *commands; | |
117 | const unsigned long *timeouts; | |
118 | }; | |
119 | ||
120 | /* The following table determines timeouts to use for EH internal | |
121 | * commands. Each table entry is a command class and matches the | |
122 | * commands the entry applies to and the timeout table to use. | |
123 | * | |
124 | * On the retry after a command timed out, the next timeout value from | |
125 | * the table is used. If the table doesn't contain further entries, | |
126 | * the last value is used. | |
127 | * | |
128 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
129 | * command class, so if SET_FEATURES times out on the first try, the | |
130 | * next try will use the second timeout value only for that class. | |
131 | */ | |
132 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
133 | static const struct ata_eh_cmd_timeout_ent | |
134 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
135 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
136 | .timeouts = ata_eh_identify_timeouts, }, | |
137 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), | |
138 | .timeouts = ata_eh_other_timeouts, }, | |
139 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
140 | .timeouts = ata_eh_other_timeouts, }, | |
141 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
142 | .timeouts = ata_eh_other_timeouts, }, | |
143 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
144 | .timeouts = ata_eh_other_timeouts, }, | |
145 | }; | |
146 | #undef CMDS | |
147 | ||
ad9e2762 | 148 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 149 | #ifdef CONFIG_PM |
500530f6 TH |
150 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
151 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
152 | #else /* CONFIG_PM */ |
153 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
154 | { } | |
155 | ||
156 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
157 | { } | |
6ffa01d8 | 158 | #endif /* CONFIG_PM */ |
ad9e2762 | 159 | |
b64bbc39 TH |
160 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
161 | va_list args) | |
162 | { | |
163 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
164 | ATA_EH_DESC_LEN - ehi->desc_len, | |
165 | fmt, args); | |
166 | } | |
167 | ||
168 | /** | |
169 | * __ata_ehi_push_desc - push error description without adding separator | |
170 | * @ehi: target EHI | |
171 | * @fmt: printf format string | |
172 | * | |
173 | * Format string according to @fmt and append it to @ehi->desc. | |
174 | * | |
175 | * LOCKING: | |
176 | * spin_lock_irqsave(host lock) | |
177 | */ | |
178 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
179 | { | |
180 | va_list args; | |
181 | ||
182 | va_start(args, fmt); | |
183 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
184 | va_end(args); | |
185 | } | |
186 | ||
187 | /** | |
188 | * ata_ehi_push_desc - push error description with separator | |
189 | * @ehi: target EHI | |
190 | * @fmt: printf format string | |
191 | * | |
192 | * Format string according to @fmt and append it to @ehi->desc. | |
193 | * If @ehi->desc is not empty, ", " is added in-between. | |
194 | * | |
195 | * LOCKING: | |
196 | * spin_lock_irqsave(host lock) | |
197 | */ | |
198 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
199 | { | |
200 | va_list args; | |
201 | ||
202 | if (ehi->desc_len) | |
203 | __ata_ehi_push_desc(ehi, ", "); | |
204 | ||
205 | va_start(args, fmt); | |
206 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
207 | va_end(args); | |
208 | } | |
209 | ||
210 | /** | |
211 | * ata_ehi_clear_desc - clean error description | |
212 | * @ehi: target EHI | |
213 | * | |
214 | * Clear @ehi->desc. | |
215 | * | |
216 | * LOCKING: | |
217 | * spin_lock_irqsave(host lock) | |
218 | */ | |
219 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
220 | { | |
221 | ehi->desc[0] = '\0'; | |
222 | ehi->desc_len = 0; | |
223 | } | |
224 | ||
cbcdd875 TH |
225 | /** |
226 | * ata_port_desc - append port description | |
227 | * @ap: target ATA port | |
228 | * @fmt: printf format string | |
229 | * | |
230 | * Format string according to @fmt and append it to port | |
231 | * description. If port description is not empty, " " is added | |
232 | * in-between. This function is to be used while initializing | |
233 | * ata_host. The description is printed on host registration. | |
234 | * | |
235 | * LOCKING: | |
236 | * None. | |
237 | */ | |
238 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
239 | { | |
240 | va_list args; | |
241 | ||
242 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
243 | ||
244 | if (ap->link.eh_info.desc_len) | |
245 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
246 | ||
247 | va_start(args, fmt); | |
248 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
249 | va_end(args); | |
250 | } | |
251 | ||
252 | #ifdef CONFIG_PCI | |
253 | ||
254 | /** | |
255 | * ata_port_pbar_desc - append PCI BAR description | |
256 | * @ap: target ATA port | |
257 | * @bar: target PCI BAR | |
258 | * @offset: offset into PCI BAR | |
259 | * @name: name of the area | |
260 | * | |
261 | * If @offset is negative, this function formats a string which | |
262 | * contains the name, address, size and type of the BAR and | |
263 | * appends it to the port description. If @offset is zero or | |
264 | * positive, only name and offsetted address is appended. | |
265 | * | |
266 | * LOCKING: | |
267 | * None. | |
268 | */ | |
269 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
270 | const char *name) | |
271 | { | |
272 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
273 | char *type = ""; | |
274 | unsigned long long start, len; | |
275 | ||
276 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
277 | type = "m"; | |
278 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
279 | type = "i"; | |
280 | ||
281 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
282 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
283 | ||
284 | if (offset < 0) | |
285 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
286 | else | |
e6a73ab1 AM |
287 | ata_port_desc(ap, "%s 0x%llx", name, |
288 | start + (unsigned long long)offset); | |
cbcdd875 TH |
289 | } |
290 | ||
291 | #endif /* CONFIG_PCI */ | |
292 | ||
87fbc5a0 TH |
293 | static int ata_lookup_timeout_table(u8 cmd) |
294 | { | |
295 | int i; | |
296 | ||
297 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
298 | const u8 *cur; | |
299 | ||
300 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
301 | if (*cur == cmd) | |
302 | return i; | |
303 | } | |
304 | ||
305 | return -1; | |
306 | } | |
307 | ||
308 | /** | |
309 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
310 | * @dev: target device | |
311 | * @cmd: internal command to be issued | |
312 | * | |
313 | * Determine timeout for internal command @cmd for @dev. | |
314 | * | |
315 | * LOCKING: | |
316 | * EH context. | |
317 | * | |
318 | * RETURNS: | |
319 | * Determined timeout. | |
320 | */ | |
321 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) | |
322 | { | |
323 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
324 | int ent = ata_lookup_timeout_table(cmd); | |
325 | int idx; | |
326 | ||
327 | if (ent < 0) | |
328 | return ATA_EH_CMD_DFL_TIMEOUT; | |
329 | ||
330 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
331 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
332 | } | |
333 | ||
334 | /** | |
335 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
336 | * @dev: target device | |
337 | * @cmd: internal command which timed out | |
338 | * | |
339 | * Notify EH that internal command @cmd for @dev timed out. This | |
340 | * function should be called only for commands whose timeouts are | |
341 | * determined using ata_internal_cmd_timeout(). | |
342 | * | |
343 | * LOCKING: | |
344 | * EH context. | |
345 | */ | |
346 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
347 | { | |
348 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
349 | int ent = ata_lookup_timeout_table(cmd); | |
350 | int idx; | |
351 | ||
352 | if (ent < 0) | |
353 | return; | |
354 | ||
355 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
356 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) | |
357 | ehc->cmd_timeout_idx[dev->devno][ent]++; | |
358 | } | |
359 | ||
3884f7b0 | 360 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
361 | unsigned int err_mask) |
362 | { | |
363 | struct ata_ering_entry *ent; | |
364 | ||
365 | WARN_ON(!err_mask); | |
366 | ||
367 | ering->cursor++; | |
368 | ering->cursor %= ATA_ERING_SIZE; | |
369 | ||
370 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 371 | ent->eflags = eflags; |
0c247c55 TH |
372 | ent->err_mask = err_mask; |
373 | ent->timestamp = get_jiffies_64(); | |
374 | } | |
375 | ||
76326ac1 TH |
376 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
377 | { | |
378 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
379 | ||
380 | if (ent->err_mask) | |
381 | return ent; | |
382 | return NULL; | |
383 | } | |
384 | ||
7d47e8d4 | 385 | static void ata_ering_clear(struct ata_ering *ering) |
0c247c55 | 386 | { |
7d47e8d4 | 387 | memset(ering, 0, sizeof(*ering)); |
0c247c55 TH |
388 | } |
389 | ||
390 | static int ata_ering_map(struct ata_ering *ering, | |
391 | int (*map_fn)(struct ata_ering_entry *, void *), | |
392 | void *arg) | |
393 | { | |
394 | int idx, rc = 0; | |
395 | struct ata_ering_entry *ent; | |
396 | ||
397 | idx = ering->cursor; | |
398 | do { | |
399 | ent = &ering->ring[idx]; | |
400 | if (!ent->err_mask) | |
401 | break; | |
402 | rc = map_fn(ent, arg); | |
403 | if (rc) | |
404 | break; | |
405 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
406 | } while (idx != ering->cursor); | |
407 | ||
408 | return rc; | |
409 | } | |
410 | ||
64f65ca6 TH |
411 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
412 | { | |
9af5c9c9 | 413 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
414 | |
415 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
416 | } | |
417 | ||
f58229f8 | 418 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
419 | struct ata_eh_info *ehi, unsigned int action) |
420 | { | |
f58229f8 | 421 | struct ata_device *tdev; |
af181c2d TH |
422 | |
423 | if (!dev) { | |
424 | ehi->action &= ~action; | |
f58229f8 TH |
425 | ata_link_for_each_dev(tdev, link) |
426 | ehi->dev_action[tdev->devno] &= ~action; | |
af181c2d TH |
427 | } else { |
428 | /* doesn't make sense for port-wide EH actions */ | |
429 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
430 | ||
431 | /* break ehi->action into ehi->dev_action */ | |
432 | if (ehi->action & action) { | |
f58229f8 TH |
433 | ata_link_for_each_dev(tdev, link) |
434 | ehi->dev_action[tdev->devno] |= | |
435 | ehi->action & action; | |
af181c2d TH |
436 | ehi->action &= ~action; |
437 | } | |
438 | ||
439 | /* turn off the specified per-dev action */ | |
440 | ehi->dev_action[dev->devno] &= ~action; | |
441 | } | |
442 | } | |
443 | ||
ece1d636 TH |
444 | /** |
445 | * ata_scsi_timed_out - SCSI layer time out callback | |
446 | * @cmd: timed out SCSI command | |
447 | * | |
448 | * Handles SCSI layer timeout. We race with normal completion of | |
449 | * the qc for @cmd. If the qc is already gone, we lose and let | |
450 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has | |
451 | * timed out and EH should be invoked. Prevent ata_qc_complete() | |
452 | * from finishing it by setting EH_SCHEDULED and return | |
453 | * EH_NOT_HANDLED. | |
454 | * | |
ad9e2762 TH |
455 | * TODO: kill this function once old EH is gone. |
456 | * | |
ece1d636 TH |
457 | * LOCKING: |
458 | * Called from timer context | |
459 | * | |
460 | * RETURNS: | |
461 | * EH_HANDLED or EH_NOT_HANDLED | |
462 | */ | |
242f9dcb | 463 | enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) |
ece1d636 TH |
464 | { |
465 | struct Scsi_Host *host = cmd->device->host; | |
35bb94b1 | 466 | struct ata_port *ap = ata_shost_to_port(host); |
ece1d636 TH |
467 | unsigned long flags; |
468 | struct ata_queued_cmd *qc; | |
242f9dcb | 469 | enum blk_eh_timer_return ret; |
ece1d636 TH |
470 | |
471 | DPRINTK("ENTER\n"); | |
472 | ||
ad9e2762 | 473 | if (ap->ops->error_handler) { |
242f9dcb | 474 | ret = BLK_EH_NOT_HANDLED; |
ad9e2762 TH |
475 | goto out; |
476 | } | |
477 | ||
242f9dcb | 478 | ret = BLK_EH_HANDLED; |
ba6a1308 | 479 | spin_lock_irqsave(ap->lock, flags); |
9af5c9c9 | 480 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
ece1d636 TH |
481 | if (qc) { |
482 | WARN_ON(qc->scsicmd != cmd); | |
483 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; | |
484 | qc->err_mask |= AC_ERR_TIMEOUT; | |
242f9dcb | 485 | ret = BLK_EH_NOT_HANDLED; |
ece1d636 | 486 | } |
ba6a1308 | 487 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 488 | |
ad9e2762 | 489 | out: |
ece1d636 TH |
490 | DPRINTK("EXIT, ret=%d\n", ret); |
491 | return ret; | |
492 | } | |
493 | ||
494 | /** | |
495 | * ata_scsi_error - SCSI layer error handler callback | |
496 | * @host: SCSI host on which error occurred | |
497 | * | |
498 | * Handles SCSI-layer-thrown error events. | |
499 | * | |
500 | * LOCKING: | |
501 | * Inherited from SCSI layer (none, can sleep) | |
502 | * | |
503 | * RETURNS: | |
504 | * Zero. | |
505 | */ | |
381544bb | 506 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 507 | { |
35bb94b1 | 508 | struct ata_port *ap = ata_shost_to_port(host); |
a1e10f7e | 509 | int i; |
ad9e2762 | 510 | unsigned long flags; |
ece1d636 TH |
511 | |
512 | DPRINTK("ENTER\n"); | |
513 | ||
ad9e2762 | 514 | /* synchronize with port task */ |
ece1d636 TH |
515 | ata_port_flush_task(ap); |
516 | ||
cca3974e | 517 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
518 | |
519 | /* For new EH, all qcs are finished in one of three ways - | |
520 | * normal completion, error completion, and SCSI timeout. | |
521 | * Both cmpletions can race against SCSI timeout. When normal | |
522 | * completion wins, the qc never reaches EH. When error | |
523 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
524 | * | |
525 | * When SCSI timeout wins, things are a bit more complex. | |
526 | * Normal or error completion can occur after the timeout but | |
527 | * before this point. In such cases, both types of | |
528 | * completions are honored. A scmd is determined to have | |
529 | * timed out iff its associated qc is active and not failed. | |
530 | */ | |
531 | if (ap->ops->error_handler) { | |
532 | struct scsi_cmnd *scmd, *tmp; | |
533 | int nr_timedout = 0; | |
534 | ||
e30349d2 | 535 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 TH |
536 | |
537 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { | |
538 | struct ata_queued_cmd *qc; | |
539 | ||
540 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
541 | qc = __ata_qc_from_tag(ap, i); | |
542 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
543 | qc->scsicmd == scmd) | |
544 | break; | |
545 | } | |
546 | ||
547 | if (i < ATA_MAX_QUEUE) { | |
548 | /* the scmd has an associated qc */ | |
549 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
550 | /* which hasn't failed yet, timeout */ | |
551 | qc->err_mask |= AC_ERR_TIMEOUT; | |
552 | qc->flags |= ATA_QCFLAG_FAILED; | |
553 | nr_timedout++; | |
554 | } | |
555 | } else { | |
556 | /* Normal completion occurred after | |
557 | * SCSI timeout but before this point. | |
558 | * Successfully complete it. | |
559 | */ | |
560 | scmd->retries = scmd->allowed; | |
561 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
562 | } | |
563 | } | |
564 | ||
565 | /* If we have timed out qcs. They belong to EH from | |
566 | * this point but the state of the controller is | |
567 | * unknown. Freeze the port to make sure the IRQ | |
568 | * handler doesn't diddle with those qcs. This must | |
569 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
570 | */ | |
571 | if (nr_timedout) | |
572 | __ata_port_freeze(ap); | |
573 | ||
e30349d2 | 574 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
575 | |
576 | /* initialize eh_tries */ | |
577 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 578 | } else |
e30349d2 | 579 | spin_unlock_wait(ap->lock); |
ad9e2762 TH |
580 | |
581 | repeat: | |
582 | /* invoke error handler */ | |
583 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
584 | struct ata_link *link; |
585 | ||
5ddf24c5 TH |
586 | /* kill fast drain timer */ |
587 | del_timer_sync(&ap->fastdrain_timer); | |
588 | ||
500530f6 TH |
589 | /* process port resume request */ |
590 | ata_eh_handle_port_resume(ap); | |
591 | ||
f3e81b19 | 592 | /* fetch & clear EH info */ |
e30349d2 | 593 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 594 | |
cf1b86c8 | 595 | __ata_port_for_each_link(link, ap) { |
00115e0f TH |
596 | struct ata_eh_context *ehc = &link->eh_context; |
597 | struct ata_device *dev; | |
598 | ||
cf1b86c8 TH |
599 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
600 | link->eh_context.i = link->eh_info; | |
601 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f TH |
602 | |
603 | ata_link_for_each_dev(dev, link) { | |
604 | int devno = dev->devno; | |
605 | ||
4a9c7b33 TH |
606 | if (!ata_dev_enabled(dev)) |
607 | continue; | |
608 | ||
00115e0f TH |
609 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; |
610 | if (ata_ncq_enabled(dev)) | |
611 | ehc->saved_ncq_enabled |= 1 << devno; | |
612 | } | |
0a2c0f56 TH |
613 | |
614 | /* set last reset timestamp to some time in the past */ | |
615 | ehc->last_reset = jiffies - 60 * HZ; | |
cf1b86c8 | 616 | } |
f3e81b19 | 617 | |
b51e9e5d TH |
618 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
619 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 620 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 621 | |
e30349d2 | 622 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 623 | |
500530f6 TH |
624 | /* invoke EH, skip if unloading or suspended */ |
625 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 TH |
626 | ap->ops->error_handler(ap); |
627 | else | |
628 | ata_eh_finish(ap); | |
ad9e2762 | 629 | |
500530f6 TH |
630 | /* process port suspend request */ |
631 | ata_eh_handle_port_suspend(ap); | |
632 | ||
ad9e2762 TH |
633 | /* Exception might have happend after ->error_handler |
634 | * recovered the port but before this point. Repeat | |
635 | * EH in such case. | |
636 | */ | |
e30349d2 | 637 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 638 | |
b51e9e5d | 639 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 640 | if (--ap->eh_tries) { |
e30349d2 | 641 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
642 | goto repeat; |
643 | } | |
644 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " | |
a1e10f7e | 645 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
914616a3 | 646 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
647 | } |
648 | ||
f3e81b19 | 649 | /* this run is complete, make sure EH info is clear */ |
cf1b86c8 TH |
650 | __ata_port_for_each_link(link, ap) |
651 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
f3e81b19 | 652 | |
e30349d2 | 653 | /* Clear host_eh_scheduled while holding ap->lock such |
ad9e2762 TH |
654 | * that if exception occurs after this point but |
655 | * before EH completion, SCSI midlayer will | |
656 | * re-initiate EH. | |
657 | */ | |
658 | host->host_eh_scheduled = 0; | |
659 | ||
e30349d2 | 660 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 661 | } else { |
9af5c9c9 | 662 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
663 | ap->ops->eng_timeout(ap); |
664 | } | |
ece1d636 | 665 | |
ad9e2762 | 666 | /* finish or retry handled scmd's and clean up */ |
ece1d636 TH |
667 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
668 | ||
669 | scsi_eh_flush_done_q(&ap->eh_done_q); | |
670 | ||
ad9e2762 | 671 | /* clean up */ |
e30349d2 | 672 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 673 | |
1cdaf534 | 674 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 675 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 676 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
52bad64d | 677 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, 0); |
1cdaf534 TH |
678 | |
679 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
680 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); | |
580b2102 | 681 | |
b51e9e5d | 682 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 683 | |
c6cf9e99 | 684 | /* tell wait_eh that we're done */ |
b51e9e5d | 685 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
686 | wake_up_all(&ap->eh_wait_q); |
687 | ||
e30349d2 | 688 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 689 | |
ece1d636 | 690 | DPRINTK("EXIT\n"); |
ece1d636 TH |
691 | } |
692 | ||
c6cf9e99 TH |
693 | /** |
694 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
695 | * @ap: Port to wait EH for | |
696 | * | |
697 | * Wait until the currently pending EH is complete. | |
698 | * | |
699 | * LOCKING: | |
700 | * Kernel thread context (may sleep). | |
701 | */ | |
702 | void ata_port_wait_eh(struct ata_port *ap) | |
703 | { | |
704 | unsigned long flags; | |
705 | DEFINE_WAIT(wait); | |
706 | ||
707 | retry: | |
ba6a1308 | 708 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 709 | |
b51e9e5d | 710 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 711 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 712 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 713 | schedule(); |
ba6a1308 | 714 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 715 | } |
0a1b622e | 716 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 717 | |
ba6a1308 | 718 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
719 | |
720 | /* make sure SCSI EH is complete */ | |
cca3974e | 721 | if (scsi_host_in_recovery(ap->scsi_host)) { |
c6cf9e99 TH |
722 | msleep(10); |
723 | goto retry; | |
724 | } | |
725 | } | |
726 | ||
5ddf24c5 TH |
727 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
728 | { | |
729 | unsigned int tag; | |
730 | int nr = 0; | |
731 | ||
732 | /* count only non-internal commands */ | |
733 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
734 | if (ata_qc_from_tag(ap, tag)) | |
735 | nr++; | |
736 | ||
737 | return nr; | |
738 | } | |
739 | ||
740 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
741 | { | |
742 | struct ata_port *ap = (void *)arg; | |
743 | unsigned long flags; | |
744 | int cnt; | |
745 | ||
746 | spin_lock_irqsave(ap->lock, flags); | |
747 | ||
748 | cnt = ata_eh_nr_in_flight(ap); | |
749 | ||
750 | /* are we done? */ | |
751 | if (!cnt) | |
752 | goto out_unlock; | |
753 | ||
754 | if (cnt == ap->fastdrain_cnt) { | |
755 | unsigned int tag; | |
756 | ||
757 | /* No progress during the last interval, tag all | |
758 | * in-flight qcs as timed out and freeze the port. | |
759 | */ | |
760 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
761 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
762 | if (qc) | |
763 | qc->err_mask |= AC_ERR_TIMEOUT; | |
764 | } | |
765 | ||
766 | ata_port_freeze(ap); | |
767 | } else { | |
768 | /* some qcs have finished, give it another chance */ | |
769 | ap->fastdrain_cnt = cnt; | |
770 | ap->fastdrain_timer.expires = | |
341c2c95 | 771 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
772 | add_timer(&ap->fastdrain_timer); |
773 | } | |
774 | ||
775 | out_unlock: | |
776 | spin_unlock_irqrestore(ap->lock, flags); | |
777 | } | |
778 | ||
779 | /** | |
780 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
781 | * @ap: target ATA port | |
782 | * @fastdrain: activate fast drain | |
783 | * | |
784 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
785 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
786 | * that EH kicks in in timely manner. | |
787 | * | |
788 | * LOCKING: | |
789 | * spin_lock_irqsave(host lock) | |
790 | */ | |
791 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
792 | { | |
793 | int cnt; | |
794 | ||
795 | /* already scheduled? */ | |
796 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
797 | return; | |
798 | ||
799 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
800 | ||
801 | if (!fastdrain) | |
802 | return; | |
803 | ||
804 | /* do we have in-flight qcs? */ | |
805 | cnt = ata_eh_nr_in_flight(ap); | |
806 | if (!cnt) | |
807 | return; | |
808 | ||
809 | /* activate fast drain */ | |
810 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
811 | ap->fastdrain_timer.expires = |
812 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
813 | add_timer(&ap->fastdrain_timer); |
814 | } | |
815 | ||
f686bcb8 TH |
816 | /** |
817 | * ata_qc_schedule_eh - schedule qc for error handling | |
818 | * @qc: command to schedule error handling for | |
819 | * | |
820 | * Schedule error handling for @qc. EH will kick in as soon as | |
821 | * other commands are drained. | |
822 | * | |
823 | * LOCKING: | |
cca3974e | 824 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
825 | */ |
826 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
827 | { | |
828 | struct ata_port *ap = qc->ap; | |
829 | ||
830 | WARN_ON(!ap->ops->error_handler); | |
831 | ||
832 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 833 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
834 | |
835 | /* The following will fail if timeout has already expired. | |
836 | * ata_scsi_error() takes care of such scmds on EH entry. | |
837 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
838 | * this function completes. | |
839 | */ | |
242f9dcb | 840 | blk_abort_request(qc->scsicmd->request); |
f686bcb8 TH |
841 | } |
842 | ||
7b70fc03 TH |
843 | /** |
844 | * ata_port_schedule_eh - schedule error handling without a qc | |
845 | * @ap: ATA port to schedule EH for | |
846 | * | |
847 | * Schedule error handling for @ap. EH will kick in as soon as | |
848 | * all commands are drained. | |
849 | * | |
850 | * LOCKING: | |
cca3974e | 851 | * spin_lock_irqsave(host lock) |
7b70fc03 TH |
852 | */ |
853 | void ata_port_schedule_eh(struct ata_port *ap) | |
854 | { | |
855 | WARN_ON(!ap->ops->error_handler); | |
856 | ||
f4d6d004 TH |
857 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
858 | return; | |
859 | ||
5ddf24c5 | 860 | ata_eh_set_pending(ap, 1); |
cca3974e | 861 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
862 | |
863 | DPRINTK("port EH scheduled\n"); | |
864 | } | |
865 | ||
dbd82616 | 866 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
867 | { |
868 | int tag, nr_aborted = 0; | |
869 | ||
870 | WARN_ON(!ap->ops->error_handler); | |
871 | ||
5ddf24c5 TH |
872 | /* we're gonna abort all commands, no need for fast drain */ |
873 | ata_eh_set_pending(ap, 0); | |
874 | ||
7b70fc03 TH |
875 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
876 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
877 | ||
dbd82616 | 878 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
879 | qc->flags |= ATA_QCFLAG_FAILED; |
880 | ata_qc_complete(qc); | |
881 | nr_aborted++; | |
882 | } | |
883 | } | |
884 | ||
885 | if (!nr_aborted) | |
886 | ata_port_schedule_eh(ap); | |
887 | ||
888 | return nr_aborted; | |
889 | } | |
890 | ||
dbd82616 TH |
891 | /** |
892 | * ata_link_abort - abort all qc's on the link | |
893 | * @link: ATA link to abort qc's for | |
894 | * | |
895 | * Abort all active qc's active on @link and schedule EH. | |
896 | * | |
897 | * LOCKING: | |
898 | * spin_lock_irqsave(host lock) | |
899 | * | |
900 | * RETURNS: | |
901 | * Number of aborted qc's. | |
902 | */ | |
903 | int ata_link_abort(struct ata_link *link) | |
904 | { | |
905 | return ata_do_link_abort(link->ap, link); | |
906 | } | |
907 | ||
908 | /** | |
909 | * ata_port_abort - abort all qc's on the port | |
910 | * @ap: ATA port to abort qc's for | |
911 | * | |
912 | * Abort all active qc's of @ap and schedule EH. | |
913 | * | |
914 | * LOCKING: | |
915 | * spin_lock_irqsave(host_set lock) | |
916 | * | |
917 | * RETURNS: | |
918 | * Number of aborted qc's. | |
919 | */ | |
920 | int ata_port_abort(struct ata_port *ap) | |
921 | { | |
922 | return ata_do_link_abort(ap, NULL); | |
923 | } | |
924 | ||
e3180499 TH |
925 | /** |
926 | * __ata_port_freeze - freeze port | |
927 | * @ap: ATA port to freeze | |
928 | * | |
929 | * This function is called when HSM violation or some other | |
930 | * condition disrupts normal operation of the port. Frozen port | |
931 | * is not allowed to perform any operation until the port is | |
932 | * thawed, which usually follows a successful reset. | |
933 | * | |
934 | * ap->ops->freeze() callback can be used for freezing the port | |
935 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
936 | * port cannot be frozen hardware-wise, the interrupt handler | |
937 | * must ack and clear interrupts unconditionally while the port | |
938 | * is frozen. | |
939 | * | |
940 | * LOCKING: | |
cca3974e | 941 | * spin_lock_irqsave(host lock) |
e3180499 TH |
942 | */ |
943 | static void __ata_port_freeze(struct ata_port *ap) | |
944 | { | |
945 | WARN_ON(!ap->ops->error_handler); | |
946 | ||
947 | if (ap->ops->freeze) | |
948 | ap->ops->freeze(ap); | |
949 | ||
b51e9e5d | 950 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 951 | |
44877b4e | 952 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
953 | } |
954 | ||
955 | /** | |
956 | * ata_port_freeze - abort & freeze port | |
957 | * @ap: ATA port to freeze | |
958 | * | |
959 | * Abort and freeze @ap. | |
960 | * | |
961 | * LOCKING: | |
cca3974e | 962 | * spin_lock_irqsave(host lock) |
e3180499 TH |
963 | * |
964 | * RETURNS: | |
965 | * Number of aborted commands. | |
966 | */ | |
967 | int ata_port_freeze(struct ata_port *ap) | |
968 | { | |
969 | int nr_aborted; | |
970 | ||
971 | WARN_ON(!ap->ops->error_handler); | |
972 | ||
973 | nr_aborted = ata_port_abort(ap); | |
974 | __ata_port_freeze(ap); | |
975 | ||
976 | return nr_aborted; | |
977 | } | |
978 | ||
7d77b247 TH |
979 | /** |
980 | * sata_async_notification - SATA async notification handler | |
981 | * @ap: ATA port where async notification is received | |
982 | * | |
983 | * Handler to be called when async notification via SDB FIS is | |
984 | * received. This function schedules EH if necessary. | |
985 | * | |
986 | * LOCKING: | |
987 | * spin_lock_irqsave(host lock) | |
988 | * | |
989 | * RETURNS: | |
990 | * 1 if EH is scheduled, 0 otherwise. | |
991 | */ | |
992 | int sata_async_notification(struct ata_port *ap) | |
993 | { | |
994 | u32 sntf; | |
995 | int rc; | |
996 | ||
997 | if (!(ap->flags & ATA_FLAG_AN)) | |
998 | return 0; | |
999 | ||
1000 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
1001 | if (rc == 0) | |
1002 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1003 | ||
071f44b1 | 1004 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1005 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1006 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1007 | /* PMP is not attached. Check whether ATAPI |
1008 | * AN is configured. If so, notify media | |
1009 | * change. | |
1010 | */ | |
1011 | struct ata_device *dev = ap->link.device; | |
1012 | ||
1013 | if ((dev->class == ATA_DEV_ATAPI) && | |
1014 | (dev->flags & ATA_DFLAG_AN)) | |
1015 | ata_scsi_media_change_notify(dev); | |
1016 | return 0; | |
1017 | } else { | |
1018 | /* PMP is attached but SNTF is not available. | |
1019 | * ATAPI async media change notification is | |
1020 | * not used. The PMP must be reporting PHY | |
1021 | * status change, schedule EH. | |
1022 | */ | |
1023 | ata_port_schedule_eh(ap); | |
1024 | return 1; | |
1025 | } | |
1026 | } else { | |
1027 | /* PMP is attached and SNTF is available */ | |
1028 | struct ata_link *link; | |
1029 | ||
1030 | /* check and notify ATAPI AN */ | |
1031 | ata_port_for_each_link(link, ap) { | |
1032 | if (!(sntf & (1 << link->pmp))) | |
1033 | continue; | |
1034 | ||
1035 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1036 | (link->device->flags & ATA_DFLAG_AN)) | |
1037 | ata_scsi_media_change_notify(link->device); | |
1038 | } | |
1039 | ||
1040 | /* If PMP is reporting that PHY status of some | |
1041 | * downstream ports has changed, schedule EH. | |
1042 | */ | |
1043 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1044 | ata_port_schedule_eh(ap); | |
1045 | return 1; | |
1046 | } | |
1047 | ||
1048 | return 0; | |
1049 | } | |
1050 | } | |
1051 | ||
e3180499 TH |
1052 | /** |
1053 | * ata_eh_freeze_port - EH helper to freeze port | |
1054 | * @ap: ATA port to freeze | |
1055 | * | |
1056 | * Freeze @ap. | |
1057 | * | |
1058 | * LOCKING: | |
1059 | * None. | |
1060 | */ | |
1061 | void ata_eh_freeze_port(struct ata_port *ap) | |
1062 | { | |
1063 | unsigned long flags; | |
1064 | ||
1065 | if (!ap->ops->error_handler) | |
1066 | return; | |
1067 | ||
ba6a1308 | 1068 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1069 | __ata_port_freeze(ap); |
ba6a1308 | 1070 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1071 | } |
1072 | ||
1073 | /** | |
1074 | * ata_port_thaw_port - EH helper to thaw port | |
1075 | * @ap: ATA port to thaw | |
1076 | * | |
1077 | * Thaw frozen port @ap. | |
1078 | * | |
1079 | * LOCKING: | |
1080 | * None. | |
1081 | */ | |
1082 | void ata_eh_thaw_port(struct ata_port *ap) | |
1083 | { | |
1084 | unsigned long flags; | |
1085 | ||
1086 | if (!ap->ops->error_handler) | |
1087 | return; | |
1088 | ||
ba6a1308 | 1089 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1090 | |
b51e9e5d | 1091 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1092 | |
1093 | if (ap->ops->thaw) | |
1094 | ap->ops->thaw(ap); | |
1095 | ||
ba6a1308 | 1096 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1097 | |
44877b4e | 1098 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1099 | } |
1100 | ||
ece1d636 TH |
1101 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1102 | { | |
1103 | /* nada */ | |
1104 | } | |
1105 | ||
1106 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1107 | { | |
1108 | struct ata_port *ap = qc->ap; | |
1109 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1110 | unsigned long flags; | |
1111 | ||
ba6a1308 | 1112 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1113 | qc->scsidone = ata_eh_scsidone; |
1114 | __ata_qc_complete(qc); | |
1115 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1116 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1117 | |
1118 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1119 | } | |
1120 | ||
1121 | /** | |
1122 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1123 | * @qc: Command to complete | |
1124 | * | |
1125 | * Indicate to the mid and upper layers that an ATA command has | |
1126 | * completed. To be used from EH. | |
1127 | */ | |
1128 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1129 | { | |
1130 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1131 | scmd->retries = scmd->allowed; | |
1132 | __ata_eh_qc_complete(qc); | |
1133 | } | |
1134 | ||
1135 | /** | |
1136 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1137 | * @qc: Command to retry | |
1138 | * | |
1139 | * Indicate to the mid and upper layers that an ATA command | |
1140 | * should be retried. To be used from EH. | |
1141 | * | |
1142 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
1143 | * scmd->retries is decremented for commands which get retried | |
1144 | * due to unrelated failures (qc->err_mask is zero). | |
1145 | */ | |
1146 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1147 | { | |
1148 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1149 | if (!qc->err_mask && scmd->retries) | |
1150 | scmd->retries--; | |
1151 | __ata_eh_qc_complete(qc); | |
1152 | } | |
022bdb07 | 1153 | |
0ea035a3 TH |
1154 | /** |
1155 | * ata_eh_detach_dev - detach ATA device | |
1156 | * @dev: ATA device to detach | |
1157 | * | |
1158 | * Detach @dev. | |
1159 | * | |
1160 | * LOCKING: | |
1161 | * None. | |
1162 | */ | |
fb7fd614 | 1163 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1164 | { |
f58229f8 TH |
1165 | struct ata_link *link = dev->link; |
1166 | struct ata_port *ap = link->ap; | |
0ea035a3 TH |
1167 | unsigned long flags; |
1168 | ||
1169 | ata_dev_disable(dev); | |
1170 | ||
ba6a1308 | 1171 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1172 | |
1173 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1174 | ||
1175 | if (ata_scsi_offline_dev(dev)) { | |
1176 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1177 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1178 | } |
1179 | ||
beb07c1a | 1180 | /* clear per-dev EH actions */ |
f58229f8 TH |
1181 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1182 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
beb07c1a | 1183 | |
ba6a1308 | 1184 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1185 | } |
1186 | ||
022bdb07 TH |
1187 | /** |
1188 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1189 | * @link: target ATA link |
47005f25 | 1190 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1191 | * @action: action about to be performed |
1192 | * | |
1193 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1194 | * in @link->eh_info such that eh actions are not unnecessarily |
1195 | * repeated. | |
022bdb07 TH |
1196 | * |
1197 | * LOCKING: | |
1198 | * None. | |
1199 | */ | |
fb7fd614 TH |
1200 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1201 | unsigned int action) | |
022bdb07 | 1202 | { |
955e57df TH |
1203 | struct ata_port *ap = link->ap; |
1204 | struct ata_eh_info *ehi = &link->eh_info; | |
1205 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1206 | unsigned long flags; |
1207 | ||
ba6a1308 | 1208 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1209 | |
955e57df | 1210 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1211 | |
a568d1d2 TH |
1212 | /* About to take EH action, set RECOVERED. Ignore actions on |
1213 | * slave links as master will do them again. | |
1214 | */ | |
1215 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1216 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1217 | ||
ba6a1308 | 1218 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1219 | } |
1220 | ||
47005f25 TH |
1221 | /** |
1222 | * ata_eh_done - EH action complete | |
955e57df | 1223 | * @ap: target ATA port |
47005f25 TH |
1224 | * @dev: target ATA dev for per-dev action (can be NULL) |
1225 | * @action: action just completed | |
1226 | * | |
1227 | * Called right after performing EH actions to clear related bits | |
955e57df | 1228 | * in @link->eh_context. |
47005f25 TH |
1229 | * |
1230 | * LOCKING: | |
1231 | * None. | |
1232 | */ | |
fb7fd614 TH |
1233 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1234 | unsigned int action) | |
47005f25 | 1235 | { |
955e57df | 1236 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1237 | |
955e57df | 1238 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1239 | } |
1240 | ||
022bdb07 TH |
1241 | /** |
1242 | * ata_err_string - convert err_mask to descriptive string | |
1243 | * @err_mask: error mask to convert to string | |
1244 | * | |
1245 | * Convert @err_mask to descriptive string. Errors are | |
1246 | * prioritized according to severity and only the most severe | |
1247 | * error is reported. | |
1248 | * | |
1249 | * LOCKING: | |
1250 | * None. | |
1251 | * | |
1252 | * RETURNS: | |
1253 | * Descriptive string for @err_mask | |
1254 | */ | |
2dcb407e | 1255 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1256 | { |
1257 | if (err_mask & AC_ERR_HOST_BUS) | |
1258 | return "host bus error"; | |
1259 | if (err_mask & AC_ERR_ATA_BUS) | |
1260 | return "ATA bus error"; | |
1261 | if (err_mask & AC_ERR_TIMEOUT) | |
1262 | return "timeout"; | |
1263 | if (err_mask & AC_ERR_HSM) | |
1264 | return "HSM violation"; | |
1265 | if (err_mask & AC_ERR_SYSTEM) | |
1266 | return "internal error"; | |
1267 | if (err_mask & AC_ERR_MEDIA) | |
1268 | return "media error"; | |
1269 | if (err_mask & AC_ERR_INVALID) | |
1270 | return "invalid argument"; | |
1271 | if (err_mask & AC_ERR_DEV) | |
1272 | return "device error"; | |
1273 | return "unknown error"; | |
1274 | } | |
1275 | ||
e8ee8451 TH |
1276 | /** |
1277 | * ata_read_log_page - read a specific log page | |
1278 | * @dev: target device | |
1279 | * @page: page to read | |
1280 | * @buf: buffer to store read page | |
1281 | * @sectors: number of sectors to read | |
1282 | * | |
1283 | * Read log page using READ_LOG_EXT command. | |
1284 | * | |
1285 | * LOCKING: | |
1286 | * Kernel thread context (may sleep). | |
1287 | * | |
1288 | * RETURNS: | |
1289 | * 0 on success, AC_ERR_* mask otherwise. | |
1290 | */ | |
1291 | static unsigned int ata_read_log_page(struct ata_device *dev, | |
1292 | u8 page, void *buf, unsigned int sectors) | |
1293 | { | |
1294 | struct ata_taskfile tf; | |
1295 | unsigned int err_mask; | |
1296 | ||
1297 | DPRINTK("read log page - page %d\n", page); | |
1298 | ||
1299 | ata_tf_init(dev, &tf); | |
1300 | tf.command = ATA_CMD_READ_LOG_EXT; | |
1301 | tf.lbal = page; | |
1302 | tf.nsect = sectors; | |
1303 | tf.hob_nsect = sectors >> 8; | |
1304 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
1305 | tf.protocol = ATA_PROT_PIO; | |
1306 | ||
1307 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1308 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 TH |
1309 | |
1310 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
1311 | return err_mask; | |
1312 | } | |
1313 | ||
1314 | /** | |
1315 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1316 | * @dev: Device to read log page 10h from | |
1317 | * @tag: Resulting tag of the failed command | |
1318 | * @tf: Resulting taskfile registers of the failed command | |
1319 | * | |
1320 | * Read log page 10h to obtain NCQ error details and clear error | |
1321 | * condition. | |
1322 | * | |
1323 | * LOCKING: | |
1324 | * Kernel thread context (may sleep). | |
1325 | * | |
1326 | * RETURNS: | |
1327 | * 0 on success, -errno otherwise. | |
1328 | */ | |
1329 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1330 | int *tag, struct ata_taskfile *tf) | |
1331 | { | |
9af5c9c9 | 1332 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1333 | unsigned int err_mask; |
1334 | u8 csum; | |
1335 | int i; | |
1336 | ||
1337 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); | |
1338 | if (err_mask) | |
1339 | return -EIO; | |
1340 | ||
1341 | csum = 0; | |
1342 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1343 | csum += buf[i]; | |
1344 | if (csum) | |
1345 | ata_dev_printk(dev, KERN_WARNING, | |
1346 | "invalid checksum 0x%x on log page 10h\n", csum); | |
1347 | ||
1348 | if (buf[0] & 0x80) | |
1349 | return -ENOENT; | |
1350 | ||
1351 | *tag = buf[0] & 0x1f; | |
1352 | ||
1353 | tf->command = buf[2]; | |
1354 | tf->feature = buf[3]; | |
1355 | tf->lbal = buf[4]; | |
1356 | tf->lbam = buf[5]; | |
1357 | tf->lbah = buf[6]; | |
1358 | tf->device = buf[7]; | |
1359 | tf->hob_lbal = buf[8]; | |
1360 | tf->hob_lbam = buf[9]; | |
1361 | tf->hob_lbah = buf[10]; | |
1362 | tf->nsect = buf[12]; | |
1363 | tf->hob_nsect = buf[13]; | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | ||
11fc33da TH |
1368 | /** |
1369 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1370 | * @dev: target ATAPI device | |
1371 | * @r_sense_key: out parameter for sense_key | |
1372 | * | |
1373 | * Perform ATAPI TEST_UNIT_READY. | |
1374 | * | |
1375 | * LOCKING: | |
1376 | * EH context (may sleep). | |
1377 | * | |
1378 | * RETURNS: | |
1379 | * 0 on success, AC_ERR_* mask on failure. | |
1380 | */ | |
1381 | static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) | |
1382 | { | |
1383 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1384 | struct ata_taskfile tf; | |
1385 | unsigned int err_mask; | |
1386 | ||
1387 | ata_tf_init(dev, &tf); | |
1388 | ||
1389 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1390 | tf.command = ATA_CMD_PACKET; | |
1391 | tf.protocol = ATAPI_PROT_NODATA; | |
1392 | ||
1393 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1394 | if (err_mask == AC_ERR_DEV) | |
1395 | *r_sense_key = tf.feature >> 4; | |
1396 | return err_mask; | |
1397 | } | |
1398 | ||
022bdb07 TH |
1399 | /** |
1400 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1401 | * @dev: device to perform REQUEST_SENSE to | |
1402 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1403 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1404 | * |
1405 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1406 | * SENSE. This function is EH helper. | |
1407 | * | |
1408 | * LOCKING: | |
1409 | * Kernel thread context (may sleep). | |
1410 | * | |
1411 | * RETURNS: | |
1412 | * 0 on success, AC_ERR_* mask on failure | |
1413 | */ | |
3eabddb8 TH |
1414 | static unsigned int atapi_eh_request_sense(struct ata_device *dev, |
1415 | u8 *sense_buf, u8 dfl_sense_key) | |
022bdb07 | 1416 | { |
3eabddb8 TH |
1417 | u8 cdb[ATAPI_CDB_LEN] = |
1418 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1419 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1420 | struct ata_taskfile tf; |
022bdb07 TH |
1421 | |
1422 | DPRINTK("ATAPI request sense\n"); | |
1423 | ||
022bdb07 TH |
1424 | /* FIXME: is this needed? */ |
1425 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
1426 | ||
56287768 AL |
1427 | /* initialize sense_buf with the error register, |
1428 | * for the case where they are -not- overwritten | |
1429 | */ | |
022bdb07 | 1430 | sense_buf[0] = 0x70; |
3eabddb8 | 1431 | sense_buf[2] = dfl_sense_key; |
56287768 | 1432 | |
a617c09f | 1433 | /* some devices time out if garbage left in tf */ |
56287768 | 1434 | ata_tf_init(dev, &tf); |
022bdb07 | 1435 | |
022bdb07 TH |
1436 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1437 | tf.command = ATA_CMD_PACKET; | |
1438 | ||
1439 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1440 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1441 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1442 | tf.feature |= ATAPI_PKT_DMA; |
1443 | } else { | |
0dc36888 | 1444 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1445 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1446 | tf.lbah = 0; | |
022bdb07 TH |
1447 | } |
1448 | ||
1449 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1450 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1451 | } |
1452 | ||
1453 | /** | |
1454 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1455 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1456 | * |
1457 | * Analyze SError if available and further determine cause of | |
1458 | * failure. | |
1459 | * | |
1460 | * LOCKING: | |
1461 | * None. | |
1462 | */ | |
0260731f | 1463 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1464 | { |
0260731f | 1465 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1466 | u32 serror = ehc->i.serror; |
1467 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1468 | u32 hotplug_mask; |
022bdb07 | 1469 | |
e0614db2 | 1470 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1471 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1472 | action |= ATA_EH_RESET; |
022bdb07 TH |
1473 | } |
1474 | if (serror & SERR_PROTOCOL) { | |
1475 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1476 | action |= ATA_EH_RESET; |
022bdb07 TH |
1477 | } |
1478 | if (serror & SERR_INTERNAL) { | |
1479 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1480 | action |= ATA_EH_RESET; |
022bdb07 | 1481 | } |
f9df58cb TH |
1482 | |
1483 | /* Determine whether a hotplug event has occurred. Both | |
1484 | * SError.N/X are considered hotplug events for enabled or | |
1485 | * host links. For disabled PMP links, only N bit is | |
1486 | * considered as X bit is left at 1 for link plugging. | |
1487 | */ | |
1488 | hotplug_mask = 0; | |
1489 | ||
1490 | if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
1491 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; | |
1492 | else | |
1493 | hotplug_mask = SERR_PHYRDY_CHG; | |
1494 | ||
1495 | if (serror & hotplug_mask) | |
084fe639 | 1496 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1497 | |
1498 | ehc->i.err_mask |= err_mask; | |
1499 | ehc->i.action |= action; | |
1500 | } | |
1501 | ||
e8ee8451 TH |
1502 | /** |
1503 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1504 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1505 | * |
1506 | * Read log page 10h, determine the offending qc and acquire | |
1507 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1508 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1509 | * care of the rest. | |
1510 | * | |
1511 | * LOCKING: | |
1512 | * Kernel thread context (may sleep). | |
1513 | */ | |
10acf3b0 | 1514 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1515 | { |
0260731f TH |
1516 | struct ata_port *ap = link->ap; |
1517 | struct ata_eh_context *ehc = &link->eh_context; | |
1518 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1519 | struct ata_queued_cmd *qc; |
1520 | struct ata_taskfile tf; | |
1521 | int tag, rc; | |
1522 | ||
1523 | /* if frozen, we can't do much */ | |
b51e9e5d | 1524 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1525 | return; |
1526 | ||
1527 | /* is it NCQ device error? */ | |
0260731f | 1528 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1529 | return; |
1530 | ||
1531 | /* has LLDD analyzed already? */ | |
1532 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1533 | qc = __ata_qc_from_tag(ap, tag); | |
1534 | ||
1535 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1536 | continue; | |
1537 | ||
1538 | if (qc->err_mask) | |
1539 | return; | |
1540 | } | |
1541 | ||
1542 | /* okay, this error is ours */ | |
1543 | rc = ata_eh_read_log_10h(dev, &tag, &tf); | |
1544 | if (rc) { | |
0260731f | 1545 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
e8ee8451 TH |
1546 | "(errno=%d)\n", rc); |
1547 | return; | |
1548 | } | |
1549 | ||
0260731f TH |
1550 | if (!(link->sactive & (1 << tag))) { |
1551 | ata_link_printk(link, KERN_ERR, "log page 10h reported " | |
e8ee8451 TH |
1552 | "inactive tag %d\n", tag); |
1553 | return; | |
1554 | } | |
1555 | ||
1556 | /* we've got the perpetrator, condemn it */ | |
1557 | qc = __ata_qc_from_tag(ap, tag); | |
1558 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1559 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1560 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
e8ee8451 TH |
1561 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1562 | } | |
1563 | ||
022bdb07 TH |
1564 | /** |
1565 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1566 | * @qc: qc to analyze | |
1567 | * @tf: Taskfile registers to analyze | |
1568 | * | |
1569 | * Analyze taskfile of @qc and further determine cause of | |
1570 | * failure. This function also requests ATAPI sense data if | |
1571 | * avaliable. | |
1572 | * | |
1573 | * LOCKING: | |
1574 | * Kernel thread context (may sleep). | |
1575 | * | |
1576 | * RETURNS: | |
1577 | * Determined recovery action | |
1578 | */ | |
1579 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1580 | const struct ata_taskfile *tf) | |
1581 | { | |
1582 | unsigned int tmp, action = 0; | |
1583 | u8 stat = tf->command, err = tf->feature; | |
1584 | ||
1585 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1586 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1587 | return ATA_EH_RESET; |
022bdb07 TH |
1588 | } |
1589 | ||
a51d644a TH |
1590 | if (stat & (ATA_ERR | ATA_DF)) |
1591 | qc->err_mask |= AC_ERR_DEV; | |
1592 | else | |
022bdb07 TH |
1593 | return 0; |
1594 | ||
1595 | switch (qc->dev->class) { | |
1596 | case ATA_DEV_ATA: | |
1597 | if (err & ATA_ICRC) | |
1598 | qc->err_mask |= AC_ERR_ATA_BUS; | |
1599 | if (err & ATA_UNC) | |
1600 | qc->err_mask |= AC_ERR_MEDIA; | |
1601 | if (err & ATA_IDNF) | |
1602 | qc->err_mask |= AC_ERR_INVALID; | |
1603 | break; | |
1604 | ||
1605 | case ATA_DEV_ATAPI: | |
a569a30d | 1606 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1607 | tmp = atapi_eh_request_sense(qc->dev, |
1608 | qc->scsicmd->sense_buffer, | |
1609 | qc->result_tf.feature >> 4); | |
a569a30d TH |
1610 | if (!tmp) { |
1611 | /* ATA_QCFLAG_SENSE_VALID is used to | |
1612 | * tell atapi_qc_complete() that sense | |
1613 | * data is already valid. | |
1614 | * | |
1615 | * TODO: interpret sense data and set | |
1616 | * appropriate err_mask. | |
1617 | */ | |
1618 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
1619 | } else | |
1620 | qc->err_mask |= tmp; | |
1621 | } | |
022bdb07 TH |
1622 | } |
1623 | ||
1624 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) | |
cf480626 | 1625 | action |= ATA_EH_RESET; |
022bdb07 TH |
1626 | |
1627 | return action; | |
1628 | } | |
1629 | ||
76326ac1 TH |
1630 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1631 | int *xfer_ok) | |
022bdb07 | 1632 | { |
76326ac1 TH |
1633 | int base = 0; |
1634 | ||
1635 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1636 | *xfer_ok = 1; | |
1637 | ||
1638 | if (!*xfer_ok) | |
75f9cafc | 1639 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1640 | |
7d47e8d4 | 1641 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1642 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1643 | |
7d47e8d4 | 1644 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1645 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1646 | |
3884f7b0 | 1647 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1648 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1649 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1650 | if ((err_mask & |
1651 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1652 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1653 | } |
1654 | ||
1655 | return 0; | |
1656 | } | |
1657 | ||
7d47e8d4 | 1658 | struct speed_down_verdict_arg { |
022bdb07 | 1659 | u64 since; |
76326ac1 | 1660 | int xfer_ok; |
3884f7b0 | 1661 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1662 | }; |
1663 | ||
7d47e8d4 | 1664 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1665 | { |
7d47e8d4 | 1666 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1667 | int cat; |
022bdb07 TH |
1668 | |
1669 | if (ent->timestamp < arg->since) | |
1670 | return -1; | |
1671 | ||
76326ac1 TH |
1672 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1673 | &arg->xfer_ok); | |
7d47e8d4 | 1674 | arg->nr_errors[cat]++; |
76326ac1 | 1675 | |
022bdb07 TH |
1676 | return 0; |
1677 | } | |
1678 | ||
1679 | /** | |
7d47e8d4 | 1680 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1681 | * @dev: Device of interest |
1682 | * | |
1683 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1684 | * whether NCQ needs to be turned off, transfer speed should be |
1685 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1686 | * |
3884f7b0 TH |
1687 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1688 | * | |
1689 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1690 | * IO commands | |
1691 | * | |
1692 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1693 | * | |
76326ac1 TH |
1694 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1695 | * data transfer hasn't been verified. | |
1696 | * | |
3884f7b0 TH |
1697 | * Verdicts are |
1698 | * | |
1699 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1700 | * |
3884f7b0 TH |
1701 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1702 | * to PIO. | |
7d47e8d4 | 1703 | * |
3884f7b0 | 1704 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1705 | * |
3884f7b0 | 1706 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1707 | * taken per error. An action triggered by non-DUBIOUS errors |
1708 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1709 | * This is to expedite speed down decisions right after device is | |
1710 | * initially configured. | |
1711 | * | |
1712 | * The followings are speed down rules. #1 and #2 deal with | |
1713 | * DUBIOUS errors. | |
7d47e8d4 | 1714 | * |
76326ac1 TH |
1715 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1716 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1717 | * | |
1718 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1719 | * occurred during last 5 mins, NCQ_OFF. | |
1720 | * | |
1721 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
3884f7b0 | 1722 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1723 | * |
76326ac1 | 1724 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1725 | * during last 10 mins, NCQ_OFF. |
1726 | * | |
76326ac1 | 1727 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1728 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1729 | * |
022bdb07 TH |
1730 | * LOCKING: |
1731 | * Inherited from caller. | |
1732 | * | |
1733 | * RETURNS: | |
7d47e8d4 | 1734 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1735 | */ |
7d47e8d4 | 1736 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1737 | { |
7d47e8d4 TH |
1738 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1739 | u64 j64 = get_jiffies_64(); | |
1740 | struct speed_down_verdict_arg arg; | |
1741 | unsigned int verdict = 0; | |
022bdb07 | 1742 | |
3884f7b0 | 1743 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1744 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1745 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1746 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1747 | |
76326ac1 TH |
1748 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1749 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1750 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1751 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1752 | ||
1753 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1754 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1755 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1756 | ||
3884f7b0 TH |
1757 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1758 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1759 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1760 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1761 | |
3884f7b0 | 1762 | /* scan past 10 mins of error history */ |
022bdb07 | 1763 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1764 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1765 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1766 | |
3884f7b0 TH |
1767 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1768 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1769 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1770 | ||
1771 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1772 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1773 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1774 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1775 | |
7d47e8d4 | 1776 | return verdict; |
022bdb07 TH |
1777 | } |
1778 | ||
1779 | /** | |
1780 | * ata_eh_speed_down - record error and speed down if necessary | |
1781 | * @dev: Failed device | |
3884f7b0 | 1782 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1783 | * @err_mask: err_mask of the error |
1784 | * | |
1785 | * Record error and examine error history to determine whether | |
1786 | * adjusting transmission speed is necessary. It also sets | |
1787 | * transmission limits appropriately if such adjustment is | |
1788 | * necessary. | |
1789 | * | |
1790 | * LOCKING: | |
1791 | * Kernel thread context (may sleep). | |
1792 | * | |
1793 | * RETURNS: | |
7d47e8d4 | 1794 | * Determined recovery action. |
022bdb07 | 1795 | */ |
3884f7b0 TH |
1796 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1797 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1798 | { |
b1c72916 | 1799 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 1800 | int xfer_ok = 0; |
7d47e8d4 TH |
1801 | unsigned int verdict; |
1802 | unsigned int action = 0; | |
1803 | ||
1804 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1805 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1806 | return 0; |
1807 | ||
1808 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1809 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1810 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1811 | |
7d47e8d4 TH |
1812 | /* turn off NCQ? */ |
1813 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1814 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1815 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1816 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
1817 | ata_dev_printk(dev, KERN_WARNING, | |
1818 | "NCQ disabled due to excessive errors\n"); | |
1819 | goto done; | |
1820 | } | |
022bdb07 | 1821 | |
7d47e8d4 TH |
1822 | /* speed down? */ |
1823 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1824 | /* speed down SATA link speed if possible */ | |
3884f7b0 | 1825 | if (sata_down_spd_limit(link) == 0) { |
cf480626 | 1826 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1827 | goto done; |
1828 | } | |
022bdb07 | 1829 | |
7d47e8d4 TH |
1830 | /* lower transfer mode */ |
1831 | if (dev->spdn_cnt < 2) { | |
1832 | static const int dma_dnxfer_sel[] = | |
1833 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1834 | static const int pio_dnxfer_sel[] = | |
1835 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1836 | int sel; | |
1837 | ||
1838 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1839 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1840 | else | |
1841 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1842 | ||
1843 | dev->spdn_cnt++; | |
1844 | ||
1845 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1846 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1847 | goto done; |
1848 | } | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1853 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1854 | */ |
1855 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1856 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1857 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1858 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1859 | dev->spdn_cnt = 0; | |
cf480626 | 1860 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1861 | goto done; |
1862 | } | |
1863 | } | |
022bdb07 | 1864 | |
022bdb07 | 1865 | return 0; |
7d47e8d4 TH |
1866 | done: |
1867 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1868 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1869 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1870 | return action; |
022bdb07 TH |
1871 | } |
1872 | ||
1873 | /** | |
9b1e2658 TH |
1874 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1875 | * @link: host link to perform autopsy on | |
022bdb07 | 1876 | * |
0260731f TH |
1877 | * Analyze why @link failed and determine which recovery actions |
1878 | * are needed. This function also sets more detailed AC_ERR_* | |
1879 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1880 | * |
1881 | * LOCKING: | |
1882 | * Kernel thread context (may sleep). | |
1883 | */ | |
9b1e2658 | 1884 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1885 | { |
0260731f | 1886 | struct ata_port *ap = link->ap; |
936fd732 | 1887 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 1888 | struct ata_device *dev; |
3884f7b0 TH |
1889 | unsigned int all_err_mask = 0, eflags = 0; |
1890 | int tag; | |
022bdb07 TH |
1891 | u32 serror; |
1892 | int rc; | |
1893 | ||
1894 | DPRINTK("ENTER\n"); | |
1895 | ||
1cdaf534 TH |
1896 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1897 | return; | |
1898 | ||
022bdb07 | 1899 | /* obtain and analyze SError */ |
936fd732 | 1900 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1901 | if (rc == 0) { |
1902 | ehc->i.serror |= serror; | |
0260731f | 1903 | ata_eh_analyze_serror(link); |
4e57c517 | 1904 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 1905 | /* SError read failed, force reset and probing */ |
b558eddd | 1906 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 1907 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
1908 | ehc->i.err_mask |= AC_ERR_OTHER; |
1909 | } | |
022bdb07 | 1910 | |
e8ee8451 | 1911 | /* analyze NCQ failure */ |
0260731f | 1912 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 1913 | |
022bdb07 TH |
1914 | /* any real error trumps AC_ERR_OTHER */ |
1915 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
1916 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
1917 | ||
1918 | all_err_mask |= ehc->i.err_mask; | |
1919 | ||
1920 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1921 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1922 | ||
b1c72916 TH |
1923 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
1924 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
1925 | continue; |
1926 | ||
1927 | /* inherit upper level err_mask */ | |
1928 | qc->err_mask |= ehc->i.err_mask; | |
1929 | ||
022bdb07 | 1930 | /* analyze TF */ |
4528e4da | 1931 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
1932 | |
1933 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
1934 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
1935 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
1936 | AC_ERR_INVALID); | |
1937 | ||
1938 | /* any real error trumps unknown error */ | |
1939 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1940 | qc->err_mask &= ~AC_ERR_OTHER; | |
1941 | ||
1942 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 1943 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 1944 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 | 1945 | |
03faab78 TH |
1946 | /* determine whether the command is worth retrying */ |
1947 | if (!(qc->err_mask & AC_ERR_INVALID) && | |
1948 | ((qc->flags & ATA_QCFLAG_IO) || qc->err_mask != AC_ERR_DEV)) | |
1949 | qc->flags |= ATA_QCFLAG_RETRY; | |
1950 | ||
022bdb07 | 1951 | /* accumulate error info */ |
4528e4da | 1952 | ehc->i.dev = qc->dev; |
022bdb07 TH |
1953 | all_err_mask |= qc->err_mask; |
1954 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 1955 | eflags |= ATA_EFLAG_IS_IO; |
022bdb07 TH |
1956 | } |
1957 | ||
a20f33ff | 1958 | /* enforce default EH actions */ |
b51e9e5d | 1959 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 1960 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 1961 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
1962 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
1963 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 1964 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 1965 | |
dfcc173d TH |
1966 | /* If we have offending qcs and the associated failed device, |
1967 | * perform per-dev EH action only on the offending device. | |
1968 | */ | |
4528e4da | 1969 | if (ehc->i.dev) { |
4528e4da TH |
1970 | ehc->i.dev_action[ehc->i.dev->devno] |= |
1971 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
1972 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
1973 | } |
1974 | ||
2695e366 TH |
1975 | /* propagate timeout to host link */ |
1976 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
1977 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
1978 | ||
1979 | /* record error and consider speeding down */ | |
dfcc173d | 1980 | dev = ehc->i.dev; |
2695e366 TH |
1981 | if (!dev && ((ata_link_max_devices(link) == 1 && |
1982 | ata_dev_enabled(link->device)))) | |
1983 | dev = link->device; | |
dfcc173d | 1984 | |
76326ac1 TH |
1985 | if (dev) { |
1986 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
1987 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 1988 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 1989 | } |
dfcc173d | 1990 | |
022bdb07 TH |
1991 | DPRINTK("EXIT\n"); |
1992 | } | |
1993 | ||
1994 | /** | |
9b1e2658 TH |
1995 | * ata_eh_autopsy - analyze error and determine recovery action |
1996 | * @ap: host port to perform autopsy on | |
1997 | * | |
1998 | * Analyze all links of @ap and determine why they failed and | |
1999 | * which recovery actions are needed. | |
2000 | * | |
2001 | * LOCKING: | |
2002 | * Kernel thread context (may sleep). | |
2003 | */ | |
fb7fd614 | 2004 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2005 | { |
2006 | struct ata_link *link; | |
2007 | ||
2695e366 | 2008 | ata_port_for_each_link(link, ap) |
9b1e2658 | 2009 | ata_eh_link_autopsy(link); |
2695e366 | 2010 | |
b1c72916 TH |
2011 | /* Handle the frigging slave link. Autopsy is done similarly |
2012 | * but actions and flags are transferred over to the master | |
2013 | * link and handled from there. | |
2014 | */ | |
2015 | if (ap->slave_link) { | |
2016 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2017 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2018 | ||
848e4c68 TH |
2019 | /* transfer control flags from master to slave */ |
2020 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2021 | ||
2022 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2023 | ata_eh_link_autopsy(ap->slave_link); |
2024 | ||
848e4c68 | 2025 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2026 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2027 | mehc->i.action |= sehc->i.action; | |
2028 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2029 | mehc->i.flags |= sehc->i.flags; | |
2030 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2031 | } | |
2032 | ||
2695e366 TH |
2033 | /* Autopsy of fanout ports can affect host link autopsy. |
2034 | * Perform host link autopsy last. | |
2035 | */ | |
071f44b1 | 2036 | if (sata_pmp_attached(ap)) |
2695e366 | 2037 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2038 | } |
2039 | ||
2040 | /** | |
2041 | * ata_eh_link_report - report error handling to user | |
0260731f | 2042 | * @link: ATA link EH is going on |
022bdb07 TH |
2043 | * |
2044 | * Report EH to user. | |
2045 | * | |
2046 | * LOCKING: | |
2047 | * None. | |
2048 | */ | |
9b1e2658 | 2049 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2050 | { |
0260731f TH |
2051 | struct ata_port *ap = link->ap; |
2052 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2053 | const char *frozen, *desc; |
a1e10f7e | 2054 | char tries_buf[6]; |
022bdb07 TH |
2055 | int tag, nr_failed = 0; |
2056 | ||
94ff3d54 TH |
2057 | if (ehc->i.flags & ATA_EHI_QUIET) |
2058 | return; | |
2059 | ||
022bdb07 TH |
2060 | desc = NULL; |
2061 | if (ehc->i.desc[0] != '\0') | |
2062 | desc = ehc->i.desc; | |
2063 | ||
2064 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2065 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2066 | ||
b1c72916 TH |
2067 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2068 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2069 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2070 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2071 | continue; |
2072 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2073 | continue; | |
2074 | ||
2075 | nr_failed++; | |
2076 | } | |
2077 | ||
2078 | if (!nr_failed && !ehc->i.err_mask) | |
2079 | return; | |
2080 | ||
2081 | frozen = ""; | |
b51e9e5d | 2082 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2083 | frozen = " frozen"; |
2084 | ||
a1e10f7e TH |
2085 | memset(tries_buf, 0, sizeof(tries_buf)); |
2086 | if (ap->eh_tries < ATA_EH_MAX_TRIES) | |
2087 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", | |
2088 | ap->eh_tries); | |
2089 | ||
022bdb07 | 2090 | if (ehc->i.dev) { |
e8ee8451 | 2091 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2092 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2093 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2094 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2095 | if (desc) |
b64bbc39 | 2096 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
022bdb07 | 2097 | } else { |
0260731f | 2098 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2099 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2100 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2101 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2102 | if (desc) |
0260731f | 2103 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
022bdb07 TH |
2104 | } |
2105 | ||
1333e194 | 2106 | if (ehc->i.serror) |
da0e21d3 | 2107 | ata_link_printk(link, KERN_ERR, |
1333e194 RH |
2108 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2109 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2110 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2111 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2112 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2113 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2114 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2115 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2116 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2117 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2118 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2119 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2120 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2121 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2122 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2123 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2124 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2125 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
1333e194 | 2126 | |
022bdb07 TH |
2127 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
2128 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 2129 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2130 | const u8 *cdb = qc->cdb; |
2131 | char data_buf[20] = ""; | |
2132 | char cdb_buf[70] = ""; | |
022bdb07 | 2133 | |
0260731f | 2134 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2135 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2136 | continue; |
2137 | ||
abb6a889 TH |
2138 | if (qc->dma_dir != DMA_NONE) { |
2139 | static const char *dma_str[] = { | |
2140 | [DMA_BIDIRECTIONAL] = "bidi", | |
2141 | [DMA_TO_DEVICE] = "out", | |
2142 | [DMA_FROM_DEVICE] = "in", | |
2143 | }; | |
2144 | static const char *prot_str[] = { | |
2145 | [ATA_PROT_PIO] = "pio", | |
2146 | [ATA_PROT_DMA] = "dma", | |
2147 | [ATA_PROT_NCQ] = "ncq", | |
0dc36888 TH |
2148 | [ATAPI_PROT_PIO] = "pio", |
2149 | [ATAPI_PROT_DMA] = "dma", | |
abb6a889 TH |
2150 | }; |
2151 | ||
2152 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", | |
2153 | prot_str[qc->tf.protocol], qc->nbytes, | |
2154 | dma_str[qc->dma_dir]); | |
2155 | } | |
2156 | ||
e39eec13 | 2157 | if (ata_is_atapi(qc->tf.protocol)) |
abb6a889 TH |
2158 | snprintf(cdb_buf, sizeof(cdb_buf), |
2159 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " | |
2160 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", | |
2161 | cdb[0], cdb[1], cdb[2], cdb[3], | |
2162 | cdb[4], cdb[5], cdb[6], cdb[7], | |
2163 | cdb[8], cdb[9], cdb[10], cdb[11], | |
2164 | cdb[12], cdb[13], cdb[14], cdb[15]); | |
2165 | ||
8a937581 TH |
2166 | ata_dev_printk(qc->dev, KERN_ERR, |
2167 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " | |
abb6a889 | 2168 | "tag %d%s\n %s" |
8a937581 | 2169 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2170 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2171 | cmd->command, cmd->feature, cmd->nsect, |
2172 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2173 | cmd->hob_feature, cmd->hob_nsect, | |
2174 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2175 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2176 | res->command, res->feature, res->nsect, |
2177 | res->lbal, res->lbam, res->lbah, | |
2178 | res->hob_feature, res->hob_nsect, | |
2179 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2180 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2181 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 RH |
2182 | |
2183 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | | |
2dcb407e | 2184 | ATA_ERR)) { |
1333e194 RH |
2185 | if (res->command & ATA_BUSY) |
2186 | ata_dev_printk(qc->dev, KERN_ERR, | |
2dcb407e | 2187 | "status: { Busy }\n"); |
1333e194 RH |
2188 | else |
2189 | ata_dev_printk(qc->dev, KERN_ERR, | |
2190 | "status: { %s%s%s%s}\n", | |
2191 | res->command & ATA_DRDY ? "DRDY " : "", | |
2192 | res->command & ATA_DF ? "DF " : "", | |
2193 | res->command & ATA_DRQ ? "DRQ " : "", | |
2dcb407e | 2194 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2195 | } |
2196 | ||
2197 | if (cmd->command != ATA_CMD_PACKET && | |
2198 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | | |
2199 | ATA_ABORTED))) | |
2200 | ata_dev_printk(qc->dev, KERN_ERR, | |
2201 | "error: { %s%s%s%s}\n", | |
2202 | res->feature & ATA_ICRC ? "ICRC " : "", | |
2203 | res->feature & ATA_UNC ? "UNC " : "", | |
2204 | res->feature & ATA_IDNF ? "IDNF " : "", | |
2dcb407e | 2205 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
022bdb07 TH |
2206 | } |
2207 | } | |
2208 | ||
9b1e2658 TH |
2209 | /** |
2210 | * ata_eh_report - report error handling to user | |
2211 | * @ap: ATA port to report EH about | |
2212 | * | |
2213 | * Report EH to user. | |
2214 | * | |
2215 | * LOCKING: | |
2216 | * None. | |
2217 | */ | |
fb7fd614 | 2218 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2219 | { |
2220 | struct ata_link *link; | |
2221 | ||
2222 | __ata_port_for_each_link(link, ap) | |
2223 | ata_eh_link_report(link); | |
2224 | } | |
2225 | ||
cc0680a5 | 2226 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2227 | unsigned int *classes, unsigned long deadline, |
2228 | bool clear_classes) | |
d87fa38e | 2229 | { |
f58229f8 | 2230 | struct ata_device *dev; |
d87fa38e | 2231 | |
b1c72916 TH |
2232 | if (clear_classes) |
2233 | ata_link_for_each_dev(dev, link) | |
2234 | classes[dev->devno] = ATA_DEV_UNKNOWN; | |
d87fa38e | 2235 | |
f046519f | 2236 | return reset(link, classes, deadline); |
d87fa38e TH |
2237 | } |
2238 | ||
ae791c05 | 2239 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
5dbfc9cb | 2240 | int rc, const unsigned int *classes) |
664faf09 | 2241 | { |
45db2f6c | 2242 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2243 | return 0; |
5dbfc9cb TH |
2244 | if (rc == -EAGAIN) |
2245 | return 1; | |
071f44b1 | 2246 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2247 | return 1; |
664faf09 TH |
2248 | return 0; |
2249 | } | |
2250 | ||
fb7fd614 TH |
2251 | int ata_eh_reset(struct ata_link *link, int classify, |
2252 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2253 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2254 | { |
afaa5c37 | 2255 | struct ata_port *ap = link->ap; |
b1c72916 | 2256 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2257 | struct ata_eh_context *ehc = &link->eh_context; |
b1c72916 | 2258 | struct ata_eh_context *sehc = &slave->eh_context; |
664faf09 | 2259 | unsigned int *classes = ehc->classes; |
416dc9ed | 2260 | unsigned int lflags = link->flags; |
1cdaf534 | 2261 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2262 | int max_tries = 0, try = 0; |
b1c72916 | 2263 | struct ata_link *failed_link; |
f58229f8 | 2264 | struct ata_device *dev; |
416dc9ed | 2265 | unsigned long deadline, now; |
022bdb07 | 2266 | ata_reset_fn_t reset; |
afaa5c37 | 2267 | unsigned long flags; |
416dc9ed | 2268 | u32 sstatus; |
b1c72916 | 2269 | int nr_unknown, rc; |
022bdb07 | 2270 | |
932648b0 TH |
2271 | /* |
2272 | * Prepare to reset | |
2273 | */ | |
d8af0eb6 TH |
2274 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2275 | max_tries++; | |
05944bdf TH |
2276 | if (link->flags & ATA_LFLAG_NO_HRST) |
2277 | hardreset = NULL; | |
2278 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2279 | softreset = NULL; | |
d8af0eb6 | 2280 | |
0a2c0f56 TH |
2281 | now = jiffies; |
2282 | deadline = ata_deadline(ehc->last_reset, ATA_EH_RESET_COOL_DOWN); | |
2283 | if (time_before(now, deadline)) | |
2284 | schedule_timeout_uninterruptible(deadline - now); | |
2285 | ||
afaa5c37 TH |
2286 | spin_lock_irqsave(ap->lock, flags); |
2287 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2288 | spin_unlock_irqrestore(ap->lock, flags); | |
2289 | ||
cf480626 | 2290 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
0a2c0f56 | 2291 | ehc->last_reset = jiffies; |
13abf50d | 2292 | |
cdeab114 TH |
2293 | ata_link_for_each_dev(dev, link) { |
2294 | /* If we issue an SRST then an ATA drive (not ATAPI) | |
2295 | * may change configuration and be in PIO0 timing. If | |
2296 | * we do a hard reset (or are coming from power on) | |
2297 | * this is true for ATA or ATAPI. Until we've set a | |
2298 | * suitable controller mode we should not touch the | |
2299 | * bus as we may be talking too fast. | |
2300 | */ | |
2301 | dev->pio_mode = XFER_PIO_0; | |
2302 | ||
2303 | /* If the controller has a pio mode setup function | |
2304 | * then use it to set the chipset to rights. Don't | |
2305 | * touch the DMA setup as that will be dealt with when | |
2306 | * configuring devices. | |
2307 | */ | |
2308 | if (ap->ops->set_piomode) | |
2309 | ap->ops->set_piomode(ap, dev); | |
2310 | } | |
2311 | ||
cf480626 | 2312 | /* prefer hardreset */ |
932648b0 | 2313 | reset = NULL; |
cf480626 TH |
2314 | ehc->i.action &= ~ATA_EH_RESET; |
2315 | if (hardreset) { | |
2316 | reset = hardreset; | |
a674050e | 2317 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2318 | } else if (softreset) { |
cf480626 | 2319 | reset = softreset; |
a674050e | 2320 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2321 | } |
f5914a46 TH |
2322 | |
2323 | if (prereset) { | |
b1c72916 TH |
2324 | unsigned long deadline = ata_deadline(jiffies, |
2325 | ATA_EH_PRERESET_TIMEOUT); | |
2326 | ||
2327 | if (slave) { | |
2328 | sehc->i.action &= ~ATA_EH_RESET; | |
2329 | sehc->i.action |= ehc->i.action; | |
2330 | } | |
2331 | ||
2332 | rc = prereset(link, deadline); | |
2333 | ||
2334 | /* If present, do prereset on slave link too. Reset | |
2335 | * is skipped iff both master and slave links report | |
2336 | * -ENOENT or clear ATA_EH_RESET. | |
2337 | */ | |
2338 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2339 | int tmp; | |
2340 | ||
2341 | tmp = prereset(slave, deadline); | |
2342 | if (tmp != -ENOENT) | |
2343 | rc = tmp; | |
2344 | ||
2345 | ehc->i.action |= sehc->i.action; | |
2346 | } | |
2347 | ||
f5914a46 | 2348 | if (rc) { |
c961922b | 2349 | if (rc == -ENOENT) { |
cc0680a5 | 2350 | ata_link_printk(link, KERN_DEBUG, |
4aa9ab67 | 2351 | "port disabled. ignoring.\n"); |
cf480626 | 2352 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2353 | |
936fd732 | 2354 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2355 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2356 | |
2357 | rc = 0; | |
c961922b | 2358 | } else |
cc0680a5 | 2359 | ata_link_printk(link, KERN_ERR, |
f5914a46 | 2360 | "prereset failed (errno=%d)\n", rc); |
fccb6ea5 | 2361 | goto out; |
f5914a46 | 2362 | } |
f5914a46 | 2363 | |
932648b0 TH |
2364 | /* prereset() might have cleared ATA_EH_RESET. If so, |
2365 | * bang classes and return. | |
2366 | */ | |
2367 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
2368 | ata_link_for_each_dev(dev, link) | |
2369 | classes[dev->devno] = ATA_DEV_NONE; | |
2370 | rc = 0; | |
2371 | goto out; | |
2372 | } | |
f5914a46 TH |
2373 | } |
2374 | ||
022bdb07 | 2375 | retry: |
932648b0 TH |
2376 | /* |
2377 | * Perform reset | |
2378 | */ | |
0a2c0f56 | 2379 | ehc->last_reset = jiffies; |
dc98c32c TH |
2380 | if (ata_is_host_link(link)) |
2381 | ata_eh_freeze_port(ap); | |
2382 | ||
341c2c95 | 2383 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2384 | |
932648b0 TH |
2385 | if (reset) { |
2386 | if (verbose) | |
2387 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", | |
2388 | reset == softreset ? "soft" : "hard"); | |
2389 | ||
2390 | /* mark that this EH session started with reset */ | |
2391 | if (reset == hardreset) | |
2392 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2393 | else | |
2394 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2395 | |
b1c72916 TH |
2396 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2397 | if (rc && rc != -EAGAIN) { | |
2398 | failed_link = link; | |
5dbfc9cb | 2399 | goto fail; |
b1c72916 TH |
2400 | } |
2401 | ||
2402 | /* hardreset slave link if existent */ | |
2403 | if (slave && reset == hardreset) { | |
2404 | int tmp; | |
2405 | ||
2406 | if (verbose) | |
2407 | ata_link_printk(slave, KERN_INFO, | |
2408 | "hard resetting link\n"); | |
2409 | ||
2410 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2411 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2412 | false); | |
2413 | switch (tmp) { | |
2414 | case -EAGAIN: | |
2415 | rc = -EAGAIN; | |
2416 | case 0: | |
2417 | break; | |
2418 | default: | |
2419 | failed_link = slave; | |
2420 | rc = tmp; | |
2421 | goto fail; | |
2422 | } | |
2423 | } | |
022bdb07 | 2424 | |
b1c72916 | 2425 | /* perform follow-up SRST if necessary */ |
932648b0 | 2426 | if (reset == hardreset && |
5dbfc9cb | 2427 | ata_eh_followup_srst_needed(link, rc, classes)) { |
932648b0 | 2428 | reset = softreset; |
022bdb07 | 2429 | |
932648b0 TH |
2430 | if (!reset) { |
2431 | ata_link_printk(link, KERN_ERR, | |
2432 | "follow-up softreset required " | |
2433 | "but no softreset avaliable\n"); | |
b1c72916 | 2434 | failed_link = link; |
932648b0 TH |
2435 | rc = -EINVAL; |
2436 | goto fail; | |
2437 | } | |
664faf09 | 2438 | |
932648b0 | 2439 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2440 | rc = ata_do_reset(link, reset, classes, deadline, true); |
664faf09 | 2441 | } |
932648b0 TH |
2442 | } else { |
2443 | if (verbose) | |
2444 | ata_link_printk(link, KERN_INFO, "no reset method " | |
2445 | "available, skipping reset\n"); | |
2446 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) | |
2447 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2448 | } |
2449 | ||
932648b0 TH |
2450 | /* |
2451 | * Post-reset processing | |
2452 | */ | |
416dc9ed TH |
2453 | ata_link_for_each_dev(dev, link) { |
2454 | /* After the reset, the device state is PIO 0 and the | |
2455 | * controller state is undefined. Reset also wakes up | |
2456 | * drives from sleeping mode. | |
2457 | */ | |
2458 | dev->pio_mode = XFER_PIO_0; | |
2459 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2460 | |
816ab897 TH |
2461 | if (!ata_phys_link_offline(ata_dev_phys_link(dev))) { |
2462 | /* apply class override */ | |
2463 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2464 | classes[dev->devno] = ATA_DEV_ATA; | |
2465 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2466 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
2467 | } else | |
2468 | classes[dev->devno] = ATA_DEV_NONE; | |
022bdb07 TH |
2469 | } |
2470 | ||
416dc9ed TH |
2471 | /* record current link speed */ |
2472 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2473 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2474 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2475 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2476 | |
dc98c32c TH |
2477 | /* thaw the port */ |
2478 | if (ata_is_host_link(link)) | |
2479 | ata_eh_thaw_port(ap); | |
2480 | ||
f046519f TH |
2481 | /* postreset() should clear hardware SError. Although SError |
2482 | * is cleared during link resume, clearing SError here is | |
2483 | * necessary as some PHYs raise hotplug events after SRST. | |
2484 | * This introduces race condition where hotplug occurs between | |
2485 | * reset and here. This race is mediated by cross checking | |
2486 | * link onlineness and classification result later. | |
2487 | */ | |
b1c72916 | 2488 | if (postreset) { |
416dc9ed | 2489 | postreset(link, classes); |
b1c72916 TH |
2490 | if (slave) |
2491 | postreset(slave, classes); | |
2492 | } | |
20952b69 | 2493 | |
f046519f TH |
2494 | /* clear cached SError */ |
2495 | spin_lock_irqsave(link->ap->lock, flags); | |
2496 | link->eh_info.serror = 0; | |
b1c72916 TH |
2497 | if (slave) |
2498 | slave->eh_info.serror = 0; | |
f046519f TH |
2499 | spin_unlock_irqrestore(link->ap->lock, flags); |
2500 | ||
2501 | /* Make sure onlineness and classification result correspond. | |
2502 | * Hotplug could have happened during reset and some | |
2503 | * controllers fail to wait while a drive is spinning up after | |
2504 | * being hotplugged causing misdetection. By cross checking | |
2505 | * link onlineness and classification result, those conditions | |
2506 | * can be reliably detected and retried. | |
2507 | */ | |
b1c72916 | 2508 | nr_unknown = 0; |
f046519f TH |
2509 | ata_link_for_each_dev(dev, link) { |
2510 | /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */ | |
b1c72916 | 2511 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { |
f046519f | 2512 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 TH |
2513 | if (ata_phys_link_online(ata_dev_phys_link(dev))) |
2514 | nr_unknown++; | |
2515 | } | |
f046519f TH |
2516 | } |
2517 | ||
b1c72916 | 2518 | if (classify && nr_unknown) { |
f046519f TH |
2519 | if (try < max_tries) { |
2520 | ata_link_printk(link, KERN_WARNING, "link online but " | |
2521 | "device misclassified, retrying\n"); | |
b1c72916 | 2522 | failed_link = link; |
f046519f TH |
2523 | rc = -EAGAIN; |
2524 | goto fail; | |
2525 | } | |
2526 | ata_link_printk(link, KERN_WARNING, | |
2527 | "link online but device misclassified, " | |
2528 | "device detection might fail\n"); | |
2529 | } | |
2530 | ||
416dc9ed | 2531 | /* reset successful, schedule revalidation */ |
cf480626 | 2532 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2533 | if (slave) |
2534 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
0a2c0f56 | 2535 | ehc->last_reset = jiffies; |
416dc9ed | 2536 | ehc->i.action |= ATA_EH_REVALIDATE; |
ae791c05 | 2537 | |
416dc9ed | 2538 | rc = 0; |
fccb6ea5 TH |
2539 | out: |
2540 | /* clear hotplug flag */ | |
2541 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2542 | if (slave) |
2543 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2544 | |
2545 | spin_lock_irqsave(ap->lock, flags); | |
2546 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2547 | spin_unlock_irqrestore(ap->lock, flags); | |
2548 | ||
022bdb07 | 2549 | return rc; |
416dc9ed TH |
2550 | |
2551 | fail: | |
5958e302 TH |
2552 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2553 | if (!ata_is_host_link(link) && | |
2554 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2555 | rc = -ERESTART; | |
2556 | ||
416dc9ed TH |
2557 | if (rc == -ERESTART || try >= max_tries) |
2558 | goto out; | |
2559 | ||
2560 | now = jiffies; | |
2561 | if (time_before(now, deadline)) { | |
2562 | unsigned long delta = deadline - now; | |
2563 | ||
b1c72916 | 2564 | ata_link_printk(failed_link, KERN_WARNING, |
0a2c0f56 TH |
2565 | "reset failed (errno=%d), retrying in %u secs\n", |
2566 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed TH |
2567 | |
2568 | while (delta) | |
2569 | delta = schedule_timeout_uninterruptible(delta); | |
2570 | } | |
2571 | ||
b1c72916 | 2572 | if (try == max_tries - 1) { |
416dc9ed | 2573 | sata_down_spd_limit(link); |
b1c72916 TH |
2574 | if (slave) |
2575 | sata_down_spd_limit(slave); | |
2576 | } else if (rc == -EPIPE) | |
2577 | sata_down_spd_limit(failed_link); | |
2578 | ||
416dc9ed TH |
2579 | if (hardreset) |
2580 | reset = hardreset; | |
2581 | goto retry; | |
022bdb07 TH |
2582 | } |
2583 | ||
45fabbb7 EO |
2584 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
2585 | { | |
2586 | struct ata_link *link; | |
2587 | struct ata_device *dev; | |
2588 | unsigned long flags; | |
2589 | ||
2590 | /* | |
2591 | * This function can be thought of as an extended version of | |
2592 | * ata_eh_about_to_do() specially crafted to accommodate the | |
2593 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
2594 | * does not leave the do {} while () loop in ata_eh_recover as | |
2595 | * long as the timeout for a park request to *one* device on | |
2596 | * the port has not expired, and since we still want to pick | |
2597 | * up park requests to other devices on the same port or | |
2598 | * timeout updates for the same device, we have to pull | |
2599 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
2600 | * ourselves at the beginning of each pass over the loop. | |
2601 | * | |
2602 | * Additionally, all write accesses to &ap->park_req_pending | |
2603 | * through INIT_COMPLETION() (see below) or complete_all() | |
2604 | * (see ata_scsi_park_store()) are protected by the host lock. | |
2605 | * As a result we have that park_req_pending.done is zero on | |
2606 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
2607 | * *all* devices on port ap have been pulled into the | |
2608 | * respective eh_context structs. If, and only if, | |
2609 | * park_req_pending.done is non-zero by the time we reach | |
2610 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
2611 | * has been scheduled for at least one of the devices on port | |
2612 | * ap and we have to cycle over the do {} while () loop in | |
2613 | * ata_eh_recover() again. | |
2614 | */ | |
2615 | ||
2616 | spin_lock_irqsave(ap->lock, flags); | |
2617 | INIT_COMPLETION(ap->park_req_pending); | |
2618 | ata_port_for_each_link(link, ap) { | |
2619 | ata_link_for_each_dev(dev, link) { | |
2620 | struct ata_eh_info *ehi = &link->eh_info; | |
2621 | ||
2622 | link->eh_context.i.dev_action[dev->devno] |= | |
2623 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
2624 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
2625 | } | |
2626 | } | |
2627 | spin_unlock_irqrestore(ap->lock, flags); | |
2628 | } | |
2629 | ||
2630 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
2631 | { | |
2632 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2633 | struct ata_taskfile tf; | |
2634 | unsigned int err_mask; | |
2635 | ||
2636 | ata_tf_init(dev, &tf); | |
2637 | if (park) { | |
2638 | ehc->unloaded_mask |= 1 << dev->devno; | |
2639 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
2640 | tf.feature = 0x44; | |
2641 | tf.lbal = 0x4c; | |
2642 | tf.lbam = 0x4e; | |
2643 | tf.lbah = 0x55; | |
2644 | } else { | |
2645 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2646 | tf.command = ATA_CMD_CHK_POWER; | |
2647 | } | |
2648 | ||
2649 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
2650 | tf.protocol |= ATA_PROT_NODATA; | |
2651 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
2652 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
2653 | ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); | |
2654 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2655 | } | |
2656 | } | |
2657 | ||
0260731f | 2658 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2659 | struct ata_device **r_failed_dev) |
022bdb07 | 2660 | { |
0260731f TH |
2661 | struct ata_port *ap = link->ap; |
2662 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2663 | struct ata_device *dev; |
8c3c52a8 | 2664 | unsigned int new_mask = 0; |
084fe639 | 2665 | unsigned long flags; |
f58229f8 | 2666 | int rc = 0; |
022bdb07 TH |
2667 | |
2668 | DPRINTK("ENTER\n"); | |
2669 | ||
8c3c52a8 TH |
2670 | /* For PATA drive side cable detection to work, IDENTIFY must |
2671 | * be done backwards such that PDIAG- is released by the slave | |
2672 | * device before the master device is identified. | |
2673 | */ | |
0260731f | 2674 | ata_link_for_each_dev_reverse(dev, link) { |
f58229f8 TH |
2675 | unsigned int action = ata_eh_dev_action(dev); |
2676 | unsigned int readid_flags = 0; | |
022bdb07 | 2677 | |
bff04647 TH |
2678 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2679 | readid_flags |= ATA_READID_POSTRESET; | |
2680 | ||
9666f400 | 2681 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2682 | WARN_ON(dev->class == ATA_DEV_PMP); |
2683 | ||
b1c72916 | 2684 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 2685 | rc = -EIO; |
8c3c52a8 | 2686 | goto err; |
022bdb07 TH |
2687 | } |
2688 | ||
0260731f | 2689 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2690 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2691 | readid_flags); | |
022bdb07 | 2692 | if (rc) |
8c3c52a8 | 2693 | goto err; |
022bdb07 | 2694 | |
0260731f | 2695 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2696 | |
baa1e78a TH |
2697 | /* Configuration may have changed, reconfigure |
2698 | * transfer mode. | |
2699 | */ | |
2700 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2701 | ||
3057ac3c | 2702 | /* schedule the scsi_rescan_device() here */ |
2703 | queue_work(ata_aux_wq, &(ap->scsi_rescan_task)); | |
084fe639 TH |
2704 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2705 | ehc->tries[dev->devno] && | |
2706 | ata_class_enabled(ehc->classes[dev->devno])) { | |
2707 | dev->class = ehc->classes[dev->devno]; | |
2708 | ||
633273a3 TH |
2709 | if (dev->class == ATA_DEV_PMP) |
2710 | rc = sata_pmp_attach(dev); | |
2711 | else | |
2712 | rc = ata_dev_read_id(dev, &dev->class, | |
2713 | readid_flags, dev->id); | |
8c3c52a8 TH |
2714 | switch (rc) { |
2715 | case 0: | |
f58229f8 | 2716 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2717 | break; |
2718 | case -ENOENT: | |
55a8e2c8 TH |
2719 | /* IDENTIFY was issued to non-existent |
2720 | * device. No need to reset. Just | |
2721 | * thaw and kill the device. | |
2722 | */ | |
2723 | ata_eh_thaw_port(ap); | |
084fe639 TH |
2724 | dev->class = ATA_DEV_UNKNOWN; |
2725 | break; | |
8c3c52a8 TH |
2726 | default: |
2727 | dev->class = ATA_DEV_UNKNOWN; | |
2728 | goto err; | |
084fe639 | 2729 | } |
8c3c52a8 TH |
2730 | } |
2731 | } | |
084fe639 | 2732 | |
c1c4e8d5 | 2733 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
2734 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
2735 | if (ap->ops->cable_detect) | |
2736 | ap->cbl = ap->ops->cable_detect(ap); | |
2737 | ata_force_cbl(ap); | |
2738 | } | |
c1c4e8d5 | 2739 | |
8c3c52a8 TH |
2740 | /* Configure new devices forward such that user doesn't see |
2741 | * device detection messages backwards. | |
2742 | */ | |
0260731f | 2743 | ata_link_for_each_dev(dev, link) { |
633273a3 TH |
2744 | if (!(new_mask & (1 << dev->devno)) || |
2745 | dev->class == ATA_DEV_PMP) | |
8c3c52a8 TH |
2746 | continue; |
2747 | ||
2748 | ehc->i.flags |= ATA_EHI_PRINTINFO; | |
2749 | rc = ata_dev_configure(dev); | |
2750 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
2751 | if (rc) | |
2752 | goto err; | |
2753 | ||
2754 | spin_lock_irqsave(ap->lock, flags); | |
2755 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
2756 | spin_unlock_irqrestore(ap->lock, flags); | |
2757 | ||
2758 | /* new device discovered, configure xfermode */ | |
2759 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
2760 | } |
2761 | ||
8c3c52a8 | 2762 | return 0; |
022bdb07 | 2763 | |
8c3c52a8 TH |
2764 | err: |
2765 | *r_failed_dev = dev; | |
2766 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
2767 | return rc; |
2768 | } | |
2769 | ||
6f1d1e3a TH |
2770 | /** |
2771 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2772 | * @link: link on which timings will be programmed | |
2773 | * @r_failed_dev: out paramter for failed device | |
2774 | * | |
2775 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2776 | * ata_set_mode() fails, pointer to the failing device is | |
2777 | * returned in @r_failed_dev. | |
2778 | * | |
2779 | * LOCKING: | |
2780 | * PCI/etc. bus probe sem. | |
2781 | * | |
2782 | * RETURNS: | |
2783 | * 0 on success, negative errno otherwise | |
2784 | */ | |
2785 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
2786 | { | |
2787 | struct ata_port *ap = link->ap; | |
00115e0f TH |
2788 | struct ata_device *dev; |
2789 | int rc; | |
6f1d1e3a | 2790 | |
76326ac1 TH |
2791 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
2792 | ata_link_for_each_dev(dev, link) { | |
4a9c7b33 TH |
2793 | if (!ata_dev_enabled(dev)) |
2794 | continue; | |
2795 | ||
76326ac1 TH |
2796 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
2797 | struct ata_ering_entry *ent; | |
2798 | ||
2799 | ent = ata_ering_top(&dev->ering); | |
2800 | if (ent) | |
2801 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
2802 | } | |
2803 | } | |
2804 | ||
6f1d1e3a TH |
2805 | /* has private set_mode? */ |
2806 | if (ap->ops->set_mode) | |
00115e0f TH |
2807 | rc = ap->ops->set_mode(link, r_failed_dev); |
2808 | else | |
2809 | rc = ata_do_set_mode(link, r_failed_dev); | |
2810 | ||
2811 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
2812 | ata_link_for_each_dev(dev, link) { | |
2813 | struct ata_eh_context *ehc = &link->eh_context; | |
2814 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
2815 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
2816 | ||
4a9c7b33 TH |
2817 | if (!ata_dev_enabled(dev)) |
2818 | continue; | |
2819 | ||
00115e0f TH |
2820 | if (dev->xfer_mode != saved_xfer_mode || |
2821 | ata_ncq_enabled(dev) != saved_ncq) | |
2822 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
2823 | } | |
2824 | ||
2825 | return rc; | |
6f1d1e3a TH |
2826 | } |
2827 | ||
11fc33da TH |
2828 | /** |
2829 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
2830 | * @dev: ATAPI device to clear UA for | |
2831 | * | |
2832 | * Resets and other operations can make an ATAPI device raise | |
2833 | * UNIT ATTENTION which causes the next operation to fail. This | |
2834 | * function clears UA. | |
2835 | * | |
2836 | * LOCKING: | |
2837 | * EH context (may sleep). | |
2838 | * | |
2839 | * RETURNS: | |
2840 | * 0 on success, -errno on failure. | |
2841 | */ | |
2842 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
2843 | { | |
2844 | int i; | |
2845 | ||
2846 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
2847 | u8 sense_buffer[SCSI_SENSE_BUFFERSIZE]; | |
2848 | u8 sense_key = 0; | |
2849 | unsigned int err_mask; | |
2850 | ||
2851 | err_mask = atapi_eh_tur(dev, &sense_key); | |
2852 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
2853 | ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " | |
2854 | "failed (err_mask=0x%x)\n", err_mask); | |
2855 | return -EIO; | |
2856 | } | |
2857 | ||
2858 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
2859 | return 0; | |
2860 | ||
2861 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
2862 | if (err_mask) { | |
2863 | ata_dev_printk(dev, KERN_WARNING, "failed to clear " | |
2864 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); | |
2865 | return -EIO; | |
2866 | } | |
2867 | } | |
2868 | ||
2869 | ata_dev_printk(dev, KERN_WARNING, | |
2870 | "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); | |
2871 | ||
2872 | return 0; | |
2873 | } | |
2874 | ||
0260731f | 2875 | static int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 2876 | { |
f58229f8 TH |
2877 | struct ata_device *dev; |
2878 | int cnt = 0; | |
022bdb07 | 2879 | |
0260731f | 2880 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2881 | if (ata_dev_enabled(dev)) |
022bdb07 TH |
2882 | cnt++; |
2883 | return cnt; | |
2884 | } | |
2885 | ||
0260731f | 2886 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 2887 | { |
f58229f8 TH |
2888 | struct ata_device *dev; |
2889 | int cnt = 0; | |
084fe639 | 2890 | |
0260731f | 2891 | ata_link_for_each_dev(dev, link) |
f58229f8 | 2892 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
2893 | cnt++; |
2894 | return cnt; | |
2895 | } | |
2896 | ||
0260731f | 2897 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 2898 | { |
672b2d65 | 2899 | struct ata_port *ap = link->ap; |
0260731f | 2900 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 2901 | struct ata_device *dev; |
084fe639 | 2902 | |
f9df58cb TH |
2903 | /* skip disabled links */ |
2904 | if (link->flags & ATA_LFLAG_DISABLED) | |
2905 | return 1; | |
2906 | ||
672b2d65 TH |
2907 | /* thaw frozen port and recover failed devices */ |
2908 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
2909 | return 0; | |
2910 | ||
2911 | /* reset at least once if reset is requested */ | |
2912 | if ((ehc->i.action & ATA_EH_RESET) && | |
2913 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
2914 | return 0; |
2915 | ||
2916 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
0260731f | 2917 | ata_link_for_each_dev(dev, link) { |
084fe639 TH |
2918 | if (dev->class == ATA_DEV_UNKNOWN && |
2919 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
2920 | return 0; | |
2921 | } | |
2922 | ||
2923 | return 1; | |
2924 | } | |
2925 | ||
02c05a27 TH |
2926 | static int ata_eh_schedule_probe(struct ata_device *dev) |
2927 | { | |
2928 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2929 | ||
2930 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
2931 | (ehc->did_probe_mask & (1 << dev->devno))) | |
2932 | return 0; | |
2933 | ||
2934 | ata_eh_detach_dev(dev); | |
2935 | ata_dev_init(dev); | |
2936 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 2937 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
2938 | ehc->saved_xfer_mode[dev->devno] = 0; |
2939 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 TH |
2940 | |
2941 | return 1; | |
2942 | } | |
2943 | ||
9b1e2658 | 2944 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 2945 | { |
9af5c9c9 | 2946 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 TH |
2947 | |
2948 | ehc->tries[dev->devno]--; | |
2949 | ||
2950 | switch (err) { | |
2951 | case -ENODEV: | |
2952 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
2953 | ehc->i.probe_mask |= (1 << dev->devno); | |
2954 | case -EINVAL: | |
2955 | /* give it just one more chance */ | |
2956 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
2957 | case -EIO: | |
4fb4615b | 2958 | if (ehc->tries[dev->devno] == 1 && dev->pio_mode > XFER_PIO_0) { |
fee7ca72 TH |
2959 | /* This is the last chance, better to slow |
2960 | * down than lose it. | |
2961 | */ | |
b1c72916 | 2962 | sata_down_spd_limit(ata_dev_phys_link(dev)); |
fee7ca72 TH |
2963 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2964 | } | |
2965 | } | |
2966 | ||
2967 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
2968 | /* disable device if it has used up all its chances */ | |
2969 | ata_dev_disable(dev); | |
2970 | ||
2971 | /* detach if offline */ | |
b1c72916 | 2972 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
2973 | ata_eh_detach_dev(dev); |
2974 | ||
02c05a27 | 2975 | /* schedule probe if necessary */ |
87fbc5a0 | 2976 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 2977 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
2978 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
2979 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
2980 | } | |
9b1e2658 TH |
2981 | |
2982 | return 1; | |
fee7ca72 | 2983 | } else { |
cf480626 | 2984 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 2985 | return 0; |
fee7ca72 TH |
2986 | } |
2987 | } | |
2988 | ||
022bdb07 TH |
2989 | /** |
2990 | * ata_eh_recover - recover host port after error | |
2991 | * @ap: host port to recover | |
f5914a46 | 2992 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
2993 | * @softreset: softreset method (can be NULL) |
2994 | * @hardreset: hardreset method (can be NULL) | |
2995 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 2996 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
2997 | * |
2998 | * This is the alpha and omega, eum and yang, heart and soul of | |
2999 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3000 | * recover each link and hotplug requests are recorded in the |
3001 | * link's eh_context. This function executes all the operations | |
3002 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3003 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3004 | * |
3005 | * LOCKING: | |
3006 | * Kernel thread context (may sleep). | |
3007 | * | |
3008 | * RETURNS: | |
3009 | * 0 on success, -errno on failure. | |
3010 | */ | |
fb7fd614 TH |
3011 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3012 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3013 | ata_postreset_fn_t postreset, | |
3014 | struct ata_link **r_failed_link) | |
022bdb07 | 3015 | { |
9b1e2658 | 3016 | struct ata_link *link; |
022bdb07 | 3017 | struct ata_device *dev; |
0a2c0f56 | 3018 | int nr_failed_devs; |
dc98c32c | 3019 | int rc; |
45fabbb7 | 3020 | unsigned long flags, deadline; |
022bdb07 TH |
3021 | |
3022 | DPRINTK("ENTER\n"); | |
3023 | ||
3024 | /* prep for recovery */ | |
9b1e2658 TH |
3025 | ata_port_for_each_link(link, ap) { |
3026 | struct ata_eh_context *ehc = &link->eh_context; | |
084fe639 | 3027 | |
f9df58cb TH |
3028 | /* re-enable link? */ |
3029 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3030 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3031 | spin_lock_irqsave(ap->lock, flags); | |
3032 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3033 | spin_unlock_irqrestore(ap->lock, flags); | |
3034 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3035 | } | |
3036 | ||
9b1e2658 | 3037 | ata_link_for_each_dev(dev, link) { |
fd995f70 TH |
3038 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3039 | ehc->tries[dev->devno] = 1; | |
3040 | else | |
3041 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3042 | |
9b1e2658 TH |
3043 | /* collect port action mask recorded in dev actions */ |
3044 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3045 | ~ATA_EH_PERDEV_MASK; | |
3046 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3047 | ||
3048 | /* process hotplug request */ | |
3049 | if (dev->flags & ATA_DFLAG_DETACH) | |
3050 | ata_eh_detach_dev(dev); | |
3051 | ||
02c05a27 TH |
3052 | /* schedule probe if necessary */ |
3053 | if (!ata_dev_enabled(dev)) | |
3054 | ata_eh_schedule_probe(dev); | |
084fe639 | 3055 | } |
022bdb07 TH |
3056 | } |
3057 | ||
3058 | retry: | |
022bdb07 | 3059 | rc = 0; |
9b1e2658 | 3060 | nr_failed_devs = 0; |
022bdb07 | 3061 | |
aeb2ecd6 | 3062 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3063 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3064 | goto out; |
3065 | ||
9b1e2658 TH |
3066 | /* prep for EH */ |
3067 | ata_port_for_each_link(link, ap) { | |
3068 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 3069 | |
9b1e2658 TH |
3070 | /* skip EH if possible. */ |
3071 | if (ata_eh_skip_recovery(link)) | |
3072 | ehc->i.action = 0; | |
3073 | ||
9b1e2658 TH |
3074 | ata_link_for_each_dev(dev, link) |
3075 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; | |
3076 | } | |
084fe639 | 3077 | |
022bdb07 | 3078 | /* reset */ |
dc98c32c TH |
3079 | ata_port_for_each_link(link, ap) { |
3080 | struct ata_eh_context *ehc = &link->eh_context; | |
9b1e2658 | 3081 | |
dc98c32c TH |
3082 | if (!(ehc->i.action & ATA_EH_RESET)) |
3083 | continue; | |
9b1e2658 | 3084 | |
dc98c32c TH |
3085 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3086 | prereset, softreset, hardreset, postreset); | |
3087 | if (rc) { | |
3088 | ata_link_printk(link, KERN_ERR, | |
3089 | "reset failed, giving up\n"); | |
3090 | goto out; | |
022bdb07 | 3091 | } |
022bdb07 TH |
3092 | } |
3093 | ||
45fabbb7 EO |
3094 | do { |
3095 | unsigned long now; | |
3096 | ||
3097 | /* | |
3098 | * clears ATA_EH_PARK in eh_info and resets | |
3099 | * ap->park_req_pending | |
3100 | */ | |
3101 | ata_eh_pull_park_action(ap); | |
3102 | ||
3103 | deadline = jiffies; | |
3104 | ata_port_for_each_link(link, ap) { | |
3105 | ata_link_for_each_dev(dev, link) { | |
3106 | struct ata_eh_context *ehc = &link->eh_context; | |
3107 | unsigned long tmp; | |
3108 | ||
3109 | if (dev->class != ATA_DEV_ATA) | |
3110 | continue; | |
3111 | if (!(ehc->i.dev_action[dev->devno] & | |
3112 | ATA_EH_PARK)) | |
3113 | continue; | |
3114 | tmp = dev->unpark_deadline; | |
3115 | if (time_before(deadline, tmp)) | |
3116 | deadline = tmp; | |
3117 | else if (time_before_eq(tmp, jiffies)) | |
3118 | continue; | |
3119 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3120 | continue; | |
3121 | ||
3122 | ata_eh_park_issue_cmd(dev, 1); | |
3123 | } | |
3124 | } | |
3125 | ||
3126 | now = jiffies; | |
3127 | if (time_before_eq(deadline, now)) | |
3128 | break; | |
3129 | ||
3130 | deadline = wait_for_completion_timeout(&ap->park_req_pending, | |
3131 | deadline - now); | |
3132 | } while (deadline); | |
3133 | ata_port_for_each_link(link, ap) { | |
3134 | ata_link_for_each_dev(dev, link) { | |
3135 | if (!(link->eh_context.unloaded_mask & | |
3136 | (1 << dev->devno))) | |
3137 | continue; | |
3138 | ||
3139 | ata_eh_park_issue_cmd(dev, 0); | |
3140 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3141 | } | |
3142 | } | |
3143 | ||
9b1e2658 TH |
3144 | /* the rest */ |
3145 | ata_port_for_each_link(link, ap) { | |
3146 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 3147 | |
9b1e2658 TH |
3148 | /* revalidate existing devices and attach new ones */ |
3149 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3150 | if (rc) |
022bdb07 | 3151 | goto dev_fail; |
022bdb07 | 3152 | |
633273a3 TH |
3153 | /* if PMP got attached, return, pmp EH will take care of it */ |
3154 | if (link->device->class == ATA_DEV_PMP) { | |
3155 | ehc->i.action = 0; | |
3156 | return 0; | |
3157 | } | |
3158 | ||
9b1e2658 TH |
3159 | /* configure transfer mode if necessary */ |
3160 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3161 | rc = ata_set_mode(link, &dev); | |
3162 | if (rc) | |
3163 | goto dev_fail; | |
3164 | ehc->i.flags &= ~ATA_EHI_SETMODE; | |
3165 | } | |
3166 | ||
11fc33da TH |
3167 | /* If reset has been issued, clear UA to avoid |
3168 | * disrupting the current users of the device. | |
3169 | */ | |
3170 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
3171 | ata_link_for_each_dev(dev, link) { | |
3172 | if (dev->class != ATA_DEV_ATAPI) | |
3173 | continue; | |
3174 | rc = atapi_eh_clear_ua(dev); | |
3175 | if (rc) | |
3176 | goto dev_fail; | |
3177 | } | |
3178 | } | |
3179 | ||
3180 | /* configure link power saving */ | |
3ec25ebd | 3181 | if (ehc->i.action & ATA_EH_LPM) |
ca77329f KCA |
3182 | ata_link_for_each_dev(dev, link) |
3183 | ata_dev_enable_pm(dev, ap->pm_policy); | |
3184 | ||
9b1e2658 TH |
3185 | /* this link is okay now */ |
3186 | ehc->i.flags = 0; | |
3187 | continue; | |
022bdb07 | 3188 | |
2dcb407e | 3189 | dev_fail: |
9b1e2658 | 3190 | nr_failed_devs++; |
0a2c0f56 | 3191 | ata_eh_handle_dev_fail(dev, rc); |
022bdb07 | 3192 | |
b06ce3e5 TH |
3193 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3194 | /* PMP reset requires working host port. | |
3195 | * Can't retry if it's frozen. | |
3196 | */ | |
071f44b1 | 3197 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3198 | goto out; |
9b1e2658 | 3199 | break; |
b06ce3e5 | 3200 | } |
022bdb07 TH |
3201 | } |
3202 | ||
0a2c0f56 | 3203 | if (nr_failed_devs) |
9b1e2658 | 3204 | goto retry; |
022bdb07 | 3205 | |
9b1e2658 TH |
3206 | out: |
3207 | if (rc && r_failed_link) | |
3208 | *r_failed_link = link; | |
3209 | ||
022bdb07 TH |
3210 | DPRINTK("EXIT, rc=%d\n", rc); |
3211 | return rc; | |
3212 | } | |
3213 | ||
3214 | /** | |
3215 | * ata_eh_finish - finish up EH | |
3216 | * @ap: host port to finish EH for | |
3217 | * | |
3218 | * Recovery is complete. Clean up EH states and retry or finish | |
3219 | * failed qcs. | |
3220 | * | |
3221 | * LOCKING: | |
3222 | * None. | |
3223 | */ | |
fb7fd614 | 3224 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
3225 | { |
3226 | int tag; | |
3227 | ||
3228 | /* retry or finish qcs */ | |
3229 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
3230 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
3231 | ||
3232 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
3233 | continue; | |
3234 | ||
3235 | if (qc->err_mask) { | |
3236 | /* FIXME: Once EH migration is complete, | |
3237 | * generate sense data in this function, | |
3238 | * considering both err_mask and tf. | |
3239 | */ | |
03faab78 | 3240 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3241 | ata_eh_qc_retry(qc); |
03faab78 TH |
3242 | else |
3243 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3244 | } else { |
3245 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3246 | ata_eh_qc_complete(qc); | |
3247 | } else { | |
3248 | /* feed zero TF to sense generation */ | |
3249 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3250 | ata_eh_qc_retry(qc); | |
3251 | } | |
3252 | } | |
3253 | } | |
da917d69 TH |
3254 | |
3255 | /* make sure nr_active_links is zero after EH */ | |
3256 | WARN_ON(ap->nr_active_links); | |
3257 | ap->nr_active_links = 0; | |
022bdb07 TH |
3258 | } |
3259 | ||
3260 | /** | |
3261 | * ata_do_eh - do standard error handling | |
3262 | * @ap: host port to handle error for | |
a1efdaba | 3263 | * |
f5914a46 | 3264 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3265 | * @softreset: softreset method (can be NULL) |
3266 | * @hardreset: hardreset method (can be NULL) | |
3267 | * @postreset: postreset method (can be NULL) | |
3268 | * | |
3269 | * Perform standard error handling sequence. | |
3270 | * | |
3271 | * LOCKING: | |
3272 | * Kernel thread context (may sleep). | |
3273 | */ | |
f5914a46 TH |
3274 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3275 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3276 | ata_postreset_fn_t postreset) | |
022bdb07 | 3277 | { |
9b1e2658 TH |
3278 | struct ata_device *dev; |
3279 | int rc; | |
3280 | ||
3281 | ata_eh_autopsy(ap); | |
3282 | ata_eh_report(ap); | |
3283 | ||
3284 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3285 | NULL); | |
3286 | if (rc) { | |
3287 | ata_link_for_each_dev(dev, &ap->link) | |
3288 | ata_dev_disable(dev); | |
3289 | } | |
3290 | ||
022bdb07 TH |
3291 | ata_eh_finish(ap); |
3292 | } | |
500530f6 | 3293 | |
a1efdaba TH |
3294 | /** |
3295 | * ata_std_error_handler - standard error handler | |
3296 | * @ap: host port to handle error for | |
3297 | * | |
3298 | * Standard error handler | |
3299 | * | |
3300 | * LOCKING: | |
3301 | * Kernel thread context (may sleep). | |
3302 | */ | |
3303 | void ata_std_error_handler(struct ata_port *ap) | |
3304 | { | |
3305 | struct ata_port_operations *ops = ap->ops; | |
3306 | ata_reset_fn_t hardreset = ops->hardreset; | |
3307 | ||
57c9efdf TH |
3308 | /* ignore built-in hardreset if SCR access is not available */ |
3309 | if (ata_is_builtin_hardreset(hardreset) && !sata_scr_valid(&ap->link)) | |
a1efdaba TH |
3310 | hardreset = NULL; |
3311 | ||
3312 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
3313 | } | |
3314 | ||
6ffa01d8 | 3315 | #ifdef CONFIG_PM |
500530f6 TH |
3316 | /** |
3317 | * ata_eh_handle_port_suspend - perform port suspend operation | |
3318 | * @ap: port to suspend | |
3319 | * | |
3320 | * Suspend @ap. | |
3321 | * | |
3322 | * LOCKING: | |
3323 | * Kernel thread context (may sleep). | |
3324 | */ | |
3325 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
3326 | { | |
3327 | unsigned long flags; | |
3328 | int rc = 0; | |
3329 | ||
3330 | /* are we suspending? */ | |
3331 | spin_lock_irqsave(ap->lock, flags); | |
3332 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3333 | ap->pm_mesg.event == PM_EVENT_ON) { | |
3334 | spin_unlock_irqrestore(ap->lock, flags); | |
3335 | return; | |
3336 | } | |
3337 | spin_unlock_irqrestore(ap->lock, flags); | |
3338 | ||
3339 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
3340 | ||
64578a3d TH |
3341 | /* tell ACPI we're suspending */ |
3342 | rc = ata_acpi_on_suspend(ap); | |
3343 | if (rc) | |
3344 | goto out; | |
3345 | ||
500530f6 TH |
3346 | /* suspend */ |
3347 | ata_eh_freeze_port(ap); | |
3348 | ||
3349 | if (ap->ops->port_suspend) | |
3350 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
3351 | ||
bd3adca5 | 3352 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
64578a3d | 3353 | out: |
500530f6 TH |
3354 | /* report result */ |
3355 | spin_lock_irqsave(ap->lock, flags); | |
3356 | ||
3357 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
3358 | if (rc == 0) | |
3359 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 3360 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
3361 | ata_port_schedule_eh(ap); |
3362 | ||
3363 | if (ap->pm_result) { | |
3364 | *ap->pm_result = rc; | |
3365 | ap->pm_result = NULL; | |
3366 | } | |
3367 | ||
3368 | spin_unlock_irqrestore(ap->lock, flags); | |
3369 | ||
3370 | return; | |
3371 | } | |
3372 | ||
3373 | /** | |
3374 | * ata_eh_handle_port_resume - perform port resume operation | |
3375 | * @ap: port to resume | |
3376 | * | |
3377 | * Resume @ap. | |
3378 | * | |
500530f6 TH |
3379 | * LOCKING: |
3380 | * Kernel thread context (may sleep). | |
3381 | */ | |
3382 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
3383 | { | |
500530f6 | 3384 | unsigned long flags; |
9666f400 | 3385 | int rc = 0; |
500530f6 TH |
3386 | |
3387 | /* are we resuming? */ | |
3388 | spin_lock_irqsave(ap->lock, flags); | |
3389 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3390 | ap->pm_mesg.event != PM_EVENT_ON) { | |
3391 | spin_unlock_irqrestore(ap->lock, flags); | |
3392 | return; | |
3393 | } | |
3394 | spin_unlock_irqrestore(ap->lock, flags); | |
3395 | ||
9666f400 | 3396 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 3397 | |
bd3adca5 SL |
3398 | ata_acpi_set_state(ap, PMSG_ON); |
3399 | ||
500530f6 TH |
3400 | if (ap->ops->port_resume) |
3401 | rc = ap->ops->port_resume(ap); | |
3402 | ||
6746544c TH |
3403 | /* tell ACPI that we're resuming */ |
3404 | ata_acpi_on_resume(ap); | |
3405 | ||
9666f400 | 3406 | /* report result */ |
500530f6 TH |
3407 | spin_lock_irqsave(ap->lock, flags); |
3408 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
3409 | if (ap->pm_result) { | |
3410 | *ap->pm_result = rc; | |
3411 | ap->pm_result = NULL; | |
3412 | } | |
3413 | spin_unlock_irqrestore(ap->lock, flags); | |
3414 | } | |
6ffa01d8 | 3415 | #endif /* CONFIG_PM */ |