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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; | |
1eca4365 | 425 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 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) { | |
1eca4365 | 433 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
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 | ||
ece180d1 TH |
494 | static void ata_eh_unload(struct ata_port *ap) |
495 | { | |
496 | struct ata_link *link; | |
497 | struct ata_device *dev; | |
498 | unsigned long flags; | |
499 | ||
500 | /* Restore SControl IPM and SPD for the next driver and | |
501 | * disable attached devices. | |
502 | */ | |
503 | ata_for_each_link(link, ap, PMP_FIRST) { | |
504 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
505 | ata_for_each_dev(dev, link, ALL) | |
506 | ata_dev_disable(dev); | |
507 | } | |
508 | ||
509 | /* freeze and set UNLOADED */ | |
510 | spin_lock_irqsave(ap->lock, flags); | |
511 | ||
512 | ata_port_freeze(ap); /* won't be thawed */ | |
513 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
514 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
515 | ||
516 | spin_unlock_irqrestore(ap->lock, flags); | |
517 | } | |
518 | ||
ece1d636 TH |
519 | /** |
520 | * ata_scsi_error - SCSI layer error handler callback | |
521 | * @host: SCSI host on which error occurred | |
522 | * | |
523 | * Handles SCSI-layer-thrown error events. | |
524 | * | |
525 | * LOCKING: | |
526 | * Inherited from SCSI layer (none, can sleep) | |
527 | * | |
528 | * RETURNS: | |
529 | * Zero. | |
530 | */ | |
381544bb | 531 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 532 | { |
35bb94b1 | 533 | struct ata_port *ap = ata_shost_to_port(host); |
a1e10f7e | 534 | int i; |
ad9e2762 | 535 | unsigned long flags; |
ece1d636 TH |
536 | |
537 | DPRINTK("ENTER\n"); | |
538 | ||
ad9e2762 | 539 | /* synchronize with port task */ |
ece1d636 TH |
540 | ata_port_flush_task(ap); |
541 | ||
cca3974e | 542 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
543 | |
544 | /* For new EH, all qcs are finished in one of three ways - | |
545 | * normal completion, error completion, and SCSI timeout. | |
546 | * Both cmpletions can race against SCSI timeout. When normal | |
547 | * completion wins, the qc never reaches EH. When error | |
548 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
549 | * | |
550 | * When SCSI timeout wins, things are a bit more complex. | |
551 | * Normal or error completion can occur after the timeout but | |
552 | * before this point. In such cases, both types of | |
553 | * completions are honored. A scmd is determined to have | |
554 | * timed out iff its associated qc is active and not failed. | |
555 | */ | |
556 | if (ap->ops->error_handler) { | |
557 | struct scsi_cmnd *scmd, *tmp; | |
558 | int nr_timedout = 0; | |
559 | ||
e30349d2 | 560 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 TH |
561 | |
562 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { | |
563 | struct ata_queued_cmd *qc; | |
564 | ||
565 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
566 | qc = __ata_qc_from_tag(ap, i); | |
567 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
568 | qc->scsicmd == scmd) | |
569 | break; | |
570 | } | |
571 | ||
572 | if (i < ATA_MAX_QUEUE) { | |
573 | /* the scmd has an associated qc */ | |
574 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
575 | /* which hasn't failed yet, timeout */ | |
576 | qc->err_mask |= AC_ERR_TIMEOUT; | |
577 | qc->flags |= ATA_QCFLAG_FAILED; | |
578 | nr_timedout++; | |
579 | } | |
580 | } else { | |
581 | /* Normal completion occurred after | |
582 | * SCSI timeout but before this point. | |
583 | * Successfully complete it. | |
584 | */ | |
585 | scmd->retries = scmd->allowed; | |
586 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
587 | } | |
588 | } | |
589 | ||
590 | /* If we have timed out qcs. They belong to EH from | |
591 | * this point but the state of the controller is | |
592 | * unknown. Freeze the port to make sure the IRQ | |
593 | * handler doesn't diddle with those qcs. This must | |
594 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
595 | */ | |
596 | if (nr_timedout) | |
597 | __ata_port_freeze(ap); | |
598 | ||
e30349d2 | 599 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
600 | |
601 | /* initialize eh_tries */ | |
602 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 603 | } else |
e30349d2 | 604 | spin_unlock_wait(ap->lock); |
ad9e2762 TH |
605 | |
606 | repeat: | |
607 | /* invoke error handler */ | |
608 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
609 | struct ata_link *link; |
610 | ||
5ddf24c5 TH |
611 | /* kill fast drain timer */ |
612 | del_timer_sync(&ap->fastdrain_timer); | |
613 | ||
500530f6 TH |
614 | /* process port resume request */ |
615 | ata_eh_handle_port_resume(ap); | |
616 | ||
f3e81b19 | 617 | /* fetch & clear EH info */ |
e30349d2 | 618 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 619 | |
1eca4365 | 620 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
621 | struct ata_eh_context *ehc = &link->eh_context; |
622 | struct ata_device *dev; | |
623 | ||
cf1b86c8 TH |
624 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
625 | link->eh_context.i = link->eh_info; | |
626 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 627 | |
1eca4365 | 628 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
629 | int devno = dev->devno; |
630 | ||
631 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
632 | if (ata_ncq_enabled(dev)) | |
633 | ehc->saved_ncq_enabled |= 1 << devno; | |
634 | } | |
cf1b86c8 | 635 | } |
f3e81b19 | 636 | |
b51e9e5d TH |
637 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
638 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 639 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 640 | |
e30349d2 | 641 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 642 | |
500530f6 TH |
643 | /* invoke EH, skip if unloading or suspended */ |
644 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 645 | ap->ops->error_handler(ap); |
ece180d1 TH |
646 | else { |
647 | /* if unloading, commence suicide */ | |
648 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
649 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
650 | ata_eh_unload(ap); | |
720ba126 | 651 | ata_eh_finish(ap); |
ece180d1 | 652 | } |
ad9e2762 | 653 | |
500530f6 TH |
654 | /* process port suspend request */ |
655 | ata_eh_handle_port_suspend(ap); | |
656 | ||
ad9e2762 TH |
657 | /* Exception might have happend after ->error_handler |
658 | * recovered the port but before this point. Repeat | |
659 | * EH in such case. | |
660 | */ | |
e30349d2 | 661 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 662 | |
b51e9e5d | 663 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 664 | if (--ap->eh_tries) { |
e30349d2 | 665 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
666 | goto repeat; |
667 | } | |
668 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " | |
a1e10f7e | 669 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
914616a3 | 670 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
671 | } |
672 | ||
f3e81b19 | 673 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 674 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 675 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 676 | |
e30349d2 | 677 | /* Clear host_eh_scheduled while holding ap->lock such |
ad9e2762 TH |
678 | * that if exception occurs after this point but |
679 | * before EH completion, SCSI midlayer will | |
680 | * re-initiate EH. | |
681 | */ | |
682 | host->host_eh_scheduled = 0; | |
683 | ||
e30349d2 | 684 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 685 | } else { |
9af5c9c9 | 686 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
687 | ap->ops->eng_timeout(ap); |
688 | } | |
ece1d636 | 689 | |
ad9e2762 | 690 | /* finish or retry handled scmd's and clean up */ |
ece1d636 TH |
691 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
692 | ||
693 | scsi_eh_flush_done_q(&ap->eh_done_q); | |
694 | ||
ad9e2762 | 695 | /* clean up */ |
e30349d2 | 696 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 697 | |
1cdaf534 | 698 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 699 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 700 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
52bad64d | 701 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, 0); |
1cdaf534 TH |
702 | |
703 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
704 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); | |
580b2102 | 705 | |
b51e9e5d | 706 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 707 | |
c6cf9e99 | 708 | /* tell wait_eh that we're done */ |
b51e9e5d | 709 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
710 | wake_up_all(&ap->eh_wait_q); |
711 | ||
e30349d2 | 712 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 713 | |
ece1d636 | 714 | DPRINTK("EXIT\n"); |
ece1d636 TH |
715 | } |
716 | ||
c6cf9e99 TH |
717 | /** |
718 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
719 | * @ap: Port to wait EH for | |
720 | * | |
721 | * Wait until the currently pending EH is complete. | |
722 | * | |
723 | * LOCKING: | |
724 | * Kernel thread context (may sleep). | |
725 | */ | |
726 | void ata_port_wait_eh(struct ata_port *ap) | |
727 | { | |
728 | unsigned long flags; | |
729 | DEFINE_WAIT(wait); | |
730 | ||
731 | retry: | |
ba6a1308 | 732 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 733 | |
b51e9e5d | 734 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 735 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 736 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 737 | schedule(); |
ba6a1308 | 738 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 739 | } |
0a1b622e | 740 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 741 | |
ba6a1308 | 742 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
743 | |
744 | /* make sure SCSI EH is complete */ | |
cca3974e | 745 | if (scsi_host_in_recovery(ap->scsi_host)) { |
c6cf9e99 TH |
746 | msleep(10); |
747 | goto retry; | |
748 | } | |
749 | } | |
750 | ||
5ddf24c5 TH |
751 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
752 | { | |
753 | unsigned int tag; | |
754 | int nr = 0; | |
755 | ||
756 | /* count only non-internal commands */ | |
757 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
758 | if (ata_qc_from_tag(ap, tag)) | |
759 | nr++; | |
760 | ||
761 | return nr; | |
762 | } | |
763 | ||
764 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
765 | { | |
766 | struct ata_port *ap = (void *)arg; | |
767 | unsigned long flags; | |
768 | int cnt; | |
769 | ||
770 | spin_lock_irqsave(ap->lock, flags); | |
771 | ||
772 | cnt = ata_eh_nr_in_flight(ap); | |
773 | ||
774 | /* are we done? */ | |
775 | if (!cnt) | |
776 | goto out_unlock; | |
777 | ||
778 | if (cnt == ap->fastdrain_cnt) { | |
779 | unsigned int tag; | |
780 | ||
781 | /* No progress during the last interval, tag all | |
782 | * in-flight qcs as timed out and freeze the port. | |
783 | */ | |
784 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
785 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
786 | if (qc) | |
787 | qc->err_mask |= AC_ERR_TIMEOUT; | |
788 | } | |
789 | ||
790 | ata_port_freeze(ap); | |
791 | } else { | |
792 | /* some qcs have finished, give it another chance */ | |
793 | ap->fastdrain_cnt = cnt; | |
794 | ap->fastdrain_timer.expires = | |
341c2c95 | 795 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
796 | add_timer(&ap->fastdrain_timer); |
797 | } | |
798 | ||
799 | out_unlock: | |
800 | spin_unlock_irqrestore(ap->lock, flags); | |
801 | } | |
802 | ||
803 | /** | |
804 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
805 | * @ap: target ATA port | |
806 | * @fastdrain: activate fast drain | |
807 | * | |
808 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
809 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
810 | * that EH kicks in in timely manner. | |
811 | * | |
812 | * LOCKING: | |
813 | * spin_lock_irqsave(host lock) | |
814 | */ | |
815 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
816 | { | |
817 | int cnt; | |
818 | ||
819 | /* already scheduled? */ | |
820 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
821 | return; | |
822 | ||
823 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
824 | ||
825 | if (!fastdrain) | |
826 | return; | |
827 | ||
828 | /* do we have in-flight qcs? */ | |
829 | cnt = ata_eh_nr_in_flight(ap); | |
830 | if (!cnt) | |
831 | return; | |
832 | ||
833 | /* activate fast drain */ | |
834 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
835 | ap->fastdrain_timer.expires = |
836 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
837 | add_timer(&ap->fastdrain_timer); |
838 | } | |
839 | ||
f686bcb8 TH |
840 | /** |
841 | * ata_qc_schedule_eh - schedule qc for error handling | |
842 | * @qc: command to schedule error handling for | |
843 | * | |
844 | * Schedule error handling for @qc. EH will kick in as soon as | |
845 | * other commands are drained. | |
846 | * | |
847 | * LOCKING: | |
cca3974e | 848 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
849 | */ |
850 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
851 | { | |
852 | struct ata_port *ap = qc->ap; | |
853 | ||
854 | WARN_ON(!ap->ops->error_handler); | |
855 | ||
856 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 857 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
858 | |
859 | /* The following will fail if timeout has already expired. | |
860 | * ata_scsi_error() takes care of such scmds on EH entry. | |
861 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
862 | * this function completes. | |
863 | */ | |
242f9dcb | 864 | blk_abort_request(qc->scsicmd->request); |
f686bcb8 TH |
865 | } |
866 | ||
7b70fc03 TH |
867 | /** |
868 | * ata_port_schedule_eh - schedule error handling without a qc | |
869 | * @ap: ATA port to schedule EH for | |
870 | * | |
871 | * Schedule error handling for @ap. EH will kick in as soon as | |
872 | * all commands are drained. | |
873 | * | |
874 | * LOCKING: | |
cca3974e | 875 | * spin_lock_irqsave(host lock) |
7b70fc03 TH |
876 | */ |
877 | void ata_port_schedule_eh(struct ata_port *ap) | |
878 | { | |
879 | WARN_ON(!ap->ops->error_handler); | |
880 | ||
f4d6d004 TH |
881 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
882 | return; | |
883 | ||
5ddf24c5 | 884 | ata_eh_set_pending(ap, 1); |
cca3974e | 885 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
886 | |
887 | DPRINTK("port EH scheduled\n"); | |
888 | } | |
889 | ||
dbd82616 | 890 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
891 | { |
892 | int tag, nr_aborted = 0; | |
893 | ||
894 | WARN_ON(!ap->ops->error_handler); | |
895 | ||
5ddf24c5 TH |
896 | /* we're gonna abort all commands, no need for fast drain */ |
897 | ata_eh_set_pending(ap, 0); | |
898 | ||
7b70fc03 TH |
899 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
900 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
901 | ||
dbd82616 | 902 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
903 | qc->flags |= ATA_QCFLAG_FAILED; |
904 | ata_qc_complete(qc); | |
905 | nr_aborted++; | |
906 | } | |
907 | } | |
908 | ||
909 | if (!nr_aborted) | |
910 | ata_port_schedule_eh(ap); | |
911 | ||
912 | return nr_aborted; | |
913 | } | |
914 | ||
dbd82616 TH |
915 | /** |
916 | * ata_link_abort - abort all qc's on the link | |
917 | * @link: ATA link to abort qc's for | |
918 | * | |
919 | * Abort all active qc's active on @link and schedule EH. | |
920 | * | |
921 | * LOCKING: | |
922 | * spin_lock_irqsave(host lock) | |
923 | * | |
924 | * RETURNS: | |
925 | * Number of aborted qc's. | |
926 | */ | |
927 | int ata_link_abort(struct ata_link *link) | |
928 | { | |
929 | return ata_do_link_abort(link->ap, link); | |
930 | } | |
931 | ||
932 | /** | |
933 | * ata_port_abort - abort all qc's on the port | |
934 | * @ap: ATA port to abort qc's for | |
935 | * | |
936 | * Abort all active qc's of @ap and schedule EH. | |
937 | * | |
938 | * LOCKING: | |
939 | * spin_lock_irqsave(host_set lock) | |
940 | * | |
941 | * RETURNS: | |
942 | * Number of aborted qc's. | |
943 | */ | |
944 | int ata_port_abort(struct ata_port *ap) | |
945 | { | |
946 | return ata_do_link_abort(ap, NULL); | |
947 | } | |
948 | ||
e3180499 TH |
949 | /** |
950 | * __ata_port_freeze - freeze port | |
951 | * @ap: ATA port to freeze | |
952 | * | |
953 | * This function is called when HSM violation or some other | |
954 | * condition disrupts normal operation of the port. Frozen port | |
955 | * is not allowed to perform any operation until the port is | |
956 | * thawed, which usually follows a successful reset. | |
957 | * | |
958 | * ap->ops->freeze() callback can be used for freezing the port | |
959 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
960 | * port cannot be frozen hardware-wise, the interrupt handler | |
961 | * must ack and clear interrupts unconditionally while the port | |
962 | * is frozen. | |
963 | * | |
964 | * LOCKING: | |
cca3974e | 965 | * spin_lock_irqsave(host lock) |
e3180499 TH |
966 | */ |
967 | static void __ata_port_freeze(struct ata_port *ap) | |
968 | { | |
969 | WARN_ON(!ap->ops->error_handler); | |
970 | ||
971 | if (ap->ops->freeze) | |
972 | ap->ops->freeze(ap); | |
973 | ||
b51e9e5d | 974 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 975 | |
44877b4e | 976 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
977 | } |
978 | ||
979 | /** | |
980 | * ata_port_freeze - abort & freeze port | |
981 | * @ap: ATA port to freeze | |
982 | * | |
983 | * Abort and freeze @ap. | |
984 | * | |
985 | * LOCKING: | |
cca3974e | 986 | * spin_lock_irqsave(host lock) |
e3180499 TH |
987 | * |
988 | * RETURNS: | |
989 | * Number of aborted commands. | |
990 | */ | |
991 | int ata_port_freeze(struct ata_port *ap) | |
992 | { | |
993 | int nr_aborted; | |
994 | ||
995 | WARN_ON(!ap->ops->error_handler); | |
996 | ||
997 | nr_aborted = ata_port_abort(ap); | |
998 | __ata_port_freeze(ap); | |
999 | ||
1000 | return nr_aborted; | |
1001 | } | |
1002 | ||
7d77b247 TH |
1003 | /** |
1004 | * sata_async_notification - SATA async notification handler | |
1005 | * @ap: ATA port where async notification is received | |
1006 | * | |
1007 | * Handler to be called when async notification via SDB FIS is | |
1008 | * received. This function schedules EH if necessary. | |
1009 | * | |
1010 | * LOCKING: | |
1011 | * spin_lock_irqsave(host lock) | |
1012 | * | |
1013 | * RETURNS: | |
1014 | * 1 if EH is scheduled, 0 otherwise. | |
1015 | */ | |
1016 | int sata_async_notification(struct ata_port *ap) | |
1017 | { | |
1018 | u32 sntf; | |
1019 | int rc; | |
1020 | ||
1021 | if (!(ap->flags & ATA_FLAG_AN)) | |
1022 | return 0; | |
1023 | ||
1024 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
1025 | if (rc == 0) | |
1026 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1027 | ||
071f44b1 | 1028 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1029 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1030 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1031 | /* PMP is not attached. Check whether ATAPI |
1032 | * AN is configured. If so, notify media | |
1033 | * change. | |
1034 | */ | |
1035 | struct ata_device *dev = ap->link.device; | |
1036 | ||
1037 | if ((dev->class == ATA_DEV_ATAPI) && | |
1038 | (dev->flags & ATA_DFLAG_AN)) | |
1039 | ata_scsi_media_change_notify(dev); | |
1040 | return 0; | |
1041 | } else { | |
1042 | /* PMP is attached but SNTF is not available. | |
1043 | * ATAPI async media change notification is | |
1044 | * not used. The PMP must be reporting PHY | |
1045 | * status change, schedule EH. | |
1046 | */ | |
1047 | ata_port_schedule_eh(ap); | |
1048 | return 1; | |
1049 | } | |
1050 | } else { | |
1051 | /* PMP is attached and SNTF is available */ | |
1052 | struct ata_link *link; | |
1053 | ||
1054 | /* check and notify ATAPI AN */ | |
1eca4365 | 1055 | ata_for_each_link(link, ap, EDGE) { |
7d77b247 TH |
1056 | if (!(sntf & (1 << link->pmp))) |
1057 | continue; | |
1058 | ||
1059 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1060 | (link->device->flags & ATA_DFLAG_AN)) | |
1061 | ata_scsi_media_change_notify(link->device); | |
1062 | } | |
1063 | ||
1064 | /* If PMP is reporting that PHY status of some | |
1065 | * downstream ports has changed, schedule EH. | |
1066 | */ | |
1067 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1068 | ata_port_schedule_eh(ap); | |
1069 | return 1; | |
1070 | } | |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | } | |
1075 | ||
e3180499 TH |
1076 | /** |
1077 | * ata_eh_freeze_port - EH helper to freeze port | |
1078 | * @ap: ATA port to freeze | |
1079 | * | |
1080 | * Freeze @ap. | |
1081 | * | |
1082 | * LOCKING: | |
1083 | * None. | |
1084 | */ | |
1085 | void ata_eh_freeze_port(struct ata_port *ap) | |
1086 | { | |
1087 | unsigned long flags; | |
1088 | ||
1089 | if (!ap->ops->error_handler) | |
1090 | return; | |
1091 | ||
ba6a1308 | 1092 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1093 | __ata_port_freeze(ap); |
ba6a1308 | 1094 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1095 | } |
1096 | ||
1097 | /** | |
1098 | * ata_port_thaw_port - EH helper to thaw port | |
1099 | * @ap: ATA port to thaw | |
1100 | * | |
1101 | * Thaw frozen port @ap. | |
1102 | * | |
1103 | * LOCKING: | |
1104 | * None. | |
1105 | */ | |
1106 | void ata_eh_thaw_port(struct ata_port *ap) | |
1107 | { | |
1108 | unsigned long flags; | |
1109 | ||
1110 | if (!ap->ops->error_handler) | |
1111 | return; | |
1112 | ||
ba6a1308 | 1113 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1114 | |
b51e9e5d | 1115 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1116 | |
1117 | if (ap->ops->thaw) | |
1118 | ap->ops->thaw(ap); | |
1119 | ||
ba6a1308 | 1120 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1121 | |
44877b4e | 1122 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1123 | } |
1124 | ||
ece1d636 TH |
1125 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1126 | { | |
1127 | /* nada */ | |
1128 | } | |
1129 | ||
1130 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1131 | { | |
1132 | struct ata_port *ap = qc->ap; | |
1133 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1134 | unsigned long flags; | |
1135 | ||
ba6a1308 | 1136 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1137 | qc->scsidone = ata_eh_scsidone; |
1138 | __ata_qc_complete(qc); | |
1139 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1140 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1141 | |
1142 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1143 | } | |
1144 | ||
1145 | /** | |
1146 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1147 | * @qc: Command to complete | |
1148 | * | |
1149 | * Indicate to the mid and upper layers that an ATA command has | |
1150 | * completed. To be used from EH. | |
1151 | */ | |
1152 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1153 | { | |
1154 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1155 | scmd->retries = scmd->allowed; | |
1156 | __ata_eh_qc_complete(qc); | |
1157 | } | |
1158 | ||
1159 | /** | |
1160 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1161 | * @qc: Command to retry | |
1162 | * | |
1163 | * Indicate to the mid and upper layers that an ATA command | |
1164 | * should be retried. To be used from EH. | |
1165 | * | |
1166 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
1167 | * scmd->retries is decremented for commands which get retried | |
1168 | * due to unrelated failures (qc->err_mask is zero). | |
1169 | */ | |
1170 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1171 | { | |
1172 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1173 | if (!qc->err_mask && scmd->retries) | |
1174 | scmd->retries--; | |
1175 | __ata_eh_qc_complete(qc); | |
1176 | } | |
022bdb07 | 1177 | |
0ea035a3 TH |
1178 | /** |
1179 | * ata_eh_detach_dev - detach ATA device | |
1180 | * @dev: ATA device to detach | |
1181 | * | |
1182 | * Detach @dev. | |
1183 | * | |
1184 | * LOCKING: | |
1185 | * None. | |
1186 | */ | |
fb7fd614 | 1187 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1188 | { |
f58229f8 TH |
1189 | struct ata_link *link = dev->link; |
1190 | struct ata_port *ap = link->ap; | |
90484ebf | 1191 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1192 | unsigned long flags; |
1193 | ||
1194 | ata_dev_disable(dev); | |
1195 | ||
ba6a1308 | 1196 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1197 | |
1198 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1199 | ||
1200 | if (ata_scsi_offline_dev(dev)) { | |
1201 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1202 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1203 | } |
1204 | ||
90484ebf | 1205 | /* clear per-dev EH info */ |
f58229f8 TH |
1206 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1207 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1208 | ehc->saved_xfer_mode[dev->devno] = 0; |
1209 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1210 | |
ba6a1308 | 1211 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1212 | } |
1213 | ||
022bdb07 TH |
1214 | /** |
1215 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1216 | * @link: target ATA link |
47005f25 | 1217 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1218 | * @action: action about to be performed |
1219 | * | |
1220 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1221 | * in @link->eh_info such that eh actions are not unnecessarily |
1222 | * repeated. | |
022bdb07 TH |
1223 | * |
1224 | * LOCKING: | |
1225 | * None. | |
1226 | */ | |
fb7fd614 TH |
1227 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1228 | unsigned int action) | |
022bdb07 | 1229 | { |
955e57df TH |
1230 | struct ata_port *ap = link->ap; |
1231 | struct ata_eh_info *ehi = &link->eh_info; | |
1232 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1233 | unsigned long flags; |
1234 | ||
ba6a1308 | 1235 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1236 | |
955e57df | 1237 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1238 | |
a568d1d2 TH |
1239 | /* About to take EH action, set RECOVERED. Ignore actions on |
1240 | * slave links as master will do them again. | |
1241 | */ | |
1242 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1243 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1244 | ||
ba6a1308 | 1245 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1246 | } |
1247 | ||
47005f25 TH |
1248 | /** |
1249 | * ata_eh_done - EH action complete | |
955e57df | 1250 | * @ap: target ATA port |
47005f25 TH |
1251 | * @dev: target ATA dev for per-dev action (can be NULL) |
1252 | * @action: action just completed | |
1253 | * | |
1254 | * Called right after performing EH actions to clear related bits | |
955e57df | 1255 | * in @link->eh_context. |
47005f25 TH |
1256 | * |
1257 | * LOCKING: | |
1258 | * None. | |
1259 | */ | |
fb7fd614 TH |
1260 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1261 | unsigned int action) | |
47005f25 | 1262 | { |
955e57df | 1263 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1264 | |
955e57df | 1265 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1266 | } |
1267 | ||
022bdb07 TH |
1268 | /** |
1269 | * ata_err_string - convert err_mask to descriptive string | |
1270 | * @err_mask: error mask to convert to string | |
1271 | * | |
1272 | * Convert @err_mask to descriptive string. Errors are | |
1273 | * prioritized according to severity and only the most severe | |
1274 | * error is reported. | |
1275 | * | |
1276 | * LOCKING: | |
1277 | * None. | |
1278 | * | |
1279 | * RETURNS: | |
1280 | * Descriptive string for @err_mask | |
1281 | */ | |
2dcb407e | 1282 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1283 | { |
1284 | if (err_mask & AC_ERR_HOST_BUS) | |
1285 | return "host bus error"; | |
1286 | if (err_mask & AC_ERR_ATA_BUS) | |
1287 | return "ATA bus error"; | |
1288 | if (err_mask & AC_ERR_TIMEOUT) | |
1289 | return "timeout"; | |
1290 | if (err_mask & AC_ERR_HSM) | |
1291 | return "HSM violation"; | |
1292 | if (err_mask & AC_ERR_SYSTEM) | |
1293 | return "internal error"; | |
1294 | if (err_mask & AC_ERR_MEDIA) | |
1295 | return "media error"; | |
1296 | if (err_mask & AC_ERR_INVALID) | |
1297 | return "invalid argument"; | |
1298 | if (err_mask & AC_ERR_DEV) | |
1299 | return "device error"; | |
1300 | return "unknown error"; | |
1301 | } | |
1302 | ||
e8ee8451 TH |
1303 | /** |
1304 | * ata_read_log_page - read a specific log page | |
1305 | * @dev: target device | |
1306 | * @page: page to read | |
1307 | * @buf: buffer to store read page | |
1308 | * @sectors: number of sectors to read | |
1309 | * | |
1310 | * Read log page using READ_LOG_EXT command. | |
1311 | * | |
1312 | * LOCKING: | |
1313 | * Kernel thread context (may sleep). | |
1314 | * | |
1315 | * RETURNS: | |
1316 | * 0 on success, AC_ERR_* mask otherwise. | |
1317 | */ | |
1318 | static unsigned int ata_read_log_page(struct ata_device *dev, | |
1319 | u8 page, void *buf, unsigned int sectors) | |
1320 | { | |
1321 | struct ata_taskfile tf; | |
1322 | unsigned int err_mask; | |
1323 | ||
1324 | DPRINTK("read log page - page %d\n", page); | |
1325 | ||
1326 | ata_tf_init(dev, &tf); | |
1327 | tf.command = ATA_CMD_READ_LOG_EXT; | |
1328 | tf.lbal = page; | |
1329 | tf.nsect = sectors; | |
1330 | tf.hob_nsect = sectors >> 8; | |
1331 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
1332 | tf.protocol = ATA_PROT_PIO; | |
1333 | ||
1334 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1335 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 TH |
1336 | |
1337 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
1338 | return err_mask; | |
1339 | } | |
1340 | ||
1341 | /** | |
1342 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1343 | * @dev: Device to read log page 10h from | |
1344 | * @tag: Resulting tag of the failed command | |
1345 | * @tf: Resulting taskfile registers of the failed command | |
1346 | * | |
1347 | * Read log page 10h to obtain NCQ error details and clear error | |
1348 | * condition. | |
1349 | * | |
1350 | * LOCKING: | |
1351 | * Kernel thread context (may sleep). | |
1352 | * | |
1353 | * RETURNS: | |
1354 | * 0 on success, -errno otherwise. | |
1355 | */ | |
1356 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1357 | int *tag, struct ata_taskfile *tf) | |
1358 | { | |
9af5c9c9 | 1359 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1360 | unsigned int err_mask; |
1361 | u8 csum; | |
1362 | int i; | |
1363 | ||
1364 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); | |
1365 | if (err_mask) | |
1366 | return -EIO; | |
1367 | ||
1368 | csum = 0; | |
1369 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1370 | csum += buf[i]; | |
1371 | if (csum) | |
1372 | ata_dev_printk(dev, KERN_WARNING, | |
1373 | "invalid checksum 0x%x on log page 10h\n", csum); | |
1374 | ||
1375 | if (buf[0] & 0x80) | |
1376 | return -ENOENT; | |
1377 | ||
1378 | *tag = buf[0] & 0x1f; | |
1379 | ||
1380 | tf->command = buf[2]; | |
1381 | tf->feature = buf[3]; | |
1382 | tf->lbal = buf[4]; | |
1383 | tf->lbam = buf[5]; | |
1384 | tf->lbah = buf[6]; | |
1385 | tf->device = buf[7]; | |
1386 | tf->hob_lbal = buf[8]; | |
1387 | tf->hob_lbam = buf[9]; | |
1388 | tf->hob_lbah = buf[10]; | |
1389 | tf->nsect = buf[12]; | |
1390 | tf->hob_nsect = buf[13]; | |
1391 | ||
1392 | return 0; | |
1393 | } | |
1394 | ||
11fc33da TH |
1395 | /** |
1396 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1397 | * @dev: target ATAPI device | |
1398 | * @r_sense_key: out parameter for sense_key | |
1399 | * | |
1400 | * Perform ATAPI TEST_UNIT_READY. | |
1401 | * | |
1402 | * LOCKING: | |
1403 | * EH context (may sleep). | |
1404 | * | |
1405 | * RETURNS: | |
1406 | * 0 on success, AC_ERR_* mask on failure. | |
1407 | */ | |
1408 | static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) | |
1409 | { | |
1410 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1411 | struct ata_taskfile tf; | |
1412 | unsigned int err_mask; | |
1413 | ||
1414 | ata_tf_init(dev, &tf); | |
1415 | ||
1416 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1417 | tf.command = ATA_CMD_PACKET; | |
1418 | tf.protocol = ATAPI_PROT_NODATA; | |
1419 | ||
1420 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1421 | if (err_mask == AC_ERR_DEV) | |
1422 | *r_sense_key = tf.feature >> 4; | |
1423 | return err_mask; | |
1424 | } | |
1425 | ||
022bdb07 TH |
1426 | /** |
1427 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1428 | * @dev: device to perform REQUEST_SENSE to | |
1429 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1430 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1431 | * |
1432 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1433 | * SENSE. This function is EH helper. | |
1434 | * | |
1435 | * LOCKING: | |
1436 | * Kernel thread context (may sleep). | |
1437 | * | |
1438 | * RETURNS: | |
1439 | * 0 on success, AC_ERR_* mask on failure | |
1440 | */ | |
3eabddb8 TH |
1441 | static unsigned int atapi_eh_request_sense(struct ata_device *dev, |
1442 | u8 *sense_buf, u8 dfl_sense_key) | |
022bdb07 | 1443 | { |
3eabddb8 TH |
1444 | u8 cdb[ATAPI_CDB_LEN] = |
1445 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1446 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1447 | struct ata_taskfile tf; |
022bdb07 TH |
1448 | |
1449 | DPRINTK("ATAPI request sense\n"); | |
1450 | ||
022bdb07 TH |
1451 | /* FIXME: is this needed? */ |
1452 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
1453 | ||
56287768 AL |
1454 | /* initialize sense_buf with the error register, |
1455 | * for the case where they are -not- overwritten | |
1456 | */ | |
022bdb07 | 1457 | sense_buf[0] = 0x70; |
3eabddb8 | 1458 | sense_buf[2] = dfl_sense_key; |
56287768 | 1459 | |
a617c09f | 1460 | /* some devices time out if garbage left in tf */ |
56287768 | 1461 | ata_tf_init(dev, &tf); |
022bdb07 | 1462 | |
022bdb07 TH |
1463 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1464 | tf.command = ATA_CMD_PACKET; | |
1465 | ||
1466 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1467 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1468 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1469 | tf.feature |= ATAPI_PKT_DMA; |
1470 | } else { | |
0dc36888 | 1471 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1472 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1473 | tf.lbah = 0; | |
022bdb07 TH |
1474 | } |
1475 | ||
1476 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1477 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1478 | } |
1479 | ||
1480 | /** | |
1481 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1482 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1483 | * |
1484 | * Analyze SError if available and further determine cause of | |
1485 | * failure. | |
1486 | * | |
1487 | * LOCKING: | |
1488 | * None. | |
1489 | */ | |
0260731f | 1490 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1491 | { |
0260731f | 1492 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1493 | u32 serror = ehc->i.serror; |
1494 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1495 | u32 hotplug_mask; |
022bdb07 | 1496 | |
e0614db2 | 1497 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1498 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1499 | action |= ATA_EH_RESET; |
022bdb07 TH |
1500 | } |
1501 | if (serror & SERR_PROTOCOL) { | |
1502 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1503 | action |= ATA_EH_RESET; |
022bdb07 TH |
1504 | } |
1505 | if (serror & SERR_INTERNAL) { | |
1506 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1507 | action |= ATA_EH_RESET; |
022bdb07 | 1508 | } |
f9df58cb TH |
1509 | |
1510 | /* Determine whether a hotplug event has occurred. Both | |
1511 | * SError.N/X are considered hotplug events for enabled or | |
1512 | * host links. For disabled PMP links, only N bit is | |
1513 | * considered as X bit is left at 1 for link plugging. | |
1514 | */ | |
1515 | hotplug_mask = 0; | |
1516 | ||
1517 | if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
1518 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; | |
1519 | else | |
1520 | hotplug_mask = SERR_PHYRDY_CHG; | |
1521 | ||
1522 | if (serror & hotplug_mask) | |
084fe639 | 1523 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1524 | |
1525 | ehc->i.err_mask |= err_mask; | |
1526 | ehc->i.action |= action; | |
1527 | } | |
1528 | ||
e8ee8451 TH |
1529 | /** |
1530 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1531 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1532 | * |
1533 | * Read log page 10h, determine the offending qc and acquire | |
1534 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1535 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1536 | * care of the rest. | |
1537 | * | |
1538 | * LOCKING: | |
1539 | * Kernel thread context (may sleep). | |
1540 | */ | |
10acf3b0 | 1541 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1542 | { |
0260731f TH |
1543 | struct ata_port *ap = link->ap; |
1544 | struct ata_eh_context *ehc = &link->eh_context; | |
1545 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1546 | struct ata_queued_cmd *qc; |
1547 | struct ata_taskfile tf; | |
1548 | int tag, rc; | |
1549 | ||
1550 | /* if frozen, we can't do much */ | |
b51e9e5d | 1551 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1552 | return; |
1553 | ||
1554 | /* is it NCQ device error? */ | |
0260731f | 1555 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1556 | return; |
1557 | ||
1558 | /* has LLDD analyzed already? */ | |
1559 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1560 | qc = __ata_qc_from_tag(ap, tag); | |
1561 | ||
1562 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1563 | continue; | |
1564 | ||
1565 | if (qc->err_mask) | |
1566 | return; | |
1567 | } | |
1568 | ||
1569 | /* okay, this error is ours */ | |
1570 | rc = ata_eh_read_log_10h(dev, &tag, &tf); | |
1571 | if (rc) { | |
0260731f | 1572 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
e8ee8451 TH |
1573 | "(errno=%d)\n", rc); |
1574 | return; | |
1575 | } | |
1576 | ||
0260731f TH |
1577 | if (!(link->sactive & (1 << tag))) { |
1578 | ata_link_printk(link, KERN_ERR, "log page 10h reported " | |
e8ee8451 TH |
1579 | "inactive tag %d\n", tag); |
1580 | return; | |
1581 | } | |
1582 | ||
1583 | /* we've got the perpetrator, condemn it */ | |
1584 | qc = __ata_qc_from_tag(ap, tag); | |
1585 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1586 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1587 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
e8ee8451 TH |
1588 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1589 | } | |
1590 | ||
022bdb07 TH |
1591 | /** |
1592 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1593 | * @qc: qc to analyze | |
1594 | * @tf: Taskfile registers to analyze | |
1595 | * | |
1596 | * Analyze taskfile of @qc and further determine cause of | |
1597 | * failure. This function also requests ATAPI sense data if | |
1598 | * avaliable. | |
1599 | * | |
1600 | * LOCKING: | |
1601 | * Kernel thread context (may sleep). | |
1602 | * | |
1603 | * RETURNS: | |
1604 | * Determined recovery action | |
1605 | */ | |
1606 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1607 | const struct ata_taskfile *tf) | |
1608 | { | |
1609 | unsigned int tmp, action = 0; | |
1610 | u8 stat = tf->command, err = tf->feature; | |
1611 | ||
1612 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1613 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1614 | return ATA_EH_RESET; |
022bdb07 TH |
1615 | } |
1616 | ||
a51d644a TH |
1617 | if (stat & (ATA_ERR | ATA_DF)) |
1618 | qc->err_mask |= AC_ERR_DEV; | |
1619 | else | |
022bdb07 TH |
1620 | return 0; |
1621 | ||
1622 | switch (qc->dev->class) { | |
1623 | case ATA_DEV_ATA: | |
1624 | if (err & ATA_ICRC) | |
1625 | qc->err_mask |= AC_ERR_ATA_BUS; | |
1626 | if (err & ATA_UNC) | |
1627 | qc->err_mask |= AC_ERR_MEDIA; | |
1628 | if (err & ATA_IDNF) | |
1629 | qc->err_mask |= AC_ERR_INVALID; | |
1630 | break; | |
1631 | ||
1632 | case ATA_DEV_ATAPI: | |
a569a30d | 1633 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1634 | tmp = atapi_eh_request_sense(qc->dev, |
1635 | qc->scsicmd->sense_buffer, | |
1636 | qc->result_tf.feature >> 4); | |
a569a30d TH |
1637 | if (!tmp) { |
1638 | /* ATA_QCFLAG_SENSE_VALID is used to | |
1639 | * tell atapi_qc_complete() that sense | |
1640 | * data is already valid. | |
1641 | * | |
1642 | * TODO: interpret sense data and set | |
1643 | * appropriate err_mask. | |
1644 | */ | |
1645 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
1646 | } else | |
1647 | qc->err_mask |= tmp; | |
1648 | } | |
022bdb07 TH |
1649 | } |
1650 | ||
1651 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) | |
cf480626 | 1652 | action |= ATA_EH_RESET; |
022bdb07 TH |
1653 | |
1654 | return action; | |
1655 | } | |
1656 | ||
76326ac1 TH |
1657 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1658 | int *xfer_ok) | |
022bdb07 | 1659 | { |
76326ac1 TH |
1660 | int base = 0; |
1661 | ||
1662 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1663 | *xfer_ok = 1; | |
1664 | ||
1665 | if (!*xfer_ok) | |
75f9cafc | 1666 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1667 | |
7d47e8d4 | 1668 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1669 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1670 | |
7d47e8d4 | 1671 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1672 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1673 | |
3884f7b0 | 1674 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1675 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1676 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1677 | if ((err_mask & |
1678 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1679 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1680 | } |
1681 | ||
1682 | return 0; | |
1683 | } | |
1684 | ||
7d47e8d4 | 1685 | struct speed_down_verdict_arg { |
022bdb07 | 1686 | u64 since; |
76326ac1 | 1687 | int xfer_ok; |
3884f7b0 | 1688 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1689 | }; |
1690 | ||
7d47e8d4 | 1691 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1692 | { |
7d47e8d4 | 1693 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1694 | int cat; |
022bdb07 TH |
1695 | |
1696 | if (ent->timestamp < arg->since) | |
1697 | return -1; | |
1698 | ||
76326ac1 TH |
1699 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1700 | &arg->xfer_ok); | |
7d47e8d4 | 1701 | arg->nr_errors[cat]++; |
76326ac1 | 1702 | |
022bdb07 TH |
1703 | return 0; |
1704 | } | |
1705 | ||
1706 | /** | |
7d47e8d4 | 1707 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1708 | * @dev: Device of interest |
1709 | * | |
1710 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1711 | * whether NCQ needs to be turned off, transfer speed should be |
1712 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1713 | * |
3884f7b0 TH |
1714 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1715 | * | |
1716 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1717 | * IO commands | |
1718 | * | |
1719 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1720 | * | |
76326ac1 TH |
1721 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1722 | * data transfer hasn't been verified. | |
1723 | * | |
3884f7b0 TH |
1724 | * Verdicts are |
1725 | * | |
1726 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1727 | * |
3884f7b0 TH |
1728 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1729 | * to PIO. | |
7d47e8d4 | 1730 | * |
3884f7b0 | 1731 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1732 | * |
3884f7b0 | 1733 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1734 | * taken per error. An action triggered by non-DUBIOUS errors |
1735 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1736 | * This is to expedite speed down decisions right after device is | |
1737 | * initially configured. | |
1738 | * | |
1739 | * The followings are speed down rules. #1 and #2 deal with | |
1740 | * DUBIOUS errors. | |
7d47e8d4 | 1741 | * |
76326ac1 TH |
1742 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1743 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1744 | * | |
1745 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1746 | * occurred during last 5 mins, NCQ_OFF. | |
1747 | * | |
1748 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
3884f7b0 | 1749 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1750 | * |
76326ac1 | 1751 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1752 | * during last 10 mins, NCQ_OFF. |
1753 | * | |
76326ac1 | 1754 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1755 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1756 | * |
022bdb07 TH |
1757 | * LOCKING: |
1758 | * Inherited from caller. | |
1759 | * | |
1760 | * RETURNS: | |
7d47e8d4 | 1761 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1762 | */ |
7d47e8d4 | 1763 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1764 | { |
7d47e8d4 TH |
1765 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1766 | u64 j64 = get_jiffies_64(); | |
1767 | struct speed_down_verdict_arg arg; | |
1768 | unsigned int verdict = 0; | |
022bdb07 | 1769 | |
3884f7b0 | 1770 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1771 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1772 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1773 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1774 | |
76326ac1 TH |
1775 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1776 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1777 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1778 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1779 | ||
1780 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1781 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1782 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1783 | ||
3884f7b0 TH |
1784 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1785 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1786 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1787 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1788 | |
3884f7b0 | 1789 | /* scan past 10 mins of error history */ |
022bdb07 | 1790 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1791 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1792 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1793 | |
3884f7b0 TH |
1794 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1795 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1796 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1797 | ||
1798 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1799 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1800 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1801 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1802 | |
7d47e8d4 | 1803 | return verdict; |
022bdb07 TH |
1804 | } |
1805 | ||
1806 | /** | |
1807 | * ata_eh_speed_down - record error and speed down if necessary | |
1808 | * @dev: Failed device | |
3884f7b0 | 1809 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1810 | * @err_mask: err_mask of the error |
1811 | * | |
1812 | * Record error and examine error history to determine whether | |
1813 | * adjusting transmission speed is necessary. It also sets | |
1814 | * transmission limits appropriately if such adjustment is | |
1815 | * necessary. | |
1816 | * | |
1817 | * LOCKING: | |
1818 | * Kernel thread context (may sleep). | |
1819 | * | |
1820 | * RETURNS: | |
7d47e8d4 | 1821 | * Determined recovery action. |
022bdb07 | 1822 | */ |
3884f7b0 TH |
1823 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1824 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1825 | { |
b1c72916 | 1826 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 1827 | int xfer_ok = 0; |
7d47e8d4 TH |
1828 | unsigned int verdict; |
1829 | unsigned int action = 0; | |
1830 | ||
1831 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1832 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1833 | return 0; |
1834 | ||
1835 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1836 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1837 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1838 | |
7d47e8d4 TH |
1839 | /* turn off NCQ? */ |
1840 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1841 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1842 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1843 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
1844 | ata_dev_printk(dev, KERN_WARNING, | |
1845 | "NCQ disabled due to excessive errors\n"); | |
1846 | goto done; | |
1847 | } | |
022bdb07 | 1848 | |
7d47e8d4 TH |
1849 | /* speed down? */ |
1850 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1851 | /* speed down SATA link speed if possible */ | |
3884f7b0 | 1852 | if (sata_down_spd_limit(link) == 0) { |
cf480626 | 1853 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1854 | goto done; |
1855 | } | |
022bdb07 | 1856 | |
7d47e8d4 TH |
1857 | /* lower transfer mode */ |
1858 | if (dev->spdn_cnt < 2) { | |
1859 | static const int dma_dnxfer_sel[] = | |
1860 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1861 | static const int pio_dnxfer_sel[] = | |
1862 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1863 | int sel; | |
1864 | ||
1865 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1866 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1867 | else | |
1868 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1869 | ||
1870 | dev->spdn_cnt++; | |
1871 | ||
1872 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1873 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1874 | goto done; |
1875 | } | |
1876 | } | |
1877 | } | |
1878 | ||
1879 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1880 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1881 | */ |
1882 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1883 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1884 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1885 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1886 | dev->spdn_cnt = 0; | |
cf480626 | 1887 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1888 | goto done; |
1889 | } | |
1890 | } | |
022bdb07 | 1891 | |
022bdb07 | 1892 | return 0; |
7d47e8d4 TH |
1893 | done: |
1894 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1895 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1896 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1897 | return action; |
022bdb07 TH |
1898 | } |
1899 | ||
1900 | /** | |
9b1e2658 TH |
1901 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1902 | * @link: host link to perform autopsy on | |
022bdb07 | 1903 | * |
0260731f TH |
1904 | * Analyze why @link failed and determine which recovery actions |
1905 | * are needed. This function also sets more detailed AC_ERR_* | |
1906 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1907 | * |
1908 | * LOCKING: | |
1909 | * Kernel thread context (may sleep). | |
1910 | */ | |
9b1e2658 | 1911 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1912 | { |
0260731f | 1913 | struct ata_port *ap = link->ap; |
936fd732 | 1914 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 1915 | struct ata_device *dev; |
3884f7b0 TH |
1916 | unsigned int all_err_mask = 0, eflags = 0; |
1917 | int tag; | |
022bdb07 TH |
1918 | u32 serror; |
1919 | int rc; | |
1920 | ||
1921 | DPRINTK("ENTER\n"); | |
1922 | ||
1cdaf534 TH |
1923 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1924 | return; | |
1925 | ||
022bdb07 | 1926 | /* obtain and analyze SError */ |
936fd732 | 1927 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1928 | if (rc == 0) { |
1929 | ehc->i.serror |= serror; | |
0260731f | 1930 | ata_eh_analyze_serror(link); |
4e57c517 | 1931 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 1932 | /* SError read failed, force reset and probing */ |
b558eddd | 1933 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 1934 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
1935 | ehc->i.err_mask |= AC_ERR_OTHER; |
1936 | } | |
022bdb07 | 1937 | |
e8ee8451 | 1938 | /* analyze NCQ failure */ |
0260731f | 1939 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 1940 | |
022bdb07 TH |
1941 | /* any real error trumps AC_ERR_OTHER */ |
1942 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
1943 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
1944 | ||
1945 | all_err_mask |= ehc->i.err_mask; | |
1946 | ||
1947 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1948 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1949 | ||
b1c72916 TH |
1950 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
1951 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
1952 | continue; |
1953 | ||
1954 | /* inherit upper level err_mask */ | |
1955 | qc->err_mask |= ehc->i.err_mask; | |
1956 | ||
022bdb07 | 1957 | /* analyze TF */ |
4528e4da | 1958 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
1959 | |
1960 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
1961 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
1962 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
1963 | AC_ERR_INVALID); | |
1964 | ||
1965 | /* any real error trumps unknown error */ | |
1966 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1967 | qc->err_mask &= ~AC_ERR_OTHER; | |
1968 | ||
1969 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 1970 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 1971 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 | 1972 | |
03faab78 TH |
1973 | /* determine whether the command is worth retrying */ |
1974 | if (!(qc->err_mask & AC_ERR_INVALID) && | |
1975 | ((qc->flags & ATA_QCFLAG_IO) || qc->err_mask != AC_ERR_DEV)) | |
1976 | qc->flags |= ATA_QCFLAG_RETRY; | |
1977 | ||
022bdb07 | 1978 | /* accumulate error info */ |
4528e4da | 1979 | ehc->i.dev = qc->dev; |
022bdb07 TH |
1980 | all_err_mask |= qc->err_mask; |
1981 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 1982 | eflags |= ATA_EFLAG_IS_IO; |
022bdb07 TH |
1983 | } |
1984 | ||
a20f33ff | 1985 | /* enforce default EH actions */ |
b51e9e5d | 1986 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 1987 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 1988 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
1989 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
1990 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 1991 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 1992 | |
dfcc173d TH |
1993 | /* If we have offending qcs and the associated failed device, |
1994 | * perform per-dev EH action only on the offending device. | |
1995 | */ | |
4528e4da | 1996 | if (ehc->i.dev) { |
4528e4da TH |
1997 | ehc->i.dev_action[ehc->i.dev->devno] |= |
1998 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
1999 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2000 | } |
2001 | ||
2695e366 TH |
2002 | /* propagate timeout to host link */ |
2003 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2004 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2005 | ||
2006 | /* record error and consider speeding down */ | |
dfcc173d | 2007 | dev = ehc->i.dev; |
2695e366 TH |
2008 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2009 | ata_dev_enabled(link->device)))) | |
2010 | dev = link->device; | |
dfcc173d | 2011 | |
76326ac1 TH |
2012 | if (dev) { |
2013 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2014 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2015 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 2016 | } |
dfcc173d | 2017 | |
022bdb07 TH |
2018 | DPRINTK("EXIT\n"); |
2019 | } | |
2020 | ||
2021 | /** | |
9b1e2658 TH |
2022 | * ata_eh_autopsy - analyze error and determine recovery action |
2023 | * @ap: host port to perform autopsy on | |
2024 | * | |
2025 | * Analyze all links of @ap and determine why they failed and | |
2026 | * which recovery actions are needed. | |
2027 | * | |
2028 | * LOCKING: | |
2029 | * Kernel thread context (may sleep). | |
2030 | */ | |
fb7fd614 | 2031 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2032 | { |
2033 | struct ata_link *link; | |
2034 | ||
1eca4365 | 2035 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2036 | ata_eh_link_autopsy(link); |
2695e366 | 2037 | |
b1c72916 TH |
2038 | /* Handle the frigging slave link. Autopsy is done similarly |
2039 | * but actions and flags are transferred over to the master | |
2040 | * link and handled from there. | |
2041 | */ | |
2042 | if (ap->slave_link) { | |
2043 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2044 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2045 | ||
848e4c68 TH |
2046 | /* transfer control flags from master to slave */ |
2047 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2048 | ||
2049 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2050 | ata_eh_link_autopsy(ap->slave_link); |
2051 | ||
848e4c68 | 2052 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2053 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2054 | mehc->i.action |= sehc->i.action; | |
2055 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2056 | mehc->i.flags |= sehc->i.flags; | |
2057 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2058 | } | |
2059 | ||
2695e366 TH |
2060 | /* Autopsy of fanout ports can affect host link autopsy. |
2061 | * Perform host link autopsy last. | |
2062 | */ | |
071f44b1 | 2063 | if (sata_pmp_attached(ap)) |
2695e366 | 2064 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2065 | } |
2066 | ||
2067 | /** | |
2068 | * ata_eh_link_report - report error handling to user | |
0260731f | 2069 | * @link: ATA link EH is going on |
022bdb07 TH |
2070 | * |
2071 | * Report EH to user. | |
2072 | * | |
2073 | * LOCKING: | |
2074 | * None. | |
2075 | */ | |
9b1e2658 | 2076 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2077 | { |
0260731f TH |
2078 | struct ata_port *ap = link->ap; |
2079 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2080 | const char *frozen, *desc; |
a1e10f7e | 2081 | char tries_buf[6]; |
022bdb07 TH |
2082 | int tag, nr_failed = 0; |
2083 | ||
94ff3d54 TH |
2084 | if (ehc->i.flags & ATA_EHI_QUIET) |
2085 | return; | |
2086 | ||
022bdb07 TH |
2087 | desc = NULL; |
2088 | if (ehc->i.desc[0] != '\0') | |
2089 | desc = ehc->i.desc; | |
2090 | ||
2091 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2092 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2093 | ||
b1c72916 TH |
2094 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2095 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2096 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2097 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2098 | continue; |
2099 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2100 | continue; | |
2101 | ||
2102 | nr_failed++; | |
2103 | } | |
2104 | ||
2105 | if (!nr_failed && !ehc->i.err_mask) | |
2106 | return; | |
2107 | ||
2108 | frozen = ""; | |
b51e9e5d | 2109 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2110 | frozen = " frozen"; |
2111 | ||
a1e10f7e TH |
2112 | memset(tries_buf, 0, sizeof(tries_buf)); |
2113 | if (ap->eh_tries < ATA_EH_MAX_TRIES) | |
2114 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", | |
2115 | ap->eh_tries); | |
2116 | ||
022bdb07 | 2117 | if (ehc->i.dev) { |
e8ee8451 | 2118 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2119 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2120 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2121 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2122 | if (desc) |
b64bbc39 | 2123 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
022bdb07 | 2124 | } else { |
0260731f | 2125 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2126 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2127 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2128 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2129 | if (desc) |
0260731f | 2130 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
022bdb07 TH |
2131 | } |
2132 | ||
1333e194 | 2133 | if (ehc->i.serror) |
da0e21d3 | 2134 | ata_link_printk(link, KERN_ERR, |
1333e194 RH |
2135 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2136 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2137 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2138 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2139 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2140 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2141 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2142 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2143 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2144 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2145 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2146 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2147 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2148 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2149 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2150 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2151 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2152 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
1333e194 | 2153 | |
022bdb07 TH |
2154 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
2155 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 2156 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2157 | const u8 *cdb = qc->cdb; |
2158 | char data_buf[20] = ""; | |
2159 | char cdb_buf[70] = ""; | |
022bdb07 | 2160 | |
0260731f | 2161 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2162 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2163 | continue; |
2164 | ||
abb6a889 TH |
2165 | if (qc->dma_dir != DMA_NONE) { |
2166 | static const char *dma_str[] = { | |
2167 | [DMA_BIDIRECTIONAL] = "bidi", | |
2168 | [DMA_TO_DEVICE] = "out", | |
2169 | [DMA_FROM_DEVICE] = "in", | |
2170 | }; | |
2171 | static const char *prot_str[] = { | |
2172 | [ATA_PROT_PIO] = "pio", | |
2173 | [ATA_PROT_DMA] = "dma", | |
2174 | [ATA_PROT_NCQ] = "ncq", | |
0dc36888 TH |
2175 | [ATAPI_PROT_PIO] = "pio", |
2176 | [ATAPI_PROT_DMA] = "dma", | |
abb6a889 TH |
2177 | }; |
2178 | ||
2179 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", | |
2180 | prot_str[qc->tf.protocol], qc->nbytes, | |
2181 | dma_str[qc->dma_dir]); | |
2182 | } | |
2183 | ||
e39eec13 | 2184 | if (ata_is_atapi(qc->tf.protocol)) |
abb6a889 TH |
2185 | snprintf(cdb_buf, sizeof(cdb_buf), |
2186 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " | |
2187 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", | |
2188 | cdb[0], cdb[1], cdb[2], cdb[3], | |
2189 | cdb[4], cdb[5], cdb[6], cdb[7], | |
2190 | cdb[8], cdb[9], cdb[10], cdb[11], | |
2191 | cdb[12], cdb[13], cdb[14], cdb[15]); | |
2192 | ||
8a937581 TH |
2193 | ata_dev_printk(qc->dev, KERN_ERR, |
2194 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " | |
abb6a889 | 2195 | "tag %d%s\n %s" |
8a937581 | 2196 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2197 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2198 | cmd->command, cmd->feature, cmd->nsect, |
2199 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2200 | cmd->hob_feature, cmd->hob_nsect, | |
2201 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2202 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2203 | res->command, res->feature, res->nsect, |
2204 | res->lbal, res->lbam, res->lbah, | |
2205 | res->hob_feature, res->hob_nsect, | |
2206 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2207 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2208 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 RH |
2209 | |
2210 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | | |
2dcb407e | 2211 | ATA_ERR)) { |
1333e194 RH |
2212 | if (res->command & ATA_BUSY) |
2213 | ata_dev_printk(qc->dev, KERN_ERR, | |
2dcb407e | 2214 | "status: { Busy }\n"); |
1333e194 RH |
2215 | else |
2216 | ata_dev_printk(qc->dev, KERN_ERR, | |
2217 | "status: { %s%s%s%s}\n", | |
2218 | res->command & ATA_DRDY ? "DRDY " : "", | |
2219 | res->command & ATA_DF ? "DF " : "", | |
2220 | res->command & ATA_DRQ ? "DRQ " : "", | |
2dcb407e | 2221 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2222 | } |
2223 | ||
2224 | if (cmd->command != ATA_CMD_PACKET && | |
2225 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | | |
2226 | ATA_ABORTED))) | |
2227 | ata_dev_printk(qc->dev, KERN_ERR, | |
2228 | "error: { %s%s%s%s}\n", | |
2229 | res->feature & ATA_ICRC ? "ICRC " : "", | |
2230 | res->feature & ATA_UNC ? "UNC " : "", | |
2231 | res->feature & ATA_IDNF ? "IDNF " : "", | |
2dcb407e | 2232 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
022bdb07 TH |
2233 | } |
2234 | } | |
2235 | ||
9b1e2658 TH |
2236 | /** |
2237 | * ata_eh_report - report error handling to user | |
2238 | * @ap: ATA port to report EH about | |
2239 | * | |
2240 | * Report EH to user. | |
2241 | * | |
2242 | * LOCKING: | |
2243 | * None. | |
2244 | */ | |
fb7fd614 | 2245 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2246 | { |
2247 | struct ata_link *link; | |
2248 | ||
1eca4365 | 2249 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2250 | ata_eh_link_report(link); |
2251 | } | |
2252 | ||
cc0680a5 | 2253 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2254 | unsigned int *classes, unsigned long deadline, |
2255 | bool clear_classes) | |
d87fa38e | 2256 | { |
f58229f8 | 2257 | struct ata_device *dev; |
d87fa38e | 2258 | |
b1c72916 | 2259 | if (clear_classes) |
1eca4365 | 2260 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2261 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2262 | |
f046519f | 2263 | return reset(link, classes, deadline); |
d87fa38e TH |
2264 | } |
2265 | ||
ae791c05 | 2266 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
5dbfc9cb | 2267 | int rc, const unsigned int *classes) |
664faf09 | 2268 | { |
45db2f6c | 2269 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2270 | return 0; |
5dbfc9cb TH |
2271 | if (rc == -EAGAIN) |
2272 | return 1; | |
071f44b1 | 2273 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2274 | return 1; |
664faf09 TH |
2275 | return 0; |
2276 | } | |
2277 | ||
fb7fd614 TH |
2278 | int ata_eh_reset(struct ata_link *link, int classify, |
2279 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2280 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2281 | { |
afaa5c37 | 2282 | struct ata_port *ap = link->ap; |
b1c72916 | 2283 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2284 | struct ata_eh_context *ehc = &link->eh_context; |
b1c72916 | 2285 | struct ata_eh_context *sehc = &slave->eh_context; |
664faf09 | 2286 | unsigned int *classes = ehc->classes; |
416dc9ed | 2287 | unsigned int lflags = link->flags; |
1cdaf534 | 2288 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2289 | int max_tries = 0, try = 0; |
b1c72916 | 2290 | struct ata_link *failed_link; |
f58229f8 | 2291 | struct ata_device *dev; |
416dc9ed | 2292 | unsigned long deadline, now; |
022bdb07 | 2293 | ata_reset_fn_t reset; |
afaa5c37 | 2294 | unsigned long flags; |
416dc9ed | 2295 | u32 sstatus; |
b1c72916 | 2296 | int nr_unknown, rc; |
022bdb07 | 2297 | |
932648b0 TH |
2298 | /* |
2299 | * Prepare to reset | |
2300 | */ | |
d8af0eb6 TH |
2301 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2302 | max_tries++; | |
05944bdf TH |
2303 | if (link->flags & ATA_LFLAG_NO_HRST) |
2304 | hardreset = NULL; | |
2305 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2306 | softreset = NULL; | |
d8af0eb6 | 2307 | |
19b72321 TH |
2308 | /* make sure each reset attemp is at least COOL_DOWN apart */ |
2309 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
2310 | now = jiffies; | |
2311 | WARN_ON(time_after(ehc->last_reset, now)); | |
2312 | deadline = ata_deadline(ehc->last_reset, | |
2313 | ATA_EH_RESET_COOL_DOWN); | |
2314 | if (time_before(now, deadline)) | |
2315 | schedule_timeout_uninterruptible(deadline - now); | |
2316 | } | |
0a2c0f56 | 2317 | |
afaa5c37 TH |
2318 | spin_lock_irqsave(ap->lock, flags); |
2319 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2320 | spin_unlock_irqrestore(ap->lock, flags); | |
2321 | ||
cf480626 | 2322 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2323 | |
1eca4365 | 2324 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2325 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2326 | * may change configuration and be in PIO0 timing. If | |
2327 | * we do a hard reset (or are coming from power on) | |
2328 | * this is true for ATA or ATAPI. Until we've set a | |
2329 | * suitable controller mode we should not touch the | |
2330 | * bus as we may be talking too fast. | |
2331 | */ | |
2332 | dev->pio_mode = XFER_PIO_0; | |
2333 | ||
2334 | /* If the controller has a pio mode setup function | |
2335 | * then use it to set the chipset to rights. Don't | |
2336 | * touch the DMA setup as that will be dealt with when | |
2337 | * configuring devices. | |
2338 | */ | |
2339 | if (ap->ops->set_piomode) | |
2340 | ap->ops->set_piomode(ap, dev); | |
2341 | } | |
2342 | ||
cf480626 | 2343 | /* prefer hardreset */ |
932648b0 | 2344 | reset = NULL; |
cf480626 TH |
2345 | ehc->i.action &= ~ATA_EH_RESET; |
2346 | if (hardreset) { | |
2347 | reset = hardreset; | |
a674050e | 2348 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2349 | } else if (softreset) { |
cf480626 | 2350 | reset = softreset; |
a674050e | 2351 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2352 | } |
f5914a46 TH |
2353 | |
2354 | if (prereset) { | |
b1c72916 TH |
2355 | unsigned long deadline = ata_deadline(jiffies, |
2356 | ATA_EH_PRERESET_TIMEOUT); | |
2357 | ||
2358 | if (slave) { | |
2359 | sehc->i.action &= ~ATA_EH_RESET; | |
2360 | sehc->i.action |= ehc->i.action; | |
2361 | } | |
2362 | ||
2363 | rc = prereset(link, deadline); | |
2364 | ||
2365 | /* If present, do prereset on slave link too. Reset | |
2366 | * is skipped iff both master and slave links report | |
2367 | * -ENOENT or clear ATA_EH_RESET. | |
2368 | */ | |
2369 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2370 | int tmp; | |
2371 | ||
2372 | tmp = prereset(slave, deadline); | |
2373 | if (tmp != -ENOENT) | |
2374 | rc = tmp; | |
2375 | ||
2376 | ehc->i.action |= sehc->i.action; | |
2377 | } | |
2378 | ||
f5914a46 | 2379 | if (rc) { |
c961922b | 2380 | if (rc == -ENOENT) { |
cc0680a5 | 2381 | ata_link_printk(link, KERN_DEBUG, |
4aa9ab67 | 2382 | "port disabled. ignoring.\n"); |
cf480626 | 2383 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2384 | |
1eca4365 | 2385 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2386 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2387 | |
2388 | rc = 0; | |
c961922b | 2389 | } else |
cc0680a5 | 2390 | ata_link_printk(link, KERN_ERR, |
f5914a46 | 2391 | "prereset failed (errno=%d)\n", rc); |
fccb6ea5 | 2392 | goto out; |
f5914a46 | 2393 | } |
f5914a46 | 2394 | |
932648b0 TH |
2395 | /* prereset() might have cleared ATA_EH_RESET. If so, |
2396 | * bang classes and return. | |
2397 | */ | |
2398 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2399 | ata_for_each_dev(dev, link, ALL) |
932648b0 TH |
2400 | classes[dev->devno] = ATA_DEV_NONE; |
2401 | rc = 0; | |
2402 | goto out; | |
2403 | } | |
f5914a46 TH |
2404 | } |
2405 | ||
022bdb07 | 2406 | retry: |
932648b0 TH |
2407 | /* |
2408 | * Perform reset | |
2409 | */ | |
dc98c32c TH |
2410 | if (ata_is_host_link(link)) |
2411 | ata_eh_freeze_port(ap); | |
2412 | ||
341c2c95 | 2413 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2414 | |
932648b0 TH |
2415 | if (reset) { |
2416 | if (verbose) | |
2417 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", | |
2418 | reset == softreset ? "soft" : "hard"); | |
2419 | ||
2420 | /* mark that this EH session started with reset */ | |
19b72321 | 2421 | ehc->last_reset = jiffies; |
932648b0 TH |
2422 | if (reset == hardreset) |
2423 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2424 | else | |
2425 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2426 | |
b1c72916 TH |
2427 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2428 | if (rc && rc != -EAGAIN) { | |
2429 | failed_link = link; | |
5dbfc9cb | 2430 | goto fail; |
b1c72916 TH |
2431 | } |
2432 | ||
2433 | /* hardreset slave link if existent */ | |
2434 | if (slave && reset == hardreset) { | |
2435 | int tmp; | |
2436 | ||
2437 | if (verbose) | |
2438 | ata_link_printk(slave, KERN_INFO, | |
2439 | "hard resetting link\n"); | |
2440 | ||
2441 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2442 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2443 | false); | |
2444 | switch (tmp) { | |
2445 | case -EAGAIN: | |
2446 | rc = -EAGAIN; | |
2447 | case 0: | |
2448 | break; | |
2449 | default: | |
2450 | failed_link = slave; | |
2451 | rc = tmp; | |
2452 | goto fail; | |
2453 | } | |
2454 | } | |
022bdb07 | 2455 | |
b1c72916 | 2456 | /* perform follow-up SRST if necessary */ |
932648b0 | 2457 | if (reset == hardreset && |
5dbfc9cb | 2458 | ata_eh_followup_srst_needed(link, rc, classes)) { |
932648b0 | 2459 | reset = softreset; |
022bdb07 | 2460 | |
932648b0 TH |
2461 | if (!reset) { |
2462 | ata_link_printk(link, KERN_ERR, | |
2463 | "follow-up softreset required " | |
2464 | "but no softreset avaliable\n"); | |
b1c72916 | 2465 | failed_link = link; |
932648b0 TH |
2466 | rc = -EINVAL; |
2467 | goto fail; | |
2468 | } | |
664faf09 | 2469 | |
932648b0 | 2470 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2471 | rc = ata_do_reset(link, reset, classes, deadline, true); |
664faf09 | 2472 | } |
932648b0 TH |
2473 | } else { |
2474 | if (verbose) | |
2475 | ata_link_printk(link, KERN_INFO, "no reset method " | |
2476 | "available, skipping reset\n"); | |
2477 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) | |
2478 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2479 | } |
2480 | ||
932648b0 TH |
2481 | /* |
2482 | * Post-reset processing | |
2483 | */ | |
1eca4365 | 2484 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2485 | /* After the reset, the device state is PIO 0 and the |
2486 | * controller state is undefined. Reset also wakes up | |
2487 | * drives from sleeping mode. | |
2488 | */ | |
2489 | dev->pio_mode = XFER_PIO_0; | |
2490 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2491 | |
816ab897 TH |
2492 | if (!ata_phys_link_offline(ata_dev_phys_link(dev))) { |
2493 | /* apply class override */ | |
2494 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2495 | classes[dev->devno] = ATA_DEV_ATA; | |
2496 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2497 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
2498 | } else | |
2499 | classes[dev->devno] = ATA_DEV_NONE; | |
022bdb07 TH |
2500 | } |
2501 | ||
416dc9ed TH |
2502 | /* record current link speed */ |
2503 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2504 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2505 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2506 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2507 | |
dc98c32c TH |
2508 | /* thaw the port */ |
2509 | if (ata_is_host_link(link)) | |
2510 | ata_eh_thaw_port(ap); | |
2511 | ||
f046519f TH |
2512 | /* postreset() should clear hardware SError. Although SError |
2513 | * is cleared during link resume, clearing SError here is | |
2514 | * necessary as some PHYs raise hotplug events after SRST. | |
2515 | * This introduces race condition where hotplug occurs between | |
2516 | * reset and here. This race is mediated by cross checking | |
2517 | * link onlineness and classification result later. | |
2518 | */ | |
b1c72916 | 2519 | if (postreset) { |
416dc9ed | 2520 | postreset(link, classes); |
b1c72916 TH |
2521 | if (slave) |
2522 | postreset(slave, classes); | |
2523 | } | |
20952b69 | 2524 | |
f046519f TH |
2525 | /* clear cached SError */ |
2526 | spin_lock_irqsave(link->ap->lock, flags); | |
2527 | link->eh_info.serror = 0; | |
b1c72916 TH |
2528 | if (slave) |
2529 | slave->eh_info.serror = 0; | |
f046519f TH |
2530 | spin_unlock_irqrestore(link->ap->lock, flags); |
2531 | ||
2532 | /* Make sure onlineness and classification result correspond. | |
2533 | * Hotplug could have happened during reset and some | |
2534 | * controllers fail to wait while a drive is spinning up after | |
2535 | * being hotplugged causing misdetection. By cross checking | |
2536 | * link onlineness and classification result, those conditions | |
2537 | * can be reliably detected and retried. | |
2538 | */ | |
b1c72916 | 2539 | nr_unknown = 0; |
1eca4365 | 2540 | ata_for_each_dev(dev, link, ALL) { |
f046519f | 2541 | /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */ |
b1c72916 | 2542 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { |
f046519f | 2543 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 TH |
2544 | if (ata_phys_link_online(ata_dev_phys_link(dev))) |
2545 | nr_unknown++; | |
2546 | } | |
f046519f TH |
2547 | } |
2548 | ||
b1c72916 | 2549 | if (classify && nr_unknown) { |
f046519f TH |
2550 | if (try < max_tries) { |
2551 | ata_link_printk(link, KERN_WARNING, "link online but " | |
2552 | "device misclassified, retrying\n"); | |
b1c72916 | 2553 | failed_link = link; |
f046519f TH |
2554 | rc = -EAGAIN; |
2555 | goto fail; | |
2556 | } | |
2557 | ata_link_printk(link, KERN_WARNING, | |
2558 | "link online but device misclassified, " | |
2559 | "device detection might fail\n"); | |
2560 | } | |
2561 | ||
416dc9ed | 2562 | /* reset successful, schedule revalidation */ |
cf480626 | 2563 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2564 | if (slave) |
2565 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
19b72321 | 2566 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2567 | ehc->i.action |= ATA_EH_REVALIDATE; |
ae791c05 | 2568 | |
416dc9ed | 2569 | rc = 0; |
fccb6ea5 TH |
2570 | out: |
2571 | /* clear hotplug flag */ | |
2572 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2573 | if (slave) |
2574 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2575 | |
2576 | spin_lock_irqsave(ap->lock, flags); | |
2577 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2578 | spin_unlock_irqrestore(ap->lock, flags); | |
2579 | ||
022bdb07 | 2580 | return rc; |
416dc9ed TH |
2581 | |
2582 | fail: | |
5958e302 TH |
2583 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2584 | if (!ata_is_host_link(link) && | |
2585 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2586 | rc = -ERESTART; | |
2587 | ||
416dc9ed TH |
2588 | if (rc == -ERESTART || try >= max_tries) |
2589 | goto out; | |
2590 | ||
2591 | now = jiffies; | |
2592 | if (time_before(now, deadline)) { | |
2593 | unsigned long delta = deadline - now; | |
2594 | ||
b1c72916 | 2595 | ata_link_printk(failed_link, KERN_WARNING, |
0a2c0f56 TH |
2596 | "reset failed (errno=%d), retrying in %u secs\n", |
2597 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed TH |
2598 | |
2599 | while (delta) | |
2600 | delta = schedule_timeout_uninterruptible(delta); | |
2601 | } | |
2602 | ||
b1c72916 | 2603 | if (try == max_tries - 1) { |
416dc9ed | 2604 | sata_down_spd_limit(link); |
b1c72916 TH |
2605 | if (slave) |
2606 | sata_down_spd_limit(slave); | |
2607 | } else if (rc == -EPIPE) | |
2608 | sata_down_spd_limit(failed_link); | |
2609 | ||
416dc9ed TH |
2610 | if (hardreset) |
2611 | reset = hardreset; | |
2612 | goto retry; | |
022bdb07 TH |
2613 | } |
2614 | ||
45fabbb7 EO |
2615 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
2616 | { | |
2617 | struct ata_link *link; | |
2618 | struct ata_device *dev; | |
2619 | unsigned long flags; | |
2620 | ||
2621 | /* | |
2622 | * This function can be thought of as an extended version of | |
2623 | * ata_eh_about_to_do() specially crafted to accommodate the | |
2624 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
2625 | * does not leave the do {} while () loop in ata_eh_recover as | |
2626 | * long as the timeout for a park request to *one* device on | |
2627 | * the port has not expired, and since we still want to pick | |
2628 | * up park requests to other devices on the same port or | |
2629 | * timeout updates for the same device, we have to pull | |
2630 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
2631 | * ourselves at the beginning of each pass over the loop. | |
2632 | * | |
2633 | * Additionally, all write accesses to &ap->park_req_pending | |
2634 | * through INIT_COMPLETION() (see below) or complete_all() | |
2635 | * (see ata_scsi_park_store()) are protected by the host lock. | |
2636 | * As a result we have that park_req_pending.done is zero on | |
2637 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
2638 | * *all* devices on port ap have been pulled into the | |
2639 | * respective eh_context structs. If, and only if, | |
2640 | * park_req_pending.done is non-zero by the time we reach | |
2641 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
2642 | * has been scheduled for at least one of the devices on port | |
2643 | * ap and we have to cycle over the do {} while () loop in | |
2644 | * ata_eh_recover() again. | |
2645 | */ | |
2646 | ||
2647 | spin_lock_irqsave(ap->lock, flags); | |
2648 | INIT_COMPLETION(ap->park_req_pending); | |
1eca4365 TH |
2649 | ata_for_each_link(link, ap, EDGE) { |
2650 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
2651 | struct ata_eh_info *ehi = &link->eh_info; |
2652 | ||
2653 | link->eh_context.i.dev_action[dev->devno] |= | |
2654 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
2655 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
2656 | } | |
2657 | } | |
2658 | spin_unlock_irqrestore(ap->lock, flags); | |
2659 | } | |
2660 | ||
2661 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
2662 | { | |
2663 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2664 | struct ata_taskfile tf; | |
2665 | unsigned int err_mask; | |
2666 | ||
2667 | ata_tf_init(dev, &tf); | |
2668 | if (park) { | |
2669 | ehc->unloaded_mask |= 1 << dev->devno; | |
2670 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
2671 | tf.feature = 0x44; | |
2672 | tf.lbal = 0x4c; | |
2673 | tf.lbam = 0x4e; | |
2674 | tf.lbah = 0x55; | |
2675 | } else { | |
2676 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2677 | tf.command = ATA_CMD_CHK_POWER; | |
2678 | } | |
2679 | ||
2680 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
2681 | tf.protocol |= ATA_PROT_NODATA; | |
2682 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
2683 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
2684 | ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); | |
2685 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2686 | } | |
2687 | } | |
2688 | ||
0260731f | 2689 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2690 | struct ata_device **r_failed_dev) |
022bdb07 | 2691 | { |
0260731f TH |
2692 | struct ata_port *ap = link->ap; |
2693 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2694 | struct ata_device *dev; |
8c3c52a8 | 2695 | unsigned int new_mask = 0; |
084fe639 | 2696 | unsigned long flags; |
f58229f8 | 2697 | int rc = 0; |
022bdb07 TH |
2698 | |
2699 | DPRINTK("ENTER\n"); | |
2700 | ||
8c3c52a8 TH |
2701 | /* For PATA drive side cable detection to work, IDENTIFY must |
2702 | * be done backwards such that PDIAG- is released by the slave | |
2703 | * device before the master device is identified. | |
2704 | */ | |
1eca4365 | 2705 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
2706 | unsigned int action = ata_eh_dev_action(dev); |
2707 | unsigned int readid_flags = 0; | |
022bdb07 | 2708 | |
bff04647 TH |
2709 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2710 | readid_flags |= ATA_READID_POSTRESET; | |
2711 | ||
9666f400 | 2712 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2713 | WARN_ON(dev->class == ATA_DEV_PMP); |
2714 | ||
b1c72916 | 2715 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 2716 | rc = -EIO; |
8c3c52a8 | 2717 | goto err; |
022bdb07 TH |
2718 | } |
2719 | ||
0260731f | 2720 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2721 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2722 | readid_flags); | |
022bdb07 | 2723 | if (rc) |
8c3c52a8 | 2724 | goto err; |
022bdb07 | 2725 | |
0260731f | 2726 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2727 | |
baa1e78a TH |
2728 | /* Configuration may have changed, reconfigure |
2729 | * transfer mode. | |
2730 | */ | |
2731 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2732 | ||
3057ac3c | 2733 | /* schedule the scsi_rescan_device() here */ |
2734 | queue_work(ata_aux_wq, &(ap->scsi_rescan_task)); | |
084fe639 TH |
2735 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2736 | ehc->tries[dev->devno] && | |
2737 | ata_class_enabled(ehc->classes[dev->devno])) { | |
2738 | dev->class = ehc->classes[dev->devno]; | |
2739 | ||
633273a3 TH |
2740 | if (dev->class == ATA_DEV_PMP) |
2741 | rc = sata_pmp_attach(dev); | |
2742 | else | |
2743 | rc = ata_dev_read_id(dev, &dev->class, | |
2744 | readid_flags, dev->id); | |
8c3c52a8 TH |
2745 | switch (rc) { |
2746 | case 0: | |
f58229f8 | 2747 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2748 | break; |
2749 | case -ENOENT: | |
55a8e2c8 TH |
2750 | /* IDENTIFY was issued to non-existent |
2751 | * device. No need to reset. Just | |
2752 | * thaw and kill the device. | |
2753 | */ | |
2754 | ata_eh_thaw_port(ap); | |
084fe639 TH |
2755 | dev->class = ATA_DEV_UNKNOWN; |
2756 | break; | |
8c3c52a8 TH |
2757 | default: |
2758 | dev->class = ATA_DEV_UNKNOWN; | |
2759 | goto err; | |
084fe639 | 2760 | } |
8c3c52a8 TH |
2761 | } |
2762 | } | |
084fe639 | 2763 | |
c1c4e8d5 | 2764 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
2765 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
2766 | if (ap->ops->cable_detect) | |
2767 | ap->cbl = ap->ops->cable_detect(ap); | |
2768 | ata_force_cbl(ap); | |
2769 | } | |
c1c4e8d5 | 2770 | |
8c3c52a8 TH |
2771 | /* Configure new devices forward such that user doesn't see |
2772 | * device detection messages backwards. | |
2773 | */ | |
1eca4365 | 2774 | ata_for_each_dev(dev, link, ALL) { |
633273a3 TH |
2775 | if (!(new_mask & (1 << dev->devno)) || |
2776 | dev->class == ATA_DEV_PMP) | |
8c3c52a8 TH |
2777 | continue; |
2778 | ||
2779 | ehc->i.flags |= ATA_EHI_PRINTINFO; | |
2780 | rc = ata_dev_configure(dev); | |
2781 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
2782 | if (rc) | |
2783 | goto err; | |
2784 | ||
2785 | spin_lock_irqsave(ap->lock, flags); | |
2786 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
2787 | spin_unlock_irqrestore(ap->lock, flags); | |
2788 | ||
2789 | /* new device discovered, configure xfermode */ | |
2790 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
2791 | } |
2792 | ||
8c3c52a8 | 2793 | return 0; |
022bdb07 | 2794 | |
8c3c52a8 TH |
2795 | err: |
2796 | *r_failed_dev = dev; | |
2797 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
2798 | return rc; |
2799 | } | |
2800 | ||
6f1d1e3a TH |
2801 | /** |
2802 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2803 | * @link: link on which timings will be programmed | |
2804 | * @r_failed_dev: out paramter for failed device | |
2805 | * | |
2806 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2807 | * ata_set_mode() fails, pointer to the failing device is | |
2808 | * returned in @r_failed_dev. | |
2809 | * | |
2810 | * LOCKING: | |
2811 | * PCI/etc. bus probe sem. | |
2812 | * | |
2813 | * RETURNS: | |
2814 | * 0 on success, negative errno otherwise | |
2815 | */ | |
2816 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
2817 | { | |
2818 | struct ata_port *ap = link->ap; | |
00115e0f TH |
2819 | struct ata_device *dev; |
2820 | int rc; | |
6f1d1e3a | 2821 | |
76326ac1 | 2822 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 2823 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
2824 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
2825 | struct ata_ering_entry *ent; | |
2826 | ||
2827 | ent = ata_ering_top(&dev->ering); | |
2828 | if (ent) | |
2829 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
2830 | } | |
2831 | } | |
2832 | ||
6f1d1e3a TH |
2833 | /* has private set_mode? */ |
2834 | if (ap->ops->set_mode) | |
00115e0f TH |
2835 | rc = ap->ops->set_mode(link, r_failed_dev); |
2836 | else | |
2837 | rc = ata_do_set_mode(link, r_failed_dev); | |
2838 | ||
2839 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 2840 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
2841 | struct ata_eh_context *ehc = &link->eh_context; |
2842 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
2843 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
2844 | ||
2845 | if (dev->xfer_mode != saved_xfer_mode || | |
2846 | ata_ncq_enabled(dev) != saved_ncq) | |
2847 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
2848 | } | |
2849 | ||
2850 | return rc; | |
6f1d1e3a TH |
2851 | } |
2852 | ||
11fc33da TH |
2853 | /** |
2854 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
2855 | * @dev: ATAPI device to clear UA for | |
2856 | * | |
2857 | * Resets and other operations can make an ATAPI device raise | |
2858 | * UNIT ATTENTION which causes the next operation to fail. This | |
2859 | * function clears UA. | |
2860 | * | |
2861 | * LOCKING: | |
2862 | * EH context (may sleep). | |
2863 | * | |
2864 | * RETURNS: | |
2865 | * 0 on success, -errno on failure. | |
2866 | */ | |
2867 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
2868 | { | |
2869 | int i; | |
2870 | ||
2871 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
2872 | u8 sense_buffer[SCSI_SENSE_BUFFERSIZE]; | |
2873 | u8 sense_key = 0; | |
2874 | unsigned int err_mask; | |
2875 | ||
2876 | err_mask = atapi_eh_tur(dev, &sense_key); | |
2877 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
2878 | ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " | |
2879 | "failed (err_mask=0x%x)\n", err_mask); | |
2880 | return -EIO; | |
2881 | } | |
2882 | ||
2883 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
2884 | return 0; | |
2885 | ||
2886 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
2887 | if (err_mask) { | |
2888 | ata_dev_printk(dev, KERN_WARNING, "failed to clear " | |
2889 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); | |
2890 | return -EIO; | |
2891 | } | |
2892 | } | |
2893 | ||
2894 | ata_dev_printk(dev, KERN_WARNING, | |
2895 | "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); | |
2896 | ||
2897 | return 0; | |
2898 | } | |
2899 | ||
0260731f | 2900 | static int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 2901 | { |
f58229f8 TH |
2902 | struct ata_device *dev; |
2903 | int cnt = 0; | |
022bdb07 | 2904 | |
1eca4365 TH |
2905 | ata_for_each_dev(dev, link, ENABLED) |
2906 | cnt++; | |
022bdb07 TH |
2907 | return cnt; |
2908 | } | |
2909 | ||
0260731f | 2910 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 2911 | { |
f58229f8 TH |
2912 | struct ata_device *dev; |
2913 | int cnt = 0; | |
084fe639 | 2914 | |
1eca4365 | 2915 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2916 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
2917 | cnt++; |
2918 | return cnt; | |
2919 | } | |
2920 | ||
0260731f | 2921 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 2922 | { |
672b2d65 | 2923 | struct ata_port *ap = link->ap; |
0260731f | 2924 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 2925 | struct ata_device *dev; |
084fe639 | 2926 | |
f9df58cb TH |
2927 | /* skip disabled links */ |
2928 | if (link->flags & ATA_LFLAG_DISABLED) | |
2929 | return 1; | |
2930 | ||
672b2d65 TH |
2931 | /* thaw frozen port and recover failed devices */ |
2932 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
2933 | return 0; | |
2934 | ||
2935 | /* reset at least once if reset is requested */ | |
2936 | if ((ehc->i.action & ATA_EH_RESET) && | |
2937 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
2938 | return 0; |
2939 | ||
2940 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 2941 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
2942 | if (dev->class == ATA_DEV_UNKNOWN && |
2943 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
2944 | return 0; | |
2945 | } | |
2946 | ||
2947 | return 1; | |
2948 | } | |
2949 | ||
02c05a27 TH |
2950 | static int ata_eh_schedule_probe(struct ata_device *dev) |
2951 | { | |
2952 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2953 | ||
2954 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
2955 | (ehc->did_probe_mask & (1 << dev->devno))) | |
2956 | return 0; | |
2957 | ||
2958 | ata_eh_detach_dev(dev); | |
2959 | ata_dev_init(dev); | |
2960 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 2961 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
2962 | ehc->saved_xfer_mode[dev->devno] = 0; |
2963 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 TH |
2964 | |
2965 | return 1; | |
2966 | } | |
2967 | ||
9b1e2658 | 2968 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 2969 | { |
9af5c9c9 | 2970 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 TH |
2971 | |
2972 | ehc->tries[dev->devno]--; | |
2973 | ||
2974 | switch (err) { | |
2975 | case -ENODEV: | |
2976 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
2977 | ehc->i.probe_mask |= (1 << dev->devno); | |
2978 | case -EINVAL: | |
2979 | /* give it just one more chance */ | |
2980 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
2981 | case -EIO: | |
4fb4615b | 2982 | if (ehc->tries[dev->devno] == 1 && dev->pio_mode > XFER_PIO_0) { |
fee7ca72 TH |
2983 | /* This is the last chance, better to slow |
2984 | * down than lose it. | |
2985 | */ | |
b1c72916 | 2986 | sata_down_spd_limit(ata_dev_phys_link(dev)); |
fee7ca72 TH |
2987 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2988 | } | |
2989 | } | |
2990 | ||
2991 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
2992 | /* disable device if it has used up all its chances */ | |
2993 | ata_dev_disable(dev); | |
2994 | ||
2995 | /* detach if offline */ | |
b1c72916 | 2996 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
2997 | ata_eh_detach_dev(dev); |
2998 | ||
02c05a27 | 2999 | /* schedule probe if necessary */ |
87fbc5a0 | 3000 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3001 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3002 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3003 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3004 | } | |
9b1e2658 TH |
3005 | |
3006 | return 1; | |
fee7ca72 | 3007 | } else { |
cf480626 | 3008 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3009 | return 0; |
fee7ca72 TH |
3010 | } |
3011 | } | |
3012 | ||
022bdb07 TH |
3013 | /** |
3014 | * ata_eh_recover - recover host port after error | |
3015 | * @ap: host port to recover | |
f5914a46 | 3016 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3017 | * @softreset: softreset method (can be NULL) |
3018 | * @hardreset: hardreset method (can be NULL) | |
3019 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3020 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3021 | * |
3022 | * This is the alpha and omega, eum and yang, heart and soul of | |
3023 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3024 | * recover each link and hotplug requests are recorded in the |
3025 | * link's eh_context. This function executes all the operations | |
3026 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3027 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3028 | * |
3029 | * LOCKING: | |
3030 | * Kernel thread context (may sleep). | |
3031 | * | |
3032 | * RETURNS: | |
3033 | * 0 on success, -errno on failure. | |
3034 | */ | |
fb7fd614 TH |
3035 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3036 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3037 | ata_postreset_fn_t postreset, | |
3038 | struct ata_link **r_failed_link) | |
022bdb07 | 3039 | { |
9b1e2658 | 3040 | struct ata_link *link; |
022bdb07 | 3041 | struct ata_device *dev; |
0a2c0f56 | 3042 | int nr_failed_devs; |
dc98c32c | 3043 | int rc; |
45fabbb7 | 3044 | unsigned long flags, deadline; |
022bdb07 TH |
3045 | |
3046 | DPRINTK("ENTER\n"); | |
3047 | ||
3048 | /* prep for recovery */ | |
1eca4365 | 3049 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3050 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3051 | |
f9df58cb TH |
3052 | /* re-enable link? */ |
3053 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3054 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3055 | spin_lock_irqsave(ap->lock, flags); | |
3056 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3057 | spin_unlock_irqrestore(ap->lock, flags); | |
3058 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3059 | } | |
3060 | ||
1eca4365 | 3061 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3062 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3063 | ehc->tries[dev->devno] = 1; | |
3064 | else | |
3065 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3066 | |
9b1e2658 TH |
3067 | /* collect port action mask recorded in dev actions */ |
3068 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3069 | ~ATA_EH_PERDEV_MASK; | |
3070 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3071 | ||
3072 | /* process hotplug request */ | |
3073 | if (dev->flags & ATA_DFLAG_DETACH) | |
3074 | ata_eh_detach_dev(dev); | |
3075 | ||
02c05a27 TH |
3076 | /* schedule probe if necessary */ |
3077 | if (!ata_dev_enabled(dev)) | |
3078 | ata_eh_schedule_probe(dev); | |
084fe639 | 3079 | } |
022bdb07 TH |
3080 | } |
3081 | ||
3082 | retry: | |
022bdb07 | 3083 | rc = 0; |
9b1e2658 | 3084 | nr_failed_devs = 0; |
022bdb07 | 3085 | |
aeb2ecd6 | 3086 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3087 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3088 | goto out; |
3089 | ||
9b1e2658 | 3090 | /* prep for EH */ |
1eca4365 | 3091 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3092 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3093 | |
9b1e2658 TH |
3094 | /* skip EH if possible. */ |
3095 | if (ata_eh_skip_recovery(link)) | |
3096 | ehc->i.action = 0; | |
3097 | ||
1eca4365 | 3098 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3099 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3100 | } | |
084fe639 | 3101 | |
022bdb07 | 3102 | /* reset */ |
1eca4365 | 3103 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3104 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3105 | |
dc98c32c TH |
3106 | if (!(ehc->i.action & ATA_EH_RESET)) |
3107 | continue; | |
9b1e2658 | 3108 | |
dc98c32c TH |
3109 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3110 | prereset, softreset, hardreset, postreset); | |
3111 | if (rc) { | |
3112 | ata_link_printk(link, KERN_ERR, | |
3113 | "reset failed, giving up\n"); | |
3114 | goto out; | |
022bdb07 | 3115 | } |
022bdb07 TH |
3116 | } |
3117 | ||
45fabbb7 EO |
3118 | do { |
3119 | unsigned long now; | |
3120 | ||
3121 | /* | |
3122 | * clears ATA_EH_PARK in eh_info and resets | |
3123 | * ap->park_req_pending | |
3124 | */ | |
3125 | ata_eh_pull_park_action(ap); | |
3126 | ||
3127 | deadline = jiffies; | |
1eca4365 TH |
3128 | ata_for_each_link(link, ap, EDGE) { |
3129 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3130 | struct ata_eh_context *ehc = &link->eh_context; |
3131 | unsigned long tmp; | |
3132 | ||
3133 | if (dev->class != ATA_DEV_ATA) | |
3134 | continue; | |
3135 | if (!(ehc->i.dev_action[dev->devno] & | |
3136 | ATA_EH_PARK)) | |
3137 | continue; | |
3138 | tmp = dev->unpark_deadline; | |
3139 | if (time_before(deadline, tmp)) | |
3140 | deadline = tmp; | |
3141 | else if (time_before_eq(tmp, jiffies)) | |
3142 | continue; | |
3143 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3144 | continue; | |
3145 | ||
3146 | ata_eh_park_issue_cmd(dev, 1); | |
3147 | } | |
3148 | } | |
3149 | ||
3150 | now = jiffies; | |
3151 | if (time_before_eq(deadline, now)) | |
3152 | break; | |
3153 | ||
3154 | deadline = wait_for_completion_timeout(&ap->park_req_pending, | |
3155 | deadline - now); | |
3156 | } while (deadline); | |
1eca4365 TH |
3157 | ata_for_each_link(link, ap, EDGE) { |
3158 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3159 | if (!(link->eh_context.unloaded_mask & |
3160 | (1 << dev->devno))) | |
3161 | continue; | |
3162 | ||
3163 | ata_eh_park_issue_cmd(dev, 0); | |
3164 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3165 | } | |
3166 | } | |
3167 | ||
9b1e2658 | 3168 | /* the rest */ |
1eca4365 | 3169 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3170 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3171 | |
9b1e2658 TH |
3172 | /* revalidate existing devices and attach new ones */ |
3173 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3174 | if (rc) |
022bdb07 | 3175 | goto dev_fail; |
022bdb07 | 3176 | |
633273a3 TH |
3177 | /* if PMP got attached, return, pmp EH will take care of it */ |
3178 | if (link->device->class == ATA_DEV_PMP) { | |
3179 | ehc->i.action = 0; | |
3180 | return 0; | |
3181 | } | |
3182 | ||
9b1e2658 TH |
3183 | /* configure transfer mode if necessary */ |
3184 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3185 | rc = ata_set_mode(link, &dev); | |
3186 | if (rc) | |
3187 | goto dev_fail; | |
3188 | ehc->i.flags &= ~ATA_EHI_SETMODE; | |
3189 | } | |
3190 | ||
11fc33da TH |
3191 | /* If reset has been issued, clear UA to avoid |
3192 | * disrupting the current users of the device. | |
3193 | */ | |
3194 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3195 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3196 | if (dev->class != ATA_DEV_ATAPI) |
3197 | continue; | |
3198 | rc = atapi_eh_clear_ua(dev); | |
3199 | if (rc) | |
3200 | goto dev_fail; | |
3201 | } | |
3202 | } | |
3203 | ||
3204 | /* configure link power saving */ | |
3ec25ebd | 3205 | if (ehc->i.action & ATA_EH_LPM) |
1eca4365 | 3206 | ata_for_each_dev(dev, link, ALL) |
ca77329f KCA |
3207 | ata_dev_enable_pm(dev, ap->pm_policy); |
3208 | ||
9b1e2658 TH |
3209 | /* this link is okay now */ |
3210 | ehc->i.flags = 0; | |
3211 | continue; | |
022bdb07 | 3212 | |
2dcb407e | 3213 | dev_fail: |
9b1e2658 | 3214 | nr_failed_devs++; |
0a2c0f56 | 3215 | ata_eh_handle_dev_fail(dev, rc); |
022bdb07 | 3216 | |
b06ce3e5 TH |
3217 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3218 | /* PMP reset requires working host port. | |
3219 | * Can't retry if it's frozen. | |
3220 | */ | |
071f44b1 | 3221 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3222 | goto out; |
9b1e2658 | 3223 | break; |
b06ce3e5 | 3224 | } |
022bdb07 TH |
3225 | } |
3226 | ||
0a2c0f56 | 3227 | if (nr_failed_devs) |
9b1e2658 | 3228 | goto retry; |
022bdb07 | 3229 | |
9b1e2658 TH |
3230 | out: |
3231 | if (rc && r_failed_link) | |
3232 | *r_failed_link = link; | |
3233 | ||
022bdb07 TH |
3234 | DPRINTK("EXIT, rc=%d\n", rc); |
3235 | return rc; | |
3236 | } | |
3237 | ||
3238 | /** | |
3239 | * ata_eh_finish - finish up EH | |
3240 | * @ap: host port to finish EH for | |
3241 | * | |
3242 | * Recovery is complete. Clean up EH states and retry or finish | |
3243 | * failed qcs. | |
3244 | * | |
3245 | * LOCKING: | |
3246 | * None. | |
3247 | */ | |
fb7fd614 | 3248 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
3249 | { |
3250 | int tag; | |
3251 | ||
3252 | /* retry or finish qcs */ | |
3253 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
3254 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
3255 | ||
3256 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
3257 | continue; | |
3258 | ||
3259 | if (qc->err_mask) { | |
3260 | /* FIXME: Once EH migration is complete, | |
3261 | * generate sense data in this function, | |
3262 | * considering both err_mask and tf. | |
3263 | */ | |
03faab78 | 3264 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3265 | ata_eh_qc_retry(qc); |
03faab78 TH |
3266 | else |
3267 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3268 | } else { |
3269 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3270 | ata_eh_qc_complete(qc); | |
3271 | } else { | |
3272 | /* feed zero TF to sense generation */ | |
3273 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3274 | ata_eh_qc_retry(qc); | |
3275 | } | |
3276 | } | |
3277 | } | |
da917d69 TH |
3278 | |
3279 | /* make sure nr_active_links is zero after EH */ | |
3280 | WARN_ON(ap->nr_active_links); | |
3281 | ap->nr_active_links = 0; | |
022bdb07 TH |
3282 | } |
3283 | ||
3284 | /** | |
3285 | * ata_do_eh - do standard error handling | |
3286 | * @ap: host port to handle error for | |
a1efdaba | 3287 | * |
f5914a46 | 3288 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3289 | * @softreset: softreset method (can be NULL) |
3290 | * @hardreset: hardreset method (can be NULL) | |
3291 | * @postreset: postreset method (can be NULL) | |
3292 | * | |
3293 | * Perform standard error handling sequence. | |
3294 | * | |
3295 | * LOCKING: | |
3296 | * Kernel thread context (may sleep). | |
3297 | */ | |
f5914a46 TH |
3298 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3299 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3300 | ata_postreset_fn_t postreset) | |
022bdb07 | 3301 | { |
9b1e2658 TH |
3302 | struct ata_device *dev; |
3303 | int rc; | |
3304 | ||
3305 | ata_eh_autopsy(ap); | |
3306 | ata_eh_report(ap); | |
3307 | ||
3308 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3309 | NULL); | |
3310 | if (rc) { | |
1eca4365 | 3311 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
3312 | ata_dev_disable(dev); |
3313 | } | |
3314 | ||
022bdb07 TH |
3315 | ata_eh_finish(ap); |
3316 | } | |
500530f6 | 3317 | |
a1efdaba TH |
3318 | /** |
3319 | * ata_std_error_handler - standard error handler | |
3320 | * @ap: host port to handle error for | |
3321 | * | |
3322 | * Standard error handler | |
3323 | * | |
3324 | * LOCKING: | |
3325 | * Kernel thread context (may sleep). | |
3326 | */ | |
3327 | void ata_std_error_handler(struct ata_port *ap) | |
3328 | { | |
3329 | struct ata_port_operations *ops = ap->ops; | |
3330 | ata_reset_fn_t hardreset = ops->hardreset; | |
3331 | ||
57c9efdf TH |
3332 | /* ignore built-in hardreset if SCR access is not available */ |
3333 | if (ata_is_builtin_hardreset(hardreset) && !sata_scr_valid(&ap->link)) | |
a1efdaba TH |
3334 | hardreset = NULL; |
3335 | ||
3336 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
3337 | } | |
3338 | ||
6ffa01d8 | 3339 | #ifdef CONFIG_PM |
500530f6 TH |
3340 | /** |
3341 | * ata_eh_handle_port_suspend - perform port suspend operation | |
3342 | * @ap: port to suspend | |
3343 | * | |
3344 | * Suspend @ap. | |
3345 | * | |
3346 | * LOCKING: | |
3347 | * Kernel thread context (may sleep). | |
3348 | */ | |
3349 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
3350 | { | |
3351 | unsigned long flags; | |
3352 | int rc = 0; | |
3353 | ||
3354 | /* are we suspending? */ | |
3355 | spin_lock_irqsave(ap->lock, flags); | |
3356 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3357 | ap->pm_mesg.event == PM_EVENT_ON) { | |
3358 | spin_unlock_irqrestore(ap->lock, flags); | |
3359 | return; | |
3360 | } | |
3361 | spin_unlock_irqrestore(ap->lock, flags); | |
3362 | ||
3363 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
3364 | ||
64578a3d TH |
3365 | /* tell ACPI we're suspending */ |
3366 | rc = ata_acpi_on_suspend(ap); | |
3367 | if (rc) | |
3368 | goto out; | |
3369 | ||
500530f6 TH |
3370 | /* suspend */ |
3371 | ata_eh_freeze_port(ap); | |
3372 | ||
3373 | if (ap->ops->port_suspend) | |
3374 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
3375 | ||
bd3adca5 | 3376 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
64578a3d | 3377 | out: |
500530f6 TH |
3378 | /* report result */ |
3379 | spin_lock_irqsave(ap->lock, flags); | |
3380 | ||
3381 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
3382 | if (rc == 0) | |
3383 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 3384 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
3385 | ata_port_schedule_eh(ap); |
3386 | ||
3387 | if (ap->pm_result) { | |
3388 | *ap->pm_result = rc; | |
3389 | ap->pm_result = NULL; | |
3390 | } | |
3391 | ||
3392 | spin_unlock_irqrestore(ap->lock, flags); | |
3393 | ||
3394 | return; | |
3395 | } | |
3396 | ||
3397 | /** | |
3398 | * ata_eh_handle_port_resume - perform port resume operation | |
3399 | * @ap: port to resume | |
3400 | * | |
3401 | * Resume @ap. | |
3402 | * | |
500530f6 TH |
3403 | * LOCKING: |
3404 | * Kernel thread context (may sleep). | |
3405 | */ | |
3406 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
3407 | { | |
500530f6 | 3408 | unsigned long flags; |
9666f400 | 3409 | int rc = 0; |
500530f6 TH |
3410 | |
3411 | /* are we resuming? */ | |
3412 | spin_lock_irqsave(ap->lock, flags); | |
3413 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3414 | ap->pm_mesg.event != PM_EVENT_ON) { | |
3415 | spin_unlock_irqrestore(ap->lock, flags); | |
3416 | return; | |
3417 | } | |
3418 | spin_unlock_irqrestore(ap->lock, flags); | |
3419 | ||
9666f400 | 3420 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 3421 | |
bd3adca5 SL |
3422 | ata_acpi_set_state(ap, PMSG_ON); |
3423 | ||
500530f6 TH |
3424 | if (ap->ops->port_resume) |
3425 | rc = ap->ops->port_resume(ap); | |
3426 | ||
6746544c TH |
3427 | /* tell ACPI that we're resuming */ |
3428 | ata_acpi_on_resume(ap); | |
3429 | ||
9666f400 | 3430 | /* report result */ |
500530f6 TH |
3431 | spin_lock_irqsave(ap->lock, flags); |
3432 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
3433 | if (ap->pm_result) { | |
3434 | *ap->pm_result = rc; | |
3435 | ap->pm_result = NULL; | |
3436 | } | |
3437 | spin_unlock_irqrestore(ap->lock, flags); | |
3438 | } | |
6ffa01d8 | 3439 | #endif /* CONFIG_PM */ |