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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> | |
6521148c | 43 | #include <scsi/scsi_dbg.h> |
c6fd2807 | 44 | #include "../scsi/scsi_transport_api.h" |
ece1d636 TH |
45 | |
46 | #include <linux/libata.h> | |
47 | ||
48 | #include "libata.h" | |
49 | ||
7d47e8d4 | 50 | enum { |
3884f7b0 | 51 | /* speed down verdicts */ |
7d47e8d4 TH |
52 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
53 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
54 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 55 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
56 | |
57 | /* error flags */ | |
58 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 59 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
3884f7b0 TH |
60 | |
61 | /* error categories */ | |
62 | ATA_ECAT_NONE = 0, | |
63 | ATA_ECAT_ATA_BUS = 1, | |
64 | ATA_ECAT_TOUT_HSM = 2, | |
65 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
66 | ATA_ECAT_DUBIOUS_NONE = 4, |
67 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
68 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
69 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
70 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 71 | |
87fbc5a0 TH |
72 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
73 | ||
0a2c0f56 TH |
74 | /* always put at least this amount of time between resets */ |
75 | ATA_EH_RESET_COOL_DOWN = 5000, | |
76 | ||
341c2c95 TH |
77 | /* Waiting in ->prereset can never be reliable. It's |
78 | * sometimes nice to wait there but it can't be depended upon; | |
79 | * otherwise, we wouldn't be resetting. Just give it enough | |
80 | * time for most drives to spin up. | |
81 | */ | |
82 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
83 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
84 | |
85 | ATA_EH_UA_TRIES = 5, | |
c2c7a89c TH |
86 | |
87 | /* probe speed down parameters, see ata_eh_schedule_probe() */ | |
88 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ | |
89 | ATA_EH_PROBE_TRIALS = 2, | |
31daabda TH |
90 | }; |
91 | ||
92 | /* The following table determines how we sequence resets. Each entry | |
93 | * represents timeout for that try. The first try can be soft or | |
94 | * hardreset. All others are hardreset if available. In most cases | |
95 | * the first reset w/ 10sec timeout should succeed. Following entries | |
96 | * are mostly for error handling, hotplug and retarded devices. | |
97 | */ | |
98 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
99 | 10000, /* most drives spin up by 10sec */ |
100 | 10000, /* > 99% working drives spin up before 20sec */ | |
101 | 35000, /* give > 30 secs of idleness for retarded devices */ | |
102 | 5000, /* and sweet one last chance */ | |
d8af0eb6 | 103 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
104 | }; |
105 | ||
87fbc5a0 TH |
106 | static const unsigned long ata_eh_identify_timeouts[] = { |
107 | 5000, /* covers > 99% of successes and not too boring on failures */ | |
108 | 10000, /* combined time till here is enough even for media access */ | |
109 | 30000, /* for true idiots */ | |
110 | ULONG_MAX, | |
111 | }; | |
112 | ||
113 | static const unsigned long ata_eh_other_timeouts[] = { | |
114 | 5000, /* same rationale as identify timeout */ | |
115 | 10000, /* ditto */ | |
116 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
117 | ULONG_MAX, | |
118 | }; | |
119 | ||
120 | struct ata_eh_cmd_timeout_ent { | |
121 | const u8 *commands; | |
122 | const unsigned long *timeouts; | |
123 | }; | |
124 | ||
125 | /* The following table determines timeouts to use for EH internal | |
126 | * commands. Each table entry is a command class and matches the | |
127 | * commands the entry applies to and the timeout table to use. | |
128 | * | |
129 | * On the retry after a command timed out, the next timeout value from | |
130 | * the table is used. If the table doesn't contain further entries, | |
131 | * the last value is used. | |
132 | * | |
133 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
134 | * command class, so if SET_FEATURES times out on the first try, the | |
135 | * next try will use the second timeout value only for that class. | |
136 | */ | |
137 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
138 | static const struct ata_eh_cmd_timeout_ent | |
139 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
140 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
141 | .timeouts = ata_eh_identify_timeouts, }, | |
142 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), | |
143 | .timeouts = ata_eh_other_timeouts, }, | |
144 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
145 | .timeouts = ata_eh_other_timeouts, }, | |
146 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
147 | .timeouts = ata_eh_other_timeouts, }, | |
148 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
149 | .timeouts = ata_eh_other_timeouts, }, | |
150 | }; | |
151 | #undef CMDS | |
152 | ||
ad9e2762 | 153 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 154 | #ifdef CONFIG_PM |
500530f6 TH |
155 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
156 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
157 | #else /* CONFIG_PM */ |
158 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
159 | { } | |
160 | ||
161 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
162 | { } | |
6ffa01d8 | 163 | #endif /* CONFIG_PM */ |
ad9e2762 | 164 | |
b64bbc39 TH |
165 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
166 | va_list args) | |
167 | { | |
168 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
169 | ATA_EH_DESC_LEN - ehi->desc_len, | |
170 | fmt, args); | |
171 | } | |
172 | ||
173 | /** | |
174 | * __ata_ehi_push_desc - push error description without adding separator | |
175 | * @ehi: target EHI | |
176 | * @fmt: printf format string | |
177 | * | |
178 | * Format string according to @fmt and append it to @ehi->desc. | |
179 | * | |
180 | * LOCKING: | |
181 | * spin_lock_irqsave(host lock) | |
182 | */ | |
183 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
184 | { | |
185 | va_list args; | |
186 | ||
187 | va_start(args, fmt); | |
188 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
189 | va_end(args); | |
190 | } | |
191 | ||
192 | /** | |
193 | * ata_ehi_push_desc - push error description with separator | |
194 | * @ehi: target EHI | |
195 | * @fmt: printf format string | |
196 | * | |
197 | * Format string according to @fmt and append it to @ehi->desc. | |
198 | * If @ehi->desc is not empty, ", " is added in-between. | |
199 | * | |
200 | * LOCKING: | |
201 | * spin_lock_irqsave(host lock) | |
202 | */ | |
203 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
204 | { | |
205 | va_list args; | |
206 | ||
207 | if (ehi->desc_len) | |
208 | __ata_ehi_push_desc(ehi, ", "); | |
209 | ||
210 | va_start(args, fmt); | |
211 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
212 | va_end(args); | |
213 | } | |
214 | ||
215 | /** | |
216 | * ata_ehi_clear_desc - clean error description | |
217 | * @ehi: target EHI | |
218 | * | |
219 | * Clear @ehi->desc. | |
220 | * | |
221 | * LOCKING: | |
222 | * spin_lock_irqsave(host lock) | |
223 | */ | |
224 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
225 | { | |
226 | ehi->desc[0] = '\0'; | |
227 | ehi->desc_len = 0; | |
228 | } | |
229 | ||
cbcdd875 TH |
230 | /** |
231 | * ata_port_desc - append port description | |
232 | * @ap: target ATA port | |
233 | * @fmt: printf format string | |
234 | * | |
235 | * Format string according to @fmt and append it to port | |
236 | * description. If port description is not empty, " " is added | |
237 | * in-between. This function is to be used while initializing | |
238 | * ata_host. The description is printed on host registration. | |
239 | * | |
240 | * LOCKING: | |
241 | * None. | |
242 | */ | |
243 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
244 | { | |
245 | va_list args; | |
246 | ||
247 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
248 | ||
249 | if (ap->link.eh_info.desc_len) | |
250 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
251 | ||
252 | va_start(args, fmt); | |
253 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
254 | va_end(args); | |
255 | } | |
256 | ||
257 | #ifdef CONFIG_PCI | |
258 | ||
259 | /** | |
260 | * ata_port_pbar_desc - append PCI BAR description | |
261 | * @ap: target ATA port | |
262 | * @bar: target PCI BAR | |
263 | * @offset: offset into PCI BAR | |
264 | * @name: name of the area | |
265 | * | |
266 | * If @offset is negative, this function formats a string which | |
267 | * contains the name, address, size and type of the BAR and | |
268 | * appends it to the port description. If @offset is zero or | |
269 | * positive, only name and offsetted address is appended. | |
270 | * | |
271 | * LOCKING: | |
272 | * None. | |
273 | */ | |
274 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
275 | const char *name) | |
276 | { | |
277 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
278 | char *type = ""; | |
279 | unsigned long long start, len; | |
280 | ||
281 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
282 | type = "m"; | |
283 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
284 | type = "i"; | |
285 | ||
286 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
287 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
288 | ||
289 | if (offset < 0) | |
290 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
291 | else | |
e6a73ab1 AM |
292 | ata_port_desc(ap, "%s 0x%llx", name, |
293 | start + (unsigned long long)offset); | |
cbcdd875 TH |
294 | } |
295 | ||
296 | #endif /* CONFIG_PCI */ | |
297 | ||
87fbc5a0 TH |
298 | static int ata_lookup_timeout_table(u8 cmd) |
299 | { | |
300 | int i; | |
301 | ||
302 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
303 | const u8 *cur; | |
304 | ||
305 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
306 | if (*cur == cmd) | |
307 | return i; | |
308 | } | |
309 | ||
310 | return -1; | |
311 | } | |
312 | ||
313 | /** | |
314 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
315 | * @dev: target device | |
316 | * @cmd: internal command to be issued | |
317 | * | |
318 | * Determine timeout for internal command @cmd for @dev. | |
319 | * | |
320 | * LOCKING: | |
321 | * EH context. | |
322 | * | |
323 | * RETURNS: | |
324 | * Determined timeout. | |
325 | */ | |
326 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) | |
327 | { | |
328 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
329 | int ent = ata_lookup_timeout_table(cmd); | |
330 | int idx; | |
331 | ||
332 | if (ent < 0) | |
333 | return ATA_EH_CMD_DFL_TIMEOUT; | |
334 | ||
335 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
336 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
337 | } | |
338 | ||
339 | /** | |
340 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
341 | * @dev: target device | |
342 | * @cmd: internal command which timed out | |
343 | * | |
344 | * Notify EH that internal command @cmd for @dev timed out. This | |
345 | * function should be called only for commands whose timeouts are | |
346 | * determined using ata_internal_cmd_timeout(). | |
347 | * | |
348 | * LOCKING: | |
349 | * EH context. | |
350 | */ | |
351 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
352 | { | |
353 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
354 | int ent = ata_lookup_timeout_table(cmd); | |
355 | int idx; | |
356 | ||
357 | if (ent < 0) | |
358 | return; | |
359 | ||
360 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
361 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) | |
362 | ehc->cmd_timeout_idx[dev->devno][ent]++; | |
363 | } | |
364 | ||
3884f7b0 | 365 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
366 | unsigned int err_mask) |
367 | { | |
368 | struct ata_ering_entry *ent; | |
369 | ||
370 | WARN_ON(!err_mask); | |
371 | ||
372 | ering->cursor++; | |
373 | ering->cursor %= ATA_ERING_SIZE; | |
374 | ||
375 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 376 | ent->eflags = eflags; |
0c247c55 TH |
377 | ent->err_mask = err_mask; |
378 | ent->timestamp = get_jiffies_64(); | |
379 | } | |
380 | ||
76326ac1 TH |
381 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
382 | { | |
383 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
384 | ||
385 | if (ent->err_mask) | |
386 | return ent; | |
387 | return NULL; | |
388 | } | |
389 | ||
7d47e8d4 | 390 | static void ata_ering_clear(struct ata_ering *ering) |
0c247c55 | 391 | { |
7d47e8d4 | 392 | memset(ering, 0, sizeof(*ering)); |
0c247c55 TH |
393 | } |
394 | ||
395 | static int ata_ering_map(struct ata_ering *ering, | |
396 | int (*map_fn)(struct ata_ering_entry *, void *), | |
397 | void *arg) | |
398 | { | |
399 | int idx, rc = 0; | |
400 | struct ata_ering_entry *ent; | |
401 | ||
402 | idx = ering->cursor; | |
403 | do { | |
404 | ent = &ering->ring[idx]; | |
405 | if (!ent->err_mask) | |
406 | break; | |
407 | rc = map_fn(ent, arg); | |
408 | if (rc) | |
409 | break; | |
410 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
411 | } while (idx != ering->cursor); | |
412 | ||
413 | return rc; | |
414 | } | |
415 | ||
64f65ca6 TH |
416 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
417 | { | |
9af5c9c9 | 418 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
419 | |
420 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
421 | } | |
422 | ||
f58229f8 | 423 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
424 | struct ata_eh_info *ehi, unsigned int action) |
425 | { | |
f58229f8 | 426 | struct ata_device *tdev; |
af181c2d TH |
427 | |
428 | if (!dev) { | |
429 | ehi->action &= ~action; | |
1eca4365 | 430 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 431 | ehi->dev_action[tdev->devno] &= ~action; |
af181c2d TH |
432 | } else { |
433 | /* doesn't make sense for port-wide EH actions */ | |
434 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
435 | ||
436 | /* break ehi->action into ehi->dev_action */ | |
437 | if (ehi->action & action) { | |
1eca4365 | 438 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
439 | ehi->dev_action[tdev->devno] |= |
440 | ehi->action & action; | |
af181c2d TH |
441 | ehi->action &= ~action; |
442 | } | |
443 | ||
444 | /* turn off the specified per-dev action */ | |
445 | ehi->dev_action[dev->devno] &= ~action; | |
446 | } | |
447 | } | |
448 | ||
ece1d636 TH |
449 | /** |
450 | * ata_scsi_timed_out - SCSI layer time out callback | |
451 | * @cmd: timed out SCSI command | |
452 | * | |
453 | * Handles SCSI layer timeout. We race with normal completion of | |
454 | * the qc for @cmd. If the qc is already gone, we lose and let | |
455 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has | |
456 | * timed out and EH should be invoked. Prevent ata_qc_complete() | |
457 | * from finishing it by setting EH_SCHEDULED and return | |
458 | * EH_NOT_HANDLED. | |
459 | * | |
ad9e2762 TH |
460 | * TODO: kill this function once old EH is gone. |
461 | * | |
ece1d636 TH |
462 | * LOCKING: |
463 | * Called from timer context | |
464 | * | |
465 | * RETURNS: | |
466 | * EH_HANDLED or EH_NOT_HANDLED | |
467 | */ | |
242f9dcb | 468 | enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) |
ece1d636 TH |
469 | { |
470 | struct Scsi_Host *host = cmd->device->host; | |
35bb94b1 | 471 | struct ata_port *ap = ata_shost_to_port(host); |
ece1d636 TH |
472 | unsigned long flags; |
473 | struct ata_queued_cmd *qc; | |
242f9dcb | 474 | enum blk_eh_timer_return ret; |
ece1d636 TH |
475 | |
476 | DPRINTK("ENTER\n"); | |
477 | ||
ad9e2762 | 478 | if (ap->ops->error_handler) { |
242f9dcb | 479 | ret = BLK_EH_NOT_HANDLED; |
ad9e2762 TH |
480 | goto out; |
481 | } | |
482 | ||
242f9dcb | 483 | ret = BLK_EH_HANDLED; |
ba6a1308 | 484 | spin_lock_irqsave(ap->lock, flags); |
9af5c9c9 | 485 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
ece1d636 TH |
486 | if (qc) { |
487 | WARN_ON(qc->scsicmd != cmd); | |
488 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; | |
489 | qc->err_mask |= AC_ERR_TIMEOUT; | |
242f9dcb | 490 | ret = BLK_EH_NOT_HANDLED; |
ece1d636 | 491 | } |
ba6a1308 | 492 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 493 | |
ad9e2762 | 494 | out: |
ece1d636 TH |
495 | DPRINTK("EXIT, ret=%d\n", ret); |
496 | return ret; | |
497 | } | |
498 | ||
ece180d1 TH |
499 | static void ata_eh_unload(struct ata_port *ap) |
500 | { | |
501 | struct ata_link *link; | |
502 | struct ata_device *dev; | |
503 | unsigned long flags; | |
504 | ||
505 | /* Restore SControl IPM and SPD for the next driver and | |
506 | * disable attached devices. | |
507 | */ | |
508 | ata_for_each_link(link, ap, PMP_FIRST) { | |
509 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
510 | ata_for_each_dev(dev, link, ALL) | |
511 | ata_dev_disable(dev); | |
512 | } | |
513 | ||
514 | /* freeze and set UNLOADED */ | |
515 | spin_lock_irqsave(ap->lock, flags); | |
516 | ||
517 | ata_port_freeze(ap); /* won't be thawed */ | |
518 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
519 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
520 | ||
521 | spin_unlock_irqrestore(ap->lock, flags); | |
522 | } | |
523 | ||
ece1d636 TH |
524 | /** |
525 | * ata_scsi_error - SCSI layer error handler callback | |
526 | * @host: SCSI host on which error occurred | |
527 | * | |
528 | * Handles SCSI-layer-thrown error events. | |
529 | * | |
530 | * LOCKING: | |
531 | * Inherited from SCSI layer (none, can sleep) | |
532 | * | |
533 | * RETURNS: | |
534 | * Zero. | |
535 | */ | |
381544bb | 536 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 537 | { |
35bb94b1 | 538 | struct ata_port *ap = ata_shost_to_port(host); |
a1e10f7e | 539 | int i; |
ad9e2762 | 540 | unsigned long flags; |
ece1d636 TH |
541 | |
542 | DPRINTK("ENTER\n"); | |
543 | ||
ad9e2762 | 544 | /* synchronize with port task */ |
ece1d636 TH |
545 | ata_port_flush_task(ap); |
546 | ||
cca3974e | 547 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
548 | |
549 | /* For new EH, all qcs are finished in one of three ways - | |
550 | * normal completion, error completion, and SCSI timeout. | |
c96f1732 | 551 | * Both completions can race against SCSI timeout. When normal |
ad9e2762 TH |
552 | * completion wins, the qc never reaches EH. When error |
553 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
554 | * | |
555 | * When SCSI timeout wins, things are a bit more complex. | |
556 | * Normal or error completion can occur after the timeout but | |
557 | * before this point. In such cases, both types of | |
558 | * completions are honored. A scmd is determined to have | |
559 | * timed out iff its associated qc is active and not failed. | |
560 | */ | |
561 | if (ap->ops->error_handler) { | |
562 | struct scsi_cmnd *scmd, *tmp; | |
563 | int nr_timedout = 0; | |
564 | ||
e30349d2 | 565 | spin_lock_irqsave(ap->lock, flags); |
c96f1732 AC |
566 | |
567 | /* This must occur under the ap->lock as we don't want | |
568 | a polled recovery to race the real interrupt handler | |
569 | ||
570 | The lost_interrupt handler checks for any completed but | |
571 | non-notified command and completes much like an IRQ handler. | |
572 | ||
573 | We then fall into the error recovery code which will treat | |
574 | this as if normal completion won the race */ | |
575 | ||
576 | if (ap->ops->lost_interrupt) | |
577 | ap->ops->lost_interrupt(ap); | |
578 | ||
ad9e2762 TH |
579 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { |
580 | struct ata_queued_cmd *qc; | |
581 | ||
582 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
583 | qc = __ata_qc_from_tag(ap, i); | |
584 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
585 | qc->scsicmd == scmd) | |
586 | break; | |
587 | } | |
588 | ||
589 | if (i < ATA_MAX_QUEUE) { | |
590 | /* the scmd has an associated qc */ | |
591 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
592 | /* which hasn't failed yet, timeout */ | |
593 | qc->err_mask |= AC_ERR_TIMEOUT; | |
594 | qc->flags |= ATA_QCFLAG_FAILED; | |
595 | nr_timedout++; | |
596 | } | |
597 | } else { | |
598 | /* Normal completion occurred after | |
599 | * SCSI timeout but before this point. | |
600 | * Successfully complete it. | |
601 | */ | |
602 | scmd->retries = scmd->allowed; | |
603 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
604 | } | |
605 | } | |
606 | ||
607 | /* If we have timed out qcs. They belong to EH from | |
608 | * this point but the state of the controller is | |
609 | * unknown. Freeze the port to make sure the IRQ | |
610 | * handler doesn't diddle with those qcs. This must | |
611 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
612 | */ | |
613 | if (nr_timedout) | |
614 | __ata_port_freeze(ap); | |
615 | ||
e30349d2 | 616 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
617 | |
618 | /* initialize eh_tries */ | |
619 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 620 | } else |
e30349d2 | 621 | spin_unlock_wait(ap->lock); |
c96f1732 AC |
622 | |
623 | /* If we timed raced normal completion and there is nothing to | |
624 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ | |
ad9e2762 TH |
625 | |
626 | repeat: | |
627 | /* invoke error handler */ | |
628 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
629 | struct ata_link *link; |
630 | ||
5ddf24c5 TH |
631 | /* kill fast drain timer */ |
632 | del_timer_sync(&ap->fastdrain_timer); | |
633 | ||
500530f6 TH |
634 | /* process port resume request */ |
635 | ata_eh_handle_port_resume(ap); | |
636 | ||
f3e81b19 | 637 | /* fetch & clear EH info */ |
e30349d2 | 638 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 639 | |
1eca4365 | 640 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
641 | struct ata_eh_context *ehc = &link->eh_context; |
642 | struct ata_device *dev; | |
643 | ||
cf1b86c8 TH |
644 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
645 | link->eh_context.i = link->eh_info; | |
646 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 647 | |
1eca4365 | 648 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
649 | int devno = dev->devno; |
650 | ||
651 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
652 | if (ata_ncq_enabled(dev)) | |
653 | ehc->saved_ncq_enabled |= 1 << devno; | |
654 | } | |
cf1b86c8 | 655 | } |
f3e81b19 | 656 | |
b51e9e5d TH |
657 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
658 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 659 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 660 | |
e30349d2 | 661 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 662 | |
500530f6 TH |
663 | /* invoke EH, skip if unloading or suspended */ |
664 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 665 | ap->ops->error_handler(ap); |
ece180d1 TH |
666 | else { |
667 | /* if unloading, commence suicide */ | |
668 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
669 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
670 | ata_eh_unload(ap); | |
720ba126 | 671 | ata_eh_finish(ap); |
ece180d1 | 672 | } |
ad9e2762 | 673 | |
500530f6 TH |
674 | /* process port suspend request */ |
675 | ata_eh_handle_port_suspend(ap); | |
676 | ||
ad9e2762 TH |
677 | /* Exception might have happend after ->error_handler |
678 | * recovered the port but before this point. Repeat | |
679 | * EH in such case. | |
680 | */ | |
e30349d2 | 681 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 682 | |
b51e9e5d | 683 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 684 | if (--ap->eh_tries) { |
e30349d2 | 685 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
686 | goto repeat; |
687 | } | |
688 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " | |
a1e10f7e | 689 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
914616a3 | 690 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
691 | } |
692 | ||
f3e81b19 | 693 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 694 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 695 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 696 | |
e30349d2 | 697 | /* Clear host_eh_scheduled while holding ap->lock such |
ad9e2762 TH |
698 | * that if exception occurs after this point but |
699 | * before EH completion, SCSI midlayer will | |
700 | * re-initiate EH. | |
701 | */ | |
702 | host->host_eh_scheduled = 0; | |
703 | ||
e30349d2 | 704 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 705 | } else { |
9af5c9c9 | 706 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
707 | ap->ops->eng_timeout(ap); |
708 | } | |
ece1d636 | 709 | |
ad9e2762 | 710 | /* finish or retry handled scmd's and clean up */ |
ece1d636 TH |
711 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
712 | ||
713 | scsi_eh_flush_done_q(&ap->eh_done_q); | |
714 | ||
ad9e2762 | 715 | /* clean up */ |
e30349d2 | 716 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 717 | |
1cdaf534 | 718 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 719 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 720 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
52bad64d | 721 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, 0); |
1cdaf534 TH |
722 | |
723 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
724 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); | |
580b2102 | 725 | |
b51e9e5d | 726 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 727 | |
c6cf9e99 | 728 | /* tell wait_eh that we're done */ |
b51e9e5d | 729 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
730 | wake_up_all(&ap->eh_wait_q); |
731 | ||
e30349d2 | 732 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 733 | |
ece1d636 | 734 | DPRINTK("EXIT\n"); |
ece1d636 TH |
735 | } |
736 | ||
c6cf9e99 TH |
737 | /** |
738 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
739 | * @ap: Port to wait EH for | |
740 | * | |
741 | * Wait until the currently pending EH is complete. | |
742 | * | |
743 | * LOCKING: | |
744 | * Kernel thread context (may sleep). | |
745 | */ | |
746 | void ata_port_wait_eh(struct ata_port *ap) | |
747 | { | |
748 | unsigned long flags; | |
749 | DEFINE_WAIT(wait); | |
750 | ||
751 | retry: | |
ba6a1308 | 752 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 753 | |
b51e9e5d | 754 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 755 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 756 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 757 | schedule(); |
ba6a1308 | 758 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 759 | } |
0a1b622e | 760 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 761 | |
ba6a1308 | 762 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
763 | |
764 | /* make sure SCSI EH is complete */ | |
cca3974e | 765 | if (scsi_host_in_recovery(ap->scsi_host)) { |
c6cf9e99 TH |
766 | msleep(10); |
767 | goto retry; | |
768 | } | |
769 | } | |
770 | ||
5ddf24c5 TH |
771 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
772 | { | |
773 | unsigned int tag; | |
774 | int nr = 0; | |
775 | ||
776 | /* count only non-internal commands */ | |
777 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
778 | if (ata_qc_from_tag(ap, tag)) | |
779 | nr++; | |
780 | ||
781 | return nr; | |
782 | } | |
783 | ||
784 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
785 | { | |
786 | struct ata_port *ap = (void *)arg; | |
787 | unsigned long flags; | |
788 | int cnt; | |
789 | ||
790 | spin_lock_irqsave(ap->lock, flags); | |
791 | ||
792 | cnt = ata_eh_nr_in_flight(ap); | |
793 | ||
794 | /* are we done? */ | |
795 | if (!cnt) | |
796 | goto out_unlock; | |
797 | ||
798 | if (cnt == ap->fastdrain_cnt) { | |
799 | unsigned int tag; | |
800 | ||
801 | /* No progress during the last interval, tag all | |
802 | * in-flight qcs as timed out and freeze the port. | |
803 | */ | |
804 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
805 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
806 | if (qc) | |
807 | qc->err_mask |= AC_ERR_TIMEOUT; | |
808 | } | |
809 | ||
810 | ata_port_freeze(ap); | |
811 | } else { | |
812 | /* some qcs have finished, give it another chance */ | |
813 | ap->fastdrain_cnt = cnt; | |
814 | ap->fastdrain_timer.expires = | |
341c2c95 | 815 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
816 | add_timer(&ap->fastdrain_timer); |
817 | } | |
818 | ||
819 | out_unlock: | |
820 | spin_unlock_irqrestore(ap->lock, flags); | |
821 | } | |
822 | ||
823 | /** | |
824 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
825 | * @ap: target ATA port | |
826 | * @fastdrain: activate fast drain | |
827 | * | |
828 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
829 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
830 | * that EH kicks in in timely manner. | |
831 | * | |
832 | * LOCKING: | |
833 | * spin_lock_irqsave(host lock) | |
834 | */ | |
835 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
836 | { | |
837 | int cnt; | |
838 | ||
839 | /* already scheduled? */ | |
840 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
841 | return; | |
842 | ||
843 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
844 | ||
845 | if (!fastdrain) | |
846 | return; | |
847 | ||
848 | /* do we have in-flight qcs? */ | |
849 | cnt = ata_eh_nr_in_flight(ap); | |
850 | if (!cnt) | |
851 | return; | |
852 | ||
853 | /* activate fast drain */ | |
854 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
855 | ap->fastdrain_timer.expires = |
856 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
857 | add_timer(&ap->fastdrain_timer); |
858 | } | |
859 | ||
f686bcb8 TH |
860 | /** |
861 | * ata_qc_schedule_eh - schedule qc for error handling | |
862 | * @qc: command to schedule error handling for | |
863 | * | |
864 | * Schedule error handling for @qc. EH will kick in as soon as | |
865 | * other commands are drained. | |
866 | * | |
867 | * LOCKING: | |
cca3974e | 868 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
869 | */ |
870 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
871 | { | |
872 | struct ata_port *ap = qc->ap; | |
873 | ||
874 | WARN_ON(!ap->ops->error_handler); | |
875 | ||
876 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 877 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
878 | |
879 | /* The following will fail if timeout has already expired. | |
880 | * ata_scsi_error() takes care of such scmds on EH entry. | |
881 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
882 | * this function completes. | |
883 | */ | |
242f9dcb | 884 | blk_abort_request(qc->scsicmd->request); |
f686bcb8 TH |
885 | } |
886 | ||
7b70fc03 TH |
887 | /** |
888 | * ata_port_schedule_eh - schedule error handling without a qc | |
889 | * @ap: ATA port to schedule EH for | |
890 | * | |
891 | * Schedule error handling for @ap. EH will kick in as soon as | |
892 | * all commands are drained. | |
893 | * | |
894 | * LOCKING: | |
cca3974e | 895 | * spin_lock_irqsave(host lock) |
7b70fc03 TH |
896 | */ |
897 | void ata_port_schedule_eh(struct ata_port *ap) | |
898 | { | |
899 | WARN_ON(!ap->ops->error_handler); | |
900 | ||
f4d6d004 TH |
901 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
902 | return; | |
903 | ||
5ddf24c5 | 904 | ata_eh_set_pending(ap, 1); |
cca3974e | 905 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
906 | |
907 | DPRINTK("port EH scheduled\n"); | |
908 | } | |
909 | ||
dbd82616 | 910 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
911 | { |
912 | int tag, nr_aborted = 0; | |
913 | ||
914 | WARN_ON(!ap->ops->error_handler); | |
915 | ||
5ddf24c5 TH |
916 | /* we're gonna abort all commands, no need for fast drain */ |
917 | ata_eh_set_pending(ap, 0); | |
918 | ||
7b70fc03 TH |
919 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
920 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
921 | ||
dbd82616 | 922 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
923 | qc->flags |= ATA_QCFLAG_FAILED; |
924 | ata_qc_complete(qc); | |
925 | nr_aborted++; | |
926 | } | |
927 | } | |
928 | ||
929 | if (!nr_aborted) | |
930 | ata_port_schedule_eh(ap); | |
931 | ||
932 | return nr_aborted; | |
933 | } | |
934 | ||
dbd82616 TH |
935 | /** |
936 | * ata_link_abort - abort all qc's on the link | |
937 | * @link: ATA link to abort qc's for | |
938 | * | |
939 | * Abort all active qc's active on @link and schedule EH. | |
940 | * | |
941 | * LOCKING: | |
942 | * spin_lock_irqsave(host lock) | |
943 | * | |
944 | * RETURNS: | |
945 | * Number of aborted qc's. | |
946 | */ | |
947 | int ata_link_abort(struct ata_link *link) | |
948 | { | |
949 | return ata_do_link_abort(link->ap, link); | |
950 | } | |
951 | ||
952 | /** | |
953 | * ata_port_abort - abort all qc's on the port | |
954 | * @ap: ATA port to abort qc's for | |
955 | * | |
956 | * Abort all active qc's of @ap and schedule EH. | |
957 | * | |
958 | * LOCKING: | |
959 | * spin_lock_irqsave(host_set lock) | |
960 | * | |
961 | * RETURNS: | |
962 | * Number of aborted qc's. | |
963 | */ | |
964 | int ata_port_abort(struct ata_port *ap) | |
965 | { | |
966 | return ata_do_link_abort(ap, NULL); | |
967 | } | |
968 | ||
e3180499 TH |
969 | /** |
970 | * __ata_port_freeze - freeze port | |
971 | * @ap: ATA port to freeze | |
972 | * | |
973 | * This function is called when HSM violation or some other | |
974 | * condition disrupts normal operation of the port. Frozen port | |
975 | * is not allowed to perform any operation until the port is | |
976 | * thawed, which usually follows a successful reset. | |
977 | * | |
978 | * ap->ops->freeze() callback can be used for freezing the port | |
979 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
980 | * port cannot be frozen hardware-wise, the interrupt handler | |
981 | * must ack and clear interrupts unconditionally while the port | |
982 | * is frozen. | |
983 | * | |
984 | * LOCKING: | |
cca3974e | 985 | * spin_lock_irqsave(host lock) |
e3180499 TH |
986 | */ |
987 | static void __ata_port_freeze(struct ata_port *ap) | |
988 | { | |
989 | WARN_ON(!ap->ops->error_handler); | |
990 | ||
991 | if (ap->ops->freeze) | |
992 | ap->ops->freeze(ap); | |
993 | ||
b51e9e5d | 994 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 995 | |
44877b4e | 996 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
997 | } |
998 | ||
999 | /** | |
1000 | * ata_port_freeze - abort & freeze port | |
1001 | * @ap: ATA port to freeze | |
1002 | * | |
54c38444 JG |
1003 | * Abort and freeze @ap. The freeze operation must be called |
1004 | * first, because some hardware requires special operations | |
1005 | * before the taskfile registers are accessible. | |
e3180499 TH |
1006 | * |
1007 | * LOCKING: | |
cca3974e | 1008 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1009 | * |
1010 | * RETURNS: | |
1011 | * Number of aborted commands. | |
1012 | */ | |
1013 | int ata_port_freeze(struct ata_port *ap) | |
1014 | { | |
1015 | int nr_aborted; | |
1016 | ||
1017 | WARN_ON(!ap->ops->error_handler); | |
1018 | ||
e3180499 | 1019 | __ata_port_freeze(ap); |
54c38444 | 1020 | nr_aborted = ata_port_abort(ap); |
e3180499 TH |
1021 | |
1022 | return nr_aborted; | |
1023 | } | |
1024 | ||
7d77b247 TH |
1025 | /** |
1026 | * sata_async_notification - SATA async notification handler | |
1027 | * @ap: ATA port where async notification is received | |
1028 | * | |
1029 | * Handler to be called when async notification via SDB FIS is | |
1030 | * received. This function schedules EH if necessary. | |
1031 | * | |
1032 | * LOCKING: | |
1033 | * spin_lock_irqsave(host lock) | |
1034 | * | |
1035 | * RETURNS: | |
1036 | * 1 if EH is scheduled, 0 otherwise. | |
1037 | */ | |
1038 | int sata_async_notification(struct ata_port *ap) | |
1039 | { | |
1040 | u32 sntf; | |
1041 | int rc; | |
1042 | ||
1043 | if (!(ap->flags & ATA_FLAG_AN)) | |
1044 | return 0; | |
1045 | ||
1046 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
1047 | if (rc == 0) | |
1048 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1049 | ||
071f44b1 | 1050 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1051 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1052 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1053 | /* PMP is not attached. Check whether ATAPI |
1054 | * AN is configured. If so, notify media | |
1055 | * change. | |
1056 | */ | |
1057 | struct ata_device *dev = ap->link.device; | |
1058 | ||
1059 | if ((dev->class == ATA_DEV_ATAPI) && | |
1060 | (dev->flags & ATA_DFLAG_AN)) | |
1061 | ata_scsi_media_change_notify(dev); | |
1062 | return 0; | |
1063 | } else { | |
1064 | /* PMP is attached but SNTF is not available. | |
1065 | * ATAPI async media change notification is | |
1066 | * not used. The PMP must be reporting PHY | |
1067 | * status change, schedule EH. | |
1068 | */ | |
1069 | ata_port_schedule_eh(ap); | |
1070 | return 1; | |
1071 | } | |
1072 | } else { | |
1073 | /* PMP is attached and SNTF is available */ | |
1074 | struct ata_link *link; | |
1075 | ||
1076 | /* check and notify ATAPI AN */ | |
1eca4365 | 1077 | ata_for_each_link(link, ap, EDGE) { |
7d77b247 TH |
1078 | if (!(sntf & (1 << link->pmp))) |
1079 | continue; | |
1080 | ||
1081 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1082 | (link->device->flags & ATA_DFLAG_AN)) | |
1083 | ata_scsi_media_change_notify(link->device); | |
1084 | } | |
1085 | ||
1086 | /* If PMP is reporting that PHY status of some | |
1087 | * downstream ports has changed, schedule EH. | |
1088 | */ | |
1089 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1090 | ata_port_schedule_eh(ap); | |
1091 | return 1; | |
1092 | } | |
1093 | ||
1094 | return 0; | |
1095 | } | |
1096 | } | |
1097 | ||
e3180499 TH |
1098 | /** |
1099 | * ata_eh_freeze_port - EH helper to freeze port | |
1100 | * @ap: ATA port to freeze | |
1101 | * | |
1102 | * Freeze @ap. | |
1103 | * | |
1104 | * LOCKING: | |
1105 | * None. | |
1106 | */ | |
1107 | void ata_eh_freeze_port(struct ata_port *ap) | |
1108 | { | |
1109 | unsigned long flags; | |
1110 | ||
1111 | if (!ap->ops->error_handler) | |
1112 | return; | |
1113 | ||
ba6a1308 | 1114 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1115 | __ata_port_freeze(ap); |
ba6a1308 | 1116 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1117 | } |
1118 | ||
1119 | /** | |
1120 | * ata_port_thaw_port - EH helper to thaw port | |
1121 | * @ap: ATA port to thaw | |
1122 | * | |
1123 | * Thaw frozen port @ap. | |
1124 | * | |
1125 | * LOCKING: | |
1126 | * None. | |
1127 | */ | |
1128 | void ata_eh_thaw_port(struct ata_port *ap) | |
1129 | { | |
1130 | unsigned long flags; | |
1131 | ||
1132 | if (!ap->ops->error_handler) | |
1133 | return; | |
1134 | ||
ba6a1308 | 1135 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1136 | |
b51e9e5d | 1137 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1138 | |
1139 | if (ap->ops->thaw) | |
1140 | ap->ops->thaw(ap); | |
1141 | ||
ba6a1308 | 1142 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1143 | |
44877b4e | 1144 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1145 | } |
1146 | ||
ece1d636 TH |
1147 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1148 | { | |
1149 | /* nada */ | |
1150 | } | |
1151 | ||
1152 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1153 | { | |
1154 | struct ata_port *ap = qc->ap; | |
1155 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1156 | unsigned long flags; | |
1157 | ||
ba6a1308 | 1158 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1159 | qc->scsidone = ata_eh_scsidone; |
1160 | __ata_qc_complete(qc); | |
1161 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1162 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1163 | |
1164 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1165 | } | |
1166 | ||
1167 | /** | |
1168 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1169 | * @qc: Command to complete | |
1170 | * | |
1171 | * Indicate to the mid and upper layers that an ATA command has | |
1172 | * completed. To be used from EH. | |
1173 | */ | |
1174 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1175 | { | |
1176 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1177 | scmd->retries = scmd->allowed; | |
1178 | __ata_eh_qc_complete(qc); | |
1179 | } | |
1180 | ||
1181 | /** | |
1182 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1183 | * @qc: Command to retry | |
1184 | * | |
1185 | * Indicate to the mid and upper layers that an ATA command | |
1186 | * should be retried. To be used from EH. | |
1187 | * | |
1188 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
1189 | * scmd->retries is decremented for commands which get retried | |
1190 | * due to unrelated failures (qc->err_mask is zero). | |
1191 | */ | |
1192 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1193 | { | |
1194 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1195 | if (!qc->err_mask && scmd->retries) | |
1196 | scmd->retries--; | |
1197 | __ata_eh_qc_complete(qc); | |
1198 | } | |
022bdb07 | 1199 | |
678afac6 TH |
1200 | /** |
1201 | * ata_dev_disable - disable ATA device | |
1202 | * @dev: ATA device to disable | |
1203 | * | |
1204 | * Disable @dev. | |
1205 | * | |
1206 | * Locking: | |
1207 | * EH context. | |
1208 | */ | |
1209 | void ata_dev_disable(struct ata_device *dev) | |
1210 | { | |
1211 | if (!ata_dev_enabled(dev)) | |
1212 | return; | |
1213 | ||
1214 | if (ata_msg_drv(dev->link->ap)) | |
1215 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); | |
1216 | ata_acpi_on_disable(dev); | |
1217 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1218 | dev->class++; | |
99cf610a TH |
1219 | |
1220 | /* From now till the next successful probe, ering is used to | |
1221 | * track probe failures. Clear accumulated device error info. | |
1222 | */ | |
1223 | ata_ering_clear(&dev->ering); | |
678afac6 TH |
1224 | } |
1225 | ||
0ea035a3 TH |
1226 | /** |
1227 | * ata_eh_detach_dev - detach ATA device | |
1228 | * @dev: ATA device to detach | |
1229 | * | |
1230 | * Detach @dev. | |
1231 | * | |
1232 | * LOCKING: | |
1233 | * None. | |
1234 | */ | |
fb7fd614 | 1235 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1236 | { |
f58229f8 TH |
1237 | struct ata_link *link = dev->link; |
1238 | struct ata_port *ap = link->ap; | |
90484ebf | 1239 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1240 | unsigned long flags; |
1241 | ||
1242 | ata_dev_disable(dev); | |
1243 | ||
ba6a1308 | 1244 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1245 | |
1246 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1247 | ||
1248 | if (ata_scsi_offline_dev(dev)) { | |
1249 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1250 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1251 | } |
1252 | ||
90484ebf | 1253 | /* clear per-dev EH info */ |
f58229f8 TH |
1254 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1255 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1256 | ehc->saved_xfer_mode[dev->devno] = 0; |
1257 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1258 | |
ba6a1308 | 1259 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1260 | } |
1261 | ||
022bdb07 TH |
1262 | /** |
1263 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1264 | * @link: target ATA link |
47005f25 | 1265 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1266 | * @action: action about to be performed |
1267 | * | |
1268 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1269 | * in @link->eh_info such that eh actions are not unnecessarily |
1270 | * repeated. | |
022bdb07 TH |
1271 | * |
1272 | * LOCKING: | |
1273 | * None. | |
1274 | */ | |
fb7fd614 TH |
1275 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1276 | unsigned int action) | |
022bdb07 | 1277 | { |
955e57df TH |
1278 | struct ata_port *ap = link->ap; |
1279 | struct ata_eh_info *ehi = &link->eh_info; | |
1280 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1281 | unsigned long flags; |
1282 | ||
ba6a1308 | 1283 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1284 | |
955e57df | 1285 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1286 | |
a568d1d2 TH |
1287 | /* About to take EH action, set RECOVERED. Ignore actions on |
1288 | * slave links as master will do them again. | |
1289 | */ | |
1290 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1291 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1292 | ||
ba6a1308 | 1293 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1294 | } |
1295 | ||
47005f25 TH |
1296 | /** |
1297 | * ata_eh_done - EH action complete | |
955e57df | 1298 | * @ap: target ATA port |
47005f25 TH |
1299 | * @dev: target ATA dev for per-dev action (can be NULL) |
1300 | * @action: action just completed | |
1301 | * | |
1302 | * Called right after performing EH actions to clear related bits | |
955e57df | 1303 | * in @link->eh_context. |
47005f25 TH |
1304 | * |
1305 | * LOCKING: | |
1306 | * None. | |
1307 | */ | |
fb7fd614 TH |
1308 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1309 | unsigned int action) | |
47005f25 | 1310 | { |
955e57df | 1311 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1312 | |
955e57df | 1313 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1314 | } |
1315 | ||
022bdb07 TH |
1316 | /** |
1317 | * ata_err_string - convert err_mask to descriptive string | |
1318 | * @err_mask: error mask to convert to string | |
1319 | * | |
1320 | * Convert @err_mask to descriptive string. Errors are | |
1321 | * prioritized according to severity and only the most severe | |
1322 | * error is reported. | |
1323 | * | |
1324 | * LOCKING: | |
1325 | * None. | |
1326 | * | |
1327 | * RETURNS: | |
1328 | * Descriptive string for @err_mask | |
1329 | */ | |
2dcb407e | 1330 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1331 | { |
1332 | if (err_mask & AC_ERR_HOST_BUS) | |
1333 | return "host bus error"; | |
1334 | if (err_mask & AC_ERR_ATA_BUS) | |
1335 | return "ATA bus error"; | |
1336 | if (err_mask & AC_ERR_TIMEOUT) | |
1337 | return "timeout"; | |
1338 | if (err_mask & AC_ERR_HSM) | |
1339 | return "HSM violation"; | |
1340 | if (err_mask & AC_ERR_SYSTEM) | |
1341 | return "internal error"; | |
1342 | if (err_mask & AC_ERR_MEDIA) | |
1343 | return "media error"; | |
1344 | if (err_mask & AC_ERR_INVALID) | |
1345 | return "invalid argument"; | |
1346 | if (err_mask & AC_ERR_DEV) | |
1347 | return "device error"; | |
1348 | return "unknown error"; | |
1349 | } | |
1350 | ||
e8ee8451 TH |
1351 | /** |
1352 | * ata_read_log_page - read a specific log page | |
1353 | * @dev: target device | |
1354 | * @page: page to read | |
1355 | * @buf: buffer to store read page | |
1356 | * @sectors: number of sectors to read | |
1357 | * | |
1358 | * Read log page using READ_LOG_EXT command. | |
1359 | * | |
1360 | * LOCKING: | |
1361 | * Kernel thread context (may sleep). | |
1362 | * | |
1363 | * RETURNS: | |
1364 | * 0 on success, AC_ERR_* mask otherwise. | |
1365 | */ | |
1366 | static unsigned int ata_read_log_page(struct ata_device *dev, | |
1367 | u8 page, void *buf, unsigned int sectors) | |
1368 | { | |
1369 | struct ata_taskfile tf; | |
1370 | unsigned int err_mask; | |
1371 | ||
1372 | DPRINTK("read log page - page %d\n", page); | |
1373 | ||
1374 | ata_tf_init(dev, &tf); | |
1375 | tf.command = ATA_CMD_READ_LOG_EXT; | |
1376 | tf.lbal = page; | |
1377 | tf.nsect = sectors; | |
1378 | tf.hob_nsect = sectors >> 8; | |
1379 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
1380 | tf.protocol = ATA_PROT_PIO; | |
1381 | ||
1382 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1383 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 TH |
1384 | |
1385 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
1386 | return err_mask; | |
1387 | } | |
1388 | ||
1389 | /** | |
1390 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1391 | * @dev: Device to read log page 10h from | |
1392 | * @tag: Resulting tag of the failed command | |
1393 | * @tf: Resulting taskfile registers of the failed command | |
1394 | * | |
1395 | * Read log page 10h to obtain NCQ error details and clear error | |
1396 | * condition. | |
1397 | * | |
1398 | * LOCKING: | |
1399 | * Kernel thread context (may sleep). | |
1400 | * | |
1401 | * RETURNS: | |
1402 | * 0 on success, -errno otherwise. | |
1403 | */ | |
1404 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1405 | int *tag, struct ata_taskfile *tf) | |
1406 | { | |
9af5c9c9 | 1407 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1408 | unsigned int err_mask; |
1409 | u8 csum; | |
1410 | int i; | |
1411 | ||
1412 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); | |
1413 | if (err_mask) | |
1414 | return -EIO; | |
1415 | ||
1416 | csum = 0; | |
1417 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1418 | csum += buf[i]; | |
1419 | if (csum) | |
1420 | ata_dev_printk(dev, KERN_WARNING, | |
1421 | "invalid checksum 0x%x on log page 10h\n", csum); | |
1422 | ||
1423 | if (buf[0] & 0x80) | |
1424 | return -ENOENT; | |
1425 | ||
1426 | *tag = buf[0] & 0x1f; | |
1427 | ||
1428 | tf->command = buf[2]; | |
1429 | tf->feature = buf[3]; | |
1430 | tf->lbal = buf[4]; | |
1431 | tf->lbam = buf[5]; | |
1432 | tf->lbah = buf[6]; | |
1433 | tf->device = buf[7]; | |
1434 | tf->hob_lbal = buf[8]; | |
1435 | tf->hob_lbam = buf[9]; | |
1436 | tf->hob_lbah = buf[10]; | |
1437 | tf->nsect = buf[12]; | |
1438 | tf->hob_nsect = buf[13]; | |
1439 | ||
1440 | return 0; | |
1441 | } | |
1442 | ||
11fc33da TH |
1443 | /** |
1444 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1445 | * @dev: target ATAPI device | |
1446 | * @r_sense_key: out parameter for sense_key | |
1447 | * | |
1448 | * Perform ATAPI TEST_UNIT_READY. | |
1449 | * | |
1450 | * LOCKING: | |
1451 | * EH context (may sleep). | |
1452 | * | |
1453 | * RETURNS: | |
1454 | * 0 on success, AC_ERR_* mask on failure. | |
1455 | */ | |
1456 | static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) | |
1457 | { | |
1458 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1459 | struct ata_taskfile tf; | |
1460 | unsigned int err_mask; | |
1461 | ||
1462 | ata_tf_init(dev, &tf); | |
1463 | ||
1464 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1465 | tf.command = ATA_CMD_PACKET; | |
1466 | tf.protocol = ATAPI_PROT_NODATA; | |
1467 | ||
1468 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1469 | if (err_mask == AC_ERR_DEV) | |
1470 | *r_sense_key = tf.feature >> 4; | |
1471 | return err_mask; | |
1472 | } | |
1473 | ||
022bdb07 TH |
1474 | /** |
1475 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1476 | * @dev: device to perform REQUEST_SENSE to | |
1477 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1478 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1479 | * |
1480 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1481 | * SENSE. This function is EH helper. | |
1482 | * | |
1483 | * LOCKING: | |
1484 | * Kernel thread context (may sleep). | |
1485 | * | |
1486 | * RETURNS: | |
1487 | * 0 on success, AC_ERR_* mask on failure | |
1488 | */ | |
3eabddb8 TH |
1489 | static unsigned int atapi_eh_request_sense(struct ata_device *dev, |
1490 | u8 *sense_buf, u8 dfl_sense_key) | |
022bdb07 | 1491 | { |
3eabddb8 TH |
1492 | u8 cdb[ATAPI_CDB_LEN] = |
1493 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1494 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1495 | struct ata_taskfile tf; |
022bdb07 TH |
1496 | |
1497 | DPRINTK("ATAPI request sense\n"); | |
1498 | ||
022bdb07 TH |
1499 | /* FIXME: is this needed? */ |
1500 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
1501 | ||
56287768 AL |
1502 | /* initialize sense_buf with the error register, |
1503 | * for the case where they are -not- overwritten | |
1504 | */ | |
022bdb07 | 1505 | sense_buf[0] = 0x70; |
3eabddb8 | 1506 | sense_buf[2] = dfl_sense_key; |
56287768 | 1507 | |
a617c09f | 1508 | /* some devices time out if garbage left in tf */ |
56287768 | 1509 | ata_tf_init(dev, &tf); |
022bdb07 | 1510 | |
022bdb07 TH |
1511 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1512 | tf.command = ATA_CMD_PACKET; | |
1513 | ||
1514 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1515 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1516 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1517 | tf.feature |= ATAPI_PKT_DMA; |
1518 | } else { | |
0dc36888 | 1519 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1520 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1521 | tf.lbah = 0; | |
022bdb07 TH |
1522 | } |
1523 | ||
1524 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1525 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1526 | } |
1527 | ||
1528 | /** | |
1529 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1530 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1531 | * |
1532 | * Analyze SError if available and further determine cause of | |
1533 | * failure. | |
1534 | * | |
1535 | * LOCKING: | |
1536 | * None. | |
1537 | */ | |
0260731f | 1538 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1539 | { |
0260731f | 1540 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1541 | u32 serror = ehc->i.serror; |
1542 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1543 | u32 hotplug_mask; |
022bdb07 | 1544 | |
e0614db2 | 1545 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1546 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1547 | action |= ATA_EH_RESET; |
022bdb07 TH |
1548 | } |
1549 | if (serror & SERR_PROTOCOL) { | |
1550 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1551 | action |= ATA_EH_RESET; |
022bdb07 TH |
1552 | } |
1553 | if (serror & SERR_INTERNAL) { | |
1554 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1555 | action |= ATA_EH_RESET; |
022bdb07 | 1556 | } |
f9df58cb TH |
1557 | |
1558 | /* Determine whether a hotplug event has occurred. Both | |
1559 | * SError.N/X are considered hotplug events for enabled or | |
1560 | * host links. For disabled PMP links, only N bit is | |
1561 | * considered as X bit is left at 1 for link plugging. | |
1562 | */ | |
1563 | hotplug_mask = 0; | |
1564 | ||
1565 | if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
1566 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; | |
1567 | else | |
1568 | hotplug_mask = SERR_PHYRDY_CHG; | |
1569 | ||
1570 | if (serror & hotplug_mask) | |
084fe639 | 1571 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1572 | |
1573 | ehc->i.err_mask |= err_mask; | |
1574 | ehc->i.action |= action; | |
1575 | } | |
1576 | ||
e8ee8451 TH |
1577 | /** |
1578 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1579 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1580 | * |
1581 | * Read log page 10h, determine the offending qc and acquire | |
1582 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1583 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1584 | * care of the rest. | |
1585 | * | |
1586 | * LOCKING: | |
1587 | * Kernel thread context (may sleep). | |
1588 | */ | |
10acf3b0 | 1589 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1590 | { |
0260731f TH |
1591 | struct ata_port *ap = link->ap; |
1592 | struct ata_eh_context *ehc = &link->eh_context; | |
1593 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1594 | struct ata_queued_cmd *qc; |
1595 | struct ata_taskfile tf; | |
1596 | int tag, rc; | |
1597 | ||
1598 | /* if frozen, we can't do much */ | |
b51e9e5d | 1599 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1600 | return; |
1601 | ||
1602 | /* is it NCQ device error? */ | |
0260731f | 1603 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1604 | return; |
1605 | ||
1606 | /* has LLDD analyzed already? */ | |
1607 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1608 | qc = __ata_qc_from_tag(ap, tag); | |
1609 | ||
1610 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1611 | continue; | |
1612 | ||
1613 | if (qc->err_mask) | |
1614 | return; | |
1615 | } | |
1616 | ||
1617 | /* okay, this error is ours */ | |
1618 | rc = ata_eh_read_log_10h(dev, &tag, &tf); | |
1619 | if (rc) { | |
0260731f | 1620 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
e8ee8451 TH |
1621 | "(errno=%d)\n", rc); |
1622 | return; | |
1623 | } | |
1624 | ||
0260731f TH |
1625 | if (!(link->sactive & (1 << tag))) { |
1626 | ata_link_printk(link, KERN_ERR, "log page 10h reported " | |
e8ee8451 TH |
1627 | "inactive tag %d\n", tag); |
1628 | return; | |
1629 | } | |
1630 | ||
1631 | /* we've got the perpetrator, condemn it */ | |
1632 | qc = __ata_qc_from_tag(ap, tag); | |
1633 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1634 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1635 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
e8ee8451 TH |
1636 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1637 | } | |
1638 | ||
022bdb07 TH |
1639 | /** |
1640 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1641 | * @qc: qc to analyze | |
1642 | * @tf: Taskfile registers to analyze | |
1643 | * | |
1644 | * Analyze taskfile of @qc and further determine cause of | |
1645 | * failure. This function also requests ATAPI sense data if | |
1646 | * avaliable. | |
1647 | * | |
1648 | * LOCKING: | |
1649 | * Kernel thread context (may sleep). | |
1650 | * | |
1651 | * RETURNS: | |
1652 | * Determined recovery action | |
1653 | */ | |
1654 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1655 | const struct ata_taskfile *tf) | |
1656 | { | |
1657 | unsigned int tmp, action = 0; | |
1658 | u8 stat = tf->command, err = tf->feature; | |
1659 | ||
1660 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1661 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1662 | return ATA_EH_RESET; |
022bdb07 TH |
1663 | } |
1664 | ||
a51d644a TH |
1665 | if (stat & (ATA_ERR | ATA_DF)) |
1666 | qc->err_mask |= AC_ERR_DEV; | |
1667 | else | |
022bdb07 TH |
1668 | return 0; |
1669 | ||
1670 | switch (qc->dev->class) { | |
1671 | case ATA_DEV_ATA: | |
1672 | if (err & ATA_ICRC) | |
1673 | qc->err_mask |= AC_ERR_ATA_BUS; | |
1674 | if (err & ATA_UNC) | |
1675 | qc->err_mask |= AC_ERR_MEDIA; | |
1676 | if (err & ATA_IDNF) | |
1677 | qc->err_mask |= AC_ERR_INVALID; | |
1678 | break; | |
1679 | ||
1680 | case ATA_DEV_ATAPI: | |
a569a30d | 1681 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1682 | tmp = atapi_eh_request_sense(qc->dev, |
1683 | qc->scsicmd->sense_buffer, | |
1684 | qc->result_tf.feature >> 4); | |
a569a30d TH |
1685 | if (!tmp) { |
1686 | /* ATA_QCFLAG_SENSE_VALID is used to | |
1687 | * tell atapi_qc_complete() that sense | |
1688 | * data is already valid. | |
1689 | * | |
1690 | * TODO: interpret sense data and set | |
1691 | * appropriate err_mask. | |
1692 | */ | |
1693 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
1694 | } else | |
1695 | qc->err_mask |= tmp; | |
1696 | } | |
022bdb07 TH |
1697 | } |
1698 | ||
1699 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) | |
cf480626 | 1700 | action |= ATA_EH_RESET; |
022bdb07 TH |
1701 | |
1702 | return action; | |
1703 | } | |
1704 | ||
76326ac1 TH |
1705 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1706 | int *xfer_ok) | |
022bdb07 | 1707 | { |
76326ac1 TH |
1708 | int base = 0; |
1709 | ||
1710 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1711 | *xfer_ok = 1; | |
1712 | ||
1713 | if (!*xfer_ok) | |
75f9cafc | 1714 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1715 | |
7d47e8d4 | 1716 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1717 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1718 | |
7d47e8d4 | 1719 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1720 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1721 | |
3884f7b0 | 1722 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1723 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1724 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1725 | if ((err_mask & |
1726 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1727 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1728 | } |
1729 | ||
1730 | return 0; | |
1731 | } | |
1732 | ||
7d47e8d4 | 1733 | struct speed_down_verdict_arg { |
022bdb07 | 1734 | u64 since; |
76326ac1 | 1735 | int xfer_ok; |
3884f7b0 | 1736 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1737 | }; |
1738 | ||
7d47e8d4 | 1739 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1740 | { |
7d47e8d4 | 1741 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1742 | int cat; |
022bdb07 TH |
1743 | |
1744 | if (ent->timestamp < arg->since) | |
1745 | return -1; | |
1746 | ||
76326ac1 TH |
1747 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1748 | &arg->xfer_ok); | |
7d47e8d4 | 1749 | arg->nr_errors[cat]++; |
76326ac1 | 1750 | |
022bdb07 TH |
1751 | return 0; |
1752 | } | |
1753 | ||
1754 | /** | |
7d47e8d4 | 1755 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1756 | * @dev: Device of interest |
1757 | * | |
1758 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1759 | * whether NCQ needs to be turned off, transfer speed should be |
1760 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1761 | * |
3884f7b0 TH |
1762 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1763 | * | |
1764 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1765 | * IO commands | |
1766 | * | |
1767 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1768 | * | |
76326ac1 TH |
1769 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1770 | * data transfer hasn't been verified. | |
1771 | * | |
3884f7b0 TH |
1772 | * Verdicts are |
1773 | * | |
1774 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1775 | * |
3884f7b0 TH |
1776 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1777 | * to PIO. | |
7d47e8d4 | 1778 | * |
3884f7b0 | 1779 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1780 | * |
3884f7b0 | 1781 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1782 | * taken per error. An action triggered by non-DUBIOUS errors |
1783 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1784 | * This is to expedite speed down decisions right after device is | |
1785 | * initially configured. | |
1786 | * | |
1787 | * The followings are speed down rules. #1 and #2 deal with | |
1788 | * DUBIOUS errors. | |
7d47e8d4 | 1789 | * |
76326ac1 TH |
1790 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1791 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1792 | * | |
1793 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1794 | * occurred during last 5 mins, NCQ_OFF. | |
1795 | * | |
1796 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
3884f7b0 | 1797 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1798 | * |
76326ac1 | 1799 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1800 | * during last 10 mins, NCQ_OFF. |
1801 | * | |
76326ac1 | 1802 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1803 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1804 | * |
022bdb07 TH |
1805 | * LOCKING: |
1806 | * Inherited from caller. | |
1807 | * | |
1808 | * RETURNS: | |
7d47e8d4 | 1809 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1810 | */ |
7d47e8d4 | 1811 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1812 | { |
7d47e8d4 TH |
1813 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1814 | u64 j64 = get_jiffies_64(); | |
1815 | struct speed_down_verdict_arg arg; | |
1816 | unsigned int verdict = 0; | |
022bdb07 | 1817 | |
3884f7b0 | 1818 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1819 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1820 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1821 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1822 | |
76326ac1 TH |
1823 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1824 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1825 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1826 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1827 | ||
1828 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1829 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1830 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1831 | ||
3884f7b0 TH |
1832 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1833 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1834 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1835 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1836 | |
3884f7b0 | 1837 | /* scan past 10 mins of error history */ |
022bdb07 | 1838 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1839 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1840 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1841 | |
3884f7b0 TH |
1842 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1843 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1844 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1845 | ||
1846 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1847 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1848 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1849 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1850 | |
7d47e8d4 | 1851 | return verdict; |
022bdb07 TH |
1852 | } |
1853 | ||
1854 | /** | |
1855 | * ata_eh_speed_down - record error and speed down if necessary | |
1856 | * @dev: Failed device | |
3884f7b0 | 1857 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1858 | * @err_mask: err_mask of the error |
1859 | * | |
1860 | * Record error and examine error history to determine whether | |
1861 | * adjusting transmission speed is necessary. It also sets | |
1862 | * transmission limits appropriately if such adjustment is | |
1863 | * necessary. | |
1864 | * | |
1865 | * LOCKING: | |
1866 | * Kernel thread context (may sleep). | |
1867 | * | |
1868 | * RETURNS: | |
7d47e8d4 | 1869 | * Determined recovery action. |
022bdb07 | 1870 | */ |
3884f7b0 TH |
1871 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1872 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1873 | { |
b1c72916 | 1874 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 1875 | int xfer_ok = 0; |
7d47e8d4 TH |
1876 | unsigned int verdict; |
1877 | unsigned int action = 0; | |
1878 | ||
1879 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1880 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1881 | return 0; |
1882 | ||
1883 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1884 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1885 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1886 | |
7d47e8d4 TH |
1887 | /* turn off NCQ? */ |
1888 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1889 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1890 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1891 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
1892 | ata_dev_printk(dev, KERN_WARNING, | |
1893 | "NCQ disabled due to excessive errors\n"); | |
1894 | goto done; | |
1895 | } | |
022bdb07 | 1896 | |
7d47e8d4 TH |
1897 | /* speed down? */ |
1898 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1899 | /* speed down SATA link speed if possible */ | |
a07d499b | 1900 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 1901 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1902 | goto done; |
1903 | } | |
022bdb07 | 1904 | |
7d47e8d4 TH |
1905 | /* lower transfer mode */ |
1906 | if (dev->spdn_cnt < 2) { | |
1907 | static const int dma_dnxfer_sel[] = | |
1908 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1909 | static const int pio_dnxfer_sel[] = | |
1910 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1911 | int sel; | |
1912 | ||
1913 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1914 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1915 | else | |
1916 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1917 | ||
1918 | dev->spdn_cnt++; | |
1919 | ||
1920 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1921 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1922 | goto done; |
1923 | } | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1928 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1929 | */ |
1930 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1931 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1932 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1933 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1934 | dev->spdn_cnt = 0; | |
cf480626 | 1935 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1936 | goto done; |
1937 | } | |
1938 | } | |
022bdb07 | 1939 | |
022bdb07 | 1940 | return 0; |
7d47e8d4 TH |
1941 | done: |
1942 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1943 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1944 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1945 | return action; |
022bdb07 TH |
1946 | } |
1947 | ||
1948 | /** | |
9b1e2658 TH |
1949 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1950 | * @link: host link to perform autopsy on | |
022bdb07 | 1951 | * |
0260731f TH |
1952 | * Analyze why @link failed and determine which recovery actions |
1953 | * are needed. This function also sets more detailed AC_ERR_* | |
1954 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1955 | * |
1956 | * LOCKING: | |
1957 | * Kernel thread context (may sleep). | |
1958 | */ | |
9b1e2658 | 1959 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1960 | { |
0260731f | 1961 | struct ata_port *ap = link->ap; |
936fd732 | 1962 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 1963 | struct ata_device *dev; |
3884f7b0 TH |
1964 | unsigned int all_err_mask = 0, eflags = 0; |
1965 | int tag; | |
022bdb07 TH |
1966 | u32 serror; |
1967 | int rc; | |
1968 | ||
1969 | DPRINTK("ENTER\n"); | |
1970 | ||
1cdaf534 TH |
1971 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1972 | return; | |
1973 | ||
022bdb07 | 1974 | /* obtain and analyze SError */ |
936fd732 | 1975 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1976 | if (rc == 0) { |
1977 | ehc->i.serror |= serror; | |
0260731f | 1978 | ata_eh_analyze_serror(link); |
4e57c517 | 1979 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 1980 | /* SError read failed, force reset and probing */ |
b558eddd | 1981 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 1982 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
1983 | ehc->i.err_mask |= AC_ERR_OTHER; |
1984 | } | |
022bdb07 | 1985 | |
e8ee8451 | 1986 | /* analyze NCQ failure */ |
0260731f | 1987 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 1988 | |
022bdb07 TH |
1989 | /* any real error trumps AC_ERR_OTHER */ |
1990 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
1991 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
1992 | ||
1993 | all_err_mask |= ehc->i.err_mask; | |
1994 | ||
1995 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1996 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1997 | ||
b1c72916 TH |
1998 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
1999 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
2000 | continue; |
2001 | ||
2002 | /* inherit upper level err_mask */ | |
2003 | qc->err_mask |= ehc->i.err_mask; | |
2004 | ||
022bdb07 | 2005 | /* analyze TF */ |
4528e4da | 2006 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
2007 | |
2008 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
2009 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
2010 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
2011 | AC_ERR_INVALID); | |
2012 | ||
2013 | /* any real error trumps unknown error */ | |
2014 | if (qc->err_mask & ~AC_ERR_OTHER) | |
2015 | qc->err_mask &= ~AC_ERR_OTHER; | |
2016 | ||
2017 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 2018 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 2019 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 | 2020 | |
03faab78 TH |
2021 | /* determine whether the command is worth retrying */ |
2022 | if (!(qc->err_mask & AC_ERR_INVALID) && | |
2023 | ((qc->flags & ATA_QCFLAG_IO) || qc->err_mask != AC_ERR_DEV)) | |
2024 | qc->flags |= ATA_QCFLAG_RETRY; | |
2025 | ||
022bdb07 | 2026 | /* accumulate error info */ |
4528e4da | 2027 | ehc->i.dev = qc->dev; |
022bdb07 TH |
2028 | all_err_mask |= qc->err_mask; |
2029 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 2030 | eflags |= ATA_EFLAG_IS_IO; |
022bdb07 TH |
2031 | } |
2032 | ||
a20f33ff | 2033 | /* enforce default EH actions */ |
b51e9e5d | 2034 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 2035 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2036 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2037 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2038 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2039 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2040 | |
dfcc173d TH |
2041 | /* If we have offending qcs and the associated failed device, |
2042 | * perform per-dev EH action only on the offending device. | |
2043 | */ | |
4528e4da | 2044 | if (ehc->i.dev) { |
4528e4da TH |
2045 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2046 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2047 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2048 | } |
2049 | ||
2695e366 TH |
2050 | /* propagate timeout to host link */ |
2051 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2052 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2053 | ||
2054 | /* record error and consider speeding down */ | |
dfcc173d | 2055 | dev = ehc->i.dev; |
2695e366 TH |
2056 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2057 | ata_dev_enabled(link->device)))) | |
2058 | dev = link->device; | |
dfcc173d | 2059 | |
76326ac1 TH |
2060 | if (dev) { |
2061 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2062 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2063 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 2064 | } |
dfcc173d | 2065 | |
022bdb07 TH |
2066 | DPRINTK("EXIT\n"); |
2067 | } | |
2068 | ||
2069 | /** | |
9b1e2658 TH |
2070 | * ata_eh_autopsy - analyze error and determine recovery action |
2071 | * @ap: host port to perform autopsy on | |
2072 | * | |
2073 | * Analyze all links of @ap and determine why they failed and | |
2074 | * which recovery actions are needed. | |
2075 | * | |
2076 | * LOCKING: | |
2077 | * Kernel thread context (may sleep). | |
2078 | */ | |
fb7fd614 | 2079 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2080 | { |
2081 | struct ata_link *link; | |
2082 | ||
1eca4365 | 2083 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2084 | ata_eh_link_autopsy(link); |
2695e366 | 2085 | |
b1c72916 TH |
2086 | /* Handle the frigging slave link. Autopsy is done similarly |
2087 | * but actions and flags are transferred over to the master | |
2088 | * link and handled from there. | |
2089 | */ | |
2090 | if (ap->slave_link) { | |
2091 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2092 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2093 | ||
848e4c68 TH |
2094 | /* transfer control flags from master to slave */ |
2095 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2096 | ||
2097 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2098 | ata_eh_link_autopsy(ap->slave_link); |
2099 | ||
848e4c68 | 2100 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2101 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2102 | mehc->i.action |= sehc->i.action; | |
2103 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2104 | mehc->i.flags |= sehc->i.flags; | |
2105 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2106 | } | |
2107 | ||
2695e366 TH |
2108 | /* Autopsy of fanout ports can affect host link autopsy. |
2109 | * Perform host link autopsy last. | |
2110 | */ | |
071f44b1 | 2111 | if (sata_pmp_attached(ap)) |
2695e366 | 2112 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2113 | } |
2114 | ||
6521148c RH |
2115 | /** |
2116 | * ata_get_cmd_descript - get description for ATA command | |
2117 | * @command: ATA command code to get description for | |
2118 | * | |
2119 | * Return a textual description of the given command, or NULL if the | |
2120 | * command is not known. | |
2121 | * | |
2122 | * LOCKING: | |
2123 | * None | |
2124 | */ | |
2125 | const char *ata_get_cmd_descript(u8 command) | |
2126 | { | |
2127 | #ifdef CONFIG_ATA_VERBOSE_ERROR | |
2128 | static const struct | |
2129 | { | |
2130 | u8 command; | |
2131 | const char *text; | |
2132 | } cmd_descr[] = { | |
2133 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, | |
2134 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, | |
2135 | { ATA_CMD_STANDBY, "STANDBY" }, | |
2136 | { ATA_CMD_IDLE, "IDLE" }, | |
2137 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, | |
2138 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, | |
2139 | { ATA_CMD_NOP, "NOP" }, | |
2140 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, | |
2141 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, | |
2142 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, | |
2143 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, | |
2144 | { ATA_CMD_SERVICE, "SERVICE" }, | |
2145 | { ATA_CMD_READ, "READ DMA" }, | |
2146 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, | |
2147 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, | |
2148 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, | |
2149 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, | |
2150 | { ATA_CMD_WRITE, "WRITE DMA" }, | |
2151 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, | |
2152 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, | |
2153 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, | |
2154 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, | |
2155 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, | |
2156 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, | |
2157 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, | |
2158 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, | |
2159 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, | |
2160 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, | |
2161 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, | |
2162 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, | |
2163 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, | |
2164 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, | |
2165 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, | |
2166 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, | |
2167 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, | |
2168 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, | |
2169 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, | |
2170 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, | |
2171 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, | |
2172 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, | |
2173 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, | |
2174 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, | |
2175 | { ATA_CMD_SLEEP, "SLEEP" }, | |
2176 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, | |
2177 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, | |
2178 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, | |
2179 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, | |
2180 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, | |
2181 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, | |
2182 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, | |
2183 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, | |
2184 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, | |
2185 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, | |
2186 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, | |
2187 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, | |
2188 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, | |
2189 | { ATA_CMD_PMP_READ, "READ BUFFER" }, | |
2190 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, | |
2191 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, | |
2192 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, | |
2193 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, | |
2194 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, | |
2195 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, | |
2196 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, | |
2197 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, | |
2198 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, | |
2199 | { ATA_CMD_SMART, "SMART" }, | |
2200 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, | |
2201 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, | |
2202 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, | |
2203 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, | |
2204 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, | |
2205 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, | |
2206 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, | |
2207 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, | |
2208 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, | |
2209 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, | |
2210 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, | |
2211 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, | |
2212 | { ATA_CMD_RESTORE, "RECALIBRATE" }, | |
2213 | { 0, NULL } /* terminate list */ | |
2214 | }; | |
2215 | ||
2216 | unsigned int i; | |
2217 | for (i = 0; cmd_descr[i].text; i++) | |
2218 | if (cmd_descr[i].command == command) | |
2219 | return cmd_descr[i].text; | |
2220 | #endif | |
2221 | ||
2222 | return NULL; | |
2223 | } | |
2224 | ||
9b1e2658 TH |
2225 | /** |
2226 | * ata_eh_link_report - report error handling to user | |
0260731f | 2227 | * @link: ATA link EH is going on |
022bdb07 TH |
2228 | * |
2229 | * Report EH to user. | |
2230 | * | |
2231 | * LOCKING: | |
2232 | * None. | |
2233 | */ | |
9b1e2658 | 2234 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2235 | { |
0260731f TH |
2236 | struct ata_port *ap = link->ap; |
2237 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2238 | const char *frozen, *desc; |
a1e10f7e | 2239 | char tries_buf[6]; |
022bdb07 TH |
2240 | int tag, nr_failed = 0; |
2241 | ||
94ff3d54 TH |
2242 | if (ehc->i.flags & ATA_EHI_QUIET) |
2243 | return; | |
2244 | ||
022bdb07 TH |
2245 | desc = NULL; |
2246 | if (ehc->i.desc[0] != '\0') | |
2247 | desc = ehc->i.desc; | |
2248 | ||
2249 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2250 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2251 | ||
b1c72916 TH |
2252 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2253 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2254 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2255 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2256 | continue; |
2257 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2258 | continue; | |
2259 | ||
2260 | nr_failed++; | |
2261 | } | |
2262 | ||
2263 | if (!nr_failed && !ehc->i.err_mask) | |
2264 | return; | |
2265 | ||
2266 | frozen = ""; | |
b51e9e5d | 2267 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2268 | frozen = " frozen"; |
2269 | ||
a1e10f7e TH |
2270 | memset(tries_buf, 0, sizeof(tries_buf)); |
2271 | if (ap->eh_tries < ATA_EH_MAX_TRIES) | |
2272 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", | |
2273 | ap->eh_tries); | |
2274 | ||
022bdb07 | 2275 | if (ehc->i.dev) { |
e8ee8451 | 2276 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2277 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2278 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2279 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2280 | if (desc) |
b64bbc39 | 2281 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
022bdb07 | 2282 | } else { |
0260731f | 2283 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2284 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2285 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2286 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2287 | if (desc) |
0260731f | 2288 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
022bdb07 TH |
2289 | } |
2290 | ||
6521148c | 2291 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2292 | if (ehc->i.serror) |
da0e21d3 | 2293 | ata_link_printk(link, KERN_ERR, |
1333e194 RH |
2294 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2295 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2296 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2297 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2298 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2299 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2300 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2301 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2302 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2303 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2304 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2305 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2306 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2307 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2308 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2309 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2310 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2311 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
6521148c | 2312 | #endif |
1333e194 | 2313 | |
022bdb07 TH |
2314 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
2315 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 2316 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2317 | const u8 *cdb = qc->cdb; |
2318 | char data_buf[20] = ""; | |
2319 | char cdb_buf[70] = ""; | |
022bdb07 | 2320 | |
0260731f | 2321 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2322 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2323 | continue; |
2324 | ||
abb6a889 TH |
2325 | if (qc->dma_dir != DMA_NONE) { |
2326 | static const char *dma_str[] = { | |
2327 | [DMA_BIDIRECTIONAL] = "bidi", | |
2328 | [DMA_TO_DEVICE] = "out", | |
2329 | [DMA_FROM_DEVICE] = "in", | |
2330 | }; | |
2331 | static const char *prot_str[] = { | |
2332 | [ATA_PROT_PIO] = "pio", | |
2333 | [ATA_PROT_DMA] = "dma", | |
2334 | [ATA_PROT_NCQ] = "ncq", | |
0dc36888 TH |
2335 | [ATAPI_PROT_PIO] = "pio", |
2336 | [ATAPI_PROT_DMA] = "dma", | |
abb6a889 TH |
2337 | }; |
2338 | ||
2339 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", | |
2340 | prot_str[qc->tf.protocol], qc->nbytes, | |
2341 | dma_str[qc->dma_dir]); | |
2342 | } | |
2343 | ||
6521148c RH |
2344 | if (ata_is_atapi(qc->tf.protocol)) { |
2345 | if (qc->scsicmd) | |
2346 | scsi_print_command(qc->scsicmd); | |
2347 | else | |
2348 | snprintf(cdb_buf, sizeof(cdb_buf), | |
abb6a889 TH |
2349 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " |
2350 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", | |
2351 | cdb[0], cdb[1], cdb[2], cdb[3], | |
2352 | cdb[4], cdb[5], cdb[6], cdb[7], | |
2353 | cdb[8], cdb[9], cdb[10], cdb[11], | |
2354 | cdb[12], cdb[13], cdb[14], cdb[15]); | |
6521148c RH |
2355 | } else { |
2356 | const char *descr = ata_get_cmd_descript(cmd->command); | |
2357 | if (descr) | |
2358 | ata_dev_printk(qc->dev, KERN_ERR, | |
2359 | "failed command: %s\n", descr); | |
2360 | } | |
abb6a889 | 2361 | |
8a937581 TH |
2362 | ata_dev_printk(qc->dev, KERN_ERR, |
2363 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " | |
abb6a889 | 2364 | "tag %d%s\n %s" |
8a937581 | 2365 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2366 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2367 | cmd->command, cmd->feature, cmd->nsect, |
2368 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2369 | cmd->hob_feature, cmd->hob_nsect, | |
2370 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2371 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2372 | res->command, res->feature, res->nsect, |
2373 | res->lbal, res->lbam, res->lbah, | |
2374 | res->hob_feature, res->hob_nsect, | |
2375 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2376 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2377 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 | 2378 | |
6521148c | 2379 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2380 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
2dcb407e | 2381 | ATA_ERR)) { |
1333e194 RH |
2382 | if (res->command & ATA_BUSY) |
2383 | ata_dev_printk(qc->dev, KERN_ERR, | |
2dcb407e | 2384 | "status: { Busy }\n"); |
1333e194 RH |
2385 | else |
2386 | ata_dev_printk(qc->dev, KERN_ERR, | |
2387 | "status: { %s%s%s%s}\n", | |
2388 | res->command & ATA_DRDY ? "DRDY " : "", | |
2389 | res->command & ATA_DF ? "DF " : "", | |
2390 | res->command & ATA_DRQ ? "DRQ " : "", | |
2dcb407e | 2391 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2392 | } |
2393 | ||
2394 | if (cmd->command != ATA_CMD_PACKET && | |
2395 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | | |
2396 | ATA_ABORTED))) | |
2397 | ata_dev_printk(qc->dev, KERN_ERR, | |
2398 | "error: { %s%s%s%s}\n", | |
2399 | res->feature & ATA_ICRC ? "ICRC " : "", | |
2400 | res->feature & ATA_UNC ? "UNC " : "", | |
2401 | res->feature & ATA_IDNF ? "IDNF " : "", | |
2dcb407e | 2402 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
6521148c | 2403 | #endif |
022bdb07 TH |
2404 | } |
2405 | } | |
2406 | ||
9b1e2658 TH |
2407 | /** |
2408 | * ata_eh_report - report error handling to user | |
2409 | * @ap: ATA port to report EH about | |
2410 | * | |
2411 | * Report EH to user. | |
2412 | * | |
2413 | * LOCKING: | |
2414 | * None. | |
2415 | */ | |
fb7fd614 | 2416 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2417 | { |
2418 | struct ata_link *link; | |
2419 | ||
1eca4365 | 2420 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2421 | ata_eh_link_report(link); |
2422 | } | |
2423 | ||
cc0680a5 | 2424 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2425 | unsigned int *classes, unsigned long deadline, |
2426 | bool clear_classes) | |
d87fa38e | 2427 | { |
f58229f8 | 2428 | struct ata_device *dev; |
d87fa38e | 2429 | |
b1c72916 | 2430 | if (clear_classes) |
1eca4365 | 2431 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2432 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2433 | |
f046519f | 2434 | return reset(link, classes, deadline); |
d87fa38e TH |
2435 | } |
2436 | ||
ae791c05 | 2437 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
5dbfc9cb | 2438 | int rc, const unsigned int *classes) |
664faf09 | 2439 | { |
45db2f6c | 2440 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2441 | return 0; |
5dbfc9cb TH |
2442 | if (rc == -EAGAIN) |
2443 | return 1; | |
071f44b1 | 2444 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2445 | return 1; |
664faf09 TH |
2446 | return 0; |
2447 | } | |
2448 | ||
fb7fd614 TH |
2449 | int ata_eh_reset(struct ata_link *link, int classify, |
2450 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2451 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2452 | { |
afaa5c37 | 2453 | struct ata_port *ap = link->ap; |
b1c72916 | 2454 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2455 | struct ata_eh_context *ehc = &link->eh_context; |
705d2014 | 2456 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
664faf09 | 2457 | unsigned int *classes = ehc->classes; |
416dc9ed | 2458 | unsigned int lflags = link->flags; |
1cdaf534 | 2459 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2460 | int max_tries = 0, try = 0; |
b1c72916 | 2461 | struct ata_link *failed_link; |
f58229f8 | 2462 | struct ata_device *dev; |
416dc9ed | 2463 | unsigned long deadline, now; |
022bdb07 | 2464 | ata_reset_fn_t reset; |
afaa5c37 | 2465 | unsigned long flags; |
416dc9ed | 2466 | u32 sstatus; |
b1c72916 | 2467 | int nr_unknown, rc; |
022bdb07 | 2468 | |
932648b0 TH |
2469 | /* |
2470 | * Prepare to reset | |
2471 | */ | |
d8af0eb6 TH |
2472 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2473 | max_tries++; | |
05944bdf TH |
2474 | if (link->flags & ATA_LFLAG_NO_HRST) |
2475 | hardreset = NULL; | |
2476 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2477 | softreset = NULL; | |
d8af0eb6 | 2478 | |
19b72321 TH |
2479 | /* make sure each reset attemp is at least COOL_DOWN apart */ |
2480 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
2481 | now = jiffies; | |
2482 | WARN_ON(time_after(ehc->last_reset, now)); | |
2483 | deadline = ata_deadline(ehc->last_reset, | |
2484 | ATA_EH_RESET_COOL_DOWN); | |
2485 | if (time_before(now, deadline)) | |
2486 | schedule_timeout_uninterruptible(deadline - now); | |
2487 | } | |
0a2c0f56 | 2488 | |
afaa5c37 TH |
2489 | spin_lock_irqsave(ap->lock, flags); |
2490 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2491 | spin_unlock_irqrestore(ap->lock, flags); | |
2492 | ||
cf480626 | 2493 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2494 | |
1eca4365 | 2495 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2496 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2497 | * may change configuration and be in PIO0 timing. If | |
2498 | * we do a hard reset (or are coming from power on) | |
2499 | * this is true for ATA or ATAPI. Until we've set a | |
2500 | * suitable controller mode we should not touch the | |
2501 | * bus as we may be talking too fast. | |
2502 | */ | |
2503 | dev->pio_mode = XFER_PIO_0; | |
2504 | ||
2505 | /* If the controller has a pio mode setup function | |
2506 | * then use it to set the chipset to rights. Don't | |
2507 | * touch the DMA setup as that will be dealt with when | |
2508 | * configuring devices. | |
2509 | */ | |
2510 | if (ap->ops->set_piomode) | |
2511 | ap->ops->set_piomode(ap, dev); | |
2512 | } | |
2513 | ||
cf480626 | 2514 | /* prefer hardreset */ |
932648b0 | 2515 | reset = NULL; |
cf480626 TH |
2516 | ehc->i.action &= ~ATA_EH_RESET; |
2517 | if (hardreset) { | |
2518 | reset = hardreset; | |
a674050e | 2519 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2520 | } else if (softreset) { |
cf480626 | 2521 | reset = softreset; |
a674050e | 2522 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2523 | } |
f5914a46 TH |
2524 | |
2525 | if (prereset) { | |
b1c72916 TH |
2526 | unsigned long deadline = ata_deadline(jiffies, |
2527 | ATA_EH_PRERESET_TIMEOUT); | |
2528 | ||
2529 | if (slave) { | |
2530 | sehc->i.action &= ~ATA_EH_RESET; | |
2531 | sehc->i.action |= ehc->i.action; | |
2532 | } | |
2533 | ||
2534 | rc = prereset(link, deadline); | |
2535 | ||
2536 | /* If present, do prereset on slave link too. Reset | |
2537 | * is skipped iff both master and slave links report | |
2538 | * -ENOENT or clear ATA_EH_RESET. | |
2539 | */ | |
2540 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2541 | int tmp; | |
2542 | ||
2543 | tmp = prereset(slave, deadline); | |
2544 | if (tmp != -ENOENT) | |
2545 | rc = tmp; | |
2546 | ||
2547 | ehc->i.action |= sehc->i.action; | |
2548 | } | |
2549 | ||
f5914a46 | 2550 | if (rc) { |
c961922b | 2551 | if (rc == -ENOENT) { |
cc0680a5 | 2552 | ata_link_printk(link, KERN_DEBUG, |
4aa9ab67 | 2553 | "port disabled. ignoring.\n"); |
cf480626 | 2554 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2555 | |
1eca4365 | 2556 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2557 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2558 | |
2559 | rc = 0; | |
c961922b | 2560 | } else |
cc0680a5 | 2561 | ata_link_printk(link, KERN_ERR, |
f5914a46 | 2562 | "prereset failed (errno=%d)\n", rc); |
fccb6ea5 | 2563 | goto out; |
f5914a46 | 2564 | } |
f5914a46 | 2565 | |
932648b0 | 2566 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2567 | * bang classes, thaw and return. |
932648b0 TH |
2568 | */ |
2569 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2570 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2571 | classes[dev->devno] = ATA_DEV_NONE; |
d6515e6f TH |
2572 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
2573 | ata_is_host_link(link)) | |
2574 | ata_eh_thaw_port(ap); | |
932648b0 TH |
2575 | rc = 0; |
2576 | goto out; | |
2577 | } | |
f5914a46 TH |
2578 | } |
2579 | ||
022bdb07 | 2580 | retry: |
932648b0 TH |
2581 | /* |
2582 | * Perform reset | |
2583 | */ | |
dc98c32c TH |
2584 | if (ata_is_host_link(link)) |
2585 | ata_eh_freeze_port(ap); | |
2586 | ||
341c2c95 | 2587 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2588 | |
932648b0 TH |
2589 | if (reset) { |
2590 | if (verbose) | |
2591 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", | |
2592 | reset == softreset ? "soft" : "hard"); | |
2593 | ||
2594 | /* mark that this EH session started with reset */ | |
19b72321 | 2595 | ehc->last_reset = jiffies; |
932648b0 TH |
2596 | if (reset == hardreset) |
2597 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2598 | else | |
2599 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2600 | |
b1c72916 TH |
2601 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2602 | if (rc && rc != -EAGAIN) { | |
2603 | failed_link = link; | |
5dbfc9cb | 2604 | goto fail; |
b1c72916 TH |
2605 | } |
2606 | ||
2607 | /* hardreset slave link if existent */ | |
2608 | if (slave && reset == hardreset) { | |
2609 | int tmp; | |
2610 | ||
2611 | if (verbose) | |
2612 | ata_link_printk(slave, KERN_INFO, | |
2613 | "hard resetting link\n"); | |
2614 | ||
2615 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2616 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2617 | false); | |
2618 | switch (tmp) { | |
2619 | case -EAGAIN: | |
2620 | rc = -EAGAIN; | |
2621 | case 0: | |
2622 | break; | |
2623 | default: | |
2624 | failed_link = slave; | |
2625 | rc = tmp; | |
2626 | goto fail; | |
2627 | } | |
2628 | } | |
022bdb07 | 2629 | |
b1c72916 | 2630 | /* perform follow-up SRST if necessary */ |
932648b0 | 2631 | if (reset == hardreset && |
5dbfc9cb | 2632 | ata_eh_followup_srst_needed(link, rc, classes)) { |
932648b0 | 2633 | reset = softreset; |
022bdb07 | 2634 | |
932648b0 TH |
2635 | if (!reset) { |
2636 | ata_link_printk(link, KERN_ERR, | |
2637 | "follow-up softreset required " | |
2638 | "but no softreset avaliable\n"); | |
b1c72916 | 2639 | failed_link = link; |
932648b0 TH |
2640 | rc = -EINVAL; |
2641 | goto fail; | |
2642 | } | |
664faf09 | 2643 | |
932648b0 | 2644 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2645 | rc = ata_do_reset(link, reset, classes, deadline, true); |
fe2c4d01 TH |
2646 | if (rc) { |
2647 | failed_link = link; | |
2648 | goto fail; | |
2649 | } | |
664faf09 | 2650 | } |
932648b0 TH |
2651 | } else { |
2652 | if (verbose) | |
2653 | ata_link_printk(link, KERN_INFO, "no reset method " | |
2654 | "available, skipping reset\n"); | |
2655 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) | |
2656 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2657 | } |
2658 | ||
932648b0 TH |
2659 | /* |
2660 | * Post-reset processing | |
2661 | */ | |
1eca4365 | 2662 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2663 | /* After the reset, the device state is PIO 0 and the |
2664 | * controller state is undefined. Reset also wakes up | |
2665 | * drives from sleeping mode. | |
2666 | */ | |
2667 | dev->pio_mode = XFER_PIO_0; | |
2668 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2669 | |
3b761d3d TH |
2670 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
2671 | continue; | |
2672 | ||
2673 | /* apply class override */ | |
2674 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2675 | classes[dev->devno] = ATA_DEV_ATA; | |
2676 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2677 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
022bdb07 TH |
2678 | } |
2679 | ||
416dc9ed TH |
2680 | /* record current link speed */ |
2681 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2682 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2683 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2684 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2685 | |
dc98c32c TH |
2686 | /* thaw the port */ |
2687 | if (ata_is_host_link(link)) | |
2688 | ata_eh_thaw_port(ap); | |
2689 | ||
f046519f TH |
2690 | /* postreset() should clear hardware SError. Although SError |
2691 | * is cleared during link resume, clearing SError here is | |
2692 | * necessary as some PHYs raise hotplug events after SRST. | |
2693 | * This introduces race condition where hotplug occurs between | |
2694 | * reset and here. This race is mediated by cross checking | |
2695 | * link onlineness and classification result later. | |
2696 | */ | |
b1c72916 | 2697 | if (postreset) { |
416dc9ed | 2698 | postreset(link, classes); |
b1c72916 TH |
2699 | if (slave) |
2700 | postreset(slave, classes); | |
2701 | } | |
20952b69 | 2702 | |
1e641060 TH |
2703 | /* |
2704 | * Some controllers can't be frozen very well and may set | |
2705 | * spuruious error conditions during reset. Clear accumulated | |
2706 | * error information. As reset is the final recovery action, | |
2707 | * nothing is lost by doing this. | |
2708 | */ | |
f046519f | 2709 | spin_lock_irqsave(link->ap->lock, flags); |
1e641060 | 2710 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
b1c72916 | 2711 | if (slave) |
1e641060 TH |
2712 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
2713 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
f046519f TH |
2714 | spin_unlock_irqrestore(link->ap->lock, flags); |
2715 | ||
3b761d3d TH |
2716 | /* |
2717 | * Make sure onlineness and classification result correspond. | |
f046519f TH |
2718 | * Hotplug could have happened during reset and some |
2719 | * controllers fail to wait while a drive is spinning up after | |
2720 | * being hotplugged causing misdetection. By cross checking | |
3b761d3d TH |
2721 | * link on/offlineness and classification result, those |
2722 | * conditions can be reliably detected and retried. | |
f046519f | 2723 | */ |
b1c72916 | 2724 | nr_unknown = 0; |
1eca4365 | 2725 | ata_for_each_dev(dev, link, ALL) { |
3b761d3d TH |
2726 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
2727 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
2728 | ata_dev_printk(dev, KERN_DEBUG, "link online " | |
2729 | "but device misclassifed\n"); | |
2730 | classes[dev->devno] = ATA_DEV_NONE; | |
b1c72916 | 2731 | nr_unknown++; |
3b761d3d TH |
2732 | } |
2733 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { | |
2734 | if (ata_class_enabled(classes[dev->devno])) | |
2735 | ata_dev_printk(dev, KERN_DEBUG, "link offline, " | |
2736 | "clearing class %d to NONE\n", | |
2737 | classes[dev->devno]); | |
2738 | classes[dev->devno] = ATA_DEV_NONE; | |
2739 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
2740 | ata_dev_printk(dev, KERN_DEBUG, "link status unknown, " | |
2741 | "clearing UNKNOWN to NONE\n"); | |
2742 | classes[dev->devno] = ATA_DEV_NONE; | |
b1c72916 | 2743 | } |
f046519f TH |
2744 | } |
2745 | ||
b1c72916 | 2746 | if (classify && nr_unknown) { |
f046519f TH |
2747 | if (try < max_tries) { |
2748 | ata_link_printk(link, KERN_WARNING, "link online but " | |
3b761d3d TH |
2749 | "%d devices misclassified, retrying\n", |
2750 | nr_unknown); | |
b1c72916 | 2751 | failed_link = link; |
f046519f TH |
2752 | rc = -EAGAIN; |
2753 | goto fail; | |
2754 | } | |
2755 | ata_link_printk(link, KERN_WARNING, | |
3b761d3d TH |
2756 | "link online but %d devices misclassified, " |
2757 | "device detection might fail\n", nr_unknown); | |
f046519f TH |
2758 | } |
2759 | ||
416dc9ed | 2760 | /* reset successful, schedule revalidation */ |
cf480626 | 2761 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2762 | if (slave) |
2763 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
19b72321 | 2764 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2765 | ehc->i.action |= ATA_EH_REVALIDATE; |
ae791c05 | 2766 | |
416dc9ed | 2767 | rc = 0; |
fccb6ea5 TH |
2768 | out: |
2769 | /* clear hotplug flag */ | |
2770 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2771 | if (slave) |
2772 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2773 | |
2774 | spin_lock_irqsave(ap->lock, flags); | |
2775 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2776 | spin_unlock_irqrestore(ap->lock, flags); | |
2777 | ||
022bdb07 | 2778 | return rc; |
416dc9ed TH |
2779 | |
2780 | fail: | |
5958e302 TH |
2781 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2782 | if (!ata_is_host_link(link) && | |
2783 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2784 | rc = -ERESTART; | |
2785 | ||
416dc9ed TH |
2786 | if (rc == -ERESTART || try >= max_tries) |
2787 | goto out; | |
2788 | ||
2789 | now = jiffies; | |
2790 | if (time_before(now, deadline)) { | |
2791 | unsigned long delta = deadline - now; | |
2792 | ||
b1c72916 | 2793 | ata_link_printk(failed_link, KERN_WARNING, |
0a2c0f56 TH |
2794 | "reset failed (errno=%d), retrying in %u secs\n", |
2795 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed TH |
2796 | |
2797 | while (delta) | |
2798 | delta = schedule_timeout_uninterruptible(delta); | |
2799 | } | |
2800 | ||
b1c72916 | 2801 | if (try == max_tries - 1) { |
a07d499b | 2802 | sata_down_spd_limit(link, 0); |
b1c72916 | 2803 | if (slave) |
a07d499b | 2804 | sata_down_spd_limit(slave, 0); |
b1c72916 | 2805 | } else if (rc == -EPIPE) |
a07d499b | 2806 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 2807 | |
416dc9ed TH |
2808 | if (hardreset) |
2809 | reset = hardreset; | |
2810 | goto retry; | |
022bdb07 TH |
2811 | } |
2812 | ||
45fabbb7 EO |
2813 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
2814 | { | |
2815 | struct ata_link *link; | |
2816 | struct ata_device *dev; | |
2817 | unsigned long flags; | |
2818 | ||
2819 | /* | |
2820 | * This function can be thought of as an extended version of | |
2821 | * ata_eh_about_to_do() specially crafted to accommodate the | |
2822 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
2823 | * does not leave the do {} while () loop in ata_eh_recover as | |
2824 | * long as the timeout for a park request to *one* device on | |
2825 | * the port has not expired, and since we still want to pick | |
2826 | * up park requests to other devices on the same port or | |
2827 | * timeout updates for the same device, we have to pull | |
2828 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
2829 | * ourselves at the beginning of each pass over the loop. | |
2830 | * | |
2831 | * Additionally, all write accesses to &ap->park_req_pending | |
2832 | * through INIT_COMPLETION() (see below) or complete_all() | |
2833 | * (see ata_scsi_park_store()) are protected by the host lock. | |
2834 | * As a result we have that park_req_pending.done is zero on | |
2835 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
2836 | * *all* devices on port ap have been pulled into the | |
2837 | * respective eh_context structs. If, and only if, | |
2838 | * park_req_pending.done is non-zero by the time we reach | |
2839 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
2840 | * has been scheduled for at least one of the devices on port | |
2841 | * ap and we have to cycle over the do {} while () loop in | |
2842 | * ata_eh_recover() again. | |
2843 | */ | |
2844 | ||
2845 | spin_lock_irqsave(ap->lock, flags); | |
2846 | INIT_COMPLETION(ap->park_req_pending); | |
1eca4365 TH |
2847 | ata_for_each_link(link, ap, EDGE) { |
2848 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
2849 | struct ata_eh_info *ehi = &link->eh_info; |
2850 | ||
2851 | link->eh_context.i.dev_action[dev->devno] |= | |
2852 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
2853 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
2854 | } | |
2855 | } | |
2856 | spin_unlock_irqrestore(ap->lock, flags); | |
2857 | } | |
2858 | ||
2859 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
2860 | { | |
2861 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2862 | struct ata_taskfile tf; | |
2863 | unsigned int err_mask; | |
2864 | ||
2865 | ata_tf_init(dev, &tf); | |
2866 | if (park) { | |
2867 | ehc->unloaded_mask |= 1 << dev->devno; | |
2868 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
2869 | tf.feature = 0x44; | |
2870 | tf.lbal = 0x4c; | |
2871 | tf.lbam = 0x4e; | |
2872 | tf.lbah = 0x55; | |
2873 | } else { | |
2874 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2875 | tf.command = ATA_CMD_CHK_POWER; | |
2876 | } | |
2877 | ||
2878 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
2879 | tf.protocol |= ATA_PROT_NODATA; | |
2880 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
2881 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
2882 | ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); | |
2883 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2884 | } | |
2885 | } | |
2886 | ||
0260731f | 2887 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2888 | struct ata_device **r_failed_dev) |
022bdb07 | 2889 | { |
0260731f TH |
2890 | struct ata_port *ap = link->ap; |
2891 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2892 | struct ata_device *dev; |
8c3c52a8 | 2893 | unsigned int new_mask = 0; |
084fe639 | 2894 | unsigned long flags; |
f58229f8 | 2895 | int rc = 0; |
022bdb07 TH |
2896 | |
2897 | DPRINTK("ENTER\n"); | |
2898 | ||
8c3c52a8 TH |
2899 | /* For PATA drive side cable detection to work, IDENTIFY must |
2900 | * be done backwards such that PDIAG- is released by the slave | |
2901 | * device before the master device is identified. | |
2902 | */ | |
1eca4365 | 2903 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
2904 | unsigned int action = ata_eh_dev_action(dev); |
2905 | unsigned int readid_flags = 0; | |
022bdb07 | 2906 | |
bff04647 TH |
2907 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2908 | readid_flags |= ATA_READID_POSTRESET; | |
2909 | ||
9666f400 | 2910 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2911 | WARN_ON(dev->class == ATA_DEV_PMP); |
2912 | ||
b1c72916 | 2913 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 2914 | rc = -EIO; |
8c3c52a8 | 2915 | goto err; |
022bdb07 TH |
2916 | } |
2917 | ||
0260731f | 2918 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2919 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2920 | readid_flags); | |
022bdb07 | 2921 | if (rc) |
8c3c52a8 | 2922 | goto err; |
022bdb07 | 2923 | |
0260731f | 2924 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2925 | |
baa1e78a TH |
2926 | /* Configuration may have changed, reconfigure |
2927 | * transfer mode. | |
2928 | */ | |
2929 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2930 | ||
3057ac3c | 2931 | /* schedule the scsi_rescan_device() here */ |
2932 | queue_work(ata_aux_wq, &(ap->scsi_rescan_task)); | |
084fe639 TH |
2933 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2934 | ehc->tries[dev->devno] && | |
2935 | ata_class_enabled(ehc->classes[dev->devno])) { | |
842faa6c TH |
2936 | /* Temporarily set dev->class, it will be |
2937 | * permanently set once all configurations are | |
2938 | * complete. This is necessary because new | |
2939 | * device configuration is done in two | |
2940 | * separate loops. | |
2941 | */ | |
084fe639 TH |
2942 | dev->class = ehc->classes[dev->devno]; |
2943 | ||
633273a3 TH |
2944 | if (dev->class == ATA_DEV_PMP) |
2945 | rc = sata_pmp_attach(dev); | |
2946 | else | |
2947 | rc = ata_dev_read_id(dev, &dev->class, | |
2948 | readid_flags, dev->id); | |
842faa6c TH |
2949 | |
2950 | /* read_id might have changed class, store and reset */ | |
2951 | ehc->classes[dev->devno] = dev->class; | |
2952 | dev->class = ATA_DEV_UNKNOWN; | |
2953 | ||
8c3c52a8 TH |
2954 | switch (rc) { |
2955 | case 0: | |
99cf610a TH |
2956 | /* clear error info accumulated during probe */ |
2957 | ata_ering_clear(&dev->ering); | |
f58229f8 | 2958 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2959 | break; |
2960 | case -ENOENT: | |
55a8e2c8 TH |
2961 | /* IDENTIFY was issued to non-existent |
2962 | * device. No need to reset. Just | |
842faa6c | 2963 | * thaw and ignore the device. |
55a8e2c8 TH |
2964 | */ |
2965 | ata_eh_thaw_port(ap); | |
084fe639 | 2966 | break; |
8c3c52a8 | 2967 | default: |
8c3c52a8 | 2968 | goto err; |
084fe639 | 2969 | } |
8c3c52a8 TH |
2970 | } |
2971 | } | |
084fe639 | 2972 | |
c1c4e8d5 | 2973 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
2974 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
2975 | if (ap->ops->cable_detect) | |
2976 | ap->cbl = ap->ops->cable_detect(ap); | |
2977 | ata_force_cbl(ap); | |
2978 | } | |
c1c4e8d5 | 2979 | |
8c3c52a8 TH |
2980 | /* Configure new devices forward such that user doesn't see |
2981 | * device detection messages backwards. | |
2982 | */ | |
1eca4365 | 2983 | ata_for_each_dev(dev, link, ALL) { |
633273a3 TH |
2984 | if (!(new_mask & (1 << dev->devno)) || |
2985 | dev->class == ATA_DEV_PMP) | |
8c3c52a8 TH |
2986 | continue; |
2987 | ||
842faa6c TH |
2988 | dev->class = ehc->classes[dev->devno]; |
2989 | ||
8c3c52a8 TH |
2990 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
2991 | rc = ata_dev_configure(dev); | |
2992 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
842faa6c TH |
2993 | if (rc) { |
2994 | dev->class = ATA_DEV_UNKNOWN; | |
8c3c52a8 | 2995 | goto err; |
842faa6c | 2996 | } |
8c3c52a8 TH |
2997 | |
2998 | spin_lock_irqsave(ap->lock, flags); | |
2999 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
3000 | spin_unlock_irqrestore(ap->lock, flags); | |
3001 | ||
3002 | /* new device discovered, configure xfermode */ | |
3003 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
3004 | } |
3005 | ||
8c3c52a8 | 3006 | return 0; |
022bdb07 | 3007 | |
8c3c52a8 TH |
3008 | err: |
3009 | *r_failed_dev = dev; | |
3010 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
3011 | return rc; |
3012 | } | |
3013 | ||
6f1d1e3a TH |
3014 | /** |
3015 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
3016 | * @link: link on which timings will be programmed | |
98a1708d | 3017 | * @r_failed_dev: out parameter for failed device |
6f1d1e3a TH |
3018 | * |
3019 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3020 | * ata_set_mode() fails, pointer to the failing device is | |
3021 | * returned in @r_failed_dev. | |
3022 | * | |
3023 | * LOCKING: | |
3024 | * PCI/etc. bus probe sem. | |
3025 | * | |
3026 | * RETURNS: | |
3027 | * 0 on success, negative errno otherwise | |
3028 | */ | |
3029 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
3030 | { | |
3031 | struct ata_port *ap = link->ap; | |
00115e0f TH |
3032 | struct ata_device *dev; |
3033 | int rc; | |
6f1d1e3a | 3034 | |
76326ac1 | 3035 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 3036 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
3037 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
3038 | struct ata_ering_entry *ent; | |
3039 | ||
3040 | ent = ata_ering_top(&dev->ering); | |
3041 | if (ent) | |
3042 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
3043 | } | |
3044 | } | |
3045 | ||
6f1d1e3a TH |
3046 | /* has private set_mode? */ |
3047 | if (ap->ops->set_mode) | |
00115e0f TH |
3048 | rc = ap->ops->set_mode(link, r_failed_dev); |
3049 | else | |
3050 | rc = ata_do_set_mode(link, r_failed_dev); | |
3051 | ||
3052 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 3053 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
3054 | struct ata_eh_context *ehc = &link->eh_context; |
3055 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
3056 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
3057 | ||
3058 | if (dev->xfer_mode != saved_xfer_mode || | |
3059 | ata_ncq_enabled(dev) != saved_ncq) | |
3060 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
3061 | } | |
3062 | ||
3063 | return rc; | |
6f1d1e3a TH |
3064 | } |
3065 | ||
11fc33da TH |
3066 | /** |
3067 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
3068 | * @dev: ATAPI device to clear UA for | |
3069 | * | |
3070 | * Resets and other operations can make an ATAPI device raise | |
3071 | * UNIT ATTENTION which causes the next operation to fail. This | |
3072 | * function clears UA. | |
3073 | * | |
3074 | * LOCKING: | |
3075 | * EH context (may sleep). | |
3076 | * | |
3077 | * RETURNS: | |
3078 | * 0 on success, -errno on failure. | |
3079 | */ | |
3080 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
3081 | { | |
3082 | int i; | |
3083 | ||
3084 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 3085 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
3086 | u8 sense_key = 0; |
3087 | unsigned int err_mask; | |
3088 | ||
3089 | err_mask = atapi_eh_tur(dev, &sense_key); | |
3090 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
3091 | ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " | |
3092 | "failed (err_mask=0x%x)\n", err_mask); | |
3093 | return -EIO; | |
3094 | } | |
3095 | ||
3096 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
3097 | return 0; | |
3098 | ||
3099 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
3100 | if (err_mask) { | |
3101 | ata_dev_printk(dev, KERN_WARNING, "failed to clear " | |
3102 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); | |
3103 | return -EIO; | |
3104 | } | |
3105 | } | |
3106 | ||
3107 | ata_dev_printk(dev, KERN_WARNING, | |
3108 | "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); | |
3109 | ||
3110 | return 0; | |
3111 | } | |
3112 | ||
0260731f | 3113 | static int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 3114 | { |
f58229f8 TH |
3115 | struct ata_device *dev; |
3116 | int cnt = 0; | |
022bdb07 | 3117 | |
1eca4365 TH |
3118 | ata_for_each_dev(dev, link, ENABLED) |
3119 | cnt++; | |
022bdb07 TH |
3120 | return cnt; |
3121 | } | |
3122 | ||
0260731f | 3123 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 3124 | { |
f58229f8 TH |
3125 | struct ata_device *dev; |
3126 | int cnt = 0; | |
084fe639 | 3127 | |
1eca4365 | 3128 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 3129 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
3130 | cnt++; |
3131 | return cnt; | |
3132 | } | |
3133 | ||
0260731f | 3134 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 3135 | { |
672b2d65 | 3136 | struct ata_port *ap = link->ap; |
0260731f | 3137 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 3138 | struct ata_device *dev; |
084fe639 | 3139 | |
f9df58cb TH |
3140 | /* skip disabled links */ |
3141 | if (link->flags & ATA_LFLAG_DISABLED) | |
3142 | return 1; | |
3143 | ||
672b2d65 TH |
3144 | /* thaw frozen port and recover failed devices */ |
3145 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
3146 | return 0; | |
3147 | ||
3148 | /* reset at least once if reset is requested */ | |
3149 | if ((ehc->i.action & ATA_EH_RESET) && | |
3150 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
3151 | return 0; |
3152 | ||
3153 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 3154 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
3155 | if (dev->class == ATA_DEV_UNKNOWN && |
3156 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
3157 | return 0; | |
3158 | } | |
3159 | ||
3160 | return 1; | |
3161 | } | |
3162 | ||
c2c7a89c TH |
3163 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
3164 | { | |
3165 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
3166 | u64 now = get_jiffies_64(); | |
3167 | int *trials = void_arg; | |
3168 | ||
3169 | if (ent->timestamp < now - min(now, interval)) | |
3170 | return -1; | |
3171 | ||
3172 | (*trials)++; | |
3173 | return 0; | |
3174 | } | |
3175 | ||
02c05a27 TH |
3176 | static int ata_eh_schedule_probe(struct ata_device *dev) |
3177 | { | |
3178 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3179 | struct ata_link *link = ata_dev_phys_link(dev); |
3180 | int trials = 0; | |
02c05a27 TH |
3181 | |
3182 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3183 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3184 | return 0; | |
3185 | ||
3186 | ata_eh_detach_dev(dev); | |
3187 | ata_dev_init(dev); | |
3188 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3189 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3190 | ehc->saved_xfer_mode[dev->devno] = 0; |
3191 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3192 | |
c2c7a89c TH |
3193 | /* Record and count probe trials on the ering. The specific |
3194 | * error mask used is irrelevant. Because a successful device | |
3195 | * detection clears the ering, this count accumulates only if | |
3196 | * there are consecutive failed probes. | |
3197 | * | |
3198 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3199 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3200 | * forced to 1.5Gbps. | |
3201 | * | |
3202 | * This is to work around cases where failed link speed | |
3203 | * negotiation results in device misdetection leading to | |
3204 | * infinite DEVXCHG or PHRDY CHG events. | |
3205 | */ | |
3206 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3207 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3208 | ||
3209 | if (trials > ATA_EH_PROBE_TRIALS) | |
3210 | sata_down_spd_limit(link, 1); | |
3211 | ||
02c05a27 TH |
3212 | return 1; |
3213 | } | |
3214 | ||
9b1e2658 | 3215 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3216 | { |
9af5c9c9 | 3217 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3218 | |
cf9a590a TH |
3219 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3220 | * The requester is responsible for ensuring forward progress. | |
3221 | */ | |
3222 | if (err != -EAGAIN) | |
3223 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3224 | |
3225 | switch (err) { | |
3226 | case -ENODEV: | |
3227 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3228 | ehc->i.probe_mask |= (1 << dev->devno); | |
3229 | case -EINVAL: | |
3230 | /* give it just one more chance */ | |
3231 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
3232 | case -EIO: | |
d89293ab | 3233 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3234 | /* This is the last chance, better to slow |
3235 | * down than lose it. | |
3236 | */ | |
a07d499b | 3237 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3238 | if (dev->pio_mode > XFER_PIO_0) |
3239 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3240 | } |
3241 | } | |
3242 | ||
3243 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3244 | /* disable device if it has used up all its chances */ | |
3245 | ata_dev_disable(dev); | |
3246 | ||
3247 | /* detach if offline */ | |
b1c72916 | 3248 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3249 | ata_eh_detach_dev(dev); |
3250 | ||
02c05a27 | 3251 | /* schedule probe if necessary */ |
87fbc5a0 | 3252 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3253 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3254 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3255 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3256 | } | |
9b1e2658 TH |
3257 | |
3258 | return 1; | |
fee7ca72 | 3259 | } else { |
cf480626 | 3260 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3261 | return 0; |
fee7ca72 TH |
3262 | } |
3263 | } | |
3264 | ||
022bdb07 TH |
3265 | /** |
3266 | * ata_eh_recover - recover host port after error | |
3267 | * @ap: host port to recover | |
f5914a46 | 3268 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3269 | * @softreset: softreset method (can be NULL) |
3270 | * @hardreset: hardreset method (can be NULL) | |
3271 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3272 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3273 | * |
3274 | * This is the alpha and omega, eum and yang, heart and soul of | |
3275 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3276 | * recover each link and hotplug requests are recorded in the |
3277 | * link's eh_context. This function executes all the operations | |
3278 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3279 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3280 | * |
3281 | * LOCKING: | |
3282 | * Kernel thread context (may sleep). | |
3283 | * | |
3284 | * RETURNS: | |
3285 | * 0 on success, -errno on failure. | |
3286 | */ | |
fb7fd614 TH |
3287 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3288 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3289 | ata_postreset_fn_t postreset, | |
3290 | struct ata_link **r_failed_link) | |
022bdb07 | 3291 | { |
9b1e2658 | 3292 | struct ata_link *link; |
022bdb07 | 3293 | struct ata_device *dev; |
0a2c0f56 | 3294 | int nr_failed_devs; |
dc98c32c | 3295 | int rc; |
45fabbb7 | 3296 | unsigned long flags, deadline; |
022bdb07 TH |
3297 | |
3298 | DPRINTK("ENTER\n"); | |
3299 | ||
3300 | /* prep for recovery */ | |
1eca4365 | 3301 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3302 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3303 | |
f9df58cb TH |
3304 | /* re-enable link? */ |
3305 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3306 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3307 | spin_lock_irqsave(ap->lock, flags); | |
3308 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3309 | spin_unlock_irqrestore(ap->lock, flags); | |
3310 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3311 | } | |
3312 | ||
1eca4365 | 3313 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3314 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3315 | ehc->tries[dev->devno] = 1; | |
3316 | else | |
3317 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3318 | |
9b1e2658 TH |
3319 | /* collect port action mask recorded in dev actions */ |
3320 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3321 | ~ATA_EH_PERDEV_MASK; | |
3322 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3323 | ||
3324 | /* process hotplug request */ | |
3325 | if (dev->flags & ATA_DFLAG_DETACH) | |
3326 | ata_eh_detach_dev(dev); | |
3327 | ||
02c05a27 TH |
3328 | /* schedule probe if necessary */ |
3329 | if (!ata_dev_enabled(dev)) | |
3330 | ata_eh_schedule_probe(dev); | |
084fe639 | 3331 | } |
022bdb07 TH |
3332 | } |
3333 | ||
3334 | retry: | |
022bdb07 | 3335 | rc = 0; |
9b1e2658 | 3336 | nr_failed_devs = 0; |
022bdb07 | 3337 | |
aeb2ecd6 | 3338 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3339 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3340 | goto out; |
3341 | ||
9b1e2658 | 3342 | /* prep for EH */ |
1eca4365 | 3343 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3344 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3345 | |
9b1e2658 TH |
3346 | /* skip EH if possible. */ |
3347 | if (ata_eh_skip_recovery(link)) | |
3348 | ehc->i.action = 0; | |
3349 | ||
1eca4365 | 3350 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3351 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3352 | } | |
084fe639 | 3353 | |
022bdb07 | 3354 | /* reset */ |
1eca4365 | 3355 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3356 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3357 | |
dc98c32c TH |
3358 | if (!(ehc->i.action & ATA_EH_RESET)) |
3359 | continue; | |
9b1e2658 | 3360 | |
dc98c32c TH |
3361 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3362 | prereset, softreset, hardreset, postreset); | |
3363 | if (rc) { | |
3364 | ata_link_printk(link, KERN_ERR, | |
3365 | "reset failed, giving up\n"); | |
3366 | goto out; | |
022bdb07 | 3367 | } |
022bdb07 TH |
3368 | } |
3369 | ||
45fabbb7 EO |
3370 | do { |
3371 | unsigned long now; | |
3372 | ||
3373 | /* | |
3374 | * clears ATA_EH_PARK in eh_info and resets | |
3375 | * ap->park_req_pending | |
3376 | */ | |
3377 | ata_eh_pull_park_action(ap); | |
3378 | ||
3379 | deadline = jiffies; | |
1eca4365 TH |
3380 | ata_for_each_link(link, ap, EDGE) { |
3381 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3382 | struct ata_eh_context *ehc = &link->eh_context; |
3383 | unsigned long tmp; | |
3384 | ||
3385 | if (dev->class != ATA_DEV_ATA) | |
3386 | continue; | |
3387 | if (!(ehc->i.dev_action[dev->devno] & | |
3388 | ATA_EH_PARK)) | |
3389 | continue; | |
3390 | tmp = dev->unpark_deadline; | |
3391 | if (time_before(deadline, tmp)) | |
3392 | deadline = tmp; | |
3393 | else if (time_before_eq(tmp, jiffies)) | |
3394 | continue; | |
3395 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3396 | continue; | |
3397 | ||
3398 | ata_eh_park_issue_cmd(dev, 1); | |
3399 | } | |
3400 | } | |
3401 | ||
3402 | now = jiffies; | |
3403 | if (time_before_eq(deadline, now)) | |
3404 | break; | |
3405 | ||
3406 | deadline = wait_for_completion_timeout(&ap->park_req_pending, | |
3407 | deadline - now); | |
3408 | } while (deadline); | |
1eca4365 TH |
3409 | ata_for_each_link(link, ap, EDGE) { |
3410 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3411 | if (!(link->eh_context.unloaded_mask & |
3412 | (1 << dev->devno))) | |
3413 | continue; | |
3414 | ||
3415 | ata_eh_park_issue_cmd(dev, 0); | |
3416 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3417 | } | |
3418 | } | |
3419 | ||
9b1e2658 | 3420 | /* the rest */ |
1eca4365 | 3421 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3422 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3423 | |
9b1e2658 TH |
3424 | /* revalidate existing devices and attach new ones */ |
3425 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3426 | if (rc) |
022bdb07 | 3427 | goto dev_fail; |
022bdb07 | 3428 | |
633273a3 TH |
3429 | /* if PMP got attached, return, pmp EH will take care of it */ |
3430 | if (link->device->class == ATA_DEV_PMP) { | |
3431 | ehc->i.action = 0; | |
3432 | return 0; | |
3433 | } | |
3434 | ||
9b1e2658 TH |
3435 | /* configure transfer mode if necessary */ |
3436 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3437 | rc = ata_set_mode(link, &dev); | |
3438 | if (rc) | |
3439 | goto dev_fail; | |
3440 | ehc->i.flags &= ~ATA_EHI_SETMODE; | |
3441 | } | |
3442 | ||
11fc33da TH |
3443 | /* If reset has been issued, clear UA to avoid |
3444 | * disrupting the current users of the device. | |
3445 | */ | |
3446 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3447 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3448 | if (dev->class != ATA_DEV_ATAPI) |
3449 | continue; | |
3450 | rc = atapi_eh_clear_ua(dev); | |
3451 | if (rc) | |
3452 | goto dev_fail; | |
3453 | } | |
3454 | } | |
3455 | ||
3456 | /* configure link power saving */ | |
3ec25ebd | 3457 | if (ehc->i.action & ATA_EH_LPM) |
1eca4365 | 3458 | ata_for_each_dev(dev, link, ALL) |
ca77329f KCA |
3459 | ata_dev_enable_pm(dev, ap->pm_policy); |
3460 | ||
9b1e2658 TH |
3461 | /* this link is okay now */ |
3462 | ehc->i.flags = 0; | |
3463 | continue; | |
022bdb07 | 3464 | |
2dcb407e | 3465 | dev_fail: |
9b1e2658 | 3466 | nr_failed_devs++; |
0a2c0f56 | 3467 | ata_eh_handle_dev_fail(dev, rc); |
022bdb07 | 3468 | |
b06ce3e5 TH |
3469 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3470 | /* PMP reset requires working host port. | |
3471 | * Can't retry if it's frozen. | |
3472 | */ | |
071f44b1 | 3473 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3474 | goto out; |
9b1e2658 | 3475 | break; |
b06ce3e5 | 3476 | } |
022bdb07 TH |
3477 | } |
3478 | ||
0a2c0f56 | 3479 | if (nr_failed_devs) |
9b1e2658 | 3480 | goto retry; |
022bdb07 | 3481 | |
9b1e2658 TH |
3482 | out: |
3483 | if (rc && r_failed_link) | |
3484 | *r_failed_link = link; | |
3485 | ||
022bdb07 TH |
3486 | DPRINTK("EXIT, rc=%d\n", rc); |
3487 | return rc; | |
3488 | } | |
3489 | ||
3490 | /** | |
3491 | * ata_eh_finish - finish up EH | |
3492 | * @ap: host port to finish EH for | |
3493 | * | |
3494 | * Recovery is complete. Clean up EH states and retry or finish | |
3495 | * failed qcs. | |
3496 | * | |
3497 | * LOCKING: | |
3498 | * None. | |
3499 | */ | |
fb7fd614 | 3500 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
3501 | { |
3502 | int tag; | |
3503 | ||
3504 | /* retry or finish qcs */ | |
3505 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
3506 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
3507 | ||
3508 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
3509 | continue; | |
3510 | ||
3511 | if (qc->err_mask) { | |
3512 | /* FIXME: Once EH migration is complete, | |
3513 | * generate sense data in this function, | |
3514 | * considering both err_mask and tf. | |
3515 | */ | |
03faab78 | 3516 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3517 | ata_eh_qc_retry(qc); |
03faab78 TH |
3518 | else |
3519 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3520 | } else { |
3521 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3522 | ata_eh_qc_complete(qc); | |
3523 | } else { | |
3524 | /* feed zero TF to sense generation */ | |
3525 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3526 | ata_eh_qc_retry(qc); | |
3527 | } | |
3528 | } | |
3529 | } | |
da917d69 TH |
3530 | |
3531 | /* make sure nr_active_links is zero after EH */ | |
3532 | WARN_ON(ap->nr_active_links); | |
3533 | ap->nr_active_links = 0; | |
022bdb07 TH |
3534 | } |
3535 | ||
3536 | /** | |
3537 | * ata_do_eh - do standard error handling | |
3538 | * @ap: host port to handle error for | |
a1efdaba | 3539 | * |
f5914a46 | 3540 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3541 | * @softreset: softreset method (can be NULL) |
3542 | * @hardreset: hardreset method (can be NULL) | |
3543 | * @postreset: postreset method (can be NULL) | |
3544 | * | |
3545 | * Perform standard error handling sequence. | |
3546 | * | |
3547 | * LOCKING: | |
3548 | * Kernel thread context (may sleep). | |
3549 | */ | |
f5914a46 TH |
3550 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3551 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3552 | ata_postreset_fn_t postreset) | |
022bdb07 | 3553 | { |
9b1e2658 TH |
3554 | struct ata_device *dev; |
3555 | int rc; | |
3556 | ||
3557 | ata_eh_autopsy(ap); | |
3558 | ata_eh_report(ap); | |
3559 | ||
3560 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3561 | NULL); | |
3562 | if (rc) { | |
1eca4365 | 3563 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
3564 | ata_dev_disable(dev); |
3565 | } | |
3566 | ||
022bdb07 TH |
3567 | ata_eh_finish(ap); |
3568 | } | |
500530f6 | 3569 | |
a1efdaba TH |
3570 | /** |
3571 | * ata_std_error_handler - standard error handler | |
3572 | * @ap: host port to handle error for | |
3573 | * | |
3574 | * Standard error handler | |
3575 | * | |
3576 | * LOCKING: | |
3577 | * Kernel thread context (may sleep). | |
3578 | */ | |
3579 | void ata_std_error_handler(struct ata_port *ap) | |
3580 | { | |
3581 | struct ata_port_operations *ops = ap->ops; | |
3582 | ata_reset_fn_t hardreset = ops->hardreset; | |
3583 | ||
57c9efdf TH |
3584 | /* ignore built-in hardreset if SCR access is not available */ |
3585 | if (ata_is_builtin_hardreset(hardreset) && !sata_scr_valid(&ap->link)) | |
a1efdaba TH |
3586 | hardreset = NULL; |
3587 | ||
3588 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
3589 | } | |
3590 | ||
6ffa01d8 | 3591 | #ifdef CONFIG_PM |
500530f6 TH |
3592 | /** |
3593 | * ata_eh_handle_port_suspend - perform port suspend operation | |
3594 | * @ap: port to suspend | |
3595 | * | |
3596 | * Suspend @ap. | |
3597 | * | |
3598 | * LOCKING: | |
3599 | * Kernel thread context (may sleep). | |
3600 | */ | |
3601 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
3602 | { | |
3603 | unsigned long flags; | |
3604 | int rc = 0; | |
3605 | ||
3606 | /* are we suspending? */ | |
3607 | spin_lock_irqsave(ap->lock, flags); | |
3608 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3609 | ap->pm_mesg.event == PM_EVENT_ON) { | |
3610 | spin_unlock_irqrestore(ap->lock, flags); | |
3611 | return; | |
3612 | } | |
3613 | spin_unlock_irqrestore(ap->lock, flags); | |
3614 | ||
3615 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
3616 | ||
64578a3d TH |
3617 | /* tell ACPI we're suspending */ |
3618 | rc = ata_acpi_on_suspend(ap); | |
3619 | if (rc) | |
3620 | goto out; | |
3621 | ||
500530f6 TH |
3622 | /* suspend */ |
3623 | ata_eh_freeze_port(ap); | |
3624 | ||
3625 | if (ap->ops->port_suspend) | |
3626 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
3627 | ||
bd3adca5 | 3628 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
64578a3d | 3629 | out: |
500530f6 TH |
3630 | /* report result */ |
3631 | spin_lock_irqsave(ap->lock, flags); | |
3632 | ||
3633 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
3634 | if (rc == 0) | |
3635 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 3636 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
3637 | ata_port_schedule_eh(ap); |
3638 | ||
3639 | if (ap->pm_result) { | |
3640 | *ap->pm_result = rc; | |
3641 | ap->pm_result = NULL; | |
3642 | } | |
3643 | ||
3644 | spin_unlock_irqrestore(ap->lock, flags); | |
3645 | ||
3646 | return; | |
3647 | } | |
3648 | ||
3649 | /** | |
3650 | * ata_eh_handle_port_resume - perform port resume operation | |
3651 | * @ap: port to resume | |
3652 | * | |
3653 | * Resume @ap. | |
3654 | * | |
500530f6 TH |
3655 | * LOCKING: |
3656 | * Kernel thread context (may sleep). | |
3657 | */ | |
3658 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
3659 | { | |
6f9c1ea2 TH |
3660 | struct ata_link *link; |
3661 | struct ata_device *dev; | |
500530f6 | 3662 | unsigned long flags; |
9666f400 | 3663 | int rc = 0; |
500530f6 TH |
3664 | |
3665 | /* are we resuming? */ | |
3666 | spin_lock_irqsave(ap->lock, flags); | |
3667 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3668 | ap->pm_mesg.event != PM_EVENT_ON) { | |
3669 | spin_unlock_irqrestore(ap->lock, flags); | |
3670 | return; | |
3671 | } | |
3672 | spin_unlock_irqrestore(ap->lock, flags); | |
3673 | ||
9666f400 | 3674 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 3675 | |
6f9c1ea2 TH |
3676 | /* |
3677 | * Error timestamps are in jiffies which doesn't run while | |
3678 | * suspended and PHY events during resume isn't too uncommon. | |
3679 | * When the two are combined, it can lead to unnecessary speed | |
3680 | * downs if the machine is suspended and resumed repeatedly. | |
3681 | * Clear error history. | |
3682 | */ | |
3683 | ata_for_each_link(link, ap, HOST_FIRST) | |
3684 | ata_for_each_dev(dev, link, ALL) | |
3685 | ata_ering_clear(&dev->ering); | |
3686 | ||
bd3adca5 SL |
3687 | ata_acpi_set_state(ap, PMSG_ON); |
3688 | ||
500530f6 TH |
3689 | if (ap->ops->port_resume) |
3690 | rc = ap->ops->port_resume(ap); | |
3691 | ||
6746544c TH |
3692 | /* tell ACPI that we're resuming */ |
3693 | ata_acpi_on_resume(ap); | |
3694 | ||
9666f400 | 3695 | /* report result */ |
500530f6 TH |
3696 | spin_lock_irqsave(ap->lock, flags); |
3697 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
3698 | if (ap->pm_result) { | |
3699 | *ap->pm_result = rc; | |
3700 | ap->pm_result = NULL; | |
3701 | } | |
3702 | spin_unlock_irqrestore(ap->lock, flags); | |
3703 | } | |
6ffa01d8 | 3704 | #endif /* CONFIG_PM */ |