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c82ee6d3 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ece1d636 TH |
2 | /* |
3 | * libata-eh.c - libata error handling | |
4 | * | |
ece1d636 TH |
5 | * Copyright 2006 Tejun Heo <htejun@gmail.com> |
6 | * | |
ece1d636 | 7 | * libata documentation is available via 'make {ps|pdf}docs', |
9bb9a39c | 8 | * as Documentation/driver-api/libata.rst |
ece1d636 TH |
9 | * |
10 | * Hardware documentation available from http://www.t13.org/ and | |
11 | * http://www.sata-io.org/ | |
ece1d636 TH |
12 | */ |
13 | ||
ece1d636 | 14 | #include <linux/kernel.h> |
242f9dcb | 15 | #include <linux/blkdev.h> |
38789fda | 16 | #include <linux/export.h> |
2855568b | 17 | #include <linux/pci.h> |
ece1d636 TH |
18 | #include <scsi/scsi.h> |
19 | #include <scsi/scsi_host.h> | |
20 | #include <scsi/scsi_eh.h> | |
21 | #include <scsi/scsi_device.h> | |
22 | #include <scsi/scsi_cmnd.h> | |
6521148c | 23 | #include <scsi/scsi_dbg.h> |
c6fd2807 | 24 | #include "../scsi/scsi_transport_api.h" |
ece1d636 TH |
25 | |
26 | #include <linux/libata.h> | |
27 | ||
255c03d1 | 28 | #include <trace/events/libata.h> |
ece1d636 TH |
29 | #include "libata.h" |
30 | ||
7d47e8d4 | 31 | enum { |
3884f7b0 | 32 | /* speed down verdicts */ |
7d47e8d4 TH |
33 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
34 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
35 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 36 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
37 | |
38 | /* error flags */ | |
39 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 40 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
d9027470 | 41 | ATA_EFLAG_OLD_ER = (1 << 31), |
3884f7b0 TH |
42 | |
43 | /* error categories */ | |
44 | ATA_ECAT_NONE = 0, | |
45 | ATA_ECAT_ATA_BUS = 1, | |
46 | ATA_ECAT_TOUT_HSM = 2, | |
47 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
48 | ATA_ECAT_DUBIOUS_NONE = 4, |
49 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
50 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
51 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
52 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 53 | |
87fbc5a0 TH |
54 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
55 | ||
0a2c0f56 TH |
56 | /* always put at least this amount of time between resets */ |
57 | ATA_EH_RESET_COOL_DOWN = 5000, | |
58 | ||
341c2c95 TH |
59 | /* Waiting in ->prereset can never be reliable. It's |
60 | * sometimes nice to wait there but it can't be depended upon; | |
61 | * otherwise, we wouldn't be resetting. Just give it enough | |
62 | * time for most drives to spin up. | |
63 | */ | |
64 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
65 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
66 | |
67 | ATA_EH_UA_TRIES = 5, | |
c2c7a89c TH |
68 | |
69 | /* probe speed down parameters, see ata_eh_schedule_probe() */ | |
70 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ | |
71 | ATA_EH_PROBE_TRIALS = 2, | |
31daabda TH |
72 | }; |
73 | ||
74 | /* The following table determines how we sequence resets. Each entry | |
75 | * represents timeout for that try. The first try can be soft or | |
76 | * hardreset. All others are hardreset if available. In most cases | |
77 | * the first reset w/ 10sec timeout should succeed. Following entries | |
35bf8821 DW |
78 | * are mostly for error handling, hotplug and those outlier devices that |
79 | * take an exceptionally long time to recover from reset. | |
31daabda TH |
80 | */ |
81 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
82 | 10000, /* most drives spin up by 10sec */ |
83 | 10000, /* > 99% working drives spin up before 20sec */ | |
35bf8821 | 84 | 35000, /* give > 30 secs of idleness for outlier devices */ |
341c2c95 | 85 | 5000, /* and sweet one last chance */ |
d8af0eb6 | 86 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
87 | }; |
88 | ||
87fbc5a0 TH |
89 | static const unsigned long ata_eh_identify_timeouts[] = { |
90 | 5000, /* covers > 99% of successes and not too boring on failures */ | |
91 | 10000, /* combined time till here is enough even for media access */ | |
92 | 30000, /* for true idiots */ | |
93 | ULONG_MAX, | |
94 | }; | |
95 | ||
6013efd8 TH |
96 | static const unsigned long ata_eh_flush_timeouts[] = { |
97 | 15000, /* be generous with flush */ | |
98 | 15000, /* ditto */ | |
99 | 30000, /* and even more generous */ | |
100 | ULONG_MAX, | |
101 | }; | |
102 | ||
87fbc5a0 TH |
103 | static const unsigned long ata_eh_other_timeouts[] = { |
104 | 5000, /* same rationale as identify timeout */ | |
105 | 10000, /* ditto */ | |
106 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
107 | ULONG_MAX, | |
108 | }; | |
109 | ||
110 | struct ata_eh_cmd_timeout_ent { | |
111 | const u8 *commands; | |
112 | const unsigned long *timeouts; | |
113 | }; | |
114 | ||
115 | /* The following table determines timeouts to use for EH internal | |
116 | * commands. Each table entry is a command class and matches the | |
117 | * commands the entry applies to and the timeout table to use. | |
118 | * | |
119 | * On the retry after a command timed out, the next timeout value from | |
120 | * the table is used. If the table doesn't contain further entries, | |
121 | * the last value is used. | |
122 | * | |
123 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
124 | * command class, so if SET_FEATURES times out on the first try, the | |
125 | * next try will use the second timeout value only for that class. | |
126 | */ | |
127 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
128 | static const struct ata_eh_cmd_timeout_ent | |
129 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
130 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
131 | .timeouts = ata_eh_identify_timeouts, }, | |
132 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), | |
133 | .timeouts = ata_eh_other_timeouts, }, | |
134 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
135 | .timeouts = ata_eh_other_timeouts, }, | |
136 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
137 | .timeouts = ata_eh_other_timeouts, }, | |
138 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
139 | .timeouts = ata_eh_other_timeouts, }, | |
6013efd8 TH |
140 | { .commands = CMDS(ATA_CMD_FLUSH, ATA_CMD_FLUSH_EXT), |
141 | .timeouts = ata_eh_flush_timeouts }, | |
87fbc5a0 TH |
142 | }; |
143 | #undef CMDS | |
144 | ||
ad9e2762 | 145 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 146 | #ifdef CONFIG_PM |
500530f6 TH |
147 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
148 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
149 | #else /* CONFIG_PM */ |
150 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
151 | { } | |
152 | ||
153 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
154 | { } | |
6ffa01d8 | 155 | #endif /* CONFIG_PM */ |
ad9e2762 | 156 | |
0d74d872 MM |
157 | static __printf(2, 0) void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, |
158 | const char *fmt, va_list args) | |
b64bbc39 TH |
159 | { |
160 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
161 | ATA_EH_DESC_LEN - ehi->desc_len, | |
162 | fmt, args); | |
163 | } | |
164 | ||
165 | /** | |
166 | * __ata_ehi_push_desc - push error description without adding separator | |
167 | * @ehi: target EHI | |
168 | * @fmt: printf format string | |
169 | * | |
170 | * Format string according to @fmt and append it to @ehi->desc. | |
171 | * | |
172 | * LOCKING: | |
173 | * spin_lock_irqsave(host lock) | |
174 | */ | |
175 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
176 | { | |
177 | va_list args; | |
178 | ||
179 | va_start(args, fmt); | |
180 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
181 | va_end(args); | |
182 | } | |
a52fbcfc | 183 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
b64bbc39 TH |
184 | |
185 | /** | |
186 | * ata_ehi_push_desc - push error description with separator | |
187 | * @ehi: target EHI | |
188 | * @fmt: printf format string | |
189 | * | |
190 | * Format string according to @fmt and append it to @ehi->desc. | |
191 | * If @ehi->desc is not empty, ", " is added in-between. | |
192 | * | |
193 | * LOCKING: | |
194 | * spin_lock_irqsave(host lock) | |
195 | */ | |
196 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
197 | { | |
198 | va_list args; | |
199 | ||
200 | if (ehi->desc_len) | |
201 | __ata_ehi_push_desc(ehi, ", "); | |
202 | ||
203 | va_start(args, fmt); | |
204 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
205 | va_end(args); | |
206 | } | |
a52fbcfc | 207 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); |
b64bbc39 TH |
208 | |
209 | /** | |
210 | * ata_ehi_clear_desc - clean error description | |
211 | * @ehi: target EHI | |
212 | * | |
213 | * Clear @ehi->desc. | |
214 | * | |
215 | * LOCKING: | |
216 | * spin_lock_irqsave(host lock) | |
217 | */ | |
218 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
219 | { | |
220 | ehi->desc[0] = '\0'; | |
221 | ehi->desc_len = 0; | |
222 | } | |
a52fbcfc | 223 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); |
b64bbc39 | 224 | |
cbcdd875 TH |
225 | /** |
226 | * ata_port_desc - append port description | |
227 | * @ap: target ATA port | |
228 | * @fmt: printf format string | |
229 | * | |
230 | * Format string according to @fmt and append it to port | |
231 | * description. If port description is not empty, " " is added | |
232 | * in-between. This function is to be used while initializing | |
233 | * ata_host. The description is printed on host registration. | |
234 | * | |
235 | * LOCKING: | |
236 | * None. | |
237 | */ | |
238 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
239 | { | |
240 | va_list args; | |
241 | ||
242 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
243 | ||
244 | if (ap->link.eh_info.desc_len) | |
245 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
246 | ||
247 | va_start(args, fmt); | |
248 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
249 | va_end(args); | |
250 | } | |
a52fbcfc | 251 | EXPORT_SYMBOL_GPL(ata_port_desc); |
cbcdd875 TH |
252 | |
253 | #ifdef CONFIG_PCI | |
cbcdd875 TH |
254 | /** |
255 | * ata_port_pbar_desc - append PCI BAR description | |
256 | * @ap: target ATA port | |
257 | * @bar: target PCI BAR | |
258 | * @offset: offset into PCI BAR | |
259 | * @name: name of the area | |
260 | * | |
261 | * If @offset is negative, this function formats a string which | |
262 | * contains the name, address, size and type of the BAR and | |
263 | * appends it to the port description. If @offset is zero or | |
264 | * positive, only name and offsetted address is appended. | |
265 | * | |
266 | * LOCKING: | |
267 | * None. | |
268 | */ | |
269 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
270 | const char *name) | |
271 | { | |
272 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
273 | char *type = ""; | |
274 | unsigned long long start, len; | |
275 | ||
276 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
277 | type = "m"; | |
278 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
279 | type = "i"; | |
280 | ||
281 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
282 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
283 | ||
284 | if (offset < 0) | |
285 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
286 | else | |
e6a73ab1 AM |
287 | ata_port_desc(ap, "%s 0x%llx", name, |
288 | start + (unsigned long long)offset); | |
cbcdd875 | 289 | } |
a52fbcfc | 290 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); |
cbcdd875 TH |
291 | #endif /* CONFIG_PCI */ |
292 | ||
87fbc5a0 TH |
293 | static int ata_lookup_timeout_table(u8 cmd) |
294 | { | |
295 | int i; | |
296 | ||
297 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
298 | const u8 *cur; | |
299 | ||
300 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
301 | if (*cur == cmd) | |
302 | return i; | |
303 | } | |
304 | ||
305 | return -1; | |
306 | } | |
307 | ||
308 | /** | |
309 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
310 | * @dev: target device | |
311 | * @cmd: internal command to be issued | |
312 | * | |
313 | * Determine timeout for internal command @cmd for @dev. | |
314 | * | |
315 | * LOCKING: | |
316 | * EH context. | |
317 | * | |
318 | * RETURNS: | |
319 | * Determined timeout. | |
320 | */ | |
321 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) | |
322 | { | |
323 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
324 | int ent = ata_lookup_timeout_table(cmd); | |
325 | int idx; | |
326 | ||
327 | if (ent < 0) | |
328 | return ATA_EH_CMD_DFL_TIMEOUT; | |
329 | ||
330 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
331 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
332 | } | |
333 | ||
334 | /** | |
335 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
336 | * @dev: target device | |
337 | * @cmd: internal command which timed out | |
338 | * | |
339 | * Notify EH that internal command @cmd for @dev timed out. This | |
340 | * function should be called only for commands whose timeouts are | |
341 | * determined using ata_internal_cmd_timeout(). | |
342 | * | |
343 | * LOCKING: | |
344 | * EH context. | |
345 | */ | |
346 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
347 | { | |
348 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
349 | int ent = ata_lookup_timeout_table(cmd); | |
350 | int idx; | |
351 | ||
352 | if (ent < 0) | |
353 | return; | |
354 | ||
355 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
356 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) | |
357 | ehc->cmd_timeout_idx[dev->devno][ent]++; | |
358 | } | |
359 | ||
3884f7b0 | 360 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
361 | unsigned int err_mask) |
362 | { | |
363 | struct ata_ering_entry *ent; | |
364 | ||
365 | WARN_ON(!err_mask); | |
366 | ||
367 | ering->cursor++; | |
368 | ering->cursor %= ATA_ERING_SIZE; | |
369 | ||
370 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 371 | ent->eflags = eflags; |
0c247c55 TH |
372 | ent->err_mask = err_mask; |
373 | ent->timestamp = get_jiffies_64(); | |
374 | } | |
375 | ||
76326ac1 TH |
376 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
377 | { | |
378 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
379 | ||
380 | if (ent->err_mask) | |
381 | return ent; | |
382 | return NULL; | |
383 | } | |
384 | ||
d9027470 GG |
385 | int ata_ering_map(struct ata_ering *ering, |
386 | int (*map_fn)(struct ata_ering_entry *, void *), | |
387 | void *arg) | |
0c247c55 TH |
388 | { |
389 | int idx, rc = 0; | |
390 | struct ata_ering_entry *ent; | |
391 | ||
392 | idx = ering->cursor; | |
393 | do { | |
394 | ent = &ering->ring[idx]; | |
395 | if (!ent->err_mask) | |
396 | break; | |
397 | rc = map_fn(ent, arg); | |
398 | if (rc) | |
399 | break; | |
400 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
401 | } while (idx != ering->cursor); | |
402 | ||
403 | return rc; | |
404 | } | |
405 | ||
60428407 | 406 | static int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg) |
d9027470 GG |
407 | { |
408 | ent->eflags |= ATA_EFLAG_OLD_ER; | |
409 | return 0; | |
410 | } | |
411 | ||
412 | static void ata_ering_clear(struct ata_ering *ering) | |
413 | { | |
414 | ata_ering_map(ering, ata_ering_clear_cb, NULL); | |
415 | } | |
416 | ||
64f65ca6 TH |
417 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
418 | { | |
9af5c9c9 | 419 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
420 | |
421 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
422 | } | |
423 | ||
f58229f8 | 424 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
425 | struct ata_eh_info *ehi, unsigned int action) |
426 | { | |
f58229f8 | 427 | struct ata_device *tdev; |
af181c2d TH |
428 | |
429 | if (!dev) { | |
430 | ehi->action &= ~action; | |
1eca4365 | 431 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 432 | ehi->dev_action[tdev->devno] &= ~action; |
af181c2d TH |
433 | } else { |
434 | /* doesn't make sense for port-wide EH actions */ | |
435 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
436 | ||
437 | /* break ehi->action into ehi->dev_action */ | |
438 | if (ehi->action & action) { | |
1eca4365 | 439 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
440 | ehi->dev_action[tdev->devno] |= |
441 | ehi->action & action; | |
af181c2d TH |
442 | ehi->action &= ~action; |
443 | } | |
444 | ||
445 | /* turn off the specified per-dev action */ | |
446 | ehi->dev_action[dev->devno] &= ~action; | |
447 | } | |
448 | } | |
449 | ||
c0c362b6 TH |
450 | /** |
451 | * ata_eh_acquire - acquire EH ownership | |
452 | * @ap: ATA port to acquire EH ownership for | |
453 | * | |
454 | * Acquire EH ownership for @ap. This is the basic exclusion | |
455 | * mechanism for ports sharing a host. Only one port hanging off | |
456 | * the same host can claim the ownership of EH. | |
457 | * | |
458 | * LOCKING: | |
459 | * EH context. | |
460 | */ | |
461 | void ata_eh_acquire(struct ata_port *ap) | |
462 | { | |
463 | mutex_lock(&ap->host->eh_mutex); | |
464 | WARN_ON_ONCE(ap->host->eh_owner); | |
465 | ap->host->eh_owner = current; | |
466 | } | |
467 | ||
468 | /** | |
469 | * ata_eh_release - release EH ownership | |
470 | * @ap: ATA port to release EH ownership for | |
471 | * | |
472 | * Release EH ownership for @ap if the caller. The caller must | |
473 | * have acquired EH ownership using ata_eh_acquire() previously. | |
474 | * | |
475 | * LOCKING: | |
476 | * EH context. | |
477 | */ | |
478 | void ata_eh_release(struct ata_port *ap) | |
479 | { | |
480 | WARN_ON_ONCE(ap->host->eh_owner != current); | |
481 | ap->host->eh_owner = NULL; | |
482 | mutex_unlock(&ap->host->eh_mutex); | |
483 | } | |
484 | ||
ece180d1 TH |
485 | static void ata_eh_unload(struct ata_port *ap) |
486 | { | |
487 | struct ata_link *link; | |
488 | struct ata_device *dev; | |
489 | unsigned long flags; | |
490 | ||
491 | /* Restore SControl IPM and SPD for the next driver and | |
492 | * disable attached devices. | |
493 | */ | |
494 | ata_for_each_link(link, ap, PMP_FIRST) { | |
495 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
496 | ata_for_each_dev(dev, link, ALL) | |
497 | ata_dev_disable(dev); | |
498 | } | |
499 | ||
500 | /* freeze and set UNLOADED */ | |
501 | spin_lock_irqsave(ap->lock, flags); | |
502 | ||
503 | ata_port_freeze(ap); /* won't be thawed */ | |
504 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
505 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
506 | ||
507 | spin_unlock_irqrestore(ap->lock, flags); | |
508 | } | |
509 | ||
ece1d636 TH |
510 | /** |
511 | * ata_scsi_error - SCSI layer error handler callback | |
512 | * @host: SCSI host on which error occurred | |
513 | * | |
514 | * Handles SCSI-layer-thrown error events. | |
515 | * | |
516 | * LOCKING: | |
517 | * Inherited from SCSI layer (none, can sleep) | |
518 | * | |
519 | * RETURNS: | |
520 | * Zero. | |
521 | */ | |
381544bb | 522 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 523 | { |
35bb94b1 | 524 | struct ata_port *ap = ata_shost_to_port(host); |
ad9e2762 | 525 | unsigned long flags; |
c34aeebc | 526 | LIST_HEAD(eh_work_q); |
ece1d636 TH |
527 | |
528 | DPRINTK("ENTER\n"); | |
529 | ||
c34aeebc JB |
530 | spin_lock_irqsave(host->host_lock, flags); |
531 | list_splice_init(&host->eh_cmd_q, &eh_work_q); | |
532 | spin_unlock_irqrestore(host->host_lock, flags); | |
533 | ||
0e0b494c JB |
534 | ata_scsi_cmd_error_handler(host, ap, &eh_work_q); |
535 | ||
536 | /* If we timed raced normal completion and there is nothing to | |
537 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ | |
538 | ata_scsi_port_error_handler(host, ap); | |
539 | ||
540 | /* finish or retry handled scmd's and clean up */ | |
72d8c36e | 541 | WARN_ON(!list_empty(&eh_work_q)); |
0e0b494c JB |
542 | |
543 | DPRINTK("EXIT\n"); | |
544 | } | |
545 | ||
546 | /** | |
547 | * ata_scsi_cmd_error_handler - error callback for a list of commands | |
548 | * @host: scsi host containing the port | |
549 | * @ap: ATA port within the host | |
550 | * @eh_work_q: list of commands to process | |
551 | * | |
552 | * process the given list of commands and return those finished to the | |
553 | * ap->eh_done_q. This function is the first part of the libata error | |
554 | * handler which processes a given list of failed commands. | |
555 | */ | |
556 | void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, | |
557 | struct list_head *eh_work_q) | |
558 | { | |
559 | int i; | |
560 | unsigned long flags; | |
561 | ||
c429137a TH |
562 | /* make sure sff pio task is not running */ |
563 | ata_sff_flush_pio_task(ap); | |
ece1d636 | 564 | |
cca3974e | 565 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
566 | |
567 | /* For new EH, all qcs are finished in one of three ways - | |
568 | * normal completion, error completion, and SCSI timeout. | |
c96f1732 | 569 | * Both completions can race against SCSI timeout. When normal |
ad9e2762 TH |
570 | * completion wins, the qc never reaches EH. When error |
571 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
572 | * | |
573 | * When SCSI timeout wins, things are a bit more complex. | |
574 | * Normal or error completion can occur after the timeout but | |
575 | * before this point. In such cases, both types of | |
576 | * completions are honored. A scmd is determined to have | |
577 | * timed out iff its associated qc is active and not failed. | |
578 | */ | |
a4f08141 | 579 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 TH |
580 | if (ap->ops->error_handler) { |
581 | struct scsi_cmnd *scmd, *tmp; | |
582 | int nr_timedout = 0; | |
583 | ||
c96f1732 AC |
584 | /* This must occur under the ap->lock as we don't want |
585 | a polled recovery to race the real interrupt handler | |
d9027470 | 586 | |
c96f1732 AC |
587 | The lost_interrupt handler checks for any completed but |
588 | non-notified command and completes much like an IRQ handler. | |
d9027470 | 589 | |
c96f1732 AC |
590 | We then fall into the error recovery code which will treat |
591 | this as if normal completion won the race */ | |
592 | ||
593 | if (ap->ops->lost_interrupt) | |
594 | ap->ops->lost_interrupt(ap); | |
d9027470 | 595 | |
0e0b494c | 596 | list_for_each_entry_safe(scmd, tmp, eh_work_q, eh_entry) { |
ad9e2762 TH |
597 | struct ata_queued_cmd *qc; |
598 | ||
258c4e5c | 599 | ata_qc_for_each_raw(ap, qc, i) { |
ad9e2762 TH |
600 | if (qc->flags & ATA_QCFLAG_ACTIVE && |
601 | qc->scsicmd == scmd) | |
602 | break; | |
603 | } | |
604 | ||
605 | if (i < ATA_MAX_QUEUE) { | |
606 | /* the scmd has an associated qc */ | |
607 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
608 | /* which hasn't failed yet, timeout */ | |
609 | qc->err_mask |= AC_ERR_TIMEOUT; | |
610 | qc->flags |= ATA_QCFLAG_FAILED; | |
611 | nr_timedout++; | |
612 | } | |
613 | } else { | |
614 | /* Normal completion occurred after | |
615 | * SCSI timeout but before this point. | |
616 | * Successfully complete it. | |
617 | */ | |
618 | scmd->retries = scmd->allowed; | |
619 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
620 | } | |
621 | } | |
622 | ||
623 | /* If we have timed out qcs. They belong to EH from | |
624 | * this point but the state of the controller is | |
625 | * unknown. Freeze the port to make sure the IRQ | |
626 | * handler doesn't diddle with those qcs. This must | |
627 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
628 | */ | |
629 | if (nr_timedout) | |
630 | __ata_port_freeze(ap); | |
631 | ||
a1e10f7e TH |
632 | |
633 | /* initialize eh_tries */ | |
634 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
a4f08141 PM |
635 | } |
636 | spin_unlock_irqrestore(ap->lock, flags); | |
d9027470 | 637 | |
0e0b494c JB |
638 | } |
639 | EXPORT_SYMBOL(ata_scsi_cmd_error_handler); | |
640 | ||
641 | /** | |
642 | * ata_scsi_port_error_handler - recover the port after the commands | |
643 | * @host: SCSI host containing the port | |
644 | * @ap: the ATA port | |
645 | * | |
646 | * Handle the recovery of the port @ap after all the commands | |
647 | * have been recovered. | |
648 | */ | |
649 | void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap) | |
650 | { | |
651 | unsigned long flags; | |
ad9e2762 | 652 | |
ad9e2762 TH |
653 | /* invoke error handler */ |
654 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
655 | struct ata_link *link; |
656 | ||
c0c362b6 TH |
657 | /* acquire EH ownership */ |
658 | ata_eh_acquire(ap); | |
659 | repeat: | |
5ddf24c5 TH |
660 | /* kill fast drain timer */ |
661 | del_timer_sync(&ap->fastdrain_timer); | |
662 | ||
500530f6 TH |
663 | /* process port resume request */ |
664 | ata_eh_handle_port_resume(ap); | |
665 | ||
f3e81b19 | 666 | /* fetch & clear EH info */ |
e30349d2 | 667 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 668 | |
1eca4365 | 669 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
670 | struct ata_eh_context *ehc = &link->eh_context; |
671 | struct ata_device *dev; | |
672 | ||
cf1b86c8 TH |
673 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
674 | link->eh_context.i = link->eh_info; | |
675 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 676 | |
1eca4365 | 677 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
678 | int devno = dev->devno; |
679 | ||
680 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
681 | if (ata_ncq_enabled(dev)) | |
682 | ehc->saved_ncq_enabled |= 1 << devno; | |
683 | } | |
cf1b86c8 | 684 | } |
f3e81b19 | 685 | |
b51e9e5d TH |
686 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
687 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 688 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 689 | |
e30349d2 | 690 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 691 | |
500530f6 TH |
692 | /* invoke EH, skip if unloading or suspended */ |
693 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 694 | ap->ops->error_handler(ap); |
ece180d1 TH |
695 | else { |
696 | /* if unloading, commence suicide */ | |
697 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
698 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
699 | ata_eh_unload(ap); | |
720ba126 | 700 | ata_eh_finish(ap); |
ece180d1 | 701 | } |
ad9e2762 | 702 | |
500530f6 TH |
703 | /* process port suspend request */ |
704 | ata_eh_handle_port_suspend(ap); | |
705 | ||
25985edc | 706 | /* Exception might have happened after ->error_handler |
ad9e2762 TH |
707 | * recovered the port but before this point. Repeat |
708 | * EH in such case. | |
709 | */ | |
e30349d2 | 710 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 711 | |
b51e9e5d | 712 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 713 | if (--ap->eh_tries) { |
e30349d2 | 714 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
715 | goto repeat; |
716 | } | |
a9a79dfe JP |
717 | ata_port_err(ap, |
718 | "EH pending after %d tries, giving up\n", | |
719 | ATA_EH_MAX_TRIES); | |
914616a3 | 720 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
721 | } |
722 | ||
f3e81b19 | 723 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 724 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 725 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 726 | |
e4a9c373 DW |
727 | /* end eh (clear host_eh_scheduled) while holding |
728 | * ap->lock such that if exception occurs after this | |
729 | * point but before EH completion, SCSI midlayer will | |
ad9e2762 TH |
730 | * re-initiate EH. |
731 | */ | |
e4a9c373 | 732 | ap->ops->end_eh(ap); |
ad9e2762 | 733 | |
e30349d2 | 734 | spin_unlock_irqrestore(ap->lock, flags); |
c0c362b6 | 735 | ata_eh_release(ap); |
ad9e2762 | 736 | } else { |
9af5c9c9 | 737 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
738 | ap->ops->eng_timeout(ap); |
739 | } | |
ece1d636 | 740 | |
ece1d636 TH |
741 | scsi_eh_flush_done_q(&ap->eh_done_q); |
742 | ||
ad9e2762 | 743 | /* clean up */ |
e30349d2 | 744 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 745 | |
1cdaf534 | 746 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 747 | ap->pflags &= ~ATA_PFLAG_LOADING; |
6f54120e JY |
748 | else if ((ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) && |
749 | !(ap->flags & ATA_FLAG_SAS_HOST)) | |
ad72cf98 | 750 | schedule_delayed_work(&ap->hotplug_task, 0); |
1cdaf534 TH |
751 | |
752 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
a9a79dfe | 753 | ata_port_info(ap, "EH complete\n"); |
580b2102 | 754 | |
b51e9e5d | 755 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 756 | |
c6cf9e99 | 757 | /* tell wait_eh that we're done */ |
b51e9e5d | 758 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
759 | wake_up_all(&ap->eh_wait_q); |
760 | ||
e30349d2 | 761 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 762 | } |
0e0b494c | 763 | EXPORT_SYMBOL_GPL(ata_scsi_port_error_handler); |
ece1d636 | 764 | |
c6cf9e99 TH |
765 | /** |
766 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
767 | * @ap: Port to wait EH for | |
768 | * | |
769 | * Wait until the currently pending EH is complete. | |
770 | * | |
771 | * LOCKING: | |
772 | * Kernel thread context (may sleep). | |
773 | */ | |
774 | void ata_port_wait_eh(struct ata_port *ap) | |
775 | { | |
776 | unsigned long flags; | |
777 | DEFINE_WAIT(wait); | |
778 | ||
779 | retry: | |
ba6a1308 | 780 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 781 | |
b51e9e5d | 782 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 783 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 784 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 785 | schedule(); |
ba6a1308 | 786 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 787 | } |
0a1b622e | 788 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 789 | |
ba6a1308 | 790 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
791 | |
792 | /* make sure SCSI EH is complete */ | |
cca3974e | 793 | if (scsi_host_in_recovery(ap->scsi_host)) { |
97750ceb | 794 | ata_msleep(ap, 10); |
c6cf9e99 TH |
795 | goto retry; |
796 | } | |
797 | } | |
81c757bc | 798 | EXPORT_SYMBOL_GPL(ata_port_wait_eh); |
c6cf9e99 | 799 | |
5ddf24c5 TH |
800 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
801 | { | |
258c4e5c | 802 | struct ata_queued_cmd *qc; |
5ddf24c5 TH |
803 | unsigned int tag; |
804 | int nr = 0; | |
805 | ||
806 | /* count only non-internal commands */ | |
258c4e5c JA |
807 | ata_qc_for_each(ap, qc, tag) { |
808 | if (qc) | |
5ddf24c5 | 809 | nr++; |
9d207acc | 810 | } |
5ddf24c5 TH |
811 | |
812 | return nr; | |
813 | } | |
814 | ||
b93ab338 | 815 | void ata_eh_fastdrain_timerfn(struct timer_list *t) |
5ddf24c5 | 816 | { |
b93ab338 | 817 | struct ata_port *ap = from_timer(ap, t, fastdrain_timer); |
5ddf24c5 TH |
818 | unsigned long flags; |
819 | int cnt; | |
820 | ||
821 | spin_lock_irqsave(ap->lock, flags); | |
822 | ||
823 | cnt = ata_eh_nr_in_flight(ap); | |
824 | ||
825 | /* are we done? */ | |
826 | if (!cnt) | |
827 | goto out_unlock; | |
828 | ||
829 | if (cnt == ap->fastdrain_cnt) { | |
258c4e5c | 830 | struct ata_queued_cmd *qc; |
5ddf24c5 TH |
831 | unsigned int tag; |
832 | ||
833 | /* No progress during the last interval, tag all | |
834 | * in-flight qcs as timed out and freeze the port. | |
835 | */ | |
258c4e5c | 836 | ata_qc_for_each(ap, qc, tag) { |
5ddf24c5 TH |
837 | if (qc) |
838 | qc->err_mask |= AC_ERR_TIMEOUT; | |
839 | } | |
840 | ||
841 | ata_port_freeze(ap); | |
842 | } else { | |
843 | /* some qcs have finished, give it another chance */ | |
844 | ap->fastdrain_cnt = cnt; | |
845 | ap->fastdrain_timer.expires = | |
341c2c95 | 846 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
847 | add_timer(&ap->fastdrain_timer); |
848 | } | |
849 | ||
850 | out_unlock: | |
851 | spin_unlock_irqrestore(ap->lock, flags); | |
852 | } | |
853 | ||
854 | /** | |
855 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
856 | * @ap: target ATA port | |
857 | * @fastdrain: activate fast drain | |
858 | * | |
859 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
860 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
861 | * that EH kicks in in timely manner. | |
862 | * | |
863 | * LOCKING: | |
864 | * spin_lock_irqsave(host lock) | |
865 | */ | |
866 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
867 | { | |
868 | int cnt; | |
869 | ||
870 | /* already scheduled? */ | |
871 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
872 | return; | |
873 | ||
874 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
875 | ||
876 | if (!fastdrain) | |
877 | return; | |
878 | ||
879 | /* do we have in-flight qcs? */ | |
880 | cnt = ata_eh_nr_in_flight(ap); | |
881 | if (!cnt) | |
882 | return; | |
883 | ||
884 | /* activate fast drain */ | |
885 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
886 | ap->fastdrain_timer.expires = |
887 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
888 | add_timer(&ap->fastdrain_timer); |
889 | } | |
890 | ||
f686bcb8 TH |
891 | /** |
892 | * ata_qc_schedule_eh - schedule qc for error handling | |
893 | * @qc: command to schedule error handling for | |
894 | * | |
895 | * Schedule error handling for @qc. EH will kick in as soon as | |
896 | * other commands are drained. | |
897 | * | |
898 | * LOCKING: | |
cca3974e | 899 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
900 | */ |
901 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
902 | { | |
903 | struct ata_port *ap = qc->ap; | |
904 | ||
905 | WARN_ON(!ap->ops->error_handler); | |
906 | ||
907 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 908 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
909 | |
910 | /* The following will fail if timeout has already expired. | |
911 | * ata_scsi_error() takes care of such scmds on EH entry. | |
912 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
913 | * this function completes. | |
914 | */ | |
242f9dcb | 915 | blk_abort_request(qc->scsicmd->request); |
f686bcb8 TH |
916 | } |
917 | ||
7b70fc03 | 918 | /** |
e4a9c373 DW |
919 | * ata_std_sched_eh - non-libsas ata_ports issue eh with this common routine |
920 | * @ap: ATA port to schedule EH for | |
7b70fc03 | 921 | * |
e4a9c373 | 922 | * LOCKING: inherited from ata_port_schedule_eh |
cca3974e | 923 | * spin_lock_irqsave(host lock) |
7b70fc03 | 924 | */ |
e4a9c373 | 925 | void ata_std_sched_eh(struct ata_port *ap) |
7b70fc03 TH |
926 | { |
927 | WARN_ON(!ap->ops->error_handler); | |
928 | ||
f4d6d004 TH |
929 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
930 | return; | |
931 | ||
5ddf24c5 | 932 | ata_eh_set_pending(ap, 1); |
cca3974e | 933 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
934 | |
935 | DPRINTK("port EH scheduled\n"); | |
936 | } | |
e4a9c373 DW |
937 | EXPORT_SYMBOL_GPL(ata_std_sched_eh); |
938 | ||
939 | /** | |
940 | * ata_std_end_eh - non-libsas ata_ports complete eh with this common routine | |
941 | * @ap: ATA port to end EH for | |
942 | * | |
943 | * In the libata object model there is a 1:1 mapping of ata_port to | |
944 | * shost, so host fields can be directly manipulated under ap->lock, in | |
945 | * the libsas case we need to hold a lock at the ha->level to coordinate | |
946 | * these events. | |
947 | * | |
948 | * LOCKING: | |
949 | * spin_lock_irqsave(host lock) | |
950 | */ | |
951 | void ata_std_end_eh(struct ata_port *ap) | |
952 | { | |
953 | struct Scsi_Host *host = ap->scsi_host; | |
954 | ||
955 | host->host_eh_scheduled = 0; | |
956 | } | |
957 | EXPORT_SYMBOL(ata_std_end_eh); | |
958 | ||
959 | ||
960 | /** | |
961 | * ata_port_schedule_eh - schedule error handling without a qc | |
962 | * @ap: ATA port to schedule EH for | |
963 | * | |
964 | * Schedule error handling for @ap. EH will kick in as soon as | |
965 | * all commands are drained. | |
966 | * | |
967 | * LOCKING: | |
968 | * spin_lock_irqsave(host lock) | |
969 | */ | |
970 | void ata_port_schedule_eh(struct ata_port *ap) | |
971 | { | |
972 | /* see: ata_std_sched_eh, unless you know better */ | |
973 | ap->ops->sched_eh(ap); | |
974 | } | |
a52fbcfc | 975 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
7b70fc03 | 976 | |
dbd82616 | 977 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 | 978 | { |
258c4e5c | 979 | struct ata_queued_cmd *qc; |
7b70fc03 TH |
980 | int tag, nr_aborted = 0; |
981 | ||
982 | WARN_ON(!ap->ops->error_handler); | |
983 | ||
5ddf24c5 TH |
984 | /* we're gonna abort all commands, no need for fast drain */ |
985 | ata_eh_set_pending(ap, 0); | |
986 | ||
28361c40 | 987 | /* include internal tag in iteration */ |
258c4e5c | 988 | ata_qc_for_each_with_internal(ap, qc, tag) { |
dbd82616 | 989 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
990 | qc->flags |= ATA_QCFLAG_FAILED; |
991 | ata_qc_complete(qc); | |
992 | nr_aborted++; | |
993 | } | |
994 | } | |
995 | ||
996 | if (!nr_aborted) | |
997 | ata_port_schedule_eh(ap); | |
998 | ||
999 | return nr_aborted; | |
1000 | } | |
1001 | ||
dbd82616 TH |
1002 | /** |
1003 | * ata_link_abort - abort all qc's on the link | |
1004 | * @link: ATA link to abort qc's for | |
1005 | * | |
1006 | * Abort all active qc's active on @link and schedule EH. | |
1007 | * | |
1008 | * LOCKING: | |
1009 | * spin_lock_irqsave(host lock) | |
1010 | * | |
1011 | * RETURNS: | |
1012 | * Number of aborted qc's. | |
1013 | */ | |
1014 | int ata_link_abort(struct ata_link *link) | |
1015 | { | |
1016 | return ata_do_link_abort(link->ap, link); | |
1017 | } | |
a52fbcfc | 1018 | EXPORT_SYMBOL_GPL(ata_link_abort); |
dbd82616 TH |
1019 | |
1020 | /** | |
1021 | * ata_port_abort - abort all qc's on the port | |
1022 | * @ap: ATA port to abort qc's for | |
1023 | * | |
1024 | * Abort all active qc's of @ap and schedule EH. | |
1025 | * | |
1026 | * LOCKING: | |
1027 | * spin_lock_irqsave(host_set lock) | |
1028 | * | |
1029 | * RETURNS: | |
1030 | * Number of aborted qc's. | |
1031 | */ | |
1032 | int ata_port_abort(struct ata_port *ap) | |
1033 | { | |
1034 | return ata_do_link_abort(ap, NULL); | |
1035 | } | |
a52fbcfc | 1036 | EXPORT_SYMBOL_GPL(ata_port_abort); |
dbd82616 | 1037 | |
e3180499 TH |
1038 | /** |
1039 | * __ata_port_freeze - freeze port | |
1040 | * @ap: ATA port to freeze | |
1041 | * | |
1042 | * This function is called when HSM violation or some other | |
1043 | * condition disrupts normal operation of the port. Frozen port | |
1044 | * is not allowed to perform any operation until the port is | |
1045 | * thawed, which usually follows a successful reset. | |
1046 | * | |
1047 | * ap->ops->freeze() callback can be used for freezing the port | |
1048 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
1049 | * port cannot be frozen hardware-wise, the interrupt handler | |
1050 | * must ack and clear interrupts unconditionally while the port | |
1051 | * is frozen. | |
1052 | * | |
1053 | * LOCKING: | |
cca3974e | 1054 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1055 | */ |
1056 | static void __ata_port_freeze(struct ata_port *ap) | |
1057 | { | |
1058 | WARN_ON(!ap->ops->error_handler); | |
1059 | ||
1060 | if (ap->ops->freeze) | |
1061 | ap->ops->freeze(ap); | |
1062 | ||
b51e9e5d | 1063 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 1064 | |
44877b4e | 1065 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
1066 | } |
1067 | ||
1068 | /** | |
1069 | * ata_port_freeze - abort & freeze port | |
1070 | * @ap: ATA port to freeze | |
1071 | * | |
54c38444 JG |
1072 | * Abort and freeze @ap. The freeze operation must be called |
1073 | * first, because some hardware requires special operations | |
1074 | * before the taskfile registers are accessible. | |
e3180499 TH |
1075 | * |
1076 | * LOCKING: | |
cca3974e | 1077 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1078 | * |
1079 | * RETURNS: | |
1080 | * Number of aborted commands. | |
1081 | */ | |
1082 | int ata_port_freeze(struct ata_port *ap) | |
1083 | { | |
1084 | int nr_aborted; | |
1085 | ||
1086 | WARN_ON(!ap->ops->error_handler); | |
1087 | ||
e3180499 | 1088 | __ata_port_freeze(ap); |
54c38444 | 1089 | nr_aborted = ata_port_abort(ap); |
e3180499 TH |
1090 | |
1091 | return nr_aborted; | |
1092 | } | |
a52fbcfc | 1093 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
e3180499 TH |
1094 | |
1095 | /** | |
1096 | * ata_eh_freeze_port - EH helper to freeze port | |
1097 | * @ap: ATA port to freeze | |
1098 | * | |
1099 | * Freeze @ap. | |
1100 | * | |
1101 | * LOCKING: | |
1102 | * None. | |
1103 | */ | |
1104 | void ata_eh_freeze_port(struct ata_port *ap) | |
1105 | { | |
1106 | unsigned long flags; | |
1107 | ||
1108 | if (!ap->ops->error_handler) | |
1109 | return; | |
1110 | ||
ba6a1308 | 1111 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1112 | __ata_port_freeze(ap); |
ba6a1308 | 1113 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1114 | } |
a52fbcfc | 1115 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
e3180499 TH |
1116 | |
1117 | /** | |
94bd5719 | 1118 | * ata_eh_thaw_port - EH helper to thaw port |
e3180499 TH |
1119 | * @ap: ATA port to thaw |
1120 | * | |
1121 | * Thaw frozen port @ap. | |
1122 | * | |
1123 | * LOCKING: | |
1124 | * None. | |
1125 | */ | |
1126 | void ata_eh_thaw_port(struct ata_port *ap) | |
1127 | { | |
1128 | unsigned long flags; | |
1129 | ||
1130 | if (!ap->ops->error_handler) | |
1131 | return; | |
1132 | ||
ba6a1308 | 1133 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1134 | |
b51e9e5d | 1135 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1136 | |
1137 | if (ap->ops->thaw) | |
1138 | ap->ops->thaw(ap); | |
1139 | ||
ba6a1308 | 1140 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1141 | |
44877b4e | 1142 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1143 | } |
1144 | ||
ece1d636 TH |
1145 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1146 | { | |
1147 | /* nada */ | |
1148 | } | |
1149 | ||
1150 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1151 | { | |
1152 | struct ata_port *ap = qc->ap; | |
1153 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1154 | unsigned long flags; | |
1155 | ||
ba6a1308 | 1156 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1157 | qc->scsidone = ata_eh_scsidone; |
1158 | __ata_qc_complete(qc); | |
1159 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1160 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1161 | |
1162 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1163 | } | |
1164 | ||
1165 | /** | |
1166 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1167 | * @qc: Command to complete | |
1168 | * | |
1169 | * Indicate to the mid and upper layers that an ATA command has | |
1170 | * completed. To be used from EH. | |
1171 | */ | |
1172 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1173 | { | |
1174 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1175 | scmd->retries = scmd->allowed; | |
1176 | __ata_eh_qc_complete(qc); | |
1177 | } | |
1178 | ||
1179 | /** | |
1180 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1181 | * @qc: Command to retry | |
1182 | * | |
1183 | * Indicate to the mid and upper layers that an ATA command | |
1184 | * should be retried. To be used from EH. | |
1185 | * | |
1186 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
f13e2201 | 1187 | * scmd->allowed is incremented for commands which get retried |
ece1d636 TH |
1188 | * due to unrelated failures (qc->err_mask is zero). |
1189 | */ | |
1190 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1191 | { | |
1192 | struct scsi_cmnd *scmd = qc->scsicmd; | |
f13e2201 GG |
1193 | if (!qc->err_mask) |
1194 | scmd->allowed++; | |
ece1d636 TH |
1195 | __ata_eh_qc_complete(qc); |
1196 | } | |
022bdb07 | 1197 | |
678afac6 TH |
1198 | /** |
1199 | * ata_dev_disable - disable ATA device | |
1200 | * @dev: ATA device to disable | |
1201 | * | |
1202 | * Disable @dev. | |
1203 | * | |
1204 | * Locking: | |
1205 | * EH context. | |
1206 | */ | |
1207 | void ata_dev_disable(struct ata_device *dev) | |
1208 | { | |
1209 | if (!ata_dev_enabled(dev)) | |
1210 | return; | |
1211 | ||
1212 | if (ata_msg_drv(dev->link->ap)) | |
a9a79dfe | 1213 | ata_dev_warn(dev, "disabled\n"); |
678afac6 TH |
1214 | ata_acpi_on_disable(dev); |
1215 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1216 | dev->class++; | |
99cf610a TH |
1217 | |
1218 | /* From now till the next successful probe, ering is used to | |
1219 | * track probe failures. Clear accumulated device error info. | |
1220 | */ | |
1221 | ata_ering_clear(&dev->ering); | |
678afac6 | 1222 | } |
a52fbcfc | 1223 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
678afac6 | 1224 | |
0ea035a3 TH |
1225 | /** |
1226 | * ata_eh_detach_dev - detach ATA device | |
1227 | * @dev: ATA device to detach | |
1228 | * | |
1229 | * Detach @dev. | |
1230 | * | |
1231 | * LOCKING: | |
1232 | * None. | |
1233 | */ | |
fb7fd614 | 1234 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1235 | { |
f58229f8 TH |
1236 | struct ata_link *link = dev->link; |
1237 | struct ata_port *ap = link->ap; | |
90484ebf | 1238 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1239 | unsigned long flags; |
1240 | ||
1241 | ata_dev_disable(dev); | |
1242 | ||
ba6a1308 | 1243 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1244 | |
1245 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1246 | ||
1247 | if (ata_scsi_offline_dev(dev)) { | |
1248 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1249 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1250 | } |
1251 | ||
90484ebf | 1252 | /* clear per-dev EH info */ |
f58229f8 TH |
1253 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1254 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1255 | ehc->saved_xfer_mode[dev->devno] = 0; |
1256 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1257 | |
ba6a1308 | 1258 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1259 | } |
1260 | ||
022bdb07 TH |
1261 | /** |
1262 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1263 | * @link: target ATA link |
47005f25 | 1264 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1265 | * @action: action about to be performed |
1266 | * | |
1267 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1268 | * in @link->eh_info such that eh actions are not unnecessarily |
1269 | * repeated. | |
022bdb07 TH |
1270 | * |
1271 | * LOCKING: | |
1272 | * None. | |
1273 | */ | |
fb7fd614 TH |
1274 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1275 | unsigned int action) | |
022bdb07 | 1276 | { |
955e57df TH |
1277 | struct ata_port *ap = link->ap; |
1278 | struct ata_eh_info *ehi = &link->eh_info; | |
1279 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1280 | unsigned long flags; |
1281 | ||
ba6a1308 | 1282 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1283 | |
955e57df | 1284 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1285 | |
a568d1d2 TH |
1286 | /* About to take EH action, set RECOVERED. Ignore actions on |
1287 | * slave links as master will do them again. | |
1288 | */ | |
1289 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1290 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1291 | ||
ba6a1308 | 1292 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1293 | } |
1294 | ||
47005f25 TH |
1295 | /** |
1296 | * ata_eh_done - EH action complete | |
2f60e1ab | 1297 | * @link: ATA link for which EH actions are complete |
47005f25 TH |
1298 | * @dev: target ATA dev for per-dev action (can be NULL) |
1299 | * @action: action just completed | |
1300 | * | |
1301 | * Called right after performing EH actions to clear related bits | |
955e57df | 1302 | * in @link->eh_context. |
47005f25 TH |
1303 | * |
1304 | * LOCKING: | |
1305 | * None. | |
1306 | */ | |
fb7fd614 TH |
1307 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1308 | unsigned int action) | |
47005f25 | 1309 | { |
955e57df | 1310 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1311 | |
955e57df | 1312 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1313 | } |
1314 | ||
022bdb07 TH |
1315 | /** |
1316 | * ata_err_string - convert err_mask to descriptive string | |
1317 | * @err_mask: error mask to convert to string | |
1318 | * | |
1319 | * Convert @err_mask to descriptive string. Errors are | |
1320 | * prioritized according to severity and only the most severe | |
1321 | * error is reported. | |
1322 | * | |
1323 | * LOCKING: | |
1324 | * None. | |
1325 | * | |
1326 | * RETURNS: | |
1327 | * Descriptive string for @err_mask | |
1328 | */ | |
2dcb407e | 1329 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1330 | { |
1331 | if (err_mask & AC_ERR_HOST_BUS) | |
1332 | return "host bus error"; | |
1333 | if (err_mask & AC_ERR_ATA_BUS) | |
1334 | return "ATA bus error"; | |
1335 | if (err_mask & AC_ERR_TIMEOUT) | |
1336 | return "timeout"; | |
1337 | if (err_mask & AC_ERR_HSM) | |
1338 | return "HSM violation"; | |
1339 | if (err_mask & AC_ERR_SYSTEM) | |
1340 | return "internal error"; | |
1341 | if (err_mask & AC_ERR_MEDIA) | |
1342 | return "media error"; | |
1343 | if (err_mask & AC_ERR_INVALID) | |
1344 | return "invalid argument"; | |
1345 | if (err_mask & AC_ERR_DEV) | |
1346 | return "device error"; | |
54fb131b DLM |
1347 | if (err_mask & AC_ERR_NCQ) |
1348 | return "NCQ error"; | |
1349 | if (err_mask & AC_ERR_NODEV_HINT) | |
1350 | return "Polling detection error"; | |
022bdb07 TH |
1351 | return "unknown error"; |
1352 | } | |
1353 | ||
11fc33da TH |
1354 | /** |
1355 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1356 | * @dev: target ATAPI device | |
1357 | * @r_sense_key: out parameter for sense_key | |
1358 | * | |
1359 | * Perform ATAPI TEST_UNIT_READY. | |
1360 | * | |
1361 | * LOCKING: | |
1362 | * EH context (may sleep). | |
1363 | * | |
1364 | * RETURNS: | |
1365 | * 0 on success, AC_ERR_* mask on failure. | |
1366 | */ | |
3dc67440 | 1367 | unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) |
11fc33da TH |
1368 | { |
1369 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1370 | struct ata_taskfile tf; | |
1371 | unsigned int err_mask; | |
1372 | ||
1373 | ata_tf_init(dev, &tf); | |
1374 | ||
1375 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1376 | tf.command = ATA_CMD_PACKET; | |
1377 | tf.protocol = ATAPI_PROT_NODATA; | |
1378 | ||
1379 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1380 | if (err_mask == AC_ERR_DEV) | |
1381 | *r_sense_key = tf.feature >> 4; | |
1382 | return err_mask; | |
1383 | } | |
1384 | ||
e87fd28c HR |
1385 | /** |
1386 | * ata_eh_request_sense - perform REQUEST_SENSE_DATA_EXT | |
2f60e1ab | 1387 | * @qc: qc to perform REQUEST_SENSE_SENSE_DATA_EXT to |
e87fd28c HR |
1388 | * @cmd: scsi command for which the sense code should be set |
1389 | * | |
1390 | * Perform REQUEST_SENSE_DATA_EXT after the device reported CHECK | |
1391 | * SENSE. This function is an EH helper. | |
1392 | * | |
1393 | * LOCKING: | |
1394 | * Kernel thread context (may sleep). | |
1395 | */ | |
1396 | static void ata_eh_request_sense(struct ata_queued_cmd *qc, | |
1397 | struct scsi_cmnd *cmd) | |
1398 | { | |
1399 | struct ata_device *dev = qc->dev; | |
1400 | struct ata_taskfile tf; | |
1401 | unsigned int err_mask; | |
1402 | ||
1403 | if (qc->ap->pflags & ATA_PFLAG_FROZEN) { | |
1404 | ata_dev_warn(dev, "sense data available but port frozen\n"); | |
1405 | return; | |
1406 | } | |
1407 | ||
d238ffd5 | 1408 | if (!cmd || qc->flags & ATA_QCFLAG_SENSE_VALID) |
e87fd28c HR |
1409 | return; |
1410 | ||
1411 | if (!ata_id_sense_reporting_enabled(dev->id)) { | |
1412 | ata_dev_warn(qc->dev, "sense data reporting disabled\n"); | |
1413 | return; | |
1414 | } | |
1415 | ||
1416 | DPRINTK("ATA request sense\n"); | |
1417 | ||
1418 | ata_tf_init(dev, &tf); | |
1419 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1420 | tf.flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
1421 | tf.command = ATA_CMD_REQ_SENSE_DATA; | |
1422 | tf.protocol = ATA_PROT_NODATA; | |
1423 | ||
1424 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
1425 | /* Ignore err_mask; ATA_ERR might be set */ | |
1426 | if (tf.command & ATA_SENSE) { | |
06dbde5f | 1427 | ata_scsi_set_sense(dev, cmd, tf.lbah, tf.lbam, tf.lbal); |
e87fd28c HR |
1428 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
1429 | } else { | |
1430 | ata_dev_warn(dev, "request sense failed stat %02x emask %x\n", | |
1431 | tf.command, err_mask); | |
1432 | } | |
1433 | } | |
1434 | ||
022bdb07 TH |
1435 | /** |
1436 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1437 | * @dev: device to perform REQUEST_SENSE to | |
1438 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1439 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1440 | * |
1441 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1442 | * SENSE. This function is EH helper. | |
1443 | * | |
1444 | * LOCKING: | |
1445 | * Kernel thread context (may sleep). | |
1446 | * | |
1447 | * RETURNS: | |
1448 | * 0 on success, AC_ERR_* mask on failure | |
1449 | */ | |
3dc67440 | 1450 | unsigned int atapi_eh_request_sense(struct ata_device *dev, |
3eabddb8 | 1451 | u8 *sense_buf, u8 dfl_sense_key) |
022bdb07 | 1452 | { |
3eabddb8 TH |
1453 | u8 cdb[ATAPI_CDB_LEN] = |
1454 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1455 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1456 | struct ata_taskfile tf; |
022bdb07 TH |
1457 | |
1458 | DPRINTK("ATAPI request sense\n"); | |
1459 | ||
022bdb07 TH |
1460 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
1461 | ||
56287768 AL |
1462 | /* initialize sense_buf with the error register, |
1463 | * for the case where they are -not- overwritten | |
1464 | */ | |
022bdb07 | 1465 | sense_buf[0] = 0x70; |
3eabddb8 | 1466 | sense_buf[2] = dfl_sense_key; |
56287768 | 1467 | |
a617c09f | 1468 | /* some devices time out if garbage left in tf */ |
56287768 | 1469 | ata_tf_init(dev, &tf); |
022bdb07 | 1470 | |
022bdb07 TH |
1471 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1472 | tf.command = ATA_CMD_PACKET; | |
1473 | ||
1474 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1475 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1476 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1477 | tf.feature |= ATAPI_PKT_DMA; |
1478 | } else { | |
0dc36888 | 1479 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1480 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1481 | tf.lbah = 0; | |
022bdb07 TH |
1482 | } |
1483 | ||
1484 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1485 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1486 | } |
1487 | ||
1488 | /** | |
1489 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1490 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1491 | * |
1492 | * Analyze SError if available and further determine cause of | |
1493 | * failure. | |
1494 | * | |
1495 | * LOCKING: | |
1496 | * None. | |
1497 | */ | |
0260731f | 1498 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1499 | { |
0260731f | 1500 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1501 | u32 serror = ehc->i.serror; |
1502 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1503 | u32 hotplug_mask; |
022bdb07 | 1504 | |
e0614db2 | 1505 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1506 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1507 | action |= ATA_EH_RESET; |
022bdb07 TH |
1508 | } |
1509 | if (serror & SERR_PROTOCOL) { | |
1510 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1511 | action |= ATA_EH_RESET; |
022bdb07 TH |
1512 | } |
1513 | if (serror & SERR_INTERNAL) { | |
1514 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1515 | action |= ATA_EH_RESET; |
022bdb07 | 1516 | } |
f9df58cb TH |
1517 | |
1518 | /* Determine whether a hotplug event has occurred. Both | |
1519 | * SError.N/X are considered hotplug events for enabled or | |
1520 | * host links. For disabled PMP links, only N bit is | |
1521 | * considered as X bit is left at 1 for link plugging. | |
1522 | */ | |
eb0e85e3 | 1523 | if (link->lpm_policy > ATA_LPM_MAX_POWER) |
6b7ae954 TH |
1524 | hotplug_mask = 0; /* hotplug doesn't work w/ LPM */ |
1525 | else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
f9df58cb TH |
1526 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
1527 | else | |
1528 | hotplug_mask = SERR_PHYRDY_CHG; | |
1529 | ||
1530 | if (serror & hotplug_mask) | |
084fe639 | 1531 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1532 | |
1533 | ehc->i.err_mask |= err_mask; | |
1534 | ehc->i.action |= action; | |
1535 | } | |
1536 | ||
1537 | /** | |
1538 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1539 | * @qc: qc to analyze | |
1540 | * @tf: Taskfile registers to analyze | |
1541 | * | |
1542 | * Analyze taskfile of @qc and further determine cause of | |
1543 | * failure. This function also requests ATAPI sense data if | |
25985edc | 1544 | * available. |
022bdb07 TH |
1545 | * |
1546 | * LOCKING: | |
1547 | * Kernel thread context (may sleep). | |
1548 | * | |
1549 | * RETURNS: | |
1550 | * Determined recovery action | |
1551 | */ | |
1552 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1553 | const struct ata_taskfile *tf) | |
1554 | { | |
1555 | unsigned int tmp, action = 0; | |
1556 | u8 stat = tf->command, err = tf->feature; | |
1557 | ||
1558 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1559 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1560 | return ATA_EH_RESET; |
022bdb07 TH |
1561 | } |
1562 | ||
e87fd28c | 1563 | if (stat & (ATA_ERR | ATA_DF)) { |
a51d644a | 1564 | qc->err_mask |= AC_ERR_DEV; |
e87fd28c HR |
1565 | /* |
1566 | * Sense data reporting does not work if the | |
1567 | * device fault bit is set. | |
1568 | */ | |
1569 | if (stat & ATA_DF) | |
1570 | stat &= ~ATA_SENSE; | |
1571 | } else { | |
022bdb07 | 1572 | return 0; |
e87fd28c | 1573 | } |
022bdb07 TH |
1574 | |
1575 | switch (qc->dev->class) { | |
9162c657 | 1576 | case ATA_DEV_ZAC: |
e87fd28c HR |
1577 | if (stat & ATA_SENSE) |
1578 | ata_eh_request_sense(qc, qc->scsicmd); | |
df561f66 | 1579 | fallthrough; |
ca156e00 | 1580 | case ATA_DEV_ATA: |
022bdb07 TH |
1581 | if (err & ATA_ICRC) |
1582 | qc->err_mask |= AC_ERR_ATA_BUS; | |
eec7e1c1 | 1583 | if (err & (ATA_UNC | ATA_AMNF)) |
022bdb07 TH |
1584 | qc->err_mask |= AC_ERR_MEDIA; |
1585 | if (err & ATA_IDNF) | |
1586 | qc->err_mask |= AC_ERR_INVALID; | |
1587 | break; | |
1588 | ||
1589 | case ATA_DEV_ATAPI: | |
a569a30d | 1590 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1591 | tmp = atapi_eh_request_sense(qc->dev, |
1592 | qc->scsicmd->sense_buffer, | |
1593 | qc->result_tf.feature >> 4); | |
3852e373 | 1594 | if (!tmp) |
a569a30d | 1595 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
3852e373 | 1596 | else |
a569a30d TH |
1597 | qc->err_mask |= tmp; |
1598 | } | |
022bdb07 TH |
1599 | } |
1600 | ||
3852e373 | 1601 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { |
b8e162f9 | 1602 | enum scsi_disposition ret = scsi_check_sense(qc->scsicmd); |
3852e373 | 1603 | /* |
79487259 | 1604 | * SUCCESS here means that the sense code could be |
3852e373 HR |
1605 | * evaluated and should be passed to the upper layers |
1606 | * for correct evaluation. | |
79487259 | 1607 | * FAILED means the sense code could not be interpreted |
3852e373 HR |
1608 | * and the device would need to be reset. |
1609 | * NEEDS_RETRY and ADD_TO_MLQUEUE means that the | |
1610 | * command would need to be retried. | |
1611 | */ | |
1612 | if (ret == NEEDS_RETRY || ret == ADD_TO_MLQUEUE) { | |
1613 | qc->flags |= ATA_QCFLAG_RETRY; | |
1614 | qc->err_mask |= AC_ERR_OTHER; | |
1615 | } else if (ret != SUCCESS) { | |
1616 | qc->err_mask |= AC_ERR_HSM; | |
1617 | } | |
1618 | } | |
022bdb07 | 1619 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) |
cf480626 | 1620 | action |= ATA_EH_RESET; |
022bdb07 TH |
1621 | |
1622 | return action; | |
1623 | } | |
1624 | ||
76326ac1 TH |
1625 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1626 | int *xfer_ok) | |
022bdb07 | 1627 | { |
76326ac1 TH |
1628 | int base = 0; |
1629 | ||
1630 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1631 | *xfer_ok = 1; | |
1632 | ||
1633 | if (!*xfer_ok) | |
75f9cafc | 1634 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1635 | |
7d47e8d4 | 1636 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1637 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1638 | |
7d47e8d4 | 1639 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1640 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1641 | |
3884f7b0 | 1642 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1643 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1644 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1645 | if ((err_mask & |
1646 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1647 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1648 | } |
1649 | ||
1650 | return 0; | |
1651 | } | |
1652 | ||
7d47e8d4 | 1653 | struct speed_down_verdict_arg { |
022bdb07 | 1654 | u64 since; |
76326ac1 | 1655 | int xfer_ok; |
3884f7b0 | 1656 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1657 | }; |
1658 | ||
7d47e8d4 | 1659 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1660 | { |
7d47e8d4 | 1661 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1662 | int cat; |
022bdb07 | 1663 | |
d9027470 | 1664 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since)) |
022bdb07 TH |
1665 | return -1; |
1666 | ||
76326ac1 TH |
1667 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1668 | &arg->xfer_ok); | |
7d47e8d4 | 1669 | arg->nr_errors[cat]++; |
76326ac1 | 1670 | |
022bdb07 TH |
1671 | return 0; |
1672 | } | |
1673 | ||
1674 | /** | |
7d47e8d4 | 1675 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1676 | * @dev: Device of interest |
1677 | * | |
1678 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1679 | * whether NCQ needs to be turned off, transfer speed should be |
1680 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1681 | * |
3884f7b0 TH |
1682 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1683 | * | |
1684 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1685 | * IO commands | |
1686 | * | |
1687 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1688 | * | |
76326ac1 TH |
1689 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1690 | * data transfer hasn't been verified. | |
1691 | * | |
3884f7b0 TH |
1692 | * Verdicts are |
1693 | * | |
1694 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1695 | * |
3884f7b0 TH |
1696 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1697 | * to PIO. | |
7d47e8d4 | 1698 | * |
3884f7b0 | 1699 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1700 | * |
3884f7b0 | 1701 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1702 | * taken per error. An action triggered by non-DUBIOUS errors |
1703 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1704 | * This is to expedite speed down decisions right after device is | |
1705 | * initially configured. | |
1706 | * | |
4091fb95 | 1707 | * The following are speed down rules. #1 and #2 deal with |
76326ac1 | 1708 | * DUBIOUS errors. |
7d47e8d4 | 1709 | * |
76326ac1 TH |
1710 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1711 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1712 | * | |
1713 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1714 | * occurred during last 5 mins, NCQ_OFF. | |
1715 | * | |
1716 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
25985edc | 1717 | * occurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1718 | * |
76326ac1 | 1719 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1720 | * during last 10 mins, NCQ_OFF. |
1721 | * | |
76326ac1 | 1722 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1723 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1724 | * |
022bdb07 TH |
1725 | * LOCKING: |
1726 | * Inherited from caller. | |
1727 | * | |
1728 | * RETURNS: | |
7d47e8d4 | 1729 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1730 | */ |
7d47e8d4 | 1731 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1732 | { |
7d47e8d4 TH |
1733 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1734 | u64 j64 = get_jiffies_64(); | |
1735 | struct speed_down_verdict_arg arg; | |
1736 | unsigned int verdict = 0; | |
022bdb07 | 1737 | |
3884f7b0 | 1738 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1739 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1740 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1741 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1742 | |
76326ac1 TH |
1743 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1744 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1745 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1746 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1747 | ||
1748 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1749 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1750 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1751 | ||
3884f7b0 TH |
1752 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1753 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1754 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1755 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1756 | |
3884f7b0 | 1757 | /* scan past 10 mins of error history */ |
022bdb07 | 1758 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1759 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1760 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1761 | |
3884f7b0 TH |
1762 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1763 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1764 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1765 | ||
1766 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1767 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1768 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1769 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1770 | |
7d47e8d4 | 1771 | return verdict; |
022bdb07 TH |
1772 | } |
1773 | ||
1774 | /** | |
1775 | * ata_eh_speed_down - record error and speed down if necessary | |
1776 | * @dev: Failed device | |
3884f7b0 | 1777 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1778 | * @err_mask: err_mask of the error |
1779 | * | |
1780 | * Record error and examine error history to determine whether | |
1781 | * adjusting transmission speed is necessary. It also sets | |
1782 | * transmission limits appropriately if such adjustment is | |
1783 | * necessary. | |
1784 | * | |
1785 | * LOCKING: | |
1786 | * Kernel thread context (may sleep). | |
1787 | * | |
1788 | * RETURNS: | |
7d47e8d4 | 1789 | * Determined recovery action. |
022bdb07 | 1790 | */ |
3884f7b0 TH |
1791 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1792 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1793 | { |
b1c72916 | 1794 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 1795 | int xfer_ok = 0; |
7d47e8d4 TH |
1796 | unsigned int verdict; |
1797 | unsigned int action = 0; | |
1798 | ||
1799 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1800 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1801 | return 0; |
1802 | ||
1803 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1804 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1805 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1806 | |
7d47e8d4 TH |
1807 | /* turn off NCQ? */ |
1808 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1809 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1810 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1811 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
a9a79dfe | 1812 | ata_dev_warn(dev, "NCQ disabled due to excessive errors\n"); |
7d47e8d4 TH |
1813 | goto done; |
1814 | } | |
022bdb07 | 1815 | |
7d47e8d4 TH |
1816 | /* speed down? */ |
1817 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1818 | /* speed down SATA link speed if possible */ | |
a07d499b | 1819 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 1820 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1821 | goto done; |
1822 | } | |
022bdb07 | 1823 | |
7d47e8d4 TH |
1824 | /* lower transfer mode */ |
1825 | if (dev->spdn_cnt < 2) { | |
1826 | static const int dma_dnxfer_sel[] = | |
1827 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1828 | static const int pio_dnxfer_sel[] = | |
1829 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1830 | int sel; | |
1831 | ||
1832 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1833 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1834 | else | |
1835 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1836 | ||
1837 | dev->spdn_cnt++; | |
1838 | ||
1839 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1840 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1841 | goto done; |
1842 | } | |
1843 | } | |
1844 | } | |
1845 | ||
1846 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1847 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1848 | */ |
1849 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1850 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1851 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1852 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1853 | dev->spdn_cnt = 0; | |
cf480626 | 1854 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1855 | goto done; |
1856 | } | |
1857 | } | |
022bdb07 | 1858 | |
022bdb07 | 1859 | return 0; |
7d47e8d4 TH |
1860 | done: |
1861 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1862 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1863 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1864 | return action; |
022bdb07 TH |
1865 | } |
1866 | ||
8d899e70 ML |
1867 | /** |
1868 | * ata_eh_worth_retry - analyze error and decide whether to retry | |
1869 | * @qc: qc to possibly retry | |
1870 | * | |
1871 | * Look at the cause of the error and decide if a retry | |
1872 | * might be useful or not. We don't want to retry media errors | |
1873 | * because the drive itself has probably already taken 10-30 seconds | |
1874 | * doing its own internal retries before reporting the failure. | |
1875 | */ | |
1876 | static inline int ata_eh_worth_retry(struct ata_queued_cmd *qc) | |
1877 | { | |
1eaca39a | 1878 | if (qc->err_mask & AC_ERR_MEDIA) |
8d899e70 ML |
1879 | return 0; /* don't retry media errors */ |
1880 | if (qc->flags & ATA_QCFLAG_IO) | |
1881 | return 1; /* otherwise retry anything from fs stack */ | |
1882 | if (qc->err_mask & AC_ERR_INVALID) | |
1883 | return 0; /* don't retry these */ | |
1884 | return qc->err_mask != AC_ERR_DEV; /* retry if not dev error */ | |
1885 | } | |
1886 | ||
7eb49509 DLM |
1887 | /** |
1888 | * ata_eh_quiet - check if we need to be quiet about a command error | |
1889 | * @qc: qc to check | |
1890 | * | |
1891 | * Look at the qc flags anbd its scsi command request flags to determine | |
1892 | * if we need to be quiet about the command failure. | |
1893 | */ | |
1894 | static inline bool ata_eh_quiet(struct ata_queued_cmd *qc) | |
1895 | { | |
1896 | if (qc->scsicmd && | |
1897 | qc->scsicmd->request->rq_flags & RQF_QUIET) | |
1898 | qc->flags |= ATA_QCFLAG_QUIET; | |
1899 | return qc->flags & ATA_QCFLAG_QUIET; | |
1900 | } | |
1901 | ||
022bdb07 | 1902 | /** |
9b1e2658 TH |
1903 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1904 | * @link: host link to perform autopsy on | |
022bdb07 | 1905 | * |
0260731f TH |
1906 | * Analyze why @link failed and determine which recovery actions |
1907 | * are needed. This function also sets more detailed AC_ERR_* | |
1908 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1909 | * |
1910 | * LOCKING: | |
1911 | * Kernel thread context (may sleep). | |
1912 | */ | |
9b1e2658 | 1913 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1914 | { |
0260731f | 1915 | struct ata_port *ap = link->ap; |
936fd732 | 1916 | struct ata_eh_context *ehc = &link->eh_context; |
258c4e5c | 1917 | struct ata_queued_cmd *qc; |
dfcc173d | 1918 | struct ata_device *dev; |
3884f7b0 | 1919 | unsigned int all_err_mask = 0, eflags = 0; |
7eb49509 | 1920 | int tag, nr_failed = 0, nr_quiet = 0; |
022bdb07 TH |
1921 | u32 serror; |
1922 | int rc; | |
1923 | ||
1924 | DPRINTK("ENTER\n"); | |
1925 | ||
1cdaf534 TH |
1926 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1927 | return; | |
1928 | ||
022bdb07 | 1929 | /* obtain and analyze SError */ |
936fd732 | 1930 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1931 | if (rc == 0) { |
1932 | ehc->i.serror |= serror; | |
0260731f | 1933 | ata_eh_analyze_serror(link); |
4e57c517 | 1934 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 1935 | /* SError read failed, force reset and probing */ |
b558eddd | 1936 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 1937 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
1938 | ehc->i.err_mask |= AC_ERR_OTHER; |
1939 | } | |
022bdb07 | 1940 | |
e8ee8451 | 1941 | /* analyze NCQ failure */ |
0260731f | 1942 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 1943 | |
022bdb07 TH |
1944 | /* any real error trumps AC_ERR_OTHER */ |
1945 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
1946 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
1947 | ||
1948 | all_err_mask |= ehc->i.err_mask; | |
1949 | ||
258c4e5c | 1950 | ata_qc_for_each_raw(ap, qc, tag) { |
b1c72916 TH |
1951 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
1952 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
1953 | continue; |
1954 | ||
1955 | /* inherit upper level err_mask */ | |
1956 | qc->err_mask |= ehc->i.err_mask; | |
1957 | ||
022bdb07 | 1958 | /* analyze TF */ |
4528e4da | 1959 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
1960 | |
1961 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
1962 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
1963 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
1964 | AC_ERR_INVALID); | |
1965 | ||
1966 | /* any real error trumps unknown error */ | |
1967 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1968 | qc->err_mask &= ~AC_ERR_OTHER; | |
1969 | ||
804689ad DLM |
1970 | /* |
1971 | * SENSE_VALID trumps dev/unknown error and revalidation. Upper | |
1972 | * layers will determine whether the command is worth retrying | |
1973 | * based on the sense data and device class/type. Otherwise, | |
1974 | * determine directly if the command is worth retrying using its | |
1975 | * error mask and flags. | |
1976 | */ | |
f90f0828 | 1977 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 1978 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
804689ad | 1979 | else if (ata_eh_worth_retry(qc)) |
03faab78 TH |
1980 | qc->flags |= ATA_QCFLAG_RETRY; |
1981 | ||
022bdb07 | 1982 | /* accumulate error info */ |
4528e4da | 1983 | ehc->i.dev = qc->dev; |
022bdb07 TH |
1984 | all_err_mask |= qc->err_mask; |
1985 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 1986 | eflags |= ATA_EFLAG_IS_IO; |
255c03d1 | 1987 | trace_ata_eh_link_autopsy_qc(qc); |
7eb49509 DLM |
1988 | |
1989 | /* Count quiet errors */ | |
1990 | if (ata_eh_quiet(qc)) | |
1991 | nr_quiet++; | |
1992 | nr_failed++; | |
022bdb07 TH |
1993 | } |
1994 | ||
7eb49509 DLM |
1995 | /* If all failed commands requested silence, then be quiet */ |
1996 | if (nr_quiet == nr_failed) | |
1997 | ehc->i.flags |= ATA_EHI_QUIET; | |
1998 | ||
a20f33ff | 1999 | /* enforce default EH actions */ |
b51e9e5d | 2000 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 2001 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2002 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2003 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2004 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2005 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2006 | |
dfcc173d TH |
2007 | /* If we have offending qcs and the associated failed device, |
2008 | * perform per-dev EH action only on the offending device. | |
2009 | */ | |
4528e4da | 2010 | if (ehc->i.dev) { |
4528e4da TH |
2011 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2012 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2013 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2014 | } |
2015 | ||
2695e366 TH |
2016 | /* propagate timeout to host link */ |
2017 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2018 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2019 | ||
2020 | /* record error and consider speeding down */ | |
dfcc173d | 2021 | dev = ehc->i.dev; |
2695e366 TH |
2022 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2023 | ata_dev_enabled(link->device)))) | |
2024 | dev = link->device; | |
dfcc173d | 2025 | |
76326ac1 TH |
2026 | if (dev) { |
2027 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2028 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2029 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
f1601113 | 2030 | trace_ata_eh_link_autopsy(dev, ehc->i.action, all_err_mask); |
76326ac1 | 2031 | } |
022bdb07 TH |
2032 | DPRINTK("EXIT\n"); |
2033 | } | |
2034 | ||
2035 | /** | |
9b1e2658 TH |
2036 | * ata_eh_autopsy - analyze error and determine recovery action |
2037 | * @ap: host port to perform autopsy on | |
2038 | * | |
2039 | * Analyze all links of @ap and determine why they failed and | |
2040 | * which recovery actions are needed. | |
2041 | * | |
2042 | * LOCKING: | |
2043 | * Kernel thread context (may sleep). | |
2044 | */ | |
fb7fd614 | 2045 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2046 | { |
2047 | struct ata_link *link; | |
2048 | ||
1eca4365 | 2049 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2050 | ata_eh_link_autopsy(link); |
2695e366 | 2051 | |
b1c72916 TH |
2052 | /* Handle the frigging slave link. Autopsy is done similarly |
2053 | * but actions and flags are transferred over to the master | |
2054 | * link and handled from there. | |
2055 | */ | |
2056 | if (ap->slave_link) { | |
2057 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2058 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2059 | ||
848e4c68 TH |
2060 | /* transfer control flags from master to slave */ |
2061 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2062 | ||
2063 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2064 | ata_eh_link_autopsy(ap->slave_link); |
2065 | ||
848e4c68 | 2066 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2067 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2068 | mehc->i.action |= sehc->i.action; | |
2069 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2070 | mehc->i.flags |= sehc->i.flags; | |
2071 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2072 | } | |
2073 | ||
2695e366 TH |
2074 | /* Autopsy of fanout ports can affect host link autopsy. |
2075 | * Perform host link autopsy last. | |
2076 | */ | |
071f44b1 | 2077 | if (sata_pmp_attached(ap)) |
2695e366 | 2078 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2079 | } |
2080 | ||
6521148c RH |
2081 | /** |
2082 | * ata_get_cmd_descript - get description for ATA command | |
2083 | * @command: ATA command code to get description for | |
2084 | * | |
2085 | * Return a textual description of the given command, or NULL if the | |
2086 | * command is not known. | |
2087 | * | |
2088 | * LOCKING: | |
2089 | * None | |
2090 | */ | |
2091 | const char *ata_get_cmd_descript(u8 command) | |
2092 | { | |
2093 | #ifdef CONFIG_ATA_VERBOSE_ERROR | |
2094 | static const struct | |
2095 | { | |
2096 | u8 command; | |
2097 | const char *text; | |
2098 | } cmd_descr[] = { | |
2099 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, | |
825e2d87 HR |
2100 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, |
2101 | { ATA_CMD_STANDBY, "STANDBY" }, | |
2102 | { ATA_CMD_IDLE, "IDLE" }, | |
2103 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, | |
2104 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, | |
3915c3b5 | 2105 | { ATA_CMD_DOWNLOAD_MICRO_DMA, "DOWNLOAD MICROCODE DMA" }, |
6521148c | 2106 | { ATA_CMD_NOP, "NOP" }, |
825e2d87 HR |
2107 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, |
2108 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, | |
2109 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, | |
2110 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, | |
2111 | { ATA_CMD_SERVICE, "SERVICE" }, | |
2112 | { ATA_CMD_READ, "READ DMA" }, | |
2113 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, | |
2114 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, | |
2115 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, | |
6521148c | 2116 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, |
825e2d87 HR |
2117 | { ATA_CMD_WRITE, "WRITE DMA" }, |
2118 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, | |
2119 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, | |
2120 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, | |
6521148c RH |
2121 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, |
2122 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, | |
2123 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, | |
2124 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, | |
2125 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, | |
3915c3b5 RH |
2126 | { ATA_CMD_FPDMA_SEND, "SEND FPDMA QUEUED" }, |
2127 | { ATA_CMD_FPDMA_RECV, "RECEIVE FPDMA QUEUED" }, | |
6521148c RH |
2128 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, |
2129 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, | |
2130 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, | |
2131 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, | |
2132 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, | |
2133 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, | |
2134 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, | |
2135 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, | |
825e2d87 | 2136 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, |
6521148c RH |
2137 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, |
2138 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, | |
2139 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, | |
2140 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, | |
2141 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, | |
2142 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, | |
2143 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, | |
2144 | { ATA_CMD_SLEEP, "SLEEP" }, | |
2145 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, | |
2146 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, | |
2147 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, | |
2148 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, | |
2149 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, | |
2150 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, | |
2151 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, | |
2152 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, | |
825e2d87 | 2153 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, |
3915c3b5 | 2154 | { ATA_CMD_TRUSTED_NONDATA, "TRUSTED NON-DATA" }, |
6521148c | 2155 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, |
825e2d87 | 2156 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, |
6521148c | 2157 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, |
825e2d87 | 2158 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, |
6521148c | 2159 | { ATA_CMD_PMP_READ, "READ BUFFER" }, |
3915c3b5 | 2160 | { ATA_CMD_PMP_READ_DMA, "READ BUFFER DMA" }, |
6521148c | 2161 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, |
3915c3b5 | 2162 | { ATA_CMD_PMP_WRITE_DMA, "WRITE BUFFER DMA" }, |
6521148c RH |
2163 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, |
2164 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, | |
2165 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, | |
2166 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, | |
2167 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, | |
2168 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, | |
2169 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, | |
2170 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, | |
2171 | { ATA_CMD_SMART, "SMART" }, | |
2172 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, | |
2173 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, | |
acad7627 | 2174 | { ATA_CMD_DSM, "DATA SET MANAGEMENT" }, |
825e2d87 HR |
2175 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, |
2176 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, | |
6521148c RH |
2177 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, |
2178 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, | |
2179 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, | |
825e2d87 | 2180 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, |
3915c3b5 RH |
2181 | { ATA_CMD_REQ_SENSE_DATA, "REQUEST SENSE DATA EXT" }, |
2182 | { ATA_CMD_SANITIZE_DEVICE, "SANITIZE DEVICE" }, | |
28a3fc22 | 2183 | { ATA_CMD_ZAC_MGMT_IN, "ZAC MANAGEMENT IN" }, |
27708a95 | 2184 | { ATA_CMD_ZAC_MGMT_OUT, "ZAC MANAGEMENT OUT" }, |
6521148c RH |
2185 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, |
2186 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, | |
2187 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, | |
2188 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, | |
2189 | { ATA_CMD_RESTORE, "RECALIBRATE" }, | |
2190 | { 0, NULL } /* terminate list */ | |
2191 | }; | |
2192 | ||
2193 | unsigned int i; | |
2194 | for (i = 0; cmd_descr[i].text; i++) | |
2195 | if (cmd_descr[i].command == command) | |
2196 | return cmd_descr[i].text; | |
2197 | #endif | |
2198 | ||
2199 | return NULL; | |
2200 | } | |
36aae28e | 2201 | EXPORT_SYMBOL_GPL(ata_get_cmd_descript); |
6521148c | 2202 | |
9b1e2658 TH |
2203 | /** |
2204 | * ata_eh_link_report - report error handling to user | |
0260731f | 2205 | * @link: ATA link EH is going on |
022bdb07 TH |
2206 | * |
2207 | * Report EH to user. | |
2208 | * | |
2209 | * LOCKING: | |
2210 | * None. | |
2211 | */ | |
9b1e2658 | 2212 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2213 | { |
0260731f TH |
2214 | struct ata_port *ap = link->ap; |
2215 | struct ata_eh_context *ehc = &link->eh_context; | |
258c4e5c | 2216 | struct ata_queued_cmd *qc; |
022bdb07 | 2217 | const char *frozen, *desc; |
462098b0 | 2218 | char tries_buf[6] = ""; |
022bdb07 TH |
2219 | int tag, nr_failed = 0; |
2220 | ||
94ff3d54 TH |
2221 | if (ehc->i.flags & ATA_EHI_QUIET) |
2222 | return; | |
2223 | ||
022bdb07 TH |
2224 | desc = NULL; |
2225 | if (ehc->i.desc[0] != '\0') | |
2226 | desc = ehc->i.desc; | |
2227 | ||
258c4e5c | 2228 | ata_qc_for_each_raw(ap, qc, tag) { |
b1c72916 TH |
2229 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2230 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2231 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2232 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2233 | continue; |
2234 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2235 | continue; | |
2236 | ||
2237 | nr_failed++; | |
2238 | } | |
2239 | ||
2240 | if (!nr_failed && !ehc->i.err_mask) | |
2241 | return; | |
2242 | ||
2243 | frozen = ""; | |
b51e9e5d | 2244 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2245 | frozen = " frozen"; |
2246 | ||
a1e10f7e | 2247 | if (ap->eh_tries < ATA_EH_MAX_TRIES) |
462098b0 | 2248 | snprintf(tries_buf, sizeof(tries_buf), " t%d", |
a1e10f7e TH |
2249 | ap->eh_tries); |
2250 | ||
022bdb07 | 2251 | if (ehc->i.dev) { |
a9a79dfe JP |
2252 | ata_dev_err(ehc->i.dev, "exception Emask 0x%x " |
2253 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2254 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2255 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2256 | if (desc) |
a9a79dfe | 2257 | ata_dev_err(ehc->i.dev, "%s\n", desc); |
022bdb07 | 2258 | } else { |
a9a79dfe JP |
2259 | ata_link_err(link, "exception Emask 0x%x " |
2260 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2261 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2262 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2263 | if (desc) |
a9a79dfe | 2264 | ata_link_err(link, "%s\n", desc); |
022bdb07 TH |
2265 | } |
2266 | ||
6521148c | 2267 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2268 | if (ehc->i.serror) |
a9a79dfe | 2269 | ata_link_err(link, |
1333e194 RH |
2270 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2271 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2272 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2273 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2274 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2275 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2276 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2277 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2278 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2279 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2280 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2281 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2282 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2283 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2284 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2285 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2286 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2287 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
6521148c | 2288 | #endif |
1333e194 | 2289 | |
258c4e5c | 2290 | ata_qc_for_each_raw(ap, qc, tag) { |
8a937581 | 2291 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2292 | char data_buf[20] = ""; |
2293 | char cdb_buf[70] = ""; | |
022bdb07 | 2294 | |
0260731f | 2295 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2296 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2297 | continue; |
2298 | ||
abb6a889 TH |
2299 | if (qc->dma_dir != DMA_NONE) { |
2300 | static const char *dma_str[] = { | |
2301 | [DMA_BIDIRECTIONAL] = "bidi", | |
2302 | [DMA_TO_DEVICE] = "out", | |
2303 | [DMA_FROM_DEVICE] = "in", | |
2304 | }; | |
fb1b8b11 GU |
2305 | const char *prot_str = NULL; |
2306 | ||
2307 | switch (qc->tf.protocol) { | |
2308 | case ATA_PROT_UNKNOWN: | |
2309 | prot_str = "unknown"; | |
2310 | break; | |
2311 | case ATA_PROT_NODATA: | |
2312 | prot_str = "nodata"; | |
2313 | break; | |
2314 | case ATA_PROT_PIO: | |
2315 | prot_str = "pio"; | |
2316 | break; | |
2317 | case ATA_PROT_DMA: | |
2318 | prot_str = "dma"; | |
2319 | break; | |
2320 | case ATA_PROT_NCQ: | |
2321 | prot_str = "ncq dma"; | |
2322 | break; | |
2323 | case ATA_PROT_NCQ_NODATA: | |
2324 | prot_str = "ncq nodata"; | |
2325 | break; | |
2326 | case ATAPI_PROT_NODATA: | |
2327 | prot_str = "nodata"; | |
2328 | break; | |
2329 | case ATAPI_PROT_PIO: | |
2330 | prot_str = "pio"; | |
2331 | break; | |
2332 | case ATAPI_PROT_DMA: | |
2333 | prot_str = "dma"; | |
2334 | break; | |
2335 | } | |
abb6a889 | 2336 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", |
fb1b8b11 | 2337 | prot_str, qc->nbytes, dma_str[qc->dma_dir]); |
abb6a889 TH |
2338 | } |
2339 | ||
6521148c | 2340 | if (ata_is_atapi(qc->tf.protocol)) { |
a13b0c9d HR |
2341 | const u8 *cdb = qc->cdb; |
2342 | size_t cdb_len = qc->dev->cdb_len; | |
2343 | ||
cbba5b0e HR |
2344 | if (qc->scsicmd) { |
2345 | cdb = qc->scsicmd->cmnd; | |
2346 | cdb_len = qc->scsicmd->cmd_len; | |
2347 | } | |
2348 | __scsi_format_command(cdb_buf, sizeof(cdb_buf), | |
2349 | cdb, cdb_len); | |
6521148c RH |
2350 | } else { |
2351 | const char *descr = ata_get_cmd_descript(cmd->command); | |
2352 | if (descr) | |
a9a79dfe JP |
2353 | ata_dev_err(qc->dev, "failed command: %s\n", |
2354 | descr); | |
6521148c | 2355 | } |
abb6a889 | 2356 | |
a9a79dfe | 2357 | ata_dev_err(qc->dev, |
8a937581 | 2358 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
abb6a889 | 2359 | "tag %d%s\n %s" |
8a937581 | 2360 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2361 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2362 | cmd->command, cmd->feature, cmd->nsect, |
2363 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2364 | cmd->hob_feature, cmd->hob_nsect, | |
2365 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2366 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2367 | res->command, res->feature, res->nsect, |
2368 | res->lbal, res->lbam, res->lbah, | |
2369 | res->hob_feature, res->hob_nsect, | |
2370 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2371 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2372 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 | 2373 | |
6521148c | 2374 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2375 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
e87fd28c | 2376 | ATA_SENSE | ATA_ERR)) { |
1333e194 | 2377 | if (res->command & ATA_BUSY) |
a9a79dfe | 2378 | ata_dev_err(qc->dev, "status: { Busy }\n"); |
1333e194 | 2379 | else |
e87fd28c | 2380 | ata_dev_err(qc->dev, "status: { %s%s%s%s%s}\n", |
1333e194 RH |
2381 | res->command & ATA_DRDY ? "DRDY " : "", |
2382 | res->command & ATA_DF ? "DF " : "", | |
2383 | res->command & ATA_DRQ ? "DRQ " : "", | |
e87fd28c | 2384 | res->command & ATA_SENSE ? "SENSE " : "", |
2dcb407e | 2385 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2386 | } |
2387 | ||
2388 | if (cmd->command != ATA_CMD_PACKET && | |
eec7e1c1 AA |
2389 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_AMNF | |
2390 | ATA_IDNF | ATA_ABORTED))) | |
2391 | ata_dev_err(qc->dev, "error: { %s%s%s%s%s}\n", | |
1333e194 RH |
2392 | res->feature & ATA_ICRC ? "ICRC " : "", |
2393 | res->feature & ATA_UNC ? "UNC " : "", | |
eec7e1c1 | 2394 | res->feature & ATA_AMNF ? "AMNF " : "", |
1333e194 | 2395 | res->feature & ATA_IDNF ? "IDNF " : "", |
2dcb407e | 2396 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
6521148c | 2397 | #endif |
022bdb07 TH |
2398 | } |
2399 | } | |
2400 | ||
9b1e2658 TH |
2401 | /** |
2402 | * ata_eh_report - report error handling to user | |
2403 | * @ap: ATA port to report EH about | |
2404 | * | |
2405 | * Report EH to user. | |
2406 | * | |
2407 | * LOCKING: | |
2408 | * None. | |
2409 | */ | |
fb7fd614 | 2410 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2411 | { |
2412 | struct ata_link *link; | |
2413 | ||
1eca4365 | 2414 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2415 | ata_eh_link_report(link); |
2416 | } | |
2417 | ||
cc0680a5 | 2418 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2419 | unsigned int *classes, unsigned long deadline, |
2420 | bool clear_classes) | |
d87fa38e | 2421 | { |
f58229f8 | 2422 | struct ata_device *dev; |
d87fa38e | 2423 | |
b1c72916 | 2424 | if (clear_classes) |
1eca4365 | 2425 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2426 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2427 | |
f046519f | 2428 | return reset(link, classes, deadline); |
d87fa38e TH |
2429 | } |
2430 | ||
e8411fba | 2431 | static int ata_eh_followup_srst_needed(struct ata_link *link, int rc) |
664faf09 | 2432 | { |
45db2f6c | 2433 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2434 | return 0; |
5dbfc9cb TH |
2435 | if (rc == -EAGAIN) |
2436 | return 1; | |
071f44b1 | 2437 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2438 | return 1; |
664faf09 TH |
2439 | return 0; |
2440 | } | |
2441 | ||
fb7fd614 TH |
2442 | int ata_eh_reset(struct ata_link *link, int classify, |
2443 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2444 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2445 | { |
afaa5c37 | 2446 | struct ata_port *ap = link->ap; |
b1c72916 | 2447 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2448 | struct ata_eh_context *ehc = &link->eh_context; |
705d2014 | 2449 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
664faf09 | 2450 | unsigned int *classes = ehc->classes; |
416dc9ed | 2451 | unsigned int lflags = link->flags; |
1cdaf534 | 2452 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2453 | int max_tries = 0, try = 0; |
b1c72916 | 2454 | struct ata_link *failed_link; |
f58229f8 | 2455 | struct ata_device *dev; |
416dc9ed | 2456 | unsigned long deadline, now; |
022bdb07 | 2457 | ata_reset_fn_t reset; |
afaa5c37 | 2458 | unsigned long flags; |
416dc9ed | 2459 | u32 sstatus; |
b1c72916 | 2460 | int nr_unknown, rc; |
022bdb07 | 2461 | |
932648b0 TH |
2462 | /* |
2463 | * Prepare to reset | |
2464 | */ | |
d8af0eb6 TH |
2465 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2466 | max_tries++; | |
ca6d43b0 DW |
2467 | if (link->flags & ATA_LFLAG_RST_ONCE) |
2468 | max_tries = 1; | |
05944bdf TH |
2469 | if (link->flags & ATA_LFLAG_NO_HRST) |
2470 | hardreset = NULL; | |
2471 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2472 | softreset = NULL; | |
d8af0eb6 | 2473 | |
25985edc | 2474 | /* make sure each reset attempt is at least COOL_DOWN apart */ |
19b72321 TH |
2475 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
2476 | now = jiffies; | |
2477 | WARN_ON(time_after(ehc->last_reset, now)); | |
2478 | deadline = ata_deadline(ehc->last_reset, | |
2479 | ATA_EH_RESET_COOL_DOWN); | |
2480 | if (time_before(now, deadline)) | |
2481 | schedule_timeout_uninterruptible(deadline - now); | |
2482 | } | |
0a2c0f56 | 2483 | |
afaa5c37 TH |
2484 | spin_lock_irqsave(ap->lock, flags); |
2485 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2486 | spin_unlock_irqrestore(ap->lock, flags); | |
2487 | ||
cf480626 | 2488 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2489 | |
1eca4365 | 2490 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2491 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2492 | * may change configuration and be in PIO0 timing. If | |
2493 | * we do a hard reset (or are coming from power on) | |
2494 | * this is true for ATA or ATAPI. Until we've set a | |
2495 | * suitable controller mode we should not touch the | |
2496 | * bus as we may be talking too fast. | |
2497 | */ | |
2498 | dev->pio_mode = XFER_PIO_0; | |
5416912a | 2499 | dev->dma_mode = 0xff; |
cdeab114 TH |
2500 | |
2501 | /* If the controller has a pio mode setup function | |
2502 | * then use it to set the chipset to rights. Don't | |
2503 | * touch the DMA setup as that will be dealt with when | |
2504 | * configuring devices. | |
2505 | */ | |
2506 | if (ap->ops->set_piomode) | |
2507 | ap->ops->set_piomode(ap, dev); | |
2508 | } | |
2509 | ||
cf480626 | 2510 | /* prefer hardreset */ |
932648b0 | 2511 | reset = NULL; |
cf480626 TH |
2512 | ehc->i.action &= ~ATA_EH_RESET; |
2513 | if (hardreset) { | |
2514 | reset = hardreset; | |
a674050e | 2515 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2516 | } else if (softreset) { |
cf480626 | 2517 | reset = softreset; |
a674050e | 2518 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2519 | } |
f5914a46 TH |
2520 | |
2521 | if (prereset) { | |
b1c72916 TH |
2522 | unsigned long deadline = ata_deadline(jiffies, |
2523 | ATA_EH_PRERESET_TIMEOUT); | |
2524 | ||
2525 | if (slave) { | |
2526 | sehc->i.action &= ~ATA_EH_RESET; | |
2527 | sehc->i.action |= ehc->i.action; | |
2528 | } | |
2529 | ||
2530 | rc = prereset(link, deadline); | |
2531 | ||
2532 | /* If present, do prereset on slave link too. Reset | |
2533 | * is skipped iff both master and slave links report | |
2534 | * -ENOENT or clear ATA_EH_RESET. | |
2535 | */ | |
2536 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2537 | int tmp; | |
2538 | ||
2539 | tmp = prereset(slave, deadline); | |
2540 | if (tmp != -ENOENT) | |
2541 | rc = tmp; | |
2542 | ||
2543 | ehc->i.action |= sehc->i.action; | |
2544 | } | |
2545 | ||
f5914a46 | 2546 | if (rc) { |
c961922b | 2547 | if (rc == -ENOENT) { |
a9a79dfe | 2548 | ata_link_dbg(link, "port disabled--ignoring\n"); |
cf480626 | 2549 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2550 | |
1eca4365 | 2551 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2552 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2553 | |
2554 | rc = 0; | |
c961922b | 2555 | } else |
a9a79dfe JP |
2556 | ata_link_err(link, |
2557 | "prereset failed (errno=%d)\n", | |
2558 | rc); | |
fccb6ea5 | 2559 | goto out; |
f5914a46 | 2560 | } |
f5914a46 | 2561 | |
932648b0 | 2562 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2563 | * bang classes, thaw and return. |
932648b0 TH |
2564 | */ |
2565 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2566 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2567 | classes[dev->devno] = ATA_DEV_NONE; |
d6515e6f TH |
2568 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
2569 | ata_is_host_link(link)) | |
2570 | ata_eh_thaw_port(ap); | |
932648b0 TH |
2571 | rc = 0; |
2572 | goto out; | |
2573 | } | |
f5914a46 TH |
2574 | } |
2575 | ||
022bdb07 | 2576 | retry: |
932648b0 TH |
2577 | /* |
2578 | * Perform reset | |
2579 | */ | |
dc98c32c TH |
2580 | if (ata_is_host_link(link)) |
2581 | ata_eh_freeze_port(ap); | |
2582 | ||
341c2c95 | 2583 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2584 | |
932648b0 TH |
2585 | if (reset) { |
2586 | if (verbose) | |
a9a79dfe JP |
2587 | ata_link_info(link, "%s resetting link\n", |
2588 | reset == softreset ? "soft" : "hard"); | |
932648b0 TH |
2589 | |
2590 | /* mark that this EH session started with reset */ | |
19b72321 | 2591 | ehc->last_reset = jiffies; |
932648b0 TH |
2592 | if (reset == hardreset) |
2593 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2594 | else | |
2595 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2596 | |
b1c72916 TH |
2597 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2598 | if (rc && rc != -EAGAIN) { | |
2599 | failed_link = link; | |
5dbfc9cb | 2600 | goto fail; |
b1c72916 TH |
2601 | } |
2602 | ||
2603 | /* hardreset slave link if existent */ | |
2604 | if (slave && reset == hardreset) { | |
2605 | int tmp; | |
2606 | ||
2607 | if (verbose) | |
a9a79dfe | 2608 | ata_link_info(slave, "hard resetting link\n"); |
b1c72916 TH |
2609 | |
2610 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2611 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2612 | false); | |
2613 | switch (tmp) { | |
2614 | case -EAGAIN: | |
2615 | rc = -EAGAIN; | |
e06abcc6 | 2616 | break; |
b1c72916 TH |
2617 | case 0: |
2618 | break; | |
2619 | default: | |
2620 | failed_link = slave; | |
2621 | rc = tmp; | |
2622 | goto fail; | |
2623 | } | |
2624 | } | |
022bdb07 | 2625 | |
b1c72916 | 2626 | /* perform follow-up SRST if necessary */ |
932648b0 | 2627 | if (reset == hardreset && |
e8411fba | 2628 | ata_eh_followup_srst_needed(link, rc)) { |
932648b0 | 2629 | reset = softreset; |
022bdb07 | 2630 | |
932648b0 | 2631 | if (!reset) { |
a9a79dfe JP |
2632 | ata_link_err(link, |
2633 | "follow-up softreset required but no softreset available\n"); | |
b1c72916 | 2634 | failed_link = link; |
932648b0 TH |
2635 | rc = -EINVAL; |
2636 | goto fail; | |
2637 | } | |
664faf09 | 2638 | |
932648b0 | 2639 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2640 | rc = ata_do_reset(link, reset, classes, deadline, true); |
fe2c4d01 TH |
2641 | if (rc) { |
2642 | failed_link = link; | |
2643 | goto fail; | |
2644 | } | |
664faf09 | 2645 | } |
932648b0 TH |
2646 | } else { |
2647 | if (verbose) | |
a9a79dfe JP |
2648 | ata_link_info(link, |
2649 | "no reset method available, skipping reset\n"); | |
932648b0 TH |
2650 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) |
2651 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2652 | } |
2653 | ||
932648b0 TH |
2654 | /* |
2655 | * Post-reset processing | |
2656 | */ | |
1eca4365 | 2657 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2658 | /* After the reset, the device state is PIO 0 and the |
2659 | * controller state is undefined. Reset also wakes up | |
2660 | * drives from sleeping mode. | |
2661 | */ | |
2662 | dev->pio_mode = XFER_PIO_0; | |
2663 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2664 | |
3b761d3d TH |
2665 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
2666 | continue; | |
2667 | ||
2668 | /* apply class override */ | |
2669 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2670 | classes[dev->devno] = ATA_DEV_ATA; | |
2671 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2672 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
022bdb07 TH |
2673 | } |
2674 | ||
416dc9ed TH |
2675 | /* record current link speed */ |
2676 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2677 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2678 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2679 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2680 | |
dc98c32c TH |
2681 | /* thaw the port */ |
2682 | if (ata_is_host_link(link)) | |
2683 | ata_eh_thaw_port(ap); | |
2684 | ||
f046519f TH |
2685 | /* postreset() should clear hardware SError. Although SError |
2686 | * is cleared during link resume, clearing SError here is | |
2687 | * necessary as some PHYs raise hotplug events after SRST. | |
2688 | * This introduces race condition where hotplug occurs between | |
2689 | * reset and here. This race is mediated by cross checking | |
2690 | * link onlineness and classification result later. | |
2691 | */ | |
b1c72916 | 2692 | if (postreset) { |
416dc9ed | 2693 | postreset(link, classes); |
b1c72916 TH |
2694 | if (slave) |
2695 | postreset(slave, classes); | |
2696 | } | |
20952b69 | 2697 | |
1e641060 | 2698 | /* |
8c56cacc TH |
2699 | * Some controllers can't be frozen very well and may set spurious |
2700 | * error conditions during reset. Clear accumulated error | |
2701 | * information and re-thaw the port if frozen. As reset is the | |
2702 | * final recovery action and we cross check link onlineness against | |
2703 | * device classification later, no hotplug event is lost by this. | |
1e641060 | 2704 | */ |
f046519f | 2705 | spin_lock_irqsave(link->ap->lock, flags); |
1e641060 | 2706 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
b1c72916 | 2707 | if (slave) |
1e641060 TH |
2708 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
2709 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
f046519f TH |
2710 | spin_unlock_irqrestore(link->ap->lock, flags); |
2711 | ||
8c56cacc TH |
2712 | if (ap->pflags & ATA_PFLAG_FROZEN) |
2713 | ata_eh_thaw_port(ap); | |
2714 | ||
3b761d3d TH |
2715 | /* |
2716 | * Make sure onlineness and classification result correspond. | |
f046519f TH |
2717 | * Hotplug could have happened during reset and some |
2718 | * controllers fail to wait while a drive is spinning up after | |
2719 | * being hotplugged causing misdetection. By cross checking | |
3b761d3d TH |
2720 | * link on/offlineness and classification result, those |
2721 | * conditions can be reliably detected and retried. | |
f046519f | 2722 | */ |
b1c72916 | 2723 | nr_unknown = 0; |
1eca4365 | 2724 | ata_for_each_dev(dev, link, ALL) { |
3b761d3d TH |
2725 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
2726 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe | 2727 | ata_dev_dbg(dev, "link online but device misclassified\n"); |
3b761d3d | 2728 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2729 | nr_unknown++; |
3b761d3d TH |
2730 | } |
2731 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { | |
2732 | if (ata_class_enabled(classes[dev->devno])) | |
a9a79dfe JP |
2733 | ata_dev_dbg(dev, |
2734 | "link offline, clearing class %d to NONE\n", | |
2735 | classes[dev->devno]); | |
3b761d3d TH |
2736 | classes[dev->devno] = ATA_DEV_NONE; |
2737 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe JP |
2738 | ata_dev_dbg(dev, |
2739 | "link status unknown, clearing UNKNOWN to NONE\n"); | |
3b761d3d | 2740 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2741 | } |
f046519f TH |
2742 | } |
2743 | ||
b1c72916 | 2744 | if (classify && nr_unknown) { |
f046519f | 2745 | if (try < max_tries) { |
a9a79dfe JP |
2746 | ata_link_warn(link, |
2747 | "link online but %d devices misclassified, retrying\n", | |
2748 | nr_unknown); | |
b1c72916 | 2749 | failed_link = link; |
f046519f TH |
2750 | rc = -EAGAIN; |
2751 | goto fail; | |
2752 | } | |
a9a79dfe JP |
2753 | ata_link_warn(link, |
2754 | "link online but %d devices misclassified, " | |
2755 | "device detection might fail\n", nr_unknown); | |
f046519f TH |
2756 | } |
2757 | ||
416dc9ed | 2758 | /* reset successful, schedule revalidation */ |
cf480626 | 2759 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2760 | if (slave) |
2761 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
6b7ae954 | 2762 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2763 | ehc->i.action |= ATA_EH_REVALIDATE; |
6b7ae954 | 2764 | link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */ |
ae791c05 | 2765 | |
416dc9ed | 2766 | rc = 0; |
fccb6ea5 TH |
2767 | out: |
2768 | /* clear hotplug flag */ | |
2769 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2770 | if (slave) |
2771 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2772 | |
2773 | spin_lock_irqsave(ap->lock, flags); | |
2774 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2775 | spin_unlock_irqrestore(ap->lock, flags); | |
2776 | ||
022bdb07 | 2777 | return rc; |
416dc9ed TH |
2778 | |
2779 | fail: | |
5958e302 TH |
2780 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2781 | if (!ata_is_host_link(link) && | |
2782 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2783 | rc = -ERESTART; | |
2784 | ||
7a46c078 | 2785 | if (try >= max_tries) { |
8ea7645c TH |
2786 | /* |
2787 | * Thaw host port even if reset failed, so that the port | |
2788 | * can be retried on the next phy event. This risks | |
2789 | * repeated EH runs but seems to be a better tradeoff than | |
2790 | * shutting down a port after a botched hotplug attempt. | |
2791 | */ | |
2792 | if (ata_is_host_link(link)) | |
2793 | ata_eh_thaw_port(ap); | |
416dc9ed | 2794 | goto out; |
8ea7645c | 2795 | } |
416dc9ed TH |
2796 | |
2797 | now = jiffies; | |
2798 | if (time_before(now, deadline)) { | |
2799 | unsigned long delta = deadline - now; | |
2800 | ||
a9a79dfe | 2801 | ata_link_warn(failed_link, |
0a2c0f56 TH |
2802 | "reset failed (errno=%d), retrying in %u secs\n", |
2803 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed | 2804 | |
c0c362b6 | 2805 | ata_eh_release(ap); |
416dc9ed TH |
2806 | while (delta) |
2807 | delta = schedule_timeout_uninterruptible(delta); | |
c0c362b6 | 2808 | ata_eh_acquire(ap); |
416dc9ed TH |
2809 | } |
2810 | ||
7a46c078 GG |
2811 | /* |
2812 | * While disks spinup behind PMP, some controllers fail sending SRST. | |
2813 | * They need to be reset - as well as the PMP - before retrying. | |
2814 | */ | |
2815 | if (rc == -ERESTART) { | |
2816 | if (ata_is_host_link(link)) | |
2817 | ata_eh_thaw_port(ap); | |
2818 | goto out; | |
2819 | } | |
2820 | ||
b1c72916 | 2821 | if (try == max_tries - 1) { |
a07d499b | 2822 | sata_down_spd_limit(link, 0); |
b1c72916 | 2823 | if (slave) |
a07d499b | 2824 | sata_down_spd_limit(slave, 0); |
b1c72916 | 2825 | } else if (rc == -EPIPE) |
a07d499b | 2826 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 2827 | |
416dc9ed TH |
2828 | if (hardreset) |
2829 | reset = hardreset; | |
2830 | goto retry; | |
022bdb07 TH |
2831 | } |
2832 | ||
45fabbb7 EO |
2833 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
2834 | { | |
2835 | struct ata_link *link; | |
2836 | struct ata_device *dev; | |
2837 | unsigned long flags; | |
2838 | ||
2839 | /* | |
2840 | * This function can be thought of as an extended version of | |
2841 | * ata_eh_about_to_do() specially crafted to accommodate the | |
2842 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
2843 | * does not leave the do {} while () loop in ata_eh_recover as | |
2844 | * long as the timeout for a park request to *one* device on | |
2845 | * the port has not expired, and since we still want to pick | |
2846 | * up park requests to other devices on the same port or | |
2847 | * timeout updates for the same device, we have to pull | |
2848 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
2849 | * ourselves at the beginning of each pass over the loop. | |
2850 | * | |
2851 | * Additionally, all write accesses to &ap->park_req_pending | |
16735d02 | 2852 | * through reinit_completion() (see below) or complete_all() |
45fabbb7 EO |
2853 | * (see ata_scsi_park_store()) are protected by the host lock. |
2854 | * As a result we have that park_req_pending.done is zero on | |
2855 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
2856 | * *all* devices on port ap have been pulled into the | |
2857 | * respective eh_context structs. If, and only if, | |
2858 | * park_req_pending.done is non-zero by the time we reach | |
2859 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
2860 | * has been scheduled for at least one of the devices on port | |
2861 | * ap and we have to cycle over the do {} while () loop in | |
2862 | * ata_eh_recover() again. | |
2863 | */ | |
2864 | ||
2865 | spin_lock_irqsave(ap->lock, flags); | |
16735d02 | 2866 | reinit_completion(&ap->park_req_pending); |
1eca4365 TH |
2867 | ata_for_each_link(link, ap, EDGE) { |
2868 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
2869 | struct ata_eh_info *ehi = &link->eh_info; |
2870 | ||
2871 | link->eh_context.i.dev_action[dev->devno] |= | |
2872 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
2873 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
2874 | } | |
2875 | } | |
2876 | spin_unlock_irqrestore(ap->lock, flags); | |
2877 | } | |
2878 | ||
2879 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
2880 | { | |
2881 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2882 | struct ata_taskfile tf; | |
2883 | unsigned int err_mask; | |
2884 | ||
2885 | ata_tf_init(dev, &tf); | |
2886 | if (park) { | |
2887 | ehc->unloaded_mask |= 1 << dev->devno; | |
2888 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
2889 | tf.feature = 0x44; | |
2890 | tf.lbal = 0x4c; | |
2891 | tf.lbam = 0x4e; | |
2892 | tf.lbah = 0x55; | |
2893 | } else { | |
2894 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2895 | tf.command = ATA_CMD_CHK_POWER; | |
2896 | } | |
2897 | ||
2898 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
bd18bc04 | 2899 | tf.protocol = ATA_PROT_NODATA; |
45fabbb7 EO |
2900 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
2901 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
a9a79dfe | 2902 | ata_dev_err(dev, "head unload failed!\n"); |
45fabbb7 EO |
2903 | ehc->unloaded_mask &= ~(1 << dev->devno); |
2904 | } | |
2905 | } | |
2906 | ||
0260731f | 2907 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2908 | struct ata_device **r_failed_dev) |
022bdb07 | 2909 | { |
0260731f TH |
2910 | struct ata_port *ap = link->ap; |
2911 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2912 | struct ata_device *dev; |
8c3c52a8 | 2913 | unsigned int new_mask = 0; |
084fe639 | 2914 | unsigned long flags; |
f58229f8 | 2915 | int rc = 0; |
022bdb07 TH |
2916 | |
2917 | DPRINTK("ENTER\n"); | |
2918 | ||
8c3c52a8 TH |
2919 | /* For PATA drive side cable detection to work, IDENTIFY must |
2920 | * be done backwards such that PDIAG- is released by the slave | |
2921 | * device before the master device is identified. | |
2922 | */ | |
1eca4365 | 2923 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
2924 | unsigned int action = ata_eh_dev_action(dev); |
2925 | unsigned int readid_flags = 0; | |
022bdb07 | 2926 | |
bff04647 TH |
2927 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2928 | readid_flags |= ATA_READID_POSTRESET; | |
2929 | ||
9666f400 | 2930 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2931 | WARN_ON(dev->class == ATA_DEV_PMP); |
2932 | ||
b1c72916 | 2933 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 2934 | rc = -EIO; |
8c3c52a8 | 2935 | goto err; |
022bdb07 TH |
2936 | } |
2937 | ||
0260731f | 2938 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2939 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2940 | readid_flags); | |
022bdb07 | 2941 | if (rc) |
8c3c52a8 | 2942 | goto err; |
022bdb07 | 2943 | |
0260731f | 2944 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2945 | |
baa1e78a TH |
2946 | /* Configuration may have changed, reconfigure |
2947 | * transfer mode. | |
2948 | */ | |
2949 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2950 | ||
3057ac3c | 2951 | /* schedule the scsi_rescan_device() here */ |
ad72cf98 | 2952 | schedule_work(&(ap->scsi_rescan_task)); |
084fe639 TH |
2953 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2954 | ehc->tries[dev->devno] && | |
2955 | ata_class_enabled(ehc->classes[dev->devno])) { | |
842faa6c TH |
2956 | /* Temporarily set dev->class, it will be |
2957 | * permanently set once all configurations are | |
2958 | * complete. This is necessary because new | |
2959 | * device configuration is done in two | |
2960 | * separate loops. | |
2961 | */ | |
084fe639 TH |
2962 | dev->class = ehc->classes[dev->devno]; |
2963 | ||
633273a3 TH |
2964 | if (dev->class == ATA_DEV_PMP) |
2965 | rc = sata_pmp_attach(dev); | |
2966 | else | |
2967 | rc = ata_dev_read_id(dev, &dev->class, | |
2968 | readid_flags, dev->id); | |
842faa6c TH |
2969 | |
2970 | /* read_id might have changed class, store and reset */ | |
2971 | ehc->classes[dev->devno] = dev->class; | |
2972 | dev->class = ATA_DEV_UNKNOWN; | |
2973 | ||
8c3c52a8 TH |
2974 | switch (rc) { |
2975 | case 0: | |
99cf610a TH |
2976 | /* clear error info accumulated during probe */ |
2977 | ata_ering_clear(&dev->ering); | |
f58229f8 | 2978 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2979 | break; |
2980 | case -ENOENT: | |
55a8e2c8 TH |
2981 | /* IDENTIFY was issued to non-existent |
2982 | * device. No need to reset. Just | |
842faa6c | 2983 | * thaw and ignore the device. |
55a8e2c8 TH |
2984 | */ |
2985 | ata_eh_thaw_port(ap); | |
084fe639 | 2986 | break; |
8c3c52a8 | 2987 | default: |
8c3c52a8 | 2988 | goto err; |
084fe639 | 2989 | } |
8c3c52a8 TH |
2990 | } |
2991 | } | |
084fe639 | 2992 | |
c1c4e8d5 | 2993 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
2994 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
2995 | if (ap->ops->cable_detect) | |
2996 | ap->cbl = ap->ops->cable_detect(ap); | |
2997 | ata_force_cbl(ap); | |
2998 | } | |
c1c4e8d5 | 2999 | |
8c3c52a8 TH |
3000 | /* Configure new devices forward such that user doesn't see |
3001 | * device detection messages backwards. | |
3002 | */ | |
1eca4365 | 3003 | ata_for_each_dev(dev, link, ALL) { |
4f7c2874 | 3004 | if (!(new_mask & (1 << dev->devno))) |
8c3c52a8 TH |
3005 | continue; |
3006 | ||
842faa6c TH |
3007 | dev->class = ehc->classes[dev->devno]; |
3008 | ||
4f7c2874 TH |
3009 | if (dev->class == ATA_DEV_PMP) |
3010 | continue; | |
3011 | ||
8c3c52a8 TH |
3012 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
3013 | rc = ata_dev_configure(dev); | |
3014 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
842faa6c TH |
3015 | if (rc) { |
3016 | dev->class = ATA_DEV_UNKNOWN; | |
8c3c52a8 | 3017 | goto err; |
842faa6c | 3018 | } |
8c3c52a8 TH |
3019 | |
3020 | spin_lock_irqsave(ap->lock, flags); | |
3021 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
3022 | spin_unlock_irqrestore(ap->lock, flags); | |
3023 | ||
3024 | /* new device discovered, configure xfermode */ | |
3025 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
3026 | } |
3027 | ||
8c3c52a8 | 3028 | return 0; |
022bdb07 | 3029 | |
8c3c52a8 TH |
3030 | err: |
3031 | *r_failed_dev = dev; | |
3032 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
3033 | return rc; |
3034 | } | |
3035 | ||
6f1d1e3a TH |
3036 | /** |
3037 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
3038 | * @link: link on which timings will be programmed | |
98a1708d | 3039 | * @r_failed_dev: out parameter for failed device |
6f1d1e3a TH |
3040 | * |
3041 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3042 | * ata_set_mode() fails, pointer to the failing device is | |
3043 | * returned in @r_failed_dev. | |
3044 | * | |
3045 | * LOCKING: | |
3046 | * PCI/etc. bus probe sem. | |
3047 | * | |
3048 | * RETURNS: | |
3049 | * 0 on success, negative errno otherwise | |
3050 | */ | |
3051 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
3052 | { | |
3053 | struct ata_port *ap = link->ap; | |
00115e0f TH |
3054 | struct ata_device *dev; |
3055 | int rc; | |
6f1d1e3a | 3056 | |
76326ac1 | 3057 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 3058 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
3059 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
3060 | struct ata_ering_entry *ent; | |
3061 | ||
3062 | ent = ata_ering_top(&dev->ering); | |
3063 | if (ent) | |
3064 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
3065 | } | |
3066 | } | |
3067 | ||
6f1d1e3a TH |
3068 | /* has private set_mode? */ |
3069 | if (ap->ops->set_mode) | |
00115e0f TH |
3070 | rc = ap->ops->set_mode(link, r_failed_dev); |
3071 | else | |
3072 | rc = ata_do_set_mode(link, r_failed_dev); | |
3073 | ||
3074 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 3075 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
3076 | struct ata_eh_context *ehc = &link->eh_context; |
3077 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
3078 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
3079 | ||
3080 | if (dev->xfer_mode != saved_xfer_mode || | |
3081 | ata_ncq_enabled(dev) != saved_ncq) | |
3082 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
3083 | } | |
3084 | ||
3085 | return rc; | |
6f1d1e3a TH |
3086 | } |
3087 | ||
11fc33da TH |
3088 | /** |
3089 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
3090 | * @dev: ATAPI device to clear UA for | |
3091 | * | |
3092 | * Resets and other operations can make an ATAPI device raise | |
3093 | * UNIT ATTENTION which causes the next operation to fail. This | |
3094 | * function clears UA. | |
3095 | * | |
3096 | * LOCKING: | |
3097 | * EH context (may sleep). | |
3098 | * | |
3099 | * RETURNS: | |
3100 | * 0 on success, -errno on failure. | |
3101 | */ | |
3102 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
3103 | { | |
3104 | int i; | |
3105 | ||
3106 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 3107 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
3108 | u8 sense_key = 0; |
3109 | unsigned int err_mask; | |
3110 | ||
3111 | err_mask = atapi_eh_tur(dev, &sense_key); | |
3112 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3113 | ata_dev_warn(dev, |
3114 | "TEST_UNIT_READY failed (err_mask=0x%x)\n", | |
3115 | err_mask); | |
11fc33da TH |
3116 | return -EIO; |
3117 | } | |
3118 | ||
3119 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
3120 | return 0; | |
3121 | ||
3122 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
3123 | if (err_mask) { | |
a9a79dfe | 3124 | ata_dev_warn(dev, "failed to clear " |
11fc33da TH |
3125 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); |
3126 | return -EIO; | |
3127 | } | |
3128 | } | |
3129 | ||
a9a79dfe JP |
3130 | ata_dev_warn(dev, "UNIT ATTENTION persists after %d tries\n", |
3131 | ATA_EH_UA_TRIES); | |
11fc33da TH |
3132 | |
3133 | return 0; | |
3134 | } | |
3135 | ||
6013efd8 TH |
3136 | /** |
3137 | * ata_eh_maybe_retry_flush - Retry FLUSH if necessary | |
3138 | * @dev: ATA device which may need FLUSH retry | |
3139 | * | |
3140 | * If @dev failed FLUSH, it needs to be reported upper layer | |
3141 | * immediately as it means that @dev failed to remap and already | |
3142 | * lost at least a sector and further FLUSH retrials won't make | |
3143 | * any difference to the lost sector. However, if FLUSH failed | |
3144 | * for other reasons, for example transmission error, FLUSH needs | |
3145 | * to be retried. | |
3146 | * | |
3147 | * This function determines whether FLUSH failure retry is | |
3148 | * necessary and performs it if so. | |
3149 | * | |
3150 | * RETURNS: | |
3151 | * 0 if EH can continue, -errno if EH needs to be repeated. | |
3152 | */ | |
3153 | static int ata_eh_maybe_retry_flush(struct ata_device *dev) | |
3154 | { | |
3155 | struct ata_link *link = dev->link; | |
3156 | struct ata_port *ap = link->ap; | |
3157 | struct ata_queued_cmd *qc; | |
3158 | struct ata_taskfile tf; | |
3159 | unsigned int err_mask; | |
3160 | int rc = 0; | |
3161 | ||
3162 | /* did flush fail for this device? */ | |
3163 | if (!ata_tag_valid(link->active_tag)) | |
3164 | return 0; | |
3165 | ||
3166 | qc = __ata_qc_from_tag(ap, link->active_tag); | |
3167 | if (qc->dev != dev || (qc->tf.command != ATA_CMD_FLUSH_EXT && | |
3168 | qc->tf.command != ATA_CMD_FLUSH)) | |
3169 | return 0; | |
3170 | ||
3171 | /* if the device failed it, it should be reported to upper layers */ | |
3172 | if (qc->err_mask & AC_ERR_DEV) | |
3173 | return 0; | |
3174 | ||
3175 | /* flush failed for some other reason, give it another shot */ | |
3176 | ata_tf_init(dev, &tf); | |
3177 | ||
3178 | tf.command = qc->tf.command; | |
3179 | tf.flags |= ATA_TFLAG_DEVICE; | |
3180 | tf.protocol = ATA_PROT_NODATA; | |
3181 | ||
a9a79dfe | 3182 | ata_dev_warn(dev, "retrying FLUSH 0x%x Emask 0x%x\n", |
6013efd8 TH |
3183 | tf.command, qc->err_mask); |
3184 | ||
3185 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
3186 | if (!err_mask) { | |
3187 | /* | |
3188 | * FLUSH is complete but there's no way to | |
3189 | * successfully complete a failed command from EH. | |
3190 | * Making sure retry is allowed at least once and | |
3191 | * retrying it should do the trick - whatever was in | |
3192 | * the cache is already on the platter and this won't | |
3193 | * cause infinite loop. | |
3194 | */ | |
3195 | qc->scsicmd->allowed = max(qc->scsicmd->allowed, 1); | |
3196 | } else { | |
a9a79dfe | 3197 | ata_dev_warn(dev, "FLUSH failed Emask 0x%x\n", |
6013efd8 TH |
3198 | err_mask); |
3199 | rc = -EIO; | |
3200 | ||
3201 | /* if device failed it, report it to upper layers */ | |
3202 | if (err_mask & AC_ERR_DEV) { | |
3203 | qc->err_mask |= AC_ERR_DEV; | |
3204 | qc->result_tf = tf; | |
3205 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
3206 | rc = 0; | |
3207 | } | |
3208 | } | |
3209 | return rc; | |
3210 | } | |
3211 | ||
6b7ae954 TH |
3212 | /** |
3213 | * ata_eh_set_lpm - configure SATA interface power management | |
3214 | * @link: link to configure power management | |
3215 | * @policy: the link power management policy | |
3216 | * @r_failed_dev: out parameter for failed device | |
3217 | * | |
3218 | * Enable SATA Interface power management. This will enable | |
f4ac6476 HG |
3219 | * Device Interface Power Management (DIPM) for min_power and |
3220 | * medium_power_with_dipm policies, and then call driver specific | |
3221 | * callbacks for enabling Host Initiated Power management. | |
6b7ae954 TH |
3222 | * |
3223 | * LOCKING: | |
3224 | * EH context. | |
3225 | * | |
3226 | * RETURNS: | |
3227 | * 0 on success, -errno on failure. | |
3228 | */ | |
3229 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
3230 | struct ata_device **r_failed_dev) | |
3231 | { | |
6c8ea89c | 3232 | struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL; |
6b7ae954 TH |
3233 | struct ata_eh_context *ehc = &link->eh_context; |
3234 | struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; | |
e5005b15 | 3235 | enum ata_lpm_policy old_policy = link->lpm_policy; |
5f6f12cc | 3236 | bool no_dipm = link->ap->flags & ATA_FLAG_NO_DIPM; |
6b7ae954 TH |
3237 | unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; |
3238 | unsigned int err_mask; | |
3239 | int rc; | |
3240 | ||
3241 | /* if the link or host doesn't do LPM, noop */ | |
4c9029e7 BZ |
3242 | if (!IS_ENABLED(CONFIG_SATA_HOST) || |
3243 | (link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) | |
6b7ae954 TH |
3244 | return 0; |
3245 | ||
3246 | /* | |
3247 | * DIPM is enabled only for MIN_POWER as some devices | |
3248 | * misbehave when the host NACKs transition to SLUMBER. Order | |
3249 | * device and link configurations such that the host always | |
3250 | * allows DIPM requests. | |
3251 | */ | |
3252 | ata_for_each_dev(dev, link, ENABLED) { | |
3253 | bool hipm = ata_id_has_hipm(dev->id); | |
ae01b249 | 3254 | bool dipm = ata_id_has_dipm(dev->id) && !no_dipm; |
6b7ae954 TH |
3255 | |
3256 | /* find the first enabled and LPM enabled devices */ | |
3257 | if (!link_dev) | |
3258 | link_dev = dev; | |
3259 | ||
3260 | if (!lpm_dev && (hipm || dipm)) | |
3261 | lpm_dev = dev; | |
3262 | ||
3263 | hints &= ~ATA_LPM_EMPTY; | |
3264 | if (!hipm) | |
3265 | hints &= ~ATA_LPM_HIPM; | |
3266 | ||
3267 | /* disable DIPM before changing link config */ | |
f4ac6476 | 3268 | if (policy < ATA_LPM_MED_POWER_WITH_DIPM && dipm) { |
6b7ae954 TH |
3269 | err_mask = ata_dev_set_feature(dev, |
3270 | SETFEATURES_SATA_DISABLE, SATA_DIPM); | |
3271 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3272 | ata_dev_warn(dev, |
3273 | "failed to disable DIPM, Emask 0x%x\n", | |
3274 | err_mask); | |
6b7ae954 TH |
3275 | rc = -EIO; |
3276 | goto fail; | |
3277 | } | |
3278 | } | |
3279 | } | |
3280 | ||
6c8ea89c TH |
3281 | if (ap) { |
3282 | rc = ap->ops->set_lpm(link, policy, hints); | |
3283 | if (!rc && ap->slave_link) | |
3284 | rc = ap->ops->set_lpm(ap->slave_link, policy, hints); | |
3285 | } else | |
3286 | rc = sata_pmp_set_lpm(link, policy, hints); | |
6b7ae954 TH |
3287 | |
3288 | /* | |
3289 | * Attribute link config failure to the first (LPM) enabled | |
3290 | * device on the link. | |
3291 | */ | |
3292 | if (rc) { | |
3293 | if (rc == -EOPNOTSUPP) { | |
3294 | link->flags |= ATA_LFLAG_NO_LPM; | |
3295 | return 0; | |
3296 | } | |
3297 | dev = lpm_dev ? lpm_dev : link_dev; | |
3298 | goto fail; | |
3299 | } | |
3300 | ||
e5005b15 TH |
3301 | /* |
3302 | * Low level driver acked the transition. Issue DIPM command | |
3303 | * with the new policy set. | |
3304 | */ | |
3305 | link->lpm_policy = policy; | |
3306 | if (ap && ap->slave_link) | |
3307 | ap->slave_link->lpm_policy = policy; | |
3308 | ||
6b7ae954 TH |
3309 | /* host config updated, enable DIPM if transitioning to MIN_POWER */ |
3310 | ata_for_each_dev(dev, link, ENABLED) { | |
f4ac6476 | 3311 | if (policy >= ATA_LPM_MED_POWER_WITH_DIPM && !no_dipm && |
ae01b249 | 3312 | ata_id_has_dipm(dev->id)) { |
6b7ae954 TH |
3313 | err_mask = ata_dev_set_feature(dev, |
3314 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
3315 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe | 3316 | ata_dev_warn(dev, |
6b7ae954 TH |
3317 | "failed to enable DIPM, Emask 0x%x\n", |
3318 | err_mask); | |
3319 | rc = -EIO; | |
3320 | goto fail; | |
3321 | } | |
3322 | } | |
3323 | } | |
3324 | ||
09c5b480 GM |
3325 | link->last_lpm_change = jiffies; |
3326 | link->flags |= ATA_LFLAG_CHANGED; | |
3327 | ||
6b7ae954 TH |
3328 | return 0; |
3329 | ||
3330 | fail: | |
e5005b15 TH |
3331 | /* restore the old policy */ |
3332 | link->lpm_policy = old_policy; | |
3333 | if (ap && ap->slave_link) | |
3334 | ap->slave_link->lpm_policy = old_policy; | |
3335 | ||
6b7ae954 TH |
3336 | /* if no device or only one more chance is left, disable LPM */ |
3337 | if (!dev || ehc->tries[dev->devno] <= 2) { | |
a9a79dfe | 3338 | ata_link_warn(link, "disabling LPM on the link\n"); |
6b7ae954 TH |
3339 | link->flags |= ATA_LFLAG_NO_LPM; |
3340 | } | |
3341 | if (r_failed_dev) | |
3342 | *r_failed_dev = dev; | |
3343 | return rc; | |
3344 | } | |
3345 | ||
8a745f1f | 3346 | int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 3347 | { |
f58229f8 TH |
3348 | struct ata_device *dev; |
3349 | int cnt = 0; | |
022bdb07 | 3350 | |
1eca4365 TH |
3351 | ata_for_each_dev(dev, link, ENABLED) |
3352 | cnt++; | |
022bdb07 TH |
3353 | return cnt; |
3354 | } | |
3355 | ||
0260731f | 3356 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 3357 | { |
f58229f8 TH |
3358 | struct ata_device *dev; |
3359 | int cnt = 0; | |
084fe639 | 3360 | |
1eca4365 | 3361 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 3362 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
3363 | cnt++; |
3364 | return cnt; | |
3365 | } | |
3366 | ||
0260731f | 3367 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 3368 | { |
672b2d65 | 3369 | struct ata_port *ap = link->ap; |
0260731f | 3370 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 3371 | struct ata_device *dev; |
084fe639 | 3372 | |
f9df58cb TH |
3373 | /* skip disabled links */ |
3374 | if (link->flags & ATA_LFLAG_DISABLED) | |
3375 | return 1; | |
3376 | ||
e2f3d75f TH |
3377 | /* skip if explicitly requested */ |
3378 | if (ehc->i.flags & ATA_EHI_NO_RECOVERY) | |
3379 | return 1; | |
3380 | ||
672b2d65 TH |
3381 | /* thaw frozen port and recover failed devices */ |
3382 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
3383 | return 0; | |
3384 | ||
3385 | /* reset at least once if reset is requested */ | |
3386 | if ((ehc->i.action & ATA_EH_RESET) && | |
3387 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
3388 | return 0; |
3389 | ||
3390 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 3391 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
3392 | if (dev->class == ATA_DEV_UNKNOWN && |
3393 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
3394 | return 0; | |
3395 | } | |
3396 | ||
3397 | return 1; | |
3398 | } | |
3399 | ||
c2c7a89c TH |
3400 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
3401 | { | |
3402 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
3403 | u64 now = get_jiffies_64(); | |
3404 | int *trials = void_arg; | |
3405 | ||
6868225e LM |
3406 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || |
3407 | (ent->timestamp < now - min(now, interval))) | |
c2c7a89c TH |
3408 | return -1; |
3409 | ||
3410 | (*trials)++; | |
3411 | return 0; | |
3412 | } | |
3413 | ||
02c05a27 TH |
3414 | static int ata_eh_schedule_probe(struct ata_device *dev) |
3415 | { | |
3416 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3417 | struct ata_link *link = ata_dev_phys_link(dev); |
3418 | int trials = 0; | |
02c05a27 TH |
3419 | |
3420 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3421 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3422 | return 0; | |
3423 | ||
3424 | ata_eh_detach_dev(dev); | |
3425 | ata_dev_init(dev); | |
3426 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3427 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3428 | ehc->saved_xfer_mode[dev->devno] = 0; |
3429 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3430 | |
6b7ae954 | 3431 | /* the link maybe in a deep sleep, wake it up */ |
6c8ea89c TH |
3432 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { |
3433 | if (ata_is_host_link(link)) | |
3434 | link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER, | |
3435 | ATA_LPM_EMPTY); | |
3436 | else | |
3437 | sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER, | |
3438 | ATA_LPM_EMPTY); | |
3439 | } | |
6b7ae954 | 3440 | |
c2c7a89c TH |
3441 | /* Record and count probe trials on the ering. The specific |
3442 | * error mask used is irrelevant. Because a successful device | |
3443 | * detection clears the ering, this count accumulates only if | |
3444 | * there are consecutive failed probes. | |
3445 | * | |
3446 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3447 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3448 | * forced to 1.5Gbps. | |
3449 | * | |
3450 | * This is to work around cases where failed link speed | |
3451 | * negotiation results in device misdetection leading to | |
3452 | * infinite DEVXCHG or PHRDY CHG events. | |
3453 | */ | |
3454 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3455 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3456 | ||
3457 | if (trials > ATA_EH_PROBE_TRIALS) | |
3458 | sata_down_spd_limit(link, 1); | |
3459 | ||
02c05a27 TH |
3460 | return 1; |
3461 | } | |
3462 | ||
9b1e2658 | 3463 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3464 | { |
9af5c9c9 | 3465 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3466 | |
cf9a590a TH |
3467 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3468 | * The requester is responsible for ensuring forward progress. | |
3469 | */ | |
3470 | if (err != -EAGAIN) | |
3471 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3472 | |
3473 | switch (err) { | |
3474 | case -ENODEV: | |
3475 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3476 | ehc->i.probe_mask |= (1 << dev->devno); | |
df561f66 | 3477 | fallthrough; |
fee7ca72 TH |
3478 | case -EINVAL: |
3479 | /* give it just one more chance */ | |
3480 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
df561f66 | 3481 | fallthrough; |
fee7ca72 | 3482 | case -EIO: |
d89293ab | 3483 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3484 | /* This is the last chance, better to slow |
3485 | * down than lose it. | |
3486 | */ | |
a07d499b | 3487 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3488 | if (dev->pio_mode > XFER_PIO_0) |
3489 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3490 | } |
3491 | } | |
3492 | ||
3493 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3494 | /* disable device if it has used up all its chances */ | |
3495 | ata_dev_disable(dev); | |
3496 | ||
3497 | /* detach if offline */ | |
b1c72916 | 3498 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3499 | ata_eh_detach_dev(dev); |
3500 | ||
02c05a27 | 3501 | /* schedule probe if necessary */ |
87fbc5a0 | 3502 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3503 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3504 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3505 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3506 | } | |
9b1e2658 TH |
3507 | |
3508 | return 1; | |
fee7ca72 | 3509 | } else { |
cf480626 | 3510 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3511 | return 0; |
fee7ca72 TH |
3512 | } |
3513 | } | |
3514 | ||
022bdb07 TH |
3515 | /** |
3516 | * ata_eh_recover - recover host port after error | |
3517 | * @ap: host port to recover | |
f5914a46 | 3518 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3519 | * @softreset: softreset method (can be NULL) |
3520 | * @hardreset: hardreset method (can be NULL) | |
3521 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3522 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3523 | * |
3524 | * This is the alpha and omega, eum and yang, heart and soul of | |
3525 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3526 | * recover each link and hotplug requests are recorded in the |
3527 | * link's eh_context. This function executes all the operations | |
3528 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3529 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3530 | * |
3531 | * LOCKING: | |
3532 | * Kernel thread context (may sleep). | |
3533 | * | |
3534 | * RETURNS: | |
3535 | * 0 on success, -errno on failure. | |
3536 | */ | |
fb7fd614 TH |
3537 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3538 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3539 | ata_postreset_fn_t postreset, | |
3540 | struct ata_link **r_failed_link) | |
022bdb07 | 3541 | { |
9b1e2658 | 3542 | struct ata_link *link; |
022bdb07 | 3543 | struct ata_device *dev; |
6b7ae954 | 3544 | int rc, nr_fails; |
45fabbb7 | 3545 | unsigned long flags, deadline; |
022bdb07 TH |
3546 | |
3547 | DPRINTK("ENTER\n"); | |
3548 | ||
3549 | /* prep for recovery */ | |
1eca4365 | 3550 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3551 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3552 | |
f9df58cb TH |
3553 | /* re-enable link? */ |
3554 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3555 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3556 | spin_lock_irqsave(ap->lock, flags); | |
3557 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3558 | spin_unlock_irqrestore(ap->lock, flags); | |
3559 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3560 | } | |
3561 | ||
1eca4365 | 3562 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3563 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3564 | ehc->tries[dev->devno] = 1; | |
3565 | else | |
3566 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3567 | |
9b1e2658 TH |
3568 | /* collect port action mask recorded in dev actions */ |
3569 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3570 | ~ATA_EH_PERDEV_MASK; | |
3571 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3572 | ||
3573 | /* process hotplug request */ | |
3574 | if (dev->flags & ATA_DFLAG_DETACH) | |
3575 | ata_eh_detach_dev(dev); | |
3576 | ||
02c05a27 TH |
3577 | /* schedule probe if necessary */ |
3578 | if (!ata_dev_enabled(dev)) | |
3579 | ata_eh_schedule_probe(dev); | |
084fe639 | 3580 | } |
022bdb07 TH |
3581 | } |
3582 | ||
3583 | retry: | |
022bdb07 TH |
3584 | rc = 0; |
3585 | ||
aeb2ecd6 | 3586 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3587 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3588 | goto out; |
3589 | ||
9b1e2658 | 3590 | /* prep for EH */ |
1eca4365 | 3591 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3592 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3593 | |
9b1e2658 TH |
3594 | /* skip EH if possible. */ |
3595 | if (ata_eh_skip_recovery(link)) | |
3596 | ehc->i.action = 0; | |
3597 | ||
1eca4365 | 3598 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3599 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3600 | } | |
084fe639 | 3601 | |
022bdb07 | 3602 | /* reset */ |
1eca4365 | 3603 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3604 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3605 | |
dc98c32c TH |
3606 | if (!(ehc->i.action & ATA_EH_RESET)) |
3607 | continue; | |
9b1e2658 | 3608 | |
dc98c32c TH |
3609 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3610 | prereset, softreset, hardreset, postreset); | |
3611 | if (rc) { | |
a9a79dfe | 3612 | ata_link_err(link, "reset failed, giving up\n"); |
dc98c32c | 3613 | goto out; |
022bdb07 | 3614 | } |
022bdb07 TH |
3615 | } |
3616 | ||
45fabbb7 EO |
3617 | do { |
3618 | unsigned long now; | |
3619 | ||
3620 | /* | |
3621 | * clears ATA_EH_PARK in eh_info and resets | |
3622 | * ap->park_req_pending | |
3623 | */ | |
3624 | ata_eh_pull_park_action(ap); | |
3625 | ||
3626 | deadline = jiffies; | |
1eca4365 TH |
3627 | ata_for_each_link(link, ap, EDGE) { |
3628 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3629 | struct ata_eh_context *ehc = &link->eh_context; |
3630 | unsigned long tmp; | |
3631 | ||
9162c657 HR |
3632 | if (dev->class != ATA_DEV_ATA && |
3633 | dev->class != ATA_DEV_ZAC) | |
45fabbb7 EO |
3634 | continue; |
3635 | if (!(ehc->i.dev_action[dev->devno] & | |
3636 | ATA_EH_PARK)) | |
3637 | continue; | |
3638 | tmp = dev->unpark_deadline; | |
3639 | if (time_before(deadline, tmp)) | |
3640 | deadline = tmp; | |
3641 | else if (time_before_eq(tmp, jiffies)) | |
3642 | continue; | |
3643 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3644 | continue; | |
3645 | ||
3646 | ata_eh_park_issue_cmd(dev, 1); | |
3647 | } | |
3648 | } | |
3649 | ||
3650 | now = jiffies; | |
3651 | if (time_before_eq(deadline, now)) | |
3652 | break; | |
3653 | ||
c0c362b6 | 3654 | ata_eh_release(ap); |
45fabbb7 EO |
3655 | deadline = wait_for_completion_timeout(&ap->park_req_pending, |
3656 | deadline - now); | |
c0c362b6 | 3657 | ata_eh_acquire(ap); |
45fabbb7 | 3658 | } while (deadline); |
1eca4365 TH |
3659 | ata_for_each_link(link, ap, EDGE) { |
3660 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3661 | if (!(link->eh_context.unloaded_mask & |
3662 | (1 << dev->devno))) | |
3663 | continue; | |
3664 | ||
3665 | ata_eh_park_issue_cmd(dev, 0); | |
3666 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3667 | } | |
3668 | } | |
3669 | ||
9b1e2658 | 3670 | /* the rest */ |
6b7ae954 TH |
3671 | nr_fails = 0; |
3672 | ata_for_each_link(link, ap, PMP_FIRST) { | |
9b1e2658 | 3673 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3674 | |
6b7ae954 TH |
3675 | if (sata_pmp_attached(ap) && ata_is_host_link(link)) |
3676 | goto config_lpm; | |
3677 | ||
9b1e2658 TH |
3678 | /* revalidate existing devices and attach new ones */ |
3679 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3680 | if (rc) |
6b7ae954 | 3681 | goto rest_fail; |
022bdb07 | 3682 | |
633273a3 TH |
3683 | /* if PMP got attached, return, pmp EH will take care of it */ |
3684 | if (link->device->class == ATA_DEV_PMP) { | |
3685 | ehc->i.action = 0; | |
3686 | return 0; | |
3687 | } | |
3688 | ||
9b1e2658 TH |
3689 | /* configure transfer mode if necessary */ |
3690 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3691 | rc = ata_set_mode(link, &dev); | |
3692 | if (rc) | |
6b7ae954 | 3693 | goto rest_fail; |
9b1e2658 TH |
3694 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
3695 | } | |
3696 | ||
11fc33da TH |
3697 | /* If reset has been issued, clear UA to avoid |
3698 | * disrupting the current users of the device. | |
3699 | */ | |
3700 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3701 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3702 | if (dev->class != ATA_DEV_ATAPI) |
3703 | continue; | |
3704 | rc = atapi_eh_clear_ua(dev); | |
3705 | if (rc) | |
6b7ae954 | 3706 | goto rest_fail; |
21334205 AL |
3707 | if (zpodd_dev_enabled(dev)) |
3708 | zpodd_post_poweron(dev); | |
11fc33da TH |
3709 | } |
3710 | } | |
3711 | ||
6013efd8 TH |
3712 | /* retry flush if necessary */ |
3713 | ata_for_each_dev(dev, link, ALL) { | |
9162c657 HR |
3714 | if (dev->class != ATA_DEV_ATA && |
3715 | dev->class != ATA_DEV_ZAC) | |
6013efd8 TH |
3716 | continue; |
3717 | rc = ata_eh_maybe_retry_flush(dev); | |
3718 | if (rc) | |
6b7ae954 | 3719 | goto rest_fail; |
6013efd8 TH |
3720 | } |
3721 | ||
6b7ae954 | 3722 | config_lpm: |
11fc33da | 3723 | /* configure link power saving */ |
6b7ae954 TH |
3724 | if (link->lpm_policy != ap->target_lpm_policy) { |
3725 | rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev); | |
3726 | if (rc) | |
3727 | goto rest_fail; | |
3728 | } | |
ca77329f | 3729 | |
9b1e2658 TH |
3730 | /* this link is okay now */ |
3731 | ehc->i.flags = 0; | |
3732 | continue; | |
022bdb07 | 3733 | |
6b7ae954 TH |
3734 | rest_fail: |
3735 | nr_fails++; | |
3736 | if (dev) | |
3737 | ata_eh_handle_dev_fail(dev, rc); | |
022bdb07 | 3738 | |
b06ce3e5 TH |
3739 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3740 | /* PMP reset requires working host port. | |
3741 | * Can't retry if it's frozen. | |
3742 | */ | |
071f44b1 | 3743 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3744 | goto out; |
9b1e2658 | 3745 | break; |
b06ce3e5 | 3746 | } |
022bdb07 TH |
3747 | } |
3748 | ||
6b7ae954 | 3749 | if (nr_fails) |
9b1e2658 | 3750 | goto retry; |
022bdb07 | 3751 | |
9b1e2658 TH |
3752 | out: |
3753 | if (rc && r_failed_link) | |
3754 | *r_failed_link = link; | |
3755 | ||
022bdb07 TH |
3756 | DPRINTK("EXIT, rc=%d\n", rc); |
3757 | return rc; | |
3758 | } | |
3759 | ||
3760 | /** | |
3761 | * ata_eh_finish - finish up EH | |
3762 | * @ap: host port to finish EH for | |
3763 | * | |
3764 | * Recovery is complete. Clean up EH states and retry or finish | |
3765 | * failed qcs. | |
3766 | * | |
3767 | * LOCKING: | |
3768 | * None. | |
3769 | */ | |
fb7fd614 | 3770 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 | 3771 | { |
258c4e5c | 3772 | struct ata_queued_cmd *qc; |
022bdb07 TH |
3773 | int tag; |
3774 | ||
3775 | /* retry or finish qcs */ | |
258c4e5c | 3776 | ata_qc_for_each_raw(ap, qc, tag) { |
022bdb07 TH |
3777 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
3778 | continue; | |
3779 | ||
3780 | if (qc->err_mask) { | |
3781 | /* FIXME: Once EH migration is complete, | |
3782 | * generate sense data in this function, | |
3783 | * considering both err_mask and tf. | |
3784 | */ | |
03faab78 | 3785 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3786 | ata_eh_qc_retry(qc); |
03faab78 TH |
3787 | else |
3788 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3789 | } else { |
3790 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3791 | ata_eh_qc_complete(qc); | |
3792 | } else { | |
3793 | /* feed zero TF to sense generation */ | |
3794 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3795 | ata_eh_qc_retry(qc); | |
3796 | } | |
3797 | } | |
3798 | } | |
da917d69 TH |
3799 | |
3800 | /* make sure nr_active_links is zero after EH */ | |
3801 | WARN_ON(ap->nr_active_links); | |
3802 | ap->nr_active_links = 0; | |
022bdb07 TH |
3803 | } |
3804 | ||
3805 | /** | |
3806 | * ata_do_eh - do standard error handling | |
3807 | * @ap: host port to handle error for | |
a1efdaba | 3808 | * |
f5914a46 | 3809 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3810 | * @softreset: softreset method (can be NULL) |
3811 | * @hardreset: hardreset method (can be NULL) | |
3812 | * @postreset: postreset method (can be NULL) | |
3813 | * | |
3814 | * Perform standard error handling sequence. | |
3815 | * | |
3816 | * LOCKING: | |
3817 | * Kernel thread context (may sleep). | |
3818 | */ | |
f5914a46 TH |
3819 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3820 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3821 | ata_postreset_fn_t postreset) | |
022bdb07 | 3822 | { |
9b1e2658 TH |
3823 | struct ata_device *dev; |
3824 | int rc; | |
3825 | ||
3826 | ata_eh_autopsy(ap); | |
3827 | ata_eh_report(ap); | |
3828 | ||
3829 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3830 | NULL); | |
3831 | if (rc) { | |
1eca4365 | 3832 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
3833 | ata_dev_disable(dev); |
3834 | } | |
3835 | ||
022bdb07 TH |
3836 | ata_eh_finish(ap); |
3837 | } | |
500530f6 | 3838 | |
a1efdaba TH |
3839 | /** |
3840 | * ata_std_error_handler - standard error handler | |
3841 | * @ap: host port to handle error for | |
3842 | * | |
3843 | * Standard error handler | |
3844 | * | |
3845 | * LOCKING: | |
3846 | * Kernel thread context (may sleep). | |
3847 | */ | |
3848 | void ata_std_error_handler(struct ata_port *ap) | |
3849 | { | |
3850 | struct ata_port_operations *ops = ap->ops; | |
3851 | ata_reset_fn_t hardreset = ops->hardreset; | |
3852 | ||
57c9efdf | 3853 | /* ignore built-in hardreset if SCR access is not available */ |
fe06e5f9 | 3854 | if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) |
a1efdaba TH |
3855 | hardreset = NULL; |
3856 | ||
3857 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
3858 | } | |
a52fbcfc | 3859 | EXPORT_SYMBOL_GPL(ata_std_error_handler); |
a1efdaba | 3860 | |
6ffa01d8 | 3861 | #ifdef CONFIG_PM |
500530f6 TH |
3862 | /** |
3863 | * ata_eh_handle_port_suspend - perform port suspend operation | |
3864 | * @ap: port to suspend | |
3865 | * | |
3866 | * Suspend @ap. | |
3867 | * | |
3868 | * LOCKING: | |
3869 | * Kernel thread context (may sleep). | |
3870 | */ | |
3871 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
3872 | { | |
3873 | unsigned long flags; | |
3874 | int rc = 0; | |
3dc67440 | 3875 | struct ata_device *dev; |
500530f6 TH |
3876 | |
3877 | /* are we suspending? */ | |
3878 | spin_lock_irqsave(ap->lock, flags); | |
3879 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 3880 | ap->pm_mesg.event & PM_EVENT_RESUME) { |
500530f6 TH |
3881 | spin_unlock_irqrestore(ap->lock, flags); |
3882 | return; | |
3883 | } | |
3884 | spin_unlock_irqrestore(ap->lock, flags); | |
3885 | ||
3886 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
3887 | ||
3dc67440 AL |
3888 | /* |
3889 | * If we have a ZPODD attached, check its zero | |
3890 | * power ready status before the port is frozen. | |
a7ff60db | 3891 | * Only needed for runtime suspend. |
3dc67440 | 3892 | */ |
a7ff60db AL |
3893 | if (PMSG_IS_AUTO(ap->pm_mesg)) { |
3894 | ata_for_each_dev(dev, &ap->link, ENABLED) { | |
3895 | if (zpodd_dev_enabled(dev)) | |
3896 | zpodd_on_suspend(dev); | |
3897 | } | |
3dc67440 AL |
3898 | } |
3899 | ||
64578a3d TH |
3900 | /* tell ACPI we're suspending */ |
3901 | rc = ata_acpi_on_suspend(ap); | |
3902 | if (rc) | |
3903 | goto out; | |
3904 | ||
500530f6 TH |
3905 | /* suspend */ |
3906 | ata_eh_freeze_port(ap); | |
3907 | ||
3908 | if (ap->ops->port_suspend) | |
3909 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
3910 | ||
a7ff60db | 3911 | ata_acpi_set_state(ap, ap->pm_mesg); |
64578a3d | 3912 | out: |
bc6e7c4b | 3913 | /* update the flags */ |
500530f6 TH |
3914 | spin_lock_irqsave(ap->lock, flags); |
3915 | ||
3916 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
3917 | if (rc == 0) | |
3918 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 3919 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
3920 | ata_port_schedule_eh(ap); |
3921 | ||
500530f6 TH |
3922 | spin_unlock_irqrestore(ap->lock, flags); |
3923 | ||
3924 | return; | |
3925 | } | |
3926 | ||
3927 | /** | |
3928 | * ata_eh_handle_port_resume - perform port resume operation | |
3929 | * @ap: port to resume | |
3930 | * | |
3931 | * Resume @ap. | |
3932 | * | |
500530f6 TH |
3933 | * LOCKING: |
3934 | * Kernel thread context (may sleep). | |
3935 | */ | |
3936 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
3937 | { | |
6f9c1ea2 TH |
3938 | struct ata_link *link; |
3939 | struct ata_device *dev; | |
500530f6 | 3940 | unsigned long flags; |
500530f6 TH |
3941 | |
3942 | /* are we resuming? */ | |
3943 | spin_lock_irqsave(ap->lock, flags); | |
3944 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 3945 | !(ap->pm_mesg.event & PM_EVENT_RESUME)) { |
500530f6 TH |
3946 | spin_unlock_irqrestore(ap->lock, flags); |
3947 | return; | |
3948 | } | |
3949 | spin_unlock_irqrestore(ap->lock, flags); | |
3950 | ||
9666f400 | 3951 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 3952 | |
6f9c1ea2 TH |
3953 | /* |
3954 | * Error timestamps are in jiffies which doesn't run while | |
3955 | * suspended and PHY events during resume isn't too uncommon. | |
3956 | * When the two are combined, it can lead to unnecessary speed | |
3957 | * downs if the machine is suspended and resumed repeatedly. | |
3958 | * Clear error history. | |
3959 | */ | |
3960 | ata_for_each_link(link, ap, HOST_FIRST) | |
3961 | ata_for_each_dev(dev, link, ALL) | |
3962 | ata_ering_clear(&dev->ering); | |
3963 | ||
a7ff60db | 3964 | ata_acpi_set_state(ap, ap->pm_mesg); |
bd3adca5 | 3965 | |
500530f6 | 3966 | if (ap->ops->port_resume) |
ae867937 | 3967 | ap->ops->port_resume(ap); |
500530f6 | 3968 | |
6746544c TH |
3969 | /* tell ACPI that we're resuming */ |
3970 | ata_acpi_on_resume(ap); | |
3971 | ||
bc6e7c4b | 3972 | /* update the flags */ |
500530f6 TH |
3973 | spin_lock_irqsave(ap->lock, flags); |
3974 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
500530f6 TH |
3975 | spin_unlock_irqrestore(ap->lock, flags); |
3976 | } | |
6ffa01d8 | 3977 | #endif /* CONFIG_PM */ |