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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 | * | |
8c3d3d4b | 5 | * Maintained by: Tejun Heo <tj@kernel.org> |
ece1d636 TH |
6 | * Please ALWAYS copy linux-ide@vger.kernel.org |
7 | * on emails. | |
8 | * | |
9 | * Copyright 2006 Tejun Heo <htejun@gmail.com> | |
10 | * | |
ece1d636 | 11 | * libata documentation is available via 'make {ps|pdf}docs', |
9bb9a39c | 12 | * as Documentation/driver-api/libata.rst |
ece1d636 TH |
13 | * |
14 | * Hardware documentation available from http://www.t13.org/ and | |
15 | * http://www.sata-io.org/ | |
ece1d636 TH |
16 | */ |
17 | ||
ece1d636 | 18 | #include <linux/kernel.h> |
242f9dcb | 19 | #include <linux/blkdev.h> |
38789fda | 20 | #include <linux/export.h> |
2855568b | 21 | #include <linux/pci.h> |
ece1d636 TH |
22 | #include <scsi/scsi.h> |
23 | #include <scsi/scsi_host.h> | |
24 | #include <scsi/scsi_eh.h> | |
25 | #include <scsi/scsi_device.h> | |
26 | #include <scsi/scsi_cmnd.h> | |
6521148c | 27 | #include <scsi/scsi_dbg.h> |
c6fd2807 | 28 | #include "../scsi/scsi_transport_api.h" |
ece1d636 TH |
29 | |
30 | #include <linux/libata.h> | |
31 | ||
255c03d1 | 32 | #include <trace/events/libata.h> |
ece1d636 TH |
33 | #include "libata.h" |
34 | ||
7d47e8d4 | 35 | enum { |
3884f7b0 | 36 | /* speed down verdicts */ |
7d47e8d4 TH |
37 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
38 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
39 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 40 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
41 | |
42 | /* error flags */ | |
43 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 44 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
d9027470 | 45 | ATA_EFLAG_OLD_ER = (1 << 31), |
3884f7b0 TH |
46 | |
47 | /* error categories */ | |
48 | ATA_ECAT_NONE = 0, | |
49 | ATA_ECAT_ATA_BUS = 1, | |
50 | ATA_ECAT_TOUT_HSM = 2, | |
51 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
52 | ATA_ECAT_DUBIOUS_NONE = 4, |
53 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
54 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
55 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
56 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 57 | |
87fbc5a0 TH |
58 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
59 | ||
0a2c0f56 TH |
60 | /* always put at least this amount of time between resets */ |
61 | ATA_EH_RESET_COOL_DOWN = 5000, | |
62 | ||
341c2c95 TH |
63 | /* Waiting in ->prereset can never be reliable. It's |
64 | * sometimes nice to wait there but it can't be depended upon; | |
65 | * otherwise, we wouldn't be resetting. Just give it enough | |
66 | * time for most drives to spin up. | |
67 | */ | |
68 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
69 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
70 | |
71 | ATA_EH_UA_TRIES = 5, | |
c2c7a89c TH |
72 | |
73 | /* probe speed down parameters, see ata_eh_schedule_probe() */ | |
74 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ | |
75 | ATA_EH_PROBE_TRIALS = 2, | |
31daabda TH |
76 | }; |
77 | ||
78 | /* The following table determines how we sequence resets. Each entry | |
79 | * represents timeout for that try. The first try can be soft or | |
80 | * hardreset. All others are hardreset if available. In most cases | |
81 | * the first reset w/ 10sec timeout should succeed. Following entries | |
35bf8821 DW |
82 | * are mostly for error handling, hotplug and those outlier devices that |
83 | * take an exceptionally long time to recover from reset. | |
31daabda TH |
84 | */ |
85 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
86 | 10000, /* most drives spin up by 10sec */ |
87 | 10000, /* > 99% working drives spin up before 20sec */ | |
35bf8821 | 88 | 35000, /* give > 30 secs of idleness for outlier devices */ |
341c2c95 | 89 | 5000, /* and sweet one last chance */ |
d8af0eb6 | 90 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
91 | }; |
92 | ||
87fbc5a0 TH |
93 | static const unsigned long ata_eh_identify_timeouts[] = { |
94 | 5000, /* covers > 99% of successes and not too boring on failures */ | |
95 | 10000, /* combined time till here is enough even for media access */ | |
96 | 30000, /* for true idiots */ | |
97 | ULONG_MAX, | |
98 | }; | |
99 | ||
850fef29 DLM |
100 | static const unsigned long ata_eh_revalidate_timeouts[] = { |
101 | 15000, /* Some drives are slow to read log pages when waking-up */ | |
102 | 15000, /* combined time till here is enough even for media access */ | |
103 | ULONG_MAX, | |
104 | }; | |
105 | ||
6013efd8 TH |
106 | static const unsigned long ata_eh_flush_timeouts[] = { |
107 | 15000, /* be generous with flush */ | |
108 | 15000, /* ditto */ | |
109 | 30000, /* and even more generous */ | |
110 | ULONG_MAX, | |
111 | }; | |
112 | ||
87fbc5a0 TH |
113 | static const unsigned long ata_eh_other_timeouts[] = { |
114 | 5000, /* same rationale as identify timeout */ | |
115 | 10000, /* ditto */ | |
116 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
117 | ULONG_MAX, | |
118 | }; | |
119 | ||
120 | struct ata_eh_cmd_timeout_ent { | |
121 | const u8 *commands; | |
122 | const unsigned long *timeouts; | |
123 | }; | |
124 | ||
125 | /* The following table determines timeouts to use for EH internal | |
126 | * commands. Each table entry is a command class and matches the | |
127 | * commands the entry applies to and the timeout table to use. | |
128 | * | |
129 | * On the retry after a command timed out, the next timeout value from | |
130 | * the table is used. If the table doesn't contain further entries, | |
131 | * the last value is used. | |
132 | * | |
133 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
134 | * command class, so if SET_FEATURES times out on the first try, the | |
135 | * next try will use the second timeout value only for that class. | |
136 | */ | |
137 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
138 | static const struct ata_eh_cmd_timeout_ent | |
139 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
140 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
141 | .timeouts = ata_eh_identify_timeouts, }, | |
850fef29 DLM |
142 | { .commands = CMDS(ATA_CMD_READ_LOG_EXT, ATA_CMD_READ_LOG_DMA_EXT), |
143 | .timeouts = ata_eh_revalidate_timeouts, }, | |
87fbc5a0 TH |
144 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), |
145 | .timeouts = ata_eh_other_timeouts, }, | |
146 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
147 | .timeouts = ata_eh_other_timeouts, }, | |
148 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
149 | .timeouts = ata_eh_other_timeouts, }, | |
150 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
151 | .timeouts = ata_eh_other_timeouts, }, | |
6013efd8 TH |
152 | { .commands = CMDS(ATA_CMD_FLUSH, ATA_CMD_FLUSH_EXT), |
153 | .timeouts = ata_eh_flush_timeouts }, | |
87fbc5a0 TH |
154 | }; |
155 | #undef CMDS | |
156 | ||
ad9e2762 | 157 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 158 | #ifdef CONFIG_PM |
500530f6 TH |
159 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
160 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
161 | #else /* CONFIG_PM */ |
162 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
163 | { } | |
164 | ||
165 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
166 | { } | |
6ffa01d8 | 167 | #endif /* CONFIG_PM */ |
ad9e2762 | 168 | |
0d74d872 MM |
169 | static __printf(2, 0) void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, |
170 | const char *fmt, va_list args) | |
b64bbc39 TH |
171 | { |
172 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
173 | ATA_EH_DESC_LEN - ehi->desc_len, | |
174 | fmt, args); | |
175 | } | |
176 | ||
177 | /** | |
178 | * __ata_ehi_push_desc - push error description without adding separator | |
179 | * @ehi: target EHI | |
180 | * @fmt: printf format string | |
181 | * | |
182 | * Format string according to @fmt and append it to @ehi->desc. | |
183 | * | |
184 | * LOCKING: | |
185 | * spin_lock_irqsave(host lock) | |
186 | */ | |
187 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
188 | { | |
189 | va_list args; | |
190 | ||
191 | va_start(args, fmt); | |
192 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
193 | va_end(args); | |
194 | } | |
195 | ||
196 | /** | |
197 | * ata_ehi_push_desc - push error description with separator | |
198 | * @ehi: target EHI | |
199 | * @fmt: printf format string | |
200 | * | |
201 | * Format string according to @fmt and append it to @ehi->desc. | |
202 | * If @ehi->desc is not empty, ", " is added in-between. | |
203 | * | |
204 | * LOCKING: | |
205 | * spin_lock_irqsave(host lock) | |
206 | */ | |
207 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
208 | { | |
209 | va_list args; | |
210 | ||
211 | if (ehi->desc_len) | |
212 | __ata_ehi_push_desc(ehi, ", "); | |
213 | ||
214 | va_start(args, fmt); | |
215 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
216 | va_end(args); | |
217 | } | |
218 | ||
219 | /** | |
220 | * ata_ehi_clear_desc - clean error description | |
221 | * @ehi: target EHI | |
222 | * | |
223 | * Clear @ehi->desc. | |
224 | * | |
225 | * LOCKING: | |
226 | * spin_lock_irqsave(host lock) | |
227 | */ | |
228 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
229 | { | |
230 | ehi->desc[0] = '\0'; | |
231 | ehi->desc_len = 0; | |
232 | } | |
233 | ||
cbcdd875 TH |
234 | /** |
235 | * ata_port_desc - append port description | |
236 | * @ap: target ATA port | |
237 | * @fmt: printf format string | |
238 | * | |
239 | * Format string according to @fmt and append it to port | |
240 | * description. If port description is not empty, " " is added | |
241 | * in-between. This function is to be used while initializing | |
242 | * ata_host. The description is printed on host registration. | |
243 | * | |
244 | * LOCKING: | |
245 | * None. | |
246 | */ | |
247 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
248 | { | |
249 | va_list args; | |
250 | ||
251 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
252 | ||
253 | if (ap->link.eh_info.desc_len) | |
254 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
255 | ||
256 | va_start(args, fmt); | |
257 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
258 | va_end(args); | |
259 | } | |
260 | ||
261 | #ifdef CONFIG_PCI | |
262 | ||
263 | /** | |
264 | * ata_port_pbar_desc - append PCI BAR description | |
265 | * @ap: target ATA port | |
266 | * @bar: target PCI BAR | |
267 | * @offset: offset into PCI BAR | |
268 | * @name: name of the area | |
269 | * | |
270 | * If @offset is negative, this function formats a string which | |
271 | * contains the name, address, size and type of the BAR and | |
272 | * appends it to the port description. If @offset is zero or | |
273 | * positive, only name and offsetted address is appended. | |
274 | * | |
275 | * LOCKING: | |
276 | * None. | |
277 | */ | |
278 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
279 | const char *name) | |
280 | { | |
281 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
282 | char *type = ""; | |
283 | unsigned long long start, len; | |
284 | ||
285 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
286 | type = "m"; | |
287 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
288 | type = "i"; | |
289 | ||
290 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
291 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
292 | ||
293 | if (offset < 0) | |
294 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
295 | else | |
e6a73ab1 AM |
296 | ata_port_desc(ap, "%s 0x%llx", name, |
297 | start + (unsigned long long)offset); | |
cbcdd875 TH |
298 | } |
299 | ||
300 | #endif /* CONFIG_PCI */ | |
301 | ||
87fbc5a0 TH |
302 | static int ata_lookup_timeout_table(u8 cmd) |
303 | { | |
304 | int i; | |
305 | ||
306 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
307 | const u8 *cur; | |
308 | ||
309 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
310 | if (*cur == cmd) | |
311 | return i; | |
312 | } | |
313 | ||
314 | return -1; | |
315 | } | |
316 | ||
317 | /** | |
318 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
319 | * @dev: target device | |
320 | * @cmd: internal command to be issued | |
321 | * | |
322 | * Determine timeout for internal command @cmd for @dev. | |
323 | * | |
324 | * LOCKING: | |
325 | * EH context. | |
326 | * | |
327 | * RETURNS: | |
328 | * Determined timeout. | |
329 | */ | |
330 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) | |
331 | { | |
332 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
333 | int ent = ata_lookup_timeout_table(cmd); | |
334 | int idx; | |
335 | ||
336 | if (ent < 0) | |
337 | return ATA_EH_CMD_DFL_TIMEOUT; | |
338 | ||
339 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
340 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
341 | } | |
342 | ||
343 | /** | |
344 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
345 | * @dev: target device | |
346 | * @cmd: internal command which timed out | |
347 | * | |
348 | * Notify EH that internal command @cmd for @dev timed out. This | |
349 | * function should be called only for commands whose timeouts are | |
350 | * determined using ata_internal_cmd_timeout(). | |
351 | * | |
352 | * LOCKING: | |
353 | * EH context. | |
354 | */ | |
355 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
356 | { | |
357 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
358 | int ent = ata_lookup_timeout_table(cmd); | |
359 | int idx; | |
360 | ||
361 | if (ent < 0) | |
362 | return; | |
363 | ||
364 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
365 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) | |
366 | ehc->cmd_timeout_idx[dev->devno][ent]++; | |
367 | } | |
368 | ||
3884f7b0 | 369 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
370 | unsigned int err_mask) |
371 | { | |
372 | struct ata_ering_entry *ent; | |
373 | ||
374 | WARN_ON(!err_mask); | |
375 | ||
376 | ering->cursor++; | |
377 | ering->cursor %= ATA_ERING_SIZE; | |
378 | ||
379 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 380 | ent->eflags = eflags; |
0c247c55 TH |
381 | ent->err_mask = err_mask; |
382 | ent->timestamp = get_jiffies_64(); | |
383 | } | |
384 | ||
76326ac1 TH |
385 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
386 | { | |
387 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
388 | ||
389 | if (ent->err_mask) | |
390 | return ent; | |
391 | return NULL; | |
392 | } | |
393 | ||
d9027470 GG |
394 | int ata_ering_map(struct ata_ering *ering, |
395 | int (*map_fn)(struct ata_ering_entry *, void *), | |
396 | void *arg) | |
0c247c55 TH |
397 | { |
398 | int idx, rc = 0; | |
399 | struct ata_ering_entry *ent; | |
400 | ||
401 | idx = ering->cursor; | |
402 | do { | |
403 | ent = &ering->ring[idx]; | |
404 | if (!ent->err_mask) | |
405 | break; | |
406 | rc = map_fn(ent, arg); | |
407 | if (rc) | |
408 | break; | |
409 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
410 | } while (idx != ering->cursor); | |
411 | ||
412 | return rc; | |
413 | } | |
414 | ||
60428407 | 415 | static int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg) |
d9027470 GG |
416 | { |
417 | ent->eflags |= ATA_EFLAG_OLD_ER; | |
418 | return 0; | |
419 | } | |
420 | ||
421 | static void ata_ering_clear(struct ata_ering *ering) | |
422 | { | |
423 | ata_ering_map(ering, ata_ering_clear_cb, NULL); | |
424 | } | |
425 | ||
64f65ca6 TH |
426 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
427 | { | |
9af5c9c9 | 428 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
429 | |
430 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
431 | } | |
432 | ||
f58229f8 | 433 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
434 | struct ata_eh_info *ehi, unsigned int action) |
435 | { | |
f58229f8 | 436 | struct ata_device *tdev; |
af181c2d TH |
437 | |
438 | if (!dev) { | |
439 | ehi->action &= ~action; | |
1eca4365 | 440 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 441 | ehi->dev_action[tdev->devno] &= ~action; |
af181c2d TH |
442 | } else { |
443 | /* doesn't make sense for port-wide EH actions */ | |
444 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
445 | ||
446 | /* break ehi->action into ehi->dev_action */ | |
447 | if (ehi->action & action) { | |
1eca4365 | 448 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
449 | ehi->dev_action[tdev->devno] |= |
450 | ehi->action & action; | |
af181c2d TH |
451 | ehi->action &= ~action; |
452 | } | |
453 | ||
454 | /* turn off the specified per-dev action */ | |
455 | ehi->dev_action[dev->devno] &= ~action; | |
456 | } | |
457 | } | |
458 | ||
c0c362b6 TH |
459 | /** |
460 | * ata_eh_acquire - acquire EH ownership | |
461 | * @ap: ATA port to acquire EH ownership for | |
462 | * | |
463 | * Acquire EH ownership for @ap. This is the basic exclusion | |
464 | * mechanism for ports sharing a host. Only one port hanging off | |
465 | * the same host can claim the ownership of EH. | |
466 | * | |
467 | * LOCKING: | |
468 | * EH context. | |
469 | */ | |
470 | void ata_eh_acquire(struct ata_port *ap) | |
471 | { | |
472 | mutex_lock(&ap->host->eh_mutex); | |
473 | WARN_ON_ONCE(ap->host->eh_owner); | |
474 | ap->host->eh_owner = current; | |
475 | } | |
476 | ||
477 | /** | |
478 | * ata_eh_release - release EH ownership | |
479 | * @ap: ATA port to release EH ownership for | |
480 | * | |
481 | * Release EH ownership for @ap if the caller. The caller must | |
482 | * have acquired EH ownership using ata_eh_acquire() previously. | |
483 | * | |
484 | * LOCKING: | |
485 | * EH context. | |
486 | */ | |
487 | void ata_eh_release(struct ata_port *ap) | |
488 | { | |
489 | WARN_ON_ONCE(ap->host->eh_owner != current); | |
490 | ap->host->eh_owner = NULL; | |
491 | mutex_unlock(&ap->host->eh_mutex); | |
492 | } | |
493 | ||
ece180d1 TH |
494 | static void ata_eh_unload(struct ata_port *ap) |
495 | { | |
496 | struct ata_link *link; | |
497 | struct ata_device *dev; | |
498 | unsigned long flags; | |
499 | ||
500 | /* Restore SControl IPM and SPD for the next driver and | |
501 | * disable attached devices. | |
502 | */ | |
503 | ata_for_each_link(link, ap, PMP_FIRST) { | |
504 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
505 | ata_for_each_dev(dev, link, ALL) | |
506 | ata_dev_disable(dev); | |
507 | } | |
508 | ||
509 | /* freeze and set UNLOADED */ | |
510 | spin_lock_irqsave(ap->lock, flags); | |
511 | ||
512 | ata_port_freeze(ap); /* won't be thawed */ | |
513 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
514 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
515 | ||
516 | spin_unlock_irqrestore(ap->lock, flags); | |
517 | } | |
518 | ||
ece1d636 TH |
519 | /** |
520 | * ata_scsi_error - SCSI layer error handler callback | |
521 | * @host: SCSI host on which error occurred | |
522 | * | |
523 | * Handles SCSI-layer-thrown error events. | |
524 | * | |
525 | * LOCKING: | |
526 | * Inherited from SCSI layer (none, can sleep) | |
527 | * | |
528 | * RETURNS: | |
529 | * Zero. | |
530 | */ | |
381544bb | 531 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 532 | { |
35bb94b1 | 533 | struct ata_port *ap = ata_shost_to_port(host); |
ad9e2762 | 534 | unsigned long flags; |
c34aeebc | 535 | LIST_HEAD(eh_work_q); |
ece1d636 TH |
536 | |
537 | DPRINTK("ENTER\n"); | |
538 | ||
c34aeebc JB |
539 | spin_lock_irqsave(host->host_lock, flags); |
540 | list_splice_init(&host->eh_cmd_q, &eh_work_q); | |
541 | spin_unlock_irqrestore(host->host_lock, flags); | |
542 | ||
0e0b494c JB |
543 | ata_scsi_cmd_error_handler(host, ap, &eh_work_q); |
544 | ||
545 | /* If we timed raced normal completion and there is nothing to | |
546 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ | |
547 | ata_scsi_port_error_handler(host, ap); | |
548 | ||
549 | /* finish or retry handled scmd's and clean up */ | |
72d8c36e | 550 | WARN_ON(!list_empty(&eh_work_q)); |
0e0b494c JB |
551 | |
552 | DPRINTK("EXIT\n"); | |
553 | } | |
554 | ||
555 | /** | |
556 | * ata_scsi_cmd_error_handler - error callback for a list of commands | |
557 | * @host: scsi host containing the port | |
558 | * @ap: ATA port within the host | |
559 | * @eh_work_q: list of commands to process | |
560 | * | |
561 | * process the given list of commands and return those finished to the | |
562 | * ap->eh_done_q. This function is the first part of the libata error | |
563 | * handler which processes a given list of failed commands. | |
564 | */ | |
565 | void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, | |
566 | struct list_head *eh_work_q) | |
567 | { | |
568 | int i; | |
569 | unsigned long flags; | |
570 | ||
c429137a TH |
571 | /* make sure sff pio task is not running */ |
572 | ata_sff_flush_pio_task(ap); | |
ece1d636 | 573 | |
cca3974e | 574 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
575 | |
576 | /* For new EH, all qcs are finished in one of three ways - | |
577 | * normal completion, error completion, and SCSI timeout. | |
c96f1732 | 578 | * Both completions can race against SCSI timeout. When normal |
ad9e2762 TH |
579 | * completion wins, the qc never reaches EH. When error |
580 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
581 | * | |
582 | * When SCSI timeout wins, things are a bit more complex. | |
583 | * Normal or error completion can occur after the timeout but | |
584 | * before this point. In such cases, both types of | |
585 | * completions are honored. A scmd is determined to have | |
586 | * timed out iff its associated qc is active and not failed. | |
587 | */ | |
a4f08141 | 588 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 TH |
589 | if (ap->ops->error_handler) { |
590 | struct scsi_cmnd *scmd, *tmp; | |
591 | int nr_timedout = 0; | |
592 | ||
c96f1732 AC |
593 | /* This must occur under the ap->lock as we don't want |
594 | a polled recovery to race the real interrupt handler | |
d9027470 | 595 | |
c96f1732 AC |
596 | The lost_interrupt handler checks for any completed but |
597 | non-notified command and completes much like an IRQ handler. | |
d9027470 | 598 | |
c96f1732 AC |
599 | We then fall into the error recovery code which will treat |
600 | this as if normal completion won the race */ | |
601 | ||
602 | if (ap->ops->lost_interrupt) | |
603 | ap->ops->lost_interrupt(ap); | |
d9027470 | 604 | |
0e0b494c | 605 | list_for_each_entry_safe(scmd, tmp, eh_work_q, eh_entry) { |
ad9e2762 TH |
606 | struct ata_queued_cmd *qc; |
607 | ||
258c4e5c | 608 | ata_qc_for_each_raw(ap, qc, i) { |
ad9e2762 TH |
609 | if (qc->flags & ATA_QCFLAG_ACTIVE && |
610 | qc->scsicmd == scmd) | |
611 | break; | |
612 | } | |
613 | ||
614 | if (i < ATA_MAX_QUEUE) { | |
615 | /* the scmd has an associated qc */ | |
616 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
617 | /* which hasn't failed yet, timeout */ | |
618 | qc->err_mask |= AC_ERR_TIMEOUT; | |
619 | qc->flags |= ATA_QCFLAG_FAILED; | |
620 | nr_timedout++; | |
621 | } | |
622 | } else { | |
623 | /* Normal completion occurred after | |
624 | * SCSI timeout but before this point. | |
625 | * Successfully complete it. | |
626 | */ | |
627 | scmd->retries = scmd->allowed; | |
628 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
629 | } | |
630 | } | |
631 | ||
632 | /* If we have timed out qcs. They belong to EH from | |
633 | * this point but the state of the controller is | |
634 | * unknown. Freeze the port to make sure the IRQ | |
635 | * handler doesn't diddle with those qcs. This must | |
636 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
637 | */ | |
638 | if (nr_timedout) | |
639 | __ata_port_freeze(ap); | |
640 | ||
a1e10f7e TH |
641 | |
642 | /* initialize eh_tries */ | |
643 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
a4f08141 PM |
644 | } |
645 | spin_unlock_irqrestore(ap->lock, flags); | |
d9027470 | 646 | |
0e0b494c JB |
647 | } |
648 | EXPORT_SYMBOL(ata_scsi_cmd_error_handler); | |
649 | ||
650 | /** | |
651 | * ata_scsi_port_error_handler - recover the port after the commands | |
652 | * @host: SCSI host containing the port | |
653 | * @ap: the ATA port | |
654 | * | |
655 | * Handle the recovery of the port @ap after all the commands | |
656 | * have been recovered. | |
657 | */ | |
658 | void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap) | |
659 | { | |
660 | unsigned long flags; | |
ad9e2762 | 661 | |
ad9e2762 TH |
662 | /* invoke error handler */ |
663 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
664 | struct ata_link *link; |
665 | ||
c0c362b6 TH |
666 | /* acquire EH ownership */ |
667 | ata_eh_acquire(ap); | |
668 | repeat: | |
5ddf24c5 TH |
669 | /* kill fast drain timer */ |
670 | del_timer_sync(&ap->fastdrain_timer); | |
671 | ||
500530f6 TH |
672 | /* process port resume request */ |
673 | ata_eh_handle_port_resume(ap); | |
674 | ||
f3e81b19 | 675 | /* fetch & clear EH info */ |
e30349d2 | 676 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 677 | |
1eca4365 | 678 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
679 | struct ata_eh_context *ehc = &link->eh_context; |
680 | struct ata_device *dev; | |
681 | ||
cf1b86c8 TH |
682 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
683 | link->eh_context.i = link->eh_info; | |
684 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 685 | |
1eca4365 | 686 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
687 | int devno = dev->devno; |
688 | ||
689 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
690 | if (ata_ncq_enabled(dev)) | |
691 | ehc->saved_ncq_enabled |= 1 << devno; | |
692 | } | |
cf1b86c8 | 693 | } |
f3e81b19 | 694 | |
b51e9e5d TH |
695 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
696 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 697 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 698 | |
e30349d2 | 699 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 700 | |
500530f6 TH |
701 | /* invoke EH, skip if unloading or suspended */ |
702 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 703 | ap->ops->error_handler(ap); |
ece180d1 TH |
704 | else { |
705 | /* if unloading, commence suicide */ | |
706 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
707 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
708 | ata_eh_unload(ap); | |
720ba126 | 709 | ata_eh_finish(ap); |
ece180d1 | 710 | } |
ad9e2762 | 711 | |
500530f6 TH |
712 | /* process port suspend request */ |
713 | ata_eh_handle_port_suspend(ap); | |
714 | ||
25985edc | 715 | /* Exception might have happened after ->error_handler |
ad9e2762 TH |
716 | * recovered the port but before this point. Repeat |
717 | * EH in such case. | |
718 | */ | |
e30349d2 | 719 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 720 | |
b51e9e5d | 721 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 722 | if (--ap->eh_tries) { |
e30349d2 | 723 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
724 | goto repeat; |
725 | } | |
a9a79dfe JP |
726 | ata_port_err(ap, |
727 | "EH pending after %d tries, giving up\n", | |
728 | ATA_EH_MAX_TRIES); | |
914616a3 | 729 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
730 | } |
731 | ||
f3e81b19 | 732 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 733 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 734 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 735 | |
e4a9c373 DW |
736 | /* end eh (clear host_eh_scheduled) while holding |
737 | * ap->lock such that if exception occurs after this | |
738 | * point but before EH completion, SCSI midlayer will | |
ad9e2762 TH |
739 | * re-initiate EH. |
740 | */ | |
e4a9c373 | 741 | ap->ops->end_eh(ap); |
ad9e2762 | 742 | |
e30349d2 | 743 | spin_unlock_irqrestore(ap->lock, flags); |
c0c362b6 | 744 | ata_eh_release(ap); |
ad9e2762 | 745 | } else { |
9af5c9c9 | 746 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
747 | ap->ops->eng_timeout(ap); |
748 | } | |
ece1d636 | 749 | |
ece1d636 TH |
750 | scsi_eh_flush_done_q(&ap->eh_done_q); |
751 | ||
ad9e2762 | 752 | /* clean up */ |
e30349d2 | 753 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 754 | |
1cdaf534 | 755 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 756 | ap->pflags &= ~ATA_PFLAG_LOADING; |
6f54120e JY |
757 | else if ((ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) && |
758 | !(ap->flags & ATA_FLAG_SAS_HOST)) | |
ad72cf98 | 759 | schedule_delayed_work(&ap->hotplug_task, 0); |
1cdaf534 TH |
760 | |
761 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
a9a79dfe | 762 | ata_port_info(ap, "EH complete\n"); |
580b2102 | 763 | |
b51e9e5d | 764 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 765 | |
c6cf9e99 | 766 | /* tell wait_eh that we're done */ |
b51e9e5d | 767 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
768 | wake_up_all(&ap->eh_wait_q); |
769 | ||
e30349d2 | 770 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 771 | } |
0e0b494c | 772 | EXPORT_SYMBOL_GPL(ata_scsi_port_error_handler); |
ece1d636 | 773 | |
c6cf9e99 TH |
774 | /** |
775 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
776 | * @ap: Port to wait EH for | |
777 | * | |
778 | * Wait until the currently pending EH is complete. | |
779 | * | |
780 | * LOCKING: | |
781 | * Kernel thread context (may sleep). | |
782 | */ | |
783 | void ata_port_wait_eh(struct ata_port *ap) | |
784 | { | |
785 | unsigned long flags; | |
786 | DEFINE_WAIT(wait); | |
787 | ||
788 | retry: | |
ba6a1308 | 789 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 790 | |
b51e9e5d | 791 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 792 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 793 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 794 | schedule(); |
ba6a1308 | 795 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 796 | } |
0a1b622e | 797 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 798 | |
ba6a1308 | 799 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
800 | |
801 | /* make sure SCSI EH is complete */ | |
cca3974e | 802 | if (scsi_host_in_recovery(ap->scsi_host)) { |
97750ceb | 803 | ata_msleep(ap, 10); |
c6cf9e99 TH |
804 | goto retry; |
805 | } | |
806 | } | |
81c757bc | 807 | EXPORT_SYMBOL_GPL(ata_port_wait_eh); |
c6cf9e99 | 808 | |
5ddf24c5 TH |
809 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
810 | { | |
258c4e5c | 811 | struct ata_queued_cmd *qc; |
5ddf24c5 TH |
812 | unsigned int tag; |
813 | int nr = 0; | |
814 | ||
815 | /* count only non-internal commands */ | |
258c4e5c JA |
816 | ata_qc_for_each(ap, qc, tag) { |
817 | if (qc) | |
5ddf24c5 | 818 | nr++; |
9d207acc | 819 | } |
5ddf24c5 TH |
820 | |
821 | return nr; | |
822 | } | |
823 | ||
b93ab338 | 824 | void ata_eh_fastdrain_timerfn(struct timer_list *t) |
5ddf24c5 | 825 | { |
b93ab338 | 826 | struct ata_port *ap = from_timer(ap, t, fastdrain_timer); |
5ddf24c5 TH |
827 | unsigned long flags; |
828 | int cnt; | |
829 | ||
830 | spin_lock_irqsave(ap->lock, flags); | |
831 | ||
832 | cnt = ata_eh_nr_in_flight(ap); | |
833 | ||
834 | /* are we done? */ | |
835 | if (!cnt) | |
836 | goto out_unlock; | |
837 | ||
838 | if (cnt == ap->fastdrain_cnt) { | |
258c4e5c | 839 | struct ata_queued_cmd *qc; |
5ddf24c5 TH |
840 | unsigned int tag; |
841 | ||
842 | /* No progress during the last interval, tag all | |
843 | * in-flight qcs as timed out and freeze the port. | |
844 | */ | |
258c4e5c | 845 | ata_qc_for_each(ap, qc, tag) { |
5ddf24c5 TH |
846 | if (qc) |
847 | qc->err_mask |= AC_ERR_TIMEOUT; | |
848 | } | |
849 | ||
850 | ata_port_freeze(ap); | |
851 | } else { | |
852 | /* some qcs have finished, give it another chance */ | |
853 | ap->fastdrain_cnt = cnt; | |
854 | ap->fastdrain_timer.expires = | |
341c2c95 | 855 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
856 | add_timer(&ap->fastdrain_timer); |
857 | } | |
858 | ||
859 | out_unlock: | |
860 | spin_unlock_irqrestore(ap->lock, flags); | |
861 | } | |
862 | ||
863 | /** | |
864 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
865 | * @ap: target ATA port | |
866 | * @fastdrain: activate fast drain | |
867 | * | |
868 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
869 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
870 | * that EH kicks in in timely manner. | |
871 | * | |
872 | * LOCKING: | |
873 | * spin_lock_irqsave(host lock) | |
874 | */ | |
875 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
876 | { | |
877 | int cnt; | |
878 | ||
879 | /* already scheduled? */ | |
880 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
881 | return; | |
882 | ||
883 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
884 | ||
885 | if (!fastdrain) | |
886 | return; | |
887 | ||
888 | /* do we have in-flight qcs? */ | |
889 | cnt = ata_eh_nr_in_flight(ap); | |
890 | if (!cnt) | |
891 | return; | |
892 | ||
893 | /* activate fast drain */ | |
894 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
895 | ap->fastdrain_timer.expires = |
896 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
897 | add_timer(&ap->fastdrain_timer); |
898 | } | |
899 | ||
f686bcb8 TH |
900 | /** |
901 | * ata_qc_schedule_eh - schedule qc for error handling | |
902 | * @qc: command to schedule error handling for | |
903 | * | |
904 | * Schedule error handling for @qc. EH will kick in as soon as | |
905 | * other commands are drained. | |
906 | * | |
907 | * LOCKING: | |
cca3974e | 908 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
909 | */ |
910 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
911 | { | |
912 | struct ata_port *ap = qc->ap; | |
913 | ||
914 | WARN_ON(!ap->ops->error_handler); | |
915 | ||
916 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 917 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
918 | |
919 | /* The following will fail if timeout has already expired. | |
920 | * ata_scsi_error() takes care of such scmds on EH entry. | |
921 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
922 | * this function completes. | |
923 | */ | |
242f9dcb | 924 | blk_abort_request(qc->scsicmd->request); |
f686bcb8 TH |
925 | } |
926 | ||
7b70fc03 | 927 | /** |
e4a9c373 DW |
928 | * ata_std_sched_eh - non-libsas ata_ports issue eh with this common routine |
929 | * @ap: ATA port to schedule EH for | |
7b70fc03 | 930 | * |
e4a9c373 | 931 | * LOCKING: inherited from ata_port_schedule_eh |
cca3974e | 932 | * spin_lock_irqsave(host lock) |
7b70fc03 | 933 | */ |
e4a9c373 | 934 | void ata_std_sched_eh(struct ata_port *ap) |
7b70fc03 TH |
935 | { |
936 | WARN_ON(!ap->ops->error_handler); | |
937 | ||
f4d6d004 TH |
938 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
939 | return; | |
940 | ||
5ddf24c5 | 941 | ata_eh_set_pending(ap, 1); |
cca3974e | 942 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
943 | |
944 | DPRINTK("port EH scheduled\n"); | |
945 | } | |
e4a9c373 DW |
946 | EXPORT_SYMBOL_GPL(ata_std_sched_eh); |
947 | ||
948 | /** | |
949 | * ata_std_end_eh - non-libsas ata_ports complete eh with this common routine | |
950 | * @ap: ATA port to end EH for | |
951 | * | |
952 | * In the libata object model there is a 1:1 mapping of ata_port to | |
953 | * shost, so host fields can be directly manipulated under ap->lock, in | |
954 | * the libsas case we need to hold a lock at the ha->level to coordinate | |
955 | * these events. | |
956 | * | |
957 | * LOCKING: | |
958 | * spin_lock_irqsave(host lock) | |
959 | */ | |
960 | void ata_std_end_eh(struct ata_port *ap) | |
961 | { | |
962 | struct Scsi_Host *host = ap->scsi_host; | |
963 | ||
964 | host->host_eh_scheduled = 0; | |
965 | } | |
966 | EXPORT_SYMBOL(ata_std_end_eh); | |
967 | ||
968 | ||
969 | /** | |
970 | * ata_port_schedule_eh - schedule error handling without a qc | |
971 | * @ap: ATA port to schedule EH for | |
972 | * | |
973 | * Schedule error handling for @ap. EH will kick in as soon as | |
974 | * all commands are drained. | |
975 | * | |
976 | * LOCKING: | |
977 | * spin_lock_irqsave(host lock) | |
978 | */ | |
979 | void ata_port_schedule_eh(struct ata_port *ap) | |
980 | { | |
981 | /* see: ata_std_sched_eh, unless you know better */ | |
982 | ap->ops->sched_eh(ap); | |
983 | } | |
7b70fc03 | 984 | |
dbd82616 | 985 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 | 986 | { |
258c4e5c | 987 | struct ata_queued_cmd *qc; |
7b70fc03 TH |
988 | int tag, nr_aborted = 0; |
989 | ||
990 | WARN_ON(!ap->ops->error_handler); | |
991 | ||
5ddf24c5 TH |
992 | /* we're gonna abort all commands, no need for fast drain */ |
993 | ata_eh_set_pending(ap, 0); | |
994 | ||
28361c40 | 995 | /* include internal tag in iteration */ |
258c4e5c | 996 | ata_qc_for_each_with_internal(ap, qc, tag) { |
dbd82616 | 997 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
998 | qc->flags |= ATA_QCFLAG_FAILED; |
999 | ata_qc_complete(qc); | |
1000 | nr_aborted++; | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | if (!nr_aborted) | |
1005 | ata_port_schedule_eh(ap); | |
1006 | ||
1007 | return nr_aborted; | |
1008 | } | |
1009 | ||
dbd82616 TH |
1010 | /** |
1011 | * ata_link_abort - abort all qc's on the link | |
1012 | * @link: ATA link to abort qc's for | |
1013 | * | |
1014 | * Abort all active qc's active on @link and schedule EH. | |
1015 | * | |
1016 | * LOCKING: | |
1017 | * spin_lock_irqsave(host lock) | |
1018 | * | |
1019 | * RETURNS: | |
1020 | * Number of aborted qc's. | |
1021 | */ | |
1022 | int ata_link_abort(struct ata_link *link) | |
1023 | { | |
1024 | return ata_do_link_abort(link->ap, link); | |
1025 | } | |
1026 | ||
1027 | /** | |
1028 | * ata_port_abort - abort all qc's on the port | |
1029 | * @ap: ATA port to abort qc's for | |
1030 | * | |
1031 | * Abort all active qc's of @ap and schedule EH. | |
1032 | * | |
1033 | * LOCKING: | |
1034 | * spin_lock_irqsave(host_set lock) | |
1035 | * | |
1036 | * RETURNS: | |
1037 | * Number of aborted qc's. | |
1038 | */ | |
1039 | int ata_port_abort(struct ata_port *ap) | |
1040 | { | |
1041 | return ata_do_link_abort(ap, NULL); | |
1042 | } | |
1043 | ||
e3180499 TH |
1044 | /** |
1045 | * __ata_port_freeze - freeze port | |
1046 | * @ap: ATA port to freeze | |
1047 | * | |
1048 | * This function is called when HSM violation or some other | |
1049 | * condition disrupts normal operation of the port. Frozen port | |
1050 | * is not allowed to perform any operation until the port is | |
1051 | * thawed, which usually follows a successful reset. | |
1052 | * | |
1053 | * ap->ops->freeze() callback can be used for freezing the port | |
1054 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
1055 | * port cannot be frozen hardware-wise, the interrupt handler | |
1056 | * must ack and clear interrupts unconditionally while the port | |
1057 | * is frozen. | |
1058 | * | |
1059 | * LOCKING: | |
cca3974e | 1060 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1061 | */ |
1062 | static void __ata_port_freeze(struct ata_port *ap) | |
1063 | { | |
1064 | WARN_ON(!ap->ops->error_handler); | |
1065 | ||
1066 | if (ap->ops->freeze) | |
1067 | ap->ops->freeze(ap); | |
1068 | ||
b51e9e5d | 1069 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 1070 | |
44877b4e | 1071 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
1072 | } |
1073 | ||
1074 | /** | |
1075 | * ata_port_freeze - abort & freeze port | |
1076 | * @ap: ATA port to freeze | |
1077 | * | |
54c38444 JG |
1078 | * Abort and freeze @ap. The freeze operation must be called |
1079 | * first, because some hardware requires special operations | |
1080 | * before the taskfile registers are accessible. | |
e3180499 TH |
1081 | * |
1082 | * LOCKING: | |
cca3974e | 1083 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1084 | * |
1085 | * RETURNS: | |
1086 | * Number of aborted commands. | |
1087 | */ | |
1088 | int ata_port_freeze(struct ata_port *ap) | |
1089 | { | |
1090 | int nr_aborted; | |
1091 | ||
1092 | WARN_ON(!ap->ops->error_handler); | |
1093 | ||
e3180499 | 1094 | __ata_port_freeze(ap); |
54c38444 | 1095 | nr_aborted = ata_port_abort(ap); |
e3180499 TH |
1096 | |
1097 | return nr_aborted; | |
1098 | } | |
1099 | ||
7d77b247 TH |
1100 | /** |
1101 | * sata_async_notification - SATA async notification handler | |
1102 | * @ap: ATA port where async notification is received | |
1103 | * | |
1104 | * Handler to be called when async notification via SDB FIS is | |
1105 | * received. This function schedules EH if necessary. | |
1106 | * | |
1107 | * LOCKING: | |
1108 | * spin_lock_irqsave(host lock) | |
1109 | * | |
1110 | * RETURNS: | |
1111 | * 1 if EH is scheduled, 0 otherwise. | |
1112 | */ | |
1113 | int sata_async_notification(struct ata_port *ap) | |
1114 | { | |
1115 | u32 sntf; | |
1116 | int rc; | |
1117 | ||
1118 | if (!(ap->flags & ATA_FLAG_AN)) | |
1119 | return 0; | |
1120 | ||
1121 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
1122 | if (rc == 0) | |
1123 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1124 | ||
071f44b1 | 1125 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1126 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1127 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1128 | /* PMP is not attached. Check whether ATAPI |
1129 | * AN is configured. If so, notify media | |
1130 | * change. | |
1131 | */ | |
1132 | struct ata_device *dev = ap->link.device; | |
1133 | ||
1134 | if ((dev->class == ATA_DEV_ATAPI) && | |
1135 | (dev->flags & ATA_DFLAG_AN)) | |
1136 | ata_scsi_media_change_notify(dev); | |
1137 | return 0; | |
1138 | } else { | |
1139 | /* PMP is attached but SNTF is not available. | |
1140 | * ATAPI async media change notification is | |
1141 | * not used. The PMP must be reporting PHY | |
1142 | * status change, schedule EH. | |
1143 | */ | |
1144 | ata_port_schedule_eh(ap); | |
1145 | return 1; | |
1146 | } | |
1147 | } else { | |
1148 | /* PMP is attached and SNTF is available */ | |
1149 | struct ata_link *link; | |
1150 | ||
1151 | /* check and notify ATAPI AN */ | |
1eca4365 | 1152 | ata_for_each_link(link, ap, EDGE) { |
7d77b247 TH |
1153 | if (!(sntf & (1 << link->pmp))) |
1154 | continue; | |
1155 | ||
1156 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1157 | (link->device->flags & ATA_DFLAG_AN)) | |
1158 | ata_scsi_media_change_notify(link->device); | |
1159 | } | |
1160 | ||
1161 | /* If PMP is reporting that PHY status of some | |
1162 | * downstream ports has changed, schedule EH. | |
1163 | */ | |
1164 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1165 | ata_port_schedule_eh(ap); | |
1166 | return 1; | |
1167 | } | |
1168 | ||
1169 | return 0; | |
1170 | } | |
1171 | } | |
1172 | ||
e3180499 TH |
1173 | /** |
1174 | * ata_eh_freeze_port - EH helper to freeze port | |
1175 | * @ap: ATA port to freeze | |
1176 | * | |
1177 | * Freeze @ap. | |
1178 | * | |
1179 | * LOCKING: | |
1180 | * None. | |
1181 | */ | |
1182 | void ata_eh_freeze_port(struct ata_port *ap) | |
1183 | { | |
1184 | unsigned long flags; | |
1185 | ||
1186 | if (!ap->ops->error_handler) | |
1187 | return; | |
1188 | ||
ba6a1308 | 1189 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1190 | __ata_port_freeze(ap); |
ba6a1308 | 1191 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1192 | } |
1193 | ||
1194 | /** | |
1195 | * ata_port_thaw_port - EH helper to thaw port | |
1196 | * @ap: ATA port to thaw | |
1197 | * | |
1198 | * Thaw frozen port @ap. | |
1199 | * | |
1200 | * LOCKING: | |
1201 | * None. | |
1202 | */ | |
1203 | void ata_eh_thaw_port(struct ata_port *ap) | |
1204 | { | |
1205 | unsigned long flags; | |
1206 | ||
1207 | if (!ap->ops->error_handler) | |
1208 | return; | |
1209 | ||
ba6a1308 | 1210 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1211 | |
b51e9e5d | 1212 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1213 | |
1214 | if (ap->ops->thaw) | |
1215 | ap->ops->thaw(ap); | |
1216 | ||
ba6a1308 | 1217 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1218 | |
44877b4e | 1219 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1220 | } |
1221 | ||
ece1d636 TH |
1222 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1223 | { | |
1224 | /* nada */ | |
1225 | } | |
1226 | ||
1227 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1228 | { | |
1229 | struct ata_port *ap = qc->ap; | |
1230 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1231 | unsigned long flags; | |
1232 | ||
ba6a1308 | 1233 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1234 | qc->scsidone = ata_eh_scsidone; |
1235 | __ata_qc_complete(qc); | |
1236 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1237 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1238 | |
1239 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1240 | } | |
1241 | ||
1242 | /** | |
1243 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1244 | * @qc: Command to complete | |
1245 | * | |
1246 | * Indicate to the mid and upper layers that an ATA command has | |
1247 | * completed. To be used from EH. | |
1248 | */ | |
1249 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1250 | { | |
1251 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1252 | scmd->retries = scmd->allowed; | |
1253 | __ata_eh_qc_complete(qc); | |
1254 | } | |
1255 | ||
1256 | /** | |
1257 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1258 | * @qc: Command to retry | |
1259 | * | |
1260 | * Indicate to the mid and upper layers that an ATA command | |
1261 | * should be retried. To be used from EH. | |
1262 | * | |
1263 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
f13e2201 | 1264 | * scmd->allowed is incremented for commands which get retried |
ece1d636 TH |
1265 | * due to unrelated failures (qc->err_mask is zero). |
1266 | */ | |
1267 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1268 | { | |
1269 | struct scsi_cmnd *scmd = qc->scsicmd; | |
f13e2201 GG |
1270 | if (!qc->err_mask) |
1271 | scmd->allowed++; | |
ece1d636 TH |
1272 | __ata_eh_qc_complete(qc); |
1273 | } | |
022bdb07 | 1274 | |
678afac6 TH |
1275 | /** |
1276 | * ata_dev_disable - disable ATA device | |
1277 | * @dev: ATA device to disable | |
1278 | * | |
1279 | * Disable @dev. | |
1280 | * | |
1281 | * Locking: | |
1282 | * EH context. | |
1283 | */ | |
1284 | void ata_dev_disable(struct ata_device *dev) | |
1285 | { | |
1286 | if (!ata_dev_enabled(dev)) | |
1287 | return; | |
1288 | ||
1289 | if (ata_msg_drv(dev->link->ap)) | |
a9a79dfe | 1290 | ata_dev_warn(dev, "disabled\n"); |
678afac6 TH |
1291 | ata_acpi_on_disable(dev); |
1292 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1293 | dev->class++; | |
99cf610a TH |
1294 | |
1295 | /* From now till the next successful probe, ering is used to | |
1296 | * track probe failures. Clear accumulated device error info. | |
1297 | */ | |
1298 | ata_ering_clear(&dev->ering); | |
678afac6 TH |
1299 | } |
1300 | ||
0ea035a3 TH |
1301 | /** |
1302 | * ata_eh_detach_dev - detach ATA device | |
1303 | * @dev: ATA device to detach | |
1304 | * | |
1305 | * Detach @dev. | |
1306 | * | |
1307 | * LOCKING: | |
1308 | * None. | |
1309 | */ | |
fb7fd614 | 1310 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1311 | { |
f58229f8 TH |
1312 | struct ata_link *link = dev->link; |
1313 | struct ata_port *ap = link->ap; | |
90484ebf | 1314 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1315 | unsigned long flags; |
1316 | ||
1317 | ata_dev_disable(dev); | |
1318 | ||
ba6a1308 | 1319 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1320 | |
1321 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1322 | ||
1323 | if (ata_scsi_offline_dev(dev)) { | |
1324 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1325 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1326 | } |
1327 | ||
90484ebf | 1328 | /* clear per-dev EH info */ |
f58229f8 TH |
1329 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1330 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1331 | ehc->saved_xfer_mode[dev->devno] = 0; |
1332 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1333 | |
ba6a1308 | 1334 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1335 | } |
1336 | ||
022bdb07 TH |
1337 | /** |
1338 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1339 | * @link: target ATA link |
47005f25 | 1340 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1341 | * @action: action about to be performed |
1342 | * | |
1343 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1344 | * in @link->eh_info such that eh actions are not unnecessarily |
1345 | * repeated. | |
022bdb07 TH |
1346 | * |
1347 | * LOCKING: | |
1348 | * None. | |
1349 | */ | |
fb7fd614 TH |
1350 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1351 | unsigned int action) | |
022bdb07 | 1352 | { |
955e57df TH |
1353 | struct ata_port *ap = link->ap; |
1354 | struct ata_eh_info *ehi = &link->eh_info; | |
1355 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1356 | unsigned long flags; |
1357 | ||
ba6a1308 | 1358 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1359 | |
955e57df | 1360 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1361 | |
a568d1d2 TH |
1362 | /* About to take EH action, set RECOVERED. Ignore actions on |
1363 | * slave links as master will do them again. | |
1364 | */ | |
1365 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1366 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1367 | ||
ba6a1308 | 1368 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1369 | } |
1370 | ||
47005f25 TH |
1371 | /** |
1372 | * ata_eh_done - EH action complete | |
2f60e1ab | 1373 | * @link: ATA link for which EH actions are complete |
47005f25 TH |
1374 | * @dev: target ATA dev for per-dev action (can be NULL) |
1375 | * @action: action just completed | |
1376 | * | |
1377 | * Called right after performing EH actions to clear related bits | |
955e57df | 1378 | * in @link->eh_context. |
47005f25 TH |
1379 | * |
1380 | * LOCKING: | |
1381 | * None. | |
1382 | */ | |
fb7fd614 TH |
1383 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1384 | unsigned int action) | |
47005f25 | 1385 | { |
955e57df | 1386 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1387 | |
955e57df | 1388 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1389 | } |
1390 | ||
022bdb07 TH |
1391 | /** |
1392 | * ata_err_string - convert err_mask to descriptive string | |
1393 | * @err_mask: error mask to convert to string | |
1394 | * | |
1395 | * Convert @err_mask to descriptive string. Errors are | |
1396 | * prioritized according to severity and only the most severe | |
1397 | * error is reported. | |
1398 | * | |
1399 | * LOCKING: | |
1400 | * None. | |
1401 | * | |
1402 | * RETURNS: | |
1403 | * Descriptive string for @err_mask | |
1404 | */ | |
2dcb407e | 1405 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1406 | { |
1407 | if (err_mask & AC_ERR_HOST_BUS) | |
1408 | return "host bus error"; | |
1409 | if (err_mask & AC_ERR_ATA_BUS) | |
1410 | return "ATA bus error"; | |
1411 | if (err_mask & AC_ERR_TIMEOUT) | |
1412 | return "timeout"; | |
1413 | if (err_mask & AC_ERR_HSM) | |
1414 | return "HSM violation"; | |
1415 | if (err_mask & AC_ERR_SYSTEM) | |
1416 | return "internal error"; | |
1417 | if (err_mask & AC_ERR_MEDIA) | |
1418 | return "media error"; | |
1419 | if (err_mask & AC_ERR_INVALID) | |
1420 | return "invalid argument"; | |
1421 | if (err_mask & AC_ERR_DEV) | |
1422 | return "device error"; | |
54fb131b DLM |
1423 | if (err_mask & AC_ERR_NCQ) |
1424 | return "NCQ error"; | |
1425 | if (err_mask & AC_ERR_NODEV_HINT) | |
1426 | return "Polling detection error"; | |
022bdb07 TH |
1427 | return "unknown error"; |
1428 | } | |
1429 | ||
e8ee8451 TH |
1430 | /** |
1431 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1432 | * @dev: Device to read log page 10h from | |
1433 | * @tag: Resulting tag of the failed command | |
1434 | * @tf: Resulting taskfile registers of the failed command | |
1435 | * | |
1436 | * Read log page 10h to obtain NCQ error details and clear error | |
1437 | * condition. | |
1438 | * | |
1439 | * LOCKING: | |
1440 | * Kernel thread context (may sleep). | |
1441 | * | |
1442 | * RETURNS: | |
1443 | * 0 on success, -errno otherwise. | |
1444 | */ | |
1445 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1446 | int *tag, struct ata_taskfile *tf) | |
1447 | { | |
9af5c9c9 | 1448 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1449 | unsigned int err_mask; |
1450 | u8 csum; | |
1451 | int i; | |
1452 | ||
65fe1f0f | 1453 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, 0, buf, 1); |
e8ee8451 TH |
1454 | if (err_mask) |
1455 | return -EIO; | |
1456 | ||
1457 | csum = 0; | |
1458 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1459 | csum += buf[i]; | |
1460 | if (csum) | |
a9a79dfe JP |
1461 | ata_dev_warn(dev, "invalid checksum 0x%x on log page 10h\n", |
1462 | csum); | |
e8ee8451 TH |
1463 | |
1464 | if (buf[0] & 0x80) | |
1465 | return -ENOENT; | |
1466 | ||
1467 | *tag = buf[0] & 0x1f; | |
1468 | ||
1469 | tf->command = buf[2]; | |
1470 | tf->feature = buf[3]; | |
1471 | tf->lbal = buf[4]; | |
1472 | tf->lbam = buf[5]; | |
1473 | tf->lbah = buf[6]; | |
1474 | tf->device = buf[7]; | |
1475 | tf->hob_lbal = buf[8]; | |
1476 | tf->hob_lbam = buf[9]; | |
1477 | tf->hob_lbah = buf[10]; | |
1478 | tf->nsect = buf[12]; | |
1479 | tf->hob_nsect = buf[13]; | |
ca156e00 | 1480 | if (dev->class == ATA_DEV_ZAC && ata_id_has_ncq_autosense(dev->id)) |
5b01e4b9 | 1481 | tf->auxiliary = buf[14] << 16 | buf[15] << 8 | buf[16]; |
e8ee8451 TH |
1482 | |
1483 | return 0; | |
1484 | } | |
1485 | ||
11fc33da TH |
1486 | /** |
1487 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1488 | * @dev: target ATAPI device | |
1489 | * @r_sense_key: out parameter for sense_key | |
1490 | * | |
1491 | * Perform ATAPI TEST_UNIT_READY. | |
1492 | * | |
1493 | * LOCKING: | |
1494 | * EH context (may sleep). | |
1495 | * | |
1496 | * RETURNS: | |
1497 | * 0 on success, AC_ERR_* mask on failure. | |
1498 | */ | |
3dc67440 | 1499 | unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) |
11fc33da TH |
1500 | { |
1501 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1502 | struct ata_taskfile tf; | |
1503 | unsigned int err_mask; | |
1504 | ||
1505 | ata_tf_init(dev, &tf); | |
1506 | ||
1507 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1508 | tf.command = ATA_CMD_PACKET; | |
1509 | tf.protocol = ATAPI_PROT_NODATA; | |
1510 | ||
1511 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1512 | if (err_mask == AC_ERR_DEV) | |
1513 | *r_sense_key = tf.feature >> 4; | |
1514 | return err_mask; | |
1515 | } | |
1516 | ||
e87fd28c HR |
1517 | /** |
1518 | * ata_eh_request_sense - perform REQUEST_SENSE_DATA_EXT | |
2f60e1ab | 1519 | * @qc: qc to perform REQUEST_SENSE_SENSE_DATA_EXT to |
e87fd28c HR |
1520 | * @cmd: scsi command for which the sense code should be set |
1521 | * | |
1522 | * Perform REQUEST_SENSE_DATA_EXT after the device reported CHECK | |
1523 | * SENSE. This function is an EH helper. | |
1524 | * | |
1525 | * LOCKING: | |
1526 | * Kernel thread context (may sleep). | |
1527 | */ | |
1528 | static void ata_eh_request_sense(struct ata_queued_cmd *qc, | |
1529 | struct scsi_cmnd *cmd) | |
1530 | { | |
1531 | struct ata_device *dev = qc->dev; | |
1532 | struct ata_taskfile tf; | |
1533 | unsigned int err_mask; | |
1534 | ||
1535 | if (qc->ap->pflags & ATA_PFLAG_FROZEN) { | |
1536 | ata_dev_warn(dev, "sense data available but port frozen\n"); | |
1537 | return; | |
1538 | } | |
1539 | ||
d238ffd5 | 1540 | if (!cmd || qc->flags & ATA_QCFLAG_SENSE_VALID) |
e87fd28c HR |
1541 | return; |
1542 | ||
1543 | if (!ata_id_sense_reporting_enabled(dev->id)) { | |
1544 | ata_dev_warn(qc->dev, "sense data reporting disabled\n"); | |
1545 | return; | |
1546 | } | |
1547 | ||
1548 | DPRINTK("ATA request sense\n"); | |
1549 | ||
1550 | ata_tf_init(dev, &tf); | |
1551 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1552 | tf.flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
1553 | tf.command = ATA_CMD_REQ_SENSE_DATA; | |
1554 | tf.protocol = ATA_PROT_NODATA; | |
1555 | ||
1556 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
1557 | /* Ignore err_mask; ATA_ERR might be set */ | |
1558 | if (tf.command & ATA_SENSE) { | |
06dbde5f | 1559 | ata_scsi_set_sense(dev, cmd, tf.lbah, tf.lbam, tf.lbal); |
e87fd28c HR |
1560 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
1561 | } else { | |
1562 | ata_dev_warn(dev, "request sense failed stat %02x emask %x\n", | |
1563 | tf.command, err_mask); | |
1564 | } | |
1565 | } | |
1566 | ||
022bdb07 TH |
1567 | /** |
1568 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1569 | * @dev: device to perform REQUEST_SENSE to | |
1570 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1571 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1572 | * |
1573 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1574 | * SENSE. This function is EH helper. | |
1575 | * | |
1576 | * LOCKING: | |
1577 | * Kernel thread context (may sleep). | |
1578 | * | |
1579 | * RETURNS: | |
1580 | * 0 on success, AC_ERR_* mask on failure | |
1581 | */ | |
3dc67440 | 1582 | unsigned int atapi_eh_request_sense(struct ata_device *dev, |
3eabddb8 | 1583 | u8 *sense_buf, u8 dfl_sense_key) |
022bdb07 | 1584 | { |
3eabddb8 TH |
1585 | u8 cdb[ATAPI_CDB_LEN] = |
1586 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1587 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1588 | struct ata_taskfile tf; |
022bdb07 TH |
1589 | |
1590 | DPRINTK("ATAPI request sense\n"); | |
1591 | ||
022bdb07 TH |
1592 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
1593 | ||
56287768 AL |
1594 | /* initialize sense_buf with the error register, |
1595 | * for the case where they are -not- overwritten | |
1596 | */ | |
022bdb07 | 1597 | sense_buf[0] = 0x70; |
3eabddb8 | 1598 | sense_buf[2] = dfl_sense_key; |
56287768 | 1599 | |
a617c09f | 1600 | /* some devices time out if garbage left in tf */ |
56287768 | 1601 | ata_tf_init(dev, &tf); |
022bdb07 | 1602 | |
022bdb07 TH |
1603 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1604 | tf.command = ATA_CMD_PACKET; | |
1605 | ||
1606 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1607 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1608 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1609 | tf.feature |= ATAPI_PKT_DMA; |
1610 | } else { | |
0dc36888 | 1611 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1612 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1613 | tf.lbah = 0; | |
022bdb07 TH |
1614 | } |
1615 | ||
1616 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1617 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1618 | } |
1619 | ||
1620 | /** | |
1621 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1622 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1623 | * |
1624 | * Analyze SError if available and further determine cause of | |
1625 | * failure. | |
1626 | * | |
1627 | * LOCKING: | |
1628 | * None. | |
1629 | */ | |
0260731f | 1630 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1631 | { |
0260731f | 1632 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1633 | u32 serror = ehc->i.serror; |
1634 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1635 | u32 hotplug_mask; |
022bdb07 | 1636 | |
e0614db2 | 1637 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1638 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1639 | action |= ATA_EH_RESET; |
022bdb07 TH |
1640 | } |
1641 | if (serror & SERR_PROTOCOL) { | |
1642 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1643 | action |= ATA_EH_RESET; |
022bdb07 TH |
1644 | } |
1645 | if (serror & SERR_INTERNAL) { | |
1646 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1647 | action |= ATA_EH_RESET; |
022bdb07 | 1648 | } |
f9df58cb TH |
1649 | |
1650 | /* Determine whether a hotplug event has occurred. Both | |
1651 | * SError.N/X are considered hotplug events for enabled or | |
1652 | * host links. For disabled PMP links, only N bit is | |
1653 | * considered as X bit is left at 1 for link plugging. | |
1654 | */ | |
eb0e85e3 | 1655 | if (link->lpm_policy > ATA_LPM_MAX_POWER) |
6b7ae954 TH |
1656 | hotplug_mask = 0; /* hotplug doesn't work w/ LPM */ |
1657 | else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
f9df58cb TH |
1658 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
1659 | else | |
1660 | hotplug_mask = SERR_PHYRDY_CHG; | |
1661 | ||
1662 | if (serror & hotplug_mask) | |
084fe639 | 1663 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1664 | |
1665 | ehc->i.err_mask |= err_mask; | |
1666 | ehc->i.action |= action; | |
1667 | } | |
1668 | ||
e8ee8451 TH |
1669 | /** |
1670 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1671 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1672 | * |
1673 | * Read log page 10h, determine the offending qc and acquire | |
1674 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1675 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1676 | * care of the rest. | |
1677 | * | |
1678 | * LOCKING: | |
1679 | * Kernel thread context (may sleep). | |
1680 | */ | |
10acf3b0 | 1681 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1682 | { |
0260731f TH |
1683 | struct ata_port *ap = link->ap; |
1684 | struct ata_eh_context *ehc = &link->eh_context; | |
1685 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1686 | struct ata_queued_cmd *qc; |
1687 | struct ata_taskfile tf; | |
1688 | int tag, rc; | |
1689 | ||
1690 | /* if frozen, we can't do much */ | |
b51e9e5d | 1691 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1692 | return; |
1693 | ||
1694 | /* is it NCQ device error? */ | |
0260731f | 1695 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1696 | return; |
1697 | ||
1698 | /* has LLDD analyzed already? */ | |
258c4e5c | 1699 | ata_qc_for_each_raw(ap, qc, tag) { |
e8ee8451 TH |
1700 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
1701 | continue; | |
1702 | ||
1703 | if (qc->err_mask) | |
1704 | return; | |
1705 | } | |
1706 | ||
1707 | /* okay, this error is ours */ | |
a09bf4cd | 1708 | memset(&tf, 0, sizeof(tf)); |
e8ee8451 TH |
1709 | rc = ata_eh_read_log_10h(dev, &tag, &tf); |
1710 | if (rc) { | |
a9a79dfe JP |
1711 | ata_link_err(link, "failed to read log page 10h (errno=%d)\n", |
1712 | rc); | |
e8ee8451 TH |
1713 | return; |
1714 | } | |
1715 | ||
0260731f | 1716 | if (!(link->sactive & (1 << tag))) { |
a9a79dfe JP |
1717 | ata_link_err(link, "log page 10h reported inactive tag %d\n", |
1718 | tag); | |
e8ee8451 TH |
1719 | return; |
1720 | } | |
1721 | ||
1722 | /* we've got the perpetrator, condemn it */ | |
1723 | qc = __ata_qc_from_tag(ap, tag); | |
1724 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1725 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1726 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
ca156e00 TH |
1727 | if (dev->class == ATA_DEV_ZAC && |
1728 | ((qc->result_tf.command & ATA_SENSE) || qc->result_tf.auxiliary)) { | |
5b01e4b9 HR |
1729 | char sense_key, asc, ascq; |
1730 | ||
1731 | sense_key = (qc->result_tf.auxiliary >> 16) & 0xff; | |
1732 | asc = (qc->result_tf.auxiliary >> 8) & 0xff; | |
1733 | ascq = qc->result_tf.auxiliary & 0xff; | |
06dbde5f | 1734 | ata_scsi_set_sense(dev, qc->scsicmd, sense_key, asc, ascq); |
492bf621 HR |
1735 | ata_scsi_set_sense_information(dev, qc->scsicmd, |
1736 | &qc->result_tf); | |
5b01e4b9 HR |
1737 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
1738 | } | |
1739 | ||
e8ee8451 TH |
1740 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1741 | } | |
1742 | ||
022bdb07 TH |
1743 | /** |
1744 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1745 | * @qc: qc to analyze | |
1746 | * @tf: Taskfile registers to analyze | |
1747 | * | |
1748 | * Analyze taskfile of @qc and further determine cause of | |
1749 | * failure. This function also requests ATAPI sense data if | |
25985edc | 1750 | * available. |
022bdb07 TH |
1751 | * |
1752 | * LOCKING: | |
1753 | * Kernel thread context (may sleep). | |
1754 | * | |
1755 | * RETURNS: | |
1756 | * Determined recovery action | |
1757 | */ | |
1758 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1759 | const struct ata_taskfile *tf) | |
1760 | { | |
1761 | unsigned int tmp, action = 0; | |
1762 | u8 stat = tf->command, err = tf->feature; | |
1763 | ||
1764 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1765 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1766 | return ATA_EH_RESET; |
022bdb07 TH |
1767 | } |
1768 | ||
e87fd28c | 1769 | if (stat & (ATA_ERR | ATA_DF)) { |
a51d644a | 1770 | qc->err_mask |= AC_ERR_DEV; |
e87fd28c HR |
1771 | /* |
1772 | * Sense data reporting does not work if the | |
1773 | * device fault bit is set. | |
1774 | */ | |
1775 | if (stat & ATA_DF) | |
1776 | stat &= ~ATA_SENSE; | |
1777 | } else { | |
022bdb07 | 1778 | return 0; |
e87fd28c | 1779 | } |
022bdb07 TH |
1780 | |
1781 | switch (qc->dev->class) { | |
9162c657 | 1782 | case ATA_DEV_ZAC: |
e87fd28c HR |
1783 | if (stat & ATA_SENSE) |
1784 | ata_eh_request_sense(qc, qc->scsicmd); | |
ca156e00 TH |
1785 | /* fall through */ |
1786 | case ATA_DEV_ATA: | |
022bdb07 TH |
1787 | if (err & ATA_ICRC) |
1788 | qc->err_mask |= AC_ERR_ATA_BUS; | |
eec7e1c1 | 1789 | if (err & (ATA_UNC | ATA_AMNF)) |
022bdb07 TH |
1790 | qc->err_mask |= AC_ERR_MEDIA; |
1791 | if (err & ATA_IDNF) | |
1792 | qc->err_mask |= AC_ERR_INVALID; | |
1793 | break; | |
1794 | ||
1795 | case ATA_DEV_ATAPI: | |
a569a30d | 1796 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1797 | tmp = atapi_eh_request_sense(qc->dev, |
1798 | qc->scsicmd->sense_buffer, | |
1799 | qc->result_tf.feature >> 4); | |
3852e373 | 1800 | if (!tmp) |
a569a30d | 1801 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
3852e373 | 1802 | else |
a569a30d TH |
1803 | qc->err_mask |= tmp; |
1804 | } | |
022bdb07 TH |
1805 | } |
1806 | ||
3852e373 HR |
1807 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { |
1808 | int ret = scsi_check_sense(qc->scsicmd); | |
1809 | /* | |
79487259 | 1810 | * SUCCESS here means that the sense code could be |
3852e373 HR |
1811 | * evaluated and should be passed to the upper layers |
1812 | * for correct evaluation. | |
79487259 | 1813 | * FAILED means the sense code could not be interpreted |
3852e373 HR |
1814 | * and the device would need to be reset. |
1815 | * NEEDS_RETRY and ADD_TO_MLQUEUE means that the | |
1816 | * command would need to be retried. | |
1817 | */ | |
1818 | if (ret == NEEDS_RETRY || ret == ADD_TO_MLQUEUE) { | |
1819 | qc->flags |= ATA_QCFLAG_RETRY; | |
1820 | qc->err_mask |= AC_ERR_OTHER; | |
1821 | } else if (ret != SUCCESS) { | |
1822 | qc->err_mask |= AC_ERR_HSM; | |
1823 | } | |
1824 | } | |
022bdb07 | 1825 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) |
cf480626 | 1826 | action |= ATA_EH_RESET; |
022bdb07 TH |
1827 | |
1828 | return action; | |
1829 | } | |
1830 | ||
76326ac1 TH |
1831 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1832 | int *xfer_ok) | |
022bdb07 | 1833 | { |
76326ac1 TH |
1834 | int base = 0; |
1835 | ||
1836 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1837 | *xfer_ok = 1; | |
1838 | ||
1839 | if (!*xfer_ok) | |
75f9cafc | 1840 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1841 | |
7d47e8d4 | 1842 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1843 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1844 | |
7d47e8d4 | 1845 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1846 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1847 | |
3884f7b0 | 1848 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1849 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1850 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1851 | if ((err_mask & |
1852 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1853 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1854 | } |
1855 | ||
1856 | return 0; | |
1857 | } | |
1858 | ||
7d47e8d4 | 1859 | struct speed_down_verdict_arg { |
022bdb07 | 1860 | u64 since; |
76326ac1 | 1861 | int xfer_ok; |
3884f7b0 | 1862 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1863 | }; |
1864 | ||
7d47e8d4 | 1865 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1866 | { |
7d47e8d4 | 1867 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1868 | int cat; |
022bdb07 | 1869 | |
d9027470 | 1870 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since)) |
022bdb07 TH |
1871 | return -1; |
1872 | ||
76326ac1 TH |
1873 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1874 | &arg->xfer_ok); | |
7d47e8d4 | 1875 | arg->nr_errors[cat]++; |
76326ac1 | 1876 | |
022bdb07 TH |
1877 | return 0; |
1878 | } | |
1879 | ||
1880 | /** | |
7d47e8d4 | 1881 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1882 | * @dev: Device of interest |
1883 | * | |
1884 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1885 | * whether NCQ needs to be turned off, transfer speed should be |
1886 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1887 | * |
3884f7b0 TH |
1888 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1889 | * | |
1890 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1891 | * IO commands | |
1892 | * | |
1893 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1894 | * | |
76326ac1 TH |
1895 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1896 | * data transfer hasn't been verified. | |
1897 | * | |
3884f7b0 TH |
1898 | * Verdicts are |
1899 | * | |
1900 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1901 | * |
3884f7b0 TH |
1902 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1903 | * to PIO. | |
7d47e8d4 | 1904 | * |
3884f7b0 | 1905 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1906 | * |
3884f7b0 | 1907 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1908 | * taken per error. An action triggered by non-DUBIOUS errors |
1909 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1910 | * This is to expedite speed down decisions right after device is | |
1911 | * initially configured. | |
1912 | * | |
4091fb95 | 1913 | * The following are speed down rules. #1 and #2 deal with |
76326ac1 | 1914 | * DUBIOUS errors. |
7d47e8d4 | 1915 | * |
76326ac1 TH |
1916 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1917 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1918 | * | |
1919 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1920 | * occurred during last 5 mins, NCQ_OFF. | |
1921 | * | |
1922 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
25985edc | 1923 | * occurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1924 | * |
76326ac1 | 1925 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1926 | * during last 10 mins, NCQ_OFF. |
1927 | * | |
76326ac1 | 1928 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1929 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1930 | * |
022bdb07 TH |
1931 | * LOCKING: |
1932 | * Inherited from caller. | |
1933 | * | |
1934 | * RETURNS: | |
7d47e8d4 | 1935 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1936 | */ |
7d47e8d4 | 1937 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1938 | { |
7d47e8d4 TH |
1939 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1940 | u64 j64 = get_jiffies_64(); | |
1941 | struct speed_down_verdict_arg arg; | |
1942 | unsigned int verdict = 0; | |
022bdb07 | 1943 | |
3884f7b0 | 1944 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1945 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1946 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1947 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1948 | |
76326ac1 TH |
1949 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1950 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1951 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1952 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1953 | ||
1954 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1955 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1956 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1957 | ||
3884f7b0 TH |
1958 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1959 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1960 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1961 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1962 | |
3884f7b0 | 1963 | /* scan past 10 mins of error history */ |
022bdb07 | 1964 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1965 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1966 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1967 | |
3884f7b0 TH |
1968 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1969 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1970 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1971 | ||
1972 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1973 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1974 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1975 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1976 | |
7d47e8d4 | 1977 | return verdict; |
022bdb07 TH |
1978 | } |
1979 | ||
1980 | /** | |
1981 | * ata_eh_speed_down - record error and speed down if necessary | |
1982 | * @dev: Failed device | |
3884f7b0 | 1983 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1984 | * @err_mask: err_mask of the error |
1985 | * | |
1986 | * Record error and examine error history to determine whether | |
1987 | * adjusting transmission speed is necessary. It also sets | |
1988 | * transmission limits appropriately if such adjustment is | |
1989 | * necessary. | |
1990 | * | |
1991 | * LOCKING: | |
1992 | * Kernel thread context (may sleep). | |
1993 | * | |
1994 | * RETURNS: | |
7d47e8d4 | 1995 | * Determined recovery action. |
022bdb07 | 1996 | */ |
3884f7b0 TH |
1997 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1998 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1999 | { |
b1c72916 | 2000 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 2001 | int xfer_ok = 0; |
7d47e8d4 TH |
2002 | unsigned int verdict; |
2003 | unsigned int action = 0; | |
2004 | ||
2005 | /* don't bother if Cat-0 error */ | |
76326ac1 | 2006 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
2007 | return 0; |
2008 | ||
2009 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 2010 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 2011 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 2012 | |
7d47e8d4 TH |
2013 | /* turn off NCQ? */ |
2014 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
2015 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
2016 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
2017 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
a9a79dfe | 2018 | ata_dev_warn(dev, "NCQ disabled due to excessive errors\n"); |
7d47e8d4 TH |
2019 | goto done; |
2020 | } | |
022bdb07 | 2021 | |
7d47e8d4 TH |
2022 | /* speed down? */ |
2023 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
2024 | /* speed down SATA link speed if possible */ | |
a07d499b | 2025 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 2026 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2027 | goto done; |
2028 | } | |
022bdb07 | 2029 | |
7d47e8d4 TH |
2030 | /* lower transfer mode */ |
2031 | if (dev->spdn_cnt < 2) { | |
2032 | static const int dma_dnxfer_sel[] = | |
2033 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
2034 | static const int pio_dnxfer_sel[] = | |
2035 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
2036 | int sel; | |
2037 | ||
2038 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
2039 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
2040 | else | |
2041 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
2042 | ||
2043 | dev->spdn_cnt++; | |
2044 | ||
2045 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 2046 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2047 | goto done; |
2048 | } | |
2049 | } | |
2050 | } | |
2051 | ||
2052 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 2053 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
2054 | */ |
2055 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 2056 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
2057 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
2058 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
2059 | dev->spdn_cnt = 0; | |
cf480626 | 2060 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2061 | goto done; |
2062 | } | |
2063 | } | |
022bdb07 | 2064 | |
022bdb07 | 2065 | return 0; |
7d47e8d4 TH |
2066 | done: |
2067 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
2068 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
2069 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 2070 | return action; |
022bdb07 TH |
2071 | } |
2072 | ||
8d899e70 ML |
2073 | /** |
2074 | * ata_eh_worth_retry - analyze error and decide whether to retry | |
2075 | * @qc: qc to possibly retry | |
2076 | * | |
2077 | * Look at the cause of the error and decide if a retry | |
2078 | * might be useful or not. We don't want to retry media errors | |
2079 | * because the drive itself has probably already taken 10-30 seconds | |
2080 | * doing its own internal retries before reporting the failure. | |
2081 | */ | |
2082 | static inline int ata_eh_worth_retry(struct ata_queued_cmd *qc) | |
2083 | { | |
1eaca39a | 2084 | if (qc->err_mask & AC_ERR_MEDIA) |
8d899e70 ML |
2085 | return 0; /* don't retry media errors */ |
2086 | if (qc->flags & ATA_QCFLAG_IO) | |
2087 | return 1; /* otherwise retry anything from fs stack */ | |
2088 | if (qc->err_mask & AC_ERR_INVALID) | |
2089 | return 0; /* don't retry these */ | |
2090 | return qc->err_mask != AC_ERR_DEV; /* retry if not dev error */ | |
2091 | } | |
2092 | ||
7eb49509 DLM |
2093 | /** |
2094 | * ata_eh_quiet - check if we need to be quiet about a command error | |
2095 | * @qc: qc to check | |
2096 | * | |
2097 | * Look at the qc flags anbd its scsi command request flags to determine | |
2098 | * if we need to be quiet about the command failure. | |
2099 | */ | |
2100 | static inline bool ata_eh_quiet(struct ata_queued_cmd *qc) | |
2101 | { | |
2102 | if (qc->scsicmd && | |
2103 | qc->scsicmd->request->rq_flags & RQF_QUIET) | |
2104 | qc->flags |= ATA_QCFLAG_QUIET; | |
2105 | return qc->flags & ATA_QCFLAG_QUIET; | |
2106 | } | |
2107 | ||
022bdb07 | 2108 | /** |
9b1e2658 TH |
2109 | * ata_eh_link_autopsy - analyze error and determine recovery action |
2110 | * @link: host link to perform autopsy on | |
022bdb07 | 2111 | * |
0260731f TH |
2112 | * Analyze why @link failed and determine which recovery actions |
2113 | * are needed. This function also sets more detailed AC_ERR_* | |
2114 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
2115 | * |
2116 | * LOCKING: | |
2117 | * Kernel thread context (may sleep). | |
2118 | */ | |
9b1e2658 | 2119 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 2120 | { |
0260731f | 2121 | struct ata_port *ap = link->ap; |
936fd732 | 2122 | struct ata_eh_context *ehc = &link->eh_context; |
258c4e5c | 2123 | struct ata_queued_cmd *qc; |
dfcc173d | 2124 | struct ata_device *dev; |
3884f7b0 | 2125 | unsigned int all_err_mask = 0, eflags = 0; |
7eb49509 | 2126 | int tag, nr_failed = 0, nr_quiet = 0; |
022bdb07 TH |
2127 | u32 serror; |
2128 | int rc; | |
2129 | ||
2130 | DPRINTK("ENTER\n"); | |
2131 | ||
1cdaf534 TH |
2132 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
2133 | return; | |
2134 | ||
022bdb07 | 2135 | /* obtain and analyze SError */ |
936fd732 | 2136 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
2137 | if (rc == 0) { |
2138 | ehc->i.serror |= serror; | |
0260731f | 2139 | ata_eh_analyze_serror(link); |
4e57c517 | 2140 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 2141 | /* SError read failed, force reset and probing */ |
b558eddd | 2142 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 2143 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
2144 | ehc->i.err_mask |= AC_ERR_OTHER; |
2145 | } | |
022bdb07 | 2146 | |
e8ee8451 | 2147 | /* analyze NCQ failure */ |
0260731f | 2148 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 2149 | |
022bdb07 TH |
2150 | /* any real error trumps AC_ERR_OTHER */ |
2151 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
2152 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
2153 | ||
2154 | all_err_mask |= ehc->i.err_mask; | |
2155 | ||
258c4e5c | 2156 | ata_qc_for_each_raw(ap, qc, tag) { |
b1c72916 TH |
2157 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2158 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
2159 | continue; |
2160 | ||
2161 | /* inherit upper level err_mask */ | |
2162 | qc->err_mask |= ehc->i.err_mask; | |
2163 | ||
022bdb07 | 2164 | /* analyze TF */ |
4528e4da | 2165 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
2166 | |
2167 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
2168 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
2169 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
2170 | AC_ERR_INVALID); | |
2171 | ||
2172 | /* any real error trumps unknown error */ | |
2173 | if (qc->err_mask & ~AC_ERR_OTHER) | |
2174 | qc->err_mask &= ~AC_ERR_OTHER; | |
2175 | ||
804689ad DLM |
2176 | /* |
2177 | * SENSE_VALID trumps dev/unknown error and revalidation. Upper | |
2178 | * layers will determine whether the command is worth retrying | |
2179 | * based on the sense data and device class/type. Otherwise, | |
2180 | * determine directly if the command is worth retrying using its | |
2181 | * error mask and flags. | |
2182 | */ | |
f90f0828 | 2183 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 2184 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
804689ad | 2185 | else if (ata_eh_worth_retry(qc)) |
03faab78 TH |
2186 | qc->flags |= ATA_QCFLAG_RETRY; |
2187 | ||
022bdb07 | 2188 | /* accumulate error info */ |
4528e4da | 2189 | ehc->i.dev = qc->dev; |
022bdb07 TH |
2190 | all_err_mask |= qc->err_mask; |
2191 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 2192 | eflags |= ATA_EFLAG_IS_IO; |
255c03d1 | 2193 | trace_ata_eh_link_autopsy_qc(qc); |
7eb49509 DLM |
2194 | |
2195 | /* Count quiet errors */ | |
2196 | if (ata_eh_quiet(qc)) | |
2197 | nr_quiet++; | |
2198 | nr_failed++; | |
022bdb07 TH |
2199 | } |
2200 | ||
7eb49509 DLM |
2201 | /* If all failed commands requested silence, then be quiet */ |
2202 | if (nr_quiet == nr_failed) | |
2203 | ehc->i.flags |= ATA_EHI_QUIET; | |
2204 | ||
a20f33ff | 2205 | /* enforce default EH actions */ |
b51e9e5d | 2206 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 2207 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2208 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2209 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2210 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2211 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2212 | |
dfcc173d TH |
2213 | /* If we have offending qcs and the associated failed device, |
2214 | * perform per-dev EH action only on the offending device. | |
2215 | */ | |
4528e4da | 2216 | if (ehc->i.dev) { |
4528e4da TH |
2217 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2218 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2219 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2220 | } |
2221 | ||
2695e366 TH |
2222 | /* propagate timeout to host link */ |
2223 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2224 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2225 | ||
2226 | /* record error and consider speeding down */ | |
dfcc173d | 2227 | dev = ehc->i.dev; |
2695e366 TH |
2228 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2229 | ata_dev_enabled(link->device)))) | |
2230 | dev = link->device; | |
dfcc173d | 2231 | |
76326ac1 TH |
2232 | if (dev) { |
2233 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2234 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2235 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
f1601113 | 2236 | trace_ata_eh_link_autopsy(dev, ehc->i.action, all_err_mask); |
76326ac1 | 2237 | } |
022bdb07 TH |
2238 | DPRINTK("EXIT\n"); |
2239 | } | |
2240 | ||
2241 | /** | |
9b1e2658 TH |
2242 | * ata_eh_autopsy - analyze error and determine recovery action |
2243 | * @ap: host port to perform autopsy on | |
2244 | * | |
2245 | * Analyze all links of @ap and determine why they failed and | |
2246 | * which recovery actions are needed. | |
2247 | * | |
2248 | * LOCKING: | |
2249 | * Kernel thread context (may sleep). | |
2250 | */ | |
fb7fd614 | 2251 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2252 | { |
2253 | struct ata_link *link; | |
2254 | ||
1eca4365 | 2255 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2256 | ata_eh_link_autopsy(link); |
2695e366 | 2257 | |
b1c72916 TH |
2258 | /* Handle the frigging slave link. Autopsy is done similarly |
2259 | * but actions and flags are transferred over to the master | |
2260 | * link and handled from there. | |
2261 | */ | |
2262 | if (ap->slave_link) { | |
2263 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2264 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2265 | ||
848e4c68 TH |
2266 | /* transfer control flags from master to slave */ |
2267 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2268 | ||
2269 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2270 | ata_eh_link_autopsy(ap->slave_link); |
2271 | ||
848e4c68 | 2272 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2273 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2274 | mehc->i.action |= sehc->i.action; | |
2275 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2276 | mehc->i.flags |= sehc->i.flags; | |
2277 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2278 | } | |
2279 | ||
2695e366 TH |
2280 | /* Autopsy of fanout ports can affect host link autopsy. |
2281 | * Perform host link autopsy last. | |
2282 | */ | |
071f44b1 | 2283 | if (sata_pmp_attached(ap)) |
2695e366 | 2284 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2285 | } |
2286 | ||
6521148c RH |
2287 | /** |
2288 | * ata_get_cmd_descript - get description for ATA command | |
2289 | * @command: ATA command code to get description for | |
2290 | * | |
2291 | * Return a textual description of the given command, or NULL if the | |
2292 | * command is not known. | |
2293 | * | |
2294 | * LOCKING: | |
2295 | * None | |
2296 | */ | |
2297 | const char *ata_get_cmd_descript(u8 command) | |
2298 | { | |
2299 | #ifdef CONFIG_ATA_VERBOSE_ERROR | |
2300 | static const struct | |
2301 | { | |
2302 | u8 command; | |
2303 | const char *text; | |
2304 | } cmd_descr[] = { | |
2305 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, | |
825e2d87 HR |
2306 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, |
2307 | { ATA_CMD_STANDBY, "STANDBY" }, | |
2308 | { ATA_CMD_IDLE, "IDLE" }, | |
2309 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, | |
2310 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, | |
3915c3b5 | 2311 | { ATA_CMD_DOWNLOAD_MICRO_DMA, "DOWNLOAD MICROCODE DMA" }, |
6521148c | 2312 | { ATA_CMD_NOP, "NOP" }, |
825e2d87 HR |
2313 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, |
2314 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, | |
2315 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, | |
2316 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, | |
2317 | { ATA_CMD_SERVICE, "SERVICE" }, | |
2318 | { ATA_CMD_READ, "READ DMA" }, | |
2319 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, | |
2320 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, | |
2321 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, | |
6521148c | 2322 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, |
825e2d87 HR |
2323 | { ATA_CMD_WRITE, "WRITE DMA" }, |
2324 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, | |
2325 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, | |
2326 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, | |
6521148c RH |
2327 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, |
2328 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, | |
2329 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, | |
2330 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, | |
2331 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, | |
3915c3b5 RH |
2332 | { ATA_CMD_FPDMA_SEND, "SEND FPDMA QUEUED" }, |
2333 | { ATA_CMD_FPDMA_RECV, "RECEIVE FPDMA QUEUED" }, | |
6521148c RH |
2334 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, |
2335 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, | |
2336 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, | |
2337 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, | |
2338 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, | |
2339 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, | |
2340 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, | |
2341 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, | |
825e2d87 | 2342 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, |
6521148c RH |
2343 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, |
2344 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, | |
2345 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, | |
2346 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, | |
2347 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, | |
2348 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, | |
2349 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, | |
2350 | { ATA_CMD_SLEEP, "SLEEP" }, | |
2351 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, | |
2352 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, | |
2353 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, | |
2354 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, | |
2355 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, | |
2356 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, | |
2357 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, | |
2358 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, | |
825e2d87 | 2359 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, |
3915c3b5 | 2360 | { ATA_CMD_TRUSTED_NONDATA, "TRUSTED NON-DATA" }, |
6521148c | 2361 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, |
825e2d87 | 2362 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, |
6521148c | 2363 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, |
825e2d87 | 2364 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, |
6521148c | 2365 | { ATA_CMD_PMP_READ, "READ BUFFER" }, |
3915c3b5 | 2366 | { ATA_CMD_PMP_READ_DMA, "READ BUFFER DMA" }, |
6521148c | 2367 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, |
3915c3b5 | 2368 | { ATA_CMD_PMP_WRITE_DMA, "WRITE BUFFER DMA" }, |
6521148c RH |
2369 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, |
2370 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, | |
2371 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, | |
2372 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, | |
2373 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, | |
2374 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, | |
2375 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, | |
2376 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, | |
2377 | { ATA_CMD_SMART, "SMART" }, | |
2378 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, | |
2379 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, | |
acad7627 | 2380 | { ATA_CMD_DSM, "DATA SET MANAGEMENT" }, |
825e2d87 HR |
2381 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, |
2382 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, | |
6521148c RH |
2383 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, |
2384 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, | |
2385 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, | |
825e2d87 | 2386 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, |
3915c3b5 RH |
2387 | { ATA_CMD_REQ_SENSE_DATA, "REQUEST SENSE DATA EXT" }, |
2388 | { ATA_CMD_SANITIZE_DEVICE, "SANITIZE DEVICE" }, | |
28a3fc22 | 2389 | { ATA_CMD_ZAC_MGMT_IN, "ZAC MANAGEMENT IN" }, |
27708a95 | 2390 | { ATA_CMD_ZAC_MGMT_OUT, "ZAC MANAGEMENT OUT" }, |
6521148c RH |
2391 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, |
2392 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, | |
2393 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, | |
2394 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, | |
2395 | { ATA_CMD_RESTORE, "RECALIBRATE" }, | |
2396 | { 0, NULL } /* terminate list */ | |
2397 | }; | |
2398 | ||
2399 | unsigned int i; | |
2400 | for (i = 0; cmd_descr[i].text; i++) | |
2401 | if (cmd_descr[i].command == command) | |
2402 | return cmd_descr[i].text; | |
2403 | #endif | |
2404 | ||
2405 | return NULL; | |
2406 | } | |
36aae28e | 2407 | EXPORT_SYMBOL_GPL(ata_get_cmd_descript); |
6521148c | 2408 | |
9b1e2658 TH |
2409 | /** |
2410 | * ata_eh_link_report - report error handling to user | |
0260731f | 2411 | * @link: ATA link EH is going on |
022bdb07 TH |
2412 | * |
2413 | * Report EH to user. | |
2414 | * | |
2415 | * LOCKING: | |
2416 | * None. | |
2417 | */ | |
9b1e2658 | 2418 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2419 | { |
0260731f TH |
2420 | struct ata_port *ap = link->ap; |
2421 | struct ata_eh_context *ehc = &link->eh_context; | |
258c4e5c | 2422 | struct ata_queued_cmd *qc; |
022bdb07 | 2423 | const char *frozen, *desc; |
462098b0 | 2424 | char tries_buf[6] = ""; |
022bdb07 TH |
2425 | int tag, nr_failed = 0; |
2426 | ||
94ff3d54 TH |
2427 | if (ehc->i.flags & ATA_EHI_QUIET) |
2428 | return; | |
2429 | ||
022bdb07 TH |
2430 | desc = NULL; |
2431 | if (ehc->i.desc[0] != '\0') | |
2432 | desc = ehc->i.desc; | |
2433 | ||
258c4e5c | 2434 | ata_qc_for_each_raw(ap, qc, tag) { |
b1c72916 TH |
2435 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2436 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2437 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2438 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2439 | continue; |
2440 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2441 | continue; | |
2442 | ||
2443 | nr_failed++; | |
2444 | } | |
2445 | ||
2446 | if (!nr_failed && !ehc->i.err_mask) | |
2447 | return; | |
2448 | ||
2449 | frozen = ""; | |
b51e9e5d | 2450 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2451 | frozen = " frozen"; |
2452 | ||
a1e10f7e | 2453 | if (ap->eh_tries < ATA_EH_MAX_TRIES) |
462098b0 | 2454 | snprintf(tries_buf, sizeof(tries_buf), " t%d", |
a1e10f7e TH |
2455 | ap->eh_tries); |
2456 | ||
022bdb07 | 2457 | if (ehc->i.dev) { |
a9a79dfe JP |
2458 | ata_dev_err(ehc->i.dev, "exception Emask 0x%x " |
2459 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2460 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2461 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2462 | if (desc) |
a9a79dfe | 2463 | ata_dev_err(ehc->i.dev, "%s\n", desc); |
022bdb07 | 2464 | } else { |
a9a79dfe JP |
2465 | ata_link_err(link, "exception Emask 0x%x " |
2466 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2467 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2468 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2469 | if (desc) |
a9a79dfe | 2470 | ata_link_err(link, "%s\n", desc); |
022bdb07 TH |
2471 | } |
2472 | ||
6521148c | 2473 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2474 | if (ehc->i.serror) |
a9a79dfe | 2475 | ata_link_err(link, |
1333e194 RH |
2476 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2477 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2478 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2479 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2480 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2481 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2482 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2483 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2484 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2485 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2486 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2487 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2488 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2489 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2490 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2491 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2492 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2493 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
6521148c | 2494 | #endif |
1333e194 | 2495 | |
258c4e5c | 2496 | ata_qc_for_each_raw(ap, qc, tag) { |
8a937581 | 2497 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2498 | char data_buf[20] = ""; |
2499 | char cdb_buf[70] = ""; | |
022bdb07 | 2500 | |
0260731f | 2501 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2502 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2503 | continue; |
2504 | ||
abb6a889 TH |
2505 | if (qc->dma_dir != DMA_NONE) { |
2506 | static const char *dma_str[] = { | |
2507 | [DMA_BIDIRECTIONAL] = "bidi", | |
2508 | [DMA_TO_DEVICE] = "out", | |
2509 | [DMA_FROM_DEVICE] = "in", | |
2510 | }; | |
fb1b8b11 GU |
2511 | const char *prot_str = NULL; |
2512 | ||
2513 | switch (qc->tf.protocol) { | |
2514 | case ATA_PROT_UNKNOWN: | |
2515 | prot_str = "unknown"; | |
2516 | break; | |
2517 | case ATA_PROT_NODATA: | |
2518 | prot_str = "nodata"; | |
2519 | break; | |
2520 | case ATA_PROT_PIO: | |
2521 | prot_str = "pio"; | |
2522 | break; | |
2523 | case ATA_PROT_DMA: | |
2524 | prot_str = "dma"; | |
2525 | break; | |
2526 | case ATA_PROT_NCQ: | |
2527 | prot_str = "ncq dma"; | |
2528 | break; | |
2529 | case ATA_PROT_NCQ_NODATA: | |
2530 | prot_str = "ncq nodata"; | |
2531 | break; | |
2532 | case ATAPI_PROT_NODATA: | |
2533 | prot_str = "nodata"; | |
2534 | break; | |
2535 | case ATAPI_PROT_PIO: | |
2536 | prot_str = "pio"; | |
2537 | break; | |
2538 | case ATAPI_PROT_DMA: | |
2539 | prot_str = "dma"; | |
2540 | break; | |
2541 | } | |
abb6a889 | 2542 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", |
fb1b8b11 | 2543 | prot_str, qc->nbytes, dma_str[qc->dma_dir]); |
abb6a889 TH |
2544 | } |
2545 | ||
6521148c | 2546 | if (ata_is_atapi(qc->tf.protocol)) { |
a13b0c9d HR |
2547 | const u8 *cdb = qc->cdb; |
2548 | size_t cdb_len = qc->dev->cdb_len; | |
2549 | ||
cbba5b0e HR |
2550 | if (qc->scsicmd) { |
2551 | cdb = qc->scsicmd->cmnd; | |
2552 | cdb_len = qc->scsicmd->cmd_len; | |
2553 | } | |
2554 | __scsi_format_command(cdb_buf, sizeof(cdb_buf), | |
2555 | cdb, cdb_len); | |
6521148c RH |
2556 | } else { |
2557 | const char *descr = ata_get_cmd_descript(cmd->command); | |
2558 | if (descr) | |
a9a79dfe JP |
2559 | ata_dev_err(qc->dev, "failed command: %s\n", |
2560 | descr); | |
6521148c | 2561 | } |
abb6a889 | 2562 | |
a9a79dfe | 2563 | ata_dev_err(qc->dev, |
8a937581 | 2564 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
abb6a889 | 2565 | "tag %d%s\n %s" |
8a937581 | 2566 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2567 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2568 | cmd->command, cmd->feature, cmd->nsect, |
2569 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2570 | cmd->hob_feature, cmd->hob_nsect, | |
2571 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2572 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2573 | res->command, res->feature, res->nsect, |
2574 | res->lbal, res->lbam, res->lbah, | |
2575 | res->hob_feature, res->hob_nsect, | |
2576 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2577 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2578 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 | 2579 | |
6521148c | 2580 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2581 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
e87fd28c | 2582 | ATA_SENSE | ATA_ERR)) { |
1333e194 | 2583 | if (res->command & ATA_BUSY) |
a9a79dfe | 2584 | ata_dev_err(qc->dev, "status: { Busy }\n"); |
1333e194 | 2585 | else |
e87fd28c | 2586 | ata_dev_err(qc->dev, "status: { %s%s%s%s%s}\n", |
1333e194 RH |
2587 | res->command & ATA_DRDY ? "DRDY " : "", |
2588 | res->command & ATA_DF ? "DF " : "", | |
2589 | res->command & ATA_DRQ ? "DRQ " : "", | |
e87fd28c | 2590 | res->command & ATA_SENSE ? "SENSE " : "", |
2dcb407e | 2591 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2592 | } |
2593 | ||
2594 | if (cmd->command != ATA_CMD_PACKET && | |
eec7e1c1 AA |
2595 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_AMNF | |
2596 | ATA_IDNF | ATA_ABORTED))) | |
2597 | ata_dev_err(qc->dev, "error: { %s%s%s%s%s}\n", | |
1333e194 RH |
2598 | res->feature & ATA_ICRC ? "ICRC " : "", |
2599 | res->feature & ATA_UNC ? "UNC " : "", | |
eec7e1c1 | 2600 | res->feature & ATA_AMNF ? "AMNF " : "", |
1333e194 | 2601 | res->feature & ATA_IDNF ? "IDNF " : "", |
2dcb407e | 2602 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
6521148c | 2603 | #endif |
022bdb07 TH |
2604 | } |
2605 | } | |
2606 | ||
9b1e2658 TH |
2607 | /** |
2608 | * ata_eh_report - report error handling to user | |
2609 | * @ap: ATA port to report EH about | |
2610 | * | |
2611 | * Report EH to user. | |
2612 | * | |
2613 | * LOCKING: | |
2614 | * None. | |
2615 | */ | |
fb7fd614 | 2616 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2617 | { |
2618 | struct ata_link *link; | |
2619 | ||
1eca4365 | 2620 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2621 | ata_eh_link_report(link); |
2622 | } | |
2623 | ||
cc0680a5 | 2624 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2625 | unsigned int *classes, unsigned long deadline, |
2626 | bool clear_classes) | |
d87fa38e | 2627 | { |
f58229f8 | 2628 | struct ata_device *dev; |
d87fa38e | 2629 | |
b1c72916 | 2630 | if (clear_classes) |
1eca4365 | 2631 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2632 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2633 | |
f046519f | 2634 | return reset(link, classes, deadline); |
d87fa38e TH |
2635 | } |
2636 | ||
e8411fba | 2637 | static int ata_eh_followup_srst_needed(struct ata_link *link, int rc) |
664faf09 | 2638 | { |
45db2f6c | 2639 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2640 | return 0; |
5dbfc9cb TH |
2641 | if (rc == -EAGAIN) |
2642 | return 1; | |
071f44b1 | 2643 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2644 | return 1; |
664faf09 TH |
2645 | return 0; |
2646 | } | |
2647 | ||
fb7fd614 TH |
2648 | int ata_eh_reset(struct ata_link *link, int classify, |
2649 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2650 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2651 | { |
afaa5c37 | 2652 | struct ata_port *ap = link->ap; |
b1c72916 | 2653 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2654 | struct ata_eh_context *ehc = &link->eh_context; |
705d2014 | 2655 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
664faf09 | 2656 | unsigned int *classes = ehc->classes; |
416dc9ed | 2657 | unsigned int lflags = link->flags; |
1cdaf534 | 2658 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2659 | int max_tries = 0, try = 0; |
b1c72916 | 2660 | struct ata_link *failed_link; |
f58229f8 | 2661 | struct ata_device *dev; |
416dc9ed | 2662 | unsigned long deadline, now; |
022bdb07 | 2663 | ata_reset_fn_t reset; |
afaa5c37 | 2664 | unsigned long flags; |
416dc9ed | 2665 | u32 sstatus; |
b1c72916 | 2666 | int nr_unknown, rc; |
022bdb07 | 2667 | |
932648b0 TH |
2668 | /* |
2669 | * Prepare to reset | |
2670 | */ | |
d8af0eb6 TH |
2671 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2672 | max_tries++; | |
ca6d43b0 DW |
2673 | if (link->flags & ATA_LFLAG_RST_ONCE) |
2674 | max_tries = 1; | |
05944bdf TH |
2675 | if (link->flags & ATA_LFLAG_NO_HRST) |
2676 | hardreset = NULL; | |
2677 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2678 | softreset = NULL; | |
d8af0eb6 | 2679 | |
25985edc | 2680 | /* make sure each reset attempt is at least COOL_DOWN apart */ |
19b72321 TH |
2681 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
2682 | now = jiffies; | |
2683 | WARN_ON(time_after(ehc->last_reset, now)); | |
2684 | deadline = ata_deadline(ehc->last_reset, | |
2685 | ATA_EH_RESET_COOL_DOWN); | |
2686 | if (time_before(now, deadline)) | |
2687 | schedule_timeout_uninterruptible(deadline - now); | |
2688 | } | |
0a2c0f56 | 2689 | |
afaa5c37 TH |
2690 | spin_lock_irqsave(ap->lock, flags); |
2691 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2692 | spin_unlock_irqrestore(ap->lock, flags); | |
2693 | ||
cf480626 | 2694 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2695 | |
1eca4365 | 2696 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2697 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2698 | * may change configuration and be in PIO0 timing. If | |
2699 | * we do a hard reset (or are coming from power on) | |
2700 | * this is true for ATA or ATAPI. Until we've set a | |
2701 | * suitable controller mode we should not touch the | |
2702 | * bus as we may be talking too fast. | |
2703 | */ | |
2704 | dev->pio_mode = XFER_PIO_0; | |
5416912a | 2705 | dev->dma_mode = 0xff; |
cdeab114 TH |
2706 | |
2707 | /* If the controller has a pio mode setup function | |
2708 | * then use it to set the chipset to rights. Don't | |
2709 | * touch the DMA setup as that will be dealt with when | |
2710 | * configuring devices. | |
2711 | */ | |
2712 | if (ap->ops->set_piomode) | |
2713 | ap->ops->set_piomode(ap, dev); | |
2714 | } | |
2715 | ||
cf480626 | 2716 | /* prefer hardreset */ |
932648b0 | 2717 | reset = NULL; |
cf480626 TH |
2718 | ehc->i.action &= ~ATA_EH_RESET; |
2719 | if (hardreset) { | |
2720 | reset = hardreset; | |
a674050e | 2721 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2722 | } else if (softreset) { |
cf480626 | 2723 | reset = softreset; |
a674050e | 2724 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2725 | } |
f5914a46 TH |
2726 | |
2727 | if (prereset) { | |
b1c72916 TH |
2728 | unsigned long deadline = ata_deadline(jiffies, |
2729 | ATA_EH_PRERESET_TIMEOUT); | |
2730 | ||
2731 | if (slave) { | |
2732 | sehc->i.action &= ~ATA_EH_RESET; | |
2733 | sehc->i.action |= ehc->i.action; | |
2734 | } | |
2735 | ||
2736 | rc = prereset(link, deadline); | |
2737 | ||
2738 | /* If present, do prereset on slave link too. Reset | |
2739 | * is skipped iff both master and slave links report | |
2740 | * -ENOENT or clear ATA_EH_RESET. | |
2741 | */ | |
2742 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2743 | int tmp; | |
2744 | ||
2745 | tmp = prereset(slave, deadline); | |
2746 | if (tmp != -ENOENT) | |
2747 | rc = tmp; | |
2748 | ||
2749 | ehc->i.action |= sehc->i.action; | |
2750 | } | |
2751 | ||
f5914a46 | 2752 | if (rc) { |
c961922b | 2753 | if (rc == -ENOENT) { |
a9a79dfe | 2754 | ata_link_dbg(link, "port disabled--ignoring\n"); |
cf480626 | 2755 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2756 | |
1eca4365 | 2757 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2758 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2759 | |
2760 | rc = 0; | |
c961922b | 2761 | } else |
a9a79dfe JP |
2762 | ata_link_err(link, |
2763 | "prereset failed (errno=%d)\n", | |
2764 | rc); | |
fccb6ea5 | 2765 | goto out; |
f5914a46 | 2766 | } |
f5914a46 | 2767 | |
932648b0 | 2768 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2769 | * bang classes, thaw and return. |
932648b0 TH |
2770 | */ |
2771 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2772 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2773 | classes[dev->devno] = ATA_DEV_NONE; |
d6515e6f TH |
2774 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
2775 | ata_is_host_link(link)) | |
2776 | ata_eh_thaw_port(ap); | |
932648b0 TH |
2777 | rc = 0; |
2778 | goto out; | |
2779 | } | |
f5914a46 TH |
2780 | } |
2781 | ||
022bdb07 | 2782 | retry: |
932648b0 TH |
2783 | /* |
2784 | * Perform reset | |
2785 | */ | |
dc98c32c TH |
2786 | if (ata_is_host_link(link)) |
2787 | ata_eh_freeze_port(ap); | |
2788 | ||
341c2c95 | 2789 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2790 | |
932648b0 TH |
2791 | if (reset) { |
2792 | if (verbose) | |
a9a79dfe JP |
2793 | ata_link_info(link, "%s resetting link\n", |
2794 | reset == softreset ? "soft" : "hard"); | |
932648b0 TH |
2795 | |
2796 | /* mark that this EH session started with reset */ | |
19b72321 | 2797 | ehc->last_reset = jiffies; |
932648b0 TH |
2798 | if (reset == hardreset) |
2799 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2800 | else | |
2801 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2802 | |
b1c72916 TH |
2803 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2804 | if (rc && rc != -EAGAIN) { | |
2805 | failed_link = link; | |
5dbfc9cb | 2806 | goto fail; |
b1c72916 TH |
2807 | } |
2808 | ||
2809 | /* hardreset slave link if existent */ | |
2810 | if (slave && reset == hardreset) { | |
2811 | int tmp; | |
2812 | ||
2813 | if (verbose) | |
a9a79dfe | 2814 | ata_link_info(slave, "hard resetting link\n"); |
b1c72916 TH |
2815 | |
2816 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2817 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2818 | false); | |
2819 | switch (tmp) { | |
2820 | case -EAGAIN: | |
2821 | rc = -EAGAIN; | |
2822 | case 0: | |
2823 | break; | |
2824 | default: | |
2825 | failed_link = slave; | |
2826 | rc = tmp; | |
2827 | goto fail; | |
2828 | } | |
2829 | } | |
022bdb07 | 2830 | |
b1c72916 | 2831 | /* perform follow-up SRST if necessary */ |
932648b0 | 2832 | if (reset == hardreset && |
e8411fba | 2833 | ata_eh_followup_srst_needed(link, rc)) { |
932648b0 | 2834 | reset = softreset; |
022bdb07 | 2835 | |
932648b0 | 2836 | if (!reset) { |
a9a79dfe JP |
2837 | ata_link_err(link, |
2838 | "follow-up softreset required but no softreset available\n"); | |
b1c72916 | 2839 | failed_link = link; |
932648b0 TH |
2840 | rc = -EINVAL; |
2841 | goto fail; | |
2842 | } | |
664faf09 | 2843 | |
932648b0 | 2844 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2845 | rc = ata_do_reset(link, reset, classes, deadline, true); |
fe2c4d01 TH |
2846 | if (rc) { |
2847 | failed_link = link; | |
2848 | goto fail; | |
2849 | } | |
664faf09 | 2850 | } |
932648b0 TH |
2851 | } else { |
2852 | if (verbose) | |
a9a79dfe JP |
2853 | ata_link_info(link, |
2854 | "no reset method available, skipping reset\n"); | |
932648b0 TH |
2855 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) |
2856 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2857 | } |
2858 | ||
932648b0 TH |
2859 | /* |
2860 | * Post-reset processing | |
2861 | */ | |
1eca4365 | 2862 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2863 | /* After the reset, the device state is PIO 0 and the |
2864 | * controller state is undefined. Reset also wakes up | |
2865 | * drives from sleeping mode. | |
2866 | */ | |
2867 | dev->pio_mode = XFER_PIO_0; | |
2868 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2869 | |
3b761d3d TH |
2870 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
2871 | continue; | |
2872 | ||
2873 | /* apply class override */ | |
2874 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2875 | classes[dev->devno] = ATA_DEV_ATA; | |
2876 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2877 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
022bdb07 TH |
2878 | } |
2879 | ||
416dc9ed TH |
2880 | /* record current link speed */ |
2881 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2882 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2883 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2884 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2885 | |
dc98c32c TH |
2886 | /* thaw the port */ |
2887 | if (ata_is_host_link(link)) | |
2888 | ata_eh_thaw_port(ap); | |
2889 | ||
f046519f TH |
2890 | /* postreset() should clear hardware SError. Although SError |
2891 | * is cleared during link resume, clearing SError here is | |
2892 | * necessary as some PHYs raise hotplug events after SRST. | |
2893 | * This introduces race condition where hotplug occurs between | |
2894 | * reset and here. This race is mediated by cross checking | |
2895 | * link onlineness and classification result later. | |
2896 | */ | |
b1c72916 | 2897 | if (postreset) { |
416dc9ed | 2898 | postreset(link, classes); |
b1c72916 TH |
2899 | if (slave) |
2900 | postreset(slave, classes); | |
2901 | } | |
20952b69 | 2902 | |
1e641060 | 2903 | /* |
8c56cacc TH |
2904 | * Some controllers can't be frozen very well and may set spurious |
2905 | * error conditions during reset. Clear accumulated error | |
2906 | * information and re-thaw the port if frozen. As reset is the | |
2907 | * final recovery action and we cross check link onlineness against | |
2908 | * device classification later, no hotplug event is lost by this. | |
1e641060 | 2909 | */ |
f046519f | 2910 | spin_lock_irqsave(link->ap->lock, flags); |
1e641060 | 2911 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
b1c72916 | 2912 | if (slave) |
1e641060 TH |
2913 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
2914 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
f046519f TH |
2915 | spin_unlock_irqrestore(link->ap->lock, flags); |
2916 | ||
8c56cacc TH |
2917 | if (ap->pflags & ATA_PFLAG_FROZEN) |
2918 | ata_eh_thaw_port(ap); | |
2919 | ||
3b761d3d TH |
2920 | /* |
2921 | * Make sure onlineness and classification result correspond. | |
f046519f TH |
2922 | * Hotplug could have happened during reset and some |
2923 | * controllers fail to wait while a drive is spinning up after | |
2924 | * being hotplugged causing misdetection. By cross checking | |
3b761d3d TH |
2925 | * link on/offlineness and classification result, those |
2926 | * conditions can be reliably detected and retried. | |
f046519f | 2927 | */ |
b1c72916 | 2928 | nr_unknown = 0; |
1eca4365 | 2929 | ata_for_each_dev(dev, link, ALL) { |
3b761d3d TH |
2930 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
2931 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe | 2932 | ata_dev_dbg(dev, "link online but device misclassified\n"); |
3b761d3d | 2933 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2934 | nr_unknown++; |
3b761d3d TH |
2935 | } |
2936 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { | |
2937 | if (ata_class_enabled(classes[dev->devno])) | |
a9a79dfe JP |
2938 | ata_dev_dbg(dev, |
2939 | "link offline, clearing class %d to NONE\n", | |
2940 | classes[dev->devno]); | |
3b761d3d TH |
2941 | classes[dev->devno] = ATA_DEV_NONE; |
2942 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe JP |
2943 | ata_dev_dbg(dev, |
2944 | "link status unknown, clearing UNKNOWN to NONE\n"); | |
3b761d3d | 2945 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2946 | } |
f046519f TH |
2947 | } |
2948 | ||
b1c72916 | 2949 | if (classify && nr_unknown) { |
f046519f | 2950 | if (try < max_tries) { |
a9a79dfe JP |
2951 | ata_link_warn(link, |
2952 | "link online but %d devices misclassified, retrying\n", | |
2953 | nr_unknown); | |
b1c72916 | 2954 | failed_link = link; |
f046519f TH |
2955 | rc = -EAGAIN; |
2956 | goto fail; | |
2957 | } | |
a9a79dfe JP |
2958 | ata_link_warn(link, |
2959 | "link online but %d devices misclassified, " | |
2960 | "device detection might fail\n", nr_unknown); | |
f046519f TH |
2961 | } |
2962 | ||
416dc9ed | 2963 | /* reset successful, schedule revalidation */ |
cf480626 | 2964 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2965 | if (slave) |
2966 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
6b7ae954 | 2967 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2968 | ehc->i.action |= ATA_EH_REVALIDATE; |
6b7ae954 | 2969 | link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */ |
ae791c05 | 2970 | |
416dc9ed | 2971 | rc = 0; |
fccb6ea5 TH |
2972 | out: |
2973 | /* clear hotplug flag */ | |
2974 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2975 | if (slave) |
2976 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2977 | |
2978 | spin_lock_irqsave(ap->lock, flags); | |
2979 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2980 | spin_unlock_irqrestore(ap->lock, flags); | |
2981 | ||
022bdb07 | 2982 | return rc; |
416dc9ed TH |
2983 | |
2984 | fail: | |
5958e302 TH |
2985 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2986 | if (!ata_is_host_link(link) && | |
2987 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2988 | rc = -ERESTART; | |
2989 | ||
7a46c078 | 2990 | if (try >= max_tries) { |
8ea7645c TH |
2991 | /* |
2992 | * Thaw host port even if reset failed, so that the port | |
2993 | * can be retried on the next phy event. This risks | |
2994 | * repeated EH runs but seems to be a better tradeoff than | |
2995 | * shutting down a port after a botched hotplug attempt. | |
2996 | */ | |
2997 | if (ata_is_host_link(link)) | |
2998 | ata_eh_thaw_port(ap); | |
416dc9ed | 2999 | goto out; |
8ea7645c | 3000 | } |
416dc9ed TH |
3001 | |
3002 | now = jiffies; | |
3003 | if (time_before(now, deadline)) { | |
3004 | unsigned long delta = deadline - now; | |
3005 | ||
a9a79dfe | 3006 | ata_link_warn(failed_link, |
0a2c0f56 TH |
3007 | "reset failed (errno=%d), retrying in %u secs\n", |
3008 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed | 3009 | |
c0c362b6 | 3010 | ata_eh_release(ap); |
416dc9ed TH |
3011 | while (delta) |
3012 | delta = schedule_timeout_uninterruptible(delta); | |
c0c362b6 | 3013 | ata_eh_acquire(ap); |
416dc9ed TH |
3014 | } |
3015 | ||
7a46c078 GG |
3016 | /* |
3017 | * While disks spinup behind PMP, some controllers fail sending SRST. | |
3018 | * They need to be reset - as well as the PMP - before retrying. | |
3019 | */ | |
3020 | if (rc == -ERESTART) { | |
3021 | if (ata_is_host_link(link)) | |
3022 | ata_eh_thaw_port(ap); | |
3023 | goto out; | |
3024 | } | |
3025 | ||
b1c72916 | 3026 | if (try == max_tries - 1) { |
a07d499b | 3027 | sata_down_spd_limit(link, 0); |
b1c72916 | 3028 | if (slave) |
a07d499b | 3029 | sata_down_spd_limit(slave, 0); |
b1c72916 | 3030 | } else if (rc == -EPIPE) |
a07d499b | 3031 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 3032 | |
416dc9ed TH |
3033 | if (hardreset) |
3034 | reset = hardreset; | |
3035 | goto retry; | |
022bdb07 TH |
3036 | } |
3037 | ||
45fabbb7 EO |
3038 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
3039 | { | |
3040 | struct ata_link *link; | |
3041 | struct ata_device *dev; | |
3042 | unsigned long flags; | |
3043 | ||
3044 | /* | |
3045 | * This function can be thought of as an extended version of | |
3046 | * ata_eh_about_to_do() specially crafted to accommodate the | |
3047 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
3048 | * does not leave the do {} while () loop in ata_eh_recover as | |
3049 | * long as the timeout for a park request to *one* device on | |
3050 | * the port has not expired, and since we still want to pick | |
3051 | * up park requests to other devices on the same port or | |
3052 | * timeout updates for the same device, we have to pull | |
3053 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
3054 | * ourselves at the beginning of each pass over the loop. | |
3055 | * | |
3056 | * Additionally, all write accesses to &ap->park_req_pending | |
16735d02 | 3057 | * through reinit_completion() (see below) or complete_all() |
45fabbb7 EO |
3058 | * (see ata_scsi_park_store()) are protected by the host lock. |
3059 | * As a result we have that park_req_pending.done is zero on | |
3060 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
3061 | * *all* devices on port ap have been pulled into the | |
3062 | * respective eh_context structs. If, and only if, | |
3063 | * park_req_pending.done is non-zero by the time we reach | |
3064 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
3065 | * has been scheduled for at least one of the devices on port | |
3066 | * ap and we have to cycle over the do {} while () loop in | |
3067 | * ata_eh_recover() again. | |
3068 | */ | |
3069 | ||
3070 | spin_lock_irqsave(ap->lock, flags); | |
16735d02 | 3071 | reinit_completion(&ap->park_req_pending); |
1eca4365 TH |
3072 | ata_for_each_link(link, ap, EDGE) { |
3073 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3074 | struct ata_eh_info *ehi = &link->eh_info; |
3075 | ||
3076 | link->eh_context.i.dev_action[dev->devno] |= | |
3077 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
3078 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
3079 | } | |
3080 | } | |
3081 | spin_unlock_irqrestore(ap->lock, flags); | |
3082 | } | |
3083 | ||
3084 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
3085 | { | |
3086 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
3087 | struct ata_taskfile tf; | |
3088 | unsigned int err_mask; | |
3089 | ||
3090 | ata_tf_init(dev, &tf); | |
3091 | if (park) { | |
3092 | ehc->unloaded_mask |= 1 << dev->devno; | |
3093 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
3094 | tf.feature = 0x44; | |
3095 | tf.lbal = 0x4c; | |
3096 | tf.lbam = 0x4e; | |
3097 | tf.lbah = 0x55; | |
3098 | } else { | |
3099 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
3100 | tf.command = ATA_CMD_CHK_POWER; | |
3101 | } | |
3102 | ||
3103 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
bd18bc04 | 3104 | tf.protocol = ATA_PROT_NODATA; |
45fabbb7 EO |
3105 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
3106 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
a9a79dfe | 3107 | ata_dev_err(dev, "head unload failed!\n"); |
45fabbb7 EO |
3108 | ehc->unloaded_mask &= ~(1 << dev->devno); |
3109 | } | |
3110 | } | |
3111 | ||
0260731f | 3112 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 3113 | struct ata_device **r_failed_dev) |
022bdb07 | 3114 | { |
0260731f TH |
3115 | struct ata_port *ap = link->ap; |
3116 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 3117 | struct ata_device *dev; |
8c3c52a8 | 3118 | unsigned int new_mask = 0; |
084fe639 | 3119 | unsigned long flags; |
f58229f8 | 3120 | int rc = 0; |
022bdb07 TH |
3121 | |
3122 | DPRINTK("ENTER\n"); | |
3123 | ||
8c3c52a8 TH |
3124 | /* For PATA drive side cable detection to work, IDENTIFY must |
3125 | * be done backwards such that PDIAG- is released by the slave | |
3126 | * device before the master device is identified. | |
3127 | */ | |
1eca4365 | 3128 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
3129 | unsigned int action = ata_eh_dev_action(dev); |
3130 | unsigned int readid_flags = 0; | |
022bdb07 | 3131 | |
bff04647 TH |
3132 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
3133 | readid_flags |= ATA_READID_POSTRESET; | |
3134 | ||
9666f400 | 3135 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
3136 | WARN_ON(dev->class == ATA_DEV_PMP); |
3137 | ||
b1c72916 | 3138 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 3139 | rc = -EIO; |
8c3c52a8 | 3140 | goto err; |
022bdb07 TH |
3141 | } |
3142 | ||
0260731f | 3143 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
3144 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
3145 | readid_flags); | |
022bdb07 | 3146 | if (rc) |
8c3c52a8 | 3147 | goto err; |
022bdb07 | 3148 | |
0260731f | 3149 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 3150 | |
baa1e78a TH |
3151 | /* Configuration may have changed, reconfigure |
3152 | * transfer mode. | |
3153 | */ | |
3154 | ehc->i.flags |= ATA_EHI_SETMODE; | |
3155 | ||
3057ac3c | 3156 | /* schedule the scsi_rescan_device() here */ |
ad72cf98 | 3157 | schedule_work(&(ap->scsi_rescan_task)); |
084fe639 TH |
3158 | } else if (dev->class == ATA_DEV_UNKNOWN && |
3159 | ehc->tries[dev->devno] && | |
3160 | ata_class_enabled(ehc->classes[dev->devno])) { | |
842faa6c TH |
3161 | /* Temporarily set dev->class, it will be |
3162 | * permanently set once all configurations are | |
3163 | * complete. This is necessary because new | |
3164 | * device configuration is done in two | |
3165 | * separate loops. | |
3166 | */ | |
084fe639 TH |
3167 | dev->class = ehc->classes[dev->devno]; |
3168 | ||
633273a3 TH |
3169 | if (dev->class == ATA_DEV_PMP) |
3170 | rc = sata_pmp_attach(dev); | |
3171 | else | |
3172 | rc = ata_dev_read_id(dev, &dev->class, | |
3173 | readid_flags, dev->id); | |
842faa6c TH |
3174 | |
3175 | /* read_id might have changed class, store and reset */ | |
3176 | ehc->classes[dev->devno] = dev->class; | |
3177 | dev->class = ATA_DEV_UNKNOWN; | |
3178 | ||
8c3c52a8 TH |
3179 | switch (rc) { |
3180 | case 0: | |
99cf610a TH |
3181 | /* clear error info accumulated during probe */ |
3182 | ata_ering_clear(&dev->ering); | |
f58229f8 | 3183 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
3184 | break; |
3185 | case -ENOENT: | |
55a8e2c8 TH |
3186 | /* IDENTIFY was issued to non-existent |
3187 | * device. No need to reset. Just | |
842faa6c | 3188 | * thaw and ignore the device. |
55a8e2c8 TH |
3189 | */ |
3190 | ata_eh_thaw_port(ap); | |
084fe639 | 3191 | break; |
8c3c52a8 | 3192 | default: |
8c3c52a8 | 3193 | goto err; |
084fe639 | 3194 | } |
8c3c52a8 TH |
3195 | } |
3196 | } | |
084fe639 | 3197 | |
c1c4e8d5 | 3198 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
3199 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
3200 | if (ap->ops->cable_detect) | |
3201 | ap->cbl = ap->ops->cable_detect(ap); | |
3202 | ata_force_cbl(ap); | |
3203 | } | |
c1c4e8d5 | 3204 | |
8c3c52a8 TH |
3205 | /* Configure new devices forward such that user doesn't see |
3206 | * device detection messages backwards. | |
3207 | */ | |
1eca4365 | 3208 | ata_for_each_dev(dev, link, ALL) { |
4f7c2874 | 3209 | if (!(new_mask & (1 << dev->devno))) |
8c3c52a8 TH |
3210 | continue; |
3211 | ||
842faa6c TH |
3212 | dev->class = ehc->classes[dev->devno]; |
3213 | ||
4f7c2874 TH |
3214 | if (dev->class == ATA_DEV_PMP) |
3215 | continue; | |
3216 | ||
8c3c52a8 TH |
3217 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
3218 | rc = ata_dev_configure(dev); | |
3219 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
842faa6c TH |
3220 | if (rc) { |
3221 | dev->class = ATA_DEV_UNKNOWN; | |
8c3c52a8 | 3222 | goto err; |
842faa6c | 3223 | } |
8c3c52a8 TH |
3224 | |
3225 | spin_lock_irqsave(ap->lock, flags); | |
3226 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
3227 | spin_unlock_irqrestore(ap->lock, flags); | |
3228 | ||
3229 | /* new device discovered, configure xfermode */ | |
3230 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
3231 | } |
3232 | ||
8c3c52a8 | 3233 | return 0; |
022bdb07 | 3234 | |
8c3c52a8 TH |
3235 | err: |
3236 | *r_failed_dev = dev; | |
3237 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
3238 | return rc; |
3239 | } | |
3240 | ||
6f1d1e3a TH |
3241 | /** |
3242 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
3243 | * @link: link on which timings will be programmed | |
98a1708d | 3244 | * @r_failed_dev: out parameter for failed device |
6f1d1e3a TH |
3245 | * |
3246 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3247 | * ata_set_mode() fails, pointer to the failing device is | |
3248 | * returned in @r_failed_dev. | |
3249 | * | |
3250 | * LOCKING: | |
3251 | * PCI/etc. bus probe sem. | |
3252 | * | |
3253 | * RETURNS: | |
3254 | * 0 on success, negative errno otherwise | |
3255 | */ | |
3256 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
3257 | { | |
3258 | struct ata_port *ap = link->ap; | |
00115e0f TH |
3259 | struct ata_device *dev; |
3260 | int rc; | |
6f1d1e3a | 3261 | |
76326ac1 | 3262 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 3263 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
3264 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
3265 | struct ata_ering_entry *ent; | |
3266 | ||
3267 | ent = ata_ering_top(&dev->ering); | |
3268 | if (ent) | |
3269 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
3270 | } | |
3271 | } | |
3272 | ||
6f1d1e3a TH |
3273 | /* has private set_mode? */ |
3274 | if (ap->ops->set_mode) | |
00115e0f TH |
3275 | rc = ap->ops->set_mode(link, r_failed_dev); |
3276 | else | |
3277 | rc = ata_do_set_mode(link, r_failed_dev); | |
3278 | ||
3279 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 3280 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
3281 | struct ata_eh_context *ehc = &link->eh_context; |
3282 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
3283 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
3284 | ||
3285 | if (dev->xfer_mode != saved_xfer_mode || | |
3286 | ata_ncq_enabled(dev) != saved_ncq) | |
3287 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
3288 | } | |
3289 | ||
3290 | return rc; | |
6f1d1e3a TH |
3291 | } |
3292 | ||
11fc33da TH |
3293 | /** |
3294 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
3295 | * @dev: ATAPI device to clear UA for | |
3296 | * | |
3297 | * Resets and other operations can make an ATAPI device raise | |
3298 | * UNIT ATTENTION which causes the next operation to fail. This | |
3299 | * function clears UA. | |
3300 | * | |
3301 | * LOCKING: | |
3302 | * EH context (may sleep). | |
3303 | * | |
3304 | * RETURNS: | |
3305 | * 0 on success, -errno on failure. | |
3306 | */ | |
3307 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
3308 | { | |
3309 | int i; | |
3310 | ||
3311 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 3312 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
3313 | u8 sense_key = 0; |
3314 | unsigned int err_mask; | |
3315 | ||
3316 | err_mask = atapi_eh_tur(dev, &sense_key); | |
3317 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3318 | ata_dev_warn(dev, |
3319 | "TEST_UNIT_READY failed (err_mask=0x%x)\n", | |
3320 | err_mask); | |
11fc33da TH |
3321 | return -EIO; |
3322 | } | |
3323 | ||
3324 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
3325 | return 0; | |
3326 | ||
3327 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
3328 | if (err_mask) { | |
a9a79dfe | 3329 | ata_dev_warn(dev, "failed to clear " |
11fc33da TH |
3330 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); |
3331 | return -EIO; | |
3332 | } | |
3333 | } | |
3334 | ||
a9a79dfe JP |
3335 | ata_dev_warn(dev, "UNIT ATTENTION persists after %d tries\n", |
3336 | ATA_EH_UA_TRIES); | |
11fc33da TH |
3337 | |
3338 | return 0; | |
3339 | } | |
3340 | ||
6013efd8 TH |
3341 | /** |
3342 | * ata_eh_maybe_retry_flush - Retry FLUSH if necessary | |
3343 | * @dev: ATA device which may need FLUSH retry | |
3344 | * | |
3345 | * If @dev failed FLUSH, it needs to be reported upper layer | |
3346 | * immediately as it means that @dev failed to remap and already | |
3347 | * lost at least a sector and further FLUSH retrials won't make | |
3348 | * any difference to the lost sector. However, if FLUSH failed | |
3349 | * for other reasons, for example transmission error, FLUSH needs | |
3350 | * to be retried. | |
3351 | * | |
3352 | * This function determines whether FLUSH failure retry is | |
3353 | * necessary and performs it if so. | |
3354 | * | |
3355 | * RETURNS: | |
3356 | * 0 if EH can continue, -errno if EH needs to be repeated. | |
3357 | */ | |
3358 | static int ata_eh_maybe_retry_flush(struct ata_device *dev) | |
3359 | { | |
3360 | struct ata_link *link = dev->link; | |
3361 | struct ata_port *ap = link->ap; | |
3362 | struct ata_queued_cmd *qc; | |
3363 | struct ata_taskfile tf; | |
3364 | unsigned int err_mask; | |
3365 | int rc = 0; | |
3366 | ||
3367 | /* did flush fail for this device? */ | |
3368 | if (!ata_tag_valid(link->active_tag)) | |
3369 | return 0; | |
3370 | ||
3371 | qc = __ata_qc_from_tag(ap, link->active_tag); | |
3372 | if (qc->dev != dev || (qc->tf.command != ATA_CMD_FLUSH_EXT && | |
3373 | qc->tf.command != ATA_CMD_FLUSH)) | |
3374 | return 0; | |
3375 | ||
3376 | /* if the device failed it, it should be reported to upper layers */ | |
3377 | if (qc->err_mask & AC_ERR_DEV) | |
3378 | return 0; | |
3379 | ||
3380 | /* flush failed for some other reason, give it another shot */ | |
3381 | ata_tf_init(dev, &tf); | |
3382 | ||
3383 | tf.command = qc->tf.command; | |
3384 | tf.flags |= ATA_TFLAG_DEVICE; | |
3385 | tf.protocol = ATA_PROT_NODATA; | |
3386 | ||
a9a79dfe | 3387 | ata_dev_warn(dev, "retrying FLUSH 0x%x Emask 0x%x\n", |
6013efd8 TH |
3388 | tf.command, qc->err_mask); |
3389 | ||
3390 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
3391 | if (!err_mask) { | |
3392 | /* | |
3393 | * FLUSH is complete but there's no way to | |
3394 | * successfully complete a failed command from EH. | |
3395 | * Making sure retry is allowed at least once and | |
3396 | * retrying it should do the trick - whatever was in | |
3397 | * the cache is already on the platter and this won't | |
3398 | * cause infinite loop. | |
3399 | */ | |
3400 | qc->scsicmd->allowed = max(qc->scsicmd->allowed, 1); | |
3401 | } else { | |
a9a79dfe | 3402 | ata_dev_warn(dev, "FLUSH failed Emask 0x%x\n", |
6013efd8 TH |
3403 | err_mask); |
3404 | rc = -EIO; | |
3405 | ||
3406 | /* if device failed it, report it to upper layers */ | |
3407 | if (err_mask & AC_ERR_DEV) { | |
3408 | qc->err_mask |= AC_ERR_DEV; | |
3409 | qc->result_tf = tf; | |
3410 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
3411 | rc = 0; | |
3412 | } | |
3413 | } | |
3414 | return rc; | |
3415 | } | |
3416 | ||
6b7ae954 TH |
3417 | /** |
3418 | * ata_eh_set_lpm - configure SATA interface power management | |
3419 | * @link: link to configure power management | |
3420 | * @policy: the link power management policy | |
3421 | * @r_failed_dev: out parameter for failed device | |
3422 | * | |
3423 | * Enable SATA Interface power management. This will enable | |
f4ac6476 HG |
3424 | * Device Interface Power Management (DIPM) for min_power and |
3425 | * medium_power_with_dipm policies, and then call driver specific | |
3426 | * callbacks for enabling Host Initiated Power management. | |
6b7ae954 TH |
3427 | * |
3428 | * LOCKING: | |
3429 | * EH context. | |
3430 | * | |
3431 | * RETURNS: | |
3432 | * 0 on success, -errno on failure. | |
3433 | */ | |
3434 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
3435 | struct ata_device **r_failed_dev) | |
3436 | { | |
6c8ea89c | 3437 | struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL; |
6b7ae954 TH |
3438 | struct ata_eh_context *ehc = &link->eh_context; |
3439 | struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; | |
e5005b15 | 3440 | enum ata_lpm_policy old_policy = link->lpm_policy; |
5f6f12cc | 3441 | bool no_dipm = link->ap->flags & ATA_FLAG_NO_DIPM; |
6b7ae954 TH |
3442 | unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; |
3443 | unsigned int err_mask; | |
3444 | int rc; | |
3445 | ||
3446 | /* if the link or host doesn't do LPM, noop */ | |
3447 | if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) | |
3448 | return 0; | |
3449 | ||
3450 | /* | |
3451 | * DIPM is enabled only for MIN_POWER as some devices | |
3452 | * misbehave when the host NACKs transition to SLUMBER. Order | |
3453 | * device and link configurations such that the host always | |
3454 | * allows DIPM requests. | |
3455 | */ | |
3456 | ata_for_each_dev(dev, link, ENABLED) { | |
3457 | bool hipm = ata_id_has_hipm(dev->id); | |
ae01b249 | 3458 | bool dipm = ata_id_has_dipm(dev->id) && !no_dipm; |
6b7ae954 TH |
3459 | |
3460 | /* find the first enabled and LPM enabled devices */ | |
3461 | if (!link_dev) | |
3462 | link_dev = dev; | |
3463 | ||
3464 | if (!lpm_dev && (hipm || dipm)) | |
3465 | lpm_dev = dev; | |
3466 | ||
3467 | hints &= ~ATA_LPM_EMPTY; | |
3468 | if (!hipm) | |
3469 | hints &= ~ATA_LPM_HIPM; | |
3470 | ||
3471 | /* disable DIPM before changing link config */ | |
f4ac6476 | 3472 | if (policy < ATA_LPM_MED_POWER_WITH_DIPM && dipm) { |
6b7ae954 TH |
3473 | err_mask = ata_dev_set_feature(dev, |
3474 | SETFEATURES_SATA_DISABLE, SATA_DIPM); | |
3475 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3476 | ata_dev_warn(dev, |
3477 | "failed to disable DIPM, Emask 0x%x\n", | |
3478 | err_mask); | |
6b7ae954 TH |
3479 | rc = -EIO; |
3480 | goto fail; | |
3481 | } | |
3482 | } | |
3483 | } | |
3484 | ||
6c8ea89c TH |
3485 | if (ap) { |
3486 | rc = ap->ops->set_lpm(link, policy, hints); | |
3487 | if (!rc && ap->slave_link) | |
3488 | rc = ap->ops->set_lpm(ap->slave_link, policy, hints); | |
3489 | } else | |
3490 | rc = sata_pmp_set_lpm(link, policy, hints); | |
6b7ae954 TH |
3491 | |
3492 | /* | |
3493 | * Attribute link config failure to the first (LPM) enabled | |
3494 | * device on the link. | |
3495 | */ | |
3496 | if (rc) { | |
3497 | if (rc == -EOPNOTSUPP) { | |
3498 | link->flags |= ATA_LFLAG_NO_LPM; | |
3499 | return 0; | |
3500 | } | |
3501 | dev = lpm_dev ? lpm_dev : link_dev; | |
3502 | goto fail; | |
3503 | } | |
3504 | ||
e5005b15 TH |
3505 | /* |
3506 | * Low level driver acked the transition. Issue DIPM command | |
3507 | * with the new policy set. | |
3508 | */ | |
3509 | link->lpm_policy = policy; | |
3510 | if (ap && ap->slave_link) | |
3511 | ap->slave_link->lpm_policy = policy; | |
3512 | ||
6b7ae954 TH |
3513 | /* host config updated, enable DIPM if transitioning to MIN_POWER */ |
3514 | ata_for_each_dev(dev, link, ENABLED) { | |
f4ac6476 | 3515 | if (policy >= ATA_LPM_MED_POWER_WITH_DIPM && !no_dipm && |
ae01b249 | 3516 | ata_id_has_dipm(dev->id)) { |
6b7ae954 TH |
3517 | err_mask = ata_dev_set_feature(dev, |
3518 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
3519 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe | 3520 | ata_dev_warn(dev, |
6b7ae954 TH |
3521 | "failed to enable DIPM, Emask 0x%x\n", |
3522 | err_mask); | |
3523 | rc = -EIO; | |
3524 | goto fail; | |
3525 | } | |
3526 | } | |
3527 | } | |
3528 | ||
09c5b480 GM |
3529 | link->last_lpm_change = jiffies; |
3530 | link->flags |= ATA_LFLAG_CHANGED; | |
3531 | ||
6b7ae954 TH |
3532 | return 0; |
3533 | ||
3534 | fail: | |
e5005b15 TH |
3535 | /* restore the old policy */ |
3536 | link->lpm_policy = old_policy; | |
3537 | if (ap && ap->slave_link) | |
3538 | ap->slave_link->lpm_policy = old_policy; | |
3539 | ||
6b7ae954 TH |
3540 | /* if no device or only one more chance is left, disable LPM */ |
3541 | if (!dev || ehc->tries[dev->devno] <= 2) { | |
a9a79dfe | 3542 | ata_link_warn(link, "disabling LPM on the link\n"); |
6b7ae954 TH |
3543 | link->flags |= ATA_LFLAG_NO_LPM; |
3544 | } | |
3545 | if (r_failed_dev) | |
3546 | *r_failed_dev = dev; | |
3547 | return rc; | |
3548 | } | |
3549 | ||
8a745f1f | 3550 | int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 3551 | { |
f58229f8 TH |
3552 | struct ata_device *dev; |
3553 | int cnt = 0; | |
022bdb07 | 3554 | |
1eca4365 TH |
3555 | ata_for_each_dev(dev, link, ENABLED) |
3556 | cnt++; | |
022bdb07 TH |
3557 | return cnt; |
3558 | } | |
3559 | ||
0260731f | 3560 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 3561 | { |
f58229f8 TH |
3562 | struct ata_device *dev; |
3563 | int cnt = 0; | |
084fe639 | 3564 | |
1eca4365 | 3565 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 3566 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
3567 | cnt++; |
3568 | return cnt; | |
3569 | } | |
3570 | ||
0260731f | 3571 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 3572 | { |
672b2d65 | 3573 | struct ata_port *ap = link->ap; |
0260731f | 3574 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 3575 | struct ata_device *dev; |
084fe639 | 3576 | |
f9df58cb TH |
3577 | /* skip disabled links */ |
3578 | if (link->flags & ATA_LFLAG_DISABLED) | |
3579 | return 1; | |
3580 | ||
e2f3d75f TH |
3581 | /* skip if explicitly requested */ |
3582 | if (ehc->i.flags & ATA_EHI_NO_RECOVERY) | |
3583 | return 1; | |
3584 | ||
672b2d65 TH |
3585 | /* thaw frozen port and recover failed devices */ |
3586 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
3587 | return 0; | |
3588 | ||
3589 | /* reset at least once if reset is requested */ | |
3590 | if ((ehc->i.action & ATA_EH_RESET) && | |
3591 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
3592 | return 0; |
3593 | ||
3594 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 3595 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
3596 | if (dev->class == ATA_DEV_UNKNOWN && |
3597 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
3598 | return 0; | |
3599 | } | |
3600 | ||
3601 | return 1; | |
3602 | } | |
3603 | ||
c2c7a89c TH |
3604 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
3605 | { | |
3606 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
3607 | u64 now = get_jiffies_64(); | |
3608 | int *trials = void_arg; | |
3609 | ||
6868225e LM |
3610 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || |
3611 | (ent->timestamp < now - min(now, interval))) | |
c2c7a89c TH |
3612 | return -1; |
3613 | ||
3614 | (*trials)++; | |
3615 | return 0; | |
3616 | } | |
3617 | ||
02c05a27 TH |
3618 | static int ata_eh_schedule_probe(struct ata_device *dev) |
3619 | { | |
3620 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3621 | struct ata_link *link = ata_dev_phys_link(dev); |
3622 | int trials = 0; | |
02c05a27 TH |
3623 | |
3624 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3625 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3626 | return 0; | |
3627 | ||
3628 | ata_eh_detach_dev(dev); | |
3629 | ata_dev_init(dev); | |
3630 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3631 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3632 | ehc->saved_xfer_mode[dev->devno] = 0; |
3633 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3634 | |
6b7ae954 | 3635 | /* the link maybe in a deep sleep, wake it up */ |
6c8ea89c TH |
3636 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { |
3637 | if (ata_is_host_link(link)) | |
3638 | link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER, | |
3639 | ATA_LPM_EMPTY); | |
3640 | else | |
3641 | sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER, | |
3642 | ATA_LPM_EMPTY); | |
3643 | } | |
6b7ae954 | 3644 | |
c2c7a89c TH |
3645 | /* Record and count probe trials on the ering. The specific |
3646 | * error mask used is irrelevant. Because a successful device | |
3647 | * detection clears the ering, this count accumulates only if | |
3648 | * there are consecutive failed probes. | |
3649 | * | |
3650 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3651 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3652 | * forced to 1.5Gbps. | |
3653 | * | |
3654 | * This is to work around cases where failed link speed | |
3655 | * negotiation results in device misdetection leading to | |
3656 | * infinite DEVXCHG or PHRDY CHG events. | |
3657 | */ | |
3658 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3659 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3660 | ||
3661 | if (trials > ATA_EH_PROBE_TRIALS) | |
3662 | sata_down_spd_limit(link, 1); | |
3663 | ||
02c05a27 TH |
3664 | return 1; |
3665 | } | |
3666 | ||
9b1e2658 | 3667 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3668 | { |
9af5c9c9 | 3669 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3670 | |
cf9a590a TH |
3671 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3672 | * The requester is responsible for ensuring forward progress. | |
3673 | */ | |
3674 | if (err != -EAGAIN) | |
3675 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3676 | |
3677 | switch (err) { | |
3678 | case -ENODEV: | |
3679 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3680 | ehc->i.probe_mask |= (1 << dev->devno); | |
05b83605 | 3681 | /* fall through */ |
fee7ca72 TH |
3682 | case -EINVAL: |
3683 | /* give it just one more chance */ | |
3684 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
05b83605 | 3685 | /* fall through */ |
fee7ca72 | 3686 | case -EIO: |
d89293ab | 3687 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3688 | /* This is the last chance, better to slow |
3689 | * down than lose it. | |
3690 | */ | |
a07d499b | 3691 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3692 | if (dev->pio_mode > XFER_PIO_0) |
3693 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3694 | } |
3695 | } | |
3696 | ||
3697 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3698 | /* disable device if it has used up all its chances */ | |
3699 | ata_dev_disable(dev); | |
3700 | ||
3701 | /* detach if offline */ | |
b1c72916 | 3702 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3703 | ata_eh_detach_dev(dev); |
3704 | ||
02c05a27 | 3705 | /* schedule probe if necessary */ |
87fbc5a0 | 3706 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3707 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3708 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3709 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3710 | } | |
9b1e2658 TH |
3711 | |
3712 | return 1; | |
fee7ca72 | 3713 | } else { |
cf480626 | 3714 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3715 | return 0; |
fee7ca72 TH |
3716 | } |
3717 | } | |
3718 | ||
022bdb07 TH |
3719 | /** |
3720 | * ata_eh_recover - recover host port after error | |
3721 | * @ap: host port to recover | |
f5914a46 | 3722 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3723 | * @softreset: softreset method (can be NULL) |
3724 | * @hardreset: hardreset method (can be NULL) | |
3725 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3726 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3727 | * |
3728 | * This is the alpha and omega, eum and yang, heart and soul of | |
3729 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3730 | * recover each link and hotplug requests are recorded in the |
3731 | * link's eh_context. This function executes all the operations | |
3732 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3733 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3734 | * |
3735 | * LOCKING: | |
3736 | * Kernel thread context (may sleep). | |
3737 | * | |
3738 | * RETURNS: | |
3739 | * 0 on success, -errno on failure. | |
3740 | */ | |
fb7fd614 TH |
3741 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3742 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3743 | ata_postreset_fn_t postreset, | |
3744 | struct ata_link **r_failed_link) | |
022bdb07 | 3745 | { |
9b1e2658 | 3746 | struct ata_link *link; |
022bdb07 | 3747 | struct ata_device *dev; |
6b7ae954 | 3748 | int rc, nr_fails; |
45fabbb7 | 3749 | unsigned long flags, deadline; |
022bdb07 TH |
3750 | |
3751 | DPRINTK("ENTER\n"); | |
3752 | ||
3753 | /* prep for recovery */ | |
1eca4365 | 3754 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3755 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3756 | |
f9df58cb TH |
3757 | /* re-enable link? */ |
3758 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3759 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3760 | spin_lock_irqsave(ap->lock, flags); | |
3761 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3762 | spin_unlock_irqrestore(ap->lock, flags); | |
3763 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3764 | } | |
3765 | ||
1eca4365 | 3766 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3767 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3768 | ehc->tries[dev->devno] = 1; | |
3769 | else | |
3770 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3771 | |
9b1e2658 TH |
3772 | /* collect port action mask recorded in dev actions */ |
3773 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3774 | ~ATA_EH_PERDEV_MASK; | |
3775 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3776 | ||
3777 | /* process hotplug request */ | |
3778 | if (dev->flags & ATA_DFLAG_DETACH) | |
3779 | ata_eh_detach_dev(dev); | |
3780 | ||
02c05a27 TH |
3781 | /* schedule probe if necessary */ |
3782 | if (!ata_dev_enabled(dev)) | |
3783 | ata_eh_schedule_probe(dev); | |
084fe639 | 3784 | } |
022bdb07 TH |
3785 | } |
3786 | ||
3787 | retry: | |
022bdb07 TH |
3788 | rc = 0; |
3789 | ||
aeb2ecd6 | 3790 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3791 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3792 | goto out; |
3793 | ||
9b1e2658 | 3794 | /* prep for EH */ |
1eca4365 | 3795 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3796 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3797 | |
9b1e2658 TH |
3798 | /* skip EH if possible. */ |
3799 | if (ata_eh_skip_recovery(link)) | |
3800 | ehc->i.action = 0; | |
3801 | ||
1eca4365 | 3802 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3803 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3804 | } | |
084fe639 | 3805 | |
022bdb07 | 3806 | /* reset */ |
1eca4365 | 3807 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3808 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3809 | |
dc98c32c TH |
3810 | if (!(ehc->i.action & ATA_EH_RESET)) |
3811 | continue; | |
9b1e2658 | 3812 | |
dc98c32c TH |
3813 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3814 | prereset, softreset, hardreset, postreset); | |
3815 | if (rc) { | |
a9a79dfe | 3816 | ata_link_err(link, "reset failed, giving up\n"); |
dc98c32c | 3817 | goto out; |
022bdb07 | 3818 | } |
022bdb07 TH |
3819 | } |
3820 | ||
45fabbb7 EO |
3821 | do { |
3822 | unsigned long now; | |
3823 | ||
3824 | /* | |
3825 | * clears ATA_EH_PARK in eh_info and resets | |
3826 | * ap->park_req_pending | |
3827 | */ | |
3828 | ata_eh_pull_park_action(ap); | |
3829 | ||
3830 | deadline = jiffies; | |
1eca4365 TH |
3831 | ata_for_each_link(link, ap, EDGE) { |
3832 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3833 | struct ata_eh_context *ehc = &link->eh_context; |
3834 | unsigned long tmp; | |
3835 | ||
9162c657 HR |
3836 | if (dev->class != ATA_DEV_ATA && |
3837 | dev->class != ATA_DEV_ZAC) | |
45fabbb7 EO |
3838 | continue; |
3839 | if (!(ehc->i.dev_action[dev->devno] & | |
3840 | ATA_EH_PARK)) | |
3841 | continue; | |
3842 | tmp = dev->unpark_deadline; | |
3843 | if (time_before(deadline, tmp)) | |
3844 | deadline = tmp; | |
3845 | else if (time_before_eq(tmp, jiffies)) | |
3846 | continue; | |
3847 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3848 | continue; | |
3849 | ||
3850 | ata_eh_park_issue_cmd(dev, 1); | |
3851 | } | |
3852 | } | |
3853 | ||
3854 | now = jiffies; | |
3855 | if (time_before_eq(deadline, now)) | |
3856 | break; | |
3857 | ||
c0c362b6 | 3858 | ata_eh_release(ap); |
45fabbb7 EO |
3859 | deadline = wait_for_completion_timeout(&ap->park_req_pending, |
3860 | deadline - now); | |
c0c362b6 | 3861 | ata_eh_acquire(ap); |
45fabbb7 | 3862 | } while (deadline); |
1eca4365 TH |
3863 | ata_for_each_link(link, ap, EDGE) { |
3864 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3865 | if (!(link->eh_context.unloaded_mask & |
3866 | (1 << dev->devno))) | |
3867 | continue; | |
3868 | ||
3869 | ata_eh_park_issue_cmd(dev, 0); | |
3870 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3871 | } | |
3872 | } | |
3873 | ||
9b1e2658 | 3874 | /* the rest */ |
6b7ae954 TH |
3875 | nr_fails = 0; |
3876 | ata_for_each_link(link, ap, PMP_FIRST) { | |
9b1e2658 | 3877 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3878 | |
6b7ae954 TH |
3879 | if (sata_pmp_attached(ap) && ata_is_host_link(link)) |
3880 | goto config_lpm; | |
3881 | ||
9b1e2658 TH |
3882 | /* revalidate existing devices and attach new ones */ |
3883 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3884 | if (rc) |
6b7ae954 | 3885 | goto rest_fail; |
022bdb07 | 3886 | |
633273a3 TH |
3887 | /* if PMP got attached, return, pmp EH will take care of it */ |
3888 | if (link->device->class == ATA_DEV_PMP) { | |
3889 | ehc->i.action = 0; | |
3890 | return 0; | |
3891 | } | |
3892 | ||
9b1e2658 TH |
3893 | /* configure transfer mode if necessary */ |
3894 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3895 | rc = ata_set_mode(link, &dev); | |
3896 | if (rc) | |
6b7ae954 | 3897 | goto rest_fail; |
9b1e2658 TH |
3898 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
3899 | } | |
3900 | ||
11fc33da TH |
3901 | /* If reset has been issued, clear UA to avoid |
3902 | * disrupting the current users of the device. | |
3903 | */ | |
3904 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3905 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3906 | if (dev->class != ATA_DEV_ATAPI) |
3907 | continue; | |
3908 | rc = atapi_eh_clear_ua(dev); | |
3909 | if (rc) | |
6b7ae954 | 3910 | goto rest_fail; |
21334205 AL |
3911 | if (zpodd_dev_enabled(dev)) |
3912 | zpodd_post_poweron(dev); | |
11fc33da TH |
3913 | } |
3914 | } | |
3915 | ||
6013efd8 TH |
3916 | /* retry flush if necessary */ |
3917 | ata_for_each_dev(dev, link, ALL) { | |
9162c657 HR |
3918 | if (dev->class != ATA_DEV_ATA && |
3919 | dev->class != ATA_DEV_ZAC) | |
6013efd8 TH |
3920 | continue; |
3921 | rc = ata_eh_maybe_retry_flush(dev); | |
3922 | if (rc) | |
6b7ae954 | 3923 | goto rest_fail; |
6013efd8 TH |
3924 | } |
3925 | ||
6b7ae954 | 3926 | config_lpm: |
11fc33da | 3927 | /* configure link power saving */ |
6b7ae954 TH |
3928 | if (link->lpm_policy != ap->target_lpm_policy) { |
3929 | rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev); | |
3930 | if (rc) | |
3931 | goto rest_fail; | |
3932 | } | |
ca77329f | 3933 | |
9b1e2658 TH |
3934 | /* this link is okay now */ |
3935 | ehc->i.flags = 0; | |
3936 | continue; | |
022bdb07 | 3937 | |
6b7ae954 TH |
3938 | rest_fail: |
3939 | nr_fails++; | |
3940 | if (dev) | |
3941 | ata_eh_handle_dev_fail(dev, rc); | |
022bdb07 | 3942 | |
b06ce3e5 TH |
3943 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3944 | /* PMP reset requires working host port. | |
3945 | * Can't retry if it's frozen. | |
3946 | */ | |
071f44b1 | 3947 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3948 | goto out; |
9b1e2658 | 3949 | break; |
b06ce3e5 | 3950 | } |
022bdb07 TH |
3951 | } |
3952 | ||
6b7ae954 | 3953 | if (nr_fails) |
9b1e2658 | 3954 | goto retry; |
022bdb07 | 3955 | |
9b1e2658 TH |
3956 | out: |
3957 | if (rc && r_failed_link) | |
3958 | *r_failed_link = link; | |
3959 | ||
022bdb07 TH |
3960 | DPRINTK("EXIT, rc=%d\n", rc); |
3961 | return rc; | |
3962 | } | |
3963 | ||
3964 | /** | |
3965 | * ata_eh_finish - finish up EH | |
3966 | * @ap: host port to finish EH for | |
3967 | * | |
3968 | * Recovery is complete. Clean up EH states and retry or finish | |
3969 | * failed qcs. | |
3970 | * | |
3971 | * LOCKING: | |
3972 | * None. | |
3973 | */ | |
fb7fd614 | 3974 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 | 3975 | { |
258c4e5c | 3976 | struct ata_queued_cmd *qc; |
022bdb07 TH |
3977 | int tag; |
3978 | ||
3979 | /* retry or finish qcs */ | |
258c4e5c | 3980 | ata_qc_for_each_raw(ap, qc, tag) { |
022bdb07 TH |
3981 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
3982 | continue; | |
3983 | ||
3984 | if (qc->err_mask) { | |
3985 | /* FIXME: Once EH migration is complete, | |
3986 | * generate sense data in this function, | |
3987 | * considering both err_mask and tf. | |
3988 | */ | |
03faab78 | 3989 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3990 | ata_eh_qc_retry(qc); |
03faab78 TH |
3991 | else |
3992 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3993 | } else { |
3994 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3995 | ata_eh_qc_complete(qc); | |
3996 | } else { | |
3997 | /* feed zero TF to sense generation */ | |
3998 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3999 | ata_eh_qc_retry(qc); | |
4000 | } | |
4001 | } | |
4002 | } | |
da917d69 TH |
4003 | |
4004 | /* make sure nr_active_links is zero after EH */ | |
4005 | WARN_ON(ap->nr_active_links); | |
4006 | ap->nr_active_links = 0; | |
022bdb07 TH |
4007 | } |
4008 | ||
4009 | /** | |
4010 | * ata_do_eh - do standard error handling | |
4011 | * @ap: host port to handle error for | |
a1efdaba | 4012 | * |
f5914a46 | 4013 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
4014 | * @softreset: softreset method (can be NULL) |
4015 | * @hardreset: hardreset method (can be NULL) | |
4016 | * @postreset: postreset method (can be NULL) | |
4017 | * | |
4018 | * Perform standard error handling sequence. | |
4019 | * | |
4020 | * LOCKING: | |
4021 | * Kernel thread context (may sleep). | |
4022 | */ | |
f5914a46 TH |
4023 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
4024 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
4025 | ata_postreset_fn_t postreset) | |
022bdb07 | 4026 | { |
9b1e2658 TH |
4027 | struct ata_device *dev; |
4028 | int rc; | |
4029 | ||
4030 | ata_eh_autopsy(ap); | |
4031 | ata_eh_report(ap); | |
4032 | ||
4033 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
4034 | NULL); | |
4035 | if (rc) { | |
1eca4365 | 4036 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
4037 | ata_dev_disable(dev); |
4038 | } | |
4039 | ||
022bdb07 TH |
4040 | ata_eh_finish(ap); |
4041 | } | |
500530f6 | 4042 | |
a1efdaba TH |
4043 | /** |
4044 | * ata_std_error_handler - standard error handler | |
4045 | * @ap: host port to handle error for | |
4046 | * | |
4047 | * Standard error handler | |
4048 | * | |
4049 | * LOCKING: | |
4050 | * Kernel thread context (may sleep). | |
4051 | */ | |
4052 | void ata_std_error_handler(struct ata_port *ap) | |
4053 | { | |
4054 | struct ata_port_operations *ops = ap->ops; | |
4055 | ata_reset_fn_t hardreset = ops->hardreset; | |
4056 | ||
57c9efdf | 4057 | /* ignore built-in hardreset if SCR access is not available */ |
fe06e5f9 | 4058 | if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) |
a1efdaba TH |
4059 | hardreset = NULL; |
4060 | ||
4061 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
4062 | } | |
4063 | ||
6ffa01d8 | 4064 | #ifdef CONFIG_PM |
500530f6 TH |
4065 | /** |
4066 | * ata_eh_handle_port_suspend - perform port suspend operation | |
4067 | * @ap: port to suspend | |
4068 | * | |
4069 | * Suspend @ap. | |
4070 | * | |
4071 | * LOCKING: | |
4072 | * Kernel thread context (may sleep). | |
4073 | */ | |
4074 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
4075 | { | |
4076 | unsigned long flags; | |
4077 | int rc = 0; | |
3dc67440 | 4078 | struct ata_device *dev; |
500530f6 TH |
4079 | |
4080 | /* are we suspending? */ | |
4081 | spin_lock_irqsave(ap->lock, flags); | |
4082 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 4083 | ap->pm_mesg.event & PM_EVENT_RESUME) { |
500530f6 TH |
4084 | spin_unlock_irqrestore(ap->lock, flags); |
4085 | return; | |
4086 | } | |
4087 | spin_unlock_irqrestore(ap->lock, flags); | |
4088 | ||
4089 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
4090 | ||
3dc67440 AL |
4091 | /* |
4092 | * If we have a ZPODD attached, check its zero | |
4093 | * power ready status before the port is frozen. | |
a7ff60db | 4094 | * Only needed for runtime suspend. |
3dc67440 | 4095 | */ |
a7ff60db AL |
4096 | if (PMSG_IS_AUTO(ap->pm_mesg)) { |
4097 | ata_for_each_dev(dev, &ap->link, ENABLED) { | |
4098 | if (zpodd_dev_enabled(dev)) | |
4099 | zpodd_on_suspend(dev); | |
4100 | } | |
3dc67440 AL |
4101 | } |
4102 | ||
64578a3d TH |
4103 | /* tell ACPI we're suspending */ |
4104 | rc = ata_acpi_on_suspend(ap); | |
4105 | if (rc) | |
4106 | goto out; | |
4107 | ||
500530f6 TH |
4108 | /* suspend */ |
4109 | ata_eh_freeze_port(ap); | |
4110 | ||
4111 | if (ap->ops->port_suspend) | |
4112 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
4113 | ||
a7ff60db | 4114 | ata_acpi_set_state(ap, ap->pm_mesg); |
64578a3d | 4115 | out: |
bc6e7c4b | 4116 | /* update the flags */ |
500530f6 TH |
4117 | spin_lock_irqsave(ap->lock, flags); |
4118 | ||
4119 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
4120 | if (rc == 0) | |
4121 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 4122 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
4123 | ata_port_schedule_eh(ap); |
4124 | ||
500530f6 TH |
4125 | spin_unlock_irqrestore(ap->lock, flags); |
4126 | ||
4127 | return; | |
4128 | } | |
4129 | ||
4130 | /** | |
4131 | * ata_eh_handle_port_resume - perform port resume operation | |
4132 | * @ap: port to resume | |
4133 | * | |
4134 | * Resume @ap. | |
4135 | * | |
500530f6 TH |
4136 | * LOCKING: |
4137 | * Kernel thread context (may sleep). | |
4138 | */ | |
4139 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
4140 | { | |
6f9c1ea2 TH |
4141 | struct ata_link *link; |
4142 | struct ata_device *dev; | |
500530f6 | 4143 | unsigned long flags; |
500530f6 TH |
4144 | |
4145 | /* are we resuming? */ | |
4146 | spin_lock_irqsave(ap->lock, flags); | |
4147 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 4148 | !(ap->pm_mesg.event & PM_EVENT_RESUME)) { |
500530f6 TH |
4149 | spin_unlock_irqrestore(ap->lock, flags); |
4150 | return; | |
4151 | } | |
4152 | spin_unlock_irqrestore(ap->lock, flags); | |
4153 | ||
9666f400 | 4154 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 4155 | |
6f9c1ea2 TH |
4156 | /* |
4157 | * Error timestamps are in jiffies which doesn't run while | |
4158 | * suspended and PHY events during resume isn't too uncommon. | |
4159 | * When the two are combined, it can lead to unnecessary speed | |
4160 | * downs if the machine is suspended and resumed repeatedly. | |
4161 | * Clear error history. | |
4162 | */ | |
4163 | ata_for_each_link(link, ap, HOST_FIRST) | |
4164 | ata_for_each_dev(dev, link, ALL) | |
4165 | ata_ering_clear(&dev->ering); | |
4166 | ||
a7ff60db | 4167 | ata_acpi_set_state(ap, ap->pm_mesg); |
bd3adca5 | 4168 | |
500530f6 | 4169 | if (ap->ops->port_resume) |
ae867937 | 4170 | ap->ops->port_resume(ap); |
500530f6 | 4171 | |
6746544c TH |
4172 | /* tell ACPI that we're resuming */ |
4173 | ata_acpi_on_resume(ap); | |
4174 | ||
bc6e7c4b | 4175 | /* update the flags */ |
500530f6 TH |
4176 | spin_lock_irqsave(ap->lock, flags); |
4177 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
500530f6 TH |
4178 | spin_unlock_irqrestore(ap->lock, flags); |
4179 | } | |
6ffa01d8 | 4180 | #endif /* CONFIG_PM */ |