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c82ee6d3 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ece1d636 TH |
2 | /* |
3 | * libata-eh.c - libata error handling | |
4 | * | |
ece1d636 TH |
5 | * Copyright 2006 Tejun Heo <htejun@gmail.com> |
6 | * | |
ece1d636 | 7 | * libata documentation is available via 'make {ps|pdf}docs', |
9bb9a39c | 8 | * as Documentation/driver-api/libata.rst |
ece1d636 TH |
9 | * |
10 | * Hardware documentation available from http://www.t13.org/ and | |
11 | * http://www.sata-io.org/ | |
ece1d636 TH |
12 | */ |
13 | ||
ece1d636 | 14 | #include <linux/kernel.h> |
242f9dcb | 15 | #include <linux/blkdev.h> |
38789fda | 16 | #include <linux/export.h> |
2855568b | 17 | #include <linux/pci.h> |
ece1d636 TH |
18 | #include <scsi/scsi.h> |
19 | #include <scsi/scsi_host.h> | |
20 | #include <scsi/scsi_eh.h> | |
21 | #include <scsi/scsi_device.h> | |
22 | #include <scsi/scsi_cmnd.h> | |
6521148c | 23 | #include <scsi/scsi_dbg.h> |
c6fd2807 | 24 | #include "../scsi/scsi_transport_api.h" |
ece1d636 TH |
25 | |
26 | #include <linux/libata.h> | |
27 | ||
255c03d1 | 28 | #include <trace/events/libata.h> |
ece1d636 TH |
29 | #include "libata.h" |
30 | ||
7d47e8d4 | 31 | enum { |
3884f7b0 | 32 | /* speed down verdicts */ |
7d47e8d4 TH |
33 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
34 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
35 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 36 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
37 | |
38 | /* error flags */ | |
39 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 40 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
d9027470 | 41 | ATA_EFLAG_OLD_ER = (1 << 31), |
3884f7b0 TH |
42 | |
43 | /* error categories */ | |
44 | ATA_ECAT_NONE = 0, | |
45 | ATA_ECAT_ATA_BUS = 1, | |
46 | ATA_ECAT_TOUT_HSM = 2, | |
47 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
48 | ATA_ECAT_DUBIOUS_NONE = 4, |
49 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
50 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
51 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
52 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 53 | |
87fbc5a0 TH |
54 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
55 | ||
0a2c0f56 TH |
56 | /* always put at least this amount of time between resets */ |
57 | ATA_EH_RESET_COOL_DOWN = 5000, | |
58 | ||
341c2c95 TH |
59 | /* Waiting in ->prereset can never be reliable. It's |
60 | * sometimes nice to wait there but it can't be depended upon; | |
61 | * otherwise, we wouldn't be resetting. Just give it enough | |
62 | * time for most drives to spin up. | |
63 | */ | |
64 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
65 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
66 | |
67 | ATA_EH_UA_TRIES = 5, | |
c2c7a89c TH |
68 | |
69 | /* probe speed down parameters, see ata_eh_schedule_probe() */ | |
70 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ | |
71 | ATA_EH_PROBE_TRIALS = 2, | |
31daabda TH |
72 | }; |
73 | ||
74 | /* The following table determines how we sequence resets. Each entry | |
75 | * represents timeout for that try. The first try can be soft or | |
76 | * hardreset. All others are hardreset if available. In most cases | |
77 | * the first reset w/ 10sec timeout should succeed. Following entries | |
35bf8821 DW |
78 | * are mostly for error handling, hotplug and those outlier devices that |
79 | * take an exceptionally long time to recover from reset. | |
31daabda TH |
80 | */ |
81 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
82 | 10000, /* most drives spin up by 10sec */ |
83 | 10000, /* > 99% working drives spin up before 20sec */ | |
35bf8821 | 84 | 35000, /* give > 30 secs of idleness for outlier devices */ |
341c2c95 | 85 | 5000, /* and sweet one last chance */ |
d8af0eb6 | 86 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
87 | }; |
88 | ||
e06233f9 | 89 | static const unsigned int ata_eh_identify_timeouts[] = { |
87fbc5a0 TH |
90 | 5000, /* covers > 99% of successes and not too boring on failures */ |
91 | 10000, /* combined time till here is enough even for media access */ | |
92 | 30000, /* for true idiots */ | |
e06233f9 | 93 | UINT_MAX, |
87fbc5a0 TH |
94 | }; |
95 | ||
e06233f9 | 96 | static const unsigned int ata_eh_revalidate_timeouts[] = { |
68dbbe7d DLM |
97 | 15000, /* Some drives are slow to read log pages when waking-up */ |
98 | 15000, /* combined time till here is enough even for media access */ | |
e06233f9 | 99 | UINT_MAX, |
68dbbe7d DLM |
100 | }; |
101 | ||
e06233f9 | 102 | static const unsigned int ata_eh_flush_timeouts[] = { |
6013efd8 TH |
103 | 15000, /* be generous with flush */ |
104 | 15000, /* ditto */ | |
105 | 30000, /* and even more generous */ | |
e06233f9 | 106 | UINT_MAX, |
6013efd8 TH |
107 | }; |
108 | ||
e06233f9 | 109 | static const unsigned int ata_eh_other_timeouts[] = { |
87fbc5a0 TH |
110 | 5000, /* same rationale as identify timeout */ |
111 | 10000, /* ditto */ | |
112 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
e06233f9 | 113 | UINT_MAX, |
87fbc5a0 TH |
114 | }; |
115 | ||
116 | struct ata_eh_cmd_timeout_ent { | |
117 | const u8 *commands; | |
e06233f9 | 118 | const unsigned int *timeouts; |
87fbc5a0 TH |
119 | }; |
120 | ||
121 | /* The following table determines timeouts to use for EH internal | |
122 | * commands. Each table entry is a command class and matches the | |
123 | * commands the entry applies to and the timeout table to use. | |
124 | * | |
125 | * On the retry after a command timed out, the next timeout value from | |
126 | * the table is used. If the table doesn't contain further entries, | |
127 | * the last value is used. | |
128 | * | |
129 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
130 | * command class, so if SET_FEATURES times out on the first try, the | |
131 | * next try will use the second timeout value only for that class. | |
132 | */ | |
133 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
134 | static const struct ata_eh_cmd_timeout_ent | |
135 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
136 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
137 | .timeouts = ata_eh_identify_timeouts, }, | |
68dbbe7d DLM |
138 | { .commands = CMDS(ATA_CMD_READ_LOG_EXT, ATA_CMD_READ_LOG_DMA_EXT), |
139 | .timeouts = ata_eh_revalidate_timeouts, }, | |
87fbc5a0 TH |
140 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), |
141 | .timeouts = ata_eh_other_timeouts, }, | |
142 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
143 | .timeouts = ata_eh_other_timeouts, }, | |
144 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
145 | .timeouts = ata_eh_other_timeouts, }, | |
146 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
147 | .timeouts = ata_eh_other_timeouts, }, | |
6013efd8 TH |
148 | { .commands = CMDS(ATA_CMD_FLUSH, ATA_CMD_FLUSH_EXT), |
149 | .timeouts = ata_eh_flush_timeouts }, | |
87fbc5a0 TH |
150 | }; |
151 | #undef CMDS | |
152 | ||
ad9e2762 | 153 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 154 | #ifdef CONFIG_PM |
500530f6 TH |
155 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
156 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
157 | #else /* CONFIG_PM */ |
158 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
159 | { } | |
160 | ||
161 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
162 | { } | |
6ffa01d8 | 163 | #endif /* CONFIG_PM */ |
ad9e2762 | 164 | |
0d74d872 MM |
165 | static __printf(2, 0) void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, |
166 | const char *fmt, va_list args) | |
b64bbc39 TH |
167 | { |
168 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
169 | ATA_EH_DESC_LEN - ehi->desc_len, | |
170 | fmt, args); | |
171 | } | |
172 | ||
173 | /** | |
174 | * __ata_ehi_push_desc - push error description without adding separator | |
175 | * @ehi: target EHI | |
176 | * @fmt: printf format string | |
177 | * | |
178 | * Format string according to @fmt and append it to @ehi->desc. | |
179 | * | |
180 | * LOCKING: | |
181 | * spin_lock_irqsave(host lock) | |
182 | */ | |
183 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
184 | { | |
185 | va_list args; | |
186 | ||
187 | va_start(args, fmt); | |
188 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
189 | va_end(args); | |
190 | } | |
a52fbcfc | 191 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
b64bbc39 TH |
192 | |
193 | /** | |
194 | * ata_ehi_push_desc - push error description with separator | |
195 | * @ehi: target EHI | |
196 | * @fmt: printf format string | |
197 | * | |
198 | * Format string according to @fmt and append it to @ehi->desc. | |
199 | * If @ehi->desc is not empty, ", " is added in-between. | |
200 | * | |
201 | * LOCKING: | |
202 | * spin_lock_irqsave(host lock) | |
203 | */ | |
204 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
205 | { | |
206 | va_list args; | |
207 | ||
208 | if (ehi->desc_len) | |
209 | __ata_ehi_push_desc(ehi, ", "); | |
210 | ||
211 | va_start(args, fmt); | |
212 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
213 | va_end(args); | |
214 | } | |
a52fbcfc | 215 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); |
b64bbc39 TH |
216 | |
217 | /** | |
218 | * ata_ehi_clear_desc - clean error description | |
219 | * @ehi: target EHI | |
220 | * | |
221 | * Clear @ehi->desc. | |
222 | * | |
223 | * LOCKING: | |
224 | * spin_lock_irqsave(host lock) | |
225 | */ | |
226 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
227 | { | |
228 | ehi->desc[0] = '\0'; | |
229 | ehi->desc_len = 0; | |
230 | } | |
a52fbcfc | 231 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); |
b64bbc39 | 232 | |
cbcdd875 TH |
233 | /** |
234 | * ata_port_desc - append port description | |
235 | * @ap: target ATA port | |
236 | * @fmt: printf format string | |
237 | * | |
238 | * Format string according to @fmt and append it to port | |
239 | * description. If port description is not empty, " " is added | |
240 | * in-between. This function is to be used while initializing | |
241 | * ata_host. The description is printed on host registration. | |
242 | * | |
243 | * LOCKING: | |
244 | * None. | |
245 | */ | |
246 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
247 | { | |
248 | va_list args; | |
249 | ||
250 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
251 | ||
252 | if (ap->link.eh_info.desc_len) | |
253 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
254 | ||
255 | va_start(args, fmt); | |
256 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
257 | va_end(args); | |
258 | } | |
a52fbcfc | 259 | EXPORT_SYMBOL_GPL(ata_port_desc); |
cbcdd875 TH |
260 | |
261 | #ifdef CONFIG_PCI | |
cbcdd875 TH |
262 | /** |
263 | * ata_port_pbar_desc - append PCI BAR description | |
264 | * @ap: target ATA port | |
265 | * @bar: target PCI BAR | |
266 | * @offset: offset into PCI BAR | |
267 | * @name: name of the area | |
268 | * | |
269 | * If @offset is negative, this function formats a string which | |
270 | * contains the name, address, size and type of the BAR and | |
271 | * appends it to the port description. If @offset is zero or | |
272 | * positive, only name and offsetted address is appended. | |
273 | * | |
274 | * LOCKING: | |
275 | * None. | |
276 | */ | |
277 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
278 | const char *name) | |
279 | { | |
280 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
281 | char *type = ""; | |
282 | unsigned long long start, len; | |
283 | ||
284 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
285 | type = "m"; | |
286 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
287 | type = "i"; | |
288 | ||
289 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
290 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
291 | ||
292 | if (offset < 0) | |
293 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
294 | else | |
e6a73ab1 AM |
295 | ata_port_desc(ap, "%s 0x%llx", name, |
296 | start + (unsigned long long)offset); | |
cbcdd875 | 297 | } |
a52fbcfc | 298 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); |
cbcdd875 TH |
299 | #endif /* CONFIG_PCI */ |
300 | ||
87fbc5a0 TH |
301 | static int ata_lookup_timeout_table(u8 cmd) |
302 | { | |
303 | int i; | |
304 | ||
305 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
306 | const u8 *cur; | |
307 | ||
308 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
309 | if (*cur == cmd) | |
310 | return i; | |
311 | } | |
312 | ||
313 | return -1; | |
314 | } | |
315 | ||
316 | /** | |
317 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
318 | * @dev: target device | |
319 | * @cmd: internal command to be issued | |
320 | * | |
321 | * Determine timeout for internal command @cmd for @dev. | |
322 | * | |
323 | * LOCKING: | |
324 | * EH context. | |
325 | * | |
326 | * RETURNS: | |
327 | * Determined timeout. | |
328 | */ | |
e06233f9 | 329 | unsigned int ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) |
87fbc5a0 TH |
330 | { |
331 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
332 | int ent = ata_lookup_timeout_table(cmd); | |
333 | int idx; | |
334 | ||
335 | if (ent < 0) | |
336 | return ATA_EH_CMD_DFL_TIMEOUT; | |
337 | ||
338 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
339 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
340 | } | |
341 | ||
342 | /** | |
343 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
344 | * @dev: target device | |
345 | * @cmd: internal command which timed out | |
346 | * | |
347 | * Notify EH that internal command @cmd for @dev timed out. This | |
348 | * function should be called only for commands whose timeouts are | |
349 | * determined using ata_internal_cmd_timeout(). | |
350 | * | |
351 | * LOCKING: | |
352 | * EH context. | |
353 | */ | |
354 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
355 | { | |
356 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
357 | int ent = ata_lookup_timeout_table(cmd); | |
358 | int idx; | |
359 | ||
360 | if (ent < 0) | |
361 | return; | |
362 | ||
363 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
e06233f9 | 364 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != UINT_MAX) |
87fbc5a0 TH |
365 | ehc->cmd_timeout_idx[dev->devno][ent]++; |
366 | } | |
367 | ||
3884f7b0 | 368 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
369 | unsigned int err_mask) |
370 | { | |
371 | struct ata_ering_entry *ent; | |
372 | ||
373 | WARN_ON(!err_mask); | |
374 | ||
375 | ering->cursor++; | |
376 | ering->cursor %= ATA_ERING_SIZE; | |
377 | ||
378 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 379 | ent->eflags = eflags; |
0c247c55 TH |
380 | ent->err_mask = err_mask; |
381 | ent->timestamp = get_jiffies_64(); | |
382 | } | |
383 | ||
76326ac1 TH |
384 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
385 | { | |
386 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
387 | ||
388 | if (ent->err_mask) | |
389 | return ent; | |
390 | return NULL; | |
391 | } | |
392 | ||
d9027470 GG |
393 | int ata_ering_map(struct ata_ering *ering, |
394 | int (*map_fn)(struct ata_ering_entry *, void *), | |
395 | void *arg) | |
0c247c55 TH |
396 | { |
397 | int idx, rc = 0; | |
398 | struct ata_ering_entry *ent; | |
399 | ||
400 | idx = ering->cursor; | |
401 | do { | |
402 | ent = &ering->ring[idx]; | |
403 | if (!ent->err_mask) | |
404 | break; | |
405 | rc = map_fn(ent, arg); | |
406 | if (rc) | |
407 | break; | |
408 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
409 | } while (idx != ering->cursor); | |
410 | ||
411 | return rc; | |
412 | } | |
413 | ||
60428407 | 414 | static int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg) |
d9027470 GG |
415 | { |
416 | ent->eflags |= ATA_EFLAG_OLD_ER; | |
417 | return 0; | |
418 | } | |
419 | ||
420 | static void ata_ering_clear(struct ata_ering *ering) | |
421 | { | |
422 | ata_ering_map(ering, ata_ering_clear_cb, NULL); | |
423 | } | |
424 | ||
64f65ca6 TH |
425 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
426 | { | |
9af5c9c9 | 427 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
428 | |
429 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
430 | } | |
431 | ||
f58229f8 | 432 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
433 | struct ata_eh_info *ehi, unsigned int action) |
434 | { | |
f58229f8 | 435 | struct ata_device *tdev; |
af181c2d TH |
436 | |
437 | if (!dev) { | |
438 | ehi->action &= ~action; | |
1eca4365 | 439 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 440 | ehi->dev_action[tdev->devno] &= ~action; |
af181c2d TH |
441 | } else { |
442 | /* doesn't make sense for port-wide EH actions */ | |
443 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
444 | ||
445 | /* break ehi->action into ehi->dev_action */ | |
446 | if (ehi->action & action) { | |
1eca4365 | 447 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
448 | ehi->dev_action[tdev->devno] |= |
449 | ehi->action & action; | |
af181c2d TH |
450 | ehi->action &= ~action; |
451 | } | |
452 | ||
453 | /* turn off the specified per-dev action */ | |
454 | ehi->dev_action[dev->devno] &= ~action; | |
455 | } | |
456 | } | |
457 | ||
c0c362b6 TH |
458 | /** |
459 | * ata_eh_acquire - acquire EH ownership | |
460 | * @ap: ATA port to acquire EH ownership for | |
461 | * | |
462 | * Acquire EH ownership for @ap. This is the basic exclusion | |
463 | * mechanism for ports sharing a host. Only one port hanging off | |
464 | * the same host can claim the ownership of EH. | |
465 | * | |
466 | * LOCKING: | |
467 | * EH context. | |
468 | */ | |
469 | void ata_eh_acquire(struct ata_port *ap) | |
470 | { | |
471 | mutex_lock(&ap->host->eh_mutex); | |
472 | WARN_ON_ONCE(ap->host->eh_owner); | |
473 | ap->host->eh_owner = current; | |
474 | } | |
475 | ||
476 | /** | |
477 | * ata_eh_release - release EH ownership | |
478 | * @ap: ATA port to release EH ownership for | |
479 | * | |
480 | * Release EH ownership for @ap if the caller. The caller must | |
481 | * have acquired EH ownership using ata_eh_acquire() previously. | |
482 | * | |
483 | * LOCKING: | |
484 | * EH context. | |
485 | */ | |
486 | void ata_eh_release(struct ata_port *ap) | |
487 | { | |
488 | WARN_ON_ONCE(ap->host->eh_owner != current); | |
489 | ap->host->eh_owner = NULL; | |
490 | mutex_unlock(&ap->host->eh_mutex); | |
491 | } | |
492 | ||
ece180d1 TH |
493 | static void ata_eh_unload(struct ata_port *ap) |
494 | { | |
495 | struct ata_link *link; | |
496 | struct ata_device *dev; | |
497 | unsigned long flags; | |
498 | ||
499 | /* Restore SControl IPM and SPD for the next driver and | |
500 | * disable attached devices. | |
501 | */ | |
502 | ata_for_each_link(link, ap, PMP_FIRST) { | |
503 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
504 | ata_for_each_dev(dev, link, ALL) | |
505 | ata_dev_disable(dev); | |
506 | } | |
507 | ||
508 | /* freeze and set UNLOADED */ | |
509 | spin_lock_irqsave(ap->lock, flags); | |
510 | ||
511 | ata_port_freeze(ap); /* won't be thawed */ | |
512 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
513 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
514 | ||
515 | spin_unlock_irqrestore(ap->lock, flags); | |
516 | } | |
517 | ||
ece1d636 TH |
518 | /** |
519 | * ata_scsi_error - SCSI layer error handler callback | |
520 | * @host: SCSI host on which error occurred | |
521 | * | |
522 | * Handles SCSI-layer-thrown error events. | |
523 | * | |
524 | * LOCKING: | |
525 | * Inherited from SCSI layer (none, can sleep) | |
526 | * | |
527 | * RETURNS: | |
528 | * Zero. | |
529 | */ | |
381544bb | 530 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 531 | { |
35bb94b1 | 532 | struct ata_port *ap = ata_shost_to_port(host); |
ad9e2762 | 533 | unsigned long flags; |
c34aeebc | 534 | LIST_HEAD(eh_work_q); |
ece1d636 | 535 | |
c34aeebc JB |
536 | spin_lock_irqsave(host->host_lock, flags); |
537 | list_splice_init(&host->eh_cmd_q, &eh_work_q); | |
538 | spin_unlock_irqrestore(host->host_lock, flags); | |
539 | ||
0e0b494c JB |
540 | ata_scsi_cmd_error_handler(host, ap, &eh_work_q); |
541 | ||
542 | /* If we timed raced normal completion and there is nothing to | |
543 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ | |
544 | ata_scsi_port_error_handler(host, ap); | |
545 | ||
546 | /* finish or retry handled scmd's and clean up */ | |
72d8c36e | 547 | WARN_ON(!list_empty(&eh_work_q)); |
0e0b494c | 548 | |
0e0b494c JB |
549 | } |
550 | ||
551 | /** | |
552 | * ata_scsi_cmd_error_handler - error callback for a list of commands | |
553 | * @host: scsi host containing the port | |
554 | * @ap: ATA port within the host | |
555 | * @eh_work_q: list of commands to process | |
556 | * | |
557 | * process the given list of commands and return those finished to the | |
558 | * ap->eh_done_q. This function is the first part of the libata error | |
559 | * handler which processes a given list of failed commands. | |
560 | */ | |
561 | void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, | |
562 | struct list_head *eh_work_q) | |
563 | { | |
564 | int i; | |
565 | unsigned long flags; | |
566 | ||
c429137a TH |
567 | /* make sure sff pio task is not running */ |
568 | ata_sff_flush_pio_task(ap); | |
ece1d636 | 569 | |
cca3974e | 570 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
571 | |
572 | /* For new EH, all qcs are finished in one of three ways - | |
573 | * normal completion, error completion, and SCSI timeout. | |
c96f1732 | 574 | * Both completions can race against SCSI timeout. When normal |
ad9e2762 TH |
575 | * completion wins, the qc never reaches EH. When error |
576 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
577 | * | |
578 | * When SCSI timeout wins, things are a bit more complex. | |
579 | * Normal or error completion can occur after the timeout but | |
580 | * before this point. In such cases, both types of | |
581 | * completions are honored. A scmd is determined to have | |
582 | * timed out iff its associated qc is active and not failed. | |
583 | */ | |
a4f08141 | 584 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 TH |
585 | if (ap->ops->error_handler) { |
586 | struct scsi_cmnd *scmd, *tmp; | |
587 | int nr_timedout = 0; | |
588 | ||
c96f1732 AC |
589 | /* This must occur under the ap->lock as we don't want |
590 | a polled recovery to race the real interrupt handler | |
d9027470 | 591 | |
c96f1732 AC |
592 | The lost_interrupt handler checks for any completed but |
593 | non-notified command and completes much like an IRQ handler. | |
d9027470 | 594 | |
c96f1732 AC |
595 | We then fall into the error recovery code which will treat |
596 | this as if normal completion won the race */ | |
597 | ||
598 | if (ap->ops->lost_interrupt) | |
599 | ap->ops->lost_interrupt(ap); | |
d9027470 | 600 | |
0e0b494c | 601 | list_for_each_entry_safe(scmd, tmp, eh_work_q, eh_entry) { |
ad9e2762 TH |
602 | struct ata_queued_cmd *qc; |
603 | ||
258c4e5c | 604 | ata_qc_for_each_raw(ap, qc, i) { |
ad9e2762 TH |
605 | if (qc->flags & ATA_QCFLAG_ACTIVE && |
606 | qc->scsicmd == scmd) | |
607 | break; | |
608 | } | |
609 | ||
610 | if (i < ATA_MAX_QUEUE) { | |
611 | /* the scmd has an associated qc */ | |
612 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
613 | /* which hasn't failed yet, timeout */ | |
614 | qc->err_mask |= AC_ERR_TIMEOUT; | |
615 | qc->flags |= ATA_QCFLAG_FAILED; | |
616 | nr_timedout++; | |
617 | } | |
618 | } else { | |
619 | /* Normal completion occurred after | |
620 | * SCSI timeout but before this point. | |
621 | * Successfully complete it. | |
622 | */ | |
623 | scmd->retries = scmd->allowed; | |
624 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
625 | } | |
626 | } | |
627 | ||
628 | /* If we have timed out qcs. They belong to EH from | |
629 | * this point but the state of the controller is | |
630 | * unknown. Freeze the port to make sure the IRQ | |
631 | * handler doesn't diddle with those qcs. This must | |
632 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
633 | */ | |
634 | if (nr_timedout) | |
635 | __ata_port_freeze(ap); | |
636 | ||
a1e10f7e TH |
637 | |
638 | /* initialize eh_tries */ | |
639 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
a4f08141 PM |
640 | } |
641 | spin_unlock_irqrestore(ap->lock, flags); | |
d9027470 | 642 | |
0e0b494c JB |
643 | } |
644 | EXPORT_SYMBOL(ata_scsi_cmd_error_handler); | |
645 | ||
646 | /** | |
647 | * ata_scsi_port_error_handler - recover the port after the commands | |
648 | * @host: SCSI host containing the port | |
649 | * @ap: the ATA port | |
650 | * | |
651 | * Handle the recovery of the port @ap after all the commands | |
652 | * have been recovered. | |
653 | */ | |
654 | void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap) | |
655 | { | |
656 | unsigned long flags; | |
ad9e2762 | 657 | |
ad9e2762 TH |
658 | /* invoke error handler */ |
659 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
660 | struct ata_link *link; |
661 | ||
c0c362b6 TH |
662 | /* acquire EH ownership */ |
663 | ata_eh_acquire(ap); | |
664 | repeat: | |
5ddf24c5 TH |
665 | /* kill fast drain timer */ |
666 | del_timer_sync(&ap->fastdrain_timer); | |
667 | ||
500530f6 TH |
668 | /* process port resume request */ |
669 | ata_eh_handle_port_resume(ap); | |
670 | ||
f3e81b19 | 671 | /* fetch & clear EH info */ |
e30349d2 | 672 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 673 | |
1eca4365 | 674 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
675 | struct ata_eh_context *ehc = &link->eh_context; |
676 | struct ata_device *dev; | |
677 | ||
cf1b86c8 TH |
678 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
679 | link->eh_context.i = link->eh_info; | |
680 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 681 | |
1eca4365 | 682 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
683 | int devno = dev->devno; |
684 | ||
685 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
686 | if (ata_ncq_enabled(dev)) | |
687 | ehc->saved_ncq_enabled |= 1 << devno; | |
688 | } | |
cf1b86c8 | 689 | } |
f3e81b19 | 690 | |
b51e9e5d TH |
691 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
692 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 693 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 694 | |
e30349d2 | 695 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 696 | |
500530f6 TH |
697 | /* invoke EH, skip if unloading or suspended */ |
698 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 699 | ap->ops->error_handler(ap); |
ece180d1 TH |
700 | else { |
701 | /* if unloading, commence suicide */ | |
702 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
703 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
704 | ata_eh_unload(ap); | |
720ba126 | 705 | ata_eh_finish(ap); |
ece180d1 | 706 | } |
ad9e2762 | 707 | |
500530f6 TH |
708 | /* process port suspend request */ |
709 | ata_eh_handle_port_suspend(ap); | |
710 | ||
25985edc | 711 | /* Exception might have happened after ->error_handler |
ad9e2762 TH |
712 | * recovered the port but before this point. Repeat |
713 | * EH in such case. | |
714 | */ | |
e30349d2 | 715 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 716 | |
b51e9e5d | 717 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 718 | if (--ap->eh_tries) { |
e30349d2 | 719 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
720 | goto repeat; |
721 | } | |
a9a79dfe JP |
722 | ata_port_err(ap, |
723 | "EH pending after %d tries, giving up\n", | |
724 | ATA_EH_MAX_TRIES); | |
914616a3 | 725 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
726 | } |
727 | ||
f3e81b19 | 728 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 729 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 730 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 731 | |
e4a9c373 DW |
732 | /* end eh (clear host_eh_scheduled) while holding |
733 | * ap->lock such that if exception occurs after this | |
734 | * point but before EH completion, SCSI midlayer will | |
ad9e2762 TH |
735 | * re-initiate EH. |
736 | */ | |
e4a9c373 | 737 | ap->ops->end_eh(ap); |
ad9e2762 | 738 | |
e30349d2 | 739 | spin_unlock_irqrestore(ap->lock, flags); |
c0c362b6 | 740 | ata_eh_release(ap); |
ad9e2762 | 741 | } else { |
9af5c9c9 | 742 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
743 | ap->ops->eng_timeout(ap); |
744 | } | |
ece1d636 | 745 | |
ece1d636 TH |
746 | scsi_eh_flush_done_q(&ap->eh_done_q); |
747 | ||
ad9e2762 | 748 | /* clean up */ |
e30349d2 | 749 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 750 | |
1cdaf534 | 751 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 752 | ap->pflags &= ~ATA_PFLAG_LOADING; |
6f54120e JY |
753 | else if ((ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) && |
754 | !(ap->flags & ATA_FLAG_SAS_HOST)) | |
ad72cf98 | 755 | schedule_delayed_work(&ap->hotplug_task, 0); |
1cdaf534 TH |
756 | |
757 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
a9a79dfe | 758 | ata_port_info(ap, "EH complete\n"); |
580b2102 | 759 | |
b51e9e5d | 760 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 761 | |
c6cf9e99 | 762 | /* tell wait_eh that we're done */ |
b51e9e5d | 763 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
764 | wake_up_all(&ap->eh_wait_q); |
765 | ||
e30349d2 | 766 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 767 | } |
0e0b494c | 768 | EXPORT_SYMBOL_GPL(ata_scsi_port_error_handler); |
ece1d636 | 769 | |
c6cf9e99 TH |
770 | /** |
771 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
772 | * @ap: Port to wait EH for | |
773 | * | |
774 | * Wait until the currently pending EH is complete. | |
775 | * | |
776 | * LOCKING: | |
777 | * Kernel thread context (may sleep). | |
778 | */ | |
779 | void ata_port_wait_eh(struct ata_port *ap) | |
780 | { | |
781 | unsigned long flags; | |
782 | DEFINE_WAIT(wait); | |
783 | ||
784 | retry: | |
ba6a1308 | 785 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 786 | |
b51e9e5d | 787 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 788 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 789 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 790 | schedule(); |
ba6a1308 | 791 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 792 | } |
0a1b622e | 793 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 794 | |
ba6a1308 | 795 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
796 | |
797 | /* make sure SCSI EH is complete */ | |
cca3974e | 798 | if (scsi_host_in_recovery(ap->scsi_host)) { |
97750ceb | 799 | ata_msleep(ap, 10); |
c6cf9e99 TH |
800 | goto retry; |
801 | } | |
802 | } | |
81c757bc | 803 | EXPORT_SYMBOL_GPL(ata_port_wait_eh); |
c6cf9e99 | 804 | |
afae461a | 805 | static unsigned int ata_eh_nr_in_flight(struct ata_port *ap) |
5ddf24c5 | 806 | { |
258c4e5c | 807 | struct ata_queued_cmd *qc; |
5ddf24c5 | 808 | unsigned int tag; |
afae461a | 809 | unsigned int nr = 0; |
5ddf24c5 TH |
810 | |
811 | /* count only non-internal commands */ | |
258c4e5c JA |
812 | ata_qc_for_each(ap, qc, tag) { |
813 | if (qc) | |
5ddf24c5 | 814 | nr++; |
9d207acc | 815 | } |
5ddf24c5 TH |
816 | |
817 | return nr; | |
818 | } | |
819 | ||
b93ab338 | 820 | void ata_eh_fastdrain_timerfn(struct timer_list *t) |
5ddf24c5 | 821 | { |
b93ab338 | 822 | struct ata_port *ap = from_timer(ap, t, fastdrain_timer); |
5ddf24c5 | 823 | unsigned long flags; |
afae461a | 824 | unsigned int cnt; |
5ddf24c5 TH |
825 | |
826 | spin_lock_irqsave(ap->lock, flags); | |
827 | ||
828 | cnt = ata_eh_nr_in_flight(ap); | |
829 | ||
830 | /* are we done? */ | |
831 | if (!cnt) | |
832 | goto out_unlock; | |
833 | ||
834 | if (cnt == ap->fastdrain_cnt) { | |
258c4e5c | 835 | struct ata_queued_cmd *qc; |
5ddf24c5 TH |
836 | unsigned int tag; |
837 | ||
838 | /* No progress during the last interval, tag all | |
839 | * in-flight qcs as timed out and freeze the port. | |
840 | */ | |
258c4e5c | 841 | ata_qc_for_each(ap, qc, tag) { |
5ddf24c5 TH |
842 | if (qc) |
843 | qc->err_mask |= AC_ERR_TIMEOUT; | |
844 | } | |
845 | ||
846 | ata_port_freeze(ap); | |
847 | } else { | |
848 | /* some qcs have finished, give it another chance */ | |
849 | ap->fastdrain_cnt = cnt; | |
850 | ap->fastdrain_timer.expires = | |
341c2c95 | 851 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
852 | add_timer(&ap->fastdrain_timer); |
853 | } | |
854 | ||
855 | out_unlock: | |
856 | spin_unlock_irqrestore(ap->lock, flags); | |
857 | } | |
858 | ||
859 | /** | |
860 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
861 | * @ap: target ATA port | |
862 | * @fastdrain: activate fast drain | |
863 | * | |
864 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
865 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
866 | * that EH kicks in in timely manner. | |
867 | * | |
868 | * LOCKING: | |
869 | * spin_lock_irqsave(host lock) | |
870 | */ | |
871 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
872 | { | |
afae461a | 873 | unsigned int cnt; |
5ddf24c5 TH |
874 | |
875 | /* already scheduled? */ | |
876 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
877 | return; | |
878 | ||
879 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
880 | ||
881 | if (!fastdrain) | |
882 | return; | |
883 | ||
884 | /* do we have in-flight qcs? */ | |
885 | cnt = ata_eh_nr_in_flight(ap); | |
886 | if (!cnt) | |
887 | return; | |
888 | ||
889 | /* activate fast drain */ | |
890 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
891 | ap->fastdrain_timer.expires = |
892 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
893 | add_timer(&ap->fastdrain_timer); |
894 | } | |
895 | ||
f686bcb8 TH |
896 | /** |
897 | * ata_qc_schedule_eh - schedule qc for error handling | |
898 | * @qc: command to schedule error handling for | |
899 | * | |
900 | * Schedule error handling for @qc. EH will kick in as soon as | |
901 | * other commands are drained. | |
902 | * | |
903 | * LOCKING: | |
cca3974e | 904 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
905 | */ |
906 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
907 | { | |
908 | struct ata_port *ap = qc->ap; | |
909 | ||
910 | WARN_ON(!ap->ops->error_handler); | |
911 | ||
912 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 913 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
914 | |
915 | /* The following will fail if timeout has already expired. | |
916 | * ata_scsi_error() takes care of such scmds on EH entry. | |
917 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
918 | * this function completes. | |
919 | */ | |
c8329cd5 | 920 | blk_abort_request(scsi_cmd_to_rq(qc->scsicmd)); |
f686bcb8 TH |
921 | } |
922 | ||
7b70fc03 | 923 | /** |
e4a9c373 DW |
924 | * ata_std_sched_eh - non-libsas ata_ports issue eh with this common routine |
925 | * @ap: ATA port to schedule EH for | |
7b70fc03 | 926 | * |
e4a9c373 | 927 | * LOCKING: inherited from ata_port_schedule_eh |
cca3974e | 928 | * spin_lock_irqsave(host lock) |
7b70fc03 | 929 | */ |
e4a9c373 | 930 | void ata_std_sched_eh(struct ata_port *ap) |
7b70fc03 TH |
931 | { |
932 | WARN_ON(!ap->ops->error_handler); | |
933 | ||
f4d6d004 TH |
934 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
935 | return; | |
936 | ||
5ddf24c5 | 937 | ata_eh_set_pending(ap, 1); |
cca3974e | 938 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 | 939 | |
c318458c | 940 | trace_ata_std_sched_eh(ap); |
7b70fc03 | 941 | } |
e4a9c373 DW |
942 | EXPORT_SYMBOL_GPL(ata_std_sched_eh); |
943 | ||
944 | /** | |
945 | * ata_std_end_eh - non-libsas ata_ports complete eh with this common routine | |
946 | * @ap: ATA port to end EH for | |
947 | * | |
948 | * In the libata object model there is a 1:1 mapping of ata_port to | |
949 | * shost, so host fields can be directly manipulated under ap->lock, in | |
950 | * the libsas case we need to hold a lock at the ha->level to coordinate | |
951 | * these events. | |
952 | * | |
953 | * LOCKING: | |
954 | * spin_lock_irqsave(host lock) | |
955 | */ | |
956 | void ata_std_end_eh(struct ata_port *ap) | |
957 | { | |
958 | struct Scsi_Host *host = ap->scsi_host; | |
959 | ||
960 | host->host_eh_scheduled = 0; | |
961 | } | |
962 | EXPORT_SYMBOL(ata_std_end_eh); | |
963 | ||
964 | ||
965 | /** | |
966 | * ata_port_schedule_eh - schedule error handling without a qc | |
967 | * @ap: ATA port to schedule EH for | |
968 | * | |
969 | * Schedule error handling for @ap. EH will kick in as soon as | |
970 | * all commands are drained. | |
971 | * | |
972 | * LOCKING: | |
973 | * spin_lock_irqsave(host lock) | |
974 | */ | |
975 | void ata_port_schedule_eh(struct ata_port *ap) | |
976 | { | |
977 | /* see: ata_std_sched_eh, unless you know better */ | |
978 | ap->ops->sched_eh(ap); | |
979 | } | |
a52fbcfc | 980 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
7b70fc03 | 981 | |
dbd82616 | 982 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 | 983 | { |
258c4e5c | 984 | struct ata_queued_cmd *qc; |
7b70fc03 TH |
985 | int tag, nr_aborted = 0; |
986 | ||
987 | WARN_ON(!ap->ops->error_handler); | |
988 | ||
5ddf24c5 TH |
989 | /* we're gonna abort all commands, no need for fast drain */ |
990 | ata_eh_set_pending(ap, 0); | |
991 | ||
28361c40 | 992 | /* include internal tag in iteration */ |
258c4e5c | 993 | ata_qc_for_each_with_internal(ap, qc, tag) { |
dbd82616 | 994 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
995 | qc->flags |= ATA_QCFLAG_FAILED; |
996 | ata_qc_complete(qc); | |
997 | nr_aborted++; | |
998 | } | |
999 | } | |
1000 | ||
1001 | if (!nr_aborted) | |
1002 | ata_port_schedule_eh(ap); | |
1003 | ||
1004 | return nr_aborted; | |
1005 | } | |
1006 | ||
dbd82616 TH |
1007 | /** |
1008 | * ata_link_abort - abort all qc's on the link | |
1009 | * @link: ATA link to abort qc's for | |
1010 | * | |
1011 | * Abort all active qc's active on @link and schedule EH. | |
1012 | * | |
1013 | * LOCKING: | |
1014 | * spin_lock_irqsave(host lock) | |
1015 | * | |
1016 | * RETURNS: | |
1017 | * Number of aborted qc's. | |
1018 | */ | |
1019 | int ata_link_abort(struct ata_link *link) | |
1020 | { | |
1021 | return ata_do_link_abort(link->ap, link); | |
1022 | } | |
a52fbcfc | 1023 | EXPORT_SYMBOL_GPL(ata_link_abort); |
dbd82616 TH |
1024 | |
1025 | /** | |
1026 | * ata_port_abort - abort all qc's on the port | |
1027 | * @ap: ATA port to abort qc's for | |
1028 | * | |
1029 | * Abort all active qc's of @ap and schedule EH. | |
1030 | * | |
1031 | * LOCKING: | |
1032 | * spin_lock_irqsave(host_set lock) | |
1033 | * | |
1034 | * RETURNS: | |
1035 | * Number of aborted qc's. | |
1036 | */ | |
1037 | int ata_port_abort(struct ata_port *ap) | |
1038 | { | |
1039 | return ata_do_link_abort(ap, NULL); | |
1040 | } | |
a52fbcfc | 1041 | EXPORT_SYMBOL_GPL(ata_port_abort); |
dbd82616 | 1042 | |
e3180499 TH |
1043 | /** |
1044 | * __ata_port_freeze - freeze port | |
1045 | * @ap: ATA port to freeze | |
1046 | * | |
1047 | * This function is called when HSM violation or some other | |
1048 | * condition disrupts normal operation of the port. Frozen port | |
1049 | * is not allowed to perform any operation until the port is | |
1050 | * thawed, which usually follows a successful reset. | |
1051 | * | |
1052 | * ap->ops->freeze() callback can be used for freezing the port | |
1053 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
1054 | * port cannot be frozen hardware-wise, the interrupt handler | |
1055 | * must ack and clear interrupts unconditionally while the port | |
1056 | * is frozen. | |
1057 | * | |
1058 | * LOCKING: | |
cca3974e | 1059 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1060 | */ |
1061 | static void __ata_port_freeze(struct ata_port *ap) | |
1062 | { | |
1063 | WARN_ON(!ap->ops->error_handler); | |
1064 | ||
1065 | if (ap->ops->freeze) | |
1066 | ap->ops->freeze(ap); | |
1067 | ||
b51e9e5d | 1068 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 1069 | |
c318458c | 1070 | trace_ata_port_freeze(ap); |
e3180499 TH |
1071 | } |
1072 | ||
1073 | /** | |
1074 | * ata_port_freeze - abort & freeze port | |
1075 | * @ap: ATA port to freeze | |
1076 | * | |
54c38444 JG |
1077 | * Abort and freeze @ap. The freeze operation must be called |
1078 | * first, because some hardware requires special operations | |
1079 | * before the taskfile registers are accessible. | |
e3180499 TH |
1080 | * |
1081 | * LOCKING: | |
cca3974e | 1082 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1083 | * |
1084 | * RETURNS: | |
1085 | * Number of aborted commands. | |
1086 | */ | |
1087 | int ata_port_freeze(struct ata_port *ap) | |
1088 | { | |
1089 | int nr_aborted; | |
1090 | ||
1091 | WARN_ON(!ap->ops->error_handler); | |
1092 | ||
e3180499 | 1093 | __ata_port_freeze(ap); |
54c38444 | 1094 | nr_aborted = ata_port_abort(ap); |
e3180499 TH |
1095 | |
1096 | return nr_aborted; | |
1097 | } | |
a52fbcfc | 1098 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
e3180499 TH |
1099 | |
1100 | /** | |
1101 | * ata_eh_freeze_port - EH helper to freeze port | |
1102 | * @ap: ATA port to freeze | |
1103 | * | |
1104 | * Freeze @ap. | |
1105 | * | |
1106 | * LOCKING: | |
1107 | * None. | |
1108 | */ | |
1109 | void ata_eh_freeze_port(struct ata_port *ap) | |
1110 | { | |
1111 | unsigned long flags; | |
1112 | ||
1113 | if (!ap->ops->error_handler) | |
1114 | return; | |
1115 | ||
ba6a1308 | 1116 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1117 | __ata_port_freeze(ap); |
ba6a1308 | 1118 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1119 | } |
a52fbcfc | 1120 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
e3180499 TH |
1121 | |
1122 | /** | |
94bd5719 | 1123 | * ata_eh_thaw_port - EH helper to thaw port |
e3180499 TH |
1124 | * @ap: ATA port to thaw |
1125 | * | |
1126 | * Thaw frozen port @ap. | |
1127 | * | |
1128 | * LOCKING: | |
1129 | * None. | |
1130 | */ | |
1131 | void ata_eh_thaw_port(struct ata_port *ap) | |
1132 | { | |
1133 | unsigned long flags; | |
1134 | ||
1135 | if (!ap->ops->error_handler) | |
1136 | return; | |
1137 | ||
ba6a1308 | 1138 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1139 | |
b51e9e5d | 1140 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1141 | |
1142 | if (ap->ops->thaw) | |
1143 | ap->ops->thaw(ap); | |
1144 | ||
ba6a1308 | 1145 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1146 | |
c318458c | 1147 | trace_ata_port_thaw(ap); |
e3180499 TH |
1148 | } |
1149 | ||
ece1d636 TH |
1150 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1151 | { | |
1152 | /* nada */ | |
1153 | } | |
1154 | ||
1155 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1156 | { | |
1157 | struct ata_port *ap = qc->ap; | |
1158 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1159 | unsigned long flags; | |
1160 | ||
ba6a1308 | 1161 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1162 | qc->scsidone = ata_eh_scsidone; |
1163 | __ata_qc_complete(qc); | |
1164 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1165 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1166 | |
1167 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1168 | } | |
1169 | ||
1170 | /** | |
1171 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1172 | * @qc: Command to complete | |
1173 | * | |
1174 | * Indicate to the mid and upper layers that an ATA command has | |
1175 | * completed. To be used from EH. | |
1176 | */ | |
1177 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1178 | { | |
1179 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1180 | scmd->retries = scmd->allowed; | |
1181 | __ata_eh_qc_complete(qc); | |
1182 | } | |
1183 | ||
1184 | /** | |
1185 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1186 | * @qc: Command to retry | |
1187 | * | |
1188 | * Indicate to the mid and upper layers that an ATA command | |
1189 | * should be retried. To be used from EH. | |
1190 | * | |
1191 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
f13e2201 | 1192 | * scmd->allowed is incremented for commands which get retried |
ece1d636 TH |
1193 | * due to unrelated failures (qc->err_mask is zero). |
1194 | */ | |
1195 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1196 | { | |
1197 | struct scsi_cmnd *scmd = qc->scsicmd; | |
f13e2201 GG |
1198 | if (!qc->err_mask) |
1199 | scmd->allowed++; | |
ece1d636 TH |
1200 | __ata_eh_qc_complete(qc); |
1201 | } | |
022bdb07 | 1202 | |
678afac6 TH |
1203 | /** |
1204 | * ata_dev_disable - disable ATA device | |
1205 | * @dev: ATA device to disable | |
1206 | * | |
1207 | * Disable @dev. | |
1208 | * | |
1209 | * Locking: | |
1210 | * EH context. | |
1211 | */ | |
1212 | void ata_dev_disable(struct ata_device *dev) | |
1213 | { | |
1214 | if (!ata_dev_enabled(dev)) | |
1215 | return; | |
1216 | ||
1c95a27c | 1217 | ata_dev_warn(dev, "disable device\n"); |
678afac6 TH |
1218 | ata_acpi_on_disable(dev); |
1219 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1220 | dev->class++; | |
99cf610a TH |
1221 | |
1222 | /* From now till the next successful probe, ering is used to | |
1223 | * track probe failures. Clear accumulated device error info. | |
1224 | */ | |
1225 | ata_ering_clear(&dev->ering); | |
678afac6 | 1226 | } |
a52fbcfc | 1227 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
678afac6 | 1228 | |
0ea035a3 TH |
1229 | /** |
1230 | * ata_eh_detach_dev - detach ATA device | |
1231 | * @dev: ATA device to detach | |
1232 | * | |
1233 | * Detach @dev. | |
1234 | * | |
1235 | * LOCKING: | |
1236 | * None. | |
1237 | */ | |
fb7fd614 | 1238 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1239 | { |
f58229f8 TH |
1240 | struct ata_link *link = dev->link; |
1241 | struct ata_port *ap = link->ap; | |
90484ebf | 1242 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1243 | unsigned long flags; |
1244 | ||
1245 | ata_dev_disable(dev); | |
1246 | ||
ba6a1308 | 1247 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1248 | |
1249 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1250 | ||
1251 | if (ata_scsi_offline_dev(dev)) { | |
1252 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1253 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1254 | } |
1255 | ||
90484ebf | 1256 | /* clear per-dev EH info */ |
f58229f8 TH |
1257 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1258 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1259 | ehc->saved_xfer_mode[dev->devno] = 0; |
1260 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1261 | |
ba6a1308 | 1262 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1263 | } |
1264 | ||
022bdb07 TH |
1265 | /** |
1266 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1267 | * @link: target ATA link |
47005f25 | 1268 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1269 | * @action: action about to be performed |
1270 | * | |
1271 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1272 | * in @link->eh_info such that eh actions are not unnecessarily |
1273 | * repeated. | |
022bdb07 TH |
1274 | * |
1275 | * LOCKING: | |
1276 | * None. | |
1277 | */ | |
fb7fd614 TH |
1278 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1279 | unsigned int action) | |
022bdb07 | 1280 | { |
955e57df TH |
1281 | struct ata_port *ap = link->ap; |
1282 | struct ata_eh_info *ehi = &link->eh_info; | |
1283 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1284 | unsigned long flags; |
1285 | ||
c318458c HR |
1286 | trace_ata_eh_about_to_do(link, dev ? dev->devno : 0, action); |
1287 | ||
ba6a1308 | 1288 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1289 | |
955e57df | 1290 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1291 | |
a568d1d2 TH |
1292 | /* About to take EH action, set RECOVERED. Ignore actions on |
1293 | * slave links as master will do them again. | |
1294 | */ | |
1295 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1296 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1297 | ||
ba6a1308 | 1298 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1299 | } |
1300 | ||
47005f25 TH |
1301 | /** |
1302 | * ata_eh_done - EH action complete | |
2f60e1ab | 1303 | * @link: ATA link for which EH actions are complete |
47005f25 TH |
1304 | * @dev: target ATA dev for per-dev action (can be NULL) |
1305 | * @action: action just completed | |
1306 | * | |
1307 | * Called right after performing EH actions to clear related bits | |
955e57df | 1308 | * in @link->eh_context. |
47005f25 TH |
1309 | * |
1310 | * LOCKING: | |
1311 | * None. | |
1312 | */ | |
fb7fd614 TH |
1313 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1314 | unsigned int action) | |
47005f25 | 1315 | { |
955e57df | 1316 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1317 | |
c318458c HR |
1318 | trace_ata_eh_done(link, dev ? dev->devno : 0, action); |
1319 | ||
955e57df | 1320 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1321 | } |
1322 | ||
022bdb07 TH |
1323 | /** |
1324 | * ata_err_string - convert err_mask to descriptive string | |
1325 | * @err_mask: error mask to convert to string | |
1326 | * | |
1327 | * Convert @err_mask to descriptive string. Errors are | |
1328 | * prioritized according to severity and only the most severe | |
1329 | * error is reported. | |
1330 | * | |
1331 | * LOCKING: | |
1332 | * None. | |
1333 | * | |
1334 | * RETURNS: | |
1335 | * Descriptive string for @err_mask | |
1336 | */ | |
2dcb407e | 1337 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1338 | { |
1339 | if (err_mask & AC_ERR_HOST_BUS) | |
1340 | return "host bus error"; | |
1341 | if (err_mask & AC_ERR_ATA_BUS) | |
1342 | return "ATA bus error"; | |
1343 | if (err_mask & AC_ERR_TIMEOUT) | |
1344 | return "timeout"; | |
1345 | if (err_mask & AC_ERR_HSM) | |
1346 | return "HSM violation"; | |
1347 | if (err_mask & AC_ERR_SYSTEM) | |
1348 | return "internal error"; | |
1349 | if (err_mask & AC_ERR_MEDIA) | |
1350 | return "media error"; | |
1351 | if (err_mask & AC_ERR_INVALID) | |
1352 | return "invalid argument"; | |
1353 | if (err_mask & AC_ERR_DEV) | |
1354 | return "device error"; | |
54fb131b DLM |
1355 | if (err_mask & AC_ERR_NCQ) |
1356 | return "NCQ error"; | |
1357 | if (err_mask & AC_ERR_NODEV_HINT) | |
1358 | return "Polling detection error"; | |
022bdb07 TH |
1359 | return "unknown error"; |
1360 | } | |
1361 | ||
11fc33da TH |
1362 | /** |
1363 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1364 | * @dev: target ATAPI device | |
1365 | * @r_sense_key: out parameter for sense_key | |
1366 | * | |
1367 | * Perform ATAPI TEST_UNIT_READY. | |
1368 | * | |
1369 | * LOCKING: | |
1370 | * EH context (may sleep). | |
1371 | * | |
1372 | * RETURNS: | |
1373 | * 0 on success, AC_ERR_* mask on failure. | |
1374 | */ | |
3dc67440 | 1375 | unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) |
11fc33da TH |
1376 | { |
1377 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1378 | struct ata_taskfile tf; | |
1379 | unsigned int err_mask; | |
1380 | ||
1381 | ata_tf_init(dev, &tf); | |
1382 | ||
1383 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1384 | tf.command = ATA_CMD_PACKET; | |
1385 | tf.protocol = ATAPI_PROT_NODATA; | |
1386 | ||
1387 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1388 | if (err_mask == AC_ERR_DEV) | |
efcef265 | 1389 | *r_sense_key = tf.error >> 4; |
11fc33da TH |
1390 | return err_mask; |
1391 | } | |
1392 | ||
e87fd28c HR |
1393 | /** |
1394 | * ata_eh_request_sense - perform REQUEST_SENSE_DATA_EXT | |
2f60e1ab | 1395 | * @qc: qc to perform REQUEST_SENSE_SENSE_DATA_EXT to |
e87fd28c HR |
1396 | * @cmd: scsi command for which the sense code should be set |
1397 | * | |
1398 | * Perform REQUEST_SENSE_DATA_EXT after the device reported CHECK | |
1399 | * SENSE. This function is an EH helper. | |
1400 | * | |
1401 | * LOCKING: | |
1402 | * Kernel thread context (may sleep). | |
1403 | */ | |
1404 | static void ata_eh_request_sense(struct ata_queued_cmd *qc, | |
1405 | struct scsi_cmnd *cmd) | |
1406 | { | |
1407 | struct ata_device *dev = qc->dev; | |
1408 | struct ata_taskfile tf; | |
1409 | unsigned int err_mask; | |
1410 | ||
1411 | if (qc->ap->pflags & ATA_PFLAG_FROZEN) { | |
1412 | ata_dev_warn(dev, "sense data available but port frozen\n"); | |
1413 | return; | |
1414 | } | |
1415 | ||
d238ffd5 | 1416 | if (!cmd || qc->flags & ATA_QCFLAG_SENSE_VALID) |
e87fd28c HR |
1417 | return; |
1418 | ||
1419 | if (!ata_id_sense_reporting_enabled(dev->id)) { | |
1420 | ata_dev_warn(qc->dev, "sense data reporting disabled\n"); | |
1421 | return; | |
1422 | } | |
1423 | ||
e87fd28c HR |
1424 | ata_tf_init(dev, &tf); |
1425 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1426 | tf.flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
1427 | tf.command = ATA_CMD_REQ_SENSE_DATA; | |
1428 | tf.protocol = ATA_PROT_NODATA; | |
1429 | ||
1430 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
1431 | /* Ignore err_mask; ATA_ERR might be set */ | |
efcef265 | 1432 | if (tf.status & ATA_SENSE) { |
06dbde5f | 1433 | ata_scsi_set_sense(dev, cmd, tf.lbah, tf.lbam, tf.lbal); |
e87fd28c HR |
1434 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
1435 | } else { | |
1436 | ata_dev_warn(dev, "request sense failed stat %02x emask %x\n", | |
efcef265 | 1437 | tf.status, err_mask); |
e87fd28c HR |
1438 | } |
1439 | } | |
1440 | ||
022bdb07 TH |
1441 | /** |
1442 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1443 | * @dev: device to perform REQUEST_SENSE to | |
1444 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1445 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1446 | * |
1447 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1448 | * SENSE. This function is EH helper. | |
1449 | * | |
1450 | * LOCKING: | |
1451 | * Kernel thread context (may sleep). | |
1452 | * | |
1453 | * RETURNS: | |
1454 | * 0 on success, AC_ERR_* mask on failure | |
1455 | */ | |
3dc67440 | 1456 | unsigned int atapi_eh_request_sense(struct ata_device *dev, |
3eabddb8 | 1457 | u8 *sense_buf, u8 dfl_sense_key) |
022bdb07 | 1458 | { |
3eabddb8 TH |
1459 | u8 cdb[ATAPI_CDB_LEN] = |
1460 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1461 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1462 | struct ata_taskfile tf; |
022bdb07 | 1463 | |
022bdb07 TH |
1464 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
1465 | ||
56287768 AL |
1466 | /* initialize sense_buf with the error register, |
1467 | * for the case where they are -not- overwritten | |
1468 | */ | |
022bdb07 | 1469 | sense_buf[0] = 0x70; |
3eabddb8 | 1470 | sense_buf[2] = dfl_sense_key; |
56287768 | 1471 | |
a617c09f | 1472 | /* some devices time out if garbage left in tf */ |
56287768 | 1473 | ata_tf_init(dev, &tf); |
022bdb07 | 1474 | |
022bdb07 TH |
1475 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1476 | tf.command = ATA_CMD_PACKET; | |
1477 | ||
1478 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1479 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1480 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1481 | tf.feature |= ATAPI_PKT_DMA; |
1482 | } else { | |
0dc36888 | 1483 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1484 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1485 | tf.lbah = 0; | |
022bdb07 TH |
1486 | } |
1487 | ||
1488 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1489 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1490 | } |
1491 | ||
1492 | /** | |
1493 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1494 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1495 | * |
1496 | * Analyze SError if available and further determine cause of | |
1497 | * failure. | |
1498 | * | |
1499 | * LOCKING: | |
1500 | * None. | |
1501 | */ | |
0260731f | 1502 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1503 | { |
0260731f | 1504 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1505 | u32 serror = ehc->i.serror; |
1506 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1507 | u32 hotplug_mask; |
022bdb07 | 1508 | |
e0614db2 | 1509 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1510 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1511 | action |= ATA_EH_RESET; |
022bdb07 TH |
1512 | } |
1513 | if (serror & SERR_PROTOCOL) { | |
1514 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1515 | action |= ATA_EH_RESET; |
022bdb07 TH |
1516 | } |
1517 | if (serror & SERR_INTERNAL) { | |
1518 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1519 | action |= ATA_EH_RESET; |
022bdb07 | 1520 | } |
f9df58cb TH |
1521 | |
1522 | /* Determine whether a hotplug event has occurred. Both | |
1523 | * SError.N/X are considered hotplug events for enabled or | |
1524 | * host links. For disabled PMP links, only N bit is | |
1525 | * considered as X bit is left at 1 for link plugging. | |
1526 | */ | |
eb0e85e3 | 1527 | if (link->lpm_policy > ATA_LPM_MAX_POWER) |
6b7ae954 TH |
1528 | hotplug_mask = 0; /* hotplug doesn't work w/ LPM */ |
1529 | else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
f9df58cb TH |
1530 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
1531 | else | |
1532 | hotplug_mask = SERR_PHYRDY_CHG; | |
1533 | ||
1534 | if (serror & hotplug_mask) | |
084fe639 | 1535 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1536 | |
1537 | ehc->i.err_mask |= err_mask; | |
1538 | ehc->i.action |= action; | |
1539 | } | |
1540 | ||
1541 | /** | |
1542 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1543 | * @qc: qc to analyze | |
1544 | * @tf: Taskfile registers to analyze | |
1545 | * | |
1546 | * Analyze taskfile of @qc and further determine cause of | |
1547 | * failure. This function also requests ATAPI sense data if | |
25985edc | 1548 | * available. |
022bdb07 TH |
1549 | * |
1550 | * LOCKING: | |
1551 | * Kernel thread context (may sleep). | |
1552 | * | |
1553 | * RETURNS: | |
1554 | * Determined recovery action | |
1555 | */ | |
1556 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1557 | const struct ata_taskfile *tf) | |
1558 | { | |
1559 | unsigned int tmp, action = 0; | |
efcef265 | 1560 | u8 stat = tf->status, err = tf->error; |
022bdb07 TH |
1561 | |
1562 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1563 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1564 | return ATA_EH_RESET; |
022bdb07 TH |
1565 | } |
1566 | ||
e87fd28c | 1567 | if (stat & (ATA_ERR | ATA_DF)) { |
a51d644a | 1568 | qc->err_mask |= AC_ERR_DEV; |
e87fd28c HR |
1569 | /* |
1570 | * Sense data reporting does not work if the | |
1571 | * device fault bit is set. | |
1572 | */ | |
1573 | if (stat & ATA_DF) | |
1574 | stat &= ~ATA_SENSE; | |
1575 | } else { | |
022bdb07 | 1576 | return 0; |
e87fd28c | 1577 | } |
022bdb07 TH |
1578 | |
1579 | switch (qc->dev->class) { | |
9162c657 | 1580 | case ATA_DEV_ZAC: |
e87fd28c HR |
1581 | if (stat & ATA_SENSE) |
1582 | ata_eh_request_sense(qc, qc->scsicmd); | |
df561f66 | 1583 | fallthrough; |
ca156e00 | 1584 | case ATA_DEV_ATA: |
022bdb07 TH |
1585 | if (err & ATA_ICRC) |
1586 | qc->err_mask |= AC_ERR_ATA_BUS; | |
eec7e1c1 | 1587 | if (err & (ATA_UNC | ATA_AMNF)) |
022bdb07 TH |
1588 | qc->err_mask |= AC_ERR_MEDIA; |
1589 | if (err & ATA_IDNF) | |
1590 | qc->err_mask |= AC_ERR_INVALID; | |
1591 | break; | |
1592 | ||
1593 | case ATA_DEV_ATAPI: | |
a569a30d | 1594 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1595 | tmp = atapi_eh_request_sense(qc->dev, |
1596 | qc->scsicmd->sense_buffer, | |
efcef265 | 1597 | qc->result_tf.error >> 4); |
3852e373 | 1598 | if (!tmp) |
a569a30d | 1599 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
3852e373 | 1600 | else |
a569a30d TH |
1601 | qc->err_mask |= tmp; |
1602 | } | |
022bdb07 TH |
1603 | } |
1604 | ||
3852e373 | 1605 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { |
b8e162f9 | 1606 | enum scsi_disposition ret = scsi_check_sense(qc->scsicmd); |
3852e373 | 1607 | /* |
79487259 | 1608 | * SUCCESS here means that the sense code could be |
3852e373 HR |
1609 | * evaluated and should be passed to the upper layers |
1610 | * for correct evaluation. | |
79487259 | 1611 | * FAILED means the sense code could not be interpreted |
3852e373 HR |
1612 | * and the device would need to be reset. |
1613 | * NEEDS_RETRY and ADD_TO_MLQUEUE means that the | |
1614 | * command would need to be retried. | |
1615 | */ | |
1616 | if (ret == NEEDS_RETRY || ret == ADD_TO_MLQUEUE) { | |
1617 | qc->flags |= ATA_QCFLAG_RETRY; | |
1618 | qc->err_mask |= AC_ERR_OTHER; | |
1619 | } else if (ret != SUCCESS) { | |
1620 | qc->err_mask |= AC_ERR_HSM; | |
1621 | } | |
1622 | } | |
022bdb07 | 1623 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) |
cf480626 | 1624 | action |= ATA_EH_RESET; |
022bdb07 TH |
1625 | |
1626 | return action; | |
1627 | } | |
1628 | ||
76326ac1 TH |
1629 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1630 | int *xfer_ok) | |
022bdb07 | 1631 | { |
76326ac1 TH |
1632 | int base = 0; |
1633 | ||
1634 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1635 | *xfer_ok = 1; | |
1636 | ||
1637 | if (!*xfer_ok) | |
75f9cafc | 1638 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1639 | |
7d47e8d4 | 1640 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1641 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1642 | |
7d47e8d4 | 1643 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1644 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1645 | |
3884f7b0 | 1646 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1647 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1648 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1649 | if ((err_mask & |
1650 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1651 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1652 | } |
1653 | ||
1654 | return 0; | |
1655 | } | |
1656 | ||
7d47e8d4 | 1657 | struct speed_down_verdict_arg { |
022bdb07 | 1658 | u64 since; |
76326ac1 | 1659 | int xfer_ok; |
3884f7b0 | 1660 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1661 | }; |
1662 | ||
7d47e8d4 | 1663 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1664 | { |
7d47e8d4 | 1665 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1666 | int cat; |
022bdb07 | 1667 | |
d9027470 | 1668 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since)) |
022bdb07 TH |
1669 | return -1; |
1670 | ||
76326ac1 TH |
1671 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1672 | &arg->xfer_ok); | |
7d47e8d4 | 1673 | arg->nr_errors[cat]++; |
76326ac1 | 1674 | |
022bdb07 TH |
1675 | return 0; |
1676 | } | |
1677 | ||
1678 | /** | |
7d47e8d4 | 1679 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1680 | * @dev: Device of interest |
1681 | * | |
1682 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1683 | * whether NCQ needs to be turned off, transfer speed should be |
1684 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1685 | * |
3884f7b0 TH |
1686 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1687 | * | |
1688 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1689 | * IO commands | |
1690 | * | |
1691 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1692 | * | |
76326ac1 TH |
1693 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1694 | * data transfer hasn't been verified. | |
1695 | * | |
3884f7b0 TH |
1696 | * Verdicts are |
1697 | * | |
1698 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1699 | * |
3884f7b0 TH |
1700 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1701 | * to PIO. | |
7d47e8d4 | 1702 | * |
3884f7b0 | 1703 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1704 | * |
3884f7b0 | 1705 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1706 | * taken per error. An action triggered by non-DUBIOUS errors |
1707 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1708 | * This is to expedite speed down decisions right after device is | |
1709 | * initially configured. | |
1710 | * | |
4091fb95 | 1711 | * The following are speed down rules. #1 and #2 deal with |
76326ac1 | 1712 | * DUBIOUS errors. |
7d47e8d4 | 1713 | * |
76326ac1 TH |
1714 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1715 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1716 | * | |
1717 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1718 | * occurred during last 5 mins, NCQ_OFF. | |
1719 | * | |
1720 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
25985edc | 1721 | * occurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1722 | * |
76326ac1 | 1723 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1724 | * during last 10 mins, NCQ_OFF. |
1725 | * | |
76326ac1 | 1726 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1727 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1728 | * |
022bdb07 TH |
1729 | * LOCKING: |
1730 | * Inherited from caller. | |
1731 | * | |
1732 | * RETURNS: | |
7d47e8d4 | 1733 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1734 | */ |
7d47e8d4 | 1735 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1736 | { |
7d47e8d4 TH |
1737 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1738 | u64 j64 = get_jiffies_64(); | |
1739 | struct speed_down_verdict_arg arg; | |
1740 | unsigned int verdict = 0; | |
022bdb07 | 1741 | |
3884f7b0 | 1742 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1743 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1744 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1745 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1746 | |
76326ac1 TH |
1747 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1748 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1749 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1750 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1751 | ||
1752 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1753 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1754 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1755 | ||
3884f7b0 TH |
1756 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1757 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1758 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1759 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1760 | |
3884f7b0 | 1761 | /* scan past 10 mins of error history */ |
022bdb07 | 1762 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1763 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1764 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1765 | |
3884f7b0 TH |
1766 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1767 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1768 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1769 | ||
1770 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1771 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1772 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1773 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1774 | |
7d47e8d4 | 1775 | return verdict; |
022bdb07 TH |
1776 | } |
1777 | ||
1778 | /** | |
1779 | * ata_eh_speed_down - record error and speed down if necessary | |
1780 | * @dev: Failed device | |
3884f7b0 | 1781 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1782 | * @err_mask: err_mask of the error |
1783 | * | |
1784 | * Record error and examine error history to determine whether | |
1785 | * adjusting transmission speed is necessary. It also sets | |
1786 | * transmission limits appropriately if such adjustment is | |
1787 | * necessary. | |
1788 | * | |
1789 | * LOCKING: | |
1790 | * Kernel thread context (may sleep). | |
1791 | * | |
1792 | * RETURNS: | |
7d47e8d4 | 1793 | * Determined recovery action. |
022bdb07 | 1794 | */ |
3884f7b0 TH |
1795 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1796 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1797 | { |
b1c72916 | 1798 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 1799 | int xfer_ok = 0; |
7d47e8d4 TH |
1800 | unsigned int verdict; |
1801 | unsigned int action = 0; | |
1802 | ||
1803 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1804 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1805 | return 0; |
1806 | ||
1807 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1808 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1809 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1810 | |
7d47e8d4 TH |
1811 | /* turn off NCQ? */ |
1812 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1813 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1814 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1815 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
a9a79dfe | 1816 | ata_dev_warn(dev, "NCQ disabled due to excessive errors\n"); |
7d47e8d4 TH |
1817 | goto done; |
1818 | } | |
022bdb07 | 1819 | |
7d47e8d4 TH |
1820 | /* speed down? */ |
1821 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1822 | /* speed down SATA link speed if possible */ | |
a07d499b | 1823 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 1824 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1825 | goto done; |
1826 | } | |
022bdb07 | 1827 | |
7d47e8d4 TH |
1828 | /* lower transfer mode */ |
1829 | if (dev->spdn_cnt < 2) { | |
1830 | static const int dma_dnxfer_sel[] = | |
1831 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1832 | static const int pio_dnxfer_sel[] = | |
1833 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1834 | int sel; | |
1835 | ||
1836 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1837 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1838 | else | |
1839 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1840 | ||
1841 | dev->spdn_cnt++; | |
1842 | ||
1843 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1844 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1845 | goto done; |
1846 | } | |
1847 | } | |
1848 | } | |
1849 | ||
1850 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1851 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1852 | */ |
1853 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1854 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1855 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1856 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1857 | dev->spdn_cnt = 0; | |
cf480626 | 1858 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1859 | goto done; |
1860 | } | |
1861 | } | |
022bdb07 | 1862 | |
022bdb07 | 1863 | return 0; |
7d47e8d4 TH |
1864 | done: |
1865 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1866 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1867 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1868 | return action; |
022bdb07 TH |
1869 | } |
1870 | ||
8d899e70 ML |
1871 | /** |
1872 | * ata_eh_worth_retry - analyze error and decide whether to retry | |
1873 | * @qc: qc to possibly retry | |
1874 | * | |
1875 | * Look at the cause of the error and decide if a retry | |
1876 | * might be useful or not. We don't want to retry media errors | |
1877 | * because the drive itself has probably already taken 10-30 seconds | |
1878 | * doing its own internal retries before reporting the failure. | |
1879 | */ | |
1880 | static inline int ata_eh_worth_retry(struct ata_queued_cmd *qc) | |
1881 | { | |
1eaca39a | 1882 | if (qc->err_mask & AC_ERR_MEDIA) |
8d899e70 ML |
1883 | return 0; /* don't retry media errors */ |
1884 | if (qc->flags & ATA_QCFLAG_IO) | |
1885 | return 1; /* otherwise retry anything from fs stack */ | |
1886 | if (qc->err_mask & AC_ERR_INVALID) | |
1887 | return 0; /* don't retry these */ | |
1888 | return qc->err_mask != AC_ERR_DEV; /* retry if not dev error */ | |
1889 | } | |
1890 | ||
7eb49509 DLM |
1891 | /** |
1892 | * ata_eh_quiet - check if we need to be quiet about a command error | |
1893 | * @qc: qc to check | |
1894 | * | |
1895 | * Look at the qc flags anbd its scsi command request flags to determine | |
1896 | * if we need to be quiet about the command failure. | |
1897 | */ | |
1898 | static inline bool ata_eh_quiet(struct ata_queued_cmd *qc) | |
1899 | { | |
c8329cd5 | 1900 | if (qc->scsicmd && scsi_cmd_to_rq(qc->scsicmd)->rq_flags & RQF_QUIET) |
7eb49509 DLM |
1901 | qc->flags |= ATA_QCFLAG_QUIET; |
1902 | return qc->flags & ATA_QCFLAG_QUIET; | |
1903 | } | |
1904 | ||
022bdb07 | 1905 | /** |
9b1e2658 TH |
1906 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1907 | * @link: host link to perform autopsy on | |
022bdb07 | 1908 | * |
0260731f TH |
1909 | * Analyze why @link failed and determine which recovery actions |
1910 | * are needed. This function also sets more detailed AC_ERR_* | |
1911 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1912 | * |
1913 | * LOCKING: | |
1914 | * Kernel thread context (may sleep). | |
1915 | */ | |
9b1e2658 | 1916 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1917 | { |
0260731f | 1918 | struct ata_port *ap = link->ap; |
936fd732 | 1919 | struct ata_eh_context *ehc = &link->eh_context; |
258c4e5c | 1920 | struct ata_queued_cmd *qc; |
dfcc173d | 1921 | struct ata_device *dev; |
3884f7b0 | 1922 | unsigned int all_err_mask = 0, eflags = 0; |
7eb49509 | 1923 | int tag, nr_failed = 0, nr_quiet = 0; |
022bdb07 TH |
1924 | u32 serror; |
1925 | int rc; | |
1926 | ||
1cdaf534 TH |
1927 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1928 | return; | |
1929 | ||
022bdb07 | 1930 | /* obtain and analyze SError */ |
936fd732 | 1931 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1932 | if (rc == 0) { |
1933 | ehc->i.serror |= serror; | |
0260731f | 1934 | ata_eh_analyze_serror(link); |
4e57c517 | 1935 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 1936 | /* SError read failed, force reset and probing */ |
b558eddd | 1937 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 1938 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
1939 | ehc->i.err_mask |= AC_ERR_OTHER; |
1940 | } | |
022bdb07 | 1941 | |
e8ee8451 | 1942 | /* analyze NCQ failure */ |
0260731f | 1943 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 1944 | |
022bdb07 TH |
1945 | /* any real error trumps AC_ERR_OTHER */ |
1946 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
1947 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
1948 | ||
1949 | all_err_mask |= ehc->i.err_mask; | |
1950 | ||
258c4e5c | 1951 | ata_qc_for_each_raw(ap, qc, tag) { |
b1c72916 TH |
1952 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
1953 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
1954 | continue; |
1955 | ||
1956 | /* inherit upper level err_mask */ | |
1957 | qc->err_mask |= ehc->i.err_mask; | |
1958 | ||
022bdb07 | 1959 | /* analyze TF */ |
4528e4da | 1960 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
1961 | |
1962 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
1963 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
1964 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
1965 | AC_ERR_INVALID); | |
1966 | ||
1967 | /* any real error trumps unknown error */ | |
1968 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1969 | qc->err_mask &= ~AC_ERR_OTHER; | |
1970 | ||
804689ad DLM |
1971 | /* |
1972 | * SENSE_VALID trumps dev/unknown error and revalidation. Upper | |
1973 | * layers will determine whether the command is worth retrying | |
1974 | * based on the sense data and device class/type. Otherwise, | |
1975 | * determine directly if the command is worth retrying using its | |
1976 | * error mask and flags. | |
1977 | */ | |
f90f0828 | 1978 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 1979 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
804689ad | 1980 | else if (ata_eh_worth_retry(qc)) |
03faab78 TH |
1981 | qc->flags |= ATA_QCFLAG_RETRY; |
1982 | ||
022bdb07 | 1983 | /* accumulate error info */ |
4528e4da | 1984 | ehc->i.dev = qc->dev; |
022bdb07 TH |
1985 | all_err_mask |= qc->err_mask; |
1986 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 1987 | eflags |= ATA_EFLAG_IS_IO; |
255c03d1 | 1988 | trace_ata_eh_link_autopsy_qc(qc); |
7eb49509 DLM |
1989 | |
1990 | /* Count quiet errors */ | |
1991 | if (ata_eh_quiet(qc)) | |
1992 | nr_quiet++; | |
1993 | nr_failed++; | |
022bdb07 TH |
1994 | } |
1995 | ||
7eb49509 DLM |
1996 | /* If all failed commands requested silence, then be quiet */ |
1997 | if (nr_quiet == nr_failed) | |
1998 | ehc->i.flags |= ATA_EHI_QUIET; | |
1999 | ||
a20f33ff | 2000 | /* enforce default EH actions */ |
b51e9e5d | 2001 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 2002 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2003 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2004 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2005 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2006 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2007 | |
dfcc173d TH |
2008 | /* If we have offending qcs and the associated failed device, |
2009 | * perform per-dev EH action only on the offending device. | |
2010 | */ | |
4528e4da | 2011 | if (ehc->i.dev) { |
4528e4da TH |
2012 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2013 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2014 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2015 | } |
2016 | ||
2695e366 TH |
2017 | /* propagate timeout to host link */ |
2018 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2019 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2020 | ||
2021 | /* record error and consider speeding down */ | |
dfcc173d | 2022 | dev = ehc->i.dev; |
2695e366 TH |
2023 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2024 | ata_dev_enabled(link->device)))) | |
2025 | dev = link->device; | |
dfcc173d | 2026 | |
76326ac1 TH |
2027 | if (dev) { |
2028 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2029 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2030 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
f1601113 | 2031 | trace_ata_eh_link_autopsy(dev, ehc->i.action, all_err_mask); |
76326ac1 | 2032 | } |
022bdb07 TH |
2033 | } |
2034 | ||
2035 | /** | |
9b1e2658 TH |
2036 | * ata_eh_autopsy - analyze error and determine recovery action |
2037 | * @ap: host port to perform autopsy on | |
2038 | * | |
2039 | * Analyze all links of @ap and determine why they failed and | |
2040 | * which recovery actions are needed. | |
2041 | * | |
2042 | * LOCKING: | |
2043 | * Kernel thread context (may sleep). | |
2044 | */ | |
fb7fd614 | 2045 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2046 | { |
2047 | struct ata_link *link; | |
2048 | ||
1eca4365 | 2049 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2050 | ata_eh_link_autopsy(link); |
2695e366 | 2051 | |
b1c72916 TH |
2052 | /* Handle the frigging slave link. Autopsy is done similarly |
2053 | * but actions and flags are transferred over to the master | |
2054 | * link and handled from there. | |
2055 | */ | |
2056 | if (ap->slave_link) { | |
2057 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2058 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2059 | ||
848e4c68 TH |
2060 | /* transfer control flags from master to slave */ |
2061 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2062 | ||
2063 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2064 | ata_eh_link_autopsy(ap->slave_link); |
2065 | ||
848e4c68 | 2066 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2067 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2068 | mehc->i.action |= sehc->i.action; | |
2069 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2070 | mehc->i.flags |= sehc->i.flags; | |
2071 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2072 | } | |
2073 | ||
2695e366 TH |
2074 | /* Autopsy of fanout ports can affect host link autopsy. |
2075 | * Perform host link autopsy last. | |
2076 | */ | |
071f44b1 | 2077 | if (sata_pmp_attached(ap)) |
2695e366 | 2078 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2079 | } |
2080 | ||
6521148c | 2081 | /** |
d4520903 HR |
2082 | * ata_get_cmd_name - get name for ATA command |
2083 | * @command: ATA command code to get name for | |
6521148c | 2084 | * |
d4520903 | 2085 | * Return a textual name of the given command or "unknown" |
6521148c RH |
2086 | * |
2087 | * LOCKING: | |
2088 | * None | |
2089 | */ | |
d4520903 | 2090 | const char *ata_get_cmd_name(u8 command) |
6521148c RH |
2091 | { |
2092 | #ifdef CONFIG_ATA_VERBOSE_ERROR | |
2093 | static const struct | |
2094 | { | |
2095 | u8 command; | |
2096 | const char *text; | |
2097 | } cmd_descr[] = { | |
2098 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, | |
825e2d87 HR |
2099 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, |
2100 | { ATA_CMD_STANDBY, "STANDBY" }, | |
2101 | { ATA_CMD_IDLE, "IDLE" }, | |
2102 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, | |
2103 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, | |
3915c3b5 | 2104 | { ATA_CMD_DOWNLOAD_MICRO_DMA, "DOWNLOAD MICROCODE DMA" }, |
6521148c | 2105 | { ATA_CMD_NOP, "NOP" }, |
825e2d87 HR |
2106 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, |
2107 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, | |
2108 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, | |
2109 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, | |
2110 | { ATA_CMD_SERVICE, "SERVICE" }, | |
2111 | { ATA_CMD_READ, "READ DMA" }, | |
2112 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, | |
2113 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, | |
2114 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, | |
6521148c | 2115 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, |
825e2d87 HR |
2116 | { ATA_CMD_WRITE, "WRITE DMA" }, |
2117 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, | |
2118 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, | |
2119 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, | |
6521148c RH |
2120 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, |
2121 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, | |
2122 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, | |
2123 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, | |
2124 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, | |
d3122bf9 | 2125 | { ATA_CMD_NCQ_NON_DATA, "NCQ NON-DATA" }, |
3915c3b5 RH |
2126 | { ATA_CMD_FPDMA_SEND, "SEND FPDMA QUEUED" }, |
2127 | { ATA_CMD_FPDMA_RECV, "RECEIVE FPDMA QUEUED" }, | |
6521148c RH |
2128 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, |
2129 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, | |
2130 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, | |
2131 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, | |
2132 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, | |
2133 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, | |
2134 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, | |
2135 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, | |
825e2d87 | 2136 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, |
6521148c RH |
2137 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, |
2138 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, | |
2139 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, | |
2140 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, | |
2141 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, | |
2142 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, | |
2143 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, | |
2144 | { ATA_CMD_SLEEP, "SLEEP" }, | |
2145 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, | |
2146 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, | |
2147 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, | |
2148 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, | |
2149 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, | |
2150 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, | |
2151 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, | |
2152 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, | |
825e2d87 | 2153 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, |
3915c3b5 | 2154 | { ATA_CMD_TRUSTED_NONDATA, "TRUSTED NON-DATA" }, |
6521148c | 2155 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, |
825e2d87 | 2156 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, |
6521148c | 2157 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, |
825e2d87 | 2158 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, |
6521148c | 2159 | { ATA_CMD_PMP_READ, "READ BUFFER" }, |
3915c3b5 | 2160 | { ATA_CMD_PMP_READ_DMA, "READ BUFFER DMA" }, |
6521148c | 2161 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, |
3915c3b5 | 2162 | { ATA_CMD_PMP_WRITE_DMA, "WRITE BUFFER DMA" }, |
6521148c RH |
2163 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, |
2164 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, | |
2165 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, | |
2166 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, | |
2167 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, | |
2168 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, | |
2169 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, | |
2170 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, | |
2171 | { ATA_CMD_SMART, "SMART" }, | |
2172 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, | |
2173 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, | |
acad7627 | 2174 | { ATA_CMD_DSM, "DATA SET MANAGEMENT" }, |
825e2d87 HR |
2175 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, |
2176 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, | |
6521148c RH |
2177 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, |
2178 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, | |
2179 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, | |
825e2d87 | 2180 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, |
3915c3b5 RH |
2181 | { ATA_CMD_REQ_SENSE_DATA, "REQUEST SENSE DATA EXT" }, |
2182 | { ATA_CMD_SANITIZE_DEVICE, "SANITIZE DEVICE" }, | |
28a3fc22 | 2183 | { ATA_CMD_ZAC_MGMT_IN, "ZAC MANAGEMENT IN" }, |
27708a95 | 2184 | { ATA_CMD_ZAC_MGMT_OUT, "ZAC MANAGEMENT OUT" }, |
6521148c RH |
2185 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, |
2186 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, | |
2187 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, | |
2188 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, | |
2189 | { ATA_CMD_RESTORE, "RECALIBRATE" }, | |
2190 | { 0, NULL } /* terminate list */ | |
2191 | }; | |
2192 | ||
2193 | unsigned int i; | |
2194 | for (i = 0; cmd_descr[i].text; i++) | |
2195 | if (cmd_descr[i].command == command) | |
2196 | return cmd_descr[i].text; | |
2197 | #endif | |
2198 | ||
d4520903 | 2199 | return "unknown"; |
6521148c | 2200 | } |
d4520903 | 2201 | EXPORT_SYMBOL_GPL(ata_get_cmd_name); |
6521148c | 2202 | |
9b1e2658 TH |
2203 | /** |
2204 | * ata_eh_link_report - report error handling to user | |
0260731f | 2205 | * @link: ATA link EH is going on |
022bdb07 TH |
2206 | * |
2207 | * Report EH to user. | |
2208 | * | |
2209 | * LOCKING: | |
2210 | * None. | |
2211 | */ | |
9b1e2658 | 2212 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2213 | { |
0260731f TH |
2214 | struct ata_port *ap = link->ap; |
2215 | struct ata_eh_context *ehc = &link->eh_context; | |
258c4e5c | 2216 | struct ata_queued_cmd *qc; |
022bdb07 | 2217 | const char *frozen, *desc; |
462098b0 | 2218 | char tries_buf[6] = ""; |
022bdb07 TH |
2219 | int tag, nr_failed = 0; |
2220 | ||
94ff3d54 TH |
2221 | if (ehc->i.flags & ATA_EHI_QUIET) |
2222 | return; | |
2223 | ||
022bdb07 TH |
2224 | desc = NULL; |
2225 | if (ehc->i.desc[0] != '\0') | |
2226 | desc = ehc->i.desc; | |
2227 | ||
258c4e5c | 2228 | ata_qc_for_each_raw(ap, qc, tag) { |
b1c72916 TH |
2229 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2230 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2231 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2232 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2233 | continue; |
2234 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2235 | continue; | |
2236 | ||
2237 | nr_failed++; | |
2238 | } | |
2239 | ||
2240 | if (!nr_failed && !ehc->i.err_mask) | |
2241 | return; | |
2242 | ||
2243 | frozen = ""; | |
b51e9e5d | 2244 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2245 | frozen = " frozen"; |
2246 | ||
a1e10f7e | 2247 | if (ap->eh_tries < ATA_EH_MAX_TRIES) |
462098b0 | 2248 | snprintf(tries_buf, sizeof(tries_buf), " t%d", |
a1e10f7e TH |
2249 | ap->eh_tries); |
2250 | ||
022bdb07 | 2251 | if (ehc->i.dev) { |
a9a79dfe JP |
2252 | ata_dev_err(ehc->i.dev, "exception Emask 0x%x " |
2253 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2254 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2255 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2256 | if (desc) |
a9a79dfe | 2257 | ata_dev_err(ehc->i.dev, "%s\n", desc); |
022bdb07 | 2258 | } else { |
a9a79dfe JP |
2259 | ata_link_err(link, "exception Emask 0x%x " |
2260 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2261 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2262 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2263 | if (desc) |
a9a79dfe | 2264 | ata_link_err(link, "%s\n", desc); |
022bdb07 TH |
2265 | } |
2266 | ||
6521148c | 2267 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2268 | if (ehc->i.serror) |
a9a79dfe | 2269 | ata_link_err(link, |
1333e194 RH |
2270 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2271 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2272 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2273 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2274 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2275 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2276 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2277 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2278 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2279 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2280 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2281 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2282 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2283 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2284 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2285 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2286 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2287 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
6521148c | 2288 | #endif |
1333e194 | 2289 | |
258c4e5c | 2290 | ata_qc_for_each_raw(ap, qc, tag) { |
8a937581 | 2291 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2292 | char data_buf[20] = ""; |
2293 | char cdb_buf[70] = ""; | |
022bdb07 | 2294 | |
0260731f | 2295 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2296 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2297 | continue; |
2298 | ||
abb6a889 TH |
2299 | if (qc->dma_dir != DMA_NONE) { |
2300 | static const char *dma_str[] = { | |
2301 | [DMA_BIDIRECTIONAL] = "bidi", | |
2302 | [DMA_TO_DEVICE] = "out", | |
2303 | [DMA_FROM_DEVICE] = "in", | |
2304 | }; | |
fb1b8b11 GU |
2305 | const char *prot_str = NULL; |
2306 | ||
2307 | switch (qc->tf.protocol) { | |
2308 | case ATA_PROT_UNKNOWN: | |
2309 | prot_str = "unknown"; | |
2310 | break; | |
2311 | case ATA_PROT_NODATA: | |
2312 | prot_str = "nodata"; | |
2313 | break; | |
2314 | case ATA_PROT_PIO: | |
2315 | prot_str = "pio"; | |
2316 | break; | |
2317 | case ATA_PROT_DMA: | |
2318 | prot_str = "dma"; | |
2319 | break; | |
2320 | case ATA_PROT_NCQ: | |
2321 | prot_str = "ncq dma"; | |
2322 | break; | |
2323 | case ATA_PROT_NCQ_NODATA: | |
2324 | prot_str = "ncq nodata"; | |
2325 | break; | |
2326 | case ATAPI_PROT_NODATA: | |
2327 | prot_str = "nodata"; | |
2328 | break; | |
2329 | case ATAPI_PROT_PIO: | |
2330 | prot_str = "pio"; | |
2331 | break; | |
2332 | case ATAPI_PROT_DMA: | |
2333 | prot_str = "dma"; | |
2334 | break; | |
2335 | } | |
abb6a889 | 2336 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", |
fb1b8b11 | 2337 | prot_str, qc->nbytes, dma_str[qc->dma_dir]); |
abb6a889 TH |
2338 | } |
2339 | ||
6521148c | 2340 | if (ata_is_atapi(qc->tf.protocol)) { |
a13b0c9d HR |
2341 | const u8 *cdb = qc->cdb; |
2342 | size_t cdb_len = qc->dev->cdb_len; | |
2343 | ||
cbba5b0e HR |
2344 | if (qc->scsicmd) { |
2345 | cdb = qc->scsicmd->cmnd; | |
2346 | cdb_len = qc->scsicmd->cmd_len; | |
2347 | } | |
2348 | __scsi_format_command(cdb_buf, sizeof(cdb_buf), | |
2349 | cdb, cdb_len); | |
d4520903 HR |
2350 | } else |
2351 | ata_dev_err(qc->dev, "failed command: %s\n", | |
2352 | ata_get_cmd_name(cmd->command)); | |
abb6a889 | 2353 | |
a9a79dfe | 2354 | ata_dev_err(qc->dev, |
8a937581 | 2355 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
abb6a889 | 2356 | "tag %d%s\n %s" |
8a937581 | 2357 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2358 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2359 | cmd->command, cmd->feature, cmd->nsect, |
2360 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2361 | cmd->hob_feature, cmd->hob_nsect, | |
2362 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2363 | cmd->device, qc->tag, data_buf, cdb_buf, |
efcef265 | 2364 | res->status, res->error, res->nsect, |
8a937581 TH |
2365 | res->lbal, res->lbam, res->lbah, |
2366 | res->hob_feature, res->hob_nsect, | |
2367 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2368 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2369 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 | 2370 | |
6521148c | 2371 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
efcef265 SS |
2372 | if (res->status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
2373 | ATA_SENSE | ATA_ERR)) { | |
2374 | if (res->status & ATA_BUSY) | |
a9a79dfe | 2375 | ata_dev_err(qc->dev, "status: { Busy }\n"); |
1333e194 | 2376 | else |
e87fd28c | 2377 | ata_dev_err(qc->dev, "status: { %s%s%s%s%s}\n", |
efcef265 SS |
2378 | res->status & ATA_DRDY ? "DRDY " : "", |
2379 | res->status & ATA_DF ? "DF " : "", | |
2380 | res->status & ATA_DRQ ? "DRQ " : "", | |
2381 | res->status & ATA_SENSE ? "SENSE " : "", | |
2382 | res->status & ATA_ERR ? "ERR " : ""); | |
1333e194 RH |
2383 | } |
2384 | ||
2385 | if (cmd->command != ATA_CMD_PACKET && | |
efcef265 SS |
2386 | (res->error & (ATA_ICRC | ATA_UNC | ATA_AMNF | ATA_IDNF | |
2387 | ATA_ABORTED))) | |
eec7e1c1 | 2388 | ata_dev_err(qc->dev, "error: { %s%s%s%s%s}\n", |
efcef265 SS |
2389 | res->error & ATA_ICRC ? "ICRC " : "", |
2390 | res->error & ATA_UNC ? "UNC " : "", | |
2391 | res->error & ATA_AMNF ? "AMNF " : "", | |
2392 | res->error & ATA_IDNF ? "IDNF " : "", | |
2393 | res->error & ATA_ABORTED ? "ABRT " : ""); | |
6521148c | 2394 | #endif |
022bdb07 TH |
2395 | } |
2396 | } | |
2397 | ||
9b1e2658 TH |
2398 | /** |
2399 | * ata_eh_report - report error handling to user | |
2400 | * @ap: ATA port to report EH about | |
2401 | * | |
2402 | * Report EH to user. | |
2403 | * | |
2404 | * LOCKING: | |
2405 | * None. | |
2406 | */ | |
fb7fd614 | 2407 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2408 | { |
2409 | struct ata_link *link; | |
2410 | ||
1eca4365 | 2411 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2412 | ata_eh_link_report(link); |
2413 | } | |
2414 | ||
cc0680a5 | 2415 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2416 | unsigned int *classes, unsigned long deadline, |
2417 | bool clear_classes) | |
d87fa38e | 2418 | { |
f58229f8 | 2419 | struct ata_device *dev; |
d87fa38e | 2420 | |
b1c72916 | 2421 | if (clear_classes) |
1eca4365 | 2422 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2423 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2424 | |
f046519f | 2425 | return reset(link, classes, deadline); |
d87fa38e TH |
2426 | } |
2427 | ||
e8411fba | 2428 | static int ata_eh_followup_srst_needed(struct ata_link *link, int rc) |
664faf09 | 2429 | { |
45db2f6c | 2430 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2431 | return 0; |
5dbfc9cb TH |
2432 | if (rc == -EAGAIN) |
2433 | return 1; | |
071f44b1 | 2434 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2435 | return 1; |
664faf09 TH |
2436 | return 0; |
2437 | } | |
2438 | ||
fb7fd614 TH |
2439 | int ata_eh_reset(struct ata_link *link, int classify, |
2440 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2441 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2442 | { |
afaa5c37 | 2443 | struct ata_port *ap = link->ap; |
b1c72916 | 2444 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2445 | struct ata_eh_context *ehc = &link->eh_context; |
705d2014 | 2446 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
664faf09 | 2447 | unsigned int *classes = ehc->classes; |
416dc9ed | 2448 | unsigned int lflags = link->flags; |
1cdaf534 | 2449 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2450 | int max_tries = 0, try = 0; |
b1c72916 | 2451 | struct ata_link *failed_link; |
f58229f8 | 2452 | struct ata_device *dev; |
416dc9ed | 2453 | unsigned long deadline, now; |
022bdb07 | 2454 | ata_reset_fn_t reset; |
afaa5c37 | 2455 | unsigned long flags; |
416dc9ed | 2456 | u32 sstatus; |
b1c72916 | 2457 | int nr_unknown, rc; |
022bdb07 | 2458 | |
932648b0 TH |
2459 | /* |
2460 | * Prepare to reset | |
2461 | */ | |
d8af0eb6 TH |
2462 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2463 | max_tries++; | |
ca6d43b0 DW |
2464 | if (link->flags & ATA_LFLAG_RST_ONCE) |
2465 | max_tries = 1; | |
05944bdf TH |
2466 | if (link->flags & ATA_LFLAG_NO_HRST) |
2467 | hardreset = NULL; | |
2468 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2469 | softreset = NULL; | |
d8af0eb6 | 2470 | |
25985edc | 2471 | /* make sure each reset attempt is at least COOL_DOWN apart */ |
19b72321 TH |
2472 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
2473 | now = jiffies; | |
2474 | WARN_ON(time_after(ehc->last_reset, now)); | |
2475 | deadline = ata_deadline(ehc->last_reset, | |
2476 | ATA_EH_RESET_COOL_DOWN); | |
2477 | if (time_before(now, deadline)) | |
2478 | schedule_timeout_uninterruptible(deadline - now); | |
2479 | } | |
0a2c0f56 | 2480 | |
afaa5c37 TH |
2481 | spin_lock_irqsave(ap->lock, flags); |
2482 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2483 | spin_unlock_irqrestore(ap->lock, flags); | |
2484 | ||
cf480626 | 2485 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2486 | |
1eca4365 | 2487 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2488 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2489 | * may change configuration and be in PIO0 timing. If | |
2490 | * we do a hard reset (or are coming from power on) | |
2491 | * this is true for ATA or ATAPI. Until we've set a | |
2492 | * suitable controller mode we should not touch the | |
2493 | * bus as we may be talking too fast. | |
2494 | */ | |
2495 | dev->pio_mode = XFER_PIO_0; | |
5416912a | 2496 | dev->dma_mode = 0xff; |
cdeab114 TH |
2497 | |
2498 | /* If the controller has a pio mode setup function | |
2499 | * then use it to set the chipset to rights. Don't | |
2500 | * touch the DMA setup as that will be dealt with when | |
2501 | * configuring devices. | |
2502 | */ | |
2503 | if (ap->ops->set_piomode) | |
2504 | ap->ops->set_piomode(ap, dev); | |
2505 | } | |
2506 | ||
cf480626 | 2507 | /* prefer hardreset */ |
932648b0 | 2508 | reset = NULL; |
cf480626 TH |
2509 | ehc->i.action &= ~ATA_EH_RESET; |
2510 | if (hardreset) { | |
2511 | reset = hardreset; | |
a674050e | 2512 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2513 | } else if (softreset) { |
cf480626 | 2514 | reset = softreset; |
a674050e | 2515 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2516 | } |
f5914a46 TH |
2517 | |
2518 | if (prereset) { | |
b1c72916 TH |
2519 | unsigned long deadline = ata_deadline(jiffies, |
2520 | ATA_EH_PRERESET_TIMEOUT); | |
2521 | ||
2522 | if (slave) { | |
2523 | sehc->i.action &= ~ATA_EH_RESET; | |
2524 | sehc->i.action |= ehc->i.action; | |
2525 | } | |
2526 | ||
2527 | rc = prereset(link, deadline); | |
2528 | ||
2529 | /* If present, do prereset on slave link too. Reset | |
2530 | * is skipped iff both master and slave links report | |
2531 | * -ENOENT or clear ATA_EH_RESET. | |
2532 | */ | |
2533 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2534 | int tmp; | |
2535 | ||
2536 | tmp = prereset(slave, deadline); | |
2537 | if (tmp != -ENOENT) | |
2538 | rc = tmp; | |
2539 | ||
2540 | ehc->i.action |= sehc->i.action; | |
2541 | } | |
2542 | ||
f5914a46 | 2543 | if (rc) { |
c961922b | 2544 | if (rc == -ENOENT) { |
a9a79dfe | 2545 | ata_link_dbg(link, "port disabled--ignoring\n"); |
cf480626 | 2546 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2547 | |
1eca4365 | 2548 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2549 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2550 | |
2551 | rc = 0; | |
c961922b | 2552 | } else |
a9a79dfe JP |
2553 | ata_link_err(link, |
2554 | "prereset failed (errno=%d)\n", | |
2555 | rc); | |
fccb6ea5 | 2556 | goto out; |
f5914a46 | 2557 | } |
f5914a46 | 2558 | |
932648b0 | 2559 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2560 | * bang classes, thaw and return. |
932648b0 TH |
2561 | */ |
2562 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2563 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2564 | classes[dev->devno] = ATA_DEV_NONE; |
d6515e6f TH |
2565 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
2566 | ata_is_host_link(link)) | |
2567 | ata_eh_thaw_port(ap); | |
932648b0 TH |
2568 | rc = 0; |
2569 | goto out; | |
2570 | } | |
f5914a46 TH |
2571 | } |
2572 | ||
022bdb07 | 2573 | retry: |
932648b0 TH |
2574 | /* |
2575 | * Perform reset | |
2576 | */ | |
dc98c32c TH |
2577 | if (ata_is_host_link(link)) |
2578 | ata_eh_freeze_port(ap); | |
2579 | ||
341c2c95 | 2580 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2581 | |
932648b0 TH |
2582 | if (reset) { |
2583 | if (verbose) | |
a9a79dfe JP |
2584 | ata_link_info(link, "%s resetting link\n", |
2585 | reset == softreset ? "soft" : "hard"); | |
932648b0 TH |
2586 | |
2587 | /* mark that this EH session started with reset */ | |
19b72321 | 2588 | ehc->last_reset = jiffies; |
f8ec26d0 | 2589 | if (reset == hardreset) { |
932648b0 | 2590 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; |
f8ec26d0 HR |
2591 | trace_ata_link_hardreset_begin(link, classes, deadline); |
2592 | } else { | |
932648b0 | 2593 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; |
f8ec26d0 HR |
2594 | trace_ata_link_softreset_begin(link, classes, deadline); |
2595 | } | |
022bdb07 | 2596 | |
b1c72916 | 2597 | rc = ata_do_reset(link, reset, classes, deadline, true); |
f8ec26d0 HR |
2598 | if (reset == hardreset) |
2599 | trace_ata_link_hardreset_end(link, classes, rc); | |
2600 | else | |
2601 | trace_ata_link_softreset_end(link, classes, rc); | |
b1c72916 TH |
2602 | if (rc && rc != -EAGAIN) { |
2603 | failed_link = link; | |
5dbfc9cb | 2604 | goto fail; |
b1c72916 TH |
2605 | } |
2606 | ||
2607 | /* hardreset slave link if existent */ | |
2608 | if (slave && reset == hardreset) { | |
2609 | int tmp; | |
2610 | ||
2611 | if (verbose) | |
a9a79dfe | 2612 | ata_link_info(slave, "hard resetting link\n"); |
b1c72916 TH |
2613 | |
2614 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
f8ec26d0 HR |
2615 | trace_ata_slave_hardreset_begin(slave, classes, |
2616 | deadline); | |
b1c72916 TH |
2617 | tmp = ata_do_reset(slave, reset, classes, deadline, |
2618 | false); | |
f8ec26d0 | 2619 | trace_ata_slave_hardreset_end(slave, classes, tmp); |
b1c72916 TH |
2620 | switch (tmp) { |
2621 | case -EAGAIN: | |
2622 | rc = -EAGAIN; | |
e06abcc6 | 2623 | break; |
b1c72916 TH |
2624 | case 0: |
2625 | break; | |
2626 | default: | |
2627 | failed_link = slave; | |
2628 | rc = tmp; | |
2629 | goto fail; | |
2630 | } | |
2631 | } | |
022bdb07 | 2632 | |
b1c72916 | 2633 | /* perform follow-up SRST if necessary */ |
932648b0 | 2634 | if (reset == hardreset && |
e8411fba | 2635 | ata_eh_followup_srst_needed(link, rc)) { |
932648b0 | 2636 | reset = softreset; |
022bdb07 | 2637 | |
932648b0 | 2638 | if (!reset) { |
a9a79dfe JP |
2639 | ata_link_err(link, |
2640 | "follow-up softreset required but no softreset available\n"); | |
b1c72916 | 2641 | failed_link = link; |
932648b0 TH |
2642 | rc = -EINVAL; |
2643 | goto fail; | |
2644 | } | |
664faf09 | 2645 | |
932648b0 | 2646 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
f8ec26d0 | 2647 | trace_ata_link_softreset_begin(link, classes, deadline); |
b1c72916 | 2648 | rc = ata_do_reset(link, reset, classes, deadline, true); |
f8ec26d0 | 2649 | trace_ata_link_softreset_end(link, classes, rc); |
fe2c4d01 TH |
2650 | if (rc) { |
2651 | failed_link = link; | |
2652 | goto fail; | |
2653 | } | |
664faf09 | 2654 | } |
932648b0 TH |
2655 | } else { |
2656 | if (verbose) | |
a9a79dfe JP |
2657 | ata_link_info(link, |
2658 | "no reset method available, skipping reset\n"); | |
932648b0 TH |
2659 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) |
2660 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2661 | } |
2662 | ||
932648b0 TH |
2663 | /* |
2664 | * Post-reset processing | |
2665 | */ | |
1eca4365 | 2666 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2667 | /* After the reset, the device state is PIO 0 and the |
2668 | * controller state is undefined. Reset also wakes up | |
2669 | * drives from sleeping mode. | |
2670 | */ | |
2671 | dev->pio_mode = XFER_PIO_0; | |
2672 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2673 | |
3b761d3d TH |
2674 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
2675 | continue; | |
2676 | ||
2677 | /* apply class override */ | |
2678 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2679 | classes[dev->devno] = ATA_DEV_ATA; | |
2680 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2681 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
022bdb07 TH |
2682 | } |
2683 | ||
416dc9ed TH |
2684 | /* record current link speed */ |
2685 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2686 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2687 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2688 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2689 | |
dc98c32c TH |
2690 | /* thaw the port */ |
2691 | if (ata_is_host_link(link)) | |
2692 | ata_eh_thaw_port(ap); | |
2693 | ||
f046519f TH |
2694 | /* postreset() should clear hardware SError. Although SError |
2695 | * is cleared during link resume, clearing SError here is | |
2696 | * necessary as some PHYs raise hotplug events after SRST. | |
2697 | * This introduces race condition where hotplug occurs between | |
2698 | * reset and here. This race is mediated by cross checking | |
2699 | * link onlineness and classification result later. | |
2700 | */ | |
b1c72916 | 2701 | if (postreset) { |
416dc9ed | 2702 | postreset(link, classes); |
f8ec26d0 HR |
2703 | trace_ata_link_postreset(link, classes, rc); |
2704 | if (slave) { | |
b1c72916 | 2705 | postreset(slave, classes); |
f8ec26d0 HR |
2706 | trace_ata_slave_postreset(slave, classes, rc); |
2707 | } | |
b1c72916 | 2708 | } |
20952b69 | 2709 | |
1e641060 | 2710 | /* |
8c56cacc TH |
2711 | * Some controllers can't be frozen very well and may set spurious |
2712 | * error conditions during reset. Clear accumulated error | |
2713 | * information and re-thaw the port if frozen. As reset is the | |
2714 | * final recovery action and we cross check link onlineness against | |
2715 | * device classification later, no hotplug event is lost by this. | |
1e641060 | 2716 | */ |
f046519f | 2717 | spin_lock_irqsave(link->ap->lock, flags); |
1e641060 | 2718 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
b1c72916 | 2719 | if (slave) |
1e641060 TH |
2720 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
2721 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
f046519f TH |
2722 | spin_unlock_irqrestore(link->ap->lock, flags); |
2723 | ||
8c56cacc TH |
2724 | if (ap->pflags & ATA_PFLAG_FROZEN) |
2725 | ata_eh_thaw_port(ap); | |
2726 | ||
3b761d3d TH |
2727 | /* |
2728 | * Make sure onlineness and classification result correspond. | |
f046519f TH |
2729 | * Hotplug could have happened during reset and some |
2730 | * controllers fail to wait while a drive is spinning up after | |
2731 | * being hotplugged causing misdetection. By cross checking | |
3b761d3d TH |
2732 | * link on/offlineness and classification result, those |
2733 | * conditions can be reliably detected and retried. | |
f046519f | 2734 | */ |
b1c72916 | 2735 | nr_unknown = 0; |
1eca4365 | 2736 | ata_for_each_dev(dev, link, ALL) { |
3b761d3d TH |
2737 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
2738 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe | 2739 | ata_dev_dbg(dev, "link online but device misclassified\n"); |
3b761d3d | 2740 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2741 | nr_unknown++; |
3b761d3d TH |
2742 | } |
2743 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { | |
2744 | if (ata_class_enabled(classes[dev->devno])) | |
a9a79dfe JP |
2745 | ata_dev_dbg(dev, |
2746 | "link offline, clearing class %d to NONE\n", | |
2747 | classes[dev->devno]); | |
3b761d3d TH |
2748 | classes[dev->devno] = ATA_DEV_NONE; |
2749 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe JP |
2750 | ata_dev_dbg(dev, |
2751 | "link status unknown, clearing UNKNOWN to NONE\n"); | |
3b761d3d | 2752 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2753 | } |
f046519f TH |
2754 | } |
2755 | ||
b1c72916 | 2756 | if (classify && nr_unknown) { |
f046519f | 2757 | if (try < max_tries) { |
a9a79dfe JP |
2758 | ata_link_warn(link, |
2759 | "link online but %d devices misclassified, retrying\n", | |
2760 | nr_unknown); | |
b1c72916 | 2761 | failed_link = link; |
f046519f TH |
2762 | rc = -EAGAIN; |
2763 | goto fail; | |
2764 | } | |
a9a79dfe JP |
2765 | ata_link_warn(link, |
2766 | "link online but %d devices misclassified, " | |
2767 | "device detection might fail\n", nr_unknown); | |
f046519f TH |
2768 | } |
2769 | ||
416dc9ed | 2770 | /* reset successful, schedule revalidation */ |
cf480626 | 2771 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2772 | if (slave) |
2773 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
6b7ae954 | 2774 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2775 | ehc->i.action |= ATA_EH_REVALIDATE; |
6b7ae954 | 2776 | link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */ |
ae791c05 | 2777 | |
416dc9ed | 2778 | rc = 0; |
fccb6ea5 TH |
2779 | out: |
2780 | /* clear hotplug flag */ | |
2781 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2782 | if (slave) |
2783 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2784 | |
2785 | spin_lock_irqsave(ap->lock, flags); | |
2786 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2787 | spin_unlock_irqrestore(ap->lock, flags); | |
2788 | ||
022bdb07 | 2789 | return rc; |
416dc9ed TH |
2790 | |
2791 | fail: | |
5958e302 TH |
2792 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2793 | if (!ata_is_host_link(link) && | |
2794 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2795 | rc = -ERESTART; | |
2796 | ||
7a46c078 | 2797 | if (try >= max_tries) { |
8ea7645c TH |
2798 | /* |
2799 | * Thaw host port even if reset failed, so that the port | |
2800 | * can be retried on the next phy event. This risks | |
2801 | * repeated EH runs but seems to be a better tradeoff than | |
2802 | * shutting down a port after a botched hotplug attempt. | |
2803 | */ | |
2804 | if (ata_is_host_link(link)) | |
2805 | ata_eh_thaw_port(ap); | |
416dc9ed | 2806 | goto out; |
8ea7645c | 2807 | } |
416dc9ed TH |
2808 | |
2809 | now = jiffies; | |
2810 | if (time_before(now, deadline)) { | |
2811 | unsigned long delta = deadline - now; | |
2812 | ||
a9a79dfe | 2813 | ata_link_warn(failed_link, |
0a2c0f56 TH |
2814 | "reset failed (errno=%d), retrying in %u secs\n", |
2815 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed | 2816 | |
c0c362b6 | 2817 | ata_eh_release(ap); |
416dc9ed TH |
2818 | while (delta) |
2819 | delta = schedule_timeout_uninterruptible(delta); | |
c0c362b6 | 2820 | ata_eh_acquire(ap); |
416dc9ed TH |
2821 | } |
2822 | ||
7a46c078 GG |
2823 | /* |
2824 | * While disks spinup behind PMP, some controllers fail sending SRST. | |
2825 | * They need to be reset - as well as the PMP - before retrying. | |
2826 | */ | |
2827 | if (rc == -ERESTART) { | |
2828 | if (ata_is_host_link(link)) | |
2829 | ata_eh_thaw_port(ap); | |
2830 | goto out; | |
2831 | } | |
2832 | ||
b1c72916 | 2833 | if (try == max_tries - 1) { |
a07d499b | 2834 | sata_down_spd_limit(link, 0); |
b1c72916 | 2835 | if (slave) |
a07d499b | 2836 | sata_down_spd_limit(slave, 0); |
b1c72916 | 2837 | } else if (rc == -EPIPE) |
a07d499b | 2838 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 2839 | |
416dc9ed TH |
2840 | if (hardreset) |
2841 | reset = hardreset; | |
2842 | goto retry; | |
022bdb07 TH |
2843 | } |
2844 | ||
45fabbb7 EO |
2845 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
2846 | { | |
2847 | struct ata_link *link; | |
2848 | struct ata_device *dev; | |
2849 | unsigned long flags; | |
2850 | ||
2851 | /* | |
2852 | * This function can be thought of as an extended version of | |
2853 | * ata_eh_about_to_do() specially crafted to accommodate the | |
2854 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
2855 | * does not leave the do {} while () loop in ata_eh_recover as | |
2856 | * long as the timeout for a park request to *one* device on | |
2857 | * the port has not expired, and since we still want to pick | |
2858 | * up park requests to other devices on the same port or | |
2859 | * timeout updates for the same device, we have to pull | |
2860 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
2861 | * ourselves at the beginning of each pass over the loop. | |
2862 | * | |
2863 | * Additionally, all write accesses to &ap->park_req_pending | |
16735d02 | 2864 | * through reinit_completion() (see below) or complete_all() |
45fabbb7 EO |
2865 | * (see ata_scsi_park_store()) are protected by the host lock. |
2866 | * As a result we have that park_req_pending.done is zero on | |
2867 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
2868 | * *all* devices on port ap have been pulled into the | |
2869 | * respective eh_context structs. If, and only if, | |
2870 | * park_req_pending.done is non-zero by the time we reach | |
2871 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
2872 | * has been scheduled for at least one of the devices on port | |
2873 | * ap and we have to cycle over the do {} while () loop in | |
2874 | * ata_eh_recover() again. | |
2875 | */ | |
2876 | ||
2877 | spin_lock_irqsave(ap->lock, flags); | |
16735d02 | 2878 | reinit_completion(&ap->park_req_pending); |
1eca4365 TH |
2879 | ata_for_each_link(link, ap, EDGE) { |
2880 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
2881 | struct ata_eh_info *ehi = &link->eh_info; |
2882 | ||
2883 | link->eh_context.i.dev_action[dev->devno] |= | |
2884 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
2885 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
2886 | } | |
2887 | } | |
2888 | spin_unlock_irqrestore(ap->lock, flags); | |
2889 | } | |
2890 | ||
2891 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
2892 | { | |
2893 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2894 | struct ata_taskfile tf; | |
2895 | unsigned int err_mask; | |
2896 | ||
2897 | ata_tf_init(dev, &tf); | |
2898 | if (park) { | |
2899 | ehc->unloaded_mask |= 1 << dev->devno; | |
2900 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
2901 | tf.feature = 0x44; | |
2902 | tf.lbal = 0x4c; | |
2903 | tf.lbam = 0x4e; | |
2904 | tf.lbah = 0x55; | |
2905 | } else { | |
2906 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2907 | tf.command = ATA_CMD_CHK_POWER; | |
2908 | } | |
2909 | ||
2910 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
bd18bc04 | 2911 | tf.protocol = ATA_PROT_NODATA; |
45fabbb7 EO |
2912 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
2913 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
a9a79dfe | 2914 | ata_dev_err(dev, "head unload failed!\n"); |
45fabbb7 EO |
2915 | ehc->unloaded_mask &= ~(1 << dev->devno); |
2916 | } | |
2917 | } | |
2918 | ||
0260731f | 2919 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2920 | struct ata_device **r_failed_dev) |
022bdb07 | 2921 | { |
0260731f TH |
2922 | struct ata_port *ap = link->ap; |
2923 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2924 | struct ata_device *dev; |
8c3c52a8 | 2925 | unsigned int new_mask = 0; |
084fe639 | 2926 | unsigned long flags; |
f58229f8 | 2927 | int rc = 0; |
022bdb07 | 2928 | |
8c3c52a8 TH |
2929 | /* For PATA drive side cable detection to work, IDENTIFY must |
2930 | * be done backwards such that PDIAG- is released by the slave | |
2931 | * device before the master device is identified. | |
2932 | */ | |
1eca4365 | 2933 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
2934 | unsigned int action = ata_eh_dev_action(dev); |
2935 | unsigned int readid_flags = 0; | |
022bdb07 | 2936 | |
bff04647 TH |
2937 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2938 | readid_flags |= ATA_READID_POSTRESET; | |
2939 | ||
9666f400 | 2940 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2941 | WARN_ON(dev->class == ATA_DEV_PMP); |
2942 | ||
b1c72916 | 2943 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 2944 | rc = -EIO; |
8c3c52a8 | 2945 | goto err; |
022bdb07 TH |
2946 | } |
2947 | ||
0260731f | 2948 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2949 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2950 | readid_flags); | |
022bdb07 | 2951 | if (rc) |
8c3c52a8 | 2952 | goto err; |
022bdb07 | 2953 | |
0260731f | 2954 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2955 | |
baa1e78a TH |
2956 | /* Configuration may have changed, reconfigure |
2957 | * transfer mode. | |
2958 | */ | |
2959 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2960 | ||
3057ac3c | 2961 | /* schedule the scsi_rescan_device() here */ |
ad72cf98 | 2962 | schedule_work(&(ap->scsi_rescan_task)); |
084fe639 TH |
2963 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2964 | ehc->tries[dev->devno] && | |
2965 | ata_class_enabled(ehc->classes[dev->devno])) { | |
842faa6c TH |
2966 | /* Temporarily set dev->class, it will be |
2967 | * permanently set once all configurations are | |
2968 | * complete. This is necessary because new | |
2969 | * device configuration is done in two | |
2970 | * separate loops. | |
2971 | */ | |
084fe639 TH |
2972 | dev->class = ehc->classes[dev->devno]; |
2973 | ||
633273a3 TH |
2974 | if (dev->class == ATA_DEV_PMP) |
2975 | rc = sata_pmp_attach(dev); | |
2976 | else | |
2977 | rc = ata_dev_read_id(dev, &dev->class, | |
2978 | readid_flags, dev->id); | |
842faa6c TH |
2979 | |
2980 | /* read_id might have changed class, store and reset */ | |
2981 | ehc->classes[dev->devno] = dev->class; | |
2982 | dev->class = ATA_DEV_UNKNOWN; | |
2983 | ||
8c3c52a8 TH |
2984 | switch (rc) { |
2985 | case 0: | |
99cf610a TH |
2986 | /* clear error info accumulated during probe */ |
2987 | ata_ering_clear(&dev->ering); | |
f58229f8 | 2988 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2989 | break; |
2990 | case -ENOENT: | |
55a8e2c8 TH |
2991 | /* IDENTIFY was issued to non-existent |
2992 | * device. No need to reset. Just | |
842faa6c | 2993 | * thaw and ignore the device. |
55a8e2c8 TH |
2994 | */ |
2995 | ata_eh_thaw_port(ap); | |
084fe639 | 2996 | break; |
8c3c52a8 | 2997 | default: |
8c3c52a8 | 2998 | goto err; |
084fe639 | 2999 | } |
8c3c52a8 TH |
3000 | } |
3001 | } | |
084fe639 | 3002 | |
c1c4e8d5 | 3003 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
3004 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
3005 | if (ap->ops->cable_detect) | |
3006 | ap->cbl = ap->ops->cable_detect(ap); | |
3007 | ata_force_cbl(ap); | |
3008 | } | |
c1c4e8d5 | 3009 | |
8c3c52a8 TH |
3010 | /* Configure new devices forward such that user doesn't see |
3011 | * device detection messages backwards. | |
3012 | */ | |
1eca4365 | 3013 | ata_for_each_dev(dev, link, ALL) { |
4f7c2874 | 3014 | if (!(new_mask & (1 << dev->devno))) |
8c3c52a8 TH |
3015 | continue; |
3016 | ||
842faa6c TH |
3017 | dev->class = ehc->classes[dev->devno]; |
3018 | ||
4f7c2874 TH |
3019 | if (dev->class == ATA_DEV_PMP) |
3020 | continue; | |
3021 | ||
8c3c52a8 TH |
3022 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
3023 | rc = ata_dev_configure(dev); | |
3024 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
842faa6c TH |
3025 | if (rc) { |
3026 | dev->class = ATA_DEV_UNKNOWN; | |
8c3c52a8 | 3027 | goto err; |
842faa6c | 3028 | } |
8c3c52a8 TH |
3029 | |
3030 | spin_lock_irqsave(ap->lock, flags); | |
3031 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
3032 | spin_unlock_irqrestore(ap->lock, flags); | |
3033 | ||
3034 | /* new device discovered, configure xfermode */ | |
3035 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
3036 | } |
3037 | ||
8c3c52a8 | 3038 | return 0; |
022bdb07 | 3039 | |
8c3c52a8 TH |
3040 | err: |
3041 | *r_failed_dev = dev; | |
022bdb07 TH |
3042 | return rc; |
3043 | } | |
3044 | ||
6f1d1e3a TH |
3045 | /** |
3046 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
3047 | * @link: link on which timings will be programmed | |
98a1708d | 3048 | * @r_failed_dev: out parameter for failed device |
6f1d1e3a TH |
3049 | * |
3050 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3051 | * ata_set_mode() fails, pointer to the failing device is | |
3052 | * returned in @r_failed_dev. | |
3053 | * | |
3054 | * LOCKING: | |
3055 | * PCI/etc. bus probe sem. | |
3056 | * | |
3057 | * RETURNS: | |
3058 | * 0 on success, negative errno otherwise | |
3059 | */ | |
3060 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
3061 | { | |
3062 | struct ata_port *ap = link->ap; | |
00115e0f TH |
3063 | struct ata_device *dev; |
3064 | int rc; | |
6f1d1e3a | 3065 | |
76326ac1 | 3066 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 3067 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
3068 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
3069 | struct ata_ering_entry *ent; | |
3070 | ||
3071 | ent = ata_ering_top(&dev->ering); | |
3072 | if (ent) | |
3073 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
3074 | } | |
3075 | } | |
3076 | ||
6f1d1e3a TH |
3077 | /* has private set_mode? */ |
3078 | if (ap->ops->set_mode) | |
00115e0f TH |
3079 | rc = ap->ops->set_mode(link, r_failed_dev); |
3080 | else | |
3081 | rc = ata_do_set_mode(link, r_failed_dev); | |
3082 | ||
3083 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 3084 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
3085 | struct ata_eh_context *ehc = &link->eh_context; |
3086 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
3087 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
3088 | ||
3089 | if (dev->xfer_mode != saved_xfer_mode || | |
3090 | ata_ncq_enabled(dev) != saved_ncq) | |
3091 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
3092 | } | |
3093 | ||
3094 | return rc; | |
6f1d1e3a TH |
3095 | } |
3096 | ||
11fc33da TH |
3097 | /** |
3098 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
3099 | * @dev: ATAPI device to clear UA for | |
3100 | * | |
3101 | * Resets and other operations can make an ATAPI device raise | |
3102 | * UNIT ATTENTION which causes the next operation to fail. This | |
3103 | * function clears UA. | |
3104 | * | |
3105 | * LOCKING: | |
3106 | * EH context (may sleep). | |
3107 | * | |
3108 | * RETURNS: | |
3109 | * 0 on success, -errno on failure. | |
3110 | */ | |
3111 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
3112 | { | |
3113 | int i; | |
3114 | ||
3115 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 3116 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
3117 | u8 sense_key = 0; |
3118 | unsigned int err_mask; | |
3119 | ||
3120 | err_mask = atapi_eh_tur(dev, &sense_key); | |
3121 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3122 | ata_dev_warn(dev, |
3123 | "TEST_UNIT_READY failed (err_mask=0x%x)\n", | |
3124 | err_mask); | |
11fc33da TH |
3125 | return -EIO; |
3126 | } | |
3127 | ||
3128 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
3129 | return 0; | |
3130 | ||
3131 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
3132 | if (err_mask) { | |
a9a79dfe | 3133 | ata_dev_warn(dev, "failed to clear " |
11fc33da TH |
3134 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); |
3135 | return -EIO; | |
3136 | } | |
3137 | } | |
3138 | ||
a9a79dfe JP |
3139 | ata_dev_warn(dev, "UNIT ATTENTION persists after %d tries\n", |
3140 | ATA_EH_UA_TRIES); | |
11fc33da TH |
3141 | |
3142 | return 0; | |
3143 | } | |
3144 | ||
6013efd8 TH |
3145 | /** |
3146 | * ata_eh_maybe_retry_flush - Retry FLUSH if necessary | |
3147 | * @dev: ATA device which may need FLUSH retry | |
3148 | * | |
3149 | * If @dev failed FLUSH, it needs to be reported upper layer | |
3150 | * immediately as it means that @dev failed to remap and already | |
3151 | * lost at least a sector and further FLUSH retrials won't make | |
3152 | * any difference to the lost sector. However, if FLUSH failed | |
3153 | * for other reasons, for example transmission error, FLUSH needs | |
3154 | * to be retried. | |
3155 | * | |
3156 | * This function determines whether FLUSH failure retry is | |
3157 | * necessary and performs it if so. | |
3158 | * | |
3159 | * RETURNS: | |
3160 | * 0 if EH can continue, -errno if EH needs to be repeated. | |
3161 | */ | |
3162 | static int ata_eh_maybe_retry_flush(struct ata_device *dev) | |
3163 | { | |
3164 | struct ata_link *link = dev->link; | |
3165 | struct ata_port *ap = link->ap; | |
3166 | struct ata_queued_cmd *qc; | |
3167 | struct ata_taskfile tf; | |
3168 | unsigned int err_mask; | |
3169 | int rc = 0; | |
3170 | ||
3171 | /* did flush fail for this device? */ | |
3172 | if (!ata_tag_valid(link->active_tag)) | |
3173 | return 0; | |
3174 | ||
3175 | qc = __ata_qc_from_tag(ap, link->active_tag); | |
3176 | if (qc->dev != dev || (qc->tf.command != ATA_CMD_FLUSH_EXT && | |
3177 | qc->tf.command != ATA_CMD_FLUSH)) | |
3178 | return 0; | |
3179 | ||
3180 | /* if the device failed it, it should be reported to upper layers */ | |
3181 | if (qc->err_mask & AC_ERR_DEV) | |
3182 | return 0; | |
3183 | ||
3184 | /* flush failed for some other reason, give it another shot */ | |
3185 | ata_tf_init(dev, &tf); | |
3186 | ||
3187 | tf.command = qc->tf.command; | |
3188 | tf.flags |= ATA_TFLAG_DEVICE; | |
3189 | tf.protocol = ATA_PROT_NODATA; | |
3190 | ||
a9a79dfe | 3191 | ata_dev_warn(dev, "retrying FLUSH 0x%x Emask 0x%x\n", |
6013efd8 TH |
3192 | tf.command, qc->err_mask); |
3193 | ||
3194 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
3195 | if (!err_mask) { | |
3196 | /* | |
3197 | * FLUSH is complete but there's no way to | |
3198 | * successfully complete a failed command from EH. | |
3199 | * Making sure retry is allowed at least once and | |
3200 | * retrying it should do the trick - whatever was in | |
3201 | * the cache is already on the platter and this won't | |
3202 | * cause infinite loop. | |
3203 | */ | |
3204 | qc->scsicmd->allowed = max(qc->scsicmd->allowed, 1); | |
3205 | } else { | |
a9a79dfe | 3206 | ata_dev_warn(dev, "FLUSH failed Emask 0x%x\n", |
6013efd8 TH |
3207 | err_mask); |
3208 | rc = -EIO; | |
3209 | ||
3210 | /* if device failed it, report it to upper layers */ | |
3211 | if (err_mask & AC_ERR_DEV) { | |
3212 | qc->err_mask |= AC_ERR_DEV; | |
3213 | qc->result_tf = tf; | |
3214 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
3215 | rc = 0; | |
3216 | } | |
3217 | } | |
3218 | return rc; | |
3219 | } | |
3220 | ||
6b7ae954 TH |
3221 | /** |
3222 | * ata_eh_set_lpm - configure SATA interface power management | |
3223 | * @link: link to configure power management | |
3224 | * @policy: the link power management policy | |
3225 | * @r_failed_dev: out parameter for failed device | |
3226 | * | |
3227 | * Enable SATA Interface power management. This will enable | |
f4ac6476 HG |
3228 | * Device Interface Power Management (DIPM) for min_power and |
3229 | * medium_power_with_dipm policies, and then call driver specific | |
3230 | * callbacks for enabling Host Initiated Power management. | |
6b7ae954 TH |
3231 | * |
3232 | * LOCKING: | |
3233 | * EH context. | |
3234 | * | |
3235 | * RETURNS: | |
3236 | * 0 on success, -errno on failure. | |
3237 | */ | |
3238 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
3239 | struct ata_device **r_failed_dev) | |
3240 | { | |
6c8ea89c | 3241 | struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL; |
6b7ae954 TH |
3242 | struct ata_eh_context *ehc = &link->eh_context; |
3243 | struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; | |
e5005b15 | 3244 | enum ata_lpm_policy old_policy = link->lpm_policy; |
5f6f12cc | 3245 | bool no_dipm = link->ap->flags & ATA_FLAG_NO_DIPM; |
6b7ae954 TH |
3246 | unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; |
3247 | unsigned int err_mask; | |
3248 | int rc; | |
3249 | ||
3250 | /* if the link or host doesn't do LPM, noop */ | |
4c9029e7 BZ |
3251 | if (!IS_ENABLED(CONFIG_SATA_HOST) || |
3252 | (link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) | |
6b7ae954 TH |
3253 | return 0; |
3254 | ||
3255 | /* | |
3256 | * DIPM is enabled only for MIN_POWER as some devices | |
3257 | * misbehave when the host NACKs transition to SLUMBER. Order | |
3258 | * device and link configurations such that the host always | |
3259 | * allows DIPM requests. | |
3260 | */ | |
3261 | ata_for_each_dev(dev, link, ENABLED) { | |
3262 | bool hipm = ata_id_has_hipm(dev->id); | |
ae01b249 | 3263 | bool dipm = ata_id_has_dipm(dev->id) && !no_dipm; |
6b7ae954 TH |
3264 | |
3265 | /* find the first enabled and LPM enabled devices */ | |
3266 | if (!link_dev) | |
3267 | link_dev = dev; | |
3268 | ||
3269 | if (!lpm_dev && (hipm || dipm)) | |
3270 | lpm_dev = dev; | |
3271 | ||
3272 | hints &= ~ATA_LPM_EMPTY; | |
3273 | if (!hipm) | |
3274 | hints &= ~ATA_LPM_HIPM; | |
3275 | ||
3276 | /* disable DIPM before changing link config */ | |
f4ac6476 | 3277 | if (policy < ATA_LPM_MED_POWER_WITH_DIPM && dipm) { |
6b7ae954 TH |
3278 | err_mask = ata_dev_set_feature(dev, |
3279 | SETFEATURES_SATA_DISABLE, SATA_DIPM); | |
3280 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3281 | ata_dev_warn(dev, |
3282 | "failed to disable DIPM, Emask 0x%x\n", | |
3283 | err_mask); | |
6b7ae954 TH |
3284 | rc = -EIO; |
3285 | goto fail; | |
3286 | } | |
3287 | } | |
3288 | } | |
3289 | ||
6c8ea89c TH |
3290 | if (ap) { |
3291 | rc = ap->ops->set_lpm(link, policy, hints); | |
3292 | if (!rc && ap->slave_link) | |
3293 | rc = ap->ops->set_lpm(ap->slave_link, policy, hints); | |
3294 | } else | |
3295 | rc = sata_pmp_set_lpm(link, policy, hints); | |
6b7ae954 TH |
3296 | |
3297 | /* | |
3298 | * Attribute link config failure to the first (LPM) enabled | |
3299 | * device on the link. | |
3300 | */ | |
3301 | if (rc) { | |
3302 | if (rc == -EOPNOTSUPP) { | |
3303 | link->flags |= ATA_LFLAG_NO_LPM; | |
3304 | return 0; | |
3305 | } | |
3306 | dev = lpm_dev ? lpm_dev : link_dev; | |
3307 | goto fail; | |
3308 | } | |
3309 | ||
e5005b15 TH |
3310 | /* |
3311 | * Low level driver acked the transition. Issue DIPM command | |
3312 | * with the new policy set. | |
3313 | */ | |
3314 | link->lpm_policy = policy; | |
3315 | if (ap && ap->slave_link) | |
3316 | ap->slave_link->lpm_policy = policy; | |
3317 | ||
6b7ae954 TH |
3318 | /* host config updated, enable DIPM if transitioning to MIN_POWER */ |
3319 | ata_for_each_dev(dev, link, ENABLED) { | |
f4ac6476 | 3320 | if (policy >= ATA_LPM_MED_POWER_WITH_DIPM && !no_dipm && |
ae01b249 | 3321 | ata_id_has_dipm(dev->id)) { |
6b7ae954 TH |
3322 | err_mask = ata_dev_set_feature(dev, |
3323 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
3324 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe | 3325 | ata_dev_warn(dev, |
6b7ae954 TH |
3326 | "failed to enable DIPM, Emask 0x%x\n", |
3327 | err_mask); | |
3328 | rc = -EIO; | |
3329 | goto fail; | |
3330 | } | |
3331 | } | |
3332 | } | |
3333 | ||
09c5b480 GM |
3334 | link->last_lpm_change = jiffies; |
3335 | link->flags |= ATA_LFLAG_CHANGED; | |
3336 | ||
6b7ae954 TH |
3337 | return 0; |
3338 | ||
3339 | fail: | |
e5005b15 TH |
3340 | /* restore the old policy */ |
3341 | link->lpm_policy = old_policy; | |
3342 | if (ap && ap->slave_link) | |
3343 | ap->slave_link->lpm_policy = old_policy; | |
3344 | ||
6b7ae954 TH |
3345 | /* if no device or only one more chance is left, disable LPM */ |
3346 | if (!dev || ehc->tries[dev->devno] <= 2) { | |
a9a79dfe | 3347 | ata_link_warn(link, "disabling LPM on the link\n"); |
6b7ae954 TH |
3348 | link->flags |= ATA_LFLAG_NO_LPM; |
3349 | } | |
3350 | if (r_failed_dev) | |
3351 | *r_failed_dev = dev; | |
3352 | return rc; | |
3353 | } | |
3354 | ||
8a745f1f | 3355 | int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 3356 | { |
f58229f8 TH |
3357 | struct ata_device *dev; |
3358 | int cnt = 0; | |
022bdb07 | 3359 | |
1eca4365 TH |
3360 | ata_for_each_dev(dev, link, ENABLED) |
3361 | cnt++; | |
022bdb07 TH |
3362 | return cnt; |
3363 | } | |
3364 | ||
0260731f | 3365 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 3366 | { |
f58229f8 TH |
3367 | struct ata_device *dev; |
3368 | int cnt = 0; | |
084fe639 | 3369 | |
1eca4365 | 3370 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 3371 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
3372 | cnt++; |
3373 | return cnt; | |
3374 | } | |
3375 | ||
0260731f | 3376 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 3377 | { |
672b2d65 | 3378 | struct ata_port *ap = link->ap; |
0260731f | 3379 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 3380 | struct ata_device *dev; |
084fe639 | 3381 | |
f9df58cb TH |
3382 | /* skip disabled links */ |
3383 | if (link->flags & ATA_LFLAG_DISABLED) | |
3384 | return 1; | |
3385 | ||
e2f3d75f TH |
3386 | /* skip if explicitly requested */ |
3387 | if (ehc->i.flags & ATA_EHI_NO_RECOVERY) | |
3388 | return 1; | |
3389 | ||
672b2d65 TH |
3390 | /* thaw frozen port and recover failed devices */ |
3391 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
3392 | return 0; | |
3393 | ||
3394 | /* reset at least once if reset is requested */ | |
3395 | if ((ehc->i.action & ATA_EH_RESET) && | |
3396 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
3397 | return 0; |
3398 | ||
3399 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 3400 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
3401 | if (dev->class == ATA_DEV_UNKNOWN && |
3402 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
3403 | return 0; | |
3404 | } | |
3405 | ||
3406 | return 1; | |
3407 | } | |
3408 | ||
c2c7a89c TH |
3409 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
3410 | { | |
3411 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
3412 | u64 now = get_jiffies_64(); | |
3413 | int *trials = void_arg; | |
3414 | ||
6868225e LM |
3415 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || |
3416 | (ent->timestamp < now - min(now, interval))) | |
c2c7a89c TH |
3417 | return -1; |
3418 | ||
3419 | (*trials)++; | |
3420 | return 0; | |
3421 | } | |
3422 | ||
02c05a27 TH |
3423 | static int ata_eh_schedule_probe(struct ata_device *dev) |
3424 | { | |
3425 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3426 | struct ata_link *link = ata_dev_phys_link(dev); |
3427 | int trials = 0; | |
02c05a27 TH |
3428 | |
3429 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3430 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3431 | return 0; | |
3432 | ||
3433 | ata_eh_detach_dev(dev); | |
3434 | ata_dev_init(dev); | |
3435 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3436 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3437 | ehc->saved_xfer_mode[dev->devno] = 0; |
3438 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3439 | |
6b7ae954 | 3440 | /* the link maybe in a deep sleep, wake it up */ |
6c8ea89c TH |
3441 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { |
3442 | if (ata_is_host_link(link)) | |
3443 | link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER, | |
3444 | ATA_LPM_EMPTY); | |
3445 | else | |
3446 | sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER, | |
3447 | ATA_LPM_EMPTY); | |
3448 | } | |
6b7ae954 | 3449 | |
c2c7a89c TH |
3450 | /* Record and count probe trials on the ering. The specific |
3451 | * error mask used is irrelevant. Because a successful device | |
3452 | * detection clears the ering, this count accumulates only if | |
3453 | * there are consecutive failed probes. | |
3454 | * | |
3455 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3456 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3457 | * forced to 1.5Gbps. | |
3458 | * | |
3459 | * This is to work around cases where failed link speed | |
3460 | * negotiation results in device misdetection leading to | |
3461 | * infinite DEVXCHG or PHRDY CHG events. | |
3462 | */ | |
3463 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3464 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3465 | ||
3466 | if (trials > ATA_EH_PROBE_TRIALS) | |
3467 | sata_down_spd_limit(link, 1); | |
3468 | ||
02c05a27 TH |
3469 | return 1; |
3470 | } | |
3471 | ||
9b1e2658 | 3472 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3473 | { |
9af5c9c9 | 3474 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3475 | |
cf9a590a TH |
3476 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3477 | * The requester is responsible for ensuring forward progress. | |
3478 | */ | |
3479 | if (err != -EAGAIN) | |
3480 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3481 | |
3482 | switch (err) { | |
3483 | case -ENODEV: | |
3484 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3485 | ehc->i.probe_mask |= (1 << dev->devno); | |
df561f66 | 3486 | fallthrough; |
fee7ca72 TH |
3487 | case -EINVAL: |
3488 | /* give it just one more chance */ | |
3489 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
df561f66 | 3490 | fallthrough; |
fee7ca72 | 3491 | case -EIO: |
d89293ab | 3492 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3493 | /* This is the last chance, better to slow |
3494 | * down than lose it. | |
3495 | */ | |
a07d499b | 3496 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3497 | if (dev->pio_mode > XFER_PIO_0) |
3498 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3499 | } |
3500 | } | |
3501 | ||
3502 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3503 | /* disable device if it has used up all its chances */ | |
3504 | ata_dev_disable(dev); | |
3505 | ||
3506 | /* detach if offline */ | |
b1c72916 | 3507 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3508 | ata_eh_detach_dev(dev); |
3509 | ||
02c05a27 | 3510 | /* schedule probe if necessary */ |
87fbc5a0 | 3511 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3512 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3513 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3514 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3515 | } | |
9b1e2658 TH |
3516 | |
3517 | return 1; | |
fee7ca72 | 3518 | } else { |
cf480626 | 3519 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3520 | return 0; |
fee7ca72 TH |
3521 | } |
3522 | } | |
3523 | ||
022bdb07 TH |
3524 | /** |
3525 | * ata_eh_recover - recover host port after error | |
3526 | * @ap: host port to recover | |
f5914a46 | 3527 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3528 | * @softreset: softreset method (can be NULL) |
3529 | * @hardreset: hardreset method (can be NULL) | |
3530 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3531 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3532 | * |
3533 | * This is the alpha and omega, eum and yang, heart and soul of | |
3534 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3535 | * recover each link and hotplug requests are recorded in the |
3536 | * link's eh_context. This function executes all the operations | |
3537 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3538 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3539 | * |
3540 | * LOCKING: | |
3541 | * Kernel thread context (may sleep). | |
3542 | * | |
3543 | * RETURNS: | |
3544 | * 0 on success, -errno on failure. | |
3545 | */ | |
fb7fd614 TH |
3546 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3547 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3548 | ata_postreset_fn_t postreset, | |
3549 | struct ata_link **r_failed_link) | |
022bdb07 | 3550 | { |
9b1e2658 | 3551 | struct ata_link *link; |
022bdb07 | 3552 | struct ata_device *dev; |
6b7ae954 | 3553 | int rc, nr_fails; |
45fabbb7 | 3554 | unsigned long flags, deadline; |
022bdb07 | 3555 | |
022bdb07 | 3556 | /* prep for recovery */ |
1eca4365 | 3557 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3558 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3559 | |
f9df58cb TH |
3560 | /* re-enable link? */ |
3561 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3562 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3563 | spin_lock_irqsave(ap->lock, flags); | |
3564 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3565 | spin_unlock_irqrestore(ap->lock, flags); | |
3566 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3567 | } | |
3568 | ||
1eca4365 | 3569 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3570 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3571 | ehc->tries[dev->devno] = 1; | |
3572 | else | |
3573 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3574 | |
9b1e2658 TH |
3575 | /* collect port action mask recorded in dev actions */ |
3576 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3577 | ~ATA_EH_PERDEV_MASK; | |
3578 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3579 | ||
3580 | /* process hotplug request */ | |
3581 | if (dev->flags & ATA_DFLAG_DETACH) | |
3582 | ata_eh_detach_dev(dev); | |
3583 | ||
02c05a27 TH |
3584 | /* schedule probe if necessary */ |
3585 | if (!ata_dev_enabled(dev)) | |
3586 | ata_eh_schedule_probe(dev); | |
084fe639 | 3587 | } |
022bdb07 TH |
3588 | } |
3589 | ||
3590 | retry: | |
022bdb07 TH |
3591 | rc = 0; |
3592 | ||
aeb2ecd6 | 3593 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3594 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3595 | goto out; |
3596 | ||
9b1e2658 | 3597 | /* prep for EH */ |
1eca4365 | 3598 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3599 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3600 | |
9b1e2658 TH |
3601 | /* skip EH if possible. */ |
3602 | if (ata_eh_skip_recovery(link)) | |
3603 | ehc->i.action = 0; | |
3604 | ||
1eca4365 | 3605 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3606 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3607 | } | |
084fe639 | 3608 | |
022bdb07 | 3609 | /* reset */ |
1eca4365 | 3610 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3611 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3612 | |
dc98c32c TH |
3613 | if (!(ehc->i.action & ATA_EH_RESET)) |
3614 | continue; | |
9b1e2658 | 3615 | |
dc98c32c TH |
3616 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3617 | prereset, softreset, hardreset, postreset); | |
3618 | if (rc) { | |
a9a79dfe | 3619 | ata_link_err(link, "reset failed, giving up\n"); |
dc98c32c | 3620 | goto out; |
022bdb07 | 3621 | } |
022bdb07 TH |
3622 | } |
3623 | ||
45fabbb7 EO |
3624 | do { |
3625 | unsigned long now; | |
3626 | ||
3627 | /* | |
3628 | * clears ATA_EH_PARK in eh_info and resets | |
3629 | * ap->park_req_pending | |
3630 | */ | |
3631 | ata_eh_pull_park_action(ap); | |
3632 | ||
3633 | deadline = jiffies; | |
1eca4365 TH |
3634 | ata_for_each_link(link, ap, EDGE) { |
3635 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3636 | struct ata_eh_context *ehc = &link->eh_context; |
3637 | unsigned long tmp; | |
3638 | ||
9162c657 HR |
3639 | if (dev->class != ATA_DEV_ATA && |
3640 | dev->class != ATA_DEV_ZAC) | |
45fabbb7 EO |
3641 | continue; |
3642 | if (!(ehc->i.dev_action[dev->devno] & | |
3643 | ATA_EH_PARK)) | |
3644 | continue; | |
3645 | tmp = dev->unpark_deadline; | |
3646 | if (time_before(deadline, tmp)) | |
3647 | deadline = tmp; | |
3648 | else if (time_before_eq(tmp, jiffies)) | |
3649 | continue; | |
3650 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3651 | continue; | |
3652 | ||
3653 | ata_eh_park_issue_cmd(dev, 1); | |
3654 | } | |
3655 | } | |
3656 | ||
3657 | now = jiffies; | |
3658 | if (time_before_eq(deadline, now)) | |
3659 | break; | |
3660 | ||
c0c362b6 | 3661 | ata_eh_release(ap); |
45fabbb7 EO |
3662 | deadline = wait_for_completion_timeout(&ap->park_req_pending, |
3663 | deadline - now); | |
c0c362b6 | 3664 | ata_eh_acquire(ap); |
45fabbb7 | 3665 | } while (deadline); |
1eca4365 TH |
3666 | ata_for_each_link(link, ap, EDGE) { |
3667 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3668 | if (!(link->eh_context.unloaded_mask & |
3669 | (1 << dev->devno))) | |
3670 | continue; | |
3671 | ||
3672 | ata_eh_park_issue_cmd(dev, 0); | |
3673 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3674 | } | |
3675 | } | |
3676 | ||
9b1e2658 | 3677 | /* the rest */ |
6b7ae954 TH |
3678 | nr_fails = 0; |
3679 | ata_for_each_link(link, ap, PMP_FIRST) { | |
9b1e2658 | 3680 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3681 | |
6b7ae954 TH |
3682 | if (sata_pmp_attached(ap) && ata_is_host_link(link)) |
3683 | goto config_lpm; | |
3684 | ||
9b1e2658 TH |
3685 | /* revalidate existing devices and attach new ones */ |
3686 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3687 | if (rc) |
6b7ae954 | 3688 | goto rest_fail; |
022bdb07 | 3689 | |
633273a3 TH |
3690 | /* if PMP got attached, return, pmp EH will take care of it */ |
3691 | if (link->device->class == ATA_DEV_PMP) { | |
3692 | ehc->i.action = 0; | |
3693 | return 0; | |
3694 | } | |
3695 | ||
9b1e2658 TH |
3696 | /* configure transfer mode if necessary */ |
3697 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3698 | rc = ata_set_mode(link, &dev); | |
3699 | if (rc) | |
6b7ae954 | 3700 | goto rest_fail; |
9b1e2658 TH |
3701 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
3702 | } | |
3703 | ||
11fc33da TH |
3704 | /* If reset has been issued, clear UA to avoid |
3705 | * disrupting the current users of the device. | |
3706 | */ | |
3707 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3708 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3709 | if (dev->class != ATA_DEV_ATAPI) |
3710 | continue; | |
3711 | rc = atapi_eh_clear_ua(dev); | |
3712 | if (rc) | |
6b7ae954 | 3713 | goto rest_fail; |
21334205 AL |
3714 | if (zpodd_dev_enabled(dev)) |
3715 | zpodd_post_poweron(dev); | |
11fc33da TH |
3716 | } |
3717 | } | |
3718 | ||
6013efd8 TH |
3719 | /* retry flush if necessary */ |
3720 | ata_for_each_dev(dev, link, ALL) { | |
9162c657 HR |
3721 | if (dev->class != ATA_DEV_ATA && |
3722 | dev->class != ATA_DEV_ZAC) | |
6013efd8 TH |
3723 | continue; |
3724 | rc = ata_eh_maybe_retry_flush(dev); | |
3725 | if (rc) | |
6b7ae954 | 3726 | goto rest_fail; |
6013efd8 TH |
3727 | } |
3728 | ||
6b7ae954 | 3729 | config_lpm: |
11fc33da | 3730 | /* configure link power saving */ |
6b7ae954 TH |
3731 | if (link->lpm_policy != ap->target_lpm_policy) { |
3732 | rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev); | |
3733 | if (rc) | |
3734 | goto rest_fail; | |
3735 | } | |
ca77329f | 3736 | |
9b1e2658 TH |
3737 | /* this link is okay now */ |
3738 | ehc->i.flags = 0; | |
3739 | continue; | |
022bdb07 | 3740 | |
6b7ae954 TH |
3741 | rest_fail: |
3742 | nr_fails++; | |
3743 | if (dev) | |
3744 | ata_eh_handle_dev_fail(dev, rc); | |
022bdb07 | 3745 | |
b06ce3e5 TH |
3746 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3747 | /* PMP reset requires working host port. | |
3748 | * Can't retry if it's frozen. | |
3749 | */ | |
071f44b1 | 3750 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3751 | goto out; |
9b1e2658 | 3752 | break; |
b06ce3e5 | 3753 | } |
022bdb07 TH |
3754 | } |
3755 | ||
6b7ae954 | 3756 | if (nr_fails) |
9b1e2658 | 3757 | goto retry; |
022bdb07 | 3758 | |
9b1e2658 TH |
3759 | out: |
3760 | if (rc && r_failed_link) | |
3761 | *r_failed_link = link; | |
3762 | ||
022bdb07 TH |
3763 | return rc; |
3764 | } | |
3765 | ||
3766 | /** | |
3767 | * ata_eh_finish - finish up EH | |
3768 | * @ap: host port to finish EH for | |
3769 | * | |
3770 | * Recovery is complete. Clean up EH states and retry or finish | |
3771 | * failed qcs. | |
3772 | * | |
3773 | * LOCKING: | |
3774 | * None. | |
3775 | */ | |
fb7fd614 | 3776 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 | 3777 | { |
258c4e5c | 3778 | struct ata_queued_cmd *qc; |
022bdb07 TH |
3779 | int tag; |
3780 | ||
3781 | /* retry or finish qcs */ | |
258c4e5c | 3782 | ata_qc_for_each_raw(ap, qc, tag) { |
022bdb07 TH |
3783 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
3784 | continue; | |
3785 | ||
3786 | if (qc->err_mask) { | |
3787 | /* FIXME: Once EH migration is complete, | |
3788 | * generate sense data in this function, | |
3789 | * considering both err_mask and tf. | |
3790 | */ | |
03faab78 | 3791 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3792 | ata_eh_qc_retry(qc); |
03faab78 TH |
3793 | else |
3794 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3795 | } else { |
3796 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3797 | ata_eh_qc_complete(qc); | |
3798 | } else { | |
3799 | /* feed zero TF to sense generation */ | |
3800 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3801 | ata_eh_qc_retry(qc); | |
3802 | } | |
3803 | } | |
3804 | } | |
da917d69 TH |
3805 | |
3806 | /* make sure nr_active_links is zero after EH */ | |
3807 | WARN_ON(ap->nr_active_links); | |
3808 | ap->nr_active_links = 0; | |
022bdb07 TH |
3809 | } |
3810 | ||
3811 | /** | |
3812 | * ata_do_eh - do standard error handling | |
3813 | * @ap: host port to handle error for | |
a1efdaba | 3814 | * |
f5914a46 | 3815 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3816 | * @softreset: softreset method (can be NULL) |
3817 | * @hardreset: hardreset method (can be NULL) | |
3818 | * @postreset: postreset method (can be NULL) | |
3819 | * | |
3820 | * Perform standard error handling sequence. | |
3821 | * | |
3822 | * LOCKING: | |
3823 | * Kernel thread context (may sleep). | |
3824 | */ | |
f5914a46 TH |
3825 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3826 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3827 | ata_postreset_fn_t postreset) | |
022bdb07 | 3828 | { |
9b1e2658 TH |
3829 | struct ata_device *dev; |
3830 | int rc; | |
3831 | ||
3832 | ata_eh_autopsy(ap); | |
3833 | ata_eh_report(ap); | |
3834 | ||
3835 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3836 | NULL); | |
3837 | if (rc) { | |
1eca4365 | 3838 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
3839 | ata_dev_disable(dev); |
3840 | } | |
3841 | ||
022bdb07 TH |
3842 | ata_eh_finish(ap); |
3843 | } | |
500530f6 | 3844 | |
a1efdaba TH |
3845 | /** |
3846 | * ata_std_error_handler - standard error handler | |
3847 | * @ap: host port to handle error for | |
3848 | * | |
3849 | * Standard error handler | |
3850 | * | |
3851 | * LOCKING: | |
3852 | * Kernel thread context (may sleep). | |
3853 | */ | |
3854 | void ata_std_error_handler(struct ata_port *ap) | |
3855 | { | |
3856 | struct ata_port_operations *ops = ap->ops; | |
3857 | ata_reset_fn_t hardreset = ops->hardreset; | |
3858 | ||
57c9efdf | 3859 | /* ignore built-in hardreset if SCR access is not available */ |
fe06e5f9 | 3860 | if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) |
a1efdaba TH |
3861 | hardreset = NULL; |
3862 | ||
3863 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
3864 | } | |
a52fbcfc | 3865 | EXPORT_SYMBOL_GPL(ata_std_error_handler); |
a1efdaba | 3866 | |
6ffa01d8 | 3867 | #ifdef CONFIG_PM |
500530f6 TH |
3868 | /** |
3869 | * ata_eh_handle_port_suspend - perform port suspend operation | |
3870 | * @ap: port to suspend | |
3871 | * | |
3872 | * Suspend @ap. | |
3873 | * | |
3874 | * LOCKING: | |
3875 | * Kernel thread context (may sleep). | |
3876 | */ | |
3877 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
3878 | { | |
3879 | unsigned long flags; | |
3880 | int rc = 0; | |
3dc67440 | 3881 | struct ata_device *dev; |
500530f6 TH |
3882 | |
3883 | /* are we suspending? */ | |
3884 | spin_lock_irqsave(ap->lock, flags); | |
3885 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 3886 | ap->pm_mesg.event & PM_EVENT_RESUME) { |
500530f6 TH |
3887 | spin_unlock_irqrestore(ap->lock, flags); |
3888 | return; | |
3889 | } | |
3890 | spin_unlock_irqrestore(ap->lock, flags); | |
3891 | ||
3892 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
3893 | ||
3dc67440 AL |
3894 | /* |
3895 | * If we have a ZPODD attached, check its zero | |
3896 | * power ready status before the port is frozen. | |
a7ff60db | 3897 | * Only needed for runtime suspend. |
3dc67440 | 3898 | */ |
a7ff60db AL |
3899 | if (PMSG_IS_AUTO(ap->pm_mesg)) { |
3900 | ata_for_each_dev(dev, &ap->link, ENABLED) { | |
3901 | if (zpodd_dev_enabled(dev)) | |
3902 | zpodd_on_suspend(dev); | |
3903 | } | |
3dc67440 AL |
3904 | } |
3905 | ||
500530f6 TH |
3906 | /* suspend */ |
3907 | ata_eh_freeze_port(ap); | |
3908 | ||
3909 | if (ap->ops->port_suspend) | |
3910 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
3911 | ||
a7ff60db | 3912 | ata_acpi_set_state(ap, ap->pm_mesg); |
2a7b02ea | 3913 | |
bc6e7c4b | 3914 | /* update the flags */ |
500530f6 TH |
3915 | spin_lock_irqsave(ap->lock, flags); |
3916 | ||
3917 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
3918 | if (rc == 0) | |
3919 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 3920 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
3921 | ata_port_schedule_eh(ap); |
3922 | ||
500530f6 TH |
3923 | spin_unlock_irqrestore(ap->lock, flags); |
3924 | ||
3925 | return; | |
3926 | } | |
3927 | ||
3928 | /** | |
3929 | * ata_eh_handle_port_resume - perform port resume operation | |
3930 | * @ap: port to resume | |
3931 | * | |
3932 | * Resume @ap. | |
3933 | * | |
500530f6 TH |
3934 | * LOCKING: |
3935 | * Kernel thread context (may sleep). | |
3936 | */ | |
3937 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
3938 | { | |
6f9c1ea2 TH |
3939 | struct ata_link *link; |
3940 | struct ata_device *dev; | |
500530f6 | 3941 | unsigned long flags; |
500530f6 TH |
3942 | |
3943 | /* are we resuming? */ | |
3944 | spin_lock_irqsave(ap->lock, flags); | |
3945 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 3946 | !(ap->pm_mesg.event & PM_EVENT_RESUME)) { |
500530f6 TH |
3947 | spin_unlock_irqrestore(ap->lock, flags); |
3948 | return; | |
3949 | } | |
3950 | spin_unlock_irqrestore(ap->lock, flags); | |
3951 | ||
9666f400 | 3952 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 3953 | |
6f9c1ea2 TH |
3954 | /* |
3955 | * Error timestamps are in jiffies which doesn't run while | |
3956 | * suspended and PHY events during resume isn't too uncommon. | |
3957 | * When the two are combined, it can lead to unnecessary speed | |
3958 | * downs if the machine is suspended and resumed repeatedly. | |
3959 | * Clear error history. | |
3960 | */ | |
3961 | ata_for_each_link(link, ap, HOST_FIRST) | |
3962 | ata_for_each_dev(dev, link, ALL) | |
3963 | ata_ering_clear(&dev->ering); | |
3964 | ||
a7ff60db | 3965 | ata_acpi_set_state(ap, ap->pm_mesg); |
bd3adca5 | 3966 | |
500530f6 | 3967 | if (ap->ops->port_resume) |
ae867937 | 3968 | ap->ops->port_resume(ap); |
500530f6 | 3969 | |
6746544c TH |
3970 | /* tell ACPI that we're resuming */ |
3971 | ata_acpi_on_resume(ap); | |
3972 | ||
bc6e7c4b | 3973 | /* update the flags */ |
500530f6 TH |
3974 | spin_lock_irqsave(ap->lock, flags); |
3975 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
500530f6 TH |
3976 | spin_unlock_irqrestore(ap->lock, flags); |
3977 | } | |
6ffa01d8 | 3978 | #endif /* CONFIG_PM */ |