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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); |
71d7b6e5 NC |
154 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, |
155 | struct ata_device **r_failed_dev); | |
6ffa01d8 | 156 | #ifdef CONFIG_PM |
500530f6 TH |
157 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
158 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
159 | #else /* CONFIG_PM */ |
160 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
161 | { } | |
162 | ||
163 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
164 | { } | |
6ffa01d8 | 165 | #endif /* CONFIG_PM */ |
ad9e2762 | 166 | |
0d74d872 MM |
167 | static __printf(2, 0) void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, |
168 | const char *fmt, va_list args) | |
b64bbc39 TH |
169 | { |
170 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
171 | ATA_EH_DESC_LEN - ehi->desc_len, | |
172 | fmt, args); | |
173 | } | |
174 | ||
175 | /** | |
176 | * __ata_ehi_push_desc - push error description without adding separator | |
177 | * @ehi: target EHI | |
178 | * @fmt: printf format string | |
179 | * | |
180 | * Format string according to @fmt and append it to @ehi->desc. | |
181 | * | |
182 | * LOCKING: | |
183 | * spin_lock_irqsave(host lock) | |
184 | */ | |
185 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
186 | { | |
187 | va_list args; | |
188 | ||
189 | va_start(args, fmt); | |
190 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
191 | va_end(args); | |
192 | } | |
a52fbcfc | 193 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
b64bbc39 TH |
194 | |
195 | /** | |
196 | * ata_ehi_push_desc - push error description with separator | |
197 | * @ehi: target EHI | |
198 | * @fmt: printf format string | |
199 | * | |
200 | * Format string according to @fmt and append it to @ehi->desc. | |
201 | * If @ehi->desc is not empty, ", " is added in-between. | |
202 | * | |
203 | * LOCKING: | |
204 | * spin_lock_irqsave(host lock) | |
205 | */ | |
206 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
207 | { | |
208 | va_list args; | |
209 | ||
210 | if (ehi->desc_len) | |
211 | __ata_ehi_push_desc(ehi, ", "); | |
212 | ||
213 | va_start(args, fmt); | |
214 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
215 | va_end(args); | |
216 | } | |
a52fbcfc | 217 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); |
b64bbc39 TH |
218 | |
219 | /** | |
220 | * ata_ehi_clear_desc - clean error description | |
221 | * @ehi: target EHI | |
222 | * | |
223 | * Clear @ehi->desc. | |
224 | * | |
225 | * LOCKING: | |
226 | * spin_lock_irqsave(host lock) | |
227 | */ | |
228 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
229 | { | |
230 | ehi->desc[0] = '\0'; | |
231 | ehi->desc_len = 0; | |
232 | } | |
a52fbcfc | 233 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); |
b64bbc39 | 234 | |
cbcdd875 TH |
235 | /** |
236 | * ata_port_desc - append port description | |
237 | * @ap: target ATA port | |
238 | * @fmt: printf format string | |
239 | * | |
240 | * Format string according to @fmt and append it to port | |
241 | * description. If port description is not empty, " " is added | |
242 | * in-between. This function is to be used while initializing | |
243 | * ata_host. The description is printed on host registration. | |
244 | * | |
245 | * LOCKING: | |
246 | * None. | |
247 | */ | |
248 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
249 | { | |
250 | va_list args; | |
251 | ||
252 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
253 | ||
254 | if (ap->link.eh_info.desc_len) | |
255 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
256 | ||
257 | va_start(args, fmt); | |
258 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
259 | va_end(args); | |
260 | } | |
a52fbcfc | 261 | EXPORT_SYMBOL_GPL(ata_port_desc); |
cbcdd875 TH |
262 | |
263 | #ifdef CONFIG_PCI | |
cbcdd875 TH |
264 | /** |
265 | * ata_port_pbar_desc - append PCI BAR description | |
266 | * @ap: target ATA port | |
267 | * @bar: target PCI BAR | |
268 | * @offset: offset into PCI BAR | |
269 | * @name: name of the area | |
270 | * | |
271 | * If @offset is negative, this function formats a string which | |
272 | * contains the name, address, size and type of the BAR and | |
273 | * appends it to the port description. If @offset is zero or | |
274 | * positive, only name and offsetted address is appended. | |
275 | * | |
276 | * LOCKING: | |
277 | * None. | |
278 | */ | |
279 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
280 | const char *name) | |
281 | { | |
282 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
283 | char *type = ""; | |
284 | unsigned long long start, len; | |
285 | ||
286 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
287 | type = "m"; | |
288 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
289 | type = "i"; | |
290 | ||
291 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
292 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
293 | ||
294 | if (offset < 0) | |
295 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
296 | else | |
e6a73ab1 AM |
297 | ata_port_desc(ap, "%s 0x%llx", name, |
298 | start + (unsigned long long)offset); | |
cbcdd875 | 299 | } |
a52fbcfc | 300 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); |
cbcdd875 TH |
301 | #endif /* CONFIG_PCI */ |
302 | ||
87fbc5a0 TH |
303 | static int ata_lookup_timeout_table(u8 cmd) |
304 | { | |
305 | int i; | |
306 | ||
307 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
308 | const u8 *cur; | |
309 | ||
310 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
311 | if (*cur == cmd) | |
312 | return i; | |
313 | } | |
314 | ||
315 | return -1; | |
316 | } | |
317 | ||
318 | /** | |
319 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
320 | * @dev: target device | |
321 | * @cmd: internal command to be issued | |
322 | * | |
323 | * Determine timeout for internal command @cmd for @dev. | |
324 | * | |
325 | * LOCKING: | |
326 | * EH context. | |
327 | * | |
328 | * RETURNS: | |
329 | * Determined timeout. | |
330 | */ | |
e06233f9 | 331 | unsigned int ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) |
87fbc5a0 TH |
332 | { |
333 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
334 | int ent = ata_lookup_timeout_table(cmd); | |
335 | int idx; | |
336 | ||
337 | if (ent < 0) | |
338 | return ATA_EH_CMD_DFL_TIMEOUT; | |
339 | ||
340 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
341 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
342 | } | |
343 | ||
344 | /** | |
345 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
346 | * @dev: target device | |
347 | * @cmd: internal command which timed out | |
348 | * | |
349 | * Notify EH that internal command @cmd for @dev timed out. This | |
350 | * function should be called only for commands whose timeouts are | |
351 | * determined using ata_internal_cmd_timeout(). | |
352 | * | |
353 | * LOCKING: | |
354 | * EH context. | |
355 | */ | |
356 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
357 | { | |
358 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
359 | int ent = ata_lookup_timeout_table(cmd); | |
360 | int idx; | |
361 | ||
362 | if (ent < 0) | |
363 | return; | |
364 | ||
365 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
e06233f9 | 366 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != UINT_MAX) |
87fbc5a0 TH |
367 | ehc->cmd_timeout_idx[dev->devno][ent]++; |
368 | } | |
369 | ||
3884f7b0 | 370 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
371 | unsigned int err_mask) |
372 | { | |
373 | struct ata_ering_entry *ent; | |
374 | ||
375 | WARN_ON(!err_mask); | |
376 | ||
377 | ering->cursor++; | |
378 | ering->cursor %= ATA_ERING_SIZE; | |
379 | ||
380 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 381 | ent->eflags = eflags; |
0c247c55 TH |
382 | ent->err_mask = err_mask; |
383 | ent->timestamp = get_jiffies_64(); | |
384 | } | |
385 | ||
76326ac1 TH |
386 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
387 | { | |
388 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
389 | ||
390 | if (ent->err_mask) | |
391 | return ent; | |
392 | return NULL; | |
393 | } | |
394 | ||
d9027470 GG |
395 | int ata_ering_map(struct ata_ering *ering, |
396 | int (*map_fn)(struct ata_ering_entry *, void *), | |
397 | void *arg) | |
0c247c55 TH |
398 | { |
399 | int idx, rc = 0; | |
400 | struct ata_ering_entry *ent; | |
401 | ||
402 | idx = ering->cursor; | |
403 | do { | |
404 | ent = &ering->ring[idx]; | |
405 | if (!ent->err_mask) | |
406 | break; | |
407 | rc = map_fn(ent, arg); | |
408 | if (rc) | |
409 | break; | |
410 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
411 | } while (idx != ering->cursor); | |
412 | ||
413 | return rc; | |
414 | } | |
415 | ||
60428407 | 416 | static int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg) |
d9027470 GG |
417 | { |
418 | ent->eflags |= ATA_EFLAG_OLD_ER; | |
419 | return 0; | |
420 | } | |
421 | ||
422 | static void ata_ering_clear(struct ata_ering *ering) | |
423 | { | |
424 | ata_ering_map(ering, ata_ering_clear_cb, NULL); | |
425 | } | |
426 | ||
64f65ca6 TH |
427 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
428 | { | |
9af5c9c9 | 429 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
430 | |
431 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
432 | } | |
433 | ||
f58229f8 | 434 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
435 | struct ata_eh_info *ehi, unsigned int action) |
436 | { | |
f58229f8 | 437 | struct ata_device *tdev; |
af181c2d TH |
438 | |
439 | if (!dev) { | |
440 | ehi->action &= ~action; | |
1eca4365 | 441 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 442 | ehi->dev_action[tdev->devno] &= ~action; |
af181c2d TH |
443 | } else { |
444 | /* doesn't make sense for port-wide EH actions */ | |
445 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
446 | ||
447 | /* break ehi->action into ehi->dev_action */ | |
448 | if (ehi->action & action) { | |
1eca4365 | 449 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
450 | ehi->dev_action[tdev->devno] |= |
451 | ehi->action & action; | |
af181c2d TH |
452 | ehi->action &= ~action; |
453 | } | |
454 | ||
455 | /* turn off the specified per-dev action */ | |
456 | ehi->dev_action[dev->devno] &= ~action; | |
457 | } | |
458 | } | |
459 | ||
c0c362b6 TH |
460 | /** |
461 | * ata_eh_acquire - acquire EH ownership | |
462 | * @ap: ATA port to acquire EH ownership for | |
463 | * | |
464 | * Acquire EH ownership for @ap. This is the basic exclusion | |
465 | * mechanism for ports sharing a host. Only one port hanging off | |
466 | * the same host can claim the ownership of EH. | |
467 | * | |
468 | * LOCKING: | |
469 | * EH context. | |
470 | */ | |
471 | void ata_eh_acquire(struct ata_port *ap) | |
472 | { | |
473 | mutex_lock(&ap->host->eh_mutex); | |
474 | WARN_ON_ONCE(ap->host->eh_owner); | |
475 | ap->host->eh_owner = current; | |
476 | } | |
477 | ||
478 | /** | |
479 | * ata_eh_release - release EH ownership | |
480 | * @ap: ATA port to release EH ownership for | |
481 | * | |
482 | * Release EH ownership for @ap if the caller. The caller must | |
483 | * have acquired EH ownership using ata_eh_acquire() previously. | |
484 | * | |
485 | * LOCKING: | |
486 | * EH context. | |
487 | */ | |
488 | void ata_eh_release(struct ata_port *ap) | |
489 | { | |
490 | WARN_ON_ONCE(ap->host->eh_owner != current); | |
491 | ap->host->eh_owner = NULL; | |
492 | mutex_unlock(&ap->host->eh_mutex); | |
493 | } | |
494 | ||
ece180d1 TH |
495 | static void ata_eh_unload(struct ata_port *ap) |
496 | { | |
497 | struct ata_link *link; | |
498 | struct ata_device *dev; | |
499 | unsigned long flags; | |
500 | ||
501 | /* Restore SControl IPM and SPD for the next driver and | |
502 | * disable attached devices. | |
503 | */ | |
504 | ata_for_each_link(link, ap, PMP_FIRST) { | |
505 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
506 | ata_for_each_dev(dev, link, ALL) | |
507 | ata_dev_disable(dev); | |
508 | } | |
509 | ||
510 | /* freeze and set UNLOADED */ | |
511 | spin_lock_irqsave(ap->lock, flags); | |
512 | ||
513 | ata_port_freeze(ap); /* won't be thawed */ | |
514 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
515 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
516 | ||
517 | spin_unlock_irqrestore(ap->lock, flags); | |
518 | } | |
519 | ||
ece1d636 TH |
520 | /** |
521 | * ata_scsi_error - SCSI layer error handler callback | |
522 | * @host: SCSI host on which error occurred | |
523 | * | |
524 | * Handles SCSI-layer-thrown error events. | |
525 | * | |
526 | * LOCKING: | |
527 | * Inherited from SCSI layer (none, can sleep) | |
528 | * | |
529 | * RETURNS: | |
530 | * Zero. | |
531 | */ | |
381544bb | 532 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 533 | { |
35bb94b1 | 534 | struct ata_port *ap = ata_shost_to_port(host); |
ad9e2762 | 535 | unsigned long flags; |
c34aeebc | 536 | LIST_HEAD(eh_work_q); |
ece1d636 | 537 | |
c34aeebc JB |
538 | spin_lock_irqsave(host->host_lock, flags); |
539 | list_splice_init(&host->eh_cmd_q, &eh_work_q); | |
540 | spin_unlock_irqrestore(host->host_lock, flags); | |
541 | ||
0e0b494c JB |
542 | ata_scsi_cmd_error_handler(host, ap, &eh_work_q); |
543 | ||
544 | /* If we timed raced normal completion and there is nothing to | |
545 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ | |
546 | ata_scsi_port_error_handler(host, ap); | |
547 | ||
548 | /* finish or retry handled scmd's and clean up */ | |
72d8c36e | 549 | WARN_ON(!list_empty(&eh_work_q)); |
0e0b494c | 550 | |
0e0b494c JB |
551 | } |
552 | ||
553 | /** | |
554 | * ata_scsi_cmd_error_handler - error callback for a list of commands | |
555 | * @host: scsi host containing the port | |
556 | * @ap: ATA port within the host | |
557 | * @eh_work_q: list of commands to process | |
558 | * | |
559 | * process the given list of commands and return those finished to the | |
560 | * ap->eh_done_q. This function is the first part of the libata error | |
561 | * handler which processes a given list of failed commands. | |
562 | */ | |
563 | void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, | |
564 | struct list_head *eh_work_q) | |
565 | { | |
566 | int i; | |
567 | unsigned long flags; | |
b83ad9ee WH |
568 | struct scsi_cmnd *scmd, *tmp; |
569 | int nr_timedout = 0; | |
0e0b494c | 570 | |
c429137a TH |
571 | /* make sure sff pio task is not running */ |
572 | ata_sff_flush_pio_task(ap); | |
ece1d636 | 573 | |
b83ad9ee WH |
574 | if (!ap->ops->error_handler) |
575 | return; | |
576 | ||
cca3974e | 577 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 | 578 | |
b83ad9ee WH |
579 | /* |
580 | * For new EH, all qcs are finished in one of three ways - | |
ad9e2762 | 581 | * normal completion, error completion, and SCSI timeout. |
c96f1732 | 582 | * Both completions can race against SCSI timeout. When normal |
ad9e2762 | 583 | * completion wins, the qc never reaches EH. When error |
87629312 | 584 | * completion wins, the qc has ATA_QCFLAG_EH set. |
ad9e2762 TH |
585 | * |
586 | * When SCSI timeout wins, things are a bit more complex. | |
587 | * Normal or error completion can occur after the timeout but | |
588 | * before this point. In such cases, both types of | |
589 | * completions are honored. A scmd is determined to have | |
590 | * timed out iff its associated qc is active and not failed. | |
591 | */ | |
a4f08141 | 592 | spin_lock_irqsave(ap->lock, flags); |
d9027470 | 593 | |
b83ad9ee WH |
594 | /* |
595 | * This must occur under the ap->lock as we don't want | |
596 | * a polled recovery to race the real interrupt handler | |
597 | * | |
598 | * The lost_interrupt handler checks for any completed but | |
599 | * non-notified command and completes much like an IRQ handler. | |
600 | * | |
601 | * We then fall into the error recovery code which will treat | |
602 | * this as if normal completion won the race | |
603 | */ | |
604 | if (ap->ops->lost_interrupt) | |
605 | ap->ops->lost_interrupt(ap); | |
d9027470 | 606 | |
b83ad9ee WH |
607 | list_for_each_entry_safe(scmd, tmp, eh_work_q, eh_entry) { |
608 | struct ata_queued_cmd *qc; | |
ad9e2762 | 609 | |
b83ad9ee WH |
610 | ata_qc_for_each_raw(ap, qc, i) { |
611 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
612 | qc->scsicmd == scmd) | |
613 | break; | |
614 | } | |
ad9e2762 | 615 | |
b83ad9ee WH |
616 | if (i < ATA_MAX_QUEUE) { |
617 | /* the scmd has an associated qc */ | |
87629312 | 618 | if (!(qc->flags & ATA_QCFLAG_EH)) { |
b83ad9ee WH |
619 | /* which hasn't failed yet, timeout */ |
620 | qc->err_mask |= AC_ERR_TIMEOUT; | |
87629312 | 621 | qc->flags |= ATA_QCFLAG_EH; |
b83ad9ee | 622 | nr_timedout++; |
ad9e2762 | 623 | } |
b83ad9ee WH |
624 | } else { |
625 | /* Normal completion occurred after | |
626 | * SCSI timeout but before this point. | |
627 | * Successfully complete it. | |
628 | */ | |
629 | scmd->retries = scmd->allowed; | |
630 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
ad9e2762 | 631 | } |
b83ad9ee | 632 | } |
ad9e2762 | 633 | |
b83ad9ee WH |
634 | /* |
635 | * If we have timed out qcs. They belong to EH from | |
636 | * this point but the state of the controller is | |
637 | * unknown. Freeze the port to make sure the IRQ | |
638 | * handler doesn't diddle with those qcs. This must | |
87629312 | 639 | * be done atomically w.r.t. setting ATA_QCFLAG_EH. |
b83ad9ee WH |
640 | */ |
641 | if (nr_timedout) | |
642 | __ata_port_freeze(ap); | |
ad9e2762 | 643 | |
b83ad9ee WH |
644 | /* initialize eh_tries */ |
645 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
a1e10f7e | 646 | |
a4f08141 | 647 | spin_unlock_irqrestore(ap->lock, flags); |
0e0b494c JB |
648 | } |
649 | EXPORT_SYMBOL(ata_scsi_cmd_error_handler); | |
650 | ||
651 | /** | |
652 | * ata_scsi_port_error_handler - recover the port after the commands | |
653 | * @host: SCSI host containing the port | |
654 | * @ap: the ATA port | |
655 | * | |
656 | * Handle the recovery of the port @ap after all the commands | |
657 | * have been recovered. | |
658 | */ | |
659 | void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap) | |
660 | { | |
661 | unsigned long flags; | |
ad9e2762 | 662 | |
ad9e2762 TH |
663 | /* invoke error handler */ |
664 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
665 | struct ata_link *link; |
666 | ||
c0c362b6 TH |
667 | /* acquire EH ownership */ |
668 | ata_eh_acquire(ap); | |
669 | repeat: | |
5ddf24c5 TH |
670 | /* kill fast drain timer */ |
671 | del_timer_sync(&ap->fastdrain_timer); | |
672 | ||
500530f6 TH |
673 | /* process port resume request */ |
674 | ata_eh_handle_port_resume(ap); | |
675 | ||
f3e81b19 | 676 | /* fetch & clear EH info */ |
e30349d2 | 677 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 678 | |
1eca4365 | 679 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
680 | struct ata_eh_context *ehc = &link->eh_context; |
681 | struct ata_device *dev; | |
682 | ||
cf1b86c8 TH |
683 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
684 | link->eh_context.i = link->eh_info; | |
685 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 686 | |
1eca4365 | 687 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
688 | int devno = dev->devno; |
689 | ||
690 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
691 | if (ata_ncq_enabled(dev)) | |
692 | ehc->saved_ncq_enabled |= 1 << devno; | |
693 | } | |
cf1b86c8 | 694 | } |
f3e81b19 | 695 | |
b51e9e5d TH |
696 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
697 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 698 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 699 | |
e30349d2 | 700 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 701 | |
500530f6 TH |
702 | /* invoke EH, skip if unloading or suspended */ |
703 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 704 | ap->ops->error_handler(ap); |
ece180d1 TH |
705 | else { |
706 | /* if unloading, commence suicide */ | |
707 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
708 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
709 | ata_eh_unload(ap); | |
720ba126 | 710 | ata_eh_finish(ap); |
ece180d1 | 711 | } |
ad9e2762 | 712 | |
500530f6 TH |
713 | /* process port suspend request */ |
714 | ata_eh_handle_port_suspend(ap); | |
715 | ||
25985edc | 716 | /* Exception might have happened after ->error_handler |
ad9e2762 TH |
717 | * recovered the port but before this point. Repeat |
718 | * EH in such case. | |
719 | */ | |
e30349d2 | 720 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 721 | |
b51e9e5d | 722 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 723 | if (--ap->eh_tries) { |
e30349d2 | 724 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
725 | goto repeat; |
726 | } | |
a9a79dfe JP |
727 | ata_port_err(ap, |
728 | "EH pending after %d tries, giving up\n", | |
729 | ATA_EH_MAX_TRIES); | |
914616a3 | 730 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
731 | } |
732 | ||
f3e81b19 | 733 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 734 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 735 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 736 | |
e4a9c373 DW |
737 | /* end eh (clear host_eh_scheduled) while holding |
738 | * ap->lock such that if exception occurs after this | |
739 | * point but before EH completion, SCSI midlayer will | |
ad9e2762 TH |
740 | * re-initiate EH. |
741 | */ | |
e4a9c373 | 742 | ap->ops->end_eh(ap); |
ad9e2762 | 743 | |
e30349d2 | 744 | spin_unlock_irqrestore(ap->lock, flags); |
c0c362b6 | 745 | ata_eh_release(ap); |
ad9e2762 | 746 | } else { |
9af5c9c9 | 747 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
748 | ap->ops->eng_timeout(ap); |
749 | } | |
ece1d636 | 750 | |
ece1d636 TH |
751 | scsi_eh_flush_done_q(&ap->eh_done_q); |
752 | ||
ad9e2762 | 753 | /* clean up */ |
e30349d2 | 754 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 755 | |
1cdaf534 | 756 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 757 | ap->pflags &= ~ATA_PFLAG_LOADING; |
6f54120e JY |
758 | else if ((ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) && |
759 | !(ap->flags & ATA_FLAG_SAS_HOST)) | |
ad72cf98 | 760 | schedule_delayed_work(&ap->hotplug_task, 0); |
1cdaf534 TH |
761 | |
762 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
a9a79dfe | 763 | ata_port_info(ap, "EH complete\n"); |
580b2102 | 764 | |
b51e9e5d | 765 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 766 | |
c6cf9e99 | 767 | /* tell wait_eh that we're done */ |
b51e9e5d | 768 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
769 | wake_up_all(&ap->eh_wait_q); |
770 | ||
e30349d2 | 771 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 772 | } |
0e0b494c | 773 | EXPORT_SYMBOL_GPL(ata_scsi_port_error_handler); |
ece1d636 | 774 | |
c6cf9e99 TH |
775 | /** |
776 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
777 | * @ap: Port to wait EH for | |
778 | * | |
779 | * Wait until the currently pending EH is complete. | |
780 | * | |
781 | * LOCKING: | |
782 | * Kernel thread context (may sleep). | |
783 | */ | |
784 | void ata_port_wait_eh(struct ata_port *ap) | |
785 | { | |
786 | unsigned long flags; | |
787 | DEFINE_WAIT(wait); | |
788 | ||
789 | retry: | |
ba6a1308 | 790 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 791 | |
b51e9e5d | 792 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 793 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 794 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 795 | schedule(); |
ba6a1308 | 796 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 797 | } |
0a1b622e | 798 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 799 | |
ba6a1308 | 800 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
801 | |
802 | /* make sure SCSI EH is complete */ | |
cca3974e | 803 | if (scsi_host_in_recovery(ap->scsi_host)) { |
97750ceb | 804 | ata_msleep(ap, 10); |
c6cf9e99 TH |
805 | goto retry; |
806 | } | |
807 | } | |
81c757bc | 808 | EXPORT_SYMBOL_GPL(ata_port_wait_eh); |
c6cf9e99 | 809 | |
afae461a | 810 | static unsigned int ata_eh_nr_in_flight(struct ata_port *ap) |
5ddf24c5 | 811 | { |
258c4e5c | 812 | struct ata_queued_cmd *qc; |
5ddf24c5 | 813 | unsigned int tag; |
afae461a | 814 | unsigned int nr = 0; |
5ddf24c5 TH |
815 | |
816 | /* count only non-internal commands */ | |
258c4e5c JA |
817 | ata_qc_for_each(ap, qc, tag) { |
818 | if (qc) | |
5ddf24c5 | 819 | nr++; |
9d207acc | 820 | } |
5ddf24c5 TH |
821 | |
822 | return nr; | |
823 | } | |
824 | ||
b93ab338 | 825 | void ata_eh_fastdrain_timerfn(struct timer_list *t) |
5ddf24c5 | 826 | { |
b93ab338 | 827 | struct ata_port *ap = from_timer(ap, t, fastdrain_timer); |
5ddf24c5 | 828 | unsigned long flags; |
afae461a | 829 | unsigned int cnt; |
5ddf24c5 TH |
830 | |
831 | spin_lock_irqsave(ap->lock, flags); | |
832 | ||
833 | cnt = ata_eh_nr_in_flight(ap); | |
834 | ||
835 | /* are we done? */ | |
836 | if (!cnt) | |
837 | goto out_unlock; | |
838 | ||
839 | if (cnt == ap->fastdrain_cnt) { | |
258c4e5c | 840 | struct ata_queued_cmd *qc; |
5ddf24c5 TH |
841 | unsigned int tag; |
842 | ||
843 | /* No progress during the last interval, tag all | |
844 | * in-flight qcs as timed out and freeze the port. | |
845 | */ | |
258c4e5c | 846 | ata_qc_for_each(ap, qc, tag) { |
5ddf24c5 TH |
847 | if (qc) |
848 | qc->err_mask |= AC_ERR_TIMEOUT; | |
849 | } | |
850 | ||
851 | ata_port_freeze(ap); | |
852 | } else { | |
853 | /* some qcs have finished, give it another chance */ | |
854 | ap->fastdrain_cnt = cnt; | |
855 | ap->fastdrain_timer.expires = | |
341c2c95 | 856 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
857 | add_timer(&ap->fastdrain_timer); |
858 | } | |
859 | ||
860 | out_unlock: | |
861 | spin_unlock_irqrestore(ap->lock, flags); | |
862 | } | |
863 | ||
864 | /** | |
865 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
866 | * @ap: target ATA port | |
867 | * @fastdrain: activate fast drain | |
868 | * | |
869 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
870 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
871 | * that EH kicks in in timely manner. | |
872 | * | |
873 | * LOCKING: | |
874 | * spin_lock_irqsave(host lock) | |
875 | */ | |
876 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
877 | { | |
afae461a | 878 | unsigned int cnt; |
5ddf24c5 TH |
879 | |
880 | /* already scheduled? */ | |
881 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
882 | return; | |
883 | ||
884 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
885 | ||
886 | if (!fastdrain) | |
887 | return; | |
888 | ||
889 | /* do we have in-flight qcs? */ | |
890 | cnt = ata_eh_nr_in_flight(ap); | |
891 | if (!cnt) | |
892 | return; | |
893 | ||
894 | /* activate fast drain */ | |
895 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
896 | ap->fastdrain_timer.expires = |
897 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
898 | add_timer(&ap->fastdrain_timer); |
899 | } | |
900 | ||
f686bcb8 TH |
901 | /** |
902 | * ata_qc_schedule_eh - schedule qc for error handling | |
903 | * @qc: command to schedule error handling for | |
904 | * | |
905 | * Schedule error handling for @qc. EH will kick in as soon as | |
906 | * other commands are drained. | |
907 | * | |
908 | * LOCKING: | |
cca3974e | 909 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
910 | */ |
911 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
912 | { | |
913 | struct ata_port *ap = qc->ap; | |
914 | ||
915 | WARN_ON(!ap->ops->error_handler); | |
916 | ||
87629312 | 917 | qc->flags |= ATA_QCFLAG_EH; |
5ddf24c5 | 918 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
919 | |
920 | /* The following will fail if timeout has already expired. | |
921 | * ata_scsi_error() takes care of such scmds on EH entry. | |
87629312 | 922 | * Note that ATA_QCFLAG_EH is unconditionally set after |
f686bcb8 TH |
923 | * this function completes. |
924 | */ | |
c8329cd5 | 925 | blk_abort_request(scsi_cmd_to_rq(qc->scsicmd)); |
f686bcb8 TH |
926 | } |
927 | ||
7b70fc03 | 928 | /** |
e4a9c373 DW |
929 | * ata_std_sched_eh - non-libsas ata_ports issue eh with this common routine |
930 | * @ap: ATA port to schedule EH for | |
7b70fc03 | 931 | * |
e4a9c373 | 932 | * LOCKING: inherited from ata_port_schedule_eh |
cca3974e | 933 | * spin_lock_irqsave(host lock) |
7b70fc03 | 934 | */ |
e4a9c373 | 935 | void ata_std_sched_eh(struct ata_port *ap) |
7b70fc03 TH |
936 | { |
937 | WARN_ON(!ap->ops->error_handler); | |
938 | ||
f4d6d004 TH |
939 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
940 | return; | |
941 | ||
5ddf24c5 | 942 | ata_eh_set_pending(ap, 1); |
cca3974e | 943 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 | 944 | |
c318458c | 945 | trace_ata_std_sched_eh(ap); |
7b70fc03 | 946 | } |
e4a9c373 DW |
947 | EXPORT_SYMBOL_GPL(ata_std_sched_eh); |
948 | ||
949 | /** | |
950 | * ata_std_end_eh - non-libsas ata_ports complete eh with this common routine | |
951 | * @ap: ATA port to end EH for | |
952 | * | |
953 | * In the libata object model there is a 1:1 mapping of ata_port to | |
954 | * shost, so host fields can be directly manipulated under ap->lock, in | |
955 | * the libsas case we need to hold a lock at the ha->level to coordinate | |
956 | * these events. | |
957 | * | |
958 | * LOCKING: | |
959 | * spin_lock_irqsave(host lock) | |
960 | */ | |
961 | void ata_std_end_eh(struct ata_port *ap) | |
962 | { | |
963 | struct Scsi_Host *host = ap->scsi_host; | |
964 | ||
965 | host->host_eh_scheduled = 0; | |
966 | } | |
967 | EXPORT_SYMBOL(ata_std_end_eh); | |
968 | ||
969 | ||
970 | /** | |
971 | * ata_port_schedule_eh - schedule error handling without a qc | |
972 | * @ap: ATA port to schedule EH for | |
973 | * | |
974 | * Schedule error handling for @ap. EH will kick in as soon as | |
975 | * all commands are drained. | |
976 | * | |
977 | * LOCKING: | |
978 | * spin_lock_irqsave(host lock) | |
979 | */ | |
980 | void ata_port_schedule_eh(struct ata_port *ap) | |
981 | { | |
982 | /* see: ata_std_sched_eh, unless you know better */ | |
983 | ap->ops->sched_eh(ap); | |
984 | } | |
a52fbcfc | 985 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
7b70fc03 | 986 | |
dbd82616 | 987 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 | 988 | { |
258c4e5c | 989 | struct ata_queued_cmd *qc; |
7b70fc03 TH |
990 | int tag, nr_aborted = 0; |
991 | ||
992 | WARN_ON(!ap->ops->error_handler); | |
993 | ||
5ddf24c5 TH |
994 | /* we're gonna abort all commands, no need for fast drain */ |
995 | ata_eh_set_pending(ap, 0); | |
996 | ||
28361c40 | 997 | /* include internal tag in iteration */ |
258c4e5c | 998 | ata_qc_for_each_with_internal(ap, qc, tag) { |
dbd82616 | 999 | if (qc && (!link || qc->dev->link == link)) { |
87629312 | 1000 | qc->flags |= ATA_QCFLAG_EH; |
7b70fc03 TH |
1001 | ata_qc_complete(qc); |
1002 | nr_aborted++; | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | if (!nr_aborted) | |
1007 | ata_port_schedule_eh(ap); | |
1008 | ||
1009 | return nr_aborted; | |
1010 | } | |
1011 | ||
dbd82616 TH |
1012 | /** |
1013 | * ata_link_abort - abort all qc's on the link | |
1014 | * @link: ATA link to abort qc's for | |
1015 | * | |
1016 | * Abort all active qc's active on @link and schedule EH. | |
1017 | * | |
1018 | * LOCKING: | |
1019 | * spin_lock_irqsave(host lock) | |
1020 | * | |
1021 | * RETURNS: | |
1022 | * Number of aborted qc's. | |
1023 | */ | |
1024 | int ata_link_abort(struct ata_link *link) | |
1025 | { | |
1026 | return ata_do_link_abort(link->ap, link); | |
1027 | } | |
a52fbcfc | 1028 | EXPORT_SYMBOL_GPL(ata_link_abort); |
dbd82616 TH |
1029 | |
1030 | /** | |
1031 | * ata_port_abort - abort all qc's on the port | |
1032 | * @ap: ATA port to abort qc's for | |
1033 | * | |
1034 | * Abort all active qc's of @ap and schedule EH. | |
1035 | * | |
1036 | * LOCKING: | |
1037 | * spin_lock_irqsave(host_set lock) | |
1038 | * | |
1039 | * RETURNS: | |
1040 | * Number of aborted qc's. | |
1041 | */ | |
1042 | int ata_port_abort(struct ata_port *ap) | |
1043 | { | |
1044 | return ata_do_link_abort(ap, NULL); | |
1045 | } | |
a52fbcfc | 1046 | EXPORT_SYMBOL_GPL(ata_port_abort); |
dbd82616 | 1047 | |
e3180499 TH |
1048 | /** |
1049 | * __ata_port_freeze - freeze port | |
1050 | * @ap: ATA port to freeze | |
1051 | * | |
1052 | * This function is called when HSM violation or some other | |
1053 | * condition disrupts normal operation of the port. Frozen port | |
1054 | * is not allowed to perform any operation until the port is | |
1055 | * thawed, which usually follows a successful reset. | |
1056 | * | |
1057 | * ap->ops->freeze() callback can be used for freezing the port | |
1058 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
1059 | * port cannot be frozen hardware-wise, the interrupt handler | |
1060 | * must ack and clear interrupts unconditionally while the port | |
1061 | * is frozen. | |
1062 | * | |
1063 | * LOCKING: | |
cca3974e | 1064 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1065 | */ |
1066 | static void __ata_port_freeze(struct ata_port *ap) | |
1067 | { | |
1068 | WARN_ON(!ap->ops->error_handler); | |
1069 | ||
1070 | if (ap->ops->freeze) | |
1071 | ap->ops->freeze(ap); | |
1072 | ||
b51e9e5d | 1073 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 1074 | |
c318458c | 1075 | trace_ata_port_freeze(ap); |
e3180499 TH |
1076 | } |
1077 | ||
1078 | /** | |
1079 | * ata_port_freeze - abort & freeze port | |
1080 | * @ap: ATA port to freeze | |
1081 | * | |
54c38444 JG |
1082 | * Abort and freeze @ap. The freeze operation must be called |
1083 | * first, because some hardware requires special operations | |
1084 | * before the taskfile registers are accessible. | |
e3180499 TH |
1085 | * |
1086 | * LOCKING: | |
cca3974e | 1087 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1088 | * |
1089 | * RETURNS: | |
1090 | * Number of aborted commands. | |
1091 | */ | |
1092 | int ata_port_freeze(struct ata_port *ap) | |
1093 | { | |
e3180499 TH |
1094 | WARN_ON(!ap->ops->error_handler); |
1095 | ||
e3180499 TH |
1096 | __ata_port_freeze(ap); |
1097 | ||
cb6e73aa | 1098 | return ata_port_abort(ap); |
e3180499 | 1099 | } |
a52fbcfc | 1100 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
e3180499 TH |
1101 | |
1102 | /** | |
1103 | * ata_eh_freeze_port - EH helper to freeze port | |
1104 | * @ap: ATA port to freeze | |
1105 | * | |
1106 | * Freeze @ap. | |
1107 | * | |
1108 | * LOCKING: | |
1109 | * None. | |
1110 | */ | |
1111 | void ata_eh_freeze_port(struct ata_port *ap) | |
1112 | { | |
1113 | unsigned long flags; | |
1114 | ||
1115 | if (!ap->ops->error_handler) | |
1116 | return; | |
1117 | ||
ba6a1308 | 1118 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1119 | __ata_port_freeze(ap); |
ba6a1308 | 1120 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1121 | } |
a52fbcfc | 1122 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
e3180499 TH |
1123 | |
1124 | /** | |
94bd5719 | 1125 | * ata_eh_thaw_port - EH helper to thaw port |
e3180499 TH |
1126 | * @ap: ATA port to thaw |
1127 | * | |
1128 | * Thaw frozen port @ap. | |
1129 | * | |
1130 | * LOCKING: | |
1131 | * None. | |
1132 | */ | |
1133 | void ata_eh_thaw_port(struct ata_port *ap) | |
1134 | { | |
1135 | unsigned long flags; | |
1136 | ||
1137 | if (!ap->ops->error_handler) | |
1138 | return; | |
1139 | ||
ba6a1308 | 1140 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1141 | |
b51e9e5d | 1142 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1143 | |
1144 | if (ap->ops->thaw) | |
1145 | ap->ops->thaw(ap); | |
1146 | ||
ba6a1308 | 1147 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1148 | |
c318458c | 1149 | trace_ata_port_thaw(ap); |
e3180499 TH |
1150 | } |
1151 | ||
ece1d636 TH |
1152 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1153 | { | |
1154 | /* nada */ | |
1155 | } | |
1156 | ||
1157 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1158 | { | |
1159 | struct ata_port *ap = qc->ap; | |
1160 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1161 | unsigned long flags; | |
1162 | ||
ba6a1308 | 1163 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1164 | qc->scsidone = ata_eh_scsidone; |
1165 | __ata_qc_complete(qc); | |
1166 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1167 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1168 | |
1169 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1170 | } | |
1171 | ||
1172 | /** | |
1173 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1174 | * @qc: Command to complete | |
1175 | * | |
1176 | * Indicate to the mid and upper layers that an ATA command has | |
1177 | * completed. To be used from EH. | |
1178 | */ | |
1179 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1180 | { | |
1181 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1182 | scmd->retries = scmd->allowed; | |
1183 | __ata_eh_qc_complete(qc); | |
1184 | } | |
1185 | ||
1186 | /** | |
1187 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1188 | * @qc: Command to retry | |
1189 | * | |
1190 | * Indicate to the mid and upper layers that an ATA command | |
1191 | * should be retried. To be used from EH. | |
1192 | * | |
1193 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
f13e2201 | 1194 | * scmd->allowed is incremented for commands which get retried |
ece1d636 TH |
1195 | * due to unrelated failures (qc->err_mask is zero). |
1196 | */ | |
1197 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1198 | { | |
1199 | struct scsi_cmnd *scmd = qc->scsicmd; | |
f13e2201 GG |
1200 | if (!qc->err_mask) |
1201 | scmd->allowed++; | |
ece1d636 TH |
1202 | __ata_eh_qc_complete(qc); |
1203 | } | |
022bdb07 | 1204 | |
678afac6 TH |
1205 | /** |
1206 | * ata_dev_disable - disable ATA device | |
1207 | * @dev: ATA device to disable | |
1208 | * | |
1209 | * Disable @dev. | |
1210 | * | |
1211 | * Locking: | |
1212 | * EH context. | |
1213 | */ | |
1214 | void ata_dev_disable(struct ata_device *dev) | |
1215 | { | |
1216 | if (!ata_dev_enabled(dev)) | |
1217 | return; | |
1218 | ||
1c95a27c | 1219 | ata_dev_warn(dev, "disable device\n"); |
678afac6 TH |
1220 | ata_acpi_on_disable(dev); |
1221 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1222 | dev->class++; | |
99cf610a TH |
1223 | |
1224 | /* From now till the next successful probe, ering is used to | |
1225 | * track probe failures. Clear accumulated device error info. | |
1226 | */ | |
1227 | ata_ering_clear(&dev->ering); | |
678afac6 | 1228 | } |
a52fbcfc | 1229 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
678afac6 | 1230 | |
0ea035a3 TH |
1231 | /** |
1232 | * ata_eh_detach_dev - detach ATA device | |
1233 | * @dev: ATA device to detach | |
1234 | * | |
1235 | * Detach @dev. | |
1236 | * | |
1237 | * LOCKING: | |
1238 | * None. | |
1239 | */ | |
fb7fd614 | 1240 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1241 | { |
f58229f8 TH |
1242 | struct ata_link *link = dev->link; |
1243 | struct ata_port *ap = link->ap; | |
90484ebf | 1244 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1245 | unsigned long flags; |
1246 | ||
1247 | ata_dev_disable(dev); | |
1248 | ||
ba6a1308 | 1249 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1250 | |
1251 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1252 | ||
1253 | if (ata_scsi_offline_dev(dev)) { | |
1254 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1255 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1256 | } |
1257 | ||
90484ebf | 1258 | /* clear per-dev EH info */ |
f58229f8 TH |
1259 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1260 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1261 | ehc->saved_xfer_mode[dev->devno] = 0; |
1262 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1263 | |
ba6a1308 | 1264 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1265 | } |
1266 | ||
022bdb07 TH |
1267 | /** |
1268 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1269 | * @link: target ATA link |
47005f25 | 1270 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1271 | * @action: action about to be performed |
1272 | * | |
1273 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1274 | * in @link->eh_info such that eh actions are not unnecessarily |
1275 | * repeated. | |
022bdb07 TH |
1276 | * |
1277 | * LOCKING: | |
1278 | * None. | |
1279 | */ | |
fb7fd614 TH |
1280 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1281 | unsigned int action) | |
022bdb07 | 1282 | { |
955e57df TH |
1283 | struct ata_port *ap = link->ap; |
1284 | struct ata_eh_info *ehi = &link->eh_info; | |
1285 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1286 | unsigned long flags; |
1287 | ||
c318458c HR |
1288 | trace_ata_eh_about_to_do(link, dev ? dev->devno : 0, action); |
1289 | ||
ba6a1308 | 1290 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1291 | |
955e57df | 1292 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1293 | |
a568d1d2 TH |
1294 | /* About to take EH action, set RECOVERED. Ignore actions on |
1295 | * slave links as master will do them again. | |
1296 | */ | |
1297 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1298 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1299 | ||
ba6a1308 | 1300 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1301 | } |
1302 | ||
47005f25 TH |
1303 | /** |
1304 | * ata_eh_done - EH action complete | |
2f60e1ab | 1305 | * @link: ATA link for which EH actions are complete |
47005f25 TH |
1306 | * @dev: target ATA dev for per-dev action (can be NULL) |
1307 | * @action: action just completed | |
1308 | * | |
1309 | * Called right after performing EH actions to clear related bits | |
955e57df | 1310 | * in @link->eh_context. |
47005f25 TH |
1311 | * |
1312 | * LOCKING: | |
1313 | * None. | |
1314 | */ | |
fb7fd614 TH |
1315 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1316 | unsigned int action) | |
47005f25 | 1317 | { |
955e57df | 1318 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1319 | |
c318458c HR |
1320 | trace_ata_eh_done(link, dev ? dev->devno : 0, action); |
1321 | ||
955e57df | 1322 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1323 | } |
1324 | ||
022bdb07 TH |
1325 | /** |
1326 | * ata_err_string - convert err_mask to descriptive string | |
1327 | * @err_mask: error mask to convert to string | |
1328 | * | |
1329 | * Convert @err_mask to descriptive string. Errors are | |
1330 | * prioritized according to severity and only the most severe | |
1331 | * error is reported. | |
1332 | * | |
1333 | * LOCKING: | |
1334 | * None. | |
1335 | * | |
1336 | * RETURNS: | |
1337 | * Descriptive string for @err_mask | |
1338 | */ | |
2dcb407e | 1339 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1340 | { |
1341 | if (err_mask & AC_ERR_HOST_BUS) | |
1342 | return "host bus error"; | |
1343 | if (err_mask & AC_ERR_ATA_BUS) | |
1344 | return "ATA bus error"; | |
1345 | if (err_mask & AC_ERR_TIMEOUT) | |
1346 | return "timeout"; | |
1347 | if (err_mask & AC_ERR_HSM) | |
1348 | return "HSM violation"; | |
1349 | if (err_mask & AC_ERR_SYSTEM) | |
1350 | return "internal error"; | |
1351 | if (err_mask & AC_ERR_MEDIA) | |
1352 | return "media error"; | |
1353 | if (err_mask & AC_ERR_INVALID) | |
1354 | return "invalid argument"; | |
1355 | if (err_mask & AC_ERR_DEV) | |
1356 | return "device error"; | |
54fb131b DLM |
1357 | if (err_mask & AC_ERR_NCQ) |
1358 | return "NCQ error"; | |
1359 | if (err_mask & AC_ERR_NODEV_HINT) | |
1360 | return "Polling detection error"; | |
022bdb07 TH |
1361 | return "unknown error"; |
1362 | } | |
1363 | ||
11fc33da TH |
1364 | /** |
1365 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1366 | * @dev: target ATAPI device | |
1367 | * @r_sense_key: out parameter for sense_key | |
1368 | * | |
1369 | * Perform ATAPI TEST_UNIT_READY. | |
1370 | * | |
1371 | * LOCKING: | |
1372 | * EH context (may sleep). | |
1373 | * | |
1374 | * RETURNS: | |
1375 | * 0 on success, AC_ERR_* mask on failure. | |
1376 | */ | |
3dc67440 | 1377 | unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) |
11fc33da TH |
1378 | { |
1379 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1380 | struct ata_taskfile tf; | |
1381 | unsigned int err_mask; | |
1382 | ||
1383 | ata_tf_init(dev, &tf); | |
1384 | ||
1385 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1386 | tf.command = ATA_CMD_PACKET; | |
1387 | tf.protocol = ATAPI_PROT_NODATA; | |
1388 | ||
1389 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1390 | if (err_mask == AC_ERR_DEV) | |
efcef265 | 1391 | *r_sense_key = tf.error >> 4; |
11fc33da TH |
1392 | return err_mask; |
1393 | } | |
1394 | ||
e87fd28c HR |
1395 | /** |
1396 | * ata_eh_request_sense - perform REQUEST_SENSE_DATA_EXT | |
2f60e1ab | 1397 | * @qc: qc to perform REQUEST_SENSE_SENSE_DATA_EXT to |
e87fd28c HR |
1398 | * |
1399 | * Perform REQUEST_SENSE_DATA_EXT after the device reported CHECK | |
1400 | * SENSE. This function is an EH helper. | |
1401 | * | |
1402 | * LOCKING: | |
1403 | * Kernel thread context (may sleep). | |
24aeebbf NC |
1404 | * |
1405 | * RETURNS: | |
1406 | * true if sense data could be fetched, false otherwise. | |
e87fd28c | 1407 | */ |
24aeebbf | 1408 | static bool ata_eh_request_sense(struct ata_queued_cmd *qc) |
e87fd28c | 1409 | { |
b46c760e | 1410 | struct scsi_cmnd *cmd = qc->scsicmd; |
e87fd28c HR |
1411 | struct ata_device *dev = qc->dev; |
1412 | struct ata_taskfile tf; | |
1413 | unsigned int err_mask; | |
1414 | ||
4cb7c6f1 | 1415 | if (ata_port_is_frozen(qc->ap)) { |
e87fd28c | 1416 | ata_dev_warn(dev, "sense data available but port frozen\n"); |
24aeebbf | 1417 | return false; |
e87fd28c HR |
1418 | } |
1419 | ||
e87fd28c HR |
1420 | if (!ata_id_sense_reporting_enabled(dev->id)) { |
1421 | ata_dev_warn(qc->dev, "sense data reporting disabled\n"); | |
24aeebbf | 1422 | return false; |
e87fd28c HR |
1423 | } |
1424 | ||
e87fd28c HR |
1425 | ata_tf_init(dev, &tf); |
1426 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1427 | tf.flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
1428 | tf.command = ATA_CMD_REQ_SENSE_DATA; | |
1429 | tf.protocol = ATA_PROT_NODATA; | |
1430 | ||
1431 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
1432 | /* Ignore err_mask; ATA_ERR might be set */ | |
efcef265 | 1433 | if (tf.status & ATA_SENSE) { |
4b89ad8e | 1434 | if (ata_scsi_sense_is_valid(tf.lbah, tf.lbam, tf.lbal)) { |
24aeebbf NC |
1435 | /* Set sense without also setting scsicmd->result */ |
1436 | scsi_build_sense_buffer(dev->flags & ATA_DFLAG_D_SENSE, | |
1437 | cmd->sense_buffer, tf.lbah, | |
1438 | tf.lbam, tf.lbal); | |
4b89ad8e | 1439 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
24aeebbf | 1440 | return true; |
4b89ad8e | 1441 | } |
e87fd28c HR |
1442 | } else { |
1443 | ata_dev_warn(dev, "request sense failed stat %02x emask %x\n", | |
efcef265 | 1444 | tf.status, err_mask); |
e87fd28c | 1445 | } |
24aeebbf NC |
1446 | |
1447 | return false; | |
e87fd28c HR |
1448 | } |
1449 | ||
022bdb07 TH |
1450 | /** |
1451 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1452 | * @dev: device to perform REQUEST_SENSE to | |
1453 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1454 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1455 | * |
1456 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1457 | * SENSE. This function is EH helper. | |
1458 | * | |
1459 | * LOCKING: | |
1460 | * Kernel thread context (may sleep). | |
1461 | * | |
1462 | * RETURNS: | |
1463 | * 0 on success, AC_ERR_* mask on failure | |
1464 | */ | |
3dc67440 | 1465 | unsigned int atapi_eh_request_sense(struct ata_device *dev, |
3eabddb8 | 1466 | u8 *sense_buf, u8 dfl_sense_key) |
022bdb07 | 1467 | { |
3eabddb8 TH |
1468 | u8 cdb[ATAPI_CDB_LEN] = |
1469 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1470 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1471 | struct ata_taskfile tf; |
022bdb07 | 1472 | |
022bdb07 TH |
1473 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
1474 | ||
56287768 AL |
1475 | /* initialize sense_buf with the error register, |
1476 | * for the case where they are -not- overwritten | |
1477 | */ | |
022bdb07 | 1478 | sense_buf[0] = 0x70; |
3eabddb8 | 1479 | sense_buf[2] = dfl_sense_key; |
56287768 | 1480 | |
a617c09f | 1481 | /* some devices time out if garbage left in tf */ |
56287768 | 1482 | ata_tf_init(dev, &tf); |
022bdb07 | 1483 | |
022bdb07 TH |
1484 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1485 | tf.command = ATA_CMD_PACKET; | |
1486 | ||
1487 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1488 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1489 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1490 | tf.feature |= ATAPI_PKT_DMA; |
1491 | } else { | |
0dc36888 | 1492 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1493 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1494 | tf.lbah = 0; | |
022bdb07 TH |
1495 | } |
1496 | ||
1497 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1498 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1499 | } |
1500 | ||
1501 | /** | |
1502 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1503 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1504 | * |
1505 | * Analyze SError if available and further determine cause of | |
1506 | * failure. | |
1507 | * | |
1508 | * LOCKING: | |
1509 | * None. | |
1510 | */ | |
0260731f | 1511 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1512 | { |
0260731f | 1513 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1514 | u32 serror = ehc->i.serror; |
1515 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1516 | u32 hotplug_mask; |
022bdb07 | 1517 | |
e0614db2 | 1518 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1519 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1520 | action |= ATA_EH_RESET; |
022bdb07 TH |
1521 | } |
1522 | if (serror & SERR_PROTOCOL) { | |
1523 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1524 | action |= ATA_EH_RESET; |
022bdb07 TH |
1525 | } |
1526 | if (serror & SERR_INTERNAL) { | |
1527 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1528 | action |= ATA_EH_RESET; |
022bdb07 | 1529 | } |
f9df58cb TH |
1530 | |
1531 | /* Determine whether a hotplug event has occurred. Both | |
1532 | * SError.N/X are considered hotplug events for enabled or | |
1533 | * host links. For disabled PMP links, only N bit is | |
1534 | * considered as X bit is left at 1 for link plugging. | |
1535 | */ | |
eb0e85e3 | 1536 | if (link->lpm_policy > ATA_LPM_MAX_POWER) |
6b7ae954 TH |
1537 | hotplug_mask = 0; /* hotplug doesn't work w/ LPM */ |
1538 | else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
f9df58cb TH |
1539 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
1540 | else | |
1541 | hotplug_mask = SERR_PHYRDY_CHG; | |
1542 | ||
1543 | if (serror & hotplug_mask) | |
084fe639 | 1544 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1545 | |
1546 | ehc->i.err_mask |= err_mask; | |
1547 | ehc->i.action |= action; | |
1548 | } | |
1549 | ||
1550 | /** | |
1551 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1552 | * @qc: qc to analyze | |
022bdb07 TH |
1553 | * |
1554 | * Analyze taskfile of @qc and further determine cause of | |
1555 | * failure. This function also requests ATAPI sense data if | |
25985edc | 1556 | * available. |
022bdb07 TH |
1557 | * |
1558 | * LOCKING: | |
1559 | * Kernel thread context (may sleep). | |
1560 | * | |
1561 | * RETURNS: | |
1562 | * Determined recovery action | |
1563 | */ | |
e3b1fff6 | 1564 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc) |
022bdb07 | 1565 | { |
e3b1fff6 | 1566 | const struct ata_taskfile *tf = &qc->result_tf; |
022bdb07 | 1567 | unsigned int tmp, action = 0; |
efcef265 | 1568 | u8 stat = tf->status, err = tf->error; |
022bdb07 TH |
1569 | |
1570 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1571 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1572 | return ATA_EH_RESET; |
022bdb07 TH |
1573 | } |
1574 | ||
e87fd28c | 1575 | if (stat & (ATA_ERR | ATA_DF)) { |
a51d644a | 1576 | qc->err_mask |= AC_ERR_DEV; |
e87fd28c HR |
1577 | /* |
1578 | * Sense data reporting does not work if the | |
1579 | * device fault bit is set. | |
1580 | */ | |
1581 | if (stat & ATA_DF) | |
1582 | stat &= ~ATA_SENSE; | |
1583 | } else { | |
022bdb07 | 1584 | return 0; |
e87fd28c | 1585 | } |
022bdb07 TH |
1586 | |
1587 | switch (qc->dev->class) { | |
013115d9 | 1588 | case ATA_DEV_ATA: |
9162c657 | 1589 | case ATA_DEV_ZAC: |
461ec040 NC |
1590 | /* |
1591 | * Fetch the sense data explicitly if: | |
1592 | * -It was a non-NCQ command that failed, or | |
1593 | * -It was a NCQ command that failed, but the sense data | |
1594 | * was not included in the NCQ command error log | |
1595 | * (i.e. NCQ autosense is not supported by the device). | |
1596 | */ | |
24aeebbf NC |
1597 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID) && |
1598 | (stat & ATA_SENSE) && ata_eh_request_sense(qc)) | |
1599 | set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); | |
022bdb07 TH |
1600 | if (err & ATA_ICRC) |
1601 | qc->err_mask |= AC_ERR_ATA_BUS; | |
eec7e1c1 | 1602 | if (err & (ATA_UNC | ATA_AMNF)) |
022bdb07 TH |
1603 | qc->err_mask |= AC_ERR_MEDIA; |
1604 | if (err & ATA_IDNF) | |
1605 | qc->err_mask |= AC_ERR_INVALID; | |
1606 | break; | |
1607 | ||
1608 | case ATA_DEV_ATAPI: | |
4cb7c6f1 | 1609 | if (!ata_port_is_frozen(qc->ap)) { |
3eabddb8 TH |
1610 | tmp = atapi_eh_request_sense(qc->dev, |
1611 | qc->scsicmd->sense_buffer, | |
efcef265 | 1612 | qc->result_tf.error >> 4); |
3852e373 | 1613 | if (!tmp) |
a569a30d | 1614 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
3852e373 | 1615 | else |
a569a30d TH |
1616 | qc->err_mask |= tmp; |
1617 | } | |
022bdb07 TH |
1618 | } |
1619 | ||
3852e373 | 1620 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { |
b8e162f9 | 1621 | enum scsi_disposition ret = scsi_check_sense(qc->scsicmd); |
3852e373 | 1622 | /* |
79487259 | 1623 | * SUCCESS here means that the sense code could be |
3852e373 HR |
1624 | * evaluated and should be passed to the upper layers |
1625 | * for correct evaluation. | |
79487259 | 1626 | * FAILED means the sense code could not be interpreted |
3852e373 HR |
1627 | * and the device would need to be reset. |
1628 | * NEEDS_RETRY and ADD_TO_MLQUEUE means that the | |
1629 | * command would need to be retried. | |
1630 | */ | |
1631 | if (ret == NEEDS_RETRY || ret == ADD_TO_MLQUEUE) { | |
1632 | qc->flags |= ATA_QCFLAG_RETRY; | |
1633 | qc->err_mask |= AC_ERR_OTHER; | |
1634 | } else if (ret != SUCCESS) { | |
1635 | qc->err_mask |= AC_ERR_HSM; | |
1636 | } | |
1637 | } | |
022bdb07 | 1638 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) |
cf480626 | 1639 | action |= ATA_EH_RESET; |
022bdb07 TH |
1640 | |
1641 | return action; | |
1642 | } | |
1643 | ||
76326ac1 TH |
1644 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1645 | int *xfer_ok) | |
022bdb07 | 1646 | { |
76326ac1 TH |
1647 | int base = 0; |
1648 | ||
1649 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1650 | *xfer_ok = 1; | |
1651 | ||
1652 | if (!*xfer_ok) | |
75f9cafc | 1653 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1654 | |
7d47e8d4 | 1655 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1656 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1657 | |
7d47e8d4 | 1658 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1659 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1660 | |
3884f7b0 | 1661 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1662 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1663 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1664 | if ((err_mask & |
1665 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1666 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1667 | } |
1668 | ||
1669 | return 0; | |
1670 | } | |
1671 | ||
7d47e8d4 | 1672 | struct speed_down_verdict_arg { |
022bdb07 | 1673 | u64 since; |
76326ac1 | 1674 | int xfer_ok; |
3884f7b0 | 1675 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1676 | }; |
1677 | ||
7d47e8d4 | 1678 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1679 | { |
7d47e8d4 | 1680 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1681 | int cat; |
022bdb07 | 1682 | |
d9027470 | 1683 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since)) |
022bdb07 TH |
1684 | return -1; |
1685 | ||
76326ac1 TH |
1686 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1687 | &arg->xfer_ok); | |
7d47e8d4 | 1688 | arg->nr_errors[cat]++; |
76326ac1 | 1689 | |
022bdb07 TH |
1690 | return 0; |
1691 | } | |
1692 | ||
1693 | /** | |
7d47e8d4 | 1694 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1695 | * @dev: Device of interest |
1696 | * | |
1697 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1698 | * whether NCQ needs to be turned off, transfer speed should be |
1699 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1700 | * |
3884f7b0 TH |
1701 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1702 | * | |
1703 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1704 | * IO commands | |
1705 | * | |
1706 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1707 | * | |
76326ac1 TH |
1708 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1709 | * data transfer hasn't been verified. | |
1710 | * | |
3884f7b0 TH |
1711 | * Verdicts are |
1712 | * | |
1713 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1714 | * |
3884f7b0 TH |
1715 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1716 | * to PIO. | |
7d47e8d4 | 1717 | * |
3884f7b0 | 1718 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1719 | * |
3884f7b0 | 1720 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1721 | * taken per error. An action triggered by non-DUBIOUS errors |
1722 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1723 | * This is to expedite speed down decisions right after device is | |
1724 | * initially configured. | |
1725 | * | |
4091fb95 | 1726 | * The following are speed down rules. #1 and #2 deal with |
76326ac1 | 1727 | * DUBIOUS errors. |
7d47e8d4 | 1728 | * |
76326ac1 TH |
1729 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1730 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1731 | * | |
1732 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1733 | * occurred during last 5 mins, NCQ_OFF. | |
1734 | * | |
1735 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
25985edc | 1736 | * occurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1737 | * |
76326ac1 | 1738 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1739 | * during last 10 mins, NCQ_OFF. |
1740 | * | |
76326ac1 | 1741 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1742 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1743 | * |
022bdb07 TH |
1744 | * LOCKING: |
1745 | * Inherited from caller. | |
1746 | * | |
1747 | * RETURNS: | |
7d47e8d4 | 1748 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1749 | */ |
7d47e8d4 | 1750 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1751 | { |
7d47e8d4 TH |
1752 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1753 | u64 j64 = get_jiffies_64(); | |
1754 | struct speed_down_verdict_arg arg; | |
1755 | unsigned int verdict = 0; | |
022bdb07 | 1756 | |
3884f7b0 | 1757 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1758 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1759 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1760 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1761 | |
76326ac1 TH |
1762 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1763 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1764 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1765 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1766 | ||
1767 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1768 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1769 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1770 | ||
3884f7b0 TH |
1771 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1772 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1773 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1774 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1775 | |
3884f7b0 | 1776 | /* scan past 10 mins of error history */ |
022bdb07 | 1777 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1778 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1779 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1780 | |
3884f7b0 TH |
1781 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1782 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1783 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1784 | ||
1785 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1786 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1787 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1788 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1789 | |
7d47e8d4 | 1790 | return verdict; |
022bdb07 TH |
1791 | } |
1792 | ||
1793 | /** | |
1794 | * ata_eh_speed_down - record error and speed down if necessary | |
1795 | * @dev: Failed device | |
3884f7b0 | 1796 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1797 | * @err_mask: err_mask of the error |
1798 | * | |
1799 | * Record error and examine error history to determine whether | |
1800 | * adjusting transmission speed is necessary. It also sets | |
1801 | * transmission limits appropriately if such adjustment is | |
1802 | * necessary. | |
1803 | * | |
1804 | * LOCKING: | |
1805 | * Kernel thread context (may sleep). | |
1806 | * | |
1807 | * RETURNS: | |
7d47e8d4 | 1808 | * Determined recovery action. |
022bdb07 | 1809 | */ |
3884f7b0 TH |
1810 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1811 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1812 | { |
b1c72916 | 1813 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 1814 | int xfer_ok = 0; |
7d47e8d4 TH |
1815 | unsigned int verdict; |
1816 | unsigned int action = 0; | |
1817 | ||
1818 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1819 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1820 | return 0; |
1821 | ||
1822 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1823 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1824 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1825 | |
7d47e8d4 TH |
1826 | /* turn off NCQ? */ |
1827 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1828 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1829 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1830 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
a9a79dfe | 1831 | ata_dev_warn(dev, "NCQ disabled due to excessive errors\n"); |
7d47e8d4 TH |
1832 | goto done; |
1833 | } | |
022bdb07 | 1834 | |
7d47e8d4 TH |
1835 | /* speed down? */ |
1836 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1837 | /* speed down SATA link speed if possible */ | |
a07d499b | 1838 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 1839 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1840 | goto done; |
1841 | } | |
022bdb07 | 1842 | |
7d47e8d4 TH |
1843 | /* lower transfer mode */ |
1844 | if (dev->spdn_cnt < 2) { | |
1845 | static const int dma_dnxfer_sel[] = | |
1846 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1847 | static const int pio_dnxfer_sel[] = | |
1848 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1849 | int sel; | |
1850 | ||
1851 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1852 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1853 | else | |
1854 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1855 | ||
1856 | dev->spdn_cnt++; | |
1857 | ||
1858 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1859 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1860 | goto done; |
1861 | } | |
1862 | } | |
1863 | } | |
1864 | ||
1865 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1866 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1867 | */ |
1868 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1869 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1870 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1871 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1872 | dev->spdn_cnt = 0; | |
cf480626 | 1873 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1874 | goto done; |
1875 | } | |
1876 | } | |
022bdb07 | 1877 | |
022bdb07 | 1878 | return 0; |
7d47e8d4 TH |
1879 | done: |
1880 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1881 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1882 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1883 | return action; |
022bdb07 TH |
1884 | } |
1885 | ||
8d899e70 ML |
1886 | /** |
1887 | * ata_eh_worth_retry - analyze error and decide whether to retry | |
1888 | * @qc: qc to possibly retry | |
1889 | * | |
1890 | * Look at the cause of the error and decide if a retry | |
1891 | * might be useful or not. We don't want to retry media errors | |
1892 | * because the drive itself has probably already taken 10-30 seconds | |
1893 | * doing its own internal retries before reporting the failure. | |
1894 | */ | |
1895 | static inline int ata_eh_worth_retry(struct ata_queued_cmd *qc) | |
1896 | { | |
1eaca39a | 1897 | if (qc->err_mask & AC_ERR_MEDIA) |
8d899e70 ML |
1898 | return 0; /* don't retry media errors */ |
1899 | if (qc->flags & ATA_QCFLAG_IO) | |
1900 | return 1; /* otherwise retry anything from fs stack */ | |
1901 | if (qc->err_mask & AC_ERR_INVALID) | |
1902 | return 0; /* don't retry these */ | |
1903 | return qc->err_mask != AC_ERR_DEV; /* retry if not dev error */ | |
1904 | } | |
1905 | ||
7eb49509 DLM |
1906 | /** |
1907 | * ata_eh_quiet - check if we need to be quiet about a command error | |
1908 | * @qc: qc to check | |
1909 | * | |
1910 | * Look at the qc flags anbd its scsi command request flags to determine | |
1911 | * if we need to be quiet about the command failure. | |
1912 | */ | |
1913 | static inline bool ata_eh_quiet(struct ata_queued_cmd *qc) | |
1914 | { | |
c8329cd5 | 1915 | if (qc->scsicmd && scsi_cmd_to_rq(qc->scsicmd)->rq_flags & RQF_QUIET) |
7eb49509 DLM |
1916 | qc->flags |= ATA_QCFLAG_QUIET; |
1917 | return qc->flags & ATA_QCFLAG_QUIET; | |
1918 | } | |
1919 | ||
18bd7718 NC |
1920 | static int ata_eh_read_sense_success_non_ncq(struct ata_link *link) |
1921 | { | |
1922 | struct ata_port *ap = link->ap; | |
1923 | struct ata_queued_cmd *qc; | |
1924 | ||
1925 | qc = __ata_qc_from_tag(ap, link->active_tag); | |
1926 | if (!qc) | |
1927 | return -EIO; | |
1928 | ||
1929 | if (!(qc->flags & ATA_QCFLAG_EH) || | |
1930 | !(qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD) || | |
1931 | qc->err_mask) | |
1932 | return -EIO; | |
1933 | ||
1934 | if (!ata_eh_request_sense(qc)) | |
1935 | return -EIO; | |
1936 | ||
1937 | /* | |
1938 | * If we have sense data, call scsi_check_sense() in order to set the | |
1939 | * correct SCSI ML byte (if any). No point in checking the return value, | |
1940 | * since the command has already completed successfully. | |
1941 | */ | |
1942 | scsi_check_sense(qc->scsicmd); | |
1943 | ||
1944 | return 0; | |
1945 | } | |
1946 | ||
1947 | static void ata_eh_get_success_sense(struct ata_link *link) | |
1948 | { | |
1949 | struct ata_eh_context *ehc = &link->eh_context; | |
1950 | struct ata_device *dev = link->device; | |
1951 | struct ata_port *ap = link->ap; | |
1952 | struct ata_queued_cmd *qc; | |
1953 | int tag, ret = 0; | |
1954 | ||
1955 | if (!(ehc->i.dev_action[dev->devno] & ATA_EH_GET_SUCCESS_SENSE)) | |
1956 | return; | |
1957 | ||
1958 | /* if frozen, we can't do much */ | |
1959 | if (ata_port_is_frozen(ap)) { | |
1960 | ata_dev_warn(dev, | |
1961 | "successful sense data available but port frozen\n"); | |
1962 | goto out; | |
1963 | } | |
1964 | ||
1965 | /* | |
1966 | * If the link has sactive set, then we have outstanding NCQ commands | |
1967 | * and have to read the Successful NCQ Commands log to get the sense | |
1968 | * data. Otherwise, we are dealing with a non-NCQ command and use | |
1969 | * request sense ext command to retrieve the sense data. | |
1970 | */ | |
1971 | if (link->sactive) | |
1972 | ret = ata_eh_read_sense_success_ncq_log(link); | |
1973 | else | |
1974 | ret = ata_eh_read_sense_success_non_ncq(link); | |
1975 | if (ret) | |
1976 | goto out; | |
1977 | ||
1978 | ata_eh_done(link, dev, ATA_EH_GET_SUCCESS_SENSE); | |
1979 | return; | |
1980 | ||
1981 | out: | |
1982 | /* | |
1983 | * If we failed to get sense data for a successful command that ought to | |
1984 | * have sense data, we cannot simply return BLK_STS_OK to user space. | |
1985 | * This is because we can't know if the sense data that we couldn't get | |
1986 | * was actually "DATA CURRENTLY UNAVAILABLE". Reporting such a command | |
1987 | * as success to user space would result in a silent data corruption. | |
1988 | * Thus, add a bogus ABORTED_COMMAND sense data to such commands, such | |
1989 | * that SCSI will report these commands as BLK_STS_IOERR to user space. | |
1990 | */ | |
1991 | ata_qc_for_each_raw(ap, qc, tag) { | |
1992 | if (!(qc->flags & ATA_QCFLAG_EH) || | |
1993 | !(qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD) || | |
1994 | qc->err_mask || | |
1995 | ata_dev_phys_link(qc->dev) != link) | |
1996 | continue; | |
1997 | ||
1998 | /* We managed to get sense for this success command, skip. */ | |
1999 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) | |
2000 | continue; | |
2001 | ||
2002 | /* This success command did not have any sense data, skip. */ | |
2003 | if (!(qc->result_tf.status & ATA_SENSE)) | |
2004 | continue; | |
2005 | ||
2006 | /* This success command had sense data, but we failed to get. */ | |
2007 | ata_scsi_set_sense(dev, qc->scsicmd, ABORTED_COMMAND, 0, 0); | |
2008 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
2009 | } | |
2010 | ata_eh_done(link, dev, ATA_EH_GET_SUCCESS_SENSE); | |
2011 | } | |
2012 | ||
022bdb07 | 2013 | /** |
9b1e2658 TH |
2014 | * ata_eh_link_autopsy - analyze error and determine recovery action |
2015 | * @link: host link to perform autopsy on | |
022bdb07 | 2016 | * |
0260731f TH |
2017 | * Analyze why @link failed and determine which recovery actions |
2018 | * are needed. This function also sets more detailed AC_ERR_* | |
2019 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
2020 | * |
2021 | * LOCKING: | |
2022 | * Kernel thread context (may sleep). | |
2023 | */ | |
9b1e2658 | 2024 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 2025 | { |
0260731f | 2026 | struct ata_port *ap = link->ap; |
936fd732 | 2027 | struct ata_eh_context *ehc = &link->eh_context; |
258c4e5c | 2028 | struct ata_queued_cmd *qc; |
dfcc173d | 2029 | struct ata_device *dev; |
3884f7b0 | 2030 | unsigned int all_err_mask = 0, eflags = 0; |
7eb49509 | 2031 | int tag, nr_failed = 0, nr_quiet = 0; |
022bdb07 TH |
2032 | u32 serror; |
2033 | int rc; | |
2034 | ||
1cdaf534 TH |
2035 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
2036 | return; | |
2037 | ||
022bdb07 | 2038 | /* obtain and analyze SError */ |
936fd732 | 2039 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
2040 | if (rc == 0) { |
2041 | ehc->i.serror |= serror; | |
0260731f | 2042 | ata_eh_analyze_serror(link); |
4e57c517 | 2043 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 2044 | /* SError read failed, force reset and probing */ |
b558eddd | 2045 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 2046 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
2047 | ehc->i.err_mask |= AC_ERR_OTHER; |
2048 | } | |
022bdb07 | 2049 | |
e8ee8451 | 2050 | /* analyze NCQ failure */ |
0260731f | 2051 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 2052 | |
18bd7718 NC |
2053 | /* |
2054 | * Check if this was a successful command that simply needs sense data. | |
2055 | * Since the sense data is not part of the completion, we need to fetch | |
2056 | * it using an additional command. Since this can't be done from irq | |
2057 | * context, the sense data for successful commands are fetched by EH. | |
2058 | */ | |
2059 | ata_eh_get_success_sense(link); | |
2060 | ||
022bdb07 TH |
2061 | /* any real error trumps AC_ERR_OTHER */ |
2062 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
2063 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
2064 | ||
2065 | all_err_mask |= ehc->i.err_mask; | |
2066 | ||
258c4e5c | 2067 | ata_qc_for_each_raw(ap, qc, tag) { |
87629312 | 2068 | if (!(qc->flags & ATA_QCFLAG_EH) || |
3d8a3ae3 | 2069 | qc->flags & ATA_QCFLAG_RETRY || |
18bd7718 | 2070 | qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD || |
b1c72916 | 2071 | ata_dev_phys_link(qc->dev) != link) |
022bdb07 TH |
2072 | continue; |
2073 | ||
2074 | /* inherit upper level err_mask */ | |
2075 | qc->err_mask |= ehc->i.err_mask; | |
2076 | ||
022bdb07 | 2077 | /* analyze TF */ |
e3b1fff6 | 2078 | ehc->i.action |= ata_eh_analyze_tf(qc); |
022bdb07 TH |
2079 | |
2080 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
2081 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
2082 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
2083 | AC_ERR_INVALID); | |
2084 | ||
2085 | /* any real error trumps unknown error */ | |
2086 | if (qc->err_mask & ~AC_ERR_OTHER) | |
2087 | qc->err_mask &= ~AC_ERR_OTHER; | |
2088 | ||
804689ad DLM |
2089 | /* |
2090 | * SENSE_VALID trumps dev/unknown error and revalidation. Upper | |
2091 | * layers will determine whether the command is worth retrying | |
2092 | * based on the sense data and device class/type. Otherwise, | |
2093 | * determine directly if the command is worth retrying using its | |
2094 | * error mask and flags. | |
2095 | */ | |
f90f0828 | 2096 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 2097 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
804689ad | 2098 | else if (ata_eh_worth_retry(qc)) |
03faab78 TH |
2099 | qc->flags |= ATA_QCFLAG_RETRY; |
2100 | ||
022bdb07 | 2101 | /* accumulate error info */ |
4528e4da | 2102 | ehc->i.dev = qc->dev; |
022bdb07 TH |
2103 | all_err_mask |= qc->err_mask; |
2104 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 2105 | eflags |= ATA_EFLAG_IS_IO; |
255c03d1 | 2106 | trace_ata_eh_link_autopsy_qc(qc); |
7eb49509 DLM |
2107 | |
2108 | /* Count quiet errors */ | |
2109 | if (ata_eh_quiet(qc)) | |
2110 | nr_quiet++; | |
2111 | nr_failed++; | |
022bdb07 TH |
2112 | } |
2113 | ||
7eb49509 DLM |
2114 | /* If all failed commands requested silence, then be quiet */ |
2115 | if (nr_quiet == nr_failed) | |
2116 | ehc->i.flags |= ATA_EHI_QUIET; | |
2117 | ||
a20f33ff | 2118 | /* enforce default EH actions */ |
4cb7c6f1 | 2119 | if (ata_port_is_frozen(ap) || |
a20f33ff | 2120 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2121 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2122 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2123 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2124 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2125 | |
dfcc173d TH |
2126 | /* If we have offending qcs and the associated failed device, |
2127 | * perform per-dev EH action only on the offending device. | |
2128 | */ | |
4528e4da | 2129 | if (ehc->i.dev) { |
4528e4da TH |
2130 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2131 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2132 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2133 | } |
2134 | ||
2695e366 TH |
2135 | /* propagate timeout to host link */ |
2136 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2137 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2138 | ||
2139 | /* record error and consider speeding down */ | |
dfcc173d | 2140 | dev = ehc->i.dev; |
2695e366 TH |
2141 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2142 | ata_dev_enabled(link->device)))) | |
2143 | dev = link->device; | |
dfcc173d | 2144 | |
76326ac1 TH |
2145 | if (dev) { |
2146 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2147 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2148 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
f1601113 | 2149 | trace_ata_eh_link_autopsy(dev, ehc->i.action, all_err_mask); |
76326ac1 | 2150 | } |
022bdb07 TH |
2151 | } |
2152 | ||
2153 | /** | |
9b1e2658 TH |
2154 | * ata_eh_autopsy - analyze error and determine recovery action |
2155 | * @ap: host port to perform autopsy on | |
2156 | * | |
2157 | * Analyze all links of @ap and determine why they failed and | |
2158 | * which recovery actions are needed. | |
2159 | * | |
2160 | * LOCKING: | |
2161 | * Kernel thread context (may sleep). | |
2162 | */ | |
fb7fd614 | 2163 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2164 | { |
2165 | struct ata_link *link; | |
2166 | ||
1eca4365 | 2167 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2168 | ata_eh_link_autopsy(link); |
2695e366 | 2169 | |
b1c72916 TH |
2170 | /* Handle the frigging slave link. Autopsy is done similarly |
2171 | * but actions and flags are transferred over to the master | |
2172 | * link and handled from there. | |
2173 | */ | |
2174 | if (ap->slave_link) { | |
2175 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2176 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2177 | ||
848e4c68 TH |
2178 | /* transfer control flags from master to slave */ |
2179 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2180 | ||
2181 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2182 | ata_eh_link_autopsy(ap->slave_link); |
2183 | ||
848e4c68 | 2184 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2185 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2186 | mehc->i.action |= sehc->i.action; | |
2187 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2188 | mehc->i.flags |= sehc->i.flags; | |
2189 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2190 | } | |
2191 | ||
2695e366 TH |
2192 | /* Autopsy of fanout ports can affect host link autopsy. |
2193 | * Perform host link autopsy last. | |
2194 | */ | |
071f44b1 | 2195 | if (sata_pmp_attached(ap)) |
2695e366 | 2196 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2197 | } |
2198 | ||
6521148c | 2199 | /** |
d4520903 HR |
2200 | * ata_get_cmd_name - get name for ATA command |
2201 | * @command: ATA command code to get name for | |
6521148c | 2202 | * |
d4520903 | 2203 | * Return a textual name of the given command or "unknown" |
6521148c RH |
2204 | * |
2205 | * LOCKING: | |
2206 | * None | |
2207 | */ | |
d4520903 | 2208 | const char *ata_get_cmd_name(u8 command) |
6521148c RH |
2209 | { |
2210 | #ifdef CONFIG_ATA_VERBOSE_ERROR | |
2211 | static const struct | |
2212 | { | |
2213 | u8 command; | |
2214 | const char *text; | |
2215 | } cmd_descr[] = { | |
2216 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, | |
825e2d87 HR |
2217 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, |
2218 | { ATA_CMD_STANDBY, "STANDBY" }, | |
2219 | { ATA_CMD_IDLE, "IDLE" }, | |
2220 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, | |
2221 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, | |
3915c3b5 | 2222 | { ATA_CMD_DOWNLOAD_MICRO_DMA, "DOWNLOAD MICROCODE DMA" }, |
6521148c | 2223 | { ATA_CMD_NOP, "NOP" }, |
825e2d87 HR |
2224 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, |
2225 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, | |
2226 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, | |
2227 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, | |
2228 | { ATA_CMD_SERVICE, "SERVICE" }, | |
2229 | { ATA_CMD_READ, "READ DMA" }, | |
2230 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, | |
2231 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, | |
2232 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, | |
6521148c | 2233 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, |
825e2d87 HR |
2234 | { ATA_CMD_WRITE, "WRITE DMA" }, |
2235 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, | |
2236 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, | |
2237 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, | |
6521148c RH |
2238 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, |
2239 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, | |
2240 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, | |
2241 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, | |
2242 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, | |
d3122bf9 | 2243 | { ATA_CMD_NCQ_NON_DATA, "NCQ NON-DATA" }, |
3915c3b5 RH |
2244 | { ATA_CMD_FPDMA_SEND, "SEND FPDMA QUEUED" }, |
2245 | { ATA_CMD_FPDMA_RECV, "RECEIVE FPDMA QUEUED" }, | |
6521148c RH |
2246 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, |
2247 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, | |
2248 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, | |
2249 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, | |
2250 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, | |
2251 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, | |
2252 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, | |
2253 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, | |
825e2d87 | 2254 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, |
6521148c RH |
2255 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, |
2256 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, | |
2257 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, | |
2258 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, | |
2259 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, | |
2260 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, | |
2261 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, | |
2262 | { ATA_CMD_SLEEP, "SLEEP" }, | |
2263 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, | |
2264 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, | |
2265 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, | |
2266 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, | |
2267 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, | |
2268 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, | |
2269 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, | |
2270 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, | |
825e2d87 | 2271 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, |
3915c3b5 | 2272 | { ATA_CMD_TRUSTED_NONDATA, "TRUSTED NON-DATA" }, |
6521148c | 2273 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, |
825e2d87 | 2274 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, |
6521148c | 2275 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, |
825e2d87 | 2276 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, |
6521148c | 2277 | { ATA_CMD_PMP_READ, "READ BUFFER" }, |
3915c3b5 | 2278 | { ATA_CMD_PMP_READ_DMA, "READ BUFFER DMA" }, |
6521148c | 2279 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, |
3915c3b5 | 2280 | { ATA_CMD_PMP_WRITE_DMA, "WRITE BUFFER DMA" }, |
6521148c RH |
2281 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, |
2282 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, | |
2283 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, | |
2284 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, | |
2285 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, | |
2286 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, | |
2287 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, | |
2288 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, | |
2289 | { ATA_CMD_SMART, "SMART" }, | |
2290 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, | |
2291 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, | |
acad7627 | 2292 | { ATA_CMD_DSM, "DATA SET MANAGEMENT" }, |
825e2d87 HR |
2293 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, |
2294 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, | |
6521148c RH |
2295 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, |
2296 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, | |
2297 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, | |
825e2d87 | 2298 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, |
3915c3b5 RH |
2299 | { ATA_CMD_REQ_SENSE_DATA, "REQUEST SENSE DATA EXT" }, |
2300 | { ATA_CMD_SANITIZE_DEVICE, "SANITIZE DEVICE" }, | |
28a3fc22 | 2301 | { ATA_CMD_ZAC_MGMT_IN, "ZAC MANAGEMENT IN" }, |
27708a95 | 2302 | { ATA_CMD_ZAC_MGMT_OUT, "ZAC MANAGEMENT OUT" }, |
6521148c RH |
2303 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, |
2304 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, | |
2305 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, | |
2306 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, | |
2307 | { ATA_CMD_RESTORE, "RECALIBRATE" }, | |
2308 | { 0, NULL } /* terminate list */ | |
2309 | }; | |
2310 | ||
2311 | unsigned int i; | |
2312 | for (i = 0; cmd_descr[i].text; i++) | |
2313 | if (cmd_descr[i].command == command) | |
2314 | return cmd_descr[i].text; | |
2315 | #endif | |
2316 | ||
d4520903 | 2317 | return "unknown"; |
6521148c | 2318 | } |
d4520903 | 2319 | EXPORT_SYMBOL_GPL(ata_get_cmd_name); |
6521148c | 2320 | |
9b1e2658 TH |
2321 | /** |
2322 | * ata_eh_link_report - report error handling to user | |
0260731f | 2323 | * @link: ATA link EH is going on |
022bdb07 TH |
2324 | * |
2325 | * Report EH to user. | |
2326 | * | |
2327 | * LOCKING: | |
2328 | * None. | |
2329 | */ | |
9b1e2658 | 2330 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2331 | { |
0260731f TH |
2332 | struct ata_port *ap = link->ap; |
2333 | struct ata_eh_context *ehc = &link->eh_context; | |
258c4e5c | 2334 | struct ata_queued_cmd *qc; |
022bdb07 | 2335 | const char *frozen, *desc; |
462098b0 | 2336 | char tries_buf[6] = ""; |
022bdb07 TH |
2337 | int tag, nr_failed = 0; |
2338 | ||
94ff3d54 TH |
2339 | if (ehc->i.flags & ATA_EHI_QUIET) |
2340 | return; | |
2341 | ||
022bdb07 TH |
2342 | desc = NULL; |
2343 | if (ehc->i.desc[0] != '\0') | |
2344 | desc = ehc->i.desc; | |
2345 | ||
258c4e5c | 2346 | ata_qc_for_each_raw(ap, qc, tag) { |
87629312 | 2347 | if (!(qc->flags & ATA_QCFLAG_EH) || |
b1c72916 | 2348 | ata_dev_phys_link(qc->dev) != link || |
e027bd36 TH |
2349 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2350 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2351 | continue; |
2352 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2353 | continue; | |
2354 | ||
2355 | nr_failed++; | |
2356 | } | |
2357 | ||
2358 | if (!nr_failed && !ehc->i.err_mask) | |
2359 | return; | |
2360 | ||
2361 | frozen = ""; | |
4cb7c6f1 | 2362 | if (ata_port_is_frozen(ap)) |
022bdb07 TH |
2363 | frozen = " frozen"; |
2364 | ||
a1e10f7e | 2365 | if (ap->eh_tries < ATA_EH_MAX_TRIES) |
462098b0 | 2366 | snprintf(tries_buf, sizeof(tries_buf), " t%d", |
a1e10f7e TH |
2367 | ap->eh_tries); |
2368 | ||
022bdb07 | 2369 | if (ehc->i.dev) { |
a9a79dfe JP |
2370 | ata_dev_err(ehc->i.dev, "exception Emask 0x%x " |
2371 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2372 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2373 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2374 | if (desc) |
a9a79dfe | 2375 | ata_dev_err(ehc->i.dev, "%s\n", desc); |
022bdb07 | 2376 | } else { |
a9a79dfe JP |
2377 | ata_link_err(link, "exception Emask 0x%x " |
2378 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2379 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2380 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2381 | if (desc) |
a9a79dfe | 2382 | ata_link_err(link, "%s\n", desc); |
022bdb07 TH |
2383 | } |
2384 | ||
6521148c | 2385 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2386 | if (ehc->i.serror) |
a9a79dfe | 2387 | ata_link_err(link, |
1333e194 RH |
2388 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2389 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2390 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2391 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2392 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2393 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2394 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2395 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2396 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2397 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2398 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2399 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2400 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2401 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2402 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2403 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2404 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2405 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
6521148c | 2406 | #endif |
1333e194 | 2407 | |
258c4e5c | 2408 | ata_qc_for_each_raw(ap, qc, tag) { |
8a937581 | 2409 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2410 | char data_buf[20] = ""; |
2411 | char cdb_buf[70] = ""; | |
022bdb07 | 2412 | |
87629312 | 2413 | if (!(qc->flags & ATA_QCFLAG_EH) || |
b1c72916 | 2414 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2415 | continue; |
2416 | ||
abb6a889 TH |
2417 | if (qc->dma_dir != DMA_NONE) { |
2418 | static const char *dma_str[] = { | |
2419 | [DMA_BIDIRECTIONAL] = "bidi", | |
2420 | [DMA_TO_DEVICE] = "out", | |
2421 | [DMA_FROM_DEVICE] = "in", | |
2422 | }; | |
fb1b8b11 GU |
2423 | const char *prot_str = NULL; |
2424 | ||
2425 | switch (qc->tf.protocol) { | |
2426 | case ATA_PROT_UNKNOWN: | |
2427 | prot_str = "unknown"; | |
2428 | break; | |
2429 | case ATA_PROT_NODATA: | |
2430 | prot_str = "nodata"; | |
2431 | break; | |
2432 | case ATA_PROT_PIO: | |
2433 | prot_str = "pio"; | |
2434 | break; | |
2435 | case ATA_PROT_DMA: | |
2436 | prot_str = "dma"; | |
2437 | break; | |
2438 | case ATA_PROT_NCQ: | |
2439 | prot_str = "ncq dma"; | |
2440 | break; | |
2441 | case ATA_PROT_NCQ_NODATA: | |
2442 | prot_str = "ncq nodata"; | |
2443 | break; | |
2444 | case ATAPI_PROT_NODATA: | |
2445 | prot_str = "nodata"; | |
2446 | break; | |
2447 | case ATAPI_PROT_PIO: | |
2448 | prot_str = "pio"; | |
2449 | break; | |
2450 | case ATAPI_PROT_DMA: | |
2451 | prot_str = "dma"; | |
2452 | break; | |
2453 | } | |
abb6a889 | 2454 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", |
fb1b8b11 | 2455 | prot_str, qc->nbytes, dma_str[qc->dma_dir]); |
abb6a889 TH |
2456 | } |
2457 | ||
6521148c | 2458 | if (ata_is_atapi(qc->tf.protocol)) { |
a13b0c9d HR |
2459 | const u8 *cdb = qc->cdb; |
2460 | size_t cdb_len = qc->dev->cdb_len; | |
2461 | ||
cbba5b0e HR |
2462 | if (qc->scsicmd) { |
2463 | cdb = qc->scsicmd->cmnd; | |
2464 | cdb_len = qc->scsicmd->cmd_len; | |
2465 | } | |
2466 | __scsi_format_command(cdb_buf, sizeof(cdb_buf), | |
2467 | cdb, cdb_len); | |
d4520903 HR |
2468 | } else |
2469 | ata_dev_err(qc->dev, "failed command: %s\n", | |
2470 | ata_get_cmd_name(cmd->command)); | |
abb6a889 | 2471 | |
a9a79dfe | 2472 | ata_dev_err(qc->dev, |
8a937581 | 2473 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
abb6a889 | 2474 | "tag %d%s\n %s" |
8a937581 | 2475 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2476 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2477 | cmd->command, cmd->feature, cmd->nsect, |
2478 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2479 | cmd->hob_feature, cmd->hob_nsect, | |
2480 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2481 | cmd->device, qc->tag, data_buf, cdb_buf, |
efcef265 | 2482 | res->status, res->error, res->nsect, |
8a937581 TH |
2483 | res->lbal, res->lbam, res->lbah, |
2484 | res->hob_feature, res->hob_nsect, | |
2485 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2486 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2487 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 | 2488 | |
6521148c | 2489 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
efcef265 SS |
2490 | if (res->status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
2491 | ATA_SENSE | ATA_ERR)) { | |
2492 | if (res->status & ATA_BUSY) | |
a9a79dfe | 2493 | ata_dev_err(qc->dev, "status: { Busy }\n"); |
1333e194 | 2494 | else |
e87fd28c | 2495 | ata_dev_err(qc->dev, "status: { %s%s%s%s%s}\n", |
efcef265 SS |
2496 | res->status & ATA_DRDY ? "DRDY " : "", |
2497 | res->status & ATA_DF ? "DF " : "", | |
2498 | res->status & ATA_DRQ ? "DRQ " : "", | |
2499 | res->status & ATA_SENSE ? "SENSE " : "", | |
2500 | res->status & ATA_ERR ? "ERR " : ""); | |
1333e194 RH |
2501 | } |
2502 | ||
2503 | if (cmd->command != ATA_CMD_PACKET && | |
efcef265 SS |
2504 | (res->error & (ATA_ICRC | ATA_UNC | ATA_AMNF | ATA_IDNF | |
2505 | ATA_ABORTED))) | |
eec7e1c1 | 2506 | ata_dev_err(qc->dev, "error: { %s%s%s%s%s}\n", |
efcef265 SS |
2507 | res->error & ATA_ICRC ? "ICRC " : "", |
2508 | res->error & ATA_UNC ? "UNC " : "", | |
2509 | res->error & ATA_AMNF ? "AMNF " : "", | |
2510 | res->error & ATA_IDNF ? "IDNF " : "", | |
2511 | res->error & ATA_ABORTED ? "ABRT " : ""); | |
6521148c | 2512 | #endif |
022bdb07 TH |
2513 | } |
2514 | } | |
2515 | ||
9b1e2658 TH |
2516 | /** |
2517 | * ata_eh_report - report error handling to user | |
2518 | * @ap: ATA port to report EH about | |
2519 | * | |
2520 | * Report EH to user. | |
2521 | * | |
2522 | * LOCKING: | |
2523 | * None. | |
2524 | */ | |
fb7fd614 | 2525 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2526 | { |
2527 | struct ata_link *link; | |
2528 | ||
1eca4365 | 2529 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2530 | ata_eh_link_report(link); |
2531 | } | |
2532 | ||
cc0680a5 | 2533 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2534 | unsigned int *classes, unsigned long deadline, |
2535 | bool clear_classes) | |
d87fa38e | 2536 | { |
f58229f8 | 2537 | struct ata_device *dev; |
d87fa38e | 2538 | |
b1c72916 | 2539 | if (clear_classes) |
1eca4365 | 2540 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2541 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2542 | |
f046519f | 2543 | return reset(link, classes, deadline); |
d87fa38e TH |
2544 | } |
2545 | ||
e8411fba | 2546 | static int ata_eh_followup_srst_needed(struct ata_link *link, int rc) |
664faf09 | 2547 | { |
45db2f6c | 2548 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2549 | return 0; |
5dbfc9cb TH |
2550 | if (rc == -EAGAIN) |
2551 | return 1; | |
071f44b1 | 2552 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2553 | return 1; |
664faf09 TH |
2554 | return 0; |
2555 | } | |
2556 | ||
fb7fd614 TH |
2557 | int ata_eh_reset(struct ata_link *link, int classify, |
2558 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2559 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2560 | { |
afaa5c37 | 2561 | struct ata_port *ap = link->ap; |
b1c72916 | 2562 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2563 | struct ata_eh_context *ehc = &link->eh_context; |
705d2014 | 2564 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
664faf09 | 2565 | unsigned int *classes = ehc->classes; |
416dc9ed | 2566 | unsigned int lflags = link->flags; |
1cdaf534 | 2567 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2568 | int max_tries = 0, try = 0; |
b1c72916 | 2569 | struct ata_link *failed_link; |
f58229f8 | 2570 | struct ata_device *dev; |
416dc9ed | 2571 | unsigned long deadline, now; |
022bdb07 | 2572 | ata_reset_fn_t reset; |
afaa5c37 | 2573 | unsigned long flags; |
416dc9ed | 2574 | u32 sstatus; |
b1c72916 | 2575 | int nr_unknown, rc; |
022bdb07 | 2576 | |
932648b0 TH |
2577 | /* |
2578 | * Prepare to reset | |
2579 | */ | |
d8af0eb6 TH |
2580 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2581 | max_tries++; | |
ca6d43b0 DW |
2582 | if (link->flags & ATA_LFLAG_RST_ONCE) |
2583 | max_tries = 1; | |
05944bdf TH |
2584 | if (link->flags & ATA_LFLAG_NO_HRST) |
2585 | hardreset = NULL; | |
2586 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2587 | softreset = NULL; | |
d8af0eb6 | 2588 | |
25985edc | 2589 | /* make sure each reset attempt is at least COOL_DOWN apart */ |
19b72321 TH |
2590 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
2591 | now = jiffies; | |
2592 | WARN_ON(time_after(ehc->last_reset, now)); | |
2593 | deadline = ata_deadline(ehc->last_reset, | |
2594 | ATA_EH_RESET_COOL_DOWN); | |
2595 | if (time_before(now, deadline)) | |
2596 | schedule_timeout_uninterruptible(deadline - now); | |
2597 | } | |
0a2c0f56 | 2598 | |
afaa5c37 TH |
2599 | spin_lock_irqsave(ap->lock, flags); |
2600 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2601 | spin_unlock_irqrestore(ap->lock, flags); | |
2602 | ||
cf480626 | 2603 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2604 | |
1eca4365 | 2605 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2606 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2607 | * may change configuration and be in PIO0 timing. If | |
2608 | * we do a hard reset (or are coming from power on) | |
2609 | * this is true for ATA or ATAPI. Until we've set a | |
2610 | * suitable controller mode we should not touch the | |
2611 | * bus as we may be talking too fast. | |
2612 | */ | |
2613 | dev->pio_mode = XFER_PIO_0; | |
5416912a | 2614 | dev->dma_mode = 0xff; |
cdeab114 TH |
2615 | |
2616 | /* If the controller has a pio mode setup function | |
2617 | * then use it to set the chipset to rights. Don't | |
2618 | * touch the DMA setup as that will be dealt with when | |
2619 | * configuring devices. | |
2620 | */ | |
2621 | if (ap->ops->set_piomode) | |
2622 | ap->ops->set_piomode(ap, dev); | |
2623 | } | |
2624 | ||
cf480626 | 2625 | /* prefer hardreset */ |
932648b0 | 2626 | reset = NULL; |
cf480626 TH |
2627 | ehc->i.action &= ~ATA_EH_RESET; |
2628 | if (hardreset) { | |
2629 | reset = hardreset; | |
a674050e | 2630 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2631 | } else if (softreset) { |
cf480626 | 2632 | reset = softreset; |
a674050e | 2633 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2634 | } |
f5914a46 TH |
2635 | |
2636 | if (prereset) { | |
b1c72916 TH |
2637 | unsigned long deadline = ata_deadline(jiffies, |
2638 | ATA_EH_PRERESET_TIMEOUT); | |
2639 | ||
2640 | if (slave) { | |
2641 | sehc->i.action &= ~ATA_EH_RESET; | |
2642 | sehc->i.action |= ehc->i.action; | |
2643 | } | |
2644 | ||
2645 | rc = prereset(link, deadline); | |
2646 | ||
2647 | /* If present, do prereset on slave link too. Reset | |
2648 | * is skipped iff both master and slave links report | |
2649 | * -ENOENT or clear ATA_EH_RESET. | |
2650 | */ | |
2651 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2652 | int tmp; | |
2653 | ||
2654 | tmp = prereset(slave, deadline); | |
2655 | if (tmp != -ENOENT) | |
2656 | rc = tmp; | |
2657 | ||
2658 | ehc->i.action |= sehc->i.action; | |
2659 | } | |
2660 | ||
f5914a46 | 2661 | if (rc) { |
c961922b | 2662 | if (rc == -ENOENT) { |
a9a79dfe | 2663 | ata_link_dbg(link, "port disabled--ignoring\n"); |
cf480626 | 2664 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2665 | |
1eca4365 | 2666 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2667 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2668 | |
2669 | rc = 0; | |
c961922b | 2670 | } else |
a9a79dfe JP |
2671 | ata_link_err(link, |
2672 | "prereset failed (errno=%d)\n", | |
2673 | rc); | |
fccb6ea5 | 2674 | goto out; |
f5914a46 | 2675 | } |
f5914a46 | 2676 | |
932648b0 | 2677 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2678 | * bang classes, thaw and return. |
932648b0 TH |
2679 | */ |
2680 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2681 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2682 | classes[dev->devno] = ATA_DEV_NONE; |
4cb7c6f1 | 2683 | if (ata_port_is_frozen(ap) && ata_is_host_link(link)) |
d6515e6f | 2684 | ata_eh_thaw_port(ap); |
932648b0 TH |
2685 | rc = 0; |
2686 | goto out; | |
2687 | } | |
f5914a46 TH |
2688 | } |
2689 | ||
022bdb07 | 2690 | retry: |
932648b0 TH |
2691 | /* |
2692 | * Perform reset | |
2693 | */ | |
dc98c32c TH |
2694 | if (ata_is_host_link(link)) |
2695 | ata_eh_freeze_port(ap); | |
2696 | ||
341c2c95 | 2697 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2698 | |
932648b0 TH |
2699 | if (reset) { |
2700 | if (verbose) | |
a9a79dfe JP |
2701 | ata_link_info(link, "%s resetting link\n", |
2702 | reset == softreset ? "soft" : "hard"); | |
932648b0 TH |
2703 | |
2704 | /* mark that this EH session started with reset */ | |
19b72321 | 2705 | ehc->last_reset = jiffies; |
f8ec26d0 | 2706 | if (reset == hardreset) { |
932648b0 | 2707 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; |
f8ec26d0 HR |
2708 | trace_ata_link_hardreset_begin(link, classes, deadline); |
2709 | } else { | |
932648b0 | 2710 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; |
f8ec26d0 HR |
2711 | trace_ata_link_softreset_begin(link, classes, deadline); |
2712 | } | |
022bdb07 | 2713 | |
b1c72916 | 2714 | rc = ata_do_reset(link, reset, classes, deadline, true); |
f8ec26d0 HR |
2715 | if (reset == hardreset) |
2716 | trace_ata_link_hardreset_end(link, classes, rc); | |
2717 | else | |
2718 | trace_ata_link_softreset_end(link, classes, rc); | |
b1c72916 TH |
2719 | if (rc && rc != -EAGAIN) { |
2720 | failed_link = link; | |
5dbfc9cb | 2721 | goto fail; |
b1c72916 TH |
2722 | } |
2723 | ||
2724 | /* hardreset slave link if existent */ | |
2725 | if (slave && reset == hardreset) { | |
2726 | int tmp; | |
2727 | ||
2728 | if (verbose) | |
a9a79dfe | 2729 | ata_link_info(slave, "hard resetting link\n"); |
b1c72916 TH |
2730 | |
2731 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
f8ec26d0 HR |
2732 | trace_ata_slave_hardreset_begin(slave, classes, |
2733 | deadline); | |
b1c72916 TH |
2734 | tmp = ata_do_reset(slave, reset, classes, deadline, |
2735 | false); | |
f8ec26d0 | 2736 | trace_ata_slave_hardreset_end(slave, classes, tmp); |
b1c72916 TH |
2737 | switch (tmp) { |
2738 | case -EAGAIN: | |
2739 | rc = -EAGAIN; | |
e06abcc6 | 2740 | break; |
b1c72916 TH |
2741 | case 0: |
2742 | break; | |
2743 | default: | |
2744 | failed_link = slave; | |
2745 | rc = tmp; | |
2746 | goto fail; | |
2747 | } | |
2748 | } | |
022bdb07 | 2749 | |
b1c72916 | 2750 | /* perform follow-up SRST if necessary */ |
932648b0 | 2751 | if (reset == hardreset && |
e8411fba | 2752 | ata_eh_followup_srst_needed(link, rc)) { |
932648b0 | 2753 | reset = softreset; |
022bdb07 | 2754 | |
932648b0 | 2755 | if (!reset) { |
a9a79dfe JP |
2756 | ata_link_err(link, |
2757 | "follow-up softreset required but no softreset available\n"); | |
b1c72916 | 2758 | failed_link = link; |
932648b0 TH |
2759 | rc = -EINVAL; |
2760 | goto fail; | |
2761 | } | |
664faf09 | 2762 | |
932648b0 | 2763 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
f8ec26d0 | 2764 | trace_ata_link_softreset_begin(link, classes, deadline); |
b1c72916 | 2765 | rc = ata_do_reset(link, reset, classes, deadline, true); |
f8ec26d0 | 2766 | trace_ata_link_softreset_end(link, classes, rc); |
fe2c4d01 TH |
2767 | if (rc) { |
2768 | failed_link = link; | |
2769 | goto fail; | |
2770 | } | |
664faf09 | 2771 | } |
932648b0 TH |
2772 | } else { |
2773 | if (verbose) | |
a9a79dfe JP |
2774 | ata_link_info(link, |
2775 | "no reset method available, skipping reset\n"); | |
932648b0 TH |
2776 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) |
2777 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2778 | } |
2779 | ||
932648b0 TH |
2780 | /* |
2781 | * Post-reset processing | |
2782 | */ | |
1eca4365 | 2783 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2784 | /* After the reset, the device state is PIO 0 and the |
2785 | * controller state is undefined. Reset also wakes up | |
2786 | * drives from sleeping mode. | |
2787 | */ | |
2788 | dev->pio_mode = XFER_PIO_0; | |
2789 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2790 | |
3b761d3d TH |
2791 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
2792 | continue; | |
2793 | ||
2794 | /* apply class override */ | |
2795 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2796 | classes[dev->devno] = ATA_DEV_ATA; | |
2797 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2798 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
022bdb07 TH |
2799 | } |
2800 | ||
416dc9ed TH |
2801 | /* record current link speed */ |
2802 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2803 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2804 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2805 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2806 | |
dc98c32c TH |
2807 | /* thaw the port */ |
2808 | if (ata_is_host_link(link)) | |
2809 | ata_eh_thaw_port(ap); | |
2810 | ||
f046519f TH |
2811 | /* postreset() should clear hardware SError. Although SError |
2812 | * is cleared during link resume, clearing SError here is | |
2813 | * necessary as some PHYs raise hotplug events after SRST. | |
2814 | * This introduces race condition where hotplug occurs between | |
2815 | * reset and here. This race is mediated by cross checking | |
2816 | * link onlineness and classification result later. | |
2817 | */ | |
b1c72916 | 2818 | if (postreset) { |
416dc9ed | 2819 | postreset(link, classes); |
f8ec26d0 HR |
2820 | trace_ata_link_postreset(link, classes, rc); |
2821 | if (slave) { | |
b1c72916 | 2822 | postreset(slave, classes); |
f8ec26d0 HR |
2823 | trace_ata_slave_postreset(slave, classes, rc); |
2824 | } | |
b1c72916 | 2825 | } |
20952b69 | 2826 | |
1e641060 | 2827 | /* |
8c56cacc TH |
2828 | * Some controllers can't be frozen very well and may set spurious |
2829 | * error conditions during reset. Clear accumulated error | |
2830 | * information and re-thaw the port if frozen. As reset is the | |
2831 | * final recovery action and we cross check link onlineness against | |
2832 | * device classification later, no hotplug event is lost by this. | |
1e641060 | 2833 | */ |
f046519f | 2834 | spin_lock_irqsave(link->ap->lock, flags); |
1e641060 | 2835 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
b1c72916 | 2836 | if (slave) |
1e641060 TH |
2837 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
2838 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
f046519f TH |
2839 | spin_unlock_irqrestore(link->ap->lock, flags); |
2840 | ||
4cb7c6f1 | 2841 | if (ata_port_is_frozen(ap)) |
8c56cacc TH |
2842 | ata_eh_thaw_port(ap); |
2843 | ||
3b761d3d TH |
2844 | /* |
2845 | * Make sure onlineness and classification result correspond. | |
f046519f TH |
2846 | * Hotplug could have happened during reset and some |
2847 | * controllers fail to wait while a drive is spinning up after | |
2848 | * being hotplugged causing misdetection. By cross checking | |
3b761d3d TH |
2849 | * link on/offlineness and classification result, those |
2850 | * conditions can be reliably detected and retried. | |
f046519f | 2851 | */ |
b1c72916 | 2852 | nr_unknown = 0; |
1eca4365 | 2853 | ata_for_each_dev(dev, link, ALL) { |
3b761d3d TH |
2854 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
2855 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe | 2856 | ata_dev_dbg(dev, "link online but device misclassified\n"); |
3b761d3d | 2857 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2858 | nr_unknown++; |
3b761d3d TH |
2859 | } |
2860 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { | |
2861 | if (ata_class_enabled(classes[dev->devno])) | |
a9a79dfe JP |
2862 | ata_dev_dbg(dev, |
2863 | "link offline, clearing class %d to NONE\n", | |
2864 | classes[dev->devno]); | |
3b761d3d TH |
2865 | classes[dev->devno] = ATA_DEV_NONE; |
2866 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe JP |
2867 | ata_dev_dbg(dev, |
2868 | "link status unknown, clearing UNKNOWN to NONE\n"); | |
3b761d3d | 2869 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2870 | } |
f046519f TH |
2871 | } |
2872 | ||
b1c72916 | 2873 | if (classify && nr_unknown) { |
f046519f | 2874 | if (try < max_tries) { |
a9a79dfe JP |
2875 | ata_link_warn(link, |
2876 | "link online but %d devices misclassified, retrying\n", | |
2877 | nr_unknown); | |
b1c72916 | 2878 | failed_link = link; |
f046519f TH |
2879 | rc = -EAGAIN; |
2880 | goto fail; | |
2881 | } | |
a9a79dfe JP |
2882 | ata_link_warn(link, |
2883 | "link online but %d devices misclassified, " | |
2884 | "device detection might fail\n", nr_unknown); | |
f046519f TH |
2885 | } |
2886 | ||
416dc9ed | 2887 | /* reset successful, schedule revalidation */ |
cf480626 | 2888 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2889 | if (slave) |
2890 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
6b7ae954 | 2891 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2892 | ehc->i.action |= ATA_EH_REVALIDATE; |
6b7ae954 | 2893 | link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */ |
ae791c05 | 2894 | |
416dc9ed | 2895 | rc = 0; |
fccb6ea5 TH |
2896 | out: |
2897 | /* clear hotplug flag */ | |
2898 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2899 | if (slave) |
2900 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2901 | |
2902 | spin_lock_irqsave(ap->lock, flags); | |
2903 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2904 | spin_unlock_irqrestore(ap->lock, flags); | |
2905 | ||
022bdb07 | 2906 | return rc; |
416dc9ed TH |
2907 | |
2908 | fail: | |
5958e302 TH |
2909 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2910 | if (!ata_is_host_link(link) && | |
2911 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2912 | rc = -ERESTART; | |
2913 | ||
7a46c078 | 2914 | if (try >= max_tries) { |
8ea7645c TH |
2915 | /* |
2916 | * Thaw host port even if reset failed, so that the port | |
2917 | * can be retried on the next phy event. This risks | |
2918 | * repeated EH runs but seems to be a better tradeoff than | |
2919 | * shutting down a port after a botched hotplug attempt. | |
2920 | */ | |
2921 | if (ata_is_host_link(link)) | |
2922 | ata_eh_thaw_port(ap); | |
416dc9ed | 2923 | goto out; |
8ea7645c | 2924 | } |
416dc9ed TH |
2925 | |
2926 | now = jiffies; | |
2927 | if (time_before(now, deadline)) { | |
2928 | unsigned long delta = deadline - now; | |
2929 | ||
a9a79dfe | 2930 | ata_link_warn(failed_link, |
0a2c0f56 TH |
2931 | "reset failed (errno=%d), retrying in %u secs\n", |
2932 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed | 2933 | |
c0c362b6 | 2934 | ata_eh_release(ap); |
416dc9ed TH |
2935 | while (delta) |
2936 | delta = schedule_timeout_uninterruptible(delta); | |
c0c362b6 | 2937 | ata_eh_acquire(ap); |
416dc9ed TH |
2938 | } |
2939 | ||
7a46c078 GG |
2940 | /* |
2941 | * While disks spinup behind PMP, some controllers fail sending SRST. | |
2942 | * They need to be reset - as well as the PMP - before retrying. | |
2943 | */ | |
2944 | if (rc == -ERESTART) { | |
2945 | if (ata_is_host_link(link)) | |
2946 | ata_eh_thaw_port(ap); | |
2947 | goto out; | |
2948 | } | |
2949 | ||
b1c72916 | 2950 | if (try == max_tries - 1) { |
a07d499b | 2951 | sata_down_spd_limit(link, 0); |
b1c72916 | 2952 | if (slave) |
a07d499b | 2953 | sata_down_spd_limit(slave, 0); |
b1c72916 | 2954 | } else if (rc == -EPIPE) |
a07d499b | 2955 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 2956 | |
416dc9ed TH |
2957 | if (hardreset) |
2958 | reset = hardreset; | |
2959 | goto retry; | |
022bdb07 TH |
2960 | } |
2961 | ||
45fabbb7 EO |
2962 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
2963 | { | |
2964 | struct ata_link *link; | |
2965 | struct ata_device *dev; | |
2966 | unsigned long flags; | |
2967 | ||
2968 | /* | |
2969 | * This function can be thought of as an extended version of | |
2970 | * ata_eh_about_to_do() specially crafted to accommodate the | |
2971 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
2972 | * does not leave the do {} while () loop in ata_eh_recover as | |
2973 | * long as the timeout for a park request to *one* device on | |
2974 | * the port has not expired, and since we still want to pick | |
2975 | * up park requests to other devices on the same port or | |
2976 | * timeout updates for the same device, we have to pull | |
2977 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
2978 | * ourselves at the beginning of each pass over the loop. | |
2979 | * | |
2980 | * Additionally, all write accesses to &ap->park_req_pending | |
16735d02 | 2981 | * through reinit_completion() (see below) or complete_all() |
45fabbb7 EO |
2982 | * (see ata_scsi_park_store()) are protected by the host lock. |
2983 | * As a result we have that park_req_pending.done is zero on | |
2984 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
2985 | * *all* devices on port ap have been pulled into the | |
2986 | * respective eh_context structs. If, and only if, | |
2987 | * park_req_pending.done is non-zero by the time we reach | |
2988 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
2989 | * has been scheduled for at least one of the devices on port | |
2990 | * ap and we have to cycle over the do {} while () loop in | |
2991 | * ata_eh_recover() again. | |
2992 | */ | |
2993 | ||
2994 | spin_lock_irqsave(ap->lock, flags); | |
16735d02 | 2995 | reinit_completion(&ap->park_req_pending); |
1eca4365 TH |
2996 | ata_for_each_link(link, ap, EDGE) { |
2997 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
2998 | struct ata_eh_info *ehi = &link->eh_info; |
2999 | ||
3000 | link->eh_context.i.dev_action[dev->devno] |= | |
3001 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
3002 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
3003 | } | |
3004 | } | |
3005 | spin_unlock_irqrestore(ap->lock, flags); | |
3006 | } | |
3007 | ||
3008 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
3009 | { | |
3010 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
3011 | struct ata_taskfile tf; | |
3012 | unsigned int err_mask; | |
3013 | ||
3014 | ata_tf_init(dev, &tf); | |
3015 | if (park) { | |
3016 | ehc->unloaded_mask |= 1 << dev->devno; | |
3017 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
3018 | tf.feature = 0x44; | |
3019 | tf.lbal = 0x4c; | |
3020 | tf.lbam = 0x4e; | |
3021 | tf.lbah = 0x55; | |
3022 | } else { | |
3023 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
3024 | tf.command = ATA_CMD_CHK_POWER; | |
3025 | } | |
3026 | ||
3027 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
bd18bc04 | 3028 | tf.protocol = ATA_PROT_NODATA; |
45fabbb7 EO |
3029 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
3030 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
a9a79dfe | 3031 | ata_dev_err(dev, "head unload failed!\n"); |
45fabbb7 EO |
3032 | ehc->unloaded_mask &= ~(1 << dev->devno); |
3033 | } | |
3034 | } | |
3035 | ||
0260731f | 3036 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 3037 | struct ata_device **r_failed_dev) |
022bdb07 | 3038 | { |
0260731f TH |
3039 | struct ata_port *ap = link->ap; |
3040 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 3041 | struct ata_device *dev; |
8c3c52a8 | 3042 | unsigned int new_mask = 0; |
084fe639 | 3043 | unsigned long flags; |
f58229f8 | 3044 | int rc = 0; |
022bdb07 | 3045 | |
8c3c52a8 TH |
3046 | /* For PATA drive side cable detection to work, IDENTIFY must |
3047 | * be done backwards such that PDIAG- is released by the slave | |
3048 | * device before the master device is identified. | |
3049 | */ | |
1eca4365 | 3050 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
3051 | unsigned int action = ata_eh_dev_action(dev); |
3052 | unsigned int readid_flags = 0; | |
022bdb07 | 3053 | |
bff04647 TH |
3054 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
3055 | readid_flags |= ATA_READID_POSTRESET; | |
3056 | ||
9666f400 | 3057 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
3058 | WARN_ON(dev->class == ATA_DEV_PMP); |
3059 | ||
71d7b6e5 NC |
3060 | /* |
3061 | * The link may be in a deep sleep, wake it up. | |
3062 | * | |
3063 | * If the link is in deep sleep, ata_phys_link_offline() | |
3064 | * will return true, causing the revalidation to fail, | |
3065 | * which leads to a (potentially) needless hard reset. | |
3066 | * | |
3067 | * ata_eh_recover() will later restore the link policy | |
3068 | * to ap->target_lpm_policy after revalidation is done. | |
3069 | */ | |
3070 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { | |
3071 | rc = ata_eh_set_lpm(link, ATA_LPM_MAX_POWER, | |
3072 | r_failed_dev); | |
3073 | if (rc) | |
3074 | goto err; | |
3075 | } | |
3076 | ||
b1c72916 | 3077 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 3078 | rc = -EIO; |
8c3c52a8 | 3079 | goto err; |
022bdb07 TH |
3080 | } |
3081 | ||
0260731f | 3082 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
3083 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
3084 | readid_flags); | |
022bdb07 | 3085 | if (rc) |
8c3c52a8 | 3086 | goto err; |
022bdb07 | 3087 | |
0260731f | 3088 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 3089 | |
baa1e78a TH |
3090 | /* Configuration may have changed, reconfigure |
3091 | * transfer mode. | |
3092 | */ | |
3093 | ehc->i.flags |= ATA_EHI_SETMODE; | |
3094 | ||
3057ac3c | 3095 | /* schedule the scsi_rescan_device() here */ |
ad72cf98 | 3096 | schedule_work(&(ap->scsi_rescan_task)); |
084fe639 TH |
3097 | } else if (dev->class == ATA_DEV_UNKNOWN && |
3098 | ehc->tries[dev->devno] && | |
3099 | ata_class_enabled(ehc->classes[dev->devno])) { | |
842faa6c TH |
3100 | /* Temporarily set dev->class, it will be |
3101 | * permanently set once all configurations are | |
3102 | * complete. This is necessary because new | |
3103 | * device configuration is done in two | |
3104 | * separate loops. | |
3105 | */ | |
084fe639 TH |
3106 | dev->class = ehc->classes[dev->devno]; |
3107 | ||
633273a3 TH |
3108 | if (dev->class == ATA_DEV_PMP) |
3109 | rc = sata_pmp_attach(dev); | |
3110 | else | |
3111 | rc = ata_dev_read_id(dev, &dev->class, | |
3112 | readid_flags, dev->id); | |
842faa6c TH |
3113 | |
3114 | /* read_id might have changed class, store and reset */ | |
3115 | ehc->classes[dev->devno] = dev->class; | |
3116 | dev->class = ATA_DEV_UNKNOWN; | |
3117 | ||
8c3c52a8 TH |
3118 | switch (rc) { |
3119 | case 0: | |
99cf610a TH |
3120 | /* clear error info accumulated during probe */ |
3121 | ata_ering_clear(&dev->ering); | |
f58229f8 | 3122 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
3123 | break; |
3124 | case -ENOENT: | |
55a8e2c8 TH |
3125 | /* IDENTIFY was issued to non-existent |
3126 | * device. No need to reset. Just | |
842faa6c | 3127 | * thaw and ignore the device. |
55a8e2c8 TH |
3128 | */ |
3129 | ata_eh_thaw_port(ap); | |
084fe639 | 3130 | break; |
8c3c52a8 | 3131 | default: |
8c3c52a8 | 3132 | goto err; |
084fe639 | 3133 | } |
8c3c52a8 TH |
3134 | } |
3135 | } | |
084fe639 | 3136 | |
c1c4e8d5 | 3137 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
3138 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
3139 | if (ap->ops->cable_detect) | |
3140 | ap->cbl = ap->ops->cable_detect(ap); | |
3141 | ata_force_cbl(ap); | |
3142 | } | |
c1c4e8d5 | 3143 | |
8c3c52a8 TH |
3144 | /* Configure new devices forward such that user doesn't see |
3145 | * device detection messages backwards. | |
3146 | */ | |
1eca4365 | 3147 | ata_for_each_dev(dev, link, ALL) { |
4f7c2874 | 3148 | if (!(new_mask & (1 << dev->devno))) |
8c3c52a8 TH |
3149 | continue; |
3150 | ||
842faa6c TH |
3151 | dev->class = ehc->classes[dev->devno]; |
3152 | ||
4f7c2874 TH |
3153 | if (dev->class == ATA_DEV_PMP) |
3154 | continue; | |
3155 | ||
8c3c52a8 TH |
3156 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
3157 | rc = ata_dev_configure(dev); | |
3158 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
842faa6c TH |
3159 | if (rc) { |
3160 | dev->class = ATA_DEV_UNKNOWN; | |
8c3c52a8 | 3161 | goto err; |
842faa6c | 3162 | } |
8c3c52a8 TH |
3163 | |
3164 | spin_lock_irqsave(ap->lock, flags); | |
3165 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
3166 | spin_unlock_irqrestore(ap->lock, flags); | |
3167 | ||
3168 | /* new device discovered, configure xfermode */ | |
3169 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
3170 | } |
3171 | ||
8c3c52a8 | 3172 | return 0; |
022bdb07 | 3173 | |
8c3c52a8 TH |
3174 | err: |
3175 | *r_failed_dev = dev; | |
022bdb07 TH |
3176 | return rc; |
3177 | } | |
3178 | ||
6f1d1e3a TH |
3179 | /** |
3180 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
3181 | * @link: link on which timings will be programmed | |
98a1708d | 3182 | * @r_failed_dev: out parameter for failed device |
6f1d1e3a TH |
3183 | * |
3184 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3185 | * ata_set_mode() fails, pointer to the failing device is | |
3186 | * returned in @r_failed_dev. | |
3187 | * | |
3188 | * LOCKING: | |
3189 | * PCI/etc. bus probe sem. | |
3190 | * | |
3191 | * RETURNS: | |
3192 | * 0 on success, negative errno otherwise | |
3193 | */ | |
3194 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
3195 | { | |
3196 | struct ata_port *ap = link->ap; | |
00115e0f TH |
3197 | struct ata_device *dev; |
3198 | int rc; | |
6f1d1e3a | 3199 | |
76326ac1 | 3200 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 3201 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
3202 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
3203 | struct ata_ering_entry *ent; | |
3204 | ||
3205 | ent = ata_ering_top(&dev->ering); | |
3206 | if (ent) | |
3207 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
3208 | } | |
3209 | } | |
3210 | ||
6f1d1e3a TH |
3211 | /* has private set_mode? */ |
3212 | if (ap->ops->set_mode) | |
00115e0f TH |
3213 | rc = ap->ops->set_mode(link, r_failed_dev); |
3214 | else | |
3215 | rc = ata_do_set_mode(link, r_failed_dev); | |
3216 | ||
3217 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 3218 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
3219 | struct ata_eh_context *ehc = &link->eh_context; |
3220 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
3221 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
3222 | ||
3223 | if (dev->xfer_mode != saved_xfer_mode || | |
3224 | ata_ncq_enabled(dev) != saved_ncq) | |
3225 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
3226 | } | |
3227 | ||
3228 | return rc; | |
6f1d1e3a TH |
3229 | } |
3230 | ||
11fc33da TH |
3231 | /** |
3232 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
3233 | * @dev: ATAPI device to clear UA for | |
3234 | * | |
3235 | * Resets and other operations can make an ATAPI device raise | |
3236 | * UNIT ATTENTION which causes the next operation to fail. This | |
3237 | * function clears UA. | |
3238 | * | |
3239 | * LOCKING: | |
3240 | * EH context (may sleep). | |
3241 | * | |
3242 | * RETURNS: | |
3243 | * 0 on success, -errno on failure. | |
3244 | */ | |
3245 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
3246 | { | |
3247 | int i; | |
3248 | ||
3249 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 3250 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
3251 | u8 sense_key = 0; |
3252 | unsigned int err_mask; | |
3253 | ||
3254 | err_mask = atapi_eh_tur(dev, &sense_key); | |
3255 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3256 | ata_dev_warn(dev, |
3257 | "TEST_UNIT_READY failed (err_mask=0x%x)\n", | |
3258 | err_mask); | |
11fc33da TH |
3259 | return -EIO; |
3260 | } | |
3261 | ||
3262 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
3263 | return 0; | |
3264 | ||
3265 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
3266 | if (err_mask) { | |
a9a79dfe | 3267 | ata_dev_warn(dev, "failed to clear " |
11fc33da TH |
3268 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); |
3269 | return -EIO; | |
3270 | } | |
3271 | } | |
3272 | ||
a9a79dfe JP |
3273 | ata_dev_warn(dev, "UNIT ATTENTION persists after %d tries\n", |
3274 | ATA_EH_UA_TRIES); | |
11fc33da TH |
3275 | |
3276 | return 0; | |
3277 | } | |
3278 | ||
6013efd8 TH |
3279 | /** |
3280 | * ata_eh_maybe_retry_flush - Retry FLUSH if necessary | |
3281 | * @dev: ATA device which may need FLUSH retry | |
3282 | * | |
3283 | * If @dev failed FLUSH, it needs to be reported upper layer | |
3284 | * immediately as it means that @dev failed to remap and already | |
3285 | * lost at least a sector and further FLUSH retrials won't make | |
3286 | * any difference to the lost sector. However, if FLUSH failed | |
3287 | * for other reasons, for example transmission error, FLUSH needs | |
3288 | * to be retried. | |
3289 | * | |
3290 | * This function determines whether FLUSH failure retry is | |
3291 | * necessary and performs it if so. | |
3292 | * | |
3293 | * RETURNS: | |
3294 | * 0 if EH can continue, -errno if EH needs to be repeated. | |
3295 | */ | |
3296 | static int ata_eh_maybe_retry_flush(struct ata_device *dev) | |
3297 | { | |
3298 | struct ata_link *link = dev->link; | |
3299 | struct ata_port *ap = link->ap; | |
3300 | struct ata_queued_cmd *qc; | |
3301 | struct ata_taskfile tf; | |
3302 | unsigned int err_mask; | |
3303 | int rc = 0; | |
3304 | ||
3305 | /* did flush fail for this device? */ | |
3306 | if (!ata_tag_valid(link->active_tag)) | |
3307 | return 0; | |
3308 | ||
3309 | qc = __ata_qc_from_tag(ap, link->active_tag); | |
3310 | if (qc->dev != dev || (qc->tf.command != ATA_CMD_FLUSH_EXT && | |
3311 | qc->tf.command != ATA_CMD_FLUSH)) | |
3312 | return 0; | |
3313 | ||
3314 | /* if the device failed it, it should be reported to upper layers */ | |
3315 | if (qc->err_mask & AC_ERR_DEV) | |
3316 | return 0; | |
3317 | ||
3318 | /* flush failed for some other reason, give it another shot */ | |
3319 | ata_tf_init(dev, &tf); | |
3320 | ||
3321 | tf.command = qc->tf.command; | |
3322 | tf.flags |= ATA_TFLAG_DEVICE; | |
3323 | tf.protocol = ATA_PROT_NODATA; | |
3324 | ||
a9a79dfe | 3325 | ata_dev_warn(dev, "retrying FLUSH 0x%x Emask 0x%x\n", |
6013efd8 TH |
3326 | tf.command, qc->err_mask); |
3327 | ||
3328 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
3329 | if (!err_mask) { | |
3330 | /* | |
3331 | * FLUSH is complete but there's no way to | |
3332 | * successfully complete a failed command from EH. | |
3333 | * Making sure retry is allowed at least once and | |
3334 | * retrying it should do the trick - whatever was in | |
3335 | * the cache is already on the platter and this won't | |
3336 | * cause infinite loop. | |
3337 | */ | |
3338 | qc->scsicmd->allowed = max(qc->scsicmd->allowed, 1); | |
3339 | } else { | |
a9a79dfe | 3340 | ata_dev_warn(dev, "FLUSH failed Emask 0x%x\n", |
6013efd8 TH |
3341 | err_mask); |
3342 | rc = -EIO; | |
3343 | ||
3344 | /* if device failed it, report it to upper layers */ | |
3345 | if (err_mask & AC_ERR_DEV) { | |
3346 | qc->err_mask |= AC_ERR_DEV; | |
3347 | qc->result_tf = tf; | |
4cb7c6f1 | 3348 | if (!ata_port_is_frozen(ap)) |
6013efd8 TH |
3349 | rc = 0; |
3350 | } | |
3351 | } | |
3352 | return rc; | |
3353 | } | |
3354 | ||
6b7ae954 TH |
3355 | /** |
3356 | * ata_eh_set_lpm - configure SATA interface power management | |
3357 | * @link: link to configure power management | |
3358 | * @policy: the link power management policy | |
3359 | * @r_failed_dev: out parameter for failed device | |
3360 | * | |
3361 | * Enable SATA Interface power management. This will enable | |
f4ac6476 HG |
3362 | * Device Interface Power Management (DIPM) for min_power and |
3363 | * medium_power_with_dipm policies, and then call driver specific | |
3364 | * callbacks for enabling Host Initiated Power management. | |
6b7ae954 TH |
3365 | * |
3366 | * LOCKING: | |
3367 | * EH context. | |
3368 | * | |
3369 | * RETURNS: | |
3370 | * 0 on success, -errno on failure. | |
3371 | */ | |
3372 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
3373 | struct ata_device **r_failed_dev) | |
3374 | { | |
6c8ea89c | 3375 | struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL; |
6b7ae954 TH |
3376 | struct ata_eh_context *ehc = &link->eh_context; |
3377 | struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; | |
e5005b15 | 3378 | enum ata_lpm_policy old_policy = link->lpm_policy; |
5f6f12cc | 3379 | bool no_dipm = link->ap->flags & ATA_FLAG_NO_DIPM; |
6b7ae954 TH |
3380 | unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; |
3381 | unsigned int err_mask; | |
3382 | int rc; | |
3383 | ||
3384 | /* if the link or host doesn't do LPM, noop */ | |
4c9029e7 BZ |
3385 | if (!IS_ENABLED(CONFIG_SATA_HOST) || |
3386 | (link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) | |
6b7ae954 TH |
3387 | return 0; |
3388 | ||
3389 | /* | |
3390 | * DIPM is enabled only for MIN_POWER as some devices | |
3391 | * misbehave when the host NACKs transition to SLUMBER. Order | |
3392 | * device and link configurations such that the host always | |
3393 | * allows DIPM requests. | |
3394 | */ | |
3395 | ata_for_each_dev(dev, link, ENABLED) { | |
3396 | bool hipm = ata_id_has_hipm(dev->id); | |
ae01b249 | 3397 | bool dipm = ata_id_has_dipm(dev->id) && !no_dipm; |
6b7ae954 TH |
3398 | |
3399 | /* find the first enabled and LPM enabled devices */ | |
3400 | if (!link_dev) | |
3401 | link_dev = dev; | |
3402 | ||
3403 | if (!lpm_dev && (hipm || dipm)) | |
3404 | lpm_dev = dev; | |
3405 | ||
3406 | hints &= ~ATA_LPM_EMPTY; | |
3407 | if (!hipm) | |
3408 | hints &= ~ATA_LPM_HIPM; | |
3409 | ||
3410 | /* disable DIPM before changing link config */ | |
f4ac6476 | 3411 | if (policy < ATA_LPM_MED_POWER_WITH_DIPM && dipm) { |
6b7ae954 TH |
3412 | err_mask = ata_dev_set_feature(dev, |
3413 | SETFEATURES_SATA_DISABLE, SATA_DIPM); | |
3414 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3415 | ata_dev_warn(dev, |
3416 | "failed to disable DIPM, Emask 0x%x\n", | |
3417 | err_mask); | |
6b7ae954 TH |
3418 | rc = -EIO; |
3419 | goto fail; | |
3420 | } | |
3421 | } | |
3422 | } | |
3423 | ||
6c8ea89c TH |
3424 | if (ap) { |
3425 | rc = ap->ops->set_lpm(link, policy, hints); | |
3426 | if (!rc && ap->slave_link) | |
3427 | rc = ap->ops->set_lpm(ap->slave_link, policy, hints); | |
3428 | } else | |
3429 | rc = sata_pmp_set_lpm(link, policy, hints); | |
6b7ae954 TH |
3430 | |
3431 | /* | |
3432 | * Attribute link config failure to the first (LPM) enabled | |
3433 | * device on the link. | |
3434 | */ | |
3435 | if (rc) { | |
3436 | if (rc == -EOPNOTSUPP) { | |
3437 | link->flags |= ATA_LFLAG_NO_LPM; | |
3438 | return 0; | |
3439 | } | |
3440 | dev = lpm_dev ? lpm_dev : link_dev; | |
3441 | goto fail; | |
3442 | } | |
3443 | ||
e5005b15 TH |
3444 | /* |
3445 | * Low level driver acked the transition. Issue DIPM command | |
3446 | * with the new policy set. | |
3447 | */ | |
3448 | link->lpm_policy = policy; | |
3449 | if (ap && ap->slave_link) | |
3450 | ap->slave_link->lpm_policy = policy; | |
3451 | ||
6b7ae954 TH |
3452 | /* host config updated, enable DIPM if transitioning to MIN_POWER */ |
3453 | ata_for_each_dev(dev, link, ENABLED) { | |
f4ac6476 | 3454 | if (policy >= ATA_LPM_MED_POWER_WITH_DIPM && !no_dipm && |
ae01b249 | 3455 | ata_id_has_dipm(dev->id)) { |
6b7ae954 TH |
3456 | err_mask = ata_dev_set_feature(dev, |
3457 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
3458 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe | 3459 | ata_dev_warn(dev, |
6b7ae954 TH |
3460 | "failed to enable DIPM, Emask 0x%x\n", |
3461 | err_mask); | |
3462 | rc = -EIO; | |
3463 | goto fail; | |
3464 | } | |
3465 | } | |
3466 | } | |
3467 | ||
09c5b480 GM |
3468 | link->last_lpm_change = jiffies; |
3469 | link->flags |= ATA_LFLAG_CHANGED; | |
3470 | ||
6b7ae954 TH |
3471 | return 0; |
3472 | ||
3473 | fail: | |
e5005b15 TH |
3474 | /* restore the old policy */ |
3475 | link->lpm_policy = old_policy; | |
3476 | if (ap && ap->slave_link) | |
3477 | ap->slave_link->lpm_policy = old_policy; | |
3478 | ||
6b7ae954 TH |
3479 | /* if no device or only one more chance is left, disable LPM */ |
3480 | if (!dev || ehc->tries[dev->devno] <= 2) { | |
a9a79dfe | 3481 | ata_link_warn(link, "disabling LPM on the link\n"); |
6b7ae954 TH |
3482 | link->flags |= ATA_LFLAG_NO_LPM; |
3483 | } | |
3484 | if (r_failed_dev) | |
3485 | *r_failed_dev = dev; | |
3486 | return rc; | |
3487 | } | |
3488 | ||
8a745f1f | 3489 | int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 3490 | { |
f58229f8 TH |
3491 | struct ata_device *dev; |
3492 | int cnt = 0; | |
022bdb07 | 3493 | |
1eca4365 TH |
3494 | ata_for_each_dev(dev, link, ENABLED) |
3495 | cnt++; | |
022bdb07 TH |
3496 | return cnt; |
3497 | } | |
3498 | ||
0260731f | 3499 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 3500 | { |
f58229f8 TH |
3501 | struct ata_device *dev; |
3502 | int cnt = 0; | |
084fe639 | 3503 | |
1eca4365 | 3504 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 3505 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
3506 | cnt++; |
3507 | return cnt; | |
3508 | } | |
3509 | ||
0260731f | 3510 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 3511 | { |
672b2d65 | 3512 | struct ata_port *ap = link->ap; |
0260731f | 3513 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 3514 | struct ata_device *dev; |
084fe639 | 3515 | |
f9df58cb TH |
3516 | /* skip disabled links */ |
3517 | if (link->flags & ATA_LFLAG_DISABLED) | |
3518 | return 1; | |
3519 | ||
e2f3d75f TH |
3520 | /* skip if explicitly requested */ |
3521 | if (ehc->i.flags & ATA_EHI_NO_RECOVERY) | |
3522 | return 1; | |
3523 | ||
672b2d65 | 3524 | /* thaw frozen port and recover failed devices */ |
4cb7c6f1 | 3525 | if (ata_port_is_frozen(ap) || ata_link_nr_enabled(link)) |
672b2d65 TH |
3526 | return 0; |
3527 | ||
3528 | /* reset at least once if reset is requested */ | |
3529 | if ((ehc->i.action & ATA_EH_RESET) && | |
3530 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
3531 | return 0; |
3532 | ||
3533 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 3534 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
3535 | if (dev->class == ATA_DEV_UNKNOWN && |
3536 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
3537 | return 0; | |
3538 | } | |
3539 | ||
3540 | return 1; | |
3541 | } | |
3542 | ||
c2c7a89c TH |
3543 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
3544 | { | |
3545 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
3546 | u64 now = get_jiffies_64(); | |
3547 | int *trials = void_arg; | |
3548 | ||
6868225e LM |
3549 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || |
3550 | (ent->timestamp < now - min(now, interval))) | |
c2c7a89c TH |
3551 | return -1; |
3552 | ||
3553 | (*trials)++; | |
3554 | return 0; | |
3555 | } | |
3556 | ||
02c05a27 TH |
3557 | static int ata_eh_schedule_probe(struct ata_device *dev) |
3558 | { | |
3559 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3560 | struct ata_link *link = ata_dev_phys_link(dev); |
3561 | int trials = 0; | |
02c05a27 TH |
3562 | |
3563 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3564 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3565 | return 0; | |
3566 | ||
3567 | ata_eh_detach_dev(dev); | |
3568 | ata_dev_init(dev); | |
3569 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3570 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3571 | ehc->saved_xfer_mode[dev->devno] = 0; |
3572 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3573 | |
6b7ae954 | 3574 | /* the link maybe in a deep sleep, wake it up */ |
6c8ea89c TH |
3575 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { |
3576 | if (ata_is_host_link(link)) | |
3577 | link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER, | |
3578 | ATA_LPM_EMPTY); | |
3579 | else | |
3580 | sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER, | |
3581 | ATA_LPM_EMPTY); | |
3582 | } | |
6b7ae954 | 3583 | |
c2c7a89c TH |
3584 | /* Record and count probe trials on the ering. The specific |
3585 | * error mask used is irrelevant. Because a successful device | |
3586 | * detection clears the ering, this count accumulates only if | |
3587 | * there are consecutive failed probes. | |
3588 | * | |
3589 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3590 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3591 | * forced to 1.5Gbps. | |
3592 | * | |
3593 | * This is to work around cases where failed link speed | |
3594 | * negotiation results in device misdetection leading to | |
3595 | * infinite DEVXCHG or PHRDY CHG events. | |
3596 | */ | |
3597 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3598 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3599 | ||
3600 | if (trials > ATA_EH_PROBE_TRIALS) | |
3601 | sata_down_spd_limit(link, 1); | |
3602 | ||
02c05a27 TH |
3603 | return 1; |
3604 | } | |
3605 | ||
9b1e2658 | 3606 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3607 | { |
9af5c9c9 | 3608 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3609 | |
cf9a590a TH |
3610 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3611 | * The requester is responsible for ensuring forward progress. | |
3612 | */ | |
3613 | if (err != -EAGAIN) | |
3614 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3615 | |
3616 | switch (err) { | |
3617 | case -ENODEV: | |
3618 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3619 | ehc->i.probe_mask |= (1 << dev->devno); | |
df561f66 | 3620 | fallthrough; |
fee7ca72 TH |
3621 | case -EINVAL: |
3622 | /* give it just one more chance */ | |
3623 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
df561f66 | 3624 | fallthrough; |
fee7ca72 | 3625 | case -EIO: |
d89293ab | 3626 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3627 | /* This is the last chance, better to slow |
3628 | * down than lose it. | |
3629 | */ | |
a07d499b | 3630 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3631 | if (dev->pio_mode > XFER_PIO_0) |
3632 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3633 | } |
3634 | } | |
3635 | ||
3636 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3637 | /* disable device if it has used up all its chances */ | |
3638 | ata_dev_disable(dev); | |
3639 | ||
3640 | /* detach if offline */ | |
b1c72916 | 3641 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3642 | ata_eh_detach_dev(dev); |
3643 | ||
02c05a27 | 3644 | /* schedule probe if necessary */ |
87fbc5a0 | 3645 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3646 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3647 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3648 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3649 | } | |
9b1e2658 TH |
3650 | |
3651 | return 1; | |
fee7ca72 | 3652 | } else { |
cf480626 | 3653 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3654 | return 0; |
fee7ca72 TH |
3655 | } |
3656 | } | |
3657 | ||
022bdb07 TH |
3658 | /** |
3659 | * ata_eh_recover - recover host port after error | |
3660 | * @ap: host port to recover | |
f5914a46 | 3661 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3662 | * @softreset: softreset method (can be NULL) |
3663 | * @hardreset: hardreset method (can be NULL) | |
3664 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3665 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3666 | * |
3667 | * This is the alpha and omega, eum and yang, heart and soul of | |
3668 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3669 | * recover each link and hotplug requests are recorded in the |
3670 | * link's eh_context. This function executes all the operations | |
3671 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3672 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3673 | * |
3674 | * LOCKING: | |
3675 | * Kernel thread context (may sleep). | |
3676 | * | |
3677 | * RETURNS: | |
3678 | * 0 on success, -errno on failure. | |
3679 | */ | |
fb7fd614 TH |
3680 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3681 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3682 | ata_postreset_fn_t postreset, | |
3683 | struct ata_link **r_failed_link) | |
022bdb07 | 3684 | { |
9b1e2658 | 3685 | struct ata_link *link; |
022bdb07 | 3686 | struct ata_device *dev; |
6b7ae954 | 3687 | int rc, nr_fails; |
45fabbb7 | 3688 | unsigned long flags, deadline; |
022bdb07 | 3689 | |
022bdb07 | 3690 | /* prep for recovery */ |
1eca4365 | 3691 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3692 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3693 | |
f9df58cb TH |
3694 | /* re-enable link? */ |
3695 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3696 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3697 | spin_lock_irqsave(ap->lock, flags); | |
3698 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3699 | spin_unlock_irqrestore(ap->lock, flags); | |
3700 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3701 | } | |
3702 | ||
1eca4365 | 3703 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3704 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3705 | ehc->tries[dev->devno] = 1; | |
3706 | else | |
3707 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3708 | |
9b1e2658 TH |
3709 | /* collect port action mask recorded in dev actions */ |
3710 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3711 | ~ATA_EH_PERDEV_MASK; | |
3712 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3713 | ||
3714 | /* process hotplug request */ | |
3715 | if (dev->flags & ATA_DFLAG_DETACH) | |
3716 | ata_eh_detach_dev(dev); | |
3717 | ||
02c05a27 TH |
3718 | /* schedule probe if necessary */ |
3719 | if (!ata_dev_enabled(dev)) | |
3720 | ata_eh_schedule_probe(dev); | |
084fe639 | 3721 | } |
022bdb07 TH |
3722 | } |
3723 | ||
3724 | retry: | |
022bdb07 TH |
3725 | rc = 0; |
3726 | ||
aeb2ecd6 | 3727 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3728 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3729 | goto out; |
3730 | ||
9b1e2658 | 3731 | /* prep for EH */ |
1eca4365 | 3732 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3733 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3734 | |
9b1e2658 TH |
3735 | /* skip EH if possible. */ |
3736 | if (ata_eh_skip_recovery(link)) | |
3737 | ehc->i.action = 0; | |
3738 | ||
1eca4365 | 3739 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3740 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3741 | } | |
084fe639 | 3742 | |
022bdb07 | 3743 | /* reset */ |
1eca4365 | 3744 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3745 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3746 | |
dc98c32c TH |
3747 | if (!(ehc->i.action & ATA_EH_RESET)) |
3748 | continue; | |
9b1e2658 | 3749 | |
dc98c32c TH |
3750 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3751 | prereset, softreset, hardreset, postreset); | |
3752 | if (rc) { | |
a9a79dfe | 3753 | ata_link_err(link, "reset failed, giving up\n"); |
dc98c32c | 3754 | goto out; |
022bdb07 | 3755 | } |
022bdb07 TH |
3756 | } |
3757 | ||
45fabbb7 EO |
3758 | do { |
3759 | unsigned long now; | |
3760 | ||
3761 | /* | |
3762 | * clears ATA_EH_PARK in eh_info and resets | |
3763 | * ap->park_req_pending | |
3764 | */ | |
3765 | ata_eh_pull_park_action(ap); | |
3766 | ||
3767 | deadline = jiffies; | |
1eca4365 TH |
3768 | ata_for_each_link(link, ap, EDGE) { |
3769 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3770 | struct ata_eh_context *ehc = &link->eh_context; |
3771 | unsigned long tmp; | |
3772 | ||
9162c657 HR |
3773 | if (dev->class != ATA_DEV_ATA && |
3774 | dev->class != ATA_DEV_ZAC) | |
45fabbb7 EO |
3775 | continue; |
3776 | if (!(ehc->i.dev_action[dev->devno] & | |
3777 | ATA_EH_PARK)) | |
3778 | continue; | |
3779 | tmp = dev->unpark_deadline; | |
3780 | if (time_before(deadline, tmp)) | |
3781 | deadline = tmp; | |
3782 | else if (time_before_eq(tmp, jiffies)) | |
3783 | continue; | |
3784 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3785 | continue; | |
3786 | ||
3787 | ata_eh_park_issue_cmd(dev, 1); | |
3788 | } | |
3789 | } | |
3790 | ||
3791 | now = jiffies; | |
3792 | if (time_before_eq(deadline, now)) | |
3793 | break; | |
3794 | ||
c0c362b6 | 3795 | ata_eh_release(ap); |
45fabbb7 EO |
3796 | deadline = wait_for_completion_timeout(&ap->park_req_pending, |
3797 | deadline - now); | |
c0c362b6 | 3798 | ata_eh_acquire(ap); |
45fabbb7 | 3799 | } while (deadline); |
1eca4365 TH |
3800 | ata_for_each_link(link, ap, EDGE) { |
3801 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3802 | if (!(link->eh_context.unloaded_mask & |
3803 | (1 << dev->devno))) | |
3804 | continue; | |
3805 | ||
3806 | ata_eh_park_issue_cmd(dev, 0); | |
3807 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3808 | } | |
3809 | } | |
3810 | ||
9b1e2658 | 3811 | /* the rest */ |
6b7ae954 TH |
3812 | nr_fails = 0; |
3813 | ata_for_each_link(link, ap, PMP_FIRST) { | |
9b1e2658 | 3814 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3815 | |
6b7ae954 TH |
3816 | if (sata_pmp_attached(ap) && ata_is_host_link(link)) |
3817 | goto config_lpm; | |
3818 | ||
9b1e2658 TH |
3819 | /* revalidate existing devices and attach new ones */ |
3820 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3821 | if (rc) |
6b7ae954 | 3822 | goto rest_fail; |
022bdb07 | 3823 | |
633273a3 TH |
3824 | /* if PMP got attached, return, pmp EH will take care of it */ |
3825 | if (link->device->class == ATA_DEV_PMP) { | |
3826 | ehc->i.action = 0; | |
3827 | return 0; | |
3828 | } | |
3829 | ||
9b1e2658 TH |
3830 | /* configure transfer mode if necessary */ |
3831 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3832 | rc = ata_set_mode(link, &dev); | |
3833 | if (rc) | |
6b7ae954 | 3834 | goto rest_fail; |
9b1e2658 TH |
3835 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
3836 | } | |
3837 | ||
11fc33da TH |
3838 | /* If reset has been issued, clear UA to avoid |
3839 | * disrupting the current users of the device. | |
3840 | */ | |
3841 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3842 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3843 | if (dev->class != ATA_DEV_ATAPI) |
3844 | continue; | |
3845 | rc = atapi_eh_clear_ua(dev); | |
3846 | if (rc) | |
6b7ae954 | 3847 | goto rest_fail; |
21334205 AL |
3848 | if (zpodd_dev_enabled(dev)) |
3849 | zpodd_post_poweron(dev); | |
11fc33da TH |
3850 | } |
3851 | } | |
3852 | ||
6013efd8 TH |
3853 | /* retry flush if necessary */ |
3854 | ata_for_each_dev(dev, link, ALL) { | |
9162c657 HR |
3855 | if (dev->class != ATA_DEV_ATA && |
3856 | dev->class != ATA_DEV_ZAC) | |
6013efd8 TH |
3857 | continue; |
3858 | rc = ata_eh_maybe_retry_flush(dev); | |
3859 | if (rc) | |
6b7ae954 | 3860 | goto rest_fail; |
6013efd8 TH |
3861 | } |
3862 | ||
6b7ae954 | 3863 | config_lpm: |
11fc33da | 3864 | /* configure link power saving */ |
6b7ae954 TH |
3865 | if (link->lpm_policy != ap->target_lpm_policy) { |
3866 | rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev); | |
3867 | if (rc) | |
3868 | goto rest_fail; | |
3869 | } | |
ca77329f | 3870 | |
9b1e2658 TH |
3871 | /* this link is okay now */ |
3872 | ehc->i.flags = 0; | |
3873 | continue; | |
022bdb07 | 3874 | |
6b7ae954 TH |
3875 | rest_fail: |
3876 | nr_fails++; | |
3877 | if (dev) | |
3878 | ata_eh_handle_dev_fail(dev, rc); | |
022bdb07 | 3879 | |
4cb7c6f1 | 3880 | if (ata_port_is_frozen(ap)) { |
b06ce3e5 TH |
3881 | /* PMP reset requires working host port. |
3882 | * Can't retry if it's frozen. | |
3883 | */ | |
071f44b1 | 3884 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3885 | goto out; |
9b1e2658 | 3886 | break; |
b06ce3e5 | 3887 | } |
022bdb07 TH |
3888 | } |
3889 | ||
6b7ae954 | 3890 | if (nr_fails) |
9b1e2658 | 3891 | goto retry; |
022bdb07 | 3892 | |
9b1e2658 TH |
3893 | out: |
3894 | if (rc && r_failed_link) | |
3895 | *r_failed_link = link; | |
3896 | ||
022bdb07 TH |
3897 | return rc; |
3898 | } | |
3899 | ||
3900 | /** | |
3901 | * ata_eh_finish - finish up EH | |
3902 | * @ap: host port to finish EH for | |
3903 | * | |
3904 | * Recovery is complete. Clean up EH states and retry or finish | |
3905 | * failed qcs. | |
3906 | * | |
3907 | * LOCKING: | |
3908 | * None. | |
3909 | */ | |
fb7fd614 | 3910 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 | 3911 | { |
258c4e5c | 3912 | struct ata_queued_cmd *qc; |
022bdb07 TH |
3913 | int tag; |
3914 | ||
3915 | /* retry or finish qcs */ | |
258c4e5c | 3916 | ata_qc_for_each_raw(ap, qc, tag) { |
87629312 | 3917 | if (!(qc->flags & ATA_QCFLAG_EH)) |
022bdb07 TH |
3918 | continue; |
3919 | ||
3920 | if (qc->err_mask) { | |
3921 | /* FIXME: Once EH migration is complete, | |
3922 | * generate sense data in this function, | |
3923 | * considering both err_mask and tf. | |
3924 | */ | |
03faab78 | 3925 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3926 | ata_eh_qc_retry(qc); |
03faab78 TH |
3927 | else |
3928 | ata_eh_qc_complete(qc); | |
022bdb07 | 3929 | } else { |
18bd7718 NC |
3930 | if (qc->flags & ATA_QCFLAG_SENSE_VALID || |
3931 | qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD) { | |
022bdb07 TH |
3932 | ata_eh_qc_complete(qc); |
3933 | } else { | |
3934 | /* feed zero TF to sense generation */ | |
3935 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3936 | ata_eh_qc_retry(qc); | |
3937 | } | |
3938 | } | |
3939 | } | |
da917d69 TH |
3940 | |
3941 | /* make sure nr_active_links is zero after EH */ | |
3942 | WARN_ON(ap->nr_active_links); | |
3943 | ap->nr_active_links = 0; | |
022bdb07 TH |
3944 | } |
3945 | ||
3946 | /** | |
3947 | * ata_do_eh - do standard error handling | |
3948 | * @ap: host port to handle error for | |
a1efdaba | 3949 | * |
f5914a46 | 3950 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3951 | * @softreset: softreset method (can be NULL) |
3952 | * @hardreset: hardreset method (can be NULL) | |
3953 | * @postreset: postreset method (can be NULL) | |
3954 | * | |
3955 | * Perform standard error handling sequence. | |
3956 | * | |
3957 | * LOCKING: | |
3958 | * Kernel thread context (may sleep). | |
3959 | */ | |
f5914a46 TH |
3960 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3961 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3962 | ata_postreset_fn_t postreset) | |
022bdb07 | 3963 | { |
9b1e2658 TH |
3964 | struct ata_device *dev; |
3965 | int rc; | |
3966 | ||
3967 | ata_eh_autopsy(ap); | |
3968 | ata_eh_report(ap); | |
3969 | ||
3970 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3971 | NULL); | |
3972 | if (rc) { | |
1eca4365 | 3973 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
3974 | ata_dev_disable(dev); |
3975 | } | |
3976 | ||
022bdb07 TH |
3977 | ata_eh_finish(ap); |
3978 | } | |
500530f6 | 3979 | |
a1efdaba TH |
3980 | /** |
3981 | * ata_std_error_handler - standard error handler | |
3982 | * @ap: host port to handle error for | |
3983 | * | |
3984 | * Standard error handler | |
3985 | * | |
3986 | * LOCKING: | |
3987 | * Kernel thread context (may sleep). | |
3988 | */ | |
3989 | void ata_std_error_handler(struct ata_port *ap) | |
3990 | { | |
3991 | struct ata_port_operations *ops = ap->ops; | |
3992 | ata_reset_fn_t hardreset = ops->hardreset; | |
3993 | ||
57c9efdf | 3994 | /* ignore built-in hardreset if SCR access is not available */ |
fe06e5f9 | 3995 | if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) |
a1efdaba TH |
3996 | hardreset = NULL; |
3997 | ||
3998 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
3999 | } | |
a52fbcfc | 4000 | EXPORT_SYMBOL_GPL(ata_std_error_handler); |
a1efdaba | 4001 | |
6ffa01d8 | 4002 | #ifdef CONFIG_PM |
500530f6 TH |
4003 | /** |
4004 | * ata_eh_handle_port_suspend - perform port suspend operation | |
4005 | * @ap: port to suspend | |
4006 | * | |
4007 | * Suspend @ap. | |
4008 | * | |
4009 | * LOCKING: | |
4010 | * Kernel thread context (may sleep). | |
4011 | */ | |
4012 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
4013 | { | |
4014 | unsigned long flags; | |
4015 | int rc = 0; | |
3dc67440 | 4016 | struct ata_device *dev; |
500530f6 TH |
4017 | |
4018 | /* are we suspending? */ | |
4019 | spin_lock_irqsave(ap->lock, flags); | |
4020 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 4021 | ap->pm_mesg.event & PM_EVENT_RESUME) { |
500530f6 TH |
4022 | spin_unlock_irqrestore(ap->lock, flags); |
4023 | return; | |
4024 | } | |
4025 | spin_unlock_irqrestore(ap->lock, flags); | |
4026 | ||
4027 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
4028 | ||
3dc67440 AL |
4029 | /* |
4030 | * If we have a ZPODD attached, check its zero | |
4031 | * power ready status before the port is frozen. | |
a7ff60db | 4032 | * Only needed for runtime suspend. |
3dc67440 | 4033 | */ |
a7ff60db AL |
4034 | if (PMSG_IS_AUTO(ap->pm_mesg)) { |
4035 | ata_for_each_dev(dev, &ap->link, ENABLED) { | |
4036 | if (zpodd_dev_enabled(dev)) | |
4037 | zpodd_on_suspend(dev); | |
4038 | } | |
3dc67440 AL |
4039 | } |
4040 | ||
500530f6 TH |
4041 | /* suspend */ |
4042 | ata_eh_freeze_port(ap); | |
4043 | ||
4044 | if (ap->ops->port_suspend) | |
4045 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
4046 | ||
a7ff60db | 4047 | ata_acpi_set_state(ap, ap->pm_mesg); |
2a7b02ea | 4048 | |
bc6e7c4b | 4049 | /* update the flags */ |
500530f6 TH |
4050 | spin_lock_irqsave(ap->lock, flags); |
4051 | ||
4052 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
4053 | if (rc == 0) | |
4054 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
4cb7c6f1 | 4055 | else if (ata_port_is_frozen(ap)) |
500530f6 TH |
4056 | ata_port_schedule_eh(ap); |
4057 | ||
500530f6 TH |
4058 | spin_unlock_irqrestore(ap->lock, flags); |
4059 | ||
4060 | return; | |
4061 | } | |
4062 | ||
4063 | /** | |
4064 | * ata_eh_handle_port_resume - perform port resume operation | |
4065 | * @ap: port to resume | |
4066 | * | |
4067 | * Resume @ap. | |
4068 | * | |
500530f6 TH |
4069 | * LOCKING: |
4070 | * Kernel thread context (may sleep). | |
4071 | */ | |
4072 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
4073 | { | |
6f9c1ea2 TH |
4074 | struct ata_link *link; |
4075 | struct ata_device *dev; | |
500530f6 | 4076 | unsigned long flags; |
500530f6 TH |
4077 | |
4078 | /* are we resuming? */ | |
4079 | spin_lock_irqsave(ap->lock, flags); | |
4080 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 4081 | !(ap->pm_mesg.event & PM_EVENT_RESUME)) { |
500530f6 TH |
4082 | spin_unlock_irqrestore(ap->lock, flags); |
4083 | return; | |
4084 | } | |
4085 | spin_unlock_irqrestore(ap->lock, flags); | |
4086 | ||
9666f400 | 4087 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 4088 | |
6f9c1ea2 TH |
4089 | /* |
4090 | * Error timestamps are in jiffies which doesn't run while | |
4091 | * suspended and PHY events during resume isn't too uncommon. | |
4092 | * When the two are combined, it can lead to unnecessary speed | |
4093 | * downs if the machine is suspended and resumed repeatedly. | |
4094 | * Clear error history. | |
4095 | */ | |
4096 | ata_for_each_link(link, ap, HOST_FIRST) | |
4097 | ata_for_each_dev(dev, link, ALL) | |
4098 | ata_ering_clear(&dev->ering); | |
4099 | ||
a7ff60db | 4100 | ata_acpi_set_state(ap, ap->pm_mesg); |
bd3adca5 | 4101 | |
500530f6 | 4102 | if (ap->ops->port_resume) |
ae867937 | 4103 | ap->ops->port_resume(ap); |
500530f6 | 4104 | |
6746544c TH |
4105 | /* tell ACPI that we're resuming */ |
4106 | ata_acpi_on_resume(ap); | |
4107 | ||
bc6e7c4b | 4108 | /* update the flags */ |
500530f6 TH |
4109 | spin_lock_irqsave(ap->lock, flags); |
4110 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
500530f6 TH |
4111 | spin_unlock_irqrestore(ap->lock, flags); |
4112 | } | |
6ffa01d8 | 4113 | #endif /* CONFIG_PM */ |