Commit | Line | Data |
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ece1d636 TH |
1 | /* |
2 | * libata-eh.c - libata error handling | |
3 | * | |
8c3d3d4b | 4 | * Maintained by: Tejun Heo <tj@kernel.org> |
ece1d636 TH |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2006 Tejun Heo <htejun@gmail.com> | |
9 | * | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License as | |
13 | * published by the Free Software Foundation; either version 2, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; see the file COPYING. If not, write to | |
23 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, | |
24 | * USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
9bb9a39c | 28 | * as Documentation/driver-api/libata.rst |
ece1d636 TH |
29 | * |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
33 | */ | |
34 | ||
ece1d636 | 35 | #include <linux/kernel.h> |
242f9dcb | 36 | #include <linux/blkdev.h> |
38789fda | 37 | #include <linux/export.h> |
2855568b | 38 | #include <linux/pci.h> |
ece1d636 TH |
39 | #include <scsi/scsi.h> |
40 | #include <scsi/scsi_host.h> | |
41 | #include <scsi/scsi_eh.h> | |
42 | #include <scsi/scsi_device.h> | |
43 | #include <scsi/scsi_cmnd.h> | |
6521148c | 44 | #include <scsi/scsi_dbg.h> |
c6fd2807 | 45 | #include "../scsi/scsi_transport_api.h" |
ece1d636 TH |
46 | |
47 | #include <linux/libata.h> | |
48 | ||
255c03d1 | 49 | #include <trace/events/libata.h> |
ece1d636 TH |
50 | #include "libata.h" |
51 | ||
7d47e8d4 | 52 | enum { |
3884f7b0 | 53 | /* speed down verdicts */ |
7d47e8d4 TH |
54 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
55 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
56 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 57 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
58 | |
59 | /* error flags */ | |
60 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 61 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
d9027470 | 62 | ATA_EFLAG_OLD_ER = (1 << 31), |
3884f7b0 TH |
63 | |
64 | /* error categories */ | |
65 | ATA_ECAT_NONE = 0, | |
66 | ATA_ECAT_ATA_BUS = 1, | |
67 | ATA_ECAT_TOUT_HSM = 2, | |
68 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
69 | ATA_ECAT_DUBIOUS_NONE = 4, |
70 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
71 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
72 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
73 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 74 | |
87fbc5a0 TH |
75 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
76 | ||
0a2c0f56 TH |
77 | /* always put at least this amount of time between resets */ |
78 | ATA_EH_RESET_COOL_DOWN = 5000, | |
79 | ||
341c2c95 TH |
80 | /* Waiting in ->prereset can never be reliable. It's |
81 | * sometimes nice to wait there but it can't be depended upon; | |
82 | * otherwise, we wouldn't be resetting. Just give it enough | |
83 | * time for most drives to spin up. | |
84 | */ | |
85 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
86 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
87 | |
88 | ATA_EH_UA_TRIES = 5, | |
c2c7a89c TH |
89 | |
90 | /* probe speed down parameters, see ata_eh_schedule_probe() */ | |
91 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ | |
92 | ATA_EH_PROBE_TRIALS = 2, | |
31daabda TH |
93 | }; |
94 | ||
95 | /* The following table determines how we sequence resets. Each entry | |
96 | * represents timeout for that try. The first try can be soft or | |
97 | * hardreset. All others are hardreset if available. In most cases | |
98 | * the first reset w/ 10sec timeout should succeed. Following entries | |
35bf8821 DW |
99 | * are mostly for error handling, hotplug and those outlier devices that |
100 | * take an exceptionally long time to recover from reset. | |
31daabda TH |
101 | */ |
102 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
103 | 10000, /* most drives spin up by 10sec */ |
104 | 10000, /* > 99% working drives spin up before 20sec */ | |
35bf8821 | 105 | 35000, /* give > 30 secs of idleness for outlier devices */ |
341c2c95 | 106 | 5000, /* and sweet one last chance */ |
d8af0eb6 | 107 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
108 | }; |
109 | ||
87fbc5a0 TH |
110 | static const unsigned long ata_eh_identify_timeouts[] = { |
111 | 5000, /* covers > 99% of successes and not too boring on failures */ | |
112 | 10000, /* combined time till here is enough even for media access */ | |
113 | 30000, /* for true idiots */ | |
114 | ULONG_MAX, | |
115 | }; | |
116 | ||
6013efd8 TH |
117 | static const unsigned long ata_eh_flush_timeouts[] = { |
118 | 15000, /* be generous with flush */ | |
119 | 15000, /* ditto */ | |
120 | 30000, /* and even more generous */ | |
121 | ULONG_MAX, | |
122 | }; | |
123 | ||
87fbc5a0 TH |
124 | static const unsigned long ata_eh_other_timeouts[] = { |
125 | 5000, /* same rationale as identify timeout */ | |
126 | 10000, /* ditto */ | |
127 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
128 | ULONG_MAX, | |
129 | }; | |
130 | ||
131 | struct ata_eh_cmd_timeout_ent { | |
132 | const u8 *commands; | |
133 | const unsigned long *timeouts; | |
134 | }; | |
135 | ||
136 | /* The following table determines timeouts to use for EH internal | |
137 | * commands. Each table entry is a command class and matches the | |
138 | * commands the entry applies to and the timeout table to use. | |
139 | * | |
140 | * On the retry after a command timed out, the next timeout value from | |
141 | * the table is used. If the table doesn't contain further entries, | |
142 | * the last value is used. | |
143 | * | |
144 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
145 | * command class, so if SET_FEATURES times out on the first try, the | |
146 | * next try will use the second timeout value only for that class. | |
147 | */ | |
148 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
149 | static const struct ata_eh_cmd_timeout_ent | |
150 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
151 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
152 | .timeouts = ata_eh_identify_timeouts, }, | |
153 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), | |
154 | .timeouts = ata_eh_other_timeouts, }, | |
155 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
156 | .timeouts = ata_eh_other_timeouts, }, | |
157 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
158 | .timeouts = ata_eh_other_timeouts, }, | |
159 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
160 | .timeouts = ata_eh_other_timeouts, }, | |
6013efd8 TH |
161 | { .commands = CMDS(ATA_CMD_FLUSH, ATA_CMD_FLUSH_EXT), |
162 | .timeouts = ata_eh_flush_timeouts }, | |
87fbc5a0 TH |
163 | }; |
164 | #undef CMDS | |
165 | ||
ad9e2762 | 166 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 167 | #ifdef CONFIG_PM |
500530f6 TH |
168 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
169 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
170 | #else /* CONFIG_PM */ |
171 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
172 | { } | |
173 | ||
174 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
175 | { } | |
6ffa01d8 | 176 | #endif /* CONFIG_PM */ |
ad9e2762 | 177 | |
0d74d872 MM |
178 | static __printf(2, 0) void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, |
179 | const char *fmt, va_list args) | |
b64bbc39 TH |
180 | { |
181 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
182 | ATA_EH_DESC_LEN - ehi->desc_len, | |
183 | fmt, args); | |
184 | } | |
185 | ||
186 | /** | |
187 | * __ata_ehi_push_desc - push error description without adding separator | |
188 | * @ehi: target EHI | |
189 | * @fmt: printf format string | |
190 | * | |
191 | * Format string according to @fmt and append it to @ehi->desc. | |
192 | * | |
193 | * LOCKING: | |
194 | * spin_lock_irqsave(host lock) | |
195 | */ | |
196 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
197 | { | |
198 | va_list args; | |
199 | ||
200 | va_start(args, fmt); | |
201 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
202 | va_end(args); | |
203 | } | |
204 | ||
205 | /** | |
206 | * ata_ehi_push_desc - push error description with separator | |
207 | * @ehi: target EHI | |
208 | * @fmt: printf format string | |
209 | * | |
210 | * Format string according to @fmt and append it to @ehi->desc. | |
211 | * If @ehi->desc is not empty, ", " is added in-between. | |
212 | * | |
213 | * LOCKING: | |
214 | * spin_lock_irqsave(host lock) | |
215 | */ | |
216 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
217 | { | |
218 | va_list args; | |
219 | ||
220 | if (ehi->desc_len) | |
221 | __ata_ehi_push_desc(ehi, ", "); | |
222 | ||
223 | va_start(args, fmt); | |
224 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
225 | va_end(args); | |
226 | } | |
227 | ||
228 | /** | |
229 | * ata_ehi_clear_desc - clean error description | |
230 | * @ehi: target EHI | |
231 | * | |
232 | * Clear @ehi->desc. | |
233 | * | |
234 | * LOCKING: | |
235 | * spin_lock_irqsave(host lock) | |
236 | */ | |
237 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
238 | { | |
239 | ehi->desc[0] = '\0'; | |
240 | ehi->desc_len = 0; | |
241 | } | |
242 | ||
cbcdd875 TH |
243 | /** |
244 | * ata_port_desc - append port description | |
245 | * @ap: target ATA port | |
246 | * @fmt: printf format string | |
247 | * | |
248 | * Format string according to @fmt and append it to port | |
249 | * description. If port description is not empty, " " is added | |
250 | * in-between. This function is to be used while initializing | |
251 | * ata_host. The description is printed on host registration. | |
252 | * | |
253 | * LOCKING: | |
254 | * None. | |
255 | */ | |
256 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
257 | { | |
258 | va_list args; | |
259 | ||
260 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
261 | ||
262 | if (ap->link.eh_info.desc_len) | |
263 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
264 | ||
265 | va_start(args, fmt); | |
266 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
267 | va_end(args); | |
268 | } | |
269 | ||
270 | #ifdef CONFIG_PCI | |
271 | ||
272 | /** | |
273 | * ata_port_pbar_desc - append PCI BAR description | |
274 | * @ap: target ATA port | |
275 | * @bar: target PCI BAR | |
276 | * @offset: offset into PCI BAR | |
277 | * @name: name of the area | |
278 | * | |
279 | * If @offset is negative, this function formats a string which | |
280 | * contains the name, address, size and type of the BAR and | |
281 | * appends it to the port description. If @offset is zero or | |
282 | * positive, only name and offsetted address is appended. | |
283 | * | |
284 | * LOCKING: | |
285 | * None. | |
286 | */ | |
287 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
288 | const char *name) | |
289 | { | |
290 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
291 | char *type = ""; | |
292 | unsigned long long start, len; | |
293 | ||
294 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
295 | type = "m"; | |
296 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
297 | type = "i"; | |
298 | ||
299 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
300 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
301 | ||
302 | if (offset < 0) | |
303 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
304 | else | |
e6a73ab1 AM |
305 | ata_port_desc(ap, "%s 0x%llx", name, |
306 | start + (unsigned long long)offset); | |
cbcdd875 TH |
307 | } |
308 | ||
309 | #endif /* CONFIG_PCI */ | |
310 | ||
87fbc5a0 TH |
311 | static int ata_lookup_timeout_table(u8 cmd) |
312 | { | |
313 | int i; | |
314 | ||
315 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
316 | const u8 *cur; | |
317 | ||
318 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
319 | if (*cur == cmd) | |
320 | return i; | |
321 | } | |
322 | ||
323 | return -1; | |
324 | } | |
325 | ||
326 | /** | |
327 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
328 | * @dev: target device | |
329 | * @cmd: internal command to be issued | |
330 | * | |
331 | * Determine timeout for internal command @cmd for @dev. | |
332 | * | |
333 | * LOCKING: | |
334 | * EH context. | |
335 | * | |
336 | * RETURNS: | |
337 | * Determined timeout. | |
338 | */ | |
339 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) | |
340 | { | |
341 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
342 | int ent = ata_lookup_timeout_table(cmd); | |
343 | int idx; | |
344 | ||
345 | if (ent < 0) | |
346 | return ATA_EH_CMD_DFL_TIMEOUT; | |
347 | ||
348 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
349 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
350 | } | |
351 | ||
352 | /** | |
353 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
354 | * @dev: target device | |
355 | * @cmd: internal command which timed out | |
356 | * | |
357 | * Notify EH that internal command @cmd for @dev timed out. This | |
358 | * function should be called only for commands whose timeouts are | |
359 | * determined using ata_internal_cmd_timeout(). | |
360 | * | |
361 | * LOCKING: | |
362 | * EH context. | |
363 | */ | |
364 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
365 | { | |
366 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
367 | int ent = ata_lookup_timeout_table(cmd); | |
368 | int idx; | |
369 | ||
370 | if (ent < 0) | |
371 | return; | |
372 | ||
373 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
374 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) | |
375 | ehc->cmd_timeout_idx[dev->devno][ent]++; | |
376 | } | |
377 | ||
3884f7b0 | 378 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
379 | unsigned int err_mask) |
380 | { | |
381 | struct ata_ering_entry *ent; | |
382 | ||
383 | WARN_ON(!err_mask); | |
384 | ||
385 | ering->cursor++; | |
386 | ering->cursor %= ATA_ERING_SIZE; | |
387 | ||
388 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 389 | ent->eflags = eflags; |
0c247c55 TH |
390 | ent->err_mask = err_mask; |
391 | ent->timestamp = get_jiffies_64(); | |
392 | } | |
393 | ||
76326ac1 TH |
394 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
395 | { | |
396 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
397 | ||
398 | if (ent->err_mask) | |
399 | return ent; | |
400 | return NULL; | |
401 | } | |
402 | ||
d9027470 GG |
403 | int ata_ering_map(struct ata_ering *ering, |
404 | int (*map_fn)(struct ata_ering_entry *, void *), | |
405 | void *arg) | |
0c247c55 TH |
406 | { |
407 | int idx, rc = 0; | |
408 | struct ata_ering_entry *ent; | |
409 | ||
410 | idx = ering->cursor; | |
411 | do { | |
412 | ent = &ering->ring[idx]; | |
413 | if (!ent->err_mask) | |
414 | break; | |
415 | rc = map_fn(ent, arg); | |
416 | if (rc) | |
417 | break; | |
418 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
419 | } while (idx != ering->cursor); | |
420 | ||
421 | return rc; | |
422 | } | |
423 | ||
60428407 | 424 | static int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg) |
d9027470 GG |
425 | { |
426 | ent->eflags |= ATA_EFLAG_OLD_ER; | |
427 | return 0; | |
428 | } | |
429 | ||
430 | static void ata_ering_clear(struct ata_ering *ering) | |
431 | { | |
432 | ata_ering_map(ering, ata_ering_clear_cb, NULL); | |
433 | } | |
434 | ||
64f65ca6 TH |
435 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
436 | { | |
9af5c9c9 | 437 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
438 | |
439 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
440 | } | |
441 | ||
f58229f8 | 442 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
443 | struct ata_eh_info *ehi, unsigned int action) |
444 | { | |
f58229f8 | 445 | struct ata_device *tdev; |
af181c2d TH |
446 | |
447 | if (!dev) { | |
448 | ehi->action &= ~action; | |
1eca4365 | 449 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 450 | ehi->dev_action[tdev->devno] &= ~action; |
af181c2d TH |
451 | } else { |
452 | /* doesn't make sense for port-wide EH actions */ | |
453 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
454 | ||
455 | /* break ehi->action into ehi->dev_action */ | |
456 | if (ehi->action & action) { | |
1eca4365 | 457 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
458 | ehi->dev_action[tdev->devno] |= |
459 | ehi->action & action; | |
af181c2d TH |
460 | ehi->action &= ~action; |
461 | } | |
462 | ||
463 | /* turn off the specified per-dev action */ | |
464 | ehi->dev_action[dev->devno] &= ~action; | |
465 | } | |
466 | } | |
467 | ||
c0c362b6 TH |
468 | /** |
469 | * ata_eh_acquire - acquire EH ownership | |
470 | * @ap: ATA port to acquire EH ownership for | |
471 | * | |
472 | * Acquire EH ownership for @ap. This is the basic exclusion | |
473 | * mechanism for ports sharing a host. Only one port hanging off | |
474 | * the same host can claim the ownership of EH. | |
475 | * | |
476 | * LOCKING: | |
477 | * EH context. | |
478 | */ | |
479 | void ata_eh_acquire(struct ata_port *ap) | |
480 | { | |
481 | mutex_lock(&ap->host->eh_mutex); | |
482 | WARN_ON_ONCE(ap->host->eh_owner); | |
483 | ap->host->eh_owner = current; | |
484 | } | |
485 | ||
486 | /** | |
487 | * ata_eh_release - release EH ownership | |
488 | * @ap: ATA port to release EH ownership for | |
489 | * | |
490 | * Release EH ownership for @ap if the caller. The caller must | |
491 | * have acquired EH ownership using ata_eh_acquire() previously. | |
492 | * | |
493 | * LOCKING: | |
494 | * EH context. | |
495 | */ | |
496 | void ata_eh_release(struct ata_port *ap) | |
497 | { | |
498 | WARN_ON_ONCE(ap->host->eh_owner != current); | |
499 | ap->host->eh_owner = NULL; | |
500 | mutex_unlock(&ap->host->eh_mutex); | |
501 | } | |
502 | ||
ece180d1 TH |
503 | static void ata_eh_unload(struct ata_port *ap) |
504 | { | |
505 | struct ata_link *link; | |
506 | struct ata_device *dev; | |
507 | unsigned long flags; | |
508 | ||
509 | /* Restore SControl IPM and SPD for the next driver and | |
510 | * disable attached devices. | |
511 | */ | |
512 | ata_for_each_link(link, ap, PMP_FIRST) { | |
513 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
514 | ata_for_each_dev(dev, link, ALL) | |
515 | ata_dev_disable(dev); | |
516 | } | |
517 | ||
518 | /* freeze and set UNLOADED */ | |
519 | spin_lock_irqsave(ap->lock, flags); | |
520 | ||
521 | ata_port_freeze(ap); /* won't be thawed */ | |
522 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
523 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
524 | ||
525 | spin_unlock_irqrestore(ap->lock, flags); | |
526 | } | |
527 | ||
ece1d636 TH |
528 | /** |
529 | * ata_scsi_error - SCSI layer error handler callback | |
530 | * @host: SCSI host on which error occurred | |
531 | * | |
532 | * Handles SCSI-layer-thrown error events. | |
533 | * | |
534 | * LOCKING: | |
535 | * Inherited from SCSI layer (none, can sleep) | |
536 | * | |
537 | * RETURNS: | |
538 | * Zero. | |
539 | */ | |
381544bb | 540 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 541 | { |
35bb94b1 | 542 | struct ata_port *ap = ata_shost_to_port(host); |
ad9e2762 | 543 | unsigned long flags; |
c34aeebc | 544 | LIST_HEAD(eh_work_q); |
ece1d636 TH |
545 | |
546 | DPRINTK("ENTER\n"); | |
547 | ||
c34aeebc JB |
548 | spin_lock_irqsave(host->host_lock, flags); |
549 | list_splice_init(&host->eh_cmd_q, &eh_work_q); | |
550 | spin_unlock_irqrestore(host->host_lock, flags); | |
551 | ||
0e0b494c JB |
552 | ata_scsi_cmd_error_handler(host, ap, &eh_work_q); |
553 | ||
554 | /* If we timed raced normal completion and there is nothing to | |
555 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ | |
556 | ata_scsi_port_error_handler(host, ap); | |
557 | ||
558 | /* finish or retry handled scmd's and clean up */ | |
72d8c36e | 559 | WARN_ON(!list_empty(&eh_work_q)); |
0e0b494c JB |
560 | |
561 | DPRINTK("EXIT\n"); | |
562 | } | |
563 | ||
564 | /** | |
565 | * ata_scsi_cmd_error_handler - error callback for a list of commands | |
566 | * @host: scsi host containing the port | |
567 | * @ap: ATA port within the host | |
568 | * @eh_work_q: list of commands to process | |
569 | * | |
570 | * process the given list of commands and return those finished to the | |
571 | * ap->eh_done_q. This function is the first part of the libata error | |
572 | * handler which processes a given list of failed commands. | |
573 | */ | |
574 | void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, | |
575 | struct list_head *eh_work_q) | |
576 | { | |
577 | int i; | |
578 | unsigned long flags; | |
579 | ||
c429137a TH |
580 | /* make sure sff pio task is not running */ |
581 | ata_sff_flush_pio_task(ap); | |
ece1d636 | 582 | |
cca3974e | 583 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
584 | |
585 | /* For new EH, all qcs are finished in one of three ways - | |
586 | * normal completion, error completion, and SCSI timeout. | |
c96f1732 | 587 | * Both completions can race against SCSI timeout. When normal |
ad9e2762 TH |
588 | * completion wins, the qc never reaches EH. When error |
589 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
590 | * | |
591 | * When SCSI timeout wins, things are a bit more complex. | |
592 | * Normal or error completion can occur after the timeout but | |
593 | * before this point. In such cases, both types of | |
594 | * completions are honored. A scmd is determined to have | |
595 | * timed out iff its associated qc is active and not failed. | |
596 | */ | |
a4f08141 | 597 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 TH |
598 | if (ap->ops->error_handler) { |
599 | struct scsi_cmnd *scmd, *tmp; | |
600 | int nr_timedout = 0; | |
601 | ||
c96f1732 AC |
602 | /* This must occur under the ap->lock as we don't want |
603 | a polled recovery to race the real interrupt handler | |
d9027470 | 604 | |
c96f1732 AC |
605 | The lost_interrupt handler checks for any completed but |
606 | non-notified command and completes much like an IRQ handler. | |
d9027470 | 607 | |
c96f1732 AC |
608 | We then fall into the error recovery code which will treat |
609 | this as if normal completion won the race */ | |
610 | ||
611 | if (ap->ops->lost_interrupt) | |
612 | ap->ops->lost_interrupt(ap); | |
d9027470 | 613 | |
0e0b494c | 614 | list_for_each_entry_safe(scmd, tmp, eh_work_q, eh_entry) { |
ad9e2762 TH |
615 | struct ata_queued_cmd *qc; |
616 | ||
258c4e5c | 617 | ata_qc_for_each_raw(ap, qc, i) { |
ad9e2762 TH |
618 | if (qc->flags & ATA_QCFLAG_ACTIVE && |
619 | qc->scsicmd == scmd) | |
620 | break; | |
621 | } | |
622 | ||
623 | if (i < ATA_MAX_QUEUE) { | |
624 | /* the scmd has an associated qc */ | |
625 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
626 | /* which hasn't failed yet, timeout */ | |
627 | qc->err_mask |= AC_ERR_TIMEOUT; | |
628 | qc->flags |= ATA_QCFLAG_FAILED; | |
629 | nr_timedout++; | |
630 | } | |
631 | } else { | |
632 | /* Normal completion occurred after | |
633 | * SCSI timeout but before this point. | |
634 | * Successfully complete it. | |
635 | */ | |
636 | scmd->retries = scmd->allowed; | |
637 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
638 | } | |
639 | } | |
640 | ||
641 | /* If we have timed out qcs. They belong to EH from | |
642 | * this point but the state of the controller is | |
643 | * unknown. Freeze the port to make sure the IRQ | |
644 | * handler doesn't diddle with those qcs. This must | |
645 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
646 | */ | |
647 | if (nr_timedout) | |
648 | __ata_port_freeze(ap); | |
649 | ||
a1e10f7e TH |
650 | |
651 | /* initialize eh_tries */ | |
652 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
a4f08141 PM |
653 | } |
654 | spin_unlock_irqrestore(ap->lock, flags); | |
d9027470 | 655 | |
0e0b494c JB |
656 | } |
657 | EXPORT_SYMBOL(ata_scsi_cmd_error_handler); | |
658 | ||
659 | /** | |
660 | * ata_scsi_port_error_handler - recover the port after the commands | |
661 | * @host: SCSI host containing the port | |
662 | * @ap: the ATA port | |
663 | * | |
664 | * Handle the recovery of the port @ap after all the commands | |
665 | * have been recovered. | |
666 | */ | |
667 | void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap) | |
668 | { | |
669 | unsigned long flags; | |
ad9e2762 | 670 | |
ad9e2762 TH |
671 | /* invoke error handler */ |
672 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
673 | struct ata_link *link; |
674 | ||
c0c362b6 TH |
675 | /* acquire EH ownership */ |
676 | ata_eh_acquire(ap); | |
677 | repeat: | |
5ddf24c5 TH |
678 | /* kill fast drain timer */ |
679 | del_timer_sync(&ap->fastdrain_timer); | |
680 | ||
500530f6 TH |
681 | /* process port resume request */ |
682 | ata_eh_handle_port_resume(ap); | |
683 | ||
f3e81b19 | 684 | /* fetch & clear EH info */ |
e30349d2 | 685 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 686 | |
1eca4365 | 687 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
688 | struct ata_eh_context *ehc = &link->eh_context; |
689 | struct ata_device *dev; | |
690 | ||
cf1b86c8 TH |
691 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
692 | link->eh_context.i = link->eh_info; | |
693 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 694 | |
1eca4365 | 695 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
696 | int devno = dev->devno; |
697 | ||
698 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
699 | if (ata_ncq_enabled(dev)) | |
700 | ehc->saved_ncq_enabled |= 1 << devno; | |
701 | } | |
cf1b86c8 | 702 | } |
f3e81b19 | 703 | |
b51e9e5d TH |
704 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
705 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 706 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 707 | |
e30349d2 | 708 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 709 | |
500530f6 TH |
710 | /* invoke EH, skip if unloading or suspended */ |
711 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 712 | ap->ops->error_handler(ap); |
ece180d1 TH |
713 | else { |
714 | /* if unloading, commence suicide */ | |
715 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
716 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
717 | ata_eh_unload(ap); | |
720ba126 | 718 | ata_eh_finish(ap); |
ece180d1 | 719 | } |
ad9e2762 | 720 | |
500530f6 TH |
721 | /* process port suspend request */ |
722 | ata_eh_handle_port_suspend(ap); | |
723 | ||
25985edc | 724 | /* Exception might have happened after ->error_handler |
ad9e2762 TH |
725 | * recovered the port but before this point. Repeat |
726 | * EH in such case. | |
727 | */ | |
e30349d2 | 728 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 729 | |
b51e9e5d | 730 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 731 | if (--ap->eh_tries) { |
e30349d2 | 732 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
733 | goto repeat; |
734 | } | |
a9a79dfe JP |
735 | ata_port_err(ap, |
736 | "EH pending after %d tries, giving up\n", | |
737 | ATA_EH_MAX_TRIES); | |
914616a3 | 738 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
739 | } |
740 | ||
f3e81b19 | 741 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 742 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 743 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 744 | |
e4a9c373 DW |
745 | /* end eh (clear host_eh_scheduled) while holding |
746 | * ap->lock such that if exception occurs after this | |
747 | * point but before EH completion, SCSI midlayer will | |
ad9e2762 TH |
748 | * re-initiate EH. |
749 | */ | |
e4a9c373 | 750 | ap->ops->end_eh(ap); |
ad9e2762 | 751 | |
e30349d2 | 752 | spin_unlock_irqrestore(ap->lock, flags); |
c0c362b6 | 753 | ata_eh_release(ap); |
ad9e2762 | 754 | } else { |
9af5c9c9 | 755 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
756 | ap->ops->eng_timeout(ap); |
757 | } | |
ece1d636 | 758 | |
ece1d636 TH |
759 | scsi_eh_flush_done_q(&ap->eh_done_q); |
760 | ||
ad9e2762 | 761 | /* clean up */ |
e30349d2 | 762 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 763 | |
1cdaf534 | 764 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 765 | ap->pflags &= ~ATA_PFLAG_LOADING; |
6f54120e JY |
766 | else if ((ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) && |
767 | !(ap->flags & ATA_FLAG_SAS_HOST)) | |
ad72cf98 | 768 | schedule_delayed_work(&ap->hotplug_task, 0); |
1cdaf534 TH |
769 | |
770 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
a9a79dfe | 771 | ata_port_info(ap, "EH complete\n"); |
580b2102 | 772 | |
b51e9e5d | 773 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 774 | |
c6cf9e99 | 775 | /* tell wait_eh that we're done */ |
b51e9e5d | 776 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
777 | wake_up_all(&ap->eh_wait_q); |
778 | ||
e30349d2 | 779 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 780 | } |
0e0b494c | 781 | EXPORT_SYMBOL_GPL(ata_scsi_port_error_handler); |
ece1d636 | 782 | |
c6cf9e99 TH |
783 | /** |
784 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
785 | * @ap: Port to wait EH for | |
786 | * | |
787 | * Wait until the currently pending EH is complete. | |
788 | * | |
789 | * LOCKING: | |
790 | * Kernel thread context (may sleep). | |
791 | */ | |
792 | void ata_port_wait_eh(struct ata_port *ap) | |
793 | { | |
794 | unsigned long flags; | |
795 | DEFINE_WAIT(wait); | |
796 | ||
797 | retry: | |
ba6a1308 | 798 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 799 | |
b51e9e5d | 800 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 801 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 802 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 803 | schedule(); |
ba6a1308 | 804 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 805 | } |
0a1b622e | 806 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 807 | |
ba6a1308 | 808 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
809 | |
810 | /* make sure SCSI EH is complete */ | |
cca3974e | 811 | if (scsi_host_in_recovery(ap->scsi_host)) { |
97750ceb | 812 | ata_msleep(ap, 10); |
c6cf9e99 TH |
813 | goto retry; |
814 | } | |
815 | } | |
81c757bc | 816 | EXPORT_SYMBOL_GPL(ata_port_wait_eh); |
c6cf9e99 | 817 | |
5ddf24c5 TH |
818 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
819 | { | |
258c4e5c | 820 | struct ata_queued_cmd *qc; |
5ddf24c5 TH |
821 | unsigned int tag; |
822 | int nr = 0; | |
823 | ||
824 | /* count only non-internal commands */ | |
258c4e5c JA |
825 | ata_qc_for_each(ap, qc, tag) { |
826 | if (qc) | |
5ddf24c5 | 827 | nr++; |
9d207acc | 828 | } |
5ddf24c5 TH |
829 | |
830 | return nr; | |
831 | } | |
832 | ||
b93ab338 | 833 | void ata_eh_fastdrain_timerfn(struct timer_list *t) |
5ddf24c5 | 834 | { |
b93ab338 | 835 | struct ata_port *ap = from_timer(ap, t, fastdrain_timer); |
5ddf24c5 TH |
836 | unsigned long flags; |
837 | int cnt; | |
838 | ||
839 | spin_lock_irqsave(ap->lock, flags); | |
840 | ||
841 | cnt = ata_eh_nr_in_flight(ap); | |
842 | ||
843 | /* are we done? */ | |
844 | if (!cnt) | |
845 | goto out_unlock; | |
846 | ||
847 | if (cnt == ap->fastdrain_cnt) { | |
258c4e5c | 848 | struct ata_queued_cmd *qc; |
5ddf24c5 TH |
849 | unsigned int tag; |
850 | ||
851 | /* No progress during the last interval, tag all | |
852 | * in-flight qcs as timed out and freeze the port. | |
853 | */ | |
258c4e5c | 854 | ata_qc_for_each(ap, qc, tag) { |
5ddf24c5 TH |
855 | if (qc) |
856 | qc->err_mask |= AC_ERR_TIMEOUT; | |
857 | } | |
858 | ||
859 | ata_port_freeze(ap); | |
860 | } else { | |
861 | /* some qcs have finished, give it another chance */ | |
862 | ap->fastdrain_cnt = cnt; | |
863 | ap->fastdrain_timer.expires = | |
341c2c95 | 864 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
865 | add_timer(&ap->fastdrain_timer); |
866 | } | |
867 | ||
868 | out_unlock: | |
869 | spin_unlock_irqrestore(ap->lock, flags); | |
870 | } | |
871 | ||
872 | /** | |
873 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
874 | * @ap: target ATA port | |
875 | * @fastdrain: activate fast drain | |
876 | * | |
877 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
878 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
879 | * that EH kicks in in timely manner. | |
880 | * | |
881 | * LOCKING: | |
882 | * spin_lock_irqsave(host lock) | |
883 | */ | |
884 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
885 | { | |
886 | int cnt; | |
887 | ||
888 | /* already scheduled? */ | |
889 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
890 | return; | |
891 | ||
892 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
893 | ||
894 | if (!fastdrain) | |
895 | return; | |
896 | ||
897 | /* do we have in-flight qcs? */ | |
898 | cnt = ata_eh_nr_in_flight(ap); | |
899 | if (!cnt) | |
900 | return; | |
901 | ||
902 | /* activate fast drain */ | |
903 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
904 | ap->fastdrain_timer.expires = |
905 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
906 | add_timer(&ap->fastdrain_timer); |
907 | } | |
908 | ||
f686bcb8 TH |
909 | /** |
910 | * ata_qc_schedule_eh - schedule qc for error handling | |
911 | * @qc: command to schedule error handling for | |
912 | * | |
913 | * Schedule error handling for @qc. EH will kick in as soon as | |
914 | * other commands are drained. | |
915 | * | |
916 | * LOCKING: | |
cca3974e | 917 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
918 | */ |
919 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
920 | { | |
921 | struct ata_port *ap = qc->ap; | |
922 | ||
923 | WARN_ON(!ap->ops->error_handler); | |
924 | ||
925 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 926 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
927 | |
928 | /* The following will fail if timeout has already expired. | |
929 | * ata_scsi_error() takes care of such scmds on EH entry. | |
930 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
931 | * this function completes. | |
932 | */ | |
242f9dcb | 933 | blk_abort_request(qc->scsicmd->request); |
f686bcb8 TH |
934 | } |
935 | ||
7b70fc03 | 936 | /** |
e4a9c373 DW |
937 | * ata_std_sched_eh - non-libsas ata_ports issue eh with this common routine |
938 | * @ap: ATA port to schedule EH for | |
7b70fc03 | 939 | * |
e4a9c373 | 940 | * LOCKING: inherited from ata_port_schedule_eh |
cca3974e | 941 | * spin_lock_irqsave(host lock) |
7b70fc03 | 942 | */ |
e4a9c373 | 943 | void ata_std_sched_eh(struct ata_port *ap) |
7b70fc03 TH |
944 | { |
945 | WARN_ON(!ap->ops->error_handler); | |
946 | ||
f4d6d004 TH |
947 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
948 | return; | |
949 | ||
5ddf24c5 | 950 | ata_eh_set_pending(ap, 1); |
cca3974e | 951 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
952 | |
953 | DPRINTK("port EH scheduled\n"); | |
954 | } | |
e4a9c373 DW |
955 | EXPORT_SYMBOL_GPL(ata_std_sched_eh); |
956 | ||
957 | /** | |
958 | * ata_std_end_eh - non-libsas ata_ports complete eh with this common routine | |
959 | * @ap: ATA port to end EH for | |
960 | * | |
961 | * In the libata object model there is a 1:1 mapping of ata_port to | |
962 | * shost, so host fields can be directly manipulated under ap->lock, in | |
963 | * the libsas case we need to hold a lock at the ha->level to coordinate | |
964 | * these events. | |
965 | * | |
966 | * LOCKING: | |
967 | * spin_lock_irqsave(host lock) | |
968 | */ | |
969 | void ata_std_end_eh(struct ata_port *ap) | |
970 | { | |
971 | struct Scsi_Host *host = ap->scsi_host; | |
972 | ||
973 | host->host_eh_scheduled = 0; | |
974 | } | |
975 | EXPORT_SYMBOL(ata_std_end_eh); | |
976 | ||
977 | ||
978 | /** | |
979 | * ata_port_schedule_eh - schedule error handling without a qc | |
980 | * @ap: ATA port to schedule EH for | |
981 | * | |
982 | * Schedule error handling for @ap. EH will kick in as soon as | |
983 | * all commands are drained. | |
984 | * | |
985 | * LOCKING: | |
986 | * spin_lock_irqsave(host lock) | |
987 | */ | |
988 | void ata_port_schedule_eh(struct ata_port *ap) | |
989 | { | |
990 | /* see: ata_std_sched_eh, unless you know better */ | |
991 | ap->ops->sched_eh(ap); | |
992 | } | |
7b70fc03 | 993 | |
dbd82616 | 994 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 | 995 | { |
258c4e5c | 996 | struct ata_queued_cmd *qc; |
7b70fc03 TH |
997 | int tag, nr_aborted = 0; |
998 | ||
999 | WARN_ON(!ap->ops->error_handler); | |
1000 | ||
5ddf24c5 TH |
1001 | /* we're gonna abort all commands, no need for fast drain */ |
1002 | ata_eh_set_pending(ap, 0); | |
1003 | ||
28361c40 | 1004 | /* include internal tag in iteration */ |
258c4e5c | 1005 | ata_qc_for_each_with_internal(ap, qc, tag) { |
dbd82616 | 1006 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
1007 | qc->flags |= ATA_QCFLAG_FAILED; |
1008 | ata_qc_complete(qc); | |
1009 | nr_aborted++; | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | if (!nr_aborted) | |
1014 | ata_port_schedule_eh(ap); | |
1015 | ||
1016 | return nr_aborted; | |
1017 | } | |
1018 | ||
dbd82616 TH |
1019 | /** |
1020 | * ata_link_abort - abort all qc's on the link | |
1021 | * @link: ATA link to abort qc's for | |
1022 | * | |
1023 | * Abort all active qc's active on @link and schedule EH. | |
1024 | * | |
1025 | * LOCKING: | |
1026 | * spin_lock_irqsave(host lock) | |
1027 | * | |
1028 | * RETURNS: | |
1029 | * Number of aborted qc's. | |
1030 | */ | |
1031 | int ata_link_abort(struct ata_link *link) | |
1032 | { | |
1033 | return ata_do_link_abort(link->ap, link); | |
1034 | } | |
1035 | ||
1036 | /** | |
1037 | * ata_port_abort - abort all qc's on the port | |
1038 | * @ap: ATA port to abort qc's for | |
1039 | * | |
1040 | * Abort all active qc's of @ap and schedule EH. | |
1041 | * | |
1042 | * LOCKING: | |
1043 | * spin_lock_irqsave(host_set lock) | |
1044 | * | |
1045 | * RETURNS: | |
1046 | * Number of aborted qc's. | |
1047 | */ | |
1048 | int ata_port_abort(struct ata_port *ap) | |
1049 | { | |
1050 | return ata_do_link_abort(ap, NULL); | |
1051 | } | |
1052 | ||
e3180499 TH |
1053 | /** |
1054 | * __ata_port_freeze - freeze port | |
1055 | * @ap: ATA port to freeze | |
1056 | * | |
1057 | * This function is called when HSM violation or some other | |
1058 | * condition disrupts normal operation of the port. Frozen port | |
1059 | * is not allowed to perform any operation until the port is | |
1060 | * thawed, which usually follows a successful reset. | |
1061 | * | |
1062 | * ap->ops->freeze() callback can be used for freezing the port | |
1063 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
1064 | * port cannot be frozen hardware-wise, the interrupt handler | |
1065 | * must ack and clear interrupts unconditionally while the port | |
1066 | * is frozen. | |
1067 | * | |
1068 | * LOCKING: | |
cca3974e | 1069 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1070 | */ |
1071 | static void __ata_port_freeze(struct ata_port *ap) | |
1072 | { | |
1073 | WARN_ON(!ap->ops->error_handler); | |
1074 | ||
1075 | if (ap->ops->freeze) | |
1076 | ap->ops->freeze(ap); | |
1077 | ||
b51e9e5d | 1078 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 1079 | |
44877b4e | 1080 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
1081 | } |
1082 | ||
1083 | /** | |
1084 | * ata_port_freeze - abort & freeze port | |
1085 | * @ap: ATA port to freeze | |
1086 | * | |
54c38444 JG |
1087 | * Abort and freeze @ap. The freeze operation must be called |
1088 | * first, because some hardware requires special operations | |
1089 | * before the taskfile registers are accessible. | |
e3180499 TH |
1090 | * |
1091 | * LOCKING: | |
cca3974e | 1092 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1093 | * |
1094 | * RETURNS: | |
1095 | * Number of aborted commands. | |
1096 | */ | |
1097 | int ata_port_freeze(struct ata_port *ap) | |
1098 | { | |
1099 | int nr_aborted; | |
1100 | ||
1101 | WARN_ON(!ap->ops->error_handler); | |
1102 | ||
e3180499 | 1103 | __ata_port_freeze(ap); |
54c38444 | 1104 | nr_aborted = ata_port_abort(ap); |
e3180499 TH |
1105 | |
1106 | return nr_aborted; | |
1107 | } | |
1108 | ||
7d77b247 TH |
1109 | /** |
1110 | * sata_async_notification - SATA async notification handler | |
1111 | * @ap: ATA port where async notification is received | |
1112 | * | |
1113 | * Handler to be called when async notification via SDB FIS is | |
1114 | * received. This function schedules EH if necessary. | |
1115 | * | |
1116 | * LOCKING: | |
1117 | * spin_lock_irqsave(host lock) | |
1118 | * | |
1119 | * RETURNS: | |
1120 | * 1 if EH is scheduled, 0 otherwise. | |
1121 | */ | |
1122 | int sata_async_notification(struct ata_port *ap) | |
1123 | { | |
1124 | u32 sntf; | |
1125 | int rc; | |
1126 | ||
1127 | if (!(ap->flags & ATA_FLAG_AN)) | |
1128 | return 0; | |
1129 | ||
1130 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
1131 | if (rc == 0) | |
1132 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1133 | ||
071f44b1 | 1134 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1135 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1136 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1137 | /* PMP is not attached. Check whether ATAPI |
1138 | * AN is configured. If so, notify media | |
1139 | * change. | |
1140 | */ | |
1141 | struct ata_device *dev = ap->link.device; | |
1142 | ||
1143 | if ((dev->class == ATA_DEV_ATAPI) && | |
1144 | (dev->flags & ATA_DFLAG_AN)) | |
1145 | ata_scsi_media_change_notify(dev); | |
1146 | return 0; | |
1147 | } else { | |
1148 | /* PMP is attached but SNTF is not available. | |
1149 | * ATAPI async media change notification is | |
1150 | * not used. The PMP must be reporting PHY | |
1151 | * status change, schedule EH. | |
1152 | */ | |
1153 | ata_port_schedule_eh(ap); | |
1154 | return 1; | |
1155 | } | |
1156 | } else { | |
1157 | /* PMP is attached and SNTF is available */ | |
1158 | struct ata_link *link; | |
1159 | ||
1160 | /* check and notify ATAPI AN */ | |
1eca4365 | 1161 | ata_for_each_link(link, ap, EDGE) { |
7d77b247 TH |
1162 | if (!(sntf & (1 << link->pmp))) |
1163 | continue; | |
1164 | ||
1165 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1166 | (link->device->flags & ATA_DFLAG_AN)) | |
1167 | ata_scsi_media_change_notify(link->device); | |
1168 | } | |
1169 | ||
1170 | /* If PMP is reporting that PHY status of some | |
1171 | * downstream ports has changed, schedule EH. | |
1172 | */ | |
1173 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1174 | ata_port_schedule_eh(ap); | |
1175 | return 1; | |
1176 | } | |
1177 | ||
1178 | return 0; | |
1179 | } | |
1180 | } | |
1181 | ||
e3180499 TH |
1182 | /** |
1183 | * ata_eh_freeze_port - EH helper to freeze port | |
1184 | * @ap: ATA port to freeze | |
1185 | * | |
1186 | * Freeze @ap. | |
1187 | * | |
1188 | * LOCKING: | |
1189 | * None. | |
1190 | */ | |
1191 | void ata_eh_freeze_port(struct ata_port *ap) | |
1192 | { | |
1193 | unsigned long flags; | |
1194 | ||
1195 | if (!ap->ops->error_handler) | |
1196 | return; | |
1197 | ||
ba6a1308 | 1198 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1199 | __ata_port_freeze(ap); |
ba6a1308 | 1200 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1201 | } |
1202 | ||
1203 | /** | |
1204 | * ata_port_thaw_port - EH helper to thaw port | |
1205 | * @ap: ATA port to thaw | |
1206 | * | |
1207 | * Thaw frozen port @ap. | |
1208 | * | |
1209 | * LOCKING: | |
1210 | * None. | |
1211 | */ | |
1212 | void ata_eh_thaw_port(struct ata_port *ap) | |
1213 | { | |
1214 | unsigned long flags; | |
1215 | ||
1216 | if (!ap->ops->error_handler) | |
1217 | return; | |
1218 | ||
ba6a1308 | 1219 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1220 | |
b51e9e5d | 1221 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1222 | |
1223 | if (ap->ops->thaw) | |
1224 | ap->ops->thaw(ap); | |
1225 | ||
ba6a1308 | 1226 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1227 | |
44877b4e | 1228 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1229 | } |
1230 | ||
ece1d636 TH |
1231 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1232 | { | |
1233 | /* nada */ | |
1234 | } | |
1235 | ||
1236 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1237 | { | |
1238 | struct ata_port *ap = qc->ap; | |
1239 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1240 | unsigned long flags; | |
1241 | ||
ba6a1308 | 1242 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1243 | qc->scsidone = ata_eh_scsidone; |
1244 | __ata_qc_complete(qc); | |
1245 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1246 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1247 | |
1248 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1249 | } | |
1250 | ||
1251 | /** | |
1252 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1253 | * @qc: Command to complete | |
1254 | * | |
1255 | * Indicate to the mid and upper layers that an ATA command has | |
1256 | * completed. To be used from EH. | |
1257 | */ | |
1258 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1259 | { | |
1260 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1261 | scmd->retries = scmd->allowed; | |
1262 | __ata_eh_qc_complete(qc); | |
1263 | } | |
1264 | ||
1265 | /** | |
1266 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1267 | * @qc: Command to retry | |
1268 | * | |
1269 | * Indicate to the mid and upper layers that an ATA command | |
1270 | * should be retried. To be used from EH. | |
1271 | * | |
1272 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
f13e2201 | 1273 | * scmd->allowed is incremented for commands which get retried |
ece1d636 TH |
1274 | * due to unrelated failures (qc->err_mask is zero). |
1275 | */ | |
1276 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1277 | { | |
1278 | struct scsi_cmnd *scmd = qc->scsicmd; | |
f13e2201 GG |
1279 | if (!qc->err_mask) |
1280 | scmd->allowed++; | |
ece1d636 TH |
1281 | __ata_eh_qc_complete(qc); |
1282 | } | |
022bdb07 | 1283 | |
678afac6 TH |
1284 | /** |
1285 | * ata_dev_disable - disable ATA device | |
1286 | * @dev: ATA device to disable | |
1287 | * | |
1288 | * Disable @dev. | |
1289 | * | |
1290 | * Locking: | |
1291 | * EH context. | |
1292 | */ | |
1293 | void ata_dev_disable(struct ata_device *dev) | |
1294 | { | |
1295 | if (!ata_dev_enabled(dev)) | |
1296 | return; | |
1297 | ||
1298 | if (ata_msg_drv(dev->link->ap)) | |
a9a79dfe | 1299 | ata_dev_warn(dev, "disabled\n"); |
678afac6 TH |
1300 | ata_acpi_on_disable(dev); |
1301 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1302 | dev->class++; | |
99cf610a TH |
1303 | |
1304 | /* From now till the next successful probe, ering is used to | |
1305 | * track probe failures. Clear accumulated device error info. | |
1306 | */ | |
1307 | ata_ering_clear(&dev->ering); | |
678afac6 TH |
1308 | } |
1309 | ||
0ea035a3 TH |
1310 | /** |
1311 | * ata_eh_detach_dev - detach ATA device | |
1312 | * @dev: ATA device to detach | |
1313 | * | |
1314 | * Detach @dev. | |
1315 | * | |
1316 | * LOCKING: | |
1317 | * None. | |
1318 | */ | |
fb7fd614 | 1319 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1320 | { |
f58229f8 TH |
1321 | struct ata_link *link = dev->link; |
1322 | struct ata_port *ap = link->ap; | |
90484ebf | 1323 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1324 | unsigned long flags; |
1325 | ||
1326 | ata_dev_disable(dev); | |
1327 | ||
ba6a1308 | 1328 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1329 | |
1330 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1331 | ||
1332 | if (ata_scsi_offline_dev(dev)) { | |
1333 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1334 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1335 | } |
1336 | ||
90484ebf | 1337 | /* clear per-dev EH info */ |
f58229f8 TH |
1338 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1339 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1340 | ehc->saved_xfer_mode[dev->devno] = 0; |
1341 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1342 | |
ba6a1308 | 1343 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1344 | } |
1345 | ||
022bdb07 TH |
1346 | /** |
1347 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1348 | * @link: target ATA link |
47005f25 | 1349 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1350 | * @action: action about to be performed |
1351 | * | |
1352 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1353 | * in @link->eh_info such that eh actions are not unnecessarily |
1354 | * repeated. | |
022bdb07 TH |
1355 | * |
1356 | * LOCKING: | |
1357 | * None. | |
1358 | */ | |
fb7fd614 TH |
1359 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1360 | unsigned int action) | |
022bdb07 | 1361 | { |
955e57df TH |
1362 | struct ata_port *ap = link->ap; |
1363 | struct ata_eh_info *ehi = &link->eh_info; | |
1364 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1365 | unsigned long flags; |
1366 | ||
ba6a1308 | 1367 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1368 | |
955e57df | 1369 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1370 | |
a568d1d2 TH |
1371 | /* About to take EH action, set RECOVERED. Ignore actions on |
1372 | * slave links as master will do them again. | |
1373 | */ | |
1374 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1375 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1376 | ||
ba6a1308 | 1377 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1378 | } |
1379 | ||
47005f25 TH |
1380 | /** |
1381 | * ata_eh_done - EH action complete | |
2f60e1ab | 1382 | * @link: ATA link for which EH actions are complete |
47005f25 TH |
1383 | * @dev: target ATA dev for per-dev action (can be NULL) |
1384 | * @action: action just completed | |
1385 | * | |
1386 | * Called right after performing EH actions to clear related bits | |
955e57df | 1387 | * in @link->eh_context. |
47005f25 TH |
1388 | * |
1389 | * LOCKING: | |
1390 | * None. | |
1391 | */ | |
fb7fd614 TH |
1392 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1393 | unsigned int action) | |
47005f25 | 1394 | { |
955e57df | 1395 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1396 | |
955e57df | 1397 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1398 | } |
1399 | ||
022bdb07 TH |
1400 | /** |
1401 | * ata_err_string - convert err_mask to descriptive string | |
1402 | * @err_mask: error mask to convert to string | |
1403 | * | |
1404 | * Convert @err_mask to descriptive string. Errors are | |
1405 | * prioritized according to severity and only the most severe | |
1406 | * error is reported. | |
1407 | * | |
1408 | * LOCKING: | |
1409 | * None. | |
1410 | * | |
1411 | * RETURNS: | |
1412 | * Descriptive string for @err_mask | |
1413 | */ | |
2dcb407e | 1414 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1415 | { |
1416 | if (err_mask & AC_ERR_HOST_BUS) | |
1417 | return "host bus error"; | |
1418 | if (err_mask & AC_ERR_ATA_BUS) | |
1419 | return "ATA bus error"; | |
1420 | if (err_mask & AC_ERR_TIMEOUT) | |
1421 | return "timeout"; | |
1422 | if (err_mask & AC_ERR_HSM) | |
1423 | return "HSM violation"; | |
1424 | if (err_mask & AC_ERR_SYSTEM) | |
1425 | return "internal error"; | |
1426 | if (err_mask & AC_ERR_MEDIA) | |
1427 | return "media error"; | |
1428 | if (err_mask & AC_ERR_INVALID) | |
1429 | return "invalid argument"; | |
1430 | if (err_mask & AC_ERR_DEV) | |
1431 | return "device error"; | |
54fb131b DLM |
1432 | if (err_mask & AC_ERR_NCQ) |
1433 | return "NCQ error"; | |
1434 | if (err_mask & AC_ERR_NODEV_HINT) | |
1435 | return "Polling detection error"; | |
022bdb07 TH |
1436 | return "unknown error"; |
1437 | } | |
1438 | ||
e8ee8451 TH |
1439 | /** |
1440 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1441 | * @dev: Device to read log page 10h from | |
1442 | * @tag: Resulting tag of the failed command | |
1443 | * @tf: Resulting taskfile registers of the failed command | |
1444 | * | |
1445 | * Read log page 10h to obtain NCQ error details and clear error | |
1446 | * condition. | |
1447 | * | |
1448 | * LOCKING: | |
1449 | * Kernel thread context (may sleep). | |
1450 | * | |
1451 | * RETURNS: | |
1452 | * 0 on success, -errno otherwise. | |
1453 | */ | |
1454 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1455 | int *tag, struct ata_taskfile *tf) | |
1456 | { | |
9af5c9c9 | 1457 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1458 | unsigned int err_mask; |
1459 | u8 csum; | |
1460 | int i; | |
1461 | ||
65fe1f0f | 1462 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, 0, buf, 1); |
e8ee8451 TH |
1463 | if (err_mask) |
1464 | return -EIO; | |
1465 | ||
1466 | csum = 0; | |
1467 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1468 | csum += buf[i]; | |
1469 | if (csum) | |
a9a79dfe JP |
1470 | ata_dev_warn(dev, "invalid checksum 0x%x on log page 10h\n", |
1471 | csum); | |
e8ee8451 TH |
1472 | |
1473 | if (buf[0] & 0x80) | |
1474 | return -ENOENT; | |
1475 | ||
1476 | *tag = buf[0] & 0x1f; | |
1477 | ||
1478 | tf->command = buf[2]; | |
1479 | tf->feature = buf[3]; | |
1480 | tf->lbal = buf[4]; | |
1481 | tf->lbam = buf[5]; | |
1482 | tf->lbah = buf[6]; | |
1483 | tf->device = buf[7]; | |
1484 | tf->hob_lbal = buf[8]; | |
1485 | tf->hob_lbam = buf[9]; | |
1486 | tf->hob_lbah = buf[10]; | |
1487 | tf->nsect = buf[12]; | |
1488 | tf->hob_nsect = buf[13]; | |
5b01e4b9 HR |
1489 | if (ata_id_has_ncq_autosense(dev->id)) |
1490 | tf->auxiliary = buf[14] << 16 | buf[15] << 8 | buf[16]; | |
e8ee8451 TH |
1491 | |
1492 | return 0; | |
1493 | } | |
1494 | ||
11fc33da TH |
1495 | /** |
1496 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1497 | * @dev: target ATAPI device | |
1498 | * @r_sense_key: out parameter for sense_key | |
1499 | * | |
1500 | * Perform ATAPI TEST_UNIT_READY. | |
1501 | * | |
1502 | * LOCKING: | |
1503 | * EH context (may sleep). | |
1504 | * | |
1505 | * RETURNS: | |
1506 | * 0 on success, AC_ERR_* mask on failure. | |
1507 | */ | |
3dc67440 | 1508 | unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) |
11fc33da TH |
1509 | { |
1510 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1511 | struct ata_taskfile tf; | |
1512 | unsigned int err_mask; | |
1513 | ||
1514 | ata_tf_init(dev, &tf); | |
1515 | ||
1516 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1517 | tf.command = ATA_CMD_PACKET; | |
1518 | tf.protocol = ATAPI_PROT_NODATA; | |
1519 | ||
1520 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1521 | if (err_mask == AC_ERR_DEV) | |
1522 | *r_sense_key = tf.feature >> 4; | |
1523 | return err_mask; | |
1524 | } | |
1525 | ||
e87fd28c HR |
1526 | /** |
1527 | * ata_eh_request_sense - perform REQUEST_SENSE_DATA_EXT | |
2f60e1ab | 1528 | * @qc: qc to perform REQUEST_SENSE_SENSE_DATA_EXT to |
e87fd28c HR |
1529 | * @cmd: scsi command for which the sense code should be set |
1530 | * | |
1531 | * Perform REQUEST_SENSE_DATA_EXT after the device reported CHECK | |
1532 | * SENSE. This function is an EH helper. | |
1533 | * | |
1534 | * LOCKING: | |
1535 | * Kernel thread context (may sleep). | |
1536 | */ | |
1537 | static void ata_eh_request_sense(struct ata_queued_cmd *qc, | |
1538 | struct scsi_cmnd *cmd) | |
1539 | { | |
1540 | struct ata_device *dev = qc->dev; | |
1541 | struct ata_taskfile tf; | |
1542 | unsigned int err_mask; | |
1543 | ||
1544 | if (qc->ap->pflags & ATA_PFLAG_FROZEN) { | |
1545 | ata_dev_warn(dev, "sense data available but port frozen\n"); | |
1546 | return; | |
1547 | } | |
1548 | ||
d238ffd5 | 1549 | if (!cmd || qc->flags & ATA_QCFLAG_SENSE_VALID) |
e87fd28c HR |
1550 | return; |
1551 | ||
1552 | if (!ata_id_sense_reporting_enabled(dev->id)) { | |
1553 | ata_dev_warn(qc->dev, "sense data reporting disabled\n"); | |
1554 | return; | |
1555 | } | |
1556 | ||
1557 | DPRINTK("ATA request sense\n"); | |
1558 | ||
1559 | ata_tf_init(dev, &tf); | |
1560 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1561 | tf.flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
1562 | tf.command = ATA_CMD_REQ_SENSE_DATA; | |
1563 | tf.protocol = ATA_PROT_NODATA; | |
1564 | ||
1565 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
1566 | /* Ignore err_mask; ATA_ERR might be set */ | |
1567 | if (tf.command & ATA_SENSE) { | |
06dbde5f | 1568 | ata_scsi_set_sense(dev, cmd, tf.lbah, tf.lbam, tf.lbal); |
e87fd28c HR |
1569 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
1570 | } else { | |
1571 | ata_dev_warn(dev, "request sense failed stat %02x emask %x\n", | |
1572 | tf.command, err_mask); | |
1573 | } | |
1574 | } | |
1575 | ||
022bdb07 TH |
1576 | /** |
1577 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1578 | * @dev: device to perform REQUEST_SENSE to | |
1579 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1580 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1581 | * |
1582 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1583 | * SENSE. This function is EH helper. | |
1584 | * | |
1585 | * LOCKING: | |
1586 | * Kernel thread context (may sleep). | |
1587 | * | |
1588 | * RETURNS: | |
1589 | * 0 on success, AC_ERR_* mask on failure | |
1590 | */ | |
3dc67440 | 1591 | unsigned int atapi_eh_request_sense(struct ata_device *dev, |
3eabddb8 | 1592 | u8 *sense_buf, u8 dfl_sense_key) |
022bdb07 | 1593 | { |
3eabddb8 TH |
1594 | u8 cdb[ATAPI_CDB_LEN] = |
1595 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1596 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1597 | struct ata_taskfile tf; |
022bdb07 TH |
1598 | |
1599 | DPRINTK("ATAPI request sense\n"); | |
1600 | ||
022bdb07 TH |
1601 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
1602 | ||
56287768 AL |
1603 | /* initialize sense_buf with the error register, |
1604 | * for the case where they are -not- overwritten | |
1605 | */ | |
022bdb07 | 1606 | sense_buf[0] = 0x70; |
3eabddb8 | 1607 | sense_buf[2] = dfl_sense_key; |
56287768 | 1608 | |
a617c09f | 1609 | /* some devices time out if garbage left in tf */ |
56287768 | 1610 | ata_tf_init(dev, &tf); |
022bdb07 | 1611 | |
022bdb07 TH |
1612 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1613 | tf.command = ATA_CMD_PACKET; | |
1614 | ||
1615 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1616 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1617 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1618 | tf.feature |= ATAPI_PKT_DMA; |
1619 | } else { | |
0dc36888 | 1620 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1621 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1622 | tf.lbah = 0; | |
022bdb07 TH |
1623 | } |
1624 | ||
1625 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1626 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1627 | } |
1628 | ||
1629 | /** | |
1630 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1631 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1632 | * |
1633 | * Analyze SError if available and further determine cause of | |
1634 | * failure. | |
1635 | * | |
1636 | * LOCKING: | |
1637 | * None. | |
1638 | */ | |
0260731f | 1639 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1640 | { |
0260731f | 1641 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1642 | u32 serror = ehc->i.serror; |
1643 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1644 | u32 hotplug_mask; |
022bdb07 | 1645 | |
e0614db2 | 1646 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1647 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1648 | action |= ATA_EH_RESET; |
022bdb07 TH |
1649 | } |
1650 | if (serror & SERR_PROTOCOL) { | |
1651 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1652 | action |= ATA_EH_RESET; |
022bdb07 TH |
1653 | } |
1654 | if (serror & SERR_INTERNAL) { | |
1655 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1656 | action |= ATA_EH_RESET; |
022bdb07 | 1657 | } |
f9df58cb TH |
1658 | |
1659 | /* Determine whether a hotplug event has occurred. Both | |
1660 | * SError.N/X are considered hotplug events for enabled or | |
1661 | * host links. For disabled PMP links, only N bit is | |
1662 | * considered as X bit is left at 1 for link plugging. | |
1663 | */ | |
eb0e85e3 | 1664 | if (link->lpm_policy > ATA_LPM_MAX_POWER) |
6b7ae954 TH |
1665 | hotplug_mask = 0; /* hotplug doesn't work w/ LPM */ |
1666 | else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
f9df58cb TH |
1667 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
1668 | else | |
1669 | hotplug_mask = SERR_PHYRDY_CHG; | |
1670 | ||
1671 | if (serror & hotplug_mask) | |
084fe639 | 1672 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1673 | |
1674 | ehc->i.err_mask |= err_mask; | |
1675 | ehc->i.action |= action; | |
1676 | } | |
1677 | ||
e8ee8451 TH |
1678 | /** |
1679 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1680 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1681 | * |
1682 | * Read log page 10h, determine the offending qc and acquire | |
1683 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1684 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1685 | * care of the rest. | |
1686 | * | |
1687 | * LOCKING: | |
1688 | * Kernel thread context (may sleep). | |
1689 | */ | |
10acf3b0 | 1690 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1691 | { |
0260731f TH |
1692 | struct ata_port *ap = link->ap; |
1693 | struct ata_eh_context *ehc = &link->eh_context; | |
1694 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1695 | struct ata_queued_cmd *qc; |
1696 | struct ata_taskfile tf; | |
1697 | int tag, rc; | |
1698 | ||
1699 | /* if frozen, we can't do much */ | |
b51e9e5d | 1700 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1701 | return; |
1702 | ||
1703 | /* is it NCQ device error? */ | |
0260731f | 1704 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1705 | return; |
1706 | ||
1707 | /* has LLDD analyzed already? */ | |
258c4e5c | 1708 | ata_qc_for_each_raw(ap, qc, tag) { |
e8ee8451 TH |
1709 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
1710 | continue; | |
1711 | ||
1712 | if (qc->err_mask) | |
1713 | return; | |
1714 | } | |
1715 | ||
1716 | /* okay, this error is ours */ | |
a09bf4cd | 1717 | memset(&tf, 0, sizeof(tf)); |
e8ee8451 TH |
1718 | rc = ata_eh_read_log_10h(dev, &tag, &tf); |
1719 | if (rc) { | |
a9a79dfe JP |
1720 | ata_link_err(link, "failed to read log page 10h (errno=%d)\n", |
1721 | rc); | |
e8ee8451 TH |
1722 | return; |
1723 | } | |
1724 | ||
0260731f | 1725 | if (!(link->sactive & (1 << tag))) { |
a9a79dfe JP |
1726 | ata_link_err(link, "log page 10h reported inactive tag %d\n", |
1727 | tag); | |
e8ee8451 TH |
1728 | return; |
1729 | } | |
1730 | ||
1731 | /* we've got the perpetrator, condemn it */ | |
1732 | qc = __ata_qc_from_tag(ap, tag); | |
1733 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1734 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1735 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
d238ffd5 | 1736 | if ((qc->result_tf.command & ATA_SENSE) || qc->result_tf.auxiliary) { |
5b01e4b9 HR |
1737 | char sense_key, asc, ascq; |
1738 | ||
1739 | sense_key = (qc->result_tf.auxiliary >> 16) & 0xff; | |
1740 | asc = (qc->result_tf.auxiliary >> 8) & 0xff; | |
1741 | ascq = qc->result_tf.auxiliary & 0xff; | |
06dbde5f | 1742 | ata_scsi_set_sense(dev, qc->scsicmd, sense_key, asc, ascq); |
492bf621 HR |
1743 | ata_scsi_set_sense_information(dev, qc->scsicmd, |
1744 | &qc->result_tf); | |
5b01e4b9 HR |
1745 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
1746 | } | |
1747 | ||
e8ee8451 TH |
1748 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1749 | } | |
1750 | ||
022bdb07 TH |
1751 | /** |
1752 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1753 | * @qc: qc to analyze | |
1754 | * @tf: Taskfile registers to analyze | |
1755 | * | |
1756 | * Analyze taskfile of @qc and further determine cause of | |
1757 | * failure. This function also requests ATAPI sense data if | |
25985edc | 1758 | * available. |
022bdb07 TH |
1759 | * |
1760 | * LOCKING: | |
1761 | * Kernel thread context (may sleep). | |
1762 | * | |
1763 | * RETURNS: | |
1764 | * Determined recovery action | |
1765 | */ | |
1766 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1767 | const struct ata_taskfile *tf) | |
1768 | { | |
1769 | unsigned int tmp, action = 0; | |
1770 | u8 stat = tf->command, err = tf->feature; | |
1771 | ||
1772 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1773 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1774 | return ATA_EH_RESET; |
022bdb07 TH |
1775 | } |
1776 | ||
e87fd28c | 1777 | if (stat & (ATA_ERR | ATA_DF)) { |
a51d644a | 1778 | qc->err_mask |= AC_ERR_DEV; |
e87fd28c HR |
1779 | /* |
1780 | * Sense data reporting does not work if the | |
1781 | * device fault bit is set. | |
1782 | */ | |
1783 | if (stat & ATA_DF) | |
1784 | stat &= ~ATA_SENSE; | |
1785 | } else { | |
022bdb07 | 1786 | return 0; |
e87fd28c | 1787 | } |
022bdb07 TH |
1788 | |
1789 | switch (qc->dev->class) { | |
1790 | case ATA_DEV_ATA: | |
9162c657 | 1791 | case ATA_DEV_ZAC: |
e87fd28c HR |
1792 | if (stat & ATA_SENSE) |
1793 | ata_eh_request_sense(qc, qc->scsicmd); | |
022bdb07 TH |
1794 | if (err & ATA_ICRC) |
1795 | qc->err_mask |= AC_ERR_ATA_BUS; | |
eec7e1c1 | 1796 | if (err & (ATA_UNC | ATA_AMNF)) |
022bdb07 TH |
1797 | qc->err_mask |= AC_ERR_MEDIA; |
1798 | if (err & ATA_IDNF) | |
1799 | qc->err_mask |= AC_ERR_INVALID; | |
1800 | break; | |
1801 | ||
1802 | case ATA_DEV_ATAPI: | |
a569a30d | 1803 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1804 | tmp = atapi_eh_request_sense(qc->dev, |
1805 | qc->scsicmd->sense_buffer, | |
1806 | qc->result_tf.feature >> 4); | |
3852e373 | 1807 | if (!tmp) |
a569a30d | 1808 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
3852e373 | 1809 | else |
a569a30d TH |
1810 | qc->err_mask |= tmp; |
1811 | } | |
022bdb07 TH |
1812 | } |
1813 | ||
3852e373 HR |
1814 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { |
1815 | int ret = scsi_check_sense(qc->scsicmd); | |
1816 | /* | |
79487259 | 1817 | * SUCCESS here means that the sense code could be |
3852e373 HR |
1818 | * evaluated and should be passed to the upper layers |
1819 | * for correct evaluation. | |
79487259 | 1820 | * FAILED means the sense code could not be interpreted |
3852e373 HR |
1821 | * and the device would need to be reset. |
1822 | * NEEDS_RETRY and ADD_TO_MLQUEUE means that the | |
1823 | * command would need to be retried. | |
1824 | */ | |
1825 | if (ret == NEEDS_RETRY || ret == ADD_TO_MLQUEUE) { | |
1826 | qc->flags |= ATA_QCFLAG_RETRY; | |
1827 | qc->err_mask |= AC_ERR_OTHER; | |
1828 | } else if (ret != SUCCESS) { | |
1829 | qc->err_mask |= AC_ERR_HSM; | |
1830 | } | |
1831 | } | |
022bdb07 | 1832 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) |
cf480626 | 1833 | action |= ATA_EH_RESET; |
022bdb07 TH |
1834 | |
1835 | return action; | |
1836 | } | |
1837 | ||
76326ac1 TH |
1838 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1839 | int *xfer_ok) | |
022bdb07 | 1840 | { |
76326ac1 TH |
1841 | int base = 0; |
1842 | ||
1843 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1844 | *xfer_ok = 1; | |
1845 | ||
1846 | if (!*xfer_ok) | |
75f9cafc | 1847 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1848 | |
7d47e8d4 | 1849 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1850 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1851 | |
7d47e8d4 | 1852 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1853 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1854 | |
3884f7b0 | 1855 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1856 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1857 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1858 | if ((err_mask & |
1859 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1860 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1861 | } |
1862 | ||
1863 | return 0; | |
1864 | } | |
1865 | ||
7d47e8d4 | 1866 | struct speed_down_verdict_arg { |
022bdb07 | 1867 | u64 since; |
76326ac1 | 1868 | int xfer_ok; |
3884f7b0 | 1869 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1870 | }; |
1871 | ||
7d47e8d4 | 1872 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1873 | { |
7d47e8d4 | 1874 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1875 | int cat; |
022bdb07 | 1876 | |
d9027470 | 1877 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since)) |
022bdb07 TH |
1878 | return -1; |
1879 | ||
76326ac1 TH |
1880 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1881 | &arg->xfer_ok); | |
7d47e8d4 | 1882 | arg->nr_errors[cat]++; |
76326ac1 | 1883 | |
022bdb07 TH |
1884 | return 0; |
1885 | } | |
1886 | ||
1887 | /** | |
7d47e8d4 | 1888 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1889 | * @dev: Device of interest |
1890 | * | |
1891 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1892 | * whether NCQ needs to be turned off, transfer speed should be |
1893 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1894 | * |
3884f7b0 TH |
1895 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1896 | * | |
1897 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1898 | * IO commands | |
1899 | * | |
1900 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1901 | * | |
76326ac1 TH |
1902 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1903 | * data transfer hasn't been verified. | |
1904 | * | |
3884f7b0 TH |
1905 | * Verdicts are |
1906 | * | |
1907 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1908 | * |
3884f7b0 TH |
1909 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1910 | * to PIO. | |
7d47e8d4 | 1911 | * |
3884f7b0 | 1912 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1913 | * |
3884f7b0 | 1914 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1915 | * taken per error. An action triggered by non-DUBIOUS errors |
1916 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1917 | * This is to expedite speed down decisions right after device is | |
1918 | * initially configured. | |
1919 | * | |
4091fb95 | 1920 | * The following are speed down rules. #1 and #2 deal with |
76326ac1 | 1921 | * DUBIOUS errors. |
7d47e8d4 | 1922 | * |
76326ac1 TH |
1923 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1924 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1925 | * | |
1926 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1927 | * occurred during last 5 mins, NCQ_OFF. | |
1928 | * | |
1929 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
25985edc | 1930 | * occurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1931 | * |
76326ac1 | 1932 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1933 | * during last 10 mins, NCQ_OFF. |
1934 | * | |
76326ac1 | 1935 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1936 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1937 | * |
022bdb07 TH |
1938 | * LOCKING: |
1939 | * Inherited from caller. | |
1940 | * | |
1941 | * RETURNS: | |
7d47e8d4 | 1942 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1943 | */ |
7d47e8d4 | 1944 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1945 | { |
7d47e8d4 TH |
1946 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1947 | u64 j64 = get_jiffies_64(); | |
1948 | struct speed_down_verdict_arg arg; | |
1949 | unsigned int verdict = 0; | |
022bdb07 | 1950 | |
3884f7b0 | 1951 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1952 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1953 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1954 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1955 | |
76326ac1 TH |
1956 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1957 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1958 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1959 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1960 | ||
1961 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1962 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1963 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1964 | ||
3884f7b0 TH |
1965 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1966 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1967 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1968 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1969 | |
3884f7b0 | 1970 | /* scan past 10 mins of error history */ |
022bdb07 | 1971 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1972 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1973 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1974 | |
3884f7b0 TH |
1975 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1976 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1977 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1978 | ||
1979 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1980 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1981 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1982 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1983 | |
7d47e8d4 | 1984 | return verdict; |
022bdb07 TH |
1985 | } |
1986 | ||
1987 | /** | |
1988 | * ata_eh_speed_down - record error and speed down if necessary | |
1989 | * @dev: Failed device | |
3884f7b0 | 1990 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1991 | * @err_mask: err_mask of the error |
1992 | * | |
1993 | * Record error and examine error history to determine whether | |
1994 | * adjusting transmission speed is necessary. It also sets | |
1995 | * transmission limits appropriately if such adjustment is | |
1996 | * necessary. | |
1997 | * | |
1998 | * LOCKING: | |
1999 | * Kernel thread context (may sleep). | |
2000 | * | |
2001 | * RETURNS: | |
7d47e8d4 | 2002 | * Determined recovery action. |
022bdb07 | 2003 | */ |
3884f7b0 TH |
2004 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
2005 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 2006 | { |
b1c72916 | 2007 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 2008 | int xfer_ok = 0; |
7d47e8d4 TH |
2009 | unsigned int verdict; |
2010 | unsigned int action = 0; | |
2011 | ||
2012 | /* don't bother if Cat-0 error */ | |
76326ac1 | 2013 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
2014 | return 0; |
2015 | ||
2016 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 2017 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 2018 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 2019 | |
7d47e8d4 TH |
2020 | /* turn off NCQ? */ |
2021 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
2022 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
2023 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
2024 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
a9a79dfe | 2025 | ata_dev_warn(dev, "NCQ disabled due to excessive errors\n"); |
7d47e8d4 TH |
2026 | goto done; |
2027 | } | |
022bdb07 | 2028 | |
7d47e8d4 TH |
2029 | /* speed down? */ |
2030 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
2031 | /* speed down SATA link speed if possible */ | |
a07d499b | 2032 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 2033 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2034 | goto done; |
2035 | } | |
022bdb07 | 2036 | |
7d47e8d4 TH |
2037 | /* lower transfer mode */ |
2038 | if (dev->spdn_cnt < 2) { | |
2039 | static const int dma_dnxfer_sel[] = | |
2040 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
2041 | static const int pio_dnxfer_sel[] = | |
2042 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
2043 | int sel; | |
2044 | ||
2045 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
2046 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
2047 | else | |
2048 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
2049 | ||
2050 | dev->spdn_cnt++; | |
2051 | ||
2052 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 2053 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2054 | goto done; |
2055 | } | |
2056 | } | |
2057 | } | |
2058 | ||
2059 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 2060 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
2061 | */ |
2062 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 2063 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
2064 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
2065 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
2066 | dev->spdn_cnt = 0; | |
cf480626 | 2067 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2068 | goto done; |
2069 | } | |
2070 | } | |
022bdb07 | 2071 | |
022bdb07 | 2072 | return 0; |
7d47e8d4 TH |
2073 | done: |
2074 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
2075 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
2076 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 2077 | return action; |
022bdb07 TH |
2078 | } |
2079 | ||
8d899e70 ML |
2080 | /** |
2081 | * ata_eh_worth_retry - analyze error and decide whether to retry | |
2082 | * @qc: qc to possibly retry | |
2083 | * | |
2084 | * Look at the cause of the error and decide if a retry | |
2085 | * might be useful or not. We don't want to retry media errors | |
2086 | * because the drive itself has probably already taken 10-30 seconds | |
2087 | * doing its own internal retries before reporting the failure. | |
2088 | */ | |
2089 | static inline int ata_eh_worth_retry(struct ata_queued_cmd *qc) | |
2090 | { | |
1eaca39a | 2091 | if (qc->err_mask & AC_ERR_MEDIA) |
8d899e70 ML |
2092 | return 0; /* don't retry media errors */ |
2093 | if (qc->flags & ATA_QCFLAG_IO) | |
2094 | return 1; /* otherwise retry anything from fs stack */ | |
2095 | if (qc->err_mask & AC_ERR_INVALID) | |
2096 | return 0; /* don't retry these */ | |
2097 | return qc->err_mask != AC_ERR_DEV; /* retry if not dev error */ | |
2098 | } | |
2099 | ||
7eb49509 DLM |
2100 | /** |
2101 | * ata_eh_quiet - check if we need to be quiet about a command error | |
2102 | * @qc: qc to check | |
2103 | * | |
2104 | * Look at the qc flags anbd its scsi command request flags to determine | |
2105 | * if we need to be quiet about the command failure. | |
2106 | */ | |
2107 | static inline bool ata_eh_quiet(struct ata_queued_cmd *qc) | |
2108 | { | |
2109 | if (qc->scsicmd && | |
2110 | qc->scsicmd->request->rq_flags & RQF_QUIET) | |
2111 | qc->flags |= ATA_QCFLAG_QUIET; | |
2112 | return qc->flags & ATA_QCFLAG_QUIET; | |
2113 | } | |
2114 | ||
022bdb07 | 2115 | /** |
9b1e2658 TH |
2116 | * ata_eh_link_autopsy - analyze error and determine recovery action |
2117 | * @link: host link to perform autopsy on | |
022bdb07 | 2118 | * |
0260731f TH |
2119 | * Analyze why @link failed and determine which recovery actions |
2120 | * are needed. This function also sets more detailed AC_ERR_* | |
2121 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
2122 | * |
2123 | * LOCKING: | |
2124 | * Kernel thread context (may sleep). | |
2125 | */ | |
9b1e2658 | 2126 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 2127 | { |
0260731f | 2128 | struct ata_port *ap = link->ap; |
936fd732 | 2129 | struct ata_eh_context *ehc = &link->eh_context; |
258c4e5c | 2130 | struct ata_queued_cmd *qc; |
dfcc173d | 2131 | struct ata_device *dev; |
3884f7b0 | 2132 | unsigned int all_err_mask = 0, eflags = 0; |
7eb49509 | 2133 | int tag, nr_failed = 0, nr_quiet = 0; |
022bdb07 TH |
2134 | u32 serror; |
2135 | int rc; | |
2136 | ||
2137 | DPRINTK("ENTER\n"); | |
2138 | ||
1cdaf534 TH |
2139 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
2140 | return; | |
2141 | ||
022bdb07 | 2142 | /* obtain and analyze SError */ |
936fd732 | 2143 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
2144 | if (rc == 0) { |
2145 | ehc->i.serror |= serror; | |
0260731f | 2146 | ata_eh_analyze_serror(link); |
4e57c517 | 2147 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 2148 | /* SError read failed, force reset and probing */ |
b558eddd | 2149 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 2150 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
2151 | ehc->i.err_mask |= AC_ERR_OTHER; |
2152 | } | |
022bdb07 | 2153 | |
e8ee8451 | 2154 | /* analyze NCQ failure */ |
0260731f | 2155 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 2156 | |
022bdb07 TH |
2157 | /* any real error trumps AC_ERR_OTHER */ |
2158 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
2159 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
2160 | ||
2161 | all_err_mask |= ehc->i.err_mask; | |
2162 | ||
258c4e5c | 2163 | ata_qc_for_each_raw(ap, qc, tag) { |
b1c72916 TH |
2164 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2165 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
2166 | continue; |
2167 | ||
2168 | /* inherit upper level err_mask */ | |
2169 | qc->err_mask |= ehc->i.err_mask; | |
2170 | ||
022bdb07 | 2171 | /* analyze TF */ |
4528e4da | 2172 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
2173 | |
2174 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
2175 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
2176 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
2177 | AC_ERR_INVALID); | |
2178 | ||
2179 | /* any real error trumps unknown error */ | |
2180 | if (qc->err_mask & ~AC_ERR_OTHER) | |
2181 | qc->err_mask &= ~AC_ERR_OTHER; | |
2182 | ||
804689ad DLM |
2183 | /* |
2184 | * SENSE_VALID trumps dev/unknown error and revalidation. Upper | |
2185 | * layers will determine whether the command is worth retrying | |
2186 | * based on the sense data and device class/type. Otherwise, | |
2187 | * determine directly if the command is worth retrying using its | |
2188 | * error mask and flags. | |
2189 | */ | |
f90f0828 | 2190 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 2191 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
804689ad | 2192 | else if (ata_eh_worth_retry(qc)) |
03faab78 TH |
2193 | qc->flags |= ATA_QCFLAG_RETRY; |
2194 | ||
022bdb07 | 2195 | /* accumulate error info */ |
4528e4da | 2196 | ehc->i.dev = qc->dev; |
022bdb07 TH |
2197 | all_err_mask |= qc->err_mask; |
2198 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 2199 | eflags |= ATA_EFLAG_IS_IO; |
255c03d1 | 2200 | trace_ata_eh_link_autopsy_qc(qc); |
7eb49509 DLM |
2201 | |
2202 | /* Count quiet errors */ | |
2203 | if (ata_eh_quiet(qc)) | |
2204 | nr_quiet++; | |
2205 | nr_failed++; | |
022bdb07 TH |
2206 | } |
2207 | ||
7eb49509 DLM |
2208 | /* If all failed commands requested silence, then be quiet */ |
2209 | if (nr_quiet == nr_failed) | |
2210 | ehc->i.flags |= ATA_EHI_QUIET; | |
2211 | ||
a20f33ff | 2212 | /* enforce default EH actions */ |
b51e9e5d | 2213 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 2214 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2215 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2216 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2217 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2218 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2219 | |
dfcc173d TH |
2220 | /* If we have offending qcs and the associated failed device, |
2221 | * perform per-dev EH action only on the offending device. | |
2222 | */ | |
4528e4da | 2223 | if (ehc->i.dev) { |
4528e4da TH |
2224 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2225 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2226 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2227 | } |
2228 | ||
2695e366 TH |
2229 | /* propagate timeout to host link */ |
2230 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2231 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2232 | ||
2233 | /* record error and consider speeding down */ | |
dfcc173d | 2234 | dev = ehc->i.dev; |
2695e366 TH |
2235 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2236 | ata_dev_enabled(link->device)))) | |
2237 | dev = link->device; | |
dfcc173d | 2238 | |
76326ac1 TH |
2239 | if (dev) { |
2240 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2241 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2242 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
f1601113 | 2243 | trace_ata_eh_link_autopsy(dev, ehc->i.action, all_err_mask); |
76326ac1 | 2244 | } |
022bdb07 TH |
2245 | DPRINTK("EXIT\n"); |
2246 | } | |
2247 | ||
2248 | /** | |
9b1e2658 TH |
2249 | * ata_eh_autopsy - analyze error and determine recovery action |
2250 | * @ap: host port to perform autopsy on | |
2251 | * | |
2252 | * Analyze all links of @ap and determine why they failed and | |
2253 | * which recovery actions are needed. | |
2254 | * | |
2255 | * LOCKING: | |
2256 | * Kernel thread context (may sleep). | |
2257 | */ | |
fb7fd614 | 2258 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2259 | { |
2260 | struct ata_link *link; | |
2261 | ||
1eca4365 | 2262 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2263 | ata_eh_link_autopsy(link); |
2695e366 | 2264 | |
b1c72916 TH |
2265 | /* Handle the frigging slave link. Autopsy is done similarly |
2266 | * but actions and flags are transferred over to the master | |
2267 | * link and handled from there. | |
2268 | */ | |
2269 | if (ap->slave_link) { | |
2270 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2271 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2272 | ||
848e4c68 TH |
2273 | /* transfer control flags from master to slave */ |
2274 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2275 | ||
2276 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2277 | ata_eh_link_autopsy(ap->slave_link); |
2278 | ||
848e4c68 | 2279 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2280 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2281 | mehc->i.action |= sehc->i.action; | |
2282 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2283 | mehc->i.flags |= sehc->i.flags; | |
2284 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2285 | } | |
2286 | ||
2695e366 TH |
2287 | /* Autopsy of fanout ports can affect host link autopsy. |
2288 | * Perform host link autopsy last. | |
2289 | */ | |
071f44b1 | 2290 | if (sata_pmp_attached(ap)) |
2695e366 | 2291 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2292 | } |
2293 | ||
6521148c RH |
2294 | /** |
2295 | * ata_get_cmd_descript - get description for ATA command | |
2296 | * @command: ATA command code to get description for | |
2297 | * | |
2298 | * Return a textual description of the given command, or NULL if the | |
2299 | * command is not known. | |
2300 | * | |
2301 | * LOCKING: | |
2302 | * None | |
2303 | */ | |
2304 | const char *ata_get_cmd_descript(u8 command) | |
2305 | { | |
2306 | #ifdef CONFIG_ATA_VERBOSE_ERROR | |
2307 | static const struct | |
2308 | { | |
2309 | u8 command; | |
2310 | const char *text; | |
2311 | } cmd_descr[] = { | |
2312 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, | |
825e2d87 HR |
2313 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, |
2314 | { ATA_CMD_STANDBY, "STANDBY" }, | |
2315 | { ATA_CMD_IDLE, "IDLE" }, | |
2316 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, | |
2317 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, | |
3915c3b5 | 2318 | { ATA_CMD_DOWNLOAD_MICRO_DMA, "DOWNLOAD MICROCODE DMA" }, |
6521148c | 2319 | { ATA_CMD_NOP, "NOP" }, |
825e2d87 HR |
2320 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, |
2321 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, | |
2322 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, | |
2323 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, | |
2324 | { ATA_CMD_SERVICE, "SERVICE" }, | |
2325 | { ATA_CMD_READ, "READ DMA" }, | |
2326 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, | |
2327 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, | |
2328 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, | |
6521148c | 2329 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, |
825e2d87 HR |
2330 | { ATA_CMD_WRITE, "WRITE DMA" }, |
2331 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, | |
2332 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, | |
2333 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, | |
6521148c RH |
2334 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, |
2335 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, | |
2336 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, | |
2337 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, | |
2338 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, | |
3915c3b5 RH |
2339 | { ATA_CMD_FPDMA_SEND, "SEND FPDMA QUEUED" }, |
2340 | { ATA_CMD_FPDMA_RECV, "RECEIVE FPDMA QUEUED" }, | |
6521148c RH |
2341 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, |
2342 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, | |
2343 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, | |
2344 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, | |
2345 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, | |
2346 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, | |
2347 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, | |
2348 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, | |
825e2d87 | 2349 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, |
6521148c RH |
2350 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, |
2351 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, | |
2352 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, | |
2353 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, | |
2354 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, | |
2355 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, | |
2356 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, | |
2357 | { ATA_CMD_SLEEP, "SLEEP" }, | |
2358 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, | |
2359 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, | |
2360 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, | |
2361 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, | |
2362 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, | |
2363 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, | |
2364 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, | |
2365 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, | |
825e2d87 | 2366 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, |
3915c3b5 | 2367 | { ATA_CMD_TRUSTED_NONDATA, "TRUSTED NON-DATA" }, |
6521148c | 2368 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, |
825e2d87 | 2369 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, |
6521148c | 2370 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, |
825e2d87 | 2371 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, |
6521148c | 2372 | { ATA_CMD_PMP_READ, "READ BUFFER" }, |
3915c3b5 | 2373 | { ATA_CMD_PMP_READ_DMA, "READ BUFFER DMA" }, |
6521148c | 2374 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, |
3915c3b5 | 2375 | { ATA_CMD_PMP_WRITE_DMA, "WRITE BUFFER DMA" }, |
6521148c RH |
2376 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, |
2377 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, | |
2378 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, | |
2379 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, | |
2380 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, | |
2381 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, | |
2382 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, | |
2383 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, | |
2384 | { ATA_CMD_SMART, "SMART" }, | |
2385 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, | |
2386 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, | |
acad7627 | 2387 | { ATA_CMD_DSM, "DATA SET MANAGEMENT" }, |
825e2d87 HR |
2388 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, |
2389 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, | |
6521148c RH |
2390 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, |
2391 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, | |
2392 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, | |
825e2d87 | 2393 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, |
3915c3b5 RH |
2394 | { ATA_CMD_REQ_SENSE_DATA, "REQUEST SENSE DATA EXT" }, |
2395 | { ATA_CMD_SANITIZE_DEVICE, "SANITIZE DEVICE" }, | |
28a3fc22 | 2396 | { ATA_CMD_ZAC_MGMT_IN, "ZAC MANAGEMENT IN" }, |
27708a95 | 2397 | { ATA_CMD_ZAC_MGMT_OUT, "ZAC MANAGEMENT OUT" }, |
6521148c RH |
2398 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, |
2399 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, | |
2400 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, | |
2401 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, | |
2402 | { ATA_CMD_RESTORE, "RECALIBRATE" }, | |
2403 | { 0, NULL } /* terminate list */ | |
2404 | }; | |
2405 | ||
2406 | unsigned int i; | |
2407 | for (i = 0; cmd_descr[i].text; i++) | |
2408 | if (cmd_descr[i].command == command) | |
2409 | return cmd_descr[i].text; | |
2410 | #endif | |
2411 | ||
2412 | return NULL; | |
2413 | } | |
36aae28e | 2414 | EXPORT_SYMBOL_GPL(ata_get_cmd_descript); |
6521148c | 2415 | |
9b1e2658 TH |
2416 | /** |
2417 | * ata_eh_link_report - report error handling to user | |
0260731f | 2418 | * @link: ATA link EH is going on |
022bdb07 TH |
2419 | * |
2420 | * Report EH to user. | |
2421 | * | |
2422 | * LOCKING: | |
2423 | * None. | |
2424 | */ | |
9b1e2658 | 2425 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2426 | { |
0260731f TH |
2427 | struct ata_port *ap = link->ap; |
2428 | struct ata_eh_context *ehc = &link->eh_context; | |
258c4e5c | 2429 | struct ata_queued_cmd *qc; |
022bdb07 | 2430 | const char *frozen, *desc; |
462098b0 | 2431 | char tries_buf[6] = ""; |
022bdb07 TH |
2432 | int tag, nr_failed = 0; |
2433 | ||
94ff3d54 TH |
2434 | if (ehc->i.flags & ATA_EHI_QUIET) |
2435 | return; | |
2436 | ||
022bdb07 TH |
2437 | desc = NULL; |
2438 | if (ehc->i.desc[0] != '\0') | |
2439 | desc = ehc->i.desc; | |
2440 | ||
258c4e5c | 2441 | ata_qc_for_each_raw(ap, qc, tag) { |
b1c72916 TH |
2442 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2443 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2444 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2445 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2446 | continue; |
2447 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2448 | continue; | |
2449 | ||
2450 | nr_failed++; | |
2451 | } | |
2452 | ||
2453 | if (!nr_failed && !ehc->i.err_mask) | |
2454 | return; | |
2455 | ||
2456 | frozen = ""; | |
b51e9e5d | 2457 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2458 | frozen = " frozen"; |
2459 | ||
a1e10f7e | 2460 | if (ap->eh_tries < ATA_EH_MAX_TRIES) |
462098b0 | 2461 | snprintf(tries_buf, sizeof(tries_buf), " t%d", |
a1e10f7e TH |
2462 | ap->eh_tries); |
2463 | ||
022bdb07 | 2464 | if (ehc->i.dev) { |
a9a79dfe JP |
2465 | ata_dev_err(ehc->i.dev, "exception Emask 0x%x " |
2466 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2467 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2468 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2469 | if (desc) |
a9a79dfe | 2470 | ata_dev_err(ehc->i.dev, "%s\n", desc); |
022bdb07 | 2471 | } else { |
a9a79dfe JP |
2472 | ata_link_err(link, "exception Emask 0x%x " |
2473 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2474 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2475 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2476 | if (desc) |
a9a79dfe | 2477 | ata_link_err(link, "%s\n", desc); |
022bdb07 TH |
2478 | } |
2479 | ||
6521148c | 2480 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2481 | if (ehc->i.serror) |
a9a79dfe | 2482 | ata_link_err(link, |
1333e194 RH |
2483 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2484 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2485 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2486 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2487 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2488 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2489 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2490 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2491 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2492 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2493 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2494 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2495 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2496 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2497 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2498 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2499 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2500 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
6521148c | 2501 | #endif |
1333e194 | 2502 | |
258c4e5c | 2503 | ata_qc_for_each_raw(ap, qc, tag) { |
8a937581 | 2504 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2505 | char data_buf[20] = ""; |
2506 | char cdb_buf[70] = ""; | |
022bdb07 | 2507 | |
0260731f | 2508 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2509 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2510 | continue; |
2511 | ||
abb6a889 TH |
2512 | if (qc->dma_dir != DMA_NONE) { |
2513 | static const char *dma_str[] = { | |
2514 | [DMA_BIDIRECTIONAL] = "bidi", | |
2515 | [DMA_TO_DEVICE] = "out", | |
2516 | [DMA_FROM_DEVICE] = "in", | |
2517 | }; | |
fb1b8b11 GU |
2518 | const char *prot_str = NULL; |
2519 | ||
2520 | switch (qc->tf.protocol) { | |
2521 | case ATA_PROT_UNKNOWN: | |
2522 | prot_str = "unknown"; | |
2523 | break; | |
2524 | case ATA_PROT_NODATA: | |
2525 | prot_str = "nodata"; | |
2526 | break; | |
2527 | case ATA_PROT_PIO: | |
2528 | prot_str = "pio"; | |
2529 | break; | |
2530 | case ATA_PROT_DMA: | |
2531 | prot_str = "dma"; | |
2532 | break; | |
2533 | case ATA_PROT_NCQ: | |
2534 | prot_str = "ncq dma"; | |
2535 | break; | |
2536 | case ATA_PROT_NCQ_NODATA: | |
2537 | prot_str = "ncq nodata"; | |
2538 | break; | |
2539 | case ATAPI_PROT_NODATA: | |
2540 | prot_str = "nodata"; | |
2541 | break; | |
2542 | case ATAPI_PROT_PIO: | |
2543 | prot_str = "pio"; | |
2544 | break; | |
2545 | case ATAPI_PROT_DMA: | |
2546 | prot_str = "dma"; | |
2547 | break; | |
2548 | } | |
abb6a889 | 2549 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", |
fb1b8b11 | 2550 | prot_str, qc->nbytes, dma_str[qc->dma_dir]); |
abb6a889 TH |
2551 | } |
2552 | ||
6521148c | 2553 | if (ata_is_atapi(qc->tf.protocol)) { |
a13b0c9d HR |
2554 | const u8 *cdb = qc->cdb; |
2555 | size_t cdb_len = qc->dev->cdb_len; | |
2556 | ||
cbba5b0e HR |
2557 | if (qc->scsicmd) { |
2558 | cdb = qc->scsicmd->cmnd; | |
2559 | cdb_len = qc->scsicmd->cmd_len; | |
2560 | } | |
2561 | __scsi_format_command(cdb_buf, sizeof(cdb_buf), | |
2562 | cdb, cdb_len); | |
6521148c RH |
2563 | } else { |
2564 | const char *descr = ata_get_cmd_descript(cmd->command); | |
2565 | if (descr) | |
a9a79dfe JP |
2566 | ata_dev_err(qc->dev, "failed command: %s\n", |
2567 | descr); | |
6521148c | 2568 | } |
abb6a889 | 2569 | |
a9a79dfe | 2570 | ata_dev_err(qc->dev, |
8a937581 | 2571 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
abb6a889 | 2572 | "tag %d%s\n %s" |
8a937581 | 2573 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2574 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2575 | cmd->command, cmd->feature, cmd->nsect, |
2576 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2577 | cmd->hob_feature, cmd->hob_nsect, | |
2578 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2579 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2580 | res->command, res->feature, res->nsect, |
2581 | res->lbal, res->lbam, res->lbah, | |
2582 | res->hob_feature, res->hob_nsect, | |
2583 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2584 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2585 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 | 2586 | |
6521148c | 2587 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2588 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
e87fd28c | 2589 | ATA_SENSE | ATA_ERR)) { |
1333e194 | 2590 | if (res->command & ATA_BUSY) |
a9a79dfe | 2591 | ata_dev_err(qc->dev, "status: { Busy }\n"); |
1333e194 | 2592 | else |
e87fd28c | 2593 | ata_dev_err(qc->dev, "status: { %s%s%s%s%s}\n", |
1333e194 RH |
2594 | res->command & ATA_DRDY ? "DRDY " : "", |
2595 | res->command & ATA_DF ? "DF " : "", | |
2596 | res->command & ATA_DRQ ? "DRQ " : "", | |
e87fd28c | 2597 | res->command & ATA_SENSE ? "SENSE " : "", |
2dcb407e | 2598 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2599 | } |
2600 | ||
2601 | if (cmd->command != ATA_CMD_PACKET && | |
eec7e1c1 AA |
2602 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_AMNF | |
2603 | ATA_IDNF | ATA_ABORTED))) | |
2604 | ata_dev_err(qc->dev, "error: { %s%s%s%s%s}\n", | |
1333e194 RH |
2605 | res->feature & ATA_ICRC ? "ICRC " : "", |
2606 | res->feature & ATA_UNC ? "UNC " : "", | |
eec7e1c1 | 2607 | res->feature & ATA_AMNF ? "AMNF " : "", |
1333e194 | 2608 | res->feature & ATA_IDNF ? "IDNF " : "", |
2dcb407e | 2609 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
6521148c | 2610 | #endif |
022bdb07 TH |
2611 | } |
2612 | } | |
2613 | ||
9b1e2658 TH |
2614 | /** |
2615 | * ata_eh_report - report error handling to user | |
2616 | * @ap: ATA port to report EH about | |
2617 | * | |
2618 | * Report EH to user. | |
2619 | * | |
2620 | * LOCKING: | |
2621 | * None. | |
2622 | */ | |
fb7fd614 | 2623 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2624 | { |
2625 | struct ata_link *link; | |
2626 | ||
1eca4365 | 2627 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2628 | ata_eh_link_report(link); |
2629 | } | |
2630 | ||
cc0680a5 | 2631 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2632 | unsigned int *classes, unsigned long deadline, |
2633 | bool clear_classes) | |
d87fa38e | 2634 | { |
f58229f8 | 2635 | struct ata_device *dev; |
d87fa38e | 2636 | |
b1c72916 | 2637 | if (clear_classes) |
1eca4365 | 2638 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2639 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2640 | |
f046519f | 2641 | return reset(link, classes, deadline); |
d87fa38e TH |
2642 | } |
2643 | ||
e8411fba | 2644 | static int ata_eh_followup_srst_needed(struct ata_link *link, int rc) |
664faf09 | 2645 | { |
45db2f6c | 2646 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2647 | return 0; |
5dbfc9cb TH |
2648 | if (rc == -EAGAIN) |
2649 | return 1; | |
071f44b1 | 2650 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2651 | return 1; |
664faf09 TH |
2652 | return 0; |
2653 | } | |
2654 | ||
fb7fd614 TH |
2655 | int ata_eh_reset(struct ata_link *link, int classify, |
2656 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2657 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2658 | { |
afaa5c37 | 2659 | struct ata_port *ap = link->ap; |
b1c72916 | 2660 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2661 | struct ata_eh_context *ehc = &link->eh_context; |
705d2014 | 2662 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
664faf09 | 2663 | unsigned int *classes = ehc->classes; |
416dc9ed | 2664 | unsigned int lflags = link->flags; |
1cdaf534 | 2665 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2666 | int max_tries = 0, try = 0; |
b1c72916 | 2667 | struct ata_link *failed_link; |
f58229f8 | 2668 | struct ata_device *dev; |
416dc9ed | 2669 | unsigned long deadline, now; |
022bdb07 | 2670 | ata_reset_fn_t reset; |
afaa5c37 | 2671 | unsigned long flags; |
416dc9ed | 2672 | u32 sstatus; |
b1c72916 | 2673 | int nr_unknown, rc; |
022bdb07 | 2674 | |
932648b0 TH |
2675 | /* |
2676 | * Prepare to reset | |
2677 | */ | |
d8af0eb6 TH |
2678 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2679 | max_tries++; | |
ca6d43b0 DW |
2680 | if (link->flags & ATA_LFLAG_RST_ONCE) |
2681 | max_tries = 1; | |
05944bdf TH |
2682 | if (link->flags & ATA_LFLAG_NO_HRST) |
2683 | hardreset = NULL; | |
2684 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2685 | softreset = NULL; | |
d8af0eb6 | 2686 | |
25985edc | 2687 | /* make sure each reset attempt is at least COOL_DOWN apart */ |
19b72321 TH |
2688 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
2689 | now = jiffies; | |
2690 | WARN_ON(time_after(ehc->last_reset, now)); | |
2691 | deadline = ata_deadline(ehc->last_reset, | |
2692 | ATA_EH_RESET_COOL_DOWN); | |
2693 | if (time_before(now, deadline)) | |
2694 | schedule_timeout_uninterruptible(deadline - now); | |
2695 | } | |
0a2c0f56 | 2696 | |
afaa5c37 TH |
2697 | spin_lock_irqsave(ap->lock, flags); |
2698 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2699 | spin_unlock_irqrestore(ap->lock, flags); | |
2700 | ||
cf480626 | 2701 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2702 | |
1eca4365 | 2703 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2704 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2705 | * may change configuration and be in PIO0 timing. If | |
2706 | * we do a hard reset (or are coming from power on) | |
2707 | * this is true for ATA or ATAPI. Until we've set a | |
2708 | * suitable controller mode we should not touch the | |
2709 | * bus as we may be talking too fast. | |
2710 | */ | |
2711 | dev->pio_mode = XFER_PIO_0; | |
5416912a | 2712 | dev->dma_mode = 0xff; |
cdeab114 TH |
2713 | |
2714 | /* If the controller has a pio mode setup function | |
2715 | * then use it to set the chipset to rights. Don't | |
2716 | * touch the DMA setup as that will be dealt with when | |
2717 | * configuring devices. | |
2718 | */ | |
2719 | if (ap->ops->set_piomode) | |
2720 | ap->ops->set_piomode(ap, dev); | |
2721 | } | |
2722 | ||
cf480626 | 2723 | /* prefer hardreset */ |
932648b0 | 2724 | reset = NULL; |
cf480626 TH |
2725 | ehc->i.action &= ~ATA_EH_RESET; |
2726 | if (hardreset) { | |
2727 | reset = hardreset; | |
a674050e | 2728 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2729 | } else if (softreset) { |
cf480626 | 2730 | reset = softreset; |
a674050e | 2731 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2732 | } |
f5914a46 TH |
2733 | |
2734 | if (prereset) { | |
b1c72916 TH |
2735 | unsigned long deadline = ata_deadline(jiffies, |
2736 | ATA_EH_PRERESET_TIMEOUT); | |
2737 | ||
2738 | if (slave) { | |
2739 | sehc->i.action &= ~ATA_EH_RESET; | |
2740 | sehc->i.action |= ehc->i.action; | |
2741 | } | |
2742 | ||
2743 | rc = prereset(link, deadline); | |
2744 | ||
2745 | /* If present, do prereset on slave link too. Reset | |
2746 | * is skipped iff both master and slave links report | |
2747 | * -ENOENT or clear ATA_EH_RESET. | |
2748 | */ | |
2749 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2750 | int tmp; | |
2751 | ||
2752 | tmp = prereset(slave, deadline); | |
2753 | if (tmp != -ENOENT) | |
2754 | rc = tmp; | |
2755 | ||
2756 | ehc->i.action |= sehc->i.action; | |
2757 | } | |
2758 | ||
f5914a46 | 2759 | if (rc) { |
c961922b | 2760 | if (rc == -ENOENT) { |
a9a79dfe | 2761 | ata_link_dbg(link, "port disabled--ignoring\n"); |
cf480626 | 2762 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2763 | |
1eca4365 | 2764 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2765 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2766 | |
2767 | rc = 0; | |
c961922b | 2768 | } else |
a9a79dfe JP |
2769 | ata_link_err(link, |
2770 | "prereset failed (errno=%d)\n", | |
2771 | rc); | |
fccb6ea5 | 2772 | goto out; |
f5914a46 | 2773 | } |
f5914a46 | 2774 | |
932648b0 | 2775 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2776 | * bang classes, thaw and return. |
932648b0 TH |
2777 | */ |
2778 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2779 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2780 | classes[dev->devno] = ATA_DEV_NONE; |
d6515e6f TH |
2781 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
2782 | ata_is_host_link(link)) | |
2783 | ata_eh_thaw_port(ap); | |
932648b0 TH |
2784 | rc = 0; |
2785 | goto out; | |
2786 | } | |
f5914a46 TH |
2787 | } |
2788 | ||
022bdb07 | 2789 | retry: |
932648b0 TH |
2790 | /* |
2791 | * Perform reset | |
2792 | */ | |
dc98c32c TH |
2793 | if (ata_is_host_link(link)) |
2794 | ata_eh_freeze_port(ap); | |
2795 | ||
341c2c95 | 2796 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2797 | |
932648b0 TH |
2798 | if (reset) { |
2799 | if (verbose) | |
a9a79dfe JP |
2800 | ata_link_info(link, "%s resetting link\n", |
2801 | reset == softreset ? "soft" : "hard"); | |
932648b0 TH |
2802 | |
2803 | /* mark that this EH session started with reset */ | |
19b72321 | 2804 | ehc->last_reset = jiffies; |
932648b0 TH |
2805 | if (reset == hardreset) |
2806 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2807 | else | |
2808 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2809 | |
b1c72916 TH |
2810 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2811 | if (rc && rc != -EAGAIN) { | |
2812 | failed_link = link; | |
5dbfc9cb | 2813 | goto fail; |
b1c72916 TH |
2814 | } |
2815 | ||
2816 | /* hardreset slave link if existent */ | |
2817 | if (slave && reset == hardreset) { | |
2818 | int tmp; | |
2819 | ||
2820 | if (verbose) | |
a9a79dfe | 2821 | ata_link_info(slave, "hard resetting link\n"); |
b1c72916 TH |
2822 | |
2823 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2824 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2825 | false); | |
2826 | switch (tmp) { | |
2827 | case -EAGAIN: | |
2828 | rc = -EAGAIN; | |
2829 | case 0: | |
2830 | break; | |
2831 | default: | |
2832 | failed_link = slave; | |
2833 | rc = tmp; | |
2834 | goto fail; | |
2835 | } | |
2836 | } | |
022bdb07 | 2837 | |
b1c72916 | 2838 | /* perform follow-up SRST if necessary */ |
932648b0 | 2839 | if (reset == hardreset && |
e8411fba | 2840 | ata_eh_followup_srst_needed(link, rc)) { |
932648b0 | 2841 | reset = softreset; |
022bdb07 | 2842 | |
932648b0 | 2843 | if (!reset) { |
a9a79dfe JP |
2844 | ata_link_err(link, |
2845 | "follow-up softreset required but no softreset available\n"); | |
b1c72916 | 2846 | failed_link = link; |
932648b0 TH |
2847 | rc = -EINVAL; |
2848 | goto fail; | |
2849 | } | |
664faf09 | 2850 | |
932648b0 | 2851 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2852 | rc = ata_do_reset(link, reset, classes, deadline, true); |
fe2c4d01 TH |
2853 | if (rc) { |
2854 | failed_link = link; | |
2855 | goto fail; | |
2856 | } | |
664faf09 | 2857 | } |
932648b0 TH |
2858 | } else { |
2859 | if (verbose) | |
a9a79dfe JP |
2860 | ata_link_info(link, |
2861 | "no reset method available, skipping reset\n"); | |
932648b0 TH |
2862 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) |
2863 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2864 | } |
2865 | ||
932648b0 TH |
2866 | /* |
2867 | * Post-reset processing | |
2868 | */ | |
1eca4365 | 2869 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2870 | /* After the reset, the device state is PIO 0 and the |
2871 | * controller state is undefined. Reset also wakes up | |
2872 | * drives from sleeping mode. | |
2873 | */ | |
2874 | dev->pio_mode = XFER_PIO_0; | |
2875 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2876 | |
3b761d3d TH |
2877 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
2878 | continue; | |
2879 | ||
2880 | /* apply class override */ | |
2881 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2882 | classes[dev->devno] = ATA_DEV_ATA; | |
2883 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2884 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
022bdb07 TH |
2885 | } |
2886 | ||
416dc9ed TH |
2887 | /* record current link speed */ |
2888 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2889 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2890 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2891 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2892 | |
dc98c32c TH |
2893 | /* thaw the port */ |
2894 | if (ata_is_host_link(link)) | |
2895 | ata_eh_thaw_port(ap); | |
2896 | ||
f046519f TH |
2897 | /* postreset() should clear hardware SError. Although SError |
2898 | * is cleared during link resume, clearing SError here is | |
2899 | * necessary as some PHYs raise hotplug events after SRST. | |
2900 | * This introduces race condition where hotplug occurs between | |
2901 | * reset and here. This race is mediated by cross checking | |
2902 | * link onlineness and classification result later. | |
2903 | */ | |
b1c72916 | 2904 | if (postreset) { |
416dc9ed | 2905 | postreset(link, classes); |
b1c72916 TH |
2906 | if (slave) |
2907 | postreset(slave, classes); | |
2908 | } | |
20952b69 | 2909 | |
1e641060 | 2910 | /* |
8c56cacc TH |
2911 | * Some controllers can't be frozen very well and may set spurious |
2912 | * error conditions during reset. Clear accumulated error | |
2913 | * information and re-thaw the port if frozen. As reset is the | |
2914 | * final recovery action and we cross check link onlineness against | |
2915 | * device classification later, no hotplug event is lost by this. | |
1e641060 | 2916 | */ |
f046519f | 2917 | spin_lock_irqsave(link->ap->lock, flags); |
1e641060 | 2918 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
b1c72916 | 2919 | if (slave) |
1e641060 TH |
2920 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
2921 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
f046519f TH |
2922 | spin_unlock_irqrestore(link->ap->lock, flags); |
2923 | ||
8c56cacc TH |
2924 | if (ap->pflags & ATA_PFLAG_FROZEN) |
2925 | ata_eh_thaw_port(ap); | |
2926 | ||
3b761d3d TH |
2927 | /* |
2928 | * Make sure onlineness and classification result correspond. | |
f046519f TH |
2929 | * Hotplug could have happened during reset and some |
2930 | * controllers fail to wait while a drive is spinning up after | |
2931 | * being hotplugged causing misdetection. By cross checking | |
3b761d3d TH |
2932 | * link on/offlineness and classification result, those |
2933 | * conditions can be reliably detected and retried. | |
f046519f | 2934 | */ |
b1c72916 | 2935 | nr_unknown = 0; |
1eca4365 | 2936 | ata_for_each_dev(dev, link, ALL) { |
3b761d3d TH |
2937 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
2938 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe | 2939 | ata_dev_dbg(dev, "link online but device misclassified\n"); |
3b761d3d | 2940 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2941 | nr_unknown++; |
3b761d3d TH |
2942 | } |
2943 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { | |
2944 | if (ata_class_enabled(classes[dev->devno])) | |
a9a79dfe JP |
2945 | ata_dev_dbg(dev, |
2946 | "link offline, clearing class %d to NONE\n", | |
2947 | classes[dev->devno]); | |
3b761d3d TH |
2948 | classes[dev->devno] = ATA_DEV_NONE; |
2949 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe JP |
2950 | ata_dev_dbg(dev, |
2951 | "link status unknown, clearing UNKNOWN to NONE\n"); | |
3b761d3d | 2952 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2953 | } |
f046519f TH |
2954 | } |
2955 | ||
b1c72916 | 2956 | if (classify && nr_unknown) { |
f046519f | 2957 | if (try < max_tries) { |
a9a79dfe JP |
2958 | ata_link_warn(link, |
2959 | "link online but %d devices misclassified, retrying\n", | |
2960 | nr_unknown); | |
b1c72916 | 2961 | failed_link = link; |
f046519f TH |
2962 | rc = -EAGAIN; |
2963 | goto fail; | |
2964 | } | |
a9a79dfe JP |
2965 | ata_link_warn(link, |
2966 | "link online but %d devices misclassified, " | |
2967 | "device detection might fail\n", nr_unknown); | |
f046519f TH |
2968 | } |
2969 | ||
416dc9ed | 2970 | /* reset successful, schedule revalidation */ |
cf480626 | 2971 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2972 | if (slave) |
2973 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
6b7ae954 | 2974 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2975 | ehc->i.action |= ATA_EH_REVALIDATE; |
6b7ae954 | 2976 | link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */ |
ae791c05 | 2977 | |
416dc9ed | 2978 | rc = 0; |
fccb6ea5 TH |
2979 | out: |
2980 | /* clear hotplug flag */ | |
2981 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2982 | if (slave) |
2983 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2984 | |
2985 | spin_lock_irqsave(ap->lock, flags); | |
2986 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2987 | spin_unlock_irqrestore(ap->lock, flags); | |
2988 | ||
022bdb07 | 2989 | return rc; |
416dc9ed TH |
2990 | |
2991 | fail: | |
5958e302 TH |
2992 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2993 | if (!ata_is_host_link(link) && | |
2994 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2995 | rc = -ERESTART; | |
2996 | ||
7a46c078 | 2997 | if (try >= max_tries) { |
8ea7645c TH |
2998 | /* |
2999 | * Thaw host port even if reset failed, so that the port | |
3000 | * can be retried on the next phy event. This risks | |
3001 | * repeated EH runs but seems to be a better tradeoff than | |
3002 | * shutting down a port after a botched hotplug attempt. | |
3003 | */ | |
3004 | if (ata_is_host_link(link)) | |
3005 | ata_eh_thaw_port(ap); | |
416dc9ed | 3006 | goto out; |
8ea7645c | 3007 | } |
416dc9ed TH |
3008 | |
3009 | now = jiffies; | |
3010 | if (time_before(now, deadline)) { | |
3011 | unsigned long delta = deadline - now; | |
3012 | ||
a9a79dfe | 3013 | ata_link_warn(failed_link, |
0a2c0f56 TH |
3014 | "reset failed (errno=%d), retrying in %u secs\n", |
3015 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed | 3016 | |
c0c362b6 | 3017 | ata_eh_release(ap); |
416dc9ed TH |
3018 | while (delta) |
3019 | delta = schedule_timeout_uninterruptible(delta); | |
c0c362b6 | 3020 | ata_eh_acquire(ap); |
416dc9ed TH |
3021 | } |
3022 | ||
7a46c078 GG |
3023 | /* |
3024 | * While disks spinup behind PMP, some controllers fail sending SRST. | |
3025 | * They need to be reset - as well as the PMP - before retrying. | |
3026 | */ | |
3027 | if (rc == -ERESTART) { | |
3028 | if (ata_is_host_link(link)) | |
3029 | ata_eh_thaw_port(ap); | |
3030 | goto out; | |
3031 | } | |
3032 | ||
b1c72916 | 3033 | if (try == max_tries - 1) { |
a07d499b | 3034 | sata_down_spd_limit(link, 0); |
b1c72916 | 3035 | if (slave) |
a07d499b | 3036 | sata_down_spd_limit(slave, 0); |
b1c72916 | 3037 | } else if (rc == -EPIPE) |
a07d499b | 3038 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 3039 | |
416dc9ed TH |
3040 | if (hardreset) |
3041 | reset = hardreset; | |
3042 | goto retry; | |
022bdb07 TH |
3043 | } |
3044 | ||
45fabbb7 EO |
3045 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
3046 | { | |
3047 | struct ata_link *link; | |
3048 | struct ata_device *dev; | |
3049 | unsigned long flags; | |
3050 | ||
3051 | /* | |
3052 | * This function can be thought of as an extended version of | |
3053 | * ata_eh_about_to_do() specially crafted to accommodate the | |
3054 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
3055 | * does not leave the do {} while () loop in ata_eh_recover as | |
3056 | * long as the timeout for a park request to *one* device on | |
3057 | * the port has not expired, and since we still want to pick | |
3058 | * up park requests to other devices on the same port or | |
3059 | * timeout updates for the same device, we have to pull | |
3060 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
3061 | * ourselves at the beginning of each pass over the loop. | |
3062 | * | |
3063 | * Additionally, all write accesses to &ap->park_req_pending | |
16735d02 | 3064 | * through reinit_completion() (see below) or complete_all() |
45fabbb7 EO |
3065 | * (see ata_scsi_park_store()) are protected by the host lock. |
3066 | * As a result we have that park_req_pending.done is zero on | |
3067 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
3068 | * *all* devices on port ap have been pulled into the | |
3069 | * respective eh_context structs. If, and only if, | |
3070 | * park_req_pending.done is non-zero by the time we reach | |
3071 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
3072 | * has been scheduled for at least one of the devices on port | |
3073 | * ap and we have to cycle over the do {} while () loop in | |
3074 | * ata_eh_recover() again. | |
3075 | */ | |
3076 | ||
3077 | spin_lock_irqsave(ap->lock, flags); | |
16735d02 | 3078 | reinit_completion(&ap->park_req_pending); |
1eca4365 TH |
3079 | ata_for_each_link(link, ap, EDGE) { |
3080 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3081 | struct ata_eh_info *ehi = &link->eh_info; |
3082 | ||
3083 | link->eh_context.i.dev_action[dev->devno] |= | |
3084 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
3085 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
3086 | } | |
3087 | } | |
3088 | spin_unlock_irqrestore(ap->lock, flags); | |
3089 | } | |
3090 | ||
3091 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
3092 | { | |
3093 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
3094 | struct ata_taskfile tf; | |
3095 | unsigned int err_mask; | |
3096 | ||
3097 | ata_tf_init(dev, &tf); | |
3098 | if (park) { | |
3099 | ehc->unloaded_mask |= 1 << dev->devno; | |
3100 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
3101 | tf.feature = 0x44; | |
3102 | tf.lbal = 0x4c; | |
3103 | tf.lbam = 0x4e; | |
3104 | tf.lbah = 0x55; | |
3105 | } else { | |
3106 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
3107 | tf.command = ATA_CMD_CHK_POWER; | |
3108 | } | |
3109 | ||
3110 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
bd18bc04 | 3111 | tf.protocol = ATA_PROT_NODATA; |
45fabbb7 EO |
3112 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
3113 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
a9a79dfe | 3114 | ata_dev_err(dev, "head unload failed!\n"); |
45fabbb7 EO |
3115 | ehc->unloaded_mask &= ~(1 << dev->devno); |
3116 | } | |
3117 | } | |
3118 | ||
0260731f | 3119 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 3120 | struct ata_device **r_failed_dev) |
022bdb07 | 3121 | { |
0260731f TH |
3122 | struct ata_port *ap = link->ap; |
3123 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 3124 | struct ata_device *dev; |
8c3c52a8 | 3125 | unsigned int new_mask = 0; |
084fe639 | 3126 | unsigned long flags; |
f58229f8 | 3127 | int rc = 0; |
022bdb07 TH |
3128 | |
3129 | DPRINTK("ENTER\n"); | |
3130 | ||
8c3c52a8 TH |
3131 | /* For PATA drive side cable detection to work, IDENTIFY must |
3132 | * be done backwards such that PDIAG- is released by the slave | |
3133 | * device before the master device is identified. | |
3134 | */ | |
1eca4365 | 3135 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
3136 | unsigned int action = ata_eh_dev_action(dev); |
3137 | unsigned int readid_flags = 0; | |
022bdb07 | 3138 | |
bff04647 TH |
3139 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
3140 | readid_flags |= ATA_READID_POSTRESET; | |
3141 | ||
9666f400 | 3142 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
3143 | WARN_ON(dev->class == ATA_DEV_PMP); |
3144 | ||
b1c72916 | 3145 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 3146 | rc = -EIO; |
8c3c52a8 | 3147 | goto err; |
022bdb07 TH |
3148 | } |
3149 | ||
0260731f | 3150 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
3151 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
3152 | readid_flags); | |
022bdb07 | 3153 | if (rc) |
8c3c52a8 | 3154 | goto err; |
022bdb07 | 3155 | |
0260731f | 3156 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 3157 | |
baa1e78a TH |
3158 | /* Configuration may have changed, reconfigure |
3159 | * transfer mode. | |
3160 | */ | |
3161 | ehc->i.flags |= ATA_EHI_SETMODE; | |
3162 | ||
3057ac3c | 3163 | /* schedule the scsi_rescan_device() here */ |
ad72cf98 | 3164 | schedule_work(&(ap->scsi_rescan_task)); |
084fe639 TH |
3165 | } else if (dev->class == ATA_DEV_UNKNOWN && |
3166 | ehc->tries[dev->devno] && | |
3167 | ata_class_enabled(ehc->classes[dev->devno])) { | |
842faa6c TH |
3168 | /* Temporarily set dev->class, it will be |
3169 | * permanently set once all configurations are | |
3170 | * complete. This is necessary because new | |
3171 | * device configuration is done in two | |
3172 | * separate loops. | |
3173 | */ | |
084fe639 TH |
3174 | dev->class = ehc->classes[dev->devno]; |
3175 | ||
633273a3 TH |
3176 | if (dev->class == ATA_DEV_PMP) |
3177 | rc = sata_pmp_attach(dev); | |
3178 | else | |
3179 | rc = ata_dev_read_id(dev, &dev->class, | |
3180 | readid_flags, dev->id); | |
842faa6c TH |
3181 | |
3182 | /* read_id might have changed class, store and reset */ | |
3183 | ehc->classes[dev->devno] = dev->class; | |
3184 | dev->class = ATA_DEV_UNKNOWN; | |
3185 | ||
8c3c52a8 TH |
3186 | switch (rc) { |
3187 | case 0: | |
99cf610a TH |
3188 | /* clear error info accumulated during probe */ |
3189 | ata_ering_clear(&dev->ering); | |
f58229f8 | 3190 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
3191 | break; |
3192 | case -ENOENT: | |
55a8e2c8 TH |
3193 | /* IDENTIFY was issued to non-existent |
3194 | * device. No need to reset. Just | |
842faa6c | 3195 | * thaw and ignore the device. |
55a8e2c8 TH |
3196 | */ |
3197 | ata_eh_thaw_port(ap); | |
084fe639 | 3198 | break; |
8c3c52a8 | 3199 | default: |
8c3c52a8 | 3200 | goto err; |
084fe639 | 3201 | } |
8c3c52a8 TH |
3202 | } |
3203 | } | |
084fe639 | 3204 | |
c1c4e8d5 | 3205 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
3206 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
3207 | if (ap->ops->cable_detect) | |
3208 | ap->cbl = ap->ops->cable_detect(ap); | |
3209 | ata_force_cbl(ap); | |
3210 | } | |
c1c4e8d5 | 3211 | |
8c3c52a8 TH |
3212 | /* Configure new devices forward such that user doesn't see |
3213 | * device detection messages backwards. | |
3214 | */ | |
1eca4365 | 3215 | ata_for_each_dev(dev, link, ALL) { |
4f7c2874 | 3216 | if (!(new_mask & (1 << dev->devno))) |
8c3c52a8 TH |
3217 | continue; |
3218 | ||
842faa6c TH |
3219 | dev->class = ehc->classes[dev->devno]; |
3220 | ||
4f7c2874 TH |
3221 | if (dev->class == ATA_DEV_PMP) |
3222 | continue; | |
3223 | ||
8c3c52a8 TH |
3224 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
3225 | rc = ata_dev_configure(dev); | |
3226 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
842faa6c TH |
3227 | if (rc) { |
3228 | dev->class = ATA_DEV_UNKNOWN; | |
8c3c52a8 | 3229 | goto err; |
842faa6c | 3230 | } |
8c3c52a8 TH |
3231 | |
3232 | spin_lock_irqsave(ap->lock, flags); | |
3233 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
3234 | spin_unlock_irqrestore(ap->lock, flags); | |
3235 | ||
3236 | /* new device discovered, configure xfermode */ | |
3237 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
3238 | } |
3239 | ||
8c3c52a8 | 3240 | return 0; |
022bdb07 | 3241 | |
8c3c52a8 TH |
3242 | err: |
3243 | *r_failed_dev = dev; | |
3244 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
3245 | return rc; |
3246 | } | |
3247 | ||
6f1d1e3a TH |
3248 | /** |
3249 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
3250 | * @link: link on which timings will be programmed | |
98a1708d | 3251 | * @r_failed_dev: out parameter for failed device |
6f1d1e3a TH |
3252 | * |
3253 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3254 | * ata_set_mode() fails, pointer to the failing device is | |
3255 | * returned in @r_failed_dev. | |
3256 | * | |
3257 | * LOCKING: | |
3258 | * PCI/etc. bus probe sem. | |
3259 | * | |
3260 | * RETURNS: | |
3261 | * 0 on success, negative errno otherwise | |
3262 | */ | |
3263 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
3264 | { | |
3265 | struct ata_port *ap = link->ap; | |
00115e0f TH |
3266 | struct ata_device *dev; |
3267 | int rc; | |
6f1d1e3a | 3268 | |
76326ac1 | 3269 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 3270 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
3271 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
3272 | struct ata_ering_entry *ent; | |
3273 | ||
3274 | ent = ata_ering_top(&dev->ering); | |
3275 | if (ent) | |
3276 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
3277 | } | |
3278 | } | |
3279 | ||
6f1d1e3a TH |
3280 | /* has private set_mode? */ |
3281 | if (ap->ops->set_mode) | |
00115e0f TH |
3282 | rc = ap->ops->set_mode(link, r_failed_dev); |
3283 | else | |
3284 | rc = ata_do_set_mode(link, r_failed_dev); | |
3285 | ||
3286 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 3287 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
3288 | struct ata_eh_context *ehc = &link->eh_context; |
3289 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
3290 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
3291 | ||
3292 | if (dev->xfer_mode != saved_xfer_mode || | |
3293 | ata_ncq_enabled(dev) != saved_ncq) | |
3294 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
3295 | } | |
3296 | ||
3297 | return rc; | |
6f1d1e3a TH |
3298 | } |
3299 | ||
11fc33da TH |
3300 | /** |
3301 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
3302 | * @dev: ATAPI device to clear UA for | |
3303 | * | |
3304 | * Resets and other operations can make an ATAPI device raise | |
3305 | * UNIT ATTENTION which causes the next operation to fail. This | |
3306 | * function clears UA. | |
3307 | * | |
3308 | * LOCKING: | |
3309 | * EH context (may sleep). | |
3310 | * | |
3311 | * RETURNS: | |
3312 | * 0 on success, -errno on failure. | |
3313 | */ | |
3314 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
3315 | { | |
3316 | int i; | |
3317 | ||
3318 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 3319 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
3320 | u8 sense_key = 0; |
3321 | unsigned int err_mask; | |
3322 | ||
3323 | err_mask = atapi_eh_tur(dev, &sense_key); | |
3324 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3325 | ata_dev_warn(dev, |
3326 | "TEST_UNIT_READY failed (err_mask=0x%x)\n", | |
3327 | err_mask); | |
11fc33da TH |
3328 | return -EIO; |
3329 | } | |
3330 | ||
3331 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
3332 | return 0; | |
3333 | ||
3334 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
3335 | if (err_mask) { | |
a9a79dfe | 3336 | ata_dev_warn(dev, "failed to clear " |
11fc33da TH |
3337 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); |
3338 | return -EIO; | |
3339 | } | |
3340 | } | |
3341 | ||
a9a79dfe JP |
3342 | ata_dev_warn(dev, "UNIT ATTENTION persists after %d tries\n", |
3343 | ATA_EH_UA_TRIES); | |
11fc33da TH |
3344 | |
3345 | return 0; | |
3346 | } | |
3347 | ||
6013efd8 TH |
3348 | /** |
3349 | * ata_eh_maybe_retry_flush - Retry FLUSH if necessary | |
3350 | * @dev: ATA device which may need FLUSH retry | |
3351 | * | |
3352 | * If @dev failed FLUSH, it needs to be reported upper layer | |
3353 | * immediately as it means that @dev failed to remap and already | |
3354 | * lost at least a sector and further FLUSH retrials won't make | |
3355 | * any difference to the lost sector. However, if FLUSH failed | |
3356 | * for other reasons, for example transmission error, FLUSH needs | |
3357 | * to be retried. | |
3358 | * | |
3359 | * This function determines whether FLUSH failure retry is | |
3360 | * necessary and performs it if so. | |
3361 | * | |
3362 | * RETURNS: | |
3363 | * 0 if EH can continue, -errno if EH needs to be repeated. | |
3364 | */ | |
3365 | static int ata_eh_maybe_retry_flush(struct ata_device *dev) | |
3366 | { | |
3367 | struct ata_link *link = dev->link; | |
3368 | struct ata_port *ap = link->ap; | |
3369 | struct ata_queued_cmd *qc; | |
3370 | struct ata_taskfile tf; | |
3371 | unsigned int err_mask; | |
3372 | int rc = 0; | |
3373 | ||
3374 | /* did flush fail for this device? */ | |
3375 | if (!ata_tag_valid(link->active_tag)) | |
3376 | return 0; | |
3377 | ||
3378 | qc = __ata_qc_from_tag(ap, link->active_tag); | |
3379 | if (qc->dev != dev || (qc->tf.command != ATA_CMD_FLUSH_EXT && | |
3380 | qc->tf.command != ATA_CMD_FLUSH)) | |
3381 | return 0; | |
3382 | ||
3383 | /* if the device failed it, it should be reported to upper layers */ | |
3384 | if (qc->err_mask & AC_ERR_DEV) | |
3385 | return 0; | |
3386 | ||
3387 | /* flush failed for some other reason, give it another shot */ | |
3388 | ata_tf_init(dev, &tf); | |
3389 | ||
3390 | tf.command = qc->tf.command; | |
3391 | tf.flags |= ATA_TFLAG_DEVICE; | |
3392 | tf.protocol = ATA_PROT_NODATA; | |
3393 | ||
a9a79dfe | 3394 | ata_dev_warn(dev, "retrying FLUSH 0x%x Emask 0x%x\n", |
6013efd8 TH |
3395 | tf.command, qc->err_mask); |
3396 | ||
3397 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
3398 | if (!err_mask) { | |
3399 | /* | |
3400 | * FLUSH is complete but there's no way to | |
3401 | * successfully complete a failed command from EH. | |
3402 | * Making sure retry is allowed at least once and | |
3403 | * retrying it should do the trick - whatever was in | |
3404 | * the cache is already on the platter and this won't | |
3405 | * cause infinite loop. | |
3406 | */ | |
3407 | qc->scsicmd->allowed = max(qc->scsicmd->allowed, 1); | |
3408 | } else { | |
a9a79dfe | 3409 | ata_dev_warn(dev, "FLUSH failed Emask 0x%x\n", |
6013efd8 TH |
3410 | err_mask); |
3411 | rc = -EIO; | |
3412 | ||
3413 | /* if device failed it, report it to upper layers */ | |
3414 | if (err_mask & AC_ERR_DEV) { | |
3415 | qc->err_mask |= AC_ERR_DEV; | |
3416 | qc->result_tf = tf; | |
3417 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
3418 | rc = 0; | |
3419 | } | |
3420 | } | |
3421 | return rc; | |
3422 | } | |
3423 | ||
6b7ae954 TH |
3424 | /** |
3425 | * ata_eh_set_lpm - configure SATA interface power management | |
3426 | * @link: link to configure power management | |
3427 | * @policy: the link power management policy | |
3428 | * @r_failed_dev: out parameter for failed device | |
3429 | * | |
3430 | * Enable SATA Interface power management. This will enable | |
f4ac6476 HG |
3431 | * Device Interface Power Management (DIPM) for min_power and |
3432 | * medium_power_with_dipm policies, and then call driver specific | |
3433 | * callbacks for enabling Host Initiated Power management. | |
6b7ae954 TH |
3434 | * |
3435 | * LOCKING: | |
3436 | * EH context. | |
3437 | * | |
3438 | * RETURNS: | |
3439 | * 0 on success, -errno on failure. | |
3440 | */ | |
3441 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
3442 | struct ata_device **r_failed_dev) | |
3443 | { | |
6c8ea89c | 3444 | struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL; |
6b7ae954 TH |
3445 | struct ata_eh_context *ehc = &link->eh_context; |
3446 | struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; | |
e5005b15 | 3447 | enum ata_lpm_policy old_policy = link->lpm_policy; |
5f6f12cc | 3448 | bool no_dipm = link->ap->flags & ATA_FLAG_NO_DIPM; |
6b7ae954 TH |
3449 | unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; |
3450 | unsigned int err_mask; | |
3451 | int rc; | |
3452 | ||
3453 | /* if the link or host doesn't do LPM, noop */ | |
3454 | if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) | |
3455 | return 0; | |
3456 | ||
3457 | /* | |
3458 | * DIPM is enabled only for MIN_POWER as some devices | |
3459 | * misbehave when the host NACKs transition to SLUMBER. Order | |
3460 | * device and link configurations such that the host always | |
3461 | * allows DIPM requests. | |
3462 | */ | |
3463 | ata_for_each_dev(dev, link, ENABLED) { | |
3464 | bool hipm = ata_id_has_hipm(dev->id); | |
ae01b249 | 3465 | bool dipm = ata_id_has_dipm(dev->id) && !no_dipm; |
6b7ae954 TH |
3466 | |
3467 | /* find the first enabled and LPM enabled devices */ | |
3468 | if (!link_dev) | |
3469 | link_dev = dev; | |
3470 | ||
3471 | if (!lpm_dev && (hipm || dipm)) | |
3472 | lpm_dev = dev; | |
3473 | ||
3474 | hints &= ~ATA_LPM_EMPTY; | |
3475 | if (!hipm) | |
3476 | hints &= ~ATA_LPM_HIPM; | |
3477 | ||
3478 | /* disable DIPM before changing link config */ | |
f4ac6476 | 3479 | if (policy < ATA_LPM_MED_POWER_WITH_DIPM && dipm) { |
6b7ae954 TH |
3480 | err_mask = ata_dev_set_feature(dev, |
3481 | SETFEATURES_SATA_DISABLE, SATA_DIPM); | |
3482 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3483 | ata_dev_warn(dev, |
3484 | "failed to disable DIPM, Emask 0x%x\n", | |
3485 | err_mask); | |
6b7ae954 TH |
3486 | rc = -EIO; |
3487 | goto fail; | |
3488 | } | |
3489 | } | |
3490 | } | |
3491 | ||
6c8ea89c TH |
3492 | if (ap) { |
3493 | rc = ap->ops->set_lpm(link, policy, hints); | |
3494 | if (!rc && ap->slave_link) | |
3495 | rc = ap->ops->set_lpm(ap->slave_link, policy, hints); | |
3496 | } else | |
3497 | rc = sata_pmp_set_lpm(link, policy, hints); | |
6b7ae954 TH |
3498 | |
3499 | /* | |
3500 | * Attribute link config failure to the first (LPM) enabled | |
3501 | * device on the link. | |
3502 | */ | |
3503 | if (rc) { | |
3504 | if (rc == -EOPNOTSUPP) { | |
3505 | link->flags |= ATA_LFLAG_NO_LPM; | |
3506 | return 0; | |
3507 | } | |
3508 | dev = lpm_dev ? lpm_dev : link_dev; | |
3509 | goto fail; | |
3510 | } | |
3511 | ||
e5005b15 TH |
3512 | /* |
3513 | * Low level driver acked the transition. Issue DIPM command | |
3514 | * with the new policy set. | |
3515 | */ | |
3516 | link->lpm_policy = policy; | |
3517 | if (ap && ap->slave_link) | |
3518 | ap->slave_link->lpm_policy = policy; | |
3519 | ||
6b7ae954 TH |
3520 | /* host config updated, enable DIPM if transitioning to MIN_POWER */ |
3521 | ata_for_each_dev(dev, link, ENABLED) { | |
f4ac6476 | 3522 | if (policy >= ATA_LPM_MED_POWER_WITH_DIPM && !no_dipm && |
ae01b249 | 3523 | ata_id_has_dipm(dev->id)) { |
6b7ae954 TH |
3524 | err_mask = ata_dev_set_feature(dev, |
3525 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
3526 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe | 3527 | ata_dev_warn(dev, |
6b7ae954 TH |
3528 | "failed to enable DIPM, Emask 0x%x\n", |
3529 | err_mask); | |
3530 | rc = -EIO; | |
3531 | goto fail; | |
3532 | } | |
3533 | } | |
3534 | } | |
3535 | ||
09c5b480 GM |
3536 | link->last_lpm_change = jiffies; |
3537 | link->flags |= ATA_LFLAG_CHANGED; | |
3538 | ||
6b7ae954 TH |
3539 | return 0; |
3540 | ||
3541 | fail: | |
e5005b15 TH |
3542 | /* restore the old policy */ |
3543 | link->lpm_policy = old_policy; | |
3544 | if (ap && ap->slave_link) | |
3545 | ap->slave_link->lpm_policy = old_policy; | |
3546 | ||
6b7ae954 TH |
3547 | /* if no device or only one more chance is left, disable LPM */ |
3548 | if (!dev || ehc->tries[dev->devno] <= 2) { | |
a9a79dfe | 3549 | ata_link_warn(link, "disabling LPM on the link\n"); |
6b7ae954 TH |
3550 | link->flags |= ATA_LFLAG_NO_LPM; |
3551 | } | |
3552 | if (r_failed_dev) | |
3553 | *r_failed_dev = dev; | |
3554 | return rc; | |
3555 | } | |
3556 | ||
8a745f1f | 3557 | int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 3558 | { |
f58229f8 TH |
3559 | struct ata_device *dev; |
3560 | int cnt = 0; | |
022bdb07 | 3561 | |
1eca4365 TH |
3562 | ata_for_each_dev(dev, link, ENABLED) |
3563 | cnt++; | |
022bdb07 TH |
3564 | return cnt; |
3565 | } | |
3566 | ||
0260731f | 3567 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 3568 | { |
f58229f8 TH |
3569 | struct ata_device *dev; |
3570 | int cnt = 0; | |
084fe639 | 3571 | |
1eca4365 | 3572 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 3573 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
3574 | cnt++; |
3575 | return cnt; | |
3576 | } | |
3577 | ||
0260731f | 3578 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 3579 | { |
672b2d65 | 3580 | struct ata_port *ap = link->ap; |
0260731f | 3581 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 3582 | struct ata_device *dev; |
084fe639 | 3583 | |
f9df58cb TH |
3584 | /* skip disabled links */ |
3585 | if (link->flags & ATA_LFLAG_DISABLED) | |
3586 | return 1; | |
3587 | ||
e2f3d75f TH |
3588 | /* skip if explicitly requested */ |
3589 | if (ehc->i.flags & ATA_EHI_NO_RECOVERY) | |
3590 | return 1; | |
3591 | ||
672b2d65 TH |
3592 | /* thaw frozen port and recover failed devices */ |
3593 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
3594 | return 0; | |
3595 | ||
3596 | /* reset at least once if reset is requested */ | |
3597 | if ((ehc->i.action & ATA_EH_RESET) && | |
3598 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
3599 | return 0; |
3600 | ||
3601 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 3602 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
3603 | if (dev->class == ATA_DEV_UNKNOWN && |
3604 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
3605 | return 0; | |
3606 | } | |
3607 | ||
3608 | return 1; | |
3609 | } | |
3610 | ||
c2c7a89c TH |
3611 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
3612 | { | |
3613 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
3614 | u64 now = get_jiffies_64(); | |
3615 | int *trials = void_arg; | |
3616 | ||
6868225e LM |
3617 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || |
3618 | (ent->timestamp < now - min(now, interval))) | |
c2c7a89c TH |
3619 | return -1; |
3620 | ||
3621 | (*trials)++; | |
3622 | return 0; | |
3623 | } | |
3624 | ||
02c05a27 TH |
3625 | static int ata_eh_schedule_probe(struct ata_device *dev) |
3626 | { | |
3627 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3628 | struct ata_link *link = ata_dev_phys_link(dev); |
3629 | int trials = 0; | |
02c05a27 TH |
3630 | |
3631 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3632 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3633 | return 0; | |
3634 | ||
3635 | ata_eh_detach_dev(dev); | |
3636 | ata_dev_init(dev); | |
3637 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3638 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3639 | ehc->saved_xfer_mode[dev->devno] = 0; |
3640 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3641 | |
6b7ae954 | 3642 | /* the link maybe in a deep sleep, wake it up */ |
6c8ea89c TH |
3643 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { |
3644 | if (ata_is_host_link(link)) | |
3645 | link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER, | |
3646 | ATA_LPM_EMPTY); | |
3647 | else | |
3648 | sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER, | |
3649 | ATA_LPM_EMPTY); | |
3650 | } | |
6b7ae954 | 3651 | |
c2c7a89c TH |
3652 | /* Record and count probe trials on the ering. The specific |
3653 | * error mask used is irrelevant. Because a successful device | |
3654 | * detection clears the ering, this count accumulates only if | |
3655 | * there are consecutive failed probes. | |
3656 | * | |
3657 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3658 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3659 | * forced to 1.5Gbps. | |
3660 | * | |
3661 | * This is to work around cases where failed link speed | |
3662 | * negotiation results in device misdetection leading to | |
3663 | * infinite DEVXCHG or PHRDY CHG events. | |
3664 | */ | |
3665 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3666 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3667 | ||
3668 | if (trials > ATA_EH_PROBE_TRIALS) | |
3669 | sata_down_spd_limit(link, 1); | |
3670 | ||
02c05a27 TH |
3671 | return 1; |
3672 | } | |
3673 | ||
9b1e2658 | 3674 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3675 | { |
9af5c9c9 | 3676 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3677 | |
cf9a590a TH |
3678 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3679 | * The requester is responsible for ensuring forward progress. | |
3680 | */ | |
3681 | if (err != -EAGAIN) | |
3682 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3683 | |
3684 | switch (err) { | |
3685 | case -ENODEV: | |
3686 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3687 | ehc->i.probe_mask |= (1 << dev->devno); | |
05b83605 | 3688 | /* fall through */ |
fee7ca72 TH |
3689 | case -EINVAL: |
3690 | /* give it just one more chance */ | |
3691 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
05b83605 | 3692 | /* fall through */ |
fee7ca72 | 3693 | case -EIO: |
d89293ab | 3694 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3695 | /* This is the last chance, better to slow |
3696 | * down than lose it. | |
3697 | */ | |
a07d499b | 3698 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3699 | if (dev->pio_mode > XFER_PIO_0) |
3700 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3701 | } |
3702 | } | |
3703 | ||
3704 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3705 | /* disable device if it has used up all its chances */ | |
3706 | ata_dev_disable(dev); | |
3707 | ||
3708 | /* detach if offline */ | |
b1c72916 | 3709 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3710 | ata_eh_detach_dev(dev); |
3711 | ||
02c05a27 | 3712 | /* schedule probe if necessary */ |
87fbc5a0 | 3713 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3714 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3715 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3716 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3717 | } | |
9b1e2658 TH |
3718 | |
3719 | return 1; | |
fee7ca72 | 3720 | } else { |
cf480626 | 3721 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3722 | return 0; |
fee7ca72 TH |
3723 | } |
3724 | } | |
3725 | ||
022bdb07 TH |
3726 | /** |
3727 | * ata_eh_recover - recover host port after error | |
3728 | * @ap: host port to recover | |
f5914a46 | 3729 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3730 | * @softreset: softreset method (can be NULL) |
3731 | * @hardreset: hardreset method (can be NULL) | |
3732 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3733 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3734 | * |
3735 | * This is the alpha and omega, eum and yang, heart and soul of | |
3736 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3737 | * recover each link and hotplug requests are recorded in the |
3738 | * link's eh_context. This function executes all the operations | |
3739 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3740 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3741 | * |
3742 | * LOCKING: | |
3743 | * Kernel thread context (may sleep). | |
3744 | * | |
3745 | * RETURNS: | |
3746 | * 0 on success, -errno on failure. | |
3747 | */ | |
fb7fd614 TH |
3748 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3749 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3750 | ata_postreset_fn_t postreset, | |
3751 | struct ata_link **r_failed_link) | |
022bdb07 | 3752 | { |
9b1e2658 | 3753 | struct ata_link *link; |
022bdb07 | 3754 | struct ata_device *dev; |
6b7ae954 | 3755 | int rc, nr_fails; |
45fabbb7 | 3756 | unsigned long flags, deadline; |
022bdb07 TH |
3757 | |
3758 | DPRINTK("ENTER\n"); | |
3759 | ||
3760 | /* prep for recovery */ | |
1eca4365 | 3761 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3762 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3763 | |
f9df58cb TH |
3764 | /* re-enable link? */ |
3765 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3766 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3767 | spin_lock_irqsave(ap->lock, flags); | |
3768 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3769 | spin_unlock_irqrestore(ap->lock, flags); | |
3770 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3771 | } | |
3772 | ||
1eca4365 | 3773 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3774 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3775 | ehc->tries[dev->devno] = 1; | |
3776 | else | |
3777 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3778 | |
9b1e2658 TH |
3779 | /* collect port action mask recorded in dev actions */ |
3780 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3781 | ~ATA_EH_PERDEV_MASK; | |
3782 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3783 | ||
3784 | /* process hotplug request */ | |
3785 | if (dev->flags & ATA_DFLAG_DETACH) | |
3786 | ata_eh_detach_dev(dev); | |
3787 | ||
02c05a27 TH |
3788 | /* schedule probe if necessary */ |
3789 | if (!ata_dev_enabled(dev)) | |
3790 | ata_eh_schedule_probe(dev); | |
084fe639 | 3791 | } |
022bdb07 TH |
3792 | } |
3793 | ||
3794 | retry: | |
022bdb07 TH |
3795 | rc = 0; |
3796 | ||
aeb2ecd6 | 3797 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3798 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3799 | goto out; |
3800 | ||
9b1e2658 | 3801 | /* prep for EH */ |
1eca4365 | 3802 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3803 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3804 | |
9b1e2658 TH |
3805 | /* skip EH if possible. */ |
3806 | if (ata_eh_skip_recovery(link)) | |
3807 | ehc->i.action = 0; | |
3808 | ||
1eca4365 | 3809 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3810 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3811 | } | |
084fe639 | 3812 | |
022bdb07 | 3813 | /* reset */ |
1eca4365 | 3814 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3815 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3816 | |
dc98c32c TH |
3817 | if (!(ehc->i.action & ATA_EH_RESET)) |
3818 | continue; | |
9b1e2658 | 3819 | |
dc98c32c TH |
3820 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3821 | prereset, softreset, hardreset, postreset); | |
3822 | if (rc) { | |
a9a79dfe | 3823 | ata_link_err(link, "reset failed, giving up\n"); |
dc98c32c | 3824 | goto out; |
022bdb07 | 3825 | } |
022bdb07 TH |
3826 | } |
3827 | ||
45fabbb7 EO |
3828 | do { |
3829 | unsigned long now; | |
3830 | ||
3831 | /* | |
3832 | * clears ATA_EH_PARK in eh_info and resets | |
3833 | * ap->park_req_pending | |
3834 | */ | |
3835 | ata_eh_pull_park_action(ap); | |
3836 | ||
3837 | deadline = jiffies; | |
1eca4365 TH |
3838 | ata_for_each_link(link, ap, EDGE) { |
3839 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3840 | struct ata_eh_context *ehc = &link->eh_context; |
3841 | unsigned long tmp; | |
3842 | ||
9162c657 HR |
3843 | if (dev->class != ATA_DEV_ATA && |
3844 | dev->class != ATA_DEV_ZAC) | |
45fabbb7 EO |
3845 | continue; |
3846 | if (!(ehc->i.dev_action[dev->devno] & | |
3847 | ATA_EH_PARK)) | |
3848 | continue; | |
3849 | tmp = dev->unpark_deadline; | |
3850 | if (time_before(deadline, tmp)) | |
3851 | deadline = tmp; | |
3852 | else if (time_before_eq(tmp, jiffies)) | |
3853 | continue; | |
3854 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3855 | continue; | |
3856 | ||
3857 | ata_eh_park_issue_cmd(dev, 1); | |
3858 | } | |
3859 | } | |
3860 | ||
3861 | now = jiffies; | |
3862 | if (time_before_eq(deadline, now)) | |
3863 | break; | |
3864 | ||
c0c362b6 | 3865 | ata_eh_release(ap); |
45fabbb7 EO |
3866 | deadline = wait_for_completion_timeout(&ap->park_req_pending, |
3867 | deadline - now); | |
c0c362b6 | 3868 | ata_eh_acquire(ap); |
45fabbb7 | 3869 | } while (deadline); |
1eca4365 TH |
3870 | ata_for_each_link(link, ap, EDGE) { |
3871 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3872 | if (!(link->eh_context.unloaded_mask & |
3873 | (1 << dev->devno))) | |
3874 | continue; | |
3875 | ||
3876 | ata_eh_park_issue_cmd(dev, 0); | |
3877 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3878 | } | |
3879 | } | |
3880 | ||
9b1e2658 | 3881 | /* the rest */ |
6b7ae954 TH |
3882 | nr_fails = 0; |
3883 | ata_for_each_link(link, ap, PMP_FIRST) { | |
9b1e2658 | 3884 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3885 | |
6b7ae954 TH |
3886 | if (sata_pmp_attached(ap) && ata_is_host_link(link)) |
3887 | goto config_lpm; | |
3888 | ||
9b1e2658 TH |
3889 | /* revalidate existing devices and attach new ones */ |
3890 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3891 | if (rc) |
6b7ae954 | 3892 | goto rest_fail; |
022bdb07 | 3893 | |
633273a3 TH |
3894 | /* if PMP got attached, return, pmp EH will take care of it */ |
3895 | if (link->device->class == ATA_DEV_PMP) { | |
3896 | ehc->i.action = 0; | |
3897 | return 0; | |
3898 | } | |
3899 | ||
9b1e2658 TH |
3900 | /* configure transfer mode if necessary */ |
3901 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3902 | rc = ata_set_mode(link, &dev); | |
3903 | if (rc) | |
6b7ae954 | 3904 | goto rest_fail; |
9b1e2658 TH |
3905 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
3906 | } | |
3907 | ||
11fc33da TH |
3908 | /* If reset has been issued, clear UA to avoid |
3909 | * disrupting the current users of the device. | |
3910 | */ | |
3911 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3912 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3913 | if (dev->class != ATA_DEV_ATAPI) |
3914 | continue; | |
3915 | rc = atapi_eh_clear_ua(dev); | |
3916 | if (rc) | |
6b7ae954 | 3917 | goto rest_fail; |
21334205 AL |
3918 | if (zpodd_dev_enabled(dev)) |
3919 | zpodd_post_poweron(dev); | |
11fc33da TH |
3920 | } |
3921 | } | |
3922 | ||
6013efd8 TH |
3923 | /* retry flush if necessary */ |
3924 | ata_for_each_dev(dev, link, ALL) { | |
9162c657 HR |
3925 | if (dev->class != ATA_DEV_ATA && |
3926 | dev->class != ATA_DEV_ZAC) | |
6013efd8 TH |
3927 | continue; |
3928 | rc = ata_eh_maybe_retry_flush(dev); | |
3929 | if (rc) | |
6b7ae954 | 3930 | goto rest_fail; |
6013efd8 TH |
3931 | } |
3932 | ||
6b7ae954 | 3933 | config_lpm: |
11fc33da | 3934 | /* configure link power saving */ |
6b7ae954 TH |
3935 | if (link->lpm_policy != ap->target_lpm_policy) { |
3936 | rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev); | |
3937 | if (rc) | |
3938 | goto rest_fail; | |
3939 | } | |
ca77329f | 3940 | |
9b1e2658 TH |
3941 | /* this link is okay now */ |
3942 | ehc->i.flags = 0; | |
3943 | continue; | |
022bdb07 | 3944 | |
6b7ae954 TH |
3945 | rest_fail: |
3946 | nr_fails++; | |
3947 | if (dev) | |
3948 | ata_eh_handle_dev_fail(dev, rc); | |
022bdb07 | 3949 | |
b06ce3e5 TH |
3950 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3951 | /* PMP reset requires working host port. | |
3952 | * Can't retry if it's frozen. | |
3953 | */ | |
071f44b1 | 3954 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3955 | goto out; |
9b1e2658 | 3956 | break; |
b06ce3e5 | 3957 | } |
022bdb07 TH |
3958 | } |
3959 | ||
6b7ae954 | 3960 | if (nr_fails) |
9b1e2658 | 3961 | goto retry; |
022bdb07 | 3962 | |
9b1e2658 TH |
3963 | out: |
3964 | if (rc && r_failed_link) | |
3965 | *r_failed_link = link; | |
3966 | ||
022bdb07 TH |
3967 | DPRINTK("EXIT, rc=%d\n", rc); |
3968 | return rc; | |
3969 | } | |
3970 | ||
3971 | /** | |
3972 | * ata_eh_finish - finish up EH | |
3973 | * @ap: host port to finish EH for | |
3974 | * | |
3975 | * Recovery is complete. Clean up EH states and retry or finish | |
3976 | * failed qcs. | |
3977 | * | |
3978 | * LOCKING: | |
3979 | * None. | |
3980 | */ | |
fb7fd614 | 3981 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 | 3982 | { |
258c4e5c | 3983 | struct ata_queued_cmd *qc; |
022bdb07 TH |
3984 | int tag; |
3985 | ||
3986 | /* retry or finish qcs */ | |
258c4e5c | 3987 | ata_qc_for_each_raw(ap, qc, tag) { |
022bdb07 TH |
3988 | if (!(qc->flags & ATA_QCFLAG_FAILED)) |
3989 | continue; | |
3990 | ||
3991 | if (qc->err_mask) { | |
3992 | /* FIXME: Once EH migration is complete, | |
3993 | * generate sense data in this function, | |
3994 | * considering both err_mask and tf. | |
3995 | */ | |
03faab78 | 3996 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3997 | ata_eh_qc_retry(qc); |
03faab78 TH |
3998 | else |
3999 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
4000 | } else { |
4001 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
4002 | ata_eh_qc_complete(qc); | |
4003 | } else { | |
4004 | /* feed zero TF to sense generation */ | |
4005 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
4006 | ata_eh_qc_retry(qc); | |
4007 | } | |
4008 | } | |
4009 | } | |
da917d69 TH |
4010 | |
4011 | /* make sure nr_active_links is zero after EH */ | |
4012 | WARN_ON(ap->nr_active_links); | |
4013 | ap->nr_active_links = 0; | |
022bdb07 TH |
4014 | } |
4015 | ||
4016 | /** | |
4017 | * ata_do_eh - do standard error handling | |
4018 | * @ap: host port to handle error for | |
a1efdaba | 4019 | * |
f5914a46 | 4020 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
4021 | * @softreset: softreset method (can be NULL) |
4022 | * @hardreset: hardreset method (can be NULL) | |
4023 | * @postreset: postreset method (can be NULL) | |
4024 | * | |
4025 | * Perform standard error handling sequence. | |
4026 | * | |
4027 | * LOCKING: | |
4028 | * Kernel thread context (may sleep). | |
4029 | */ | |
f5914a46 TH |
4030 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
4031 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
4032 | ata_postreset_fn_t postreset) | |
022bdb07 | 4033 | { |
9b1e2658 TH |
4034 | struct ata_device *dev; |
4035 | int rc; | |
4036 | ||
4037 | ata_eh_autopsy(ap); | |
4038 | ata_eh_report(ap); | |
4039 | ||
4040 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
4041 | NULL); | |
4042 | if (rc) { | |
1eca4365 | 4043 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
4044 | ata_dev_disable(dev); |
4045 | } | |
4046 | ||
022bdb07 TH |
4047 | ata_eh_finish(ap); |
4048 | } | |
500530f6 | 4049 | |
a1efdaba TH |
4050 | /** |
4051 | * ata_std_error_handler - standard error handler | |
4052 | * @ap: host port to handle error for | |
4053 | * | |
4054 | * Standard error handler | |
4055 | * | |
4056 | * LOCKING: | |
4057 | * Kernel thread context (may sleep). | |
4058 | */ | |
4059 | void ata_std_error_handler(struct ata_port *ap) | |
4060 | { | |
4061 | struct ata_port_operations *ops = ap->ops; | |
4062 | ata_reset_fn_t hardreset = ops->hardreset; | |
4063 | ||
57c9efdf | 4064 | /* ignore built-in hardreset if SCR access is not available */ |
fe06e5f9 | 4065 | if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) |
a1efdaba TH |
4066 | hardreset = NULL; |
4067 | ||
4068 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
4069 | } | |
4070 | ||
6ffa01d8 | 4071 | #ifdef CONFIG_PM |
500530f6 TH |
4072 | /** |
4073 | * ata_eh_handle_port_suspend - perform port suspend operation | |
4074 | * @ap: port to suspend | |
4075 | * | |
4076 | * Suspend @ap. | |
4077 | * | |
4078 | * LOCKING: | |
4079 | * Kernel thread context (may sleep). | |
4080 | */ | |
4081 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
4082 | { | |
4083 | unsigned long flags; | |
4084 | int rc = 0; | |
3dc67440 | 4085 | struct ata_device *dev; |
500530f6 TH |
4086 | |
4087 | /* are we suspending? */ | |
4088 | spin_lock_irqsave(ap->lock, flags); | |
4089 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 4090 | ap->pm_mesg.event & PM_EVENT_RESUME) { |
500530f6 TH |
4091 | spin_unlock_irqrestore(ap->lock, flags); |
4092 | return; | |
4093 | } | |
4094 | spin_unlock_irqrestore(ap->lock, flags); | |
4095 | ||
4096 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
4097 | ||
3dc67440 AL |
4098 | /* |
4099 | * If we have a ZPODD attached, check its zero | |
4100 | * power ready status before the port is frozen. | |
a7ff60db | 4101 | * Only needed for runtime suspend. |
3dc67440 | 4102 | */ |
a7ff60db AL |
4103 | if (PMSG_IS_AUTO(ap->pm_mesg)) { |
4104 | ata_for_each_dev(dev, &ap->link, ENABLED) { | |
4105 | if (zpodd_dev_enabled(dev)) | |
4106 | zpodd_on_suspend(dev); | |
4107 | } | |
3dc67440 AL |
4108 | } |
4109 | ||
64578a3d TH |
4110 | /* tell ACPI we're suspending */ |
4111 | rc = ata_acpi_on_suspend(ap); | |
4112 | if (rc) | |
4113 | goto out; | |
4114 | ||
500530f6 TH |
4115 | /* suspend */ |
4116 | ata_eh_freeze_port(ap); | |
4117 | ||
4118 | if (ap->ops->port_suspend) | |
4119 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
4120 | ||
a7ff60db | 4121 | ata_acpi_set_state(ap, ap->pm_mesg); |
64578a3d | 4122 | out: |
bc6e7c4b | 4123 | /* update the flags */ |
500530f6 TH |
4124 | spin_lock_irqsave(ap->lock, flags); |
4125 | ||
4126 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
4127 | if (rc == 0) | |
4128 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 4129 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
4130 | ata_port_schedule_eh(ap); |
4131 | ||
500530f6 TH |
4132 | spin_unlock_irqrestore(ap->lock, flags); |
4133 | ||
4134 | return; | |
4135 | } | |
4136 | ||
4137 | /** | |
4138 | * ata_eh_handle_port_resume - perform port resume operation | |
4139 | * @ap: port to resume | |
4140 | * | |
4141 | * Resume @ap. | |
4142 | * | |
500530f6 TH |
4143 | * LOCKING: |
4144 | * Kernel thread context (may sleep). | |
4145 | */ | |
4146 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
4147 | { | |
6f9c1ea2 TH |
4148 | struct ata_link *link; |
4149 | struct ata_device *dev; | |
500530f6 | 4150 | unsigned long flags; |
500530f6 TH |
4151 | |
4152 | /* are we resuming? */ | |
4153 | spin_lock_irqsave(ap->lock, flags); | |
4154 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 4155 | !(ap->pm_mesg.event & PM_EVENT_RESUME)) { |
500530f6 TH |
4156 | spin_unlock_irqrestore(ap->lock, flags); |
4157 | return; | |
4158 | } | |
4159 | spin_unlock_irqrestore(ap->lock, flags); | |
4160 | ||
9666f400 | 4161 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 4162 | |
6f9c1ea2 TH |
4163 | /* |
4164 | * Error timestamps are in jiffies which doesn't run while | |
4165 | * suspended and PHY events during resume isn't too uncommon. | |
4166 | * When the two are combined, it can lead to unnecessary speed | |
4167 | * downs if the machine is suspended and resumed repeatedly. | |
4168 | * Clear error history. | |
4169 | */ | |
4170 | ata_for_each_link(link, ap, HOST_FIRST) | |
4171 | ata_for_each_dev(dev, link, ALL) | |
4172 | ata_ering_clear(&dev->ering); | |
4173 | ||
a7ff60db | 4174 | ata_acpi_set_state(ap, ap->pm_mesg); |
bd3adca5 | 4175 | |
500530f6 | 4176 | if (ap->ops->port_resume) |
ae867937 | 4177 | ap->ops->port_resume(ap); |
500530f6 | 4178 | |
6746544c TH |
4179 | /* tell ACPI that we're resuming */ |
4180 | ata_acpi_on_resume(ap); | |
4181 | ||
bc6e7c4b | 4182 | /* update the flags */ |
500530f6 TH |
4183 | spin_lock_irqsave(ap->lock, flags); |
4184 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
500530f6 TH |
4185 | spin_unlock_irqrestore(ap->lock, flags); |
4186 | } | |
6ffa01d8 | 4187 | #endif /* CONFIG_PM */ |