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', | |
28 | * as Documentation/DocBook/libata.* | |
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 | ||
49 | #include "libata.h" | |
50 | ||
7d47e8d4 | 51 | enum { |
3884f7b0 | 52 | /* speed down verdicts */ |
7d47e8d4 TH |
53 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
54 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
55 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 56 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
57 | |
58 | /* error flags */ | |
59 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 60 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
d9027470 | 61 | ATA_EFLAG_OLD_ER = (1 << 31), |
3884f7b0 TH |
62 | |
63 | /* error categories */ | |
64 | ATA_ECAT_NONE = 0, | |
65 | ATA_ECAT_ATA_BUS = 1, | |
66 | ATA_ECAT_TOUT_HSM = 2, | |
67 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
68 | ATA_ECAT_DUBIOUS_NONE = 4, |
69 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
70 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
71 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
72 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 73 | |
87fbc5a0 TH |
74 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
75 | ||
0a2c0f56 TH |
76 | /* always put at least this amount of time between resets */ |
77 | ATA_EH_RESET_COOL_DOWN = 5000, | |
78 | ||
341c2c95 TH |
79 | /* Waiting in ->prereset can never be reliable. It's |
80 | * sometimes nice to wait there but it can't be depended upon; | |
81 | * otherwise, we wouldn't be resetting. Just give it enough | |
82 | * time for most drives to spin up. | |
83 | */ | |
84 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
85 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
86 | |
87 | ATA_EH_UA_TRIES = 5, | |
c2c7a89c TH |
88 | |
89 | /* probe speed down parameters, see ata_eh_schedule_probe() */ | |
90 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ | |
91 | ATA_EH_PROBE_TRIALS = 2, | |
31daabda TH |
92 | }; |
93 | ||
94 | /* The following table determines how we sequence resets. Each entry | |
95 | * represents timeout for that try. The first try can be soft or | |
96 | * hardreset. All others are hardreset if available. In most cases | |
97 | * the first reset w/ 10sec timeout should succeed. Following entries | |
35bf8821 DW |
98 | * are mostly for error handling, hotplug and those outlier devices that |
99 | * take an exceptionally long time to recover from reset. | |
31daabda TH |
100 | */ |
101 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
102 | 10000, /* most drives spin up by 10sec */ |
103 | 10000, /* > 99% working drives spin up before 20sec */ | |
35bf8821 | 104 | 35000, /* give > 30 secs of idleness for outlier devices */ |
341c2c95 | 105 | 5000, /* and sweet one last chance */ |
d8af0eb6 | 106 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
107 | }; |
108 | ||
87fbc5a0 TH |
109 | static const unsigned long ata_eh_identify_timeouts[] = { |
110 | 5000, /* covers > 99% of successes and not too boring on failures */ | |
111 | 10000, /* combined time till here is enough even for media access */ | |
112 | 30000, /* for true idiots */ | |
113 | ULONG_MAX, | |
114 | }; | |
115 | ||
6013efd8 TH |
116 | static const unsigned long ata_eh_flush_timeouts[] = { |
117 | 15000, /* be generous with flush */ | |
118 | 15000, /* ditto */ | |
119 | 30000, /* and even more generous */ | |
120 | ULONG_MAX, | |
121 | }; | |
122 | ||
87fbc5a0 TH |
123 | static const unsigned long ata_eh_other_timeouts[] = { |
124 | 5000, /* same rationale as identify timeout */ | |
125 | 10000, /* ditto */ | |
126 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
127 | ULONG_MAX, | |
128 | }; | |
129 | ||
130 | struct ata_eh_cmd_timeout_ent { | |
131 | const u8 *commands; | |
132 | const unsigned long *timeouts; | |
133 | }; | |
134 | ||
135 | /* The following table determines timeouts to use for EH internal | |
136 | * commands. Each table entry is a command class and matches the | |
137 | * commands the entry applies to and the timeout table to use. | |
138 | * | |
139 | * On the retry after a command timed out, the next timeout value from | |
140 | * the table is used. If the table doesn't contain further entries, | |
141 | * the last value is used. | |
142 | * | |
143 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
144 | * command class, so if SET_FEATURES times out on the first try, the | |
145 | * next try will use the second timeout value only for that class. | |
146 | */ | |
147 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
148 | static const struct ata_eh_cmd_timeout_ent | |
149 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
150 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
151 | .timeouts = ata_eh_identify_timeouts, }, | |
152 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), | |
153 | .timeouts = ata_eh_other_timeouts, }, | |
154 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
155 | .timeouts = ata_eh_other_timeouts, }, | |
156 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
157 | .timeouts = ata_eh_other_timeouts, }, | |
158 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
159 | .timeouts = ata_eh_other_timeouts, }, | |
6013efd8 TH |
160 | { .commands = CMDS(ATA_CMD_FLUSH, ATA_CMD_FLUSH_EXT), |
161 | .timeouts = ata_eh_flush_timeouts }, | |
87fbc5a0 TH |
162 | }; |
163 | #undef CMDS | |
164 | ||
ad9e2762 | 165 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 166 | #ifdef CONFIG_PM |
500530f6 TH |
167 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
168 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
169 | #else /* CONFIG_PM */ |
170 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
171 | { } | |
172 | ||
173 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
174 | { } | |
6ffa01d8 | 175 | #endif /* CONFIG_PM */ |
ad9e2762 | 176 | |
b64bbc39 TH |
177 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
178 | va_list args) | |
179 | { | |
180 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
181 | ATA_EH_DESC_LEN - ehi->desc_len, | |
182 | fmt, args); | |
183 | } | |
184 | ||
185 | /** | |
186 | * __ata_ehi_push_desc - push error description without adding separator | |
187 | * @ehi: target EHI | |
188 | * @fmt: printf format string | |
189 | * | |
190 | * Format string according to @fmt and append it to @ehi->desc. | |
191 | * | |
192 | * LOCKING: | |
193 | * spin_lock_irqsave(host lock) | |
194 | */ | |
195 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
196 | { | |
197 | va_list args; | |
198 | ||
199 | va_start(args, fmt); | |
200 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
201 | va_end(args); | |
202 | } | |
203 | ||
204 | /** | |
205 | * ata_ehi_push_desc - push error description with separator | |
206 | * @ehi: target EHI | |
207 | * @fmt: printf format string | |
208 | * | |
209 | * Format string according to @fmt and append it to @ehi->desc. | |
210 | * If @ehi->desc is not empty, ", " is added in-between. | |
211 | * | |
212 | * LOCKING: | |
213 | * spin_lock_irqsave(host lock) | |
214 | */ | |
215 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
216 | { | |
217 | va_list args; | |
218 | ||
219 | if (ehi->desc_len) | |
220 | __ata_ehi_push_desc(ehi, ", "); | |
221 | ||
222 | va_start(args, fmt); | |
223 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
224 | va_end(args); | |
225 | } | |
226 | ||
227 | /** | |
228 | * ata_ehi_clear_desc - clean error description | |
229 | * @ehi: target EHI | |
230 | * | |
231 | * Clear @ehi->desc. | |
232 | * | |
233 | * LOCKING: | |
234 | * spin_lock_irqsave(host lock) | |
235 | */ | |
236 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
237 | { | |
238 | ehi->desc[0] = '\0'; | |
239 | ehi->desc_len = 0; | |
240 | } | |
241 | ||
cbcdd875 TH |
242 | /** |
243 | * ata_port_desc - append port description | |
244 | * @ap: target ATA port | |
245 | * @fmt: printf format string | |
246 | * | |
247 | * Format string according to @fmt and append it to port | |
248 | * description. If port description is not empty, " " is added | |
249 | * in-between. This function is to be used while initializing | |
250 | * ata_host. The description is printed on host registration. | |
251 | * | |
252 | * LOCKING: | |
253 | * None. | |
254 | */ | |
255 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
256 | { | |
257 | va_list args; | |
258 | ||
259 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
260 | ||
261 | if (ap->link.eh_info.desc_len) | |
262 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
263 | ||
264 | va_start(args, fmt); | |
265 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
266 | va_end(args); | |
267 | } | |
268 | ||
269 | #ifdef CONFIG_PCI | |
270 | ||
271 | /** | |
272 | * ata_port_pbar_desc - append PCI BAR description | |
273 | * @ap: target ATA port | |
274 | * @bar: target PCI BAR | |
275 | * @offset: offset into PCI BAR | |
276 | * @name: name of the area | |
277 | * | |
278 | * If @offset is negative, this function formats a string which | |
279 | * contains the name, address, size and type of the BAR and | |
280 | * appends it to the port description. If @offset is zero or | |
281 | * positive, only name and offsetted address is appended. | |
282 | * | |
283 | * LOCKING: | |
284 | * None. | |
285 | */ | |
286 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
287 | const char *name) | |
288 | { | |
289 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
290 | char *type = ""; | |
291 | unsigned long long start, len; | |
292 | ||
293 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
294 | type = "m"; | |
295 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
296 | type = "i"; | |
297 | ||
298 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
299 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
300 | ||
301 | if (offset < 0) | |
302 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
303 | else | |
e6a73ab1 AM |
304 | ata_port_desc(ap, "%s 0x%llx", name, |
305 | start + (unsigned long long)offset); | |
cbcdd875 TH |
306 | } |
307 | ||
308 | #endif /* CONFIG_PCI */ | |
309 | ||
87fbc5a0 TH |
310 | static int ata_lookup_timeout_table(u8 cmd) |
311 | { | |
312 | int i; | |
313 | ||
314 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
315 | const u8 *cur; | |
316 | ||
317 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
318 | if (*cur == cmd) | |
319 | return i; | |
320 | } | |
321 | ||
322 | return -1; | |
323 | } | |
324 | ||
325 | /** | |
326 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
327 | * @dev: target device | |
328 | * @cmd: internal command to be issued | |
329 | * | |
330 | * Determine timeout for internal command @cmd for @dev. | |
331 | * | |
332 | * LOCKING: | |
333 | * EH context. | |
334 | * | |
335 | * RETURNS: | |
336 | * Determined timeout. | |
337 | */ | |
338 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) | |
339 | { | |
340 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
341 | int ent = ata_lookup_timeout_table(cmd); | |
342 | int idx; | |
343 | ||
344 | if (ent < 0) | |
345 | return ATA_EH_CMD_DFL_TIMEOUT; | |
346 | ||
347 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
348 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
349 | } | |
350 | ||
351 | /** | |
352 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
353 | * @dev: target device | |
354 | * @cmd: internal command which timed out | |
355 | * | |
356 | * Notify EH that internal command @cmd for @dev timed out. This | |
357 | * function should be called only for commands whose timeouts are | |
358 | * determined using ata_internal_cmd_timeout(). | |
359 | * | |
360 | * LOCKING: | |
361 | * EH context. | |
362 | */ | |
363 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
364 | { | |
365 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
366 | int ent = ata_lookup_timeout_table(cmd); | |
367 | int idx; | |
368 | ||
369 | if (ent < 0) | |
370 | return; | |
371 | ||
372 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
373 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) | |
374 | ehc->cmd_timeout_idx[dev->devno][ent]++; | |
375 | } | |
376 | ||
3884f7b0 | 377 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
378 | unsigned int err_mask) |
379 | { | |
380 | struct ata_ering_entry *ent; | |
381 | ||
382 | WARN_ON(!err_mask); | |
383 | ||
384 | ering->cursor++; | |
385 | ering->cursor %= ATA_ERING_SIZE; | |
386 | ||
387 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 388 | ent->eflags = eflags; |
0c247c55 TH |
389 | ent->err_mask = err_mask; |
390 | ent->timestamp = get_jiffies_64(); | |
391 | } | |
392 | ||
76326ac1 TH |
393 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
394 | { | |
395 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
396 | ||
397 | if (ent->err_mask) | |
398 | return ent; | |
399 | return NULL; | |
400 | } | |
401 | ||
d9027470 GG |
402 | int ata_ering_map(struct ata_ering *ering, |
403 | int (*map_fn)(struct ata_ering_entry *, void *), | |
404 | void *arg) | |
0c247c55 TH |
405 | { |
406 | int idx, rc = 0; | |
407 | struct ata_ering_entry *ent; | |
408 | ||
409 | idx = ering->cursor; | |
410 | do { | |
411 | ent = &ering->ring[idx]; | |
412 | if (!ent->err_mask) | |
413 | break; | |
414 | rc = map_fn(ent, arg); | |
415 | if (rc) | |
416 | break; | |
417 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
418 | } while (idx != ering->cursor); | |
419 | ||
420 | return rc; | |
421 | } | |
422 | ||
60428407 | 423 | static int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg) |
d9027470 GG |
424 | { |
425 | ent->eflags |= ATA_EFLAG_OLD_ER; | |
426 | return 0; | |
427 | } | |
428 | ||
429 | static void ata_ering_clear(struct ata_ering *ering) | |
430 | { | |
431 | ata_ering_map(ering, ata_ering_clear_cb, NULL); | |
432 | } | |
433 | ||
64f65ca6 TH |
434 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
435 | { | |
9af5c9c9 | 436 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
437 | |
438 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
439 | } | |
440 | ||
f58229f8 | 441 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
442 | struct ata_eh_info *ehi, unsigned int action) |
443 | { | |
f58229f8 | 444 | struct ata_device *tdev; |
af181c2d TH |
445 | |
446 | if (!dev) { | |
447 | ehi->action &= ~action; | |
1eca4365 | 448 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 449 | ehi->dev_action[tdev->devno] &= ~action; |
af181c2d TH |
450 | } else { |
451 | /* doesn't make sense for port-wide EH actions */ | |
452 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
453 | ||
454 | /* break ehi->action into ehi->dev_action */ | |
455 | if (ehi->action & action) { | |
1eca4365 | 456 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
457 | ehi->dev_action[tdev->devno] |= |
458 | ehi->action & action; | |
af181c2d TH |
459 | ehi->action &= ~action; |
460 | } | |
461 | ||
462 | /* turn off the specified per-dev action */ | |
463 | ehi->dev_action[dev->devno] &= ~action; | |
464 | } | |
465 | } | |
466 | ||
c0c362b6 TH |
467 | /** |
468 | * ata_eh_acquire - acquire EH ownership | |
469 | * @ap: ATA port to acquire EH ownership for | |
470 | * | |
471 | * Acquire EH ownership for @ap. This is the basic exclusion | |
472 | * mechanism for ports sharing a host. Only one port hanging off | |
473 | * the same host can claim the ownership of EH. | |
474 | * | |
475 | * LOCKING: | |
476 | * EH context. | |
477 | */ | |
478 | void ata_eh_acquire(struct ata_port *ap) | |
479 | { | |
480 | mutex_lock(&ap->host->eh_mutex); | |
481 | WARN_ON_ONCE(ap->host->eh_owner); | |
482 | ap->host->eh_owner = current; | |
483 | } | |
484 | ||
485 | /** | |
486 | * ata_eh_release - release EH ownership | |
487 | * @ap: ATA port to release EH ownership for | |
488 | * | |
489 | * Release EH ownership for @ap if the caller. The caller must | |
490 | * have acquired EH ownership using ata_eh_acquire() previously. | |
491 | * | |
492 | * LOCKING: | |
493 | * EH context. | |
494 | */ | |
495 | void ata_eh_release(struct ata_port *ap) | |
496 | { | |
497 | WARN_ON_ONCE(ap->host->eh_owner != current); | |
498 | ap->host->eh_owner = NULL; | |
499 | mutex_unlock(&ap->host->eh_mutex); | |
500 | } | |
501 | ||
ece1d636 TH |
502 | /** |
503 | * ata_scsi_timed_out - SCSI layer time out callback | |
504 | * @cmd: timed out SCSI command | |
505 | * | |
506 | * Handles SCSI layer timeout. We race with normal completion of | |
507 | * the qc for @cmd. If the qc is already gone, we lose and let | |
508 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has | |
509 | * timed out and EH should be invoked. Prevent ata_qc_complete() | |
510 | * from finishing it by setting EH_SCHEDULED and return | |
511 | * EH_NOT_HANDLED. | |
512 | * | |
ad9e2762 TH |
513 | * TODO: kill this function once old EH is gone. |
514 | * | |
ece1d636 TH |
515 | * LOCKING: |
516 | * Called from timer context | |
517 | * | |
518 | * RETURNS: | |
519 | * EH_HANDLED or EH_NOT_HANDLED | |
520 | */ | |
242f9dcb | 521 | enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) |
ece1d636 TH |
522 | { |
523 | struct Scsi_Host *host = cmd->device->host; | |
35bb94b1 | 524 | struct ata_port *ap = ata_shost_to_port(host); |
ece1d636 TH |
525 | unsigned long flags; |
526 | struct ata_queued_cmd *qc; | |
242f9dcb | 527 | enum blk_eh_timer_return ret; |
ece1d636 TH |
528 | |
529 | DPRINTK("ENTER\n"); | |
530 | ||
ad9e2762 | 531 | if (ap->ops->error_handler) { |
242f9dcb | 532 | ret = BLK_EH_NOT_HANDLED; |
ad9e2762 TH |
533 | goto out; |
534 | } | |
535 | ||
242f9dcb | 536 | ret = BLK_EH_HANDLED; |
ba6a1308 | 537 | spin_lock_irqsave(ap->lock, flags); |
9af5c9c9 | 538 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
ece1d636 TH |
539 | if (qc) { |
540 | WARN_ON(qc->scsicmd != cmd); | |
541 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; | |
542 | qc->err_mask |= AC_ERR_TIMEOUT; | |
242f9dcb | 543 | ret = BLK_EH_NOT_HANDLED; |
ece1d636 | 544 | } |
ba6a1308 | 545 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 546 | |
ad9e2762 | 547 | out: |
ece1d636 TH |
548 | DPRINTK("EXIT, ret=%d\n", ret); |
549 | return ret; | |
550 | } | |
551 | ||
ece180d1 TH |
552 | static void ata_eh_unload(struct ata_port *ap) |
553 | { | |
554 | struct ata_link *link; | |
555 | struct ata_device *dev; | |
556 | unsigned long flags; | |
557 | ||
558 | /* Restore SControl IPM and SPD for the next driver and | |
559 | * disable attached devices. | |
560 | */ | |
561 | ata_for_each_link(link, ap, PMP_FIRST) { | |
562 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
563 | ata_for_each_dev(dev, link, ALL) | |
564 | ata_dev_disable(dev); | |
565 | } | |
566 | ||
567 | /* freeze and set UNLOADED */ | |
568 | spin_lock_irqsave(ap->lock, flags); | |
569 | ||
570 | ata_port_freeze(ap); /* won't be thawed */ | |
571 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
572 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
573 | ||
574 | spin_unlock_irqrestore(ap->lock, flags); | |
575 | } | |
576 | ||
ece1d636 TH |
577 | /** |
578 | * ata_scsi_error - SCSI layer error handler callback | |
579 | * @host: SCSI host on which error occurred | |
580 | * | |
581 | * Handles SCSI-layer-thrown error events. | |
582 | * | |
583 | * LOCKING: | |
584 | * Inherited from SCSI layer (none, can sleep) | |
585 | * | |
586 | * RETURNS: | |
587 | * Zero. | |
588 | */ | |
381544bb | 589 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 590 | { |
35bb94b1 | 591 | struct ata_port *ap = ata_shost_to_port(host); |
ad9e2762 | 592 | unsigned long flags; |
c34aeebc | 593 | LIST_HEAD(eh_work_q); |
ece1d636 TH |
594 | |
595 | DPRINTK("ENTER\n"); | |
596 | ||
c34aeebc JB |
597 | spin_lock_irqsave(host->host_lock, flags); |
598 | list_splice_init(&host->eh_cmd_q, &eh_work_q); | |
599 | spin_unlock_irqrestore(host->host_lock, flags); | |
600 | ||
0e0b494c JB |
601 | ata_scsi_cmd_error_handler(host, ap, &eh_work_q); |
602 | ||
603 | /* If we timed raced normal completion and there is nothing to | |
604 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ | |
605 | ata_scsi_port_error_handler(host, ap); | |
606 | ||
607 | /* finish or retry handled scmd's and clean up */ | |
608 | WARN_ON(host->host_failed || !list_empty(&eh_work_q)); | |
609 | ||
610 | DPRINTK("EXIT\n"); | |
611 | } | |
612 | ||
613 | /** | |
614 | * ata_scsi_cmd_error_handler - error callback for a list of commands | |
615 | * @host: scsi host containing the port | |
616 | * @ap: ATA port within the host | |
617 | * @eh_work_q: list of commands to process | |
618 | * | |
619 | * process the given list of commands and return those finished to the | |
620 | * ap->eh_done_q. This function is the first part of the libata error | |
621 | * handler which processes a given list of failed commands. | |
622 | */ | |
623 | void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, | |
624 | struct list_head *eh_work_q) | |
625 | { | |
626 | int i; | |
627 | unsigned long flags; | |
628 | ||
c429137a TH |
629 | /* make sure sff pio task is not running */ |
630 | ata_sff_flush_pio_task(ap); | |
ece1d636 | 631 | |
cca3974e | 632 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
633 | |
634 | /* For new EH, all qcs are finished in one of three ways - | |
635 | * normal completion, error completion, and SCSI timeout. | |
c96f1732 | 636 | * Both completions can race against SCSI timeout. When normal |
ad9e2762 TH |
637 | * completion wins, the qc never reaches EH. When error |
638 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
639 | * | |
640 | * When SCSI timeout wins, things are a bit more complex. | |
641 | * Normal or error completion can occur after the timeout but | |
642 | * before this point. In such cases, both types of | |
643 | * completions are honored. A scmd is determined to have | |
644 | * timed out iff its associated qc is active and not failed. | |
645 | */ | |
646 | if (ap->ops->error_handler) { | |
647 | struct scsi_cmnd *scmd, *tmp; | |
648 | int nr_timedout = 0; | |
649 | ||
e30349d2 | 650 | spin_lock_irqsave(ap->lock, flags); |
d9027470 | 651 | |
c96f1732 AC |
652 | /* This must occur under the ap->lock as we don't want |
653 | a polled recovery to race the real interrupt handler | |
d9027470 | 654 | |
c96f1732 AC |
655 | The lost_interrupt handler checks for any completed but |
656 | non-notified command and completes much like an IRQ handler. | |
d9027470 | 657 | |
c96f1732 AC |
658 | We then fall into the error recovery code which will treat |
659 | this as if normal completion won the race */ | |
660 | ||
661 | if (ap->ops->lost_interrupt) | |
662 | ap->ops->lost_interrupt(ap); | |
d9027470 | 663 | |
0e0b494c | 664 | list_for_each_entry_safe(scmd, tmp, eh_work_q, eh_entry) { |
ad9e2762 TH |
665 | struct ata_queued_cmd *qc; |
666 | ||
667 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
668 | qc = __ata_qc_from_tag(ap, i); | |
669 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
670 | qc->scsicmd == scmd) | |
671 | break; | |
672 | } | |
673 | ||
674 | if (i < ATA_MAX_QUEUE) { | |
675 | /* the scmd has an associated qc */ | |
676 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
677 | /* which hasn't failed yet, timeout */ | |
678 | qc->err_mask |= AC_ERR_TIMEOUT; | |
679 | qc->flags |= ATA_QCFLAG_FAILED; | |
680 | nr_timedout++; | |
681 | } | |
682 | } else { | |
683 | /* Normal completion occurred after | |
684 | * SCSI timeout but before this point. | |
685 | * Successfully complete it. | |
686 | */ | |
687 | scmd->retries = scmd->allowed; | |
688 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
689 | } | |
690 | } | |
691 | ||
692 | /* If we have timed out qcs. They belong to EH from | |
693 | * this point but the state of the controller is | |
694 | * unknown. Freeze the port to make sure the IRQ | |
695 | * handler doesn't diddle with those qcs. This must | |
696 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
697 | */ | |
698 | if (nr_timedout) | |
699 | __ata_port_freeze(ap); | |
700 | ||
e30349d2 | 701 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
702 | |
703 | /* initialize eh_tries */ | |
704 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 705 | } else |
e30349d2 | 706 | spin_unlock_wait(ap->lock); |
d9027470 | 707 | |
0e0b494c JB |
708 | } |
709 | EXPORT_SYMBOL(ata_scsi_cmd_error_handler); | |
710 | ||
711 | /** | |
712 | * ata_scsi_port_error_handler - recover the port after the commands | |
713 | * @host: SCSI host containing the port | |
714 | * @ap: the ATA port | |
715 | * | |
716 | * Handle the recovery of the port @ap after all the commands | |
717 | * have been recovered. | |
718 | */ | |
719 | void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap) | |
720 | { | |
721 | unsigned long flags; | |
ad9e2762 | 722 | |
ad9e2762 TH |
723 | /* invoke error handler */ |
724 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
725 | struct ata_link *link; |
726 | ||
c0c362b6 TH |
727 | /* acquire EH ownership */ |
728 | ata_eh_acquire(ap); | |
729 | repeat: | |
5ddf24c5 TH |
730 | /* kill fast drain timer */ |
731 | del_timer_sync(&ap->fastdrain_timer); | |
732 | ||
500530f6 TH |
733 | /* process port resume request */ |
734 | ata_eh_handle_port_resume(ap); | |
735 | ||
f3e81b19 | 736 | /* fetch & clear EH info */ |
e30349d2 | 737 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 738 | |
1eca4365 | 739 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
740 | struct ata_eh_context *ehc = &link->eh_context; |
741 | struct ata_device *dev; | |
742 | ||
cf1b86c8 TH |
743 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
744 | link->eh_context.i = link->eh_info; | |
745 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 746 | |
1eca4365 | 747 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
748 | int devno = dev->devno; |
749 | ||
750 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
751 | if (ata_ncq_enabled(dev)) | |
752 | ehc->saved_ncq_enabled |= 1 << devno; | |
753 | } | |
cf1b86c8 | 754 | } |
f3e81b19 | 755 | |
b51e9e5d TH |
756 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
757 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 758 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 759 | |
e30349d2 | 760 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 761 | |
500530f6 TH |
762 | /* invoke EH, skip if unloading or suspended */ |
763 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 764 | ap->ops->error_handler(ap); |
ece180d1 TH |
765 | else { |
766 | /* if unloading, commence suicide */ | |
767 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
768 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
769 | ata_eh_unload(ap); | |
720ba126 | 770 | ata_eh_finish(ap); |
ece180d1 | 771 | } |
ad9e2762 | 772 | |
500530f6 TH |
773 | /* process port suspend request */ |
774 | ata_eh_handle_port_suspend(ap); | |
775 | ||
25985edc | 776 | /* Exception might have happened after ->error_handler |
ad9e2762 TH |
777 | * recovered the port but before this point. Repeat |
778 | * EH in such case. | |
779 | */ | |
e30349d2 | 780 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 781 | |
b51e9e5d | 782 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 783 | if (--ap->eh_tries) { |
e30349d2 | 784 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
785 | goto repeat; |
786 | } | |
a9a79dfe JP |
787 | ata_port_err(ap, |
788 | "EH pending after %d tries, giving up\n", | |
789 | ATA_EH_MAX_TRIES); | |
914616a3 | 790 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
791 | } |
792 | ||
f3e81b19 | 793 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 794 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 795 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 796 | |
e4a9c373 DW |
797 | /* end eh (clear host_eh_scheduled) while holding |
798 | * ap->lock such that if exception occurs after this | |
799 | * point but before EH completion, SCSI midlayer will | |
ad9e2762 TH |
800 | * re-initiate EH. |
801 | */ | |
e4a9c373 | 802 | ap->ops->end_eh(ap); |
ad9e2762 | 803 | |
e30349d2 | 804 | spin_unlock_irqrestore(ap->lock, flags); |
c0c362b6 | 805 | ata_eh_release(ap); |
ad9e2762 | 806 | } else { |
9af5c9c9 | 807 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
808 | ap->ops->eng_timeout(ap); |
809 | } | |
ece1d636 | 810 | |
ece1d636 TH |
811 | scsi_eh_flush_done_q(&ap->eh_done_q); |
812 | ||
ad9e2762 | 813 | /* clean up */ |
e30349d2 | 814 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 815 | |
1cdaf534 | 816 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 817 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 818 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
ad72cf98 | 819 | schedule_delayed_work(&ap->hotplug_task, 0); |
1cdaf534 TH |
820 | |
821 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
a9a79dfe | 822 | ata_port_info(ap, "EH complete\n"); |
580b2102 | 823 | |
b51e9e5d | 824 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 825 | |
c6cf9e99 | 826 | /* tell wait_eh that we're done */ |
b51e9e5d | 827 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
828 | wake_up_all(&ap->eh_wait_q); |
829 | ||
e30349d2 | 830 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 831 | } |
0e0b494c | 832 | EXPORT_SYMBOL_GPL(ata_scsi_port_error_handler); |
ece1d636 | 833 | |
c6cf9e99 TH |
834 | /** |
835 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
836 | * @ap: Port to wait EH for | |
837 | * | |
838 | * Wait until the currently pending EH is complete. | |
839 | * | |
840 | * LOCKING: | |
841 | * Kernel thread context (may sleep). | |
842 | */ | |
843 | void ata_port_wait_eh(struct ata_port *ap) | |
844 | { | |
845 | unsigned long flags; | |
846 | DEFINE_WAIT(wait); | |
847 | ||
848 | retry: | |
ba6a1308 | 849 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 850 | |
b51e9e5d | 851 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 852 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 853 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 854 | schedule(); |
ba6a1308 | 855 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 856 | } |
0a1b622e | 857 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 858 | |
ba6a1308 | 859 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
860 | |
861 | /* make sure SCSI EH is complete */ | |
cca3974e | 862 | if (scsi_host_in_recovery(ap->scsi_host)) { |
97750ceb | 863 | ata_msleep(ap, 10); |
c6cf9e99 TH |
864 | goto retry; |
865 | } | |
866 | } | |
81c757bc | 867 | EXPORT_SYMBOL_GPL(ata_port_wait_eh); |
c6cf9e99 | 868 | |
5ddf24c5 TH |
869 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
870 | { | |
871 | unsigned int tag; | |
872 | int nr = 0; | |
873 | ||
874 | /* count only non-internal commands */ | |
875 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
876 | if (ata_qc_from_tag(ap, tag)) | |
877 | nr++; | |
878 | ||
879 | return nr; | |
880 | } | |
881 | ||
882 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
883 | { | |
884 | struct ata_port *ap = (void *)arg; | |
885 | unsigned long flags; | |
886 | int cnt; | |
887 | ||
888 | spin_lock_irqsave(ap->lock, flags); | |
889 | ||
890 | cnt = ata_eh_nr_in_flight(ap); | |
891 | ||
892 | /* are we done? */ | |
893 | if (!cnt) | |
894 | goto out_unlock; | |
895 | ||
896 | if (cnt == ap->fastdrain_cnt) { | |
897 | unsigned int tag; | |
898 | ||
899 | /* No progress during the last interval, tag all | |
900 | * in-flight qcs as timed out and freeze the port. | |
901 | */ | |
902 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
903 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
904 | if (qc) | |
905 | qc->err_mask |= AC_ERR_TIMEOUT; | |
906 | } | |
907 | ||
908 | ata_port_freeze(ap); | |
909 | } else { | |
910 | /* some qcs have finished, give it another chance */ | |
911 | ap->fastdrain_cnt = cnt; | |
912 | ap->fastdrain_timer.expires = | |
341c2c95 | 913 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
914 | add_timer(&ap->fastdrain_timer); |
915 | } | |
916 | ||
917 | out_unlock: | |
918 | spin_unlock_irqrestore(ap->lock, flags); | |
919 | } | |
920 | ||
921 | /** | |
922 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
923 | * @ap: target ATA port | |
924 | * @fastdrain: activate fast drain | |
925 | * | |
926 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
927 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
928 | * that EH kicks in in timely manner. | |
929 | * | |
930 | * LOCKING: | |
931 | * spin_lock_irqsave(host lock) | |
932 | */ | |
933 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
934 | { | |
935 | int cnt; | |
936 | ||
937 | /* already scheduled? */ | |
938 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
939 | return; | |
940 | ||
941 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
942 | ||
943 | if (!fastdrain) | |
944 | return; | |
945 | ||
946 | /* do we have in-flight qcs? */ | |
947 | cnt = ata_eh_nr_in_flight(ap); | |
948 | if (!cnt) | |
949 | return; | |
950 | ||
951 | /* activate fast drain */ | |
952 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
953 | ap->fastdrain_timer.expires = |
954 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
955 | add_timer(&ap->fastdrain_timer); |
956 | } | |
957 | ||
f686bcb8 TH |
958 | /** |
959 | * ata_qc_schedule_eh - schedule qc for error handling | |
960 | * @qc: command to schedule error handling for | |
961 | * | |
962 | * Schedule error handling for @qc. EH will kick in as soon as | |
963 | * other commands are drained. | |
964 | * | |
965 | * LOCKING: | |
cca3974e | 966 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
967 | */ |
968 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
969 | { | |
970 | struct ata_port *ap = qc->ap; | |
fa41efda TH |
971 | struct request_queue *q = qc->scsicmd->device->request_queue; |
972 | unsigned long flags; | |
f686bcb8 TH |
973 | |
974 | WARN_ON(!ap->ops->error_handler); | |
975 | ||
976 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 977 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
978 | |
979 | /* The following will fail if timeout has already expired. | |
980 | * ata_scsi_error() takes care of such scmds on EH entry. | |
981 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
982 | * this function completes. | |
983 | */ | |
fa41efda | 984 | spin_lock_irqsave(q->queue_lock, flags); |
242f9dcb | 985 | blk_abort_request(qc->scsicmd->request); |
fa41efda | 986 | spin_unlock_irqrestore(q->queue_lock, flags); |
f686bcb8 TH |
987 | } |
988 | ||
7b70fc03 | 989 | /** |
e4a9c373 DW |
990 | * ata_std_sched_eh - non-libsas ata_ports issue eh with this common routine |
991 | * @ap: ATA port to schedule EH for | |
7b70fc03 | 992 | * |
e4a9c373 | 993 | * LOCKING: inherited from ata_port_schedule_eh |
cca3974e | 994 | * spin_lock_irqsave(host lock) |
7b70fc03 | 995 | */ |
e4a9c373 | 996 | void ata_std_sched_eh(struct ata_port *ap) |
7b70fc03 TH |
997 | { |
998 | WARN_ON(!ap->ops->error_handler); | |
999 | ||
f4d6d004 TH |
1000 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
1001 | return; | |
1002 | ||
5ddf24c5 | 1003 | ata_eh_set_pending(ap, 1); |
cca3974e | 1004 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
1005 | |
1006 | DPRINTK("port EH scheduled\n"); | |
1007 | } | |
e4a9c373 DW |
1008 | EXPORT_SYMBOL_GPL(ata_std_sched_eh); |
1009 | ||
1010 | /** | |
1011 | * ata_std_end_eh - non-libsas ata_ports complete eh with this common routine | |
1012 | * @ap: ATA port to end EH for | |
1013 | * | |
1014 | * In the libata object model there is a 1:1 mapping of ata_port to | |
1015 | * shost, so host fields can be directly manipulated under ap->lock, in | |
1016 | * the libsas case we need to hold a lock at the ha->level to coordinate | |
1017 | * these events. | |
1018 | * | |
1019 | * LOCKING: | |
1020 | * spin_lock_irqsave(host lock) | |
1021 | */ | |
1022 | void ata_std_end_eh(struct ata_port *ap) | |
1023 | { | |
1024 | struct Scsi_Host *host = ap->scsi_host; | |
1025 | ||
1026 | host->host_eh_scheduled = 0; | |
1027 | } | |
1028 | EXPORT_SYMBOL(ata_std_end_eh); | |
1029 | ||
1030 | ||
1031 | /** | |
1032 | * ata_port_schedule_eh - schedule error handling without a qc | |
1033 | * @ap: ATA port to schedule EH for | |
1034 | * | |
1035 | * Schedule error handling for @ap. EH will kick in as soon as | |
1036 | * all commands are drained. | |
1037 | * | |
1038 | * LOCKING: | |
1039 | * spin_lock_irqsave(host lock) | |
1040 | */ | |
1041 | void ata_port_schedule_eh(struct ata_port *ap) | |
1042 | { | |
1043 | /* see: ata_std_sched_eh, unless you know better */ | |
1044 | ap->ops->sched_eh(ap); | |
1045 | } | |
7b70fc03 | 1046 | |
dbd82616 | 1047 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
1048 | { |
1049 | int tag, nr_aborted = 0; | |
1050 | ||
1051 | WARN_ON(!ap->ops->error_handler); | |
1052 | ||
5ddf24c5 TH |
1053 | /* we're gonna abort all commands, no need for fast drain */ |
1054 | ata_eh_set_pending(ap, 0); | |
1055 | ||
7b70fc03 TH |
1056 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
1057 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
1058 | ||
dbd82616 | 1059 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
1060 | qc->flags |= ATA_QCFLAG_FAILED; |
1061 | ata_qc_complete(qc); | |
1062 | nr_aborted++; | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | if (!nr_aborted) | |
1067 | ata_port_schedule_eh(ap); | |
1068 | ||
1069 | return nr_aborted; | |
1070 | } | |
1071 | ||
dbd82616 TH |
1072 | /** |
1073 | * ata_link_abort - abort all qc's on the link | |
1074 | * @link: ATA link to abort qc's for | |
1075 | * | |
1076 | * Abort all active qc's active on @link and schedule EH. | |
1077 | * | |
1078 | * LOCKING: | |
1079 | * spin_lock_irqsave(host lock) | |
1080 | * | |
1081 | * RETURNS: | |
1082 | * Number of aborted qc's. | |
1083 | */ | |
1084 | int ata_link_abort(struct ata_link *link) | |
1085 | { | |
1086 | return ata_do_link_abort(link->ap, link); | |
1087 | } | |
1088 | ||
1089 | /** | |
1090 | * ata_port_abort - abort all qc's on the port | |
1091 | * @ap: ATA port to abort qc's for | |
1092 | * | |
1093 | * Abort all active qc's of @ap and schedule EH. | |
1094 | * | |
1095 | * LOCKING: | |
1096 | * spin_lock_irqsave(host_set lock) | |
1097 | * | |
1098 | * RETURNS: | |
1099 | * Number of aborted qc's. | |
1100 | */ | |
1101 | int ata_port_abort(struct ata_port *ap) | |
1102 | { | |
1103 | return ata_do_link_abort(ap, NULL); | |
1104 | } | |
1105 | ||
e3180499 TH |
1106 | /** |
1107 | * __ata_port_freeze - freeze port | |
1108 | * @ap: ATA port to freeze | |
1109 | * | |
1110 | * This function is called when HSM violation or some other | |
1111 | * condition disrupts normal operation of the port. Frozen port | |
1112 | * is not allowed to perform any operation until the port is | |
1113 | * thawed, which usually follows a successful reset. | |
1114 | * | |
1115 | * ap->ops->freeze() callback can be used for freezing the port | |
1116 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
1117 | * port cannot be frozen hardware-wise, the interrupt handler | |
1118 | * must ack and clear interrupts unconditionally while the port | |
1119 | * is frozen. | |
1120 | * | |
1121 | * LOCKING: | |
cca3974e | 1122 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1123 | */ |
1124 | static void __ata_port_freeze(struct ata_port *ap) | |
1125 | { | |
1126 | WARN_ON(!ap->ops->error_handler); | |
1127 | ||
1128 | if (ap->ops->freeze) | |
1129 | ap->ops->freeze(ap); | |
1130 | ||
b51e9e5d | 1131 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 1132 | |
44877b4e | 1133 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
1134 | } |
1135 | ||
1136 | /** | |
1137 | * ata_port_freeze - abort & freeze port | |
1138 | * @ap: ATA port to freeze | |
1139 | * | |
54c38444 JG |
1140 | * Abort and freeze @ap. The freeze operation must be called |
1141 | * first, because some hardware requires special operations | |
1142 | * before the taskfile registers are accessible. | |
e3180499 TH |
1143 | * |
1144 | * LOCKING: | |
cca3974e | 1145 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1146 | * |
1147 | * RETURNS: | |
1148 | * Number of aborted commands. | |
1149 | */ | |
1150 | int ata_port_freeze(struct ata_port *ap) | |
1151 | { | |
1152 | int nr_aborted; | |
1153 | ||
1154 | WARN_ON(!ap->ops->error_handler); | |
1155 | ||
e3180499 | 1156 | __ata_port_freeze(ap); |
54c38444 | 1157 | nr_aborted = ata_port_abort(ap); |
e3180499 TH |
1158 | |
1159 | return nr_aborted; | |
1160 | } | |
1161 | ||
7d77b247 TH |
1162 | /** |
1163 | * sata_async_notification - SATA async notification handler | |
1164 | * @ap: ATA port where async notification is received | |
1165 | * | |
1166 | * Handler to be called when async notification via SDB FIS is | |
1167 | * received. This function schedules EH if necessary. | |
1168 | * | |
1169 | * LOCKING: | |
1170 | * spin_lock_irqsave(host lock) | |
1171 | * | |
1172 | * RETURNS: | |
1173 | * 1 if EH is scheduled, 0 otherwise. | |
1174 | */ | |
1175 | int sata_async_notification(struct ata_port *ap) | |
1176 | { | |
1177 | u32 sntf; | |
1178 | int rc; | |
1179 | ||
1180 | if (!(ap->flags & ATA_FLAG_AN)) | |
1181 | return 0; | |
1182 | ||
1183 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
1184 | if (rc == 0) | |
1185 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1186 | ||
071f44b1 | 1187 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1188 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1189 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1190 | /* PMP is not attached. Check whether ATAPI |
1191 | * AN is configured. If so, notify media | |
1192 | * change. | |
1193 | */ | |
1194 | struct ata_device *dev = ap->link.device; | |
1195 | ||
1196 | if ((dev->class == ATA_DEV_ATAPI) && | |
1197 | (dev->flags & ATA_DFLAG_AN)) | |
1198 | ata_scsi_media_change_notify(dev); | |
1199 | return 0; | |
1200 | } else { | |
1201 | /* PMP is attached but SNTF is not available. | |
1202 | * ATAPI async media change notification is | |
1203 | * not used. The PMP must be reporting PHY | |
1204 | * status change, schedule EH. | |
1205 | */ | |
1206 | ata_port_schedule_eh(ap); | |
1207 | return 1; | |
1208 | } | |
1209 | } else { | |
1210 | /* PMP is attached and SNTF is available */ | |
1211 | struct ata_link *link; | |
1212 | ||
1213 | /* check and notify ATAPI AN */ | |
1eca4365 | 1214 | ata_for_each_link(link, ap, EDGE) { |
7d77b247 TH |
1215 | if (!(sntf & (1 << link->pmp))) |
1216 | continue; | |
1217 | ||
1218 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1219 | (link->device->flags & ATA_DFLAG_AN)) | |
1220 | ata_scsi_media_change_notify(link->device); | |
1221 | } | |
1222 | ||
1223 | /* If PMP is reporting that PHY status of some | |
1224 | * downstream ports has changed, schedule EH. | |
1225 | */ | |
1226 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1227 | ata_port_schedule_eh(ap); | |
1228 | return 1; | |
1229 | } | |
1230 | ||
1231 | return 0; | |
1232 | } | |
1233 | } | |
1234 | ||
e3180499 TH |
1235 | /** |
1236 | * ata_eh_freeze_port - EH helper to freeze port | |
1237 | * @ap: ATA port to freeze | |
1238 | * | |
1239 | * Freeze @ap. | |
1240 | * | |
1241 | * LOCKING: | |
1242 | * None. | |
1243 | */ | |
1244 | void ata_eh_freeze_port(struct ata_port *ap) | |
1245 | { | |
1246 | unsigned long flags; | |
1247 | ||
1248 | if (!ap->ops->error_handler) | |
1249 | return; | |
1250 | ||
ba6a1308 | 1251 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1252 | __ata_port_freeze(ap); |
ba6a1308 | 1253 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1254 | } |
1255 | ||
1256 | /** | |
1257 | * ata_port_thaw_port - EH helper to thaw port | |
1258 | * @ap: ATA port to thaw | |
1259 | * | |
1260 | * Thaw frozen port @ap. | |
1261 | * | |
1262 | * LOCKING: | |
1263 | * None. | |
1264 | */ | |
1265 | void ata_eh_thaw_port(struct ata_port *ap) | |
1266 | { | |
1267 | unsigned long flags; | |
1268 | ||
1269 | if (!ap->ops->error_handler) | |
1270 | return; | |
1271 | ||
ba6a1308 | 1272 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1273 | |
b51e9e5d | 1274 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1275 | |
1276 | if (ap->ops->thaw) | |
1277 | ap->ops->thaw(ap); | |
1278 | ||
ba6a1308 | 1279 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1280 | |
44877b4e | 1281 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1282 | } |
1283 | ||
ece1d636 TH |
1284 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1285 | { | |
1286 | /* nada */ | |
1287 | } | |
1288 | ||
1289 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1290 | { | |
1291 | struct ata_port *ap = qc->ap; | |
1292 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1293 | unsigned long flags; | |
1294 | ||
ba6a1308 | 1295 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1296 | qc->scsidone = ata_eh_scsidone; |
1297 | __ata_qc_complete(qc); | |
1298 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1299 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1300 | |
1301 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1302 | } | |
1303 | ||
1304 | /** | |
1305 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1306 | * @qc: Command to complete | |
1307 | * | |
1308 | * Indicate to the mid and upper layers that an ATA command has | |
1309 | * completed. To be used from EH. | |
1310 | */ | |
1311 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1312 | { | |
1313 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1314 | scmd->retries = scmd->allowed; | |
1315 | __ata_eh_qc_complete(qc); | |
1316 | } | |
1317 | ||
1318 | /** | |
1319 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1320 | * @qc: Command to retry | |
1321 | * | |
1322 | * Indicate to the mid and upper layers that an ATA command | |
1323 | * should be retried. To be used from EH. | |
1324 | * | |
1325 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
f13e2201 | 1326 | * scmd->allowed is incremented for commands which get retried |
ece1d636 TH |
1327 | * due to unrelated failures (qc->err_mask is zero). |
1328 | */ | |
1329 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1330 | { | |
1331 | struct scsi_cmnd *scmd = qc->scsicmd; | |
f13e2201 GG |
1332 | if (!qc->err_mask) |
1333 | scmd->allowed++; | |
ece1d636 TH |
1334 | __ata_eh_qc_complete(qc); |
1335 | } | |
022bdb07 | 1336 | |
678afac6 TH |
1337 | /** |
1338 | * ata_dev_disable - disable ATA device | |
1339 | * @dev: ATA device to disable | |
1340 | * | |
1341 | * Disable @dev. | |
1342 | * | |
1343 | * Locking: | |
1344 | * EH context. | |
1345 | */ | |
1346 | void ata_dev_disable(struct ata_device *dev) | |
1347 | { | |
1348 | if (!ata_dev_enabled(dev)) | |
1349 | return; | |
1350 | ||
1351 | if (ata_msg_drv(dev->link->ap)) | |
a9a79dfe | 1352 | ata_dev_warn(dev, "disabled\n"); |
678afac6 TH |
1353 | ata_acpi_on_disable(dev); |
1354 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1355 | dev->class++; | |
99cf610a TH |
1356 | |
1357 | /* From now till the next successful probe, ering is used to | |
1358 | * track probe failures. Clear accumulated device error info. | |
1359 | */ | |
1360 | ata_ering_clear(&dev->ering); | |
678afac6 TH |
1361 | } |
1362 | ||
0ea035a3 TH |
1363 | /** |
1364 | * ata_eh_detach_dev - detach ATA device | |
1365 | * @dev: ATA device to detach | |
1366 | * | |
1367 | * Detach @dev. | |
1368 | * | |
1369 | * LOCKING: | |
1370 | * None. | |
1371 | */ | |
fb7fd614 | 1372 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1373 | { |
f58229f8 TH |
1374 | struct ata_link *link = dev->link; |
1375 | struct ata_port *ap = link->ap; | |
90484ebf | 1376 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1377 | unsigned long flags; |
1378 | ||
1379 | ata_dev_disable(dev); | |
1380 | ||
ba6a1308 | 1381 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1382 | |
1383 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1384 | ||
1385 | if (ata_scsi_offline_dev(dev)) { | |
1386 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1387 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1388 | } |
1389 | ||
90484ebf | 1390 | /* clear per-dev EH info */ |
f58229f8 TH |
1391 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1392 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1393 | ehc->saved_xfer_mode[dev->devno] = 0; |
1394 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1395 | |
ba6a1308 | 1396 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1397 | } |
1398 | ||
022bdb07 TH |
1399 | /** |
1400 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1401 | * @link: target ATA link |
47005f25 | 1402 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1403 | * @action: action about to be performed |
1404 | * | |
1405 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1406 | * in @link->eh_info such that eh actions are not unnecessarily |
1407 | * repeated. | |
022bdb07 TH |
1408 | * |
1409 | * LOCKING: | |
1410 | * None. | |
1411 | */ | |
fb7fd614 TH |
1412 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1413 | unsigned int action) | |
022bdb07 | 1414 | { |
955e57df TH |
1415 | struct ata_port *ap = link->ap; |
1416 | struct ata_eh_info *ehi = &link->eh_info; | |
1417 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1418 | unsigned long flags; |
1419 | ||
ba6a1308 | 1420 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1421 | |
955e57df | 1422 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1423 | |
a568d1d2 TH |
1424 | /* About to take EH action, set RECOVERED. Ignore actions on |
1425 | * slave links as master will do them again. | |
1426 | */ | |
1427 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1428 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1429 | ||
ba6a1308 | 1430 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1431 | } |
1432 | ||
47005f25 TH |
1433 | /** |
1434 | * ata_eh_done - EH action complete | |
955e57df | 1435 | * @ap: target ATA port |
47005f25 TH |
1436 | * @dev: target ATA dev for per-dev action (can be NULL) |
1437 | * @action: action just completed | |
1438 | * | |
1439 | * Called right after performing EH actions to clear related bits | |
955e57df | 1440 | * in @link->eh_context. |
47005f25 TH |
1441 | * |
1442 | * LOCKING: | |
1443 | * None. | |
1444 | */ | |
fb7fd614 TH |
1445 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1446 | unsigned int action) | |
47005f25 | 1447 | { |
955e57df | 1448 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1449 | |
955e57df | 1450 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1451 | } |
1452 | ||
022bdb07 TH |
1453 | /** |
1454 | * ata_err_string - convert err_mask to descriptive string | |
1455 | * @err_mask: error mask to convert to string | |
1456 | * | |
1457 | * Convert @err_mask to descriptive string. Errors are | |
1458 | * prioritized according to severity and only the most severe | |
1459 | * error is reported. | |
1460 | * | |
1461 | * LOCKING: | |
1462 | * None. | |
1463 | * | |
1464 | * RETURNS: | |
1465 | * Descriptive string for @err_mask | |
1466 | */ | |
2dcb407e | 1467 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1468 | { |
1469 | if (err_mask & AC_ERR_HOST_BUS) | |
1470 | return "host bus error"; | |
1471 | if (err_mask & AC_ERR_ATA_BUS) | |
1472 | return "ATA bus error"; | |
1473 | if (err_mask & AC_ERR_TIMEOUT) | |
1474 | return "timeout"; | |
1475 | if (err_mask & AC_ERR_HSM) | |
1476 | return "HSM violation"; | |
1477 | if (err_mask & AC_ERR_SYSTEM) | |
1478 | return "internal error"; | |
1479 | if (err_mask & AC_ERR_MEDIA) | |
1480 | return "media error"; | |
1481 | if (err_mask & AC_ERR_INVALID) | |
1482 | return "invalid argument"; | |
1483 | if (err_mask & AC_ERR_DEV) | |
1484 | return "device error"; | |
1485 | return "unknown error"; | |
1486 | } | |
1487 | ||
e8ee8451 TH |
1488 | /** |
1489 | * ata_read_log_page - read a specific log page | |
1490 | * @dev: target device | |
65fe1f0f | 1491 | * @log: log to read |
e8ee8451 TH |
1492 | * @page: page to read |
1493 | * @buf: buffer to store read page | |
1494 | * @sectors: number of sectors to read | |
1495 | * | |
1496 | * Read log page using READ_LOG_EXT command. | |
1497 | * | |
1498 | * LOCKING: | |
1499 | * Kernel thread context (may sleep). | |
1500 | * | |
1501 | * RETURNS: | |
1502 | * 0 on success, AC_ERR_* mask otherwise. | |
1503 | */ | |
65fe1f0f SH |
1504 | unsigned int ata_read_log_page(struct ata_device *dev, u8 log, |
1505 | u8 page, void *buf, unsigned int sectors) | |
e8ee8451 TH |
1506 | { |
1507 | struct ata_taskfile tf; | |
1508 | unsigned int err_mask; | |
1509 | ||
65fe1f0f | 1510 | DPRINTK("read log page - log 0x%x, page 0x%x\n", log, page); |
e8ee8451 TH |
1511 | |
1512 | ata_tf_init(dev, &tf); | |
1513 | tf.command = ATA_CMD_READ_LOG_EXT; | |
65fe1f0f SH |
1514 | tf.lbal = log; |
1515 | tf.lbam = page; | |
e8ee8451 TH |
1516 | tf.nsect = sectors; |
1517 | tf.hob_nsect = sectors >> 8; | |
1518 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
1519 | tf.protocol = ATA_PROT_PIO; | |
1520 | ||
1521 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1522 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 TH |
1523 | |
1524 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
1525 | return err_mask; | |
1526 | } | |
1527 | ||
1528 | /** | |
1529 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1530 | * @dev: Device to read log page 10h from | |
1531 | * @tag: Resulting tag of the failed command | |
1532 | * @tf: Resulting taskfile registers of the failed command | |
1533 | * | |
1534 | * Read log page 10h to obtain NCQ error details and clear error | |
1535 | * condition. | |
1536 | * | |
1537 | * LOCKING: | |
1538 | * Kernel thread context (may sleep). | |
1539 | * | |
1540 | * RETURNS: | |
1541 | * 0 on success, -errno otherwise. | |
1542 | */ | |
1543 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1544 | int *tag, struct ata_taskfile *tf) | |
1545 | { | |
9af5c9c9 | 1546 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1547 | unsigned int err_mask; |
1548 | u8 csum; | |
1549 | int i; | |
1550 | ||
65fe1f0f | 1551 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, 0, buf, 1); |
e8ee8451 TH |
1552 | if (err_mask) |
1553 | return -EIO; | |
1554 | ||
1555 | csum = 0; | |
1556 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1557 | csum += buf[i]; | |
1558 | if (csum) | |
a9a79dfe JP |
1559 | ata_dev_warn(dev, "invalid checksum 0x%x on log page 10h\n", |
1560 | csum); | |
e8ee8451 TH |
1561 | |
1562 | if (buf[0] & 0x80) | |
1563 | return -ENOENT; | |
1564 | ||
1565 | *tag = buf[0] & 0x1f; | |
1566 | ||
1567 | tf->command = buf[2]; | |
1568 | tf->feature = buf[3]; | |
1569 | tf->lbal = buf[4]; | |
1570 | tf->lbam = buf[5]; | |
1571 | tf->lbah = buf[6]; | |
1572 | tf->device = buf[7]; | |
1573 | tf->hob_lbal = buf[8]; | |
1574 | tf->hob_lbam = buf[9]; | |
1575 | tf->hob_lbah = buf[10]; | |
1576 | tf->nsect = buf[12]; | |
1577 | tf->hob_nsect = buf[13]; | |
1578 | ||
1579 | return 0; | |
1580 | } | |
1581 | ||
11fc33da TH |
1582 | /** |
1583 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1584 | * @dev: target ATAPI device | |
1585 | * @r_sense_key: out parameter for sense_key | |
1586 | * | |
1587 | * Perform ATAPI TEST_UNIT_READY. | |
1588 | * | |
1589 | * LOCKING: | |
1590 | * EH context (may sleep). | |
1591 | * | |
1592 | * RETURNS: | |
1593 | * 0 on success, AC_ERR_* mask on failure. | |
1594 | */ | |
3dc67440 | 1595 | unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) |
11fc33da TH |
1596 | { |
1597 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1598 | struct ata_taskfile tf; | |
1599 | unsigned int err_mask; | |
1600 | ||
1601 | ata_tf_init(dev, &tf); | |
1602 | ||
1603 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1604 | tf.command = ATA_CMD_PACKET; | |
1605 | tf.protocol = ATAPI_PROT_NODATA; | |
1606 | ||
1607 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1608 | if (err_mask == AC_ERR_DEV) | |
1609 | *r_sense_key = tf.feature >> 4; | |
1610 | return err_mask; | |
1611 | } | |
1612 | ||
022bdb07 TH |
1613 | /** |
1614 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1615 | * @dev: device to perform REQUEST_SENSE to | |
1616 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1617 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1618 | * |
1619 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1620 | * SENSE. This function is EH helper. | |
1621 | * | |
1622 | * LOCKING: | |
1623 | * Kernel thread context (may sleep). | |
1624 | * | |
1625 | * RETURNS: | |
1626 | * 0 on success, AC_ERR_* mask on failure | |
1627 | */ | |
3dc67440 | 1628 | unsigned int atapi_eh_request_sense(struct ata_device *dev, |
3eabddb8 | 1629 | u8 *sense_buf, u8 dfl_sense_key) |
022bdb07 | 1630 | { |
3eabddb8 TH |
1631 | u8 cdb[ATAPI_CDB_LEN] = |
1632 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1633 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1634 | struct ata_taskfile tf; |
022bdb07 TH |
1635 | |
1636 | DPRINTK("ATAPI request sense\n"); | |
1637 | ||
022bdb07 TH |
1638 | /* FIXME: is this needed? */ |
1639 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
1640 | ||
56287768 AL |
1641 | /* initialize sense_buf with the error register, |
1642 | * for the case where they are -not- overwritten | |
1643 | */ | |
022bdb07 | 1644 | sense_buf[0] = 0x70; |
3eabddb8 | 1645 | sense_buf[2] = dfl_sense_key; |
56287768 | 1646 | |
a617c09f | 1647 | /* some devices time out if garbage left in tf */ |
56287768 | 1648 | ata_tf_init(dev, &tf); |
022bdb07 | 1649 | |
022bdb07 TH |
1650 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1651 | tf.command = ATA_CMD_PACKET; | |
1652 | ||
1653 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1654 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1655 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1656 | tf.feature |= ATAPI_PKT_DMA; |
1657 | } else { | |
0dc36888 | 1658 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1659 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1660 | tf.lbah = 0; | |
022bdb07 TH |
1661 | } |
1662 | ||
1663 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1664 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1665 | } |
1666 | ||
1667 | /** | |
1668 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1669 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1670 | * |
1671 | * Analyze SError if available and further determine cause of | |
1672 | * failure. | |
1673 | * | |
1674 | * LOCKING: | |
1675 | * None. | |
1676 | */ | |
0260731f | 1677 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1678 | { |
0260731f | 1679 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1680 | u32 serror = ehc->i.serror; |
1681 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1682 | u32 hotplug_mask; |
022bdb07 | 1683 | |
e0614db2 | 1684 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1685 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1686 | action |= ATA_EH_RESET; |
022bdb07 TH |
1687 | } |
1688 | if (serror & SERR_PROTOCOL) { | |
1689 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1690 | action |= ATA_EH_RESET; |
022bdb07 TH |
1691 | } |
1692 | if (serror & SERR_INTERNAL) { | |
1693 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1694 | action |= ATA_EH_RESET; |
022bdb07 | 1695 | } |
f9df58cb TH |
1696 | |
1697 | /* Determine whether a hotplug event has occurred. Both | |
1698 | * SError.N/X are considered hotplug events for enabled or | |
1699 | * host links. For disabled PMP links, only N bit is | |
1700 | * considered as X bit is left at 1 for link plugging. | |
1701 | */ | |
eb0e85e3 | 1702 | if (link->lpm_policy > ATA_LPM_MAX_POWER) |
6b7ae954 TH |
1703 | hotplug_mask = 0; /* hotplug doesn't work w/ LPM */ |
1704 | else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
f9df58cb TH |
1705 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
1706 | else | |
1707 | hotplug_mask = SERR_PHYRDY_CHG; | |
1708 | ||
1709 | if (serror & hotplug_mask) | |
084fe639 | 1710 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1711 | |
1712 | ehc->i.err_mask |= err_mask; | |
1713 | ehc->i.action |= action; | |
1714 | } | |
1715 | ||
e8ee8451 TH |
1716 | /** |
1717 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1718 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1719 | * |
1720 | * Read log page 10h, determine the offending qc and acquire | |
1721 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1722 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1723 | * care of the rest. | |
1724 | * | |
1725 | * LOCKING: | |
1726 | * Kernel thread context (may sleep). | |
1727 | */ | |
10acf3b0 | 1728 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1729 | { |
0260731f TH |
1730 | struct ata_port *ap = link->ap; |
1731 | struct ata_eh_context *ehc = &link->eh_context; | |
1732 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1733 | struct ata_queued_cmd *qc; |
1734 | struct ata_taskfile tf; | |
1735 | int tag, rc; | |
1736 | ||
1737 | /* if frozen, we can't do much */ | |
b51e9e5d | 1738 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1739 | return; |
1740 | ||
1741 | /* is it NCQ device error? */ | |
0260731f | 1742 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1743 | return; |
1744 | ||
1745 | /* has LLDD analyzed already? */ | |
1746 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1747 | qc = __ata_qc_from_tag(ap, tag); | |
1748 | ||
1749 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1750 | continue; | |
1751 | ||
1752 | if (qc->err_mask) | |
1753 | return; | |
1754 | } | |
1755 | ||
1756 | /* okay, this error is ours */ | |
a09bf4cd | 1757 | memset(&tf, 0, sizeof(tf)); |
e8ee8451 TH |
1758 | rc = ata_eh_read_log_10h(dev, &tag, &tf); |
1759 | if (rc) { | |
a9a79dfe JP |
1760 | ata_link_err(link, "failed to read log page 10h (errno=%d)\n", |
1761 | rc); | |
e8ee8451 TH |
1762 | return; |
1763 | } | |
1764 | ||
0260731f | 1765 | if (!(link->sactive & (1 << tag))) { |
a9a79dfe JP |
1766 | ata_link_err(link, "log page 10h reported inactive tag %d\n", |
1767 | tag); | |
e8ee8451 TH |
1768 | return; |
1769 | } | |
1770 | ||
1771 | /* we've got the perpetrator, condemn it */ | |
1772 | qc = __ata_qc_from_tag(ap, tag); | |
1773 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1774 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1775 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
e8ee8451 TH |
1776 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1777 | } | |
1778 | ||
022bdb07 TH |
1779 | /** |
1780 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1781 | * @qc: qc to analyze | |
1782 | * @tf: Taskfile registers to analyze | |
1783 | * | |
1784 | * Analyze taskfile of @qc and further determine cause of | |
1785 | * failure. This function also requests ATAPI sense data if | |
25985edc | 1786 | * available. |
022bdb07 TH |
1787 | * |
1788 | * LOCKING: | |
1789 | * Kernel thread context (may sleep). | |
1790 | * | |
1791 | * RETURNS: | |
1792 | * Determined recovery action | |
1793 | */ | |
1794 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1795 | const struct ata_taskfile *tf) | |
1796 | { | |
1797 | unsigned int tmp, action = 0; | |
1798 | u8 stat = tf->command, err = tf->feature; | |
1799 | ||
1800 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1801 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1802 | return ATA_EH_RESET; |
022bdb07 TH |
1803 | } |
1804 | ||
a51d644a TH |
1805 | if (stat & (ATA_ERR | ATA_DF)) |
1806 | qc->err_mask |= AC_ERR_DEV; | |
1807 | else | |
022bdb07 TH |
1808 | return 0; |
1809 | ||
1810 | switch (qc->dev->class) { | |
1811 | case ATA_DEV_ATA: | |
1812 | if (err & ATA_ICRC) | |
1813 | qc->err_mask |= AC_ERR_ATA_BUS; | |
eec7e1c1 | 1814 | if (err & (ATA_UNC | ATA_AMNF)) |
022bdb07 TH |
1815 | qc->err_mask |= AC_ERR_MEDIA; |
1816 | if (err & ATA_IDNF) | |
1817 | qc->err_mask |= AC_ERR_INVALID; | |
1818 | break; | |
1819 | ||
1820 | case ATA_DEV_ATAPI: | |
a569a30d | 1821 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1822 | tmp = atapi_eh_request_sense(qc->dev, |
1823 | qc->scsicmd->sense_buffer, | |
1824 | qc->result_tf.feature >> 4); | |
a569a30d TH |
1825 | if (!tmp) { |
1826 | /* ATA_QCFLAG_SENSE_VALID is used to | |
1827 | * tell atapi_qc_complete() that sense | |
1828 | * data is already valid. | |
1829 | * | |
1830 | * TODO: interpret sense data and set | |
1831 | * appropriate err_mask. | |
1832 | */ | |
1833 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
1834 | } else | |
1835 | qc->err_mask |= tmp; | |
1836 | } | |
022bdb07 TH |
1837 | } |
1838 | ||
1839 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) | |
cf480626 | 1840 | action |= ATA_EH_RESET; |
022bdb07 TH |
1841 | |
1842 | return action; | |
1843 | } | |
1844 | ||
76326ac1 TH |
1845 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1846 | int *xfer_ok) | |
022bdb07 | 1847 | { |
76326ac1 TH |
1848 | int base = 0; |
1849 | ||
1850 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1851 | *xfer_ok = 1; | |
1852 | ||
1853 | if (!*xfer_ok) | |
75f9cafc | 1854 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1855 | |
7d47e8d4 | 1856 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1857 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1858 | |
7d47e8d4 | 1859 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1860 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1861 | |
3884f7b0 | 1862 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1863 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1864 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1865 | if ((err_mask & |
1866 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1867 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1868 | } |
1869 | ||
1870 | return 0; | |
1871 | } | |
1872 | ||
7d47e8d4 | 1873 | struct speed_down_verdict_arg { |
022bdb07 | 1874 | u64 since; |
76326ac1 | 1875 | int xfer_ok; |
3884f7b0 | 1876 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1877 | }; |
1878 | ||
7d47e8d4 | 1879 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1880 | { |
7d47e8d4 | 1881 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1882 | int cat; |
022bdb07 | 1883 | |
d9027470 | 1884 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since)) |
022bdb07 TH |
1885 | return -1; |
1886 | ||
76326ac1 TH |
1887 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1888 | &arg->xfer_ok); | |
7d47e8d4 | 1889 | arg->nr_errors[cat]++; |
76326ac1 | 1890 | |
022bdb07 TH |
1891 | return 0; |
1892 | } | |
1893 | ||
1894 | /** | |
7d47e8d4 | 1895 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1896 | * @dev: Device of interest |
1897 | * | |
1898 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1899 | * whether NCQ needs to be turned off, transfer speed should be |
1900 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1901 | * |
3884f7b0 TH |
1902 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1903 | * | |
1904 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1905 | * IO commands | |
1906 | * | |
1907 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1908 | * | |
76326ac1 TH |
1909 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1910 | * data transfer hasn't been verified. | |
1911 | * | |
3884f7b0 TH |
1912 | * Verdicts are |
1913 | * | |
1914 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1915 | * |
3884f7b0 TH |
1916 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1917 | * to PIO. | |
7d47e8d4 | 1918 | * |
3884f7b0 | 1919 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1920 | * |
3884f7b0 | 1921 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1922 | * taken per error. An action triggered by non-DUBIOUS errors |
1923 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1924 | * This is to expedite speed down decisions right after device is | |
1925 | * initially configured. | |
1926 | * | |
1927 | * The followings are speed down rules. #1 and #2 deal with | |
1928 | * DUBIOUS errors. | |
7d47e8d4 | 1929 | * |
76326ac1 TH |
1930 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1931 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1932 | * | |
1933 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1934 | * occurred during last 5 mins, NCQ_OFF. | |
1935 | * | |
1936 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
25985edc | 1937 | * occurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1938 | * |
76326ac1 | 1939 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1940 | * during last 10 mins, NCQ_OFF. |
1941 | * | |
76326ac1 | 1942 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1943 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1944 | * |
022bdb07 TH |
1945 | * LOCKING: |
1946 | * Inherited from caller. | |
1947 | * | |
1948 | * RETURNS: | |
7d47e8d4 | 1949 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1950 | */ |
7d47e8d4 | 1951 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1952 | { |
7d47e8d4 TH |
1953 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1954 | u64 j64 = get_jiffies_64(); | |
1955 | struct speed_down_verdict_arg arg; | |
1956 | unsigned int verdict = 0; | |
022bdb07 | 1957 | |
3884f7b0 | 1958 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1959 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1960 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1961 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1962 | |
76326ac1 TH |
1963 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1964 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1965 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1966 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1967 | ||
1968 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1969 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1970 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1971 | ||
3884f7b0 TH |
1972 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1973 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1974 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1975 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1976 | |
3884f7b0 | 1977 | /* scan past 10 mins of error history */ |
022bdb07 | 1978 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1979 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1980 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1981 | |
3884f7b0 TH |
1982 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1983 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1984 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1985 | ||
1986 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1987 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1988 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1989 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1990 | |
7d47e8d4 | 1991 | return verdict; |
022bdb07 TH |
1992 | } |
1993 | ||
1994 | /** | |
1995 | * ata_eh_speed_down - record error and speed down if necessary | |
1996 | * @dev: Failed device | |
3884f7b0 | 1997 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1998 | * @err_mask: err_mask of the error |
1999 | * | |
2000 | * Record error and examine error history to determine whether | |
2001 | * adjusting transmission speed is necessary. It also sets | |
2002 | * transmission limits appropriately if such adjustment is | |
2003 | * necessary. | |
2004 | * | |
2005 | * LOCKING: | |
2006 | * Kernel thread context (may sleep). | |
2007 | * | |
2008 | * RETURNS: | |
7d47e8d4 | 2009 | * Determined recovery action. |
022bdb07 | 2010 | */ |
3884f7b0 TH |
2011 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
2012 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 2013 | { |
b1c72916 | 2014 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 2015 | int xfer_ok = 0; |
7d47e8d4 TH |
2016 | unsigned int verdict; |
2017 | unsigned int action = 0; | |
2018 | ||
2019 | /* don't bother if Cat-0 error */ | |
76326ac1 | 2020 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
2021 | return 0; |
2022 | ||
2023 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 2024 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 2025 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 2026 | |
7d47e8d4 TH |
2027 | /* turn off NCQ? */ |
2028 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
2029 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
2030 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
2031 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
a9a79dfe | 2032 | ata_dev_warn(dev, "NCQ disabled due to excessive errors\n"); |
7d47e8d4 TH |
2033 | goto done; |
2034 | } | |
022bdb07 | 2035 | |
7d47e8d4 TH |
2036 | /* speed down? */ |
2037 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
2038 | /* speed down SATA link speed if possible */ | |
a07d499b | 2039 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 2040 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2041 | goto done; |
2042 | } | |
022bdb07 | 2043 | |
7d47e8d4 TH |
2044 | /* lower transfer mode */ |
2045 | if (dev->spdn_cnt < 2) { | |
2046 | static const int dma_dnxfer_sel[] = | |
2047 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
2048 | static const int pio_dnxfer_sel[] = | |
2049 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
2050 | int sel; | |
2051 | ||
2052 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
2053 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
2054 | else | |
2055 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
2056 | ||
2057 | dev->spdn_cnt++; | |
2058 | ||
2059 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 2060 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2061 | goto done; |
2062 | } | |
2063 | } | |
2064 | } | |
2065 | ||
2066 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 2067 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
2068 | */ |
2069 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 2070 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
2071 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
2072 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
2073 | dev->spdn_cnt = 0; | |
cf480626 | 2074 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2075 | goto done; |
2076 | } | |
2077 | } | |
022bdb07 | 2078 | |
022bdb07 | 2079 | return 0; |
7d47e8d4 TH |
2080 | done: |
2081 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
2082 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
2083 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 2084 | return action; |
022bdb07 TH |
2085 | } |
2086 | ||
8d899e70 ML |
2087 | /** |
2088 | * ata_eh_worth_retry - analyze error and decide whether to retry | |
2089 | * @qc: qc to possibly retry | |
2090 | * | |
2091 | * Look at the cause of the error and decide if a retry | |
2092 | * might be useful or not. We don't want to retry media errors | |
2093 | * because the drive itself has probably already taken 10-30 seconds | |
2094 | * doing its own internal retries before reporting the failure. | |
2095 | */ | |
2096 | static inline int ata_eh_worth_retry(struct ata_queued_cmd *qc) | |
2097 | { | |
1eaca39a | 2098 | if (qc->err_mask & AC_ERR_MEDIA) |
8d899e70 ML |
2099 | return 0; /* don't retry media errors */ |
2100 | if (qc->flags & ATA_QCFLAG_IO) | |
2101 | return 1; /* otherwise retry anything from fs stack */ | |
2102 | if (qc->err_mask & AC_ERR_INVALID) | |
2103 | return 0; /* don't retry these */ | |
2104 | return qc->err_mask != AC_ERR_DEV; /* retry if not dev error */ | |
2105 | } | |
2106 | ||
022bdb07 | 2107 | /** |
9b1e2658 TH |
2108 | * ata_eh_link_autopsy - analyze error and determine recovery action |
2109 | * @link: host link to perform autopsy on | |
022bdb07 | 2110 | * |
0260731f TH |
2111 | * Analyze why @link failed and determine which recovery actions |
2112 | * are needed. This function also sets more detailed AC_ERR_* | |
2113 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
2114 | * |
2115 | * LOCKING: | |
2116 | * Kernel thread context (may sleep). | |
2117 | */ | |
9b1e2658 | 2118 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 2119 | { |
0260731f | 2120 | struct ata_port *ap = link->ap; |
936fd732 | 2121 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 2122 | struct ata_device *dev; |
3884f7b0 TH |
2123 | unsigned int all_err_mask = 0, eflags = 0; |
2124 | int tag; | |
022bdb07 TH |
2125 | u32 serror; |
2126 | int rc; | |
2127 | ||
2128 | DPRINTK("ENTER\n"); | |
2129 | ||
1cdaf534 TH |
2130 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
2131 | return; | |
2132 | ||
022bdb07 | 2133 | /* obtain and analyze SError */ |
936fd732 | 2134 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
2135 | if (rc == 0) { |
2136 | ehc->i.serror |= serror; | |
0260731f | 2137 | ata_eh_analyze_serror(link); |
4e57c517 | 2138 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 2139 | /* SError read failed, force reset and probing */ |
b558eddd | 2140 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 2141 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
2142 | ehc->i.err_mask |= AC_ERR_OTHER; |
2143 | } | |
022bdb07 | 2144 | |
e8ee8451 | 2145 | /* analyze NCQ failure */ |
0260731f | 2146 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 2147 | |
022bdb07 TH |
2148 | /* any real error trumps AC_ERR_OTHER */ |
2149 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
2150 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
2151 | ||
2152 | all_err_mask |= ehc->i.err_mask; | |
2153 | ||
2154 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2155 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2156 | ||
b1c72916 TH |
2157 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2158 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
2159 | continue; |
2160 | ||
2161 | /* inherit upper level err_mask */ | |
2162 | qc->err_mask |= ehc->i.err_mask; | |
2163 | ||
022bdb07 | 2164 | /* analyze TF */ |
4528e4da | 2165 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
2166 | |
2167 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
2168 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
2169 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
2170 | AC_ERR_INVALID); | |
2171 | ||
2172 | /* any real error trumps unknown error */ | |
2173 | if (qc->err_mask & ~AC_ERR_OTHER) | |
2174 | qc->err_mask &= ~AC_ERR_OTHER; | |
2175 | ||
2176 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 2177 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 2178 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 | 2179 | |
03faab78 | 2180 | /* determine whether the command is worth retrying */ |
8d899e70 | 2181 | if (ata_eh_worth_retry(qc)) |
03faab78 TH |
2182 | qc->flags |= ATA_QCFLAG_RETRY; |
2183 | ||
022bdb07 | 2184 | /* accumulate error info */ |
4528e4da | 2185 | ehc->i.dev = qc->dev; |
022bdb07 TH |
2186 | all_err_mask |= qc->err_mask; |
2187 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 2188 | eflags |= ATA_EFLAG_IS_IO; |
022bdb07 TH |
2189 | } |
2190 | ||
a20f33ff | 2191 | /* enforce default EH actions */ |
b51e9e5d | 2192 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 2193 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2194 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2195 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2196 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2197 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2198 | |
dfcc173d TH |
2199 | /* If we have offending qcs and the associated failed device, |
2200 | * perform per-dev EH action only on the offending device. | |
2201 | */ | |
4528e4da | 2202 | if (ehc->i.dev) { |
4528e4da TH |
2203 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2204 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2205 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2206 | } |
2207 | ||
2695e366 TH |
2208 | /* propagate timeout to host link */ |
2209 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2210 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2211 | ||
2212 | /* record error and consider speeding down */ | |
dfcc173d | 2213 | dev = ehc->i.dev; |
2695e366 TH |
2214 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2215 | ata_dev_enabled(link->device)))) | |
2216 | dev = link->device; | |
dfcc173d | 2217 | |
76326ac1 TH |
2218 | if (dev) { |
2219 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2220 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2221 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 2222 | } |
dfcc173d | 2223 | |
022bdb07 TH |
2224 | DPRINTK("EXIT\n"); |
2225 | } | |
2226 | ||
2227 | /** | |
9b1e2658 TH |
2228 | * ata_eh_autopsy - analyze error and determine recovery action |
2229 | * @ap: host port to perform autopsy on | |
2230 | * | |
2231 | * Analyze all links of @ap and determine why they failed and | |
2232 | * which recovery actions are needed. | |
2233 | * | |
2234 | * LOCKING: | |
2235 | * Kernel thread context (may sleep). | |
2236 | */ | |
fb7fd614 | 2237 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2238 | { |
2239 | struct ata_link *link; | |
2240 | ||
1eca4365 | 2241 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2242 | ata_eh_link_autopsy(link); |
2695e366 | 2243 | |
b1c72916 TH |
2244 | /* Handle the frigging slave link. Autopsy is done similarly |
2245 | * but actions and flags are transferred over to the master | |
2246 | * link and handled from there. | |
2247 | */ | |
2248 | if (ap->slave_link) { | |
2249 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2250 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2251 | ||
848e4c68 TH |
2252 | /* transfer control flags from master to slave */ |
2253 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2254 | ||
2255 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2256 | ata_eh_link_autopsy(ap->slave_link); |
2257 | ||
848e4c68 | 2258 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2259 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2260 | mehc->i.action |= sehc->i.action; | |
2261 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2262 | mehc->i.flags |= sehc->i.flags; | |
2263 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2264 | } | |
2265 | ||
2695e366 TH |
2266 | /* Autopsy of fanout ports can affect host link autopsy. |
2267 | * Perform host link autopsy last. | |
2268 | */ | |
071f44b1 | 2269 | if (sata_pmp_attached(ap)) |
2695e366 | 2270 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2271 | } |
2272 | ||
6521148c RH |
2273 | /** |
2274 | * ata_get_cmd_descript - get description for ATA command | |
2275 | * @command: ATA command code to get description for | |
2276 | * | |
2277 | * Return a textual description of the given command, or NULL if the | |
2278 | * command is not known. | |
2279 | * | |
2280 | * LOCKING: | |
2281 | * None | |
2282 | */ | |
2283 | const char *ata_get_cmd_descript(u8 command) | |
2284 | { | |
2285 | #ifdef CONFIG_ATA_VERBOSE_ERROR | |
2286 | static const struct | |
2287 | { | |
2288 | u8 command; | |
2289 | const char *text; | |
2290 | } cmd_descr[] = { | |
2291 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, | |
2292 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, | |
2293 | { ATA_CMD_STANDBY, "STANDBY" }, | |
2294 | { ATA_CMD_IDLE, "IDLE" }, | |
2295 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, | |
2296 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, | |
3915c3b5 | 2297 | { ATA_CMD_DOWNLOAD_MICRO_DMA, "DOWNLOAD MICROCODE DMA" }, |
6521148c RH |
2298 | { ATA_CMD_NOP, "NOP" }, |
2299 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, | |
2300 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, | |
2301 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, | |
2302 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, | |
2303 | { ATA_CMD_SERVICE, "SERVICE" }, | |
2304 | { ATA_CMD_READ, "READ DMA" }, | |
2305 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, | |
2306 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, | |
2307 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, | |
2308 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, | |
2309 | { ATA_CMD_WRITE, "WRITE DMA" }, | |
2310 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, | |
2311 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, | |
2312 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, | |
2313 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, | |
2314 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, | |
2315 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, | |
2316 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, | |
2317 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, | |
3915c3b5 RH |
2318 | { ATA_CMD_FPDMA_SEND, "SEND FPDMA QUEUED" }, |
2319 | { ATA_CMD_FPDMA_RECV, "RECEIVE FPDMA QUEUED" }, | |
6521148c RH |
2320 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, |
2321 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, | |
2322 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, | |
2323 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, | |
2324 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, | |
2325 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, | |
2326 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, | |
2327 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, | |
2328 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, | |
2329 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, | |
2330 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, | |
2331 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, | |
2332 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, | |
2333 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, | |
2334 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, | |
2335 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, | |
2336 | { ATA_CMD_SLEEP, "SLEEP" }, | |
2337 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, | |
2338 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, | |
2339 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, | |
2340 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, | |
2341 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, | |
2342 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, | |
2343 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, | |
2344 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, | |
2345 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, | |
3915c3b5 | 2346 | { ATA_CMD_TRUSTED_NONDATA, "TRUSTED NON-DATA" }, |
6521148c RH |
2347 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, |
2348 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, | |
2349 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, | |
2350 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, | |
2351 | { ATA_CMD_PMP_READ, "READ BUFFER" }, | |
3915c3b5 | 2352 | { ATA_CMD_PMP_READ_DMA, "READ BUFFER DMA" }, |
6521148c | 2353 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, |
3915c3b5 | 2354 | { ATA_CMD_PMP_WRITE_DMA, "WRITE BUFFER DMA" }, |
6521148c RH |
2355 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, |
2356 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, | |
2357 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, | |
2358 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, | |
2359 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, | |
2360 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, | |
2361 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, | |
2362 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, | |
2363 | { ATA_CMD_SMART, "SMART" }, | |
2364 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, | |
2365 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, | |
acad7627 | 2366 | { ATA_CMD_DSM, "DATA SET MANAGEMENT" }, |
6521148c RH |
2367 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, |
2368 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, | |
2369 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, | |
2370 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, | |
2371 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, | |
2372 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, | |
3915c3b5 RH |
2373 | { ATA_CMD_REQ_SENSE_DATA, "REQUEST SENSE DATA EXT" }, |
2374 | { ATA_CMD_SANITIZE_DEVICE, "SANITIZE DEVICE" }, | |
6521148c RH |
2375 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, |
2376 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, | |
2377 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, | |
2378 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, | |
2379 | { ATA_CMD_RESTORE, "RECALIBRATE" }, | |
2380 | { 0, NULL } /* terminate list */ | |
2381 | }; | |
2382 | ||
2383 | unsigned int i; | |
2384 | for (i = 0; cmd_descr[i].text; i++) | |
2385 | if (cmd_descr[i].command == command) | |
2386 | return cmd_descr[i].text; | |
2387 | #endif | |
2388 | ||
2389 | return NULL; | |
2390 | } | |
2391 | ||
9b1e2658 TH |
2392 | /** |
2393 | * ata_eh_link_report - report error handling to user | |
0260731f | 2394 | * @link: ATA link EH is going on |
022bdb07 TH |
2395 | * |
2396 | * Report EH to user. | |
2397 | * | |
2398 | * LOCKING: | |
2399 | * None. | |
2400 | */ | |
9b1e2658 | 2401 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2402 | { |
0260731f TH |
2403 | struct ata_port *ap = link->ap; |
2404 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2405 | const char *frozen, *desc; |
462098b0 | 2406 | char tries_buf[6] = ""; |
022bdb07 TH |
2407 | int tag, nr_failed = 0; |
2408 | ||
94ff3d54 TH |
2409 | if (ehc->i.flags & ATA_EHI_QUIET) |
2410 | return; | |
2411 | ||
022bdb07 TH |
2412 | desc = NULL; |
2413 | if (ehc->i.desc[0] != '\0') | |
2414 | desc = ehc->i.desc; | |
2415 | ||
2416 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2417 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2418 | ||
b1c72916 TH |
2419 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2420 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2421 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2422 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2423 | continue; |
2424 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2425 | continue; | |
2426 | ||
2427 | nr_failed++; | |
2428 | } | |
2429 | ||
2430 | if (!nr_failed && !ehc->i.err_mask) | |
2431 | return; | |
2432 | ||
2433 | frozen = ""; | |
b51e9e5d | 2434 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2435 | frozen = " frozen"; |
2436 | ||
a1e10f7e | 2437 | if (ap->eh_tries < ATA_EH_MAX_TRIES) |
462098b0 | 2438 | snprintf(tries_buf, sizeof(tries_buf), " t%d", |
a1e10f7e TH |
2439 | ap->eh_tries); |
2440 | ||
022bdb07 | 2441 | if (ehc->i.dev) { |
a9a79dfe JP |
2442 | ata_dev_err(ehc->i.dev, "exception Emask 0x%x " |
2443 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2444 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2445 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2446 | if (desc) |
a9a79dfe | 2447 | ata_dev_err(ehc->i.dev, "%s\n", desc); |
022bdb07 | 2448 | } else { |
a9a79dfe JP |
2449 | ata_link_err(link, "exception Emask 0x%x " |
2450 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2451 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2452 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2453 | if (desc) |
a9a79dfe | 2454 | ata_link_err(link, "%s\n", desc); |
022bdb07 TH |
2455 | } |
2456 | ||
6521148c | 2457 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2458 | if (ehc->i.serror) |
a9a79dfe | 2459 | ata_link_err(link, |
1333e194 RH |
2460 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2461 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2462 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2463 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2464 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2465 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2466 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2467 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2468 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2469 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2470 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2471 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2472 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2473 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2474 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2475 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2476 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2477 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
6521148c | 2478 | #endif |
1333e194 | 2479 | |
022bdb07 TH |
2480 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
2481 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 2482 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2483 | const u8 *cdb = qc->cdb; |
2484 | char data_buf[20] = ""; | |
2485 | char cdb_buf[70] = ""; | |
022bdb07 | 2486 | |
0260731f | 2487 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2488 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2489 | continue; |
2490 | ||
abb6a889 TH |
2491 | if (qc->dma_dir != DMA_NONE) { |
2492 | static const char *dma_str[] = { | |
2493 | [DMA_BIDIRECTIONAL] = "bidi", | |
2494 | [DMA_TO_DEVICE] = "out", | |
2495 | [DMA_FROM_DEVICE] = "in", | |
2496 | }; | |
2497 | static const char *prot_str[] = { | |
2498 | [ATA_PROT_PIO] = "pio", | |
2499 | [ATA_PROT_DMA] = "dma", | |
2500 | [ATA_PROT_NCQ] = "ncq", | |
0dc36888 TH |
2501 | [ATAPI_PROT_PIO] = "pio", |
2502 | [ATAPI_PROT_DMA] = "dma", | |
abb6a889 TH |
2503 | }; |
2504 | ||
2505 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", | |
2506 | prot_str[qc->tf.protocol], qc->nbytes, | |
2507 | dma_str[qc->dma_dir]); | |
2508 | } | |
2509 | ||
6521148c RH |
2510 | if (ata_is_atapi(qc->tf.protocol)) { |
2511 | if (qc->scsicmd) | |
2512 | scsi_print_command(qc->scsicmd); | |
2513 | else | |
2514 | snprintf(cdb_buf, sizeof(cdb_buf), | |
abb6a889 TH |
2515 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " |
2516 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", | |
2517 | cdb[0], cdb[1], cdb[2], cdb[3], | |
2518 | cdb[4], cdb[5], cdb[6], cdb[7], | |
2519 | cdb[8], cdb[9], cdb[10], cdb[11], | |
2520 | cdb[12], cdb[13], cdb[14], cdb[15]); | |
6521148c RH |
2521 | } else { |
2522 | const char *descr = ata_get_cmd_descript(cmd->command); | |
2523 | if (descr) | |
a9a79dfe JP |
2524 | ata_dev_err(qc->dev, "failed command: %s\n", |
2525 | descr); | |
6521148c | 2526 | } |
abb6a889 | 2527 | |
a9a79dfe | 2528 | ata_dev_err(qc->dev, |
8a937581 | 2529 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
abb6a889 | 2530 | "tag %d%s\n %s" |
8a937581 | 2531 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2532 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2533 | cmd->command, cmd->feature, cmd->nsect, |
2534 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2535 | cmd->hob_feature, cmd->hob_nsect, | |
2536 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2537 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2538 | res->command, res->feature, res->nsect, |
2539 | res->lbal, res->lbam, res->lbah, | |
2540 | res->hob_feature, res->hob_nsect, | |
2541 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2542 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2543 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 | 2544 | |
6521148c | 2545 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2546 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
2dcb407e | 2547 | ATA_ERR)) { |
1333e194 | 2548 | if (res->command & ATA_BUSY) |
a9a79dfe | 2549 | ata_dev_err(qc->dev, "status: { Busy }\n"); |
1333e194 | 2550 | else |
a9a79dfe | 2551 | ata_dev_err(qc->dev, "status: { %s%s%s%s}\n", |
1333e194 RH |
2552 | res->command & ATA_DRDY ? "DRDY " : "", |
2553 | res->command & ATA_DF ? "DF " : "", | |
2554 | res->command & ATA_DRQ ? "DRQ " : "", | |
2dcb407e | 2555 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2556 | } |
2557 | ||
2558 | if (cmd->command != ATA_CMD_PACKET && | |
eec7e1c1 AA |
2559 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_AMNF | |
2560 | ATA_IDNF | ATA_ABORTED))) | |
2561 | ata_dev_err(qc->dev, "error: { %s%s%s%s%s}\n", | |
1333e194 RH |
2562 | res->feature & ATA_ICRC ? "ICRC " : "", |
2563 | res->feature & ATA_UNC ? "UNC " : "", | |
eec7e1c1 | 2564 | res->feature & ATA_AMNF ? "AMNF " : "", |
1333e194 | 2565 | res->feature & ATA_IDNF ? "IDNF " : "", |
2dcb407e | 2566 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
6521148c | 2567 | #endif |
022bdb07 TH |
2568 | } |
2569 | } | |
2570 | ||
9b1e2658 TH |
2571 | /** |
2572 | * ata_eh_report - report error handling to user | |
2573 | * @ap: ATA port to report EH about | |
2574 | * | |
2575 | * Report EH to user. | |
2576 | * | |
2577 | * LOCKING: | |
2578 | * None. | |
2579 | */ | |
fb7fd614 | 2580 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2581 | { |
2582 | struct ata_link *link; | |
2583 | ||
1eca4365 | 2584 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2585 | ata_eh_link_report(link); |
2586 | } | |
2587 | ||
cc0680a5 | 2588 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2589 | unsigned int *classes, unsigned long deadline, |
2590 | bool clear_classes) | |
d87fa38e | 2591 | { |
f58229f8 | 2592 | struct ata_device *dev; |
d87fa38e | 2593 | |
b1c72916 | 2594 | if (clear_classes) |
1eca4365 | 2595 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2596 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2597 | |
f046519f | 2598 | return reset(link, classes, deadline); |
d87fa38e TH |
2599 | } |
2600 | ||
e8411fba | 2601 | static int ata_eh_followup_srst_needed(struct ata_link *link, int rc) |
664faf09 | 2602 | { |
45db2f6c | 2603 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2604 | return 0; |
5dbfc9cb TH |
2605 | if (rc == -EAGAIN) |
2606 | return 1; | |
071f44b1 | 2607 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2608 | return 1; |
664faf09 TH |
2609 | return 0; |
2610 | } | |
2611 | ||
fb7fd614 TH |
2612 | int ata_eh_reset(struct ata_link *link, int classify, |
2613 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2614 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2615 | { |
afaa5c37 | 2616 | struct ata_port *ap = link->ap; |
b1c72916 | 2617 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2618 | struct ata_eh_context *ehc = &link->eh_context; |
705d2014 | 2619 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
664faf09 | 2620 | unsigned int *classes = ehc->classes; |
416dc9ed | 2621 | unsigned int lflags = link->flags; |
1cdaf534 | 2622 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2623 | int max_tries = 0, try = 0; |
b1c72916 | 2624 | struct ata_link *failed_link; |
f58229f8 | 2625 | struct ata_device *dev; |
416dc9ed | 2626 | unsigned long deadline, now; |
022bdb07 | 2627 | ata_reset_fn_t reset; |
afaa5c37 | 2628 | unsigned long flags; |
416dc9ed | 2629 | u32 sstatus; |
b1c72916 | 2630 | int nr_unknown, rc; |
022bdb07 | 2631 | |
932648b0 TH |
2632 | /* |
2633 | * Prepare to reset | |
2634 | */ | |
d8af0eb6 TH |
2635 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2636 | max_tries++; | |
ca6d43b0 DW |
2637 | if (link->flags & ATA_LFLAG_RST_ONCE) |
2638 | max_tries = 1; | |
05944bdf TH |
2639 | if (link->flags & ATA_LFLAG_NO_HRST) |
2640 | hardreset = NULL; | |
2641 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2642 | softreset = NULL; | |
d8af0eb6 | 2643 | |
25985edc | 2644 | /* make sure each reset attempt is at least COOL_DOWN apart */ |
19b72321 TH |
2645 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
2646 | now = jiffies; | |
2647 | WARN_ON(time_after(ehc->last_reset, now)); | |
2648 | deadline = ata_deadline(ehc->last_reset, | |
2649 | ATA_EH_RESET_COOL_DOWN); | |
2650 | if (time_before(now, deadline)) | |
2651 | schedule_timeout_uninterruptible(deadline - now); | |
2652 | } | |
0a2c0f56 | 2653 | |
afaa5c37 TH |
2654 | spin_lock_irqsave(ap->lock, flags); |
2655 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2656 | spin_unlock_irqrestore(ap->lock, flags); | |
2657 | ||
cf480626 | 2658 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2659 | |
1eca4365 | 2660 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2661 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2662 | * may change configuration and be in PIO0 timing. If | |
2663 | * we do a hard reset (or are coming from power on) | |
2664 | * this is true for ATA or ATAPI. Until we've set a | |
2665 | * suitable controller mode we should not touch the | |
2666 | * bus as we may be talking too fast. | |
2667 | */ | |
2668 | dev->pio_mode = XFER_PIO_0; | |
5416912a | 2669 | dev->dma_mode = 0xff; |
cdeab114 TH |
2670 | |
2671 | /* If the controller has a pio mode setup function | |
2672 | * then use it to set the chipset to rights. Don't | |
2673 | * touch the DMA setup as that will be dealt with when | |
2674 | * configuring devices. | |
2675 | */ | |
2676 | if (ap->ops->set_piomode) | |
2677 | ap->ops->set_piomode(ap, dev); | |
2678 | } | |
2679 | ||
cf480626 | 2680 | /* prefer hardreset */ |
932648b0 | 2681 | reset = NULL; |
cf480626 TH |
2682 | ehc->i.action &= ~ATA_EH_RESET; |
2683 | if (hardreset) { | |
2684 | reset = hardreset; | |
a674050e | 2685 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2686 | } else if (softreset) { |
cf480626 | 2687 | reset = softreset; |
a674050e | 2688 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2689 | } |
f5914a46 TH |
2690 | |
2691 | if (prereset) { | |
b1c72916 TH |
2692 | unsigned long deadline = ata_deadline(jiffies, |
2693 | ATA_EH_PRERESET_TIMEOUT); | |
2694 | ||
2695 | if (slave) { | |
2696 | sehc->i.action &= ~ATA_EH_RESET; | |
2697 | sehc->i.action |= ehc->i.action; | |
2698 | } | |
2699 | ||
2700 | rc = prereset(link, deadline); | |
2701 | ||
2702 | /* If present, do prereset on slave link too. Reset | |
2703 | * is skipped iff both master and slave links report | |
2704 | * -ENOENT or clear ATA_EH_RESET. | |
2705 | */ | |
2706 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2707 | int tmp; | |
2708 | ||
2709 | tmp = prereset(slave, deadline); | |
2710 | if (tmp != -ENOENT) | |
2711 | rc = tmp; | |
2712 | ||
2713 | ehc->i.action |= sehc->i.action; | |
2714 | } | |
2715 | ||
f5914a46 | 2716 | if (rc) { |
c961922b | 2717 | if (rc == -ENOENT) { |
a9a79dfe | 2718 | ata_link_dbg(link, "port disabled--ignoring\n"); |
cf480626 | 2719 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2720 | |
1eca4365 | 2721 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2722 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2723 | |
2724 | rc = 0; | |
c961922b | 2725 | } else |
a9a79dfe JP |
2726 | ata_link_err(link, |
2727 | "prereset failed (errno=%d)\n", | |
2728 | rc); | |
fccb6ea5 | 2729 | goto out; |
f5914a46 | 2730 | } |
f5914a46 | 2731 | |
932648b0 | 2732 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2733 | * bang classes, thaw and return. |
932648b0 TH |
2734 | */ |
2735 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2736 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2737 | classes[dev->devno] = ATA_DEV_NONE; |
d6515e6f TH |
2738 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
2739 | ata_is_host_link(link)) | |
2740 | ata_eh_thaw_port(ap); | |
932648b0 TH |
2741 | rc = 0; |
2742 | goto out; | |
2743 | } | |
f5914a46 TH |
2744 | } |
2745 | ||
022bdb07 | 2746 | retry: |
932648b0 TH |
2747 | /* |
2748 | * Perform reset | |
2749 | */ | |
dc98c32c TH |
2750 | if (ata_is_host_link(link)) |
2751 | ata_eh_freeze_port(ap); | |
2752 | ||
341c2c95 | 2753 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2754 | |
932648b0 TH |
2755 | if (reset) { |
2756 | if (verbose) | |
a9a79dfe JP |
2757 | ata_link_info(link, "%s resetting link\n", |
2758 | reset == softreset ? "soft" : "hard"); | |
932648b0 TH |
2759 | |
2760 | /* mark that this EH session started with reset */ | |
19b72321 | 2761 | ehc->last_reset = jiffies; |
932648b0 TH |
2762 | if (reset == hardreset) |
2763 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2764 | else | |
2765 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2766 | |
b1c72916 TH |
2767 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2768 | if (rc && rc != -EAGAIN) { | |
2769 | failed_link = link; | |
5dbfc9cb | 2770 | goto fail; |
b1c72916 TH |
2771 | } |
2772 | ||
2773 | /* hardreset slave link if existent */ | |
2774 | if (slave && reset == hardreset) { | |
2775 | int tmp; | |
2776 | ||
2777 | if (verbose) | |
a9a79dfe | 2778 | ata_link_info(slave, "hard resetting link\n"); |
b1c72916 TH |
2779 | |
2780 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2781 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2782 | false); | |
2783 | switch (tmp) { | |
2784 | case -EAGAIN: | |
2785 | rc = -EAGAIN; | |
2786 | case 0: | |
2787 | break; | |
2788 | default: | |
2789 | failed_link = slave; | |
2790 | rc = tmp; | |
2791 | goto fail; | |
2792 | } | |
2793 | } | |
022bdb07 | 2794 | |
b1c72916 | 2795 | /* perform follow-up SRST if necessary */ |
932648b0 | 2796 | if (reset == hardreset && |
e8411fba | 2797 | ata_eh_followup_srst_needed(link, rc)) { |
932648b0 | 2798 | reset = softreset; |
022bdb07 | 2799 | |
932648b0 | 2800 | if (!reset) { |
a9a79dfe JP |
2801 | ata_link_err(link, |
2802 | "follow-up softreset required but no softreset available\n"); | |
b1c72916 | 2803 | failed_link = link; |
932648b0 TH |
2804 | rc = -EINVAL; |
2805 | goto fail; | |
2806 | } | |
664faf09 | 2807 | |
932648b0 | 2808 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2809 | rc = ata_do_reset(link, reset, classes, deadline, true); |
fe2c4d01 TH |
2810 | if (rc) { |
2811 | failed_link = link; | |
2812 | goto fail; | |
2813 | } | |
664faf09 | 2814 | } |
932648b0 TH |
2815 | } else { |
2816 | if (verbose) | |
a9a79dfe JP |
2817 | ata_link_info(link, |
2818 | "no reset method available, skipping reset\n"); | |
932648b0 TH |
2819 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) |
2820 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2821 | } |
2822 | ||
932648b0 TH |
2823 | /* |
2824 | * Post-reset processing | |
2825 | */ | |
1eca4365 | 2826 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2827 | /* After the reset, the device state is PIO 0 and the |
2828 | * controller state is undefined. Reset also wakes up | |
2829 | * drives from sleeping mode. | |
2830 | */ | |
2831 | dev->pio_mode = XFER_PIO_0; | |
2832 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2833 | |
3b761d3d TH |
2834 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
2835 | continue; | |
2836 | ||
2837 | /* apply class override */ | |
2838 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2839 | classes[dev->devno] = ATA_DEV_ATA; | |
2840 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2841 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
022bdb07 TH |
2842 | } |
2843 | ||
416dc9ed TH |
2844 | /* record current link speed */ |
2845 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2846 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2847 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2848 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2849 | |
dc98c32c TH |
2850 | /* thaw the port */ |
2851 | if (ata_is_host_link(link)) | |
2852 | ata_eh_thaw_port(ap); | |
2853 | ||
f046519f TH |
2854 | /* postreset() should clear hardware SError. Although SError |
2855 | * is cleared during link resume, clearing SError here is | |
2856 | * necessary as some PHYs raise hotplug events after SRST. | |
2857 | * This introduces race condition where hotplug occurs between | |
2858 | * reset and here. This race is mediated by cross checking | |
2859 | * link onlineness and classification result later. | |
2860 | */ | |
b1c72916 | 2861 | if (postreset) { |
416dc9ed | 2862 | postreset(link, classes); |
b1c72916 TH |
2863 | if (slave) |
2864 | postreset(slave, classes); | |
2865 | } | |
20952b69 | 2866 | |
1e641060 | 2867 | /* |
8c56cacc TH |
2868 | * Some controllers can't be frozen very well and may set spurious |
2869 | * error conditions during reset. Clear accumulated error | |
2870 | * information and re-thaw the port if frozen. As reset is the | |
2871 | * final recovery action and we cross check link onlineness against | |
2872 | * device classification later, no hotplug event is lost by this. | |
1e641060 | 2873 | */ |
f046519f | 2874 | spin_lock_irqsave(link->ap->lock, flags); |
1e641060 | 2875 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
b1c72916 | 2876 | if (slave) |
1e641060 TH |
2877 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
2878 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
f046519f TH |
2879 | spin_unlock_irqrestore(link->ap->lock, flags); |
2880 | ||
8c56cacc TH |
2881 | if (ap->pflags & ATA_PFLAG_FROZEN) |
2882 | ata_eh_thaw_port(ap); | |
2883 | ||
3b761d3d TH |
2884 | /* |
2885 | * Make sure onlineness and classification result correspond. | |
f046519f TH |
2886 | * Hotplug could have happened during reset and some |
2887 | * controllers fail to wait while a drive is spinning up after | |
2888 | * being hotplugged causing misdetection. By cross checking | |
3b761d3d TH |
2889 | * link on/offlineness and classification result, those |
2890 | * conditions can be reliably detected and retried. | |
f046519f | 2891 | */ |
b1c72916 | 2892 | nr_unknown = 0; |
1eca4365 | 2893 | ata_for_each_dev(dev, link, ALL) { |
3b761d3d TH |
2894 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
2895 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe | 2896 | ata_dev_dbg(dev, "link online but device misclassified\n"); |
3b761d3d | 2897 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2898 | nr_unknown++; |
3b761d3d TH |
2899 | } |
2900 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { | |
2901 | if (ata_class_enabled(classes[dev->devno])) | |
a9a79dfe JP |
2902 | ata_dev_dbg(dev, |
2903 | "link offline, clearing class %d to NONE\n", | |
2904 | classes[dev->devno]); | |
3b761d3d TH |
2905 | classes[dev->devno] = ATA_DEV_NONE; |
2906 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe JP |
2907 | ata_dev_dbg(dev, |
2908 | "link status unknown, clearing UNKNOWN to NONE\n"); | |
3b761d3d | 2909 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 2910 | } |
f046519f TH |
2911 | } |
2912 | ||
b1c72916 | 2913 | if (classify && nr_unknown) { |
f046519f | 2914 | if (try < max_tries) { |
a9a79dfe JP |
2915 | ata_link_warn(link, |
2916 | "link online but %d devices misclassified, retrying\n", | |
2917 | nr_unknown); | |
b1c72916 | 2918 | failed_link = link; |
f046519f TH |
2919 | rc = -EAGAIN; |
2920 | goto fail; | |
2921 | } | |
a9a79dfe JP |
2922 | ata_link_warn(link, |
2923 | "link online but %d devices misclassified, " | |
2924 | "device detection might fail\n", nr_unknown); | |
f046519f TH |
2925 | } |
2926 | ||
416dc9ed | 2927 | /* reset successful, schedule revalidation */ |
cf480626 | 2928 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2929 | if (slave) |
2930 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
6b7ae954 | 2931 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2932 | ehc->i.action |= ATA_EH_REVALIDATE; |
6b7ae954 | 2933 | link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */ |
ae791c05 | 2934 | |
416dc9ed | 2935 | rc = 0; |
fccb6ea5 TH |
2936 | out: |
2937 | /* clear hotplug flag */ | |
2938 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2939 | if (slave) |
2940 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2941 | |
2942 | spin_lock_irqsave(ap->lock, flags); | |
2943 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2944 | spin_unlock_irqrestore(ap->lock, flags); | |
2945 | ||
022bdb07 | 2946 | return rc; |
416dc9ed TH |
2947 | |
2948 | fail: | |
5958e302 TH |
2949 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2950 | if (!ata_is_host_link(link) && | |
2951 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2952 | rc = -ERESTART; | |
2953 | ||
7a46c078 | 2954 | if (try >= max_tries) { |
8ea7645c TH |
2955 | /* |
2956 | * Thaw host port even if reset failed, so that the port | |
2957 | * can be retried on the next phy event. This risks | |
2958 | * repeated EH runs but seems to be a better tradeoff than | |
2959 | * shutting down a port after a botched hotplug attempt. | |
2960 | */ | |
2961 | if (ata_is_host_link(link)) | |
2962 | ata_eh_thaw_port(ap); | |
416dc9ed | 2963 | goto out; |
8ea7645c | 2964 | } |
416dc9ed TH |
2965 | |
2966 | now = jiffies; | |
2967 | if (time_before(now, deadline)) { | |
2968 | unsigned long delta = deadline - now; | |
2969 | ||
a9a79dfe | 2970 | ata_link_warn(failed_link, |
0a2c0f56 TH |
2971 | "reset failed (errno=%d), retrying in %u secs\n", |
2972 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed | 2973 | |
c0c362b6 | 2974 | ata_eh_release(ap); |
416dc9ed TH |
2975 | while (delta) |
2976 | delta = schedule_timeout_uninterruptible(delta); | |
c0c362b6 | 2977 | ata_eh_acquire(ap); |
416dc9ed TH |
2978 | } |
2979 | ||
7a46c078 GG |
2980 | /* |
2981 | * While disks spinup behind PMP, some controllers fail sending SRST. | |
2982 | * They need to be reset - as well as the PMP - before retrying. | |
2983 | */ | |
2984 | if (rc == -ERESTART) { | |
2985 | if (ata_is_host_link(link)) | |
2986 | ata_eh_thaw_port(ap); | |
2987 | goto out; | |
2988 | } | |
2989 | ||
b1c72916 | 2990 | if (try == max_tries - 1) { |
a07d499b | 2991 | sata_down_spd_limit(link, 0); |
b1c72916 | 2992 | if (slave) |
a07d499b | 2993 | sata_down_spd_limit(slave, 0); |
b1c72916 | 2994 | } else if (rc == -EPIPE) |
a07d499b | 2995 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 2996 | |
416dc9ed TH |
2997 | if (hardreset) |
2998 | reset = hardreset; | |
2999 | goto retry; | |
022bdb07 TH |
3000 | } |
3001 | ||
45fabbb7 EO |
3002 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
3003 | { | |
3004 | struct ata_link *link; | |
3005 | struct ata_device *dev; | |
3006 | unsigned long flags; | |
3007 | ||
3008 | /* | |
3009 | * This function can be thought of as an extended version of | |
3010 | * ata_eh_about_to_do() specially crafted to accommodate the | |
3011 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
3012 | * does not leave the do {} while () loop in ata_eh_recover as | |
3013 | * long as the timeout for a park request to *one* device on | |
3014 | * the port has not expired, and since we still want to pick | |
3015 | * up park requests to other devices on the same port or | |
3016 | * timeout updates for the same device, we have to pull | |
3017 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
3018 | * ourselves at the beginning of each pass over the loop. | |
3019 | * | |
3020 | * Additionally, all write accesses to &ap->park_req_pending | |
16735d02 | 3021 | * through reinit_completion() (see below) or complete_all() |
45fabbb7 EO |
3022 | * (see ata_scsi_park_store()) are protected by the host lock. |
3023 | * As a result we have that park_req_pending.done is zero on | |
3024 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
3025 | * *all* devices on port ap have been pulled into the | |
3026 | * respective eh_context structs. If, and only if, | |
3027 | * park_req_pending.done is non-zero by the time we reach | |
3028 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
3029 | * has been scheduled for at least one of the devices on port | |
3030 | * ap and we have to cycle over the do {} while () loop in | |
3031 | * ata_eh_recover() again. | |
3032 | */ | |
3033 | ||
3034 | spin_lock_irqsave(ap->lock, flags); | |
16735d02 | 3035 | reinit_completion(&ap->park_req_pending); |
1eca4365 TH |
3036 | ata_for_each_link(link, ap, EDGE) { |
3037 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3038 | struct ata_eh_info *ehi = &link->eh_info; |
3039 | ||
3040 | link->eh_context.i.dev_action[dev->devno] |= | |
3041 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
3042 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
3043 | } | |
3044 | } | |
3045 | spin_unlock_irqrestore(ap->lock, flags); | |
3046 | } | |
3047 | ||
3048 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
3049 | { | |
3050 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
3051 | struct ata_taskfile tf; | |
3052 | unsigned int err_mask; | |
3053 | ||
3054 | ata_tf_init(dev, &tf); | |
3055 | if (park) { | |
3056 | ehc->unloaded_mask |= 1 << dev->devno; | |
3057 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
3058 | tf.feature = 0x44; | |
3059 | tf.lbal = 0x4c; | |
3060 | tf.lbam = 0x4e; | |
3061 | tf.lbah = 0x55; | |
3062 | } else { | |
3063 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
3064 | tf.command = ATA_CMD_CHK_POWER; | |
3065 | } | |
3066 | ||
3067 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
3068 | tf.protocol |= ATA_PROT_NODATA; | |
3069 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
3070 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
a9a79dfe | 3071 | ata_dev_err(dev, "head unload failed!\n"); |
45fabbb7 EO |
3072 | ehc->unloaded_mask &= ~(1 << dev->devno); |
3073 | } | |
3074 | } | |
3075 | ||
0260731f | 3076 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 3077 | struct ata_device **r_failed_dev) |
022bdb07 | 3078 | { |
0260731f TH |
3079 | struct ata_port *ap = link->ap; |
3080 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 3081 | struct ata_device *dev; |
8c3c52a8 | 3082 | unsigned int new_mask = 0; |
084fe639 | 3083 | unsigned long flags; |
f58229f8 | 3084 | int rc = 0; |
022bdb07 TH |
3085 | |
3086 | DPRINTK("ENTER\n"); | |
3087 | ||
8c3c52a8 TH |
3088 | /* For PATA drive side cable detection to work, IDENTIFY must |
3089 | * be done backwards such that PDIAG- is released by the slave | |
3090 | * device before the master device is identified. | |
3091 | */ | |
1eca4365 | 3092 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
3093 | unsigned int action = ata_eh_dev_action(dev); |
3094 | unsigned int readid_flags = 0; | |
022bdb07 | 3095 | |
bff04647 TH |
3096 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
3097 | readid_flags |= ATA_READID_POSTRESET; | |
3098 | ||
9666f400 | 3099 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
3100 | WARN_ON(dev->class == ATA_DEV_PMP); |
3101 | ||
b1c72916 | 3102 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 3103 | rc = -EIO; |
8c3c52a8 | 3104 | goto err; |
022bdb07 TH |
3105 | } |
3106 | ||
0260731f | 3107 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
3108 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
3109 | readid_flags); | |
022bdb07 | 3110 | if (rc) |
8c3c52a8 | 3111 | goto err; |
022bdb07 | 3112 | |
0260731f | 3113 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 3114 | |
baa1e78a TH |
3115 | /* Configuration may have changed, reconfigure |
3116 | * transfer mode. | |
3117 | */ | |
3118 | ehc->i.flags |= ATA_EHI_SETMODE; | |
3119 | ||
3057ac3c | 3120 | /* schedule the scsi_rescan_device() here */ |
ad72cf98 | 3121 | schedule_work(&(ap->scsi_rescan_task)); |
084fe639 TH |
3122 | } else if (dev->class == ATA_DEV_UNKNOWN && |
3123 | ehc->tries[dev->devno] && | |
3124 | ata_class_enabled(ehc->classes[dev->devno])) { | |
842faa6c TH |
3125 | /* Temporarily set dev->class, it will be |
3126 | * permanently set once all configurations are | |
3127 | * complete. This is necessary because new | |
3128 | * device configuration is done in two | |
3129 | * separate loops. | |
3130 | */ | |
084fe639 TH |
3131 | dev->class = ehc->classes[dev->devno]; |
3132 | ||
633273a3 TH |
3133 | if (dev->class == ATA_DEV_PMP) |
3134 | rc = sata_pmp_attach(dev); | |
3135 | else | |
3136 | rc = ata_dev_read_id(dev, &dev->class, | |
3137 | readid_flags, dev->id); | |
842faa6c TH |
3138 | |
3139 | /* read_id might have changed class, store and reset */ | |
3140 | ehc->classes[dev->devno] = dev->class; | |
3141 | dev->class = ATA_DEV_UNKNOWN; | |
3142 | ||
8c3c52a8 TH |
3143 | switch (rc) { |
3144 | case 0: | |
99cf610a TH |
3145 | /* clear error info accumulated during probe */ |
3146 | ata_ering_clear(&dev->ering); | |
f58229f8 | 3147 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
3148 | break; |
3149 | case -ENOENT: | |
55a8e2c8 TH |
3150 | /* IDENTIFY was issued to non-existent |
3151 | * device. No need to reset. Just | |
842faa6c | 3152 | * thaw and ignore the device. |
55a8e2c8 TH |
3153 | */ |
3154 | ata_eh_thaw_port(ap); | |
084fe639 | 3155 | break; |
8c3c52a8 | 3156 | default: |
8c3c52a8 | 3157 | goto err; |
084fe639 | 3158 | } |
8c3c52a8 TH |
3159 | } |
3160 | } | |
084fe639 | 3161 | |
c1c4e8d5 | 3162 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
3163 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
3164 | if (ap->ops->cable_detect) | |
3165 | ap->cbl = ap->ops->cable_detect(ap); | |
3166 | ata_force_cbl(ap); | |
3167 | } | |
c1c4e8d5 | 3168 | |
8c3c52a8 TH |
3169 | /* Configure new devices forward such that user doesn't see |
3170 | * device detection messages backwards. | |
3171 | */ | |
1eca4365 | 3172 | ata_for_each_dev(dev, link, ALL) { |
4f7c2874 | 3173 | if (!(new_mask & (1 << dev->devno))) |
8c3c52a8 TH |
3174 | continue; |
3175 | ||
842faa6c TH |
3176 | dev->class = ehc->classes[dev->devno]; |
3177 | ||
4f7c2874 TH |
3178 | if (dev->class == ATA_DEV_PMP) |
3179 | continue; | |
3180 | ||
8c3c52a8 TH |
3181 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
3182 | rc = ata_dev_configure(dev); | |
3183 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
842faa6c TH |
3184 | if (rc) { |
3185 | dev->class = ATA_DEV_UNKNOWN; | |
8c3c52a8 | 3186 | goto err; |
842faa6c | 3187 | } |
8c3c52a8 TH |
3188 | |
3189 | spin_lock_irqsave(ap->lock, flags); | |
3190 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
3191 | spin_unlock_irqrestore(ap->lock, flags); | |
3192 | ||
3193 | /* new device discovered, configure xfermode */ | |
3194 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
3195 | } |
3196 | ||
8c3c52a8 | 3197 | return 0; |
022bdb07 | 3198 | |
8c3c52a8 TH |
3199 | err: |
3200 | *r_failed_dev = dev; | |
3201 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
3202 | return rc; |
3203 | } | |
3204 | ||
6f1d1e3a TH |
3205 | /** |
3206 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
3207 | * @link: link on which timings will be programmed | |
98a1708d | 3208 | * @r_failed_dev: out parameter for failed device |
6f1d1e3a TH |
3209 | * |
3210 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3211 | * ata_set_mode() fails, pointer to the failing device is | |
3212 | * returned in @r_failed_dev. | |
3213 | * | |
3214 | * LOCKING: | |
3215 | * PCI/etc. bus probe sem. | |
3216 | * | |
3217 | * RETURNS: | |
3218 | * 0 on success, negative errno otherwise | |
3219 | */ | |
3220 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
3221 | { | |
3222 | struct ata_port *ap = link->ap; | |
00115e0f TH |
3223 | struct ata_device *dev; |
3224 | int rc; | |
6f1d1e3a | 3225 | |
76326ac1 | 3226 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 3227 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
3228 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
3229 | struct ata_ering_entry *ent; | |
3230 | ||
3231 | ent = ata_ering_top(&dev->ering); | |
3232 | if (ent) | |
3233 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
3234 | } | |
3235 | } | |
3236 | ||
6f1d1e3a TH |
3237 | /* has private set_mode? */ |
3238 | if (ap->ops->set_mode) | |
00115e0f TH |
3239 | rc = ap->ops->set_mode(link, r_failed_dev); |
3240 | else | |
3241 | rc = ata_do_set_mode(link, r_failed_dev); | |
3242 | ||
3243 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 3244 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
3245 | struct ata_eh_context *ehc = &link->eh_context; |
3246 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
3247 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
3248 | ||
3249 | if (dev->xfer_mode != saved_xfer_mode || | |
3250 | ata_ncq_enabled(dev) != saved_ncq) | |
3251 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
3252 | } | |
3253 | ||
3254 | return rc; | |
6f1d1e3a TH |
3255 | } |
3256 | ||
11fc33da TH |
3257 | /** |
3258 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
3259 | * @dev: ATAPI device to clear UA for | |
3260 | * | |
3261 | * Resets and other operations can make an ATAPI device raise | |
3262 | * UNIT ATTENTION which causes the next operation to fail. This | |
3263 | * function clears UA. | |
3264 | * | |
3265 | * LOCKING: | |
3266 | * EH context (may sleep). | |
3267 | * | |
3268 | * RETURNS: | |
3269 | * 0 on success, -errno on failure. | |
3270 | */ | |
3271 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
3272 | { | |
3273 | int i; | |
3274 | ||
3275 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 3276 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
3277 | u8 sense_key = 0; |
3278 | unsigned int err_mask; | |
3279 | ||
3280 | err_mask = atapi_eh_tur(dev, &sense_key); | |
3281 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3282 | ata_dev_warn(dev, |
3283 | "TEST_UNIT_READY failed (err_mask=0x%x)\n", | |
3284 | err_mask); | |
11fc33da TH |
3285 | return -EIO; |
3286 | } | |
3287 | ||
3288 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
3289 | return 0; | |
3290 | ||
3291 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
3292 | if (err_mask) { | |
a9a79dfe | 3293 | ata_dev_warn(dev, "failed to clear " |
11fc33da TH |
3294 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); |
3295 | return -EIO; | |
3296 | } | |
3297 | } | |
3298 | ||
a9a79dfe JP |
3299 | ata_dev_warn(dev, "UNIT ATTENTION persists after %d tries\n", |
3300 | ATA_EH_UA_TRIES); | |
11fc33da TH |
3301 | |
3302 | return 0; | |
3303 | } | |
3304 | ||
6013efd8 TH |
3305 | /** |
3306 | * ata_eh_maybe_retry_flush - Retry FLUSH if necessary | |
3307 | * @dev: ATA device which may need FLUSH retry | |
3308 | * | |
3309 | * If @dev failed FLUSH, it needs to be reported upper layer | |
3310 | * immediately as it means that @dev failed to remap and already | |
3311 | * lost at least a sector and further FLUSH retrials won't make | |
3312 | * any difference to the lost sector. However, if FLUSH failed | |
3313 | * for other reasons, for example transmission error, FLUSH needs | |
3314 | * to be retried. | |
3315 | * | |
3316 | * This function determines whether FLUSH failure retry is | |
3317 | * necessary and performs it if so. | |
3318 | * | |
3319 | * RETURNS: | |
3320 | * 0 if EH can continue, -errno if EH needs to be repeated. | |
3321 | */ | |
3322 | static int ata_eh_maybe_retry_flush(struct ata_device *dev) | |
3323 | { | |
3324 | struct ata_link *link = dev->link; | |
3325 | struct ata_port *ap = link->ap; | |
3326 | struct ata_queued_cmd *qc; | |
3327 | struct ata_taskfile tf; | |
3328 | unsigned int err_mask; | |
3329 | int rc = 0; | |
3330 | ||
3331 | /* did flush fail for this device? */ | |
3332 | if (!ata_tag_valid(link->active_tag)) | |
3333 | return 0; | |
3334 | ||
3335 | qc = __ata_qc_from_tag(ap, link->active_tag); | |
3336 | if (qc->dev != dev || (qc->tf.command != ATA_CMD_FLUSH_EXT && | |
3337 | qc->tf.command != ATA_CMD_FLUSH)) | |
3338 | return 0; | |
3339 | ||
3340 | /* if the device failed it, it should be reported to upper layers */ | |
3341 | if (qc->err_mask & AC_ERR_DEV) | |
3342 | return 0; | |
3343 | ||
3344 | /* flush failed for some other reason, give it another shot */ | |
3345 | ata_tf_init(dev, &tf); | |
3346 | ||
3347 | tf.command = qc->tf.command; | |
3348 | tf.flags |= ATA_TFLAG_DEVICE; | |
3349 | tf.protocol = ATA_PROT_NODATA; | |
3350 | ||
a9a79dfe | 3351 | ata_dev_warn(dev, "retrying FLUSH 0x%x Emask 0x%x\n", |
6013efd8 TH |
3352 | tf.command, qc->err_mask); |
3353 | ||
3354 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
3355 | if (!err_mask) { | |
3356 | /* | |
3357 | * FLUSH is complete but there's no way to | |
3358 | * successfully complete a failed command from EH. | |
3359 | * Making sure retry is allowed at least once and | |
3360 | * retrying it should do the trick - whatever was in | |
3361 | * the cache is already on the platter and this won't | |
3362 | * cause infinite loop. | |
3363 | */ | |
3364 | qc->scsicmd->allowed = max(qc->scsicmd->allowed, 1); | |
3365 | } else { | |
a9a79dfe | 3366 | ata_dev_warn(dev, "FLUSH failed Emask 0x%x\n", |
6013efd8 TH |
3367 | err_mask); |
3368 | rc = -EIO; | |
3369 | ||
3370 | /* if device failed it, report it to upper layers */ | |
3371 | if (err_mask & AC_ERR_DEV) { | |
3372 | qc->err_mask |= AC_ERR_DEV; | |
3373 | qc->result_tf = tf; | |
3374 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
3375 | rc = 0; | |
3376 | } | |
3377 | } | |
3378 | return rc; | |
3379 | } | |
3380 | ||
6b7ae954 TH |
3381 | /** |
3382 | * ata_eh_set_lpm - configure SATA interface power management | |
3383 | * @link: link to configure power management | |
3384 | * @policy: the link power management policy | |
3385 | * @r_failed_dev: out parameter for failed device | |
3386 | * | |
3387 | * Enable SATA Interface power management. This will enable | |
3388 | * Device Interface Power Management (DIPM) for min_power | |
3389 | * policy, and then call driver specific callbacks for | |
3390 | * enabling Host Initiated Power management. | |
3391 | * | |
3392 | * LOCKING: | |
3393 | * EH context. | |
3394 | * | |
3395 | * RETURNS: | |
3396 | * 0 on success, -errno on failure. | |
3397 | */ | |
3398 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
3399 | struct ata_device **r_failed_dev) | |
3400 | { | |
6c8ea89c | 3401 | struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL; |
6b7ae954 TH |
3402 | struct ata_eh_context *ehc = &link->eh_context; |
3403 | struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; | |
e5005b15 | 3404 | enum ata_lpm_policy old_policy = link->lpm_policy; |
5f6f12cc | 3405 | bool no_dipm = link->ap->flags & ATA_FLAG_NO_DIPM; |
6b7ae954 TH |
3406 | unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; |
3407 | unsigned int err_mask; | |
3408 | int rc; | |
3409 | ||
3410 | /* if the link or host doesn't do LPM, noop */ | |
3411 | if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) | |
3412 | return 0; | |
3413 | ||
3414 | /* | |
3415 | * DIPM is enabled only for MIN_POWER as some devices | |
3416 | * misbehave when the host NACKs transition to SLUMBER. Order | |
3417 | * device and link configurations such that the host always | |
3418 | * allows DIPM requests. | |
3419 | */ | |
3420 | ata_for_each_dev(dev, link, ENABLED) { | |
3421 | bool hipm = ata_id_has_hipm(dev->id); | |
ae01b249 | 3422 | bool dipm = ata_id_has_dipm(dev->id) && !no_dipm; |
6b7ae954 TH |
3423 | |
3424 | /* find the first enabled and LPM enabled devices */ | |
3425 | if (!link_dev) | |
3426 | link_dev = dev; | |
3427 | ||
3428 | if (!lpm_dev && (hipm || dipm)) | |
3429 | lpm_dev = dev; | |
3430 | ||
3431 | hints &= ~ATA_LPM_EMPTY; | |
3432 | if (!hipm) | |
3433 | hints &= ~ATA_LPM_HIPM; | |
3434 | ||
3435 | /* disable DIPM before changing link config */ | |
3436 | if (policy != ATA_LPM_MIN_POWER && dipm) { | |
3437 | err_mask = ata_dev_set_feature(dev, | |
3438 | SETFEATURES_SATA_DISABLE, SATA_DIPM); | |
3439 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3440 | ata_dev_warn(dev, |
3441 | "failed to disable DIPM, Emask 0x%x\n", | |
3442 | err_mask); | |
6b7ae954 TH |
3443 | rc = -EIO; |
3444 | goto fail; | |
3445 | } | |
3446 | } | |
3447 | } | |
3448 | ||
6c8ea89c TH |
3449 | if (ap) { |
3450 | rc = ap->ops->set_lpm(link, policy, hints); | |
3451 | if (!rc && ap->slave_link) | |
3452 | rc = ap->ops->set_lpm(ap->slave_link, policy, hints); | |
3453 | } else | |
3454 | rc = sata_pmp_set_lpm(link, policy, hints); | |
6b7ae954 TH |
3455 | |
3456 | /* | |
3457 | * Attribute link config failure to the first (LPM) enabled | |
3458 | * device on the link. | |
3459 | */ | |
3460 | if (rc) { | |
3461 | if (rc == -EOPNOTSUPP) { | |
3462 | link->flags |= ATA_LFLAG_NO_LPM; | |
3463 | return 0; | |
3464 | } | |
3465 | dev = lpm_dev ? lpm_dev : link_dev; | |
3466 | goto fail; | |
3467 | } | |
3468 | ||
e5005b15 TH |
3469 | /* |
3470 | * Low level driver acked the transition. Issue DIPM command | |
3471 | * with the new policy set. | |
3472 | */ | |
3473 | link->lpm_policy = policy; | |
3474 | if (ap && ap->slave_link) | |
3475 | ap->slave_link->lpm_policy = policy; | |
3476 | ||
6b7ae954 TH |
3477 | /* host config updated, enable DIPM if transitioning to MIN_POWER */ |
3478 | ata_for_each_dev(dev, link, ENABLED) { | |
ae01b249 TH |
3479 | if (policy == ATA_LPM_MIN_POWER && !no_dipm && |
3480 | ata_id_has_dipm(dev->id)) { | |
6b7ae954 TH |
3481 | err_mask = ata_dev_set_feature(dev, |
3482 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
3483 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe | 3484 | ata_dev_warn(dev, |
6b7ae954 TH |
3485 | "failed to enable DIPM, Emask 0x%x\n", |
3486 | err_mask); | |
3487 | rc = -EIO; | |
3488 | goto fail; | |
3489 | } | |
3490 | } | |
3491 | } | |
3492 | ||
6b7ae954 TH |
3493 | return 0; |
3494 | ||
3495 | fail: | |
e5005b15 TH |
3496 | /* restore the old policy */ |
3497 | link->lpm_policy = old_policy; | |
3498 | if (ap && ap->slave_link) | |
3499 | ap->slave_link->lpm_policy = old_policy; | |
3500 | ||
6b7ae954 TH |
3501 | /* if no device or only one more chance is left, disable LPM */ |
3502 | if (!dev || ehc->tries[dev->devno] <= 2) { | |
a9a79dfe | 3503 | ata_link_warn(link, "disabling LPM on the link\n"); |
6b7ae954 TH |
3504 | link->flags |= ATA_LFLAG_NO_LPM; |
3505 | } | |
3506 | if (r_failed_dev) | |
3507 | *r_failed_dev = dev; | |
3508 | return rc; | |
3509 | } | |
3510 | ||
8a745f1f | 3511 | int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 3512 | { |
f58229f8 TH |
3513 | struct ata_device *dev; |
3514 | int cnt = 0; | |
022bdb07 | 3515 | |
1eca4365 TH |
3516 | ata_for_each_dev(dev, link, ENABLED) |
3517 | cnt++; | |
022bdb07 TH |
3518 | return cnt; |
3519 | } | |
3520 | ||
0260731f | 3521 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 3522 | { |
f58229f8 TH |
3523 | struct ata_device *dev; |
3524 | int cnt = 0; | |
084fe639 | 3525 | |
1eca4365 | 3526 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 3527 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
3528 | cnt++; |
3529 | return cnt; | |
3530 | } | |
3531 | ||
0260731f | 3532 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 3533 | { |
672b2d65 | 3534 | struct ata_port *ap = link->ap; |
0260731f | 3535 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 3536 | struct ata_device *dev; |
084fe639 | 3537 | |
f9df58cb TH |
3538 | /* skip disabled links */ |
3539 | if (link->flags & ATA_LFLAG_DISABLED) | |
3540 | return 1; | |
3541 | ||
e2f3d75f TH |
3542 | /* skip if explicitly requested */ |
3543 | if (ehc->i.flags & ATA_EHI_NO_RECOVERY) | |
3544 | return 1; | |
3545 | ||
672b2d65 TH |
3546 | /* thaw frozen port and recover failed devices */ |
3547 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
3548 | return 0; | |
3549 | ||
3550 | /* reset at least once if reset is requested */ | |
3551 | if ((ehc->i.action & ATA_EH_RESET) && | |
3552 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
3553 | return 0; |
3554 | ||
3555 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 3556 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
3557 | if (dev->class == ATA_DEV_UNKNOWN && |
3558 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
3559 | return 0; | |
3560 | } | |
3561 | ||
3562 | return 1; | |
3563 | } | |
3564 | ||
c2c7a89c TH |
3565 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
3566 | { | |
3567 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
3568 | u64 now = get_jiffies_64(); | |
3569 | int *trials = void_arg; | |
3570 | ||
6868225e LM |
3571 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || |
3572 | (ent->timestamp < now - min(now, interval))) | |
c2c7a89c TH |
3573 | return -1; |
3574 | ||
3575 | (*trials)++; | |
3576 | return 0; | |
3577 | } | |
3578 | ||
02c05a27 TH |
3579 | static int ata_eh_schedule_probe(struct ata_device *dev) |
3580 | { | |
3581 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3582 | struct ata_link *link = ata_dev_phys_link(dev); |
3583 | int trials = 0; | |
02c05a27 TH |
3584 | |
3585 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3586 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3587 | return 0; | |
3588 | ||
3589 | ata_eh_detach_dev(dev); | |
3590 | ata_dev_init(dev); | |
3591 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3592 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3593 | ehc->saved_xfer_mode[dev->devno] = 0; |
3594 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3595 | |
6b7ae954 | 3596 | /* the link maybe in a deep sleep, wake it up */ |
6c8ea89c TH |
3597 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { |
3598 | if (ata_is_host_link(link)) | |
3599 | link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER, | |
3600 | ATA_LPM_EMPTY); | |
3601 | else | |
3602 | sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER, | |
3603 | ATA_LPM_EMPTY); | |
3604 | } | |
6b7ae954 | 3605 | |
c2c7a89c TH |
3606 | /* Record and count probe trials on the ering. The specific |
3607 | * error mask used is irrelevant. Because a successful device | |
3608 | * detection clears the ering, this count accumulates only if | |
3609 | * there are consecutive failed probes. | |
3610 | * | |
3611 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3612 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3613 | * forced to 1.5Gbps. | |
3614 | * | |
3615 | * This is to work around cases where failed link speed | |
3616 | * negotiation results in device misdetection leading to | |
3617 | * infinite DEVXCHG or PHRDY CHG events. | |
3618 | */ | |
3619 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3620 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3621 | ||
3622 | if (trials > ATA_EH_PROBE_TRIALS) | |
3623 | sata_down_spd_limit(link, 1); | |
3624 | ||
02c05a27 TH |
3625 | return 1; |
3626 | } | |
3627 | ||
9b1e2658 | 3628 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3629 | { |
9af5c9c9 | 3630 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3631 | |
cf9a590a TH |
3632 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3633 | * The requester is responsible for ensuring forward progress. | |
3634 | */ | |
3635 | if (err != -EAGAIN) | |
3636 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3637 | |
3638 | switch (err) { | |
3639 | case -ENODEV: | |
3640 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3641 | ehc->i.probe_mask |= (1 << dev->devno); | |
3642 | case -EINVAL: | |
3643 | /* give it just one more chance */ | |
3644 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
3645 | case -EIO: | |
d89293ab | 3646 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3647 | /* This is the last chance, better to slow |
3648 | * down than lose it. | |
3649 | */ | |
a07d499b | 3650 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3651 | if (dev->pio_mode > XFER_PIO_0) |
3652 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3653 | } |
3654 | } | |
3655 | ||
3656 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3657 | /* disable device if it has used up all its chances */ | |
3658 | ata_dev_disable(dev); | |
3659 | ||
3660 | /* detach if offline */ | |
b1c72916 | 3661 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3662 | ata_eh_detach_dev(dev); |
3663 | ||
02c05a27 | 3664 | /* schedule probe if necessary */ |
87fbc5a0 | 3665 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3666 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3667 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3668 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3669 | } | |
9b1e2658 TH |
3670 | |
3671 | return 1; | |
fee7ca72 | 3672 | } else { |
cf480626 | 3673 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3674 | return 0; |
fee7ca72 TH |
3675 | } |
3676 | } | |
3677 | ||
022bdb07 TH |
3678 | /** |
3679 | * ata_eh_recover - recover host port after error | |
3680 | * @ap: host port to recover | |
f5914a46 | 3681 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3682 | * @softreset: softreset method (can be NULL) |
3683 | * @hardreset: hardreset method (can be NULL) | |
3684 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3685 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3686 | * |
3687 | * This is the alpha and omega, eum and yang, heart and soul of | |
3688 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3689 | * recover each link and hotplug requests are recorded in the |
3690 | * link's eh_context. This function executes all the operations | |
3691 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3692 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3693 | * |
3694 | * LOCKING: | |
3695 | * Kernel thread context (may sleep). | |
3696 | * | |
3697 | * RETURNS: | |
3698 | * 0 on success, -errno on failure. | |
3699 | */ | |
fb7fd614 TH |
3700 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3701 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3702 | ata_postreset_fn_t postreset, | |
3703 | struct ata_link **r_failed_link) | |
022bdb07 | 3704 | { |
9b1e2658 | 3705 | struct ata_link *link; |
022bdb07 | 3706 | struct ata_device *dev; |
6b7ae954 | 3707 | int rc, nr_fails; |
45fabbb7 | 3708 | unsigned long flags, deadline; |
022bdb07 TH |
3709 | |
3710 | DPRINTK("ENTER\n"); | |
3711 | ||
3712 | /* prep for recovery */ | |
1eca4365 | 3713 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3714 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3715 | |
f9df58cb TH |
3716 | /* re-enable link? */ |
3717 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3718 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3719 | spin_lock_irqsave(ap->lock, flags); | |
3720 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3721 | spin_unlock_irqrestore(ap->lock, flags); | |
3722 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3723 | } | |
3724 | ||
1eca4365 | 3725 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3726 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3727 | ehc->tries[dev->devno] = 1; | |
3728 | else | |
3729 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3730 | |
9b1e2658 TH |
3731 | /* collect port action mask recorded in dev actions */ |
3732 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3733 | ~ATA_EH_PERDEV_MASK; | |
3734 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3735 | ||
3736 | /* process hotplug request */ | |
3737 | if (dev->flags & ATA_DFLAG_DETACH) | |
3738 | ata_eh_detach_dev(dev); | |
3739 | ||
02c05a27 TH |
3740 | /* schedule probe if necessary */ |
3741 | if (!ata_dev_enabled(dev)) | |
3742 | ata_eh_schedule_probe(dev); | |
084fe639 | 3743 | } |
022bdb07 TH |
3744 | } |
3745 | ||
3746 | retry: | |
022bdb07 TH |
3747 | rc = 0; |
3748 | ||
aeb2ecd6 | 3749 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3750 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3751 | goto out; |
3752 | ||
9b1e2658 | 3753 | /* prep for EH */ |
1eca4365 | 3754 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3755 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3756 | |
9b1e2658 TH |
3757 | /* skip EH if possible. */ |
3758 | if (ata_eh_skip_recovery(link)) | |
3759 | ehc->i.action = 0; | |
3760 | ||
1eca4365 | 3761 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3762 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3763 | } | |
084fe639 | 3764 | |
022bdb07 | 3765 | /* reset */ |
1eca4365 | 3766 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3767 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3768 | |
dc98c32c TH |
3769 | if (!(ehc->i.action & ATA_EH_RESET)) |
3770 | continue; | |
9b1e2658 | 3771 | |
dc98c32c TH |
3772 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3773 | prereset, softreset, hardreset, postreset); | |
3774 | if (rc) { | |
a9a79dfe | 3775 | ata_link_err(link, "reset failed, giving up\n"); |
dc98c32c | 3776 | goto out; |
022bdb07 | 3777 | } |
022bdb07 TH |
3778 | } |
3779 | ||
45fabbb7 EO |
3780 | do { |
3781 | unsigned long now; | |
3782 | ||
3783 | /* | |
3784 | * clears ATA_EH_PARK in eh_info and resets | |
3785 | * ap->park_req_pending | |
3786 | */ | |
3787 | ata_eh_pull_park_action(ap); | |
3788 | ||
3789 | deadline = jiffies; | |
1eca4365 TH |
3790 | ata_for_each_link(link, ap, EDGE) { |
3791 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3792 | struct ata_eh_context *ehc = &link->eh_context; |
3793 | unsigned long tmp; | |
3794 | ||
3795 | if (dev->class != ATA_DEV_ATA) | |
3796 | continue; | |
3797 | if (!(ehc->i.dev_action[dev->devno] & | |
3798 | ATA_EH_PARK)) | |
3799 | continue; | |
3800 | tmp = dev->unpark_deadline; | |
3801 | if (time_before(deadline, tmp)) | |
3802 | deadline = tmp; | |
3803 | else if (time_before_eq(tmp, jiffies)) | |
3804 | continue; | |
3805 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3806 | continue; | |
3807 | ||
3808 | ata_eh_park_issue_cmd(dev, 1); | |
3809 | } | |
3810 | } | |
3811 | ||
3812 | now = jiffies; | |
3813 | if (time_before_eq(deadline, now)) | |
3814 | break; | |
3815 | ||
c0c362b6 | 3816 | ata_eh_release(ap); |
45fabbb7 EO |
3817 | deadline = wait_for_completion_timeout(&ap->park_req_pending, |
3818 | deadline - now); | |
c0c362b6 | 3819 | ata_eh_acquire(ap); |
45fabbb7 | 3820 | } while (deadline); |
1eca4365 TH |
3821 | ata_for_each_link(link, ap, EDGE) { |
3822 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3823 | if (!(link->eh_context.unloaded_mask & |
3824 | (1 << dev->devno))) | |
3825 | continue; | |
3826 | ||
3827 | ata_eh_park_issue_cmd(dev, 0); | |
3828 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3829 | } | |
3830 | } | |
3831 | ||
9b1e2658 | 3832 | /* the rest */ |
6b7ae954 TH |
3833 | nr_fails = 0; |
3834 | ata_for_each_link(link, ap, PMP_FIRST) { | |
9b1e2658 | 3835 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3836 | |
6b7ae954 TH |
3837 | if (sata_pmp_attached(ap) && ata_is_host_link(link)) |
3838 | goto config_lpm; | |
3839 | ||
9b1e2658 TH |
3840 | /* revalidate existing devices and attach new ones */ |
3841 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3842 | if (rc) |
6b7ae954 | 3843 | goto rest_fail; |
022bdb07 | 3844 | |
633273a3 TH |
3845 | /* if PMP got attached, return, pmp EH will take care of it */ |
3846 | if (link->device->class == ATA_DEV_PMP) { | |
3847 | ehc->i.action = 0; | |
3848 | return 0; | |
3849 | } | |
3850 | ||
9b1e2658 TH |
3851 | /* configure transfer mode if necessary */ |
3852 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3853 | rc = ata_set_mode(link, &dev); | |
3854 | if (rc) | |
6b7ae954 | 3855 | goto rest_fail; |
9b1e2658 TH |
3856 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
3857 | } | |
3858 | ||
11fc33da TH |
3859 | /* If reset has been issued, clear UA to avoid |
3860 | * disrupting the current users of the device. | |
3861 | */ | |
3862 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3863 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3864 | if (dev->class != ATA_DEV_ATAPI) |
3865 | continue; | |
3866 | rc = atapi_eh_clear_ua(dev); | |
3867 | if (rc) | |
6b7ae954 | 3868 | goto rest_fail; |
21334205 AL |
3869 | if (zpodd_dev_enabled(dev)) |
3870 | zpodd_post_poweron(dev); | |
11fc33da TH |
3871 | } |
3872 | } | |
3873 | ||
6013efd8 TH |
3874 | /* retry flush if necessary */ |
3875 | ata_for_each_dev(dev, link, ALL) { | |
3876 | if (dev->class != ATA_DEV_ATA) | |
3877 | continue; | |
3878 | rc = ata_eh_maybe_retry_flush(dev); | |
3879 | if (rc) | |
6b7ae954 | 3880 | goto rest_fail; |
6013efd8 TH |
3881 | } |
3882 | ||
6b7ae954 | 3883 | config_lpm: |
11fc33da | 3884 | /* configure link power saving */ |
6b7ae954 TH |
3885 | if (link->lpm_policy != ap->target_lpm_policy) { |
3886 | rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev); | |
3887 | if (rc) | |
3888 | goto rest_fail; | |
3889 | } | |
ca77329f | 3890 | |
9b1e2658 TH |
3891 | /* this link is okay now */ |
3892 | ehc->i.flags = 0; | |
3893 | continue; | |
022bdb07 | 3894 | |
6b7ae954 TH |
3895 | rest_fail: |
3896 | nr_fails++; | |
3897 | if (dev) | |
3898 | ata_eh_handle_dev_fail(dev, rc); | |
022bdb07 | 3899 | |
b06ce3e5 TH |
3900 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3901 | /* PMP reset requires working host port. | |
3902 | * Can't retry if it's frozen. | |
3903 | */ | |
071f44b1 | 3904 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3905 | goto out; |
9b1e2658 | 3906 | break; |
b06ce3e5 | 3907 | } |
022bdb07 TH |
3908 | } |
3909 | ||
6b7ae954 | 3910 | if (nr_fails) |
9b1e2658 | 3911 | goto retry; |
022bdb07 | 3912 | |
9b1e2658 TH |
3913 | out: |
3914 | if (rc && r_failed_link) | |
3915 | *r_failed_link = link; | |
3916 | ||
022bdb07 TH |
3917 | DPRINTK("EXIT, rc=%d\n", rc); |
3918 | return rc; | |
3919 | } | |
3920 | ||
3921 | /** | |
3922 | * ata_eh_finish - finish up EH | |
3923 | * @ap: host port to finish EH for | |
3924 | * | |
3925 | * Recovery is complete. Clean up EH states and retry or finish | |
3926 | * failed qcs. | |
3927 | * | |
3928 | * LOCKING: | |
3929 | * None. | |
3930 | */ | |
fb7fd614 | 3931 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
3932 | { |
3933 | int tag; | |
3934 | ||
3935 | /* retry or finish qcs */ | |
3936 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
3937 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
3938 | ||
3939 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
3940 | continue; | |
3941 | ||
3942 | if (qc->err_mask) { | |
3943 | /* FIXME: Once EH migration is complete, | |
3944 | * generate sense data in this function, | |
3945 | * considering both err_mask and tf. | |
3946 | */ | |
03faab78 | 3947 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3948 | ata_eh_qc_retry(qc); |
03faab78 TH |
3949 | else |
3950 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3951 | } else { |
3952 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3953 | ata_eh_qc_complete(qc); | |
3954 | } else { | |
3955 | /* feed zero TF to sense generation */ | |
3956 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3957 | ata_eh_qc_retry(qc); | |
3958 | } | |
3959 | } | |
3960 | } | |
da917d69 TH |
3961 | |
3962 | /* make sure nr_active_links is zero after EH */ | |
3963 | WARN_ON(ap->nr_active_links); | |
3964 | ap->nr_active_links = 0; | |
022bdb07 TH |
3965 | } |
3966 | ||
3967 | /** | |
3968 | * ata_do_eh - do standard error handling | |
3969 | * @ap: host port to handle error for | |
a1efdaba | 3970 | * |
f5914a46 | 3971 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3972 | * @softreset: softreset method (can be NULL) |
3973 | * @hardreset: hardreset method (can be NULL) | |
3974 | * @postreset: postreset method (can be NULL) | |
3975 | * | |
3976 | * Perform standard error handling sequence. | |
3977 | * | |
3978 | * LOCKING: | |
3979 | * Kernel thread context (may sleep). | |
3980 | */ | |
f5914a46 TH |
3981 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3982 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3983 | ata_postreset_fn_t postreset) | |
022bdb07 | 3984 | { |
9b1e2658 TH |
3985 | struct ata_device *dev; |
3986 | int rc; | |
3987 | ||
3988 | ata_eh_autopsy(ap); | |
3989 | ata_eh_report(ap); | |
3990 | ||
3991 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3992 | NULL); | |
3993 | if (rc) { | |
1eca4365 | 3994 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
3995 | ata_dev_disable(dev); |
3996 | } | |
3997 | ||
022bdb07 TH |
3998 | ata_eh_finish(ap); |
3999 | } | |
500530f6 | 4000 | |
a1efdaba TH |
4001 | /** |
4002 | * ata_std_error_handler - standard error handler | |
4003 | * @ap: host port to handle error for | |
4004 | * | |
4005 | * Standard error handler | |
4006 | * | |
4007 | * LOCKING: | |
4008 | * Kernel thread context (may sleep). | |
4009 | */ | |
4010 | void ata_std_error_handler(struct ata_port *ap) | |
4011 | { | |
4012 | struct ata_port_operations *ops = ap->ops; | |
4013 | ata_reset_fn_t hardreset = ops->hardreset; | |
4014 | ||
57c9efdf | 4015 | /* ignore built-in hardreset if SCR access is not available */ |
fe06e5f9 | 4016 | if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) |
a1efdaba TH |
4017 | hardreset = NULL; |
4018 | ||
4019 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
4020 | } | |
4021 | ||
6ffa01d8 | 4022 | #ifdef CONFIG_PM |
500530f6 TH |
4023 | /** |
4024 | * ata_eh_handle_port_suspend - perform port suspend operation | |
4025 | * @ap: port to suspend | |
4026 | * | |
4027 | * Suspend @ap. | |
4028 | * | |
4029 | * LOCKING: | |
4030 | * Kernel thread context (may sleep). | |
4031 | */ | |
4032 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
4033 | { | |
4034 | unsigned long flags; | |
4035 | int rc = 0; | |
3dc67440 | 4036 | struct ata_device *dev; |
500530f6 TH |
4037 | |
4038 | /* are we suspending? */ | |
4039 | spin_lock_irqsave(ap->lock, flags); | |
4040 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 4041 | ap->pm_mesg.event & PM_EVENT_RESUME) { |
500530f6 TH |
4042 | spin_unlock_irqrestore(ap->lock, flags); |
4043 | return; | |
4044 | } | |
4045 | spin_unlock_irqrestore(ap->lock, flags); | |
4046 | ||
4047 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
4048 | ||
3dc67440 AL |
4049 | /* |
4050 | * If we have a ZPODD attached, check its zero | |
4051 | * power ready status before the port is frozen. | |
a7ff60db | 4052 | * Only needed for runtime suspend. |
3dc67440 | 4053 | */ |
a7ff60db AL |
4054 | if (PMSG_IS_AUTO(ap->pm_mesg)) { |
4055 | ata_for_each_dev(dev, &ap->link, ENABLED) { | |
4056 | if (zpodd_dev_enabled(dev)) | |
4057 | zpodd_on_suspend(dev); | |
4058 | } | |
3dc67440 AL |
4059 | } |
4060 | ||
64578a3d TH |
4061 | /* tell ACPI we're suspending */ |
4062 | rc = ata_acpi_on_suspend(ap); | |
4063 | if (rc) | |
4064 | goto out; | |
4065 | ||
500530f6 TH |
4066 | /* suspend */ |
4067 | ata_eh_freeze_port(ap); | |
4068 | ||
4069 | if (ap->ops->port_suspend) | |
4070 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
4071 | ||
a7ff60db | 4072 | ata_acpi_set_state(ap, ap->pm_mesg); |
64578a3d | 4073 | out: |
bc6e7c4b | 4074 | /* update the flags */ |
500530f6 TH |
4075 | spin_lock_irqsave(ap->lock, flags); |
4076 | ||
4077 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
4078 | if (rc == 0) | |
4079 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 4080 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
4081 | ata_port_schedule_eh(ap); |
4082 | ||
500530f6 TH |
4083 | spin_unlock_irqrestore(ap->lock, flags); |
4084 | ||
4085 | return; | |
4086 | } | |
4087 | ||
4088 | /** | |
4089 | * ata_eh_handle_port_resume - perform port resume operation | |
4090 | * @ap: port to resume | |
4091 | * | |
4092 | * Resume @ap. | |
4093 | * | |
500530f6 TH |
4094 | * LOCKING: |
4095 | * Kernel thread context (may sleep). | |
4096 | */ | |
4097 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
4098 | { | |
6f9c1ea2 TH |
4099 | struct ata_link *link; |
4100 | struct ata_device *dev; | |
500530f6 | 4101 | unsigned long flags; |
9666f400 | 4102 | int rc = 0; |
500530f6 TH |
4103 | |
4104 | /* are we resuming? */ | |
4105 | spin_lock_irqsave(ap->lock, flags); | |
4106 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 4107 | !(ap->pm_mesg.event & PM_EVENT_RESUME)) { |
500530f6 TH |
4108 | spin_unlock_irqrestore(ap->lock, flags); |
4109 | return; | |
4110 | } | |
4111 | spin_unlock_irqrestore(ap->lock, flags); | |
4112 | ||
9666f400 | 4113 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 4114 | |
6f9c1ea2 TH |
4115 | /* |
4116 | * Error timestamps are in jiffies which doesn't run while | |
4117 | * suspended and PHY events during resume isn't too uncommon. | |
4118 | * When the two are combined, it can lead to unnecessary speed | |
4119 | * downs if the machine is suspended and resumed repeatedly. | |
4120 | * Clear error history. | |
4121 | */ | |
4122 | ata_for_each_link(link, ap, HOST_FIRST) | |
4123 | ata_for_each_dev(dev, link, ALL) | |
4124 | ata_ering_clear(&dev->ering); | |
4125 | ||
a7ff60db | 4126 | ata_acpi_set_state(ap, ap->pm_mesg); |
bd3adca5 | 4127 | |
500530f6 TH |
4128 | if (ap->ops->port_resume) |
4129 | rc = ap->ops->port_resume(ap); | |
4130 | ||
6746544c TH |
4131 | /* tell ACPI that we're resuming */ |
4132 | ata_acpi_on_resume(ap); | |
4133 | ||
bc6e7c4b | 4134 | /* update the flags */ |
500530f6 TH |
4135 | spin_lock_irqsave(ap->lock, flags); |
4136 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
500530f6 TH |
4137 | spin_unlock_irqrestore(ap->lock, flags); |
4138 | } | |
6ffa01d8 | 4139 | #endif /* CONFIG_PM */ |