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 | ||
255c03d1 | 49 | #include <trace/events/libata.h> |
ece1d636 TH |
50 | #include "libata.h" |
51 | ||
7d47e8d4 | 52 | enum { |
3884f7b0 | 53 | /* speed down verdicts */ |
7d47e8d4 TH |
54 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
55 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
56 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 57 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
58 | |
59 | /* error flags */ | |
60 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 61 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
d9027470 | 62 | ATA_EFLAG_OLD_ER = (1 << 31), |
3884f7b0 TH |
63 | |
64 | /* error categories */ | |
65 | ATA_ECAT_NONE = 0, | |
66 | ATA_ECAT_ATA_BUS = 1, | |
67 | ATA_ECAT_TOUT_HSM = 2, | |
68 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
69 | ATA_ECAT_DUBIOUS_NONE = 4, |
70 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
71 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
72 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
73 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 74 | |
87fbc5a0 TH |
75 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
76 | ||
0a2c0f56 TH |
77 | /* always put at least this amount of time between resets */ |
78 | ATA_EH_RESET_COOL_DOWN = 5000, | |
79 | ||
341c2c95 TH |
80 | /* Waiting in ->prereset can never be reliable. It's |
81 | * sometimes nice to wait there but it can't be depended upon; | |
82 | * otherwise, we wouldn't be resetting. Just give it enough | |
83 | * time for most drives to spin up. | |
84 | */ | |
85 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
86 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
87 | |
88 | ATA_EH_UA_TRIES = 5, | |
c2c7a89c TH |
89 | |
90 | /* probe speed down parameters, see ata_eh_schedule_probe() */ | |
91 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ | |
92 | ATA_EH_PROBE_TRIALS = 2, | |
31daabda TH |
93 | }; |
94 | ||
95 | /* The following table determines how we sequence resets. Each entry | |
96 | * represents timeout for that try. The first try can be soft or | |
97 | * hardreset. All others are hardreset if available. In most cases | |
98 | * the first reset w/ 10sec timeout should succeed. Following entries | |
35bf8821 DW |
99 | * are mostly for error handling, hotplug and those outlier devices that |
100 | * take an exceptionally long time to recover from reset. | |
31daabda TH |
101 | */ |
102 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
103 | 10000, /* most drives spin up by 10sec */ |
104 | 10000, /* > 99% working drives spin up before 20sec */ | |
35bf8821 | 105 | 35000, /* give > 30 secs of idleness for outlier devices */ |
341c2c95 | 106 | 5000, /* and sweet one last chance */ |
d8af0eb6 | 107 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
108 | }; |
109 | ||
87fbc5a0 TH |
110 | static const unsigned long ata_eh_identify_timeouts[] = { |
111 | 5000, /* covers > 99% of successes and not too boring on failures */ | |
112 | 10000, /* combined time till here is enough even for media access */ | |
113 | 30000, /* for true idiots */ | |
114 | ULONG_MAX, | |
115 | }; | |
116 | ||
6013efd8 TH |
117 | static const unsigned long ata_eh_flush_timeouts[] = { |
118 | 15000, /* be generous with flush */ | |
119 | 15000, /* ditto */ | |
120 | 30000, /* and even more generous */ | |
121 | ULONG_MAX, | |
122 | }; | |
123 | ||
87fbc5a0 TH |
124 | static const unsigned long ata_eh_other_timeouts[] = { |
125 | 5000, /* same rationale as identify timeout */ | |
126 | 10000, /* ditto */ | |
127 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
128 | ULONG_MAX, | |
129 | }; | |
130 | ||
131 | struct ata_eh_cmd_timeout_ent { | |
132 | const u8 *commands; | |
133 | const unsigned long *timeouts; | |
134 | }; | |
135 | ||
136 | /* The following table determines timeouts to use for EH internal | |
137 | * commands. Each table entry is a command class and matches the | |
138 | * commands the entry applies to and the timeout table to use. | |
139 | * | |
140 | * On the retry after a command timed out, the next timeout value from | |
141 | * the table is used. If the table doesn't contain further entries, | |
142 | * the last value is used. | |
143 | * | |
144 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
145 | * command class, so if SET_FEATURES times out on the first try, the | |
146 | * next try will use the second timeout value only for that class. | |
147 | */ | |
148 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
149 | static const struct ata_eh_cmd_timeout_ent | |
150 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
151 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
152 | .timeouts = ata_eh_identify_timeouts, }, | |
153 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), | |
154 | .timeouts = ata_eh_other_timeouts, }, | |
155 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
156 | .timeouts = ata_eh_other_timeouts, }, | |
157 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
158 | .timeouts = ata_eh_other_timeouts, }, | |
159 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
160 | .timeouts = ata_eh_other_timeouts, }, | |
6013efd8 TH |
161 | { .commands = CMDS(ATA_CMD_FLUSH, ATA_CMD_FLUSH_EXT), |
162 | .timeouts = ata_eh_flush_timeouts }, | |
87fbc5a0 TH |
163 | }; |
164 | #undef CMDS | |
165 | ||
ad9e2762 | 166 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 167 | #ifdef CONFIG_PM |
500530f6 TH |
168 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
169 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
170 | #else /* CONFIG_PM */ |
171 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
172 | { } | |
173 | ||
174 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
175 | { } | |
6ffa01d8 | 176 | #endif /* CONFIG_PM */ |
ad9e2762 | 177 | |
b64bbc39 TH |
178 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
179 | va_list args) | |
180 | { | |
181 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
182 | ATA_EH_DESC_LEN - ehi->desc_len, | |
183 | fmt, args); | |
184 | } | |
185 | ||
186 | /** | |
187 | * __ata_ehi_push_desc - push error description without adding separator | |
188 | * @ehi: target EHI | |
189 | * @fmt: printf format string | |
190 | * | |
191 | * Format string according to @fmt and append it to @ehi->desc. | |
192 | * | |
193 | * LOCKING: | |
194 | * spin_lock_irqsave(host lock) | |
195 | */ | |
196 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
197 | { | |
198 | va_list args; | |
199 | ||
200 | va_start(args, fmt); | |
201 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
202 | va_end(args); | |
203 | } | |
204 | ||
205 | /** | |
206 | * ata_ehi_push_desc - push error description with separator | |
207 | * @ehi: target EHI | |
208 | * @fmt: printf format string | |
209 | * | |
210 | * Format string according to @fmt and append it to @ehi->desc. | |
211 | * If @ehi->desc is not empty, ", " is added in-between. | |
212 | * | |
213 | * LOCKING: | |
214 | * spin_lock_irqsave(host lock) | |
215 | */ | |
216 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
217 | { | |
218 | va_list args; | |
219 | ||
220 | if (ehi->desc_len) | |
221 | __ata_ehi_push_desc(ehi, ", "); | |
222 | ||
223 | va_start(args, fmt); | |
224 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
225 | va_end(args); | |
226 | } | |
227 | ||
228 | /** | |
229 | * ata_ehi_clear_desc - clean error description | |
230 | * @ehi: target EHI | |
231 | * | |
232 | * Clear @ehi->desc. | |
233 | * | |
234 | * LOCKING: | |
235 | * spin_lock_irqsave(host lock) | |
236 | */ | |
237 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
238 | { | |
239 | ehi->desc[0] = '\0'; | |
240 | ehi->desc_len = 0; | |
241 | } | |
242 | ||
cbcdd875 TH |
243 | /** |
244 | * ata_port_desc - append port description | |
245 | * @ap: target ATA port | |
246 | * @fmt: printf format string | |
247 | * | |
248 | * Format string according to @fmt and append it to port | |
249 | * description. If port description is not empty, " " is added | |
250 | * in-between. This function is to be used while initializing | |
251 | * ata_host. The description is printed on host registration. | |
252 | * | |
253 | * LOCKING: | |
254 | * None. | |
255 | */ | |
256 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
257 | { | |
258 | va_list args; | |
259 | ||
260 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
261 | ||
262 | if (ap->link.eh_info.desc_len) | |
263 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
264 | ||
265 | va_start(args, fmt); | |
266 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
267 | va_end(args); | |
268 | } | |
269 | ||
270 | #ifdef CONFIG_PCI | |
271 | ||
272 | /** | |
273 | * ata_port_pbar_desc - append PCI BAR description | |
274 | * @ap: target ATA port | |
275 | * @bar: target PCI BAR | |
276 | * @offset: offset into PCI BAR | |
277 | * @name: name of the area | |
278 | * | |
279 | * If @offset is negative, this function formats a string which | |
280 | * contains the name, address, size and type of the BAR and | |
281 | * appends it to the port description. If @offset is zero or | |
282 | * positive, only name and offsetted address is appended. | |
283 | * | |
284 | * LOCKING: | |
285 | * None. | |
286 | */ | |
287 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
288 | const char *name) | |
289 | { | |
290 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
291 | char *type = ""; | |
292 | unsigned long long start, len; | |
293 | ||
294 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
295 | type = "m"; | |
296 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
297 | type = "i"; | |
298 | ||
299 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
300 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
301 | ||
302 | if (offset < 0) | |
303 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
304 | else | |
e6a73ab1 AM |
305 | ata_port_desc(ap, "%s 0x%llx", name, |
306 | start + (unsigned long long)offset); | |
cbcdd875 TH |
307 | } |
308 | ||
309 | #endif /* CONFIG_PCI */ | |
310 | ||
87fbc5a0 TH |
311 | static int ata_lookup_timeout_table(u8 cmd) |
312 | { | |
313 | int i; | |
314 | ||
315 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
316 | const u8 *cur; | |
317 | ||
318 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
319 | if (*cur == cmd) | |
320 | return i; | |
321 | } | |
322 | ||
323 | return -1; | |
324 | } | |
325 | ||
326 | /** | |
327 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
328 | * @dev: target device | |
329 | * @cmd: internal command to be issued | |
330 | * | |
331 | * Determine timeout for internal command @cmd for @dev. | |
332 | * | |
333 | * LOCKING: | |
334 | * EH context. | |
335 | * | |
336 | * RETURNS: | |
337 | * Determined timeout. | |
338 | */ | |
339 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) | |
340 | { | |
341 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
342 | int ent = ata_lookup_timeout_table(cmd); | |
343 | int idx; | |
344 | ||
345 | if (ent < 0) | |
346 | return ATA_EH_CMD_DFL_TIMEOUT; | |
347 | ||
348 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
349 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
350 | } | |
351 | ||
352 | /** | |
353 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
354 | * @dev: target device | |
355 | * @cmd: internal command which timed out | |
356 | * | |
357 | * Notify EH that internal command @cmd for @dev timed out. This | |
358 | * function should be called only for commands whose timeouts are | |
359 | * determined using ata_internal_cmd_timeout(). | |
360 | * | |
361 | * LOCKING: | |
362 | * EH context. | |
363 | */ | |
364 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
365 | { | |
366 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
367 | int ent = ata_lookup_timeout_table(cmd); | |
368 | int idx; | |
369 | ||
370 | if (ent < 0) | |
371 | return; | |
372 | ||
373 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
374 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) | |
375 | ehc->cmd_timeout_idx[dev->devno][ent]++; | |
376 | } | |
377 | ||
3884f7b0 | 378 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
379 | unsigned int err_mask) |
380 | { | |
381 | struct ata_ering_entry *ent; | |
382 | ||
383 | WARN_ON(!err_mask); | |
384 | ||
385 | ering->cursor++; | |
386 | ering->cursor %= ATA_ERING_SIZE; | |
387 | ||
388 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 389 | ent->eflags = eflags; |
0c247c55 TH |
390 | ent->err_mask = err_mask; |
391 | ent->timestamp = get_jiffies_64(); | |
392 | } | |
393 | ||
76326ac1 TH |
394 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
395 | { | |
396 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
397 | ||
398 | if (ent->err_mask) | |
399 | return ent; | |
400 | return NULL; | |
401 | } | |
402 | ||
d9027470 GG |
403 | int ata_ering_map(struct ata_ering *ering, |
404 | int (*map_fn)(struct ata_ering_entry *, void *), | |
405 | void *arg) | |
0c247c55 TH |
406 | { |
407 | int idx, rc = 0; | |
408 | struct ata_ering_entry *ent; | |
409 | ||
410 | idx = ering->cursor; | |
411 | do { | |
412 | ent = &ering->ring[idx]; | |
413 | if (!ent->err_mask) | |
414 | break; | |
415 | rc = map_fn(ent, arg); | |
416 | if (rc) | |
417 | break; | |
418 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
419 | } while (idx != ering->cursor); | |
420 | ||
421 | return rc; | |
422 | } | |
423 | ||
60428407 | 424 | static int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg) |
d9027470 GG |
425 | { |
426 | ent->eflags |= ATA_EFLAG_OLD_ER; | |
427 | return 0; | |
428 | } | |
429 | ||
430 | static void ata_ering_clear(struct ata_ering *ering) | |
431 | { | |
432 | ata_ering_map(ering, ata_ering_clear_cb, NULL); | |
433 | } | |
434 | ||
64f65ca6 TH |
435 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
436 | { | |
9af5c9c9 | 437 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
438 | |
439 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
440 | } | |
441 | ||
f58229f8 | 442 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
443 | struct ata_eh_info *ehi, unsigned int action) |
444 | { | |
f58229f8 | 445 | struct ata_device *tdev; |
af181c2d TH |
446 | |
447 | if (!dev) { | |
448 | ehi->action &= ~action; | |
1eca4365 | 449 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 450 | ehi->dev_action[tdev->devno] &= ~action; |
af181c2d TH |
451 | } else { |
452 | /* doesn't make sense for port-wide EH actions */ | |
453 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
454 | ||
455 | /* break ehi->action into ehi->dev_action */ | |
456 | if (ehi->action & action) { | |
1eca4365 | 457 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
458 | ehi->dev_action[tdev->devno] |= |
459 | ehi->action & action; | |
af181c2d TH |
460 | ehi->action &= ~action; |
461 | } | |
462 | ||
463 | /* turn off the specified per-dev action */ | |
464 | ehi->dev_action[dev->devno] &= ~action; | |
465 | } | |
466 | } | |
467 | ||
c0c362b6 TH |
468 | /** |
469 | * ata_eh_acquire - acquire EH ownership | |
470 | * @ap: ATA port to acquire EH ownership for | |
471 | * | |
472 | * Acquire EH ownership for @ap. This is the basic exclusion | |
473 | * mechanism for ports sharing a host. Only one port hanging off | |
474 | * the same host can claim the ownership of EH. | |
475 | * | |
476 | * LOCKING: | |
477 | * EH context. | |
478 | */ | |
479 | void ata_eh_acquire(struct ata_port *ap) | |
480 | { | |
481 | mutex_lock(&ap->host->eh_mutex); | |
482 | WARN_ON_ONCE(ap->host->eh_owner); | |
483 | ap->host->eh_owner = current; | |
484 | } | |
485 | ||
486 | /** | |
487 | * ata_eh_release - release EH ownership | |
488 | * @ap: ATA port to release EH ownership for | |
489 | * | |
490 | * Release EH ownership for @ap if the caller. The caller must | |
491 | * have acquired EH ownership using ata_eh_acquire() previously. | |
492 | * | |
493 | * LOCKING: | |
494 | * EH context. | |
495 | */ | |
496 | void ata_eh_release(struct ata_port *ap) | |
497 | { | |
498 | WARN_ON_ONCE(ap->host->eh_owner != current); | |
499 | ap->host->eh_owner = NULL; | |
500 | mutex_unlock(&ap->host->eh_mutex); | |
501 | } | |
502 | ||
ece1d636 TH |
503 | /** |
504 | * ata_scsi_timed_out - SCSI layer time out callback | |
505 | * @cmd: timed out SCSI command | |
506 | * | |
507 | * Handles SCSI layer timeout. We race with normal completion of | |
508 | * the qc for @cmd. If the qc is already gone, we lose and let | |
509 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has | |
510 | * timed out and EH should be invoked. Prevent ata_qc_complete() | |
511 | * from finishing it by setting EH_SCHEDULED and return | |
512 | * EH_NOT_HANDLED. | |
513 | * | |
ad9e2762 TH |
514 | * TODO: kill this function once old EH is gone. |
515 | * | |
ece1d636 TH |
516 | * LOCKING: |
517 | * Called from timer context | |
518 | * | |
519 | * RETURNS: | |
520 | * EH_HANDLED or EH_NOT_HANDLED | |
521 | */ | |
242f9dcb | 522 | enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) |
ece1d636 TH |
523 | { |
524 | struct Scsi_Host *host = cmd->device->host; | |
35bb94b1 | 525 | struct ata_port *ap = ata_shost_to_port(host); |
ece1d636 TH |
526 | unsigned long flags; |
527 | struct ata_queued_cmd *qc; | |
242f9dcb | 528 | enum blk_eh_timer_return ret; |
ece1d636 TH |
529 | |
530 | DPRINTK("ENTER\n"); | |
531 | ||
ad9e2762 | 532 | if (ap->ops->error_handler) { |
242f9dcb | 533 | ret = BLK_EH_NOT_HANDLED; |
ad9e2762 TH |
534 | goto out; |
535 | } | |
536 | ||
242f9dcb | 537 | ret = BLK_EH_HANDLED; |
ba6a1308 | 538 | spin_lock_irqsave(ap->lock, flags); |
9af5c9c9 | 539 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
ece1d636 TH |
540 | if (qc) { |
541 | WARN_ON(qc->scsicmd != cmd); | |
542 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; | |
543 | qc->err_mask |= AC_ERR_TIMEOUT; | |
242f9dcb | 544 | ret = BLK_EH_NOT_HANDLED; |
ece1d636 | 545 | } |
ba6a1308 | 546 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 547 | |
ad9e2762 | 548 | out: |
ece1d636 TH |
549 | DPRINTK("EXIT, ret=%d\n", ret); |
550 | return ret; | |
551 | } | |
b6a05c82 | 552 | EXPORT_SYMBOL(ata_scsi_timed_out); |
ece1d636 | 553 | |
ece180d1 TH |
554 | static void ata_eh_unload(struct ata_port *ap) |
555 | { | |
556 | struct ata_link *link; | |
557 | struct ata_device *dev; | |
558 | unsigned long flags; | |
559 | ||
560 | /* Restore SControl IPM and SPD for the next driver and | |
561 | * disable attached devices. | |
562 | */ | |
563 | ata_for_each_link(link, ap, PMP_FIRST) { | |
564 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
565 | ata_for_each_dev(dev, link, ALL) | |
566 | ata_dev_disable(dev); | |
567 | } | |
568 | ||
569 | /* freeze and set UNLOADED */ | |
570 | spin_lock_irqsave(ap->lock, flags); | |
571 | ||
572 | ata_port_freeze(ap); /* won't be thawed */ | |
573 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
574 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
575 | ||
576 | spin_unlock_irqrestore(ap->lock, flags); | |
577 | } | |
578 | ||
ece1d636 TH |
579 | /** |
580 | * ata_scsi_error - SCSI layer error handler callback | |
581 | * @host: SCSI host on which error occurred | |
582 | * | |
583 | * Handles SCSI-layer-thrown error events. | |
584 | * | |
585 | * LOCKING: | |
586 | * Inherited from SCSI layer (none, can sleep) | |
587 | * | |
588 | * RETURNS: | |
589 | * Zero. | |
590 | */ | |
381544bb | 591 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 592 | { |
35bb94b1 | 593 | struct ata_port *ap = ata_shost_to_port(host); |
ad9e2762 | 594 | unsigned long flags; |
c34aeebc | 595 | LIST_HEAD(eh_work_q); |
ece1d636 TH |
596 | |
597 | DPRINTK("ENTER\n"); | |
598 | ||
c34aeebc JB |
599 | spin_lock_irqsave(host->host_lock, flags); |
600 | list_splice_init(&host->eh_cmd_q, &eh_work_q); | |
601 | spin_unlock_irqrestore(host->host_lock, flags); | |
602 | ||
0e0b494c JB |
603 | ata_scsi_cmd_error_handler(host, ap, &eh_work_q); |
604 | ||
605 | /* If we timed raced normal completion and there is nothing to | |
606 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ | |
607 | ata_scsi_port_error_handler(host, ap); | |
608 | ||
609 | /* finish or retry handled scmd's and clean up */ | |
72d8c36e | 610 | WARN_ON(!list_empty(&eh_work_q)); |
0e0b494c JB |
611 | |
612 | DPRINTK("EXIT\n"); | |
613 | } | |
614 | ||
615 | /** | |
616 | * ata_scsi_cmd_error_handler - error callback for a list of commands | |
617 | * @host: scsi host containing the port | |
618 | * @ap: ATA port within the host | |
619 | * @eh_work_q: list of commands to process | |
620 | * | |
621 | * process the given list of commands and return those finished to the | |
622 | * ap->eh_done_q. This function is the first part of the libata error | |
623 | * handler which processes a given list of failed commands. | |
624 | */ | |
625 | void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, | |
626 | struct list_head *eh_work_q) | |
627 | { | |
628 | int i; | |
629 | unsigned long flags; | |
630 | ||
c429137a TH |
631 | /* make sure sff pio task is not running */ |
632 | ata_sff_flush_pio_task(ap); | |
ece1d636 | 633 | |
cca3974e | 634 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
635 | |
636 | /* For new EH, all qcs are finished in one of three ways - | |
637 | * normal completion, error completion, and SCSI timeout. | |
c96f1732 | 638 | * Both completions can race against SCSI timeout. When normal |
ad9e2762 TH |
639 | * completion wins, the qc never reaches EH. When error |
640 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
641 | * | |
642 | * When SCSI timeout wins, things are a bit more complex. | |
643 | * Normal or error completion can occur after the timeout but | |
644 | * before this point. In such cases, both types of | |
645 | * completions are honored. A scmd is determined to have | |
646 | * timed out iff its associated qc is active and not failed. | |
647 | */ | |
648 | if (ap->ops->error_handler) { | |
649 | struct scsi_cmnd *scmd, *tmp; | |
650 | int nr_timedout = 0; | |
651 | ||
e30349d2 | 652 | spin_lock_irqsave(ap->lock, flags); |
d9027470 | 653 | |
c96f1732 AC |
654 | /* This must occur under the ap->lock as we don't want |
655 | a polled recovery to race the real interrupt handler | |
d9027470 | 656 | |
c96f1732 AC |
657 | The lost_interrupt handler checks for any completed but |
658 | non-notified command and completes much like an IRQ handler. | |
d9027470 | 659 | |
c96f1732 AC |
660 | We then fall into the error recovery code which will treat |
661 | this as if normal completion won the race */ | |
662 | ||
663 | if (ap->ops->lost_interrupt) | |
664 | ap->ops->lost_interrupt(ap); | |
d9027470 | 665 | |
0e0b494c | 666 | list_for_each_entry_safe(scmd, tmp, eh_work_q, eh_entry) { |
ad9e2762 TH |
667 | struct ata_queued_cmd *qc; |
668 | ||
669 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
670 | qc = __ata_qc_from_tag(ap, i); | |
671 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
672 | qc->scsicmd == scmd) | |
673 | break; | |
674 | } | |
675 | ||
676 | if (i < ATA_MAX_QUEUE) { | |
677 | /* the scmd has an associated qc */ | |
678 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
679 | /* which hasn't failed yet, timeout */ | |
680 | qc->err_mask |= AC_ERR_TIMEOUT; | |
681 | qc->flags |= ATA_QCFLAG_FAILED; | |
682 | nr_timedout++; | |
683 | } | |
684 | } else { | |
685 | /* Normal completion occurred after | |
686 | * SCSI timeout but before this point. | |
687 | * Successfully complete it. | |
688 | */ | |
689 | scmd->retries = scmd->allowed; | |
690 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
691 | } | |
692 | } | |
693 | ||
694 | /* If we have timed out qcs. They belong to EH from | |
695 | * this point but the state of the controller is | |
696 | * unknown. Freeze the port to make sure the IRQ | |
697 | * handler doesn't diddle with those qcs. This must | |
698 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
699 | */ | |
700 | if (nr_timedout) | |
701 | __ata_port_freeze(ap); | |
702 | ||
e30349d2 | 703 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
704 | |
705 | /* initialize eh_tries */ | |
706 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 707 | } else |
e30349d2 | 708 | spin_unlock_wait(ap->lock); |
d9027470 | 709 | |
0e0b494c JB |
710 | } |
711 | EXPORT_SYMBOL(ata_scsi_cmd_error_handler); | |
712 | ||
713 | /** | |
714 | * ata_scsi_port_error_handler - recover the port after the commands | |
715 | * @host: SCSI host containing the port | |
716 | * @ap: the ATA port | |
717 | * | |
718 | * Handle the recovery of the port @ap after all the commands | |
719 | * have been recovered. | |
720 | */ | |
721 | void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap) | |
722 | { | |
723 | unsigned long flags; | |
ad9e2762 | 724 | |
ad9e2762 TH |
725 | /* invoke error handler */ |
726 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
727 | struct ata_link *link; |
728 | ||
c0c362b6 TH |
729 | /* acquire EH ownership */ |
730 | ata_eh_acquire(ap); | |
731 | repeat: | |
5ddf24c5 TH |
732 | /* kill fast drain timer */ |
733 | del_timer_sync(&ap->fastdrain_timer); | |
734 | ||
500530f6 TH |
735 | /* process port resume request */ |
736 | ata_eh_handle_port_resume(ap); | |
737 | ||
f3e81b19 | 738 | /* fetch & clear EH info */ |
e30349d2 | 739 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 740 | |
1eca4365 | 741 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
742 | struct ata_eh_context *ehc = &link->eh_context; |
743 | struct ata_device *dev; | |
744 | ||
cf1b86c8 TH |
745 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
746 | link->eh_context.i = link->eh_info; | |
747 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 748 | |
1eca4365 | 749 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
750 | int devno = dev->devno; |
751 | ||
752 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
753 | if (ata_ncq_enabled(dev)) | |
754 | ehc->saved_ncq_enabled |= 1 << devno; | |
755 | } | |
cf1b86c8 | 756 | } |
f3e81b19 | 757 | |
b51e9e5d TH |
758 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
759 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 760 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 761 | |
e30349d2 | 762 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 763 | |
500530f6 TH |
764 | /* invoke EH, skip if unloading or suspended */ |
765 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 766 | ap->ops->error_handler(ap); |
ece180d1 TH |
767 | else { |
768 | /* if unloading, commence suicide */ | |
769 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
770 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
771 | ata_eh_unload(ap); | |
720ba126 | 772 | ata_eh_finish(ap); |
ece180d1 | 773 | } |
ad9e2762 | 774 | |
500530f6 TH |
775 | /* process port suspend request */ |
776 | ata_eh_handle_port_suspend(ap); | |
777 | ||
25985edc | 778 | /* Exception might have happened after ->error_handler |
ad9e2762 TH |
779 | * recovered the port but before this point. Repeat |
780 | * EH in such case. | |
781 | */ | |
e30349d2 | 782 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 783 | |
b51e9e5d | 784 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 785 | if (--ap->eh_tries) { |
e30349d2 | 786 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
787 | goto repeat; |
788 | } | |
a9a79dfe JP |
789 | ata_port_err(ap, |
790 | "EH pending after %d tries, giving up\n", | |
791 | ATA_EH_MAX_TRIES); | |
914616a3 | 792 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
793 | } |
794 | ||
f3e81b19 | 795 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 796 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 797 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 798 | |
e4a9c373 DW |
799 | /* end eh (clear host_eh_scheduled) while holding |
800 | * ap->lock such that if exception occurs after this | |
801 | * point but before EH completion, SCSI midlayer will | |
ad9e2762 TH |
802 | * re-initiate EH. |
803 | */ | |
e4a9c373 | 804 | ap->ops->end_eh(ap); |
ad9e2762 | 805 | |
e30349d2 | 806 | spin_unlock_irqrestore(ap->lock, flags); |
c0c362b6 | 807 | ata_eh_release(ap); |
ad9e2762 | 808 | } else { |
9af5c9c9 | 809 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
810 | ap->ops->eng_timeout(ap); |
811 | } | |
ece1d636 | 812 | |
ece1d636 TH |
813 | scsi_eh_flush_done_q(&ap->eh_done_q); |
814 | ||
ad9e2762 | 815 | /* clean up */ |
e30349d2 | 816 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 817 | |
1cdaf534 | 818 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 819 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 820 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
ad72cf98 | 821 | schedule_delayed_work(&ap->hotplug_task, 0); |
1cdaf534 TH |
822 | |
823 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
a9a79dfe | 824 | ata_port_info(ap, "EH complete\n"); |
580b2102 | 825 | |
b51e9e5d | 826 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 827 | |
c6cf9e99 | 828 | /* tell wait_eh that we're done */ |
b51e9e5d | 829 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
830 | wake_up_all(&ap->eh_wait_q); |
831 | ||
e30349d2 | 832 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 833 | } |
0e0b494c | 834 | EXPORT_SYMBOL_GPL(ata_scsi_port_error_handler); |
ece1d636 | 835 | |
c6cf9e99 TH |
836 | /** |
837 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
838 | * @ap: Port to wait EH for | |
839 | * | |
840 | * Wait until the currently pending EH is complete. | |
841 | * | |
842 | * LOCKING: | |
843 | * Kernel thread context (may sleep). | |
844 | */ | |
845 | void ata_port_wait_eh(struct ata_port *ap) | |
846 | { | |
847 | unsigned long flags; | |
848 | DEFINE_WAIT(wait); | |
849 | ||
850 | retry: | |
ba6a1308 | 851 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 852 | |
b51e9e5d | 853 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 854 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 855 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 856 | schedule(); |
ba6a1308 | 857 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 858 | } |
0a1b622e | 859 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 860 | |
ba6a1308 | 861 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
862 | |
863 | /* make sure SCSI EH is complete */ | |
cca3974e | 864 | if (scsi_host_in_recovery(ap->scsi_host)) { |
97750ceb | 865 | ata_msleep(ap, 10); |
c6cf9e99 TH |
866 | goto retry; |
867 | } | |
868 | } | |
81c757bc | 869 | EXPORT_SYMBOL_GPL(ata_port_wait_eh); |
c6cf9e99 | 870 | |
5ddf24c5 TH |
871 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
872 | { | |
873 | unsigned int tag; | |
874 | int nr = 0; | |
875 | ||
876 | /* count only non-internal commands */ | |
877 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
878 | if (ata_qc_from_tag(ap, tag)) | |
879 | nr++; | |
880 | ||
881 | return nr; | |
882 | } | |
883 | ||
884 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
885 | { | |
886 | struct ata_port *ap = (void *)arg; | |
887 | unsigned long flags; | |
888 | int cnt; | |
889 | ||
890 | spin_lock_irqsave(ap->lock, flags); | |
891 | ||
892 | cnt = ata_eh_nr_in_flight(ap); | |
893 | ||
894 | /* are we done? */ | |
895 | if (!cnt) | |
896 | goto out_unlock; | |
897 | ||
898 | if (cnt == ap->fastdrain_cnt) { | |
899 | unsigned int tag; | |
900 | ||
901 | /* No progress during the last interval, tag all | |
902 | * in-flight qcs as timed out and freeze the port. | |
903 | */ | |
904 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
905 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
906 | if (qc) | |
907 | qc->err_mask |= AC_ERR_TIMEOUT; | |
908 | } | |
909 | ||
910 | ata_port_freeze(ap); | |
911 | } else { | |
912 | /* some qcs have finished, give it another chance */ | |
913 | ap->fastdrain_cnt = cnt; | |
914 | ap->fastdrain_timer.expires = | |
341c2c95 | 915 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
916 | add_timer(&ap->fastdrain_timer); |
917 | } | |
918 | ||
919 | out_unlock: | |
920 | spin_unlock_irqrestore(ap->lock, flags); | |
921 | } | |
922 | ||
923 | /** | |
924 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
925 | * @ap: target ATA port | |
926 | * @fastdrain: activate fast drain | |
927 | * | |
928 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
929 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
930 | * that EH kicks in in timely manner. | |
931 | * | |
932 | * LOCKING: | |
933 | * spin_lock_irqsave(host lock) | |
934 | */ | |
935 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
936 | { | |
937 | int cnt; | |
938 | ||
939 | /* already scheduled? */ | |
940 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
941 | return; | |
942 | ||
943 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
944 | ||
945 | if (!fastdrain) | |
946 | return; | |
947 | ||
948 | /* do we have in-flight qcs? */ | |
949 | cnt = ata_eh_nr_in_flight(ap); | |
950 | if (!cnt) | |
951 | return; | |
952 | ||
953 | /* activate fast drain */ | |
954 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
955 | ap->fastdrain_timer.expires = |
956 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
957 | add_timer(&ap->fastdrain_timer); |
958 | } | |
959 | ||
f686bcb8 TH |
960 | /** |
961 | * ata_qc_schedule_eh - schedule qc for error handling | |
962 | * @qc: command to schedule error handling for | |
963 | * | |
964 | * Schedule error handling for @qc. EH will kick in as soon as | |
965 | * other commands are drained. | |
966 | * | |
967 | * LOCKING: | |
cca3974e | 968 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
969 | */ |
970 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
971 | { | |
972 | struct ata_port *ap = qc->ap; | |
fa41efda TH |
973 | struct request_queue *q = qc->scsicmd->device->request_queue; |
974 | unsigned long flags; | |
f686bcb8 TH |
975 | |
976 | WARN_ON(!ap->ops->error_handler); | |
977 | ||
978 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 979 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
980 | |
981 | /* The following will fail if timeout has already expired. | |
982 | * ata_scsi_error() takes care of such scmds on EH entry. | |
983 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
984 | * this function completes. | |
985 | */ | |
fa41efda | 986 | spin_lock_irqsave(q->queue_lock, flags); |
242f9dcb | 987 | blk_abort_request(qc->scsicmd->request); |
fa41efda | 988 | spin_unlock_irqrestore(q->queue_lock, flags); |
f686bcb8 TH |
989 | } |
990 | ||
7b70fc03 | 991 | /** |
e4a9c373 DW |
992 | * ata_std_sched_eh - non-libsas ata_ports issue eh with this common routine |
993 | * @ap: ATA port to schedule EH for | |
7b70fc03 | 994 | * |
e4a9c373 | 995 | * LOCKING: inherited from ata_port_schedule_eh |
cca3974e | 996 | * spin_lock_irqsave(host lock) |
7b70fc03 | 997 | */ |
e4a9c373 | 998 | void ata_std_sched_eh(struct ata_port *ap) |
7b70fc03 TH |
999 | { |
1000 | WARN_ON(!ap->ops->error_handler); | |
1001 | ||
f4d6d004 TH |
1002 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
1003 | return; | |
1004 | ||
5ddf24c5 | 1005 | ata_eh_set_pending(ap, 1); |
cca3974e | 1006 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
1007 | |
1008 | DPRINTK("port EH scheduled\n"); | |
1009 | } | |
e4a9c373 DW |
1010 | EXPORT_SYMBOL_GPL(ata_std_sched_eh); |
1011 | ||
1012 | /** | |
1013 | * ata_std_end_eh - non-libsas ata_ports complete eh with this common routine | |
1014 | * @ap: ATA port to end EH for | |
1015 | * | |
1016 | * In the libata object model there is a 1:1 mapping of ata_port to | |
1017 | * shost, so host fields can be directly manipulated under ap->lock, in | |
1018 | * the libsas case we need to hold a lock at the ha->level to coordinate | |
1019 | * these events. | |
1020 | * | |
1021 | * LOCKING: | |
1022 | * spin_lock_irqsave(host lock) | |
1023 | */ | |
1024 | void ata_std_end_eh(struct ata_port *ap) | |
1025 | { | |
1026 | struct Scsi_Host *host = ap->scsi_host; | |
1027 | ||
1028 | host->host_eh_scheduled = 0; | |
1029 | } | |
1030 | EXPORT_SYMBOL(ata_std_end_eh); | |
1031 | ||
1032 | ||
1033 | /** | |
1034 | * ata_port_schedule_eh - schedule error handling without a qc | |
1035 | * @ap: ATA port to schedule EH for | |
1036 | * | |
1037 | * Schedule error handling for @ap. EH will kick in as soon as | |
1038 | * all commands are drained. | |
1039 | * | |
1040 | * LOCKING: | |
1041 | * spin_lock_irqsave(host lock) | |
1042 | */ | |
1043 | void ata_port_schedule_eh(struct ata_port *ap) | |
1044 | { | |
1045 | /* see: ata_std_sched_eh, unless you know better */ | |
1046 | ap->ops->sched_eh(ap); | |
1047 | } | |
7b70fc03 | 1048 | |
dbd82616 | 1049 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
1050 | { |
1051 | int tag, nr_aborted = 0; | |
1052 | ||
1053 | WARN_ON(!ap->ops->error_handler); | |
1054 | ||
5ddf24c5 TH |
1055 | /* we're gonna abort all commands, no need for fast drain */ |
1056 | ata_eh_set_pending(ap, 0); | |
1057 | ||
7b70fc03 TH |
1058 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
1059 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
1060 | ||
dbd82616 | 1061 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
1062 | qc->flags |= ATA_QCFLAG_FAILED; |
1063 | ata_qc_complete(qc); | |
1064 | nr_aborted++; | |
1065 | } | |
1066 | } | |
1067 | ||
1068 | if (!nr_aborted) | |
1069 | ata_port_schedule_eh(ap); | |
1070 | ||
1071 | return nr_aborted; | |
1072 | } | |
1073 | ||
dbd82616 TH |
1074 | /** |
1075 | * ata_link_abort - abort all qc's on the link | |
1076 | * @link: ATA link to abort qc's for | |
1077 | * | |
1078 | * Abort all active qc's active on @link and schedule EH. | |
1079 | * | |
1080 | * LOCKING: | |
1081 | * spin_lock_irqsave(host lock) | |
1082 | * | |
1083 | * RETURNS: | |
1084 | * Number of aborted qc's. | |
1085 | */ | |
1086 | int ata_link_abort(struct ata_link *link) | |
1087 | { | |
1088 | return ata_do_link_abort(link->ap, link); | |
1089 | } | |
1090 | ||
1091 | /** | |
1092 | * ata_port_abort - abort all qc's on the port | |
1093 | * @ap: ATA port to abort qc's for | |
1094 | * | |
1095 | * Abort all active qc's of @ap and schedule EH. | |
1096 | * | |
1097 | * LOCKING: | |
1098 | * spin_lock_irqsave(host_set lock) | |
1099 | * | |
1100 | * RETURNS: | |
1101 | * Number of aborted qc's. | |
1102 | */ | |
1103 | int ata_port_abort(struct ata_port *ap) | |
1104 | { | |
1105 | return ata_do_link_abort(ap, NULL); | |
1106 | } | |
1107 | ||
e3180499 TH |
1108 | /** |
1109 | * __ata_port_freeze - freeze port | |
1110 | * @ap: ATA port to freeze | |
1111 | * | |
1112 | * This function is called when HSM violation or some other | |
1113 | * condition disrupts normal operation of the port. Frozen port | |
1114 | * is not allowed to perform any operation until the port is | |
1115 | * thawed, which usually follows a successful reset. | |
1116 | * | |
1117 | * ap->ops->freeze() callback can be used for freezing the port | |
1118 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
1119 | * port cannot be frozen hardware-wise, the interrupt handler | |
1120 | * must ack and clear interrupts unconditionally while the port | |
1121 | * is frozen. | |
1122 | * | |
1123 | * LOCKING: | |
cca3974e | 1124 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1125 | */ |
1126 | static void __ata_port_freeze(struct ata_port *ap) | |
1127 | { | |
1128 | WARN_ON(!ap->ops->error_handler); | |
1129 | ||
1130 | if (ap->ops->freeze) | |
1131 | ap->ops->freeze(ap); | |
1132 | ||
b51e9e5d | 1133 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 1134 | |
44877b4e | 1135 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
1136 | } |
1137 | ||
1138 | /** | |
1139 | * ata_port_freeze - abort & freeze port | |
1140 | * @ap: ATA port to freeze | |
1141 | * | |
54c38444 JG |
1142 | * Abort and freeze @ap. The freeze operation must be called |
1143 | * first, because some hardware requires special operations | |
1144 | * before the taskfile registers are accessible. | |
e3180499 TH |
1145 | * |
1146 | * LOCKING: | |
cca3974e | 1147 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1148 | * |
1149 | * RETURNS: | |
1150 | * Number of aborted commands. | |
1151 | */ | |
1152 | int ata_port_freeze(struct ata_port *ap) | |
1153 | { | |
1154 | int nr_aborted; | |
1155 | ||
1156 | WARN_ON(!ap->ops->error_handler); | |
1157 | ||
e3180499 | 1158 | __ata_port_freeze(ap); |
54c38444 | 1159 | nr_aborted = ata_port_abort(ap); |
e3180499 TH |
1160 | |
1161 | return nr_aborted; | |
1162 | } | |
1163 | ||
7d77b247 TH |
1164 | /** |
1165 | * sata_async_notification - SATA async notification handler | |
1166 | * @ap: ATA port where async notification is received | |
1167 | * | |
1168 | * Handler to be called when async notification via SDB FIS is | |
1169 | * received. This function schedules EH if necessary. | |
1170 | * | |
1171 | * LOCKING: | |
1172 | * spin_lock_irqsave(host lock) | |
1173 | * | |
1174 | * RETURNS: | |
1175 | * 1 if EH is scheduled, 0 otherwise. | |
1176 | */ | |
1177 | int sata_async_notification(struct ata_port *ap) | |
1178 | { | |
1179 | u32 sntf; | |
1180 | int rc; | |
1181 | ||
1182 | if (!(ap->flags & ATA_FLAG_AN)) | |
1183 | return 0; | |
1184 | ||
1185 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
1186 | if (rc == 0) | |
1187 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1188 | ||
071f44b1 | 1189 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1190 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1191 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1192 | /* PMP is not attached. Check whether ATAPI |
1193 | * AN is configured. If so, notify media | |
1194 | * change. | |
1195 | */ | |
1196 | struct ata_device *dev = ap->link.device; | |
1197 | ||
1198 | if ((dev->class == ATA_DEV_ATAPI) && | |
1199 | (dev->flags & ATA_DFLAG_AN)) | |
1200 | ata_scsi_media_change_notify(dev); | |
1201 | return 0; | |
1202 | } else { | |
1203 | /* PMP is attached but SNTF is not available. | |
1204 | * ATAPI async media change notification is | |
1205 | * not used. The PMP must be reporting PHY | |
1206 | * status change, schedule EH. | |
1207 | */ | |
1208 | ata_port_schedule_eh(ap); | |
1209 | return 1; | |
1210 | } | |
1211 | } else { | |
1212 | /* PMP is attached and SNTF is available */ | |
1213 | struct ata_link *link; | |
1214 | ||
1215 | /* check and notify ATAPI AN */ | |
1eca4365 | 1216 | ata_for_each_link(link, ap, EDGE) { |
7d77b247 TH |
1217 | if (!(sntf & (1 << link->pmp))) |
1218 | continue; | |
1219 | ||
1220 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1221 | (link->device->flags & ATA_DFLAG_AN)) | |
1222 | ata_scsi_media_change_notify(link->device); | |
1223 | } | |
1224 | ||
1225 | /* If PMP is reporting that PHY status of some | |
1226 | * downstream ports has changed, schedule EH. | |
1227 | */ | |
1228 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1229 | ata_port_schedule_eh(ap); | |
1230 | return 1; | |
1231 | } | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | } | |
1236 | ||
e3180499 TH |
1237 | /** |
1238 | * ata_eh_freeze_port - EH helper to freeze port | |
1239 | * @ap: ATA port to freeze | |
1240 | * | |
1241 | * Freeze @ap. | |
1242 | * | |
1243 | * LOCKING: | |
1244 | * None. | |
1245 | */ | |
1246 | void ata_eh_freeze_port(struct ata_port *ap) | |
1247 | { | |
1248 | unsigned long flags; | |
1249 | ||
1250 | if (!ap->ops->error_handler) | |
1251 | return; | |
1252 | ||
ba6a1308 | 1253 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1254 | __ata_port_freeze(ap); |
ba6a1308 | 1255 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1256 | } |
1257 | ||
1258 | /** | |
1259 | * ata_port_thaw_port - EH helper to thaw port | |
1260 | * @ap: ATA port to thaw | |
1261 | * | |
1262 | * Thaw frozen port @ap. | |
1263 | * | |
1264 | * LOCKING: | |
1265 | * None. | |
1266 | */ | |
1267 | void ata_eh_thaw_port(struct ata_port *ap) | |
1268 | { | |
1269 | unsigned long flags; | |
1270 | ||
1271 | if (!ap->ops->error_handler) | |
1272 | return; | |
1273 | ||
ba6a1308 | 1274 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1275 | |
b51e9e5d | 1276 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1277 | |
1278 | if (ap->ops->thaw) | |
1279 | ap->ops->thaw(ap); | |
1280 | ||
ba6a1308 | 1281 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1282 | |
44877b4e | 1283 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1284 | } |
1285 | ||
ece1d636 TH |
1286 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1287 | { | |
1288 | /* nada */ | |
1289 | } | |
1290 | ||
1291 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1292 | { | |
1293 | struct ata_port *ap = qc->ap; | |
1294 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1295 | unsigned long flags; | |
1296 | ||
ba6a1308 | 1297 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1298 | qc->scsidone = ata_eh_scsidone; |
1299 | __ata_qc_complete(qc); | |
1300 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1301 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1302 | |
1303 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1304 | } | |
1305 | ||
1306 | /** | |
1307 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1308 | * @qc: Command to complete | |
1309 | * | |
1310 | * Indicate to the mid and upper layers that an ATA command has | |
1311 | * completed. To be used from EH. | |
1312 | */ | |
1313 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1314 | { | |
1315 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1316 | scmd->retries = scmd->allowed; | |
1317 | __ata_eh_qc_complete(qc); | |
1318 | } | |
1319 | ||
1320 | /** | |
1321 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1322 | * @qc: Command to retry | |
1323 | * | |
1324 | * Indicate to the mid and upper layers that an ATA command | |
1325 | * should be retried. To be used from EH. | |
1326 | * | |
1327 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
f13e2201 | 1328 | * scmd->allowed is incremented for commands which get retried |
ece1d636 TH |
1329 | * due to unrelated failures (qc->err_mask is zero). |
1330 | */ | |
1331 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1332 | { | |
1333 | struct scsi_cmnd *scmd = qc->scsicmd; | |
f13e2201 GG |
1334 | if (!qc->err_mask) |
1335 | scmd->allowed++; | |
ece1d636 TH |
1336 | __ata_eh_qc_complete(qc); |
1337 | } | |
022bdb07 | 1338 | |
678afac6 TH |
1339 | /** |
1340 | * ata_dev_disable - disable ATA device | |
1341 | * @dev: ATA device to disable | |
1342 | * | |
1343 | * Disable @dev. | |
1344 | * | |
1345 | * Locking: | |
1346 | * EH context. | |
1347 | */ | |
1348 | void ata_dev_disable(struct ata_device *dev) | |
1349 | { | |
1350 | if (!ata_dev_enabled(dev)) | |
1351 | return; | |
1352 | ||
1353 | if (ata_msg_drv(dev->link->ap)) | |
a9a79dfe | 1354 | ata_dev_warn(dev, "disabled\n"); |
678afac6 TH |
1355 | ata_acpi_on_disable(dev); |
1356 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1357 | dev->class++; | |
99cf610a TH |
1358 | |
1359 | /* From now till the next successful probe, ering is used to | |
1360 | * track probe failures. Clear accumulated device error info. | |
1361 | */ | |
1362 | ata_ering_clear(&dev->ering); | |
678afac6 TH |
1363 | } |
1364 | ||
0ea035a3 TH |
1365 | /** |
1366 | * ata_eh_detach_dev - detach ATA device | |
1367 | * @dev: ATA device to detach | |
1368 | * | |
1369 | * Detach @dev. | |
1370 | * | |
1371 | * LOCKING: | |
1372 | * None. | |
1373 | */ | |
fb7fd614 | 1374 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1375 | { |
f58229f8 TH |
1376 | struct ata_link *link = dev->link; |
1377 | struct ata_port *ap = link->ap; | |
90484ebf | 1378 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1379 | unsigned long flags; |
1380 | ||
1381 | ata_dev_disable(dev); | |
1382 | ||
ba6a1308 | 1383 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1384 | |
1385 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1386 | ||
1387 | if (ata_scsi_offline_dev(dev)) { | |
1388 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1389 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1390 | } |
1391 | ||
90484ebf | 1392 | /* clear per-dev EH info */ |
f58229f8 TH |
1393 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1394 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1395 | ehc->saved_xfer_mode[dev->devno] = 0; |
1396 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1397 | |
ba6a1308 | 1398 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1399 | } |
1400 | ||
022bdb07 TH |
1401 | /** |
1402 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1403 | * @link: target ATA link |
47005f25 | 1404 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1405 | * @action: action about to be performed |
1406 | * | |
1407 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1408 | * in @link->eh_info such that eh actions are not unnecessarily |
1409 | * repeated. | |
022bdb07 TH |
1410 | * |
1411 | * LOCKING: | |
1412 | * None. | |
1413 | */ | |
fb7fd614 TH |
1414 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1415 | unsigned int action) | |
022bdb07 | 1416 | { |
955e57df TH |
1417 | struct ata_port *ap = link->ap; |
1418 | struct ata_eh_info *ehi = &link->eh_info; | |
1419 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1420 | unsigned long flags; |
1421 | ||
ba6a1308 | 1422 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1423 | |
955e57df | 1424 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1425 | |
a568d1d2 TH |
1426 | /* About to take EH action, set RECOVERED. Ignore actions on |
1427 | * slave links as master will do them again. | |
1428 | */ | |
1429 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1430 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1431 | ||
ba6a1308 | 1432 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1433 | } |
1434 | ||
47005f25 TH |
1435 | /** |
1436 | * ata_eh_done - EH action complete | |
955e57df | 1437 | * @ap: target ATA port |
47005f25 TH |
1438 | * @dev: target ATA dev for per-dev action (can be NULL) |
1439 | * @action: action just completed | |
1440 | * | |
1441 | * Called right after performing EH actions to clear related bits | |
955e57df | 1442 | * in @link->eh_context. |
47005f25 TH |
1443 | * |
1444 | * LOCKING: | |
1445 | * None. | |
1446 | */ | |
fb7fd614 TH |
1447 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1448 | unsigned int action) | |
47005f25 | 1449 | { |
955e57df | 1450 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1451 | |
955e57df | 1452 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1453 | } |
1454 | ||
022bdb07 TH |
1455 | /** |
1456 | * ata_err_string - convert err_mask to descriptive string | |
1457 | * @err_mask: error mask to convert to string | |
1458 | * | |
1459 | * Convert @err_mask to descriptive string. Errors are | |
1460 | * prioritized according to severity and only the most severe | |
1461 | * error is reported. | |
1462 | * | |
1463 | * LOCKING: | |
1464 | * None. | |
1465 | * | |
1466 | * RETURNS: | |
1467 | * Descriptive string for @err_mask | |
1468 | */ | |
2dcb407e | 1469 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1470 | { |
1471 | if (err_mask & AC_ERR_HOST_BUS) | |
1472 | return "host bus error"; | |
1473 | if (err_mask & AC_ERR_ATA_BUS) | |
1474 | return "ATA bus error"; | |
1475 | if (err_mask & AC_ERR_TIMEOUT) | |
1476 | return "timeout"; | |
1477 | if (err_mask & AC_ERR_HSM) | |
1478 | return "HSM violation"; | |
1479 | if (err_mask & AC_ERR_SYSTEM) | |
1480 | return "internal error"; | |
1481 | if (err_mask & AC_ERR_MEDIA) | |
1482 | return "media error"; | |
1483 | if (err_mask & AC_ERR_INVALID) | |
1484 | return "invalid argument"; | |
1485 | if (err_mask & AC_ERR_DEV) | |
1486 | return "device error"; | |
1487 | return "unknown error"; | |
1488 | } | |
1489 | ||
e8ee8451 TH |
1490 | /** |
1491 | * ata_read_log_page - read a specific log page | |
1492 | * @dev: target device | |
65fe1f0f | 1493 | * @log: log to read |
e8ee8451 TH |
1494 | * @page: page to read |
1495 | * @buf: buffer to store read page | |
1496 | * @sectors: number of sectors to read | |
1497 | * | |
1498 | * Read log page using READ_LOG_EXT command. | |
1499 | * | |
1500 | * LOCKING: | |
1501 | * Kernel thread context (may sleep). | |
1502 | * | |
1503 | * RETURNS: | |
1504 | * 0 on success, AC_ERR_* mask otherwise. | |
1505 | */ | |
65fe1f0f SH |
1506 | unsigned int ata_read_log_page(struct ata_device *dev, u8 log, |
1507 | u8 page, void *buf, unsigned int sectors) | |
e8ee8451 | 1508 | { |
ea013a9b | 1509 | unsigned long ap_flags = dev->link->ap->flags; |
e8ee8451 TH |
1510 | struct ata_taskfile tf; |
1511 | unsigned int err_mask; | |
5d3abf8f | 1512 | bool dma = false; |
e8ee8451 | 1513 | |
65fe1f0f | 1514 | DPRINTK("read log page - log 0x%x, page 0x%x\n", log, page); |
e8ee8451 | 1515 | |
ea013a9b AW |
1516 | /* |
1517 | * Return error without actually issuing the command on controllers | |
1518 | * which e.g. lockup on a read log page. | |
1519 | */ | |
1520 | if (ap_flags & ATA_FLAG_NO_LOG_PAGE) | |
1521 | return AC_ERR_DEV; | |
1522 | ||
5d3abf8f | 1523 | retry: |
e8ee8451 | 1524 | ata_tf_init(dev, &tf); |
5d3abf8f MP |
1525 | if (dev->dma_mode && ata_id_has_read_log_dma_ext(dev->id) && |
1526 | !(dev->horkage & ATA_HORKAGE_NO_NCQ_LOG)) { | |
9faa6438 HR |
1527 | tf.command = ATA_CMD_READ_LOG_DMA_EXT; |
1528 | tf.protocol = ATA_PROT_DMA; | |
5d3abf8f | 1529 | dma = true; |
9faa6438 HR |
1530 | } else { |
1531 | tf.command = ATA_CMD_READ_LOG_EXT; | |
1532 | tf.protocol = ATA_PROT_PIO; | |
eab6ee1c | 1533 | dma = false; |
9faa6438 | 1534 | } |
65fe1f0f SH |
1535 | tf.lbal = log; |
1536 | tf.lbam = page; | |
e8ee8451 TH |
1537 | tf.nsect = sectors; |
1538 | tf.hob_nsect = sectors >> 8; | |
1539 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
e8ee8451 TH |
1540 | |
1541 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1542 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 | 1543 | |
5d3abf8f MP |
1544 | if (err_mask && dma) { |
1545 | dev->horkage |= ATA_HORKAGE_NO_NCQ_LOG; | |
1546 | ata_dev_warn(dev, "READ LOG DMA EXT failed, trying unqueued\n"); | |
1547 | goto retry; | |
1548 | } | |
1549 | ||
e8ee8451 TH |
1550 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
1551 | return err_mask; | |
1552 | } | |
1553 | ||
1554 | /** | |
1555 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1556 | * @dev: Device to read log page 10h from | |
1557 | * @tag: Resulting tag of the failed command | |
1558 | * @tf: Resulting taskfile registers of the failed command | |
1559 | * | |
1560 | * Read log page 10h to obtain NCQ error details and clear error | |
1561 | * condition. | |
1562 | * | |
1563 | * LOCKING: | |
1564 | * Kernel thread context (may sleep). | |
1565 | * | |
1566 | * RETURNS: | |
1567 | * 0 on success, -errno otherwise. | |
1568 | */ | |
1569 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1570 | int *tag, struct ata_taskfile *tf) | |
1571 | { | |
9af5c9c9 | 1572 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1573 | unsigned int err_mask; |
1574 | u8 csum; | |
1575 | int i; | |
1576 | ||
65fe1f0f | 1577 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, 0, buf, 1); |
e8ee8451 TH |
1578 | if (err_mask) |
1579 | return -EIO; | |
1580 | ||
1581 | csum = 0; | |
1582 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1583 | csum += buf[i]; | |
1584 | if (csum) | |
a9a79dfe JP |
1585 | ata_dev_warn(dev, "invalid checksum 0x%x on log page 10h\n", |
1586 | csum); | |
e8ee8451 TH |
1587 | |
1588 | if (buf[0] & 0x80) | |
1589 | return -ENOENT; | |
1590 | ||
1591 | *tag = buf[0] & 0x1f; | |
1592 | ||
1593 | tf->command = buf[2]; | |
1594 | tf->feature = buf[3]; | |
1595 | tf->lbal = buf[4]; | |
1596 | tf->lbam = buf[5]; | |
1597 | tf->lbah = buf[6]; | |
1598 | tf->device = buf[7]; | |
1599 | tf->hob_lbal = buf[8]; | |
1600 | tf->hob_lbam = buf[9]; | |
1601 | tf->hob_lbah = buf[10]; | |
1602 | tf->nsect = buf[12]; | |
1603 | tf->hob_nsect = buf[13]; | |
5b01e4b9 HR |
1604 | if (ata_id_has_ncq_autosense(dev->id)) |
1605 | tf->auxiliary = buf[14] << 16 | buf[15] << 8 | buf[16]; | |
e8ee8451 TH |
1606 | |
1607 | return 0; | |
1608 | } | |
1609 | ||
11fc33da TH |
1610 | /** |
1611 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1612 | * @dev: target ATAPI device | |
1613 | * @r_sense_key: out parameter for sense_key | |
1614 | * | |
1615 | * Perform ATAPI TEST_UNIT_READY. | |
1616 | * | |
1617 | * LOCKING: | |
1618 | * EH context (may sleep). | |
1619 | * | |
1620 | * RETURNS: | |
1621 | * 0 on success, AC_ERR_* mask on failure. | |
1622 | */ | |
3dc67440 | 1623 | unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) |
11fc33da TH |
1624 | { |
1625 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1626 | struct ata_taskfile tf; | |
1627 | unsigned int err_mask; | |
1628 | ||
1629 | ata_tf_init(dev, &tf); | |
1630 | ||
1631 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1632 | tf.command = ATA_CMD_PACKET; | |
1633 | tf.protocol = ATAPI_PROT_NODATA; | |
1634 | ||
1635 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1636 | if (err_mask == AC_ERR_DEV) | |
1637 | *r_sense_key = tf.feature >> 4; | |
1638 | return err_mask; | |
1639 | } | |
1640 | ||
e87fd28c HR |
1641 | /** |
1642 | * ata_eh_request_sense - perform REQUEST_SENSE_DATA_EXT | |
1643 | * @dev: device to perform REQUEST_SENSE_SENSE_DATA_EXT to | |
1644 | * @cmd: scsi command for which the sense code should be set | |
1645 | * | |
1646 | * Perform REQUEST_SENSE_DATA_EXT after the device reported CHECK | |
1647 | * SENSE. This function is an EH helper. | |
1648 | * | |
1649 | * LOCKING: | |
1650 | * Kernel thread context (may sleep). | |
1651 | */ | |
1652 | static void ata_eh_request_sense(struct ata_queued_cmd *qc, | |
1653 | struct scsi_cmnd *cmd) | |
1654 | { | |
1655 | struct ata_device *dev = qc->dev; | |
1656 | struct ata_taskfile tf; | |
1657 | unsigned int err_mask; | |
1658 | ||
1659 | if (qc->ap->pflags & ATA_PFLAG_FROZEN) { | |
1660 | ata_dev_warn(dev, "sense data available but port frozen\n"); | |
1661 | return; | |
1662 | } | |
1663 | ||
d238ffd5 | 1664 | if (!cmd || qc->flags & ATA_QCFLAG_SENSE_VALID) |
e87fd28c HR |
1665 | return; |
1666 | ||
1667 | if (!ata_id_sense_reporting_enabled(dev->id)) { | |
1668 | ata_dev_warn(qc->dev, "sense data reporting disabled\n"); | |
1669 | return; | |
1670 | } | |
1671 | ||
1672 | DPRINTK("ATA request sense\n"); | |
1673 | ||
1674 | ata_tf_init(dev, &tf); | |
1675 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1676 | tf.flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
1677 | tf.command = ATA_CMD_REQ_SENSE_DATA; | |
1678 | tf.protocol = ATA_PROT_NODATA; | |
1679 | ||
1680 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
1681 | /* Ignore err_mask; ATA_ERR might be set */ | |
1682 | if (tf.command & ATA_SENSE) { | |
06dbde5f | 1683 | ata_scsi_set_sense(dev, cmd, tf.lbah, tf.lbam, tf.lbal); |
e87fd28c HR |
1684 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
1685 | } else { | |
1686 | ata_dev_warn(dev, "request sense failed stat %02x emask %x\n", | |
1687 | tf.command, err_mask); | |
1688 | } | |
1689 | } | |
1690 | ||
022bdb07 TH |
1691 | /** |
1692 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1693 | * @dev: device to perform REQUEST_SENSE to | |
1694 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1695 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1696 | * |
1697 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1698 | * SENSE. This function is EH helper. | |
1699 | * | |
1700 | * LOCKING: | |
1701 | * Kernel thread context (may sleep). | |
1702 | * | |
1703 | * RETURNS: | |
1704 | * 0 on success, AC_ERR_* mask on failure | |
1705 | */ | |
3dc67440 | 1706 | unsigned int atapi_eh_request_sense(struct ata_device *dev, |
3eabddb8 | 1707 | u8 *sense_buf, u8 dfl_sense_key) |
022bdb07 | 1708 | { |
3eabddb8 TH |
1709 | u8 cdb[ATAPI_CDB_LEN] = |
1710 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1711 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1712 | struct ata_taskfile tf; |
022bdb07 TH |
1713 | |
1714 | DPRINTK("ATAPI request sense\n"); | |
1715 | ||
022bdb07 TH |
1716 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
1717 | ||
56287768 AL |
1718 | /* initialize sense_buf with the error register, |
1719 | * for the case where they are -not- overwritten | |
1720 | */ | |
022bdb07 | 1721 | sense_buf[0] = 0x70; |
3eabddb8 | 1722 | sense_buf[2] = dfl_sense_key; |
56287768 | 1723 | |
a617c09f | 1724 | /* some devices time out if garbage left in tf */ |
56287768 | 1725 | ata_tf_init(dev, &tf); |
022bdb07 | 1726 | |
022bdb07 TH |
1727 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1728 | tf.command = ATA_CMD_PACKET; | |
1729 | ||
1730 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1731 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1732 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1733 | tf.feature |= ATAPI_PKT_DMA; |
1734 | } else { | |
0dc36888 | 1735 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1736 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1737 | tf.lbah = 0; | |
022bdb07 TH |
1738 | } |
1739 | ||
1740 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1741 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1742 | } |
1743 | ||
1744 | /** | |
1745 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1746 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1747 | * |
1748 | * Analyze SError if available and further determine cause of | |
1749 | * failure. | |
1750 | * | |
1751 | * LOCKING: | |
1752 | * None. | |
1753 | */ | |
0260731f | 1754 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1755 | { |
0260731f | 1756 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1757 | u32 serror = ehc->i.serror; |
1758 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1759 | u32 hotplug_mask; |
022bdb07 | 1760 | |
e0614db2 | 1761 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1762 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1763 | action |= ATA_EH_RESET; |
022bdb07 TH |
1764 | } |
1765 | if (serror & SERR_PROTOCOL) { | |
1766 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1767 | action |= ATA_EH_RESET; |
022bdb07 TH |
1768 | } |
1769 | if (serror & SERR_INTERNAL) { | |
1770 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1771 | action |= ATA_EH_RESET; |
022bdb07 | 1772 | } |
f9df58cb TH |
1773 | |
1774 | /* Determine whether a hotplug event has occurred. Both | |
1775 | * SError.N/X are considered hotplug events for enabled or | |
1776 | * host links. For disabled PMP links, only N bit is | |
1777 | * considered as X bit is left at 1 for link plugging. | |
1778 | */ | |
eb0e85e3 | 1779 | if (link->lpm_policy > ATA_LPM_MAX_POWER) |
6b7ae954 TH |
1780 | hotplug_mask = 0; /* hotplug doesn't work w/ LPM */ |
1781 | else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
f9df58cb TH |
1782 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
1783 | else | |
1784 | hotplug_mask = SERR_PHYRDY_CHG; | |
1785 | ||
1786 | if (serror & hotplug_mask) | |
084fe639 | 1787 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1788 | |
1789 | ehc->i.err_mask |= err_mask; | |
1790 | ehc->i.action |= action; | |
1791 | } | |
1792 | ||
e8ee8451 TH |
1793 | /** |
1794 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1795 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1796 | * |
1797 | * Read log page 10h, determine the offending qc and acquire | |
1798 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1799 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1800 | * care of the rest. | |
1801 | * | |
1802 | * LOCKING: | |
1803 | * Kernel thread context (may sleep). | |
1804 | */ | |
10acf3b0 | 1805 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1806 | { |
0260731f TH |
1807 | struct ata_port *ap = link->ap; |
1808 | struct ata_eh_context *ehc = &link->eh_context; | |
1809 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1810 | struct ata_queued_cmd *qc; |
1811 | struct ata_taskfile tf; | |
1812 | int tag, rc; | |
1813 | ||
1814 | /* if frozen, we can't do much */ | |
b51e9e5d | 1815 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1816 | return; |
1817 | ||
1818 | /* is it NCQ device error? */ | |
0260731f | 1819 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1820 | return; |
1821 | ||
1822 | /* has LLDD analyzed already? */ | |
1823 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1824 | qc = __ata_qc_from_tag(ap, tag); | |
1825 | ||
1826 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1827 | continue; | |
1828 | ||
1829 | if (qc->err_mask) | |
1830 | return; | |
1831 | } | |
1832 | ||
1833 | /* okay, this error is ours */ | |
a09bf4cd | 1834 | memset(&tf, 0, sizeof(tf)); |
e8ee8451 TH |
1835 | rc = ata_eh_read_log_10h(dev, &tag, &tf); |
1836 | if (rc) { | |
a9a79dfe JP |
1837 | ata_link_err(link, "failed to read log page 10h (errno=%d)\n", |
1838 | rc); | |
e8ee8451 TH |
1839 | return; |
1840 | } | |
1841 | ||
0260731f | 1842 | if (!(link->sactive & (1 << tag))) { |
a9a79dfe JP |
1843 | ata_link_err(link, "log page 10h reported inactive tag %d\n", |
1844 | tag); | |
e8ee8451 TH |
1845 | return; |
1846 | } | |
1847 | ||
1848 | /* we've got the perpetrator, condemn it */ | |
1849 | qc = __ata_qc_from_tag(ap, tag); | |
1850 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1851 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1852 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
d238ffd5 | 1853 | if ((qc->result_tf.command & ATA_SENSE) || qc->result_tf.auxiliary) { |
5b01e4b9 HR |
1854 | char sense_key, asc, ascq; |
1855 | ||
1856 | sense_key = (qc->result_tf.auxiliary >> 16) & 0xff; | |
1857 | asc = (qc->result_tf.auxiliary >> 8) & 0xff; | |
1858 | ascq = qc->result_tf.auxiliary & 0xff; | |
06dbde5f | 1859 | ata_scsi_set_sense(dev, qc->scsicmd, sense_key, asc, ascq); |
492bf621 HR |
1860 | ata_scsi_set_sense_information(dev, qc->scsicmd, |
1861 | &qc->result_tf); | |
5b01e4b9 HR |
1862 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
1863 | } | |
1864 | ||
e8ee8451 TH |
1865 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1866 | } | |
1867 | ||
022bdb07 TH |
1868 | /** |
1869 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1870 | * @qc: qc to analyze | |
1871 | * @tf: Taskfile registers to analyze | |
1872 | * | |
1873 | * Analyze taskfile of @qc and further determine cause of | |
1874 | * failure. This function also requests ATAPI sense data if | |
25985edc | 1875 | * available. |
022bdb07 TH |
1876 | * |
1877 | * LOCKING: | |
1878 | * Kernel thread context (may sleep). | |
1879 | * | |
1880 | * RETURNS: | |
1881 | * Determined recovery action | |
1882 | */ | |
1883 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1884 | const struct ata_taskfile *tf) | |
1885 | { | |
1886 | unsigned int tmp, action = 0; | |
1887 | u8 stat = tf->command, err = tf->feature; | |
1888 | ||
1889 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1890 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1891 | return ATA_EH_RESET; |
022bdb07 TH |
1892 | } |
1893 | ||
e87fd28c | 1894 | if (stat & (ATA_ERR | ATA_DF)) { |
a51d644a | 1895 | qc->err_mask |= AC_ERR_DEV; |
e87fd28c HR |
1896 | /* |
1897 | * Sense data reporting does not work if the | |
1898 | * device fault bit is set. | |
1899 | */ | |
1900 | if (stat & ATA_DF) | |
1901 | stat &= ~ATA_SENSE; | |
1902 | } else { | |
022bdb07 | 1903 | return 0; |
e87fd28c | 1904 | } |
022bdb07 TH |
1905 | |
1906 | switch (qc->dev->class) { | |
1907 | case ATA_DEV_ATA: | |
9162c657 | 1908 | case ATA_DEV_ZAC: |
e87fd28c HR |
1909 | if (stat & ATA_SENSE) |
1910 | ata_eh_request_sense(qc, qc->scsicmd); | |
022bdb07 TH |
1911 | if (err & ATA_ICRC) |
1912 | qc->err_mask |= AC_ERR_ATA_BUS; | |
eec7e1c1 | 1913 | if (err & (ATA_UNC | ATA_AMNF)) |
022bdb07 TH |
1914 | qc->err_mask |= AC_ERR_MEDIA; |
1915 | if (err & ATA_IDNF) | |
1916 | qc->err_mask |= AC_ERR_INVALID; | |
1917 | break; | |
1918 | ||
1919 | case ATA_DEV_ATAPI: | |
a569a30d | 1920 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1921 | tmp = atapi_eh_request_sense(qc->dev, |
1922 | qc->scsicmd->sense_buffer, | |
1923 | qc->result_tf.feature >> 4); | |
3852e373 | 1924 | if (!tmp) |
a569a30d | 1925 | qc->flags |= ATA_QCFLAG_SENSE_VALID; |
3852e373 | 1926 | else |
a569a30d TH |
1927 | qc->err_mask |= tmp; |
1928 | } | |
022bdb07 TH |
1929 | } |
1930 | ||
3852e373 HR |
1931 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { |
1932 | int ret = scsi_check_sense(qc->scsicmd); | |
1933 | /* | |
1934 | * SUCCESS here means that the sense code could | |
1935 | * evaluated and should be passed to the upper layers | |
1936 | * for correct evaluation. | |
1937 | * FAILED means the sense code could not interpreted | |
1938 | * and the device would need to be reset. | |
1939 | * NEEDS_RETRY and ADD_TO_MLQUEUE means that the | |
1940 | * command would need to be retried. | |
1941 | */ | |
1942 | if (ret == NEEDS_RETRY || ret == ADD_TO_MLQUEUE) { | |
1943 | qc->flags |= ATA_QCFLAG_RETRY; | |
1944 | qc->err_mask |= AC_ERR_OTHER; | |
1945 | } else if (ret != SUCCESS) { | |
1946 | qc->err_mask |= AC_ERR_HSM; | |
1947 | } | |
1948 | } | |
022bdb07 | 1949 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) |
cf480626 | 1950 | action |= ATA_EH_RESET; |
022bdb07 TH |
1951 | |
1952 | return action; | |
1953 | } | |
1954 | ||
76326ac1 TH |
1955 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1956 | int *xfer_ok) | |
022bdb07 | 1957 | { |
76326ac1 TH |
1958 | int base = 0; |
1959 | ||
1960 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1961 | *xfer_ok = 1; | |
1962 | ||
1963 | if (!*xfer_ok) | |
75f9cafc | 1964 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1965 | |
7d47e8d4 | 1966 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1967 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1968 | |
7d47e8d4 | 1969 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1970 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1971 | |
3884f7b0 | 1972 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1973 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1974 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1975 | if ((err_mask & |
1976 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1977 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1978 | } |
1979 | ||
1980 | return 0; | |
1981 | } | |
1982 | ||
7d47e8d4 | 1983 | struct speed_down_verdict_arg { |
022bdb07 | 1984 | u64 since; |
76326ac1 | 1985 | int xfer_ok; |
3884f7b0 | 1986 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1987 | }; |
1988 | ||
7d47e8d4 | 1989 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1990 | { |
7d47e8d4 | 1991 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1992 | int cat; |
022bdb07 | 1993 | |
d9027470 | 1994 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since)) |
022bdb07 TH |
1995 | return -1; |
1996 | ||
76326ac1 TH |
1997 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1998 | &arg->xfer_ok); | |
7d47e8d4 | 1999 | arg->nr_errors[cat]++; |
76326ac1 | 2000 | |
022bdb07 TH |
2001 | return 0; |
2002 | } | |
2003 | ||
2004 | /** | |
7d47e8d4 | 2005 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
2006 | * @dev: Device of interest |
2007 | * | |
2008 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
2009 | * whether NCQ needs to be turned off, transfer speed should be |
2010 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 2011 | * |
3884f7b0 TH |
2012 | * ECAT_ATA_BUS : ATA_BUS error for any command |
2013 | * | |
2014 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
2015 | * IO commands | |
2016 | * | |
2017 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
2018 | * | |
76326ac1 TH |
2019 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
2020 | * data transfer hasn't been verified. | |
2021 | * | |
3884f7b0 TH |
2022 | * Verdicts are |
2023 | * | |
2024 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 2025 | * |
3884f7b0 TH |
2026 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
2027 | * to PIO. | |
7d47e8d4 | 2028 | * |
3884f7b0 | 2029 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 2030 | * |
3884f7b0 | 2031 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
2032 | * taken per error. An action triggered by non-DUBIOUS errors |
2033 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
2034 | * This is to expedite speed down decisions right after device is | |
2035 | * initially configured. | |
2036 | * | |
4091fb95 | 2037 | * The following are speed down rules. #1 and #2 deal with |
76326ac1 | 2038 | * DUBIOUS errors. |
7d47e8d4 | 2039 | * |
76326ac1 TH |
2040 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
2041 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
2042 | * | |
2043 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
2044 | * occurred during last 5 mins, NCQ_OFF. | |
2045 | * | |
2046 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
25985edc | 2047 | * occurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 2048 | * |
76326ac1 | 2049 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
2050 | * during last 10 mins, NCQ_OFF. |
2051 | * | |
76326ac1 | 2052 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 2053 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 2054 | * |
022bdb07 TH |
2055 | * LOCKING: |
2056 | * Inherited from caller. | |
2057 | * | |
2058 | * RETURNS: | |
7d47e8d4 | 2059 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 2060 | */ |
7d47e8d4 | 2061 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 2062 | { |
7d47e8d4 TH |
2063 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
2064 | u64 j64 = get_jiffies_64(); | |
2065 | struct speed_down_verdict_arg arg; | |
2066 | unsigned int verdict = 0; | |
022bdb07 | 2067 | |
3884f7b0 | 2068 | /* scan past 5 mins of error history */ |
7d47e8d4 | 2069 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 2070 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 2071 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 2072 | |
76326ac1 TH |
2073 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
2074 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
2075 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
2076 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
2077 | ||
2078 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
2079 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
2080 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
2081 | ||
3884f7b0 TH |
2082 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
2083 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 2084 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 2085 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 2086 | |
3884f7b0 | 2087 | /* scan past 10 mins of error history */ |
022bdb07 | 2088 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 2089 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 2090 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 2091 | |
3884f7b0 TH |
2092 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
2093 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
2094 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
2095 | ||
2096 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
2097 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 2098 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 2099 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 2100 | |
7d47e8d4 | 2101 | return verdict; |
022bdb07 TH |
2102 | } |
2103 | ||
2104 | /** | |
2105 | * ata_eh_speed_down - record error and speed down if necessary | |
2106 | * @dev: Failed device | |
3884f7b0 | 2107 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
2108 | * @err_mask: err_mask of the error |
2109 | * | |
2110 | * Record error and examine error history to determine whether | |
2111 | * adjusting transmission speed is necessary. It also sets | |
2112 | * transmission limits appropriately if such adjustment is | |
2113 | * necessary. | |
2114 | * | |
2115 | * LOCKING: | |
2116 | * Kernel thread context (may sleep). | |
2117 | * | |
2118 | * RETURNS: | |
7d47e8d4 | 2119 | * Determined recovery action. |
022bdb07 | 2120 | */ |
3884f7b0 TH |
2121 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
2122 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 2123 | { |
b1c72916 | 2124 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 2125 | int xfer_ok = 0; |
7d47e8d4 TH |
2126 | unsigned int verdict; |
2127 | unsigned int action = 0; | |
2128 | ||
2129 | /* don't bother if Cat-0 error */ | |
76326ac1 | 2130 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
2131 | return 0; |
2132 | ||
2133 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 2134 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 2135 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 2136 | |
7d47e8d4 TH |
2137 | /* turn off NCQ? */ |
2138 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
2139 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
2140 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
2141 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
a9a79dfe | 2142 | ata_dev_warn(dev, "NCQ disabled due to excessive errors\n"); |
7d47e8d4 TH |
2143 | goto done; |
2144 | } | |
022bdb07 | 2145 | |
7d47e8d4 TH |
2146 | /* speed down? */ |
2147 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
2148 | /* speed down SATA link speed if possible */ | |
a07d499b | 2149 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 2150 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2151 | goto done; |
2152 | } | |
022bdb07 | 2153 | |
7d47e8d4 TH |
2154 | /* lower transfer mode */ |
2155 | if (dev->spdn_cnt < 2) { | |
2156 | static const int dma_dnxfer_sel[] = | |
2157 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
2158 | static const int pio_dnxfer_sel[] = | |
2159 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
2160 | int sel; | |
2161 | ||
2162 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
2163 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
2164 | else | |
2165 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
2166 | ||
2167 | dev->spdn_cnt++; | |
2168 | ||
2169 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 2170 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2171 | goto done; |
2172 | } | |
2173 | } | |
2174 | } | |
2175 | ||
2176 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 2177 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
2178 | */ |
2179 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 2180 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
2181 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
2182 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
2183 | dev->spdn_cnt = 0; | |
cf480626 | 2184 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
2185 | goto done; |
2186 | } | |
2187 | } | |
022bdb07 | 2188 | |
022bdb07 | 2189 | return 0; |
7d47e8d4 TH |
2190 | done: |
2191 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
2192 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
2193 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 2194 | return action; |
022bdb07 TH |
2195 | } |
2196 | ||
8d899e70 ML |
2197 | /** |
2198 | * ata_eh_worth_retry - analyze error and decide whether to retry | |
2199 | * @qc: qc to possibly retry | |
2200 | * | |
2201 | * Look at the cause of the error and decide if a retry | |
2202 | * might be useful or not. We don't want to retry media errors | |
2203 | * because the drive itself has probably already taken 10-30 seconds | |
2204 | * doing its own internal retries before reporting the failure. | |
2205 | */ | |
2206 | static inline int ata_eh_worth_retry(struct ata_queued_cmd *qc) | |
2207 | { | |
1eaca39a | 2208 | if (qc->err_mask & AC_ERR_MEDIA) |
8d899e70 ML |
2209 | return 0; /* don't retry media errors */ |
2210 | if (qc->flags & ATA_QCFLAG_IO) | |
2211 | return 1; /* otherwise retry anything from fs stack */ | |
2212 | if (qc->err_mask & AC_ERR_INVALID) | |
2213 | return 0; /* don't retry these */ | |
2214 | return qc->err_mask != AC_ERR_DEV; /* retry if not dev error */ | |
2215 | } | |
2216 | ||
022bdb07 | 2217 | /** |
9b1e2658 TH |
2218 | * ata_eh_link_autopsy - analyze error and determine recovery action |
2219 | * @link: host link to perform autopsy on | |
022bdb07 | 2220 | * |
0260731f TH |
2221 | * Analyze why @link failed and determine which recovery actions |
2222 | * are needed. This function also sets more detailed AC_ERR_* | |
2223 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
2224 | * |
2225 | * LOCKING: | |
2226 | * Kernel thread context (may sleep). | |
2227 | */ | |
9b1e2658 | 2228 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 2229 | { |
0260731f | 2230 | struct ata_port *ap = link->ap; |
936fd732 | 2231 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 2232 | struct ata_device *dev; |
3884f7b0 TH |
2233 | unsigned int all_err_mask = 0, eflags = 0; |
2234 | int tag; | |
022bdb07 TH |
2235 | u32 serror; |
2236 | int rc; | |
2237 | ||
2238 | DPRINTK("ENTER\n"); | |
2239 | ||
1cdaf534 TH |
2240 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
2241 | return; | |
2242 | ||
022bdb07 | 2243 | /* obtain and analyze SError */ |
936fd732 | 2244 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
2245 | if (rc == 0) { |
2246 | ehc->i.serror |= serror; | |
0260731f | 2247 | ata_eh_analyze_serror(link); |
4e57c517 | 2248 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 2249 | /* SError read failed, force reset and probing */ |
b558eddd | 2250 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 2251 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
2252 | ehc->i.err_mask |= AC_ERR_OTHER; |
2253 | } | |
022bdb07 | 2254 | |
e8ee8451 | 2255 | /* analyze NCQ failure */ |
0260731f | 2256 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 2257 | |
022bdb07 TH |
2258 | /* any real error trumps AC_ERR_OTHER */ |
2259 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
2260 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
2261 | ||
2262 | all_err_mask |= ehc->i.err_mask; | |
2263 | ||
2264 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2265 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2266 | ||
b1c72916 TH |
2267 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2268 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
2269 | continue; |
2270 | ||
2271 | /* inherit upper level err_mask */ | |
2272 | qc->err_mask |= ehc->i.err_mask; | |
2273 | ||
022bdb07 | 2274 | /* analyze TF */ |
4528e4da | 2275 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
2276 | |
2277 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
2278 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
2279 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
2280 | AC_ERR_INVALID); | |
2281 | ||
2282 | /* any real error trumps unknown error */ | |
2283 | if (qc->err_mask & ~AC_ERR_OTHER) | |
2284 | qc->err_mask &= ~AC_ERR_OTHER; | |
2285 | ||
2286 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 2287 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 2288 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 | 2289 | |
03faab78 | 2290 | /* determine whether the command is worth retrying */ |
8d899e70 | 2291 | if (ata_eh_worth_retry(qc)) |
03faab78 TH |
2292 | qc->flags |= ATA_QCFLAG_RETRY; |
2293 | ||
022bdb07 | 2294 | /* accumulate error info */ |
4528e4da | 2295 | ehc->i.dev = qc->dev; |
022bdb07 TH |
2296 | all_err_mask |= qc->err_mask; |
2297 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 2298 | eflags |= ATA_EFLAG_IS_IO; |
255c03d1 | 2299 | trace_ata_eh_link_autopsy_qc(qc); |
022bdb07 TH |
2300 | } |
2301 | ||
a20f33ff | 2302 | /* enforce default EH actions */ |
b51e9e5d | 2303 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 2304 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2305 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2306 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2307 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2308 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2309 | |
dfcc173d TH |
2310 | /* If we have offending qcs and the associated failed device, |
2311 | * perform per-dev EH action only on the offending device. | |
2312 | */ | |
4528e4da | 2313 | if (ehc->i.dev) { |
4528e4da TH |
2314 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2315 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2316 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2317 | } |
2318 | ||
2695e366 TH |
2319 | /* propagate timeout to host link */ |
2320 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2321 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2322 | ||
2323 | /* record error and consider speeding down */ | |
dfcc173d | 2324 | dev = ehc->i.dev; |
2695e366 TH |
2325 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2326 | ata_dev_enabled(link->device)))) | |
2327 | dev = link->device; | |
dfcc173d | 2328 | |
76326ac1 TH |
2329 | if (dev) { |
2330 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2331 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2332 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 2333 | } |
255c03d1 | 2334 | trace_ata_eh_link_autopsy(dev, ehc->i.action, all_err_mask); |
022bdb07 TH |
2335 | DPRINTK("EXIT\n"); |
2336 | } | |
2337 | ||
2338 | /** | |
9b1e2658 TH |
2339 | * ata_eh_autopsy - analyze error and determine recovery action |
2340 | * @ap: host port to perform autopsy on | |
2341 | * | |
2342 | * Analyze all links of @ap and determine why they failed and | |
2343 | * which recovery actions are needed. | |
2344 | * | |
2345 | * LOCKING: | |
2346 | * Kernel thread context (may sleep). | |
2347 | */ | |
fb7fd614 | 2348 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2349 | { |
2350 | struct ata_link *link; | |
2351 | ||
1eca4365 | 2352 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2353 | ata_eh_link_autopsy(link); |
2695e366 | 2354 | |
b1c72916 TH |
2355 | /* Handle the frigging slave link. Autopsy is done similarly |
2356 | * but actions and flags are transferred over to the master | |
2357 | * link and handled from there. | |
2358 | */ | |
2359 | if (ap->slave_link) { | |
2360 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2361 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2362 | ||
848e4c68 TH |
2363 | /* transfer control flags from master to slave */ |
2364 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2365 | ||
2366 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2367 | ata_eh_link_autopsy(ap->slave_link); |
2368 | ||
848e4c68 | 2369 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2370 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2371 | mehc->i.action |= sehc->i.action; | |
2372 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2373 | mehc->i.flags |= sehc->i.flags; | |
2374 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2375 | } | |
2376 | ||
2695e366 TH |
2377 | /* Autopsy of fanout ports can affect host link autopsy. |
2378 | * Perform host link autopsy last. | |
2379 | */ | |
071f44b1 | 2380 | if (sata_pmp_attached(ap)) |
2695e366 | 2381 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2382 | } |
2383 | ||
6521148c RH |
2384 | /** |
2385 | * ata_get_cmd_descript - get description for ATA command | |
2386 | * @command: ATA command code to get description for | |
2387 | * | |
2388 | * Return a textual description of the given command, or NULL if the | |
2389 | * command is not known. | |
2390 | * | |
2391 | * LOCKING: | |
2392 | * None | |
2393 | */ | |
2394 | const char *ata_get_cmd_descript(u8 command) | |
2395 | { | |
2396 | #ifdef CONFIG_ATA_VERBOSE_ERROR | |
2397 | static const struct | |
2398 | { | |
2399 | u8 command; | |
2400 | const char *text; | |
2401 | } cmd_descr[] = { | |
2402 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, | |
825e2d87 HR |
2403 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, |
2404 | { ATA_CMD_STANDBY, "STANDBY" }, | |
2405 | { ATA_CMD_IDLE, "IDLE" }, | |
2406 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, | |
2407 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, | |
3915c3b5 | 2408 | { ATA_CMD_DOWNLOAD_MICRO_DMA, "DOWNLOAD MICROCODE DMA" }, |
6521148c | 2409 | { ATA_CMD_NOP, "NOP" }, |
825e2d87 HR |
2410 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, |
2411 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, | |
2412 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, | |
2413 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, | |
2414 | { ATA_CMD_SERVICE, "SERVICE" }, | |
2415 | { ATA_CMD_READ, "READ DMA" }, | |
2416 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, | |
2417 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, | |
2418 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, | |
6521148c | 2419 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, |
825e2d87 HR |
2420 | { ATA_CMD_WRITE, "WRITE DMA" }, |
2421 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, | |
2422 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, | |
2423 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, | |
6521148c RH |
2424 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, |
2425 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, | |
2426 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, | |
2427 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, | |
2428 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, | |
3915c3b5 RH |
2429 | { ATA_CMD_FPDMA_SEND, "SEND FPDMA QUEUED" }, |
2430 | { ATA_CMD_FPDMA_RECV, "RECEIVE FPDMA QUEUED" }, | |
6521148c RH |
2431 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, |
2432 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, | |
2433 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, | |
2434 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, | |
2435 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, | |
2436 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, | |
2437 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, | |
2438 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, | |
825e2d87 | 2439 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, |
6521148c RH |
2440 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, |
2441 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, | |
2442 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, | |
2443 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, | |
2444 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, | |
2445 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, | |
2446 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, | |
2447 | { ATA_CMD_SLEEP, "SLEEP" }, | |
2448 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, | |
2449 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, | |
2450 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, | |
2451 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, | |
2452 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, | |
2453 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, | |
2454 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, | |
2455 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, | |
825e2d87 | 2456 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, |
3915c3b5 | 2457 | { ATA_CMD_TRUSTED_NONDATA, "TRUSTED NON-DATA" }, |
6521148c | 2458 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, |
825e2d87 | 2459 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, |
6521148c | 2460 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, |
825e2d87 | 2461 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, |
6521148c | 2462 | { ATA_CMD_PMP_READ, "READ BUFFER" }, |
3915c3b5 | 2463 | { ATA_CMD_PMP_READ_DMA, "READ BUFFER DMA" }, |
6521148c | 2464 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, |
3915c3b5 | 2465 | { ATA_CMD_PMP_WRITE_DMA, "WRITE BUFFER DMA" }, |
6521148c RH |
2466 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, |
2467 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, | |
2468 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, | |
2469 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, | |
2470 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, | |
2471 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, | |
2472 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, | |
2473 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, | |
2474 | { ATA_CMD_SMART, "SMART" }, | |
2475 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, | |
2476 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, | |
acad7627 | 2477 | { ATA_CMD_DSM, "DATA SET MANAGEMENT" }, |
825e2d87 HR |
2478 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, |
2479 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, | |
6521148c RH |
2480 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, |
2481 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, | |
2482 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, | |
825e2d87 | 2483 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, |
3915c3b5 RH |
2484 | { ATA_CMD_REQ_SENSE_DATA, "REQUEST SENSE DATA EXT" }, |
2485 | { ATA_CMD_SANITIZE_DEVICE, "SANITIZE DEVICE" }, | |
28a3fc22 | 2486 | { ATA_CMD_ZAC_MGMT_IN, "ZAC MANAGEMENT IN" }, |
27708a95 | 2487 | { ATA_CMD_ZAC_MGMT_OUT, "ZAC MANAGEMENT OUT" }, |
6521148c RH |
2488 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, |
2489 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, | |
2490 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, | |
2491 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, | |
2492 | { ATA_CMD_RESTORE, "RECALIBRATE" }, | |
2493 | { 0, NULL } /* terminate list */ | |
2494 | }; | |
2495 | ||
2496 | unsigned int i; | |
2497 | for (i = 0; cmd_descr[i].text; i++) | |
2498 | if (cmd_descr[i].command == command) | |
2499 | return cmd_descr[i].text; | |
2500 | #endif | |
2501 | ||
2502 | return NULL; | |
2503 | } | |
36aae28e | 2504 | EXPORT_SYMBOL_GPL(ata_get_cmd_descript); |
6521148c | 2505 | |
9b1e2658 TH |
2506 | /** |
2507 | * ata_eh_link_report - report error handling to user | |
0260731f | 2508 | * @link: ATA link EH is going on |
022bdb07 TH |
2509 | * |
2510 | * Report EH to user. | |
2511 | * | |
2512 | * LOCKING: | |
2513 | * None. | |
2514 | */ | |
9b1e2658 | 2515 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2516 | { |
0260731f TH |
2517 | struct ata_port *ap = link->ap; |
2518 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2519 | const char *frozen, *desc; |
462098b0 | 2520 | char tries_buf[6] = ""; |
022bdb07 TH |
2521 | int tag, nr_failed = 0; |
2522 | ||
94ff3d54 TH |
2523 | if (ehc->i.flags & ATA_EHI_QUIET) |
2524 | return; | |
2525 | ||
022bdb07 TH |
2526 | desc = NULL; |
2527 | if (ehc->i.desc[0] != '\0') | |
2528 | desc = ehc->i.desc; | |
2529 | ||
2530 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2531 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2532 | ||
b1c72916 TH |
2533 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2534 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2535 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2536 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2537 | continue; |
2538 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2539 | continue; | |
2540 | ||
2541 | nr_failed++; | |
2542 | } | |
2543 | ||
2544 | if (!nr_failed && !ehc->i.err_mask) | |
2545 | return; | |
2546 | ||
2547 | frozen = ""; | |
b51e9e5d | 2548 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2549 | frozen = " frozen"; |
2550 | ||
a1e10f7e | 2551 | if (ap->eh_tries < ATA_EH_MAX_TRIES) |
462098b0 | 2552 | snprintf(tries_buf, sizeof(tries_buf), " t%d", |
a1e10f7e TH |
2553 | ap->eh_tries); |
2554 | ||
022bdb07 | 2555 | if (ehc->i.dev) { |
a9a79dfe JP |
2556 | ata_dev_err(ehc->i.dev, "exception Emask 0x%x " |
2557 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2558 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2559 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2560 | if (desc) |
a9a79dfe | 2561 | ata_dev_err(ehc->i.dev, "%s\n", desc); |
022bdb07 | 2562 | } else { |
a9a79dfe JP |
2563 | ata_link_err(link, "exception Emask 0x%x " |
2564 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", | |
2565 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2566 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2567 | if (desc) |
a9a79dfe | 2568 | ata_link_err(link, "%s\n", desc); |
022bdb07 TH |
2569 | } |
2570 | ||
6521148c | 2571 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2572 | if (ehc->i.serror) |
a9a79dfe | 2573 | ata_link_err(link, |
1333e194 RH |
2574 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2575 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2576 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2577 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2578 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2579 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2580 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2581 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2582 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2583 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2584 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2585 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2586 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2587 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2588 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2589 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2590 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2591 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
6521148c | 2592 | #endif |
1333e194 | 2593 | |
022bdb07 TH |
2594 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
2595 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 2596 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2597 | char data_buf[20] = ""; |
2598 | char cdb_buf[70] = ""; | |
022bdb07 | 2599 | |
0260731f | 2600 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2601 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2602 | continue; |
2603 | ||
abb6a889 TH |
2604 | if (qc->dma_dir != DMA_NONE) { |
2605 | static const char *dma_str[] = { | |
2606 | [DMA_BIDIRECTIONAL] = "bidi", | |
2607 | [DMA_TO_DEVICE] = "out", | |
2608 | [DMA_FROM_DEVICE] = "in", | |
2609 | }; | |
fb1b8b11 GU |
2610 | const char *prot_str = NULL; |
2611 | ||
2612 | switch (qc->tf.protocol) { | |
2613 | case ATA_PROT_UNKNOWN: | |
2614 | prot_str = "unknown"; | |
2615 | break; | |
2616 | case ATA_PROT_NODATA: | |
2617 | prot_str = "nodata"; | |
2618 | break; | |
2619 | case ATA_PROT_PIO: | |
2620 | prot_str = "pio"; | |
2621 | break; | |
2622 | case ATA_PROT_DMA: | |
2623 | prot_str = "dma"; | |
2624 | break; | |
2625 | case ATA_PROT_NCQ: | |
2626 | prot_str = "ncq dma"; | |
2627 | break; | |
2628 | case ATA_PROT_NCQ_NODATA: | |
2629 | prot_str = "ncq nodata"; | |
2630 | break; | |
2631 | case ATAPI_PROT_NODATA: | |
2632 | prot_str = "nodata"; | |
2633 | break; | |
2634 | case ATAPI_PROT_PIO: | |
2635 | prot_str = "pio"; | |
2636 | break; | |
2637 | case ATAPI_PROT_DMA: | |
2638 | prot_str = "dma"; | |
2639 | break; | |
2640 | } | |
abb6a889 | 2641 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", |
fb1b8b11 | 2642 | prot_str, qc->nbytes, dma_str[qc->dma_dir]); |
abb6a889 TH |
2643 | } |
2644 | ||
6521148c | 2645 | if (ata_is_atapi(qc->tf.protocol)) { |
a13b0c9d HR |
2646 | const u8 *cdb = qc->cdb; |
2647 | size_t cdb_len = qc->dev->cdb_len; | |
2648 | ||
cbba5b0e HR |
2649 | if (qc->scsicmd) { |
2650 | cdb = qc->scsicmd->cmnd; | |
2651 | cdb_len = qc->scsicmd->cmd_len; | |
2652 | } | |
2653 | __scsi_format_command(cdb_buf, sizeof(cdb_buf), | |
2654 | cdb, cdb_len); | |
6521148c RH |
2655 | } else { |
2656 | const char *descr = ata_get_cmd_descript(cmd->command); | |
2657 | if (descr) | |
a9a79dfe JP |
2658 | ata_dev_err(qc->dev, "failed command: %s\n", |
2659 | descr); | |
6521148c | 2660 | } |
abb6a889 | 2661 | |
a9a79dfe | 2662 | ata_dev_err(qc->dev, |
8a937581 | 2663 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
abb6a889 | 2664 | "tag %d%s\n %s" |
8a937581 | 2665 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2666 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2667 | cmd->command, cmd->feature, cmd->nsect, |
2668 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2669 | cmd->hob_feature, cmd->hob_nsect, | |
2670 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2671 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2672 | res->command, res->feature, res->nsect, |
2673 | res->lbal, res->lbam, res->lbah, | |
2674 | res->hob_feature, res->hob_nsect, | |
2675 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2676 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2677 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 | 2678 | |
6521148c | 2679 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2680 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
e87fd28c | 2681 | ATA_SENSE | ATA_ERR)) { |
1333e194 | 2682 | if (res->command & ATA_BUSY) |
a9a79dfe | 2683 | ata_dev_err(qc->dev, "status: { Busy }\n"); |
1333e194 | 2684 | else |
e87fd28c | 2685 | ata_dev_err(qc->dev, "status: { %s%s%s%s%s}\n", |
1333e194 RH |
2686 | res->command & ATA_DRDY ? "DRDY " : "", |
2687 | res->command & ATA_DF ? "DF " : "", | |
2688 | res->command & ATA_DRQ ? "DRQ " : "", | |
e87fd28c | 2689 | res->command & ATA_SENSE ? "SENSE " : "", |
2dcb407e | 2690 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2691 | } |
2692 | ||
2693 | if (cmd->command != ATA_CMD_PACKET && | |
eec7e1c1 AA |
2694 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_AMNF | |
2695 | ATA_IDNF | ATA_ABORTED))) | |
2696 | ata_dev_err(qc->dev, "error: { %s%s%s%s%s}\n", | |
1333e194 RH |
2697 | res->feature & ATA_ICRC ? "ICRC " : "", |
2698 | res->feature & ATA_UNC ? "UNC " : "", | |
eec7e1c1 | 2699 | res->feature & ATA_AMNF ? "AMNF " : "", |
1333e194 | 2700 | res->feature & ATA_IDNF ? "IDNF " : "", |
2dcb407e | 2701 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
6521148c | 2702 | #endif |
022bdb07 TH |
2703 | } |
2704 | } | |
2705 | ||
9b1e2658 TH |
2706 | /** |
2707 | * ata_eh_report - report error handling to user | |
2708 | * @ap: ATA port to report EH about | |
2709 | * | |
2710 | * Report EH to user. | |
2711 | * | |
2712 | * LOCKING: | |
2713 | * None. | |
2714 | */ | |
fb7fd614 | 2715 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2716 | { |
2717 | struct ata_link *link; | |
2718 | ||
1eca4365 | 2719 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2720 | ata_eh_link_report(link); |
2721 | } | |
2722 | ||
cc0680a5 | 2723 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2724 | unsigned int *classes, unsigned long deadline, |
2725 | bool clear_classes) | |
d87fa38e | 2726 | { |
f58229f8 | 2727 | struct ata_device *dev; |
d87fa38e | 2728 | |
b1c72916 | 2729 | if (clear_classes) |
1eca4365 | 2730 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2731 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2732 | |
f046519f | 2733 | return reset(link, classes, deadline); |
d87fa38e TH |
2734 | } |
2735 | ||
e8411fba | 2736 | static int ata_eh_followup_srst_needed(struct ata_link *link, int rc) |
664faf09 | 2737 | { |
45db2f6c | 2738 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2739 | return 0; |
5dbfc9cb TH |
2740 | if (rc == -EAGAIN) |
2741 | return 1; | |
071f44b1 | 2742 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2743 | return 1; |
664faf09 TH |
2744 | return 0; |
2745 | } | |
2746 | ||
fb7fd614 TH |
2747 | int ata_eh_reset(struct ata_link *link, int classify, |
2748 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2749 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2750 | { |
afaa5c37 | 2751 | struct ata_port *ap = link->ap; |
b1c72916 | 2752 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2753 | struct ata_eh_context *ehc = &link->eh_context; |
705d2014 | 2754 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
664faf09 | 2755 | unsigned int *classes = ehc->classes; |
416dc9ed | 2756 | unsigned int lflags = link->flags; |
1cdaf534 | 2757 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2758 | int max_tries = 0, try = 0; |
b1c72916 | 2759 | struct ata_link *failed_link; |
f58229f8 | 2760 | struct ata_device *dev; |
416dc9ed | 2761 | unsigned long deadline, now; |
022bdb07 | 2762 | ata_reset_fn_t reset; |
afaa5c37 | 2763 | unsigned long flags; |
416dc9ed | 2764 | u32 sstatus; |
b1c72916 | 2765 | int nr_unknown, rc; |
022bdb07 | 2766 | |
932648b0 TH |
2767 | /* |
2768 | * Prepare to reset | |
2769 | */ | |
d8af0eb6 TH |
2770 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2771 | max_tries++; | |
ca6d43b0 DW |
2772 | if (link->flags & ATA_LFLAG_RST_ONCE) |
2773 | max_tries = 1; | |
05944bdf TH |
2774 | if (link->flags & ATA_LFLAG_NO_HRST) |
2775 | hardreset = NULL; | |
2776 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2777 | softreset = NULL; | |
d8af0eb6 | 2778 | |
25985edc | 2779 | /* make sure each reset attempt is at least COOL_DOWN apart */ |
19b72321 TH |
2780 | if (ehc->i.flags & ATA_EHI_DID_RESET) { |
2781 | now = jiffies; | |
2782 | WARN_ON(time_after(ehc->last_reset, now)); | |
2783 | deadline = ata_deadline(ehc->last_reset, | |
2784 | ATA_EH_RESET_COOL_DOWN); | |
2785 | if (time_before(now, deadline)) | |
2786 | schedule_timeout_uninterruptible(deadline - now); | |
2787 | } | |
0a2c0f56 | 2788 | |
afaa5c37 TH |
2789 | spin_lock_irqsave(ap->lock, flags); |
2790 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2791 | spin_unlock_irqrestore(ap->lock, flags); | |
2792 | ||
cf480626 | 2793 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2794 | |
1eca4365 | 2795 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2796 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2797 | * may change configuration and be in PIO0 timing. If | |
2798 | * we do a hard reset (or are coming from power on) | |
2799 | * this is true for ATA or ATAPI. Until we've set a | |
2800 | * suitable controller mode we should not touch the | |
2801 | * bus as we may be talking too fast. | |
2802 | */ | |
2803 | dev->pio_mode = XFER_PIO_0; | |
5416912a | 2804 | dev->dma_mode = 0xff; |
cdeab114 TH |
2805 | |
2806 | /* If the controller has a pio mode setup function | |
2807 | * then use it to set the chipset to rights. Don't | |
2808 | * touch the DMA setup as that will be dealt with when | |
2809 | * configuring devices. | |
2810 | */ | |
2811 | if (ap->ops->set_piomode) | |
2812 | ap->ops->set_piomode(ap, dev); | |
2813 | } | |
2814 | ||
cf480626 | 2815 | /* prefer hardreset */ |
932648b0 | 2816 | reset = NULL; |
cf480626 TH |
2817 | ehc->i.action &= ~ATA_EH_RESET; |
2818 | if (hardreset) { | |
2819 | reset = hardreset; | |
a674050e | 2820 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2821 | } else if (softreset) { |
cf480626 | 2822 | reset = softreset; |
a674050e | 2823 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2824 | } |
f5914a46 TH |
2825 | |
2826 | if (prereset) { | |
b1c72916 TH |
2827 | unsigned long deadline = ata_deadline(jiffies, |
2828 | ATA_EH_PRERESET_TIMEOUT); | |
2829 | ||
2830 | if (slave) { | |
2831 | sehc->i.action &= ~ATA_EH_RESET; | |
2832 | sehc->i.action |= ehc->i.action; | |
2833 | } | |
2834 | ||
2835 | rc = prereset(link, deadline); | |
2836 | ||
2837 | /* If present, do prereset on slave link too. Reset | |
2838 | * is skipped iff both master and slave links report | |
2839 | * -ENOENT or clear ATA_EH_RESET. | |
2840 | */ | |
2841 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2842 | int tmp; | |
2843 | ||
2844 | tmp = prereset(slave, deadline); | |
2845 | if (tmp != -ENOENT) | |
2846 | rc = tmp; | |
2847 | ||
2848 | ehc->i.action |= sehc->i.action; | |
2849 | } | |
2850 | ||
f5914a46 | 2851 | if (rc) { |
c961922b | 2852 | if (rc == -ENOENT) { |
a9a79dfe | 2853 | ata_link_dbg(link, "port disabled--ignoring\n"); |
cf480626 | 2854 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2855 | |
1eca4365 | 2856 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2857 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2858 | |
2859 | rc = 0; | |
c961922b | 2860 | } else |
a9a79dfe JP |
2861 | ata_link_err(link, |
2862 | "prereset failed (errno=%d)\n", | |
2863 | rc); | |
fccb6ea5 | 2864 | goto out; |
f5914a46 | 2865 | } |
f5914a46 | 2866 | |
932648b0 | 2867 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2868 | * bang classes, thaw and return. |
932648b0 TH |
2869 | */ |
2870 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2871 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2872 | classes[dev->devno] = ATA_DEV_NONE; |
d6515e6f TH |
2873 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
2874 | ata_is_host_link(link)) | |
2875 | ata_eh_thaw_port(ap); | |
932648b0 TH |
2876 | rc = 0; |
2877 | goto out; | |
2878 | } | |
f5914a46 TH |
2879 | } |
2880 | ||
022bdb07 | 2881 | retry: |
932648b0 TH |
2882 | /* |
2883 | * Perform reset | |
2884 | */ | |
dc98c32c TH |
2885 | if (ata_is_host_link(link)) |
2886 | ata_eh_freeze_port(ap); | |
2887 | ||
341c2c95 | 2888 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2889 | |
932648b0 TH |
2890 | if (reset) { |
2891 | if (verbose) | |
a9a79dfe JP |
2892 | ata_link_info(link, "%s resetting link\n", |
2893 | reset == softreset ? "soft" : "hard"); | |
932648b0 TH |
2894 | |
2895 | /* mark that this EH session started with reset */ | |
19b72321 | 2896 | ehc->last_reset = jiffies; |
932648b0 TH |
2897 | if (reset == hardreset) |
2898 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2899 | else | |
2900 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2901 | |
b1c72916 TH |
2902 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2903 | if (rc && rc != -EAGAIN) { | |
2904 | failed_link = link; | |
5dbfc9cb | 2905 | goto fail; |
b1c72916 TH |
2906 | } |
2907 | ||
2908 | /* hardreset slave link if existent */ | |
2909 | if (slave && reset == hardreset) { | |
2910 | int tmp; | |
2911 | ||
2912 | if (verbose) | |
a9a79dfe | 2913 | ata_link_info(slave, "hard resetting link\n"); |
b1c72916 TH |
2914 | |
2915 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2916 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2917 | false); | |
2918 | switch (tmp) { | |
2919 | case -EAGAIN: | |
2920 | rc = -EAGAIN; | |
2921 | case 0: | |
2922 | break; | |
2923 | default: | |
2924 | failed_link = slave; | |
2925 | rc = tmp; | |
2926 | goto fail; | |
2927 | } | |
2928 | } | |
022bdb07 | 2929 | |
b1c72916 | 2930 | /* perform follow-up SRST if necessary */ |
932648b0 | 2931 | if (reset == hardreset && |
e8411fba | 2932 | ata_eh_followup_srst_needed(link, rc)) { |
932648b0 | 2933 | reset = softreset; |
022bdb07 | 2934 | |
932648b0 | 2935 | if (!reset) { |
a9a79dfe JP |
2936 | ata_link_err(link, |
2937 | "follow-up softreset required but no softreset available\n"); | |
b1c72916 | 2938 | failed_link = link; |
932648b0 TH |
2939 | rc = -EINVAL; |
2940 | goto fail; | |
2941 | } | |
664faf09 | 2942 | |
932648b0 | 2943 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2944 | rc = ata_do_reset(link, reset, classes, deadline, true); |
fe2c4d01 TH |
2945 | if (rc) { |
2946 | failed_link = link; | |
2947 | goto fail; | |
2948 | } | |
664faf09 | 2949 | } |
932648b0 TH |
2950 | } else { |
2951 | if (verbose) | |
a9a79dfe JP |
2952 | ata_link_info(link, |
2953 | "no reset method available, skipping reset\n"); | |
932648b0 TH |
2954 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) |
2955 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2956 | } |
2957 | ||
932648b0 TH |
2958 | /* |
2959 | * Post-reset processing | |
2960 | */ | |
1eca4365 | 2961 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2962 | /* After the reset, the device state is PIO 0 and the |
2963 | * controller state is undefined. Reset also wakes up | |
2964 | * drives from sleeping mode. | |
2965 | */ | |
2966 | dev->pio_mode = XFER_PIO_0; | |
2967 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2968 | |
3b761d3d TH |
2969 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
2970 | continue; | |
2971 | ||
2972 | /* apply class override */ | |
2973 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2974 | classes[dev->devno] = ATA_DEV_ATA; | |
2975 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2976 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
022bdb07 TH |
2977 | } |
2978 | ||
416dc9ed TH |
2979 | /* record current link speed */ |
2980 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2981 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2982 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2983 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2984 | |
dc98c32c TH |
2985 | /* thaw the port */ |
2986 | if (ata_is_host_link(link)) | |
2987 | ata_eh_thaw_port(ap); | |
2988 | ||
f046519f TH |
2989 | /* postreset() should clear hardware SError. Although SError |
2990 | * is cleared during link resume, clearing SError here is | |
2991 | * necessary as some PHYs raise hotplug events after SRST. | |
2992 | * This introduces race condition where hotplug occurs between | |
2993 | * reset and here. This race is mediated by cross checking | |
2994 | * link onlineness and classification result later. | |
2995 | */ | |
b1c72916 | 2996 | if (postreset) { |
416dc9ed | 2997 | postreset(link, classes); |
b1c72916 TH |
2998 | if (slave) |
2999 | postreset(slave, classes); | |
3000 | } | |
20952b69 | 3001 | |
1e641060 | 3002 | /* |
8c56cacc TH |
3003 | * Some controllers can't be frozen very well and may set spurious |
3004 | * error conditions during reset. Clear accumulated error | |
3005 | * information and re-thaw the port if frozen. As reset is the | |
3006 | * final recovery action and we cross check link onlineness against | |
3007 | * device classification later, no hotplug event is lost by this. | |
1e641060 | 3008 | */ |
f046519f | 3009 | spin_lock_irqsave(link->ap->lock, flags); |
1e641060 | 3010 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
b1c72916 | 3011 | if (slave) |
1e641060 TH |
3012 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
3013 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
f046519f TH |
3014 | spin_unlock_irqrestore(link->ap->lock, flags); |
3015 | ||
8c56cacc TH |
3016 | if (ap->pflags & ATA_PFLAG_FROZEN) |
3017 | ata_eh_thaw_port(ap); | |
3018 | ||
3b761d3d TH |
3019 | /* |
3020 | * Make sure onlineness and classification result correspond. | |
f046519f TH |
3021 | * Hotplug could have happened during reset and some |
3022 | * controllers fail to wait while a drive is spinning up after | |
3023 | * being hotplugged causing misdetection. By cross checking | |
3b761d3d TH |
3024 | * link on/offlineness and classification result, those |
3025 | * conditions can be reliably detected and retried. | |
f046519f | 3026 | */ |
b1c72916 | 3027 | nr_unknown = 0; |
1eca4365 | 3028 | ata_for_each_dev(dev, link, ALL) { |
3b761d3d TH |
3029 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
3030 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe | 3031 | ata_dev_dbg(dev, "link online but device misclassified\n"); |
3b761d3d | 3032 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 3033 | nr_unknown++; |
3b761d3d TH |
3034 | } |
3035 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { | |
3036 | if (ata_class_enabled(classes[dev->devno])) | |
a9a79dfe JP |
3037 | ata_dev_dbg(dev, |
3038 | "link offline, clearing class %d to NONE\n", | |
3039 | classes[dev->devno]); | |
3b761d3d TH |
3040 | classes[dev->devno] = ATA_DEV_NONE; |
3041 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
a9a79dfe JP |
3042 | ata_dev_dbg(dev, |
3043 | "link status unknown, clearing UNKNOWN to NONE\n"); | |
3b761d3d | 3044 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 | 3045 | } |
f046519f TH |
3046 | } |
3047 | ||
b1c72916 | 3048 | if (classify && nr_unknown) { |
f046519f | 3049 | if (try < max_tries) { |
a9a79dfe JP |
3050 | ata_link_warn(link, |
3051 | "link online but %d devices misclassified, retrying\n", | |
3052 | nr_unknown); | |
b1c72916 | 3053 | failed_link = link; |
f046519f TH |
3054 | rc = -EAGAIN; |
3055 | goto fail; | |
3056 | } | |
a9a79dfe JP |
3057 | ata_link_warn(link, |
3058 | "link online but %d devices misclassified, " | |
3059 | "device detection might fail\n", nr_unknown); | |
f046519f TH |
3060 | } |
3061 | ||
416dc9ed | 3062 | /* reset successful, schedule revalidation */ |
cf480626 | 3063 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
3064 | if (slave) |
3065 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
6b7ae954 | 3066 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 3067 | ehc->i.action |= ATA_EH_REVALIDATE; |
6b7ae954 | 3068 | link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */ |
ae791c05 | 3069 | |
416dc9ed | 3070 | rc = 0; |
fccb6ea5 TH |
3071 | out: |
3072 | /* clear hotplug flag */ | |
3073 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
3074 | if (slave) |
3075 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
3076 | |
3077 | spin_lock_irqsave(ap->lock, flags); | |
3078 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
3079 | spin_unlock_irqrestore(ap->lock, flags); | |
3080 | ||
022bdb07 | 3081 | return rc; |
416dc9ed TH |
3082 | |
3083 | fail: | |
5958e302 TH |
3084 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
3085 | if (!ata_is_host_link(link) && | |
3086 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
3087 | rc = -ERESTART; | |
3088 | ||
7a46c078 | 3089 | if (try >= max_tries) { |
8ea7645c TH |
3090 | /* |
3091 | * Thaw host port even if reset failed, so that the port | |
3092 | * can be retried on the next phy event. This risks | |
3093 | * repeated EH runs but seems to be a better tradeoff than | |
3094 | * shutting down a port after a botched hotplug attempt. | |
3095 | */ | |
3096 | if (ata_is_host_link(link)) | |
3097 | ata_eh_thaw_port(ap); | |
416dc9ed | 3098 | goto out; |
8ea7645c | 3099 | } |
416dc9ed TH |
3100 | |
3101 | now = jiffies; | |
3102 | if (time_before(now, deadline)) { | |
3103 | unsigned long delta = deadline - now; | |
3104 | ||
a9a79dfe | 3105 | ata_link_warn(failed_link, |
0a2c0f56 TH |
3106 | "reset failed (errno=%d), retrying in %u secs\n", |
3107 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed | 3108 | |
c0c362b6 | 3109 | ata_eh_release(ap); |
416dc9ed TH |
3110 | while (delta) |
3111 | delta = schedule_timeout_uninterruptible(delta); | |
c0c362b6 | 3112 | ata_eh_acquire(ap); |
416dc9ed TH |
3113 | } |
3114 | ||
7a46c078 GG |
3115 | /* |
3116 | * While disks spinup behind PMP, some controllers fail sending SRST. | |
3117 | * They need to be reset - as well as the PMP - before retrying. | |
3118 | */ | |
3119 | if (rc == -ERESTART) { | |
3120 | if (ata_is_host_link(link)) | |
3121 | ata_eh_thaw_port(ap); | |
3122 | goto out; | |
3123 | } | |
3124 | ||
b1c72916 | 3125 | if (try == max_tries - 1) { |
a07d499b | 3126 | sata_down_spd_limit(link, 0); |
b1c72916 | 3127 | if (slave) |
a07d499b | 3128 | sata_down_spd_limit(slave, 0); |
b1c72916 | 3129 | } else if (rc == -EPIPE) |
a07d499b | 3130 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 3131 | |
416dc9ed TH |
3132 | if (hardreset) |
3133 | reset = hardreset; | |
3134 | goto retry; | |
022bdb07 TH |
3135 | } |
3136 | ||
45fabbb7 EO |
3137 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
3138 | { | |
3139 | struct ata_link *link; | |
3140 | struct ata_device *dev; | |
3141 | unsigned long flags; | |
3142 | ||
3143 | /* | |
3144 | * This function can be thought of as an extended version of | |
3145 | * ata_eh_about_to_do() specially crafted to accommodate the | |
3146 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
3147 | * does not leave the do {} while () loop in ata_eh_recover as | |
3148 | * long as the timeout for a park request to *one* device on | |
3149 | * the port has not expired, and since we still want to pick | |
3150 | * up park requests to other devices on the same port or | |
3151 | * timeout updates for the same device, we have to pull | |
3152 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
3153 | * ourselves at the beginning of each pass over the loop. | |
3154 | * | |
3155 | * Additionally, all write accesses to &ap->park_req_pending | |
16735d02 | 3156 | * through reinit_completion() (see below) or complete_all() |
45fabbb7 EO |
3157 | * (see ata_scsi_park_store()) are protected by the host lock. |
3158 | * As a result we have that park_req_pending.done is zero on | |
3159 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
3160 | * *all* devices on port ap have been pulled into the | |
3161 | * respective eh_context structs. If, and only if, | |
3162 | * park_req_pending.done is non-zero by the time we reach | |
3163 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
3164 | * has been scheduled for at least one of the devices on port | |
3165 | * ap and we have to cycle over the do {} while () loop in | |
3166 | * ata_eh_recover() again. | |
3167 | */ | |
3168 | ||
3169 | spin_lock_irqsave(ap->lock, flags); | |
16735d02 | 3170 | reinit_completion(&ap->park_req_pending); |
1eca4365 TH |
3171 | ata_for_each_link(link, ap, EDGE) { |
3172 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3173 | struct ata_eh_info *ehi = &link->eh_info; |
3174 | ||
3175 | link->eh_context.i.dev_action[dev->devno] |= | |
3176 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
3177 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
3178 | } | |
3179 | } | |
3180 | spin_unlock_irqrestore(ap->lock, flags); | |
3181 | } | |
3182 | ||
3183 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
3184 | { | |
3185 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
3186 | struct ata_taskfile tf; | |
3187 | unsigned int err_mask; | |
3188 | ||
3189 | ata_tf_init(dev, &tf); | |
3190 | if (park) { | |
3191 | ehc->unloaded_mask |= 1 << dev->devno; | |
3192 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
3193 | tf.feature = 0x44; | |
3194 | tf.lbal = 0x4c; | |
3195 | tf.lbam = 0x4e; | |
3196 | tf.lbah = 0x55; | |
3197 | } else { | |
3198 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
3199 | tf.command = ATA_CMD_CHK_POWER; | |
3200 | } | |
3201 | ||
3202 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
bd18bc04 | 3203 | tf.protocol = ATA_PROT_NODATA; |
45fabbb7 EO |
3204 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
3205 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
a9a79dfe | 3206 | ata_dev_err(dev, "head unload failed!\n"); |
45fabbb7 EO |
3207 | ehc->unloaded_mask &= ~(1 << dev->devno); |
3208 | } | |
3209 | } | |
3210 | ||
0260731f | 3211 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 3212 | struct ata_device **r_failed_dev) |
022bdb07 | 3213 | { |
0260731f TH |
3214 | struct ata_port *ap = link->ap; |
3215 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 3216 | struct ata_device *dev; |
8c3c52a8 | 3217 | unsigned int new_mask = 0; |
084fe639 | 3218 | unsigned long flags; |
f58229f8 | 3219 | int rc = 0; |
022bdb07 TH |
3220 | |
3221 | DPRINTK("ENTER\n"); | |
3222 | ||
8c3c52a8 TH |
3223 | /* For PATA drive side cable detection to work, IDENTIFY must |
3224 | * be done backwards such that PDIAG- is released by the slave | |
3225 | * device before the master device is identified. | |
3226 | */ | |
1eca4365 | 3227 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
3228 | unsigned int action = ata_eh_dev_action(dev); |
3229 | unsigned int readid_flags = 0; | |
022bdb07 | 3230 | |
bff04647 TH |
3231 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
3232 | readid_flags |= ATA_READID_POSTRESET; | |
3233 | ||
9666f400 | 3234 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
3235 | WARN_ON(dev->class == ATA_DEV_PMP); |
3236 | ||
b1c72916 | 3237 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 3238 | rc = -EIO; |
8c3c52a8 | 3239 | goto err; |
022bdb07 TH |
3240 | } |
3241 | ||
0260731f | 3242 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
3243 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
3244 | readid_flags); | |
022bdb07 | 3245 | if (rc) |
8c3c52a8 | 3246 | goto err; |
022bdb07 | 3247 | |
0260731f | 3248 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 3249 | |
baa1e78a TH |
3250 | /* Configuration may have changed, reconfigure |
3251 | * transfer mode. | |
3252 | */ | |
3253 | ehc->i.flags |= ATA_EHI_SETMODE; | |
3254 | ||
3057ac3c | 3255 | /* schedule the scsi_rescan_device() here */ |
ad72cf98 | 3256 | schedule_work(&(ap->scsi_rescan_task)); |
084fe639 TH |
3257 | } else if (dev->class == ATA_DEV_UNKNOWN && |
3258 | ehc->tries[dev->devno] && | |
3259 | ata_class_enabled(ehc->classes[dev->devno])) { | |
842faa6c TH |
3260 | /* Temporarily set dev->class, it will be |
3261 | * permanently set once all configurations are | |
3262 | * complete. This is necessary because new | |
3263 | * device configuration is done in two | |
3264 | * separate loops. | |
3265 | */ | |
084fe639 TH |
3266 | dev->class = ehc->classes[dev->devno]; |
3267 | ||
633273a3 TH |
3268 | if (dev->class == ATA_DEV_PMP) |
3269 | rc = sata_pmp_attach(dev); | |
3270 | else | |
3271 | rc = ata_dev_read_id(dev, &dev->class, | |
3272 | readid_flags, dev->id); | |
842faa6c TH |
3273 | |
3274 | /* read_id might have changed class, store and reset */ | |
3275 | ehc->classes[dev->devno] = dev->class; | |
3276 | dev->class = ATA_DEV_UNKNOWN; | |
3277 | ||
8c3c52a8 TH |
3278 | switch (rc) { |
3279 | case 0: | |
99cf610a TH |
3280 | /* clear error info accumulated during probe */ |
3281 | ata_ering_clear(&dev->ering); | |
f58229f8 | 3282 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
3283 | break; |
3284 | case -ENOENT: | |
55a8e2c8 TH |
3285 | /* IDENTIFY was issued to non-existent |
3286 | * device. No need to reset. Just | |
842faa6c | 3287 | * thaw and ignore the device. |
55a8e2c8 TH |
3288 | */ |
3289 | ata_eh_thaw_port(ap); | |
084fe639 | 3290 | break; |
8c3c52a8 | 3291 | default: |
8c3c52a8 | 3292 | goto err; |
084fe639 | 3293 | } |
8c3c52a8 TH |
3294 | } |
3295 | } | |
084fe639 | 3296 | |
c1c4e8d5 | 3297 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
3298 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
3299 | if (ap->ops->cable_detect) | |
3300 | ap->cbl = ap->ops->cable_detect(ap); | |
3301 | ata_force_cbl(ap); | |
3302 | } | |
c1c4e8d5 | 3303 | |
8c3c52a8 TH |
3304 | /* Configure new devices forward such that user doesn't see |
3305 | * device detection messages backwards. | |
3306 | */ | |
1eca4365 | 3307 | ata_for_each_dev(dev, link, ALL) { |
4f7c2874 | 3308 | if (!(new_mask & (1 << dev->devno))) |
8c3c52a8 TH |
3309 | continue; |
3310 | ||
842faa6c TH |
3311 | dev->class = ehc->classes[dev->devno]; |
3312 | ||
4f7c2874 TH |
3313 | if (dev->class == ATA_DEV_PMP) |
3314 | continue; | |
3315 | ||
8c3c52a8 TH |
3316 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
3317 | rc = ata_dev_configure(dev); | |
3318 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
842faa6c TH |
3319 | if (rc) { |
3320 | dev->class = ATA_DEV_UNKNOWN; | |
8c3c52a8 | 3321 | goto err; |
842faa6c | 3322 | } |
8c3c52a8 TH |
3323 | |
3324 | spin_lock_irqsave(ap->lock, flags); | |
3325 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
3326 | spin_unlock_irqrestore(ap->lock, flags); | |
3327 | ||
3328 | /* new device discovered, configure xfermode */ | |
3329 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
3330 | } |
3331 | ||
8c3c52a8 | 3332 | return 0; |
022bdb07 | 3333 | |
8c3c52a8 TH |
3334 | err: |
3335 | *r_failed_dev = dev; | |
3336 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
3337 | return rc; |
3338 | } | |
3339 | ||
6f1d1e3a TH |
3340 | /** |
3341 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
3342 | * @link: link on which timings will be programmed | |
98a1708d | 3343 | * @r_failed_dev: out parameter for failed device |
6f1d1e3a TH |
3344 | * |
3345 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3346 | * ata_set_mode() fails, pointer to the failing device is | |
3347 | * returned in @r_failed_dev. | |
3348 | * | |
3349 | * LOCKING: | |
3350 | * PCI/etc. bus probe sem. | |
3351 | * | |
3352 | * RETURNS: | |
3353 | * 0 on success, negative errno otherwise | |
3354 | */ | |
3355 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
3356 | { | |
3357 | struct ata_port *ap = link->ap; | |
00115e0f TH |
3358 | struct ata_device *dev; |
3359 | int rc; | |
6f1d1e3a | 3360 | |
76326ac1 | 3361 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 3362 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
3363 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
3364 | struct ata_ering_entry *ent; | |
3365 | ||
3366 | ent = ata_ering_top(&dev->ering); | |
3367 | if (ent) | |
3368 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
3369 | } | |
3370 | } | |
3371 | ||
6f1d1e3a TH |
3372 | /* has private set_mode? */ |
3373 | if (ap->ops->set_mode) | |
00115e0f TH |
3374 | rc = ap->ops->set_mode(link, r_failed_dev); |
3375 | else | |
3376 | rc = ata_do_set_mode(link, r_failed_dev); | |
3377 | ||
3378 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 3379 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
3380 | struct ata_eh_context *ehc = &link->eh_context; |
3381 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
3382 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
3383 | ||
3384 | if (dev->xfer_mode != saved_xfer_mode || | |
3385 | ata_ncq_enabled(dev) != saved_ncq) | |
3386 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
3387 | } | |
3388 | ||
3389 | return rc; | |
6f1d1e3a TH |
3390 | } |
3391 | ||
11fc33da TH |
3392 | /** |
3393 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
3394 | * @dev: ATAPI device to clear UA for | |
3395 | * | |
3396 | * Resets and other operations can make an ATAPI device raise | |
3397 | * UNIT ATTENTION which causes the next operation to fail. This | |
3398 | * function clears UA. | |
3399 | * | |
3400 | * LOCKING: | |
3401 | * EH context (may sleep). | |
3402 | * | |
3403 | * RETURNS: | |
3404 | * 0 on success, -errno on failure. | |
3405 | */ | |
3406 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
3407 | { | |
3408 | int i; | |
3409 | ||
3410 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 3411 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
3412 | u8 sense_key = 0; |
3413 | unsigned int err_mask; | |
3414 | ||
3415 | err_mask = atapi_eh_tur(dev, &sense_key); | |
3416 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3417 | ata_dev_warn(dev, |
3418 | "TEST_UNIT_READY failed (err_mask=0x%x)\n", | |
3419 | err_mask); | |
11fc33da TH |
3420 | return -EIO; |
3421 | } | |
3422 | ||
3423 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
3424 | return 0; | |
3425 | ||
3426 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
3427 | if (err_mask) { | |
a9a79dfe | 3428 | ata_dev_warn(dev, "failed to clear " |
11fc33da TH |
3429 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); |
3430 | return -EIO; | |
3431 | } | |
3432 | } | |
3433 | ||
a9a79dfe JP |
3434 | ata_dev_warn(dev, "UNIT ATTENTION persists after %d tries\n", |
3435 | ATA_EH_UA_TRIES); | |
11fc33da TH |
3436 | |
3437 | return 0; | |
3438 | } | |
3439 | ||
6013efd8 TH |
3440 | /** |
3441 | * ata_eh_maybe_retry_flush - Retry FLUSH if necessary | |
3442 | * @dev: ATA device which may need FLUSH retry | |
3443 | * | |
3444 | * If @dev failed FLUSH, it needs to be reported upper layer | |
3445 | * immediately as it means that @dev failed to remap and already | |
3446 | * lost at least a sector and further FLUSH retrials won't make | |
3447 | * any difference to the lost sector. However, if FLUSH failed | |
3448 | * for other reasons, for example transmission error, FLUSH needs | |
3449 | * to be retried. | |
3450 | * | |
3451 | * This function determines whether FLUSH failure retry is | |
3452 | * necessary and performs it if so. | |
3453 | * | |
3454 | * RETURNS: | |
3455 | * 0 if EH can continue, -errno if EH needs to be repeated. | |
3456 | */ | |
3457 | static int ata_eh_maybe_retry_flush(struct ata_device *dev) | |
3458 | { | |
3459 | struct ata_link *link = dev->link; | |
3460 | struct ata_port *ap = link->ap; | |
3461 | struct ata_queued_cmd *qc; | |
3462 | struct ata_taskfile tf; | |
3463 | unsigned int err_mask; | |
3464 | int rc = 0; | |
3465 | ||
3466 | /* did flush fail for this device? */ | |
3467 | if (!ata_tag_valid(link->active_tag)) | |
3468 | return 0; | |
3469 | ||
3470 | qc = __ata_qc_from_tag(ap, link->active_tag); | |
3471 | if (qc->dev != dev || (qc->tf.command != ATA_CMD_FLUSH_EXT && | |
3472 | qc->tf.command != ATA_CMD_FLUSH)) | |
3473 | return 0; | |
3474 | ||
3475 | /* if the device failed it, it should be reported to upper layers */ | |
3476 | if (qc->err_mask & AC_ERR_DEV) | |
3477 | return 0; | |
3478 | ||
3479 | /* flush failed for some other reason, give it another shot */ | |
3480 | ata_tf_init(dev, &tf); | |
3481 | ||
3482 | tf.command = qc->tf.command; | |
3483 | tf.flags |= ATA_TFLAG_DEVICE; | |
3484 | tf.protocol = ATA_PROT_NODATA; | |
3485 | ||
a9a79dfe | 3486 | ata_dev_warn(dev, "retrying FLUSH 0x%x Emask 0x%x\n", |
6013efd8 TH |
3487 | tf.command, qc->err_mask); |
3488 | ||
3489 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
3490 | if (!err_mask) { | |
3491 | /* | |
3492 | * FLUSH is complete but there's no way to | |
3493 | * successfully complete a failed command from EH. | |
3494 | * Making sure retry is allowed at least once and | |
3495 | * retrying it should do the trick - whatever was in | |
3496 | * the cache is already on the platter and this won't | |
3497 | * cause infinite loop. | |
3498 | */ | |
3499 | qc->scsicmd->allowed = max(qc->scsicmd->allowed, 1); | |
3500 | } else { | |
a9a79dfe | 3501 | ata_dev_warn(dev, "FLUSH failed Emask 0x%x\n", |
6013efd8 TH |
3502 | err_mask); |
3503 | rc = -EIO; | |
3504 | ||
3505 | /* if device failed it, report it to upper layers */ | |
3506 | if (err_mask & AC_ERR_DEV) { | |
3507 | qc->err_mask |= AC_ERR_DEV; | |
3508 | qc->result_tf = tf; | |
3509 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
3510 | rc = 0; | |
3511 | } | |
3512 | } | |
3513 | return rc; | |
3514 | } | |
3515 | ||
6b7ae954 TH |
3516 | /** |
3517 | * ata_eh_set_lpm - configure SATA interface power management | |
3518 | * @link: link to configure power management | |
3519 | * @policy: the link power management policy | |
3520 | * @r_failed_dev: out parameter for failed device | |
3521 | * | |
3522 | * Enable SATA Interface power management. This will enable | |
3523 | * Device Interface Power Management (DIPM) for min_power | |
3524 | * policy, and then call driver specific callbacks for | |
3525 | * enabling Host Initiated Power management. | |
3526 | * | |
3527 | * LOCKING: | |
3528 | * EH context. | |
3529 | * | |
3530 | * RETURNS: | |
3531 | * 0 on success, -errno on failure. | |
3532 | */ | |
3533 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
3534 | struct ata_device **r_failed_dev) | |
3535 | { | |
6c8ea89c | 3536 | struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL; |
6b7ae954 TH |
3537 | struct ata_eh_context *ehc = &link->eh_context; |
3538 | struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; | |
e5005b15 | 3539 | enum ata_lpm_policy old_policy = link->lpm_policy; |
5f6f12cc | 3540 | bool no_dipm = link->ap->flags & ATA_FLAG_NO_DIPM; |
6b7ae954 TH |
3541 | unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; |
3542 | unsigned int err_mask; | |
3543 | int rc; | |
3544 | ||
3545 | /* if the link or host doesn't do LPM, noop */ | |
3546 | if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) | |
3547 | return 0; | |
3548 | ||
3549 | /* | |
3550 | * DIPM is enabled only for MIN_POWER as some devices | |
3551 | * misbehave when the host NACKs transition to SLUMBER. Order | |
3552 | * device and link configurations such that the host always | |
3553 | * allows DIPM requests. | |
3554 | */ | |
3555 | ata_for_each_dev(dev, link, ENABLED) { | |
3556 | bool hipm = ata_id_has_hipm(dev->id); | |
ae01b249 | 3557 | bool dipm = ata_id_has_dipm(dev->id) && !no_dipm; |
6b7ae954 TH |
3558 | |
3559 | /* find the first enabled and LPM enabled devices */ | |
3560 | if (!link_dev) | |
3561 | link_dev = dev; | |
3562 | ||
3563 | if (!lpm_dev && (hipm || dipm)) | |
3564 | lpm_dev = dev; | |
3565 | ||
3566 | hints &= ~ATA_LPM_EMPTY; | |
3567 | if (!hipm) | |
3568 | hints &= ~ATA_LPM_HIPM; | |
3569 | ||
3570 | /* disable DIPM before changing link config */ | |
3571 | if (policy != ATA_LPM_MIN_POWER && dipm) { | |
3572 | err_mask = ata_dev_set_feature(dev, | |
3573 | SETFEATURES_SATA_DISABLE, SATA_DIPM); | |
3574 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe JP |
3575 | ata_dev_warn(dev, |
3576 | "failed to disable DIPM, Emask 0x%x\n", | |
3577 | err_mask); | |
6b7ae954 TH |
3578 | rc = -EIO; |
3579 | goto fail; | |
3580 | } | |
3581 | } | |
3582 | } | |
3583 | ||
6c8ea89c TH |
3584 | if (ap) { |
3585 | rc = ap->ops->set_lpm(link, policy, hints); | |
3586 | if (!rc && ap->slave_link) | |
3587 | rc = ap->ops->set_lpm(ap->slave_link, policy, hints); | |
3588 | } else | |
3589 | rc = sata_pmp_set_lpm(link, policy, hints); | |
6b7ae954 TH |
3590 | |
3591 | /* | |
3592 | * Attribute link config failure to the first (LPM) enabled | |
3593 | * device on the link. | |
3594 | */ | |
3595 | if (rc) { | |
3596 | if (rc == -EOPNOTSUPP) { | |
3597 | link->flags |= ATA_LFLAG_NO_LPM; | |
3598 | return 0; | |
3599 | } | |
3600 | dev = lpm_dev ? lpm_dev : link_dev; | |
3601 | goto fail; | |
3602 | } | |
3603 | ||
e5005b15 TH |
3604 | /* |
3605 | * Low level driver acked the transition. Issue DIPM command | |
3606 | * with the new policy set. | |
3607 | */ | |
3608 | link->lpm_policy = policy; | |
3609 | if (ap && ap->slave_link) | |
3610 | ap->slave_link->lpm_policy = policy; | |
3611 | ||
6b7ae954 TH |
3612 | /* host config updated, enable DIPM if transitioning to MIN_POWER */ |
3613 | ata_for_each_dev(dev, link, ENABLED) { | |
ae01b249 TH |
3614 | if (policy == ATA_LPM_MIN_POWER && !no_dipm && |
3615 | ata_id_has_dipm(dev->id)) { | |
6b7ae954 TH |
3616 | err_mask = ata_dev_set_feature(dev, |
3617 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
3618 | if (err_mask && err_mask != AC_ERR_DEV) { | |
a9a79dfe | 3619 | ata_dev_warn(dev, |
6b7ae954 TH |
3620 | "failed to enable DIPM, Emask 0x%x\n", |
3621 | err_mask); | |
3622 | rc = -EIO; | |
3623 | goto fail; | |
3624 | } | |
3625 | } | |
3626 | } | |
3627 | ||
09c5b480 GM |
3628 | link->last_lpm_change = jiffies; |
3629 | link->flags |= ATA_LFLAG_CHANGED; | |
3630 | ||
6b7ae954 TH |
3631 | return 0; |
3632 | ||
3633 | fail: | |
e5005b15 TH |
3634 | /* restore the old policy */ |
3635 | link->lpm_policy = old_policy; | |
3636 | if (ap && ap->slave_link) | |
3637 | ap->slave_link->lpm_policy = old_policy; | |
3638 | ||
6b7ae954 TH |
3639 | /* if no device or only one more chance is left, disable LPM */ |
3640 | if (!dev || ehc->tries[dev->devno] <= 2) { | |
a9a79dfe | 3641 | ata_link_warn(link, "disabling LPM on the link\n"); |
6b7ae954 TH |
3642 | link->flags |= ATA_LFLAG_NO_LPM; |
3643 | } | |
3644 | if (r_failed_dev) | |
3645 | *r_failed_dev = dev; | |
3646 | return rc; | |
3647 | } | |
3648 | ||
8a745f1f | 3649 | int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 3650 | { |
f58229f8 TH |
3651 | struct ata_device *dev; |
3652 | int cnt = 0; | |
022bdb07 | 3653 | |
1eca4365 TH |
3654 | ata_for_each_dev(dev, link, ENABLED) |
3655 | cnt++; | |
022bdb07 TH |
3656 | return cnt; |
3657 | } | |
3658 | ||
0260731f | 3659 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 3660 | { |
f58229f8 TH |
3661 | struct ata_device *dev; |
3662 | int cnt = 0; | |
084fe639 | 3663 | |
1eca4365 | 3664 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 3665 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
3666 | cnt++; |
3667 | return cnt; | |
3668 | } | |
3669 | ||
0260731f | 3670 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 3671 | { |
672b2d65 | 3672 | struct ata_port *ap = link->ap; |
0260731f | 3673 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 3674 | struct ata_device *dev; |
084fe639 | 3675 | |
f9df58cb TH |
3676 | /* skip disabled links */ |
3677 | if (link->flags & ATA_LFLAG_DISABLED) | |
3678 | return 1; | |
3679 | ||
e2f3d75f TH |
3680 | /* skip if explicitly requested */ |
3681 | if (ehc->i.flags & ATA_EHI_NO_RECOVERY) | |
3682 | return 1; | |
3683 | ||
672b2d65 TH |
3684 | /* thaw frozen port and recover failed devices */ |
3685 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
3686 | return 0; | |
3687 | ||
3688 | /* reset at least once if reset is requested */ | |
3689 | if ((ehc->i.action & ATA_EH_RESET) && | |
3690 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
3691 | return 0; |
3692 | ||
3693 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 3694 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
3695 | if (dev->class == ATA_DEV_UNKNOWN && |
3696 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
3697 | return 0; | |
3698 | } | |
3699 | ||
3700 | return 1; | |
3701 | } | |
3702 | ||
c2c7a89c TH |
3703 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
3704 | { | |
3705 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
3706 | u64 now = get_jiffies_64(); | |
3707 | int *trials = void_arg; | |
3708 | ||
6868225e LM |
3709 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || |
3710 | (ent->timestamp < now - min(now, interval))) | |
c2c7a89c TH |
3711 | return -1; |
3712 | ||
3713 | (*trials)++; | |
3714 | return 0; | |
3715 | } | |
3716 | ||
02c05a27 TH |
3717 | static int ata_eh_schedule_probe(struct ata_device *dev) |
3718 | { | |
3719 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3720 | struct ata_link *link = ata_dev_phys_link(dev); |
3721 | int trials = 0; | |
02c05a27 TH |
3722 | |
3723 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3724 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3725 | return 0; | |
3726 | ||
3727 | ata_eh_detach_dev(dev); | |
3728 | ata_dev_init(dev); | |
3729 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3730 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3731 | ehc->saved_xfer_mode[dev->devno] = 0; |
3732 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3733 | |
6b7ae954 | 3734 | /* the link maybe in a deep sleep, wake it up */ |
6c8ea89c TH |
3735 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { |
3736 | if (ata_is_host_link(link)) | |
3737 | link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER, | |
3738 | ATA_LPM_EMPTY); | |
3739 | else | |
3740 | sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER, | |
3741 | ATA_LPM_EMPTY); | |
3742 | } | |
6b7ae954 | 3743 | |
c2c7a89c TH |
3744 | /* Record and count probe trials on the ering. The specific |
3745 | * error mask used is irrelevant. Because a successful device | |
3746 | * detection clears the ering, this count accumulates only if | |
3747 | * there are consecutive failed probes. | |
3748 | * | |
3749 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3750 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3751 | * forced to 1.5Gbps. | |
3752 | * | |
3753 | * This is to work around cases where failed link speed | |
3754 | * negotiation results in device misdetection leading to | |
3755 | * infinite DEVXCHG or PHRDY CHG events. | |
3756 | */ | |
3757 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3758 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3759 | ||
3760 | if (trials > ATA_EH_PROBE_TRIALS) | |
3761 | sata_down_spd_limit(link, 1); | |
3762 | ||
02c05a27 TH |
3763 | return 1; |
3764 | } | |
3765 | ||
9b1e2658 | 3766 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3767 | { |
9af5c9c9 | 3768 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3769 | |
cf9a590a TH |
3770 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3771 | * The requester is responsible for ensuring forward progress. | |
3772 | */ | |
3773 | if (err != -EAGAIN) | |
3774 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3775 | |
3776 | switch (err) { | |
3777 | case -ENODEV: | |
3778 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3779 | ehc->i.probe_mask |= (1 << dev->devno); | |
3780 | case -EINVAL: | |
3781 | /* give it just one more chance */ | |
3782 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
3783 | case -EIO: | |
d89293ab | 3784 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3785 | /* This is the last chance, better to slow |
3786 | * down than lose it. | |
3787 | */ | |
a07d499b | 3788 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3789 | if (dev->pio_mode > XFER_PIO_0) |
3790 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3791 | } |
3792 | } | |
3793 | ||
3794 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3795 | /* disable device if it has used up all its chances */ | |
3796 | ata_dev_disable(dev); | |
3797 | ||
3798 | /* detach if offline */ | |
b1c72916 | 3799 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3800 | ata_eh_detach_dev(dev); |
3801 | ||
02c05a27 | 3802 | /* schedule probe if necessary */ |
87fbc5a0 | 3803 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3804 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3805 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3806 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3807 | } | |
9b1e2658 TH |
3808 | |
3809 | return 1; | |
fee7ca72 | 3810 | } else { |
cf480626 | 3811 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3812 | return 0; |
fee7ca72 TH |
3813 | } |
3814 | } | |
3815 | ||
022bdb07 TH |
3816 | /** |
3817 | * ata_eh_recover - recover host port after error | |
3818 | * @ap: host port to recover | |
f5914a46 | 3819 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3820 | * @softreset: softreset method (can be NULL) |
3821 | * @hardreset: hardreset method (can be NULL) | |
3822 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3823 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3824 | * |
3825 | * This is the alpha and omega, eum and yang, heart and soul of | |
3826 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3827 | * recover each link and hotplug requests are recorded in the |
3828 | * link's eh_context. This function executes all the operations | |
3829 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3830 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3831 | * |
3832 | * LOCKING: | |
3833 | * Kernel thread context (may sleep). | |
3834 | * | |
3835 | * RETURNS: | |
3836 | * 0 on success, -errno on failure. | |
3837 | */ | |
fb7fd614 TH |
3838 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3839 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3840 | ata_postreset_fn_t postreset, | |
3841 | struct ata_link **r_failed_link) | |
022bdb07 | 3842 | { |
9b1e2658 | 3843 | struct ata_link *link; |
022bdb07 | 3844 | struct ata_device *dev; |
6b7ae954 | 3845 | int rc, nr_fails; |
45fabbb7 | 3846 | unsigned long flags, deadline; |
022bdb07 TH |
3847 | |
3848 | DPRINTK("ENTER\n"); | |
3849 | ||
3850 | /* prep for recovery */ | |
1eca4365 | 3851 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3852 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3853 | |
f9df58cb TH |
3854 | /* re-enable link? */ |
3855 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3856 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3857 | spin_lock_irqsave(ap->lock, flags); | |
3858 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3859 | spin_unlock_irqrestore(ap->lock, flags); | |
3860 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3861 | } | |
3862 | ||
1eca4365 | 3863 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3864 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3865 | ehc->tries[dev->devno] = 1; | |
3866 | else | |
3867 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3868 | |
9b1e2658 TH |
3869 | /* collect port action mask recorded in dev actions */ |
3870 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3871 | ~ATA_EH_PERDEV_MASK; | |
3872 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3873 | ||
3874 | /* process hotplug request */ | |
3875 | if (dev->flags & ATA_DFLAG_DETACH) | |
3876 | ata_eh_detach_dev(dev); | |
3877 | ||
02c05a27 TH |
3878 | /* schedule probe if necessary */ |
3879 | if (!ata_dev_enabled(dev)) | |
3880 | ata_eh_schedule_probe(dev); | |
084fe639 | 3881 | } |
022bdb07 TH |
3882 | } |
3883 | ||
3884 | retry: | |
022bdb07 TH |
3885 | rc = 0; |
3886 | ||
aeb2ecd6 | 3887 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3888 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3889 | goto out; |
3890 | ||
9b1e2658 | 3891 | /* prep for EH */ |
1eca4365 | 3892 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3893 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3894 | |
9b1e2658 TH |
3895 | /* skip EH if possible. */ |
3896 | if (ata_eh_skip_recovery(link)) | |
3897 | ehc->i.action = 0; | |
3898 | ||
1eca4365 | 3899 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3900 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3901 | } | |
084fe639 | 3902 | |
022bdb07 | 3903 | /* reset */ |
1eca4365 | 3904 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3905 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3906 | |
dc98c32c TH |
3907 | if (!(ehc->i.action & ATA_EH_RESET)) |
3908 | continue; | |
9b1e2658 | 3909 | |
dc98c32c TH |
3910 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3911 | prereset, softreset, hardreset, postreset); | |
3912 | if (rc) { | |
a9a79dfe | 3913 | ata_link_err(link, "reset failed, giving up\n"); |
dc98c32c | 3914 | goto out; |
022bdb07 | 3915 | } |
022bdb07 TH |
3916 | } |
3917 | ||
45fabbb7 EO |
3918 | do { |
3919 | unsigned long now; | |
3920 | ||
3921 | /* | |
3922 | * clears ATA_EH_PARK in eh_info and resets | |
3923 | * ap->park_req_pending | |
3924 | */ | |
3925 | ata_eh_pull_park_action(ap); | |
3926 | ||
3927 | deadline = jiffies; | |
1eca4365 TH |
3928 | ata_for_each_link(link, ap, EDGE) { |
3929 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3930 | struct ata_eh_context *ehc = &link->eh_context; |
3931 | unsigned long tmp; | |
3932 | ||
9162c657 HR |
3933 | if (dev->class != ATA_DEV_ATA && |
3934 | dev->class != ATA_DEV_ZAC) | |
45fabbb7 EO |
3935 | continue; |
3936 | if (!(ehc->i.dev_action[dev->devno] & | |
3937 | ATA_EH_PARK)) | |
3938 | continue; | |
3939 | tmp = dev->unpark_deadline; | |
3940 | if (time_before(deadline, tmp)) | |
3941 | deadline = tmp; | |
3942 | else if (time_before_eq(tmp, jiffies)) | |
3943 | continue; | |
3944 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3945 | continue; | |
3946 | ||
3947 | ata_eh_park_issue_cmd(dev, 1); | |
3948 | } | |
3949 | } | |
3950 | ||
3951 | now = jiffies; | |
3952 | if (time_before_eq(deadline, now)) | |
3953 | break; | |
3954 | ||
c0c362b6 | 3955 | ata_eh_release(ap); |
45fabbb7 EO |
3956 | deadline = wait_for_completion_timeout(&ap->park_req_pending, |
3957 | deadline - now); | |
c0c362b6 | 3958 | ata_eh_acquire(ap); |
45fabbb7 | 3959 | } while (deadline); |
1eca4365 TH |
3960 | ata_for_each_link(link, ap, EDGE) { |
3961 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3962 | if (!(link->eh_context.unloaded_mask & |
3963 | (1 << dev->devno))) | |
3964 | continue; | |
3965 | ||
3966 | ata_eh_park_issue_cmd(dev, 0); | |
3967 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3968 | } | |
3969 | } | |
3970 | ||
9b1e2658 | 3971 | /* the rest */ |
6b7ae954 TH |
3972 | nr_fails = 0; |
3973 | ata_for_each_link(link, ap, PMP_FIRST) { | |
9b1e2658 | 3974 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3975 | |
6b7ae954 TH |
3976 | if (sata_pmp_attached(ap) && ata_is_host_link(link)) |
3977 | goto config_lpm; | |
3978 | ||
9b1e2658 TH |
3979 | /* revalidate existing devices and attach new ones */ |
3980 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3981 | if (rc) |
6b7ae954 | 3982 | goto rest_fail; |
022bdb07 | 3983 | |
633273a3 TH |
3984 | /* if PMP got attached, return, pmp EH will take care of it */ |
3985 | if (link->device->class == ATA_DEV_PMP) { | |
3986 | ehc->i.action = 0; | |
3987 | return 0; | |
3988 | } | |
3989 | ||
9b1e2658 TH |
3990 | /* configure transfer mode if necessary */ |
3991 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3992 | rc = ata_set_mode(link, &dev); | |
3993 | if (rc) | |
6b7ae954 | 3994 | goto rest_fail; |
9b1e2658 TH |
3995 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
3996 | } | |
3997 | ||
11fc33da TH |
3998 | /* If reset has been issued, clear UA to avoid |
3999 | * disrupting the current users of the device. | |
4000 | */ | |
4001 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 4002 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
4003 | if (dev->class != ATA_DEV_ATAPI) |
4004 | continue; | |
4005 | rc = atapi_eh_clear_ua(dev); | |
4006 | if (rc) | |
6b7ae954 | 4007 | goto rest_fail; |
21334205 AL |
4008 | if (zpodd_dev_enabled(dev)) |
4009 | zpodd_post_poweron(dev); | |
11fc33da TH |
4010 | } |
4011 | } | |
4012 | ||
6013efd8 TH |
4013 | /* retry flush if necessary */ |
4014 | ata_for_each_dev(dev, link, ALL) { | |
9162c657 HR |
4015 | if (dev->class != ATA_DEV_ATA && |
4016 | dev->class != ATA_DEV_ZAC) | |
6013efd8 TH |
4017 | continue; |
4018 | rc = ata_eh_maybe_retry_flush(dev); | |
4019 | if (rc) | |
6b7ae954 | 4020 | goto rest_fail; |
6013efd8 TH |
4021 | } |
4022 | ||
6b7ae954 | 4023 | config_lpm: |
11fc33da | 4024 | /* configure link power saving */ |
6b7ae954 TH |
4025 | if (link->lpm_policy != ap->target_lpm_policy) { |
4026 | rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev); | |
4027 | if (rc) | |
4028 | goto rest_fail; | |
4029 | } | |
ca77329f | 4030 | |
9b1e2658 TH |
4031 | /* this link is okay now */ |
4032 | ehc->i.flags = 0; | |
4033 | continue; | |
022bdb07 | 4034 | |
6b7ae954 TH |
4035 | rest_fail: |
4036 | nr_fails++; | |
4037 | if (dev) | |
4038 | ata_eh_handle_dev_fail(dev, rc); | |
022bdb07 | 4039 | |
b06ce3e5 TH |
4040 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
4041 | /* PMP reset requires working host port. | |
4042 | * Can't retry if it's frozen. | |
4043 | */ | |
071f44b1 | 4044 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 4045 | goto out; |
9b1e2658 | 4046 | break; |
b06ce3e5 | 4047 | } |
022bdb07 TH |
4048 | } |
4049 | ||
6b7ae954 | 4050 | if (nr_fails) |
9b1e2658 | 4051 | goto retry; |
022bdb07 | 4052 | |
9b1e2658 TH |
4053 | out: |
4054 | if (rc && r_failed_link) | |
4055 | *r_failed_link = link; | |
4056 | ||
022bdb07 TH |
4057 | DPRINTK("EXIT, rc=%d\n", rc); |
4058 | return rc; | |
4059 | } | |
4060 | ||
4061 | /** | |
4062 | * ata_eh_finish - finish up EH | |
4063 | * @ap: host port to finish EH for | |
4064 | * | |
4065 | * Recovery is complete. Clean up EH states and retry or finish | |
4066 | * failed qcs. | |
4067 | * | |
4068 | * LOCKING: | |
4069 | * None. | |
4070 | */ | |
fb7fd614 | 4071 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
4072 | { |
4073 | int tag; | |
4074 | ||
4075 | /* retry or finish qcs */ | |
4076 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
4077 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
4078 | ||
4079 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
4080 | continue; | |
4081 | ||
4082 | if (qc->err_mask) { | |
4083 | /* FIXME: Once EH migration is complete, | |
4084 | * generate sense data in this function, | |
4085 | * considering both err_mask and tf. | |
4086 | */ | |
03faab78 | 4087 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 4088 | ata_eh_qc_retry(qc); |
03faab78 TH |
4089 | else |
4090 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
4091 | } else { |
4092 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
4093 | ata_eh_qc_complete(qc); | |
4094 | } else { | |
4095 | /* feed zero TF to sense generation */ | |
4096 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
4097 | ata_eh_qc_retry(qc); | |
4098 | } | |
4099 | } | |
4100 | } | |
da917d69 TH |
4101 | |
4102 | /* make sure nr_active_links is zero after EH */ | |
4103 | WARN_ON(ap->nr_active_links); | |
4104 | ap->nr_active_links = 0; | |
022bdb07 TH |
4105 | } |
4106 | ||
4107 | /** | |
4108 | * ata_do_eh - do standard error handling | |
4109 | * @ap: host port to handle error for | |
a1efdaba | 4110 | * |
f5914a46 | 4111 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
4112 | * @softreset: softreset method (can be NULL) |
4113 | * @hardreset: hardreset method (can be NULL) | |
4114 | * @postreset: postreset method (can be NULL) | |
4115 | * | |
4116 | * Perform standard error handling sequence. | |
4117 | * | |
4118 | * LOCKING: | |
4119 | * Kernel thread context (may sleep). | |
4120 | */ | |
f5914a46 TH |
4121 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
4122 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
4123 | ata_postreset_fn_t postreset) | |
022bdb07 | 4124 | { |
9b1e2658 TH |
4125 | struct ata_device *dev; |
4126 | int rc; | |
4127 | ||
4128 | ata_eh_autopsy(ap); | |
4129 | ata_eh_report(ap); | |
4130 | ||
4131 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
4132 | NULL); | |
4133 | if (rc) { | |
1eca4365 | 4134 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
4135 | ata_dev_disable(dev); |
4136 | } | |
4137 | ||
022bdb07 TH |
4138 | ata_eh_finish(ap); |
4139 | } | |
500530f6 | 4140 | |
a1efdaba TH |
4141 | /** |
4142 | * ata_std_error_handler - standard error handler | |
4143 | * @ap: host port to handle error for | |
4144 | * | |
4145 | * Standard error handler | |
4146 | * | |
4147 | * LOCKING: | |
4148 | * Kernel thread context (may sleep). | |
4149 | */ | |
4150 | void ata_std_error_handler(struct ata_port *ap) | |
4151 | { | |
4152 | struct ata_port_operations *ops = ap->ops; | |
4153 | ata_reset_fn_t hardreset = ops->hardreset; | |
4154 | ||
57c9efdf | 4155 | /* ignore built-in hardreset if SCR access is not available */ |
fe06e5f9 | 4156 | if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) |
a1efdaba TH |
4157 | hardreset = NULL; |
4158 | ||
4159 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
4160 | } | |
4161 | ||
6ffa01d8 | 4162 | #ifdef CONFIG_PM |
500530f6 TH |
4163 | /** |
4164 | * ata_eh_handle_port_suspend - perform port suspend operation | |
4165 | * @ap: port to suspend | |
4166 | * | |
4167 | * Suspend @ap. | |
4168 | * | |
4169 | * LOCKING: | |
4170 | * Kernel thread context (may sleep). | |
4171 | */ | |
4172 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
4173 | { | |
4174 | unsigned long flags; | |
4175 | int rc = 0; | |
3dc67440 | 4176 | struct ata_device *dev; |
500530f6 TH |
4177 | |
4178 | /* are we suspending? */ | |
4179 | spin_lock_irqsave(ap->lock, flags); | |
4180 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 4181 | ap->pm_mesg.event & PM_EVENT_RESUME) { |
500530f6 TH |
4182 | spin_unlock_irqrestore(ap->lock, flags); |
4183 | return; | |
4184 | } | |
4185 | spin_unlock_irqrestore(ap->lock, flags); | |
4186 | ||
4187 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
4188 | ||
3dc67440 AL |
4189 | /* |
4190 | * If we have a ZPODD attached, check its zero | |
4191 | * power ready status before the port is frozen. | |
a7ff60db | 4192 | * Only needed for runtime suspend. |
3dc67440 | 4193 | */ |
a7ff60db AL |
4194 | if (PMSG_IS_AUTO(ap->pm_mesg)) { |
4195 | ata_for_each_dev(dev, &ap->link, ENABLED) { | |
4196 | if (zpodd_dev_enabled(dev)) | |
4197 | zpodd_on_suspend(dev); | |
4198 | } | |
3dc67440 AL |
4199 | } |
4200 | ||
64578a3d TH |
4201 | /* tell ACPI we're suspending */ |
4202 | rc = ata_acpi_on_suspend(ap); | |
4203 | if (rc) | |
4204 | goto out; | |
4205 | ||
500530f6 TH |
4206 | /* suspend */ |
4207 | ata_eh_freeze_port(ap); | |
4208 | ||
4209 | if (ap->ops->port_suspend) | |
4210 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
4211 | ||
a7ff60db | 4212 | ata_acpi_set_state(ap, ap->pm_mesg); |
64578a3d | 4213 | out: |
bc6e7c4b | 4214 | /* update the flags */ |
500530f6 TH |
4215 | spin_lock_irqsave(ap->lock, flags); |
4216 | ||
4217 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
4218 | if (rc == 0) | |
4219 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 4220 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
4221 | ata_port_schedule_eh(ap); |
4222 | ||
500530f6 TH |
4223 | spin_unlock_irqrestore(ap->lock, flags); |
4224 | ||
4225 | return; | |
4226 | } | |
4227 | ||
4228 | /** | |
4229 | * ata_eh_handle_port_resume - perform port resume operation | |
4230 | * @ap: port to resume | |
4231 | * | |
4232 | * Resume @ap. | |
4233 | * | |
500530f6 TH |
4234 | * LOCKING: |
4235 | * Kernel thread context (may sleep). | |
4236 | */ | |
4237 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
4238 | { | |
6f9c1ea2 TH |
4239 | struct ata_link *link; |
4240 | struct ata_device *dev; | |
500530f6 | 4241 | unsigned long flags; |
9666f400 | 4242 | int rc = 0; |
500530f6 TH |
4243 | |
4244 | /* are we resuming? */ | |
4245 | spin_lock_irqsave(ap->lock, flags); | |
4246 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
a7ff60db | 4247 | !(ap->pm_mesg.event & PM_EVENT_RESUME)) { |
500530f6 TH |
4248 | spin_unlock_irqrestore(ap->lock, flags); |
4249 | return; | |
4250 | } | |
4251 | spin_unlock_irqrestore(ap->lock, flags); | |
4252 | ||
9666f400 | 4253 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 4254 | |
6f9c1ea2 TH |
4255 | /* |
4256 | * Error timestamps are in jiffies which doesn't run while | |
4257 | * suspended and PHY events during resume isn't too uncommon. | |
4258 | * When the two are combined, it can lead to unnecessary speed | |
4259 | * downs if the machine is suspended and resumed repeatedly. | |
4260 | * Clear error history. | |
4261 | */ | |
4262 | ata_for_each_link(link, ap, HOST_FIRST) | |
4263 | ata_for_each_dev(dev, link, ALL) | |
4264 | ata_ering_clear(&dev->ering); | |
4265 | ||
a7ff60db | 4266 | ata_acpi_set_state(ap, ap->pm_mesg); |
bd3adca5 | 4267 | |
500530f6 TH |
4268 | if (ap->ops->port_resume) |
4269 | rc = ap->ops->port_resume(ap); | |
4270 | ||
6746544c TH |
4271 | /* tell ACPI that we're resuming */ |
4272 | ata_acpi_on_resume(ap); | |
4273 | ||
bc6e7c4b | 4274 | /* update the flags */ |
500530f6 TH |
4275 | spin_lock_irqsave(ap->lock, flags); |
4276 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
500530f6 TH |
4277 | spin_unlock_irqrestore(ap->lock, flags); |
4278 | } | |
6ffa01d8 | 4279 | #endif /* CONFIG_PM */ |