Commit | Line | Data |
---|---|---|
ece1d636 TH |
1 | /* |
2 | * libata-eh.c - libata error handling | |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
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> |
2855568b | 37 | #include <linux/pci.h> |
ece1d636 TH |
38 | #include <scsi/scsi.h> |
39 | #include <scsi/scsi_host.h> | |
40 | #include <scsi/scsi_eh.h> | |
41 | #include <scsi/scsi_device.h> | |
42 | #include <scsi/scsi_cmnd.h> | |
6521148c | 43 | #include <scsi/scsi_dbg.h> |
c6fd2807 | 44 | #include "../scsi/scsi_transport_api.h" |
ece1d636 TH |
45 | |
46 | #include <linux/libata.h> | |
47 | ||
48 | #include "libata.h" | |
49 | ||
7d47e8d4 | 50 | enum { |
3884f7b0 | 51 | /* speed down verdicts */ |
7d47e8d4 TH |
52 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
53 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
54 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 55 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
56 | |
57 | /* error flags */ | |
58 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 59 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
d9027470 | 60 | ATA_EFLAG_OLD_ER = (1 << 31), |
3884f7b0 TH |
61 | |
62 | /* error categories */ | |
63 | ATA_ECAT_NONE = 0, | |
64 | ATA_ECAT_ATA_BUS = 1, | |
65 | ATA_ECAT_TOUT_HSM = 2, | |
66 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
67 | ATA_ECAT_DUBIOUS_NONE = 4, |
68 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
69 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
70 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
71 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 72 | |
87fbc5a0 TH |
73 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
74 | ||
0a2c0f56 TH |
75 | /* always put at least this amount of time between resets */ |
76 | ATA_EH_RESET_COOL_DOWN = 5000, | |
77 | ||
341c2c95 TH |
78 | /* Waiting in ->prereset can never be reliable. It's |
79 | * sometimes nice to wait there but it can't be depended upon; | |
80 | * otherwise, we wouldn't be resetting. Just give it enough | |
81 | * time for most drives to spin up. | |
82 | */ | |
83 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
84 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
85 | |
86 | ATA_EH_UA_TRIES = 5, | |
c2c7a89c TH |
87 | |
88 | /* probe speed down parameters, see ata_eh_schedule_probe() */ | |
89 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ | |
90 | ATA_EH_PROBE_TRIALS = 2, | |
31daabda TH |
91 | }; |
92 | ||
93 | /* The following table determines how we sequence resets. Each entry | |
94 | * represents timeout for that try. The first try can be soft or | |
95 | * hardreset. All others are hardreset if available. In most cases | |
96 | * the first reset w/ 10sec timeout should succeed. Following entries | |
97 | * are mostly for error handling, hotplug and retarded devices. | |
98 | */ | |
99 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
100 | 10000, /* most drives spin up by 10sec */ |
101 | 10000, /* > 99% working drives spin up before 20sec */ | |
102 | 35000, /* give > 30 secs of idleness for retarded devices */ | |
103 | 5000, /* and sweet one last chance */ | |
d8af0eb6 | 104 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
105 | }; |
106 | ||
87fbc5a0 TH |
107 | static const unsigned long ata_eh_identify_timeouts[] = { |
108 | 5000, /* covers > 99% of successes and not too boring on failures */ | |
109 | 10000, /* combined time till here is enough even for media access */ | |
110 | 30000, /* for true idiots */ | |
111 | ULONG_MAX, | |
112 | }; | |
113 | ||
6013efd8 TH |
114 | static const unsigned long ata_eh_flush_timeouts[] = { |
115 | 15000, /* be generous with flush */ | |
116 | 15000, /* ditto */ | |
117 | 30000, /* and even more generous */ | |
118 | ULONG_MAX, | |
119 | }; | |
120 | ||
87fbc5a0 TH |
121 | static const unsigned long ata_eh_other_timeouts[] = { |
122 | 5000, /* same rationale as identify timeout */ | |
123 | 10000, /* ditto */ | |
124 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
125 | ULONG_MAX, | |
126 | }; | |
127 | ||
128 | struct ata_eh_cmd_timeout_ent { | |
129 | const u8 *commands; | |
130 | const unsigned long *timeouts; | |
131 | }; | |
132 | ||
133 | /* The following table determines timeouts to use for EH internal | |
134 | * commands. Each table entry is a command class and matches the | |
135 | * commands the entry applies to and the timeout table to use. | |
136 | * | |
137 | * On the retry after a command timed out, the next timeout value from | |
138 | * the table is used. If the table doesn't contain further entries, | |
139 | * the last value is used. | |
140 | * | |
141 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
142 | * command class, so if SET_FEATURES times out on the first try, the | |
143 | * next try will use the second timeout value only for that class. | |
144 | */ | |
145 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
146 | static const struct ata_eh_cmd_timeout_ent | |
147 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
148 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
149 | .timeouts = ata_eh_identify_timeouts, }, | |
150 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), | |
151 | .timeouts = ata_eh_other_timeouts, }, | |
152 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
153 | .timeouts = ata_eh_other_timeouts, }, | |
154 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
155 | .timeouts = ata_eh_other_timeouts, }, | |
156 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
157 | .timeouts = ata_eh_other_timeouts, }, | |
6013efd8 TH |
158 | { .commands = CMDS(ATA_CMD_FLUSH, ATA_CMD_FLUSH_EXT), |
159 | .timeouts = ata_eh_flush_timeouts }, | |
87fbc5a0 TH |
160 | }; |
161 | #undef CMDS | |
162 | ||
ad9e2762 | 163 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 164 | #ifdef CONFIG_PM |
500530f6 TH |
165 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
166 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
167 | #else /* CONFIG_PM */ |
168 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
169 | { } | |
170 | ||
171 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
172 | { } | |
6ffa01d8 | 173 | #endif /* CONFIG_PM */ |
ad9e2762 | 174 | |
b64bbc39 TH |
175 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
176 | va_list args) | |
177 | { | |
178 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
179 | ATA_EH_DESC_LEN - ehi->desc_len, | |
180 | fmt, args); | |
181 | } | |
182 | ||
183 | /** | |
184 | * __ata_ehi_push_desc - push error description without adding separator | |
185 | * @ehi: target EHI | |
186 | * @fmt: printf format string | |
187 | * | |
188 | * Format string according to @fmt and append it to @ehi->desc. | |
189 | * | |
190 | * LOCKING: | |
191 | * spin_lock_irqsave(host lock) | |
192 | */ | |
193 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
194 | { | |
195 | va_list args; | |
196 | ||
197 | va_start(args, fmt); | |
198 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
199 | va_end(args); | |
200 | } | |
201 | ||
202 | /** | |
203 | * ata_ehi_push_desc - push error description with separator | |
204 | * @ehi: target EHI | |
205 | * @fmt: printf format string | |
206 | * | |
207 | * Format string according to @fmt and append it to @ehi->desc. | |
208 | * If @ehi->desc is not empty, ", " is added in-between. | |
209 | * | |
210 | * LOCKING: | |
211 | * spin_lock_irqsave(host lock) | |
212 | */ | |
213 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
214 | { | |
215 | va_list args; | |
216 | ||
217 | if (ehi->desc_len) | |
218 | __ata_ehi_push_desc(ehi, ", "); | |
219 | ||
220 | va_start(args, fmt); | |
221 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
222 | va_end(args); | |
223 | } | |
224 | ||
225 | /** | |
226 | * ata_ehi_clear_desc - clean error description | |
227 | * @ehi: target EHI | |
228 | * | |
229 | * Clear @ehi->desc. | |
230 | * | |
231 | * LOCKING: | |
232 | * spin_lock_irqsave(host lock) | |
233 | */ | |
234 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
235 | { | |
236 | ehi->desc[0] = '\0'; | |
237 | ehi->desc_len = 0; | |
238 | } | |
239 | ||
cbcdd875 TH |
240 | /** |
241 | * ata_port_desc - append port description | |
242 | * @ap: target ATA port | |
243 | * @fmt: printf format string | |
244 | * | |
245 | * Format string according to @fmt and append it to port | |
246 | * description. If port description is not empty, " " is added | |
247 | * in-between. This function is to be used while initializing | |
248 | * ata_host. The description is printed on host registration. | |
249 | * | |
250 | * LOCKING: | |
251 | * None. | |
252 | */ | |
253 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
254 | { | |
255 | va_list args; | |
256 | ||
257 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
258 | ||
259 | if (ap->link.eh_info.desc_len) | |
260 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
261 | ||
262 | va_start(args, fmt); | |
263 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
264 | va_end(args); | |
265 | } | |
266 | ||
267 | #ifdef CONFIG_PCI | |
268 | ||
269 | /** | |
270 | * ata_port_pbar_desc - append PCI BAR description | |
271 | * @ap: target ATA port | |
272 | * @bar: target PCI BAR | |
273 | * @offset: offset into PCI BAR | |
274 | * @name: name of the area | |
275 | * | |
276 | * If @offset is negative, this function formats a string which | |
277 | * contains the name, address, size and type of the BAR and | |
278 | * appends it to the port description. If @offset is zero or | |
279 | * positive, only name and offsetted address is appended. | |
280 | * | |
281 | * LOCKING: | |
282 | * None. | |
283 | */ | |
284 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
285 | const char *name) | |
286 | { | |
287 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
288 | char *type = ""; | |
289 | unsigned long long start, len; | |
290 | ||
291 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
292 | type = "m"; | |
293 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
294 | type = "i"; | |
295 | ||
296 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
297 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
298 | ||
299 | if (offset < 0) | |
300 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
301 | else | |
e6a73ab1 AM |
302 | ata_port_desc(ap, "%s 0x%llx", name, |
303 | start + (unsigned long long)offset); | |
cbcdd875 TH |
304 | } |
305 | ||
306 | #endif /* CONFIG_PCI */ | |
307 | ||
87fbc5a0 TH |
308 | static int ata_lookup_timeout_table(u8 cmd) |
309 | { | |
310 | int i; | |
311 | ||
312 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
313 | const u8 *cur; | |
314 | ||
315 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
316 | if (*cur == cmd) | |
317 | return i; | |
318 | } | |
319 | ||
320 | return -1; | |
321 | } | |
322 | ||
323 | /** | |
324 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
325 | * @dev: target device | |
326 | * @cmd: internal command to be issued | |
327 | * | |
328 | * Determine timeout for internal command @cmd for @dev. | |
329 | * | |
330 | * LOCKING: | |
331 | * EH context. | |
332 | * | |
333 | * RETURNS: | |
334 | * Determined timeout. | |
335 | */ | |
336 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) | |
337 | { | |
338 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
339 | int ent = ata_lookup_timeout_table(cmd); | |
340 | int idx; | |
341 | ||
342 | if (ent < 0) | |
343 | return ATA_EH_CMD_DFL_TIMEOUT; | |
344 | ||
345 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
346 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
347 | } | |
348 | ||
349 | /** | |
350 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
351 | * @dev: target device | |
352 | * @cmd: internal command which timed out | |
353 | * | |
354 | * Notify EH that internal command @cmd for @dev timed out. This | |
355 | * function should be called only for commands whose timeouts are | |
356 | * determined using ata_internal_cmd_timeout(). | |
357 | * | |
358 | * LOCKING: | |
359 | * EH context. | |
360 | */ | |
361 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
362 | { | |
363 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
364 | int ent = ata_lookup_timeout_table(cmd); | |
365 | int idx; | |
366 | ||
367 | if (ent < 0) | |
368 | return; | |
369 | ||
370 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
371 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) | |
372 | ehc->cmd_timeout_idx[dev->devno][ent]++; | |
373 | } | |
374 | ||
3884f7b0 | 375 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
376 | unsigned int err_mask) |
377 | { | |
378 | struct ata_ering_entry *ent; | |
379 | ||
380 | WARN_ON(!err_mask); | |
381 | ||
382 | ering->cursor++; | |
383 | ering->cursor %= ATA_ERING_SIZE; | |
384 | ||
385 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 386 | ent->eflags = eflags; |
0c247c55 TH |
387 | ent->err_mask = err_mask; |
388 | ent->timestamp = get_jiffies_64(); | |
389 | } | |
390 | ||
76326ac1 TH |
391 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
392 | { | |
393 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
394 | ||
395 | if (ent->err_mask) | |
396 | return ent; | |
397 | return NULL; | |
398 | } | |
399 | ||
d9027470 GG |
400 | int ata_ering_map(struct ata_ering *ering, |
401 | int (*map_fn)(struct ata_ering_entry *, void *), | |
402 | void *arg) | |
0c247c55 TH |
403 | { |
404 | int idx, rc = 0; | |
405 | struct ata_ering_entry *ent; | |
406 | ||
407 | idx = ering->cursor; | |
408 | do { | |
409 | ent = &ering->ring[idx]; | |
410 | if (!ent->err_mask) | |
411 | break; | |
412 | rc = map_fn(ent, arg); | |
413 | if (rc) | |
414 | break; | |
415 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
416 | } while (idx != ering->cursor); | |
417 | ||
418 | return rc; | |
419 | } | |
420 | ||
d9027470 GG |
421 | int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg) |
422 | { | |
423 | ent->eflags |= ATA_EFLAG_OLD_ER; | |
424 | return 0; | |
425 | } | |
426 | ||
427 | static void ata_ering_clear(struct ata_ering *ering) | |
428 | { | |
429 | ata_ering_map(ering, ata_ering_clear_cb, NULL); | |
430 | } | |
431 | ||
64f65ca6 TH |
432 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
433 | { | |
9af5c9c9 | 434 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
435 | |
436 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
437 | } | |
438 | ||
f58229f8 | 439 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
440 | struct ata_eh_info *ehi, unsigned int action) |
441 | { | |
f58229f8 | 442 | struct ata_device *tdev; |
af181c2d TH |
443 | |
444 | if (!dev) { | |
445 | ehi->action &= ~action; | |
1eca4365 | 446 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 447 | ehi->dev_action[tdev->devno] &= ~action; |
af181c2d TH |
448 | } else { |
449 | /* doesn't make sense for port-wide EH actions */ | |
450 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
451 | ||
452 | /* break ehi->action into ehi->dev_action */ | |
453 | if (ehi->action & action) { | |
1eca4365 | 454 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
455 | ehi->dev_action[tdev->devno] |= |
456 | ehi->action & action; | |
af181c2d TH |
457 | ehi->action &= ~action; |
458 | } | |
459 | ||
460 | /* turn off the specified per-dev action */ | |
461 | ehi->dev_action[dev->devno] &= ~action; | |
462 | } | |
463 | } | |
464 | ||
ece1d636 TH |
465 | /** |
466 | * ata_scsi_timed_out - SCSI layer time out callback | |
467 | * @cmd: timed out SCSI command | |
468 | * | |
469 | * Handles SCSI layer timeout. We race with normal completion of | |
470 | * the qc for @cmd. If the qc is already gone, we lose and let | |
471 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has | |
472 | * timed out and EH should be invoked. Prevent ata_qc_complete() | |
473 | * from finishing it by setting EH_SCHEDULED and return | |
474 | * EH_NOT_HANDLED. | |
475 | * | |
ad9e2762 TH |
476 | * TODO: kill this function once old EH is gone. |
477 | * | |
ece1d636 TH |
478 | * LOCKING: |
479 | * Called from timer context | |
480 | * | |
481 | * RETURNS: | |
482 | * EH_HANDLED or EH_NOT_HANDLED | |
483 | */ | |
242f9dcb | 484 | enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) |
ece1d636 TH |
485 | { |
486 | struct Scsi_Host *host = cmd->device->host; | |
35bb94b1 | 487 | struct ata_port *ap = ata_shost_to_port(host); |
ece1d636 TH |
488 | unsigned long flags; |
489 | struct ata_queued_cmd *qc; | |
242f9dcb | 490 | enum blk_eh_timer_return ret; |
ece1d636 TH |
491 | |
492 | DPRINTK("ENTER\n"); | |
493 | ||
ad9e2762 | 494 | if (ap->ops->error_handler) { |
242f9dcb | 495 | ret = BLK_EH_NOT_HANDLED; |
ad9e2762 TH |
496 | goto out; |
497 | } | |
498 | ||
242f9dcb | 499 | ret = BLK_EH_HANDLED; |
ba6a1308 | 500 | spin_lock_irqsave(ap->lock, flags); |
9af5c9c9 | 501 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
ece1d636 TH |
502 | if (qc) { |
503 | WARN_ON(qc->scsicmd != cmd); | |
504 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; | |
505 | qc->err_mask |= AC_ERR_TIMEOUT; | |
242f9dcb | 506 | ret = BLK_EH_NOT_HANDLED; |
ece1d636 | 507 | } |
ba6a1308 | 508 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 509 | |
ad9e2762 | 510 | out: |
ece1d636 TH |
511 | DPRINTK("EXIT, ret=%d\n", ret); |
512 | return ret; | |
513 | } | |
514 | ||
ece180d1 TH |
515 | static void ata_eh_unload(struct ata_port *ap) |
516 | { | |
517 | struct ata_link *link; | |
518 | struct ata_device *dev; | |
519 | unsigned long flags; | |
520 | ||
521 | /* Restore SControl IPM and SPD for the next driver and | |
522 | * disable attached devices. | |
523 | */ | |
524 | ata_for_each_link(link, ap, PMP_FIRST) { | |
525 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
526 | ata_for_each_dev(dev, link, ALL) | |
527 | ata_dev_disable(dev); | |
528 | } | |
529 | ||
530 | /* freeze and set UNLOADED */ | |
531 | spin_lock_irqsave(ap->lock, flags); | |
532 | ||
533 | ata_port_freeze(ap); /* won't be thawed */ | |
534 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
535 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
536 | ||
537 | spin_unlock_irqrestore(ap->lock, flags); | |
538 | } | |
539 | ||
ece1d636 TH |
540 | /** |
541 | * ata_scsi_error - SCSI layer error handler callback | |
542 | * @host: SCSI host on which error occurred | |
543 | * | |
544 | * Handles SCSI-layer-thrown error events. | |
545 | * | |
546 | * LOCKING: | |
547 | * Inherited from SCSI layer (none, can sleep) | |
548 | * | |
549 | * RETURNS: | |
550 | * Zero. | |
551 | */ | |
381544bb | 552 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 553 | { |
35bb94b1 | 554 | struct ata_port *ap = ata_shost_to_port(host); |
a1e10f7e | 555 | int i; |
ad9e2762 | 556 | unsigned long flags; |
ece1d636 TH |
557 | |
558 | DPRINTK("ENTER\n"); | |
559 | ||
c429137a TH |
560 | /* make sure sff pio task is not running */ |
561 | ata_sff_flush_pio_task(ap); | |
ece1d636 | 562 | |
cca3974e | 563 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
564 | |
565 | /* For new EH, all qcs are finished in one of three ways - | |
566 | * normal completion, error completion, and SCSI timeout. | |
c96f1732 | 567 | * Both completions can race against SCSI timeout. When normal |
ad9e2762 TH |
568 | * completion wins, the qc never reaches EH. When error |
569 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
570 | * | |
571 | * When SCSI timeout wins, things are a bit more complex. | |
572 | * Normal or error completion can occur after the timeout but | |
573 | * before this point. In such cases, both types of | |
574 | * completions are honored. A scmd is determined to have | |
575 | * timed out iff its associated qc is active and not failed. | |
576 | */ | |
577 | if (ap->ops->error_handler) { | |
578 | struct scsi_cmnd *scmd, *tmp; | |
579 | int nr_timedout = 0; | |
580 | ||
e30349d2 | 581 | spin_lock_irqsave(ap->lock, flags); |
d9027470 | 582 | |
c96f1732 AC |
583 | /* This must occur under the ap->lock as we don't want |
584 | a polled recovery to race the real interrupt handler | |
d9027470 | 585 | |
c96f1732 AC |
586 | The lost_interrupt handler checks for any completed but |
587 | non-notified command and completes much like an IRQ handler. | |
d9027470 | 588 | |
c96f1732 AC |
589 | We then fall into the error recovery code which will treat |
590 | this as if normal completion won the race */ | |
591 | ||
592 | if (ap->ops->lost_interrupt) | |
593 | ap->ops->lost_interrupt(ap); | |
d9027470 | 594 | |
ad9e2762 TH |
595 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { |
596 | struct ata_queued_cmd *qc; | |
597 | ||
598 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
599 | qc = __ata_qc_from_tag(ap, i); | |
600 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
601 | qc->scsicmd == scmd) | |
602 | break; | |
603 | } | |
604 | ||
605 | if (i < ATA_MAX_QUEUE) { | |
606 | /* the scmd has an associated qc */ | |
607 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
608 | /* which hasn't failed yet, timeout */ | |
609 | qc->err_mask |= AC_ERR_TIMEOUT; | |
610 | qc->flags |= ATA_QCFLAG_FAILED; | |
611 | nr_timedout++; | |
612 | } | |
613 | } else { | |
614 | /* Normal completion occurred after | |
615 | * SCSI timeout but before this point. | |
616 | * Successfully complete it. | |
617 | */ | |
618 | scmd->retries = scmd->allowed; | |
619 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
620 | } | |
621 | } | |
622 | ||
623 | /* If we have timed out qcs. They belong to EH from | |
624 | * this point but the state of the controller is | |
625 | * unknown. Freeze the port to make sure the IRQ | |
626 | * handler doesn't diddle with those qcs. This must | |
627 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
628 | */ | |
629 | if (nr_timedout) | |
630 | __ata_port_freeze(ap); | |
631 | ||
e30349d2 | 632 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
633 | |
634 | /* initialize eh_tries */ | |
635 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 636 | } else |
e30349d2 | 637 | spin_unlock_wait(ap->lock); |
d9027470 | 638 | |
c96f1732 AC |
639 | /* If we timed raced normal completion and there is nothing to |
640 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ | |
ad9e2762 TH |
641 | |
642 | repeat: | |
643 | /* invoke error handler */ | |
644 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
645 | struct ata_link *link; |
646 | ||
5ddf24c5 TH |
647 | /* kill fast drain timer */ |
648 | del_timer_sync(&ap->fastdrain_timer); | |
649 | ||
500530f6 TH |
650 | /* process port resume request */ |
651 | ata_eh_handle_port_resume(ap); | |
652 | ||
f3e81b19 | 653 | /* fetch & clear EH info */ |
e30349d2 | 654 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 655 | |
1eca4365 | 656 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
657 | struct ata_eh_context *ehc = &link->eh_context; |
658 | struct ata_device *dev; | |
659 | ||
cf1b86c8 TH |
660 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
661 | link->eh_context.i = link->eh_info; | |
662 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 663 | |
1eca4365 | 664 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
665 | int devno = dev->devno; |
666 | ||
667 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
668 | if (ata_ncq_enabled(dev)) | |
669 | ehc->saved_ncq_enabled |= 1 << devno; | |
670 | } | |
cf1b86c8 | 671 | } |
f3e81b19 | 672 | |
b51e9e5d TH |
673 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
674 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 675 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 676 | |
e30349d2 | 677 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 678 | |
500530f6 TH |
679 | /* invoke EH, skip if unloading or suspended */ |
680 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 681 | ap->ops->error_handler(ap); |
ece180d1 TH |
682 | else { |
683 | /* if unloading, commence suicide */ | |
684 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
685 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
686 | ata_eh_unload(ap); | |
720ba126 | 687 | ata_eh_finish(ap); |
ece180d1 | 688 | } |
ad9e2762 | 689 | |
500530f6 TH |
690 | /* process port suspend request */ |
691 | ata_eh_handle_port_suspend(ap); | |
692 | ||
ad9e2762 TH |
693 | /* Exception might have happend after ->error_handler |
694 | * recovered the port but before this point. Repeat | |
695 | * EH in such case. | |
696 | */ | |
e30349d2 | 697 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 698 | |
b51e9e5d | 699 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 700 | if (--ap->eh_tries) { |
e30349d2 | 701 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
702 | goto repeat; |
703 | } | |
704 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " | |
a1e10f7e | 705 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
914616a3 | 706 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
707 | } |
708 | ||
f3e81b19 | 709 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 710 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 711 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 712 | |
e30349d2 | 713 | /* Clear host_eh_scheduled while holding ap->lock such |
ad9e2762 TH |
714 | * that if exception occurs after this point but |
715 | * before EH completion, SCSI midlayer will | |
716 | * re-initiate EH. | |
717 | */ | |
718 | host->host_eh_scheduled = 0; | |
719 | ||
e30349d2 | 720 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 721 | } else { |
9af5c9c9 | 722 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
723 | ap->ops->eng_timeout(ap); |
724 | } | |
ece1d636 | 725 | |
ad9e2762 | 726 | /* finish or retry handled scmd's and clean up */ |
ece1d636 TH |
727 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
728 | ||
729 | scsi_eh_flush_done_q(&ap->eh_done_q); | |
730 | ||
ad9e2762 | 731 | /* clean up */ |
e30349d2 | 732 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 733 | |
1cdaf534 | 734 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 735 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 736 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
ad72cf98 | 737 | schedule_delayed_work(&ap->hotplug_task, 0); |
1cdaf534 TH |
738 | |
739 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
740 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); | |
580b2102 | 741 | |
b51e9e5d | 742 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 743 | |
c6cf9e99 | 744 | /* tell wait_eh that we're done */ |
b51e9e5d | 745 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
746 | wake_up_all(&ap->eh_wait_q); |
747 | ||
e30349d2 | 748 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 749 | |
ece1d636 | 750 | DPRINTK("EXIT\n"); |
ece1d636 TH |
751 | } |
752 | ||
c6cf9e99 TH |
753 | /** |
754 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
755 | * @ap: Port to wait EH for | |
756 | * | |
757 | * Wait until the currently pending EH is complete. | |
758 | * | |
759 | * LOCKING: | |
760 | * Kernel thread context (may sleep). | |
761 | */ | |
762 | void ata_port_wait_eh(struct ata_port *ap) | |
763 | { | |
764 | unsigned long flags; | |
765 | DEFINE_WAIT(wait); | |
766 | ||
767 | retry: | |
ba6a1308 | 768 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 769 | |
b51e9e5d | 770 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 771 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 772 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 773 | schedule(); |
ba6a1308 | 774 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 775 | } |
0a1b622e | 776 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 777 | |
ba6a1308 | 778 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
779 | |
780 | /* make sure SCSI EH is complete */ | |
cca3974e | 781 | if (scsi_host_in_recovery(ap->scsi_host)) { |
97750ceb | 782 | ata_msleep(ap, 10); |
c6cf9e99 TH |
783 | goto retry; |
784 | } | |
785 | } | |
786 | ||
5ddf24c5 TH |
787 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
788 | { | |
789 | unsigned int tag; | |
790 | int nr = 0; | |
791 | ||
792 | /* count only non-internal commands */ | |
793 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
794 | if (ata_qc_from_tag(ap, tag)) | |
795 | nr++; | |
796 | ||
797 | return nr; | |
798 | } | |
799 | ||
800 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
801 | { | |
802 | struct ata_port *ap = (void *)arg; | |
803 | unsigned long flags; | |
804 | int cnt; | |
805 | ||
806 | spin_lock_irqsave(ap->lock, flags); | |
807 | ||
808 | cnt = ata_eh_nr_in_flight(ap); | |
809 | ||
810 | /* are we done? */ | |
811 | if (!cnt) | |
812 | goto out_unlock; | |
813 | ||
814 | if (cnt == ap->fastdrain_cnt) { | |
815 | unsigned int tag; | |
816 | ||
817 | /* No progress during the last interval, tag all | |
818 | * in-flight qcs as timed out and freeze the port. | |
819 | */ | |
820 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
821 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
822 | if (qc) | |
823 | qc->err_mask |= AC_ERR_TIMEOUT; | |
824 | } | |
825 | ||
826 | ata_port_freeze(ap); | |
827 | } else { | |
828 | /* some qcs have finished, give it another chance */ | |
829 | ap->fastdrain_cnt = cnt; | |
830 | ap->fastdrain_timer.expires = | |
341c2c95 | 831 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
832 | add_timer(&ap->fastdrain_timer); |
833 | } | |
834 | ||
835 | out_unlock: | |
836 | spin_unlock_irqrestore(ap->lock, flags); | |
837 | } | |
838 | ||
839 | /** | |
840 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
841 | * @ap: target ATA port | |
842 | * @fastdrain: activate fast drain | |
843 | * | |
844 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
845 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
846 | * that EH kicks in in timely manner. | |
847 | * | |
848 | * LOCKING: | |
849 | * spin_lock_irqsave(host lock) | |
850 | */ | |
851 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
852 | { | |
853 | int cnt; | |
854 | ||
855 | /* already scheduled? */ | |
856 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
857 | return; | |
858 | ||
859 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
860 | ||
861 | if (!fastdrain) | |
862 | return; | |
863 | ||
864 | /* do we have in-flight qcs? */ | |
865 | cnt = ata_eh_nr_in_flight(ap); | |
866 | if (!cnt) | |
867 | return; | |
868 | ||
869 | /* activate fast drain */ | |
870 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
871 | ap->fastdrain_timer.expires = |
872 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
873 | add_timer(&ap->fastdrain_timer); |
874 | } | |
875 | ||
f686bcb8 TH |
876 | /** |
877 | * ata_qc_schedule_eh - schedule qc for error handling | |
878 | * @qc: command to schedule error handling for | |
879 | * | |
880 | * Schedule error handling for @qc. EH will kick in as soon as | |
881 | * other commands are drained. | |
882 | * | |
883 | * LOCKING: | |
cca3974e | 884 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
885 | */ |
886 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
887 | { | |
888 | struct ata_port *ap = qc->ap; | |
fa41efda TH |
889 | struct request_queue *q = qc->scsicmd->device->request_queue; |
890 | unsigned long flags; | |
f686bcb8 TH |
891 | |
892 | WARN_ON(!ap->ops->error_handler); | |
893 | ||
894 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 895 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
896 | |
897 | /* The following will fail if timeout has already expired. | |
898 | * ata_scsi_error() takes care of such scmds on EH entry. | |
899 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
900 | * this function completes. | |
901 | */ | |
fa41efda | 902 | spin_lock_irqsave(q->queue_lock, flags); |
242f9dcb | 903 | blk_abort_request(qc->scsicmd->request); |
fa41efda | 904 | spin_unlock_irqrestore(q->queue_lock, flags); |
f686bcb8 TH |
905 | } |
906 | ||
7b70fc03 TH |
907 | /** |
908 | * ata_port_schedule_eh - schedule error handling without a qc | |
909 | * @ap: ATA port to schedule EH for | |
910 | * | |
911 | * Schedule error handling for @ap. EH will kick in as soon as | |
912 | * all commands are drained. | |
913 | * | |
914 | * LOCKING: | |
cca3974e | 915 | * spin_lock_irqsave(host lock) |
7b70fc03 TH |
916 | */ |
917 | void ata_port_schedule_eh(struct ata_port *ap) | |
918 | { | |
919 | WARN_ON(!ap->ops->error_handler); | |
920 | ||
f4d6d004 TH |
921 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
922 | return; | |
923 | ||
5ddf24c5 | 924 | ata_eh_set_pending(ap, 1); |
cca3974e | 925 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
926 | |
927 | DPRINTK("port EH scheduled\n"); | |
928 | } | |
929 | ||
dbd82616 | 930 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
931 | { |
932 | int tag, nr_aborted = 0; | |
933 | ||
934 | WARN_ON(!ap->ops->error_handler); | |
935 | ||
5ddf24c5 TH |
936 | /* we're gonna abort all commands, no need for fast drain */ |
937 | ata_eh_set_pending(ap, 0); | |
938 | ||
7b70fc03 TH |
939 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
940 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
941 | ||
dbd82616 | 942 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
943 | qc->flags |= ATA_QCFLAG_FAILED; |
944 | ata_qc_complete(qc); | |
945 | nr_aborted++; | |
946 | } | |
947 | } | |
948 | ||
949 | if (!nr_aborted) | |
950 | ata_port_schedule_eh(ap); | |
951 | ||
952 | return nr_aborted; | |
953 | } | |
954 | ||
dbd82616 TH |
955 | /** |
956 | * ata_link_abort - abort all qc's on the link | |
957 | * @link: ATA link to abort qc's for | |
958 | * | |
959 | * Abort all active qc's active on @link and schedule EH. | |
960 | * | |
961 | * LOCKING: | |
962 | * spin_lock_irqsave(host lock) | |
963 | * | |
964 | * RETURNS: | |
965 | * Number of aborted qc's. | |
966 | */ | |
967 | int ata_link_abort(struct ata_link *link) | |
968 | { | |
969 | return ata_do_link_abort(link->ap, link); | |
970 | } | |
971 | ||
972 | /** | |
973 | * ata_port_abort - abort all qc's on the port | |
974 | * @ap: ATA port to abort qc's for | |
975 | * | |
976 | * Abort all active qc's of @ap and schedule EH. | |
977 | * | |
978 | * LOCKING: | |
979 | * spin_lock_irqsave(host_set lock) | |
980 | * | |
981 | * RETURNS: | |
982 | * Number of aborted qc's. | |
983 | */ | |
984 | int ata_port_abort(struct ata_port *ap) | |
985 | { | |
986 | return ata_do_link_abort(ap, NULL); | |
987 | } | |
988 | ||
e3180499 TH |
989 | /** |
990 | * __ata_port_freeze - freeze port | |
991 | * @ap: ATA port to freeze | |
992 | * | |
993 | * This function is called when HSM violation or some other | |
994 | * condition disrupts normal operation of the port. Frozen port | |
995 | * is not allowed to perform any operation until the port is | |
996 | * thawed, which usually follows a successful reset. | |
997 | * | |
998 | * ap->ops->freeze() callback can be used for freezing the port | |
999 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
1000 | * port cannot be frozen hardware-wise, the interrupt handler | |
1001 | * must ack and clear interrupts unconditionally while the port | |
1002 | * is frozen. | |
1003 | * | |
1004 | * LOCKING: | |
cca3974e | 1005 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1006 | */ |
1007 | static void __ata_port_freeze(struct ata_port *ap) | |
1008 | { | |
1009 | WARN_ON(!ap->ops->error_handler); | |
1010 | ||
1011 | if (ap->ops->freeze) | |
1012 | ap->ops->freeze(ap); | |
1013 | ||
b51e9e5d | 1014 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 1015 | |
44877b4e | 1016 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
1017 | } |
1018 | ||
1019 | /** | |
1020 | * ata_port_freeze - abort & freeze port | |
1021 | * @ap: ATA port to freeze | |
1022 | * | |
54c38444 JG |
1023 | * Abort and freeze @ap. The freeze operation must be called |
1024 | * first, because some hardware requires special operations | |
1025 | * before the taskfile registers are accessible. | |
e3180499 TH |
1026 | * |
1027 | * LOCKING: | |
cca3974e | 1028 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1029 | * |
1030 | * RETURNS: | |
1031 | * Number of aborted commands. | |
1032 | */ | |
1033 | int ata_port_freeze(struct ata_port *ap) | |
1034 | { | |
1035 | int nr_aborted; | |
1036 | ||
1037 | WARN_ON(!ap->ops->error_handler); | |
1038 | ||
e3180499 | 1039 | __ata_port_freeze(ap); |
54c38444 | 1040 | nr_aborted = ata_port_abort(ap); |
e3180499 TH |
1041 | |
1042 | return nr_aborted; | |
1043 | } | |
1044 | ||
7d77b247 TH |
1045 | /** |
1046 | * sata_async_notification - SATA async notification handler | |
1047 | * @ap: ATA port where async notification is received | |
1048 | * | |
1049 | * Handler to be called when async notification via SDB FIS is | |
1050 | * received. This function schedules EH if necessary. | |
1051 | * | |
1052 | * LOCKING: | |
1053 | * spin_lock_irqsave(host lock) | |
1054 | * | |
1055 | * RETURNS: | |
1056 | * 1 if EH is scheduled, 0 otherwise. | |
1057 | */ | |
1058 | int sata_async_notification(struct ata_port *ap) | |
1059 | { | |
1060 | u32 sntf; | |
1061 | int rc; | |
1062 | ||
1063 | if (!(ap->flags & ATA_FLAG_AN)) | |
1064 | return 0; | |
1065 | ||
1066 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
1067 | if (rc == 0) | |
1068 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1069 | ||
071f44b1 | 1070 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1071 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1072 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1073 | /* PMP is not attached. Check whether ATAPI |
1074 | * AN is configured. If so, notify media | |
1075 | * change. | |
1076 | */ | |
1077 | struct ata_device *dev = ap->link.device; | |
1078 | ||
1079 | if ((dev->class == ATA_DEV_ATAPI) && | |
1080 | (dev->flags & ATA_DFLAG_AN)) | |
1081 | ata_scsi_media_change_notify(dev); | |
1082 | return 0; | |
1083 | } else { | |
1084 | /* PMP is attached but SNTF is not available. | |
1085 | * ATAPI async media change notification is | |
1086 | * not used. The PMP must be reporting PHY | |
1087 | * status change, schedule EH. | |
1088 | */ | |
1089 | ata_port_schedule_eh(ap); | |
1090 | return 1; | |
1091 | } | |
1092 | } else { | |
1093 | /* PMP is attached and SNTF is available */ | |
1094 | struct ata_link *link; | |
1095 | ||
1096 | /* check and notify ATAPI AN */ | |
1eca4365 | 1097 | ata_for_each_link(link, ap, EDGE) { |
7d77b247 TH |
1098 | if (!(sntf & (1 << link->pmp))) |
1099 | continue; | |
1100 | ||
1101 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1102 | (link->device->flags & ATA_DFLAG_AN)) | |
1103 | ata_scsi_media_change_notify(link->device); | |
1104 | } | |
1105 | ||
1106 | /* If PMP is reporting that PHY status of some | |
1107 | * downstream ports has changed, schedule EH. | |
1108 | */ | |
1109 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1110 | ata_port_schedule_eh(ap); | |
1111 | return 1; | |
1112 | } | |
1113 | ||
1114 | return 0; | |
1115 | } | |
1116 | } | |
1117 | ||
e3180499 TH |
1118 | /** |
1119 | * ata_eh_freeze_port - EH helper to freeze port | |
1120 | * @ap: ATA port to freeze | |
1121 | * | |
1122 | * Freeze @ap. | |
1123 | * | |
1124 | * LOCKING: | |
1125 | * None. | |
1126 | */ | |
1127 | void ata_eh_freeze_port(struct ata_port *ap) | |
1128 | { | |
1129 | unsigned long flags; | |
1130 | ||
1131 | if (!ap->ops->error_handler) | |
1132 | return; | |
1133 | ||
ba6a1308 | 1134 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1135 | __ata_port_freeze(ap); |
ba6a1308 | 1136 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1137 | } |
1138 | ||
1139 | /** | |
1140 | * ata_port_thaw_port - EH helper to thaw port | |
1141 | * @ap: ATA port to thaw | |
1142 | * | |
1143 | * Thaw frozen port @ap. | |
1144 | * | |
1145 | * LOCKING: | |
1146 | * None. | |
1147 | */ | |
1148 | void ata_eh_thaw_port(struct ata_port *ap) | |
1149 | { | |
1150 | unsigned long flags; | |
1151 | ||
1152 | if (!ap->ops->error_handler) | |
1153 | return; | |
1154 | ||
ba6a1308 | 1155 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1156 | |
b51e9e5d | 1157 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1158 | |
1159 | if (ap->ops->thaw) | |
1160 | ap->ops->thaw(ap); | |
1161 | ||
ba6a1308 | 1162 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1163 | |
44877b4e | 1164 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1165 | } |
1166 | ||
ece1d636 TH |
1167 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1168 | { | |
1169 | /* nada */ | |
1170 | } | |
1171 | ||
1172 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1173 | { | |
1174 | struct ata_port *ap = qc->ap; | |
1175 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1176 | unsigned long flags; | |
1177 | ||
ba6a1308 | 1178 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1179 | qc->scsidone = ata_eh_scsidone; |
1180 | __ata_qc_complete(qc); | |
1181 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1182 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1183 | |
1184 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1189 | * @qc: Command to complete | |
1190 | * | |
1191 | * Indicate to the mid and upper layers that an ATA command has | |
1192 | * completed. To be used from EH. | |
1193 | */ | |
1194 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1195 | { | |
1196 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1197 | scmd->retries = scmd->allowed; | |
1198 | __ata_eh_qc_complete(qc); | |
1199 | } | |
1200 | ||
1201 | /** | |
1202 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1203 | * @qc: Command to retry | |
1204 | * | |
1205 | * Indicate to the mid and upper layers that an ATA command | |
1206 | * should be retried. To be used from EH. | |
1207 | * | |
1208 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
1209 | * scmd->retries is decremented for commands which get retried | |
1210 | * due to unrelated failures (qc->err_mask is zero). | |
1211 | */ | |
1212 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1213 | { | |
1214 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1215 | if (!qc->err_mask && scmd->retries) | |
1216 | scmd->retries--; | |
1217 | __ata_eh_qc_complete(qc); | |
1218 | } | |
022bdb07 | 1219 | |
678afac6 TH |
1220 | /** |
1221 | * ata_dev_disable - disable ATA device | |
1222 | * @dev: ATA device to disable | |
1223 | * | |
1224 | * Disable @dev. | |
1225 | * | |
1226 | * Locking: | |
1227 | * EH context. | |
1228 | */ | |
1229 | void ata_dev_disable(struct ata_device *dev) | |
1230 | { | |
1231 | if (!ata_dev_enabled(dev)) | |
1232 | return; | |
1233 | ||
1234 | if (ata_msg_drv(dev->link->ap)) | |
1235 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); | |
1236 | ata_acpi_on_disable(dev); | |
1237 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1238 | dev->class++; | |
99cf610a TH |
1239 | |
1240 | /* From now till the next successful probe, ering is used to | |
1241 | * track probe failures. Clear accumulated device error info. | |
1242 | */ | |
1243 | ata_ering_clear(&dev->ering); | |
678afac6 TH |
1244 | } |
1245 | ||
0ea035a3 TH |
1246 | /** |
1247 | * ata_eh_detach_dev - detach ATA device | |
1248 | * @dev: ATA device to detach | |
1249 | * | |
1250 | * Detach @dev. | |
1251 | * | |
1252 | * LOCKING: | |
1253 | * None. | |
1254 | */ | |
fb7fd614 | 1255 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1256 | { |
f58229f8 TH |
1257 | struct ata_link *link = dev->link; |
1258 | struct ata_port *ap = link->ap; | |
90484ebf | 1259 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1260 | unsigned long flags; |
1261 | ||
1262 | ata_dev_disable(dev); | |
1263 | ||
ba6a1308 | 1264 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1265 | |
1266 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1267 | ||
1268 | if (ata_scsi_offline_dev(dev)) { | |
1269 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1270 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1271 | } |
1272 | ||
90484ebf | 1273 | /* clear per-dev EH info */ |
f58229f8 TH |
1274 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1275 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1276 | ehc->saved_xfer_mode[dev->devno] = 0; |
1277 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1278 | |
ba6a1308 | 1279 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1280 | } |
1281 | ||
022bdb07 TH |
1282 | /** |
1283 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1284 | * @link: target ATA link |
47005f25 | 1285 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1286 | * @action: action about to be performed |
1287 | * | |
1288 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1289 | * in @link->eh_info such that eh actions are not unnecessarily |
1290 | * repeated. | |
022bdb07 TH |
1291 | * |
1292 | * LOCKING: | |
1293 | * None. | |
1294 | */ | |
fb7fd614 TH |
1295 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1296 | unsigned int action) | |
022bdb07 | 1297 | { |
955e57df TH |
1298 | struct ata_port *ap = link->ap; |
1299 | struct ata_eh_info *ehi = &link->eh_info; | |
1300 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1301 | unsigned long flags; |
1302 | ||
ba6a1308 | 1303 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1304 | |
955e57df | 1305 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1306 | |
a568d1d2 TH |
1307 | /* About to take EH action, set RECOVERED. Ignore actions on |
1308 | * slave links as master will do them again. | |
1309 | */ | |
1310 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1311 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1312 | ||
ba6a1308 | 1313 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1314 | } |
1315 | ||
47005f25 TH |
1316 | /** |
1317 | * ata_eh_done - EH action complete | |
955e57df | 1318 | * @ap: target ATA port |
47005f25 TH |
1319 | * @dev: target ATA dev for per-dev action (can be NULL) |
1320 | * @action: action just completed | |
1321 | * | |
1322 | * Called right after performing EH actions to clear related bits | |
955e57df | 1323 | * in @link->eh_context. |
47005f25 TH |
1324 | * |
1325 | * LOCKING: | |
1326 | * None. | |
1327 | */ | |
fb7fd614 TH |
1328 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1329 | unsigned int action) | |
47005f25 | 1330 | { |
955e57df | 1331 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1332 | |
955e57df | 1333 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1334 | } |
1335 | ||
022bdb07 TH |
1336 | /** |
1337 | * ata_err_string - convert err_mask to descriptive string | |
1338 | * @err_mask: error mask to convert to string | |
1339 | * | |
1340 | * Convert @err_mask to descriptive string. Errors are | |
1341 | * prioritized according to severity and only the most severe | |
1342 | * error is reported. | |
1343 | * | |
1344 | * LOCKING: | |
1345 | * None. | |
1346 | * | |
1347 | * RETURNS: | |
1348 | * Descriptive string for @err_mask | |
1349 | */ | |
2dcb407e | 1350 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1351 | { |
1352 | if (err_mask & AC_ERR_HOST_BUS) | |
1353 | return "host bus error"; | |
1354 | if (err_mask & AC_ERR_ATA_BUS) | |
1355 | return "ATA bus error"; | |
1356 | if (err_mask & AC_ERR_TIMEOUT) | |
1357 | return "timeout"; | |
1358 | if (err_mask & AC_ERR_HSM) | |
1359 | return "HSM violation"; | |
1360 | if (err_mask & AC_ERR_SYSTEM) | |
1361 | return "internal error"; | |
1362 | if (err_mask & AC_ERR_MEDIA) | |
1363 | return "media error"; | |
1364 | if (err_mask & AC_ERR_INVALID) | |
1365 | return "invalid argument"; | |
1366 | if (err_mask & AC_ERR_DEV) | |
1367 | return "device error"; | |
1368 | return "unknown error"; | |
1369 | } | |
1370 | ||
e8ee8451 TH |
1371 | /** |
1372 | * ata_read_log_page - read a specific log page | |
1373 | * @dev: target device | |
1374 | * @page: page to read | |
1375 | * @buf: buffer to store read page | |
1376 | * @sectors: number of sectors to read | |
1377 | * | |
1378 | * Read log page using READ_LOG_EXT command. | |
1379 | * | |
1380 | * LOCKING: | |
1381 | * Kernel thread context (may sleep). | |
1382 | * | |
1383 | * RETURNS: | |
1384 | * 0 on success, AC_ERR_* mask otherwise. | |
1385 | */ | |
1386 | static unsigned int ata_read_log_page(struct ata_device *dev, | |
1387 | u8 page, void *buf, unsigned int sectors) | |
1388 | { | |
1389 | struct ata_taskfile tf; | |
1390 | unsigned int err_mask; | |
1391 | ||
1392 | DPRINTK("read log page - page %d\n", page); | |
1393 | ||
1394 | ata_tf_init(dev, &tf); | |
1395 | tf.command = ATA_CMD_READ_LOG_EXT; | |
1396 | tf.lbal = page; | |
1397 | tf.nsect = sectors; | |
1398 | tf.hob_nsect = sectors >> 8; | |
1399 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
1400 | tf.protocol = ATA_PROT_PIO; | |
1401 | ||
1402 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1403 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 TH |
1404 | |
1405 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
1406 | return err_mask; | |
1407 | } | |
1408 | ||
1409 | /** | |
1410 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1411 | * @dev: Device to read log page 10h from | |
1412 | * @tag: Resulting tag of the failed command | |
1413 | * @tf: Resulting taskfile registers of the failed command | |
1414 | * | |
1415 | * Read log page 10h to obtain NCQ error details and clear error | |
1416 | * condition. | |
1417 | * | |
1418 | * LOCKING: | |
1419 | * Kernel thread context (may sleep). | |
1420 | * | |
1421 | * RETURNS: | |
1422 | * 0 on success, -errno otherwise. | |
1423 | */ | |
1424 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1425 | int *tag, struct ata_taskfile *tf) | |
1426 | { | |
9af5c9c9 | 1427 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1428 | unsigned int err_mask; |
1429 | u8 csum; | |
1430 | int i; | |
1431 | ||
1432 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); | |
1433 | if (err_mask) | |
1434 | return -EIO; | |
1435 | ||
1436 | csum = 0; | |
1437 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1438 | csum += buf[i]; | |
1439 | if (csum) | |
1440 | ata_dev_printk(dev, KERN_WARNING, | |
1441 | "invalid checksum 0x%x on log page 10h\n", csum); | |
1442 | ||
1443 | if (buf[0] & 0x80) | |
1444 | return -ENOENT; | |
1445 | ||
1446 | *tag = buf[0] & 0x1f; | |
1447 | ||
1448 | tf->command = buf[2]; | |
1449 | tf->feature = buf[3]; | |
1450 | tf->lbal = buf[4]; | |
1451 | tf->lbam = buf[5]; | |
1452 | tf->lbah = buf[6]; | |
1453 | tf->device = buf[7]; | |
1454 | tf->hob_lbal = buf[8]; | |
1455 | tf->hob_lbam = buf[9]; | |
1456 | tf->hob_lbah = buf[10]; | |
1457 | tf->nsect = buf[12]; | |
1458 | tf->hob_nsect = buf[13]; | |
1459 | ||
1460 | return 0; | |
1461 | } | |
1462 | ||
11fc33da TH |
1463 | /** |
1464 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1465 | * @dev: target ATAPI device | |
1466 | * @r_sense_key: out parameter for sense_key | |
1467 | * | |
1468 | * Perform ATAPI TEST_UNIT_READY. | |
1469 | * | |
1470 | * LOCKING: | |
1471 | * EH context (may sleep). | |
1472 | * | |
1473 | * RETURNS: | |
1474 | * 0 on success, AC_ERR_* mask on failure. | |
1475 | */ | |
1476 | static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) | |
1477 | { | |
1478 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1479 | struct ata_taskfile tf; | |
1480 | unsigned int err_mask; | |
1481 | ||
1482 | ata_tf_init(dev, &tf); | |
1483 | ||
1484 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1485 | tf.command = ATA_CMD_PACKET; | |
1486 | tf.protocol = ATAPI_PROT_NODATA; | |
1487 | ||
1488 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1489 | if (err_mask == AC_ERR_DEV) | |
1490 | *r_sense_key = tf.feature >> 4; | |
1491 | return err_mask; | |
1492 | } | |
1493 | ||
022bdb07 TH |
1494 | /** |
1495 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1496 | * @dev: device to perform REQUEST_SENSE to | |
1497 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1498 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1499 | * |
1500 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1501 | * SENSE. This function is EH helper. | |
1502 | * | |
1503 | * LOCKING: | |
1504 | * Kernel thread context (may sleep). | |
1505 | * | |
1506 | * RETURNS: | |
1507 | * 0 on success, AC_ERR_* mask on failure | |
1508 | */ | |
3eabddb8 TH |
1509 | static unsigned int atapi_eh_request_sense(struct ata_device *dev, |
1510 | u8 *sense_buf, u8 dfl_sense_key) | |
022bdb07 | 1511 | { |
3eabddb8 TH |
1512 | u8 cdb[ATAPI_CDB_LEN] = |
1513 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1514 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1515 | struct ata_taskfile tf; |
022bdb07 TH |
1516 | |
1517 | DPRINTK("ATAPI request sense\n"); | |
1518 | ||
022bdb07 TH |
1519 | /* FIXME: is this needed? */ |
1520 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
1521 | ||
56287768 AL |
1522 | /* initialize sense_buf with the error register, |
1523 | * for the case where they are -not- overwritten | |
1524 | */ | |
022bdb07 | 1525 | sense_buf[0] = 0x70; |
3eabddb8 | 1526 | sense_buf[2] = dfl_sense_key; |
56287768 | 1527 | |
a617c09f | 1528 | /* some devices time out if garbage left in tf */ |
56287768 | 1529 | ata_tf_init(dev, &tf); |
022bdb07 | 1530 | |
022bdb07 TH |
1531 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1532 | tf.command = ATA_CMD_PACKET; | |
1533 | ||
1534 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1535 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1536 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1537 | tf.feature |= ATAPI_PKT_DMA; |
1538 | } else { | |
0dc36888 | 1539 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1540 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1541 | tf.lbah = 0; | |
022bdb07 TH |
1542 | } |
1543 | ||
1544 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1545 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1546 | } |
1547 | ||
1548 | /** | |
1549 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1550 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1551 | * |
1552 | * Analyze SError if available and further determine cause of | |
1553 | * failure. | |
1554 | * | |
1555 | * LOCKING: | |
1556 | * None. | |
1557 | */ | |
0260731f | 1558 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1559 | { |
0260731f | 1560 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1561 | u32 serror = ehc->i.serror; |
1562 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1563 | u32 hotplug_mask; |
022bdb07 | 1564 | |
e0614db2 | 1565 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1566 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1567 | action |= ATA_EH_RESET; |
022bdb07 TH |
1568 | } |
1569 | if (serror & SERR_PROTOCOL) { | |
1570 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1571 | action |= ATA_EH_RESET; |
022bdb07 TH |
1572 | } |
1573 | if (serror & SERR_INTERNAL) { | |
1574 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1575 | action |= ATA_EH_RESET; |
022bdb07 | 1576 | } |
f9df58cb TH |
1577 | |
1578 | /* Determine whether a hotplug event has occurred. Both | |
1579 | * SError.N/X are considered hotplug events for enabled or | |
1580 | * host links. For disabled PMP links, only N bit is | |
1581 | * considered as X bit is left at 1 for link plugging. | |
1582 | */ | |
6b7ae954 TH |
1583 | if (link->lpm_policy != ATA_LPM_MAX_POWER) |
1584 | hotplug_mask = 0; /* hotplug doesn't work w/ LPM */ | |
1585 | else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
f9df58cb TH |
1586 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; |
1587 | else | |
1588 | hotplug_mask = SERR_PHYRDY_CHG; | |
1589 | ||
1590 | if (serror & hotplug_mask) | |
084fe639 | 1591 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1592 | |
1593 | ehc->i.err_mask |= err_mask; | |
1594 | ehc->i.action |= action; | |
1595 | } | |
1596 | ||
e8ee8451 TH |
1597 | /** |
1598 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1599 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1600 | * |
1601 | * Read log page 10h, determine the offending qc and acquire | |
1602 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1603 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1604 | * care of the rest. | |
1605 | * | |
1606 | * LOCKING: | |
1607 | * Kernel thread context (may sleep). | |
1608 | */ | |
10acf3b0 | 1609 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1610 | { |
0260731f TH |
1611 | struct ata_port *ap = link->ap; |
1612 | struct ata_eh_context *ehc = &link->eh_context; | |
1613 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1614 | struct ata_queued_cmd *qc; |
1615 | struct ata_taskfile tf; | |
1616 | int tag, rc; | |
1617 | ||
1618 | /* if frozen, we can't do much */ | |
b51e9e5d | 1619 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1620 | return; |
1621 | ||
1622 | /* is it NCQ device error? */ | |
0260731f | 1623 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1624 | return; |
1625 | ||
1626 | /* has LLDD analyzed already? */ | |
1627 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1628 | qc = __ata_qc_from_tag(ap, tag); | |
1629 | ||
1630 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1631 | continue; | |
1632 | ||
1633 | if (qc->err_mask) | |
1634 | return; | |
1635 | } | |
1636 | ||
1637 | /* okay, this error is ours */ | |
a09bf4cd | 1638 | memset(&tf, 0, sizeof(tf)); |
e8ee8451 TH |
1639 | rc = ata_eh_read_log_10h(dev, &tag, &tf); |
1640 | if (rc) { | |
0260731f | 1641 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
e8ee8451 TH |
1642 | "(errno=%d)\n", rc); |
1643 | return; | |
1644 | } | |
1645 | ||
0260731f TH |
1646 | if (!(link->sactive & (1 << tag))) { |
1647 | ata_link_printk(link, KERN_ERR, "log page 10h reported " | |
e8ee8451 TH |
1648 | "inactive tag %d\n", tag); |
1649 | return; | |
1650 | } | |
1651 | ||
1652 | /* we've got the perpetrator, condemn it */ | |
1653 | qc = __ata_qc_from_tag(ap, tag); | |
1654 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1655 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1656 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
e8ee8451 TH |
1657 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1658 | } | |
1659 | ||
022bdb07 TH |
1660 | /** |
1661 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1662 | * @qc: qc to analyze | |
1663 | * @tf: Taskfile registers to analyze | |
1664 | * | |
1665 | * Analyze taskfile of @qc and further determine cause of | |
1666 | * failure. This function also requests ATAPI sense data if | |
1667 | * avaliable. | |
1668 | * | |
1669 | * LOCKING: | |
1670 | * Kernel thread context (may sleep). | |
1671 | * | |
1672 | * RETURNS: | |
1673 | * Determined recovery action | |
1674 | */ | |
1675 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1676 | const struct ata_taskfile *tf) | |
1677 | { | |
1678 | unsigned int tmp, action = 0; | |
1679 | u8 stat = tf->command, err = tf->feature; | |
1680 | ||
1681 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1682 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1683 | return ATA_EH_RESET; |
022bdb07 TH |
1684 | } |
1685 | ||
a51d644a TH |
1686 | if (stat & (ATA_ERR | ATA_DF)) |
1687 | qc->err_mask |= AC_ERR_DEV; | |
1688 | else | |
022bdb07 TH |
1689 | return 0; |
1690 | ||
1691 | switch (qc->dev->class) { | |
1692 | case ATA_DEV_ATA: | |
1693 | if (err & ATA_ICRC) | |
1694 | qc->err_mask |= AC_ERR_ATA_BUS; | |
1695 | if (err & ATA_UNC) | |
1696 | qc->err_mask |= AC_ERR_MEDIA; | |
1697 | if (err & ATA_IDNF) | |
1698 | qc->err_mask |= AC_ERR_INVALID; | |
1699 | break; | |
1700 | ||
1701 | case ATA_DEV_ATAPI: | |
a569a30d | 1702 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1703 | tmp = atapi_eh_request_sense(qc->dev, |
1704 | qc->scsicmd->sense_buffer, | |
1705 | qc->result_tf.feature >> 4); | |
a569a30d TH |
1706 | if (!tmp) { |
1707 | /* ATA_QCFLAG_SENSE_VALID is used to | |
1708 | * tell atapi_qc_complete() that sense | |
1709 | * data is already valid. | |
1710 | * | |
1711 | * TODO: interpret sense data and set | |
1712 | * appropriate err_mask. | |
1713 | */ | |
1714 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
1715 | } else | |
1716 | qc->err_mask |= tmp; | |
1717 | } | |
022bdb07 TH |
1718 | } |
1719 | ||
1720 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) | |
cf480626 | 1721 | action |= ATA_EH_RESET; |
022bdb07 TH |
1722 | |
1723 | return action; | |
1724 | } | |
1725 | ||
76326ac1 TH |
1726 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1727 | int *xfer_ok) | |
022bdb07 | 1728 | { |
76326ac1 TH |
1729 | int base = 0; |
1730 | ||
1731 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1732 | *xfer_ok = 1; | |
1733 | ||
1734 | if (!*xfer_ok) | |
75f9cafc | 1735 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1736 | |
7d47e8d4 | 1737 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1738 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1739 | |
7d47e8d4 | 1740 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1741 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1742 | |
3884f7b0 | 1743 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1744 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1745 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1746 | if ((err_mask & |
1747 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1748 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1749 | } |
1750 | ||
1751 | return 0; | |
1752 | } | |
1753 | ||
7d47e8d4 | 1754 | struct speed_down_verdict_arg { |
022bdb07 | 1755 | u64 since; |
76326ac1 | 1756 | int xfer_ok; |
3884f7b0 | 1757 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1758 | }; |
1759 | ||
7d47e8d4 | 1760 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1761 | { |
7d47e8d4 | 1762 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1763 | int cat; |
022bdb07 | 1764 | |
d9027470 | 1765 | if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since)) |
022bdb07 TH |
1766 | return -1; |
1767 | ||
76326ac1 TH |
1768 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1769 | &arg->xfer_ok); | |
7d47e8d4 | 1770 | arg->nr_errors[cat]++; |
76326ac1 | 1771 | |
022bdb07 TH |
1772 | return 0; |
1773 | } | |
1774 | ||
1775 | /** | |
7d47e8d4 | 1776 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1777 | * @dev: Device of interest |
1778 | * | |
1779 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1780 | * whether NCQ needs to be turned off, transfer speed should be |
1781 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1782 | * |
3884f7b0 TH |
1783 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1784 | * | |
1785 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1786 | * IO commands | |
1787 | * | |
1788 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1789 | * | |
76326ac1 TH |
1790 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1791 | * data transfer hasn't been verified. | |
1792 | * | |
3884f7b0 TH |
1793 | * Verdicts are |
1794 | * | |
1795 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1796 | * |
3884f7b0 TH |
1797 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1798 | * to PIO. | |
7d47e8d4 | 1799 | * |
3884f7b0 | 1800 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1801 | * |
3884f7b0 | 1802 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1803 | * taken per error. An action triggered by non-DUBIOUS errors |
1804 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1805 | * This is to expedite speed down decisions right after device is | |
1806 | * initially configured. | |
1807 | * | |
1808 | * The followings are speed down rules. #1 and #2 deal with | |
1809 | * DUBIOUS errors. | |
7d47e8d4 | 1810 | * |
76326ac1 TH |
1811 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1812 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1813 | * | |
1814 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1815 | * occurred during last 5 mins, NCQ_OFF. | |
1816 | * | |
1817 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
3884f7b0 | 1818 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1819 | * |
76326ac1 | 1820 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1821 | * during last 10 mins, NCQ_OFF. |
1822 | * | |
76326ac1 | 1823 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1824 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1825 | * |
022bdb07 TH |
1826 | * LOCKING: |
1827 | * Inherited from caller. | |
1828 | * | |
1829 | * RETURNS: | |
7d47e8d4 | 1830 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1831 | */ |
7d47e8d4 | 1832 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1833 | { |
7d47e8d4 TH |
1834 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1835 | u64 j64 = get_jiffies_64(); | |
1836 | struct speed_down_verdict_arg arg; | |
1837 | unsigned int verdict = 0; | |
022bdb07 | 1838 | |
3884f7b0 | 1839 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1840 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1841 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1842 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1843 | |
76326ac1 TH |
1844 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1845 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1846 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1847 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1848 | ||
1849 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1850 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1851 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1852 | ||
3884f7b0 TH |
1853 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1854 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1855 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1856 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1857 | |
3884f7b0 | 1858 | /* scan past 10 mins of error history */ |
022bdb07 | 1859 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1860 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1861 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1862 | |
3884f7b0 TH |
1863 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1864 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1865 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1866 | ||
1867 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1868 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1869 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1870 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1871 | |
7d47e8d4 | 1872 | return verdict; |
022bdb07 TH |
1873 | } |
1874 | ||
1875 | /** | |
1876 | * ata_eh_speed_down - record error and speed down if necessary | |
1877 | * @dev: Failed device | |
3884f7b0 | 1878 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1879 | * @err_mask: err_mask of the error |
1880 | * | |
1881 | * Record error and examine error history to determine whether | |
1882 | * adjusting transmission speed is necessary. It also sets | |
1883 | * transmission limits appropriately if such adjustment is | |
1884 | * necessary. | |
1885 | * | |
1886 | * LOCKING: | |
1887 | * Kernel thread context (may sleep). | |
1888 | * | |
1889 | * RETURNS: | |
7d47e8d4 | 1890 | * Determined recovery action. |
022bdb07 | 1891 | */ |
3884f7b0 TH |
1892 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1893 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1894 | { |
b1c72916 | 1895 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 1896 | int xfer_ok = 0; |
7d47e8d4 TH |
1897 | unsigned int verdict; |
1898 | unsigned int action = 0; | |
1899 | ||
1900 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1901 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1902 | return 0; |
1903 | ||
1904 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1905 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1906 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1907 | |
7d47e8d4 TH |
1908 | /* turn off NCQ? */ |
1909 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1910 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1911 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1912 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
1913 | ata_dev_printk(dev, KERN_WARNING, | |
1914 | "NCQ disabled due to excessive errors\n"); | |
1915 | goto done; | |
1916 | } | |
022bdb07 | 1917 | |
7d47e8d4 TH |
1918 | /* speed down? */ |
1919 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1920 | /* speed down SATA link speed if possible */ | |
a07d499b | 1921 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 1922 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1923 | goto done; |
1924 | } | |
022bdb07 | 1925 | |
7d47e8d4 TH |
1926 | /* lower transfer mode */ |
1927 | if (dev->spdn_cnt < 2) { | |
1928 | static const int dma_dnxfer_sel[] = | |
1929 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1930 | static const int pio_dnxfer_sel[] = | |
1931 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1932 | int sel; | |
1933 | ||
1934 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1935 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1936 | else | |
1937 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1938 | ||
1939 | dev->spdn_cnt++; | |
1940 | ||
1941 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1942 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1943 | goto done; |
1944 | } | |
1945 | } | |
1946 | } | |
1947 | ||
1948 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1949 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1950 | */ |
1951 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1952 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1953 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1954 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1955 | dev->spdn_cnt = 0; | |
cf480626 | 1956 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1957 | goto done; |
1958 | } | |
1959 | } | |
022bdb07 | 1960 | |
022bdb07 | 1961 | return 0; |
7d47e8d4 TH |
1962 | done: |
1963 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1964 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1965 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1966 | return action; |
022bdb07 TH |
1967 | } |
1968 | ||
1969 | /** | |
9b1e2658 TH |
1970 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1971 | * @link: host link to perform autopsy on | |
022bdb07 | 1972 | * |
0260731f TH |
1973 | * Analyze why @link failed and determine which recovery actions |
1974 | * are needed. This function also sets more detailed AC_ERR_* | |
1975 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1976 | * |
1977 | * LOCKING: | |
1978 | * Kernel thread context (may sleep). | |
1979 | */ | |
9b1e2658 | 1980 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1981 | { |
0260731f | 1982 | struct ata_port *ap = link->ap; |
936fd732 | 1983 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 1984 | struct ata_device *dev; |
3884f7b0 TH |
1985 | unsigned int all_err_mask = 0, eflags = 0; |
1986 | int tag; | |
022bdb07 TH |
1987 | u32 serror; |
1988 | int rc; | |
1989 | ||
1990 | DPRINTK("ENTER\n"); | |
1991 | ||
1cdaf534 TH |
1992 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1993 | return; | |
1994 | ||
022bdb07 | 1995 | /* obtain and analyze SError */ |
936fd732 | 1996 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1997 | if (rc == 0) { |
1998 | ehc->i.serror |= serror; | |
0260731f | 1999 | ata_eh_analyze_serror(link); |
4e57c517 | 2000 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 2001 | /* SError read failed, force reset and probing */ |
b558eddd | 2002 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 2003 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
2004 | ehc->i.err_mask |= AC_ERR_OTHER; |
2005 | } | |
022bdb07 | 2006 | |
e8ee8451 | 2007 | /* analyze NCQ failure */ |
0260731f | 2008 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 2009 | |
022bdb07 TH |
2010 | /* any real error trumps AC_ERR_OTHER */ |
2011 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
2012 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
2013 | ||
2014 | all_err_mask |= ehc->i.err_mask; | |
2015 | ||
2016 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2017 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2018 | ||
b1c72916 TH |
2019 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2020 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
2021 | continue; |
2022 | ||
2023 | /* inherit upper level err_mask */ | |
2024 | qc->err_mask |= ehc->i.err_mask; | |
2025 | ||
022bdb07 | 2026 | /* analyze TF */ |
4528e4da | 2027 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
2028 | |
2029 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
2030 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
2031 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
2032 | AC_ERR_INVALID); | |
2033 | ||
2034 | /* any real error trumps unknown error */ | |
2035 | if (qc->err_mask & ~AC_ERR_OTHER) | |
2036 | qc->err_mask &= ~AC_ERR_OTHER; | |
2037 | ||
2038 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 2039 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 2040 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 | 2041 | |
03faab78 | 2042 | /* determine whether the command is worth retrying */ |
534ead70 TH |
2043 | if (qc->flags & ATA_QCFLAG_IO || |
2044 | (!(qc->err_mask & AC_ERR_INVALID) && | |
2045 | qc->err_mask != AC_ERR_DEV)) | |
03faab78 TH |
2046 | qc->flags |= ATA_QCFLAG_RETRY; |
2047 | ||
022bdb07 | 2048 | /* accumulate error info */ |
4528e4da | 2049 | ehc->i.dev = qc->dev; |
022bdb07 TH |
2050 | all_err_mask |= qc->err_mask; |
2051 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 2052 | eflags |= ATA_EFLAG_IS_IO; |
022bdb07 TH |
2053 | } |
2054 | ||
a20f33ff | 2055 | /* enforce default EH actions */ |
b51e9e5d | 2056 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 2057 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2058 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2059 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2060 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2061 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2062 | |
dfcc173d TH |
2063 | /* If we have offending qcs and the associated failed device, |
2064 | * perform per-dev EH action only on the offending device. | |
2065 | */ | |
4528e4da | 2066 | if (ehc->i.dev) { |
4528e4da TH |
2067 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2068 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2069 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2070 | } |
2071 | ||
2695e366 TH |
2072 | /* propagate timeout to host link */ |
2073 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2074 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2075 | ||
2076 | /* record error and consider speeding down */ | |
dfcc173d | 2077 | dev = ehc->i.dev; |
2695e366 TH |
2078 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2079 | ata_dev_enabled(link->device)))) | |
2080 | dev = link->device; | |
dfcc173d | 2081 | |
76326ac1 TH |
2082 | if (dev) { |
2083 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2084 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2085 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 2086 | } |
dfcc173d | 2087 | |
022bdb07 TH |
2088 | DPRINTK("EXIT\n"); |
2089 | } | |
2090 | ||
2091 | /** | |
9b1e2658 TH |
2092 | * ata_eh_autopsy - analyze error and determine recovery action |
2093 | * @ap: host port to perform autopsy on | |
2094 | * | |
2095 | * Analyze all links of @ap and determine why they failed and | |
2096 | * which recovery actions are needed. | |
2097 | * | |
2098 | * LOCKING: | |
2099 | * Kernel thread context (may sleep). | |
2100 | */ | |
fb7fd614 | 2101 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2102 | { |
2103 | struct ata_link *link; | |
2104 | ||
1eca4365 | 2105 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2106 | ata_eh_link_autopsy(link); |
2695e366 | 2107 | |
b1c72916 TH |
2108 | /* Handle the frigging slave link. Autopsy is done similarly |
2109 | * but actions and flags are transferred over to the master | |
2110 | * link and handled from there. | |
2111 | */ | |
2112 | if (ap->slave_link) { | |
2113 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2114 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2115 | ||
848e4c68 TH |
2116 | /* transfer control flags from master to slave */ |
2117 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2118 | ||
2119 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2120 | ata_eh_link_autopsy(ap->slave_link); |
2121 | ||
848e4c68 | 2122 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2123 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2124 | mehc->i.action |= sehc->i.action; | |
2125 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2126 | mehc->i.flags |= sehc->i.flags; | |
2127 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2128 | } | |
2129 | ||
2695e366 TH |
2130 | /* Autopsy of fanout ports can affect host link autopsy. |
2131 | * Perform host link autopsy last. | |
2132 | */ | |
071f44b1 | 2133 | if (sata_pmp_attached(ap)) |
2695e366 | 2134 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2135 | } |
2136 | ||
6521148c RH |
2137 | /** |
2138 | * ata_get_cmd_descript - get description for ATA command | |
2139 | * @command: ATA command code to get description for | |
2140 | * | |
2141 | * Return a textual description of the given command, or NULL if the | |
2142 | * command is not known. | |
2143 | * | |
2144 | * LOCKING: | |
2145 | * None | |
2146 | */ | |
2147 | const char *ata_get_cmd_descript(u8 command) | |
2148 | { | |
2149 | #ifdef CONFIG_ATA_VERBOSE_ERROR | |
2150 | static const struct | |
2151 | { | |
2152 | u8 command; | |
2153 | const char *text; | |
2154 | } cmd_descr[] = { | |
2155 | { ATA_CMD_DEV_RESET, "DEVICE RESET" }, | |
2156 | { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, | |
2157 | { ATA_CMD_STANDBY, "STANDBY" }, | |
2158 | { ATA_CMD_IDLE, "IDLE" }, | |
2159 | { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, | |
2160 | { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, | |
2161 | { ATA_CMD_NOP, "NOP" }, | |
2162 | { ATA_CMD_FLUSH, "FLUSH CACHE" }, | |
2163 | { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, | |
2164 | { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" }, | |
2165 | { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, | |
2166 | { ATA_CMD_SERVICE, "SERVICE" }, | |
2167 | { ATA_CMD_READ, "READ DMA" }, | |
2168 | { ATA_CMD_READ_EXT, "READ DMA EXT" }, | |
2169 | { ATA_CMD_READ_QUEUED, "READ DMA QUEUED" }, | |
2170 | { ATA_CMD_READ_STREAM_EXT, "READ STREAM EXT" }, | |
2171 | { ATA_CMD_READ_STREAM_DMA_EXT, "READ STREAM DMA EXT" }, | |
2172 | { ATA_CMD_WRITE, "WRITE DMA" }, | |
2173 | { ATA_CMD_WRITE_EXT, "WRITE DMA EXT" }, | |
2174 | { ATA_CMD_WRITE_QUEUED, "WRITE DMA QUEUED EXT" }, | |
2175 | { ATA_CMD_WRITE_STREAM_EXT, "WRITE STREAM EXT" }, | |
2176 | { ATA_CMD_WRITE_STREAM_DMA_EXT, "WRITE STREAM DMA EXT" }, | |
2177 | { ATA_CMD_WRITE_FUA_EXT, "WRITE DMA FUA EXT" }, | |
2178 | { ATA_CMD_WRITE_QUEUED_FUA_EXT, "WRITE DMA QUEUED FUA EXT" }, | |
2179 | { ATA_CMD_FPDMA_READ, "READ FPDMA QUEUED" }, | |
2180 | { ATA_CMD_FPDMA_WRITE, "WRITE FPDMA QUEUED" }, | |
2181 | { ATA_CMD_PIO_READ, "READ SECTOR(S)" }, | |
2182 | { ATA_CMD_PIO_READ_EXT, "READ SECTOR(S) EXT" }, | |
2183 | { ATA_CMD_PIO_WRITE, "WRITE SECTOR(S)" }, | |
2184 | { ATA_CMD_PIO_WRITE_EXT, "WRITE SECTOR(S) EXT" }, | |
2185 | { ATA_CMD_READ_MULTI, "READ MULTIPLE" }, | |
2186 | { ATA_CMD_READ_MULTI_EXT, "READ MULTIPLE EXT" }, | |
2187 | { ATA_CMD_WRITE_MULTI, "WRITE MULTIPLE" }, | |
2188 | { ATA_CMD_WRITE_MULTI_EXT, "WRITE MULTIPLE EXT" }, | |
2189 | { ATA_CMD_WRITE_MULTI_FUA_EXT, "WRITE MULTIPLE FUA EXT" }, | |
2190 | { ATA_CMD_SET_FEATURES, "SET FEATURES" }, | |
2191 | { ATA_CMD_SET_MULTI, "SET MULTIPLE MODE" }, | |
2192 | { ATA_CMD_VERIFY, "READ VERIFY SECTOR(S)" }, | |
2193 | { ATA_CMD_VERIFY_EXT, "READ VERIFY SECTOR(S) EXT" }, | |
2194 | { ATA_CMD_WRITE_UNCORR_EXT, "WRITE UNCORRECTABLE EXT" }, | |
2195 | { ATA_CMD_STANDBYNOW1, "STANDBY IMMEDIATE" }, | |
2196 | { ATA_CMD_IDLEIMMEDIATE, "IDLE IMMEDIATE" }, | |
2197 | { ATA_CMD_SLEEP, "SLEEP" }, | |
2198 | { ATA_CMD_INIT_DEV_PARAMS, "INITIALIZE DEVICE PARAMETERS" }, | |
2199 | { ATA_CMD_READ_NATIVE_MAX, "READ NATIVE MAX ADDRESS" }, | |
2200 | { ATA_CMD_READ_NATIVE_MAX_EXT, "READ NATIVE MAX ADDRESS EXT" }, | |
2201 | { ATA_CMD_SET_MAX, "SET MAX ADDRESS" }, | |
2202 | { ATA_CMD_SET_MAX_EXT, "SET MAX ADDRESS EXT" }, | |
2203 | { ATA_CMD_READ_LOG_EXT, "READ LOG EXT" }, | |
2204 | { ATA_CMD_WRITE_LOG_EXT, "WRITE LOG EXT" }, | |
2205 | { ATA_CMD_READ_LOG_DMA_EXT, "READ LOG DMA EXT" }, | |
2206 | { ATA_CMD_WRITE_LOG_DMA_EXT, "WRITE LOG DMA EXT" }, | |
2207 | { ATA_CMD_TRUSTED_RCV, "TRUSTED RECEIVE" }, | |
2208 | { ATA_CMD_TRUSTED_RCV_DMA, "TRUSTED RECEIVE DMA" }, | |
2209 | { ATA_CMD_TRUSTED_SND, "TRUSTED SEND" }, | |
2210 | { ATA_CMD_TRUSTED_SND_DMA, "TRUSTED SEND DMA" }, | |
2211 | { ATA_CMD_PMP_READ, "READ BUFFER" }, | |
2212 | { ATA_CMD_PMP_WRITE, "WRITE BUFFER" }, | |
2213 | { ATA_CMD_CONF_OVERLAY, "DEVICE CONFIGURATION OVERLAY" }, | |
2214 | { ATA_CMD_SEC_SET_PASS, "SECURITY SET PASSWORD" }, | |
2215 | { ATA_CMD_SEC_UNLOCK, "SECURITY UNLOCK" }, | |
2216 | { ATA_CMD_SEC_ERASE_PREP, "SECURITY ERASE PREPARE" }, | |
2217 | { ATA_CMD_SEC_ERASE_UNIT, "SECURITY ERASE UNIT" }, | |
2218 | { ATA_CMD_SEC_FREEZE_LOCK, "SECURITY FREEZE LOCK" }, | |
2219 | { ATA_CMD_SEC_DISABLE_PASS, "SECURITY DISABLE PASSWORD" }, | |
2220 | { ATA_CMD_CONFIG_STREAM, "CONFIGURE STREAM" }, | |
2221 | { ATA_CMD_SMART, "SMART" }, | |
2222 | { ATA_CMD_MEDIA_LOCK, "DOOR LOCK" }, | |
2223 | { ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" }, | |
acad7627 | 2224 | { ATA_CMD_DSM, "DATA SET MANAGEMENT" }, |
6521148c RH |
2225 | { ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" }, |
2226 | { ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" }, | |
2227 | { ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" }, | |
2228 | { ATA_CMD_CFA_TRANS_SECT, "CFA TRANSLATE SECTOR" }, | |
2229 | { ATA_CMD_CFA_ERASE, "CFA ERASE SECTORS" }, | |
2230 | { ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" }, | |
2231 | { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, | |
2232 | { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, | |
2233 | { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, | |
2234 | { ATA_CMD_WRITE_LONG_ONCE, "WRITE LONG (without retries)" }, | |
2235 | { ATA_CMD_RESTORE, "RECALIBRATE" }, | |
2236 | { 0, NULL } /* terminate list */ | |
2237 | }; | |
2238 | ||
2239 | unsigned int i; | |
2240 | for (i = 0; cmd_descr[i].text; i++) | |
2241 | if (cmd_descr[i].command == command) | |
2242 | return cmd_descr[i].text; | |
2243 | #endif | |
2244 | ||
2245 | return NULL; | |
2246 | } | |
2247 | ||
9b1e2658 TH |
2248 | /** |
2249 | * ata_eh_link_report - report error handling to user | |
0260731f | 2250 | * @link: ATA link EH is going on |
022bdb07 TH |
2251 | * |
2252 | * Report EH to user. | |
2253 | * | |
2254 | * LOCKING: | |
2255 | * None. | |
2256 | */ | |
9b1e2658 | 2257 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2258 | { |
0260731f TH |
2259 | struct ata_port *ap = link->ap; |
2260 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2261 | const char *frozen, *desc; |
a1e10f7e | 2262 | char tries_buf[6]; |
022bdb07 TH |
2263 | int tag, nr_failed = 0; |
2264 | ||
94ff3d54 TH |
2265 | if (ehc->i.flags & ATA_EHI_QUIET) |
2266 | return; | |
2267 | ||
022bdb07 TH |
2268 | desc = NULL; |
2269 | if (ehc->i.desc[0] != '\0') | |
2270 | desc = ehc->i.desc; | |
2271 | ||
2272 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2273 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2274 | ||
b1c72916 TH |
2275 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2276 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2277 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2278 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2279 | continue; |
2280 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2281 | continue; | |
2282 | ||
2283 | nr_failed++; | |
2284 | } | |
2285 | ||
2286 | if (!nr_failed && !ehc->i.err_mask) | |
2287 | return; | |
2288 | ||
2289 | frozen = ""; | |
b51e9e5d | 2290 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2291 | frozen = " frozen"; |
2292 | ||
a1e10f7e TH |
2293 | memset(tries_buf, 0, sizeof(tries_buf)); |
2294 | if (ap->eh_tries < ATA_EH_MAX_TRIES) | |
2295 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", | |
2296 | ap->eh_tries); | |
2297 | ||
022bdb07 | 2298 | if (ehc->i.dev) { |
e8ee8451 | 2299 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2300 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2301 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2302 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2303 | if (desc) |
b64bbc39 | 2304 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
022bdb07 | 2305 | } else { |
0260731f | 2306 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2307 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2308 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2309 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2310 | if (desc) |
0260731f | 2311 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
022bdb07 TH |
2312 | } |
2313 | ||
6521148c | 2314 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2315 | if (ehc->i.serror) |
da0e21d3 | 2316 | ata_link_printk(link, KERN_ERR, |
1333e194 RH |
2317 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2318 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2319 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2320 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2321 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2322 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2323 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2324 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2325 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2326 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2327 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2328 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2329 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2330 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2331 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2332 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2333 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2334 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
6521148c | 2335 | #endif |
1333e194 | 2336 | |
022bdb07 TH |
2337 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
2338 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 2339 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2340 | const u8 *cdb = qc->cdb; |
2341 | char data_buf[20] = ""; | |
2342 | char cdb_buf[70] = ""; | |
022bdb07 | 2343 | |
0260731f | 2344 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2345 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2346 | continue; |
2347 | ||
abb6a889 TH |
2348 | if (qc->dma_dir != DMA_NONE) { |
2349 | static const char *dma_str[] = { | |
2350 | [DMA_BIDIRECTIONAL] = "bidi", | |
2351 | [DMA_TO_DEVICE] = "out", | |
2352 | [DMA_FROM_DEVICE] = "in", | |
2353 | }; | |
2354 | static const char *prot_str[] = { | |
2355 | [ATA_PROT_PIO] = "pio", | |
2356 | [ATA_PROT_DMA] = "dma", | |
2357 | [ATA_PROT_NCQ] = "ncq", | |
0dc36888 TH |
2358 | [ATAPI_PROT_PIO] = "pio", |
2359 | [ATAPI_PROT_DMA] = "dma", | |
abb6a889 TH |
2360 | }; |
2361 | ||
2362 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", | |
2363 | prot_str[qc->tf.protocol], qc->nbytes, | |
2364 | dma_str[qc->dma_dir]); | |
2365 | } | |
2366 | ||
6521148c RH |
2367 | if (ata_is_atapi(qc->tf.protocol)) { |
2368 | if (qc->scsicmd) | |
2369 | scsi_print_command(qc->scsicmd); | |
2370 | else | |
2371 | snprintf(cdb_buf, sizeof(cdb_buf), | |
abb6a889 TH |
2372 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " |
2373 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", | |
2374 | cdb[0], cdb[1], cdb[2], cdb[3], | |
2375 | cdb[4], cdb[5], cdb[6], cdb[7], | |
2376 | cdb[8], cdb[9], cdb[10], cdb[11], | |
2377 | cdb[12], cdb[13], cdb[14], cdb[15]); | |
6521148c RH |
2378 | } else { |
2379 | const char *descr = ata_get_cmd_descript(cmd->command); | |
2380 | if (descr) | |
2381 | ata_dev_printk(qc->dev, KERN_ERR, | |
2382 | "failed command: %s\n", descr); | |
2383 | } | |
abb6a889 | 2384 | |
8a937581 TH |
2385 | ata_dev_printk(qc->dev, KERN_ERR, |
2386 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " | |
abb6a889 | 2387 | "tag %d%s\n %s" |
8a937581 | 2388 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2389 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2390 | cmd->command, cmd->feature, cmd->nsect, |
2391 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2392 | cmd->hob_feature, cmd->hob_nsect, | |
2393 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2394 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2395 | res->command, res->feature, res->nsect, |
2396 | res->lbal, res->lbam, res->lbah, | |
2397 | res->hob_feature, res->hob_nsect, | |
2398 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2399 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2400 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 | 2401 | |
6521148c | 2402 | #ifdef CONFIG_ATA_VERBOSE_ERROR |
1333e194 | 2403 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | |
2dcb407e | 2404 | ATA_ERR)) { |
1333e194 RH |
2405 | if (res->command & ATA_BUSY) |
2406 | ata_dev_printk(qc->dev, KERN_ERR, | |
2dcb407e | 2407 | "status: { Busy }\n"); |
1333e194 RH |
2408 | else |
2409 | ata_dev_printk(qc->dev, KERN_ERR, | |
2410 | "status: { %s%s%s%s}\n", | |
2411 | res->command & ATA_DRDY ? "DRDY " : "", | |
2412 | res->command & ATA_DF ? "DF " : "", | |
2413 | res->command & ATA_DRQ ? "DRQ " : "", | |
2dcb407e | 2414 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2415 | } |
2416 | ||
2417 | if (cmd->command != ATA_CMD_PACKET && | |
2418 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | | |
2419 | ATA_ABORTED))) | |
2420 | ata_dev_printk(qc->dev, KERN_ERR, | |
2421 | "error: { %s%s%s%s}\n", | |
2422 | res->feature & ATA_ICRC ? "ICRC " : "", | |
2423 | res->feature & ATA_UNC ? "UNC " : "", | |
2424 | res->feature & ATA_IDNF ? "IDNF " : "", | |
2dcb407e | 2425 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
6521148c | 2426 | #endif |
022bdb07 TH |
2427 | } |
2428 | } | |
2429 | ||
9b1e2658 TH |
2430 | /** |
2431 | * ata_eh_report - report error handling to user | |
2432 | * @ap: ATA port to report EH about | |
2433 | * | |
2434 | * Report EH to user. | |
2435 | * | |
2436 | * LOCKING: | |
2437 | * None. | |
2438 | */ | |
fb7fd614 | 2439 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2440 | { |
2441 | struct ata_link *link; | |
2442 | ||
1eca4365 | 2443 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2444 | ata_eh_link_report(link); |
2445 | } | |
2446 | ||
cc0680a5 | 2447 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2448 | unsigned int *classes, unsigned long deadline, |
2449 | bool clear_classes) | |
d87fa38e | 2450 | { |
f58229f8 | 2451 | struct ata_device *dev; |
d87fa38e | 2452 | |
b1c72916 | 2453 | if (clear_classes) |
1eca4365 | 2454 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2455 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2456 | |
f046519f | 2457 | return reset(link, classes, deadline); |
d87fa38e TH |
2458 | } |
2459 | ||
ae791c05 | 2460 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
5dbfc9cb | 2461 | int rc, const unsigned int *classes) |
664faf09 | 2462 | { |
45db2f6c | 2463 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2464 | return 0; |
5dbfc9cb TH |
2465 | if (rc == -EAGAIN) |
2466 | return 1; | |
071f44b1 | 2467 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2468 | return 1; |
664faf09 TH |
2469 | return 0; |
2470 | } | |
2471 | ||
fb7fd614 TH |
2472 | int ata_eh_reset(struct ata_link *link, int classify, |
2473 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2474 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2475 | { |
afaa5c37 | 2476 | struct ata_port *ap = link->ap; |
b1c72916 | 2477 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2478 | struct ata_eh_context *ehc = &link->eh_context; |
705d2014 | 2479 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
664faf09 | 2480 | unsigned int *classes = ehc->classes; |
416dc9ed | 2481 | unsigned int lflags = link->flags; |
1cdaf534 | 2482 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2483 | int max_tries = 0, try = 0; |
b1c72916 | 2484 | struct ata_link *failed_link; |
f58229f8 | 2485 | struct ata_device *dev; |
416dc9ed | 2486 | unsigned long deadline, now; |
022bdb07 | 2487 | ata_reset_fn_t reset; |
afaa5c37 | 2488 | unsigned long flags; |
416dc9ed | 2489 | u32 sstatus; |
b1c72916 | 2490 | int nr_unknown, rc; |
022bdb07 | 2491 | |
932648b0 TH |
2492 | /* |
2493 | * Prepare to reset | |
2494 | */ | |
d8af0eb6 TH |
2495 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2496 | max_tries++; | |
05944bdf TH |
2497 | if (link->flags & ATA_LFLAG_NO_HRST) |
2498 | hardreset = NULL; | |
2499 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2500 | softreset = NULL; | |
d8af0eb6 | 2501 | |
19b72321 TH |
2502 | /* make sure each reset attemp is at least COOL_DOWN apart */ |
2503 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
2504 | now = jiffies; | |
2505 | WARN_ON(time_after(ehc->last_reset, now)); | |
2506 | deadline = ata_deadline(ehc->last_reset, | |
2507 | ATA_EH_RESET_COOL_DOWN); | |
2508 | if (time_before(now, deadline)) | |
2509 | schedule_timeout_uninterruptible(deadline - now); | |
2510 | } | |
0a2c0f56 | 2511 | |
afaa5c37 TH |
2512 | spin_lock_irqsave(ap->lock, flags); |
2513 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2514 | spin_unlock_irqrestore(ap->lock, flags); | |
2515 | ||
cf480626 | 2516 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2517 | |
1eca4365 | 2518 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2519 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2520 | * may change configuration and be in PIO0 timing. If | |
2521 | * we do a hard reset (or are coming from power on) | |
2522 | * this is true for ATA or ATAPI. Until we've set a | |
2523 | * suitable controller mode we should not touch the | |
2524 | * bus as we may be talking too fast. | |
2525 | */ | |
2526 | dev->pio_mode = XFER_PIO_0; | |
2527 | ||
2528 | /* If the controller has a pio mode setup function | |
2529 | * then use it to set the chipset to rights. Don't | |
2530 | * touch the DMA setup as that will be dealt with when | |
2531 | * configuring devices. | |
2532 | */ | |
2533 | if (ap->ops->set_piomode) | |
2534 | ap->ops->set_piomode(ap, dev); | |
2535 | } | |
2536 | ||
cf480626 | 2537 | /* prefer hardreset */ |
932648b0 | 2538 | reset = NULL; |
cf480626 TH |
2539 | ehc->i.action &= ~ATA_EH_RESET; |
2540 | if (hardreset) { | |
2541 | reset = hardreset; | |
a674050e | 2542 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2543 | } else if (softreset) { |
cf480626 | 2544 | reset = softreset; |
a674050e | 2545 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2546 | } |
f5914a46 TH |
2547 | |
2548 | if (prereset) { | |
b1c72916 TH |
2549 | unsigned long deadline = ata_deadline(jiffies, |
2550 | ATA_EH_PRERESET_TIMEOUT); | |
2551 | ||
2552 | if (slave) { | |
2553 | sehc->i.action &= ~ATA_EH_RESET; | |
2554 | sehc->i.action |= ehc->i.action; | |
2555 | } | |
2556 | ||
2557 | rc = prereset(link, deadline); | |
2558 | ||
2559 | /* If present, do prereset on slave link too. Reset | |
2560 | * is skipped iff both master and slave links report | |
2561 | * -ENOENT or clear ATA_EH_RESET. | |
2562 | */ | |
2563 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2564 | int tmp; | |
2565 | ||
2566 | tmp = prereset(slave, deadline); | |
2567 | if (tmp != -ENOENT) | |
2568 | rc = tmp; | |
2569 | ||
2570 | ehc->i.action |= sehc->i.action; | |
2571 | } | |
2572 | ||
f5914a46 | 2573 | if (rc) { |
c961922b | 2574 | if (rc == -ENOENT) { |
cc0680a5 | 2575 | ata_link_printk(link, KERN_DEBUG, |
4aa9ab67 | 2576 | "port disabled. ignoring.\n"); |
cf480626 | 2577 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2578 | |
1eca4365 | 2579 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2580 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2581 | |
2582 | rc = 0; | |
c961922b | 2583 | } else |
cc0680a5 | 2584 | ata_link_printk(link, KERN_ERR, |
f5914a46 | 2585 | "prereset failed (errno=%d)\n", rc); |
fccb6ea5 | 2586 | goto out; |
f5914a46 | 2587 | } |
f5914a46 | 2588 | |
932648b0 | 2589 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2590 | * bang classes, thaw and return. |
932648b0 TH |
2591 | */ |
2592 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2593 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2594 | classes[dev->devno] = ATA_DEV_NONE; |
d6515e6f TH |
2595 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
2596 | ata_is_host_link(link)) | |
2597 | ata_eh_thaw_port(ap); | |
932648b0 TH |
2598 | rc = 0; |
2599 | goto out; | |
2600 | } | |
f5914a46 TH |
2601 | } |
2602 | ||
022bdb07 | 2603 | retry: |
932648b0 TH |
2604 | /* |
2605 | * Perform reset | |
2606 | */ | |
dc98c32c TH |
2607 | if (ata_is_host_link(link)) |
2608 | ata_eh_freeze_port(ap); | |
2609 | ||
341c2c95 | 2610 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2611 | |
932648b0 TH |
2612 | if (reset) { |
2613 | if (verbose) | |
2614 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", | |
2615 | reset == softreset ? "soft" : "hard"); | |
2616 | ||
2617 | /* mark that this EH session started with reset */ | |
19b72321 | 2618 | ehc->last_reset = jiffies; |
932648b0 TH |
2619 | if (reset == hardreset) |
2620 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2621 | else | |
2622 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2623 | |
b1c72916 TH |
2624 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2625 | if (rc && rc != -EAGAIN) { | |
2626 | failed_link = link; | |
5dbfc9cb | 2627 | goto fail; |
b1c72916 TH |
2628 | } |
2629 | ||
2630 | /* hardreset slave link if existent */ | |
2631 | if (slave && reset == hardreset) { | |
2632 | int tmp; | |
2633 | ||
2634 | if (verbose) | |
2635 | ata_link_printk(slave, KERN_INFO, | |
2636 | "hard resetting link\n"); | |
2637 | ||
2638 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2639 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2640 | false); | |
2641 | switch (tmp) { | |
2642 | case -EAGAIN: | |
2643 | rc = -EAGAIN; | |
2644 | case 0: | |
2645 | break; | |
2646 | default: | |
2647 | failed_link = slave; | |
2648 | rc = tmp; | |
2649 | goto fail; | |
2650 | } | |
2651 | } | |
022bdb07 | 2652 | |
b1c72916 | 2653 | /* perform follow-up SRST if necessary */ |
932648b0 | 2654 | if (reset == hardreset && |
5dbfc9cb | 2655 | ata_eh_followup_srst_needed(link, rc, classes)) { |
932648b0 | 2656 | reset = softreset; |
022bdb07 | 2657 | |
932648b0 TH |
2658 | if (!reset) { |
2659 | ata_link_printk(link, KERN_ERR, | |
2660 | "follow-up softreset required " | |
2661 | "but no softreset avaliable\n"); | |
b1c72916 | 2662 | failed_link = link; |
932648b0 TH |
2663 | rc = -EINVAL; |
2664 | goto fail; | |
2665 | } | |
664faf09 | 2666 | |
932648b0 | 2667 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2668 | rc = ata_do_reset(link, reset, classes, deadline, true); |
fe2c4d01 TH |
2669 | if (rc) { |
2670 | failed_link = link; | |
2671 | goto fail; | |
2672 | } | |
664faf09 | 2673 | } |
932648b0 TH |
2674 | } else { |
2675 | if (verbose) | |
2676 | ata_link_printk(link, KERN_INFO, "no reset method " | |
2677 | "available, skipping reset\n"); | |
2678 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) | |
2679 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2680 | } |
2681 | ||
932648b0 TH |
2682 | /* |
2683 | * Post-reset processing | |
2684 | */ | |
1eca4365 | 2685 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2686 | /* After the reset, the device state is PIO 0 and the |
2687 | * controller state is undefined. Reset also wakes up | |
2688 | * drives from sleeping mode. | |
2689 | */ | |
2690 | dev->pio_mode = XFER_PIO_0; | |
2691 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2692 | |
3b761d3d TH |
2693 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
2694 | continue; | |
2695 | ||
2696 | /* apply class override */ | |
2697 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2698 | classes[dev->devno] = ATA_DEV_ATA; | |
2699 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2700 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
022bdb07 TH |
2701 | } |
2702 | ||
416dc9ed TH |
2703 | /* record current link speed */ |
2704 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2705 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2706 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2707 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2708 | |
dc98c32c TH |
2709 | /* thaw the port */ |
2710 | if (ata_is_host_link(link)) | |
2711 | ata_eh_thaw_port(ap); | |
2712 | ||
f046519f TH |
2713 | /* postreset() should clear hardware SError. Although SError |
2714 | * is cleared during link resume, clearing SError here is | |
2715 | * necessary as some PHYs raise hotplug events after SRST. | |
2716 | * This introduces race condition where hotplug occurs between | |
2717 | * reset and here. This race is mediated by cross checking | |
2718 | * link onlineness and classification result later. | |
2719 | */ | |
b1c72916 | 2720 | if (postreset) { |
416dc9ed | 2721 | postreset(link, classes); |
b1c72916 TH |
2722 | if (slave) |
2723 | postreset(slave, classes); | |
2724 | } | |
20952b69 | 2725 | |
1e641060 TH |
2726 | /* |
2727 | * Some controllers can't be frozen very well and may set | |
2728 | * spuruious error conditions during reset. Clear accumulated | |
2729 | * error information. As reset is the final recovery action, | |
2730 | * nothing is lost by doing this. | |
2731 | */ | |
f046519f | 2732 | spin_lock_irqsave(link->ap->lock, flags); |
1e641060 | 2733 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
b1c72916 | 2734 | if (slave) |
1e641060 TH |
2735 | memset(&slave->eh_info, 0, sizeof(link->eh_info)); |
2736 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
f046519f TH |
2737 | spin_unlock_irqrestore(link->ap->lock, flags); |
2738 | ||
3b761d3d TH |
2739 | /* |
2740 | * Make sure onlineness and classification result correspond. | |
f046519f TH |
2741 | * Hotplug could have happened during reset and some |
2742 | * controllers fail to wait while a drive is spinning up after | |
2743 | * being hotplugged causing misdetection. By cross checking | |
3b761d3d TH |
2744 | * link on/offlineness and classification result, those |
2745 | * conditions can be reliably detected and retried. | |
f046519f | 2746 | */ |
b1c72916 | 2747 | nr_unknown = 0; |
1eca4365 | 2748 | ata_for_each_dev(dev, link, ALL) { |
3b761d3d TH |
2749 | if (ata_phys_link_online(ata_dev_phys_link(dev))) { |
2750 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
2751 | ata_dev_printk(dev, KERN_DEBUG, "link online " | |
2752 | "but device misclassifed\n"); | |
2753 | classes[dev->devno] = ATA_DEV_NONE; | |
b1c72916 | 2754 | nr_unknown++; |
3b761d3d TH |
2755 | } |
2756 | } else if (ata_phys_link_offline(ata_dev_phys_link(dev))) { | |
2757 | if (ata_class_enabled(classes[dev->devno])) | |
2758 | ata_dev_printk(dev, KERN_DEBUG, "link offline, " | |
2759 | "clearing class %d to NONE\n", | |
2760 | classes[dev->devno]); | |
2761 | classes[dev->devno] = ATA_DEV_NONE; | |
2762 | } else if (classes[dev->devno] == ATA_DEV_UNKNOWN) { | |
2763 | ata_dev_printk(dev, KERN_DEBUG, "link status unknown, " | |
2764 | "clearing UNKNOWN to NONE\n"); | |
2765 | classes[dev->devno] = ATA_DEV_NONE; | |
b1c72916 | 2766 | } |
f046519f TH |
2767 | } |
2768 | ||
b1c72916 | 2769 | if (classify && nr_unknown) { |
f046519f TH |
2770 | if (try < max_tries) { |
2771 | ata_link_printk(link, KERN_WARNING, "link online but " | |
3b761d3d TH |
2772 | "%d devices misclassified, retrying\n", |
2773 | nr_unknown); | |
b1c72916 | 2774 | failed_link = link; |
f046519f TH |
2775 | rc = -EAGAIN; |
2776 | goto fail; | |
2777 | } | |
2778 | ata_link_printk(link, KERN_WARNING, | |
3b761d3d TH |
2779 | "link online but %d devices misclassified, " |
2780 | "device detection might fail\n", nr_unknown); | |
f046519f TH |
2781 | } |
2782 | ||
416dc9ed | 2783 | /* reset successful, schedule revalidation */ |
cf480626 | 2784 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2785 | if (slave) |
2786 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
6b7ae954 | 2787 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2788 | ehc->i.action |= ATA_EH_REVALIDATE; |
6b7ae954 | 2789 | link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */ |
ae791c05 | 2790 | |
416dc9ed | 2791 | rc = 0; |
fccb6ea5 TH |
2792 | out: |
2793 | /* clear hotplug flag */ | |
2794 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2795 | if (slave) |
2796 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2797 | |
2798 | spin_lock_irqsave(ap->lock, flags); | |
2799 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2800 | spin_unlock_irqrestore(ap->lock, flags); | |
2801 | ||
022bdb07 | 2802 | return rc; |
416dc9ed TH |
2803 | |
2804 | fail: | |
5958e302 TH |
2805 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2806 | if (!ata_is_host_link(link) && | |
2807 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2808 | rc = -ERESTART; | |
2809 | ||
416dc9ed TH |
2810 | if (rc == -ERESTART || try >= max_tries) |
2811 | goto out; | |
2812 | ||
2813 | now = jiffies; | |
2814 | if (time_before(now, deadline)) { | |
2815 | unsigned long delta = deadline - now; | |
2816 | ||
b1c72916 | 2817 | ata_link_printk(failed_link, KERN_WARNING, |
0a2c0f56 TH |
2818 | "reset failed (errno=%d), retrying in %u secs\n", |
2819 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed TH |
2820 | |
2821 | while (delta) | |
2822 | delta = schedule_timeout_uninterruptible(delta); | |
2823 | } | |
2824 | ||
b1c72916 | 2825 | if (try == max_tries - 1) { |
a07d499b | 2826 | sata_down_spd_limit(link, 0); |
b1c72916 | 2827 | if (slave) |
a07d499b | 2828 | sata_down_spd_limit(slave, 0); |
b1c72916 | 2829 | } else if (rc == -EPIPE) |
a07d499b | 2830 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 2831 | |
416dc9ed TH |
2832 | if (hardreset) |
2833 | reset = hardreset; | |
2834 | goto retry; | |
022bdb07 TH |
2835 | } |
2836 | ||
45fabbb7 EO |
2837 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
2838 | { | |
2839 | struct ata_link *link; | |
2840 | struct ata_device *dev; | |
2841 | unsigned long flags; | |
2842 | ||
2843 | /* | |
2844 | * This function can be thought of as an extended version of | |
2845 | * ata_eh_about_to_do() specially crafted to accommodate the | |
2846 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
2847 | * does not leave the do {} while () loop in ata_eh_recover as | |
2848 | * long as the timeout for a park request to *one* device on | |
2849 | * the port has not expired, and since we still want to pick | |
2850 | * up park requests to other devices on the same port or | |
2851 | * timeout updates for the same device, we have to pull | |
2852 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
2853 | * ourselves at the beginning of each pass over the loop. | |
2854 | * | |
2855 | * Additionally, all write accesses to &ap->park_req_pending | |
2856 | * through INIT_COMPLETION() (see below) or complete_all() | |
2857 | * (see ata_scsi_park_store()) are protected by the host lock. | |
2858 | * As a result we have that park_req_pending.done is zero on | |
2859 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
2860 | * *all* devices on port ap have been pulled into the | |
2861 | * respective eh_context structs. If, and only if, | |
2862 | * park_req_pending.done is non-zero by the time we reach | |
2863 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
2864 | * has been scheduled for at least one of the devices on port | |
2865 | * ap and we have to cycle over the do {} while () loop in | |
2866 | * ata_eh_recover() again. | |
2867 | */ | |
2868 | ||
2869 | spin_lock_irqsave(ap->lock, flags); | |
2870 | INIT_COMPLETION(ap->park_req_pending); | |
1eca4365 TH |
2871 | ata_for_each_link(link, ap, EDGE) { |
2872 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
2873 | struct ata_eh_info *ehi = &link->eh_info; |
2874 | ||
2875 | link->eh_context.i.dev_action[dev->devno] |= | |
2876 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
2877 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
2878 | } | |
2879 | } | |
2880 | spin_unlock_irqrestore(ap->lock, flags); | |
2881 | } | |
2882 | ||
2883 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
2884 | { | |
2885 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2886 | struct ata_taskfile tf; | |
2887 | unsigned int err_mask; | |
2888 | ||
2889 | ata_tf_init(dev, &tf); | |
2890 | if (park) { | |
2891 | ehc->unloaded_mask |= 1 << dev->devno; | |
2892 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
2893 | tf.feature = 0x44; | |
2894 | tf.lbal = 0x4c; | |
2895 | tf.lbam = 0x4e; | |
2896 | tf.lbah = 0x55; | |
2897 | } else { | |
2898 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2899 | tf.command = ATA_CMD_CHK_POWER; | |
2900 | } | |
2901 | ||
2902 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
2903 | tf.protocol |= ATA_PROT_NODATA; | |
2904 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
2905 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
2906 | ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); | |
2907 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2908 | } | |
2909 | } | |
2910 | ||
0260731f | 2911 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2912 | struct ata_device **r_failed_dev) |
022bdb07 | 2913 | { |
0260731f TH |
2914 | struct ata_port *ap = link->ap; |
2915 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2916 | struct ata_device *dev; |
8c3c52a8 | 2917 | unsigned int new_mask = 0; |
084fe639 | 2918 | unsigned long flags; |
f58229f8 | 2919 | int rc = 0; |
022bdb07 TH |
2920 | |
2921 | DPRINTK("ENTER\n"); | |
2922 | ||
8c3c52a8 TH |
2923 | /* For PATA drive side cable detection to work, IDENTIFY must |
2924 | * be done backwards such that PDIAG- is released by the slave | |
2925 | * device before the master device is identified. | |
2926 | */ | |
1eca4365 | 2927 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
2928 | unsigned int action = ata_eh_dev_action(dev); |
2929 | unsigned int readid_flags = 0; | |
022bdb07 | 2930 | |
bff04647 TH |
2931 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2932 | readid_flags |= ATA_READID_POSTRESET; | |
2933 | ||
9666f400 | 2934 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2935 | WARN_ON(dev->class == ATA_DEV_PMP); |
2936 | ||
b1c72916 | 2937 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 2938 | rc = -EIO; |
8c3c52a8 | 2939 | goto err; |
022bdb07 TH |
2940 | } |
2941 | ||
0260731f | 2942 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2943 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2944 | readid_flags); | |
022bdb07 | 2945 | if (rc) |
8c3c52a8 | 2946 | goto err; |
022bdb07 | 2947 | |
0260731f | 2948 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2949 | |
baa1e78a TH |
2950 | /* Configuration may have changed, reconfigure |
2951 | * transfer mode. | |
2952 | */ | |
2953 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2954 | ||
3057ac3c | 2955 | /* schedule the scsi_rescan_device() here */ |
ad72cf98 | 2956 | schedule_work(&(ap->scsi_rescan_task)); |
084fe639 TH |
2957 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2958 | ehc->tries[dev->devno] && | |
2959 | ata_class_enabled(ehc->classes[dev->devno])) { | |
842faa6c TH |
2960 | /* Temporarily set dev->class, it will be |
2961 | * permanently set once all configurations are | |
2962 | * complete. This is necessary because new | |
2963 | * device configuration is done in two | |
2964 | * separate loops. | |
2965 | */ | |
084fe639 TH |
2966 | dev->class = ehc->classes[dev->devno]; |
2967 | ||
633273a3 TH |
2968 | if (dev->class == ATA_DEV_PMP) |
2969 | rc = sata_pmp_attach(dev); | |
2970 | else | |
2971 | rc = ata_dev_read_id(dev, &dev->class, | |
2972 | readid_flags, dev->id); | |
842faa6c TH |
2973 | |
2974 | /* read_id might have changed class, store and reset */ | |
2975 | ehc->classes[dev->devno] = dev->class; | |
2976 | dev->class = ATA_DEV_UNKNOWN; | |
2977 | ||
8c3c52a8 TH |
2978 | switch (rc) { |
2979 | case 0: | |
99cf610a TH |
2980 | /* clear error info accumulated during probe */ |
2981 | ata_ering_clear(&dev->ering); | |
f58229f8 | 2982 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2983 | break; |
2984 | case -ENOENT: | |
55a8e2c8 TH |
2985 | /* IDENTIFY was issued to non-existent |
2986 | * device. No need to reset. Just | |
842faa6c | 2987 | * thaw and ignore the device. |
55a8e2c8 TH |
2988 | */ |
2989 | ata_eh_thaw_port(ap); | |
084fe639 | 2990 | break; |
8c3c52a8 | 2991 | default: |
8c3c52a8 | 2992 | goto err; |
084fe639 | 2993 | } |
8c3c52a8 TH |
2994 | } |
2995 | } | |
084fe639 | 2996 | |
c1c4e8d5 | 2997 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
2998 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
2999 | if (ap->ops->cable_detect) | |
3000 | ap->cbl = ap->ops->cable_detect(ap); | |
3001 | ata_force_cbl(ap); | |
3002 | } | |
c1c4e8d5 | 3003 | |
8c3c52a8 TH |
3004 | /* Configure new devices forward such that user doesn't see |
3005 | * device detection messages backwards. | |
3006 | */ | |
1eca4365 | 3007 | ata_for_each_dev(dev, link, ALL) { |
4f7c2874 | 3008 | if (!(new_mask & (1 << dev->devno))) |
8c3c52a8 TH |
3009 | continue; |
3010 | ||
842faa6c TH |
3011 | dev->class = ehc->classes[dev->devno]; |
3012 | ||
4f7c2874 TH |
3013 | if (dev->class == ATA_DEV_PMP) |
3014 | continue; | |
3015 | ||
8c3c52a8 TH |
3016 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
3017 | rc = ata_dev_configure(dev); | |
3018 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
842faa6c TH |
3019 | if (rc) { |
3020 | dev->class = ATA_DEV_UNKNOWN; | |
8c3c52a8 | 3021 | goto err; |
842faa6c | 3022 | } |
8c3c52a8 TH |
3023 | |
3024 | spin_lock_irqsave(ap->lock, flags); | |
3025 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
3026 | spin_unlock_irqrestore(ap->lock, flags); | |
3027 | ||
3028 | /* new device discovered, configure xfermode */ | |
3029 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
3030 | } |
3031 | ||
8c3c52a8 | 3032 | return 0; |
022bdb07 | 3033 | |
8c3c52a8 TH |
3034 | err: |
3035 | *r_failed_dev = dev; | |
3036 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
3037 | return rc; |
3038 | } | |
3039 | ||
6f1d1e3a TH |
3040 | /** |
3041 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
3042 | * @link: link on which timings will be programmed | |
98a1708d | 3043 | * @r_failed_dev: out parameter for failed device |
6f1d1e3a TH |
3044 | * |
3045 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3046 | * ata_set_mode() fails, pointer to the failing device is | |
3047 | * returned in @r_failed_dev. | |
3048 | * | |
3049 | * LOCKING: | |
3050 | * PCI/etc. bus probe sem. | |
3051 | * | |
3052 | * RETURNS: | |
3053 | * 0 on success, negative errno otherwise | |
3054 | */ | |
3055 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
3056 | { | |
3057 | struct ata_port *ap = link->ap; | |
00115e0f TH |
3058 | struct ata_device *dev; |
3059 | int rc; | |
6f1d1e3a | 3060 | |
76326ac1 | 3061 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 3062 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
3063 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
3064 | struct ata_ering_entry *ent; | |
3065 | ||
3066 | ent = ata_ering_top(&dev->ering); | |
3067 | if (ent) | |
3068 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
3069 | } | |
3070 | } | |
3071 | ||
6f1d1e3a TH |
3072 | /* has private set_mode? */ |
3073 | if (ap->ops->set_mode) | |
00115e0f TH |
3074 | rc = ap->ops->set_mode(link, r_failed_dev); |
3075 | else | |
3076 | rc = ata_do_set_mode(link, r_failed_dev); | |
3077 | ||
3078 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 3079 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
3080 | struct ata_eh_context *ehc = &link->eh_context; |
3081 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
3082 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
3083 | ||
3084 | if (dev->xfer_mode != saved_xfer_mode || | |
3085 | ata_ncq_enabled(dev) != saved_ncq) | |
3086 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
3087 | } | |
3088 | ||
3089 | return rc; | |
6f1d1e3a TH |
3090 | } |
3091 | ||
11fc33da TH |
3092 | /** |
3093 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
3094 | * @dev: ATAPI device to clear UA for | |
3095 | * | |
3096 | * Resets and other operations can make an ATAPI device raise | |
3097 | * UNIT ATTENTION which causes the next operation to fail. This | |
3098 | * function clears UA. | |
3099 | * | |
3100 | * LOCKING: | |
3101 | * EH context (may sleep). | |
3102 | * | |
3103 | * RETURNS: | |
3104 | * 0 on success, -errno on failure. | |
3105 | */ | |
3106 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
3107 | { | |
3108 | int i; | |
3109 | ||
3110 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 3111 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
3112 | u8 sense_key = 0; |
3113 | unsigned int err_mask; | |
3114 | ||
3115 | err_mask = atapi_eh_tur(dev, &sense_key); | |
3116 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
3117 | ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " | |
3118 | "failed (err_mask=0x%x)\n", err_mask); | |
3119 | return -EIO; | |
3120 | } | |
3121 | ||
3122 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
3123 | return 0; | |
3124 | ||
3125 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
3126 | if (err_mask) { | |
3127 | ata_dev_printk(dev, KERN_WARNING, "failed to clear " | |
3128 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); | |
3129 | return -EIO; | |
3130 | } | |
3131 | } | |
3132 | ||
3133 | ata_dev_printk(dev, KERN_WARNING, | |
3134 | "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); | |
3135 | ||
3136 | return 0; | |
3137 | } | |
3138 | ||
6013efd8 TH |
3139 | /** |
3140 | * ata_eh_maybe_retry_flush - Retry FLUSH if necessary | |
3141 | * @dev: ATA device which may need FLUSH retry | |
3142 | * | |
3143 | * If @dev failed FLUSH, it needs to be reported upper layer | |
3144 | * immediately as it means that @dev failed to remap and already | |
3145 | * lost at least a sector and further FLUSH retrials won't make | |
3146 | * any difference to the lost sector. However, if FLUSH failed | |
3147 | * for other reasons, for example transmission error, FLUSH needs | |
3148 | * to be retried. | |
3149 | * | |
3150 | * This function determines whether FLUSH failure retry is | |
3151 | * necessary and performs it if so. | |
3152 | * | |
3153 | * RETURNS: | |
3154 | * 0 if EH can continue, -errno if EH needs to be repeated. | |
3155 | */ | |
3156 | static int ata_eh_maybe_retry_flush(struct ata_device *dev) | |
3157 | { | |
3158 | struct ata_link *link = dev->link; | |
3159 | struct ata_port *ap = link->ap; | |
3160 | struct ata_queued_cmd *qc; | |
3161 | struct ata_taskfile tf; | |
3162 | unsigned int err_mask; | |
3163 | int rc = 0; | |
3164 | ||
3165 | /* did flush fail for this device? */ | |
3166 | if (!ata_tag_valid(link->active_tag)) | |
3167 | return 0; | |
3168 | ||
3169 | qc = __ata_qc_from_tag(ap, link->active_tag); | |
3170 | if (qc->dev != dev || (qc->tf.command != ATA_CMD_FLUSH_EXT && | |
3171 | qc->tf.command != ATA_CMD_FLUSH)) | |
3172 | return 0; | |
3173 | ||
3174 | /* if the device failed it, it should be reported to upper layers */ | |
3175 | if (qc->err_mask & AC_ERR_DEV) | |
3176 | return 0; | |
3177 | ||
3178 | /* flush failed for some other reason, give it another shot */ | |
3179 | ata_tf_init(dev, &tf); | |
3180 | ||
3181 | tf.command = qc->tf.command; | |
3182 | tf.flags |= ATA_TFLAG_DEVICE; | |
3183 | tf.protocol = ATA_PROT_NODATA; | |
3184 | ||
3185 | ata_dev_printk(dev, KERN_WARNING, "retrying FLUSH 0x%x Emask 0x%x\n", | |
3186 | tf.command, qc->err_mask); | |
3187 | ||
3188 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
3189 | if (!err_mask) { | |
3190 | /* | |
3191 | * FLUSH is complete but there's no way to | |
3192 | * successfully complete a failed command from EH. | |
3193 | * Making sure retry is allowed at least once and | |
3194 | * retrying it should do the trick - whatever was in | |
3195 | * the cache is already on the platter and this won't | |
3196 | * cause infinite loop. | |
3197 | */ | |
3198 | qc->scsicmd->allowed = max(qc->scsicmd->allowed, 1); | |
3199 | } else { | |
3200 | ata_dev_printk(dev, KERN_WARNING, "FLUSH failed Emask 0x%x\n", | |
3201 | err_mask); | |
3202 | rc = -EIO; | |
3203 | ||
3204 | /* if device failed it, report it to upper layers */ | |
3205 | if (err_mask & AC_ERR_DEV) { | |
3206 | qc->err_mask |= AC_ERR_DEV; | |
3207 | qc->result_tf = tf; | |
3208 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
3209 | rc = 0; | |
3210 | } | |
3211 | } | |
3212 | return rc; | |
3213 | } | |
3214 | ||
6b7ae954 TH |
3215 | /** |
3216 | * ata_eh_set_lpm - configure SATA interface power management | |
3217 | * @link: link to configure power management | |
3218 | * @policy: the link power management policy | |
3219 | * @r_failed_dev: out parameter for failed device | |
3220 | * | |
3221 | * Enable SATA Interface power management. This will enable | |
3222 | * Device Interface Power Management (DIPM) for min_power | |
3223 | * policy, and then call driver specific callbacks for | |
3224 | * enabling Host Initiated Power management. | |
3225 | * | |
3226 | * LOCKING: | |
3227 | * EH context. | |
3228 | * | |
3229 | * RETURNS: | |
3230 | * 0 on success, -errno on failure. | |
3231 | */ | |
3232 | static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
3233 | struct ata_device **r_failed_dev) | |
3234 | { | |
6c8ea89c | 3235 | struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL; |
6b7ae954 TH |
3236 | struct ata_eh_context *ehc = &link->eh_context; |
3237 | struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; | |
3238 | unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; | |
3239 | unsigned int err_mask; | |
3240 | int rc; | |
3241 | ||
3242 | /* if the link or host doesn't do LPM, noop */ | |
3243 | if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) | |
3244 | return 0; | |
3245 | ||
3246 | /* | |
3247 | * DIPM is enabled only for MIN_POWER as some devices | |
3248 | * misbehave when the host NACKs transition to SLUMBER. Order | |
3249 | * device and link configurations such that the host always | |
3250 | * allows DIPM requests. | |
3251 | */ | |
3252 | ata_for_each_dev(dev, link, ENABLED) { | |
3253 | bool hipm = ata_id_has_hipm(dev->id); | |
3254 | bool dipm = ata_id_has_dipm(dev->id); | |
3255 | ||
3256 | /* find the first enabled and LPM enabled devices */ | |
3257 | if (!link_dev) | |
3258 | link_dev = dev; | |
3259 | ||
3260 | if (!lpm_dev && (hipm || dipm)) | |
3261 | lpm_dev = dev; | |
3262 | ||
3263 | hints &= ~ATA_LPM_EMPTY; | |
3264 | if (!hipm) | |
3265 | hints &= ~ATA_LPM_HIPM; | |
3266 | ||
3267 | /* disable DIPM before changing link config */ | |
3268 | if (policy != ATA_LPM_MIN_POWER && dipm) { | |
3269 | err_mask = ata_dev_set_feature(dev, | |
3270 | SETFEATURES_SATA_DISABLE, SATA_DIPM); | |
3271 | if (err_mask && err_mask != AC_ERR_DEV) { | |
3272 | ata_dev_printk(dev, KERN_WARNING, | |
3273 | "failed to disable DIPM, Emask 0x%x\n", | |
3274 | err_mask); | |
3275 | rc = -EIO; | |
3276 | goto fail; | |
3277 | } | |
3278 | } | |
3279 | } | |
3280 | ||
6c8ea89c TH |
3281 | if (ap) { |
3282 | rc = ap->ops->set_lpm(link, policy, hints); | |
3283 | if (!rc && ap->slave_link) | |
3284 | rc = ap->ops->set_lpm(ap->slave_link, policy, hints); | |
3285 | } else | |
3286 | rc = sata_pmp_set_lpm(link, policy, hints); | |
6b7ae954 TH |
3287 | |
3288 | /* | |
3289 | * Attribute link config failure to the first (LPM) enabled | |
3290 | * device on the link. | |
3291 | */ | |
3292 | if (rc) { | |
3293 | if (rc == -EOPNOTSUPP) { | |
3294 | link->flags |= ATA_LFLAG_NO_LPM; | |
3295 | return 0; | |
3296 | } | |
3297 | dev = lpm_dev ? lpm_dev : link_dev; | |
3298 | goto fail; | |
3299 | } | |
3300 | ||
3301 | /* host config updated, enable DIPM if transitioning to MIN_POWER */ | |
3302 | ata_for_each_dev(dev, link, ENABLED) { | |
3303 | if (policy == ATA_LPM_MIN_POWER && ata_id_has_dipm(dev->id)) { | |
3304 | err_mask = ata_dev_set_feature(dev, | |
3305 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
3306 | if (err_mask && err_mask != AC_ERR_DEV) { | |
3307 | ata_dev_printk(dev, KERN_WARNING, | |
3308 | "failed to enable DIPM, Emask 0x%x\n", | |
3309 | err_mask); | |
3310 | rc = -EIO; | |
3311 | goto fail; | |
3312 | } | |
3313 | } | |
3314 | } | |
3315 | ||
3316 | link->lpm_policy = policy; | |
3317 | if (ap && ap->slave_link) | |
3318 | ap->slave_link->lpm_policy = policy; | |
3319 | return 0; | |
3320 | ||
3321 | fail: | |
3322 | /* if no device or only one more chance is left, disable LPM */ | |
3323 | if (!dev || ehc->tries[dev->devno] <= 2) { | |
3324 | ata_link_printk(link, KERN_WARNING, | |
3325 | "disabling LPM on the link\n"); | |
3326 | link->flags |= ATA_LFLAG_NO_LPM; | |
3327 | } | |
3328 | if (r_failed_dev) | |
3329 | *r_failed_dev = dev; | |
3330 | return rc; | |
3331 | } | |
3332 | ||
0260731f | 3333 | static int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 3334 | { |
f58229f8 TH |
3335 | struct ata_device *dev; |
3336 | int cnt = 0; | |
022bdb07 | 3337 | |
1eca4365 TH |
3338 | ata_for_each_dev(dev, link, ENABLED) |
3339 | cnt++; | |
022bdb07 TH |
3340 | return cnt; |
3341 | } | |
3342 | ||
0260731f | 3343 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 3344 | { |
f58229f8 TH |
3345 | struct ata_device *dev; |
3346 | int cnt = 0; | |
084fe639 | 3347 | |
1eca4365 | 3348 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 3349 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
3350 | cnt++; |
3351 | return cnt; | |
3352 | } | |
3353 | ||
0260731f | 3354 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 3355 | { |
672b2d65 | 3356 | struct ata_port *ap = link->ap; |
0260731f | 3357 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 3358 | struct ata_device *dev; |
084fe639 | 3359 | |
f9df58cb TH |
3360 | /* skip disabled links */ |
3361 | if (link->flags & ATA_LFLAG_DISABLED) | |
3362 | return 1; | |
3363 | ||
e2f3d75f TH |
3364 | /* skip if explicitly requested */ |
3365 | if (ehc->i.flags & ATA_EHI_NO_RECOVERY) | |
3366 | return 1; | |
3367 | ||
672b2d65 TH |
3368 | /* thaw frozen port and recover failed devices */ |
3369 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
3370 | return 0; | |
3371 | ||
3372 | /* reset at least once if reset is requested */ | |
3373 | if ((ehc->i.action & ATA_EH_RESET) && | |
3374 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
3375 | return 0; |
3376 | ||
3377 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 3378 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
3379 | if (dev->class == ATA_DEV_UNKNOWN && |
3380 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
3381 | return 0; | |
3382 | } | |
3383 | ||
3384 | return 1; | |
3385 | } | |
3386 | ||
c2c7a89c TH |
3387 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
3388 | { | |
3389 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
3390 | u64 now = get_jiffies_64(); | |
3391 | int *trials = void_arg; | |
3392 | ||
3393 | if (ent->timestamp < now - min(now, interval)) | |
3394 | return -1; | |
3395 | ||
3396 | (*trials)++; | |
3397 | return 0; | |
3398 | } | |
3399 | ||
02c05a27 TH |
3400 | static int ata_eh_schedule_probe(struct ata_device *dev) |
3401 | { | |
3402 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3403 | struct ata_link *link = ata_dev_phys_link(dev); |
3404 | int trials = 0; | |
02c05a27 TH |
3405 | |
3406 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3407 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3408 | return 0; | |
3409 | ||
3410 | ata_eh_detach_dev(dev); | |
3411 | ata_dev_init(dev); | |
3412 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3413 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3414 | ehc->saved_xfer_mode[dev->devno] = 0; |
3415 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3416 | |
6b7ae954 | 3417 | /* the link maybe in a deep sleep, wake it up */ |
6c8ea89c TH |
3418 | if (link->lpm_policy > ATA_LPM_MAX_POWER) { |
3419 | if (ata_is_host_link(link)) | |
3420 | link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER, | |
3421 | ATA_LPM_EMPTY); | |
3422 | else | |
3423 | sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER, | |
3424 | ATA_LPM_EMPTY); | |
3425 | } | |
6b7ae954 | 3426 | |
c2c7a89c TH |
3427 | /* Record and count probe trials on the ering. The specific |
3428 | * error mask used is irrelevant. Because a successful device | |
3429 | * detection clears the ering, this count accumulates only if | |
3430 | * there are consecutive failed probes. | |
3431 | * | |
3432 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3433 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3434 | * forced to 1.5Gbps. | |
3435 | * | |
3436 | * This is to work around cases where failed link speed | |
3437 | * negotiation results in device misdetection leading to | |
3438 | * infinite DEVXCHG or PHRDY CHG events. | |
3439 | */ | |
3440 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3441 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3442 | ||
3443 | if (trials > ATA_EH_PROBE_TRIALS) | |
3444 | sata_down_spd_limit(link, 1); | |
3445 | ||
02c05a27 TH |
3446 | return 1; |
3447 | } | |
3448 | ||
9b1e2658 | 3449 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3450 | { |
9af5c9c9 | 3451 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3452 | |
cf9a590a TH |
3453 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3454 | * The requester is responsible for ensuring forward progress. | |
3455 | */ | |
3456 | if (err != -EAGAIN) | |
3457 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3458 | |
3459 | switch (err) { | |
3460 | case -ENODEV: | |
3461 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3462 | ehc->i.probe_mask |= (1 << dev->devno); | |
3463 | case -EINVAL: | |
3464 | /* give it just one more chance */ | |
3465 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
3466 | case -EIO: | |
d89293ab | 3467 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3468 | /* This is the last chance, better to slow |
3469 | * down than lose it. | |
3470 | */ | |
a07d499b | 3471 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3472 | if (dev->pio_mode > XFER_PIO_0) |
3473 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3474 | } |
3475 | } | |
3476 | ||
3477 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3478 | /* disable device if it has used up all its chances */ | |
3479 | ata_dev_disable(dev); | |
3480 | ||
3481 | /* detach if offline */ | |
b1c72916 | 3482 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3483 | ata_eh_detach_dev(dev); |
3484 | ||
02c05a27 | 3485 | /* schedule probe if necessary */ |
87fbc5a0 | 3486 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3487 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3488 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3489 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3490 | } | |
9b1e2658 TH |
3491 | |
3492 | return 1; | |
fee7ca72 | 3493 | } else { |
cf480626 | 3494 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3495 | return 0; |
fee7ca72 TH |
3496 | } |
3497 | } | |
3498 | ||
022bdb07 TH |
3499 | /** |
3500 | * ata_eh_recover - recover host port after error | |
3501 | * @ap: host port to recover | |
f5914a46 | 3502 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3503 | * @softreset: softreset method (can be NULL) |
3504 | * @hardreset: hardreset method (can be NULL) | |
3505 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3506 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3507 | * |
3508 | * This is the alpha and omega, eum and yang, heart and soul of | |
3509 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3510 | * recover each link and hotplug requests are recorded in the |
3511 | * link's eh_context. This function executes all the operations | |
3512 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3513 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3514 | * |
3515 | * LOCKING: | |
3516 | * Kernel thread context (may sleep). | |
3517 | * | |
3518 | * RETURNS: | |
3519 | * 0 on success, -errno on failure. | |
3520 | */ | |
fb7fd614 TH |
3521 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3522 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3523 | ata_postreset_fn_t postreset, | |
3524 | struct ata_link **r_failed_link) | |
022bdb07 | 3525 | { |
9b1e2658 | 3526 | struct ata_link *link; |
022bdb07 | 3527 | struct ata_device *dev; |
6b7ae954 | 3528 | int rc, nr_fails; |
45fabbb7 | 3529 | unsigned long flags, deadline; |
022bdb07 TH |
3530 | |
3531 | DPRINTK("ENTER\n"); | |
3532 | ||
3533 | /* prep for recovery */ | |
1eca4365 | 3534 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3535 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3536 | |
f9df58cb TH |
3537 | /* re-enable link? */ |
3538 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3539 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3540 | spin_lock_irqsave(ap->lock, flags); | |
3541 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3542 | spin_unlock_irqrestore(ap->lock, flags); | |
3543 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3544 | } | |
3545 | ||
1eca4365 | 3546 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3547 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3548 | ehc->tries[dev->devno] = 1; | |
3549 | else | |
3550 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3551 | |
9b1e2658 TH |
3552 | /* collect port action mask recorded in dev actions */ |
3553 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3554 | ~ATA_EH_PERDEV_MASK; | |
3555 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3556 | ||
3557 | /* process hotplug request */ | |
3558 | if (dev->flags & ATA_DFLAG_DETACH) | |
3559 | ata_eh_detach_dev(dev); | |
3560 | ||
02c05a27 TH |
3561 | /* schedule probe if necessary */ |
3562 | if (!ata_dev_enabled(dev)) | |
3563 | ata_eh_schedule_probe(dev); | |
084fe639 | 3564 | } |
022bdb07 TH |
3565 | } |
3566 | ||
3567 | retry: | |
022bdb07 TH |
3568 | rc = 0; |
3569 | ||
aeb2ecd6 | 3570 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3571 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3572 | goto out; |
3573 | ||
9b1e2658 | 3574 | /* prep for EH */ |
1eca4365 | 3575 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3576 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3577 | |
9b1e2658 TH |
3578 | /* skip EH if possible. */ |
3579 | if (ata_eh_skip_recovery(link)) | |
3580 | ehc->i.action = 0; | |
3581 | ||
1eca4365 | 3582 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3583 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3584 | } | |
084fe639 | 3585 | |
022bdb07 | 3586 | /* reset */ |
1eca4365 | 3587 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3588 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3589 | |
dc98c32c TH |
3590 | if (!(ehc->i.action & ATA_EH_RESET)) |
3591 | continue; | |
9b1e2658 | 3592 | |
dc98c32c TH |
3593 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3594 | prereset, softreset, hardreset, postreset); | |
3595 | if (rc) { | |
3596 | ata_link_printk(link, KERN_ERR, | |
3597 | "reset failed, giving up\n"); | |
3598 | goto out; | |
022bdb07 | 3599 | } |
022bdb07 TH |
3600 | } |
3601 | ||
45fabbb7 EO |
3602 | do { |
3603 | unsigned long now; | |
3604 | ||
3605 | /* | |
3606 | * clears ATA_EH_PARK in eh_info and resets | |
3607 | * ap->park_req_pending | |
3608 | */ | |
3609 | ata_eh_pull_park_action(ap); | |
3610 | ||
3611 | deadline = jiffies; | |
1eca4365 TH |
3612 | ata_for_each_link(link, ap, EDGE) { |
3613 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3614 | struct ata_eh_context *ehc = &link->eh_context; |
3615 | unsigned long tmp; | |
3616 | ||
3617 | if (dev->class != ATA_DEV_ATA) | |
3618 | continue; | |
3619 | if (!(ehc->i.dev_action[dev->devno] & | |
3620 | ATA_EH_PARK)) | |
3621 | continue; | |
3622 | tmp = dev->unpark_deadline; | |
3623 | if (time_before(deadline, tmp)) | |
3624 | deadline = tmp; | |
3625 | else if (time_before_eq(tmp, jiffies)) | |
3626 | continue; | |
3627 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3628 | continue; | |
3629 | ||
3630 | ata_eh_park_issue_cmd(dev, 1); | |
3631 | } | |
3632 | } | |
3633 | ||
3634 | now = jiffies; | |
3635 | if (time_before_eq(deadline, now)) | |
3636 | break; | |
3637 | ||
3638 | deadline = wait_for_completion_timeout(&ap->park_req_pending, | |
3639 | deadline - now); | |
3640 | } while (deadline); | |
1eca4365 TH |
3641 | ata_for_each_link(link, ap, EDGE) { |
3642 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3643 | if (!(link->eh_context.unloaded_mask & |
3644 | (1 << dev->devno))) | |
3645 | continue; | |
3646 | ||
3647 | ata_eh_park_issue_cmd(dev, 0); | |
3648 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3649 | } | |
3650 | } | |
3651 | ||
9b1e2658 | 3652 | /* the rest */ |
6b7ae954 TH |
3653 | nr_fails = 0; |
3654 | ata_for_each_link(link, ap, PMP_FIRST) { | |
9b1e2658 | 3655 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3656 | |
6b7ae954 TH |
3657 | if (sata_pmp_attached(ap) && ata_is_host_link(link)) |
3658 | goto config_lpm; | |
3659 | ||
9b1e2658 TH |
3660 | /* revalidate existing devices and attach new ones */ |
3661 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3662 | if (rc) |
6b7ae954 | 3663 | goto rest_fail; |
022bdb07 | 3664 | |
633273a3 TH |
3665 | /* if PMP got attached, return, pmp EH will take care of it */ |
3666 | if (link->device->class == ATA_DEV_PMP) { | |
3667 | ehc->i.action = 0; | |
3668 | return 0; | |
3669 | } | |
3670 | ||
9b1e2658 TH |
3671 | /* configure transfer mode if necessary */ |
3672 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3673 | rc = ata_set_mode(link, &dev); | |
3674 | if (rc) | |
6b7ae954 | 3675 | goto rest_fail; |
9b1e2658 TH |
3676 | ehc->i.flags &= ~ATA_EHI_SETMODE; |
3677 | } | |
3678 | ||
11fc33da TH |
3679 | /* If reset has been issued, clear UA to avoid |
3680 | * disrupting the current users of the device. | |
3681 | */ | |
3682 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3683 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3684 | if (dev->class != ATA_DEV_ATAPI) |
3685 | continue; | |
3686 | rc = atapi_eh_clear_ua(dev); | |
3687 | if (rc) | |
6b7ae954 | 3688 | goto rest_fail; |
11fc33da TH |
3689 | } |
3690 | } | |
3691 | ||
6013efd8 TH |
3692 | /* retry flush if necessary */ |
3693 | ata_for_each_dev(dev, link, ALL) { | |
3694 | if (dev->class != ATA_DEV_ATA) | |
3695 | continue; | |
3696 | rc = ata_eh_maybe_retry_flush(dev); | |
3697 | if (rc) | |
6b7ae954 | 3698 | goto rest_fail; |
6013efd8 TH |
3699 | } |
3700 | ||
6b7ae954 | 3701 | config_lpm: |
11fc33da | 3702 | /* configure link power saving */ |
6b7ae954 TH |
3703 | if (link->lpm_policy != ap->target_lpm_policy) { |
3704 | rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev); | |
3705 | if (rc) | |
3706 | goto rest_fail; | |
3707 | } | |
ca77329f | 3708 | |
9b1e2658 TH |
3709 | /* this link is okay now */ |
3710 | ehc->i.flags = 0; | |
3711 | continue; | |
022bdb07 | 3712 | |
6b7ae954 TH |
3713 | rest_fail: |
3714 | nr_fails++; | |
3715 | if (dev) | |
3716 | ata_eh_handle_dev_fail(dev, rc); | |
022bdb07 | 3717 | |
b06ce3e5 TH |
3718 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3719 | /* PMP reset requires working host port. | |
3720 | * Can't retry if it's frozen. | |
3721 | */ | |
071f44b1 | 3722 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3723 | goto out; |
9b1e2658 | 3724 | break; |
b06ce3e5 | 3725 | } |
022bdb07 TH |
3726 | } |
3727 | ||
6b7ae954 | 3728 | if (nr_fails) |
9b1e2658 | 3729 | goto retry; |
022bdb07 | 3730 | |
9b1e2658 TH |
3731 | out: |
3732 | if (rc && r_failed_link) | |
3733 | *r_failed_link = link; | |
3734 | ||
022bdb07 TH |
3735 | DPRINTK("EXIT, rc=%d\n", rc); |
3736 | return rc; | |
3737 | } | |
3738 | ||
3739 | /** | |
3740 | * ata_eh_finish - finish up EH | |
3741 | * @ap: host port to finish EH for | |
3742 | * | |
3743 | * Recovery is complete. Clean up EH states and retry or finish | |
3744 | * failed qcs. | |
3745 | * | |
3746 | * LOCKING: | |
3747 | * None. | |
3748 | */ | |
fb7fd614 | 3749 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
3750 | { |
3751 | int tag; | |
3752 | ||
3753 | /* retry or finish qcs */ | |
3754 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
3755 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
3756 | ||
3757 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
3758 | continue; | |
3759 | ||
3760 | if (qc->err_mask) { | |
3761 | /* FIXME: Once EH migration is complete, | |
3762 | * generate sense data in this function, | |
3763 | * considering both err_mask and tf. | |
3764 | */ | |
03faab78 | 3765 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3766 | ata_eh_qc_retry(qc); |
03faab78 TH |
3767 | else |
3768 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3769 | } else { |
3770 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3771 | ata_eh_qc_complete(qc); | |
3772 | } else { | |
3773 | /* feed zero TF to sense generation */ | |
3774 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3775 | ata_eh_qc_retry(qc); | |
3776 | } | |
3777 | } | |
3778 | } | |
da917d69 TH |
3779 | |
3780 | /* make sure nr_active_links is zero after EH */ | |
3781 | WARN_ON(ap->nr_active_links); | |
3782 | ap->nr_active_links = 0; | |
022bdb07 TH |
3783 | } |
3784 | ||
3785 | /** | |
3786 | * ata_do_eh - do standard error handling | |
3787 | * @ap: host port to handle error for | |
a1efdaba | 3788 | * |
f5914a46 | 3789 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3790 | * @softreset: softreset method (can be NULL) |
3791 | * @hardreset: hardreset method (can be NULL) | |
3792 | * @postreset: postreset method (can be NULL) | |
3793 | * | |
3794 | * Perform standard error handling sequence. | |
3795 | * | |
3796 | * LOCKING: | |
3797 | * Kernel thread context (may sleep). | |
3798 | */ | |
f5914a46 TH |
3799 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3800 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3801 | ata_postreset_fn_t postreset) | |
022bdb07 | 3802 | { |
9b1e2658 TH |
3803 | struct ata_device *dev; |
3804 | int rc; | |
3805 | ||
3806 | ata_eh_autopsy(ap); | |
3807 | ata_eh_report(ap); | |
3808 | ||
3809 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3810 | NULL); | |
3811 | if (rc) { | |
1eca4365 | 3812 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
3813 | ata_dev_disable(dev); |
3814 | } | |
3815 | ||
022bdb07 TH |
3816 | ata_eh_finish(ap); |
3817 | } | |
500530f6 | 3818 | |
a1efdaba TH |
3819 | /** |
3820 | * ata_std_error_handler - standard error handler | |
3821 | * @ap: host port to handle error for | |
3822 | * | |
3823 | * Standard error handler | |
3824 | * | |
3825 | * LOCKING: | |
3826 | * Kernel thread context (may sleep). | |
3827 | */ | |
3828 | void ata_std_error_handler(struct ata_port *ap) | |
3829 | { | |
3830 | struct ata_port_operations *ops = ap->ops; | |
3831 | ata_reset_fn_t hardreset = ops->hardreset; | |
3832 | ||
57c9efdf | 3833 | /* ignore built-in hardreset if SCR access is not available */ |
fe06e5f9 | 3834 | if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) |
a1efdaba TH |
3835 | hardreset = NULL; |
3836 | ||
3837 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
3838 | } | |
3839 | ||
6ffa01d8 | 3840 | #ifdef CONFIG_PM |
500530f6 TH |
3841 | /** |
3842 | * ata_eh_handle_port_suspend - perform port suspend operation | |
3843 | * @ap: port to suspend | |
3844 | * | |
3845 | * Suspend @ap. | |
3846 | * | |
3847 | * LOCKING: | |
3848 | * Kernel thread context (may sleep). | |
3849 | */ | |
3850 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
3851 | { | |
3852 | unsigned long flags; | |
3853 | int rc = 0; | |
3854 | ||
3855 | /* are we suspending? */ | |
3856 | spin_lock_irqsave(ap->lock, flags); | |
3857 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3858 | ap->pm_mesg.event == PM_EVENT_ON) { | |
3859 | spin_unlock_irqrestore(ap->lock, flags); | |
3860 | return; | |
3861 | } | |
3862 | spin_unlock_irqrestore(ap->lock, flags); | |
3863 | ||
3864 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
3865 | ||
64578a3d TH |
3866 | /* tell ACPI we're suspending */ |
3867 | rc = ata_acpi_on_suspend(ap); | |
3868 | if (rc) | |
3869 | goto out; | |
3870 | ||
500530f6 TH |
3871 | /* suspend */ |
3872 | ata_eh_freeze_port(ap); | |
3873 | ||
3874 | if (ap->ops->port_suspend) | |
3875 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
3876 | ||
bd3adca5 | 3877 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
64578a3d | 3878 | out: |
500530f6 TH |
3879 | /* report result */ |
3880 | spin_lock_irqsave(ap->lock, flags); | |
3881 | ||
3882 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
3883 | if (rc == 0) | |
3884 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 3885 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
3886 | ata_port_schedule_eh(ap); |
3887 | ||
3888 | if (ap->pm_result) { | |
3889 | *ap->pm_result = rc; | |
3890 | ap->pm_result = NULL; | |
3891 | } | |
3892 | ||
3893 | spin_unlock_irqrestore(ap->lock, flags); | |
3894 | ||
3895 | return; | |
3896 | } | |
3897 | ||
3898 | /** | |
3899 | * ata_eh_handle_port_resume - perform port resume operation | |
3900 | * @ap: port to resume | |
3901 | * | |
3902 | * Resume @ap. | |
3903 | * | |
500530f6 TH |
3904 | * LOCKING: |
3905 | * Kernel thread context (may sleep). | |
3906 | */ | |
3907 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
3908 | { | |
6f9c1ea2 TH |
3909 | struct ata_link *link; |
3910 | struct ata_device *dev; | |
500530f6 | 3911 | unsigned long flags; |
9666f400 | 3912 | int rc = 0; |
500530f6 TH |
3913 | |
3914 | /* are we resuming? */ | |
3915 | spin_lock_irqsave(ap->lock, flags); | |
3916 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3917 | ap->pm_mesg.event != PM_EVENT_ON) { | |
3918 | spin_unlock_irqrestore(ap->lock, flags); | |
3919 | return; | |
3920 | } | |
3921 | spin_unlock_irqrestore(ap->lock, flags); | |
3922 | ||
9666f400 | 3923 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 3924 | |
6f9c1ea2 TH |
3925 | /* |
3926 | * Error timestamps are in jiffies which doesn't run while | |
3927 | * suspended and PHY events during resume isn't too uncommon. | |
3928 | * When the two are combined, it can lead to unnecessary speed | |
3929 | * downs if the machine is suspended and resumed repeatedly. | |
3930 | * Clear error history. | |
3931 | */ | |
3932 | ata_for_each_link(link, ap, HOST_FIRST) | |
3933 | ata_for_each_dev(dev, link, ALL) | |
3934 | ata_ering_clear(&dev->ering); | |
3935 | ||
bd3adca5 SL |
3936 | ata_acpi_set_state(ap, PMSG_ON); |
3937 | ||
500530f6 TH |
3938 | if (ap->ops->port_resume) |
3939 | rc = ap->ops->port_resume(ap); | |
3940 | ||
6746544c TH |
3941 | /* tell ACPI that we're resuming */ |
3942 | ata_acpi_on_resume(ap); | |
3943 | ||
9666f400 | 3944 | /* report result */ |
500530f6 TH |
3945 | spin_lock_irqsave(ap->lock, flags); |
3946 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
3947 | if (ap->pm_result) { | |
3948 | *ap->pm_result = rc; | |
3949 | ap->pm_result = NULL; | |
3950 | } | |
3951 | spin_unlock_irqrestore(ap->lock, flags); | |
3952 | } | |
6ffa01d8 | 3953 | #endif /* CONFIG_PM */ |