Commit | Line | Data |
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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> | |
c6fd2807 | 43 | #include "../scsi/scsi_transport_api.h" |
ece1d636 TH |
44 | |
45 | #include <linux/libata.h> | |
46 | ||
47 | #include "libata.h" | |
48 | ||
7d47e8d4 | 49 | enum { |
3884f7b0 | 50 | /* speed down verdicts */ |
7d47e8d4 TH |
51 | ATA_EH_SPDN_NCQ_OFF = (1 << 0), |
52 | ATA_EH_SPDN_SPEED_DOWN = (1 << 1), | |
53 | ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), | |
76326ac1 | 54 | ATA_EH_SPDN_KEEP_ERRORS = (1 << 3), |
3884f7b0 TH |
55 | |
56 | /* error flags */ | |
57 | ATA_EFLAG_IS_IO = (1 << 0), | |
76326ac1 | 58 | ATA_EFLAG_DUBIOUS_XFER = (1 << 1), |
3884f7b0 TH |
59 | |
60 | /* error categories */ | |
61 | ATA_ECAT_NONE = 0, | |
62 | ATA_ECAT_ATA_BUS = 1, | |
63 | ATA_ECAT_TOUT_HSM = 2, | |
64 | ATA_ECAT_UNK_DEV = 3, | |
75f9cafc TH |
65 | ATA_ECAT_DUBIOUS_NONE = 4, |
66 | ATA_ECAT_DUBIOUS_ATA_BUS = 5, | |
67 | ATA_ECAT_DUBIOUS_TOUT_HSM = 6, | |
68 | ATA_ECAT_DUBIOUS_UNK_DEV = 7, | |
69 | ATA_ECAT_NR = 8, | |
7d47e8d4 | 70 | |
87fbc5a0 TH |
71 | ATA_EH_CMD_DFL_TIMEOUT = 5000, |
72 | ||
0a2c0f56 TH |
73 | /* always put at least this amount of time between resets */ |
74 | ATA_EH_RESET_COOL_DOWN = 5000, | |
75 | ||
341c2c95 TH |
76 | /* Waiting in ->prereset can never be reliable. It's |
77 | * sometimes nice to wait there but it can't be depended upon; | |
78 | * otherwise, we wouldn't be resetting. Just give it enough | |
79 | * time for most drives to spin up. | |
80 | */ | |
81 | ATA_EH_PRERESET_TIMEOUT = 10000, | |
82 | ATA_EH_FASTDRAIN_INTERVAL = 3000, | |
11fc33da TH |
83 | |
84 | ATA_EH_UA_TRIES = 5, | |
c2c7a89c TH |
85 | |
86 | /* probe speed down parameters, see ata_eh_schedule_probe() */ | |
87 | ATA_EH_PROBE_TRIAL_INTERVAL = 60000, /* 1 min */ | |
88 | ATA_EH_PROBE_TRIALS = 2, | |
31daabda TH |
89 | }; |
90 | ||
91 | /* The following table determines how we sequence resets. Each entry | |
92 | * represents timeout for that try. The first try can be soft or | |
93 | * hardreset. All others are hardreset if available. In most cases | |
94 | * the first reset w/ 10sec timeout should succeed. Following entries | |
95 | * are mostly for error handling, hotplug and retarded devices. | |
96 | */ | |
97 | static const unsigned long ata_eh_reset_timeouts[] = { | |
341c2c95 TH |
98 | 10000, /* most drives spin up by 10sec */ |
99 | 10000, /* > 99% working drives spin up before 20sec */ | |
100 | 35000, /* give > 30 secs of idleness for retarded devices */ | |
101 | 5000, /* and sweet one last chance */ | |
d8af0eb6 | 102 | ULONG_MAX, /* > 1 min has elapsed, give up */ |
31daabda TH |
103 | }; |
104 | ||
87fbc5a0 TH |
105 | static const unsigned long ata_eh_identify_timeouts[] = { |
106 | 5000, /* covers > 99% of successes and not too boring on failures */ | |
107 | 10000, /* combined time till here is enough even for media access */ | |
108 | 30000, /* for true idiots */ | |
109 | ULONG_MAX, | |
110 | }; | |
111 | ||
112 | static const unsigned long ata_eh_other_timeouts[] = { | |
113 | 5000, /* same rationale as identify timeout */ | |
114 | 10000, /* ditto */ | |
115 | /* but no merciful 30sec for other commands, it just isn't worth it */ | |
116 | ULONG_MAX, | |
117 | }; | |
118 | ||
119 | struct ata_eh_cmd_timeout_ent { | |
120 | const u8 *commands; | |
121 | const unsigned long *timeouts; | |
122 | }; | |
123 | ||
124 | /* The following table determines timeouts to use for EH internal | |
125 | * commands. Each table entry is a command class and matches the | |
126 | * commands the entry applies to and the timeout table to use. | |
127 | * | |
128 | * On the retry after a command timed out, the next timeout value from | |
129 | * the table is used. If the table doesn't contain further entries, | |
130 | * the last value is used. | |
131 | * | |
132 | * ehc->cmd_timeout_idx keeps track of which timeout to use per | |
133 | * command class, so if SET_FEATURES times out on the first try, the | |
134 | * next try will use the second timeout value only for that class. | |
135 | */ | |
136 | #define CMDS(cmds...) (const u8 []){ cmds, 0 } | |
137 | static const struct ata_eh_cmd_timeout_ent | |
138 | ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { | |
139 | { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI), | |
140 | .timeouts = ata_eh_identify_timeouts, }, | |
141 | { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT), | |
142 | .timeouts = ata_eh_other_timeouts, }, | |
143 | { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT), | |
144 | .timeouts = ata_eh_other_timeouts, }, | |
145 | { .commands = CMDS(ATA_CMD_SET_FEATURES), | |
146 | .timeouts = ata_eh_other_timeouts, }, | |
147 | { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS), | |
148 | .timeouts = ata_eh_other_timeouts, }, | |
149 | }; | |
150 | #undef CMDS | |
151 | ||
ad9e2762 | 152 | static void __ata_port_freeze(struct ata_port *ap); |
6ffa01d8 | 153 | #ifdef CONFIG_PM |
500530f6 TH |
154 | static void ata_eh_handle_port_suspend(struct ata_port *ap); |
155 | static void ata_eh_handle_port_resume(struct ata_port *ap); | |
6ffa01d8 TH |
156 | #else /* CONFIG_PM */ |
157 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
158 | { } | |
159 | ||
160 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
161 | { } | |
6ffa01d8 | 162 | #endif /* CONFIG_PM */ |
ad9e2762 | 163 | |
b64bbc39 TH |
164 | static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt, |
165 | va_list args) | |
166 | { | |
167 | ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len, | |
168 | ATA_EH_DESC_LEN - ehi->desc_len, | |
169 | fmt, args); | |
170 | } | |
171 | ||
172 | /** | |
173 | * __ata_ehi_push_desc - push error description without adding separator | |
174 | * @ehi: target EHI | |
175 | * @fmt: printf format string | |
176 | * | |
177 | * Format string according to @fmt and append it to @ehi->desc. | |
178 | * | |
179 | * LOCKING: | |
180 | * spin_lock_irqsave(host lock) | |
181 | */ | |
182 | void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
183 | { | |
184 | va_list args; | |
185 | ||
186 | va_start(args, fmt); | |
187 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
188 | va_end(args); | |
189 | } | |
190 | ||
191 | /** | |
192 | * ata_ehi_push_desc - push error description with separator | |
193 | * @ehi: target EHI | |
194 | * @fmt: printf format string | |
195 | * | |
196 | * Format string according to @fmt and append it to @ehi->desc. | |
197 | * If @ehi->desc is not empty, ", " is added in-between. | |
198 | * | |
199 | * LOCKING: | |
200 | * spin_lock_irqsave(host lock) | |
201 | */ | |
202 | void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) | |
203 | { | |
204 | va_list args; | |
205 | ||
206 | if (ehi->desc_len) | |
207 | __ata_ehi_push_desc(ehi, ", "); | |
208 | ||
209 | va_start(args, fmt); | |
210 | __ata_ehi_pushv_desc(ehi, fmt, args); | |
211 | va_end(args); | |
212 | } | |
213 | ||
214 | /** | |
215 | * ata_ehi_clear_desc - clean error description | |
216 | * @ehi: target EHI | |
217 | * | |
218 | * Clear @ehi->desc. | |
219 | * | |
220 | * LOCKING: | |
221 | * spin_lock_irqsave(host lock) | |
222 | */ | |
223 | void ata_ehi_clear_desc(struct ata_eh_info *ehi) | |
224 | { | |
225 | ehi->desc[0] = '\0'; | |
226 | ehi->desc_len = 0; | |
227 | } | |
228 | ||
cbcdd875 TH |
229 | /** |
230 | * ata_port_desc - append port description | |
231 | * @ap: target ATA port | |
232 | * @fmt: printf format string | |
233 | * | |
234 | * Format string according to @fmt and append it to port | |
235 | * description. If port description is not empty, " " is added | |
236 | * in-between. This function is to be used while initializing | |
237 | * ata_host. The description is printed on host registration. | |
238 | * | |
239 | * LOCKING: | |
240 | * None. | |
241 | */ | |
242 | void ata_port_desc(struct ata_port *ap, const char *fmt, ...) | |
243 | { | |
244 | va_list args; | |
245 | ||
246 | WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING)); | |
247 | ||
248 | if (ap->link.eh_info.desc_len) | |
249 | __ata_ehi_push_desc(&ap->link.eh_info, " "); | |
250 | ||
251 | va_start(args, fmt); | |
252 | __ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args); | |
253 | va_end(args); | |
254 | } | |
255 | ||
256 | #ifdef CONFIG_PCI | |
257 | ||
258 | /** | |
259 | * ata_port_pbar_desc - append PCI BAR description | |
260 | * @ap: target ATA port | |
261 | * @bar: target PCI BAR | |
262 | * @offset: offset into PCI BAR | |
263 | * @name: name of the area | |
264 | * | |
265 | * If @offset is negative, this function formats a string which | |
266 | * contains the name, address, size and type of the BAR and | |
267 | * appends it to the port description. If @offset is zero or | |
268 | * positive, only name and offsetted address is appended. | |
269 | * | |
270 | * LOCKING: | |
271 | * None. | |
272 | */ | |
273 | void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, | |
274 | const char *name) | |
275 | { | |
276 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
277 | char *type = ""; | |
278 | unsigned long long start, len; | |
279 | ||
280 | if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) | |
281 | type = "m"; | |
282 | else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) | |
283 | type = "i"; | |
284 | ||
285 | start = (unsigned long long)pci_resource_start(pdev, bar); | |
286 | len = (unsigned long long)pci_resource_len(pdev, bar); | |
287 | ||
288 | if (offset < 0) | |
289 | ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start); | |
290 | else | |
e6a73ab1 AM |
291 | ata_port_desc(ap, "%s 0x%llx", name, |
292 | start + (unsigned long long)offset); | |
cbcdd875 TH |
293 | } |
294 | ||
295 | #endif /* CONFIG_PCI */ | |
296 | ||
87fbc5a0 TH |
297 | static int ata_lookup_timeout_table(u8 cmd) |
298 | { | |
299 | int i; | |
300 | ||
301 | for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) { | |
302 | const u8 *cur; | |
303 | ||
304 | for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++) | |
305 | if (*cur == cmd) | |
306 | return i; | |
307 | } | |
308 | ||
309 | return -1; | |
310 | } | |
311 | ||
312 | /** | |
313 | * ata_internal_cmd_timeout - determine timeout for an internal command | |
314 | * @dev: target device | |
315 | * @cmd: internal command to be issued | |
316 | * | |
317 | * Determine timeout for internal command @cmd for @dev. | |
318 | * | |
319 | * LOCKING: | |
320 | * EH context. | |
321 | * | |
322 | * RETURNS: | |
323 | * Determined timeout. | |
324 | */ | |
325 | unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd) | |
326 | { | |
327 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
328 | int ent = ata_lookup_timeout_table(cmd); | |
329 | int idx; | |
330 | ||
331 | if (ent < 0) | |
332 | return ATA_EH_CMD_DFL_TIMEOUT; | |
333 | ||
334 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
335 | return ata_eh_cmd_timeout_table[ent].timeouts[idx]; | |
336 | } | |
337 | ||
338 | /** | |
339 | * ata_internal_cmd_timed_out - notification for internal command timeout | |
340 | * @dev: target device | |
341 | * @cmd: internal command which timed out | |
342 | * | |
343 | * Notify EH that internal command @cmd for @dev timed out. This | |
344 | * function should be called only for commands whose timeouts are | |
345 | * determined using ata_internal_cmd_timeout(). | |
346 | * | |
347 | * LOCKING: | |
348 | * EH context. | |
349 | */ | |
350 | void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd) | |
351 | { | |
352 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
353 | int ent = ata_lookup_timeout_table(cmd); | |
354 | int idx; | |
355 | ||
356 | if (ent < 0) | |
357 | return; | |
358 | ||
359 | idx = ehc->cmd_timeout_idx[dev->devno][ent]; | |
360 | if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX) | |
361 | ehc->cmd_timeout_idx[dev->devno][ent]++; | |
362 | } | |
363 | ||
3884f7b0 | 364 | static void ata_ering_record(struct ata_ering *ering, unsigned int eflags, |
0c247c55 TH |
365 | unsigned int err_mask) |
366 | { | |
367 | struct ata_ering_entry *ent; | |
368 | ||
369 | WARN_ON(!err_mask); | |
370 | ||
371 | ering->cursor++; | |
372 | ering->cursor %= ATA_ERING_SIZE; | |
373 | ||
374 | ent = &ering->ring[ering->cursor]; | |
3884f7b0 | 375 | ent->eflags = eflags; |
0c247c55 TH |
376 | ent->err_mask = err_mask; |
377 | ent->timestamp = get_jiffies_64(); | |
378 | } | |
379 | ||
76326ac1 TH |
380 | static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering) |
381 | { | |
382 | struct ata_ering_entry *ent = &ering->ring[ering->cursor]; | |
383 | ||
384 | if (ent->err_mask) | |
385 | return ent; | |
386 | return NULL; | |
387 | } | |
388 | ||
7d47e8d4 | 389 | static void ata_ering_clear(struct ata_ering *ering) |
0c247c55 | 390 | { |
7d47e8d4 | 391 | memset(ering, 0, sizeof(*ering)); |
0c247c55 TH |
392 | } |
393 | ||
394 | static int ata_ering_map(struct ata_ering *ering, | |
395 | int (*map_fn)(struct ata_ering_entry *, void *), | |
396 | void *arg) | |
397 | { | |
398 | int idx, rc = 0; | |
399 | struct ata_ering_entry *ent; | |
400 | ||
401 | idx = ering->cursor; | |
402 | do { | |
403 | ent = &ering->ring[idx]; | |
404 | if (!ent->err_mask) | |
405 | break; | |
406 | rc = map_fn(ent, arg); | |
407 | if (rc) | |
408 | break; | |
409 | idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; | |
410 | } while (idx != ering->cursor); | |
411 | ||
412 | return rc; | |
413 | } | |
414 | ||
64f65ca6 TH |
415 | static unsigned int ata_eh_dev_action(struct ata_device *dev) |
416 | { | |
9af5c9c9 | 417 | struct ata_eh_context *ehc = &dev->link->eh_context; |
64f65ca6 TH |
418 | |
419 | return ehc->i.action | ehc->i.dev_action[dev->devno]; | |
420 | } | |
421 | ||
f58229f8 | 422 | static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev, |
af181c2d TH |
423 | struct ata_eh_info *ehi, unsigned int action) |
424 | { | |
f58229f8 | 425 | struct ata_device *tdev; |
af181c2d TH |
426 | |
427 | if (!dev) { | |
428 | ehi->action &= ~action; | |
1eca4365 | 429 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 | 430 | ehi->dev_action[tdev->devno] &= ~action; |
af181c2d TH |
431 | } else { |
432 | /* doesn't make sense for port-wide EH actions */ | |
433 | WARN_ON(!(action & ATA_EH_PERDEV_MASK)); | |
434 | ||
435 | /* break ehi->action into ehi->dev_action */ | |
436 | if (ehi->action & action) { | |
1eca4365 | 437 | ata_for_each_dev(tdev, link, ALL) |
f58229f8 TH |
438 | ehi->dev_action[tdev->devno] |= |
439 | ehi->action & action; | |
af181c2d TH |
440 | ehi->action &= ~action; |
441 | } | |
442 | ||
443 | /* turn off the specified per-dev action */ | |
444 | ehi->dev_action[dev->devno] &= ~action; | |
445 | } | |
446 | } | |
447 | ||
ece1d636 TH |
448 | /** |
449 | * ata_scsi_timed_out - SCSI layer time out callback | |
450 | * @cmd: timed out SCSI command | |
451 | * | |
452 | * Handles SCSI layer timeout. We race with normal completion of | |
453 | * the qc for @cmd. If the qc is already gone, we lose and let | |
454 | * the scsi command finish (EH_HANDLED). Otherwise, the qc has | |
455 | * timed out and EH should be invoked. Prevent ata_qc_complete() | |
456 | * from finishing it by setting EH_SCHEDULED and return | |
457 | * EH_NOT_HANDLED. | |
458 | * | |
ad9e2762 TH |
459 | * TODO: kill this function once old EH is gone. |
460 | * | |
ece1d636 TH |
461 | * LOCKING: |
462 | * Called from timer context | |
463 | * | |
464 | * RETURNS: | |
465 | * EH_HANDLED or EH_NOT_HANDLED | |
466 | */ | |
242f9dcb | 467 | enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) |
ece1d636 TH |
468 | { |
469 | struct Scsi_Host *host = cmd->device->host; | |
35bb94b1 | 470 | struct ata_port *ap = ata_shost_to_port(host); |
ece1d636 TH |
471 | unsigned long flags; |
472 | struct ata_queued_cmd *qc; | |
242f9dcb | 473 | enum blk_eh_timer_return ret; |
ece1d636 TH |
474 | |
475 | DPRINTK("ENTER\n"); | |
476 | ||
ad9e2762 | 477 | if (ap->ops->error_handler) { |
242f9dcb | 478 | ret = BLK_EH_NOT_HANDLED; |
ad9e2762 TH |
479 | goto out; |
480 | } | |
481 | ||
242f9dcb | 482 | ret = BLK_EH_HANDLED; |
ba6a1308 | 483 | spin_lock_irqsave(ap->lock, flags); |
9af5c9c9 | 484 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
ece1d636 TH |
485 | if (qc) { |
486 | WARN_ON(qc->scsicmd != cmd); | |
487 | qc->flags |= ATA_QCFLAG_EH_SCHEDULED; | |
488 | qc->err_mask |= AC_ERR_TIMEOUT; | |
242f9dcb | 489 | ret = BLK_EH_NOT_HANDLED; |
ece1d636 | 490 | } |
ba6a1308 | 491 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 | 492 | |
ad9e2762 | 493 | out: |
ece1d636 TH |
494 | DPRINTK("EXIT, ret=%d\n", ret); |
495 | return ret; | |
496 | } | |
497 | ||
ece180d1 TH |
498 | static void ata_eh_unload(struct ata_port *ap) |
499 | { | |
500 | struct ata_link *link; | |
501 | struct ata_device *dev; | |
502 | unsigned long flags; | |
503 | ||
504 | /* Restore SControl IPM and SPD for the next driver and | |
505 | * disable attached devices. | |
506 | */ | |
507 | ata_for_each_link(link, ap, PMP_FIRST) { | |
508 | sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); | |
509 | ata_for_each_dev(dev, link, ALL) | |
510 | ata_dev_disable(dev); | |
511 | } | |
512 | ||
513 | /* freeze and set UNLOADED */ | |
514 | spin_lock_irqsave(ap->lock, flags); | |
515 | ||
516 | ata_port_freeze(ap); /* won't be thawed */ | |
517 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; /* clear pending from freeze */ | |
518 | ap->pflags |= ATA_PFLAG_UNLOADED; | |
519 | ||
520 | spin_unlock_irqrestore(ap->lock, flags); | |
521 | } | |
522 | ||
ece1d636 TH |
523 | /** |
524 | * ata_scsi_error - SCSI layer error handler callback | |
525 | * @host: SCSI host on which error occurred | |
526 | * | |
527 | * Handles SCSI-layer-thrown error events. | |
528 | * | |
529 | * LOCKING: | |
530 | * Inherited from SCSI layer (none, can sleep) | |
531 | * | |
532 | * RETURNS: | |
533 | * Zero. | |
534 | */ | |
381544bb | 535 | void ata_scsi_error(struct Scsi_Host *host) |
ece1d636 | 536 | { |
35bb94b1 | 537 | struct ata_port *ap = ata_shost_to_port(host); |
a1e10f7e | 538 | int i; |
ad9e2762 | 539 | unsigned long flags; |
ece1d636 TH |
540 | |
541 | DPRINTK("ENTER\n"); | |
542 | ||
ad9e2762 | 543 | /* synchronize with port task */ |
ece1d636 TH |
544 | ata_port_flush_task(ap); |
545 | ||
cca3974e | 546 | /* synchronize with host lock and sort out timeouts */ |
ad9e2762 TH |
547 | |
548 | /* For new EH, all qcs are finished in one of three ways - | |
549 | * normal completion, error completion, and SCSI timeout. | |
550 | * Both cmpletions can race against SCSI timeout. When normal | |
551 | * completion wins, the qc never reaches EH. When error | |
552 | * completion wins, the qc has ATA_QCFLAG_FAILED set. | |
553 | * | |
554 | * When SCSI timeout wins, things are a bit more complex. | |
555 | * Normal or error completion can occur after the timeout but | |
556 | * before this point. In such cases, both types of | |
557 | * completions are honored. A scmd is determined to have | |
558 | * timed out iff its associated qc is active and not failed. | |
559 | */ | |
560 | if (ap->ops->error_handler) { | |
561 | struct scsi_cmnd *scmd, *tmp; | |
562 | int nr_timedout = 0; | |
563 | ||
e30349d2 | 564 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 TH |
565 | |
566 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { | |
567 | struct ata_queued_cmd *qc; | |
568 | ||
569 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
570 | qc = __ata_qc_from_tag(ap, i); | |
571 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
572 | qc->scsicmd == scmd) | |
573 | break; | |
574 | } | |
575 | ||
576 | if (i < ATA_MAX_QUEUE) { | |
577 | /* the scmd has an associated qc */ | |
578 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
579 | /* which hasn't failed yet, timeout */ | |
580 | qc->err_mask |= AC_ERR_TIMEOUT; | |
581 | qc->flags |= ATA_QCFLAG_FAILED; | |
582 | nr_timedout++; | |
583 | } | |
584 | } else { | |
585 | /* Normal completion occurred after | |
586 | * SCSI timeout but before this point. | |
587 | * Successfully complete it. | |
588 | */ | |
589 | scmd->retries = scmd->allowed; | |
590 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
591 | } | |
592 | } | |
593 | ||
594 | /* If we have timed out qcs. They belong to EH from | |
595 | * this point but the state of the controller is | |
596 | * unknown. Freeze the port to make sure the IRQ | |
597 | * handler doesn't diddle with those qcs. This must | |
598 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
599 | */ | |
600 | if (nr_timedout) | |
601 | __ata_port_freeze(ap); | |
602 | ||
e30349d2 | 603 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
604 | |
605 | /* initialize eh_tries */ | |
606 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 607 | } else |
e30349d2 | 608 | spin_unlock_wait(ap->lock); |
ad9e2762 TH |
609 | |
610 | repeat: | |
611 | /* invoke error handler */ | |
612 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
613 | struct ata_link *link; |
614 | ||
5ddf24c5 TH |
615 | /* kill fast drain timer */ |
616 | del_timer_sync(&ap->fastdrain_timer); | |
617 | ||
500530f6 TH |
618 | /* process port resume request */ |
619 | ata_eh_handle_port_resume(ap); | |
620 | ||
f3e81b19 | 621 | /* fetch & clear EH info */ |
e30349d2 | 622 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 623 | |
1eca4365 | 624 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
625 | struct ata_eh_context *ehc = &link->eh_context; |
626 | struct ata_device *dev; | |
627 | ||
cf1b86c8 TH |
628 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
629 | link->eh_context.i = link->eh_info; | |
630 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 631 | |
1eca4365 | 632 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
633 | int devno = dev->devno; |
634 | ||
635 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
636 | if (ata_ncq_enabled(dev)) | |
637 | ehc->saved_ncq_enabled |= 1 << devno; | |
638 | } | |
cf1b86c8 | 639 | } |
f3e81b19 | 640 | |
b51e9e5d TH |
641 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
642 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 643 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 644 | |
e30349d2 | 645 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 646 | |
500530f6 TH |
647 | /* invoke EH, skip if unloading or suspended */ |
648 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 649 | ap->ops->error_handler(ap); |
ece180d1 TH |
650 | else { |
651 | /* if unloading, commence suicide */ | |
652 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
653 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
654 | ata_eh_unload(ap); | |
720ba126 | 655 | ata_eh_finish(ap); |
ece180d1 | 656 | } |
ad9e2762 | 657 | |
500530f6 TH |
658 | /* process port suspend request */ |
659 | ata_eh_handle_port_suspend(ap); | |
660 | ||
ad9e2762 TH |
661 | /* Exception might have happend after ->error_handler |
662 | * recovered the port but before this point. Repeat | |
663 | * EH in such case. | |
664 | */ | |
e30349d2 | 665 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 666 | |
b51e9e5d | 667 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 668 | if (--ap->eh_tries) { |
e30349d2 | 669 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
670 | goto repeat; |
671 | } | |
672 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " | |
a1e10f7e | 673 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
914616a3 | 674 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
675 | } |
676 | ||
f3e81b19 | 677 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 678 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 679 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 680 | |
e30349d2 | 681 | /* Clear host_eh_scheduled while holding ap->lock such |
ad9e2762 TH |
682 | * that if exception occurs after this point but |
683 | * before EH completion, SCSI midlayer will | |
684 | * re-initiate EH. | |
685 | */ | |
686 | host->host_eh_scheduled = 0; | |
687 | ||
e30349d2 | 688 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 689 | } else { |
9af5c9c9 | 690 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
691 | ap->ops->eng_timeout(ap); |
692 | } | |
ece1d636 | 693 | |
ad9e2762 | 694 | /* finish or retry handled scmd's and clean up */ |
ece1d636 TH |
695 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
696 | ||
697 | scsi_eh_flush_done_q(&ap->eh_done_q); | |
698 | ||
ad9e2762 | 699 | /* clean up */ |
e30349d2 | 700 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 701 | |
1cdaf534 | 702 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 703 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 704 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
52bad64d | 705 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, 0); |
1cdaf534 TH |
706 | |
707 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
708 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); | |
580b2102 | 709 | |
b51e9e5d | 710 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 711 | |
c6cf9e99 | 712 | /* tell wait_eh that we're done */ |
b51e9e5d | 713 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
714 | wake_up_all(&ap->eh_wait_q); |
715 | ||
e30349d2 | 716 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 717 | |
ece1d636 | 718 | DPRINTK("EXIT\n"); |
ece1d636 TH |
719 | } |
720 | ||
c6cf9e99 TH |
721 | /** |
722 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
723 | * @ap: Port to wait EH for | |
724 | * | |
725 | * Wait until the currently pending EH is complete. | |
726 | * | |
727 | * LOCKING: | |
728 | * Kernel thread context (may sleep). | |
729 | */ | |
730 | void ata_port_wait_eh(struct ata_port *ap) | |
731 | { | |
732 | unsigned long flags; | |
733 | DEFINE_WAIT(wait); | |
734 | ||
735 | retry: | |
ba6a1308 | 736 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 737 | |
b51e9e5d | 738 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 739 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 740 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 741 | schedule(); |
ba6a1308 | 742 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 743 | } |
0a1b622e | 744 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 745 | |
ba6a1308 | 746 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
747 | |
748 | /* make sure SCSI EH is complete */ | |
cca3974e | 749 | if (scsi_host_in_recovery(ap->scsi_host)) { |
c6cf9e99 TH |
750 | msleep(10); |
751 | goto retry; | |
752 | } | |
753 | } | |
754 | ||
5ddf24c5 TH |
755 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
756 | { | |
757 | unsigned int tag; | |
758 | int nr = 0; | |
759 | ||
760 | /* count only non-internal commands */ | |
761 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
762 | if (ata_qc_from_tag(ap, tag)) | |
763 | nr++; | |
764 | ||
765 | return nr; | |
766 | } | |
767 | ||
768 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
769 | { | |
770 | struct ata_port *ap = (void *)arg; | |
771 | unsigned long flags; | |
772 | int cnt; | |
773 | ||
774 | spin_lock_irqsave(ap->lock, flags); | |
775 | ||
776 | cnt = ata_eh_nr_in_flight(ap); | |
777 | ||
778 | /* are we done? */ | |
779 | if (!cnt) | |
780 | goto out_unlock; | |
781 | ||
782 | if (cnt == ap->fastdrain_cnt) { | |
783 | unsigned int tag; | |
784 | ||
785 | /* No progress during the last interval, tag all | |
786 | * in-flight qcs as timed out and freeze the port. | |
787 | */ | |
788 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
789 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
790 | if (qc) | |
791 | qc->err_mask |= AC_ERR_TIMEOUT; | |
792 | } | |
793 | ||
794 | ata_port_freeze(ap); | |
795 | } else { | |
796 | /* some qcs have finished, give it another chance */ | |
797 | ap->fastdrain_cnt = cnt; | |
798 | ap->fastdrain_timer.expires = | |
341c2c95 | 799 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
800 | add_timer(&ap->fastdrain_timer); |
801 | } | |
802 | ||
803 | out_unlock: | |
804 | spin_unlock_irqrestore(ap->lock, flags); | |
805 | } | |
806 | ||
807 | /** | |
808 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
809 | * @ap: target ATA port | |
810 | * @fastdrain: activate fast drain | |
811 | * | |
812 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
813 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
814 | * that EH kicks in in timely manner. | |
815 | * | |
816 | * LOCKING: | |
817 | * spin_lock_irqsave(host lock) | |
818 | */ | |
819 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
820 | { | |
821 | int cnt; | |
822 | ||
823 | /* already scheduled? */ | |
824 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
825 | return; | |
826 | ||
827 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
828 | ||
829 | if (!fastdrain) | |
830 | return; | |
831 | ||
832 | /* do we have in-flight qcs? */ | |
833 | cnt = ata_eh_nr_in_flight(ap); | |
834 | if (!cnt) | |
835 | return; | |
836 | ||
837 | /* activate fast drain */ | |
838 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
839 | ap->fastdrain_timer.expires = |
840 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
841 | add_timer(&ap->fastdrain_timer); |
842 | } | |
843 | ||
f686bcb8 TH |
844 | /** |
845 | * ata_qc_schedule_eh - schedule qc for error handling | |
846 | * @qc: command to schedule error handling for | |
847 | * | |
848 | * Schedule error handling for @qc. EH will kick in as soon as | |
849 | * other commands are drained. | |
850 | * | |
851 | * LOCKING: | |
cca3974e | 852 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
853 | */ |
854 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
855 | { | |
856 | struct ata_port *ap = qc->ap; | |
857 | ||
858 | WARN_ON(!ap->ops->error_handler); | |
859 | ||
860 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 861 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
862 | |
863 | /* The following will fail if timeout has already expired. | |
864 | * ata_scsi_error() takes care of such scmds on EH entry. | |
865 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
866 | * this function completes. | |
867 | */ | |
242f9dcb | 868 | blk_abort_request(qc->scsicmd->request); |
f686bcb8 TH |
869 | } |
870 | ||
7b70fc03 TH |
871 | /** |
872 | * ata_port_schedule_eh - schedule error handling without a qc | |
873 | * @ap: ATA port to schedule EH for | |
874 | * | |
875 | * Schedule error handling for @ap. EH will kick in as soon as | |
876 | * all commands are drained. | |
877 | * | |
878 | * LOCKING: | |
cca3974e | 879 | * spin_lock_irqsave(host lock) |
7b70fc03 TH |
880 | */ |
881 | void ata_port_schedule_eh(struct ata_port *ap) | |
882 | { | |
883 | WARN_ON(!ap->ops->error_handler); | |
884 | ||
f4d6d004 TH |
885 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
886 | return; | |
887 | ||
5ddf24c5 | 888 | ata_eh_set_pending(ap, 1); |
cca3974e | 889 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
890 | |
891 | DPRINTK("port EH scheduled\n"); | |
892 | } | |
893 | ||
dbd82616 | 894 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
895 | { |
896 | int tag, nr_aborted = 0; | |
897 | ||
898 | WARN_ON(!ap->ops->error_handler); | |
899 | ||
5ddf24c5 TH |
900 | /* we're gonna abort all commands, no need for fast drain */ |
901 | ata_eh_set_pending(ap, 0); | |
902 | ||
7b70fc03 TH |
903 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
904 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
905 | ||
dbd82616 | 906 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
907 | qc->flags |= ATA_QCFLAG_FAILED; |
908 | ata_qc_complete(qc); | |
909 | nr_aborted++; | |
910 | } | |
911 | } | |
912 | ||
913 | if (!nr_aborted) | |
914 | ata_port_schedule_eh(ap); | |
915 | ||
916 | return nr_aborted; | |
917 | } | |
918 | ||
dbd82616 TH |
919 | /** |
920 | * ata_link_abort - abort all qc's on the link | |
921 | * @link: ATA link to abort qc's for | |
922 | * | |
923 | * Abort all active qc's active on @link and schedule EH. | |
924 | * | |
925 | * LOCKING: | |
926 | * spin_lock_irqsave(host lock) | |
927 | * | |
928 | * RETURNS: | |
929 | * Number of aborted qc's. | |
930 | */ | |
931 | int ata_link_abort(struct ata_link *link) | |
932 | { | |
933 | return ata_do_link_abort(link->ap, link); | |
934 | } | |
935 | ||
936 | /** | |
937 | * ata_port_abort - abort all qc's on the port | |
938 | * @ap: ATA port to abort qc's for | |
939 | * | |
940 | * Abort all active qc's of @ap and schedule EH. | |
941 | * | |
942 | * LOCKING: | |
943 | * spin_lock_irqsave(host_set lock) | |
944 | * | |
945 | * RETURNS: | |
946 | * Number of aborted qc's. | |
947 | */ | |
948 | int ata_port_abort(struct ata_port *ap) | |
949 | { | |
950 | return ata_do_link_abort(ap, NULL); | |
951 | } | |
952 | ||
e3180499 TH |
953 | /** |
954 | * __ata_port_freeze - freeze port | |
955 | * @ap: ATA port to freeze | |
956 | * | |
957 | * This function is called when HSM violation or some other | |
958 | * condition disrupts normal operation of the port. Frozen port | |
959 | * is not allowed to perform any operation until the port is | |
960 | * thawed, which usually follows a successful reset. | |
961 | * | |
962 | * ap->ops->freeze() callback can be used for freezing the port | |
963 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
964 | * port cannot be frozen hardware-wise, the interrupt handler | |
965 | * must ack and clear interrupts unconditionally while the port | |
966 | * is frozen. | |
967 | * | |
968 | * LOCKING: | |
cca3974e | 969 | * spin_lock_irqsave(host lock) |
e3180499 TH |
970 | */ |
971 | static void __ata_port_freeze(struct ata_port *ap) | |
972 | { | |
973 | WARN_ON(!ap->ops->error_handler); | |
974 | ||
975 | if (ap->ops->freeze) | |
976 | ap->ops->freeze(ap); | |
977 | ||
b51e9e5d | 978 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 979 | |
44877b4e | 980 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
981 | } |
982 | ||
983 | /** | |
984 | * ata_port_freeze - abort & freeze port | |
985 | * @ap: ATA port to freeze | |
986 | * | |
987 | * Abort and freeze @ap. | |
988 | * | |
989 | * LOCKING: | |
cca3974e | 990 | * spin_lock_irqsave(host lock) |
e3180499 TH |
991 | * |
992 | * RETURNS: | |
993 | * Number of aborted commands. | |
994 | */ | |
995 | int ata_port_freeze(struct ata_port *ap) | |
996 | { | |
997 | int nr_aborted; | |
998 | ||
999 | WARN_ON(!ap->ops->error_handler); | |
1000 | ||
1001 | nr_aborted = ata_port_abort(ap); | |
1002 | __ata_port_freeze(ap); | |
1003 | ||
1004 | return nr_aborted; | |
1005 | } | |
1006 | ||
7d77b247 TH |
1007 | /** |
1008 | * sata_async_notification - SATA async notification handler | |
1009 | * @ap: ATA port where async notification is received | |
1010 | * | |
1011 | * Handler to be called when async notification via SDB FIS is | |
1012 | * received. This function schedules EH if necessary. | |
1013 | * | |
1014 | * LOCKING: | |
1015 | * spin_lock_irqsave(host lock) | |
1016 | * | |
1017 | * RETURNS: | |
1018 | * 1 if EH is scheduled, 0 otherwise. | |
1019 | */ | |
1020 | int sata_async_notification(struct ata_port *ap) | |
1021 | { | |
1022 | u32 sntf; | |
1023 | int rc; | |
1024 | ||
1025 | if (!(ap->flags & ATA_FLAG_AN)) | |
1026 | return 0; | |
1027 | ||
1028 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
1029 | if (rc == 0) | |
1030 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1031 | ||
071f44b1 | 1032 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1033 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1034 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1035 | /* PMP is not attached. Check whether ATAPI |
1036 | * AN is configured. If so, notify media | |
1037 | * change. | |
1038 | */ | |
1039 | struct ata_device *dev = ap->link.device; | |
1040 | ||
1041 | if ((dev->class == ATA_DEV_ATAPI) && | |
1042 | (dev->flags & ATA_DFLAG_AN)) | |
1043 | ata_scsi_media_change_notify(dev); | |
1044 | return 0; | |
1045 | } else { | |
1046 | /* PMP is attached but SNTF is not available. | |
1047 | * ATAPI async media change notification is | |
1048 | * not used. The PMP must be reporting PHY | |
1049 | * status change, schedule EH. | |
1050 | */ | |
1051 | ata_port_schedule_eh(ap); | |
1052 | return 1; | |
1053 | } | |
1054 | } else { | |
1055 | /* PMP is attached and SNTF is available */ | |
1056 | struct ata_link *link; | |
1057 | ||
1058 | /* check and notify ATAPI AN */ | |
1eca4365 | 1059 | ata_for_each_link(link, ap, EDGE) { |
7d77b247 TH |
1060 | if (!(sntf & (1 << link->pmp))) |
1061 | continue; | |
1062 | ||
1063 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1064 | (link->device->flags & ATA_DFLAG_AN)) | |
1065 | ata_scsi_media_change_notify(link->device); | |
1066 | } | |
1067 | ||
1068 | /* If PMP is reporting that PHY status of some | |
1069 | * downstream ports has changed, schedule EH. | |
1070 | */ | |
1071 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1072 | ata_port_schedule_eh(ap); | |
1073 | return 1; | |
1074 | } | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | } | |
1079 | ||
e3180499 TH |
1080 | /** |
1081 | * ata_eh_freeze_port - EH helper to freeze port | |
1082 | * @ap: ATA port to freeze | |
1083 | * | |
1084 | * Freeze @ap. | |
1085 | * | |
1086 | * LOCKING: | |
1087 | * None. | |
1088 | */ | |
1089 | void ata_eh_freeze_port(struct ata_port *ap) | |
1090 | { | |
1091 | unsigned long flags; | |
1092 | ||
1093 | if (!ap->ops->error_handler) | |
1094 | return; | |
1095 | ||
ba6a1308 | 1096 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1097 | __ata_port_freeze(ap); |
ba6a1308 | 1098 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1099 | } |
1100 | ||
1101 | /** | |
1102 | * ata_port_thaw_port - EH helper to thaw port | |
1103 | * @ap: ATA port to thaw | |
1104 | * | |
1105 | * Thaw frozen port @ap. | |
1106 | * | |
1107 | * LOCKING: | |
1108 | * None. | |
1109 | */ | |
1110 | void ata_eh_thaw_port(struct ata_port *ap) | |
1111 | { | |
1112 | unsigned long flags; | |
1113 | ||
1114 | if (!ap->ops->error_handler) | |
1115 | return; | |
1116 | ||
ba6a1308 | 1117 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1118 | |
b51e9e5d | 1119 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1120 | |
1121 | if (ap->ops->thaw) | |
1122 | ap->ops->thaw(ap); | |
1123 | ||
ba6a1308 | 1124 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1125 | |
44877b4e | 1126 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1127 | } |
1128 | ||
ece1d636 TH |
1129 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1130 | { | |
1131 | /* nada */ | |
1132 | } | |
1133 | ||
1134 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1135 | { | |
1136 | struct ata_port *ap = qc->ap; | |
1137 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1138 | unsigned long flags; | |
1139 | ||
ba6a1308 | 1140 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1141 | qc->scsidone = ata_eh_scsidone; |
1142 | __ata_qc_complete(qc); | |
1143 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1144 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1145 | |
1146 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1147 | } | |
1148 | ||
1149 | /** | |
1150 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1151 | * @qc: Command to complete | |
1152 | * | |
1153 | * Indicate to the mid and upper layers that an ATA command has | |
1154 | * completed. To be used from EH. | |
1155 | */ | |
1156 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1157 | { | |
1158 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1159 | scmd->retries = scmd->allowed; | |
1160 | __ata_eh_qc_complete(qc); | |
1161 | } | |
1162 | ||
1163 | /** | |
1164 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1165 | * @qc: Command to retry | |
1166 | * | |
1167 | * Indicate to the mid and upper layers that an ATA command | |
1168 | * should be retried. To be used from EH. | |
1169 | * | |
1170 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
1171 | * scmd->retries is decremented for commands which get retried | |
1172 | * due to unrelated failures (qc->err_mask is zero). | |
1173 | */ | |
1174 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1175 | { | |
1176 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1177 | if (!qc->err_mask && scmd->retries) | |
1178 | scmd->retries--; | |
1179 | __ata_eh_qc_complete(qc); | |
1180 | } | |
022bdb07 | 1181 | |
678afac6 TH |
1182 | /** |
1183 | * ata_dev_disable - disable ATA device | |
1184 | * @dev: ATA device to disable | |
1185 | * | |
1186 | * Disable @dev. | |
1187 | * | |
1188 | * Locking: | |
1189 | * EH context. | |
1190 | */ | |
1191 | void ata_dev_disable(struct ata_device *dev) | |
1192 | { | |
1193 | if (!ata_dev_enabled(dev)) | |
1194 | return; | |
1195 | ||
1196 | if (ata_msg_drv(dev->link->ap)) | |
1197 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); | |
1198 | ata_acpi_on_disable(dev); | |
1199 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1200 | dev->class++; | |
99cf610a TH |
1201 | |
1202 | /* From now till the next successful probe, ering is used to | |
1203 | * track probe failures. Clear accumulated device error info. | |
1204 | */ | |
1205 | ata_ering_clear(&dev->ering); | |
678afac6 TH |
1206 | } |
1207 | ||
0ea035a3 TH |
1208 | /** |
1209 | * ata_eh_detach_dev - detach ATA device | |
1210 | * @dev: ATA device to detach | |
1211 | * | |
1212 | * Detach @dev. | |
1213 | * | |
1214 | * LOCKING: | |
1215 | * None. | |
1216 | */ | |
fb7fd614 | 1217 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1218 | { |
f58229f8 TH |
1219 | struct ata_link *link = dev->link; |
1220 | struct ata_port *ap = link->ap; | |
90484ebf | 1221 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1222 | unsigned long flags; |
1223 | ||
1224 | ata_dev_disable(dev); | |
1225 | ||
ba6a1308 | 1226 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1227 | |
1228 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1229 | ||
1230 | if (ata_scsi_offline_dev(dev)) { | |
1231 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1232 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1233 | } |
1234 | ||
90484ebf | 1235 | /* clear per-dev EH info */ |
f58229f8 TH |
1236 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1237 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1238 | ehc->saved_xfer_mode[dev->devno] = 0; |
1239 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1240 | |
ba6a1308 | 1241 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1242 | } |
1243 | ||
022bdb07 TH |
1244 | /** |
1245 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1246 | * @link: target ATA link |
47005f25 | 1247 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1248 | * @action: action about to be performed |
1249 | * | |
1250 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1251 | * in @link->eh_info such that eh actions are not unnecessarily |
1252 | * repeated. | |
022bdb07 TH |
1253 | * |
1254 | * LOCKING: | |
1255 | * None. | |
1256 | */ | |
fb7fd614 TH |
1257 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1258 | unsigned int action) | |
022bdb07 | 1259 | { |
955e57df TH |
1260 | struct ata_port *ap = link->ap; |
1261 | struct ata_eh_info *ehi = &link->eh_info; | |
1262 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1263 | unsigned long flags; |
1264 | ||
ba6a1308 | 1265 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1266 | |
955e57df | 1267 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1268 | |
a568d1d2 TH |
1269 | /* About to take EH action, set RECOVERED. Ignore actions on |
1270 | * slave links as master will do them again. | |
1271 | */ | |
1272 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1273 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1274 | ||
ba6a1308 | 1275 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1276 | } |
1277 | ||
47005f25 TH |
1278 | /** |
1279 | * ata_eh_done - EH action complete | |
955e57df | 1280 | * @ap: target ATA port |
47005f25 TH |
1281 | * @dev: target ATA dev for per-dev action (can be NULL) |
1282 | * @action: action just completed | |
1283 | * | |
1284 | * Called right after performing EH actions to clear related bits | |
955e57df | 1285 | * in @link->eh_context. |
47005f25 TH |
1286 | * |
1287 | * LOCKING: | |
1288 | * None. | |
1289 | */ | |
fb7fd614 TH |
1290 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1291 | unsigned int action) | |
47005f25 | 1292 | { |
955e57df | 1293 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1294 | |
955e57df | 1295 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1296 | } |
1297 | ||
022bdb07 TH |
1298 | /** |
1299 | * ata_err_string - convert err_mask to descriptive string | |
1300 | * @err_mask: error mask to convert to string | |
1301 | * | |
1302 | * Convert @err_mask to descriptive string. Errors are | |
1303 | * prioritized according to severity and only the most severe | |
1304 | * error is reported. | |
1305 | * | |
1306 | * LOCKING: | |
1307 | * None. | |
1308 | * | |
1309 | * RETURNS: | |
1310 | * Descriptive string for @err_mask | |
1311 | */ | |
2dcb407e | 1312 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1313 | { |
1314 | if (err_mask & AC_ERR_HOST_BUS) | |
1315 | return "host bus error"; | |
1316 | if (err_mask & AC_ERR_ATA_BUS) | |
1317 | return "ATA bus error"; | |
1318 | if (err_mask & AC_ERR_TIMEOUT) | |
1319 | return "timeout"; | |
1320 | if (err_mask & AC_ERR_HSM) | |
1321 | return "HSM violation"; | |
1322 | if (err_mask & AC_ERR_SYSTEM) | |
1323 | return "internal error"; | |
1324 | if (err_mask & AC_ERR_MEDIA) | |
1325 | return "media error"; | |
1326 | if (err_mask & AC_ERR_INVALID) | |
1327 | return "invalid argument"; | |
1328 | if (err_mask & AC_ERR_DEV) | |
1329 | return "device error"; | |
1330 | return "unknown error"; | |
1331 | } | |
1332 | ||
e8ee8451 TH |
1333 | /** |
1334 | * ata_read_log_page - read a specific log page | |
1335 | * @dev: target device | |
1336 | * @page: page to read | |
1337 | * @buf: buffer to store read page | |
1338 | * @sectors: number of sectors to read | |
1339 | * | |
1340 | * Read log page using READ_LOG_EXT command. | |
1341 | * | |
1342 | * LOCKING: | |
1343 | * Kernel thread context (may sleep). | |
1344 | * | |
1345 | * RETURNS: | |
1346 | * 0 on success, AC_ERR_* mask otherwise. | |
1347 | */ | |
1348 | static unsigned int ata_read_log_page(struct ata_device *dev, | |
1349 | u8 page, void *buf, unsigned int sectors) | |
1350 | { | |
1351 | struct ata_taskfile tf; | |
1352 | unsigned int err_mask; | |
1353 | ||
1354 | DPRINTK("read log page - page %d\n", page); | |
1355 | ||
1356 | ata_tf_init(dev, &tf); | |
1357 | tf.command = ATA_CMD_READ_LOG_EXT; | |
1358 | tf.lbal = page; | |
1359 | tf.nsect = sectors; | |
1360 | tf.hob_nsect = sectors >> 8; | |
1361 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
1362 | tf.protocol = ATA_PROT_PIO; | |
1363 | ||
1364 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1365 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 TH |
1366 | |
1367 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
1368 | return err_mask; | |
1369 | } | |
1370 | ||
1371 | /** | |
1372 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1373 | * @dev: Device to read log page 10h from | |
1374 | * @tag: Resulting tag of the failed command | |
1375 | * @tf: Resulting taskfile registers of the failed command | |
1376 | * | |
1377 | * Read log page 10h to obtain NCQ error details and clear error | |
1378 | * condition. | |
1379 | * | |
1380 | * LOCKING: | |
1381 | * Kernel thread context (may sleep). | |
1382 | * | |
1383 | * RETURNS: | |
1384 | * 0 on success, -errno otherwise. | |
1385 | */ | |
1386 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1387 | int *tag, struct ata_taskfile *tf) | |
1388 | { | |
9af5c9c9 | 1389 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1390 | unsigned int err_mask; |
1391 | u8 csum; | |
1392 | int i; | |
1393 | ||
1394 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); | |
1395 | if (err_mask) | |
1396 | return -EIO; | |
1397 | ||
1398 | csum = 0; | |
1399 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1400 | csum += buf[i]; | |
1401 | if (csum) | |
1402 | ata_dev_printk(dev, KERN_WARNING, | |
1403 | "invalid checksum 0x%x on log page 10h\n", csum); | |
1404 | ||
1405 | if (buf[0] & 0x80) | |
1406 | return -ENOENT; | |
1407 | ||
1408 | *tag = buf[0] & 0x1f; | |
1409 | ||
1410 | tf->command = buf[2]; | |
1411 | tf->feature = buf[3]; | |
1412 | tf->lbal = buf[4]; | |
1413 | tf->lbam = buf[5]; | |
1414 | tf->lbah = buf[6]; | |
1415 | tf->device = buf[7]; | |
1416 | tf->hob_lbal = buf[8]; | |
1417 | tf->hob_lbam = buf[9]; | |
1418 | tf->hob_lbah = buf[10]; | |
1419 | tf->nsect = buf[12]; | |
1420 | tf->hob_nsect = buf[13]; | |
1421 | ||
1422 | return 0; | |
1423 | } | |
1424 | ||
11fc33da TH |
1425 | /** |
1426 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1427 | * @dev: target ATAPI device | |
1428 | * @r_sense_key: out parameter for sense_key | |
1429 | * | |
1430 | * Perform ATAPI TEST_UNIT_READY. | |
1431 | * | |
1432 | * LOCKING: | |
1433 | * EH context (may sleep). | |
1434 | * | |
1435 | * RETURNS: | |
1436 | * 0 on success, AC_ERR_* mask on failure. | |
1437 | */ | |
1438 | static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) | |
1439 | { | |
1440 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1441 | struct ata_taskfile tf; | |
1442 | unsigned int err_mask; | |
1443 | ||
1444 | ata_tf_init(dev, &tf); | |
1445 | ||
1446 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1447 | tf.command = ATA_CMD_PACKET; | |
1448 | tf.protocol = ATAPI_PROT_NODATA; | |
1449 | ||
1450 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1451 | if (err_mask == AC_ERR_DEV) | |
1452 | *r_sense_key = tf.feature >> 4; | |
1453 | return err_mask; | |
1454 | } | |
1455 | ||
022bdb07 TH |
1456 | /** |
1457 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1458 | * @dev: device to perform REQUEST_SENSE to | |
1459 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1460 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1461 | * |
1462 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1463 | * SENSE. This function is EH helper. | |
1464 | * | |
1465 | * LOCKING: | |
1466 | * Kernel thread context (may sleep). | |
1467 | * | |
1468 | * RETURNS: | |
1469 | * 0 on success, AC_ERR_* mask on failure | |
1470 | */ | |
3eabddb8 TH |
1471 | static unsigned int atapi_eh_request_sense(struct ata_device *dev, |
1472 | u8 *sense_buf, u8 dfl_sense_key) | |
022bdb07 | 1473 | { |
3eabddb8 TH |
1474 | u8 cdb[ATAPI_CDB_LEN] = |
1475 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1476 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1477 | struct ata_taskfile tf; |
022bdb07 TH |
1478 | |
1479 | DPRINTK("ATAPI request sense\n"); | |
1480 | ||
022bdb07 TH |
1481 | /* FIXME: is this needed? */ |
1482 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
1483 | ||
56287768 AL |
1484 | /* initialize sense_buf with the error register, |
1485 | * for the case where they are -not- overwritten | |
1486 | */ | |
022bdb07 | 1487 | sense_buf[0] = 0x70; |
3eabddb8 | 1488 | sense_buf[2] = dfl_sense_key; |
56287768 | 1489 | |
a617c09f | 1490 | /* some devices time out if garbage left in tf */ |
56287768 | 1491 | ata_tf_init(dev, &tf); |
022bdb07 | 1492 | |
022bdb07 TH |
1493 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1494 | tf.command = ATA_CMD_PACKET; | |
1495 | ||
1496 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1497 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1498 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1499 | tf.feature |= ATAPI_PKT_DMA; |
1500 | } else { | |
0dc36888 | 1501 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1502 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1503 | tf.lbah = 0; | |
022bdb07 TH |
1504 | } |
1505 | ||
1506 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1507 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1508 | } |
1509 | ||
1510 | /** | |
1511 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1512 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1513 | * |
1514 | * Analyze SError if available and further determine cause of | |
1515 | * failure. | |
1516 | * | |
1517 | * LOCKING: | |
1518 | * None. | |
1519 | */ | |
0260731f | 1520 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1521 | { |
0260731f | 1522 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1523 | u32 serror = ehc->i.serror; |
1524 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1525 | u32 hotplug_mask; |
022bdb07 | 1526 | |
e0614db2 | 1527 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1528 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1529 | action |= ATA_EH_RESET; |
022bdb07 TH |
1530 | } |
1531 | if (serror & SERR_PROTOCOL) { | |
1532 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1533 | action |= ATA_EH_RESET; |
022bdb07 TH |
1534 | } |
1535 | if (serror & SERR_INTERNAL) { | |
1536 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1537 | action |= ATA_EH_RESET; |
022bdb07 | 1538 | } |
f9df58cb TH |
1539 | |
1540 | /* Determine whether a hotplug event has occurred. Both | |
1541 | * SError.N/X are considered hotplug events for enabled or | |
1542 | * host links. For disabled PMP links, only N bit is | |
1543 | * considered as X bit is left at 1 for link plugging. | |
1544 | */ | |
1545 | hotplug_mask = 0; | |
1546 | ||
1547 | if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
1548 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; | |
1549 | else | |
1550 | hotplug_mask = SERR_PHYRDY_CHG; | |
1551 | ||
1552 | if (serror & hotplug_mask) | |
084fe639 | 1553 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1554 | |
1555 | ehc->i.err_mask |= err_mask; | |
1556 | ehc->i.action |= action; | |
1557 | } | |
1558 | ||
e8ee8451 TH |
1559 | /** |
1560 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1561 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1562 | * |
1563 | * Read log page 10h, determine the offending qc and acquire | |
1564 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1565 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1566 | * care of the rest. | |
1567 | * | |
1568 | * LOCKING: | |
1569 | * Kernel thread context (may sleep). | |
1570 | */ | |
10acf3b0 | 1571 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1572 | { |
0260731f TH |
1573 | struct ata_port *ap = link->ap; |
1574 | struct ata_eh_context *ehc = &link->eh_context; | |
1575 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1576 | struct ata_queued_cmd *qc; |
1577 | struct ata_taskfile tf; | |
1578 | int tag, rc; | |
1579 | ||
1580 | /* if frozen, we can't do much */ | |
b51e9e5d | 1581 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1582 | return; |
1583 | ||
1584 | /* is it NCQ device error? */ | |
0260731f | 1585 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1586 | return; |
1587 | ||
1588 | /* has LLDD analyzed already? */ | |
1589 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1590 | qc = __ata_qc_from_tag(ap, tag); | |
1591 | ||
1592 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1593 | continue; | |
1594 | ||
1595 | if (qc->err_mask) | |
1596 | return; | |
1597 | } | |
1598 | ||
1599 | /* okay, this error is ours */ | |
1600 | rc = ata_eh_read_log_10h(dev, &tag, &tf); | |
1601 | if (rc) { | |
0260731f | 1602 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
e8ee8451 TH |
1603 | "(errno=%d)\n", rc); |
1604 | return; | |
1605 | } | |
1606 | ||
0260731f TH |
1607 | if (!(link->sactive & (1 << tag))) { |
1608 | ata_link_printk(link, KERN_ERR, "log page 10h reported " | |
e8ee8451 TH |
1609 | "inactive tag %d\n", tag); |
1610 | return; | |
1611 | } | |
1612 | ||
1613 | /* we've got the perpetrator, condemn it */ | |
1614 | qc = __ata_qc_from_tag(ap, tag); | |
1615 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1616 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1617 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
e8ee8451 TH |
1618 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1619 | } | |
1620 | ||
022bdb07 TH |
1621 | /** |
1622 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1623 | * @qc: qc to analyze | |
1624 | * @tf: Taskfile registers to analyze | |
1625 | * | |
1626 | * Analyze taskfile of @qc and further determine cause of | |
1627 | * failure. This function also requests ATAPI sense data if | |
1628 | * avaliable. | |
1629 | * | |
1630 | * LOCKING: | |
1631 | * Kernel thread context (may sleep). | |
1632 | * | |
1633 | * RETURNS: | |
1634 | * Determined recovery action | |
1635 | */ | |
1636 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1637 | const struct ata_taskfile *tf) | |
1638 | { | |
1639 | unsigned int tmp, action = 0; | |
1640 | u8 stat = tf->command, err = tf->feature; | |
1641 | ||
1642 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1643 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1644 | return ATA_EH_RESET; |
022bdb07 TH |
1645 | } |
1646 | ||
a51d644a TH |
1647 | if (stat & (ATA_ERR | ATA_DF)) |
1648 | qc->err_mask |= AC_ERR_DEV; | |
1649 | else | |
022bdb07 TH |
1650 | return 0; |
1651 | ||
1652 | switch (qc->dev->class) { | |
1653 | case ATA_DEV_ATA: | |
1654 | if (err & ATA_ICRC) | |
1655 | qc->err_mask |= AC_ERR_ATA_BUS; | |
1656 | if (err & ATA_UNC) | |
1657 | qc->err_mask |= AC_ERR_MEDIA; | |
1658 | if (err & ATA_IDNF) | |
1659 | qc->err_mask |= AC_ERR_INVALID; | |
1660 | break; | |
1661 | ||
1662 | case ATA_DEV_ATAPI: | |
a569a30d | 1663 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1664 | tmp = atapi_eh_request_sense(qc->dev, |
1665 | qc->scsicmd->sense_buffer, | |
1666 | qc->result_tf.feature >> 4); | |
a569a30d TH |
1667 | if (!tmp) { |
1668 | /* ATA_QCFLAG_SENSE_VALID is used to | |
1669 | * tell atapi_qc_complete() that sense | |
1670 | * data is already valid. | |
1671 | * | |
1672 | * TODO: interpret sense data and set | |
1673 | * appropriate err_mask. | |
1674 | */ | |
1675 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
1676 | } else | |
1677 | qc->err_mask |= tmp; | |
1678 | } | |
022bdb07 TH |
1679 | } |
1680 | ||
1681 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) | |
cf480626 | 1682 | action |= ATA_EH_RESET; |
022bdb07 TH |
1683 | |
1684 | return action; | |
1685 | } | |
1686 | ||
76326ac1 TH |
1687 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1688 | int *xfer_ok) | |
022bdb07 | 1689 | { |
76326ac1 TH |
1690 | int base = 0; |
1691 | ||
1692 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1693 | *xfer_ok = 1; | |
1694 | ||
1695 | if (!*xfer_ok) | |
75f9cafc | 1696 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1697 | |
7d47e8d4 | 1698 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1699 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1700 | |
7d47e8d4 | 1701 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1702 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1703 | |
3884f7b0 | 1704 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1705 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1706 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1707 | if ((err_mask & |
1708 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1709 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1710 | } |
1711 | ||
1712 | return 0; | |
1713 | } | |
1714 | ||
7d47e8d4 | 1715 | struct speed_down_verdict_arg { |
022bdb07 | 1716 | u64 since; |
76326ac1 | 1717 | int xfer_ok; |
3884f7b0 | 1718 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1719 | }; |
1720 | ||
7d47e8d4 | 1721 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1722 | { |
7d47e8d4 | 1723 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1724 | int cat; |
022bdb07 TH |
1725 | |
1726 | if (ent->timestamp < arg->since) | |
1727 | return -1; | |
1728 | ||
76326ac1 TH |
1729 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1730 | &arg->xfer_ok); | |
7d47e8d4 | 1731 | arg->nr_errors[cat]++; |
76326ac1 | 1732 | |
022bdb07 TH |
1733 | return 0; |
1734 | } | |
1735 | ||
1736 | /** | |
7d47e8d4 | 1737 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1738 | * @dev: Device of interest |
1739 | * | |
1740 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1741 | * whether NCQ needs to be turned off, transfer speed should be |
1742 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1743 | * |
3884f7b0 TH |
1744 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1745 | * | |
1746 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1747 | * IO commands | |
1748 | * | |
1749 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1750 | * | |
76326ac1 TH |
1751 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1752 | * data transfer hasn't been verified. | |
1753 | * | |
3884f7b0 TH |
1754 | * Verdicts are |
1755 | * | |
1756 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1757 | * |
3884f7b0 TH |
1758 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1759 | * to PIO. | |
7d47e8d4 | 1760 | * |
3884f7b0 | 1761 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1762 | * |
3884f7b0 | 1763 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1764 | * taken per error. An action triggered by non-DUBIOUS errors |
1765 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1766 | * This is to expedite speed down decisions right after device is | |
1767 | * initially configured. | |
1768 | * | |
1769 | * The followings are speed down rules. #1 and #2 deal with | |
1770 | * DUBIOUS errors. | |
7d47e8d4 | 1771 | * |
76326ac1 TH |
1772 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1773 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1774 | * | |
1775 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1776 | * occurred during last 5 mins, NCQ_OFF. | |
1777 | * | |
1778 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
3884f7b0 | 1779 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1780 | * |
76326ac1 | 1781 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1782 | * during last 10 mins, NCQ_OFF. |
1783 | * | |
76326ac1 | 1784 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1785 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1786 | * |
022bdb07 TH |
1787 | * LOCKING: |
1788 | * Inherited from caller. | |
1789 | * | |
1790 | * RETURNS: | |
7d47e8d4 | 1791 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1792 | */ |
7d47e8d4 | 1793 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1794 | { |
7d47e8d4 TH |
1795 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1796 | u64 j64 = get_jiffies_64(); | |
1797 | struct speed_down_verdict_arg arg; | |
1798 | unsigned int verdict = 0; | |
022bdb07 | 1799 | |
3884f7b0 | 1800 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1801 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1802 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1803 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1804 | |
76326ac1 TH |
1805 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1806 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1807 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1808 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1809 | ||
1810 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1811 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1812 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1813 | ||
3884f7b0 TH |
1814 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1815 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1816 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1817 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1818 | |
3884f7b0 | 1819 | /* scan past 10 mins of error history */ |
022bdb07 | 1820 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1821 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1822 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1823 | |
3884f7b0 TH |
1824 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1825 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1826 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1827 | ||
1828 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1829 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1830 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1831 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1832 | |
7d47e8d4 | 1833 | return verdict; |
022bdb07 TH |
1834 | } |
1835 | ||
1836 | /** | |
1837 | * ata_eh_speed_down - record error and speed down if necessary | |
1838 | * @dev: Failed device | |
3884f7b0 | 1839 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1840 | * @err_mask: err_mask of the error |
1841 | * | |
1842 | * Record error and examine error history to determine whether | |
1843 | * adjusting transmission speed is necessary. It also sets | |
1844 | * transmission limits appropriately if such adjustment is | |
1845 | * necessary. | |
1846 | * | |
1847 | * LOCKING: | |
1848 | * Kernel thread context (may sleep). | |
1849 | * | |
1850 | * RETURNS: | |
7d47e8d4 | 1851 | * Determined recovery action. |
022bdb07 | 1852 | */ |
3884f7b0 TH |
1853 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1854 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1855 | { |
b1c72916 | 1856 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 1857 | int xfer_ok = 0; |
7d47e8d4 TH |
1858 | unsigned int verdict; |
1859 | unsigned int action = 0; | |
1860 | ||
1861 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1862 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1863 | return 0; |
1864 | ||
1865 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1866 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1867 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1868 | |
7d47e8d4 TH |
1869 | /* turn off NCQ? */ |
1870 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1871 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1872 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1873 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
1874 | ata_dev_printk(dev, KERN_WARNING, | |
1875 | "NCQ disabled due to excessive errors\n"); | |
1876 | goto done; | |
1877 | } | |
022bdb07 | 1878 | |
7d47e8d4 TH |
1879 | /* speed down? */ |
1880 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1881 | /* speed down SATA link speed if possible */ | |
a07d499b | 1882 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 1883 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1884 | goto done; |
1885 | } | |
022bdb07 | 1886 | |
7d47e8d4 TH |
1887 | /* lower transfer mode */ |
1888 | if (dev->spdn_cnt < 2) { | |
1889 | static const int dma_dnxfer_sel[] = | |
1890 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1891 | static const int pio_dnxfer_sel[] = | |
1892 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1893 | int sel; | |
1894 | ||
1895 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1896 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1897 | else | |
1898 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1899 | ||
1900 | dev->spdn_cnt++; | |
1901 | ||
1902 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1903 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1904 | goto done; |
1905 | } | |
1906 | } | |
1907 | } | |
1908 | ||
1909 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1910 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1911 | */ |
1912 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1913 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1914 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1915 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1916 | dev->spdn_cnt = 0; | |
cf480626 | 1917 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1918 | goto done; |
1919 | } | |
1920 | } | |
022bdb07 | 1921 | |
022bdb07 | 1922 | return 0; |
7d47e8d4 TH |
1923 | done: |
1924 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1925 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1926 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1927 | return action; |
022bdb07 TH |
1928 | } |
1929 | ||
1930 | /** | |
9b1e2658 TH |
1931 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1932 | * @link: host link to perform autopsy on | |
022bdb07 | 1933 | * |
0260731f TH |
1934 | * Analyze why @link failed and determine which recovery actions |
1935 | * are needed. This function also sets more detailed AC_ERR_* | |
1936 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1937 | * |
1938 | * LOCKING: | |
1939 | * Kernel thread context (may sleep). | |
1940 | */ | |
9b1e2658 | 1941 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1942 | { |
0260731f | 1943 | struct ata_port *ap = link->ap; |
936fd732 | 1944 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 1945 | struct ata_device *dev; |
3884f7b0 TH |
1946 | unsigned int all_err_mask = 0, eflags = 0; |
1947 | int tag; | |
022bdb07 TH |
1948 | u32 serror; |
1949 | int rc; | |
1950 | ||
1951 | DPRINTK("ENTER\n"); | |
1952 | ||
1cdaf534 TH |
1953 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1954 | return; | |
1955 | ||
022bdb07 | 1956 | /* obtain and analyze SError */ |
936fd732 | 1957 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1958 | if (rc == 0) { |
1959 | ehc->i.serror |= serror; | |
0260731f | 1960 | ata_eh_analyze_serror(link); |
4e57c517 | 1961 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 1962 | /* SError read failed, force reset and probing */ |
b558eddd | 1963 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 1964 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
1965 | ehc->i.err_mask |= AC_ERR_OTHER; |
1966 | } | |
022bdb07 | 1967 | |
e8ee8451 | 1968 | /* analyze NCQ failure */ |
0260731f | 1969 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 1970 | |
022bdb07 TH |
1971 | /* any real error trumps AC_ERR_OTHER */ |
1972 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
1973 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
1974 | ||
1975 | all_err_mask |= ehc->i.err_mask; | |
1976 | ||
1977 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1978 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1979 | ||
b1c72916 TH |
1980 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
1981 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
1982 | continue; |
1983 | ||
1984 | /* inherit upper level err_mask */ | |
1985 | qc->err_mask |= ehc->i.err_mask; | |
1986 | ||
022bdb07 | 1987 | /* analyze TF */ |
4528e4da | 1988 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
1989 | |
1990 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
1991 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
1992 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
1993 | AC_ERR_INVALID); | |
1994 | ||
1995 | /* any real error trumps unknown error */ | |
1996 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1997 | qc->err_mask &= ~AC_ERR_OTHER; | |
1998 | ||
1999 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 2000 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 2001 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 | 2002 | |
03faab78 TH |
2003 | /* determine whether the command is worth retrying */ |
2004 | if (!(qc->err_mask & AC_ERR_INVALID) && | |
2005 | ((qc->flags & ATA_QCFLAG_IO) || qc->err_mask != AC_ERR_DEV)) | |
2006 | qc->flags |= ATA_QCFLAG_RETRY; | |
2007 | ||
022bdb07 | 2008 | /* accumulate error info */ |
4528e4da | 2009 | ehc->i.dev = qc->dev; |
022bdb07 TH |
2010 | all_err_mask |= qc->err_mask; |
2011 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 2012 | eflags |= ATA_EFLAG_IS_IO; |
022bdb07 TH |
2013 | } |
2014 | ||
a20f33ff | 2015 | /* enforce default EH actions */ |
b51e9e5d | 2016 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 2017 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2018 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2019 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2020 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2021 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2022 | |
dfcc173d TH |
2023 | /* If we have offending qcs and the associated failed device, |
2024 | * perform per-dev EH action only on the offending device. | |
2025 | */ | |
4528e4da | 2026 | if (ehc->i.dev) { |
4528e4da TH |
2027 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2028 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2029 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2030 | } |
2031 | ||
2695e366 TH |
2032 | /* propagate timeout to host link */ |
2033 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2034 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2035 | ||
2036 | /* record error and consider speeding down */ | |
dfcc173d | 2037 | dev = ehc->i.dev; |
2695e366 TH |
2038 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2039 | ata_dev_enabled(link->device)))) | |
2040 | dev = link->device; | |
dfcc173d | 2041 | |
76326ac1 TH |
2042 | if (dev) { |
2043 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2044 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2045 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 2046 | } |
dfcc173d | 2047 | |
022bdb07 TH |
2048 | DPRINTK("EXIT\n"); |
2049 | } | |
2050 | ||
2051 | /** | |
9b1e2658 TH |
2052 | * ata_eh_autopsy - analyze error and determine recovery action |
2053 | * @ap: host port to perform autopsy on | |
2054 | * | |
2055 | * Analyze all links of @ap and determine why they failed and | |
2056 | * which recovery actions are needed. | |
2057 | * | |
2058 | * LOCKING: | |
2059 | * Kernel thread context (may sleep). | |
2060 | */ | |
fb7fd614 | 2061 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2062 | { |
2063 | struct ata_link *link; | |
2064 | ||
1eca4365 | 2065 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2066 | ata_eh_link_autopsy(link); |
2695e366 | 2067 | |
b1c72916 TH |
2068 | /* Handle the frigging slave link. Autopsy is done similarly |
2069 | * but actions and flags are transferred over to the master | |
2070 | * link and handled from there. | |
2071 | */ | |
2072 | if (ap->slave_link) { | |
2073 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2074 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2075 | ||
848e4c68 TH |
2076 | /* transfer control flags from master to slave */ |
2077 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2078 | ||
2079 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2080 | ata_eh_link_autopsy(ap->slave_link); |
2081 | ||
848e4c68 | 2082 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2083 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2084 | mehc->i.action |= sehc->i.action; | |
2085 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2086 | mehc->i.flags |= sehc->i.flags; | |
2087 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2088 | } | |
2089 | ||
2695e366 TH |
2090 | /* Autopsy of fanout ports can affect host link autopsy. |
2091 | * Perform host link autopsy last. | |
2092 | */ | |
071f44b1 | 2093 | if (sata_pmp_attached(ap)) |
2695e366 | 2094 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2095 | } |
2096 | ||
2097 | /** | |
2098 | * ata_eh_link_report - report error handling to user | |
0260731f | 2099 | * @link: ATA link EH is going on |
022bdb07 TH |
2100 | * |
2101 | * Report EH to user. | |
2102 | * | |
2103 | * LOCKING: | |
2104 | * None. | |
2105 | */ | |
9b1e2658 | 2106 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2107 | { |
0260731f TH |
2108 | struct ata_port *ap = link->ap; |
2109 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2110 | const char *frozen, *desc; |
a1e10f7e | 2111 | char tries_buf[6]; |
022bdb07 TH |
2112 | int tag, nr_failed = 0; |
2113 | ||
94ff3d54 TH |
2114 | if (ehc->i.flags & ATA_EHI_QUIET) |
2115 | return; | |
2116 | ||
022bdb07 TH |
2117 | desc = NULL; |
2118 | if (ehc->i.desc[0] != '\0') | |
2119 | desc = ehc->i.desc; | |
2120 | ||
2121 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2122 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2123 | ||
b1c72916 TH |
2124 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2125 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2126 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2127 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2128 | continue; |
2129 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2130 | continue; | |
2131 | ||
2132 | nr_failed++; | |
2133 | } | |
2134 | ||
2135 | if (!nr_failed && !ehc->i.err_mask) | |
2136 | return; | |
2137 | ||
2138 | frozen = ""; | |
b51e9e5d | 2139 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2140 | frozen = " frozen"; |
2141 | ||
a1e10f7e TH |
2142 | memset(tries_buf, 0, sizeof(tries_buf)); |
2143 | if (ap->eh_tries < ATA_EH_MAX_TRIES) | |
2144 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", | |
2145 | ap->eh_tries); | |
2146 | ||
022bdb07 | 2147 | if (ehc->i.dev) { |
e8ee8451 | 2148 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2149 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2150 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2151 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2152 | if (desc) |
b64bbc39 | 2153 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
022bdb07 | 2154 | } else { |
0260731f | 2155 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2156 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2157 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2158 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2159 | if (desc) |
0260731f | 2160 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
022bdb07 TH |
2161 | } |
2162 | ||
1333e194 | 2163 | if (ehc->i.serror) |
da0e21d3 | 2164 | ata_link_printk(link, KERN_ERR, |
1333e194 RH |
2165 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2166 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2167 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2168 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2169 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2170 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2171 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2172 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2173 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2174 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2175 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2176 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2177 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2178 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2179 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2180 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2181 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2182 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
1333e194 | 2183 | |
022bdb07 TH |
2184 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
2185 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 2186 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2187 | const u8 *cdb = qc->cdb; |
2188 | char data_buf[20] = ""; | |
2189 | char cdb_buf[70] = ""; | |
022bdb07 | 2190 | |
0260731f | 2191 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2192 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2193 | continue; |
2194 | ||
abb6a889 TH |
2195 | if (qc->dma_dir != DMA_NONE) { |
2196 | static const char *dma_str[] = { | |
2197 | [DMA_BIDIRECTIONAL] = "bidi", | |
2198 | [DMA_TO_DEVICE] = "out", | |
2199 | [DMA_FROM_DEVICE] = "in", | |
2200 | }; | |
2201 | static const char *prot_str[] = { | |
2202 | [ATA_PROT_PIO] = "pio", | |
2203 | [ATA_PROT_DMA] = "dma", | |
2204 | [ATA_PROT_NCQ] = "ncq", | |
0dc36888 TH |
2205 | [ATAPI_PROT_PIO] = "pio", |
2206 | [ATAPI_PROT_DMA] = "dma", | |
abb6a889 TH |
2207 | }; |
2208 | ||
2209 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", | |
2210 | prot_str[qc->tf.protocol], qc->nbytes, | |
2211 | dma_str[qc->dma_dir]); | |
2212 | } | |
2213 | ||
e39eec13 | 2214 | if (ata_is_atapi(qc->tf.protocol)) |
abb6a889 TH |
2215 | snprintf(cdb_buf, sizeof(cdb_buf), |
2216 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " | |
2217 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", | |
2218 | cdb[0], cdb[1], cdb[2], cdb[3], | |
2219 | cdb[4], cdb[5], cdb[6], cdb[7], | |
2220 | cdb[8], cdb[9], cdb[10], cdb[11], | |
2221 | cdb[12], cdb[13], cdb[14], cdb[15]); | |
2222 | ||
8a937581 TH |
2223 | ata_dev_printk(qc->dev, KERN_ERR, |
2224 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " | |
abb6a889 | 2225 | "tag %d%s\n %s" |
8a937581 | 2226 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2227 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2228 | cmd->command, cmd->feature, cmd->nsect, |
2229 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2230 | cmd->hob_feature, cmd->hob_nsect, | |
2231 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2232 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2233 | res->command, res->feature, res->nsect, |
2234 | res->lbal, res->lbam, res->lbah, | |
2235 | res->hob_feature, res->hob_nsect, | |
2236 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2237 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2238 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 RH |
2239 | |
2240 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | | |
2dcb407e | 2241 | ATA_ERR)) { |
1333e194 RH |
2242 | if (res->command & ATA_BUSY) |
2243 | ata_dev_printk(qc->dev, KERN_ERR, | |
2dcb407e | 2244 | "status: { Busy }\n"); |
1333e194 RH |
2245 | else |
2246 | ata_dev_printk(qc->dev, KERN_ERR, | |
2247 | "status: { %s%s%s%s}\n", | |
2248 | res->command & ATA_DRDY ? "DRDY " : "", | |
2249 | res->command & ATA_DF ? "DF " : "", | |
2250 | res->command & ATA_DRQ ? "DRQ " : "", | |
2dcb407e | 2251 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2252 | } |
2253 | ||
2254 | if (cmd->command != ATA_CMD_PACKET && | |
2255 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | | |
2256 | ATA_ABORTED))) | |
2257 | ata_dev_printk(qc->dev, KERN_ERR, | |
2258 | "error: { %s%s%s%s}\n", | |
2259 | res->feature & ATA_ICRC ? "ICRC " : "", | |
2260 | res->feature & ATA_UNC ? "UNC " : "", | |
2261 | res->feature & ATA_IDNF ? "IDNF " : "", | |
2dcb407e | 2262 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
022bdb07 TH |
2263 | } |
2264 | } | |
2265 | ||
9b1e2658 TH |
2266 | /** |
2267 | * ata_eh_report - report error handling to user | |
2268 | * @ap: ATA port to report EH about | |
2269 | * | |
2270 | * Report EH to user. | |
2271 | * | |
2272 | * LOCKING: | |
2273 | * None. | |
2274 | */ | |
fb7fd614 | 2275 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2276 | { |
2277 | struct ata_link *link; | |
2278 | ||
1eca4365 | 2279 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2280 | ata_eh_link_report(link); |
2281 | } | |
2282 | ||
cc0680a5 | 2283 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2284 | unsigned int *classes, unsigned long deadline, |
2285 | bool clear_classes) | |
d87fa38e | 2286 | { |
f58229f8 | 2287 | struct ata_device *dev; |
d87fa38e | 2288 | |
b1c72916 | 2289 | if (clear_classes) |
1eca4365 | 2290 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2291 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2292 | |
f046519f | 2293 | return reset(link, classes, deadline); |
d87fa38e TH |
2294 | } |
2295 | ||
ae791c05 | 2296 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
5dbfc9cb | 2297 | int rc, const unsigned int *classes) |
664faf09 | 2298 | { |
45db2f6c | 2299 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2300 | return 0; |
5dbfc9cb TH |
2301 | if (rc == -EAGAIN) |
2302 | return 1; | |
071f44b1 | 2303 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2304 | return 1; |
664faf09 TH |
2305 | return 0; |
2306 | } | |
2307 | ||
fb7fd614 TH |
2308 | int ata_eh_reset(struct ata_link *link, int classify, |
2309 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2310 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2311 | { |
afaa5c37 | 2312 | struct ata_port *ap = link->ap; |
b1c72916 | 2313 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2314 | struct ata_eh_context *ehc = &link->eh_context; |
b1c72916 | 2315 | struct ata_eh_context *sehc = &slave->eh_context; |
664faf09 | 2316 | unsigned int *classes = ehc->classes; |
416dc9ed | 2317 | unsigned int lflags = link->flags; |
1cdaf534 | 2318 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2319 | int max_tries = 0, try = 0; |
b1c72916 | 2320 | struct ata_link *failed_link; |
f58229f8 | 2321 | struct ata_device *dev; |
416dc9ed | 2322 | unsigned long deadline, now; |
022bdb07 | 2323 | ata_reset_fn_t reset; |
afaa5c37 | 2324 | unsigned long flags; |
416dc9ed | 2325 | u32 sstatus; |
b1c72916 | 2326 | int nr_unknown, rc; |
022bdb07 | 2327 | |
932648b0 TH |
2328 | /* |
2329 | * Prepare to reset | |
2330 | */ | |
d8af0eb6 TH |
2331 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2332 | max_tries++; | |
05944bdf TH |
2333 | if (link->flags & ATA_LFLAG_NO_HRST) |
2334 | hardreset = NULL; | |
2335 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2336 | softreset = NULL; | |
d8af0eb6 | 2337 | |
19b72321 TH |
2338 | /* make sure each reset attemp is at least COOL_DOWN apart */ |
2339 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
2340 | now = jiffies; | |
2341 | WARN_ON(time_after(ehc->last_reset, now)); | |
2342 | deadline = ata_deadline(ehc->last_reset, | |
2343 | ATA_EH_RESET_COOL_DOWN); | |
2344 | if (time_before(now, deadline)) | |
2345 | schedule_timeout_uninterruptible(deadline - now); | |
2346 | } | |
0a2c0f56 | 2347 | |
afaa5c37 TH |
2348 | spin_lock_irqsave(ap->lock, flags); |
2349 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2350 | spin_unlock_irqrestore(ap->lock, flags); | |
2351 | ||
cf480626 | 2352 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2353 | |
1eca4365 | 2354 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2355 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2356 | * may change configuration and be in PIO0 timing. If | |
2357 | * we do a hard reset (or are coming from power on) | |
2358 | * this is true for ATA or ATAPI. Until we've set a | |
2359 | * suitable controller mode we should not touch the | |
2360 | * bus as we may be talking too fast. | |
2361 | */ | |
2362 | dev->pio_mode = XFER_PIO_0; | |
2363 | ||
2364 | /* If the controller has a pio mode setup function | |
2365 | * then use it to set the chipset to rights. Don't | |
2366 | * touch the DMA setup as that will be dealt with when | |
2367 | * configuring devices. | |
2368 | */ | |
2369 | if (ap->ops->set_piomode) | |
2370 | ap->ops->set_piomode(ap, dev); | |
2371 | } | |
2372 | ||
cf480626 | 2373 | /* prefer hardreset */ |
932648b0 | 2374 | reset = NULL; |
cf480626 TH |
2375 | ehc->i.action &= ~ATA_EH_RESET; |
2376 | if (hardreset) { | |
2377 | reset = hardreset; | |
a674050e | 2378 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2379 | } else if (softreset) { |
cf480626 | 2380 | reset = softreset; |
a674050e | 2381 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2382 | } |
f5914a46 TH |
2383 | |
2384 | if (prereset) { | |
b1c72916 TH |
2385 | unsigned long deadline = ata_deadline(jiffies, |
2386 | ATA_EH_PRERESET_TIMEOUT); | |
2387 | ||
2388 | if (slave) { | |
2389 | sehc->i.action &= ~ATA_EH_RESET; | |
2390 | sehc->i.action |= ehc->i.action; | |
2391 | } | |
2392 | ||
2393 | rc = prereset(link, deadline); | |
2394 | ||
2395 | /* If present, do prereset on slave link too. Reset | |
2396 | * is skipped iff both master and slave links report | |
2397 | * -ENOENT or clear ATA_EH_RESET. | |
2398 | */ | |
2399 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2400 | int tmp; | |
2401 | ||
2402 | tmp = prereset(slave, deadline); | |
2403 | if (tmp != -ENOENT) | |
2404 | rc = tmp; | |
2405 | ||
2406 | ehc->i.action |= sehc->i.action; | |
2407 | } | |
2408 | ||
f5914a46 | 2409 | if (rc) { |
c961922b | 2410 | if (rc == -ENOENT) { |
cc0680a5 | 2411 | ata_link_printk(link, KERN_DEBUG, |
4aa9ab67 | 2412 | "port disabled. ignoring.\n"); |
cf480626 | 2413 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2414 | |
1eca4365 | 2415 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2416 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2417 | |
2418 | rc = 0; | |
c961922b | 2419 | } else |
cc0680a5 | 2420 | ata_link_printk(link, KERN_ERR, |
f5914a46 | 2421 | "prereset failed (errno=%d)\n", rc); |
fccb6ea5 | 2422 | goto out; |
f5914a46 | 2423 | } |
f5914a46 | 2424 | |
932648b0 | 2425 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2426 | * bang classes, thaw and return. |
932648b0 TH |
2427 | */ |
2428 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2429 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2430 | classes[dev->devno] = ATA_DEV_NONE; |
d6515e6f TH |
2431 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
2432 | ata_is_host_link(link)) | |
2433 | ata_eh_thaw_port(ap); | |
932648b0 TH |
2434 | rc = 0; |
2435 | goto out; | |
2436 | } | |
f5914a46 TH |
2437 | } |
2438 | ||
022bdb07 | 2439 | retry: |
932648b0 TH |
2440 | /* |
2441 | * Perform reset | |
2442 | */ | |
dc98c32c TH |
2443 | if (ata_is_host_link(link)) |
2444 | ata_eh_freeze_port(ap); | |
2445 | ||
341c2c95 | 2446 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2447 | |
932648b0 TH |
2448 | if (reset) { |
2449 | if (verbose) | |
2450 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", | |
2451 | reset == softreset ? "soft" : "hard"); | |
2452 | ||
2453 | /* mark that this EH session started with reset */ | |
19b72321 | 2454 | ehc->last_reset = jiffies; |
932648b0 TH |
2455 | if (reset == hardreset) |
2456 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2457 | else | |
2458 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2459 | |
b1c72916 TH |
2460 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2461 | if (rc && rc != -EAGAIN) { | |
2462 | failed_link = link; | |
5dbfc9cb | 2463 | goto fail; |
b1c72916 TH |
2464 | } |
2465 | ||
2466 | /* hardreset slave link if existent */ | |
2467 | if (slave && reset == hardreset) { | |
2468 | int tmp; | |
2469 | ||
2470 | if (verbose) | |
2471 | ata_link_printk(slave, KERN_INFO, | |
2472 | "hard resetting link\n"); | |
2473 | ||
2474 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2475 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2476 | false); | |
2477 | switch (tmp) { | |
2478 | case -EAGAIN: | |
2479 | rc = -EAGAIN; | |
2480 | case 0: | |
2481 | break; | |
2482 | default: | |
2483 | failed_link = slave; | |
2484 | rc = tmp; | |
2485 | goto fail; | |
2486 | } | |
2487 | } | |
022bdb07 | 2488 | |
b1c72916 | 2489 | /* perform follow-up SRST if necessary */ |
932648b0 | 2490 | if (reset == hardreset && |
5dbfc9cb | 2491 | ata_eh_followup_srst_needed(link, rc, classes)) { |
932648b0 | 2492 | reset = softreset; |
022bdb07 | 2493 | |
932648b0 TH |
2494 | if (!reset) { |
2495 | ata_link_printk(link, KERN_ERR, | |
2496 | "follow-up softreset required " | |
2497 | "but no softreset avaliable\n"); | |
b1c72916 | 2498 | failed_link = link; |
932648b0 TH |
2499 | rc = -EINVAL; |
2500 | goto fail; | |
2501 | } | |
664faf09 | 2502 | |
932648b0 | 2503 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2504 | rc = ata_do_reset(link, reset, classes, deadline, true); |
664faf09 | 2505 | } |
932648b0 TH |
2506 | } else { |
2507 | if (verbose) | |
2508 | ata_link_printk(link, KERN_INFO, "no reset method " | |
2509 | "available, skipping reset\n"); | |
2510 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) | |
2511 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2512 | } |
2513 | ||
932648b0 TH |
2514 | /* |
2515 | * Post-reset processing | |
2516 | */ | |
1eca4365 | 2517 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2518 | /* After the reset, the device state is PIO 0 and the |
2519 | * controller state is undefined. Reset also wakes up | |
2520 | * drives from sleeping mode. | |
2521 | */ | |
2522 | dev->pio_mode = XFER_PIO_0; | |
2523 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2524 | |
816ab897 TH |
2525 | if (!ata_phys_link_offline(ata_dev_phys_link(dev))) { |
2526 | /* apply class override */ | |
2527 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2528 | classes[dev->devno] = ATA_DEV_ATA; | |
2529 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2530 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
2531 | } else | |
2532 | classes[dev->devno] = ATA_DEV_NONE; | |
022bdb07 TH |
2533 | } |
2534 | ||
416dc9ed TH |
2535 | /* record current link speed */ |
2536 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2537 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2538 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2539 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2540 | |
dc98c32c TH |
2541 | /* thaw the port */ |
2542 | if (ata_is_host_link(link)) | |
2543 | ata_eh_thaw_port(ap); | |
2544 | ||
f046519f TH |
2545 | /* postreset() should clear hardware SError. Although SError |
2546 | * is cleared during link resume, clearing SError here is | |
2547 | * necessary as some PHYs raise hotplug events after SRST. | |
2548 | * This introduces race condition where hotplug occurs between | |
2549 | * reset and here. This race is mediated by cross checking | |
2550 | * link onlineness and classification result later. | |
2551 | */ | |
b1c72916 | 2552 | if (postreset) { |
416dc9ed | 2553 | postreset(link, classes); |
b1c72916 TH |
2554 | if (slave) |
2555 | postreset(slave, classes); | |
2556 | } | |
20952b69 | 2557 | |
f046519f TH |
2558 | /* clear cached SError */ |
2559 | spin_lock_irqsave(link->ap->lock, flags); | |
2560 | link->eh_info.serror = 0; | |
b1c72916 TH |
2561 | if (slave) |
2562 | slave->eh_info.serror = 0; | |
f046519f TH |
2563 | spin_unlock_irqrestore(link->ap->lock, flags); |
2564 | ||
2565 | /* Make sure onlineness and classification result correspond. | |
2566 | * Hotplug could have happened during reset and some | |
2567 | * controllers fail to wait while a drive is spinning up after | |
2568 | * being hotplugged causing misdetection. By cross checking | |
2569 | * link onlineness and classification result, those conditions | |
2570 | * can be reliably detected and retried. | |
2571 | */ | |
b1c72916 | 2572 | nr_unknown = 0; |
1eca4365 | 2573 | ata_for_each_dev(dev, link, ALL) { |
f046519f | 2574 | /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */ |
b1c72916 | 2575 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { |
f046519f | 2576 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 TH |
2577 | if (ata_phys_link_online(ata_dev_phys_link(dev))) |
2578 | nr_unknown++; | |
2579 | } | |
f046519f TH |
2580 | } |
2581 | ||
b1c72916 | 2582 | if (classify && nr_unknown) { |
f046519f TH |
2583 | if (try < max_tries) { |
2584 | ata_link_printk(link, KERN_WARNING, "link online but " | |
2585 | "device misclassified, retrying\n"); | |
b1c72916 | 2586 | failed_link = link; |
f046519f TH |
2587 | rc = -EAGAIN; |
2588 | goto fail; | |
2589 | } | |
2590 | ata_link_printk(link, KERN_WARNING, | |
2591 | "link online but device misclassified, " | |
2592 | "device detection might fail\n"); | |
2593 | } | |
2594 | ||
416dc9ed | 2595 | /* reset successful, schedule revalidation */ |
cf480626 | 2596 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2597 | if (slave) |
2598 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
19b72321 | 2599 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2600 | ehc->i.action |= ATA_EH_REVALIDATE; |
ae791c05 | 2601 | |
416dc9ed | 2602 | rc = 0; |
fccb6ea5 TH |
2603 | out: |
2604 | /* clear hotplug flag */ | |
2605 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2606 | if (slave) |
2607 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2608 | |
2609 | spin_lock_irqsave(ap->lock, flags); | |
2610 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2611 | spin_unlock_irqrestore(ap->lock, flags); | |
2612 | ||
022bdb07 | 2613 | return rc; |
416dc9ed TH |
2614 | |
2615 | fail: | |
5958e302 TH |
2616 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2617 | if (!ata_is_host_link(link) && | |
2618 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2619 | rc = -ERESTART; | |
2620 | ||
416dc9ed TH |
2621 | if (rc == -ERESTART || try >= max_tries) |
2622 | goto out; | |
2623 | ||
2624 | now = jiffies; | |
2625 | if (time_before(now, deadline)) { | |
2626 | unsigned long delta = deadline - now; | |
2627 | ||
b1c72916 | 2628 | ata_link_printk(failed_link, KERN_WARNING, |
0a2c0f56 TH |
2629 | "reset failed (errno=%d), retrying in %u secs\n", |
2630 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed TH |
2631 | |
2632 | while (delta) | |
2633 | delta = schedule_timeout_uninterruptible(delta); | |
2634 | } | |
2635 | ||
b1c72916 | 2636 | if (try == max_tries - 1) { |
a07d499b | 2637 | sata_down_spd_limit(link, 0); |
b1c72916 | 2638 | if (slave) |
a07d499b | 2639 | sata_down_spd_limit(slave, 0); |
b1c72916 | 2640 | } else if (rc == -EPIPE) |
a07d499b | 2641 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 2642 | |
416dc9ed TH |
2643 | if (hardreset) |
2644 | reset = hardreset; | |
2645 | goto retry; | |
022bdb07 TH |
2646 | } |
2647 | ||
45fabbb7 EO |
2648 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
2649 | { | |
2650 | struct ata_link *link; | |
2651 | struct ata_device *dev; | |
2652 | unsigned long flags; | |
2653 | ||
2654 | /* | |
2655 | * This function can be thought of as an extended version of | |
2656 | * ata_eh_about_to_do() specially crafted to accommodate the | |
2657 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
2658 | * does not leave the do {} while () loop in ata_eh_recover as | |
2659 | * long as the timeout for a park request to *one* device on | |
2660 | * the port has not expired, and since we still want to pick | |
2661 | * up park requests to other devices on the same port or | |
2662 | * timeout updates for the same device, we have to pull | |
2663 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
2664 | * ourselves at the beginning of each pass over the loop. | |
2665 | * | |
2666 | * Additionally, all write accesses to &ap->park_req_pending | |
2667 | * through INIT_COMPLETION() (see below) or complete_all() | |
2668 | * (see ata_scsi_park_store()) are protected by the host lock. | |
2669 | * As a result we have that park_req_pending.done is zero on | |
2670 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
2671 | * *all* devices on port ap have been pulled into the | |
2672 | * respective eh_context structs. If, and only if, | |
2673 | * park_req_pending.done is non-zero by the time we reach | |
2674 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
2675 | * has been scheduled for at least one of the devices on port | |
2676 | * ap and we have to cycle over the do {} while () loop in | |
2677 | * ata_eh_recover() again. | |
2678 | */ | |
2679 | ||
2680 | spin_lock_irqsave(ap->lock, flags); | |
2681 | INIT_COMPLETION(ap->park_req_pending); | |
1eca4365 TH |
2682 | ata_for_each_link(link, ap, EDGE) { |
2683 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
2684 | struct ata_eh_info *ehi = &link->eh_info; |
2685 | ||
2686 | link->eh_context.i.dev_action[dev->devno] |= | |
2687 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
2688 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
2689 | } | |
2690 | } | |
2691 | spin_unlock_irqrestore(ap->lock, flags); | |
2692 | } | |
2693 | ||
2694 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
2695 | { | |
2696 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2697 | struct ata_taskfile tf; | |
2698 | unsigned int err_mask; | |
2699 | ||
2700 | ata_tf_init(dev, &tf); | |
2701 | if (park) { | |
2702 | ehc->unloaded_mask |= 1 << dev->devno; | |
2703 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
2704 | tf.feature = 0x44; | |
2705 | tf.lbal = 0x4c; | |
2706 | tf.lbam = 0x4e; | |
2707 | tf.lbah = 0x55; | |
2708 | } else { | |
2709 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2710 | tf.command = ATA_CMD_CHK_POWER; | |
2711 | } | |
2712 | ||
2713 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
2714 | tf.protocol |= ATA_PROT_NODATA; | |
2715 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
2716 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
2717 | ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); | |
2718 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2719 | } | |
2720 | } | |
2721 | ||
0260731f | 2722 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2723 | struct ata_device **r_failed_dev) |
022bdb07 | 2724 | { |
0260731f TH |
2725 | struct ata_port *ap = link->ap; |
2726 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2727 | struct ata_device *dev; |
8c3c52a8 | 2728 | unsigned int new_mask = 0; |
084fe639 | 2729 | unsigned long flags; |
f58229f8 | 2730 | int rc = 0; |
022bdb07 TH |
2731 | |
2732 | DPRINTK("ENTER\n"); | |
2733 | ||
8c3c52a8 TH |
2734 | /* For PATA drive side cable detection to work, IDENTIFY must |
2735 | * be done backwards such that PDIAG- is released by the slave | |
2736 | * device before the master device is identified. | |
2737 | */ | |
1eca4365 | 2738 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
2739 | unsigned int action = ata_eh_dev_action(dev); |
2740 | unsigned int readid_flags = 0; | |
022bdb07 | 2741 | |
bff04647 TH |
2742 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2743 | readid_flags |= ATA_READID_POSTRESET; | |
2744 | ||
9666f400 | 2745 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2746 | WARN_ON(dev->class == ATA_DEV_PMP); |
2747 | ||
b1c72916 | 2748 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 2749 | rc = -EIO; |
8c3c52a8 | 2750 | goto err; |
022bdb07 TH |
2751 | } |
2752 | ||
0260731f | 2753 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2754 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2755 | readid_flags); | |
022bdb07 | 2756 | if (rc) |
8c3c52a8 | 2757 | goto err; |
022bdb07 | 2758 | |
0260731f | 2759 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2760 | |
baa1e78a TH |
2761 | /* Configuration may have changed, reconfigure |
2762 | * transfer mode. | |
2763 | */ | |
2764 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2765 | ||
3057ac3c | 2766 | /* schedule the scsi_rescan_device() here */ |
2767 | queue_work(ata_aux_wq, &(ap->scsi_rescan_task)); | |
084fe639 TH |
2768 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2769 | ehc->tries[dev->devno] && | |
2770 | ata_class_enabled(ehc->classes[dev->devno])) { | |
2771 | dev->class = ehc->classes[dev->devno]; | |
2772 | ||
633273a3 TH |
2773 | if (dev->class == ATA_DEV_PMP) |
2774 | rc = sata_pmp_attach(dev); | |
2775 | else | |
2776 | rc = ata_dev_read_id(dev, &dev->class, | |
2777 | readid_flags, dev->id); | |
8c3c52a8 TH |
2778 | switch (rc) { |
2779 | case 0: | |
99cf610a TH |
2780 | /* clear error info accumulated during probe */ |
2781 | ata_ering_clear(&dev->ering); | |
f58229f8 | 2782 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2783 | break; |
2784 | case -ENOENT: | |
55a8e2c8 TH |
2785 | /* IDENTIFY was issued to non-existent |
2786 | * device. No need to reset. Just | |
2787 | * thaw and kill the device. | |
2788 | */ | |
2789 | ata_eh_thaw_port(ap); | |
084fe639 TH |
2790 | dev->class = ATA_DEV_UNKNOWN; |
2791 | break; | |
8c3c52a8 TH |
2792 | default: |
2793 | dev->class = ATA_DEV_UNKNOWN; | |
2794 | goto err; | |
084fe639 | 2795 | } |
8c3c52a8 TH |
2796 | } |
2797 | } | |
084fe639 | 2798 | |
c1c4e8d5 | 2799 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
2800 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
2801 | if (ap->ops->cable_detect) | |
2802 | ap->cbl = ap->ops->cable_detect(ap); | |
2803 | ata_force_cbl(ap); | |
2804 | } | |
c1c4e8d5 | 2805 | |
8c3c52a8 TH |
2806 | /* Configure new devices forward such that user doesn't see |
2807 | * device detection messages backwards. | |
2808 | */ | |
1eca4365 | 2809 | ata_for_each_dev(dev, link, ALL) { |
633273a3 TH |
2810 | if (!(new_mask & (1 << dev->devno)) || |
2811 | dev->class == ATA_DEV_PMP) | |
8c3c52a8 TH |
2812 | continue; |
2813 | ||
2814 | ehc->i.flags |= ATA_EHI_PRINTINFO; | |
2815 | rc = ata_dev_configure(dev); | |
2816 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
2817 | if (rc) | |
2818 | goto err; | |
2819 | ||
2820 | spin_lock_irqsave(ap->lock, flags); | |
2821 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
2822 | spin_unlock_irqrestore(ap->lock, flags); | |
2823 | ||
2824 | /* new device discovered, configure xfermode */ | |
2825 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
2826 | } |
2827 | ||
8c3c52a8 | 2828 | return 0; |
022bdb07 | 2829 | |
8c3c52a8 TH |
2830 | err: |
2831 | *r_failed_dev = dev; | |
2832 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
2833 | return rc; |
2834 | } | |
2835 | ||
6f1d1e3a TH |
2836 | /** |
2837 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2838 | * @link: link on which timings will be programmed | |
2839 | * @r_failed_dev: out paramter for failed device | |
2840 | * | |
2841 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2842 | * ata_set_mode() fails, pointer to the failing device is | |
2843 | * returned in @r_failed_dev. | |
2844 | * | |
2845 | * LOCKING: | |
2846 | * PCI/etc. bus probe sem. | |
2847 | * | |
2848 | * RETURNS: | |
2849 | * 0 on success, negative errno otherwise | |
2850 | */ | |
2851 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
2852 | { | |
2853 | struct ata_port *ap = link->ap; | |
00115e0f TH |
2854 | struct ata_device *dev; |
2855 | int rc; | |
6f1d1e3a | 2856 | |
76326ac1 | 2857 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 2858 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
2859 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
2860 | struct ata_ering_entry *ent; | |
2861 | ||
2862 | ent = ata_ering_top(&dev->ering); | |
2863 | if (ent) | |
2864 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
2865 | } | |
2866 | } | |
2867 | ||
6f1d1e3a TH |
2868 | /* has private set_mode? */ |
2869 | if (ap->ops->set_mode) | |
00115e0f TH |
2870 | rc = ap->ops->set_mode(link, r_failed_dev); |
2871 | else | |
2872 | rc = ata_do_set_mode(link, r_failed_dev); | |
2873 | ||
2874 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 2875 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
2876 | struct ata_eh_context *ehc = &link->eh_context; |
2877 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
2878 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
2879 | ||
2880 | if (dev->xfer_mode != saved_xfer_mode || | |
2881 | ata_ncq_enabled(dev) != saved_ncq) | |
2882 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
2883 | } | |
2884 | ||
2885 | return rc; | |
6f1d1e3a TH |
2886 | } |
2887 | ||
11fc33da TH |
2888 | /** |
2889 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
2890 | * @dev: ATAPI device to clear UA for | |
2891 | * | |
2892 | * Resets and other operations can make an ATAPI device raise | |
2893 | * UNIT ATTENTION which causes the next operation to fail. This | |
2894 | * function clears UA. | |
2895 | * | |
2896 | * LOCKING: | |
2897 | * EH context (may sleep). | |
2898 | * | |
2899 | * RETURNS: | |
2900 | * 0 on success, -errno on failure. | |
2901 | */ | |
2902 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
2903 | { | |
2904 | int i; | |
2905 | ||
2906 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 2907 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
2908 | u8 sense_key = 0; |
2909 | unsigned int err_mask; | |
2910 | ||
2911 | err_mask = atapi_eh_tur(dev, &sense_key); | |
2912 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
2913 | ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " | |
2914 | "failed (err_mask=0x%x)\n", err_mask); | |
2915 | return -EIO; | |
2916 | } | |
2917 | ||
2918 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
2919 | return 0; | |
2920 | ||
2921 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
2922 | if (err_mask) { | |
2923 | ata_dev_printk(dev, KERN_WARNING, "failed to clear " | |
2924 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); | |
2925 | return -EIO; | |
2926 | } | |
2927 | } | |
2928 | ||
2929 | ata_dev_printk(dev, KERN_WARNING, | |
2930 | "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); | |
2931 | ||
2932 | return 0; | |
2933 | } | |
2934 | ||
0260731f | 2935 | static int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 2936 | { |
f58229f8 TH |
2937 | struct ata_device *dev; |
2938 | int cnt = 0; | |
022bdb07 | 2939 | |
1eca4365 TH |
2940 | ata_for_each_dev(dev, link, ENABLED) |
2941 | cnt++; | |
022bdb07 TH |
2942 | return cnt; |
2943 | } | |
2944 | ||
0260731f | 2945 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 2946 | { |
f58229f8 TH |
2947 | struct ata_device *dev; |
2948 | int cnt = 0; | |
084fe639 | 2949 | |
1eca4365 | 2950 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2951 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
2952 | cnt++; |
2953 | return cnt; | |
2954 | } | |
2955 | ||
0260731f | 2956 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 2957 | { |
672b2d65 | 2958 | struct ata_port *ap = link->ap; |
0260731f | 2959 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 2960 | struct ata_device *dev; |
084fe639 | 2961 | |
f9df58cb TH |
2962 | /* skip disabled links */ |
2963 | if (link->flags & ATA_LFLAG_DISABLED) | |
2964 | return 1; | |
2965 | ||
672b2d65 TH |
2966 | /* thaw frozen port and recover failed devices */ |
2967 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
2968 | return 0; | |
2969 | ||
2970 | /* reset at least once if reset is requested */ | |
2971 | if ((ehc->i.action & ATA_EH_RESET) && | |
2972 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
2973 | return 0; |
2974 | ||
2975 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 2976 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
2977 | if (dev->class == ATA_DEV_UNKNOWN && |
2978 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
2979 | return 0; | |
2980 | } | |
2981 | ||
2982 | return 1; | |
2983 | } | |
2984 | ||
c2c7a89c TH |
2985 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
2986 | { | |
2987 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
2988 | u64 now = get_jiffies_64(); | |
2989 | int *trials = void_arg; | |
2990 | ||
2991 | if (ent->timestamp < now - min(now, interval)) | |
2992 | return -1; | |
2993 | ||
2994 | (*trials)++; | |
2995 | return 0; | |
2996 | } | |
2997 | ||
02c05a27 TH |
2998 | static int ata_eh_schedule_probe(struct ata_device *dev) |
2999 | { | |
3000 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3001 | struct ata_link *link = ata_dev_phys_link(dev); |
3002 | int trials = 0; | |
02c05a27 TH |
3003 | |
3004 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3005 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3006 | return 0; | |
3007 | ||
3008 | ata_eh_detach_dev(dev); | |
3009 | ata_dev_init(dev); | |
3010 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3011 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3012 | ehc->saved_xfer_mode[dev->devno] = 0; |
3013 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3014 | |
c2c7a89c TH |
3015 | /* Record and count probe trials on the ering. The specific |
3016 | * error mask used is irrelevant. Because a successful device | |
3017 | * detection clears the ering, this count accumulates only if | |
3018 | * there are consecutive failed probes. | |
3019 | * | |
3020 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3021 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3022 | * forced to 1.5Gbps. | |
3023 | * | |
3024 | * This is to work around cases where failed link speed | |
3025 | * negotiation results in device misdetection leading to | |
3026 | * infinite DEVXCHG or PHRDY CHG events. | |
3027 | */ | |
3028 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3029 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3030 | ||
3031 | if (trials > ATA_EH_PROBE_TRIALS) | |
3032 | sata_down_spd_limit(link, 1); | |
3033 | ||
02c05a27 TH |
3034 | return 1; |
3035 | } | |
3036 | ||
9b1e2658 | 3037 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3038 | { |
9af5c9c9 | 3039 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3040 | |
cf9a590a TH |
3041 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3042 | * The requester is responsible for ensuring forward progress. | |
3043 | */ | |
3044 | if (err != -EAGAIN) | |
3045 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3046 | |
3047 | switch (err) { | |
3048 | case -ENODEV: | |
3049 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3050 | ehc->i.probe_mask |= (1 << dev->devno); | |
3051 | case -EINVAL: | |
3052 | /* give it just one more chance */ | |
3053 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
3054 | case -EIO: | |
d89293ab | 3055 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3056 | /* This is the last chance, better to slow |
3057 | * down than lose it. | |
3058 | */ | |
a07d499b | 3059 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3060 | if (dev->pio_mode > XFER_PIO_0) |
3061 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3062 | } |
3063 | } | |
3064 | ||
3065 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3066 | /* disable device if it has used up all its chances */ | |
3067 | ata_dev_disable(dev); | |
3068 | ||
3069 | /* detach if offline */ | |
b1c72916 | 3070 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3071 | ata_eh_detach_dev(dev); |
3072 | ||
02c05a27 | 3073 | /* schedule probe if necessary */ |
87fbc5a0 | 3074 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3075 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3076 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3077 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3078 | } | |
9b1e2658 TH |
3079 | |
3080 | return 1; | |
fee7ca72 | 3081 | } else { |
cf480626 | 3082 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3083 | return 0; |
fee7ca72 TH |
3084 | } |
3085 | } | |
3086 | ||
022bdb07 TH |
3087 | /** |
3088 | * ata_eh_recover - recover host port after error | |
3089 | * @ap: host port to recover | |
f5914a46 | 3090 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3091 | * @softreset: softreset method (can be NULL) |
3092 | * @hardreset: hardreset method (can be NULL) | |
3093 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3094 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3095 | * |
3096 | * This is the alpha and omega, eum and yang, heart and soul of | |
3097 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3098 | * recover each link and hotplug requests are recorded in the |
3099 | * link's eh_context. This function executes all the operations | |
3100 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3101 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3102 | * |
3103 | * LOCKING: | |
3104 | * Kernel thread context (may sleep). | |
3105 | * | |
3106 | * RETURNS: | |
3107 | * 0 on success, -errno on failure. | |
3108 | */ | |
fb7fd614 TH |
3109 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3110 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3111 | ata_postreset_fn_t postreset, | |
3112 | struct ata_link **r_failed_link) | |
022bdb07 | 3113 | { |
9b1e2658 | 3114 | struct ata_link *link; |
022bdb07 | 3115 | struct ata_device *dev; |
0a2c0f56 | 3116 | int nr_failed_devs; |
dc98c32c | 3117 | int rc; |
45fabbb7 | 3118 | unsigned long flags, deadline; |
022bdb07 TH |
3119 | |
3120 | DPRINTK("ENTER\n"); | |
3121 | ||
3122 | /* prep for recovery */ | |
1eca4365 | 3123 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3124 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3125 | |
f9df58cb TH |
3126 | /* re-enable link? */ |
3127 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3128 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3129 | spin_lock_irqsave(ap->lock, flags); | |
3130 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3131 | spin_unlock_irqrestore(ap->lock, flags); | |
3132 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3133 | } | |
3134 | ||
1eca4365 | 3135 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3136 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3137 | ehc->tries[dev->devno] = 1; | |
3138 | else | |
3139 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3140 | |
9b1e2658 TH |
3141 | /* collect port action mask recorded in dev actions */ |
3142 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3143 | ~ATA_EH_PERDEV_MASK; | |
3144 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3145 | ||
3146 | /* process hotplug request */ | |
3147 | if (dev->flags & ATA_DFLAG_DETACH) | |
3148 | ata_eh_detach_dev(dev); | |
3149 | ||
02c05a27 TH |
3150 | /* schedule probe if necessary */ |
3151 | if (!ata_dev_enabled(dev)) | |
3152 | ata_eh_schedule_probe(dev); | |
084fe639 | 3153 | } |
022bdb07 TH |
3154 | } |
3155 | ||
3156 | retry: | |
022bdb07 | 3157 | rc = 0; |
9b1e2658 | 3158 | nr_failed_devs = 0; |
022bdb07 | 3159 | |
aeb2ecd6 | 3160 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3161 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3162 | goto out; |
3163 | ||
9b1e2658 | 3164 | /* prep for EH */ |
1eca4365 | 3165 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3166 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3167 | |
9b1e2658 TH |
3168 | /* skip EH if possible. */ |
3169 | if (ata_eh_skip_recovery(link)) | |
3170 | ehc->i.action = 0; | |
3171 | ||
1eca4365 | 3172 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3173 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3174 | } | |
084fe639 | 3175 | |
022bdb07 | 3176 | /* reset */ |
1eca4365 | 3177 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3178 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3179 | |
dc98c32c TH |
3180 | if (!(ehc->i.action & ATA_EH_RESET)) |
3181 | continue; | |
9b1e2658 | 3182 | |
dc98c32c TH |
3183 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3184 | prereset, softreset, hardreset, postreset); | |
3185 | if (rc) { | |
3186 | ata_link_printk(link, KERN_ERR, | |
3187 | "reset failed, giving up\n"); | |
3188 | goto out; | |
022bdb07 | 3189 | } |
022bdb07 TH |
3190 | } |
3191 | ||
45fabbb7 EO |
3192 | do { |
3193 | unsigned long now; | |
3194 | ||
3195 | /* | |
3196 | * clears ATA_EH_PARK in eh_info and resets | |
3197 | * ap->park_req_pending | |
3198 | */ | |
3199 | ata_eh_pull_park_action(ap); | |
3200 | ||
3201 | deadline = jiffies; | |
1eca4365 TH |
3202 | ata_for_each_link(link, ap, EDGE) { |
3203 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3204 | struct ata_eh_context *ehc = &link->eh_context; |
3205 | unsigned long tmp; | |
3206 | ||
3207 | if (dev->class != ATA_DEV_ATA) | |
3208 | continue; | |
3209 | if (!(ehc->i.dev_action[dev->devno] & | |
3210 | ATA_EH_PARK)) | |
3211 | continue; | |
3212 | tmp = dev->unpark_deadline; | |
3213 | if (time_before(deadline, tmp)) | |
3214 | deadline = tmp; | |
3215 | else if (time_before_eq(tmp, jiffies)) | |
3216 | continue; | |
3217 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3218 | continue; | |
3219 | ||
3220 | ata_eh_park_issue_cmd(dev, 1); | |
3221 | } | |
3222 | } | |
3223 | ||
3224 | now = jiffies; | |
3225 | if (time_before_eq(deadline, now)) | |
3226 | break; | |
3227 | ||
3228 | deadline = wait_for_completion_timeout(&ap->park_req_pending, | |
3229 | deadline - now); | |
3230 | } while (deadline); | |
1eca4365 TH |
3231 | ata_for_each_link(link, ap, EDGE) { |
3232 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3233 | if (!(link->eh_context.unloaded_mask & |
3234 | (1 << dev->devno))) | |
3235 | continue; | |
3236 | ||
3237 | ata_eh_park_issue_cmd(dev, 0); | |
3238 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3239 | } | |
3240 | } | |
3241 | ||
9b1e2658 | 3242 | /* the rest */ |
1eca4365 | 3243 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3244 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3245 | |
9b1e2658 TH |
3246 | /* revalidate existing devices and attach new ones */ |
3247 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3248 | if (rc) |
022bdb07 | 3249 | goto dev_fail; |
022bdb07 | 3250 | |
633273a3 TH |
3251 | /* if PMP got attached, return, pmp EH will take care of it */ |
3252 | if (link->device->class == ATA_DEV_PMP) { | |
3253 | ehc->i.action = 0; | |
3254 | return 0; | |
3255 | } | |
3256 | ||
9b1e2658 TH |
3257 | /* configure transfer mode if necessary */ |
3258 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3259 | rc = ata_set_mode(link, &dev); | |
3260 | if (rc) | |
3261 | goto dev_fail; | |
3262 | ehc->i.flags &= ~ATA_EHI_SETMODE; | |
3263 | } | |
3264 | ||
11fc33da TH |
3265 | /* If reset has been issued, clear UA to avoid |
3266 | * disrupting the current users of the device. | |
3267 | */ | |
3268 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3269 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3270 | if (dev->class != ATA_DEV_ATAPI) |
3271 | continue; | |
3272 | rc = atapi_eh_clear_ua(dev); | |
3273 | if (rc) | |
3274 | goto dev_fail; | |
3275 | } | |
3276 | } | |
3277 | ||
3278 | /* configure link power saving */ | |
3ec25ebd | 3279 | if (ehc->i.action & ATA_EH_LPM) |
1eca4365 | 3280 | ata_for_each_dev(dev, link, ALL) |
ca77329f KCA |
3281 | ata_dev_enable_pm(dev, ap->pm_policy); |
3282 | ||
9b1e2658 TH |
3283 | /* this link is okay now */ |
3284 | ehc->i.flags = 0; | |
3285 | continue; | |
022bdb07 | 3286 | |
2dcb407e | 3287 | dev_fail: |
9b1e2658 | 3288 | nr_failed_devs++; |
0a2c0f56 | 3289 | ata_eh_handle_dev_fail(dev, rc); |
022bdb07 | 3290 | |
b06ce3e5 TH |
3291 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3292 | /* PMP reset requires working host port. | |
3293 | * Can't retry if it's frozen. | |
3294 | */ | |
071f44b1 | 3295 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3296 | goto out; |
9b1e2658 | 3297 | break; |
b06ce3e5 | 3298 | } |
022bdb07 TH |
3299 | } |
3300 | ||
0a2c0f56 | 3301 | if (nr_failed_devs) |
9b1e2658 | 3302 | goto retry; |
022bdb07 | 3303 | |
9b1e2658 TH |
3304 | out: |
3305 | if (rc && r_failed_link) | |
3306 | *r_failed_link = link; | |
3307 | ||
022bdb07 TH |
3308 | DPRINTK("EXIT, rc=%d\n", rc); |
3309 | return rc; | |
3310 | } | |
3311 | ||
3312 | /** | |
3313 | * ata_eh_finish - finish up EH | |
3314 | * @ap: host port to finish EH for | |
3315 | * | |
3316 | * Recovery is complete. Clean up EH states and retry or finish | |
3317 | * failed qcs. | |
3318 | * | |
3319 | * LOCKING: | |
3320 | * None. | |
3321 | */ | |
fb7fd614 | 3322 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
3323 | { |
3324 | int tag; | |
3325 | ||
3326 | /* retry or finish qcs */ | |
3327 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
3328 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
3329 | ||
3330 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
3331 | continue; | |
3332 | ||
3333 | if (qc->err_mask) { | |
3334 | /* FIXME: Once EH migration is complete, | |
3335 | * generate sense data in this function, | |
3336 | * considering both err_mask and tf. | |
3337 | */ | |
03faab78 | 3338 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3339 | ata_eh_qc_retry(qc); |
03faab78 TH |
3340 | else |
3341 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3342 | } else { |
3343 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3344 | ata_eh_qc_complete(qc); | |
3345 | } else { | |
3346 | /* feed zero TF to sense generation */ | |
3347 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3348 | ata_eh_qc_retry(qc); | |
3349 | } | |
3350 | } | |
3351 | } | |
da917d69 TH |
3352 | |
3353 | /* make sure nr_active_links is zero after EH */ | |
3354 | WARN_ON(ap->nr_active_links); | |
3355 | ap->nr_active_links = 0; | |
022bdb07 TH |
3356 | } |
3357 | ||
3358 | /** | |
3359 | * ata_do_eh - do standard error handling | |
3360 | * @ap: host port to handle error for | |
a1efdaba | 3361 | * |
f5914a46 | 3362 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3363 | * @softreset: softreset method (can be NULL) |
3364 | * @hardreset: hardreset method (can be NULL) | |
3365 | * @postreset: postreset method (can be NULL) | |
3366 | * | |
3367 | * Perform standard error handling sequence. | |
3368 | * | |
3369 | * LOCKING: | |
3370 | * Kernel thread context (may sleep). | |
3371 | */ | |
f5914a46 TH |
3372 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3373 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3374 | ata_postreset_fn_t postreset) | |
022bdb07 | 3375 | { |
9b1e2658 TH |
3376 | struct ata_device *dev; |
3377 | int rc; | |
3378 | ||
3379 | ata_eh_autopsy(ap); | |
3380 | ata_eh_report(ap); | |
3381 | ||
3382 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3383 | NULL); | |
3384 | if (rc) { | |
1eca4365 | 3385 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
3386 | ata_dev_disable(dev); |
3387 | } | |
3388 | ||
022bdb07 TH |
3389 | ata_eh_finish(ap); |
3390 | } | |
500530f6 | 3391 | |
a1efdaba TH |
3392 | /** |
3393 | * ata_std_error_handler - standard error handler | |
3394 | * @ap: host port to handle error for | |
3395 | * | |
3396 | * Standard error handler | |
3397 | * | |
3398 | * LOCKING: | |
3399 | * Kernel thread context (may sleep). | |
3400 | */ | |
3401 | void ata_std_error_handler(struct ata_port *ap) | |
3402 | { | |
3403 | struct ata_port_operations *ops = ap->ops; | |
3404 | ata_reset_fn_t hardreset = ops->hardreset; | |
3405 | ||
57c9efdf TH |
3406 | /* ignore built-in hardreset if SCR access is not available */ |
3407 | if (ata_is_builtin_hardreset(hardreset) && !sata_scr_valid(&ap->link)) | |
a1efdaba TH |
3408 | hardreset = NULL; |
3409 | ||
3410 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
3411 | } | |
3412 | ||
6ffa01d8 | 3413 | #ifdef CONFIG_PM |
500530f6 TH |
3414 | /** |
3415 | * ata_eh_handle_port_suspend - perform port suspend operation | |
3416 | * @ap: port to suspend | |
3417 | * | |
3418 | * Suspend @ap. | |
3419 | * | |
3420 | * LOCKING: | |
3421 | * Kernel thread context (may sleep). | |
3422 | */ | |
3423 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
3424 | { | |
3425 | unsigned long flags; | |
3426 | int rc = 0; | |
3427 | ||
3428 | /* are we suspending? */ | |
3429 | spin_lock_irqsave(ap->lock, flags); | |
3430 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3431 | ap->pm_mesg.event == PM_EVENT_ON) { | |
3432 | spin_unlock_irqrestore(ap->lock, flags); | |
3433 | return; | |
3434 | } | |
3435 | spin_unlock_irqrestore(ap->lock, flags); | |
3436 | ||
3437 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
3438 | ||
64578a3d TH |
3439 | /* tell ACPI we're suspending */ |
3440 | rc = ata_acpi_on_suspend(ap); | |
3441 | if (rc) | |
3442 | goto out; | |
3443 | ||
500530f6 TH |
3444 | /* suspend */ |
3445 | ata_eh_freeze_port(ap); | |
3446 | ||
3447 | if (ap->ops->port_suspend) | |
3448 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
3449 | ||
bd3adca5 | 3450 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
64578a3d | 3451 | out: |
500530f6 TH |
3452 | /* report result */ |
3453 | spin_lock_irqsave(ap->lock, flags); | |
3454 | ||
3455 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
3456 | if (rc == 0) | |
3457 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 3458 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
3459 | ata_port_schedule_eh(ap); |
3460 | ||
3461 | if (ap->pm_result) { | |
3462 | *ap->pm_result = rc; | |
3463 | ap->pm_result = NULL; | |
3464 | } | |
3465 | ||
3466 | spin_unlock_irqrestore(ap->lock, flags); | |
3467 | ||
3468 | return; | |
3469 | } | |
3470 | ||
3471 | /** | |
3472 | * ata_eh_handle_port_resume - perform port resume operation | |
3473 | * @ap: port to resume | |
3474 | * | |
3475 | * Resume @ap. | |
3476 | * | |
500530f6 TH |
3477 | * LOCKING: |
3478 | * Kernel thread context (may sleep). | |
3479 | */ | |
3480 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
3481 | { | |
500530f6 | 3482 | unsigned long flags; |
9666f400 | 3483 | int rc = 0; |
500530f6 TH |
3484 | |
3485 | /* are we resuming? */ | |
3486 | spin_lock_irqsave(ap->lock, flags); | |
3487 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3488 | ap->pm_mesg.event != PM_EVENT_ON) { | |
3489 | spin_unlock_irqrestore(ap->lock, flags); | |
3490 | return; | |
3491 | } | |
3492 | spin_unlock_irqrestore(ap->lock, flags); | |
3493 | ||
9666f400 | 3494 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 3495 | |
bd3adca5 SL |
3496 | ata_acpi_set_state(ap, PMSG_ON); |
3497 | ||
500530f6 TH |
3498 | if (ap->ops->port_resume) |
3499 | rc = ap->ops->port_resume(ap); | |
3500 | ||
6746544c TH |
3501 | /* tell ACPI that we're resuming */ |
3502 | ata_acpi_on_resume(ap); | |
3503 | ||
9666f400 | 3504 | /* report result */ |
500530f6 TH |
3505 | spin_lock_irqsave(ap->lock, flags); |
3506 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
3507 | if (ap->pm_result) { | |
3508 | *ap->pm_result = rc; | |
3509 | ap->pm_result = NULL; | |
3510 | } | |
3511 | spin_unlock_irqrestore(ap->lock, flags); | |
3512 | } | |
6ffa01d8 | 3513 | #endif /* CONFIG_PM */ |