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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. | |
c96f1732 | 550 | * Both completions can race against SCSI timeout. When normal |
ad9e2762 TH |
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); |
c96f1732 AC |
565 | |
566 | /* This must occur under the ap->lock as we don't want | |
567 | a polled recovery to race the real interrupt handler | |
568 | ||
569 | The lost_interrupt handler checks for any completed but | |
570 | non-notified command and completes much like an IRQ handler. | |
571 | ||
572 | We then fall into the error recovery code which will treat | |
573 | this as if normal completion won the race */ | |
574 | ||
575 | if (ap->ops->lost_interrupt) | |
576 | ap->ops->lost_interrupt(ap); | |
577 | ||
ad9e2762 TH |
578 | list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { |
579 | struct ata_queued_cmd *qc; | |
580 | ||
581 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
582 | qc = __ata_qc_from_tag(ap, i); | |
583 | if (qc->flags & ATA_QCFLAG_ACTIVE && | |
584 | qc->scsicmd == scmd) | |
585 | break; | |
586 | } | |
587 | ||
588 | if (i < ATA_MAX_QUEUE) { | |
589 | /* the scmd has an associated qc */ | |
590 | if (!(qc->flags & ATA_QCFLAG_FAILED)) { | |
591 | /* which hasn't failed yet, timeout */ | |
592 | qc->err_mask |= AC_ERR_TIMEOUT; | |
593 | qc->flags |= ATA_QCFLAG_FAILED; | |
594 | nr_timedout++; | |
595 | } | |
596 | } else { | |
597 | /* Normal completion occurred after | |
598 | * SCSI timeout but before this point. | |
599 | * Successfully complete it. | |
600 | */ | |
601 | scmd->retries = scmd->allowed; | |
602 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
603 | } | |
604 | } | |
605 | ||
606 | /* If we have timed out qcs. They belong to EH from | |
607 | * this point but the state of the controller is | |
608 | * unknown. Freeze the port to make sure the IRQ | |
609 | * handler doesn't diddle with those qcs. This must | |
610 | * be done atomically w.r.t. setting QCFLAG_FAILED. | |
611 | */ | |
612 | if (nr_timedout) | |
613 | __ata_port_freeze(ap); | |
614 | ||
e30349d2 | 615 | spin_unlock_irqrestore(ap->lock, flags); |
a1e10f7e TH |
616 | |
617 | /* initialize eh_tries */ | |
618 | ap->eh_tries = ATA_EH_MAX_TRIES; | |
ad9e2762 | 619 | } else |
e30349d2 | 620 | spin_unlock_wait(ap->lock); |
c96f1732 AC |
621 | |
622 | /* If we timed raced normal completion and there is nothing to | |
623 | recover nr_timedout == 0 why exactly are we doing error recovery ? */ | |
ad9e2762 TH |
624 | |
625 | repeat: | |
626 | /* invoke error handler */ | |
627 | if (ap->ops->error_handler) { | |
cf1b86c8 TH |
628 | struct ata_link *link; |
629 | ||
5ddf24c5 TH |
630 | /* kill fast drain timer */ |
631 | del_timer_sync(&ap->fastdrain_timer); | |
632 | ||
500530f6 TH |
633 | /* process port resume request */ |
634 | ata_eh_handle_port_resume(ap); | |
635 | ||
f3e81b19 | 636 | /* fetch & clear EH info */ |
e30349d2 | 637 | spin_lock_irqsave(ap->lock, flags); |
f3e81b19 | 638 | |
1eca4365 | 639 | ata_for_each_link(link, ap, HOST_FIRST) { |
00115e0f TH |
640 | struct ata_eh_context *ehc = &link->eh_context; |
641 | struct ata_device *dev; | |
642 | ||
cf1b86c8 TH |
643 | memset(&link->eh_context, 0, sizeof(link->eh_context)); |
644 | link->eh_context.i = link->eh_info; | |
645 | memset(&link->eh_info, 0, sizeof(link->eh_info)); | |
00115e0f | 646 | |
1eca4365 | 647 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
648 | int devno = dev->devno; |
649 | ||
650 | ehc->saved_xfer_mode[devno] = dev->xfer_mode; | |
651 | if (ata_ncq_enabled(dev)) | |
652 | ehc->saved_ncq_enabled |= 1 << devno; | |
653 | } | |
cf1b86c8 | 654 | } |
f3e81b19 | 655 | |
b51e9e5d TH |
656 | ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS; |
657 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; | |
da917d69 | 658 | ap->excl_link = NULL; /* don't maintain exclusion over EH */ |
f3e81b19 | 659 | |
e30349d2 | 660 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 661 | |
500530f6 TH |
662 | /* invoke EH, skip if unloading or suspended */ |
663 | if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED))) | |
720ba126 | 664 | ap->ops->error_handler(ap); |
ece180d1 TH |
665 | else { |
666 | /* if unloading, commence suicide */ | |
667 | if ((ap->pflags & ATA_PFLAG_UNLOADING) && | |
668 | !(ap->pflags & ATA_PFLAG_UNLOADED)) | |
669 | ata_eh_unload(ap); | |
720ba126 | 670 | ata_eh_finish(ap); |
ece180d1 | 671 | } |
ad9e2762 | 672 | |
500530f6 TH |
673 | /* process port suspend request */ |
674 | ata_eh_handle_port_suspend(ap); | |
675 | ||
ad9e2762 TH |
676 | /* Exception might have happend after ->error_handler |
677 | * recovered the port but before this point. Repeat | |
678 | * EH in such case. | |
679 | */ | |
e30349d2 | 680 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 681 | |
b51e9e5d | 682 | if (ap->pflags & ATA_PFLAG_EH_PENDING) { |
a1e10f7e | 683 | if (--ap->eh_tries) { |
e30349d2 | 684 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 TH |
685 | goto repeat; |
686 | } | |
687 | ata_port_printk(ap, KERN_ERR, "EH pending after %d " | |
a1e10f7e | 688 | "tries, giving up\n", ATA_EH_MAX_TRIES); |
914616a3 | 689 | ap->pflags &= ~ATA_PFLAG_EH_PENDING; |
ad9e2762 TH |
690 | } |
691 | ||
f3e81b19 | 692 | /* this run is complete, make sure EH info is clear */ |
1eca4365 | 693 | ata_for_each_link(link, ap, HOST_FIRST) |
cf1b86c8 | 694 | memset(&link->eh_info, 0, sizeof(link->eh_info)); |
f3e81b19 | 695 | |
e30349d2 | 696 | /* Clear host_eh_scheduled while holding ap->lock such |
ad9e2762 TH |
697 | * that if exception occurs after this point but |
698 | * before EH completion, SCSI midlayer will | |
699 | * re-initiate EH. | |
700 | */ | |
701 | host->host_eh_scheduled = 0; | |
702 | ||
e30349d2 | 703 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 704 | } else { |
9af5c9c9 | 705 | WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL); |
ad9e2762 TH |
706 | ap->ops->eng_timeout(ap); |
707 | } | |
ece1d636 | 708 | |
ad9e2762 | 709 | /* finish or retry handled scmd's and clean up */ |
ece1d636 TH |
710 | WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); |
711 | ||
712 | scsi_eh_flush_done_q(&ap->eh_done_q); | |
713 | ||
ad9e2762 | 714 | /* clean up */ |
e30349d2 | 715 | spin_lock_irqsave(ap->lock, flags); |
ad9e2762 | 716 | |
1cdaf534 | 717 | if (ap->pflags & ATA_PFLAG_LOADING) |
b51e9e5d | 718 | ap->pflags &= ~ATA_PFLAG_LOADING; |
1cdaf534 | 719 | else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) |
52bad64d | 720 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, 0); |
1cdaf534 TH |
721 | |
722 | if (ap->pflags & ATA_PFLAG_RECOVERED) | |
723 | ata_port_printk(ap, KERN_INFO, "EH complete\n"); | |
580b2102 | 724 | |
b51e9e5d | 725 | ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED); |
ad9e2762 | 726 | |
c6cf9e99 | 727 | /* tell wait_eh that we're done */ |
b51e9e5d | 728 | ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS; |
c6cf9e99 TH |
729 | wake_up_all(&ap->eh_wait_q); |
730 | ||
e30349d2 | 731 | spin_unlock_irqrestore(ap->lock, flags); |
ad9e2762 | 732 | |
ece1d636 | 733 | DPRINTK("EXIT\n"); |
ece1d636 TH |
734 | } |
735 | ||
c6cf9e99 TH |
736 | /** |
737 | * ata_port_wait_eh - Wait for the currently pending EH to complete | |
738 | * @ap: Port to wait EH for | |
739 | * | |
740 | * Wait until the currently pending EH is complete. | |
741 | * | |
742 | * LOCKING: | |
743 | * Kernel thread context (may sleep). | |
744 | */ | |
745 | void ata_port_wait_eh(struct ata_port *ap) | |
746 | { | |
747 | unsigned long flags; | |
748 | DEFINE_WAIT(wait); | |
749 | ||
750 | retry: | |
ba6a1308 | 751 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 752 | |
b51e9e5d | 753 | while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) { |
c6cf9e99 | 754 | prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE); |
ba6a1308 | 755 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 | 756 | schedule(); |
ba6a1308 | 757 | spin_lock_irqsave(ap->lock, flags); |
c6cf9e99 | 758 | } |
0a1b622e | 759 | finish_wait(&ap->eh_wait_q, &wait); |
c6cf9e99 | 760 | |
ba6a1308 | 761 | spin_unlock_irqrestore(ap->lock, flags); |
c6cf9e99 TH |
762 | |
763 | /* make sure SCSI EH is complete */ | |
cca3974e | 764 | if (scsi_host_in_recovery(ap->scsi_host)) { |
c6cf9e99 TH |
765 | msleep(10); |
766 | goto retry; | |
767 | } | |
768 | } | |
769 | ||
5ddf24c5 TH |
770 | static int ata_eh_nr_in_flight(struct ata_port *ap) |
771 | { | |
772 | unsigned int tag; | |
773 | int nr = 0; | |
774 | ||
775 | /* count only non-internal commands */ | |
776 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) | |
777 | if (ata_qc_from_tag(ap, tag)) | |
778 | nr++; | |
779 | ||
780 | return nr; | |
781 | } | |
782 | ||
783 | void ata_eh_fastdrain_timerfn(unsigned long arg) | |
784 | { | |
785 | struct ata_port *ap = (void *)arg; | |
786 | unsigned long flags; | |
787 | int cnt; | |
788 | ||
789 | spin_lock_irqsave(ap->lock, flags); | |
790 | ||
791 | cnt = ata_eh_nr_in_flight(ap); | |
792 | ||
793 | /* are we done? */ | |
794 | if (!cnt) | |
795 | goto out_unlock; | |
796 | ||
797 | if (cnt == ap->fastdrain_cnt) { | |
798 | unsigned int tag; | |
799 | ||
800 | /* No progress during the last interval, tag all | |
801 | * in-flight qcs as timed out and freeze the port. | |
802 | */ | |
803 | for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) { | |
804 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
805 | if (qc) | |
806 | qc->err_mask |= AC_ERR_TIMEOUT; | |
807 | } | |
808 | ||
809 | ata_port_freeze(ap); | |
810 | } else { | |
811 | /* some qcs have finished, give it another chance */ | |
812 | ap->fastdrain_cnt = cnt; | |
813 | ap->fastdrain_timer.expires = | |
341c2c95 | 814 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); |
5ddf24c5 TH |
815 | add_timer(&ap->fastdrain_timer); |
816 | } | |
817 | ||
818 | out_unlock: | |
819 | spin_unlock_irqrestore(ap->lock, flags); | |
820 | } | |
821 | ||
822 | /** | |
823 | * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain | |
824 | * @ap: target ATA port | |
825 | * @fastdrain: activate fast drain | |
826 | * | |
827 | * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain | |
828 | * is non-zero and EH wasn't pending before. Fast drain ensures | |
829 | * that EH kicks in in timely manner. | |
830 | * | |
831 | * LOCKING: | |
832 | * spin_lock_irqsave(host lock) | |
833 | */ | |
834 | static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) | |
835 | { | |
836 | int cnt; | |
837 | ||
838 | /* already scheduled? */ | |
839 | if (ap->pflags & ATA_PFLAG_EH_PENDING) | |
840 | return; | |
841 | ||
842 | ap->pflags |= ATA_PFLAG_EH_PENDING; | |
843 | ||
844 | if (!fastdrain) | |
845 | return; | |
846 | ||
847 | /* do we have in-flight qcs? */ | |
848 | cnt = ata_eh_nr_in_flight(ap); | |
849 | if (!cnt) | |
850 | return; | |
851 | ||
852 | /* activate fast drain */ | |
853 | ap->fastdrain_cnt = cnt; | |
341c2c95 TH |
854 | ap->fastdrain_timer.expires = |
855 | ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL); | |
5ddf24c5 TH |
856 | add_timer(&ap->fastdrain_timer); |
857 | } | |
858 | ||
f686bcb8 TH |
859 | /** |
860 | * ata_qc_schedule_eh - schedule qc for error handling | |
861 | * @qc: command to schedule error handling for | |
862 | * | |
863 | * Schedule error handling for @qc. EH will kick in as soon as | |
864 | * other commands are drained. | |
865 | * | |
866 | * LOCKING: | |
cca3974e | 867 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
868 | */ |
869 | void ata_qc_schedule_eh(struct ata_queued_cmd *qc) | |
870 | { | |
871 | struct ata_port *ap = qc->ap; | |
872 | ||
873 | WARN_ON(!ap->ops->error_handler); | |
874 | ||
875 | qc->flags |= ATA_QCFLAG_FAILED; | |
5ddf24c5 | 876 | ata_eh_set_pending(ap, 1); |
f686bcb8 TH |
877 | |
878 | /* The following will fail if timeout has already expired. | |
879 | * ata_scsi_error() takes care of such scmds on EH entry. | |
880 | * Note that ATA_QCFLAG_FAILED is unconditionally set after | |
881 | * this function completes. | |
882 | */ | |
242f9dcb | 883 | blk_abort_request(qc->scsicmd->request); |
f686bcb8 TH |
884 | } |
885 | ||
7b70fc03 TH |
886 | /** |
887 | * ata_port_schedule_eh - schedule error handling without a qc | |
888 | * @ap: ATA port to schedule EH for | |
889 | * | |
890 | * Schedule error handling for @ap. EH will kick in as soon as | |
891 | * all commands are drained. | |
892 | * | |
893 | * LOCKING: | |
cca3974e | 894 | * spin_lock_irqsave(host lock) |
7b70fc03 TH |
895 | */ |
896 | void ata_port_schedule_eh(struct ata_port *ap) | |
897 | { | |
898 | WARN_ON(!ap->ops->error_handler); | |
899 | ||
f4d6d004 TH |
900 | if (ap->pflags & ATA_PFLAG_INITIALIZING) |
901 | return; | |
902 | ||
5ddf24c5 | 903 | ata_eh_set_pending(ap, 1); |
cca3974e | 904 | scsi_schedule_eh(ap->scsi_host); |
7b70fc03 TH |
905 | |
906 | DPRINTK("port EH scheduled\n"); | |
907 | } | |
908 | ||
dbd82616 | 909 | static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link) |
7b70fc03 TH |
910 | { |
911 | int tag, nr_aborted = 0; | |
912 | ||
913 | WARN_ON(!ap->ops->error_handler); | |
914 | ||
5ddf24c5 TH |
915 | /* we're gonna abort all commands, no need for fast drain */ |
916 | ata_eh_set_pending(ap, 0); | |
917 | ||
7b70fc03 TH |
918 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
919 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); | |
920 | ||
dbd82616 | 921 | if (qc && (!link || qc->dev->link == link)) { |
7b70fc03 TH |
922 | qc->flags |= ATA_QCFLAG_FAILED; |
923 | ata_qc_complete(qc); | |
924 | nr_aborted++; | |
925 | } | |
926 | } | |
927 | ||
928 | if (!nr_aborted) | |
929 | ata_port_schedule_eh(ap); | |
930 | ||
931 | return nr_aborted; | |
932 | } | |
933 | ||
dbd82616 TH |
934 | /** |
935 | * ata_link_abort - abort all qc's on the link | |
936 | * @link: ATA link to abort qc's for | |
937 | * | |
938 | * Abort all active qc's active on @link and schedule EH. | |
939 | * | |
940 | * LOCKING: | |
941 | * spin_lock_irqsave(host lock) | |
942 | * | |
943 | * RETURNS: | |
944 | * Number of aborted qc's. | |
945 | */ | |
946 | int ata_link_abort(struct ata_link *link) | |
947 | { | |
948 | return ata_do_link_abort(link->ap, link); | |
949 | } | |
950 | ||
951 | /** | |
952 | * ata_port_abort - abort all qc's on the port | |
953 | * @ap: ATA port to abort qc's for | |
954 | * | |
955 | * Abort all active qc's of @ap and schedule EH. | |
956 | * | |
957 | * LOCKING: | |
958 | * spin_lock_irqsave(host_set lock) | |
959 | * | |
960 | * RETURNS: | |
961 | * Number of aborted qc's. | |
962 | */ | |
963 | int ata_port_abort(struct ata_port *ap) | |
964 | { | |
965 | return ata_do_link_abort(ap, NULL); | |
966 | } | |
967 | ||
e3180499 TH |
968 | /** |
969 | * __ata_port_freeze - freeze port | |
970 | * @ap: ATA port to freeze | |
971 | * | |
972 | * This function is called when HSM violation or some other | |
973 | * condition disrupts normal operation of the port. Frozen port | |
974 | * is not allowed to perform any operation until the port is | |
975 | * thawed, which usually follows a successful reset. | |
976 | * | |
977 | * ap->ops->freeze() callback can be used for freezing the port | |
978 | * hardware-wise (e.g. mask interrupt and stop DMA engine). If a | |
979 | * port cannot be frozen hardware-wise, the interrupt handler | |
980 | * must ack and clear interrupts unconditionally while the port | |
981 | * is frozen. | |
982 | * | |
983 | * LOCKING: | |
cca3974e | 984 | * spin_lock_irqsave(host lock) |
e3180499 TH |
985 | */ |
986 | static void __ata_port_freeze(struct ata_port *ap) | |
987 | { | |
988 | WARN_ON(!ap->ops->error_handler); | |
989 | ||
990 | if (ap->ops->freeze) | |
991 | ap->ops->freeze(ap); | |
992 | ||
b51e9e5d | 993 | ap->pflags |= ATA_PFLAG_FROZEN; |
e3180499 | 994 | |
44877b4e | 995 | DPRINTK("ata%u port frozen\n", ap->print_id); |
e3180499 TH |
996 | } |
997 | ||
998 | /** | |
999 | * ata_port_freeze - abort & freeze port | |
1000 | * @ap: ATA port to freeze | |
1001 | * | |
1002 | * Abort and freeze @ap. | |
1003 | * | |
1004 | * LOCKING: | |
cca3974e | 1005 | * spin_lock_irqsave(host lock) |
e3180499 TH |
1006 | * |
1007 | * RETURNS: | |
1008 | * Number of aborted commands. | |
1009 | */ | |
1010 | int ata_port_freeze(struct ata_port *ap) | |
1011 | { | |
1012 | int nr_aborted; | |
1013 | ||
1014 | WARN_ON(!ap->ops->error_handler); | |
1015 | ||
1016 | nr_aborted = ata_port_abort(ap); | |
1017 | __ata_port_freeze(ap); | |
1018 | ||
1019 | return nr_aborted; | |
1020 | } | |
1021 | ||
7d77b247 TH |
1022 | /** |
1023 | * sata_async_notification - SATA async notification handler | |
1024 | * @ap: ATA port where async notification is received | |
1025 | * | |
1026 | * Handler to be called when async notification via SDB FIS is | |
1027 | * received. This function schedules EH if necessary. | |
1028 | * | |
1029 | * LOCKING: | |
1030 | * spin_lock_irqsave(host lock) | |
1031 | * | |
1032 | * RETURNS: | |
1033 | * 1 if EH is scheduled, 0 otherwise. | |
1034 | */ | |
1035 | int sata_async_notification(struct ata_port *ap) | |
1036 | { | |
1037 | u32 sntf; | |
1038 | int rc; | |
1039 | ||
1040 | if (!(ap->flags & ATA_FLAG_AN)) | |
1041 | return 0; | |
1042 | ||
1043 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
1044 | if (rc == 0) | |
1045 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
1046 | ||
071f44b1 | 1047 | if (!sata_pmp_attached(ap) || rc) { |
7d77b247 | 1048 | /* PMP is not attached or SNTF is not available */ |
071f44b1 | 1049 | if (!sata_pmp_attached(ap)) { |
7d77b247 TH |
1050 | /* PMP is not attached. Check whether ATAPI |
1051 | * AN is configured. If so, notify media | |
1052 | * change. | |
1053 | */ | |
1054 | struct ata_device *dev = ap->link.device; | |
1055 | ||
1056 | if ((dev->class == ATA_DEV_ATAPI) && | |
1057 | (dev->flags & ATA_DFLAG_AN)) | |
1058 | ata_scsi_media_change_notify(dev); | |
1059 | return 0; | |
1060 | } else { | |
1061 | /* PMP is attached but SNTF is not available. | |
1062 | * ATAPI async media change notification is | |
1063 | * not used. The PMP must be reporting PHY | |
1064 | * status change, schedule EH. | |
1065 | */ | |
1066 | ata_port_schedule_eh(ap); | |
1067 | return 1; | |
1068 | } | |
1069 | } else { | |
1070 | /* PMP is attached and SNTF is available */ | |
1071 | struct ata_link *link; | |
1072 | ||
1073 | /* check and notify ATAPI AN */ | |
1eca4365 | 1074 | ata_for_each_link(link, ap, EDGE) { |
7d77b247 TH |
1075 | if (!(sntf & (1 << link->pmp))) |
1076 | continue; | |
1077 | ||
1078 | if ((link->device->class == ATA_DEV_ATAPI) && | |
1079 | (link->device->flags & ATA_DFLAG_AN)) | |
1080 | ata_scsi_media_change_notify(link->device); | |
1081 | } | |
1082 | ||
1083 | /* If PMP is reporting that PHY status of some | |
1084 | * downstream ports has changed, schedule EH. | |
1085 | */ | |
1086 | if (sntf & (1 << SATA_PMP_CTRL_PORT)) { | |
1087 | ata_port_schedule_eh(ap); | |
1088 | return 1; | |
1089 | } | |
1090 | ||
1091 | return 0; | |
1092 | } | |
1093 | } | |
1094 | ||
e3180499 TH |
1095 | /** |
1096 | * ata_eh_freeze_port - EH helper to freeze port | |
1097 | * @ap: ATA port to freeze | |
1098 | * | |
1099 | * Freeze @ap. | |
1100 | * | |
1101 | * LOCKING: | |
1102 | * None. | |
1103 | */ | |
1104 | void ata_eh_freeze_port(struct ata_port *ap) | |
1105 | { | |
1106 | unsigned long flags; | |
1107 | ||
1108 | if (!ap->ops->error_handler) | |
1109 | return; | |
1110 | ||
ba6a1308 | 1111 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1112 | __ata_port_freeze(ap); |
ba6a1308 | 1113 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1114 | } |
1115 | ||
1116 | /** | |
1117 | * ata_port_thaw_port - EH helper to thaw port | |
1118 | * @ap: ATA port to thaw | |
1119 | * | |
1120 | * Thaw frozen port @ap. | |
1121 | * | |
1122 | * LOCKING: | |
1123 | * None. | |
1124 | */ | |
1125 | void ata_eh_thaw_port(struct ata_port *ap) | |
1126 | { | |
1127 | unsigned long flags; | |
1128 | ||
1129 | if (!ap->ops->error_handler) | |
1130 | return; | |
1131 | ||
ba6a1308 | 1132 | spin_lock_irqsave(ap->lock, flags); |
e3180499 | 1133 | |
b51e9e5d | 1134 | ap->pflags &= ~ATA_PFLAG_FROZEN; |
e3180499 TH |
1135 | |
1136 | if (ap->ops->thaw) | |
1137 | ap->ops->thaw(ap); | |
1138 | ||
ba6a1308 | 1139 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 | 1140 | |
44877b4e | 1141 | DPRINTK("ata%u port thawed\n", ap->print_id); |
e3180499 TH |
1142 | } |
1143 | ||
ece1d636 TH |
1144 | static void ata_eh_scsidone(struct scsi_cmnd *scmd) |
1145 | { | |
1146 | /* nada */ | |
1147 | } | |
1148 | ||
1149 | static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1150 | { | |
1151 | struct ata_port *ap = qc->ap; | |
1152 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1153 | unsigned long flags; | |
1154 | ||
ba6a1308 | 1155 | spin_lock_irqsave(ap->lock, flags); |
ece1d636 TH |
1156 | qc->scsidone = ata_eh_scsidone; |
1157 | __ata_qc_complete(qc); | |
1158 | WARN_ON(ata_tag_valid(qc->tag)); | |
ba6a1308 | 1159 | spin_unlock_irqrestore(ap->lock, flags); |
ece1d636 TH |
1160 | |
1161 | scsi_eh_finish_cmd(scmd, &ap->eh_done_q); | |
1162 | } | |
1163 | ||
1164 | /** | |
1165 | * ata_eh_qc_complete - Complete an active ATA command from EH | |
1166 | * @qc: Command to complete | |
1167 | * | |
1168 | * Indicate to the mid and upper layers that an ATA command has | |
1169 | * completed. To be used from EH. | |
1170 | */ | |
1171 | void ata_eh_qc_complete(struct ata_queued_cmd *qc) | |
1172 | { | |
1173 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1174 | scmd->retries = scmd->allowed; | |
1175 | __ata_eh_qc_complete(qc); | |
1176 | } | |
1177 | ||
1178 | /** | |
1179 | * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH | |
1180 | * @qc: Command to retry | |
1181 | * | |
1182 | * Indicate to the mid and upper layers that an ATA command | |
1183 | * should be retried. To be used from EH. | |
1184 | * | |
1185 | * SCSI midlayer limits the number of retries to scmd->allowed. | |
1186 | * scmd->retries is decremented for commands which get retried | |
1187 | * due to unrelated failures (qc->err_mask is zero). | |
1188 | */ | |
1189 | void ata_eh_qc_retry(struct ata_queued_cmd *qc) | |
1190 | { | |
1191 | struct scsi_cmnd *scmd = qc->scsicmd; | |
1192 | if (!qc->err_mask && scmd->retries) | |
1193 | scmd->retries--; | |
1194 | __ata_eh_qc_complete(qc); | |
1195 | } | |
022bdb07 | 1196 | |
678afac6 TH |
1197 | /** |
1198 | * ata_dev_disable - disable ATA device | |
1199 | * @dev: ATA device to disable | |
1200 | * | |
1201 | * Disable @dev. | |
1202 | * | |
1203 | * Locking: | |
1204 | * EH context. | |
1205 | */ | |
1206 | void ata_dev_disable(struct ata_device *dev) | |
1207 | { | |
1208 | if (!ata_dev_enabled(dev)) | |
1209 | return; | |
1210 | ||
1211 | if (ata_msg_drv(dev->link->ap)) | |
1212 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); | |
1213 | ata_acpi_on_disable(dev); | |
1214 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); | |
1215 | dev->class++; | |
99cf610a TH |
1216 | |
1217 | /* From now till the next successful probe, ering is used to | |
1218 | * track probe failures. Clear accumulated device error info. | |
1219 | */ | |
1220 | ata_ering_clear(&dev->ering); | |
678afac6 TH |
1221 | } |
1222 | ||
0ea035a3 TH |
1223 | /** |
1224 | * ata_eh_detach_dev - detach ATA device | |
1225 | * @dev: ATA device to detach | |
1226 | * | |
1227 | * Detach @dev. | |
1228 | * | |
1229 | * LOCKING: | |
1230 | * None. | |
1231 | */ | |
fb7fd614 | 1232 | void ata_eh_detach_dev(struct ata_device *dev) |
0ea035a3 | 1233 | { |
f58229f8 TH |
1234 | struct ata_link *link = dev->link; |
1235 | struct ata_port *ap = link->ap; | |
90484ebf | 1236 | struct ata_eh_context *ehc = &link->eh_context; |
0ea035a3 TH |
1237 | unsigned long flags; |
1238 | ||
1239 | ata_dev_disable(dev); | |
1240 | ||
ba6a1308 | 1241 | spin_lock_irqsave(ap->lock, flags); |
0ea035a3 TH |
1242 | |
1243 | dev->flags &= ~ATA_DFLAG_DETACH; | |
1244 | ||
1245 | if (ata_scsi_offline_dev(dev)) { | |
1246 | dev->flags |= ATA_DFLAG_DETACHED; | |
b51e9e5d | 1247 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; |
0ea035a3 TH |
1248 | } |
1249 | ||
90484ebf | 1250 | /* clear per-dev EH info */ |
f58229f8 TH |
1251 | ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK); |
1252 | ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK); | |
90484ebf TH |
1253 | ehc->saved_xfer_mode[dev->devno] = 0; |
1254 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
beb07c1a | 1255 | |
ba6a1308 | 1256 | spin_unlock_irqrestore(ap->lock, flags); |
0ea035a3 TH |
1257 | } |
1258 | ||
022bdb07 TH |
1259 | /** |
1260 | * ata_eh_about_to_do - about to perform eh_action | |
955e57df | 1261 | * @link: target ATA link |
47005f25 | 1262 | * @dev: target ATA dev for per-dev action (can be NULL) |
022bdb07 TH |
1263 | * @action: action about to be performed |
1264 | * | |
1265 | * Called just before performing EH actions to clear related bits | |
955e57df TH |
1266 | * in @link->eh_info such that eh actions are not unnecessarily |
1267 | * repeated. | |
022bdb07 TH |
1268 | * |
1269 | * LOCKING: | |
1270 | * None. | |
1271 | */ | |
fb7fd614 TH |
1272 | void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, |
1273 | unsigned int action) | |
022bdb07 | 1274 | { |
955e57df TH |
1275 | struct ata_port *ap = link->ap; |
1276 | struct ata_eh_info *ehi = &link->eh_info; | |
1277 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 TH |
1278 | unsigned long flags; |
1279 | ||
ba6a1308 | 1280 | spin_lock_irqsave(ap->lock, flags); |
1cdaf534 | 1281 | |
955e57df | 1282 | ata_eh_clear_action(link, dev, ehi, action); |
1cdaf534 | 1283 | |
a568d1d2 TH |
1284 | /* About to take EH action, set RECOVERED. Ignore actions on |
1285 | * slave links as master will do them again. | |
1286 | */ | |
1287 | if (!(ehc->i.flags & ATA_EHI_QUIET) && link != ap->slave_link) | |
1cdaf534 TH |
1288 | ap->pflags |= ATA_PFLAG_RECOVERED; |
1289 | ||
ba6a1308 | 1290 | spin_unlock_irqrestore(ap->lock, flags); |
022bdb07 TH |
1291 | } |
1292 | ||
47005f25 TH |
1293 | /** |
1294 | * ata_eh_done - EH action complete | |
955e57df | 1295 | * @ap: target ATA port |
47005f25 TH |
1296 | * @dev: target ATA dev for per-dev action (can be NULL) |
1297 | * @action: action just completed | |
1298 | * | |
1299 | * Called right after performing EH actions to clear related bits | |
955e57df | 1300 | * in @link->eh_context. |
47005f25 TH |
1301 | * |
1302 | * LOCKING: | |
1303 | * None. | |
1304 | */ | |
fb7fd614 TH |
1305 | void ata_eh_done(struct ata_link *link, struct ata_device *dev, |
1306 | unsigned int action) | |
47005f25 | 1307 | { |
955e57df | 1308 | struct ata_eh_context *ehc = &link->eh_context; |
9af5c9c9 | 1309 | |
955e57df | 1310 | ata_eh_clear_action(link, dev, &ehc->i, action); |
47005f25 TH |
1311 | } |
1312 | ||
022bdb07 TH |
1313 | /** |
1314 | * ata_err_string - convert err_mask to descriptive string | |
1315 | * @err_mask: error mask to convert to string | |
1316 | * | |
1317 | * Convert @err_mask to descriptive string. Errors are | |
1318 | * prioritized according to severity and only the most severe | |
1319 | * error is reported. | |
1320 | * | |
1321 | * LOCKING: | |
1322 | * None. | |
1323 | * | |
1324 | * RETURNS: | |
1325 | * Descriptive string for @err_mask | |
1326 | */ | |
2dcb407e | 1327 | static const char *ata_err_string(unsigned int err_mask) |
022bdb07 TH |
1328 | { |
1329 | if (err_mask & AC_ERR_HOST_BUS) | |
1330 | return "host bus error"; | |
1331 | if (err_mask & AC_ERR_ATA_BUS) | |
1332 | return "ATA bus error"; | |
1333 | if (err_mask & AC_ERR_TIMEOUT) | |
1334 | return "timeout"; | |
1335 | if (err_mask & AC_ERR_HSM) | |
1336 | return "HSM violation"; | |
1337 | if (err_mask & AC_ERR_SYSTEM) | |
1338 | return "internal error"; | |
1339 | if (err_mask & AC_ERR_MEDIA) | |
1340 | return "media error"; | |
1341 | if (err_mask & AC_ERR_INVALID) | |
1342 | return "invalid argument"; | |
1343 | if (err_mask & AC_ERR_DEV) | |
1344 | return "device error"; | |
1345 | return "unknown error"; | |
1346 | } | |
1347 | ||
e8ee8451 TH |
1348 | /** |
1349 | * ata_read_log_page - read a specific log page | |
1350 | * @dev: target device | |
1351 | * @page: page to read | |
1352 | * @buf: buffer to store read page | |
1353 | * @sectors: number of sectors to read | |
1354 | * | |
1355 | * Read log page using READ_LOG_EXT command. | |
1356 | * | |
1357 | * LOCKING: | |
1358 | * Kernel thread context (may sleep). | |
1359 | * | |
1360 | * RETURNS: | |
1361 | * 0 on success, AC_ERR_* mask otherwise. | |
1362 | */ | |
1363 | static unsigned int ata_read_log_page(struct ata_device *dev, | |
1364 | u8 page, void *buf, unsigned int sectors) | |
1365 | { | |
1366 | struct ata_taskfile tf; | |
1367 | unsigned int err_mask; | |
1368 | ||
1369 | DPRINTK("read log page - page %d\n", page); | |
1370 | ||
1371 | ata_tf_init(dev, &tf); | |
1372 | tf.command = ATA_CMD_READ_LOG_EXT; | |
1373 | tf.lbal = page; | |
1374 | tf.nsect = sectors; | |
1375 | tf.hob_nsect = sectors >> 8; | |
1376 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; | |
1377 | tf.protocol = ATA_PROT_PIO; | |
1378 | ||
1379 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
2b789108 | 1380 | buf, sectors * ATA_SECT_SIZE, 0); |
e8ee8451 TH |
1381 | |
1382 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
1383 | return err_mask; | |
1384 | } | |
1385 | ||
1386 | /** | |
1387 | * ata_eh_read_log_10h - Read log page 10h for NCQ error details | |
1388 | * @dev: Device to read log page 10h from | |
1389 | * @tag: Resulting tag of the failed command | |
1390 | * @tf: Resulting taskfile registers of the failed command | |
1391 | * | |
1392 | * Read log page 10h to obtain NCQ error details and clear error | |
1393 | * condition. | |
1394 | * | |
1395 | * LOCKING: | |
1396 | * Kernel thread context (may sleep). | |
1397 | * | |
1398 | * RETURNS: | |
1399 | * 0 on success, -errno otherwise. | |
1400 | */ | |
1401 | static int ata_eh_read_log_10h(struct ata_device *dev, | |
1402 | int *tag, struct ata_taskfile *tf) | |
1403 | { | |
9af5c9c9 | 1404 | u8 *buf = dev->link->ap->sector_buf; |
e8ee8451 TH |
1405 | unsigned int err_mask; |
1406 | u8 csum; | |
1407 | int i; | |
1408 | ||
1409 | err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); | |
1410 | if (err_mask) | |
1411 | return -EIO; | |
1412 | ||
1413 | csum = 0; | |
1414 | for (i = 0; i < ATA_SECT_SIZE; i++) | |
1415 | csum += buf[i]; | |
1416 | if (csum) | |
1417 | ata_dev_printk(dev, KERN_WARNING, | |
1418 | "invalid checksum 0x%x on log page 10h\n", csum); | |
1419 | ||
1420 | if (buf[0] & 0x80) | |
1421 | return -ENOENT; | |
1422 | ||
1423 | *tag = buf[0] & 0x1f; | |
1424 | ||
1425 | tf->command = buf[2]; | |
1426 | tf->feature = buf[3]; | |
1427 | tf->lbal = buf[4]; | |
1428 | tf->lbam = buf[5]; | |
1429 | tf->lbah = buf[6]; | |
1430 | tf->device = buf[7]; | |
1431 | tf->hob_lbal = buf[8]; | |
1432 | tf->hob_lbam = buf[9]; | |
1433 | tf->hob_lbah = buf[10]; | |
1434 | tf->nsect = buf[12]; | |
1435 | tf->hob_nsect = buf[13]; | |
1436 | ||
1437 | return 0; | |
1438 | } | |
1439 | ||
11fc33da TH |
1440 | /** |
1441 | * atapi_eh_tur - perform ATAPI TEST_UNIT_READY | |
1442 | * @dev: target ATAPI device | |
1443 | * @r_sense_key: out parameter for sense_key | |
1444 | * | |
1445 | * Perform ATAPI TEST_UNIT_READY. | |
1446 | * | |
1447 | * LOCKING: | |
1448 | * EH context (may sleep). | |
1449 | * | |
1450 | * RETURNS: | |
1451 | * 0 on success, AC_ERR_* mask on failure. | |
1452 | */ | |
1453 | static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key) | |
1454 | { | |
1455 | u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 }; | |
1456 | struct ata_taskfile tf; | |
1457 | unsigned int err_mask; | |
1458 | ||
1459 | ata_tf_init(dev, &tf); | |
1460 | ||
1461 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1462 | tf.command = ATA_CMD_PACKET; | |
1463 | tf.protocol = ATAPI_PROT_NODATA; | |
1464 | ||
1465 | err_mask = ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0); | |
1466 | if (err_mask == AC_ERR_DEV) | |
1467 | *r_sense_key = tf.feature >> 4; | |
1468 | return err_mask; | |
1469 | } | |
1470 | ||
022bdb07 TH |
1471 | /** |
1472 | * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE | |
1473 | * @dev: device to perform REQUEST_SENSE to | |
1474 | * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) | |
3eabddb8 | 1475 | * @dfl_sense_key: default sense key to use |
022bdb07 TH |
1476 | * |
1477 | * Perform ATAPI REQUEST_SENSE after the device reported CHECK | |
1478 | * SENSE. This function is EH helper. | |
1479 | * | |
1480 | * LOCKING: | |
1481 | * Kernel thread context (may sleep). | |
1482 | * | |
1483 | * RETURNS: | |
1484 | * 0 on success, AC_ERR_* mask on failure | |
1485 | */ | |
3eabddb8 TH |
1486 | static unsigned int atapi_eh_request_sense(struct ata_device *dev, |
1487 | u8 *sense_buf, u8 dfl_sense_key) | |
022bdb07 | 1488 | { |
3eabddb8 TH |
1489 | u8 cdb[ATAPI_CDB_LEN] = |
1490 | { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 }; | |
9af5c9c9 | 1491 | struct ata_port *ap = dev->link->ap; |
022bdb07 | 1492 | struct ata_taskfile tf; |
022bdb07 TH |
1493 | |
1494 | DPRINTK("ATAPI request sense\n"); | |
1495 | ||
022bdb07 TH |
1496 | /* FIXME: is this needed? */ |
1497 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
1498 | ||
56287768 AL |
1499 | /* initialize sense_buf with the error register, |
1500 | * for the case where they are -not- overwritten | |
1501 | */ | |
022bdb07 | 1502 | sense_buf[0] = 0x70; |
3eabddb8 | 1503 | sense_buf[2] = dfl_sense_key; |
56287768 | 1504 | |
a617c09f | 1505 | /* some devices time out if garbage left in tf */ |
56287768 | 1506 | ata_tf_init(dev, &tf); |
022bdb07 | 1507 | |
022bdb07 TH |
1508 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
1509 | tf.command = ATA_CMD_PACKET; | |
1510 | ||
1511 | /* is it pointless to prefer PIO for "safety reasons"? */ | |
1512 | if (ap->flags & ATA_FLAG_PIO_DMA) { | |
0dc36888 | 1513 | tf.protocol = ATAPI_PROT_DMA; |
022bdb07 TH |
1514 | tf.feature |= ATAPI_PKT_DMA; |
1515 | } else { | |
0dc36888 | 1516 | tf.protocol = ATAPI_PROT_PIO; |
f2dfc1a1 TH |
1517 | tf.lbam = SCSI_SENSE_BUFFERSIZE; |
1518 | tf.lbah = 0; | |
022bdb07 TH |
1519 | } |
1520 | ||
1521 | return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, | |
2b789108 | 1522 | sense_buf, SCSI_SENSE_BUFFERSIZE, 0); |
022bdb07 TH |
1523 | } |
1524 | ||
1525 | /** | |
1526 | * ata_eh_analyze_serror - analyze SError for a failed port | |
0260731f | 1527 | * @link: ATA link to analyze SError for |
022bdb07 TH |
1528 | * |
1529 | * Analyze SError if available and further determine cause of | |
1530 | * failure. | |
1531 | * | |
1532 | * LOCKING: | |
1533 | * None. | |
1534 | */ | |
0260731f | 1535 | static void ata_eh_analyze_serror(struct ata_link *link) |
022bdb07 | 1536 | { |
0260731f | 1537 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 TH |
1538 | u32 serror = ehc->i.serror; |
1539 | unsigned int err_mask = 0, action = 0; | |
f9df58cb | 1540 | u32 hotplug_mask; |
022bdb07 | 1541 | |
e0614db2 | 1542 | if (serror & (SERR_PERSISTENT | SERR_DATA)) { |
022bdb07 | 1543 | err_mask |= AC_ERR_ATA_BUS; |
cf480626 | 1544 | action |= ATA_EH_RESET; |
022bdb07 TH |
1545 | } |
1546 | if (serror & SERR_PROTOCOL) { | |
1547 | err_mask |= AC_ERR_HSM; | |
cf480626 | 1548 | action |= ATA_EH_RESET; |
022bdb07 TH |
1549 | } |
1550 | if (serror & SERR_INTERNAL) { | |
1551 | err_mask |= AC_ERR_SYSTEM; | |
cf480626 | 1552 | action |= ATA_EH_RESET; |
022bdb07 | 1553 | } |
f9df58cb TH |
1554 | |
1555 | /* Determine whether a hotplug event has occurred. Both | |
1556 | * SError.N/X are considered hotplug events for enabled or | |
1557 | * host links. For disabled PMP links, only N bit is | |
1558 | * considered as X bit is left at 1 for link plugging. | |
1559 | */ | |
1560 | hotplug_mask = 0; | |
1561 | ||
1562 | if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link)) | |
1563 | hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG; | |
1564 | else | |
1565 | hotplug_mask = SERR_PHYRDY_CHG; | |
1566 | ||
1567 | if (serror & hotplug_mask) | |
084fe639 | 1568 | ata_ehi_hotplugged(&ehc->i); |
022bdb07 TH |
1569 | |
1570 | ehc->i.err_mask |= err_mask; | |
1571 | ehc->i.action |= action; | |
1572 | } | |
1573 | ||
e8ee8451 TH |
1574 | /** |
1575 | * ata_eh_analyze_ncq_error - analyze NCQ error | |
0260731f | 1576 | * @link: ATA link to analyze NCQ error for |
e8ee8451 TH |
1577 | * |
1578 | * Read log page 10h, determine the offending qc and acquire | |
1579 | * error status TF. For NCQ device errors, all LLDDs have to do | |
1580 | * is setting AC_ERR_DEV in ehi->err_mask. This function takes | |
1581 | * care of the rest. | |
1582 | * | |
1583 | * LOCKING: | |
1584 | * Kernel thread context (may sleep). | |
1585 | */ | |
10acf3b0 | 1586 | void ata_eh_analyze_ncq_error(struct ata_link *link) |
e8ee8451 | 1587 | { |
0260731f TH |
1588 | struct ata_port *ap = link->ap; |
1589 | struct ata_eh_context *ehc = &link->eh_context; | |
1590 | struct ata_device *dev = link->device; | |
e8ee8451 TH |
1591 | struct ata_queued_cmd *qc; |
1592 | struct ata_taskfile tf; | |
1593 | int tag, rc; | |
1594 | ||
1595 | /* if frozen, we can't do much */ | |
b51e9e5d | 1596 | if (ap->pflags & ATA_PFLAG_FROZEN) |
e8ee8451 TH |
1597 | return; |
1598 | ||
1599 | /* is it NCQ device error? */ | |
0260731f | 1600 | if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) |
e8ee8451 TH |
1601 | return; |
1602 | ||
1603 | /* has LLDD analyzed already? */ | |
1604 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1605 | qc = __ata_qc_from_tag(ap, tag); | |
1606 | ||
1607 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
1608 | continue; | |
1609 | ||
1610 | if (qc->err_mask) | |
1611 | return; | |
1612 | } | |
1613 | ||
1614 | /* okay, this error is ours */ | |
1615 | rc = ata_eh_read_log_10h(dev, &tag, &tf); | |
1616 | if (rc) { | |
0260731f | 1617 | ata_link_printk(link, KERN_ERR, "failed to read log page 10h " |
e8ee8451 TH |
1618 | "(errno=%d)\n", rc); |
1619 | return; | |
1620 | } | |
1621 | ||
0260731f TH |
1622 | if (!(link->sactive & (1 << tag))) { |
1623 | ata_link_printk(link, KERN_ERR, "log page 10h reported " | |
e8ee8451 TH |
1624 | "inactive tag %d\n", tag); |
1625 | return; | |
1626 | } | |
1627 | ||
1628 | /* we've got the perpetrator, condemn it */ | |
1629 | qc = __ata_qc_from_tag(ap, tag); | |
1630 | memcpy(&qc->result_tf, &tf, sizeof(tf)); | |
a6116c9e | 1631 | qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
5335b729 | 1632 | qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ; |
e8ee8451 TH |
1633 | ehc->i.err_mask &= ~AC_ERR_DEV; |
1634 | } | |
1635 | ||
022bdb07 TH |
1636 | /** |
1637 | * ata_eh_analyze_tf - analyze taskfile of a failed qc | |
1638 | * @qc: qc to analyze | |
1639 | * @tf: Taskfile registers to analyze | |
1640 | * | |
1641 | * Analyze taskfile of @qc and further determine cause of | |
1642 | * failure. This function also requests ATAPI sense data if | |
1643 | * avaliable. | |
1644 | * | |
1645 | * LOCKING: | |
1646 | * Kernel thread context (may sleep). | |
1647 | * | |
1648 | * RETURNS: | |
1649 | * Determined recovery action | |
1650 | */ | |
1651 | static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, | |
1652 | const struct ata_taskfile *tf) | |
1653 | { | |
1654 | unsigned int tmp, action = 0; | |
1655 | u8 stat = tf->command, err = tf->feature; | |
1656 | ||
1657 | if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { | |
1658 | qc->err_mask |= AC_ERR_HSM; | |
cf480626 | 1659 | return ATA_EH_RESET; |
022bdb07 TH |
1660 | } |
1661 | ||
a51d644a TH |
1662 | if (stat & (ATA_ERR | ATA_DF)) |
1663 | qc->err_mask |= AC_ERR_DEV; | |
1664 | else | |
022bdb07 TH |
1665 | return 0; |
1666 | ||
1667 | switch (qc->dev->class) { | |
1668 | case ATA_DEV_ATA: | |
1669 | if (err & ATA_ICRC) | |
1670 | qc->err_mask |= AC_ERR_ATA_BUS; | |
1671 | if (err & ATA_UNC) | |
1672 | qc->err_mask |= AC_ERR_MEDIA; | |
1673 | if (err & ATA_IDNF) | |
1674 | qc->err_mask |= AC_ERR_INVALID; | |
1675 | break; | |
1676 | ||
1677 | case ATA_DEV_ATAPI: | |
a569a30d | 1678 | if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { |
3eabddb8 TH |
1679 | tmp = atapi_eh_request_sense(qc->dev, |
1680 | qc->scsicmd->sense_buffer, | |
1681 | qc->result_tf.feature >> 4); | |
a569a30d TH |
1682 | if (!tmp) { |
1683 | /* ATA_QCFLAG_SENSE_VALID is used to | |
1684 | * tell atapi_qc_complete() that sense | |
1685 | * data is already valid. | |
1686 | * | |
1687 | * TODO: interpret sense data and set | |
1688 | * appropriate err_mask. | |
1689 | */ | |
1690 | qc->flags |= ATA_QCFLAG_SENSE_VALID; | |
1691 | } else | |
1692 | qc->err_mask |= tmp; | |
1693 | } | |
022bdb07 TH |
1694 | } |
1695 | ||
1696 | if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) | |
cf480626 | 1697 | action |= ATA_EH_RESET; |
022bdb07 TH |
1698 | |
1699 | return action; | |
1700 | } | |
1701 | ||
76326ac1 TH |
1702 | static int ata_eh_categorize_error(unsigned int eflags, unsigned int err_mask, |
1703 | int *xfer_ok) | |
022bdb07 | 1704 | { |
76326ac1 TH |
1705 | int base = 0; |
1706 | ||
1707 | if (!(eflags & ATA_EFLAG_DUBIOUS_XFER)) | |
1708 | *xfer_ok = 1; | |
1709 | ||
1710 | if (!*xfer_ok) | |
75f9cafc | 1711 | base = ATA_ECAT_DUBIOUS_NONE; |
76326ac1 | 1712 | |
7d47e8d4 | 1713 | if (err_mask & AC_ERR_ATA_BUS) |
76326ac1 | 1714 | return base + ATA_ECAT_ATA_BUS; |
022bdb07 | 1715 | |
7d47e8d4 | 1716 | if (err_mask & AC_ERR_TIMEOUT) |
76326ac1 | 1717 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 | 1718 | |
3884f7b0 | 1719 | if (eflags & ATA_EFLAG_IS_IO) { |
7d47e8d4 | 1720 | if (err_mask & AC_ERR_HSM) |
76326ac1 | 1721 | return base + ATA_ECAT_TOUT_HSM; |
7d47e8d4 TH |
1722 | if ((err_mask & |
1723 | (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) | |
76326ac1 | 1724 | return base + ATA_ECAT_UNK_DEV; |
022bdb07 TH |
1725 | } |
1726 | ||
1727 | return 0; | |
1728 | } | |
1729 | ||
7d47e8d4 | 1730 | struct speed_down_verdict_arg { |
022bdb07 | 1731 | u64 since; |
76326ac1 | 1732 | int xfer_ok; |
3884f7b0 | 1733 | int nr_errors[ATA_ECAT_NR]; |
022bdb07 TH |
1734 | }; |
1735 | ||
7d47e8d4 | 1736 | static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) |
022bdb07 | 1737 | { |
7d47e8d4 | 1738 | struct speed_down_verdict_arg *arg = void_arg; |
76326ac1 | 1739 | int cat; |
022bdb07 TH |
1740 | |
1741 | if (ent->timestamp < arg->since) | |
1742 | return -1; | |
1743 | ||
76326ac1 TH |
1744 | cat = ata_eh_categorize_error(ent->eflags, ent->err_mask, |
1745 | &arg->xfer_ok); | |
7d47e8d4 | 1746 | arg->nr_errors[cat]++; |
76326ac1 | 1747 | |
022bdb07 TH |
1748 | return 0; |
1749 | } | |
1750 | ||
1751 | /** | |
7d47e8d4 | 1752 | * ata_eh_speed_down_verdict - Determine speed down verdict |
022bdb07 TH |
1753 | * @dev: Device of interest |
1754 | * | |
1755 | * This function examines error ring of @dev and determines | |
7d47e8d4 TH |
1756 | * whether NCQ needs to be turned off, transfer speed should be |
1757 | * stepped down, or falling back to PIO is necessary. | |
022bdb07 | 1758 | * |
3884f7b0 TH |
1759 | * ECAT_ATA_BUS : ATA_BUS error for any command |
1760 | * | |
1761 | * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for | |
1762 | * IO commands | |
1763 | * | |
1764 | * ECAT_UNK_DEV : Unknown DEV error for IO commands | |
1765 | * | |
76326ac1 TH |
1766 | * ECAT_DUBIOUS_* : Identical to above three but occurred while |
1767 | * data transfer hasn't been verified. | |
1768 | * | |
3884f7b0 TH |
1769 | * Verdicts are |
1770 | * | |
1771 | * NCQ_OFF : Turn off NCQ. | |
022bdb07 | 1772 | * |
3884f7b0 TH |
1773 | * SPEED_DOWN : Speed down transfer speed but don't fall back |
1774 | * to PIO. | |
7d47e8d4 | 1775 | * |
3884f7b0 | 1776 | * FALLBACK_TO_PIO : Fall back to PIO. |
022bdb07 | 1777 | * |
3884f7b0 | 1778 | * Even if multiple verdicts are returned, only one action is |
76326ac1 TH |
1779 | * taken per error. An action triggered by non-DUBIOUS errors |
1780 | * clears ering, while one triggered by DUBIOUS_* errors doesn't. | |
1781 | * This is to expedite speed down decisions right after device is | |
1782 | * initially configured. | |
1783 | * | |
1784 | * The followings are speed down rules. #1 and #2 deal with | |
1785 | * DUBIOUS errors. | |
7d47e8d4 | 1786 | * |
76326ac1 TH |
1787 | * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors |
1788 | * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO. | |
1789 | * | |
1790 | * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors | |
1791 | * occurred during last 5 mins, NCQ_OFF. | |
1792 | * | |
1793 | * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors | |
3884f7b0 | 1794 | * ocurred during last 5 mins, FALLBACK_TO_PIO |
7d47e8d4 | 1795 | * |
76326ac1 | 1796 | * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred |
3884f7b0 TH |
1797 | * during last 10 mins, NCQ_OFF. |
1798 | * | |
76326ac1 | 1799 | * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 |
3884f7b0 | 1800 | * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. |
7d47e8d4 | 1801 | * |
022bdb07 TH |
1802 | * LOCKING: |
1803 | * Inherited from caller. | |
1804 | * | |
1805 | * RETURNS: | |
7d47e8d4 | 1806 | * OR of ATA_EH_SPDN_* flags. |
022bdb07 | 1807 | */ |
7d47e8d4 | 1808 | static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) |
022bdb07 | 1809 | { |
7d47e8d4 TH |
1810 | const u64 j5mins = 5LLU * 60 * HZ, j10mins = 10LLU * 60 * HZ; |
1811 | u64 j64 = get_jiffies_64(); | |
1812 | struct speed_down_verdict_arg arg; | |
1813 | unsigned int verdict = 0; | |
022bdb07 | 1814 | |
3884f7b0 | 1815 | /* scan past 5 mins of error history */ |
7d47e8d4 | 1816 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1817 | arg.since = j64 - min(j64, j5mins); |
7d47e8d4 | 1818 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1819 | |
76326ac1 TH |
1820 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_ATA_BUS] + |
1821 | arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] > 1) | |
1822 | verdict |= ATA_EH_SPDN_SPEED_DOWN | | |
1823 | ATA_EH_SPDN_FALLBACK_TO_PIO | ATA_EH_SPDN_KEEP_ERRORS; | |
1824 | ||
1825 | if (arg.nr_errors[ATA_ECAT_DUBIOUS_TOUT_HSM] + | |
1826 | arg.nr_errors[ATA_ECAT_DUBIOUS_UNK_DEV] > 1) | |
1827 | verdict |= ATA_EH_SPDN_NCQ_OFF | ATA_EH_SPDN_KEEP_ERRORS; | |
1828 | ||
3884f7b0 TH |
1829 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + |
1830 | arg.nr_errors[ATA_ECAT_TOUT_HSM] + | |
663f99b8 | 1831 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1832 | verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; |
022bdb07 | 1833 | |
3884f7b0 | 1834 | /* scan past 10 mins of error history */ |
022bdb07 | 1835 | memset(&arg, 0, sizeof(arg)); |
3884f7b0 | 1836 | arg.since = j64 - min(j64, j10mins); |
7d47e8d4 | 1837 | ata_ering_map(&dev->ering, speed_down_verdict_cb, &arg); |
022bdb07 | 1838 | |
3884f7b0 TH |
1839 | if (arg.nr_errors[ATA_ECAT_TOUT_HSM] + |
1840 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 3) | |
1841 | verdict |= ATA_EH_SPDN_NCQ_OFF; | |
1842 | ||
1843 | if (arg.nr_errors[ATA_ECAT_ATA_BUS] + | |
1844 | arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || | |
663f99b8 | 1845 | arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) |
3884f7b0 | 1846 | verdict |= ATA_EH_SPDN_SPEED_DOWN; |
022bdb07 | 1847 | |
7d47e8d4 | 1848 | return verdict; |
022bdb07 TH |
1849 | } |
1850 | ||
1851 | /** | |
1852 | * ata_eh_speed_down - record error and speed down if necessary | |
1853 | * @dev: Failed device | |
3884f7b0 | 1854 | * @eflags: mask of ATA_EFLAG_* flags |
022bdb07 TH |
1855 | * @err_mask: err_mask of the error |
1856 | * | |
1857 | * Record error and examine error history to determine whether | |
1858 | * adjusting transmission speed is necessary. It also sets | |
1859 | * transmission limits appropriately if such adjustment is | |
1860 | * necessary. | |
1861 | * | |
1862 | * LOCKING: | |
1863 | * Kernel thread context (may sleep). | |
1864 | * | |
1865 | * RETURNS: | |
7d47e8d4 | 1866 | * Determined recovery action. |
022bdb07 | 1867 | */ |
3884f7b0 TH |
1868 | static unsigned int ata_eh_speed_down(struct ata_device *dev, |
1869 | unsigned int eflags, unsigned int err_mask) | |
022bdb07 | 1870 | { |
b1c72916 | 1871 | struct ata_link *link = ata_dev_phys_link(dev); |
76326ac1 | 1872 | int xfer_ok = 0; |
7d47e8d4 TH |
1873 | unsigned int verdict; |
1874 | unsigned int action = 0; | |
1875 | ||
1876 | /* don't bother if Cat-0 error */ | |
76326ac1 | 1877 | if (ata_eh_categorize_error(eflags, err_mask, &xfer_ok) == 0) |
022bdb07 TH |
1878 | return 0; |
1879 | ||
1880 | /* record error and determine whether speed down is necessary */ | |
3884f7b0 | 1881 | ata_ering_record(&dev->ering, eflags, err_mask); |
7d47e8d4 | 1882 | verdict = ata_eh_speed_down_verdict(dev); |
022bdb07 | 1883 | |
7d47e8d4 TH |
1884 | /* turn off NCQ? */ |
1885 | if ((verdict & ATA_EH_SPDN_NCQ_OFF) && | |
1886 | (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ | | |
1887 | ATA_DFLAG_NCQ_OFF)) == ATA_DFLAG_NCQ) { | |
1888 | dev->flags |= ATA_DFLAG_NCQ_OFF; | |
1889 | ata_dev_printk(dev, KERN_WARNING, | |
1890 | "NCQ disabled due to excessive errors\n"); | |
1891 | goto done; | |
1892 | } | |
022bdb07 | 1893 | |
7d47e8d4 TH |
1894 | /* speed down? */ |
1895 | if (verdict & ATA_EH_SPDN_SPEED_DOWN) { | |
1896 | /* speed down SATA link speed if possible */ | |
a07d499b | 1897 | if (sata_down_spd_limit(link, 0) == 0) { |
cf480626 | 1898 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1899 | goto done; |
1900 | } | |
022bdb07 | 1901 | |
7d47e8d4 TH |
1902 | /* lower transfer mode */ |
1903 | if (dev->spdn_cnt < 2) { | |
1904 | static const int dma_dnxfer_sel[] = | |
1905 | { ATA_DNXFER_DMA, ATA_DNXFER_40C }; | |
1906 | static const int pio_dnxfer_sel[] = | |
1907 | { ATA_DNXFER_PIO, ATA_DNXFER_FORCE_PIO0 }; | |
1908 | int sel; | |
1909 | ||
1910 | if (dev->xfer_shift != ATA_SHIFT_PIO) | |
1911 | sel = dma_dnxfer_sel[dev->spdn_cnt]; | |
1912 | else | |
1913 | sel = pio_dnxfer_sel[dev->spdn_cnt]; | |
1914 | ||
1915 | dev->spdn_cnt++; | |
1916 | ||
1917 | if (ata_down_xfermask_limit(dev, sel) == 0) { | |
cf480626 | 1918 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1919 | goto done; |
1920 | } | |
1921 | } | |
1922 | } | |
1923 | ||
1924 | /* Fall back to PIO? Slowing down to PIO is meaningless for | |
663f99b8 | 1925 | * SATA ATA devices. Consider it only for PATA and SATAPI. |
7d47e8d4 TH |
1926 | */ |
1927 | if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && | |
663f99b8 | 1928 | (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && |
7d47e8d4 TH |
1929 | (dev->xfer_shift != ATA_SHIFT_PIO)) { |
1930 | if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { | |
1931 | dev->spdn_cnt = 0; | |
cf480626 | 1932 | action |= ATA_EH_RESET; |
7d47e8d4 TH |
1933 | goto done; |
1934 | } | |
1935 | } | |
022bdb07 | 1936 | |
022bdb07 | 1937 | return 0; |
7d47e8d4 TH |
1938 | done: |
1939 | /* device has been slowed down, blow error history */ | |
76326ac1 TH |
1940 | if (!(verdict & ATA_EH_SPDN_KEEP_ERRORS)) |
1941 | ata_ering_clear(&dev->ering); | |
7d47e8d4 | 1942 | return action; |
022bdb07 TH |
1943 | } |
1944 | ||
1945 | /** | |
9b1e2658 TH |
1946 | * ata_eh_link_autopsy - analyze error and determine recovery action |
1947 | * @link: host link to perform autopsy on | |
022bdb07 | 1948 | * |
0260731f TH |
1949 | * Analyze why @link failed and determine which recovery actions |
1950 | * are needed. This function also sets more detailed AC_ERR_* | |
1951 | * values and fills sense data for ATAPI CHECK SENSE. | |
022bdb07 TH |
1952 | * |
1953 | * LOCKING: | |
1954 | * Kernel thread context (may sleep). | |
1955 | */ | |
9b1e2658 | 1956 | static void ata_eh_link_autopsy(struct ata_link *link) |
022bdb07 | 1957 | { |
0260731f | 1958 | struct ata_port *ap = link->ap; |
936fd732 | 1959 | struct ata_eh_context *ehc = &link->eh_context; |
dfcc173d | 1960 | struct ata_device *dev; |
3884f7b0 TH |
1961 | unsigned int all_err_mask = 0, eflags = 0; |
1962 | int tag; | |
022bdb07 TH |
1963 | u32 serror; |
1964 | int rc; | |
1965 | ||
1966 | DPRINTK("ENTER\n"); | |
1967 | ||
1cdaf534 TH |
1968 | if (ehc->i.flags & ATA_EHI_NO_AUTOPSY) |
1969 | return; | |
1970 | ||
022bdb07 | 1971 | /* obtain and analyze SError */ |
936fd732 | 1972 | rc = sata_scr_read(link, SCR_ERROR, &serror); |
022bdb07 TH |
1973 | if (rc == 0) { |
1974 | ehc->i.serror |= serror; | |
0260731f | 1975 | ata_eh_analyze_serror(link); |
4e57c517 | 1976 | } else if (rc != -EOPNOTSUPP) { |
cf480626 | 1977 | /* SError read failed, force reset and probing */ |
b558eddd | 1978 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 1979 | ehc->i.action |= ATA_EH_RESET; |
4e57c517 TH |
1980 | ehc->i.err_mask |= AC_ERR_OTHER; |
1981 | } | |
022bdb07 | 1982 | |
e8ee8451 | 1983 | /* analyze NCQ failure */ |
0260731f | 1984 | ata_eh_analyze_ncq_error(link); |
e8ee8451 | 1985 | |
022bdb07 TH |
1986 | /* any real error trumps AC_ERR_OTHER */ |
1987 | if (ehc->i.err_mask & ~AC_ERR_OTHER) | |
1988 | ehc->i.err_mask &= ~AC_ERR_OTHER; | |
1989 | ||
1990 | all_err_mask |= ehc->i.err_mask; | |
1991 | ||
1992 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
1993 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
1994 | ||
b1c72916 TH |
1995 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
1996 | ata_dev_phys_link(qc->dev) != link) | |
022bdb07 TH |
1997 | continue; |
1998 | ||
1999 | /* inherit upper level err_mask */ | |
2000 | qc->err_mask |= ehc->i.err_mask; | |
2001 | ||
022bdb07 | 2002 | /* analyze TF */ |
4528e4da | 2003 | ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf); |
022bdb07 TH |
2004 | |
2005 | /* DEV errors are probably spurious in case of ATA_BUS error */ | |
2006 | if (qc->err_mask & AC_ERR_ATA_BUS) | |
2007 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | | |
2008 | AC_ERR_INVALID); | |
2009 | ||
2010 | /* any real error trumps unknown error */ | |
2011 | if (qc->err_mask & ~AC_ERR_OTHER) | |
2012 | qc->err_mask &= ~AC_ERR_OTHER; | |
2013 | ||
2014 | /* SENSE_VALID trumps dev/unknown error and revalidation */ | |
f90f0828 | 2015 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) |
022bdb07 | 2016 | qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); |
022bdb07 | 2017 | |
03faab78 TH |
2018 | /* determine whether the command is worth retrying */ |
2019 | if (!(qc->err_mask & AC_ERR_INVALID) && | |
2020 | ((qc->flags & ATA_QCFLAG_IO) || qc->err_mask != AC_ERR_DEV)) | |
2021 | qc->flags |= ATA_QCFLAG_RETRY; | |
2022 | ||
022bdb07 | 2023 | /* accumulate error info */ |
4528e4da | 2024 | ehc->i.dev = qc->dev; |
022bdb07 TH |
2025 | all_err_mask |= qc->err_mask; |
2026 | if (qc->flags & ATA_QCFLAG_IO) | |
3884f7b0 | 2027 | eflags |= ATA_EFLAG_IS_IO; |
022bdb07 TH |
2028 | } |
2029 | ||
a20f33ff | 2030 | /* enforce default EH actions */ |
b51e9e5d | 2031 | if (ap->pflags & ATA_PFLAG_FROZEN || |
a20f33ff | 2032 | all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) |
cf480626 | 2033 | ehc->i.action |= ATA_EH_RESET; |
3884f7b0 TH |
2034 | else if (((eflags & ATA_EFLAG_IS_IO) && all_err_mask) || |
2035 | (!(eflags & ATA_EFLAG_IS_IO) && (all_err_mask & ~AC_ERR_DEV))) | |
4528e4da | 2036 | ehc->i.action |= ATA_EH_REVALIDATE; |
022bdb07 | 2037 | |
dfcc173d TH |
2038 | /* If we have offending qcs and the associated failed device, |
2039 | * perform per-dev EH action only on the offending device. | |
2040 | */ | |
4528e4da | 2041 | if (ehc->i.dev) { |
4528e4da TH |
2042 | ehc->i.dev_action[ehc->i.dev->devno] |= |
2043 | ehc->i.action & ATA_EH_PERDEV_MASK; | |
2044 | ehc->i.action &= ~ATA_EH_PERDEV_MASK; | |
47005f25 TH |
2045 | } |
2046 | ||
2695e366 TH |
2047 | /* propagate timeout to host link */ |
2048 | if ((all_err_mask & AC_ERR_TIMEOUT) && !ata_is_host_link(link)) | |
2049 | ap->link.eh_context.i.err_mask |= AC_ERR_TIMEOUT; | |
2050 | ||
2051 | /* record error and consider speeding down */ | |
dfcc173d | 2052 | dev = ehc->i.dev; |
2695e366 TH |
2053 | if (!dev && ((ata_link_max_devices(link) == 1 && |
2054 | ata_dev_enabled(link->device)))) | |
2055 | dev = link->device; | |
dfcc173d | 2056 | |
76326ac1 TH |
2057 | if (dev) { |
2058 | if (dev->flags & ATA_DFLAG_DUBIOUS_XFER) | |
2059 | eflags |= ATA_EFLAG_DUBIOUS_XFER; | |
3884f7b0 | 2060 | ehc->i.action |= ata_eh_speed_down(dev, eflags, all_err_mask); |
76326ac1 | 2061 | } |
dfcc173d | 2062 | |
022bdb07 TH |
2063 | DPRINTK("EXIT\n"); |
2064 | } | |
2065 | ||
2066 | /** | |
9b1e2658 TH |
2067 | * ata_eh_autopsy - analyze error and determine recovery action |
2068 | * @ap: host port to perform autopsy on | |
2069 | * | |
2070 | * Analyze all links of @ap and determine why they failed and | |
2071 | * which recovery actions are needed. | |
2072 | * | |
2073 | * LOCKING: | |
2074 | * Kernel thread context (may sleep). | |
2075 | */ | |
fb7fd614 | 2076 | void ata_eh_autopsy(struct ata_port *ap) |
9b1e2658 TH |
2077 | { |
2078 | struct ata_link *link; | |
2079 | ||
1eca4365 | 2080 | ata_for_each_link(link, ap, EDGE) |
9b1e2658 | 2081 | ata_eh_link_autopsy(link); |
2695e366 | 2082 | |
b1c72916 TH |
2083 | /* Handle the frigging slave link. Autopsy is done similarly |
2084 | * but actions and flags are transferred over to the master | |
2085 | * link and handled from there. | |
2086 | */ | |
2087 | if (ap->slave_link) { | |
2088 | struct ata_eh_context *mehc = &ap->link.eh_context; | |
2089 | struct ata_eh_context *sehc = &ap->slave_link->eh_context; | |
2090 | ||
848e4c68 TH |
2091 | /* transfer control flags from master to slave */ |
2092 | sehc->i.flags |= mehc->i.flags & ATA_EHI_TO_SLAVE_MASK; | |
2093 | ||
2094 | /* perform autopsy on the slave link */ | |
b1c72916 TH |
2095 | ata_eh_link_autopsy(ap->slave_link); |
2096 | ||
848e4c68 | 2097 | /* transfer actions from slave to master and clear slave */ |
b1c72916 TH |
2098 | ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); |
2099 | mehc->i.action |= sehc->i.action; | |
2100 | mehc->i.dev_action[1] |= sehc->i.dev_action[1]; | |
2101 | mehc->i.flags |= sehc->i.flags; | |
2102 | ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); | |
2103 | } | |
2104 | ||
2695e366 TH |
2105 | /* Autopsy of fanout ports can affect host link autopsy. |
2106 | * Perform host link autopsy last. | |
2107 | */ | |
071f44b1 | 2108 | if (sata_pmp_attached(ap)) |
2695e366 | 2109 | ata_eh_link_autopsy(&ap->link); |
9b1e2658 TH |
2110 | } |
2111 | ||
2112 | /** | |
2113 | * ata_eh_link_report - report error handling to user | |
0260731f | 2114 | * @link: ATA link EH is going on |
022bdb07 TH |
2115 | * |
2116 | * Report EH to user. | |
2117 | * | |
2118 | * LOCKING: | |
2119 | * None. | |
2120 | */ | |
9b1e2658 | 2121 | static void ata_eh_link_report(struct ata_link *link) |
022bdb07 | 2122 | { |
0260731f TH |
2123 | struct ata_port *ap = link->ap; |
2124 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2125 | const char *frozen, *desc; |
a1e10f7e | 2126 | char tries_buf[6]; |
022bdb07 TH |
2127 | int tag, nr_failed = 0; |
2128 | ||
94ff3d54 TH |
2129 | if (ehc->i.flags & ATA_EHI_QUIET) |
2130 | return; | |
2131 | ||
022bdb07 TH |
2132 | desc = NULL; |
2133 | if (ehc->i.desc[0] != '\0') | |
2134 | desc = ehc->i.desc; | |
2135 | ||
2136 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
2137 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
2138 | ||
b1c72916 TH |
2139 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
2140 | ata_dev_phys_link(qc->dev) != link || | |
e027bd36 TH |
2141 | ((qc->flags & ATA_QCFLAG_QUIET) && |
2142 | qc->err_mask == AC_ERR_DEV)) | |
022bdb07 TH |
2143 | continue; |
2144 | if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) | |
2145 | continue; | |
2146 | ||
2147 | nr_failed++; | |
2148 | } | |
2149 | ||
2150 | if (!nr_failed && !ehc->i.err_mask) | |
2151 | return; | |
2152 | ||
2153 | frozen = ""; | |
b51e9e5d | 2154 | if (ap->pflags & ATA_PFLAG_FROZEN) |
022bdb07 TH |
2155 | frozen = " frozen"; |
2156 | ||
a1e10f7e TH |
2157 | memset(tries_buf, 0, sizeof(tries_buf)); |
2158 | if (ap->eh_tries < ATA_EH_MAX_TRIES) | |
2159 | snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d", | |
2160 | ap->eh_tries); | |
2161 | ||
022bdb07 | 2162 | if (ehc->i.dev) { |
e8ee8451 | 2163 | ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2164 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2165 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2166 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2167 | if (desc) |
b64bbc39 | 2168 | ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc); |
022bdb07 | 2169 | } else { |
0260731f | 2170 | ata_link_printk(link, KERN_ERR, "exception Emask 0x%x " |
a1e10f7e TH |
2171 | "SAct 0x%x SErr 0x%x action 0x%x%s%s\n", |
2172 | ehc->i.err_mask, link->sactive, ehc->i.serror, | |
2173 | ehc->i.action, frozen, tries_buf); | |
022bdb07 | 2174 | if (desc) |
0260731f | 2175 | ata_link_printk(link, KERN_ERR, "%s\n", desc); |
022bdb07 TH |
2176 | } |
2177 | ||
1333e194 | 2178 | if (ehc->i.serror) |
da0e21d3 | 2179 | ata_link_printk(link, KERN_ERR, |
1333e194 RH |
2180 | "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n", |
2181 | ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "", | |
2182 | ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "", | |
2183 | ehc->i.serror & SERR_DATA ? "UnrecovData " : "", | |
2184 | ehc->i.serror & SERR_PERSISTENT ? "Persist " : "", | |
2185 | ehc->i.serror & SERR_PROTOCOL ? "Proto " : "", | |
2186 | ehc->i.serror & SERR_INTERNAL ? "HostInt " : "", | |
2187 | ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "", | |
2188 | ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "", | |
2189 | ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "", | |
2190 | ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "", | |
2191 | ehc->i.serror & SERR_DISPARITY ? "Dispar " : "", | |
2192 | ehc->i.serror & SERR_CRC ? "BadCRC " : "", | |
2193 | ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "", | |
2194 | ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "", | |
2195 | ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "", | |
2196 | ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "", | |
2dcb407e | 2197 | ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : ""); |
1333e194 | 2198 | |
022bdb07 TH |
2199 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { |
2200 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
8a937581 | 2201 | struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf; |
abb6a889 TH |
2202 | const u8 *cdb = qc->cdb; |
2203 | char data_buf[20] = ""; | |
2204 | char cdb_buf[70] = ""; | |
022bdb07 | 2205 | |
0260731f | 2206 | if (!(qc->flags & ATA_QCFLAG_FAILED) || |
b1c72916 | 2207 | ata_dev_phys_link(qc->dev) != link || !qc->err_mask) |
022bdb07 TH |
2208 | continue; |
2209 | ||
abb6a889 TH |
2210 | if (qc->dma_dir != DMA_NONE) { |
2211 | static const char *dma_str[] = { | |
2212 | [DMA_BIDIRECTIONAL] = "bidi", | |
2213 | [DMA_TO_DEVICE] = "out", | |
2214 | [DMA_FROM_DEVICE] = "in", | |
2215 | }; | |
2216 | static const char *prot_str[] = { | |
2217 | [ATA_PROT_PIO] = "pio", | |
2218 | [ATA_PROT_DMA] = "dma", | |
2219 | [ATA_PROT_NCQ] = "ncq", | |
0dc36888 TH |
2220 | [ATAPI_PROT_PIO] = "pio", |
2221 | [ATAPI_PROT_DMA] = "dma", | |
abb6a889 TH |
2222 | }; |
2223 | ||
2224 | snprintf(data_buf, sizeof(data_buf), " %s %u %s", | |
2225 | prot_str[qc->tf.protocol], qc->nbytes, | |
2226 | dma_str[qc->dma_dir]); | |
2227 | } | |
2228 | ||
e39eec13 | 2229 | if (ata_is_atapi(qc->tf.protocol)) |
abb6a889 TH |
2230 | snprintf(cdb_buf, sizeof(cdb_buf), |
2231 | "cdb %02x %02x %02x %02x %02x %02x %02x %02x " | |
2232 | "%02x %02x %02x %02x %02x %02x %02x %02x\n ", | |
2233 | cdb[0], cdb[1], cdb[2], cdb[3], | |
2234 | cdb[4], cdb[5], cdb[6], cdb[7], | |
2235 | cdb[8], cdb[9], cdb[10], cdb[11], | |
2236 | cdb[12], cdb[13], cdb[14], cdb[15]); | |
2237 | ||
8a937581 TH |
2238 | ata_dev_printk(qc->dev, KERN_ERR, |
2239 | "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " | |
abb6a889 | 2240 | "tag %d%s\n %s" |
8a937581 | 2241 | "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x " |
5335b729 | 2242 | "Emask 0x%x (%s)%s\n", |
8a937581 TH |
2243 | cmd->command, cmd->feature, cmd->nsect, |
2244 | cmd->lbal, cmd->lbam, cmd->lbah, | |
2245 | cmd->hob_feature, cmd->hob_nsect, | |
2246 | cmd->hob_lbal, cmd->hob_lbam, cmd->hob_lbah, | |
abb6a889 | 2247 | cmd->device, qc->tag, data_buf, cdb_buf, |
8a937581 TH |
2248 | res->command, res->feature, res->nsect, |
2249 | res->lbal, res->lbam, res->lbah, | |
2250 | res->hob_feature, res->hob_nsect, | |
2251 | res->hob_lbal, res->hob_lbam, res->hob_lbah, | |
5335b729 TH |
2252 | res->device, qc->err_mask, ata_err_string(qc->err_mask), |
2253 | qc->err_mask & AC_ERR_NCQ ? " <F>" : ""); | |
1333e194 RH |
2254 | |
2255 | if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | | |
2dcb407e | 2256 | ATA_ERR)) { |
1333e194 RH |
2257 | if (res->command & ATA_BUSY) |
2258 | ata_dev_printk(qc->dev, KERN_ERR, | |
2dcb407e | 2259 | "status: { Busy }\n"); |
1333e194 RH |
2260 | else |
2261 | ata_dev_printk(qc->dev, KERN_ERR, | |
2262 | "status: { %s%s%s%s}\n", | |
2263 | res->command & ATA_DRDY ? "DRDY " : "", | |
2264 | res->command & ATA_DF ? "DF " : "", | |
2265 | res->command & ATA_DRQ ? "DRQ " : "", | |
2dcb407e | 2266 | res->command & ATA_ERR ? "ERR " : ""); |
1333e194 RH |
2267 | } |
2268 | ||
2269 | if (cmd->command != ATA_CMD_PACKET && | |
2270 | (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF | | |
2271 | ATA_ABORTED))) | |
2272 | ata_dev_printk(qc->dev, KERN_ERR, | |
2273 | "error: { %s%s%s%s}\n", | |
2274 | res->feature & ATA_ICRC ? "ICRC " : "", | |
2275 | res->feature & ATA_UNC ? "UNC " : "", | |
2276 | res->feature & ATA_IDNF ? "IDNF " : "", | |
2dcb407e | 2277 | res->feature & ATA_ABORTED ? "ABRT " : ""); |
022bdb07 TH |
2278 | } |
2279 | } | |
2280 | ||
9b1e2658 TH |
2281 | /** |
2282 | * ata_eh_report - report error handling to user | |
2283 | * @ap: ATA port to report EH about | |
2284 | * | |
2285 | * Report EH to user. | |
2286 | * | |
2287 | * LOCKING: | |
2288 | * None. | |
2289 | */ | |
fb7fd614 | 2290 | void ata_eh_report(struct ata_port *ap) |
9b1e2658 TH |
2291 | { |
2292 | struct ata_link *link; | |
2293 | ||
1eca4365 | 2294 | ata_for_each_link(link, ap, HOST_FIRST) |
9b1e2658 TH |
2295 | ata_eh_link_report(link); |
2296 | } | |
2297 | ||
cc0680a5 | 2298 | static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, |
b1c72916 TH |
2299 | unsigned int *classes, unsigned long deadline, |
2300 | bool clear_classes) | |
d87fa38e | 2301 | { |
f58229f8 | 2302 | struct ata_device *dev; |
d87fa38e | 2303 | |
b1c72916 | 2304 | if (clear_classes) |
1eca4365 | 2305 | ata_for_each_dev(dev, link, ALL) |
b1c72916 | 2306 | classes[dev->devno] = ATA_DEV_UNKNOWN; |
d87fa38e | 2307 | |
f046519f | 2308 | return reset(link, classes, deadline); |
d87fa38e TH |
2309 | } |
2310 | ||
ae791c05 | 2311 | static int ata_eh_followup_srst_needed(struct ata_link *link, |
5dbfc9cb | 2312 | int rc, const unsigned int *classes) |
664faf09 | 2313 | { |
45db2f6c | 2314 | if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link)) |
ae791c05 | 2315 | return 0; |
5dbfc9cb TH |
2316 | if (rc == -EAGAIN) |
2317 | return 1; | |
071f44b1 | 2318 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) |
3495de73 | 2319 | return 1; |
664faf09 TH |
2320 | return 0; |
2321 | } | |
2322 | ||
fb7fd614 TH |
2323 | int ata_eh_reset(struct ata_link *link, int classify, |
2324 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
2325 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
022bdb07 | 2326 | { |
afaa5c37 | 2327 | struct ata_port *ap = link->ap; |
b1c72916 | 2328 | struct ata_link *slave = ap->slave_link; |
936fd732 | 2329 | struct ata_eh_context *ehc = &link->eh_context; |
705d2014 | 2330 | struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL; |
664faf09 | 2331 | unsigned int *classes = ehc->classes; |
416dc9ed | 2332 | unsigned int lflags = link->flags; |
1cdaf534 | 2333 | int verbose = !(ehc->i.flags & ATA_EHI_QUIET); |
d8af0eb6 | 2334 | int max_tries = 0, try = 0; |
b1c72916 | 2335 | struct ata_link *failed_link; |
f58229f8 | 2336 | struct ata_device *dev; |
416dc9ed | 2337 | unsigned long deadline, now; |
022bdb07 | 2338 | ata_reset_fn_t reset; |
afaa5c37 | 2339 | unsigned long flags; |
416dc9ed | 2340 | u32 sstatus; |
b1c72916 | 2341 | int nr_unknown, rc; |
022bdb07 | 2342 | |
932648b0 TH |
2343 | /* |
2344 | * Prepare to reset | |
2345 | */ | |
d8af0eb6 TH |
2346 | while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX) |
2347 | max_tries++; | |
05944bdf TH |
2348 | if (link->flags & ATA_LFLAG_NO_HRST) |
2349 | hardreset = NULL; | |
2350 | if (link->flags & ATA_LFLAG_NO_SRST) | |
2351 | softreset = NULL; | |
d8af0eb6 | 2352 | |
19b72321 TH |
2353 | /* make sure each reset attemp is at least COOL_DOWN apart */ |
2354 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
2355 | now = jiffies; | |
2356 | WARN_ON(time_after(ehc->last_reset, now)); | |
2357 | deadline = ata_deadline(ehc->last_reset, | |
2358 | ATA_EH_RESET_COOL_DOWN); | |
2359 | if (time_before(now, deadline)) | |
2360 | schedule_timeout_uninterruptible(deadline - now); | |
2361 | } | |
0a2c0f56 | 2362 | |
afaa5c37 TH |
2363 | spin_lock_irqsave(ap->lock, flags); |
2364 | ap->pflags |= ATA_PFLAG_RESETTING; | |
2365 | spin_unlock_irqrestore(ap->lock, flags); | |
2366 | ||
cf480626 | 2367 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
13abf50d | 2368 | |
1eca4365 | 2369 | ata_for_each_dev(dev, link, ALL) { |
cdeab114 TH |
2370 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2371 | * may change configuration and be in PIO0 timing. If | |
2372 | * we do a hard reset (or are coming from power on) | |
2373 | * this is true for ATA or ATAPI. Until we've set a | |
2374 | * suitable controller mode we should not touch the | |
2375 | * bus as we may be talking too fast. | |
2376 | */ | |
2377 | dev->pio_mode = XFER_PIO_0; | |
2378 | ||
2379 | /* If the controller has a pio mode setup function | |
2380 | * then use it to set the chipset to rights. Don't | |
2381 | * touch the DMA setup as that will be dealt with when | |
2382 | * configuring devices. | |
2383 | */ | |
2384 | if (ap->ops->set_piomode) | |
2385 | ap->ops->set_piomode(ap, dev); | |
2386 | } | |
2387 | ||
cf480626 | 2388 | /* prefer hardreset */ |
932648b0 | 2389 | reset = NULL; |
cf480626 TH |
2390 | ehc->i.action &= ~ATA_EH_RESET; |
2391 | if (hardreset) { | |
2392 | reset = hardreset; | |
a674050e | 2393 | ehc->i.action |= ATA_EH_HARDRESET; |
4f7faa3f | 2394 | } else if (softreset) { |
cf480626 | 2395 | reset = softreset; |
a674050e | 2396 | ehc->i.action |= ATA_EH_SOFTRESET; |
cf480626 | 2397 | } |
f5914a46 TH |
2398 | |
2399 | if (prereset) { | |
b1c72916 TH |
2400 | unsigned long deadline = ata_deadline(jiffies, |
2401 | ATA_EH_PRERESET_TIMEOUT); | |
2402 | ||
2403 | if (slave) { | |
2404 | sehc->i.action &= ~ATA_EH_RESET; | |
2405 | sehc->i.action |= ehc->i.action; | |
2406 | } | |
2407 | ||
2408 | rc = prereset(link, deadline); | |
2409 | ||
2410 | /* If present, do prereset on slave link too. Reset | |
2411 | * is skipped iff both master and slave links report | |
2412 | * -ENOENT or clear ATA_EH_RESET. | |
2413 | */ | |
2414 | if (slave && (rc == 0 || rc == -ENOENT)) { | |
2415 | int tmp; | |
2416 | ||
2417 | tmp = prereset(slave, deadline); | |
2418 | if (tmp != -ENOENT) | |
2419 | rc = tmp; | |
2420 | ||
2421 | ehc->i.action |= sehc->i.action; | |
2422 | } | |
2423 | ||
f5914a46 | 2424 | if (rc) { |
c961922b | 2425 | if (rc == -ENOENT) { |
cc0680a5 | 2426 | ata_link_printk(link, KERN_DEBUG, |
4aa9ab67 | 2427 | "port disabled. ignoring.\n"); |
cf480626 | 2428 | ehc->i.action &= ~ATA_EH_RESET; |
4aa9ab67 | 2429 | |
1eca4365 | 2430 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2431 | classes[dev->devno] = ATA_DEV_NONE; |
4aa9ab67 TH |
2432 | |
2433 | rc = 0; | |
c961922b | 2434 | } else |
cc0680a5 | 2435 | ata_link_printk(link, KERN_ERR, |
f5914a46 | 2436 | "prereset failed (errno=%d)\n", rc); |
fccb6ea5 | 2437 | goto out; |
f5914a46 | 2438 | } |
f5914a46 | 2439 | |
932648b0 | 2440 | /* prereset() might have cleared ATA_EH_RESET. If so, |
d6515e6f | 2441 | * bang classes, thaw and return. |
932648b0 TH |
2442 | */ |
2443 | if (reset && !(ehc->i.action & ATA_EH_RESET)) { | |
1eca4365 | 2444 | ata_for_each_dev(dev, link, ALL) |
932648b0 | 2445 | classes[dev->devno] = ATA_DEV_NONE; |
d6515e6f TH |
2446 | if ((ap->pflags & ATA_PFLAG_FROZEN) && |
2447 | ata_is_host_link(link)) | |
2448 | ata_eh_thaw_port(ap); | |
932648b0 TH |
2449 | rc = 0; |
2450 | goto out; | |
2451 | } | |
f5914a46 TH |
2452 | } |
2453 | ||
022bdb07 | 2454 | retry: |
932648b0 TH |
2455 | /* |
2456 | * Perform reset | |
2457 | */ | |
dc98c32c TH |
2458 | if (ata_is_host_link(link)) |
2459 | ata_eh_freeze_port(ap); | |
2460 | ||
341c2c95 | 2461 | deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]); |
31daabda | 2462 | |
932648b0 TH |
2463 | if (reset) { |
2464 | if (verbose) | |
2465 | ata_link_printk(link, KERN_INFO, "%s resetting link\n", | |
2466 | reset == softreset ? "soft" : "hard"); | |
2467 | ||
2468 | /* mark that this EH session started with reset */ | |
19b72321 | 2469 | ehc->last_reset = jiffies; |
932648b0 TH |
2470 | if (reset == hardreset) |
2471 | ehc->i.flags |= ATA_EHI_DID_HARDRESET; | |
2472 | else | |
2473 | ehc->i.flags |= ATA_EHI_DID_SOFTRESET; | |
022bdb07 | 2474 | |
b1c72916 TH |
2475 | rc = ata_do_reset(link, reset, classes, deadline, true); |
2476 | if (rc && rc != -EAGAIN) { | |
2477 | failed_link = link; | |
5dbfc9cb | 2478 | goto fail; |
b1c72916 TH |
2479 | } |
2480 | ||
2481 | /* hardreset slave link if existent */ | |
2482 | if (slave && reset == hardreset) { | |
2483 | int tmp; | |
2484 | ||
2485 | if (verbose) | |
2486 | ata_link_printk(slave, KERN_INFO, | |
2487 | "hard resetting link\n"); | |
2488 | ||
2489 | ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); | |
2490 | tmp = ata_do_reset(slave, reset, classes, deadline, | |
2491 | false); | |
2492 | switch (tmp) { | |
2493 | case -EAGAIN: | |
2494 | rc = -EAGAIN; | |
2495 | case 0: | |
2496 | break; | |
2497 | default: | |
2498 | failed_link = slave; | |
2499 | rc = tmp; | |
2500 | goto fail; | |
2501 | } | |
2502 | } | |
022bdb07 | 2503 | |
b1c72916 | 2504 | /* perform follow-up SRST if necessary */ |
932648b0 | 2505 | if (reset == hardreset && |
5dbfc9cb | 2506 | ata_eh_followup_srst_needed(link, rc, classes)) { |
932648b0 | 2507 | reset = softreset; |
022bdb07 | 2508 | |
932648b0 TH |
2509 | if (!reset) { |
2510 | ata_link_printk(link, KERN_ERR, | |
2511 | "follow-up softreset required " | |
2512 | "but no softreset avaliable\n"); | |
b1c72916 | 2513 | failed_link = link; |
932648b0 TH |
2514 | rc = -EINVAL; |
2515 | goto fail; | |
2516 | } | |
664faf09 | 2517 | |
932648b0 | 2518 | ata_eh_about_to_do(link, NULL, ATA_EH_RESET); |
b1c72916 | 2519 | rc = ata_do_reset(link, reset, classes, deadline, true); |
fe2c4d01 TH |
2520 | if (rc) { |
2521 | failed_link = link; | |
2522 | goto fail; | |
2523 | } | |
664faf09 | 2524 | } |
932648b0 TH |
2525 | } else { |
2526 | if (verbose) | |
2527 | ata_link_printk(link, KERN_INFO, "no reset method " | |
2528 | "available, skipping reset\n"); | |
2529 | if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) | |
2530 | lflags |= ATA_LFLAG_ASSUME_ATA; | |
664faf09 TH |
2531 | } |
2532 | ||
932648b0 TH |
2533 | /* |
2534 | * Post-reset processing | |
2535 | */ | |
1eca4365 | 2536 | ata_for_each_dev(dev, link, ALL) { |
416dc9ed TH |
2537 | /* After the reset, the device state is PIO 0 and the |
2538 | * controller state is undefined. Reset also wakes up | |
2539 | * drives from sleeping mode. | |
2540 | */ | |
2541 | dev->pio_mode = XFER_PIO_0; | |
2542 | dev->flags &= ~ATA_DFLAG_SLEEPING; | |
31daabda | 2543 | |
816ab897 TH |
2544 | if (!ata_phys_link_offline(ata_dev_phys_link(dev))) { |
2545 | /* apply class override */ | |
2546 | if (lflags & ATA_LFLAG_ASSUME_ATA) | |
2547 | classes[dev->devno] = ATA_DEV_ATA; | |
2548 | else if (lflags & ATA_LFLAG_ASSUME_SEMB) | |
2549 | classes[dev->devno] = ATA_DEV_SEMB_UNSUP; | |
2550 | } else | |
2551 | classes[dev->devno] = ATA_DEV_NONE; | |
022bdb07 TH |
2552 | } |
2553 | ||
416dc9ed TH |
2554 | /* record current link speed */ |
2555 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) | |
2556 | link->sata_spd = (sstatus >> 4) & 0xf; | |
b1c72916 TH |
2557 | if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) |
2558 | slave->sata_spd = (sstatus >> 4) & 0xf; | |
008a7896 | 2559 | |
dc98c32c TH |
2560 | /* thaw the port */ |
2561 | if (ata_is_host_link(link)) | |
2562 | ata_eh_thaw_port(ap); | |
2563 | ||
f046519f TH |
2564 | /* postreset() should clear hardware SError. Although SError |
2565 | * is cleared during link resume, clearing SError here is | |
2566 | * necessary as some PHYs raise hotplug events after SRST. | |
2567 | * This introduces race condition where hotplug occurs between | |
2568 | * reset and here. This race is mediated by cross checking | |
2569 | * link onlineness and classification result later. | |
2570 | */ | |
b1c72916 | 2571 | if (postreset) { |
416dc9ed | 2572 | postreset(link, classes); |
b1c72916 TH |
2573 | if (slave) |
2574 | postreset(slave, classes); | |
2575 | } | |
20952b69 | 2576 | |
f046519f TH |
2577 | /* clear cached SError */ |
2578 | spin_lock_irqsave(link->ap->lock, flags); | |
2579 | link->eh_info.serror = 0; | |
b1c72916 TH |
2580 | if (slave) |
2581 | slave->eh_info.serror = 0; | |
f046519f TH |
2582 | spin_unlock_irqrestore(link->ap->lock, flags); |
2583 | ||
2584 | /* Make sure onlineness and classification result correspond. | |
2585 | * Hotplug could have happened during reset and some | |
2586 | * controllers fail to wait while a drive is spinning up after | |
2587 | * being hotplugged causing misdetection. By cross checking | |
2588 | * link onlineness and classification result, those conditions | |
2589 | * can be reliably detected and retried. | |
2590 | */ | |
b1c72916 | 2591 | nr_unknown = 0; |
1eca4365 | 2592 | ata_for_each_dev(dev, link, ALL) { |
f046519f | 2593 | /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */ |
b1c72916 | 2594 | if (classes[dev->devno] == ATA_DEV_UNKNOWN) { |
f046519f | 2595 | classes[dev->devno] = ATA_DEV_NONE; |
b1c72916 TH |
2596 | if (ata_phys_link_online(ata_dev_phys_link(dev))) |
2597 | nr_unknown++; | |
2598 | } | |
f046519f TH |
2599 | } |
2600 | ||
b1c72916 | 2601 | if (classify && nr_unknown) { |
f046519f TH |
2602 | if (try < max_tries) { |
2603 | ata_link_printk(link, KERN_WARNING, "link online but " | |
2604 | "device misclassified, retrying\n"); | |
b1c72916 | 2605 | failed_link = link; |
f046519f TH |
2606 | rc = -EAGAIN; |
2607 | goto fail; | |
2608 | } | |
2609 | ata_link_printk(link, KERN_WARNING, | |
2610 | "link online but device misclassified, " | |
2611 | "device detection might fail\n"); | |
2612 | } | |
2613 | ||
416dc9ed | 2614 | /* reset successful, schedule revalidation */ |
cf480626 | 2615 | ata_eh_done(link, NULL, ATA_EH_RESET); |
b1c72916 TH |
2616 | if (slave) |
2617 | ata_eh_done(slave, NULL, ATA_EH_RESET); | |
19b72321 | 2618 | ehc->last_reset = jiffies; /* update to completion time */ |
416dc9ed | 2619 | ehc->i.action |= ATA_EH_REVALIDATE; |
ae791c05 | 2620 | |
416dc9ed | 2621 | rc = 0; |
fccb6ea5 TH |
2622 | out: |
2623 | /* clear hotplug flag */ | |
2624 | ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
b1c72916 TH |
2625 | if (slave) |
2626 | sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; | |
afaa5c37 TH |
2627 | |
2628 | spin_lock_irqsave(ap->lock, flags); | |
2629 | ap->pflags &= ~ATA_PFLAG_RESETTING; | |
2630 | spin_unlock_irqrestore(ap->lock, flags); | |
2631 | ||
022bdb07 | 2632 | return rc; |
416dc9ed TH |
2633 | |
2634 | fail: | |
5958e302 TH |
2635 | /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */ |
2636 | if (!ata_is_host_link(link) && | |
2637 | sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2638 | rc = -ERESTART; | |
2639 | ||
416dc9ed TH |
2640 | if (rc == -ERESTART || try >= max_tries) |
2641 | goto out; | |
2642 | ||
2643 | now = jiffies; | |
2644 | if (time_before(now, deadline)) { | |
2645 | unsigned long delta = deadline - now; | |
2646 | ||
b1c72916 | 2647 | ata_link_printk(failed_link, KERN_WARNING, |
0a2c0f56 TH |
2648 | "reset failed (errno=%d), retrying in %u secs\n", |
2649 | rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); | |
416dc9ed TH |
2650 | |
2651 | while (delta) | |
2652 | delta = schedule_timeout_uninterruptible(delta); | |
2653 | } | |
2654 | ||
b1c72916 | 2655 | if (try == max_tries - 1) { |
a07d499b | 2656 | sata_down_spd_limit(link, 0); |
b1c72916 | 2657 | if (slave) |
a07d499b | 2658 | sata_down_spd_limit(slave, 0); |
b1c72916 | 2659 | } else if (rc == -EPIPE) |
a07d499b | 2660 | sata_down_spd_limit(failed_link, 0); |
b1c72916 | 2661 | |
416dc9ed TH |
2662 | if (hardreset) |
2663 | reset = hardreset; | |
2664 | goto retry; | |
022bdb07 TH |
2665 | } |
2666 | ||
45fabbb7 EO |
2667 | static inline void ata_eh_pull_park_action(struct ata_port *ap) |
2668 | { | |
2669 | struct ata_link *link; | |
2670 | struct ata_device *dev; | |
2671 | unsigned long flags; | |
2672 | ||
2673 | /* | |
2674 | * This function can be thought of as an extended version of | |
2675 | * ata_eh_about_to_do() specially crafted to accommodate the | |
2676 | * requirements of ATA_EH_PARK handling. Since the EH thread | |
2677 | * does not leave the do {} while () loop in ata_eh_recover as | |
2678 | * long as the timeout for a park request to *one* device on | |
2679 | * the port has not expired, and since we still want to pick | |
2680 | * up park requests to other devices on the same port or | |
2681 | * timeout updates for the same device, we have to pull | |
2682 | * ATA_EH_PARK actions from eh_info into eh_context.i | |
2683 | * ourselves at the beginning of each pass over the loop. | |
2684 | * | |
2685 | * Additionally, all write accesses to &ap->park_req_pending | |
2686 | * through INIT_COMPLETION() (see below) or complete_all() | |
2687 | * (see ata_scsi_park_store()) are protected by the host lock. | |
2688 | * As a result we have that park_req_pending.done is zero on | |
2689 | * exit from this function, i.e. when ATA_EH_PARK actions for | |
2690 | * *all* devices on port ap have been pulled into the | |
2691 | * respective eh_context structs. If, and only if, | |
2692 | * park_req_pending.done is non-zero by the time we reach | |
2693 | * wait_for_completion_timeout(), another ATA_EH_PARK action | |
2694 | * has been scheduled for at least one of the devices on port | |
2695 | * ap and we have to cycle over the do {} while () loop in | |
2696 | * ata_eh_recover() again. | |
2697 | */ | |
2698 | ||
2699 | spin_lock_irqsave(ap->lock, flags); | |
2700 | INIT_COMPLETION(ap->park_req_pending); | |
1eca4365 TH |
2701 | ata_for_each_link(link, ap, EDGE) { |
2702 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
2703 | struct ata_eh_info *ehi = &link->eh_info; |
2704 | ||
2705 | link->eh_context.i.dev_action[dev->devno] |= | |
2706 | ehi->dev_action[dev->devno] & ATA_EH_PARK; | |
2707 | ata_eh_clear_action(link, dev, ehi, ATA_EH_PARK); | |
2708 | } | |
2709 | } | |
2710 | spin_unlock_irqrestore(ap->lock, flags); | |
2711 | } | |
2712 | ||
2713 | static void ata_eh_park_issue_cmd(struct ata_device *dev, int park) | |
2714 | { | |
2715 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2716 | struct ata_taskfile tf; | |
2717 | unsigned int err_mask; | |
2718 | ||
2719 | ata_tf_init(dev, &tf); | |
2720 | if (park) { | |
2721 | ehc->unloaded_mask |= 1 << dev->devno; | |
2722 | tf.command = ATA_CMD_IDLEIMMEDIATE; | |
2723 | tf.feature = 0x44; | |
2724 | tf.lbal = 0x4c; | |
2725 | tf.lbam = 0x4e; | |
2726 | tf.lbah = 0x55; | |
2727 | } else { | |
2728 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2729 | tf.command = ATA_CMD_CHK_POWER; | |
2730 | } | |
2731 | ||
2732 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
2733 | tf.protocol |= ATA_PROT_NODATA; | |
2734 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); | |
2735 | if (park && (err_mask || tf.lbal != 0xc4)) { | |
2736 | ata_dev_printk(dev, KERN_ERR, "head unload failed!\n"); | |
2737 | ehc->unloaded_mask &= ~(1 << dev->devno); | |
2738 | } | |
2739 | } | |
2740 | ||
0260731f | 2741 | static int ata_eh_revalidate_and_attach(struct ata_link *link, |
084fe639 | 2742 | struct ata_device **r_failed_dev) |
022bdb07 | 2743 | { |
0260731f TH |
2744 | struct ata_port *ap = link->ap; |
2745 | struct ata_eh_context *ehc = &link->eh_context; | |
022bdb07 | 2746 | struct ata_device *dev; |
8c3c52a8 | 2747 | unsigned int new_mask = 0; |
084fe639 | 2748 | unsigned long flags; |
f58229f8 | 2749 | int rc = 0; |
022bdb07 TH |
2750 | |
2751 | DPRINTK("ENTER\n"); | |
2752 | ||
8c3c52a8 TH |
2753 | /* For PATA drive side cable detection to work, IDENTIFY must |
2754 | * be done backwards such that PDIAG- is released by the slave | |
2755 | * device before the master device is identified. | |
2756 | */ | |
1eca4365 | 2757 | ata_for_each_dev(dev, link, ALL_REVERSE) { |
f58229f8 TH |
2758 | unsigned int action = ata_eh_dev_action(dev); |
2759 | unsigned int readid_flags = 0; | |
022bdb07 | 2760 | |
bff04647 TH |
2761 | if (ehc->i.flags & ATA_EHI_DID_RESET) |
2762 | readid_flags |= ATA_READID_POSTRESET; | |
2763 | ||
9666f400 | 2764 | if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { |
633273a3 TH |
2765 | WARN_ON(dev->class == ATA_DEV_PMP); |
2766 | ||
b1c72916 | 2767 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) { |
022bdb07 | 2768 | rc = -EIO; |
8c3c52a8 | 2769 | goto err; |
022bdb07 TH |
2770 | } |
2771 | ||
0260731f | 2772 | ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE); |
422c9daa TH |
2773 | rc = ata_dev_revalidate(dev, ehc->classes[dev->devno], |
2774 | readid_flags); | |
022bdb07 | 2775 | if (rc) |
8c3c52a8 | 2776 | goto err; |
022bdb07 | 2777 | |
0260731f | 2778 | ata_eh_done(link, dev, ATA_EH_REVALIDATE); |
47005f25 | 2779 | |
baa1e78a TH |
2780 | /* Configuration may have changed, reconfigure |
2781 | * transfer mode. | |
2782 | */ | |
2783 | ehc->i.flags |= ATA_EHI_SETMODE; | |
2784 | ||
3057ac3c | 2785 | /* schedule the scsi_rescan_device() here */ |
2786 | queue_work(ata_aux_wq, &(ap->scsi_rescan_task)); | |
084fe639 TH |
2787 | } else if (dev->class == ATA_DEV_UNKNOWN && |
2788 | ehc->tries[dev->devno] && | |
2789 | ata_class_enabled(ehc->classes[dev->devno])) { | |
842faa6c TH |
2790 | /* Temporarily set dev->class, it will be |
2791 | * permanently set once all configurations are | |
2792 | * complete. This is necessary because new | |
2793 | * device configuration is done in two | |
2794 | * separate loops. | |
2795 | */ | |
084fe639 TH |
2796 | dev->class = ehc->classes[dev->devno]; |
2797 | ||
633273a3 TH |
2798 | if (dev->class == ATA_DEV_PMP) |
2799 | rc = sata_pmp_attach(dev); | |
2800 | else | |
2801 | rc = ata_dev_read_id(dev, &dev->class, | |
2802 | readid_flags, dev->id); | |
842faa6c TH |
2803 | |
2804 | /* read_id might have changed class, store and reset */ | |
2805 | ehc->classes[dev->devno] = dev->class; | |
2806 | dev->class = ATA_DEV_UNKNOWN; | |
2807 | ||
8c3c52a8 TH |
2808 | switch (rc) { |
2809 | case 0: | |
99cf610a TH |
2810 | /* clear error info accumulated during probe */ |
2811 | ata_ering_clear(&dev->ering); | |
f58229f8 | 2812 | new_mask |= 1 << dev->devno; |
8c3c52a8 TH |
2813 | break; |
2814 | case -ENOENT: | |
55a8e2c8 TH |
2815 | /* IDENTIFY was issued to non-existent |
2816 | * device. No need to reset. Just | |
842faa6c | 2817 | * thaw and ignore the device. |
55a8e2c8 TH |
2818 | */ |
2819 | ata_eh_thaw_port(ap); | |
084fe639 | 2820 | break; |
8c3c52a8 | 2821 | default: |
8c3c52a8 | 2822 | goto err; |
084fe639 | 2823 | } |
8c3c52a8 TH |
2824 | } |
2825 | } | |
084fe639 | 2826 | |
c1c4e8d5 | 2827 | /* PDIAG- should have been released, ask cable type if post-reset */ |
33267325 TH |
2828 | if ((ehc->i.flags & ATA_EHI_DID_RESET) && ata_is_host_link(link)) { |
2829 | if (ap->ops->cable_detect) | |
2830 | ap->cbl = ap->ops->cable_detect(ap); | |
2831 | ata_force_cbl(ap); | |
2832 | } | |
c1c4e8d5 | 2833 | |
8c3c52a8 TH |
2834 | /* Configure new devices forward such that user doesn't see |
2835 | * device detection messages backwards. | |
2836 | */ | |
1eca4365 | 2837 | ata_for_each_dev(dev, link, ALL) { |
633273a3 TH |
2838 | if (!(new_mask & (1 << dev->devno)) || |
2839 | dev->class == ATA_DEV_PMP) | |
8c3c52a8 TH |
2840 | continue; |
2841 | ||
842faa6c TH |
2842 | dev->class = ehc->classes[dev->devno]; |
2843 | ||
8c3c52a8 TH |
2844 | ehc->i.flags |= ATA_EHI_PRINTINFO; |
2845 | rc = ata_dev_configure(dev); | |
2846 | ehc->i.flags &= ~ATA_EHI_PRINTINFO; | |
842faa6c TH |
2847 | if (rc) { |
2848 | dev->class = ATA_DEV_UNKNOWN; | |
8c3c52a8 | 2849 | goto err; |
842faa6c | 2850 | } |
8c3c52a8 TH |
2851 | |
2852 | spin_lock_irqsave(ap->lock, flags); | |
2853 | ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG; | |
2854 | spin_unlock_irqrestore(ap->lock, flags); | |
2855 | ||
2856 | /* new device discovered, configure xfermode */ | |
2857 | ehc->i.flags |= ATA_EHI_SETMODE; | |
022bdb07 TH |
2858 | } |
2859 | ||
8c3c52a8 | 2860 | return 0; |
022bdb07 | 2861 | |
8c3c52a8 TH |
2862 | err: |
2863 | *r_failed_dev = dev; | |
2864 | DPRINTK("EXIT rc=%d\n", rc); | |
022bdb07 TH |
2865 | return rc; |
2866 | } | |
2867 | ||
6f1d1e3a TH |
2868 | /** |
2869 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2870 | * @link: link on which timings will be programmed | |
98a1708d | 2871 | * @r_failed_dev: out parameter for failed device |
6f1d1e3a TH |
2872 | * |
2873 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2874 | * ata_set_mode() fails, pointer to the failing device is | |
2875 | * returned in @r_failed_dev. | |
2876 | * | |
2877 | * LOCKING: | |
2878 | * PCI/etc. bus probe sem. | |
2879 | * | |
2880 | * RETURNS: | |
2881 | * 0 on success, negative errno otherwise | |
2882 | */ | |
2883 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
2884 | { | |
2885 | struct ata_port *ap = link->ap; | |
00115e0f TH |
2886 | struct ata_device *dev; |
2887 | int rc; | |
6f1d1e3a | 2888 | |
76326ac1 | 2889 | /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ |
1eca4365 | 2890 | ata_for_each_dev(dev, link, ENABLED) { |
76326ac1 TH |
2891 | if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { |
2892 | struct ata_ering_entry *ent; | |
2893 | ||
2894 | ent = ata_ering_top(&dev->ering); | |
2895 | if (ent) | |
2896 | ent->eflags &= ~ATA_EFLAG_DUBIOUS_XFER; | |
2897 | } | |
2898 | } | |
2899 | ||
6f1d1e3a TH |
2900 | /* has private set_mode? */ |
2901 | if (ap->ops->set_mode) | |
00115e0f TH |
2902 | rc = ap->ops->set_mode(link, r_failed_dev); |
2903 | else | |
2904 | rc = ata_do_set_mode(link, r_failed_dev); | |
2905 | ||
2906 | /* if transfer mode has changed, set DUBIOUS_XFER on device */ | |
1eca4365 | 2907 | ata_for_each_dev(dev, link, ENABLED) { |
00115e0f TH |
2908 | struct ata_eh_context *ehc = &link->eh_context; |
2909 | u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; | |
2910 | u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); | |
2911 | ||
2912 | if (dev->xfer_mode != saved_xfer_mode || | |
2913 | ata_ncq_enabled(dev) != saved_ncq) | |
2914 | dev->flags |= ATA_DFLAG_DUBIOUS_XFER; | |
2915 | } | |
2916 | ||
2917 | return rc; | |
6f1d1e3a TH |
2918 | } |
2919 | ||
11fc33da TH |
2920 | /** |
2921 | * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset | |
2922 | * @dev: ATAPI device to clear UA for | |
2923 | * | |
2924 | * Resets and other operations can make an ATAPI device raise | |
2925 | * UNIT ATTENTION which causes the next operation to fail. This | |
2926 | * function clears UA. | |
2927 | * | |
2928 | * LOCKING: | |
2929 | * EH context (may sleep). | |
2930 | * | |
2931 | * RETURNS: | |
2932 | * 0 on success, -errno on failure. | |
2933 | */ | |
2934 | static int atapi_eh_clear_ua(struct ata_device *dev) | |
2935 | { | |
2936 | int i; | |
2937 | ||
2938 | for (i = 0; i < ATA_EH_UA_TRIES; i++) { | |
b5357081 | 2939 | u8 *sense_buffer = dev->link->ap->sector_buf; |
11fc33da TH |
2940 | u8 sense_key = 0; |
2941 | unsigned int err_mask; | |
2942 | ||
2943 | err_mask = atapi_eh_tur(dev, &sense_key); | |
2944 | if (err_mask != 0 && err_mask != AC_ERR_DEV) { | |
2945 | ata_dev_printk(dev, KERN_WARNING, "TEST_UNIT_READY " | |
2946 | "failed (err_mask=0x%x)\n", err_mask); | |
2947 | return -EIO; | |
2948 | } | |
2949 | ||
2950 | if (!err_mask || sense_key != UNIT_ATTENTION) | |
2951 | return 0; | |
2952 | ||
2953 | err_mask = atapi_eh_request_sense(dev, sense_buffer, sense_key); | |
2954 | if (err_mask) { | |
2955 | ata_dev_printk(dev, KERN_WARNING, "failed to clear " | |
2956 | "UNIT ATTENTION (err_mask=0x%x)\n", err_mask); | |
2957 | return -EIO; | |
2958 | } | |
2959 | } | |
2960 | ||
2961 | ata_dev_printk(dev, KERN_WARNING, | |
2962 | "UNIT ATTENTION persists after %d tries\n", ATA_EH_UA_TRIES); | |
2963 | ||
2964 | return 0; | |
2965 | } | |
2966 | ||
0260731f | 2967 | static int ata_link_nr_enabled(struct ata_link *link) |
022bdb07 | 2968 | { |
f58229f8 TH |
2969 | struct ata_device *dev; |
2970 | int cnt = 0; | |
022bdb07 | 2971 | |
1eca4365 TH |
2972 | ata_for_each_dev(dev, link, ENABLED) |
2973 | cnt++; | |
022bdb07 TH |
2974 | return cnt; |
2975 | } | |
2976 | ||
0260731f | 2977 | static int ata_link_nr_vacant(struct ata_link *link) |
084fe639 | 2978 | { |
f58229f8 TH |
2979 | struct ata_device *dev; |
2980 | int cnt = 0; | |
084fe639 | 2981 | |
1eca4365 | 2982 | ata_for_each_dev(dev, link, ALL) |
f58229f8 | 2983 | if (dev->class == ATA_DEV_UNKNOWN) |
084fe639 TH |
2984 | cnt++; |
2985 | return cnt; | |
2986 | } | |
2987 | ||
0260731f | 2988 | static int ata_eh_skip_recovery(struct ata_link *link) |
084fe639 | 2989 | { |
672b2d65 | 2990 | struct ata_port *ap = link->ap; |
0260731f | 2991 | struct ata_eh_context *ehc = &link->eh_context; |
f58229f8 | 2992 | struct ata_device *dev; |
084fe639 | 2993 | |
f9df58cb TH |
2994 | /* skip disabled links */ |
2995 | if (link->flags & ATA_LFLAG_DISABLED) | |
2996 | return 1; | |
2997 | ||
672b2d65 TH |
2998 | /* thaw frozen port and recover failed devices */ |
2999 | if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link)) | |
3000 | return 0; | |
3001 | ||
3002 | /* reset at least once if reset is requested */ | |
3003 | if ((ehc->i.action & ATA_EH_RESET) && | |
3004 | !(ehc->i.flags & ATA_EHI_DID_RESET)) | |
084fe639 TH |
3005 | return 0; |
3006 | ||
3007 | /* skip if class codes for all vacant slots are ATA_DEV_NONE */ | |
1eca4365 | 3008 | ata_for_each_dev(dev, link, ALL) { |
084fe639 TH |
3009 | if (dev->class == ATA_DEV_UNKNOWN && |
3010 | ehc->classes[dev->devno] != ATA_DEV_NONE) | |
3011 | return 0; | |
3012 | } | |
3013 | ||
3014 | return 1; | |
3015 | } | |
3016 | ||
c2c7a89c TH |
3017 | static int ata_count_probe_trials_cb(struct ata_ering_entry *ent, void *void_arg) |
3018 | { | |
3019 | u64 interval = msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL); | |
3020 | u64 now = get_jiffies_64(); | |
3021 | int *trials = void_arg; | |
3022 | ||
3023 | if (ent->timestamp < now - min(now, interval)) | |
3024 | return -1; | |
3025 | ||
3026 | (*trials)++; | |
3027 | return 0; | |
3028 | } | |
3029 | ||
02c05a27 TH |
3030 | static int ata_eh_schedule_probe(struct ata_device *dev) |
3031 | { | |
3032 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
c2c7a89c TH |
3033 | struct ata_link *link = ata_dev_phys_link(dev); |
3034 | int trials = 0; | |
02c05a27 TH |
3035 | |
3036 | if (!(ehc->i.probe_mask & (1 << dev->devno)) || | |
3037 | (ehc->did_probe_mask & (1 << dev->devno))) | |
3038 | return 0; | |
3039 | ||
3040 | ata_eh_detach_dev(dev); | |
3041 | ata_dev_init(dev); | |
3042 | ehc->did_probe_mask |= (1 << dev->devno); | |
cf480626 | 3043 | ehc->i.action |= ATA_EH_RESET; |
00115e0f TH |
3044 | ehc->saved_xfer_mode[dev->devno] = 0; |
3045 | ehc->saved_ncq_enabled &= ~(1 << dev->devno); | |
02c05a27 | 3046 | |
c2c7a89c TH |
3047 | /* Record and count probe trials on the ering. The specific |
3048 | * error mask used is irrelevant. Because a successful device | |
3049 | * detection clears the ering, this count accumulates only if | |
3050 | * there are consecutive failed probes. | |
3051 | * | |
3052 | * If the count is equal to or higher than ATA_EH_PROBE_TRIALS | |
3053 | * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is | |
3054 | * forced to 1.5Gbps. | |
3055 | * | |
3056 | * This is to work around cases where failed link speed | |
3057 | * negotiation results in device misdetection leading to | |
3058 | * infinite DEVXCHG or PHRDY CHG events. | |
3059 | */ | |
3060 | ata_ering_record(&dev->ering, 0, AC_ERR_OTHER); | |
3061 | ata_ering_map(&dev->ering, ata_count_probe_trials_cb, &trials); | |
3062 | ||
3063 | if (trials > ATA_EH_PROBE_TRIALS) | |
3064 | sata_down_spd_limit(link, 1); | |
3065 | ||
02c05a27 TH |
3066 | return 1; |
3067 | } | |
3068 | ||
9b1e2658 | 3069 | static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) |
fee7ca72 | 3070 | { |
9af5c9c9 | 3071 | struct ata_eh_context *ehc = &dev->link->eh_context; |
fee7ca72 | 3072 | |
cf9a590a TH |
3073 | /* -EAGAIN from EH routine indicates retry without prejudice. |
3074 | * The requester is responsible for ensuring forward progress. | |
3075 | */ | |
3076 | if (err != -EAGAIN) | |
3077 | ehc->tries[dev->devno]--; | |
fee7ca72 TH |
3078 | |
3079 | switch (err) { | |
3080 | case -ENODEV: | |
3081 | /* device missing or wrong IDENTIFY data, schedule probing */ | |
3082 | ehc->i.probe_mask |= (1 << dev->devno); | |
3083 | case -EINVAL: | |
3084 | /* give it just one more chance */ | |
3085 | ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1); | |
3086 | case -EIO: | |
d89293ab | 3087 | if (ehc->tries[dev->devno] == 1) { |
fee7ca72 TH |
3088 | /* This is the last chance, better to slow |
3089 | * down than lose it. | |
3090 | */ | |
a07d499b | 3091 | sata_down_spd_limit(ata_dev_phys_link(dev), 0); |
d89293ab TH |
3092 | if (dev->pio_mode > XFER_PIO_0) |
3093 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
fee7ca72 TH |
3094 | } |
3095 | } | |
3096 | ||
3097 | if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { | |
3098 | /* disable device if it has used up all its chances */ | |
3099 | ata_dev_disable(dev); | |
3100 | ||
3101 | /* detach if offline */ | |
b1c72916 | 3102 | if (ata_phys_link_offline(ata_dev_phys_link(dev))) |
fee7ca72 TH |
3103 | ata_eh_detach_dev(dev); |
3104 | ||
02c05a27 | 3105 | /* schedule probe if necessary */ |
87fbc5a0 | 3106 | if (ata_eh_schedule_probe(dev)) { |
fee7ca72 | 3107 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; |
87fbc5a0 TH |
3108 | memset(ehc->cmd_timeout_idx[dev->devno], 0, |
3109 | sizeof(ehc->cmd_timeout_idx[dev->devno])); | |
3110 | } | |
9b1e2658 TH |
3111 | |
3112 | return 1; | |
fee7ca72 | 3113 | } else { |
cf480626 | 3114 | ehc->i.action |= ATA_EH_RESET; |
9b1e2658 | 3115 | return 0; |
fee7ca72 TH |
3116 | } |
3117 | } | |
3118 | ||
022bdb07 TH |
3119 | /** |
3120 | * ata_eh_recover - recover host port after error | |
3121 | * @ap: host port to recover | |
f5914a46 | 3122 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3123 | * @softreset: softreset method (can be NULL) |
3124 | * @hardreset: hardreset method (can be NULL) | |
3125 | * @postreset: postreset method (can be NULL) | |
9b1e2658 | 3126 | * @r_failed_link: out parameter for failed link |
022bdb07 TH |
3127 | * |
3128 | * This is the alpha and omega, eum and yang, heart and soul of | |
3129 | * libata exception handling. On entry, actions required to | |
9b1e2658 TH |
3130 | * recover each link and hotplug requests are recorded in the |
3131 | * link's eh_context. This function executes all the operations | |
3132 | * with appropriate retrials and fallbacks to resurrect failed | |
084fe639 | 3133 | * devices, detach goners and greet newcomers. |
022bdb07 TH |
3134 | * |
3135 | * LOCKING: | |
3136 | * Kernel thread context (may sleep). | |
3137 | * | |
3138 | * RETURNS: | |
3139 | * 0 on success, -errno on failure. | |
3140 | */ | |
fb7fd614 TH |
3141 | int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, |
3142 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3143 | ata_postreset_fn_t postreset, | |
3144 | struct ata_link **r_failed_link) | |
022bdb07 | 3145 | { |
9b1e2658 | 3146 | struct ata_link *link; |
022bdb07 | 3147 | struct ata_device *dev; |
0a2c0f56 | 3148 | int nr_failed_devs; |
dc98c32c | 3149 | int rc; |
45fabbb7 | 3150 | unsigned long flags, deadline; |
022bdb07 TH |
3151 | |
3152 | DPRINTK("ENTER\n"); | |
3153 | ||
3154 | /* prep for recovery */ | |
1eca4365 | 3155 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3156 | struct ata_eh_context *ehc = &link->eh_context; |
084fe639 | 3157 | |
f9df58cb TH |
3158 | /* re-enable link? */ |
3159 | if (ehc->i.action & ATA_EH_ENABLE_LINK) { | |
3160 | ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK); | |
3161 | spin_lock_irqsave(ap->lock, flags); | |
3162 | link->flags &= ~ATA_LFLAG_DISABLED; | |
3163 | spin_unlock_irqrestore(ap->lock, flags); | |
3164 | ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK); | |
3165 | } | |
3166 | ||
1eca4365 | 3167 | ata_for_each_dev(dev, link, ALL) { |
fd995f70 TH |
3168 | if (link->flags & ATA_LFLAG_NO_RETRY) |
3169 | ehc->tries[dev->devno] = 1; | |
3170 | else | |
3171 | ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; | |
084fe639 | 3172 | |
9b1e2658 TH |
3173 | /* collect port action mask recorded in dev actions */ |
3174 | ehc->i.action |= ehc->i.dev_action[dev->devno] & | |
3175 | ~ATA_EH_PERDEV_MASK; | |
3176 | ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK; | |
3177 | ||
3178 | /* process hotplug request */ | |
3179 | if (dev->flags & ATA_DFLAG_DETACH) | |
3180 | ata_eh_detach_dev(dev); | |
3181 | ||
02c05a27 TH |
3182 | /* schedule probe if necessary */ |
3183 | if (!ata_dev_enabled(dev)) | |
3184 | ata_eh_schedule_probe(dev); | |
084fe639 | 3185 | } |
022bdb07 TH |
3186 | } |
3187 | ||
3188 | retry: | |
022bdb07 | 3189 | rc = 0; |
9b1e2658 | 3190 | nr_failed_devs = 0; |
022bdb07 | 3191 | |
aeb2ecd6 | 3192 | /* if UNLOADING, finish immediately */ |
b51e9e5d | 3193 | if (ap->pflags & ATA_PFLAG_UNLOADING) |
aeb2ecd6 TH |
3194 | goto out; |
3195 | ||
9b1e2658 | 3196 | /* prep for EH */ |
1eca4365 | 3197 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3198 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3199 | |
9b1e2658 TH |
3200 | /* skip EH if possible. */ |
3201 | if (ata_eh_skip_recovery(link)) | |
3202 | ehc->i.action = 0; | |
3203 | ||
1eca4365 | 3204 | ata_for_each_dev(dev, link, ALL) |
9b1e2658 TH |
3205 | ehc->classes[dev->devno] = ATA_DEV_UNKNOWN; |
3206 | } | |
084fe639 | 3207 | |
022bdb07 | 3208 | /* reset */ |
1eca4365 | 3209 | ata_for_each_link(link, ap, EDGE) { |
dc98c32c | 3210 | struct ata_eh_context *ehc = &link->eh_context; |
9b1e2658 | 3211 | |
dc98c32c TH |
3212 | if (!(ehc->i.action & ATA_EH_RESET)) |
3213 | continue; | |
9b1e2658 | 3214 | |
dc98c32c TH |
3215 | rc = ata_eh_reset(link, ata_link_nr_vacant(link), |
3216 | prereset, softreset, hardreset, postreset); | |
3217 | if (rc) { | |
3218 | ata_link_printk(link, KERN_ERR, | |
3219 | "reset failed, giving up\n"); | |
3220 | goto out; | |
022bdb07 | 3221 | } |
022bdb07 TH |
3222 | } |
3223 | ||
45fabbb7 EO |
3224 | do { |
3225 | unsigned long now; | |
3226 | ||
3227 | /* | |
3228 | * clears ATA_EH_PARK in eh_info and resets | |
3229 | * ap->park_req_pending | |
3230 | */ | |
3231 | ata_eh_pull_park_action(ap); | |
3232 | ||
3233 | deadline = jiffies; | |
1eca4365 TH |
3234 | ata_for_each_link(link, ap, EDGE) { |
3235 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3236 | struct ata_eh_context *ehc = &link->eh_context; |
3237 | unsigned long tmp; | |
3238 | ||
3239 | if (dev->class != ATA_DEV_ATA) | |
3240 | continue; | |
3241 | if (!(ehc->i.dev_action[dev->devno] & | |
3242 | ATA_EH_PARK)) | |
3243 | continue; | |
3244 | tmp = dev->unpark_deadline; | |
3245 | if (time_before(deadline, tmp)) | |
3246 | deadline = tmp; | |
3247 | else if (time_before_eq(tmp, jiffies)) | |
3248 | continue; | |
3249 | if (ehc->unloaded_mask & (1 << dev->devno)) | |
3250 | continue; | |
3251 | ||
3252 | ata_eh_park_issue_cmd(dev, 1); | |
3253 | } | |
3254 | } | |
3255 | ||
3256 | now = jiffies; | |
3257 | if (time_before_eq(deadline, now)) | |
3258 | break; | |
3259 | ||
3260 | deadline = wait_for_completion_timeout(&ap->park_req_pending, | |
3261 | deadline - now); | |
3262 | } while (deadline); | |
1eca4365 TH |
3263 | ata_for_each_link(link, ap, EDGE) { |
3264 | ata_for_each_dev(dev, link, ALL) { | |
45fabbb7 EO |
3265 | if (!(link->eh_context.unloaded_mask & |
3266 | (1 << dev->devno))) | |
3267 | continue; | |
3268 | ||
3269 | ata_eh_park_issue_cmd(dev, 0); | |
3270 | ata_eh_done(link, dev, ATA_EH_PARK); | |
3271 | } | |
3272 | } | |
3273 | ||
9b1e2658 | 3274 | /* the rest */ |
1eca4365 | 3275 | ata_for_each_link(link, ap, EDGE) { |
9b1e2658 | 3276 | struct ata_eh_context *ehc = &link->eh_context; |
022bdb07 | 3277 | |
9b1e2658 TH |
3278 | /* revalidate existing devices and attach new ones */ |
3279 | rc = ata_eh_revalidate_and_attach(link, &dev); | |
4ae72a1e | 3280 | if (rc) |
022bdb07 | 3281 | goto dev_fail; |
022bdb07 | 3282 | |
633273a3 TH |
3283 | /* if PMP got attached, return, pmp EH will take care of it */ |
3284 | if (link->device->class == ATA_DEV_PMP) { | |
3285 | ehc->i.action = 0; | |
3286 | return 0; | |
3287 | } | |
3288 | ||
9b1e2658 TH |
3289 | /* configure transfer mode if necessary */ |
3290 | if (ehc->i.flags & ATA_EHI_SETMODE) { | |
3291 | rc = ata_set_mode(link, &dev); | |
3292 | if (rc) | |
3293 | goto dev_fail; | |
3294 | ehc->i.flags &= ~ATA_EHI_SETMODE; | |
3295 | } | |
3296 | ||
11fc33da TH |
3297 | /* If reset has been issued, clear UA to avoid |
3298 | * disrupting the current users of the device. | |
3299 | */ | |
3300 | if (ehc->i.flags & ATA_EHI_DID_RESET) { | |
1eca4365 | 3301 | ata_for_each_dev(dev, link, ALL) { |
11fc33da TH |
3302 | if (dev->class != ATA_DEV_ATAPI) |
3303 | continue; | |
3304 | rc = atapi_eh_clear_ua(dev); | |
3305 | if (rc) | |
3306 | goto dev_fail; | |
3307 | } | |
3308 | } | |
3309 | ||
3310 | /* configure link power saving */ | |
3ec25ebd | 3311 | if (ehc->i.action & ATA_EH_LPM) |
1eca4365 | 3312 | ata_for_each_dev(dev, link, ALL) |
ca77329f KCA |
3313 | ata_dev_enable_pm(dev, ap->pm_policy); |
3314 | ||
9b1e2658 TH |
3315 | /* this link is okay now */ |
3316 | ehc->i.flags = 0; | |
3317 | continue; | |
022bdb07 | 3318 | |
2dcb407e | 3319 | dev_fail: |
9b1e2658 | 3320 | nr_failed_devs++; |
0a2c0f56 | 3321 | ata_eh_handle_dev_fail(dev, rc); |
022bdb07 | 3322 | |
b06ce3e5 TH |
3323 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
3324 | /* PMP reset requires working host port. | |
3325 | * Can't retry if it's frozen. | |
3326 | */ | |
071f44b1 | 3327 | if (sata_pmp_attached(ap)) |
b06ce3e5 | 3328 | goto out; |
9b1e2658 | 3329 | break; |
b06ce3e5 | 3330 | } |
022bdb07 TH |
3331 | } |
3332 | ||
0a2c0f56 | 3333 | if (nr_failed_devs) |
9b1e2658 | 3334 | goto retry; |
022bdb07 | 3335 | |
9b1e2658 TH |
3336 | out: |
3337 | if (rc && r_failed_link) | |
3338 | *r_failed_link = link; | |
3339 | ||
022bdb07 TH |
3340 | DPRINTK("EXIT, rc=%d\n", rc); |
3341 | return rc; | |
3342 | } | |
3343 | ||
3344 | /** | |
3345 | * ata_eh_finish - finish up EH | |
3346 | * @ap: host port to finish EH for | |
3347 | * | |
3348 | * Recovery is complete. Clean up EH states and retry or finish | |
3349 | * failed qcs. | |
3350 | * | |
3351 | * LOCKING: | |
3352 | * None. | |
3353 | */ | |
fb7fd614 | 3354 | void ata_eh_finish(struct ata_port *ap) |
022bdb07 TH |
3355 | { |
3356 | int tag; | |
3357 | ||
3358 | /* retry or finish qcs */ | |
3359 | for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { | |
3360 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
3361 | ||
3362 | if (!(qc->flags & ATA_QCFLAG_FAILED)) | |
3363 | continue; | |
3364 | ||
3365 | if (qc->err_mask) { | |
3366 | /* FIXME: Once EH migration is complete, | |
3367 | * generate sense data in this function, | |
3368 | * considering both err_mask and tf. | |
3369 | */ | |
03faab78 | 3370 | if (qc->flags & ATA_QCFLAG_RETRY) |
022bdb07 | 3371 | ata_eh_qc_retry(qc); |
03faab78 TH |
3372 | else |
3373 | ata_eh_qc_complete(qc); | |
022bdb07 TH |
3374 | } else { |
3375 | if (qc->flags & ATA_QCFLAG_SENSE_VALID) { | |
3376 | ata_eh_qc_complete(qc); | |
3377 | } else { | |
3378 | /* feed zero TF to sense generation */ | |
3379 | memset(&qc->result_tf, 0, sizeof(qc->result_tf)); | |
3380 | ata_eh_qc_retry(qc); | |
3381 | } | |
3382 | } | |
3383 | } | |
da917d69 TH |
3384 | |
3385 | /* make sure nr_active_links is zero after EH */ | |
3386 | WARN_ON(ap->nr_active_links); | |
3387 | ap->nr_active_links = 0; | |
022bdb07 TH |
3388 | } |
3389 | ||
3390 | /** | |
3391 | * ata_do_eh - do standard error handling | |
3392 | * @ap: host port to handle error for | |
a1efdaba | 3393 | * |
f5914a46 | 3394 | * @prereset: prereset method (can be NULL) |
022bdb07 TH |
3395 | * @softreset: softreset method (can be NULL) |
3396 | * @hardreset: hardreset method (can be NULL) | |
3397 | * @postreset: postreset method (can be NULL) | |
3398 | * | |
3399 | * Perform standard error handling sequence. | |
3400 | * | |
3401 | * LOCKING: | |
3402 | * Kernel thread context (may sleep). | |
3403 | */ | |
f5914a46 TH |
3404 | void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
3405 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, | |
3406 | ata_postreset_fn_t postreset) | |
022bdb07 | 3407 | { |
9b1e2658 TH |
3408 | struct ata_device *dev; |
3409 | int rc; | |
3410 | ||
3411 | ata_eh_autopsy(ap); | |
3412 | ata_eh_report(ap); | |
3413 | ||
3414 | rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, | |
3415 | NULL); | |
3416 | if (rc) { | |
1eca4365 | 3417 | ata_for_each_dev(dev, &ap->link, ALL) |
9b1e2658 TH |
3418 | ata_dev_disable(dev); |
3419 | } | |
3420 | ||
022bdb07 TH |
3421 | ata_eh_finish(ap); |
3422 | } | |
500530f6 | 3423 | |
a1efdaba TH |
3424 | /** |
3425 | * ata_std_error_handler - standard error handler | |
3426 | * @ap: host port to handle error for | |
3427 | * | |
3428 | * Standard error handler | |
3429 | * | |
3430 | * LOCKING: | |
3431 | * Kernel thread context (may sleep). | |
3432 | */ | |
3433 | void ata_std_error_handler(struct ata_port *ap) | |
3434 | { | |
3435 | struct ata_port_operations *ops = ap->ops; | |
3436 | ata_reset_fn_t hardreset = ops->hardreset; | |
3437 | ||
57c9efdf TH |
3438 | /* ignore built-in hardreset if SCR access is not available */ |
3439 | if (ata_is_builtin_hardreset(hardreset) && !sata_scr_valid(&ap->link)) | |
a1efdaba TH |
3440 | hardreset = NULL; |
3441 | ||
3442 | ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); | |
3443 | } | |
3444 | ||
6ffa01d8 | 3445 | #ifdef CONFIG_PM |
500530f6 TH |
3446 | /** |
3447 | * ata_eh_handle_port_suspend - perform port suspend operation | |
3448 | * @ap: port to suspend | |
3449 | * | |
3450 | * Suspend @ap. | |
3451 | * | |
3452 | * LOCKING: | |
3453 | * Kernel thread context (may sleep). | |
3454 | */ | |
3455 | static void ata_eh_handle_port_suspend(struct ata_port *ap) | |
3456 | { | |
3457 | unsigned long flags; | |
3458 | int rc = 0; | |
3459 | ||
3460 | /* are we suspending? */ | |
3461 | spin_lock_irqsave(ap->lock, flags); | |
3462 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3463 | ap->pm_mesg.event == PM_EVENT_ON) { | |
3464 | spin_unlock_irqrestore(ap->lock, flags); | |
3465 | return; | |
3466 | } | |
3467 | spin_unlock_irqrestore(ap->lock, flags); | |
3468 | ||
3469 | WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); | |
3470 | ||
64578a3d TH |
3471 | /* tell ACPI we're suspending */ |
3472 | rc = ata_acpi_on_suspend(ap); | |
3473 | if (rc) | |
3474 | goto out; | |
3475 | ||
500530f6 TH |
3476 | /* suspend */ |
3477 | ata_eh_freeze_port(ap); | |
3478 | ||
3479 | if (ap->ops->port_suspend) | |
3480 | rc = ap->ops->port_suspend(ap, ap->pm_mesg); | |
3481 | ||
bd3adca5 | 3482 | ata_acpi_set_state(ap, PMSG_SUSPEND); |
64578a3d | 3483 | out: |
500530f6 TH |
3484 | /* report result */ |
3485 | spin_lock_irqsave(ap->lock, flags); | |
3486 | ||
3487 | ap->pflags &= ~ATA_PFLAG_PM_PENDING; | |
3488 | if (rc == 0) | |
3489 | ap->pflags |= ATA_PFLAG_SUSPENDED; | |
64578a3d | 3490 | else if (ap->pflags & ATA_PFLAG_FROZEN) |
500530f6 TH |
3491 | ata_port_schedule_eh(ap); |
3492 | ||
3493 | if (ap->pm_result) { | |
3494 | *ap->pm_result = rc; | |
3495 | ap->pm_result = NULL; | |
3496 | } | |
3497 | ||
3498 | spin_unlock_irqrestore(ap->lock, flags); | |
3499 | ||
3500 | return; | |
3501 | } | |
3502 | ||
3503 | /** | |
3504 | * ata_eh_handle_port_resume - perform port resume operation | |
3505 | * @ap: port to resume | |
3506 | * | |
3507 | * Resume @ap. | |
3508 | * | |
500530f6 TH |
3509 | * LOCKING: |
3510 | * Kernel thread context (may sleep). | |
3511 | */ | |
3512 | static void ata_eh_handle_port_resume(struct ata_port *ap) | |
3513 | { | |
6f9c1ea2 TH |
3514 | struct ata_link *link; |
3515 | struct ata_device *dev; | |
500530f6 | 3516 | unsigned long flags; |
9666f400 | 3517 | int rc = 0; |
500530f6 TH |
3518 | |
3519 | /* are we resuming? */ | |
3520 | spin_lock_irqsave(ap->lock, flags); | |
3521 | if (!(ap->pflags & ATA_PFLAG_PM_PENDING) || | |
3522 | ap->pm_mesg.event != PM_EVENT_ON) { | |
3523 | spin_unlock_irqrestore(ap->lock, flags); | |
3524 | return; | |
3525 | } | |
3526 | spin_unlock_irqrestore(ap->lock, flags); | |
3527 | ||
9666f400 | 3528 | WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); |
500530f6 | 3529 | |
6f9c1ea2 TH |
3530 | /* |
3531 | * Error timestamps are in jiffies which doesn't run while | |
3532 | * suspended and PHY events during resume isn't too uncommon. | |
3533 | * When the two are combined, it can lead to unnecessary speed | |
3534 | * downs if the machine is suspended and resumed repeatedly. | |
3535 | * Clear error history. | |
3536 | */ | |
3537 | ata_for_each_link(link, ap, HOST_FIRST) | |
3538 | ata_for_each_dev(dev, link, ALL) | |
3539 | ata_ering_clear(&dev->ering); | |
3540 | ||
bd3adca5 SL |
3541 | ata_acpi_set_state(ap, PMSG_ON); |
3542 | ||
500530f6 TH |
3543 | if (ap->ops->port_resume) |
3544 | rc = ap->ops->port_resume(ap); | |
3545 | ||
6746544c TH |
3546 | /* tell ACPI that we're resuming */ |
3547 | ata_acpi_on_resume(ap); | |
3548 | ||
9666f400 | 3549 | /* report result */ |
500530f6 TH |
3550 | spin_lock_irqsave(ap->lock, flags); |
3551 | ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); | |
3552 | if (ap->pm_result) { | |
3553 | *ap->pm_result = rc; | |
3554 | ap->pm_result = NULL; | |
3555 | } | |
3556 | spin_unlock_irqrestore(ap->lock, flags); | |
3557 | } | |
6ffa01d8 | 3558 | #endif /* CONFIG_PM */ |