2 * libata-eh.c - libata error handling
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2006 Tejun Heo <htejun@gmail.com>
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.
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.
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,
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/kernel.h>
36 #include <linux/blkdev.h>
37 #include <linux/export.h>
38 #include <linux/pci.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_eh.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_dbg.h>
45 #include "../scsi/scsi_transport_api.h"
47 #include <linux/libata.h>
49 #include <trace/events/libata.h>
53 /* speed down verdicts */
54 ATA_EH_SPDN_NCQ_OFF
= (1 << 0),
55 ATA_EH_SPDN_SPEED_DOWN
= (1 << 1),
56 ATA_EH_SPDN_FALLBACK_TO_PIO
= (1 << 2),
57 ATA_EH_SPDN_KEEP_ERRORS
= (1 << 3),
60 ATA_EFLAG_IS_IO
= (1 << 0),
61 ATA_EFLAG_DUBIOUS_XFER
= (1 << 1),
62 ATA_EFLAG_OLD_ER
= (1 << 31),
64 /* error categories */
67 ATA_ECAT_TOUT_HSM
= 2,
69 ATA_ECAT_DUBIOUS_NONE
= 4,
70 ATA_ECAT_DUBIOUS_ATA_BUS
= 5,
71 ATA_ECAT_DUBIOUS_TOUT_HSM
= 6,
72 ATA_ECAT_DUBIOUS_UNK_DEV
= 7,
75 ATA_EH_CMD_DFL_TIMEOUT
= 5000,
77 /* always put at least this amount of time between resets */
78 ATA_EH_RESET_COOL_DOWN
= 5000,
80 /* Waiting in ->prereset can never be reliable. It's
81 * sometimes nice to wait there but it can't be depended upon;
82 * otherwise, we wouldn't be resetting. Just give it enough
83 * time for most drives to spin up.
85 ATA_EH_PRERESET_TIMEOUT
= 10000,
86 ATA_EH_FASTDRAIN_INTERVAL
= 3000,
90 /* probe speed down parameters, see ata_eh_schedule_probe() */
91 ATA_EH_PROBE_TRIAL_INTERVAL
= 60000, /* 1 min */
92 ATA_EH_PROBE_TRIALS
= 2,
95 /* The following table determines how we sequence resets. Each entry
96 * represents timeout for that try. The first try can be soft or
97 * hardreset. All others are hardreset if available. In most cases
98 * the first reset w/ 10sec timeout should succeed. Following entries
99 * are mostly for error handling, hotplug and those outlier devices that
100 * take an exceptionally long time to recover from reset.
102 static const unsigned long ata_eh_reset_timeouts
[] = {
103 10000, /* most drives spin up by 10sec */
104 10000, /* > 99% working drives spin up before 20sec */
105 35000, /* give > 30 secs of idleness for outlier devices */
106 5000, /* and sweet one last chance */
107 ULONG_MAX
, /* > 1 min has elapsed, give up */
110 static const unsigned long ata_eh_identify_timeouts
[] = {
111 5000, /* covers > 99% of successes and not too boring on failures */
112 10000, /* combined time till here is enough even for media access */
113 30000, /* for true idiots */
117 static const unsigned long ata_eh_flush_timeouts
[] = {
118 15000, /* be generous with flush */
120 30000, /* and even more generous */
124 static const unsigned long ata_eh_other_timeouts
[] = {
125 5000, /* same rationale as identify timeout */
127 /* but no merciful 30sec for other commands, it just isn't worth it */
131 struct ata_eh_cmd_timeout_ent
{
133 const unsigned long *timeouts
;
136 /* The following table determines timeouts to use for EH internal
137 * commands. Each table entry is a command class and matches the
138 * commands the entry applies to and the timeout table to use.
140 * On the retry after a command timed out, the next timeout value from
141 * the table is used. If the table doesn't contain further entries,
142 * the last value is used.
144 * ehc->cmd_timeout_idx keeps track of which timeout to use per
145 * command class, so if SET_FEATURES times out on the first try, the
146 * next try will use the second timeout value only for that class.
148 #define CMDS(cmds...) (const u8 []){ cmds, 0 }
149 static const struct ata_eh_cmd_timeout_ent
150 ata_eh_cmd_timeout_table
[ATA_EH_CMD_TIMEOUT_TABLE_SIZE
] = {
151 { .commands
= CMDS(ATA_CMD_ID_ATA
, ATA_CMD_ID_ATAPI
),
152 .timeouts
= ata_eh_identify_timeouts
, },
153 { .commands
= CMDS(ATA_CMD_READ_NATIVE_MAX
, ATA_CMD_READ_NATIVE_MAX_EXT
),
154 .timeouts
= ata_eh_other_timeouts
, },
155 { .commands
= CMDS(ATA_CMD_SET_MAX
, ATA_CMD_SET_MAX_EXT
),
156 .timeouts
= ata_eh_other_timeouts
, },
157 { .commands
= CMDS(ATA_CMD_SET_FEATURES
),
158 .timeouts
= ata_eh_other_timeouts
, },
159 { .commands
= CMDS(ATA_CMD_INIT_DEV_PARAMS
),
160 .timeouts
= ata_eh_other_timeouts
, },
161 { .commands
= CMDS(ATA_CMD_FLUSH
, ATA_CMD_FLUSH_EXT
),
162 .timeouts
= ata_eh_flush_timeouts
},
166 static void __ata_port_freeze(struct ata_port
*ap
);
168 static void ata_eh_handle_port_suspend(struct ata_port
*ap
);
169 static void ata_eh_handle_port_resume(struct ata_port
*ap
);
170 #else /* CONFIG_PM */
171 static void ata_eh_handle_port_suspend(struct ata_port
*ap
)
174 static void ata_eh_handle_port_resume(struct ata_port
*ap
)
176 #endif /* CONFIG_PM */
178 static void __ata_ehi_pushv_desc(struct ata_eh_info
*ehi
, const char *fmt
,
181 ehi
->desc_len
+= vscnprintf(ehi
->desc
+ ehi
->desc_len
,
182 ATA_EH_DESC_LEN
- ehi
->desc_len
,
187 * __ata_ehi_push_desc - push error description without adding separator
189 * @fmt: printf format string
191 * Format string according to @fmt and append it to @ehi->desc.
194 * spin_lock_irqsave(host lock)
196 void __ata_ehi_push_desc(struct ata_eh_info
*ehi
, const char *fmt
, ...)
201 __ata_ehi_pushv_desc(ehi
, fmt
, args
);
206 * ata_ehi_push_desc - push error description with separator
208 * @fmt: printf format string
210 * Format string according to @fmt and append it to @ehi->desc.
211 * If @ehi->desc is not empty, ", " is added in-between.
214 * spin_lock_irqsave(host lock)
216 void ata_ehi_push_desc(struct ata_eh_info
*ehi
, const char *fmt
, ...)
221 __ata_ehi_push_desc(ehi
, ", ");
224 __ata_ehi_pushv_desc(ehi
, fmt
, args
);
229 * ata_ehi_clear_desc - clean error description
235 * spin_lock_irqsave(host lock)
237 void ata_ehi_clear_desc(struct ata_eh_info
*ehi
)
244 * ata_port_desc - append port description
245 * @ap: target ATA port
246 * @fmt: printf format string
248 * Format string according to @fmt and append it to port
249 * description. If port description is not empty, " " is added
250 * in-between. This function is to be used while initializing
251 * ata_host. The description is printed on host registration.
256 void ata_port_desc(struct ata_port
*ap
, const char *fmt
, ...)
260 WARN_ON(!(ap
->pflags
& ATA_PFLAG_INITIALIZING
));
262 if (ap
->link
.eh_info
.desc_len
)
263 __ata_ehi_push_desc(&ap
->link
.eh_info
, " ");
266 __ata_ehi_pushv_desc(&ap
->link
.eh_info
, fmt
, args
);
273 * ata_port_pbar_desc - append PCI BAR description
274 * @ap: target ATA port
275 * @bar: target PCI BAR
276 * @offset: offset into PCI BAR
277 * @name: name of the area
279 * If @offset is negative, this function formats a string which
280 * contains the name, address, size and type of the BAR and
281 * appends it to the port description. If @offset is zero or
282 * positive, only name and offsetted address is appended.
287 void ata_port_pbar_desc(struct ata_port
*ap
, int bar
, ssize_t offset
,
290 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
292 unsigned long long start
, len
;
294 if (pci_resource_flags(pdev
, bar
) & IORESOURCE_MEM
)
296 else if (pci_resource_flags(pdev
, bar
) & IORESOURCE_IO
)
299 start
= (unsigned long long)pci_resource_start(pdev
, bar
);
300 len
= (unsigned long long)pci_resource_len(pdev
, bar
);
303 ata_port_desc(ap
, "%s %s%llu@0x%llx", name
, type
, len
, start
);
305 ata_port_desc(ap
, "%s 0x%llx", name
,
306 start
+ (unsigned long long)offset
);
309 #endif /* CONFIG_PCI */
311 static int ata_lookup_timeout_table(u8 cmd
)
315 for (i
= 0; i
< ATA_EH_CMD_TIMEOUT_TABLE_SIZE
; i
++) {
318 for (cur
= ata_eh_cmd_timeout_table
[i
].commands
; *cur
; cur
++)
327 * ata_internal_cmd_timeout - determine timeout for an internal command
328 * @dev: target device
329 * @cmd: internal command to be issued
331 * Determine timeout for internal command @cmd for @dev.
337 * Determined timeout.
339 unsigned long ata_internal_cmd_timeout(struct ata_device
*dev
, u8 cmd
)
341 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
342 int ent
= ata_lookup_timeout_table(cmd
);
346 return ATA_EH_CMD_DFL_TIMEOUT
;
348 idx
= ehc
->cmd_timeout_idx
[dev
->devno
][ent
];
349 return ata_eh_cmd_timeout_table
[ent
].timeouts
[idx
];
353 * ata_internal_cmd_timed_out - notification for internal command timeout
354 * @dev: target device
355 * @cmd: internal command which timed out
357 * Notify EH that internal command @cmd for @dev timed out. This
358 * function should be called only for commands whose timeouts are
359 * determined using ata_internal_cmd_timeout().
364 void ata_internal_cmd_timed_out(struct ata_device
*dev
, u8 cmd
)
366 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
367 int ent
= ata_lookup_timeout_table(cmd
);
373 idx
= ehc
->cmd_timeout_idx
[dev
->devno
][ent
];
374 if (ata_eh_cmd_timeout_table
[ent
].timeouts
[idx
+ 1] != ULONG_MAX
)
375 ehc
->cmd_timeout_idx
[dev
->devno
][ent
]++;
378 static void ata_ering_record(struct ata_ering
*ering
, unsigned int eflags
,
379 unsigned int err_mask
)
381 struct ata_ering_entry
*ent
;
386 ering
->cursor
%= ATA_ERING_SIZE
;
388 ent
= &ering
->ring
[ering
->cursor
];
389 ent
->eflags
= eflags
;
390 ent
->err_mask
= err_mask
;
391 ent
->timestamp
= get_jiffies_64();
394 static struct ata_ering_entry
*ata_ering_top(struct ata_ering
*ering
)
396 struct ata_ering_entry
*ent
= &ering
->ring
[ering
->cursor
];
403 int ata_ering_map(struct ata_ering
*ering
,
404 int (*map_fn
)(struct ata_ering_entry
*, void *),
408 struct ata_ering_entry
*ent
;
412 ent
= &ering
->ring
[idx
];
415 rc
= map_fn(ent
, arg
);
418 idx
= (idx
- 1 + ATA_ERING_SIZE
) % ATA_ERING_SIZE
;
419 } while (idx
!= ering
->cursor
);
424 static int ata_ering_clear_cb(struct ata_ering_entry
*ent
, void *void_arg
)
426 ent
->eflags
|= ATA_EFLAG_OLD_ER
;
430 static void ata_ering_clear(struct ata_ering
*ering
)
432 ata_ering_map(ering
, ata_ering_clear_cb
, NULL
);
435 static unsigned int ata_eh_dev_action(struct ata_device
*dev
)
437 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
439 return ehc
->i
.action
| ehc
->i
.dev_action
[dev
->devno
];
442 static void ata_eh_clear_action(struct ata_link
*link
, struct ata_device
*dev
,
443 struct ata_eh_info
*ehi
, unsigned int action
)
445 struct ata_device
*tdev
;
448 ehi
->action
&= ~action
;
449 ata_for_each_dev(tdev
, link
, ALL
)
450 ehi
->dev_action
[tdev
->devno
] &= ~action
;
452 /* doesn't make sense for port-wide EH actions */
453 WARN_ON(!(action
& ATA_EH_PERDEV_MASK
));
455 /* break ehi->action into ehi->dev_action */
456 if (ehi
->action
& action
) {
457 ata_for_each_dev(tdev
, link
, ALL
)
458 ehi
->dev_action
[tdev
->devno
] |=
459 ehi
->action
& action
;
460 ehi
->action
&= ~action
;
463 /* turn off the specified per-dev action */
464 ehi
->dev_action
[dev
->devno
] &= ~action
;
469 * ata_eh_acquire - acquire EH ownership
470 * @ap: ATA port to acquire EH ownership for
472 * Acquire EH ownership for @ap. This is the basic exclusion
473 * mechanism for ports sharing a host. Only one port hanging off
474 * the same host can claim the ownership of EH.
479 void ata_eh_acquire(struct ata_port
*ap
)
481 mutex_lock(&ap
->host
->eh_mutex
);
482 WARN_ON_ONCE(ap
->host
->eh_owner
);
483 ap
->host
->eh_owner
= current
;
487 * ata_eh_release - release EH ownership
488 * @ap: ATA port to release EH ownership for
490 * Release EH ownership for @ap if the caller. The caller must
491 * have acquired EH ownership using ata_eh_acquire() previously.
496 void ata_eh_release(struct ata_port
*ap
)
498 WARN_ON_ONCE(ap
->host
->eh_owner
!= current
);
499 ap
->host
->eh_owner
= NULL
;
500 mutex_unlock(&ap
->host
->eh_mutex
);
504 * ata_scsi_timed_out - SCSI layer time out callback
505 * @cmd: timed out SCSI command
507 * Handles SCSI layer timeout. We race with normal completion of
508 * the qc for @cmd. If the qc is already gone, we lose and let
509 * the scsi command finish (EH_HANDLED). Otherwise, the qc has
510 * timed out and EH should be invoked. Prevent ata_qc_complete()
511 * from finishing it by setting EH_SCHEDULED and return
514 * TODO: kill this function once old EH is gone.
517 * Called from timer context
520 * EH_HANDLED or EH_NOT_HANDLED
522 enum blk_eh_timer_return
ata_scsi_timed_out(struct scsi_cmnd
*cmd
)
524 struct Scsi_Host
*host
= cmd
->device
->host
;
525 struct ata_port
*ap
= ata_shost_to_port(host
);
527 struct ata_queued_cmd
*qc
;
528 enum blk_eh_timer_return ret
;
532 if (ap
->ops
->error_handler
) {
533 ret
= BLK_EH_NOT_HANDLED
;
537 ret
= BLK_EH_HANDLED
;
538 spin_lock_irqsave(ap
->lock
, flags
);
539 qc
= ata_qc_from_tag(ap
, ap
->link
.active_tag
);
541 WARN_ON(qc
->scsicmd
!= cmd
);
542 qc
->flags
|= ATA_QCFLAG_EH_SCHEDULED
;
543 qc
->err_mask
|= AC_ERR_TIMEOUT
;
544 ret
= BLK_EH_NOT_HANDLED
;
546 spin_unlock_irqrestore(ap
->lock
, flags
);
549 DPRINTK("EXIT, ret=%d\n", ret
);
553 static void ata_eh_unload(struct ata_port
*ap
)
555 struct ata_link
*link
;
556 struct ata_device
*dev
;
559 /* Restore SControl IPM and SPD for the next driver and
560 * disable attached devices.
562 ata_for_each_link(link
, ap
, PMP_FIRST
) {
563 sata_scr_write(link
, SCR_CONTROL
, link
->saved_scontrol
& 0xff0);
564 ata_for_each_dev(dev
, link
, ALL
)
565 ata_dev_disable(dev
);
568 /* freeze and set UNLOADED */
569 spin_lock_irqsave(ap
->lock
, flags
);
571 ata_port_freeze(ap
); /* won't be thawed */
572 ap
->pflags
&= ~ATA_PFLAG_EH_PENDING
; /* clear pending from freeze */
573 ap
->pflags
|= ATA_PFLAG_UNLOADED
;
575 spin_unlock_irqrestore(ap
->lock
, flags
);
579 * ata_scsi_error - SCSI layer error handler callback
580 * @host: SCSI host on which error occurred
582 * Handles SCSI-layer-thrown error events.
585 * Inherited from SCSI layer (none, can sleep)
590 void ata_scsi_error(struct Scsi_Host
*host
)
592 struct ata_port
*ap
= ata_shost_to_port(host
);
594 LIST_HEAD(eh_work_q
);
598 spin_lock_irqsave(host
->host_lock
, flags
);
599 list_splice_init(&host
->eh_cmd_q
, &eh_work_q
);
600 spin_unlock_irqrestore(host
->host_lock
, flags
);
602 ata_scsi_cmd_error_handler(host
, ap
, &eh_work_q
);
604 /* If we timed raced normal completion and there is nothing to
605 recover nr_timedout == 0 why exactly are we doing error recovery ? */
606 ata_scsi_port_error_handler(host
, ap
);
608 /* finish or retry handled scmd's and clean up */
609 WARN_ON(host
->host_failed
|| !list_empty(&eh_work_q
));
615 * ata_scsi_cmd_error_handler - error callback for a list of commands
616 * @host: scsi host containing the port
617 * @ap: ATA port within the host
618 * @eh_work_q: list of commands to process
620 * process the given list of commands and return those finished to the
621 * ap->eh_done_q. This function is the first part of the libata error
622 * handler which processes a given list of failed commands.
624 void ata_scsi_cmd_error_handler(struct Scsi_Host
*host
, struct ata_port
*ap
,
625 struct list_head
*eh_work_q
)
630 /* make sure sff pio task is not running */
631 ata_sff_flush_pio_task(ap
);
633 /* synchronize with host lock and sort out timeouts */
635 /* For new EH, all qcs are finished in one of three ways -
636 * normal completion, error completion, and SCSI timeout.
637 * Both completions can race against SCSI timeout. When normal
638 * completion wins, the qc never reaches EH. When error
639 * completion wins, the qc has ATA_QCFLAG_FAILED set.
641 * When SCSI timeout wins, things are a bit more complex.
642 * Normal or error completion can occur after the timeout but
643 * before this point. In such cases, both types of
644 * completions are honored. A scmd is determined to have
645 * timed out iff its associated qc is active and not failed.
647 if (ap
->ops
->error_handler
) {
648 struct scsi_cmnd
*scmd
, *tmp
;
651 spin_lock_irqsave(ap
->lock
, flags
);
653 /* This must occur under the ap->lock as we don't want
654 a polled recovery to race the real interrupt handler
656 The lost_interrupt handler checks for any completed but
657 non-notified command and completes much like an IRQ handler.
659 We then fall into the error recovery code which will treat
660 this as if normal completion won the race */
662 if (ap
->ops
->lost_interrupt
)
663 ap
->ops
->lost_interrupt(ap
);
665 list_for_each_entry_safe(scmd
, tmp
, eh_work_q
, eh_entry
) {
666 struct ata_queued_cmd
*qc
;
668 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++) {
669 qc
= __ata_qc_from_tag(ap
, i
);
670 if (qc
->flags
& ATA_QCFLAG_ACTIVE
&&
675 if (i
< ATA_MAX_QUEUE
) {
676 /* the scmd has an associated qc */
677 if (!(qc
->flags
& ATA_QCFLAG_FAILED
)) {
678 /* which hasn't failed yet, timeout */
679 qc
->err_mask
|= AC_ERR_TIMEOUT
;
680 qc
->flags
|= ATA_QCFLAG_FAILED
;
684 /* Normal completion occurred after
685 * SCSI timeout but before this point.
686 * Successfully complete it.
688 scmd
->retries
= scmd
->allowed
;
689 scsi_eh_finish_cmd(scmd
, &ap
->eh_done_q
);
693 /* If we have timed out qcs. They belong to EH from
694 * this point but the state of the controller is
695 * unknown. Freeze the port to make sure the IRQ
696 * handler doesn't diddle with those qcs. This must
697 * be done atomically w.r.t. setting QCFLAG_FAILED.
700 __ata_port_freeze(ap
);
702 spin_unlock_irqrestore(ap
->lock
, flags
);
704 /* initialize eh_tries */
705 ap
->eh_tries
= ATA_EH_MAX_TRIES
;
707 spin_unlock_wait(ap
->lock
);
710 EXPORT_SYMBOL(ata_scsi_cmd_error_handler
);
713 * ata_scsi_port_error_handler - recover the port after the commands
714 * @host: SCSI host containing the port
717 * Handle the recovery of the port @ap after all the commands
718 * have been recovered.
720 void ata_scsi_port_error_handler(struct Scsi_Host
*host
, struct ata_port
*ap
)
724 /* invoke error handler */
725 if (ap
->ops
->error_handler
) {
726 struct ata_link
*link
;
728 /* acquire EH ownership */
731 /* kill fast drain timer */
732 del_timer_sync(&ap
->fastdrain_timer
);
734 /* process port resume request */
735 ata_eh_handle_port_resume(ap
);
737 /* fetch & clear EH info */
738 spin_lock_irqsave(ap
->lock
, flags
);
740 ata_for_each_link(link
, ap
, HOST_FIRST
) {
741 struct ata_eh_context
*ehc
= &link
->eh_context
;
742 struct ata_device
*dev
;
744 memset(&link
->eh_context
, 0, sizeof(link
->eh_context
));
745 link
->eh_context
.i
= link
->eh_info
;
746 memset(&link
->eh_info
, 0, sizeof(link
->eh_info
));
748 ata_for_each_dev(dev
, link
, ENABLED
) {
749 int devno
= dev
->devno
;
751 ehc
->saved_xfer_mode
[devno
] = dev
->xfer_mode
;
752 if (ata_ncq_enabled(dev
))
753 ehc
->saved_ncq_enabled
|= 1 << devno
;
757 ap
->pflags
|= ATA_PFLAG_EH_IN_PROGRESS
;
758 ap
->pflags
&= ~ATA_PFLAG_EH_PENDING
;
759 ap
->excl_link
= NULL
; /* don't maintain exclusion over EH */
761 spin_unlock_irqrestore(ap
->lock
, flags
);
763 /* invoke EH, skip if unloading or suspended */
764 if (!(ap
->pflags
& (ATA_PFLAG_UNLOADING
| ATA_PFLAG_SUSPENDED
)))
765 ap
->ops
->error_handler(ap
);
767 /* if unloading, commence suicide */
768 if ((ap
->pflags
& ATA_PFLAG_UNLOADING
) &&
769 !(ap
->pflags
& ATA_PFLAG_UNLOADED
))
774 /* process port suspend request */
775 ata_eh_handle_port_suspend(ap
);
777 /* Exception might have happened after ->error_handler
778 * recovered the port but before this point. Repeat
781 spin_lock_irqsave(ap
->lock
, flags
);
783 if (ap
->pflags
& ATA_PFLAG_EH_PENDING
) {
784 if (--ap
->eh_tries
) {
785 spin_unlock_irqrestore(ap
->lock
, flags
);
789 "EH pending after %d tries, giving up\n",
791 ap
->pflags
&= ~ATA_PFLAG_EH_PENDING
;
794 /* this run is complete, make sure EH info is clear */
795 ata_for_each_link(link
, ap
, HOST_FIRST
)
796 memset(&link
->eh_info
, 0, sizeof(link
->eh_info
));
798 /* end eh (clear host_eh_scheduled) while holding
799 * ap->lock such that if exception occurs after this
800 * point but before EH completion, SCSI midlayer will
805 spin_unlock_irqrestore(ap
->lock
, flags
);
808 WARN_ON(ata_qc_from_tag(ap
, ap
->link
.active_tag
) == NULL
);
809 ap
->ops
->eng_timeout(ap
);
812 scsi_eh_flush_done_q(&ap
->eh_done_q
);
815 spin_lock_irqsave(ap
->lock
, flags
);
817 if (ap
->pflags
& ATA_PFLAG_LOADING
)
818 ap
->pflags
&= ~ATA_PFLAG_LOADING
;
819 else if (ap
->pflags
& ATA_PFLAG_SCSI_HOTPLUG
)
820 schedule_delayed_work(&ap
->hotplug_task
, 0);
822 if (ap
->pflags
& ATA_PFLAG_RECOVERED
)
823 ata_port_info(ap
, "EH complete\n");
825 ap
->pflags
&= ~(ATA_PFLAG_SCSI_HOTPLUG
| ATA_PFLAG_RECOVERED
);
827 /* tell wait_eh that we're done */
828 ap
->pflags
&= ~ATA_PFLAG_EH_IN_PROGRESS
;
829 wake_up_all(&ap
->eh_wait_q
);
831 spin_unlock_irqrestore(ap
->lock
, flags
);
833 EXPORT_SYMBOL_GPL(ata_scsi_port_error_handler
);
836 * ata_port_wait_eh - Wait for the currently pending EH to complete
837 * @ap: Port to wait EH for
839 * Wait until the currently pending EH is complete.
842 * Kernel thread context (may sleep).
844 void ata_port_wait_eh(struct ata_port
*ap
)
850 spin_lock_irqsave(ap
->lock
, flags
);
852 while (ap
->pflags
& (ATA_PFLAG_EH_PENDING
| ATA_PFLAG_EH_IN_PROGRESS
)) {
853 prepare_to_wait(&ap
->eh_wait_q
, &wait
, TASK_UNINTERRUPTIBLE
);
854 spin_unlock_irqrestore(ap
->lock
, flags
);
856 spin_lock_irqsave(ap
->lock
, flags
);
858 finish_wait(&ap
->eh_wait_q
, &wait
);
860 spin_unlock_irqrestore(ap
->lock
, flags
);
862 /* make sure SCSI EH is complete */
863 if (scsi_host_in_recovery(ap
->scsi_host
)) {
868 EXPORT_SYMBOL_GPL(ata_port_wait_eh
);
870 static int ata_eh_nr_in_flight(struct ata_port
*ap
)
875 /* count only non-internal commands */
876 for (tag
= 0; tag
< ATA_MAX_QUEUE
- 1; tag
++)
877 if (ata_qc_from_tag(ap
, tag
))
883 void ata_eh_fastdrain_timerfn(unsigned long arg
)
885 struct ata_port
*ap
= (void *)arg
;
889 spin_lock_irqsave(ap
->lock
, flags
);
891 cnt
= ata_eh_nr_in_flight(ap
);
897 if (cnt
== ap
->fastdrain_cnt
) {
900 /* No progress during the last interval, tag all
901 * in-flight qcs as timed out and freeze the port.
903 for (tag
= 0; tag
< ATA_MAX_QUEUE
- 1; tag
++) {
904 struct ata_queued_cmd
*qc
= ata_qc_from_tag(ap
, tag
);
906 qc
->err_mask
|= AC_ERR_TIMEOUT
;
911 /* some qcs have finished, give it another chance */
912 ap
->fastdrain_cnt
= cnt
;
913 ap
->fastdrain_timer
.expires
=
914 ata_deadline(jiffies
, ATA_EH_FASTDRAIN_INTERVAL
);
915 add_timer(&ap
->fastdrain_timer
);
919 spin_unlock_irqrestore(ap
->lock
, flags
);
923 * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain
924 * @ap: target ATA port
925 * @fastdrain: activate fast drain
927 * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain
928 * is non-zero and EH wasn't pending before. Fast drain ensures
929 * that EH kicks in in timely manner.
932 * spin_lock_irqsave(host lock)
934 static void ata_eh_set_pending(struct ata_port
*ap
, int fastdrain
)
938 /* already scheduled? */
939 if (ap
->pflags
& ATA_PFLAG_EH_PENDING
)
942 ap
->pflags
|= ATA_PFLAG_EH_PENDING
;
947 /* do we have in-flight qcs? */
948 cnt
= ata_eh_nr_in_flight(ap
);
952 /* activate fast drain */
953 ap
->fastdrain_cnt
= cnt
;
954 ap
->fastdrain_timer
.expires
=
955 ata_deadline(jiffies
, ATA_EH_FASTDRAIN_INTERVAL
);
956 add_timer(&ap
->fastdrain_timer
);
960 * ata_qc_schedule_eh - schedule qc for error handling
961 * @qc: command to schedule error handling for
963 * Schedule error handling for @qc. EH will kick in as soon as
964 * other commands are drained.
967 * spin_lock_irqsave(host lock)
969 void ata_qc_schedule_eh(struct ata_queued_cmd
*qc
)
971 struct ata_port
*ap
= qc
->ap
;
972 struct request_queue
*q
= qc
->scsicmd
->device
->request_queue
;
975 WARN_ON(!ap
->ops
->error_handler
);
977 qc
->flags
|= ATA_QCFLAG_FAILED
;
978 ata_eh_set_pending(ap
, 1);
980 /* The following will fail if timeout has already expired.
981 * ata_scsi_error() takes care of such scmds on EH entry.
982 * Note that ATA_QCFLAG_FAILED is unconditionally set after
983 * this function completes.
985 spin_lock_irqsave(q
->queue_lock
, flags
);
986 blk_abort_request(qc
->scsicmd
->request
);
987 spin_unlock_irqrestore(q
->queue_lock
, flags
);
991 * ata_std_sched_eh - non-libsas ata_ports issue eh with this common routine
992 * @ap: ATA port to schedule EH for
994 * LOCKING: inherited from ata_port_schedule_eh
995 * spin_lock_irqsave(host lock)
997 void ata_std_sched_eh(struct ata_port
*ap
)
999 WARN_ON(!ap
->ops
->error_handler
);
1001 if (ap
->pflags
& ATA_PFLAG_INITIALIZING
)
1004 ata_eh_set_pending(ap
, 1);
1005 scsi_schedule_eh(ap
->scsi_host
);
1007 DPRINTK("port EH scheduled\n");
1009 EXPORT_SYMBOL_GPL(ata_std_sched_eh
);
1012 * ata_std_end_eh - non-libsas ata_ports complete eh with this common routine
1013 * @ap: ATA port to end EH for
1015 * In the libata object model there is a 1:1 mapping of ata_port to
1016 * shost, so host fields can be directly manipulated under ap->lock, in
1017 * the libsas case we need to hold a lock at the ha->level to coordinate
1021 * spin_lock_irqsave(host lock)
1023 void ata_std_end_eh(struct ata_port
*ap
)
1025 struct Scsi_Host
*host
= ap
->scsi_host
;
1027 host
->host_eh_scheduled
= 0;
1029 EXPORT_SYMBOL(ata_std_end_eh
);
1033 * ata_port_schedule_eh - schedule error handling without a qc
1034 * @ap: ATA port to schedule EH for
1036 * Schedule error handling for @ap. EH will kick in as soon as
1037 * all commands are drained.
1040 * spin_lock_irqsave(host lock)
1042 void ata_port_schedule_eh(struct ata_port
*ap
)
1044 /* see: ata_std_sched_eh, unless you know better */
1045 ap
->ops
->sched_eh(ap
);
1048 static int ata_do_link_abort(struct ata_port
*ap
, struct ata_link
*link
)
1050 int tag
, nr_aborted
= 0;
1052 WARN_ON(!ap
->ops
->error_handler
);
1054 /* we're gonna abort all commands, no need for fast drain */
1055 ata_eh_set_pending(ap
, 0);
1057 for (tag
= 0; tag
< ATA_MAX_QUEUE
; tag
++) {
1058 struct ata_queued_cmd
*qc
= ata_qc_from_tag(ap
, tag
);
1060 if (qc
&& (!link
|| qc
->dev
->link
== link
)) {
1061 qc
->flags
|= ATA_QCFLAG_FAILED
;
1062 ata_qc_complete(qc
);
1068 ata_port_schedule_eh(ap
);
1074 * ata_link_abort - abort all qc's on the link
1075 * @link: ATA link to abort qc's for
1077 * Abort all active qc's active on @link and schedule EH.
1080 * spin_lock_irqsave(host lock)
1083 * Number of aborted qc's.
1085 int ata_link_abort(struct ata_link
*link
)
1087 return ata_do_link_abort(link
->ap
, link
);
1091 * ata_port_abort - abort all qc's on the port
1092 * @ap: ATA port to abort qc's for
1094 * Abort all active qc's of @ap and schedule EH.
1097 * spin_lock_irqsave(host_set lock)
1100 * Number of aborted qc's.
1102 int ata_port_abort(struct ata_port
*ap
)
1104 return ata_do_link_abort(ap
, NULL
);
1108 * __ata_port_freeze - freeze port
1109 * @ap: ATA port to freeze
1111 * This function is called when HSM violation or some other
1112 * condition disrupts normal operation of the port. Frozen port
1113 * is not allowed to perform any operation until the port is
1114 * thawed, which usually follows a successful reset.
1116 * ap->ops->freeze() callback can be used for freezing the port
1117 * hardware-wise (e.g. mask interrupt and stop DMA engine). If a
1118 * port cannot be frozen hardware-wise, the interrupt handler
1119 * must ack and clear interrupts unconditionally while the port
1123 * spin_lock_irqsave(host lock)
1125 static void __ata_port_freeze(struct ata_port
*ap
)
1127 WARN_ON(!ap
->ops
->error_handler
);
1129 if (ap
->ops
->freeze
)
1130 ap
->ops
->freeze(ap
);
1132 ap
->pflags
|= ATA_PFLAG_FROZEN
;
1134 DPRINTK("ata%u port frozen\n", ap
->print_id
);
1138 * ata_port_freeze - abort & freeze port
1139 * @ap: ATA port to freeze
1141 * Abort and freeze @ap. The freeze operation must be called
1142 * first, because some hardware requires special operations
1143 * before the taskfile registers are accessible.
1146 * spin_lock_irqsave(host lock)
1149 * Number of aborted commands.
1151 int ata_port_freeze(struct ata_port
*ap
)
1155 WARN_ON(!ap
->ops
->error_handler
);
1157 __ata_port_freeze(ap
);
1158 nr_aborted
= ata_port_abort(ap
);
1164 * sata_async_notification - SATA async notification handler
1165 * @ap: ATA port where async notification is received
1167 * Handler to be called when async notification via SDB FIS is
1168 * received. This function schedules EH if necessary.
1171 * spin_lock_irqsave(host lock)
1174 * 1 if EH is scheduled, 0 otherwise.
1176 int sata_async_notification(struct ata_port
*ap
)
1181 if (!(ap
->flags
& ATA_FLAG_AN
))
1184 rc
= sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
);
1186 sata_scr_write(&ap
->link
, SCR_NOTIFICATION
, sntf
);
1188 if (!sata_pmp_attached(ap
) || rc
) {
1189 /* PMP is not attached or SNTF is not available */
1190 if (!sata_pmp_attached(ap
)) {
1191 /* PMP is not attached. Check whether ATAPI
1192 * AN is configured. If so, notify media
1195 struct ata_device
*dev
= ap
->link
.device
;
1197 if ((dev
->class == ATA_DEV_ATAPI
) &&
1198 (dev
->flags
& ATA_DFLAG_AN
))
1199 ata_scsi_media_change_notify(dev
);
1202 /* PMP is attached but SNTF is not available.
1203 * ATAPI async media change notification is
1204 * not used. The PMP must be reporting PHY
1205 * status change, schedule EH.
1207 ata_port_schedule_eh(ap
);
1211 /* PMP is attached and SNTF is available */
1212 struct ata_link
*link
;
1214 /* check and notify ATAPI AN */
1215 ata_for_each_link(link
, ap
, EDGE
) {
1216 if (!(sntf
& (1 << link
->pmp
)))
1219 if ((link
->device
->class == ATA_DEV_ATAPI
) &&
1220 (link
->device
->flags
& ATA_DFLAG_AN
))
1221 ata_scsi_media_change_notify(link
->device
);
1224 /* If PMP is reporting that PHY status of some
1225 * downstream ports has changed, schedule EH.
1227 if (sntf
& (1 << SATA_PMP_CTRL_PORT
)) {
1228 ata_port_schedule_eh(ap
);
1237 * ata_eh_freeze_port - EH helper to freeze port
1238 * @ap: ATA port to freeze
1245 void ata_eh_freeze_port(struct ata_port
*ap
)
1247 unsigned long flags
;
1249 if (!ap
->ops
->error_handler
)
1252 spin_lock_irqsave(ap
->lock
, flags
);
1253 __ata_port_freeze(ap
);
1254 spin_unlock_irqrestore(ap
->lock
, flags
);
1258 * ata_port_thaw_port - EH helper to thaw port
1259 * @ap: ATA port to thaw
1261 * Thaw frozen port @ap.
1266 void ata_eh_thaw_port(struct ata_port
*ap
)
1268 unsigned long flags
;
1270 if (!ap
->ops
->error_handler
)
1273 spin_lock_irqsave(ap
->lock
, flags
);
1275 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
1280 spin_unlock_irqrestore(ap
->lock
, flags
);
1282 DPRINTK("ata%u port thawed\n", ap
->print_id
);
1285 static void ata_eh_scsidone(struct scsi_cmnd
*scmd
)
1290 static void __ata_eh_qc_complete(struct ata_queued_cmd
*qc
)
1292 struct ata_port
*ap
= qc
->ap
;
1293 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1294 unsigned long flags
;
1296 spin_lock_irqsave(ap
->lock
, flags
);
1297 qc
->scsidone
= ata_eh_scsidone
;
1298 __ata_qc_complete(qc
);
1299 WARN_ON(ata_tag_valid(qc
->tag
));
1300 spin_unlock_irqrestore(ap
->lock
, flags
);
1302 scsi_eh_finish_cmd(scmd
, &ap
->eh_done_q
);
1306 * ata_eh_qc_complete - Complete an active ATA command from EH
1307 * @qc: Command to complete
1309 * Indicate to the mid and upper layers that an ATA command has
1310 * completed. To be used from EH.
1312 void ata_eh_qc_complete(struct ata_queued_cmd
*qc
)
1314 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1315 scmd
->retries
= scmd
->allowed
;
1316 __ata_eh_qc_complete(qc
);
1320 * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH
1321 * @qc: Command to retry
1323 * Indicate to the mid and upper layers that an ATA command
1324 * should be retried. To be used from EH.
1326 * SCSI midlayer limits the number of retries to scmd->allowed.
1327 * scmd->allowed is incremented for commands which get retried
1328 * due to unrelated failures (qc->err_mask is zero).
1330 void ata_eh_qc_retry(struct ata_queued_cmd
*qc
)
1332 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1335 __ata_eh_qc_complete(qc
);
1339 * ata_dev_disable - disable ATA device
1340 * @dev: ATA device to disable
1347 void ata_dev_disable(struct ata_device
*dev
)
1349 if (!ata_dev_enabled(dev
))
1352 if (ata_msg_drv(dev
->link
->ap
))
1353 ata_dev_warn(dev
, "disabled\n");
1354 ata_acpi_on_disable(dev
);
1355 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
| ATA_DNXFER_QUIET
);
1358 /* From now till the next successful probe, ering is used to
1359 * track probe failures. Clear accumulated device error info.
1361 ata_ering_clear(&dev
->ering
);
1365 * ata_eh_detach_dev - detach ATA device
1366 * @dev: ATA device to detach
1373 void ata_eh_detach_dev(struct ata_device
*dev
)
1375 struct ata_link
*link
= dev
->link
;
1376 struct ata_port
*ap
= link
->ap
;
1377 struct ata_eh_context
*ehc
= &link
->eh_context
;
1378 unsigned long flags
;
1380 ata_dev_disable(dev
);
1382 spin_lock_irqsave(ap
->lock
, flags
);
1384 dev
->flags
&= ~ATA_DFLAG_DETACH
;
1386 if (ata_scsi_offline_dev(dev
)) {
1387 dev
->flags
|= ATA_DFLAG_DETACHED
;
1388 ap
->pflags
|= ATA_PFLAG_SCSI_HOTPLUG
;
1391 /* clear per-dev EH info */
1392 ata_eh_clear_action(link
, dev
, &link
->eh_info
, ATA_EH_PERDEV_MASK
);
1393 ata_eh_clear_action(link
, dev
, &link
->eh_context
.i
, ATA_EH_PERDEV_MASK
);
1394 ehc
->saved_xfer_mode
[dev
->devno
] = 0;
1395 ehc
->saved_ncq_enabled
&= ~(1 << dev
->devno
);
1397 spin_unlock_irqrestore(ap
->lock
, flags
);
1401 * ata_eh_about_to_do - about to perform eh_action
1402 * @link: target ATA link
1403 * @dev: target ATA dev for per-dev action (can be NULL)
1404 * @action: action about to be performed
1406 * Called just before performing EH actions to clear related bits
1407 * in @link->eh_info such that eh actions are not unnecessarily
1413 void ata_eh_about_to_do(struct ata_link
*link
, struct ata_device
*dev
,
1414 unsigned int action
)
1416 struct ata_port
*ap
= link
->ap
;
1417 struct ata_eh_info
*ehi
= &link
->eh_info
;
1418 struct ata_eh_context
*ehc
= &link
->eh_context
;
1419 unsigned long flags
;
1421 spin_lock_irqsave(ap
->lock
, flags
);
1423 ata_eh_clear_action(link
, dev
, ehi
, action
);
1425 /* About to take EH action, set RECOVERED. Ignore actions on
1426 * slave links as master will do them again.
1428 if (!(ehc
->i
.flags
& ATA_EHI_QUIET
) && link
!= ap
->slave_link
)
1429 ap
->pflags
|= ATA_PFLAG_RECOVERED
;
1431 spin_unlock_irqrestore(ap
->lock
, flags
);
1435 * ata_eh_done - EH action complete
1436 * @ap: target ATA port
1437 * @dev: target ATA dev for per-dev action (can be NULL)
1438 * @action: action just completed
1440 * Called right after performing EH actions to clear related bits
1441 * in @link->eh_context.
1446 void ata_eh_done(struct ata_link
*link
, struct ata_device
*dev
,
1447 unsigned int action
)
1449 struct ata_eh_context
*ehc
= &link
->eh_context
;
1451 ata_eh_clear_action(link
, dev
, &ehc
->i
, action
);
1455 * ata_err_string - convert err_mask to descriptive string
1456 * @err_mask: error mask to convert to string
1458 * Convert @err_mask to descriptive string. Errors are
1459 * prioritized according to severity and only the most severe
1460 * error is reported.
1466 * Descriptive string for @err_mask
1468 static const char *ata_err_string(unsigned int err_mask
)
1470 if (err_mask
& AC_ERR_HOST_BUS
)
1471 return "host bus error";
1472 if (err_mask
& AC_ERR_ATA_BUS
)
1473 return "ATA bus error";
1474 if (err_mask
& AC_ERR_TIMEOUT
)
1476 if (err_mask
& AC_ERR_HSM
)
1477 return "HSM violation";
1478 if (err_mask
& AC_ERR_SYSTEM
)
1479 return "internal error";
1480 if (err_mask
& AC_ERR_MEDIA
)
1481 return "media error";
1482 if (err_mask
& AC_ERR_INVALID
)
1483 return "invalid argument";
1484 if (err_mask
& AC_ERR_DEV
)
1485 return "device error";
1486 return "unknown error";
1490 * ata_read_log_page - read a specific log page
1491 * @dev: target device
1493 * @page: page to read
1494 * @buf: buffer to store read page
1495 * @sectors: number of sectors to read
1497 * Read log page using READ_LOG_EXT command.
1500 * Kernel thread context (may sleep).
1503 * 0 on success, AC_ERR_* mask otherwise.
1505 unsigned int ata_read_log_page(struct ata_device
*dev
, u8 log
,
1506 u8 page
, void *buf
, unsigned int sectors
)
1508 struct ata_taskfile tf
;
1509 unsigned int err_mask
;
1512 DPRINTK("read log page - log 0x%x, page 0x%x\n", log
, page
);
1515 ata_tf_init(dev
, &tf
);
1516 if (dev
->dma_mode
&& ata_id_has_read_log_dma_ext(dev
->id
) &&
1517 !(dev
->horkage
& ATA_HORKAGE_NO_NCQ_LOG
)) {
1518 tf
.command
= ATA_CMD_READ_LOG_DMA_EXT
;
1519 tf
.protocol
= ATA_PROT_DMA
;
1522 tf
.command
= ATA_CMD_READ_LOG_EXT
;
1523 tf
.protocol
= ATA_PROT_PIO
;
1529 tf
.hob_nsect
= sectors
>> 8;
1530 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_LBA48
| ATA_TFLAG_DEVICE
;
1532 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_FROM_DEVICE
,
1533 buf
, sectors
* ATA_SECT_SIZE
, 0);
1535 if (err_mask
&& dma
) {
1536 dev
->horkage
|= ATA_HORKAGE_NO_NCQ_LOG
;
1537 ata_dev_warn(dev
, "READ LOG DMA EXT failed, trying unqueued\n");
1541 DPRINTK("EXIT, err_mask=%x\n", err_mask
);
1546 * ata_eh_read_log_10h - Read log page 10h for NCQ error details
1547 * @dev: Device to read log page 10h from
1548 * @tag: Resulting tag of the failed command
1549 * @tf: Resulting taskfile registers of the failed command
1551 * Read log page 10h to obtain NCQ error details and clear error
1555 * Kernel thread context (may sleep).
1558 * 0 on success, -errno otherwise.
1560 static int ata_eh_read_log_10h(struct ata_device
*dev
,
1561 int *tag
, struct ata_taskfile
*tf
)
1563 u8
*buf
= dev
->link
->ap
->sector_buf
;
1564 unsigned int err_mask
;
1568 err_mask
= ata_read_log_page(dev
, ATA_LOG_SATA_NCQ
, 0, buf
, 1);
1573 for (i
= 0; i
< ATA_SECT_SIZE
; i
++)
1576 ata_dev_warn(dev
, "invalid checksum 0x%x on log page 10h\n",
1582 *tag
= buf
[0] & 0x1f;
1584 tf
->command
= buf
[2];
1585 tf
->feature
= buf
[3];
1589 tf
->device
= buf
[7];
1590 tf
->hob_lbal
= buf
[8];
1591 tf
->hob_lbam
= buf
[9];
1592 tf
->hob_lbah
= buf
[10];
1593 tf
->nsect
= buf
[12];
1594 tf
->hob_nsect
= buf
[13];
1595 if (ata_id_has_ncq_autosense(dev
->id
))
1596 tf
->auxiliary
= buf
[14] << 16 | buf
[15] << 8 | buf
[16];
1602 * atapi_eh_tur - perform ATAPI TEST_UNIT_READY
1603 * @dev: target ATAPI device
1604 * @r_sense_key: out parameter for sense_key
1606 * Perform ATAPI TEST_UNIT_READY.
1609 * EH context (may sleep).
1612 * 0 on success, AC_ERR_* mask on failure.
1614 unsigned int atapi_eh_tur(struct ata_device
*dev
, u8
*r_sense_key
)
1616 u8 cdb
[ATAPI_CDB_LEN
] = { TEST_UNIT_READY
, 0, 0, 0, 0, 0 };
1617 struct ata_taskfile tf
;
1618 unsigned int err_mask
;
1620 ata_tf_init(dev
, &tf
);
1622 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1623 tf
.command
= ATA_CMD_PACKET
;
1624 tf
.protocol
= ATAPI_PROT_NODATA
;
1626 err_mask
= ata_exec_internal(dev
, &tf
, cdb
, DMA_NONE
, NULL
, 0, 0);
1627 if (err_mask
== AC_ERR_DEV
)
1628 *r_sense_key
= tf
.feature
>> 4;
1633 * ata_eh_request_sense - perform REQUEST_SENSE_DATA_EXT
1634 * @dev: device to perform REQUEST_SENSE_SENSE_DATA_EXT to
1635 * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long)
1636 * @dfl_sense_key: default sense key to use
1638 * Perform REQUEST_SENSE_DATA_EXT after the device reported CHECK
1639 * SENSE. This function is EH helper.
1642 * Kernel thread context (may sleep).
1645 * encoded sense data on success, 0 on failure or if sense data
1648 static u32
ata_eh_request_sense(struct ata_queued_cmd
*qc
,
1649 struct scsi_cmnd
*cmd
)
1651 struct ata_device
*dev
= qc
->dev
;
1652 struct ata_taskfile tf
;
1653 unsigned int err_mask
;
1658 DPRINTK("ATA request sense\n");
1659 ata_dev_warn(dev
, "request sense\n");
1660 if (!ata_id_sense_reporting_enabled(dev
->id
)) {
1661 ata_dev_warn(qc
->dev
, "sense data reporting disabled\n");
1664 ata_tf_init(dev
, &tf
);
1666 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1667 tf
.flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
1668 tf
.command
= ATA_CMD_REQ_SENSE_DATA
;
1669 tf
.protocol
= ATA_PROT_NODATA
;
1671 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1674 * The device may set the SENSE DATA AVAILABLE bit to one in the
1675 * STATUS field and clear the ERROR bit to zero in the STATUS field
1676 * to indicate that the command returned completion without an error
1677 * and the sense data described in table 306 is available.
1679 * IOW the 'ATA_SENSE' bit might not be set even though valid
1680 * sense data is available.
1681 * So check for both.
1683 if ((tf
.command
& ATA_SENSE
) ||
1684 tf
.lbah
!= 0 || tf
.lbam
!= 0 || tf
.lbal
!= 0) {
1685 ata_scsi_set_sense(cmd
, tf
.lbah
, tf
.lbam
, tf
.lbal
);
1686 qc
->flags
|= ATA_QCFLAG_SENSE_VALID
;
1687 ata_dev_warn(dev
, "sense data %02x/%02x/%02x\n",
1688 tf
.lbah
, tf
.lbam
, tf
.lbal
);
1690 ata_dev_warn(dev
, "request sense failed stat %02x emask %x\n",
1691 tf
.command
, err_mask
);
1697 * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE
1698 * @dev: device to perform REQUEST_SENSE to
1699 * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long)
1700 * @dfl_sense_key: default sense key to use
1702 * Perform ATAPI REQUEST_SENSE after the device reported CHECK
1703 * SENSE. This function is EH helper.
1706 * Kernel thread context (may sleep).
1709 * 0 on success, AC_ERR_* mask on failure
1711 unsigned int atapi_eh_request_sense(struct ata_device
*dev
,
1712 u8
*sense_buf
, u8 dfl_sense_key
)
1714 u8 cdb
[ATAPI_CDB_LEN
] =
1715 { REQUEST_SENSE
, 0, 0, 0, SCSI_SENSE_BUFFERSIZE
, 0 };
1716 struct ata_port
*ap
= dev
->link
->ap
;
1717 struct ata_taskfile tf
;
1719 DPRINTK("ATAPI request sense\n");
1721 memset(sense_buf
, 0, SCSI_SENSE_BUFFERSIZE
);
1723 /* initialize sense_buf with the error register,
1724 * for the case where they are -not- overwritten
1726 sense_buf
[0] = 0x70;
1727 sense_buf
[2] = dfl_sense_key
;
1729 /* some devices time out if garbage left in tf */
1730 ata_tf_init(dev
, &tf
);
1732 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1733 tf
.command
= ATA_CMD_PACKET
;
1735 /* is it pointless to prefer PIO for "safety reasons"? */
1736 if (ap
->flags
& ATA_FLAG_PIO_DMA
) {
1737 tf
.protocol
= ATAPI_PROT_DMA
;
1738 tf
.feature
|= ATAPI_PKT_DMA
;
1740 tf
.protocol
= ATAPI_PROT_PIO
;
1741 tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
1745 return ata_exec_internal(dev
, &tf
, cdb
, DMA_FROM_DEVICE
,
1746 sense_buf
, SCSI_SENSE_BUFFERSIZE
, 0);
1750 * ata_eh_analyze_serror - analyze SError for a failed port
1751 * @link: ATA link to analyze SError for
1753 * Analyze SError if available and further determine cause of
1759 static void ata_eh_analyze_serror(struct ata_link
*link
)
1761 struct ata_eh_context
*ehc
= &link
->eh_context
;
1762 u32 serror
= ehc
->i
.serror
;
1763 unsigned int err_mask
= 0, action
= 0;
1766 if (serror
& (SERR_PERSISTENT
| SERR_DATA
)) {
1767 err_mask
|= AC_ERR_ATA_BUS
;
1768 action
|= ATA_EH_RESET
;
1770 if (serror
& SERR_PROTOCOL
) {
1771 err_mask
|= AC_ERR_HSM
;
1772 action
|= ATA_EH_RESET
;
1774 if (serror
& SERR_INTERNAL
) {
1775 err_mask
|= AC_ERR_SYSTEM
;
1776 action
|= ATA_EH_RESET
;
1779 /* Determine whether a hotplug event has occurred. Both
1780 * SError.N/X are considered hotplug events for enabled or
1781 * host links. For disabled PMP links, only N bit is
1782 * considered as X bit is left at 1 for link plugging.
1784 if (link
->lpm_policy
> ATA_LPM_MAX_POWER
)
1785 hotplug_mask
= 0; /* hotplug doesn't work w/ LPM */
1786 else if (!(link
->flags
& ATA_LFLAG_DISABLED
) || ata_is_host_link(link
))
1787 hotplug_mask
= SERR_PHYRDY_CHG
| SERR_DEV_XCHG
;
1789 hotplug_mask
= SERR_PHYRDY_CHG
;
1791 if (serror
& hotplug_mask
)
1792 ata_ehi_hotplugged(&ehc
->i
);
1794 ehc
->i
.err_mask
|= err_mask
;
1795 ehc
->i
.action
|= action
;
1799 * ata_eh_analyze_ncq_error - analyze NCQ error
1800 * @link: ATA link to analyze NCQ error for
1802 * Read log page 10h, determine the offending qc and acquire
1803 * error status TF. For NCQ device errors, all LLDDs have to do
1804 * is setting AC_ERR_DEV in ehi->err_mask. This function takes
1808 * Kernel thread context (may sleep).
1810 void ata_eh_analyze_ncq_error(struct ata_link
*link
)
1812 struct ata_port
*ap
= link
->ap
;
1813 struct ata_eh_context
*ehc
= &link
->eh_context
;
1814 struct ata_device
*dev
= link
->device
;
1815 struct ata_queued_cmd
*qc
;
1816 struct ata_taskfile tf
;
1819 /* if frozen, we can't do much */
1820 if (ap
->pflags
& ATA_PFLAG_FROZEN
)
1823 /* is it NCQ device error? */
1824 if (!link
->sactive
|| !(ehc
->i
.err_mask
& AC_ERR_DEV
))
1827 /* has LLDD analyzed already? */
1828 for (tag
= 0; tag
< ATA_MAX_QUEUE
; tag
++) {
1829 qc
= __ata_qc_from_tag(ap
, tag
);
1831 if (!(qc
->flags
& ATA_QCFLAG_FAILED
))
1838 /* okay, this error is ours */
1839 memset(&tf
, 0, sizeof(tf
));
1840 rc
= ata_eh_read_log_10h(dev
, &tag
, &tf
);
1842 ata_link_err(link
, "failed to read log page 10h (errno=%d)\n",
1847 if (!(link
->sactive
& (1 << tag
))) {
1848 ata_link_err(link
, "log page 10h reported inactive tag %d\n",
1853 /* we've got the perpetrator, condemn it */
1854 qc
= __ata_qc_from_tag(ap
, tag
);
1855 memcpy(&qc
->result_tf
, &tf
, sizeof(tf
));
1856 qc
->result_tf
.flags
= ATA_TFLAG_ISADDR
| ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
1857 qc
->err_mask
|= AC_ERR_DEV
| AC_ERR_NCQ
;
1858 if (qc
->result_tf
.auxiliary
) {
1859 char sense_key
, asc
, ascq
;
1861 sense_key
= (qc
->result_tf
.auxiliary
>> 16) & 0xff;
1862 asc
= (qc
->result_tf
.auxiliary
>> 8) & 0xff;
1863 ascq
= qc
->result_tf
.auxiliary
& 0xff;
1864 ata_dev_dbg(dev
, "NCQ Autosense %02x/%02x/%02x\n",
1865 sense_key
, asc
, ascq
);
1866 ata_scsi_set_sense(qc
->scsicmd
, sense_key
, asc
, ascq
);
1867 qc
->flags
|= ATA_QCFLAG_SENSE_VALID
;
1870 ehc
->i
.err_mask
&= ~AC_ERR_DEV
;
1874 * ata_eh_analyze_tf - analyze taskfile of a failed qc
1875 * @qc: qc to analyze
1876 * @tf: Taskfile registers to analyze
1878 * Analyze taskfile of @qc and further determine cause of
1879 * failure. This function also requests ATAPI sense data if
1883 * Kernel thread context (may sleep).
1886 * Determined recovery action
1888 static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd
*qc
,
1889 const struct ata_taskfile
*tf
)
1891 unsigned int tmp
, action
= 0;
1892 u8 stat
= tf
->command
, err
= tf
->feature
;
1894 if ((stat
& (ATA_BUSY
| ATA_DRQ
| ATA_DRDY
)) != ATA_DRDY
) {
1895 qc
->err_mask
|= AC_ERR_HSM
;
1896 return ATA_EH_RESET
;
1900 * Sense data reporting does not work if the
1901 * device fault bit is set.
1903 if ((stat
& ATA_SENSE
) && !(stat
& ATA_DF
) &&
1904 !(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
1905 if (!(qc
->ap
->pflags
& ATA_PFLAG_FROZEN
)) {
1906 tmp
= ata_eh_request_sense(qc
, qc
->scsicmd
);
1908 qc
->err_mask
|= tmp
;
1910 ata_dev_warn(qc
->dev
, "sense data available but port frozen\n");
1914 /* Set by NCQ autosense or request sense above */
1915 if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
)
1918 if (stat
& (ATA_ERR
| ATA_DF
))
1919 qc
->err_mask
|= AC_ERR_DEV
;
1923 switch (qc
->dev
->class) {
1927 qc
->err_mask
|= AC_ERR_ATA_BUS
;
1928 if (err
& (ATA_UNC
| ATA_AMNF
))
1929 qc
->err_mask
|= AC_ERR_MEDIA
;
1931 qc
->err_mask
|= AC_ERR_INVALID
;
1935 if (!(qc
->ap
->pflags
& ATA_PFLAG_FROZEN
)) {
1936 tmp
= atapi_eh_request_sense(qc
->dev
,
1937 qc
->scsicmd
->sense_buffer
,
1938 qc
->result_tf
.feature
>> 4);
1940 /* ATA_QCFLAG_SENSE_VALID is used to
1941 * tell atapi_qc_complete() that sense
1942 * data is already valid.
1944 * TODO: interpret sense data and set
1945 * appropriate err_mask.
1947 qc
->flags
|= ATA_QCFLAG_SENSE_VALID
;
1949 qc
->err_mask
|= tmp
;
1953 if (qc
->err_mask
& (AC_ERR_HSM
| AC_ERR_TIMEOUT
| AC_ERR_ATA_BUS
))
1954 action
|= ATA_EH_RESET
;
1959 static int ata_eh_categorize_error(unsigned int eflags
, unsigned int err_mask
,
1964 if (!(eflags
& ATA_EFLAG_DUBIOUS_XFER
))
1968 base
= ATA_ECAT_DUBIOUS_NONE
;
1970 if (err_mask
& AC_ERR_ATA_BUS
)
1971 return base
+ ATA_ECAT_ATA_BUS
;
1973 if (err_mask
& AC_ERR_TIMEOUT
)
1974 return base
+ ATA_ECAT_TOUT_HSM
;
1976 if (eflags
& ATA_EFLAG_IS_IO
) {
1977 if (err_mask
& AC_ERR_HSM
)
1978 return base
+ ATA_ECAT_TOUT_HSM
;
1980 (AC_ERR_DEV
|AC_ERR_MEDIA
|AC_ERR_INVALID
)) == AC_ERR_DEV
)
1981 return base
+ ATA_ECAT_UNK_DEV
;
1987 struct speed_down_verdict_arg
{
1990 int nr_errors
[ATA_ECAT_NR
];
1993 static int speed_down_verdict_cb(struct ata_ering_entry
*ent
, void *void_arg
)
1995 struct speed_down_verdict_arg
*arg
= void_arg
;
1998 if ((ent
->eflags
& ATA_EFLAG_OLD_ER
) || (ent
->timestamp
< arg
->since
))
2001 cat
= ata_eh_categorize_error(ent
->eflags
, ent
->err_mask
,
2003 arg
->nr_errors
[cat
]++;
2009 * ata_eh_speed_down_verdict - Determine speed down verdict
2010 * @dev: Device of interest
2012 * This function examines error ring of @dev and determines
2013 * whether NCQ needs to be turned off, transfer speed should be
2014 * stepped down, or falling back to PIO is necessary.
2016 * ECAT_ATA_BUS : ATA_BUS error for any command
2018 * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for
2021 * ECAT_UNK_DEV : Unknown DEV error for IO commands
2023 * ECAT_DUBIOUS_* : Identical to above three but occurred while
2024 * data transfer hasn't been verified.
2028 * NCQ_OFF : Turn off NCQ.
2030 * SPEED_DOWN : Speed down transfer speed but don't fall back
2033 * FALLBACK_TO_PIO : Fall back to PIO.
2035 * Even if multiple verdicts are returned, only one action is
2036 * taken per error. An action triggered by non-DUBIOUS errors
2037 * clears ering, while one triggered by DUBIOUS_* errors doesn't.
2038 * This is to expedite speed down decisions right after device is
2039 * initially configured.
2041 * The followings are speed down rules. #1 and #2 deal with
2044 * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors
2045 * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO.
2047 * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors
2048 * occurred during last 5 mins, NCQ_OFF.
2050 * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors
2051 * occurred during last 5 mins, FALLBACK_TO_PIO
2053 * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred
2054 * during last 10 mins, NCQ_OFF.
2056 * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6
2057 * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN.
2060 * Inherited from caller.
2063 * OR of ATA_EH_SPDN_* flags.
2065 static unsigned int ata_eh_speed_down_verdict(struct ata_device
*dev
)
2067 const u64 j5mins
= 5LLU * 60 * HZ
, j10mins
= 10LLU * 60 * HZ
;
2068 u64 j64
= get_jiffies_64();
2069 struct speed_down_verdict_arg arg
;
2070 unsigned int verdict
= 0;
2072 /* scan past 5 mins of error history */
2073 memset(&arg
, 0, sizeof(arg
));
2074 arg
.since
= j64
- min(j64
, j5mins
);
2075 ata_ering_map(&dev
->ering
, speed_down_verdict_cb
, &arg
);
2077 if (arg
.nr_errors
[ATA_ECAT_DUBIOUS_ATA_BUS
] +
2078 arg
.nr_errors
[ATA_ECAT_DUBIOUS_TOUT_HSM
] > 1)
2079 verdict
|= ATA_EH_SPDN_SPEED_DOWN
|
2080 ATA_EH_SPDN_FALLBACK_TO_PIO
| ATA_EH_SPDN_KEEP_ERRORS
;
2082 if (arg
.nr_errors
[ATA_ECAT_DUBIOUS_TOUT_HSM
] +
2083 arg
.nr_errors
[ATA_ECAT_DUBIOUS_UNK_DEV
] > 1)
2084 verdict
|= ATA_EH_SPDN_NCQ_OFF
| ATA_EH_SPDN_KEEP_ERRORS
;
2086 if (arg
.nr_errors
[ATA_ECAT_ATA_BUS
] +
2087 arg
.nr_errors
[ATA_ECAT_TOUT_HSM
] +
2088 arg
.nr_errors
[ATA_ECAT_UNK_DEV
] > 6)
2089 verdict
|= ATA_EH_SPDN_FALLBACK_TO_PIO
;
2091 /* scan past 10 mins of error history */
2092 memset(&arg
, 0, sizeof(arg
));
2093 arg
.since
= j64
- min(j64
, j10mins
);
2094 ata_ering_map(&dev
->ering
, speed_down_verdict_cb
, &arg
);
2096 if (arg
.nr_errors
[ATA_ECAT_TOUT_HSM
] +
2097 arg
.nr_errors
[ATA_ECAT_UNK_DEV
] > 3)
2098 verdict
|= ATA_EH_SPDN_NCQ_OFF
;
2100 if (arg
.nr_errors
[ATA_ECAT_ATA_BUS
] +
2101 arg
.nr_errors
[ATA_ECAT_TOUT_HSM
] > 3 ||
2102 arg
.nr_errors
[ATA_ECAT_UNK_DEV
] > 6)
2103 verdict
|= ATA_EH_SPDN_SPEED_DOWN
;
2109 * ata_eh_speed_down - record error and speed down if necessary
2110 * @dev: Failed device
2111 * @eflags: mask of ATA_EFLAG_* flags
2112 * @err_mask: err_mask of the error
2114 * Record error and examine error history to determine whether
2115 * adjusting transmission speed is necessary. It also sets
2116 * transmission limits appropriately if such adjustment is
2120 * Kernel thread context (may sleep).
2123 * Determined recovery action.
2125 static unsigned int ata_eh_speed_down(struct ata_device
*dev
,
2126 unsigned int eflags
, unsigned int err_mask
)
2128 struct ata_link
*link
= ata_dev_phys_link(dev
);
2130 unsigned int verdict
;
2131 unsigned int action
= 0;
2133 /* don't bother if Cat-0 error */
2134 if (ata_eh_categorize_error(eflags
, err_mask
, &xfer_ok
) == 0)
2137 /* record error and determine whether speed down is necessary */
2138 ata_ering_record(&dev
->ering
, eflags
, err_mask
);
2139 verdict
= ata_eh_speed_down_verdict(dev
);
2142 if ((verdict
& ATA_EH_SPDN_NCQ_OFF
) &&
2143 (dev
->flags
& (ATA_DFLAG_PIO
| ATA_DFLAG_NCQ
|
2144 ATA_DFLAG_NCQ_OFF
)) == ATA_DFLAG_NCQ
) {
2145 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
2146 ata_dev_warn(dev
, "NCQ disabled due to excessive errors\n");
2151 if (verdict
& ATA_EH_SPDN_SPEED_DOWN
) {
2152 /* speed down SATA link speed if possible */
2153 if (sata_down_spd_limit(link
, 0) == 0) {
2154 action
|= ATA_EH_RESET
;
2158 /* lower transfer mode */
2159 if (dev
->spdn_cnt
< 2) {
2160 static const int dma_dnxfer_sel
[] =
2161 { ATA_DNXFER_DMA
, ATA_DNXFER_40C
};
2162 static const int pio_dnxfer_sel
[] =
2163 { ATA_DNXFER_PIO
, ATA_DNXFER_FORCE_PIO0
};
2166 if (dev
->xfer_shift
!= ATA_SHIFT_PIO
)
2167 sel
= dma_dnxfer_sel
[dev
->spdn_cnt
];
2169 sel
= pio_dnxfer_sel
[dev
->spdn_cnt
];
2173 if (ata_down_xfermask_limit(dev
, sel
) == 0) {
2174 action
|= ATA_EH_RESET
;
2180 /* Fall back to PIO? Slowing down to PIO is meaningless for
2181 * SATA ATA devices. Consider it only for PATA and SATAPI.
2183 if ((verdict
& ATA_EH_SPDN_FALLBACK_TO_PIO
) && (dev
->spdn_cnt
>= 2) &&
2184 (link
->ap
->cbl
!= ATA_CBL_SATA
|| dev
->class == ATA_DEV_ATAPI
) &&
2185 (dev
->xfer_shift
!= ATA_SHIFT_PIO
)) {
2186 if (ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO
) == 0) {
2188 action
|= ATA_EH_RESET
;
2195 /* device has been slowed down, blow error history */
2196 if (!(verdict
& ATA_EH_SPDN_KEEP_ERRORS
))
2197 ata_ering_clear(&dev
->ering
);
2202 * ata_eh_worth_retry - analyze error and decide whether to retry
2203 * @qc: qc to possibly retry
2205 * Look at the cause of the error and decide if a retry
2206 * might be useful or not. We don't want to retry media errors
2207 * because the drive itself has probably already taken 10-30 seconds
2208 * doing its own internal retries before reporting the failure.
2210 static inline int ata_eh_worth_retry(struct ata_queued_cmd
*qc
)
2212 if (qc
->err_mask
& AC_ERR_MEDIA
)
2213 return 0; /* don't retry media errors */
2214 if (qc
->flags
& ATA_QCFLAG_IO
)
2215 return 1; /* otherwise retry anything from fs stack */
2216 if (qc
->err_mask
& AC_ERR_INVALID
)
2217 return 0; /* don't retry these */
2218 return qc
->err_mask
!= AC_ERR_DEV
; /* retry if not dev error */
2222 * ata_eh_link_autopsy - analyze error and determine recovery action
2223 * @link: host link to perform autopsy on
2225 * Analyze why @link failed and determine which recovery actions
2226 * are needed. This function also sets more detailed AC_ERR_*
2227 * values and fills sense data for ATAPI CHECK SENSE.
2230 * Kernel thread context (may sleep).
2232 static void ata_eh_link_autopsy(struct ata_link
*link
)
2234 struct ata_port
*ap
= link
->ap
;
2235 struct ata_eh_context
*ehc
= &link
->eh_context
;
2236 struct ata_device
*dev
;
2237 unsigned int all_err_mask
= 0, eflags
= 0;
2244 if (ehc
->i
.flags
& ATA_EHI_NO_AUTOPSY
)
2247 /* obtain and analyze SError */
2248 rc
= sata_scr_read(link
, SCR_ERROR
, &serror
);
2250 ehc
->i
.serror
|= serror
;
2251 ata_eh_analyze_serror(link
);
2252 } else if (rc
!= -EOPNOTSUPP
) {
2253 /* SError read failed, force reset and probing */
2254 ehc
->i
.probe_mask
|= ATA_ALL_DEVICES
;
2255 ehc
->i
.action
|= ATA_EH_RESET
;
2256 ehc
->i
.err_mask
|= AC_ERR_OTHER
;
2259 /* analyze NCQ failure */
2260 ata_eh_analyze_ncq_error(link
);
2262 /* any real error trumps AC_ERR_OTHER */
2263 if (ehc
->i
.err_mask
& ~AC_ERR_OTHER
)
2264 ehc
->i
.err_mask
&= ~AC_ERR_OTHER
;
2266 all_err_mask
|= ehc
->i
.err_mask
;
2268 for (tag
= 0; tag
< ATA_MAX_QUEUE
; tag
++) {
2269 struct ata_queued_cmd
*qc
= __ata_qc_from_tag(ap
, tag
);
2271 if (!(qc
->flags
& ATA_QCFLAG_FAILED
) ||
2272 ata_dev_phys_link(qc
->dev
) != link
)
2275 /* inherit upper level err_mask */
2276 qc
->err_mask
|= ehc
->i
.err_mask
;
2279 ehc
->i
.action
|= ata_eh_analyze_tf(qc
, &qc
->result_tf
);
2281 /* DEV errors are probably spurious in case of ATA_BUS error */
2282 if (qc
->err_mask
& AC_ERR_ATA_BUS
)
2283 qc
->err_mask
&= ~(AC_ERR_DEV
| AC_ERR_MEDIA
|
2286 /* any real error trumps unknown error */
2287 if (qc
->err_mask
& ~AC_ERR_OTHER
)
2288 qc
->err_mask
&= ~AC_ERR_OTHER
;
2290 /* SENSE_VALID trumps dev/unknown error and revalidation */
2291 if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
)
2292 qc
->err_mask
&= ~(AC_ERR_DEV
| AC_ERR_OTHER
);
2294 /* determine whether the command is worth retrying */
2295 if (ata_eh_worth_retry(qc
))
2296 qc
->flags
|= ATA_QCFLAG_RETRY
;
2298 /* accumulate error info */
2299 ehc
->i
.dev
= qc
->dev
;
2300 all_err_mask
|= qc
->err_mask
;
2301 if (qc
->flags
& ATA_QCFLAG_IO
)
2302 eflags
|= ATA_EFLAG_IS_IO
;
2303 trace_ata_eh_link_autopsy_qc(qc
);
2306 /* enforce default EH actions */
2307 if (ap
->pflags
& ATA_PFLAG_FROZEN
||
2308 all_err_mask
& (AC_ERR_HSM
| AC_ERR_TIMEOUT
))
2309 ehc
->i
.action
|= ATA_EH_RESET
;
2310 else if (((eflags
& ATA_EFLAG_IS_IO
) && all_err_mask
) ||
2311 (!(eflags
& ATA_EFLAG_IS_IO
) && (all_err_mask
& ~AC_ERR_DEV
)))
2312 ehc
->i
.action
|= ATA_EH_REVALIDATE
;
2314 /* If we have offending qcs and the associated failed device,
2315 * perform per-dev EH action only on the offending device.
2318 ehc
->i
.dev_action
[ehc
->i
.dev
->devno
] |=
2319 ehc
->i
.action
& ATA_EH_PERDEV_MASK
;
2320 ehc
->i
.action
&= ~ATA_EH_PERDEV_MASK
;
2323 /* propagate timeout to host link */
2324 if ((all_err_mask
& AC_ERR_TIMEOUT
) && !ata_is_host_link(link
))
2325 ap
->link
.eh_context
.i
.err_mask
|= AC_ERR_TIMEOUT
;
2327 /* record error and consider speeding down */
2329 if (!dev
&& ((ata_link_max_devices(link
) == 1 &&
2330 ata_dev_enabled(link
->device
))))
2334 if (dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
)
2335 eflags
|= ATA_EFLAG_DUBIOUS_XFER
;
2336 ehc
->i
.action
|= ata_eh_speed_down(dev
, eflags
, all_err_mask
);
2338 trace_ata_eh_link_autopsy(dev
, ehc
->i
.action
, all_err_mask
);
2343 * ata_eh_autopsy - analyze error and determine recovery action
2344 * @ap: host port to perform autopsy on
2346 * Analyze all links of @ap and determine why they failed and
2347 * which recovery actions are needed.
2350 * Kernel thread context (may sleep).
2352 void ata_eh_autopsy(struct ata_port
*ap
)
2354 struct ata_link
*link
;
2356 ata_for_each_link(link
, ap
, EDGE
)
2357 ata_eh_link_autopsy(link
);
2359 /* Handle the frigging slave link. Autopsy is done similarly
2360 * but actions and flags are transferred over to the master
2361 * link and handled from there.
2363 if (ap
->slave_link
) {
2364 struct ata_eh_context
*mehc
= &ap
->link
.eh_context
;
2365 struct ata_eh_context
*sehc
= &ap
->slave_link
->eh_context
;
2367 /* transfer control flags from master to slave */
2368 sehc
->i
.flags
|= mehc
->i
.flags
& ATA_EHI_TO_SLAVE_MASK
;
2370 /* perform autopsy on the slave link */
2371 ata_eh_link_autopsy(ap
->slave_link
);
2373 /* transfer actions from slave to master and clear slave */
2374 ata_eh_about_to_do(ap
->slave_link
, NULL
, ATA_EH_ALL_ACTIONS
);
2375 mehc
->i
.action
|= sehc
->i
.action
;
2376 mehc
->i
.dev_action
[1] |= sehc
->i
.dev_action
[1];
2377 mehc
->i
.flags
|= sehc
->i
.flags
;
2378 ata_eh_done(ap
->slave_link
, NULL
, ATA_EH_ALL_ACTIONS
);
2381 /* Autopsy of fanout ports can affect host link autopsy.
2382 * Perform host link autopsy last.
2384 if (sata_pmp_attached(ap
))
2385 ata_eh_link_autopsy(&ap
->link
);
2389 * ata_get_cmd_descript - get description for ATA command
2390 * @command: ATA command code to get description for
2392 * Return a textual description of the given command, or NULL if the
2393 * command is not known.
2398 const char *ata_get_cmd_descript(u8 command
)
2400 #ifdef CONFIG_ATA_VERBOSE_ERROR
2406 { ATA_CMD_DEV_RESET
, "DEVICE RESET" },
2407 { ATA_CMD_CHK_POWER
, "CHECK POWER MODE" },
2408 { ATA_CMD_STANDBY
, "STANDBY" },
2409 { ATA_CMD_IDLE
, "IDLE" },
2410 { ATA_CMD_EDD
, "EXECUTE DEVICE DIAGNOSTIC" },
2411 { ATA_CMD_DOWNLOAD_MICRO
, "DOWNLOAD MICROCODE" },
2412 { ATA_CMD_DOWNLOAD_MICRO_DMA
, "DOWNLOAD MICROCODE DMA" },
2413 { ATA_CMD_NOP
, "NOP" },
2414 { ATA_CMD_FLUSH
, "FLUSH CACHE" },
2415 { ATA_CMD_FLUSH_EXT
, "FLUSH CACHE EXT" },
2416 { ATA_CMD_ID_ATA
, "IDENTIFY DEVICE" },
2417 { ATA_CMD_ID_ATAPI
, "IDENTIFY PACKET DEVICE" },
2418 { ATA_CMD_SERVICE
, "SERVICE" },
2419 { ATA_CMD_READ
, "READ DMA" },
2420 { ATA_CMD_READ_EXT
, "READ DMA EXT" },
2421 { ATA_CMD_READ_QUEUED
, "READ DMA QUEUED" },
2422 { ATA_CMD_READ_STREAM_EXT
, "READ STREAM EXT" },
2423 { ATA_CMD_READ_STREAM_DMA_EXT
, "READ STREAM DMA EXT" },
2424 { ATA_CMD_WRITE
, "WRITE DMA" },
2425 { ATA_CMD_WRITE_EXT
, "WRITE DMA EXT" },
2426 { ATA_CMD_WRITE_QUEUED
, "WRITE DMA QUEUED EXT" },
2427 { ATA_CMD_WRITE_STREAM_EXT
, "WRITE STREAM EXT" },
2428 { ATA_CMD_WRITE_STREAM_DMA_EXT
, "WRITE STREAM DMA EXT" },
2429 { ATA_CMD_WRITE_FUA_EXT
, "WRITE DMA FUA EXT" },
2430 { ATA_CMD_WRITE_QUEUED_FUA_EXT
, "WRITE DMA QUEUED FUA EXT" },
2431 { ATA_CMD_FPDMA_READ
, "READ FPDMA QUEUED" },
2432 { ATA_CMD_FPDMA_WRITE
, "WRITE FPDMA QUEUED" },
2433 { ATA_CMD_FPDMA_SEND
, "SEND FPDMA QUEUED" },
2434 { ATA_CMD_FPDMA_RECV
, "RECEIVE FPDMA QUEUED" },
2435 { ATA_CMD_PIO_READ
, "READ SECTOR(S)" },
2436 { ATA_CMD_PIO_READ_EXT
, "READ SECTOR(S) EXT" },
2437 { ATA_CMD_PIO_WRITE
, "WRITE SECTOR(S)" },
2438 { ATA_CMD_PIO_WRITE_EXT
, "WRITE SECTOR(S) EXT" },
2439 { ATA_CMD_READ_MULTI
, "READ MULTIPLE" },
2440 { ATA_CMD_READ_MULTI_EXT
, "READ MULTIPLE EXT" },
2441 { ATA_CMD_WRITE_MULTI
, "WRITE MULTIPLE" },
2442 { ATA_CMD_WRITE_MULTI_EXT
, "WRITE MULTIPLE EXT" },
2443 { ATA_CMD_WRITE_MULTI_FUA_EXT
, "WRITE MULTIPLE FUA EXT" },
2444 { ATA_CMD_SET_FEATURES
, "SET FEATURES" },
2445 { ATA_CMD_SET_MULTI
, "SET MULTIPLE MODE" },
2446 { ATA_CMD_VERIFY
, "READ VERIFY SECTOR(S)" },
2447 { ATA_CMD_VERIFY_EXT
, "READ VERIFY SECTOR(S) EXT" },
2448 { ATA_CMD_WRITE_UNCORR_EXT
, "WRITE UNCORRECTABLE EXT" },
2449 { ATA_CMD_STANDBYNOW1
, "STANDBY IMMEDIATE" },
2450 { ATA_CMD_IDLEIMMEDIATE
, "IDLE IMMEDIATE" },
2451 { ATA_CMD_SLEEP
, "SLEEP" },
2452 { ATA_CMD_INIT_DEV_PARAMS
, "INITIALIZE DEVICE PARAMETERS" },
2453 { ATA_CMD_READ_NATIVE_MAX
, "READ NATIVE MAX ADDRESS" },
2454 { ATA_CMD_READ_NATIVE_MAX_EXT
, "READ NATIVE MAX ADDRESS EXT" },
2455 { ATA_CMD_SET_MAX
, "SET MAX ADDRESS" },
2456 { ATA_CMD_SET_MAX_EXT
, "SET MAX ADDRESS EXT" },
2457 { ATA_CMD_READ_LOG_EXT
, "READ LOG EXT" },
2458 { ATA_CMD_WRITE_LOG_EXT
, "WRITE LOG EXT" },
2459 { ATA_CMD_READ_LOG_DMA_EXT
, "READ LOG DMA EXT" },
2460 { ATA_CMD_WRITE_LOG_DMA_EXT
, "WRITE LOG DMA EXT" },
2461 { ATA_CMD_TRUSTED_NONDATA
, "TRUSTED NON-DATA" },
2462 { ATA_CMD_TRUSTED_RCV
, "TRUSTED RECEIVE" },
2463 { ATA_CMD_TRUSTED_RCV_DMA
, "TRUSTED RECEIVE DMA" },
2464 { ATA_CMD_TRUSTED_SND
, "TRUSTED SEND" },
2465 { ATA_CMD_TRUSTED_SND_DMA
, "TRUSTED SEND DMA" },
2466 { ATA_CMD_PMP_READ
, "READ BUFFER" },
2467 { ATA_CMD_PMP_READ_DMA
, "READ BUFFER DMA" },
2468 { ATA_CMD_PMP_WRITE
, "WRITE BUFFER" },
2469 { ATA_CMD_PMP_WRITE_DMA
, "WRITE BUFFER DMA" },
2470 { ATA_CMD_CONF_OVERLAY
, "DEVICE CONFIGURATION OVERLAY" },
2471 { ATA_CMD_SEC_SET_PASS
, "SECURITY SET PASSWORD" },
2472 { ATA_CMD_SEC_UNLOCK
, "SECURITY UNLOCK" },
2473 { ATA_CMD_SEC_ERASE_PREP
, "SECURITY ERASE PREPARE" },
2474 { ATA_CMD_SEC_ERASE_UNIT
, "SECURITY ERASE UNIT" },
2475 { ATA_CMD_SEC_FREEZE_LOCK
, "SECURITY FREEZE LOCK" },
2476 { ATA_CMD_SEC_DISABLE_PASS
, "SECURITY DISABLE PASSWORD" },
2477 { ATA_CMD_CONFIG_STREAM
, "CONFIGURE STREAM" },
2478 { ATA_CMD_SMART
, "SMART" },
2479 { ATA_CMD_MEDIA_LOCK
, "DOOR LOCK" },
2480 { ATA_CMD_MEDIA_UNLOCK
, "DOOR UNLOCK" },
2481 { ATA_CMD_DSM
, "DATA SET MANAGEMENT" },
2482 { ATA_CMD_CHK_MED_CRD_TYP
, "CHECK MEDIA CARD TYPE" },
2483 { ATA_CMD_CFA_REQ_EXT_ERR
, "CFA REQUEST EXTENDED ERROR" },
2484 { ATA_CMD_CFA_WRITE_NE
, "CFA WRITE SECTORS WITHOUT ERASE" },
2485 { ATA_CMD_CFA_TRANS_SECT
, "CFA TRANSLATE SECTOR" },
2486 { ATA_CMD_CFA_ERASE
, "CFA ERASE SECTORS" },
2487 { ATA_CMD_CFA_WRITE_MULT_NE
, "CFA WRITE MULTIPLE WITHOUT ERASE" },
2488 { ATA_CMD_REQ_SENSE_DATA
, "REQUEST SENSE DATA EXT" },
2489 { ATA_CMD_SANITIZE_DEVICE
, "SANITIZE DEVICE" },
2490 { ATA_CMD_READ_LONG
, "READ LONG (with retries)" },
2491 { ATA_CMD_READ_LONG_ONCE
, "READ LONG (without retries)" },
2492 { ATA_CMD_WRITE_LONG
, "WRITE LONG (with retries)" },
2493 { ATA_CMD_WRITE_LONG_ONCE
, "WRITE LONG (without retries)" },
2494 { ATA_CMD_RESTORE
, "RECALIBRATE" },
2495 { 0, NULL
} /* terminate list */
2499 for (i
= 0; cmd_descr
[i
].text
; i
++)
2500 if (cmd_descr
[i
].command
== command
)
2501 return cmd_descr
[i
].text
;
2506 EXPORT_SYMBOL_GPL(ata_get_cmd_descript
);
2509 * ata_eh_link_report - report error handling to user
2510 * @link: ATA link EH is going on
2512 * Report EH to user.
2517 static void ata_eh_link_report(struct ata_link
*link
)
2519 struct ata_port
*ap
= link
->ap
;
2520 struct ata_eh_context
*ehc
= &link
->eh_context
;
2521 const char *frozen
, *desc
;
2522 char tries_buf
[6] = "";
2523 int tag
, nr_failed
= 0;
2525 if (ehc
->i
.flags
& ATA_EHI_QUIET
)
2529 if (ehc
->i
.desc
[0] != '\0')
2532 for (tag
= 0; tag
< ATA_MAX_QUEUE
; tag
++) {
2533 struct ata_queued_cmd
*qc
= __ata_qc_from_tag(ap
, tag
);
2535 if (!(qc
->flags
& ATA_QCFLAG_FAILED
) ||
2536 ata_dev_phys_link(qc
->dev
) != link
||
2537 ((qc
->flags
& ATA_QCFLAG_QUIET
) &&
2538 qc
->err_mask
== AC_ERR_DEV
))
2540 if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
&& !qc
->err_mask
)
2546 if (!nr_failed
&& !ehc
->i
.err_mask
)
2550 if (ap
->pflags
& ATA_PFLAG_FROZEN
)
2553 if (ap
->eh_tries
< ATA_EH_MAX_TRIES
)
2554 snprintf(tries_buf
, sizeof(tries_buf
), " t%d",
2558 ata_dev_err(ehc
->i
.dev
, "exception Emask 0x%x "
2559 "SAct 0x%x SErr 0x%x action 0x%x%s%s\n",
2560 ehc
->i
.err_mask
, link
->sactive
, ehc
->i
.serror
,
2561 ehc
->i
.action
, frozen
, tries_buf
);
2563 ata_dev_err(ehc
->i
.dev
, "%s\n", desc
);
2565 ata_link_err(link
, "exception Emask 0x%x "
2566 "SAct 0x%x SErr 0x%x action 0x%x%s%s\n",
2567 ehc
->i
.err_mask
, link
->sactive
, ehc
->i
.serror
,
2568 ehc
->i
.action
, frozen
, tries_buf
);
2570 ata_link_err(link
, "%s\n", desc
);
2573 #ifdef CONFIG_ATA_VERBOSE_ERROR
2576 "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n",
2577 ehc
->i
.serror
& SERR_DATA_RECOVERED
? "RecovData " : "",
2578 ehc
->i
.serror
& SERR_COMM_RECOVERED
? "RecovComm " : "",
2579 ehc
->i
.serror
& SERR_DATA
? "UnrecovData " : "",
2580 ehc
->i
.serror
& SERR_PERSISTENT
? "Persist " : "",
2581 ehc
->i
.serror
& SERR_PROTOCOL
? "Proto " : "",
2582 ehc
->i
.serror
& SERR_INTERNAL
? "HostInt " : "",
2583 ehc
->i
.serror
& SERR_PHYRDY_CHG
? "PHYRdyChg " : "",
2584 ehc
->i
.serror
& SERR_PHY_INT_ERR
? "PHYInt " : "",
2585 ehc
->i
.serror
& SERR_COMM_WAKE
? "CommWake " : "",
2586 ehc
->i
.serror
& SERR_10B_8B_ERR
? "10B8B " : "",
2587 ehc
->i
.serror
& SERR_DISPARITY
? "Dispar " : "",
2588 ehc
->i
.serror
& SERR_CRC
? "BadCRC " : "",
2589 ehc
->i
.serror
& SERR_HANDSHAKE
? "Handshk " : "",
2590 ehc
->i
.serror
& SERR_LINK_SEQ_ERR
? "LinkSeq " : "",
2591 ehc
->i
.serror
& SERR_TRANS_ST_ERROR
? "TrStaTrns " : "",
2592 ehc
->i
.serror
& SERR_UNRECOG_FIS
? "UnrecFIS " : "",
2593 ehc
->i
.serror
& SERR_DEV_XCHG
? "DevExch " : "");
2596 for (tag
= 0; tag
< ATA_MAX_QUEUE
; tag
++) {
2597 struct ata_queued_cmd
*qc
= __ata_qc_from_tag(ap
, tag
);
2598 struct ata_taskfile
*cmd
= &qc
->tf
, *res
= &qc
->result_tf
;
2599 char data_buf
[20] = "";
2600 char cdb_buf
[70] = "";
2602 if (!(qc
->flags
& ATA_QCFLAG_FAILED
) ||
2603 ata_dev_phys_link(qc
->dev
) != link
|| !qc
->err_mask
)
2606 if (qc
->dma_dir
!= DMA_NONE
) {
2607 static const char *dma_str
[] = {
2608 [DMA_BIDIRECTIONAL
] = "bidi",
2609 [DMA_TO_DEVICE
] = "out",
2610 [DMA_FROM_DEVICE
] = "in",
2612 static const char *prot_str
[] = {
2613 [ATA_PROT_PIO
] = "pio",
2614 [ATA_PROT_DMA
] = "dma",
2615 [ATA_PROT_NCQ
] = "ncq",
2616 [ATAPI_PROT_PIO
] = "pio",
2617 [ATAPI_PROT_DMA
] = "dma",
2620 snprintf(data_buf
, sizeof(data_buf
), " %s %u %s",
2621 prot_str
[qc
->tf
.protocol
], qc
->nbytes
,
2622 dma_str
[qc
->dma_dir
]);
2625 if (ata_is_atapi(qc
->tf
.protocol
)) {
2626 const u8
*cdb
= qc
->cdb
;
2627 size_t cdb_len
= qc
->dev
->cdb_len
;
2630 cdb
= qc
->scsicmd
->cmnd
;
2631 cdb_len
= qc
->scsicmd
->cmd_len
;
2633 __scsi_format_command(cdb_buf
, sizeof(cdb_buf
),
2636 const char *descr
= ata_get_cmd_descript(cmd
->command
);
2638 ata_dev_err(qc
->dev
, "failed command: %s\n",
2642 ata_dev_err(qc
->dev
,
2643 "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x "
2645 "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x "
2646 "Emask 0x%x (%s)%s\n",
2647 cmd
->command
, cmd
->feature
, cmd
->nsect
,
2648 cmd
->lbal
, cmd
->lbam
, cmd
->lbah
,
2649 cmd
->hob_feature
, cmd
->hob_nsect
,
2650 cmd
->hob_lbal
, cmd
->hob_lbam
, cmd
->hob_lbah
,
2651 cmd
->device
, qc
->tag
, data_buf
, cdb_buf
,
2652 res
->command
, res
->feature
, res
->nsect
,
2653 res
->lbal
, res
->lbam
, res
->lbah
,
2654 res
->hob_feature
, res
->hob_nsect
,
2655 res
->hob_lbal
, res
->hob_lbam
, res
->hob_lbah
,
2656 res
->device
, qc
->err_mask
, ata_err_string(qc
->err_mask
),
2657 qc
->err_mask
& AC_ERR_NCQ
? " <F>" : "");
2659 #ifdef CONFIG_ATA_VERBOSE_ERROR
2660 if (res
->command
& (ATA_BUSY
| ATA_DRDY
| ATA_DF
| ATA_DRQ
|
2661 ATA_SENSE
| ATA_ERR
)) {
2662 if (res
->command
& ATA_BUSY
)
2663 ata_dev_err(qc
->dev
, "status: { Busy }\n");
2665 ata_dev_err(qc
->dev
, "status: { %s%s%s%s%s}\n",
2666 res
->command
& ATA_DRDY
? "DRDY " : "",
2667 res
->command
& ATA_DF
? "DF " : "",
2668 res
->command
& ATA_DRQ
? "DRQ " : "",
2669 res
->command
& ATA_SENSE
? "SENSE " : "",
2670 res
->command
& ATA_ERR
? "ERR " : "");
2673 if (cmd
->command
!= ATA_CMD_PACKET
&&
2674 (res
->feature
& (ATA_ICRC
| ATA_UNC
| ATA_AMNF
|
2675 ATA_IDNF
| ATA_ABORTED
)))
2676 ata_dev_err(qc
->dev
, "error: { %s%s%s%s%s}\n",
2677 res
->feature
& ATA_ICRC
? "ICRC " : "",
2678 res
->feature
& ATA_UNC
? "UNC " : "",
2679 res
->feature
& ATA_AMNF
? "AMNF " : "",
2680 res
->feature
& ATA_IDNF
? "IDNF " : "",
2681 res
->feature
& ATA_ABORTED
? "ABRT " : "");
2687 * ata_eh_report - report error handling to user
2688 * @ap: ATA port to report EH about
2690 * Report EH to user.
2695 void ata_eh_report(struct ata_port
*ap
)
2697 struct ata_link
*link
;
2699 ata_for_each_link(link
, ap
, HOST_FIRST
)
2700 ata_eh_link_report(link
);
2703 static int ata_do_reset(struct ata_link
*link
, ata_reset_fn_t reset
,
2704 unsigned int *classes
, unsigned long deadline
,
2707 struct ata_device
*dev
;
2710 ata_for_each_dev(dev
, link
, ALL
)
2711 classes
[dev
->devno
] = ATA_DEV_UNKNOWN
;
2713 return reset(link
, classes
, deadline
);
2716 static int ata_eh_followup_srst_needed(struct ata_link
*link
, int rc
)
2718 if ((link
->flags
& ATA_LFLAG_NO_SRST
) || ata_link_offline(link
))
2722 if (sata_pmp_supported(link
->ap
) && ata_is_host_link(link
))
2727 int ata_eh_reset(struct ata_link
*link
, int classify
,
2728 ata_prereset_fn_t prereset
, ata_reset_fn_t softreset
,
2729 ata_reset_fn_t hardreset
, ata_postreset_fn_t postreset
)
2731 struct ata_port
*ap
= link
->ap
;
2732 struct ata_link
*slave
= ap
->slave_link
;
2733 struct ata_eh_context
*ehc
= &link
->eh_context
;
2734 struct ata_eh_context
*sehc
= slave
? &slave
->eh_context
: NULL
;
2735 unsigned int *classes
= ehc
->classes
;
2736 unsigned int lflags
= link
->flags
;
2737 int verbose
= !(ehc
->i
.flags
& ATA_EHI_QUIET
);
2738 int max_tries
= 0, try = 0;
2739 struct ata_link
*failed_link
;
2740 struct ata_device
*dev
;
2741 unsigned long deadline
, now
;
2742 ata_reset_fn_t reset
;
2743 unsigned long flags
;
2750 while (ata_eh_reset_timeouts
[max_tries
] != ULONG_MAX
)
2752 if (link
->flags
& ATA_LFLAG_RST_ONCE
)
2754 if (link
->flags
& ATA_LFLAG_NO_HRST
)
2756 if (link
->flags
& ATA_LFLAG_NO_SRST
)
2759 /* make sure each reset attempt is at least COOL_DOWN apart */
2760 if (ehc
->i
.flags
& ATA_EHI_DID_RESET
) {
2762 WARN_ON(time_after(ehc
->last_reset
, now
));
2763 deadline
= ata_deadline(ehc
->last_reset
,
2764 ATA_EH_RESET_COOL_DOWN
);
2765 if (time_before(now
, deadline
))
2766 schedule_timeout_uninterruptible(deadline
- now
);
2769 spin_lock_irqsave(ap
->lock
, flags
);
2770 ap
->pflags
|= ATA_PFLAG_RESETTING
;
2771 spin_unlock_irqrestore(ap
->lock
, flags
);
2773 ata_eh_about_to_do(link
, NULL
, ATA_EH_RESET
);
2775 ata_for_each_dev(dev
, link
, ALL
) {
2776 /* If we issue an SRST then an ATA drive (not ATAPI)
2777 * may change configuration and be in PIO0 timing. If
2778 * we do a hard reset (or are coming from power on)
2779 * this is true for ATA or ATAPI. Until we've set a
2780 * suitable controller mode we should not touch the
2781 * bus as we may be talking too fast.
2783 dev
->pio_mode
= XFER_PIO_0
;
2784 dev
->dma_mode
= 0xff;
2786 /* If the controller has a pio mode setup function
2787 * then use it to set the chipset to rights. Don't
2788 * touch the DMA setup as that will be dealt with when
2789 * configuring devices.
2791 if (ap
->ops
->set_piomode
)
2792 ap
->ops
->set_piomode(ap
, dev
);
2795 /* prefer hardreset */
2797 ehc
->i
.action
&= ~ATA_EH_RESET
;
2800 ehc
->i
.action
|= ATA_EH_HARDRESET
;
2801 } else if (softreset
) {
2803 ehc
->i
.action
|= ATA_EH_SOFTRESET
;
2807 unsigned long deadline
= ata_deadline(jiffies
,
2808 ATA_EH_PRERESET_TIMEOUT
);
2811 sehc
->i
.action
&= ~ATA_EH_RESET
;
2812 sehc
->i
.action
|= ehc
->i
.action
;
2815 rc
= prereset(link
, deadline
);
2817 /* If present, do prereset on slave link too. Reset
2818 * is skipped iff both master and slave links report
2819 * -ENOENT or clear ATA_EH_RESET.
2821 if (slave
&& (rc
== 0 || rc
== -ENOENT
)) {
2824 tmp
= prereset(slave
, deadline
);
2828 ehc
->i
.action
|= sehc
->i
.action
;
2832 if (rc
== -ENOENT
) {
2833 ata_link_dbg(link
, "port disabled--ignoring\n");
2834 ehc
->i
.action
&= ~ATA_EH_RESET
;
2836 ata_for_each_dev(dev
, link
, ALL
)
2837 classes
[dev
->devno
] = ATA_DEV_NONE
;
2842 "prereset failed (errno=%d)\n",
2847 /* prereset() might have cleared ATA_EH_RESET. If so,
2848 * bang classes, thaw and return.
2850 if (reset
&& !(ehc
->i
.action
& ATA_EH_RESET
)) {
2851 ata_for_each_dev(dev
, link
, ALL
)
2852 classes
[dev
->devno
] = ATA_DEV_NONE
;
2853 if ((ap
->pflags
& ATA_PFLAG_FROZEN
) &&
2854 ata_is_host_link(link
))
2855 ata_eh_thaw_port(ap
);
2865 if (ata_is_host_link(link
))
2866 ata_eh_freeze_port(ap
);
2868 deadline
= ata_deadline(jiffies
, ata_eh_reset_timeouts
[try++]);
2872 ata_link_info(link
, "%s resetting link\n",
2873 reset
== softreset
? "soft" : "hard");
2875 /* mark that this EH session started with reset */
2876 ehc
->last_reset
= jiffies
;
2877 if (reset
== hardreset
)
2878 ehc
->i
.flags
|= ATA_EHI_DID_HARDRESET
;
2880 ehc
->i
.flags
|= ATA_EHI_DID_SOFTRESET
;
2882 rc
= ata_do_reset(link
, reset
, classes
, deadline
, true);
2883 if (rc
&& rc
!= -EAGAIN
) {
2888 /* hardreset slave link if existent */
2889 if (slave
&& reset
== hardreset
) {
2893 ata_link_info(slave
, "hard resetting link\n");
2895 ata_eh_about_to_do(slave
, NULL
, ATA_EH_RESET
);
2896 tmp
= ata_do_reset(slave
, reset
, classes
, deadline
,
2904 failed_link
= slave
;
2910 /* perform follow-up SRST if necessary */
2911 if (reset
== hardreset
&&
2912 ata_eh_followup_srst_needed(link
, rc
)) {
2917 "follow-up softreset required but no softreset available\n");
2923 ata_eh_about_to_do(link
, NULL
, ATA_EH_RESET
);
2924 rc
= ata_do_reset(link
, reset
, classes
, deadline
, true);
2933 "no reset method available, skipping reset\n");
2934 if (!(lflags
& ATA_LFLAG_ASSUME_CLASS
))
2935 lflags
|= ATA_LFLAG_ASSUME_ATA
;
2939 * Post-reset processing
2941 ata_for_each_dev(dev
, link
, ALL
) {
2942 /* After the reset, the device state is PIO 0 and the
2943 * controller state is undefined. Reset also wakes up
2944 * drives from sleeping mode.
2946 dev
->pio_mode
= XFER_PIO_0
;
2947 dev
->flags
&= ~ATA_DFLAG_SLEEPING
;
2949 if (ata_phys_link_offline(ata_dev_phys_link(dev
)))
2952 /* apply class override */
2953 if (lflags
& ATA_LFLAG_ASSUME_ATA
)
2954 classes
[dev
->devno
] = ATA_DEV_ATA
;
2955 else if (lflags
& ATA_LFLAG_ASSUME_SEMB
)
2956 classes
[dev
->devno
] = ATA_DEV_SEMB_UNSUP
;
2959 /* record current link speed */
2960 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0)
2961 link
->sata_spd
= (sstatus
>> 4) & 0xf;
2962 if (slave
&& sata_scr_read(slave
, SCR_STATUS
, &sstatus
) == 0)
2963 slave
->sata_spd
= (sstatus
>> 4) & 0xf;
2966 if (ata_is_host_link(link
))
2967 ata_eh_thaw_port(ap
);
2969 /* postreset() should clear hardware SError. Although SError
2970 * is cleared during link resume, clearing SError here is
2971 * necessary as some PHYs raise hotplug events after SRST.
2972 * This introduces race condition where hotplug occurs between
2973 * reset and here. This race is mediated by cross checking
2974 * link onlineness and classification result later.
2977 postreset(link
, classes
);
2979 postreset(slave
, classes
);
2983 * Some controllers can't be frozen very well and may set spurious
2984 * error conditions during reset. Clear accumulated error
2985 * information and re-thaw the port if frozen. As reset is the
2986 * final recovery action and we cross check link onlineness against
2987 * device classification later, no hotplug event is lost by this.
2989 spin_lock_irqsave(link
->ap
->lock
, flags
);
2990 memset(&link
->eh_info
, 0, sizeof(link
->eh_info
));
2992 memset(&slave
->eh_info
, 0, sizeof(link
->eh_info
));
2993 ap
->pflags
&= ~ATA_PFLAG_EH_PENDING
;
2994 spin_unlock_irqrestore(link
->ap
->lock
, flags
);
2996 if (ap
->pflags
& ATA_PFLAG_FROZEN
)
2997 ata_eh_thaw_port(ap
);
3000 * Make sure onlineness and classification result correspond.
3001 * Hotplug could have happened during reset and some
3002 * controllers fail to wait while a drive is spinning up after
3003 * being hotplugged causing misdetection. By cross checking
3004 * link on/offlineness and classification result, those
3005 * conditions can be reliably detected and retried.
3008 ata_for_each_dev(dev
, link
, ALL
) {
3009 if (ata_phys_link_online(ata_dev_phys_link(dev
))) {
3010 if (classes
[dev
->devno
] == ATA_DEV_UNKNOWN
) {
3011 ata_dev_dbg(dev
, "link online but device misclassified\n");
3012 classes
[dev
->devno
] = ATA_DEV_NONE
;
3015 } else if (ata_phys_link_offline(ata_dev_phys_link(dev
))) {
3016 if (ata_class_enabled(classes
[dev
->devno
]))
3018 "link offline, clearing class %d to NONE\n",
3019 classes
[dev
->devno
]);
3020 classes
[dev
->devno
] = ATA_DEV_NONE
;
3021 } else if (classes
[dev
->devno
] == ATA_DEV_UNKNOWN
) {
3023 "link status unknown, clearing UNKNOWN to NONE\n");
3024 classes
[dev
->devno
] = ATA_DEV_NONE
;
3028 if (classify
&& nr_unknown
) {
3029 if (try < max_tries
) {
3031 "link online but %d devices misclassified, retrying\n",
3038 "link online but %d devices misclassified, "
3039 "device detection might fail\n", nr_unknown
);
3042 /* reset successful, schedule revalidation */
3043 ata_eh_done(link
, NULL
, ATA_EH_RESET
);
3045 ata_eh_done(slave
, NULL
, ATA_EH_RESET
);
3046 ehc
->last_reset
= jiffies
; /* update to completion time */
3047 ehc
->i
.action
|= ATA_EH_REVALIDATE
;
3048 link
->lpm_policy
= ATA_LPM_UNKNOWN
; /* reset LPM state */
3052 /* clear hotplug flag */
3053 ehc
->i
.flags
&= ~ATA_EHI_HOTPLUGGED
;
3055 sehc
->i
.flags
&= ~ATA_EHI_HOTPLUGGED
;
3057 spin_lock_irqsave(ap
->lock
, flags
);
3058 ap
->pflags
&= ~ATA_PFLAG_RESETTING
;
3059 spin_unlock_irqrestore(ap
->lock
, flags
);
3064 /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */
3065 if (!ata_is_host_link(link
) &&
3066 sata_scr_read(link
, SCR_STATUS
, &sstatus
))
3069 if (try >= max_tries
) {
3071 * Thaw host port even if reset failed, so that the port
3072 * can be retried on the next phy event. This risks
3073 * repeated EH runs but seems to be a better tradeoff than
3074 * shutting down a port after a botched hotplug attempt.
3076 if (ata_is_host_link(link
))
3077 ata_eh_thaw_port(ap
);
3082 if (time_before(now
, deadline
)) {
3083 unsigned long delta
= deadline
- now
;
3085 ata_link_warn(failed_link
,
3086 "reset failed (errno=%d), retrying in %u secs\n",
3087 rc
, DIV_ROUND_UP(jiffies_to_msecs(delta
), 1000));
3091 delta
= schedule_timeout_uninterruptible(delta
);
3096 * While disks spinup behind PMP, some controllers fail sending SRST.
3097 * They need to be reset - as well as the PMP - before retrying.
3099 if (rc
== -ERESTART
) {
3100 if (ata_is_host_link(link
))
3101 ata_eh_thaw_port(ap
);
3105 if (try == max_tries
- 1) {
3106 sata_down_spd_limit(link
, 0);
3108 sata_down_spd_limit(slave
, 0);
3109 } else if (rc
== -EPIPE
)
3110 sata_down_spd_limit(failed_link
, 0);
3117 static inline void ata_eh_pull_park_action(struct ata_port
*ap
)
3119 struct ata_link
*link
;
3120 struct ata_device
*dev
;
3121 unsigned long flags
;
3124 * This function can be thought of as an extended version of
3125 * ata_eh_about_to_do() specially crafted to accommodate the
3126 * requirements of ATA_EH_PARK handling. Since the EH thread
3127 * does not leave the do {} while () loop in ata_eh_recover as
3128 * long as the timeout for a park request to *one* device on
3129 * the port has not expired, and since we still want to pick
3130 * up park requests to other devices on the same port or
3131 * timeout updates for the same device, we have to pull
3132 * ATA_EH_PARK actions from eh_info into eh_context.i
3133 * ourselves at the beginning of each pass over the loop.
3135 * Additionally, all write accesses to &ap->park_req_pending
3136 * through reinit_completion() (see below) or complete_all()
3137 * (see ata_scsi_park_store()) are protected by the host lock.
3138 * As a result we have that park_req_pending.done is zero on
3139 * exit from this function, i.e. when ATA_EH_PARK actions for
3140 * *all* devices on port ap have been pulled into the
3141 * respective eh_context structs. If, and only if,
3142 * park_req_pending.done is non-zero by the time we reach
3143 * wait_for_completion_timeout(), another ATA_EH_PARK action
3144 * has been scheduled for at least one of the devices on port
3145 * ap and we have to cycle over the do {} while () loop in
3146 * ata_eh_recover() again.
3149 spin_lock_irqsave(ap
->lock
, flags
);
3150 reinit_completion(&ap
->park_req_pending
);
3151 ata_for_each_link(link
, ap
, EDGE
) {
3152 ata_for_each_dev(dev
, link
, ALL
) {
3153 struct ata_eh_info
*ehi
= &link
->eh_info
;
3155 link
->eh_context
.i
.dev_action
[dev
->devno
] |=
3156 ehi
->dev_action
[dev
->devno
] & ATA_EH_PARK
;
3157 ata_eh_clear_action(link
, dev
, ehi
, ATA_EH_PARK
);
3160 spin_unlock_irqrestore(ap
->lock
, flags
);
3163 static void ata_eh_park_issue_cmd(struct ata_device
*dev
, int park
)
3165 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3166 struct ata_taskfile tf
;
3167 unsigned int err_mask
;
3169 ata_tf_init(dev
, &tf
);
3171 ehc
->unloaded_mask
|= 1 << dev
->devno
;
3172 tf
.command
= ATA_CMD_IDLEIMMEDIATE
;
3178 ehc
->unloaded_mask
&= ~(1 << dev
->devno
);
3179 tf
.command
= ATA_CMD_CHK_POWER
;
3182 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3183 tf
.protocol
|= ATA_PROT_NODATA
;
3184 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
3185 if (park
&& (err_mask
|| tf
.lbal
!= 0xc4)) {
3186 ata_dev_err(dev
, "head unload failed!\n");
3187 ehc
->unloaded_mask
&= ~(1 << dev
->devno
);
3191 static int ata_eh_revalidate_and_attach(struct ata_link
*link
,
3192 struct ata_device
**r_failed_dev
)
3194 struct ata_port
*ap
= link
->ap
;
3195 struct ata_eh_context
*ehc
= &link
->eh_context
;
3196 struct ata_device
*dev
;
3197 unsigned int new_mask
= 0;
3198 unsigned long flags
;
3203 /* For PATA drive side cable detection to work, IDENTIFY must
3204 * be done backwards such that PDIAG- is released by the slave
3205 * device before the master device is identified.
3207 ata_for_each_dev(dev
, link
, ALL_REVERSE
) {
3208 unsigned int action
= ata_eh_dev_action(dev
);
3209 unsigned int readid_flags
= 0;
3211 if (ehc
->i
.flags
& ATA_EHI_DID_RESET
)
3212 readid_flags
|= ATA_READID_POSTRESET
;
3214 if ((action
& ATA_EH_REVALIDATE
) && ata_dev_enabled(dev
)) {
3215 WARN_ON(dev
->class == ATA_DEV_PMP
);
3217 if (ata_phys_link_offline(ata_dev_phys_link(dev
))) {
3222 ata_eh_about_to_do(link
, dev
, ATA_EH_REVALIDATE
);
3223 rc
= ata_dev_revalidate(dev
, ehc
->classes
[dev
->devno
],
3228 ata_eh_done(link
, dev
, ATA_EH_REVALIDATE
);
3230 /* Configuration may have changed, reconfigure
3233 ehc
->i
.flags
|= ATA_EHI_SETMODE
;
3235 /* schedule the scsi_rescan_device() here */
3236 schedule_work(&(ap
->scsi_rescan_task
));
3237 } else if (dev
->class == ATA_DEV_UNKNOWN
&&
3238 ehc
->tries
[dev
->devno
] &&
3239 ata_class_enabled(ehc
->classes
[dev
->devno
])) {
3240 /* Temporarily set dev->class, it will be
3241 * permanently set once all configurations are
3242 * complete. This is necessary because new
3243 * device configuration is done in two
3246 dev
->class = ehc
->classes
[dev
->devno
];
3248 if (dev
->class == ATA_DEV_PMP
)
3249 rc
= sata_pmp_attach(dev
);
3251 rc
= ata_dev_read_id(dev
, &dev
->class,
3252 readid_flags
, dev
->id
);
3254 /* read_id might have changed class, store and reset */
3255 ehc
->classes
[dev
->devno
] = dev
->class;
3256 dev
->class = ATA_DEV_UNKNOWN
;
3260 /* clear error info accumulated during probe */
3261 ata_ering_clear(&dev
->ering
);
3262 new_mask
|= 1 << dev
->devno
;
3265 /* IDENTIFY was issued to non-existent
3266 * device. No need to reset. Just
3267 * thaw and ignore the device.
3269 ata_eh_thaw_port(ap
);
3277 /* PDIAG- should have been released, ask cable type if post-reset */
3278 if ((ehc
->i
.flags
& ATA_EHI_DID_RESET
) && ata_is_host_link(link
)) {
3279 if (ap
->ops
->cable_detect
)
3280 ap
->cbl
= ap
->ops
->cable_detect(ap
);
3284 /* Configure new devices forward such that user doesn't see
3285 * device detection messages backwards.
3287 ata_for_each_dev(dev
, link
, ALL
) {
3288 if (!(new_mask
& (1 << dev
->devno
)))
3291 dev
->class = ehc
->classes
[dev
->devno
];
3293 if (dev
->class == ATA_DEV_PMP
)
3296 ehc
->i
.flags
|= ATA_EHI_PRINTINFO
;
3297 rc
= ata_dev_configure(dev
);
3298 ehc
->i
.flags
&= ~ATA_EHI_PRINTINFO
;
3300 dev
->class = ATA_DEV_UNKNOWN
;
3304 spin_lock_irqsave(ap
->lock
, flags
);
3305 ap
->pflags
|= ATA_PFLAG_SCSI_HOTPLUG
;
3306 spin_unlock_irqrestore(ap
->lock
, flags
);
3308 /* new device discovered, configure xfermode */
3309 ehc
->i
.flags
|= ATA_EHI_SETMODE
;
3315 *r_failed_dev
= dev
;
3316 DPRINTK("EXIT rc=%d\n", rc
);
3321 * ata_set_mode - Program timings and issue SET FEATURES - XFER
3322 * @link: link on which timings will be programmed
3323 * @r_failed_dev: out parameter for failed device
3325 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3326 * ata_set_mode() fails, pointer to the failing device is
3327 * returned in @r_failed_dev.
3330 * PCI/etc. bus probe sem.
3333 * 0 on success, negative errno otherwise
3335 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3337 struct ata_port
*ap
= link
->ap
;
3338 struct ata_device
*dev
;
3341 /* if data transfer is verified, clear DUBIOUS_XFER on ering top */
3342 ata_for_each_dev(dev
, link
, ENABLED
) {
3343 if (!(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
)) {
3344 struct ata_ering_entry
*ent
;
3346 ent
= ata_ering_top(&dev
->ering
);
3348 ent
->eflags
&= ~ATA_EFLAG_DUBIOUS_XFER
;
3352 /* has private set_mode? */
3353 if (ap
->ops
->set_mode
)
3354 rc
= ap
->ops
->set_mode(link
, r_failed_dev
);
3356 rc
= ata_do_set_mode(link
, r_failed_dev
);
3358 /* if transfer mode has changed, set DUBIOUS_XFER on device */
3359 ata_for_each_dev(dev
, link
, ENABLED
) {
3360 struct ata_eh_context
*ehc
= &link
->eh_context
;
3361 u8 saved_xfer_mode
= ehc
->saved_xfer_mode
[dev
->devno
];
3362 u8 saved_ncq
= !!(ehc
->saved_ncq_enabled
& (1 << dev
->devno
));
3364 if (dev
->xfer_mode
!= saved_xfer_mode
||
3365 ata_ncq_enabled(dev
) != saved_ncq
)
3366 dev
->flags
|= ATA_DFLAG_DUBIOUS_XFER
;
3373 * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset
3374 * @dev: ATAPI device to clear UA for
3376 * Resets and other operations can make an ATAPI device raise
3377 * UNIT ATTENTION which causes the next operation to fail. This
3378 * function clears UA.
3381 * EH context (may sleep).
3384 * 0 on success, -errno on failure.
3386 static int atapi_eh_clear_ua(struct ata_device
*dev
)
3390 for (i
= 0; i
< ATA_EH_UA_TRIES
; i
++) {
3391 u8
*sense_buffer
= dev
->link
->ap
->sector_buf
;
3393 unsigned int err_mask
;
3395 err_mask
= atapi_eh_tur(dev
, &sense_key
);
3396 if (err_mask
!= 0 && err_mask
!= AC_ERR_DEV
) {
3398 "TEST_UNIT_READY failed (err_mask=0x%x)\n",
3403 if (!err_mask
|| sense_key
!= UNIT_ATTENTION
)
3406 err_mask
= atapi_eh_request_sense(dev
, sense_buffer
, sense_key
);
3408 ata_dev_warn(dev
, "failed to clear "
3409 "UNIT ATTENTION (err_mask=0x%x)\n", err_mask
);
3414 ata_dev_warn(dev
, "UNIT ATTENTION persists after %d tries\n",
3421 * ata_eh_maybe_retry_flush - Retry FLUSH if necessary
3422 * @dev: ATA device which may need FLUSH retry
3424 * If @dev failed FLUSH, it needs to be reported upper layer
3425 * immediately as it means that @dev failed to remap and already
3426 * lost at least a sector and further FLUSH retrials won't make
3427 * any difference to the lost sector. However, if FLUSH failed
3428 * for other reasons, for example transmission error, FLUSH needs
3431 * This function determines whether FLUSH failure retry is
3432 * necessary and performs it if so.
3435 * 0 if EH can continue, -errno if EH needs to be repeated.
3437 static int ata_eh_maybe_retry_flush(struct ata_device
*dev
)
3439 struct ata_link
*link
= dev
->link
;
3440 struct ata_port
*ap
= link
->ap
;
3441 struct ata_queued_cmd
*qc
;
3442 struct ata_taskfile tf
;
3443 unsigned int err_mask
;
3446 /* did flush fail for this device? */
3447 if (!ata_tag_valid(link
->active_tag
))
3450 qc
= __ata_qc_from_tag(ap
, link
->active_tag
);
3451 if (qc
->dev
!= dev
|| (qc
->tf
.command
!= ATA_CMD_FLUSH_EXT
&&
3452 qc
->tf
.command
!= ATA_CMD_FLUSH
))
3455 /* if the device failed it, it should be reported to upper layers */
3456 if (qc
->err_mask
& AC_ERR_DEV
)
3459 /* flush failed for some other reason, give it another shot */
3460 ata_tf_init(dev
, &tf
);
3462 tf
.command
= qc
->tf
.command
;
3463 tf
.flags
|= ATA_TFLAG_DEVICE
;
3464 tf
.protocol
= ATA_PROT_NODATA
;
3466 ata_dev_warn(dev
, "retrying FLUSH 0x%x Emask 0x%x\n",
3467 tf
.command
, qc
->err_mask
);
3469 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
3472 * FLUSH is complete but there's no way to
3473 * successfully complete a failed command from EH.
3474 * Making sure retry is allowed at least once and
3475 * retrying it should do the trick - whatever was in
3476 * the cache is already on the platter and this won't
3477 * cause infinite loop.
3479 qc
->scsicmd
->allowed
= max(qc
->scsicmd
->allowed
, 1);
3481 ata_dev_warn(dev
, "FLUSH failed Emask 0x%x\n",
3485 /* if device failed it, report it to upper layers */
3486 if (err_mask
& AC_ERR_DEV
) {
3487 qc
->err_mask
|= AC_ERR_DEV
;
3489 if (!(ap
->pflags
& ATA_PFLAG_FROZEN
))
3497 * ata_eh_set_lpm - configure SATA interface power management
3498 * @link: link to configure power management
3499 * @policy: the link power management policy
3500 * @r_failed_dev: out parameter for failed device
3502 * Enable SATA Interface power management. This will enable
3503 * Device Interface Power Management (DIPM) for min_power
3504 * policy, and then call driver specific callbacks for
3505 * enabling Host Initiated Power management.
3511 * 0 on success, -errno on failure.
3513 static int ata_eh_set_lpm(struct ata_link
*link
, enum ata_lpm_policy policy
,
3514 struct ata_device
**r_failed_dev
)
3516 struct ata_port
*ap
= ata_is_host_link(link
) ? link
->ap
: NULL
;
3517 struct ata_eh_context
*ehc
= &link
->eh_context
;
3518 struct ata_device
*dev
, *link_dev
= NULL
, *lpm_dev
= NULL
;
3519 enum ata_lpm_policy old_policy
= link
->lpm_policy
;
3520 bool no_dipm
= link
->ap
->flags
& ATA_FLAG_NO_DIPM
;
3521 unsigned int hints
= ATA_LPM_EMPTY
| ATA_LPM_HIPM
;
3522 unsigned int err_mask
;
3525 /* if the link or host doesn't do LPM, noop */
3526 if ((link
->flags
& ATA_LFLAG_NO_LPM
) || (ap
&& !ap
->ops
->set_lpm
))
3530 * DIPM is enabled only for MIN_POWER as some devices
3531 * misbehave when the host NACKs transition to SLUMBER. Order
3532 * device and link configurations such that the host always
3533 * allows DIPM requests.
3535 ata_for_each_dev(dev
, link
, ENABLED
) {
3536 bool hipm
= ata_id_has_hipm(dev
->id
);
3537 bool dipm
= ata_id_has_dipm(dev
->id
) && !no_dipm
;
3539 /* find the first enabled and LPM enabled devices */
3543 if (!lpm_dev
&& (hipm
|| dipm
))
3546 hints
&= ~ATA_LPM_EMPTY
;
3548 hints
&= ~ATA_LPM_HIPM
;
3550 /* disable DIPM before changing link config */
3551 if (policy
!= ATA_LPM_MIN_POWER
&& dipm
) {
3552 err_mask
= ata_dev_set_feature(dev
,
3553 SETFEATURES_SATA_DISABLE
, SATA_DIPM
);
3554 if (err_mask
&& err_mask
!= AC_ERR_DEV
) {
3556 "failed to disable DIPM, Emask 0x%x\n",
3565 rc
= ap
->ops
->set_lpm(link
, policy
, hints
);
3566 if (!rc
&& ap
->slave_link
)
3567 rc
= ap
->ops
->set_lpm(ap
->slave_link
, policy
, hints
);
3569 rc
= sata_pmp_set_lpm(link
, policy
, hints
);
3572 * Attribute link config failure to the first (LPM) enabled
3573 * device on the link.
3576 if (rc
== -EOPNOTSUPP
) {
3577 link
->flags
|= ATA_LFLAG_NO_LPM
;
3580 dev
= lpm_dev
? lpm_dev
: link_dev
;
3585 * Low level driver acked the transition. Issue DIPM command
3586 * with the new policy set.
3588 link
->lpm_policy
= policy
;
3589 if (ap
&& ap
->slave_link
)
3590 ap
->slave_link
->lpm_policy
= policy
;
3592 /* host config updated, enable DIPM if transitioning to MIN_POWER */
3593 ata_for_each_dev(dev
, link
, ENABLED
) {
3594 if (policy
== ATA_LPM_MIN_POWER
&& !no_dipm
&&
3595 ata_id_has_dipm(dev
->id
)) {
3596 err_mask
= ata_dev_set_feature(dev
,
3597 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
3598 if (err_mask
&& err_mask
!= AC_ERR_DEV
) {
3600 "failed to enable DIPM, Emask 0x%x\n",
3608 link
->last_lpm_change
= jiffies
;
3609 link
->flags
|= ATA_LFLAG_CHANGED
;
3614 /* restore the old policy */
3615 link
->lpm_policy
= old_policy
;
3616 if (ap
&& ap
->slave_link
)
3617 ap
->slave_link
->lpm_policy
= old_policy
;
3619 /* if no device or only one more chance is left, disable LPM */
3620 if (!dev
|| ehc
->tries
[dev
->devno
] <= 2) {
3621 ata_link_warn(link
, "disabling LPM on the link\n");
3622 link
->flags
|= ATA_LFLAG_NO_LPM
;
3625 *r_failed_dev
= dev
;
3629 int ata_link_nr_enabled(struct ata_link
*link
)
3631 struct ata_device
*dev
;
3634 ata_for_each_dev(dev
, link
, ENABLED
)
3639 static int ata_link_nr_vacant(struct ata_link
*link
)
3641 struct ata_device
*dev
;
3644 ata_for_each_dev(dev
, link
, ALL
)
3645 if (dev
->class == ATA_DEV_UNKNOWN
)
3650 static int ata_eh_skip_recovery(struct ata_link
*link
)
3652 struct ata_port
*ap
= link
->ap
;
3653 struct ata_eh_context
*ehc
= &link
->eh_context
;
3654 struct ata_device
*dev
;
3656 /* skip disabled links */
3657 if (link
->flags
& ATA_LFLAG_DISABLED
)
3660 /* skip if explicitly requested */
3661 if (ehc
->i
.flags
& ATA_EHI_NO_RECOVERY
)
3664 /* thaw frozen port and recover failed devices */
3665 if ((ap
->pflags
& ATA_PFLAG_FROZEN
) || ata_link_nr_enabled(link
))
3668 /* reset at least once if reset is requested */
3669 if ((ehc
->i
.action
& ATA_EH_RESET
) &&
3670 !(ehc
->i
.flags
& ATA_EHI_DID_RESET
))
3673 /* skip if class codes for all vacant slots are ATA_DEV_NONE */
3674 ata_for_each_dev(dev
, link
, ALL
) {
3675 if (dev
->class == ATA_DEV_UNKNOWN
&&
3676 ehc
->classes
[dev
->devno
] != ATA_DEV_NONE
)
3683 static int ata_count_probe_trials_cb(struct ata_ering_entry
*ent
, void *void_arg
)
3685 u64 interval
= msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL
);
3686 u64 now
= get_jiffies_64();
3687 int *trials
= void_arg
;
3689 if ((ent
->eflags
& ATA_EFLAG_OLD_ER
) ||
3690 (ent
->timestamp
< now
- min(now
, interval
)))
3697 static int ata_eh_schedule_probe(struct ata_device
*dev
)
3699 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3700 struct ata_link
*link
= ata_dev_phys_link(dev
);
3703 if (!(ehc
->i
.probe_mask
& (1 << dev
->devno
)) ||
3704 (ehc
->did_probe_mask
& (1 << dev
->devno
)))
3707 ata_eh_detach_dev(dev
);
3709 ehc
->did_probe_mask
|= (1 << dev
->devno
);
3710 ehc
->i
.action
|= ATA_EH_RESET
;
3711 ehc
->saved_xfer_mode
[dev
->devno
] = 0;
3712 ehc
->saved_ncq_enabled
&= ~(1 << dev
->devno
);
3714 /* the link maybe in a deep sleep, wake it up */
3715 if (link
->lpm_policy
> ATA_LPM_MAX_POWER
) {
3716 if (ata_is_host_link(link
))
3717 link
->ap
->ops
->set_lpm(link
, ATA_LPM_MAX_POWER
,
3720 sata_pmp_set_lpm(link
, ATA_LPM_MAX_POWER
,
3724 /* Record and count probe trials on the ering. The specific
3725 * error mask used is irrelevant. Because a successful device
3726 * detection clears the ering, this count accumulates only if
3727 * there are consecutive failed probes.
3729 * If the count is equal to or higher than ATA_EH_PROBE_TRIALS
3730 * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is
3731 * forced to 1.5Gbps.
3733 * This is to work around cases where failed link speed
3734 * negotiation results in device misdetection leading to
3735 * infinite DEVXCHG or PHRDY CHG events.
3737 ata_ering_record(&dev
->ering
, 0, AC_ERR_OTHER
);
3738 ata_ering_map(&dev
->ering
, ata_count_probe_trials_cb
, &trials
);
3740 if (trials
> ATA_EH_PROBE_TRIALS
)
3741 sata_down_spd_limit(link
, 1);
3746 static int ata_eh_handle_dev_fail(struct ata_device
*dev
, int err
)
3748 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3750 /* -EAGAIN from EH routine indicates retry without prejudice.
3751 * The requester is responsible for ensuring forward progress.
3754 ehc
->tries
[dev
->devno
]--;
3758 /* device missing or wrong IDENTIFY data, schedule probing */
3759 ehc
->i
.probe_mask
|= (1 << dev
->devno
);
3761 /* give it just one more chance */
3762 ehc
->tries
[dev
->devno
] = min(ehc
->tries
[dev
->devno
], 1);
3764 if (ehc
->tries
[dev
->devno
] == 1) {
3765 /* This is the last chance, better to slow
3766 * down than lose it.
3768 sata_down_spd_limit(ata_dev_phys_link(dev
), 0);
3769 if (dev
->pio_mode
> XFER_PIO_0
)
3770 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
3774 if (ata_dev_enabled(dev
) && !ehc
->tries
[dev
->devno
]) {
3775 /* disable device if it has used up all its chances */
3776 ata_dev_disable(dev
);
3778 /* detach if offline */
3779 if (ata_phys_link_offline(ata_dev_phys_link(dev
)))
3780 ata_eh_detach_dev(dev
);
3782 /* schedule probe if necessary */
3783 if (ata_eh_schedule_probe(dev
)) {
3784 ehc
->tries
[dev
->devno
] = ATA_EH_DEV_TRIES
;
3785 memset(ehc
->cmd_timeout_idx
[dev
->devno
], 0,
3786 sizeof(ehc
->cmd_timeout_idx
[dev
->devno
]));
3791 ehc
->i
.action
|= ATA_EH_RESET
;
3797 * ata_eh_recover - recover host port after error
3798 * @ap: host port to recover
3799 * @prereset: prereset method (can be NULL)
3800 * @softreset: softreset method (can be NULL)
3801 * @hardreset: hardreset method (can be NULL)
3802 * @postreset: postreset method (can be NULL)
3803 * @r_failed_link: out parameter for failed link
3805 * This is the alpha and omega, eum and yang, heart and soul of
3806 * libata exception handling. On entry, actions required to
3807 * recover each link and hotplug requests are recorded in the
3808 * link's eh_context. This function executes all the operations
3809 * with appropriate retrials and fallbacks to resurrect failed
3810 * devices, detach goners and greet newcomers.
3813 * Kernel thread context (may sleep).
3816 * 0 on success, -errno on failure.
3818 int ata_eh_recover(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
3819 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
3820 ata_postreset_fn_t postreset
,
3821 struct ata_link
**r_failed_link
)
3823 struct ata_link
*link
;
3824 struct ata_device
*dev
;
3826 unsigned long flags
, deadline
;
3830 /* prep for recovery */
3831 ata_for_each_link(link
, ap
, EDGE
) {
3832 struct ata_eh_context
*ehc
= &link
->eh_context
;
3834 /* re-enable link? */
3835 if (ehc
->i
.action
& ATA_EH_ENABLE_LINK
) {
3836 ata_eh_about_to_do(link
, NULL
, ATA_EH_ENABLE_LINK
);
3837 spin_lock_irqsave(ap
->lock
, flags
);
3838 link
->flags
&= ~ATA_LFLAG_DISABLED
;
3839 spin_unlock_irqrestore(ap
->lock
, flags
);
3840 ata_eh_done(link
, NULL
, ATA_EH_ENABLE_LINK
);
3843 ata_for_each_dev(dev
, link
, ALL
) {
3844 if (link
->flags
& ATA_LFLAG_NO_RETRY
)
3845 ehc
->tries
[dev
->devno
] = 1;
3847 ehc
->tries
[dev
->devno
] = ATA_EH_DEV_TRIES
;
3849 /* collect port action mask recorded in dev actions */
3850 ehc
->i
.action
|= ehc
->i
.dev_action
[dev
->devno
] &
3851 ~ATA_EH_PERDEV_MASK
;
3852 ehc
->i
.dev_action
[dev
->devno
] &= ATA_EH_PERDEV_MASK
;
3854 /* process hotplug request */
3855 if (dev
->flags
& ATA_DFLAG_DETACH
)
3856 ata_eh_detach_dev(dev
);
3858 /* schedule probe if necessary */
3859 if (!ata_dev_enabled(dev
))
3860 ata_eh_schedule_probe(dev
);
3867 /* if UNLOADING, finish immediately */
3868 if (ap
->pflags
& ATA_PFLAG_UNLOADING
)
3872 ata_for_each_link(link
, ap
, EDGE
) {
3873 struct ata_eh_context
*ehc
= &link
->eh_context
;
3875 /* skip EH if possible. */
3876 if (ata_eh_skip_recovery(link
))
3879 ata_for_each_dev(dev
, link
, ALL
)
3880 ehc
->classes
[dev
->devno
] = ATA_DEV_UNKNOWN
;
3884 ata_for_each_link(link
, ap
, EDGE
) {
3885 struct ata_eh_context
*ehc
= &link
->eh_context
;
3887 if (!(ehc
->i
.action
& ATA_EH_RESET
))
3890 rc
= ata_eh_reset(link
, ata_link_nr_vacant(link
),
3891 prereset
, softreset
, hardreset
, postreset
);
3893 ata_link_err(link
, "reset failed, giving up\n");
3902 * clears ATA_EH_PARK in eh_info and resets
3903 * ap->park_req_pending
3905 ata_eh_pull_park_action(ap
);
3908 ata_for_each_link(link
, ap
, EDGE
) {
3909 ata_for_each_dev(dev
, link
, ALL
) {
3910 struct ata_eh_context
*ehc
= &link
->eh_context
;
3913 if (dev
->class != ATA_DEV_ATA
&&
3914 dev
->class != ATA_DEV_ZAC
)
3916 if (!(ehc
->i
.dev_action
[dev
->devno
] &
3919 tmp
= dev
->unpark_deadline
;
3920 if (time_before(deadline
, tmp
))
3922 else if (time_before_eq(tmp
, jiffies
))
3924 if (ehc
->unloaded_mask
& (1 << dev
->devno
))
3927 ata_eh_park_issue_cmd(dev
, 1);
3932 if (time_before_eq(deadline
, now
))
3936 deadline
= wait_for_completion_timeout(&ap
->park_req_pending
,
3940 ata_for_each_link(link
, ap
, EDGE
) {
3941 ata_for_each_dev(dev
, link
, ALL
) {
3942 if (!(link
->eh_context
.unloaded_mask
&
3946 ata_eh_park_issue_cmd(dev
, 0);
3947 ata_eh_done(link
, dev
, ATA_EH_PARK
);
3953 ata_for_each_link(link
, ap
, PMP_FIRST
) {
3954 struct ata_eh_context
*ehc
= &link
->eh_context
;
3956 if (sata_pmp_attached(ap
) && ata_is_host_link(link
))
3959 /* revalidate existing devices and attach new ones */
3960 rc
= ata_eh_revalidate_and_attach(link
, &dev
);
3964 /* if PMP got attached, return, pmp EH will take care of it */
3965 if (link
->device
->class == ATA_DEV_PMP
) {
3970 /* configure transfer mode if necessary */
3971 if (ehc
->i
.flags
& ATA_EHI_SETMODE
) {
3972 rc
= ata_set_mode(link
, &dev
);
3975 ehc
->i
.flags
&= ~ATA_EHI_SETMODE
;
3978 /* If reset has been issued, clear UA to avoid
3979 * disrupting the current users of the device.
3981 if (ehc
->i
.flags
& ATA_EHI_DID_RESET
) {
3982 ata_for_each_dev(dev
, link
, ALL
) {
3983 if (dev
->class != ATA_DEV_ATAPI
)
3985 rc
= atapi_eh_clear_ua(dev
);
3988 if (zpodd_dev_enabled(dev
))
3989 zpodd_post_poweron(dev
);
3993 /* retry flush if necessary */
3994 ata_for_each_dev(dev
, link
, ALL
) {
3995 if (dev
->class != ATA_DEV_ATA
&&
3996 dev
->class != ATA_DEV_ZAC
)
3998 rc
= ata_eh_maybe_retry_flush(dev
);
4004 /* configure link power saving */
4005 if (link
->lpm_policy
!= ap
->target_lpm_policy
) {
4006 rc
= ata_eh_set_lpm(link
, ap
->target_lpm_policy
, &dev
);
4011 /* this link is okay now */
4018 ata_eh_handle_dev_fail(dev
, rc
);
4020 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
4021 /* PMP reset requires working host port.
4022 * Can't retry if it's frozen.
4024 if (sata_pmp_attached(ap
))
4034 if (rc
&& r_failed_link
)
4035 *r_failed_link
= link
;
4037 DPRINTK("EXIT, rc=%d\n", rc
);
4042 * ata_eh_finish - finish up EH
4043 * @ap: host port to finish EH for
4045 * Recovery is complete. Clean up EH states and retry or finish
4051 void ata_eh_finish(struct ata_port
*ap
)
4055 /* retry or finish qcs */
4056 for (tag
= 0; tag
< ATA_MAX_QUEUE
; tag
++) {
4057 struct ata_queued_cmd
*qc
= __ata_qc_from_tag(ap
, tag
);
4059 if (!(qc
->flags
& ATA_QCFLAG_FAILED
))
4063 /* FIXME: Once EH migration is complete,
4064 * generate sense data in this function,
4065 * considering both err_mask and tf.
4067 if (qc
->flags
& ATA_QCFLAG_RETRY
)
4068 ata_eh_qc_retry(qc
);
4070 ata_eh_qc_complete(qc
);
4072 if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
) {
4073 ata_eh_qc_complete(qc
);
4075 /* feed zero TF to sense generation */
4076 memset(&qc
->result_tf
, 0, sizeof(qc
->result_tf
));
4077 ata_eh_qc_retry(qc
);
4082 /* make sure nr_active_links is zero after EH */
4083 WARN_ON(ap
->nr_active_links
);
4084 ap
->nr_active_links
= 0;
4088 * ata_do_eh - do standard error handling
4089 * @ap: host port to handle error for
4091 * @prereset: prereset method (can be NULL)
4092 * @softreset: softreset method (can be NULL)
4093 * @hardreset: hardreset method (can be NULL)
4094 * @postreset: postreset method (can be NULL)
4096 * Perform standard error handling sequence.
4099 * Kernel thread context (may sleep).
4101 void ata_do_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
4102 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
4103 ata_postreset_fn_t postreset
)
4105 struct ata_device
*dev
;
4111 rc
= ata_eh_recover(ap
, prereset
, softreset
, hardreset
, postreset
,
4114 ata_for_each_dev(dev
, &ap
->link
, ALL
)
4115 ata_dev_disable(dev
);
4122 * ata_std_error_handler - standard error handler
4123 * @ap: host port to handle error for
4125 * Standard error handler
4128 * Kernel thread context (may sleep).
4130 void ata_std_error_handler(struct ata_port
*ap
)
4132 struct ata_port_operations
*ops
= ap
->ops
;
4133 ata_reset_fn_t hardreset
= ops
->hardreset
;
4135 /* ignore built-in hardreset if SCR access is not available */
4136 if (hardreset
== sata_std_hardreset
&& !sata_scr_valid(&ap
->link
))
4139 ata_do_eh(ap
, ops
->prereset
, ops
->softreset
, hardreset
, ops
->postreset
);
4144 * ata_eh_handle_port_suspend - perform port suspend operation
4145 * @ap: port to suspend
4150 * Kernel thread context (may sleep).
4152 static void ata_eh_handle_port_suspend(struct ata_port
*ap
)
4154 unsigned long flags
;
4156 struct ata_device
*dev
;
4158 /* are we suspending? */
4159 spin_lock_irqsave(ap
->lock
, flags
);
4160 if (!(ap
->pflags
& ATA_PFLAG_PM_PENDING
) ||
4161 ap
->pm_mesg
.event
& PM_EVENT_RESUME
) {
4162 spin_unlock_irqrestore(ap
->lock
, flags
);
4165 spin_unlock_irqrestore(ap
->lock
, flags
);
4167 WARN_ON(ap
->pflags
& ATA_PFLAG_SUSPENDED
);
4170 * If we have a ZPODD attached, check its zero
4171 * power ready status before the port is frozen.
4172 * Only needed for runtime suspend.
4174 if (PMSG_IS_AUTO(ap
->pm_mesg
)) {
4175 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
4176 if (zpodd_dev_enabled(dev
))
4177 zpodd_on_suspend(dev
);
4181 /* tell ACPI we're suspending */
4182 rc
= ata_acpi_on_suspend(ap
);
4187 ata_eh_freeze_port(ap
);
4189 if (ap
->ops
->port_suspend
)
4190 rc
= ap
->ops
->port_suspend(ap
, ap
->pm_mesg
);
4192 ata_acpi_set_state(ap
, ap
->pm_mesg
);
4194 /* update the flags */
4195 spin_lock_irqsave(ap
->lock
, flags
);
4197 ap
->pflags
&= ~ATA_PFLAG_PM_PENDING
;
4199 ap
->pflags
|= ATA_PFLAG_SUSPENDED
;
4200 else if (ap
->pflags
& ATA_PFLAG_FROZEN
)
4201 ata_port_schedule_eh(ap
);
4203 spin_unlock_irqrestore(ap
->lock
, flags
);
4209 * ata_eh_handle_port_resume - perform port resume operation
4210 * @ap: port to resume
4215 * Kernel thread context (may sleep).
4217 static void ata_eh_handle_port_resume(struct ata_port
*ap
)
4219 struct ata_link
*link
;
4220 struct ata_device
*dev
;
4221 unsigned long flags
;
4224 /* are we resuming? */
4225 spin_lock_irqsave(ap
->lock
, flags
);
4226 if (!(ap
->pflags
& ATA_PFLAG_PM_PENDING
) ||
4227 !(ap
->pm_mesg
.event
& PM_EVENT_RESUME
)) {
4228 spin_unlock_irqrestore(ap
->lock
, flags
);
4231 spin_unlock_irqrestore(ap
->lock
, flags
);
4233 WARN_ON(!(ap
->pflags
& ATA_PFLAG_SUSPENDED
));
4236 * Error timestamps are in jiffies which doesn't run while
4237 * suspended and PHY events during resume isn't too uncommon.
4238 * When the two are combined, it can lead to unnecessary speed
4239 * downs if the machine is suspended and resumed repeatedly.
4240 * Clear error history.
4242 ata_for_each_link(link
, ap
, HOST_FIRST
)
4243 ata_for_each_dev(dev
, link
, ALL
)
4244 ata_ering_clear(&dev
->ering
);
4246 ata_acpi_set_state(ap
, ap
->pm_mesg
);
4248 if (ap
->ops
->port_resume
)
4249 rc
= ap
->ops
->port_resume(ap
);
4251 /* tell ACPI that we're resuming */
4252 ata_acpi_on_resume(ap
);
4254 /* update the flags */
4255 spin_lock_irqsave(ap
->lock
, flags
);
4256 ap
->pflags
&= ~(ATA_PFLAG_PM_PENDING
| ATA_PFLAG_SUSPENDED
);
4257 spin_unlock_irqrestore(ap
->lock
, flags
);
4259 #endif /* CONFIG_PM */