1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * libata-eh.c - libata error handling
5 * Maintained by: Tejun Heo <tj@kernel.org>
6 * Please ALWAYS copy linux-ide@vger.kernel.org
9 * Copyright 2006 Tejun Heo <htejun@gmail.com>
11 * libata documentation is available via 'make {ps|pdf}docs',
12 * as Documentation/driver-api/libata.rst
14 * Hardware documentation available from http://www.t13.org/ and
15 * http://www.sata-io.org/
18 #include <linux/kernel.h>
19 #include <linux/blkdev.h>
20 #include <linux/export.h>
21 #include <linux/pci.h>
22 #include <scsi/scsi.h>
23 #include <scsi/scsi_host.h>
24 #include <scsi/scsi_eh.h>
25 #include <scsi/scsi_device.h>
26 #include <scsi/scsi_cmnd.h>
27 #include <scsi/scsi_dbg.h>
28 #include "../scsi/scsi_transport_api.h"
30 #include <linux/libata.h>
32 #include <trace/events/libata.h>
36 /* speed down verdicts */
37 ATA_EH_SPDN_NCQ_OFF
= (1 << 0),
38 ATA_EH_SPDN_SPEED_DOWN
= (1 << 1),
39 ATA_EH_SPDN_FALLBACK_TO_PIO
= (1 << 2),
40 ATA_EH_SPDN_KEEP_ERRORS
= (1 << 3),
43 ATA_EFLAG_IS_IO
= (1 << 0),
44 ATA_EFLAG_DUBIOUS_XFER
= (1 << 1),
45 ATA_EFLAG_OLD_ER
= (1 << 31),
47 /* error categories */
50 ATA_ECAT_TOUT_HSM
= 2,
52 ATA_ECAT_DUBIOUS_NONE
= 4,
53 ATA_ECAT_DUBIOUS_ATA_BUS
= 5,
54 ATA_ECAT_DUBIOUS_TOUT_HSM
= 6,
55 ATA_ECAT_DUBIOUS_UNK_DEV
= 7,
58 ATA_EH_CMD_DFL_TIMEOUT
= 5000,
60 /* always put at least this amount of time between resets */
61 ATA_EH_RESET_COOL_DOWN
= 5000,
63 /* Waiting in ->prereset can never be reliable. It's
64 * sometimes nice to wait there but it can't be depended upon;
65 * otherwise, we wouldn't be resetting. Just give it enough
66 * time for most drives to spin up.
68 ATA_EH_PRERESET_TIMEOUT
= 10000,
69 ATA_EH_FASTDRAIN_INTERVAL
= 3000,
73 /* probe speed down parameters, see ata_eh_schedule_probe() */
74 ATA_EH_PROBE_TRIAL_INTERVAL
= 60000, /* 1 min */
75 ATA_EH_PROBE_TRIALS
= 2,
78 /* The following table determines how we sequence resets. Each entry
79 * represents timeout for that try. The first try can be soft or
80 * hardreset. All others are hardreset if available. In most cases
81 * the first reset w/ 10sec timeout should succeed. Following entries
82 * are mostly for error handling, hotplug and those outlier devices that
83 * take an exceptionally long time to recover from reset.
85 static const unsigned long ata_eh_reset_timeouts
[] = {
86 10000, /* most drives spin up by 10sec */
87 10000, /* > 99% working drives spin up before 20sec */
88 35000, /* give > 30 secs of idleness for outlier devices */
89 5000, /* and sweet one last chance */
90 ULONG_MAX
, /* > 1 min has elapsed, give up */
93 static const unsigned long ata_eh_identify_timeouts
[] = {
94 5000, /* covers > 99% of successes and not too boring on failures */
95 10000, /* combined time till here is enough even for media access */
96 30000, /* for true idiots */
100 static const unsigned long ata_eh_revalidate_timeouts
[] = {
101 15000, /* Some drives are slow to read log pages when waking-up */
102 15000, /* combined time till here is enough even for media access */
106 static const unsigned long ata_eh_flush_timeouts
[] = {
107 15000, /* be generous with flush */
109 30000, /* and even more generous */
113 static const unsigned long ata_eh_other_timeouts
[] = {
114 5000, /* same rationale as identify timeout */
116 /* but no merciful 30sec for other commands, it just isn't worth it */
120 struct ata_eh_cmd_timeout_ent
{
122 const unsigned long *timeouts
;
125 /* The following table determines timeouts to use for EH internal
126 * commands. Each table entry is a command class and matches the
127 * commands the entry applies to and the timeout table to use.
129 * On the retry after a command timed out, the next timeout value from
130 * the table is used. If the table doesn't contain further entries,
131 * the last value is used.
133 * ehc->cmd_timeout_idx keeps track of which timeout to use per
134 * command class, so if SET_FEATURES times out on the first try, the
135 * next try will use the second timeout value only for that class.
137 #define CMDS(cmds...) (const u8 []){ cmds, 0 }
138 static const struct ata_eh_cmd_timeout_ent
139 ata_eh_cmd_timeout_table
[ATA_EH_CMD_TIMEOUT_TABLE_SIZE
] = {
140 { .commands
= CMDS(ATA_CMD_ID_ATA
, ATA_CMD_ID_ATAPI
),
141 .timeouts
= ata_eh_identify_timeouts
, },
142 { .commands
= CMDS(ATA_CMD_READ_LOG_EXT
, ATA_CMD_READ_LOG_DMA_EXT
),
143 .timeouts
= ata_eh_revalidate_timeouts
, },
144 { .commands
= CMDS(ATA_CMD_READ_NATIVE_MAX
, ATA_CMD_READ_NATIVE_MAX_EXT
),
145 .timeouts
= ata_eh_other_timeouts
, },
146 { .commands
= CMDS(ATA_CMD_SET_MAX
, ATA_CMD_SET_MAX_EXT
),
147 .timeouts
= ata_eh_other_timeouts
, },
148 { .commands
= CMDS(ATA_CMD_SET_FEATURES
),
149 .timeouts
= ata_eh_other_timeouts
, },
150 { .commands
= CMDS(ATA_CMD_INIT_DEV_PARAMS
),
151 .timeouts
= ata_eh_other_timeouts
, },
152 { .commands
= CMDS(ATA_CMD_FLUSH
, ATA_CMD_FLUSH_EXT
),
153 .timeouts
= ata_eh_flush_timeouts
},
157 static void __ata_port_freeze(struct ata_port
*ap
);
159 static void ata_eh_handle_port_suspend(struct ata_port
*ap
);
160 static void ata_eh_handle_port_resume(struct ata_port
*ap
);
161 #else /* CONFIG_PM */
162 static void ata_eh_handle_port_suspend(struct ata_port
*ap
)
165 static void ata_eh_handle_port_resume(struct ata_port
*ap
)
167 #endif /* CONFIG_PM */
169 static __printf(2, 0) void __ata_ehi_pushv_desc(struct ata_eh_info
*ehi
,
170 const char *fmt
, va_list args
)
172 ehi
->desc_len
+= vscnprintf(ehi
->desc
+ ehi
->desc_len
,
173 ATA_EH_DESC_LEN
- ehi
->desc_len
,
178 * __ata_ehi_push_desc - push error description without adding separator
180 * @fmt: printf format string
182 * Format string according to @fmt and append it to @ehi->desc.
185 * spin_lock_irqsave(host lock)
187 void __ata_ehi_push_desc(struct ata_eh_info
*ehi
, const char *fmt
, ...)
192 __ata_ehi_pushv_desc(ehi
, fmt
, args
);
197 * ata_ehi_push_desc - push error description with separator
199 * @fmt: printf format string
201 * Format string according to @fmt and append it to @ehi->desc.
202 * If @ehi->desc is not empty, ", " is added in-between.
205 * spin_lock_irqsave(host lock)
207 void ata_ehi_push_desc(struct ata_eh_info
*ehi
, const char *fmt
, ...)
212 __ata_ehi_push_desc(ehi
, ", ");
215 __ata_ehi_pushv_desc(ehi
, fmt
, args
);
220 * ata_ehi_clear_desc - clean error description
226 * spin_lock_irqsave(host lock)
228 void ata_ehi_clear_desc(struct ata_eh_info
*ehi
)
235 * ata_port_desc - append port description
236 * @ap: target ATA port
237 * @fmt: printf format string
239 * Format string according to @fmt and append it to port
240 * description. If port description is not empty, " " is added
241 * in-between. This function is to be used while initializing
242 * ata_host. The description is printed on host registration.
247 void ata_port_desc(struct ata_port
*ap
, const char *fmt
, ...)
251 WARN_ON(!(ap
->pflags
& ATA_PFLAG_INITIALIZING
));
253 if (ap
->link
.eh_info
.desc_len
)
254 __ata_ehi_push_desc(&ap
->link
.eh_info
, " ");
257 __ata_ehi_pushv_desc(&ap
->link
.eh_info
, fmt
, args
);
264 * ata_port_pbar_desc - append PCI BAR description
265 * @ap: target ATA port
266 * @bar: target PCI BAR
267 * @offset: offset into PCI BAR
268 * @name: name of the area
270 * If @offset is negative, this function formats a string which
271 * contains the name, address, size and type of the BAR and
272 * appends it to the port description. If @offset is zero or
273 * positive, only name and offsetted address is appended.
278 void ata_port_pbar_desc(struct ata_port
*ap
, int bar
, ssize_t offset
,
281 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
283 unsigned long long start
, len
;
285 if (pci_resource_flags(pdev
, bar
) & IORESOURCE_MEM
)
287 else if (pci_resource_flags(pdev
, bar
) & IORESOURCE_IO
)
290 start
= (unsigned long long)pci_resource_start(pdev
, bar
);
291 len
= (unsigned long long)pci_resource_len(pdev
, bar
);
294 ata_port_desc(ap
, "%s %s%llu@0x%llx", name
, type
, len
, start
);
296 ata_port_desc(ap
, "%s 0x%llx", name
,
297 start
+ (unsigned long long)offset
);
300 #endif /* CONFIG_PCI */
302 static int ata_lookup_timeout_table(u8 cmd
)
306 for (i
= 0; i
< ATA_EH_CMD_TIMEOUT_TABLE_SIZE
; i
++) {
309 for (cur
= ata_eh_cmd_timeout_table
[i
].commands
; *cur
; cur
++)
318 * ata_internal_cmd_timeout - determine timeout for an internal command
319 * @dev: target device
320 * @cmd: internal command to be issued
322 * Determine timeout for internal command @cmd for @dev.
328 * Determined timeout.
330 unsigned long ata_internal_cmd_timeout(struct ata_device
*dev
, u8 cmd
)
332 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
333 int ent
= ata_lookup_timeout_table(cmd
);
337 return ATA_EH_CMD_DFL_TIMEOUT
;
339 idx
= ehc
->cmd_timeout_idx
[dev
->devno
][ent
];
340 return ata_eh_cmd_timeout_table
[ent
].timeouts
[idx
];
344 * ata_internal_cmd_timed_out - notification for internal command timeout
345 * @dev: target device
346 * @cmd: internal command which timed out
348 * Notify EH that internal command @cmd for @dev timed out. This
349 * function should be called only for commands whose timeouts are
350 * determined using ata_internal_cmd_timeout().
355 void ata_internal_cmd_timed_out(struct ata_device
*dev
, u8 cmd
)
357 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
358 int ent
= ata_lookup_timeout_table(cmd
);
364 idx
= ehc
->cmd_timeout_idx
[dev
->devno
][ent
];
365 if (ata_eh_cmd_timeout_table
[ent
].timeouts
[idx
+ 1] != ULONG_MAX
)
366 ehc
->cmd_timeout_idx
[dev
->devno
][ent
]++;
369 static void ata_ering_record(struct ata_ering
*ering
, unsigned int eflags
,
370 unsigned int err_mask
)
372 struct ata_ering_entry
*ent
;
377 ering
->cursor
%= ATA_ERING_SIZE
;
379 ent
= &ering
->ring
[ering
->cursor
];
380 ent
->eflags
= eflags
;
381 ent
->err_mask
= err_mask
;
382 ent
->timestamp
= get_jiffies_64();
385 static struct ata_ering_entry
*ata_ering_top(struct ata_ering
*ering
)
387 struct ata_ering_entry
*ent
= &ering
->ring
[ering
->cursor
];
394 int ata_ering_map(struct ata_ering
*ering
,
395 int (*map_fn
)(struct ata_ering_entry
*, void *),
399 struct ata_ering_entry
*ent
;
403 ent
= &ering
->ring
[idx
];
406 rc
= map_fn(ent
, arg
);
409 idx
= (idx
- 1 + ATA_ERING_SIZE
) % ATA_ERING_SIZE
;
410 } while (idx
!= ering
->cursor
);
415 static int ata_ering_clear_cb(struct ata_ering_entry
*ent
, void *void_arg
)
417 ent
->eflags
|= ATA_EFLAG_OLD_ER
;
421 static void ata_ering_clear(struct ata_ering
*ering
)
423 ata_ering_map(ering
, ata_ering_clear_cb
, NULL
);
426 static unsigned int ata_eh_dev_action(struct ata_device
*dev
)
428 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
430 return ehc
->i
.action
| ehc
->i
.dev_action
[dev
->devno
];
433 static void ata_eh_clear_action(struct ata_link
*link
, struct ata_device
*dev
,
434 struct ata_eh_info
*ehi
, unsigned int action
)
436 struct ata_device
*tdev
;
439 ehi
->action
&= ~action
;
440 ata_for_each_dev(tdev
, link
, ALL
)
441 ehi
->dev_action
[tdev
->devno
] &= ~action
;
443 /* doesn't make sense for port-wide EH actions */
444 WARN_ON(!(action
& ATA_EH_PERDEV_MASK
));
446 /* break ehi->action into ehi->dev_action */
447 if (ehi
->action
& action
) {
448 ata_for_each_dev(tdev
, link
, ALL
)
449 ehi
->dev_action
[tdev
->devno
] |=
450 ehi
->action
& action
;
451 ehi
->action
&= ~action
;
454 /* turn off the specified per-dev action */
455 ehi
->dev_action
[dev
->devno
] &= ~action
;
460 * ata_eh_acquire - acquire EH ownership
461 * @ap: ATA port to acquire EH ownership for
463 * Acquire EH ownership for @ap. This is the basic exclusion
464 * mechanism for ports sharing a host. Only one port hanging off
465 * the same host can claim the ownership of EH.
470 void ata_eh_acquire(struct ata_port
*ap
)
472 mutex_lock(&ap
->host
->eh_mutex
);
473 WARN_ON_ONCE(ap
->host
->eh_owner
);
474 ap
->host
->eh_owner
= current
;
478 * ata_eh_release - release EH ownership
479 * @ap: ATA port to release EH ownership for
481 * Release EH ownership for @ap if the caller. The caller must
482 * have acquired EH ownership using ata_eh_acquire() previously.
487 void ata_eh_release(struct ata_port
*ap
)
489 WARN_ON_ONCE(ap
->host
->eh_owner
!= current
);
490 ap
->host
->eh_owner
= NULL
;
491 mutex_unlock(&ap
->host
->eh_mutex
);
494 static void ata_eh_unload(struct ata_port
*ap
)
496 struct ata_link
*link
;
497 struct ata_device
*dev
;
500 /* Restore SControl IPM and SPD for the next driver and
501 * disable attached devices.
503 ata_for_each_link(link
, ap
, PMP_FIRST
) {
504 sata_scr_write(link
, SCR_CONTROL
, link
->saved_scontrol
& 0xff0);
505 ata_for_each_dev(dev
, link
, ALL
)
506 ata_dev_disable(dev
);
509 /* freeze and set UNLOADED */
510 spin_lock_irqsave(ap
->lock
, flags
);
512 ata_port_freeze(ap
); /* won't be thawed */
513 ap
->pflags
&= ~ATA_PFLAG_EH_PENDING
; /* clear pending from freeze */
514 ap
->pflags
|= ATA_PFLAG_UNLOADED
;
516 spin_unlock_irqrestore(ap
->lock
, flags
);
520 * ata_scsi_error - SCSI layer error handler callback
521 * @host: SCSI host on which error occurred
523 * Handles SCSI-layer-thrown error events.
526 * Inherited from SCSI layer (none, can sleep)
531 void ata_scsi_error(struct Scsi_Host
*host
)
533 struct ata_port
*ap
= ata_shost_to_port(host
);
535 LIST_HEAD(eh_work_q
);
539 spin_lock_irqsave(host
->host_lock
, flags
);
540 list_splice_init(&host
->eh_cmd_q
, &eh_work_q
);
541 spin_unlock_irqrestore(host
->host_lock
, flags
);
543 ata_scsi_cmd_error_handler(host
, ap
, &eh_work_q
);
545 /* If we timed raced normal completion and there is nothing to
546 recover nr_timedout == 0 why exactly are we doing error recovery ? */
547 ata_scsi_port_error_handler(host
, ap
);
549 /* finish or retry handled scmd's and clean up */
550 WARN_ON(!list_empty(&eh_work_q
));
556 * ata_scsi_cmd_error_handler - error callback for a list of commands
557 * @host: scsi host containing the port
558 * @ap: ATA port within the host
559 * @eh_work_q: list of commands to process
561 * process the given list of commands and return those finished to the
562 * ap->eh_done_q. This function is the first part of the libata error
563 * handler which processes a given list of failed commands.
565 void ata_scsi_cmd_error_handler(struct Scsi_Host
*host
, struct ata_port
*ap
,
566 struct list_head
*eh_work_q
)
571 /* make sure sff pio task is not running */
572 ata_sff_flush_pio_task(ap
);
574 /* synchronize with host lock and sort out timeouts */
576 /* For new EH, all qcs are finished in one of three ways -
577 * normal completion, error completion, and SCSI timeout.
578 * Both completions can race against SCSI timeout. When normal
579 * completion wins, the qc never reaches EH. When error
580 * completion wins, the qc has ATA_QCFLAG_FAILED set.
582 * When SCSI timeout wins, things are a bit more complex.
583 * Normal or error completion can occur after the timeout but
584 * before this point. In such cases, both types of
585 * completions are honored. A scmd is determined to have
586 * timed out iff its associated qc is active and not failed.
588 spin_lock_irqsave(ap
->lock
, flags
);
589 if (ap
->ops
->error_handler
) {
590 struct scsi_cmnd
*scmd
, *tmp
;
593 /* This must occur under the ap->lock as we don't want
594 a polled recovery to race the real interrupt handler
596 The lost_interrupt handler checks for any completed but
597 non-notified command and completes much like an IRQ handler.
599 We then fall into the error recovery code which will treat
600 this as if normal completion won the race */
602 if (ap
->ops
->lost_interrupt
)
603 ap
->ops
->lost_interrupt(ap
);
605 list_for_each_entry_safe(scmd
, tmp
, eh_work_q
, eh_entry
) {
606 struct ata_queued_cmd
*qc
;
608 ata_qc_for_each_raw(ap
, qc
, i
) {
609 if (qc
->flags
& ATA_QCFLAG_ACTIVE
&&
614 if (i
< ATA_MAX_QUEUE
) {
615 /* the scmd has an associated qc */
616 if (!(qc
->flags
& ATA_QCFLAG_FAILED
)) {
617 /* which hasn't failed yet, timeout */
618 qc
->err_mask
|= AC_ERR_TIMEOUT
;
619 qc
->flags
|= ATA_QCFLAG_FAILED
;
623 /* Normal completion occurred after
624 * SCSI timeout but before this point.
625 * Successfully complete it.
627 scmd
->retries
= scmd
->allowed
;
628 scsi_eh_finish_cmd(scmd
, &ap
->eh_done_q
);
632 /* If we have timed out qcs. They belong to EH from
633 * this point but the state of the controller is
634 * unknown. Freeze the port to make sure the IRQ
635 * handler doesn't diddle with those qcs. This must
636 * be done atomically w.r.t. setting QCFLAG_FAILED.
639 __ata_port_freeze(ap
);
642 /* initialize eh_tries */
643 ap
->eh_tries
= ATA_EH_MAX_TRIES
;
645 spin_unlock_irqrestore(ap
->lock
, flags
);
648 EXPORT_SYMBOL(ata_scsi_cmd_error_handler
);
651 * ata_scsi_port_error_handler - recover the port after the commands
652 * @host: SCSI host containing the port
655 * Handle the recovery of the port @ap after all the commands
656 * have been recovered.
658 void ata_scsi_port_error_handler(struct Scsi_Host
*host
, struct ata_port
*ap
)
662 /* invoke error handler */
663 if (ap
->ops
->error_handler
) {
664 struct ata_link
*link
;
666 /* acquire EH ownership */
669 /* kill fast drain timer */
670 del_timer_sync(&ap
->fastdrain_timer
);
672 /* process port resume request */
673 ata_eh_handle_port_resume(ap
);
675 /* fetch & clear EH info */
676 spin_lock_irqsave(ap
->lock
, flags
);
678 ata_for_each_link(link
, ap
, HOST_FIRST
) {
679 struct ata_eh_context
*ehc
= &link
->eh_context
;
680 struct ata_device
*dev
;
682 memset(&link
->eh_context
, 0, sizeof(link
->eh_context
));
683 link
->eh_context
.i
= link
->eh_info
;
684 memset(&link
->eh_info
, 0, sizeof(link
->eh_info
));
686 ata_for_each_dev(dev
, link
, ENABLED
) {
687 int devno
= dev
->devno
;
689 ehc
->saved_xfer_mode
[devno
] = dev
->xfer_mode
;
690 if (ata_ncq_enabled(dev
))
691 ehc
->saved_ncq_enabled
|= 1 << devno
;
695 ap
->pflags
|= ATA_PFLAG_EH_IN_PROGRESS
;
696 ap
->pflags
&= ~ATA_PFLAG_EH_PENDING
;
697 ap
->excl_link
= NULL
; /* don't maintain exclusion over EH */
699 spin_unlock_irqrestore(ap
->lock
, flags
);
701 /* invoke EH, skip if unloading or suspended */
702 if (!(ap
->pflags
& (ATA_PFLAG_UNLOADING
| ATA_PFLAG_SUSPENDED
)))
703 ap
->ops
->error_handler(ap
);
705 /* if unloading, commence suicide */
706 if ((ap
->pflags
& ATA_PFLAG_UNLOADING
) &&
707 !(ap
->pflags
& ATA_PFLAG_UNLOADED
))
712 /* process port suspend request */
713 ata_eh_handle_port_suspend(ap
);
715 /* Exception might have happened after ->error_handler
716 * recovered the port but before this point. Repeat
719 spin_lock_irqsave(ap
->lock
, flags
);
721 if (ap
->pflags
& ATA_PFLAG_EH_PENDING
) {
722 if (--ap
->eh_tries
) {
723 spin_unlock_irqrestore(ap
->lock
, flags
);
727 "EH pending after %d tries, giving up\n",
729 ap
->pflags
&= ~ATA_PFLAG_EH_PENDING
;
732 /* this run is complete, make sure EH info is clear */
733 ata_for_each_link(link
, ap
, HOST_FIRST
)
734 memset(&link
->eh_info
, 0, sizeof(link
->eh_info
));
736 /* end eh (clear host_eh_scheduled) while holding
737 * ap->lock such that if exception occurs after this
738 * point but before EH completion, SCSI midlayer will
743 spin_unlock_irqrestore(ap
->lock
, flags
);
746 WARN_ON(ata_qc_from_tag(ap
, ap
->link
.active_tag
) == NULL
);
747 ap
->ops
->eng_timeout(ap
);
750 scsi_eh_flush_done_q(&ap
->eh_done_q
);
753 spin_lock_irqsave(ap
->lock
, flags
);
755 if (ap
->pflags
& ATA_PFLAG_LOADING
)
756 ap
->pflags
&= ~ATA_PFLAG_LOADING
;
757 else if ((ap
->pflags
& ATA_PFLAG_SCSI_HOTPLUG
) &&
758 !(ap
->flags
& ATA_FLAG_SAS_HOST
))
759 schedule_delayed_work(&ap
->hotplug_task
, 0);
761 if (ap
->pflags
& ATA_PFLAG_RECOVERED
)
762 ata_port_info(ap
, "EH complete\n");
764 ap
->pflags
&= ~(ATA_PFLAG_SCSI_HOTPLUG
| ATA_PFLAG_RECOVERED
);
766 /* tell wait_eh that we're done */
767 ap
->pflags
&= ~ATA_PFLAG_EH_IN_PROGRESS
;
768 wake_up_all(&ap
->eh_wait_q
);
770 spin_unlock_irqrestore(ap
->lock
, flags
);
772 EXPORT_SYMBOL_GPL(ata_scsi_port_error_handler
);
775 * ata_port_wait_eh - Wait for the currently pending EH to complete
776 * @ap: Port to wait EH for
778 * Wait until the currently pending EH is complete.
781 * Kernel thread context (may sleep).
783 void ata_port_wait_eh(struct ata_port
*ap
)
789 spin_lock_irqsave(ap
->lock
, flags
);
791 while (ap
->pflags
& (ATA_PFLAG_EH_PENDING
| ATA_PFLAG_EH_IN_PROGRESS
)) {
792 prepare_to_wait(&ap
->eh_wait_q
, &wait
, TASK_UNINTERRUPTIBLE
);
793 spin_unlock_irqrestore(ap
->lock
, flags
);
795 spin_lock_irqsave(ap
->lock
, flags
);
797 finish_wait(&ap
->eh_wait_q
, &wait
);
799 spin_unlock_irqrestore(ap
->lock
, flags
);
801 /* make sure SCSI EH is complete */
802 if (scsi_host_in_recovery(ap
->scsi_host
)) {
807 EXPORT_SYMBOL_GPL(ata_port_wait_eh
);
809 static int ata_eh_nr_in_flight(struct ata_port
*ap
)
811 struct ata_queued_cmd
*qc
;
815 /* count only non-internal commands */
816 ata_qc_for_each(ap
, qc
, tag
) {
824 void ata_eh_fastdrain_timerfn(struct timer_list
*t
)
826 struct ata_port
*ap
= from_timer(ap
, t
, fastdrain_timer
);
830 spin_lock_irqsave(ap
->lock
, flags
);
832 cnt
= ata_eh_nr_in_flight(ap
);
838 if (cnt
== ap
->fastdrain_cnt
) {
839 struct ata_queued_cmd
*qc
;
842 /* No progress during the last interval, tag all
843 * in-flight qcs as timed out and freeze the port.
845 ata_qc_for_each(ap
, qc
, tag
) {
847 qc
->err_mask
|= AC_ERR_TIMEOUT
;
852 /* some qcs have finished, give it another chance */
853 ap
->fastdrain_cnt
= cnt
;
854 ap
->fastdrain_timer
.expires
=
855 ata_deadline(jiffies
, ATA_EH_FASTDRAIN_INTERVAL
);
856 add_timer(&ap
->fastdrain_timer
);
860 spin_unlock_irqrestore(ap
->lock
, flags
);
864 * ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain
865 * @ap: target ATA port
866 * @fastdrain: activate fast drain
868 * Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain
869 * is non-zero and EH wasn't pending before. Fast drain ensures
870 * that EH kicks in in timely manner.
873 * spin_lock_irqsave(host lock)
875 static void ata_eh_set_pending(struct ata_port
*ap
, int fastdrain
)
879 /* already scheduled? */
880 if (ap
->pflags
& ATA_PFLAG_EH_PENDING
)
883 ap
->pflags
|= ATA_PFLAG_EH_PENDING
;
888 /* do we have in-flight qcs? */
889 cnt
= ata_eh_nr_in_flight(ap
);
893 /* activate fast drain */
894 ap
->fastdrain_cnt
= cnt
;
895 ap
->fastdrain_timer
.expires
=
896 ata_deadline(jiffies
, ATA_EH_FASTDRAIN_INTERVAL
);
897 add_timer(&ap
->fastdrain_timer
);
901 * ata_qc_schedule_eh - schedule qc for error handling
902 * @qc: command to schedule error handling for
904 * Schedule error handling for @qc. EH will kick in as soon as
905 * other commands are drained.
908 * spin_lock_irqsave(host lock)
910 void ata_qc_schedule_eh(struct ata_queued_cmd
*qc
)
912 struct ata_port
*ap
= qc
->ap
;
914 WARN_ON(!ap
->ops
->error_handler
);
916 qc
->flags
|= ATA_QCFLAG_FAILED
;
917 ata_eh_set_pending(ap
, 1);
919 /* The following will fail if timeout has already expired.
920 * ata_scsi_error() takes care of such scmds on EH entry.
921 * Note that ATA_QCFLAG_FAILED is unconditionally set after
922 * this function completes.
924 blk_abort_request(qc
->scsicmd
->request
);
928 * ata_std_sched_eh - non-libsas ata_ports issue eh with this common routine
929 * @ap: ATA port to schedule EH for
931 * LOCKING: inherited from ata_port_schedule_eh
932 * spin_lock_irqsave(host lock)
934 void ata_std_sched_eh(struct ata_port
*ap
)
936 WARN_ON(!ap
->ops
->error_handler
);
938 if (ap
->pflags
& ATA_PFLAG_INITIALIZING
)
941 ata_eh_set_pending(ap
, 1);
942 scsi_schedule_eh(ap
->scsi_host
);
944 DPRINTK("port EH scheduled\n");
946 EXPORT_SYMBOL_GPL(ata_std_sched_eh
);
949 * ata_std_end_eh - non-libsas ata_ports complete eh with this common routine
950 * @ap: ATA port to end EH for
952 * In the libata object model there is a 1:1 mapping of ata_port to
953 * shost, so host fields can be directly manipulated under ap->lock, in
954 * the libsas case we need to hold a lock at the ha->level to coordinate
958 * spin_lock_irqsave(host lock)
960 void ata_std_end_eh(struct ata_port
*ap
)
962 struct Scsi_Host
*host
= ap
->scsi_host
;
964 host
->host_eh_scheduled
= 0;
966 EXPORT_SYMBOL(ata_std_end_eh
);
970 * ata_port_schedule_eh - schedule error handling without a qc
971 * @ap: ATA port to schedule EH for
973 * Schedule error handling for @ap. EH will kick in as soon as
974 * all commands are drained.
977 * spin_lock_irqsave(host lock)
979 void ata_port_schedule_eh(struct ata_port
*ap
)
981 /* see: ata_std_sched_eh, unless you know better */
982 ap
->ops
->sched_eh(ap
);
985 static int ata_do_link_abort(struct ata_port
*ap
, struct ata_link
*link
)
987 struct ata_queued_cmd
*qc
;
988 int tag
, nr_aborted
= 0;
990 WARN_ON(!ap
->ops
->error_handler
);
992 /* we're gonna abort all commands, no need for fast drain */
993 ata_eh_set_pending(ap
, 0);
995 /* include internal tag in iteration */
996 ata_qc_for_each_with_internal(ap
, qc
, tag
) {
997 if (qc
&& (!link
|| qc
->dev
->link
== link
)) {
998 qc
->flags
|= ATA_QCFLAG_FAILED
;
1005 ata_port_schedule_eh(ap
);
1011 * ata_link_abort - abort all qc's on the link
1012 * @link: ATA link to abort qc's for
1014 * Abort all active qc's active on @link and schedule EH.
1017 * spin_lock_irqsave(host lock)
1020 * Number of aborted qc's.
1022 int ata_link_abort(struct ata_link
*link
)
1024 return ata_do_link_abort(link
->ap
, link
);
1028 * ata_port_abort - abort all qc's on the port
1029 * @ap: ATA port to abort qc's for
1031 * Abort all active qc's of @ap and schedule EH.
1034 * spin_lock_irqsave(host_set lock)
1037 * Number of aborted qc's.
1039 int ata_port_abort(struct ata_port
*ap
)
1041 return ata_do_link_abort(ap
, NULL
);
1045 * __ata_port_freeze - freeze port
1046 * @ap: ATA port to freeze
1048 * This function is called when HSM violation or some other
1049 * condition disrupts normal operation of the port. Frozen port
1050 * is not allowed to perform any operation until the port is
1051 * thawed, which usually follows a successful reset.
1053 * ap->ops->freeze() callback can be used for freezing the port
1054 * hardware-wise (e.g. mask interrupt and stop DMA engine). If a
1055 * port cannot be frozen hardware-wise, the interrupt handler
1056 * must ack and clear interrupts unconditionally while the port
1060 * spin_lock_irqsave(host lock)
1062 static void __ata_port_freeze(struct ata_port
*ap
)
1064 WARN_ON(!ap
->ops
->error_handler
);
1066 if (ap
->ops
->freeze
)
1067 ap
->ops
->freeze(ap
);
1069 ap
->pflags
|= ATA_PFLAG_FROZEN
;
1071 DPRINTK("ata%u port frozen\n", ap
->print_id
);
1075 * ata_port_freeze - abort & freeze port
1076 * @ap: ATA port to freeze
1078 * Abort and freeze @ap. The freeze operation must be called
1079 * first, because some hardware requires special operations
1080 * before the taskfile registers are accessible.
1083 * spin_lock_irqsave(host lock)
1086 * Number of aborted commands.
1088 int ata_port_freeze(struct ata_port
*ap
)
1092 WARN_ON(!ap
->ops
->error_handler
);
1094 __ata_port_freeze(ap
);
1095 nr_aborted
= ata_port_abort(ap
);
1101 * sata_async_notification - SATA async notification handler
1102 * @ap: ATA port where async notification is received
1104 * Handler to be called when async notification via SDB FIS is
1105 * received. This function schedules EH if necessary.
1108 * spin_lock_irqsave(host lock)
1111 * 1 if EH is scheduled, 0 otherwise.
1113 int sata_async_notification(struct ata_port
*ap
)
1118 if (!(ap
->flags
& ATA_FLAG_AN
))
1121 rc
= sata_scr_read(&ap
->link
, SCR_NOTIFICATION
, &sntf
);
1123 sata_scr_write(&ap
->link
, SCR_NOTIFICATION
, sntf
);
1125 if (!sata_pmp_attached(ap
) || rc
) {
1126 /* PMP is not attached or SNTF is not available */
1127 if (!sata_pmp_attached(ap
)) {
1128 /* PMP is not attached. Check whether ATAPI
1129 * AN is configured. If so, notify media
1132 struct ata_device
*dev
= ap
->link
.device
;
1134 if ((dev
->class == ATA_DEV_ATAPI
) &&
1135 (dev
->flags
& ATA_DFLAG_AN
))
1136 ata_scsi_media_change_notify(dev
);
1139 /* PMP is attached but SNTF is not available.
1140 * ATAPI async media change notification is
1141 * not used. The PMP must be reporting PHY
1142 * status change, schedule EH.
1144 ata_port_schedule_eh(ap
);
1148 /* PMP is attached and SNTF is available */
1149 struct ata_link
*link
;
1151 /* check and notify ATAPI AN */
1152 ata_for_each_link(link
, ap
, EDGE
) {
1153 if (!(sntf
& (1 << link
->pmp
)))
1156 if ((link
->device
->class == ATA_DEV_ATAPI
) &&
1157 (link
->device
->flags
& ATA_DFLAG_AN
))
1158 ata_scsi_media_change_notify(link
->device
);
1161 /* If PMP is reporting that PHY status of some
1162 * downstream ports has changed, schedule EH.
1164 if (sntf
& (1 << SATA_PMP_CTRL_PORT
)) {
1165 ata_port_schedule_eh(ap
);
1174 * ata_eh_freeze_port - EH helper to freeze port
1175 * @ap: ATA port to freeze
1182 void ata_eh_freeze_port(struct ata_port
*ap
)
1184 unsigned long flags
;
1186 if (!ap
->ops
->error_handler
)
1189 spin_lock_irqsave(ap
->lock
, flags
);
1190 __ata_port_freeze(ap
);
1191 spin_unlock_irqrestore(ap
->lock
, flags
);
1195 * ata_port_thaw_port - EH helper to thaw port
1196 * @ap: ATA port to thaw
1198 * Thaw frozen port @ap.
1203 void ata_eh_thaw_port(struct ata_port
*ap
)
1205 unsigned long flags
;
1207 if (!ap
->ops
->error_handler
)
1210 spin_lock_irqsave(ap
->lock
, flags
);
1212 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
1217 spin_unlock_irqrestore(ap
->lock
, flags
);
1219 DPRINTK("ata%u port thawed\n", ap
->print_id
);
1222 static void ata_eh_scsidone(struct scsi_cmnd
*scmd
)
1227 static void __ata_eh_qc_complete(struct ata_queued_cmd
*qc
)
1229 struct ata_port
*ap
= qc
->ap
;
1230 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1231 unsigned long flags
;
1233 spin_lock_irqsave(ap
->lock
, flags
);
1234 qc
->scsidone
= ata_eh_scsidone
;
1235 __ata_qc_complete(qc
);
1236 WARN_ON(ata_tag_valid(qc
->tag
));
1237 spin_unlock_irqrestore(ap
->lock
, flags
);
1239 scsi_eh_finish_cmd(scmd
, &ap
->eh_done_q
);
1243 * ata_eh_qc_complete - Complete an active ATA command from EH
1244 * @qc: Command to complete
1246 * Indicate to the mid and upper layers that an ATA command has
1247 * completed. To be used from EH.
1249 void ata_eh_qc_complete(struct ata_queued_cmd
*qc
)
1251 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1252 scmd
->retries
= scmd
->allowed
;
1253 __ata_eh_qc_complete(qc
);
1257 * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH
1258 * @qc: Command to retry
1260 * Indicate to the mid and upper layers that an ATA command
1261 * should be retried. To be used from EH.
1263 * SCSI midlayer limits the number of retries to scmd->allowed.
1264 * scmd->allowed is incremented for commands which get retried
1265 * due to unrelated failures (qc->err_mask is zero).
1267 void ata_eh_qc_retry(struct ata_queued_cmd
*qc
)
1269 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1272 __ata_eh_qc_complete(qc
);
1276 * ata_dev_disable - disable ATA device
1277 * @dev: ATA device to disable
1284 void ata_dev_disable(struct ata_device
*dev
)
1286 if (!ata_dev_enabled(dev
))
1289 if (ata_msg_drv(dev
->link
->ap
))
1290 ata_dev_warn(dev
, "disabled\n");
1291 ata_acpi_on_disable(dev
);
1292 ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO0
| ATA_DNXFER_QUIET
);
1295 /* From now till the next successful probe, ering is used to
1296 * track probe failures. Clear accumulated device error info.
1298 ata_ering_clear(&dev
->ering
);
1302 * ata_eh_detach_dev - detach ATA device
1303 * @dev: ATA device to detach
1310 void ata_eh_detach_dev(struct ata_device
*dev
)
1312 struct ata_link
*link
= dev
->link
;
1313 struct ata_port
*ap
= link
->ap
;
1314 struct ata_eh_context
*ehc
= &link
->eh_context
;
1315 unsigned long flags
;
1317 ata_dev_disable(dev
);
1319 spin_lock_irqsave(ap
->lock
, flags
);
1321 dev
->flags
&= ~ATA_DFLAG_DETACH
;
1323 if (ata_scsi_offline_dev(dev
)) {
1324 dev
->flags
|= ATA_DFLAG_DETACHED
;
1325 ap
->pflags
|= ATA_PFLAG_SCSI_HOTPLUG
;
1328 /* clear per-dev EH info */
1329 ata_eh_clear_action(link
, dev
, &link
->eh_info
, ATA_EH_PERDEV_MASK
);
1330 ata_eh_clear_action(link
, dev
, &link
->eh_context
.i
, ATA_EH_PERDEV_MASK
);
1331 ehc
->saved_xfer_mode
[dev
->devno
] = 0;
1332 ehc
->saved_ncq_enabled
&= ~(1 << dev
->devno
);
1334 spin_unlock_irqrestore(ap
->lock
, flags
);
1338 * ata_eh_about_to_do - about to perform eh_action
1339 * @link: target ATA link
1340 * @dev: target ATA dev for per-dev action (can be NULL)
1341 * @action: action about to be performed
1343 * Called just before performing EH actions to clear related bits
1344 * in @link->eh_info such that eh actions are not unnecessarily
1350 void ata_eh_about_to_do(struct ata_link
*link
, struct ata_device
*dev
,
1351 unsigned int action
)
1353 struct ata_port
*ap
= link
->ap
;
1354 struct ata_eh_info
*ehi
= &link
->eh_info
;
1355 struct ata_eh_context
*ehc
= &link
->eh_context
;
1356 unsigned long flags
;
1358 spin_lock_irqsave(ap
->lock
, flags
);
1360 ata_eh_clear_action(link
, dev
, ehi
, action
);
1362 /* About to take EH action, set RECOVERED. Ignore actions on
1363 * slave links as master will do them again.
1365 if (!(ehc
->i
.flags
& ATA_EHI_QUIET
) && link
!= ap
->slave_link
)
1366 ap
->pflags
|= ATA_PFLAG_RECOVERED
;
1368 spin_unlock_irqrestore(ap
->lock
, flags
);
1372 * ata_eh_done - EH action complete
1373 * @link: ATA link for which EH actions are complete
1374 * @dev: target ATA dev for per-dev action (can be NULL)
1375 * @action: action just completed
1377 * Called right after performing EH actions to clear related bits
1378 * in @link->eh_context.
1383 void ata_eh_done(struct ata_link
*link
, struct ata_device
*dev
,
1384 unsigned int action
)
1386 struct ata_eh_context
*ehc
= &link
->eh_context
;
1388 ata_eh_clear_action(link
, dev
, &ehc
->i
, action
);
1392 * ata_err_string - convert err_mask to descriptive string
1393 * @err_mask: error mask to convert to string
1395 * Convert @err_mask to descriptive string. Errors are
1396 * prioritized according to severity and only the most severe
1397 * error is reported.
1403 * Descriptive string for @err_mask
1405 static const char *ata_err_string(unsigned int err_mask
)
1407 if (err_mask
& AC_ERR_HOST_BUS
)
1408 return "host bus error";
1409 if (err_mask
& AC_ERR_ATA_BUS
)
1410 return "ATA bus error";
1411 if (err_mask
& AC_ERR_TIMEOUT
)
1413 if (err_mask
& AC_ERR_HSM
)
1414 return "HSM violation";
1415 if (err_mask
& AC_ERR_SYSTEM
)
1416 return "internal error";
1417 if (err_mask
& AC_ERR_MEDIA
)
1418 return "media error";
1419 if (err_mask
& AC_ERR_INVALID
)
1420 return "invalid argument";
1421 if (err_mask
& AC_ERR_DEV
)
1422 return "device error";
1423 if (err_mask
& AC_ERR_NCQ
)
1425 if (err_mask
& AC_ERR_NODEV_HINT
)
1426 return "Polling detection error";
1427 return "unknown error";
1431 * ata_eh_read_log_10h - Read log page 10h for NCQ error details
1432 * @dev: Device to read log page 10h from
1433 * @tag: Resulting tag of the failed command
1434 * @tf: Resulting taskfile registers of the failed command
1436 * Read log page 10h to obtain NCQ error details and clear error
1440 * Kernel thread context (may sleep).
1443 * 0 on success, -errno otherwise.
1445 static int ata_eh_read_log_10h(struct ata_device
*dev
,
1446 int *tag
, struct ata_taskfile
*tf
)
1448 u8
*buf
= dev
->link
->ap
->sector_buf
;
1449 unsigned int err_mask
;
1453 err_mask
= ata_read_log_page(dev
, ATA_LOG_SATA_NCQ
, 0, buf
, 1);
1458 for (i
= 0; i
< ATA_SECT_SIZE
; i
++)
1461 ata_dev_warn(dev
, "invalid checksum 0x%x on log page 10h\n",
1467 *tag
= buf
[0] & 0x1f;
1469 tf
->command
= buf
[2];
1470 tf
->feature
= buf
[3];
1474 tf
->device
= buf
[7];
1475 tf
->hob_lbal
= buf
[8];
1476 tf
->hob_lbam
= buf
[9];
1477 tf
->hob_lbah
= buf
[10];
1478 tf
->nsect
= buf
[12];
1479 tf
->hob_nsect
= buf
[13];
1480 if (dev
->class == ATA_DEV_ZAC
&& ata_id_has_ncq_autosense(dev
->id
))
1481 tf
->auxiliary
= buf
[14] << 16 | buf
[15] << 8 | buf
[16];
1487 * atapi_eh_tur - perform ATAPI TEST_UNIT_READY
1488 * @dev: target ATAPI device
1489 * @r_sense_key: out parameter for sense_key
1491 * Perform ATAPI TEST_UNIT_READY.
1494 * EH context (may sleep).
1497 * 0 on success, AC_ERR_* mask on failure.
1499 unsigned int atapi_eh_tur(struct ata_device
*dev
, u8
*r_sense_key
)
1501 u8 cdb
[ATAPI_CDB_LEN
] = { TEST_UNIT_READY
, 0, 0, 0, 0, 0 };
1502 struct ata_taskfile tf
;
1503 unsigned int err_mask
;
1505 ata_tf_init(dev
, &tf
);
1507 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1508 tf
.command
= ATA_CMD_PACKET
;
1509 tf
.protocol
= ATAPI_PROT_NODATA
;
1511 err_mask
= ata_exec_internal(dev
, &tf
, cdb
, DMA_NONE
, NULL
, 0, 0);
1512 if (err_mask
== AC_ERR_DEV
)
1513 *r_sense_key
= tf
.feature
>> 4;
1518 * ata_eh_request_sense - perform REQUEST_SENSE_DATA_EXT
1519 * @qc: qc to perform REQUEST_SENSE_SENSE_DATA_EXT to
1520 * @cmd: scsi command for which the sense code should be set
1522 * Perform REQUEST_SENSE_DATA_EXT after the device reported CHECK
1523 * SENSE. This function is an EH helper.
1526 * Kernel thread context (may sleep).
1528 static void ata_eh_request_sense(struct ata_queued_cmd
*qc
,
1529 struct scsi_cmnd
*cmd
)
1531 struct ata_device
*dev
= qc
->dev
;
1532 struct ata_taskfile tf
;
1533 unsigned int err_mask
;
1535 if (qc
->ap
->pflags
& ATA_PFLAG_FROZEN
) {
1536 ata_dev_warn(dev
, "sense data available but port frozen\n");
1540 if (!cmd
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
)
1543 if (!ata_id_sense_reporting_enabled(dev
->id
)) {
1544 ata_dev_warn(qc
->dev
, "sense data reporting disabled\n");
1548 DPRINTK("ATA request sense\n");
1550 ata_tf_init(dev
, &tf
);
1551 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1552 tf
.flags
|= ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
1553 tf
.command
= ATA_CMD_REQ_SENSE_DATA
;
1554 tf
.protocol
= ATA_PROT_NODATA
;
1556 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
1557 /* Ignore err_mask; ATA_ERR might be set */
1558 if (tf
.command
& ATA_SENSE
) {
1559 ata_scsi_set_sense(dev
, cmd
, tf
.lbah
, tf
.lbam
, tf
.lbal
);
1560 qc
->flags
|= ATA_QCFLAG_SENSE_VALID
;
1562 ata_dev_warn(dev
, "request sense failed stat %02x emask %x\n",
1563 tf
.command
, err_mask
);
1568 * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE
1569 * @dev: device to perform REQUEST_SENSE to
1570 * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long)
1571 * @dfl_sense_key: default sense key to use
1573 * Perform ATAPI REQUEST_SENSE after the device reported CHECK
1574 * SENSE. This function is EH helper.
1577 * Kernel thread context (may sleep).
1580 * 0 on success, AC_ERR_* mask on failure
1582 unsigned int atapi_eh_request_sense(struct ata_device
*dev
,
1583 u8
*sense_buf
, u8 dfl_sense_key
)
1585 u8 cdb
[ATAPI_CDB_LEN
] =
1586 { REQUEST_SENSE
, 0, 0, 0, SCSI_SENSE_BUFFERSIZE
, 0 };
1587 struct ata_port
*ap
= dev
->link
->ap
;
1588 struct ata_taskfile tf
;
1590 DPRINTK("ATAPI request sense\n");
1592 memset(sense_buf
, 0, SCSI_SENSE_BUFFERSIZE
);
1594 /* initialize sense_buf with the error register,
1595 * for the case where they are -not- overwritten
1597 sense_buf
[0] = 0x70;
1598 sense_buf
[2] = dfl_sense_key
;
1600 /* some devices time out if garbage left in tf */
1601 ata_tf_init(dev
, &tf
);
1603 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1604 tf
.command
= ATA_CMD_PACKET
;
1606 /* is it pointless to prefer PIO for "safety reasons"? */
1607 if (ap
->flags
& ATA_FLAG_PIO_DMA
) {
1608 tf
.protocol
= ATAPI_PROT_DMA
;
1609 tf
.feature
|= ATAPI_PKT_DMA
;
1611 tf
.protocol
= ATAPI_PROT_PIO
;
1612 tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
1616 return ata_exec_internal(dev
, &tf
, cdb
, DMA_FROM_DEVICE
,
1617 sense_buf
, SCSI_SENSE_BUFFERSIZE
, 0);
1621 * ata_eh_analyze_serror - analyze SError for a failed port
1622 * @link: ATA link to analyze SError for
1624 * Analyze SError if available and further determine cause of
1630 static void ata_eh_analyze_serror(struct ata_link
*link
)
1632 struct ata_eh_context
*ehc
= &link
->eh_context
;
1633 u32 serror
= ehc
->i
.serror
;
1634 unsigned int err_mask
= 0, action
= 0;
1637 if (serror
& (SERR_PERSISTENT
| SERR_DATA
)) {
1638 err_mask
|= AC_ERR_ATA_BUS
;
1639 action
|= ATA_EH_RESET
;
1641 if (serror
& SERR_PROTOCOL
) {
1642 err_mask
|= AC_ERR_HSM
;
1643 action
|= ATA_EH_RESET
;
1645 if (serror
& SERR_INTERNAL
) {
1646 err_mask
|= AC_ERR_SYSTEM
;
1647 action
|= ATA_EH_RESET
;
1650 /* Determine whether a hotplug event has occurred. Both
1651 * SError.N/X are considered hotplug events for enabled or
1652 * host links. For disabled PMP links, only N bit is
1653 * considered as X bit is left at 1 for link plugging.
1655 if (link
->lpm_policy
> ATA_LPM_MAX_POWER
)
1656 hotplug_mask
= 0; /* hotplug doesn't work w/ LPM */
1657 else if (!(link
->flags
& ATA_LFLAG_DISABLED
) || ata_is_host_link(link
))
1658 hotplug_mask
= SERR_PHYRDY_CHG
| SERR_DEV_XCHG
;
1660 hotplug_mask
= SERR_PHYRDY_CHG
;
1662 if (serror
& hotplug_mask
)
1663 ata_ehi_hotplugged(&ehc
->i
);
1665 ehc
->i
.err_mask
|= err_mask
;
1666 ehc
->i
.action
|= action
;
1670 * ata_eh_analyze_ncq_error - analyze NCQ error
1671 * @link: ATA link to analyze NCQ error for
1673 * Read log page 10h, determine the offending qc and acquire
1674 * error status TF. For NCQ device errors, all LLDDs have to do
1675 * is setting AC_ERR_DEV in ehi->err_mask. This function takes
1679 * Kernel thread context (may sleep).
1681 void ata_eh_analyze_ncq_error(struct ata_link
*link
)
1683 struct ata_port
*ap
= link
->ap
;
1684 struct ata_eh_context
*ehc
= &link
->eh_context
;
1685 struct ata_device
*dev
= link
->device
;
1686 struct ata_queued_cmd
*qc
;
1687 struct ata_taskfile tf
;
1690 /* if frozen, we can't do much */
1691 if (ap
->pflags
& ATA_PFLAG_FROZEN
)
1694 /* is it NCQ device error? */
1695 if (!link
->sactive
|| !(ehc
->i
.err_mask
& AC_ERR_DEV
))
1698 /* has LLDD analyzed already? */
1699 ata_qc_for_each_raw(ap
, qc
, tag
) {
1700 if (!(qc
->flags
& ATA_QCFLAG_FAILED
))
1707 /* okay, this error is ours */
1708 memset(&tf
, 0, sizeof(tf
));
1709 rc
= ata_eh_read_log_10h(dev
, &tag
, &tf
);
1711 ata_link_err(link
, "failed to read log page 10h (errno=%d)\n",
1716 if (!(link
->sactive
& (1 << tag
))) {
1717 ata_link_err(link
, "log page 10h reported inactive tag %d\n",
1722 /* we've got the perpetrator, condemn it */
1723 qc
= __ata_qc_from_tag(ap
, tag
);
1724 memcpy(&qc
->result_tf
, &tf
, sizeof(tf
));
1725 qc
->result_tf
.flags
= ATA_TFLAG_ISADDR
| ATA_TFLAG_LBA
| ATA_TFLAG_LBA48
;
1726 qc
->err_mask
|= AC_ERR_DEV
| AC_ERR_NCQ
;
1727 if (dev
->class == ATA_DEV_ZAC
&&
1728 ((qc
->result_tf
.command
& ATA_SENSE
) || qc
->result_tf
.auxiliary
)) {
1729 char sense_key
, asc
, ascq
;
1731 sense_key
= (qc
->result_tf
.auxiliary
>> 16) & 0xff;
1732 asc
= (qc
->result_tf
.auxiliary
>> 8) & 0xff;
1733 ascq
= qc
->result_tf
.auxiliary
& 0xff;
1734 ata_scsi_set_sense(dev
, qc
->scsicmd
, sense_key
, asc
, ascq
);
1735 ata_scsi_set_sense_information(dev
, qc
->scsicmd
,
1737 qc
->flags
|= ATA_QCFLAG_SENSE_VALID
;
1740 ehc
->i
.err_mask
&= ~AC_ERR_DEV
;
1744 * ata_eh_analyze_tf - analyze taskfile of a failed qc
1745 * @qc: qc to analyze
1746 * @tf: Taskfile registers to analyze
1748 * Analyze taskfile of @qc and further determine cause of
1749 * failure. This function also requests ATAPI sense data if
1753 * Kernel thread context (may sleep).
1756 * Determined recovery action
1758 static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd
*qc
,
1759 const struct ata_taskfile
*tf
)
1761 unsigned int tmp
, action
= 0;
1762 u8 stat
= tf
->command
, err
= tf
->feature
;
1764 if ((stat
& (ATA_BUSY
| ATA_DRQ
| ATA_DRDY
)) != ATA_DRDY
) {
1765 qc
->err_mask
|= AC_ERR_HSM
;
1766 return ATA_EH_RESET
;
1769 if (stat
& (ATA_ERR
| ATA_DF
)) {
1770 qc
->err_mask
|= AC_ERR_DEV
;
1772 * Sense data reporting does not work if the
1773 * device fault bit is set.
1781 switch (qc
->dev
->class) {
1783 if (stat
& ATA_SENSE
)
1784 ata_eh_request_sense(qc
, qc
->scsicmd
);
1788 qc
->err_mask
|= AC_ERR_ATA_BUS
;
1789 if (err
& (ATA_UNC
| ATA_AMNF
))
1790 qc
->err_mask
|= AC_ERR_MEDIA
;
1792 qc
->err_mask
|= AC_ERR_INVALID
;
1796 if (!(qc
->ap
->pflags
& ATA_PFLAG_FROZEN
)) {
1797 tmp
= atapi_eh_request_sense(qc
->dev
,
1798 qc
->scsicmd
->sense_buffer
,
1799 qc
->result_tf
.feature
>> 4);
1801 qc
->flags
|= ATA_QCFLAG_SENSE_VALID
;
1803 qc
->err_mask
|= tmp
;
1807 if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
) {
1808 int ret
= scsi_check_sense(qc
->scsicmd
);
1810 * SUCCESS here means that the sense code could be
1811 * evaluated and should be passed to the upper layers
1812 * for correct evaluation.
1813 * FAILED means the sense code could not be interpreted
1814 * and the device would need to be reset.
1815 * NEEDS_RETRY and ADD_TO_MLQUEUE means that the
1816 * command would need to be retried.
1818 if (ret
== NEEDS_RETRY
|| ret
== ADD_TO_MLQUEUE
) {
1819 qc
->flags
|= ATA_QCFLAG_RETRY
;
1820 qc
->err_mask
|= AC_ERR_OTHER
;
1821 } else if (ret
!= SUCCESS
) {
1822 qc
->err_mask
|= AC_ERR_HSM
;
1825 if (qc
->err_mask
& (AC_ERR_HSM
| AC_ERR_TIMEOUT
| AC_ERR_ATA_BUS
))
1826 action
|= ATA_EH_RESET
;
1831 static int ata_eh_categorize_error(unsigned int eflags
, unsigned int err_mask
,
1836 if (!(eflags
& ATA_EFLAG_DUBIOUS_XFER
))
1840 base
= ATA_ECAT_DUBIOUS_NONE
;
1842 if (err_mask
& AC_ERR_ATA_BUS
)
1843 return base
+ ATA_ECAT_ATA_BUS
;
1845 if (err_mask
& AC_ERR_TIMEOUT
)
1846 return base
+ ATA_ECAT_TOUT_HSM
;
1848 if (eflags
& ATA_EFLAG_IS_IO
) {
1849 if (err_mask
& AC_ERR_HSM
)
1850 return base
+ ATA_ECAT_TOUT_HSM
;
1852 (AC_ERR_DEV
|AC_ERR_MEDIA
|AC_ERR_INVALID
)) == AC_ERR_DEV
)
1853 return base
+ ATA_ECAT_UNK_DEV
;
1859 struct speed_down_verdict_arg
{
1862 int nr_errors
[ATA_ECAT_NR
];
1865 static int speed_down_verdict_cb(struct ata_ering_entry
*ent
, void *void_arg
)
1867 struct speed_down_verdict_arg
*arg
= void_arg
;
1870 if ((ent
->eflags
& ATA_EFLAG_OLD_ER
) || (ent
->timestamp
< arg
->since
))
1873 cat
= ata_eh_categorize_error(ent
->eflags
, ent
->err_mask
,
1875 arg
->nr_errors
[cat
]++;
1881 * ata_eh_speed_down_verdict - Determine speed down verdict
1882 * @dev: Device of interest
1884 * This function examines error ring of @dev and determines
1885 * whether NCQ needs to be turned off, transfer speed should be
1886 * stepped down, or falling back to PIO is necessary.
1888 * ECAT_ATA_BUS : ATA_BUS error for any command
1890 * ECAT_TOUT_HSM : TIMEOUT for any command or HSM violation for
1893 * ECAT_UNK_DEV : Unknown DEV error for IO commands
1895 * ECAT_DUBIOUS_* : Identical to above three but occurred while
1896 * data transfer hasn't been verified.
1900 * NCQ_OFF : Turn off NCQ.
1902 * SPEED_DOWN : Speed down transfer speed but don't fall back
1905 * FALLBACK_TO_PIO : Fall back to PIO.
1907 * Even if multiple verdicts are returned, only one action is
1908 * taken per error. An action triggered by non-DUBIOUS errors
1909 * clears ering, while one triggered by DUBIOUS_* errors doesn't.
1910 * This is to expedite speed down decisions right after device is
1911 * initially configured.
1913 * The following are speed down rules. #1 and #2 deal with
1916 * 1. If more than one DUBIOUS_ATA_BUS or DUBIOUS_TOUT_HSM errors
1917 * occurred during last 5 mins, SPEED_DOWN and FALLBACK_TO_PIO.
1919 * 2. If more than one DUBIOUS_TOUT_HSM or DUBIOUS_UNK_DEV errors
1920 * occurred during last 5 mins, NCQ_OFF.
1922 * 3. If more than 8 ATA_BUS, TOUT_HSM or UNK_DEV errors
1923 * occurred during last 5 mins, FALLBACK_TO_PIO
1925 * 4. If more than 3 TOUT_HSM or UNK_DEV errors occurred
1926 * during last 10 mins, NCQ_OFF.
1928 * 5. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6
1929 * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN.
1932 * Inherited from caller.
1935 * OR of ATA_EH_SPDN_* flags.
1937 static unsigned int ata_eh_speed_down_verdict(struct ata_device
*dev
)
1939 const u64 j5mins
= 5LLU * 60 * HZ
, j10mins
= 10LLU * 60 * HZ
;
1940 u64 j64
= get_jiffies_64();
1941 struct speed_down_verdict_arg arg
;
1942 unsigned int verdict
= 0;
1944 /* scan past 5 mins of error history */
1945 memset(&arg
, 0, sizeof(arg
));
1946 arg
.since
= j64
- min(j64
, j5mins
);
1947 ata_ering_map(&dev
->ering
, speed_down_verdict_cb
, &arg
);
1949 if (arg
.nr_errors
[ATA_ECAT_DUBIOUS_ATA_BUS
] +
1950 arg
.nr_errors
[ATA_ECAT_DUBIOUS_TOUT_HSM
] > 1)
1951 verdict
|= ATA_EH_SPDN_SPEED_DOWN
|
1952 ATA_EH_SPDN_FALLBACK_TO_PIO
| ATA_EH_SPDN_KEEP_ERRORS
;
1954 if (arg
.nr_errors
[ATA_ECAT_DUBIOUS_TOUT_HSM
] +
1955 arg
.nr_errors
[ATA_ECAT_DUBIOUS_UNK_DEV
] > 1)
1956 verdict
|= ATA_EH_SPDN_NCQ_OFF
| ATA_EH_SPDN_KEEP_ERRORS
;
1958 if (arg
.nr_errors
[ATA_ECAT_ATA_BUS
] +
1959 arg
.nr_errors
[ATA_ECAT_TOUT_HSM
] +
1960 arg
.nr_errors
[ATA_ECAT_UNK_DEV
] > 6)
1961 verdict
|= ATA_EH_SPDN_FALLBACK_TO_PIO
;
1963 /* scan past 10 mins of error history */
1964 memset(&arg
, 0, sizeof(arg
));
1965 arg
.since
= j64
- min(j64
, j10mins
);
1966 ata_ering_map(&dev
->ering
, speed_down_verdict_cb
, &arg
);
1968 if (arg
.nr_errors
[ATA_ECAT_TOUT_HSM
] +
1969 arg
.nr_errors
[ATA_ECAT_UNK_DEV
] > 3)
1970 verdict
|= ATA_EH_SPDN_NCQ_OFF
;
1972 if (arg
.nr_errors
[ATA_ECAT_ATA_BUS
] +
1973 arg
.nr_errors
[ATA_ECAT_TOUT_HSM
] > 3 ||
1974 arg
.nr_errors
[ATA_ECAT_UNK_DEV
] > 6)
1975 verdict
|= ATA_EH_SPDN_SPEED_DOWN
;
1981 * ata_eh_speed_down - record error and speed down if necessary
1982 * @dev: Failed device
1983 * @eflags: mask of ATA_EFLAG_* flags
1984 * @err_mask: err_mask of the error
1986 * Record error and examine error history to determine whether
1987 * adjusting transmission speed is necessary. It also sets
1988 * transmission limits appropriately if such adjustment is
1992 * Kernel thread context (may sleep).
1995 * Determined recovery action.
1997 static unsigned int ata_eh_speed_down(struct ata_device
*dev
,
1998 unsigned int eflags
, unsigned int err_mask
)
2000 struct ata_link
*link
= ata_dev_phys_link(dev
);
2002 unsigned int verdict
;
2003 unsigned int action
= 0;
2005 /* don't bother if Cat-0 error */
2006 if (ata_eh_categorize_error(eflags
, err_mask
, &xfer_ok
) == 0)
2009 /* record error and determine whether speed down is necessary */
2010 ata_ering_record(&dev
->ering
, eflags
, err_mask
);
2011 verdict
= ata_eh_speed_down_verdict(dev
);
2014 if ((verdict
& ATA_EH_SPDN_NCQ_OFF
) &&
2015 (dev
->flags
& (ATA_DFLAG_PIO
| ATA_DFLAG_NCQ
|
2016 ATA_DFLAG_NCQ_OFF
)) == ATA_DFLAG_NCQ
) {
2017 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
2018 ata_dev_warn(dev
, "NCQ disabled due to excessive errors\n");
2023 if (verdict
& ATA_EH_SPDN_SPEED_DOWN
) {
2024 /* speed down SATA link speed if possible */
2025 if (sata_down_spd_limit(link
, 0) == 0) {
2026 action
|= ATA_EH_RESET
;
2030 /* lower transfer mode */
2031 if (dev
->spdn_cnt
< 2) {
2032 static const int dma_dnxfer_sel
[] =
2033 { ATA_DNXFER_DMA
, ATA_DNXFER_40C
};
2034 static const int pio_dnxfer_sel
[] =
2035 { ATA_DNXFER_PIO
, ATA_DNXFER_FORCE_PIO0
};
2038 if (dev
->xfer_shift
!= ATA_SHIFT_PIO
)
2039 sel
= dma_dnxfer_sel
[dev
->spdn_cnt
];
2041 sel
= pio_dnxfer_sel
[dev
->spdn_cnt
];
2045 if (ata_down_xfermask_limit(dev
, sel
) == 0) {
2046 action
|= ATA_EH_RESET
;
2052 /* Fall back to PIO? Slowing down to PIO is meaningless for
2053 * SATA ATA devices. Consider it only for PATA and SATAPI.
2055 if ((verdict
& ATA_EH_SPDN_FALLBACK_TO_PIO
) && (dev
->spdn_cnt
>= 2) &&
2056 (link
->ap
->cbl
!= ATA_CBL_SATA
|| dev
->class == ATA_DEV_ATAPI
) &&
2057 (dev
->xfer_shift
!= ATA_SHIFT_PIO
)) {
2058 if (ata_down_xfermask_limit(dev
, ATA_DNXFER_FORCE_PIO
) == 0) {
2060 action
|= ATA_EH_RESET
;
2067 /* device has been slowed down, blow error history */
2068 if (!(verdict
& ATA_EH_SPDN_KEEP_ERRORS
))
2069 ata_ering_clear(&dev
->ering
);
2074 * ata_eh_worth_retry - analyze error and decide whether to retry
2075 * @qc: qc to possibly retry
2077 * Look at the cause of the error and decide if a retry
2078 * might be useful or not. We don't want to retry media errors
2079 * because the drive itself has probably already taken 10-30 seconds
2080 * doing its own internal retries before reporting the failure.
2082 static inline int ata_eh_worth_retry(struct ata_queued_cmd
*qc
)
2084 if (qc
->err_mask
& AC_ERR_MEDIA
)
2085 return 0; /* don't retry media errors */
2086 if (qc
->flags
& ATA_QCFLAG_IO
)
2087 return 1; /* otherwise retry anything from fs stack */
2088 if (qc
->err_mask
& AC_ERR_INVALID
)
2089 return 0; /* don't retry these */
2090 return qc
->err_mask
!= AC_ERR_DEV
; /* retry if not dev error */
2094 * ata_eh_quiet - check if we need to be quiet about a command error
2097 * Look at the qc flags anbd its scsi command request flags to determine
2098 * if we need to be quiet about the command failure.
2100 static inline bool ata_eh_quiet(struct ata_queued_cmd
*qc
)
2103 qc
->scsicmd
->request
->rq_flags
& RQF_QUIET
)
2104 qc
->flags
|= ATA_QCFLAG_QUIET
;
2105 return qc
->flags
& ATA_QCFLAG_QUIET
;
2109 * ata_eh_link_autopsy - analyze error and determine recovery action
2110 * @link: host link to perform autopsy on
2112 * Analyze why @link failed and determine which recovery actions
2113 * are needed. This function also sets more detailed AC_ERR_*
2114 * values and fills sense data for ATAPI CHECK SENSE.
2117 * Kernel thread context (may sleep).
2119 static void ata_eh_link_autopsy(struct ata_link
*link
)
2121 struct ata_port
*ap
= link
->ap
;
2122 struct ata_eh_context
*ehc
= &link
->eh_context
;
2123 struct ata_queued_cmd
*qc
;
2124 struct ata_device
*dev
;
2125 unsigned int all_err_mask
= 0, eflags
= 0;
2126 int tag
, nr_failed
= 0, nr_quiet
= 0;
2132 if (ehc
->i
.flags
& ATA_EHI_NO_AUTOPSY
)
2135 /* obtain and analyze SError */
2136 rc
= sata_scr_read(link
, SCR_ERROR
, &serror
);
2138 ehc
->i
.serror
|= serror
;
2139 ata_eh_analyze_serror(link
);
2140 } else if (rc
!= -EOPNOTSUPP
) {
2141 /* SError read failed, force reset and probing */
2142 ehc
->i
.probe_mask
|= ATA_ALL_DEVICES
;
2143 ehc
->i
.action
|= ATA_EH_RESET
;
2144 ehc
->i
.err_mask
|= AC_ERR_OTHER
;
2147 /* analyze NCQ failure */
2148 ata_eh_analyze_ncq_error(link
);
2150 /* any real error trumps AC_ERR_OTHER */
2151 if (ehc
->i
.err_mask
& ~AC_ERR_OTHER
)
2152 ehc
->i
.err_mask
&= ~AC_ERR_OTHER
;
2154 all_err_mask
|= ehc
->i
.err_mask
;
2156 ata_qc_for_each_raw(ap
, qc
, tag
) {
2157 if (!(qc
->flags
& ATA_QCFLAG_FAILED
) ||
2158 ata_dev_phys_link(qc
->dev
) != link
)
2161 /* inherit upper level err_mask */
2162 qc
->err_mask
|= ehc
->i
.err_mask
;
2165 ehc
->i
.action
|= ata_eh_analyze_tf(qc
, &qc
->result_tf
);
2167 /* DEV errors are probably spurious in case of ATA_BUS error */
2168 if (qc
->err_mask
& AC_ERR_ATA_BUS
)
2169 qc
->err_mask
&= ~(AC_ERR_DEV
| AC_ERR_MEDIA
|
2172 /* any real error trumps unknown error */
2173 if (qc
->err_mask
& ~AC_ERR_OTHER
)
2174 qc
->err_mask
&= ~AC_ERR_OTHER
;
2177 * SENSE_VALID trumps dev/unknown error and revalidation. Upper
2178 * layers will determine whether the command is worth retrying
2179 * based on the sense data and device class/type. Otherwise,
2180 * determine directly if the command is worth retrying using its
2181 * error mask and flags.
2183 if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
)
2184 qc
->err_mask
&= ~(AC_ERR_DEV
| AC_ERR_OTHER
);
2185 else if (ata_eh_worth_retry(qc
))
2186 qc
->flags
|= ATA_QCFLAG_RETRY
;
2188 /* accumulate error info */
2189 ehc
->i
.dev
= qc
->dev
;
2190 all_err_mask
|= qc
->err_mask
;
2191 if (qc
->flags
& ATA_QCFLAG_IO
)
2192 eflags
|= ATA_EFLAG_IS_IO
;
2193 trace_ata_eh_link_autopsy_qc(qc
);
2195 /* Count quiet errors */
2196 if (ata_eh_quiet(qc
))
2201 /* If all failed commands requested silence, then be quiet */
2202 if (nr_quiet
== nr_failed
)
2203 ehc
->i
.flags
|= ATA_EHI_QUIET
;
2205 /* enforce default EH actions */
2206 if (ap
->pflags
& ATA_PFLAG_FROZEN
||
2207 all_err_mask
& (AC_ERR_HSM
| AC_ERR_TIMEOUT
))
2208 ehc
->i
.action
|= ATA_EH_RESET
;
2209 else if (((eflags
& ATA_EFLAG_IS_IO
) && all_err_mask
) ||
2210 (!(eflags
& ATA_EFLAG_IS_IO
) && (all_err_mask
& ~AC_ERR_DEV
)))
2211 ehc
->i
.action
|= ATA_EH_REVALIDATE
;
2213 /* If we have offending qcs and the associated failed device,
2214 * perform per-dev EH action only on the offending device.
2217 ehc
->i
.dev_action
[ehc
->i
.dev
->devno
] |=
2218 ehc
->i
.action
& ATA_EH_PERDEV_MASK
;
2219 ehc
->i
.action
&= ~ATA_EH_PERDEV_MASK
;
2222 /* propagate timeout to host link */
2223 if ((all_err_mask
& AC_ERR_TIMEOUT
) && !ata_is_host_link(link
))
2224 ap
->link
.eh_context
.i
.err_mask
|= AC_ERR_TIMEOUT
;
2226 /* record error and consider speeding down */
2228 if (!dev
&& ((ata_link_max_devices(link
) == 1 &&
2229 ata_dev_enabled(link
->device
))))
2233 if (dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
)
2234 eflags
|= ATA_EFLAG_DUBIOUS_XFER
;
2235 ehc
->i
.action
|= ata_eh_speed_down(dev
, eflags
, all_err_mask
);
2236 trace_ata_eh_link_autopsy(dev
, ehc
->i
.action
, all_err_mask
);
2242 * ata_eh_autopsy - analyze error and determine recovery action
2243 * @ap: host port to perform autopsy on
2245 * Analyze all links of @ap and determine why they failed and
2246 * which recovery actions are needed.
2249 * Kernel thread context (may sleep).
2251 void ata_eh_autopsy(struct ata_port
*ap
)
2253 struct ata_link
*link
;
2255 ata_for_each_link(link
, ap
, EDGE
)
2256 ata_eh_link_autopsy(link
);
2258 /* Handle the frigging slave link. Autopsy is done similarly
2259 * but actions and flags are transferred over to the master
2260 * link and handled from there.
2262 if (ap
->slave_link
) {
2263 struct ata_eh_context
*mehc
= &ap
->link
.eh_context
;
2264 struct ata_eh_context
*sehc
= &ap
->slave_link
->eh_context
;
2266 /* transfer control flags from master to slave */
2267 sehc
->i
.flags
|= mehc
->i
.flags
& ATA_EHI_TO_SLAVE_MASK
;
2269 /* perform autopsy on the slave link */
2270 ata_eh_link_autopsy(ap
->slave_link
);
2272 /* transfer actions from slave to master and clear slave */
2273 ata_eh_about_to_do(ap
->slave_link
, NULL
, ATA_EH_ALL_ACTIONS
);
2274 mehc
->i
.action
|= sehc
->i
.action
;
2275 mehc
->i
.dev_action
[1] |= sehc
->i
.dev_action
[1];
2276 mehc
->i
.flags
|= sehc
->i
.flags
;
2277 ata_eh_done(ap
->slave_link
, NULL
, ATA_EH_ALL_ACTIONS
);
2280 /* Autopsy of fanout ports can affect host link autopsy.
2281 * Perform host link autopsy last.
2283 if (sata_pmp_attached(ap
))
2284 ata_eh_link_autopsy(&ap
->link
);
2288 * ata_get_cmd_descript - get description for ATA command
2289 * @command: ATA command code to get description for
2291 * Return a textual description of the given command, or NULL if the
2292 * command is not known.
2297 const char *ata_get_cmd_descript(u8 command
)
2299 #ifdef CONFIG_ATA_VERBOSE_ERROR
2305 { ATA_CMD_DEV_RESET
, "DEVICE RESET" },
2306 { ATA_CMD_CHK_POWER
, "CHECK POWER MODE" },
2307 { ATA_CMD_STANDBY
, "STANDBY" },
2308 { ATA_CMD_IDLE
, "IDLE" },
2309 { ATA_CMD_EDD
, "EXECUTE DEVICE DIAGNOSTIC" },
2310 { ATA_CMD_DOWNLOAD_MICRO
, "DOWNLOAD MICROCODE" },
2311 { ATA_CMD_DOWNLOAD_MICRO_DMA
, "DOWNLOAD MICROCODE DMA" },
2312 { ATA_CMD_NOP
, "NOP" },
2313 { ATA_CMD_FLUSH
, "FLUSH CACHE" },
2314 { ATA_CMD_FLUSH_EXT
, "FLUSH CACHE EXT" },
2315 { ATA_CMD_ID_ATA
, "IDENTIFY DEVICE" },
2316 { ATA_CMD_ID_ATAPI
, "IDENTIFY PACKET DEVICE" },
2317 { ATA_CMD_SERVICE
, "SERVICE" },
2318 { ATA_CMD_READ
, "READ DMA" },
2319 { ATA_CMD_READ_EXT
, "READ DMA EXT" },
2320 { ATA_CMD_READ_QUEUED
, "READ DMA QUEUED" },
2321 { ATA_CMD_READ_STREAM_EXT
, "READ STREAM EXT" },
2322 { ATA_CMD_READ_STREAM_DMA_EXT
, "READ STREAM DMA EXT" },
2323 { ATA_CMD_WRITE
, "WRITE DMA" },
2324 { ATA_CMD_WRITE_EXT
, "WRITE DMA EXT" },
2325 { ATA_CMD_WRITE_QUEUED
, "WRITE DMA QUEUED EXT" },
2326 { ATA_CMD_WRITE_STREAM_EXT
, "WRITE STREAM EXT" },
2327 { ATA_CMD_WRITE_STREAM_DMA_EXT
, "WRITE STREAM DMA EXT" },
2328 { ATA_CMD_WRITE_FUA_EXT
, "WRITE DMA FUA EXT" },
2329 { ATA_CMD_WRITE_QUEUED_FUA_EXT
, "WRITE DMA QUEUED FUA EXT" },
2330 { ATA_CMD_FPDMA_READ
, "READ FPDMA QUEUED" },
2331 { ATA_CMD_FPDMA_WRITE
, "WRITE FPDMA QUEUED" },
2332 { ATA_CMD_FPDMA_SEND
, "SEND FPDMA QUEUED" },
2333 { ATA_CMD_FPDMA_RECV
, "RECEIVE FPDMA QUEUED" },
2334 { ATA_CMD_PIO_READ
, "READ SECTOR(S)" },
2335 { ATA_CMD_PIO_READ_EXT
, "READ SECTOR(S) EXT" },
2336 { ATA_CMD_PIO_WRITE
, "WRITE SECTOR(S)" },
2337 { ATA_CMD_PIO_WRITE_EXT
, "WRITE SECTOR(S) EXT" },
2338 { ATA_CMD_READ_MULTI
, "READ MULTIPLE" },
2339 { ATA_CMD_READ_MULTI_EXT
, "READ MULTIPLE EXT" },
2340 { ATA_CMD_WRITE_MULTI
, "WRITE MULTIPLE" },
2341 { ATA_CMD_WRITE_MULTI_EXT
, "WRITE MULTIPLE EXT" },
2342 { ATA_CMD_WRITE_MULTI_FUA_EXT
, "WRITE MULTIPLE FUA EXT" },
2343 { ATA_CMD_SET_FEATURES
, "SET FEATURES" },
2344 { ATA_CMD_SET_MULTI
, "SET MULTIPLE MODE" },
2345 { ATA_CMD_VERIFY
, "READ VERIFY SECTOR(S)" },
2346 { ATA_CMD_VERIFY_EXT
, "READ VERIFY SECTOR(S) EXT" },
2347 { ATA_CMD_WRITE_UNCORR_EXT
, "WRITE UNCORRECTABLE EXT" },
2348 { ATA_CMD_STANDBYNOW1
, "STANDBY IMMEDIATE" },
2349 { ATA_CMD_IDLEIMMEDIATE
, "IDLE IMMEDIATE" },
2350 { ATA_CMD_SLEEP
, "SLEEP" },
2351 { ATA_CMD_INIT_DEV_PARAMS
, "INITIALIZE DEVICE PARAMETERS" },
2352 { ATA_CMD_READ_NATIVE_MAX
, "READ NATIVE MAX ADDRESS" },
2353 { ATA_CMD_READ_NATIVE_MAX_EXT
, "READ NATIVE MAX ADDRESS EXT" },
2354 { ATA_CMD_SET_MAX
, "SET MAX ADDRESS" },
2355 { ATA_CMD_SET_MAX_EXT
, "SET MAX ADDRESS EXT" },
2356 { ATA_CMD_READ_LOG_EXT
, "READ LOG EXT" },
2357 { ATA_CMD_WRITE_LOG_EXT
, "WRITE LOG EXT" },
2358 { ATA_CMD_READ_LOG_DMA_EXT
, "READ LOG DMA EXT" },
2359 { ATA_CMD_WRITE_LOG_DMA_EXT
, "WRITE LOG DMA EXT" },
2360 { ATA_CMD_TRUSTED_NONDATA
, "TRUSTED NON-DATA" },
2361 { ATA_CMD_TRUSTED_RCV
, "TRUSTED RECEIVE" },
2362 { ATA_CMD_TRUSTED_RCV_DMA
, "TRUSTED RECEIVE DMA" },
2363 { ATA_CMD_TRUSTED_SND
, "TRUSTED SEND" },
2364 { ATA_CMD_TRUSTED_SND_DMA
, "TRUSTED SEND DMA" },
2365 { ATA_CMD_PMP_READ
, "READ BUFFER" },
2366 { ATA_CMD_PMP_READ_DMA
, "READ BUFFER DMA" },
2367 { ATA_CMD_PMP_WRITE
, "WRITE BUFFER" },
2368 { ATA_CMD_PMP_WRITE_DMA
, "WRITE BUFFER DMA" },
2369 { ATA_CMD_CONF_OVERLAY
, "DEVICE CONFIGURATION OVERLAY" },
2370 { ATA_CMD_SEC_SET_PASS
, "SECURITY SET PASSWORD" },
2371 { ATA_CMD_SEC_UNLOCK
, "SECURITY UNLOCK" },
2372 { ATA_CMD_SEC_ERASE_PREP
, "SECURITY ERASE PREPARE" },
2373 { ATA_CMD_SEC_ERASE_UNIT
, "SECURITY ERASE UNIT" },
2374 { ATA_CMD_SEC_FREEZE_LOCK
, "SECURITY FREEZE LOCK" },
2375 { ATA_CMD_SEC_DISABLE_PASS
, "SECURITY DISABLE PASSWORD" },
2376 { ATA_CMD_CONFIG_STREAM
, "CONFIGURE STREAM" },
2377 { ATA_CMD_SMART
, "SMART" },
2378 { ATA_CMD_MEDIA_LOCK
, "DOOR LOCK" },
2379 { ATA_CMD_MEDIA_UNLOCK
, "DOOR UNLOCK" },
2380 { ATA_CMD_DSM
, "DATA SET MANAGEMENT" },
2381 { ATA_CMD_CHK_MED_CRD_TYP
, "CHECK MEDIA CARD TYPE" },
2382 { ATA_CMD_CFA_REQ_EXT_ERR
, "CFA REQUEST EXTENDED ERROR" },
2383 { ATA_CMD_CFA_WRITE_NE
, "CFA WRITE SECTORS WITHOUT ERASE" },
2384 { ATA_CMD_CFA_TRANS_SECT
, "CFA TRANSLATE SECTOR" },
2385 { ATA_CMD_CFA_ERASE
, "CFA ERASE SECTORS" },
2386 { ATA_CMD_CFA_WRITE_MULT_NE
, "CFA WRITE MULTIPLE WITHOUT ERASE" },
2387 { ATA_CMD_REQ_SENSE_DATA
, "REQUEST SENSE DATA EXT" },
2388 { ATA_CMD_SANITIZE_DEVICE
, "SANITIZE DEVICE" },
2389 { ATA_CMD_ZAC_MGMT_IN
, "ZAC MANAGEMENT IN" },
2390 { ATA_CMD_ZAC_MGMT_OUT
, "ZAC MANAGEMENT OUT" },
2391 { ATA_CMD_READ_LONG
, "READ LONG (with retries)" },
2392 { ATA_CMD_READ_LONG_ONCE
, "READ LONG (without retries)" },
2393 { ATA_CMD_WRITE_LONG
, "WRITE LONG (with retries)" },
2394 { ATA_CMD_WRITE_LONG_ONCE
, "WRITE LONG (without retries)" },
2395 { ATA_CMD_RESTORE
, "RECALIBRATE" },
2396 { 0, NULL
} /* terminate list */
2400 for (i
= 0; cmd_descr
[i
].text
; i
++)
2401 if (cmd_descr
[i
].command
== command
)
2402 return cmd_descr
[i
].text
;
2407 EXPORT_SYMBOL_GPL(ata_get_cmd_descript
);
2410 * ata_eh_link_report - report error handling to user
2411 * @link: ATA link EH is going on
2413 * Report EH to user.
2418 static void ata_eh_link_report(struct ata_link
*link
)
2420 struct ata_port
*ap
= link
->ap
;
2421 struct ata_eh_context
*ehc
= &link
->eh_context
;
2422 struct ata_queued_cmd
*qc
;
2423 const char *frozen
, *desc
;
2424 char tries_buf
[6] = "";
2425 int tag
, nr_failed
= 0;
2427 if (ehc
->i
.flags
& ATA_EHI_QUIET
)
2431 if (ehc
->i
.desc
[0] != '\0')
2434 ata_qc_for_each_raw(ap
, qc
, tag
) {
2435 if (!(qc
->flags
& ATA_QCFLAG_FAILED
) ||
2436 ata_dev_phys_link(qc
->dev
) != link
||
2437 ((qc
->flags
& ATA_QCFLAG_QUIET
) &&
2438 qc
->err_mask
== AC_ERR_DEV
))
2440 if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
&& !qc
->err_mask
)
2446 if (!nr_failed
&& !ehc
->i
.err_mask
)
2450 if (ap
->pflags
& ATA_PFLAG_FROZEN
)
2453 if (ap
->eh_tries
< ATA_EH_MAX_TRIES
)
2454 snprintf(tries_buf
, sizeof(tries_buf
), " t%d",
2458 ata_dev_err(ehc
->i
.dev
, "exception Emask 0x%x "
2459 "SAct 0x%x SErr 0x%x action 0x%x%s%s\n",
2460 ehc
->i
.err_mask
, link
->sactive
, ehc
->i
.serror
,
2461 ehc
->i
.action
, frozen
, tries_buf
);
2463 ata_dev_err(ehc
->i
.dev
, "%s\n", desc
);
2465 ata_link_err(link
, "exception Emask 0x%x "
2466 "SAct 0x%x SErr 0x%x action 0x%x%s%s\n",
2467 ehc
->i
.err_mask
, link
->sactive
, ehc
->i
.serror
,
2468 ehc
->i
.action
, frozen
, tries_buf
);
2470 ata_link_err(link
, "%s\n", desc
);
2473 #ifdef CONFIG_ATA_VERBOSE_ERROR
2476 "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n",
2477 ehc
->i
.serror
& SERR_DATA_RECOVERED
? "RecovData " : "",
2478 ehc
->i
.serror
& SERR_COMM_RECOVERED
? "RecovComm " : "",
2479 ehc
->i
.serror
& SERR_DATA
? "UnrecovData " : "",
2480 ehc
->i
.serror
& SERR_PERSISTENT
? "Persist " : "",
2481 ehc
->i
.serror
& SERR_PROTOCOL
? "Proto " : "",
2482 ehc
->i
.serror
& SERR_INTERNAL
? "HostInt " : "",
2483 ehc
->i
.serror
& SERR_PHYRDY_CHG
? "PHYRdyChg " : "",
2484 ehc
->i
.serror
& SERR_PHY_INT_ERR
? "PHYInt " : "",
2485 ehc
->i
.serror
& SERR_COMM_WAKE
? "CommWake " : "",
2486 ehc
->i
.serror
& SERR_10B_8B_ERR
? "10B8B " : "",
2487 ehc
->i
.serror
& SERR_DISPARITY
? "Dispar " : "",
2488 ehc
->i
.serror
& SERR_CRC
? "BadCRC " : "",
2489 ehc
->i
.serror
& SERR_HANDSHAKE
? "Handshk " : "",
2490 ehc
->i
.serror
& SERR_LINK_SEQ_ERR
? "LinkSeq " : "",
2491 ehc
->i
.serror
& SERR_TRANS_ST_ERROR
? "TrStaTrns " : "",
2492 ehc
->i
.serror
& SERR_UNRECOG_FIS
? "UnrecFIS " : "",
2493 ehc
->i
.serror
& SERR_DEV_XCHG
? "DevExch " : "");
2496 ata_qc_for_each_raw(ap
, qc
, tag
) {
2497 struct ata_taskfile
*cmd
= &qc
->tf
, *res
= &qc
->result_tf
;
2498 char data_buf
[20] = "";
2499 char cdb_buf
[70] = "";
2501 if (!(qc
->flags
& ATA_QCFLAG_FAILED
) ||
2502 ata_dev_phys_link(qc
->dev
) != link
|| !qc
->err_mask
)
2505 if (qc
->dma_dir
!= DMA_NONE
) {
2506 static const char *dma_str
[] = {
2507 [DMA_BIDIRECTIONAL
] = "bidi",
2508 [DMA_TO_DEVICE
] = "out",
2509 [DMA_FROM_DEVICE
] = "in",
2511 const char *prot_str
= NULL
;
2513 switch (qc
->tf
.protocol
) {
2514 case ATA_PROT_UNKNOWN
:
2515 prot_str
= "unknown";
2517 case ATA_PROT_NODATA
:
2518 prot_str
= "nodata";
2527 prot_str
= "ncq dma";
2529 case ATA_PROT_NCQ_NODATA
:
2530 prot_str
= "ncq nodata";
2532 case ATAPI_PROT_NODATA
:
2533 prot_str
= "nodata";
2535 case ATAPI_PROT_PIO
:
2538 case ATAPI_PROT_DMA
:
2542 snprintf(data_buf
, sizeof(data_buf
), " %s %u %s",
2543 prot_str
, qc
->nbytes
, dma_str
[qc
->dma_dir
]);
2546 if (ata_is_atapi(qc
->tf
.protocol
)) {
2547 const u8
*cdb
= qc
->cdb
;
2548 size_t cdb_len
= qc
->dev
->cdb_len
;
2551 cdb
= qc
->scsicmd
->cmnd
;
2552 cdb_len
= qc
->scsicmd
->cmd_len
;
2554 __scsi_format_command(cdb_buf
, sizeof(cdb_buf
),
2557 const char *descr
= ata_get_cmd_descript(cmd
->command
);
2559 ata_dev_err(qc
->dev
, "failed command: %s\n",
2563 ata_dev_err(qc
->dev
,
2564 "cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x "
2566 "res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x "
2567 "Emask 0x%x (%s)%s\n",
2568 cmd
->command
, cmd
->feature
, cmd
->nsect
,
2569 cmd
->lbal
, cmd
->lbam
, cmd
->lbah
,
2570 cmd
->hob_feature
, cmd
->hob_nsect
,
2571 cmd
->hob_lbal
, cmd
->hob_lbam
, cmd
->hob_lbah
,
2572 cmd
->device
, qc
->tag
, data_buf
, cdb_buf
,
2573 res
->command
, res
->feature
, res
->nsect
,
2574 res
->lbal
, res
->lbam
, res
->lbah
,
2575 res
->hob_feature
, res
->hob_nsect
,
2576 res
->hob_lbal
, res
->hob_lbam
, res
->hob_lbah
,
2577 res
->device
, qc
->err_mask
, ata_err_string(qc
->err_mask
),
2578 qc
->err_mask
& AC_ERR_NCQ
? " <F>" : "");
2580 #ifdef CONFIG_ATA_VERBOSE_ERROR
2581 if (res
->command
& (ATA_BUSY
| ATA_DRDY
| ATA_DF
| ATA_DRQ
|
2582 ATA_SENSE
| ATA_ERR
)) {
2583 if (res
->command
& ATA_BUSY
)
2584 ata_dev_err(qc
->dev
, "status: { Busy }\n");
2586 ata_dev_err(qc
->dev
, "status: { %s%s%s%s%s}\n",
2587 res
->command
& ATA_DRDY
? "DRDY " : "",
2588 res
->command
& ATA_DF
? "DF " : "",
2589 res
->command
& ATA_DRQ
? "DRQ " : "",
2590 res
->command
& ATA_SENSE
? "SENSE " : "",
2591 res
->command
& ATA_ERR
? "ERR " : "");
2594 if (cmd
->command
!= ATA_CMD_PACKET
&&
2595 (res
->feature
& (ATA_ICRC
| ATA_UNC
| ATA_AMNF
|
2596 ATA_IDNF
| ATA_ABORTED
)))
2597 ata_dev_err(qc
->dev
, "error: { %s%s%s%s%s}\n",
2598 res
->feature
& ATA_ICRC
? "ICRC " : "",
2599 res
->feature
& ATA_UNC
? "UNC " : "",
2600 res
->feature
& ATA_AMNF
? "AMNF " : "",
2601 res
->feature
& ATA_IDNF
? "IDNF " : "",
2602 res
->feature
& ATA_ABORTED
? "ABRT " : "");
2608 * ata_eh_report - report error handling to user
2609 * @ap: ATA port to report EH about
2611 * Report EH to user.
2616 void ata_eh_report(struct ata_port
*ap
)
2618 struct ata_link
*link
;
2620 ata_for_each_link(link
, ap
, HOST_FIRST
)
2621 ata_eh_link_report(link
);
2624 static int ata_do_reset(struct ata_link
*link
, ata_reset_fn_t reset
,
2625 unsigned int *classes
, unsigned long deadline
,
2628 struct ata_device
*dev
;
2631 ata_for_each_dev(dev
, link
, ALL
)
2632 classes
[dev
->devno
] = ATA_DEV_UNKNOWN
;
2634 return reset(link
, classes
, deadline
);
2637 static int ata_eh_followup_srst_needed(struct ata_link
*link
, int rc
)
2639 if ((link
->flags
& ATA_LFLAG_NO_SRST
) || ata_link_offline(link
))
2643 if (sata_pmp_supported(link
->ap
) && ata_is_host_link(link
))
2648 int ata_eh_reset(struct ata_link
*link
, int classify
,
2649 ata_prereset_fn_t prereset
, ata_reset_fn_t softreset
,
2650 ata_reset_fn_t hardreset
, ata_postreset_fn_t postreset
)
2652 struct ata_port
*ap
= link
->ap
;
2653 struct ata_link
*slave
= ap
->slave_link
;
2654 struct ata_eh_context
*ehc
= &link
->eh_context
;
2655 struct ata_eh_context
*sehc
= slave
? &slave
->eh_context
: NULL
;
2656 unsigned int *classes
= ehc
->classes
;
2657 unsigned int lflags
= link
->flags
;
2658 int verbose
= !(ehc
->i
.flags
& ATA_EHI_QUIET
);
2659 int max_tries
= 0, try = 0;
2660 struct ata_link
*failed_link
;
2661 struct ata_device
*dev
;
2662 unsigned long deadline
, now
;
2663 ata_reset_fn_t reset
;
2664 unsigned long flags
;
2671 while (ata_eh_reset_timeouts
[max_tries
] != ULONG_MAX
)
2673 if (link
->flags
& ATA_LFLAG_RST_ONCE
)
2675 if (link
->flags
& ATA_LFLAG_NO_HRST
)
2677 if (link
->flags
& ATA_LFLAG_NO_SRST
)
2680 /* make sure each reset attempt is at least COOL_DOWN apart */
2681 if (ehc
->i
.flags
& ATA_EHI_DID_RESET
) {
2683 WARN_ON(time_after(ehc
->last_reset
, now
));
2684 deadline
= ata_deadline(ehc
->last_reset
,
2685 ATA_EH_RESET_COOL_DOWN
);
2686 if (time_before(now
, deadline
))
2687 schedule_timeout_uninterruptible(deadline
- now
);
2690 spin_lock_irqsave(ap
->lock
, flags
);
2691 ap
->pflags
|= ATA_PFLAG_RESETTING
;
2692 spin_unlock_irqrestore(ap
->lock
, flags
);
2694 ata_eh_about_to_do(link
, NULL
, ATA_EH_RESET
);
2696 ata_for_each_dev(dev
, link
, ALL
) {
2697 /* If we issue an SRST then an ATA drive (not ATAPI)
2698 * may change configuration and be in PIO0 timing. If
2699 * we do a hard reset (or are coming from power on)
2700 * this is true for ATA or ATAPI. Until we've set a
2701 * suitable controller mode we should not touch the
2702 * bus as we may be talking too fast.
2704 dev
->pio_mode
= XFER_PIO_0
;
2705 dev
->dma_mode
= 0xff;
2707 /* If the controller has a pio mode setup function
2708 * then use it to set the chipset to rights. Don't
2709 * touch the DMA setup as that will be dealt with when
2710 * configuring devices.
2712 if (ap
->ops
->set_piomode
)
2713 ap
->ops
->set_piomode(ap
, dev
);
2716 /* prefer hardreset */
2718 ehc
->i
.action
&= ~ATA_EH_RESET
;
2721 ehc
->i
.action
|= ATA_EH_HARDRESET
;
2722 } else if (softreset
) {
2724 ehc
->i
.action
|= ATA_EH_SOFTRESET
;
2728 unsigned long deadline
= ata_deadline(jiffies
,
2729 ATA_EH_PRERESET_TIMEOUT
);
2732 sehc
->i
.action
&= ~ATA_EH_RESET
;
2733 sehc
->i
.action
|= ehc
->i
.action
;
2736 rc
= prereset(link
, deadline
);
2738 /* If present, do prereset on slave link too. Reset
2739 * is skipped iff both master and slave links report
2740 * -ENOENT or clear ATA_EH_RESET.
2742 if (slave
&& (rc
== 0 || rc
== -ENOENT
)) {
2745 tmp
= prereset(slave
, deadline
);
2749 ehc
->i
.action
|= sehc
->i
.action
;
2753 if (rc
== -ENOENT
) {
2754 ata_link_dbg(link
, "port disabled--ignoring\n");
2755 ehc
->i
.action
&= ~ATA_EH_RESET
;
2757 ata_for_each_dev(dev
, link
, ALL
)
2758 classes
[dev
->devno
] = ATA_DEV_NONE
;
2763 "prereset failed (errno=%d)\n",
2768 /* prereset() might have cleared ATA_EH_RESET. If so,
2769 * bang classes, thaw and return.
2771 if (reset
&& !(ehc
->i
.action
& ATA_EH_RESET
)) {
2772 ata_for_each_dev(dev
, link
, ALL
)
2773 classes
[dev
->devno
] = ATA_DEV_NONE
;
2774 if ((ap
->pflags
& ATA_PFLAG_FROZEN
) &&
2775 ata_is_host_link(link
))
2776 ata_eh_thaw_port(ap
);
2786 if (ata_is_host_link(link
))
2787 ata_eh_freeze_port(ap
);
2789 deadline
= ata_deadline(jiffies
, ata_eh_reset_timeouts
[try++]);
2793 ata_link_info(link
, "%s resetting link\n",
2794 reset
== softreset
? "soft" : "hard");
2796 /* mark that this EH session started with reset */
2797 ehc
->last_reset
= jiffies
;
2798 if (reset
== hardreset
)
2799 ehc
->i
.flags
|= ATA_EHI_DID_HARDRESET
;
2801 ehc
->i
.flags
|= ATA_EHI_DID_SOFTRESET
;
2803 rc
= ata_do_reset(link
, reset
, classes
, deadline
, true);
2804 if (rc
&& rc
!= -EAGAIN
) {
2809 /* hardreset slave link if existent */
2810 if (slave
&& reset
== hardreset
) {
2814 ata_link_info(slave
, "hard resetting link\n");
2816 ata_eh_about_to_do(slave
, NULL
, ATA_EH_RESET
);
2817 tmp
= ata_do_reset(slave
, reset
, classes
, deadline
,
2825 failed_link
= slave
;
2831 /* perform follow-up SRST if necessary */
2832 if (reset
== hardreset
&&
2833 ata_eh_followup_srst_needed(link
, rc
)) {
2838 "follow-up softreset required but no softreset available\n");
2844 ata_eh_about_to_do(link
, NULL
, ATA_EH_RESET
);
2845 rc
= ata_do_reset(link
, reset
, classes
, deadline
, true);
2854 "no reset method available, skipping reset\n");
2855 if (!(lflags
& ATA_LFLAG_ASSUME_CLASS
))
2856 lflags
|= ATA_LFLAG_ASSUME_ATA
;
2860 * Post-reset processing
2862 ata_for_each_dev(dev
, link
, ALL
) {
2863 /* After the reset, the device state is PIO 0 and the
2864 * controller state is undefined. Reset also wakes up
2865 * drives from sleeping mode.
2867 dev
->pio_mode
= XFER_PIO_0
;
2868 dev
->flags
&= ~ATA_DFLAG_SLEEPING
;
2870 if (ata_phys_link_offline(ata_dev_phys_link(dev
)))
2873 /* apply class override */
2874 if (lflags
& ATA_LFLAG_ASSUME_ATA
)
2875 classes
[dev
->devno
] = ATA_DEV_ATA
;
2876 else if (lflags
& ATA_LFLAG_ASSUME_SEMB
)
2877 classes
[dev
->devno
] = ATA_DEV_SEMB_UNSUP
;
2880 /* record current link speed */
2881 if (sata_scr_read(link
, SCR_STATUS
, &sstatus
) == 0)
2882 link
->sata_spd
= (sstatus
>> 4) & 0xf;
2883 if (slave
&& sata_scr_read(slave
, SCR_STATUS
, &sstatus
) == 0)
2884 slave
->sata_spd
= (sstatus
>> 4) & 0xf;
2887 if (ata_is_host_link(link
))
2888 ata_eh_thaw_port(ap
);
2890 /* postreset() should clear hardware SError. Although SError
2891 * is cleared during link resume, clearing SError here is
2892 * necessary as some PHYs raise hotplug events after SRST.
2893 * This introduces race condition where hotplug occurs between
2894 * reset and here. This race is mediated by cross checking
2895 * link onlineness and classification result later.
2898 postreset(link
, classes
);
2900 postreset(slave
, classes
);
2904 * Some controllers can't be frozen very well and may set spurious
2905 * error conditions during reset. Clear accumulated error
2906 * information and re-thaw the port if frozen. As reset is the
2907 * final recovery action and we cross check link onlineness against
2908 * device classification later, no hotplug event is lost by this.
2910 spin_lock_irqsave(link
->ap
->lock
, flags
);
2911 memset(&link
->eh_info
, 0, sizeof(link
->eh_info
));
2913 memset(&slave
->eh_info
, 0, sizeof(link
->eh_info
));
2914 ap
->pflags
&= ~ATA_PFLAG_EH_PENDING
;
2915 spin_unlock_irqrestore(link
->ap
->lock
, flags
);
2917 if (ap
->pflags
& ATA_PFLAG_FROZEN
)
2918 ata_eh_thaw_port(ap
);
2921 * Make sure onlineness and classification result correspond.
2922 * Hotplug could have happened during reset and some
2923 * controllers fail to wait while a drive is spinning up after
2924 * being hotplugged causing misdetection. By cross checking
2925 * link on/offlineness and classification result, those
2926 * conditions can be reliably detected and retried.
2929 ata_for_each_dev(dev
, link
, ALL
) {
2930 if (ata_phys_link_online(ata_dev_phys_link(dev
))) {
2931 if (classes
[dev
->devno
] == ATA_DEV_UNKNOWN
) {
2932 ata_dev_dbg(dev
, "link online but device misclassified\n");
2933 classes
[dev
->devno
] = ATA_DEV_NONE
;
2936 } else if (ata_phys_link_offline(ata_dev_phys_link(dev
))) {
2937 if (ata_class_enabled(classes
[dev
->devno
]))
2939 "link offline, clearing class %d to NONE\n",
2940 classes
[dev
->devno
]);
2941 classes
[dev
->devno
] = ATA_DEV_NONE
;
2942 } else if (classes
[dev
->devno
] == ATA_DEV_UNKNOWN
) {
2944 "link status unknown, clearing UNKNOWN to NONE\n");
2945 classes
[dev
->devno
] = ATA_DEV_NONE
;
2949 if (classify
&& nr_unknown
) {
2950 if (try < max_tries
) {
2952 "link online but %d devices misclassified, retrying\n",
2959 "link online but %d devices misclassified, "
2960 "device detection might fail\n", nr_unknown
);
2963 /* reset successful, schedule revalidation */
2964 ata_eh_done(link
, NULL
, ATA_EH_RESET
);
2966 ata_eh_done(slave
, NULL
, ATA_EH_RESET
);
2967 ehc
->last_reset
= jiffies
; /* update to completion time */
2968 ehc
->i
.action
|= ATA_EH_REVALIDATE
;
2969 link
->lpm_policy
= ATA_LPM_UNKNOWN
; /* reset LPM state */
2973 /* clear hotplug flag */
2974 ehc
->i
.flags
&= ~ATA_EHI_HOTPLUGGED
;
2976 sehc
->i
.flags
&= ~ATA_EHI_HOTPLUGGED
;
2978 spin_lock_irqsave(ap
->lock
, flags
);
2979 ap
->pflags
&= ~ATA_PFLAG_RESETTING
;
2980 spin_unlock_irqrestore(ap
->lock
, flags
);
2985 /* if SCR isn't accessible on a fan-out port, PMP needs to be reset */
2986 if (!ata_is_host_link(link
) &&
2987 sata_scr_read(link
, SCR_STATUS
, &sstatus
))
2990 if (try >= max_tries
) {
2992 * Thaw host port even if reset failed, so that the port
2993 * can be retried on the next phy event. This risks
2994 * repeated EH runs but seems to be a better tradeoff than
2995 * shutting down a port after a botched hotplug attempt.
2997 if (ata_is_host_link(link
))
2998 ata_eh_thaw_port(ap
);
3003 if (time_before(now
, deadline
)) {
3004 unsigned long delta
= deadline
- now
;
3006 ata_link_warn(failed_link
,
3007 "reset failed (errno=%d), retrying in %u secs\n",
3008 rc
, DIV_ROUND_UP(jiffies_to_msecs(delta
), 1000));
3012 delta
= schedule_timeout_uninterruptible(delta
);
3017 * While disks spinup behind PMP, some controllers fail sending SRST.
3018 * They need to be reset - as well as the PMP - before retrying.
3020 if (rc
== -ERESTART
) {
3021 if (ata_is_host_link(link
))
3022 ata_eh_thaw_port(ap
);
3026 if (try == max_tries
- 1) {
3027 sata_down_spd_limit(link
, 0);
3029 sata_down_spd_limit(slave
, 0);
3030 } else if (rc
== -EPIPE
)
3031 sata_down_spd_limit(failed_link
, 0);
3038 static inline void ata_eh_pull_park_action(struct ata_port
*ap
)
3040 struct ata_link
*link
;
3041 struct ata_device
*dev
;
3042 unsigned long flags
;
3045 * This function can be thought of as an extended version of
3046 * ata_eh_about_to_do() specially crafted to accommodate the
3047 * requirements of ATA_EH_PARK handling. Since the EH thread
3048 * does not leave the do {} while () loop in ata_eh_recover as
3049 * long as the timeout for a park request to *one* device on
3050 * the port has not expired, and since we still want to pick
3051 * up park requests to other devices on the same port or
3052 * timeout updates for the same device, we have to pull
3053 * ATA_EH_PARK actions from eh_info into eh_context.i
3054 * ourselves at the beginning of each pass over the loop.
3056 * Additionally, all write accesses to &ap->park_req_pending
3057 * through reinit_completion() (see below) or complete_all()
3058 * (see ata_scsi_park_store()) are protected by the host lock.
3059 * As a result we have that park_req_pending.done is zero on
3060 * exit from this function, i.e. when ATA_EH_PARK actions for
3061 * *all* devices on port ap have been pulled into the
3062 * respective eh_context structs. If, and only if,
3063 * park_req_pending.done is non-zero by the time we reach
3064 * wait_for_completion_timeout(), another ATA_EH_PARK action
3065 * has been scheduled for at least one of the devices on port
3066 * ap and we have to cycle over the do {} while () loop in
3067 * ata_eh_recover() again.
3070 spin_lock_irqsave(ap
->lock
, flags
);
3071 reinit_completion(&ap
->park_req_pending
);
3072 ata_for_each_link(link
, ap
, EDGE
) {
3073 ata_for_each_dev(dev
, link
, ALL
) {
3074 struct ata_eh_info
*ehi
= &link
->eh_info
;
3076 link
->eh_context
.i
.dev_action
[dev
->devno
] |=
3077 ehi
->dev_action
[dev
->devno
] & ATA_EH_PARK
;
3078 ata_eh_clear_action(link
, dev
, ehi
, ATA_EH_PARK
);
3081 spin_unlock_irqrestore(ap
->lock
, flags
);
3084 static void ata_eh_park_issue_cmd(struct ata_device
*dev
, int park
)
3086 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3087 struct ata_taskfile tf
;
3088 unsigned int err_mask
;
3090 ata_tf_init(dev
, &tf
);
3092 ehc
->unloaded_mask
|= 1 << dev
->devno
;
3093 tf
.command
= ATA_CMD_IDLEIMMEDIATE
;
3099 ehc
->unloaded_mask
&= ~(1 << dev
->devno
);
3100 tf
.command
= ATA_CMD_CHK_POWER
;
3103 tf
.flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3104 tf
.protocol
= ATA_PROT_NODATA
;
3105 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
3106 if (park
&& (err_mask
|| tf
.lbal
!= 0xc4)) {
3107 ata_dev_err(dev
, "head unload failed!\n");
3108 ehc
->unloaded_mask
&= ~(1 << dev
->devno
);
3112 static int ata_eh_revalidate_and_attach(struct ata_link
*link
,
3113 struct ata_device
**r_failed_dev
)
3115 struct ata_port
*ap
= link
->ap
;
3116 struct ata_eh_context
*ehc
= &link
->eh_context
;
3117 struct ata_device
*dev
;
3118 unsigned int new_mask
= 0;
3119 unsigned long flags
;
3124 /* For PATA drive side cable detection to work, IDENTIFY must
3125 * be done backwards such that PDIAG- is released by the slave
3126 * device before the master device is identified.
3128 ata_for_each_dev(dev
, link
, ALL_REVERSE
) {
3129 unsigned int action
= ata_eh_dev_action(dev
);
3130 unsigned int readid_flags
= 0;
3132 if (ehc
->i
.flags
& ATA_EHI_DID_RESET
)
3133 readid_flags
|= ATA_READID_POSTRESET
;
3135 if ((action
& ATA_EH_REVALIDATE
) && ata_dev_enabled(dev
)) {
3136 WARN_ON(dev
->class == ATA_DEV_PMP
);
3138 if (ata_phys_link_offline(ata_dev_phys_link(dev
))) {
3143 ata_eh_about_to_do(link
, dev
, ATA_EH_REVALIDATE
);
3144 rc
= ata_dev_revalidate(dev
, ehc
->classes
[dev
->devno
],
3149 ata_eh_done(link
, dev
, ATA_EH_REVALIDATE
);
3151 /* Configuration may have changed, reconfigure
3154 ehc
->i
.flags
|= ATA_EHI_SETMODE
;
3156 /* schedule the scsi_rescan_device() here */
3157 schedule_work(&(ap
->scsi_rescan_task
));
3158 } else if (dev
->class == ATA_DEV_UNKNOWN
&&
3159 ehc
->tries
[dev
->devno
] &&
3160 ata_class_enabled(ehc
->classes
[dev
->devno
])) {
3161 /* Temporarily set dev->class, it will be
3162 * permanently set once all configurations are
3163 * complete. This is necessary because new
3164 * device configuration is done in two
3167 dev
->class = ehc
->classes
[dev
->devno
];
3169 if (dev
->class == ATA_DEV_PMP
)
3170 rc
= sata_pmp_attach(dev
);
3172 rc
= ata_dev_read_id(dev
, &dev
->class,
3173 readid_flags
, dev
->id
);
3175 /* read_id might have changed class, store and reset */
3176 ehc
->classes
[dev
->devno
] = dev
->class;
3177 dev
->class = ATA_DEV_UNKNOWN
;
3181 /* clear error info accumulated during probe */
3182 ata_ering_clear(&dev
->ering
);
3183 new_mask
|= 1 << dev
->devno
;
3186 /* IDENTIFY was issued to non-existent
3187 * device. No need to reset. Just
3188 * thaw and ignore the device.
3190 ata_eh_thaw_port(ap
);
3198 /* PDIAG- should have been released, ask cable type if post-reset */
3199 if ((ehc
->i
.flags
& ATA_EHI_DID_RESET
) && ata_is_host_link(link
)) {
3200 if (ap
->ops
->cable_detect
)
3201 ap
->cbl
= ap
->ops
->cable_detect(ap
);
3205 /* Configure new devices forward such that user doesn't see
3206 * device detection messages backwards.
3208 ata_for_each_dev(dev
, link
, ALL
) {
3209 if (!(new_mask
& (1 << dev
->devno
)))
3212 dev
->class = ehc
->classes
[dev
->devno
];
3214 if (dev
->class == ATA_DEV_PMP
)
3217 ehc
->i
.flags
|= ATA_EHI_PRINTINFO
;
3218 rc
= ata_dev_configure(dev
);
3219 ehc
->i
.flags
&= ~ATA_EHI_PRINTINFO
;
3221 dev
->class = ATA_DEV_UNKNOWN
;
3225 spin_lock_irqsave(ap
->lock
, flags
);
3226 ap
->pflags
|= ATA_PFLAG_SCSI_HOTPLUG
;
3227 spin_unlock_irqrestore(ap
->lock
, flags
);
3229 /* new device discovered, configure xfermode */
3230 ehc
->i
.flags
|= ATA_EHI_SETMODE
;
3236 *r_failed_dev
= dev
;
3237 DPRINTK("EXIT rc=%d\n", rc
);
3242 * ata_set_mode - Program timings and issue SET FEATURES - XFER
3243 * @link: link on which timings will be programmed
3244 * @r_failed_dev: out parameter for failed device
3246 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3247 * ata_set_mode() fails, pointer to the failing device is
3248 * returned in @r_failed_dev.
3251 * PCI/etc. bus probe sem.
3254 * 0 on success, negative errno otherwise
3256 int ata_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
)
3258 struct ata_port
*ap
= link
->ap
;
3259 struct ata_device
*dev
;
3262 /* if data transfer is verified, clear DUBIOUS_XFER on ering top */
3263 ata_for_each_dev(dev
, link
, ENABLED
) {
3264 if (!(dev
->flags
& ATA_DFLAG_DUBIOUS_XFER
)) {
3265 struct ata_ering_entry
*ent
;
3267 ent
= ata_ering_top(&dev
->ering
);
3269 ent
->eflags
&= ~ATA_EFLAG_DUBIOUS_XFER
;
3273 /* has private set_mode? */
3274 if (ap
->ops
->set_mode
)
3275 rc
= ap
->ops
->set_mode(link
, r_failed_dev
);
3277 rc
= ata_do_set_mode(link
, r_failed_dev
);
3279 /* if transfer mode has changed, set DUBIOUS_XFER on device */
3280 ata_for_each_dev(dev
, link
, ENABLED
) {
3281 struct ata_eh_context
*ehc
= &link
->eh_context
;
3282 u8 saved_xfer_mode
= ehc
->saved_xfer_mode
[dev
->devno
];
3283 u8 saved_ncq
= !!(ehc
->saved_ncq_enabled
& (1 << dev
->devno
));
3285 if (dev
->xfer_mode
!= saved_xfer_mode
||
3286 ata_ncq_enabled(dev
) != saved_ncq
)
3287 dev
->flags
|= ATA_DFLAG_DUBIOUS_XFER
;
3294 * atapi_eh_clear_ua - Clear ATAPI UNIT ATTENTION after reset
3295 * @dev: ATAPI device to clear UA for
3297 * Resets and other operations can make an ATAPI device raise
3298 * UNIT ATTENTION which causes the next operation to fail. This
3299 * function clears UA.
3302 * EH context (may sleep).
3305 * 0 on success, -errno on failure.
3307 static int atapi_eh_clear_ua(struct ata_device
*dev
)
3311 for (i
= 0; i
< ATA_EH_UA_TRIES
; i
++) {
3312 u8
*sense_buffer
= dev
->link
->ap
->sector_buf
;
3314 unsigned int err_mask
;
3316 err_mask
= atapi_eh_tur(dev
, &sense_key
);
3317 if (err_mask
!= 0 && err_mask
!= AC_ERR_DEV
) {
3319 "TEST_UNIT_READY failed (err_mask=0x%x)\n",
3324 if (!err_mask
|| sense_key
!= UNIT_ATTENTION
)
3327 err_mask
= atapi_eh_request_sense(dev
, sense_buffer
, sense_key
);
3329 ata_dev_warn(dev
, "failed to clear "
3330 "UNIT ATTENTION (err_mask=0x%x)\n", err_mask
);
3335 ata_dev_warn(dev
, "UNIT ATTENTION persists after %d tries\n",
3342 * ata_eh_maybe_retry_flush - Retry FLUSH if necessary
3343 * @dev: ATA device which may need FLUSH retry
3345 * If @dev failed FLUSH, it needs to be reported upper layer
3346 * immediately as it means that @dev failed to remap and already
3347 * lost at least a sector and further FLUSH retrials won't make
3348 * any difference to the lost sector. However, if FLUSH failed
3349 * for other reasons, for example transmission error, FLUSH needs
3352 * This function determines whether FLUSH failure retry is
3353 * necessary and performs it if so.
3356 * 0 if EH can continue, -errno if EH needs to be repeated.
3358 static int ata_eh_maybe_retry_flush(struct ata_device
*dev
)
3360 struct ata_link
*link
= dev
->link
;
3361 struct ata_port
*ap
= link
->ap
;
3362 struct ata_queued_cmd
*qc
;
3363 struct ata_taskfile tf
;
3364 unsigned int err_mask
;
3367 /* did flush fail for this device? */
3368 if (!ata_tag_valid(link
->active_tag
))
3371 qc
= __ata_qc_from_tag(ap
, link
->active_tag
);
3372 if (qc
->dev
!= dev
|| (qc
->tf
.command
!= ATA_CMD_FLUSH_EXT
&&
3373 qc
->tf
.command
!= ATA_CMD_FLUSH
))
3376 /* if the device failed it, it should be reported to upper layers */
3377 if (qc
->err_mask
& AC_ERR_DEV
)
3380 /* flush failed for some other reason, give it another shot */
3381 ata_tf_init(dev
, &tf
);
3383 tf
.command
= qc
->tf
.command
;
3384 tf
.flags
|= ATA_TFLAG_DEVICE
;
3385 tf
.protocol
= ATA_PROT_NODATA
;
3387 ata_dev_warn(dev
, "retrying FLUSH 0x%x Emask 0x%x\n",
3388 tf
.command
, qc
->err_mask
);
3390 err_mask
= ata_exec_internal(dev
, &tf
, NULL
, DMA_NONE
, NULL
, 0, 0);
3393 * FLUSH is complete but there's no way to
3394 * successfully complete a failed command from EH.
3395 * Making sure retry is allowed at least once and
3396 * retrying it should do the trick - whatever was in
3397 * the cache is already on the platter and this won't
3398 * cause infinite loop.
3400 qc
->scsicmd
->allowed
= max(qc
->scsicmd
->allowed
, 1);
3402 ata_dev_warn(dev
, "FLUSH failed Emask 0x%x\n",
3406 /* if device failed it, report it to upper layers */
3407 if (err_mask
& AC_ERR_DEV
) {
3408 qc
->err_mask
|= AC_ERR_DEV
;
3410 if (!(ap
->pflags
& ATA_PFLAG_FROZEN
))
3418 * ata_eh_set_lpm - configure SATA interface power management
3419 * @link: link to configure power management
3420 * @policy: the link power management policy
3421 * @r_failed_dev: out parameter for failed device
3423 * Enable SATA Interface power management. This will enable
3424 * Device Interface Power Management (DIPM) for min_power and
3425 * medium_power_with_dipm policies, and then call driver specific
3426 * callbacks for enabling Host Initiated Power management.
3432 * 0 on success, -errno on failure.
3434 static int ata_eh_set_lpm(struct ata_link
*link
, enum ata_lpm_policy policy
,
3435 struct ata_device
**r_failed_dev
)
3437 struct ata_port
*ap
= ata_is_host_link(link
) ? link
->ap
: NULL
;
3438 struct ata_eh_context
*ehc
= &link
->eh_context
;
3439 struct ata_device
*dev
, *link_dev
= NULL
, *lpm_dev
= NULL
;
3440 enum ata_lpm_policy old_policy
= link
->lpm_policy
;
3441 bool no_dipm
= link
->ap
->flags
& ATA_FLAG_NO_DIPM
;
3442 unsigned int hints
= ATA_LPM_EMPTY
| ATA_LPM_HIPM
;
3443 unsigned int err_mask
;
3446 /* if the link or host doesn't do LPM, noop */
3447 if ((link
->flags
& ATA_LFLAG_NO_LPM
) || (ap
&& !ap
->ops
->set_lpm
))
3451 * DIPM is enabled only for MIN_POWER as some devices
3452 * misbehave when the host NACKs transition to SLUMBER. Order
3453 * device and link configurations such that the host always
3454 * allows DIPM requests.
3456 ata_for_each_dev(dev
, link
, ENABLED
) {
3457 bool hipm
= ata_id_has_hipm(dev
->id
);
3458 bool dipm
= ata_id_has_dipm(dev
->id
) && !no_dipm
;
3460 /* find the first enabled and LPM enabled devices */
3464 if (!lpm_dev
&& (hipm
|| dipm
))
3467 hints
&= ~ATA_LPM_EMPTY
;
3469 hints
&= ~ATA_LPM_HIPM
;
3471 /* disable DIPM before changing link config */
3472 if (policy
< ATA_LPM_MED_POWER_WITH_DIPM
&& dipm
) {
3473 err_mask
= ata_dev_set_feature(dev
,
3474 SETFEATURES_SATA_DISABLE
, SATA_DIPM
);
3475 if (err_mask
&& err_mask
!= AC_ERR_DEV
) {
3477 "failed to disable DIPM, Emask 0x%x\n",
3486 rc
= ap
->ops
->set_lpm(link
, policy
, hints
);
3487 if (!rc
&& ap
->slave_link
)
3488 rc
= ap
->ops
->set_lpm(ap
->slave_link
, policy
, hints
);
3490 rc
= sata_pmp_set_lpm(link
, policy
, hints
);
3493 * Attribute link config failure to the first (LPM) enabled
3494 * device on the link.
3497 if (rc
== -EOPNOTSUPP
) {
3498 link
->flags
|= ATA_LFLAG_NO_LPM
;
3501 dev
= lpm_dev
? lpm_dev
: link_dev
;
3506 * Low level driver acked the transition. Issue DIPM command
3507 * with the new policy set.
3509 link
->lpm_policy
= policy
;
3510 if (ap
&& ap
->slave_link
)
3511 ap
->slave_link
->lpm_policy
= policy
;
3513 /* host config updated, enable DIPM if transitioning to MIN_POWER */
3514 ata_for_each_dev(dev
, link
, ENABLED
) {
3515 if (policy
>= ATA_LPM_MED_POWER_WITH_DIPM
&& !no_dipm
&&
3516 ata_id_has_dipm(dev
->id
)) {
3517 err_mask
= ata_dev_set_feature(dev
,
3518 SETFEATURES_SATA_ENABLE
, SATA_DIPM
);
3519 if (err_mask
&& err_mask
!= AC_ERR_DEV
) {
3521 "failed to enable DIPM, Emask 0x%x\n",
3529 link
->last_lpm_change
= jiffies
;
3530 link
->flags
|= ATA_LFLAG_CHANGED
;
3535 /* restore the old policy */
3536 link
->lpm_policy
= old_policy
;
3537 if (ap
&& ap
->slave_link
)
3538 ap
->slave_link
->lpm_policy
= old_policy
;
3540 /* if no device or only one more chance is left, disable LPM */
3541 if (!dev
|| ehc
->tries
[dev
->devno
] <= 2) {
3542 ata_link_warn(link
, "disabling LPM on the link\n");
3543 link
->flags
|= ATA_LFLAG_NO_LPM
;
3546 *r_failed_dev
= dev
;
3550 int ata_link_nr_enabled(struct ata_link
*link
)
3552 struct ata_device
*dev
;
3555 ata_for_each_dev(dev
, link
, ENABLED
)
3560 static int ata_link_nr_vacant(struct ata_link
*link
)
3562 struct ata_device
*dev
;
3565 ata_for_each_dev(dev
, link
, ALL
)
3566 if (dev
->class == ATA_DEV_UNKNOWN
)
3571 static int ata_eh_skip_recovery(struct ata_link
*link
)
3573 struct ata_port
*ap
= link
->ap
;
3574 struct ata_eh_context
*ehc
= &link
->eh_context
;
3575 struct ata_device
*dev
;
3577 /* skip disabled links */
3578 if (link
->flags
& ATA_LFLAG_DISABLED
)
3581 /* skip if explicitly requested */
3582 if (ehc
->i
.flags
& ATA_EHI_NO_RECOVERY
)
3585 /* thaw frozen port and recover failed devices */
3586 if ((ap
->pflags
& ATA_PFLAG_FROZEN
) || ata_link_nr_enabled(link
))
3589 /* reset at least once if reset is requested */
3590 if ((ehc
->i
.action
& ATA_EH_RESET
) &&
3591 !(ehc
->i
.flags
& ATA_EHI_DID_RESET
))
3594 /* skip if class codes for all vacant slots are ATA_DEV_NONE */
3595 ata_for_each_dev(dev
, link
, ALL
) {
3596 if (dev
->class == ATA_DEV_UNKNOWN
&&
3597 ehc
->classes
[dev
->devno
] != ATA_DEV_NONE
)
3604 static int ata_count_probe_trials_cb(struct ata_ering_entry
*ent
, void *void_arg
)
3606 u64 interval
= msecs_to_jiffies(ATA_EH_PROBE_TRIAL_INTERVAL
);
3607 u64 now
= get_jiffies_64();
3608 int *trials
= void_arg
;
3610 if ((ent
->eflags
& ATA_EFLAG_OLD_ER
) ||
3611 (ent
->timestamp
< now
- min(now
, interval
)))
3618 static int ata_eh_schedule_probe(struct ata_device
*dev
)
3620 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3621 struct ata_link
*link
= ata_dev_phys_link(dev
);
3624 if (!(ehc
->i
.probe_mask
& (1 << dev
->devno
)) ||
3625 (ehc
->did_probe_mask
& (1 << dev
->devno
)))
3628 ata_eh_detach_dev(dev
);
3630 ehc
->did_probe_mask
|= (1 << dev
->devno
);
3631 ehc
->i
.action
|= ATA_EH_RESET
;
3632 ehc
->saved_xfer_mode
[dev
->devno
] = 0;
3633 ehc
->saved_ncq_enabled
&= ~(1 << dev
->devno
);
3635 /* the link maybe in a deep sleep, wake it up */
3636 if (link
->lpm_policy
> ATA_LPM_MAX_POWER
) {
3637 if (ata_is_host_link(link
))
3638 link
->ap
->ops
->set_lpm(link
, ATA_LPM_MAX_POWER
,
3641 sata_pmp_set_lpm(link
, ATA_LPM_MAX_POWER
,
3645 /* Record and count probe trials on the ering. The specific
3646 * error mask used is irrelevant. Because a successful device
3647 * detection clears the ering, this count accumulates only if
3648 * there are consecutive failed probes.
3650 * If the count is equal to or higher than ATA_EH_PROBE_TRIALS
3651 * in the last ATA_EH_PROBE_TRIAL_INTERVAL, link speed is
3652 * forced to 1.5Gbps.
3654 * This is to work around cases where failed link speed
3655 * negotiation results in device misdetection leading to
3656 * infinite DEVXCHG or PHRDY CHG events.
3658 ata_ering_record(&dev
->ering
, 0, AC_ERR_OTHER
);
3659 ata_ering_map(&dev
->ering
, ata_count_probe_trials_cb
, &trials
);
3661 if (trials
> ATA_EH_PROBE_TRIALS
)
3662 sata_down_spd_limit(link
, 1);
3667 static int ata_eh_handle_dev_fail(struct ata_device
*dev
, int err
)
3669 struct ata_eh_context
*ehc
= &dev
->link
->eh_context
;
3671 /* -EAGAIN from EH routine indicates retry without prejudice.
3672 * The requester is responsible for ensuring forward progress.
3675 ehc
->tries
[dev
->devno
]--;
3679 /* device missing or wrong IDENTIFY data, schedule probing */
3680 ehc
->i
.probe_mask
|= (1 << dev
->devno
);
3683 /* give it just one more chance */
3684 ehc
->tries
[dev
->devno
] = min(ehc
->tries
[dev
->devno
], 1);
3687 if (ehc
->tries
[dev
->devno
] == 1) {
3688 /* This is the last chance, better to slow
3689 * down than lose it.
3691 sata_down_spd_limit(ata_dev_phys_link(dev
), 0);
3692 if (dev
->pio_mode
> XFER_PIO_0
)
3693 ata_down_xfermask_limit(dev
, ATA_DNXFER_PIO
);
3697 if (ata_dev_enabled(dev
) && !ehc
->tries
[dev
->devno
]) {
3698 /* disable device if it has used up all its chances */
3699 ata_dev_disable(dev
);
3701 /* detach if offline */
3702 if (ata_phys_link_offline(ata_dev_phys_link(dev
)))
3703 ata_eh_detach_dev(dev
);
3705 /* schedule probe if necessary */
3706 if (ata_eh_schedule_probe(dev
)) {
3707 ehc
->tries
[dev
->devno
] = ATA_EH_DEV_TRIES
;
3708 memset(ehc
->cmd_timeout_idx
[dev
->devno
], 0,
3709 sizeof(ehc
->cmd_timeout_idx
[dev
->devno
]));
3714 ehc
->i
.action
|= ATA_EH_RESET
;
3720 * ata_eh_recover - recover host port after error
3721 * @ap: host port to recover
3722 * @prereset: prereset method (can be NULL)
3723 * @softreset: softreset method (can be NULL)
3724 * @hardreset: hardreset method (can be NULL)
3725 * @postreset: postreset method (can be NULL)
3726 * @r_failed_link: out parameter for failed link
3728 * This is the alpha and omega, eum and yang, heart and soul of
3729 * libata exception handling. On entry, actions required to
3730 * recover each link and hotplug requests are recorded in the
3731 * link's eh_context. This function executes all the operations
3732 * with appropriate retrials and fallbacks to resurrect failed
3733 * devices, detach goners and greet newcomers.
3736 * Kernel thread context (may sleep).
3739 * 0 on success, -errno on failure.
3741 int ata_eh_recover(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
3742 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
3743 ata_postreset_fn_t postreset
,
3744 struct ata_link
**r_failed_link
)
3746 struct ata_link
*link
;
3747 struct ata_device
*dev
;
3749 unsigned long flags
, deadline
;
3753 /* prep for recovery */
3754 ata_for_each_link(link
, ap
, EDGE
) {
3755 struct ata_eh_context
*ehc
= &link
->eh_context
;
3757 /* re-enable link? */
3758 if (ehc
->i
.action
& ATA_EH_ENABLE_LINK
) {
3759 ata_eh_about_to_do(link
, NULL
, ATA_EH_ENABLE_LINK
);
3760 spin_lock_irqsave(ap
->lock
, flags
);
3761 link
->flags
&= ~ATA_LFLAG_DISABLED
;
3762 spin_unlock_irqrestore(ap
->lock
, flags
);
3763 ata_eh_done(link
, NULL
, ATA_EH_ENABLE_LINK
);
3766 ata_for_each_dev(dev
, link
, ALL
) {
3767 if (link
->flags
& ATA_LFLAG_NO_RETRY
)
3768 ehc
->tries
[dev
->devno
] = 1;
3770 ehc
->tries
[dev
->devno
] = ATA_EH_DEV_TRIES
;
3772 /* collect port action mask recorded in dev actions */
3773 ehc
->i
.action
|= ehc
->i
.dev_action
[dev
->devno
] &
3774 ~ATA_EH_PERDEV_MASK
;
3775 ehc
->i
.dev_action
[dev
->devno
] &= ATA_EH_PERDEV_MASK
;
3777 /* process hotplug request */
3778 if (dev
->flags
& ATA_DFLAG_DETACH
)
3779 ata_eh_detach_dev(dev
);
3781 /* schedule probe if necessary */
3782 if (!ata_dev_enabled(dev
))
3783 ata_eh_schedule_probe(dev
);
3790 /* if UNLOADING, finish immediately */
3791 if (ap
->pflags
& ATA_PFLAG_UNLOADING
)
3795 ata_for_each_link(link
, ap
, EDGE
) {
3796 struct ata_eh_context
*ehc
= &link
->eh_context
;
3798 /* skip EH if possible. */
3799 if (ata_eh_skip_recovery(link
))
3802 ata_for_each_dev(dev
, link
, ALL
)
3803 ehc
->classes
[dev
->devno
] = ATA_DEV_UNKNOWN
;
3807 ata_for_each_link(link
, ap
, EDGE
) {
3808 struct ata_eh_context
*ehc
= &link
->eh_context
;
3810 if (!(ehc
->i
.action
& ATA_EH_RESET
))
3813 rc
= ata_eh_reset(link
, ata_link_nr_vacant(link
),
3814 prereset
, softreset
, hardreset
, postreset
);
3816 ata_link_err(link
, "reset failed, giving up\n");
3825 * clears ATA_EH_PARK in eh_info and resets
3826 * ap->park_req_pending
3828 ata_eh_pull_park_action(ap
);
3831 ata_for_each_link(link
, ap
, EDGE
) {
3832 ata_for_each_dev(dev
, link
, ALL
) {
3833 struct ata_eh_context
*ehc
= &link
->eh_context
;
3836 if (dev
->class != ATA_DEV_ATA
&&
3837 dev
->class != ATA_DEV_ZAC
)
3839 if (!(ehc
->i
.dev_action
[dev
->devno
] &
3842 tmp
= dev
->unpark_deadline
;
3843 if (time_before(deadline
, tmp
))
3845 else if (time_before_eq(tmp
, jiffies
))
3847 if (ehc
->unloaded_mask
& (1 << dev
->devno
))
3850 ata_eh_park_issue_cmd(dev
, 1);
3855 if (time_before_eq(deadline
, now
))
3859 deadline
= wait_for_completion_timeout(&ap
->park_req_pending
,
3863 ata_for_each_link(link
, ap
, EDGE
) {
3864 ata_for_each_dev(dev
, link
, ALL
) {
3865 if (!(link
->eh_context
.unloaded_mask
&
3869 ata_eh_park_issue_cmd(dev
, 0);
3870 ata_eh_done(link
, dev
, ATA_EH_PARK
);
3876 ata_for_each_link(link
, ap
, PMP_FIRST
) {
3877 struct ata_eh_context
*ehc
= &link
->eh_context
;
3879 if (sata_pmp_attached(ap
) && ata_is_host_link(link
))
3882 /* revalidate existing devices and attach new ones */
3883 rc
= ata_eh_revalidate_and_attach(link
, &dev
);
3887 /* if PMP got attached, return, pmp EH will take care of it */
3888 if (link
->device
->class == ATA_DEV_PMP
) {
3893 /* configure transfer mode if necessary */
3894 if (ehc
->i
.flags
& ATA_EHI_SETMODE
) {
3895 rc
= ata_set_mode(link
, &dev
);
3898 ehc
->i
.flags
&= ~ATA_EHI_SETMODE
;
3901 /* If reset has been issued, clear UA to avoid
3902 * disrupting the current users of the device.
3904 if (ehc
->i
.flags
& ATA_EHI_DID_RESET
) {
3905 ata_for_each_dev(dev
, link
, ALL
) {
3906 if (dev
->class != ATA_DEV_ATAPI
)
3908 rc
= atapi_eh_clear_ua(dev
);
3911 if (zpodd_dev_enabled(dev
))
3912 zpodd_post_poweron(dev
);
3916 /* retry flush if necessary */
3917 ata_for_each_dev(dev
, link
, ALL
) {
3918 if (dev
->class != ATA_DEV_ATA
&&
3919 dev
->class != ATA_DEV_ZAC
)
3921 rc
= ata_eh_maybe_retry_flush(dev
);
3927 /* configure link power saving */
3928 if (link
->lpm_policy
!= ap
->target_lpm_policy
) {
3929 rc
= ata_eh_set_lpm(link
, ap
->target_lpm_policy
, &dev
);
3934 /* this link is okay now */
3941 ata_eh_handle_dev_fail(dev
, rc
);
3943 if (ap
->pflags
& ATA_PFLAG_FROZEN
) {
3944 /* PMP reset requires working host port.
3945 * Can't retry if it's frozen.
3947 if (sata_pmp_attached(ap
))
3957 if (rc
&& r_failed_link
)
3958 *r_failed_link
= link
;
3960 DPRINTK("EXIT, rc=%d\n", rc
);
3965 * ata_eh_finish - finish up EH
3966 * @ap: host port to finish EH for
3968 * Recovery is complete. Clean up EH states and retry or finish
3974 void ata_eh_finish(struct ata_port
*ap
)
3976 struct ata_queued_cmd
*qc
;
3979 /* retry or finish qcs */
3980 ata_qc_for_each_raw(ap
, qc
, tag
) {
3981 if (!(qc
->flags
& ATA_QCFLAG_FAILED
))
3985 /* FIXME: Once EH migration is complete,
3986 * generate sense data in this function,
3987 * considering both err_mask and tf.
3989 if (qc
->flags
& ATA_QCFLAG_RETRY
)
3990 ata_eh_qc_retry(qc
);
3992 ata_eh_qc_complete(qc
);
3994 if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
) {
3995 ata_eh_qc_complete(qc
);
3997 /* feed zero TF to sense generation */
3998 memset(&qc
->result_tf
, 0, sizeof(qc
->result_tf
));
3999 ata_eh_qc_retry(qc
);
4004 /* make sure nr_active_links is zero after EH */
4005 WARN_ON(ap
->nr_active_links
);
4006 ap
->nr_active_links
= 0;
4010 * ata_do_eh - do standard error handling
4011 * @ap: host port to handle error for
4013 * @prereset: prereset method (can be NULL)
4014 * @softreset: softreset method (can be NULL)
4015 * @hardreset: hardreset method (can be NULL)
4016 * @postreset: postreset method (can be NULL)
4018 * Perform standard error handling sequence.
4021 * Kernel thread context (may sleep).
4023 void ata_do_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
4024 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
4025 ata_postreset_fn_t postreset
)
4027 struct ata_device
*dev
;
4033 rc
= ata_eh_recover(ap
, prereset
, softreset
, hardreset
, postreset
,
4036 ata_for_each_dev(dev
, &ap
->link
, ALL
)
4037 ata_dev_disable(dev
);
4044 * ata_std_error_handler - standard error handler
4045 * @ap: host port to handle error for
4047 * Standard error handler
4050 * Kernel thread context (may sleep).
4052 void ata_std_error_handler(struct ata_port
*ap
)
4054 struct ata_port_operations
*ops
= ap
->ops
;
4055 ata_reset_fn_t hardreset
= ops
->hardreset
;
4057 /* ignore built-in hardreset if SCR access is not available */
4058 if (hardreset
== sata_std_hardreset
&& !sata_scr_valid(&ap
->link
))
4061 ata_do_eh(ap
, ops
->prereset
, ops
->softreset
, hardreset
, ops
->postreset
);
4066 * ata_eh_handle_port_suspend - perform port suspend operation
4067 * @ap: port to suspend
4072 * Kernel thread context (may sleep).
4074 static void ata_eh_handle_port_suspend(struct ata_port
*ap
)
4076 unsigned long flags
;
4078 struct ata_device
*dev
;
4080 /* are we suspending? */
4081 spin_lock_irqsave(ap
->lock
, flags
);
4082 if (!(ap
->pflags
& ATA_PFLAG_PM_PENDING
) ||
4083 ap
->pm_mesg
.event
& PM_EVENT_RESUME
) {
4084 spin_unlock_irqrestore(ap
->lock
, flags
);
4087 spin_unlock_irqrestore(ap
->lock
, flags
);
4089 WARN_ON(ap
->pflags
& ATA_PFLAG_SUSPENDED
);
4092 * If we have a ZPODD attached, check its zero
4093 * power ready status before the port is frozen.
4094 * Only needed for runtime suspend.
4096 if (PMSG_IS_AUTO(ap
->pm_mesg
)) {
4097 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
4098 if (zpodd_dev_enabled(dev
))
4099 zpodd_on_suspend(dev
);
4103 /* tell ACPI we're suspending */
4104 rc
= ata_acpi_on_suspend(ap
);
4109 ata_eh_freeze_port(ap
);
4111 if (ap
->ops
->port_suspend
)
4112 rc
= ap
->ops
->port_suspend(ap
, ap
->pm_mesg
);
4114 ata_acpi_set_state(ap
, ap
->pm_mesg
);
4116 /* update the flags */
4117 spin_lock_irqsave(ap
->lock
, flags
);
4119 ap
->pflags
&= ~ATA_PFLAG_PM_PENDING
;
4121 ap
->pflags
|= ATA_PFLAG_SUSPENDED
;
4122 else if (ap
->pflags
& ATA_PFLAG_FROZEN
)
4123 ata_port_schedule_eh(ap
);
4125 spin_unlock_irqrestore(ap
->lock
, flags
);
4131 * ata_eh_handle_port_resume - perform port resume operation
4132 * @ap: port to resume
4137 * Kernel thread context (may sleep).
4139 static void ata_eh_handle_port_resume(struct ata_port
*ap
)
4141 struct ata_link
*link
;
4142 struct ata_device
*dev
;
4143 unsigned long flags
;
4145 /* are we resuming? */
4146 spin_lock_irqsave(ap
->lock
, flags
);
4147 if (!(ap
->pflags
& ATA_PFLAG_PM_PENDING
) ||
4148 !(ap
->pm_mesg
.event
& PM_EVENT_RESUME
)) {
4149 spin_unlock_irqrestore(ap
->lock
, flags
);
4152 spin_unlock_irqrestore(ap
->lock
, flags
);
4154 WARN_ON(!(ap
->pflags
& ATA_PFLAG_SUSPENDED
));
4157 * Error timestamps are in jiffies which doesn't run while
4158 * suspended and PHY events during resume isn't too uncommon.
4159 * When the two are combined, it can lead to unnecessary speed
4160 * downs if the machine is suspended and resumed repeatedly.
4161 * Clear error history.
4163 ata_for_each_link(link
, ap
, HOST_FIRST
)
4164 ata_for_each_dev(dev
, link
, ALL
)
4165 ata_ering_clear(&dev
->ering
);
4167 ata_acpi_set_state(ap
, ap
->pm_mesg
);
4169 if (ap
->ops
->port_resume
)
4170 ap
->ops
->port_resume(ap
);
4172 /* tell ACPI that we're resuming */
4173 ata_acpi_on_resume(ap
);
4175 /* update the flags */
4176 spin_lock_irqsave(ap
->lock
, flags
);
4177 ap
->pflags
&= ~(ATA_PFLAG_PM_PENDING
| ATA_PFLAG_SUSPENDED
);
4178 spin_unlock_irqrestore(ap
->lock
, flags
);
4180 #endif /* CONFIG_PM */