2 * Support for SATA devices on Serial Attached SCSI (SAS) controllers
4 * Copyright (C) 2006 IBM Corporation
6 * Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
24 #include <linux/scatterlist.h>
25 #include <linux/slab.h>
27 #include <scsi/sas_ata.h>
28 #include "sas_internal.h"
29 #include <scsi/scsi_host.h>
30 #include <scsi/scsi_device.h>
31 #include <scsi/scsi_tcq.h>
32 #include <scsi/scsi.h>
33 #include <scsi/scsi_transport.h>
34 #include <scsi/scsi_transport_sas.h>
35 #include "../scsi_sas_internal.h"
36 #include "../scsi_transport_api.h"
37 #include <scsi/scsi_eh.h>
39 static enum ata_completion_errors
sas_to_ata_err(struct task_status_struct
*ts
)
41 /* Cheesy attempt to translate SAS errors into ATA. Hah! */
44 if (ts
->resp
== SAS_TASK_UNDELIVERED
)
45 return AC_ERR_ATA_BUS
;
47 /* ts->resp == SAS_TASK_COMPLETE */
48 /* task delivered, what happened afterwards? */
50 case SAS_DEV_NO_RESPONSE
:
51 return AC_ERR_TIMEOUT
;
56 return AC_ERR_ATA_BUS
;
59 case SAS_DATA_UNDERRUN
:
61 * Some programs that use the taskfile interface
62 * (smartctl in particular) can cause underrun
63 * problems. Ignore these errors, perhaps at our
68 case SAS_DATA_OVERRUN
:
70 case SAS_DEVICE_UNKNOWN
:
72 return AC_ERR_INVALID
;
74 case SAM_STAT_CHECK_CONDITION
:
77 SAS_DPRINTK("%s: Saw error %d. What to do?\n",
81 case SAS_ABORTED_TASK
:
84 case SAS_PROTO_RESPONSE
:
85 /* This means the ending_fis has the error
86 * value; return 0 here to collect it */
93 static void sas_ata_task_done(struct sas_task
*task
)
95 struct ata_queued_cmd
*qc
= task
->uldd_task
;
96 struct domain_device
*dev
;
97 struct task_status_struct
*stat
= &task
->task_status
;
98 struct ata_task_resp
*resp
= (struct ata_task_resp
*)stat
->buf
;
99 struct sas_ha_struct
*sas_ha
;
100 enum ata_completion_errors ac
;
104 goto qc_already_gone
;
106 dev
= qc
->ap
->private_data
;
107 sas_ha
= dev
->port
->ha
;
109 spin_lock_irqsave(dev
->sata_dev
.ap
->lock
, flags
);
110 if (stat
->stat
== SAS_PROTO_RESPONSE
|| stat
->stat
== SAM_STAT_GOOD
) {
111 ata_tf_from_fis(resp
->ending_fis
, &dev
->sata_dev
.tf
);
112 qc
->err_mask
|= ac_err_mask(dev
->sata_dev
.tf
.command
);
113 dev
->sata_dev
.sstatus
= resp
->sstatus
;
114 dev
->sata_dev
.serror
= resp
->serror
;
115 dev
->sata_dev
.scontrol
= resp
->scontrol
;
116 } else if (stat
->stat
!= SAM_STAT_GOOD
) {
117 ac
= sas_to_ata_err(stat
);
119 SAS_DPRINTK("%s: SAS error %x\n", __func__
,
121 /* We saw a SAS error. Send a vague error. */
123 dev
->sata_dev
.tf
.feature
= 0x04; /* status err */
124 dev
->sata_dev
.tf
.command
= ATA_ERR
;
128 qc
->lldd_task
= NULL
;
130 ASSIGN_SAS_TASK(qc
->scsicmd
, NULL
);
132 spin_unlock_irqrestore(dev
->sata_dev
.ap
->lock
, flags
);
135 * If the sas_task has an ata qc, a scsi_cmnd and the aborted
136 * flag is set, then we must have come in via the libsas EH
137 * functions. When we exit this function, we need to put the
138 * scsi_cmnd on the list of finished errors. The ata_qc_complete
139 * call cleans up the libata side of things but we're protected
140 * from the scsi_cmnd going away because the scsi_cmnd is owned
141 * by the EH, making libata's call to scsi_done a NOP.
143 spin_lock_irqsave(&task
->task_state_lock
, flags
);
144 if (qc
->scsicmd
&& task
->task_state_flags
& SAS_TASK_STATE_ABORTED
)
145 scsi_eh_finish_cmd(qc
->scsicmd
, &sas_ha
->eh_done_q
);
146 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
149 list_del_init(&task
->list
);
153 static unsigned int sas_ata_qc_issue(struct ata_queued_cmd
*qc
)
156 struct sas_task
*task
;
157 struct domain_device
*dev
= qc
->ap
->private_data
;
158 struct sas_ha_struct
*sas_ha
= dev
->port
->ha
;
159 struct Scsi_Host
*host
= sas_ha
->core
.shost
;
160 struct sas_internal
*i
= to_sas_internal(host
->transportt
);
161 struct scatterlist
*sg
;
162 unsigned int xfer
= 0;
165 /* If the device fell off, no sense in issuing commands */
167 return AC_ERR_SYSTEM
;
169 task
= sas_alloc_task(GFP_ATOMIC
);
171 return AC_ERR_SYSTEM
;
173 task
->task_proto
= SAS_PROTOCOL_STP
;
174 task
->task_done
= sas_ata_task_done
;
176 if (qc
->tf
.command
== ATA_CMD_FPDMA_WRITE
||
177 qc
->tf
.command
== ATA_CMD_FPDMA_READ
) {
178 /* Need to zero out the tag libata assigned us */
182 ata_tf_to_fis(&qc
->tf
, 1, 0, (u8
*)&task
->ata_task
.fis
);
183 task
->uldd_task
= qc
;
184 if (ata_is_atapi(qc
->tf
.protocol
)) {
185 memcpy(task
->ata_task
.atapi_packet
, qc
->cdb
, qc
->dev
->cdb_len
);
186 task
->total_xfer_len
= qc
->nbytes
;
187 task
->num_scatter
= qc
->n_elem
;
189 for_each_sg(qc
->sg
, sg
, qc
->n_elem
, si
)
192 task
->total_xfer_len
= xfer
;
193 task
->num_scatter
= si
;
196 task
->data_dir
= qc
->dma_dir
;
197 task
->scatter
= qc
->sg
;
198 task
->ata_task
.retry_count
= 1;
199 task
->task_state_flags
= SAS_TASK_STATE_PENDING
;
200 qc
->lldd_task
= task
;
202 switch (qc
->tf
.protocol
) {
204 task
->ata_task
.use_ncq
= 1;
208 task
->ata_task
.dma_xfer
= 1;
213 ASSIGN_SAS_TASK(qc
->scsicmd
, task
);
215 if (sas_ha
->lldd_max_execute_num
< 2)
216 res
= i
->dft
->lldd_execute_task(task
, 1, GFP_ATOMIC
);
218 res
= sas_queue_up(task
);
222 SAS_DPRINTK("lldd_execute_task returned: %d\n", res
);
225 ASSIGN_SAS_TASK(qc
->scsicmd
, NULL
);
227 return AC_ERR_SYSTEM
;
233 static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd
*qc
)
235 struct domain_device
*dev
= qc
->ap
->private_data
;
237 memcpy(&qc
->result_tf
, &dev
->sata_dev
.tf
, sizeof(qc
->result_tf
));
241 static int sas_ata_hard_reset(struct ata_link
*link
, unsigned int *class,
242 unsigned long deadline
)
244 struct ata_port
*ap
= link
->ap
;
245 struct domain_device
*dev
= ap
->private_data
;
246 struct sas_internal
*i
=
247 to_sas_internal(dev
->port
->ha
->core
.shost
->transportt
);
248 int res
= TMF_RESP_FUNC_FAILED
;
251 if (i
->dft
->lldd_I_T_nexus_reset
)
252 res
= i
->dft
->lldd_I_T_nexus_reset(dev
);
254 if (res
!= TMF_RESP_FUNC_COMPLETE
) {
255 SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __func__
);
259 switch (dev
->sata_dev
.command_set
) {
260 case ATA_COMMAND_SET
:
261 SAS_DPRINTK("%s: Found ATA device.\n", __func__
);
262 *class = ATA_DEV_ATA
;
264 case ATAPI_COMMAND_SET
:
265 SAS_DPRINTK("%s: Found ATAPI device.\n", __func__
);
266 *class = ATA_DEV_ATAPI
;
269 SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
271 dev
->sata_dev
.command_set
);
272 *class = ATA_DEV_UNKNOWN
;
276 ap
->cbl
= ATA_CBL_SATA
;
280 static void sas_ata_post_internal(struct ata_queued_cmd
*qc
)
282 if (qc
->flags
& ATA_QCFLAG_FAILED
)
283 qc
->err_mask
|= AC_ERR_OTHER
;
287 * Find the sas_task and kill it. By this point,
288 * libata has decided to kill the qc, so we needn't
289 * bother with sas_ata_task_done. But we still
290 * ought to abort the task.
292 struct sas_task
*task
= qc
->lldd_task
;
295 qc
->lldd_task
= NULL
;
297 /* Should this be a AT(API) device reset? */
298 spin_lock_irqsave(&task
->task_state_lock
, flags
);
299 task
->task_state_flags
|= SAS_TASK_NEED_DEV_RESET
;
300 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
302 task
->uldd_task
= NULL
;
303 __sas_task_abort(task
);
308 static int sas_ata_scr_write(struct ata_link
*link
, unsigned int sc_reg_in
,
311 struct domain_device
*dev
= link
->ap
->private_data
;
313 SAS_DPRINTK("STUB %s\n", __func__
);
316 dev
->sata_dev
.sstatus
= val
;
319 dev
->sata_dev
.scontrol
= val
;
322 dev
->sata_dev
.serror
= val
;
325 dev
->sata_dev
.ap
->link
.sactive
= val
;
333 static int sas_ata_scr_read(struct ata_link
*link
, unsigned int sc_reg_in
,
336 struct domain_device
*dev
= link
->ap
->private_data
;
338 SAS_DPRINTK("STUB %s\n", __func__
);
341 *val
= dev
->sata_dev
.sstatus
;
344 *val
= dev
->sata_dev
.scontrol
;
347 *val
= dev
->sata_dev
.serror
;
350 *val
= dev
->sata_dev
.ap
->link
.sactive
;
357 static struct ata_port_operations sas_sata_ops
= {
358 .prereset
= ata_std_prereset
,
360 .hardreset
= sas_ata_hard_reset
,
361 .postreset
= ata_std_postreset
,
362 .error_handler
= ata_std_error_handler
,
363 .post_internal_cmd
= sas_ata_post_internal
,
364 .qc_defer
= ata_std_qc_defer
,
365 .qc_prep
= ata_noop_qc_prep
,
366 .qc_issue
= sas_ata_qc_issue
,
367 .qc_fill_rtf
= sas_ata_qc_fill_rtf
,
368 .port_start
= ata_sas_port_start
,
369 .port_stop
= ata_sas_port_stop
,
370 .scr_read
= sas_ata_scr_read
,
371 .scr_write
= sas_ata_scr_write
374 static struct ata_port_info sata_port_info
= {
375 .flags
= ATA_FLAG_SATA
| ATA_FLAG_NO_LEGACY
| ATA_FLAG_PIO_DMA
|
377 .pio_mask
= ATA_PIO4
,
378 .mwdma_mask
= ATA_MWDMA2
,
379 .udma_mask
= ATA_UDMA6
,
380 .port_ops
= &sas_sata_ops
383 int sas_ata_init_host_and_port(struct domain_device
*found_dev
,
384 struct scsi_target
*starget
)
386 struct Scsi_Host
*shost
= dev_to_shost(&starget
->dev
);
387 struct sas_ha_struct
*ha
= SHOST_TO_SAS_HA(shost
);
390 ata_host_init(&found_dev
->sata_dev
.ata_host
,
392 sata_port_info
.flags
,
394 ap
= ata_sas_port_alloc(&found_dev
->sata_dev
.ata_host
,
398 SAS_DPRINTK("ata_sas_port_alloc failed.\n");
402 ap
->private_data
= found_dev
;
403 ap
->cbl
= ATA_CBL_SATA
;
404 ap
->scsi_host
= shost
;
405 found_dev
->sata_dev
.ap
= ap
;
410 void sas_ata_task_abort(struct sas_task
*task
)
412 struct ata_queued_cmd
*qc
= task
->uldd_task
;
413 struct completion
*waiting
;
415 /* Bounce SCSI-initiated commands to the SCSI EH */
417 struct request_queue
*q
= qc
->scsicmd
->device
->request_queue
;
420 spin_lock_irqsave(q
->queue_lock
, flags
);
421 blk_abort_request(qc
->scsicmd
->request
);
422 spin_unlock_irqrestore(q
->queue_lock
, flags
);
423 scsi_schedule_eh(qc
->scsicmd
->device
->host
);
427 /* Internal command, fake a timeout and complete. */
428 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
429 qc
->flags
|= ATA_QCFLAG_FAILED
;
430 qc
->err_mask
|= AC_ERR_TIMEOUT
;
431 waiting
= qc
->private_data
;
435 static void sas_task_timedout(unsigned long _task
)
437 struct sas_task
*task
= (void *) _task
;
440 spin_lock_irqsave(&task
->task_state_lock
, flags
);
441 if (!(task
->task_state_flags
& SAS_TASK_STATE_DONE
))
442 task
->task_state_flags
|= SAS_TASK_STATE_ABORTED
;
443 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
445 complete(&task
->completion
);
448 static void sas_disc_task_done(struct sas_task
*task
)
450 if (!del_timer(&task
->timer
))
452 complete(&task
->completion
);
455 #define SAS_DEV_TIMEOUT 10
458 * sas_execute_task -- Basic task processing for discovery
459 * @task: the task to be executed
460 * @buffer: pointer to buffer to do I/O
461 * @size: size of @buffer
462 * @dma_dir: DMA direction. DMA_xxx
464 static int sas_execute_task(struct sas_task
*task
, void *buffer
, int size
,
465 enum dma_data_direction dma_dir
)
468 struct scatterlist
*scatter
= NULL
;
469 struct task_status_struct
*ts
= &task
->task_status
;
472 struct sas_internal
*i
=
473 to_sas_internal(task
->dev
->port
->ha
->core
.shost
->transportt
);
475 if (dma_dir
!= DMA_NONE
) {
476 scatter
= kzalloc(sizeof(*scatter
), GFP_KERNEL
);
480 sg_init_one(scatter
, buffer
, size
);
484 task
->task_proto
= task
->dev
->tproto
;
485 task
->scatter
= scatter
;
486 task
->num_scatter
= num_scatter
;
487 task
->total_xfer_len
= size
;
488 task
->data_dir
= dma_dir
;
489 task
->task_done
= sas_disc_task_done
;
490 if (dma_dir
!= DMA_NONE
&&
491 sas_protocol_ata(task
->task_proto
)) {
492 task
->num_scatter
= dma_map_sg(task
->dev
->port
->ha
->dev
,
498 for (retries
= 0; retries
< 5; retries
++) {
499 task
->task_state_flags
= SAS_TASK_STATE_PENDING
;
500 init_completion(&task
->completion
);
502 task
->timer
.data
= (unsigned long) task
;
503 task
->timer
.function
= sas_task_timedout
;
504 task
->timer
.expires
= jiffies
+ SAS_DEV_TIMEOUT
*HZ
;
505 add_timer(&task
->timer
);
507 res
= i
->dft
->lldd_execute_task(task
, 1, GFP_KERNEL
);
509 del_timer(&task
->timer
);
510 SAS_DPRINTK("executing SAS discovery task failed:%d\n",
514 wait_for_completion(&task
->completion
);
516 if (task
->task_state_flags
& SAS_TASK_STATE_ABORTED
) {
518 SAS_DPRINTK("task aborted, flags:0x%x\n",
519 task
->task_state_flags
);
520 res2
= i
->dft
->lldd_abort_task(task
);
521 SAS_DPRINTK("came back from abort task\n");
522 if (!(task
->task_state_flags
& SAS_TASK_STATE_DONE
)) {
523 if (res2
== TMF_RESP_FUNC_COMPLETE
)
524 continue; /* Retry the task */
529 if (task
->task_status
.stat
== SAM_STAT_BUSY
||
530 task
->task_status
.stat
== SAM_STAT_TASK_SET_FULL
||
531 task
->task_status
.stat
== SAS_QUEUE_FULL
) {
532 SAS_DPRINTK("task: q busy, sleeping...\n");
533 schedule_timeout_interruptible(HZ
);
534 } else if (task
->task_status
.stat
== SAM_STAT_CHECK_CONDITION
) {
535 struct scsi_sense_hdr shdr
;
537 if (!scsi_normalize_sense(ts
->buf
, ts
->buf_valid_size
,
539 SAS_DPRINTK("couldn't normalize sense\n");
542 if ((shdr
.sense_key
== 6 && shdr
.asc
== 0x29) ||
543 (shdr
.sense_key
== 2 && shdr
.asc
== 4 &&
545 SAS_DPRINTK("device %016llx LUN: %016llx "
546 "powering up or not ready yet, "
548 SAS_ADDR(task
->dev
->sas_addr
),
549 SAS_ADDR(task
->ssp_task
.LUN
));
551 schedule_timeout_interruptible(5*HZ
);
552 } else if (shdr
.sense_key
== 1) {
555 } else if (shdr
.sense_key
== 5) {
558 SAS_DPRINTK("dev %016llx LUN: %016llx "
559 "sense key:0x%x ASC:0x%x ASCQ:0x%x"
561 SAS_ADDR(task
->dev
->sas_addr
),
562 SAS_ADDR(task
->ssp_task
.LUN
),
564 shdr
.asc
, shdr
.ascq
);
566 } else if (task
->task_status
.resp
!= SAS_TASK_COMPLETE
||
567 task
->task_status
.stat
!= SAM_STAT_GOOD
) {
568 SAS_DPRINTK("task finished with resp:0x%x, "
570 task
->task_status
.resp
,
571 task
->task_status
.stat
);
579 if (dma_dir
!= DMA_NONE
) {
580 if (sas_protocol_ata(task
->task_proto
))
581 dma_unmap_sg(task
->dev
->port
->ha
->dev
,
582 task
->scatter
, task
->num_scatter
,
590 /* ---------- SATA ---------- */
592 static void sas_get_ata_command_set(struct domain_device
*dev
)
594 struct dev_to_host_fis
*fis
=
595 (struct dev_to_host_fis
*) dev
->frame_rcvd
;
597 if ((fis
->sector_count
== 1 && /* ATA */
603 (fis
->sector_count
== 0 && /* CE-ATA (mATA) */
607 (fis
->device
& ~0x10) == 0))
609 dev
->sata_dev
.command_set
= ATA_COMMAND_SET
;
611 else if ((fis
->interrupt_reason
== 1 && /* ATAPI */
613 fis
->byte_count_low
== 0x14 &&
614 fis
->byte_count_high
== 0xEB &&
615 (fis
->device
& ~0x10) == 0))
617 dev
->sata_dev
.command_set
= ATAPI_COMMAND_SET
;
619 else if ((fis
->sector_count
== 1 && /* SEMB */
625 (fis
->interrupt_reason
== 1 && /* SATA PM */
627 fis
->byte_count_low
== 0x69 &&
628 fis
->byte_count_high
== 0x96 &&
629 (fis
->device
& ~0x10) == 0))
631 /* Treat it as a superset? */
632 dev
->sata_dev
.command_set
= ATAPI_COMMAND_SET
;
636 * sas_issue_ata_cmd -- Basic SATA command processing for discovery
637 * @dev: the device to send the command to
638 * @command: the command register
639 * @features: the features register
640 * @buffer: pointer to buffer to do I/O
641 * @size: size of @buffer
642 * @dma_dir: DMA direction. DMA_xxx
644 static int sas_issue_ata_cmd(struct domain_device
*dev
, u8 command
,
645 u8 features
, void *buffer
, int size
,
646 enum dma_data_direction dma_dir
)
649 struct sas_task
*task
;
650 struct dev_to_host_fis
*d2h_fis
= (struct dev_to_host_fis
*)
654 task
= sas_alloc_task(GFP_KERNEL
);
660 task
->ata_task
.fis
.fis_type
= 0x27;
661 task
->ata_task
.fis
.command
= command
;
662 task
->ata_task
.fis
.features
= features
;
663 task
->ata_task
.fis
.device
= d2h_fis
->device
;
664 task
->ata_task
.retry_count
= 1;
666 res
= sas_execute_task(task
, buffer
, size
, dma_dir
);
673 #define ATA_IDENTIFY_DEV 0xEC
674 #define ATA_IDENTIFY_PACKET_DEV 0xA1
675 #define ATA_SET_FEATURES 0xEF
676 #define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07
679 * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV)
680 * @dev: STP/SATA device of interest (ATA/ATAPI)
682 * The LLDD has already been notified of this device, so that we can
683 * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY
684 * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its
685 * performance for this device.
687 static int sas_discover_sata_dev(struct domain_device
*dev
)
693 identify_x
= kzalloc(512, GFP_KERNEL
);
697 if (dev
->sata_dev
.command_set
== ATA_COMMAND_SET
) {
698 dev
->sata_dev
.identify_device
= identify_x
;
699 command
= ATA_IDENTIFY_DEV
;
701 dev
->sata_dev
.identify_packet_device
= identify_x
;
702 command
= ATA_IDENTIFY_PACKET_DEV
;
705 res
= sas_issue_ata_cmd(dev
, command
, 0, identify_x
, 512,
710 /* lives on the media? */
711 if (le16_to_cpu(identify_x
[0]) & 4) {
712 /* incomplete response */
713 SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to "
714 "dev %llx\n", SAS_ADDR(dev
->sas_addr
));
715 if (!(identify_x
[83] & cpu_to_le16(1<<6)))
717 res
= sas_issue_ata_cmd(dev
, ATA_SET_FEATURES
,
718 ATA_FEATURE_PUP_STBY_SPIN_UP
,
723 schedule_timeout_interruptible(5*HZ
); /* More time? */
724 res
= sas_issue_ata_cmd(dev
, command
, 0, identify_x
, 512,
730 /* XXX Hint: register this SATA device with SATL.
731 When this returns, dev->sata_dev->lu is alive and
733 sas_satl_register_dev(dev);
736 sas_fill_in_rphy(dev
, dev
->rphy
);
740 dev
->sata_dev
.identify_packet_device
= NULL
;
741 dev
->sata_dev
.identify_device
= NULL
;
746 static int sas_discover_sata_pm(struct domain_device
*dev
)
752 * sas_discover_sata -- discover an STP/SATA domain device
753 * @dev: pointer to struct domain_device of interest
755 * First we notify the LLDD of this device, so we can send frames to
756 * it. Then depending on the type of device we call the appropriate
757 * discover functions. Once device discover is done, we notify the
758 * LLDD so that it can fine-tune its parameters for the device, by
759 * removing it and then adding it. That is, the second time around,
760 * the driver would have certain fields, that it is looking at, set.
761 * Finally we initialize the kobj so that the device can be added to
762 * the system at registration time. Devices directly attached to a HA
763 * port, have no parents. All other devices do, and should have their
764 * "parent" pointer set appropriately before calling this function.
766 int sas_discover_sata(struct domain_device
*dev
)
770 sas_get_ata_command_set(dev
);
772 res
= sas_notify_lldd_dev_found(dev
);
776 switch (dev
->dev_type
) {
778 res
= sas_discover_sata_dev(dev
);
781 res
= sas_discover_sata_pm(dev
);
786 sas_notify_lldd_dev_gone(dev
);
788 sas_notify_lldd_dev_found(dev
);
789 res
= sas_rphy_add(dev
->rphy
);
795 void sas_ata_strategy_handler(struct Scsi_Host
*shost
)
797 struct scsi_device
*sdev
;
799 shost_for_each_device(sdev
, shost
) {
800 struct domain_device
*ddev
= sdev_to_domain_dev(sdev
);
801 struct ata_port
*ap
= ddev
->sata_dev
.ap
;
803 if (!dev_is_sata(ddev
))
806 ata_port_printk(ap
, KERN_DEBUG
, "sas eh calling libata port error handler");
807 ata_scsi_port_error_handler(shost
, ap
);
811 int sas_ata_timed_out(struct scsi_cmnd
*cmd
, struct sas_task
*task
,
812 enum blk_eh_timer_return
*rtn
)
814 struct domain_device
*ddev
= cmd_to_domain_dev(cmd
);
816 if (!dev_is_sata(ddev
) || task
)
819 /* we're a sata device with no task, so this must be a libata
820 * eh timeout. Ideally should hook into libata timeout
821 * handling, but there's no point, it just wants to activate
823 *rtn
= BLK_EH_NOT_HANDLED
;
827 int sas_ata_eh(struct Scsi_Host
*shost
, struct list_head
*work_q
,
828 struct list_head
*done_q
)
831 struct scsi_cmnd
*cmd
, *n
;
839 list_for_each_entry_safe(cmd
, n
, work_q
, eh_entry
) {
840 struct domain_device
*ddev
= cmd_to_domain_dev(cmd
);
842 if (!dev_is_sata(ddev
) || TO_SAS_TASK(cmd
))
844 if(ap
&& ap
!= ddev
->sata_dev
.ap
)
846 ap
= ddev
->sata_dev
.ap
;
848 list_move(&cmd
->eh_entry
, &sata_q
);
851 if (!list_empty(&sata_q
)) {
852 ata_port_printk(ap
, KERN_DEBUG
,"sas eh calling libata cmd error handler\n");
853 ata_scsi_cmd_error_handler(shost
, ap
, &sata_q
);