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isci: Terminate dev requests on FIS err bit rx in NCQ 

When the remote device transitions to a not-ready state because of
an NCQ error condition, all outstanding requests to that device
are terminated and completed to libsas on the normal path.  The
device then waits for a READ LOG EXT command to issue on the task
management path.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Jeff Skirvin 2011-06-23 17:09:02 -07:00 committed by Dan Williams
parent 4cffe13e0d
commit 9274f45ea5
5 changed files with 73 additions and 7 deletions
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27
drivers/scsi/isci/remote_device.c
View File

@ -68,17 +68,39 @@
* @isci_host: This parameter specifies the isci host object.
* @isci_device: This parameter specifies the remote device
*
* scic_lock is held on entrance to this function.
*/
static void isci_remote_device_not_ready(struct isci_host *ihost,
struct isci_remote_device *idev, u32 reason)
{
struct isci_request * ireq;
dev_dbg(&ihost->pdev->dev,
"%s: isci_device = %p\n", __func__, idev);
if (reason == SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED)
switch (reason) {
case SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED:
set_bit(IDEV_GONE, &idev->flags);
else
break;
case SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED:
set_bit(IDEV_IO_NCQERROR, &idev->flags);
/* Kill all outstanding requests for the device. */
list_for_each_entry(ireq, &idev->reqs_in_process, dev_node) {
dev_dbg(&ihost->pdev->dev,
"%s: isci_device = %p request = %p\n",
__func__, idev, ireq);
scic_controller_terminate_request(&ihost->sci,
&idev->sci,
&ireq->sci);
}
/* Fall through into the default case... */
default:
clear_bit(IDEV_IO_READY, &idev->flags);
break;
}
}
/**
@ -94,6 +116,7 @@ static void isci_remote_device_ready(struct isci_host *ihost, struct isci_remote
dev_dbg(&ihost->pdev->dev,
"%s: idev = %p\n", __func__, idev);
clear_bit(IDEV_IO_NCQERROR, &idev->flags);
set_bit(IDEV_IO_READY, &idev->flags);
if (test_and_clear_bit(IDEV_START_PENDING, &idev->flags))
wake_up(&ihost->eventq);

1
drivers/scsi/isci/remote_device.h
View File

@ -136,6 +136,7 @@ struct isci_remote_device {
#define IDEV_EH 3
#define IDEV_GONE 4
#define IDEV_IO_READY 5
#define IDEV_IO_NCQERROR 6
unsigned long flags;
struct kref kref;
struct isci_port *isci_port;

27
drivers/scsi/isci/request.c
View File

@ -3587,9 +3587,30 @@ int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *ide
spin_lock_irqsave(&ihost->scic_lock, flags);
/* send the request, let the core assign the IO TAG. */
status = scic_controller_start_io(&ihost->sci, &idev->sci, &ireq->sci,
SCI_CONTROLLER_INVALID_IO_TAG);
if (test_bit(IDEV_IO_NCQERROR, &idev->flags)) {
if (isci_task_is_ncq_recovery(task)) {
/* The device is in an NCQ recovery state. Issue the
* request on the task side. Note that it will
* complete on the I/O request side because the
* request was built that way (ie.
* ireq->is_task_management_request is false).
*/
status = scic_controller_start_task(&ihost->sci,
&idev->sci,
&ireq->sci,
SCI_CONTROLLER_INVALID_IO_TAG);
} else {
status = SCI_FAILURE;
}
} else {
/* send the request, let the core assign the IO TAG. */
status = scic_controller_start_io(&ihost->sci, &idev->sci,
&ireq->sci,
SCI_CONTROLLER_INVALID_IO_TAG);
}
if (status != SCI_SUCCESS &&
status != SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
dev_warn(&ihost->pdev->dev,

9
drivers/scsi/isci/request.h
View File

@ -687,4 +687,13 @@ scic_task_request_construct_sata(struct scic_sds_request *sci_req);
void
scic_stp_io_request_set_ncq_tag(struct scic_sds_request *sci_req, u16 ncq_tag);
void scic_sds_smp_request_copy_response(struct scic_sds_request *sci_req);
static inline int isci_task_is_ncq_recovery(struct sas_task *task)
{
return (sas_protocol_ata(task->task_proto) &&
task->ata_task.fis.command == ATA_CMD_READ_LOG_EXT &&
task->ata_task.fis.lbal == ATA_LOG_SATA_NCQ);
}
#endif /* !defined(_ISCI_REQUEST_H_) */

16
drivers/scsi/isci/task.c
View File

@ -133,6 +133,15 @@ static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task,
for (; num > 0; num--,\
task = list_entry(task->list.next, struct sas_task, list))
static inline int isci_device_io_ready(struct isci_remote_device *idev,
struct sas_task *task)
{
return idev ? test_bit(IDEV_IO_READY, &idev->flags) ||
(test_bit(IDEV_IO_NCQERROR, &idev->flags) &&
isci_task_is_ncq_recovery(task))
: 0;
}
/**
* isci_task_execute_task() - This function is one of the SAS Domain Template
* functions. This function is called by libsas to send a task down to
@ -165,7 +174,7 @@ int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags)
for_each_sas_task(num, task) {
spin_lock_irqsave(&ihost->scic_lock, flags);
idev = isci_lookup_device(task->dev);
io_ready = idev ? test_bit(IDEV_IO_READY, &idev->flags) : 0;
io_ready = isci_device_io_ready(idev, task);
spin_unlock_irqrestore(&ihost->scic_lock, flags);
dev_dbg(&ihost->pdev->dev,
@ -178,6 +187,7 @@ int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags)
SAS_DEVICE_UNKNOWN);
isci_host_can_dequeue(ihost, 1);
} else if (!io_ready) {
/* Indicate QUEUE_FULL so that the scsi midlayer
* retries.
*/
@ -299,7 +309,9 @@ int isci_task_execute_tmf(struct isci_host *ihost,
/* sanity check, return TMF_RESP_FUNC_FAILED
* if the device is not there and ready.
*/
if (!isci_device || !test_bit(IDEV_IO_READY, &isci_device->flags)) {
if (!isci_device ||
(!test_bit(IDEV_IO_READY, &isci_device->flags) &&
!test_bit(IDEV_IO_NCQERROR, &isci_device->flags))) {
dev_dbg(&ihost->pdev->dev,
"%s: isci_device = %p not ready (%#lx)\n",
__func__,