Commit 3a2755af authored by Darrick J. Wong's avatar Darrick J. Wong Committed by James Bottomley

[SCSI] sas_ata: Implement sas_task_abort for ATA devices

ATA devices need special handling for sas_task_abort.  If the ATA command
came from SCSI, then we merely need to tell SCSI to abort the scsi_cmnd.
However, internal commands require a bit more work--we need to fill the qc
with the appropriate error status and complete the command, and eventually
post_internal will issue the actual ABORT TASK.
Signed-off-by: 's avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent fe059f12
......@@ -30,6 +30,8 @@
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_sas.h>
#include "../scsi_sas_internal.h"
#include "../scsi_transport_api.h"
#include <scsi/scsi_eh.h>
static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
{
......@@ -91,6 +93,7 @@ static void sas_ata_task_done(struct sas_task *task)
struct domain_device *dev;
struct task_status_struct *stat = &task->task_status;
struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
struct sas_ha_struct *sas_ha;
enum ata_completion_errors ac;
unsigned long flags;
......@@ -98,6 +101,7 @@ static void sas_ata_task_done(struct sas_task *task)
goto qc_already_gone;
dev = qc->ap->private_data;
sas_ha = dev->port->ha;
spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_GOOD) {
......@@ -124,6 +128,20 @@ static void sas_ata_task_done(struct sas_task *task)
ata_qc_complete(qc);
spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);
/*
* If the sas_task has an ata qc, a scsi_cmnd and the aborted
* flag is set, then we must have come in via the libsas EH
* functions. When we exit this function, we need to put the
* scsi_cmnd on the list of finished errors. The ata_qc_complete
* call cleans up the libata side of things but we're protected
* from the scsi_cmnd going away because the scsi_cmnd is owned
* by the EH, making libata's call to scsi_done a NOP.
*/
spin_lock_irqsave(&task->task_state_lock, flags);
if (qc->scsicmd && task->task_state_flags & SAS_TASK_STATE_ABORTED)
scsi_eh_finish_cmd(qc->scsicmd, &sas_ha->eh_done_q);
spin_unlock_irqrestore(&task->task_state_lock, flags);
qc_already_gone:
list_del_init(&task->list);
sas_free_task(task);
......@@ -259,15 +277,18 @@ static void sas_ata_post_internal(struct ata_queued_cmd *qc)
* ought to abort the task.
*/
struct sas_task *task = qc->lldd_task;
struct domain_device *dev = qc->ap->private_data;
unsigned long flags;
qc->lldd_task = NULL;
if (task) {
/* Should this be a AT(API) device reset? */
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
spin_unlock_irqrestore(&task->task_state_lock, flags);
task->uldd_task = NULL;
__sas_task_abort(task);
}
sas_phy_reset(dev->port->phy, 1);
}
}
......@@ -369,3 +390,23 @@ int sas_ata_init_host_and_port(struct domain_device *found_dev,
return 0;
}
void sas_ata_task_abort(struct sas_task *task)
{
struct ata_queued_cmd *qc = task->uldd_task;
struct completion *waiting;
/* Bounce SCSI-initiated commands to the SCSI EH */
if (qc->scsicmd) {
scsi_req_abort_cmd(qc->scsicmd);
scsi_schedule_eh(qc->scsicmd->device->host);
return;
}
/* Internal command, fake a timeout and complete. */
qc->flags &= ~ATA_QCFLAG_ACTIVE;
qc->flags |= ATA_QCFLAG_FAILED;
qc->err_mask |= AC_ERR_TIMEOUT;
waiting = qc->private_data;
complete(waiting);
}
......@@ -39,6 +39,9 @@
#define SAS_DPRINTK(fmt, ...)
#endif
#define TO_SAS_TASK(_scsi_cmd) ((void *)(_scsi_cmd)->host_scribble)
#define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)
void sas_scsi_recover_host(struct Scsi_Host *shost);
int sas_show_class(enum sas_class class, char *buf);
......
......@@ -47,9 +47,6 @@
/* ---------- SCSI Host glue ---------- */
#define TO_SAS_TASK(_scsi_cmd) ((void *)(_scsi_cmd)->host_scribble)
#define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)
static void sas_scsi_task_done(struct sas_task *task)
{
struct task_status_struct *ts = &task->task_status;
......@@ -1018,6 +1015,11 @@ void sas_task_abort(struct sas_task *task)
return;
}
if (dev_is_sata(task->dev)) {
sas_ata_task_abort(task);
return;
}
scsi_req_abort_cmd(sc);
scsi_schedule_eh(sc->device->host);
}
......
......@@ -36,4 +36,6 @@ static inline int dev_is_sata(struct domain_device *dev)
int sas_ata_init_host_and_port(struct domain_device *found_dev,
struct scsi_target *starget);
void sas_ata_task_abort(struct sas_task *task);
#endif /* _SAS_ATA_H_ */
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