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

[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: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent fe059f12

drivers/scsi/libsas/sas_ata.c

+44 −3
Original line number Diff line number Diff line
@@ -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);

}

drivers/scsi/libsas/sas_internal.h

+3 −0
Original line number Diff line number Diff line
@@ -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);

drivers/scsi/libsas/sas_scsi_host.c

+5 −3
Original line number Diff line number Diff line
@@ -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);

}

include/scsi/sas_ata.h

+2 −0
Original line number Diff line number Diff line
@@ -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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