scsi: libsas: Add sas_abort_task()

Add a generic implementation of abort task TMF handler, and use in LLDDs.

With that, some LLDDs custom TMF functions can now be deleted.

Link: https://lore.kernel.org/r/1645112566-115804-18-git-send-email-john.garry@huawei.com
Tested-by: Yihang Li <liyihang6@hisilicon.com>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 1 insertions, 117 deletions

diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index 63a96c307e3c..a6867dae0e7c 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -1254,114 +1254,6 @@ void mvs_dev_gone(struct domain_device *dev)
 	mvs_dev_gone_notify(dev);
 }
 
-static void mvs_task_done(struct sas_task *task)
-{
-	if (!del_timer(&task->slow_task->timer))
-		return;
-	complete(&task->slow_task->completion);
-}
-
-static void mvs_tmf_timedout(struct timer_list *t)
-{
-	struct sas_task_slow *slow = from_timer(slow, t, timer);
-	struct sas_task *task = slow->task;
-
-	task->task_state_flags |= SAS_TASK_STATE_ABORTED;
-	complete(&task->slow_task->completion);
-}
-
-#define MVS_TASK_TIMEOUT 20
-static int mvs_exec_internal_tmf_task(struct domain_device *dev,
-			void *parameter, u32 para_len, struct sas_tmf_task *tmf)
-{
-	int res, retry;
-	struct sas_task *task = NULL;
-
-	for (retry = 0; retry < 3; retry++) {
-		task = sas_alloc_slow_task(GFP_KERNEL);
-		if (!task)
-			return -ENOMEM;
-
-		task->dev = dev;
-		task->task_proto = dev->tproto;
-
-		memcpy(&task->ssp_task, parameter, para_len);
-		task->task_done = mvs_task_done;
-
-		task->slow_task->timer.function = mvs_tmf_timedout;
-		task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ;
-		add_timer(&task->slow_task->timer);
-
-		task->tmf = tmf;
-
-		res = mvs_queue_command(task, GFP_KERNEL);
-
-		if (res) {
-			del_timer(&task->slow_task->timer);
-			mv_printk("executing internal task failed:%d\n", res);
-			goto ex_err;
-		}
-
-		wait_for_completion(&task->slow_task->completion);
-		res = TMF_RESP_FUNC_FAILED;
-		/* Even TMF timed out, return direct. */
-		if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
-			if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
-				mv_printk("TMF task[%x] timeout.\n", tmf->tmf);
-				goto ex_err;
-			}
-		}
-
-		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-		    task->task_status.stat == SAS_SAM_STAT_GOOD) {
-			res = TMF_RESP_FUNC_COMPLETE;
-			break;
-		}
-
-		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-		      task->task_status.stat == SAS_DATA_UNDERRUN) {
-			/* no error, but return the number of bytes of
-			 * underrun */
-			res = task->task_status.residual;
-			break;
-		}
-
-		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-		      task->task_status.stat == SAS_DATA_OVERRUN) {
-			mv_dprintk("blocked task error.\n");
-			res = -EMSGSIZE;
-			break;
-		} else {
-			mv_dprintk(" task to dev %016llx response: 0x%x "
-				    "status 0x%x\n",
-				    SAS_ADDR(dev->sas_addr),
-				    task->task_status.resp,
-				    task->task_status.stat);
-			sas_free_task(task);
-			task = NULL;
-
-		}
-	}
-ex_err:
-	BUG_ON(retry == 3 && task != NULL);
-	sas_free_task(task);
-	return res;
-}
-
-static int mvs_debug_issue_ssp_tmf(struct domain_device *dev,
-				u8 *lun, struct sas_tmf_task *tmf)
-{
-	struct sas_ssp_task ssp_task;
-	if (!(dev->tproto & SAS_PROTOCOL_SSP))
-		return TMF_RESP_FUNC_ESUPP;
-
-	memcpy(ssp_task.LUN, lun, 8);
-
-	return mvs_exec_internal_tmf_task(dev, &ssp_task,
-				sizeof(ssp_task), tmf);
-}
-
-
 /*  Standard mandates link reset for ATA  (type 0)
     and hard reset for SSP (type 1) , only for RECOVERY */
 static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
@@ -1452,8 +1344,6 @@ int mvs_query_task(struct sas_task *task)
 /*  mandatory SAM-3, still need free task/slot info */
 int mvs_abort_task(struct sas_task *task)
 {
-	struct scsi_lun lun;
-	struct sas_tmf_task tmf_task;
 	struct domain_device *dev = task->dev;
 	struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
 	struct mvs_info *mvi;
@@ -1477,9 +1367,6 @@ int mvs_abort_task(struct sas_task *task)
 	spin_unlock_irqrestore(&task->task_state_lock, flags);
 	mvi_dev->dev_status = MVS_DEV_EH;
 	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
-		struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
-
-		int_to_scsilun(cmnd->device->lun, &lun);
 		rc = mvs_find_tag(mvi, task, &tag);
 		if (rc == 0) {
 			mv_printk("No such tag in %s\n", __func__);
@@ -1487,10 +1374,7 @@ int mvs_abort_task(struct sas_task *task)
 			return rc;
 		}
 
-		tmf_task.tmf = TMF_ABORT_TASK;
-		tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
-
-		rc = mvs_debug_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
+		rc = sas_abort_task(task, tag);
 
 		/* if successful, clear the task and callback forwards.*/
 		if (rc == TMF_RESP_FUNC_COMPLETE) {