scsi: libsas: Add sas_clear_task_set()

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

Link: https://lore.kernel.org/r/1645112566-115804-15-git-send-email-john.garry@huawei.comTested-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>

drivers/scsi/hisi_sas/hisi_sas_main.c

@@ -690,7 +690,6 @@ static int hisi_sas_init_device(struct domain_device *device)
 {
 	int rc = TMF_RESP_FUNC_COMPLETE;
 	struct scsi_lun lun;
-	struct sas_tmf_task tmf_task;
 	int retry = HISI_SAS_DISK_RECOVER_CNT;
 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 	struct device *dev = hisi_hba->dev;
@@ -700,10 +699,8 @@ static int hisi_sas_init_device(struct domain_device *device)
 	case SAS_END_DEVICE:
 		int_to_scsilun(0, &lun);
 
-		tmf_task.tmf = TMF_CLEAR_TASK_SET;
 		while (retry-- > 0) {
-			rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
-							  &tmf_task);
+			rc = sas_clear_task_set(device, lun.scsi_lun);
 			if (rc == TMF_RESP_FUNC_COMPLETE) {
 				hisi_sas_release_task(hisi_hba, device);
 				break;

drivers/scsi/libsas/sas_scsi_host.c

@@ -1053,6 +1053,16 @@ int sas_abort_task_set(struct domain_device *dev, u8 *lun)
 }
 EXPORT_SYMBOL_GPL(sas_abort_task_set);
 
+int sas_clear_task_set(struct domain_device *dev, u8 *lun)
+{
+	struct sas_tmf_task tmf_task = {
+		.tmf = TMF_CLEAR_TASK_SET,
+	};
+
+	return sas_execute_ssp_tmf(dev, lun, &tmf_task);
+}
+EXPORT_SYMBOL_GPL(sas_clear_task_set);
+
 /*
  * Tell an upper layer that it needs to initiate an abort for a given task.
  * This should only ever be called by an LLDD.

drivers/scsi/mvsas/mv_init.c

@@ -64,7 +64,7 @@ static struct sas_domain_function_template mvs_transport_ops = {
 
 	.lldd_abort_task	= mvs_abort_task,
 	.lldd_abort_task_set    = sas_abort_task_set,
-	.lldd_clear_task_set    = mvs_clear_task_set,
+	.lldd_clear_task_set    = sas_clear_task_set,
 	.lldd_I_T_nexus_reset	= mvs_I_T_nexus_reset,
 	.lldd_lu_reset 		= mvs_lu_reset,
 	.lldd_query_task	= mvs_query_task,

drivers/scsi/mvsas/mv_sas.c

@@ -1536,17 +1536,6 @@ int mvs_abort_task(struct sas_task *task)
 	return rc;
 }
 
-int mvs_clear_task_set(struct domain_device *dev, u8 *lun)
-{
-	int rc = TMF_RESP_FUNC_FAILED;
-	struct sas_tmf_task tmf_task;
-
-	tmf_task.tmf = TMF_CLEAR_TASK_SET;
-	rc = mvs_debug_issue_ssp_tmf(dev, lun, &tmf_task);
-
-	return rc;
-}
-
 static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
 			u32 slot_idx, int err)
 {

drivers/scsi/mvsas/mv_sas.h

@@ -440,7 +440,6 @@ void mvs_scan_start(struct Scsi_Host *shost);
 int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time);
 int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags);
 int mvs_abort_task(struct sas_task *task);
-int mvs_clear_task_set(struct domain_device *dev, u8 * lun);
 void mvs_port_formed(struct asd_sas_phy *sas_phy);
 void mvs_port_deformed(struct asd_sas_phy *sas_phy);
 int mvs_dev_found(struct domain_device *dev);

drivers/scsi/pm8001/pm8001_sas.c

@@ -1344,14 +1344,12 @@ int pm8001_abort_task(struct sas_task *task)
 
 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
 {
-	struct sas_tmf_task tmf_task;
 	struct pm8001_device *pm8001_dev = dev->lldd_dev;
 	struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 
 	pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",
 		   pm8001_dev->device_id);
-	tmf_task.tmf = TMF_CLEAR_TASK_SET;
-	return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
+	return sas_clear_task_set(dev, lun);
 }
 
 void pm8001_port_formed(struct asd_sas_phy *sas_phy)

include/scsi/libsas.h

@@ -723,6 +723,7 @@ struct sas_phy *sas_get_local_phy(struct domain_device *dev);
 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
 
 int sas_abort_task_set(struct domain_device *dev, u8 *lun);
+int sas_clear_task_set(struct domain_device *dev, u8 *lun);
 
 int sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
 			  gfp_t gfp_flags);