scsi: libsas: Introduce more SAM status code aliases in enum exec_status

This patch prepares for converting SAM status codes into an enum. Without
this patch converting SAM status codes into an enumeration type would
trigger complaints about enum type mismatches for the SAS code.

Link: https://lore.kernel.org/r/20210524025457.11299-2-bvanassche@acm.org
Cc: Hannes Reinecke <hare@suse.com>
Cc: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Cc: Jason Yan <yanaijie@huawei.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aic94xx/aic94xx_task.c

@@ -205,7 +205,7 @@ static void asd_task_tasklet_complete(struct asd_ascb *ascb,
 	switch (opcode) {
 	case TC_NO_ERROR:
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		break;
 	case TC_UNDERRUN:
 		ts->resp = SAS_TASK_COMPLETE;

drivers/scsi/hisi_sas/hisi_sas_v1_hw.c

@@ -1152,14 +1152,14 @@ static void slot_err_v1_hw(struct hisi_hba *hisi_hba,
 		}
 		default:
 		{
-			ts->stat = SAM_STAT_CHECK_CONDITION;
+			ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 			break;
 		}
 		}
 	}
 		break;
 	case SAS_PROTOCOL_SMP:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 
 	case SAS_PROTOCOL_SATA:
@@ -1281,7 +1281,7 @@ static void slot_complete_v1_hw(struct hisi_hba *hisi_hba,
 		struct scatterlist *sg_resp = &task->smp_task.smp_resp;
 		void *to = page_address(sg_page(sg_resp));
 
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 
 		dma_unmap_sg(dev, &task->smp_task.smp_req, 1,
 			     DMA_TO_DEVICE);
@@ -1298,7 +1298,7 @@ static void slot_complete_v1_hw(struct hisi_hba *hisi_hba,
 		break;
 
 	default:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 	}
 

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

@@ -2168,7 +2168,7 @@ static void slot_err_v2_hw(struct hisi_hba *hisi_hba,
 	}
 		break;
 	case SAS_PROTOCOL_SMP:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 
 	case SAS_PROTOCOL_SATA:
@@ -2427,7 +2427,7 @@ static void slot_complete_v2_hw(struct hisi_hba *hisi_hba,
 		struct scatterlist *sg_resp = &task->smp_task.smp_resp;
 		void *to = page_address(sg_page(sg_resp));
 
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 
 		dma_unmap_sg(dev, &task->smp_task.smp_req, 1,
 			     DMA_TO_DEVICE);
@@ -2441,12 +2441,12 @@ static void slot_complete_v2_hw(struct hisi_hba *hisi_hba,
 	case SAS_PROTOCOL_STP:
 	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 	{
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		hisi_sas_sata_done(task, slot);
 		break;
 	}
 	default:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 	}
 

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

@@ -2178,7 +2178,7 @@ slot_err_v3_hw(struct hisi_hba *hisi_hba, struct sas_task *task,
 		hisi_sas_sata_done(task, slot);
 		break;
 	case SAS_PROTOCOL_SMP:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 	default:
 		break;
@@ -2285,7 +2285,7 @@ static void slot_complete_v3_hw(struct hisi_hba *hisi_hba,
 		struct scatterlist *sg_resp = &task->smp_task.smp_resp;
 		void *to = page_address(sg_page(sg_resp));
 
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 
 		dma_unmap_sg(dev, &task->smp_task.smp_req, 1,
 			     DMA_TO_DEVICE);
@@ -2298,11 +2298,11 @@ static void slot_complete_v3_hw(struct hisi_hba *hisi_hba,
 	case SAS_PROTOCOL_SATA:
 	case SAS_PROTOCOL_STP:
 	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		hisi_sas_sata_done(task, slot);
 		break;
 	default:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 	}
 

drivers/scsi/isci/request.c

@@ -2566,7 +2566,7 @@ static void isci_request_handle_controller_specific_errors(
 			if (!idev)
 				*status_ptr = SAS_DEVICE_UNKNOWN;
 			else
-				*status_ptr = SAM_STAT_TASK_ABORTED;
+				*status_ptr = SAS_SAM_STAT_TASK_ABORTED;
 
 			clear_bit(IREQ_COMPLETE_IN_TARGET, &request->flags);
 		}
@@ -2696,7 +2696,7 @@ static void isci_request_handle_controller_specific_errors(
 	default:
 		/* Task in the target is not done. */
 		*response_ptr = SAS_TASK_UNDELIVERED;
-		*status_ptr = SAM_STAT_TASK_ABORTED;
+		*status_ptr = SAS_SAM_STAT_TASK_ABORTED;
 
 		if (task->task_proto == SAS_PROTOCOL_SMP)
 			set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags);
@@ -2719,7 +2719,7 @@ static void isci_process_stp_response(struct sas_task *task, struct dev_to_host_
 	if (ac_err_mask(fis->status))
 		ts->stat = SAS_PROTO_RESPONSE;
 	else
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 
 	ts->resp = SAS_TASK_COMPLETE;
 }
@@ -2782,7 +2782,7 @@ static void isci_request_io_request_complete(struct isci_host *ihost,
 	case SCI_IO_SUCCESS_IO_DONE_EARLY:
 
 		response = SAS_TASK_COMPLETE;
-		status   = SAM_STAT_GOOD;
+		status   = SAS_SAM_STAT_GOOD;
 		set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags);
 
 		if (completion_status == SCI_IO_SUCCESS_IO_DONE_EARLY) {
@@ -2852,7 +2852,7 @@ static void isci_request_io_request_complete(struct isci_host *ihost,
 
 		/* Fail the I/O. */
 		response = SAS_TASK_UNDELIVERED;
-		status = SAM_STAT_TASK_ABORTED;
+		status = SAS_SAM_STAT_TASK_ABORTED;
 
 		clear_bit(IREQ_COMPLETE_IN_TARGET, &request->flags);
 		break;

drivers/scsi/isci/task.c

@@ -160,7 +160,7 @@ int isci_task_execute_task(struct sas_task *task, gfp_t gfp_flags)
 
 			isci_task_refuse(ihost, task,
 					 SAS_TASK_UNDELIVERED,
-					 SAM_STAT_TASK_ABORTED);
+					 SAS_SAM_STAT_TASK_ABORTED);
 		} else {
 			task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 			spin_unlock_irqrestore(&task->task_state_lock, flags);

drivers/scsi/libsas/sas_ata.c

@@ -116,9 +116,10 @@ static void sas_ata_task_done(struct sas_task *task)
 		}
 	}
 
-	if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
-	    ((stat->stat == SAM_STAT_CHECK_CONDITION &&
-	      dev->sata_dev.class == ATA_DEV_ATAPI))) {
+	if (stat->stat == SAS_PROTO_RESPONSE ||
+	    stat->stat == SAS_SAM_STAT_GOOD ||
+	    (stat->stat == SAS_SAM_STAT_CHECK_CONDITION &&
+	      dev->sata_dev.class == ATA_DEV_ATAPI)) {
 		memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE);
 
 		if (!link->sactive) {

drivers/scsi/libsas/sas_expander.c

@@ -101,7 +101,7 @@ static int smp_execute_task_sg(struct domain_device *dev,
 			}
 		}
 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-		    task->task_status.stat == SAM_STAT_GOOD) {
+		    task->task_status.stat == SAS_SAM_STAT_GOOD) {
 			res = 0;
 			break;
 		}

drivers/scsi/libsas/sas_task.c

@@ -20,7 +20,7 @@ void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 	else if (iu->datapres == 1)
 		tstat->stat = iu->resp_data[3];
 	else if (iu->datapres == 2) {
-		tstat->stat = SAM_STAT_CHECK_CONDITION;
+		tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		tstat->buf_valid_size =
 			min_t(int, SAS_STATUS_BUF_SIZE,
 			      be32_to_cpu(iu->sense_data_len));
@@ -32,7 +32,7 @@ void sas_ssp_task_response(struct device *dev, struct sas_task *task,
 	}
 	else
 		/* when datapres contains corrupt/unknown value... */
-		tstat->stat = SAM_STAT_CHECK_CONDITION;
+		tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
 }
 EXPORT_SYMBOL_GPL(sas_ssp_task_response);
 

drivers/scsi/mvsas/mv_sas.c

@@ -1314,7 +1314,7 @@ static int mvs_exec_internal_tmf_task(struct domain_device *dev,
 		}
 
 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-		    task->task_status.stat == SAM_STAT_GOOD) {
+		    task->task_status.stat == SAS_SAM_STAT_GOOD) {
 			res = TMF_RESP_FUNC_COMPLETE;
 			break;
 		}
@@ -1764,7 +1764,7 @@ int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
 	case SAS_PROTOCOL_SSP:
 		/* hw says status == 0, datapres == 0 */
 		if (rx_desc & RXQ_GOOD) {
-			tstat->stat = SAM_STAT_GOOD;
+			tstat->stat = SAS_SAM_STAT_GOOD;
 			tstat->resp = SAS_TASK_COMPLETE;
 		}
 		/* response frame present */
@@ -1773,12 +1773,12 @@ int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
 						sizeof(struct mvs_err_info);
 			sas_ssp_task_response(mvi->dev, task, iu);
 		} else
-			tstat->stat = SAM_STAT_CHECK_CONDITION;
+			tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 
 	case SAS_PROTOCOL_SMP: {
 			struct scatterlist *sg_resp = &task->smp_task.smp_resp;
-			tstat->stat = SAM_STAT_GOOD;
+			tstat->stat = SAS_SAM_STAT_GOOD;
 			to = kmap_atomic(sg_page(sg_resp));
 			memcpy(to + sg_resp->offset,
 				slot->response + sizeof(struct mvs_err_info),
@@ -1795,7 +1795,7 @@ int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
 		}
 
 	default:
-		tstat->stat = SAM_STAT_CHECK_CONDITION;
+		tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 	}
 	if (!slot->port->port_attached) {

drivers/scsi/pm8001/pm8001_hwi.c

@@ -1930,7 +1930,7 @@ mpi_ssp_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
 			   param);
 		if (param == 0) {
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 		} else {
 			ts->resp = SAS_TASK_COMPLETE;
 			ts->stat = SAS_PROTO_RESPONSE;
@@ -2390,7 +2390,7 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
 		pm8001_dbg(pm8001_ha, IO, "IO_SUCCESS\n");
 		if (param == 0) {
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 			/* check if response is for SEND READ LOG */
 			if (pm8001_dev &&
 				(pm8001_dev->id & NCQ_READ_LOG_FLAG)) {
@@ -2912,7 +2912,7 @@ mpi_smp_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
 	case IO_SUCCESS:
 		pm8001_dbg(pm8001_ha, IO, "IO_SUCCESS\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		if (pm8001_dev)
 			atomic_dec(&pm8001_dev->running_req);
 		break;
@@ -2939,17 +2939,17 @@ mpi_smp_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
 	case IO_ERROR_HW_TIMEOUT:
 		pm8001_dbg(pm8001_ha, IO, "IO_ERROR_HW_TIMEOUT\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_XFER_ERROR_BREAK:
 		pm8001_dbg(pm8001_ha, IO, "IO_XFER_ERROR_BREAK\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_XFER_ERROR_PHY_NOT_READY:
 		pm8001_dbg(pm8001_ha, IO, "IO_XFER_ERROR_PHY_NOT_READY\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_OPEN_CNX_ERROR_PROTOCOL_NOT_SUPPORTED:
 		pm8001_dbg(pm8001_ha, IO,
@@ -3710,7 +3710,7 @@ int pm8001_mpi_task_abort_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
 	case IO_SUCCESS:
 		pm8001_dbg(pm8001_ha, EH, "IO_SUCCESS\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		break;
 	case IO_NOT_VALID:
 		pm8001_dbg(pm8001_ha, EH, "IO_NOT_VALID\n");
@@ -4355,7 +4355,7 @@ static int pm8001_chip_sata_req(struct pm8001_hba_info *pm8001_ha,
 
 			spin_lock_irqsave(&task->task_state_lock, flags);
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 			task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 			task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 			task->task_state_flags |= SAS_TASK_STATE_DONE;

drivers/scsi/pm8001/pm8001_sas.c

@@ -753,7 +753,7 @@ static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 		}
 
 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-			task->task_status.stat == SAM_STAT_GOOD) {
+			task->task_status.stat == SAS_SAM_STAT_GOOD) {
 			res = TMF_RESP_FUNC_COMPLETE;
 			break;
 		}
@@ -838,7 +838,7 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 		}
 
 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-			task->task_status.stat == SAM_STAT_GOOD) {
+			task->task_status.stat == SAS_SAM_STAT_GOOD) {
 			res = TMF_RESP_FUNC_COMPLETE;
 			break;
 

drivers/scsi/pm8001/pm80xx_hwi.c

@@ -1952,7 +1952,7 @@ mpi_ssp_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
 			   param);
 		if (param == 0) {
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 		} else {
 			ts->resp = SAS_TASK_COMPLETE;
 			ts->stat = SAS_PROTO_RESPONSE;
@@ -2487,7 +2487,7 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
 		pm8001_dbg(pm8001_ha, IO, "IO_SUCCESS\n");
 		if (param == 0) {
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 			/* check if response is for SEND READ LOG */
 			if (pm8001_dev &&
 				(pm8001_dev->id & NCQ_READ_LOG_FLAG)) {
@@ -3042,7 +3042,7 @@ mpi_smp_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
 	case IO_SUCCESS:
 		pm8001_dbg(pm8001_ha, IO, "IO_SUCCESS\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		if (pm8001_dev)
 			atomic_dec(&pm8001_dev->running_req);
 		if (pm8001_ha->smp_exp_mode == SMP_DIRECT) {
@@ -3084,17 +3084,17 @@ mpi_smp_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
 	case IO_ERROR_HW_TIMEOUT:
 		pm8001_dbg(pm8001_ha, IO, "IO_ERROR_HW_TIMEOUT\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_XFER_ERROR_BREAK:
 		pm8001_dbg(pm8001_ha, IO, "IO_XFER_ERROR_BREAK\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_XFER_ERROR_PHY_NOT_READY:
 		pm8001_dbg(pm8001_ha, IO, "IO_XFER_ERROR_PHY_NOT_READY\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_OPEN_CNX_ERROR_PROTOCOL_NOT_SUPPORTED:
 		pm8001_dbg(pm8001_ha, IO,
@@ -4699,7 +4699,7 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info *pm8001_ha,
 
 			spin_lock_irqsave(&task->task_state_lock, flags);
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 			task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 			task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 			task->task_state_flags |= SAS_TASK_STATE_DONE;

include/scsi/libsas.h

@@ -474,10 +474,16 @@ enum service_response {
 };
 
 enum exec_status {
-	/* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
-	 * them here to silence 'case value not in enumerated type' warnings
+	/*
+	 * Values 0..0x7f are used to return the SAM_STAT_* codes.  To avoid
+	 * 'case value not in enumerated type' compiler warnings every value
+	 * returned through the exec_status enum needs an alias with the SAS_
+	 * prefix here.
 	 */
-	__SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
+	SAS_SAM_STAT_GOOD = SAM_STAT_GOOD,
+	SAS_SAM_STAT_BUSY = SAM_STAT_BUSY,
+	SAS_SAM_STAT_TASK_ABORTED = SAM_STAT_TASK_ABORTED,
+	SAS_SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
 
 	SAS_DEV_NO_RESPONSE = 0x80,
 	SAS_DATA_UNDERRUN,