Merge patch series "arcmsr fixes"

Ching Huang <ching2048@areca.com.tw> says:

The following patches were made over mkp's 6.4/scsi-staging

This series comtain some fixes:

 - Deprecate arcmsr_pci_unmap_dma()

 - Fix ADAPTER_TYPE_B 64-bit DMA compatibility issue

 - Fix reading buffer empty length error

 - Add driver proc_name

 - Update driver's version to v1.50.00.13-20230206

Link: https://lore.kernel.org/r/6f3eb04dbe89d2b9f239600dd2c575227f3c0afc.camel@areca.com.tw
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: martinkpetersen

drivers/scsi/arcmsr/arcmsr.h

@@ -45,11 +45,12 @@
 #include <linux/interrupt.h>
 struct device_attribute;
 /*The limit of outstanding scsi command that firmware can handle*/
+#define ARCMSR_NAME			"arcmsr"
 #define ARCMSR_MAX_FREECCB_NUM		1024
 #define ARCMSR_MAX_OUTSTANDING_CMD	1024
 #define ARCMSR_DEFAULT_OUTSTANDING_CMD	128
 #define ARCMSR_MIN_OUTSTANDING_CMD	32
-#define ARCMSR_DRIVER_VERSION		"v1.50.00.05-20210429"
+#define ARCMSR_DRIVER_VERSION		"v1.50.00.13-20230206"
 #define ARCMSR_SCSI_INITIATOR_ID	255
 #define ARCMSR_MAX_XFER_SECTORS		512
 #define ARCMSR_MAX_XFER_SECTORS_B	4096

drivers/scsi/arcmsr/arcmsr_hba.c

@@ -153,6 +153,7 @@ static int arcmsr_adjust_disk_queue_depth(struct scsi_device *sdev, int queue_de
 
 static struct scsi_host_template arcmsr_scsi_host_template = {
 	.module			= THIS_MODULE,
+	.proc_name		= ARCMSR_NAME,
 	.name			= "Areca SAS/SATA RAID driver",
 	.info			= arcmsr_info,
 	.queuecommand		= arcmsr_queue_command,
@@ -996,6 +997,8 @@ static int arcmsr_set_dma_mask(struct AdapterControlBlock *acb)
 		if (((acb->adapter_type == ACB_ADAPTER_TYPE_A) && !dma_mask_64) ||
 		    dma_set_mask(&pcidev->dev, DMA_BIT_MASK(64)))
 			goto	dma32;
+		if (acb->adapter_type <= ACB_ADAPTER_TYPE_B)
+			return 0;
 		if (dma_set_coherent_mask(&pcidev->dev, DMA_BIT_MASK(64)) ||
 		    dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(64))) {
 			printk("arcmsr: set DMA 64 mask failed\n");
@@ -1299,20 +1302,13 @@ static uint8_t arcmsr_abort_allcmd(struct AdapterControlBlock *acb)
 	return rtnval;
 }
 
-static void arcmsr_pci_unmap_dma(struct CommandControlBlock *ccb)
-{
-	struct scsi_cmnd *pcmd = ccb->pcmd;
-
-	scsi_dma_unmap(pcmd);
-}
-
 static void arcmsr_ccb_complete(struct CommandControlBlock *ccb)
 {
 	struct AdapterControlBlock *acb = ccb->acb;
 	struct scsi_cmnd *pcmd = ccb->pcmd;
 	unsigned long flags;
 	atomic_dec(&acb->ccboutstandingcount);
-	arcmsr_pci_unmap_dma(ccb);
+	scsi_dma_unmap(ccb->pcmd);
 	ccb->startdone = ARCMSR_CCB_DONE;
 	spin_lock_irqsave(&acb->ccblist_lock, flags);
 	list_add_tail(&ccb->list, &acb->ccb_free_list);
@@ -1596,7 +1592,7 @@ static void arcmsr_remove_scsi_devices(struct AdapterControlBlock *acb)
 		ccb = acb->pccb_pool[i];
 		if (ccb->startdone == ARCMSR_CCB_START) {
 			ccb->pcmd->result = DID_NO_CONNECT << 16;
-			arcmsr_pci_unmap_dma(ccb);
+			scsi_dma_unmap(ccb->pcmd);
 			scsi_done(ccb->pcmd);
 		}
 	}
@@ -2259,8 +2255,11 @@ static void arcmsr_iop2drv_data_wrote_handle(struct AdapterControlBlock *acb)
 
 	spin_lock_irqsave(&acb->rqbuffer_lock, flags);
 	prbuffer = arcmsr_get_iop_rqbuffer(acb);
-	buf_empty_len = (acb->rqbuf_putIndex - acb->rqbuf_getIndex - 1) &
-		(ARCMSR_MAX_QBUFFER - 1);
+	if (acb->rqbuf_putIndex >= acb->rqbuf_getIndex) {
+		buf_empty_len = (ARCMSR_MAX_QBUFFER - 1) -
+		(acb->rqbuf_putIndex - acb->rqbuf_getIndex);
+	} else
+		buf_empty_len = acb->rqbuf_getIndex - acb->rqbuf_putIndex - 1;
 	if (buf_empty_len >= readl(&prbuffer->data_len)) {
 		if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
 			acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;