scsi: 3w-xxx: fully convert to the generic DMA API

The driver is currently using an odd mix of legacy PCI DMA API and
generic DMA API calls, switch it over to the generic API entirely.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NAdam Radford <aradford@gmail.com>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/3w-xxxx.c

@@ -834,15 +834,17 @@ static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
 
 	dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
 
-	cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
+	cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev,
+			size * TW_Q_LENGTH, &dma_handle, GFP_KERNEL);
 	if (cpu_addr == NULL) {
-		printk(KERN_WARNING "3w-xxxx: pci_alloc_consistent() failed.\n");
+		printk(KERN_WARNING "3w-xxxx: dma_alloc_coherent() failed.\n");
 		return 1;
 	}
 
 	if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
 		printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
-		pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
+		dma_free_coherent(&tw_dev->tw_pci_dev->dev, size * TW_Q_LENGTH,
+				cpu_addr, dma_handle);
 		return 1;
 	}
 
@@ -1062,10 +1064,16 @@ static void tw_free_device_extension(TW_Device_Extension *tw_dev)
 
 	/* Free command packet and generic buffer memory */
 	if (tw_dev->command_packet_virtual_address[0])
-		pci_free_consistent(tw_dev->tw_pci_dev, sizeof(TW_Command)*TW_Q_LENGTH, tw_dev->command_packet_virtual_address[0], tw_dev->command_packet_physical_address[0]);
+		dma_free_coherent(&tw_dev->tw_pci_dev->dev,
+				sizeof(TW_Command) * TW_Q_LENGTH,
+				tw_dev->command_packet_virtual_address[0],
+				tw_dev->command_packet_physical_address[0]);
 
 	if (tw_dev->alignment_virtual_address[0])
-		pci_free_consistent(tw_dev->tw_pci_dev, sizeof(TW_Sector)*TW_Q_LENGTH, tw_dev->alignment_virtual_address[0], tw_dev->alignment_physical_address[0]);
+		dma_free_coherent(&tw_dev->tw_pci_dev->dev,
+				sizeof(TW_Sector) * TW_Q_LENGTH,
+				tw_dev->alignment_virtual_address[0],
+				tw_dev->alignment_physical_address[0]);
 } /* End tw_free_device_extension() */
 
 /* This function will send an initconnection command to controller */
@@ -2260,7 +2268,7 @@ static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
 
 	pci_set_master(pdev);
 
-	retval = pci_set_dma_mask(pdev, TW_DMA_MASK);
+	retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 	if (retval) {
 		printk(KERN_WARNING "3w-xxxx: Failed to set dma mask.");
 		goto out_disable_device;

drivers/scsi/3w-xxxx.h

@@ -230,7 +230,6 @@ static unsigned char tw_sense_table[][4] =
 #define TW_IOCTL_TIMEOUT                      25 /* 25 seconds */
 #define TW_IOCTL_CHRDEV_TIMEOUT               60 /* 60 seconds */
 #define TW_IOCTL_CHRDEV_FREE                  -1
-#define TW_DMA_MASK			      DMA_BIT_MASK(32)
 #define TW_MAX_CDB_LEN			      16
 
 /* Bitmask macros to eliminate bitfields */