scsi: am53c974: use the generic DMA API

Remove usage of the legacy PCI DMA API.  To make this easier we also
store a struct device instead of pci_dev in the dev field of struct
esp.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/am53c974.c

@@ -96,9 +96,7 @@ static void pci_esp_dma_drain(struct esp *esp);
 
 static inline struct pci_esp_priv *pci_esp_get_priv(struct esp *esp)
 {
-	struct pci_dev *pdev = esp->dev;
-
-	return pci_get_drvdata(pdev);
+	return dev_get_drvdata(esp->dev);
 }
 
 static void pci_esp_write8(struct esp *esp, u8 val, unsigned long reg)
@@ -119,25 +117,25 @@ static void pci_esp_write32(struct esp *esp, u32 val, unsigned long reg)
 static dma_addr_t pci_esp_map_single(struct esp *esp, void *buf,
 				     size_t sz, int dir)
 {
-	return pci_map_single(esp->dev, buf, sz, dir);
+	return dma_map_single(esp->dev, buf, sz, dir);
 }
 
 static int pci_esp_map_sg(struct esp *esp, struct scatterlist *sg,
 			  int num_sg, int dir)
 {
-	return pci_map_sg(esp->dev, sg, num_sg, dir);
+	return dma_map_sg(esp->dev, sg, num_sg, dir);
 }
 
 static void pci_esp_unmap_single(struct esp *esp, dma_addr_t addr,
 				 size_t sz, int dir)
 {
-	pci_unmap_single(esp->dev, addr, sz, dir);
+	dma_unmap_single(esp->dev, addr, sz, dir);
 }
 
 static void pci_esp_unmap_sg(struct esp *esp, struct scatterlist *sg,
 			     int num_sg, int dir)
 {
-	pci_unmap_sg(esp->dev, sg, num_sg, dir);
+	dma_unmap_sg(esp->dev, sg, num_sg, dir);
 }
 
 static int pci_esp_irq_pending(struct esp *esp)
@@ -375,18 +373,18 @@ static void dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
 
 static void dc390_check_eeprom(struct esp *esp)
 {
+	struct pci_dev *pdev = to_pci_dev(esp->dev);
 	u8 EEbuf[128];
 	u16 *ptr = (u16 *)EEbuf, wval = 0;
 	int i;
 
-	dc390_read_eeprom((struct pci_dev *)esp->dev, ptr);
+	dc390_read_eeprom(pdev, ptr);
 
 	for (i = 0; i < DC390_EEPROM_LEN; i++, ptr++)
 		wval += *ptr;
 
 	/* no Tekram EEprom found */
 	if (wval != 0x1234) {
-		struct pci_dev *pdev = esp->dev;
 		dev_printk(KERN_INFO, &pdev->dev,
 			   "No valid Tekram EEprom found\n");
 		return;
@@ -411,7 +409,7 @@ static int pci_esp_probe_one(struct pci_dev *pdev,
 		return -ENODEV;
 	}
 
-	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
+	if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
 		dev_printk(KERN_INFO, &pdev->dev,
 			   "failed to set 32bit DMA mask\n");
 		goto fail_disable_device;
@@ -435,7 +433,7 @@ static int pci_esp_probe_one(struct pci_dev *pdev,
 
 	esp = shost_priv(shost);
 	esp->host = shost;
-	esp->dev = pdev;
+	esp->dev = &pdev->dev;
 	esp->ops = &pci_esp_ops;
 	/*
 	 * The am53c974 HBA has a design flaw of generating
@@ -467,8 +465,8 @@ static int pci_esp_probe_one(struct pci_dev *pdev,
 
 	pci_set_master(pdev);
 
-	esp->command_block = pci_alloc_consistent(pdev, 16,
-						  &esp->command_block_dma);
+	esp->command_block = dma_alloc_coherent(&pdev->dev, 16,
+			&esp->command_block_dma, GFP_KERNEL);
 	if (!esp->command_block) {
 		dev_printk(KERN_ERR, &pdev->dev,
 			   "failed to allocate command block\n");
@@ -508,7 +506,7 @@ static int pci_esp_probe_one(struct pci_dev *pdev,
 	free_irq(pdev->irq, esp);
 fail_unmap_command_block:
 	pci_set_drvdata(pdev, NULL);
-	pci_free_consistent(pdev, 16, esp->command_block,
+	dma_free_coherent(&pdev->dev, 16, esp->command_block,
 			  esp->command_block_dma);
 fail_unmap_regs:
 	pci_iounmap(pdev, esp->regs);
@@ -532,7 +530,7 @@ static void pci_esp_remove_one(struct pci_dev *pdev)
 	scsi_esp_unregister(esp);
 	free_irq(pdev->irq, esp);
 	pci_set_drvdata(pdev, NULL);
-	pci_free_consistent(pdev, 16, esp->command_block,
+	dma_free_coherent(&pdev->dev, 16, esp->command_block,
 			  esp->command_block_dma);
 	pci_iounmap(pdev, esp->regs);
 	pci_release_regions(pdev);