[ide] pmac: use more ide_hwif_t fields

Use dmatable_dma, sg_table, sg_nents and sg_dma_direction fields
of ide_hwif_t and remove their equivalents from pmac_ide_hwif_t.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ppc/pmac.c

@@ -78,10 +78,6 @@ typedef struct pmac_ide_hwif {
 	 */
 	volatile struct dbdma_regs __iomem *	dma_regs;
 	struct dbdma_cmd*		dma_table_cpu;
-	dma_addr_t			dma_table_dma;
-	struct scatterlist*		sg_table;
-	int				sg_nents;
-	int				sg_dma_direction;
 #endif
 	
 } pmac_ide_hwif_t;
@@ -1562,26 +1558,23 @@ pmac_ide_probe(void)
 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
 
 /*
- * This is very close to the generic ide-dma version of the function except
- * that we don't use the fields in the hwif but our own copies for sg_table
- * and friends. We build & map the sglist for a given request
+ * We build & map the sglist for a given request.
  */
 static int __pmac
 pmac_ide_build_sglist(ide_drive_t *drive, struct request *rq)
 {
 	ide_hwif_t *hwif = HWIF(drive);
-	pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
-	struct scatterlist *sg = pmif->sg_table;
+	struct scatterlist *sg = hwif->sg_table;
 	int nents;
 
 	nents = blk_rq_map_sg(drive->queue, rq, sg);
 		
 	if (rq_data_dir(rq) == READ)
-		pmif->sg_dma_direction = PCI_DMA_FROMDEVICE;
+		hwif->sg_dma_direction = PCI_DMA_FROMDEVICE;
 	else
-		pmif->sg_dma_direction = PCI_DMA_TODEVICE;
+		hwif->sg_dma_direction = PCI_DMA_TODEVICE;
 
-	return pci_map_sg(hwif->pci_dev, sg, nents, pmif->sg_dma_direction);
+	return pci_map_sg(hwif->pci_dev, sg, nents, hwif->sg_dma_direction);
 }
 
 /*
@@ -1591,17 +1584,16 @@ static int __pmac
 pmac_ide_raw_build_sglist(ide_drive_t *drive, struct request *rq)
 {
 	ide_hwif_t *hwif = HWIF(drive);
-	pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
-	struct scatterlist *sg = pmif->sg_table;
+	struct scatterlist *sg = hwif->sg_table;
 	int nents = 0;
 	ide_task_t *args = rq->special;
 	unsigned char *virt_addr = rq->buffer;
 	int sector_count = rq->nr_sectors;
 
 	if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
-		pmif->sg_dma_direction = PCI_DMA_TODEVICE;
+		hwif->sg_dma_direction = PCI_DMA_TODEVICE;
 	else
-		pmif->sg_dma_direction = PCI_DMA_FROMDEVICE;
+		hwif->sg_dma_direction = PCI_DMA_FROMDEVICE;
 
 	if (sector_count > 128) {
 		sg_init_one(&sg[nents], virt_addr, 128 * SECTOR_SIZE);
@@ -1612,7 +1604,7 @@ pmac_ide_raw_build_sglist(ide_drive_t *drive, struct request *rq)
 	sg_init_one(&sg[nents], virt_addr, sector_count * SECTOR_SIZE);
 	nents++;
 
-	return pci_map_sg(hwif->pci_dev, sg, nents, pmif->sg_dma_direction);
+	return pci_map_sg(hwif->pci_dev, sg, nents, hwif->sg_dma_direction);
 }
 
 /*
@@ -1640,14 +1632,14 @@ pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq)
 
 	/* Build sglist */
 	if (HWGROUP(drive)->rq->flags & REQ_DRIVE_TASKFILE)
-		pmif->sg_nents = i = pmac_ide_raw_build_sglist(drive, rq);
+		hwif->sg_nents = i = pmac_ide_raw_build_sglist(drive, rq);
 	else
-		pmif->sg_nents = i = pmac_ide_build_sglist(drive, rq);
+		hwif->sg_nents = i = pmac_ide_build_sglist(drive, rq);
 	if (!i)
 		return 0;
 
 	/* Build DBDMA commands list */
-	sg = pmif->sg_table;
+	sg = hwif->sg_table;
 	while (i && sg_dma_len(sg)) {
 		u32 cur_addr;
 		u32 cur_len;
@@ -1692,16 +1684,16 @@ pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq)
 		memset(table, 0, sizeof(struct dbdma_cmd));
 		st_le16(&table->command, DBDMA_STOP);
 		mb();
-		writel(pmif->dma_table_dma, &dma->cmdptr);
+		writel(hwif->dmatable_dma, &dma->cmdptr);
 		return 1;
 	}
 
 	printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name);
  use_pio_instead:
 	pci_unmap_sg(hwif->pci_dev,
-		     pmif->sg_table,
-		     pmif->sg_nents,
-		     pmif->sg_dma_direction);
+		     hwif->sg_table,
+		     hwif->sg_nents,
+		     hwif->sg_dma_direction);
 	return 0; /* revert to PIO for this request */
 }
 
@@ -1709,14 +1701,14 @@ pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq)
 static void __pmac
 pmac_ide_destroy_dmatable (ide_drive_t *drive)
 {
+	ide_hwif_t *hwif = drive->hwif;
 	struct pci_dev *dev = HWIF(drive)->pci_dev;
-	pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
-	struct scatterlist *sg = pmif->sg_table;
-	int nents = pmif->sg_nents;
+	struct scatterlist *sg = hwif->sg_table;
+	int nents = hwif->sg_nents;
 
 	if (nents) {
-		pci_unmap_sg(dev, sg, nents, pmif->sg_dma_direction);
-		pmif->sg_nents = 0;
+		pci_unmap_sg(dev, sg, nents, hwif->sg_dma_direction);
+		hwif->sg_nents = 0;
 	}
 }
 
@@ -2065,19 +2057,19 @@ pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
 	pmif->dma_table_cpu = (struct dbdma_cmd*)pci_alloc_consistent(
 		hwif->pci_dev,
 		(MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
-		&pmif->dma_table_dma);
+		&hwif->dmatable_dma);
 	if (pmif->dma_table_cpu == NULL) {
 		printk(KERN_ERR "%s: unable to allocate DMA command list\n",
 		       hwif->name);
 		return;
 	}
 
-	pmif->sg_table = kmalloc(sizeof(struct scatterlist) * MAX_DCMDS,
+	hwif->sg_table = kmalloc(sizeof(struct scatterlist) * MAX_DCMDS,
 				 GFP_KERNEL);
-	if (pmif->sg_table == NULL) {
+	if (hwif->sg_table == NULL) {
 		pci_free_consistent(	hwif->pci_dev,
 					(MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
-				    	pmif->dma_table_cpu, pmif->dma_table_dma);
+					pmif->dma_table_cpu, hwif->dmatable_dma);
 		return;
 	}
 	hwif->ide_dma_off_quietly = &__ide_dma_off_quietly;