ide: move command related fields from ide_hwif_t to struct ide_cmd

* Move command related fields from ide_hwif_t to struct ide_cmd.

* Make ide_init_sg_cmd() take command and sectors number as arguments.

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

11 files changed, 50 insertions, 52 deletions

diff --git a/drivers/ide/au1xxx-ide.c b/drivers/ide/au1xxx-ide.c
index 72d7d615e1f..3ace0cda545 100644
--- a/drivers/ide/au1xxx-ide.c
+++ b/drivers/ide/au1xxx-ide.c
@@ -215,7 +215,7 @@ static int auide_build_dmatable(ide_drive_t *drive)
 	struct request *rq = hwif->rq;
 	_auide_hwif *ahwif = &auide_hwif;
 	struct scatterlist *sg;
-	int i = hwif->sg_nents, iswrite, count = 0;
+	int i = hwif->cmd.sg_nents, iswrite, count = 0;
 
 	iswrite = (rq_data_dir(rq) == WRITE);
 	/* Save for interrupt context */
diff --git a/drivers/ide/icside.c b/drivers/ide/icside.c
index 78fc36f98d2..bdfeb1222d5 100644
--- a/drivers/ide/icside.c
+++ b/drivers/ide/icside.c
@@ -344,7 +344,7 @@ static int icside_dma_setup(ide_drive_t *drive)
 	 * Tell the DMA engine about the SG table and
 	 * data direction.
 	 */
-	set_dma_sg(ec->dma, hwif->sg_table, hwif->sg_nents);
+	set_dma_sg(ec->dma, hwif->sg_table, hwif->cmd.sg_nents);
 	set_dma_mode(ec->dma, dma_mode);
 
 	drive->waiting_for_dma = 1;
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index f1555dd4e6a..d00d807c0f5 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -104,14 +104,14 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
 			lba48 = 0;
 	}
 
-	if (!dma) {
-		ide_init_sg_cmd(drive, rq);
-		ide_map_sg(drive, rq);
-	}
-
 	memset(&cmd, 0, sizeof(cmd));
 	cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 
+	if (dma == 0) {
+		ide_init_sg_cmd(&cmd, nsectors);
+		ide_map_sg(drive, rq);
+	}
+
 	if (drive->dev_flags & IDE_DFLAG_LBA) {
 		if (lba48) {
 			pr_debug("%s: LBA=0x%012llx\n", drive->name,
@@ -170,7 +170,7 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
 		/* fallback to PIO */
 		cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
 		ide_tf_set_cmd(drive, &cmd, 0);
-		ide_init_sg_cmd(drive, rq);
+		ide_init_sg_cmd(&cmd, nsectors);
 		rc = do_rw_taskfile(drive, &cmd);
 	}
 
diff --git a/drivers/ide/ide-dma-sff.c b/drivers/ide/ide-dma-sff.c
index 22b3e751d19..7bf28a9b6f6 100644
--- a/drivers/ide/ide-dma-sff.c
+++ b/drivers/ide/ide-dma-sff.c
@@ -120,7 +120,7 @@ int ide_build_dmatable(ide_drive_t *drive, struct request *rq)
 	struct scatterlist *sg;
 	u8 is_trm290 = !!(hwif->host_flags & IDE_HFLAG_TRM290);
 
-	for_each_sg(hwif->sg_table, sg, hwif->sg_nents, i) {
+	for_each_sg(hwif->sg_table, sg, hwif->cmd.sg_nents, i) {
 		u32 cur_addr, cur_len, xcount, bcount;
 
 		cur_addr = sg_dma_address(sg);
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 54f17ae9225..cba9fe585d8 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -128,21 +128,22 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	struct scatterlist *sg = hwif->sg_table;
+	struct ide_cmd *cmd = &hwif->cmd;
 	int i;
 
 	ide_map_sg(drive, rq);
 
 	if (rq_data_dir(rq) == READ)
-		hwif->sg_dma_direction = DMA_FROM_DEVICE;
+		cmd->sg_dma_direction = DMA_FROM_DEVICE;
 	else
-		hwif->sg_dma_direction = DMA_TO_DEVICE;
+		cmd->sg_dma_direction = DMA_TO_DEVICE;
 
-	i = dma_map_sg(hwif->dev, sg, hwif->sg_nents, hwif->sg_dma_direction);
+	i = dma_map_sg(hwif->dev, sg, cmd->sg_nents, cmd->sg_dma_direction);
 	if (i == 0)
 		ide_map_sg(drive, rq);
 	else {
-		hwif->orig_sg_nents = hwif->sg_nents;
-		hwif->sg_nents = i;
+		cmd->orig_sg_nents = cmd->sg_nents;
+		cmd->sg_nents = i;
 	}
 
 	return i;
@@ -162,9 +163,10 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
 void ide_destroy_dmatable(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
+	struct ide_cmd *cmd = &hwif->cmd;
 
-	dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->orig_sg_nents,
-		     hwif->sg_dma_direction);
+	dma_unmap_sg(hwif->dev, hwif->sg_table, cmd->orig_sg_nents,
+		     cmd->sg_dma_direction);
 }
 EXPORT_SYMBOL_GPL(ide_destroy_dmatable);
 
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 5625946739a..f56e9a918b9 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -244,6 +244,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 	ide_hwif_t *hwif = drive->hwif;
+	struct ide_cmd *cmd = &hwif->cmd;
 	struct ide_atapi_pc *pc;
 
 	if (drive->debug_mask & IDE_DBG_RQ)
@@ -285,12 +286,12 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
 	}
 
 	if (blk_fs_request(rq) || pc->req_xfer) {
-		ide_init_sg_cmd(drive, rq);
+		ide_init_sg_cmd(cmd, rq->nr_sectors);
 		ide_map_sg(drive, rq);
 	}
 
 	pc->sg = hwif->sg_table;
-	pc->sg_cnt = hwif->sg_nents;
+	pc->sg_cnt = cmd->sg_nents;
 
 	pc->rq = rq;
 
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 2900271c6dd..7917fa09bf1 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -274,30 +274,26 @@ static ide_startstop_t do_special (ide_drive_t *drive)
 void ide_map_sg(ide_drive_t *drive, struct request *rq)
 {
 	ide_hwif_t *hwif = drive->hwif;
+	struct ide_cmd *cmd = &hwif->cmd;
 	struct scatterlist *sg = hwif->sg_table;
 
 	if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 		sg_init_one(sg, rq->buffer, rq->nr_sectors * SECTOR_SIZE);
-		hwif->sg_nents = 1;
+		cmd->sg_nents = 1;
 	} else if (!rq->bio) {
 		sg_init_one(sg, rq->data, rq->data_len);
-		hwif->sg_nents = 1;
-	} else {
-		hwif->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
-	}
+		cmd->sg_nents = 1;
+	} else
+		cmd->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
 }
-
 EXPORT_SYMBOL_GPL(ide_map_sg);
 
-void ide_init_sg_cmd(ide_drive_t *drive, struct request *rq)
+void ide_init_sg_cmd(struct ide_cmd *cmd, int nsect)
 {
-	ide_hwif_t *hwif = drive->hwif;
-
-	hwif->nsect = hwif->nleft = rq->nr_sectors;
-	hwif->cursg_ofs = 0;
-	hwif->cursg = NULL;
+	cmd->nsect = cmd->nleft = nsect;
+	cmd->cursg_ofs = 0;
+	cmd->cursg = NULL;
 }
-
 EXPORT_SYMBOL_GPL(ide_init_sg_cmd);
 
 /**
@@ -323,7 +319,7 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
 		case TASKFILE_OUT:
 		case TASKFILE_MULTI_IN:
 		case TASKFILE_IN:
-			ide_init_sg_cmd(drive, rq);
+			ide_init_sg_cmd(cmd, rq->nr_sectors);
 			ide_map_sg(drive, rq);
 		default:
 			break;
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index d3bd93afbf2..249a707f88a 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -209,7 +209,7 @@ static void ide_pio_sector(ide_drive_t *drive, struct ide_cmd *cmd,
 {
 	ide_hwif_t *hwif = drive->hwif;
 	struct scatterlist *sg = hwif->sg_table;
-	struct scatterlist *cursg = hwif->cursg;
+	struct scatterlist *cursg = cmd->cursg;
 	struct page *page;
 #ifdef CONFIG_HIGHMEM
 	unsigned long flags;
@@ -217,14 +217,14 @@ static void ide_pio_sector(ide_drive_t *drive, struct ide_cmd *cmd,
 	unsigned int offset;
 	u8 *buf;
 
-	cursg = hwif->cursg;
+	cursg = cmd->cursg;
 	if (!cursg) {
 		cursg = sg;
-		hwif->cursg = sg;
+		cmd->cursg = sg;
 	}
 
 	page = sg_page(cursg);
-	offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
+	offset = cursg->offset + cmd->cursg_ofs * SECTOR_SIZE;
 
 	/* get the current page and offset */
 	page = nth_page(page, (offset >> PAGE_SHIFT));
@@ -235,12 +235,12 @@ static void ide_pio_sector(ide_drive_t *drive, struct ide_cmd *cmd,
 #endif
 	buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 
-	hwif->nleft--;
-	hwif->cursg_ofs++;
+	cmd->nleft--;
+	cmd->cursg_ofs++;
 
-	if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
-		hwif->cursg = sg_next(hwif->cursg);
-		hwif->cursg_ofs = 0;
+	if ((cmd->cursg_ofs * SECTOR_SIZE) == cursg->length) {
+		cmd->cursg = sg_next(cmd->cursg);
+		cmd->cursg_ofs = 0;
 	}
 
 	/* do the actual data transfer */
@@ -260,7 +260,7 @@ static void ide_pio_multi(ide_drive_t *drive, struct ide_cmd *cmd,
 {
 	unsigned int nsect;
 
-	nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
+	nsect = min_t(unsigned int, cmd->nleft, drive->mult_count);
 	while (nsect--)
 		ide_pio_sector(drive, cmd, write);
 }
@@ -295,19 +295,18 @@ static ide_startstop_t task_error(ide_drive_t *drive, struct ide_cmd *cmd,
 				  const char *s, u8 stat)
 {
 	if (cmd->tf_flags & IDE_TFLAG_FS) {
-		ide_hwif_t *hwif = drive->hwif;
-		int sectors = hwif->nsect - hwif->nleft;
+		int sectors = cmd->nsect - cmd->nleft;
 
 		switch (cmd->data_phase) {
 		case TASKFILE_IN:
-			if (hwif->nleft)
+			if (cmd->nleft)
 				break;
 			/* fall through */
 		case TASKFILE_OUT:
 			sectors--;
 			break;
 		case TASKFILE_MULTI_IN:
-			if (hwif->nleft)
+			if (cmd->nleft)
 				break;
 			/* fall through */
 		case TASKFILE_MULTI_OUT:
@@ -375,7 +374,7 @@ static ide_startstop_t task_in_intr(ide_drive_t *drive)
 	ide_pio_datablock(drive, cmd, 0);
 
 	/* Are we done? Check status and finish transfer. */
-	if (!hwif->nleft) {
+	if (cmd->nleft == 0) {
 		stat = wait_drive_not_busy(drive);
 		if (!OK_STAT(stat, 0, BAD_STAT))
 			return task_error(drive, cmd, __func__, stat);
@@ -402,10 +401,10 @@ static ide_startstop_t task_out_intr (ide_drive_t *drive)
 		return task_error(drive, cmd, __func__, stat);
 
 	/* Deal with unexpected ATA data phase. */
-	if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
+	if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 		return task_error(drive, cmd, __func__, stat);
 
-	if (!hwif->nleft) {
+	if (cmd->nleft == 0) {
 		ide_finish_cmd(drive, cmd, stat);
 		return ide_stopped;
 	}
diff --git a/drivers/ide/pmac.c b/drivers/ide/pmac.c
index 904fb54668e..f5b85f4c1b6 100644
--- a/drivers/ide/pmac.c
+++ b/drivers/ide/pmac.c
@@ -1432,7 +1432,7 @@ pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq)
 	volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
 	struct scatterlist *sg;
 	int wr = (rq_data_dir(rq) == WRITE);
-	int i = hwif->sg_nents, count = 0;
+	int i = hwif->cmd.sg_nents, count = 0;
 
 	/* DMA table is already aligned */
 	table = (struct dbdma_cmd *) pmif->dma_table_cpu;
diff --git a/drivers/ide/sgiioc4.c b/drivers/ide/sgiioc4.c
index ab9433a7ad1..b0769e96d32 100644
--- a/drivers/ide/sgiioc4.c
+++ b/drivers/ide/sgiioc4.c
@@ -429,7 +429,7 @@ sgiioc4_build_dma_table(ide_drive_t * drive, struct request *rq, int ddir)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	unsigned int *table = hwif->dmatable_cpu;
-	unsigned int count = 0, i = hwif->sg_nents;
+	unsigned int count = 0, i = hwif->cmd.sg_nents;
 	struct scatterlist *sg = hwif->sg_table;
 
 	while (i && sg_dma_len(sg)) {
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
index bf11791476f..8d155ec8cca 100644
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -240,7 +240,7 @@ static int tx4939ide_build_dmatable(ide_drive_t *drive, struct request *rq)
 	int i;
 	struct scatterlist *sg;
 
-	for_each_sg(hwif->sg_table, sg, hwif->sg_nents, i) {
+	for_each_sg(hwif->sg_table, sg, hwif->cmd.sg_nents, i) {
 		u32 cur_addr, cur_len, bcount;
 
 		cur_addr = sg_dma_address(sg);