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Subject[PATCH 31/40] ide: add ide_issue_pc() helper
Add generic ide_issue_pc() helper to ide-atapi.c and then
convert ide-{floppy,tape,scsi} device drivers to use it.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/ide-atapi.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/ide/ide-floppy.c | 37 ++---------------------------------
drivers/ide/ide-tape.c | 32 ++----------------------------
drivers/scsi/ide-scsi.c | 32 ++----------------------------
include/linux/ide.h | 2 +
5 files changed, 60 insertions(+), 92 deletions(-)

Index: b/drivers/ide/ide-atapi.c
===================================================================
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -68,3 +68,52 @@ ide_startstop_t ide_transfer_pc(ide_driv
return ide_started;
}
EXPORT_SYMBOL_GPL(ide_transfer_pc);
+
+ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_atapi_pc *pc,
+ ide_handler_t *handler, unsigned int timeout,
+ ide_expiry_t *expiry)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ u16 bcount;
+ u8 dma = 0;
+
+ /* We haven't transferred any data yet */
+ pc->xferred = 0;
+ pc->cur_pos = pc->buf;
+
+ /* Request to transfer the entire buffer at once */
+ if (drive->media == ide_tape && !drive->scsi)
+ bcount = pc->req_xfer;
+ else
+ bcount = min(pc->req_xfer, 63 * 1024);
+
+ if (pc->flags & PC_FLAG_DMA_ERROR) {
+ pc->flags &= ~PC_FLAG_DMA_ERROR;
+ ide_dma_off(drive);
+ }
+
+ if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) {
+ if (drive->scsi)
+ hwif->sg_mapped = 1;
+ dma = !hwif->dma_ops->dma_setup(drive);
+ if (drive->scsi)
+ hwif->sg_mapped = 0;
+ }
+
+ if (!dma)
+ pc->flags &= ~PC_FLAG_DMA_OK;
+
+ ide_pktcmd_tf_load(drive, drive->scsi ? 0 : IDE_TFLAG_OUT_DEVICE,
+ bcount, dma);
+
+ /* Issue the packet command */
+ if (pc->flags & PC_FLAG_DRQ_INTERRUPT) {
+ ide_execute_command(drive, WIN_PACKETCMD, handler,
+ timeout, NULL);
+ return ide_started;
+ } else {
+ ide_execute_pkt_cmd(drive);
+ return (*handler)(drive);
+ }
+}
+EXPORT_SYMBOL_GPL(ide_issue_pc);
Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -576,9 +576,6 @@ static ide_startstop_t idefloppy_issue_p
struct ide_atapi_pc *pc)
{
idefloppy_floppy_t *floppy = drive->driver_data;
- ide_hwif_t *hwif = drive->hwif;
- u16 bcount;
- u8 dma;

if (floppy->failed_pc == NULL &&
pc->c[0] != GPCMD_REQUEST_SENSE)
@@ -600,37 +597,9 @@ static ide_startstop_t idefloppy_issue_p
debug_log("Retry number - %d\n", pc->retries);

pc->retries++;
- /* We haven't transferred any data yet */
- pc->xferred = 0;
- pc->cur_pos = pc->buf;
- bcount = min(pc->req_xfer, 63 * 1024);
-
- if (pc->flags & PC_FLAG_DMA_ERROR) {
- pc->flags &= ~PC_FLAG_DMA_ERROR;
- ide_dma_off(drive);
- }
- dma = 0;
-
- if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma)
- dma = !hwif->dma_ops->dma_setup(drive);
-
- if (!dma)
- pc->flags &= ~PC_FLAG_DMA_OK;
-
- ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_DEVICE, bcount, dma);
-
- if (pc->flags & PC_FLAG_DRQ_INTERRUPT) {
- /* Issue the packet command */
- ide_execute_command(drive, WIN_PACKETCMD,
- &idefloppy_transfer_pc1,
- IDEFLOPPY_WAIT_CMD,
- NULL);
- return ide_started;
- } else {
- /* Issue the packet command */
- ide_execute_pkt_cmd(drive);
- return idefloppy_transfer_pc1(drive);
- }
+
+ return ide_issue_pc(drive, pc, idefloppy_transfer_pc1,
+ IDEFLOPPY_WAIT_CMD, NULL);
}

static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -958,10 +958,7 @@ static ide_startstop_t idetape_transfer_
static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
struct ide_atapi_pc *pc)
{
- ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
- int dma_ok = 0;
- u16 bcount;

if (tape->pc->c[0] == REQUEST_SENSE &&
pc->c[0] == REQUEST_SENSE) {
@@ -1002,32 +999,9 @@ static ide_startstop_t idetape_issue_pc(
debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]);

pc->retries++;
- /* We haven't transferred any data yet */
- pc->xferred = 0;
- pc->cur_pos = pc->buf;
- /* Request to transfer the entire buffer at once */
- bcount = pc->req_xfer;
-
- if (pc->flags & PC_FLAG_DMA_ERROR) {
- pc->flags &= ~PC_FLAG_DMA_ERROR;
- ide_dma_off(drive);
- }
- if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma)
- dma_ok = !hwif->dma_ops->dma_setup(drive);
-
- if (!dma_ok)
- pc->flags &= ~PC_FLAG_DMA_OK;
-
- ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_DEVICE, bcount, dma_ok);
-
- if (pc->flags & PC_FLAG_DRQ_INTERRUPT) {
- ide_execute_command(drive, WIN_PACKETCMD, &idetape_transfer_pc,
- IDETAPE_WAIT_CMD, NULL);
- return ide_started;
- } else {
- ide_execute_pkt_cmd(drive);
- return idetape_transfer_pc(drive);
- }
+
+ return ide_issue_pc(drive, pc, idetape_transfer_pc,
+ IDETAPE_WAIT_CMD, NULL);
}

/* A mode sense command is used to "sense" tape parameters. */
Index: b/drivers/scsi/ide-scsi.c
===================================================================
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -502,38 +502,12 @@ static ide_startstop_t idescsi_issue_pc(
struct ide_atapi_pc *pc)
{
idescsi_scsi_t *scsi = drive_to_idescsi(drive);
- ide_hwif_t *hwif = drive->hwif;
- u16 bcount;
- u8 dma = 0;

/* Set the current packet command */
scsi->pc = pc;
- /* We haven't transferred any data yet */
- pc->xferred = 0;
- pc->cur_pos = pc->buf;
- /* Request to transfer the entire buffer at once */
- bcount = min(pc->req_xfer, 63 * 1024);
-
- if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) {
- hwif->sg_mapped = 1;
- dma = !hwif->dma_ops->dma_setup(drive);
- hwif->sg_mapped = 0;
- }
-
- if (!dma)
- pc->flags &= ~PC_FLAG_DMA_OK;
-
- ide_pktcmd_tf_load(drive, 0, bcount, dma);
-
- if (pc->flags & PC_FLAG_DRQ_INTERRUPT) {
- ide_execute_command(drive, WIN_PACKETCMD, &idescsi_transfer_pc,
- get_timeout(pc), idescsi_expiry);
- return ide_started;
- } else {
- /* Issue the packet command */
- ide_execute_pkt_cmd(drive);
- return idescsi_transfer_pc(drive);
- }
+
+ return ide_issue_pc(drive, pc, idescsi_transfer_pc,
+ get_timeout(pc), idescsi_expiry);
}

/*
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -955,6 +955,8 @@ void ide_pktcmd_tf_load(ide_drive_t *, u

ide_startstop_t ide_transfer_pc(ide_drive_t *, struct ide_atapi_pc *,
ide_handler_t *, unsigned int, ide_expiry_t *);
+ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_atapi_pc *,
+ ide_handler_t *, unsigned int, ide_expiry_t *);

ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);


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