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ide: add ide_dma_prepare() helper

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* Add ide_dma_prepare() helper.

* Convert ide_issue_pc() and do_rw_taskfile() to use it.

* Make ide_build_sglist() static.

There should be no functional changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-03-31 20:15:20 +02:00
parent 4453011f95
commit 5ae5412d9a
4 changed files with 19 additions and 21 deletions
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18
drivers/ide/ide-atapi.c
View file

@ -638,7 +638,6 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
{
struct ide_atapi_pc *pc;
ide_hwif_t *hwif = drive->hwif;
const struct ide_dma_ops *dma_ops = hwif->dma_ops;
ide_expiry_t *expiry = NULL;
struct request *rq = hwif->rq;
unsigned int timeout;
@ -652,12 +651,8 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
expiry = ide_cd_expiry;
timeout = ATAPI_WAIT_PC;
if (drive->dma) {
if (ide_build_sglist(drive, cmd))
drive->dma = !dma_ops->dma_setup(drive, cmd);
else
drive->dma = 0;
}
if (drive->dma)
drive->dma = !ide_dma_prepare(drive, cmd);
} else {
pc = drive->pc;
@ -675,13 +670,8 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
ide_dma_off(drive);
}
if ((pc->flags & PC_FLAG_DMA_OK) &&
(drive->dev_flags & IDE_DFLAG_USING_DMA)) {
if (ide_build_sglist(drive, cmd))
drive->dma = !dma_ops->dma_setup(drive, cmd);
else
drive->dma = 0;
}
if (pc->flags & PC_FLAG_DMA_OK)
drive->dma = !ide_dma_prepare(drive, cmd);
if (!drive->dma)
pc->flags &= ~PC_FLAG_DMA_OK;

11
drivers/ide/ide-dma.c
View file

@ -128,7 +128,7 @@ int ide_dma_good_drive(ide_drive_t *drive)
* operate in a portable fashion.
*/
int ide_build_sglist(ide_drive_t *drive, struct ide_cmd *cmd)
static int ide_build_sglist(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
@ -563,3 +563,12 @@ int ide_allocate_dma_engine(ide_hwif_t *hwif)
return 0;
}
EXPORT_SYMBOL_GPL(ide_allocate_dma_engine);
int ide_dma_prepare(ide_drive_t *drive, struct ide_cmd *cmd)
{
if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
ide_build_sglist(drive, cmd) == 0 ||
drive->hwif->dma_ops->dma_setup(drive, cmd))
return 1;
return 0;
}

4
drivers/ide/ide-taskfile.c
View file

@ -100,9 +100,7 @@ ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
return ide_started;
case ATA_PROT_DMA:
if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
ide_build_sglist(drive, cmd) == 0 ||
dma_ops->dma_setup(drive, cmd))
if (ide_dma_prepare(drive, cmd))
return ide_stopped;
hwif->expiry = dma_ops->dma_timer_expiry;
ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);

7
include/linux/ide.h
View file

@ -1443,7 +1443,8 @@ ide_startstop_t ide_dma_intr(ide_drive_t *);
int ide_allocate_dma_engine(ide_hwif_t *);
void ide_release_dma_engine(ide_hwif_t *);
int ide_build_sglist(ide_drive_t *, struct ide_cmd *);
int ide_dma_prepare(ide_drive_t *, struct ide_cmd *);
void ide_destroy_dmatable(ide_drive_t *);
#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
@ -1477,8 +1478,8 @@ static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
static inline ide_startstop_t ide_dma_intr(ide_drive_t *drive) { return ide_stopped; }
static inline ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error) { return ide_stopped; }
static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
static inline int ide_build_sglist(ide_drive_t *drive,
struct ide_cmd *cmd) { return 0; }
static inline int ide_dma_prepare(ide_drive_t *drive,
struct ide_cmd *cmd) { return 1; }
static inline void ide_destroy_dmatable(ide_drive_t *drive) { ; }
#endif /* CONFIG_BLK_DEV_IDEDMA */