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author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-03-27 12:46:46 +0100 |
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committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-03-27 12:46:46 +0100 |
commit | 2298169418f43ba5e0919762a4bab95a1227872a (patch) | |
tree | 67cf3133c7bae747ad957c68a650534105a7d8e7 /drivers/ide/scc_pata.c | |
parent | 130e886708d6e11f3d54e5d27c266578de56f343 (diff) | |
download | kernel_samsung_smdk4412-2298169418f43ba5e0919762a4bab95a1227872a.zip kernel_samsung_smdk4412-2298169418f43ba5e0919762a4bab95a1227872a.tar.gz kernel_samsung_smdk4412-2298169418f43ba5e0919762a4bab95a1227872a.tar.bz2 |
ide: pass command to ide_map_sg()
* Set IDE_TFLAG_WRITE flag and ->rq also for ATA_CMD_PACKET
commands.
* Pass command to ->dma_setup method and update all its
implementations accordingly.
* Pass command instead of request to ide_build_sglist(),
*_build_dmatable() and ide_map_sg().
While at it:
* Fix scc_dma_setup() documentation + use ATA_DMA_WR define.
* Rename sgiioc4_build_dma_table() to sgiioc4_build_dmatable(),
change return value type to 'int' and drop unused 'ddir'
argument.
* Do some minor cleanups in [tx4939]ide_dma_setup().
There should be no functional changes caused by this patch.
Acked-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/scc_pata.c')
-rw-r--r-- | drivers/ide/scc_pata.c | 19 |
1 files changed, 7 insertions, 12 deletions
diff --git a/drivers/ide/scc_pata.c b/drivers/ide/scc_pata.c index ada8667..1f2805ce 100644 --- a/drivers/ide/scc_pata.c +++ b/drivers/ide/scc_pata.c @@ -303,8 +303,9 @@ static void scc_dma_host_set(ide_drive_t *drive, int on) } /** - * scc_ide_dma_setup - begin a DMA phase + * scc_dma_setup - begin a DMA phase * @drive: target device + * @cmd: command * * Build an IDE DMA PRD (IDE speak for scatter gather table) * and then set up the DMA transfer registers. @@ -313,21 +314,15 @@ static void scc_dma_host_set(ide_drive_t *drive, int on) * is returned. */ -static int scc_dma_setup(ide_drive_t *drive) +static int scc_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd) { ide_hwif_t *hwif = drive->hwif; - struct request *rq = hwif->rq; - unsigned int reading; + u32 rw = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 0 : ATA_DMA_WR; u8 dma_stat; - if (rq_data_dir(rq)) - reading = 0; - else - reading = 1 << 3; - /* fall back to pio! */ - if (!ide_build_dmatable(drive, rq)) { - ide_map_sg(drive, rq); + if (ide_build_dmatable(drive, cmd) == 0) { + ide_map_sg(drive, cmd); return 1; } @@ -335,7 +330,7 @@ static int scc_dma_setup(ide_drive_t *drive) out_be32((void __iomem *)(hwif->dma_base + 8), hwif->dmatable_dma); /* specify r/w */ - out_be32((void __iomem *)hwif->dma_base, reading); + out_be32((void __iomem *)hwif->dma_base, rw); /* read DMA status for INTR & ERROR flags */ dma_stat = scc_dma_sff_read_status(hwif); |