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    SubjectRe: [PATCH] make __ide_dma_off() generic and remove ide_hwif_t->ide_dma_off
    Date
    On Wednesday 11 of February 2004 13:19, Andre Hedrick wrote:
    > Bartlomiej,
    >
    > __ide_dma_count
    >
    > This is for VDMA, PIO over DMA.

    This *supposes* to be for VDMA, but since its introduction in kernel 2.5.35
    (released on 15-Sep-2002!) it does *nothing*.

    > When the transport moves to only MMIO, PIO operations are tunneled.
    > Just a little hit.
    >
    > Andre Hedrick
    > LAD Storage Consulting Group
    >
    > On Mon, 9 Feb 2004, Bartlomiej Zolnierkiewicz wrote:
    > > Incremental to "[PATCH] remove __ide_dma_count() and
    > > ide_hwif_t->ide_dma_count".
    > >
    > > Move ide-dma.c:__ide_dma_off() outside of #ifdef
    > > CONFIG_BLK_DEV_IDEDMA_PCI, so it can be used for all DMA capable hosts.
    > > Remove ide_hwif_t->ide_dma_off.

    From the previous mail:

    [PATCH] remove __ide_dma_count() and ide_hwif_t->ide_dma_count

    Incremental to "[PATCH] remove ide_dma_{good,bad}_drive from ide_hwif_t".

    ->ide_dma_count() was introduced in kernel 2.5.35 and was meant to add support
    for host FIFO counters (for VDMA), but is only a wrapper for ->ide_dma_begin()
    (even for siimage.c b/c SIIMAGE_VIRTUAL_DMAPIO is undefined).

    Moreover it should be possible to add VDMA code directly to ->ide_dma_begin().

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