• Bartlomiej Zolnierkiewicz's avatar
    ide: rework the code for selecting the best DMA transfer mode (v3) · 2d5eaa6d
    Bartlomiej Zolnierkiewicz authored
    Depends on the "ide: fix UDMA/MWDMA/SWDMA masks" patch.
    * add ide_hwif_t.udma_filter hook for filtering UDMA mask
      (use it in alim15x3, hpt366, siimage and serverworks drivers)
    * add ide_max_dma_mode() for finding best DMA mode for the device
      (loosely based on some older libata-core.c code)
    * convert ide_dma_speed() users to use ide_max_dma_mode()
    * make ide_rate_filter() take "ide_drive_t *drive" as an argument instead
      of "u8 mode" and teach it to how to use UDMA mask to do filtering
    * use ide_rate_filter() in hpt366 driver
    * remove no longer needed ide_dma_speed() and *_ratemask()
    * unexport eighty_ninty_three()
    * rename ->filter_udma_mask to ->udma_filter
      [ Suggested by Sergei Shtylyov <sshtylyov@ru.mvista.com>. ]
    * updated for scc_pata driver (fixes XFER_UDMA_6 filtering for user-space
      originated transfer mode change requests when 100MHz clock is used)
    Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>