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ide: rework the code for selecting the best DMA transfer mode (v3)

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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()

v2:
* rename ->filter_udma_mask to ->udma_filter
  [ Suggested by Sergei Shtylyov <sshtylyov@ru.mvista.com>. ]

v3:
* 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: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz
2007-05-10 00:01:08 +02:00
parent 1813720723
commit 2d5eaa6dd7
27 changed files with 236 additions and 574 deletions
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1
drivers/ide/ide.c
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@@ -477,6 +477,7 @@ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
hwif->tuneproc = tmp_hwif->tuneproc;
hwif->speedproc = tmp_hwif->speedproc;
hwif->udma_filter = tmp_hwif->udma_filter;
hwif->selectproc = tmp_hwif->selectproc;
hwif->reset_poll = tmp_hwif->reset_poll;
hwif->pre_reset = tmp_hwif->pre_reset;