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

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>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/ide/pci/triflex.c b/drivers/ide/pci/triflex.c
index 5e06179c3469..8a877235b949 100644
--- a/drivers/ide/pci/triflex.c
+++ b/drivers/ide/pci/triflex.c
@@ -48,7 +48,7 @@ static int triflex_tune_chipset(ide_drive_t *drive, u8 xferspeed)
         u16 timing = 0;
         u32 triflex_timings = 0;
         u8 unit = (drive->select.b.unit & 0x01);
-        u8 speed = ide_rate_filter(0, xferspeed);
+        u8 speed = ide_rate_filter(drive, xferspeed);
         
         pci_read_config_dword(dev, channel_offset, &triflex_timings);
         
@@ -102,7 +102,7 @@ static void triflex_tune_drive(ide_drive_t *drive, u8 pio)
 
 static int triflex_config_drive_for_dma(ide_drive_t *drive)
 {
-        int speed = ide_dma_speed(drive, 0); /* No ultra speeds */
+        u8 speed = ide_max_dma_mode(drive);
 
         if (!speed)
                 return 0;