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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-05-10 00:01:08 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-05-10 00:01:08 +0200 |
| commit | 2d5eaa6dd744a641e75503232a01f52d0768884c (patch) | |
| tree | 0736bd00ea3bd032d601d0a676c998cb043b877a /drivers/ide/pci/atiixp.c | |
| parent | 18137207236285989dfc0ee7f929b954199228f3 (diff) | |
| download | linux-2d5eaa6dd744a641e75503232a01f52d0768884c.tar.gz | |
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>
Diffstat (limited to 'drivers/ide/pci/atiixp.c')
| -rw-r--r-- | drivers/ide/pci/atiixp.c | 20 |
1 files changed, 2 insertions, 18 deletions
diff --git a/drivers/ide/pci/atiixp.c b/drivers/ide/pci/atiixp.c index 2d48af32e3f455..f7e80d6076d769 100644 --- a/drivers/ide/pci/atiixp.c +++ b/drivers/ide/pci/atiixp.c @@ -49,22 +49,6 @@ static int save_mdma_mode[4]; static DEFINE_SPINLOCK(atiixp_lock); /** - * atiixp_ratemask - compute rate mask for ATIIXP IDE - * @drive: IDE drive to compute for - * - * Returns the available modes for the ATIIXP IDE controller. - */ - -static u8 atiixp_ratemask(ide_drive_t *drive) -{ - u8 mode = 3; - - if (!eighty_ninty_three(drive)) - mode = min(mode, (u8)1); - return mode; -} - -/** * atiixp_dma_2_pio - return the PIO mode matching DMA * @xfer_rate: transfer speed * @@ -189,7 +173,7 @@ static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed) u16 tmp16; u8 speed, pio; - speed = ide_rate_filter(atiixp_ratemask(drive), xferspeed); + speed = ide_rate_filter(drive, xferspeed); spin_lock_irqsave(&atiixp_lock, flags); @@ -233,7 +217,7 @@ static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed) static int atiixp_config_drive_for_dma(ide_drive_t *drive) { - u8 speed = ide_dma_speed(drive, atiixp_ratemask(drive)); + u8 speed = ide_max_dma_mode(drive); if (!speed) return 0; |