ide: remove ->ide_dma_check (take 2)

* Add IDE_HFLAG_TRUST_BIOS_FOR_DMA host flag for host drivers that depend
  on BIOS for programming device/controller for DMA.  Set it in cy82c693,
  generic, ns87415, opti621 and trm290 host drivers.

* Add IDE_HFLAG_VDMA host flag for host drivers using VDMA.  Set it in cs5520
  host driver.

* Teach ide_tune_dma() about IDE_HFLAG_TRUST_BIOS_FOR_DMA flag.

* Add generic ide_dma_check() helper and remove all open coded ->ide_dma_check
  implementations.  Fix all places checking for presence of ->ide_dma_check
  hook to check for ->ide_dma_on instead.

* Remove no longer needed code from config_drive_for_dma().

* Make ide_tune_dma() static.

v2:
* Fix config_drive_for_dma() return values.

* Fix ide-dma.c build for CONFIG_BLK_DEV_IDEDMA_PCI=n by adding
  dummy config_drive_for_dma() inline.

* Fix IDE_HFLAG_TRUST_BIOS_FOR_DMA handling in ide_dma_check().

* Fix init_hwif_it8213() comment.

There should be no functionality changes caused by this patch.

Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/ide/pci/generic.c b/drivers/ide/pci/generic.c
index 48caa468b76..e8156c1ba63 100644
--- a/drivers/ide/pci/generic.c
+++ b/drivers/ide/pci/generic.c
@@ -97,77 +97,92 @@ static ide_pci_device_t generic_chipsets[] __devinitdata = {
                 .init_hwif      = init_hwif_generic,
                 .autodma        = AUTODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 1 */
                 .name           = "NS87410",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = AUTODMA,
                 .enablebits     = {{0x43,0x08,0x08}, {0x47,0x08,0x08}},
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 2 */
                 .name           = "SAMURAI",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = AUTODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 3 */
                 .name           = "HT6565",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = AUTODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 4 */
                 .name           = "UM8673F",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = NODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 5 */
                 .name           = "UM8886A",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = NODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 6 */
                 .name           = "UM8886BF",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = NODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 7 */
                 .name           = "HINT_IDE",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = AUTODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 8 */
                 .name           = "VIA_IDE",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = NOAUTODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 9 */
                 .name           = "OPTI621V",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = NOAUTODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 10 */
                 .name           = "VIA8237SATA",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = AUTODMA,
                 .bootable       = OFF_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 11 */
                 .name           = "Piccolo0102",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = NOAUTODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 12 */
                 .name           = "Piccolo0103",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = NOAUTODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 13 */
                 .name           = "Piccolo0105",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = NOAUTODMA,
                 .bootable       = ON_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         },{     /* 14 */
                 .name           = "Revolution",
                 .init_hwif      = init_hwif_generic,
                 .autodma        = AUTODMA,
                 .bootable       = OFF_BOARD,
+                .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
         }
 };