diff options
Diffstat (limited to 'drivers/ide/ide-dma.c')
| -rw-r--r-- | drivers/ide/ide-dma.c | 93 |
1 files changed, 42 insertions, 51 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index 5fe1d72ab45..6000c08f51b 100644 --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -135,25 +135,6 @@ static const struct drive_list_entry drive_blacklist [] = { }; /** - * ide_in_drive_list - look for drive in black/white list - * @id: drive identifier - * @drive_table: list to inspect - * - * Look for a drive in the blacklist and the whitelist tables - * Returns 1 if the drive is found in the table. - */ - -int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table) -{ - for ( ; drive_table->id_model ; drive_table++) - if ((!strcmp(drive_table->id_model, id->model)) && - (!drive_table->id_firmware || - strstr(id->fw_rev, drive_table->id_firmware))) - return 1; - return 0; -} - -/** * ide_dma_intr - IDE DMA interrupt handler * @drive: the drive the interrupt is for * @@ -349,9 +330,17 @@ EXPORT_SYMBOL_GPL(ide_destroy_dmatable); static int config_drive_for_dma (ide_drive_t *drive) { + ide_hwif_t *hwif = drive->hwif; struct hd_driveid *id = drive->id; - if ((id->capability & 1) && drive->hwif->autodma) { + /* consult the list of known "bad" drives */ + if (__ide_dma_bad_drive(drive)) + return -1; + + if (drive->media != ide_disk && hwif->atapi_dma == 0) + return -1; + + if ((id->capability & 1) && drive->autodma) { /* * Enable DMA on any drive that has * UltraDMA (mode 0/1/2/3/4/5/6) enabled @@ -514,20 +503,6 @@ int __ide_dma_on (ide_drive_t *drive) EXPORT_SYMBOL(__ide_dma_on); /** - * __ide_dma_check - check DMA setup - * @drive: drive to check - * - * Don't use - due for extermination - */ - -int __ide_dma_check (ide_drive_t *drive) -{ - return config_drive_for_dma(drive); -} - -EXPORT_SYMBOL(__ide_dma_check); - -/** * ide_dma_setup - begin a DMA phase * @drive: target device * @@ -678,7 +653,7 @@ static const u8 xfer_mode_bases[] = { XFER_SW_DMA_0, }; -static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base) +static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode) { struct hd_driveid *id = drive->id; ide_hwif_t *hwif = drive->hwif; @@ -689,17 +664,28 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base) if ((id->field_valid & 4) == 0) break; - mask = id->dma_ultra & hwif->ultra_mask; - if (hwif->udma_filter) - mask &= hwif->udma_filter(drive); + mask = hwif->udma_filter(drive); + else + mask = hwif->ultra_mask; + mask &= id->dma_ultra; - if ((mask & 0x78) && (eighty_ninty_three(drive) == 0)) - mask &= 0x07; + /* + * avoid false cable warning from eighty_ninty_three() + */ + if (req_mode > XFER_UDMA_2) { + if ((mask & 0x78) && (eighty_ninty_three(drive) == 0)) + mask &= 0x07; + } break; case XFER_MW_DMA_0: - if (id->field_valid & 2) - mask = id->dma_mword & hwif->mwdma_mask; + if ((id->field_valid & 2) == 0) + break; + if (hwif->mdma_filter) + mask = hwif->mdma_filter(drive); + else + mask = hwif->mwdma_mask; + mask &= id->dma_mword; break; case XFER_SW_DMA_0: if (id->field_valid & 2) { @@ -728,15 +714,18 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base) } /** - * ide_max_dma_mode - compute DMA speed + * ide_find_dma_mode - compute DMA speed * @drive: IDE device + * @req_mode: requested mode + * + * Checks the drive/host capabilities and finds the speed to use for + * the DMA transfer. The speed is then limited by the requested mode. * - * Checks the drive capabilities and returns the speed to use - * for the DMA transfer. Returns 0 if the drive is incapable - * of DMA transfers. + * Returns 0 if the drive/host combination is incapable of DMA transfers + * or if the requested mode is not a DMA mode. */ -u8 ide_max_dma_mode(ide_drive_t *drive) +u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode) { ide_hwif_t *hwif = drive->hwif; unsigned int mask; @@ -747,7 +736,9 @@ u8 ide_max_dma_mode(ide_drive_t *drive) return 0; for (i = 0; i < ARRAY_SIZE(xfer_mode_bases); i++) { - mask = ide_get_mode_mask(drive, xfer_mode_bases[i]); + if (req_mode < xfer_mode_bases[i]) + continue; + mask = ide_get_mode_mask(drive, xfer_mode_bases[i], req_mode); x = fls(mask) - 1; if (x >= 0) { mode = xfer_mode_bases[i] + x; @@ -757,10 +748,10 @@ u8 ide_max_dma_mode(ide_drive_t *drive) printk(KERN_DEBUG "%s: selected mode 0x%x\n", drive->name, mode); - return mode; + return min(mode, req_mode); } -EXPORT_SYMBOL_GPL(ide_max_dma_mode); +EXPORT_SYMBOL_GPL(ide_find_dma_mode); int ide_tune_dma(ide_drive_t *drive) { @@ -1021,7 +1012,7 @@ void ide_setup_dma (ide_hwif_t *hwif, unsigned long dma_base, unsigned int num_p if (!hwif->dma_host_on) hwif->dma_host_on = &ide_dma_host_on; if (!hwif->ide_dma_check) - hwif->ide_dma_check = &__ide_dma_check; + hwif->ide_dma_check = &config_drive_for_dma; if (!hwif->dma_setup) hwif->dma_setup = &ide_dma_setup; if (!hwif->dma_exec_cmd) |