From 26bcb879c03254545a19c6700fe5bcef6f21e7b1 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Thu, 11 Oct 2007 23:54:00 +0200 Subject: ide: add ide_set{_max}_pio() (take 4) * Add IDE_HFLAG_ABUSE_{PREFETCH,FAST_DEVSEL,DMA_MODES} flags and set them in ht6560, cmd640, cmd64x and sc1200 host drivers. * Add set_pio_mode_abuse() for checking if host driver has a non-standard ->tuneproc() implementation and use it in do_special(). * Add ide_set_pio() for setting PIO mode (it uses hwif->pio_mask to find the maximum PIO mode supported by the host), also add ide_set_max_pio() wrapper for ide_set_pio() to use for auto-tuning. Convert users of ->tuneproc to use ide_set{_max}_pio() where possible. This leaves only do_special(), set_using_pio(), ide_hwif_restore() and ide_set_pio() as a direct users of ->tuneproc. * Remove no longer needed ide_get_best_pio_mode() calls and printk-s reporting PIO mode selected from ->tuneproc implementations. * Rename ->tuneproc hook to ->set_pio_mode and make 'pio' argument const. * Remove stale comment from ide_config_drive_speed(). v2: * Fix "ata_" prefix (Noticed by Jeff). v3: * Minor cleanups/fixups per Sergei's suggestions. v4: * Fix compile problem in drivers/ide/pci/cmd640.c (Noticed by Andrew Morton). * Improve some ->set_pio_mode comments. Reviewed-by: Sergei Shtylyov Cc: Jeff Garzik Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-io.c | 39 +++++++++++++++++++++++++++++++++++---- 1 file changed, 35 insertions(+), 4 deletions(-) (limited to 'drivers/ide/ide-io.c') diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index aa9f5f0b1e6..9560a8f4a86 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -201,8 +201,7 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request * return do_rw_taskfile(drive, args); case idedisk_pm_restore_pio: /* Resume step 1 (restore PIO) */ - if (drive->hwif->tuneproc != NULL) - drive->hwif->tuneproc(drive, 255); + ide_set_max_pio(drive); /* * skip idedisk_pm_idle for ATAPI devices */ @@ -788,6 +787,30 @@ static ide_startstop_t ide_disk_special(ide_drive_t *drive) return ide_started; } +/* + * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away + */ +static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio) +{ + switch (req_pio) { + case 202: + case 201: + case 200: + case 102: + case 101: + case 100: + return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0; + case 9: + case 8: + return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0; + case 7: + case 6: + return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0; + default: + return 0; + } +} + /** * do_special - issue some special commands * @drive: drive the command is for @@ -805,9 +828,17 @@ static ide_startstop_t do_special (ide_drive_t *drive) printk("%s: do_special: 0x%02x\n", drive->name, s->all); #endif if (s->b.set_tune) { + ide_hwif_t *hwif = drive->hwif; + u8 req_pio = drive->tune_req; + s->b.set_tune = 0; - if (HWIF(drive)->tuneproc != NULL) - HWIF(drive)->tuneproc(drive, drive->tune_req); + + if (set_pio_mode_abuse(drive->hwif, req_pio)) { + if (hwif->set_pio_mode) + hwif->set_pio_mode(drive, req_pio); + } else + ide_set_pio(drive, req_pio); + return ide_stopped; } else { if (drive->media == ide_disk) -- cgit v1.2.3