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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-12 01:54:00 +0400 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-12 01:54:00 +0400 |
| commit | 26bcb879c03254545a19c6700fe5bcef6f21e7b1 (patch) | |
| tree | dc35f1a7d7860fe0de268ff92189ff0884b689d3 /drivers/ide/ide-io.c | |
| parent | 842c19ad6fc0dbd9ac9d2f8527466201802934cf (diff) | |
| download | linux-26bcb879c03254545a19c6700fe5bcef6f21e7b1.tar.xz | |
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 <sshtylyov@ru.mvista.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-io.c')
| -rw-r--r-- | drivers/ide/ide-io.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index aa9f5f0b1e67..9560a8f4a86c 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) |