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ide: add ide_set{_max}_pio() (take 4)

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* 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>
This commit is contained in:
Bartlomiej Zolnierkiewicz
2007-10-11 23:54:00 +02:00
parent 842c19ad6f
commit 26bcb879c0
45 changed files with 318 additions and 326 deletions
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39
drivers/ide/ide-io.c
View File

@@ -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)