Skip to content

Commit

Permalink
ide: remove unnecessary writes to HOB taskfile registers
Browse files Browse the repository at this point in the history 
* Set taskfile flags for REQ_TYPE_ATA_TASKFILE requests before
  adding the request to the queue.

* Cleanup execute_drive_cmd().

* Remove unnecessary writes to HOB taskfile registers when using
  LBA48 disk for the following cases:

  - Power Management requests
    (WIN_FLUSH_CACHE[_EXT], WIN_STANDBYNOW1, WIN_IDLEIMMEDIATE commands)

  - special commands (WIN_SPECIFY, WIN_RESTORE, WIN_SETMULT)

  - Host Protected Area support (WIN_READ_NATIVE_MAX, WIN_SET_MAX)

  - /proc/ide/ SMART support (WIN_SMART with SMART_ENABLE,
    SMART_READ_VALUES and SMART_READ_THRESHOLDS subcommands)

  - write cache enabling/disabling in ide-disk
    (WIN_SETFEATURES with SETFEATURES_{EN,DIS}_WCACHE)

  - write cache flushing in ide-disk (WIN_FLUSH_CACHE[_EXT])

  - acoustic management in ide-disk
    (WIN_SETFEATURES with SETFEATURES_{EN,DIS}_AAM)

  - door (un)locking in ide-disk (WIN_DOORLOCK, WIN_DOORUNLOCK)

  - /proc/ide/hd?/identify support (WIN_IDENTIFY)

  - ACPI _GTF taskfiles

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
  • Loading branch information
Bartlomiej Zolnierkiewicz committed Jan 25, 2008
1 parent 868e672 commit a3bbb9d
Show file tree
Hide file tree
Showing 4 changed files with 23 additions and 12 deletions.
1 change: 1 addition & 0 deletions drivers/ide/ide-acpi.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -386,6 +386,7 @@ static int taskfile_load_raw(ide_drive_t *drive,

/* convert gtf to IDE Taskfile */
memcpy(&args.tf_array[7], &gtf->tfa, 7);
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;

if (ide_noacpitfs) {
DEBPRINT("_GTF execution disabled\n");
Expand Down
13 changes: 13 additions & 0 deletions drivers/ide/ide-disk.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -304,6 +304,9 @@ static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
else
tf->command = WIN_READ_NATIVE_MAX;
tf->device = ATA_LBA;
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
if (lba48)
args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB);
/* submit command request */
ide_no_data_taskfile(drive, &args);

Expand Down Expand Up @@ -349,6 +352,9 @@ static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
tf->command = WIN_SET_MAX;
}
tf->device |= ATA_LBA;
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
if (lba48)
args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB);
/* submit command request */
ide_no_data_taskfile(drive, &args);
/* if OK, compute maximum address value */
Expand Down Expand Up @@ -497,6 +503,7 @@ static int smart_enable(ide_drive_t *drive)
tf->lbam = SMART_LCYL_PASS;
tf->lbah = SMART_HCYL_PASS;
tf->command = WIN_SMART;
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
return ide_no_data_taskfile(drive, &args);
}

Expand All @@ -511,6 +518,7 @@ static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd)
tf->lbam = SMART_LCYL_PASS;
tf->lbah = SMART_HCYL_PASS;
tf->command = WIN_SMART;
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
args.command_type = IDE_DRIVE_TASK_IN;
args.data_phase = TASKFILE_IN;
args.handler = &task_in_intr;
Expand Down Expand Up @@ -690,6 +698,7 @@ static int write_cache(ide_drive_t *drive, int arg)
args.tf.feature = arg ?
SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE;
args.tf.command = WIN_SETFEATURES;
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
err = ide_no_data_taskfile(drive, &args);
if (err == 0)
drive->wcache = arg;
Expand All @@ -709,6 +718,7 @@ static int do_idedisk_flushcache (ide_drive_t *drive)
args.tf.command = WIN_FLUSH_CACHE_EXT;
else
args.tf.command = WIN_FLUSH_CACHE;
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
return ide_no_data_taskfile(drive, &args);
}

Expand All @@ -723,6 +733,7 @@ static int set_acoustic (ide_drive_t *drive, int arg)
args.tf.feature = arg ? SETFEATURES_EN_AAM : SETFEATURES_DIS_AAM;
args.tf.nsect = arg;
args.tf.command = WIN_SETFEATURES;
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
ide_no_data_taskfile(drive, &args);
drive->acoustic = arg;
return 0;
Expand Down Expand Up @@ -985,6 +996,7 @@ static int idedisk_open(struct inode *inode, struct file *filp)
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tf.command = WIN_DOORLOCK;
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
check_disk_change(inode->i_bdev);
/*
* Ignore the return code from door_lock,
Expand All @@ -1010,6 +1022,7 @@ static int idedisk_release(struct inode *inode, struct file *filp)
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tf.command = WIN_DOORUNLOCK;
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
if (drive->doorlocking && ide_no_data_taskfile(drive, &args))
drive->doorlocking = 0;
}
Expand Down
12 changes: 0 additions & 12 deletions drivers/ide/ide-io.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -233,8 +233,6 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *

out_do_tf:
args->tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
if (drive->addressing == 1)
args->tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB);
args->command_type = IDE_DRIVE_TASK_NO_DATA;
args->handler = task_no_data_intr;
return do_rw_taskfile(drive, args);
Expand Down Expand Up @@ -711,8 +709,6 @@ static ide_startstop_t ide_disk_special(ide_drive_t *drive)
}

args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
if (drive->addressing == 1)
args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB);

do_rw_taskfile(drive, &args);

Expand Down Expand Up @@ -871,17 +867,9 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
break;
}

task->tf_flags |= IDE_TFLAG_OUT_DEVICE;
if (drive->addressing == 1)
task->tf_flags |= IDE_TFLAG_LBA48;

if (task->tf_flags & IDE_TFLAG_FLAGGED)
return flagged_taskfile(drive, task);

task->tf_flags |= IDE_TFLAG_OUT_TF;
if (task->tf_flags & IDE_TFLAG_LBA48)
task->tf_flags |= IDE_TFLAG_OUT_HOB;

return do_rw_taskfile(drive, task);
}

Expand Down
9 changes: 9 additions & 0 deletions drivers/ide/ide-taskfile.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -126,6 +126,7 @@ int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
args.tf.command = WIN_IDENTIFY;
else
args.tf.command = WIN_PIDENTIFY;
args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
args.command_type = IDE_DRIVE_TASK_IN;
args.data_phase = TASKFILE_IN;
args.handler = &task_in_intr;
Expand Down Expand Up @@ -619,6 +620,10 @@ int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
args.data_phase = req_task->data_phase;
args.command_type = req_task->req_cmd;

args.tf_flags = IDE_TFLAG_OUT_DEVICE;
if (drive->addressing == 1)
args.tf_flags |= IDE_TFLAG_LBA48;

if (req_task->out_flags.all) {
args.tf_flags |= IDE_TFLAG_FLAGGED;

Expand All @@ -644,6 +649,10 @@ int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
args.tf_flags |= IDE_TFLAG_OUT_LBAM;
if (req_task->out_flags.b.hcyl)
args.tf_flags |= IDE_TFLAG_OUT_LBAH;
} else {
args.tf_flags |= IDE_TFLAG_OUT_TF;
if (args.tf_flags & IDE_TFLAG_LBA48)
args.tf_flags |= IDE_TFLAG_OUT_HOB;
}

drive->io_32bit = 0;
Expand Down

0 comments on commit a3bbb9d

Please sign in to comment.