From: Bartlomiej Zolnierkiewicz Date: Fri, 25 Jan 2008 21:17:10 +0000 (+0100) Subject: ide: remove unnecessary writes to HOB taskfile registers X-Git-Tag: v2.6.25-rc1~1236^2~42 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=a3bbb9d882dc94fe3a1361596ab9ce55d84059ea;p=linux-2.6-omap-h63xx.git ide: remove unnecessary writes to HOB taskfile registers * 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 --- diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c index f0a6a3d6d2d..e0bb0cfa7bd 100644 --- a/drivers/ide/ide-acpi.c +++ b/drivers/ide/ide-acpi.c @@ -386,6 +386,7 @@ static int taskfile_load_raw(ide_drive_t *drive, /* convert gtf to IDE Taskfile */ memcpy(&args.tf_array[7], >f->tfa, 7); + args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; if (ide_noacpitfs) { DEBPRINT("_GTF execution disabled\n"); diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c index 3e03d0c1a47..fc785e760bd 100644 --- a/drivers/ide/ide-disk.c +++ b/drivers/ide/ide-disk.c @@ -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); @@ -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 */ @@ -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); } @@ -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; @@ -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; @@ -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); } @@ -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; @@ -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, @@ -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; } diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 859cf7f4133..1526d79f87e 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -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); @@ -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); @@ -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); } diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c index 8a5a10fdcfc..7ae4a42cfa5 100644 --- a/drivers/ide/ide-taskfile.c +++ b/drivers/ide/ide-taskfile.c @@ -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; @@ -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; @@ -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;