Re: [PATCH 2.6.11-rc3 08/08] ide: remove REQ_DRIVE_CMD handling

From: Tejun Heo
Date: Fri Mar 04 2005 - 21:46:10 EST


08_ide_remove_REQ_DRIVE_CMD.patch

Remove REQ_DRIVE_CMD handling. ide_init_drive_cmd() now
defaults to REQ_DRIVE_TASKFILE (now the only drive command :-).

Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>

drivers/block/ll_rw_blk.c | 1
drivers/ide/ide-disk.c | 1
drivers/ide/ide-io.c | 132 +++++-----------------------------------------
drivers/ide/ide-lib.c | 8 --
include/linux/blkdev.h | 2
5 files changed, 17 insertions(+), 127 deletions(-)

Index: linux-taskfile-ng/drivers/block/ll_rw_blk.c
===================================================================
--- linux-taskfile-ng.orig/drivers/block/ll_rw_blk.c 2005-03-05 10:37:51.398401518 +0900
+++ linux-taskfile-ng/drivers/block/ll_rw_blk.c 2005-03-05 10:47:00.319763980 +0900
@@ -850,7 +850,6 @@ static char *rq_flags[] = {
"REQ_FAILED",
"REQ_QUIET",
"REQ_SPECIAL",
- "REQ_DRIVE_CMD",
"REQ_DRIVE_TASKFILE",
"REQ_PREEMPT",
"REQ_PM_SUSPEND",
Index: linux-taskfile-ng/drivers/ide/ide-disk.c
===================================================================
--- linux-taskfile-ng.orig/drivers/ide/ide-disk.c 2005-03-05 10:46:59.684863236 +0900
+++ linux-taskfile-ng/drivers/ide/ide-disk.c 2005-03-05 10:47:00.319763980 +0900
@@ -638,7 +638,6 @@ static int set_multcount(ide_drive_t *dr
if (drive->special.b.set_multmode)
return -EBUSY;
ide_init_drive_cmd (&rq);
- rq.flags = REQ_DRIVE_CMD;
drive->mult_req = arg;
drive->special.b.set_multmode = 1;
(void) ide_do_drive_cmd (drive, &rq, ide_wait);
Index: linux-taskfile-ng/drivers/ide/ide-io.c
===================================================================
--- linux-taskfile-ng.orig/drivers/ide/ide-io.c 2005-03-05 10:46:59.685863080 +0900
+++ linux-taskfile-ng/drivers/ide/ide-io.c 2005-03-05 10:47:00.320763824 +0900
@@ -97,7 +97,7 @@ static struct request *ide_queue_flush_c
ide_task_init_flush(drive, task);

ide_init_drive_cmd(flush_rq);
- flush_rq->flags = REQ_DRIVE_TASKFILE | REQ_STARTED;
+ flush_rq->flags = REQ_STARTED;
flush_rq->nr_sectors = rq->nr_sectors;
flush_rq->special = task;

@@ -429,7 +429,6 @@ static void ide_complete_barrier(ide_dri

void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err)
{
- ide_hwif_t *hwif = HWIF(drive);
unsigned long flags;
struct request *rq;

@@ -437,17 +436,7 @@ void ide_end_drive_cmd (ide_drive_t *dri
rq = HWGROUP(drive)->rq;
spin_unlock_irqrestore(&ide_lock, flags);

- if (rq->flags & REQ_DRIVE_CMD) {
- u8 *args = (u8 *) rq->buffer;
- if (rq->errors == 0)
- rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT);
-
- if (args) {
- args[0] = stat;
- args[1] = err;
- args[2] = hwif->INB(IDE_NSECTOR_REG);
- }
- } else if (rq->flags & REQ_DRIVE_TASKFILE) {
+ if (rq->flags & REQ_DRIVE_TASKFILE) {
ide_task_t *args = (ide_task_t *) rq->special;
if (rq->errors == 0)
rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT);
@@ -622,7 +611,7 @@ ide_startstop_t ide_error (ide_drive_t *
return ide_stopped;

/* retry only "normal" I/O: */
- if (rq->flags & (REQ_DRIVE_CMD | REQ_DRIVE_TASKFILE)) {
+ if (rq->flags & REQ_DRIVE_TASKFILE) {
rq->errors = 1;
ide_end_drive_cmd(drive, stat, err);
return ide_stopped;
@@ -673,7 +662,7 @@ ide_startstop_t ide_abort(ide_drive_t *d
return ide_stopped;

/* retry only "normal" I/O: */
- if (rq->flags & (REQ_DRIVE_CMD | REQ_DRIVE_TASKFILE)) {
+ if (rq->flags & REQ_DRIVE_TASKFILE) {
rq->errors = 1;
ide_end_drive_cmd(drive, BUSY_STAT, 0);
return ide_stopped;
@@ -688,63 +677,6 @@ ide_startstop_t ide_abort(ide_drive_t *d
return __ide_abort(drive, rq);
}

-/**
- * ide_cmd - issue a simple drive command
- * @drive: drive the command is for
- * @cmd: command byte
- * @nsect: sector byte
- * @handler: handler for the command completion
- *
- * Issue a simple drive command with interrupts.
- * The drive must be selected beforehand.
- */
-
-static void ide_cmd (ide_drive_t *drive, u8 cmd, u8 nsect,
- ide_handler_t *handler)
-{
- ide_hwif_t *hwif = HWIF(drive);
- if (IDE_CONTROL_REG)
- hwif->OUTB(drive->ctl,IDE_CONTROL_REG); /* clear nIEN */
- SELECT_MASK(drive,0);
- hwif->OUTB(nsect,IDE_NSECTOR_REG);
- ide_execute_command(drive, cmd, handler, WAIT_CMD, NULL);
-}
-
-/**
- * drive_cmd_intr - drive command completion interrupt
- * @drive: drive the completion interrupt occurred on
- *
- * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD.
- * We do any necessary daya reading and then wait for the drive to
- * go non busy. At that point we may read the error data and complete
- * the request
- */
-
-static ide_startstop_t drive_cmd_intr (ide_drive_t *drive)
-{
- struct request *rq = HWGROUP(drive)->rq;
- ide_hwif_t *hwif = HWIF(drive);
- u8 *args = (u8 *) rq->buffer;
- u8 stat = hwif->INB(IDE_STATUS_REG);
- int retries = 10;
-
- local_irq_enable();
- if ((stat & DRQ_STAT) && args && args[3]) {
- u8 io_32bit = drive->io_32bit;
- drive->io_32bit = 0;
- hwif->ata_input_data(drive, &args[4], args[3] * SECTOR_WORDS);
- drive->io_32bit = io_32bit;
- while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
- udelay(100);
- }
-
- if (!OK_STAT(stat, READY_STAT, BAD_STAT))
- return ide_error(drive, "drive_cmd", stat);
- /* calls ide_end_drive_cmd */
- ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
- return ide_stopped;
-}
-
static void ide_init_specify_cmd(ide_drive_t *drive, ide_task_t *task)
{
struct ata_taskfile *tf = &task->tf;
@@ -886,53 +818,23 @@ EXPORT_SYMBOL_GPL(ide_init_sg_cmd);
* all commands to finish. Don't do this as that is due to change
*/

-static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
- struct request *rq)
+static ide_startstop_t execute_drive_cmd(ide_drive_t *drive, struct request *rq)
{
- ide_hwif_t *hwif = HWIF(drive);
- if (rq->flags & REQ_DRIVE_TASKFILE) {
- ide_task_t *args = rq->special;
-
- if (!args)
- goto done;
-
- return do_rw_taskfile(drive, args);
- } else if (rq->flags & REQ_DRIVE_CMD) {
- u8 *args = rq->buffer;
+ ide_hwif_t *hwif = drive->hwif;
+ ide_task_t *task = rq->special;

- if (!args)
- goto done;
-#ifdef DEBUG
- printk("%s: DRIVE_CMD ", drive->name);
- printk("cmd=0x%02x ", args[0]);
- printk("sc=0x%02x ", args[1]);
- printk("fr=0x%02x ", args[2]);
- printk("xx=0x%02x\n", args[3]);
-#endif
- if (args[0] == WIN_SMART) {
- hwif->OUTB(0x4f, IDE_LCYL_REG);
- hwif->OUTB(0xc2, IDE_HCYL_REG);
- hwif->OUTB(args[2],IDE_FEATURE_REG);
- hwif->OUTB(args[1],IDE_SECTOR_REG);
- ide_cmd(drive, args[0], args[3], &drive_cmd_intr);
- return ide_started;
- }
- hwif->OUTB(args[2],IDE_FEATURE_REG);
- ide_cmd(drive, args[0], args[1], &drive_cmd_intr);
- return ide_started;
- }
+ if (task)
+ return do_rw_taskfile(drive, task);

-done:
/*
* NULL is actually a valid way of waiting for
* all current requests to be flushed from the queue.
*/
-#ifdef DEBUG
- printk("%s: DRIVE_CMD (null)\n", drive->name);
-#endif
+
ide_end_drive_cmd(drive,
- hwif->INB(IDE_STATUS_REG),
- hwif->INB(IDE_ERROR_REG));
+ hwif->INB(IDE_STATUS_REG),
+ hwif->INB(IDE_ERROR_REG));
+
return ide_stopped;
}

@@ -1010,9 +912,7 @@ static ide_startstop_t start_request (id
if (!drive->special.all) {
ide_driver_t *drv;

- if (rq->flags & REQ_DRIVE_CMD)
- return execute_drive_cmd(drive, rq);
- else if (rq->flags & REQ_DRIVE_TASKFILE)
+ if (rq->flags & REQ_DRIVE_TASKFILE)
return execute_drive_cmd(drive, rq);
else if (blk_pm_request(rq)) {
#ifdef DEBUG_PM
@@ -1662,10 +1562,10 @@ irqreturn_t ide_intr (int irq, void *dev
* nasty suprise.
*/

-void ide_init_drive_cmd (struct request *rq)
+void ide_init_drive_cmd(struct request *rq)
{
memset(rq, 0, sizeof(*rq));
- rq->flags = REQ_DRIVE_CMD;
+ rq->flags = REQ_DRIVE_TASKFILE;
rq->ref_count = 1;
}

Index: linux-taskfile-ng/drivers/ide/ide-lib.c
===================================================================
--- linux-taskfile-ng.orig/drivers/ide/ide-lib.c 2005-03-05 10:37:51.398401518 +0900
+++ linux-taskfile-ng/drivers/ide/ide-lib.c 2005-03-05 10:47:00.321763668 +0900
@@ -458,13 +458,7 @@ static void ide_dump_opcode(ide_drive_t
spin_unlock(&ide_lock);
if (!rq)
return;
- if (rq->flags & REQ_DRIVE_CMD) {
- char *args = rq->buffer;
- if (args) {
- opcode = args[0];
- found = 1;
- }
- } else if (rq->flags & REQ_DRIVE_TASKFILE) {
+ if (rq->flags & REQ_DRIVE_TASKFILE) {
ide_task_t *args = rq->special;
if (args) {
opcode = args->tf.command;
Index: linux-taskfile-ng/include/linux/blkdev.h
===================================================================
--- linux-taskfile-ng.orig/include/linux/blkdev.h 2005-03-05 10:37:51.398401518 +0900
+++ linux-taskfile-ng/include/linux/blkdev.h 2005-03-05 10:47:00.321763668 +0900
@@ -201,7 +201,6 @@ enum rq_flag_bits {
__REQ_FAILED, /* set if the request failed */
__REQ_QUIET, /* don't worry about errors */
__REQ_SPECIAL, /* driver suplied command */
- __REQ_DRIVE_CMD,
__REQ_DRIVE_TASKFILE,
__REQ_PREEMPT, /* set for "ide_preempt" requests */
__REQ_PM_SUSPEND, /* suspend request */
@@ -227,7 +226,6 @@ enum rq_flag_bits {
#define REQ_FAILED (1 << __REQ_FAILED)
#define REQ_QUIET (1 << __REQ_QUIET)
#define REQ_SPECIAL (1 << __REQ_SPECIAL)
-#define REQ_DRIVE_CMD (1 << __REQ_DRIVE_CMD)
#define REQ_DRIVE_TASKFILE (1 << __REQ_DRIVE_TASKFILE)
#define REQ_PREEMPT (1 << __REQ_PREEMPT)
#define REQ_PM_SUSPEND (1 << __REQ_PM_SUSPEND)
-
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