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Subject[patch][2/9] ide: unify taskfile single/multiple PIO code
Date

[patch] ide: unify taskfile single/multiple PIO code

Make the actual use of hwif->data_phase.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
---

linux-2.6.9-rc1-bk10-bzolnier/drivers/ide/ide-disk.c | 9
linux-2.6.9-rc1-bk10-bzolnier/drivers/ide/ide-taskfile.c | 155 ++++-----------
linux-2.6.9-rc1-bk10-bzolnier/include/linux/ide.h | 3
3 files changed, 53 insertions(+), 114 deletions(-)

diff -puN drivers/ide/ide-disk.c~ide_tf_multi_pio drivers/ide/ide-disk.c
--- linux-2.6.9-rc1-bk10/drivers/ide/ide-disk.c~ide_tf_multi_pio 2004-09-05 19:47:57.977443888 +0200
+++ linux-2.6.9-rc1-bk10-bzolnier/drivers/ide/ide-disk.c 2004-09-05 19:47:58.000440392 +0200
@@ -496,27 +496,24 @@ static u8 get_command(ide_drive_t *drive
task->command_type = IDE_DRIVE_TASK_IN;
if (drive->using_dma)
return lba48 ? WIN_READDMA_EXT : WIN_READDMA;
+ task->handler = &task_in_intr;
if (drive->mult_count) {
task->data_phase = TASKFILE_MULTI_IN;
- task->handler = &task_mulin_intr;
return lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD;
}
task->data_phase = TASKFILE_IN;
- task->handler = &task_in_intr;
return lba48 ? WIN_READ_EXT : WIN_READ;
} else {
task->command_type = IDE_DRIVE_TASK_RAW_WRITE;
if (drive->using_dma)
return lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA;
+ task->prehandler = &pre_task_out_intr;
+ task->handler = &task_out_intr;
if (drive->mult_count) {
task->data_phase = TASKFILE_MULTI_OUT;
- task->prehandler = &pre_task_mulout_intr;
- task->handler = &task_mulout_intr;
return lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE;
}
task->data_phase = TASKFILE_OUT;
- task->prehandler = &pre_task_out_intr;
- task->handler = &task_out_intr;
return lba48 ? WIN_WRITE_EXT : WIN_WRITE;
}
}
diff -puN drivers/ide/ide-taskfile.c~ide_tf_multi_pio drivers/ide/ide-taskfile.c
--- linux-2.6.9-rc1-bk10/drivers/ide/ide-taskfile.c~ide_tf_multi_pio 2004-09-05 19:47:57.979443584 +0200
+++ linux-2.6.9-rc1-bk10-bzolnier/drivers/ide/ide-taskfile.c 2004-09-05 19:47:58.002440088 +0200
@@ -368,12 +368,44 @@ static u8 wait_drive_not_busy(ide_drive_
return stat;
}

+static inline void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
+ unsigned int write)
+{
+ switch (drive->hwif->data_phase) {
+ case TASKFILE_MULTI_IN:
+ case TASKFILE_MULTI_OUT:
+ task_multi_sectors(drive, rq, write);
+ break;
+ default:
+ task_sectors(drive, rq, 1, write);
+ break;
+ }
+}
+
#ifdef CONFIG_IDE_TASKFILE_IO
static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
- const char *s, u8 stat, unsigned cur_bad)
+ const char *s, u8 stat)
{
if (rq->bio) {
- int sectors = rq->hard_nr_sectors - rq->nr_sectors - cur_bad;
+ int sectors = rq->hard_nr_sectors - rq->nr_sectors;
+
+ switch (drive->hwif->data_phase) {
+ case TASKFILE_IN:
+ if (rq->nr_sectors)
+ break;
+ /* fall through */
+ case TASKFILE_OUT:
+ sectors--;
+ break;
+ case TASKFILE_MULTI_IN:
+ if (rq->nr_sectors)
+ break;
+ /* fall through */
+ case TASKFILE_MULTI_OUT:
+ sectors -= drive->mult_count;
+ default:
+ break;
+ }

if (sectors > 0)
drive->driver->end_request(drive, 1, sectors);
@@ -381,7 +413,7 @@ static ide_startstop_t task_error(ide_dr
return drive->driver->error(drive, s, stat);
}
#else
-# define task_error(d, rq, s, stat, cur_bad) drive->driver->error(d, s, stat)
+# define task_error(d, rq, s, stat) drive->driver->error(d, s, stat)
#endif

static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
@@ -399,7 +431,7 @@ static void task_end_request(ide_drive_t
}

/*
- * Handler for command with PIO data-in phase (Read).
+ * Handler for command with PIO data-in phase (Read/Read Multiple).
*/
ide_startstop_t task_in_intr (ide_drive_t *drive)
{
@@ -408,19 +440,19 @@ ide_startstop_t task_in_intr (ide_drive_

if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
if (stat & (ERR_STAT | DRQ_STAT))
- return task_error(drive, rq, __FUNCTION__, stat, 0);
+ return task_error(drive, rq, __FUNCTION__, stat);
/* No data yet, so wait for another IRQ. */
ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}

- task_sectors(drive, rq, 1, IDE_PIO_IN);
+ ide_pio_datablock(drive, rq, 0);

/* If it was the last datablock check status and finish transfer. */
if (!rq->nr_sectors) {
stat = wait_drive_not_busy(drive);
if (!OK_STAT(stat, 0, BAD_R_STAT))
- return task_error(drive, rq, __FUNCTION__, stat, 1);
+ return task_error(drive, rq, __FUNCTION__, stat);
task_end_request(drive, rq, stat);
return ide_stopped;
}
@@ -433,41 +465,7 @@ ide_startstop_t task_in_intr (ide_drive_
EXPORT_SYMBOL(task_in_intr);

/*
- * Handler for command with PIO data-in phase (Read Multiple).
- */
-ide_startstop_t task_mulin_intr (ide_drive_t *drive)
-{
- struct request *rq = HWGROUP(drive)->rq;
- u8 stat = HWIF(drive)->INB(IDE_STATUS_REG);
-
- if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
- if (stat & (ERR_STAT | DRQ_STAT))
- return task_error(drive, rq, __FUNCTION__, stat, 0);
- /* No data yet, so wait for another IRQ. */
- ide_set_handler(drive, &task_mulin_intr, WAIT_WORSTCASE, NULL);
- return ide_started;
- }
-
- task_multi_sectors(drive, rq, IDE_PIO_IN);
-
- /* If it was the last datablock check status and finish transfer. */
- if (!rq->nr_sectors) {
- stat = wait_drive_not_busy(drive);
- if (!OK_STAT(stat, 0, BAD_R_STAT))
- return task_error(drive, rq, __FUNCTION__, stat, drive->mult_count);
- task_end_request(drive, rq, stat);
- return ide_stopped;
- }
-
- /* Still data left to transfer. */
- ide_set_handler(drive, &task_mulin_intr, WAIT_WORSTCASE, NULL);
-
- return ide_started;
-}
-EXPORT_SYMBOL(task_mulin_intr);
-
-/*
- * Handler for command with PIO data-out phase (Write).
+ * Handler for command with PIO data-out phase (Write/Write Multiple).
*/
ide_startstop_t task_out_intr (ide_drive_t *drive)
{
@@ -476,11 +474,11 @@ ide_startstop_t task_out_intr (ide_drive

stat = HWIF(drive)->INB(IDE_STATUS_REG);
if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
- return task_error(drive, rq, __FUNCTION__, stat, 1);
+ return task_error(drive, rq, __FUNCTION__, stat);

/* Deal with unexpected ATA data phase. */
if (((stat & DRQ_STAT) == 0) ^ !rq->nr_sectors)
- return task_error(drive, rq, __FUNCTION__, stat, 1);
+ return task_error(drive, rq, __FUNCTION__, stat);

if (!rq->nr_sectors) {
task_end_request(drive, rq, stat);
@@ -488,7 +486,7 @@ ide_startstop_t task_out_intr (ide_drive
}

/* Still data left to transfer. */
- task_sectors(drive, rq, 1, IDE_PIO_OUT);
+ ide_pio_datablock(drive, rq, 1);
ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);

return ide_started;
@@ -502,8 +500,10 @@ ide_startstop_t pre_task_out_intr (ide_d

if (ide_wait_stat(&startstop, drive, DATA_READY,
drive->bad_wstat, WAIT_DRQ)) {
- printk(KERN_ERR "%s: no DRQ after issuing WRITE%s\n",
- drive->name, drive->addressing ? "_EXT" : "");
+ printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
+ drive->name,
+ drive->hwif->data_phase ? "MULT" : "",
+ drive->addressing ? "_EXT" : "");
return startstop;
}

@@ -511,62 +511,12 @@ ide_startstop_t pre_task_out_intr (ide_d
local_irq_disable();

ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
- task_sectors(drive, rq, 1, IDE_PIO_OUT);
+ ide_pio_datablock(drive, rq, 1);

return ide_started;
}
EXPORT_SYMBOL(pre_task_out_intr);

-/*
- * Handler for command with PIO data-out phase (Write Multiple).
- */
-ide_startstop_t task_mulout_intr (ide_drive_t *drive)
-{
- struct request *rq = HWGROUP(drive)->rq;
- u8 stat;
-
- stat = HWIF(drive)->INB(IDE_STATUS_REG);
- if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
- return task_error(drive, rq, __FUNCTION__, stat, drive->mult_count);
-
- /* Deal with unexpected ATA data phase. */
- if (((stat & DRQ_STAT) == 0) ^ !rq->nr_sectors)
- return task_error(drive, rq, __FUNCTION__, stat, drive->mult_count);
-
- if (!rq->nr_sectors) {
- task_end_request(drive, rq, stat);
- return ide_stopped;
- }
-
- /* Still data left to transfer. */
- task_multi_sectors(drive, rq, IDE_PIO_OUT);
- ide_set_handler(drive, &task_mulout_intr, WAIT_WORSTCASE, NULL);
-
- return ide_started;
-}
-EXPORT_SYMBOL(task_mulout_intr);
-
-ide_startstop_t pre_task_mulout_intr (ide_drive_t *drive, struct request *rq)
-{
- ide_startstop_t startstop;
-
- if (ide_wait_stat(&startstop, drive, DATA_READY,
- drive->bad_wstat, WAIT_DRQ)) {
- printk(KERN_ERR "%s: no DRQ after issuing MULTWRITE%s\n",
- drive->name, drive->addressing ? "_EXT" : "");
- return startstop;
- }
-
- if (!drive->unmask)
- local_irq_disable();
-
- ide_set_handler(drive, &task_mulout_intr, WAIT_WORSTCASE, NULL);
- task_multi_sectors(drive, rq, IDE_PIO_OUT);
-
- return ide_started;
-}
-EXPORT_SYMBOL(pre_task_mulout_intr);
-
int ide_diag_taskfile (ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
{
struct request rq;
@@ -711,10 +661,7 @@ int ide_taskfile_ioctl (ide_drive_t *dri
err = -EPERM;
goto abort;
}
- args.prehandler = &pre_task_mulout_intr;
- args.handler = &task_mulout_intr;
- err = ide_diag_taskfile(drive, &args, taskout, outbuf);
- break;
+ /* fall through */
case TASKFILE_OUT:
args.prehandler = &pre_task_out_intr;
args.handler = &task_out_intr;
@@ -729,9 +676,7 @@ int ide_taskfile_ioctl (ide_drive_t *dri
err = -EPERM;
goto abort;
}
- args.handler = &task_mulin_intr;
- err = ide_diag_taskfile(drive, &args, taskin, inbuf);
- break;
+ /* fall through */
case TASKFILE_IN:
args.handler = &task_in_intr;
err = ide_diag_taskfile(drive, &args, taskin, inbuf);
diff -puN include/linux/ide.h~ide_tf_multi_pio include/linux/ide.h
--- linux-2.6.9-rc1-bk10/include/linux/ide.h~ide_tf_multi_pio 2004-09-05 19:47:57.981443280 +0200
+++ linux-2.6.9-rc1-bk10-bzolnier/include/linux/ide.h 2004-09-05 19:47:58.004439784 +0200
@@ -1455,11 +1455,8 @@ extern ide_startstop_t set_geometry_intr
extern ide_startstop_t recal_intr(ide_drive_t *);
extern ide_startstop_t task_no_data_intr(ide_drive_t *);
extern ide_startstop_t task_in_intr(ide_drive_t *);
-extern ide_startstop_t task_mulin_intr(ide_drive_t *);
extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
extern ide_startstop_t task_out_intr(ide_drive_t *);
-extern ide_startstop_t pre_task_mulout_intr(ide_drive_t *, struct request *);
-extern ide_startstop_t task_mulout_intr(ide_drive_t *);

extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);

_
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