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ide-disk: use do_rw_taskfile() (take 2) 

* Add IDE_TFLAG_DMA_PIO_FALLBACK taskfile flag to indicate the need
  to skip loading taskfile registers in do_rw_taskfile().

* Export do_rw_taskfile().

* Convert __ide_do_rw_disk() to use do_rw_taskfile().

* Unexport ide_tf_load().

* Unexport {pre_task_out,task_in}_intr() and make it static.

* Remove incorrect comment about do_rw_taskfile() from <linux/ide.h>.

There should be no functionality changes caused by this patch.

v2:
* Add missing blk_fs_request() check to task_dma_ok() (for VDMA).

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-01-25 22:17:16 +01:00
parent ba76ae3883
commit f6e29e35cc
3 changed files with 20 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/ide/ide-disk.c
View File

@ -185,6 +185,7 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
u8 lba48 = (drive->addressing == 1) ? 1 : 0;
ide_task_t task;
struct ide_taskfile *tf = &task.tf;
ide_startstop_t rc;
if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
if (block + rq->nr_sectors > 1ULL << 28)
@ -252,32 +253,22 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
task.tf_flags |= IDE_TFLAG_WRITE;
ide_tf_set_cmd(drive, &task, dma);
if (!dma)
hwif->data_phase = task.data_phase;
task.rq = rq;
ide_tf_load(drive, &task);
rc = do_rw_taskfile(drive, &task);
if (dma) {
if (!hwif->dma_setup(drive)) {
hwif->dma_exec_cmd(drive, tf->command);
hwif->dma_start(drive);
return ide_started;
}
if (rc == ide_stopped && dma) {
/* fallback to PIO */
task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
ide_tf_set_cmd(drive, &task, 0);
hwif->data_phase = task.data_phase;
ide_init_sg_cmd(drive, rq);
rc = do_rw_taskfile(drive, &task);
}
hwif->data_phase = task.data_phase;
if (rq_data_dir(rq) == READ) {
ide_execute_command(drive, tf->command, &task_in_intr,
WAIT_WORSTCASE, NULL);
return ide_started;
} else {
hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
ndelay(400); /* FIXME */
return pre_task_out_intr(drive, rq);
}
return rc;
}
/*

16
drivers/ide/ide-taskfile.c
View File

@ -114,8 +114,6 @@ void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
}
EXPORT_SYMBOL_GPL(ide_tf_load);
int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
{
ide_task_t args;
@ -133,7 +131,7 @@ int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
static int inline task_dma_ok(ide_task_t *task)
{
if (task->tf_flags & IDE_TFLAG_FLAGGED)
if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
return 1;
switch (task->tf.command) {
@ -154,6 +152,8 @@ static ide_startstop_t task_no_data_intr(ide_drive_t *);
static ide_startstop_t set_geometry_intr(ide_drive_t *);
static ide_startstop_t recal_intr(ide_drive_t *);
static ide_startstop_t set_multmode_intr(ide_drive_t *);
static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
static ide_startstop_t task_in_intr(ide_drive_t *);
ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
{
@ -173,7 +173,8 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
if (task->tf_flags & IDE_TFLAG_FLAGGED)
task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
ide_tf_load(drive, task);
if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
ide_tf_load(drive, task);
switch (task->data_phase) {
case TASKFILE_MULTI_OUT:
@ -208,6 +209,7 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
return ide_started;
}
}
EXPORT_SYMBOL_GPL(do_rw_taskfile);
/*
* set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
@ -446,7 +448,7 @@ static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
/*
* Handler for command with PIO data-in phase (Read/Read Multiple).
*/
ide_startstop_t task_in_intr (ide_drive_t *drive)
static ide_startstop_t task_in_intr(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
struct request *rq = HWGROUP(drive)->rq;
@ -477,7 +479,6 @@ ide_startstop_t task_in_intr (ide_drive_t *drive)
return ide_started;
}
EXPORT_SYMBOL(task_in_intr);
/*
* Handler for command with PIO data-out phase (Write/Write Multiple).
@ -507,7 +508,7 @@ static ide_startstop_t task_out_intr (ide_drive_t *drive)
return ide_started;
}
ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
{
ide_startstop_t startstop;
@ -528,7 +529,6 @@ ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
return ide_started;
}
EXPORT_SYMBOL(pre_task_out_intr);
int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
{

9
include/linux/ide.h
View File

@ -912,6 +912,7 @@ enum {
IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16),
IDE_TFLAG_IN_DATA = (1 << 17),
IDE_TFLAG_CUSTOM_HANDLER = (1 << 18),
IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19),
};
struct ide_taskfile {
@ -965,13 +966,7 @@ extern int drive_is_ready(ide_drive_t *);
void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
/*
* taskfile io for disks for now...and builds request from ide_ioctl
*/
extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
extern ide_startstop_t task_in_intr(ide_drive_t *);
extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);