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ide-scsi: merge idescsi_input_buffers() and idescsi_output_buffers() 

* Merge idescsi_input_buffers() and idescsi_output_buffers()
  into ide_scsi_io_buffers() helper.

While at it:

* Log device name instead of driver name on error.

* Use xfer_func_t.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-07-15 21:21:52 +02:00
parent 6c60bd8ea7
commit 3e52fb4d1f
1 changed files with 25 additions and 58 deletions
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83
drivers/scsi/ide-scsi.c
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@ -129,14 +129,15 @@ static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive)
#define IDESCSI_PC_RQ 90
/*
* PIO data transfer routines using the scatter gather table.
* PIO data transfer routine using the scatter gather table.
*/
static void idescsi_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
unsigned int bcount)
static void ide_scsi_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
unsigned int bcount, int write)
{
ide_hwif_t *hwif = drive->hwif;
int count;
xfer_func_t *xf = write ? hwif->output_data : hwif->input_data;
char *buf;
int count;
while (bcount) {
count = min(pc->sg->length - pc->b_count, bcount);
@ -145,13 +146,13 @@ static void idescsi_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
local_irq_save(flags);
buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) +
pc->sg->offset;
hwif->input_data(drive, NULL, buf + pc->b_count, count);
pc->sg->offset;
xf(drive, NULL, buf + pc->b_count, count);
kunmap_atomic(buf - pc->sg->offset, KM_IRQ0);
local_irq_restore(flags);
} else {
buf = sg_virt(pc->sg);
hwif->input_data(drive, NULL, buf + pc->b_count, count);
xf(drive, NULL, buf + pc->b_count, count);
}
bcount -= count; pc->b_count += count;
if (pc->b_count == pc->sg->length) {
@ -163,45 +164,10 @@ static void idescsi_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
}
if (bcount) {
printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n");
ide_pad_transfer(drive, 0, bcount);
}
}
static void idescsi_output_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
unsigned int bcount)
{
ide_hwif_t *hwif = drive->hwif;
int count;
char *buf;
while (bcount) {
count = min(pc->sg->length - pc->b_count, bcount);
if (PageHighMem(sg_page(pc->sg))) {
unsigned long flags;
local_irq_save(flags);
buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) +
pc->sg->offset;
hwif->output_data(drive, NULL, buf + pc->b_count, count);
kunmap_atomic(buf - pc->sg->offset, KM_IRQ0);
local_irq_restore(flags);
} else {
buf = sg_virt(pc->sg);
hwif->output_data(drive, NULL, buf + pc->b_count, count);
}
bcount -= count; pc->b_count += count;
if (pc->b_count == pc->sg->length) {
if (!--pc->sg_cnt)
break;
pc->sg = sg_next(pc->sg);
pc->b_count = 0;
}
}
if (bcount) {
printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n");
ide_pad_transfer(drive, 1, bcount);
printk(KERN_ERR "%s: scatter gather table too small, %s\n",
drive->name, write ? "padding with zeros"
: "discarding data");
ide_pad_transfer(drive, write, bcount);
}
}
@ -370,6 +336,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
ide_hwif_t *hwif = drive->hwif;
struct ide_atapi_pc *pc = scsi->pc;
struct request *rq = pc->rq;
xfer_func_t *xferfunc;
unsigned int temp;
u16 bcount;
u8 stat, ireason;
@ -445,8 +412,8 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
temp = pc->buf_size - pc->xferred;
if (temp) {
if (pc->sg)
idescsi_input_buffers(drive, pc,
temp);
ide_scsi_io_buffers(drive, pc,
temp, 0);
else
hwif->input_data(drive, NULL,
pc->cur_pos, temp);
@ -464,16 +431,16 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
printk (KERN_NOTICE "ide-scsi: The scsi wants to send us more data than expected - allowing transfer\n");
#endif /* IDESCSI_DEBUG_LOG */
}
if (pc->sg)
idescsi_input_buffers(drive, pc, bcount);
else
hwif->input_data(drive, NULL, pc->cur_pos, bcount);
} else {
if (pc->sg)
idescsi_output_buffers(drive, pc, bcount);
else
hwif->output_data(drive, NULL, pc->cur_pos, bcount);
}
xferfunc = hwif->input_data;
} else
xferfunc = hwif->output_data;
if (pc->sg)
ide_scsi_io_buffers(drive, pc, bcount,
!!(pc->flags & PC_FLAG_WRITING));
else
xferfunc(drive, NULL, pc->cur_pos, bcount);
/* Update the current position */
pc->xferred += bcount;
pc->cur_pos += bcount;