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path: root/drivers/ide/ide-taskfile.c
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Diffstat (limited to 'drivers/ide/ide-taskfile.c')
-rw-r--r--drivers/ide/ide-taskfile.c96
1 files changed, 50 insertions, 46 deletions
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 84532be97c0..243421ce40d 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -80,8 +80,14 @@ ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
ide_tf_dump(drive->name, tf);
- tp_ops->set_irq(hwif, 1);
+ tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
SELECT_MASK(drive, 0);
+
+ if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
+ u8 data[2] = { tf->data, tf->hob_data };
+
+ tp_ops->output_data(drive, cmd, data, 2);
+ }
tp_ops->tf_load(drive, cmd);
}
@@ -100,9 +106,7 @@ ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
return ide_started;
case ATA_PROT_DMA:
- if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
- ide_build_sglist(drive, cmd) == 0 ||
- dma_ops->dma_setup(drive, cmd))
+ if (ide_dma_prepare(drive, cmd))
return ide_stopped;
hwif->expiry = dma_ops->dma_timer_expiry;
ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
@@ -188,70 +192,68 @@ static u8 wait_drive_not_busy(ide_drive_t *drive)
return stat;
}
-static void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
- unsigned int write, unsigned int nr_bytes)
+void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
+ unsigned int write, unsigned int len)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
struct scatterlist *cursg = cmd->cursg;
struct page *page;
-#ifdef CONFIG_HIGHMEM
unsigned long flags;
-#endif
unsigned int offset;
u8 *buf;
cursg = cmd->cursg;
- if (!cursg) {
- cursg = sg;
- cmd->cursg = sg;
- }
+ if (cursg == NULL)
+ cursg = cmd->cursg = sg;
- page = sg_page(cursg);
- offset = cursg->offset + cmd->cursg_ofs;
+ while (len) {
+ unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
- /* get the current page and offset */
- page = nth_page(page, (offset >> PAGE_SHIFT));
- offset %= PAGE_SIZE;
+ if (nr_bytes > PAGE_SIZE)
+ nr_bytes = PAGE_SIZE;
-#ifdef CONFIG_HIGHMEM
- local_irq_save(flags);
-#endif
- buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
+ page = sg_page(cursg);
+ offset = cursg->offset + cmd->cursg_ofs;
- cmd->nleft -= nr_bytes;
- cmd->cursg_ofs += nr_bytes;
+ /* get the current page and offset */
+ page = nth_page(page, (offset >> PAGE_SHIFT));
+ offset %= PAGE_SIZE;
- if (cmd->cursg_ofs == cursg->length) {
- cmd->cursg = sg_next(cmd->cursg);
- cmd->cursg_ofs = 0;
- }
+ if (PageHighMem(page))
+ local_irq_save(flags);
- /* do the actual data transfer */
- if (write)
- hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
- else
- hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
+ buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
- kunmap_atomic(buf, KM_BIO_SRC_IRQ);
-#ifdef CONFIG_HIGHMEM
- local_irq_restore(flags);
-#endif
-}
+ cmd->nleft -= nr_bytes;
+ cmd->cursg_ofs += nr_bytes;
-static void ide_pio_multi(ide_drive_t *drive, struct ide_cmd *cmd,
- unsigned int write)
-{
- unsigned int nsect;
+ if (cmd->cursg_ofs == cursg->length) {
+ cursg = cmd->cursg = sg_next(cmd->cursg);
+ cmd->cursg_ofs = 0;
+ }
+
+ /* do the actual data transfer */
+ if (write)
+ hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
+ else
+ hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
+
+ kunmap_atomic(buf, KM_BIO_SRC_IRQ);
- nsect = min_t(unsigned int, cmd->nleft >> 9, drive->mult_count);
- while (nsect--)
- ide_pio_bytes(drive, cmd, write, SECTOR_SIZE);
+ if (PageHighMem(page))
+ local_irq_restore(flags);
+
+ len -= nr_bytes;
+ }
}
+EXPORT_SYMBOL_GPL(ide_pio_bytes);
static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
unsigned int write)
{
+ unsigned int nr_bytes;
+
u8 saved_io_32bit = drive->io_32bit;
if (cmd->tf_flags & IDE_TFLAG_FS)
@@ -263,9 +265,11 @@ static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
touch_softlockup_watchdog();
if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
- ide_pio_multi(drive, cmd, write);
+ nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
else
- ide_pio_bytes(drive, cmd, write, SECTOR_SIZE);
+ nr_bytes = SECTOR_SIZE;
+
+ ide_pio_bytes(drive, cmd, write, nr_bytes);
drive->io_32bit = saved_io_32bit;
}