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path: root/drivers/ide/ide-dma-sff.c
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Diffstat (limited to 'drivers/ide/ide-dma-sff.c')
-rw-r--r--drivers/ide/ide-dma-sff.c52
1 files changed, 16 insertions, 36 deletions
diff --git a/drivers/ide/ide-dma-sff.c b/drivers/ide/ide-dma-sff.c
index 123d393658a..16fc46edc32 100644
--- a/drivers/ide/ide-dma-sff.c
+++ b/drivers/ide/ide-dma-sff.c
@@ -38,10 +38,9 @@ int config_drive_for_dma(ide_drive_t *drive)
* Enable DMA on any drive that has mode2 DMA
* (multi or single) enabled
*/
- if (id[ATA_ID_FIELD_VALID] & 2) /* regular DMA */
- if ((id[ATA_ID_MWDMA_MODES] & 0x404) == 0x404 ||
- (id[ATA_ID_SWDMA_MODES] & 0x404) == 0x404)
- return 1;
+ if ((id[ATA_ID_MWDMA_MODES] & 0x404) == 0x404 ||
+ (id[ATA_ID_SWDMA_MODES] & 0x404) == 0x404)
+ return 1;
/* Consult the list of known "good" drives */
if (ide_dma_good_drive(drive))
@@ -111,7 +110,7 @@ EXPORT_SYMBOL_GPL(ide_dma_host_set);
* May also be invoked from trm290.c
*/
-int ide_build_dmatable(ide_drive_t *drive, struct request *rq)
+int ide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
__le32 *table = (__le32 *)hwif->dmatable_cpu;
@@ -120,11 +119,7 @@ int ide_build_dmatable(ide_drive_t *drive, struct request *rq)
struct scatterlist *sg;
u8 is_trm290 = !!(hwif->host_flags & IDE_HFLAG_TRM290);
- hwif->sg_nents = ide_build_sglist(drive, rq);
- if (hwif->sg_nents == 0)
- return 0;
-
- for_each_sg(hwif->sg_table, sg, hwif->sg_nents, i) {
+ for_each_sg(hwif->sg_table, sg, cmd->sg_nents, i) {
u32 cur_addr, cur_len, xcount, bcount;
cur_addr = sg_dma_address(sg);
@@ -170,8 +165,6 @@ use_pio_instead:
printk(KERN_ERR "%s: %s\n", drive->name,
count ? "DMA table too small" : "empty DMA table?");
- ide_destroy_dmatable(drive);
-
return 0; /* revert to PIO for this request */
}
EXPORT_SYMBOL_GPL(ide_build_dmatable);
@@ -179,6 +172,7 @@ EXPORT_SYMBOL_GPL(ide_build_dmatable);
/**
* ide_dma_setup - begin a DMA phase
* @drive: target device
+ * @cmd: command
*
* Build an IDE DMA PRD (IDE speak for scatter gather table)
* and then set up the DMA transfer registers for a device
@@ -189,17 +183,16 @@ EXPORT_SYMBOL_GPL(ide_build_dmatable);
* is returned.
*/
-int ide_dma_setup(ide_drive_t *drive)
+int ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = hwif->rq;
- unsigned int reading = rq_data_dir(rq) ? 0 : ATA_DMA_WR;
u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+ u8 rw = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 0 : ATA_DMA_WR;
u8 dma_stat;
/* fall back to pio! */
- if (!ide_build_dmatable(drive, rq)) {
- ide_map_sg(drive, rq);
+ if (ide_build_dmatable(drive, cmd) == 0) {
+ ide_map_sg(drive, cmd);
return 1;
}
@@ -212,9 +205,9 @@ int ide_dma_setup(ide_drive_t *drive)
/* specify r/w */
if (mmio)
- writeb(reading, (void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
+ writeb(rw, (void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
else
- outb(reading, hwif->dma_base + ATA_DMA_CMD);
+ outb(rw, hwif->dma_base + ATA_DMA_CMD);
/* read DMA status for INTR & ERROR flags */
dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
@@ -222,13 +215,12 @@ int ide_dma_setup(ide_drive_t *drive)
/* clear INTR & ERROR flags */
ide_dma_sff_write_status(hwif, dma_stat | ATA_DMA_ERR | ATA_DMA_INTR);
- drive->waiting_for_dma = 1;
return 0;
}
EXPORT_SYMBOL_GPL(ide_dma_setup);
/**
- * dma_timer_expiry - handle a DMA timeout
+ * ide_dma_sff_timer_expiry - handle a DMA timeout
* @drive: Drive that timed out
*
* An IDE DMA transfer timed out. In the event of an error we ask
@@ -241,7 +233,7 @@ EXPORT_SYMBOL_GPL(ide_dma_setup);
* This can occur if an interrupt is lost or due to hang or bugs.
*/
-static int dma_timer_expiry(ide_drive_t *drive)
+int ide_dma_sff_timer_expiry(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u8 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
@@ -265,14 +257,7 @@ static int dma_timer_expiry(ide_drive_t *drive)
return 0; /* Status is unknown -- reset the bus */
}
-
-void ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
-{
- /* issue cmd to drive */
- ide_execute_command(drive, command, &ide_dma_intr, 2 * WAIT_CMD,
- dma_timer_expiry);
-}
-EXPORT_SYMBOL_GPL(ide_dma_exec_cmd);
+EXPORT_SYMBOL_GPL(ide_dma_sff_timer_expiry);
void ide_dma_start(ide_drive_t *drive)
{
@@ -303,8 +288,6 @@ int ide_dma_end(ide_drive_t *drive)
ide_hwif_t *hwif = drive->hwif;
u8 dma_stat = 0, dma_cmd = 0, mask;
- drive->waiting_for_dma = 0;
-
/* stop DMA */
if (hwif->host_flags & IDE_HFLAG_MMIO) {
dma_cmd = readb((void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
@@ -321,8 +304,6 @@ int ide_dma_end(ide_drive_t *drive)
/* clear INTR & ERROR bits */
ide_dma_sff_write_status(hwif, dma_stat | ATA_DMA_ERR | ATA_DMA_INTR);
- /* purge DMA mappings */
- ide_destroy_dmatable(drive);
wmb();
/* verify good DMA status */
@@ -346,12 +327,11 @@ EXPORT_SYMBOL_GPL(ide_dma_test_irq);
const struct ide_dma_ops sff_dma_ops = {
.dma_host_set = ide_dma_host_set,
.dma_setup = ide_dma_setup,
- .dma_exec_cmd = ide_dma_exec_cmd,
.dma_start = ide_dma_start,
.dma_end = ide_dma_end,
.dma_test_irq = ide_dma_test_irq,
- .dma_timeout = ide_dma_timeout,
.dma_lost_irq = ide_dma_lost_irq,
+ .dma_timer_expiry = ide_dma_sff_timer_expiry,
.dma_sff_read_status = ide_dma_sff_read_status,
};
EXPORT_SYMBOL_GPL(sff_dma_ops);