*/
#include <linux/types.h>
+#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/ide.h>
#include <linux/scatterlist.h>
ide_startstop_t ide_dma_intr(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
+ struct ide_cmd *cmd = &hwif->cmd;
u8 stat = 0, dma_stat = 0;
+ drive->waiting_for_dma = 0;
dma_stat = hwif->dma_ops->dma_end(drive);
+ ide_dma_unmap_sg(drive, cmd);
stat = hwif->tp_ops->read_status(hwif);
if (OK_STAT(stat, DRIVE_READY, drive->bad_wstat | ATA_DRQ)) {
if (!dma_stat) {
- struct ide_cmd *cmd = &hwif->cmd;
-
if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
ide_finish_cmd(drive, cmd, stat);
else
ide_complete_rq(drive, 0,
- cmd->rq->nr_sectors << 9);
+ blk_rq_sectors(cmd->rq) << 9);
return ide_stopped;
}
printk(KERN_ERR "%s: %s: bad DMA status (0x%02x)\n",
}
return ide_error(drive, "dma_intr", stat);
}
-EXPORT_SYMBOL_GPL(ide_dma_intr);
int ide_dma_good_drive(ide_drive_t *drive)
{
}
/**
- * ide_build_sglist - map IDE scatter gather for DMA I/O
- * @drive: the drive to build the DMA table for
- * @rq: the request holding the sg list
+ * ide_dma_map_sg - map IDE scatter gather for DMA I/O
+ * @drive: the drive to map the DMA table for
+ * @cmd: command
*
* Perform the DMA mapping magic necessary to access the source or
* target buffers of a request via DMA. The lower layers of the
* operate in a portable fashion.
*/
-int ide_build_sglist(ide_drive_t *drive, struct request *rq)
+static int ide_dma_map_sg(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
- struct ide_cmd *cmd = &hwif->cmd;
int i;
- ide_map_sg(drive, rq);
-
- if (rq_data_dir(rq) == READ)
- cmd->sg_dma_direction = DMA_FROM_DEVICE;
- else
+ if (cmd->tf_flags & IDE_TFLAG_WRITE)
cmd->sg_dma_direction = DMA_TO_DEVICE;
+ else
+ cmd->sg_dma_direction = DMA_FROM_DEVICE;
i = dma_map_sg(hwif->dev, sg, cmd->sg_nents, cmd->sg_dma_direction);
- if (i == 0)
- ide_map_sg(drive, rq);
- else {
+ if (i) {
cmd->orig_sg_nents = cmd->sg_nents;
cmd->sg_nents = i;
}
}
/**
- * ide_destroy_dmatable - clean up DMA mapping
+ * ide_dma_unmap_sg - clean up DMA mapping
* @drive: The drive to unmap
*
* Teardown mappings after DMA has completed. This must be called
* time.
*/
-void ide_destroy_dmatable(ide_drive_t *drive)
+void ide_dma_unmap_sg(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
- struct ide_cmd *cmd = &hwif->cmd;
dma_unmap_sg(hwif->dev, hwif->sg_table, cmd->orig_sg_nents,
cmd->sg_dma_direction);
}
-EXPORT_SYMBOL_GPL(ide_destroy_dmatable);
+EXPORT_SYMBOL_GPL(ide_dma_unmap_sg);
/**
* ide_dma_off_quietly - Generic DMA kill
case XFER_UDMA_0:
if ((id[ATA_ID_FIELD_VALID] & 4) == 0)
break;
-
+ mask = id[ATA_ID_UDMA_MODES];
if (port_ops && port_ops->udma_filter)
- mask = port_ops->udma_filter(drive);
+ mask &= port_ops->udma_filter(drive);
else
- mask = hwif->ultra_mask;
- mask &= id[ATA_ID_UDMA_MODES];
+ mask &= hwif->ultra_mask;
/*
* avoid false cable warning from eighty_ninty_three()
}
break;
case XFER_MW_DMA_0:
- if ((id[ATA_ID_FIELD_VALID] & 2) == 0)
- break;
+ mask = id[ATA_ID_MWDMA_MODES];
+
+ /* Also look for the CF specific MWDMA modes... */
+ if (ata_id_is_cfa(id) && (id[ATA_ID_CFA_MODES] & 0x38)) {
+ u8 mode = ((id[ATA_ID_CFA_MODES] & 0x38) >> 3) - 1;
+
+ mask |= ((2 << mode) - 1) << 3;
+ }
+
if (port_ops && port_ops->mdma_filter)
- mask = port_ops->mdma_filter(drive);
+ mask &= port_ops->mdma_filter(drive);
else
- mask = hwif->mwdma_mask;
- mask &= id[ATA_ID_MWDMA_MODES];
+ mask &= hwif->mwdma_mask;
break;
case XFER_SW_DMA_0:
- if (id[ATA_ID_FIELD_VALID] & 2) {
- mask = id[ATA_ID_SWDMA_MODES] & hwif->swdma_mask;
- } else if (id[ATA_ID_OLD_DMA_MODES] >> 8) {
+ mask = id[ATA_ID_SWDMA_MODES];
+ if (!(mask & ATA_SWDMA2) && (id[ATA_ID_OLD_DMA_MODES] >> 8)) {
u8 mode = id[ATA_ID_OLD_DMA_MODES] >> 8;
/*
* (the maximum allowed mode is XFER_SW_DMA_2)
*/
if (mode <= 2)
- mask = ((2 << mode) - 1) & hwif->swdma_mask;
+ mask = (2 << mode) - 1;
}
+ mask &= hwif->swdma_mask;
break;
default:
BUG();
return mode;
}
-EXPORT_SYMBOL_GPL(ide_find_dma_mode);
static int ide_tune_dma(ide_drive_t *drive)
{
if (__ide_dma_bad_drive(drive))
return 0;
- if (ide_id_dma_bug(drive))
- return 0;
-
if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
return config_drive_for_dma(drive);
return -1;
}
-int ide_id_dma_bug(ide_drive_t *drive)
-{
- u16 *id = drive->id;
-
- if (id[ATA_ID_FIELD_VALID] & 4) {
- if ((id[ATA_ID_UDMA_MODES] >> 8) &&
- (id[ATA_ID_MWDMA_MODES] >> 8))
- goto err_out;
- } else if (id[ATA_ID_FIELD_VALID] & 2) {
- if ((id[ATA_ID_MWDMA_MODES] >> 8) &&
- (id[ATA_ID_SWDMA_MODES] >> 8))
- goto err_out;
- }
- return 0;
-err_out:
- printk(KERN_ERR "%s: bad DMA info in identify block\n", drive->name);
- return 1;
-}
-
int ide_set_dma(ide_drive_t *drive)
{
int rc;
}
EXPORT_SYMBOL_GPL(ide_dma_lost_irq);
-void ide_dma_timeout(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
-
- printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name);
-
- if (hwif->dma_ops->dma_test_irq(drive))
- return;
-
- ide_dump_status(drive, "DMA timeout", hwif->tp_ops->read_status(hwif));
-
- hwif->dma_ops->dma_end(drive);
-}
-EXPORT_SYMBOL_GPL(ide_dma_timeout);
-
/*
* un-busy the port etc, and clear any pending DMA status. we want to
* retry the current request in pio mode instead of risking tossing it
ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error)
{
ide_hwif_t *hwif = drive->hwif;
+ const struct ide_dma_ops *dma_ops = hwif->dma_ops;
+ struct ide_cmd *cmd = &hwif->cmd;
struct request *rq;
ide_startstop_t ret = ide_stopped;
if (error < 0) {
printk(KERN_WARNING "%s: DMA timeout error\n", drive->name);
- (void)hwif->dma_ops->dma_end(drive);
+ drive->waiting_for_dma = 0;
+ (void)dma_ops->dma_end(drive);
+ ide_dma_unmap_sg(drive, cmd);
ret = ide_error(drive, "dma timeout error",
hwif->tp_ops->read_status(hwif));
} else {
printk(KERN_WARNING "%s: DMA timeout retry\n", drive->name);
- hwif->dma_ops->dma_timeout(drive);
+ if (dma_ops->dma_clear)
+ dma_ops->dma_clear(drive);
+ printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name);
+ if (dma_ops->dma_test_irq(drive) == 0) {
+ ide_dump_status(drive, "DMA timeout",
+ hwif->tp_ops->read_status(hwif));
+ drive->waiting_for_dma = 0;
+ (void)dma_ops->dma_end(drive);
+ ide_dma_unmap_sg(drive, cmd);
+ }
}
/*
/*
* un-busy drive etc and make sure request is sane
*/
-
rq = hwif->rq;
- if (!rq)
- goto out;
-
- hwif->rq = NULL;
-
- rq->errors = 0;
-
- if (!rq->bio)
- goto out;
-
- rq->sector = rq->bio->bi_sector;
- rq->current_nr_sectors = bio_iovec(rq->bio)->bv_len >> 9;
- rq->hard_cur_sectors = rq->current_nr_sectors;
- rq->buffer = bio_data(rq->bio);
-out:
+ if (rq) {
+ hwif->rq = NULL;
+ rq->errors = 0;
+ }
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(ide_allocate_dma_engine);
+
+int ide_dma_prepare(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+ const struct ide_dma_ops *dma_ops = drive->hwif->dma_ops;
+
+ if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
+ (dma_ops->dma_check && dma_ops->dma_check(drive, cmd)))
+ goto out;
+ ide_map_sg(drive, cmd);
+ if (ide_dma_map_sg(drive, cmd) == 0)
+ goto out_map;
+ if (dma_ops->dma_setup(drive, cmd))
+ goto out_dma_unmap;
+ drive->waiting_for_dma = 1;
+ return 0;
+out_dma_unmap:
+ ide_dma_unmap_sg(drive, cmd);
+out_map:
+ ide_map_sg(drive, cmd);
+out:
+ return 1;
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff