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authorMikael Pettersson <mikpe@it.uu.se>2007-01-13 21:32:30 +0100
committerJeff Garzik <jeff@garzik.org>2007-02-09 17:39:34 -0500
commitfba6edbd3bbd5e6c10b8247d3c3794e718bbc811 (patch)
tree4b6fed09aea236aed161c29d8536ce2300294a79 /drivers/ata
parent4113bb6b67ced963b3269a72f335dd278543b56d (diff)
sata_promise: handle ATAPI_NODATA ourselves
This patch extends sata_promise to handle ATAPI_NODATA commands internally. However, commands destined to ATA_DFLAG_CDB_INTR devices are excluded from this and continue to be returned to libata. Concrete changes: - pdc_atapi_dma_pkt() is renamed to pdc_atapi_pkt(), and is extended to set up correct headers for NODATA packets - pdc_qc_prep() calls pdc_atapi_pkt() for ATAPI_NODATA - pdc_host_intr() handles ATAPI_NODATA - pdc_qc_issue_prot() sends ATAPI_NODATA packets via the chip's packet mechanism, except for CDB_INTR devices Tested on first- and second-generation chips, SATAPI and PATAPI, with no observable regressions. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/sata_promise.c30
1 files changed, 23 insertions, 7 deletions
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 9d73cb9de42..551644a9486 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -448,7 +448,7 @@ static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
}
-static void pdc_atapi_dma_pkt(struct ata_queued_cmd *qc)
+static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
dma_addr_t sg_table = ap->prd_dma;
@@ -462,10 +462,20 @@ static void pdc_atapi_dma_pkt(struct ata_queued_cmd *qc)
/* set control bits (byte 0), zero delay seq id (byte 3),
* and seq id (byte 2)
*/
- if (!(qc->tf.flags & ATA_TFLAG_WRITE))
- buf32[0] = cpu_to_le32(PDC_PKT_READ);
- else
- buf32[0] = 0;
+ switch (qc->tf.protocol) {
+ case ATA_PROT_ATAPI_DMA:
+ if (!(qc->tf.flags & ATA_TFLAG_WRITE))
+ buf32[0] = cpu_to_le32(PDC_PKT_READ);
+ else
+ buf32[0] = 0;
+ break;
+ case ATA_PROT_ATAPI_NODATA:
+ buf32[0] = cpu_to_le32(PDC_PKT_NODATA);
+ break;
+ default:
+ BUG();
+ break;
+ }
buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */
buf32[2] = 0; /* no next-packet */
@@ -549,13 +559,14 @@ static void pdc_qc_prep(struct ata_queued_cmd *qc)
break;
case ATA_PROT_ATAPI:
- case ATA_PROT_ATAPI_NODATA:
ata_qc_prep(qc);
break;
case ATA_PROT_ATAPI_DMA:
ata_qc_prep(qc);
- pdc_atapi_dma_pkt(qc);
+ /*FALLTHROUGH*/
+ case ATA_PROT_ATAPI_NODATA:
+ pdc_atapi_pkt(qc);
break;
default:
@@ -672,6 +683,7 @@ static inline unsigned int pdc_host_intr( struct ata_port *ap,
case ATA_PROT_DMA:
case ATA_PROT_NODATA:
case ATA_PROT_ATAPI_DMA:
+ case ATA_PROT_ATAPI_NODATA:
qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
ata_qc_complete(qc);
handled = 1;
@@ -771,6 +783,10 @@ static inline void pdc_packet_start(struct ata_queued_cmd *qc)
static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc)
{
switch (qc->tf.protocol) {
+ case ATA_PROT_ATAPI_NODATA:
+ if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
+ break;
+ /*FALLTHROUGH*/
case ATA_PROT_ATAPI_DMA:
case ATA_PROT_DMA:
case ATA_PROT_NODATA: