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libata passthru: support PIO multi commands

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support the pass through of PIO multi commands.

Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Albert Lee 2007-06-07 15:49:22 +08:00 committed by Jeff Garzik
parent f93f1078d0
commit 1dce589c38
2 changed files with 17 additions and 5 deletions
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20
drivers/ata/libata-scsi.c
View file

@ -2551,10 +2551,6 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
goto invalid_fld;
if (cdb[1] & 0xe0)
/* PIO multi not supported yet */
goto invalid_fld;
/*
* 12 and 16 byte CDBs use different offsets to
* provide the various register values.
@ -2606,6 +2602,22 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
tf->device = qc->dev->devno ?
tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
/* sanity check for pio multi commands */
if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
goto invalid_fld;
if (is_multi_taskfile(tf)) {
unsigned int multi_count = 1 << (cdb[1] >> 5);
/* compare the passed through multi_count
* with the cached multi_count of libata
*/
if (multi_count != dev->multi_count)
ata_dev_printk(dev, KERN_WARNING,
"invalid multi_count %u ignored\n",
multi_count);
}
/* READ/WRITE LONG use a non-standard sect_size */
qc->sect_size = ATA_SECT_SIZE;
switch (tf->command) {

2
include/linux/ata.h
View file

@ -249,7 +249,7 @@ enum ata_tf_protocols {
/* ATA taskfile protocols */
ATA_PROT_UNKNOWN, /* unknown/invalid */
ATA_PROT_NODATA, /* no data */
ATA_PROT_PIO, /* PIO single sector */
ATA_PROT_PIO, /* PIO data xfer */
ATA_PROT_DMA, /* DMA */
ATA_PROT_NCQ, /* NCQ */
ATA_PROT_ATAPI, /* packet command, PIO data xfer*/