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Commit 1dce589c authored by Albert Lee's avatar Albert Lee Committed by Jeff Garzik
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libata passthru: support PIO multi commands 



  support the pass through of PIO multi commands.

Signed-off-by: default avatarAlbert Lee <albertcc@tw.ibm.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent f93f1078

drivers/ata/libata-scsi.c

+16 −4
Original line number Diff line number Diff line
@@ -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) {

include/linux/ata.h

+1 −1
Original line number Diff line number Diff line
@@ -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*/