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Commit ceb0c642 authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
Browse files

libata: add ATAPI_* cmd types and implement atapi_cmd_type() 



Add ATAPI command types - ATAPI_READ, WRITE, RW_BUF, READ_CD and MISC,
and implement atapi_cmd_type() which takes SCSI opcode and returns to
which class the opcode belongs.  This will be used later to improve
ATAPI handling.

Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 0dc36888

include/linux/libata.h

+28 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ 
#include <linux/workqueue.h>

#include <scsi/scsi_host.h>

#include <linux/acpi.h>

#include <linux/cdrom.h>



/*

 * Define if arch has non-standard setup.  This is a _PCI_ standard
@@ -346,6 +347,12 @@ enum { 
	ATA_DMA_MASK_ATA	= (1 << 0),	/* DMA on ATA Disk */

	ATA_DMA_MASK_ATAPI	= (1 << 1),	/* DMA on ATAPI */

	ATA_DMA_MASK_CFA	= (1 << 2),	/* DMA on CF Card */



	/* ATAPI command types */

	ATAPI_READ		= 0,		/* READs */

	ATAPI_WRITE		= 1,		/* WRITEs */

	ATAPI_READ_CD		= 2,		/* READ CD [MSF] */

	ATAPI_MISC		= 3,		/* the rest */

};



enum ata_xfer_mask {
@@ -1408,6 +1415,27 @@ static inline int ata_try_flush_cache(const struct ata_device *dev) 
	       ata_id_has_flush_ext(dev->id);

}



static inline int atapi_cmd_type(u8 opcode)

{

	switch (opcode) {

	case GPCMD_READ_10:

	case GPCMD_READ_12:

		return ATAPI_READ;



	case GPCMD_WRITE_10:

	case GPCMD_WRITE_12:

	case GPCMD_WRITE_AND_VERIFY_10:

		return ATAPI_WRITE;



	case GPCMD_READ_CD:

	case GPCMD_READ_CD_MSF:

		return ATAPI_READ_CD;



	default:

		return ATAPI_MISC;

	}

}



static inline unsigned int ac_err_mask(u8 status)

{

	if (status & (ATA_BUSY | ATA_DRQ))