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authorTejun Heo <htejun@gmail.com>2007-12-05 10:43:06 +0300
committerJeff Garzik <jeff@garzik.org>2008-01-23 13:24:14 +0300
commitceb0c642624f634c5b4f46b0e22df19be87a2e53 (patch)
treea55adf01b6c00b4724a468a52fce03704bf5109f
parent0dc36888d4422140f9eaf50f24953ec109f750a3 (diff)
downloadlinux-ceb0c642624f634c5b4f46b0e22df19be87a2e53.tar.xz
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: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
-rw-r--r--include/linux/libata.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index cc4eaef6f889..03afcd63202d 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -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))