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@xxxxxxxxx>
---
include/linux/libata.h | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 62d09c8..72df408 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
@@ -345,6 +346,12 @@ 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 {
@@ -1407,6 +1414,27 @@ 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))
--
1.5.2.4
-
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