[SCSI] ipr: Faster sg list fetch
Improve overall command performance by embedding the scatterlist
in the command block used by the adapter. This decreases
the overall number of DMAs required for a single command.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h
index 4d06888..50e14f5 100644
--- a/drivers/scsi/ipr.h
+++ b/drivers/scsi/ipr.h
@@ -422,9 +422,25 @@
u8 ctl;
}__attribute__ ((packed, aligned(4)));
+struct ipr_ioadl_desc {
+ __be32 flags_and_data_len;
+#define IPR_IOADL_FLAGS_MASK 0xff000000
+#define IPR_IOADL_GET_FLAGS(x) (be32_to_cpu(x) & IPR_IOADL_FLAGS_MASK)
+#define IPR_IOADL_DATA_LEN_MASK 0x00ffffff
+#define IPR_IOADL_GET_DATA_LEN(x) (be32_to_cpu(x) & IPR_IOADL_DATA_LEN_MASK)
+#define IPR_IOADL_FLAGS_READ 0x48000000
+#define IPR_IOADL_FLAGS_READ_LAST 0x49000000
+#define IPR_IOADL_FLAGS_WRITE 0x68000000
+#define IPR_IOADL_FLAGS_WRITE_LAST 0x69000000
+#define IPR_IOADL_FLAGS_LAST 0x01000000
+
+ __be32 address;
+}__attribute__((packed, aligned (8)));
+
struct ipr_ioarcb_add_data {
union {
struct ipr_ioarcb_ata_regs regs;
+ struct ipr_ioadl_desc ioadl[5];
__be32 add_cmd_parms[10];
}u;
}__attribute__ ((packed, aligned(4)));
@@ -456,21 +472,6 @@
struct ipr_ioarcb_add_data add_data;
}__attribute__((packed, aligned (4)));
-struct ipr_ioadl_desc {
- __be32 flags_and_data_len;
-#define IPR_IOADL_FLAGS_MASK 0xff000000
-#define IPR_IOADL_GET_FLAGS(x) (be32_to_cpu(x) & IPR_IOADL_FLAGS_MASK)
-#define IPR_IOADL_DATA_LEN_MASK 0x00ffffff
-#define IPR_IOADL_GET_DATA_LEN(x) (be32_to_cpu(x) & IPR_IOADL_DATA_LEN_MASK)
-#define IPR_IOADL_FLAGS_READ 0x48000000
-#define IPR_IOADL_FLAGS_READ_LAST 0x49000000
-#define IPR_IOADL_FLAGS_WRITE 0x68000000
-#define IPR_IOADL_FLAGS_WRITE_LAST 0x69000000
-#define IPR_IOADL_FLAGS_LAST 0x01000000
-
- __be32 address;
-}__attribute__((packed, aligned (8)));
-
struct ipr_ioasa_vset {
__be32 failing_lba_hi;
__be32 failing_lba_lo;