[SCSI] hpsa: add support for 'fastpath' i/o
For certain i/o's to certain devices (unmasked physical disks) we
can bypass the RAID stack firmware and do the i/o to the device
directly and it will be faster.
Signed-off-by: Matt Gates <matthew.gates@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index 22cf799..e682d2e 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -129,6 +129,7 @@
#define CFGTBL_Trans_Simple 0x00000002l
#define CFGTBL_Trans_Performant 0x00000004l
+#define CFGTBL_Trans_io_accel1 0x00000080l
#define CFGTBL_Trans_use_short_tags 0x20000000l
#define CFGTBL_Trans_enable_directed_msix (1 << 30)
@@ -285,6 +286,7 @@
/* Command types */
#define CMD_IOCTL_PEND 0x01
#define CMD_SCSI 0x03
+#define CMD_IOACCEL1 0x04
#define DIRECT_LOOKUP_SHIFT 5
#define DIRECT_LOOKUP_BIT 0x10
@@ -335,6 +337,63 @@
u8 pad[COMMANDLIST_PAD];
};
+/* Max S/G elements in I/O accelerator command */
+#define IOACCEL1_MAXSGENTRIES 24
+
+/*
+ * Structure for I/O accelerator (mode 1) commands.
+ * Note that this structure must be 128-byte aligned in size.
+ */
+struct io_accel1_cmd {
+ u16 dev_handle; /* 0x00 - 0x01 */
+ u8 reserved1; /* 0x02 */
+ u8 function; /* 0x03 */
+ u8 reserved2[8]; /* 0x04 - 0x0B */
+ u32 err_info; /* 0x0C - 0x0F */
+ u8 reserved3[2]; /* 0x10 - 0x11 */
+ u8 err_info_len; /* 0x12 */
+ u8 reserved4; /* 0x13 */
+ u8 sgl_offset; /* 0x14 */
+ u8 reserved5[7]; /* 0x15 - 0x1B */
+ u32 transfer_len; /* 0x1C - 0x1F */
+ u8 reserved6[4]; /* 0x20 - 0x23 */
+ u16 io_flags; /* 0x24 - 0x25 */
+ u8 reserved7[14]; /* 0x26 - 0x33 */
+ u8 LUN[8]; /* 0x34 - 0x3B */
+ u32 control; /* 0x3C - 0x3F */
+ u8 CDB[16]; /* 0x40 - 0x4F */
+ u8 reserved8[16]; /* 0x50 - 0x5F */
+ u16 host_context_flags; /* 0x60 - 0x61 */
+ u16 timeout_sec; /* 0x62 - 0x63 */
+ u8 ReplyQueue; /* 0x64 */
+ u8 reserved9[3]; /* 0x65 - 0x67 */
+ struct vals32 Tag; /* 0x68 - 0x6F */
+ struct vals32 host_addr; /* 0x70 - 0x77 */
+ u8 CISS_LUN[8]; /* 0x78 - 0x7F */
+ struct SGDescriptor SG[IOACCEL1_MAXSGENTRIES];
+};
+
+#define IOACCEL1_FUNCTION_SCSIIO 0x00
+#define IOACCEL1_SGLOFFSET 32
+
+#define IOACCEL1_IOFLAGS_IO_REQ 0x4000
+#define IOACCEL1_IOFLAGS_CDBLEN_MASK 0x001F
+#define IOACCEL1_IOFLAGS_CDBLEN_MAX 16
+
+#define IOACCEL1_CONTROL_NODATAXFER 0x00000000
+#define IOACCEL1_CONTROL_DATA_OUT 0x01000000
+#define IOACCEL1_CONTROL_DATA_IN 0x02000000
+#define IOACCEL1_CONTROL_TASKPRIO_MASK 0x00007800
+#define IOACCEL1_CONTROL_TASKPRIO_SHIFT 11
+#define IOACCEL1_CONTROL_SIMPLEQUEUE 0x00000000
+#define IOACCEL1_CONTROL_HEADOFQUEUE 0x00000100
+#define IOACCEL1_CONTROL_ORDEREDQUEUE 0x00000200
+#define IOACCEL1_CONTROL_ACA 0x00000400
+
+#define IOACCEL1_HCFLAGS_CISS_FORMAT 0x0013
+
+#define IOACCEL1_BUSADDR_CMDTYPE 0x00000060
+
/* Configuration Table Structure */
struct HostWrite {
u32 TransportRequest;
@@ -346,6 +405,7 @@
#define SIMPLE_MODE 0x02
#define PERFORMANT_MODE 0x04
#define MEMQ_MODE 0x08
+#define IOACCEL_MODE_1 0x80
struct CfgTable {
u8 Signature[4];