[SCSI] hpsa: Allow multiple command completions per interrupt.
This is done by adding support for the so-called "performant mode"
(that's really what they called it). Smart Array controllers
have a mode which enables multiple command completions to be
delivered with a single interrupt, "performant" mode. We want to use
that mode, as some newer controllers will be requiring this mode.
Signed-off-by: Don Brace <brace@beardog.cce.hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Mike Miller <mikem@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index 88bb3b0..3e0abdf 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -101,6 +101,7 @@
#define CFGTBL_AccCmds 0x00000001l
#define CFGTBL_Trans_Simple 0x00000002l
+#define CFGTBL_Trans_Performant 0x00000004l
#define CFGTBL_BusType_Ultra2 0x00000001l
#define CFGTBL_BusType_Ultra3 0x00000002l
@@ -267,12 +268,31 @@
#define CMD_IOCTL_PEND 0x01
#define CMD_SCSI 0x03
-struct ctlr_info; /* defined in hpsa.h */
-/* The size of this structure needs to be divisible by 8
- * on all architectures, because the controller uses 2
- * lower bits of the address, and the driver uses 1 lower
- * bit (3 bits total.)
+/* This structure needs to be divisible by 32 for new
+ * indexing method and performant mode.
*/
+#define PAD32 32
+#define PAD64DIFF 0
+#define USEEXTRA ((sizeof(void *) - 4)/4)
+#define PADSIZE (PAD32 + PAD64DIFF * USEEXTRA)
+
+#define DIRECT_LOOKUP_SHIFT 5
+#define DIRECT_LOOKUP_BIT 0x10
+
+#define HPSA_ERROR_BIT 0x02
+struct ctlr_info; /* defined in hpsa.h */
+/* The size of this structure needs to be divisible by 32
+ * on all architectures because low 5 bits of the addresses
+ * are used as follows:
+ *
+ * bit 0: to device, used to indicate "performant mode" command
+ * from device, indidcates error status.
+ * bit 1-3: to device, indicates block fetch table entry for
+ * reducing DMA in fetching commands from host memory.
+ * bit 4: used to indicate whether tag is "direct lookup" (index),
+ * or a bus address.
+ */
+
struct CommandList {
struct CommandListHeader Header;
struct RequestBlock Request;
@@ -291,6 +311,14 @@
struct completion *waiting;
int retry_count;
void *scsi_cmd;
+
+/* on 64 bit architectures, to get this to be 32-byte-aligned
+ * it so happens we need no padding, on 32 bit systems,
+ * we need 8 bytes of padding. This does that.
+ */
+#define COMMANDLIST_PAD ((8 - sizeof(long))/4 * 8)
+ u8 pad[COMMANDLIST_PAD];
+
};
/* Configuration Table Structure */
@@ -301,18 +329,38 @@
u32 CoalIntCount;
};
+#define SIMPLE_MODE 0x02
+#define PERFORMANT_MODE 0x04
+#define MEMQ_MODE 0x08
+
struct CfgTable {
- u8 Signature[4];
- u32 SpecValence;
- u32 TransportSupport;
- u32 TransportActive;
- struct HostWrite HostWrite;
- u32 CmdsOutMax;
- u32 BusTypes;
- u32 Reserved;
- u8 ServerName[16];
- u32 HeartBeat;
- u32 SCSI_Prefetch;
+ u8 Signature[4];
+ u32 SpecValence;
+ u32 TransportSupport;
+ u32 TransportActive;
+ struct HostWrite HostWrite;
+ u32 CmdsOutMax;
+ u32 BusTypes;
+ u32 TransMethodOffset;
+ u8 ServerName[16];
+ u32 HeartBeat;
+ u32 SCSI_Prefetch;
+ u32 MaxScatterGatherElements;
+ u32 MaxLogicalUnits;
+ u32 MaxPhysicalDevices;
+ u32 MaxPhysicalDrivesPerLogicalUnit;
+ u32 MaxPerformantModeCommands;
+};
+
+#define NUM_BLOCKFETCH_ENTRIES 8
+struct TransTable_struct {
+ u32 BlockFetch[NUM_BLOCKFETCH_ENTRIES];
+ u32 RepQSize;
+ u32 RepQCount;
+ u32 RepQCtrAddrLow32;
+ u32 RepQCtrAddrHigh32;
+ u32 RepQAddr0Low32;
+ u32 RepQAddr0High32;
};
struct hpsa_pci_info {
