cciss: Add enhanced scatter-gather support.
cciss: Add enhanced scatter-gather support. For controllers which
supported, more than 512 scatter-gather elements per command may
be used, and the max transfer size can be increased to 8192 blocks.
Signed-off-by: Don Brace <brace@beardog.cce.hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/block/cciss_cmd.h b/drivers/block/cciss_cmd.h
index dbaed1e..b50a9b2 100644
--- a/drivers/block/cciss_cmd.h
+++ b/drivers/block/cciss_cmd.h
@@ -7,7 +7,8 @@
//general boundary defintions
#define SENSEINFOBYTES 32//note that this value may vary between host implementations
-#define MAXSGENTRIES 31
+#define MAXSGENTRIES 32
+#define CCISS_SG_CHAIN 0x80000000
#define MAXREPLYQS 256
//Command Status value
@@ -319,6 +320,10 @@
BYTE ServerName[16];
DWORD HeartBeat;
DWORD SCSI_Prefetch;
+ DWORD MaxSGElements;
+ DWORD MaxLogicalUnits;
+ DWORD MaxPhysicalDrives;
+ DWORD MaxPhysicalDrivesPerLogicalUnit;
} CfgTable_struct;
#pragma pack()
#endif // CCISS_CMD_H