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authorDon Brace <brace@beardog.cce.hp.com>2009-11-12 12:50:01 -0600
committerJens Axboe <jens.axboe@oracle.com>2009-11-13 08:45:54 +0100
commit5c07a311a80adb0138fc08e8279c60255d88d0b8 (patch)
tree1746b4ec4b7ea1f2f02b34d5c0adc86dc8e0d97f /drivers/block/cciss_cmd.h
parentda0021841c3ea6a82588efae3260015847ea5d33 (diff)
downloadop-kernel-dev-5c07a311a80adb0138fc08e8279c60255d88d0b8.zip
op-kernel-dev-5c07a311a80adb0138fc08e8279c60255d88d0b8.tar.gz
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>
Diffstat (limited to 'drivers/block/cciss_cmd.h')
-rw-r--r--drivers/block/cciss_cmd.h7
1 files changed, 6 insertions, 1 deletions
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 @@ typedef struct _CfgTable_struct {
BYTE ServerName[16];
DWORD HeartBeat;
DWORD SCSI_Prefetch;
+ DWORD MaxSGElements;
+ DWORD MaxLogicalUnits;
+ DWORD MaxPhysicalDrives;
+ DWORD MaxPhysicalDrivesPerLogicalUnit;
} CfgTable_struct;
#pragma pack()
#endif // CCISS_CMD_H
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