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| author | Don Brace <brace@beardog.cce.hp.com> | 2009-11-12 12:50:01 -0600 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-11-13 08:45:54 +0100 |
| commit | 5c07a311a80adb0138fc08e8279c60255d88d0b8 (patch) | |
| tree | 1746b4ec4b7ea1f2f02b34d5c0adc86dc8e0d97f /drivers/block/cciss.h | |
| parent | da0021841c3ea6a82588efae3260015847ea5d33 (diff) | |
| download | linux-5c07a311a80adb0138fc08e8279c60255d88d0b8.tar.gz linux-5c07a311a80adb0138fc08e8279c60255d88d0b8.tar.bz2 linux-5c07a311a80adb0138fc08e8279c60255d88d0b8.zip | |
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.h')
| -rw-r--r-- | drivers/block/cciss.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h index 31524cf42c77..e5c63e579ffc 100644 --- a/drivers/block/cciss.h +++ b/drivers/block/cciss.h @@ -55,7 +55,13 @@ typedef struct _drive_info_struct char device_initialized; /* indicates whether dev is initialized */ } drive_info_struct; -struct ctlr_info +struct Cmd_sg_list { + SGDescriptor_struct *sgchain; + dma64_addr_t sg_chain_dma; + int chain_block_size; +}; + +struct ctlr_info { int ctlr; char devname[8]; @@ -75,6 +81,16 @@ struct ctlr_info int num_luns; int highest_lun; int usage_count; /* number of opens all all minor devices */ + /* Need space for temp sg list + * number of scatter/gathers supported + * number of scatter/gathers in chained block + */ + struct scatterlist **scatter_list; + int maxsgentries; + int chainsize; + int max_cmd_sgentries; + struct Cmd_sg_list **cmd_sg_list; + # define DOORBELL_INT 0 # define PERF_MODE_INT 1 # define SIMPLE_MODE_INT 2 |