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| author | James Bottomley <James.Bottomley@steeleye.com> | 2006-08-30 09:45:51 -0400 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-08-31 11:18:03 -0400 |
| commit | 86e33a296c2c9ed6eece0bfff4ac776f42040504 (patch) | |
| tree | 7c4a11084b233e1899aec6c247435f3478bbd3b5 /include/scsi/scsi_host.h | |
| parent | 492dfb489658dfe4a755fa29dd0e34e9c8bd8fb8 (diff) | |
| download | linux-86e33a296c2c9ed6eece0bfff4ac776f42040504.tar.gz linux-86e33a296c2c9ed6eece0bfff4ac776f42040504.tar.xz | |
[SCSI] add shared tag map helpers
This patch adds support for sharing tag maps at the host level
(i.e. either every queue [LUN] has its own tag map or there's a single
one for the entire host). This formulation is primarily intended to
help single issue queue hardware, like the aic7xxx
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi/scsi_host.h')
| -rw-r--r-- | include/scsi/scsi_host.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index b3dd90f3e858..39c6f8cc20c3 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -16,6 +16,7 @@ struct scsi_target; struct Scsi_Host; struct scsi_host_cmd_pool; struct scsi_transport_template; +struct blk_queue_tags; /* @@ -466,6 +467,12 @@ struct Scsi_Host { struct scsi_transport_template *transportt; /* + * area to keep a shared tag map (if needed, will be + * NULL if not) + */ + struct blk_queue_tag *bqt; + + /* * The following two fields are protected with host_lock; * however, eh routines can safely access during eh processing * without acquiring the lock. |