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authorRalph Campbell <ralph.campbell@qlogic.com>2007-09-07 16:54:01 -0700
committerRoland Dreier <rolandd@cisco.com>2007-10-09 20:52:23 -0700
commit6cff2faaf135b602c914710f3414630c3fc1ee83 (patch)
treea63266c7640b5739a6ab948194da0c7283229f96 /drivers/infiniband/hw/ipath/ipath_verbs.h
parentd42b01b584b6f55f70c56f6a3dabc26f4982d30d (diff)
downloadop-kernel-dev-6cff2faaf135b602c914710f3414630c3fc1ee83.zip
op-kernel-dev-6cff2faaf135b602c914710f3414630c3fc1ee83.tar.gz
IB/ipath: Optimize completion queue entry insertion and polling
The code to add an entry to the completion queue stored the QPN which is needed for the user level verbs view of the completion queue entry but the kernel struct ib_wc contains a pointer to the QP instead of a QPN. When the kernel polled for a completion queue entry, the QPN was lookup up and the QP pointer recovered. This patch stores the CQE differently based on whether the CQ is a kernel CQ or a user CQ thus avoiding the QPN to QP lookup overhead. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_verbs.h')
-rw-r--r--drivers/infiniband/hw/ipath/ipath_verbs.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.h b/drivers/infiniband/hw/ipath/ipath_verbs.h
index a197229..9be9bf9 100644
--- a/drivers/infiniband/hw/ipath/ipath_verbs.h
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.h
@@ -191,7 +191,11 @@ struct ipath_mmap_info {
struct ipath_cq_wc {
u32 head; /* index of next entry to fill */
u32 tail; /* index of next ib_poll_cq() entry */
- struct ib_uverbs_wc queue[1]; /* this is actually size ibcq.cqe + 1 */
+ union {
+ /* these are actually size ibcq.cqe + 1 */
+ struct ib_uverbs_wc uqueue[0];
+ struct ib_wc kqueue[0];
+ };
};
/*
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