diff options
author | Michael S. Tsirkin <mst@mellanox.co.il> | 2006-12-31 19:09:42 (GMT) |
---|---|---|
committer | Roland Dreier <rolandd@cisco.com> | 2007-02-04 22:11:55 (GMT) |
commit | 062dbb69f32b9ccea701b30f8cc0049482e6211f (patch) | |
tree | 063b57c57dfce3ff2775a64721f5fe311752247a /include | |
parent | 459d6e2a541a5226825db998e627e0aa046aa257 (diff) | |
download | linux-fsl-qoriq-062dbb69f32b9ccea701b30f8cc0049482e6211f.tar.xz |
IB: Return qp pointer as part of ib_wc
struct ib_wc currently only includes the local QP number: this matches
the IB spec, but seems mostly useless. The following patch replaces
this with the pointer to qp itself, and updates all low level drivers
and all users.
This has the following advantages:
- Ability to get a per-qp context through wc->qp->qp_context
- Existing drivers already have the qp pointer ready in poll cq, so
this change actually saves a tiny bit (extra memory read) on data path
(for ehca it would actually be expensive to find the QP pointer when
polling a CQ, but ehca does not support SRQ so we can leave wc->qp as
NULL for ehca)
- Users that need the QP number can still get it through wc->qp->qp_num
Use case:
In IPoIB connected mode code, I have a common CQ shared by multiple
QPs. To track connection usage, I need a way to get at some per-QP
context upon the completion, and I would like to avoid allocating
context object per work request just to stick a QP pointer into it.
With this code, I can just use wc->qp->qp_context.
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/rdma/ib_verbs.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 73aafd7..765589f 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -420,8 +420,8 @@ struct ib_wc { enum ib_wc_opcode opcode; u32 vendor_err; u32 byte_len; + struct ib_qp *qp; __be32 imm_data; - u32 qp_num; u32 src_qp; int wc_flags; u16 pkey_index; |