IB/rdmavt: Handle local operations in post send
authorJianxin Xiong <jianxin.xiong@intel.com>
Mon, 25 Jul 2016 20:38:25 +0000 (13:38 -0700)
committerDoug Ledford <dledford@redhat.com>
Tue, 2 Aug 2016 20:00:58 +0000 (16:00 -0400)
commitd9f8723924d5955979d05cb7f4f10d9ebac39b7d
treef48b2c3d7abd25c5a817fc262e9a788aeeb4eb21
parente8f8b098a44a66d3da81e460aed465f26693e120
IB/rdmavt: Handle local operations in post send

Some work requests are local operations, such as IB_WR_REG_MR and
IB_WR_LOCAL_INV. They differ from non-local operations in that:

(1) Local operations can be processed immediately without being posted
to the send queue if neither fencing nor completion generation is needed.
However, to ensure correct ordering, once a local operation is posted to
the work queue due to fencing or completion requiement, all subsequent
local operations must also be posted to the work queue until all the
local operations on the work queue have completed.

(2) Local operations don't send packets over the wire and thus don't
need (and shouldn't update) the packet sequence numbers.

Define a new a flag bit for the post send table to identify local
operations.

Add a new field to the QP structure to track the number of local
operations on the send queue to determine if direct processing of new
local operations should be enabled/disabled.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
drivers/infiniband/sw/rdmavt/qp.c
include/rdma/rdmavt_qp.h