IB/hfi1: Add the capability for reserved operations
authorMike Marciniszyn <mike.marciniszyn@intel.com>
Mon, 25 Jul 2016 20:39:39 +0000 (13:39 -0700)
committerDoug Ledford <dledford@redhat.com>
Tue, 2 Aug 2016 20:00:58 +0000 (16:00 -0400)
commit856cc4c237add46510c8ae91764f4eda31a9e1cf
tree346dbab7f942e9afd36b7c1b2bb25451d3106e36
parent23002d5b08ccbbf0902bbc3430293629a1fa12c6
IB/hfi1: Add the capability for reserved operations

This fix allows for support of in-kernel reserved operations
without impacting the ULP user.

The low level driver can register a non-zero value which
will be transparently added to the send queue size and hidden
from the ULP in every respect.

ULP post sends will never see a full queue due to a reserved
post send and reserved operations will never exceed that
registered value.

The s_avail will continue to track the ULP swqe availability
and the difference between the reserved value and the reserved
in use will track reserved availabity.

Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@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/rdma_vt.h
include/rdma/rdmavt_qp.h