IB/core: Add creation flags to struct ib_qp_init_attr

Add a create_flags member to struct ib_qp_init_attr that will allow a
kernel verbs consumer to create a pass special flags when creating a QP.
Add a flag value for telling low-level drivers that a QP will be used
for IPoIB UD LSO.  The create_flags member will also be useful for XRC
and ehca low-latency QP support.

Since no create_flags handling is implemented yet, add code to all
low-level drivers to return -EINVAL if create_flags is non-zero.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c
index 46b3b8ebcc14..7c27420c2240 100644
--- a/drivers/infiniband/hw/nes/nes_verbs.c
+++ b/drivers/infiniband/hw/nes/nes_verbs.c
@@ -1252,6 +1252,9 @@ static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
         u8 rq_encoded_size;
         /* int counter; */
 
+        if (init_attr->create_flags)
+                return ERR_PTR(-EINVAL);
+
         atomic_inc(&qps_created);
         switch (init_attr->qp_type) {
                 case IB_QPT_RC: