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, 5 insertions, 0 deletions

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 40ff51244d19..c3299be41c6f 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -495,6 +495,10 @@ enum ib_qp_type {
         IB_QPT_RAW_ETY
 };
 
+enum ib_qp_create_flags {
+        IB_QP_CREATE_IPOIB_UD_LSO       = 1 << 0,
+};
+
 struct ib_qp_init_attr {
         void                  (*event_handler)(struct ib_event *, void *);
         void                   *qp_context;
@@ -504,6 +508,7 @@ struct ib_qp_init_attr {
         struct ib_qp_cap        cap;
         enum ib_sig_type        sq_sig_type;
         enum ib_qp_type         qp_type;
+        enum ib_qp_create_flags create_flags;
         u8                      port_num; /* special QP types only */
 };