path: root/include/rdma/rdma_cm_ib.h
diff options
authorSean Hefty <sean.hefty@intel.com>2007-02-15 17:00:18 -0800
committerRoland Dreier <rolandd@cisco.com>2007-02-16 14:29:07 -0800
commitc8f6a362bf3eb28ade6027b49bb160a336dd51c0 (patch)
treeb9b19599c9fddea313725a359283bc624a86c1ec /include/rdma/rdma_cm_ib.h
parentIB/sa: Track multicast join/leave requests (diff)
RDMA/cma: Add multicast communication support
Extend rdma_cm to support multicast communication. Multicast support is added to the existing RDMA_PS_UDP port space, as well as a new RDMA_PS_IPOIB port space. The latter port space allows joining the multicast groups used by IPoIB, which enables offloading IPoIB traffic to a separate QP. The port space determines the signature used in the MGID when joining the group. The newly added RDMA_PS_IPOIB also allows for unicast operations, similar to RDMA_PS_UDP. Supporting the RDMA_PS_IPOIB requires changing how UD QPs are initialized, since we can no longer assume that the qkey is constant. This requires saving the Q_Key to use when attaching to a device, so that it is available when creating the QP. The Q_Key information is exported to the user through the existing rdma_init_qp_attr() interface. Multicast support is also exported to userspace through the rdma_ucm. Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'include/rdma/rdma_cm_ib.h')
1 files changed, 2 insertions, 2 deletions
diff --git a/include/rdma/rdma_cm_ib.h b/include/rdma/rdma_cm_ib.h
index 9b176df1d667..950424b38f16 100644
--- a/include/rdma/rdma_cm_ib.h
+++ b/include/rdma/rdma_cm_ib.h
@@ -44,7 +44,7 @@
int rdma_set_ib_paths(struct rdma_cm_id *id,
struct ib_sa_path_rec *path_rec, int num_paths);
-/* Global qkey for UD QPs and multicast groups. */
-#define RDMA_UD_QKEY 0x01234567
+/* Global qkey for UDP QPs and multicast groups. */
+#define RDMA_UDP_QKEY 0x01234567
#endif /* RDMA_CM_IB_H */