diff options
| author | Sean Hefty <sean.hefty@intel.com> | 2007-02-15 17:00:18 -0800 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-02-16 14:29:07 -0800 |
| commit | c8f6a362bf3eb28ade6027b49bb160a336dd51c0 (patch) | |
| tree | b9b19599c9fddea313725a359283bc624a86c1ec /include/rdma/rdma_cm_ib.h | |
| parent | faec2f7b96b555055d0aa6cc6b83a537270bed52 (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')
| -rw-r--r-- | include/rdma/rdma_cm_ib.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/rdma/rdma_cm_ib.h b/include/rdma/rdma_cm_ib.h index 9b176df1d66..950424b38f1 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 */ |