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IB/core: Add support for multicast loopback blocking 

This patch also adds a creation flag for QPs,
IB_QP_CREATE_MULTICAST_BLOCK_LOOPBACK, which when set means that
multicast sends from the QP to a group that the QP is attached to will
not be looped back to the QP's receive queue.  This can be used to
save receive resources when a consumer does not want a local copy of
multicast traffic; for example IPoIB must waste CPU time throwing away
such local copies of multicast traffic.

This patch also adds a device capability flag that shows whether a
device supports this feature or not.

Signed-off-by: Ron Livne <ronli@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Ron Livne 2008-07-14 23:48:48 -07:00 committed by Roland Dreier
parent 14cc180f7b
commit 47ee1b9f2e
1 changed files with 3 additions and 1 deletions
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4
include/rdma/ib_verbs.h
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@ -104,6 +104,7 @@ enum ib_device_cap_flags {
IB_DEVICE_UD_IP_CSUM = (1<<18),
IB_DEVICE_UD_TSO = (1<<19),
IB_DEVICE_MEM_MGT_EXTENSIONS = (1<<21),
IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1<<22),
};
enum ib_atomic_cap {
@ -555,7 +556,8 @@ enum ib_qp_type {
};
enum ib_qp_create_flags {
IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0,
IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0,
IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK = 1 << 1,
};
struct ib_qp_init_attr {