From 47ee1b9f2e7bf73950602efe0b74fa1a8481f222 Mon Sep 17 00:00:00 2001
From: Ron Livne <ronli@voltaire.com>
Date: Mon, 14 Jul 2008 23:48:48 -0700
Subject: [PATCH] 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>
---
include/rdma/ib_verbs.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 10ebaaae0161..07b41e05565a 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -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 {
--
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