[PATCH rdma-next 2/3] IB/core: Support rate limit for packet pacing

[Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

From: Bodong Wang <bodong-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>

Add new member rate_limit to ib_qp_attr, it shows the packet pacing rate
in Kbps, 0 means unlimited.

IB_QP_RATE_LIMIT is added to ib_attr_mask, and it could be used by RAW
QPs when changing QP state from RTR to RTS, RTS to RTS.

Signed-off-by: Bodong Wang <bodong-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 drivers/infiniband/core/verbs.c | 2 ++
 include/rdma/ib_verbs.h         | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index f2b776e..1221215 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -992,6 +992,7 @@ static const struct {
 						 IB_QP_QKEY),
 				 [IB_QPT_GSI] = (IB_QP_CUR_STATE		|
 						 IB_QP_QKEY),
+				 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
 			 }
 		}
 	},
@@ -1025,6 +1026,7 @@ static const struct {
 						IB_QP_QKEY),
 				[IB_QPT_GSI] = (IB_QP_CUR_STATE			|
 						IB_QP_QKEY),
+				[IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
 			}
 		},
 		[IB_QPS_SQD]   = {
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 8e90dd2..b27f233 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1088,6 +1088,7 @@ enum ib_qp_attr_mask {
 	IB_QP_RESERVED2			= (1<<22),
 	IB_QP_RESERVED3			= (1<<23),
 	IB_QP_RESERVED4			= (1<<24),
+	IB_QP_RATE_LIMIT		= (1<<25),
 };
 
 enum ib_qp_state {
@@ -1137,6 +1138,7 @@ struct ib_qp_attr {
 	u8			rnr_retry;
 	u8			alt_port_num;
 	u8			alt_timeout;
+	u32			rate_limit;
 };
 
 enum ib_wr_opcode {
-- 
2.7.4

--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html