IB/core: Support rate limit for packet pacing

Add new member rate_limit to ib_qp_attr which holds the packet pacing rate
in kbps, 0 means unlimited.

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

Signed-off-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index c976f29..71580cc 100644 (file)
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1016,6 +1016,7 @@ static const struct {
                                                 IB_QP_QKEY),
                                 [IB_QPT_GSI] = (IB_QP_CUR_STATE                |
                                                 IB_QP_QKEY),
+                                [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
                         }
                }
        },
@@ -1049,6 +1050,7 @@ 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 73417a2..8029d2a 100644 (file)
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1102,6 +1102,7 @@ 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 {
@@ -1151,6 +1152,7 @@ struct ib_qp_attr {
        u8                      rnr_retry;
        u8                      alt_port_num;
        u8                      alt_timeout;
+       u32                     rate_limit;
 };
 
 enum ib_wr_opcode {