IB/core: Add support for IB L2 device-managed steering

This patch adds preliminary support for IB L2 device-managed steering,
currently exposed only in the kernel.

This flow spec can be used by low-level drivers that need to indicate
the link layer type when creating device-managed flow rules.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index d4d1639..aa24760 100644 (file)
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1100,13 +1100,14 @@ enum ib_flow_attr_type {
 enum ib_flow_spec_type {
        /* L2 headers*/
        IB_FLOW_SPEC_ETH        = 0x20,
+       IB_FLOW_SPEC_IB         = 0x22,
        /* L3 header*/
        IB_FLOW_SPEC_IPV4       = 0x30,
        /* L4 headers*/
        IB_FLOW_SPEC_TCP        = 0x40,
        IB_FLOW_SPEC_UDP        = 0x41
 };
-
+#define IB_FLOW_SPEC_LAYER_MASK        0xF0
 #define IB_FLOW_SPEC_SUPPORT_LAYERS 4
 
 /* Flow steering rule priority is set according to it's domain.
@@ -1134,6 +1135,18 @@ struct ib_flow_spec_eth {
        struct ib_flow_eth_filter mask;
 };
 
+struct ib_flow_ib_filter {
+       __be16 dlid;
+       __u8   sl;
+};
+
+struct ib_flow_spec_ib {
+       enum ib_flow_spec_type   type;
+       u16                      size;
+       struct ib_flow_ib_filter val;
+       struct ib_flow_ib_filter mask;
+};
+
 struct ib_flow_ipv4_filter {
        __be32  src_ip;
        __be32  dst_ip;
@@ -1164,6 +1177,7 @@ union ib_flow_spec {
                u16                     size;
        };
        struct ib_flow_spec_eth         eth;
+       struct ib_flow_spec_ib          ib;
        struct ib_flow_spec_ipv4        ipv4;
        struct ib_flow_spec_tcp_udp     tcp_udp;
 };