[PATCH net-next 12/18] IB/mlx5: Add kernel offload flow-tag

[Saeed Mahameed]

From: Maor Gottlieb <ma...@mellanox.com>

Add kernel offload flow tag for packets that will bypass the kernel
stack, e.g (RoCE/RDMA/RAW ETH (DPDK), etc ..).

User leftover FTEs are shared with sniffer, therefore leftover rules
should be added with the bypass flow-tag.

Signed-off-by: Maor Gottlieb <ma...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
 drivers/infiniband/hw/mlx5/main.c | 10 ++++++++--
 include/linux/mlx5/fs.h           |  1 +
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/main.c 
b/drivers/infiniband/hw/mlx5/main.c
index 60330c9..5af7c5f 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1534,6 +1534,7 @@ static struct mlx5_ib_flow_handler 
*create_flow_rule(struct mlx5_ib_dev *dev,
        unsigned int spec_index;
        u32 *match_c;
        u32 *match_v;
+       u32 flow_tag;
        u32 action;
        int err = 0;
 
@@ -1562,9 +1563,12 @@ static struct mlx5_ib_flow_handler 
*create_flow_rule(struct mlx5_ib_dev *dev,
        match_criteria_enable = (!outer_header_zero(match_c)) << 0;
        action = dst ? MLX5_FLOW_CONTEXT_ACTION_FWD_DEST :
                MLX5_FLOW_CONTEXT_ACTION_FWD_NEXT_PRIO;
+       flow_tag = (flow_attr->type == IB_FLOW_ATTR_ALL_DEFAULT ||
+                   flow_attr->type == IB_FLOW_ATTR_MC_DEFAULT) ?
+               MLX5_FS_OFFLOAD_FLOW_TAG : MLX5_FS_DEFAULT_FLOW_TAG;
 
        MLX5_RULE_ATTR(flow_rule_attr, match_criteria_enable, match_c,
-                      match_v, action, MLX5_FS_DEFAULT_FLOW_TAG, dst);
+                      match_v, action, flow_tag, dst);
        handler->rule = mlx5_add_flow_rule(ft, &flow_rule_attr);
 
        if (IS_ERR(handler->rule)) {
@@ -1619,12 +1623,13 @@ static struct mlx5_ib_flow_handler 
*create_leftovers_rule(struct mlx5_ib_dev *de
        struct mlx5_ib_flow_handler *handler_ucast = NULL;
        struct mlx5_ib_flow_handler *handler = NULL;
 
-       static struct {
+       struct {
                struct ib_flow_attr     flow_attr;
                struct ib_flow_spec_eth eth_flow;
        } leftovers_specs[] = {
                [LEFTOVERS_MC] = {
                        .flow_attr = {
+                               .type = flow_attr->type,
                                .num_of_specs = 1,
                                .size = sizeof(leftovers_specs[0])
                        },
@@ -1637,6 +1642,7 @@ static struct mlx5_ib_flow_handler 
*create_leftovers_rule(struct mlx5_ib_dev *de
                },
                [LEFTOVERS_UC] = {
                        .flow_attr = {
+                               .type = flow_attr->type,
                                .num_of_specs = 1,
                                .size = sizeof(leftovers_specs[0])
                        },
diff --git a/include/linux/mlx5/fs.h b/include/linux/mlx5/fs.h
index f3715eb..123b901 100644
--- a/include/linux/mlx5/fs.h
+++ b/include/linux/mlx5/fs.h
@@ -37,6 +37,7 @@
 #include <linux/mlx5/mlx5_ifc.h>
 
 #define MLX5_FS_DEFAULT_FLOW_TAG 0x0
+#define MLX5_FS_OFFLOAD_FLOW_TAG 0x800000
 
 enum {
        MLX5_FLOW_CONTEXT_ACTION_FWD_NEXT_PRIO  = 1 << 16,
-- 
2.8.0