net/mlx5: E-Switch, Add API to create vport rx rules

Add the API to create vport rx rules of the form

	packet meta-data :: vport == $VPORT --> $TIR

where the TIR is opened by this VF representor.

This logic will by used for packets that didn't match any rule in the
e-switch datapath and should be received into the host OS through the
netdevice that represents the VF they were sent from.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 32db37a..cf959f7 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -157,6 +157,7 @@ enum {
 
 struct mlx5_esw_offload {
        struct mlx5_flow_table *ft_offloads;
+       struct mlx5_flow_group *vport_rx_group;
 };
 
 struct mlx5_eswitch {
@@ -201,6 +202,9 @@ int mlx5_eswitch_get_vport_stats(struct mlx5_eswitch *esw,
 struct mlx5_flow_rule *
 mlx5_eswitch_add_send_to_vport_rule(struct mlx5_eswitch *esw, int vport, u32 sqn);
 
+struct mlx5_flow_rule *
+mlx5_eswitch_create_vport_rx_rule(struct mlx5_eswitch *esw, int vport, u32 tirn);
+
 #define MLX5_DEBUG_ESWITCH_MASK BIT(3)
 
 #define esw_info(dev, format, ...)                             \

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index e895c6f..7aad367 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -243,3 +243,88 @@ static void esw_destroy_offloads_table(struct mlx5_eswitch *esw)
 
        mlx5_destroy_flow_table(offloads->ft_offloads);
 }
+
+static int esw_create_vport_rx_group(struct mlx5_eswitch *esw)
+{
+       int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
+       struct mlx5_flow_group *g;
+       struct mlx5_priv *priv = &esw->dev->priv;
+       u32 *flow_group_in;
+       void *match_criteria, *misc;
+       int err = 0;
+       int nvports = priv->sriov.num_vfs + 2;
+
+       flow_group_in = mlx5_vzalloc(inlen);
+       if (!flow_group_in)
+               return -ENOMEM;
+
+       /* create vport rx group */
+       memset(flow_group_in, 0, inlen);
+       MLX5_SET(create_flow_group_in, flow_group_in, match_criteria_enable,
+                MLX5_MATCH_MISC_PARAMETERS);
+
+       match_criteria = MLX5_ADDR_OF(create_flow_group_in, flow_group_in, match_criteria);
+       misc = MLX5_ADDR_OF(fte_match_param, match_criteria, misc_parameters);
+       MLX5_SET_TO_ONES(fte_match_set_misc, misc, source_port);
+
+       MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index, 0);
+       MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index, nvports - 1);
+
+       g = mlx5_create_flow_group(esw->offloads.ft_offloads, flow_group_in);
+
+       if (IS_ERR(g)) {
+               err = PTR_ERR(g);
+               mlx5_core_warn(esw->dev, "Failed to create vport rx group err %d\n", err);
+               goto out;
+       }
+
+       esw->offloads.vport_rx_group = g;
+out:
+       kfree(flow_group_in);
+       return err;
+}
+
+static void esw_destroy_vport_rx_group(struct mlx5_eswitch *esw)
+{
+       mlx5_destroy_flow_group(esw->offloads.vport_rx_group);
+}
+
+struct mlx5_flow_rule *
+mlx5_eswitch_create_vport_rx_rule(struct mlx5_eswitch *esw, int vport, u32 tirn)
+{
+       struct mlx5_flow_destination dest;
+       struct mlx5_flow_rule *flow_rule;
+       int match_header = MLX5_MATCH_MISC_PARAMETERS;
+       u32 *match_v, *match_c;
+       void *misc;
+
+       match_v = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
+       match_c = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
+       if (!match_v || !match_c) {
+               esw_warn(esw->dev, "Failed to alloc match parameters\n");
+               flow_rule = ERR_PTR(-ENOMEM);
+               goto out;
+       }
+
+       misc = MLX5_ADDR_OF(fte_match_param, match_v, misc_parameters);
+       MLX5_SET(fte_match_set_misc, misc, source_port, vport);
+
+       misc = MLX5_ADDR_OF(fte_match_param, match_c, misc_parameters);
+       MLX5_SET_TO_ONES(fte_match_set_misc, misc, source_port);
+
+       dest.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
+       dest.tir_num = tirn;
+
+       flow_rule = mlx5_add_flow_rule(esw->offloads.ft_offloads, match_header, match_c,
+                                      match_v, MLX5_FLOW_CONTEXT_ACTION_FWD_DEST,
+                                      0, &dest);
+       if (IS_ERR(flow_rule)) {
+               esw_warn(esw->dev, "fs offloads: Failed to add vport rx rule err %ld\n", PTR_ERR(flow_rule));
+               goto out;
+       }
+
+out:
+       kfree(match_v);
+       kfree(match_c);
+       return flow_rule;
+}