commit 64fc4b358941fc2e9ee38b8b870ea0dac7639494
author Vlad Buslov <vladbu@nvidia.com> Thu Sep 02 11:12:16 2021 +0300
committer Saeed Mahameed <saeedm@nvidia.com> Mon Oct 04 18:10:56 2021 -0700
tree 51a8ebd08b1e816a292d8dc4ee1f5c6c24e34bac
parent a1a6e7217eacf2c19a518d3adbe8ae3b4fd93a73

net/mlx5: Bridge, extract VLAN pop code to dedicated functions

Following patches in series need to pop VLAN when packet misses on egress.
To reuse existing bridge VLAN pop handling code, extract it to dedicated
helpers mlx5_esw_bridge_pkt_reformat_vlan_pop_supported() and
mlx5_esw_bridge_pkt_reformat_vlan_pop_create().

Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.c

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.c
index 6a36c5a..8361dfc 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.c
@@ -86,6 +86,26 @@
 						   SWITCHDEV_FDB_DEL_TO_BRIDGE);
 }
 
+static bool mlx5_esw_bridge_pkt_reformat_vlan_pop_supported(struct mlx5_eswitch *esw)
+{
+	return BIT(MLX5_CAP_ESW_FLOWTABLE_FDB(esw->dev, reformat_remove)) &&
+		MLX5_CAP_GEN_2(esw->dev, max_reformat_remove_size) >= sizeof(struct vlan_hdr) &&
+		MLX5_CAP_GEN_2(esw->dev, max_reformat_remove_offset) >=
+		offsetof(struct vlan_ethhdr, h_vlan_proto);
+}
+
+static struct mlx5_pkt_reformat *
+mlx5_esw_bridge_pkt_reformat_vlan_pop_create(struct mlx5_eswitch *esw)
+{
+	struct mlx5_pkt_reformat_params reformat_params = {};
+
+	reformat_params.type = MLX5_REFORMAT_TYPE_REMOVE_HDR;
+	reformat_params.param_0 = MLX5_REFORMAT_CONTEXT_ANCHOR_MAC_START;
+	reformat_params.param_1 = offsetof(struct vlan_ethhdr, h_vlan_proto);
+	reformat_params.size = sizeof(struct vlan_hdr);
+	return mlx5_packet_reformat_alloc(esw->dev, &reformat_params, MLX5_FLOW_NAMESPACE_FDB);
+}
+
 static struct mlx5_flow_table *
 mlx5_esw_bridge_table_create(int max_fte, u32 level, struct mlx5_eswitch *esw)
 {
@@ -800,24 +820,14 @@
 static int
 mlx5_esw_bridge_vlan_pop_create(struct mlx5_esw_bridge_vlan *vlan, struct mlx5_eswitch *esw)
 {
-	struct mlx5_pkt_reformat_params reformat_params = {};
 	struct mlx5_pkt_reformat *pkt_reformat;
 
-	if (!BIT(MLX5_CAP_ESW_FLOWTABLE_FDB(esw->dev, reformat_remove)) ||
-	    MLX5_CAP_GEN_2(esw->dev, max_reformat_remove_size) < sizeof(struct vlan_hdr) ||
-	    MLX5_CAP_GEN_2(esw->dev, max_reformat_remove_offset) <
-	    offsetof(struct vlan_ethhdr, h_vlan_proto)) {
+	if (!mlx5_esw_bridge_pkt_reformat_vlan_pop_supported(esw)) {
 		esw_warn(esw->dev, "Packet reformat REMOVE_HEADER is not supported\n");
 		return -EOPNOTSUPP;
 	}
 
-	reformat_params.type = MLX5_REFORMAT_TYPE_REMOVE_HDR;
-	reformat_params.param_0 = MLX5_REFORMAT_CONTEXT_ANCHOR_MAC_START;
-	reformat_params.param_1 = offsetof(struct vlan_ethhdr, h_vlan_proto);
-	reformat_params.size = sizeof(struct vlan_hdr);
-	pkt_reformat = mlx5_packet_reformat_alloc(esw->dev,
-						  &reformat_params,
-						  MLX5_FLOW_NAMESPACE_FDB);
+	pkt_reformat = mlx5_esw_bridge_pkt_reformat_vlan_pop_create(esw);
 	if (IS_ERR(pkt_reformat)) {
 		esw_warn(esw->dev, "Failed to alloc packet reformat REMOVE_HEADER (err=%ld)\n",
 			 PTR_ERR(pkt_reformat));