From: Roi Dayan <roid@nvidia.com>
Date: Thu, 12 Aug 2021 15:46:34 +0300
Subject: net/mlx5e: Move mod hdr allocation to a single place
Patch-mainline: v5.16-rc1
Git-commit: d9581e2fa73fadba187b2e62e05306e24e8a1ded
References: jsc#SLE-19253

Move mod hdr allocation chunk from parse_tc_fdb_actions() and
parse_tc_nic_actions() to a shared function.

Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c |   87 ++++++++++++++----------
 1 file changed, 51 insertions(+), 36 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -3356,11 +3356,51 @@ static int validate_goto_chain(struct ml
 	return 0;
 }
 
-static int parse_tc_nic_actions(struct mlx5e_priv *priv,
-				struct flow_action *flow_action,
+static int
+actions_prepare_mod_hdr_actions(struct mlx5e_priv *priv,
 				struct mlx5e_tc_flow *flow,
+				struct mlx5_flow_attr *attr,
+				struct pedit_headers_action *hdrs,
 				struct netlink_ext_ack *extack)
 {
+	struct mlx5e_tc_flow_parse_attr *parse_attr = attr->parse_attr;
+	enum mlx5_flow_namespace_type ns_type;
+	int err;
+
+	if (!hdrs[TCA_PEDIT_KEY_EX_CMD_SET].pedits &&
+	    !hdrs[TCA_PEDIT_KEY_EX_CMD_ADD].pedits)
+		return 0;
+
+	ns_type = get_flow_name_space(flow);
+
+	err = alloc_tc_pedit_action(priv, ns_type, parse_attr, hdrs,
+				    &attr->action, extack);
+	if (err)
+		return err;
+
+	/* In case all pedit actions are skipped, remove the MOD_HDR flag. */
+	if (parse_attr->mod_hdr_acts.num_actions > 0)
+		return 0;
+
+	attr->action &= ~MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
+	dealloc_mod_hdr_actions(&parse_attr->mod_hdr_acts);
+
+	if (ns_type != MLX5_FLOW_NAMESPACE_FDB)
+		return 0;
+
+	if (!((attr->action & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP) ||
+	      (attr->action & MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH)))
+		attr->esw_attr->split_count = 0;
+
+	return 0;
+}
+
+static int
+parse_tc_nic_actions(struct mlx5e_priv *priv,
+		     struct flow_action *flow_action,
+		     struct mlx5e_tc_flow *flow,
+		     struct netlink_ext_ack *extack)
+{
 	struct mlx5e_tc_flow_parse_attr *parse_attr;
 	struct mlx5_flow_attr *attr = flow->attr;
 	struct pedit_headers_action hdrs[2] = {};
@@ -3469,21 +3509,6 @@ static int parse_tc_nic_actions(struct m
 		}
 	}
 
-	if (hdrs[TCA_PEDIT_KEY_EX_CMD_SET].pedits ||
-	    hdrs[TCA_PEDIT_KEY_EX_CMD_ADD].pedits) {
-		err = alloc_tc_pedit_action(priv, MLX5_FLOW_NAMESPACE_KERNEL,
-					    parse_attr, hdrs, &action, extack);
-		if (err)
-			return err;
-		/* in case all pedit actions are skipped, remove the MOD_HDR
-		 * flag.
-		 */
-		if (parse_attr->mod_hdr_acts.num_actions == 0) {
-			action &= ~MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
-			dealloc_mod_hdr_actions(&parse_attr->mod_hdr_acts);
-		}
-	}
-
 	attr->action = action;
 
 	if (attr->dest_chain && parse_attr->mirred_ifindex[0]) {
@@ -3491,6 +3516,10 @@ static int parse_tc_nic_actions(struct m
 		return -EOPNOTSUPP;
 	}
 
+	err = actions_prepare_mod_hdr_actions(priv, flow, attr, hdrs, extack);
+	if (err)
+		return err;
+
 	if (!actions_match_supported(priv, flow_action, parse_attr, flow, extack))
 		return -EOPNOTSUPP;
 
@@ -4045,26 +4074,12 @@ static int parse_tc_fdb_actions(struct m
 			return err;
 	}
 
-	if (hdrs[TCA_PEDIT_KEY_EX_CMD_SET].pedits ||
-	    hdrs[TCA_PEDIT_KEY_EX_CMD_ADD].pedits) {
-		err = alloc_tc_pedit_action(priv, MLX5_FLOW_NAMESPACE_FDB,
-					    parse_attr, hdrs, &action, extack);
-		if (err)
-			return err;
-		/* in case all pedit actions are skipped, remove the MOD_HDR
-		 * flag. we might have set split_count either by pedit or
-		 * pop/push. if there is no pop/push either, reset it too.
-		 */
-		if (parse_attr->mod_hdr_acts.num_actions == 0) {
-			action &= ~MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
-			dealloc_mod_hdr_actions(&parse_attr->mod_hdr_acts);
-			if (!((action & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP) ||
-			      (action & MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH)))
-				esw_attr->split_count = 0;
-		}
-	}
-
 	attr->action = action;
+
+	err = actions_prepare_mod_hdr_actions(priv, flow, attr, hdrs, extack);
+	if (err)
+		return err;
+
 	if (!actions_match_supported(priv, flow_action, parse_attr, flow, extack))
 		return -EOPNOTSUPP;