netdev - [net 10/10] Revert "net/mlx5e: Don't use termination table when redundant"

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Date:   Wed, 19 Apr 2023 18:09:59 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>
Cc:     Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>,
        Vlad Buslov <vladbu@...dia.com>, Roi Dayan <roid@...dia.com>,
        Maor Dickman <maord@...dia.com>
Subject: [net 10/10] Revert "net/mlx5e: Don't use termination table when redundant"

From: Vlad Buslov <vladbu@...dia.com>

This reverts commit 14624d7247fcd0f3114a6f5f17b3c8d1020fbbb7.

The termination table usage is requires for DMFS steering mode as firmware
doesn't support mixed table destinations list which causes following
syndrome with hairpin rules:

[81922.283225] mlx5_core 0000:08:00.0: mlx5_cmd_out_err:803:(pid 25977): SET_FLOW_TABLE_ENTRY(0x936) op_mod(0x0) failed, status bad parameter(0x3), syndrome (0xaca205), err(-22)

Fixes: 14624d7247fc ("net/mlx5e: Don't use termination table when redundant")
Signed-off-by: Vlad Buslov <vladbu@...dia.com>
Reviewed-by: Roi Dayan <roid@...dia.com>
Reviewed-by: Maor Dickman <maord@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 .../mlx5/core/eswitch_offloads_termtbl.c      | 32 +++----------------
 1 file changed, 4 insertions(+), 28 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_termtbl.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_termtbl.c
index 3a9a6bb9158d..edd910258314 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_termtbl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_termtbl.c
@@ -210,18 +210,6 @@ static bool mlx5_eswitch_offload_is_uplink_port(const struct mlx5_eswitch *esw,
 	return (port_mask & port_value) == MLX5_VPORT_UPLINK;
 }
 
-static bool
-mlx5_eswitch_is_push_vlan_no_cap(struct mlx5_eswitch *esw,
-				 struct mlx5_flow_act *flow_act)
-{
-	if (flow_act->action & MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH &&
-	    !(mlx5_fs_get_capabilities(esw->dev, MLX5_FLOW_NAMESPACE_FDB) &
-	      MLX5_FLOW_STEERING_CAP_VLAN_PUSH_ON_RX))
-		return true;
-
-	return false;
-}
-
 bool
 mlx5_eswitch_termtbl_required(struct mlx5_eswitch *esw,
 			      struct mlx5_flow_attr *attr,
@@ -237,7 +225,10 @@ mlx5_eswitch_termtbl_required(struct mlx5_eswitch *esw,
 	    (!mlx5_eswitch_offload_is_uplink_port(esw, spec) && !esw_attr->int_port))
 		return false;
 
-	if (mlx5_eswitch_is_push_vlan_no_cap(esw, flow_act))
+	/* push vlan on RX */
+	if (flow_act->action & MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH &&
+	    !(mlx5_fs_get_capabilities(esw->dev, MLX5_FLOW_NAMESPACE_FDB) &
+	      MLX5_FLOW_STEERING_CAP_VLAN_PUSH_ON_RX))
 		return true;
 
 	/* hairpin */
@@ -261,31 +252,19 @@ mlx5_eswitch_add_termtbl_rule(struct mlx5_eswitch *esw,
 	struct mlx5_flow_act term_tbl_act = {};
 	struct mlx5_flow_handle *rule = NULL;
 	bool term_table_created = false;
-	bool is_push_vlan_on_rx;
 	int num_vport_dests = 0;
 	int i, curr_dest;
 
-	is_push_vlan_on_rx = mlx5_eswitch_is_push_vlan_no_cap(esw, flow_act);
 	mlx5_eswitch_termtbl_actions_move(flow_act, &term_tbl_act);
 	term_tbl_act.action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
 
 	for (i = 0; i < num_dest; i++) {
 		struct mlx5_termtbl_handle *tt;
-		bool hairpin = false;
 
 		/* only vport destinations can be terminated */
 		if (dest[i].type != MLX5_FLOW_DESTINATION_TYPE_VPORT)
 			continue;
 
-		if (attr->dests[num_vport_dests].rep &&
-		    attr->dests[num_vport_dests].rep->vport == MLX5_VPORT_UPLINK)
-			hairpin = true;
-
-		if (!is_push_vlan_on_rx && !hairpin) {
-			num_vport_dests++;
-			continue;
-		}
-
 		if (attr->dests[num_vport_dests].flags & MLX5_ESW_DEST_ENCAP) {
 			term_tbl_act.action |= MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT;
 			term_tbl_act.pkt_reformat = attr->dests[num_vport_dests].pkt_reformat;
@@ -333,9 +312,6 @@ mlx5_eswitch_add_termtbl_rule(struct mlx5_eswitch *esw,
 	for (curr_dest = 0; curr_dest < num_vport_dests; curr_dest++) {
 		struct mlx5_termtbl_handle *tt = attr->dests[curr_dest].termtbl;
 
-		if (!tt)
-			continue;
-
 		attr->dests[curr_dest].termtbl = NULL;
 
 		/* search for the destination associated with the
-- 
2.39.2