[PATCH] net/mlx5/hws: fix shared context to use local defaults

[Erez Shitrit]

Fix default miss behavior for shared resources, the problem
could happen in two cases:
When the table created, the default miss should go to the alias ft
that will direct it back to local context.

When the rule is without specific hit address and we are in a shared
RTC from here it should be redirected back to the local context.

Fixes: ce946c7d3999 ("net/mlx5/hws: support ibv context shared with local one")
Cc: stable at dpdk.org

Signed-off-by: Erez Shitrit <erezsh at nvidia.com>
Reviewed-by: Alex Vesker <valex at nvidia.com>
Acked-by: Matan Azrad <matan at nvidia.com>
---
 drivers/net/mlx5/hws/mlx5dr_action.c |  9 ++++++++-
 drivers/net/mlx5/hws/mlx5dr_table.c  | 29 ++++++++++++++++++++++------
 2 files changed, 31 insertions(+), 7 deletions(-)

diff --git a/drivers/net/mlx5/hws/mlx5dr_action.c b/drivers/net/mlx5/hws/mlx5dr_action.c
index 2db62635c1..77cf1f5132 100644
--- a/drivers/net/mlx5/hws/mlx5dr_action.c
+++ b/drivers/net/mlx5/hws/mlx5dr_action.c
@@ -1751,8 +1751,15 @@ int mlx5dr_action_get_default_stc(struct mlx5dr_context *ctx,
 		goto free_nop_dw6;
 	}
 
-	stc_attr.action_type = MLX5_IFC_STC_ACTION_TYPE_ALLOW;
 	stc_attr.action_offset = MLX5DR_ACTION_OFFSET_HIT;
+	if (!mlx5dr_context_shared_gvmi_used(ctx)) {
+		stc_attr.action_type = MLX5_IFC_STC_ACTION_TYPE_ALLOW;
+	} else {
+		/* On shared gvmi the default hit behavior is jump to alias end ft */
+		stc_attr.action_type = MLX5_IFC_STC_ACTION_TYPE_JUMP_TO_FT;
+		stc_attr.dest_table_id = ctx->gvmi_res[tbl_type].aliased_end_ft->id;
+	}
+
 	ret = mlx5dr_action_alloc_single_stc(ctx, &stc_attr, tbl_type,
 					     &default_stc->default_hit);
 	if (ret) {
diff --git a/drivers/net/mlx5/hws/mlx5dr_table.c b/drivers/net/mlx5/hws/mlx5dr_table.c
index 327e2ec710..0e5e9b49ab 100644
--- a/drivers/net/mlx5/hws/mlx5dr_table.c
+++ b/drivers/net/mlx5/hws/mlx5dr_table.c
@@ -272,6 +272,9 @@ static void mlx5dr_table_uninit_shared_ctx_res(struct mlx5dr_table *tbl)
 /* called under spin_lock ctx->ctrl_lock */
 static int mlx5dr_table_init_shared_ctx_res(struct mlx5dr_context *ctx, struct mlx5dr_table *tbl)
 {
+	struct mlx5dr_cmd_ft_modify_attr ft_attr = {0};
+	int ret;
+
 	if (!mlx5dr_context_shared_gvmi_used(ctx))
 		return 0;
 
@@ -288,8 +291,22 @@ static int mlx5dr_table_init_shared_ctx_res(struct mlx5dr_context *ctx, struct m
 		goto clean_local_ft;
 	}
 
+	/* On shared gvmi the default behavior is jump to alias end ft */
+	mlx5dr_cmd_set_attr_connect_miss_tbl(tbl->ctx,
+					     tbl->fw_ft_type,
+					     tbl->type,
+					     &ft_attr);
+
+	ret = mlx5dr_cmd_flow_table_modify(tbl->ft, &ft_attr);
+	if (ret) {
+		DR_LOG(ERR, "Failed to point table to its default miss");
+		goto clean_shared_res;
+	}
+
 	return 0;
 
+clean_shared_res:
+	mlx5dr_table_put_shared_gvmi_res(tbl);
 clean_local_ft:
 	mlx5dr_table_destroy_default_ft(tbl, tbl->local_ft);
 	return rte_errno;
@@ -337,20 +354,20 @@ static int mlx5dr_table_init(struct mlx5dr_table *tbl)
 		return rte_errno;
 	}
 
-	ret = mlx5dr_action_get_default_stc(ctx, tbl->type);
+	ret = mlx5dr_table_init_shared_ctx_res(ctx, tbl);
 	if (ret)
 		goto tbl_destroy;
 
-	ret = mlx5dr_table_init_shared_ctx_res(ctx, tbl);
+	ret = mlx5dr_action_get_default_stc(ctx, tbl->type);
 	if (ret)
-		goto put_stc;
+		goto free_shared_ctx;
 
 	pthread_spin_unlock(&ctx->ctrl_lock);
 
 	return 0;
 
-put_stc:
-	mlx5dr_action_put_default_stc(ctx, tbl->type);
+free_shared_ctx:
+	mlx5dr_table_uninit_shared_ctx_res(tbl);
 tbl_destroy:
 	mlx5dr_table_destroy_default_ft(tbl, tbl->ft);
 	pthread_spin_unlock(&ctx->ctrl_lock);
@@ -363,8 +380,8 @@ static void mlx5dr_table_uninit(struct mlx5dr_table *tbl)
 		return;
 	pthread_spin_lock(&tbl->ctx->ctrl_lock);
 	mlx5dr_action_put_default_stc(tbl->ctx, tbl->type);
-	mlx5dr_table_destroy_default_ft(tbl, tbl->ft);
 	mlx5dr_table_uninit_shared_ctx_res(tbl);
+	mlx5dr_table_destroy_default_ft(tbl, tbl->ft);
 	pthread_spin_unlock(&tbl->ctx->ctrl_lock);
 }
 
-- 
2.18.2