netdev - [PATCH mlx5-next 11/16] net/mlx5: Add VDPA priority to NIC RX namespace

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Date:   Fri, 20 Nov 2020 15:03:34 -0800
From:   Saeed Mahameed <saeedm@...dia.com>
To:     Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leonro@...lanox.com>
CC:     <netdev@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
        Eli Cohen <eli@...lanox.com>, Mark Bloch <mbloch@...dia.com>,
        Maor Gottlieb <maorg@...dia.com>
Subject: [PATCH mlx5-next 11/16] net/mlx5: Add VDPA priority to NIC RX namespace

From: Eli Cohen <eli@...lanox.com>

Add a new namespace type to the NIC RX root namespace to allow for
inserting VDPA rules before regular NIC but after bypass, thus allowing
DPDK to have precedence in packet processing.

Signed-off-by: Eli Cohen <eli@...lanox.com>
Reviewed-by: Mark Bloch <mbloch@...dia.com>
Reviewed-by: Maor Gottlieb <maorg@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 10 +++++++++-
 include/linux/mlx5/fs.h                           |  1 +
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index 16091838bfcf..e095c5968e67 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -118,6 +118,10 @@
 #define ANCHOR_NUM_PRIOS 1
 #define ANCHOR_MIN_LEVEL (BY_PASS_MIN_LEVEL + 1)
 
+#define VDPA_PRIO_NUM_LEVELS 1
+#define VDPA_NUM_PRIOS 1
+#define VDPA_MIN_LEVEL 1
+
 #define OFFLOADS_MAX_FT 2
 #define OFFLOADS_NUM_PRIOS 2
 #define OFFLOADS_MIN_LEVEL (ANCHOR_MIN_LEVEL + OFFLOADS_NUM_PRIOS)
@@ -147,7 +151,7 @@ static struct init_tree_node {
 	enum mlx5_flow_table_miss_action def_miss_action;
 } root_fs = {
 	.type = FS_TYPE_NAMESPACE,
-	.ar_size = 7,
+	.ar_size = 8,
 	  .children = (struct init_tree_node[]){
 		  ADD_PRIO(0, BY_PASS_MIN_LEVEL, 0, FS_CHAINING_CAPS,
 			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
@@ -165,6 +169,10 @@ static struct init_tree_node {
 			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
 				  ADD_MULTIPLE_PRIO(ETHTOOL_NUM_PRIOS,
 						    ETHTOOL_PRIO_NUM_LEVELS))),
+		  ADD_PRIO(0, VDPA_MIN_LEVEL, 0, FS_CHAINING_CAPS,
+			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				  ADD_MULTIPLE_PRIO(VDPA_NUM_PRIOS,
+						    VDPA_PRIO_NUM_LEVELS))),
 		  ADD_PRIO(0, KERNEL_MIN_LEVEL, 0, {},
 			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
 				  ADD_MULTIPLE_PRIO(KERNEL_NIC_TC_NUM_PRIOS,
diff --git a/include/linux/mlx5/fs.h b/include/linux/mlx5/fs.h
index 35d2cc1646d3..97176d623d74 100644
--- a/include/linux/mlx5/fs.h
+++ b/include/linux/mlx5/fs.h
@@ -67,6 +67,7 @@ enum mlx5_flow_namespace_type {
 	MLX5_FLOW_NAMESPACE_LAG,
 	MLX5_FLOW_NAMESPACE_OFFLOADS,
 	MLX5_FLOW_NAMESPACE_ETHTOOL,
+	MLX5_FLOW_NAMESPACE_VDPA,
 	MLX5_FLOW_NAMESPACE_KERNEL,
 	MLX5_FLOW_NAMESPACE_LEFTOVERS,
 	MLX5_FLOW_NAMESPACE_ANCHOR,
-- 
2.26.2