[PATCH] net/mlx5: fix flow mark value missing on combination split

[Jiawei Wang]

If there are sample action and the meter action in the same flow,
mlx5 PMD performs several levels of splitting. For example, sampling
feature splits the original flow into prefix subflow with sample action,
and suffix subflow with the rest of actions. Then, metering feature
splits the sampling suffix subflow into its own meter subflows.
If mark action was added before the sample and meter action, the
flow mark flag was kept in the sample subflows but reset on
handling the metering split, causing the flow mark value missed.

This patch keeps the flow mark flag of previous subflow, and then
the following meter subflows handle the flow mark correctly.

Fixes: 9ade91dfe85d ("net/mlx5: fix group value of sample suffix flow")
Cc: stable at dpdk.org

Signed-off-by: Jiawei Wang <jiaweiw at nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
---
 drivers/net/mlx5/mlx5_flow.c | 5 ++---
 drivers/net/mlx5/mlx5_flow.h | 8 ++++----
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index a30ce695aa..f34e4b88aa 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -6096,7 +6096,6 @@ flow_create_split_meter(struct rte_eth_dev *dev,
 			goto exit;
 		}
 		/* Add the prefix subflow. */
-		flow_split_info->prefix_mark = 0;
 		skip_scale_restore = flow_split_info->skip_scale;
 		flow_split_info->skip_scale |=
 			1 << MLX5_SCALE_JUMP_FLOW_GROUP_BIT;
@@ -6129,7 +6128,7 @@ flow_create_split_meter(struct rte_eth_dev *dev,
 				 MLX5_FLOW_TABLE_LEVEL_METER;
 		flow_split_info->prefix_layers =
 				flow_get_prefix_layer_flags(dev_flow);
-		flow_split_info->prefix_mark = dev_flow->handle->mark;
+		flow_split_info->prefix_mark |= dev_flow->handle->mark;
 		flow_split_info->table_id = MLX5_MTR_TABLE_ID_SUFFIX;
 	}
 	/* Add the prefix subflow. */
@@ -6281,7 +6280,7 @@ flow_create_split_sample(struct rte_eth_dev *dev,
 		}
 		flow_split_info->prefix_layers =
 				flow_get_prefix_layer_flags(dev_flow);
-		flow_split_info->prefix_mark = dev_flow->handle->mark;
+		flow_split_info->prefix_mark |= dev_flow->handle->mark;
 		/* Suffix group level already be scaled with factor, set
 		 * MLX5_SCALE_FLOW_GROUP_BIT of skip_scale to 1 to avoid scale
 		 * again in translation.
diff --git a/drivers/net/mlx5/mlx5_flow.h b/drivers/net/mlx5/mlx5_flow.h
index 1de2f2edb0..1f54649c69 100644
--- a/drivers/net/mlx5/mlx5_flow.h
+++ b/drivers/net/mlx5/mlx5_flow.h
@@ -1111,13 +1111,13 @@ struct mlx5_flow_workspace {
 };
 
 struct mlx5_flow_split_info {
-	bool external;
+	uint32_t external:1;
 	/**< True if flow is created by request external to PMD. */
-	uint8_t skip_scale; /**< Skip the scale the table with factor. */
+	uint32_t prefix_mark:1; /**< Prefix subflow mark flag. */
+	uint32_t skip_scale:8; /**< Skip the scale the table with factor. */
 	uint32_t flow_idx; /**< This memory pool index to the flow. */
-	uint32_t prefix_mark; /**< Prefix subflow mark flag. */
-	uint64_t prefix_layers; /**< Prefix subflow layers. */
 	uint32_t table_id; /**< Flow table identifier. */
+	uint64_t prefix_layers; /**< Prefix subflow layers. */
 };
 
 typedef int (*mlx5_flow_validate_t)(struct rte_eth_dev *dev,
-- 
2.18.1