[dpdk-dev] [PATCH 4/6] net/mlx5: add OS specific flow type selection

[Dekel Peled <dekelp@mellanox.com>]

In current implementation the flow type (DV/Verbs) is selected
using dedicated function flow_get_drv_type().

This patch adds OS specific function mlx5_flow_os_get_type(), to
allow OS specific flow type selection.
The new function is called by flow_get_drv_type(), and if it returns a
valid value (DV/Verbs) no more logic is required.
Otherwise the existing logic is executed.

Signed-off-by: Dekel Peled <dekelp@mellanox.com>
---
 drivers/net/mlx5/linux/mlx5_flow_os.h | 18 ++++++++++++++++++
 drivers/net/mlx5/mlx5_flow.c          | 10 ++++++----
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/drivers/net/mlx5/linux/mlx5_flow_os.h b/drivers/net/mlx5/linux/mlx5_flow_os.h
index 4ad4e0a..41691a1 100644
--- a/drivers/net/mlx5/linux/mlx5_flow_os.h
+++ b/drivers/net/mlx5/linux/mlx5_flow_os.h
@@ -5,6 +5,24 @@
 #ifndef RTE_PMD_MLX5_FLOW_OS_H_
 #define RTE_PMD_MLX5_FLOW_OS_H_
 
+#include "mlx5_flow.h"
+
+#ifdef HAVE_IBV_FLOW_DV_SUPPORT
+extern const struct mlx5_flow_driver_ops mlx5_flow_dv_drv_ops;
+#endif
+
+/**
+ * Get OS enforced flow type. MLX5_FLOW_TYPE_MAX means "non enforced type".
+ *
+ * @return
+ *   Flow type (MLX5_FLOW_TYPE_MAX)
+ */
+static inline enum mlx5_flow_drv_type
+mlx5_flow_os_get_type(void)
+{
+	return MLX5_FLOW_TYPE_MAX;
+}
+
 /**
  * Check if item type is supported.
  *
diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 4700ec1..b8468c1 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -36,12 +36,10 @@
 #include "mlx5_defs.h"
 #include "mlx5.h"
 #include "mlx5_flow.h"
+#include "mlx5_flow_os.h"
 #include "mlx5_rxtx.h"
 
 /** Device flow drivers. */
-#ifdef HAVE_IBV_FLOW_DV_SUPPORT
-extern const struct mlx5_flow_driver_ops mlx5_flow_dv_drv_ops;
-#endif
 extern const struct mlx5_flow_driver_ops mlx5_flow_verbs_drv_ops;
 
 const struct mlx5_flow_driver_ops mlx5_flow_null_drv_ops;
@@ -2501,8 +2499,12 @@ uint32_t mlx5_flow_adjust_priority(struct rte_eth_dev *dev, int32_t priority,
 flow_get_drv_type(struct rte_eth_dev *dev, const struct rte_flow_attr *attr)
 {
 	struct mlx5_priv *priv = dev->data->dev_private;
-	enum mlx5_flow_drv_type type = MLX5_FLOW_TYPE_MAX;
+	/* The OS can determine first a specific flow type (DV, VERBS) */
+	enum mlx5_flow_drv_type type = mlx5_flow_os_get_type();
 
+	if (type != MLX5_FLOW_TYPE_MAX)
+		return type;
+	/* If no OS specific type - continue with DV/VERBS selection */
 	if (attr->transfer && priv->config.dv_esw_en)
 		type = MLX5_FLOW_TYPE_DV;
 	if (!attr->transfer)
-- 
1.8.3.1