[PATCH v3 03/21] net/mlx5: replace verbs priorities by flow

[Nelio Laranjeiro <nelio.laranjeiro@6wind.com>]

Previous work introduce verbs priorities, whereas the PMD is making
translation between Flow priority into Verbs.  Rename this to make more
sense on what the PMD has to translate.

Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
Acked-by: Yongseok Koh <yskoh@mellanox.com>
---
 drivers/net/mlx5/mlx5.c      | 15 ++++-----------
 drivers/net/mlx5/mlx5.h      |  4 ++--
 drivers/net/mlx5/mlx5_flow.c | 24 ++++++++++++------------
 3 files changed, 18 insertions(+), 25 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index e9780ac8f..74248f098 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -717,7 +717,6 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
 	unsigned int tunnel_en = 0;
 	unsigned int mpls_en = 0;
 	unsigned int swp = 0;
-	unsigned int verb_priorities = 0;
 	unsigned int mprq = 0;
 	unsigned int mprq_min_stride_size_n = 0;
 	unsigned int mprq_max_stride_size_n = 0;
@@ -1139,16 +1138,10 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
 	/* Store device configuration on private structure. */
 	priv->config = config;
 	/* Supported Verbs flow priority number detection. */
-	if (verb_priorities == 0) {
-		err = mlx5_verbs_max_prio(eth_dev);
-		if (err < 0) {
-			DRV_LOG(ERR, "port %u wrong Verbs flow priorities",
-				eth_dev->data->port_id);
-			goto error;
-		}
-		verb_priorities = err;
-	}
-	priv->config.max_verbs_prio = verb_priorities;
+	err = mlx5_flow_discover_priorities(eth_dev);
+	if (err < 0)
+		goto error;
+	priv->config.flow_prio = err;
 	/*
 	 * Once the device is added to the list of memory event
 	 * callback, its global MR cache table cannot be expanded
diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 227429848..9949cd3fa 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -122,7 +122,7 @@ struct mlx5_dev_config {
 		unsigned int min_rxqs_num;
 		/* Rx queue count threshold to enable MPRQ. */
 	} mprq; /* Configurations for Multi-Packet RQ. */
-	unsigned int max_verbs_prio; /* Number of Verb flow priorities. */
+	unsigned int flow_prio; /* Number of flow priorities. */
 	unsigned int tso_max_payload_sz; /* Maximum TCP payload for TSO. */
 	unsigned int ind_table_max_size; /* Maximum indirection table size. */
 	int txq_inline; /* Maximum packet size for inlining. */
@@ -317,7 +317,7 @@ int mlx5_traffic_restart(struct rte_eth_dev *dev);
 
 /* mlx5_flow.c */
 
-int mlx5_verbs_max_prio(struct rte_eth_dev *dev);
+int mlx5_flow_discover_priorities(struct rte_eth_dev *dev);
 void mlx5_flow_print(struct rte_flow *flow);
 int mlx5_flow_validate(struct rte_eth_dev *dev,
 		       const struct rte_flow_attr *attr,
diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 5e325be37..8fdc6d7bb 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -76,17 +76,17 @@ struct ibv_spec_header {
 };
 
  /**
-  * Get the maximum number of priority available.
+  * Discover the maximum number of priority available.
   *
   * @param[in] dev
   *   Pointer to Ethernet device.
   *
   * @return
-  *   number of supported Verbs flow priority on success, a negative errno
-  *   value otherwise and rte_errno is set.
+  *   number of supported flow priority on success, a negative errno value
+  *   otherwise and rte_errno is set.
   */
 int
-mlx5_verbs_max_prio(struct rte_eth_dev *dev)
+mlx5_flow_discover_priorities(struct rte_eth_dev *dev)
 {
 	struct {
 		struct ibv_flow_attr attr;
@@ -106,25 +106,25 @@ mlx5_verbs_max_prio(struct rte_eth_dev *dev)
 		},
 	};
 	struct ibv_flow *flow;
-	uint32_t verb_priorities;
 	struct mlx5_hrxq *drop = mlx5_hrxq_drop_new(dev);
+	uint16_t vprio[] = { 8, 16 };
+	int i;
 
 	if (!drop) {
 		rte_errno = ENOTSUP;
 		return -rte_errno;
 	}
-	for (verb_priorities = 0; 1; verb_priorities++) {
-		flow_attr.attr.priority = verb_priorities;
-		flow = mlx5_glue->create_flow(drop->qp,
-					      &flow_attr.attr);
+	for (i = 0; i != RTE_DIM(vprio); i++) {
+		flow_attr.attr.priority = vprio[i] - 1;
+		flow = mlx5_glue->create_flow(drop->qp, &flow_attr.attr);
 		if (!flow)
 			break;
 		claim_zero(mlx5_glue->destroy_flow(flow));
 	}
 	mlx5_hrxq_drop_release(dev);
 	DRV_LOG(INFO, "port %u flow maximum priority: %d",
-		dev->data->port_id, verb_priorities);
-	return verb_priorities;
+		dev->data->port_id, vprio[i - 1]);
+	return vprio[i - 1];
 }
 
 /**
@@ -318,7 +318,7 @@ mlx5_ctrl_flow_vlan(struct rte_eth_dev *dev,
 	struct priv *priv = dev->data->dev_private;
 	const struct rte_flow_attr attr = {
 		.ingress = 1,
-		.priority = priv->config.max_verbs_prio - 1,
+		.priority = priv->config.flow_prio - 1,
 	};
 	struct rte_flow_item items[] = {
 		{
-- 
2.18.0