[dpdk-dev] [PATCH 12/19] net/mlx5: expose flow counters management

[Suanming Mou <suanmingm@mellanox.com>]

Expose the flow counter management mechanism for other components to
use.

Signed-off-by: Suanming Mou <suanmingm@mellanox.com>
---
 drivers/net/mlx5/mlx5.h         |  4 ++
 drivers/net/mlx5/mlx5_flow.c    | 83 +++++++++++++++++++++++++++++++++++++++++
 drivers/net/mlx5/mlx5_flow.h    | 11 ++++++
 drivers/net/mlx5/mlx5_flow_dv.c | 68 +++++++++++++++++++++++++++++++++
 4 files changed, 166 insertions(+)

diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 35abb3f..2e35f00 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -957,6 +957,10 @@ void mlx5_flow_async_pool_query_handle(struct mlx5_ibv_shared *sh,
 				       uint64_t async_id, int status);
 void mlx5_set_query_alarm(struct mlx5_ibv_shared *sh);
 void mlx5_flow_query_alarm(void *arg);
+struct mlx5_flow_counter *mlx5_counter_alloc(struct rte_eth_dev *dev);
+void mlx5_counter_free(struct rte_eth_dev *dev, struct mlx5_flow_counter *cnt);
+int mlx5_counter_query(struct rte_eth_dev *dev, struct mlx5_flow_counter *cnt,
+		       bool clear, uint64_t *pkts, uint64_t *bytes);
 
 /* mlx5_mp.c */
 void mlx5_mp_req_start_rxtx(struct rte_eth_dev *dev);
diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 9824b93..88590a1 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -4959,6 +4959,89 @@ struct mlx5_meter_domains_infos *
 	return fops->destroy_policer_rules(dev, fm, attr);
 }
 
+/**
+ * Allocate a counter.
+ *
+ * @param[in] dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   Pointer to allocated counter  on success, NULL otherwise.
+ */
+struct mlx5_flow_counter *
+mlx5_counter_alloc(struct rte_eth_dev *dev)
+{
+	const struct mlx5_flow_driver_ops *fops;
+	struct rte_flow_attr attr = { .transfer = 0 };
+
+	if (flow_get_drv_type(dev, &attr) == MLX5_FLOW_TYPE_DV) {
+		fops = flow_get_drv_ops(MLX5_FLOW_TYPE_DV);
+		return fops->counter_alloc(dev);
+	}
+	DRV_LOG(ERR,
+		"port %u counter allocate is not supported.",
+		 dev->data->port_id);
+	return NULL;
+}
+
+/**
+ * Free a counter.
+ *
+ * @param[in] dev
+ *   Pointer to Ethernet device structure.
+ * @param[in] cnt
+ *   Pointer to counter to be free.
+ */
+void
+mlx5_counter_free(struct rte_eth_dev *dev, struct mlx5_flow_counter *cnt)
+{
+	const struct mlx5_flow_driver_ops *fops;
+	struct rte_flow_attr attr = { .transfer = 0 };
+
+	if (flow_get_drv_type(dev, &attr) == MLX5_FLOW_TYPE_DV) {
+		fops = flow_get_drv_ops(MLX5_FLOW_TYPE_DV);
+		fops->counter_free(dev, cnt);
+		return;
+	}
+	DRV_LOG(ERR,
+		"port %u counter free is not supported.",
+		 dev->data->port_id);
+}
+
+/**
+ * Query counter statistics.
+ *
+ * @param[in] dev
+ *   Pointer to Ethernet device structure.
+ * @param[in] cnt
+ *   Pointer to counter to query.
+ * @param[in] clear
+ *   Set to clear counter statistics.
+ * @param[out] pkts
+ *   The counter hits packets number to save.
+ * @param[out] bytes
+ *   The counter hits bytes number to save.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise.
+ */
+int
+mlx5_counter_query(struct rte_eth_dev *dev, struct mlx5_flow_counter *cnt,
+		   bool clear, uint64_t *pkts, uint64_t *bytes)
+{
+	const struct mlx5_flow_driver_ops *fops;
+	struct rte_flow_attr attr = { .transfer = 0 };
+
+	if (flow_get_drv_type(dev, &attr) == MLX5_FLOW_TYPE_DV) {
+		fops = flow_get_drv_ops(MLX5_FLOW_TYPE_DV);
+		return fops->counter_query(dev, cnt, clear, pkts, bytes);
+	}
+	DRV_LOG(ERR,
+		"port %u counter query is not supported.",
+		 dev->data->port_id);
+	return -ENOTSUP;
+}
+
 #define MLX5_POOL_QUERY_FREQ_US 1000000
 
 /**
diff --git a/drivers/net/mlx5/mlx5_flow.h b/drivers/net/mlx5/mlx5_flow.h
index c613019..0004227 100644
--- a/drivers/net/mlx5/mlx5_flow.h
+++ b/drivers/net/mlx5/mlx5_flow.h
@@ -664,6 +664,14 @@ typedef int (*mlx5_flow_destroy_policer_rules_t)
 					(struct rte_eth_dev *dev,
 					 const struct mlx5_flow_meter *fm,
 					 const struct rte_flow_attr *attr);
+typedef struct mlx5_flow_counter * (*mlx5_flow_counter_alloc_t)
+				   (struct rte_eth_dev *dev);
+typedef void (*mlx5_flow_counter_free_t)(struct rte_eth_dev *dev,
+					 struct mlx5_flow_counter *cnt);
+typedef int (*mlx5_flow_counter_query_t)(struct rte_eth_dev *dev,
+					 struct mlx5_flow_counter *cnt,
+					 bool clear, uint64_t *pkts,
+					 uint64_t *bytes);
 struct mlx5_flow_driver_ops {
 	mlx5_flow_validate_t validate;
 	mlx5_flow_prepare_t prepare;
@@ -676,6 +684,9 @@ struct mlx5_flow_driver_ops {
 	mlx5_flow_destroy_mtr_tbls_t destroy_mtr_tbls;
 	mlx5_flow_create_policer_rules_t create_policer_rules;
 	mlx5_flow_destroy_policer_rules_t destroy_policer_rules;
+	mlx5_flow_counter_alloc_t counter_alloc;
+	mlx5_flow_counter_free_t counter_free;
+	mlx5_flow_counter_query_t counter_query;
 };
 
 
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index d6e4e45..2e92878 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -7956,6 +7956,46 @@ struct field_modify_info modify_tcp[] = {
 	return -1;
 }
 
+/**
+ * Query a devx counter.
+ *
+ * @param[in] dev
+ *   Pointer to the Ethernet device structure.
+ * @param[in] cnt
+ *   Pointer to the flow counter.
+ * @param[in] clear
+ *   Set to clear the counter statistics.
+ * @param[out] pkts
+ *   The statistics value of packets.
+ * @param[out] bytes
+ *   The statistics value of bytes.
+ *
+ * @return
+ *   0 on success, otherwise return -1.
+ */
+static int
+flow_dv_counter_query(struct rte_eth_dev *dev,
+		      struct mlx5_flow_counter *cnt, bool clear,
+		      uint64_t *pkts, uint64_t *bytes)
+{
+	struct mlx5_priv *priv = dev->data->dev_private;
+	uint64_t inn_pkts, inn_bytes;
+	int ret;
+
+	if (!priv->config.devx)
+		return -1;
+	ret = _flow_dv_query_count(dev, cnt, &inn_pkts, &inn_bytes);
+	if (ret)
+		return -1;
+	*pkts = inn_pkts - cnt->hits;
+	*bytes = inn_bytes - cnt->bytes;
+	if (clear) {
+		cnt->hits = inn_pkts;
+		cnt->bytes = inn_bytes;
+	}
+	return 0;
+}
+
 /*
  * Mutex-protected thunk to lock-free  __flow_dv_translate().
  */
@@ -8013,6 +8053,31 @@ struct field_modify_info modify_tcp[] = {
 	flow_dv_shared_unlock(dev);
 }
 
+/*
+ * Mutex-protected thunk to lock-free flow_dv_counter_alloc().
+ */
+static struct mlx5_flow_counter *
+flow_dv_counter_allocate(struct rte_eth_dev *dev)
+{
+	struct mlx5_flow_counter *cnt;
+
+	flow_dv_shared_lock(dev);
+	cnt = flow_dv_counter_alloc(dev, 0, 0, 1);
+	flow_dv_shared_unlock(dev);
+	return cnt;
+}
+
+/*
+ * Mutex-protected thunk to lock-free flow_dv_counter_release().
+ */
+static void
+flow_dv_counter_free(struct rte_eth_dev *dev, struct mlx5_flow_counter *cnt)
+{
+	flow_dv_shared_lock(dev);
+	flow_dv_counter_release(dev, cnt);
+	flow_dv_shared_unlock(dev);
+}
+
 const struct mlx5_flow_driver_ops mlx5_flow_dv_drv_ops = {
 	.validate = flow_dv_validate,
 	.prepare = flow_dv_prepare,
@@ -8025,6 +8090,9 @@ struct field_modify_info modify_tcp[] = {
 	.destroy_mtr_tbls = flow_dv_destroy_mtr_tbl,
 	.create_policer_rules = flow_dv_create_policer_rules,
 	.destroy_policer_rules = flow_dv_destroy_policer_rules,
+	.counter_alloc = flow_dv_counter_allocate,
+	.counter_free = flow_dv_counter_free,
+	.counter_query = flow_dv_counter_query,
 };
 
 #endif /* HAVE_IBV_FLOW_DV_SUPPORT */
-- 
1.8.3.1