[dpdk-dev] [PATCH 2/4] net/mlx5: resize a full counter container

[Matan Azrad <matan@mellanox.com>]

When the counter countainer has no more space to store more counter
pools try to resize the container to allow more pools to be created.

So, the only limitation for the maximum counter number is the memory.

Signed-off-by: Matan Azrad <matan@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
---
 drivers/net/mlx5/mlx5_flow_dv.c | 43 +++++++++++++++++++++++------------------
 1 file changed, 24 insertions(+), 19 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 9654c3b..3b7a43e 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -2114,7 +2114,7 @@ struct field_modify_info modify_tcp[] = {
 	return 0;
 }
 
-#define MLX5_CNT_CONTAINER_SIZE 64
+#define MLX5_CNT_CONTAINER_RESIZE 64
 #define MLX5_CNT_CONTAINER(priv, batch) (&(priv)->sh->cmng.ccont[batch])
 
 /**
@@ -2230,7 +2230,7 @@ struct field_modify_info modify_tcp[] = {
 }
 
 /**
- * Prepare a counter container.
+ * Resize a counter container.
  *
  * @param[in] dev
  *   Pointer to the Ethernet device structure.
@@ -2241,26 +2241,34 @@ struct field_modify_info modify_tcp[] = {
  *   The container pointer on success, otherwise NULL and rte_errno is set.
  */
 static struct mlx5_pools_container *
-flow_dv_container_prepare(struct rte_eth_dev *dev, uint32_t batch)
+flow_dv_container_resize(struct rte_eth_dev *dev, uint32_t batch)
 {
 	struct mlx5_priv *priv = dev->data->dev_private;
 	struct mlx5_pools_container *cont = MLX5_CNT_CONTAINER(priv, batch);
 	struct mlx5_counter_stats_mem_mng *mem_mng;
-	uint32_t size = MLX5_CNT_CONTAINER_SIZE;
-	uint32_t mem_size = sizeof(struct mlx5_flow_counter_pool *) * size;
-
-	cont->pools = rte_calloc(__func__, 1, mem_size, 0);
-	if (!cont->pools) {
+	uint32_t resize = cont->n + MLX5_CNT_CONTAINER_RESIZE;
+	uint32_t mem_size = sizeof(struct mlx5_flow_counter_pool *) * resize;
+	struct mlx5_flow_counter_pool **new_pools = rte_calloc(__func__, 1,
+							       mem_size, 0);
+	if (!new_pools) {
 		rte_errno = ENOMEM;
 		return NULL;
 	}
-	mem_mng = flow_dv_create_counter_stat_mem_mng(dev, size);
+	mem_mng = flow_dv_create_counter_stat_mem_mng(dev,
+						    MLX5_CNT_CONTAINER_RESIZE);
 	if (!mem_mng) {
-		rte_free(cont->pools);
+		rte_free(new_pools);
 		return NULL;
 	}
-	cont->n = size;
-	TAILQ_INIT(&cont->pool_list);
+	if (cont->n) {
+		memcpy(new_pools, cont->pools,
+		       cont->n * sizeof(struct mlx5_flow_counter_pool *));
+		rte_free(cont->pools);
+	} else {
+		TAILQ_INIT(&cont->pool_list);
+	}
+	cont->pools = new_pools;
+	cont->n = resize;
 	cont->init_mem_mng = mem_mng;
 	return cont;
 }
@@ -2328,14 +2336,10 @@ struct field_modify_info modify_tcp[] = {
 	struct mlx5_pools_container *cont = MLX5_CNT_CONTAINER(priv, batch);
 	uint32_t size;
 
-	if (!cont->n) {
-		cont = flow_dv_container_prepare(dev, batch);
+	if (cont->n == cont->n_valid) {
+		cont = flow_dv_container_resize(dev, batch);
 		if (!cont)
 			return NULL;
-	} else if (cont->n == cont->n_valid) {
-		DRV_LOG(ERR, "No space in container to allocate a new pool\n");
-		rte_errno = ENOSPC;
-		return NULL;
 	}
 	size = sizeof(*pool) + MLX5_COUNTERS_PER_POOL *
 			sizeof(struct mlx5_flow_counter);
@@ -2345,7 +2349,8 @@ struct field_modify_info modify_tcp[] = {
 		return NULL;
 	}
 	pool->min_dcs = dcs;
-	pool->raw = cont->init_mem_mng->raws + cont->n_valid;
+	pool->raw = cont->init_mem_mng->raws + cont->n_valid  %
+			MLX5_CNT_CONTAINER_RESIZE;
 	TAILQ_INIT(&pool->counters);
 	TAILQ_INSERT_TAIL(&cont->pool_list, pool, next);
 	cont->pools[cont->n_valid] = pool;
-- 
1.8.3.1