net/mlx5: Refactor and optimize flow counter bulk query

Towards introducing the ability to allocate bulks of flow counters,
refactor the flow counter bulk query process, removing functions and
structs whose names indicated being used for flow counter bulk
allocation FW commands, despite them actually only being used to
support bulk querying, and migrate their functionality to correctly
named functions in their natural location, fs_counters.c.

Additionally, optimize the bulk query process by:
 * Extracting the memory used for the query to mlx5_fc_stats so
   that it is only allocated once, and not for each bulk query.
 * Querying all the counters in one function call.

Signed-off-by: Gavi Teitz <gavi@mellanox.com>
Reviewed-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

1 files changed, 9 insertions, 52 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
index 7ac1249eadc3..51f6972f4c70 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
@@ -615,67 +615,24 @@ int mlx5_cmd_fc_query(struct mlx5_core_dev *dev, u32 id,
 	return 0;
 }
 
-struct mlx5_cmd_fc_bulk {
-	u32 id;
-	int num;
-	int outlen;
-	u32 out[0];
-};
-
-struct mlx5_cmd_fc_bulk *
-mlx5_cmd_fc_bulk_alloc(struct mlx5_core_dev *dev, u32 id, int num)
+int mlx5_cmd_fc_get_bulk_query_out_len(int bulk_len)
 {
-	struct mlx5_cmd_fc_bulk *b;
-	int outlen =
-		MLX5_ST_SZ_BYTES(query_flow_counter_out) +
-		MLX5_ST_SZ_BYTES(traffic_counter) * num;
-
-	b = kzalloc(sizeof(*b) + outlen, GFP_KERNEL);
-	if (!b)
-		return NULL;
-
-	b->id = id;
-	b->num = num;
-	b->outlen = outlen;
-
-	return b;
+	return MLX5_ST_SZ_BYTES(query_flow_counter_out) +
+		MLX5_ST_SZ_BYTES(traffic_counter) * bulk_len;
 }
 
-void mlx5_cmd_fc_bulk_free(struct mlx5_cmd_fc_bulk *b)
-{
-	kfree(b);
-}
-
-int
-mlx5_cmd_fc_bulk_query(struct mlx5_core_dev *dev, struct mlx5_cmd_fc_bulk *b)
+int mlx5_cmd_fc_bulk_query(struct mlx5_core_dev *dev, u32 base_id, int bulk_len,
+			   u32 *out)
 {
+	int outlen = mlx5_cmd_fc_get_bulk_query_out_len(bulk_len);
 	u32 in[MLX5_ST_SZ_DW(query_flow_counter_in)] = {0};
 
 	MLX5_SET(query_flow_counter_in, in, opcode,
 		 MLX5_CMD_OP_QUERY_FLOW_COUNTER);
 	MLX5_SET(query_flow_counter_in, in, op_mod, 0);
-	MLX5_SET(query_flow_counter_in, in, flow_counter_id, b->id);
-	MLX5_SET(query_flow_counter_in, in, num_of_counters, b->num);
-	return mlx5_cmd_exec(dev, in, sizeof(in), b->out, b->outlen);
-}
-
-void mlx5_cmd_fc_bulk_get(struct mlx5_core_dev *dev,
-			  struct mlx5_cmd_fc_bulk *b, u32 id,
-			  u64 *packets, u64 *bytes)
-{
-	int index = id - b->id;
-	void *stats;
-
-	if (index < 0 || index >= b->num) {
-		mlx5_core_warn(dev, "Flow counter id (0x%x) out of range (0x%x..0x%x). Counter ignored.\n",
-			       id, b->id, b->id + b->num - 1);
-		return;
-	}
-
-	stats = MLX5_ADDR_OF(query_flow_counter_out, b->out,
-			     flow_statistics[index]);
-	*packets = MLX5_GET64(traffic_counter, stats, packets);
-	*bytes = MLX5_GET64(traffic_counter, stats, octets);
+	MLX5_SET(query_flow_counter_in, in, flow_counter_id, base_id);
+	MLX5_SET(query_flow_counter_in, in, num_of_counters, bulk_len);
+	return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen);
 }
 
 int mlx5_packet_reformat_alloc(struct mlx5_core_dev *dev,