net/mlx5: Introduce bulk reading of flow counters
This commit utilize the ability of ConnectX-4 to bulk read flow counters.
Few bulk counter queries could be done instead of issuing thousands of
firmware commands per second to get statistics of all flows set to HW,
such as those programmed when we offload tc filters.
Counters are stored sorted by hardware id, and queried in blocks (id +
number of counters).
Due to hardware requirement, start of block and number of counters in a
block must be four aligned.
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Amir Vadai <amir@vadai.me>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
index a5bb6b6..9134010 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
@@ -413,3 +413,70 @@
return 0;
}
+
+struct mlx5_cmd_fc_bulk {
+ u16 id;
+ int num;
+ int outlen;
+ u32 out[0];
+};
+
+struct mlx5_cmd_fc_bulk *
+mlx5_cmd_fc_bulk_alloc(struct mlx5_core_dev *dev, u16 id, int num)
+{
+ struct mlx5_cmd_fc_bulk *b;
+ int outlen = sizeof(*b) +
+ MLX5_ST_SZ_BYTES(query_flow_counter_out) +
+ MLX5_ST_SZ_BYTES(traffic_counter) * num;
+
+ b = kzalloc(outlen, GFP_KERNEL);
+ if (!b)
+ return NULL;
+
+ b->id = id;
+ b->num = num;
+ b->outlen = outlen;
+
+ return b;
+}
+
+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)
+{
+ u32 in[MLX5_ST_SZ_DW(query_flow_counter_in)];
+
+ memset(in, 0, sizeof(in));
+
+ 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_check_status(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, u16 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);
+}