IB/mlx5: Add counter_alloc_stats() and counter_update_stats() support

Add support for ib callback counter_alloc_stats() and
counter_update_stats().

Signed-off-by: Mark Zhang <markz@mellanox.com>
Reviewed-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/mlx5/main.c

@@ -5586,6 +5586,27 @@ static int mlx5_ib_get_hw_stats(struct ib_device *ibdev,
 	return num_counters;
 }
 
+static struct rdma_hw_stats *
+mlx5_ib_counter_alloc_stats(struct rdma_counter *counter)
+{
+	struct mlx5_ib_dev *dev = to_mdev(counter->device);
+	struct mlx5_ib_port *port = &dev->port[counter->port - 1];
+
+	/* Q counters are in the beginning of all counters */
+	return rdma_alloc_hw_stats_struct(port->cnts.names,
+					  port->cnts.num_q_counters,
+					  RDMA_HW_STATS_DEFAULT_LIFESPAN);
+}
+
+static int mlx5_ib_counter_update_stats(struct rdma_counter *counter)
+{
+	struct mlx5_ib_dev *dev = to_mdev(counter->device);
+	struct mlx5_ib_port *port = &dev->port[counter->port - 1];
+
+	return mlx5_ib_query_q_counters(dev->mdev, port,
+					counter->stats, counter->id);
+}
+
 static int mlx5_ib_counter_bind_qp(struct rdma_counter *counter,
 				   struct ib_qp *qp)
 {
@@ -6553,6 +6574,8 @@ static const struct ib_device_ops mlx5_ib_dev_hw_stats_ops = {
 	.counter_bind_qp = mlx5_ib_counter_bind_qp,
 	.counter_unbind_qp = mlx5_ib_counter_unbind_qp,
 	.counter_dealloc = mlx5_ib_counter_dealloc,
+	.counter_alloc_stats = mlx5_ib_counter_alloc_stats,
+	.counter_update_stats = mlx5_ib_counter_update_stats,
 };
 
 static int mlx5_ib_stage_counters_init(struct mlx5_ib_dev *dev)