IB/mlx5: Add per port counters

In order to support statistics for ports, we attach
each QP to a counter set which is dedicate to this port.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/mlx5/mlx5_ib.h

@@ -591,6 +591,10 @@ struct mlx5_ib_resources {
 	struct mutex	mutex;
 };
 
+struct mlx5_ib_port {
+	u16 q_cnt_id;
+};
+
 struct mlx5_roce {
 	/* Protect mlx5_ib_get_netdev from invoking dev_hold() with a NULL
 	 * netdev pointer
@@ -629,6 +633,8 @@ struct mlx5_ib_dev {
 	/* protect resources needed as part of reset flow */
 	spinlock_t		reset_flow_resource_lock;
 	struct list_head	qp_list;
+	/* Array with num_ports elements */
+	struct mlx5_ib_port	*port;
 };
 
 static inline struct mlx5_ib_cq *to_mibcq(struct mlx5_core_cq *mcq)