RDMA/counter: Add "auto" configuration mode support

In auto mode all QPs belong to one category are bind automatically to a
single counter set. Currently only "qp type" is supported.

In this mode the qp counter is set in RST2INIT modification, and when a qp
is destroyed the counter is unbound.

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>

include/rdma/rdma_counter.h

@@ -7,11 +7,14 @@
 #define _RDMA_COUNTER_H_
 
 #include <linux/mutex.h>
+#include <linux/pid_namespace.h>
 
 #include <rdma/ib_verbs.h>
 #include <rdma/restrack.h>
 #include <rdma/rdma_netlink.h>
 
+struct ib_qp;
+
 struct auto_mode_param {
 	int qp_type;
 };
@@ -31,6 +34,9 @@ struct rdma_counter {
 	struct rdma_restrack_entry	res;
 	struct ib_device		*device;
 	uint32_t			id;
+	struct kref			kref;
+	struct rdma_counter_mode	mode;
+	struct mutex			lock;
 	u8				port;
 };
 
@@ -38,5 +44,7 @@ void rdma_counter_init(struct ib_device *dev);
 void rdma_counter_release(struct ib_device *dev);
 int rdma_counter_set_auto_mode(struct ib_device *dev, u8 port,
 			       bool on, enum rdma_nl_counter_mask mask);
+int rdma_counter_bind_qp_auto(struct ib_qp *qp, u8 port);
+int rdma_counter_unbind_qp(struct ib_qp *qp, bool force);
 
 #endif /* _RDMA_COUNTER_H_ */