IB/core: Provide rdma_ versions of the gid cache API

These versions are functionally similar but all return gid_attrs and
related information via reference instead of via copy.

The old API is preserved, implemented as wrappers around the new, until
all callers can be converted.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

include/rdma/ib_cache.h

@@ -54,6 +54,8 @@ int ib_get_cached_gid(struct ib_device    *device,
 		      int                  index,
 		      union ib_gid        *gid,
 		      struct ib_gid_attr  *attr);
+int rdma_query_gid(struct ib_device *device, u8 port_num, int index,
+		   union ib_gid *gid);
 
 int ib_find_cached_gid(struct ib_device *device,
 		       const union ib_gid *gid,
@@ -61,6 +63,10 @@ int ib_find_cached_gid(struct ib_device *device,
 		       struct net_device *ndev,
 		       u8               *port_num,
 		       u16              *index);
+const struct ib_gid_attr *rdma_find_gid(struct ib_device *device,
+					const union ib_gid *gid,
+					enum ib_gid_type gid_type,
+					struct net_device *ndev);
 
 int ib_find_cached_gid_by_port(struct ib_device *device,
 			       const union ib_gid *gid,
@@ -68,6 +74,11 @@ int ib_find_cached_gid_by_port(struct ib_device *device,
 			       u8               port_num,
 			       struct net_device *ndev,
 			       u16              *index);
+const struct ib_gid_attr *rdma_find_gid_by_port(struct ib_device *ib_dev,
+						const union ib_gid *gid,
+						enum ib_gid_type gid_type,
+						u8 port,
+						struct net_device *ndev);
 
 int ib_find_gid_by_filter(struct ib_device *device,
 			  const union ib_gid *gid,
@@ -76,6 +87,12 @@ int ib_find_gid_by_filter(struct ib_device *device,
 					 const struct ib_gid_attr *,
 					 void *),
 			  void *context, u16 *index);
+const struct ib_gid_attr *rdma_find_gid_by_filter(
+	struct ib_device *device, const union ib_gid *gid, u8 port_num,
+	bool (*filter)(const union ib_gid *gid, const struct ib_gid_attr *,
+		       void *),
+	void *context);
+
 /**
  * ib_get_cached_pkey - Returns a cached PKey table entry
  * @device: The device to query.