IB/core: Expose and rename ib_find_cached_gid_by_port cache API

Sometime consumers might want to search for a GID in a specific port.
For example, when a WC arrives and we want to search the GID
that matches that port - it's better to search only the relevant
port.
Exposing and renaming ib_cache_gid_find_by_port in order to match
the naming convention of the module.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/core/cache.c

@@ -409,7 +409,7 @@ static int ib_cache_gid_find(struct ib_device *ib_dev,
 					mask, port, index);
 }
 
-int ib_cache_gid_find_by_port(struct ib_device *ib_dev,
+int ib_find_cached_gid_by_port(struct ib_device *ib_dev,
 			       const union ib_gid *gid,
 			       u8 port, struct net_device *ndev,
 			       u16 *index)
@@ -438,6 +438,7 @@ int ib_cache_gid_find_by_port(struct ib_device *ib_dev,
 
 	return -ENOENT;
 }
+EXPORT_SYMBOL(ib_find_cached_gid_by_port);
 
 static struct ib_gid_table *alloc_gid_table(int sz)
 {

drivers/infiniband/core/core_priv.h

@@ -65,11 +65,6 @@ void ib_enum_all_roce_netdevs(roce_netdev_filter filter,
 			      roce_netdev_callback cb,
 			      void *cookie);
 
-int ib_cache_gid_find_by_port(struct ib_device *ib_dev,
-			      const union ib_gid *gid,
-			      u8 port, struct net_device *ndev,
-			      u16 *index);
-
 enum ib_cache_gid_default_mode {
 	IB_CACHE_GID_DEFAULT_MODE_SET,
 	IB_CACHE_GID_DEFAULT_MODE_DELETE

drivers/infiniband/core/device.c

@@ -838,7 +838,7 @@ int ib_find_gid(struct ib_device *device, union ib_gid *gid,
 
 	for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) {
 		if (rdma_cap_roce_gid_table(device, port)) {
-			if (!ib_cache_gid_find_by_port(device, gid, port,
+			if (!ib_find_cached_gid_by_port(device, gid, port,
 							ndev, index)) {
 				*port_num = port;
 				return 0;

include/rdma/ib_cache.h

@@ -74,6 +74,25 @@ int ib_find_cached_gid(struct ib_device *device,
 		       u8               *port_num,
 		       u16              *index);
 
+/**
+ * ib_find_cached_gid_by_port - Returns the GID table index where a specified
+ * GID value occurs
+ * @device: The device to query.
+ * @gid: The GID value to search for.
+ * @port_num: The port number of the device where the GID value sould be
+ *   searched.
+ * @ndev: In RoCE, the net device of the device. Null means ignore.
+ * @index: The index into the cached GID table where the GID was found.  This
+ *   parameter may be NULL.
+ *
+ * ib_find_cached_gid() searches for the specified GID value in
+ * the local software cache.
+ */
+int ib_find_cached_gid_by_port(struct ib_device *device,
+			       const union ib_gid *gid,
+			       u8               port_num,
+			       struct net_device *ndev,
+			       u16              *index);
 /**
  * ib_get_cached_pkey - Returns a cached PKey table entry
  * @device: The device to query.