RDMA: Introduce and use rdma_device_to_ibdev()

[linux.git] / include / rdma / ib_verbs.h

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 1d1902fd9f8773ff164b92da230ab576658158c1..94b6e1dd4dab70fea70e4a2482bc17fb3b2c4c0a 100644 (file)
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -4241,4 +4241,27 @@ rdma_set_device_sysfs_group(struct ib_device *dev,
        dev->groups[1] = group;
 }
 
+/**
+ * rdma_device_to_ibdev - Get ib_device pointer from device pointer
+ *
+ * @device:    device pointer for which ib_device pointer to retrieve
+ *
+ * rdma_device_to_ibdev() retrieves ib_device pointer from device.
+ *
+ */
+static inline struct ib_device *rdma_device_to_ibdev(struct device *device)
+{
+       return container_of(device, struct ib_device, dev);
+}
+
+/**
+ * rdma_device_to_drv_device - Helper macro to reach back to driver's
+ *                            ib_device holder structure from device pointer.
+ *
+ * NOTE: New drivers should not make use of this API; This API is only for
+ * existing drivers who have exposed sysfs entries using
+ * rdma_set_device_sysfs_group().
+ */
+#define rdma_device_to_drv_device(dev, drv_dev_struct, ibdev_member)           \
+       container_of(rdma_device_to_ibdev(dev), drv_dev_struct, ibdev_member)
 #endif /* IB_VERBS_H */