#ifndef UVERBS_H
#define UVERBS_H
-/* Include device.h and fs.h until cdev.h is self-sufficient */
-#include <linux/fs.h>
-#include <linux/device.h>
-#include <linux/cdev.h>
#include <linux/kref.h>
#include <linux/idr.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_user_verbs.h>
+/*
+ * Our lifetime rules for these structs are the following:
+ *
+ * struct ib_uverbs_device: One reference is held by the module and
+ * released in ib_uverbs_remove_one(). Another reference is taken by
+ * ib_uverbs_open() each time the character special file is opened,
+ * and released in ib_uverbs_release_file() when the file is released.
+ *
+ * struct ib_uverbs_file: One reference is held by the VFS and
+ * released when the file is closed. Another reference is taken when
+ * an asynchronous event queue file is created and released when the
+ * event file is closed.
+ *
+ * struct ib_uverbs_event_file: One reference is held by the VFS and
+ * released when the file is closed. For asynchronous event files,
+ * another reference is held by the corresponding main context file
+ * and released when that file is closed. For completion event files,
+ * a reference is taken when a CQ is created that uses the file, and
+ * released when the CQ is destroyed.
+ */
+
struct ib_uverbs_device {
+ struct kref ref;
int devnum;
- struct cdev dev;
- struct class_device class_dev;
+ struct cdev *dev;
+ struct class_device *class_dev;
struct ib_device *ib_dev;
int num_comp_vectors;
};
struct ib_ucq_object {
struct ib_uobject uobject;
+ struct ib_uverbs_file *uverbs_file;
struct list_head comp_list;
struct list_head async_list;
u32 comp_events_reported;
void ib_uverbs_release_event_file(struct kref *ref);
struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd);
+void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
+ struct ib_uverbs_event_file *ev_file,
+ struct ib_ucq_object *uobj);
+void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
+ struct ib_uevent_object *uobj);
+
void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);