36 #include <linux/file.h>
87  * DOC: file operations
89  * Drivers must define the file operations structure that forms the DRM
102  * userspace through the file descriptor. They are used to send vblank event and
114  * No other file operations are supported by the DRM userspace API. Overall the
140  * drm_file_alloc - allocate file context
143  * This allocates a new DRM file context. It is not linked into any context and
154 	struct drm_file *file;  in drm_file_alloc()  local
157 	file = kzalloc(sizeof(*file), GFP_KERNEL);  in drm_file_alloc()
158 	if (!file)  in drm_file_alloc()
162 	file->client_id = atomic64_inc_return(&ident);  in drm_file_alloc()
163 	file->pid = get_pid(task_tgid(current));  in drm_file_alloc()
164 	file->minor = minor;  in drm_file_alloc()
167 	file->authenticated = capable(CAP_SYS_ADMIN);  in drm_file_alloc()
169 	INIT_LIST_HEAD(&file->lhead);  in drm_file_alloc()
170 	INIT_LIST_HEAD(&file->fbs);  in drm_file_alloc()
171 	mutex_init(&file->fbs_lock);  in drm_file_alloc()
172 	INIT_LIST_HEAD(&file->blobs);  in drm_file_alloc()
173 	INIT_LIST_HEAD(&file->pending_event_list);  in drm_file_alloc()
174 	INIT_LIST_HEAD(&file->event_list);  in drm_file_alloc()
175 	init_waitqueue_head(&file->event_wait);  in drm_file_alloc()
176 	file->event_space = 4096; /* set aside 4k for event buffer */  in drm_file_alloc()
178 	spin_lock_init(&file->master_lookup_lock);  in drm_file_alloc()
179 	mutex_init(&file->event_read_lock);  in drm_file_alloc()
182 		drm_gem_open(dev, file);  in drm_file_alloc()
185 		drm_syncobj_open(file);  in drm_file_alloc()
187 	drm_prime_init_file_private(&file->prime);  in drm_file_alloc()
190 		ret = dev->driver->open(dev, file);  in drm_file_alloc()
195 	return file;  in drm_file_alloc()
198 	drm_prime_destroy_file_private(&file->prime);  in drm_file_alloc()
200 		drm_syncobj_release(file);  in drm_file_alloc()
202 		drm_gem_release(dev, file);  in drm_file_alloc()
203 	put_pid(file->pid);  in drm_file_alloc()
204 	kfree(file);  in drm_file_alloc()
234  * drm_file_free - free file context
235  * @file: context to free, or NULL
237  * This destroys and deallocates a DRM file context previously allocated via
243 void drm_file_free(struct drm_file *file)  in drm_file_free()  argument
247 	if (!file)  in drm_file_free()
250 	dev = file->minor->dev;  in drm_file_free()
254 		     (long)old_encode_dev(file->minor->kdev->devt),  in drm_file_free()
260 		dev->driver->preclose(dev, file);  in drm_file_free()
264 		drm_legacy_lock_release(dev, file->filp);  in drm_file_free()
267 		drm_legacy_reclaim_buffers(dev, file);  in drm_file_free()
269 	drm_events_release(file);  in drm_file_free()
272 		drm_fb_release(file);  in drm_file_free()
273 		drm_property_destroy_user_blobs(dev, file);  in drm_file_free()
277 		drm_syncobj_release(file);  in drm_file_free()
280 		drm_gem_release(dev, file);  in drm_file_free()
282 	drm_legacy_ctxbitmap_flush(dev, file);  in drm_file_free()
284 	if (drm_is_primary_client(file))  in drm_file_free()
285 		drm_master_release(file);  in drm_file_free()
288 		dev->driver->postclose(dev, file);  in drm_file_free()
290 	drm_prime_destroy_file_private(&file->prime);  in drm_file_free()
292 	WARN_ON(!list_empty(&file->event_list));  in drm_file_free()
294 	put_pid(file->pid);  in drm_file_free()
295 	kfree(file);  in drm_file_free()
298 static void drm_close_helper(struct file *filp)  in drm_close_helper()
326  * \param filp file pointer.
330  * Creates and initializes a drm_file structure for the file private data in \p
333 int drm_open_helper(struct file *filp, struct drm_minor *minor)  in drm_open_helper()
397  * drm_open - open method for DRM file
399  * @filp: file pointer.
402  * It looks up the correct DRM device and instantiates all the per-file
409 int drm_open(struct inode *inode, struct file *filp)  in drm_open()
470  * drm_release - release method for DRM file
472  * @filp: file pointer.
475  * method. It frees any resources associated with the open file, and calls the
476  * &drm_driver.postclose driver callback. If this is the last open file for the
483 int drm_release(struct inode *inode, struct file *filp)  in drm_release()
509  * drm_release_noglobal - release method for DRM file
511  * @filp: file pointer.
514  * method. It frees any resources associated with the open file prior to taking
516  * callback. If this is the last open file for the DRM device also proceeds to
523 int drm_release_noglobal(struct inode *inode, struct file *filp)  in drm_release_noglobal()
543  * drm_read - read method for DRM file
544  * @filp: file pointer
567 ssize_t drm_read(struct file *filp, char __user *buffer,  in drm_read()
637  * drm_poll - poll method for DRM file
638  * @filp: file pointer
650  * Mask of POLL flags indicating the current status of the file.
652 __poll_t drm_poll(struct file *filp, struct poll_table_struct *wait)  in drm_poll()
669  * @file_priv: DRM file private data
711  * @file_priv: DRM file private data
808  * drm_send_event_timestamp_locked - send DRM event to file descriptor
815  * to its associated userspace DRM file. Callers must already hold
819  * corresponding DRM file is closed. Drivers need not worry about whether the
820  * DRM file for this event still exists and can call this function upon
831  * drm_send_event_locked - send DRM event to file descriptor
836  * to its associated userspace DRM file. Callers must already hold
840  * corresponding DRM file is closed. Drivers need not worry about whether the
841  * DRM file for this event still exists and can call this function upon
851  * drm_send_event - send DRM event to file descriptor
856  * to its associated userspace DRM file. This function acquires
861  * corresponding DRM file is closed. Drivers need not worry about whether the
862  * DRM file for this event still exists and can call this function upon
918  * @file: the DRM file
921  * file.
923 void drm_show_memory_stats(struct drm_printer *p, struct drm_file *file)  in drm_show_memory_stats()  argument
930 	spin_lock(&file->table_lock);  in drm_show_memory_stats()
931 	idr_for_each_entry (&file->object_idr, obj, id) {  in drm_show_memory_stats()
965 	spin_unlock(&file->table_lock);  in drm_show_memory_stats()
972  * drm_show_fdinfo - helper for drm file fops
974  * @f: the device file instance
981 void drm_show_fdinfo(struct seq_file *m, struct file *f)  in drm_show_fdinfo()
983 	struct drm_file *file = f->private_data;  in drm_show_fdinfo()  local
984 	struct drm_device *dev = file->minor->dev;  in drm_show_fdinfo()
988 	drm_printf(&p, "drm-client-id:\t%llu\n", file->client_id);  in drm_show_fdinfo()
999 		dev->driver->show_fdinfo(&p, file);  in drm_show_fdinfo()
1004  * mock_drm_getfile - Create a new struct file for the drm device
1006  * @flags: file creation mode (O_RDWR etc)
1008  * This create a new struct file that wraps a DRM file context around a
1010  * invoking userspace. The struct file may be operated on using its f_op
1015  * Pointer to newly created struct file, ERR_PTR on failure.
1017 struct file *mock_drm_getfile(struct drm_minor *minor, unsigned int flags)  in mock_drm_getfile()
1021 	struct file *file;  in mock_drm_getfile()  local
1027 	file = anon_inode_getfile("drm", dev->driver->fops, priv, flags);  in mock_drm_getfile()
1028 	if (IS_ERR(file)) {  in mock_drm_getfile()
1030 		return file;  in mock_drm_getfile()
1034 	file->f_mapping = dev->anon_inode->i_mapping;  in mock_drm_getfile()
1037 	priv->filp = file;  in mock_drm_getfile()
1039 	return file;  in mock_drm_getfile()