32  * GEM drivers which provide a GEM based dumb buffer with a virtual address are supported.
144  * is fbdev which cannot free the buffer if userspace has open file descriptors.
234 static void drm_client_buffer_delete(struct drm_client_buffer *buffer)  in drm_client_buffer_delete()  argument
236 	struct drm_device *dev = buffer->client->dev;  in drm_client_buffer_delete()
238 	drm_gem_vunmap(buffer->gem, &buffer->map);  in drm_client_buffer_delete()
240 	if (buffer->gem)  in drm_client_buffer_delete()
241 		drm_gem_object_put(buffer->gem);  in drm_client_buffer_delete()
243 	if (buffer->handle)  in drm_client_buffer_delete()
244 		drm_mode_destroy_dumb(dev, buffer->handle, buffer->client->file);  in drm_client_buffer_delete()
246 	kfree(buffer);  in drm_client_buffer_delete()
255 	struct drm_client_buffer *buffer;  in drm_client_buffer_create()  local
259 	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);  in drm_client_buffer_create()
260 	if (!buffer)  in drm_client_buffer_create()
263 	buffer->client = client;  in drm_client_buffer_create()
272 	buffer->handle = dumb_args.handle;  in drm_client_buffer_create()
273 	buffer->pitch = dumb_args.pitch;  in drm_client_buffer_create()
281 	buffer->gem = obj;  in drm_client_buffer_create()
283 	return buffer;  in drm_client_buffer_create()
286 	drm_client_buffer_delete(buffer);  in drm_client_buffer_create()
292  * drm_client_buffer_vmap - Map DRM client buffer into address space
293  * @buffer: DRM client buffer
296  * This function maps a client buffer into kernel address space. If the
297  * buffer is already mapped, it returns the existing mapping's address.
299  * Client buffer mappings are not ref'counted. Each call to
301  * drm_client_buffer_vunmap(); or the client buffer should be mapped
312 drm_client_buffer_vmap(struct drm_client_buffer *buffer, struct dma_buf_map *map_copy)  in drm_client_buffer_vmap()  argument
314 	struct dma_buf_map *map = &buffer->map;  in drm_client_buffer_vmap()
325 	ret = drm_gem_vmap(buffer->gem, map);  in drm_client_buffer_vmap()
336  * drm_client_buffer_vunmap - Unmap DRM client buffer
337  * @buffer: DRM client buffer
339  * This function removes a client buffer's memory mapping. Calling this
340  * function is only required by clients that manage their buffer mappings
343 void drm_client_buffer_vunmap(struct drm_client_buffer *buffer)  in drm_client_buffer_vunmap()  argument
345 	struct dma_buf_map *map = &buffer->map;  in drm_client_buffer_vunmap()
347 	drm_gem_vunmap(buffer->gem, map);  in drm_client_buffer_vunmap()
351 static void drm_client_buffer_rmfb(struct drm_client_buffer *buffer)  in drm_client_buffer_rmfb()  argument
355 	if (!buffer->fb)  in drm_client_buffer_rmfb()
358 	ret = drm_mode_rmfb(buffer->client->dev, buffer->fb->base.id, buffer->client->file);  in drm_client_buffer_rmfb()
360 		drm_err(buffer->client->dev,  in drm_client_buffer_rmfb()
361 			"Error removing FB:%u (%d)\n", buffer->fb->base.id, ret);  in drm_client_buffer_rmfb()
363 	buffer->fb = NULL;  in drm_client_buffer_rmfb()
366 static int drm_client_buffer_addfb(struct drm_client_buffer *buffer,  in drm_client_buffer_addfb()  argument
369 	struct drm_client_dev *client = buffer->client;  in drm_client_buffer_addfb()
379 	fb_req.handle = buffer->handle;  in drm_client_buffer_addfb()
380 	fb_req.pitch = buffer->pitch;  in drm_client_buffer_addfb()
386 	buffer->fb = drm_framebuffer_lookup(client->dev, buffer->client->file, fb_req.fb_id);  in drm_client_buffer_addfb()
387 	if (WARN_ON(!buffer->fb))  in drm_client_buffer_addfb()
391 	drm_framebuffer_put(buffer->fb);  in drm_client_buffer_addfb()
393 	strscpy(buffer->fb->comm, client->name, TASK_COMM_LEN);  in drm_client_buffer_addfb()
403  * @format: Buffer format
406  * &drm_framebuffer backed by a dumb buffer.
407  * Call drm_client_framebuffer_delete() to free the buffer.
410  * Pointer to a client buffer or an error pointer on failure.
415 	struct drm_client_buffer *buffer;  in drm_client_framebuffer_create()  local
418 	buffer = drm_client_buffer_create(client, width, height, format);  in drm_client_framebuffer_create()
419 	if (IS_ERR(buffer))  in drm_client_framebuffer_create()
420 		return buffer;  in drm_client_framebuffer_create()
422 	ret = drm_client_buffer_addfb(buffer, width, height, format);  in drm_client_framebuffer_create()
424 		drm_client_buffer_delete(buffer);  in drm_client_framebuffer_create()
428 	return buffer;  in drm_client_framebuffer_create()
434  * @buffer: DRM client buffer (can be NULL)
436 void drm_client_framebuffer_delete(struct drm_client_buffer *buffer)  in drm_client_framebuffer_delete()  argument
438 	if (!buffer)  in drm_client_framebuffer_delete()
441 	drm_client_buffer_rmfb(buffer);  in drm_client_framebuffer_delete()
442 	drm_client_buffer_delete(buffer);  in drm_client_framebuffer_delete()
448  * @buffer: DRM client buffer (can be NULL)
451  * This calls &drm_framebuffer_funcs->dirty (if present) to flush buffer changes
457 int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect)  in drm_client_framebuffer_flush()  argument
459 	if (!buffer || !buffer->fb || !buffer->fb->funcs->dirty)  in drm_client_framebuffer_flush()
470 		return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,  in drm_client_framebuffer_flush()
474 	return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,  in drm_client_framebuffer_flush()