30  * GEM drivers which provide a GEM based dumb buffer with a virtual address are supported.
156  * is fbdev which cannot free the buffer if userspace has open file descriptors.
174 static void drm_client_buffer_delete(struct drm_client_buffer *buffer)  in drm_client_buffer_delete()  argument
176 	if (buffer->gem) {  in drm_client_buffer_delete()
177 		drm_gem_vunmap_unlocked(buffer->gem, &buffer->map);  in drm_client_buffer_delete()
178 		drm_gem_object_put(buffer->gem);  in drm_client_buffer_delete()
181 	kfree(buffer);  in drm_client_buffer_delete()
191 	struct drm_client_buffer *buffer;  in drm_client_buffer_create()  local
195 	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);  in drm_client_buffer_create()
196 	if (!buffer)  in drm_client_buffer_create()
199 	buffer->client = client;  in drm_client_buffer_create()
214 	buffer->pitch = dumb_args.pitch;  in drm_client_buffer_create()
215 	buffer->gem = obj;  in drm_client_buffer_create()
218 	return buffer;  in drm_client_buffer_create()
221 	drm_client_buffer_delete(buffer);  in drm_client_buffer_create()
227  * drm_client_buffer_vmap_local - Map DRM client buffer into address space
228  * @buffer: DRM client buffer
231  * This function maps a client buffer into kernel address space. If the
232  * buffer is already mapped, it returns the existing mapping's address.
234  * Client buffer mappings are not ref'counted. Each call to
246 int drm_client_buffer_vmap_local(struct drm_client_buffer *buffer,  in drm_client_buffer_vmap_local()  argument
249 	struct drm_gem_object *gem = buffer->gem;  in drm_client_buffer_vmap_local()
250 	struct iosys_map *map = &buffer->map;  in drm_client_buffer_vmap_local()
269  * drm_client_buffer_vunmap_local - Unmap DRM client buffer
270  * @buffer: DRM client buffer
272  * This function removes a client buffer's memory mapping established
274  * required by clients that manage their buffer mappings by themselves.
276 void drm_client_buffer_vunmap_local(struct drm_client_buffer *buffer)  in drm_client_buffer_vunmap_local()  argument
278 	struct drm_gem_object *gem = buffer->gem;  in drm_client_buffer_vunmap_local()
279 	struct iosys_map *map = &buffer->map;  in drm_client_buffer_vunmap_local()
287  * drm_client_buffer_vmap - Map DRM client buffer into address space
288  * @buffer: DRM client buffer
291  * This function maps a client buffer into kernel address space. If the
292  * buffer is already mapped, it returns the existing mapping's address.
294  * Client buffer mappings are not ref'counted. Each call to
296  * drm_client_buffer_vunmap(); or the client buffer should be mapped
307 drm_client_buffer_vmap(struct drm_client_buffer *buffer,  in drm_client_buffer_vmap()  argument
310 	struct drm_gem_object *gem = buffer->gem;  in drm_client_buffer_vmap()
311 	struct iosys_map *map = &buffer->map;  in drm_client_buffer_vmap()
330 	drm_gem_unpin_locked(buffer->gem);  in drm_client_buffer_vmap()
338  * drm_client_buffer_vunmap - Unmap DRM client buffer
339  * @buffer: DRM client buffer
341  * This function removes a client buffer's memory mapping. Calling this
342  * function is only required by clients that manage their buffer mappings
345 void drm_client_buffer_vunmap(struct drm_client_buffer *buffer)  in drm_client_buffer_vunmap()  argument
347 	struct drm_gem_object *gem = buffer->gem;  in drm_client_buffer_vunmap()
348 	struct iosys_map *map = &buffer->map;  in drm_client_buffer_vunmap()
357 static void drm_client_buffer_rmfb(struct drm_client_buffer *buffer)  in drm_client_buffer_rmfb()  argument
361 	if (!buffer->fb)  in drm_client_buffer_rmfb()
364 	ret = drm_mode_rmfb(buffer->client->dev, buffer->fb->base.id, buffer->client->file);  in drm_client_buffer_rmfb()
366 		drm_err(buffer->client->dev,  in drm_client_buffer_rmfb()
367 			"Error removing FB:%u (%d)\n", buffer->fb->base.id, ret);  in drm_client_buffer_rmfb()
369 	buffer->fb = NULL;  in drm_client_buffer_rmfb()
372 static int drm_client_buffer_addfb(struct drm_client_buffer *buffer,  in drm_client_buffer_addfb()  argument
376 	struct drm_client_dev *client = buffer->client;  in drm_client_buffer_addfb()
384 	fb_req.pitches[0] = buffer->pitch;  in drm_client_buffer_addfb()
390 	buffer->fb = drm_framebuffer_lookup(client->dev, buffer->client->file, fb_req.fb_id);  in drm_client_buffer_addfb()
391 	if (WARN_ON(!buffer->fb))  in drm_client_buffer_addfb()
395 	drm_framebuffer_put(buffer->fb);  in drm_client_buffer_addfb()
397 	strscpy(buffer->fb->comm, client->name, TASK_COMM_LEN);  in drm_client_buffer_addfb()
407  * @format: Buffer format
410  * &drm_framebuffer backed by a dumb buffer.
411  * Call drm_client_framebuffer_delete() to free the buffer.
414  * Pointer to a client buffer or an error pointer on failure.
419 	struct drm_client_buffer *buffer;  in drm_client_framebuffer_create()  local
423 	buffer = drm_client_buffer_create(client, width, height, format,  in drm_client_framebuffer_create()
425 	if (IS_ERR(buffer))  in drm_client_framebuffer_create()
426 		return buffer;  in drm_client_framebuffer_create()
428 	ret = drm_client_buffer_addfb(buffer, width, height, format, handle);  in drm_client_framebuffer_create()
433 	 * object as DMA-buf. The framebuffer and our buffer structure are still  in drm_client_framebuffer_create()
439 		drm_client_buffer_delete(buffer);  in drm_client_framebuffer_create()
443 	return buffer;  in drm_client_framebuffer_create()
449  * @buffer: DRM client buffer (can be NULL)
451 void drm_client_framebuffer_delete(struct drm_client_buffer *buffer)  in drm_client_framebuffer_delete()  argument
453 	if (!buffer)  in drm_client_framebuffer_delete()
456 	drm_client_buffer_rmfb(buffer);  in drm_client_framebuffer_delete()
457 	drm_client_buffer_delete(buffer);  in drm_client_framebuffer_delete()
463  * @buffer: DRM client buffer (can be NULL)
466  * This calls &drm_framebuffer_funcs->dirty (if present) to flush buffer changes
472 int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect)  in drm_client_framebuffer_flush()  argument
474 	if (!buffer || !buffer->fb || !buffer->fb->funcs->dirty)  in drm_client_framebuffer_flush()
485 		return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,  in drm_client_framebuffer_flush()
489 	return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,  in drm_client_framebuffer_flush()