31  * GEM drivers which provide a GEM based dumb buffer with a virtual address are supported.
143  * is fbdev which cannot free the buffer if userspace has open file descriptors.
233 static void drm_client_buffer_delete(struct drm_client_buffer *buffer)  in drm_client_buffer_delete()  argument
235 	struct drm_device *dev = buffer->client->dev;  in drm_client_buffer_delete()
237 	drm_gem_vunmap(buffer->gem, buffer->vaddr);  in drm_client_buffer_delete()
239 	if (buffer->gem)  in drm_client_buffer_delete()
240 		drm_gem_object_put(buffer->gem);  in drm_client_buffer_delete()
242 	if (buffer->handle)  in drm_client_buffer_delete()
243 		drm_mode_destroy_dumb(dev, buffer->handle, buffer->client->file);  in drm_client_buffer_delete()
245 	kfree(buffer);  in drm_client_buffer_delete()
254 	struct drm_client_buffer *buffer;  in drm_client_buffer_create()  local
258 	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);  in drm_client_buffer_create()
259 	if (!buffer)  in drm_client_buffer_create()
262 	buffer->client = client;  in drm_client_buffer_create()
271 	buffer->handle = dumb_args.handle;  in drm_client_buffer_create()
272 	buffer->pitch = dumb_args.pitch;  in drm_client_buffer_create()
280 	buffer->gem = obj;  in drm_client_buffer_create()
282 	return buffer;  in drm_client_buffer_create()
285 	drm_client_buffer_delete(buffer);  in drm_client_buffer_create()
291  * drm_client_buffer_vmap - Map DRM client buffer into address space
292  * @buffer: DRM client buffer
294  * This function maps a client buffer into kernel address space. If the
295  * buffer is already mapped, it returns the mapping's address.
297  * Client buffer mappings are not ref'counted. Each call to
299  * drm_client_buffer_vunmap(); or the client buffer should be mapped
305 void *drm_client_buffer_vmap(struct drm_client_buffer *buffer)  in drm_client_buffer_vmap()  argument
309 	if (buffer->vaddr)  in drm_client_buffer_vmap()
310 		return buffer->vaddr;  in drm_client_buffer_vmap()
320 	vaddr = drm_gem_vmap(buffer->gem);  in drm_client_buffer_vmap()
324 	buffer->vaddr = vaddr;  in drm_client_buffer_vmap()
331  * drm_client_buffer_vunmap - Unmap DRM client buffer
332  * @buffer: DRM client buffer
334  * This function removes a client buffer's memory mapping. Calling this
335  * function is only required by clients that manage their buffer mappings
338 void drm_client_buffer_vunmap(struct drm_client_buffer *buffer)  in drm_client_buffer_vunmap()  argument
340 	drm_gem_vunmap(buffer->gem, buffer->vaddr);  in drm_client_buffer_vunmap()
341 	buffer->vaddr = NULL;  in drm_client_buffer_vunmap()
345 static void drm_client_buffer_rmfb(struct drm_client_buffer *buffer)  in drm_client_buffer_rmfb()  argument
349 	if (!buffer->fb)  in drm_client_buffer_rmfb()
352 	ret = drm_mode_rmfb(buffer->client->dev, buffer->fb->base.id, buffer->client->file);  in drm_client_buffer_rmfb()
354 		drm_err(buffer->client->dev,  in drm_client_buffer_rmfb()
355 			"Error removing FB:%u (%d)\n", buffer->fb->base.id, ret);  in drm_client_buffer_rmfb()
357 	buffer->fb = NULL;  in drm_client_buffer_rmfb()
360 static int drm_client_buffer_addfb(struct drm_client_buffer *buffer,  in drm_client_buffer_addfb()  argument
363 	struct drm_client_dev *client = buffer->client;  in drm_client_buffer_addfb()
373 	fb_req.handle = buffer->handle;  in drm_client_buffer_addfb()
374 	fb_req.pitch = buffer->pitch;  in drm_client_buffer_addfb()
380 	buffer->fb = drm_framebuffer_lookup(client->dev, buffer->client->file, fb_req.fb_id);  in drm_client_buffer_addfb()
381 	if (WARN_ON(!buffer->fb))  in drm_client_buffer_addfb()
385 	drm_framebuffer_put(buffer->fb);  in drm_client_buffer_addfb()
387 	strscpy(buffer->fb->comm, client->name, TASK_COMM_LEN);  in drm_client_buffer_addfb()
397  * @format: Buffer format
400  * &drm_framebuffer backed by a dumb buffer.
401  * Call drm_client_framebuffer_delete() to free the buffer.
404  * Pointer to a client buffer or an error pointer on failure.
409 	struct drm_client_buffer *buffer;  in drm_client_framebuffer_create()  local
412 	buffer = drm_client_buffer_create(client, width, height, format);  in drm_client_framebuffer_create()
413 	if (IS_ERR(buffer))  in drm_client_framebuffer_create()
414 		return buffer;  in drm_client_framebuffer_create()
416 	ret = drm_client_buffer_addfb(buffer, width, height, format);  in drm_client_framebuffer_create()
418 		drm_client_buffer_delete(buffer);  in drm_client_framebuffer_create()
422 	return buffer;  in drm_client_framebuffer_create()
428  * @buffer: DRM client buffer (can be NULL)
430 void drm_client_framebuffer_delete(struct drm_client_buffer *buffer)  in drm_client_framebuffer_delete()  argument
432 	if (!buffer)  in drm_client_framebuffer_delete()
435 	drm_client_buffer_rmfb(buffer);  in drm_client_framebuffer_delete()
436 	drm_client_buffer_delete(buffer);  in drm_client_framebuffer_delete()
442  * @buffer: DRM client buffer (can be NULL)
445  * This calls &drm_framebuffer_funcs->dirty (if present) to flush buffer changes
451 int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect)  in drm_client_framebuffer_flush()  argument
453 	if (!buffer || !buffer->fb || !buffer->fb->funcs->dirty)  in drm_client_framebuffer_flush()
464 		return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,  in drm_client_framebuffer_flush()
468 	return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,  in drm_client_framebuffer_flush()