43 static void dbuf_add_to_list(struct xen_drm_front_info *front_info,  in dbuf_add_to_list()  argument
47 	list_add(&dbuf->list, &front_info->dbuf_list);  in dbuf_add_to_list()
126 	struct xen_drm_front_info *front_info;  in xen_drm_front_mode_set()  local
131 	front_info = pipeline->drm_info->front_info;  in xen_drm_front_mode_set()
132 	evtchnl = &front_info->evt_pairs[pipeline->index].req;  in xen_drm_front_mode_set()
138 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_mode_set()
148 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_mode_set()
157 int xen_drm_front_dbuf_create(struct xen_drm_front_info *front_info,  in xen_drm_front_dbuf_create()  argument
169 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_create()
177 	dbuf_add_to_list(front_info, dbuf, dbuf_cookie);  in xen_drm_front_dbuf_create()
180 	buf_cfg.xb_dev = front_info->xb_dev;  in xen_drm_front_dbuf_create()
184 	buf_cfg.be_alloc = front_info->cfg.be_alloc;  in xen_drm_front_dbuf_create()
192 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_dbuf_create()
206 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_dbuf_create()
225 	dbuf_free(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_dbuf_create()
229 static int xen_drm_front_dbuf_destroy(struct xen_drm_front_info *front_info,  in xen_drm_front_dbuf_destroy()  argument
238 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_destroy()
242 	be_alloc = front_info->cfg.be_alloc;  in xen_drm_front_dbuf_destroy()
249 		dbuf_free(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_dbuf_destroy()
253 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_dbuf_destroy()
258 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_dbuf_destroy()
268 		dbuf_free(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_dbuf_destroy()
274 int xen_drm_front_fb_attach(struct xen_drm_front_info *front_info,  in xen_drm_front_fb_attach()  argument
284 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_attach()
288 	buf = dbuf_get(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_fb_attach()
296 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_fb_attach()
305 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_fb_attach()
314 int xen_drm_front_fb_detach(struct xen_drm_front_info *front_info,  in xen_drm_front_fb_detach()  argument
322 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_detach()
328 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_fb_detach()
333 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_fb_detach()
342 int xen_drm_front_page_flip(struct xen_drm_front_info *front_info,  in xen_drm_front_page_flip()  argument
350 	if (unlikely(conn_idx >= front_info->num_evt_pairs))  in xen_drm_front_page_flip()
353 	evtchnl = &front_info->evt_pairs[conn_idx].req;  in xen_drm_front_page_flip()
357 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_page_flip()
362 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_page_flip()
371 void xen_drm_front_on_frame_done(struct xen_drm_front_info *front_info,  in xen_drm_front_on_frame_done()  argument
374 	struct xen_drm_front_drm_info *drm_info = front_info->drm_info;  in xen_drm_front_on_frame_done()
376 	if (unlikely(conn_idx >= front_info->cfg.num_connectors))  in xen_drm_front_on_frame_done()
389 		xen_drm_front_dbuf_destroy(drm_info->front_info,  in xen_drm_front_gem_object_free()
393 		dbuf_free(&drm_info->front_info->dbuf_list,  in xen_drm_front_gem_object_free()
426 	ret = xen_drm_front_dbuf_create(drm_info->front_info,  in xen_drm_drv_dumb_create()
444 	xen_drm_front_dbuf_destroy(drm_info->front_info,  in xen_drm_drv_dumb_create()
457 	struct xen_drm_front_info *front_info = drm_info->front_info;  in xen_drm_drv_release()  local
464 	if (front_info->cfg.be_alloc)  in xen_drm_drv_release()
465 		xenbus_switch_state(front_info->xb_dev,  in xen_drm_drv_release()
487 static int xen_drm_drv_init(struct xen_drm_front_info *front_info)  in xen_drm_drv_init()  argument
489 	struct device *dev = &front_info->xb_dev->dev;  in xen_drm_drv_init()
505 	drm_info->front_info = front_info;  in xen_drm_drv_init()
506 	front_info->drm_info = drm_info;  in xen_drm_drv_init()
543 	front_info->drm_info = NULL;  in xen_drm_drv_init()
548 static void xen_drm_drv_fini(struct xen_drm_front_info *front_info)  in xen_drm_drv_fini()  argument
550 	struct xen_drm_front_drm_info *drm_info = front_info->drm_info;  in xen_drm_drv_fini()
568 	front_info->drm_info = NULL;  in xen_drm_drv_fini()
570 	xen_drm_front_evtchnl_free_all(front_info);  in xen_drm_drv_fini()
571 	dbuf_free_all(&front_info->dbuf_list);  in xen_drm_drv_fini()
578 	if (!front_info->cfg.be_alloc)  in xen_drm_drv_fini()
579 		xenbus_switch_state(front_info->xb_dev,  in xen_drm_drv_fini()
583 static int displback_initwait(struct xen_drm_front_info *front_info)  in displback_initwait()  argument
585 	struct xen_drm_front_cfg *cfg = &front_info->cfg;  in displback_initwait()
588 	cfg->front_info = front_info;  in displback_initwait()
589 	ret = xen_drm_front_cfg_card(front_info, cfg);  in displback_initwait()
595 	ret = xen_drm_front_evtchnl_create_all(front_info);  in displback_initwait()
599 	return xen_drm_front_evtchnl_publish_all(front_info);  in displback_initwait()
602 static int displback_connect(struct xen_drm_front_info *front_info)  in displback_connect()  argument
604 	xen_drm_front_evtchnl_set_state(front_info, EVTCHNL_STATE_CONNECTED);  in displback_connect()
605 	return xen_drm_drv_init(front_info);  in displback_connect()
608 static void displback_disconnect(struct xen_drm_front_info *front_info)  in displback_disconnect()  argument
610 	if (!front_info->drm_info)  in displback_disconnect()
614 	xenbus_switch_state(front_info->xb_dev, XenbusStateReconfiguring);  in displback_disconnect()
616 	xen_drm_drv_fini(front_info);  in displback_disconnect()
622 	struct xen_drm_front_info *front_info = dev_get_drvdata(&xb_dev->dev);  in displback_changed()  local
640 		displback_disconnect(front_info);  in displback_changed()
648 		displback_disconnect(front_info);  in displback_changed()
652 		ret = displback_initwait(front_info);  in displback_changed()
663 		ret = displback_connect(front_info);  in displback_changed()
665 			displback_disconnect(front_info);  in displback_changed()
685 		displback_disconnect(front_info);  in displback_changed()
693 	struct xen_drm_front_info *front_info;  in xen_drv_probe()  local
703 	front_info = devm_kzalloc(&xb_dev->dev,  in xen_drv_probe()
704 				  sizeof(*front_info), GFP_KERNEL);  in xen_drv_probe()
705 	if (!front_info)  in xen_drv_probe()
708 	front_info->xb_dev = xb_dev;  in xen_drv_probe()
709 	spin_lock_init(&front_info->io_lock);  in xen_drv_probe()
710 	INIT_LIST_HEAD(&front_info->dbuf_list);  in xen_drv_probe()
711 	dev_set_drvdata(&xb_dev->dev, front_info);  in xen_drv_probe()
718 	struct xen_drm_front_info *front_info = dev_get_drvdata(&dev->dev);  in xen_drv_remove()  local
734 	while ((xenbus_read_unsigned(front_info->xb_dev->otherend, "state",  in xen_drv_remove()
742 		state = xenbus_read_unsigned(front_info->xb_dev->otherend,  in xen_drv_remove()
748 	xen_drm_drv_fini(front_info);  in xen_drv_remove()