38 static int dbuf_add_to_list(struct xen_drm_front_info *front_info,  in dbuf_add_to_list()  argument
49 	list_add(&dbuf->list, &front_info->dbuf_list);  in dbuf_add_to_list()
138 	struct xen_drm_front_info *front_info;  in xen_drm_front_mode_set()  local
143 	front_info = pipeline->drm_info->front_info;  in xen_drm_front_mode_set()
144 	evtchnl = &front_info->evt_pairs[pipeline->index].req;  in xen_drm_front_mode_set()
150 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_mode_set()
160 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_mode_set()
169 int xen_drm_front_dbuf_create(struct xen_drm_front_info *front_info,  in xen_drm_front_dbuf_create()  argument
180 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_create()
185 	buf_cfg.xb_dev = front_info->xb_dev;  in xen_drm_front_dbuf_create()
188 	buf_cfg.be_alloc = front_info->cfg.be_alloc;  in xen_drm_front_dbuf_create()
194 	ret = dbuf_add_to_list(front_info, shbuf, dbuf_cookie);  in xen_drm_front_dbuf_create()
202 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_dbuf_create()
215 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_dbuf_create()
233 	dbuf_free(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_dbuf_create()
237 static int xen_drm_front_dbuf_destroy(struct xen_drm_front_info *front_info,  in xen_drm_front_dbuf_destroy()  argument
246 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_destroy()
250 	be_alloc = front_info->cfg.be_alloc;  in xen_drm_front_dbuf_destroy()
257 		dbuf_free(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_dbuf_destroy()
261 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_dbuf_destroy()
266 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_dbuf_destroy()
276 		dbuf_free(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_dbuf_destroy()
282 int xen_drm_front_fb_attach(struct xen_drm_front_info *front_info,  in xen_drm_front_fb_attach()  argument
292 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_attach()
296 	buf = dbuf_get(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_fb_attach()
304 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_fb_attach()
313 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_fb_attach()
322 int xen_drm_front_fb_detach(struct xen_drm_front_info *front_info,  in xen_drm_front_fb_detach()  argument
330 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_detach()
336 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_fb_detach()
341 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_fb_detach()
350 int xen_drm_front_page_flip(struct xen_drm_front_info *front_info,  in xen_drm_front_page_flip()  argument
358 	if (unlikely(conn_idx >= front_info->num_evt_pairs))  in xen_drm_front_page_flip()
361 	dbuf_flush_fb(&front_info->dbuf_list, fb_cookie);  in xen_drm_front_page_flip()
362 	evtchnl = &front_info->evt_pairs[conn_idx].req;  in xen_drm_front_page_flip()
366 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_page_flip()
371 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_page_flip()
380 void xen_drm_front_on_frame_done(struct xen_drm_front_info *front_info,  in xen_drm_front_on_frame_done()  argument
383 	struct xen_drm_front_drm_info *drm_info = front_info->drm_info;  in xen_drm_front_on_frame_done()
385 	if (unlikely(conn_idx >= front_info->cfg.num_connectors))  in xen_drm_front_on_frame_done()
418 	ret = xen_drm_front_dbuf_create(drm_info->front_info,  in xen_drm_drv_dumb_create()
436 	xen_drm_front_dbuf_destroy(drm_info->front_info,  in xen_drm_drv_dumb_create()
452 		xen_drm_front_dbuf_destroy(drm_info->front_info,  in xen_drm_drv_free_object_unlocked()
456 		dbuf_free(&drm_info->front_info->dbuf_list,  in xen_drm_drv_free_object_unlocked()
466 	struct xen_drm_front_info *front_info = drm_info->front_info;  in xen_drm_drv_release()  local
476 	if (front_info->cfg.be_alloc)  in xen_drm_drv_release()
477 		xenbus_switch_state(front_info->xb_dev,  in xen_drm_drv_release()
527 static int xen_drm_drv_init(struct xen_drm_front_info *front_info)  in xen_drm_drv_init()  argument
529 	struct device *dev = &front_info->xb_dev->dev;  in xen_drm_drv_init()
542 	drm_info->front_info = front_info;  in xen_drm_drv_init()
543 	front_info->drm_info = drm_info;  in xen_drm_drv_init()
582 static void xen_drm_drv_fini(struct xen_drm_front_info *front_info)  in xen_drm_drv_fini()  argument
584 	struct xen_drm_front_drm_info *drm_info = front_info->drm_info;  in xen_drm_drv_fini()
601 	front_info->drm_info = NULL;  in xen_drm_drv_fini()
603 	xen_drm_front_evtchnl_free_all(front_info);  in xen_drm_drv_fini()
604 	dbuf_free_all(&front_info->dbuf_list);  in xen_drm_drv_fini()
611 	if (!front_info->cfg.be_alloc)  in xen_drm_drv_fini()
612 		xenbus_switch_state(front_info->xb_dev,  in xen_drm_drv_fini()
616 static int displback_initwait(struct xen_drm_front_info *front_info)  in displback_initwait()  argument
618 	struct xen_drm_front_cfg *cfg = &front_info->cfg;  in displback_initwait()
621 	cfg->front_info = front_info;  in displback_initwait()
622 	ret = xen_drm_front_cfg_card(front_info, cfg);  in displback_initwait()
628 	ret = xen_drm_front_evtchnl_create_all(front_info);  in displback_initwait()
632 	return xen_drm_front_evtchnl_publish_all(front_info);  in displback_initwait()
635 static int displback_connect(struct xen_drm_front_info *front_info)  in displback_connect()  argument
637 	xen_drm_front_evtchnl_set_state(front_info, EVTCHNL_STATE_CONNECTED);  in displback_connect()
638 	return xen_drm_drv_init(front_info);  in displback_connect()
641 static void displback_disconnect(struct xen_drm_front_info *front_info)  in displback_disconnect()  argument
643 	if (!front_info->drm_info)  in displback_disconnect()
647 	xenbus_switch_state(front_info->xb_dev, XenbusStateReconfiguring);  in displback_disconnect()
649 	xen_drm_drv_fini(front_info);  in displback_disconnect()
655 	struct xen_drm_front_info *front_info = dev_get_drvdata(&xb_dev->dev);  in displback_changed()  local
675 		displback_disconnect(front_info);  in displback_changed()
683 		displback_disconnect(front_info);  in displback_changed()
687 		ret = displback_initwait(front_info);  in displback_changed()
698 		ret = displback_connect(front_info);  in displback_changed()
700 			displback_disconnect(front_info);  in displback_changed()
721 		displback_disconnect(front_info);  in displback_changed()
729 	struct xen_drm_front_info *front_info;  in xen_drv_probe()  local
747 	front_info = devm_kzalloc(&xb_dev->dev,  in xen_drv_probe()
748 				  sizeof(*front_info), GFP_KERNEL);  in xen_drv_probe()
749 	if (!front_info)  in xen_drv_probe()
752 	front_info->xb_dev = xb_dev;  in xen_drv_probe()
753 	spin_lock_init(&front_info->io_lock);  in xen_drv_probe()
754 	INIT_LIST_HEAD(&front_info->dbuf_list);  in xen_drv_probe()
755 	dev_set_drvdata(&xb_dev->dev, front_info);  in xen_drv_probe()
762 	struct xen_drm_front_info *front_info = dev_get_drvdata(&dev->dev);  in xen_drv_remove()  local
778 	while ((xenbus_read_unsigned(front_info->xb_dev->otherend, "state",  in xen_drv_remove()
786 		state = xenbus_read_unsigned(front_info->xb_dev->otherend,  in xen_drv_remove()
792 	xen_drm_drv_fini(front_info);  in xen_drv_remove()