44 static void dbuf_add_to_list(struct xen_drm_front_info *front_info,  in dbuf_add_to_list()  argument
48 	list_add(&dbuf->list, &front_info->dbuf_list);  in dbuf_add_to_list()
127 	struct xen_drm_front_info *front_info;  in xen_drm_front_mode_set()  local
132 	front_info = pipeline->drm_info->front_info;  in xen_drm_front_mode_set()
133 	evtchnl = &front_info->evt_pairs[pipeline->index].req;  in xen_drm_front_mode_set()
139 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_mode_set()
149 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_mode_set()
158 int xen_drm_front_dbuf_create(struct xen_drm_front_info *front_info,  in xen_drm_front_dbuf_create()  argument
170 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_create()
178 	dbuf_add_to_list(front_info, dbuf, dbuf_cookie);  in xen_drm_front_dbuf_create()
181 	buf_cfg.xb_dev = front_info->xb_dev;  in xen_drm_front_dbuf_create()
185 	buf_cfg.be_alloc = front_info->cfg.be_alloc;  in xen_drm_front_dbuf_create()
193 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_dbuf_create()
207 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_dbuf_create()
226 	dbuf_free(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_dbuf_create()
230 static int xen_drm_front_dbuf_destroy(struct xen_drm_front_info *front_info,  in xen_drm_front_dbuf_destroy()  argument
239 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_destroy()
243 	be_alloc = front_info->cfg.be_alloc;  in xen_drm_front_dbuf_destroy()
250 		dbuf_free(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_dbuf_destroy()
254 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_dbuf_destroy()
259 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_dbuf_destroy()
269 		dbuf_free(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_dbuf_destroy()
275 int xen_drm_front_fb_attach(struct xen_drm_front_info *front_info,  in xen_drm_front_fb_attach()  argument
285 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_attach()
289 	buf = dbuf_get(&front_info->dbuf_list, dbuf_cookie);  in xen_drm_front_fb_attach()
297 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_fb_attach()
306 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_fb_attach()
315 int xen_drm_front_fb_detach(struct xen_drm_front_info *front_info,  in xen_drm_front_fb_detach()  argument
323 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_detach()
329 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_fb_detach()
334 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_fb_detach()
343 int xen_drm_front_page_flip(struct xen_drm_front_info *front_info,  in xen_drm_front_page_flip()  argument
351 	if (unlikely(conn_idx >= front_info->num_evt_pairs))  in xen_drm_front_page_flip()
354 	evtchnl = &front_info->evt_pairs[conn_idx].req;  in xen_drm_front_page_flip()
358 	spin_lock_irqsave(&front_info->io_lock, flags);  in xen_drm_front_page_flip()
363 	spin_unlock_irqrestore(&front_info->io_lock, flags);  in xen_drm_front_page_flip()
372 void xen_drm_front_on_frame_done(struct xen_drm_front_info *front_info,  in xen_drm_front_on_frame_done()  argument
375 	struct xen_drm_front_drm_info *drm_info = front_info->drm_info;  in xen_drm_front_on_frame_done()
377 	if (unlikely(conn_idx >= front_info->cfg.num_connectors))  in xen_drm_front_on_frame_done()
390 		xen_drm_front_dbuf_destroy(drm_info->front_info,  in xen_drm_front_gem_object_free()
394 		dbuf_free(&drm_info->front_info->dbuf_list,  in xen_drm_front_gem_object_free()
427 	ret = xen_drm_front_dbuf_create(drm_info->front_info,  in xen_drm_drv_dumb_create()
445 	xen_drm_front_dbuf_destroy(drm_info->front_info,  in xen_drm_drv_dumb_create()
458 	struct xen_drm_front_info *front_info = drm_info->front_info;  in xen_drm_drv_release()  local
465 	if (front_info->cfg.be_alloc)  in xen_drm_drv_release()
466 		xenbus_switch_state(front_info->xb_dev,  in xen_drm_drv_release()
491 static int xen_drm_drv_init(struct xen_drm_front_info *front_info)  in xen_drm_drv_init()  argument
493 	struct device *dev = &front_info->xb_dev->dev;  in xen_drm_drv_init()
509 	drm_info->front_info = front_info;  in xen_drm_drv_init()
510 	front_info->drm_info = drm_info;  in xen_drm_drv_init()
547 	front_info->drm_info = NULL;  in xen_drm_drv_init()
552 static void xen_drm_drv_fini(struct xen_drm_front_info *front_info)  in xen_drm_drv_fini()  argument
554 	struct xen_drm_front_drm_info *drm_info = front_info->drm_info;  in xen_drm_drv_fini()
572 	front_info->drm_info = NULL;  in xen_drm_drv_fini()
574 	xen_drm_front_evtchnl_free_all(front_info);  in xen_drm_drv_fini()
575 	dbuf_free_all(&front_info->dbuf_list);  in xen_drm_drv_fini()
582 	if (!front_info->cfg.be_alloc)  in xen_drm_drv_fini()
583 		xenbus_switch_state(front_info->xb_dev,  in xen_drm_drv_fini()
587 static int displback_initwait(struct xen_drm_front_info *front_info)  in displback_initwait()  argument
589 	struct xen_drm_front_cfg *cfg = &front_info->cfg;  in displback_initwait()
592 	cfg->front_info = front_info;  in displback_initwait()
593 	ret = xen_drm_front_cfg_card(front_info, cfg);  in displback_initwait()
599 	ret = xen_drm_front_evtchnl_create_all(front_info);  in displback_initwait()
603 	return xen_drm_front_evtchnl_publish_all(front_info);  in displback_initwait()
606 static int displback_connect(struct xen_drm_front_info *front_info)  in displback_connect()  argument
608 	xen_drm_front_evtchnl_set_state(front_info, EVTCHNL_STATE_CONNECTED);  in displback_connect()
609 	return xen_drm_drv_init(front_info);  in displback_connect()
612 static void displback_disconnect(struct xen_drm_front_info *front_info)  in displback_disconnect()  argument
614 	if (!front_info->drm_info)  in displback_disconnect()
618 	xenbus_switch_state(front_info->xb_dev, XenbusStateReconfiguring);  in displback_disconnect()
620 	xen_drm_drv_fini(front_info);  in displback_disconnect()
626 	struct xen_drm_front_info *front_info = dev_get_drvdata(&xb_dev->dev);  in displback_changed()  local
644 		displback_disconnect(front_info);  in displback_changed()
652 		displback_disconnect(front_info);  in displback_changed()
656 		ret = displback_initwait(front_info);  in displback_changed()
667 		ret = displback_connect(front_info);  in displback_changed()
669 			displback_disconnect(front_info);  in displback_changed()
689 		displback_disconnect(front_info);  in displback_changed()
697 	struct xen_drm_front_info *front_info;  in xen_drv_probe()  local
707 	front_info = devm_kzalloc(&xb_dev->dev,  in xen_drv_probe()
708 				  sizeof(*front_info), GFP_KERNEL);  in xen_drv_probe()
709 	if (!front_info)  in xen_drv_probe()
712 	front_info->xb_dev = xb_dev;  in xen_drv_probe()
713 	spin_lock_init(&front_info->io_lock);  in xen_drv_probe()
714 	INIT_LIST_HEAD(&front_info->dbuf_list);  in xen_drv_probe()
715 	dev_set_drvdata(&xb_dev->dev, front_info);  in xen_drv_probe()
722 	struct xen_drm_front_info *front_info = dev_get_drvdata(&dev->dev);  in xen_drv_remove()  local
738 	while ((xenbus_read_unsigned(front_info->xb_dev->otherend, "state",  in xen_drv_remove()
746 		state = xenbus_read_unsigned(front_info->xb_dev->otherend,  in xen_drv_remove()
752 	xen_drm_drv_fini(front_info);  in xen_drv_remove()