101 be_prepare_req(struct xen_drm_front_evtchnl *evtchnl, u8 operation)  in be_prepare_req()  argument
105 	req = RING_GET_REQUEST(&evtchnl->u.req.ring,  in be_prepare_req()
106 			       evtchnl->u.req.ring.req_prod_pvt);  in be_prepare_req()
108 	req->id = evtchnl->evt_next_id++;  in be_prepare_req()
109 	evtchnl->evt_id = req->id;  in be_prepare_req()
113 static int be_stream_do_io(struct xen_drm_front_evtchnl *evtchnl,  in be_stream_do_io()  argument
116 	reinit_completion(&evtchnl->u.req.completion);  in be_stream_do_io()
117 	if (unlikely(evtchnl->state != EVTCHNL_STATE_CONNECTED))  in be_stream_do_io()
120 	xen_drm_front_evtchnl_flush(evtchnl);  in be_stream_do_io()
124 static int be_stream_wait_io(struct xen_drm_front_evtchnl *evtchnl)  in be_stream_wait_io()  argument
126 	if (wait_for_completion_timeout(&evtchnl->u.req.completion,  in be_stream_wait_io()
130 	return evtchnl->u.req.resp_status;  in be_stream_wait_io()
137 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_mode_set()  local
144 	evtchnl = &front_info->evt_pairs[pipeline->index].req;  in xen_drm_front_mode_set()
145 	if (unlikely(!evtchnl))  in xen_drm_front_mode_set()
148 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_mode_set()
151 	req = be_prepare_req(evtchnl, XENDISPL_OP_SET_CONFIG);  in xen_drm_front_mode_set()
159 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_mode_set()
163 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_mode_set()
165 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_mode_set()
173 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_dbuf_create()  local
180 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_create()
181 	if (unlikely(!evtchnl))  in xen_drm_front_dbuf_create()
200 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_create()
203 	req = be_prepare_req(evtchnl, XENDISPL_OP_DBUF_CREATE);  in xen_drm_front_dbuf_create()
214 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_dbuf_create()
220 	ret = be_stream_wait_io(evtchnl);  in xen_drm_front_dbuf_create()
228 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_create()
232 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_create()
240 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_dbuf_destroy()  local
246 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_destroy()
247 	if (unlikely(!evtchnl))  in xen_drm_front_dbuf_destroy()
259 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_destroy()
262 	req = be_prepare_req(evtchnl, XENDISPL_OP_DBUF_DESTROY);  in xen_drm_front_dbuf_destroy()
265 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_dbuf_destroy()
269 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_dbuf_destroy()
278 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_destroy()
286 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_fb_attach()  local
292 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_attach()
293 	if (unlikely(!evtchnl))  in xen_drm_front_fb_attach()
302 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_attach()
305 	req = be_prepare_req(evtchnl, XENDISPL_OP_FB_ATTACH);  in xen_drm_front_fb_attach()
312 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_fb_attach()
316 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_fb_attach()
318 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_attach()
325 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_fb_detach()  local
330 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_detach()
331 	if (unlikely(!evtchnl))  in xen_drm_front_fb_detach()
334 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_detach()
337 	req = be_prepare_req(evtchnl, XENDISPL_OP_FB_DETACH);  in xen_drm_front_fb_detach()
340 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_fb_detach()
344 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_fb_detach()
346 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_detach()
353 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_page_flip()  local
362 	evtchnl = &front_info->evt_pairs[conn_idx].req;  in xen_drm_front_page_flip()
364 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_page_flip()
367 	req = be_prepare_req(evtchnl, XENDISPL_OP_PG_FLIP);  in xen_drm_front_page_flip()
370 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_page_flip()
374 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_page_flip()
376 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_page_flip()