89 be_prepare_req(struct xen_drm_front_evtchnl *evtchnl, u8 operation)  in be_prepare_req()  argument
93 	req = RING_GET_REQUEST(&evtchnl->u.req.ring,  in be_prepare_req()
94 			       evtchnl->u.req.ring.req_prod_pvt);  in be_prepare_req()
96 	req->id = evtchnl->evt_next_id++;  in be_prepare_req()
97 	evtchnl->evt_id = req->id;  in be_prepare_req()
101 static int be_stream_do_io(struct xen_drm_front_evtchnl *evtchnl,  in be_stream_do_io()  argument
104 	reinit_completion(&evtchnl->u.req.completion);  in be_stream_do_io()
105 	if (unlikely(evtchnl->state != EVTCHNL_STATE_CONNECTED))  in be_stream_do_io()
108 	xen_drm_front_evtchnl_flush(evtchnl);  in be_stream_do_io()
112 static int be_stream_wait_io(struct xen_drm_front_evtchnl *evtchnl)  in be_stream_wait_io()  argument
114 	if (wait_for_completion_timeout(&evtchnl->u.req.completion,  in be_stream_wait_io()
118 	return evtchnl->u.req.resp_status;  in be_stream_wait_io()
125 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_mode_set()  local
132 	evtchnl = &front_info->evt_pairs[pipeline->index].req;  in xen_drm_front_mode_set()
133 	if (unlikely(!evtchnl))  in xen_drm_front_mode_set()
136 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_mode_set()
139 	req = be_prepare_req(evtchnl, XENDISPL_OP_SET_CONFIG);  in xen_drm_front_mode_set()
147 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_mode_set()
151 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_mode_set()
153 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_mode_set()
162 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_dbuf_create()  local
169 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_create()
170 	if (unlikely(!evtchnl))  in xen_drm_front_dbuf_create()
190 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_create()
193 	req = be_prepare_req(evtchnl, XENDISPL_OP_DBUF_CREATE);  in xen_drm_front_dbuf_create()
205 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_dbuf_create()
211 	ret = be_stream_wait_io(evtchnl);  in xen_drm_front_dbuf_create()
219 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_create()
223 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_create()
232 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_dbuf_destroy()  local
238 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_destroy()
239 	if (unlikely(!evtchnl))  in xen_drm_front_dbuf_destroy()
251 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_destroy()
254 	req = be_prepare_req(evtchnl, XENDISPL_OP_DBUF_DESTROY);  in xen_drm_front_dbuf_destroy()
257 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_dbuf_destroy()
261 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_dbuf_destroy()
270 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_destroy()
278 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_fb_attach()  local
284 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_attach()
285 	if (unlikely(!evtchnl))  in xen_drm_front_fb_attach()
294 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_attach()
297 	req = be_prepare_req(evtchnl, XENDISPL_OP_FB_ATTACH);  in xen_drm_front_fb_attach()
304 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_fb_attach()
308 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_fb_attach()
310 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_attach()
317 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_fb_detach()  local
322 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_detach()
323 	if (unlikely(!evtchnl))  in xen_drm_front_fb_detach()
326 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_detach()
329 	req = be_prepare_req(evtchnl, XENDISPL_OP_FB_DETACH);  in xen_drm_front_fb_detach()
332 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_fb_detach()
336 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_fb_detach()
338 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_detach()
345 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_page_flip()  local
353 	evtchnl = &front_info->evt_pairs[conn_idx].req;  in xen_drm_front_page_flip()
355 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_page_flip()
358 	req = be_prepare_req(evtchnl, XENDISPL_OP_PG_FLIP);  in xen_drm_front_page_flip()
361 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_page_flip()
365 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_page_flip()
367 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_page_flip()