90 be_prepare_req(struct xen_drm_front_evtchnl *evtchnl, u8 operation)  in be_prepare_req()  argument
94 	req = RING_GET_REQUEST(&evtchnl->u.req.ring,  in be_prepare_req()
95 			       evtchnl->u.req.ring.req_prod_pvt);  in be_prepare_req()
97 	req->id = evtchnl->evt_next_id++;  in be_prepare_req()
98 	evtchnl->evt_id = req->id;  in be_prepare_req()
102 static int be_stream_do_io(struct xen_drm_front_evtchnl *evtchnl,  in be_stream_do_io()  argument
105 	reinit_completion(&evtchnl->u.req.completion);  in be_stream_do_io()
106 	if (unlikely(evtchnl->state != EVTCHNL_STATE_CONNECTED))  in be_stream_do_io()
109 	xen_drm_front_evtchnl_flush(evtchnl);  in be_stream_do_io()
113 static int be_stream_wait_io(struct xen_drm_front_evtchnl *evtchnl)  in be_stream_wait_io()  argument
115 	if (wait_for_completion_timeout(&evtchnl->u.req.completion,  in be_stream_wait_io()
119 	return evtchnl->u.req.resp_status;  in be_stream_wait_io()
126 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_mode_set()  local
133 	evtchnl = &front_info->evt_pairs[pipeline->index].req;  in xen_drm_front_mode_set()
134 	if (unlikely(!evtchnl))  in xen_drm_front_mode_set()
137 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_mode_set()
140 	req = be_prepare_req(evtchnl, XENDISPL_OP_SET_CONFIG);  in xen_drm_front_mode_set()
148 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_mode_set()
152 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_mode_set()
154 	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()
204 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_dbuf_create()
210 	ret = be_stream_wait_io(evtchnl);  in xen_drm_front_dbuf_create()
218 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_create()
222 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_create()
231 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_dbuf_destroy()  local
237 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_dbuf_destroy()
238 	if (unlikely(!evtchnl))  in xen_drm_front_dbuf_destroy()
250 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_destroy()
253 	req = be_prepare_req(evtchnl, XENDISPL_OP_DBUF_DESTROY);  in xen_drm_front_dbuf_destroy()
256 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_dbuf_destroy()
260 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_dbuf_destroy()
269 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_dbuf_destroy()
277 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_fb_attach()  local
283 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_attach()
284 	if (unlikely(!evtchnl))  in xen_drm_front_fb_attach()
293 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_attach()
296 	req = be_prepare_req(evtchnl, XENDISPL_OP_FB_ATTACH);  in xen_drm_front_fb_attach()
303 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_fb_attach()
307 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_fb_attach()
309 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_attach()
316 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_fb_detach()  local
321 	evtchnl = &front_info->evt_pairs[GENERIC_OP_EVT_CHNL].req;  in xen_drm_front_fb_detach()
322 	if (unlikely(!evtchnl))  in xen_drm_front_fb_detach()
325 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_detach()
328 	req = be_prepare_req(evtchnl, XENDISPL_OP_FB_DETACH);  in xen_drm_front_fb_detach()
331 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_fb_detach()
335 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_fb_detach()
337 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_fb_detach()
344 	struct xen_drm_front_evtchnl *evtchnl;  in xen_drm_front_page_flip()  local
352 	evtchnl = &front_info->evt_pairs[conn_idx].req;  in xen_drm_front_page_flip()
354 	mutex_lock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_page_flip()
357 	req = be_prepare_req(evtchnl, XENDISPL_OP_PG_FLIP);  in xen_drm_front_page_flip()
360 	ret = be_stream_do_io(evtchnl, req);  in xen_drm_front_page_flip()
364 		ret = be_stream_wait_io(evtchnl);  in xen_drm_front_page_flip()
366 	mutex_unlock(&evtchnl->u.req.req_io_lock);  in xen_drm_front_page_flip()