106 static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,
109 static void make_tx_response(struct xenvif_queue *queue,
114 static void xenvif_idx_unmap(struct xenvif_queue *queue, u16 pending_idx);
116 static inline int tx_work_todo(struct xenvif_queue *queue);
118 static inline unsigned long idx_to_pfn(struct xenvif_queue *queue,  in idx_to_pfn()  argument
121 	return page_to_pfn(queue->mmap_pages[idx]);  in idx_to_pfn()
124 static inline unsigned long idx_to_kaddr(struct xenvif_queue *queue,  in idx_to_kaddr()  argument
127 	return (unsigned long)pfn_to_kaddr(idx_to_pfn(queue, idx));  in idx_to_kaddr()
160 void xenvif_kick_thread(struct xenvif_queue *queue)  in xenvif_kick_thread()  argument
162 	wake_up(&queue->wq);  in xenvif_kick_thread()
165 void xenvif_napi_schedule_or_enable_events(struct xenvif_queue *queue)  in xenvif_napi_schedule_or_enable_events()  argument
169 	RING_FINAL_CHECK_FOR_REQUESTS(&queue->tx, more_to_do);  in xenvif_napi_schedule_or_enable_events()
172 		napi_schedule(&queue->napi);  in xenvif_napi_schedule_or_enable_events()
174 				     &queue->eoi_pending) &  in xenvif_napi_schedule_or_enable_events()
176 		xen_irq_lateeoi(queue->tx_irq, 0);  in xenvif_napi_schedule_or_enable_events()
179 static void tx_add_credit(struct xenvif_queue *queue)  in tx_add_credit()  argument
187 	max_burst = max(131072UL, queue->credit_bytes);  in tx_add_credit()
190 	max_credit = queue->remaining_credit + queue->credit_bytes;  in tx_add_credit()
191 	if (max_credit < queue->remaining_credit)  in tx_add_credit()
194 	queue->remaining_credit = min(max_credit, max_burst);  in tx_add_credit()
195 	queue->rate_limited = false;  in tx_add_credit()
200 	struct xenvif_queue *queue = from_timer(queue, t, credit_timeout);  in xenvif_tx_credit_callback()  local
201 	tx_add_credit(queue);  in xenvif_tx_credit_callback()
202 	xenvif_napi_schedule_or_enable_events(queue);  in xenvif_tx_credit_callback()
205 static void xenvif_tx_err(struct xenvif_queue *queue,  in xenvif_tx_err()  argument
209 	RING_IDX cons = queue->tx.req_cons;  in xenvif_tx_err()
212 		make_tx_response(queue, txp, extra_count, XEN_NETIF_RSP_ERROR);  in xenvif_tx_err()
215 		RING_COPY_REQUEST(&queue->tx, cons++, txp);  in xenvif_tx_err()
218 	queue->tx.req_cons = cons;  in xenvif_tx_err()
230 static int xenvif_count_requests(struct xenvif_queue *queue,  in xenvif_count_requests()  argument
236 	RING_IDX cons = queue->tx.req_cons;  in xenvif_count_requests()
248 			netdev_err(queue->vif->dev,  in xenvif_count_requests()
251 			xenvif_fatal_tx_err(queue->vif);  in xenvif_count_requests()
259 			netdev_err(queue->vif->dev,  in xenvif_count_requests()
262 			xenvif_fatal_tx_err(queue->vif);  in xenvif_count_requests()
275 				netdev_dbg(queue->vif->dev,  in xenvif_count_requests()
284 		RING_COPY_REQUEST(&queue->tx, cons + slots, txp);  in xenvif_count_requests()
297 				netdev_dbg(queue->vif->dev,  in xenvif_count_requests()
307 			netdev_err(queue->vif->dev, "Cross page boundary, txp->offset: %u, size: %u\n",  in xenvif_count_requests()
309 			xenvif_fatal_tx_err(queue->vif);  in xenvif_count_requests()
321 		xenvif_tx_err(queue, first, extra_count, cons + slots);  in xenvif_count_requests()
339 static inline void xenvif_tx_create_map_op(struct xenvif_queue *queue,  in xenvif_tx_create_map_op()  argument
345 	queue->pages_to_map[mop-queue->tx_map_ops] = queue->mmap_pages[pending_idx];  in xenvif_tx_create_map_op()
346 	gnttab_set_map_op(mop, idx_to_kaddr(queue, pending_idx),  in xenvif_tx_create_map_op()
348 			  txp->gref, queue->vif->domid);  in xenvif_tx_create_map_op()
350 	memcpy(&queue->pending_tx_info[pending_idx].req, txp,  in xenvif_tx_create_map_op()
352 	queue->pending_tx_info[pending_idx].extra_count = extra_count;  in xenvif_tx_create_map_op()
374 static void xenvif_get_requests(struct xenvif_queue *queue,  in xenvif_get_requests()  argument
390 	struct gnttab_copy *cop = queue->tx_copy_ops + *copy_ops;  in xenvif_get_requests()
391 	struct gnttab_map_grant_ref *gop = queue->tx_map_ops + *map_ops;  in xenvif_get_requests()
406 		cop->source.domid = queue->vif->domid;  in xenvif_get_requests()
426 		index = pending_index(queue->pending_cons);  in xenvif_get_requests()
427 		pending_idx = queue->pending_ring[index];  in xenvif_get_requests()
428 		callback_param(queue, pending_idx).ctx = NULL;  in xenvif_get_requests()
439 			memcpy(&queue->pending_tx_info[pending_idx].req,  in xenvif_get_requests()
441 			queue->pending_tx_info[pending_idx].extra_count =  in xenvif_get_requests()
448 			queue->pending_cons++;  in xenvif_get_requests()
463 			make_tx_response(queue, txp, 0, XEN_NETIF_RSP_OKAY);  in xenvif_get_requests()
468 		index = pending_index(queue->pending_cons++);  in xenvif_get_requests()
469 		pending_idx = queue->pending_ring[index];  in xenvif_get_requests()
470 		xenvif_tx_create_map_op(queue, pending_idx, txp,  in xenvif_get_requests()
489 				make_tx_response(queue, txp, 0,  in xenvif_get_requests()
494 			index = pending_index(queue->pending_cons++);  in xenvif_get_requests()
495 			pending_idx = queue->pending_ring[index];  in xenvif_get_requests()
496 			xenvif_tx_create_map_op(queue, pending_idx, txp, 0,  in xenvif_get_requests()
518 	(*copy_ops) = cop - queue->tx_copy_ops;  in xenvif_get_requests()
519 	(*map_ops) = gop - queue->tx_map_ops;  in xenvif_get_requests()
522 static inline void xenvif_grant_handle_set(struct xenvif_queue *queue,  in xenvif_grant_handle_set()  argument
526 	if (unlikely(queue->grant_tx_handle[pending_idx] !=  in xenvif_grant_handle_set()
528 		netdev_err(queue->vif->dev,  in xenvif_grant_handle_set()
533 	queue->grant_tx_handle[pending_idx] = handle;  in xenvif_grant_handle_set()
536 static inline void xenvif_grant_handle_reset(struct xenvif_queue *queue,  in xenvif_grant_handle_reset()  argument
539 	if (unlikely(queue->grant_tx_handle[pending_idx] ==  in xenvif_grant_handle_reset()
541 		netdev_err(queue->vif->dev,  in xenvif_grant_handle_reset()
546 	queue->grant_tx_handle[pending_idx] = NETBACK_INVALID_HANDLE;  in xenvif_grant_handle_reset()
549 static int xenvif_tx_check_gop(struct xenvif_queue *queue,  in xenvif_tx_check_gop()  argument
587 				xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
592 				netdev_dbg(queue->vif->dev,  in xenvif_tx_check_gop()
599 				xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
615 			xenvif_grant_handle_set(queue,  in xenvif_tx_check_gop()
620 				xenvif_idx_unmap(queue, pending_idx);  in xenvif_tx_check_gop()
626 					xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
629 					xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
637 			netdev_dbg(queue->vif->dev,  in xenvif_tx_check_gop()
644 		xenvif_idx_release(queue, pending_idx, XEN_NETIF_RSP_ERROR);  in xenvif_tx_check_gop()
653 			xenvif_idx_unmap(queue, pending_idx);  in xenvif_tx_check_gop()
654 			xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
664 				xenvif_idx_unmap(queue, pending_idx);  in xenvif_tx_check_gop()
665 				xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
686 static void xenvif_fill_frags(struct xenvif_queue *queue, struct sk_buff *skb)  in xenvif_fill_frags()  argument
704 				&callback_param(queue, pending_idx);  in xenvif_fill_frags()
706 			callback_param(queue, prev_pending_idx).ctx =  in xenvif_fill_frags()
707 				&callback_param(queue, pending_idx);  in xenvif_fill_frags()
709 		callback_param(queue, pending_idx).ctx = NULL;  in xenvif_fill_frags()
712 		txp = &queue->pending_tx_info[pending_idx].req;  in xenvif_fill_frags()
713 		page = virt_to_page((void *)idx_to_kaddr(queue, pending_idx));  in xenvif_fill_frags()
720 		get_page(queue->mmap_pages[pending_idx]);  in xenvif_fill_frags()
724 static int xenvif_get_extras(struct xenvif_queue *queue,  in xenvif_get_extras()  argument
730 	RING_IDX cons = queue->tx.req_cons;  in xenvif_get_extras()
734 			netdev_err(queue->vif->dev, "Missing extra info\n");  in xenvif_get_extras()
735 			xenvif_fatal_tx_err(queue->vif);  in xenvif_get_extras()
739 		RING_COPY_REQUEST(&queue->tx, cons, &extra);  in xenvif_get_extras()
741 		queue->tx.req_cons = ++cons;  in xenvif_get_extras()
746 			netdev_err(queue->vif->dev,  in xenvif_get_extras()
748 			xenvif_fatal_tx_err(queue->vif);  in xenvif_get_extras()
787 static int checksum_setup(struct xenvif_queue *queue, struct sk_buff *skb)  in checksum_setup()  argument
797 		queue->stats.rx_gso_checksum_fixup++;  in checksum_setup()
809 static bool tx_credit_exceeded(struct xenvif_queue *queue, unsigned size)  in tx_credit_exceeded()  argument
812 	u64 next_credit = queue->credit_window_start +  in tx_credit_exceeded()
813 		msecs_to_jiffies(queue->credit_usec / 1000);  in tx_credit_exceeded()
816 	if (timer_pending(&queue->credit_timeout)) {  in tx_credit_exceeded()
817 		queue->rate_limited = true;  in tx_credit_exceeded()
823 		queue->credit_window_start = now;  in tx_credit_exceeded()
824 		tx_add_credit(queue);  in tx_credit_exceeded()
828 	if (size > queue->remaining_credit) {  in tx_credit_exceeded()
829 		mod_timer(&queue->credit_timeout,  in tx_credit_exceeded()
831 		queue->credit_window_start = next_credit;  in tx_credit_exceeded()
832 		queue->rate_limited = true;  in tx_credit_exceeded()
914 static void xenvif_tx_build_gops(struct xenvif_queue *queue,  in xenvif_tx_build_gops()  argument
923 	while (skb_queue_len(&queue->tx_queue) < budget) {  in xenvif_tx_build_gops()
932 		if (queue->tx.sring->req_prod - queue->tx.req_cons >  in xenvif_tx_build_gops()
934 			netdev_err(queue->vif->dev,  in xenvif_tx_build_gops()
937 				   queue->tx.sring->req_prod, queue->tx.req_cons,  in xenvif_tx_build_gops()
939 			xenvif_fatal_tx_err(queue->vif);  in xenvif_tx_build_gops()
943 		work_to_do = XEN_RING_NR_UNCONSUMED_REQUESTS(&queue->tx);  in xenvif_tx_build_gops()
947 		idx = queue->tx.req_cons;  in xenvif_tx_build_gops()
949 		RING_COPY_REQUEST(&queue->tx, idx, &txreq);  in xenvif_tx_build_gops()
952 		if (txreq.size > queue->remaining_credit &&  in xenvif_tx_build_gops()
953 		    tx_credit_exceeded(queue, txreq.size))  in xenvif_tx_build_gops()
956 		queue->remaining_credit -= txreq.size;  in xenvif_tx_build_gops()
959 		queue->tx.req_cons = ++idx;  in xenvif_tx_build_gops()
964 			work_to_do = xenvif_get_extras(queue, extras,  in xenvif_tx_build_gops()
967 			idx = queue->tx.req_cons;  in xenvif_tx_build_gops()
976 			ret = xenvif_mcast_add(queue->vif, extra->u.mcast.addr);  in xenvif_tx_build_gops()
978 			make_tx_response(queue, &txreq, extra_count,  in xenvif_tx_build_gops()
989 			xenvif_mcast_del(queue->vif, extra->u.mcast.addr);  in xenvif_tx_build_gops()
991 			make_tx_response(queue, &txreq, extra_count,  in xenvif_tx_build_gops()
999 		ret = xenvif_count_requests(queue, &txreq, extra_count,  in xenvif_tx_build_gops()
1008 			netdev_dbg(queue->vif->dev,  in xenvif_tx_build_gops()
1010 			xenvif_tx_err(queue, &txreq, extra_count, idx);  in xenvif_tx_build_gops()
1016 			netdev_err(queue->vif->dev, "Cross page boundary, txreq.offset: %u, size: %u\n",  in xenvif_tx_build_gops()
1018 			xenvif_fatal_tx_err(queue->vif);  in xenvif_tx_build_gops()
1027 			netdev_dbg(queue->vif->dev,  in xenvif_tx_build_gops()
1029 			xenvif_tx_err(queue, &txreq, extra_count, idx);  in xenvif_tx_build_gops()
1047 				xenvif_tx_err(queue, &txreq, extra_count, idx);  in xenvif_tx_build_gops()
1049 					netdev_err(queue->vif->dev,  in xenvif_tx_build_gops()
1059 			if (xenvif_set_skb_gso(queue->vif, skb, gso)) {  in xenvif_tx_build_gops()
1095 		xenvif_get_requests(queue, skb, &txreq, txfrags, copy_ops,  in xenvif_tx_build_gops()
1099 		__skb_queue_tail(&queue->tx_queue, skb);  in xenvif_tx_build_gops()
1101 		queue->tx.req_cons = idx;  in xenvif_tx_build_gops()
1110 static int xenvif_handle_frag_list(struct xenvif_queue *queue, struct sk_buff *skb)  in xenvif_handle_frag_list()  argument
1118 	queue->stats.tx_zerocopy_sent += 2;  in xenvif_handle_frag_list()
1119 	queue->stats.tx_frag_overflow++;  in xenvif_handle_frag_list()
1121 	xenvif_fill_frags(queue, nskb);  in xenvif_handle_frag_list()
1158 	atomic_inc(&queue->inflight_packets);  in xenvif_handle_frag_list()
1170 static int xenvif_tx_submit(struct xenvif_queue *queue)  in xenvif_tx_submit()  argument
1172 	struct gnttab_map_grant_ref *gop_map = queue->tx_map_ops;  in xenvif_tx_submit()
1173 	struct gnttab_copy *gop_copy = queue->tx_copy_ops;  in xenvif_tx_submit()
1177 	while ((skb = __skb_dequeue(&queue->tx_queue)) != NULL) {  in xenvif_tx_submit()
1182 		txp = &queue->pending_tx_info[pending_idx].req;  in xenvif_tx_submit()
1185 		if (unlikely(xenvif_tx_check_gop(queue, skb, &gop_map, &gop_copy))) {  in xenvif_tx_submit()
1205 		xenvif_fill_frags(queue, skb);  in xenvif_tx_submit()
1209 			xenvif_skb_zerocopy_prepare(queue, nskb);  in xenvif_tx_submit()
1210 			if (xenvif_handle_frag_list(queue, skb)) {  in xenvif_tx_submit()
1212 					netdev_err(queue->vif->dev,  in xenvif_tx_submit()
1214 				xenvif_skb_zerocopy_prepare(queue, skb);  in xenvif_tx_submit()
1223 		skb->dev      = queue->vif->dev;  in xenvif_tx_submit()
1227 		if (checksum_setup(queue, skb)) {  in xenvif_tx_submit()
1228 			netdev_dbg(queue->vif->dev,  in xenvif_tx_submit()
1232 				xenvif_skb_zerocopy_prepare(queue, skb);  in xenvif_tx_submit()
1260 		queue->stats.rx_bytes += skb->len;  in xenvif_tx_submit()
1261 		queue->stats.rx_packets++;  in xenvif_tx_submit()
1271 			xenvif_skb_zerocopy_prepare(queue, skb);  in xenvif_tx_submit()
1272 			queue->stats.tx_zerocopy_sent++;  in xenvif_tx_submit()
1287 	struct xenvif_queue *queue = ubuf_to_queue(ubuf);  in xenvif_zerocopy_callback()  local
1292 	spin_lock_irqsave(&queue->callback_lock, flags);  in xenvif_zerocopy_callback()
1296 		BUG_ON(queue->dealloc_prod - queue->dealloc_cons >=  in xenvif_zerocopy_callback()
1298 		index = pending_index(queue->dealloc_prod);  in xenvif_zerocopy_callback()
1299 		queue->dealloc_ring[index] = pending_idx;  in xenvif_zerocopy_callback()
1304 		queue->dealloc_prod++;  in xenvif_zerocopy_callback()
1306 	spin_unlock_irqrestore(&queue->callback_lock, flags);  in xenvif_zerocopy_callback()
1309 		queue->stats.tx_zerocopy_success++;  in xenvif_zerocopy_callback()
1311 		queue->stats.tx_zerocopy_fail++;  in xenvif_zerocopy_callback()
1312 	xenvif_skb_zerocopy_complete(queue);  in xenvif_zerocopy_callback()
1315 static inline void xenvif_tx_dealloc_action(struct xenvif_queue *queue)  in xenvif_tx_dealloc_action()  argument
1322 	dc = queue->dealloc_cons;  in xenvif_tx_dealloc_action()
1323 	gop = queue->tx_unmap_ops;  in xenvif_tx_dealloc_action()
1327 		dp = queue->dealloc_prod;  in xenvif_tx_dealloc_action()
1335 			BUG_ON(gop - queue->tx_unmap_ops >= MAX_PENDING_REQS);  in xenvif_tx_dealloc_action()
1337 				queue->dealloc_ring[pending_index(dc++)];  in xenvif_tx_dealloc_action()
1339 			pending_idx_release[gop - queue->tx_unmap_ops] =  in xenvif_tx_dealloc_action()
1341 			queue->pages_to_unmap[gop - queue->tx_unmap_ops] =  in xenvif_tx_dealloc_action()
1342 				queue->mmap_pages[pending_idx];  in xenvif_tx_dealloc_action()
1344 					    idx_to_kaddr(queue, pending_idx),  in xenvif_tx_dealloc_action()
1346 					    queue->grant_tx_handle[pending_idx]);  in xenvif_tx_dealloc_action()
1347 			xenvif_grant_handle_reset(queue, pending_idx);  in xenvif_tx_dealloc_action()
1351 	} while (dp != queue->dealloc_prod);  in xenvif_tx_dealloc_action()
1353 	queue->dealloc_cons = dc;  in xenvif_tx_dealloc_action()
1355 	if (gop - queue->tx_unmap_ops > 0) {  in xenvif_tx_dealloc_action()
1357 		ret = gnttab_unmap_refs(queue->tx_unmap_ops,  in xenvif_tx_dealloc_action()
1359 					queue->pages_to_unmap,  in xenvif_tx_dealloc_action()
1360 					gop - queue->tx_unmap_ops);  in xenvif_tx_dealloc_action()
1362 			netdev_err(queue->vif->dev, "Unmap fail: nr_ops %tu ret %d\n",  in xenvif_tx_dealloc_action()
1363 				   gop - queue->tx_unmap_ops, ret);  in xenvif_tx_dealloc_action()
1364 			for (i = 0; i < gop - queue->tx_unmap_ops; ++i) {  in xenvif_tx_dealloc_action()
1366 					netdev_err(queue->vif->dev,  in xenvif_tx_dealloc_action()
1376 	for (i = 0; i < gop - queue->tx_unmap_ops; ++i)  in xenvif_tx_dealloc_action()
1377 		xenvif_idx_release(queue, pending_idx_release[i],  in xenvif_tx_dealloc_action()
1383 int xenvif_tx_action(struct xenvif_queue *queue, int budget)  in xenvif_tx_action()  argument
1388 	if (unlikely(!tx_work_todo(queue)))  in xenvif_tx_action()
1391 	xenvif_tx_build_gops(queue, budget, &nr_cops, &nr_mops);  in xenvif_tx_action()
1396 	gnttab_batch_copy(queue->tx_copy_ops, nr_cops);  in xenvif_tx_action()
1398 		ret = gnttab_map_refs(queue->tx_map_ops,  in xenvif_tx_action()
1400 				      queue->pages_to_map,  in xenvif_tx_action()
1405 			netdev_err(queue->vif->dev, "Map fail: nr %u ret %d\n",  in xenvif_tx_action()
1408 				WARN_ON_ONCE(queue->tx_map_ops[i].status ==  in xenvif_tx_action()
1413 	work_done = xenvif_tx_submit(queue);  in xenvif_tx_action()
1418 static void _make_tx_response(struct xenvif_queue *queue,  in _make_tx_response()  argument
1423 	RING_IDX i = queue->tx.rsp_prod_pvt;  in _make_tx_response()
1426 	resp = RING_GET_RESPONSE(&queue->tx, i);  in _make_tx_response()
1431 		RING_GET_RESPONSE(&queue->tx, ++i)->status = XEN_NETIF_RSP_NULL;  in _make_tx_response()
1433 	queue->tx.rsp_prod_pvt = ++i;  in _make_tx_response()
1436 static void push_tx_responses(struct xenvif_queue *queue)  in push_tx_responses()  argument
1440 	RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&queue->tx, notify);  in push_tx_responses()
1442 		notify_remote_via_irq(queue->tx_irq);  in push_tx_responses()
1445 static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,  in xenvif_idx_release()  argument
1452 	pending_tx_info = &queue->pending_tx_info[pending_idx];  in xenvif_idx_release()
1454 	spin_lock_irqsave(&queue->response_lock, flags);  in xenvif_idx_release()
1456 	_make_tx_response(queue, &pending_tx_info->req,  in xenvif_idx_release()
1463 	index = pending_index(queue->pending_prod++);  in xenvif_idx_release()
1464 	queue->pending_ring[index] = pending_idx;  in xenvif_idx_release()
1466 	push_tx_responses(queue);  in xenvif_idx_release()
1468 	spin_unlock_irqrestore(&queue->response_lock, flags);  in xenvif_idx_release()
1471 static void make_tx_response(struct xenvif_queue *queue,  in make_tx_response()  argument
1478 	spin_lock_irqsave(&queue->response_lock, flags);  in make_tx_response()
1480 	_make_tx_response(queue, txp, extra_count, status);  in make_tx_response()
1481 	push_tx_responses(queue);  in make_tx_response()
1483 	spin_unlock_irqrestore(&queue->response_lock, flags);  in make_tx_response()
1486 static void xenvif_idx_unmap(struct xenvif_queue *queue, u16 pending_idx)  in xenvif_idx_unmap()  argument
1492 			    idx_to_kaddr(queue, pending_idx),  in xenvif_idx_unmap()
1494 			    queue->grant_tx_handle[pending_idx]);  in xenvif_idx_unmap()
1495 	xenvif_grant_handle_reset(queue, pending_idx);  in xenvif_idx_unmap()
1498 				&queue->mmap_pages[pending_idx], 1);  in xenvif_idx_unmap()
1500 		netdev_err(queue->vif->dev,  in xenvif_idx_unmap()
1511 static inline int tx_work_todo(struct xenvif_queue *queue)  in tx_work_todo()  argument
1513 	if (likely(RING_HAS_UNCONSUMED_REQUESTS(&queue->tx)))  in tx_work_todo()
1519 static inline bool tx_dealloc_work_todo(struct xenvif_queue *queue)  in tx_dealloc_work_todo()  argument
1521 	return queue->dealloc_cons != queue->dealloc_prod;  in tx_dealloc_work_todo()
1524 void xenvif_unmap_frontend_data_rings(struct xenvif_queue *queue)  in xenvif_unmap_frontend_data_rings()  argument
1526 	if (queue->tx.sring)  in xenvif_unmap_frontend_data_rings()
1527 		xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(queue->vif),  in xenvif_unmap_frontend_data_rings()
1528 					queue->tx.sring);  in xenvif_unmap_frontend_data_rings()
1529 	if (queue->rx.sring)  in xenvif_unmap_frontend_data_rings()
1530 		xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(queue->vif),  in xenvif_unmap_frontend_data_rings()
1531 					queue->rx.sring);  in xenvif_unmap_frontend_data_rings()
1534 int xenvif_map_frontend_data_rings(struct xenvif_queue *queue,  in xenvif_map_frontend_data_rings()  argument
1544 	err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(queue->vif),  in xenvif_map_frontend_data_rings()
1553 	BACK_RING_ATTACH(&queue->tx, txs, rsp_prod, XEN_PAGE_SIZE);  in xenvif_map_frontend_data_rings()
1556 	if (req_prod - rsp_prod > RING_SIZE(&queue->tx))  in xenvif_map_frontend_data_rings()
1559 	err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(queue->vif),  in xenvif_map_frontend_data_rings()
1568 	BACK_RING_ATTACH(&queue->rx, rxs, rsp_prod, XEN_PAGE_SIZE);  in xenvif_map_frontend_data_rings()
1571 	if (req_prod - rsp_prod > RING_SIZE(&queue->rx))  in xenvif_map_frontend_data_rings()
1577 	xenvif_unmap_frontend_data_rings(queue);  in xenvif_map_frontend_data_rings()
1581 static bool xenvif_dealloc_kthread_should_stop(struct xenvif_queue *queue)  in xenvif_dealloc_kthread_should_stop()  argument
1587 		!atomic_read(&queue->inflight_packets);  in xenvif_dealloc_kthread_should_stop()
1592 	struct xenvif_queue *queue = data;  in xenvif_dealloc_kthread()  local
1595 		wait_event_interruptible(queue->dealloc_wq,  in xenvif_dealloc_kthread()
1596 					 tx_dealloc_work_todo(queue) ||  in xenvif_dealloc_kthread()
1597 					 xenvif_dealloc_kthread_should_stop(queue));  in xenvif_dealloc_kthread()
1598 		if (xenvif_dealloc_kthread_should_stop(queue))  in xenvif_dealloc_kthread()
1601 		xenvif_tx_dealloc_action(queue);  in xenvif_dealloc_kthread()
1606 	if (tx_dealloc_work_todo(queue))  in xenvif_dealloc_kthread()
1607 		xenvif_tx_dealloc_action(queue);  in xenvif_dealloc_kthread()