59 /* The time that packets can stay on the guest Rx internal queue
107 static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,
110 static void make_tx_response(struct xenvif_queue *queue,
115 static void xenvif_idx_unmap(struct xenvif_queue *queue, u16 pending_idx);
117 static inline int tx_work_todo(struct xenvif_queue *queue);
119 static inline unsigned long idx_to_pfn(struct xenvif_queue *queue,  in idx_to_pfn()  argument
122 	return page_to_pfn(queue->mmap_pages[idx]);  in idx_to_pfn()
125 static inline unsigned long idx_to_kaddr(struct xenvif_queue *queue,  in idx_to_kaddr()  argument
128 	return (unsigned long)pfn_to_kaddr(idx_to_pfn(queue, idx));  in idx_to_kaddr()
161 void xenvif_kick_thread(struct xenvif_queue *queue)  in xenvif_kick_thread()  argument
163 	wake_up(&queue->wq);  in xenvif_kick_thread()
166 void xenvif_napi_schedule_or_enable_events(struct xenvif_queue *queue)  in xenvif_napi_schedule_or_enable_events()  argument
170 	RING_FINAL_CHECK_FOR_REQUESTS(&queue->tx, more_to_do);  in xenvif_napi_schedule_or_enable_events()
173 		napi_schedule(&queue->napi);  in xenvif_napi_schedule_or_enable_events()
175 				     &queue->eoi_pending) &  in xenvif_napi_schedule_or_enable_events()
177 		xen_irq_lateeoi(queue->tx_irq, 0);  in xenvif_napi_schedule_or_enable_events()
180 static void tx_add_credit(struct xenvif_queue *queue)  in tx_add_credit()  argument
188 	max_burst = max(131072UL, queue->credit_bytes);  in tx_add_credit()
191 	max_credit = queue->remaining_credit + queue->credit_bytes;  in tx_add_credit()
192 	if (max_credit < queue->remaining_credit)  in tx_add_credit()
195 	queue->remaining_credit = min(max_credit, max_burst);  in tx_add_credit()
196 	queue->rate_limited = false;  in tx_add_credit()
201 	struct xenvif_queue *queue = from_timer(queue, t, credit_timeout);  in xenvif_tx_credit_callback()  local
202 	tx_add_credit(queue);  in xenvif_tx_credit_callback()
203 	xenvif_napi_schedule_or_enable_events(queue);  in xenvif_tx_credit_callback()
206 static void xenvif_tx_err(struct xenvif_queue *queue,  in xenvif_tx_err()  argument
210 	RING_IDX cons = queue->tx.req_cons;  in xenvif_tx_err()
213 		make_tx_response(queue, txp, extra_count, XEN_NETIF_RSP_ERROR);  in xenvif_tx_err()
216 		RING_COPY_REQUEST(&queue->tx, cons++, txp);  in xenvif_tx_err()
219 	queue->tx.req_cons = cons;  in xenvif_tx_err()
226 	/* Disable the vif from queue 0's kthread */  in xenvif_fatal_tx_err()
231 static int xenvif_count_requests(struct xenvif_queue *queue,  in xenvif_count_requests()  argument
237 	RING_IDX cons = queue->tx.req_cons;  in xenvif_count_requests()
249 			netdev_err(queue->vif->dev,  in xenvif_count_requests()
252 			xenvif_fatal_tx_err(queue->vif);  in xenvif_count_requests()
260 			netdev_err(queue->vif->dev,  in xenvif_count_requests()
263 			xenvif_fatal_tx_err(queue->vif);  in xenvif_count_requests()
276 				netdev_dbg(queue->vif->dev,  in xenvif_count_requests()
285 		RING_COPY_REQUEST(&queue->tx, cons + slots, txp);  in xenvif_count_requests()
298 				netdev_dbg(queue->vif->dev,  in xenvif_count_requests()
308 			netdev_err(queue->vif->dev, "Cross page boundary, txp->offset: %u, size: %u\n",  in xenvif_count_requests()
310 			xenvif_fatal_tx_err(queue->vif);  in xenvif_count_requests()
322 		xenvif_tx_err(queue, first, extra_count, cons + slots);  in xenvif_count_requests()
340 static inline void xenvif_tx_create_map_op(struct xenvif_queue *queue,  in xenvif_tx_create_map_op()  argument
346 	queue->pages_to_map[mop-queue->tx_map_ops] = queue->mmap_pages[pending_idx];  in xenvif_tx_create_map_op()
347 	gnttab_set_map_op(mop, idx_to_kaddr(queue, pending_idx),  in xenvif_tx_create_map_op()
349 			  txp->gref, queue->vif->domid);  in xenvif_tx_create_map_op()
351 	memcpy(&queue->pending_tx_info[pending_idx].req, txp,  in xenvif_tx_create_map_op()
353 	queue->pending_tx_info[pending_idx].extra_count = extra_count;  in xenvif_tx_create_map_op()
375 static void xenvif_get_requests(struct xenvif_queue *queue,  in xenvif_get_requests()  argument
391 	struct gnttab_copy *cop = queue->tx_copy_ops + *copy_ops;  in xenvif_get_requests()
392 	struct gnttab_map_grant_ref *gop = queue->tx_map_ops + *map_ops;  in xenvif_get_requests()
407 		cop->source.domid = queue->vif->domid;  in xenvif_get_requests()
427 		index = pending_index(queue->pending_cons);  in xenvif_get_requests()
428 		pending_idx = queue->pending_ring[index];  in xenvif_get_requests()
429 		callback_param(queue, pending_idx).ctx = NULL;  in xenvif_get_requests()
440 			memcpy(&queue->pending_tx_info[pending_idx].req,  in xenvif_get_requests()
442 			queue->pending_tx_info[pending_idx].extra_count =  in xenvif_get_requests()
449 			queue->pending_cons++;  in xenvif_get_requests()
464 			make_tx_response(queue, txp, 0, XEN_NETIF_RSP_OKAY);  in xenvif_get_requests()
469 		index = pending_index(queue->pending_cons++);  in xenvif_get_requests()
470 		pending_idx = queue->pending_ring[index];  in xenvif_get_requests()
471 		xenvif_tx_create_map_op(queue, pending_idx, txp,  in xenvif_get_requests()
490 				make_tx_response(queue, txp, 0,  in xenvif_get_requests()
495 			index = pending_index(queue->pending_cons++);  in xenvif_get_requests()
496 			pending_idx = queue->pending_ring[index];  in xenvif_get_requests()
497 			xenvif_tx_create_map_op(queue, pending_idx, txp, 0,  in xenvif_get_requests()
519 	(*copy_ops) = cop - queue->tx_copy_ops;  in xenvif_get_requests()
520 	(*map_ops) = gop - queue->tx_map_ops;  in xenvif_get_requests()
523 static inline void xenvif_grant_handle_set(struct xenvif_queue *queue,  in xenvif_grant_handle_set()  argument
527 	if (unlikely(queue->grant_tx_handle[pending_idx] !=  in xenvif_grant_handle_set()
529 		netdev_err(queue->vif->dev,  in xenvif_grant_handle_set()
534 	queue->grant_tx_handle[pending_idx] = handle;  in xenvif_grant_handle_set()
537 static inline void xenvif_grant_handle_reset(struct xenvif_queue *queue,  in xenvif_grant_handle_reset()  argument
540 	if (unlikely(queue->grant_tx_handle[pending_idx] ==  in xenvif_grant_handle_reset()
542 		netdev_err(queue->vif->dev,  in xenvif_grant_handle_reset()
547 	queue->grant_tx_handle[pending_idx] = NETBACK_INVALID_HANDLE;  in xenvif_grant_handle_reset()
550 static int xenvif_tx_check_gop(struct xenvif_queue *queue,  in xenvif_tx_check_gop()  argument
588 				xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
593 				netdev_dbg(queue->vif->dev,  in xenvif_tx_check_gop()
600 				xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
616 			xenvif_grant_handle_set(queue,  in xenvif_tx_check_gop()
621 				xenvif_idx_unmap(queue, pending_idx);  in xenvif_tx_check_gop()
627 					xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
630 					xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
638 			netdev_dbg(queue->vif->dev,  in xenvif_tx_check_gop()
645 		xenvif_idx_release(queue, pending_idx, XEN_NETIF_RSP_ERROR);  in xenvif_tx_check_gop()
654 			xenvif_idx_unmap(queue, pending_idx);  in xenvif_tx_check_gop()
655 			xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
665 				xenvif_idx_unmap(queue, pending_idx);  in xenvif_tx_check_gop()
666 				xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
687 static void xenvif_fill_frags(struct xenvif_queue *queue, struct sk_buff *skb)  in xenvif_fill_frags()  argument
705 				&callback_param(queue, pending_idx);  in xenvif_fill_frags()
707 			callback_param(queue, prev_pending_idx).ctx =  in xenvif_fill_frags()
708 				&callback_param(queue, pending_idx);  in xenvif_fill_frags()
710 		callback_param(queue, pending_idx).ctx = NULL;  in xenvif_fill_frags()
713 		txp = &queue->pending_tx_info[pending_idx].req;  in xenvif_fill_frags()
714 		page = virt_to_page((void *)idx_to_kaddr(queue, pending_idx));  in xenvif_fill_frags()
721 		get_page(queue->mmap_pages[pending_idx]);  in xenvif_fill_frags()
725 static int xenvif_get_extras(struct xenvif_queue *queue,  in xenvif_get_extras()  argument
731 	RING_IDX cons = queue->tx.req_cons;  in xenvif_get_extras()
735 			netdev_err(queue->vif->dev, "Missing extra info\n");  in xenvif_get_extras()
736 			xenvif_fatal_tx_err(queue->vif);  in xenvif_get_extras()
740 		RING_COPY_REQUEST(&queue->tx, cons, &extra);  in xenvif_get_extras()
742 		queue->tx.req_cons = ++cons;  in xenvif_get_extras()
747 			netdev_err(queue->vif->dev,  in xenvif_get_extras()
749 			xenvif_fatal_tx_err(queue->vif);  in xenvif_get_extras()
788 static int checksum_setup(struct xenvif_queue *queue, struct sk_buff *skb)  in checksum_setup()  argument
798 		queue->stats.rx_gso_checksum_fixup++;  in checksum_setup()
810 static bool tx_credit_exceeded(struct xenvif_queue *queue, unsigned size)  in tx_credit_exceeded()  argument
813 	u64 next_credit = queue->credit_window_start +  in tx_credit_exceeded()
814 		msecs_to_jiffies(queue->credit_usec / 1000);  in tx_credit_exceeded()
817 	if (timer_pending(&queue->credit_timeout)) {  in tx_credit_exceeded()
818 		queue->rate_limited = true;  in tx_credit_exceeded()
824 		queue->credit_window_start = now;  in tx_credit_exceeded()
825 		tx_add_credit(queue);  in tx_credit_exceeded()
829 	if (size > queue->remaining_credit) {  in tx_credit_exceeded()
830 		mod_timer(&queue->credit_timeout,  in tx_credit_exceeded()
832 		queue->credit_window_start = next_credit;  in tx_credit_exceeded()
833 		queue->rate_limited = true;  in tx_credit_exceeded()
900 	/* No need for locking or RCU here. NAPI poll and TX queue  in xenvif_mcast_addr_list_free()
915 static void xenvif_tx_build_gops(struct xenvif_queue *queue,  in xenvif_tx_build_gops()  argument
924 	while (skb_queue_len(&queue->tx_queue) < budget) {  in xenvif_tx_build_gops()
933 		if (queue->tx.sring->req_prod - queue->tx.req_cons >  in xenvif_tx_build_gops()
935 			netdev_err(queue->vif->dev,  in xenvif_tx_build_gops()
938 				   queue->tx.sring->req_prod, queue->tx.req_cons,  in xenvif_tx_build_gops()
940 			xenvif_fatal_tx_err(queue->vif);  in xenvif_tx_build_gops()
944 		work_to_do = XEN_RING_NR_UNCONSUMED_REQUESTS(&queue->tx);  in xenvif_tx_build_gops()
948 		idx = queue->tx.req_cons;  in xenvif_tx_build_gops()
950 		RING_COPY_REQUEST(&queue->tx, idx, &txreq);  in xenvif_tx_build_gops()
953 		if (txreq.size > queue->remaining_credit &&  in xenvif_tx_build_gops()
954 		    tx_credit_exceeded(queue, txreq.size))  in xenvif_tx_build_gops()
957 		queue->remaining_credit -= txreq.size;  in xenvif_tx_build_gops()
960 		queue->tx.req_cons = ++idx;  in xenvif_tx_build_gops()
965 			work_to_do = xenvif_get_extras(queue, extras,  in xenvif_tx_build_gops()
968 			idx = queue->tx.req_cons;  in xenvif_tx_build_gops()
977 			ret = xenvif_mcast_add(queue->vif, extra->u.mcast.addr);  in xenvif_tx_build_gops()
979 			make_tx_response(queue, &txreq, extra_count,  in xenvif_tx_build_gops()
990 			xenvif_mcast_del(queue->vif, extra->u.mcast.addr);  in xenvif_tx_build_gops()
992 			make_tx_response(queue, &txreq, extra_count,  in xenvif_tx_build_gops()
1000 		ret = xenvif_count_requests(queue, &txreq, extra_count,  in xenvif_tx_build_gops()
1009 			netdev_dbg(queue->vif->dev,  in xenvif_tx_build_gops()
1011 			xenvif_tx_err(queue, &txreq, extra_count, idx);  in xenvif_tx_build_gops()
1017 			netdev_err(queue->vif->dev, "Cross page boundary, txreq.offset: %u, size: %u\n",  in xenvif_tx_build_gops()
1019 			xenvif_fatal_tx_err(queue->vif);  in xenvif_tx_build_gops()
1028 			netdev_dbg(queue->vif->dev,  in xenvif_tx_build_gops()
1030 			xenvif_tx_err(queue, &txreq, extra_count, idx);  in xenvif_tx_build_gops()
1048 				xenvif_tx_err(queue, &txreq, extra_count, idx);  in xenvif_tx_build_gops()
1050 					netdev_err(queue->vif->dev,  in xenvif_tx_build_gops()
1060 			if (xenvif_set_skb_gso(queue->vif, skb, gso)) {  in xenvif_tx_build_gops()
1096 		xenvif_get_requests(queue, skb, &txreq, txfrags, copy_ops,  in xenvif_tx_build_gops()
1100 		__skb_queue_tail(&queue->tx_queue, skb);  in xenvif_tx_build_gops()
1102 		queue->tx.req_cons = idx;  in xenvif_tx_build_gops()
1111 static int xenvif_handle_frag_list(struct xenvif_queue *queue, struct sk_buff *skb)  in xenvif_handle_frag_list()  argument
1119 	queue->stats.tx_zerocopy_sent += 2;  in xenvif_handle_frag_list()
1120 	queue->stats.tx_frag_overflow++;  in xenvif_handle_frag_list()
1122 	xenvif_fill_frags(queue, nskb);  in xenvif_handle_frag_list()
1159 	atomic_inc(&queue->inflight_packets);  in xenvif_handle_frag_list()
1171 static int xenvif_tx_submit(struct xenvif_queue *queue)  in xenvif_tx_submit()  argument
1173 	struct gnttab_map_grant_ref *gop_map = queue->tx_map_ops;  in xenvif_tx_submit()
1174 	struct gnttab_copy *gop_copy = queue->tx_copy_ops;  in xenvif_tx_submit()
1178 	while ((skb = __skb_dequeue(&queue->tx_queue)) != NULL) {  in xenvif_tx_submit()
1183 		txp = &queue->pending_tx_info[pending_idx].req;  in xenvif_tx_submit()
1186 		if (unlikely(xenvif_tx_check_gop(queue, skb, &gop_map, &gop_copy))) {  in xenvif_tx_submit()
1206 		xenvif_fill_frags(queue, skb);  in xenvif_tx_submit()
1210 			xenvif_skb_zerocopy_prepare(queue, nskb);  in xenvif_tx_submit()
1211 			if (xenvif_handle_frag_list(queue, skb)) {  in xenvif_tx_submit()
1213 					netdev_err(queue->vif->dev,  in xenvif_tx_submit()
1215 				xenvif_skb_zerocopy_prepare(queue, skb);  in xenvif_tx_submit()
1224 		skb->dev      = queue->vif->dev;  in xenvif_tx_submit()
1228 		if (checksum_setup(queue, skb)) {  in xenvif_tx_submit()
1229 			netdev_dbg(queue->vif->dev,  in xenvif_tx_submit()
1233 				xenvif_skb_zerocopy_prepare(queue, skb);  in xenvif_tx_submit()
1261 		queue->stats.rx_bytes += skb->len;  in xenvif_tx_submit()
1262 		queue->stats.rx_packets++;  in xenvif_tx_submit()
1272 			xenvif_skb_zerocopy_prepare(queue, skb);  in xenvif_tx_submit()
1273 			queue->stats.tx_zerocopy_sent++;  in xenvif_tx_submit()
1289 	struct xenvif_queue *queue = ubuf_to_queue(ubuf);  in xenvif_zerocopy_callback()  local
1294 	spin_lock_irqsave(&queue->callback_lock, flags);  in xenvif_zerocopy_callback()
1298 		BUG_ON(queue->dealloc_prod - queue->dealloc_cons >=  in xenvif_zerocopy_callback()
1300 		index = pending_index(queue->dealloc_prod);  in xenvif_zerocopy_callback()
1301 		queue->dealloc_ring[index] = pending_idx;  in xenvif_zerocopy_callback()
1306 		queue->dealloc_prod++;  in xenvif_zerocopy_callback()
1308 	spin_unlock_irqrestore(&queue->callback_lock, flags);  in xenvif_zerocopy_callback()
1311 		queue->stats.tx_zerocopy_success++;  in xenvif_zerocopy_callback()
1313 		queue->stats.tx_zerocopy_fail++;  in xenvif_zerocopy_callback()
1314 	xenvif_skb_zerocopy_complete(queue);  in xenvif_zerocopy_callback()
1321 static inline void xenvif_tx_dealloc_action(struct xenvif_queue *queue)  in xenvif_tx_dealloc_action()  argument
1328 	dc = queue->dealloc_cons;  in xenvif_tx_dealloc_action()
1329 	gop = queue->tx_unmap_ops;  in xenvif_tx_dealloc_action()
1333 		dp = queue->dealloc_prod;  in xenvif_tx_dealloc_action()
1341 			BUG_ON(gop - queue->tx_unmap_ops >= MAX_PENDING_REQS);  in xenvif_tx_dealloc_action()
1343 				queue->dealloc_ring[pending_index(dc++)];  in xenvif_tx_dealloc_action()
1345 			pending_idx_release[gop - queue->tx_unmap_ops] =  in xenvif_tx_dealloc_action()
1347 			queue->pages_to_unmap[gop - queue->tx_unmap_ops] =  in xenvif_tx_dealloc_action()
1348 				queue->mmap_pages[pending_idx];  in xenvif_tx_dealloc_action()
1350 					    idx_to_kaddr(queue, pending_idx),  in xenvif_tx_dealloc_action()
1352 					    queue->grant_tx_handle[pending_idx]);  in xenvif_tx_dealloc_action()
1353 			xenvif_grant_handle_reset(queue, pending_idx);  in xenvif_tx_dealloc_action()
1357 	} while (dp != queue->dealloc_prod);  in xenvif_tx_dealloc_action()
1359 	queue->dealloc_cons = dc;  in xenvif_tx_dealloc_action()
1361 	if (gop - queue->tx_unmap_ops > 0) {  in xenvif_tx_dealloc_action()
1363 		ret = gnttab_unmap_refs(queue->tx_unmap_ops,  in xenvif_tx_dealloc_action()
1365 					queue->pages_to_unmap,  in xenvif_tx_dealloc_action()
1366 					gop - queue->tx_unmap_ops);  in xenvif_tx_dealloc_action()
1368 			netdev_err(queue->vif->dev, "Unmap fail: nr_ops %tu ret %d\n",  in xenvif_tx_dealloc_action()
1369 				   gop - queue->tx_unmap_ops, ret);  in xenvif_tx_dealloc_action()
1370 			for (i = 0; i < gop - queue->tx_unmap_ops; ++i) {  in xenvif_tx_dealloc_action()
1372 					netdev_err(queue->vif->dev,  in xenvif_tx_dealloc_action()
1382 	for (i = 0; i < gop - queue->tx_unmap_ops; ++i)  in xenvif_tx_dealloc_action()
1383 		xenvif_idx_release(queue, pending_idx_release[i],  in xenvif_tx_dealloc_action()
1389 int xenvif_tx_action(struct xenvif_queue *queue, int budget)  in xenvif_tx_action()  argument
1394 	if (unlikely(!tx_work_todo(queue)))  in xenvif_tx_action()
1397 	xenvif_tx_build_gops(queue, budget, &nr_cops, &nr_mops);  in xenvif_tx_action()
1402 	gnttab_batch_copy(queue->tx_copy_ops, nr_cops);  in xenvif_tx_action()
1404 		ret = gnttab_map_refs(queue->tx_map_ops,  in xenvif_tx_action()
1406 				      queue->pages_to_map,  in xenvif_tx_action()
1411 			netdev_err(queue->vif->dev, "Map fail: nr %u ret %d\n",  in xenvif_tx_action()
1414 				WARN_ON_ONCE(queue->tx_map_ops[i].status ==  in xenvif_tx_action()
1419 	work_done = xenvif_tx_submit(queue);  in xenvif_tx_action()
1424 static void _make_tx_response(struct xenvif_queue *queue,  in _make_tx_response()  argument
1429 	RING_IDX i = queue->tx.rsp_prod_pvt;  in _make_tx_response()
1432 	resp = RING_GET_RESPONSE(&queue->tx, i);  in _make_tx_response()
1437 		RING_GET_RESPONSE(&queue->tx, ++i)->status = XEN_NETIF_RSP_NULL;  in _make_tx_response()
1439 	queue->tx.rsp_prod_pvt = ++i;  in _make_tx_response()
1442 static void push_tx_responses(struct xenvif_queue *queue)  in push_tx_responses()  argument
1446 	RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&queue->tx, notify);  in push_tx_responses()
1448 		notify_remote_via_irq(queue->tx_irq);  in push_tx_responses()
1451 static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,  in xenvif_idx_release()  argument
1458 	pending_tx_info = &queue->pending_tx_info[pending_idx];  in xenvif_idx_release()
1460 	spin_lock_irqsave(&queue->response_lock, flags);  in xenvif_idx_release()
1462 	_make_tx_response(queue, &pending_tx_info->req,  in xenvif_idx_release()
1469 	index = pending_index(queue->pending_prod++);  in xenvif_idx_release()
1470 	queue->pending_ring[index] = pending_idx;  in xenvif_idx_release()
1472 	push_tx_responses(queue);  in xenvif_idx_release()
1474 	spin_unlock_irqrestore(&queue->response_lock, flags);  in xenvif_idx_release()
1477 static void make_tx_response(struct xenvif_queue *queue,  in make_tx_response()  argument
1484 	spin_lock_irqsave(&queue->response_lock, flags);  in make_tx_response()
1486 	_make_tx_response(queue, txp, extra_count, status);  in make_tx_response()
1487 	push_tx_responses(queue);  in make_tx_response()
1489 	spin_unlock_irqrestore(&queue->response_lock, flags);  in make_tx_response()
1492 static void xenvif_idx_unmap(struct xenvif_queue *queue, u16 pending_idx)  in xenvif_idx_unmap()  argument
1498 			    idx_to_kaddr(queue, pending_idx),  in xenvif_idx_unmap()
1500 			    queue->grant_tx_handle[pending_idx]);  in xenvif_idx_unmap()
1501 	xenvif_grant_handle_reset(queue, pending_idx);  in xenvif_idx_unmap()
1504 				&queue->mmap_pages[pending_idx], 1);  in xenvif_idx_unmap()
1506 		netdev_err(queue->vif->dev,  in xenvif_idx_unmap()
1517 static inline int tx_work_todo(struct xenvif_queue *queue)  in tx_work_todo()  argument
1519 	if (likely(RING_HAS_UNCONSUMED_REQUESTS(&queue->tx)))  in tx_work_todo()
1525 static inline bool tx_dealloc_work_todo(struct xenvif_queue *queue)  in tx_dealloc_work_todo()  argument
1527 	return queue->dealloc_cons != queue->dealloc_prod;  in tx_dealloc_work_todo()
1530 void xenvif_unmap_frontend_data_rings(struct xenvif_queue *queue)  in xenvif_unmap_frontend_data_rings()  argument
1532 	if (queue->tx.sring)  in xenvif_unmap_frontend_data_rings()
1533 		xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(queue->vif),  in xenvif_unmap_frontend_data_rings()
1534 					queue->tx.sring);  in xenvif_unmap_frontend_data_rings()
1535 	if (queue->rx.sring)  in xenvif_unmap_frontend_data_rings()
1536 		xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(queue->vif),  in xenvif_unmap_frontend_data_rings()
1537 					queue->rx.sring);  in xenvif_unmap_frontend_data_rings()
1540 int xenvif_map_frontend_data_rings(struct xenvif_queue *queue,  in xenvif_map_frontend_data_rings()  argument
1550 	err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(queue->vif),  in xenvif_map_frontend_data_rings()
1559 	BACK_RING_ATTACH(&queue->tx, txs, rsp_prod, XEN_PAGE_SIZE);  in xenvif_map_frontend_data_rings()
1562 	if (req_prod - rsp_prod > RING_SIZE(&queue->tx))  in xenvif_map_frontend_data_rings()
1565 	err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(queue->vif),  in xenvif_map_frontend_data_rings()
1574 	BACK_RING_ATTACH(&queue->rx, rxs, rsp_prod, XEN_PAGE_SIZE);  in xenvif_map_frontend_data_rings()
1577 	if (req_prod - rsp_prod > RING_SIZE(&queue->rx))  in xenvif_map_frontend_data_rings()
1583 	xenvif_unmap_frontend_data_rings(queue);  in xenvif_map_frontend_data_rings()
1587 static bool xenvif_dealloc_kthread_should_stop(struct xenvif_queue *queue)  in xenvif_dealloc_kthread_should_stop()  argument
1593 		!atomic_read(&queue->inflight_packets);  in xenvif_dealloc_kthread_should_stop()
1598 	struct xenvif_queue *queue = data;  in xenvif_dealloc_kthread()  local
1601 		wait_event_interruptible(queue->dealloc_wq,  in xenvif_dealloc_kthread()
1602 					 tx_dealloc_work_todo(queue) ||  in xenvif_dealloc_kthread()
1603 					 xenvif_dealloc_kthread_should_stop(queue));  in xenvif_dealloc_kthread()
1604 		if (xenvif_dealloc_kthread_should_stop(queue))  in xenvif_dealloc_kthread()
1607 		xenvif_tx_dealloc_action(queue);  in xenvif_dealloc_kthread()
1612 	if (tx_dealloc_work_todo(queue))  in xenvif_dealloc_kthread()
1613 		xenvif_tx_dealloc_action(queue);  in xenvif_dealloc_kthread()