99 static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,
102 static void make_tx_response(struct xenvif_queue *queue,
106 static void push_tx_responses(struct xenvif_queue *queue);
108 static inline int tx_work_todo(struct xenvif_queue *queue);
110 static inline unsigned long idx_to_pfn(struct xenvif_queue *queue,  in idx_to_pfn()  argument
113 	return page_to_pfn(queue->mmap_pages[idx]);  in idx_to_pfn()
116 static inline unsigned long idx_to_kaddr(struct xenvif_queue *queue,  in idx_to_kaddr()  argument
119 	return (unsigned long)pfn_to_kaddr(idx_to_pfn(queue, idx));  in idx_to_kaddr()
152 void xenvif_kick_thread(struct xenvif_queue *queue)  in xenvif_kick_thread()  argument
154 	wake_up(&queue->wq);  in xenvif_kick_thread()
157 void xenvif_napi_schedule_or_enable_events(struct xenvif_queue *queue)  in xenvif_napi_schedule_or_enable_events()  argument
161 	RING_FINAL_CHECK_FOR_REQUESTS(&queue->tx, more_to_do);  in xenvif_napi_schedule_or_enable_events()
164 		napi_schedule(&queue->napi);  in xenvif_napi_schedule_or_enable_events()
167 static void tx_add_credit(struct xenvif_queue *queue)  in tx_add_credit()  argument
175 	max_burst = max(131072UL, queue->credit_bytes);  in tx_add_credit()
178 	max_credit = queue->remaining_credit + queue->credit_bytes;  in tx_add_credit()
179 	if (max_credit < queue->remaining_credit)  in tx_add_credit()
182 	queue->remaining_credit = min(max_credit, max_burst);  in tx_add_credit()
183 	queue->rate_limited = false;  in tx_add_credit()
188 	struct xenvif_queue *queue = from_timer(queue, t, credit_timeout);  in xenvif_tx_credit_callback()  local
189 	tx_add_credit(queue);  in xenvif_tx_credit_callback()
190 	xenvif_napi_schedule_or_enable_events(queue);  in xenvif_tx_credit_callback()
193 static void xenvif_tx_err(struct xenvif_queue *queue,  in xenvif_tx_err()  argument
197 	RING_IDX cons = queue->tx.req_cons;  in xenvif_tx_err()
201 		spin_lock_irqsave(&queue->response_lock, flags);  in xenvif_tx_err()
202 		make_tx_response(queue, txp, extra_count, XEN_NETIF_RSP_ERROR);  in xenvif_tx_err()
203 		push_tx_responses(queue);  in xenvif_tx_err()
204 		spin_unlock_irqrestore(&queue->response_lock, flags);  in xenvif_tx_err()
207 		RING_COPY_REQUEST(&queue->tx, cons++, txp);  in xenvif_tx_err()
210 	queue->tx.req_cons = cons;  in xenvif_tx_err()
222 static int xenvif_count_requests(struct xenvif_queue *queue,  in xenvif_count_requests()  argument
228 	RING_IDX cons = queue->tx.req_cons;  in xenvif_count_requests()
240 			netdev_err(queue->vif->dev,  in xenvif_count_requests()
243 			xenvif_fatal_tx_err(queue->vif);  in xenvif_count_requests()
251 			netdev_err(queue->vif->dev,  in xenvif_count_requests()
254 			xenvif_fatal_tx_err(queue->vif);  in xenvif_count_requests()
267 				netdev_dbg(queue->vif->dev,  in xenvif_count_requests()
276 		RING_COPY_REQUEST(&queue->tx, cons + slots, txp);  in xenvif_count_requests()
289 				netdev_dbg(queue->vif->dev,  in xenvif_count_requests()
299 			netdev_err(queue->vif->dev, "Cross page boundary, txp->offset: %u, size: %u\n",  in xenvif_count_requests()
301 			xenvif_fatal_tx_err(queue->vif);  in xenvif_count_requests()
313 		xenvif_tx_err(queue, first, extra_count, cons + slots);  in xenvif_count_requests()
327 static inline void xenvif_tx_create_map_op(struct xenvif_queue *queue,  in xenvif_tx_create_map_op()  argument
333 	queue->pages_to_map[mop-queue->tx_map_ops] = queue->mmap_pages[pending_idx];  in xenvif_tx_create_map_op()
334 	gnttab_set_map_op(mop, idx_to_kaddr(queue, pending_idx),  in xenvif_tx_create_map_op()
336 			  txp->gref, queue->vif->domid);  in xenvif_tx_create_map_op()
338 	memcpy(&queue->pending_tx_info[pending_idx].req, txp,  in xenvif_tx_create_map_op()
340 	queue->pending_tx_info[pending_idx].extra_count = extra_count;  in xenvif_tx_create_map_op()
360 static struct gnttab_map_grant_ref *xenvif_get_requests(struct xenvif_queue *queue,  in xenvif_get_requests()  argument
381 		index = pending_index(queue->pending_cons++);  in xenvif_get_requests()
382 		pending_idx = queue->pending_ring[index];  in xenvif_get_requests()
383 		xenvif_tx_create_map_op(queue, pending_idx, txp, 0, gop);  in xenvif_get_requests()
394 			index = pending_index(queue->pending_cons++);  in xenvif_get_requests()
395 			pending_idx = queue->pending_ring[index];  in xenvif_get_requests()
396 			xenvif_tx_create_map_op(queue, pending_idx, txp, 0,  in xenvif_get_requests()
408 static inline void xenvif_grant_handle_set(struct xenvif_queue *queue,  in xenvif_grant_handle_set()  argument
412 	if (unlikely(queue->grant_tx_handle[pending_idx] !=  in xenvif_grant_handle_set()
414 		netdev_err(queue->vif->dev,  in xenvif_grant_handle_set()
419 	queue->grant_tx_handle[pending_idx] = handle;  in xenvif_grant_handle_set()
422 static inline void xenvif_grant_handle_reset(struct xenvif_queue *queue,  in xenvif_grant_handle_reset()  argument
425 	if (unlikely(queue->grant_tx_handle[pending_idx] ==  in xenvif_grant_handle_reset()
427 		netdev_err(queue->vif->dev,  in xenvif_grant_handle_reset()
432 	queue->grant_tx_handle[pending_idx] = NETBACK_INVALID_HANDLE;  in xenvif_grant_handle_reset()
435 static int xenvif_tx_check_gop(struct xenvif_queue *queue,  in xenvif_tx_check_gop()  argument
459 			netdev_dbg(queue->vif->dev,  in xenvif_tx_check_gop()
466 			xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
481 			xenvif_grant_handle_set(queue,  in xenvif_tx_check_gop()
486 				xenvif_idx_unmap(queue, pending_idx);  in xenvif_tx_check_gop()
492 					xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
495 					xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
503 			netdev_dbg(queue->vif->dev,  in xenvif_tx_check_gop()
510 		xenvif_idx_release(queue, pending_idx, XEN_NETIF_RSP_ERROR);  in xenvif_tx_check_gop()
520 			xenvif_idx_release(queue,  in xenvif_tx_check_gop()
527 			xenvif_idx_unmap(queue, pending_idx);  in xenvif_tx_check_gop()
528 			xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
538 				xenvif_idx_unmap(queue, pending_idx);  in xenvif_tx_check_gop()
539 				xenvif_idx_release(queue, pending_idx,  in xenvif_tx_check_gop()
560 static void xenvif_fill_frags(struct xenvif_queue *queue, struct sk_buff *skb)  in xenvif_fill_frags()  argument
578 				&callback_param(queue, pending_idx);  in xenvif_fill_frags()
580 			callback_param(queue, prev_pending_idx).ctx =  in xenvif_fill_frags()
581 				&callback_param(queue, pending_idx);  in xenvif_fill_frags()
583 		callback_param(queue, pending_idx).ctx = NULL;  in xenvif_fill_frags()
586 		txp = &queue->pending_tx_info[pending_idx].req;  in xenvif_fill_frags()
587 		page = virt_to_page(idx_to_kaddr(queue, pending_idx));  in xenvif_fill_frags()
594 		get_page(queue->mmap_pages[pending_idx]);  in xenvif_fill_frags()
598 static int xenvif_get_extras(struct xenvif_queue *queue,  in xenvif_get_extras()  argument
604 	RING_IDX cons = queue->tx.req_cons;  in xenvif_get_extras()
608 			netdev_err(queue->vif->dev, "Missing extra info\n");  in xenvif_get_extras()
609 			xenvif_fatal_tx_err(queue->vif);  in xenvif_get_extras()
613 		RING_COPY_REQUEST(&queue->tx, cons, &extra);  in xenvif_get_extras()
615 		queue->tx.req_cons = ++cons;  in xenvif_get_extras()
620 			netdev_err(queue->vif->dev,  in xenvif_get_extras()
622 			xenvif_fatal_tx_err(queue->vif);  in xenvif_get_extras()
661 static int checksum_setup(struct xenvif_queue *queue, struct sk_buff *skb)  in checksum_setup()  argument
671 		queue->stats.rx_gso_checksum_fixup++;  in checksum_setup()
683 static bool tx_credit_exceeded(struct xenvif_queue *queue, unsigned size)  in tx_credit_exceeded()  argument
686 	u64 next_credit = queue->credit_window_start +  in tx_credit_exceeded()
687 		msecs_to_jiffies(queue->credit_usec / 1000);  in tx_credit_exceeded()
690 	if (timer_pending(&queue->credit_timeout)) {  in tx_credit_exceeded()
691 		queue->rate_limited = true;  in tx_credit_exceeded()
697 		queue->credit_window_start = now;  in tx_credit_exceeded()
698 		tx_add_credit(queue);  in tx_credit_exceeded()
702 	if (size > queue->remaining_credit) {  in tx_credit_exceeded()
703 		mod_timer(&queue->credit_timeout,  in tx_credit_exceeded()
705 		queue->credit_window_start = next_credit;  in tx_credit_exceeded()
706 		queue->rate_limited = true;  in tx_credit_exceeded()
788 static void xenvif_tx_build_gops(struct xenvif_queue *queue,  in xenvif_tx_build_gops()  argument
793 	struct gnttab_map_grant_ref *gop = queue->tx_map_ops;  in xenvif_tx_build_gops()
798 	while (skb_queue_len(&queue->tx_queue) < budget) {  in xenvif_tx_build_gops()
809 		if (queue->tx.sring->req_prod - queue->tx.req_cons >  in xenvif_tx_build_gops()
811 			netdev_err(queue->vif->dev,  in xenvif_tx_build_gops()
814 				   queue->tx.sring->req_prod, queue->tx.req_cons,  in xenvif_tx_build_gops()
816 			xenvif_fatal_tx_err(queue->vif);  in xenvif_tx_build_gops()
820 		work_to_do = RING_HAS_UNCONSUMED_REQUESTS(&queue->tx);  in xenvif_tx_build_gops()
824 		idx = queue->tx.req_cons;  in xenvif_tx_build_gops()
826 		RING_COPY_REQUEST(&queue->tx, idx, &txreq);  in xenvif_tx_build_gops()
829 		if (txreq.size > queue->remaining_credit &&  in xenvif_tx_build_gops()
830 		    tx_credit_exceeded(queue, txreq.size))  in xenvif_tx_build_gops()
833 		queue->remaining_credit -= txreq.size;  in xenvif_tx_build_gops()
836 		queue->tx.req_cons = ++idx;  in xenvif_tx_build_gops()
841 			work_to_do = xenvif_get_extras(queue, extras,  in xenvif_tx_build_gops()
844 			idx = queue->tx.req_cons;  in xenvif_tx_build_gops()
853 			ret = xenvif_mcast_add(queue->vif, extra->u.mcast.addr);  in xenvif_tx_build_gops()
855 			make_tx_response(queue, &txreq, extra_count,  in xenvif_tx_build_gops()
859 			push_tx_responses(queue);  in xenvif_tx_build_gops()
867 			xenvif_mcast_del(queue->vif, extra->u.mcast.addr);  in xenvif_tx_build_gops()
869 			make_tx_response(queue, &txreq, extra_count,  in xenvif_tx_build_gops()
871 			push_tx_responses(queue);  in xenvif_tx_build_gops()
875 		ret = xenvif_count_requests(queue, &txreq, extra_count,  in xenvif_tx_build_gops()
883 			netdev_dbg(queue->vif->dev,  in xenvif_tx_build_gops()
885 			xenvif_tx_err(queue, &txreq, extra_count, idx);  in xenvif_tx_build_gops()
891 			netdev_err(queue->vif->dev,  in xenvif_tx_build_gops()
895 			xenvif_fatal_tx_err(queue->vif);  in xenvif_tx_build_gops()
899 		index = pending_index(queue->pending_cons);  in xenvif_tx_build_gops()
900 		pending_idx = queue->pending_ring[index];  in xenvif_tx_build_gops()
908 			netdev_dbg(queue->vif->dev,  in xenvif_tx_build_gops()
910 			xenvif_tx_err(queue, &txreq, extra_count, idx);  in xenvif_tx_build_gops()
929 				xenvif_tx_err(queue, &txreq, extra_count, idx);  in xenvif_tx_build_gops()
931 					netdev_err(queue->vif->dev,  in xenvif_tx_build_gops()
941 			if (xenvif_set_skb_gso(queue->vif, skb, gso)) {  in xenvif_tx_build_gops()
979 		queue->tx_copy_ops[*copy_ops].source.u.ref = txreq.gref;  in xenvif_tx_build_gops()
980 		queue->tx_copy_ops[*copy_ops].source.domid = queue->vif->domid;  in xenvif_tx_build_gops()
981 		queue->tx_copy_ops[*copy_ops].source.offset = txreq.offset;  in xenvif_tx_build_gops()
983 		queue->tx_copy_ops[*copy_ops].dest.u.gmfn =  in xenvif_tx_build_gops()
985 		queue->tx_copy_ops[*copy_ops].dest.domid = DOMID_SELF;  in xenvif_tx_build_gops()
986 		queue->tx_copy_ops[*copy_ops].dest.offset =  in xenvif_tx_build_gops()
989 		queue->tx_copy_ops[*copy_ops].len = data_len;  in xenvif_tx_build_gops()
990 		queue->tx_copy_ops[*copy_ops].flags = GNTCOPY_source_gref;  in xenvif_tx_build_gops()
997 			xenvif_tx_create_map_op(queue, pending_idx, &txreq,  in xenvif_tx_build_gops()
1003 			memcpy(&queue->pending_tx_info[pending_idx].req,  in xenvif_tx_build_gops()
1005 			queue->pending_tx_info[pending_idx].extra_count =  in xenvif_tx_build_gops()
1009 		queue->pending_cons++;  in xenvif_tx_build_gops()
1011 		gop = xenvif_get_requests(queue, skb, txfrags, gop,  in xenvif_tx_build_gops()
1014 		__skb_queue_tail(&queue->tx_queue, skb);  in xenvif_tx_build_gops()
1016 		queue->tx.req_cons = idx;  in xenvif_tx_build_gops()
1018 		if (((gop-queue->tx_map_ops) >= ARRAY_SIZE(queue->tx_map_ops)) ||  in xenvif_tx_build_gops()
1019 		    (*copy_ops >= ARRAY_SIZE(queue->tx_copy_ops)))  in xenvif_tx_build_gops()
1023 	(*map_ops) = gop - queue->tx_map_ops;  in xenvif_tx_build_gops()
1030 static int xenvif_handle_frag_list(struct xenvif_queue *queue, struct sk_buff *skb)  in xenvif_handle_frag_list()  argument
1038 	queue->stats.tx_zerocopy_sent += 2;  in xenvif_handle_frag_list()
1039 	queue->stats.tx_frag_overflow++;  in xenvif_handle_frag_list()
1041 	xenvif_fill_frags(queue, nskb);  in xenvif_handle_frag_list()
1077 	xenvif_skb_zerocopy_prepare(queue, nskb);  in xenvif_handle_frag_list()
1085 	atomic_inc(&queue->inflight_packets);  in xenvif_handle_frag_list()
1097 static int xenvif_tx_submit(struct xenvif_queue *queue)  in xenvif_tx_submit()  argument
1099 	struct gnttab_map_grant_ref *gop_map = queue->tx_map_ops;  in xenvif_tx_submit()
1100 	struct gnttab_copy *gop_copy = queue->tx_copy_ops;  in xenvif_tx_submit()
1104 	while ((skb = __skb_dequeue(&queue->tx_queue)) != NULL) {  in xenvif_tx_submit()
1110 		txp = &queue->pending_tx_info[pending_idx].req;  in xenvif_tx_submit()
1113 		if (unlikely(xenvif_tx_check_gop(queue, skb, &gop_map, &gop_copy))) {  in xenvif_tx_submit()
1129 		callback_param(queue, pending_idx).ctx = NULL;  in xenvif_tx_submit()
1136 			xenvif_idx_release(queue, pending_idx,  in xenvif_tx_submit()
1145 		xenvif_fill_frags(queue, skb);  in xenvif_tx_submit()
1148 			if (xenvif_handle_frag_list(queue, skb)) {  in xenvif_tx_submit()
1150 					netdev_err(queue->vif->dev,  in xenvif_tx_submit()
1152 				xenvif_skb_zerocopy_prepare(queue, skb);  in xenvif_tx_submit()
1158 		skb->dev      = queue->vif->dev;  in xenvif_tx_submit()
1162 		if (checksum_setup(queue, skb)) {  in xenvif_tx_submit()
1163 			netdev_dbg(queue->vif->dev,  in xenvif_tx_submit()
1167 				xenvif_skb_zerocopy_prepare(queue, skb);  in xenvif_tx_submit()
1188 		queue->stats.rx_bytes += skb->len;  in xenvif_tx_submit()
1189 		queue->stats.rx_packets++;  in xenvif_tx_submit()
1199 			xenvif_skb_zerocopy_prepare(queue, skb);  in xenvif_tx_submit()
1200 			queue->stats.tx_zerocopy_sent++;  in xenvif_tx_submit()
1213 	struct xenvif_queue *queue = ubuf_to_queue(ubuf);  in xenvif_zerocopy_callback()  local
1218 	spin_lock_irqsave(&queue->callback_lock, flags);  in xenvif_zerocopy_callback()
1222 		BUG_ON(queue->dealloc_prod - queue->dealloc_cons >=  in xenvif_zerocopy_callback()
1224 		index = pending_index(queue->dealloc_prod);  in xenvif_zerocopy_callback()
1225 		queue->dealloc_ring[index] = pending_idx;  in xenvif_zerocopy_callback()
1230 		queue->dealloc_prod++;  in xenvif_zerocopy_callback()
1232 	spin_unlock_irqrestore(&queue->callback_lock, flags);  in xenvif_zerocopy_callback()
1235 		queue->stats.tx_zerocopy_success++;  in xenvif_zerocopy_callback()
1237 		queue->stats.tx_zerocopy_fail++;  in xenvif_zerocopy_callback()
1238 	xenvif_skb_zerocopy_complete(queue);  in xenvif_zerocopy_callback()
1241 static inline void xenvif_tx_dealloc_action(struct xenvif_queue *queue)  in xenvif_tx_dealloc_action()  argument
1248 	dc = queue->dealloc_cons;  in xenvif_tx_dealloc_action()
1249 	gop = queue->tx_unmap_ops;  in xenvif_tx_dealloc_action()
1253 		dp = queue->dealloc_prod;  in xenvif_tx_dealloc_action()
1261 			BUG_ON(gop - queue->tx_unmap_ops >= MAX_PENDING_REQS);  in xenvif_tx_dealloc_action()
1263 				queue->dealloc_ring[pending_index(dc++)];  in xenvif_tx_dealloc_action()
1265 			pending_idx_release[gop - queue->tx_unmap_ops] =  in xenvif_tx_dealloc_action()
1267 			queue->pages_to_unmap[gop - queue->tx_unmap_ops] =  in xenvif_tx_dealloc_action()
1268 				queue->mmap_pages[pending_idx];  in xenvif_tx_dealloc_action()
1270 					    idx_to_kaddr(queue, pending_idx),  in xenvif_tx_dealloc_action()
1272 					    queue->grant_tx_handle[pending_idx]);  in xenvif_tx_dealloc_action()
1273 			xenvif_grant_handle_reset(queue, pending_idx);  in xenvif_tx_dealloc_action()
1277 	} while (dp != queue->dealloc_prod);  in xenvif_tx_dealloc_action()
1279 	queue->dealloc_cons = dc;  in xenvif_tx_dealloc_action()
1281 	if (gop - queue->tx_unmap_ops > 0) {  in xenvif_tx_dealloc_action()
1283 		ret = gnttab_unmap_refs(queue->tx_unmap_ops,  in xenvif_tx_dealloc_action()
1285 					queue->pages_to_unmap,  in xenvif_tx_dealloc_action()
1286 					gop - queue->tx_unmap_ops);  in xenvif_tx_dealloc_action()
1288 			netdev_err(queue->vif->dev, "Unmap fail: nr_ops %tu ret %d\n",  in xenvif_tx_dealloc_action()
1289 				   gop - queue->tx_unmap_ops, ret);  in xenvif_tx_dealloc_action()
1290 			for (i = 0; i < gop - queue->tx_unmap_ops; ++i) {  in xenvif_tx_dealloc_action()
1292 					netdev_err(queue->vif->dev,  in xenvif_tx_dealloc_action()
1302 	for (i = 0; i < gop - queue->tx_unmap_ops; ++i)  in xenvif_tx_dealloc_action()
1303 		xenvif_idx_release(queue, pending_idx_release[i],  in xenvif_tx_dealloc_action()
1309 int xenvif_tx_action(struct xenvif_queue *queue, int budget)  in xenvif_tx_action()  argument
1314 	if (unlikely(!tx_work_todo(queue)))  in xenvif_tx_action()
1317 	xenvif_tx_build_gops(queue, budget, &nr_cops, &nr_mops);  in xenvif_tx_action()
1322 	gnttab_batch_copy(queue->tx_copy_ops, nr_cops);  in xenvif_tx_action()
1324 		ret = gnttab_map_refs(queue->tx_map_ops,  in xenvif_tx_action()
1326 				      queue->pages_to_map,  in xenvif_tx_action()
1331 	work_done = xenvif_tx_submit(queue);  in xenvif_tx_action()
1336 static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,  in xenvif_idx_release()  argument
1343 	pending_tx_info = &queue->pending_tx_info[pending_idx];  in xenvif_idx_release()
1345 	spin_lock_irqsave(&queue->response_lock, flags);  in xenvif_idx_release()
1347 	make_tx_response(queue, &pending_tx_info->req,  in xenvif_idx_release()
1354 	index = pending_index(queue->pending_prod++);  in xenvif_idx_release()
1355 	queue->pending_ring[index] = pending_idx;  in xenvif_idx_release()
1357 	push_tx_responses(queue);  in xenvif_idx_release()
1359 	spin_unlock_irqrestore(&queue->response_lock, flags);  in xenvif_idx_release()
1363 static void make_tx_response(struct xenvif_queue *queue,  in make_tx_response()  argument
1368 	RING_IDX i = queue->tx.rsp_prod_pvt;  in make_tx_response()
1371 	resp = RING_GET_RESPONSE(&queue->tx, i);  in make_tx_response()
1376 		RING_GET_RESPONSE(&queue->tx, ++i)->status = XEN_NETIF_RSP_NULL;  in make_tx_response()
1378 	queue->tx.rsp_prod_pvt = ++i;  in make_tx_response()
1381 static void push_tx_responses(struct xenvif_queue *queue)  in push_tx_responses()  argument
1385 	RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&queue->tx, notify);  in push_tx_responses()
1387 		notify_remote_via_irq(queue->tx_irq);  in push_tx_responses()
1390 void xenvif_idx_unmap(struct xenvif_queue *queue, u16 pending_idx)  in xenvif_idx_unmap()  argument
1396 			    idx_to_kaddr(queue, pending_idx),  in xenvif_idx_unmap()
1398 			    queue->grant_tx_handle[pending_idx]);  in xenvif_idx_unmap()
1399 	xenvif_grant_handle_reset(queue, pending_idx);  in xenvif_idx_unmap()
1402 				&queue->mmap_pages[pending_idx], 1);  in xenvif_idx_unmap()
1404 		netdev_err(queue->vif->dev,  in xenvif_idx_unmap()
1415 static inline int tx_work_todo(struct xenvif_queue *queue)  in tx_work_todo()  argument
1417 	if (likely(RING_HAS_UNCONSUMED_REQUESTS(&queue->tx)))  in tx_work_todo()
1423 static inline bool tx_dealloc_work_todo(struct xenvif_queue *queue)  in tx_dealloc_work_todo()  argument
1425 	return queue->dealloc_cons != queue->dealloc_prod;  in tx_dealloc_work_todo()
1428 void xenvif_unmap_frontend_data_rings(struct xenvif_queue *queue)  in xenvif_unmap_frontend_data_rings()  argument
1430 	if (queue->tx.sring)  in xenvif_unmap_frontend_data_rings()
1431 		xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(queue->vif),  in xenvif_unmap_frontend_data_rings()
1432 					queue->tx.sring);  in xenvif_unmap_frontend_data_rings()
1433 	if (queue->rx.sring)  in xenvif_unmap_frontend_data_rings()
1434 		xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(queue->vif),  in xenvif_unmap_frontend_data_rings()
1435 					queue->rx.sring);  in xenvif_unmap_frontend_data_rings()
1438 int xenvif_map_frontend_data_rings(struct xenvif_queue *queue,  in xenvif_map_frontend_data_rings()  argument
1448 	err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(queue->vif),  in xenvif_map_frontend_data_rings()
1454 	BACK_RING_INIT(&queue->tx, txs, XEN_PAGE_SIZE);  in xenvif_map_frontend_data_rings()
1456 	err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(queue->vif),  in xenvif_map_frontend_data_rings()
1462 	BACK_RING_INIT(&queue->rx, rxs, XEN_PAGE_SIZE);  in xenvif_map_frontend_data_rings()
1467 	xenvif_unmap_frontend_data_rings(queue);  in xenvif_map_frontend_data_rings()
1471 static bool xenvif_dealloc_kthread_should_stop(struct xenvif_queue *queue)  in xenvif_dealloc_kthread_should_stop()  argument
1477 		!atomic_read(&queue->inflight_packets);  in xenvif_dealloc_kthread_should_stop()
1482 	struct xenvif_queue *queue = data;  in xenvif_dealloc_kthread()  local
1485 		wait_event_interruptible(queue->dealloc_wq,  in xenvif_dealloc_kthread()
1486 					 tx_dealloc_work_todo(queue) ||  in xenvif_dealloc_kthread()
1487 					 xenvif_dealloc_kthread_should_stop(queue));  in xenvif_dealloc_kthread()
1488 		if (xenvif_dealloc_kthread_should_stop(queue))  in xenvif_dealloc_kthread()
1491 		xenvif_tx_dealloc_action(queue);  in xenvif_dealloc_kthread()
1496 	if (tx_dealloc_work_todo(queue))  in xenvif_dealloc_kthread()
1497 		xenvif_tx_dealloc_action(queue);  in xenvif_dealloc_kthread()