net/xen-netback/interface.c

70 static int xenvif_schedulable(struct xenvif *vif)
72 	return netif_running(vif->dev) &&
73 		test_bit(VIF_STATUS_CONNECTED, &vif->status) &&
74 		!vif->disabled;
109 	/* This vif is rogue, we pretend we've there is nothing to do
110 	 * for this vif to deschedule it from NAPI. But this interface
113 	if (unlikely(queue->vif->disabled)) {
181 	struct xenvif *vif = netdev_priv(dev);
182 	unsigned int size = vif->hash.size;
187 	num_queues = READ_ONCE(vif->num_queues);
191 	if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE)
195 	xenvif_set_skb_hash(vif, skb);
200 	return vif->hash.mapping[vif->hash.mapping_sel]
207 	struct xenvif *vif = netdev_priv(dev);
219 	num_queues = READ_ONCE(vif->num_queues);
227 				    index, vif->dev->name);
230 	queue = &vif->queues[index];
235 	    !xenvif_schedulable(vif))
238 	if (vif->multicast_control && skb->pkt_type == PACKET_MULTICAST) {
241 		if (!xenvif_mcast_match(vif, eth->h_dest))
246 	cb->expires = jiffies + vif->drain_timeout;
252 	if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE)
266 	vif->dev->stats.tx_dropped++;
273 	struct xenvif *vif = netdev_priv(dev);
283 	num_queues = READ_ONCE(vif->num_queues);
287 		queue = &vif->queues[index];
296 	vif->dev->stats.rx_bytes = rx_bytes;
297 	vif->dev->stats.rx_packets = rx_packets;
298 	vif->dev->stats.tx_bytes = tx_bytes;
299 	vif->dev->stats.tx_packets = tx_packets;
301 	return &vif->dev->stats;
304 static void xenvif_up(struct xenvif *vif)
307 	unsigned int num_queues = vif->num_queues;
311 		queue = &vif->queues[queue_index];
320 static void xenvif_down(struct xenvif *vif)
323 	unsigned int num_queues = vif->num_queues;
327 		queue = &vif->queues[queue_index];
338 	struct xenvif *vif = netdev_priv(dev);
339 	if (test_bit(VIF_STATUS_CONNECTED, &vif->status))
340 		xenvif_up(vif);
347 	struct xenvif *vif = netdev_priv(dev);
348 	if (test_bit(VIF_STATUS_CONNECTED, &vif->status))
349 		xenvif_down(vif);
356 	struct xenvif *vif = netdev_priv(dev);
357 	int max = vif->can_sg ? ETH_MAX_MTU - VLAN_ETH_HLEN : ETH_DATA_LEN;
368 	struct xenvif *vif = netdev_priv(dev);
370 	if (!vif->can_sg)
372 	if (~(vif->gso_mask) & GSO_BIT(TCPV4))
374 	if (~(vif->gso_mask) & GSO_BIT(TCPV6))
376 	if (!vif->ip_csum)
378 	if (!vif->ipv6_csum)
429 	struct xenvif *vif = netdev_priv(dev);
435 	num_queues = READ_ONCE(vif->num_queues);
440 			void *vif_stats = &vif->queues[queue_index].stats;
490 	struct xenvif *vif;
493 	snprintf(name, IFNAMSIZ - 1, "vif%u.%u", domid, handle);
507 	vif = netdev_priv(dev);
509 	vif->domid  = domid;
510 	vif->handle = handle;
511 	vif->can_sg = 1;
512 	vif->ip_csum = 1;
513 	vif->dev = dev;
514 	vif->disabled = false;
515 	vif->drain_timeout = msecs_to_jiffies(rx_drain_timeout_msecs);
516 	vif->stall_timeout = msecs_to_jiffies(rx_stall_timeout_msecs);
519 	vif->queues = NULL;
520 	vif->num_queues = 0;
522 	vif->xdp_headroom = 0;
524 	spin_lock_init(&vif->lock);
525 	INIT_LIST_HEAD(&vif->fe_mcast_addr);
558 	return vif;
590 		netdev_err(queue->vif->dev, "Could not reserve mmap_pages\n");
605 void xenvif_carrier_on(struct xenvif *vif)
608 	if (!vif->can_sg && vif->dev->mtu > ETH_DATA_LEN)
609 		dev_set_mtu(vif->dev, ETH_DATA_LEN);
610 	netdev_update_features(vif->dev);
611 	set_bit(VIF_STATUS_CONNECTED, &vif->status);
612 	if (netif_running(vif->dev))
613 		xenvif_up(vif);
617 int xenvif_connect_ctrl(struct xenvif *vif, grant_ref_t ring_ref,
620 	struct net_device *dev = vif->dev;
621 	struct xenbus_device *xendev = xenvif_to_xenbus_device(vif);
635 	BACK_RING_ATTACH(&vif->ctrl, shared, rsp_prod, XEN_PAGE_SIZE);
638 	if (req_prod - rsp_prod > RING_SIZE(&vif->ctrl))
645 	vif->ctrl_irq = err;
647 	xenvif_init_hash(vif);
649 	err = request_threaded_irq(vif->ctrl_irq, NULL, xenvif_ctrl_irq_fn,
650 				   IRQF_ONESHOT, "xen-netback-ctrl", vif);
659 	xenvif_deinit_hash(vif);
660 	unbind_from_irqhandler(vif->ctrl_irq, vif);
661 	vif->ctrl_irq = 0;
664 	xenbus_unmap_ring_vfree(xendev, vif->ctrl.sring);
665 	vif->ctrl.sring = NULL;
709 	struct xenbus_device *dev = xenvif_to_xenbus_device(queue->vif);
726 	netif_napi_add(queue->vif->dev, &queue->napi, xenvif_poll);
789 void xenvif_carrier_off(struct xenvif *vif)
791 	struct net_device *dev = vif->dev;
794 	if (test_and_clear_bit(VIF_STATUS_CONNECTED, &vif->status)) {
797 			xenvif_down(vif);
802 void xenvif_disconnect_data(struct xenvif *vif)
805 	unsigned int num_queues = vif->num_queues;
808 	xenvif_carrier_off(vif);
811 		queue = &vif->queues[queue_index];
816 	xenvif_mcast_addr_list_free(vif);
819 void xenvif_disconnect_ctrl(struct xenvif *vif)
821 	if (vif->ctrl_irq) {
822 		xenvif_deinit_hash(vif);
823 		unbind_from_irqhandler(vif->ctrl_irq, vif);
824 		vif->ctrl_irq = 0;
827 	if (vif->ctrl.sring) {
828 		xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(vif),
829 					vif->ctrl.sring);
830 		vif->ctrl.sring = NULL;
843 void xenvif_free(struct xenvif *vif)
845 	struct xenvif_queue *queues = vif->queues;
846 	unsigned int num_queues = vif->num_queues;
849 	unregister_netdev(vif->dev);
850 	free_netdev(vif->dev);