C++ (Cpp) greth_update_tx_stats Beispiele

Beispiel #1

Datei: greth.c Projekt: CSCLOG/beaglebone

static void greth_clean_tx_gbit(struct net_device *dev)
{
	struct greth_private *greth;
	struct greth_bd *bdp, *bdp_last_frag;
	struct sk_buff *skb;
	u32 stat;
	int nr_frags, i;

	greth = netdev_priv(dev);

	while (greth->tx_free < GRETH_TXBD_NUM) {

		skb = greth->tx_skbuff[greth->tx_last];

		nr_frags = skb_shinfo(skb)->nr_frags;

		/* We only clean fully completed SKBs */
		bdp_last_frag = greth->tx_bd_base + SKIP_TX(greth->tx_last, nr_frags);

		GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX);
		mb();
		stat = greth_read_bd(&bdp_last_frag->stat);

		if (stat & GRETH_BD_EN)
			break;

		greth->tx_skbuff[greth->tx_last] = NULL;

		greth_update_tx_stats(dev, stat);
		dev->stats.tx_bytes += skb->len;

		bdp = greth->tx_bd_base + greth->tx_last;

		greth->tx_last = NEXT_TX(greth->tx_last);

		dma_unmap_single(greth->dev,
				 greth_read_bd(&bdp->addr),
				 skb_headlen(skb),
				 DMA_TO_DEVICE);

		for (i = 0; i < nr_frags; i++) {
			skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
			bdp = greth->tx_bd_base + greth->tx_last;

			dma_unmap_page(greth->dev,
				       greth_read_bd(&bdp->addr),
				       frag->size,
				       DMA_TO_DEVICE);

			greth->tx_last = NEXT_TX(greth->tx_last);
		}
		greth->tx_free += nr_frags+1;
		dev_kfree_skb(skb);
	}

	if (netif_queue_stopped(dev) && (greth->tx_free > (MAX_SKB_FRAGS+1)))
		netif_wake_queue(dev);
}

Beispiel #2

Datei: greth.c Projekt: 513855417/linux

static void greth_clean_tx_gbit(struct net_device *dev)
{
	struct greth_private *greth;
	struct greth_bd *bdp, *bdp_last_frag;
	struct sk_buff *skb = NULL;
	u32 stat;
	int nr_frags, i;
	u16 tx_last;

	greth = netdev_priv(dev);
	tx_last = greth->tx_last;

	while (tx_last != greth->tx_next) {

		skb = greth->tx_skbuff[tx_last];

		nr_frags = skb_shinfo(skb)->nr_frags;

		/* We only clean fully completed SKBs */
		bdp_last_frag = greth->tx_bd_base + SKIP_TX(tx_last, nr_frags);

		GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX);
		mb();
		stat = greth_read_bd(&bdp_last_frag->stat);

		if (stat & GRETH_BD_EN)
			break;

		greth->tx_skbuff[tx_last] = NULL;

		greth_update_tx_stats(dev, stat);
		dev->stats.tx_bytes += skb->len;

		bdp = greth->tx_bd_base + tx_last;

		tx_last = NEXT_TX(tx_last);

		dma_unmap_single(greth->dev,
				 greth_read_bd(&bdp->addr),
				 skb_headlen(skb),
				 DMA_TO_DEVICE);

		for (i = 0; i < nr_frags; i++) {
			skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
			bdp = greth->tx_bd_base + tx_last;

			dma_unmap_page(greth->dev,
				       greth_read_bd(&bdp->addr),
				       skb_frag_size(frag),
				       DMA_TO_DEVICE);

			tx_last = NEXT_TX(tx_last);
		}
		dev_kfree_skb(skb);
	}
	if (skb) { /* skb is set only if the above while loop was entered */
		wmb();
		greth->tx_last = tx_last;

		if (netif_queue_stopped(dev) &&
		    (greth_num_free_bds(tx_last, greth->tx_next) >
		    (MAX_SKB_FRAGS+1)))
			netif_wake_queue(dev);
	}
}