C++ (Cpp) __netif_rx_complete Examples

Example #1

File: bcm63xx_enet.c Project: neufbox/2.1.5

/*
 * poll func, called by network core
 */
static int bcm_enet_poll(struct napi_struct *napi, int budget)
{
	struct bcm_enet_priv *priv;
	struct net_device *dev;
	int tx_work_done, rx_work_done;

	priv = container_of(napi, struct bcm_enet_priv, napi);
	dev = priv->net_dev;

	/* ack interrupts */
	enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
			ENETDMA_IR_REG(priv->rx_chan));
	enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
			ENETDMA_IR_REG(priv->tx_chan));

	/* reclaim sent skb */
	tx_work_done = bcm_enet_tx_reclaim(dev, 0);

	spin_lock(&priv->rx_lock);
	rx_work_done = bcm_enet_receive_queue(dev, budget);
	spin_unlock(&priv->rx_lock);

	if (rx_work_done >= budget || tx_work_done > 0) {
		/* rx/tx queue is not yet empty/clean */
		return rx_work_done;
	}

	/* no more packet in rx/tx queue, remove device from poll
	 * queue */
	__netif_rx_complete(dev, napi);

	/* restore rx/tx interrupt */
	enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
			ENETDMA_IRMASK_REG(priv->rx_chan));
	enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
			ENETDMA_IRMASK_REG(priv->tx_chan));

	return rx_work_done;
}

Example #2

File: 8139cp.c Project: OpenHMR/Open-HMR600

static int cp_rx_poll (struct net_device *dev, int *budget)
{
	struct cp_private *cp = netdev_priv(dev);
	unsigned rx_tail = cp->rx_tail;
	unsigned rx_work = dev->quota;
	unsigned rx;

rx_status_loop:
	rx = 0;
	cpw16(IntrStatus, cp_rx_intr_mask);

	while (1) {
		u32 status, len;
		dma_addr_t mapping;
		struct sk_buff *skb, *new_skb;
		struct cp_desc *desc;
		unsigned buflen;

		skb = cp->rx_skb[rx_tail].skb;
		if (!skb)
			BUG();

		desc = &cp->rx_ring[rx_tail];
		status = le32_to_cpu(desc->opts1);
		if (status & DescOwn)
			break;

		len = (status & 0x1fff) - 4;
		mapping = cp->rx_skb[rx_tail].mapping;

		if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag)) {
			/* we don't support incoming fragmented frames.
			 * instead, we attempt to ensure that the
			 * pre-allocated RX skbs are properly sized such
			 * that RX fragments are never encountered
			 */
			cp_rx_err_acct(cp, rx_tail, status, len);
			cp->net_stats.rx_dropped++;
			cp->cp_stats.rx_frags++;
			goto rx_next;
		}

		if (status & (RxError | RxErrFIFO)) {
			cp_rx_err_acct(cp, rx_tail, status, len);
			goto rx_next;
		}

		if (netif_msg_rx_status(cp))
			printk(KERN_DEBUG "%s: rx slot %d status 0x%x len %d\n",
			       cp->dev->name, rx_tail, status, len);

		buflen = cp->rx_buf_sz + RX_OFFSET;
		new_skb = dev_alloc_skb (buflen);
		if (!new_skb) {
			cp->net_stats.rx_dropped++;
			goto rx_next;
		}

		skb_reserve(new_skb, RX_OFFSET);
		new_skb->dev = cp->dev;

		pci_unmap_single(cp->pdev, mapping,
				 buflen, PCI_DMA_FROMDEVICE);

		/* Handle checksum offloading for incoming packets. */
		if (cp_rx_csum_ok(status))
			skb->ip_summed = CHECKSUM_UNNECESSARY;
		else
			skb->ip_summed = CHECKSUM_NONE;

		skb_put(skb, len);

		mapping =
		cp->rx_skb[rx_tail].mapping =
			pci_map_single(cp->pdev, new_skb->tail,
				       buflen, PCI_DMA_FROMDEVICE);
		cp->rx_skb[rx_tail].skb = new_skb;

		cp_rx_skb(cp, skb, desc);
		rx++;

rx_next:
		cp->rx_ring[rx_tail].opts2 = 0;
		cp->rx_ring[rx_tail].addr = cpu_to_le64(mapping);
		if (rx_tail == (CP_RX_RING_SIZE - 1))
			desc->opts1 = cpu_to_le32(DescOwn | RingEnd |
						  cp->rx_buf_sz);
		else
			desc->opts1 = cpu_to_le32(DescOwn | cp->rx_buf_sz);
		rx_tail = NEXT_RX(rx_tail);

		if (!rx_work--)
			break;
	}

	cp->rx_tail = rx_tail;

	dev->quota -= rx;
	*budget -= rx;

	/* if we did not reach work limit, then we're done with
	 * this round of polling
	 */
	if (rx_work) {
		if (cpr16(IntrStatus) & cp_rx_intr_mask)
			goto rx_status_loop;

		local_irq_disable();
		cpw16_f(IntrMask, cp_intr_mask);
		__netif_rx_complete(dev);
		local_irq_enable();

		return 0;	/* done */
	}

	return 1;		/* not done */
}