C++ (Cpp) ftmac100_rx_drop_packet Examples

Example #1

File: ftmac100.c Project: ParrotSec/linux-psec

static bool ftmac100_rx_packet(struct ftmac100 *priv, int *processed)
{
	struct net_device *netdev = priv->netdev;
	struct ftmac100_rxdes *rxdes;
	struct sk_buff *skb;
	struct page *page;
	dma_addr_t map;
	int length;

	rxdes = ftmac100_rx_locate_first_segment(priv);
	if (!rxdes)
		return false;

	if (unlikely(ftmac100_rx_packet_error(priv, rxdes))) {
		ftmac100_rx_drop_packet(priv);
		return true;
	}

	/*
	 * It is impossible to get multi-segment packets
	 * because we always provide big enough receive buffers.
	 */
	if (unlikely(!ftmac100_rxdes_last_segment(rxdes)))
		BUG();

	/* start processing */
	skb = netdev_alloc_skb_ip_align(netdev, 128);
	if (unlikely(!skb)) {
		if (net_ratelimit())
			netdev_err(netdev, "rx skb alloc failed\n");

		ftmac100_rx_drop_packet(priv);
		return true;
	}

	if (unlikely(ftmac100_rxdes_multicast(rxdes)))
		netdev->stats.multicast++;

	map = ftmac100_rxdes_get_dma_addr(rxdes);
	dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);

	length = ftmac100_rxdes_frame_length(rxdes);
	page = ftmac100_rxdes_get_page(rxdes);
	skb_fill_page_desc(skb, 0, page, 0, length);
	skb->len += length;
	skb->data_len += length;

	if (length > 128) {
		skb->truesize += PAGE_SIZE;
		/* We pull the minimum amount into linear part */
		__pskb_pull_tail(skb, ETH_HLEN);
	} else {
		/* Small frames are copied into linear part to free one page */
		__pskb_pull_tail(skb, length);
	}
	ftmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);

	ftmac100_rx_pointer_advance(priv);

	skb->protocol = eth_type_trans(skb, netdev);

	netdev->stats.rx_packets++;
	netdev->stats.rx_bytes += skb->len;

	/* push packet to protocol stack */
	netif_receive_skb(skb);

	(*processed)++;
	return true;
}

Example #2

File: ftmac100.c Project: romanbb/android_kernel_lge_d851

static bool ftmac100_rx_packet(struct ftmac100 *priv, int *processed)
{
	struct net_device *netdev = priv->netdev;
	struct ftmac100_rxdes *rxdes;
	struct sk_buff *skb;
	struct page *page;
	dma_addr_t map;
	int length;

	rxdes = ftmac100_rx_locate_first_segment(priv);
	if (!rxdes)
		return false;

	if (unlikely(ftmac100_rx_packet_error(priv, rxdes))) {
		ftmac100_rx_drop_packet(priv);
		return true;
	}

	/*
                                                 
                                                         
  */
	if (unlikely(!ftmac100_rxdes_last_segment(rxdes)))
		BUG();

	/*                  */
	skb = netdev_alloc_skb_ip_align(netdev, 128);
	if (unlikely(!skb)) {
		if (net_ratelimit())
			netdev_err(netdev, "rx skb alloc failed\n");

		ftmac100_rx_drop_packet(priv);
		return true;
	}

	if (unlikely(ftmac100_rxdes_multicast(rxdes)))
		netdev->stats.multicast++;

	map = ftmac100_rxdes_get_dma_addr(rxdes);
	dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);

	length = ftmac100_rxdes_frame_length(rxdes);
	page = ftmac100_rxdes_get_page(rxdes);
	skb_fill_page_desc(skb, 0, page, 0, length);
	skb->len += length;
	skb->data_len += length;

	/*                                           */
	if (length > 64)
		skb->truesize += PAGE_SIZE;
	__pskb_pull_tail(skb, min(length, 64));

	ftmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);

	ftmac100_rx_pointer_advance(priv);

	skb->protocol = eth_type_trans(skb, netdev);

	netdev->stats.rx_packets++;
	netdev->stats.rx_bytes += skb->len;

	/*                               */
	netif_receive_skb(skb);

	(*processed)++;
	return true;
}