skge: add byte queue limit support
This also changes the cleanup logic slightly to aggregate completed notifications for multiple packets. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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302476c998
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@ -2817,6 +2817,8 @@ static netdev_tx_t skge_xmit_frame(struct sk_buff *skb,
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td->control = BMU_OWN | BMU_SW | BMU_STF | control | len;
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wmb();
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netdev_sent_queue(dev, skb->len);
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skge_write8(hw, Q_ADDR(txqaddr[skge->port], Q_CSR), CSR_START);
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netif_printk(skge, tx_queued, KERN_DEBUG, skge->netdev,
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@ -2858,11 +2860,9 @@ mapping_error:
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/* Free resources associated with this reing element */
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static void skge_tx_free(struct skge_port *skge, struct skge_element *e,
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u32 control)
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static inline void skge_tx_unmap(struct pci_dev *pdev, struct skge_element *e,
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u32 control)
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{
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struct pci_dev *pdev = skge->hw->pdev;
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/* skb header vs. fragment */
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if (control & BMU_STF)
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pci_unmap_single(pdev, dma_unmap_addr(e, mapaddr),
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@ -2872,13 +2872,6 @@ static void skge_tx_free(struct skge_port *skge, struct skge_element *e,
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pci_unmap_page(pdev, dma_unmap_addr(e, mapaddr),
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dma_unmap_len(e, maplen),
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PCI_DMA_TODEVICE);
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if (control & BMU_EOF) {
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netif_printk(skge, tx_done, KERN_DEBUG, skge->netdev,
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"tx done slot %td\n", e - skge->tx_ring.start);
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dev_kfree_skb(e->skb);
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}
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}
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/* Free all buffers in transmit ring */
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@ -2889,10 +2882,15 @@ static void skge_tx_clean(struct net_device *dev)
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for (e = skge->tx_ring.to_clean; e != skge->tx_ring.to_use; e = e->next) {
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struct skge_tx_desc *td = e->desc;
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skge_tx_free(skge, e, td->control);
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skge_tx_unmap(skge->hw->pdev, e, td->control);
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if (td->control & BMU_EOF)
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dev_kfree_skb(e->skb);
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td->control = 0;
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}
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netdev_reset_queue(dev);
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skge->tx_ring.to_clean = e;
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}
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@ -3157,6 +3155,7 @@ static void skge_tx_done(struct net_device *dev)
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struct skge_port *skge = netdev_priv(dev);
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struct skge_ring *ring = &skge->tx_ring;
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struct skge_element *e;
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unsigned int bytes_compl = 0, pkts_compl = 0;
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skge_write8(skge->hw, Q_ADDR(txqaddr[skge->port], Q_CSR), CSR_IRQ_CL_F);
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@ -3166,8 +3165,20 @@ static void skge_tx_done(struct net_device *dev)
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if (control & BMU_OWN)
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break;
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skge_tx_free(skge, e, control);
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skge_tx_unmap(skge->hw->pdev, e, control);
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if (control & BMU_EOF) {
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netif_printk(skge, tx_done, KERN_DEBUG, skge->netdev,
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"tx done slot %td\n",
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e - skge->tx_ring.start);
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pkts_compl++;
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bytes_compl += e->skb->len;
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dev_kfree_skb(e->skb);
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}
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}
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netdev_completed_queue(dev, pkts_compl, bytes_compl);
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skge->tx_ring.to_clean = e;
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/* Can run lockless until we need to synchronize to restart queue. */
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