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e1000: Add copybreak when using packet split

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Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
This commit is contained in:
Jeff Kirsher 2006-03-02 18:21:40 -08:00 committed by root
parent 8704163987
commit dc7c6add34
1 changed files with 30 additions and 0 deletions
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30
drivers/net/e1000/e1000_main.c
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@ -3757,6 +3757,35 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
/* Good Receive */
skb_put(skb, length);
{
/* this looks ugly, but it seems compiler issues make it
more efficient than reusing j */
int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
/* page alloc/put takes too long and effects small packet
* throughput, so unsplit small packets and save the alloc/put*/
if (l1 && ((length + l1) < E1000_CB_LENGTH)) {
u8 *vaddr;
/* there is no documentation about how to call
* kmap_atomic, so we can't hold the mapping
* very long */
pci_dma_sync_single_for_cpu(pdev,
ps_page_dma->ps_page_dma[0],
PAGE_SIZE,
PCI_DMA_FROMDEVICE);
vaddr = kmap_atomic(ps_page->ps_page[0],
KM_SKB_DATA_SOFTIRQ);
memcpy(skb->tail, vaddr, l1);
kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
pci_dma_sync_single_for_device(pdev,
ps_page_dma->ps_page_dma[0],
PAGE_SIZE, PCI_DMA_FROMDEVICE);
skb_put(skb, l1);
length += l1;
goto copydone;
} /* if */
}
for (j = 0; j < adapter->rx_ps_pages; j++) {
if (!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
break;
@ -3771,6 +3800,7 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
skb->data_len += length;
}
copydone:
e1000_rx_checksum(adapter, staterr,
rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
skb->protocol = eth_type_trans(skb, netdev);