redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

sis190: Rx path update

Browse source 
- remove the function pointer to help gcc optimizing the
  inline pci_dma functions
- pci_dma_sync_single_for_cpu is not needed for a single
  large packet
- convert rtl8169_try_rx_copy to bool

b449655ff5 did the same
for the r8169 driver.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
This commit is contained in:
Francois Romieu 2008-04-27 17:59:52 +02:00
parent 35aeb78093
commit 47e4781544
1 changed files with 28 additions and 26 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

54
drivers/net/sis190.c
View file

@ -518,25 +518,28 @@ static u32 sis190_rx_fill(struct sis190_private *tp, struct net_device *dev,
return cur - start;
}
static int sis190_try_rx_copy(struct sis190_private *tp,
struct sk_buff **sk_buff, int pkt_size,
struct RxDesc *desc)
static bool sis190_try_rx_copy(struct sis190_private *tp,
struct sk_buff **sk_buff, int pkt_size,
dma_addr_t addr)
{
int ret = -1;
struct sk_buff *skb;
bool done = false;
if (pkt_size < rx_copybreak) {
struct sk_buff *skb;
if (pkt_size >= rx_copybreak)
goto out;
skb = netdev_alloc_skb(tp->dev, pkt_size + 2);
if (skb) {
skb_reserve(skb, 2);
skb_copy_to_linear_data(skb, sk_buff[0]->data, pkt_size);
*sk_buff = skb;
sis190_give_to_asic(desc, tp->rx_buf_sz);
ret = 0;
}
}
return ret;
skb = netdev_alloc_skb(tp->dev, pkt_size + 2);
if (!skb)
goto out;
pci_dma_sync_single_for_device(tp->pci_dev, addr, pkt_size,
PCI_DMA_FROMDEVICE);
skb_reserve(skb, 2);
skb_copy_to_linear_data(skb, sk_buff[0]->data, pkt_size);
*sk_buff = skb;
done = true;
out:
return done;
}
static inline int sis190_rx_pkt_err(u32 status, struct net_device_stats *stats)
@ -586,9 +589,9 @@ static int sis190_rx_interrupt(struct net_device *dev,
sis190_give_to_asic(desc, tp->rx_buf_sz);
else {
struct sk_buff *skb = tp->Rx_skbuff[entry];
dma_addr_t addr = le32_to_cpu(desc->addr);
int pkt_size = (status & RxSizeMask) - 4;
void (*pci_action)(struct pci_dev *, dma_addr_t,
size_t, int) = pci_dma_sync_single_for_device;
struct pci_dev *pdev = tp->pci_dev;
if (unlikely(pkt_size > tp->rx_buf_sz)) {
net_intr(tp, KERN_INFO
@ -600,19 +603,18 @@ static int sis190_rx_interrupt(struct net_device *dev,
continue;
}
pci_dma_sync_single_for_cpu(tp->pci_dev,
le32_to_cpu(desc->addr), tp->rx_buf_sz,
PCI_DMA_FROMDEVICE);
if (sis190_try_rx_copy(tp, &skb, pkt_size, desc)) {
pci_action = pci_unmap_single;
if (sis190_try_rx_copy(tp, &skb, pkt_size, addr)) {
pci_dma_sync_single_for_device(pdev, addr,
tp->rx_buf_sz, PCI_DMA_FROMDEVICE);
sis190_give_to_asic(desc, tp->rx_buf_sz);
} else {
pci_unmap_single(pdev, addr, tp->rx_buf_sz,
PCI_DMA_FROMDEVICE);
tp->Rx_skbuff[entry] = NULL;
sis190_make_unusable_by_asic(desc);
}
pci_action(tp->pci_dev, le32_to_cpu(desc->addr),
tp->rx_buf_sz, PCI_DMA_FROMDEVICE);
skb_put(skb, pkt_size);
skb->protocol = eth_type_trans(skb, dev);