From: Stephen Hemminger Date: Sat, 16 Jun 2007 23:06:49 +0000 (+0200) Subject: r8169: Rx path update X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b449655ff52ff8a29c66c5fc3fc03617e61182ee;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git r8169: Rx path update - pci_dma_sync_single_for_cpu is not needed for a single large packet - remove the function pointer to help gcc optimizing the inline pci_dma functions. Signed-off-by: Stephen Hemminger Signed-off-by: Francois Romieu Cc: Edward Hsu --- diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index e4827a41468..4d0cdbaf527 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -2483,25 +2483,27 @@ static inline void rtl8169_rx_csum(struct sk_buff *skb, struct RxDesc *desc) skb->ip_summed = CHECKSUM_NONE; } -static inline int rtl8169_try_rx_copy(struct sk_buff **sk_buff, int pkt_size, - struct RxDesc *desc, int rx_buf_sz, - unsigned int align) +static inline bool rtl8169_try_rx_copy(struct sk_buff **sk_buff, int pkt_size, + struct pci_dev *pdev, dma_addr_t addr, + unsigned int align) { - 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 = dev_alloc_skb(pkt_size + align); - if (skb) { - skb_reserve(skb, (align - 1) & (unsigned long)skb->data); - skb_copy_from_linear_data(*sk_buff, skb->data, pkt_size); - *sk_buff = skb; - rtl8169_mark_to_asic(desc, rx_buf_sz); - ret = 0; - } - } - return ret; + skb = dev_alloc_skb(pkt_size + align); + if (!skb) + goto out; + + pci_dma_sync_single_for_cpu(pdev, addr, pkt_size, PCI_DMA_FROMDEVICE); + skb_reserve(skb, (align - 1) & (unsigned long)skb->data); + skb_copy_from_linear_data(*sk_buff, skb->data, pkt_size); + *sk_buff = skb; + done = true; +out: + return done; } static int @@ -2547,9 +2549,9 @@ rtl8169_rx_interrupt(struct net_device *dev, struct rtl8169_private *tp, rtl8169_mark_to_asic(desc, tp->rx_buf_sz); } else { struct sk_buff *skb = tp->Rx_skbuff[entry]; + dma_addr_t addr = le64_to_cpu(desc->addr); int pkt_size = (status & 0x00001FFF) - 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; /* * The driver does not support incoming fragmented @@ -2565,19 +2567,17 @@ rtl8169_rx_interrupt(struct net_device *dev, struct rtl8169_private *tp, rtl8169_rx_csum(skb, desc); - pci_dma_sync_single_for_cpu(tp->pci_dev, - le64_to_cpu(desc->addr), tp->rx_buf_sz, - PCI_DMA_FROMDEVICE); - - if (rtl8169_try_rx_copy(&skb, pkt_size, desc, - tp->rx_buf_sz, tp->align)) { - pci_action = pci_unmap_single; + if (rtl8169_try_rx_copy(&skb, pkt_size, pdev, addr, + tp->align)) { + pci_dma_sync_single_for_device(pdev, addr, + pkt_size, PCI_DMA_FROMDEVICE); + rtl8169_mark_to_asic(desc, tp->rx_buf_sz); + } else { + pci_unmap_single(pdev, addr, pkt_size, + PCI_DMA_FROMDEVICE); tp->Rx_skbuff[entry] = NULL; } - pci_action(tp->pci_dev, le64_to_cpu(desc->addr), - tp->rx_buf_sz, PCI_DMA_FROMDEVICE); - skb_put(skb, pkt_size); skb->protocol = eth_type_trans(skb, dev);