From 4709aa59ede5ff9902d60088d93d1c0e2e9d2247 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Sun, 27 Apr 2008 14:36:59 +0200 Subject: [PATCH 1/6] sis190: use the allocated buffer as a status code in sis190_alloc_rx_skb The local status code does not carry mory information. Signed-off-by: Stephen Hemminger Acked-by: Francois Romieu --- drivers/net/sis190.c | 37 +++++++++++++++---------------------- 1 file changed, 15 insertions(+), 22 deletions(-) diff --git a/drivers/net/sis190.c b/drivers/net/sis190.c index 20745fd4e973..0d6aa1fc9c68 100644 --- a/drivers/net/sis190.c +++ b/drivers/net/sis190.c @@ -480,30 +480,22 @@ static inline void sis190_make_unusable_by_asic(struct RxDesc *desc) desc->status = 0x0; } -static int sis190_alloc_rx_skb(struct pci_dev *pdev, struct sk_buff **sk_buff, - struct RxDesc *desc, u32 rx_buf_sz) +static struct sk_buff *sis190_alloc_rx_skb(struct pci_dev *pdev, + struct RxDesc *desc, u32 rx_buf_sz) { struct sk_buff *skb; - dma_addr_t mapping; - int ret = 0; skb = dev_alloc_skb(rx_buf_sz); - if (!skb) - goto err_out; + if (likely(skb)) { + dma_addr_t mapping; - *sk_buff = skb; + mapping = pci_map_single(pdev, skb->data, rx_buf_sz, + PCI_DMA_FROMDEVICE); + sis190_map_to_asic(desc, mapping, rx_buf_sz); + } else + sis190_make_unusable_by_asic(desc); - mapping = pci_map_single(pdev, skb->data, rx_buf_sz, - PCI_DMA_FROMDEVICE); - - sis190_map_to_asic(desc, mapping, rx_buf_sz); -out: - return ret; - -err_out: - ret = -ENOMEM; - sis190_make_unusable_by_asic(desc); - goto out; + return skb; } static u32 sis190_rx_fill(struct sis190_private *tp, struct net_device *dev, @@ -512,14 +504,15 @@ static u32 sis190_rx_fill(struct sis190_private *tp, struct net_device *dev, u32 cur; for (cur = start; cur < end; cur++) { - int ret, i = cur % NUM_RX_DESC; + unsigned int i = cur % NUM_RX_DESC; if (tp->Rx_skbuff[i]) continue; - ret = sis190_alloc_rx_skb(tp->pci_dev, tp->Rx_skbuff + i, - tp->RxDescRing + i, tp->rx_buf_sz); - if (ret < 0) + tp->Rx_skbuff[i] = sis190_alloc_rx_skb(tp->pci_dev, + tp->RxDescRing + i, + tp->rx_buf_sz); + if (!tp->Rx_skbuff[i]) break; } return cur - start; From e3eccad9f6e84656b45bfa07738934145b09e11e Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Sun, 27 Apr 2008 14:42:27 +0200 Subject: [PATCH 2/6] sis190: hard-code the alignment of tiny packets There is no DMA involved here. Align the IP header without condition. Signed-off-by: Stephen Hemminger Acked-by: Francois Romieu --- drivers/net/sis190.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/sis190.c b/drivers/net/sis190.c index 0d6aa1fc9c68..248c3855f4d5 100644 --- a/drivers/net/sis190.c +++ b/drivers/net/sis190.c @@ -526,9 +526,9 @@ static inline int sis190_try_rx_copy(struct sk_buff **sk_buff, int pkt_size, if (pkt_size < rx_copybreak) { struct sk_buff *skb; - skb = dev_alloc_skb(pkt_size + NET_IP_ALIGN); + skb = dev_alloc_skb(pkt_size + 2); if (skb) { - skb_reserve(skb, NET_IP_ALIGN); + skb_reserve(skb, 2); skb_copy_to_linear_data(skb, sk_buff[0]->data, pkt_size); *sk_buff = skb; sis190_give_to_asic(desc, rx_buf_sz); From 35aeb7809345e0362772a75368a3e62ecd931481 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Sun, 27 Apr 2008 14:54:32 +0200 Subject: [PATCH 3/6] sis190: use netdev_alloc_skb This sets skb->dev and allows arch specific allocation. Signed-off-by: Stephen Hemminger Acked-by: Francois Romieu --- drivers/net/sis190.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/drivers/net/sis190.c b/drivers/net/sis190.c index 248c3855f4d5..97aa18dd9a4b 100644 --- a/drivers/net/sis190.c +++ b/drivers/net/sis190.c @@ -480,16 +480,17 @@ static inline void sis190_make_unusable_by_asic(struct RxDesc *desc) desc->status = 0x0; } -static struct sk_buff *sis190_alloc_rx_skb(struct pci_dev *pdev, - struct RxDesc *desc, u32 rx_buf_sz) +static struct sk_buff *sis190_alloc_rx_skb(struct sis190_private *tp, + struct RxDesc *desc) { + u32 rx_buf_sz = tp->rx_buf_sz; struct sk_buff *skb; - skb = dev_alloc_skb(rx_buf_sz); + skb = netdev_alloc_skb(tp->dev, rx_buf_sz); if (likely(skb)) { dma_addr_t mapping; - mapping = pci_map_single(pdev, skb->data, rx_buf_sz, + mapping = pci_map_single(tp->pci_dev, skb->data, tp->rx_buf_sz, PCI_DMA_FROMDEVICE); sis190_map_to_asic(desc, mapping, rx_buf_sz); } else @@ -509,29 +510,29 @@ static u32 sis190_rx_fill(struct sis190_private *tp, struct net_device *dev, if (tp->Rx_skbuff[i]) continue; - tp->Rx_skbuff[i] = sis190_alloc_rx_skb(tp->pci_dev, - tp->RxDescRing + i, - tp->rx_buf_sz); + tp->Rx_skbuff[i] = sis190_alloc_rx_skb(tp, tp->RxDescRing + i); + if (!tp->Rx_skbuff[i]) break; } return cur - start; } -static inline int sis190_try_rx_copy(struct sk_buff **sk_buff, int pkt_size, - struct RxDesc *desc, int rx_buf_sz) +static int sis190_try_rx_copy(struct sis190_private *tp, + struct sk_buff **sk_buff, int pkt_size, + struct RxDesc *desc) { int ret = -1; if (pkt_size < rx_copybreak) { struct sk_buff *skb; - skb = dev_alloc_skb(pkt_size + 2); + 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, rx_buf_sz); + sis190_give_to_asic(desc, tp->rx_buf_sz); ret = 0; } } @@ -603,8 +604,7 @@ static int sis190_rx_interrupt(struct net_device *dev, le32_to_cpu(desc->addr), tp->rx_buf_sz, PCI_DMA_FROMDEVICE); - if (sis190_try_rx_copy(&skb, pkt_size, desc, - tp->rx_buf_sz)) { + if (sis190_try_rx_copy(tp, &skb, pkt_size, desc)) { pci_action = pci_unmap_single; tp->Rx_skbuff[entry] = NULL; sis190_make_unusable_by_asic(desc); From 47e4781544aaf2916170ef5516786fbb19447600 Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Sun, 27 Apr 2008 17:59:52 +0200 Subject: [PATCH 4/6] sis190: Rx path update - 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 b449655ff52ff8a29c66c5fc3fc03617e61182ee did the same for the r8169 driver. Signed-off-by: Francois Romieu --- drivers/net/sis190.c | 54 +++++++++++++++++++++++--------------------- 1 file changed, 28 insertions(+), 26 deletions(-) diff --git a/drivers/net/sis190.c b/drivers/net/sis190.c index 97aa18dd9a4b..0b22e75633a2 100644 --- a/drivers/net/sis190.c +++ b/drivers/net/sis190.c @@ -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); From c34ebbae01e3d1f6a5cced6a40dc0ed792590d22 Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Sun, 18 Nov 2007 22:04:05 +0100 Subject: [PATCH 5/6] sis190: remove needless MII reset It does not help the auto-negotiation process to settle. Added a debug message to give some hindsight when things do not work as expected. Signed-off-by: Francois Romieu --- drivers/net/sis190.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/net/sis190.c b/drivers/net/sis190.c index 0b22e75633a2..20f48296efcb 100644 --- a/drivers/net/sis190.c +++ b/drivers/net/sis190.c @@ -899,10 +899,9 @@ static void sis190_phy_task(struct work_struct *work) mod_timer(&tp->timer, jiffies + HZ/10); } else if (!(mdio_read_latched(ioaddr, phy_id, MII_BMSR) & BMSR_ANEGCOMPLETE)) { - net_link(tp, KERN_WARNING "%s: PHY reset until link up.\n", - dev->name); netif_carrier_off(dev); - mdio_write(ioaddr, phy_id, MII_BMCR, val | BMCR_RESET); + net_link(tp, KERN_WARNING "%s: auto-negotiating...\n", + dev->name); mod_timer(&tp->timer, jiffies + SIS190_PHY_TIMEOUT); } else { /* Rejoice ! */ From 697c269610179051cf19e45566fee3dcebbb1e93 Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Wed, 21 Nov 2007 22:30:37 +0100 Subject: [PATCH 6/6] sis190: account for Tx errors Update the collision counter as well. Signed-off-by: Francois Romieu --- drivers/net/sis190.c | 38 +++++++++++++++++++++++++++++++++++--- 1 file changed, 35 insertions(+), 3 deletions(-) diff --git a/drivers/net/sis190.c b/drivers/net/sis190.c index 20f48296efcb..abc63b0663be 100644 --- a/drivers/net/sis190.c +++ b/drivers/net/sis190.c @@ -212,6 +212,12 @@ enum _DescStatusBit { THOL2 = 0x20000000, THOL1 = 0x10000000, THOL0 = 0x00000000, + + WND = 0x00080000, + TABRT = 0x00040000, + FIFO = 0x00020000, + LINK = 0x00010000, + ColCountMask = 0x0000ffff, /* RxDesc.status */ IPON = 0x20000000, TCPON = 0x10000000, @@ -653,9 +659,31 @@ static void sis190_unmap_tx_skb(struct pci_dev *pdev, struct sk_buff *skb, memset(desc, 0x00, sizeof(*desc)); } +static inline int sis190_tx_pkt_err(u32 status, struct net_device_stats *stats) +{ +#define TxErrMask (WND | TABRT | FIFO | LINK) + + if (!unlikely(status & TxErrMask)) + return 0; + + if (status & WND) + stats->tx_window_errors++; + if (status & TABRT) + stats->tx_aborted_errors++; + if (status & FIFO) + stats->tx_fifo_errors++; + if (status & LINK) + stats->tx_carrier_errors++; + + stats->tx_errors++; + + return -1; +} + static void sis190_tx_interrupt(struct net_device *dev, struct sis190_private *tp, void __iomem *ioaddr) { + struct net_device_stats *stats = &dev->stats; u32 pending, dirty_tx = tp->dirty_tx; /* * It would not be needed if queueing was allowed to be enabled @@ -670,15 +698,19 @@ static void sis190_tx_interrupt(struct net_device *dev, for (; pending; pending--, dirty_tx++) { unsigned int entry = dirty_tx % NUM_TX_DESC; struct TxDesc *txd = tp->TxDescRing + entry; + u32 status = le32_to_cpu(txd->status); struct sk_buff *skb; - if (le32_to_cpu(txd->status) & OWNbit) + if (status & OWNbit) break; skb = tp->Tx_skbuff[entry]; - dev->stats.tx_packets++; - dev->stats.tx_bytes += skb->len; + if (likely(sis190_tx_pkt_err(status, stats) == 0)) { + stats->tx_packets++; + stats->tx_bytes += skb->len; + stats->collisions += ((status & ColCountMask) - 1); + } sis190_unmap_tx_skb(tp->pci_dev, skb, txd); tp->Tx_skbuff[entry] = NULL;