diff options
Diffstat (limited to 'drivers/net/8139cp.c')
-rw-r--r-- | drivers/net/8139cp.c | 100 |
1 files changed, 69 insertions, 31 deletions
diff --git a/drivers/net/8139cp.c b/drivers/net/8139cp.c index ca4c9ac..ca7746d 100644 --- a/drivers/net/8139cp.c +++ b/drivers/net/8139cp.c @@ -54,6 +54,7 @@ #include <linux/config.h> #include <linux/module.h> +#include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/compiler.h> #include <linux/netdevice.h> @@ -92,16 +93,17 @@ KERN_INFO DRV_NAME ": 10/100 PCI Ethernet driver v" DRV_VERSION " (" DRV_RELDATE MODULE_AUTHOR("Jeff Garzik <jgarzik@pobox.com>"); MODULE_DESCRIPTION("RealTek RTL-8139C+ series 10/100 PCI Ethernet driver"); +MODULE_VERSION(DRV_VERSION); MODULE_LICENSE("GPL"); static int debug = -1; -MODULE_PARM (debug, "i"); +module_param(debug, int, 0); MODULE_PARM_DESC (debug, "8139cp: bitmapped message enable number"); /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast). The RTL chips use a 64 element hash table based on the Ethernet CRC. */ static int multicast_filter_limit = 32; -MODULE_PARM (multicast_filter_limit, "i"); +module_param(multicast_filter_limit, int, 0); MODULE_PARM_DESC (multicast_filter_limit, "8139cp: maximum number of filtered multicast addresses"); #define PFX DRV_NAME ": " @@ -187,6 +189,9 @@ enum { RingEnd = (1 << 30), /* End of descriptor ring */ FirstFrag = (1 << 29), /* First segment of a packet */ LastFrag = (1 << 28), /* Final segment of a packet */ + LargeSend = (1 << 27), /* TCP Large Send Offload (TSO) */ + MSSShift = 16, /* MSS value position */ + MSSMask = 0xfff, /* MSS value: 11 bits */ TxError = (1 << 23), /* Tx error summary */ RxError = (1 << 20), /* Rx error summary */ IPCS = (1 << 18), /* Calculate IP checksum */ @@ -313,7 +318,7 @@ struct cp_desc { struct ring_info { struct sk_buff *skb; dma_addr_t mapping; - unsigned frag; + u32 len; }; struct cp_dma_stats { @@ -395,6 +400,9 @@ struct cp_private { static void __cp_set_rx_mode (struct net_device *dev); static void cp_tx (struct cp_private *cp); static void cp_clean_rings (struct cp_private *cp); +#ifdef CONFIG_NET_POLL_CONTROLLER +static void cp_poll_controller(struct net_device *dev); +#endif static struct pci_device_id cp_pci_tbl[] = { { PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139, @@ -689,6 +697,19 @@ cp_interrupt (int irq, void *dev_instance, struct pt_regs *regs) return IRQ_HANDLED; } +#ifdef CONFIG_NET_POLL_CONTROLLER +/* + * Polling receive - used by netconsole and other diagnostic tools + * to allow network i/o with interrupts disabled. + */ +static void cp_poll_controller(struct net_device *dev) +{ + disable_irq(dev->irq); + cp_interrupt(dev->irq, dev, NULL); + enable_irq(dev->irq); +} +#endif + static void cp_tx (struct cp_private *cp) { unsigned tx_head = cp->tx_head; @@ -708,7 +729,7 @@ static void cp_tx (struct cp_private *cp) BUG(); pci_unmap_single(cp->pdev, cp->tx_skb[tx_tail].mapping, - skb->len, PCI_DMA_TODEVICE); + cp->tx_skb[tx_tail].len, PCI_DMA_TODEVICE); if (status & LastFrag) { if (status & (TxError | TxFIFOUnder)) { @@ -750,10 +771,11 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev) { struct cp_private *cp = netdev_priv(dev); unsigned entry; - u32 eor; + u32 eor, flags; #if CP_VLAN_TAG_USED u32 vlan_tag = 0; #endif + int mss = 0; spin_lock_irq(&cp->lock); @@ -773,6 +795,9 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev) entry = cp->tx_head; eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0; + if (dev->features & NETIF_F_TSO) + mss = skb_shinfo(skb)->tso_size; + if (skb_shinfo(skb)->nr_frags == 0) { struct cp_desc *txd = &cp->tx_ring[entry]; u32 len; @@ -784,26 +809,26 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev) txd->addr = cpu_to_le64(mapping); wmb(); - if (skb->ip_summed == CHECKSUM_HW) { + flags = eor | len | DescOwn | FirstFrag | LastFrag; + + if (mss) + flags |= LargeSend | ((mss & MSSMask) << MSSShift); + else if (skb->ip_summed == CHECKSUM_HW) { const struct iphdr *ip = skb->nh.iph; if (ip->protocol == IPPROTO_TCP) - txd->opts1 = cpu_to_le32(eor | len | DescOwn | - FirstFrag | LastFrag | - IPCS | TCPCS); + flags |= IPCS | TCPCS; else if (ip->protocol == IPPROTO_UDP) - txd->opts1 = cpu_to_le32(eor | len | DescOwn | - FirstFrag | LastFrag | - IPCS | UDPCS); + flags |= IPCS | UDPCS; else - BUG(); - } else - txd->opts1 = cpu_to_le32(eor | len | DescOwn | - FirstFrag | LastFrag); + WARN_ON(1); /* we need a WARN() */ + } + + txd->opts1 = cpu_to_le32(flags); wmb(); cp->tx_skb[entry].skb = skb; cp->tx_skb[entry].mapping = mapping; - cp->tx_skb[entry].frag = 0; + cp->tx_skb[entry].len = len; entry = NEXT_TX(entry); } else { struct cp_desc *txd; @@ -821,7 +846,7 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev) first_len, PCI_DMA_TODEVICE); cp->tx_skb[entry].skb = skb; cp->tx_skb[entry].mapping = first_mapping; - cp->tx_skb[entry].frag = 1; + cp->tx_skb[entry].len = first_len; entry = NEXT_TX(entry); for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { @@ -837,16 +862,19 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev) len, PCI_DMA_TODEVICE); eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0; - if (skb->ip_summed == CHECKSUM_HW) { - ctrl = eor | len | DescOwn | IPCS; + ctrl = eor | len | DescOwn; + + if (mss) + ctrl |= LargeSend | + ((mss & MSSMask) << MSSShift); + else if (skb->ip_summed == CHECKSUM_HW) { if (ip->protocol == IPPROTO_TCP) - ctrl |= TCPCS; + ctrl |= IPCS | TCPCS; else if (ip->protocol == IPPROTO_UDP) - ctrl |= UDPCS; + ctrl |= IPCS | UDPCS; else BUG(); - } else - ctrl = eor | len | DescOwn; + } if (frag == skb_shinfo(skb)->nr_frags - 1) ctrl |= LastFrag; @@ -861,7 +889,7 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev) cp->tx_skb[entry].skb = skb; cp->tx_skb[entry].mapping = mapping; - cp->tx_skb[entry].frag = frag + 2; + cp->tx_skb[entry].len = len; entry = NEXT_TX(entry); } @@ -1075,7 +1103,6 @@ static int cp_refill_rx (struct cp_private *cp) cp->rx_skb[i].mapping = pci_map_single(cp->pdev, skb->tail, cp->rx_buf_sz, PCI_DMA_FROMDEVICE); cp->rx_skb[i].skb = skb; - cp->rx_skb[i].frag = 0; cp->rx_ring[i].opts2 = 0; cp->rx_ring[i].addr = cpu_to_le64(cp->rx_skb[i].mapping); @@ -1127,9 +1154,6 @@ static void cp_clean_rings (struct cp_private *cp) { unsigned i; - memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE); - memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE); - for (i = 0; i < CP_RX_RING_SIZE; i++) { if (cp->rx_skb[i].skb) { pci_unmap_single(cp->pdev, cp->rx_skb[i].mapping, @@ -1141,13 +1165,18 @@ static void cp_clean_rings (struct cp_private *cp) for (i = 0; i < CP_TX_RING_SIZE; i++) { if (cp->tx_skb[i].skb) { struct sk_buff *skb = cp->tx_skb[i].skb; + pci_unmap_single(cp->pdev, cp->tx_skb[i].mapping, - skb->len, PCI_DMA_TODEVICE); - dev_kfree_skb(skb); + cp->tx_skb[i].len, PCI_DMA_TODEVICE); + if (le32_to_cpu(cp->tx_ring[i].opts1) & LastFrag) + dev_kfree_skb(skb); cp->net_stats.tx_dropped++; } } + memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE); + memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE); + memset(&cp->rx_skb, 0, sizeof(struct ring_info) * CP_RX_RING_SIZE); memset(&cp->tx_skb, 0, sizeof(struct ring_info) * CP_TX_RING_SIZE); } @@ -1539,6 +1568,8 @@ static struct ethtool_ops cp_ethtool_ops = { .set_tx_csum = ethtool_op_set_tx_csum, /* local! */ .get_sg = ethtool_op_get_sg, .set_sg = ethtool_op_set_sg, + .get_tso = ethtool_op_get_tso, + .set_tso = ethtool_op_set_tso, .get_regs = cp_get_regs, .get_wol = cp_get_wol, .set_wol = cp_set_wol, @@ -1750,6 +1781,9 @@ static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) dev->get_stats = cp_get_stats; dev->do_ioctl = cp_ioctl; dev->poll = cp_rx_poll; +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = cp_poll_controller; +#endif dev->weight = 16; /* arbitrary? from NAPI_HOWTO.txt. */ #ifdef BROKEN dev->change_mtu = cp_change_mtu; @@ -1769,6 +1803,10 @@ static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) if (pci_using_dac) dev->features |= NETIF_F_HIGHDMA; +#if 0 /* disabled by default until verified */ + dev->features |= NETIF_F_TSO; +#endif + dev->irq = pdev->irq; rc = register_netdev(dev); |