From b6d0773fa7943fd93d564056395a7ff29b81213b Mon Sep 17 00:00:00 2001 From: Ayaz Abdulla Date: Sat, 10 Jun 2006 22:47:42 -0400 Subject: [PATCH] [PATCH] forcedeth config: flow control This patch allows for configurable flow control through ethtool support. Signed-Off-By: Ayaz Abdulla Signed-off-by: Jeff Garzik --- drivers/net/forcedeth.c | 233 ++++++++++++++++++++++++++++++---------- 1 file changed, 175 insertions(+), 58 deletions(-) diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c index f29a5b6f37d6..14e6da2c1bf4 100644 --- a/drivers/net/forcedeth.c +++ b/drivers/net/forcedeth.c @@ -519,6 +519,9 @@ typedef union _ring_type { #define NV_PAUSEFRAME_TX_CAPABLE 0x0002 #define NV_PAUSEFRAME_RX_ENABLE 0x0004 #define NV_PAUSEFRAME_TX_ENABLE 0x0008 +#define NV_PAUSEFRAME_RX_REQ 0x0010 +#define NV_PAUSEFRAME_TX_REQ 0x0020 +#define NV_PAUSEFRAME_AUTONEG 0x0040 /* MSI/MSI-X defines */ #define NV_MSI_X_MAX_VECTORS 8 @@ -1868,16 +1871,16 @@ static void nv_set_multicast(struct net_device *dev) u8 __iomem *base = get_hwbase(dev); u32 addr[2]; u32 mask[2]; - u32 pff; + u32 pff = readl(base + NvRegPacketFilterFlags) & NVREG_PFF_PAUSE_RX; memset(addr, 0, sizeof(addr)); memset(mask, 0, sizeof(mask)); if (dev->flags & IFF_PROMISC) { printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name); - pff = NVREG_PFF_PROMISC; + pff |= NVREG_PFF_PROMISC; } else { - pff = NVREG_PFF_MYADDR; + pff |= NVREG_PFF_MYADDR; if (dev->flags & IFF_ALLMULTI || dev->mc_list) { u32 alwaysOff[2]; @@ -1922,6 +1925,35 @@ static void nv_set_multicast(struct net_device *dev) spin_unlock_irq(&np->lock); } +void nv_update_pause(struct net_device *dev, u32 pause_flags) +{ + struct fe_priv *np = netdev_priv(dev); + u8 __iomem *base = get_hwbase(dev); + + np->pause_flags &= ~(NV_PAUSEFRAME_TX_ENABLE | NV_PAUSEFRAME_RX_ENABLE); + + if (np->pause_flags & NV_PAUSEFRAME_RX_CAPABLE) { + u32 pff = readl(base + NvRegPacketFilterFlags) & ~NVREG_PFF_PAUSE_RX; + if (pause_flags & NV_PAUSEFRAME_RX_ENABLE) { + writel(pff|NVREG_PFF_PAUSE_RX, base + NvRegPacketFilterFlags); + np->pause_flags |= NV_PAUSEFRAME_RX_ENABLE; + } else { + writel(pff, base + NvRegPacketFilterFlags); + } + } + if (np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE) { + u32 regmisc = readl(base + NvRegMisc1) & ~NVREG_MISC1_PAUSE_TX; + if (pause_flags & NV_PAUSEFRAME_TX_ENABLE) { + writel(NVREG_TX_PAUSEFRAME_ENABLE, base + NvRegTxPauseFrame); + writel(regmisc|NVREG_MISC1_PAUSE_TX, base + NvRegMisc1); + np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE; + } else { + writel(NVREG_TX_PAUSEFRAME_DISABLE, base + NvRegTxPauseFrame); + writel(regmisc, base + NvRegMisc1); + } + } +} + /** * nv_update_linkspeed: Setup the MAC according to the link partner * @dev: Network device to be configured @@ -1944,7 +1976,7 @@ static int nv_update_linkspeed(struct net_device *dev) int newdup = np->duplex; int mii_status; int retval = 0; - u32 control_1000, status_1000, phyreg; + u32 control_1000, status_1000, phyreg, pause_flags; /* BMSR_LSTATUS is latched, read it twice: * we want the current value. @@ -1990,6 +2022,11 @@ static int nv_update_linkspeed(struct net_device *dev) goto set_speed; } + adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ); + lpa = mii_rw(dev, np->phyaddr, MII_LPA, MII_READ); + dprintk(KERN_DEBUG "%s: nv_update_linkspeed: PHY advertises 0x%04x, lpa 0x%04x.\n", + dev->name, adv, lpa); + retval = 1; if (np->gigabit == PHY_GIGABIT) { control_1000 = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ); @@ -2005,11 +2042,6 @@ static int nv_update_linkspeed(struct net_device *dev) } } - adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ); - lpa = mii_rw(dev, np->phyaddr, MII_LPA, MII_READ); - dprintk(KERN_DEBUG "%s: nv_update_linkspeed: PHY advertises 0x%04x, lpa 0x%04x.\n", - dev->name, adv, lpa); - /* FIXME: handle parallel detection properly */ adv_lpa = lpa & adv; if (adv_lpa & LPA_100FULL) { @@ -2068,55 +2100,45 @@ static int nv_update_linkspeed(struct net_device *dev) writel(np->linkspeed, base + NvRegLinkSpeed); pci_push(base); - /* setup pause frame based on advertisement and link partner */ - np->pause_flags &= ~(NV_PAUSEFRAME_TX_ENABLE | NV_PAUSEFRAME_RX_ENABLE); - + pause_flags = 0; + /* setup pause frame */ if (np->duplex != 0) { - adv_pause = adv & (ADVERTISE_PAUSE_CAP| ADVERTISE_PAUSE_ASYM); - lpa_pause = lpa & (LPA_PAUSE_CAP| LPA_PAUSE_ASYM); + if (np->autoneg && np->pause_flags & NV_PAUSEFRAME_AUTONEG) { + adv_pause = adv & (ADVERTISE_PAUSE_CAP| ADVERTISE_PAUSE_ASYM); + lpa_pause = lpa & (LPA_PAUSE_CAP| LPA_PAUSE_ASYM); - switch (adv_pause) { - case (ADVERTISE_PAUSE_CAP): - if (lpa_pause & LPA_PAUSE_CAP) { - np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE | NV_PAUSEFRAME_RX_ENABLE; + switch (adv_pause) { + case (ADVERTISE_PAUSE_CAP): + if (lpa_pause & LPA_PAUSE_CAP) { + pause_flags |= NV_PAUSEFRAME_RX_ENABLE; + if (np->pause_flags & NV_PAUSEFRAME_TX_REQ) + pause_flags |= NV_PAUSEFRAME_TX_ENABLE; + } + break; + case (ADVERTISE_PAUSE_ASYM): + if (lpa_pause == (LPA_PAUSE_CAP| LPA_PAUSE_ASYM)) + { + pause_flags |= NV_PAUSEFRAME_TX_ENABLE; + } + break; + case (ADVERTISE_PAUSE_CAP| ADVERTISE_PAUSE_ASYM): + if (lpa_pause & LPA_PAUSE_CAP) + { + pause_flags |= NV_PAUSEFRAME_RX_ENABLE; + if (np->pause_flags & NV_PAUSEFRAME_TX_REQ) + pause_flags |= NV_PAUSEFRAME_TX_ENABLE; + } + if (lpa_pause == LPA_PAUSE_ASYM) + { + pause_flags |= NV_PAUSEFRAME_RX_ENABLE; + } + break; } - break; - case (ADVERTISE_PAUSE_ASYM): - if (lpa_pause == (LPA_PAUSE_CAP| LPA_PAUSE_ASYM)) - { - np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE; - } - break; - case (ADVERTISE_PAUSE_CAP| ADVERTISE_PAUSE_ASYM): - if (lpa_pause & LPA_PAUSE_CAP) - { - np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE | NV_PAUSEFRAME_RX_ENABLE; - } - if (lpa_pause == LPA_PAUSE_ASYM) - { - np->pause_flags |= NV_PAUSEFRAME_RX_ENABLE; - } - break; - } - } - - if (np->pause_flags & NV_PAUSEFRAME_RX_CAPABLE) { - u32 pff = readl(base + NvRegPacketFilterFlags) & ~NVREG_PFF_PAUSE_RX; - if (np->pause_flags & NV_PAUSEFRAME_RX_ENABLE) - writel(pff|NVREG_PFF_PAUSE_RX, base + NvRegPacketFilterFlags); - else - writel(pff, base + NvRegPacketFilterFlags); - } - if (np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE) { - u32 regmisc = readl(base + NvRegMisc1) & ~NVREG_MISC1_PAUSE_TX; - if (np->pause_flags & NV_PAUSEFRAME_TX_ENABLE) { - writel(NVREG_TX_PAUSEFRAME_ENABLE, base + NvRegTxPauseFrame); - writel(regmisc|NVREG_MISC1_PAUSE_TX, base + NvRegMisc1); } else { - writel(NVREG_TX_PAUSEFRAME_DISABLE, base + NvRegTxPauseFrame); - writel(regmisc, base + NvRegMisc1); + pause_flags = np->pause_flags; } } + nv_update_pause(dev, pause_flags); return retval; } @@ -2597,11 +2619,15 @@ static int nv_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd) if (ecmd->advertising & ADVERTISED_10baseT_Half) adv |= ADVERTISE_10HALF; if (ecmd->advertising & ADVERTISED_10baseT_Full) - adv |= ADVERTISE_10FULL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; + adv |= ADVERTISE_10FULL; if (ecmd->advertising & ADVERTISED_100baseT_Half) adv |= ADVERTISE_100HALF; if (ecmd->advertising & ADVERTISED_100baseT_Full) - adv |= ADVERTISE_100FULL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; + adv |= ADVERTISE_100FULL; + if (np->pause_flags & NV_PAUSEFRAME_RX_REQ) /* for rx we set both advertisments but disable tx pause */ + adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; + if (np->pause_flags & NV_PAUSEFRAME_TX_REQ) + adv |= ADVERTISE_PAUSE_ASYM; mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv); if (np->gigabit == PHY_GIGABIT) { @@ -2626,11 +2652,20 @@ static int nv_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd) if (ecmd->speed == SPEED_10 && ecmd->duplex == DUPLEX_HALF) adv |= ADVERTISE_10HALF; if (ecmd->speed == SPEED_10 && ecmd->duplex == DUPLEX_FULL) - adv |= ADVERTISE_10FULL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; + adv |= ADVERTISE_10FULL; if (ecmd->speed == SPEED_100 && ecmd->duplex == DUPLEX_HALF) adv |= ADVERTISE_100HALF; if (ecmd->speed == SPEED_100 && ecmd->duplex == DUPLEX_FULL) - adv |= ADVERTISE_100FULL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; + adv |= ADVERTISE_100FULL; + np->pause_flags &= ~(NV_PAUSEFRAME_AUTONEG|NV_PAUSEFRAME_RX_ENABLE|NV_PAUSEFRAME_TX_ENABLE); + if (np->pause_flags & NV_PAUSEFRAME_RX_REQ) {/* for rx we set both advertisments but disable tx pause */ + adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; + np->pause_flags |= NV_PAUSEFRAME_RX_ENABLE; + } + if (np->pause_flags & NV_PAUSEFRAME_TX_REQ) { + adv |= ADVERTISE_PAUSE_ASYM; + np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE; + } mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv); np->fixed_mode = adv; @@ -2856,6 +2891,86 @@ static int nv_set_ringparam(struct net_device *dev, struct ethtool_ringparam* ri return -ENOMEM; } +static void nv_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam* pause) +{ + struct fe_priv *np = netdev_priv(dev); + + pause->autoneg = (np->pause_flags & NV_PAUSEFRAME_AUTONEG) != 0; + pause->rx_pause = (np->pause_flags & NV_PAUSEFRAME_RX_ENABLE) != 0; + pause->tx_pause = (np->pause_flags & NV_PAUSEFRAME_TX_ENABLE) != 0; +} + +static int nv_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam* pause) +{ + struct fe_priv *np = netdev_priv(dev); + int adv, bmcr; + + if ((!np->autoneg && np->duplex == 0) || + (np->autoneg && !pause->autoneg && np->duplex == 0)) { + printk(KERN_INFO "%s: can not set pause settings when forced link is in half duplex.\n", + dev->name); + return -EINVAL; + } + if (pause->tx_pause && !(np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE)) { + printk(KERN_INFO "%s: hardware does not support tx pause frames.\n", dev->name); + return -EINVAL; + } + + netif_carrier_off(dev); + if (netif_running(dev)) { + nv_disable_irq(dev); + spin_lock_bh(&dev->xmit_lock); + spin_lock(&np->lock); + /* stop engines */ + nv_stop_rx(dev); + nv_stop_tx(dev); + spin_unlock(&np->lock); + spin_unlock_bh(&dev->xmit_lock); + } + + np->pause_flags &= ~(NV_PAUSEFRAME_RX_REQ|NV_PAUSEFRAME_TX_REQ); + if (pause->rx_pause) + np->pause_flags |= NV_PAUSEFRAME_RX_REQ; + if (pause->tx_pause) + np->pause_flags |= NV_PAUSEFRAME_TX_REQ; + + if (np->autoneg && pause->autoneg) { + np->pause_flags |= NV_PAUSEFRAME_AUTONEG; + + adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ); + adv &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM); + if (np->pause_flags & NV_PAUSEFRAME_RX_REQ) /* for rx we set both advertisments but disable tx pause */ + adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; + if (np->pause_flags & NV_PAUSEFRAME_TX_REQ) + adv |= ADVERTISE_PAUSE_ASYM; + mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv); + + if (netif_running(dev)) + printk(KERN_INFO "%s: link down.\n", dev->name); + bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ); + bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART); + mii_rw(dev, np->phyaddr, MII_BMCR, bmcr); + } else { + np->pause_flags &= ~(NV_PAUSEFRAME_AUTONEG|NV_PAUSEFRAME_RX_ENABLE|NV_PAUSEFRAME_TX_ENABLE); + if (pause->rx_pause) + np->pause_flags |= NV_PAUSEFRAME_RX_ENABLE; + if (pause->tx_pause) + np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE; + + if (!netif_running(dev)) + nv_update_linkspeed(dev); + else + nv_update_pause(dev, np->pause_flags); + } + + if (netif_running(dev)) { + nv_start_rx(dev); + nv_start_tx(dev); + nv_enable_irq(dev); + } + return 0; +} + static struct ethtool_ops ops = { .get_drvinfo = nv_get_drvinfo, .get_link = ethtool_op_get_link, @@ -2871,6 +2986,8 @@ static struct ethtool_ops ops = { .set_tso = nv_set_tso, .get_ringparam = nv_get_ringparam, .set_ringparam = nv_set_ringparam, + .get_pauseparam = nv_get_pauseparam, + .set_pauseparam = nv_set_pauseparam, }; static void nv_vlan_rx_register(struct net_device *dev, struct vlan_group *grp) @@ -3346,9 +3463,9 @@ static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_i np->msi_flags |= NV_MSI_X_CAPABLE; } - np->pause_flags = NV_PAUSEFRAME_RX_CAPABLE; + np->pause_flags = NV_PAUSEFRAME_RX_CAPABLE | NV_PAUSEFRAME_RX_REQ | NV_PAUSEFRAME_AUTONEG; if (id->driver_data & DEV_HAS_PAUSEFRAME_TX) { - np->pause_flags |= NV_PAUSEFRAME_TX_CAPABLE; + np->pause_flags |= NV_PAUSEFRAME_TX_CAPABLE | NV_PAUSEFRAME_TX_REQ; }