From eb91f61b2294ccdb914df255164ada70dbbf2d58 Mon Sep 17 00:00:00 2001 From: Ayaz Abdulla Date: Wed, 24 May 2006 18:13:19 -0400 Subject: [PATCH] [PATCH] forcedeth: add support for flow control This patch adds flow control support for tx and rx pause frames in forcedeth. Signed-Off-By: Ayaz Abdulla Signed-off-by: Jeff Garzik --- drivers/net/forcedeth.c | 139 ++++++++++++++++++++++++++++++---------- 1 file changed, 104 insertions(+), 35 deletions(-) diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c index 705e1229d8..cee25fe7e1 100644 --- a/drivers/net/forcedeth.c +++ b/drivers/net/forcedeth.c @@ -107,6 +107,7 @@ * 0.52: 20 Jan 2006: Add MSI/MSIX support. * 0.53: 19 Mar 2006: Fix init from low power mode and add hw reset. * 0.54: 21 Mar 2006: Fix spin locks for multi irqs and cleanup. + * 0.55: 22 Mar 2006: Add flow control (pause frame). * * Known bugs: * We suspect that on some hardware no TX done interrupts are generated. @@ -118,7 +119,7 @@ * DEV_NEED_TIMERIRQ will not harm you on sane hardware, only generating a few * superfluous timer interrupts from the nic. */ -#define FORCEDETH_VERSION "0.54" +#define FORCEDETH_VERSION "0.55" #define DRV_NAME "forcedeth" #include @@ -163,6 +164,7 @@ #define DEV_HAS_MSI 0x0040 /* device supports MSI */ #define DEV_HAS_MSI_X 0x0080 /* device supports MSI-X */ #define DEV_HAS_POWER_CNTRL 0x0100 /* device supports power savings */ +#define DEV_HAS_PAUSEFRAME_TX 0x0200 /* device supports tx pause frames */ enum { NvRegIrqStatus = 0x000, @@ -203,6 +205,7 @@ enum { NvRegMSIIrqMask = 0x030, #define NVREG_MSI_VECTOR_0_ENABLED 0x01 NvRegMisc1 = 0x080, +#define NVREG_MISC1_PAUSE_TX 0x01 #define NVREG_MISC1_HD 0x02 #define NVREG_MISC1_FORCE 0x3b0f3c @@ -214,7 +217,8 @@ enum { #define NVREG_XMITSTAT_BUSY 0x01 NvRegPacketFilterFlags = 0x8c, -#define NVREG_PFF_ALWAYS 0x7F0008 +#define NVREG_PFF_PAUSE_RX 0x08 +#define NVREG_PFF_ALWAYS 0x7F0000 #define NVREG_PFF_PROMISC 0x80 #define NVREG_PFF_MYADDR 0x20 @@ -277,6 +281,9 @@ enum { #define NVREG_TXRXCTL_VLANINS 0x00080 NvRegTxRingPhysAddrHigh = 0x148, NvRegRxRingPhysAddrHigh = 0x14C, + NvRegTxPauseFrame = 0x170, +#define NVREG_TX_PAUSEFRAME_DISABLE 0x1ff0080 +#define NVREG_TX_PAUSEFRAME_ENABLE 0x0c00030 NvRegMIIStatus = 0x180, #define NVREG_MIISTAT_ERROR 0x0001 #define NVREG_MIISTAT_LINKCHANGE 0x0008 @@ -506,13 +513,10 @@ typedef union _ring_type { #define PHY_1000 0x2 #define PHY_HALF 0x100 -/* FIXME: MII defines that should be added to */ -#define MII_1000BT_CR 0x09 -#define MII_1000BT_SR 0x0a -#define ADVERTISE_1000FULL 0x0200 -#define ADVERTISE_1000HALF 0x0100 -#define LPA_1000FULL 0x0800 -#define LPA_1000HALF 0x0400 +#define NV_PAUSEFRAME_RX_CAPABLE 0x0001 +#define NV_PAUSEFRAME_TX_CAPABLE 0x0002 +#define NV_PAUSEFRAME_RX_ENABLE 0x0004 +#define NV_PAUSEFRAME_TX_ENABLE 0x0008 /* MSI/MSI-X defines */ #define NV_MSI_X_MAX_VECTORS 8 @@ -602,6 +606,9 @@ struct fe_priv { /* msi/msi-x fields */ u32 msi_flags; struct msix_entry msi_x_entry[NV_MSI_X_MAX_VECTORS]; + + /* flow control */ + u32 pause_flags; }; /* @@ -860,7 +867,7 @@ static int phy_init(struct net_device *dev) /* set advertise register */ reg = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ); - reg |= (ADVERTISE_10HALF|ADVERTISE_10FULL|ADVERTISE_100HALF|ADVERTISE_100FULL|0x800|0x400); + reg |= (ADVERTISE_10HALF|ADVERTISE_10FULL|ADVERTISE_100HALF|ADVERTISE_100FULL|ADVERTISE_PAUSE_ASYM|ADVERTISE_PAUSE_CAP); if (mii_rw(dev, np->phyaddr, MII_ADVERTISE, reg)) { printk(KERN_INFO "%s: phy write to advertise failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; @@ -873,14 +880,14 @@ static int phy_init(struct net_device *dev) mii_status = mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ); if (mii_status & PHY_GIGABIT) { np->gigabit = PHY_GIGABIT; - mii_control_1000 = mii_rw(dev, np->phyaddr, MII_1000BT_CR, MII_READ); + mii_control_1000 = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ); mii_control_1000 &= ~ADVERTISE_1000HALF; if (phyinterface & PHY_RGMII) mii_control_1000 |= ADVERTISE_1000FULL; else mii_control_1000 &= ~ADVERTISE_1000FULL; - if (mii_rw(dev, np->phyaddr, MII_1000BT_CR, mii_control_1000)) { + if (mii_rw(dev, np->phyaddr, MII_CTRL1000, mii_control_1000)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } @@ -918,6 +925,8 @@ static int phy_init(struct net_device *dev) return PHY_ERROR; } } + /* some phys clear out pause advertisment on reset, set it back */ + mii_rw(dev, np->phyaddr, MII_ADVERTISE, reg); /* restart auto negotiation */ mii_control = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ); @@ -1550,7 +1559,6 @@ static void nv_rx_process(struct net_device *dev) u32 Flags; u32 vlanflags = 0; - for (;;) { struct sk_buff *skb; int len; @@ -1901,7 +1909,9 @@ static int nv_update_linkspeed(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u8 __iomem *base = get_hwbase(dev); - int adv, lpa; + int adv = 0; + int lpa = 0; + int adv_lpa, adv_pause, lpa_pause; int newls = np->linkspeed; int newdup = np->duplex; int mii_status; @@ -1954,8 +1964,8 @@ static int nv_update_linkspeed(struct net_device *dev) retval = 1; if (np->gigabit == PHY_GIGABIT) { - control_1000 = mii_rw(dev, np->phyaddr, MII_1000BT_CR, MII_READ); - status_1000 = mii_rw(dev, np->phyaddr, MII_1000BT_SR, MII_READ); + control_1000 = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ); + status_1000 = mii_rw(dev, np->phyaddr, MII_STAT1000, MII_READ); if ((control_1000 & ADVERTISE_1000FULL) && (status_1000 & LPA_1000FULL)) { @@ -1973,21 +1983,21 @@ static int nv_update_linkspeed(struct net_device *dev) dev->name, adv, lpa); /* FIXME: handle parallel detection properly */ - lpa = lpa & adv; - if (lpa & LPA_100FULL) { + adv_lpa = lpa & adv; + if (adv_lpa & LPA_100FULL) { newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_100; newdup = 1; - } else if (lpa & LPA_100HALF) { + } else if (adv_lpa & LPA_100HALF) { newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_100; newdup = 0; - } else if (lpa & LPA_10FULL) { + } else if (adv_lpa & LPA_10FULL) { newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10; newdup = 1; - } else if (lpa & LPA_10HALF) { + } else if (adv_lpa & LPA_10HALF) { newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10; newdup = 0; } else { - dprintk(KERN_DEBUG "%s: bad ability %04x - falling back to 10HD.\n", dev->name, lpa); + dprintk(KERN_DEBUG "%s: bad ability %04x - falling back to 10HD.\n", dev->name, adv_lpa); newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10; newdup = 0; } @@ -2030,6 +2040,56 @@ set_speed: 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); + + if (np->duplex != 0) { + 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; + } + 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); + } + } + return retval; } @@ -2441,7 +2501,7 @@ static int nv_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) if (adv & ADVERTISE_100FULL) ecmd->advertising |= ADVERTISED_100baseT_Full; if (np->autoneg && np->gigabit == PHY_GIGABIT) { - adv = mii_rw(dev, np->phyaddr, MII_1000BT_CR, MII_READ); + adv = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ); if (adv & ADVERTISE_1000FULL) ecmd->advertising |= ADVERTISED_1000baseT_Full; } @@ -2505,23 +2565,23 @@ static int nv_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd) /* advertise only what has been requested */ adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ); - adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4); + adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM); if (ecmd->advertising & ADVERTISED_10baseT_Half) adv |= ADVERTISE_10HALF; if (ecmd->advertising & ADVERTISED_10baseT_Full) - adv |= ADVERTISE_10FULL; + adv |= ADVERTISE_10FULL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; if (ecmd->advertising & ADVERTISED_100baseT_Half) adv |= ADVERTISE_100HALF; if (ecmd->advertising & ADVERTISED_100baseT_Full) - adv |= ADVERTISE_100FULL; + adv |= ADVERTISE_100FULL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv); if (np->gigabit == PHY_GIGABIT) { - adv = mii_rw(dev, np->phyaddr, MII_1000BT_CR, MII_READ); + adv = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ); adv &= ~ADVERTISE_1000FULL; if (ecmd->advertising & ADVERTISED_1000baseT_Full) adv |= ADVERTISE_1000FULL; - mii_rw(dev, np->phyaddr, MII_1000BT_CR, adv); + mii_rw(dev, np->phyaddr, MII_CTRL1000, adv); } bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ); @@ -2534,22 +2594,22 @@ static int nv_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd) np->autoneg = 0; adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ); - adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4); + adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM); if (ecmd->speed == SPEED_10 && ecmd->duplex == DUPLEX_HALF) adv |= ADVERTISE_10HALF; if (ecmd->speed == SPEED_10 && ecmd->duplex == DUPLEX_FULL) - adv |= ADVERTISE_10FULL; + adv |= ADVERTISE_10FULL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; if (ecmd->speed == SPEED_100 && ecmd->duplex == DUPLEX_HALF) adv |= ADVERTISE_100HALF; if (ecmd->speed == SPEED_100 && ecmd->duplex == DUPLEX_FULL) - adv |= ADVERTISE_100FULL; + adv |= ADVERTISE_100FULL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv); np->fixed_mode = adv; if (np->gigabit == PHY_GIGABIT) { - adv = mii_rw(dev, np->phyaddr, MII_1000BT_CR, MII_READ); + adv = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ); adv &= ~ADVERTISE_1000FULL; - mii_rw(dev, np->phyaddr, MII_1000BT_CR, adv); + mii_rw(dev, np->phyaddr, MII_CTRL1000, adv); } bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ); @@ -2813,6 +2873,9 @@ static int nv_open(struct net_device *dev) writel(0, base + NvRegAdapterControl); + if (np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE) + writel(NVREG_TX_PAUSEFRAME_DISABLE, base + NvRegTxPauseFrame); + /* 2) initialize descriptor rings */ set_bufsize(dev); oom = nv_init_ring(dev); @@ -3098,6 +3161,12 @@ 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; + if (id->driver_data & DEV_HAS_PAUSEFRAME_TX) { + np->pause_flags |= NV_PAUSEFRAME_TX_CAPABLE; + } + + err = -ENOMEM; np->base = ioremap(addr, np->register_size); if (!np->base) @@ -3358,11 +3427,11 @@ static struct pci_device_id pci_tbl[] = { }, { /* MCP55 Ethernet Controller */ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_14), - .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_VLAN|DEV_HAS_MSI|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL, + .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_VLAN|DEV_HAS_MSI|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX, }, { /* MCP55 Ethernet Controller */ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_15), - .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_VLAN|DEV_HAS_MSI|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL, + .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_VLAN|DEV_HAS_MSI|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX, }, {0,}, }; -- 2.39.5