[PATCH 1/3] sky2: tx pause bug fix

[PATCH 1/3] sky2: tx pause bug fix

[Stephen Hemminger]

Fix problems with transmit pause frames. The driver was telling the
GMAC to flush (not process) pause frames. Manually disabling pause wasn't
working because of problems in the setup.

This maybe the cause of the lockup under load.
	http://bugzilla.kernel.org/show_bug.cgi?id=6839

Patch against netdev-2.6 git tree

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>

---

 drivers/net/sky2.c |  123 ++++++++++++++++++----------------------------------
 drivers/net/sky2.h |    2 -
 2 files changed, 43 insertions(+), 82 deletions(-)

1419c8ab49f8fd56bad1ac0d3dcbaf830cd5a5d6
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 7ce0663..a3a4ab2 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -289,7 +289,7 @@ static void sky2_gmac_reset(struct sky2_
 static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
 {
 	struct sky2_port *sky2 = netdev_priv(hw->dev[port]);
-	u16 ctrl, ct1000, adv, pg, ledctrl, ledover;
+	u16 ctrl, ct1000, adv, pg, ledctrl, ledover, reg;
 
 	if (sky2->autoneg == AUTONEG_ENABLE &&
 	    !(hw->chip_id == CHIP_ID_YUKON_XL || hw->chip_id == CHIP_ID_YUKON_EC_U)) {
@@ -358,6 +358,7 @@ static void sky2_phy_init(struct sky2_hw
 	ctrl = 0;
 	ct1000 = 0;
 	adv = PHY_AN_CSMA;
+	reg = 0;
 
 	if (sky2->autoneg == AUTONEG_ENABLE) {
 		if (hw->copper) {
@@ -390,21 +391,46 @@ static void sky2_phy_init(struct sky2_hw
 		/* forced speed/duplex settings */
 		ct1000 = PHY_M_1000C_MSE;
 
-		if (sky2->duplex == DUPLEX_FULL)
-			ctrl |= PHY_CT_DUP_MD;
+		/* Disable auto update for duplex flow control and speed */
+		reg |= GM_GPCR_AU_ALL_DIS;
 
 		switch (sky2->speed) {
 		case SPEED_1000:
 			ctrl |= PHY_CT_SP1000;
+			reg |= GM_GPCR_SPEED_1000;
 			break;
 		case SPEED_100:
 			ctrl |= PHY_CT_SP100;
+			reg |= GM_GPCR_SPEED_100;
 			break;
 		}
 
+		if (sky2->duplex == DUPLEX_FULL) {
+			reg |= GM_GPCR_DUP_FULL;
+			ctrl |= PHY_CT_DUP_MD;
+		} else if (sky2->speed != SPEED_1000 && hw->chip_id != CHIP_ID_YUKON_EC_U) {
+			/* Turn off flow control for 10/100mbps */
+			sky2->rx_pause = 0;
+			sky2->tx_pause = 0;
+		}
+
+		if (!sky2->rx_pause)
+			reg |= GM_GPCR_FC_RX_DIS;
+
+		if (!sky2->tx_pause)
+			reg |= GM_GPCR_FC_TX_DIS;
+
+		/* Forward pause packets to GMAC? */
+		if (sky2->tx_pause || sky2->rx_pause)
+			sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_ON);
+		else
+			sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
+
 		ctrl |= PHY_CT_RESET;
 	}
 
+	gma_write16(hw, port, GM_GP_CTRL, reg);
+
 	if (hw->chip_id != CHIP_ID_YUKON_FE)
 		gm_phy_write(hw, port, PHY_MARV_1000T_CTRL, ct1000);
 
@@ -508,6 +534,7 @@ static void sky2_phy_init(struct sky2_hw
 			gm_phy_write(hw, port, PHY_MARV_LED_OVER, ledover);
 
 	}
+
 	/* Enable phy interrupt on auto-negotiation complete (or link up) */
 	if (sky2->autoneg == AUTONEG_ENABLE)
 		gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_IS_AN_COMPL);
@@ -570,49 +597,11 @@ static void sky2_mac_init(struct sky2_hw
 			 gm_phy_read(hw, 1, PHY_MARV_INT_MASK) != 0);
 	}
 
-	if (sky2->autoneg == AUTONEG_DISABLE) {
-		reg = gma_read16(hw, port, GM_GP_CTRL);
-		reg |= GM_GPCR_AU_ALL_DIS;
-		gma_write16(hw, port, GM_GP_CTRL, reg);
-		gma_read16(hw, port, GM_GP_CTRL);
-
-		switch (sky2->speed) {
-		case SPEED_1000:
-			reg &= ~GM_GPCR_SPEED_100;
-			reg |= GM_GPCR_SPEED_1000;
-			break;
-		case SPEED_100:
-			reg &= ~GM_GPCR_SPEED_1000;
-			reg |= GM_GPCR_SPEED_100;
-			break;
-		case SPEED_10:
-			reg &= ~(GM_GPCR_SPEED_1000 | GM_GPCR_SPEED_100);
-			break;
-		}
-
-		if (sky2->duplex == DUPLEX_FULL)
-			reg |= GM_GPCR_DUP_FULL;
-
-		/* turn off pause in 10/100mbps half duplex */
-		else if (sky2->speed != SPEED_1000 &&
-			 hw->chip_id != CHIP_ID_YUKON_EC_U)
-			sky2->tx_pause = sky2->rx_pause = 0;
-	} else
-		reg = GM_GPCR_SPEED_1000 | GM_GPCR_SPEED_100 | GM_GPCR_DUP_FULL;
-
-	if (!sky2->tx_pause && !sky2->rx_pause) {
-		sky2_write32(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
-		reg |=
-		    GM_GPCR_FC_TX_DIS | GM_GPCR_FC_RX_DIS | GM_GPCR_AU_FCT_DIS;
-	} else if (sky2->tx_pause && !sky2->rx_pause) {
-		/* disable Rx flow-control */
-		reg |= GM_GPCR_FC_RX_DIS | GM_GPCR_AU_FCT_DIS;
-	}
-
-	gma_write16(hw, port, GM_GP_CTRL, reg);
-
 	sky2_read16(hw, SK_REG(port, GMAC_IRQ_SRC));
 
+	/* Enable Transmit FIFO Underrun */
+	sky2_write8(hw, SK_REG(port, GMAC_IRQ_MSK), GMAC_DEF_MSK);
+
 	spin_lock_bh(&sky2->phy_lock);
 	sky2_phy_init(hw, port);
 	spin_unlock_bh(&sky2->phy_lock);
@@ -1529,40 +1518,10 @@ static void sky2_link_up(struct sky2_por
 	unsigned port = sky2->port;
 	u16 reg;
 
-	/* Enable Transmit FIFO Underrun */
-	sky2_write8(hw, SK_REG(port, GMAC_IRQ_MSK), GMAC_DEF_MSK);
-
-	reg = gma_read16(hw, port, GM_GP_CTRL);
-	if (sky2->autoneg == AUTONEG_DISABLE) {
-		reg |= GM_GPCR_AU_ALL_DIS;
-
-		/* Is write/read necessary?  Copied from sky2_mac_init */
-		gma_write16(hw, port, GM_GP_CTRL, reg);
-		gma_read16(hw, port, GM_GP_CTRL);
-
-		switch (sky2->speed) {
-		case SPEED_1000:
-			reg &= ~GM_GPCR_SPEED_100;
-			reg |= GM_GPCR_SPEED_1000;
-			break;
-		case SPEED_100:
-			reg &= ~GM_GPCR_SPEED_1000;
-			reg |= GM_GPCR_SPEED_100;
-			break;
-		case SPEED_10:
-			reg &= ~(GM_GPCR_SPEED_1000 | GM_GPCR_SPEED_100);
-			break;
-		}
-	} else
-		reg &= ~GM_GPCR_AU_ALL_DIS;
-
-	if (sky2->duplex == DUPLEX_FULL || sky2->autoneg == AUTONEG_ENABLE)
-		reg |= GM_GPCR_DUP_FULL;
-
 	/* enable Rx/Tx */
+	reg = gma_read16(hw, port, GM_GP_CTRL);
 	reg |= GM_GPCR_RX_ENA | GM_GPCR_TX_ENA;
 	gma_write16(hw, port, GM_GP_CTRL, reg);
-	gma_read16(hw, port, GM_GP_CTRL);
 
 	gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_DEF_MSK);
 
@@ -1616,7 +1575,6 @@ static void sky2_link_down(struct sky2_p
 	reg = gma_read16(hw, port, GM_GP_CTRL);
 	reg &= ~(GM_GPCR_RX_ENA | GM_GPCR_TX_ENA);
 	gma_write16(hw, port, GM_GP_CTRL, reg);
-	gma_read16(hw, port, GM_GP_CTRL);	/* PCI post */
 
 	if (sky2->rx_pause && !sky2->tx_pause) {
 		/* restore Asymmetric Pause bit */
@@ -1633,6 +1591,7 @@ static void sky2_link_down(struct sky2_p
 
 	if (netif_msg_link(sky2))
 		printk(KERN_INFO PFX "%s: Link is down.\n", sky2->netdev->name);
+
 	sky2_phy_init(hw, port);
 }
 
@@ -1673,8 +1632,11 @@ static int sky2_autoneg_done(struct sky2
 	sky2->rx_pause = (aux & PHY_M_PS_RX_P_EN) != 0;
 	sky2->tx_pause = (aux & PHY_M_PS_TX_P_EN) != 0;
 
-	if ((sky2->tx_pause || sky2->rx_pause)
-	    && !(sky2->speed < SPEED_1000 && sky2->duplex == DUPLEX_HALF))
+	if (sky2->duplex == DUPLEX_HALF && sky2->speed != SPEED_1000
+	    && hw->chip_id != CHIP_ID_YUKON_EC_U)
+		sky2->rx_pause = sky2->tx_pause = 0;
+
+	if (sky2->rx_pause || sky2->tx_pause)
 		sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_ON);
 	else
 		sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
@@ -1700,7 +1662,7 @@ static void sky2_phy_intr(struct sky2_hw
 		printk(KERN_INFO PFX "%s: phy interrupt status 0x%x 0x%x\n",
 		       sky2->netdev->name, istatus, phystat);
 
-	if (istatus & PHY_M_IS_AN_COMPL) {
+	if (sky2->autoneg == AUTONEG_ENABLE && (istatus & PHY_M_IS_AN_COMPL)) {
 		if (sky2_autoneg_done(sky2, phystat) == 0)
 			sky2_link_up(sky2);
 		goto out;
@@ -2890,7 +2852,6 @@ static int sky2_set_pauseparam(struct ne
 			       struct ethtool_pauseparam *ecmd)
 {
 	struct sky2_port *sky2 = netdev_priv(dev);
-	int err = 0;
 
 	sky2->autoneg = ecmd->autoneg;
 	sky2->tx_pause = ecmd->tx_pause != 0;
@@ -2898,7 +2859,7 @@ static int sky2_set_pauseparam(struct ne
 
 	sky2_phy_reinit(sky2);
 
-	return err;
+	return 0;
 }
 
 static int sky2_get_coalesce(struct net_device *dev,
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index fa8af9f..a27194c 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -1566,7 +1566,7 @@ enum {
 
 	GMR_FS_ANY_ERR	= GMR_FS_RX_FF_OV | GMR_FS_CRC_ERR |
 			  GMR_FS_FRAGMENT | GMR_FS_LONG_ERR |
-		  	  GMR_FS_MII_ERR | GMR_FS_BAD_FC | GMR_FS_GOOD_FC |
+		  	  GMR_FS_MII_ERR | GMR_FS_BAD_FC |
 			  GMR_FS_UN_SIZE | GMR_FS_JABBER,
 };
 
-- 
1.2.4

Re: [PATCH 1/3] sky2: tx pause bug fix

[Andrew Hall]

Stephen,

After some serious testing, this patch seems to fix the lockup issue 
completely. I manually applied these changes against the 2.6.17.13 release.

----- Original Message ----- 
From: "Stephen Hemminger" <shemminger@osdl.org>
To: "Jeff Garzik" <jgarzik@pobox.com>
Cc: <netdev@vger.kernel.org>
Sent: Thursday, September 07, 2006 5:44 AM
Subject: [PATCH 1/3] sky2: tx pause bug fix


> Fix problems with transmit pause frames. The driver was telling the
> GMAC to flush (not process) pause frames. Manually disabling pause wasn't
> working because of problems in the setup.
>
> This maybe the cause of the lockup under load.
> http://bugzilla.kernel.org/show_bug.cgi?id=6839
>
> Patch against netdev-2.6 git tree
>
> Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
>
> ---
>
> drivers/net/sky2.c |  123 
> ++++++++++++++++++----------------------------------
> drivers/net/sky2.h |    2 -
> 2 files changed, 43 insertions(+), 82 deletions(-)
>
> 1419c8ab49f8fd56bad1ac0d3dcbaf830cd5a5d6
> diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
> index 7ce0663..a3a4ab2 100644
> --- a/drivers/net/sky2.c
> +++ b/drivers/net/sky2.c
> @@ -289,7 +289,7 @@ static void sky2_gmac_reset(struct sky2_
> static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
> {
>  struct sky2_port *sky2 = netdev_priv(hw->dev[port]);
> - u16 ctrl, ct1000, adv, pg, ledctrl, ledover;
> + u16 ctrl, ct1000, adv, pg, ledctrl, ledover, reg;
>
>  if (sky2->autoneg == AUTONEG_ENABLE &&
>      !(hw->chip_id == CHIP_ID_YUKON_XL || hw->chip_id == 
> CHIP_ID_YUKON_EC_U)) {
> @@ -358,6 +358,7 @@ static void sky2_phy_init(struct sky2_hw
>  ctrl = 0;
>  ct1000 = 0;
>  adv = PHY_AN_CSMA;
> + reg = 0;
>
>  if (sky2->autoneg == AUTONEG_ENABLE) {
>  if (hw->copper) {
> @@ -390,21 +391,46 @@ static void sky2_phy_init(struct sky2_hw
>  /* forced speed/duplex settings */
>  ct1000 = PHY_M_1000C_MSE;
>
> - if (sky2->duplex == DUPLEX_FULL)
> - ctrl |= PHY_CT_DUP_MD;
> + /* Disable auto update for duplex flow control and speed */
> + reg |= GM_GPCR_AU_ALL_DIS;
>
>  switch (sky2->speed) {
>  case SPEED_1000:
>  ctrl |= PHY_CT_SP1000;
> + reg |= GM_GPCR_SPEED_1000;
>  break;
>  case SPEED_100:
>  ctrl |= PHY_CT_SP100;
> + reg |= GM_GPCR_SPEED_100;
>  break;
>  }
>
> + if (sky2->duplex == DUPLEX_FULL) {
> + reg |= GM_GPCR_DUP_FULL;
> + ctrl |= PHY_CT_DUP_MD;
> + } else if (sky2->speed != SPEED_1000 && hw->chip_id != 
> CHIP_ID_YUKON_EC_U) {
> + /* Turn off flow control for 10/100mbps */
> + sky2->rx_pause = 0;
> + sky2->tx_pause = 0;
> + }
> +
> + if (!sky2->rx_pause)
> + reg |= GM_GPCR_FC_RX_DIS;
> +
> + if (!sky2->tx_pause)
> + reg |= GM_GPCR_FC_TX_DIS;
> +
> + /* Forward pause packets to GMAC? */
> + if (sky2->tx_pause || sky2->rx_pause)
> + sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_ON);
> + else
> + sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
> +
>  ctrl |= PHY_CT_RESET;
>  }
>
> + gma_write16(hw, port, GM_GP_CTRL, reg);
> +
>  if (hw->chip_id != CHIP_ID_YUKON_FE)
>  gm_phy_write(hw, port, PHY_MARV_1000T_CTRL, ct1000);
>
> @@ -508,6 +534,7 @@ static void sky2_phy_init(struct sky2_hw
>  gm_phy_write(hw, port, PHY_MARV_LED_OVER, ledover);
>
>  }
> +
>  /* Enable phy interrupt on auto-negotiation complete (or link up) */
>  if (sky2->autoneg == AUTONEG_ENABLE)
>  gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_IS_AN_COMPL);
> @@ -570,49 +597,11 @@ static void sky2_mac_init(struct sky2_hw
>  gm_phy_read(hw, 1, PHY_MARV_INT_MASK) != 0);
>  }
>
> - if (sky2->autoneg == AUTONEG_DISABLE) {
> - reg = gma_read16(hw, port, GM_GP_CTRL);
> - reg |= GM_GPCR_AU_ALL_DIS;
> - gma_write16(hw, port, GM_GP_CTRL, reg);
> - gma_read16(hw, port, GM_GP_CTRL);
> -
> - switch (sky2->speed) {
> - case SPEED_1000:
> - reg &= ~GM_GPCR_SPEED_100;
> - reg |= GM_GPCR_SPEED_1000;
> - break;
> - case SPEED_100:
> - reg &= ~GM_GPCR_SPEED_1000;
> - reg |= GM_GPCR_SPEED_100;
> - break;
> - case SPEED_10:
> - reg &= ~(GM_GPCR_SPEED_1000 | GM_GPCR_SPEED_100);
> - break;
> - }
> -
> - if (sky2->duplex == DUPLEX_FULL)
> - reg |= GM_GPCR_DUP_FULL;
> -
> - /* turn off pause in 10/100mbps half duplex */
> - else if (sky2->speed != SPEED_1000 &&
> - hw->chip_id != CHIP_ID_YUKON_EC_U)
> - sky2->tx_pause = sky2->rx_pause = 0;
> - } else
> - reg = GM_GPCR_SPEED_1000 | GM_GPCR_SPEED_100 | GM_GPCR_DUP_FULL;
> -
> - if (!sky2->tx_pause && !sky2->rx_pause) {
> - sky2_write32(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
> - reg |=
> -     GM_GPCR_FC_TX_DIS | GM_GPCR_FC_RX_DIS | GM_GPCR_AU_FCT_DIS;
> - } else if (sky2->tx_pause && !sky2->rx_pause) {
> - /* disable Rx flow-control */
> - reg |= GM_GPCR_FC_RX_DIS | GM_GPCR_AU_FCT_DIS;
> - }
> -
> - gma_write16(hw, port, GM_GP_CTRL, reg);
> -
>  sky2_read16(hw, SK_REG(port, GMAC_IRQ_SRC));
>
> + /* Enable Transmit FIFO Underrun */
> + sky2_write8(hw, SK_REG(port, GMAC_IRQ_MSK), GMAC_DEF_MSK);
> +
>  spin_lock_bh(&sky2->phy_lock);
>  sky2_phy_init(hw, port);
>  spin_unlock_bh(&sky2->phy_lock);
> @@ -1529,40 +1518,10 @@ static void sky2_link_up(struct sky2_por
>  unsigned port = sky2->port;
>  u16 reg;
>
> - /* Enable Transmit FIFO Underrun */
> - sky2_write8(hw, SK_REG(port, GMAC_IRQ_MSK), GMAC_DEF_MSK);
> -
> - reg = gma_read16(hw, port, GM_GP_CTRL);
> - if (sky2->autoneg == AUTONEG_DISABLE) {
> - reg |= GM_GPCR_AU_ALL_DIS;
> -
> - /* Is write/read necessary?  Copied from sky2_mac_init */
> - gma_write16(hw, port, GM_GP_CTRL, reg);
> - gma_read16(hw, port, GM_GP_CTRL);
> -
> - switch (sky2->speed) {
> - case SPEED_1000:
> - reg &= ~GM_GPCR_SPEED_100;
> - reg |= GM_GPCR_SPEED_1000;
> - break;
> - case SPEED_100:
> - reg &= ~GM_GPCR_SPEED_1000;
> - reg |= GM_GPCR_SPEED_100;
> - break;
> - case SPEED_10:
> - reg &= ~(GM_GPCR_SPEED_1000 | GM_GPCR_SPEED_100);
> - break;
> - }
> - } else
> - reg &= ~GM_GPCR_AU_ALL_DIS;
> -
> - if (sky2->duplex == DUPLEX_FULL || sky2->autoneg == AUTONEG_ENABLE)
> - reg |= GM_GPCR_DUP_FULL;
> -
>  /* enable Rx/Tx */
> + reg = gma_read16(hw, port, GM_GP_CTRL);
>  reg |= GM_GPCR_RX_ENA | GM_GPCR_TX_ENA;
>  gma_write16(hw, port, GM_GP_CTRL, reg);
> - gma_read16(hw, port, GM_GP_CTRL);
>
>  gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_DEF_MSK);
>
> @@ -1616,7 +1575,6 @@ static void sky2_link_down(struct sky2_p
>  reg = gma_read16(hw, port, GM_GP_CTRL);
>  reg &= ~(GM_GPCR_RX_ENA | GM_GPCR_TX_ENA);
>  gma_write16(hw, port, GM_GP_CTRL, reg);
> - gma_read16(hw, port, GM_GP_CTRL); /* PCI post */
>
>  if (sky2->rx_pause && !sky2->tx_pause) {
>  /* restore Asymmetric Pause bit */
> @@ -1633,6 +1591,7 @@ static void sky2_link_down(struct sky2_p
>
>  if (netif_msg_link(sky2))
>  printk(KERN_INFO PFX "%s: Link is down.\n", sky2->netdev->name);
> +
>  sky2_phy_init(hw, port);
> }
>
> @@ -1673,8 +1632,11 @@ static int sky2_autoneg_done(struct sky2
>  sky2->rx_pause = (aux & PHY_M_PS_RX_P_EN) != 0;
>  sky2->tx_pause = (aux & PHY_M_PS_TX_P_EN) != 0;
>
> - if ((sky2->tx_pause || sky2->rx_pause)
> -     && !(sky2->speed < SPEED_1000 && sky2->duplex == DUPLEX_HALF))
> + if (sky2->duplex == DUPLEX_HALF && sky2->speed != SPEED_1000
> +     && hw->chip_id != CHIP_ID_YUKON_EC_U)
> + sky2->rx_pause = sky2->tx_pause = 0;
> +
> + if (sky2->rx_pause || sky2->tx_pause)
>  sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_ON);
>  else
>  sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
> @@ -1700,7 +1662,7 @@ static void sky2_phy_intr(struct sky2_hw
>  printk(KERN_INFO PFX "%s: phy interrupt status 0x%x 0x%x\n",
>         sky2->netdev->name, istatus, phystat);
>
> - if (istatus & PHY_M_IS_AN_COMPL) {
> + if (sky2->autoneg == AUTONEG_ENABLE && (istatus & PHY_M_IS_AN_COMPL)) {
>  if (sky2_autoneg_done(sky2, phystat) == 0)
>  sky2_link_up(sky2);
>  goto out;
> @@ -2890,7 +2852,6 @@ static int sky2_set_pauseparam(struct ne
>         struct ethtool_pauseparam *ecmd)
> {
>  struct sky2_port *sky2 = netdev_priv(dev);
> - int err = 0;
>
>  sky2->autoneg = ecmd->autoneg;
>  sky2->tx_pause = ecmd->tx_pause != 0;
> @@ -2898,7 +2859,7 @@ static int sky2_set_pauseparam(struct ne
>
>  sky2_phy_reinit(sky2);
>
> - return err;
> + return 0;
> }
>
> static int sky2_get_coalesce(struct net_device *dev,
> diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
> index fa8af9f..a27194c 100644
> --- a/drivers/net/sky2.h
> +++ b/drivers/net/sky2.h
> @@ -1566,7 +1566,7 @@ enum {
>
>  GMR_FS_ANY_ERR = GMR_FS_RX_FF_OV | GMR_FS_CRC_ERR |
>    GMR_FS_FRAGMENT | GMR_FS_LONG_ERR |
> -     GMR_FS_MII_ERR | GMR_FS_BAD_FC | GMR_FS_GOOD_FC |
> +     GMR_FS_MII_ERR | GMR_FS_BAD_FC |
>    GMR_FS_UN_SIZE | GMR_FS_JABBER,
> };
>
> -- 
> 1.2.4
>
> -
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html 

Re: [PATCH 1/3] sky2: tx pause bug fix

[Jeff Garzik]

Stephen Hemminger wrote:
> Fix problems with transmit pause frames. The driver was telling the
> GMAC to flush (not process) pause frames. Manually disabling pause wasn't
> working because of problems in the setup.
> 
> This maybe the cause of the lockup under load.
> 	http://bugzilla.kernel.org/show_bug.cgi?id=6839
> 
> Patch against netdev-2.6 git tree
> 
> Signed-off-by: Stephen Hemminger <shemminger@osdl.org>

Is this for #upstream (2.6.19) or #upstream-fixes (2.6.18-rc)?

It looks OK for #upstream, but too intrusive for #upstream-fixes.

	Jeff

Re: [PATCH 1/3] sky2: tx pause bug fix

[Jeff Garzik]

since I didn't hear back on my question from yesterday, and since 2.6.18 
is very close, I applied this series to netdev#upstream

	Jeff

Re: [PATCH 1/3] sky2: tx pause bug fix

[Stephen Hemminger]

On Mon, 11 Sep 2006 11:35:11 +1000
"Andrew Hall" <andrew.hall@bluereefnetworks.com> wrote:

> Stephen,
> 
> After some serious testing, this patch seems to fix the lockup issue 
> completely. I manually applied these changes against the 2.6.17.13 release.

Any more problems?

Re: [PATCH 1/3] sky2: tx pause bug fix

[Andrew Hall]

Not that I've been able to uncover.

Thanks for fixing this..

----- Original Message ----- 
From: "Stephen Hemminger" <shemminger@osdl.org>
To: "Andrew Hall" <andrew.hall@bluereefnetworks.com>
Cc: <netdev@vger.kernel.org>
Sent: Wednesday, September 20, 2006 6:31 AM
Subject: Re: [PATCH 1/3] sky2: tx pause bug fix


> On Mon, 11 Sep 2006 11:35:11 +1000
> "Andrew Hall" <andrew.hall@bluereefnetworks.com> wrote:
>
>> Stephen,
>>
>> After some serious testing, this patch seems to fix the lockup issue
>> completely. I manually applied these changes against the 2.6.17.13 
>> release.
>
> Any more problems?
> -
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html 

Re: [PATCH 1/3] sky2: tx pause bug fix

[Andrew Hall]

Unfortunately I spoke too soon.. :-(

The driver no longer appears to fail under load but still fails randomly 
with relatively light load:

Sep 22 07:04:38 localhost syslog.info -- MARK --
Sep 22 07:24:38 localhost syslog.info -- MARK --
Sep 22 07:31:52 localhost user.info kernel: NETDEV WATCHDOG: eth1: transmit 
timed out
Sep 22 07:31:52 localhost user.err kernel: sky2 eth1: tx timeout
Sep 22 07:31:52 localhost user.debug kernel: sky2 eth1: transmit ring 27 .. 
498 report=27 done=27
Sep 22 07:31:52 localhost user.info kernel: sky2 hardware hung? flushing
Sep 22 07:39:27 localhost user.info kernel: NETDEV WATCHDOG: eth1: transmit 
timed out
Sep 22 07:39:27 localhost user.err kernel: sky2 eth1: tx timeout
Sep 22 07:39:27 localhost user.debug kernel: sky2 eth1: transmit ring 498 .. 
457 report=27 done=27
Sep 22 07:39:27 localhost user.info kernel: sky2 status report lost?
Sep 22 07:40:07 localhost user.info kernel: NETDEV WATCHDOG: eth1: transmit 
timed out
Sep 22 07:40:07 localhost user.err kernel: sky2 eth1: tx timeout
Sep 22 07:40:07 localhost user.debug kernel: sky2 eth1: transmit ring 27 .. 
498 report=27 done=27
Sep 22 07:40:07 localhost user.info kernel: sky2 hardware hung? flushing

The driver version that I am using is 1.6.1 with the tx pause bug fix 
manually applied. This is compiled against 2.6.17.13 stock.

This fault (since releasing this version into production) has now occured in 
3 sites since upgrading them yesterday. The previous version of kernel that 
was being used was 2.6.12 (based on the old sk98lin driver) which didn't 
manifest any of these problems.

If there's anything I can do to help isolate this issue please let me know.

----- Original Message ----- 
From: "Stephen Hemminger" <shemminger@osdl.org>
To: "Andrew Hall" <andrew.hall@bluereefnetworks.com>
Cc: <netdev@vger.kernel.org>
Sent: Wednesday, September 20, 2006 6:31 AM
Subject: Re: [PATCH 1/3] sky2: tx pause bug fix


> On Mon, 11 Sep 2006 11:35:11 +1000
> "Andrew Hall" <andrew.hall@bluereefnetworks.com> wrote:
>
>> Stephen,
>>
>> After some serious testing, this patch seems to fix the lockup issue
>> completely. I manually applied these changes against the 2.6.17.13 
>> release.
>
> Any more problems? 

Re: [PATCH 1/3] sky2: tx pause bug fix

[Larry Finger]

Andrew Hall wrote:
> Unfortunately I spoke too soon.. :-(
> 
> The driver no longer appears to fail under load but still fails randomly 
> with relatively light load:
> 

I don't know if this will help, but NETDEV watchdog timeouts in the bcm43xx driver were fixed by 
changing a netif_stop_queue call into a netif_tx_disable. Why wrapping the stop_queue inside 
netif_tx_lock_bh/netif_tx_unlock_bh pairs works is beyond me, but ...

Larry

Re: [PATCH 1/3] sky2: tx pause bug fix

[Andrew Hall]

>
> If there's anything I can do to help isolate this issue please let me 
> know.
>

Looking through the logs I'm also intermittently seeing some of this:

sky2 eth1: rx error, status 0x7ffc0001 length 844

I'm not sure if it's related to the TX issue but I thought I'd mention it.

Re: [PATCH 1/3] sky2: tx pause bug fix

[Stephen Hemminger]

On Fri, 22 Sep 2006 18:40:00 +1000
"Andrew Hall" <andrew.hall@bluereefnetworks.com> wrote:

> >
> > If there's anything I can do to help isolate this issue please let me 
> > know.
> >
> 
> Looking through the logs I'm also intermittently seeing some of this:
> 
> sky2 eth1: rx error, status 0x7ffc0001 length 844

That means the driver is getting receive fifo overflows. You must
not be using receive flow control.

The driver takes no special action when this occurs. It isn't clear (even from
the documentation), what is supposed to be done.

-- 
Stephen Hemminger <shemminger@osdl.org>