---

yaml
---
r: 56560
b: refs/heads/master
c: d3a36fb
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8fd7d1b16ea0e1b3b0823ed91b58993d6c6a1cc6
+refs/heads/master: d3a36fb82a0864a85e238ac946817030a18c5f9a

trunk/Documentation/networking/netdevices.txt

@@ -49,7 +49,7 @@ dev->hard_start_xmit:
 	for this and return -1 when the spin lock fails. 
 	The locking there should also properly protect against 
 	set_multicast_list
-	Context: BHs disabled
+	Context: Process with BHs disabled or BH (timer).
 	Notes: netif_queue_stopped() is guaranteed false
                Interrupts must be enabled when calling hard_start_xmit.
                 (Interrupts must also be enabled when enabling the BH handler.)

trunk/drivers/net/e1000/e1000.h

@@ -333,11 +333,9 @@ struct e1000_adapter {
 	struct e1000_tx_ring test_tx_ring;
 	struct e1000_rx_ring test_rx_ring;
 
-
 	int msg_enable;
-#ifdef CONFIG_PCI_MSI
 	boolean_t have_msi;
-#endif
+
 	/* to not mess up cache alignment, always add to the bottom */
 	boolean_t tso_force;
 	boolean_t smart_power_down;	/* phy smart power down */

trunk/drivers/net/e1000/e1000_main.c

@@ -158,9 +158,7 @@ static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 static int e1000_set_mac(struct net_device *netdev, void *p);
 static irqreturn_t e1000_intr(int irq, void *data);
-#ifdef CONFIG_PCI_MSI
 static irqreturn_t e1000_intr_msi(int irq, void *data);
-#endif
 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
                                     struct e1000_tx_ring *tx_ring);
 #ifdef CONFIG_E1000_NAPI
@@ -300,31 +298,26 @@ module_exit(e1000_exit_module);
 static int e1000_request_irq(struct e1000_adapter *adapter)
 {
 	struct net_device *netdev = adapter->netdev;
-	int flags, err = 0;
+	void (*handler) = &e1000_intr;
+	int irq_flags = IRQF_SHARED;
+	int err;
 
-	flags = IRQF_SHARED;
-#ifdef CONFIG_PCI_MSI
 	if (adapter->hw.mac_type >= e1000_82571) {
-		adapter->have_msi = TRUE;
-		if ((err = pci_enable_msi(adapter->pdev))) {
-			DPRINTK(PROBE, ERR,
-			 "Unable to allocate MSI interrupt Error: %d\n", err);
-			adapter->have_msi = FALSE;
+		adapter->have_msi = !pci_enable_msi(adapter->pdev);
+		if (adapter->have_msi) {
+			handler = &e1000_intr_msi;
+			irq_flags = 0;
 		}
 	}
-	if (adapter->have_msi) {
-		flags &= ~IRQF_SHARED;
-		err = request_irq(adapter->pdev->irq, &e1000_intr_msi, flags,
-		                  netdev->name, netdev);
-		if (err)
-			DPRINTK(PROBE, ERR,
-			       "Unable to allocate interrupt Error: %d\n", err);
-	} else
-#endif
-	if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
-	                       netdev->name, netdev)))
+
+	err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
+	                  netdev);
+	if (err) {
+		if (adapter->have_msi)
+			pci_disable_msi(adapter->pdev);
 		DPRINTK(PROBE, ERR,
 		        "Unable to allocate interrupt Error: %d\n", err);
+	}
 
 	return err;
 }
@@ -335,10 +328,8 @@ static void e1000_free_irq(struct e1000_adapter *adapter)
 
 	free_irq(adapter->pdev->irq, netdev);
 
-#ifdef CONFIG_PCI_MSI
 	if (adapter->have_msi)
 		pci_disable_msi(adapter->pdev);
-#endif
 }
 
 /**
@@ -3744,7 +3735,6 @@ e1000_update_stats(struct e1000_adapter *adapter)
 
 	spin_unlock_irqrestore(&adapter->stats_lock, flags);
 }
-#ifdef CONFIG_PCI_MSI
 
 /**
  * e1000_intr_msi - Interrupt Handler
@@ -3810,7 +3800,6 @@ e1000_intr_msi(int irq, void *data)
 
 	return IRQ_HANDLED;
 }
-#endif
 
 /**
  * e1000_intr - Interrupt Handler

trunk/drivers/net/gianfar.c

@@ -1025,6 +1025,15 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	dev->trans_start = jiffies;
 
+	/* The powerpc-specific eieio() is used, as wmb() has too strong
+	 * semantics (it requires synchronization between cacheable and
+	 * uncacheable mappings, which eieio doesn't provide and which we
+	 * don't need), thus requiring a more expensive sync instruction.  At
+	 * some point, the set of architecture-independent barrier functions
+	 * should be expanded to include weaker barriers.
+	 */
+
+	eieio();
 	txbdp->status = status;
 
 	/* If this was the last BD in the ring, the next one */
@@ -1301,6 +1310,7 @@ struct sk_buff * gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp)
 	bdp->length = 0;
 
 	/* Mark the buffer empty */
+	eieio();
 	bdp->status |= (RXBD_EMPTY | RXBD_INTERRUPT);
 
 	return skb;
@@ -1484,6 +1494,7 @@ int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit)
 	bdp = priv->cur_rx;
 
 	while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) {
+		rmb();
 		skb = priv->rx_skbuff[priv->skb_currx];
 
 		if (!(bdp->status &

trunk/drivers/net/ibm_emac/ibm_emac_core.c

@@ -926,7 +926,7 @@ static int emac_link_differs(struct ocp_enet_private *dev)
 	int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
 	int speed, pause, asym_pause;
 
-	if (r & (EMAC_MR1_MF_1000 | EMAC_MR1_MF_1000GPCS))
+	if (r & EMAC_MR1_MF_1000)
 		speed = SPEED_1000;
 	else if (r & EMAC_MR1_MF_100)
 		speed = SPEED_100;

trunk/drivers/net/ibm_emac/ibm_emac_mal.c

@@ -59,8 +59,7 @@ int __init mal_register_commac(struct ibm_ocp_mal *mal,
 	return 0;
 }
 
-void __exit mal_unregister_commac(struct ibm_ocp_mal *mal,
-				  struct mal_commac *commac)
+void mal_unregister_commac(struct ibm_ocp_mal *mal, struct mal_commac *commac)
 {
 	unsigned long flags;
 	local_irq_save(flags);

trunk/drivers/net/ibm_emac/ibm_emac_mal.h

@@ -223,8 +223,7 @@ void mal_exit(void) __exit;
 
 int mal_register_commac(struct ibm_ocp_mal *mal,
 			struct mal_commac *commac) __init;
-void mal_unregister_commac(struct ibm_ocp_mal *mal,
-			   struct mal_commac *commac) __exit;
+void mal_unregister_commac(struct ibm_ocp_mal *mal, struct mal_commac *commac);
 int mal_set_rcbs(struct ibm_ocp_mal *mal, int channel, unsigned long size);
 
 /* Returns BD ring offset for a particular channel

trunk/drivers/net/ibm_emac/ibm_emac_phy.c

@@ -22,6 +22,7 @@
 
 #include <asm/ocp.h>
 
+#include "ibm_emac_core.h"
 #include "ibm_emac_phy.h"
 
 static inline int phy_read(struct mii_phy *phy, int reg)
@@ -34,28 +35,51 @@ static inline void phy_write(struct mii_phy *phy, int reg, int val)
 	phy->mdio_write(phy->dev, phy->address, reg, val);
 }
 
-int mii_reset_phy(struct mii_phy *phy)
+/*
+ * polls MII_BMCR until BMCR_RESET bit clears or operation times out.
+ *
+ * returns:
+ *	>= 0 => success, value in BMCR returned to caller
+ *	-EBUSY => failure, RESET bit never cleared
+ *	otherwise => failure, lower level PHY read failed
+ */
+static int mii_spin_reset_complete(struct mii_phy *phy)
 {
 	int val;
 	int limit = 10000;
 
+	while (limit--) {
+		val = phy_read(phy, MII_BMCR);
+		if (val >= 0 && !(val & BMCR_RESET))
+			return val;	/* success */
+		udelay(10);
+	}
+	if (val & BMCR_RESET)
+		val = -EBUSY;
+
+	if (net_ratelimit())
+		printk(KERN_ERR "emac%d: PHY reset timeout (%d)\n", 
+		       ((struct ocp_enet_private *)phy->dev->priv)->def->index,
+		       val);
+	return val;		    
+}
+
+int mii_reset_phy(struct mii_phy *phy)
+{
+	int val;
+
 	val = phy_read(phy, MII_BMCR);
 	val &= ~BMCR_ISOLATE;
 	val |= BMCR_RESET;
 	phy_write(phy, MII_BMCR, val);
 
 	udelay(300);
 
-	while (limit--) {
-		val = phy_read(phy, MII_BMCR);
-		if (val >= 0 && (val & BMCR_RESET) == 0)
-			break;
-		udelay(10);
-	}
-	if ((val & BMCR_ISOLATE) && limit > 0)
+	val = mii_spin_reset_complete(phy);
+	if (val >= 0 && (val & BMCR_ISOLATE))
 		phy_write(phy, MII_BMCR, val & ~BMCR_ISOLATE);
 
-	return limit <= 0;
+	return val < 0;
 }
 
 static int genmii_setup_aneg(struct mii_phy *phy, u32 advertise)
@@ -102,8 +126,14 @@ static int genmii_setup_aneg(struct mii_phy *phy, u32 advertise)
 	}
 
 	/* Start/Restart aneg */
-	ctl = phy_read(phy, MII_BMCR);
-	ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
+	/* on some PHYs (e.g. National DP83843) a write to MII_ADVERTISE
+	 * causes BMCR_RESET to be set on the next read of MII_BMCR, which
+	 * if not checked for causes the PHY to be reset below */
+	ctl = mii_spin_reset_complete(phy);
+	if (ctl < 0)
+		return ctl;
+
+	ctl |= BMCR_ANENABLE | BMCR_ANRESTART;
 	phy_write(phy, MII_BMCR, ctl);
 
 	return 0;
@@ -118,13 +148,13 @@ static int genmii_setup_forced(struct mii_phy *phy, int speed, int fd)
 	phy->duplex = fd;
 	phy->pause = phy->asym_pause = 0;
 
+	/* First reset the PHY */
+	mii_reset_phy(phy);
+
 	ctl = phy_read(phy, MII_BMCR);
 	if (ctl < 0)
 		return ctl;
-	ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_ANENABLE);
-
-	/* First reset the PHY */
-	phy_write(phy, MII_BMCR, ctl | BMCR_RESET);
+	ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_ANENABLE | BMCR_SPEED1000);
 
 	/* Select speed & duplex */
 	switch (speed) {

trunk/drivers/net/ibm_emac/ibm_emac_rgmii.c

@@ -162,7 +162,7 @@ void rgmii_set_speed(struct ocp_device *ocpdev, int input, int speed)
 	out_be32(&dev->base->ssr, ssr);
 }
 
-void __exit __rgmii_fini(struct ocp_device *ocpdev, int input)
+void __rgmii_fini(struct ocp_device *ocpdev, int input)
 {
 	struct ibm_ocp_rgmii *dev = ocp_get_drvdata(ocpdev);
 	BUG_ON(!dev || dev->users == 0);

trunk/drivers/net/ibm_emac/ibm_emac_rgmii.h

@@ -37,7 +37,7 @@ struct ibm_ocp_rgmii {
 #ifdef CONFIG_IBM_EMAC_RGMII
 int rgmii_attach(void *emac) __init;
 
-void __rgmii_fini(struct ocp_device *ocpdev, int input) __exit;
+void __rgmii_fini(struct ocp_device *ocpdev, int input);
 static inline void rgmii_fini(struct ocp_device *ocpdev, int input)
 {
 	if (ocpdev)

trunk/drivers/net/ibm_emac/ibm_emac_tah.c

@@ -63,7 +63,7 @@ int __init tah_attach(void *emac)
 	return 0;
 }
 
-void __exit __tah_fini(struct ocp_device *ocpdev)
+void __tah_fini(struct ocp_device *ocpdev)
 {
 	struct tah_regs *p = ocp_get_drvdata(ocpdev);
 	BUG_ON(!p);

trunk/drivers/net/ibm_emac/ibm_emac_tah.h

@@ -55,7 +55,7 @@ struct tah_regs {
 #ifdef CONFIG_IBM_EMAC_TAH
 int tah_attach(void *emac) __init;
 
-void __tah_fini(struct ocp_device *ocpdev) __exit;
+void __tah_fini(struct ocp_device *ocpdev);
 static inline void tah_fini(struct ocp_device *ocpdev)
 {
 	if (ocpdev)

trunk/drivers/net/ibm_emac/ibm_emac_zmii.c

@@ -215,7 +215,7 @@ void __zmii_set_speed(struct ocp_device *ocpdev, int input, int speed)
 	out_be32(&dev->base->ssr, ssr);
 }
 
-void __exit __zmii_fini(struct ocp_device *ocpdev, int input)
+void __zmii_fini(struct ocp_device *ocpdev, int input)
 {
 	struct ibm_ocp_zmii *dev = ocp_get_drvdata(ocpdev);
 	BUG_ON(!dev || dev->users == 0);

trunk/drivers/net/ibm_emac/ibm_emac_zmii.h

@@ -40,7 +40,7 @@ struct ibm_ocp_zmii {
 #ifdef CONFIG_IBM_EMAC_ZMII
 int zmii_attach(void *emac) __init;
 
-void __zmii_fini(struct ocp_device *ocpdev, int input) __exit;
+void __zmii_fini(struct ocp_device *ocpdev, int input);
 static inline void zmii_fini(struct ocp_device *ocpdev, int input)
 {
 	if (ocpdev)

trunk/drivers/net/ixgb/ixgb.h

@@ -193,8 +193,6 @@ struct ixgb_adapter {
 	u16 msg_enable;
 	struct ixgb_hw_stats stats;
 	uint32_t alloc_rx_buff_failed;
-#ifdef CONFIG_PCI_MSI
 	boolean_t have_msi;
-#endif
 };
 #endif /* _IXGB_H_ */

trunk/drivers/net/ixgb/ixgb_main.c

@@ -227,7 +227,7 @@ int
 ixgb_up(struct ixgb_adapter *adapter)
 {
 	struct net_device *netdev = adapter->netdev;
-	int err;
+	int err, irq_flags = IRQF_SHARED;
 	int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
 	struct ixgb_hw *hw = &adapter->hw;
 
@@ -246,26 +246,21 @@ ixgb_up(struct ixgb_adapter *adapter)
 	/* disable interrupts and get the hardware into a known state */
 	IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
 
-#ifdef CONFIG_PCI_MSI
-	{
-	boolean_t pcix = (IXGB_READ_REG(&adapter->hw, STATUS) & 
-						  IXGB_STATUS_PCIX_MODE) ? TRUE : FALSE;
-	adapter->have_msi = TRUE;
-
-	if (!pcix)
-	   adapter->have_msi = FALSE;
-	else if((err = pci_enable_msi(adapter->pdev))) {
-		DPRINTK(PROBE, ERR,
-		 "Unable to allocate MSI interrupt Error: %d\n", err);
-		adapter->have_msi = FALSE;
+	/* only enable MSI if bus is in PCI-X mode */
+	if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
+		err = pci_enable_msi(adapter->pdev);
+		if (!err) {
+			adapter->have_msi = 1;
+			irq_flags = 0;
+		}
 		/* proceed to try to request regular interrupt */
 	}
-	}
 
-#endif
-	if((err = request_irq(adapter->pdev->irq, &ixgb_intr,
-				  IRQF_SHARED | IRQF_SAMPLE_RANDOM,
-			          netdev->name, netdev))) {
+	err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
+	                  netdev->name, netdev);
+	if (err) {
+		if (adapter->have_msi)
+			pci_disable_msi(adapter->pdev);
 		DPRINTK(PROBE, ERR,
 		 "Unable to allocate interrupt Error: %d\n", err);
 		return err;
@@ -307,11 +302,10 @@ ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog)
 
 	ixgb_irq_disable(adapter);
 	free_irq(adapter->pdev->irq, netdev);
-#ifdef CONFIG_PCI_MSI
-	if(adapter->have_msi == TRUE)
+
+	if (adapter->have_msi)
 		pci_disable_msi(adapter->pdev);
 
-#endif
 	if(kill_watchdog)
 		del_timer_sync(&adapter->watchdog_timer);
 #ifdef CONFIG_IXGB_NAPI