[TG3]: Refinements to new locking strategy.
1. Move tp->irq_sync = 0 to before the interrupt mailbox IO in tg3_enable_ints() so that the interrupt handler will always see irq_sync == 0 when interrupts are enabled. 2. Remove the tg3_enable_ints() call in tg3_reset_hw(). Interrupts are always enabled explicitly or through tg3_netif_start(). This is to prevent interrupts being enabled while poll is disabled. 3. Update trans_start with jiffies in tg3_netif_stop() to prevent false NETDEV WATCHDOG. 4. Pass in the proper irq_sync parameter to tg3_full_lock() depending on netif_running() in some of the ethtool set calls. Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -430,12 +430,14 @@ static inline void tg3_cond_int(struct tg3 *tp)
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static void tg3_enable_ints(struct tg3 *tp)
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{
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tp->irq_sync = 0;
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wmb();
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tw32(TG3PCI_MISC_HOST_CTRL,
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(tp->misc_host_ctrl & ~MISC_HOST_CTRL_MASK_PCI_INT));
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tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW,
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(tp->last_tag << 24));
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tr32(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW);
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tp->irq_sync = 0;
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tg3_cond_int(tp);
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}
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@ -484,6 +486,7 @@ static void tg3_restart_ints(struct tg3 *tp)
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static inline void tg3_netif_stop(struct tg3 *tp)
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{
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tp->dev->trans_start = jiffies; /* prevent tx timeout */
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netif_poll_disable(tp->dev);
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netif_tx_disable(tp->dev);
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}
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@ -5724,9 +5727,6 @@ static int tg3_reset_hw(struct tg3 *tp)
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tg3_write_sig_post_reset(tp, RESET_KIND_INIT);
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if (tp->tg3_flags & TG3_FLAG_INIT_COMPLETE)
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tg3_enable_ints(tp);
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return 0;
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}
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@ -7076,16 +7076,19 @@ static void tg3_get_ringparam(struct net_device *dev, struct ethtool_ringparam *
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static int tg3_set_ringparam(struct net_device *dev, struct ethtool_ringparam *ering)
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{
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struct tg3 *tp = netdev_priv(dev);
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int irq_sync = 0;
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if ((ering->rx_pending > TG3_RX_RING_SIZE - 1) ||
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(ering->rx_jumbo_pending > TG3_RX_JUMBO_RING_SIZE - 1) ||
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(ering->tx_pending > TG3_TX_RING_SIZE - 1))
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return -EINVAL;
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if (netif_running(dev))
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if (netif_running(dev)) {
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tg3_netif_stop(tp);
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irq_sync = 1;
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}
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tg3_full_lock(tp, 0);
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tg3_full_lock(tp, irq_sync);
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tp->rx_pending = ering->rx_pending;
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@ -7118,11 +7121,14 @@ static void tg3_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam
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static int tg3_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam *epause)
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{
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struct tg3 *tp = netdev_priv(dev);
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int irq_sync = 0;
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if (netif_running(dev))
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if (netif_running(dev)) {
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tg3_netif_stop(tp);
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irq_sync = 1;
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}
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tg3_full_lock(tp, 1);
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tg3_full_lock(tp, irq_sync);
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if (epause->autoneg)
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tp->tg3_flags |= TG3_FLAG_PAUSE_AUTONEG;
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@ -7578,8 +7584,6 @@ static int tg3_test_loopback(struct tg3 *tp)
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tg3_abort_hw(tp, 1);
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/* Clearing this flag to keep interrupts disabled */
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tp->tg3_flags &= ~TG3_FLAG_INIT_COMPLETE;
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tg3_reset_hw(tp);
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mac_mode = (tp->mac_mode & ~MAC_MODE_PORT_MODE_MASK) |
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@ -7688,10 +7692,14 @@ static void tg3_self_test(struct net_device *dev, struct ethtool_test *etest,
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data[1] = 1;
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}
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if (etest->flags & ETH_TEST_FL_OFFLINE) {
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if (netif_running(dev))
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tg3_netif_stop(tp);
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int irq_sync = 0;
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tg3_full_lock(tp, 1);
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if (netif_running(dev)) {
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tg3_netif_stop(tp);
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irq_sync = 1;
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}
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tg3_full_lock(tp, irq_sync);
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tg3_halt(tp, RESET_KIND_SUSPEND, 1);
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tg3_nvram_lock(tp);
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@ -10184,8 +10192,6 @@ static int tg3_resume(struct pci_dev *pdev)
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tp->timer.expires = jiffies + tp->timer_offset;
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add_timer(&tp->timer);
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tg3_enable_ints(tp);
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tg3_netif_start(tp);
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tg3_full_unlock(tp);
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