From bbe832c09233738c100145fd535b6b8fc97640f6 Mon Sep 17 00:00:00 2001 From: Michael Chan Date: Fri, 24 Jun 2005 20:20:04 -0700 Subject: [PATCH] [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 Signed-off-by: David S. Miller --- drivers/net/tg3.c | 34 ++++++++++++++++++++-------------- 1 file changed, 20 insertions(+), 14 deletions(-) diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 8b8aa2ad578b..04e747aa1a86 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -430,12 +430,14 @@ static inline void tg3_cond_int(struct tg3 *tp) static void tg3_enable_ints(struct tg3 *tp) { + tp->irq_sync = 0; + wmb(); + tw32(TG3PCI_MISC_HOST_CTRL, (tp->misc_host_ctrl & ~MISC_HOST_CTRL_MASK_PCI_INT)); tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, (tp->last_tag << 24)); tr32(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW); - tp->irq_sync = 0; tg3_cond_int(tp); } @@ -484,6 +486,7 @@ static void tg3_restart_ints(struct tg3 *tp) static inline void tg3_netif_stop(struct tg3 *tp) { + tp->dev->trans_start = jiffies; /* prevent tx timeout */ netif_poll_disable(tp->dev); netif_tx_disable(tp->dev); } @@ -5724,9 +5727,6 @@ static int tg3_reset_hw(struct tg3 *tp) tg3_write_sig_post_reset(tp, RESET_KIND_INIT); - if (tp->tg3_flags & TG3_FLAG_INIT_COMPLETE) - tg3_enable_ints(tp); - return 0; } @@ -7076,16 +7076,19 @@ static void tg3_get_ringparam(struct net_device *dev, struct ethtool_ringparam * static int tg3_set_ringparam(struct net_device *dev, struct ethtool_ringparam *ering) { struct tg3 *tp = netdev_priv(dev); + int irq_sync = 0; if ((ering->rx_pending > TG3_RX_RING_SIZE - 1) || (ering->rx_jumbo_pending > TG3_RX_JUMBO_RING_SIZE - 1) || (ering->tx_pending > TG3_TX_RING_SIZE - 1)) return -EINVAL; - if (netif_running(dev)) + if (netif_running(dev)) { tg3_netif_stop(tp); + irq_sync = 1; + } - tg3_full_lock(tp, 0); + tg3_full_lock(tp, irq_sync); tp->rx_pending = ering->rx_pending; @@ -7118,11 +7121,14 @@ static void tg3_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam static int tg3_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam *epause) { struct tg3 *tp = netdev_priv(dev); + int irq_sync = 0; - if (netif_running(dev)) + if (netif_running(dev)) { tg3_netif_stop(tp); + irq_sync = 1; + } - tg3_full_lock(tp, 1); + tg3_full_lock(tp, irq_sync); if (epause->autoneg) tp->tg3_flags |= TG3_FLAG_PAUSE_AUTONEG; @@ -7578,8 +7584,6 @@ static int tg3_test_loopback(struct tg3 *tp) tg3_abort_hw(tp, 1); - /* Clearing this flag to keep interrupts disabled */ - tp->tg3_flags &= ~TG3_FLAG_INIT_COMPLETE; tg3_reset_hw(tp); mac_mode = (tp->mac_mode & ~MAC_MODE_PORT_MODE_MASK) | @@ -7688,10 +7692,14 @@ static void tg3_self_test(struct net_device *dev, struct ethtool_test *etest, data[1] = 1; } if (etest->flags & ETH_TEST_FL_OFFLINE) { - if (netif_running(dev)) + int irq_sync = 0; + + if (netif_running(dev)) { tg3_netif_stop(tp); + irq_sync = 1; + } - tg3_full_lock(tp, 1); + tg3_full_lock(tp, irq_sync); tg3_halt(tp, RESET_KIND_SUSPEND, 1); tg3_nvram_lock(tp); @@ -10184,8 +10192,6 @@ static int tg3_resume(struct pci_dev *pdev) tp->timer.expires = jiffies + tp->timer_offset; add_timer(&tp->timer); - tg3_enable_ints(tp); - tg3_netif_start(tp); tg3_full_unlock(tp); -- 2.20.1