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author | Stephen Hemminger <shemminger@linux-foundation.org> | 2007-04-04 11:10:43 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-04-13 13:47:01 -0700 |
commit | 0fb7a0aa32466404d7b31488df9ad0fcbe738b3c (patch) | |
tree | 210729d65528eb53281166fbae843d97c4361c66 | |
parent | a63b596ec4b04fdf46bdc2d9c7410924ed4d9724 (diff) | |
download | lwn-0fb7a0aa32466404d7b31488df9ad0fcbe738b3c.tar.gz lwn-0fb7a0aa32466404d7b31488df9ad0fcbe738b3c.zip |
sky2: reliable recovery
This adds working recovery from transmit timeouts. Previous code
didn't do enough to truly reset chip.
It is a backport of the 2.6.21 code.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r-- | drivers/net/sky2.c | 81 | ||||
-rw-r--r-- | drivers/net/sky2.h | 1 |
2 files changed, 56 insertions, 26 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index f44c39775387..1a4bcb10e2b6 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -1802,38 +1802,22 @@ static void sky2_tx_timeout(struct net_device *dev) { struct sky2_port *sky2 = netdev_priv(dev); struct sky2_hw *hw = sky2->hw; - unsigned txq = txqaddr[sky2->port]; - u16 report, done; + unsigned port = sky2->port; if (netif_msg_timer(sky2)) printk(KERN_ERR PFX "%s: tx timeout\n", dev->name); - report = sky2_read16(hw, sky2->port == 0 ? STAT_TXA1_RIDX : STAT_TXA2_RIDX); - done = sky2_read16(hw, Q_ADDR(txq, Q_DONE)); - - printk(KERN_DEBUG PFX "%s: transmit ring %u .. %u report=%u done=%u\n", - dev->name, - sky2->tx_cons, sky2->tx_prod, report, done); - - if (report != done) { - printk(KERN_INFO PFX "status burst pending (irq moderation?)\n"); + /* Get information for bug report :-) */ + printk(KERN_INFO PFX "%s: transmit ring %u .. %u report=%u done=%u\n", + dev->name, sky2->tx_cons, sky2->tx_prod, + sky2_read16(hw, port == 0 ? STAT_TXA1_RIDX : STAT_TXA2_RIDX), + sky2_read16(hw, Q_ADDR(txqaddr[sky2->port], Q_DONE))); - sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP); - sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START); - } else if (report != sky2->tx_cons) { - printk(KERN_INFO PFX "status report lost?\n"); - sky2_tx_complete(sky2, report); - } else { - printk(KERN_INFO PFX "hardware hung? flushing\n"); + printk(KERN_INFO PFX "gmac control %#x status %#x\n", + gma_read16(hw, port, GM_GP_CTRL), gma_read16(hw, port, GM_GP_STAT)); - sky2_write32(hw, Q_ADDR(txq, Q_CSR), BMU_STOP); - sky2_write32(hw, Y2_QADDR(txq, PREF_UNIT_CTRL), PREF_UNIT_RST_SET); - - sky2_tx_complete(sky2, sky2->tx_prod); - - sky2_qset(hw, txq); - sky2_prefetch_init(hw, txq, sky2->tx_le_map, TX_RING_SIZE - 1); - } + /* can't restart safely under softirq */ + schedule_work(&hw->restart_work); } static int sky2_change_mtu(struct net_device *dev, int new_mtu) @@ -2565,6 +2549,49 @@ static int sky2_reset(struct sky2_hw *hw) return 0; } +static void sky2_restart(struct work_struct *work) +{ + struct sky2_hw *hw = container_of(work, struct sky2_hw, restart_work); + struct net_device *dev; + int i, err; + + dev_dbg(&hw->pdev->dev, "restarting\n"); + + del_timer_sync(&hw->idle_timer); + + rtnl_lock(); + sky2_write32(hw, B0_IMSK, 0); + sky2_read32(hw, B0_IMSK); + + netif_poll_disable(hw->dev[0]); + + for (i = 0; i < hw->ports; i++) { + dev = hw->dev[i]; + if (netif_running(dev)) + sky2_down(dev); + } + + sky2_reset(hw); + sky2_write32(hw, B0_IMSK, Y2_IS_BASE); + netif_poll_enable(hw->dev[0]); + + for (i = 0; i < hw->ports; i++) { + dev = hw->dev[i]; + if (netif_running(dev)) { + err = sky2_up(dev); + if (err) { + printk(KERN_INFO PFX "%s: could not restart %d\n", + dev->name, err); + dev_close(dev); + } + } + } + + sky2_idle_start(hw); + + rtnl_unlock(); +} + static u32 sky2_supported_modes(const struct sky2_hw *hw) { if (sky2_is_copper(hw)) { @@ -3508,6 +3535,8 @@ static int __devinit sky2_probe(struct pci_dev *pdev, } setup_timer(&hw->idle_timer, sky2_idle, (unsigned long) hw); + INIT_WORK(&hw->restart_work, sky2_restart); + sky2_idle_start(hw); pci_set_drvdata(pdev, hw); diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h index 148aab2c4829..5193714b1d29 100644 --- a/drivers/net/sky2.h +++ b/drivers/net/sky2.h @@ -1898,6 +1898,7 @@ struct sky2_hw { dma_addr_t st_dma; struct timer_list idle_timer; + struct work_struct restart_work; int msi; wait_queue_head_t msi_wait; }; |