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myri10ge: Use the pause counter to avoid a needless device reset

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Use the pause counter to avoid a needless device reset, and
print a message telling the admin that our link partner is
flow controlling us down to 0 pkts/sec.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Brice Goglin 2007-08-09 09:02:14 +02:00 committed by Jeff Garzik
parent b47157f004
commit 626fda9488
1 changed files with 18 additions and 7 deletions
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25
drivers/net/myri10ge/myri10ge.c
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@ -191,6 +191,7 @@ struct myri10ge_priv {
struct timer_list watchdog_timer;
int watchdog_tx_done;
int watchdog_tx_req;
int watchdog_pause;
int watchdog_resets;
int tx_linearized;
int pause;
@ -2800,6 +2801,7 @@ static void myri10ge_watchdog(struct work_struct *work)
static void myri10ge_watchdog_timer(unsigned long arg)
{
struct myri10ge_priv *mgp;
u32 rx_pause_cnt;
mgp = (struct myri10ge_priv *)arg;
@ -2816,19 +2818,28 @@ static void myri10ge_watchdog_timer(unsigned long arg)
myri10ge_fill_thresh)
mgp->rx_big.watchdog_needed = 0;
}
rx_pause_cnt = ntohl(mgp->fw_stats->dropped_pause);
if (mgp->tx.req != mgp->tx.done &&
mgp->tx.done == mgp->watchdog_tx_done &&
mgp->watchdog_tx_req != mgp->watchdog_tx_done)
mgp->watchdog_tx_req != mgp->watchdog_tx_done) {
/* nic seems like it might be stuck.. */
schedule_work(&mgp->watchdog_work);
else
/* rearm timer */
mod_timer(&mgp->watchdog_timer,
jiffies + myri10ge_watchdog_timeout * HZ);
if (rx_pause_cnt != mgp->watchdog_pause) {
if (net_ratelimit())
printk(KERN_WARNING "myri10ge %s:"
"TX paused, check link partner\n",
mgp->dev->name);
} else {
schedule_work(&mgp->watchdog_work);
return;
}
}
/* rearm timer */
mod_timer(&mgp->watchdog_timer,
jiffies + myri10ge_watchdog_timeout * HZ);
mgp->watchdog_tx_done = mgp->tx.done;
mgp->watchdog_tx_req = mgp->tx.req;
mgp->watchdog_pause = rx_pause_cnt;
}
static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)