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mv643xx_eth: enforce frequent hardware statistics polling 

If we don't poll the hardware statistics counters at least once every
~34 seconds, overflow might occur without us noticing.  So, set up a
timer to poll the statistics counters at least once every 30 seconds.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
This commit is contained in:
Lennert Buytenhek 2008-09-19 05:04:57 +02:00 committed by Lennert Buytenhek
parent 4df89bd5a5
commit 4ff3495a51
1 changed files with 29 additions and 0 deletions
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29
drivers/net/mv643xx_eth.c
View File

@ -356,7 +356,10 @@ struct mv643xx_eth_private {
int phy_addr;
struct timer_list mib_counters_timer;
spinlock_t mib_counters_lock;
struct mib_counters mib_counters;
struct work_struct tx_timeout_task;
struct mii_if_info mii;
@ -1176,6 +1179,7 @@ static void mib_counters_update(struct mv643xx_eth_private *mp)
{
struct mib_counters *p = &mp->mib_counters;
spin_lock(&mp->mib_counters_lock);
p->good_octets_received += mib_read(mp, 0x00);
p->good_octets_received += (u64)mib_read(mp, 0x04) << 32;
p->bad_octets_received += mib_read(mp, 0x08);
@ -1208,6 +1212,16 @@ static void mib_counters_update(struct mv643xx_eth_private *mp)
p->bad_crc_event += mib_read(mp, 0x74);
p->collision += mib_read(mp, 0x78);
p->late_collision += mib_read(mp, 0x7c);
spin_unlock(&mp->mib_counters_lock);
mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
}
static void mib_counters_timer_wrapper(unsigned long _mp)
{
struct mv643xx_eth_private *mp = (void *)_mp;
mib_counters_update(mp);
}
@ -2148,6 +2162,8 @@ static int mv643xx_eth_stop(struct net_device *dev)
wrl(mp, INT_MASK(mp->port_num), 0x00000000);
rdl(mp, INT_MASK(mp->port_num));
del_timer_sync(&mp->mib_counters_timer);
napi_disable(&mp->napi);
del_timer_sync(&mp->rx_oom);
@ -2625,6 +2641,19 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
}
init_pscr(mp, pd->speed, pd->duplex);
mib_counters_clear(mp);
init_timer(&mp->mib_counters_timer);
mp->mib_counters_timer.data = (unsigned long)mp;
mp->mib_counters_timer.function = mib_counters_timer_wrapper;
mp->mib_counters_timer.expires = jiffies + 30 * HZ;
add_timer(&mp->mib_counters_timer);
spin_lock_init(&mp->mib_counters_lock);
INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 128);
init_timer(&mp->rx_oom);