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| author | Lennert Buytenhek <buytenh@wantstofly.org> | 2008-09-19 05:04:57 +0200 |
|---|---|---|
| committer | Lennert Buytenhek <buytenh@marvell.com> | 2008-09-19 05:13:54 +0200 |
| commit | 4ff3495a51c7226376d8013c5742d1d5e54876a7 (patch) | |
| tree | 51b85dd78a89de6f57e9cc96e0de05347ab0eb41 | |
| parent | 4df89bd5a5fc33860f15f5f001a78f2b3f150725 (diff) | |
| download | kernel_samsung_smdk4412-4ff3495a51c7226376d8013c5742d1d5e54876a7.zip kernel_samsung_smdk4412-4ff3495a51c7226376d8013c5742d1d5e54876a7.tar.gz kernel_samsung_smdk4412-4ff3495a51c7226376d8013c5742d1d5e54876a7.tar.bz2 | |
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>
| -rw-r--r-- | drivers/net/mv643xx_eth.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index 9522c44..d0ecc44 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -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); |