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List:       freebsd-net
Subject:    Re: em driver, 82574L chip, and possibly ASPM
From:       Mike Tancsa <mike () sentex ! net>
Date:       2011-01-28 16:10:28
Message-ID: 4D42EA74.4090807 () sentex ! net
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On 1/23/2011 10:21 AM, Mike Tancsa wrote:
> On 1/21/2011 4:21 AM, Jan Koum wrote:
> One other thing I noticed is that when the nic is in its hung state, the
> WOL option is gone ?
> 
> e.g
> 
> em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4>
>         ether 00:15:17:ed:68:a4
> 
> vs
> 
> 
> em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
> 
> options=219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC>
>         ether 00:15:17:ed:68:a4


Another hang last night :(

Whats really strange is that the WOL_MAGIC and TSO4 got turned back on
somehow ? I had explicitly turned it off, but when the NIC was in its
bad state

em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=2198<VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC>

... its back on along with TSO?  Not sure if its coincidence or a side
effect or what.  For now, I have had to re-purpose this nic to something
else.

debug info shows

Jan 28 00:25:10 backup3 kernel: Interface is RUNNING and INACTIVE
Jan 28 00:25:10 backup3 kernel: em1: hw tdh = 625, hw tdt = 625
Jan 28 00:25:10 backup3 kernel: em1: hw rdh = 903, hw rdt = 903
Jan 28 00:25:10 backup3 kernel: em1: Tx Queue Status = 0
Jan 28 00:25:10 backup3 kernel: em1: TX descriptors avail = 1024
Jan 28 00:25:10 backup3 kernel: em1: Tx Descriptors avail failure = 0
Jan 28 00:25:10 backup3 kernel: em1: RX discarded packets = 0
Jan 28 00:25:10 backup3 kernel: em1: RX Next to Check = 903
Jan 28 00:25:10 backup3 kernel: em1: RX Next to Refresh = 904
Jan 28 00:25:27 backup3 kernel: em1: link state changed to DOWN
Jan 28 00:25:30 backup3 kernel: em1: link state changed to UP


	---Mike
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