On 07/17/2018 08:47 AM, Andrew Lunn wrote:
> On Tue, Jul 17, 2018 at 08:36:37AM -0700, Florian Fainelli wrote:
>> Hi all,
>>
>> This patch series adds support for allowing Wake-on-LAN to wake-up the
>> system using configurable filters. This is particular useful in the context
>> of Android where wake on MDNS is a requirement.
>>
>> We support this by using the bcm_sf2 Compact Field Processor (CFP) which
>> supports matching packets and tagging them with an unique identifier
>> (Classification ID) that is added in each packet being matched through the
>> use
>> of Broadcom tags. The SYSTEMPORT MAC attached to that switch is then used to
>> match that unique identifier and trigger a system wake-up event.
>>
>> Last patch is the ethtool modifications to support that feature.
>>
>> Example:
>>
>> ethtool --config-nfc gphy flow-type udp4 src-ip 192.168.1.1 dst-ip
>> 192.168.1.32 \
>> src-port 1234 dst-port 5678 action 64
>> Added rule with ID 1
>
> Hi Florian
>
> What is action 64?
There are 8 egress queues per port, and we want to target port 8 here.
Number of queues is discoverable through sysfs by scanning
/sys/class/net/gphy/queues/tx-*. CPU port number is fixed at 8, we don't
have a mechanism AFAICT to expose that to users, because, of course, we
don't expose the CPU port with DSA.
>
>> ethtool -s gphy wol f filters 0x2
>
> What does this 0x2 represent?
0x2 = bit 1 is set, which corresponds to the filter ID that was returned
from the previous ethtool::rxnfc command invocation. If ethtool
--config-nfc returned 3, then we would have used filters 0x8, etc.
--
Florian
