cxgbe netmap promiscuous mode?

[Joe Jones]

uname -a
FreeBSD goose2 11.0-RELEASE-p9 FreeBSD 11.0-RELEASE-p9 #0: Tue Apr 11 
08:48:40 UTC 2017 
root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64

The card is a 'T520-SO Unified Wire Ethernet Controller'

I ran the following with dtrace running in a separate window

ifconfig cxl1 promisc up ( only see broadcast)
ifconfig cxl1 -promisc
ifconfig cxl1 promisc (now I see traffic)

dtrace output was

[root at goose2 /usr/home/joe]# dtrace -n 'fbt::t4_set_rxmode:entry 
{trace(arg4)}'
dtrace: description 'fbt::t4_set_rxmode:entry ' matched 1 probe
CPU     ID                    FUNCTION:NAME
   4  61078              t4_set_rxmode:entry                 1
   7  61078              t4_set_rxmode:entry                 0
   5  61078              t4_set_rxmode:entry                 1


On 19/04/17 01:18, Navdeep Parhar wrote:
> On Mon, Apr 17, 2017 at 11:00:38AM +0100, Joe Jones wrote:
>> Hi Navdeep
>>
>> running "ifconfig up" and then "ifconfig promisc" works. Running "ifconfig
>> promisc" and then "ifconfig up" does not work. Running "ifconfig up promisc"
>> together does work. Running "ifconfig promisc up" does not work.
> What version of FreeBSD is this?  I couldn't reproduce this on head with
> a T6 card.  Can you please run this in parallel with your ifconfig
> commands, note what dtrace logs in response to what command(s), and send
> the output to me?
>
> # dtrace -n 'fbt::t4_set_rxmode:entry {trace(arg4)}'
>
>> The combination that does not work leaves the interface in a state where it
>> reports it's self as being in promiscuous mode.
> In my experiments the interface did function in promiscuous mode whether
> I did "ifconfig cc0 promisc up" or "ifconfig cc0 up promisc".
>
> Regards,
> Navdeep