Any tips on where per-packet antenna selection could be pushed?

[Ben Greear]

On 06/06/2016 11:48 AM, Zach Sherin wrote:
> Interesting. Could I ask if there's somewhere I should start digging?
> If it's not obvious I'm a driver/kernel newbie, but I'm happy to
> learn. Should I start by going through ath10k's documentation/code
> until I find the relevant bits?

Unfortunately, without firmware source, you have probably no chance
to do this.  And, you also probably have about no chance of getting
firmware source.

Thanks,
Ben

>
> Thanks,
> Zach
>
>
> On Mon, Jun 6, 2016 at 2:42 PM, Adrian Chadd <adrian.chadd at gmail.com> wrote:
>> I bet the ruckus mode shift stuff is in the ath10k hardware and is
>> configurable per TX descriptor.
>>
>> a
>>
>> On Jun 6, 2016 11:03 AM, "Ben Greear" <greearb at candelatech.com> wrote:
>>>
>>> On 06/06/2016 10:59 AM, Zach Sherin wrote:
>>>>
>>>> I was aiming to run this off a serial interface on the general board,
>>>> not on the ath10k NIC. I have a consumer QCA9880 PCI board in an
>>>> Archer C7 router. It would be awesome if I could steal a GPIO or
>>>> something from the atheros chip to output, but I was assuming I
>>>> couldn't. The main reason I was looking at the ath10k driver was to
>>>> get as close to when the packets are transmitted as possible, to leave
>>>> as little room for error in the switching as possible.
>>>>
>>>> However, it's  possible that I'm hoping for too much there. I'd be
>>>> interested to hear your thoughts on it. If I can't pull it off, I'll
>>>> move to an approach outside ath10k.
>>>
>>>
>>> The driver just sends pkts to the firmware, it is the firmware that
>>> knows when a pkt is to be transmitted, so I think you would have to have
>>> some
>>> hooks low in the firmware tx logic to do what you want.  And you would
>>> need some
>>> hardware output from the NIC.
>>>
>>> I am guessing it would require quite a bit of changes to the firmware,
>>> possibly very tricky/hacky ones, and hardware output on your NIC.
>>>
>>> Thanks,
>>> Ben
>>>
>>> --
>>> Ben Greear <greearb at candelatech.com>
>>> Candela Technologies Inc  http://www.candelatech.com
>>>
>>>
>>> _______________________________________________
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>


-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com