Re: [RFC] mac80211_hwsim: notify user-space about channel change.

[Ben Greear <greearb@candelatech.com>]

On 04/14/2015 01:13 AM, Johannes Berg wrote:
> On Tue, 2015-03-31 at 08:56 -0700, Ben Greear wrote:
>
>>> Well, depends. Our driver just asks the firmware to do the scan, and it
>>> will do all the scheduling by itself, i.e. it'll go through the channels
>>> at convenient times etc.
>>
>> I do not want to offload scanning in user-space, which is the equivalent
>> of what your driver is doing as far as the kernel is concerned?  If someone wants
>> to do that in the future, then sure, they can implement such a thing.
>
> Well, the question isn't really that offloading, the question is what
> happens with the hw-scan logic in hwsim? Though I guess now that I think
> about it, that wouldn't show up in userspace at all with your changes.

I think for HW scan and related matters, you treat user-space like a firmware
target, so you send it a message, and then get some response or action, similar
to how you would request ath10k or some USB dongle NIC to do things for you.

My own interest in hwsim user-space is to make it act more like ath9k
than a firmware target driver, but I don't think my changes preclude doing
target based emulation in the future.

Thanks,
Ben

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