[PATCH v3] ath10k: add 'cryptmode' param to support raw tx injection and software crypto

Liu CF/TW cfliu.tw at gmail.com
Thu Jun 11 11:43:55 PDT 2015

On Thu, Jun 11, 2015 at 6:59 AM, Kalle Valo <kvalo at qca.qualcomm.com> wrote:
> Liu CF/TW <cfliu.tw at gmail.com> writes:
>> This change supports hardware crypto engine bypass by enabling raw
>> Rx/Tx encap mode. This enables use cases such as software crypto and raw
>> tx injection. This change introduces a new module param 'cryptmode'.
>> cryptmode:
>>   0: Use hardware crypto engine globally with native Wi-Fi mode TX/RX
>>      encapsulation to the firmware. This is the default mode.
>>   1: Use sofware crypto engine globally with raw mode TX/RX encapsulation
>>      to the firmware.
> These two values are ok.
>>   2: Supports both hardware and software crypto with raw mode TX/RX
>>      encapsulation to the firmware. By default hardware crypto engine is
>>      used. To use software crypto in this mode, set the per ath10k_vif
>>      'nohwcrypt' flag value to True.*
>>      *) The patch for setting vif specific 'nohwcrypt' flag when
>>         cryptmode=2 would be a separate patch to mac80211.
> But this the problematic one. I cannot apply something to ath10k until
> Johannes applies the mac80211 part. Didn't I mention this already
> earlier? At least I was supposed to do that.

Yes I already removed those mac80211 dependent changes in v3. So this
patch doesn't really depend on any mac80211 change.

> And most importantly does Johannes even agree with the approach? IIRC he
> was pretty reluctant about configuring the crypto mode via nl80211.
> I suggest splitting the patch into two: patch 1 adding support for
> cryptmode values 0 and 1, patch 2 adding support for cryptmode 2. That
> way we can commit patch 1 early and see what we can do with patch 2.

Thanks. Will do in v4.
Removing cryptmode=2 is just a enum change. No additional changes in
the business logic required.

After your review of v1, I have implemented knobs in both mac80211's
debugfs and nl80211. I will send an RFC to mac80211 ML to see which
one they prefer.

> --
> Kalle Valo

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