[PATCH] ath10k: add dynamic vlan support

Kalle Valo kvalo at codeaurora.org
Tue Apr 24 01:09:13 PDT 2018

Manikanta Pubbisetty <mpubbise at codeaurora.org> writes:

> Mutlicast/broadcast traffic destined for a particular vlan group will
> always be encrypted in software. To enable dynamic VLANs, it requires
> driver support for sending software encrypted packets.
> In ath10k, sending sw encrypted frames is allowed only when we insmod
> the driver with cryptmode param set to 1, this configuration disables
> hardware crypto and enables RAW mode implicitly. Since, enabling raw
> mode has performance impact, this cannot be considered as an ideal
> solution for supporting VLANs in the driver.
> As an alternative take, in this approach, cryptographic keys for
> unicast traffic(per peer PTKs) and keys for non-vlan group traffic
> will be configured in hardware, allowing hardware encryption for unicast
> and non-vlan group traffic. Only vlan group traffic will be encrypted in
> software and pushed to the target with encap mode set to RAW in the TX
> descriptors.
> Not all firmwares can support this type of key configuration(having few
> keys installed in hardware and few only in software); for this purpose a
> new WMI service flag "WMI_SERVICE_PER_PACKET_SW_ENCRYPT" is introduced to
> advertise this support.
> Also, adding the logic required to send sw encrypted frames in raw mode.
> Tested this change on QCA9984(firmware version 10.4-3.5.3-00057).
> Signed-off-by: Manikanta Pubbisetty <mpubbise at codeaurora.org>

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Kalle Valo

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