Re: [PATCH v2 1/2] ath11k: handle RX fragments

[Kalle Valo <kvalo@codeaurora.org>]

Manikanta Pubbisetty <mpubbise@codeaurora.org> wrote:

> IPQ8074 HW has support to verify the PN of the received frames.
> For all frames except for fragmented ones, HW checks the PN and
> delivers them to the driver. For fragmented frames, driver is
> required to do a little more; it has to reassemble the fragments
> and then reinject them to the HW for verifying the PN. Currently,
> to keep the logic simple, PN verifcation is disabled in HW and is
> handled in mac80211 for all the frames (fragmented and unfragmented).
> 
> On the contrary, offloading PN Validation to the HW brings important
> benefits. It reduces CPU cycles spent on the host CPU for verifying
> the same; helps in enabling features which improve performance like
> mac80211 fast RX path, enabling multiple REO rings for parallel RX
> processing, 802.11 decapsulation offloading. All these features are
> dependent on PN offload which in turn is dependent on handling of
> the received fragments in the driver.
> 
> When TKIP security is used, additional handling is required while
> processing the fragments; since MIC is computed on an MSDU in TKIP,
> only the last fragment has the MIC info. In this case, driver has to
> compute the MIC after reassembly and compare it against the MIC
> present in the frame. For this, MICHAEL_MIC kernel crypto library
> APIs are used and the dependencies are appropriately set.
> 
> Signed-off-by: Manikanta Pubbisetty <mpubbise@codeaurora.org>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

2 patches applied to ath-next branch of ath.git, thanks.

243874c64c81 ath11k: handle RX fragments
1441b2f205a7 ath11k: enable PN offload

-- 
https://patchwork.kernel.org/patch/11436249/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches