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Packet aggregation in iwlwifi drivers

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Hello,
- I have a short question about packet aggregation in iwlwifi drivers which
support 802.11n:
Is packet aggregation in these drivers performed by the firmware ?

I noticed that the ampdu_action() function is implemented by
iwl_mac_ampdu_action()
in these drivers; but as far as I can find, only the operations of
start/stop tx and rx aggregation
are implemented in the driver, so I guess that the aggregation of MPDU packets
(concatenating them into a single block, sending BAR - block
acknowledge request,
sending the block containing aggregated MPDUs, and so on) are
implemented in firmware. Is it so ?


Regards,
Kevin
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