1. 30 Sep, 2011 4 commits
    • Johannes Berg's avatar
      mac80211: allow releasing driver-buffered frames · 4049e09a
      Johannes Berg authored
      If there are frames for a station buffered in
      the driver, mac80211 announces those in the TIM
      IE but there's no way to release them. Add new
      API to release such frames and use it when the
      station polls for a frame.
      
      Since the API will soon also be used for uAPSD
      it is easily extensible.
      
      Note that before this change drivers announcing
      driver-buffered frames in the TIM bit actually
      will respond to a PS-Poll with a potentially
      lower priority frame (if there are any frames
      buffered in mac80211), after this patch a driver
      that hasn't been changed will no longer respond
      at all. This only affects ath9k, which will need
      to be fixed to implement the new API.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      4049e09a
    • Johannes Berg's avatar
      mac80211: split PS buffers into ACs · 948d887d
      Johannes Berg authored
      For uAPSD support we'll need to have per-AC PS
      buffers. As this is a major undertaking, split
      the buffers before really adding support for
      uAPSD. This already makes some reference to the
      uapsd_queues variable, but for now that will
      never be non-zero.
      
      Since book-keeping is complicated, also change
      the logic for keeping a maximum of frames only
      and allow 64 frames per AC (up from 128 for a
      station).
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      948d887d
    • Johannes Berg's avatar
      mac80211: let drivers inform it about per TID buffered frames · 042ec453
      Johannes Berg authored
      For uAPSD implementation, it is necessary to know on
      which ACs frames are buffered. mac80211 obviously
      knows about the frames it has buffered itself, but
      with aggregation many drivers buffer frames. Thus,
      mac80211 needs to be informed about this.
      
      For now, since we don't have APSD in any form, this
      will unconditionally set the TIM bit for the station
      but later with uAPSD only some ACs might cause the
      TIM bit to be set.
      
      ath9k is the only driver using this API and I only
      modify it in the most basic way, it won't be able
      to implement uAPSD with this yet. But it can't do
      that anyway since there's no way to selectively
      release frames to the peer yet.
      
      Since drivers will buffer frames per TID, let them
      inform mac80211 on a per TID basis, mac80211 will
      then sort out the AC mapping itself.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      042ec453
    • Arik Nemtsov's avatar
      mac80211: standardize adding supported rates IEs · 768db343
      Arik Nemtsov authored
      Relocate the mesh implementation of adding the (extended) supported
      rates IE to util.c, anticipating its use by other parts of mac80211.
      Signed-off-by: default avatarArik Nemtsov <arik@wizery.com>
      Cc: Kalyan C Gaddam <chakkal@iit.edu>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      768db343
  2. 27 Sep, 2011 2 commits
  3. 20 Sep, 2011 1 commit
  4. 16 Sep, 2011 1 commit
  5. 14 Sep, 2011 2 commits
  6. 13 Sep, 2011 1 commit
  7. 26 Aug, 2011 1 commit
  8. 08 Aug, 2011 2 commits
  9. 20 Jul, 2011 1 commit
  10. 15 Jul, 2011 2 commits
  11. 13 Jul, 2011 1 commit
    • Johannes Berg's avatar
      mac80211: allow driver to disconnect after resume · 95acac61
      Johannes Berg authored
      In WoWLAN, devices may use crypto keys for TX/RX
      and could also implement GTK rekeying. If the
      driver isn't able to retrieve replay counters and
      similar information from the device upon resume,
      or if the device isn't responsive due to platform
      issues, it isn't safe to keep the connection up
      as GTK rekey messages from during the sleep time
      could be replayed against it.
      
      The only protection against that is disconnecting
      from the AP. Modifying mac80211 to do that while
      it is resuming would be very complex and invasive
      in the case that the driver requires a reconfig,
      so do it after it has resumed completely. In that
      case, however, packets might be replayed since it
      can then only happen after TX/RX are up again, so
      mark keys for interfaces that need to disconnect
      as "tainted" and drop all packets that are sent
      or received with those keys.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      95acac61
  12. 11 Jul, 2011 1 commit
  13. 08 Jul, 2011 3 commits
    • Johannes Berg's avatar
      mac80211: allow driver to generate P1K for IV32 · 42d98795
      Johannes Berg authored
      In order to support pre-populating the P1K cache in
      iwlwifi hardware for WoWLAN, we need to calculate
      the P1K for the current IV32. Allow drivers to get
      the P1K for any given IV32 instead of for a given
      packet, but keep the packet-based version around as
      an inline.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      42d98795
    • Johannes Berg's avatar
      mac80211: allow drivers to access key sequence counter · 3ea542d3
      Johannes Berg authored
      In order to implement GTK rekeying, the device needs
      to be able to encrypt frames with the right PN/IV and
      check the PN/IV in RX frames. To be able to tell it
      about all those counters, we need to be able to get
      them from mac80211, this adds the required API.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      3ea542d3
    • Johannes Berg's avatar
      mac80211: fix TKIP races, make API easier to use · 523b02ea
      Johannes Berg authored
      Our current TKIP code races against itself on TX
      since we can process multiple packets at the same
      time on different ACs, but they all share the TX
      context for TKIP. This can lead to bad IVs etc.
      
      Also, the crypto offload helper code just obtains
      the P1K/P2K from the cache, and can update it as
      well, but there's no guarantee that packets are
      really processed in order.
      
      To fix these issues, first introduce a spinlock
      that will protect the IV16/IV32 values in the TX
      context. This first step makes sure that we don't
      assign the same IV multiple times or get confused
      in other ways.
      
      Secondly, change the way the P1K cache works. I
      add a field "p1k_iv32" that stores the value of
      the IV32 when the P1K was last recomputed, and
      if different from the last time, then a new P1K
      is recomputed. This can cause the P1K computation
      to flip back and forth if packets are processed
      out of order. All this also happens under the new
      spinlock.
      
      Finally, because there are argument differences,
      split up the ieee80211_get_tkip_key() API into
      ieee80211_get_tkip_p1k() and ieee80211_get_tkip_p2k()
      and give them the correct arguments.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      523b02ea
  14. 06 Jul, 2011 2 commits
  15. 05 Jul, 2011 1 commit
  16. 29 Jun, 2011 1 commit
  17. 17 Jun, 2011 1 commit
  18. 10 Jun, 2011 1 commit
  19. 07 Jun, 2011 1 commit
    • Shahar Levi's avatar
      mac80211: Stop BA session event from device · f41ccd71
      Shahar Levi authored
      Some devices support BT/WLAN co-existence algorigthms.
      In order not to harm the system performance and user experience, the device
      requests not to allow any RX BA session and tear down existing RX BA sessions
      based on system constraints such as periodic BT activity that needs to limit
      WLAN activity (eg.SCO or A2DP).
      In such cases, the intention is to limit the duration of the RX PPDU and
      therefore prevent the peer device to use A-MPDU aggregation.
      
      Adding ieee80211_stop_rx_ba_session() callback
      that can be used by the driver to stop existing BA sessions.
      Signed-off-by: default avatarShahar Levi <shahar_levi@ti.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      f41ccd71
  20. 01 Jun, 2011 1 commit
  21. 24 May, 2011 1 commit
  22. 22 May, 2011 1 commit
  23. 11 May, 2011 1 commit
  24. 05 May, 2011 1 commit
  25. 28 Apr, 2011 2 commits
  26. 19 Apr, 2011 1 commit
  27. 12 Apr, 2011 1 commit
    • Vivek Natarajan's avatar
      mac80211: Check for queued frames before entering power save. · e8306f98
      Vivek Natarajan authored
      In a highly noisy environment, the tx rate of the driver drops and
      the application slows down since it has not yet received ACKs for
      the frames already queued in the hardware. Since this ACK may take
      more than 100ms, stopping the dev queues for entering PS at this
      stage breaks applications, WMM test cases in my testing.
      If there are frames already pending in the tx queue, postponing the
      PS logic helps to avoid redundant queue stops. When power save is
      enabled by default and in a noisy environment, this API certainly
      helps in improving the average throughput.
      Signed-off-by: default avatarVivek Natarajan <vnatarajan@atheros.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      e8306f98
  28. 04 Apr, 2011 1 commit
  29. 31 Mar, 2011 1 commit