1. 30 Sep, 2011 1 commit
    • Johannes Berg's avatar
      mac80211: optimise station flags · c2c98fde
      Johannes Berg authored
      The flaglock in struct sta_info has long been
      something that I wanted to get rid of, this
      finally does the conversion to atomic bitops.
      The conversion itself is straight-forward in
      most places, a few things needed to change a
      bit since we can no longer use multiple bits
      at the same time.
      On x86-64, this is a fairly significant code
      size reduction:
         text	   data	    bss	    dec	    hex
       427861	  23648	   1008	 452517	  6e7a5	before
       425383	  23648	    976	 450007	  6ddd7	after
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
  2. 13 Sep, 2011 1 commit
  3. 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>
  4. 16 May, 2011 2 commits
    • Johannes Berg's avatar
      mac80211: sparse RCU annotations · 40b275b6
      Johannes Berg authored
      This adds sparse RCU annotations to most of
      mac80211, only the mesh code remains to be
      Due the the previous patches, the annotations
      are pretty simple. The only thing that this
      actually changes is removing the RCU usage of
      key->sta in debugfs since this pointer isn't
      actually an RCU-managed pointer (it only has
      a single assignment done before the key even
      goes live). As that is otherwise harmless, I
      decided to make it part of this patch.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
    • Johannes Berg's avatar
      mac80211: fix TX a-MPDU locking · ec034b20
      Johannes Berg authored
      During my quest to make mac80211 not have any RCU
      warnings from sparse, I came across the a-MPDU code
      again and it wasn't quite clear why it isn't racy.
      So instead of assigning the tid_tx array with just
      the spinlock held in ieee80211_start_tx_ba_session
      use a separate temporary array protected only by
      the spinlock and protect all assignments to the
      "live" array by both the spinlock and the mutex so
      that other code is easily verified to be correct.
      Due to pointer assignment atomicity I don't think
      this is a real issue, but I'm not sure, especially
      on Alpha the current code might be problematic.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
  5. 25 Feb, 2011 1 commit
  6. 13 Oct, 2010 1 commit
  7. 06 Oct, 2010 1 commit
  8. 16 Aug, 2010 1 commit
  9. 16 Jul, 2010 1 commit
  10. 14 Jun, 2010 6 commits
  11. 07 Apr, 2010 1 commit
  12. 22 Dec, 2009 1 commit
  13. 21 Dec, 2009 2 commits
    • Johannes Berg's avatar
      mac80211: reduce reliance on netdev · 47846c9b
      Johannes Berg authored
      For bluetooth 3, we will most likely not have
      a netdev for a virtual interface (sdata), so
      prepare for that by reducing the reliance on
      having a netdev. This patch moves the name
      and address fields into the sdata struct and
      uses them from there all over. Some work is
      needed to keep them sync'ed, but that's not
      a lot of work and in slow paths anyway.
      In doing so, this also reduces the number of
      pointer dereferences in many places, because
      of things like sdata->dev->dev_addr becoming
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
    • Johannes Berg's avatar
      mac80211: fix peer HT capabilities · 9a418af5
      Johannes Berg authored
      I noticed yesterday, because Jeff had noticed
      a speed regression, cf. bug
      that the SM PS settings for peers were wrong.
      Instead of overwriting the SM PS settings with
      the local bits, we need to keep the remote bits.
      The bug was part of the original HT code from
      over two years ago, but unfortunately nobody
      noticed that it makes no sense -- we shouldn't
      be overwriting the peer's setting with our own
      but rather keep it intact when masking the peer
      capabilities with our own.
      While fixing that, I noticed that the masking of
      capabilities is completely useless for most of
      the bits, so also fix those other bits.
      Finally, I also noticed that PSMP_SUPPORT no
      longer exists in the final 802.11n version, so
      also remove that.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
  14. 30 Nov, 2009 1 commit
    • Johannes Berg's avatar
      mac80211: fix spurious delBA handling · 827d42c9
      Johannes Berg authored
      Lennert Buytenhek noticed that delBA handling in mac80211
      was broken and has remotely triggerable problems, some of
      which are due to some code shuffling I did that ended up
      changing the order in which things were done -- this was
        commit d75636ef
        Author: Johannes Berg <johannes@sipsolutions.net>
        Date:   Tue Feb 10 21:25:53 2009 +0100
          mac80211: RX aggregation: clean up stop session
      and other parts were already present in the original
        commit d92684e6
        Author: Ron Rindjunsky <ron.rindjunsky@intel.com>
        Date:   Mon Jan 28 14:07:22 2008 +0200
            mac80211: A-MPDU Tx add delBA from recipient support
      The first problem is that I moved a BUG_ON before various
      checks -- thereby making it possible to hit. As the comment
      indicates, the BUG_ON can be removed since the ampdu_action
      callback must already exist when the state is != IDLE.
      The second problem isn't easily exploitable but there's a
      race condition due to unconditionally setting the state to
      OPERATIONAL when a delBA frame is received, even when no
      aggregation session was ever initiated. All the drivers
      accept stopping the session even then, but that opens a
      race window where crashes could happen before the driver
      accepts it. Right now, a WARN_ON may happen with non-HT
      drivers, while the race opens only for HT drivers.
      For this case, there are two things necessary to fix it:
       1) don't process spurious delBA frames, and be more careful
          about the session state; don't drop the lock
       2) HT drivers need to be prepared to handle a session stop
          even before the session was really started -- this is
          true for all drivers (that support aggregation) but
          iwlwifi which can be fixed easily. The other HT drivers
          (ath9k and ar9170) are behaving properly already.
      Reported-by: default avatarLennert Buytenhek <buytenh@marvell.com>
      Cc: stable@kernel.org
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
  15. 18 Nov, 2009 2 commits
  16. 30 Oct, 2009 1 commit
  17. 22 Apr, 2009 2 commits
    • Johannes Berg's avatar
      cfg80211: clean up includes · d3236553
      Johannes Berg authored
      Trying to separate header files into net/wireless.h and
      net/cfg80211.h has been a source of confusion. Remove
      net/wireless.h (because there also is the linux/wireless.h)
      and subsume everything into net/cfg80211.h -- except the
      definitions for regulatory structures which get moved to
      a new header net/regulatory.h.
      The "new" net/cfg80211.h is now divided into sections.
      There are no real changes in this patch but code shuffling
      and some very minor documentation fixes.
      I have also, to make things reflect reality, put in a
      copyright line for Luis to net/regulatory.h since that
      is probably exclusively written by him but was formerly
      in a file that only had my copyright line.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Cc: Luis R. Rodriguez <lrodriguez@atheros.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
    • Johannes Berg's avatar
      mac80211: move ieee80211_enable_ht function to mlme.c · d5522e03
      Johannes Berg authored
      It really belongs into that file since it is only relevant
      for managed mode. Move 1:1, not even whitespace changes,
      but make it static and remove from header file.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
  18. 27 Feb, 2009 2 commits
    • Sujith's avatar
      mac80211: Extend the rate control API with an update callback · 81cb7623
      Sujith authored
      The AP can switch dynamically between 20/40 Mhz channel width,
      in which case we switch the local operating channel, but the
      rate control algorithm is not notified. This patch adds a new callback
      to indicate such changes to the RC algorithm.
      Currently, HT channel width change is notified, but this callback
      can be used to indicate any new requirements that might come up later on.
      Signed-off-by: default avatarSujith <Sujith.Manoharan@atheros.com>
      Acked-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
    • Johannes Berg's avatar
      mac80211: split IBSS/managed code · 46900298
      Johannes Berg authored
      This patch splits out the ibss code and data from managed (station) mode.
      The reason to do this is to better separate the state machines, and have
      the code be contained better so it gets easier to determine what exactly
      a given change will affect, that in turn makes it easier to understand.
      This is quite some churn, especially because I split sdata->u.sta into
      sdata->u.mgd and sdata->u.ibss, but I think it's easier to maintain that
      way. I've also shuffled around some code -- null function sending is only
      applicable to managed interfaces so put that into that file, some other
      functions are needed from various places so put them into util, and also
      rearranged the prototypes in ieee80211_i.h accordingly.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
  19. 13 Feb, 2009 4 commits
  20. 29 Jan, 2009 4 commits
  21. 13 Jan, 2009 1 commit
  22. 19 Dec, 2008 1 commit
  23. 25 Nov, 2008 1 commit
  24. 10 Nov, 2008 1 commit