linux-stable.git/drivers/net/wireless/ath, branch v3.2.36 Linux kernel stable tree ath9k_hw: Fix signal strength / channel noise reporting 2013-01-03T03:33:33+00:00 Felix Fietkau nbd@openwrt.org 2012-12-10T13:03:17+00:00 f271af61a44cfe3d8c1b74ed4a7b9d79821026eb commit b7c0c238898d200e80487516e2b67aba2a522cc0 upstream. While AR_PHY_CCA_NOM_VAL_* does contain the expected internal noise floor for a chip measured in clean air, it refers to the lowest expected reading. Depending on the frequency, this measurement can vary by about 6db, thus causing a higher reported channel noise and signal strength. Factor in the 6db offset when converting internal noisefloor to channel noise. This patch makes the reported values more accurate for all chips without affecting NF calibration behavior. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit b7c0c238898d200e80487516e2b67aba2a522cc0 upstream.

While AR_PHY_CCA_NOM_VAL_* does contain the expected internal noise floor
for a chip measured in clean air, it refers to the lowest expected reading.

Depending on the frequency, this measurement can vary by about 6db, thus
causing a higher reported channel noise and signal strength.

Factor in the 6db offset when converting internal noisefloor to channel noise.

This patch makes the reported values more accurate for all chips without
affecting NF calibration behavior.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ath9k: ar9003: fix OTP register offsets for AR9340 2013-01-03T03:33:33+00:00 Gabor Juhos juhosg@openwrt.org 2012-12-09T22:57:09+00:00 97a93f6964202d8f25e8a2a284b66b5a2884d81e commit b3cd8021379306c0be6932e4d3b4b01efc681769 upstream. Trying to access the OTP memory on the AR9340 causes a data bus error like this: Data bus error, epc == 86e84164, ra == 86e84164 Oops[#1]: Cpu 0 $ 0 : 00000000 00000061 deadc0de 00000000 $ 4 : b8115f18 00015f18 00000007 00000004 $ 8 : 00000001 7c7c3c7c 7c7c7c7c 7c7c7c7c $12 : 7c7c3c7c 001f0041 00000000 7c7c7c3c $16 : 86ee0000 00015f18 00000000 00000007 $20 : 00000004 00000064 00000004 86d71c44 $24 : 00000000 86e6ca00 $28 : 86d70000 86d71b20 86ece0c0 86e84164 Hi : 00000000 Lo : 00000064 epc : 86e84164 ath9k_hw_wait+0x58/0xb0 [ath9k_hw] Tainted: G O ra : 86e84164 ath9k_hw_wait+0x58/0xb0 [ath9k_hw] Status: 1100d403 KERNEL EXL IE Cause : 4080801c PrId : 0001974c (MIPS 74Kc) Modules linked in: ath9k(O+) ath9k_common(O) ath9k_hw(O) ath(O) ar934x_nfc mac80211(O) usbcore usb_common scsi_mod nls_base nand nand_ecc nand_ids crc_ccitt cfg80211(O) compat(O) arc4 aes_generic crypto_blkcipher cryptomgr aead crypto_hash crypto_algapi ledtrig_timer ledtrig_default_on leds_gpio Process insmod (pid: 459, threadinfo=86d70000, task=87942140, tls=779ac440) Stack : 802fb500 000200da 804db150 804e0000 87816130 86ee0000 00010000 86d71b88 86d71bc0 00000004 00000003 86e9fcd0 80305300 0002c0d0 86e74c50 800b4c20 000003e8 00000001 00000000 86ee0000 000003ff 86e9fd64 80305300 80123938 fffffffc 00000004 000058bc 00000000 86ea0000 86ee0000 000001ff 878d6000 99999999 86e9fdc0 86ee0fcc 86e9e664 0000c0d0 86ee0000 0000700000007000 ... Call Trace: [<86e84164>] ath9k_hw_wait+0x58/0xb0 [ath9k_hw] [<86e9fcd0>] ath9k_hw_setup_statusring+0x16b8/0x1c7c [ath9k_hw] Code: 0000a812 0040f809 00000000 <00531024> 1054000b 24020001 0c05b5dc 2404000a 26520001 The cause of the error is that the OTP register offsets are different on the AR9340 than the actually used values. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit b3cd8021379306c0be6932e4d3b4b01efc681769 upstream.

Trying to access the OTP memory on the AR9340
causes a data bus error like this:

  Data bus error, epc == 86e84164, ra == 86e84164
  Oops[#1]:
  Cpu 0
  $ 0   : 00000000 00000061 deadc0de 00000000
  $ 4   : b8115f18 00015f18 00000007 00000004
  $ 8   : 00000001 7c7c3c7c 7c7c7c7c 7c7c7c7c
  $12   : 7c7c3c7c 001f0041 00000000 7c7c7c3c
  $16   : 86ee0000 00015f18 00000000 00000007
  $20   : 00000004 00000064 00000004 86d71c44
  $24   : 00000000 86e6ca00
  $28   : 86d70000 86d71b20 86ece0c0 86e84164
  Hi    : 00000000
  Lo    : 00000064
  epc   : 86e84164 ath9k_hw_wait+0x58/0xb0 [ath9k_hw]
      Tainted: G           O
  ra    : 86e84164 ath9k_hw_wait+0x58/0xb0 [ath9k_hw]
  Status: 1100d403    KERNEL EXL IE
  Cause : 4080801c
  PrId  : 0001974c (MIPS 74Kc)
  Modules linked in: ath9k(O+) ath9k_common(O) ath9k_hw(O) ath(O) ar934x_nfc
  mac80211(O) usbcore usb_common scsi_mod nls_base nand nand_ecc nand_ids
  crc_ccitt cfg80211(O) compat(O) arc4 aes_generic crypto_blkcipher cryptomgr
  aead crypto_hash crypto_algapi ledtrig_timer ledtrig_default_on leds_gpio
  Process insmod (pid: 459, threadinfo=86d70000, task=87942140, tls=779ac440)
  Stack : 802fb500 000200da 804db150 804e0000 87816130 86ee0000 00010000 86d71b88
          86d71bc0 00000004 00000003 86e9fcd0 80305300 0002c0d0 86e74c50 800b4c20
          000003e8 00000001 00000000 86ee0000 000003ff 86e9fd64 80305300 80123938
          fffffffc 00000004 000058bc 00000000 86ea0000 86ee0000 000001ff 878d6000
          99999999 86e9fdc0 86ee0fcc 86e9e664 0000c0d0 86ee0000 0000700000007000
          ...
  Call Trace:
  [<86e84164>] ath9k_hw_wait+0x58/0xb0 [ath9k_hw]
  [<86e9fcd0>] ath9k_hw_setup_statusring+0x16b8/0x1c7c [ath9k_hw]

  Code: 0000a812  0040f809  00000000 <00531024> 1054000b  24020001  0c05b5dc  2404000a  26520001

The cause of the error is that the OTP register
offsets are different on the AR9340 than the
actually used values.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Revert "ath9k_hw: Update AR9003 high_power tx gain table" 2013-01-03T03:33:32+00:00 Felix Fietkau nbd@openwrt.org 2012-12-06T17:40:11+00:00 c9d0bebf4f44ed7f28965207ead52460b1aee53b commit 9c170e068636deb3e3f96114034bb711675f0faa upstream. This reverts commit f74b9d365ddd33a375802b064f96a5d0e99af7c0. Turns out reverting commit a240dc7b3c7463bd60cf0a9b2a90f52f78aae0fd "ath9k_hw: Updated AR9003 tx gain table for 5GHz" was not enough to bring the tx power back to normal levels on devices like the Buffalo WZR-HP-G450H, this one needs to be reverted as well. This revert improves tx power by ~10 db on that device Signed-off-by: Felix Fietkau <nbd@openwrt.org> Cc: rmanohar@qca.qualcomm.com Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 9c170e068636deb3e3f96114034bb711675f0faa upstream.

This reverts commit f74b9d365ddd33a375802b064f96a5d0e99af7c0.

Turns out reverting commit a240dc7b3c7463bd60cf0a9b2a90f52f78aae0fd
"ath9k_hw: Updated AR9003 tx gain table for 5GHz" was not enough to
bring the tx power back to normal levels on devices like the
Buffalo WZR-HP-G450H, this one needs to be reverted as well.

This revert improves tx power by ~10 db on that device

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: rmanohar@qca.qualcomm.com
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ath9k_hw: Enable hw PLL power save for AR9462 2013-01-03T03:32:58+00:00 Rajkumar Manoharan rmanohar@qca.qualcomm.com 2012-10-25T11:41:31+00:00 247a0b330ef3bb2e642d4bec5c04aee589733a4a commit 1680260226a8fd2aab590319da83ad8e610da9bd upstream. This reduced the power consumption to half in full and network sleep. Cc: Paul Stewart <pstew@chromium.org> Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> [bwh: Backported to 3.2: - INIT_INI_ARRAY macro requires an explicit size argument - Remove the now-redundant macro PCIE_PLL_ON_CREQ_DIS_L1_2P0] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 1680260226a8fd2aab590319da83ad8e610da9bd upstream.

This reduced the power consumption to half in full and network sleep.

Cc: Paul Stewart <pstew@chromium.org>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2:
 - INIT_INI_ARRAY macro requires an explicit size argument
 - Remove the now-redundant macro PCIE_PLL_ON_CREQ_DIS_L1_2P0]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ath9k: Test for TID only in BlockAcks while checking tx status 2012-11-16T16:47:01+00:00 Sven Eckelmann sven@narfation.org 2012-10-29T12:25:20+00:00 ee5e9ba331c346da00557849bbe75ba7e2be3333 commit 6fe7cc71bbf3a0bc28c9cec3c00bc11e81344412 upstream. The ath9k xmit functions for AMPDUs can send frames as non-aggregate in case only one frame is currently available. The client will then answer using a normal Ack instead of a BlockAck. This acknowledgement has no TID stored and therefore the hardware is not able to provide us the corresponding TID. The TID set by the hardware in the tx status descriptor has to be seen as undefined and not as a valid TID value for normal acknowledgements. Doing otherwise results in a massive amount of retransmissions and stalls of connections. Users may experience low bandwidth and complete connection stalls in environments with transfers using multiple TIDs. This regression was introduced in b11b160defc48e4daa283f785192ea3a23a51f8e ("ath9k: validate the TID in the tx status information"). Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Acked-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 6fe7cc71bbf3a0bc28c9cec3c00bc11e81344412 upstream.

The ath9k xmit functions for AMPDUs can send frames as non-aggregate in case
only one frame is currently available. The client will then answer using a
normal Ack instead of a BlockAck. This acknowledgement has no TID stored and
therefore the hardware is not able to provide us the corresponding TID.

The TID set by the hardware in the tx status descriptor has to be seen as
undefined and not as a valid TID value for normal acknowledgements. Doing
otherwise results in a massive amount of retransmissions and stalls of
connections.

Users may experience low bandwidth and complete connection stalls in
environments with transfers using multiple TIDs.

This regression was introduced in b11b160defc48e4daa283f785192ea3a23a51f8e
("ath9k: validate the TID in the tx status information").

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ath9k: fix stale pointers potentially causing access to free'd skbs 2012-11-16T16:46:59+00:00 Felix Fietkau nbd@openwrt.org 2012-10-25T22:31:11+00:00 aba58442cc2198273c9815253030e83ba6f42edc commit 8c6e30936a7893a85f6222084f0f26aceb81137a upstream. bf->bf_next is only while buffers are chained as part of an A-MPDU in the tx queue. When a tid queue is flushed (e.g. on tearing down an aggregation session), frames can be enqueued again as normal transmission, without bf_next being cleared. This can lead to the old pointer being dereferenced again later. This patch might fix crashes and "Failed to stop TX DMA!" messages. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 8c6e30936a7893a85f6222084f0f26aceb81137a upstream.

bf->bf_next is only while buffers are chained as part of an A-MPDU
in the tx queue. When a tid queue is flushed (e.g. on tearing down
an aggregation session), frames can be enqueued again as normal
transmission, without bf_next being cleared. This can lead to the
old pointer being dereferenced again later.

This patch might fix crashes and "Failed to stop TX DMA!" messages.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Revert "ath9k_hw: Updated AR9003 tx gain table for 5GHz" 2012-10-30T23:26:57+00:00 Felix Fietkau nbd@openwrt.org 2012-10-17T11:50:43+00:00 36aa56684247a98e92bf5ca97d8c0833cbe9b909 commit 73b26df5fa1a6245d6fc982362518b620bc7c2fe upstream. This reverts commit a240dc7b3c7463bd60cf0a9b2a90f52f78aae0fd. This commit is reducing tx power by at least 10 db on some devices, e.g. the Buffalo WZR-HP-G450H. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Cc: rmanohar@qca.qualcomm.com Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 73b26df5fa1a6245d6fc982362518b620bc7c2fe upstream.

This reverts commit a240dc7b3c7463bd60cf0a9b2a90f52f78aae0fd.

This commit is reducing tx power by at least 10 db on some devices,
e.g. the Buffalo WZR-HP-G450H.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: rmanohar@qca.qualcomm.com
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ath9k: Disable ASPM only for AR9285 2012-10-17T02:48:55+00:00 Sujith Manoharan c_manoha@qualcomm.com 2012-09-21T18:44:28+00:00 03b6b180216ccfa64746329e9ce71e8fc9df828b commit 046b6802c8d3c8a57448485513bf7291633e0fa3 upstream. Currently, ASPM is disabled for all WLAN+BT combo chipsets when BTCOEX is enabled. This is incorrect since the workaround is required only for WB195, which is a AR9285+AR3011 combo solution. Fix this by checking for the HW version when enabling the workaround. Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com> Tested-by: Paul Stewart <pstew@chromium.org> Signed-off-by: John W. Linville <linville@tuxdriver.com> [bwh: Backported to 3.2: ath9k_hw_get_btcoex_scheme() function is missing] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 046b6802c8d3c8a57448485513bf7291633e0fa3 upstream.

Currently, ASPM is disabled for all WLAN+BT combo chipsets
when BTCOEX is enabled. This is incorrect since the workaround
is required only for WB195, which is a AR9285+AR3011 combo
solution. Fix this by checking for the HW version when enabling
the workaround.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Tested-by: Paul Stewart <pstew@chromium.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2: ath9k_hw_get_btcoex_scheme() function is missing]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ath9k: fix decrypt_error initialization in ath_rx_tasklet() 2012-09-12T02:37:00+00:00 Lorenzo Bianconi lorenzo.bianconi83@gmail.com 2012-08-10T09:00:24+00:00 5e1bf138823dfadd94a6270112d5882d3e4c13d4 commit e1352fde5682ab1bdd2a9e5d75c22d1fe210ef77 upstream. ath_rx_tasklet() calls ath9k_rx_skb_preprocess() and ath9k_rx_skb_postprocess() in a loop over the received frames. The decrypt_error flag is initialized to false just outside ath_rx_tasklet() loop. ath9k_rx_accept(), called by ath9k_rx_skb_preprocess(), only sets decrypt_error to true and never to false. Then ath_rx_tasklet() calls ath9k_rx_skb_postprocess() and passes decrypt_error to it. So, after a decryption error, in ath9k_rx_skb_postprocess(), we can have a leftover value from another processed frame. In that case, the frame will not be marked with RX_FLAG_DECRYPTED even if it is decrypted correctly. When using CCMP encryption this issue can lead to connection stuck because of CCMP PN corruption and a waste of CPU time since mac80211 tries to decrypt an already deciphered frame with ieee80211_aes_ccm_decrypt. Fix the issue initializing decrypt_error flag at the begging of the ath_rx_tasklet() loop. Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit e1352fde5682ab1bdd2a9e5d75c22d1fe210ef77 upstream.

ath_rx_tasklet() calls ath9k_rx_skb_preprocess() and ath9k_rx_skb_postprocess()
in a loop over the received frames. The decrypt_error flag is
initialized to false
just outside ath_rx_tasklet() loop. ath9k_rx_accept(), called by
ath9k_rx_skb_preprocess(),
only sets decrypt_error to true and never to false.
Then ath_rx_tasklet() calls ath9k_rx_skb_postprocess() and passes
decrypt_error to it.
So, after a decryption error, in ath9k_rx_skb_postprocess(), we can
have a leftover value
from another processed frame. In that case, the frame will not be marked with
RX_FLAG_DECRYPTED even if it is decrypted correctly.
When using CCMP encryption this issue can lead to connection stuck
because of CCMP
PN corruption and a waste of CPU time since mac80211 tries to decrypt an already
deciphered frame with ieee80211_aes_ccm_decrypt.
Fix the issue initializing decrypt_error flag at the begging of the
ath_rx_tasklet() loop.

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ath9k: Add PID/VID support for AR1111 2012-08-19T17:15:29+00:00 Mohammed Shafi Shajakhan mohammed@qca.qualcomm.com 2012-08-02T06:28:50+00:00 fca7771ad7eefb4fc86ab2248d291f0ecabd6de7 commit d4e5979c0da95791aa717c18e162540c7a596360 upstream. AR1111 is same as AR9485. The h/w difference between them is quite insignificant, Felix suggests only very few baseband features may not be available in AR1111. The h/w code for AR9485 is already present, so AR1111 should work fine with the addition of its PID/VID. Cc: Felix Bitterli <felixb@qca.qualcomm.com> Reported-by: Tim Bentley <Tim.Bentley@Gmail.com> Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com> Tested-by: Tim Bentley <Tim.Bentley@Gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit d4e5979c0da95791aa717c18e162540c7a596360 upstream.

AR1111 is same as AR9485. The h/w
difference between them is quite insignificant,
Felix suggests only very few baseband features
may not be available in AR1111. The h/w code for
AR9485 is already present, so AR1111 should
work fine with the addition of its PID/VID.

Cc: Felix Bitterli <felixb@qca.qualcomm.com>
Reported-by: Tim Bentley <Tim.Bentley@Gmail.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Tested-by: Tim Bentley <Tim.Bentley@Gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>