So after the previous changes we were still unhappy with how
convoluted the API is and decided to make things simpler for
everybody. This completely changes the rate control API, now
taking into account 802.11n with MCS rates and more control,
most drivers don't support that though.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This adjusts ath9k's signal quality reporting taking into
consideration received beacons at an RSSI of 45 should indicate
you can use of MCS 15 rate (144 Mbps) reliably on dual stream card.
Keep in mind mac80211 does not yet have aggregation fixed but this
should still provide more accurate results.
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

The HT handling has the following deficiencies, which I've
(partially) fixed:
 * it always uses the AP info even if there is no AP,
   hence has no chance of working as an AP
 * it pretends to be HW config, but really is per-BSS
 * channel sanity checking is left to the drivers
 * it generally lets the driver control too much

HT enabling is still wrong with this patch if you have more than
one virtual STA mode interface, but that never happens currently.
Once WDS, IBSS or AP/VLAN gets HT capabilities, it will also be
wrong, see the comment in ieee80211_enable_ht().

Additionally, this fixes a number of bugs:
 * mac80211: ieee80211_set_disassoc doesn't notify the driver any
             more since the refactoring
 * iwl-agn-rs: always uses the HT capabilities from the wrong stuff
               mac80211 gives it rather than the actual peer STA
 * ath9k: a number of bugs resulting from the broken HT API

I'm not entirely happy with putting the HT capabilities into
struct ieee80211_sta as restricted to our own HT TX capabilities,
but I see no cleaner solution for now.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Instead of having a separate callback, use the HW config callback
with a new flag to change retry limits.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This makes mac80211 notify the driver which configuration
actually changed, e.g. channel etc.

No driver changes, this is just plumbing, driver authors are
expected to act on this if they want to.

Also remove the HW CONFIG debug printk, it's incorrect, often
we configure something else.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch cleans up a number of things:
 * the unusable definition of the HT capabilities/HT information
   information elements
 * variable names that are hard to understand
 * mac80211: move ieee80211_handle_ht to ht.c and remove the unused
             enable_ht parameter
 * mac80211: fix bug with MCS rate 32 in ieee80211_handle_ht
 * mac80211: fix bug with casting the result of ieee80211_bss_get_ie
             to an information element _contents_ rather than the
             whole element, add size checking (another out-of-bounds
             access bug fixed!)
 * mac80211: remove some unused return values in favour of BUG_ON
             checking
 * a few minor other things
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This converts pretty much everything to print_mac. There were
a few things that had conflicts which I have just dropped for
now, no harm done.

I've built an allyesconfig with this and looked at the files
that weren't built very carefully, but it's a huge patch.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As I've reported, ath9k currently fails utterly when fragmentation
is enabled. This makes ath9k "support" hardware fragmentation by
not supporting fragmentation at all to avoid the double-free issue.
The patch also changes mac80211 to report errors from the driver
operation to userspace.

That hack in ath9k should be removed once the rate control algorithm
it has is fixed, and we can at that time consider removing the hw
fragmentation support entirely since it's not used by any driver.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Cc: stable@kernel.org
Acked-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

We were not reporting a status code back ath9k_hw_setpower() failed
during reset so lets correct this.
Reported-by: NJiri Slaby <jirislaby@gmail.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is fucking horribe crap code so nuke it. There I cursed too in a commit log.
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Free up 2 bytes in skb->cb to be used for multi-rate retry later.
Move iv_len and icv_len initialization into key alloc.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This enables Adaptive Noise Immunity (ANI) on ath9k.
ANI is as algorithm designed to minimize the detrimental
effects of time-varying interferences. This should
help with throughput in noisy environments. To use
ANI we re-enable the MIB interrupt. Since ANI works
on a timer and updates the noise floor we take
advantage of this and also report a non-static noise
floor now to mac80211.
Signed-off-by: NSujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: NJouni Malinen <Jouni.Malinen@Atheros.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

We were trying to hold the wrong spinlock due to a typo
on IEEE80211_BAR_CTL_TID_S's definition. We use this to
compute the tid number and then hold this this tid number's
spinlock.
Signed-off-by: NVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Part of the cleanup on ath9k -- this was also causing some
annoying compile time warnings.
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This hunk was originally removed as part of "ath9k: Fix IRQ nobody cared
issue with ath9k".
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Long awaited, hard work. This patch totally cleans up the rate control
API to remove the requirement to include internal headers outside of
net/mac80211/.

There's one internal use in the PID algorithm left for mesh networking,
we'll have to figure out a way to clean that one up and decide how to
do the peer link evaluation, possibly independent of the rate control
algorithm or via new API.

Additionally, ath9k is left using the cross-inclusion hack for now, we
will add new API where necessary to make this work properly, but right
now I'm not expert enough to do it. It's still off better than before.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

TSF adjust is needed only for AP mode when staggered beacons
are used. Since we support only a single interface in IBSS mode,
disable setting the TSF adjust register.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

nexttbtt has to be obtained from the timestamp of the beacon
obtained from mac80211. Fix this.
And <asm/unaligned.h> is not needed anymore.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Also, remove comments that are not relevant anymore.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Enabling the MIB interrupts has proven to cause an
interrupt storm after 7 hours of run. We will make use of the
MIB interrupt once we have ANI supported added so for now
to cure this we disable the interrupt.

The interrupt storm can be seen as follows after 7 hours of run
as reported by  Steven Noonan <steven@uplinklabs.net>:

18:28:38          sum   1106.00
18:28:39          sum   1037.62
18:28:40          sum   1069.00
18:28:41          sum   1167.00
18:28:42          sum   1155.00
18:28:43          sum   1339.00
18:28:44          sum  18355.00
18:28:45          sum  17845.45
18:28:46          sum  15285.00
18:28:47          sum  17511.00
18:28:48          sum  17568.69
18:28:49          sum  17704.04
18:28:50          sum  18566.67
18:28:51          sum  18913.13

at 18:28:44 the MIB interrupt kicked off and caused huge
latency which can be seen even on a video he submitted:

http://www.youtube.com/watch?v=4GeCx1gZMpASigned-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

IRQs should be disabled before calling free_irq. Also flush pending
IRQs. Pasted the kernel log message for reference.

kernel: irq 17: nobody cared (try booting with the "irqpoll" option)
kernel:  [<c0252d2c>] __report_bad_irq+0x2e/0x6f
kernel:  [<c0252f22>] note_interrupt+0x1b5/0x207
kernel:  [<c025258b>] ? handle_IRQ_event+0x21/0x48
kernel:  [<c02534cb>] handle_fasteoi_irq+0x8e/0xad
kernel:  [<c0205650>] do_IRQ+0x6c/0x84
kernel:  [<c020425f>] common_interrupt+0x23/0x28
kernel:  [<c034f6f6>] ? acpi_idle_enter_simple+0x198/0x205
kernel:  [<c044686c>] ? menu_select+0x5c/0x78
kernel:  [<c0445a95>] cpuidle_idle_call+0x59/0x89
kernel:  [<c02029d7>] cpu_idle+0xae/0xcf
kernel:  [<c0543102>] rest_init+0x4e/0x50
kernel:  =======================
kernel: handlers:
kernel: [<f88fdd26>] (ath_isr+0x0/0x13a [ath9k])
kernel: Disabling IRQ #17
Signed-off-by: NSenthil Balasubramanian <senthilkumar@atheros.com>
Tested-by: NSteven Noonan <steven@uplinklabs.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Connectivtiy is lost after Group rekeying is done. The keytype
maintained by ath9k is reset when group key is updated. Though
sc_keytype can be reset only for broadcast key the proper fix
would be to use mac80211 provided key type from txinfo during
xmit and get rid of sc_keytype from ath9k ath_softc.
Signed-off-by: NVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: NSenthil Balasubramanian <senthilkumar@atheros.com>
Tested-by: NSteven Noonan <steven@uplinklabs.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

The sta_info->txrate_idx member isn't used by all RC algorithms
in the way it was intended to be used, move it into those that
require it (only PID) and keep track in the core code of which
rate was last used for reporting to userspace and the mesh MLME.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

As more preparation for a saner rate control algorithm API,
share the supported rates bitmap in the public API.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch changes mac80211 to share some more data about
stations with drivers. Should help iwlwifi and ath9k when
 they get around to updating, and might also help with
implementing rate control algorithms without internals.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Cc: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

There's really no reason for mac80211 to be using its
own interface type defines. Use the nl80211 types and
simplify the configuration code a bit: there's no need
to translate them any more now.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

RF kill support is enabled when CONFIG_RFKILL
is set.
Signed-off-by: NVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Some of the functions in main.c are re-ordered in such
a way that all local functions are defined before mac80211
and pci callbacks.
Signed-off-by: NVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch follows 11n spec naming more rigorously replacing MIMO_PS
with SM_PS (Spatial Multiplexing Power Save).

(Originally submitted as 4 patches, "mac80211: change MIMO_PS to SM_PS",
"iwlwifi: change MIMO_PS to SM_PS", "ath9k: change MIMO_PS to SM_PS",
and "iwlwifi: remove double definition of SM PS". -- JWL)
Signed-off-by: NRon Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NZhu Yi <yi.zhu@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Use TX control flag IEEE80211_TX_CTL_ASSIGN_SEQ as a request to update
the seq# for the frames. This will likely require some further cleanup
to get seq# correctly for Beacons vs. other frames and also potentially
for multiple BSSes. Anyway, this is better than ending up sending out
most frames with seq# 0.

(This is a backport of patch w/ same title already in net-next-2.6.
It is verified to fix http://bugzilla.kernel.org/show_bug.cgi?id=11394
and it should be acceptable for -rc due to the driver being new
in 2.6.27.)
Signed-off-by: NJouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

ath9k uses LED classdev functions, so it needs to either select or depend
on them.  This patch uses the same selects that ath5k uses...

drivers/built-in.o: In function `ath_unregister_led':
main.c:(.text+0x138c1d): undefined reference to `led_classdev_unregister'
drivers/built-in.o: In function `ath_register_led':
main.c:(.text+0x139c16): undefined reference to `led_classdev_register'
make[1]: *** [.tmp_vmlinux1] Error 1
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
cc: Jouni Malinen <jmalinen@atheros.com>
Acked-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

It is obviously good for userspace to know up front which
interface modes a given piece of hardware might support (even
if adding such an interface might fail later because of
concurrency issues), so let's make cfg80211 aware of that.
For good measure, disallow adding interfaces in all other
modes so drivers don't forget to announce support for one mode
when they add it.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NStephen Blackheath <tramp.enshrine.stephen@blacksapphire.com>
Signed-off-by: NIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NJouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NJouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch addresses an issue with the locking order. ath_rx_flush_tid()
uses spin_lock/unlock_bh when IRQs are disabled in sta_notify by mac80211.

As node clean up is still pending with ath9k and this problematic portion
of the code is expected to change anyway, thinking of a proper fix may not
be worthwhile. So having this interim fix helps the users to get rid of the
kernel warning message.

Pasted the kernel warning message for reference.

kernel: ath0: No ProbeResp from current AP 00:1b:11:60:7a:3d - assume out of range
kernel: ------------[ cut here ]------------
kernel: WARNING: at kernel/softirq.c:136 local_bh_enable+0x3c/0xab()
kernel: Pid: 1029, comm: ath9k Not tainted 2.6.27-rc4-wt-w1fi-wl
kernel:
kernel: Call Trace:
kernel:  [<ffffffff802278d8>] warn_on_slowpath+0x51/0x77
kernel:  [<ffffffff80224c51>] check_preempt_wakeup+0xf3/0x123
kernel:  [<ffffffff80239658>] autoremove_wake_function+0x9/0x2e
kernel:  [<ffffffff8022c281>] local_bh_enable+0x3c/0xab
kernel:  [<ffffffffa01ab75a>] ath_rx_node_cleanup+0x38/0x6e [ath9k]
kernel:  [<ffffffffa01b2280>] ath_node_detach+0x3b/0xb6 [ath9k]
kernel:  [<ffffffffa01ab09f>] ath9k_sta_notify+0x12b/0x165 [ath9k]
kernel:  [<ffffffff802366cf>] queue_work+0x1d/0x49
kernel:  [<ffffffffa018c3fc>] add_todo+0x70/0x99 [mac80211]
kernel:  [<ffffffffa017de76>] __sta_info_unlink+0x16b/0x19e [mac80211]
kernel:  [<ffffffffa017e6ed>] sta_info_unlink+0x18/0x43 [mac80211]
kernel:  [<ffffffffa0182732>] ieee80211_associated+0xaa/0x16d [mac80211]
kernel:  [<ffffffffa0184a1a>] ieee80211_sta_work+0x4fb/0x6b4 [mac80211]
kernel:  [<ffffffff80469c58>] thread_return+0x30/0xa9
kernel:  [<ffffffffa018451f>] ieee80211_sta_work+0x0/0x6b4 [mac80211]
kernel:  [<ffffffff802362c2>] run_workqueue+0xb1/0x17a
kernel:  [<ffffffff80236be9>] worker_thread+0xd0/0xdb
kernel:  [<ffffffff8023964f>] autoremove_wake_function+0x0/0x2e
kernel:  [<ffffffff80236b19>] worker_thread+0x0/0xdb
kernel:  [<ffffffff8023954a>] kthread+0x47/0x75
kernel:  [<ffffffff80223121>] schedule_tail+0x18/0x50
kernel:  [<ffffffff8020bc49>] child_rip+0xa/0x11
kernel:  [<ffffffff80239503>] kthread+0x0/0x75
kernel:  [<ffffffff8020bc3f>] child_rip+0x0/0x11
kernel:
kernel: ---[ end trace e9bb5da661055827 ]---
Signed-off-by: NSenthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Updating sc_keytype multiple times when groupwise and pairwise
ciphers are different results in incorrect pairwise key type
assumed for TX control and normal ping fails. This works fine
for cases where both groupwise and pairwise ciphers are same.

Also use mac80211 provided enums for key length calculation.
Signed-off-by: NSenthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Use kernel doc syntax for comments and remove a few unused macros.
Signed-off-by: NSujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NSujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

When AR_DurUpdateEna is set, the frame's duration field
is updated by the MAC based on the current rate.
Signed-off-by: NSujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>