A few places use just 'q', use 'rxq' there like all
other places.
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The PCIe code has an array of buffer descriptors (RXBs) that have pages
and DMA mappings attached. In regular use, the array isn't used and the
buffers are either on the hardware receive queue or the rx_free/rx_used
lists for recycling.

Occasionally, during module unload, we'd see a warning from this:

WARNING: at lib/list_debug.c:32 __list_add+0x91/0xa0()
list_add corruption. prev->next should be next (c31c98cc), but was c31c80bc. (prev=c31c80bc).
Pid: 519, comm: rmmod Tainted: G        W  O 3.4.24-dev #3
Call Trace:
 [<c10335b2>] warn_slowpath_common+0x72/0xa0
 [<c1033683>] warn_slowpath_fmt+0x33/0x40
 [<c12e31d1>] __list_add+0x91/0xa0
 [<fdf2083c>] iwl_pcie_rxq_free_rbs+0xcc/0xe0 [iwlwifi]
 [<fdf21b3f>] iwl_pcie_rx_free+0x3f/0x210 [iwlwifi]
 [<fdf2dd7a>] iwl_trans_pcie_free+0x2a/0x90 [iwlwifi]

The reason for this seems to be that in iwl_pcie_rxq_free_rbs() we use
the array to free all buffers (the hardware receive queue isn't in use
any more at this point). The function also adds all buffers to rx_used
because it's also used during initialisation (when no freeing happens.)
This can cause the warning because it may add entries to the list that
are already on it. Luckily, this is harmless because it can only happen
when the entire data structure is freed anyway, since during init both
lists are initialized from scratch.

Disentangle this code and treat init and free separately. During init
we just need to put them onto the list after freeing all buffers (for
switching between 4k/8k buffers); during free no list manipulations
are necessary at all.
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In case that an AP/GO interface is started while there is a
station/P2P client associated, need to make sure that the AP/GO
beacon time is far enough from the station's one in oder to allow
the station to receive the DTIM beacons and the following traffic
etc.

To resolve this, when the AP is started, check if there is an
active station interface, and guarantee that the AP/GO TBTT is far
enough from the station one.
Signed-off-by: NIlan Peer <ilan.peer@intel.com>
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Add prints visible to the user when entering and exiting
thrermal throttling, because so users can tell that the
NIC is getting too hot (and throughput will decrease.)
Signed-off-by: Neytan lifshitz <eytan.lifshitz@intel.com>
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

1x1 products will need a special LUT.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The old nl80211 testmode is no longer useful in iwlwifi,
we're moving towards a new model internally and there's
no open tool to use it, so remove it.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

If someone wants to disable AMPDU, there is the 11n_disable
module parameter.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Nobody will ever wants to run without this. Make it true always.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This parameter is really not useful, remove it.
Leave the variable in priv in case someone wants
to play with it.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

When the D3 firmware crashes, it can be helpful for debugging to
resume the system to get the SRAM snapshot to see why it crashed.
Allow enabling this with a debugfs option.
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

As the firmware API has changed significantly and we don't
have support code for the old APIs, bump the version to be
able to release the version 7 API firmware. Unfortunately
this means that the driver in 3.9 and 3.10 can't work, but
that's still better than crashing the device/driver there.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The fw is unreliable in all the cases in which the packet
wasn't sent.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The older devices (pre-7000/3000 series) all only work with the
DVM opmode due to firmware availability, while newer ones will
only work with the MVM opmode for the same reason.

When building a driver that only has one of MVM or DVM, there's
no reason to build the device support and have the PCIe IDs for
all devices since they can't be used anyway, so avoid that.
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Give the scratch area a sub structure so it's marked
explicitly and it is obvious which part it is.
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Instead of using #ifdef CONFIG_IWLWIFI_DEBUG, remove the
iwlwifi_mod_params.debug_level variable completely and
make iwl_have_debug_level() always return false in the
non-debug case. This way, the optimiser will elide all
code for it automatically without having to add #ifdefs.
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Remove calibration per-channel data as it's no longer used.
Signed-off-by: NDavid Spinadel <david.spinadel@intel.com>
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Remove the unused iwl_mvm *mvm parameter from the
iwl_mvm_send_remote_wake_cfg function in D3.c.
Signed-off-by: NOren Givon <oren.givon@intel.com>
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

There's no reason to read the INTA register in the ICT IRQ
handler, this interrupt mechanism is designed to not have
to read as many registers as the regular one. Not reading
the INTA register gives a significant performance/CPU use
improvement.

Since we still want to get this info, fetch it only if
the ISR debug level is enabled.
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Accessing the device in Tx path is not a good idea.
Mirror the data in DRAM.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

iwlmvm does not support concurrent operation of AP with P2P Client/GO.
Update the interface limits to reflect that iwlmvm supports only
concurrent operation of station with AP and P2P Client/GO.
Signed-off-by: NIlan Peer <ilan.peer@intel.com>
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The MCAST queue should be enabled after DTIM only.
According to fw API, the MCAST must not be attached to any
station, but should appear in the mcast_qid of the AP's
mac context only.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The firmware API wasn't being used correctly, fix that.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

We only need EXPORT_SYMBOL_GPL, none of the other things
from module.h, so only include export.h.
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This can happen during development but can cause problems,
WARN (once) and go on.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: NGuy Cohen <guy.cohen@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This code moved and is now far away from the code that takes
the mutex.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Signed-off-by: NSolomon Peachy <pizza@shaftnet.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This is only really useful for people who are bringing up new hardware
designs and have access to the proprietary vendor tools that interface
with this mode.

It'll live out of tree until it's rewritten to use a less kludgy interface.
Signed-off-by: NSolomon Peachy <pizza@shaftnet.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This can live on as an out-of-tree patch for those that care.
Signed-off-by: NSolomon Peachy <pizza@shaftnet.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Support for rt2800 device is broken since my
'rt2x00: rt2x00dev: use rt2x00dev->tx->limit'
patch. The changelog of that commit says that the
TX data queue is initialized already when the
rt2x00lib_probe_hw() function is called.

However as Jakub noticed it, this statement is not
correct. The queue->limit field is initialized in
the rt2x00queue_alloc_entries routine and that is
not yet called when rt2x00lib_probe_hw() runs.
Because the value of tx->limit contains zero, the
driver tries to allocate a kernel fifo with zero
size and kfifo_alloc rejects that with -EINVAL.

  PCI: Enabling device 0000:01:00.0 (0000 -> 0002)
  ieee80211 phy1: rt2x00_set_rt: Info - RT chipset 3071, rev 021c detected
  ieee80211 phy1: rt2x00_set_rf: Info - RF chipset 0008 detected
  ieee80211 phy1: rt2x00lib_probe_dev: Error - Failed to initialize hw
  rt2800pci: probe of 0000:01:00.0 failed with error -22

Move the data_queue field initialization from
the rt2x00queue_alloc_entries routine into the
rt2x00queue_init function. The initialization
code is not strictly related to the allocation,
and the change ensures that the queue_data fields
can be used in the probe routines.

The patch also introduces a helper function in
order to be able to get the correct data_queue_desc
structure for a given queue. This helper is only
needed temporarily and it will be removed later.
Reported-by: NJakub Kicinski <moorray@wp.pl>
Signed-off-by: NGabor Juhos <juhosg@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

GCC 4.8 is spitting out uninitialized-variable warnings against
"drivers/net/wireless/rtlwifi/rtl8192de/dm.c".

drivers/net/wireless/rtlwifi/rtl8192de/dm.c:941:31:
error: 'ofdm_index_old[1]' may be used uninitialized in this
function [-Werror=maybe-uninitialized]
     rtlpriv->dm.ofdm_index[i] = ofdm_index_old[i];

This patch adds initialization to the variable and properly sets its value.
Signed-off-by: NYunlian Jiang <yunlian@google.com>
Acked-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Check for allocation failures and return -ENOMEM.  The caller
already expects it.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This has only one caller and rates[] is an array with
IEEE80211_TX_MAX_RATES (4) elements.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

The optional debugfs interface to the vendor's engineering tools wasn't
bounds checking at all, which made it trivial to perform a buffer
overflow if this interface was compiled in and then explicitly enabled
at runtime.

This patch checks both the length supplied as part of the data to ensure
it is sane, and also the amount of data compared to the remaining buffer
space.  If either is too large, fail immediately.

(This bug was spotted by Dan Carpenter <dan.carpenter@oracle.com>)
Signed-off-by: NSolomon Peachy <pizza@shaftnet.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

goto after return is wrong.

The other code in this block needs to set an
error value then goto an error release block.

This one doesn't need to release anything and
was likely a copy/paste remainder.
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-By: NSolomon Peachy <pizza@shaftnet.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This function doesn't actually exist, remove its declaration.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The Thermal Throttling code could do that, fix it.
Signed-off-by: NEytan Lifshitz <eytan.lifshitz@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>