Continue to popule the PCI layer and the iwl_bus_ops with the power related
stuff.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Get a pointer to the struct device during probe and get the rid of all the PCI
specific DMA wrappers.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Since we have now a PCI layer, all the init and deinit code that is PCI
related should move to there.
Also move the IO functions: read8/read32/write32. They need hw_base which
is killed from priv.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Bus specific layer must know how to return the struct device* of the device.
Implement that as a callback of iwl_bus_ops and use that callback instead of
using the priv->pdev pointer which is meant to disappear soon.
Since the struct device * is needed in hot path, iwl_bus holds a pointer to it
instead of calling get_dev all the time.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
iwl_bus will represent a bus, and iwl_bus_ops all the operations that can be
done on this bus.
For the moment only set_prv_data is implemented. More to come...
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Move some PCI functionality to the new iwl_pci.[ch] files:
* the PCI_DEVICE_TABLE
* the pci_driver struct definition
* the PCI probe / remove functions
* the PCI suspend / resume functions
All these functions are now split: the trigger comes from the PCI layer which
calls to the bus generic code located in the other files.
This is the beginning only. There are still a lot of PCI related code needs
to be gathered.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
It is superfluous to disable the interrupts after we reset the NIC. The only
entity that could enable the interrupts after the NIC is reset is the driver.
So remove this pointless action.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The ucode subtypes keep changing, and there's no
particular reason to be checking them (other than
a paranoid sanity check). Since the numbers are
also in conflict between different ucode images
now, simply don't check them any more and rely on
the images being built correctly.
Also, to indicate that, rename the constants and
the enum, moving it to a different file.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Move no_sleep_autoadjust module parameter into iwlagn_mod_params structure
along with all the other iwlagn module parameters
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Move led_mode module parameter into iwlagn_mod_params structure
along with all the other iwlagn module parameters
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Move bt_coex_active module parameter into iwlagn_mod_params structure
along with all the other iwlagn module parameters
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
For testmode trace function, huge amout of data need to pass to userspace.
Use the build-in nl80211 dumpt it function
Require nl80211 testmode dumpit support patch.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
During channge channel, tx power will not send to uCode, the tx power command
should send after scan complete. but should also can send after RXON command.
Stable fix identified by Stanislaw Gruszka <sgruszka@redhat.com>.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Cc: stable@kernel.org [2.6.38+]
Signed-off-by: John W. Linville <linville@tuxdriver.com>
the code always returns ret regardless, so if(ret) check is unecessary.
Signed-off-by: Greg Dietsche <Gregory.Dietsche@cuw.edu>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Use less indentions and remove uneeded irq-save flags.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
* remove interrupt.g inclusion from netdevice.h -- not needed
* fixup fallout, add interrupt.h and hardirq.h back where needed.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch fixes 802.11n stability and performance regression we have
since 2.6.35. It boost performance on my 5GHz N-only network from about
5MB/s to 8MB/s. Similar percentage boost can be observed on 2.4 GHz.
These are test results of 5x downloading of approximately 700MB iso
image:
vanilla: 5.27 5.22 4.94 4.47 5.31 ; avr 5.0420 std 0.35110
patched: 8.07 7.95 8.06 7.99 7.96 ; avr 8.0060 std 0.055946
This was achieved with NetworkManager configured to do not perform
periodical scans, by configuring constant BSSID. With periodical scans,
after some time, performance downgrade to unpatched driver level, like
in example below:
patched: 7.40 7.61 4.28 4.37 4.80 avr 5.6920 std 1.6683
However patch still make better here, since similar test on unpatched
driver make link disconnects with below messages after some time:
wlan1: authenticate with 00:23:69:35:d1:3f (try 1)
wlan1: authenticate with 00:23:69:35:d1:3f (try 2)
wlan1: authenticate with 00:23:69:35:d1:3f (try 3)
wlan1: authentication with 00:23:69:35:d1:3f timed out
On 2.6.35 kernel patch helps against connection hangs with messages:
iwlagn 0000:20:00.0: queue 10 stuck 3 time. Fw reload.
iwlagn 0000:20:00.0: On demand firmware reload
iwlagn 0000:20:00.0: Stopping AGG while state not ON or starting
Cc: stable@kernel.org # 2.6.35+
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
No need to go though multiple levels of indirect call to send RXON command.
Call it directly
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
After driver split, no need to use function "ops" for post_scan.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Both tx power and power save are being done after scan complete, move into
post_scan function
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
For some timing reason, 1000 device having problem to kick-in to aggregation
without sending rxon assoc command. This is a W/A until find the real reason
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
When change smps mode due to bt coex, save it
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
We use priv->mutex to avoid race conditions between iwl_chswitch_done()
and iwlagn_mac_channel_switch(), when marking channel switch in
progress. But iwl_chswitch_done() can be called in atomic context
from iwl_rx_csa() or with mutex already taken from iwlagn_commit_rxon().
These bugs were introduced by:
commit 79d0732550
Author: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Date: Thu May 6 08:54:11 2010 -0700
iwlwifi: support channel switch offload in driver
To fix remove mutex from iwl_chswitch_done() and use atomic bitops for
marking channel switch pending.
Also remove iwl2030_hw_channel_switch() since 2000 series adapters are
2.4GHz only devices.
Cc: stable@kernel.org # 2.6.36+
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
My patch to advertise interface combinations
worked by pure luck in the P2P case, but all
other cases are broken. This is due to a dumb
mistake in the code that checks what should
be advertised, fix that.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Multiple A-MPDU actions will received from mac80211 while setting up the
aggregation queue, change the message log to better represent the states.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Aggregation will not enable if the traffic is lower than the threshold,
this is not an error condition, so change the logging level.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
With this, iwlwifi will advertise the limits on
concurrency of virtual interfaces.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Fix a memory leak in case request_irq fails.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The exact same error message is used in three different functions in
iwlagn. Add the function name to the error string to disambiguate where
the error is coming from.
Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Remove local variable that was shadowing another one
sta_priv hasn't changed since the beginning of the function, so don't define
another pointer with the same name to the same variable
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The PAN context has three states: disabled, disassociated
and associated. It seems that wasn't quite as much of an
issue in previous versions of the microcode, but now we
really have to use all the three states properly. So add
code to switch accordingly.
Additionally, PAN parameters need to be sent differently
and the timing for PAN RXON needs to be inbetween.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
All agn devices use the same tx power function, remove the ops
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
During channge channel, tx power will not send to uCode, the tx power command
should send after scan complete. but should also can send after RXON command.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
For 6150 devices, modify the supported PCI subsystem ID.
Cc: stable@kernel.org
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Fix compiling error when CONFIG_MAC80211_DEBUGFS is not enabled
drivers/net/wireless/iwlwifi/iwl-agn-rs.c:351: error: 'struct iwl_lq_sta' has no member named 'dbg_fixed_rate'
drivers/net/wireless/iwlwifi/iwl-agn-rs.c:1076: error: 'struct iwl_lq_sta' has no member named 'dbg_fixed_rate'
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
b43: fix comment typo reqest -> request
Haavard Skinnemoen has left Atmel
cris: typo in mach-fs Makefile
Kconfig: fix copy/paste-ism for dell-wmi-aio driver
doc: timers-howto: fix a typo ("unsgined")
perf: Only include annotate.h once in tools/perf/util/ui/browsers/annotate.c
md, raid5: Fix spelling error in comment ('Ofcourse' --> 'Of course').
treewide: fix a few typos in comments
regulator: change debug statement be consistent with the style of the rest
Revert "arm: mach-u300/gpio: Fix mem_region resource size miscalculations"
audit: acquire creds selectively to reduce atomic op overhead
rtlwifi: don't touch with treewide double semicolon removal
treewide: cleanup continuations and remove logging message whitespace
ath9k_hw: don't touch with treewide double semicolon removal
include/linux/leds-regulator.h: fix syntax in example code
tty: fix typo in descripton of tty_termios_encode_baud_rate
xtensa: remove obsolete BKL kernel option from defconfig
m68k: fix comment typo 'occcured'
arch:Kconfig.locks Remove unused config option.
treewide: remove extra semicolons
...
Enabling DEBUG_STRICT_USER_COPY_CHECKS causes the following
warning:
In file included from arch/x86/include/asm/uaccess.h:573,
from include/net/checksum.h:25,
from include/linux/skbuff.h:28,
from drivers/net/wireless/iwlwifi/iwl-agn-rs.c:28:
In function 'copy_from_user',
inlined from 'rs_sta_dbgfs_scale_table_write' at
drivers/net/wireless/iwlwifi/iwl-agn-rs.c:3099:
arch/x86/include/asm/uaccess_64.h:65:
warning: call to 'copy_from_user_overflow' declared with
attribute warning: copy_from_user() buffer size is not provably
correct
presumably due to buf_size being signed causing GCC to fail to
see that buf_size can't become negative.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
When the PAN context is active, but unused, it
may still block scans that take more dwell time
than its beacon interval (which is odd). Work
around this problem by using a default beacon
interval of 200 so scans will fit between.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
gcc is warning that a few variables in rate
scaling are set but never otherwise used.
This pointed out a few simplifications.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Before send the RXON command with associated flag set, always do disassociate
first to make sure uCode is in the correct state.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
No functional changes, just logging more information when uCode crash, also
change change the format.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The current "huge" command handling is a bit
confusing, and very limited since only one
command may be huge at a time. Additionally,
we often copy data around quite pointlessly
since we could instead map the existing scan
buffer for example and use it directly.
This patch makes that possible. The first
change is that multiple buffers may be given
to each command (this change was prepared
earlier so callsites don't need to change).
Each of those can be mapped attached to a TB
in the TFD, and the command header can use a
TB (the first one) in the TFD as well.
Doing this allows getting rid of huge commands
in favour of mapping existing buffers. The
beacon transmission is also optimised to not
copy the SKB at all but use multiple TBs.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The pad argument to iwlagn_txq_free_tfd
isn't used, remove it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
All of these functions no longer need to be
accessed indirectly since they're shared in
all AGN devices.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
In a subsequent patch, I want to make commands use
multiple TBs in a TFD. This is a simple change to
prepare the data structures for this, with as of
now still just a single TB supported.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The function iwl_is_any_associated() was intended
to check both contexts, but due to an oversight
it only checks the BSS context. This leads to a
problem with scanning since the passive dwell
time isn't restricted appropriately and a scan
that includes passive channels will never finish
if only the PAN context is associated since the
default dwell time of 120ms won't fit into the
normal 100 TU DTIM interval.
Fix the function by using for_each_context() and
also reorganise the other functions a bit to take
advantage of each other making the code easier to
read.
Cc: stable@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
commit 5ed540aecc change the led behavior
for iwlwifi driver; the side effect cause led blink all the time.
Modify the led blink table to fix this problem
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
DMA mappings can fail, but the current code
doesn't check for that. Add checking, which
requires some restructuring for proper error
paths.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
All AGN devices need the bytecount table, so
remove the indirection and make the functions
static again.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The device doesn't use the bytecount table for the
command queue, only for aggregation queues to make
aggregation decisions. So don't update it for the
command queue (and we even updated it with wrong
values).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The variable 'len' here is set but never used.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The frame pre-allocation is quite a bit of complex
code, all to avoid a single allocation. Remove it
and consolidate the beacon sending code.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
There's no need for this, all commands are the right size.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
This patch adds the feature to support the test mode operation through
the generic netlink channel NL80211_CMD_TESTMODE between intel
wireless device iwlwifi and the user space application svtool.
The main purpose is to create a transportation layer between the iwlwifi
device and the user space application so that the interaction between the
user space application svtool and the iwlwifi device in the kernel space is
in a way of generic netlink messaging.
The detail specific functions are:
1. The function iwl_testmode_cmd() is added to digest the svtool test command
from the user space application. The svtool test commands are categorized to
three types : commands to be processed by the device ucode, commands to access
the registers, and commands to be processed at the driver level(such as reload
the ucode). iwl_testmode_cmd() dispatches the commands the corresponding handlers
and reply to user space regarding the command execution status. Extra data is
returned to the user space application if there's any.
2. The function iwl_testmode_ucode_rx_pkt() is added to multicast all the spontaneous
messages from the iwlwifi device to the user space. Regardless the message types,
whenever there is a valid spontaneous message received by the iwlwifi ISR,
iwl_testmode_ucode_rx_pkt() is invoked to multicast the message content to user
space. The message content is not attacked and the message parsing is left to
the user space application.
Implementation guidelines:
1. The generic netlink messaging for iwliwif test mode is through NL80211_CMD_TESTMODE
channel, therefore, the codes need to follow the regulations set by cfg80211.ko
to get the actual device instance ieee80211_ops via cfg80211.ko, so that the iwlwifi
device is indicated with ieee80211_ops and can be actually accessed.
Therefore, a callback iwl_testmode_cmd() is added to the structure
iwlagn_hw_ops in iwl-agn.c.
2. It intends to utilize those low level device access APIs from iwlwifi device driver
(ie. iwlagn.ko) rather than creating it's own set of device access functions.
For example, iwl_send_cmd(), iwl_read32(), iwl_write8(), and iwl_write32() are reused.
3. The main functions are maintained in new files instead of spreading all over the
existing iwlwifi driver files.
The new files added are :
drivers/net/wireless/iwlwifi/iwl-sv-open.c
- to handle the user space test mode application command
and reply the respective command status to the user space application.
- to multicast the spontaneous messages from device to user space.
drivers/net/wireless/iwlwifi/iwl-testmode.h
- the commonly referenced definitions for the TLVs used in
the generic netlink messages
Signed-off-by: Cindy H. Kao <cindy.h.kao@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
If an interface type changes from a type that is
only supported on the PAN context (e.g. P2P GO)
to a type that is supported on the BSS context,
and the BSS context is not in use, then we need
to use the BSS context instead of changing the
device type within the context. To achieve this,
refuse the type change, which causes a down/up
cycle that will allocate the BSS context for the
interface.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The current RXON checking doesn't verify that
the channel is valid (or at least non-zero),
so add that. Also, add a WARN() so we get a
stacktrace, and capture a bitmask of errors
in order to capture all necessary information
in the warning itself (in case the previous
messages are snipped off.)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
This header file isn't used, and if we ever need
these definitions they shouldn't be added to a
driver but rather to the common 802.11 include
file that has all frame definitions. Thus, just
remove it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
All agn devices use the same eeprom semaphore and calib version routines.
Delete the indirection and move the semaphore routines to where they are
used and make static.
Signed-off-by: Don Fry <donald.h.fry@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
All agn devices use the same module parameter structure. Delete the
indirection and access the structure diretly.
Signed-off-by: Don Fry <donald.h.fry@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
New microcode versions use the good CRC threshold
field differently, as a flag, and in that case we
should set it to 1/0 instead of 1/65535 for an
active/passive scan.
The new behaviour is advertised by the uCode with
a feature flag.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
No functional changes, separate the connect and disconnect sequences in
RXON commit function, easier to read and understand.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The WoWLAN resume code will have to essentially
do a restart, but without going through the work
struct. To support that, refactor the restart by
splitting out the preparation code into a new
function.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
There are a few cases like the WoWLAN support
I'm writing that require attempting to access
the NIC when it is known that it might not be
accessible, e.g. after the system woke up and
the platform might have reset the device.
To avoid messages in this case, introduce the
new function iwl_grab_nic_access_silent(), it
will only return an error status.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
If a device error happens while the uCode is
being loaded or initialised, we will attempt
to restart the device (which will likely fail
again, but that's not the issue here). During
this new restart, we turn off the device, but
as the uCode failed to initialise it already
is turned off. As a consequence, grabbing NIC
access will fail and cause excessive messages
and hangs.
To fix this issue, introduce a new status bit
and only attempt to reprogram the device when
it isn't already disabled.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Since
commit f844a709a7
Author: Stanislaw Gruszka <sgruszka@redhat.com>
Date: Fri Jan 28 16:47:44 2011 +0100
iwlwifi: do not set tx power when channel is changing
we set device tx power during initialization to priv->tx_power_next,
which itself is initialized to minimum power. That changed
default behaviour of driver. Previously we initialized device to
transmit at maximum available power by default. Patch change again
to previous behaviour and cleanup tx power initialization.
Fortunately this is not critical fix, as mac80211 layer setup
tx power lately to 14dB, hence device does not operate at minimal
transmit power all the time.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Need to use broadcast sta_id for management frames, otherwise we broke
BA session in the firmware and get messages like that:
"Received BA when not expected"
or (on older kernels):
"BA scd_flow 0 does not match txq_id 10"
This fix regression introduced in 2.6.35 during station management
code rewrite by:
commit 2a87c26bbe
Author: Johannes Berg <johannes.berg@intel.com>
Date: Fri Apr 30 11:30:45 2010 -0700
iwlwifi: use iwl_find_station less
Patch partially resolve:
https://bugzilla.kernel.org/show_bug.cgi?id=16691
However, there are still 11n performance problems on 4965 and 5xxx
devices that need to be investigated.
Cc: stable@kernel.org # 2.6.35+
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Resolved logic conflicts causing a build failure due to
drivers/net/r8169.c changes using a patch from Stephen Rothwell.
Signed-off-by: David S. Miller <davem@davemloft.net>
Using C line continuation inside format strings is error prone.
Clean up the unintended whitespace introduced by misuse of \.
Neaten correctly used line continations as well for consistency.
drivers/scsi/arcmsr/arcmsr_hba.c has these errors as well,
but arcmsr needs a lot more work and the driver should likely be
moved to staging instead.
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
My commit 3598e1774c
"iwlwifi: fix enqueue hcmd race conditions" move hcmd callback after
command queue reclaim, to avoid call it with hcmd_lock. But since
queue read index was updated, cmd data can be overwritten. Fix problem
by calling callback before taking hcmd_lock and queue reclaim.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This variable is only ever checked right after
the function that sets it, but the same function
will also return the status, so we can pass it
through instead of checking hw_ready later.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
On new hardware, ucode images always come in
pairs: code and data. Therefore, combine the
variables into an appropriate struct and use
that when both code and data are needed.
Also, combine allocation and copying so that
we have less code in total.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The current firmware loading mechanism in
iwlwifi is very hard to follow, and thus
hard to maintain. To make it easier, make
the firmware loading synchronous.
For now, as a side effect, this removes a
number of retry possibilities we had. It
isn't typical for this to fail, but if it
does happen we restart from scratch which
this also makes easier to do should it be
necessary.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
When the firmware encounters an error while the
driver is waiting for a notification, it will
never get that notification. Therefore, instead
of timing out, bail out on errors when waiting
for notifications.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
We're unlikely to care about the actual time spent
waiting, so make the function return an error code
which is less error prone in coding new uses.
Also, while at it, mark __must_check.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
A notification wait function is called with the
command, but currently has no way of passing
data back to the caller -- fix that by adding a
void pointer to the function that can be used
between the caller and the function.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Starting the device consists of many things,
refactor out enabling the hardware and also
return -ERFKILL when the rfkill signal is
found to be asserted (which makes more sense
anyway, but is also required now to make the
__iwl_up function return right away.)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The iwl_down path really consists of multiple things,
refactor out the hardware resetting (including, of
course, related software state like irqs).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
There's no point in running through iwl_down()
when we never registered with mac80211, as it
just cleans up internal structures that were
never initialised in this case. Therefore we
can also remove the special handling for this
case from __iwl_down().
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The current code to read the error table header
just hardcodes all the offsets, which is a bit
hard to understand. We can read in the entire
header (as much as we need) into a structure,
and then take the data from there, which makes
it easier to understand. To read a bigger blob
we also don't need to grab NIC access for each
word read, making the code more efficient.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Since
commit a120e912eb
Author: Stanislaw Gruszka <sgruszka@redhat.com>
Date: Fri Feb 19 15:47:33 2010 -0800
iwlwifi: sanity check before counting number of tfds can be free
we use skb->data after calling ieee80211_tx_status_irqsafe(), which
could free skb instantly.
On current kernels I do not observe practical problems related with
bug, but on 2.6.35.y it cause random system hangs when stressing
wireless link.
Cc: stable@kernel.org # 2.6.32+
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
When testing some new P2P code, Angie found that the
driver might crash because the beacon command ended
up being bigger than a regular command. This is quite
obvious -- a normal command is limited to roughly 360
bytes but a beacon may be much larger of course.
To fix this, use the huge command buffer.
Reported-by: Angie Chinchilla <angie.v.chinchilla@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Since huge commands all share a single buffer,
there can only be a single one in flight at a
time since otherwise they'd overwrite each
other. This is true in the driver now, but it
seems like a possible source of bugs, so add
a test to verify that huge commands are always
sent synchronously.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
There are a number of things in the driver that
may result in a BUG(), which is suboptimal since
it's hard to get debugging information out of
the driver in that case and the user experience
is also not good :-)
Almost all BUG_ON instances can be converted to
WARN_ON with a few lines of appropriate error
handling, so do that instead.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
For some reason, sending QoS configuration causes transmission to stop
after a single frame on HT channels when not associated. Removing the
extra QoS configuration has no effect on station mode, and fixes
injection mode.
Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (34 commits)
net: Add support for SMSC LAN9530, LAN9730 and LAN89530
mlx4_en: Restoring RX buffer pointer in case of failure
mlx4: Sensing link type at device initialization
ipv4: Fix "Set rt->rt_iif more sanely on output routes."
MAINTAINERS: add entry for Xen network backend
be2net: Fix suspend/resume operation
be2net: Rename some struct members for clarity
pppoe: drop PPPOX_ZOMBIEs in pppoe_flush_dev
dsa/mv88e6131: add support for mv88e6085 switch
ipv6: Enable RFS sk_rxhash tracking for ipv6 sockets (v2)
be2net: Fix a potential crash during shutdown.
bna: Fix for handling firmware heartbeat failure
can: mcp251x: Allow pass IRQ flags through platform data.
smsc911x: fix mac_lock acquision before calling smsc911x_mac_read
iwlwifi: accept EEPROM version 0x423 for iwl6000
rt2x00: fix cancelling uninitialized work
rtlwifi: Fix some warnings/bugs
p54usb: IDs for two new devices
wl12xx: fix potential buffer overflow in testmode nvs push
zd1211rw: reset rx idle timer from tasklet
...
If we maintain API properly, then there isn't
really a reason to warn about this since we'll
just be adding things that are safe to ignore,
so downgrade the warning to debug info level.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
There's no need to keep both normal and BT statistics
versions around all the time in memory when we only
use a subset of both. So keep only the subsets that
we need in memory, depending on the debug config).
Also, in doing so, we can remove all the calls to
iwl_bt_statistics() in the driver as we'll just
access the copied statistics now.
Finally, also remove this call from the one place
where it might still be needed and automatically
detect what kind of statistics the device is sending
based on their size. This way, we don't need to keep
track of which devices do what any more, which is
good since this is subject to change based on the
ucode version (as some ucode even for non-BT devices
will in fact use BT statistics).
Warn upon encountering a statistics command from the
ucode that isn't known, so we will find such issues
earlier in the future.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Tested-by: Don Fry <donald.h.fry@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
If change_interface gets invoked during a firmware
restart, it may crash; prevent that from happening
by checking if ctx->vif is assigned.
Additionally, in my initial commit I forgot to set
the vif->p2p variable correctly, so fix that too.
Cc: stable@kernel.org [2.6.38+]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
The microcode may sometimes reject TX frames when
on a radar channel even after we associated as it
clears information during association and needs to
receive a new beacon before allowing that channel
again. This manifests itself as a TX status value
of TX_STATUS_FAIL_PASSIVE_NO_RX. So in this case,
stop the corresponding queue and give the frame
back to mac80211 for retransmission. We start the
queue again when a beacon from the AP is received
which will make the regulatory enforcement in the
device allow transmitting again.
Signed-off-by: Garen Tamrazian <garenx.tamrazian@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
define of firmware filenames use extra macro to build the files name.
Signed-off-by: Jay Sternberg <jay.e.sternberg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
This generates a massive reduction in module size:
with debug:
text data bss dec hex filename
670300 13136 420 683856 a6f50 iwlagn.ko (before)
388347 13136 408 401891 621e3 iwlagn.ko (after)
without debug:
text data bss dec hex filename
528575 13072 420 542067 84573 iwlagn.ko (before)
294192 13072 408 307672 4b1d8 iwlagn.ko (after)
This also removes all the IO debug functionality since
it can easily be replaced by tracing, and makes the
code unnecessarily complex.
I haven't done any CPU utilisation measurements, but
given that the hotpaths don't use much IO it is not
likely to have a negative impact; in fact, the size
reduction will reduce cache pressure which possibly
improves performance.
Finally, an unused function or two were removed.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The ISR (interrupt service routine) ops are now
no longer necessary since they are the same for
all devices this driver now handles.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
We never use the value in alloc_rxb_page,
so there's no point in keeping it either.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The rev_id variable is only printed, we
don't need to store it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The hw_rev variable is used only during init,
so there's no need to keep it around.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The variable is never used.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Again, a 4965 specific code path that we no
longer need in iwlagn.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
We know after loading the ucode whether it will
support PAN or not, so we can also initialise
the cmd_queue variable much earlier.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Devices newer than 4965 don't actually send
two different versions of the ALIVE command,
so we always had a bug here since before this
patch we copy more data than we got. Remove
the iwl_init_alive_resp struct and don't use
it.
Since we also really don't need to track all
the data received in ALIVE as we only use the
error and log event tables later, we can also
save space by just keeping those and not more
data around in memory.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
My previous patch left a message talking about
bootstrap, but that's clearly bogus.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Some new devices and microcode files will a greater
variety of features, so the TLV-per-feature approach
we took before will quickly make things harder to
manage and increase the file size.
Add a new TLV that has feature flags. Currently, it
will contain:
1) a PAN feature flag, which moves from a separate
TLV
2) a new BT stats bit that indicates whether the
microcode image uses bluetooth statistics
3) a new MFP flag for management frame protection
which can be enabled once the device/microcode
supports it
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
In alive notify, we should check return code instead of assume everything ok
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This was used only on 4965 in conjunction with
the bootstrap ucode.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The ucode restart has to take into account a number
of things, like clearing the HCMD_ACTIVE and other
status bits, and waking up the wait_command_queue.
Currently, however, there are a number of places
that neither do that, nor actually set the FW error
bit that leads to proper restart handling, which
means that in those cases things will probably just
hang completely.
To clean this up, make all ucode restart go through
a single function, except for the cases where it's
called during firmware loading.
Also fix a bug in wimax coexist restart avoidance,
it needs to first clear the status bits (and it has
to clear the HCMD_ACTIVE one as well) and then wake
up anything waiting on wait_command_queue.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Only 4965 had a bootstrap microcode image, so
the agn driver can completely ignore that and
we can remove some code from it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
When we loaded a ucode, there's no point in
checking any one that is present, we know
which one is supposed to be present so also
verify that it is exactly the right one.
That also simplifies the code and makes it
faster since it doesn't have to check all.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The code in iwlcore_verify_inst_sparse really
doesn't need to keep track of the number of
errors it encountered since a single one is
fatal.
Also, the code in iwl_verify_inst_full is just
used to print out some things, so rename it to
iwl_print_inst and don't give it a return code
and just make it print out the values.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
In alive notification call, return the status from iwl_send_calib_results()
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
A number of places just use a variable to return
it right away, which is useless, so let's remove
the variables there.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
All agn devices behave the same, so there's no
need to go through function pointers for any
of the ucode loading functionality.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Now that these handlers are no longer shared
between 4965 and agn, they can be static.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
When the driver was split, a bunch of definitions
for the 3945 and 4965 devices stayed around, but
they're now useless so remove (some of) them.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Some code was removed, but a variable it used
and that is now unused stayed around, kill it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
We now use priv->mutex to serialize sync command, remove old
priv->sync_cmd_mutex and add assertion that priv->mutex must be locked.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Check status bits with mutex taken, because when we wait for mutex
unlock, status can change. Patch should also make remaining sync
commands be send with priv->mutex taken. That will prevent execute
these commands when we are currently reset firmware, what could
possibly cause troubles.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
We mark command as huge by using meta->flags from other (non huge) command,
but flags can be possibly overridden, when non huge command is enqueued,
what can lead to:
WARNING: at lib/dma-debug.c:696 dma_debug_device_change+0x1a3/0x1f0()
DMA-API: device driver has pending DMA allocations while released from device [count=1]
To fix introduce additional CMD_MAPPED to mark command as mapped and
serialize iwl_enqueue_hcmd() with iwl_tx_cmd_complete() using
hcmd_lock. Serialization will also fix possible race conditions,
because q->read_ptr, q->write_ptr are modified/used in parallel.
On the way fix whitespace.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
At least EEPROM version 0x11A has the wrong
number of chains programmed into it for some
reason, so we need to override in the driver.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
A number of these devices have appeared "in the wild", and apparently
the Windows driver is perfectly happy to support this EEPROM version.
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Cc: stable@kernel.org
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
We initialize exit_pending twice. It's the second initialization which
is correct. That was added in d745d472af "iwlwifi: cancel scan when
down the device".
Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This gives much better performance at fast 3x3 rates (up to ~160 Mbps).
The scheduler will still make most decisions about batch size based on
available packets and RX parameters.
Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Throughout the code we use rate_n_flags & 0xff to extract the lower byte
of the rate_n_flags u32 that contains the information about the rate.
Add a #define and remove the use of the magic number.
Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Since the driver split, there's no need for no_agg_framecnt_info since
all devices have this set to false. Secondly, the compressed block ack
handling code was broken. Fix this.
(1) A shift less than zero simply implies that the buffer wrapped, this
is expected. Remove the incorrect comment.
(2) The (agg->frame_count > (64-sh)) condition can happen if the last
frame is dropped. E.g., if I send 7 frames and the 6th is received but
the 7th is lost, the other side may only shift the window 6, not 7
frames since the last bit is a 0. This is perfectly fine behavior and
doesn't invalidate the feedback.
(3) Store the feedback from a Compressed BA in the first newly received
frame, rather than the start of the window. This way it will get
processed by the rate selection code. Feedback stored in a non-received
frame is likely to get overwritten by the retransmission.
This is based on the approach taken by minstrel_ht.
Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
When filling out its rate scale table, iwlwifi repeats the first HT rate
IWL_HT_NUMBER_TRY times. The hardware scheduler will stop using
aggregation for any frame that fails LINK_QUAL_AGG_DISABLE_START_DEF
times. Currently, both these constants equal 3.
If iwlwifi probes a faster rate than the link supports, all frames in a
(potentially tens of frames large) batch will fail IWL_HT_NUMBER_TRY
times. Because this happens to be as large as
LINK_QUAL_AGG_DISABLE_START_DEF, all frames will then be sent
individually. This leads to a short, but performance-degrading window
where the legacy stop-and-wait MAC takes over.
Bounding the initial rate by (LINK_QUAL_AGG_DISABLE_START_DEF-1)
attempts makes the third try use a lower rate and hence more be likely
to succeed. This somewhat mitigates the above described behavior.
Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
iwlagn's hardware scheduler needs to be set up
with the right aggregation frame limit and
buffer sizes. To achieve this, we need to move
the hardware queue setup to when the session
becomes operational.
Tested-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Since the driver split, there's no need for
function pointers any more for aggregation
queue setup and teardown as all devices now
share the same code. Simplify this.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Clearly a mistake, since pointers won't suddenly
change their value...
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
We should unlock here instead of returning -EINVAL directly.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Add support to iwlagn for off-channel TX. The
microcode API for this is a bit strange in that
it uses a hacked-up scan command, so the scan
code needs to change quite a bit to accomodate
that and be able to send it out.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Usually H/W generate statistics notify once per about 100ms, but
sometimes we can receive notify in shorter time, even 2 ms.
This can be problem for plcp health and ack health checking.
I.e. with 2 plcp errors happens randomly in 2 ms duration, we
exceed plcp delta threshold equal to 100 (2*100/2).
Also checking ack's in short time, can results not necessary false
positive and firmware reset, for example when channel is noised and
we do not receive ACKs frames or when remote device does not send
ACKs at the moment.
Patch change code to do statistic check and possible recovery only
if 99ms elapsed from last check. Forced delay should assure we have
good statistic data to estimate hardware state.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Make iwl_good_plcp_health code easiest to read.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Put generic rx_handlers (except iwlagn_rx_reply_compressed_ba) to
iwl-rx.c . Make functions static and change prefix from iwlagn_ to
iwl_ . Beautify iwl_setup_rx_handlers and do some other minor coding
style changes.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The temperature reported by 'cat /sys/class/net/wlan?/device/temperature'
is incorrect for devices with BT capability. Report the value from the
correct statistics structure. Tested with 130, 100, 6205 and 5300.
Signed-off-by: Don Fry <donald.h.fry@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
iwlagn: Support new 1000 microcode.
New iwlwifi-1000 microcode requires driver support for API version 5.
(There is no version 4)
Signed-off-by: Don Fry <donald.h.fry@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Several more network drivers that read the device's revision ID
from the PCI configuration register were merged after the commit
44c10138fd (PCI: Change all drivers
to use pci_device->revision), so it's time to do another pass of
conversion to using the 'revision' field of 'struct pci_dev'...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Acked-by: "John W. Linville" <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is no need to have separate iwl-agn-rx.c file after iwlegacy
split.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Remove check_plcp_health and check_ack_health ops methods, they are
unneeded after iwlegacy driver split. Merge check health code into to
iwl-rx.c and make functions static.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Add module ack_check, and plcp_check parameters. Ack_check is disabled
by default since is proved that check ack health can cause troubles.
Plcp_check is enabled by default.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Since commit commit 470058e0ad
"iwlwifi: avoid Tx queue memory allocation in interface down" we do
not unmap dma and free skbs when down device and there is pending
transfer. What in consequence may cause that system hung (waiting
for free skb's) when performing shutdown at iptables module unload.
DMA leak manifest itself following warning:
WARNING: at lib/dma-debug.c:689 dma_debug_device_change+0x15a/0x1b0()
Hardware name: HP xw8600 Workstation
pci 0000:80:00.0: DMA-API: device driver has pending DMA allocations while released from device [count=240]
Modules linked in: iwlagn(-) aes_x86_64 aes_generic fuse cpufreq_ondemand acpi_cpufreq freq_table mperf xt_physdev ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 ext3 jbd dm_mirror dm_region_hash dm_log dm_mod uinput hp_wmi sparse_keymap sg wmi microcode serio_raw tg3 arc4 ecb shpchp mac80211 cfg80211 rfkill ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif firewire_ohci firewire_core crc_itu_t mptsas mptscsih mptbase scsi_transport_sas pata_acpi ata_generic ata_piix ahci libahci floppy nouveau ttm drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: iwlagn]
Pid: 9131, comm: rmmod Tainted: G W 2.6.38-rc6-wl+ #33
Call Trace:
[<ffffffff810649ef>] ? warn_slowpath_common+0x7f/0xc0
[<ffffffff81064ae6>] ? warn_slowpath_fmt+0x46/0x50
[<ffffffff812320ab>] ? dma_debug_device_change+0xdb/0x1b0
[<ffffffff8123212a>] ? dma_debug_device_change+0x15a/0x1b0
[<ffffffff8149dc18>] ? notifier_call_chain+0x58/0xb0
[<ffffffff8108e370>] ? __blocking_notifier_call_chain+0x60/0x90
[<ffffffff8108e3b6>] ? blocking_notifier_call_chain+0x16/0x20
[<ffffffff812f570c>] ? __device_release_driver+0xbc/0xe0
[<ffffffff812f5808>] ? driver_detach+0xd8/0xe0
[<ffffffff812f45d1>] ? bus_remove_driver+0x91/0x100
[<ffffffff812f6022>] ? driver_unregister+0x62/0xa0
[<ffffffff8123d5d4>] ? pci_unregister_driver+0x44/0xa0
[<ffffffffa05632d1>] ? iwl_exit+0x15/0x1c [iwlagn]
[<ffffffff810ab492>] ? sys_delete_module+0x1a2/0x270
[<ffffffff81498da9>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[<ffffffff8100bf42>] ? system_call_fastpath+0x16/0x1b
I still can observe above warning after apply patch, but it is very
hard to reproduce it, and have count=1. Whereas that one is easy to
reproduce using debugfs force_reset while transmitting data, and have
very big counts eg. 240, like quoted here. So count=1 WARNING seems
to be different issue that need to be resolved separately.
v1 -> v2: fix infinity loop bug I made during "for" to "while" loop transition.
v2 -> v3: remove unneeded EXPORT_SYMBOL
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This function was intended to calculate the
number of RX chains needed, but could only
work where the AP's streams were asymmetric,
i.e. 2 TX and 3 RX or similar. In the case
where IEEE80211_HT_MCS_TX_RX_DIFF was not
set, this function would calculate the wrong
information.
Additionally, mac80211 didn't pass through
the required values at all, so it couldn't
work anyway.
Rewrite the logic in this function and add
appropriate comments to make it readable.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The return value of the tx operation is commonly
misused by drivers, leading to errors. All drivers
will drop frames if they fail to TX the frame, and
they must also properly manage the queues (if they
didn't, mac80211 would already warn).
Removing the ability for drivers to return a BUSY
value also allows significant cleanups of the TX
TX handling code in mac80211.
Note that this also fixes a bug in ath9k_htc, the
old "return -1" there was wrong.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Tested-by: Sedat Dilek <sedat.dilek@googlemail.com> [ath5k]
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com> [rt2x00]
Acked-by: Larry Finger <Larry.Finger@lwfinger.net> [b43, rtl8187, rtlwifi]
Acked-by: Luciano Coelho <coelho@ti.com> [wl12xx]
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The flag isn't very descriptive -- the intention
is that the driver provides a TSF timestamp at
the beginning of the MPDU -- make that clearer
by renaming the flag to RX_FLAG_MACTIME_MPDU.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
New iwlwifi-5000 microcode requires driver support for API version 5.
Signed-off-by: Don Fry <donald.h.fry@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Intel WiFi devices 3945 and 4965 now have their own driver in the folder
drivers/net/wireless/iwlegacy
Add support to build these drivers independently of the driver for
AGN devices. Selecting the 3945 builds iwl3945.ko and iwl_legacy.ko,
and selecting the 4965 builds iwl4965.ko and iwl_legacy.ko. iwl-legacy.ko
contains code shared between both devices.
The 3945 is an ABG/BG device, with no support for 802.11n. The 4965 is a 2x3
ABGN device.
Signed-off-by: Meenakshi Venkataraman <meenakshi.venkataraman@intel.com>
Acked-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Intel WiFi devices 3945 and 4965 now have their own driver in the folder
drivers/net/wireless/iwlegacy
Add support to build these drivers independently of the driver for
AGN devices. Selecting the 3945 builds iwl3945.ko and iwl_legacy.ko,
and selecting the 4965 builds iwl4965.ko and iwl_legacy.ko. iwl-legacy.ko
contains code shared between both devices.
The 3945 is an ABG/BG device, with no support for 802.11n. The 4965 is a 2x3
ABGN device.
Signed-off-by: Meenakshi Venkataraman <meenakshi.venkataraman@intel.com>
Acked-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
For non-combo devices, 2-wire BT coex is needed to make sure BT coex
still function with external BT devices
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
During uCode loading, if the reply_alive come back with "failure",
try to load the same uCode again.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
If device has serious problem and cause firmware can not recover itself.
Keep reloading firmware will not help, it can only fill up the syslog and
lock up the system because busy reloading.
Introduce the limit reload counter, if the reload reach the maximum within
the pre-defined duration;stop the reload operation.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Fixes this build warning:
drivers/net/wireless/iwlwifi/iwl-3945.c:411:13: warning: 'iwl3945_good_plcp_health' defined but not used
As per Johannes Berg.
Signed-off-by: David S. Miller <davem@davemloft.net>
Combo devices have TX statistics on different place, because
struct statistics_rx_bt and struct statistics_rx have different
size. User proper values on combo devices instead of random data.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Make ack health code easies to read. Compared to previous
code, we do not print debug messages when expected_ack_cnt_delta == 0
and also do check against negative deltas.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
No functional change, make recover from statistics code
easies to read.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Patch fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=654599
Many users report very low speed problem on 3945 devices,
this patch fixes problem, but only for some of them.
For unknown reason, sometimes after hw scanning, device is not able
to receive frames at high rate. Since plcp health check may request
hw scan to "reset radio", performance problem start to be observable
after update kernel to .35, where plcp check was introduced.
Bug reporter confirmed that removing plcp check fixed problem for him.
Reported-and-tested-by: SilvioTO <silviotoya@yahoo.it>
Cc: stable@kernel.org # 2.6.35+
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
With commit 554d1d027b only one RF_KILL
interrupt will be seen by the driver when the interface is down.
Re-enable the interrupt when it occurs to see all transitions.
Signed-off-by: Don Fry <donald.h.fry@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This code, and the places that set the variable
is_internal_short_scan and the vif pointers are
all protected by the mutex, there's no point in
locking the spinlock here as well (any more).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
6250 2x2 devices have 2 tx chain and 2 rx chain. For some reason,
the EEPROM contain incorrect information and indicate it only has single
tx chain. overwrite it with .cfg parameter to make sure both chain 'A' and
chain 'B' can be used for transmit and receive
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
