Currently, when one interface switches HT mode,
all others will follow along. This is clearly
undesirable, since the new one might switch to
no-HT while another one is operating in HT.
Address this issue by keeping track of the HT
mode per interface, and allowing only changes
that are compatible, i.e. switching into HT40+
is not possible when another interface is in
HT40-, in that case the second one needs to
fall back to HT20.
Also, to allow drivers to know what's going on,
store the per-interface HT mode (channel type)
in the virtual interface's bss_conf.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Currently (all tested with hwsim) you can do stupid
things like setting up an AP on a certain channel,
then adding another virtual interface and making
that associate on another channel -- this will make
the beaconing to move channel but obviously without
the necessary IEs data update.
In order to improve this situation, first make the
configuration APIs (cfg80211 and nl80211) aware of
multi-channel operation -- we'll eventually need
that in the future anyway. There's one userland API
change and one API addition. The API change is that
now SET_WIPHY must be called with virtual interface
index rather than only wiphy index in order to take
effect for that interface -- luckily all current
users (hostapd) do that. For monitor interfaces, the
old setting is preserved, but monitors are always
slaved to other devices anyway so no guarantees.
The second userland API change is the introduction
of a per virtual interface SET_CHANNEL command, that
hostapd should use going forward to make it easier
to understand what's going on (it can automatically
detect a kernel with this command).
Other than mac80211, no existing cfg80211 drivers
are affected by this change because they only allow
a single virtual interface.
mac80211, however, now needs to be aware that the
channel settings are per interface now, and needs
to disallow (for now) real multi-channel operation,
which is another important part of this patch.
One of the immediate benefits is that you can now
start hostapd to operate on a hardware that already
has a connection on another virtual interface, as
long as you specify the same channel.
Note that two things are left unhandled (this is an
improvement -- not a complete fix):
* different HT/no-HT modes
currently you could start an HT AP and then
connect to a non-HT network on the same channel
which would configure the hardware for no HT;
that can be fixed fairly easily
* CSA
An AP we're connected to on a virtual interface
might indicate switching channels, and in that
case we would follow it, regardless of how many
other interfaces are operating; this requires
more effort to fix but is pretty rare after all
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
When reconfiguring an interface due to a previous
hardware restart, mac80211 will currently include
the new IBSS flag on non-IBSS interfaces which may
confuse drivers.
Instead of doing the ~0 trick, simply spell out
which things are going to be reconfigured.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
... so orinoco_usb can share some common functionality.
Handle 802.2 encapsulation and MIC calculation in that function.
The 802.3 header is prepended to the SKB. The calculated MIC is written
to a specified buffer. Also modify the transmit control word that will
be passed onto the hardware to specify whether the MIC is present, and
the key used.
Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Atheros hardware supports receiving frames that span multiple
descriptors and buffers. In this case, the rx status of every
descriptor except for the last one is invalid and may contain random
data. Because the driver does not support this, it needs to drop such
frames.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This patch removes the incomplete AMPDU implementation in ar9170usb.
The code in question is:
* too big and complex (more than 550 SLOC.)
This is enough to qualify for a new separate code file!
* unbalanced quantity & quality
over-engineered areas like:
* xmit scheduling and queuing frames for multiple HT peers
* redundant frame sorting
are confronted by gaping holes:
* accurate transmission feedback
* firmware error-handling and device reset
* HT rate control algorithm
* error-prone
Since its inclusion, hardly anything was done to fix
any of the outlined flaws from the initial commit message.
=> This also indicates poor maintainability.
* relies heavily on several spinlocks.
As a result of this shortcomings, the code is slow and does not
even support the most basic 11n requirement: HT station mode.
Therefore, I request to purge my heap of **** from the kernel:
"ar9170: implement transmit aggregation".
The next item on the agenda is: (re-)start from scratch with
an adequate design to accommodate the special requirements
and features of the available frameworks and tools.
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
"mac80211: improve IBSS scanning" was missing a hunk.
This adds that hunk as originally intended.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
And use it consistently in the chipset drivers.
Preparation for further clean ups.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Inspection of the Ralink vendor driver shows that the TX_BAND_CFG register
and BBP register 3 are about HT40- indication, not about HT40+ indication.
Inverse the meaning of these fields in the code.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Now that RT30xx support is at the same level as RT28xx support we can enable
these devices by default.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
PCI specific code has been remove quite some time ago.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
We currently have this check as a BUG_ON, which is being hit by people.
Previously it was an error with a recalculation if not current, return that
code.
The BUG_ON was introduced by:
commit 3110bef78c
Author: Guy Cohen <guy.cohen@intel.com>
Date: Tue Sep 9 10:54:54 2008 +0800
iwlwifi: Added support for 3 antennas
... the portion adding the BUG_ON is reverted since we are encountering the error
and BUG_ON was created with assumption that error is not encountered.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Looks like we missed removing the return statement in the non-CONFIG_IWM_DEBUG
dummy implementation of iwm_debugfs_init...
Signed-off-by: John W. Linville <linville@tuxdriver.com>
0x07d1,0x3c17 D-Link Wireless N 150 USB Adapter DWA-125
0x1b75,0x3071 Ovislink Airlive WN-301USB
0x1d4d,0x0011 Pegatron Ralink RT3072 802.11b/g/n Wireless Lan USB Device
0x083a,0xf511 Arcadyan 802.11 USB Wireless LAN Card
0x13d3,0x3322 AzureWave 802.11 n/g/b USB Wireless LAN Card
Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Currently, hwsim will always detect a double scan
after the first one has finished ...
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
When IBSS is fixed to a frequency, it can still
scan to try to find the right BSSID. This makes
sense if the BSSID isn't also fixed, but it need
not scan all channels -- just one is sufficient.
Make it do that by moving the scan setup code to
ieee80211_request_internal_scan() and include
a channel variable setting.
Note that this can be further improved to start
the IBSS right away if both frequency and BSSID
are fixed.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This allows enabling TX and disabling both TX and
RX aggregation sessions manually in debugfs. It is
very useful for debugging session initiation and
teardown problems since with this you don't have
to force a lot of traffic to get aggregation and
thus have less data to analyse.
Also, to debug mac80211 code itself, make hwsim
"support" aggregation sessions. It will still just
transfer the frame, but go through the setup and
teardown handshakes.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This involves some refactorring of the common fw download code to
substitute ezusb versions of various functions.
Note that WPA-enabled firmwares (9.xx series) will not work fully with
orinoco_usb yet.
Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
We expect to be either in process contect or soft interrupt context. So
use in_softirq instead.
Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This driver uses the core orinoco modules for the bulk of
the functionality. The low level hermes routines (for local bus
cards) are replaced, the driver supplies its own ndo_xmit_start
function, and locking is done with the _bh variant.
Some recent functionality is not available to the USB cards yet
(firmware loading and WPA).
Out-of-tree driver originally written by Manuel Estrada Sainz.
Thanks to Mark Davis for supplying hardware to test the updates.
Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Local bus and USB drivers will need to do locking differently.
The original orinoco_usb patches had a boolean variable controlling
whether spin_lock_bh was used, or irq based locking. This version
provides wrappers for the lock functions and the drivers specify the
functions pointers needed.
This will introduce a performance penalty, but I'm not expecting it to
be noticable.
Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Allow the main drivers to specify a custom version of the net_device_ops
structure. This is required by orinoco_usb to supply a separate transmit
function.
Export existing net_device_ops callbacks so that the drivers can reuse
some of the existing code.
Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Pave the way for introducing USB alternative functions.
Force callers to dereference ops instead of providing wrappers.
Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Both of these functions can currently return
a station pointer that, to the driver, is
invalid (in IBSS mode only) because adding
the station failed. Check for that, and also
make ieee80211_find_sta() properly use the
per interface station search.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
"iwl: cleanup: remove unneeded error handling" missed the one in
if_sdio_debugfs_init().
I don't think we even need to check -ENODEV ourselves because if
DEBUG_FS is not compiled in, all the debugfs utility functions will
become no-op.
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Acked-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Greenfield is a 11n feature, remove it from non-11n devices
configuration parameters list
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Separate the hw_set_hw_params() function to per device based; different
devices can have different hardware parameters set, when separate the
function based on device type can avoid mistakes, give more flexibilities and
easier to read.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
The TX status code is currently abusing the ampdu_ack_map field (a bitmap) to
count the number of successfully received frames. The comments in mac80211.h
show there are actually three different, relevant variables, of which we are
currently using two, both incorrectly. Fix this by making
- ampdu_ack_len -> the number of ACKed frames (i.e. successes)
- ampdu_ack_map -> the bitmap
- ampdu_len -> the total number of frames sent (i.e., attempts)
to match the header file (and verified with ath9k's usage) and updating Intel's
RS code to match.
Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Add general, rx and tx uCode statistics to 3945. This will help
in debugging
Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
When starting an aggregation session, the swq_id is generated in function
iwl_virtual_agg_queue_num() where the first parameter is supposed to be
the Access Class, but it used the tx fifo ID instead. This means the AC
value stored in swq_id is incorrect. To test this, look at the tx_queue
file in debugfs while transmitting Best Effort flow (ac=2), it shows:
hwq 10: read=0 write=0 stop=0 swq_id=0xa9 (ac 1/hwq 10)
After this fix, it will show:
hwq 10: read=0 write=0 stop=0 swq_id=0xaa (ac 2/hwq 10)
Signed-off-by: Shanyu Zhao <shanyu.zhao@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
We removed resetting of PCI_RETRY_TIMEOUT register
in merge of suspend resume work.
'Suspend and resume' resets the PCI configuration space, so we
have to disable the RETRY_TIMEOUT register again here.
Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
IEEE80211_CONF_SHORT_SLOT_TIME is no longer a possible setting in
ieee80211_conf->flags
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
The low level transmission function is performed at uCode layer
for all the "agn" NICs, there is no statistics information available
for mac80211 get_stats() call. Remove the callback function to
avoid misleading information that returned success when indeed it is not
supported. Now return "not supported".
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Patch "iwlwifi: work around passive scan issue" was merged into
wireless-2.6, but touched a lot of code since modified (and moved)
in wireless-next-2.6. This caused some conflicts.
Conflicts:
drivers/net/wireless/iwlwifi/iwl-scan.c
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Some firmware versions don't behave properly when
passive scanning is requested on radar channels
without enabling active scanning on receiving a
good frame. Work around that issue by asking the
firmware to only enable the active scanning after
receiving a huge number of good frames, a number
that can never be reached during our dwell time.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
My previous patch "mac80211: notify driver about
IBSS status" left a problem -- when we merge with
a new BSSID, we never tell the driver that we left
the old one. Fix that.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
When reporting Tx status, indicate that only one rate was used.
Otherwise, the rate is frozen at rate index 0 (i.e. 1Mb/s).
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Cc: stable@kernel.org
Some drivers (e.g. iwlwifi) need to know and try
to figure it out based on other things, but making
it explicit is definitely better.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
If AP do not provide us supported rates before assiociation, send
all rates we are supporting instead of empty information element.
v1 -> v2: Add comment.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Use old supported rates, if AP do not provide supported rates
information element in a new managment frame.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This is just a cleanup and doesn't change how the code works.
debugfs_create_dir() and debugfs_create_file() return an error pointer
(-ENODEV) if CONFIG_DEBUG_FS is not enabled, otherwise if an error occurs
they return NULL. This is how they are implemented and what it says in
the DebugFS documentation. DebugFS can not be compiled as a module.
As a result, we only need to check for error pointers and particularly
-ENODEV one time to know that DebugFS is enabled. This patch keeps the
first check for error pointers and removes the rest.
The other reason for this patch, is that it silences some Smatch warnings.
Smatch sees the condition "(result != -ENODEV)" and assumes that it's
possible for "result" to equal -ENODEV. If it were possible it would lead
to an error pointer dereference. But since it's not, we can just remove
the check.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Update the rfcsr and bbp init code for SoC devices to match with the
latest Ralink driver.
To have better control over which values are used for the register
initialization create a new function rt2800_is_305x_soc which checks
for SoC interface type, the correct RT chipset and the correct RF
chipset. This is based on the assumption that all rt305x SoC devices
use a rt2872 and rf3020/rf3021/rf3022.
In case an unknown RF chipset is found on a SoC device with a rt2872
don't treat it as rt305x and just print a message.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Johannes Berg