When connected to an AP, the PHY will typically be tuned to
a higher bandwidth than the beacons are transmitted on, as
they are normally only transmitted on 20 MHz. This can mean
that another STA is simultaneously transmitting on another
channel of the higher bandwidth, and apparently this energy
may be taken into account by the PHY, resulting in elevated
energy readings.
To work around this, track the firmware's corrected beacon
energy data and replace the RSSI in beacons by that. The
replacement happens for all beacons received in the context
of the current MAC or link (depending on FW version), in
which case the filters will drop all else. For a scan, which
is only tuning to 20 MHz channels, the MAC/link ID will be
one that isn't found (the AUX ID 4), and no correction will
be done (nor is it needed.)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250711183056.324bfe7027ff.I160f947e7aab30e0110a7019ed46186e57c3de14@changeid
Due to the firmware allocating the BAID, we can only install
the data structure after the BAID is valid from the firmware's
point of view. As a result, the firmware can start sending
frame release notifications to the driver immediately. This
isn't supposed to happen by protocol, since the peer STA is
not expected to use the blockack session until the AddBA has
a response. However, firmware doesn't know that, our RX path
can't know when it was, so simply don't WARN in this case but
only have a debug message.
Since the BAID comes from firmware, also use IWL_FW_CHECK()
instead of a warning for the validity check.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20241227095718.4360f2b9e185.I447f9a5fc6dfdc78ec238200338e2da040ee7e61@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Kalle Valo says:
====================
wireless-next patches for v6.11
The first "new features" pull request for v6.11 with changes both in
stack and in drivers. Nothing out of ordinary, except that we have
two conflicts this time:
net/mac80211/cfg.c
https://lore.kernel.org/all/20240531124415.05b25e7a@canb.auug.org.au
drivers/net/wireless/microchip/wilc1000/netdev.c
https://lore.kernel.org/all/20240603110023.23572803@canb.auug.org.au
Major changes:
cfg80211/mac80211
* parse Transmit Power Envelope (TPE) data in mac80211 instead of in drivers
wilc1000
* read MAC address during probe to make it visible to user space
iwlwifi
* bump FW API to 91 for BZ/SC devices
* report 64-bit radiotap timestamp
* enable P2P low latency by default
* handle Transmit Power Envelope (TPE) advertised by AP
* start using guard()
rtlwifi
* RTL8192DU support
ath12k
* remove unsupported tx monitor handling
* channel 2 in 6 GHz band support
* Spatial Multiplexing Power Save (SMPS) in 6 GHz band support
* multiple BSSID (MBSSID) and Enhanced Multi-BSSID Advertisements (EMA)
support
* dynamic VLAN support
* add panic handler for resetting the firmware state
ath10k
* add qcom,no-msa-ready-indicator Device Tree property
* LED support for various chipsets
* tag 'wireless-next-2024-06-07' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next: (194 commits)
wifi: ath12k: add hw_link_id in ath12k_pdev
wifi: ath12k: add panic handler
wifi: rtw89: chan: Use swap() in rtw89_swap_sub_entity()
wifi: brcm80211: remove unused structs
wifi: brcm80211: use sizeof(*pointer) instead of sizeof(type)
wifi: ath12k: do not process consecutive RDDM event
dt-bindings: net: wireless: ath11k: Drop "qcom,ipq8074-wcss-pil" from example
wifi: ath12k: fix memory leak in ath12k_dp_rx_peer_frag_setup()
wifi: rtlwifi: handle return value of usb init TX/RX
wifi: rtlwifi: Enable the new rtl8192du driver
wifi: rtlwifi: Add rtl8192du/sw.c
wifi: rtlwifi: Constify rtl_hal_cfg.{ops,usb_interface_cfg} and rtl_priv.cfg
wifi: rtlwifi: Add rtl8192du/dm.{c,h}
wifi: rtlwifi: Add rtl8192du/fw.{c,h} and rtl8192du/led.{c,h}
wifi: rtlwifi: Add rtl8192du/rf.{c,h}
wifi: rtlwifi: Add rtl8192du/trx.{c,h}
wifi: rtlwifi: Add rtl8192du/phy.{c,h}
wifi: rtlwifi: Add rtl8192du/hw.{c,h}
wifi: rtlwifi: Add new members to struct rtl_priv for RTL8192DU
wifi: rtlwifi: Add rtl8192du/table.{c,h}
...
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
====================
Link: https://lore.kernel.org/r/20240607093517.41394C2BBFC@smtp.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
There's a conflict already and some upcoming changes
also depend on changes in wireless for being conflict-
free, so pull wireless in to make all that easier.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
A DoS tool that injects loads of authentication frames made our AP
crash. The iwl_mvm_is_dup() function couldn't find the per-queue
dup_data which was not allocated.
The root cause for that is that we ran out of stations in the firmware
and we didn't really add the station to the firmware, yet we didn't
return an error to mac80211.
Mac80211 was thinking that we have the station and because of that,
sta_info::uploaded was set to 1. This allowed
ieee80211_find_sta_by_ifaddr() to return a valid station object, but
that ieee80211_sta didn't have any iwl_mvm_sta object initialized and
that caused the crash mentioned earlier when we got Rx on that station.
Cc: stable@vger.kernel.org
Fixes: 57974a55d9 ("wifi: iwlwifi: mvm: refactor iwl_mvm_mac_sta_state_common()")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240206175739.1f76c44b2486.I6a00955e2842f15f0a089db2f834adb9d10fbe35@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The firmware / hardware of devices supporting RSS is able to report
duplicates and packets that time out inside the reoder buffer. We can
now remove all the complex logic that was implemented to keep all the Rx
queues more the less synchronized: we used to send a message to all the
queues through the firmware to teach the different queues about what is
the current SSN every 2048 packets.
Now that we rely on the firmware / hardware to detect duplicates, we can
completely remove the code that did that in the driver and it has been
reported that this code was spuriously dropping legit packets.
Suggested-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20231017115047.54cf4d3d5956.Ic06a08c9fb1e1ec315a4b49d632b78b8474dab79@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Multi rx queue allows to spread the load of the Rx streams on different
CPUs. 9000 series required complex synchronization mechanisms from the
driver side since the hardware / firmware is not able to provide
information about duplicate packets and timeouts inside the reordering
buffer.
Users have complained that for newer devices, all those synchronization
mechanisms have caused spurious packet drops. Those packet drops
disappeared if we simplify the code, but unfortunately, we can't have
RSS enabled on 9000 series without this complex code.
Remove support for RSS on 9000 so that we can make the code much simpler
for newer devices and fix the bugs for them.
The down side of this patch is a that all the Rx path will be routed to
a single CPU, but this has never been an issue, the modern CPUs are just
fast enough to cope with all the traffic.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20231017115047.2917eb8b7af9.Iddd7dcf335387ba46fcbbb6067ef4ff9cd3755a7@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The firmware was trying to report the B2 RU allocation in
the place previously used here as well, but there's a HW
block that clears the lower 8 bits in this metadata word
even in sniffer mode. Thus, firmware moved B2 to another
place, follow that.
There's no need to detect the version since moving it to
the other place if firmware didn't just means that we'll
continue to report the (erroneous) zero value, and it's
not really something we can detect from the firmware now.
While debugging this we realized that the comments about
placement in the metadata dwords are wrong, update them.
Reported-by: Youhan Kim <youhank@qti.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230830112059.dec7f1e07ff8.I623fee2d710cc7b6f392d65b708883ed58632b45@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
There are a number of upcoming things in both the stack and
drivers that would otherwise conflict, so merge wireless to
wireless-next to be able to avoid those conflicts.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When CSME is connected and has link protection set, the driver must
connect to the same AP CSME is connected to.
When in link protection, modify scan request parameters to include
only the channel of the AP CSME is connected to and scan for the
same SSID. In addition, filter the scan results to include only
results from the same AP. This will make sure the driver will connect
to the same AP and will do it fast enough to keep the session alive.
Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230418122405.c1b55de3d704.I3895eebe18b3b672607695c887d728e113fc85ec@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The RADA/firmware collaborate on MIC stripping in the following
way:
- the firmware fills the IWL_RX_MPDU_MFLG1_MIC_CRC_LEN_MASK
value for how many words need to be removed at the end of
the frame, CRC and, if decryption was done, MIC
- if the RADA is active, it will
- remove that much from the end of the frame
- zero the value in IWL_RX_MPDU_MFLG1_MIC_CRC_LEN_MASK
As a consequence, the only thing the driver should need to do
is to
- unconditionally tell mac80211 that the MIC was removed
if decryption was already done
- remove as much as IWL_RX_MPDU_MFLG1_MIC_CRC_LEN_MASK says
at the end of the frame, since either RADA did it and then
the value is 0, or RADA was disabled and then the value is
whatever should be removed to strip both CRC & MIC
However, all this code was historically grown and getting a
bit confused. Originally, we were indicating that the MIC was
not stripped, which is the version of the code upstreamed in
commit 780e87c29e ("iwlwifi: mvm: add 9000 series RX processing")
which indicated RX_FLAG_DECRYPTED in iwl_mvm_rx_crypto().
We later had a commit to change that to also indicate that the
MIC was stripped, adding RX_FLAG_MIC_STRIPPED. However, this was
then "fixed" later to only do that conditionally on RADA being
enabled, since otherwise RADA didn't strip the MIC bytes yet.
At the time, we were also always including the FCS if the RADA
was not enabled, so that was still broken wrt. the FCS if the
RADA isn't enabled - but that's a pretty rare case. Notably
though, it does happen for management frames, where we do need
to remove the MIC and CRC but the RADA is disabled.
Later, in commit 40a0b38d7a ("iwlwifi: mvm: Fix calculation of
frame length"), we changed this again, upstream this was just a
single commit, but internally it was split into first the correct
commit and then an additional fix that reduced the number of bytes
that are removed by crypt_len. Note that this is clearly wrong
since crypt_len indicates the length of the PN header (always 8),
not the length of the MIC (8 or 16 depending on algorithm).
However, this additional fix mostly canceled the other bugs,
apart from the confusion about the size of the MIC.
To fix this correctly, remove all those additional workarounds.
We really should always indicate to mac80211 the MIC was stripped
(it cannot use it anyway if decryption was already done), and also
always actually remove it and the CRC regardless of the RADA being
enabled or not. That's simple though, the value indicated in the
metadata is zeroed by the RADA if it's enabled and used the value,
so there's no need to check if it's enabled or not.
Notably then, this fixes the MIC size confusion, letting us receive
GCMP-256 encrypted management frames correctly that would otherwise
be reported to mac80211 8 bytes too short since the RADA is turned
off for them, crypt_len is 8, but the MIC size is 16, so when we do
the adjustment based on IWL_RX_MPDU_MFLG1_MIC_CRC_LEN_MASK (which
indicates 20 bytes to remove) we remove 12 bytes but indicate then
to mac80211 the MIC is still present, so mac80211 again removes the
MIC of 16 bytes, for an overall removal of 28 rather than 20 bytes.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230418122405.81345b6ab0cd.Ibe0348defb6cce11c99929a1f049e60b5cfc150c@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
