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Use the rs_pretty_print_rate() function to print the rate_n_flags in
more human-readable format.
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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mac80211 limits amsdu size to the minimum of HT and VHT capabilities
but since in a VHT connection we don't transmit HT frames we can discard
HT limits.
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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Add a pointer to the iwl_trans structure and point it to the trans
part of the cfg. This is the first step in disassociating the trans
configuration from the rest of the configuration.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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In order to be able to select the cfg depending on the HW revision or
on the RF ID, we need to set up the trans before selecting the cfg.
To do so, move the elements from cfg that are needed by
iwl_trans_alloc() to a separate struct at the top of the cfg, so it
can be used by other cfg types as well, before selecting the rest of
the configuration.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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The check is not necessary anymore, because now the struct is not
allocated separately, but is part of the mvmsta struct. Remove the
check, since it's dead code.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Just minor overlapping changes in the conflicts here.
Signed-off-by: David S. Miller <davem@davemloft.net>
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lq_info is an arary of size 2, active_tbl index is u8.
When accessing lq_info[1 - active_tbl], theoretically it's possible
that the access will be made to a negative index value.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The solution with the worker still had a bug, as in order
to get sta, rcu_read_lock should be used and thus no mutex
can be used inside iwl_mvm_rs_rate_init.
Also, spin_lock is a simpler solution, no need to spawn a
dedicated worker.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The only place where the command was sent as SYNC is during
init and this is not really critical. This change is required
for replacing RS mutex with a spinlock (in the subsequent patch),
since SYNC comamnd requres sleeping and thus the flow cannot
be done when holding a spinlock.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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iwl_mvm_rs_tx_status can be called from two places in the code, but the
mutex is taken only on one of the calls. Split it into a wrapper taking
locks and an internal __iwl_mvm_rs_tx_status function.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Rate perform uses the lq_sta table to calculate the next rate to scale
while rate init resets the same table,
Rate perform is done in soft irq context in parallel to rate init
that can be called in case we are doing changes like AP changes BW
or moving state for auth to assoc.
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The .remove_sta_debugfs callback was not doing anything in this driver,
so remove it as it is not needed.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20190612142658.12792-4-gregkh@linuxfoundation.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Honestly all the conflicts were simple overlapping changes,
nothing really interesting to report.
Signed-off-by: David S. Miller <davem@davemloft.net>
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There's no rate control algorithm that *doesn't* want to call
it internally, and calling it internally will let us modify
its behaviour in the future.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of version 2 of the gnu general public license as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details the full gnu general public license is included in
this distribution in the file called license
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 29 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000435.438503728@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: linux-wireless@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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For non-offloaded rate control, implement VHT extended NSS
support by just ignoring 160 MHz on transmit if the peer
doesn't support the full NSS (2). This is pretty unlikely
and gets us 160 MHz RX as well as TX in most cases, since
the typical case for this workaround is 4x4 AP only doing
2x2 on 160 MHz.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Typically, when not in HE mode, we will not perform well
with AMSDUs bigger than 8K.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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We erroneously had some values for NGI in the table we give as an
example in rs_fill_rates_for_column(), when they should be SGI.
Change them so that they match what we say.
Reported-by: Rémy Grünblatt <remy@grunblatt.org>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Support getting mac80211 building AMSDUs for us. Remove GSO
support from mvm - we don't need it anymore.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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The rs_rate_from_ucode_rate() function may return -EINVAL if the rate
is invalid, but none of the callsites check for the error, potentially
making us access arrays with index IWL_RATE_INVALID, which is larger
than the arrays, causing an out-of-bounds access. This will trigger
KASAN warnings, such as the one reported in the bugzilla issue
mentioned below.
This fixes https://bugzilla.kernel.org/show_bug.cgi?id=200659
Cc: stable@vger.kernel.org
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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The new coex schema requires setting the non-shared antenna
for the single_stream_ant_msk field in the TLC command.
Signed-off-by: Erel Geron <erelx.geron@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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As with the non-offloaded rs case, during assoc on the ap side the phy
context is set to 20MHz until authorization of a client that supports
wider channel-widths. Support this by sending the initial
tlc_config_cmd with max supported channel width of 20MHz until
authorization succeeds.
Fixes: 6b7a5aea71b3 ("iwlwifi: mvm: always init rs with 20mhz bandwidth rates")
Signed-off-by: Naftali Goldstein <naftali.goldstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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The parameter that indicated whether the LQ command should be sent
as sync or async was removed, causing the LQ command to be sent as
sync from interrupt context (e.g. from the RX path). This resulted
in a kernel warning: "scheduling while atomic" and failing to send
the LQ command, which ultimately leads to a queue hang.
Fix it by adding back the required parameter to send the command as
sync only when it is allowed.
Fixes: d94c5a820d10 ("iwlwifi: mvm: open BA session only when sta is authorized")
Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Add support for the HE in the iwlwifi driver conforming with
P802.11ax_D2.0.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Currently, a BA session is opened when the tx traffic exceeds
10 frames per second. As a result of inter-op problems with some
APs, add a condition to open BA session only when station is
already authorized.
Fixes: 482e48440a0e ("iwlwifi: mvm: change open and close criteria of a BA session")
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Support the new APIs and activate AMSDU based on the
offloaded TLC decisions.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Prefer the direct use of octal for permissions.
Done with checkpatch -f --types=SYMBOLIC_PERMS --fix-inplace
and some typing.
Miscellanea:
o Whitespace neatening around these conversions.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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In AP mode, when a new station associates, rs is initialized immediately
upon association completion, before the phy context is updated with the
association parameters, so the sta bandwidth might be wider than the phy
context allows.
To avoid this issue, always initialize rs with 20mhz bandwidth rate, and
after authorization, when the phy context is already up-to-date, re-init
rs with the correct bw.
Signed-off-by: Naftali Goldstein <naftali.goldstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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This aligns the code with the existing pattern to check
if the firmware has a certain capability.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Replace sprintf by scnprintf throughout rs code.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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This patch adds rate scaling configuration command and
implements a few other handlers.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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This patch introduces a new instance of rate_control_ops for
the new API (adding only empty stubs here and the subsequent
patches in the series will fill in the implementation).
The decision which API to use is done during the register
step according to FW TLV.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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New devices will have rate scaling algorithm running in the firmware.
With this feature, the driver's responsiblity is to provide an initial
configuration and to handle notifications regarding recent rates and
some other parameters. Debugfs hooks will be still available for
reading the current rate/statistics and setting a fixed rate.
The old API is supported so far, though both APIs cannot be used
simultaneously.
This is the first patch in the series. It adds a new TLV specifying
FW support for the new API and updates lq_sta to support two types
of rate scaling.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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When we are in a search cycle, we try different combinations
of parameters. Those combinations are called 'columns'.
When we switch to a new column, we first need to check if
this column has a suitable rate, if not, we can't try it.
This means we must not erase the statistics we gathered
for the previous column until we are sure that we are
indeed switching column.
The code that tries to switch to a new column first sets
a whole bunch of things for the new column, and only then
checks that we can find suitable rates in that column.
While doing that, the code mistakenly erased the rate
statistics. This code was right until
struct iwl_scale_tbl_info grew up for TPC.
Fix this to make sure we don't erase the rate statistics
until we are sure that we can indeed switch to the new
column.
Note that this bug is really harmless since it causes a
change in the behavior only when we can't find any rate
in the new column which should really not happen. In the
case we do find a suitable we reset the rate statistics
a few lines later anyway.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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We don't plan to have products with 3 antennas in the near
future. All the rest of the code follows the same
assumption as well.
Remove the support for antenna C from rs_toggle_ant.
When trying to toggle from ANT_B, this avoids to go through
ANT_C, discover that it doesn't exist and continue to ANT_A.
In MIMO, this avoids to do ANT_AB -> ANT_BC -> ANT_AC and
back to ANT_AB.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Add a new state to enum iwl_mvm_agg_state, which is used between
queueing the work that starts tx aggregations and actually starting that
work (changing to state IWL_AGG_STARTING).
This solves a race where ieee80211_start_tx_ba_session is called a
second time, before the work queued by the first run has a chance to
change the agg_state. In this case the second call to
ieee80211_start_tx_ba_session returns an error, and the fallback is to
abort the ba session start.
Fixes: 482e48440a0e ("iwlwifi: mvm: change open and close criteria of a BA session")
Signed-off-by: Naftali Goldstein <naftali.goldstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Stephen Rothwell reported quite a few conflicts in iwlwifi between
wireless-drivers and wireless-drivers-next. To avoid any problems later in
other trees merge w-d to w-d-next to fix those conflicts early.
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Tx BA session should be started according to the current throughput
without any dependence on the internal rate scaling state. The criteria
for opening a BA session will be 10 frames per second.
Sending frequent del BAs can cause inter-op issues with some APs. We'll
not close a BA session until we receive an explicit del BA from the
peer.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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We use mvmsta for the sta->drv_priv in mvm, but in rs.c we have a
bunch of instances using sta_priv, which is probably due to it being
copied from dvm. Change all occurrences to mvmsta for consistency
with the rest of the driver
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Statistics should be collected according to the actual rate a
frame/aggregation was transmitted and not according to the initial rate
from the last LQ command (these rates are different if the frames were
retransmitted at a lower rate from the rate scale table).
This is needed to remove throughput degradation.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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A SCD bug was fixed in the A000 family, allowing to
support aggregations of 64 frames (rather than 63).
Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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In case that rate's antenna is wrong at the init stage, it's
very hard to say what went wrong. Add debug data to the already
existing WARN_ON_ONCE.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Up until now, the driver was comparing the rate reported by the FW and
the rate of the latest LQ command to avoid processing data belonging
to the old LQ command. Recently, FW changed the meaning of the initial
rate field in tx response and it holds the actual rate (which is not
necessarily the initial rate of LQ's rate table). Use instead LQ cmd
color to be able to filter out tx responses/BA notifications which
where sent during earlier LQ commands' time frame.
This fixes some throughput degradation in noisy environments.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Rates were changed to adapt to HE. Change is backward compatible.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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In https://bugzilla.kernel.org/show_bug.cgi?id=177341 Bob
reported a UBSAN WARNING on rs.c in iwldvm.
Fix the same bug in iwlmvm.
This because
i = index - 1;
for (mask = (1 << i); i >= 0; i--, mask >>= 1)
is unsafe: i could be negative and hence we can call <<
on a negative value.
This bug doesn't have any real impact since the condition
of the for loop will prevent any usage of mask.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=177341
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Handling of the number of space time streams was missing for HT rate in
rate printing function. Fix it.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Commit 5fc0f76c4 introduced Rx stats from debugfs, the function
iwl_mvm_reset_frame_stats from that commit defines and sets mcs but
does not use it. Compiling iwlwifi with W=1 gives this warning -
iwlwifi/mvm/rs.c: In function ‘iwl_mvm_update_frame_stats’:
iwlwifi/mvm/rs.c:3074:14: warning: variable ‘mcs’ set but not used [-Wunused-but-set-variable]
Fixes: 5fc0f76c43bd (iwlwifi: mvm: add Rx frames statistics via debugfs)
Signed-off-by: Kirtika Ruchandani <kirtika@google.com>
Cc: Eyal Shapira <eyal@wizery.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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mvmvif is defined and set in rs_mimo_allow but not used. Compiling
iwlwifi with W=1 gives the following warning, remove it. mvmsta is
used only to obtain mvmvif so remove it as well.
iwlwifi/mvm/rs.c: In function 'rs_mimo_allow':
iwlwifi/mvm/rs.c:165:22: warning: variable 'mvmvif' set but not used.[-Wunused-but-set-variable]
This fix removes calls to iwl_mvm_sta_from_mac &
iwl_mvm_vif_from_mac. They are both accessors, and do not have any
side-effects. Commit e621c2282e31 ("iwlwifi: rs: Remove workaround
that disables MIMO on P2P") removed a workaround that disabled MIMO on
P2P, 'mvmvif' was used for that workaround, but not removed with it.
Fixes: e621c2282e31 ("iwlwifi: rs: Remove workaround that disables MIMO on P2P")
Signed-off-by: Kirtika Ruchandani <kirtika@google.com>
Cc: Alexander Bondar <alexander.bondar@intel.com>
Cc: Emmanuel Grumbach <emmmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Expand TLC to support 160MHz channels. Full support for A-MSDU
case will be added separately.
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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