Start the new BT Coex implementation.
Don't react to notifications for now - only the initial
configuration is implemented. The rest will happen in next
patches.
Since coex.c now uses the new the new structures in all
functions, we need to adapt the code to compile, even if it
doesn't run yet.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

A new API is coming. This new API is not backward
compatible. So we need to keep the old commands to be able
to work with the former API.
Move all the current code into a new file: coex_legacy.
If a firmware with the new API is detected, we currently
just bail out since the implementation of the new API will
come in future patches.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

If BT is active, we need to refrain from using the shared
antenna. This logic is done in the firmware when we use the
link quality tables. But for management frames, the rate is
written in the Tx command by the driver.
Hence the driver needs to make sure not use the shared
antenna when BT is active for any frames that don't use
the rate scale table such as management frames or multicast.
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

This really belongs to the constants file.
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

When the firmware enables TxTxCorunning, we can lift the
constaints on the rate control.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

We can Tx in MIMO rates when we are in TxTx Disallow mode
just like we can when we are in Tight mode.
Same if we are in 5Ghz regardless of the mode we are.
Change the code to allow MIMO in these cases.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

This can be used for testing.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

This was not used is unlikely to be used, just kill it.
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

I forgot to disable the reduced Tx power in a few paths.
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

The firmware needs to know on what channel we run before we
set the association bit in the MAC context. Change a bit the
flow to achieve this.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

These values are used to give preference to WiFi according
to a certain pattern.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

CMD_SYNC is really 0 which is confusing:

if (cmd.flags & CMD_SYNC) is always false.
Fix this by simply removing its definition.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

All messages should have a trailing newline, add all the
missing ones. Also make all messages constants, replacing
the single one that pointlessly used a variable.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

The commit below introduced a bug in the validity bits in
init. Due to that, all the Coex mechanism stopped sending
kills to the BT side. Fix that.

Fixes: b9fae2d5 ("iwlwifi: mvm: BT Coex add support for Co-running block")
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

Calling iwl_send_bt_init_conf for INIT firmware is not a
problem, and calling iwl_send_bt_prio_tbl from
iwl_send_bt_init_conf allows us to prepare for new API.
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

The BT Coex API underwent a minor backward compatible API
change.
We now need to set an invalid value in the override fields.
While at it, add kerneldoc comments on the fields in the
command.
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

This is really not needed. This is a remainder from a C99
initialiser.
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

All the supported firmwares have this flag set.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

A few entries were wrong and this caused throughput issues.

Cc: <stable@vger.kernel.org> [3.13+]
Fixes: dac94da8 ("iwlwifi: mvm: new BT Coex API")
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

Implement Adaptive Tx Power Control algorithm.

ATPC basically tries to decrease the tx power
as much as possible while the throughput is
not being hurt.
Signed-off-by: NEliad Peller <eliadx.peller@intel.com>
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

I forgot to send the new Look Up Table to the firmware and
I also forgot to free the command which is kzalloc'ed.
This code is relevant for 7265 device only.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

In order to debug the firmware, we need to be able to set
the BT priority of WiFi packets. This priority is set based
on the type of the packet (control frames, EAPOL etc...).
For debugging purposes, allow to override this priority by
a debugfs controlled value.
Enable this feature that needs this priority to be able to
test it.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

We can now define the priority against BT per AC. This is
possible with a newer firmware that allows to define the
priority with 2 bits.
Note that this change is compatible with older firmware
since older firmware will simply ignore the new bit (11),
and we still set the old bit (12) in the same cases as
before.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

This code is really related to BT Coex - move it to the coex
file.
Also - prepare for a FW API change that will happen soon:
Bits 11 and 12 will be allocated for BT priority. Today, we
only have bit 12.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

Make bt-coex generic to allow other coex mechanisms.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

7265 features a new calibration which is called antenna
coupling. The purpose of this calibration (which isn't
really a calibration), is to measure the isolation between
the antennas and that can give us useful information for
the Coex modules.

With this information, we can tune the LookUpTables (LUTs)
that define the BT / WiFi contention policy.

The LUTs currently contain dummy values - but they will be
updated soon.

While at it, change the current code to stop duplicate the
host command while sending. This was needed back then, when
the command was short enough to be allocated on the stack.
Since then, the command grew a lot and is now allocated on
the heap - hence we can use the NOCOPY option instead.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

Since the statistics handler is asynchrous, it can very well
be that we will handle the statistics (hence the RSSI
fluctuation) when we already disassociated.
Don't WARN on this case.

This solves: https://bugzilla.redhat.com/show_bug.cgi?id=1071998

Cc: <stable@vger.kernel.org> [3.10+]
Fixes: 2b76ef13 ("iwlwifi: mvm: implement reduced Tx power")
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

The Sync to SCO is a feature that allows to synchronize
between the WiFi traffic and the expectable BT traffic
when SCO profile is active.
We need to set the validity bit in the command in the init
flow, and set / clear the enablement bit if we want to
enabled / disable the feature.

While at it, clean up the flags that are not used in the
API.

This feature needs to be enabled / disabled easily, so
export its enablement to constants.h.
Reviewed-by: NEyal Zolotov <eyal.zolotov@intel.com>
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

This will be useful during tests done on the physical layer.
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

Based on the Bluetooth activity grading, we can stop using
the shared antenna and ask the stations to honor the new
SMPS state.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

If a vif is in low latency mode, it should be in primary
channel.
Also tell BT Coex about the change when a vif enters or
exits low latency mode.
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

We somtimes need to fetch the iwl_mvm_sta structure from a
station index - provide a helper to do that.
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

Happy new year!
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

This channel inhibition for channel 14 was wrong. Fix it.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

Sync to SCO is a feature that allows to synchronise the
wifi activity with the predictable BT activity in
SCO profile. This allows to reduce the collisions and
improve overall quality.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

This is just a helper function to go from the mac80211
station struct to our internal one, to later allow us
to avoid temporary 'mvmsta' variables.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

Latest tests have shown that when BT is active and has
connections but the traffic is low, the WiFi aggregation can
be large up to 4000us without noticeable impact on BT.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

This patch is very similar to a previous fix: 22cba0c0

When we disassociate, mac80211 removes the station and
then, it sets the bss it unsets the assoc bool in bss_info.

Since the firwmware wants it the opposite (first set the
MAC context as unassoc, and only then, remove the STA of
the API), we have a small period of time in which the STA
in firmware doesn't have a valid ieee80211_sta pointer.
During that time, iwl_mvm_vif->ap_sta_id, is still set
to the STA in firmware that represent the AP.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

This feature isn't supported by the firmware (yet).
Note that settingt he values to BT_CFG_CMD is harmless if
the validity bit is clear - so keep the configuration
values in BT_CFG_CMD, but clear the validity bit until thes
feature is enabled in the firmware.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

Putting the context id of the primary phy context in
the placeholder of the secondary is obviously a bad
idea.
Spotted by smatch.

Fixes: dac94da8 ("iwlwifi: mvm: new BT Coex API")
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>