Allow to set world regulatory domain in case of user
request (iw reg set 00).
Signed-off-by: NJanusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

There's no need for the struct device_type with the uevent function
etc., just fill the country alpha2 when sending the event.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Introduce NL80211_RRF_AUTO_BW rule flag. If this flag set
maximum available bandwidth should be calculated base on
contiguous rules and wider channels will be allowed to cross
multiple contiguous/overlapping frequency ranges.

In case of old kernels maximum bandwidth from regulatory
rule will be used, while there is no NL80211_RRF_AUTO_BW flag.

This fixes the previous commit 97524820
("cfg80211: regulatory introduce maximum bandwidth calculation")
which was found to be a problem for userspace API compatibility.
Signed-off-by: NJanusz Dziedzic <janusz.dziedzic@tieto.com>
[edit commit log, use sizeof()]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In case we will get regulatory request with rule
where max_bandwidth_khz is set to 0 handle this
case as a special one.

If max_bandwidth_khz == 0 we should calculate maximum
available bandwidth base on all frequency contiguous rules.
In case we need auto calculation we just have to set:

country PL: DFS-ETSI
        (2402 - 2482 @ 40), (N/A, 20)
        (5170 - 5250 @ AUTO), (N/A, 20)
        (5250 - 5330 @ AUTO), (N/A, 20), DFS
        (5490 - 5710 @ 80), (N/A, 27), DFS

This mean we will calculate maximum bw for rules where
AUTO (N/A) were set, 160MHz (5330 - 5170) in example above.
So we will get:
        (5170 - 5250 @ 160), (N/A, 20)
        (5250 - 5330 @ 160), (N/A, 20), DFS

In other case:
country FR: DFS-ETSI
        (2402 - 2482 @ 40), (N/A, 20)
        (5170 - 5250 @ AUTO), (N/A, 20)
        (5250 - 5330 @ 80), (N/A, 20), DFS
        (5490 - 5710 @ 80), (N/A, 27), DFS

We will get 80MHz (5250 - 5170):
        (5170 - 5250 @ 80), (N/A, 20)
        (5250 - 5330 @ 80), (N/A, 20), DFS

Base on this calculations we will set correct channel
bandwidth flags (eg. IEEE80211_CHAN_NO_80MHZ).

We don't need any changes in CRDA or internal regulatory.
Signed-off-by: NJanusz Dziedzic <janusz.dziedzic@tieto.com>
[extend nl80211 description a bit, fix typo]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

For better use of CPU idle time, allow the scheduler to select the CPU
on which the timeout work of regulatory settings would be executed.
This extends CPU idle residency time and saves power.

This functionality is enabled when CONFIG_WQ_POWER_EFFICIENT is selected.

Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: NShaibal Dutta <shaibal.dutta@broadcom.com>
[zoran.markovic@linaro.org: Rebased to latest kernel. Added commit message.]
Signed-off-by: NZoran Markovic <zoran.markovic@linaro.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Add helper function that will return regdomain.
Follow the driver's regulatory domain, if present,
unless a country IE has been processed or a user
wants to help compliance further.
Signed-off-by: NJanusz Dziedzic <janusz.dziedzi@tieto.com>
[remove useless reg variable]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Instances of struct device_type are never modified, make them const.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Fix the following issues in reg_process_hint():

1. Add verification that wiphy is valid before processing
   NL80211_REGDOMAIN_SET_BY_COUNTRY_IE.
2. Free the request in case of invalid initiator.
3. Remove WARN_ON check on reg_request->alpha2 as it is not a
   pointer.
Signed-off-by: NIlan Peer <ilan.peer@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The REGULATORY_CUSTOM_REG can be used during early init with
the goal of overriding the wiphy's default regulatory settings
in case the alpha2 of the device is not known. In the case that
the alpha2 becomes known lets avoid having drivers having to
clear the REGULATORY_CUSTOM_REG flag by doing it for them
when regulatory_hint() is used.

Cc: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This can be used outside of the regulatory context for any checks
on the DFS region. The central cfg80211 dfs_region is always used
and if it does not match with the wiphy a debug print is issued.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This lets us later reuse the more generic reg_dfs_region_str().
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Only allow DFS to be set if the DFS regions agree.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

u8 was used in some other places, just stick to the enum,
this forces us to express the values that are expected.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Certain vendors may want to disable the processing of
country IEs so that they can continue using the regulatory
domain the driver or user has set.  Currently there is no
way to stop the core from processing country IEs, so add
support to the core to ignore country IE hints.

Cc: Mihir Shete <smihir@qti.qualcomm.com>
Cc: Henri Bahini <hbahini@qca.qualcomm.com>
Cc: Tushnim Bhattacharyya <tushnimb@qca.qualcomm.com>
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

802.11 cards may have different country IE parsing behavioural
preferences and vendors may want to support these. These preferences
were managed by the REGULATORY_CUSTOM_REG and the REGULATORY_STRICT_REG
flags and their combination. Instead of using this existing notation,
split out the country IE behavioural preferences as a new flag. This
will allow us to add more customizations easily and make the code more
maintainable.

Cc: Mihir Shete <smihir@qti.qualcomm.com>
Cc: Henri Bahini <hbahini@qca.qualcomm.com>
Cc: Tushnim Bhattacharyya <tushnimb@qca.qualcomm.com>
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
[fix up conflicts]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

We'll expand this later, this will make it easier to
classify and review what things are related to regulatory
or not.

Coccinelle only missed 4 hits, which I had to do manually,
supplying the SmPL in case of merge conflicts.

@@
struct wiphy *wiphy;
@@
-wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY
+wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG
@@
expression e;
@@
-e->flags |= WIPHY_FLAG_CUSTOM_REGULATORY
+e->regulatory_flags |= REGULATORY_CUSTOM_REG
@@
struct wiphy *wiphy;
@@
-wiphy->flags &= ~WIPHY_FLAG_CUSTOM_REGULATORY
+wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG
@@
struct wiphy *wiphy;
@@
-wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY
+wiphy->regulatory_flags & REGULATORY_CUSTOM_REG

@@
struct wiphy *wiphy;
@@
-wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY
+wiphy->regulatory_flags |= REGULATORY_STRICT_REG
@@
expression e;
@@
-e->flags |= WIPHY_FLAG_STRICT_REGULATORY
+e->regulatory_flags |= REGULATORY_STRICT_REG
@@
struct wiphy *wiphy;
@@
-wiphy->flags &= ~WIPHY_FLAG_STRICT_REGULATORY
+wiphy->regulatory_flags &= ~REGULATORY_STRICT_REG
@@
struct wiphy *wiphy;
@@
-wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY
+wiphy->regulatory_flags & REGULATORY_STRICT_REG

@@
struct wiphy *wiphy;
@@
-wiphy->flags |= WIPHY_FLAG_DISABLE_BEACON_HINTS
+wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS
@@
expression e;
@@
-e->flags |= WIPHY_FLAG_DISABLE_BEACON_HINTS
+e->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS
@@
struct wiphy *wiphy;
@@
-wiphy->flags &= ~WIPHY_FLAG_DISABLE_BEACON_HINTS
+wiphy->regulatory_flags &= ~REGULATORY_DISABLE_BEACON_HINTS
@@
struct wiphy *wiphy;
@@
-wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS
+wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS

Generated-by: Coccinelle SmPL
Cc: Julia Lawall <julia.lawall@lip6.fr>
Cc: Peter Senna Tschudin <peter.senna@gmail.com>
Cc: Mihir Shete <smihir@qti.qualcomm.com>
Cc: Henri Bahini <hbahini@qca.qualcomm.com>
Cc: Tushnim Bhattacharyya <tushnimb@qca.qualcomm.com>
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
[fix up whitespace damage, overly long lines]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This reflects that case is now completely separated.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This splits up the driver regulatory update on its
own, this helps simplify the reading the case.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This splits out the user regulatory update on its
own, this helps simplify reading the case.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This splits up the core regulatory update to be
set on its own helper. This should make it easier
to read exactly what type of requests should be
expected there. In this case its clear that
NL80211_REGDOM_SET_BY_CORE is only used by the
core for updating the world regulatory domain.
This is consistant with the nl80211.h documentation.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
[add warning to default switch case to avoid compiler warning]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

last_request is RCU protected, since we're getting it
on set_regdom() we might as well pass it to ensure the
same request is being processed, otherwise there is a
small race it could have changed. This makes processing
of the request atomic.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Drivers that set the WIPHY_FLAG_CUSTOM_REGULATORY skip
the core world regulatory domain updates, but do want
their reg_notifier() called. Move the check for this
closer to the source of the check that detected skipped
was required and while at it add a helper for the notifier
calling. This has no functional changes. This brings together
the place where we call the reg_notifier() will be called.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

It seems some out of tree drivers were using a regulatory_hint("00")
to trigger off the wiphy regulatory notifier, for those cases just
setting the WIPHY_FLAG_CUSTOM_REGULATORY would suffice to call
the reg_notifier() for a world regulatory domain update. If drivers
find other needs for calling the reg_notifier() a proper implemenation
is preferred.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

All the regulatory request process routines use the
same pattern.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This enforces proper RCU APIs accross the code.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This is common code, this reduces the chance of making
a mistake of how we free it.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

By dealing with non country IE conficts first we can shift
the code that deals with the conflict to the left. This has
no functional changes.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This is the last split up of the old unified __regultory_hint()
processing set of functionality, it moves the country IE processing
all on its own. This makes it easier to follow and read what exactly
is going on for the case of processing country IEs.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This makes the code easier to read and follow.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This makes the code path easier to read and lets us
split out some functionality that is only user specific,
that makes it easier to read the other types of requests.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This makes the code path easier to read for the core case.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
[add warning to default case in switch to avoid compile warning]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Currently nl80211 allows userspace to send the kernel
a bogus regulatory domain with at most 32 rules set
and it won't reject it until after its allocated
memory. Let's be smart about it and take advantage
that the last_request is now available under RTNL
and check if the alpha2 matches an expected request
and reject any bogus userspace requests prior to
hitting the memory allocator.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

If a custom regulatory domain is passed and if a rule for a
channel indicates it should be disabled that channel should
always remain disabled as per its documentation and design.

Likewise if WIPHY_FLAG_STRICT_REGULATORY flag is set and a
regulatory_hint() is issued if a channel is disabled that
channel should remain disabled.

Without this change only drivers that set the _orig flags
appropriately on their own would ensure disallowed channels
remaind disabled. This helps drivers save code by relying on
the APIS provided to entrust channels that should not be enabled
be respected by only having to use wiphy_apply_custom_regulatory()
or regulatory_hint() with the WIPHY_FLAG_STRICT_REGULATORY set.

If wiphy_apply_custom_regulatory() is used together with
WIPHY_FLAG_STRICT_REGULATORY and a regulatory_hint() issued
later, the incoming regulatory domain can override previously
set _orig parameters from the initial custom regulatory
setting.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The iniator is already available to us, so use it.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

wiphy_apply_custom_regulatory() implies WIPHY_FLAG_CUSTOM_REGULATORY
but we never enforced it, do that now and warn if the driver
didn't set it. All drivers should be following this today already.

Having WIPHY_FLAG_CUSTOM_REGULATORY does not however mean you will
use wiphy_apply_custom_regulatory() though, you may have your own
_orig value set up tools / helpers. The intel drivers are examples
of this type of driver.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

These two flags are used for the same purpose, just
combine them into a no-ir flag to annotate no initiating
radiation is allowed.

Old userspace sending either flag will have it treated as
the no-ir flag. To be considerate to older userspace we
also send both the no-ir flag and the old no-ibss flags.
Newer userspace will have to be aware of older kernels.

Update all places in the tree using these flags with the
following semantic patch:

@@
@@
-NL80211_RRF_PASSIVE_SCAN
+NL80211_RRF_NO_IR
@@
@@
-NL80211_RRF_NO_IBSS
+NL80211_RRF_NO_IR
@@
@@
-IEEE80211_CHAN_PASSIVE_SCAN
+IEEE80211_CHAN_NO_IR
@@
@@
-IEEE80211_CHAN_NO_IBSS
+IEEE80211_CHAN_NO_IR
@@
@@
-NL80211_RRF_NO_IR | NL80211_RRF_NO_IR
+NL80211_RRF_NO_IR
@@
@@
-IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_IR
+IEEE80211_CHAN_NO_IR
@@
@@
-(NL80211_RRF_NO_IR)
+NL80211_RRF_NO_IR
@@
@@
-(IEEE80211_CHAN_NO_IR)
+IEEE80211_CHAN_NO_IR

Along with some hand-optimisations in documentation, to
remove duplicates and to fix some indentation.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
[do all the driver updates in one go]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Drivers can now use this to parse the regulatory request and
be more verbose when needed.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Drivers can now use this to parse the regulatory request and
be more verbose when needed.
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This makes it easier to read.

Cc: smihir@qti.qualcomm.com
Cc: tushnimb@qca.qualcomm.com
Signed-off-by: NLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>