Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
/*
 * This file contains helper code to handle channel
 * settings and keeping track of what is possible at
 * any point in time.
 *
 * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 * Copyright 2018-2020	Intel Corporation
 */
 
#include <linux/export.h>
#include <linux/bitfield.h>
#include <net/cfg80211.h>
#include "core.h"
#include "rdev-ops.h"
 
static bool cfg80211_valid_60g_freq(u32 freq)
{
<------>return freq >= 58320 && freq <= 70200;
}
 
void cfg80211_chandef_create(struct cfg80211_chan_def *chandef,
<------><------><------>     struct ieee80211_channel *chan,
<------><------><------>     enum nl80211_channel_type chan_type)
{
<------>if (WARN_ON(!chan))
<------><------>return;
 
<------>chandef->chan = chan;
<------>chandef->freq1_offset = chan->freq_offset;
<------>chandef->center_freq2 = 0;
<------>chandef->edmg.bw_config = 0;
<------>chandef->edmg.channels = 0;
 
<------>switch (chan_type) {
<------>case NL80211_CHAN_NO_HT:
<------><------>chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
<------><------>chandef->center_freq1 = chan->center_freq;
<------><------>break;
<------>case NL80211_CHAN_HT20:
<------><------>chandef->width = NL80211_CHAN_WIDTH_20;
<------><------>chandef->center_freq1 = chan->center_freq;
<------><------>break;
<------>case NL80211_CHAN_HT40PLUS:
<------><------>chandef->width = NL80211_CHAN_WIDTH_40;
<------><------>chandef->center_freq1 = chan->center_freq + 10;
<------><------>break;
<------>case NL80211_CHAN_HT40MINUS:
<------><------>chandef->width = NL80211_CHAN_WIDTH_40;
<------><------>chandef->center_freq1 = chan->center_freq - 10;
<------><------>break;
<------>default:
<------><------>WARN_ON(1);
<------>}
}
EXPORT_SYMBOL(cfg80211_chandef_create);
 
static bool cfg80211_edmg_chandef_valid(const struct cfg80211_chan_def *chandef)
{
<------>int max_contiguous = 0;
<------>int num_of_enabled = 0;
<------>int contiguous = 0;
<------>int i;
 
<------>if (!chandef->edmg.channels || !chandef->edmg.bw_config)
<------><------>return false;
 
<------>if (!cfg80211_valid_60g_freq(chandef->chan->center_freq))
<------><------>return false;
 
<------>for (i = 0; i < 6; i++) {
<------><------>if (chandef->edmg.channels & BIT(i)) {
<------><------><------>contiguous++;
<------><------><------>num_of_enabled++;
<------><------>} else {
<------><------><------>contiguous = 0;
<------><------>}
 
<------><------>max_contiguous = max(contiguous, max_contiguous);
<------>}
<------>/* basic verification of edmg configuration according to
<------> * IEEE P802.11ay/D4.0 section 9.4.2.251
<------> */
<------>/* check bw_config against contiguous edmg channels */
<------>switch (chandef->edmg.bw_config) {
<------>case IEEE80211_EDMG_BW_CONFIG_4:
<------>case IEEE80211_EDMG_BW_CONFIG_8:
<------>case IEEE80211_EDMG_BW_CONFIG_12:
<------><------>if (max_contiguous < 1)
<------><------><------>return false;
<------><------>break;
<------>case IEEE80211_EDMG_BW_CONFIG_5:
<------>case IEEE80211_EDMG_BW_CONFIG_9:
<------>case IEEE80211_EDMG_BW_CONFIG_13:
<------><------>if (max_contiguous < 2)
<------><------><------>return false;
<------><------>break;
<------>case IEEE80211_EDMG_BW_CONFIG_6:
<------>case IEEE80211_EDMG_BW_CONFIG_10:
<------>case IEEE80211_EDMG_BW_CONFIG_14:
<------><------>if (max_contiguous < 3)
<------><------><------>return false;
<------><------>break;
<------>case IEEE80211_EDMG_BW_CONFIG_7:
<------>case IEEE80211_EDMG_BW_CONFIG_11:
<------>case IEEE80211_EDMG_BW_CONFIG_15:
<------><------>if (max_contiguous < 4)
<------><------><------>return false;
<------><------>break;
 
<------>default:
<------><------>return false;
<------>}
 
<------>/* check bw_config against aggregated (non contiguous) edmg channels */
<------>switch (chandef->edmg.bw_config) {
<------>case IEEE80211_EDMG_BW_CONFIG_4:
<------>case IEEE80211_EDMG_BW_CONFIG_5:
<------>case IEEE80211_EDMG_BW_CONFIG_6:
<------>case IEEE80211_EDMG_BW_CONFIG_7:
<------><------>break;
<------>case IEEE80211_EDMG_BW_CONFIG_8:
<------>case IEEE80211_EDMG_BW_CONFIG_9:
<------>case IEEE80211_EDMG_BW_CONFIG_10:
<------>case IEEE80211_EDMG_BW_CONFIG_11:
<------><------>if (num_of_enabled < 2)
<------><------><------>return false;
<------><------>break;
<------>case IEEE80211_EDMG_BW_CONFIG_12:
<------>case IEEE80211_EDMG_BW_CONFIG_13:
<------>case IEEE80211_EDMG_BW_CONFIG_14:
<------>case IEEE80211_EDMG_BW_CONFIG_15:
<------><------>if (num_of_enabled < 4 || max_contiguous < 2)
<------><------><------>return false;
<------><------>break;
<------>default:
<------><------>return false;
<------>}
 
<------>return true;
}
 
static int nl80211_chan_width_to_mhz(enum nl80211_chan_width chan_width)
{
<------>int mhz;
 
<------>switch (chan_width) {
<------>case NL80211_CHAN_WIDTH_1:
<------><------>mhz = 1;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_2:
<------><------>mhz = 2;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_4:
<------><------>mhz = 4;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_8:
<------><------>mhz = 8;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_16:
<------><------>mhz = 16;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_5:
<------><------>mhz = 5;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_10:
<------><------>mhz = 10;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_20:
<------>case NL80211_CHAN_WIDTH_20_NOHT:
<------><------>mhz = 20;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_40:
<------><------>mhz = 40;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_80P80:
<------>case NL80211_CHAN_WIDTH_80:
<------><------>mhz = 80;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_160:
<------><------>mhz = 160;
<------><------>break;
<------>default:
<------><------>WARN_ON_ONCE(1);
<------><------>return -1;
<------>}
<------>return mhz;
}
 
static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c)
{
<------>return nl80211_chan_width_to_mhz(c->width);
}
 
bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
{
<------>u32 control_freq, oper_freq;
<------>int oper_width, control_width;
 
<------>if (!chandef->chan)
<------><------>return false;
 
<------>if (chandef->freq1_offset >= 1000)
<------><------>return false;
 
<------>control_freq = chandef->chan->center_freq;
 
<------>switch (chandef->width) {
<------>case NL80211_CHAN_WIDTH_5:
<------>case NL80211_CHAN_WIDTH_10:
<------>case NL80211_CHAN_WIDTH_20:
<------>case NL80211_CHAN_WIDTH_20_NOHT:
<------><------>if (ieee80211_chandef_to_khz(chandef) !=
<------><------>    ieee80211_channel_to_khz(chandef->chan))
<------><------><------>return false;
<------><------>if (chandef->center_freq2)
<------><------><------>return false;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_1:
<------>case NL80211_CHAN_WIDTH_2:
<------>case NL80211_CHAN_WIDTH_4:
<------>case NL80211_CHAN_WIDTH_8:
<------>case NL80211_CHAN_WIDTH_16:
<------><------>if (chandef->chan->band != NL80211_BAND_S1GHZ)
<------><------><------>return false;
 
<------><------>control_freq = ieee80211_channel_to_khz(chandef->chan);
<------><------>oper_freq = ieee80211_chandef_to_khz(chandef);
<------><------>control_width = nl80211_chan_width_to_mhz(
<------><------><------><------><------>ieee80211_s1g_channel_width(
<------><------><------><------><------><------><------><------>chandef->chan));
<------><------>oper_width = cfg80211_chandef_get_width(chandef);
 
<------><------>if (oper_width < 0 || control_width < 0)
<------><------><------>return false;
<------><------>if (chandef->center_freq2)
<------><------><------>return false;
 
<------><------>if (control_freq + MHZ_TO_KHZ(control_width) / 2 >
<------><------>    oper_freq + MHZ_TO_KHZ(oper_width) / 2)
<------><------><------>return false;
 
<------><------>if (control_freq - MHZ_TO_KHZ(control_width) / 2 <
<------><------>    oper_freq - MHZ_TO_KHZ(oper_width) / 2)
<------><------><------>return false;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_40:
<------><------>if (chandef->center_freq1 != control_freq + 10 &&
<------><------>    chandef->center_freq1 != control_freq - 10)
<------><------><------>return false;
<------><------>if (chandef->center_freq2)
<------><------><------>return false;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_80P80:
<------><------>if (chandef->center_freq1 != control_freq + 30 &&
<------><------>    chandef->center_freq1 != control_freq + 10 &&
<------><------>    chandef->center_freq1 != control_freq - 10 &&
<------><------>    chandef->center_freq1 != control_freq - 30)
<------><------><------>return false;
<------><------>if (!chandef->center_freq2)
<------><------><------>return false;
<------><------>/* adjacent is not allowed -- that's a 160 MHz channel */
<------><------>if (chandef->center_freq1 - chandef->center_freq2 == 80 ||
<------><------>    chandef->center_freq2 - chandef->center_freq1 == 80)
<------><------><------>return false;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_80:
<------><------>if (chandef->center_freq1 != control_freq + 30 &&
<------><------>    chandef->center_freq1 != control_freq + 10 &&
<------><------>    chandef->center_freq1 != control_freq - 10 &&
<------><------>    chandef->center_freq1 != control_freq - 30)
<------><------><------>return false;
<------><------>if (chandef->center_freq2)
<------><------><------>return false;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_160:
<------><------>if (chandef->center_freq1 != control_freq + 70 &&
<------><------>    chandef->center_freq1 != control_freq + 50 &&
<------><------>    chandef->center_freq1 != control_freq + 30 &&
<------><------>    chandef->center_freq1 != control_freq + 10 &&
<------><------>    chandef->center_freq1 != control_freq - 10 &&
<------><------>    chandef->center_freq1 != control_freq - 30 &&
<------><------>    chandef->center_freq1 != control_freq - 50 &&
<------><------>    chandef->center_freq1 != control_freq - 70)
<------><------><------>return false;
<------><------>if (chandef->center_freq2)
<------><------><------>return false;
<------><------>break;
<------>default:
<------><------>return false;
<------>}
 
<------>/* channel 14 is only for IEEE 802.11b */
<------>if (chandef->center_freq1 == 2484 &&
<------>    chandef->width != NL80211_CHAN_WIDTH_20_NOHT)
<------><------>return false;
 
<------>if (cfg80211_chandef_is_edmg(chandef) &&
<------>    !cfg80211_edmg_chandef_valid(chandef))
<------><------>return false;
 
<------>return true;
}
EXPORT_SYMBOL(cfg80211_chandef_valid);
 
static void chandef_primary_freqs(const struct cfg80211_chan_def *c,
<------><------><------><------>  u32 *pri40, u32 *pri80)
{
<------>int tmp;
 
<------>switch (c->width) {
<------>case NL80211_CHAN_WIDTH_40:
<------><------>*pri40 = c->center_freq1;
<------><------>*pri80 = 0;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_80:
<------>case NL80211_CHAN_WIDTH_80P80:
<------><------>*pri80 = c->center_freq1;
<------><------>/* n_P20 */
<------><------>tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
<------><------>/* n_P40 */
<------><------>tmp /= 2;
<------><------>/* freq_P40 */
<------><------>*pri40 = c->center_freq1 - 20 + 40 * tmp;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_160:
<------><------>/* n_P20 */
<------><------>tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
<------><------>/* n_P40 */
<------><------>tmp /= 2;
<------><------>/* freq_P40 */
<------><------>*pri40 = c->center_freq1 - 60 + 40 * tmp;
<------><------>/* n_P80 */
<------><------>tmp /= 2;
<------><------>*pri80 = c->center_freq1 - 40 + 80 * tmp;
<------><------>break;
<------>default:
<------><------>WARN_ON_ONCE(1);
<------>}
}
 
const struct cfg80211_chan_def *
cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1,
<------><------><------>    const struct cfg80211_chan_def *c2)
{
<------>u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80;
 
<------>/* If they are identical, return */
<------>if (cfg80211_chandef_identical(c1, c2))
<------><------>return c1;
 
<------>/* otherwise, must have same control channel */
<------>if (c1->chan != c2->chan)
<------><------>return NULL;
 
<------>/*
<------> * If they have the same width, but aren't identical,
<------> * then they can't be compatible.
<------> */
<------>if (c1->width == c2->width)
<------><------>return NULL;
 
<------>/*
<------> * can't be compatible if one of them is 5 or 10 MHz,
<------> * but they don't have the same width.
<------> */
<------>if (c1->width == NL80211_CHAN_WIDTH_5 ||
<------>    c1->width == NL80211_CHAN_WIDTH_10 ||
<------>    c2->width == NL80211_CHAN_WIDTH_5 ||
<------>    c2->width == NL80211_CHAN_WIDTH_10)
<------><------>return NULL;
 
<------>if (c1->width == NL80211_CHAN_WIDTH_20_NOHT ||
<------>    c1->width == NL80211_CHAN_WIDTH_20)
<------><------>return c2;
 
<------>if (c2->width == NL80211_CHAN_WIDTH_20_NOHT ||
<------>    c2->width == NL80211_CHAN_WIDTH_20)
<------><------>return c1;
 
<------>chandef_primary_freqs(c1, &c1_pri40, &c1_pri80);
<------>chandef_primary_freqs(c2, &c2_pri40, &c2_pri80);
 
<------>if (c1_pri40 != c2_pri40)
<------><------>return NULL;
 
<------>WARN_ON(!c1_pri80 && !c2_pri80);
<------>if (c1_pri80 && c2_pri80 && c1_pri80 != c2_pri80)
<------><------>return NULL;
 
<------>if (c1->width > c2->width)
<------><------>return c1;
<------>return c2;
}
EXPORT_SYMBOL(cfg80211_chandef_compatible);
 
static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq,
<------><------><------><------><------> u32 bandwidth,
<------><------><------><------><------> enum nl80211_dfs_state dfs_state)
{
<------>struct ieee80211_channel *c;
<------>u32 freq;
 
<------>for (freq = center_freq - bandwidth/2 + 10;
<------>     freq <= center_freq + bandwidth/2 - 10;
<------>     freq += 20) {
<------><------>c = ieee80211_get_channel(wiphy, freq);
<------><------>if (!c || !(c->flags & IEEE80211_CHAN_RADAR))
<------><------><------>continue;
 
<------><------>c->dfs_state = dfs_state;
<------><------>c->dfs_state_entered = jiffies;
<------>}
}
 
void cfg80211_set_dfs_state(struct wiphy *wiphy,
<------><------><------>    const struct cfg80211_chan_def *chandef,
<------><------><------>    enum nl80211_dfs_state dfs_state)
{
<------>int width;
 
<------>if (WARN_ON(!cfg80211_chandef_valid(chandef)))
<------><------>return;
 
<------>width = cfg80211_chandef_get_width(chandef);
<------>if (width < 0)
<------><------>return;
 
<------>cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1,
<------><------><------><------>     width, dfs_state);
 
<------>if (!chandef->center_freq2)
<------><------>return;
<------>cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2,
<------><------><------><------>     width, dfs_state);
}
 
static u32 cfg80211_get_start_freq(u32 center_freq,
<------><------><------><------>   u32 bandwidth)
{
<------>u32 start_freq;
 
<------>bandwidth = MHZ_TO_KHZ(bandwidth);
<------>if (bandwidth <= MHZ_TO_KHZ(20))
<------><------>start_freq = center_freq;
<------>else
<------><------>start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10);
 
<------>return start_freq;
}
 
static u32 cfg80211_get_end_freq(u32 center_freq,
<------><------><------><------> u32 bandwidth)
{
<------>u32 end_freq;
 
<------>bandwidth = MHZ_TO_KHZ(bandwidth);
<------>if (bandwidth <= MHZ_TO_KHZ(20))
<------><------>end_freq = center_freq;
<------>else
<------><------>end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10);
 
<------>return end_freq;
}
 
static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy,
<------><------><------><------><------>    u32 center_freq,
<------><------><------><------><------>    u32 bandwidth)
{
<------>struct ieee80211_channel *c;
<------>u32 freq, start_freq, end_freq;
 
<------>start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
<------>end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
 
<------>for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) {
<------><------>c = ieee80211_get_channel_khz(wiphy, freq);
<------><------>if (!c)
<------><------><------>return -EINVAL;
 
<------><------>if (c->flags & IEEE80211_CHAN_RADAR)
<------><------><------>return 1;
<------>}
<------>return 0;
}
 
 
int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
<------><------><------><------>  const struct cfg80211_chan_def *chandef,
<------><------><------><------>  enum nl80211_iftype iftype)
{
<------>int width;
<------>int ret;
 
<------>if (WARN_ON(!cfg80211_chandef_valid(chandef)))
<------><------>return -EINVAL;
 
<------>switch (iftype) {
<------>case NL80211_IFTYPE_ADHOC:
<------>case NL80211_IFTYPE_AP:
<------>case NL80211_IFTYPE_P2P_GO:
<------>case NL80211_IFTYPE_MESH_POINT:
<------><------>width = cfg80211_chandef_get_width(chandef);
<------><------>if (width < 0)
<------><------><------>return -EINVAL;
 
<------><------>ret = cfg80211_get_chans_dfs_required(wiphy,
<------><------><------><------><------>ieee80211_chandef_to_khz(chandef),
<------><------><------><------><------>width);
<------><------>if (ret < 0)
<------><------><------>return ret;
<------><------>else if (ret > 0)
<------><------><------>return BIT(chandef->width);
 
<------><------>if (!chandef->center_freq2)
<------><------><------>return 0;
 
<------><------>ret = cfg80211_get_chans_dfs_required(wiphy,
<------><------><------><------><------>MHZ_TO_KHZ(chandef->center_freq2),
<------><------><------><------><------>width);
<------><------>if (ret < 0)
<------><------><------>return ret;
<------><------>else if (ret > 0)
<------><------><------>return BIT(chandef->width);
 
<------><------>break;
<------>case NL80211_IFTYPE_STATION:
<------>case NL80211_IFTYPE_OCB:
<------>case NL80211_IFTYPE_P2P_CLIENT:
<------>case NL80211_IFTYPE_MONITOR:
<------>case NL80211_IFTYPE_AP_VLAN:
<------>case NL80211_IFTYPE_WDS:
<------>case NL80211_IFTYPE_P2P_DEVICE:
<------>case NL80211_IFTYPE_NAN:
<------><------>break;
<------>case NL80211_IFTYPE_UNSPECIFIED:
<------>case NUM_NL80211_IFTYPES:
<------><------>WARN_ON(1);
<------>}
 
<------>return 0;
}
EXPORT_SYMBOL(cfg80211_chandef_dfs_required);
 
static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy,
<------><------><------><------><------> u32 center_freq,
<------><------><------><------><------> u32 bandwidth)
{
<------>struct ieee80211_channel *c;
<------>u32 freq, start_freq, end_freq;
<------>int count = 0;
 
<------>start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
<------>end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
 
<------>/*
<------> * Check entire range of channels for the bandwidth.
<------> * Check all channels are DFS channels (DFS_USABLE or
<------> * DFS_AVAILABLE). Return number of usable channels
<------> * (require CAC). Allow DFS and non-DFS channel mix.
<------> */
<------>for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) {
<------><------>c = ieee80211_get_channel_khz(wiphy, freq);
<------><------>if (!c)
<------><------><------>return -EINVAL;
 
<------><------>if (c->flags & IEEE80211_CHAN_DISABLED)
<------><------><------>return -EINVAL;
 
<------><------>if (c->flags & IEEE80211_CHAN_RADAR) {
<------><------><------>if (c->dfs_state == NL80211_DFS_UNAVAILABLE)
<------><------><------><------>return -EINVAL;
 
<------><------><------>if (c->dfs_state == NL80211_DFS_USABLE)
<------><------><------><------>count++;
<------><------>}
<------>}
 
<------>return count;
}
 
bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
<------><------><------><------> const struct cfg80211_chan_def *chandef)
{
<------>int width;
<------>int r1, r2 = 0;
 
<------>if (WARN_ON(!cfg80211_chandef_valid(chandef)))
<------><------>return false;
 
<------>width = cfg80211_chandef_get_width(chandef);
<------>if (width < 0)
<------><------>return false;
 
<------>r1 = cfg80211_get_chans_dfs_usable(wiphy,
<------><------><------><------><------>   MHZ_TO_KHZ(chandef->center_freq1),
<------><------><------><------><------>   width);
 
<------>if (r1 < 0)
<------><------>return false;
 
<------>switch (chandef->width) {
<------>case NL80211_CHAN_WIDTH_80P80:
<------><------>WARN_ON(!chandef->center_freq2);
<------><------>r2 = cfg80211_get_chans_dfs_usable(wiphy,
<------><------><------><------><------>MHZ_TO_KHZ(chandef->center_freq2),
<------><------><------><------><------>width);
<------><------>if (r2 < 0)
<------><------><------>return false;
<------><------>break;
<------>default:
<------><------>WARN_ON(chandef->center_freq2);
<------><------>break;
<------>}
 
<------>return (r1 + r2 > 0);
}
 
/*
 * Checks if center frequency of chan falls with in the bandwidth
 * range of chandef.
 */
bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
<------><------><------>  struct ieee80211_channel *chan)
{
<------>int width;
<------>u32 freq;
 
<------>if (chandef->chan->center_freq == chan->center_freq)
<------><------>return true;
 
<------>width = cfg80211_chandef_get_width(chandef);
<------>if (width <= 20)
<------><------>return false;
 
<------>for (freq = chandef->center_freq1 - width / 2 + 10;
<------>     freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) {
<------><------>if (chan->center_freq == freq)
<------><------><------>return true;
<------>}
 
<------>if (!chandef->center_freq2)
<------><------>return false;
 
<------>for (freq = chandef->center_freq2 - width / 2 + 10;
<------>     freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) {
<------><------>if (chan->center_freq == freq)
<------><------><------>return true;
<------>}
 
<------>return false;
}
 
bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev)
{
<------>bool active = false;
 
<------>ASSERT_WDEV_LOCK(wdev);
 
<------>if (!wdev->chandef.chan)
<------><------>return false;
 
<------>switch (wdev->iftype) {
<------>case NL80211_IFTYPE_AP:
<------>case NL80211_IFTYPE_P2P_GO:
<------><------>active = wdev->beacon_interval != 0;
<------><------>break;
<------>case NL80211_IFTYPE_ADHOC:
<------><------>active = wdev->ssid_len != 0;
<------><------>break;
<------>case NL80211_IFTYPE_MESH_POINT:
<------><------>active = wdev->mesh_id_len != 0;
<------><------>break;
<------>case NL80211_IFTYPE_STATION:
<------>case NL80211_IFTYPE_OCB:
<------>case NL80211_IFTYPE_P2P_CLIENT:
<------>case NL80211_IFTYPE_MONITOR:
<------>case NL80211_IFTYPE_AP_VLAN:
<------>case NL80211_IFTYPE_WDS:
<------>case NL80211_IFTYPE_P2P_DEVICE:
<------>/* Can NAN type be considered as beaconing interface? */
<------>case NL80211_IFTYPE_NAN:
<------><------>break;
<------>case NL80211_IFTYPE_UNSPECIFIED:
<------>case NUM_NL80211_IFTYPES:
<------><------>WARN_ON(1);
<------>}
 
<------>return active;
}
 
static bool cfg80211_is_wiphy_oper_chan(struct wiphy *wiphy,
<------><------><------><------><------>struct ieee80211_channel *chan)
{
<------>struct wireless_dev *wdev;
 
<------>list_for_each_entry(wdev, &wiphy->wdev_list, list) {
<------><------>wdev_lock(wdev);
<------><------>if (!cfg80211_beaconing_iface_active(wdev)) {
<------><------><------>wdev_unlock(wdev);
<------><------><------>continue;
<------><------>}
 
<------><------>if (cfg80211_is_sub_chan(&wdev->chandef, chan)) {
<------><------><------>wdev_unlock(wdev);
<------><------><------>return true;
<------><------>}
<------><------>wdev_unlock(wdev);
<------>}
 
<------>return false;
}
 
bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
<------><------><------><------>  struct ieee80211_channel *chan)
{
<------>struct cfg80211_registered_device *rdev;
 
<------>ASSERT_RTNL();
 
<------>if (!(chan->flags & IEEE80211_CHAN_RADAR))
<------><------>return false;
 
<------>list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
<------><------>if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
<------><------><------>continue;
 
<------><------>if (cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan))
<------><------><------>return true;
<------>}
 
<------>return false;
}
 
static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy,
<------><------><------><------><------>     u32 center_freq,
<------><------><------><------><------>     u32 bandwidth)
{
<------>struct ieee80211_channel *c;
<------>u32 freq, start_freq, end_freq;
<------>bool dfs_offload;
 
<------>dfs_offload = wiphy_ext_feature_isset(wiphy,
<------><------><------><------><------>      NL80211_EXT_FEATURE_DFS_OFFLOAD);
 
<------>start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
<------>end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
 
<------>/*
<------> * Check entire range of channels for the bandwidth.
<------> * If any channel in between is disabled or has not
<------> * had gone through CAC return false
<------> */
<------>for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) {
<------><------>c = ieee80211_get_channel_khz(wiphy, freq);
<------><------>if (!c)
<------><------><------>return false;
 
<------><------>if (c->flags & IEEE80211_CHAN_DISABLED)
<------><------><------>return false;
 
<------><------>if ((c->flags & IEEE80211_CHAN_RADAR) &&
<------><------>    (c->dfs_state != NL80211_DFS_AVAILABLE) &&
<------><------>    !(c->dfs_state == NL80211_DFS_USABLE && dfs_offload))
<------><------><------>return false;
<------>}
 
<------>return true;
}
 
static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy,
<------><------><------><------>const struct cfg80211_chan_def *chandef)
{
<------>int width;
<------>int r;
 
<------>if (WARN_ON(!cfg80211_chandef_valid(chandef)))
<------><------>return false;
 
<------>width = cfg80211_chandef_get_width(chandef);
<------>if (width < 0)
<------><------>return false;
 
<------>r = cfg80211_get_chans_dfs_available(wiphy,
<------><------><------><------><------>     MHZ_TO_KHZ(chandef->center_freq1),
<------><------><------><------><------>     width);
 
<------>/* If any of channels unavailable for cf1 just return */
<------>if (!r)
<------><------>return r;
 
<------>switch (chandef->width) {
<------>case NL80211_CHAN_WIDTH_80P80:
<------><------>WARN_ON(!chandef->center_freq2);
<------><------>r = cfg80211_get_chans_dfs_available(wiphy,
<------><------><------><------><------>MHZ_TO_KHZ(chandef->center_freq2),
<------><------><------><------><------>width);
<------><------>break;
<------>default:
<------><------>WARN_ON(chandef->center_freq2);
<------><------>break;
<------>}
 
<------>return r;
}
 
static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy,
<------><------><------><------><------><------>    u32 center_freq,
<------><------><------><------><------><------>    u32 bandwidth)
{
<------>struct ieee80211_channel *c;
<------>u32 start_freq, end_freq, freq;
<------>unsigned int dfs_cac_ms = 0;
 
<------>start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
<------>end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
 
<------>for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) {
<------><------>c = ieee80211_get_channel_khz(wiphy, freq);
<------><------>if (!c)
<------><------><------>return 0;
 
<------><------>if (c->flags & IEEE80211_CHAN_DISABLED)
<------><------><------>return 0;
 
<------><------>if (!(c->flags & IEEE80211_CHAN_RADAR))
<------><------><------>continue;
 
<------><------>if (c->dfs_cac_ms > dfs_cac_ms)
<------><------><------>dfs_cac_ms = c->dfs_cac_ms;
<------>}
 
<------>return dfs_cac_ms;
}
 
unsigned int
cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
<------><------><------>      const struct cfg80211_chan_def *chandef)
{
<------>int width;
<------>unsigned int t1 = 0, t2 = 0;
 
<------>if (WARN_ON(!cfg80211_chandef_valid(chandef)))
<------><------>return 0;
 
<------>width = cfg80211_chandef_get_width(chandef);
<------>if (width < 0)
<------><------>return 0;
 
<------>t1 = cfg80211_get_chans_dfs_cac_time(wiphy,
<------><------><------><------><------>     MHZ_TO_KHZ(chandef->center_freq1),
<------><------><------><------><------>     width);
 
<------>if (!chandef->center_freq2)
<------><------>return t1;
 
<------>t2 = cfg80211_get_chans_dfs_cac_time(wiphy,
<------><------><------><------><------>     MHZ_TO_KHZ(chandef->center_freq2),
<------><------><------><------><------>     width);
 
<------>return max(t1, t2);
}
 
static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy,
<------><------><------><------><------>u32 center_freq, u32 bandwidth,
<------><------><------><------><------>u32 prohibited_flags)
{
<------>struct ieee80211_channel *c;
<------>u32 freq, start_freq, end_freq;
 
<------>start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
<------>end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
 
<------>for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) {
<------><------>c = ieee80211_get_channel_khz(wiphy, freq);
<------><------>if (!c || c->flags & prohibited_flags)
<------><------><------>return false;
<------>}
 
<------>return true;
}
 
/* check if the operating channels are valid and supported */
static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels,
<------><------><------><------> enum ieee80211_edmg_bw_config edmg_bw_config,
<------><------><------><------> int primary_channel,
<------><------><------><------> struct ieee80211_edmg *edmg_cap)
{
<------>struct ieee80211_channel *chan;
<------>int i, freq;
<------>int channels_counter = 0;
 
<------>if (!edmg_channels && !edmg_bw_config)
<------><------>return true;
 
<------>if ((!edmg_channels && edmg_bw_config) ||
<------>    (edmg_channels && !edmg_bw_config))
<------><------>return false;
 
<------>if (!(edmg_channels & BIT(primary_channel - 1)))
<------><------>return false;
 
<------>/* 60GHz channels 1..6 */
<------>for (i = 0; i < 6; i++) {
<------><------>if (!(edmg_channels & BIT(i)))
<------><------><------>continue;
 
<------><------>if (!(edmg_cap->channels & BIT(i)))
<------><------><------>return false;
 
<------><------>channels_counter++;
 
<------><------>freq = ieee80211_channel_to_frequency(i + 1,
<------><------><------><------><------><------>      NL80211_BAND_60GHZ);
<------><------>chan = ieee80211_get_channel(wiphy, freq);
<------><------>if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
<------><------><------>return false;
<------>}
 
<------>/* IEEE802.11 allows max 4 channels */
<------>if (channels_counter > 4)
<------><------>return false;
 
<------>/* check bw_config is a subset of what driver supports
<------> * (see IEEE P802.11ay/D4.0 section 9.4.2.251, Table 13)
<------> */
<------>if ((edmg_bw_config % 4) > (edmg_cap->bw_config % 4))
<------><------>return false;
 
<------>if (edmg_bw_config > edmg_cap->bw_config)
<------><------>return false;
 
<------>return true;
}
 
bool cfg80211_chandef_usable(struct wiphy *wiphy,
<------><------><------>     const struct cfg80211_chan_def *chandef,
<------><------><------>     u32 prohibited_flags)
{
<------>struct ieee80211_sta_ht_cap *ht_cap;
<------>struct ieee80211_sta_vht_cap *vht_cap;
<------>struct ieee80211_edmg *edmg_cap;
<------>u32 width, control_freq, cap;
<------>bool support_80_80 = false;
 
<------>if (WARN_ON(!cfg80211_chandef_valid(chandef)))
<------><------>return false;
 
<------>ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap;
<------>vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap;
<------>edmg_cap = &wiphy->bands[chandef->chan->band]->edmg_cap;
 
<------>if (edmg_cap->channels &&
<------>    !cfg80211_edmg_usable(wiphy,
<------><------><------><------>  chandef->edmg.channels,
<------><------><------><------>  chandef->edmg.bw_config,
<------><------><------><------>  chandef->chan->hw_value,
<------><------><------><------>  edmg_cap))
<------><------>return false;
 
<------>control_freq = chandef->chan->center_freq;
 
<------>switch (chandef->width) {
<------>case NL80211_CHAN_WIDTH_1:
<------><------>width = 1;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_2:
<------><------>width = 2;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_4:
<------><------>width = 4;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_8:
<------><------>width = 8;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_16:
<------><------>width = 16;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_5:
<------><------>width = 5;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_10:
<------><------>prohibited_flags |= IEEE80211_CHAN_NO_10MHZ;
<------><------>width = 10;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_20:
<------><------>if (!ht_cap->ht_supported &&
<------><------>    chandef->chan->band != NL80211_BAND_6GHZ)
<------><------><------>return false;
<------><------>fallthrough;
<------>case NL80211_CHAN_WIDTH_20_NOHT:
<------><------>prohibited_flags |= IEEE80211_CHAN_NO_20MHZ;
<------><------>width = 20;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_40:
<------><------>width = 40;
<------><------>if (chandef->chan->band == NL80211_BAND_6GHZ)
<------><------><------>break;
<------><------>if (!ht_cap->ht_supported)
<------><------><------>return false;
<------><------>if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
<------><------>    ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT)
<------><------><------>return false;
<------><------>if (chandef->center_freq1 < control_freq &&
<------><------>    chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
<------><------><------>return false;
<------><------>if (chandef->center_freq1 > control_freq &&
<------><------>    chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
<------><------><------>return false;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_80P80:
<------><------>cap = vht_cap->cap;
<------><------>support_80_80 =
<------><------><------>(cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
<------><------><------>(cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
<------><------><------> cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
<------><------><------>u32_get_bits(cap, IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) > 1;
<------><------>if (chandef->chan->band != NL80211_BAND_6GHZ && !support_80_80)
<------><------><------>return false;
<------><------>fallthrough;
<------>case NL80211_CHAN_WIDTH_80:
<------><------>prohibited_flags |= IEEE80211_CHAN_NO_80MHZ;
<------><------>width = 80;
<------><------>if (chandef->chan->band == NL80211_BAND_6GHZ)
<------><------><------>break;
<------><------>if (!vht_cap->vht_supported)
<------><------><------>return false;
<------><------>break;
<------>case NL80211_CHAN_WIDTH_160:
<------><------>prohibited_flags |= IEEE80211_CHAN_NO_160MHZ;
<------><------>width = 160;
<------><------>if (chandef->chan->band == NL80211_BAND_6GHZ)
<------><------><------>break;
<------><------>if (!vht_cap->vht_supported)
<------><------><------>return false;
<------><------>cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
<------><------>if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
<------><------>    cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ &&
<------><------>    !(vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))
<------><------><------>return false;
<------><------>break;
<------>default:
<------><------>WARN_ON_ONCE(1);
<------><------>return false;
<------>}
 
<------>/*
<------> * TODO: What if there are only certain 80/160/80+80 MHz channels
<------> *	 allowed by the driver, or only certain combinations?
<------> *	 For 40 MHz the driver can set the NO_HT40 flags, but for
<------> *	 80/160 MHz and in particular 80+80 MHz this isn't really
<------> *	 feasible and we only have NO_80MHZ/NO_160MHZ so far but
<------> *	 no way to cover 80+80 MHz or more complex restrictions.
<------> *	 Note that such restrictions also need to be advertised to
<------> *	 userspace, for example for P2P channel selection.
<------> */
 
<------>if (width > 20)
<------><------>prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
 
<------>/* 5 and 10 MHz are only defined for the OFDM PHY */
<------>if (width < 20)
<------><------>prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
 
 
<------>if (!cfg80211_secondary_chans_ok(wiphy,
<------><------><------><------><------> ieee80211_chandef_to_khz(chandef),
<------><------><------><------><------> width, prohibited_flags))
<------><------>return false;
 
<------>if (!chandef->center_freq2)
<------><------>return true;
<------>return cfg80211_secondary_chans_ok(wiphy,
<------><------><------><------><------>   MHZ_TO_KHZ(chandef->center_freq2),
<------><------><------><------><------>   width, prohibited_flags);
}
EXPORT_SYMBOL(cfg80211_chandef_usable);
 
/*
 * Check if the channel can be used under permissive conditions mandated by
 * some regulatory bodies, i.e., the channel is marked with
 * IEEE80211_CHAN_IR_CONCURRENT and there is an additional station interface
 * associated to an AP on the same channel or on the same UNII band
 * (assuming that the AP is an authorized master).
 * In addition allow operation on a channel on which indoor operation is
 * allowed, iff we are currently operating in an indoor environment.
 */
static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy,
<------><------><------><------><------>enum nl80211_iftype iftype,
<------><------><------><------><------>struct ieee80211_channel *chan)
{
<------>struct wireless_dev *wdev;
<------>struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 
<------>ASSERT_RTNL();
 
<------>if (!IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) ||
<------>    !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR))
<------><------>return false;
 
<------>/* only valid for GO and TDLS off-channel (station/p2p-CL) */
<------>if (iftype != NL80211_IFTYPE_P2P_GO &&
<------>    iftype != NL80211_IFTYPE_STATION &&
<------>    iftype != NL80211_IFTYPE_P2P_CLIENT)
<------><------>return false;
 
<------>if (regulatory_indoor_allowed() &&
<------>    (chan->flags & IEEE80211_CHAN_INDOOR_ONLY))
<------><------>return true;
 
<------>if (!(chan->flags & IEEE80211_CHAN_IR_CONCURRENT))
<------><------>return false;
 
<------>/*
<------> * Generally, it is possible to rely on another device/driver to allow
<------> * the IR concurrent relaxation, however, since the device can further
<------> * enforce the relaxation (by doing a similar verifications as this),
<------> * and thus fail the GO instantiation, consider only the interfaces of
<------> * the current registered device.
<------> */
<------>list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
<------><------>struct ieee80211_channel *other_chan = NULL;
<------><------>int r1, r2;
 
<------><------>wdev_lock(wdev);
<------><------>if (wdev->iftype == NL80211_IFTYPE_STATION &&
<------><------>    wdev->current_bss)
<------><------><------>other_chan = wdev->current_bss->pub.channel;
 
<------><------>/*
<------><------> * If a GO already operates on the same GO_CONCURRENT channel,
<------><------> * this one (maybe the same one) can beacon as well. We allow
<------><------> * the operation even if the station we relied on with
<------><------> * GO_CONCURRENT is disconnected now. But then we must make sure
<------><------> * we're not outdoor on an indoor-only channel.
<------><------> */
<------><------>if (iftype == NL80211_IFTYPE_P2P_GO &&
<------><------>    wdev->iftype == NL80211_IFTYPE_P2P_GO &&
<------><------>    wdev->beacon_interval &&
<------><------>    !(chan->flags & IEEE80211_CHAN_INDOOR_ONLY))
<------><------><------>other_chan = wdev->chandef.chan;
<------><------>wdev_unlock(wdev);
 
<------><------>if (!other_chan)
<------><------><------>continue;
 
<------><------>if (chan == other_chan)
<------><------><------>return true;
 
<------><------>if (chan->band != NL80211_BAND_5GHZ &&
<------><------>    chan->band != NL80211_BAND_6GHZ)
<------><------><------>continue;
 
<------><------>r1 = cfg80211_get_unii(chan->center_freq);
<------><------>r2 = cfg80211_get_unii(other_chan->center_freq);
 
<------><------>if (r1 != -EINVAL && r1 == r2) {
<------><------><------>/*
<------><------><------> * At some locations channels 149-165 are considered a
<------><------><------> * bundle, but at other locations, e.g., Indonesia,
<------><------><------> * channels 149-161 are considered a bundle while
<------><------><------> * channel 165 is left out and considered to be in a
<------><------><------> * different bundle. Thus, in case that there is a
<------><------><------> * station interface connected to an AP on channel 165,
<------><------><------> * it is assumed that channels 149-161 are allowed for
<------><------><------> * GO operations. However, having a station interface
<------><------><------> * connected to an AP on channels 149-161, does not
<------><------><------> * allow GO operation on channel 165.
<------><------><------> */
<------><------><------>if (chan->center_freq == 5825 &&
<------><------><------>    other_chan->center_freq != 5825)
<------><------><------><------>continue;
<------><------><------>return true;
<------><------>}
<------>}
 
<------>return false;
}
 
static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy,
<------><------><------><------>     struct cfg80211_chan_def *chandef,
<------><------><------><------>     enum nl80211_iftype iftype,
<------><------><------><------>     bool check_no_ir)
{
<------>bool res;
<------>u32 prohibited_flags = IEEE80211_CHAN_DISABLED |
<------><------><------>       IEEE80211_CHAN_RADAR;
 
<------>trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir);
 
<------>if (check_no_ir)
<------><------>prohibited_flags |= IEEE80211_CHAN_NO_IR;
 
<------>if (cfg80211_chandef_dfs_required(wiphy, chandef, iftype) > 0 &&
<------>    cfg80211_chandef_dfs_available(wiphy, chandef)) {
<------><------>/* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */
<------><------>prohibited_flags = IEEE80211_CHAN_DISABLED;
<------>}
 
<------>res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags);
 
<------>trace_cfg80211_return_bool(res);
<------>return res;
}
 
bool cfg80211_reg_can_beacon(struct wiphy *wiphy,
<------><------><------>     struct cfg80211_chan_def *chandef,
<------><------><------>     enum nl80211_iftype iftype)
{
<------>return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true);
}
EXPORT_SYMBOL(cfg80211_reg_can_beacon);
 
bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy,
<------><------><------><------>   struct cfg80211_chan_def *chandef,
<------><------><------><------>   enum nl80211_iftype iftype)
{
<------>bool check_no_ir;
 
<------>ASSERT_RTNL();
 
<------>/*
<------> * Under certain conditions suggested by some regulatory bodies a
<------> * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag
<------> * only if such relaxations are not enabled and the conditions are not
<------> * met.
<------> */
<------>check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype,
<------><------><------><------><------><------>   chandef->chan);
 
<------>return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir);
}
EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax);
 
int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
<------><------><------><------> struct cfg80211_chan_def *chandef)
{
<------>if (!rdev->ops->set_monitor_channel)
<------><------>return -EOPNOTSUPP;
<------>if (!cfg80211_has_monitors_only(rdev))
<------><------>return -EBUSY;
 
<------>return rdev_set_monitor_channel(rdev, chandef);
}
 
void
cfg80211_get_chan_state(struct wireless_dev *wdev,
<------><------>        struct ieee80211_channel **chan,
<------><------>        enum cfg80211_chan_mode *chanmode,
<------><------>        u8 *radar_detect)
{
<------>int ret;
 
<------>*chan = NULL;
<------>*chanmode = CHAN_MODE_UNDEFINED;
 
<------>ASSERT_WDEV_LOCK(wdev);
 
<------>if (wdev->netdev && !netif_running(wdev->netdev))
<------><------>return;
 
<------>switch (wdev->iftype) {
<------>case NL80211_IFTYPE_ADHOC:
<------><------>if (wdev->current_bss) {
<------><------><------>*chan = wdev->current_bss->pub.channel;
<------><------><------>*chanmode = (wdev->ibss_fixed &&
<------><------><------><------>     !wdev->ibss_dfs_possible)
<------><------><------><------>  ? CHAN_MODE_SHARED
<------><------><------><------>  : CHAN_MODE_EXCLUSIVE;
 
<------><------><------>/* consider worst-case - IBSS can try to return to the
<------><------><------> * original user-specified channel as creator */
<------><------><------>if (wdev->ibss_dfs_possible)
<------><------><------><------>*radar_detect |= BIT(wdev->chandef.width);
<------><------><------>return;
<------><------>}
<------><------>break;
<------>case NL80211_IFTYPE_STATION:
<------>case NL80211_IFTYPE_P2P_CLIENT:
<------><------>if (wdev->current_bss) {
<------><------><------>*chan = wdev->current_bss->pub.channel;
<------><------><------>*chanmode = CHAN_MODE_SHARED;
<------><------><------>return;
<------><------>}
<------><------>break;
<------>case NL80211_IFTYPE_AP:
<------>case NL80211_IFTYPE_P2P_GO:
<------><------>if (wdev->cac_started) {
<------><------><------>*chan = wdev->chandef.chan;
<------><------><------>*chanmode = CHAN_MODE_SHARED;
<------><------><------>*radar_detect |= BIT(wdev->chandef.width);
<------><------>} else if (wdev->beacon_interval) {
<------><------><------>*chan = wdev->chandef.chan;
<------><------><------>*chanmode = CHAN_MODE_SHARED;
 
<------><------><------>ret = cfg80211_chandef_dfs_required(wdev->wiphy,
<------><------><------><------><------><------><------>    &wdev->chandef,
<------><------><------><------><------><------><------>    wdev->iftype);
<------><------><------>WARN_ON(ret < 0);
<------><------><------>if (ret > 0)
<------><------><------><------>*radar_detect |= BIT(wdev->chandef.width);
<------><------>}
<------><------>return;
<------>case NL80211_IFTYPE_MESH_POINT:
<------><------>if (wdev->mesh_id_len) {
<------><------><------>*chan = wdev->chandef.chan;
<------><------><------>*chanmode = CHAN_MODE_SHARED;
 
<------><------><------>ret = cfg80211_chandef_dfs_required(wdev->wiphy,
<------><------><------><------><------><------><------>    &wdev->chandef,
<------><------><------><------><------><------><------>    wdev->iftype);
<------><------><------>WARN_ON(ret < 0);
<------><------><------>if (ret > 0)
<------><------><------><------>*radar_detect |= BIT(wdev->chandef.width);
<------><------>}
<------><------>return;
<------>case NL80211_IFTYPE_OCB:
<------><------>if (wdev->chandef.chan) {
<------><------><------>*chan = wdev->chandef.chan;
<------><------><------>*chanmode = CHAN_MODE_SHARED;
<------><------><------>return;
<------><------>}
<------><------>break;
<------>case NL80211_IFTYPE_MONITOR:
<------>case NL80211_IFTYPE_AP_VLAN:
<------>case NL80211_IFTYPE_WDS:
<------>case NL80211_IFTYPE_P2P_DEVICE:
<------>case NL80211_IFTYPE_NAN:
<------><------>/* these interface types don't really have a channel */
<------><------>return;
<------>case NL80211_IFTYPE_UNSPECIFIED:
<------>case NUM_NL80211_IFTYPES:
<------><------>WARN_ON(1);
<------>}
}