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rtl8812au/os_dep/linux/wifi_regd.c
Christian Sarre d8ad927155 Fix build on 6.x kernels. 
It was broken due to kernel changes backported from 6.5 (torvalds/linux@e8c2af6).
Changes have been tested on the following configurations and observed to build:
 - Debian Bullseye, kernel 6.1.38-4 (bullseye-backports)
 - Debian Bookworm, kernel 6.1.52-1
 - Ubuntu 23.04 Lunar, kernel 6.2.0-36

There are also other kernel versions which are affected up to some point in their history,
but there were a few reasons I ended up not including them:
 - Kernel 6.2: Not in use on Debian, likely skipped in favor of 6.4+. Ubuntu though has backported the change to 6.2 on Lunar.
 - Kernel 6.3: Not in use on Debian/Ubuntu, seems to have been skipped in favor of 6.4/6.5+.
 - Kernel 6.4: Not in use on Ubuntu. Debian Bookworm has this available in backports, but they now also offer 6.5 which does not have the issue.

In case someone tries to build this module running kernel 6.2 on something other than Ubuntu, this fix is most likely necessary.
2023-10-31 21:04:54 +02:00

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/******************************************************************************
*
* Copyright(c) 2009-2010 - 2017 Realtek Corporation.
*
* 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.
*
*****************************************************************************/
#include <drv_types.h>
#ifdef CONFIG_IOCTL_CFG80211
#include <rtw_wifi_regd.h>
static struct country_code_to_enum_rd allCountries[] = {
{COUNTRY_CODE_USER, "RD"},
};
/*
* REG_RULE(freq start, freq end, bandwidth, max gain, eirp, reg_flags)
*/
/*
*Only these channels all allow active
*scan on all world regulatory domains
*/
/* 2G chan 01 - chan 11 */
#define RTW_2GHZ_CH01_11 \
REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
/*
*We enable active scan on these a case
*by case basis by regulatory domain
*/
/* 2G chan 12 - chan 13, PASSIV SCAN */
#define RTW_2GHZ_CH12_13 \
REG_RULE(2467-10, 2472+10, 40, 0, 20, \
NL80211_RRF_PASSIVE_SCAN)
/* 2G chan 14, PASSIVS SCAN, NO OFDM (B only) */
#define RTW_2GHZ_CH14 \
REG_RULE(2484-10, 2484+10, 40, 0, 20, \
NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM)
/* 5G chan 36 - chan 64 */
#define RTW_5GHZ_5150_5350 \
REG_RULE(5150-10, 5350+10, 80, 0, 30, \
NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
/* 5G chan 100 - chan 165 */
#define RTW_5GHZ_5470_5850 \
REG_RULE(5470-10, 5850+10, 80, 0, 30, \
NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
/* 5G chan 149 - chan 165 */
#define RTW_5GHZ_5725_5850 \
REG_RULE(5725-10, 5850+10, 80, 0, 30, \
NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
/* 5G chan 36 - chan 165 */
#define RTW_5GHZ_5150_5850 \
REG_RULE(5150-10, 5850+10, 80, 0, 30, \
NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
static const struct ieee80211_regdomain rtw_regdom_rd = {
.n_reg_rules = 4,
.alpha2 = "99",
.reg_rules = {
RTW_2GHZ_CH01_11,
RTW_2GHZ_CH12_13,
RTW_2GHZ_CH14,
RTW_5GHZ_5150_5850,
}
};
#if 0
static const struct ieee80211_regdomain rtw_regdom_11 = {
.n_reg_rules = 1,
.alpha2 = "99",
.reg_rules = {
RTW_2GHZ_CH01_11,
RTW_2GHZ_CH12_13
}
};
static const struct ieee80211_regdomain rtw_regdom_12_13 = {
.n_reg_rules = 2,
.alpha2 = "99",
.reg_rules = {
RTW_2GHZ_CH01_11,
RTW_2GHZ_CH12_13,
}
};
static const struct ieee80211_regdomain rtw_regdom_no_midband = {
.n_reg_rules = 3,
.alpha2 = "99",
.reg_rules = {
RTW_2GHZ_CH01_11,
RTW_5GHZ_5150_5350,
RTW_5GHZ_5725_5850,
}
};
static const struct ieee80211_regdomain rtw_regdom_60_64 = {
.n_reg_rules = 3,
.alpha2 = "99",
.reg_rules = {
RTW_2GHZ_CH01_11,
RTW_2GHZ_CH12_13,
RTW_5GHZ_5725_5850,
}
};
static const struct ieee80211_regdomain rtw_regdom_14_60_64 = {
.n_reg_rules = 4,
.alpha2 = "99",
.reg_rules = {
RTW_2GHZ_CH01_11,
RTW_2GHZ_CH12_13,
RTW_2GHZ_CH14,
RTW_5GHZ_5725_5850,
}
};
static const struct ieee80211_regdomain rtw_regdom_14 = {
.n_reg_rules = 3,
.alpha2 = "99",
.reg_rules = {
RTW_2GHZ_CH01_11,
RTW_2GHZ_CH12_13,
RTW_2GHZ_CH14,
}
};
#endif
#if 0
static struct rtw_regulatory *rtw_regd;
#endif
#if 0 /* not_yet */
static void _rtw_reg_apply_beaconing_flags(struct wiphy *wiphy,
enum nl80211_reg_initiator initiator)
{
enum nl80211_band band;
struct ieee80211_supported_band *sband;
const struct ieee80211_reg_rule *reg_rule;
struct ieee80211_channel *ch;
unsigned int i;
u32 bandwidth = 0;
int r;
for (band = 0; band < NUM_NL80211_BANDS; band++) {
if (!wiphy->bands[band])
continue;
sband = wiphy->bands[band];
for (i = 0; i < sband->n_channels; i++) {
ch = &sband->channels[i];
if (rtw_is_dfs_ch(ch->hw_value) ||
(ch->flags & IEEE80211_CHAN_RADAR))
continue;
if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
r = freq_reg_info(wiphy, ch->center_freq,
bandwidth, &reg_rule);
if (r)
continue;
/*
*If 11d had a rule for this channel ensure
*we enable adhoc/beaconing if it allows us to
*use it. Note that we would have disabled it
*by applying our static world regdomain by
*default during init, prior to calling our
*regulatory_hint().
*/
if (!(reg_rule->flags & NL80211_RRF_NO_IBSS))
ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
if (!
(reg_rule->flags &
NL80211_RRF_PASSIVE_SCAN))
ch->flags &=
~IEEE80211_CHAN_PASSIVE_SCAN;
} else {
if (ch->beacon_found)
ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
IEEE80211_CHAN_PASSIVE_SCAN);
}
}
}
}
/* Allows active scan scan on Ch 12 and 13 */
static void _rtw_reg_apply_active_scan_flags(struct wiphy *wiphy,
enum nl80211_reg_initiator
initiator)
{
struct ieee80211_supported_band *sband;
struct ieee80211_channel *ch;
const struct ieee80211_reg_rule *reg_rule;
u32 bandwidth = 0;
int r;
if (!wiphy->bands[NL80211_BAND_2GHZ])
return;
sband = wiphy->bands[NL80211_BAND_2GHZ];
/*
* If no country IE has been received always enable active scan
* on these channels. This is only done for specific regulatory SKUs
*/
if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
ch = &sband->channels[11]; /* CH 12 */
if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
ch = &sband->channels[12]; /* CH 13 */
if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
return;
}
/*
* If a country IE has been received check its rule for this
* channel first before enabling active scan. The passive scan
* would have been enforced by the initial processing of our
* custom regulatory domain.
*/
ch = &sband->channels[11]; /* CH 12 */
r = freq_reg_info(wiphy, ch->center_freq, bandwidth, &reg_rule);
if (!r) {
if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
}
ch = &sband->channels[12]; /* CH 13 */
r = freq_reg_info(wiphy, ch->center_freq, bandwidth, &reg_rule);
if (!r) {
if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
}
}
#endif
void rtw_regd_apply_flags(struct wiphy *wiphy)
{
struct dvobj_priv *dvobj = wiphy_to_dvobj(wiphy);
//struct rf_ctl_t *rfctl = dvobj_to_rfctl(dvobj);
//RT_CHANNEL_INFO *channel_set = rfctl->channel_set;
//u8 max_chan_nums = rfctl->max_chan_nums;
struct ieee80211_supported_band *sband;
struct ieee80211_channel *ch;
unsigned int i, j;
u16 channel;
//u32 freq;
/* all channels enable */
for (i = 0; i < NUM_NL80211_BANDS; i++) {
sband = wiphy->bands[i];
if (sband) {
for (j = 0; j < sband->n_channels; j++) {
ch = &sband->channels[j];
if (ch)
ch->flags &= ~(IEEE80211_CHAN_DISABLED|IEEE80211_CHAN_NO_HT40PLUS|
IEEE80211_CHAN_NO_HT40MINUS|IEEE80211_CHAN_NO_80MHZ|
IEEE80211_CHAN_NO_160MHZ|
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0))
IEEE80211_CHAN_NO_IBSS|IEEE80211_CHAN_PASSIVE_SCAN);
#else
IEEE80211_CHAN_NO_IR);
#endif
}
}
}
/* channels apply by channel plans. */
/*
for (i = 0; i < max_chan_nums; i++) {
channel = channel_set[i].ChannelNum;
freq = rtw_ch2freq(channel);
ch = ieee80211_get_channel(wiphy, freq);
if (!ch)
continue;
if (channel_set[i].ScanType == SCAN_PASSIVE
#if defined(CONFIG_DFS_MASTER)
&& rtw_odm_dfs_domain_unknown(dvobj)
#endif
) {
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0))
ch->flags = (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_PASSIVE_SCAN);
#else
ch->flags = IEEE80211_CHAN_NO_IR;
#endif
} else
ch->flags = 0;
#ifdef CONFIG_DFS
if (rtw_is_dfs_ch(ch->hw_value)
#if defined(CONFIG_DFS_MASTER)
&& rtw_odm_dfs_domain_unknown(dvobj)
#endif
) {
ch->flags |= IEEE80211_CHAN_RADAR;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0))
ch->flags |= (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_PASSIVE_SCAN);
#else
ch->flags |= IEEE80211_CHAN_NO_IR;
#endif
}
#endif CONFIG_DFS
}
*/
}
static const struct ieee80211_regdomain *_rtw_regdomain_select(struct
rtw_regulatory
*reg)
{
#if 0
switch (reg->country_code) {
case COUNTRY_CODE_USER:
default:
return &rtw_regdom_rd;
}
#else
return &rtw_regdom_rd;
#endif
}
static void rtw_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
{
switch (request->initiator) {
case NL80211_REGDOM_SET_BY_DRIVER:
RTW_INFO("%s: %s\n", __func__, "NL80211_REGDOM_SET_BY_DRIVER");
break;
case NL80211_REGDOM_SET_BY_CORE:
RTW_INFO("%s: %s\n", __func__, "NL80211_REGDOM_SET_BY_CORE");
break;
case NL80211_REGDOM_SET_BY_USER:
RTW_INFO("%s: %s alpha2:%c%c\n", __func__, "NL80211_REGDOM_SET_BY_USER"
, request->alpha2[0], request->alpha2[1]);
rtw_set_country(wiphy_to_adapter(wiphy), request->alpha2);
break;
case NL80211_REGDOM_SET_BY_COUNTRY_IE:
RTW_INFO("%s: %s\n", __func__, "NL80211_REGDOM_SET_BY_COUNTRY_IE");
break;
}
rtw_regd_apply_flags(wiphy);
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
static int rtw_reg_notifier_return(struct wiphy *wiphy, struct regulatory_request *request)
{
rtw_reg_notifier(wiphy, request);
return 0;
}
#endif
static void _rtw_regd_init_wiphy(struct rtw_regulatory *reg, struct wiphy *wiphy)
{
const struct ieee80211_regdomain *regd;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
wiphy->reg_notifier = rtw_reg_notifier_return;
#else
wiphy->reg_notifier = rtw_reg_notifier;
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0))
wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
wiphy->flags &= ~WIPHY_FLAG_STRICT_REGULATORY;
wiphy->flags &= ~WIPHY_FLAG_DISABLE_BEACON_HINTS;
#else
wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
wiphy->regulatory_flags &= ~REGULATORY_STRICT_REG;
wiphy->regulatory_flags &= ~REGULATORY_DISABLE_BEACON_HINTS;
#endif
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)) && (LINUX_VERSION_CODE < KERNEL_VERSION(6, 1, 39))
wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
#endif
regd = _rtw_regdomain_select(reg);
wiphy_apply_custom_regulatory(wiphy, regd);
rtw_regd_apply_flags(wiphy);
}
static struct country_code_to_enum_rd *_rtw_regd_find_country(u16 countrycode)
{
int i;
for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
if (allCountries[i].countrycode == countrycode)
return &allCountries[i];
}
return NULL;
}
int rtw_regd_init(struct wiphy *wiphy)
{
#if 0
if (rtw_regd == NULL) {
rtw_regd = (struct rtw_regulatory *)
rtw_malloc(sizeof(struct rtw_regulatory));
rtw_regd->alpha2[0] = '9';
rtw_regd->alpha2[1] = '9';
rtw_regd->country_code = COUNTRY_CODE_USER;
}
RTW_INFO("%s: Country alpha2 being used: %c%c\n",
__func__, rtw_regd->alpha2[0], rtw_regd->alpha2[1]);
#endif
_rtw_regd_init_wiphy(NULL, wiphy);
return 0;
}
#endif /* CONFIG_IOCTL_CFG80211 */
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