From: Anjaneyulu pagadala.yesu.anjaneyulu@intel.com
[ Upstream commit cf4bd1608882792d4742e27a819493312904a680 ]
Some regulatory bodies doesn't allow IR (initiate radioation) on a specific subband, but allows it for channels with a bandwidth of 20 MHz. Add a channel flag that indicates that, and consider it in cfg80211_reg_check_beaconing.
While on it, fix the kernel doc of enum nl80211_reg_rule_flags and change it to use BIT().
Signed-off-by: Anjaneyulu pagadala.yesu.anjaneyulu@intel.com Co-developed-by: Somashekhar Puttagangaiah somashekhar.puttagangaiah@intel.com Signed-off-by: Somashekhar Puttagangaiah somashekhar.puttagangaiah@intel.com Signed-off-by: Miri Korenblit miriam.rachel.korenblit@intel.com Link: https://patch.msgid.link/20250308225541.d3ab352a73ff.I8a8f79e1c9eb7493692946... [fix typo] Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- include/net/cfg80211.h | 3 +++ include/uapi/linux/nl80211.h | 52 ++++++++++++++++++++---------------- net/wireless/chan.c | 8 +++++- net/wireless/nl80211.c | 4 +++ net/wireless/reg.c | 4 ++- 5 files changed, 46 insertions(+), 25 deletions(-)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index c168b0e89b79d..b000f6a59a030 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -127,6 +127,8 @@ struct wiphy; * even if it is otherwise disabled. * @IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP: Allow using this channel for AP operation * with very low power (VLP), even if otherwise set to NO_IR. + * @IEEE80211_CHAN_ALLOW_20MHZ_ACTIVITY: Allow activity on a 20 MHz channel, + * even if otherwise set to NO_IR. */ enum ieee80211_channel_flags { IEEE80211_CHAN_DISABLED = BIT(0), @@ -155,6 +157,7 @@ enum ieee80211_channel_flags { IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT = BIT(23), IEEE80211_CHAN_CAN_MONITOR = BIT(24), IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP = BIT(25), + IEEE80211_CHAN_ALLOW_20MHZ_ACTIVITY = BIT(26), };
#define IEEE80211_CHAN_NO_HT40 \ diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index f6c1b181c886d..ea30fa455a098 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -4327,6 +4327,8 @@ enum nl80211_wmm_rule { * otherwise completely disabled. * @NL80211_FREQUENCY_ATTR_ALLOW_6GHZ_VLP_AP: This channel can be used for a * very low power (VLP) AP, despite being NO_IR. + * @NL80211_FREQUENCY_ATTR_ALLOW_20MHZ_ACTIVITY: This channel can be active in + * 20 MHz bandwidth, despite being NO_IR. * @NL80211_FREQUENCY_ATTR_MAX: highest frequency attribute number * currently defined * @__NL80211_FREQUENCY_ATTR_AFTER_LAST: internal use @@ -4371,6 +4373,7 @@ enum nl80211_frequency_attr { NL80211_FREQUENCY_ATTR_NO_6GHZ_AFC_CLIENT, NL80211_FREQUENCY_ATTR_CAN_MONITOR, NL80211_FREQUENCY_ATTR_ALLOW_6GHZ_VLP_AP, + NL80211_FREQUENCY_ATTR_ALLOW_20MHZ_ACTIVITY,
/* keep last */ __NL80211_FREQUENCY_ATTR_AFTER_LAST, @@ -4582,31 +4585,34 @@ enum nl80211_sched_scan_match_attr { * @NL80211_RRF_NO_6GHZ_AFC_CLIENT: Client connection to AFC AP not allowed * @NL80211_RRF_ALLOW_6GHZ_VLP_AP: Very low power (VLP) AP can be permitted * despite NO_IR configuration. + * @NL80211_RRF_ALLOW_20MHZ_ACTIVITY: Allow activity in 20 MHz bandwidth, + * despite NO_IR configuration. */ enum nl80211_reg_rule_flags { - NL80211_RRF_NO_OFDM = 1<<0, - NL80211_RRF_NO_CCK = 1<<1, - NL80211_RRF_NO_INDOOR = 1<<2, - NL80211_RRF_NO_OUTDOOR = 1<<3, - NL80211_RRF_DFS = 1<<4, - NL80211_RRF_PTP_ONLY = 1<<5, - NL80211_RRF_PTMP_ONLY = 1<<6, - NL80211_RRF_NO_IR = 1<<7, - __NL80211_RRF_NO_IBSS = 1<<8, - NL80211_RRF_AUTO_BW = 1<<11, - NL80211_RRF_IR_CONCURRENT = 1<<12, - NL80211_RRF_NO_HT40MINUS = 1<<13, - NL80211_RRF_NO_HT40PLUS = 1<<14, - NL80211_RRF_NO_80MHZ = 1<<15, - NL80211_RRF_NO_160MHZ = 1<<16, - NL80211_RRF_NO_HE = 1<<17, - NL80211_RRF_NO_320MHZ = 1<<18, - NL80211_RRF_NO_EHT = 1<<19, - NL80211_RRF_PSD = 1<<20, - NL80211_RRF_DFS_CONCURRENT = 1<<21, - NL80211_RRF_NO_6GHZ_VLP_CLIENT = 1<<22, - NL80211_RRF_NO_6GHZ_AFC_CLIENT = 1<<23, - NL80211_RRF_ALLOW_6GHZ_VLP_AP = 1<<24, + NL80211_RRF_NO_OFDM = 1 << 0, + NL80211_RRF_NO_CCK = 1 << 1, + NL80211_RRF_NO_INDOOR = 1 << 2, + NL80211_RRF_NO_OUTDOOR = 1 << 3, + NL80211_RRF_DFS = 1 << 4, + NL80211_RRF_PTP_ONLY = 1 << 5, + NL80211_RRF_PTMP_ONLY = 1 << 6, + NL80211_RRF_NO_IR = 1 << 7, + __NL80211_RRF_NO_IBSS = 1 << 8, + NL80211_RRF_AUTO_BW = 1 << 11, + NL80211_RRF_IR_CONCURRENT = 1 << 12, + NL80211_RRF_NO_HT40MINUS = 1 << 13, + NL80211_RRF_NO_HT40PLUS = 1 << 14, + NL80211_RRF_NO_80MHZ = 1 << 15, + NL80211_RRF_NO_160MHZ = 1 << 16, + NL80211_RRF_NO_HE = 1 << 17, + NL80211_RRF_NO_320MHZ = 1 << 18, + NL80211_RRF_NO_EHT = 1 << 19, + NL80211_RRF_PSD = 1 << 20, + NL80211_RRF_DFS_CONCURRENT = 1 << 21, + NL80211_RRF_NO_6GHZ_VLP_CLIENT = 1 << 22, + NL80211_RRF_NO_6GHZ_AFC_CLIENT = 1 << 23, + NL80211_RRF_ALLOW_6GHZ_VLP_AP = 1 << 24, + NL80211_RRF_ALLOW_20MHZ_ACTIVITY = 1 << 25, };
#define NL80211_RRF_PASSIVE_SCAN NL80211_RRF_NO_IR diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 9f918b77b40e2..4cdb74a3f38c6 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -6,7 +6,7 @@ * * Copyright 2009 Johannes Berg johannes@sipsolutions.net * Copyright 2013-2014 Intel Mobile Communications GmbH - * Copyright 2018-2024 Intel Corporation + * Copyright 2018-2025 Intel Corporation */
#include <linux/export.h> @@ -1497,6 +1497,12 @@ bool cfg80211_reg_check_beaconing(struct wiphy *wiphy, if (cfg->reg_power == IEEE80211_REG_VLP_AP) permitting_flags |= IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP;
+ if ((cfg->iftype == NL80211_IFTYPE_P2P_GO || + cfg->iftype == NL80211_IFTYPE_AP) && + (chandef->width == NL80211_CHAN_WIDTH_20_NOHT || + chandef->width == NL80211_CHAN_WIDTH_20)) + permitting_flags |= IEEE80211_CHAN_ALLOW_20MHZ_ACTIVITY; + return _cfg80211_reg_can_beacon(wiphy, chandef, cfg->iftype, check_no_ir ? IEEE80211_CHAN_NO_IR : 0, permitting_flags); diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index b457fe78672b7..370b668678da0 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -1234,6 +1234,10 @@ static int nl80211_msg_put_channel(struct sk_buff *msg, struct wiphy *wiphy, if ((chan->flags & IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP) && nla_put_flag(msg, NL80211_FREQUENCY_ATTR_ALLOW_6GHZ_VLP_AP)) goto nla_put_failure; + if ((chan->flags & IEEE80211_CHAN_ALLOW_20MHZ_ACTIVITY) && + nla_put_flag(msg, + NL80211_FREQUENCY_ATTR_ALLOW_20MHZ_ACTIVITY)) + goto nla_put_failure; }
if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER, diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 212e9561aae77..c1752b31734fa 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -5,7 +5,7 @@ * Copyright 2008-2011 Luis R. Rodriguez mcgrof@qca.qualcomm.com * Copyright 2013-2014 Intel Mobile Communications GmbH * Copyright 2017 Intel Deutschland GmbH - * Copyright (C) 2018 - 2024 Intel Corporation + * Copyright (C) 2018 - 2025 Intel Corporation * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above @@ -1603,6 +1603,8 @@ static u32 map_regdom_flags(u32 rd_flags) channel_flags |= IEEE80211_CHAN_PSD; if (rd_flags & NL80211_RRF_ALLOW_6GHZ_VLP_AP) channel_flags |= IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP; + if (rd_flags & NL80211_RRF_ALLOW_20MHZ_ACTIVITY) + channel_flags |= IEEE80211_CHAN_ALLOW_20MHZ_ACTIVITY; return channel_flags; }