kernel/linux.git/net/wireless/chan.c, branch v7.1

wifi: cfg80211: add support for NAN data interface

2026-03-25T19:56:53+00:00

This new interface type represents a NAN data interface (NDI). It is used for data communication with NAN peers. Note that the existing NL80211_IFTYPE_NAN interface, which is the NAN Management Interface (NMI), is used for management communication. An NDI interface is started when a new NAN data path is about to be established, and is stopped after the NAN data path is terminated. - An NDI interface can only be started if the NMI is running, and NAN is started. - Before the NMI is stopped, the NDI interfaces will be stopped. Add the new interface type, handle add/remove operations for it, and makes sure of the conditions above. Signed-off-by: Miri Korenblit Link: https://patch.msgid.link/20260219114327.0d681335c2e2.I92973483e927820ae2297853c141842fdb262747@changeid Link: https://patch.msgid.link/20260318123926.206536-4-miriam.rachel.korenblit@intel.com Signed-off-by: Johannes Berg

wifi: cfg80211: Add support for additional 7 GHz channels

2026-03-24T15:29:49+00:00

Add support for channels 237, 241, 245, 249, 253 and support for additional 320 MHz segment. Signed-off-by: Ilan Peer Signed-off-by: Miri Korenblit Link: https://patch.msgid.link/20260323230242.072942e8e55a.I20eba7b534c6402d5e55f862865ff1e6fef64d83@changeid Signed-off-by: Johannes Berg

wifi: cfg80211: check non-S1G width with S1G chandef

2026-03-13T06:14:26+00:00

It is not valid to have an S1G chandef with a non-S1G width. Enforce this during chandef validation. Signed-off-by: Lachlan Hodges Link: https://patch.msgid.link/20260312045804.362974-4-lachlan.hodges@morsemicro.com Signed-off-by: Johannes Berg

wifi: cfg80211: restrict cfg80211_chandef_create() to only HT-based bands

2026-03-13T06:14:26+00:00

cfg80211_chandef_create() should only be used by bands that are HT-based and the chantype argument makes sense. Insert a WARN such that it isn't used on 60GHz and S1GHz bands and to catch any potential existing uses by those bands. Suggested-by: Johannes Berg Signed-off-by: Lachlan Hodges Link: https://patch.msgid.link/20260312045804.362974-3-lachlan.hodges@morsemicro.com Signed-off-by: Johannes Berg

wifi: cfg80211: split control freq check from chandef check

2026-03-13T06:11:14+00:00

In order to introduce NPCA later, split the control frequency check out of cfg80211_chandef_valid(). Link: https://patch.msgid.link/20260303152641.11b31e4878a7.I534669506008e12ffcd6c115161777e528fdc838@changeid Signed-off-by: Johannes Berg

wifi: nl80211: don't allow DFS channels for NAN

2026-03-02T08:23:11+00:00

NAN cannot use DFS channels. Mark DFS channels as unusable if the chandef is to be used for NAN. Reviewed-by: Johannes Berg Signed-off-by: Miri Korenblit Link: https://patch.msgid.link/20260108102921.c2a5a0a14b9f.Idca29fb8a235df980e63b733a298fd1f2bdf2f48@changeid Signed-off-by: Miri Korenblit Link: https://patch.msgid.link/20260219094725.3846371-3-miriam.rachel.korenblit@intel.com Signed-off-by: Johannes Berg

wifi: cfg80211: set and report chandef CAC ongoing

2026-03-02T08:10:28+00:00

Allow to track and check CAC state from user mode by simple check phy channels eg. using iw phy1 channels command. This is done for regular CAC and background CAC. It is important for background CAC while we can start it from any app (eg. iw or hostapd). Signed-off-by: Janusz Dziedzic Link: https://patch.msgid.link/20260206171830.553879-3-janusz.dziedzic@gmail.com Signed-off-by: Johannes Berg

wifi: cfg80211: correctly implement and validate S1G chandef

2025-09-19T09:55:56+00:00

Currently, the S1G channelisation implementation differs from that of VHT, which is the PHY that S1G is based on. The major difference between the clock rate is 1/10th of VHT. However how their channelisation is represented within cfg80211 and mac80211 vastly differ. To rectify this, remove the use of IEEE80211_CHAN_1/2/4.. flags that were previously used to indicate the control channel width, however it should be implied that the control channels are 1MHz in the case of S1G. Additionally, introduce the invert - being IEEE80211_CHAN_NO_4/8/16MHz - that imply the control channel may not be used for a certain bandwidth. With these new flags, we can perform regulatory and chandef validation just as we would for VHT. To deal with the notion that S1G PHYs may contain a 2MHz primary channel, introduce a new variable, s1g_primary_2mhz, which indicates whether we are operating on a 2MHz primary channel. In this case, the chandef::chan points to the 1MHz primary channel pointed to by the primary channel location. Alongside this, introduce some new helper routines that can extract the sibling 1MHz channel. The sibling being the alternate 1MHz primary subchannel within the 2MHz primary channel that is not pointed to by chandef::chan. Furthermore, due to unique restrictions imposed on S1G PHYs, introduce a new flag, IEEE80211_CHAN_S1G_NO_PRIMARY, which states that the 1MHz channel cannot be used as a primary channel. This is assumed to be set by vendors as it is hardware and regdom specific, When we validate a 2MHz primary channel, we need to ensure both 1MHz subchannels do not contain this flag. If one or both of the 1MHz subchannels contain this flag then the 2MHz primary is not permitted for use as a primary channel. Properly integrate S1G channel validation such that it is implemented according with other PHY types such as VHT. Additionally, implement a new S1G-specific regulatory flag to allow cfg80211 to understand specific vendor requirements for S1G PHYs. Signed-off-by: Arien Judge Signed-off-by: Andrew Pope Signed-off-by: Lachlan Hodges Link: https://patch.msgid.link/20250918051913.500781-2-lachlan.hodges@morsemicro.com [remove redundant NL80211_ATTR_S1G_PRIMARY_2MHZ check] Signed-off-by: Johannes Berg

wifi: cfg80211: expose cfg80211_chandef_get_width()

2025-03-12T08:50:24+00:00

This can be just a trivial inline, to simplify some code. Expose it, and also use it in util.c where it wasn't previously available. Reviewed-by: Miriam Rachel Korenblit Link: https://patch.msgid.link/20250311122534.c5c3b4af9a74.Ib25cf60f634dc359961182113214e5cdc3504e9c@changeid Signed-off-by: Johannes Berg

wifi: cfg80211: allow IR in 20 MHz configurations

2025-03-11T09:53:01+00:00

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 Co-developed-by: Somashekhar Puttagangaiah Signed-off-by: Somashekhar Puttagangaiah Signed-off-by: Miri Korenblit Link: https://patch.msgid.link/20250308225541.d3ab352a73ff.I8a8f79e1c9eb74936929463960ee2a324712fe51@changeid [fix typo] Signed-off-by: Johannes Berg