The prerequisite for MLO support in cfg80211/mac80211 is that all the links participating in MLO must be from the same wiphy/ieee80211_hw. To meet this expectation, some drivers may need to group multiple discrete hardware each acting as a link in MLO under single wiphy. With this series, the bands and supported frequencies of each individual radio are reported to user space. This allows user space to figure out the limitations of what combination of channels can be used concurrently. Each mac80211 channel context is assigned to a radio based on radio specific frequency ranges and interface combinations. This is loosely based on Karthikeyan Periyasamy's series "[PATCH 00/13] wifi: Add multi physical hardware iface combination support" with some differences: - a struct wiphy_radio is defined, which holds the frequency ranges and a full struct ieee80211_iface_combination array - a channel context is explicitly assigned to a radio when created - both global and per-radio interface combination limits are checked and enforced on channel context assignment Changes since RFC v2: - fix uninitialized variables - fix multiple radios with DFS - add support for per-radio beacon interval checking Changes since RFC: - replace static per-radio number of channels limit with full ifcomb checks - remove band bitmask in favor of only using freq ranges Felix Fietkau (8): wifi: nl80211: split helper function from nl80211_put_iface_combinations wifi: cfg80211: add support for advertising multiple radios belonging to a wiphy wifi: cfg80211: extend interface combination check for multi-radio wifi: mac80211: add support for DFS with multiple radios wifi: mac80211: add radio index to ieee80211_chanctx_conf wifi: mac80211: extend ifcomb check functions for multi-radio wifi: mac80211: move code in ieee80211_link_reserve_chanctx to a helper wifi: mac80211: add wiphy radio assignment and validation include/net/cfg80211.h | 43 +++++++- include/net/mac80211.h | 2 +- include/uapi/linux/nl80211.h | 48 ++++++++- net/mac80211/cfg.c | 7 +- net/mac80211/chan.c | 228 +++++++++++++++++++++++------------- net/mac80211/ibss.c | 2 +- net/mac80211/ieee80211_i.h | 6 +- net/mac80211/iface.c | 2 +- net/mac80211/main.c | 32 +++-- net/mac80211/util.c | 131 +++++++++++++++------ net/wireless/nl80211.c | 190 +++++++++++++++++++++--------- net/wireless/rdev-ops.h | 17 +++- net/wireless/trace.h | 5 +- net/wireless/util.c | 36 ++++-- 14 files changed, 560 insertions(+), 189 deletions(-) base-commit: 5bcd9a0a59953b5ff55ac226f903397319bf7f40 -- git-series 0.9.1
