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Felix Fietkau
6b7b98627b
Add hardware airtime fairness (ATF) support, using the MAC's weighted DWRR scheduler (VoW) to balance TX airtime between stations. This supplements mac80211's software airtime fairness rather than replacing it: software ATF keeps scheduling the host TX queues, while the hardware scheduler enforces fairness on the offloaded path where the host has no airtime accounting, such as when WED is active. It is enabled by default on mt7916 and newer chipsets; mt7915 is excluded. A station's TX airtime weight is taken from mac80211 through the sta_set_airtime_weight op and applied to the hardware scheduler directly; the per-AC DWRR quantum levels are derived from it on the fly, mapping the weight logarithmically onto the global hardware quantum table. ATF and WATF are enabled by default and can be toggled together at runtime through the "vow_atf" debugfs file. Signed-off-by: Lian Chen <[email protected]> Signed-off-by: Benjamin Lin <[email protected]> Signed-off-by: Felix Fietkau <[email protected]>