diff options
| -rw-r--r-- | include/net/cfg80211.h | 12 | ||||
| -rw-r--r-- | net/wireless/chan.c | 13 | ||||
| -rw-r--r-- | net/wireless/reg.c | 8 |
3 files changed, 32 insertions, 1 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index ee11a3db730b..8a9200f2f4a4 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -100,6 +100,16 @@ enum ieee80211_band { * @IEEE80211_CHAN_NO_HT40MINUS: extension channel below this channel * is not permitted. * @IEEE80211_CHAN_NO_OFDM: OFDM is not allowed on this channel. + * @IEEE80211_CHAN_NO_80MHZ: If the driver supports 80 MHz on the band, + * this flag indicates that an 80 MHz channel cannot use this + * channel as the control or any of the secondary channels. + * This may be due to the driver or due to regulatory bandwidth + * restrictions. + * @IEEE80211_CHAN_NO_160MHZ: If the driver supports 160 MHz on the band, + * this flag indicates that an 160 MHz channel cannot use this + * channel as the control or any of the secondary channels. + * This may be due to the driver or due to regulatory bandwidth + * restrictions. */ enum ieee80211_channel_flags { IEEE80211_CHAN_DISABLED = 1<<0, @@ -109,6 +119,8 @@ enum ieee80211_channel_flags { IEEE80211_CHAN_NO_HT40PLUS = 1<<4, IEEE80211_CHAN_NO_HT40MINUS = 1<<5, IEEE80211_CHAN_NO_OFDM = 1<<6, + IEEE80211_CHAN_NO_80MHZ = 1<<7, + IEEE80211_CHAN_NO_160MHZ = 1<<8, }; #define IEEE80211_CHAN_NO_HT40 \ diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 810c23cfb894..fd556ac05fdb 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -375,6 +375,7 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy, case NL80211_CHAN_WIDTH_80: if (!vht_cap->vht_supported) return false; + prohibited_flags |= IEEE80211_CHAN_NO_80MHZ; width = 80; break; case NL80211_CHAN_WIDTH_160: @@ -382,6 +383,7 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy, return false; if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)) return false; + prohibited_flags |= IEEE80211_CHAN_NO_160MHZ; width = 160; break; default: @@ -389,7 +391,16 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy, return false; } - /* TODO: missing regulatory check on 80/160 bandwidth */ + /* + * TODO: What if there are only certain 80/160/80+80 MHz channels + * allowed by the driver, or only certain combinations? + * For 40 MHz the driver can set the NO_HT40 flags, but for + * 80/160 MHz and in particular 80+80 MHz this isn't really + * feasible and we only have NO_80MHZ/NO_160MHZ so far but + * no way to cover 80+80 MHz or more complex restrictions. + * Note that such restrictions also need to be advertised to + * userspace, for example for P2P channel selection. + */ if (width > 20) prohibited_flags |= IEEE80211_CHAN_NO_OFDM; diff --git a/net/wireless/reg.c b/net/wireless/reg.c index e97d5b071ab6..93ab840957a0 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -866,6 +866,10 @@ static void handle_channel(struct wiphy *wiphy, if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) bw_flags = IEEE80211_CHAN_NO_HT40; + if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) + bw_flags |= IEEE80211_CHAN_NO_80MHZ; + if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) + bw_flags |= IEEE80211_CHAN_NO_160MHZ; if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && request_wiphy && request_wiphy == wiphy && @@ -1264,6 +1268,10 @@ static void handle_channel_custom(struct wiphy *wiphy, if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) bw_flags = IEEE80211_CHAN_NO_HT40; + if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) + bw_flags |= IEEE80211_CHAN_NO_80MHZ; + if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) + bw_flags |= IEEE80211_CHAN_NO_160MHZ; chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |