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nl80211: advertise HT/VHT channel limitations
When drivers or regulatory have limitations on 40, 80 or 160 MHz channels, advertise these to userspace via nl80211. Also add a new feature flag to let userspace know this is supported. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
parent
c7a6ee27ab
commit
50640f1693
3 changed files with 31 additions and 1 deletions
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@ -2041,6 +2041,16 @@ enum nl80211_band_attr {
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* (enum nl80211_dfs_state)
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* @NL80211_FREQUENCY_ATTR_DFS_TIME: time in miliseconds for how long
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* this channel is in this DFS state.
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* @NL80211_FREQUENCY_ATTR_NO_HT40_MINUS: HT40- isn't possible with this
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* channel as the control channel
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* @NL80211_FREQUENCY_ATTR_NO_HT40_PLUS: HT40+ isn't possible with this
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* channel as the control channel
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* @NL80211_FREQUENCY_ATTR_NO_80MHZ: any 80 MHz channel using this channel
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* as the primary or any of the secondary channels isn't possible,
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* this includes 80+80 channels
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* @NL80211_FREQUENCY_ATTR_NO_160MHZ: any 160 MHz (but not 80+80) channel
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* using this channel as the primary or any of the secondary channels
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* isn't possible
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* @NL80211_FREQUENCY_ATTR_MAX: highest frequency attribute number
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* currently defined
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* @__NL80211_FREQUENCY_ATTR_AFTER_LAST: internal use
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@ -2055,6 +2065,10 @@ enum nl80211_frequency_attr {
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NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
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NL80211_FREQUENCY_ATTR_DFS_STATE,
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NL80211_FREQUENCY_ATTR_DFS_TIME,
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NL80211_FREQUENCY_ATTR_NO_HT40_MINUS,
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NL80211_FREQUENCY_ATTR_NO_HT40_PLUS,
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NL80211_FREQUENCY_ATTR_NO_80MHZ,
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NL80211_FREQUENCY_ATTR_NO_160MHZ,
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/* keep last */
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__NL80211_FREQUENCY_ATTR_AFTER_LAST,
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@ -3421,6 +3435,8 @@ enum nl80211_ap_sme_features {
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* Note that even for drivers that support this, the default is to add
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* stations in authenticated/associated state, so to add unauthenticated
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* stations the authenticated/associated bits have to be set in the mask.
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* @NL80211_FEATURE_ADVERTISE_CHAN_LIMITS: cfg80211 advertises channel limits
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* (HT40, VHT 80/160 MHz) if this flag is set
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*/
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enum nl80211_feature_flags {
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NL80211_FEATURE_SK_TX_STATUS = 1 << 0,
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@ -3437,6 +3453,7 @@ enum nl80211_feature_flags {
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NL80211_FEATURE_P2P_GO_CTWIN = 1 << 11,
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NL80211_FEATURE_P2P_GO_OPPPS = 1 << 12,
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NL80211_FEATURE_FULL_AP_CLIENT_STATE = 1 << 13,
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NL80211_FEATURE_ADVERTISE_CHAN_LIMITS = 1 << 14,
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};
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/**
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@ -367,7 +367,8 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
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rdev->wiphy.rts_threshold = (u32) -1;
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rdev->wiphy.coverage_class = 0;
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rdev->wiphy.features = NL80211_FEATURE_SCAN_FLUSH;
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rdev->wiphy.features = NL80211_FEATURE_SCAN_FLUSH |
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NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
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return &rdev->wiphy;
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}
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@ -562,6 +562,18 @@ static int nl80211_msg_put_channel(struct sk_buff *msg,
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if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME, time))
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goto nla_put_failure;
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}
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if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
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nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
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goto nla_put_failure;
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if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
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nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
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goto nla_put_failure;
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if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
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nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
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goto nla_put_failure;
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if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
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nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
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goto nla_put_failure;
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if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
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DBM_TO_MBM(chan->max_power)))
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