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>
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 90b7af8..3880f6a 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2041,6 +2041,16 @@
* (enum nl80211_dfs_state)
* @NL80211_FREQUENCY_ATTR_DFS_TIME: time in miliseconds for how long
* this channel is in this DFS state.
+ * @NL80211_FREQUENCY_ATTR_NO_HT40_MINUS: HT40- isn't possible with this
+ * channel as the control channel
+ * @NL80211_FREQUENCY_ATTR_NO_HT40_PLUS: HT40+ isn't possible with this
+ * channel as the control channel
+ * @NL80211_FREQUENCY_ATTR_NO_80MHZ: any 80 MHz channel using this channel
+ * as the primary or any of the secondary channels isn't possible,
+ * this includes 80+80 channels
+ * @NL80211_FREQUENCY_ATTR_NO_160MHZ: any 160 MHz (but not 80+80) channel
+ * using this channel as the primary or any of the secondary channels
+ * isn't possible
* @NL80211_FREQUENCY_ATTR_MAX: highest frequency attribute number
* currently defined
* @__NL80211_FREQUENCY_ATTR_AFTER_LAST: internal use
@@ -2055,6 +2065,10 @@
NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
NL80211_FREQUENCY_ATTR_DFS_STATE,
NL80211_FREQUENCY_ATTR_DFS_TIME,
+ NL80211_FREQUENCY_ATTR_NO_HT40_MINUS,
+ NL80211_FREQUENCY_ATTR_NO_HT40_PLUS,
+ NL80211_FREQUENCY_ATTR_NO_80MHZ,
+ NL80211_FREQUENCY_ATTR_NO_160MHZ,
/* keep last */
__NL80211_FREQUENCY_ATTR_AFTER_LAST,
@@ -3421,6 +3435,8 @@
* Note that even for drivers that support this, the default is to add
* stations in authenticated/associated state, so to add unauthenticated
* stations the authenticated/associated bits have to be set in the mask.
+ * @NL80211_FEATURE_ADVERTISE_CHAN_LIMITS: cfg80211 advertises channel limits
+ * (HT40, VHT 80/160 MHz) if this flag is set
*/
enum nl80211_feature_flags {
NL80211_FEATURE_SK_TX_STATUS = 1 << 0,
@@ -3437,6 +3453,7 @@
NL80211_FEATURE_P2P_GO_CTWIN = 1 << 11,
NL80211_FEATURE_P2P_GO_OPPPS = 1 << 12,
NL80211_FEATURE_FULL_AP_CLIENT_STATE = 1 << 13,
+ NL80211_FEATURE_ADVERTISE_CHAN_LIMITS = 1 << 14,
};
/**