diff options
author | Johannes Berg <johannes.berg@intel.com> | 2012-12-12 16:59:39 (GMT) |
---|---|---|
committer | Johannes Berg <johannes.berg@intel.com> | 2013-02-15 08:41:38 (GMT) |
commit | 50640f169372b9977487a328dedf13a8debedff7 (patch) | |
tree | 5ee6bf0cc8d936441049e94d48f7773a5fbdd420 | |
parent | c7a6ee27abd46247c1c7edfc49fb935138da7875 (diff) | |
download | linux-50640f169372b9977487a328dedf13a8debedff7.tar.xz |
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>
-rw-r--r-- | include/uapi/linux/nl80211.h | 17 | ||||
-rw-r--r-- | net/wireless/core.c | 3 | ||||
-rw-r--r-- | net/wireless/nl80211.c | 12 |
3 files changed, 31 insertions, 1 deletions
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_band_attr { * (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 @@ enum nl80211_frequency_attr { 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 @@ enum nl80211_ap_sme_features { * 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 @@ enum nl80211_feature_flags { 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, }; /** diff --git a/net/wireless/core.c b/net/wireless/core.c index 9220021..33b75b9 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -367,7 +367,8 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) rdev->wiphy.rts_threshold = (u32) -1; rdev->wiphy.coverage_class = 0; - rdev->wiphy.features = NL80211_FEATURE_SCAN_FLUSH; + rdev->wiphy.features = NL80211_FEATURE_SCAN_FLUSH | + NL80211_FEATURE_ADVERTISE_CHAN_LIMITS; return &rdev->wiphy; } diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index c1e18cc..7e40b9e 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -562,6 +562,18 @@ static int nl80211_msg_put_channel(struct sk_buff *msg, if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME, time)) goto nla_put_failure; } + if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) && + nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS)) + goto nla_put_failure; + if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) && + nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS)) + goto nla_put_failure; + if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) && + nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ)) + goto nla_put_failure; + if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) && + nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ)) + goto nla_put_failure; if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER, DBM_TO_MBM(chan->max_power))) |