Return-path: Received: from he.sipsolutions.net ([78.46.109.217]:53283 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761190Ab3BMXsC (ORCPT ); Wed, 13 Feb 2013 18:48:02 -0500 From: Johannes Berg To: linux-wireless@vger.kernel.org Cc: mcgrof@do-not-panic.com, green@qca.qualcomm.com, Johannes Berg Subject: [PATCH v2 3/3] nl80211: advertise HT/VHT channel limitations Date: Thu, 14 Feb 2013 00:47:54 +0100 Message-Id: <1360799274-16088-4-git-send-email-johannes@sipsolutions.net> (sfid-20130214_004808_511448_9EA4FD50) In-Reply-To: <1360799274-16088-1-git-send-email-johannes@sipsolutions.net> References: <1360799274-16088-1-git-send-email-johannes@sipsolutions.net> Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Johannes Berg 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 --- include/uapi/linux/nl80211.h | 17 +++++++++++++++++ net/wireless/core.c | 3 ++- net/wireless/nl80211.c | 12 ++++++++++++ 3 files changed, 31 insertions(+), 1 deletion(-) 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))) -- 1.8.0