Return-path: Received: from nick.hrz.tu-chemnitz.de ([134.109.228.11]:49846 "EHLO nick.hrz.tu-chemnitz.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751650Ab3GIS1O (ORCPT ); Tue, 9 Jul 2013 14:27:14 -0400 From: Simon Wunderlich To: Johannes Berg Cc: linux-wireless@vger.kernel.org, Mathias Kretschmer , Simon Wunderlich Subject: [PATCHv4 3/5] mac80211: allow chanctx to change channels Date: Tue, 9 Jul 2013 20:27:02 +0200 Message-Id: <1373394424-23298-4-git-send-email-siwu@hrz.tu-chemnitz.de> (sfid-20130709_202720_889987_D467082E) In-Reply-To: <1373394424-23298-1-git-send-email-siwu@hrz.tu-chemnitz.de> References: <1373394424-23298-1-git-send-email-siwu@hrz.tu-chemnitz.de> Sender: linux-wireless-owner@vger.kernel.org List-ID: This adds mac80211/chanctx code to allow to change a channel definition of an active channel context. This will be used for the channel switch command added later. Signed-off-by: Simon Wunderlich Signed-off-by: Mathias Kretschmer --- include/net/mac80211.h | 4 ++++ net/mac80211/chan.c | 55 ++++++++++++++++++++++++++++++++++++++++++++ net/mac80211/ieee80211_i.h | 4 ++++ 3 files changed, 63 insertions(+) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 3124036..2cc306c 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -152,11 +152,13 @@ struct ieee80211_low_level_stats { * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed + * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel */ enum ieee80211_chanctx_change { IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), + IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3) }; /** @@ -222,6 +224,7 @@ struct ieee80211_chanctx_conf { * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed, * note that this is only called when it changes after the channel * context had been assigned. + * @BSS_CHANGED_CHANNEL: The operating channel of this interface changed. */ enum ieee80211_bss_change { BSS_CHANGED_ASSOC = 1<<0, @@ -246,6 +249,7 @@ enum ieee80211_bss_change { BSS_CHANGED_P2P_PS = 1<<19, BSS_CHANGED_BEACON_INFO = 1<<20, BSS_CHANGED_BANDWIDTH = 1<<21, + BSS_CHANGED_CHANNEL = 1<<22, /* when adding here, make sure to change ieee80211_reconfig */ }; diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index 03e8d2e..7816703 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -410,6 +410,61 @@ int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, return ret; } +int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, + const struct cfg80211_chan_def *chandef, + u32 *changed) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_chanctx_conf *conf; + struct ieee80211_chanctx *ctx; + int ret; + u32 chanctx_changed = 0; + + if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, + IEEE80211_CHAN_DISABLED)) + return -EINVAL; + + mutex_lock(&local->chanctx_mtx); + conf = rcu_dereference_protected(sdata->vif.chanctx_conf, + lockdep_is_held(&local->chanctx_mtx)); + if (!conf) { + ret = -EINVAL; + goto out; + } + + ctx = container_of(conf, struct ieee80211_chanctx, conf); + if (ctx->refcount != 1) { + ret = -EINVAL; + goto out; + } + + if (sdata->vif.bss_conf.chandef.width != chandef->width) { + chanctx_changed = IEEE80211_CHANCTX_CHANGE_WIDTH; + *changed |= BSS_CHANGED_BANDWIDTH; + } + + sdata->vif.bss_conf.chandef = *chandef; + ctx->conf.def = *chandef; + + chanctx_changed |= IEEE80211_CHANCTX_CHANGE_CHANNEL; + *changed |= BSS_CHANGED_CHANNEL; + drv_change_chanctx(local, ctx, chanctx_changed); + + if (!local->use_chanctx) { + local->_oper_chandef = *chandef; + ieee80211_hw_config(local, 0); + } + + ieee80211_recalc_chanctx_chantype(local, ctx); + ieee80211_recalc_smps_chanctx(local, ctx); + ieee80211_recalc_radar_chanctx(local, ctx); + + ret = 0; + out: + mutex_unlock(&local->chanctx_mtx); + return ret; +} + int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, const struct cfg80211_chan_def *chandef, u32 *changed) diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 23a191b..20dbc2d 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1658,6 +1658,10 @@ int __must_check ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, const struct cfg80211_chan_def *chandef, u32 *changed); +int __must_check +ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, + const struct cfg80211_chan_def *chandef, + u32 *changed); void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata); void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata); void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, -- 1.7.10.4