mac80211: Use a cfg80211_chan_def in ieee80211_hw_conf_chan

Drivers that don't use chanctxes cannot perform VHT association because
they still use a "backward compatibility" pair of {ieee80211_channel,
nl80211_channel_type} in ieee80211_conf and ieee80211_local.

Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
[fix kernel-doc]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

9 files changed, 83 insertions, 71 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 50aaf25..6e43feb 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -805,8 +805,7 @@ static int ieee80211_set_monitor_channel(struct wiphy *wiphy,
 					IEEE80211_CHANCTX_EXCLUSIVE);
 		}
 	} else if (local->open_count == local->monitors) {
-		local->_oper_channel = chandef->chan;
-		local->_oper_channel_type = cfg80211_get_chandef_type(chandef);
+		local->_oper_chandef = *chandef;
 		ieee80211_hw_config(local, 0);
 	}
 
@@ -3373,9 +3372,7 @@ static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
 		if (local->use_chanctx)
 			*chandef = local->monitor_chandef;
 		else
-			cfg80211_chandef_create(chandef,
-						local->_oper_channel,
-						local->_oper_channel_type);
+			*chandef = local->_oper_chandef;
 		ret = 0;
 	}
 	rcu_read_unlock();
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index 78c0d90..8024874 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -22,7 +22,7 @@ static void ieee80211_change_chanctx(struct ieee80211_local *local,
 	drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH);
 
 	if (!local->use_chanctx) {
-		local->_oper_channel_type = cfg80211_get_chandef_type(chandef);
+		local->_oper_chandef = *chandef;
 		ieee80211_hw_config(local, 0);
 	}
 }
@@ -77,9 +77,7 @@ ieee80211_new_chanctx(struct ieee80211_local *local,
 	ctx->mode = mode;
 
 	if (!local->use_chanctx) {
-		local->_oper_channel_type =
-			cfg80211_get_chandef_type(chandef);
-		local->_oper_channel = chandef->chan;
+		local->_oper_chandef = *chandef;
 		ieee80211_hw_config(local, 0);
 	} else {
 		err = drv_add_chanctx(local, ctx);
@@ -106,7 +104,10 @@ static void ieee80211_free_chanctx(struct ieee80211_local *local,
 	WARN_ON_ONCE(ctx->refcount != 0);
 
 	if (!local->use_chanctx) {
-		local->_oper_channel_type = NL80211_CHAN_NO_HT;
+		struct cfg80211_chan_def *chandef = &local->_oper_chandef;
+		chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
+		chandef->center_freq1 = chandef->chan->center_freq;
+		chandef->center_freq2 = 0;
 		ieee80211_hw_config(local, 0);
 	} else {
 		drv_remove_chanctx(local, ctx);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index c7f8b8b..f9782f0 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1021,8 +1021,7 @@ struct ieee80211_local {
 	struct ieee80211_sub_if_data __rcu *scan_sdata;
 	struct ieee80211_channel *csa_channel;
 	/* For backward compatibility only -- do not use */
-	struct ieee80211_channel *_oper_channel;
-	enum nl80211_channel_type _oper_channel_type;
+	struct cfg80211_chan_def _oper_chandef;
 
 	/* Temporary remain-on-channel for off-channel operations */
 	struct ieee80211_channel *tmp_channel;
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index b0d2868..a16b037 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -95,42 +95,47 @@ static void ieee80211_reconfig_filter(struct work_struct *work)
 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
 {
 	struct ieee80211_sub_if_data *sdata;
-	struct ieee80211_channel *chan;
+	struct cfg80211_chan_def chandef = {};
 	u32 changed = 0;
 	int power;
-	enum nl80211_channel_type channel_type;
 	u32 offchannel_flag;
 
 	offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
+
 	if (local->scan_channel) {
-		chan = local->scan_channel;
+		chandef.chan = local->scan_channel;
 		/* If scanning on oper channel, use whatever channel-type
 		 * is currently in use.
 		 */
-		if (chan == local->_oper_channel)
-			channel_type = local->_oper_channel_type;
-		else
-			channel_type = NL80211_CHAN_NO_HT;
+		if (chandef.chan == local->_oper_chandef.chan) {
+			chandef = local->_oper_chandef;
+		} else {
+			chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
+			chandef.center_freq1 = chandef.chan->center_freq;
+		}
 	} else if (local->tmp_channel) {
-		chan = local->tmp_channel;
-		channel_type = NL80211_CHAN_NO_HT;
-	} else {
-		chan = local->_oper_channel;
-		channel_type = local->_oper_channel_type;
-	}
-
-	if (chan != local->_oper_channel ||
-	    channel_type != local->_oper_channel_type)
+		chandef.chan = local->tmp_channel;
+		chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
+		chandef.center_freq1 = chandef.chan->center_freq;
+	} else
+		chandef = local->_oper_chandef;
+
+	WARN(!cfg80211_chandef_valid(&chandef),
+	     "control:%d MHz width:%d center: %d/%d MHz",
+	     chandef.chan->center_freq, chandef.width,
+	     chandef.center_freq1, chandef.center_freq2);
+
+	if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 		local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 	else
 		local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 
 	offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 
-	if (offchannel_flag || chan != local->hw.conf.channel ||
-	    channel_type != local->hw.conf.channel_type) {
-		local->hw.conf.channel = chan;
-		local->hw.conf.channel_type = channel_type;
+	if (offchannel_flag ||
+	    !cfg80211_chandef_identical(&local->hw.conf.chandef,
+					&local->_oper_chandef)) {
+		local->hw.conf.chandef = chandef;
 		changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 	}
 
@@ -146,7 +151,7 @@ static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
 		changed |= IEEE80211_CONF_CHANGE_SMPS;
 	}
 
-	power = chan->max_power;
+	power = chandef.chan->max_power;
 
 	rcu_read_lock();
 	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
@@ -740,11 +745,15 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 		sband = local->hw.wiphy->bands[band];
 		if (!sband)
 			continue;
-		if (!local->use_chanctx && !local->_oper_channel) {
+		if (!local->use_chanctx && !local->_oper_chandef.chan) {
 			/* init channel we're on */
-			local->hw.conf.channel =
-			local->_oper_channel = &sband->channels[0];
-			local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
+			struct cfg80211_chan_def chandef = {
+				.chan = &sband->channels[0],
+				.width = NL80211_CHAN_NO_HT,
+				.center_freq1 = sband->channels[0].center_freq,
+				.center_freq2 = 0
+			};
+			local->hw.conf.chandef = local->_oper_chandef = chandef;
 		}
 		cfg80211_chandef_create(&local->monitor_chandef,
 					&sband->channels[0],
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 9958cb7..237e2ef 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -988,6 +988,7 @@ static void ieee80211_chswitch_work(struct work_struct *work)
 {
 	struct ieee80211_sub_if_data *sdata =
 		container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
+	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 
 	if (!ieee80211_sdata_running(sdata))
@@ -997,21 +998,30 @@ static void ieee80211_chswitch_work(struct work_struct *work)
 	if (!ifmgd->associated)
 		goto out;
 
-	sdata->local->_oper_channel = sdata->local->csa_channel;
-	if (!sdata->local->ops->channel_switch) {
+	/*
+	 * FIXME: Here we are downgrading to NL80211_CHAN_WIDTH_20_NOHT
+	 * and don't adjust our ht/vht settings
+	 * This is wrong - we should behave according to the CSA params
+	 */
+	local->_oper_chandef.chan = local->csa_channel;
+	local->_oper_chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
+	local->_oper_chandef.center_freq1 =
+		local->_oper_chandef.chan->center_freq;
+	local->_oper_chandef.center_freq2 = 0;
+
+	if (!local->ops->channel_switch) {
 		/* call "hw_config" only if doing sw channel switch */
-		ieee80211_hw_config(sdata->local,
-			IEEE80211_CONF_CHANGE_CHANNEL);
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 	} else {
 		/* update the device channel directly */
-		sdata->local->hw.conf.channel = sdata->local->_oper_channel;
+		local->hw.conf.chandef = local->_oper_chandef;
 	}
 
 	/* XXX: shouldn't really modify cfg80211-owned data! */
-	ifmgd->associated->channel = sdata->local->_oper_channel;
+	ifmgd->associated->channel = local->_oper_chandef.chan;
 
 	/* XXX: wait for a beacon first? */
-	ieee80211_wake_queues_by_reason(&sdata->local->hw,
+	ieee80211_wake_queues_by_reason(&local->hw,
 					IEEE80211_MAX_QUEUE_MAP,
 					IEEE80211_QUEUE_STOP_REASON_CSA);
  out:
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index cb34cbb..581764f 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -384,7 +384,7 @@ static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
 {
 	int i;
 	struct ieee80211_sub_if_data *sdata;
-	enum ieee80211_band band = local->hw.conf.channel->band;
+	enum ieee80211_band band = local->hw.conf.chandef.chan->band;
 	u32 tx_flags;
 
 	tx_flags = IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
@@ -401,7 +401,7 @@ static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
 			local->scan_req->ssids[i].ssid_len,
 			local->scan_req->ie, local->scan_req->ie_len,
 			local->scan_req->rates[band], false,
-			tx_flags, local->hw.conf.channel, true);
+			tx_flags, local->hw.conf.chandef.chan, true);
 
 	/*
 	 * After sending probe requests, wait for probe responses
@@ -467,7 +467,7 @@ static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,
 	if (local->ops->hw_scan) {
 		__set_bit(SCAN_HW_SCANNING, &local->scanning);
 	} else if ((req->n_channels == 1) &&
-		   (req->channels[0] == local->_oper_channel)) {
+		   (req->channels[0] == local->_oper_chandef.chan)) {
 		/*
 		 * If we are scanning only on the operating channel
 		 * then we do not need to stop normal activities
diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index d79e374..8286dce 100644
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -28,27 +28,27 @@
 #define VIF_PR_FMT	" vif:%s(%d%s)"
 #define VIF_PR_ARG	__get_str(vif_name), __entry->vif_type, __entry->p2p ? "/p2p" : ""
 
-#define CHANDEF_ENTRY	__field(u32, control_freq)				\
-			__field(u32, chan_width)				\
-			__field(u32, center_freq1)				\
+#define CHANDEF_ENTRY	__field(u32, control_freq)					\
+			__field(u32, chan_width)					\
+			__field(u32, center_freq1)					\
 			__field(u32, center_freq2)
-#define CHANDEF_ASSIGN(c)							\
-			__entry->control_freq = (c)->chan->center_freq;		\
-			__entry->chan_width = (c)->width;			\
-			__entry->center_freq1 = (c)->center_freq1;		\
+#define CHANDEF_ASSIGN(c)								\
+			__entry->control_freq = (c)->chan ? (c)->chan->center_freq : 0;	\
+			__entry->chan_width = (c)->width;				\
+			__entry->center_freq1 = (c)->center_freq1;			\
 			__entry->center_freq2 = (c)->center_freq2;
 #define CHANDEF_PR_FMT	" control:%d MHz width:%d center: %d/%d MHz"
-#define CHANDEF_PR_ARG	__entry->control_freq, __entry->chan_width,		\
+#define CHANDEF_PR_ARG	__entry->control_freq, __entry->chan_width,			\
 			__entry->center_freq1, __entry->center_freq2
 
-#define CHANCTX_ENTRY	CHANDEF_ENTRY						\
-			__field(u8, rx_chains_static)				\
+#define CHANCTX_ENTRY	CHANDEF_ENTRY							\
+			__field(u8, rx_chains_static)					\
 			__field(u8, rx_chains_dynamic)
-#define CHANCTX_ASSIGN	CHANDEF_ASSIGN(&ctx->conf.def)				\
-			__entry->rx_chains_static = ctx->conf.rx_chains_static;	\
+#define CHANCTX_ASSIGN	CHANDEF_ASSIGN(&ctx->conf.def)					\
+			__entry->rx_chains_static = ctx->conf.rx_chains_static;		\
 			__entry->rx_chains_dynamic = ctx->conf.rx_chains_dynamic
 #define CHANCTX_PR_FMT	CHANDEF_PR_FMT " chains:%d/%d"
-#define CHANCTX_PR_ARG	CHANDEF_PR_ARG,						\
+#define CHANCTX_PR_ARG	CHANDEF_PR_ARG,							\
 			__entry->rx_chains_static, __entry->rx_chains_dynamic
 
 
@@ -286,8 +286,7 @@ TRACE_EVENT(drv_config,
 		__field(u16, listen_interval)
 		__field(u8, long_frame_max_tx_count)
 		__field(u8, short_frame_max_tx_count)
-		__field(int, center_freq)
-		__field(int, channel_type)
+		CHANDEF_ENTRY
 		__field(int, smps)
 	),
 
@@ -303,15 +302,13 @@ TRACE_EVENT(drv_config,
 			local->hw.conf.long_frame_max_tx_count;
 		__entry->short_frame_max_tx_count =
 			local->hw.conf.short_frame_max_tx_count;
-		__entry->center_freq = local->hw.conf.channel ?
-					local->hw.conf.channel->center_freq : 0;
-		__entry->channel_type = local->hw.conf.channel_type;
+		CHANDEF_ASSIGN(&local->hw.conf.chandef)
 		__entry->smps = local->hw.conf.smps_mode;
 	),
 
 	TP_printk(
-		LOCAL_PR_FMT " ch:%#x freq:%d",
-		LOCAL_PR_ARG, __entry->changed, __entry->center_freq
+		LOCAL_PR_FMT " ch:%#x" CHANDEF_PR_FMT,
+		LOCAL_PR_ARG, __entry->changed, CHANDEF_PR_ARG
 	)
 );
 
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 4a83d8d..aad0bf5 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1709,7 +1709,7 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
 	if (chanctx_conf)
 		chan = chanctx_conf->def.chan;
 	else if (!local->use_chanctx)
-		chan = local->_oper_channel;
+		chan = local->_oper_chandef.chan;
 	else
 		goto fail_rcu;
 
@@ -1843,7 +1843,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		 * This is the exception! WDS style interfaces are prohibited
 		 * when channel contexts are in used so this must be valid
 		 */
-		band = local->hw.conf.channel->band;
+		band = local->hw.conf.chandef.chan->band;
 		break;
 #ifdef CONFIG_MAC80211_MESH
 	case NL80211_IFTYPE_MESH_POINT:
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 90cc2b8..1734cd2 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -2171,8 +2171,7 @@ void ieee80211_dfs_radar_detected_work(struct work_struct *work)
 		/* currently not handled */
 		WARN_ON(1);
 	else {
-		cfg80211_chandef_create(&chandef, local->hw.conf.channel,
-					local->hw.conf.channel_type);
+		chandef = local->hw.conf.chandef;
 		cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
 	}
 }