1 files changed, 461 insertions, 176 deletions

diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index 30d58d2d13e2..e441f8541603 100644
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -1,24 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright 2002-2005, Instant802 Networks, Inc.
  * Copyright 2005-2006, Devicescape Software, Inc.
  * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
+ * Copyright 2017	Intel Deutschland GmbH
+ * Copyright (C) 2019, 2022-2025 Intel Corporation
  */
 
 #include <linux/kernel.h>
 #include <linux/rtnetlink.h>
-#include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include "rate.h"
 #include "ieee80211_i.h"
 #include "debugfs.h"
 
 struct rate_control_alg {
 	struct list_head list;
-	struct rate_control_ops *ops;
+	const struct rate_control_ops *ops;
 };
 
 static LIST_HEAD(rate_ctrl_algs);
@@ -29,7 +28,125 @@ module_param(ieee80211_default_rc_algo, charp, 0644);
 MODULE_PARM_DESC(ieee80211_default_rc_algo,
 		 "Default rate control algorithm for mac80211 to use");
 
-int ieee80211_rate_control_register(struct rate_control_ops *ops)
+void rate_control_rate_init(struct link_sta_info *link_sta)
+{
+	struct sta_info *sta = link_sta->sta;
+	struct ieee80211_local *local = sta->sdata->local;
+	struct rate_control_ref *ref = sta->rate_ctrl;
+	struct ieee80211_sta *ista = &sta->sta;
+	void *priv_sta = sta->rate_ctrl_priv;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+
+	ieee80211_sta_init_nss(link_sta);
+
+	if (!ref)
+		return;
+
+	/* SW rate control isn't supported with MLO right now */
+	if (WARN_ON(ieee80211_vif_is_mld(&sta->sdata->vif)))
+		return;
+
+	rcu_read_lock();
+
+	chanctx_conf = rcu_dereference(sta->sdata->vif.bss_conf.chanctx_conf);
+	if (WARN_ON(!chanctx_conf)) {
+		rcu_read_unlock();
+		return;
+	}
+
+	sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band];
+
+	/* TODO: check for minstrel_s1g ? */
+	if (sband->band == NL80211_BAND_S1GHZ) {
+		ieee80211_s1g_sta_rate_init(sta);
+		rcu_read_unlock();
+		return;
+	}
+
+	spin_lock_bh(&sta->rate_ctrl_lock);
+	ref->ops->rate_init(ref->priv, sband, &chanctx_conf->def, ista,
+			    priv_sta);
+	spin_unlock_bh(&sta->rate_ctrl_lock);
+	rcu_read_unlock();
+	set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
+}
+
+void rate_control_rate_init_all_links(struct sta_info *sta)
+{
+	int link_id;
+
+	for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) {
+		struct link_sta_info *link_sta;
+
+		link_sta = sdata_dereference(sta->link[link_id], sta->sdata);
+		if (!link_sta)
+			continue;
+
+		rate_control_rate_init(link_sta);
+	}
+}
+
+void rate_control_tx_status(struct ieee80211_local *local,
+			    struct ieee80211_tx_status *st)
+{
+	struct rate_control_ref *ref = local->rate_ctrl;
+	struct sta_info *sta = container_of(st->sta, struct sta_info, sta);
+	void *priv_sta = sta->rate_ctrl_priv;
+	struct ieee80211_supported_band *sband;
+
+	if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
+		return;
+
+	if (st->info->band >= NUM_NL80211_BANDS)
+		return;
+
+	sband = local->hw.wiphy->bands[st->info->band];
+
+	spin_lock_bh(&sta->rate_ctrl_lock);
+	if (ref->ops->tx_status_ext)
+		ref->ops->tx_status_ext(ref->priv, sband, priv_sta, st);
+	else if (st->skb)
+		ref->ops->tx_status(ref->priv, sband, st->sta, priv_sta, st->skb);
+	else
+		WARN_ON_ONCE(1);
+
+	spin_unlock_bh(&sta->rate_ctrl_lock);
+}
+
+void rate_control_rate_update(struct ieee80211_local *local,
+			      struct ieee80211_supported_band *sband,
+			      struct link_sta_info *link_sta,
+			      u32 changed)
+{
+	struct rate_control_ref *ref = local->rate_ctrl;
+	struct sta_info *sta = link_sta->sta;
+	struct ieee80211_sta *ista = &sta->sta;
+	void *priv_sta = sta->rate_ctrl_priv;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+
+	if (ref && ref->ops->rate_update) {
+		rcu_read_lock();
+
+		chanctx_conf = rcu_dereference(sta->sdata->vif.bss_conf.chanctx_conf);
+		if (WARN_ON(!chanctx_conf)) {
+			rcu_read_unlock();
+			return;
+		}
+
+		spin_lock_bh(&sta->rate_ctrl_lock);
+		ref->ops->rate_update(ref->priv, sband, &chanctx_conf->def,
+				      ista, priv_sta, changed);
+		spin_unlock_bh(&sta->rate_ctrl_lock);
+		rcu_read_unlock();
+	}
+
+	if (sta->uploaded)
+		drv_link_sta_rc_update(local, sta->sdata, link_sta->pub,
+				       changed);
+}
+
+int ieee80211_rate_control_register(const struct rate_control_ops *ops)
 {
 	struct rate_control_alg *alg;
 
@@ -60,7 +177,7 @@ int ieee80211_rate_control_register(struct rate_control_ops *ops)
 }
 EXPORT_SYMBOL(ieee80211_rate_control_register);
 
-void ieee80211_rate_control_unregister(struct rate_control_ops *ops)
+void ieee80211_rate_control_unregister(const struct rate_control_ops *ops)
 {
 	struct rate_control_alg *alg;
 
@@ -76,60 +193,52 @@ void ieee80211_rate_control_unregister(struct rate_control_ops *ops)
 }
 EXPORT_SYMBOL(ieee80211_rate_control_unregister);
 
-static struct rate_control_ops *
+static const struct rate_control_ops *
 ieee80211_try_rate_control_ops_get(const char *name)
 {
 	struct rate_control_alg *alg;
-	struct rate_control_ops *ops = NULL;
+	const struct rate_control_ops *ops = NULL;
 
 	if (!name)
 		return NULL;
 
 	mutex_lock(&rate_ctrl_mutex);
 	list_for_each_entry(alg, &rate_ctrl_algs, list) {
-		if (!strcmp(alg->ops->name, name))
-			if (try_module_get(alg->ops->module)) {
-				ops = alg->ops;
-				break;
-			}
+		if (!strcmp(alg->ops->name, name)) {
+			ops = alg->ops;
+			break;
+		}
 	}
 	mutex_unlock(&rate_ctrl_mutex);
 	return ops;
 }
 
 /* Get the rate control algorithm. */
-static struct rate_control_ops *
+static const struct rate_control_ops *
 ieee80211_rate_control_ops_get(const char *name)
 {
-	struct rate_control_ops *ops;
+	const struct rate_control_ops *ops;
 	const char *alg_name;
 
-	kparam_block_sysfs_write(ieee80211_default_rc_algo);
+	kernel_param_lock(THIS_MODULE);
 	if (!name)
 		alg_name = ieee80211_default_rc_algo;
 	else
 		alg_name = name;
 
 	ops = ieee80211_try_rate_control_ops_get(alg_name);
-	if (!ops) {
-		request_module("rc80211_%s", alg_name);
-		ops = ieee80211_try_rate_control_ops_get(alg_name);
-	}
 	if (!ops && name)
 		/* try default if specific alg requested but not found */
 		ops = ieee80211_try_rate_control_ops_get(ieee80211_default_rc_algo);
 
-	/* try built-in one if specific alg requested but not found */
-	if (!ops && strlen(CONFIG_MAC80211_RC_DEFAULT))
+	/* Note: check for > 0 is intentional to avoid clang warning */
+	if (!ops && (strlen(CONFIG_MAC80211_RC_DEFAULT) > 0))
+		/* try built-in one if specific alg requested but not found */
 		ops = ieee80211_try_rate_control_ops_get(CONFIG_MAC80211_RC_DEFAULT);
-	kparam_unblock_sysfs_write(ieee80211_default_rc_algo);
 
-	return ops;
-}
+	kernel_param_unlock(THIS_MODULE);
 
-static void ieee80211_rate_control_ops_put(struct rate_control_ops *ops)
-{
-	module_put(ops->module);
+	return ops;
 }
 
 #ifdef CONFIG_MAC80211_DEBUGFS
@@ -143,88 +252,112 @@ static ssize_t rcname_read(struct file *file, char __user *userbuf,
 				       ref->ops->name, len);
 }
 
-static const struct file_operations rcname_ops = {
+const struct debugfs_short_fops rcname_ops = {
 	.read = rcname_read,
-	.open = simple_open,
 	.llseek = default_llseek,
 };
 #endif
 
-static struct rate_control_ref *rate_control_alloc(const char *name,
-					    struct ieee80211_local *local)
+static struct rate_control_ref *
+rate_control_alloc(const char *name, struct ieee80211_local *local)
 {
-	struct dentry *debugfsdir = NULL;
 	struct rate_control_ref *ref;
 
 	ref = kmalloc(sizeof(struct rate_control_ref), GFP_KERNEL);
 	if (!ref)
-		goto fail_ref;
-	ref->local = local;
+		return NULL;
 	ref->ops = ieee80211_rate_control_ops_get(name);
 	if (!ref->ops)
-		goto fail_ops;
-
-#ifdef CONFIG_MAC80211_DEBUGFS
-	debugfsdir = debugfs_create_dir("rc", local->hw.wiphy->debugfsdir);
-	local->debugfs.rcdir = debugfsdir;
-	debugfs_create_file("name", 0400, debugfsdir, ref, &rcname_ops);
-#endif
+		goto free;
 
-	ref->priv = ref->ops->alloc(&local->hw, debugfsdir);
+	ref->priv = ref->ops->alloc(&local->hw);
 	if (!ref->priv)
-		goto fail_priv;
+		goto free;
 	return ref;
 
-fail_priv:
-	ieee80211_rate_control_ops_put(ref->ops);
-fail_ops:
+free:
 	kfree(ref);
-fail_ref:
 	return NULL;
 }
 
-static void rate_control_free(struct rate_control_ref *ctrl_ref)
+static void rate_control_free(struct ieee80211_local *local,
+			      struct rate_control_ref *ctrl_ref)
 {
 	ctrl_ref->ops->free(ctrl_ref->priv);
 
 #ifdef CONFIG_MAC80211_DEBUGFS
-	debugfs_remove_recursive(ctrl_ref->local->debugfs.rcdir);
-	ctrl_ref->local->debugfs.rcdir = NULL;
+	debugfs_remove_recursive(local->debugfs.rcdir);
+	local->debugfs.rcdir = NULL;
 #endif
 
-	ieee80211_rate_control_ops_put(ctrl_ref->ops);
 	kfree(ctrl_ref);
 }
 
+void ieee80211_check_rate_mask(struct ieee80211_link_data *link)
+{
+	struct ieee80211_sub_if_data *sdata = link->sdata;
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_supported_band *sband;
+	u32 user_mask, basic_rates = link->conf->basic_rates;
+	enum nl80211_band band;
+
+	if (WARN_ON(!link->conf->chanreq.oper.chan))
+		return;
+
+	band = link->conf->chanreq.oper.chan->band;
+	if (band == NL80211_BAND_S1GHZ) {
+		/* TODO */
+		return;
+	}
+
+	if (WARN_ON_ONCE(!basic_rates))
+		return;
+
+	user_mask = sdata->rc_rateidx_mask[band];
+	sband = local->hw.wiphy->bands[band];
+
+	if (user_mask & basic_rates)
+		return;
+
+	sdata_dbg(sdata,
+		  "no overlap between basic rates (0x%x) and user mask (0x%x on band %d) - clearing the latter",
+		  basic_rates, user_mask, band);
+	sdata->rc_rateidx_mask[band] = (1 << sband->n_bitrates) - 1;
+}
+
 static bool rc_no_data_or_no_ack_use_min(struct ieee80211_tx_rate_control *txrc)
 {
 	struct sk_buff *skb = txrc->skb;
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-	__le16 fc;
-
-	fc = hdr->frame_control;
 
 	return (info->flags & (IEEE80211_TX_CTL_NO_ACK |
 			       IEEE80211_TX_CTL_USE_MINRATE)) ||
-		!ieee80211_is_data(fc);
+		!ieee80211_is_tx_data(skb);
 }
 
-static void rc_send_low_broadcast(s8 *idx, u32 basic_rates,
+static void rc_send_low_basicrate(struct ieee80211_tx_rate *rate,
+				  u32 basic_rates,
 				  struct ieee80211_supported_band *sband)
 {
 	u8 i;
 
+	if (sband->band == NL80211_BAND_S1GHZ) {
+		/* TODO */
+		rate->flags |= IEEE80211_TX_RC_S1G_MCS;
+		rate->idx = 0;
+		return;
+	}
+
 	if (basic_rates == 0)
 		return; /* assume basic rates unknown and accept rate */
-	if (*idx < 0)
+	if (rate->idx < 0)
 		return;
-	if (basic_rates & (1 << *idx))
+	if (basic_rates & (1 << rate->idx))
 		return; /* selected rate is a basic rate */
 
-	for (i = *idx + 1; i <= sband->n_bitrates; i++) {
+	for (i = rate->idx + 1; i <= sband->n_bitrates; i++) {
 		if (basic_rates & (1 << i)) {
-			*idx = i;
+			rate->idx = i;
 			return;
 		}
 	}
@@ -232,37 +365,45 @@ static void rc_send_low_broadcast(s8 *idx, u32 basic_rates,
 	/* could not find a basic rate; use original selection */
 }
 
-static inline s8
-rate_lowest_non_cck_index(struct ieee80211_supported_band *sband,
-			  struct ieee80211_sta *sta)
+static void __rate_control_send_low(struct ieee80211_hw *hw,
+				    struct ieee80211_supported_band *sband,
+				    struct ieee80211_sta *sta,
+				    struct ieee80211_tx_info *info,
+				    u32 rate_mask)
 {
+	u32 rate_flags = 0;
 	int i;
 
+	if (sband->band == NL80211_BAND_S1GHZ) {
+		info->control.rates[0].flags |= IEEE80211_TX_RC_S1G_MCS;
+		info->control.rates[0].idx = 0;
+		return;
+	}
+
+	if ((sband->band == NL80211_BAND_2GHZ) &&
+	    (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
+		rate_flags |= IEEE80211_RATE_ERP_G;
+
+	info->control.rates[0].idx = 0;
 	for (i = 0; i < sband->n_bitrates; i++) {
-		struct ieee80211_rate *srate = &sband->bitrates[i];
-		if ((srate->bitrate == 10) || (srate->bitrate == 20) ||
-		    (srate->bitrate == 55) || (srate->bitrate == 110))
+		if (!(rate_mask & BIT(i)))
 			continue;
 
-		if (rate_supported(sta, sband->band, i))
-			return i;
-	}
+		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
+			continue;
 
-	/* No matching rate found */
-	return 0;
-}
+		if (!rate_supported(sta, sband->band, i))
+			continue;
 
-static void __rate_control_send_low(struct ieee80211_hw *hw,
-				    struct ieee80211_supported_band *sband,
-				    struct ieee80211_sta *sta,
-				    struct ieee80211_tx_info *info)
-{
-	if ((sband->band != IEEE80211_BAND_2GHZ) ||
-	    !(info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
-		info->control.rates[0].idx = rate_lowest_index(sband, sta);
-	else
-		info->control.rates[0].idx =
-			rate_lowest_non_cck_index(sband, sta);
+		info->control.rates[0].idx = i;
+		break;
+	}
+	WARN_ONCE(i == sband->n_bitrates,
+		  "no supported rates for sta %pM (0x%x, band %d) in rate_mask 0x%x with flags 0x%x\n",
+		  sta ? sta->addr : NULL,
+		  sta ? sta->deflink.supp_rates[sband->band] : -1,
+		  sband->band,
+		  rate_mask, rate_flags);
 
 	info->control.rates[0].count =
 		(info->flags & IEEE80211_TX_CTL_NO_ACK) ?
@@ -272,67 +413,76 @@ static void __rate_control_send_low(struct ieee80211_hw *hw,
 }
 
 
-bool rate_control_send_low(struct ieee80211_sta *sta,
-			   void *priv_sta,
-			   struct ieee80211_tx_rate_control *txrc)
+static bool rate_control_send_low(struct ieee80211_sta *pubsta,
+				  struct ieee80211_tx_rate_control *txrc)
 {
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
 	struct ieee80211_supported_band *sband = txrc->sband;
+	struct sta_info *sta;
 	int mcast_rate;
+	bool use_basicrate = false;
+
+	if (!sband)
+		return false;
 
-	if (!sta || !priv_sta || rc_no_data_or_no_ack_use_min(txrc)) {
-		__rate_control_send_low(txrc->hw, sband, sta, info);
+	if (!pubsta || rc_no_data_or_no_ack_use_min(txrc)) {
+		__rate_control_send_low(txrc->hw, sband, pubsta, info,
+					txrc->rate_idx_mask);
 
-		if (!sta && txrc->bss) {
+		if (!pubsta && txrc->bss) {
 			mcast_rate = txrc->bss_conf->mcast_rate[sband->band];
 			if (mcast_rate > 0) {
 				info->control.rates[0].idx = mcast_rate - 1;
 				return true;
 			}
+			use_basicrate = true;
+		} else if (pubsta) {
+			sta = container_of(pubsta, struct sta_info, sta);
+			if (ieee80211_vif_is_mesh(&sta->sdata->vif))
+				use_basicrate = true;
+		}
 
-			rc_send_low_broadcast(&info->control.rates[0].idx,
+		if (use_basicrate)
+			rc_send_low_basicrate(&info->control.rates[0],
 					      txrc->bss_conf->basic_rates,
 					      sband);
-		}
+
 		return true;
 	}
 	return false;
 }
-EXPORT_SYMBOL(rate_control_send_low);
 
-static bool rate_idx_match_legacy_mask(struct ieee80211_tx_rate *rate,
-				       int n_bitrates, u32 mask)
+static bool rate_idx_match_legacy_mask(s8 *rate_idx, int n_bitrates, u32 mask)
 {
 	int j;
 
 	/* See whether the selected rate or anything below it is allowed. */
-	for (j = rate->idx; j >= 0; j--) {
+	for (j = *rate_idx; j >= 0; j--) {
 		if (mask & (1 << j)) {
 			/* Okay, found a suitable rate. Use it. */
-			rate->idx = j;
+			*rate_idx = j;
 			return true;
 		}
 	}
 
 	/* Try to find a higher rate that would be allowed */
-	for (j = rate->idx + 1; j < n_bitrates; j++) {
+	for (j = *rate_idx + 1; j < n_bitrates; j++) {
 		if (mask & (1 << j)) {
 			/* Okay, found a suitable rate. Use it. */
-			rate->idx = j;
+			*rate_idx = j;
 			return true;
 		}
 	}
 	return false;
 }
 
-static bool rate_idx_match_mcs_mask(struct ieee80211_tx_rate *rate,
-				    u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN])
+static bool rate_idx_match_mcs_mask(s8 *rate_idx, u8 *mcs_mask)
 {
 	int i, j;
 	int ridx, rbit;
 
-	ridx = rate->idx / 8;
-	rbit = rate->idx % 8;
+	ridx = *rate_idx / 8;
+	rbit = *rate_idx % 8;
 
 	/* sanity check */
 	if (ridx < 0 || ridx >= IEEE80211_HT_MCS_MASK_LEN)
@@ -342,20 +492,20 @@ static bool rate_idx_match_mcs_mask(struct ieee80211_tx_rate *rate,
 	for (i = ridx; i >= 0; i--) {
 		for (j = rbit; j >= 0; j--)
 			if (mcs_mask[i] & BIT(j)) {
-				rate->idx = i * 8 + j;
+				*rate_idx = i * 8 + j;
 				return true;
 			}
 		rbit = 7;
 	}
 
 	/* Try to find a higher rate that would be allowed */
-	ridx = (rate->idx + 1) / 8;
-	rbit = (rate->idx + 1) % 8;
+	ridx = (*rate_idx + 1) / 8;
+	rbit = (*rate_idx + 1) % 8;
 
 	for (i = ridx; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
 		for (j = rbit; j < 8; j++)
 			if (mcs_mask[i] & BIT(j)) {
-				rate->idx = i * 8 + j;
+				*rate_idx = i * 8 + j;
 				return true;
 			}
 		rbit = 0;
@@ -363,37 +513,93 @@ static bool rate_idx_match_mcs_mask(struct ieee80211_tx_rate *rate,
 	return false;
 }
 
+static bool rate_idx_match_vht_mcs_mask(s8 *rate_idx, u16 *vht_mask)
+{
+	int i, j;
+	int ridx, rbit;
 
+	ridx = *rate_idx >> 4;
+	rbit = *rate_idx & 0xf;
 
-static void rate_idx_match_mask(struct ieee80211_tx_rate *rate,
+	if (ridx < 0 || ridx >= NL80211_VHT_NSS_MAX)
+		return false;
+
+	/* See whether the selected rate or anything below it is allowed. */
+	for (i = ridx; i >= 0; i--) {
+		for (j = rbit; j >= 0; j--) {
+			if (vht_mask[i] & BIT(j)) {
+				*rate_idx = (i << 4) | j;
+				return true;
+			}
+		}
+		rbit = 15;
+	}
+
+	/* Try to find a higher rate that would be allowed */
+	ridx = (*rate_idx + 1) >> 4;
+	rbit = (*rate_idx + 1) & 0xf;
+
+	for (i = ridx; i < NL80211_VHT_NSS_MAX; i++) {
+		for (j = rbit; j < 16; j++) {
+			if (vht_mask[i] & BIT(j)) {
+				*rate_idx = (i << 4) | j;
+				return true;
+			}
+		}
+		rbit = 0;
+	}
+	return false;
+}
+
+static void rate_idx_match_mask(s8 *rate_idx, u16 *rate_flags,
 				struct ieee80211_supported_band *sband,
 				enum nl80211_chan_width chan_width,
 				u32 mask,
-				u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN])
+				u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN],
+				u16 vht_mask[NL80211_VHT_NSS_MAX])
 {
-	struct ieee80211_tx_rate alt_rate;
+	if (*rate_flags & IEEE80211_TX_RC_VHT_MCS) {
+		/* handle VHT rates */
+		if (rate_idx_match_vht_mcs_mask(rate_idx, vht_mask))
+			return;
+
+		*rate_idx = 0;
+		/* keep protection flags */
+		*rate_flags &= (IEEE80211_TX_RC_USE_RTS_CTS |
+				IEEE80211_TX_RC_USE_CTS_PROTECT |
+				IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
+
+		*rate_flags |= IEEE80211_TX_RC_MCS;
+		if (chan_width == NL80211_CHAN_WIDTH_40)
+			*rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 
-	/* handle HT rates */
-	if (rate->flags & IEEE80211_TX_RC_MCS) {
-		if (rate_idx_match_mcs_mask(rate, mcs_mask))
+		if (rate_idx_match_mcs_mask(rate_idx, mcs_mask))
+			return;
+
+		/* also try the legacy rates. */
+		*rate_flags &= ~(IEEE80211_TX_RC_MCS |
+				 IEEE80211_TX_RC_40_MHZ_WIDTH);
+		if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates,
+					       mask))
+			return;
+	} else if (*rate_flags & IEEE80211_TX_RC_MCS) {
+		/* handle HT rates */
+		if (rate_idx_match_mcs_mask(rate_idx, mcs_mask))
 			return;
 
 		/* also try the legacy rates. */
-		alt_rate.idx = 0;
+		*rate_idx = 0;
 		/* keep protection flags */
-		alt_rate.flags = rate->flags &
-				 (IEEE80211_TX_RC_USE_RTS_CTS |
-				  IEEE80211_TX_RC_USE_CTS_PROTECT |
-				  IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
-		alt_rate.count = rate->count;
-		if (rate_idx_match_legacy_mask(&alt_rate,
-					       sband->n_bitrates, mask)) {
-			*rate = alt_rate;
+		*rate_flags &= (IEEE80211_TX_RC_USE_RTS_CTS |
+				IEEE80211_TX_RC_USE_CTS_PROTECT |
+				IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
+		if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates,
+					       mask))
 			return;
-		}
 	} else {
 		/* handle legacy rates */
-		if (rate_idx_match_legacy_mask(rate, sband->n_bitrates, mask))
+		if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates,
+					       mask))
 			return;
 
 		/* if HT BSS, and we handle a data frame, also try HT rates */
@@ -406,23 +612,19 @@ static void rate_idx_match_mask(struct ieee80211_tx_rate *rate,
 			break;
 		}
 
-		alt_rate.idx = 0;
+		*rate_idx = 0;
 		/* keep protection flags */
-		alt_rate.flags = rate->flags &
-				 (IEEE80211_TX_RC_USE_RTS_CTS |
-				  IEEE80211_TX_RC_USE_CTS_PROTECT |
-				  IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
-		alt_rate.count = rate->count;
+		*rate_flags &= (IEEE80211_TX_RC_USE_RTS_CTS |
+				IEEE80211_TX_RC_USE_CTS_PROTECT |
+				IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
 
-		alt_rate.flags |= IEEE80211_TX_RC_MCS;
+		*rate_flags |= IEEE80211_TX_RC_MCS;
 
 		if (chan_width == NL80211_CHAN_WIDTH_40)
-			alt_rate.flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
+			*rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 
-		if (rate_idx_match_mcs_mask(&alt_rate, mcs_mask)) {
-			*rate = alt_rate;
+		if (rate_idx_match_mcs_mask(rate_idx, mcs_mask))
 			return;
-		}
 	}
 
 	/*
@@ -452,9 +654,10 @@ static void rate_fixup_ratelist(struct ieee80211_vif *vif,
 	 *
 	 * XXX: Should this check all retry rates?
 	 */
-	if (!(rates[0].flags & IEEE80211_TX_RC_MCS)) {
+	if (!(rates[0].flags &
+	      (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))) {
 		u32 basic_rates = vif->bss_conf.basic_rates;
-		s8 baserate = basic_rates ? ffs(basic_rates - 1) : 0;
+		s8 baserate = basic_rates ? ffs(basic_rates) - 1 : 0;
 
 		rate = &sband->bitrates[rates[0].idx];
 
@@ -574,17 +777,87 @@ static void rate_control_fill_sta_table(struct ieee80211_sta *sta,
 	}
 }
 
+static bool rate_control_cap_mask(struct ieee80211_sub_if_data *sdata,
+				  struct ieee80211_supported_band *sband,
+				  struct ieee80211_sta *sta, u32 *mask,
+				  u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN],
+				  u16 vht_mask[NL80211_VHT_NSS_MAX])
+{
+	u32 i;
+
+	*mask = sdata->rc_rateidx_mask[sband->band];
+
+	if (*mask == (1 << sband->n_bitrates) - 1 &&
+	    !sdata->rc_has_mcs_mask[sband->band] &&
+	    !sdata->rc_has_vht_mcs_mask[sband->band])
+		return false;
+
+	if (sdata->rc_has_mcs_mask[sband->band])
+		memcpy(mcs_mask, sdata->rc_rateidx_mcs_mask[sband->band],
+		       IEEE80211_HT_MCS_MASK_LEN);
+	else
+		memset(mcs_mask, 0xff, IEEE80211_HT_MCS_MASK_LEN);
+
+	if (sdata->rc_has_vht_mcs_mask[sband->band])
+		memcpy(vht_mask, sdata->rc_rateidx_vht_mcs_mask[sband->band],
+		       sizeof(u16) * NL80211_VHT_NSS_MAX);
+	else
+		memset(vht_mask, 0xff, sizeof(u16) * NL80211_VHT_NSS_MAX);
+
+	if (sta) {
+		__le16 sta_vht_cap;
+		u16 sta_vht_mask[NL80211_VHT_NSS_MAX];
+
+		/* Filter out rates that the STA does not support */
+		*mask &= sta->deflink.supp_rates[sband->band];
+		for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
+			mcs_mask[i] &= sta->deflink.ht_cap.mcs.rx_mask[i];
+
+		sta_vht_cap = sta->deflink.vht_cap.vht_mcs.rx_mcs_map;
+		ieee80211_get_vht_mask_from_cap(sta_vht_cap, sta_vht_mask);
+		for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
+			vht_mask[i] &= sta_vht_mask[i];
+	}
+
+	return true;
+}
+
+static void
+rate_control_apply_mask_ratetbl(struct sta_info *sta,
+				struct ieee80211_supported_band *sband,
+				struct ieee80211_sta_rates *rates)
+{
+	int i;
+	u32 mask;
+	u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
+	u16 vht_mask[NL80211_VHT_NSS_MAX];
+	enum nl80211_chan_width chan_width;
+
+	if (!rate_control_cap_mask(sta->sdata, sband, &sta->sta, &mask,
+				   mcs_mask, vht_mask))
+		return;
+
+	chan_width = sta->sdata->vif.bss_conf.chanreq.oper.width;
+	for (i = 0; i < IEEE80211_TX_RATE_TABLE_SIZE; i++) {
+		if (rates->rate[i].idx < 0)
+			break;
+
+		rate_idx_match_mask(&rates->rate[i].idx, &rates->rate[i].flags,
+				    sband, chan_width, mask, mcs_mask,
+				    vht_mask);
+	}
+}
+
 static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata,
 				    struct ieee80211_sta *sta,
 				    struct ieee80211_supported_band *sband,
-				    struct ieee80211_tx_info *info,
 				    struct ieee80211_tx_rate *rates,
 				    int max_rates)
 {
 	enum nl80211_chan_width chan_width;
 	u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
-	bool has_mcs_mask;
 	u32 mask;
+	u16 rate_flags, vht_mask[NL80211_VHT_NSS_MAX];
 	int i;
 
 	/*
@@ -592,37 +865,25 @@ static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata,
 	 * default mask (allow all rates) is used to save some processing for
 	 * the common case.
 	 */
-	mask = sdata->rc_rateidx_mask[info->band];
-	has_mcs_mask = sdata->rc_has_mcs_mask[info->band];
-	if (mask == (1 << sband->n_bitrates) - 1 && !has_mcs_mask)
+	if (!rate_control_cap_mask(sdata, sband, sta, &mask, mcs_mask,
+				   vht_mask))
 		return;
 
-	if (has_mcs_mask)
-		memcpy(mcs_mask, sdata->rc_rateidx_mcs_mask[info->band],
-		       sizeof(mcs_mask));
-	else
-		memset(mcs_mask, 0xff, sizeof(mcs_mask));
-
-	if (sta) {
-		/* Filter out rates that the STA does not support */
-		mask &= sta->supp_rates[info->band];
-		for (i = 0; i < sizeof(mcs_mask); i++)
-			mcs_mask[i] &= sta->ht_cap.mcs.rx_mask[i];
-	}
-
 	/*
 	 * Make sure the rate index selected for each TX rate is
 	 * included in the configured mask and change the rate indexes
 	 * if needed.
 	 */
-	chan_width = sdata->vif.bss_conf.chandef.width;
+	chan_width = sdata->vif.bss_conf.chanreq.oper.width;
 	for (i = 0; i < max_rates; i++) {
 		/* Skip invalid rates */
 		if (rates[i].idx < 0)
 			break;
 
-		rate_idx_match_mask(&rates[i], sband, chan_width, mask,
-				    mcs_mask);
+		rate_flags = rates[i].flags;
+		rate_idx_match_mask(&rates[i].idx, &rate_flags, sband,
+				    chan_width, mask, mcs_mask, vht_mask);
+		rates[i].flags = rate_flags;
 	}
 }
 
@@ -633,9 +894,9 @@ void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
 			    int max_rates)
 {
 	struct ieee80211_sub_if_data *sdata;
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_supported_band *sband;
+	u32 mask = ~0;
 
 	rate_control_fill_sta_table(sta, info, dest, max_rates);
 
@@ -643,13 +904,20 @@ void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
 		return;
 
 	sdata = vif_to_sdata(vif);
+	if (info->band >= NUM_NL80211_BANDS)
+		return;
+
 	sband = sdata->local->hw.wiphy->bands[info->band];
 
-	if (ieee80211_is_data(hdr->frame_control))
-		rate_control_apply_mask(sdata, sta, sband, info, dest, max_rates);
+	if (ieee80211_is_tx_data(skb))
+		rate_control_apply_mask(sdata, sta, sband, dest, max_rates);
+
+	if (!(info->control.flags & IEEE80211_TX_CTRL_DONT_USE_RATE_MASK))
+		mask = sdata->rc_rateidx_mask[info->band];
 
 	if (dest[0].idx < 0)
-		__rate_control_send_low(&sdata->local->hw, sband, sta, info);
+		__rate_control_send_low(&sdata->local->hw, sband, sta, info,
+					mask);
 
 	if (sta)
 		rate_fixup_ratelist(vif, sband, info, dest, max_rates);
@@ -666,23 +934,32 @@ void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
 	int i;
 
-	if (sta && test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) {
-		ista = &sta->sta;
-		priv_sta = sta->rate_ctrl_priv;
-	}
-
 	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 		info->control.rates[i].idx = -1;
 		info->control.rates[i].flags = 0;
 		info->control.rates[i].count = 0;
 	}
 
-	if (sdata->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
+	if (rate_control_send_low(sta ? &sta->sta : NULL, txrc))
+		return;
+
+	if (ieee80211_hw_check(&sdata->local->hw, HAS_RATE_CONTROL))
 		return;
 
-	ref->ops->get_rate(ref->priv, ista, priv_sta, txrc);
+	if (sta && test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) {
+		ista = &sta->sta;
+		priv_sta = sta->rate_ctrl_priv;
+	}
+
+	if (ista) {
+		spin_lock_bh(&sta->rate_ctrl_lock);
+		ref->ops->get_rate(ref->priv, ista, priv_sta, txrc);
+		spin_unlock_bh(&sta->rate_ctrl_lock);
+	} else {
+		rate_control_send_low(NULL, txrc);
+	}
 
-	if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
+	if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_RC_TABLE))
 		return;
 
 	ieee80211_get_tx_rates(&sdata->vif, ista, txrc->skb,
@@ -694,8 +971,14 @@ int rate_control_set_rates(struct ieee80211_hw *hw,
 			   struct ieee80211_sta *pubsta,
 			   struct ieee80211_sta_rates *rates)
 {
+	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
 	struct ieee80211_sta_rates *old;
+	struct ieee80211_supported_band *sband;
 
+	sband = ieee80211_get_sband(sta->sdata);
+	if (!sband)
+		return -EINVAL;
+	rate_control_apply_mask_ratetbl(sta, sband, rates);
 	/*
 	 * mac80211 guarantees that this function will not be called
 	 * concurrently, so the following RCU access is safe, even without
@@ -707,6 +990,9 @@ int rate_control_set_rates(struct ieee80211_hw *hw,
 	if (old)
 		kfree_rcu(old, rcu_head);
 
+	if (sta->uploaded)
+		drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta);
+
 	return 0;
 }
 EXPORT_SYMBOL(rate_control_set_rates);
@@ -721,7 +1007,7 @@ int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 	if (local->open_count)
 		return -EBUSY;
 
-	if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) {
+	if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
 		if (WARN_ON(!local->ops->set_rts_threshold))
 			return -EINVAL;
 		return 0;
@@ -753,6 +1039,5 @@ void rate_control_deinitialize(struct ieee80211_local *local)
 		return;
 
 	local->rate_ctrl = NULL;
-	rate_control_free(ref);
+	rate_control_free(local, ref);
 }
-