4 files changed, 58 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c
index 37cf1439a8a0..2eb832246ad3 100644
--- a/drivers/net/wireless/realtek/rtw88/debug.c
+++ b/drivers/net/wireless/realtek/rtw88/debug.c
@@ -152,6 +152,22 @@ static int rtw_debugfs_get_rf_read(struct seq_file *m, void *v)
 	return 0;
 }
 
+static int rtw_debugfs_get_fix_rate(struct seq_file *m, void *v)
+{
+	struct rtw_debugfs_priv *debugfs_priv = m->private;
+	struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+	struct rtw_dm_info *dm_info = &rtwdev->dm_info;
+	u8 fix_rate = dm_info->fix_rate;
+
+	if (fix_rate >= DESC_RATE_MAX) {
+		seq_printf(m, "Fix rate disabled, fix_rate = %u\n", fix_rate);
+		return 0;
+	}
+
+	seq_printf(m, "Data frames fixed at desc rate %u\n", fix_rate);
+	return 0;
+}
+
 static int rtw_debugfs_copy_from_user(char tmp[], int size,
 				      const char __user *buffer, size_t count,
 				      int num)
@@ -437,6 +453,31 @@ static ssize_t rtw_debugfs_set_rf_read(struct file *filp,
 	return count;
 }
 
+static ssize_t rtw_debugfs_set_fix_rate(struct file *filp,
+					const char __user *buffer,
+					size_t count, loff_t *loff)
+{
+	struct seq_file *seqpriv = (struct seq_file *)filp->private_data;
+	struct rtw_debugfs_priv *debugfs_priv = seqpriv->private;
+	struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+	struct rtw_dm_info *dm_info = &rtwdev->dm_info;
+	u8 fix_rate;
+	char tmp[32 + 1];
+	int ret;
+
+	rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 1);
+
+	ret = kstrtou8(tmp, 0, &fix_rate);
+	if (ret) {
+		rtw_warn(rtwdev, "invalid args, [rate]\n");
+		return ret;
+	}
+
+	dm_info->fix_rate = fix_rate;
+
+	return count;
+}
+
 static int rtw_debug_get_mac_page(struct seq_file *m, void *v)
 {
 	struct rtw_debugfs_priv *debugfs_priv = m->private;
@@ -1094,6 +1135,11 @@ static struct rtw_debugfs_priv rtw_debug_priv_read_reg = {
 	.cb_read = rtw_debugfs_get_read_reg,
 };
 
+static struct rtw_debugfs_priv rtw_debug_priv_fix_rate = {
+	.cb_write = rtw_debugfs_set_fix_rate,
+	.cb_read = rtw_debugfs_get_fix_rate,
+};
+
 static struct rtw_debugfs_priv rtw_debug_priv_dump_cam = {
 	.cb_write = rtw_debugfs_set_single_input,
 	.cb_read = rtw_debugfs_get_dump_cam,
@@ -1164,6 +1210,7 @@ void rtw_debugfs_init(struct rtw_dev *rtwdev)
 	rtw_debugfs_add_rw(read_reg);
 	rtw_debugfs_add_w(rf_write);
 	rtw_debugfs_add_rw(rf_read);
+	rtw_debugfs_add_rw(fix_rate);
 	rtw_debugfs_add_rw(dump_cam);
 	rtw_debugfs_add_rw(rsvd_page);
 	rtw_debugfs_add_r(phy_info);
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index a0d4d6e31fb4..78fcbc20942d 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -1862,6 +1862,7 @@ int rtw_core_init(struct rtw_dev *rtwdev)
 
 	rtwdev->sec.total_cam_num = 32;
 	rtwdev->hal.current_channel = 1;
+	rtwdev->dm_info.fix_rate = U8_MAX;
 	set_bit(RTW_BC_MC_MACID, rtwdev->mac_id_map);
 
 	rtw_stats_init(rtwdev);
diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h
index c37f1d508882..5e043101ee74 100644
--- a/drivers/net/wireless/realtek/rtw88/main.h
+++ b/drivers/net/wireless/realtek/rtw88/main.h
@@ -1631,6 +1631,7 @@ struct rtw_dm_info {
 	u8 cck_gi_u_bnd;
 	u8 cck_gi_l_bnd;
 
+	u8 fix_rate;
 	u8 tx_rate;
 	u32 rrsr_val_init;
 	u32 rrsr_mask_min;
diff --git a/drivers/net/wireless/realtek/rtw88/tx.c b/drivers/net/wireless/realtek/rtw88/tx.c
index f9332fa463ca..efcc1b0371a8 100644
--- a/drivers/net/wireless/realtek/rtw88/tx.c
+++ b/drivers/net/wireless/realtek/rtw88/tx.c
@@ -312,7 +312,9 @@ static void rtw_tx_data_pkt_info_update(struct rtw_dev *rtwdev,
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_hw *hw = rtwdev->hw;
+	struct rtw_dm_info *dm_info = &rtwdev->dm_info;
 	struct rtw_sta_info *si;
+	u8 fix_rate;
 	u16 seq;
 	u8 ampdu_factor = 0;
 	u8 ampdu_density = 0;
@@ -364,6 +366,13 @@ out:
 	pkt_info->bw = bw;
 	pkt_info->stbc = stbc;
 	pkt_info->ldpc = ldpc;
+
+	fix_rate = dm_info->fix_rate;
+	if (fix_rate < DESC_RATE_MAX) {
+		pkt_info->rate = fix_rate;
+		pkt_info->dis_rate_fallback = true;
+		pkt_info->use_rate = true;
+	}
 }
 
 void rtw_tx_pkt_info_update(struct rtw_dev *rtwdev,