From: Yu-Yen Ting <steventing@xxxxxxxxxxx>
The management frame with high rate e.g. 24M may not be transmitted
smoothly in long range environment.
Add a debugfs to force to use the lowest basic rate
in order to debug the reachability of transmitting management frame.
obtain current setting
cat /sys/kernel/debug/ieee80211/phyX/rtw88/force_lowest_basic_rate
force lowest rate:
echo 1 > /sys/kernel/debug/ieee80211/phyX/rtw88/force_lowest_basic_rate
Signed-off-by: Yu-Yen Ting <steventing@xxxxxxxxxxx>
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
---
v3: change the name of debugfs entry to force_lowest_basic_rate
---
drivers/net/wireless/realtek/rtw88/debug.c | 39 ++++++++++++++++++++++
drivers/net/wireless/realtek/rtw88/main.h | 1 +
drivers/net/wireless/realtek/rtw88/tx.c | 3 +-
3 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c
index 682b23502e6e..37cf1439a8a0 100644
--- a/drivers/net/wireless/realtek/rtw88/debug.c
+++ b/drivers/net/wireless/realtek/rtw88/debug.c
@@ -904,6 +904,39 @@ static int rtw_debugfs_get_fw_crash(struct seq_file *m, void *v)
return 0;
}
+static ssize_t rtw_debugfs_set_force_lowest_basic_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;
+ bool input;
+ int err;
+
+ err = kstrtobool_from_user(buffer, count, &input);
+ if (err)
+ return err;
+
+ if (input)
+ set_bit(RTW_FLAG_FORCE_LOWEST_RATE, rtwdev->flags);
+ else
+ clear_bit(RTW_FLAG_FORCE_LOWEST_RATE, rtwdev->flags);
+
+ return count;
+}
+
+static int rtw_debugfs_get_force_lowest_basic_rate(struct seq_file *m, void *v)
+{
+ struct rtw_debugfs_priv *debugfs_priv = m->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+
+ seq_printf(m, "force lowest basic rate: %d\n",
+ test_bit(RTW_FLAG_FORCE_LOWEST_RATE, rtwdev->flags));
+
+ return 0;
+}
+
static ssize_t rtw_debugfs_set_dm_cap(struct file *filp,
const char __user *buffer,
size_t count, loff_t *loff)
@@ -1094,6 +1127,11 @@ static struct rtw_debugfs_priv rtw_debug_priv_fw_crash = {
.cb_read = rtw_debugfs_get_fw_crash,
};
+static struct rtw_debugfs_priv rtw_debug_priv_force_lowest_basic_rate = {
+ .cb_write = rtw_debugfs_set_force_lowest_basic_rate,
+ .cb_read = rtw_debugfs_get_force_lowest_basic_rate,
+};
+
static struct rtw_debugfs_priv rtw_debug_priv_dm_cap = {
.cb_write = rtw_debugfs_set_dm_cap,
.cb_read = rtw_debugfs_get_dm_cap,
@@ -1174,6 +1212,7 @@ void rtw_debugfs_init(struct rtw_dev *rtwdev)
rtw_debugfs_add_r(tx_pwr_tbl);
rtw_debugfs_add_rw(edcca_enable);
rtw_debugfs_add_rw(fw_crash);
+ rtw_debugfs_add_rw(force_lowest_basic_rate);
rtw_debugfs_add_rw(dm_cap);
}
diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h
index bbdd535b64e7..c37f1d508882 100644
--- a/drivers/net/wireless/realtek/rtw88/main.h
+++ b/drivers/net/wireless/realtek/rtw88/main.h
@@ -364,6 +364,7 @@ enum rtw_flags {
RTW_FLAG_WOWLAN,
RTW_FLAG_RESTARTING,
RTW_FLAG_RESTART_TRIGGERING,
+ RTW_FLAG_FORCE_LOWEST_RATE,
NUM_OF_RTW_FLAGS,
};
diff --git a/drivers/net/wireless/realtek/rtw88/tx.c b/drivers/net/wireless/realtek/rtw88/tx.c
index aace284e526e..f9332fa463ca 100644
--- a/drivers/net/wireless/realtek/rtw88/tx.c
+++ b/drivers/net/wireless/realtek/rtw88/tx.c
@@ -238,8 +238,9 @@ static u8 rtw_get_mgmt_rate(struct rtw_dev *rtwdev, struct sk_buff *skb,
{
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_vif *vif = tx_info->control.vif;
+ bool force_lowest = test_bit(RTW_FLAG_FORCE_LOWEST_RATE, rtwdev->flags);
- if (!vif || !vif->bss_conf.basic_rates || ignore_rate)
+ if (!vif || !vif->bss_conf.basic_rates || ignore_rate || force_lowest)
return lowest_rate;
return __ffs(vif->bss_conf.basic_rates) + lowest_rate;
--
2.25.1
