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rtw88: add debugfs to force lowest basic rate

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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@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20211102022454.10944-2-pkshih@realtek.com
This commit is contained in:
Yu-Yen Ting 2021-11-02 10:24:54 +08:00 committed by Kalle Valo
parent 2f1367b564
commit 272cda71e8
3 changed files with 42 additions and 1 deletions
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39
drivers/net/wireless/realtek/rtw88/debug.c
View File

@ -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);
}

1
drivers/net/wireless/realtek/rtw88/main.h
View File

@ -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,
};

3
drivers/net/wireless/realtek/rtw88/tx.c
View File

@ -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;