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| author | Yan-Hsuan Chuang <yhchuang@realtek.com> | 2021-11-29 05:05:06 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@kernel.org> | 2021-12-08 21:28:07 +0300 |
| commit | 1379e62026ab5a89b4d0fd1aed68248ceafca5bf (patch) | |
| tree | 0752674c94fe930d680ac8e06494b46b86848d00 /drivers/net/wireless/realtek/rtw88/tx.c | |
| parent | eb4e52b3f38dfd08a89e1084f5980a2bb93456fb (diff) | |
| download | linux-1379e62026ab5a89b4d0fd1aed68248ceafca5bf.tar.xz | |
rtw88: add debugfs to fix tx rate
It is useful to fix the bit rate of TX packets. For example, if
someone is measuring the TX power, or debugging with the issues
of the TX throughput on the field.
To set the value of fixed rate, one should input corresponding
desc rate index (ex, 0x0b for DESC_RATE54M to fix at 54 Mbps).
Set a value larger than DESC_RATE_MAX will disable fix rate, so
the rate adaptive mechanism can resume to work.
Example,
To fix rate at MCS 1:
echo 0x0d > /sys/kernel/debug/ieee80211/phy0/rtw88/fix_rate
To not to fix rate:
echo 0xff > /sys/kernel/debug/ieee80211/phy0/rtw88/fix_rate
To know which rate was fixed at:
cat /sys/kernel/debug/ieee80211/phy0/rtw88/fix_rate
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20211129020506.6273-1-pkshih@realtek.com
Diffstat (limited to 'drivers/net/wireless/realtek/rtw88/tx.c')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/tx.c | 9 |
1 files changed, 9 insertions, 0 deletions
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, |