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rtw88: correct power limit selection

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If phy rate is decreased, sub bandwidth may be chosen by RA.
We consider possible power limits and apply the min one;
otherwise, the tx power index may be larger than spec.

And we cross-reference power limits of vht and ht with
20/40M bandwidth in 5G to avoid values are not assigned.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Zong-Zhe Yang 2019-05-29 15:54:43 +08:00 committed by Kalle Valo
parent adf3c676d1
commit 93f68a865f
3 changed files with 131 additions and 8 deletions
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24
drivers/net/wireless/realtek/rtw88/main.c
View File

@ -198,15 +198,20 @@ void rtw_get_channel_params(struct cfg80211_chan_def *chandef,
{
struct ieee80211_channel *channel = chandef->chan;
enum nl80211_chan_width width = chandef->width;
u8 *cch_by_bw = chan_params->cch_by_bw;
u32 primary_freq, center_freq;
u8 center_chan;
u8 bandwidth = RTW_CHANNEL_WIDTH_20;
u8 primary_chan_idx = 0;
u8 i;
center_chan = channel->hw_value;
primary_freq = channel->center_freq;
center_freq = chandef->center_freq1;
/* assign the center channel used while 20M bw is selected */
cch_by_bw[RTW_CHANNEL_WIDTH_20] = channel->hw_value;
switch (width) {
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_20:
@ -233,6 +238,10 @@ void rtw_get_channel_params(struct cfg80211_chan_def *chandef,
primary_chan_idx = 3;
center_chan -= 6;
}
/* assign the center channel used
* while 40M bw is selected
*/
cch_by_bw[RTW_CHANNEL_WIDTH_40] = center_chan + 4;
} else {
if (center_freq - primary_freq == 10) {
primary_chan_idx = 2;
@ -241,6 +250,10 @@ void rtw_get_channel_params(struct cfg80211_chan_def *chandef,
primary_chan_idx = 4;
center_chan += 6;
}
/* assign the center channel used
* while 40M bw is selected
*/
cch_by_bw[RTW_CHANNEL_WIDTH_40] = center_chan - 4;
}
break;
default:
@ -251,6 +264,12 @@ void rtw_get_channel_params(struct cfg80211_chan_def *chandef,
chan_params->center_chan = center_chan;
chan_params->bandwidth = bandwidth;
chan_params->primary_chan_idx = primary_chan_idx;
/* assign the center channel used while current bw is selected */
cch_by_bw[bandwidth] = center_chan;
for (i = bandwidth + 1; i <= RTW_MAX_CHANNEL_WIDTH; i++)
cch_by_bw[i] = 0;
}
void rtw_set_channel(struct rtw_dev *rtwdev)
@ -260,6 +279,7 @@ void rtw_set_channel(struct rtw_dev *rtwdev)
struct rtw_chip_info *chip = rtwdev->chip;
struct rtw_channel_params ch_param;
u8 center_chan, bandwidth, primary_chan_idx;
u8 i;
rtw_get_channel_params(&hw->conf.chandef, &ch_param);
if (WARN(ch_param.center_chan == 0, "Invalid channel\n"))
@ -272,6 +292,10 @@ void rtw_set_channel(struct rtw_dev *rtwdev)
hal->current_band_width = bandwidth;
hal->current_channel = center_chan;
hal->current_band_type = center_chan > 14 ? RTW_BAND_5G : RTW_BAND_2G;
for (i = RTW_CHANNEL_WIDTH_20; i <= RTW_MAX_CHANNEL_WIDTH; i++)
hal->cch_by_bw[i] = ch_param.cch_by_bw[i];
chip->ops->set_channel(rtwdev, center_chan, bandwidth, primary_chan_idx);
rtw_phy_set_tx_power_level(rtwdev, center_chan);

13
drivers/net/wireless/realtek/rtw88/main.h
View File

@ -62,6 +62,9 @@ enum rtw_supported_band {
RTW_BAND_MAX,
};
/* now, support upto 80M bw */
#define RTW_MAX_CHANNEL_WIDTH RTW_CHANNEL_WIDTH_80
enum rtw_bandwidth {
RTW_CHANNEL_WIDTH_20 = 0,
RTW_CHANNEL_WIDTH_40 = 1,
@ -413,6 +416,10 @@ struct rtw_channel_params {
u8 center_chan;
u8 bandwidth;
u8 primary_chan_idx;
/* center channel by different available bandwidth,
* val of (bw > current bandwidth) is invalid
*/
u8 cch_by_bw[RTW_MAX_CHANNEL_WIDTH + 1];
};
struct rtw_hw_reg {
@ -984,6 +991,12 @@ struct rtw_hal {
u8 current_channel;
u8 current_band_width;
u8 current_band_type;
/* center channel for different available bandwidth,
* val of (bw > current_band_width) is invalid
*/
u8 cch_by_bw[RTW_MAX_CHANNEL_WIDTH + 1];
u8 sec_ch_offset;
u8 rf_type;
u8 rf_path_num;

102
drivers/net/wireless/realtek/rtw88/phy.c
View File

@ -1198,6 +1198,70 @@ static void rtw_phy_set_tx_power_limit(struct rtw_dev *rtwdev, u8 regd, u8 band,
}
}
/* cross-reference 5G power limits if values are not assigned */
static void
rtw_xref_5g_txpwr_lmt(struct rtw_dev *rtwdev, u8 regd,
u8 bw, u8 ch_idx, u8 rs_ht, u8 rs_vht)
{
struct rtw_hal *hal = &rtwdev->hal;
s8 lmt_ht = hal->tx_pwr_limit_5g[regd][bw][rs_ht][ch_idx];
s8 lmt_vht = hal->tx_pwr_limit_5g[regd][bw][rs_vht][ch_idx];
if (lmt_ht == lmt_vht)
return;
if (lmt_ht == RTW_MAX_POWER_INDEX)
hal->tx_pwr_limit_5g[regd][bw][rs_ht][ch_idx] = lmt_vht;
else if (lmt_vht == RTW_MAX_POWER_INDEX)
hal->tx_pwr_limit_5g[regd][bw][rs_vht][ch_idx] = lmt_ht;
}
/* cross-reference power limits for ht and vht */
static void
rtw_xref_txpwr_lmt_by_rs(struct rtw_dev *rtwdev, u8 regd, u8 bw, u8 ch_idx)
{
u8 rs_idx, rs_ht, rs_vht;
u8 rs_cmp[2][2] = {{RTW_RATE_SECTION_HT_1S, RTW_RATE_SECTION_VHT_1S},
{RTW_RATE_SECTION_HT_2S, RTW_RATE_SECTION_VHT_2S} };
for (rs_idx = 0; rs_idx < 2; rs_idx++) {
rs_ht = rs_cmp[rs_idx][0];
rs_vht = rs_cmp[rs_idx][1];
rtw_xref_5g_txpwr_lmt(rtwdev, regd, bw, ch_idx, rs_ht, rs_vht);
}
}
/* cross-reference power limits for 5G channels */
static void
rtw_xref_5g_txpwr_lmt_by_ch(struct rtw_dev *rtwdev, u8 regd, u8 bw)
{
u8 ch_idx;
for (ch_idx = 0; ch_idx < RTW_MAX_CHANNEL_NUM_5G; ch_idx++)
rtw_xref_txpwr_lmt_by_rs(rtwdev, regd, bw, ch_idx);
}
/* cross-reference power limits for 20/40M bandwidth */
static void
rtw_xref_txpwr_lmt_by_bw(struct rtw_dev *rtwdev, u8 regd)
{
u8 bw;
for (bw = RTW_CHANNEL_WIDTH_20; bw <= RTW_CHANNEL_WIDTH_40; bw++)
rtw_xref_5g_txpwr_lmt_by_ch(rtwdev, regd, bw);
}
/* cross-reference power limits */
static void rtw_xref_txpwr_lmt(struct rtw_dev *rtwdev)
{
u8 regd;
for (regd = 0; regd < RTW_REGD_MAX; regd++)
rtw_xref_txpwr_lmt_by_bw(rtwdev, regd);
}
void rtw_parse_tbl_txpwr_lmt(struct rtw_dev *rtwdev,
const struct rtw_table *tbl)
{
@ -1210,6 +1274,8 @@ void rtw_parse_tbl_txpwr_lmt(struct rtw_dev *rtwdev,
rtw_phy_set_tx_power_limit(rtwdev, p->regd, p->band,
p->bw, p->rs, p->ch, p->txpwr_lmt);
}
rtw_xref_txpwr_lmt(rtwdev);
}
void rtw_phy_cfg_mac(struct rtw_dev *rtwdev, const struct rtw_table *tbl,
@ -1479,9 +1545,12 @@ static s8 rtw_phy_get_tx_power_limit(struct rtw_dev *rtwdev, u8 band,
u8 rate, u8 channel, u8 regd)
{
struct rtw_hal *hal = &rtwdev->hal;
s8 power_limit;
u8 *cch_by_bw = hal->cch_by_bw;
s8 power_limit = RTW_MAX_POWER_INDEX;
u8 rs;
int ch_idx;
u8 cur_bw, cur_ch;
s8 cur_lmt;
if (regd > RTW_REGD_WW)
return RTW_MAX_POWER_INDEX;
@ -1501,14 +1570,28 @@ static s8 rtw_phy_get_tx_power_limit(struct rtw_dev *rtwdev, u8 band,
else
goto err;
ch_idx = rtw_channel_to_idx(band, channel);
if (ch_idx < 0)
goto err;
/* only 20M BW with cck and ofdm */
if (rs == RTW_RATE_SECTION_CCK || rs == RTW_RATE_SECTION_OFDM)
bw = RTW_CHANNEL_WIDTH_20;
if (channel <= RTW_MAX_CHANNEL_NUM_2G)
power_limit = hal->tx_pwr_limit_2g[regd][bw][rs][ch_idx];
else
power_limit = hal->tx_pwr_limit_5g[regd][bw][rs][ch_idx];
/* only 20/40M BW with ht */
if (rs == RTW_RATE_SECTION_HT_1S || rs == RTW_RATE_SECTION_HT_2S)
bw = min_t(u8, bw, RTW_CHANNEL_WIDTH_40);
/* select min power limit among [20M BW ~ current BW] */
for (cur_bw = RTW_CHANNEL_WIDTH_20; cur_bw <= bw; cur_bw++) {
cur_ch = cch_by_bw[cur_bw];
ch_idx = rtw_channel_to_idx(band, cur_ch);
if (ch_idx < 0)
goto err;
cur_lmt = cur_ch <= RTW_MAX_CHANNEL_NUM_2G ?
hal->tx_pwr_limit_2g[regd][cur_bw][rs][ch_idx] :
hal->tx_pwr_limit_5g[regd][cur_bw][rs][ch_idx];
power_limit = min_t(s8, cur_lmt, power_limit);
}
return power_limit;
@ -1693,6 +1776,9 @@ void rtw_phy_tx_power_limit_config(struct rtw_hal *hal)
{
u8 regd, bw, rs;
/* default at channel 1 */
hal->cch_by_bw[RTW_CHANNEL_WIDTH_20] = 1;
for (regd = 0; regd < RTW_REGD_MAX; regd++)
for (bw = 0; bw < RTW_CHANNEL_WIDTH_MAX; bw++)
for (rs = 0; rs < RTW_RATE_SECTION_MAX; rs++)