From 93f68a865f119393accaf4e09139d2853edfb53e Mon Sep 17 00:00:00 2001 From: Zong-Zhe Yang Date: Wed, 29 May 2019 15:54:43 +0800 Subject: [PATCH] rtw88: correct power limit selection 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 Signed-off-by: Yan-Hsuan Chuang Signed-off-by: Kalle Valo --- drivers/net/wireless/realtek/rtw88/main.c | 24 +++++ drivers/net/wireless/realtek/rtw88/main.h | 13 +++ drivers/net/wireless/realtek/rtw88/phy.c | 102 ++++++++++++++++++++-- 3 files changed, 131 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c index 3230a7157d57..a03cd8aead5b 100644 --- a/drivers/net/wireless/realtek/rtw88/main.c +++ b/drivers/net/wireless/realtek/rtw88/main.c @@ -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); diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h index 927305075a79..6958bc227abe 100644 --- a/drivers/net/wireless/realtek/rtw88/main.h +++ b/drivers/net/wireless/realtek/rtw88/main.h @@ -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; diff --git a/drivers/net/wireless/realtek/rtw88/phy.c b/drivers/net/wireless/realtek/rtw88/phy.c index ce26b1506e77..521291502e7f 100644 --- a/drivers/net/wireless/realtek/rtw88/phy.c +++ b/drivers/net/wireless/realtek/rtw88/phy.c @@ -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++) -- 2.45.2