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| author |   Zong-Zhe Yang <kevin_yang@realtek.com> | 2021-12-20 17:36:56 +0800 |
|---|---|---|
| committer |   Kalle Valo <kvalo@kernel.org> | 2021-12-21 20:22:38 +0200 |
| commit | 8704d0befb59304eed60204e5524d5051de1d171 (patch) | |
| tree | bef4c346628bb70977c9eba78da5fad7998e2335 /drivers/net/wireless/realtek/rtw88/mac80211.c | |
| parent | rtw88: 8822c: add ieee80211_ops::hw_scan (diff) | |
| download | linux-dev-8704d0befb59304eed60204e5524d5051de1d171.tar.xz linux-dev-8704d0befb59304eed60204e5524d5051de1d171.zip | |
rtw88: support SAR via kernel common API
Register cfg80211_sar_capa with type NL80211_SAR_TYPE_POWER and four
frequency ranges for configurations in unit of 0.25 dBm. And handle
callback set_sar_specs.
Originally, TX power has three main parameters, i.e. power base,
power by rate, and power limit. The formula can be simply considered
as TX power = power base + min(power by rate, power limit). With the
support of SAR which can be treated as another power limit, there is
one more parameter for TX power. And the formula will evolve into
TX power = power base + min(power by rate, power limit, power sar).
Besides, debugfs tx_pwr_tbl is also refined to show SAR information.
The following is an example for the difference.
Before supporting SAR,
-----------------------------------
...
path rate pwr base (byr lmt ) rem
A CCK_1M 66(0x42) 78 -12 ( 12 -12) 0
A CCK_2M 66(0x42) 78 -12 ( 8 -12) 0
...
-----------------------------------
After supporting SAR and making some configurations,
-----------------------------------
...
path rate pwr base (byr lmt sar ) rem
A CCK_1M 62(0x3e) 78 -16 ( 12 -12 -16) 0
A CCK_2M 62(0x3e) 78 -16 ( 8 -12 -16) 0
...
-----------------------------------
Signed-off-by: Zong-Zhe Yang <kevin_yang@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/20211220093656.65312-1-pkshih@realtek.com
Diffstat (limited to 'drivers/net/wireless/realtek/rtw88/mac80211.c')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/mac80211.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/mac80211.c b/drivers/net/wireless/realtek/rtw88/mac80211.c index 5c01c40f248f..ae7d97de5fdf 100644 --- a/drivers/net/wireless/realtek/rtw88/mac80211.c +++ b/drivers/net/wireless/realtek/rtw88/mac80211.c @@ -13,6 +13,7 @@ #include "bf.h" #include "debug.h" #include "wow.h" +#include "sar.h" static void rtw_ops_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control, @@ -836,6 +837,16 @@ static void rtw_ops_cancel_hw_scan(struct ieee80211_hw *hw, mutex_unlock(&rtwdev->mutex); } +static int rtw_ops_set_sar_specs(struct ieee80211_hw *hw, + const struct cfg80211_sar_specs *sar) +{ + struct rtw_dev *rtwdev = hw->priv; + + rtw_set_sar_specs(rtwdev, sar); + + return 0; +} + const struct ieee80211_ops rtw_ops = { .tx = rtw_ops_tx, .wake_tx_queue = rtw_ops_wake_tx_queue, @@ -865,6 +876,7 @@ const struct ieee80211_ops rtw_ops = { .reconfig_complete = rtw_reconfig_complete, .hw_scan = rtw_ops_hw_scan, .cancel_hw_scan = rtw_ops_cancel_hw_scan, + .set_sar_specs = rtw_ops_set_sar_specs, #ifdef CONFIG_PM .suspend = rtw_ops_suspend, .resume = rtw_ops_resume, |