On Tue, 2021-06-22 at 07:07 +0800, sean.wang@xxxxxxxxxxxx wrote:
> From: YN Chen <YN.Chen@xxxxxxxxxxxx>
>
> add .set_sar_specs to allow configuring SAR power limitations on the
> frequency ranges from the userland.
>
> Co-developed-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
> Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
> Signed-off-by: YN Chen <YN.Chen@xxxxxxxxxxxx>
> ---
> v2: 1. loop enhancement with considering no overlapping freqs
> 2. error handling for devm_kcalloc
> 3. sanity check without acquire lock
> ---
> drivers/net/wireless/mediatek/mt76/mt76.h | 3 ++
> .../net/wireless/mediatek/mt76/mt76_connac.h | 5 +++
> .../wireless/mediatek/mt76/mt76_connac_mcu.c | 26 +++++++++++-
> .../net/wireless/mediatek/mt76/mt7921/init.c | 33 ++++++++++++++-
> .../net/wireless/mediatek/mt76/mt7921/main.c | 41
> +++++++++++++++++++
> 5 files changed, 105 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h
> b/drivers/net/wireless/mediatek/mt76/mt76.h
> index 25c5ceef5257..63ce5242c4d5 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt76.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt76.h
> @@ -636,6 +636,9 @@ struct mt76_phy {
> struct sk_buff **tail;
> u16 seqno;
> } rx_amsdu[__MT_RXQ_MAX];
> +
> + void *frp_data;
> + u8 num_frps;
> };
>
> struct mt76_dev {
> diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac.h
> b/drivers/net/wireless/mediatek/mt76/mt76_connac.h
> index f49d97d0a1c5..95c7d1cac7c4 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt76_connac.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt76_connac.h
> @@ -83,6 +83,11 @@ struct mt76_connac_coredump {
> unsigned long last_activity;
> };
>
> +struct mt76_connac_freq_range_power {
> + const struct cfg80211_sar_freq_ranges *range;
> + s8 power;
> +};
> +
> extern const struct wiphy_wowlan_support mt76_connac_wowlan_support;
>
> static inline bool is_mt7921(struct mt76_dev *dev)
> diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
> b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
> index 5c3a81e5f559..497de1d91c7c 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
> @@ -1749,6 +1749,26 @@ mt76_connac_mcu_build_sku(struct mt76_dev
> *dev, s8 *sku,
> }
> }
>
> +static s8 mt76_connac_get_sar_power(struct mt76_phy *phy,
> + struct ieee80211_channel *chan,
> + s8 target_power)
> +{
> + struct mt76_connac_freq_range_power *frp = phy->frp_data;
> + int freq, i;
> +
> + freq = ieee80211_channel_to_frequency(chan->hw_value, chan-
> >band);
> + for (i = 0 ; i < phy->num_frps; i++) {
> + if (frp[i].range &&
> + freq >= frp[i].range->start_freq &&
> + freq < frp[i].range->end_freq) {
> + target_power = min_t(s8, frp[i].power,
> target_power);
> + break;
> + }
> + }
> +
> + return target_power;
> +}
> +
> static int
> mt76_connac_mcu_rate_txpower_band(struct mt76_phy *phy,
> enum nl80211_band band)
> @@ -1816,9 +1836,13 @@ mt76_connac_mcu_rate_txpower_band(struct
> mt76_phy *phy,
> .hw_value = ch_list[idx],
> .band = band,
> };
> + s8 sar_power;
> +
> + sar_power = mt76_connac_get_sar_power(phy,
> &chan,
> + tx_power)
> ;
>
> mt76_get_rate_power_limits(phy, &chan, &limits,
> - tx_power);
> + sar_power);
>
> tx_power_tlv.last_msg = ch_list[idx] ==
> last_ch;
> sku_tlbv.channel = ch_list[idx];
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/init.c
> b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
> index a9ce10b98827..c11a5b925209 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7921/init.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
> @@ -24,6 +24,20 @@ static const struct ieee80211_iface_combination
> if_comb[] = {
> }
> };
>
> +const struct cfg80211_sar_freq_ranges mt7921_sar_freq_ranges[] = {
> + { .start_freq = 2402, .end_freq = 2494, },
> + { .start_freq = 5150, .end_freq = 5350, },
> + { .start_freq = 5350, .end_freq = 5470, },
> + { .start_freq = 5470, .end_freq = 5725, },
> + { .start_freq = 5725, .end_freq = 5950, },
> +};
> +
> +static const struct cfg80211_sar_capa mt7921_sar_capa = {
> + .type = NL80211_SAR_TYPE_POWER,
> + .num_freq_ranges = ARRAY_SIZE(mt7921_sar_freq_ranges),
> + .freq_ranges = &mt7921_sar_freq_ranges[0],
> +};
> +
>
Nowthat we have frps in mt76.h we can make these SAR chunk sharable as
well to provide a common ground to other mt76 station devices might
require set_sar_spec.
Ryder
