From patchwork Mon Jun 28 23:05:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 468169 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E373C11F64 for ; Mon, 28 Jun 2021 23:06:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F292061CFA for ; Mon, 28 Jun 2021 23:06:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231992AbhF1XI1 (ORCPT ); Mon, 28 Jun 2021 19:08:27 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:42237 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S230163AbhF1XIZ (ORCPT ); Mon, 28 Jun 2021 19:08:25 -0400 X-UUID: 62e88197683447f3921f7c6db78e95d0-20210629 X-UUID: 62e88197683447f3921f7c6db78e95d0-20210629 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1756562193; Tue, 29 Jun 2021 07:05:55 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 29 Jun 2021 07:05:54 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 29 Jun 2021 07:05:54 +0800 From: To: , CC: , , , , , , , , , , , , , , , Subject: [PATCH v3] mt76: mt7921: add .set_sar_specs support Date: Tue, 29 Jun 2021 07:05:53 +0800 Message-ID: <212c2ca86c3da877bc70be8bdc9fc3f93ca4ff45.1624920521.git.objelf@gmail.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: YN Chen add .set_sar_specs to allow configuring SAR power limitations on the frequency ranges from the userland. Co-developed-by: Sean Wang Signed-off-by: Sean Wang Signed-off-by: YN Chen --- v2: 1. loop enhancement with considering no overlapping freqs 2. error handling for devm_kcalloc 3. sanity check without acquire lock v3: 1. move cfg80211_sar_capa to mt76 core to provide a common ground to other mt76 station devices 2. remove uneccessary condition check because nl80211_set_sar_specs already did it --- drivers/net/wireless/mediatek/mt76/mac80211.c | 15 ++++++++ drivers/net/wireless/mediatek/mt76/mt76.h | 8 ++++ .../wireless/mediatek/mt76/mt76_connac_mcu.c | 30 ++++++++++++++- .../net/wireless/mediatek/mt76/mt7921/init.c | 17 ++++++++- .../net/wireless/mediatek/mt76/mt7921/main.c | 38 +++++++++++++++++++ 5 files changed, 105 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c index d03aedc3286b..ee3a5b8d62d2 100644 --- a/drivers/net/wireless/mediatek/mt76/mac80211.c +++ b/drivers/net/wireless/mediatek/mt76/mac80211.c @@ -99,6 +99,21 @@ struct ieee80211_rate mt76_rates[] = { }; EXPORT_SYMBOL_GPL(mt76_rates); +static const struct cfg80211_sar_freq_ranges mt76_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, }, +}; + +const struct cfg80211_sar_capa mt76_sar_capa = { + .type = NL80211_SAR_TYPE_POWER, + .num_freq_ranges = ARRAY_SIZE(mt76_sar_freq_ranges), + .freq_ranges = &mt76_sar_freq_ranges[0], +}; +EXPORT_SYMBOL_GPL(mt76_sar_capa); + static int mt76_led_init(struct mt76_dev *dev) { struct device_node *np = dev->dev->of_node; diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h index 25c5ceef5257..ec42b87c9779 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76.h +++ b/drivers/net/wireless/mediatek/mt76/mt76.h @@ -545,6 +545,11 @@ struct mt76_rx_status { s8 chain_signal[IEEE80211_MAX_CHAINS]; }; +struct mt76_freq_range_power { + const struct cfg80211_sar_freq_ranges *range; + s8 power; +}; + struct mt76_testmode_ops { int (*set_state)(struct mt76_phy *phy, enum mt76_testmode_state state); int (*set_params)(struct mt76_phy *phy, struct nlattr **tb, @@ -636,6 +641,8 @@ struct mt76_phy { struct sk_buff **tail; u16 seqno; } rx_amsdu[__MT_RXQ_MAX]; + + struct mt76_freq_range_power *frp; }; struct mt76_dev { @@ -769,6 +776,7 @@ enum mt76_phy_type { } extern struct ieee80211_rate mt76_rates[12]; +extern const struct cfg80211_sar_capa mt76_sar_capa; #define __mt76_rr(dev, ...) (dev)->bus->rr((dev), __VA_ARGS__) #define __mt76_wr(dev, ...) (dev)->bus->wr((dev), __VA_ARGS__) diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c index 5c3a81e5f559..a2555dc0f003 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c @@ -1749,6 +1749,30 @@ 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) +{ + const struct cfg80211_sar_capa *capa = phy->hw->wiphy->sar_capa; + struct mt76_freq_range_power *frp = phy->frp; + int freq, i; + + if (!capa || !frp) + return target_power; + + freq = ieee80211_channel_to_frequency(chan->hw_value, chan->band); + for (i = 0 ; i < capa->num_freq_ranges; 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 +1840,13 @@ 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..865cf8192e34 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/init.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/init.c @@ -41,7 +41,7 @@ mt7921_regd_notifier(struct wiphy *wiphy, mt7921_mutex_release(dev); } -static void +static int mt7921_init_wiphy(struct ieee80211_hw *hw) { struct mt7921_phy *phy = mt7921_hw_phy(hw); @@ -75,6 +75,14 @@ mt7921_init_wiphy(struct ieee80211_hw *hw) wiphy->max_sched_scan_reqs = 1; wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH; wiphy->reg_notifier = mt7921_regd_notifier; + wiphy->sar_capa = &mt76_sar_capa; + + phy->mt76->frp = devm_kcalloc(dev->mt76.dev, + wiphy->sar_capa->num_freq_ranges, + sizeof(struct mt76_freq_range_power), + GFP_KERNEL); + if (!phy->mt76->frp) + return -ENOMEM; wiphy->features |= NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR | NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR; @@ -92,6 +100,8 @@ mt7921_init_wiphy(struct ieee80211_hw *hw) ieee80211_hw_set(hw, CONNECTION_MONITOR); hw->max_tx_fragments = 4; + + return 0; } static void @@ -207,7 +217,10 @@ int mt7921_register_device(struct mt7921_dev *dev) if (ret) return ret; - mt7921_init_wiphy(hw); + ret = mt7921_init_wiphy(hw); + if (ret) + return ret; + dev->mphy.sband_2g.sband.ht_cap.cap |= IEEE80211_HT_CAP_LDPC_CODING | IEEE80211_HT_CAP_MAX_AMSDU; diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c index 7fd21049ff5a..c96a0d5408d9 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c @@ -1171,6 +1171,43 @@ static void mt7921_sta_set_decap_offload(struct ieee80211_hw *hw, MCU_UNI_CMD_STA_REC_UPDATE); } +static int mt7921_set_sar_specs(struct ieee80211_hw *hw, + const struct cfg80211_sar_specs *sar) +{ + const struct cfg80211_sar_capa *capa = hw->wiphy->sar_capa; + struct mt7921_dev *dev = mt7921_hw_dev(hw); + struct mt76_freq_range_power *data, *frp; + struct mt76_phy *mphy = hw->priv; + int err; + u32 i; + + if (sar->type != NL80211_SAR_TYPE_POWER || !sar->num_sub_specs) + return -EINVAL; + + mt7921_mutex_acquire(dev); + + data = mphy->frp; + + for (i = 0; i < sar->num_sub_specs; i++) { + u32 index = sar->sub_specs[i].freq_range_index; + /* SAR specifies power limitaton in 0.25dbm */ + s32 power = sar->sub_specs[i].power >> 1; + + if (power > 127 || power < -127) + power = 127; + + frp = &data[index]; + frp->range = &capa->freq_ranges[index]; + frp->power = power; + } + + err = mt76_connac_mcu_set_rate_txpower(mphy); + + mt7921_mutex_release(dev); + + return err; +} + const struct ieee80211_ops mt7921_ops = { .tx = mt7921_tx, .start = mt7921_start, @@ -1209,4 +1246,5 @@ const struct ieee80211_ops mt7921_ops = { .set_rekey_data = mt7921_set_rekey_data, #endif /* CONFIG_PM */ .flush = mt7921_flush, + .set_sar_specs = mt7921_set_sar_specs, };