From: Zong-Zhe Yang Date: Wed, 9 Jul 2025 06:50:06 +0000 (+0800) Subject: wifi: rtw89: regd/acpi: support 6 GHz VLP policy via ACPI DSM X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=b99d7cd36da835544da02d75b6398eb7b26412ee;p=users%2Fwilly%2Fxarray.git wifi: rtw89: regd/acpi: support 6 GHz VLP policy via ACPI DSM Process ACPI DSM function 11 to get 6 GHz VLP support by country. If not allowed, return error to block the connection. By default, i.e. ACPI DSM function is not configured, disallow 6 GHz VLP on country US and country CA, because some platform-level certifications are needed in FCC regulation before operating on 6 GHz VLP connection. Signed-off-by: Zong-Zhe Yang Signed-off-by: Ping-Ke Shih Link: https://patch.msgid.link/20250709065006.32028-5-pkshih@realtek.com --- diff --git a/drivers/net/wireless/realtek/rtw89/acpi.c b/drivers/net/wireless/realtek/rtw89/acpi.c index c35a36e0f4d9..f1e758a5f32b 100644 --- a/drivers/net/wireless/realtek/rtw89/acpi.c +++ b/drivers/net/wireless/realtek/rtw89/acpi.c @@ -236,6 +236,50 @@ int rtw89_acpi_dsm_get_policy_6ghz_sp(struct rtw89_dev *rtwdev, return 0; } +static bool chk_acpi_policy_6ghz_vlp_sig(const struct rtw89_acpi_policy_6ghz_vlp *p) +{ + return p->signature[0] == 0x52 && + p->signature[1] == 0x54 && + p->signature[2] == 0x4B && + p->signature[3] == 0x0B; +} + +static +int rtw89_acpi_dsm_get_policy_6ghz_vlp(struct rtw89_dev *rtwdev, + union acpi_object *obj, + struct rtw89_acpi_policy_6ghz_vlp **policy) +{ + const struct rtw89_acpi_policy_6ghz_vlp *ptr; + u32 buf_len; + + if (obj->type != ACPI_TYPE_BUFFER) { + rtw89_debug(rtwdev, RTW89_DBG_ACPI, + "acpi: expect buffer but type: %d\n", obj->type); + return -EINVAL; + } + + buf_len = obj->buffer.length; + if (buf_len < sizeof(*ptr)) { + rtw89_debug(rtwdev, RTW89_DBG_ACPI, "%s: invalid buffer length: %u\n", + __func__, buf_len); + return -EINVAL; + } + + ptr = (typeof(ptr))obj->buffer.pointer; + if (!chk_acpi_policy_6ghz_vlp_sig(ptr)) { + rtw89_debug(rtwdev, RTW89_DBG_ACPI, "%s: bad signature\n", __func__); + return -EINVAL; + } + + *policy = kmemdup(ptr, sizeof(*ptr), GFP_KERNEL); + if (!*policy) + return -ENOMEM; + + rtw89_hex_dump(rtwdev, RTW89_DBG_ACPI, "policy_6ghz_vlp: ", *policy, + sizeof(*ptr)); + return 0; +} + static bool chk_acpi_policy_tas_sig(const struct rtw89_acpi_policy_tas *p) { return p->signature[0] == 0x52 && @@ -345,6 +389,9 @@ int rtw89_acpi_evaluate_dsm(struct rtw89_dev *rtwdev, else if (func == RTW89_ACPI_DSM_FUNC_6GHZ_SP_SUP) ret = rtw89_acpi_dsm_get_policy_6ghz_sp(rtwdev, obj, &res->u.policy_6ghz_sp); + else if (func == RTW89_ACPI_DSM_FUNC_6GHZ_VLP_SUP) + ret = rtw89_acpi_dsm_get_policy_6ghz_vlp(rtwdev, obj, + &res->u.policy_6ghz_vlp); else if (func == RTW89_ACPI_DSM_FUNC_TAS_EN) ret = rtw89_acpi_dsm_get_policy_tas(rtwdev, obj, &res->u.policy_tas); else if (func == RTW89_ACPI_DSM_FUNC_REG_RULES_EN) diff --git a/drivers/net/wireless/realtek/rtw89/acpi.h b/drivers/net/wireless/realtek/rtw89/acpi.h index 5811afebc2e6..48a46f2005b1 100644 --- a/drivers/net/wireless/realtek/rtw89/acpi.h +++ b/drivers/net/wireless/realtek/rtw89/acpi.h @@ -20,6 +20,7 @@ enum rtw89_acpi_dsm_func { RTW89_ACPI_DSM_FUNC_UNII4_SUP = 6, RTW89_ACPI_DSM_FUNC_6GHZ_SP_SUP = 7, RTW89_ACPI_DSM_FUNC_REG_RULES_EN = 10, + RTW89_ACPI_DSM_FUNC_6GHZ_VLP_SUP = 11, }; enum rtw89_acpi_conf_unii4 { @@ -68,6 +69,19 @@ struct rtw89_acpi_policy_6ghz_sp { u8 rsvd; } __packed; +enum rtw89_acpi_conf_6ghz_vlp { + RTW89_ACPI_CONF_6GHZ_VLP_US = BIT(0), + RTW89_ACPI_CONF_6GHZ_VLP_CA = BIT(1), +}; + +struct rtw89_acpi_policy_6ghz_vlp { + u8 signature[4]; + u8 revision; + u8 override; + u8 conf; + u8 rsvd; +} __packed; + struct rtw89_acpi_policy_tas { u8 signature[4]; u8 revision; @@ -93,6 +107,7 @@ struct rtw89_acpi_dsm_result { /* caller needs to free it after using */ struct rtw89_acpi_policy_6ghz *policy_6ghz; struct rtw89_acpi_policy_6ghz_sp *policy_6ghz_sp; + struct rtw89_acpi_policy_6ghz_vlp *policy_6ghz_vlp; struct rtw89_acpi_policy_tas *policy_tas; struct rtw89_acpi_policy_reg_rules *policy_reg_rules; } u; diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h index 1d8f89e83c9a..8c53c5db0cbc 100644 --- a/drivers/net/wireless/realtek/rtw89/core.h +++ b/drivers/net/wireless/realtek/rtw89/core.h @@ -5386,6 +5386,7 @@ struct rtw89_regulatory_info { DECLARE_BITMAP(block_unii4, RTW89_REGD_MAX_COUNTRY_NUM); DECLARE_BITMAP(block_6ghz, RTW89_REGD_MAX_COUNTRY_NUM); DECLARE_BITMAP(block_6ghz_sp, RTW89_REGD_MAX_COUNTRY_NUM); + DECLARE_BITMAP(block_6ghz_vlp, RTW89_REGD_MAX_COUNTRY_NUM); }; enum rtw89_ifs_clm_application { diff --git a/drivers/net/wireless/realtek/rtw89/regd.c b/drivers/net/wireless/realtek/rtw89/regd.c index 42678ff2a045..58582f8d2b74 100644 --- a/drivers/net/wireless/realtek/rtw89/regd.c +++ b/drivers/net/wireless/realtek/rtw89/regd.c @@ -521,6 +521,55 @@ out: kfree(ptr); } +static void rtw89_regd_setup_policy_6ghz_vlp(struct rtw89_dev *rtwdev) +{ + struct rtw89_regulatory_info *regulatory = &rtwdev->regulatory; + const struct rtw89_acpi_policy_6ghz_vlp *ptr = NULL; + struct rtw89_acpi_dsm_result res = {}; + bool enable; + u8 index; + int ret; + u8 val; + + /* By default, allow 6 GHz VLP on all countries except US and CA. */ + val = ~(RTW89_ACPI_CONF_6GHZ_VLP_US | RTW89_ACPI_CONF_6GHZ_VLP_CA); + + ret = rtw89_acpi_evaluate_dsm(rtwdev, RTW89_ACPI_DSM_FUNC_6GHZ_VLP_SUP, &res); + if (ret) { + rtw89_debug(rtwdev, RTW89_DBG_REGD, + "acpi: cannot eval policy 6ghz-vlp: %d\n", ret); + goto bottom; + } + + ptr = res.u.policy_6ghz_vlp; + + switch (ptr->override) { + default: + rtw89_debug(rtwdev, RTW89_DBG_REGD, + "%s: unknown override case: %d\n", __func__, + ptr->override); + fallthrough; + case 0: + break; + case 1: + val = ptr->conf; + break; + } + +bottom: + index = rtw89_regd_get_index_by_name(rtwdev, "US"); + enable = u8_get_bits(val, RTW89_ACPI_CONF_6GHZ_VLP_US); + if (!enable && index != RTW89_REGD_MAX_COUNTRY_NUM) + set_bit(index, regulatory->block_6ghz_vlp); + + index = rtw89_regd_get_index_by_name(rtwdev, "CA"); + enable = u8_get_bits(val, RTW89_ACPI_CONF_6GHZ_VLP_CA); + if (!enable && index != RTW89_REGD_MAX_COUNTRY_NUM) + set_bit(index, regulatory->block_6ghz_vlp); + + kfree(ptr); +} + static void rtw89_regd_setup_6ghz(struct rtw89_dev *rtwdev, struct wiphy *wiphy) { const struct rtw89_chip_info *chip = rtwdev->chip; @@ -564,6 +613,7 @@ bottom: if (regd_allow_6ghz) { rtw89_regd_setup_policy_6ghz(rtwdev); rtw89_regd_setup_policy_6ghz_sp(rtwdev); + rtw89_regd_setup_policy_6ghz_vlp(rtwdev); return; } @@ -1059,7 +1109,16 @@ static int rtw89_reg_6ghz_power_recalc(struct rtw89_dev *rtwdev, struct rtw89_vif_link *rtwvif_link, bool active, unsigned int *changed) { + struct rtw89_regulatory_info *regulatory = &rtwdev->regulatory; + const struct rtw89_regd *regd = regulatory->regd; + bool blocked[NUM_OF_RTW89_REG_6GHZ_POWER] = {}; + u8 index = rtw89_regd_get_index(rtwdev, regd); struct ieee80211_bss_conf *bss_conf; + bool dflt = false; + + if (index == RTW89_REGD_MAX_COUNTRY_NUM || + test_bit(index, regulatory->block_6ghz_vlp)) + blocked[RTW89_REG_6GHZ_POWER_VLP] = true; rcu_read_lock(); @@ -1078,6 +1137,7 @@ static int rtw89_reg_6ghz_power_recalc(struct rtw89_dev *rtwdev, break; default: rtwvif_link->reg_6ghz_power = RTW89_REG_6GHZ_POWER_DFLT; + dflt = true; break; } } else { @@ -1086,6 +1146,14 @@ static int rtw89_reg_6ghz_power_recalc(struct rtw89_dev *rtwdev, rcu_read_unlock(); + if (!dflt && blocked[rtwvif_link->reg_6ghz_power]) { + rtw89_debug(rtwdev, RTW89_DBG_REGD, + "%c%c 6 GHz power type-%u is blocked by policy\n", + regd->alpha2[0], regd->alpha2[1], + rtwvif_link->reg_6ghz_power); + return -EINVAL; + } + *changed += __rtw89_reg_6ghz_power_recalc(rtwdev); return 0; }