From: Zong-Zhe Yang Date: Wed, 9 Jul 2025 06:50:05 +0000 (+0800) Subject: wifi: rtw89: regd/acpi: support regulatory rules via ACPI DSM and parse rule of regd_UK X-Git-Tag: io_uring-6.17-20250815~128^2~34^2~50^2~27 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=08fbc2b6881b5228cb961b1efa6cb4bf41193105;p=linux-block.git wifi: rtw89: regd/acpi: support regulatory rules via ACPI DSM and parse rule of regd_UK ACPI DSM function 10 is defined for the enablement for Realtek regulatory rules. The first rule is whether to allow regd_UK regulatory settings or not. If not, the strict one, i.e. regd_ETSI, regulatory settings will be used on country GB. Signed-off-by: Zong-Zhe Yang Signed-off-by: Ping-Ke Shih Link: https://patch.msgid.link/20250709065006.32028-4-pkshih@realtek.com --- diff --git a/drivers/net/wireless/realtek/rtw89/acpi.c b/drivers/net/wireless/realtek/rtw89/acpi.c index 581d6d4154d3..c35a36e0f4d9 100644 --- a/drivers/net/wireless/realtek/rtw89/acpi.c +++ b/drivers/net/wireless/realtek/rtw89/acpi.c @@ -279,6 +279,51 @@ static int rtw89_acpi_dsm_get_policy_tas(struct rtw89_dev *rtwdev, return 0; } +static +bool chk_acpi_policy_reg_rules_sig(const struct rtw89_acpi_policy_reg_rules *p) +{ + return p->signature[0] == 0x52 && + p->signature[1] == 0x54 && + p->signature[2] == 0x4B && + p->signature[3] == 0x0A; +} + +static +int rtw89_acpi_dsm_get_policy_reg_rules(struct rtw89_dev *rtwdev, + union acpi_object *obj, + struct rtw89_acpi_policy_reg_rules **policy) +{ + const struct rtw89_acpi_policy_reg_rules *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_reg_rules_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_reg_rules: ", *policy, + sizeof(*ptr)); + return 0; +} + int rtw89_acpi_evaluate_dsm(struct rtw89_dev *rtwdev, enum rtw89_acpi_dsm_func func, struct rtw89_acpi_dsm_result *res) @@ -302,6 +347,9 @@ int rtw89_acpi_evaluate_dsm(struct rtw89_dev *rtwdev, &res->u.policy_6ghz_sp); 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) + ret = rtw89_acpi_dsm_get_policy_reg_rules(rtwdev, obj, + &res->u.policy_reg_rules); else ret = rtw89_acpi_dsm_get_value(rtwdev, obj, &res->u.value); diff --git a/drivers/net/wireless/realtek/rtw89/acpi.h b/drivers/net/wireless/realtek/rtw89/acpi.h index 8cf261505539..5811afebc2e6 100644 --- a/drivers/net/wireless/realtek/rtw89/acpi.h +++ b/drivers/net/wireless/realtek/rtw89/acpi.h @@ -19,6 +19,7 @@ enum rtw89_acpi_dsm_func { RTW89_ACPI_DSM_FUNC_TAS_EN = 5, RTW89_ACPI_DSM_FUNC_UNII4_SUP = 6, RTW89_ACPI_DSM_FUNC_6GHZ_SP_SUP = 7, + RTW89_ACPI_DSM_FUNC_REG_RULES_EN = 10, }; enum rtw89_acpi_conf_unii4 { @@ -75,6 +76,17 @@ struct rtw89_acpi_policy_tas { u8 rsvd[3]; } __packed; +enum rtw89_acpi_conf_reg_rules { + RTW89_ACPI_CONF_REG_RULE_REGD_UK = BIT(0), +}; + +struct rtw89_acpi_policy_reg_rules { + u8 signature[4]; + u8 revision; + u8 conf; + u8 rsvd[3]; +} __packed; + struct rtw89_acpi_dsm_result { union { u8 value; @@ -82,6 +94,7 @@ struct rtw89_acpi_dsm_result { struct rtw89_acpi_policy_6ghz *policy_6ghz; struct rtw89_acpi_policy_6ghz_sp *policy_6ghz_sp; 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/regd.c b/drivers/net/wireless/realtek/rtw89/regd.c index ea44b8311cb2..42678ff2a045 100644 --- a/drivers/net/wireless/realtek/rtw89/regd.c +++ b/drivers/net/wireless/realtek/rtw89/regd.c @@ -608,6 +608,30 @@ const char *rtw89_regd_get_string(enum rtw89_regulation_type regd) return rtw89_regd_string[regd]; } +static void rtw89_regd_setup_reg_rules(struct rtw89_dev *rtwdev) +{ + struct rtw89_regulatory_info *regulatory = &rtwdev->regulatory; + const struct rtw89_acpi_policy_reg_rules *ptr; + struct rtw89_acpi_dsm_result res = {}; + int ret; + + regulatory->txpwr_uk_follow_etsi = true; + + ret = rtw89_acpi_evaluate_dsm(rtwdev, RTW89_ACPI_DSM_FUNC_REG_RULES_EN, &res); + if (ret) { + rtw89_debug(rtwdev, RTW89_DBG_REGD, + "acpi: cannot eval policy reg-rules: %d\n", ret); + return; + } + + ptr = res.u.policy_reg_rules; + + regulatory->txpwr_uk_follow_etsi = + !u8_get_bits(ptr->conf, RTW89_ACPI_CONF_REG_RULE_REGD_UK); + + kfree(ptr); +} + int rtw89_regd_setup(struct rtw89_dev *rtwdev) { struct rtw89_regulatory_info *regulatory = &rtwdev->regulatory; @@ -624,7 +648,8 @@ int rtw89_regd_setup(struct rtw89_dev *rtwdev) } regulatory->reg_6ghz_power = RTW89_REG_6GHZ_POWER_DFLT; - regulatory->txpwr_uk_follow_etsi = true; + + rtw89_regd_setup_reg_rules(rtwdev); if (!wiphy) return -EINVAL;