diff options
Diffstat (limited to 'acpi.c')
| -rw-r--r-- | acpi.c | 128 |
1 files changed, 113 insertions, 15 deletions
@@ -12,27 +12,118 @@ static const guid_t rtw89_guid = GUID_INIT(0xD2A8C3E8, 0x4B69, 0x4F00, 0x82, 0xBD, 0xFE, 0x86, 0x07, 0x80, 0x3A, 0xA7); -static int rtw89_acpi_dsm_get(struct rtw89_dev *rtwdev, union acpi_object *obj, - u8 *value) +static +int rtw89_acpi_dsm_get_value(struct rtw89_dev *rtwdev, union acpi_object *obj, + u8 *value) { - switch (obj->type) { - case ACPI_TYPE_INTEGER: - *value = (u8)obj->integer.value; - break; - case ACPI_TYPE_BUFFER: - *value = obj->buffer.pointer[0]; - break; - default: - rtw89_debug(rtwdev, RTW89_DBG_UNEXP, - "acpi dsm return unhandled type: %d\n", obj->type); + if (obj->type != ACPI_TYPE_INTEGER) { + rtw89_debug(rtwdev, RTW89_DBG_ACPI, + "acpi: expect integer but type: %d\n", obj->type); return -EINVAL; } + *value = (u8)obj->integer.value; + return 0; +} + +static bool chk_acpi_policy_6ghz_sig(const struct rtw89_acpi_policy_6ghz *p) +{ + return p->signature[0] == 0x00 && + p->signature[1] == 0xE0 && + p->signature[2] == 0x4C; +} + +static +int rtw89_acpi_dsm_get_policy_6ghz(struct rtw89_dev *rtwdev, + union acpi_object *obj, + struct rtw89_acpi_policy_6ghz **policy_6ghz) +{ + const struct rtw89_acpi_policy_6ghz *ptr; + u32 expect_len; + u32 len; + + if (obj->type != ACPI_TYPE_BUFFER) { + rtw89_debug(rtwdev, RTW89_DBG_ACPI, + "acpi: expect buffer but type: %d\n", obj->type); + return -EINVAL; + } + + len = obj->buffer.length; + if (len < sizeof(*ptr)) { + rtw89_debug(rtwdev, RTW89_DBG_ACPI, "%s: invalid buffer length: %u\n", + __func__, len); + return -EINVAL; + } + + ptr = (typeof(ptr))obj->buffer.pointer; + if (!chk_acpi_policy_6ghz_sig(ptr)) { + rtw89_debug(rtwdev, RTW89_DBG_ACPI, "%s: bad signature\n", __func__); + return -EINVAL; + } + + expect_len = struct_size(ptr, country_list, ptr->country_count); + if (len < expect_len) { + rtw89_debug(rtwdev, RTW89_DBG_ACPI, "%s: expect %u but length: %u\n", + __func__, expect_len, len); + return -EINVAL; + } + + *policy_6ghz = kmemdup(ptr, expect_len, GFP_KERNEL); + if (!*policy_6ghz) + return -ENOMEM; + + rtw89_hex_dump(rtwdev, RTW89_DBG_ACPI, "policy_6ghz: ", *policy_6ghz, + expect_len); + return 0; +} + +static bool chk_acpi_policy_6ghz_sp_sig(const struct rtw89_acpi_policy_6ghz_sp *p) +{ + return p->signature[0] == 0x52 && + p->signature[1] == 0x54 && + p->signature[2] == 0x4B && + p->signature[3] == 0x07; +} + +static +int rtw89_acpi_dsm_get_policy_6ghz_sp(struct rtw89_dev *rtwdev, + union acpi_object *obj, + struct rtw89_acpi_policy_6ghz_sp **policy) +{ + const struct rtw89_acpi_policy_6ghz_sp *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_sp_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_sp: ", *policy, + sizeof(*ptr)); return 0; } int rtw89_acpi_evaluate_dsm(struct rtw89_dev *rtwdev, - enum rtw89_acpi_dsm_func func, u8 *value) + enum rtw89_acpi_dsm_func func, + struct rtw89_acpi_dsm_result *res) { union acpi_object *obj; int ret; @@ -40,12 +131,19 @@ int rtw89_acpi_evaluate_dsm(struct rtw89_dev *rtwdev, obj = acpi_evaluate_dsm(ACPI_HANDLE(rtwdev->dev), &rtw89_guid, 0, func, NULL); if (!obj) { - rtw89_debug(rtwdev, RTW89_DBG_UNEXP, + rtw89_debug(rtwdev, RTW89_DBG_ACPI, "acpi dsm fail to evaluate func: %d\n", func); return -ENOENT; } - ret = rtw89_acpi_dsm_get(rtwdev, obj, value); + if (func == RTW89_ACPI_DSM_FUNC_6G_BP) + ret = rtw89_acpi_dsm_get_policy_6ghz(rtwdev, obj, + &res->u.policy_6ghz); + 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 + ret = rtw89_acpi_dsm_get_value(rtwdev, obj, &res->u.value); ACPI_FREE(obj); return ret; |