From: Zong-Zhe Yang <kevin_yang@xxxxxxxxxxx>
Realtek ACPI DSM func 7, RTW89_ACPI_DSM_FUNC_6GHZ_SP_SUP, accepts a format
via ACPI buffer as below.
| index | description |
--------------------------------------------
| [0-3] | signature |
| [4] | revision |
| [5] | override driver settings, or not |
| [6] | configuration if override |
| [7] | reserved |
where field of [6] is a bitmap by country,
and for now, only define BIT(0) is for US.
Through this function with overriding, BIOS can indicate to allow/block
6 GHz SP power by country.
Signed-off-by: Zong-Zhe Yang <kevin_yang@xxxxxxxxxxx>
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
---
drivers/net/wireless/realtek/rtw89/acpi.c | 47 +++++++++++++++++++++++
drivers/net/wireless/realtek/rtw89/acpi.h | 14 +++++++
2 files changed, 61 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtw89/acpi.c b/drivers/net/wireless/realtek/rtw89/acpi.c
index 2e7326a8e3e4..908e980a4b72 100644
--- a/drivers/net/wireless/realtek/rtw89/acpi.c
+++ b/drivers/net/wireless/realtek/rtw89/acpi.c
@@ -77,6 +77,50 @@ int rtw89_acpi_dsm_get_policy_6ghz(struct rtw89_dev *rtwdev,
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,
struct rtw89_acpi_dsm_result *res)
@@ -95,6 +139,9 @@ int rtw89_acpi_evaluate_dsm(struct rtw89_dev *rtwdev,
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);
diff --git a/drivers/net/wireless/realtek/rtw89/acpi.h b/drivers/net/wireless/realtek/rtw89/acpi.h
index 5182797e68b6..d274be1775bf 100644
--- a/drivers/net/wireless/realtek/rtw89/acpi.h
+++ b/drivers/net/wireless/realtek/rtw89/acpi.h
@@ -13,6 +13,7 @@ enum rtw89_acpi_dsm_func {
RTW89_ACPI_DSM_FUNC_6G_BP = 4,
RTW89_ACPI_DSM_FUNC_TAS_EN = 5,
RTW89_ACPI_DSM_FUNC_UNII4_SUP = 6,
+ RTW89_ACPI_DSM_FUNC_6GHZ_SP_SUP = 7,
};
enum rtw89_acpi_conf_unii4 {
@@ -41,11 +42,24 @@ struct rtw89_acpi_policy_6ghz {
struct rtw89_acpi_country_code country_list[] __counted_by(country_count);
} __packed;
+enum rtw89_acpi_conf_6ghz_sp {
+ RTW89_ACPI_CONF_6GHZ_SP_US = BIT(0),
+};
+
+struct rtw89_acpi_policy_6ghz_sp {
+ u8 signature[4];
+ u8 revision;
+ u8 override;
+ u8 conf;
+ u8 rsvd;
+} __packed;
+
struct rtw89_acpi_dsm_result {
union {
u8 value;
/* caller needs to free it after using */
struct rtw89_acpi_policy_6ghz *policy_6ghz;
+ struct rtw89_acpi_policy_6ghz_sp *policy_6ghz_sp;
} u;
};
--
2.25.1
