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wifi: rtw89: acpi: process 6 GHz SP policy from ACPI DSM

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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@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://msgid.link/20240412115729.8316-8-pkshih@realtek.com
This commit is contained in:
Zong-Zhe Yang 2024-04-12 19:57:28 +08:00 committed by Ping-Ke Shih
parent d3c846367e
commit d03aeddf34
2 changed files with 61 additions and 0 deletions
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47
drivers/net/wireless/realtek/rtw89/acpi.c
View File

@ -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);

14
drivers/net/wireless/realtek/rtw89/acpi.h
View File

@ -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;
};