1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright(c) 2021-2023 Realtek Corporation
*/
#include <linux/acpi.h>
#include <linux/uuid.h>
#include "acpi.h"
#include "debug.h"
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_value(struct rtw89_dev *rtwdev, union acpi_object *obj,
u8 *value)
{
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,
struct rtw89_acpi_dsm_result *res)
{
union acpi_object *obj;
int ret;
obj = acpi_evaluate_dsm(ACPI_HANDLE(rtwdev->dev), &rtw89_guid,
0, func, NULL);
if (!obj) {
rtw89_debug(rtwdev, RTW89_DBG_ACPI,
"acpi dsm fail to evaluate func: %d\n", func);
return -ENOENT;
}
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;
}
|
