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f1375ec1 ML |
1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* | |
3 | * linux/include/linux/amd-pstate.h | |
4 | * | |
5 | * Copyright (C) 2022 Advanced Micro Devices, Inc. | |
6 | * | |
7 | * Author: Meng Li <li.meng@amd.com> | |
8 | */ | |
9 | ||
10 | #ifndef _LINUX_AMD_PSTATE_H | |
11 | #define _LINUX_AMD_PSTATE_H | |
12 | ||
13 | #include <linux/pm_qos.h> | |
14 | ||
ffa5096a PY |
15 | #define AMD_CPPC_EPP_PERFORMANCE 0x00 |
16 | #define AMD_CPPC_EPP_BALANCE_PERFORMANCE 0x80 | |
17 | #define AMD_CPPC_EPP_BALANCE_POWERSAVE 0xBF | |
18 | #define AMD_CPPC_EPP_POWERSAVE 0xFF | |
19 | ||
f1375ec1 ML |
20 | /********************************************************************* |
21 | * AMD P-state INTERFACE * | |
22 | *********************************************************************/ | |
23 | /** | |
24 | * struct amd_aperf_mperf | |
25 | * @aperf: actual performance frequency clock count | |
26 | * @mperf: maximum performance frequency clock count | |
27 | * @tsc: time stamp counter | |
28 | */ | |
29 | struct amd_aperf_mperf { | |
30 | u64 aperf; | |
31 | u64 mperf; | |
32 | u64 tsc; | |
33 | }; | |
34 | ||
35 | /** | |
36 | * struct amd_cpudata - private CPU data for AMD P-State | |
37 | * @cpu: CPU number | |
38 | * @req: constraint request to apply | |
39 | * @cppc_req_cached: cached performance request hints | |
40 | * @highest_perf: the maximum performance an individual processor may reach, | |
41 | * assuming ideal conditions | |
42 | * @nominal_perf: the maximum sustained performance level of the processor, | |
43 | * assuming ideal operating conditions | |
44 | * @lowest_nonlinear_perf: the lowest performance level at which nonlinear power | |
45 | * savings are achieved | |
46 | * @lowest_perf: the absolute lowest performance level of the processor | |
47 | * @max_freq: the frequency that mapped to highest_perf | |
48 | * @min_freq: the frequency that mapped to lowest_perf | |
49 | * @nominal_freq: the frequency that mapped to nominal_perf | |
50 | * @lowest_nonlinear_freq: the frequency that mapped to lowest_nonlinear_perf | |
51 | * @cur: Difference of Aperf/Mperf/tsc count between last and current sample | |
52 | * @prev: Last Aperf/Mperf/tsc count value read from register | |
53 | * @freq: current cpu frequency value | |
54 | * @boost_supported: check whether the Processor or SBIOS supports boost mode | |
ffa5096a PY |
55 | * @epp_policy: Last saved policy used to set energy-performance preference |
56 | * @epp_cached: Cached CPPC energy-performance preference value | |
57 | * @policy: Cpufreq policy value | |
58 | * @cppc_cap1_cached Cached MSR_AMD_CPPC_CAP1 register value | |
f1375ec1 ML |
59 | * |
60 | * The amd_cpudata is key private data for each CPU thread in AMD P-State, and | |
61 | * represents all the attributes and goals that AMD P-State requests at runtime. | |
62 | */ | |
63 | struct amd_cpudata { | |
64 | int cpu; | |
65 | ||
66 | struct freq_qos_request req[2]; | |
67 | u64 cppc_req_cached; | |
68 | ||
69 | u32 highest_perf; | |
70 | u32 nominal_perf; | |
71 | u32 lowest_nonlinear_perf; | |
72 | u32 lowest_perf; | |
73 | ||
74 | u32 max_freq; | |
75 | u32 min_freq; | |
76 | u32 nominal_freq; | |
77 | u32 lowest_nonlinear_freq; | |
78 | ||
79 | struct amd_aperf_mperf cur; | |
80 | struct amd_aperf_mperf prev; | |
81 | ||
82 | u64 freq; | |
83 | bool boost_supported; | |
ffa5096a PY |
84 | |
85 | /* EPP feature related attributes*/ | |
86 | s16 epp_policy; | |
87 | s16 epp_cached; | |
88 | u32 policy; | |
89 | u64 cppc_cap1_cached; | |
d4da12f8 | 90 | bool suspended; |
f1375ec1 ML |
91 | }; |
92 | ||
36c5014e WK |
93 | /* |
94 | * enum amd_pstate_mode - driver working mode of amd pstate | |
95 | */ | |
96 | enum amd_pstate_mode { | |
97 | AMD_PSTATE_DISABLE = 0, | |
98 | AMD_PSTATE_PASSIVE, | |
99 | AMD_PSTATE_ACTIVE, | |
2dd6d0eb | 100 | AMD_PSTATE_GUIDED, |
36c5014e WK |
101 | AMD_PSTATE_MAX, |
102 | }; | |
103 | ||
104 | static const char * const amd_pstate_mode_string[] = { | |
105 | [AMD_PSTATE_DISABLE] = "disable", | |
106 | [AMD_PSTATE_PASSIVE] = "passive", | |
107 | [AMD_PSTATE_ACTIVE] = "active", | |
2dd6d0eb | 108 | [AMD_PSTATE_GUIDED] = "guided", |
36c5014e WK |
109 | NULL, |
110 | }; | |
f1375ec1 | 111 | #endif /* _LINUX_AMD_PSTATE_H */ |