Merge tag 'soc-fixes-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
[linux-block.git] / include / linux / amd-pstate.h
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
15 /*********************************************************************
16  *                        AMD P-state INTERFACE                       *
17  *********************************************************************/
18 /**
19  * struct  amd_aperf_mperf
20  * @aperf: actual performance frequency clock count
21  * @mperf: maximum performance frequency clock count
22  * @tsc:   time stamp counter
23  */
24 struct amd_aperf_mperf {
25         u64 aperf;
26         u64 mperf;
27         u64 tsc;
28 };
29
30 /**
31  * struct amd_cpudata - private CPU data for AMD P-State
32  * @cpu: CPU number
33  * @req: constraint request to apply
34  * @cppc_req_cached: cached performance request hints
35  * @highest_perf: the maximum performance an individual processor may reach,
36  *                assuming ideal conditions
37  * @nominal_perf: the maximum sustained performance level of the processor,
38  *                assuming ideal operating conditions
39  * @lowest_nonlinear_perf: the lowest performance level at which nonlinear power
40  *                         savings are achieved
41  * @lowest_perf: the absolute lowest performance level of the processor
42  * @max_freq: the frequency that mapped to highest_perf
43  * @min_freq: the frequency that mapped to lowest_perf
44  * @nominal_freq: the frequency that mapped to nominal_perf
45  * @lowest_nonlinear_freq: the frequency that mapped to lowest_nonlinear_perf
46  * @cur: Difference of Aperf/Mperf/tsc count between last and current sample
47  * @prev: Last Aperf/Mperf/tsc count value read from register
48  * @freq: current cpu frequency value
49  * @boost_supported: check whether the Processor or SBIOS supports boost mode
50  *
51  * The amd_cpudata is key private data for each CPU thread in AMD P-State, and
52  * represents all the attributes and goals that AMD P-State requests at runtime.
53  */
54 struct amd_cpudata {
55         int     cpu;
56
57         struct  freq_qos_request req[2];
58         u64     cppc_req_cached;
59
60         u32     highest_perf;
61         u32     nominal_perf;
62         u32     lowest_nonlinear_perf;
63         u32     lowest_perf;
64
65         u32     max_freq;
66         u32     min_freq;
67         u32     nominal_freq;
68         u32     lowest_nonlinear_freq;
69
70         struct amd_aperf_mperf cur;
71         struct amd_aperf_mperf prev;
72
73         u64     freq;
74         bool    boost_supported;
75 };
76
77 #endif /* _LINUX_AMD_PSTATE_H */