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 <[email protected]>
   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 */