| // SPDX-License-Identifier: GPL-2.0 | |
| #if defined(__i386__) || defined(__x86_64__) | |
| #include <unistd.h> | |
| #include <errno.h> | |
| #include <stdio.h> | |
| #include <stdint.h> | |
| #include <pci/pci.h> | |
| #include "helpers/helpers.h" | |
| #include "cpufreq.h" | |
| #include "acpi_cppc.h" | |
| /* ACPI P-States Helper Functions for AMD Processors ***************/ | |
| #define MSR_AMD_PSTATE_STATUS 0xc0010063 | |
| #define MSR_AMD_PSTATE 0xc0010064 | |
| #define MSR_AMD_PSTATE_LIMIT 0xc0010061 | |
| union core_pstate { | |
| /* pre fam 17h: */ | |
| struct { | |
| unsigned fid:6; | |
| unsigned did:3; | |
| unsigned vid:7; | |
| unsigned res1:6; | |
| unsigned nbdid:1; | |
| unsigned res2:2; | |
| unsigned nbvid:7; | |
| unsigned iddval:8; | |
| unsigned idddiv:2; | |
| unsigned res3:21; | |
| unsigned en:1; | |
| } pstate; | |
| /* since fam 17h: */ | |
| struct { | |
| unsigned fid:8; | |
| unsigned did:6; | |
| unsigned vid:8; | |
| unsigned iddval:8; | |
| unsigned idddiv:2; | |
| unsigned res1:31; | |
| unsigned en:1; | |
| } pstatedef; | |
| /* since fam 1Ah: */ | |
| struct { | |
| unsigned fid:12; | |
| unsigned res1:2; | |
| unsigned vid:8; | |
| unsigned iddval:8; | |
| unsigned idddiv:2; | |
| unsigned res2:31; | |
| unsigned en:1; | |
| } pstatedef2; | |
| unsigned long long val; | |
| }; | |
| static int get_did(union core_pstate pstate) | |
| { | |
| int t; | |
| /* Fam 1Ah onward do not use did */ | |
| if (cpupower_cpu_info.family >= 0x1A) | |
| return 0; | |
| if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF) | |
| t = pstate.pstatedef.did; | |
| else if (cpupower_cpu_info.family == 0x12) | |
| t = pstate.val & 0xf; | |
| else | |
| t = pstate.pstate.did; | |
| return t; | |
| } | |
| static int get_cof(union core_pstate pstate) | |
| { | |
| int t; | |
| int fid, did, cof = 0; | |
| did = get_did(pstate); | |
| if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF) { | |
| if (cpupower_cpu_info.family >= 0x1A) { | |
| fid = pstate.pstatedef2.fid; | |
| if (fid > 0x0f) | |
| cof = (fid * 5); | |
| } else { | |
| fid = pstate.pstatedef.fid; | |
| cof = 200 * fid / did; | |
| } | |
| } else { | |
| t = 0x10; | |
| fid = pstate.pstate.fid; | |
| if (cpupower_cpu_info.family == 0x11) | |
| t = 0x8; | |
| cof = (100 * (fid + t)) >> did; | |
| } | |
| return cof; | |
| } | |
| /* Needs: | |
| * cpu -> the cpu that gets evaluated | |
| * boost_states -> how much boost states the machines support | |
| * | |
| * Fills up: | |
| * pstates -> a pointer to an array of size MAX_HW_PSTATES | |
| * must be initialized with zeros. | |
| * All available HW pstates (including boost states) | |
| * no -> amount of pstates above array got filled up with | |
| * | |
| * returns zero on success, -1 on failure | |
| */ | |
| int decode_pstates(unsigned int cpu, int boost_states, | |
| unsigned long *pstates, int *no) | |
| { | |
| int i, psmax; | |
| union core_pstate pstate; | |
| unsigned long long val; | |
| /* Only read out frequencies from HW if HW Pstate is supported, | |
| * otherwise frequencies are exported via ACPI tables. | |
| */ | |
| if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_HW_PSTATE)) | |
| return -1; | |
| if (read_msr(cpu, MSR_AMD_PSTATE_LIMIT, &val)) | |
| return -1; | |
| psmax = (val >> 4) & 0x7; | |
| psmax += boost_states; | |
| for (i = 0; i <= psmax; i++) { | |
| if (i >= MAX_HW_PSTATES) { | |
| fprintf(stderr, "HW pstates [%d] exceeding max [%d]\n", | |
| psmax, MAX_HW_PSTATES); | |
| return -1; | |
| } | |
| if (read_msr(cpu, MSR_AMD_PSTATE + i, &pstate.val)) | |
| return -1; | |
| /* The enabled bit (bit 63) is common for all families */ | |
| if (!pstate.pstatedef.en) | |
| continue; | |
| pstates[i] = get_cof(pstate); | |
| } | |
| *no = i; | |
| return 0; | |
| } | |
| int amd_pci_get_num_boost_states(int *active, int *states) | |
| { | |
| struct pci_access *pci_acc; | |
| struct pci_dev *device; | |
| uint8_t val = 0; | |
| *active = *states = 0; | |
| device = pci_slot_func_init(&pci_acc, 0x18, 4); | |
| if (device == NULL) | |
| return -ENODEV; | |
| val = pci_read_byte(device, 0x15c); | |
| if (val & 3) | |
| *active = 1; | |
| else | |
| *active = 0; | |
| *states = (val >> 2) & 7; | |
| pci_cleanup(pci_acc); | |
| return 0; | |
| } | |
| /* ACPI P-States Helper Functions for AMD Processors ***************/ | |
| /* AMD P-State Helper Functions ************************************/ | |
| enum amd_pstate_value { | |
| AMD_PSTATE_HIGHEST_PERF, | |
| AMD_PSTATE_MAX_FREQ, | |
| AMD_PSTATE_LOWEST_NONLINEAR_FREQ, | |
| AMD_PSTATE_HW_PREFCORE, | |
| AMD_PSTATE_PREFCORE_RANKING, | |
| MAX_AMD_PSTATE_VALUE_READ_FILES, | |
| }; | |
| static const char *amd_pstate_value_files[MAX_AMD_PSTATE_VALUE_READ_FILES] = { | |
| [AMD_PSTATE_HIGHEST_PERF] = "amd_pstate_highest_perf", | |
| [AMD_PSTATE_MAX_FREQ] = "amd_pstate_max_freq", | |
| [AMD_PSTATE_LOWEST_NONLINEAR_FREQ] = "amd_pstate_lowest_nonlinear_freq", | |
| [AMD_PSTATE_HW_PREFCORE] = "amd_pstate_hw_prefcore", | |
| [AMD_PSTATE_PREFCORE_RANKING] = "amd_pstate_prefcore_ranking", | |
| }; | |
| static unsigned long amd_pstate_get_data(unsigned int cpu, | |
| enum amd_pstate_value value) | |
| { | |
| return cpufreq_get_sysfs_value_from_table(cpu, | |
| amd_pstate_value_files, | |
| value, | |
| MAX_AMD_PSTATE_VALUE_READ_FILES); | |
| } | |
| void amd_pstate_boost_init(unsigned int cpu, int *support, int *active) | |
| { | |
| unsigned long highest_perf, nominal_perf, cpuinfo_min, | |
| cpuinfo_max, amd_pstate_max; | |
| highest_perf = amd_pstate_get_data(cpu, AMD_PSTATE_HIGHEST_PERF); | |
| nominal_perf = acpi_cppc_get_data(cpu, NOMINAL_PERF); | |
| *support = highest_perf > nominal_perf ? 1 : 0; | |
| if (!(*support)) | |
| return; | |
| cpufreq_get_hardware_limits(cpu, &cpuinfo_min, &cpuinfo_max); | |
| amd_pstate_max = amd_pstate_get_data(cpu, AMD_PSTATE_MAX_FREQ); | |
| *active = cpuinfo_max == amd_pstate_max ? 1 : 0; | |
| } | |
| void amd_pstate_show_perf_and_freq(unsigned int cpu, int no_rounding) | |
| { | |
| printf(_(" amd-pstate limits:\n")); | |
| printf(_(" Highest Performance: %lu. Maximum Frequency: "), | |
| amd_pstate_get_data(cpu, AMD_PSTATE_HIGHEST_PERF)); | |
| /* | |
| * If boost isn't active, the cpuinfo_max doesn't indicate real max | |
| * frequency. So we read it back from amd-pstate sysfs entry. | |
| */ | |
| print_speed(amd_pstate_get_data(cpu, AMD_PSTATE_MAX_FREQ), no_rounding); | |
| printf(".\n"); | |
| printf(_(" Nominal Performance: %lu. Nominal Frequency: "), | |
| acpi_cppc_get_data(cpu, NOMINAL_PERF)); | |
| print_speed(acpi_cppc_get_data(cpu, NOMINAL_FREQ) * 1000, | |
| no_rounding); | |
| printf(".\n"); | |
| printf(_(" Lowest Non-linear Performance: %lu. Lowest Non-linear Frequency: "), | |
| acpi_cppc_get_data(cpu, LOWEST_NONLINEAR_PERF)); | |
| print_speed(amd_pstate_get_data(cpu, AMD_PSTATE_LOWEST_NONLINEAR_FREQ), | |
| no_rounding); | |
| printf(".\n"); | |
| printf(_(" Lowest Performance: %lu. Lowest Frequency: "), | |
| acpi_cppc_get_data(cpu, LOWEST_PERF)); | |
| print_speed(acpi_cppc_get_data(cpu, LOWEST_FREQ) * 1000, no_rounding); | |
| printf(".\n"); | |
| printf(_(" Preferred Core Support: %lu. Preferred Core Ranking: %lu.\n"), | |
| amd_pstate_get_data(cpu, AMD_PSTATE_HW_PREFCORE), | |
| amd_pstate_get_data(cpu, AMD_PSTATE_PREFCORE_RANKING)); | |
| } | |
| /* AMD P-State Helper Functions ************************************/ | |
| #endif /* defined(__i386__) || defined(__x86_64__) */ |