1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
27fe2f639SDominik Brodowski #if defined(__i386__) || defined(__x86_64__)
37fe2f639SDominik Brodowski #include <unistd.h>
47fe2f639SDominik Brodowski #include <errno.h>
57fe2f639SDominik Brodowski #include <stdio.h>
67fe2f639SDominik Brodowski #include <stdint.h>
77fe2f639SDominik Brodowski
87fe2f639SDominik Brodowski #include <pci/pci.h>
97fe2f639SDominik Brodowski
107fe2f639SDominik Brodowski #include "helpers/helpers.h"
1133e43f36SHuang Rui #include "cpufreq.h"
1233e43f36SHuang Rui #include "acpi_cppc.h"
137fe2f639SDominik Brodowski
1433e43f36SHuang Rui /* ACPI P-States Helper Functions for AMD Processors ***************/
157fe2f639SDominik Brodowski #define MSR_AMD_PSTATE_STATUS 0xc0010063
167fe2f639SDominik Brodowski #define MSR_AMD_PSTATE 0xc0010064
177fe2f639SDominik Brodowski #define MSR_AMD_PSTATE_LIMIT 0xc0010061
187fe2f639SDominik Brodowski
19629d512dSNathan Fontenot union core_pstate {
20629d512dSNathan Fontenot /* pre fam 17h: */
217fe2f639SDominik Brodowski struct {
227fe2f639SDominik Brodowski unsigned fid:6;
237fe2f639SDominik Brodowski unsigned did:3;
247fe2f639SDominik Brodowski unsigned vid:7;
257fe2f639SDominik Brodowski unsigned res1:6;
267fe2f639SDominik Brodowski unsigned nbdid:1;
277fe2f639SDominik Brodowski unsigned res2:2;
287fe2f639SDominik Brodowski unsigned nbvid:7;
297fe2f639SDominik Brodowski unsigned iddval:8;
307fe2f639SDominik Brodowski unsigned idddiv:2;
317fe2f639SDominik Brodowski unsigned res3:21;
327fe2f639SDominik Brodowski unsigned en:1;
33629d512dSNathan Fontenot } pstate;
34629d512dSNathan Fontenot /* since fam 17h: */
35902bef73SSherry Hurwitz struct {
36902bef73SSherry Hurwitz unsigned fid:8;
37902bef73SSherry Hurwitz unsigned did:6;
38902bef73SSherry Hurwitz unsigned vid:8;
39902bef73SSherry Hurwitz unsigned iddval:8;
40902bef73SSherry Hurwitz unsigned idddiv:2;
418c22e2f6SPrarit Bhargava unsigned res1:31;
42902bef73SSherry Hurwitz unsigned en:1;
43629d512dSNathan Fontenot } pstatedef;
44*2a6da27dSDhananjay Ugwekar /* since fam 1Ah: */
45*2a6da27dSDhananjay Ugwekar struct {
46*2a6da27dSDhananjay Ugwekar unsigned fid:12;
47*2a6da27dSDhananjay Ugwekar unsigned res1:2;
48*2a6da27dSDhananjay Ugwekar unsigned vid:8;
49*2a6da27dSDhananjay Ugwekar unsigned iddval:8;
50*2a6da27dSDhananjay Ugwekar unsigned idddiv:2;
51*2a6da27dSDhananjay Ugwekar unsigned res2:31;
52*2a6da27dSDhananjay Ugwekar unsigned en:1;
53*2a6da27dSDhananjay Ugwekar } pstatedef2;
547fe2f639SDominik Brodowski unsigned long long val;
557fe2f639SDominik Brodowski };
567fe2f639SDominik Brodowski
get_did(union core_pstate pstate)57d1abc4e9SNathan Fontenot static int get_did(union core_pstate pstate)
587fe2f639SDominik Brodowski {
597fe2f639SDominik Brodowski int t;
607fe2f639SDominik Brodowski
61*2a6da27dSDhananjay Ugwekar /* Fam 1Ah onward do not use did */
62*2a6da27dSDhananjay Ugwekar if (cpupower_cpu_info.family >= 0x1A)
63*2a6da27dSDhananjay Ugwekar return 0;
64*2a6da27dSDhananjay Ugwekar
6523765b82SNathan Fontenot if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF)
66629d512dSNathan Fontenot t = pstate.pstatedef.did;
67d1abc4e9SNathan Fontenot else if (cpupower_cpu_info.family == 0x12)
6823765b82SNathan Fontenot t = pstate.val & 0xf;
697fe2f639SDominik Brodowski else
70629d512dSNathan Fontenot t = pstate.pstate.did;
717fe2f639SDominik Brodowski
727fe2f639SDominik Brodowski return t;
737fe2f639SDominik Brodowski }
747fe2f639SDominik Brodowski
get_cof(union core_pstate pstate)75d1abc4e9SNathan Fontenot static int get_cof(union core_pstate pstate)
767fe2f639SDominik Brodowski {
777fe2f639SDominik Brodowski int t;
78*2a6da27dSDhananjay Ugwekar int fid, did, cof = 0;
797fe2f639SDominik Brodowski
80d1abc4e9SNathan Fontenot did = get_did(pstate);
8123765b82SNathan Fontenot if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF) {
82*2a6da27dSDhananjay Ugwekar if (cpupower_cpu_info.family >= 0x1A) {
83*2a6da27dSDhananjay Ugwekar fid = pstate.pstatedef2.fid;
84*2a6da27dSDhananjay Ugwekar if (fid > 0x0f)
85*2a6da27dSDhananjay Ugwekar cof = (fid * 5);
86*2a6da27dSDhananjay Ugwekar } else {
87629d512dSNathan Fontenot fid = pstate.pstatedef.fid;
88902bef73SSherry Hurwitz cof = 200 * fid / did;
89*2a6da27dSDhananjay Ugwekar }
90902bef73SSherry Hurwitz } else {
917fe2f639SDominik Brodowski t = 0x10;
92629d512dSNathan Fontenot fid = pstate.pstate.fid;
93d1abc4e9SNathan Fontenot if (cpupower_cpu_info.family == 0x11)
947fe2f639SDominik Brodowski t = 0x8;
95902bef73SSherry Hurwitz cof = (100 * (fid + t)) >> did;
96902bef73SSherry Hurwitz }
97902bef73SSherry Hurwitz return cof;
987fe2f639SDominik Brodowski }
997fe2f639SDominik Brodowski
1007fe2f639SDominik Brodowski /* Needs:
1017fe2f639SDominik Brodowski * cpu -> the cpu that gets evaluated
102d1abc4e9SNathan Fontenot * boost_states -> how much boost states the machines support
1037fe2f639SDominik Brodowski *
1047fe2f639SDominik Brodowski * Fills up:
1057fe2f639SDominik Brodowski * pstates -> a pointer to an array of size MAX_HW_PSTATES
1067fe2f639SDominik Brodowski * must be initialized with zeros.
1077fe2f639SDominik Brodowski * All available HW pstates (including boost states)
1087fe2f639SDominik Brodowski * no -> amount of pstates above array got filled up with
1097fe2f639SDominik Brodowski *
1107fe2f639SDominik Brodowski * returns zero on success, -1 on failure
1117fe2f639SDominik Brodowski */
decode_pstates(unsigned int cpu,int boost_states,unsigned long * pstates,int * no)112d1abc4e9SNathan Fontenot int decode_pstates(unsigned int cpu, int boost_states,
113d1abc4e9SNathan Fontenot unsigned long *pstates, int *no)
1147fe2f639SDominik Brodowski {
1151421de79SNathan Fontenot int i, psmax;
116629d512dSNathan Fontenot union core_pstate pstate;
1177fe2f639SDominik Brodowski unsigned long long val;
1187fe2f639SDominik Brodowski
119a0255a76SNathan Fontenot /* Only read out frequencies from HW if HW Pstate is supported,
120a0255a76SNathan Fontenot * otherwise frequencies are exported via ACPI tables.
1217fe2f639SDominik Brodowski */
122a0255a76SNathan Fontenot if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_HW_PSTATE))
1237fe2f639SDominik Brodowski return -1;
1247fe2f639SDominik Brodowski
1257fe2f639SDominik Brodowski if (read_msr(cpu, MSR_AMD_PSTATE_LIMIT, &val))
1267fe2f639SDominik Brodowski return -1;
1277fe2f639SDominik Brodowski
1287fe2f639SDominik Brodowski psmax = (val >> 4) & 0x7;
1297fe2f639SDominik Brodowski psmax += boost_states;
1307fe2f639SDominik Brodowski for (i = 0; i <= psmax; i++) {
1317fe2f639SDominik Brodowski if (i >= MAX_HW_PSTATES) {
1327fe2f639SDominik Brodowski fprintf(stderr, "HW pstates [%d] exceeding max [%d]\n",
1337fe2f639SDominik Brodowski psmax, MAX_HW_PSTATES);
1347fe2f639SDominik Brodowski return -1;
1357fe2f639SDominik Brodowski }
1367fe2f639SDominik Brodowski if (read_msr(cpu, MSR_AMD_PSTATE + i, &pstate.val))
1377fe2f639SDominik Brodowski return -1;
13856a85eebSNathan Fontenot
13956a85eebSNathan Fontenot /* The enabled bit (bit 63) is common for all families */
14056a85eebSNathan Fontenot if (!pstate.pstatedef.en)
141f69ffc5dSPrarit Bhargava continue;
142f69ffc5dSPrarit Bhargava
143d1abc4e9SNathan Fontenot pstates[i] = get_cof(pstate);
1447fe2f639SDominik Brodowski }
1457fe2f639SDominik Brodowski *no = i;
1467fe2f639SDominik Brodowski return 0;
1477fe2f639SDominik Brodowski }
1487fe2f639SDominik Brodowski
amd_pci_get_num_boost_states(int * active,int * states)1497fe2f639SDominik Brodowski int amd_pci_get_num_boost_states(int *active, int *states)
1507fe2f639SDominik Brodowski {
1517fe2f639SDominik Brodowski struct pci_access *pci_acc;
1527fe2f639SDominik Brodowski struct pci_dev *device;
1537fe2f639SDominik Brodowski uint8_t val = 0;
1547fe2f639SDominik Brodowski
1557fe2f639SDominik Brodowski *active = *states = 0;
1567fe2f639SDominik Brodowski
157568a8990SThomas Renninger device = pci_slot_func_init(&pci_acc, 0x18, 4);
1587fe2f639SDominik Brodowski
1597fe2f639SDominik Brodowski if (device == NULL)
1607fe2f639SDominik Brodowski return -ENODEV;
1617fe2f639SDominik Brodowski
1627fe2f639SDominik Brodowski val = pci_read_byte(device, 0x15c);
1637fe2f639SDominik Brodowski if (val & 3)
1647fe2f639SDominik Brodowski *active = 1;
1657fe2f639SDominik Brodowski else
1667fe2f639SDominik Brodowski *active = 0;
1677fe2f639SDominik Brodowski *states = (val >> 2) & 7;
1687fe2f639SDominik Brodowski
1697fe2f639SDominik Brodowski pci_cleanup(pci_acc);
1707fe2f639SDominik Brodowski return 0;
1717fe2f639SDominik Brodowski }
17233e43f36SHuang Rui
17333e43f36SHuang Rui /* ACPI P-States Helper Functions for AMD Processors ***************/
17433e43f36SHuang Rui
17533e43f36SHuang Rui /* AMD P-State Helper Functions ************************************/
17633e43f36SHuang Rui enum amd_pstate_value {
17733e43f36SHuang Rui AMD_PSTATE_HIGHEST_PERF,
17833e43f36SHuang Rui AMD_PSTATE_MAX_FREQ,
17933e43f36SHuang Rui AMD_PSTATE_LOWEST_NONLINEAR_FREQ,
18033e43f36SHuang Rui MAX_AMD_PSTATE_VALUE_READ_FILES,
18133e43f36SHuang Rui };
18233e43f36SHuang Rui
18333e43f36SHuang Rui static const char *amd_pstate_value_files[MAX_AMD_PSTATE_VALUE_READ_FILES] = {
18433e43f36SHuang Rui [AMD_PSTATE_HIGHEST_PERF] = "amd_pstate_highest_perf",
18533e43f36SHuang Rui [AMD_PSTATE_MAX_FREQ] = "amd_pstate_max_freq",
18633e43f36SHuang Rui [AMD_PSTATE_LOWEST_NONLINEAR_FREQ] = "amd_pstate_lowest_nonlinear_freq",
18733e43f36SHuang Rui };
18833e43f36SHuang Rui
amd_pstate_get_data(unsigned int cpu,enum amd_pstate_value value)18933e43f36SHuang Rui static unsigned long amd_pstate_get_data(unsigned int cpu,
19033e43f36SHuang Rui enum amd_pstate_value value)
19133e43f36SHuang Rui {
19233e43f36SHuang Rui return cpufreq_get_sysfs_value_from_table(cpu,
19333e43f36SHuang Rui amd_pstate_value_files,
19433e43f36SHuang Rui value,
19533e43f36SHuang Rui MAX_AMD_PSTATE_VALUE_READ_FILES);
19633e43f36SHuang Rui }
19733e43f36SHuang Rui
amd_pstate_boost_init(unsigned int cpu,int * support,int * active)198bf9801baSHuang Rui void amd_pstate_boost_init(unsigned int cpu, int *support, int *active)
199bf9801baSHuang Rui {
200bf9801baSHuang Rui unsigned long highest_perf, nominal_perf, cpuinfo_min,
201bf9801baSHuang Rui cpuinfo_max, amd_pstate_max;
202bf9801baSHuang Rui
203bf9801baSHuang Rui highest_perf = amd_pstate_get_data(cpu, AMD_PSTATE_HIGHEST_PERF);
204bf9801baSHuang Rui nominal_perf = acpi_cppc_get_data(cpu, NOMINAL_PERF);
205bf9801baSHuang Rui
206bf9801baSHuang Rui *support = highest_perf > nominal_perf ? 1 : 0;
207bf9801baSHuang Rui if (!(*support))
208bf9801baSHuang Rui return;
209bf9801baSHuang Rui
210bf9801baSHuang Rui cpufreq_get_hardware_limits(cpu, &cpuinfo_min, &cpuinfo_max);
211bf9801baSHuang Rui amd_pstate_max = amd_pstate_get_data(cpu, AMD_PSTATE_MAX_FREQ);
212bf9801baSHuang Rui
213bf9801baSHuang Rui *active = cpuinfo_max == amd_pstate_max ? 1 : 0;
214bf9801baSHuang Rui }
215bf9801baSHuang Rui
amd_pstate_show_perf_and_freq(unsigned int cpu,int no_rounding)216d8363e29SHuang Rui void amd_pstate_show_perf_and_freq(unsigned int cpu, int no_rounding)
217d8363e29SHuang Rui {
218d8363e29SHuang Rui printf(_(" AMD PSTATE Highest Performance: %lu. Maximum Frequency: "),
219d8363e29SHuang Rui amd_pstate_get_data(cpu, AMD_PSTATE_HIGHEST_PERF));
220d8363e29SHuang Rui /*
221d8363e29SHuang Rui * If boost isn't active, the cpuinfo_max doesn't indicate real max
222d8363e29SHuang Rui * frequency. So we read it back from amd-pstate sysfs entry.
223d8363e29SHuang Rui */
224d8363e29SHuang Rui print_speed(amd_pstate_get_data(cpu, AMD_PSTATE_MAX_FREQ), no_rounding);
225d8363e29SHuang Rui printf(".\n");
226d8363e29SHuang Rui
227d8363e29SHuang Rui printf(_(" AMD PSTATE Nominal Performance: %lu. Nominal Frequency: "),
228d8363e29SHuang Rui acpi_cppc_get_data(cpu, NOMINAL_PERF));
229d8363e29SHuang Rui print_speed(acpi_cppc_get_data(cpu, NOMINAL_FREQ) * 1000,
230d8363e29SHuang Rui no_rounding);
231d8363e29SHuang Rui printf(".\n");
232d8363e29SHuang Rui
233d8363e29SHuang Rui printf(_(" AMD PSTATE Lowest Non-linear Performance: %lu. Lowest Non-linear Frequency: "),
234d8363e29SHuang Rui acpi_cppc_get_data(cpu, LOWEST_NONLINEAR_PERF));
235d8363e29SHuang Rui print_speed(amd_pstate_get_data(cpu, AMD_PSTATE_LOWEST_NONLINEAR_FREQ),
236d8363e29SHuang Rui no_rounding);
237d8363e29SHuang Rui printf(".\n");
238d8363e29SHuang Rui
239d8363e29SHuang Rui printf(_(" AMD PSTATE Lowest Performance: %lu. Lowest Frequency: "),
240d8363e29SHuang Rui acpi_cppc_get_data(cpu, LOWEST_PERF));
241d8363e29SHuang Rui print_speed(acpi_cppc_get_data(cpu, LOWEST_FREQ) * 1000, no_rounding);
242d8363e29SHuang Rui printf(".\n");
243d8363e29SHuang Rui }
244d8363e29SHuang Rui
24533e43f36SHuang Rui /* AMD P-State Helper Functions ************************************/
2467fe2f639SDominik Brodowski #endif /* defined(__i386__) || defined(__x86_64__) */
247