diff options
Diffstat (limited to 'drivers/cpufreq/amd-pstate.h')
| -rw-r--r-- | drivers/cpufreq/amd-pstate.h | 71 |
1 files changed, 39 insertions, 32 deletions
diff --git a/drivers/cpufreq/amd-pstate.h b/drivers/cpufreq/amd-pstate.h index cd573bc6b6db..cb45fdca27a6 100644 --- a/drivers/cpufreq/amd-pstate.h +++ b/drivers/cpufreq/amd-pstate.h @@ -13,6 +13,38 @@ /********************************************************************* * AMD P-state INTERFACE * *********************************************************************/ + +/** + * union perf_cached - A union to cache performance-related data. + * @highest_perf: the maximum performance an individual processor may reach, + * assuming ideal conditions + * For platforms that support the preferred core feature, the highest_perf value maybe + * configured to any value in the range 166-255 by the firmware (because the preferred + * core ranking is encoded in the highest_perf value). To maintain consistency across + * all platforms, we split the highest_perf and preferred core ranking values into + * cpudata->perf.highest_perf and cpudata->prefcore_ranking. + * @nominal_perf: the maximum sustained performance level of the processor, + * assuming ideal operating conditions + * @lowest_nonlinear_perf: the lowest performance level at which nonlinear power + * savings are achieved + * @lowest_perf: the absolute lowest performance level of the processor + * @min_limit_perf: Cached value of the performance corresponding to policy->min + * @max_limit_perf: Cached value of the performance corresponding to policy->max + * @bios_min_perf: Cached perf value corresponding to the "Requested CPU Min Frequency" BIOS option + */ +union perf_cached { + struct { + u8 highest_perf; + u8 nominal_perf; + u8 lowest_nonlinear_perf; + u8 lowest_perf; + u8 min_limit_perf; + u8 max_limit_perf; + u8 bios_min_perf; + }; + u64 val; +}; + /** * struct amd_aperf_mperf * @aperf: actual performance frequency clock count @@ -30,24 +62,11 @@ struct amd_aperf_mperf { * @cpu: CPU number * @req: constraint request to apply * @cppc_req_cached: cached performance request hints - * @highest_perf: the maximum performance an individual processor may reach, - * assuming ideal conditions - * For platforms that do not support the preferred core feature, the - * highest_pef may be configured with 166 or 255, to avoid max frequency - * calculated wrongly. we take the fixed value as the highest_perf. - * @nominal_perf: the maximum sustained performance level of the processor, - * assuming ideal operating conditions - * @lowest_nonlinear_perf: the lowest performance level at which nonlinear power - * savings are achieved - * @lowest_perf: the absolute lowest performance level of the processor + * @perf: cached performance-related data * @prefcore_ranking: the preferred core ranking, the higher value indicates a higher * priority. - * @min_limit_perf: Cached value of the performance corresponding to policy->min - * @max_limit_perf: Cached value of the performance corresponding to policy->max * @min_limit_freq: Cached value of policy->min (in khz) * @max_limit_freq: Cached value of policy->max (in khz) - * @max_freq: the frequency (in khz) that mapped to highest_perf - * @min_freq: the frequency (in khz) that mapped to lowest_perf * @nominal_freq: the frequency (in khz) that mapped to nominal_perf * @lowest_nonlinear_freq: the frequency (in khz) that mapped to lowest_nonlinear_perf * @cur: Difference of Aperf/Mperf/tsc count between last and current sample @@ -57,10 +76,8 @@ struct amd_aperf_mperf { * @hw_prefcore: check whether HW supports preferred core featue. * Only when hw_prefcore and early prefcore param are true, * AMD P-State driver supports preferred core featue. - * @epp_policy: Last saved policy used to set energy-performance preference * @epp_cached: Cached CPPC energy-performance preference value * @policy: Cpufreq policy value - * @cppc_cap1_cached Cached MSR_AMD_CPPC_CAP1 register value * * The amd_cpudata is key private data for each CPU thread in AMD P-State, and * represents all the attributes and goals that AMD P-State requests at runtime. @@ -71,18 +88,11 @@ struct amd_cpudata { struct freq_qos_request req[2]; u64 cppc_req_cached; - u32 highest_perf; - u32 nominal_perf; - u32 lowest_nonlinear_perf; - u32 lowest_perf; - u32 prefcore_ranking; - u32 min_limit_perf; - u32 max_limit_perf; - u32 min_limit_freq; - u32 max_limit_freq; + union perf_cached perf; - u32 max_freq; - u32 min_freq; + u8 prefcore_ranking; + u32 min_limit_freq; + u32 max_limit_freq; u32 nominal_freq; u32 lowest_nonlinear_freq; @@ -94,13 +104,9 @@ struct amd_cpudata { bool hw_prefcore; /* EPP feature related attributes*/ - s16 epp_policy; - s16 epp_cached; u32 policy; - u64 cppc_cap1_cached; bool suspended; - s16 epp_default; - bool boost_state; + u8 epp_default; }; /* @@ -115,6 +121,7 @@ enum amd_pstate_mode { AMD_PSTATE_MAX, }; const char *amd_pstate_get_mode_string(enum amd_pstate_mode mode); +int amd_pstate_get_status(void); int amd_pstate_update_status(const char *buf, size_t size); #endif /* _LINUX_AMD_PSTATE_H */ |