diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/cpufreq.h | 234 |
1 files changed, 231 insertions, 3 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index c378776628b4..c6410b1b2490 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -36,6 +36,12 @@ struct cpufreq_governor; +enum cpufreq_table_sorting { + CPUFREQ_TABLE_UNSORTED, + CPUFREQ_TABLE_SORTED_ASCENDING, + CPUFREQ_TABLE_SORTED_DESCENDING +}; + struct cpufreq_freqs { unsigned int cpu; /* cpu nr */ unsigned int old; @@ -87,6 +93,7 @@ struct cpufreq_policy { struct cpufreq_user_policy user_policy; struct cpufreq_frequency_table *freq_table; + enum cpufreq_table_sorting freq_table_sorted; struct list_head policy_list; struct kobject kobj; @@ -597,9 +604,9 @@ int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, struct cpufreq_frequency_table *table); int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy); -int cpufreq_frequency_table_target(struct cpufreq_policy *policy, - unsigned int target_freq, - unsigned int relation); +int cpufreq_table_index_unsorted(struct cpufreq_policy *policy, + unsigned int target_freq, + unsigned int relation); int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, unsigned int freq); @@ -610,6 +617,227 @@ int cpufreq_boost_trigger_state(int state); int cpufreq_boost_enabled(void); int cpufreq_enable_boost_support(void); bool policy_has_boost_freq(struct cpufreq_policy *policy); + +/* Find lowest freq at or above target in a table in ascending order */ +static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy, + unsigned int target_freq) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + unsigned int freq; + int i, best = -1; + + for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { + freq = table[i].frequency; + + if (freq >= target_freq) + return i; + + best = i; + } + + return best; +} + +/* Find lowest freq at or above target in a table in descending order */ +static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy, + unsigned int target_freq) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + unsigned int freq; + int i, best = -1; + + for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { + freq = table[i].frequency; + + if (freq == target_freq) + return i; + + if (freq > target_freq) { + best = i; + continue; + } + + /* No freq found above target_freq */ + if (best == -1) + return i; + + return best; + } + + return best; +} + +/* Works only on sorted freq-tables */ +static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy, + unsigned int target_freq) +{ + target_freq = clamp_val(target_freq, policy->min, policy->max); + + if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) + return cpufreq_table_find_index_al(policy, target_freq); + else + return cpufreq_table_find_index_dl(policy, target_freq); +} + +/* Find highest freq at or below target in a table in ascending order */ +static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy, + unsigned int target_freq) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + unsigned int freq; + int i, best = -1; + + for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { + freq = table[i].frequency; + + if (freq == target_freq) + return i; + + if (freq < target_freq) { + best = i; + continue; + } + + /* No freq found below target_freq */ + if (best == -1) + return i; + + return best; + } + + return best; +} + +/* Find highest freq at or below target in a table in descending order */ +static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy, + unsigned int target_freq) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + unsigned int freq; + int i, best = -1; + + for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { + freq = table[i].frequency; + + if (freq <= target_freq) + return i; + + best = i; + } + + return best; +} + +/* Works only on sorted freq-tables */ +static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy, + unsigned int target_freq) +{ + target_freq = clamp_val(target_freq, policy->min, policy->max); + + if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) + return cpufreq_table_find_index_ah(policy, target_freq); + else + return cpufreq_table_find_index_dh(policy, target_freq); +} + +/* Find closest freq to target in a table in ascending order */ +static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy, + unsigned int target_freq) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + unsigned int freq; + int i, best = -1; + + for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { + freq = table[i].frequency; + + if (freq == target_freq) + return i; + + if (freq < target_freq) { + best = i; + continue; + } + + /* No freq found below target_freq */ + if (best == -1) + return i; + + /* Choose the closest freq */ + if (target_freq - table[best].frequency > freq - target_freq) + return i; + + return best; + } + + return best; +} + +/* Find closest freq to target in a table in descending order */ +static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy, + unsigned int target_freq) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + unsigned int freq; + int i, best = -1; + + for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { + freq = table[i].frequency; + + if (freq == target_freq) + return i; + + if (freq > target_freq) { + best = i; + continue; + } + + /* No freq found above target_freq */ + if (best == -1) + return i; + + /* Choose the closest freq */ + if (table[best].frequency - target_freq > target_freq - freq) + return i; + + return best; + } + + return best; +} + +/* Works only on sorted freq-tables */ +static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy, + unsigned int target_freq) +{ + target_freq = clamp_val(target_freq, policy->min, policy->max); + + if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) + return cpufreq_table_find_index_ac(policy, target_freq); + else + return cpufreq_table_find_index_dc(policy, target_freq); +} + +static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy, + unsigned int target_freq, + unsigned int relation) +{ + if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED)) + return cpufreq_table_index_unsorted(policy, target_freq, + relation); + + switch (relation) { + case CPUFREQ_RELATION_L: + return cpufreq_table_find_index_l(policy, target_freq); + case CPUFREQ_RELATION_H: + return cpufreq_table_find_index_h(policy, target_freq); + case CPUFREQ_RELATION_C: + return cpufreq_table_find_index_c(policy, target_freq); + default: + pr_err("%s: Invalid relation: %d\n", __func__, relation); + return -EINVAL; + } +} #else static inline int cpufreq_boost_trigger_state(int state) { |