diff options
Diffstat (limited to 'drivers/cpufreq/cppc_cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/cppc_cpufreq.c | 170 |
1 files changed, 125 insertions, 45 deletions
diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index cb93f00bafdb..4a17162a392d 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -26,14 +26,6 @@ #include <acpi/cppc_acpi.h> -/* - * This list contains information parsed from per CPU ACPI _CPC and _PSD - * structures: e.g. the highest and lowest supported performance, capabilities, - * desired performance, level requested etc. Depending on the share_type, not - * all CPUs will have an entry in the list. - */ -static LIST_HEAD(cpu_data_list); - static struct cpufreq_driver cppc_cpufreq_driver; #ifdef CONFIG_ACPI_CPPC_CPUFREQ_FIE @@ -352,7 +344,6 @@ static unsigned int cppc_cpufreq_get_transition_delay_us(unsigned int cpu) #if defined(CONFIG_ARM64) && defined(CONFIG_ENERGY_MODEL) static DEFINE_PER_CPU(unsigned int, efficiency_class); -static void cppc_cpufreq_register_em(struct cpufreq_policy *policy); /* Create an artificial performance state every CPPC_EM_CAP_STEP capacity unit. */ #define CPPC_EM_CAP_STEP (20) @@ -488,7 +479,19 @@ static int cppc_get_cpu_cost(struct device *cpu_dev, unsigned long KHz, return 0; } -static int populate_efficiency_class(void) +static void cppc_cpufreq_register_em(struct cpufreq_policy *policy) +{ + struct cppc_cpudata *cpu_data; + struct em_data_callback em_cb = + EM_ADV_DATA_CB(cppc_get_cpu_power, cppc_get_cpu_cost); + + cpu_data = policy->driver_data; + em_dev_register_perf_domain(get_cpu_device(policy->cpu), + get_perf_level_count(policy), &em_cb, + cpu_data->shared_cpu_map, 0); +} + +static void populate_efficiency_class(void) { struct acpi_madt_generic_interrupt *gicc; DECLARE_BITMAP(used_classes, 256) = {}; @@ -503,7 +506,7 @@ static int populate_efficiency_class(void) if (bitmap_weight(used_classes, 256) <= 1) { pr_debug("Efficiency classes are all equal (=%d). " "No EM registered", class); - return -EINVAL; + return; } /* @@ -520,26 +523,11 @@ static int populate_efficiency_class(void) index++; } cppc_cpufreq_driver.register_em = cppc_cpufreq_register_em; - - return 0; -} - -static void cppc_cpufreq_register_em(struct cpufreq_policy *policy) -{ - struct cppc_cpudata *cpu_data; - struct em_data_callback em_cb = - EM_ADV_DATA_CB(cppc_get_cpu_power, cppc_get_cpu_cost); - - cpu_data = policy->driver_data; - em_dev_register_perf_domain(get_cpu_device(policy->cpu), - get_perf_level_count(policy), &em_cb, - cpu_data->shared_cpu_map, 0); } #else -static int populate_efficiency_class(void) +static void populate_efficiency_class(void) { - return 0; } #endif @@ -567,8 +555,6 @@ static struct cppc_cpudata *cppc_cpufreq_get_cpu_data(unsigned int cpu) goto free_mask; } - list_add(&cpu_data->node, &cpu_data_list); - return cpu_data; free_mask: @@ -583,7 +569,6 @@ static void cppc_cpufreq_put_cpu_data(struct cpufreq_policy *policy) { struct cppc_cpudata *cpu_data = policy->driver_data; - list_del(&cpu_data->node); free_cpumask_var(cpu_data->shared_cpu_map); kfree(cpu_data); policy->driver_data = NULL; @@ -808,15 +793,124 @@ static ssize_t show_freqdomain_cpus(struct cpufreq_policy *policy, char *buf) return cpufreq_show_cpus(cpu_data->shared_cpu_map, buf); } + +static ssize_t show_auto_select(struct cpufreq_policy *policy, char *buf) +{ + bool val; + int ret; + + ret = cppc_get_auto_sel(policy->cpu, &val); + + /* show "<unsupported>" when this register is not supported by cpc */ + if (ret == -EOPNOTSUPP) + return sysfs_emit(buf, "<unsupported>\n"); + + if (ret) + return ret; + + return sysfs_emit(buf, "%d\n", val); +} + +static ssize_t store_auto_select(struct cpufreq_policy *policy, + const char *buf, size_t count) +{ + bool val; + int ret; + + ret = kstrtobool(buf, &val); + if (ret) + return ret; + + ret = cppc_set_auto_sel(policy->cpu, val); + if (ret) + return ret; + + return count; +} + +static ssize_t show_auto_act_window(struct cpufreq_policy *policy, char *buf) +{ + u64 val; + int ret; + + ret = cppc_get_auto_act_window(policy->cpu, &val); + + /* show "<unsupported>" when this register is not supported by cpc */ + if (ret == -EOPNOTSUPP) + return sysfs_emit(buf, "<unsupported>\n"); + + if (ret) + return ret; + + return sysfs_emit(buf, "%llu\n", val); +} + +static ssize_t store_auto_act_window(struct cpufreq_policy *policy, + const char *buf, size_t count) +{ + u64 usec; + int ret; + + ret = kstrtou64(buf, 0, &usec); + if (ret) + return ret; + + ret = cppc_set_auto_act_window(policy->cpu, usec); + if (ret) + return ret; + + return count; +} + +static ssize_t show_energy_performance_preference_val(struct cpufreq_policy *policy, char *buf) +{ + u64 val; + int ret; + + ret = cppc_get_epp_perf(policy->cpu, &val); + + /* show "<unsupported>" when this register is not supported by cpc */ + if (ret == -EOPNOTSUPP) + return sysfs_emit(buf, "<unsupported>\n"); + + if (ret) + return ret; + + return sysfs_emit(buf, "%llu\n", val); +} + +static ssize_t store_energy_performance_preference_val(struct cpufreq_policy *policy, + const char *buf, size_t count) +{ + u64 val; + int ret; + + ret = kstrtou64(buf, 0, &val); + if (ret) + return ret; + + ret = cppc_set_epp(policy->cpu, val); + if (ret) + return ret; + + return count; +} + cpufreq_freq_attr_ro(freqdomain_cpus); +cpufreq_freq_attr_rw(auto_select); +cpufreq_freq_attr_rw(auto_act_window); +cpufreq_freq_attr_rw(energy_performance_preference_val); static struct freq_attr *cppc_cpufreq_attr[] = { &freqdomain_cpus, + &auto_select, + &auto_act_window, + &energy_performance_preference_val, NULL, }; static struct cpufreq_driver cppc_cpufreq_driver = { - .flags = CPUFREQ_CONST_LOOPS, + .flags = CPUFREQ_CONST_LOOPS | CPUFREQ_NEED_UPDATE_LIMITS, .verify = cppc_verify_policy, .target = cppc_cpufreq_set_target, .get = cppc_cpufreq_get_rate, @@ -845,24 +939,10 @@ static int __init cppc_cpufreq_init(void) return ret; } -static inline void free_cpu_data(void) -{ - struct cppc_cpudata *iter, *tmp; - - list_for_each_entry_safe(iter, tmp, &cpu_data_list, node) { - free_cpumask_var(iter->shared_cpu_map); - list_del(&iter->node); - kfree(iter); - } - -} - static void __exit cppc_cpufreq_exit(void) { cpufreq_unregister_driver(&cppc_cpufreq_driver); cppc_freq_invariance_exit(); - - free_cpu_data(); } module_exit(cppc_cpufreq_exit); |