diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/cppc_acpi.c | 141 | ||||
| -rw-r--r-- | drivers/cpufreq/cppc_cpufreq.c | 174 |
2 files changed, 151 insertions, 164 deletions
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 9e335f0d2595..8c1d62e88c46 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -413,109 +413,88 @@ end: return result; } +bool acpi_cpc_valid(void) +{ + struct cpc_desc *cpc_ptr; + int cpu; + + for_each_possible_cpu(cpu) { + cpc_ptr = per_cpu(cpc_desc_ptr, cpu); + if (!cpc_ptr) + return false; + } + + return true; +} +EXPORT_SYMBOL_GPL(acpi_cpc_valid); + /** - * acpi_get_psd_map - Map the CPUs in a common freq domain. - * @all_cpu_data: Ptrs to CPU specific CPPC data including PSD info. + * acpi_get_psd_map - Map the CPUs in the freq domain of a given cpu + * @cpu: Find all CPUs that share a domain with cpu. + * @cpu_data: Pointer to CPU specific CPPC data including PSD info. * * Return: 0 for success or negative value for err. */ -int acpi_get_psd_map(struct cppc_cpudata **all_cpu_data) +int acpi_get_psd_map(unsigned int cpu, struct cppc_cpudata *cpu_data) { - int count_target; - int retval = 0; - unsigned int i, j; - cpumask_var_t covered_cpus; - struct cppc_cpudata *pr, *match_pr; - struct acpi_psd_package *pdomain; - struct acpi_psd_package *match_pdomain; struct cpc_desc *cpc_ptr, *match_cpc_ptr; - - if (!zalloc_cpumask_var(&covered_cpus, GFP_KERNEL)) - return -ENOMEM; + struct acpi_psd_package *match_pdomain; + struct acpi_psd_package *pdomain; + int count_target, i; /* * Now that we have _PSD data from all CPUs, let's setup P-state * domain info. */ - for_each_possible_cpu(i) { - if (cpumask_test_cpu(i, covered_cpus)) - continue; - - pr = all_cpu_data[i]; - cpc_ptr = per_cpu(cpc_desc_ptr, i); - if (!cpc_ptr) { - retval = -EFAULT; - goto err_ret; - } + cpc_ptr = per_cpu(cpc_desc_ptr, cpu); + if (!cpc_ptr) + return -EFAULT; - pdomain = &(cpc_ptr->domain_info); - cpumask_set_cpu(i, pr->shared_cpu_map); - cpumask_set_cpu(i, covered_cpus); - if (pdomain->num_processors <= 1) - continue; + pdomain = &(cpc_ptr->domain_info); + cpumask_set_cpu(cpu, cpu_data->shared_cpu_map); + if (pdomain->num_processors <= 1) + return 0; - /* Validate the Domain info */ - count_target = pdomain->num_processors; - if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL) - pr->shared_type = CPUFREQ_SHARED_TYPE_ALL; - else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL) - pr->shared_type = CPUFREQ_SHARED_TYPE_HW; - else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY) - pr->shared_type = CPUFREQ_SHARED_TYPE_ANY; - - for_each_possible_cpu(j) { - if (i == j) - continue; - - match_cpc_ptr = per_cpu(cpc_desc_ptr, j); - if (!match_cpc_ptr) { - retval = -EFAULT; - goto err_ret; - } + /* Validate the Domain info */ + count_target = pdomain->num_processors; + if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL) + cpu_data->shared_type = CPUFREQ_SHARED_TYPE_ALL; + else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL) + cpu_data->shared_type = CPUFREQ_SHARED_TYPE_HW; + else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY) + cpu_data->shared_type = CPUFREQ_SHARED_TYPE_ANY; - match_pdomain = &(match_cpc_ptr->domain_info); - if (match_pdomain->domain != pdomain->domain) - continue; + for_each_possible_cpu(i) { + if (i == cpu) + continue; - /* Here i and j are in the same domain */ - if (match_pdomain->num_processors != count_target) { - retval = -EFAULT; - goto err_ret; - } + match_cpc_ptr = per_cpu(cpc_desc_ptr, i); + if (!match_cpc_ptr) + goto err_fault; - if (pdomain->coord_type != match_pdomain->coord_type) { - retval = -EFAULT; - goto err_ret; - } + match_pdomain = &(match_cpc_ptr->domain_info); + if (match_pdomain->domain != pdomain->domain) + continue; - cpumask_set_cpu(j, covered_cpus); - cpumask_set_cpu(j, pr->shared_cpu_map); - } + /* Here i and cpu are in the same domain */ + if (match_pdomain->num_processors != count_target) + goto err_fault; - for_each_cpu(j, pr->shared_cpu_map) { - if (i == j) - continue; + if (pdomain->coord_type != match_pdomain->coord_type) + goto err_fault; - match_pr = all_cpu_data[j]; - match_pr->shared_type = pr->shared_type; - cpumask_copy(match_pr->shared_cpu_map, - pr->shared_cpu_map); - } + cpumask_set_cpu(i, cpu_data->shared_cpu_map); } - goto out; -err_ret: - for_each_possible_cpu(i) { - pr = all_cpu_data[i]; + return 0; - /* Assume no coordination on any error parsing domain info */ - cpumask_clear(pr->shared_cpu_map); - cpumask_set_cpu(i, pr->shared_cpu_map); - pr->shared_type = CPUFREQ_SHARED_TYPE_NONE; - } -out: - free_cpumask_var(covered_cpus); - return retval; +err_fault: + /* Assume no coordination on any error parsing domain info */ + cpumask_clear(cpu_data->shared_cpu_map); + cpumask_set_cpu(cpu, cpu_data->shared_cpu_map); + cpu_data->shared_type = CPUFREQ_SHARED_TYPE_NONE; + + return -EFAULT; } EXPORT_SYMBOL_GPL(acpi_get_psd_map); diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 40b58d2dbbc6..8a482c434ea6 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -30,13 +30,13 @@ #define DMI_PROCESSOR_MAX_SPEED 0x14 /* - * These structs contain information parsed from per CPU - * ACPI _CPC structures. - * e.g. For each CPU the highest, lowest supported - * performance capabilities, desired performance level - * requested etc. + * 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 struct cppc_cpudata **all_cpu_data; +static LIST_HEAD(cpu_data_list); + static bool boost_supported; struct cppc_workaround_oem_info { @@ -148,8 +148,9 @@ static unsigned int cppc_cpufreq_khz_to_perf(struct cppc_cpudata *cpu_data, static int cppc_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int target_freq, unsigned int relation) + { - struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu]; + struct cppc_cpudata *cpu_data = policy->driver_data; unsigned int cpu = policy->cpu; struct cpufreq_freqs freqs; u32 desired_perf; @@ -183,7 +184,7 @@ static int cppc_verify_policy(struct cpufreq_policy_data *policy) static void cppc_cpufreq_stop_cpu(struct cpufreq_policy *policy) { - struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu]; + struct cppc_cpudata *cpu_data = policy->driver_data; struct cppc_perf_caps *caps = &cpu_data->perf_caps; unsigned int cpu = policy->cpu; int ret; @@ -194,6 +195,12 @@ static void cppc_cpufreq_stop_cpu(struct cpufreq_policy *policy) if (ret) pr_debug("Err setting perf value:%d on CPU:%d. ret:%d\n", caps->lowest_perf, cpu, ret); + + /* Remove CPU node from list and free driver data for policy */ + free_cpumask_var(cpu_data->shared_cpu_map); + list_del(&cpu_data->node); + kfree(policy->driver_data); + policy->driver_data = NULL; } /* @@ -239,25 +246,61 @@ static unsigned int cppc_cpufreq_get_transition_delay_us(unsigned int cpu) } #endif -static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) + +static struct cppc_cpudata *cppc_cpufreq_get_cpu_data(unsigned int cpu) { - struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu]; - struct cppc_perf_caps *caps = &cpu_data->perf_caps; - unsigned int cpu = policy->cpu; - int i, ret = 0; + struct cppc_cpudata *cpu_data; + int ret; + + cpu_data = kzalloc(sizeof(struct cppc_cpudata), GFP_KERNEL); + if (!cpu_data) + goto out; - cpu_data->cpu = cpu; - ret = cppc_get_perf_caps(cpu, caps); + if (!zalloc_cpumask_var(&cpu_data->shared_cpu_map, GFP_KERNEL)) + goto free_cpu; + ret = acpi_get_psd_map(cpu, cpu_data); if (ret) { - pr_debug("Err reading CPU%d perf capabilities. ret:%d\n", - cpu, ret); - return ret; + pr_debug("Err parsing CPU%d PSD data: ret:%d\n", cpu, ret); + goto free_mask; + } + + ret = cppc_get_perf_caps(cpu, &cpu_data->perf_caps); + if (ret) { + pr_debug("Err reading CPU%d perf caps: ret:%d\n", cpu, ret); + goto free_mask; } /* Convert the lowest and nominal freq from MHz to KHz */ - caps->lowest_freq *= 1000; - caps->nominal_freq *= 1000; + cpu_data->perf_caps.lowest_freq *= 1000; + cpu_data->perf_caps.nominal_freq *= 1000; + + list_add(&cpu_data->node, &cpu_data_list); + + return cpu_data; + +free_mask: + free_cpumask_var(cpu_data->shared_cpu_map); +free_cpu: + kfree(cpu_data); +out: + return NULL; +} + +static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) +{ + unsigned int cpu = policy->cpu; + struct cppc_cpudata *cpu_data; + struct cppc_perf_caps *caps; + int ret; + + cpu_data = cppc_cpufreq_get_cpu_data(cpu); + if (!cpu_data) { + pr_err("Error in acquiring _CPC/_PSD data for CPU%d.\n", cpu); + return -ENODEV; + } + caps = &cpu_data->perf_caps; + policy->driver_data = cpu_data; /* * Set min to lowest nonlinear perf to avoid any efficiency penalty (see @@ -287,16 +330,12 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) /* Nothing to be done - we'll have a policy for each CPU */ break; case CPUFREQ_SHARED_TYPE_ANY: - /* All CPUs in the domain will share a policy */ + /* + * All CPUs in the domain will share a policy and all cpufreq + * operations will use a single cppc_cpudata structure stored + * in policy->driver_data. + */ cpumask_copy(policy->cpus, cpu_data->shared_cpu_map); - - for_each_cpu(i, policy->cpus) { - if (unlikely(i == cpu)) - continue; - - memcpy(&all_cpu_data[i]->perf_caps, caps, - sizeof(cpu_data->perf_caps)); - } break; default: pr_debug("Unsupported CPU co-ord type: %d\n", @@ -304,8 +343,6 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) return -EFAULT; } - cpu_data->cur_policy = policy; - /* * If 'highest_perf' is greater than 'nominal_perf', we assume CPU Boost * is supported. @@ -360,9 +397,12 @@ static int cppc_get_rate_from_fbctrs(struct cppc_cpudata *cpu_data, static unsigned int cppc_cpufreq_get_rate(unsigned int cpu) { struct cppc_perf_fb_ctrs fb_ctrs_t0 = {0}, fb_ctrs_t1 = {0}; - struct cppc_cpudata *cpu_data = all_cpu_data[cpu]; + struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); + struct cppc_cpudata *cpu_data = policy->driver_data; int ret; + cpufreq_cpu_put(policy); + ret = cppc_get_perf_ctrs(cpu, &fb_ctrs_t0); if (ret) return ret; @@ -378,7 +418,7 @@ static unsigned int cppc_cpufreq_get_rate(unsigned int cpu) static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state) { - struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu]; + struct cppc_cpudata *cpu_data = policy->driver_data; struct cppc_perf_caps *caps = &cpu_data->perf_caps; int ret; @@ -404,9 +444,9 @@ static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state) static ssize_t show_freqdomain_cpus(struct cpufreq_policy *policy, char *buf) { - unsigned int cpu = policy->cpu; + struct cppc_cpudata *cpu_data = policy->driver_data; - return cpufreq_show_cpus(all_cpu_data[cpu]->shared_cpu_map, buf); + return cpufreq_show_cpus(cpu_data->shared_cpu_map, buf); } cpufreq_freq_attr_ro(freqdomain_cpus); @@ -435,10 +475,13 @@ static struct cpufreq_driver cppc_cpufreq_driver = { */ static unsigned int hisi_cppc_cpufreq_get_rate(unsigned int cpu) { - struct cppc_cpudata *cpu_data = all_cpu_data[cpu]; + struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); + struct cppc_cpudata *cpu_data = policy->driver_data; u64 desired_perf; int ret; + cpufreq_cpu_put(policy); + ret = cppc_get_desired_perf(cpu, &desired_perf); if (ret < 0) return -EIO; @@ -471,68 +514,33 @@ static void cppc_check_hisi_workaround(void) static int __init cppc_cpufreq_init(void) { - struct cppc_cpudata *cpu_data; - int i, ret = 0; - - if (acpi_disabled) + if ((acpi_disabled) || !acpi_cpc_valid()) return -ENODEV; - all_cpu_data = kcalloc(num_possible_cpus(), sizeof(void *), - GFP_KERNEL); - if (!all_cpu_data) - return -ENOMEM; - - for_each_possible_cpu(i) { - all_cpu_data[i] = kzalloc(sizeof(struct cppc_cpudata), GFP_KERNEL); - if (!all_cpu_data[i]) - goto out; - - cpu_data = all_cpu_data[i]; - if (!zalloc_cpumask_var(&cpu_data->shared_cpu_map, GFP_KERNEL)) - goto out; - } - - ret = acpi_get_psd_map(all_cpu_data); - if (ret) { - pr_debug("Error parsing PSD data. Aborting cpufreq registration.\n"); - goto out; - } + INIT_LIST_HEAD(&cpu_data_list); cppc_check_hisi_workaround(); - ret = cpufreq_register_driver(&cppc_cpufreq_driver); - if (ret) - goto out; + return cpufreq_register_driver(&cppc_cpufreq_driver); +} - return ret; +static inline void free_cpu_data(void) +{ + struct cppc_cpudata *iter, *tmp; -out: - for_each_possible_cpu(i) { - cpu_data = all_cpu_data[i]; - if (!cpu_data) - break; - free_cpumask_var(cpu_data->shared_cpu_map); - kfree(cpu_data); + list_for_each_entry_safe(iter, tmp, &cpu_data_list, node) { + free_cpumask_var(iter->shared_cpu_map); + list_del(&iter->node); + kfree(iter); } - kfree(all_cpu_data); - return -ENODEV; } static void __exit cppc_cpufreq_exit(void) { - struct cppc_cpudata *cpu_data; - int i; - cpufreq_unregister_driver(&cppc_cpufreq_driver); - for_each_possible_cpu(i) { - cpu_data = all_cpu_data[i]; - free_cpumask_var(cpu_data->shared_cpu_map); - kfree(cpu_data); - } - - kfree(all_cpu_data); + free_cpu_data(); } module_exit(cppc_cpufreq_exit); |