X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fcpufreq%2Fpowernv-cpufreq.c;h=39ac78c94be0f3c191aaf5868cd3c2154ab5fb59;hb=004cb62efd5e9e4772efb46b49c16fa2618ecf3e;hp=50bf12033bbc080c70b5de72de3f89c2dc8bd3a6;hpb=2b2f72d8ce59acce95ceb156f0f31b848e32e6d4;p=karo-tx-linux.git diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c index 50bf12033bbc..39ac78c94be0 100644 --- a/drivers/cpufreq/powernv-cpufreq.c +++ b/drivers/cpufreq/powernv-cpufreq.c @@ -44,7 +44,6 @@ static struct cpufreq_frequency_table powernv_freqs[POWERNV_MAX_PSTATES+1]; static bool rebooting, throttled, occ_reset; -static unsigned int *core_to_chip_map; static const char * const throttle_reason[] = { "No throttling", @@ -55,6 +54,16 @@ static const char * const throttle_reason[] = { "OCC Reset" }; +enum throttle_reason_type { + NO_THROTTLE = 0, + POWERCAP, + CPU_OVERTEMP, + POWER_SUPPLY_FAILURE, + OVERCURRENT, + OCC_RESET_THROTTLE, + OCC_MAX_REASON +}; + static struct chip { unsigned int id; bool throttled; @@ -62,9 +71,13 @@ static struct chip { u8 throttle_reason; cpumask_t mask; struct work_struct throttle; + int throttle_turbo; + int throttle_sub_turbo; + int reason[OCC_MAX_REASON]; } *chips; static int nr_chips; +static DEFINE_PER_CPU(struct chip *, chip_info); /* * Note: The set of pstates consists of contiguous integers, the @@ -196,6 +209,42 @@ static struct freq_attr *powernv_cpu_freq_attr[] = { NULL, }; +#define throttle_attr(name, member) \ +static ssize_t name##_show(struct cpufreq_policy *policy, char *buf) \ +{ \ + struct chip *chip = per_cpu(chip_info, policy->cpu); \ + \ + return sprintf(buf, "%u\n", chip->member); \ +} \ + \ +static struct freq_attr throttle_attr_##name = __ATTR_RO(name) \ + +throttle_attr(unthrottle, reason[NO_THROTTLE]); +throttle_attr(powercap, reason[POWERCAP]); +throttle_attr(overtemp, reason[CPU_OVERTEMP]); +throttle_attr(supply_fault, reason[POWER_SUPPLY_FAILURE]); +throttle_attr(overcurrent, reason[OVERCURRENT]); +throttle_attr(occ_reset, reason[OCC_RESET_THROTTLE]); +throttle_attr(turbo_stat, throttle_turbo); +throttle_attr(sub_turbo_stat, throttle_sub_turbo); + +static struct attribute *throttle_attrs[] = { + &throttle_attr_unthrottle.attr, + &throttle_attr_powercap.attr, + &throttle_attr_overtemp.attr, + &throttle_attr_supply_fault.attr, + &throttle_attr_overcurrent.attr, + &throttle_attr_occ_reset.attr, + &throttle_attr_turbo_stat.attr, + &throttle_attr_sub_turbo_stat.attr, + NULL, +}; + +static const struct attribute_group throttle_attr_grp = { + .name = "throttle_stats", + .attrs = throttle_attrs, +}; + /* Helper routines */ /* Access helpers to power mgt SPR */ @@ -324,34 +373,35 @@ static inline unsigned int get_nominal_index(void) static void powernv_cpufreq_throttle_check(void *data) { + struct chip *chip; unsigned int cpu = smp_processor_id(); - unsigned int chip_id = core_to_chip_map[cpu_core_index_of_thread(cpu)]; unsigned long pmsr; - int pmsr_pmax, i; + int pmsr_pmax; pmsr = get_pmspr(SPRN_PMSR); - - for (i = 0; i < nr_chips; i++) - if (chips[i].id == chip_id) - break; + chip = this_cpu_read(chip_info); /* Check for Pmax Capping */ pmsr_pmax = (s8)PMSR_MAX(pmsr); if (pmsr_pmax != powernv_pstate_info.max) { - if (chips[i].throttled) + if (chip->throttled) goto next; - chips[i].throttled = true; - if (pmsr_pmax < powernv_pstate_info.nominal) + chip->throttled = true; + if (pmsr_pmax < powernv_pstate_info.nominal) { pr_warn_once("CPU %d on Chip %u has Pmax reduced below nominal frequency (%d < %d)\n", - cpu, chips[i].id, pmsr_pmax, + cpu, chip->id, pmsr_pmax, powernv_pstate_info.nominal); - trace_powernv_throttle(chips[i].id, - throttle_reason[chips[i].throttle_reason], + chip->throttle_sub_turbo++; + } else { + chip->throttle_turbo++; + } + trace_powernv_throttle(chip->id, + throttle_reason[chip->throttle_reason], pmsr_pmax); - } else if (chips[i].throttled) { - chips[i].throttled = false; - trace_powernv_throttle(chips[i].id, - throttle_reason[chips[i].throttle_reason], + } else if (chip->throttled) { + chip->throttled = false; + trace_powernv_throttle(chip->id, + throttle_reason[chip->throttle_reason], pmsr_pmax); } @@ -411,6 +461,21 @@ static int powernv_cpufreq_cpu_init(struct cpufreq_policy *policy) for (i = 0; i < threads_per_core; i++) cpumask_set_cpu(base + i, policy->cpus); + if (!policy->driver_data) { + int ret; + + ret = sysfs_create_group(&policy->kobj, &throttle_attr_grp); + if (ret) { + pr_info("Failed to create throttle stats directory for cpu %d\n", + policy->cpu); + return ret; + } + /* + * policy->driver_data is used as a flag for one-time + * creation of throttle sysfs files. + */ + policy->driver_data = policy; + } return cpufreq_table_validate_and_show(policy, powernv_freqs); } @@ -517,8 +582,10 @@ static int powernv_cpufreq_occ_msg(struct notifier_block *nb, break; if (omsg.throttle_status >= 0 && - omsg.throttle_status <= OCC_MAX_THROTTLE_STATUS) + omsg.throttle_status <= OCC_MAX_THROTTLE_STATUS) { chips[i].throttle_reason = omsg.throttle_status; + chips[i].reason[omsg.throttle_status]++; + } if (!omsg.throttle_status) chips[i].restore = true; @@ -558,47 +625,34 @@ static int init_chip_info(void) unsigned int chip[256]; unsigned int cpu, i; unsigned int prev_chip_id = UINT_MAX; - cpumask_t cpu_mask; - int ret = -ENOMEM; - - core_to_chip_map = kcalloc(cpu_nr_cores(), sizeof(unsigned int), - GFP_KERNEL); - if (!core_to_chip_map) - goto out; - cpumask_copy(&cpu_mask, cpu_possible_mask); - for_each_cpu(cpu, &cpu_mask) { + for_each_possible_cpu(cpu) { unsigned int id = cpu_to_chip_id(cpu); if (prev_chip_id != id) { prev_chip_id = id; chip[nr_chips++] = id; } - core_to_chip_map[cpu_core_index_of_thread(cpu)] = id; - cpumask_andnot(&cpu_mask, &cpu_mask, cpu_sibling_mask(cpu)); } chips = kcalloc(nr_chips, sizeof(struct chip), GFP_KERNEL); if (!chips) - goto free_chip_map; + return -ENOMEM; for (i = 0; i < nr_chips; i++) { chips[i].id = chip[i]; cpumask_copy(&chips[i].mask, cpumask_of_node(chip[i])); INIT_WORK(&chips[i].throttle, powernv_cpufreq_work_fn); + for_each_cpu(cpu, &chips[i].mask) + per_cpu(chip_info, cpu) = &chips[i]; } return 0; -free_chip_map: - kfree(core_to_chip_map); -out: - return ret; } static inline void clean_chip_info(void) { kfree(chips); - kfree(core_to_chip_map); } static inline void unregister_all_notifiers(void)