summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/arch/x86/kernel/cpu/mcheck/therm_throt.c
diff options
context:
space:
mode:
authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/x86/kernel/cpu/mcheck/therm_throt.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
downloadFOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz
FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2
FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/cpu/mcheck/therm_throt.c')
-rw-r--r--ANDROID_3.4.5/arch/x86/kernel/cpu/mcheck/therm_throt.c508
1 files changed, 0 insertions, 508 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/cpu/mcheck/therm_throt.c b/ANDROID_3.4.5/arch/x86/kernel/cpu/mcheck/therm_throt.c
deleted file mode 100644
index 47a18702..00000000
--- a/ANDROID_3.4.5/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ /dev/null
@@ -1,508 +0,0 @@
-/*
- * Thermal throttle event support code (such as syslog messaging and rate
- * limiting) that was factored out from x86_64 (mce_intel.c) and i386 (p4.c).
- *
- * This allows consistent reporting of CPU thermal throttle events.
- *
- * Maintains a counter in /sys that keeps track of the number of thermal
- * events, such that the user knows how bad the thermal problem might be
- * (since the logging to syslog and mcelog is rate limited).
- *
- * Author: Dmitriy Zavin (dmitriyz@google.com)
- *
- * Credits: Adapted from Zwane Mwaikambo's original code in mce_intel.c.
- * Inspired by Ross Biro's and Al Borchers' counter code.
- */
-#include <linux/interrupt.h>
-#include <linux/notifier.h>
-#include <linux/jiffies.h>
-#include <linux/kernel.h>
-#include <linux/percpu.h>
-#include <linux/export.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/cpu.h>
-
-#include <asm/processor.h>
-#include <asm/apic.h>
-#include <asm/idle.h>
-#include <asm/mce.h>
-#include <asm/msr.h>
-
-/* How long to wait between reporting thermal events */
-#define CHECK_INTERVAL (300 * HZ)
-
-#define THERMAL_THROTTLING_EVENT 0
-#define POWER_LIMIT_EVENT 1
-
-/*
- * Current thermal event state:
- */
-struct _thermal_state {
- bool new_event;
- int event;
- u64 next_check;
- unsigned long count;
- unsigned long last_count;
-};
-
-struct thermal_state {
- struct _thermal_state core_throttle;
- struct _thermal_state core_power_limit;
- struct _thermal_state package_throttle;
- struct _thermal_state package_power_limit;
- struct _thermal_state core_thresh0;
- struct _thermal_state core_thresh1;
-};
-
-/* Callback to handle core threshold interrupts */
-int (*platform_thermal_notify)(__u64 msr_val);
-EXPORT_SYMBOL(platform_thermal_notify);
-
-static DEFINE_PER_CPU(struct thermal_state, thermal_state);
-
-static atomic_t therm_throt_en = ATOMIC_INIT(0);
-
-static u32 lvtthmr_init __read_mostly;
-
-#ifdef CONFIG_SYSFS
-#define define_therm_throt_device_one_ro(_name) \
- static DEVICE_ATTR(_name, 0444, \
- therm_throt_device_show_##_name, \
- NULL) \
-
-#define define_therm_throt_device_show_func(event, name) \
- \
-static ssize_t therm_throt_device_show_##event##_##name( \
- struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- unsigned int cpu = dev->id; \
- ssize_t ret; \
- \
- preempt_disable(); /* CPU hotplug */ \
- if (cpu_online(cpu)) { \
- ret = sprintf(buf, "%lu\n", \
- per_cpu(thermal_state, cpu).event.name); \
- } else \
- ret = 0; \
- preempt_enable(); \
- \
- return ret; \
-}
-
-define_therm_throt_device_show_func(core_throttle, count);
-define_therm_throt_device_one_ro(core_throttle_count);
-
-define_therm_throt_device_show_func(core_power_limit, count);
-define_therm_throt_device_one_ro(core_power_limit_count);
-
-define_therm_throt_device_show_func(package_throttle, count);
-define_therm_throt_device_one_ro(package_throttle_count);
-
-define_therm_throt_device_show_func(package_power_limit, count);
-define_therm_throt_device_one_ro(package_power_limit_count);
-
-static struct attribute *thermal_throttle_attrs[] = {
- &dev_attr_core_throttle_count.attr,
- NULL
-};
-
-static struct attribute_group thermal_attr_group = {
- .attrs = thermal_throttle_attrs,
- .name = "thermal_throttle"
-};
-#endif /* CONFIG_SYSFS */
-
-#define CORE_LEVEL 0
-#define PACKAGE_LEVEL 1
-
-/***
- * therm_throt_process - Process thermal throttling event from interrupt
- * @curr: Whether the condition is current or not (boolean), since the
- * thermal interrupt normally gets called both when the thermal
- * event begins and once the event has ended.
- *
- * This function is called by the thermal interrupt after the
- * IRQ has been acknowledged.
- *
- * It will take care of rate limiting and printing messages to the syslog.
- *
- * Returns: 0 : Event should NOT be further logged, i.e. still in
- * "timeout" from previous log message.
- * 1 : Event should be logged further, and a message has been
- * printed to the syslog.
- */
-static int therm_throt_process(bool new_event, int event, int level)
-{
- struct _thermal_state *state;
- unsigned int this_cpu = smp_processor_id();
- bool old_event;
- u64 now;
- struct thermal_state *pstate = &per_cpu(thermal_state, this_cpu);
-
- now = get_jiffies_64();
- if (level == CORE_LEVEL) {
- if (event == THERMAL_THROTTLING_EVENT)
- state = &pstate->core_throttle;
- else if (event == POWER_LIMIT_EVENT)
- state = &pstate->core_power_limit;
- else
- return 0;
- } else if (level == PACKAGE_LEVEL) {
- if (event == THERMAL_THROTTLING_EVENT)
- state = &pstate->package_throttle;
- else if (event == POWER_LIMIT_EVENT)
- state = &pstate->package_power_limit;
- else
- return 0;
- } else
- return 0;
-
- old_event = state->new_event;
- state->new_event = new_event;
-
- if (new_event)
- state->count++;
-
- if (time_before64(now, state->next_check) &&
- state->count != state->last_count)
- return 0;
-
- state->next_check = now + CHECK_INTERVAL;
- state->last_count = state->count;
-
- /* if we just entered the thermal event */
- if (new_event) {
- if (event == THERMAL_THROTTLING_EVENT)
- printk(KERN_CRIT "CPU%d: %s temperature above threshold, cpu clock throttled (total events = %lu)\n",
- this_cpu,
- level == CORE_LEVEL ? "Core" : "Package",
- state->count);
- else
- printk(KERN_CRIT "CPU%d: %s power limit notification (total events = %lu)\n",
- this_cpu,
- level == CORE_LEVEL ? "Core" : "Package",
- state->count);
- return 1;
- }
- if (old_event) {
- if (event == THERMAL_THROTTLING_EVENT)
- printk(KERN_INFO "CPU%d: %s temperature/speed normal\n",
- this_cpu,
- level == CORE_LEVEL ? "Core" : "Package");
- else
- printk(KERN_INFO "CPU%d: %s power limit normal\n",
- this_cpu,
- level == CORE_LEVEL ? "Core" : "Package");
- return 1;
- }
-
- return 0;
-}
-
-static int thresh_event_valid(int event)
-{
- struct _thermal_state *state;
- unsigned int this_cpu = smp_processor_id();
- struct thermal_state *pstate = &per_cpu(thermal_state, this_cpu);
- u64 now = get_jiffies_64();
-
- state = (event == 0) ? &pstate->core_thresh0 : &pstate->core_thresh1;
-
- if (time_before64(now, state->next_check))
- return 0;
-
- state->next_check = now + CHECK_INTERVAL;
- return 1;
-}
-
-#ifdef CONFIG_SYSFS
-/* Add/Remove thermal_throttle interface for CPU device: */
-static __cpuinit int thermal_throttle_add_dev(struct device *dev,
- unsigned int cpu)
-{
- int err;
- struct cpuinfo_x86 *c = &cpu_data(cpu);
-
- err = sysfs_create_group(&dev->kobj, &thermal_attr_group);
- if (err)
- return err;
-
- if (cpu_has(c, X86_FEATURE_PLN))
- err = sysfs_add_file_to_group(&dev->kobj,
- &dev_attr_core_power_limit_count.attr,
- thermal_attr_group.name);
- if (cpu_has(c, X86_FEATURE_PTS)) {
- err = sysfs_add_file_to_group(&dev->kobj,
- &dev_attr_package_throttle_count.attr,
- thermal_attr_group.name);
- if (cpu_has(c, X86_FEATURE_PLN))
- err = sysfs_add_file_to_group(&dev->kobj,
- &dev_attr_package_power_limit_count.attr,
- thermal_attr_group.name);
- }
-
- return err;
-}
-
-static __cpuinit void thermal_throttle_remove_dev(struct device *dev)
-{
- sysfs_remove_group(&dev->kobj, &thermal_attr_group);
-}
-
-/* Mutex protecting device creation against CPU hotplug: */
-static DEFINE_MUTEX(therm_cpu_lock);
-
-/* Get notified when a cpu comes on/off. Be hotplug friendly. */
-static __cpuinit int
-thermal_throttle_cpu_callback(struct notifier_block *nfb,
- unsigned long action,
- void *hcpu)
-{
- unsigned int cpu = (unsigned long)hcpu;
- struct device *dev;
- int err = 0;
-
- dev = get_cpu_device(cpu);
-
- switch (action) {
- case CPU_UP_PREPARE:
- case CPU_UP_PREPARE_FROZEN:
- mutex_lock(&therm_cpu_lock);
- err = thermal_throttle_add_dev(dev, cpu);
- mutex_unlock(&therm_cpu_lock);
- WARN_ON(err);
- break;
- case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- mutex_lock(&therm_cpu_lock);
- thermal_throttle_remove_dev(dev);
- mutex_unlock(&therm_cpu_lock);
- break;
- }
- return notifier_from_errno(err);
-}
-
-static struct notifier_block thermal_throttle_cpu_notifier __cpuinitdata =
-{
- .notifier_call = thermal_throttle_cpu_callback,
-};
-
-static __init int thermal_throttle_init_device(void)
-{
- unsigned int cpu = 0;
- int err;
-
- if (!atomic_read(&therm_throt_en))
- return 0;
-
- register_hotcpu_notifier(&thermal_throttle_cpu_notifier);
-
-#ifdef CONFIG_HOTPLUG_CPU
- mutex_lock(&therm_cpu_lock);
-#endif
- /* connect live CPUs to sysfs */
- for_each_online_cpu(cpu) {
- err = thermal_throttle_add_dev(get_cpu_device(cpu), cpu);
- WARN_ON(err);
- }
-#ifdef CONFIG_HOTPLUG_CPU
- mutex_unlock(&therm_cpu_lock);
-#endif
-
- return 0;
-}
-device_initcall(thermal_throttle_init_device);
-
-#endif /* CONFIG_SYSFS */
-
-static void notify_thresholds(__u64 msr_val)
-{
- /* check whether the interrupt handler is defined;
- * otherwise simply return
- */
- if (!platform_thermal_notify)
- return;
-
- /* lower threshold reached */
- if ((msr_val & THERM_LOG_THRESHOLD0) && thresh_event_valid(0))
- platform_thermal_notify(msr_val);
- /* higher threshold reached */
- if ((msr_val & THERM_LOG_THRESHOLD1) && thresh_event_valid(1))
- platform_thermal_notify(msr_val);
-}
-
-/* Thermal transition interrupt handler */
-static void intel_thermal_interrupt(void)
-{
- __u64 msr_val;
-
- rdmsrl(MSR_IA32_THERM_STATUS, msr_val);
-
- /* Check for violation of core thermal thresholds*/
- notify_thresholds(msr_val);
-
- if (therm_throt_process(msr_val & THERM_STATUS_PROCHOT,
- THERMAL_THROTTLING_EVENT,
- CORE_LEVEL) != 0)
- mce_log_therm_throt_event(msr_val);
-
- if (this_cpu_has(X86_FEATURE_PLN))
- therm_throt_process(msr_val & THERM_STATUS_POWER_LIMIT,
- POWER_LIMIT_EVENT,
- CORE_LEVEL);
-
- if (this_cpu_has(X86_FEATURE_PTS)) {
- rdmsrl(MSR_IA32_PACKAGE_THERM_STATUS, msr_val);
- therm_throt_process(msr_val & PACKAGE_THERM_STATUS_PROCHOT,
- THERMAL_THROTTLING_EVENT,
- PACKAGE_LEVEL);
- if (this_cpu_has(X86_FEATURE_PLN))
- therm_throt_process(msr_val &
- PACKAGE_THERM_STATUS_POWER_LIMIT,
- POWER_LIMIT_EVENT,
- PACKAGE_LEVEL);
- }
-}
-
-static void unexpected_thermal_interrupt(void)
-{
- printk(KERN_ERR "CPU%d: Unexpected LVT thermal interrupt!\n",
- smp_processor_id());
-}
-
-static void (*smp_thermal_vector)(void) = unexpected_thermal_interrupt;
-
-asmlinkage void smp_thermal_interrupt(struct pt_regs *regs)
-{
- irq_enter();
- exit_idle();
- inc_irq_stat(irq_thermal_count);
- smp_thermal_vector();
- irq_exit();
- /* Ack only at the end to avoid potential reentry */
- ack_APIC_irq();
-}
-
-/* Thermal monitoring depends on APIC, ACPI and clock modulation */
-static int intel_thermal_supported(struct cpuinfo_x86 *c)
-{
- if (!cpu_has_apic)
- return 0;
- if (!cpu_has(c, X86_FEATURE_ACPI) || !cpu_has(c, X86_FEATURE_ACC))
- return 0;
- return 1;
-}
-
-void __init mcheck_intel_therm_init(void)
-{
- /*
- * This function is only called on boot CPU. Save the init thermal
- * LVT value on BSP and use that value to restore APs' thermal LVT
- * entry BIOS programmed later
- */
- if (intel_thermal_supported(&boot_cpu_data))
- lvtthmr_init = apic_read(APIC_LVTTHMR);
-}
-
-void intel_init_thermal(struct cpuinfo_x86 *c)
-{
- unsigned int cpu = smp_processor_id();
- int tm2 = 0;
- u32 l, h;
-
- if (!intel_thermal_supported(c))
- return;
-
- /*
- * First check if its enabled already, in which case there might
- * be some SMM goo which handles it, so we can't even put a handler
- * since it might be delivered via SMI already:
- */
- rdmsr(MSR_IA32_MISC_ENABLE, l, h);
-
- h = lvtthmr_init;
- /*
- * The initial value of thermal LVT entries on all APs always reads
- * 0x10000 because APs are woken up by BSP issuing INIT-SIPI-SIPI
- * sequence to them and LVT registers are reset to 0s except for
- * the mask bits which are set to 1s when APs receive INIT IPI.
- * If BIOS takes over the thermal interrupt and sets its interrupt
- * delivery mode to SMI (not fixed), it restores the value that the
- * BIOS has programmed on AP based on BSP's info we saved since BIOS
- * is always setting the same value for all threads/cores.
- */
- if ((h & APIC_DM_FIXED_MASK) != APIC_DM_FIXED)
- apic_write(APIC_LVTTHMR, lvtthmr_init);
-
-
- if ((l & MSR_IA32_MISC_ENABLE_TM1) && (h & APIC_DM_SMI)) {
- printk(KERN_DEBUG
- "CPU%d: Thermal monitoring handled by SMI\n", cpu);
- return;
- }
-
- /* Check whether a vector already exists */
- if (h & APIC_VECTOR_MASK) {
- printk(KERN_DEBUG
- "CPU%d: Thermal LVT vector (%#x) already installed\n",
- cpu, (h & APIC_VECTOR_MASK));
- return;
- }
-
- /* early Pentium M models use different method for enabling TM2 */
- if (cpu_has(c, X86_FEATURE_TM2)) {
- if (c->x86 == 6 && (c->x86_model == 9 || c->x86_model == 13)) {
- rdmsr(MSR_THERM2_CTL, l, h);
- if (l & MSR_THERM2_CTL_TM_SELECT)
- tm2 = 1;
- } else if (l & MSR_IA32_MISC_ENABLE_TM2)
- tm2 = 1;
- }
-
- /* We'll mask the thermal vector in the lapic till we're ready: */
- h = THERMAL_APIC_VECTOR | APIC_DM_FIXED | APIC_LVT_MASKED;
- apic_write(APIC_LVTTHMR, h);
-
- rdmsr(MSR_IA32_THERM_INTERRUPT, l, h);
- if (cpu_has(c, X86_FEATURE_PLN))
- wrmsr(MSR_IA32_THERM_INTERRUPT,
- l | (THERM_INT_LOW_ENABLE
- | THERM_INT_HIGH_ENABLE | THERM_INT_PLN_ENABLE), h);
- else
- wrmsr(MSR_IA32_THERM_INTERRUPT,
- l | (THERM_INT_LOW_ENABLE | THERM_INT_HIGH_ENABLE), h);
-
- if (cpu_has(c, X86_FEATURE_PTS)) {
- rdmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h);
- if (cpu_has(c, X86_FEATURE_PLN))
- wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT,
- l | (PACKAGE_THERM_INT_LOW_ENABLE
- | PACKAGE_THERM_INT_HIGH_ENABLE
- | PACKAGE_THERM_INT_PLN_ENABLE), h);
- else
- wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT,
- l | (PACKAGE_THERM_INT_LOW_ENABLE
- | PACKAGE_THERM_INT_HIGH_ENABLE), h);
- }
-
- smp_thermal_vector = intel_thermal_interrupt;
-
- rdmsr(MSR_IA32_MISC_ENABLE, l, h);
- wrmsr(MSR_IA32_MISC_ENABLE, l | MSR_IA32_MISC_ENABLE_TM1, h);
-
- /* Unmask the thermal vector: */
- l = apic_read(APIC_LVTTHMR);
- apic_write(APIC_LVTTHMR, l & ~APIC_LVT_MASKED);
-
- printk_once(KERN_INFO "CPU0: Thermal monitoring enabled (%s)\n",
- tm2 ? "TM2" : "TM1");
-
- /* enable thermal throttle processing */
- atomic_set(&therm_throt_en, 1);
-}