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Merge tag 'pm-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Browse Source 
Pull power management updates from Rafael  Wysocki:
 "Again, the majority of changes go into the cpufreq subsystem, but
  there are no big features this time.  The cpufreq changes that stand
  out somewhat are the governor interface rework and improvements
  related to the handling of frequency tables.  Apart from those, there
  are fixes and new device/CPU IDs in drivers, cleanups and an
  improvement of the new schedutil governor.

  Next, there are some changes in the hibernation core, including a fix
  for a nasty problem related to the MONITOR/MWAIT usage by CPU offline
  during resume from hibernation, a few core improvements related to
  memory management during resume, a couple of additional debug features
  and cleanups.

  Finally, we have some fixes and cleanups in the devfreq subsystem,
  generic power domains framework improvements related to system
  suspend/resume, support for some new chips in intel_idle and in the
  power capping RAPL driver, a new version of the AnalyzeSuspend utility
  and some assorted fixes and cleanups.

  Specifics:

   - Rework the cpufreq governor interface to make it more
     straightforward and modify the conservative governor to avoid using
     transition notifications (Rafael Wysocki).

   - Rework the handling of frequency tables by the cpufreq core to make
     it more efficient (Viresh Kumar).

   - Modify the schedutil governor to reduce the number of wakeups it
     causes to occur in cases when the CPU frequency doesn't need to be
     changed (Steve Muckle, Viresh Kumar).

   - Fix some minor issues and clean up code in the cpufreq core and
     governors (Rafael Wysocki, Viresh Kumar).

   - Add Intel Broxton support to the intel_pstate driver (Srinivas
     Pandruvada).

   - Fix problems related to the config TDP feature and to the validity
     of the MSR_HWP_INTERRUPT register in intel_pstate (Jan Kiszka,
     Srinivas Pandruvada).

   - Make intel_pstate update the cpu_frequency tracepoint even if the
     frequency doesn't change to avoid confusing powertop (Rafael
     Wysocki).

   - Clean up the usage of __init/__initdata in intel_pstate, mark some
     of its internal variables as __read_mostly and drop an unused
     structure element from it (Jisheng Zhang, Carsten Emde).

   - Clean up the usage of some duplicate MSR symbols in intel_pstate
     and turbostat (Srinivas Pandruvada).

   - Update/fix the powernv, s3c24xx and mvebu cpufreq drivers (Akshay
     Adiga, Viresh Kumar, Ben Dooks).

   - Fix a regression (introduced during the 4.5 cycle) in the
     pcc-cpufreq driver by reverting the problematic commit (Andreas
     Herrmann).

   - Add support for Intel Denverton to intel_idle, clean up Broxton
     support in it and make it explicitly non-modular (Jacob Pan, Jan
     Beulich, Paul Gortmaker).

   - Add support for Denverton and Ivy Bridge server to the Intel RAPL
     power capping driver and make it more careful about the handing of
     MSRs that may not be present (Jacob Pan, Xiaolong Wang).

   - Fix resume from hibernation on x86-64 by making the CPU offline
     during resume avoid using MONITOR/MWAIT in the "play dead" loop
     which may lead to an inadvertent "revival" of a "dead" CPU and a
     page fault leading to a kernel crash from it (Rafael Wysocki).

   - Make memory management during resume from hibernation more
     straightforward (Rafael Wysocki).

   - Add debug features that should help to detect problems related to
     hibernation and resume from it (Rafael Wysocki, Chen Yu).

   - Clean up hibernation core somewhat (Rafael Wysocki).

   - Prevent KASAN from instrumenting the hibernation core which leads
     to large numbers of false-positives from it (James Morse).

   - Prevent PM (hibernate and suspend) notifiers from being called
     during the cleanup phase if they have not been called during the
     corresponding preparation phase which is possible if one of the
     other notifiers returns an error at that time (Lianwei Wang).

   - Improve suspend-related debug printout in the tasks freezer and
     clean up suspend-related console handling (Roger Lu, Borislav
     Petkov).

   - Update the AnalyzeSuspend script in the kernel sources to version
     4.2 (Todd Brandt).

   - Modify the generic power domains framework to make it handle system
     suspend/resume better (Ulf Hansson).

   - Make the runtime PM framework avoid resuming devices synchronously
     when user space changes the runtime PM settings for them and
     improve its error reporting (Rafael Wysocki, Linus Walleij).

   - Fix error paths in devfreq drivers (exynos, exynos-ppmu,
     exynos-bus) and in the core, make some devfreq code explicitly
     non-modular and change some of it into tristate (Bartlomiej
     Zolnierkiewicz, Peter Chen, Paul Gortmaker).

   - Add DT support to the generic PM clocks management code and make it
     export some more symbols (Jon Hunter, Paul Gortmaker).

   - Make the PCI PM core code slightly more robust against possible
     driver errors (Andy Shevchenko).

   - Make it possible to change DESTDIR and PREFIX in turbostat (Andy
     Shevchenko)"

* tag 'pm-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (89 commits)
  Revert "cpufreq: pcc-cpufreq: update default value of cpuinfo_transition_latency"
  PM / hibernate: Introduce test_resume mode for hibernation
  cpufreq: export cpufreq_driver_resolve_freq()
  cpufreq: Disallow ->resolve_freq() for drivers providing ->target_index()
  PCI / PM: check all fields in pci_set_platform_pm()
  cpufreq: acpi-cpufreq: use cached frequency mapping when possible
  cpufreq: schedutil: map raw required frequency to driver frequency
  cpufreq: add cpufreq_driver_resolve_freq()
  cpufreq: intel_pstate: Check cpuid for MSR_HWP_INTERRUPT
  intel_pstate: Update cpu_frequency tracepoint every time
  cpufreq: intel_pstate: clean remnant struct element
  PM / tools: scripts: AnalyzeSuspend v4.2
  x86 / hibernate: Use hlt_play_dead() when resuming from hibernation
  cpufreq: powernv: Replacing pstate_id with frequency table index
  intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate()
  PM / hibernate: Image data protection during restoration
  PM / hibernate: Add missing braces in __register_nosave_region()
  PM / hibernate: Clean up comments in snapshot.c
  PM / hibernate: Clean up function headers in snapshot.c
  PM / hibernate: Add missing braces in hibernate_setup()
  ...
This commit is contained in:
Linus Torvalds
2016-07-26 17:29:07 -07:00
parent 27b79027bc bc841e260c
commit 6453dbdda3
65 changed files with 4342 additions and 2831 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/cpu-freq/core.txt
+2 -2
View File
@@ -96,7 +96,7 @@ new - new frequency
For details about OPP, see Documentation/power/opp.txt
dev_pm_opp_init_cpufreq_table - cpufreq framework typically is initialized with
cpufreq_frequency_table_cpuinfo which is provided with the list of
cpufreq_table_validate_and_show() which is provided with the list of
frequencies that are available for operation. This function provides
a ready to use conversion routine to translate the OPP layer's internal
information about the available frequencies into a format readily
@@ -110,7 +110,7 @@ dev_pm_opp_init_cpufreq_table - cpufreq framework typically is initialized with
/* Do things */
r = dev_pm_opp_init_cpufreq_table(dev, &freq_table);
if (!r)
cpufreq_frequency_table_cpuinfo(policy, freq_table);
cpufreq_table_validate_and_show(policy, freq_table);
/* Do other things */
}
Documentation/cpu-freq/cpu-drivers.txt
+4 -6
View File
@@ -231,7 +231,7 @@ if you want to skip one entry in the table, set the frequency to
CPUFREQ_ENTRY_INVALID. The entries don't need to be in ascending
order.
By calling cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
By calling cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table);
the cpuinfo.min_freq and cpuinfo.max_freq values are detected, and
policy->min and policy->max are set to the same values. This is
@@ -244,14 +244,12 @@ policy->max, and all other criteria are met. This is helpful for the
->verify call.
int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table,
unsigned int target_freq,
unsigned int relation,
unsigned int *index);
unsigned int relation);
is the corresponding frequency table helper for the ->target
stage. Just pass the values to this function, and the unsigned int
index returns the number of the frequency table entry which contains
stage. Just pass the values to this function, and this function
returns the number of the frequency table entry which contains
the frequency the CPU shall be set to.
The following macros can be used as iterators over cpufreq_frequency_table:
Documentation/cpu-freq/pcc-cpufreq.txt
+2 -2
View File
@@ -159,8 +159,8 @@ to be strictly associated with a P-state.
2.2 cpuinfo_transition_latency:
-------------------------------
The cpuinfo_transition_latency field is CPUFREQ_ETERNAL. The PCC specification
does not include a field to expose this value currently.
The cpuinfo_transition_latency field is 0. The PCC specification does
not include a field to expose this value currently.
2.3 cpuinfo_cur_freq:
---------------------
Documentation/kernel-parameters.txt
+3
View File
@@ -3598,6 +3598,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
present during boot.
nocompress Don't compress/decompress hibernation images.
no Disable hibernation and resume.
protect_image Turn on image protection during restoration
(that will set all pages holding image data
during restoration read-only).
retain_initrd [RAM] Keep initrd memory after extraction
arch/powerpc/platforms/cell/cpufreq_spudemand.c
+41 -45
View File
@@ -85,61 +85,57 @@ static void spu_gov_cancel_work(struct spu_gov_info_struct *info)
cancel_delayed_work_sync(&info->work);
}
static int spu_gov_govern(struct cpufreq_policy *policy, unsigned int event)
static int spu_gov_start(struct cpufreq_policy *policy)
{
unsigned int cpu = policy->cpu;
struct spu_gov_info_struct *info, *affected_info;
struct spu_gov_info_struct *info = &per_cpu(spu_gov_info, cpu);
struct spu_gov_info_struct *affected_info;
int i;
int ret = 0;
info = &per_cpu(spu_gov_info, cpu);
switch (event) {
case CPUFREQ_GOV_START:
if (!cpu_online(cpu)) {
printk(KERN_ERR "cpu %d is not online\n", cpu);
ret = -EINVAL;
break;
}
if (!policy->cur) {
printk(KERN_ERR "no cpu specified in policy\n");
ret = -EINVAL;
break;
}
/* initialize spu_gov_info for all affected cpus */
for_each_cpu(i, policy->cpus) {
affected_info = &per_cpu(spu_gov_info, i);
affected_info->policy = policy;
}
info->poll_int = POLL_TIME;
/* setup timer */
spu_gov_init_work(info);
break;
case CPUFREQ_GOV_STOP:
/* cancel timer */
spu_gov_cancel_work(info);
/* clean spu_gov_info for all affected cpus */
for_each_cpu (i, policy->cpus) {
info = &per_cpu(spu_gov_info, i);
info->policy = NULL;
}
break;
if (!cpu_online(cpu)) {
printk(KERN_ERR "cpu %d is not online\n", cpu);
return -EINVAL;
}
return ret;
if (!policy->cur) {
printk(KERN_ERR "no cpu specified in policy\n");
return -EINVAL;
}
/* initialize spu_gov_info for all affected cpus */
for_each_cpu(i, policy->cpus) {
affected_info = &per_cpu(spu_gov_info, i);
affected_info->policy = policy;
}
info->poll_int = POLL_TIME;
/* setup timer */
spu_gov_init_work(info);
return 0;
}
static void spu_gov_stop(struct cpufreq_policy *policy)
{
unsigned int cpu = policy->cpu;
struct spu_gov_info_struct *info = &per_cpu(spu_gov_info, cpu);
int i;
/* cancel timer */
spu_gov_cancel_work(info);
/* clean spu_gov_info for all affected cpus */
for_each_cpu (i, policy->cpus) {
info = &per_cpu(spu_gov_info, i);
info->policy = NULL;
}
}
static struct cpufreq_governor spu_governor = {
.name = "spudemand",
.governor = spu_gov_govern,
.start = spu_gov_start,
.stop = spu_gov_stop,
.owner = THIS_MODULE,
};
arch/x86/include/asm/msr-index.h
-2
View File
@@ -64,8 +64,6 @@
#define MSR_OFFCORE_RSP_0 0x000001a6
#define MSR_OFFCORE_RSP_1 0x000001a7
#define MSR_NHM_TURBO_RATIO_LIMIT 0x000001ad
#define MSR_IVT_TURBO_RATIO_LIMIT 0x000001ae
#define MSR_TURBO_RATIO_LIMIT 0x000001ad
#define MSR_TURBO_RATIO_LIMIT1 0x000001ae
#define MSR_TURBO_RATIO_LIMIT2 0x000001af
arch/x86/include/asm/smp.h
+1
View File
@@ -135,6 +135,7 @@ int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
int native_cpu_disable(void);
int common_cpu_die(unsigned int cpu);
void native_cpu_die(unsigned int cpu);
void hlt_play_dead(void);
void native_play_dead(void);
void play_dead_common(void);
void wbinvd_on_cpu(int cpu);
arch/x86/kernel/smpboot.c
+1 -1
View File
@@ -1644,7 +1644,7 @@ static inline void mwait_play_dead(void)
}
}
static inline void hlt_play_dead(void)
void hlt_play_dead(void)
{
if (__this_cpu_read(cpu_info.x86) >= 4)
wbinvd();
arch/x86/power/cpu.c
+30
View File
@@ -12,6 +12,7 @@
#include <linux/export.h>
#include <linux/smp.h>
#include <linux/perf_event.h>
#include <linux/tboot.h>
#include <asm/pgtable.h>
#include <asm/proto.h>
@@ -266,6 +267,35 @@ void notrace restore_processor_state(void)
EXPORT_SYMBOL(restore_processor_state);
#endif
#if defined(CONFIG_HIBERNATION) && defined(CONFIG_HOTPLUG_CPU)
static void resume_play_dead(void)
{
play_dead_common();
tboot_shutdown(TB_SHUTDOWN_WFS);
hlt_play_dead();
}
int hibernate_resume_nonboot_cpu_disable(void)
{
void (*play_dead)(void) = smp_ops.play_dead;
int ret;
/*
* Ensure that MONITOR/MWAIT will not be used in the "play dead" loop
* during hibernate image restoration, because it is likely that the
* monitored address will be actually written to at that time and then
* the "dead" CPU will attempt to execute instructions again, but the
* address in its instruction pointer may not be possible to resolve
* any more at that point (the page tables used by it previously may
* have been overwritten by hibernate image data).
*/
smp_ops.play_dead = resume_play_dead;
ret = disable_nonboot_cpus();
smp_ops.play_dead = play_dead;
return ret;
}
#endif
/*
* When bsp_check() is called in hibernate and suspend, cpu hotplug
* is disabled already. So it's unnessary to handle race condition between
drivers/base/power/clock_ops.c
+45
View File
@@ -121,6 +121,7 @@ int pm_clk_add(struct device *dev, const char *con_id)
{
return __pm_clk_add(dev, con_id, NULL);
}
EXPORT_SYMBOL_GPL(pm_clk_add);
/**
* pm_clk_add_clk - Start using a device clock for power management.
@@ -136,8 +137,41 @@ int pm_clk_add_clk(struct device *dev, struct clk *clk)
{
return __pm_clk_add(dev, NULL, clk);
}
EXPORT_SYMBOL_GPL(pm_clk_add_clk);
/**
* of_pm_clk_add_clk - Start using a device clock for power management.
* @dev: Device whose clock is going to be used for power management.
* @name: Name of clock that is going to be used for power management.
*
* Add the clock described in the 'clocks' device-tree node that matches
* with the 'name' provided, to the list of clocks used for the power
* management of @dev. On success, returns 0. Returns a negative error
* code if the clock is not found or cannot be added.
*/
int of_pm_clk_add_clk(struct device *dev, const char *name)
{
struct clk *clk;
int ret;
if (!dev || !dev->of_node || !name)
return -EINVAL;
clk = of_clk_get_by_name(dev->of_node, name);
if (IS_ERR(clk))
return PTR_ERR(clk);
ret = pm_clk_add_clk(dev, clk);
if (ret) {
clk_put(clk);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(of_pm_clk_add_clk);
/**
* of_pm_clk_add_clks - Start using device clock(s) for power management.
* @dev: Device whose clock(s) is going to be used for power management.
@@ -192,6 +226,7 @@ error:
return ret;
}
EXPORT_SYMBOL_GPL(of_pm_clk_add_clks);
/**
* __pm_clk_remove - Destroy PM clock entry.
@@ -252,6 +287,7 @@ void pm_clk_remove(struct device *dev, const char *con_id)
__pm_clk_remove(ce);
}
EXPORT_SYMBOL_GPL(pm_clk_remove);
/**
* pm_clk_remove_clk - Stop using a device clock for power management.
@@ -285,6 +321,7 @@ void pm_clk_remove_clk(struct device *dev, struct clk *clk)
__pm_clk_remove(ce);
}
EXPORT_SYMBOL_GPL(pm_clk_remove_clk);
/**
* pm_clk_init - Initialize a device's list of power management clocks.
@@ -299,6 +336,7 @@ void pm_clk_init(struct device *dev)
if (psd)
INIT_LIST_HEAD(&psd->clock_list);
}
EXPORT_SYMBOL_GPL(pm_clk_init);
/**
* pm_clk_create - Create and initialize a device's list of PM clocks.
@@ -311,6 +349,7 @@ int pm_clk_create(struct device *dev)
{
return dev_pm_get_subsys_data(dev);
}
EXPORT_SYMBOL_GPL(pm_clk_create);
/**
* pm_clk_destroy - Destroy a device's list of power management clocks.
@@ -345,6 +384,7 @@ void pm_clk_destroy(struct device *dev)
__pm_clk_remove(ce);
}
}
EXPORT_SYMBOL_GPL(pm_clk_destroy);
/**
* pm_clk_suspend - Disable clocks in a device's PM clock list.
@@ -375,6 +415,7 @@ int pm_clk_suspend(struct device *dev)
return 0;
}
EXPORT_SYMBOL_GPL(pm_clk_suspend);
/**
* pm_clk_resume - Enable clocks in a device's PM clock list.
@@ -400,6 +441,7 @@ int pm_clk_resume(struct device *dev)
return 0;
}
EXPORT_SYMBOL_GPL(pm_clk_resume);
/**
* pm_clk_notify - Notify routine for device addition and removal.
@@ -480,6 +522,7 @@ int pm_clk_runtime_suspend(struct device *dev)
return 0;
}
EXPORT_SYMBOL_GPL(pm_clk_runtime_suspend);
int pm_clk_runtime_resume(struct device *dev)
{
@@ -495,6 +538,7 @@ int pm_clk_runtime_resume(struct device *dev)
return pm_generic_runtime_resume(dev);
}
EXPORT_SYMBOL_GPL(pm_clk_runtime_resume);
#else /* !CONFIG_PM_CLK */
@@ -598,3 +642,4 @@ void pm_clk_add_notifier(struct bus_type *bus,
clknb->nb.notifier_call = pm_clk_notify;
bus_register_notifier(bus, &clknb->nb);
}
EXPORT_SYMBOL_GPL(pm_clk_add_notifier);
drivers/base/power/domain.c
+54 -247
View File
@@ -187,8 +187,7 @@ static int genpd_poweron(struct generic_pm_domain *genpd, unsigned int depth)
struct gpd_link *link;
int ret = 0;
if (genpd->status == GPD_STATE_ACTIVE
|| (genpd->prepared_count > 0 && genpd->suspend_power_off))
if (genpd->status == GPD_STATE_ACTIVE)
return 0;
/*
@@ -735,81 +734,23 @@ static int pm_genpd_prepare(struct device *dev)
mutex_lock(&genpd->lock);
if (genpd->prepared_count++ == 0) {
if (genpd->prepared_count++ == 0)
genpd->suspended_count = 0;
genpd->suspend_power_off = genpd->status == GPD_STATE_POWER_OFF;
}
mutex_unlock(&genpd->lock);
if (genpd->suspend_power_off)
return 0;
/*
* The PM domain must be in the GPD_STATE_ACTIVE state at this point,
* so genpd_poweron() will return immediately, but if the device
* is suspended (e.g. it's been stopped by genpd_stop_dev()), we need
* to make it operational.
*/
pm_runtime_resume(dev);
__pm_runtime_disable(dev, false);
ret = pm_generic_prepare(dev);
if (ret) {
mutex_lock(&genpd->lock);
if (--genpd->prepared_count == 0)
genpd->suspend_power_off = false;
genpd->prepared_count--;
mutex_unlock(&genpd->lock);
pm_runtime_enable(dev);
}
return ret;
}
/**
* pm_genpd_suspend - Suspend a device belonging to an I/O PM domain.
* @dev: Device to suspend.
*
* Suspend a device under the assumption that its pm_domain field points to the
* domain member of an object of type struct generic_pm_domain representing
* a PM domain consisting of I/O devices.
*/
static int pm_genpd_suspend(struct device *dev)
{
struct generic_pm_domain *genpd;
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : pm_generic_suspend(dev);
}
/**
* pm_genpd_suspend_late - Late suspend of a device from an I/O PM domain.
* @dev: Device to suspend.
*
* Carry out a late suspend of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a PM domain consisting of I/O devices.
*/
static int pm_genpd_suspend_late(struct device *dev)
{
struct generic_pm_domain *genpd;
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : pm_generic_suspend_late(dev);
}
/**
* pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
* @dev: Device to suspend.
@@ -820,6 +761,7 @@ static int pm_genpd_suspend_late(struct device *dev)
static int pm_genpd_suspend_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret;
dev_dbg(dev, "%s()\n", __func__);
@@ -827,11 +769,14 @@ static int pm_genpd_suspend_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
if (genpd->suspend_power_off
|| (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev)))
if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))
return 0;
genpd_stop_dev(genpd, dev);
if (genpd->dev_ops.stop && genpd->dev_ops.start) {
ret = pm_runtime_force_suspend(dev);
if (ret)
return ret;
}
/*
* Since all of the "noirq" callbacks are executed sequentially, it is
@@ -853,6 +798,7 @@ static int pm_genpd_suspend_noirq(struct device *dev)
static int pm_genpd_resume_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret = 0;
dev_dbg(dev, "%s()\n", __func__);
@@ -860,8 +806,7 @@ static int pm_genpd_resume_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
if (genpd->suspend_power_off
|| (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev)))
if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))
return 0;
/*
@@ -872,93 +817,10 @@ static int pm_genpd_resume_noirq(struct device *dev)
pm_genpd_sync_poweron(genpd, true);
genpd->suspended_count--;
return genpd_start_dev(genpd, dev);
}
if (genpd->dev_ops.stop && genpd->dev_ops.start)
ret = pm_runtime_force_resume(dev);
/**
* pm_genpd_resume_early - Early resume of a device in an I/O PM domain.
* @dev: Device to resume.
*
* Carry out an early resume of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a power domain consisting of I/O
* devices.
*/
static int pm_genpd_resume_early(struct device *dev)
{
struct generic_pm_domain *genpd;
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : pm_generic_resume_early(dev);
}
/**
* pm_genpd_resume - Resume of device in an I/O PM domain.
* @dev: Device to resume.
*
* Resume a device under the assumption that its pm_domain field points to the
* domain member of an object of type struct generic_pm_domain representing
* a power domain consisting of I/O devices.
*/
static int pm_genpd_resume(struct device *dev)
{
struct generic_pm_domain *genpd;
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : pm_generic_resume(dev);
}
/**
* pm_genpd_freeze - Freezing a device in an I/O PM domain.
* @dev: Device to freeze.
*
* Freeze a device under the assumption that its pm_domain field points to the
* domain member of an object of type struct generic_pm_domain representing
* a power domain consisting of I/O devices.
*/
static int pm_genpd_freeze(struct device *dev)
{
struct generic_pm_domain *genpd;
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : pm_generic_freeze(dev);
}
/**
* pm_genpd_freeze_late - Late freeze of a device in an I/O PM domain.
* @dev: Device to freeze.
*
* Carry out a late freeze of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a power domain consisting of I/O
* devices.
*/
static int pm_genpd_freeze_late(struct device *dev)
{
struct generic_pm_domain *genpd;
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : pm_generic_freeze_late(dev);
return ret;
}
/**
@@ -973,6 +835,7 @@ static int pm_genpd_freeze_late(struct device *dev)
static int pm_genpd_freeze_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret = 0;
dev_dbg(dev, "%s()\n", __func__);
@@ -980,7 +843,10 @@ static int pm_genpd_freeze_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : genpd_stop_dev(genpd, dev);
if (genpd->dev_ops.stop && genpd->dev_ops.start)
ret = pm_runtime_force_suspend(dev);
return ret;
}
/**
@@ -993,6 +859,7 @@ static int pm_genpd_freeze_noirq(struct device *dev)
static int pm_genpd_thaw_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret = 0;
dev_dbg(dev, "%s()\n", __func__);
@@ -1000,51 +867,10 @@ static int pm_genpd_thaw_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ?
0 : genpd_start_dev(genpd, dev);
}
if (genpd->dev_ops.stop && genpd->dev_ops.start)
ret = pm_runtime_force_resume(dev);
/**
* pm_genpd_thaw_early - Early thaw of device in an I/O PM domain.
* @dev: Device to thaw.
*
* Carry out an early thaw of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a power domain consisting of I/O
* devices.
*/
static int pm_genpd_thaw_early(struct device *dev)
{
struct generic_pm_domain *genpd;
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : pm_generic_thaw_early(dev);
}
/**
* pm_genpd_thaw - Thaw a device belonging to an I/O power domain.
* @dev: Device to thaw.
*
* Thaw a device under the assumption that its pm_domain field points to the
* domain member of an object of type struct generic_pm_domain representing
* a power domain consisting of I/O devices.
*/
static int pm_genpd_thaw(struct device *dev)
{
struct generic_pm_domain *genpd;
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : pm_generic_thaw(dev);
return ret;
}
/**
@@ -1057,6 +883,7 @@ static int pm_genpd_thaw(struct device *dev)
static int pm_genpd_restore_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret = 0;
dev_dbg(dev, "%s()\n", __func__);
@@ -1072,30 +899,20 @@ static int pm_genpd_restore_noirq(struct device *dev)
* At this point suspended_count == 0 means we are being run for the
* first time for the given domain in the present cycle.
*/
if (genpd->suspended_count++ == 0) {
if (genpd->suspended_count++ == 0)
/*
* The boot kernel might put the domain into arbitrary state,
* so make it appear as powered off to pm_genpd_sync_poweron(),
* so that it tries to power it on in case it was really off.
*/
genpd->status = GPD_STATE_POWER_OFF;
if (genpd->suspend_power_off) {
/*
* If the domain was off before the hibernation, make
* sure it will be off going forward.
*/
genpd_power_off(genpd, true);
return 0;
}
}
if (genpd->suspend_power_off)
return 0;
pm_genpd_sync_poweron(genpd, true);
return genpd_start_dev(genpd, dev);
if (genpd->dev_ops.stop && genpd->dev_ops.start)
ret = pm_runtime_force_resume(dev);
return ret;
}
/**
@@ -1110,7 +927,6 @@ static int pm_genpd_restore_noirq(struct device *dev)
static void pm_genpd_complete(struct device *dev)
{
struct generic_pm_domain *genpd;
bool run_complete;
dev_dbg(dev, "%s()\n", __func__);
@@ -1118,20 +934,15 @@ static void pm_genpd_complete(struct device *dev)
if (IS_ERR(genpd))
return;
pm_generic_complete(dev);
mutex_lock(&genpd->lock);
run_complete = !genpd->suspend_power_off;
if (--genpd->prepared_count == 0)
genpd->suspend_power_off = false;
genpd->prepared_count--;
if (!genpd->prepared_count)
genpd_queue_power_off_work(genpd);
mutex_unlock(&genpd->lock);
if (run_complete) {
pm_generic_complete(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_request_idle(dev);
}
}
/**
@@ -1173,18 +984,10 @@ EXPORT_SYMBOL_GPL(pm_genpd_syscore_poweron);
#else /* !CONFIG_PM_SLEEP */
#define pm_genpd_prepare NULL
#define pm_genpd_suspend NULL
#define pm_genpd_suspend_late NULL
#define pm_genpd_suspend_noirq NULL
#define pm_genpd_resume_early NULL
#define pm_genpd_resume_noirq NULL
#define pm_genpd_resume NULL
#define pm_genpd_freeze NULL
#define pm_genpd_freeze_late NULL
#define pm_genpd_freeze_noirq NULL
#define pm_genpd_thaw_early NULL
#define pm_genpd_thaw_noirq NULL
#define pm_genpd_thaw NULL
#define pm_genpd_restore_noirq NULL
#define pm_genpd_complete NULL
@@ -1455,12 +1258,14 @@ EXPORT_SYMBOL_GPL(pm_genpd_remove_subdomain);
* @genpd: PM domain object to initialize.
* @gov: PM domain governor to associate with the domain (may be NULL).
* @is_off: Initial value of the domain's power_is_off field.
*
* Returns 0 on successful initialization, else a negative error code.
*/
void pm_genpd_init(struct generic_pm_domain *genpd,
struct dev_power_governor *gov, bool is_off)
int pm_genpd_init(struct generic_pm_domain *genpd,
struct dev_power_governor *gov, bool is_off)
{
if (IS_ERR_OR_NULL(genpd))
return;
return -EINVAL;
INIT_LIST_HEAD(&genpd->master_links);
INIT_LIST_HEAD(&genpd->slave_links);
@@ -1476,24 +1281,24 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
genpd->domain.ops.runtime_suspend = genpd_runtime_suspend;
genpd->domain.ops.runtime_resume = genpd_runtime_resume;
genpd->domain.ops.prepare = pm_genpd_prepare;
genpd->domain.ops.suspend = pm_genpd_suspend;
genpd->domain.ops.suspend_late = pm_genpd_suspend_late;
genpd->domain.ops.suspend = pm_generic_suspend;
genpd->domain.ops.suspend_late = pm_generic_suspend_late;
genpd->domain.ops.suspend_noirq = pm_genpd_suspend_noirq;
genpd->domain.ops.resume_noirq = pm_genpd_resume_noirq;
genpd->domain.ops.resume_early = pm_genpd_resume_early;
genpd->domain.ops.resume = pm_genpd_resume;
genpd->domain.ops.freeze = pm_genpd_freeze;
genpd->domain.ops.freeze_late = pm_genpd_freeze_late;
genpd->domain.ops.resume_early = pm_generic_resume_early;
genpd->domain.ops.resume = pm_generic_resume;
genpd->domain.ops.freeze = pm_generic_freeze;
genpd->domain.ops.freeze_late = pm_generic_freeze_late;
genpd->domain.ops.freeze_noirq = pm_genpd_freeze_noirq;
genpd->domain.ops.thaw_noirq = pm_genpd_thaw_noirq;
genpd->domain.ops.thaw_early = pm_genpd_thaw_early;
genpd->domain.ops.thaw = pm_genpd_thaw;
genpd->domain.ops.poweroff = pm_genpd_suspend;
genpd->domain.ops.poweroff_late = pm_genpd_suspend_late;
genpd->domain.ops.thaw_early = pm_generic_thaw_early;
genpd->domain.ops.thaw = pm_generic_thaw;
genpd->domain.ops.poweroff = pm_generic_poweroff;
genpd->domain.ops.poweroff_late = pm_generic_poweroff_late;
genpd->domain.ops.poweroff_noirq = pm_genpd_suspend_noirq;
genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq;
genpd->domain.ops.restore_early = pm_genpd_resume_early;
genpd->domain.ops.restore = pm_genpd_resume;
genpd->domain.ops.restore_early = pm_generic_restore_early;
genpd->domain.ops.restore = pm_generic_restore;
genpd->domain.ops.complete = pm_genpd_complete;
if (genpd->flags & GENPD_FLAG_PM_CLK) {
@@ -1518,6 +1323,8 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
mutex_lock(&gpd_list_lock);
list_add(&genpd->gpd_list_node, &gpd_list);
mutex_unlock(&gpd_list_lock);
return 0;
}
EXPORT_SYMBOL_GPL(pm_genpd_init);
drivers/base/power/runtime.c
+10 -3
View File
@@ -1045,10 +1045,14 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
*/
if (!parent->power.disable_depth
&& !parent->power.ignore_children
&& parent->power.runtime_status != RPM_ACTIVE)
&& parent->power.runtime_status != RPM_ACTIVE) {
dev_err(dev, "runtime PM trying to activate child device %s but parent (%s) is not active\n",
dev_name(dev),
dev_name(parent));
error = -EBUSY;
else if (dev->power.runtime_status == RPM_SUSPENDED)
} else if (dev->power.runtime_status == RPM_SUSPENDED) {
atomic_inc(&parent->power.child_count);
}
spin_unlock(&parent->power.lock);
@@ -1256,7 +1260,7 @@ void pm_runtime_allow(struct device *dev)
dev->power.runtime_auto = true;
if (atomic_dec_and_test(&dev->power.usage_count))
rpm_idle(dev, RPM_AUTO);
rpm_idle(dev, RPM_AUTO | RPM_ASYNC);
out:
spin_unlock_irq(&dev->power.lock);
@@ -1506,6 +1510,9 @@ int pm_runtime_force_resume(struct device *dev)
goto out;
}
if (!pm_runtime_status_suspended(dev))
goto out;
ret = pm_runtime_set_active(dev);
if (ret)
goto out;
drivers/cpufreq/Kconfig
+4 -9
View File
@@ -31,23 +31,18 @@ config CPU_FREQ_BOOST_SW
depends on THERMAL
config CPU_FREQ_STAT
tristate "CPU frequency translation statistics"
bool "CPU frequency transition statistics"
default y
help
This driver exports CPU frequency statistics information through sysfs
file system.
To compile this driver as a module, choose M here: the
module will be called cpufreq_stats.
Export CPU frequency statistics information through sysfs.
If in doubt, say N.
config CPU_FREQ_STAT_DETAILS
bool "CPU frequency translation statistics details"
bool "CPU frequency transition statistics details"
depends on CPU_FREQ_STAT
help
This will show detail CPU frequency translation table in sysfs file
system.
Show detailed CPU frequency transition table in sysfs.
If in doubt, say N.
drivers/cpufreq/acpi-cpufreq.c
+7 -10
View File
@@ -468,20 +468,17 @@ unsigned int acpi_cpufreq_fast_switch(struct cpufreq_policy *policy,
struct acpi_cpufreq_data *data = policy->driver_data;
struct acpi_processor_performance *perf;
struct cpufreq_frequency_table *entry;
unsigned int next_perf_state, next_freq, freq;
unsigned int next_perf_state, next_freq, index;
/*
* Find the closest frequency above target_freq.
*
* The table is sorted in the reverse order with respect to the
* frequency and all of the entries are valid (see the initialization).
*/
entry = policy->freq_table;
do {
entry++;
freq = entry->frequency;
} while (freq >= target_freq && freq != CPUFREQ_TABLE_END);
entry--;
if (policy->cached_target_freq == target_freq)
index = policy->cached_resolved_idx;
else
index = cpufreq_table_find_index_dl(policy, target_freq);
entry = &policy->freq_table[index];
next_freq = entry->frequency;
next_perf_state = entry->driver_data;
drivers/cpufreq/amd_freq_sensitivity.c
+4 -6
View File
@@ -48,9 +48,8 @@ static unsigned int amd_powersave_bias_target(struct cpufreq_policy *policy,
struct policy_dbs_info *policy_dbs = policy->governor_data;
struct dbs_data *od_data = policy_dbs->dbs_data;
struct od_dbs_tuners *od_tuners = od_data->tuners;
struct od_policy_dbs_info *od_info = to_dbs_info(policy_dbs);
if (!od_info->freq_table)
if (!policy->freq_table)
return freq_next;
rdmsr_on_cpu(policy->cpu, MSR_AMD64_FREQ_SENSITIVITY_ACTUAL,
@@ -92,10 +91,9 @@ static unsigned int amd_powersave_bias_target(struct cpufreq_policy *policy,
else {
unsigned int index;
cpufreq_frequency_table_target(policy,
od_info->freq_table, policy->cur - 1,
CPUFREQ_RELATION_H, &index);
freq_next = od_info->freq_table[index].frequency;
index = cpufreq_table_find_index_h(policy,
policy->cur - 1);
freq_next = policy->freq_table[index].frequency;
}
data->freq_prev = freq_next;
drivers/cpufreq/cpufreq.c
+135 -86
View File
@@ -74,19 +74,12 @@ static inline bool has_target(void)
}
/* internal prototypes */
static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event);
static unsigned int __cpufreq_get(struct cpufreq_policy *policy);
static int cpufreq_init_governor(struct cpufreq_policy *policy);
static void cpufreq_exit_governor(struct cpufreq_policy *policy);
static int cpufreq_start_governor(struct cpufreq_policy *policy);
static inline void cpufreq_exit_governor(struct cpufreq_policy *policy)
{
(void)cpufreq_governor(policy, CPUFREQ_GOV_POLICY_EXIT);
}
static inline void cpufreq_stop_governor(struct cpufreq_policy *policy)
{
(void)cpufreq_governor(policy, CPUFREQ_GOV_STOP);
}
static void cpufreq_stop_governor(struct cpufreq_policy *policy);
static void cpufreq_governor_limits(struct cpufreq_policy *policy);
/**
* Two notifier lists: the "policy" list is involved in the
@@ -133,15 +126,6 @@ struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy)
}
EXPORT_SYMBOL_GPL(get_governor_parent_kobj);
struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu)
{
struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
return policy && !policy_is_inactive(policy) ?
policy->freq_table : NULL;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table);
static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
{
u64 idle_time;
@@ -354,6 +338,7 @@ static void __cpufreq_notify_transition(struct cpufreq_policy *policy,
pr_debug("FREQ: %lu - CPU: %lu\n",
(unsigned long)freqs->new, (unsigned long)freqs->cpu);
trace_cpu_frequency(freqs->new, freqs->cpu);
cpufreq_stats_record_transition(policy, freqs->new);
srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
CPUFREQ_POSTCHANGE, freqs);
if (likely(policy) && likely(policy->cpu == freqs->cpu))
@@ -507,6 +492,38 @@ void cpufreq_disable_fast_switch(struct cpufreq_policy *policy)
}
EXPORT_SYMBOL_GPL(cpufreq_disable_fast_switch);
/**
* cpufreq_driver_resolve_freq - Map a target frequency to a driver-supported
* one.
* @target_freq: target frequency to resolve.
*
* The target to driver frequency mapping is cached in the policy.
*
* Return: Lowest driver-supported frequency greater than or equal to the
* given target_freq, subject to policy (min/max) and driver limitations.
*/
unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
unsigned int target_freq)
{
target_freq = clamp_val(target_freq, policy->min, policy->max);
policy->cached_target_freq = target_freq;
if (cpufreq_driver->target_index) {
int idx;
idx = cpufreq_frequency_table_target(policy, target_freq,
CPUFREQ_RELATION_L);
policy->cached_resolved_idx = idx;
return policy->freq_table[idx].frequency;
}
if (cpufreq_driver->resolve_freq)
return cpufreq_driver->resolve_freq(policy, target_freq);
return target_freq;
}
EXPORT_SYMBOL_GPL(cpufreq_driver_resolve_freq);
/*********************************************************************
* SYSFS INTERFACE *
*********************************************************************/
@@ -1115,6 +1132,7 @@ static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy, bool notify)
CPUFREQ_REMOVE_POLICY, policy);
down_write(&policy->rwsem);
cpufreq_stats_free_table(policy);
cpufreq_remove_dev_symlink(policy);
kobj = &policy->kobj;
cmp = &policy->kobj_unregister;
@@ -1265,13 +1283,12 @@ static int cpufreq_online(unsigned int cpu)
}
}
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_START, policy);
if (new_policy) {
ret = cpufreq_add_dev_interface(policy);
if (ret)
goto out_exit_policy;
cpufreq_stats_create_table(policy);
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_CREATE_POLICY, policy);
@@ -1280,6 +1297,9 @@ static int cpufreq_online(unsigned int cpu)
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
}
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_START, policy);
ret = cpufreq_init_policy(policy);
if (ret) {
pr_err("%s: Failed to initialize policy for cpu: %d (%d)\n",
@@ -1556,9 +1576,6 @@ static unsigned int cpufreq_update_current_freq(struct cpufreq_policy *policy)
{
unsigned int new_freq;
if (cpufreq_suspended)
return 0;
new_freq = cpufreq_driver->get(policy->cpu);
if (!new_freq)
return 0;
@@ -1864,14 +1881,17 @@ static int __target_intermediate(struct cpufreq_policy *policy,
return ret;
}
static int __target_index(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *freq_table, int index)
static int __target_index(struct cpufreq_policy *policy, int index)
{
struct cpufreq_freqs freqs = {.old = policy->cur, .flags = 0};
unsigned int intermediate_freq = 0;
unsigned int newfreq = policy->freq_table[index].frequency;
int retval = -EINVAL;
bool notify;
if (newfreq == policy->cur)
return 0;
notify = !(cpufreq_driver->flags & CPUFREQ_ASYNC_NOTIFICATION);
if (notify) {
/* Handle switching to intermediate frequency */
@@ -1886,7 +1906,7 @@ static int __target_index(struct cpufreq_policy *policy,
freqs.old = freqs.new;
}
freqs.new = freq_table[index].frequency;
freqs.new = newfreq;
pr_debug("%s: cpu: %d, oldfreq: %u, new freq: %u\n",
__func__, policy->cpu, freqs.old, freqs.new);
@@ -1923,17 +1943,13 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
unsigned int relation)
{
unsigned int old_target_freq = target_freq;
struct cpufreq_frequency_table *freq_table;
int index, retval;
int index;
if (cpufreq_disabled())
return -ENODEV;
/* Make sure that target_freq is within supported range */
if (target_freq > policy->max)
target_freq = policy->max;
if (target_freq < policy->min)
target_freq = policy->min;
target_freq = clamp_val(target_freq, policy->min, policy->max);
pr_debug("target for CPU %u: %u kHz, relation %u, requested %u kHz\n",
policy->cpu, target_freq, relation, old_target_freq);
@@ -1956,23 +1972,9 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
if (!cpufreq_driver->target_index)
return -EINVAL;
freq_table = cpufreq_frequency_get_table(policy->cpu);
if (unlikely(!freq_table)) {
pr_err("%s: Unable to find freq_table\n", __func__);
return -EINVAL;
}
index = cpufreq_frequency_table_target(policy, target_freq, relation);
retval = cpufreq_frequency_table_target(policy, freq_table, target_freq,
relation, &index);
if (unlikely(retval)) {
pr_err("%s: Unable to find matching freq\n", __func__);
return retval;
}
if (freq_table[index].frequency == policy->cur)
return 0;
return __target_index(policy, freq_table, index);
return __target_index(policy, index);
}
EXPORT_SYMBOL_GPL(__cpufreq_driver_target);
@@ -1997,7 +1999,7 @@ __weak struct cpufreq_governor *cpufreq_fallback_governor(void)
return NULL;
}
static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
static int cpufreq_init_governor(struct cpufreq_policy *policy)
{
int ret;
@@ -2025,36 +2027,82 @@ static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
}
}
if (event == CPUFREQ_GOV_POLICY_INIT)
if (!try_module_get(policy->governor->owner))
return -EINVAL;
if (!try_module_get(policy->governor->owner))
return -EINVAL;
pr_debug("%s: for CPU %u, event %u\n", __func__, policy->cpu, event);
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
ret = policy->governor->governor(policy, event);
if (event == CPUFREQ_GOV_POLICY_INIT) {
if (ret)
if (policy->governor->init) {
ret = policy->governor->init(policy);
if (ret) {
module_put(policy->governor->owner);
else
policy->governor->initialized++;
} else if (event == CPUFREQ_GOV_POLICY_EXIT) {
policy->governor->initialized--;
module_put(policy->governor->owner);
return ret;
}
}
return ret;
return 0;
}
static void cpufreq_exit_governor(struct cpufreq_policy *policy)
{
if (cpufreq_suspended || !policy->governor)
return;
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
if (policy->governor->exit)
policy->governor->exit(policy);
module_put(policy->governor->owner);
}
static int cpufreq_start_governor(struct cpufreq_policy *policy)
{
int ret;
if (cpufreq_suspended)
return 0;
if (!policy->governor)
return -EINVAL;
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
if (cpufreq_driver->get && !cpufreq_driver->setpolicy)
cpufreq_update_current_freq(policy);
ret = cpufreq_governor(policy, CPUFREQ_GOV_START);
return ret ? ret : cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
if (policy->governor->start) {
ret = policy->governor->start(policy);
if (ret)
return ret;
}
if (policy->governor->limits)
policy->governor->limits(policy);
return 0;
}
static void cpufreq_stop_governor(struct cpufreq_policy *policy)
{
if (cpufreq_suspended || !policy->governor)
return;
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
if (policy->governor->stop)
policy->governor->stop(policy);
}
static void cpufreq_governor_limits(struct cpufreq_policy *policy)
{
if (cpufreq_suspended || !policy->governor)
return;
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
if (policy->governor->limits)
policy->governor->limits(policy);
}
int cpufreq_register_governor(struct cpufreq_governor *governor)
@@ -2069,7 +2117,6 @@ int cpufreq_register_governor(struct cpufreq_governor *governor)
mutex_lock(&cpufreq_governor_mutex);
governor->initialized = 0;
err = -EBUSY;
if (!find_governor(governor->name)) {
err = 0;
@@ -2184,6 +2231,8 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
policy->min = new_policy->min;
policy->max = new_policy->max;
policy->cached_target_freq = UINT_MAX;
pr_debug("new min and max freqs are %u - %u kHz\n",
policy->min, policy->max);
@@ -2195,7 +2244,8 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
if (new_policy->governor == policy->governor) {
pr_debug("cpufreq: governor limits update\n");
return cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
cpufreq_governor_limits(policy);
return 0;
}
pr_debug("governor switch\n");
@@ -2210,7 +2260,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
/* start new governor */
policy->governor = new_policy->governor;
ret = cpufreq_governor(policy, CPUFREQ_GOV_POLICY_INIT);
ret = cpufreq_init_governor(policy);
if (!ret) {
ret = cpufreq_start_governor(policy);
if (!ret) {
@@ -2224,7 +2274,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
pr_debug("starting governor %s failed\n", policy->governor->name);
if (old_gov) {
policy->governor = old_gov;
if (cpufreq_governor(policy, CPUFREQ_GOV_POLICY_INIT))
if (cpufreq_init_governor(policy))
policy->governor = NULL;
else
cpufreq_start_governor(policy);
@@ -2309,26 +2359,25 @@ static struct notifier_block __refdata cpufreq_cpu_notifier = {
*********************************************************************/
static int cpufreq_boost_set_sw(int state)
{
struct cpufreq_frequency_table *freq_table;
struct cpufreq_policy *policy;
int ret = -EINVAL;
for_each_active_policy(policy) {
freq_table = cpufreq_frequency_get_table(policy->cpu);
if (freq_table) {
ret = cpufreq_frequency_table_cpuinfo(policy,
freq_table);
if (ret) {
pr_err("%s: Policy frequency update failed\n",
__func__);
break;
}
if (!policy->freq_table)
continue;
down_write(&policy->rwsem);
policy->user_policy.max = policy->max;
cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
up_write(&policy->rwsem);
ret = cpufreq_frequency_table_cpuinfo(policy,
policy->freq_table);
if (ret) {
pr_err("%s: Policy frequency update failed\n",
__func__);
break;
}
down_write(&policy->rwsem);
policy->user_policy.max = policy->max;
cpufreq_governor_limits(policy);
up_write(&policy->rwsem);
}
return ret;
drivers/cpufreq/cpufreq_conservative.c
+17 -71
View File
@@ -17,7 +17,6 @@
struct cs_policy_dbs_info {
struct policy_dbs_info policy_dbs;
unsigned int down_skip;
unsigned int requested_freq;
};
static inline struct cs_policy_dbs_info *to_dbs_info(struct policy_dbs_info *policy_dbs)
@@ -75,19 +74,17 @@ static unsigned int cs_dbs_timer(struct cpufreq_policy *policy)
/* Check for frequency increase */
if (load > dbs_data->up_threshold) {
unsigned int requested_freq = policy->cur;
dbs_info->down_skip = 0;
/* if we are already at full speed then break out early */
if (dbs_info->requested_freq == policy->max)
if (requested_freq == policy->max)
goto out;
dbs_info->requested_freq += get_freq_target(cs_tuners, policy);
requested_freq += get_freq_target(cs_tuners, policy);
if (dbs_info->requested_freq > policy->max)
dbs_info->requested_freq = policy->max;
__cpufreq_driver_target(policy, dbs_info->requested_freq,
CPUFREQ_RELATION_H);
__cpufreq_driver_target(policy, requested_freq, CPUFREQ_RELATION_H);
goto out;
}
@@ -98,36 +95,27 @@ static unsigned int cs_dbs_timer(struct cpufreq_policy *policy)
/* Check for frequency decrease */
if (load < cs_tuners->down_threshold) {
unsigned int freq_target;
unsigned int freq_target, requested_freq = policy->cur;
/*
* if we cannot reduce the frequency anymore, break out early
*/
if (policy->cur == policy->min)
if (requested_freq == policy->min)
goto out;
freq_target = get_freq_target(cs_tuners, policy);
if (dbs_info->requested_freq > freq_target)
dbs_info->requested_freq -= freq_target;
if (requested_freq > freq_target)
requested_freq -= freq_target;
else
dbs_info->requested_freq = policy->min;
requested_freq = policy->min;
__cpufreq_driver_target(policy, dbs_info->requested_freq,
CPUFREQ_RELATION_L);
__cpufreq_driver_target(policy, requested_freq, CPUFREQ_RELATION_L);
}
out:
return dbs_data->sampling_rate;
}
static int dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
void *data);
static struct notifier_block cs_cpufreq_notifier_block = {
.notifier_call = dbs_cpufreq_notifier,
};
/************************** sysfs interface ************************/
static struct dbs_governor cs_dbs_gov;
static ssize_t store_sampling_down_factor(struct gov_attr_set *attr_set,
const char *buf, size_t count)
@@ -268,15 +256,13 @@ static void cs_free(struct policy_dbs_info *policy_dbs)
kfree(to_dbs_info(policy_dbs));
}
static int cs_init(struct dbs_data *dbs_data, bool notify)
static int cs_init(struct dbs_data *dbs_data)
{
struct cs_dbs_tuners *tuners;
tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
if (!tuners) {
pr_err("%s: kzalloc failed\n", __func__);
if (!tuners)
return -ENOMEM;
}
tuners->down_threshold = DEF_FREQUENCY_DOWN_THRESHOLD;
tuners->freq_step = DEF_FREQUENCY_STEP;
@@ -288,19 +274,11 @@ static int cs_init(struct dbs_data *dbs_data, bool notify)
dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO *
jiffies_to_usecs(10);
if (notify)
cpufreq_register_notifier(&cs_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
return 0;
}
static void cs_exit(struct dbs_data *dbs_data, bool notify)
static void cs_exit(struct dbs_data *dbs_data)
{
if (notify)
cpufreq_unregister_notifier(&cs_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
kfree(dbs_data->tuners);
}
@@ -309,16 +287,10 @@ static void cs_start(struct cpufreq_policy *policy)
struct cs_policy_dbs_info *dbs_info = to_dbs_info(policy->governor_data);
dbs_info->down_skip = 0;
dbs_info->requested_freq = policy->cur;
}
static struct dbs_governor cs_dbs_gov = {
.gov = {
.name = "conservative",
.governor = cpufreq_governor_dbs,
.max_transition_latency = TRANSITION_LATENCY_LIMIT,
.owner = THIS_MODULE,
},
static struct dbs_governor cs_governor = {
.gov = CPUFREQ_DBS_GOVERNOR_INITIALIZER("conservative"),
.kobj_type = { .default_attrs = cs_attributes },
.gov_dbs_timer = cs_dbs_timer,
.alloc = cs_alloc,
@@ -328,33 +300,7 @@ static struct dbs_governor cs_dbs_gov = {
.start = cs_start,
};
#define CPU_FREQ_GOV_CONSERVATIVE (&cs_dbs_gov.gov)
static int dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
void *data)
{
struct cpufreq_freqs *freq = data;
struct cpufreq_policy *policy = cpufreq_cpu_get_raw(freq->cpu);
struct cs_policy_dbs_info *dbs_info;
if (!policy)
return 0;
/* policy isn't governed by conservative governor */
if (policy->governor != CPU_FREQ_GOV_CONSERVATIVE)
return 0;
dbs_info = to_dbs_info(policy->governor_data);
/*
* we only care if our internally tracked freq moves outside the 'valid'
* ranges of frequency available to us otherwise we do not change it
*/
if (dbs_info->requested_freq > policy->max
|| dbs_info->requested_freq < policy->min)
dbs_info->requested_freq = freq->new;
return 0;
}
#define CPU_FREQ_GOV_CONSERVATIVE (&cs_governor.gov)
static int __init cpufreq_gov_dbs_init(void)
{
drivers/cpufreq/cpufreq_governor.c
+23 -52
View File
@@ -336,17 +336,6 @@ static inline void gov_clear_update_util(struct cpufreq_policy *policy)
synchronize_sched();
}
static void gov_cancel_work(struct cpufreq_policy *policy)
{
struct policy_dbs_info *policy_dbs = policy->governor_data;
gov_clear_update_util(policy_dbs->policy);
irq_work_sync(&policy_dbs->irq_work);
cancel_work_sync(&policy_dbs->work);
atomic_set(&policy_dbs->work_count, 0);
policy_dbs->work_in_progress = false;
}
static struct policy_dbs_info *alloc_policy_dbs_info(struct cpufreq_policy *policy,
struct dbs_governor *gov)
{
@@ -389,7 +378,7 @@ static void free_policy_dbs_info(struct policy_dbs_info *policy_dbs,
gov->free(policy_dbs);
}
static int cpufreq_governor_init(struct cpufreq_policy *policy)
int cpufreq_dbs_governor_init(struct cpufreq_policy *policy)
{
struct dbs_governor *gov = dbs_governor_of(policy);
struct dbs_data *dbs_data;
@@ -429,7 +418,7 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy)
gov_attr_set_init(&dbs_data->attr_set, &policy_dbs->list);
ret = gov->init(dbs_data, !policy->governor->initialized);
ret = gov->init(dbs_data);
if (ret)
goto free_policy_dbs_info;
@@ -458,13 +447,13 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy)
goto out;
/* Failure, so roll back. */
pr_err("cpufreq: Governor initialization failed (dbs_data kobject init error %d)\n", ret);
pr_err("initialization failed (dbs_data kobject init error %d)\n", ret);
policy->governor_data = NULL;
if (!have_governor_per_policy())
gov->gdbs_data = NULL;
gov->exit(dbs_data, !policy->governor->initialized);
gov->exit(dbs_data);
kfree(dbs_data);
free_policy_dbs_info:
@@ -474,8 +463,9 @@ out:
mutex_unlock(&gov_dbs_data_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_init);
static int cpufreq_governor_exit(struct cpufreq_policy *policy)
void cpufreq_dbs_governor_exit(struct cpufreq_policy *policy)
{
struct dbs_governor *gov = dbs_governor_of(policy);
struct policy_dbs_info *policy_dbs = policy->governor_data;
@@ -493,17 +483,17 @@ static int cpufreq_governor_exit(struct cpufreq_policy *policy)
if (!have_governor_per_policy())
gov->gdbs_data = NULL;
gov->exit(dbs_data, policy->governor->initialized == 1);
gov->exit(dbs_data);
kfree(dbs_data);
}
free_policy_dbs_info(policy_dbs, gov);
mutex_unlock(&gov_dbs_data_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_exit);
static int cpufreq_governor_start(struct cpufreq_policy *policy)
int cpufreq_dbs_governor_start(struct cpufreq_policy *policy)
{
struct dbs_governor *gov = dbs_governor_of(policy);
struct policy_dbs_info *policy_dbs = policy->governor_data;
@@ -539,47 +529,28 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy)
gov_set_update_util(policy_dbs, sampling_rate);
return 0;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_start);
static int cpufreq_governor_stop(struct cpufreq_policy *policy)
void cpufreq_dbs_governor_stop(struct cpufreq_policy *policy)
{
gov_cancel_work(policy);
return 0;
}
struct policy_dbs_info *policy_dbs = policy->governor_data;
static int cpufreq_governor_limits(struct cpufreq_policy *policy)
gov_clear_update_util(policy_dbs->policy);
irq_work_sync(&policy_dbs->irq_work);
cancel_work_sync(&policy_dbs->work);
atomic_set(&policy_dbs->work_count, 0);
policy_dbs->work_in_progress = false;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_stop);
void cpufreq_dbs_governor_limits(struct cpufreq_policy *policy)
{
struct policy_dbs_info *policy_dbs = policy->governor_data;
mutex_lock(&policy_dbs->timer_mutex);
if (policy->max < policy->cur)
__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
else if (policy->min > policy->cur)
__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
cpufreq_policy_apply_limits(policy);
gov_update_sample_delay(policy_dbs, 0);
mutex_unlock(&policy_dbs->timer_mutex);
return 0;
}
int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event)
{
if (event == CPUFREQ_GOV_POLICY_INIT) {
return cpufreq_governor_init(policy);
} else if (policy->governor_data) {
switch (event) {
case CPUFREQ_GOV_POLICY_EXIT:
return cpufreq_governor_exit(policy);
case CPUFREQ_GOV_START:
return cpufreq_governor_start(policy);
case CPUFREQ_GOV_STOP:
return cpufreq_governor_stop(policy);
case CPUFREQ_GOV_LIMITS:
return cpufreq_governor_limits(policy);
}
}
return -EINVAL;
}
EXPORT_SYMBOL_GPL(cpufreq_governor_dbs);
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_limits);
drivers/cpufreq/cpufreq_governor.h
+21 -3
View File
@@ -138,8 +138,8 @@ struct dbs_governor {
unsigned int (*gov_dbs_timer)(struct cpufreq_policy *policy);
struct policy_dbs_info *(*alloc)(void);
void (*free)(struct policy_dbs_info *policy_dbs);
int (*init)(struct dbs_data *dbs_data, bool notify);
void (*exit)(struct dbs_data *dbs_data, bool notify);
int (*init)(struct dbs_data *dbs_data);
void (*exit)(struct dbs_data *dbs_data);
void (*start)(struct cpufreq_policy *policy);
};
@@ -148,6 +148,25 @@ static inline struct dbs_governor *dbs_governor_of(struct cpufreq_policy *policy
return container_of(policy->governor, struct dbs_governor, gov);
}
/* Governor callback routines */
int cpufreq_dbs_governor_init(struct cpufreq_policy *policy);
void cpufreq_dbs_governor_exit(struct cpufreq_policy *policy);
int cpufreq_dbs_governor_start(struct cpufreq_policy *policy);
void cpufreq_dbs_governor_stop(struct cpufreq_policy *policy);
void cpufreq_dbs_governor_limits(struct cpufreq_policy *policy);
#define CPUFREQ_DBS_GOVERNOR_INITIALIZER(_name_) \
{ \
.name = _name_, \
.max_transition_latency = TRANSITION_LATENCY_LIMIT, \
.owner = THIS_MODULE, \
.init = cpufreq_dbs_governor_init, \
.exit = cpufreq_dbs_governor_exit, \
.start = cpufreq_dbs_governor_start, \
.stop = cpufreq_dbs_governor_stop, \
.limits = cpufreq_dbs_governor_limits, \
}
/* Governor specific operations */
struct od_ops {
unsigned int (*powersave_bias_target)(struct cpufreq_policy *policy,
@@ -155,7 +174,6 @@ struct od_ops {
};
unsigned int dbs_update(struct cpufreq_policy *policy);
int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event);
void od_register_powersave_bias_handler(unsigned int (*f)
(struct cpufreq_policy *, unsigned int, unsigned int),
unsigned int powersave_bias);
drivers/cpufreq/cpufreq_ondemand.c
+13 -25
View File
@@ -65,34 +65,30 @@ static unsigned int generic_powersave_bias_target(struct cpufreq_policy *policy,
{
unsigned int freq_req, freq_reduc, freq_avg;
unsigned int freq_hi, freq_lo;
unsigned int index = 0;
unsigned int index;
unsigned int delay_hi_us;
struct policy_dbs_info *policy_dbs = policy->governor_data;
struct od_policy_dbs_info *dbs_info = to_dbs_info(policy_dbs);
struct dbs_data *dbs_data = policy_dbs->dbs_data;
struct od_dbs_tuners *od_tuners = dbs_data->tuners;
struct cpufreq_frequency_table *freq_table = policy->freq_table;
if (!dbs_info->freq_table) {
if (!freq_table) {
dbs_info->freq_lo = 0;
dbs_info->freq_lo_delay_us = 0;
return freq_next;
}
cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_next,
relation, &index);
freq_req = dbs_info->freq_table[index].frequency;
index = cpufreq_frequency_table_target(policy, freq_next, relation);
freq_req = freq_table[index].frequency;
freq_reduc = freq_req * od_tuners->powersave_bias / 1000;
freq_avg = freq_req - freq_reduc;
/* Find freq bounds for freq_avg in freq_table */
index = 0;
cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_avg,
CPUFREQ_RELATION_H, &index);
freq_lo = dbs_info->freq_table[index].frequency;
index = 0;
cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_avg,
CPUFREQ_RELATION_L, &index);
freq_hi = dbs_info->freq_table[index].frequency;
index = cpufreq_table_find_index_h(policy, freq_avg);
freq_lo = freq_table[index].frequency;
index = cpufreq_table_find_index_l(policy, freq_avg);
freq_hi = freq_table[index].frequency;
/* Find out how long we have to be in hi and lo freqs */
if (freq_hi == freq_lo) {
@@ -113,7 +109,6 @@ static void ondemand_powersave_bias_init(struct cpufreq_policy *policy)
{
struct od_policy_dbs_info *dbs_info = to_dbs_info(policy->governor_data);
dbs_info->freq_table = cpufreq_frequency_get_table(policy->cpu);
dbs_info->freq_lo = 0;
}
@@ -361,17 +356,15 @@ static void od_free(struct policy_dbs_info *policy_dbs)
kfree(to_dbs_info(policy_dbs));
}
static int od_init(struct dbs_data *dbs_data, bool notify)
static int od_init(struct dbs_data *dbs_data)
{
struct od_dbs_tuners *tuners;
u64 idle_time;
int cpu;
tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
if (!tuners) {
pr_err("%s: kzalloc failed\n", __func__);
if (!tuners)
return -ENOMEM;
}
cpu = get_cpu();
idle_time = get_cpu_idle_time_us(cpu, NULL);
@@ -402,7 +395,7 @@ static int od_init(struct dbs_data *dbs_data, bool notify)
return 0;
}
static void od_exit(struct dbs_data *dbs_data, bool notify)
static void od_exit(struct dbs_data *dbs_data)
{
kfree(dbs_data->tuners);
}
@@ -420,12 +413,7 @@ static struct od_ops od_ops = {
};
static struct dbs_governor od_dbs_gov = {
.gov = {
.name = "ondemand",
.governor = cpufreq_governor_dbs,
.max_transition_latency = TRANSITION_LATENCY_LIMIT,
.owner = THIS_MODULE,
},
.gov = CPUFREQ_DBS_GOVERNOR_INITIALIZER("ondemand"),
.kobj_type = { .default_attrs = od_attributes },
.gov_dbs_timer = od_dbs_timer,
.alloc = od_alloc,

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