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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-12 13:14:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-12 13:14:19 -0700
commit19c1940feab777bb037c665a09f495d08a6c4e6c (patch)
tree68d4de31f30c9d69a1f1ea080b8a69ce61e1ead5 /include
parent7c574cf6aeb75920ba4d3af937bb1b3c42785ac4 (diff)
parentd715a226b0b3dae48865d05e8c36175a8f75a809 (diff)
downloadlinux-19c1940feab777bb037c665a09f495d08a6c4e6c.tar.bz2
Merge tag 'pm+acpi-3.16-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI and power management updates from Rafael Wysocki: "These are fixups on top of the previous PM+ACPI pull request, regression fixes (ACPI hotplug, cpufreq ppc-corenet), other bug fixes (ACPI reset, cpufreq), new PM trace points for system suspend profiling and a copyright notice update. Specifics: - I didn't remember correctly that the Hans de Goede's ACPI video patches actually didn't flip the video.use_native_backlight default, although we had discussed that and decided to do that. Since I said we would do that in the previous PM+ACPI pull request, make that change for real now. - ACPI bus check notifications for PCI host bridges don't cause the bus below the host bridge to be checked for changes as they should because of a mistake in the ACPI-based PCI hotplug (ACPIPHP) subsystem that forgets to add hotplug contexts to PCI host bridge ACPI device objects. Create hotplug contexts for PCI host bridges too as appropriate. - Revert recent cpufreq commit related to the big.LITTLE cpufreq driver that breaks arm64 builds. - Fix for a regression in the ppc-corenet cpufreq driver introduced during the 3.15 cycle and causing the driver to use the remainder from do_div instead of the quotient. From Ed Swarthout. - Resets triggered by panic activate a BUG_ON() in vmalloc.c on systems where the ACPI reset register is located in memory address space. Fix from Randy Wright. - Fix for a problem with cpufreq governors that decisions made by them may be suboptimal due to the fact that deferrable timers are used by them for CPU load sampling. From Srivatsa S Bhat. - Fix for a problem with the Tegra cpufreq driver where the CPU frequency is temporarily switched to a "stable" level that is different from both the initial and target frequencies during transitions which causes udelay() to expire earlier than it should sometimes. From Viresh Kumar. - New trace points and rework of some existing trace points for system suspend/resume profiling from Todd Brandt. - Assorted cpufreq fixes and cleanups from Stratos Karafotis and Viresh Kumar. - Copyright notice update for suspend-and-cpuhotplug.txt from Srivatsa S Bhat" * tag 'pm+acpi-3.16-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI / hotplug / PCI: Add hotplug contexts to PCI host bridges PM / sleep: trace events for device PM callbacks cpufreq: cpufreq-cpu0: remove dependency on THERMAL and REGULATOR cpufreq: tegra: update comment for clarity cpufreq: intel_pstate: Remove duplicate CPU ID check cpufreq: Mark CPU0 driver with CPUFREQ_NEED_INITIAL_FREQ_CHECK flag PM / Documentation: Update copyright in suspend-and-cpuhotplug.txt cpufreq: governor: remove copy_prev_load from 'struct cpu_dbs_common_info' cpufreq: governor: Be friendly towards latency-sensitive bursty workloads PM / sleep: trace events for suspend/resume cpufreq: ppc-corenet-cpu-freq: do_div use quotient Revert "cpufreq: Enable big.LITTLE cpufreq driver on arm64" cpufreq: Tegra: implement intermediate frequency callbacks cpufreq: add support for intermediate (stable) frequencies ACPI / video: Change the default for video.use_native_backlight to 1 ACPI: Fix bug when ACPI reset register is implemented in system memory
Diffstat (limited to 'include')
-rw-r--r--include/linux/cpufreq.h25
-rw-r--r--include/trace/events/power.h84
2 files changed, 83 insertions, 26 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 3f458896d45c..ec4112d257bc 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -75,6 +75,7 @@ struct cpufreq_policy {
unsigned int max; /* in kHz */
unsigned int cur; /* in kHz, only needed if cpufreq
* governors are used */
+ unsigned int restore_freq; /* = policy->cur before transition */
unsigned int suspend_freq; /* freq to set during suspend */
unsigned int policy; /* see above */
@@ -221,11 +222,35 @@ struct cpufreq_driver {
/* define one out of two */
int (*setpolicy) (struct cpufreq_policy *policy);
+
+ /*
+ * On failure, should always restore frequency to policy->restore_freq
+ * (i.e. old freq).
+ */
int (*target) (struct cpufreq_policy *policy, /* Deprecated */
unsigned int target_freq,
unsigned int relation);
int (*target_index) (struct cpufreq_policy *policy,
unsigned int index);
+ /*
+ * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION
+ * unset.
+ *
+ * get_intermediate should return a stable intermediate frequency
+ * platform wants to switch to and target_intermediate() should set CPU
+ * to to that frequency, before jumping to the frequency corresponding
+ * to 'index'. Core will take care of sending notifications and driver
+ * doesn't have to handle them in target_intermediate() or
+ * target_index().
+ *
+ * Drivers can return '0' from get_intermediate() in case they don't
+ * wish to switch to intermediate frequency for some target frequency.
+ * In that case core will directly call ->target_index().
+ */
+ unsigned int (*get_intermediate)(struct cpufreq_policy *policy,
+ unsigned int index);
+ int (*target_intermediate)(struct cpufreq_policy *policy,
+ unsigned int index);
/* should be defined, if possible */
unsigned int (*get) (unsigned int cpu);
diff --git a/include/trace/events/power.h b/include/trace/events/power.h
index 9a7e08d61258..d19840b0cac8 100644
--- a/include/trace/events/power.h
+++ b/include/trace/events/power.h
@@ -7,6 +7,9 @@
#include <linux/ktime.h>
#include <linux/pm_qos.h>
#include <linux/tracepoint.h>
+#include <linux/ftrace_event.h>
+
+#define TPS(x) tracepoint_string(x)
DECLARE_EVENT_CLASS(cpu,
@@ -90,6 +93,17 @@ TRACE_EVENT(pstate_sample,
#define PWR_EVENT_EXIT -1
#endif
+#define pm_verb_symbolic(event) \
+ __print_symbolic(event, \
+ { PM_EVENT_SUSPEND, "suspend" }, \
+ { PM_EVENT_RESUME, "resume" }, \
+ { PM_EVENT_FREEZE, "freeze" }, \
+ { PM_EVENT_QUIESCE, "quiesce" }, \
+ { PM_EVENT_HIBERNATE, "hibernate" }, \
+ { PM_EVENT_THAW, "thaw" }, \
+ { PM_EVENT_RESTORE, "restore" }, \
+ { PM_EVENT_RECOVER, "recover" })
+
DEFINE_EVENT(cpu, cpu_frequency,
TP_PROTO(unsigned int frequency, unsigned int cpu_id),
@@ -97,58 +111,76 @@ DEFINE_EVENT(cpu, cpu_frequency,
TP_ARGS(frequency, cpu_id)
);
-TRACE_EVENT(machine_suspend,
+TRACE_EVENT(device_pm_callback_start,
- TP_PROTO(unsigned int state),
+ TP_PROTO(struct device *dev, const char *pm_ops, int event),
- TP_ARGS(state),
+ TP_ARGS(dev, pm_ops, event),
TP_STRUCT__entry(
- __field( u32, state )
+ __string(device, dev_name(dev))
+ __string(driver, dev_driver_string(dev))
+ __string(parent, dev->parent ? dev_name(dev->parent) : "none")
+ __string(pm_ops, pm_ops ? pm_ops : "none ")
+ __field(int, event)
),
TP_fast_assign(
- __entry->state = state;
+ __assign_str(device, dev_name(dev));
+ __assign_str(driver, dev_driver_string(dev));
+ __assign_str(parent,
+ dev->parent ? dev_name(dev->parent) : "none");
+ __assign_str(pm_ops, pm_ops ? pm_ops : "none ");
+ __entry->event = event;
),
- TP_printk("state=%lu", (unsigned long)__entry->state)
+ TP_printk("%s %s, parent: %s, %s[%s]", __get_str(driver),
+ __get_str(device), __get_str(parent), __get_str(pm_ops),
+ pm_verb_symbolic(__entry->event))
);
-TRACE_EVENT(device_pm_report_time,
+TRACE_EVENT(device_pm_callback_end,
- TP_PROTO(struct device *dev, const char *pm_ops, s64 ops_time,
- char *pm_event_str, int error),
+ TP_PROTO(struct device *dev, int error),
- TP_ARGS(dev, pm_ops, ops_time, pm_event_str, error),
+ TP_ARGS(dev, error),
TP_STRUCT__entry(
__string(device, dev_name(dev))
__string(driver, dev_driver_string(dev))
- __string(parent, dev->parent ? dev_name(dev->parent) : "none")
- __string(pm_ops, pm_ops ? pm_ops : "none ")
- __string(pm_event_str, pm_event_str)
- __field(s64, ops_time)
__field(int, error)
),
TP_fast_assign(
- const char *tmp = dev->parent ? dev_name(dev->parent) : "none";
- const char *tmp_i = pm_ops ? pm_ops : "none ";
-
__assign_str(device, dev_name(dev));
__assign_str(driver, dev_driver_string(dev));
- __assign_str(parent, tmp);
- __assign_str(pm_ops, tmp_i);
- __assign_str(pm_event_str, pm_event_str);
- __entry->ops_time = ops_time;
__entry->error = error;
),
- /* ops_str has an extra space at the end */
- TP_printk("%s %s parent=%s state=%s ops=%snsecs=%lld err=%d",
- __get_str(driver), __get_str(device), __get_str(parent),
- __get_str(pm_event_str), __get_str(pm_ops),
- __entry->ops_time, __entry->error)
+ TP_printk("%s %s, err=%d",
+ __get_str(driver), __get_str(device), __entry->error)
+);
+
+TRACE_EVENT(suspend_resume,
+
+ TP_PROTO(const char *action, int val, bool start),
+
+ TP_ARGS(action, val, start),
+
+ TP_STRUCT__entry(
+ __field(const char *, action)
+ __field(int, val)
+ __field(bool, start)
+ ),
+
+ TP_fast_assign(
+ __entry->action = action;
+ __entry->val = val;
+ __entry->start = start;
+ ),
+
+ TP_printk("%s[%u] %s", __entry->action, (unsigned int)__entry->val,
+ (__entry->start)?"begin":"end")
);
DECLARE_EVENT_CLASS(wakeup_source,