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Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r--drivers/acpi/processor_idle.c124
1 files changed, 32 insertions, 92 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 7bc22a471fe3..4e6e758bd397 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -64,7 +64,6 @@
#define _COMPONENT ACPI_PROCESSOR_COMPONENT
ACPI_MODULE_NAME("processor_idle");
#define ACPI_PROCESSOR_FILE_POWER "power"
-#define US_TO_PM_TIMER_TICKS(t) ((t * (PM_TIMER_FREQUENCY/1000)) / 1000)
#define PM_TIMER_TICK_NS (1000000000ULL/PM_TIMER_FREQUENCY)
#define C2_OVERHEAD 1 /* 1us */
#define C3_OVERHEAD 1 /* 1us */
@@ -78,6 +77,10 @@ module_param(nocst, uint, 0000);
static unsigned int latency_factor __read_mostly = 2;
module_param(latency_factor, uint, 0644);
+static s64 us_to_pm_timer_ticks(s64 t)
+{
+ return div64_u64(t * PM_TIMER_FREQUENCY, 1000000);
+}
/*
* IBM ThinkPad R40e crashes mysteriously when going into C2 or C3.
* For now disable this. Probably a bug somewhere else.
@@ -101,57 +104,6 @@ static int set_max_cstate(const struct dmi_system_id *id)
/* Actually this shouldn't be __cpuinitdata, would be better to fix the
callers to only run once -AK */
static struct dmi_system_id __cpuinitdata processor_power_dmi_table[] = {
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET70WW")}, (void *)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET60WW")}, (void *)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET43WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET45WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET47WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET50WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET52WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET55WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET56WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET59WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET60WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET61WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET62WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET64WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET65WW") }, (void*)1},
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET68WW") }, (void*)1},
- { set_max_cstate, "Medion 41700", {
- DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"),
- DMI_MATCH(DMI_BIOS_VERSION,"R01-A1J")}, (void *)1},
{ set_max_cstate, "Clevo 5600D", {
DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"),
DMI_MATCH(DMI_BIOS_VERSION,"SHE845M0.86C.0013.D.0302131307")},
@@ -159,25 +111,6 @@ static struct dmi_system_id __cpuinitdata processor_power_dmi_table[] = {
{},
};
-static inline u32 ticks_elapsed(u32 t1, u32 t2)
-{
- if (t2 >= t1)
- return (t2 - t1);
- else if (!(acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER))
- return (((0x00FFFFFF - t1) + t2) & 0x00FFFFFF);
- else
- return ((0xFFFFFFFF - t1) + t2);
-}
-
-static inline u32 ticks_elapsed_in_us(u32 t1, u32 t2)
-{
- if (t2 >= t1)
- return PM_TIMER_TICKS_TO_US(t2 - t1);
- else if (!(acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER))
- return PM_TIMER_TICKS_TO_US(((0x00FFFFFF - t1) + t2) & 0x00FFFFFF);
- else
- return PM_TIMER_TICKS_TO_US((0xFFFFFFFF - t1) + t2);
-}
/*
* Callers should disable interrupts before the call and enable
@@ -630,7 +563,7 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
* In either case, the proper way to
* handle BM_RLD is to set it and leave it set.
*/
- acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 1);
+ acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, 1);
return;
}
@@ -800,9 +733,9 @@ static int acpi_idle_bm_check(void)
{
u32 bm_status = 0;
- acpi_get_register_unlocked(ACPI_BITREG_BUS_MASTER_STATUS, &bm_status);
+ acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_STATUS, &bm_status);
if (bm_status)
- acpi_set_register(ACPI_BITREG_BUS_MASTER_STATUS, 1);
+ acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_STATUS, 1);
/*
* PIIX4 Erratum #18: Note that BM_STS doesn't always reflect
* the true state of bus mastering activity; forcing us to
@@ -853,7 +786,8 @@ static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx)
static int acpi_idle_enter_c1(struct cpuidle_device *dev,
struct cpuidle_state *state)
{
- u32 t1, t2;
+ ktime_t kt1, kt2;
+ s64 idle_time;
struct acpi_processor *pr;
struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
@@ -871,14 +805,15 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
return 0;
}
- t1 = inl(acpi_gbl_FADT.xpm_timer_block.address);
+ kt1 = ktime_get_real();
acpi_idle_do_entry(cx);
- t2 = inl(acpi_gbl_FADT.xpm_timer_block.address);
+ kt2 = ktime_get_real();
+ idle_time = ktime_to_us(ktime_sub(kt2, kt1));
local_irq_enable();
cx->usage++;
- return ticks_elapsed_in_us(t1, t2);
+ return idle_time;
}
/**
@@ -891,8 +826,9 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
{
struct acpi_processor *pr;
struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
- u32 t1, t2;
- int sleep_ticks = 0;
+ ktime_t kt1, kt2;
+ s64 idle_time;
+ s64 sleep_ticks = 0;
pr = __get_cpu_var(processors);
@@ -925,18 +861,19 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
if (cx->type == ACPI_STATE_C3)
ACPI_FLUSH_CPU_CACHE();
- t1 = inl(acpi_gbl_FADT.xpm_timer_block.address);
+ kt1 = ktime_get_real();
/* Tell the scheduler that we are going deep-idle: */
sched_clock_idle_sleep_event();
acpi_idle_do_entry(cx);
- t2 = inl(acpi_gbl_FADT.xpm_timer_block.address);
+ kt2 = ktime_get_real();
+ idle_time = ktime_to_us(ktime_sub(kt2, kt1));
#if defined (CONFIG_GENERIC_TIME) && defined (CONFIG_X86)
/* TSC could halt in idle, so notify users */
if (tsc_halts_in_c(cx->type))
mark_tsc_unstable("TSC halts in idle");;
#endif
- sleep_ticks = ticks_elapsed(t1, t2);
+ sleep_ticks = us_to_pm_timer_ticks(idle_time);
/* Tell the scheduler how much we idled: */
sched_clock_idle_wakeup_event(sleep_ticks*PM_TIMER_TICK_NS);
@@ -948,7 +885,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
acpi_state_timer_broadcast(pr, cx, 0);
cx->time += sleep_ticks;
- return ticks_elapsed_in_us(t1, t2);
+ return idle_time;
}
static int c3_cpu_count;
@@ -966,8 +903,10 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
{
struct acpi_processor *pr;
struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
- u32 t1, t2;
- int sleep_ticks = 0;
+ ktime_t kt1, kt2;
+ s64 idle_time;
+ s64 sleep_ticks = 0;
+
pr = __get_cpu_var(processors);
@@ -1028,20 +967,21 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
c3_cpu_count++;
/* Disable bus master arbitration when all CPUs are in C3 */
if (c3_cpu_count == num_online_cpus())
- acpi_set_register(ACPI_BITREG_ARB_DISABLE, 1);
+ acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 1);
spin_unlock(&c3_lock);
} else if (!pr->flags.bm_check) {
ACPI_FLUSH_CPU_CACHE();
}
- t1 = inl(acpi_gbl_FADT.xpm_timer_block.address);
+ kt1 = ktime_get_real();
acpi_idle_do_entry(cx);
- t2 = inl(acpi_gbl_FADT.xpm_timer_block.address);
+ kt2 = ktime_get_real();
+ idle_time = ktime_to_us(ktime_sub(kt2, kt1));
/* Re-enable bus master arbitration */
if (pr->flags.bm_check && pr->flags.bm_control) {
spin_lock(&c3_lock);
- acpi_set_register(ACPI_BITREG_ARB_DISABLE, 0);
+ acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0);
c3_cpu_count--;
spin_unlock(&c3_lock);
}
@@ -1051,7 +991,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
if (tsc_halts_in_c(ACPI_STATE_C3))
mark_tsc_unstable("TSC halts in idle");
#endif
- sleep_ticks = ticks_elapsed(t1, t2);
+ sleep_ticks = us_to_pm_timer_ticks(idle_time);
/* Tell the scheduler how much we idled: */
sched_clock_idle_wakeup_event(sleep_ticks*PM_TIMER_TICK_NS);
@@ -1062,7 +1002,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
acpi_state_timer_broadcast(pr, cx, 0);
cx->time += sleep_ticks;
- return ticks_elapsed_in_us(t1, t2);
+ return idle_time;
}
struct cpuidle_driver acpi_idle_driver = {
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-19 19:53:51 +0000