diff options
Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r-- | drivers/acpi/processor_idle.c | 124 |
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 = { |