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path: root/drivers/acpi/processor_idle.c
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Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r--drivers/acpi/processor_idle.c315
1 files changed, 159 insertions, 156 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 2c04740c6543..26a3a4016115 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -48,15 +48,12 @@
#define ACPI_PROCESSOR_CLASS "processor"
#define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver"
#define _COMPONENT ACPI_PROCESSOR_COMPONENT
-ACPI_MODULE_NAME ("acpi_processor")
-
+ACPI_MODULE_NAME("acpi_processor")
#define ACPI_PROCESSOR_FILE_POWER "power"
-
#define US_TO_PM_TIMER_TICKS(t) ((t * (PM_TIMER_FREQUENCY/1000)) / 1000)
#define C2_OVERHEAD 4 /* 1us (3.579 ticks per us) */
#define C3_OVERHEAD 4 /* 1us (3.579 ticks per us) */
-
-static void (*pm_idle_save)(void);
+static void (*pm_idle_save) (void);
module_param(max_cstate, uint, 0644);
static unsigned int nocst = 0;
@@ -69,7 +66,8 @@ module_param(nocst, uint, 0000);
* 100 HZ: 0x0000000F: 4 jiffies = 40ms
* reduce history for more aggressive entry into C3
*/
-static unsigned int bm_history = (HZ >= 800 ? 0xFFFFFFFF : ((1U << (HZ / 25)) - 1));
+static unsigned int bm_history =
+ (HZ >= 800 ? 0xFFFFFFFF : ((1U << (HZ / 25)) - 1));
module_param(bm_history, uint, 0644);
/* --------------------------------------------------------------------------
Power Management
@@ -87,34 +85,36 @@ static int set_max_cstate(struct dmi_system_id *id)
return 0;
printk(KERN_NOTICE PREFIX "%s detected - limiting to C%ld max_cstate."
- " Override with \"processor.max_cstate=%d\"\n", id->ident,
- (long)id->driver_data, ACPI_PROCESSOR_MAX_POWER + 1);
+ " Override with \"processor.max_cstate=%d\"\n", id->ident,
+ (long)id->driver_data, ACPI_PROCESSOR_MAX_POWER + 1);
max_cstate = (long)id->driver_data;
return 0;
}
-
static struct dmi_system_id __initdata processor_power_dmi_table[] = {
- { set_max_cstate, "IBM ThinkPad R40e", {
- DMI_MATCH(DMI_BIOS_VENDOR,"IBM"),
- DMI_MATCH(DMI_BIOS_VERSION,"1SET60WW") }, (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") },
- (void*)2},
+ {set_max_cstate, "IBM ThinkPad R40e", {
+ DMI_MATCH(DMI_BIOS_VENDOR,
+ "IBM"),
+ DMI_MATCH(DMI_BIOS_VERSION,
+ "1SET60WW")},
+ (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")},
+ (void *)2},
{},
};
-
-static inline u32
-ticks_elapsed (
- u32 t1,
- u32 t2)
+static inline u32 ticks_elapsed(u32 t1, u32 t2)
{
if (t2 >= t1)
return (t2 - t1);
@@ -124,13 +124,11 @@ ticks_elapsed (
return ((0xFFFFFFFF - t1) + t2);
}
-
static void
-acpi_processor_power_activate (
- struct acpi_processor *pr,
- struct acpi_processor_cx *new)
+acpi_processor_power_activate(struct acpi_processor *pr,
+ struct acpi_processor_cx *new)
{
- struct acpi_processor_cx *old;
+ struct acpi_processor_cx *old;
if (!pr || !new)
return;
@@ -139,7 +137,7 @@ acpi_processor_power_activate (
if (old)
old->promotion.count = 0;
- new->demotion.count = 0;
+ new->demotion.count = 0;
/* Cleanup from old state. */
if (old) {
@@ -147,7 +145,8 @@ acpi_processor_power_activate (
case ACPI_STATE_C3:
/* Disable bus master reload */
if (new->type != ACPI_STATE_C3 && pr->flags.bm_check)
- acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 0, ACPI_MTX_DO_NOT_LOCK);
+ acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 0,
+ ACPI_MTX_DO_NOT_LOCK);
break;
}
}
@@ -157,7 +156,8 @@ acpi_processor_power_activate (
case ACPI_STATE_C3:
/* Enable bus master reload */
if (old->type != ACPI_STATE_C3 && pr->flags.bm_check)
- acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 1, ACPI_MTX_DO_NOT_LOCK);
+ acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 1,
+ ACPI_MTX_DO_NOT_LOCK);
break;
}
@@ -166,17 +166,15 @@ acpi_processor_power_activate (
return;
}
+static atomic_t c3_cpu_count;
-static atomic_t c3_cpu_count;
-
-
-static void acpi_processor_idle (void)
+static void acpi_processor_idle(void)
{
- struct acpi_processor *pr = NULL;
+ struct acpi_processor *pr = NULL;
struct acpi_processor_cx *cx = NULL;
struct acpi_processor_cx *next_state = NULL;
- int sleep_ticks = 0;
- u32 t1, t2 = 0;
+ int sleep_ticks = 0;
+ u32 t1, t2 = 0;
pr = processors[raw_smp_processor_id()];
if (!pr)
@@ -208,8 +206,8 @@ static void acpi_processor_idle (void)
* for demotion.
*/
if (pr->flags.bm_check) {
- u32 bm_status = 0;
- unsigned long diff = jiffies - pr->power.bm_check_timestamp;
+ u32 bm_status = 0;
+ unsigned long diff = jiffies - pr->power.bm_check_timestamp;
if (diff > 32)
diff = 32;
@@ -223,11 +221,11 @@ static void acpi_processor_idle (void)
}
acpi_get_register(ACPI_BITREG_BUS_MASTER_STATUS,
- &bm_status, ACPI_MTX_DO_NOT_LOCK);
+ &bm_status, ACPI_MTX_DO_NOT_LOCK);
if (bm_status) {
pr->power.bm_activity++;
acpi_set_register(ACPI_BITREG_BUS_MASTER_STATUS,
- 1, ACPI_MTX_DO_NOT_LOCK);
+ 1, ACPI_MTX_DO_NOT_LOCK);
}
/*
* PIIX4 Erratum #18: Note that BM_STS doesn't always reflect
@@ -236,7 +234,7 @@ static void acpi_processor_idle (void)
*/
else if (errata.piix4.bmisx) {
if ((inb_p(errata.piix4.bmisx + 0x02) & 0x01)
- || (inb_p(errata.piix4.bmisx + 0x0A) & 0x01))
+ || (inb_p(errata.piix4.bmisx + 0x0A) & 0x01))
pr->power.bm_activity++;
}
@@ -281,7 +279,7 @@ static void acpi_processor_idle (void)
else
safe_halt();
/*
- * TBD: Can't get time duration while in C1, as resumes
+ * TBD: Can't get time duration while in C1, as resumes
* go to an ISR rather than here. Need to instrument
* base interrupt handler.
*/
@@ -300,26 +298,27 @@ static void acpi_processor_idle (void)
/* Re-enable interrupts */
local_irq_enable();
/* Compute time (ticks) that we were actually asleep */
- sleep_ticks = ticks_elapsed(t1, t2) - cx->latency_ticks - C2_OVERHEAD;
+ sleep_ticks =
+ ticks_elapsed(t1, t2) - cx->latency_ticks - C2_OVERHEAD;
break;
case ACPI_STATE_C3:
-
+
if (pr->flags.bm_check) {
if (atomic_inc_return(&c3_cpu_count) ==
- num_online_cpus()) {
+ num_online_cpus()) {
/*
* All CPUs are trying to go to C3
* Disable bus master arbitration
*/
acpi_set_register(ACPI_BITREG_ARB_DISABLE, 1,
- ACPI_MTX_DO_NOT_LOCK);
+ ACPI_MTX_DO_NOT_LOCK);
}
} else {
/* SMP with no shared cache... Invalidate cache */
ACPI_FLUSH_CPU_CACHE();
}
-
+
/* Get start time (ticks) */
t1 = inl(acpi_fadt.xpm_tmr_blk.address);
/* Invoke C3 */
@@ -331,13 +330,15 @@ static void acpi_processor_idle (void)
if (pr->flags.bm_check) {
/* Enable bus master arbitration */
atomic_dec(&c3_cpu_count);
- acpi_set_register(ACPI_BITREG_ARB_DISABLE, 0, ACPI_MTX_DO_NOT_LOCK);
+ acpi_set_register(ACPI_BITREG_ARB_DISABLE, 0,
+ ACPI_MTX_DO_NOT_LOCK);
}
/* Re-enable interrupts */
local_irq_enable();
/* Compute time (ticks) that we were actually asleep */
- sleep_ticks = ticks_elapsed(t1, t2) - cx->latency_ticks - C3_OVERHEAD;
+ sleep_ticks =
+ ticks_elapsed(t1, t2) - cx->latency_ticks - C3_OVERHEAD;
break;
default:
@@ -359,15 +360,18 @@ static void acpi_processor_idle (void)
((cx->promotion.state - pr->power.states) <= max_cstate)) {
if (sleep_ticks > cx->promotion.threshold.ticks) {
cx->promotion.count++;
- cx->demotion.count = 0;
- if (cx->promotion.count >= cx->promotion.threshold.count) {
+ cx->demotion.count = 0;
+ if (cx->promotion.count >=
+ cx->promotion.threshold.count) {
if (pr->flags.bm_check) {
- if (!(pr->power.bm_activity & cx->promotion.threshold.bm)) {
- next_state = cx->promotion.state;
+ if (!
+ (pr->power.bm_activity & cx->
+ promotion.threshold.bm)) {
+ next_state =
+ cx->promotion.state;
goto end;
}
- }
- else {
+ } else {
next_state = cx->promotion.state;
goto end;
}
@@ -392,7 +396,7 @@ static void acpi_processor_idle (void)
}
}
-end:
+ end:
/*
* Demote if current state exceeds max_cstate
*/
@@ -412,7 +416,7 @@ end:
return;
- easy_out:
+ easy_out:
/* do C1 instead of busy loop */
if (pm_idle_save)
pm_idle_save();
@@ -421,10 +425,7 @@ end:
return;
}
-
-static int
-acpi_processor_set_power_policy (
- struct acpi_processor *pr)
+static int acpi_processor_set_power_policy(struct acpi_processor *pr)
{
unsigned int i;
unsigned int state_is_set = 0;
@@ -432,7 +433,7 @@ acpi_processor_set_power_policy (
struct acpi_processor_cx *higher = NULL;
struct acpi_processor_cx *cx;
- ACPI_FUNCTION_TRACE("acpi_processor_set_power_policy");
+ ACPI_FUNCTION_TRACE("acpi_processor_set_power_policy");
if (!pr)
return_VALUE(-EINVAL);
@@ -447,7 +448,7 @@ acpi_processor_set_power_policy (
*/
/* startup state */
- for (i=1; i < ACPI_PROCESSOR_MAX_POWER; i++) {
+ for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) {
cx = &pr->power.states[i];
if (!cx->valid)
continue;
@@ -456,13 +457,13 @@ acpi_processor_set_power_policy (
pr->power.state = cx;
state_is_set++;
break;
- }
+ }
if (!state_is_set)
return_VALUE(-ENODEV);
/* demotion */
- for (i=1; i < ACPI_PROCESSOR_MAX_POWER; i++) {
+ for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) {
cx = &pr->power.states[i];
if (!cx->valid)
continue;
@@ -485,7 +486,7 @@ acpi_processor_set_power_policy (
continue;
if (higher) {
- cx->promotion.state = higher;
+ cx->promotion.state = higher;
cx->promotion.threshold.ticks = cx->latency_ticks;
if (cx->type >= ACPI_STATE_C2)
cx->promotion.threshold.count = 4;
@@ -498,11 +499,10 @@ acpi_processor_set_power_policy (
higher = cx;
}
- return_VALUE(0);
+ return_VALUE(0);
}
-
-static int acpi_processor_get_power_info_fadt (struct acpi_processor *pr)
+static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr)
{
int i;
@@ -543,15 +543,14 @@ static int acpi_processor_get_power_info_fadt (struct acpi_processor *pr)
return_VALUE(0);
}
-
-static int acpi_processor_get_power_info_default_c1 (struct acpi_processor *pr)
+static int acpi_processor_get_power_info_default_c1(struct acpi_processor *pr)
{
int i;
ACPI_FUNCTION_TRACE("acpi_processor_get_power_info_default_c1");
for (i = 0; i < ACPI_PROCESSOR_MAX_POWER; i++)
- memset(&(pr->power.states[i]), 0,
+ memset(&(pr->power.states[i]), 0,
sizeof(struct acpi_processor_cx));
/* if info is obtained from pblk/fadt, type equals state */
@@ -567,14 +566,13 @@ static int acpi_processor_get_power_info_default_c1 (struct acpi_processor *pr)
return_VALUE(0);
}
-
-static int acpi_processor_get_power_info_cst (struct acpi_processor *pr)
+static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
{
- acpi_status status = 0;
- acpi_integer count;
- int i;
- struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
- union acpi_object *cst;
+ acpi_status status = 0;
+ acpi_integer count;
+ int i;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *cst;
ACPI_FUNCTION_TRACE("acpi_processor_get_power_info_cst");
@@ -583,20 +581,21 @@ static int acpi_processor_get_power_info_cst (struct acpi_processor *pr)
pr->power.count = 0;
for (i = 0; i < ACPI_PROCESSOR_MAX_POWER; i++)
- memset(&(pr->power.states[i]), 0,
+ memset(&(pr->power.states[i]), 0,
sizeof(struct acpi_processor_cx));
status = acpi_evaluate_object(pr->handle, "_CST", NULL, &buffer);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No _CST, giving up\n"));
return_VALUE(-ENODEV);
- }
+ }
- cst = (union acpi_object *) buffer.pointer;
+ cst = (union acpi_object *)buffer.pointer;
/* There must be at least 2 elements */
if (!cst || (cst->type != ACPI_TYPE_PACKAGE) || cst->package.count < 2) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "not enough elements in _CST\n"));
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "not enough elements in _CST\n"));
status = -EFAULT;
goto end;
}
@@ -605,15 +604,19 @@ static int acpi_processor_get_power_info_cst (struct acpi_processor *pr)
/* Validate number of power states. */
if (count < 1 || count != cst->package.count - 1) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "count given by _CST is not valid\n"));
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "count given by _CST is not valid\n"));
status = -EFAULT;
goto end;
}
/* We support up to ACPI_PROCESSOR_MAX_POWER. */
if (count > ACPI_PROCESSOR_MAX_POWER) {
- printk(KERN_WARNING "Limiting number of power states to max (%d)\n", ACPI_PROCESSOR_MAX_POWER);
- printk(KERN_WARNING "Please increase ACPI_PROCESSOR_MAX_POWER if needed.\n");
+ printk(KERN_WARNING
+ "Limiting number of power states to max (%d)\n",
+ ACPI_PROCESSOR_MAX_POWER);
+ printk(KERN_WARNING
+ "Please increase ACPI_PROCESSOR_MAX_POWER if needed.\n");
count = ACPI_PROCESSOR_MAX_POWER;
}
@@ -628,29 +631,29 @@ static int acpi_processor_get_power_info_cst (struct acpi_processor *pr)
memset(&cx, 0, sizeof(cx));
- element = (union acpi_object *) &(cst->package.elements[i]);
+ element = (union acpi_object *)&(cst->package.elements[i]);
if (element->type != ACPI_TYPE_PACKAGE)
continue;
if (element->package.count != 4)
continue;
- obj = (union acpi_object *) &(element->package.elements[0]);
+ obj = (union acpi_object *)&(element->package.elements[0]);
if (obj->type != ACPI_TYPE_BUFFER)
continue;
- reg = (struct acpi_power_register *) obj->buffer.pointer;
+ reg = (struct acpi_power_register *)obj->buffer.pointer;
if (reg->space_id != ACPI_ADR_SPACE_SYSTEM_IO &&
- (reg->space_id != ACPI_ADR_SPACE_FIXED_HARDWARE))
+ (reg->space_id != ACPI_ADR_SPACE_FIXED_HARDWARE))
continue;
cx.address = (reg->space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) ?
- 0 : reg->address;
+ 0 : reg->address;
/* There should be an easy way to extract an integer... */
- obj = (union acpi_object *) &(element->package.elements[1]);
+ obj = (union acpi_object *)&(element->package.elements[1]);
if (obj->type != ACPI_TYPE_INTEGER)
continue;
@@ -660,17 +663,16 @@ static int acpi_processor_get_power_info_cst (struct acpi_processor *pr)
(reg->space_id != ACPI_ADR_SPACE_SYSTEM_IO))
continue;
- if ((cx.type < ACPI_STATE_C1) ||
- (cx.type > ACPI_STATE_C3))
+ if ((cx.type < ACPI_STATE_C1) || (cx.type > ACPI_STATE_C3))
continue;
- obj = (union acpi_object *) &(element->package.elements[2]);
+ obj = (union acpi_object *)&(element->package.elements[2]);
if (obj->type != ACPI_TYPE_INTEGER)
continue;
cx.latency = obj->integer.value;
- obj = (union acpi_object *) &(element->package.elements[3]);
+ obj = (union acpi_object *)&(element->package.elements[3]);
if (obj->type != ACPI_TYPE_INTEGER)
continue;
@@ -680,19 +682,19 @@ static int acpi_processor_get_power_info_cst (struct acpi_processor *pr)
memcpy(&(pr->power.states[pr->power.count]), &cx, sizeof(cx));
}
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d power states\n", pr->power.count));
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d power states\n",
+ pr->power.count));
/* Validate number of power states discovered */
if (pr->power.count < 2)
status = -ENODEV;
-end:
+ end:
acpi_os_free(buffer.pointer);
return_VALUE(status);
}
-
static void acpi_processor_power_verify_c2(struct acpi_processor_cx *cx)
{
ACPI_FUNCTION_TRACE("acpi_processor_get_power_verify_c2");
@@ -706,8 +708,7 @@ static void acpi_processor_power_verify_c2(struct acpi_processor_cx *cx)
*/
else if (cx->latency > ACPI_PROCESSOR_MAX_C2_LATENCY) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "latency too large [%d]\n",
- cx->latency));
+ "latency too large [%d]\n", cx->latency));
return_VOID;
}
@@ -721,10 +722,8 @@ static void acpi_processor_power_verify_c2(struct acpi_processor_cx *cx)
return_VOID;
}
-
-static void acpi_processor_power_verify_c3(
- struct acpi_processor *pr,
- struct acpi_processor_cx *cx)
+static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
+ struct acpi_processor_cx *cx)
{
static int bm_check_flag;
@@ -739,8 +738,7 @@ static void acpi_processor_power_verify_c3(
*/
else if (cx->latency > ACPI_PROCESSOR_MAX_C3_LATENCY) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "latency too large [%d]\n",
- cx->latency));
+ "latency too large [%d]\n", cx->latency));
return_VOID;
}
@@ -753,7 +751,7 @@ static void acpi_processor_power_verify_c3(
*/
else if (errata.piix4.fdma) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "C3 not supported on PIIX4 with Type-F DMA\n"));
+ "C3 not supported on PIIX4 with Type-F DMA\n"));
return_VOID;
}
@@ -770,7 +768,7 @@ static void acpi_processor_power_verify_c3(
/* bus mastering control is necessary */
if (!pr->flags.bm_control) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "C3 support requires bus mastering control\n"));
+ "C3 support requires bus mastering control\n"));
return_VOID;
}
} else {
@@ -780,12 +778,12 @@ static void acpi_processor_power_verify_c3(
*/
if (acpi_fadt.wb_invd != 1) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Cache invalidation should work properly"
- " for C3 to be enabled on SMP systems\n"));
+ "Cache invalidation should work properly"
+ " for C3 to be enabled on SMP systems\n"));
return_VOID;
}
acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD,
- 0, ACPI_MTX_DO_NOT_LOCK);
+ 0, ACPI_MTX_DO_NOT_LOCK);
}
/*
@@ -800,13 +798,12 @@ static void acpi_processor_power_verify_c3(
return_VOID;
}
-
static int acpi_processor_power_verify(struct acpi_processor *pr)
{
unsigned int i;
unsigned int working = 0;
- for (i=1; i < ACPI_PROCESSOR_MAX_POWER; i++) {
+ for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) {
struct acpi_processor_cx *cx = &pr->power.states[i];
switch (cx->type) {
@@ -830,8 +827,7 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
return (working);
}
-static int acpi_processor_get_power_info (
- struct acpi_processor *pr)
+static int acpi_processor_get_power_info(struct acpi_processor *pr)
{
unsigned int i;
int result;
@@ -874,16 +870,16 @@ static int acpi_processor_get_power_info (
return_VALUE(0);
}
-int acpi_processor_cst_has_changed (struct acpi_processor *pr)
+int acpi_processor_cst_has_changed(struct acpi_processor *pr)
{
- int result = 0;
+ int result = 0;
ACPI_FUNCTION_TRACE("acpi_processor_cst_has_changed");
if (!pr)
- return_VALUE(-EINVAL);
+ return_VALUE(-EINVAL);
- if ( nocst) {
+ if (nocst) {
return_VALUE(-ENODEV);
}
@@ -892,7 +888,7 @@ int acpi_processor_cst_has_changed (struct acpi_processor *pr)
/* Fall back to the default idle loop */
pm_idle = pm_idle_save;
- synchronize_sched(); /* Relies on interrupts forcing exit from idle. */
+ synchronize_sched(); /* Relies on interrupts forcing exit from idle. */
pr->flags.power = 0;
result = acpi_processor_get_power_info(pr);
@@ -906,8 +902,8 @@ int acpi_processor_cst_has_changed (struct acpi_processor *pr)
static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_processor *pr = (struct acpi_processor *)seq->private;
- unsigned int i;
+ struct acpi_processor *pr = (struct acpi_processor *)seq->private;
+ unsigned int i;
ACPI_FUNCTION_TRACE("acpi_processor_power_seq_show");
@@ -915,17 +911,17 @@ static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset)
goto end;
seq_printf(seq, "active state: C%zd\n"
- "max_cstate: C%d\n"
- "bus master activity: %08x\n",
- pr->power.state ? pr->power.state - pr->power.states : 0,
- max_cstate,
- (unsigned)pr->power.bm_activity);
+ "max_cstate: C%d\n"
+ "bus master activity: %08x\n",
+ pr->power.state ? pr->power.state - pr->power.states : 0,
+ max_cstate, (unsigned)pr->power.bm_activity);
seq_puts(seq, "states:\n");
for (i = 1; i <= pr->power.count; i++) {
seq_printf(seq, " %cC%d: ",
- (&pr->power.states[i] == pr->power.state?'*':' '), i);
+ (&pr->power.states[i] ==
+ pr->power.state ? '*' : ' '), i);
if (!pr->power.states[i].valid) {
seq_puts(seq, "<not supported>\n");
@@ -949,45 +945,46 @@ static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset)
if (pr->power.states[i].promotion.state)
seq_printf(seq, "promotion[C%zd] ",
- (pr->power.states[i].promotion.state -
- pr->power.states));
+ (pr->power.states[i].promotion.state -
+ pr->power.states));
else
seq_puts(seq, "promotion[--] ");
if (pr->power.states[i].demotion.state)
seq_printf(seq, "demotion[C%zd] ",
- (pr->power.states[i].demotion.state -
- pr->power.states));
+ (pr->power.states[i].demotion.state -
+ pr->power.states));
else
seq_puts(seq, "demotion[--] ");
seq_printf(seq, "latency[%03d] usage[%08d]\n",
- pr->power.states[i].latency,
- pr->power.states[i].usage);
+ pr->power.states[i].latency,
+ pr->power.states[i].usage);
}
-end:
+ end:
return_VALUE(0);
}
static int acpi_processor_power_open_fs(struct inode *inode, struct file *file)
{
return single_open(file, acpi_processor_power_seq_show,
- PDE(inode)->data);
+ PDE(inode)->data);
}
static struct file_operations acpi_processor_power_fops = {
- .open = acpi_processor_power_open_fs,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
+ .open = acpi_processor_power_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
};
-int acpi_processor_power_init(struct acpi_processor *pr, struct acpi_device *device)
+int acpi_processor_power_init(struct acpi_processor *pr,
+ struct acpi_device *device)
{
- acpi_status status = 0;
- static int first_run = 0;
- struct proc_dir_entry *entry = NULL;
+ acpi_status status = 0;
+ static int first_run = 0;
+ struct proc_dir_entry *entry = NULL;
unsigned int i;
ACPI_FUNCTION_TRACE("acpi_processor_power_init");
@@ -995,7 +992,9 @@ int acpi_processor_power_init(struct acpi_processor *pr, struct acpi_device *dev
if (!first_run) {
dmi_check_system(processor_power_dmi_table);
if (max_cstate < ACPI_C_STATES_MAX)
- printk(KERN_NOTICE "ACPI: processor limited to max C-state %d\n", max_cstate);
+ printk(KERN_NOTICE
+ "ACPI: processor limited to max C-state %d\n",
+ max_cstate);
first_run++;
}
@@ -1003,7 +1002,8 @@ int acpi_processor_power_init(struct acpi_processor *pr, struct acpi_device *dev
return_VALUE(-EINVAL);
if (acpi_fadt.cst_cnt && !nocst) {
- status = acpi_os_write_port(acpi_fadt.smi_cmd, acpi_fadt.cst_cnt, 8);
+ status =
+ acpi_os_write_port(acpi_fadt.smi_cmd, acpi_fadt.cst_cnt, 8);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Notifying BIOS of _CST ability failed\n"));
@@ -1023,7 +1023,8 @@ int acpi_processor_power_init(struct acpi_processor *pr, struct acpi_device *dev
printk(KERN_INFO PREFIX "CPU%d (power states:", pr->id);
for (i = 1; i <= pr->power.count; i++)
if (pr->power.states[i].valid)
- printk(" C%d[C%d]", i, pr->power.states[i].type);
+ printk(" C%d[C%d]", i,
+ pr->power.states[i].type);
printk(")\n");
if (pr->id == 0) {
@@ -1034,11 +1035,11 @@ int acpi_processor_power_init(struct acpi_processor *pr, struct acpi_device *dev
/* 'power' [R] */
entry = create_proc_entry(ACPI_PROCESSOR_FILE_POWER,
- S_IRUGO, acpi_device_dir(device));
+ S_IRUGO, acpi_device_dir(device));
if (!entry)
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Unable to create '%s' fs entry\n",
- ACPI_PROCESSOR_FILE_POWER));
+ "Unable to create '%s' fs entry\n",
+ ACPI_PROCESSOR_FILE_POWER));
else {
entry->proc_fops = &acpi_processor_power_fops;
entry->data = acpi_driver_data(device);
@@ -1050,14 +1051,16 @@ int acpi_processor_power_init(struct acpi_processor *pr, struct acpi_device *dev
return_VALUE(0);
}
-int acpi_processor_power_exit(struct acpi_processor *pr, struct acpi_device *device)
+int acpi_processor_power_exit(struct acpi_processor *pr,
+ struct acpi_device *device)
{
ACPI_FUNCTION_TRACE("acpi_processor_power_exit");
pr->flags.power_setup_done = 0;
if (acpi_device_dir(device))
- remove_proc_entry(ACPI_PROCESSOR_FILE_POWER,acpi_device_dir(device));
+ remove_proc_entry(ACPI_PROCESSOR_FILE_POWER,
+ acpi_device_dir(device));
/* Unregister the idle handler when processor #0 is removed. */
if (pr->id == 0) {
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-05 05:30:02 +0000