#define _COMPONENT ACPI_PROCESSOR_COMPONENT
ACPI_MODULE_NAME("processor_throttling");
-static int acpi_processor_get_throttling (struct acpi_processor *pr);
-int acpi_processor_set_throttling (struct acpi_processor *pr, int state);
+static int acpi_processor_get_throttling(struct acpi_processor *pr);
+int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
+/*
+ * _TPC - Throttling Present Capabilities
+ */
static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
{
acpi_status status = 0;
unsigned long tpc = 0;
- if(!pr)
+ if (!pr)
return -EINVAL;
status = acpi_evaluate_integer(pr->handle, "_TPC", NULL, &tpc);
- if(ACPI_FAILURE(status) && status != AE_NOT_FOUND){
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC"));
+ if (ACPI_FAILURE(status)) {
+ if (status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC"));
+ }
return -ENODEV;
}
pr->throttling_platform_limit = (int)tpc;
return acpi_processor_get_platform_limit(pr);
}
-/* --------------------------------------------------------------------------
- _PTC, _TSS, _TSD support
- -------------------------------------------------------------------------- */
+/*
+ * _PTC - Processor Throttling Control (and status) register location
+ */
static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
{
int result = 0;
status = acpi_evaluate_object(pr->handle, "_PTC", NULL, &buffer);
if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTC"));
+ if (status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTC"));
+ }
return -ENODEV;
}
if ((obj.type != ACPI_TYPE_BUFFER)
|| (obj.buffer.length < sizeof(struct acpi_ptc_register))
|| (obj.buffer.pointer == NULL)) {
- printk(KERN_ERR PREFIX "Invalid _PTC data (control_register)\n");
+ printk(KERN_ERR PREFIX
+ "Invalid _PTC data (control_register)\n");
result = -EFAULT;
goto end;
}
}
memcpy(&pr->throttling.status_register, obj.buffer.pointer,
- sizeof(struct acpi_ptc_register));
+ sizeof(struct acpi_ptc_register));
- end:
+ end:
kfree(buffer.pointer);
return result;
}
+
+/*
+ * _TSS - Throttling Supported States
+ */
static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
{
int result = 0;
status = acpi_evaluate_object(pr->handle, "_TSS", NULL, &buffer);
if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSS"));
+ if (status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSS"));
+ }
return -ENODEV;
}
for (i = 0; i < pr->throttling.state_count; i++) {
- struct acpi_processor_tx_tss *tx = (struct acpi_processor_tx_tss *) &(pr->throttling.states_tss[i]);
+ struct acpi_processor_tx_tss *tx =
+ (struct acpi_processor_tx_tss *)&(pr->throttling.
+ states_tss[i]);
state.length = sizeof(struct acpi_processor_tx_tss);
state.pointer = tx;
if (!tx->freqpercentage) {
printk(KERN_ERR PREFIX
- "Invalid _TSS data: freq is zero\n");
+ "Invalid _TSS data: freq is zero\n");
result = -EFAULT;
kfree(pr->throttling.states_tss);
goto end;
return result;
}
-static int acpi_processor_get_tsd(struct acpi_processor *pr)
+
+/*
+ * _TSD - T-State Dependencies
+ */
+static int acpi_processor_get_tsd(struct acpi_processor *pr)
{
int result = 0;
acpi_status status = AE_OK;
- struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
- struct acpi_buffer format = {sizeof("NNNNN"), "NNNNN"};
- struct acpi_buffer state = {0, NULL};
- union acpi_object *tsd = NULL;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct acpi_buffer format = { sizeof("NNNNN"), "NNNNN" };
+ struct acpi_buffer state = { 0, NULL };
+ union acpi_object *tsd = NULL;
struct acpi_tsd_package *pdomain;
status = acpi_evaluate_object(pr->handle, "_TSD", NULL, &buffer);
if (ACPI_FAILURE(status)) {
+ if (status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSD"));
+ }
return -ENODEV;
}
state.pointer = pdomain;
status = acpi_extract_package(&(tsd->package.elements[0]),
- &format, &state);
+ &format, &state);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _TSD data\n"));
result = -EFAULT;
goto end;
}
-end:
+ end:
kfree(buffer.pointer);
return result;
}
u32 duty_mask = 0;
u32 duty_value = 0;
-
if (!pr)
return -EINVAL;
return 0;
}
-static int acpi_read_throttling_status(struct acpi_processor_throttling *throttling)
+static int acpi_read_throttling_status(struct acpi_processor_throttling
+ *throttling)
{
int value = -1;
switch (throttling->status_register.space_id) {
case ACPI_ADR_SPACE_SYSTEM_IO:
- acpi_os_read_port((acpi_io_address)throttling->status_register.address,
- &value,
- (u32)throttling->status_register.bit_width*8);
+ acpi_os_read_port((acpi_io_address) throttling->status_register.
+ address, &value,
+ (u32) throttling->status_register.bit_width *
+ 8);
break;
case ACPI_ADR_SPACE_FIXED_HARDWARE:
- printk(KERN_ERR PREFIX "HARDWARE addr space,NOT supported yet\n");
+ printk(KERN_ERR PREFIX
+ "HARDWARE addr space,NOT supported yet\n");
break;
default:
printk(KERN_ERR PREFIX "Unknown addr space %d\n",
- (u32) (throttling->status_register.space_id));
+ (u32) (throttling->status_register.space_id));
}
return value;
}
-static int acpi_write_throttling_state(struct acpi_processor_throttling *throttling,int value)
+static int acpi_write_throttling_state(struct acpi_processor_throttling
+ *throttling, int value)
{
int ret = -1;
switch (throttling->control_register.space_id) {
case ACPI_ADR_SPACE_SYSTEM_IO:
- acpi_os_write_port((acpi_io_address)throttling->control_register.address,
- value,
- (u32)throttling->control_register.bit_width*8);
+ acpi_os_write_port((acpi_io_address) throttling->
+ control_register.address, value,
+ (u32) throttling->control_register.
+ bit_width * 8);
ret = 0;
break;
case ACPI_ADR_SPACE_FIXED_HARDWARE:
- printk(KERN_ERR PREFIX "HARDWARE addr space,NOT supported yet\n");
+ printk(KERN_ERR PREFIX
+ "HARDWARE addr space,NOT supported yet\n");
break;
default:
printk(KERN_ERR PREFIX "Unknown addr space %d\n",
- (u32) (throttling->control_register.space_id));
+ (u32) (throttling->control_register.space_id));
}
return ret;
}
-static int acpi_get_throttling_state(struct acpi_processor *pr,int value)
+static int acpi_get_throttling_state(struct acpi_processor *pr, int value)
{
int i;
for (i = 0; i < pr->throttling.state_count; i++) {
- struct acpi_processor_tx_tss *tx = (struct acpi_processor_tx_tss *) &(pr->throttling.states_tss[i]);
- if(tx->control == value)
+ struct acpi_processor_tx_tss *tx =
+ (struct acpi_processor_tx_tss *)&(pr->throttling.
+ states_tss[i]);
+ if (tx->control == value)
break;
}
- if(i > pr->throttling.state_count)
- i=-1;
+ if (i > pr->throttling.state_count)
+ i = -1;
return i;
}
-static int acpi_get_throttling_value(struct acpi_processor *pr,int state)
+static int acpi_get_throttling_value(struct acpi_processor *pr, int state)
{
int value = -1;
- if(state >=0 && state <= pr->throttling.state_count){
- struct acpi_processor_tx_tss *tx = (struct acpi_processor_tx_tss *) &(pr->throttling.states_tss[state]);
+ if (state >= 0 && state <= pr->throttling.state_count) {
+ struct acpi_processor_tx_tss *tx =
+ (struct acpi_processor_tx_tss *)&(pr->throttling.
+ states_tss[state]);
value = tx->control;
}
return value;
int state = 0;
u32 value = 0;
-
if (!pr)
return -EINVAL;
pr->throttling.state = 0;
local_irq_disable();
value = acpi_read_throttling_status(&pr->throttling);
- if(value >= 0){
- state = acpi_get_throttling_state(pr,value);
+ if (value >= 0) {
+ state = acpi_get_throttling_state(pr, value);
pr->throttling.state = state;
}
local_irq_enable();
return 0;
}
-
static int acpi_processor_get_throttling(struct acpi_processor *pr)
{
return pr->throttling.acpi_processor_get_throttling(pr);
}
-int acpi_processor_set_throttling_fadt(struct acpi_processor *pr, int state)
+static int acpi_processor_set_throttling_fadt(struct acpi_processor *pr,
+ int state)
{
u32 value = 0;
u32 duty_mask = 0;
u32 duty_value = 0;
-
if (!pr)
return -EINVAL;
return 0;
}
-int acpi_processor_set_throttling_ptc(struct acpi_processor *pr, int state)
+static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
+ int state)
{
u32 value = 0;
local_irq_disable();
- value = acpi_get_throttling_value(pr,state);
- if(value >=0){
- acpi_write_throttling_state(&pr->throttling,value);
+ value = acpi_get_throttling_value(pr, state);
+ if (value >= 0) {
+ acpi_write_throttling_state(&pr->throttling, value);
pr->throttling.state = state;
}
local_irq_enable();
int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
{
- return pr->throttling.acpi_processor_set_throttling(pr,state);
+ return pr->throttling.acpi_processor_set_throttling(pr, state);
}
int acpi_processor_get_throttling_info(struct acpi_processor *pr)
int result = 0;
int step = 0;
int i = 0;
- int no_ptc = 0;
- int no_tss = 0;
- int no_tsd = 0;
-
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
if (!pr)
return -EINVAL;
- /* TBD: Support ACPI 2.0 objects */
- no_ptc = acpi_processor_get_throttling_control(pr);
- no_tss = acpi_processor_get_throttling_states(pr);
- no_tsd = acpi_processor_get_tsd(pr);
-
- if(no_ptc || no_tss) {
- pr->throttling.acpi_processor_get_throttling = &acpi_processor_get_throttling_fadt;
- pr->throttling.acpi_processor_set_throttling = &acpi_processor_set_throttling_fadt;
+ /*
+ * Evaluate _PTC, _TSS and _TPC
+ * They must all be present or none of them can be used.
+ */
+ if (acpi_processor_get_throttling_control(pr) ||
+ acpi_processor_get_throttling_states(pr) ||
+ acpi_processor_get_platform_limit(pr))
+ {
+ pr->throttling.acpi_processor_get_throttling =
+ &acpi_processor_get_throttling_fadt;
+ pr->throttling.acpi_processor_set_throttling =
+ &acpi_processor_set_throttling_fadt;
} else {
- pr->throttling.acpi_processor_get_throttling = &acpi_processor_get_throttling_ptc;
- pr->throttling.acpi_processor_set_throttling = &acpi_processor_set_throttling_ptc;
+ pr->throttling.acpi_processor_get_throttling =
+ &acpi_processor_get_throttling_ptc;
+ pr->throttling.acpi_processor_set_throttling =
+ &acpi_processor_set_throttling_ptc;
}
+ acpi_processor_get_tsd(pr);
+
if (!pr->throttling.address) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No throttling register\n"));
return 0;
int i = 0;
int result = 0;
-
if (!pr)
goto end;
seq_printf(seq, "state count: %d\n"
"active state: T%d\n"
- "state available: T%d to T%d\n",
+ "state available: T%d to T%d\n",
pr->throttling.state_count, pr->throttling.state,
- pr->throttling_platform_limit,
- pr->throttling.state_count-1);
+ pr->throttling_platform_limit,
+ pr->throttling.state_count - 1);
seq_puts(seq, "states:\n");
- if(acpi_processor_get_throttling == acpi_processor_get_throttling_fadt)
+ if (pr->throttling.acpi_processor_get_throttling ==
+ acpi_processor_get_throttling_fadt) {
for (i = 0; i < pr->throttling.state_count; i++)
seq_printf(seq, " %cT%d: %02d%%\n",
- (i == pr->throttling.state ? '*' : ' '), i,
- (pr->throttling.states[i].performance ? pr->
- throttling.states[i].performance / 10 : 0));
- else
+ (i == pr->throttling.state ? '*' : ' '), i,
+ (pr->throttling.states[i].performance ? pr->
+ throttling.states[i].performance / 10 : 0));
+ } else {
for (i = 0; i < pr->throttling.state_count; i++)
seq_printf(seq, " %cT%d: %02d%%\n",
- (i == pr->throttling.state ? '*' : ' '), i,
- (int)pr->throttling.states_tss[i].freqpercentage);
-
+ (i == pr->throttling.state ? '*' : ' '), i,
+ (int)pr->throttling.states_tss[i].
+ freqpercentage);
+ }
end:
return 0;
PDE(inode)->data);
}
-static ssize_t acpi_processor_write_throttling(struct file * file,
+static ssize_t acpi_processor_write_throttling(struct file *file,
const char __user * buffer,
size_t count, loff_t * data)
{
struct acpi_processor *pr = m->private;
char state_string[12] = { '\0' };
-
if (!pr || (count > sizeof(state_string) - 1))
return -EINVAL;
projects / linux-2.6-omap-h63xx.git / blobdiff