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Lines 47-52
ACPI_MODULE_NAME("processor_throttling");
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| 47 |
static int acpi_processor_get_throttling(struct acpi_processor *pr); |
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static int acpi_processor_get_throttling(struct acpi_processor *pr); |
| 48 |
int acpi_processor_set_throttling(struct acpi_processor *pr, int state); |
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int acpi_processor_set_throttling(struct acpi_processor *pr, int state); |
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50 |
/* |
| 51 |
* _TPC - Throttling Present Capabilities |
| 52 |
*/ |
| 50 |
static int acpi_processor_get_platform_limit(struct acpi_processor *pr) |
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static int acpi_processor_get_platform_limit(struct acpi_processor *pr) |
| 51 |
{ |
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{ |
| 52 |
acpi_status status = 0; |
55 |
acpi_status status = 0; |
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Lines 55-62
static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
Link Here
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| 55 |
if (!pr) |
58 |
if (!pr) |
| 56 |
return -EINVAL; |
59 |
return -EINVAL; |
| 57 |
status = acpi_evaluate_integer(pr->handle, "_TPC", NULL, &tpc); |
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status = acpi_evaluate_integer(pr->handle, "_TPC", NULL, &tpc); |
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
61 |
if (ACPI_FAILURE(status)) { |
| 59 |
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC")); |
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if (status != AE_NOT_FOUND) { |
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC")); |
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} |
| 60 |
return -ENODEV; |
65 |
return -ENODEV; |
| 61 |
} |
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} |
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pr->throttling_platform_limit = (int)tpc; |
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pr->throttling_platform_limit = (int)tpc; |
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Lines 68-76
int acpi_processor_tstate_has_changed(struct acpi_processor *pr)
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| 68 |
return acpi_processor_get_platform_limit(pr); |
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return acpi_processor_get_platform_limit(pr); |
| 69 |
} |
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} |
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| 71 |
/* -------------------------------------------------------------------------- |
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/* |
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_PTC, _TSS, _TSD support |
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* _PTC - Processor Throttling Control (and status) register location |
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-------------------------------------------------------------------------- */ |
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*/ |
| 74 |
static int acpi_processor_get_throttling_control(struct acpi_processor *pr) |
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static int acpi_processor_get_throttling_control(struct acpi_processor *pr) |
| 75 |
{ |
80 |
{ |
| 76 |
int result = 0; |
81 |
int result = 0; |
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Lines 81-87
static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
Link Here
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| 81 |
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| 82 |
status = acpi_evaluate_object(pr->handle, "_PTC", NULL, &buffer); |
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status = acpi_evaluate_object(pr->handle, "_PTC", NULL, &buffer); |
| 83 |
if (ACPI_FAILURE(status)) { |
88 |
if (ACPI_FAILURE(status)) { |
| 84 |
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTC")); |
89 |
if (status != AE_NOT_FOUND) { |
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTC")); |
| 91 |
} |
| 85 |
return -ENODEV; |
92 |
return -ENODEV; |
| 86 |
} |
93 |
} |
| 87 |
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Lines 132-137
static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
Link Here
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| 132 |
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| 133 |
return result; |
140 |
return result; |
| 134 |
} |
141 |
} |
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142 |
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| 143 |
/* |
| 144 |
* _TSS - Throttling Supported States |
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*/ |
| 135 |
static int acpi_processor_get_throttling_states(struct acpi_processor *pr) |
146 |
static int acpi_processor_get_throttling_states(struct acpi_processor *pr) |
| 136 |
{ |
147 |
{ |
| 137 |
int result = 0; |
148 |
int result = 0; |
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Lines 144-150
static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
Link Here
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| 144 |
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| 145 |
status = acpi_evaluate_object(pr->handle, "_TSS", NULL, &buffer); |
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status = acpi_evaluate_object(pr->handle, "_TSS", NULL, &buffer); |
| 146 |
if (ACPI_FAILURE(status)) { |
157 |
if (ACPI_FAILURE(status)) { |
| 147 |
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSS")); |
158 |
if (status != AE_NOT_FOUND) { |
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159 |
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSS")); |
| 160 |
} |
| 148 |
return -ENODEV; |
161 |
return -ENODEV; |
| 149 |
} |
162 |
} |
| 150 |
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163 |
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Lines 201-206
static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
Link Here
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| 201 |
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| 202 |
return result; |
215 |
return result; |
| 203 |
} |
216 |
} |
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217 |
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| 218 |
/* |
| 219 |
* _TSD - T-State Dependencies |
| 220 |
*/ |
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static int acpi_processor_get_tsd(struct acpi_processor *pr) |
221 |
static int acpi_processor_get_tsd(struct acpi_processor *pr) |
| 205 |
{ |
222 |
{ |
| 206 |
int result = 0; |
223 |
int result = 0; |
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Lines 213-218
static int acpi_processor_get_tsd(struct acpi_processor *pr)
Link Here
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| 213 |
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| 214 |
status = acpi_evaluate_object(pr->handle, "_TSD", NULL, &buffer); |
231 |
status = acpi_evaluate_object(pr->handle, "_TSD", NULL, &buffer); |
| 215 |
if (ACPI_FAILURE(status)) { |
232 |
if (ACPI_FAILURE(status)) { |
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233 |
if (status != AE_NOT_FOUND) { |
| 234 |
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSD")); |
| 235 |
} |
| 216 |
return -ENODEV; |
236 |
return -ENODEV; |
| 217 |
} |
237 |
} |
| 218 |
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238 |
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Lines 525-533
int acpi_processor_get_throttling_info(struct acpi_processor *pr)
Link Here
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| 525 |
int result = 0; |
545 |
int result = 0; |
| 526 |
int step = 0; |
546 |
int step = 0; |
| 527 |
int i = 0; |
547 |
int i = 0; |
| 528 |
int no_ptc = 0; |
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| 529 |
int no_tss = 0; |
| 530 |
int no_tsd = 0; |
| 531 |
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| 532 |
ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
549 |
ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 533 |
"pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n", |
550 |
"pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n", |
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Lines 538-549
int acpi_processor_get_throttling_info(struct acpi_processor *pr)
Link Here
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| 538 |
if (!pr) |
555 |
if (!pr) |
| 539 |
return -EINVAL; |
556 |
return -EINVAL; |
| 540 |
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557 |
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| 541 |
/* TBD: Support ACPI 2.0 objects */ |
558 |
/* |
| 542 |
no_ptc = acpi_processor_get_throttling_control(pr); |
559 |
* Evaluate _PTC, _TSS and _TPC |
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no_tss = acpi_processor_get_throttling_states(pr); |
560 |
* They must all be present or none of them can be used. |
| 544 |
no_tsd = acpi_processor_get_tsd(pr); |
561 |
*/ |
| 545 |
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562 |
if (acpi_processor_get_throttling_control(pr) || |
| 546 |
if (no_ptc || no_tss) { |
563 |
acpi_processor_get_throttling_states(pr) || |
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564 |
acpi_processor_get_platform_limit(pr)) |
| 565 |
{ |
| 547 |
pr->throttling.acpi_processor_get_throttling = |
566 |
pr->throttling.acpi_processor_get_throttling = |
| 548 |
&acpi_processor_get_throttling_fadt; |
567 |
&acpi_processor_get_throttling_fadt; |
| 549 |
pr->throttling.acpi_processor_set_throttling = |
568 |
pr->throttling.acpi_processor_set_throttling = |
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Lines 555-560
int acpi_processor_get_throttling_info(struct acpi_processor *pr)
Link Here
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| 555 |
&acpi_processor_set_throttling_ptc; |
574 |
&acpi_processor_set_throttling_ptc; |
| 556 |
} |
575 |
} |
| 557 |
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576 |
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577 |
acpi_processor_get_tsd(pr); |
| 578 |
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| 558 |
if (!pr->throttling.address) { |
579 |
if (!pr->throttling.address) { |
| 559 |
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No throttling register\n")); |
580 |
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No throttling register\n")); |
| 560 |
return 0; |
581 |
return 0; |