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https://github.com/torvalds/linux.git
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ACPI: Lindent processor throttling code
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown
parent
01854e697a
commit
ff55a9ceba
@ -44,18 +44,18 @@
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#define _COMPONENT ACPI_PROCESSOR_COMPONENT
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ACPI_MODULE_NAME("processor_throttling");
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static int acpi_processor_get_throttling (struct acpi_processor *pr);
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int acpi_processor_set_throttling (struct acpi_processor *pr, int state);
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static int acpi_processor_get_throttling(struct acpi_processor *pr);
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int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
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static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
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{
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acpi_status status = 0;
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unsigned long tpc = 0;
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if(!pr)
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if (!pr)
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return -EINVAL;
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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){
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC"));
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return -ENODEV;
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}
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@ -102,7 +102,8 @@ static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
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if ((obj.type != ACPI_TYPE_BUFFER)
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|| (obj.buffer.length < sizeof(struct acpi_ptc_register))
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|| (obj.buffer.pointer == NULL)) {
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printk(KERN_ERR PREFIX "Invalid _PTC data (control_register)\n");
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printk(KERN_ERR PREFIX
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"Invalid _PTC data (control_register)\n");
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result = -EFAULT;
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goto end;
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}
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@ -124,9 +125,9 @@ static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
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}
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memcpy(&pr->throttling.status_register, obj.buffer.pointer,
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sizeof(struct acpi_ptc_register));
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sizeof(struct acpi_ptc_register));
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end:
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end:
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kfree(buffer.pointer);
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return result;
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@ -168,7 +169,9 @@ static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
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for (i = 0; i < pr->throttling.state_count; i++) {
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struct acpi_processor_tx_tss *tx = (struct acpi_processor_tx_tss *) &(pr->throttling.states_tss[i]);
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struct acpi_processor_tx_tss *tx =
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(struct acpi_processor_tx_tss *)&(pr->throttling.
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states_tss[i]);
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state.length = sizeof(struct acpi_processor_tx_tss);
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state.pointer = tx;
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@ -186,7 +189,7 @@ static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
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if (!tx->freqpercentage) {
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printk(KERN_ERR PREFIX
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"Invalid _TSS data: freq is zero\n");
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"Invalid _TSS data: freq is zero\n");
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result = -EFAULT;
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kfree(pr->throttling.states_tss);
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goto end;
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@ -198,14 +201,14 @@ static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
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return result;
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}
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static int acpi_processor_get_tsd(struct acpi_processor *pr)
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static int acpi_processor_get_tsd(struct acpi_processor *pr)
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{
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int result = 0;
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acpi_status status = AE_OK;
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struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
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struct acpi_buffer format = {sizeof("NNNNN"), "NNNNN"};
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struct acpi_buffer state = {0, NULL};
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union acpi_object *tsd = NULL;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_buffer format = { sizeof("NNNNN"), "NNNNN" };
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struct acpi_buffer state = { 0, NULL };
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union acpi_object *tsd = NULL;
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struct acpi_tsd_package *pdomain;
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status = acpi_evaluate_object(pr->handle, "_TSD", NULL, &buffer);
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@ -232,7 +235,7 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
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state.pointer = pdomain;
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status = acpi_extract_package(&(tsd->package.elements[0]),
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&format, &state);
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&format, &state);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _TSD data\n"));
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result = -EFAULT;
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@ -251,7 +254,7 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
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goto end;
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}
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end:
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end:
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kfree(buffer.pointer);
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return result;
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}
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@ -266,7 +269,6 @@ static int acpi_processor_get_throttling_fadt(struct acpi_processor *pr)
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u32 duty_mask = 0;
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u32 duty_value = 0;
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if (!pr)
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return -EINVAL;
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@ -306,65 +308,75 @@ static int acpi_processor_get_throttling_fadt(struct acpi_processor *pr)
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return 0;
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}
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static int acpi_read_throttling_status(struct acpi_processor_throttling *throttling)
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static int acpi_read_throttling_status(struct acpi_processor_throttling
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*throttling)
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{
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int value = -1;
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switch (throttling->status_register.space_id) {
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case ACPI_ADR_SPACE_SYSTEM_IO:
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acpi_os_read_port((acpi_io_address)throttling->status_register.address,
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&value,
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(u32)throttling->status_register.bit_width*8);
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acpi_os_read_port((acpi_io_address) throttling->status_register.
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address, &value,
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(u32) throttling->status_register.bit_width *
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8);
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break;
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case ACPI_ADR_SPACE_FIXED_HARDWARE:
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printk(KERN_ERR PREFIX "HARDWARE addr space,NOT supported yet\n");
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printk(KERN_ERR PREFIX
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"HARDWARE addr space,NOT supported yet\n");
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break;
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default:
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printk(KERN_ERR PREFIX "Unknown addr space %d\n",
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(u32) (throttling->status_register.space_id));
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(u32) (throttling->status_register.space_id));
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}
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return value;
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}
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static int acpi_write_throttling_state(struct acpi_processor_throttling *throttling,int value)
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static int acpi_write_throttling_state(struct acpi_processor_throttling
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*throttling, int value)
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{
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int ret = -1;
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switch (throttling->control_register.space_id) {
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case ACPI_ADR_SPACE_SYSTEM_IO:
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acpi_os_write_port((acpi_io_address)throttling->control_register.address,
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value,
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(u32)throttling->control_register.bit_width*8);
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acpi_os_write_port((acpi_io_address) throttling->
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control_register.address, value,
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(u32) throttling->control_register.
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bit_width * 8);
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ret = 0;
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break;
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case ACPI_ADR_SPACE_FIXED_HARDWARE:
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printk(KERN_ERR PREFIX "HARDWARE addr space,NOT supported yet\n");
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printk(KERN_ERR PREFIX
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"HARDWARE addr space,NOT supported yet\n");
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break;
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default:
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printk(KERN_ERR PREFIX "Unknown addr space %d\n",
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(u32) (throttling->control_register.space_id));
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(u32) (throttling->control_register.space_id));
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}
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return ret;
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}
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static int acpi_get_throttling_state(struct acpi_processor *pr,int value)
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static int acpi_get_throttling_state(struct acpi_processor *pr, int value)
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{
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int i;
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for (i = 0; i < pr->throttling.state_count; i++) {
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struct acpi_processor_tx_tss *tx = (struct acpi_processor_tx_tss *) &(pr->throttling.states_tss[i]);
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if(tx->control == value)
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struct acpi_processor_tx_tss *tx =
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(struct acpi_processor_tx_tss *)&(pr->throttling.
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states_tss[i]);
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if (tx->control == value)
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break;
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}
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if(i > pr->throttling.state_count)
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i=-1;
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if (i > pr->throttling.state_count)
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i = -1;
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return i;
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}
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static int acpi_get_throttling_value(struct acpi_processor *pr,int state)
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static int acpi_get_throttling_value(struct acpi_processor *pr, int state)
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{
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int value = -1;
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if(state >=0 && state <= pr->throttling.state_count){
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struct acpi_processor_tx_tss *tx = (struct acpi_processor_tx_tss *) &(pr->throttling.states_tss[state]);
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if (state >= 0 && state <= pr->throttling.state_count) {
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struct acpi_processor_tx_tss *tx =
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(struct acpi_processor_tx_tss *)&(pr->throttling.
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states_tss[state]);
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value = tx->control;
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}
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return value;
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@ -375,7 +387,6 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
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int state = 0;
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u32 value = 0;
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if (!pr)
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return -EINVAL;
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@ -385,8 +396,8 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
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pr->throttling.state = 0;
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local_irq_disable();
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value = acpi_read_throttling_status(&pr->throttling);
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if(value >= 0){
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state = acpi_get_throttling_state(pr,value);
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if (value >= 0) {
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state = acpi_get_throttling_state(pr, value);
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pr->throttling.state = state;
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}
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local_irq_enable();
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@ -394,7 +405,6 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
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return 0;
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}
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static int acpi_processor_get_throttling(struct acpi_processor *pr)
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{
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return pr->throttling.acpi_processor_get_throttling(pr);
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@ -406,7 +416,6 @@ int acpi_processor_set_throttling_fadt(struct acpi_processor *pr, int state)
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u32 duty_mask = 0;
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u32 duty_value = 0;
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if (!pr)
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return -EINVAL;
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@ -494,9 +503,9 @@ int acpi_processor_set_throttling_ptc(struct acpi_processor *pr, int state)
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local_irq_disable();
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value = acpi_get_throttling_value(pr,state);
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if(value >=0){
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acpi_write_throttling_state(&pr->throttling,value);
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value = acpi_get_throttling_value(pr, state);
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if (value >= 0) {
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acpi_write_throttling_state(&pr->throttling, value);
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pr->throttling.state = state;
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}
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local_irq_enable();
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@ -506,7 +515,7 @@ int acpi_processor_set_throttling_ptc(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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{
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return pr->throttling.acpi_processor_set_throttling(pr,state);
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return pr->throttling.acpi_processor_set_throttling(pr, state);
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}
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int acpi_processor_get_throttling_info(struct acpi_processor *pr)
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@ -518,7 +527,6 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
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int no_tss = 0;
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int no_tsd = 0;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
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pr->throttling.address,
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@ -533,12 +541,16 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
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no_tss = acpi_processor_get_throttling_states(pr);
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no_tsd = acpi_processor_get_tsd(pr);
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if(no_ptc || no_tss) {
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pr->throttling.acpi_processor_get_throttling = &acpi_processor_get_throttling_fadt;
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pr->throttling.acpi_processor_set_throttling = &acpi_processor_set_throttling_fadt;
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if (no_ptc || no_tss) {
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pr->throttling.acpi_processor_get_throttling =
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&acpi_processor_get_throttling_fadt;
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pr->throttling.acpi_processor_set_throttling =
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&acpi_processor_set_throttling_fadt;
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} else {
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pr->throttling.acpi_processor_get_throttling = &acpi_processor_get_throttling_ptc;
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pr->throttling.acpi_processor_set_throttling = &acpi_processor_set_throttling_ptc;
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pr->throttling.acpi_processor_get_throttling =
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&acpi_processor_get_throttling_ptc;
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pr->throttling.acpi_processor_set_throttling =
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&acpi_processor_set_throttling_ptc;
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}
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if (!pr->throttling.address) {
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@ -620,7 +632,6 @@ static int acpi_processor_throttling_seq_show(struct seq_file *seq,
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int i = 0;
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int result = 0;
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if (!pr)
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goto end;
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@ -639,24 +650,24 @@ static int acpi_processor_throttling_seq_show(struct seq_file *seq,
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seq_printf(seq, "state count: %d\n"
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"active state: T%d\n"
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"state available: T%d to T%d\n",
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"state available: T%d to T%d\n",
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pr->throttling.state_count, pr->throttling.state,
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pr->throttling_platform_limit,
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pr->throttling.state_count-1);
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pr->throttling_platform_limit,
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pr->throttling.state_count - 1);
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seq_puts(seq, "states:\n");
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if(acpi_processor_get_throttling == acpi_processor_get_throttling_fadt)
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if (acpi_processor_get_throttling == acpi_processor_get_throttling_fadt)
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for (i = 0; i < pr->throttling.state_count; i++)
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seq_printf(seq, " %cT%d: %02d%%\n",
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(i == pr->throttling.state ? '*' : ' '), i,
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(pr->throttling.states[i].performance ? pr->
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throttling.states[i].performance / 10 : 0));
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(i == pr->throttling.state ? '*' : ' '), i,
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(pr->throttling.states[i].performance ? pr->
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throttling.states[i].performance / 10 : 0));
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else
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for (i = 0; i < pr->throttling.state_count; i++)
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seq_printf(seq, " %cT%d: %02d%%\n",
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(i == pr->throttling.state ? '*' : ' '), i,
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(int)pr->throttling.states_tss[i].freqpercentage);
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(i == pr->throttling.state ? '*' : ' '), i,
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(int)pr->throttling.states_tss[i].
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freqpercentage);
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end:
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return 0;
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@ -669,7 +680,7 @@ static int acpi_processor_throttling_open_fs(struct inode *inode,
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PDE(inode)->data);
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}
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static ssize_t acpi_processor_write_throttling(struct file * file,
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static ssize_t acpi_processor_write_throttling(struct file *file,
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const char __user * buffer,
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size_t count, loff_t * data)
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{
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@ -678,7 +689,6 @@ static ssize_t acpi_processor_write_throttling(struct file * file,
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struct acpi_processor *pr = m->private;
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char state_string[12] = { '\0' };
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if (!pr || (count > sizeof(state_string) - 1))
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return -EINVAL;
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@ -167,8 +167,9 @@ struct acpi_processor_throttling {
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struct acpi_processor_tx_tss *states_tss;
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struct acpi_tsd_package domain_info;
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cpumask_t shared_cpu_map;
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int (*acpi_processor_get_throttling) (struct acpi_processor *pr);
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int (*acpi_processor_set_throttling) (struct acpi_processor *pr, int state);
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int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
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int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
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int state);
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u32 address;
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u8 duty_offset;
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@ -207,7 +208,7 @@ struct acpi_processor {
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u32 pblk;
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int performance_platform_limit;
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int throttling_platform_limit;
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/*0 - states 0..n-th satte available*/
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/* 0 - states 0..n-th state available */
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struct acpi_processor_flags flags;
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struct acpi_processor_power power;
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