ACPI: add ACPI 3.0 _TPC _TSS _PTC throttling support
adds _TPC _TSS _PTC -- Throttling Present Capabilities Signed-off-by: Luming Yu <luming.yu@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Luming Yu
Len Brown
parent
f285e3d329
commit
01854e697a
3 changed files with 423 additions and 9 deletions
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@ -66,6 +66,7 @@
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#define ACPI_PROCESSOR_FILE_LIMIT "limit"
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#define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80
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#define ACPI_PROCESSOR_NOTIFY_POWER 0x81
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#define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82
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#define ACPI_PROCESSOR_LIMIT_USER 0
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#define ACPI_PROCESSOR_LIMIT_THERMAL 1
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@ -84,6 +85,8 @@ static int acpi_processor_info_open_fs(struct inode *inode, struct file *file);
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static void acpi_processor_notify(acpi_handle handle, u32 event, void *data);
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static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu);
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static int acpi_processor_handle_eject(struct acpi_processor *pr);
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extern int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
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static struct acpi_driver acpi_processor_driver = {
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.name = "processor",
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@ -699,6 +702,9 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
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acpi_processor_cst_has_changed(pr);
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acpi_bus_generate_event(device, event, 0);
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break;
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case ACPI_PROCESSOR_NOTIFY_THROTTLING:
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acpi_processor_tstate_has_changed(pr);
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acpi_bus_generate_event(device, event, 0);
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default:
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Unsupported event [0x%x]\n", event));
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@ -44,10 +44,222 @@
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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_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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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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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC"));
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return -ENODEV;
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}
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pr->throttling_platform_limit = (int)tpc;
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return 0;
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}
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int acpi_processor_tstate_has_changed(struct acpi_processor *pr)
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{
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return acpi_processor_get_platform_limit(pr);
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}
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/* --------------------------------------------------------------------------
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_PTC, _TSS, _TSD support
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-------------------------------------------------------------------------- */
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static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
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{
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int result = 0;
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acpi_status status = 0;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *ptc = NULL;
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union acpi_object obj = { 0 };
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status = acpi_evaluate_object(pr->handle, "_PTC", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTC"));
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return -ENODEV;
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}
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ptc = (union acpi_object *)buffer.pointer;
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if (!ptc || (ptc->type != ACPI_TYPE_PACKAGE)
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|| (ptc->package.count != 2)) {
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printk(KERN_ERR PREFIX "Invalid _PTC data\n");
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result = -EFAULT;
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goto end;
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}
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/*
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* control_register
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*/
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obj = ptc->package.elements[0];
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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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result = -EFAULT;
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goto end;
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}
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memcpy(&pr->throttling.control_register, obj.buffer.pointer,
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sizeof(struct acpi_ptc_register));
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/*
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* status_register
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*/
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obj = ptc->package.elements[1];
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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 (status_register)\n");
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result = -EFAULT;
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goto end;
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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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end:
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kfree(buffer.pointer);
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return result;
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}
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static int acpi_processor_get_throttling_states(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 *tss = NULL;
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int i;
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status = acpi_evaluate_object(pr->handle, "_TSS", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSS"));
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return -ENODEV;
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}
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tss = buffer.pointer;
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if (!tss || (tss->type != ACPI_TYPE_PACKAGE)) {
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printk(KERN_ERR PREFIX "Invalid _TSS data\n");
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result = -EFAULT;
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goto end;
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d throttling states\n",
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tss->package.count));
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pr->throttling.state_count = tss->package.count;
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pr->throttling.states_tss =
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kmalloc(sizeof(struct acpi_processor_tx_tss) * tss->package.count,
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GFP_KERNEL);
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if (!pr->throttling.states_tss) {
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result = -ENOMEM;
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goto end;
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}
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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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state.length = sizeof(struct acpi_processor_tx_tss);
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state.pointer = tx;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Extracting state %d\n", i));
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status = acpi_extract_package(&(tss->package.elements[i]),
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&format, &state);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Invalid _TSS data"));
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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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}
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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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result = -EFAULT;
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kfree(pr->throttling.states_tss);
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goto end;
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}
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}
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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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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_tsd_package *pdomain;
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status = acpi_evaluate_object(pr->handle, "_TSD", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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return -ENODEV;
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}
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tsd = buffer.pointer;
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if (!tsd || (tsd->type != ACPI_TYPE_PACKAGE)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _TSD data\n"));
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result = -EFAULT;
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goto end;
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}
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if (tsd->package.count != 1) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _TSD data\n"));
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result = -EFAULT;
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goto end;
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}
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pdomain = &(pr->throttling.domain_info);
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state.length = sizeof(struct acpi_tsd_package);
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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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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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goto end;
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}
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if (pdomain->num_entries != ACPI_TSD_REV0_ENTRIES) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _TSD:num_entries\n"));
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result = -EFAULT;
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goto end;
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}
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if (pdomain->revision != ACPI_TSD_REV0_REVISION) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _TSD:revision\n"));
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result = -EFAULT;
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goto end;
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}
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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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/* --------------------------------------------------------------------------
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Throttling Control
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-------------------------------------------------------------------------- */
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static int acpi_processor_get_throttling(struct acpi_processor *pr)
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static int acpi_processor_get_throttling_fadt(struct acpi_processor *pr)
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{
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int state = 0;
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u32 value = 0;
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@ -94,7 +306,101 @@ static int acpi_processor_get_throttling(struct acpi_processor *pr)
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return 0;
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}
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int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
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static int acpi_read_throttling_status(struct acpi_processor_throttling *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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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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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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}
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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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{
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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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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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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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}
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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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{
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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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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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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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{
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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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value = tx->control;
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}
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return value;
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}
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static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
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{
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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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if (!pr->flags.throttling)
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return -ENODEV;
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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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pr->throttling.state = state;
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}
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local_irq_enable();
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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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}
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int acpi_processor_set_throttling_fadt(struct acpi_processor *pr, int state)
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{
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u32 value = 0;
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u32 duty_mask = 0;
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@ -113,6 +419,8 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
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if (state == pr->throttling.state)
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return 0;
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if (state < pr->throttling_platform_limit)
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return -EPERM;
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/*
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* Calculate the duty_value and duty_mask.
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*/
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@ -165,11 +473,50 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
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return 0;
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}
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int acpi_processor_set_throttling_ptc(struct acpi_processor *pr, int state)
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{
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u32 value = 0;
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if (!pr)
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return -EINVAL;
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if ((state < 0) || (state > (pr->throttling.state_count - 1)))
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return -EINVAL;
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if (!pr->flags.throttling)
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return -ENODEV;
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if (state == pr->throttling.state)
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return 0;
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if (state < pr->throttling_platform_limit)
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return -EPERM;
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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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pr->throttling.state = state;
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}
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local_irq_enable();
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return 0;
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}
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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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}
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int acpi_processor_get_throttling_info(struct acpi_processor *pr)
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{
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int result = 0;
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int step = 0;
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int i = 0;
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int no_ptc = 0;
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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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@ -182,6 +529,17 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
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return -EINVAL;
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/* TBD: Support ACPI 2.0 objects */
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no_ptc = acpi_processor_get_throttling_control(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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} 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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}
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if (!pr->throttling.address) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No throttling register\n"));
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@ -280,15 +638,25 @@ static int acpi_processor_throttling_seq_show(struct seq_file *seq,
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}
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seq_printf(seq, "state count: %d\n"
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"active state: T%d\n",
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pr->throttling.state_count, pr->throttling.state);
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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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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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seq_puts(seq, "states:\n");
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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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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",
|
||||
(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);
|
||||
|
||||
|
||||
end:
|
||||
return 0;
|
||||
|
|
|
|||
|
|
@ -21,6 +21,8 @@
|
|||
#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
|
||||
#define ACPI_PSD_REV0_ENTRIES 5
|
||||
|
||||
#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
|
||||
#define ACPI_TSD_REV0_ENTRIES 5
|
||||
/*
|
||||
* Types of coordination defined in ACPI 3.0. Same macros can be used across
|
||||
* P, C and T states
|
||||
|
|
@ -125,17 +127,52 @@ struct acpi_processor_performance {
|
|||
|
||||
/* Throttling Control */
|
||||
|
||||
struct acpi_tsd_package {
|
||||
acpi_integer num_entries;
|
||||
acpi_integer revision;
|
||||
acpi_integer domain;
|
||||
acpi_integer coord_type;
|
||||
acpi_integer num_processors;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
struct acpi_ptc_register {
|
||||
u8 descriptor;
|
||||
u16 length;
|
||||
u8 space_id;
|
||||
u8 bit_width;
|
||||
u8 bit_offset;
|
||||
u8 reserved;
|
||||
u64 address;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
struct acpi_processor_tx_tss {
|
||||
acpi_integer freqpercentage; /* */
|
||||
acpi_integer power; /* milliWatts */
|
||||
acpi_integer transition_latency; /* microseconds */
|
||||
acpi_integer control; /* control value */
|
||||
acpi_integer status; /* success indicator */
|
||||
};
|
||||
struct acpi_processor_tx {
|
||||
u16 power;
|
||||
u16 performance;
|
||||
};
|
||||
|
||||
struct acpi_processor;
|
||||
struct acpi_processor_throttling {
|
||||
int state;
|
||||
unsigned int state;
|
||||
unsigned int platform_limit;
|
||||
struct acpi_pct_register control_register;
|
||||
struct acpi_pct_register status_register;
|
||||
unsigned int state_count;
|
||||
struct acpi_processor_tx_tss *states_tss;
|
||||
struct acpi_tsd_package domain_info;
|
||||
cpumask_t shared_cpu_map;
|
||||
int (*acpi_processor_get_throttling) (struct acpi_processor *pr);
|
||||
int (*acpi_processor_set_throttling) (struct acpi_processor *pr, int state);
|
||||
|
||||
u32 address;
|
||||
u8 duty_offset;
|
||||
u8 duty_width;
|
||||
int state_count;
|
||||
struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
|
||||
};
|
||||
|
||||
|
|
@ -169,6 +206,9 @@ struct acpi_processor {
|
|||
u32 id;
|
||||
u32 pblk;
|
||||
int performance_platform_limit;
|
||||
int throttling_platform_limit;
|
||||
/*0 - states 0..n-th satte available*/
|
||||
|
||||
struct acpi_processor_flags flags;
|
||||
struct acpi_processor_power power;
|
||||
struct acpi_processor_performance *performance;
|
||||
|
|
@ -270,7 +310,7 @@ static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
|
|||
|
||||
/* in processor_throttling.c */
|
||||
int acpi_processor_get_throttling_info(struct acpi_processor *pr);
|
||||
int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
|
||||
extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
|
||||
extern struct file_operations acpi_processor_throttling_fops;
|
||||
|
||||
/* in processor_idle.c */
|
||||
|
|
|
|||
Loading…
Reference in a new issue