1 /*-
2  * Copyright (c) 2003-2005 Nate Lawson (SDG)
65 /* Offsets in struct cf_setting array for storing driver-specific values. */
74 	struct resource	*perf_ctrl;	/* Set new performance state. */
83 	int		 info_only;	/* Can we set new states? */
95 static void	acpi_perf_identify(driver_t *driver, device_t parent);
101 		    struct cf_setting *set);
107 static int	acpi_px_set(device_t dev, const struct cf_setting *set);
108 static int	acpi_px_get(device_t dev, struct cf_setting *set);
139 acpi_perf_identify(driver_t *driver, device_t parent)  in acpi_perf_identify()  argument
145 	if (device_find_child(parent, "acpi_perf", DEVICE_UNIT_ANY) != NULL)  in acpi_perf_identify()
149 	handle = acpi_get_handle(parent);  in acpi_perf_identify()
161 	if ((dev = BUS_ADD_CHILD(parent, 0, "acpi_perf",  in acpi_perf_identify()
162 	    device_get_unit(parent))) != NULL)  in acpi_perf_identify()
165 		device_printf(parent, "add acpi_perf child failed\n");  in acpi_perf_identify()
218 	sc->dev = dev;  in acpi_perf_attach()
219 	sc->handle = acpi_get_handle(dev);  in acpi_perf_attach()
220 	sc->px_max_avail = 0;  in acpi_perf_attach()
221 	sc->px_curr_state = CPUFREQ_VAL_UNKNOWN;  in acpi_perf_attach()
225 	if (!sc->info_only)  in acpi_perf_attach()
255 	status = AcpiEvaluateObject(sc->handle, "_PSS", NULL, &buf);  in acpi_perf_evaluate()
264 	sc->px_count = pkg->Package.Count;  in acpi_perf_evaluate()
266 	sc->px_states = malloc(sc->px_count * sizeof(struct acpi_px),  in acpi_perf_evaluate()
275 	for (i = 0; i < sc->px_count; i++) {  in acpi_perf_evaluate()
276 		res = &pkg->Package.Elements[i];  in acpi_perf_evaluate()
286 		p = &sc->px_states[count].core_freq;  in acpi_perf_evaluate()
294 		if (sc->px_states[count].core_freq == 0 ||  in acpi_perf_evaluate()
295 		    sc->px_states[count].core_freq == 9999 ||  in acpi_perf_evaluate()
296 		    sc->px_states[count].core_freq == 0x9999 ||  in acpi_perf_evaluate()
297 		    sc->px_states[count].core_freq >= 0xffff)  in acpi_perf_evaluate()
302 		    sc->px_states[count - 1].core_freq ==  in acpi_perf_evaluate()
303 			sc->px_states[count].core_freq)  in acpi_perf_evaluate()
308 	sc->px_count = count;  in acpi_perf_evaluate()
318 	status = AcpiEvaluateObject(sc->handle, "_PCT", NULL, &buf);  in acpi_perf_evaluate()
329 	error = acpi_PkgGas(sc->dev, pkg, 0, &sc->perf_ctrl_type, &sc->px_rid,  in acpi_perf_evaluate()
330 	    &sc->perf_ctrl, 0);  in acpi_perf_evaluate()
334 		 * info, we can't get or set new settings.  in acpi_perf_evaluate()
337 			sc->info_only = TRUE;  in acpi_perf_evaluate()
343 	sc->px_rid++;  in acpi_perf_evaluate()
345 	error = acpi_PkgGas(sc->dev, pkg, 1, &sc->perf_sts_type, &sc->px_rid,  in acpi_perf_evaluate()
346 	    &sc->perf_status, 0);  in acpi_perf_evaluate()
349 			sc->info_only = TRUE;  in acpi_perf_evaluate()
355 	sc->px_rid++;  in acpi_perf_evaluate()
359 	AcpiInstallNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,  in acpi_perf_evaluate()
365 		if (sc->px_states) {  in acpi_perf_evaluate()
366 			free(sc->px_states, M_ACPIPERF);  in acpi_perf_evaluate()
367 			sc->px_states = NULL;  in acpi_perf_evaluate()
369 		if (sc->perf_ctrl) {  in acpi_perf_evaluate()
370 			bus_release_resource(sc->dev, sc->perf_ctrl_type, 0,  in acpi_perf_evaluate()
371 			    sc->perf_ctrl);  in acpi_perf_evaluate()
372 			bus_delete_resource(sc->dev, sc->perf_ctrl_type, 0);  in acpi_perf_evaluate()
373 			sc->perf_ctrl = NULL;  in acpi_perf_evaluate()
375 		if (sc->perf_status) {  in acpi_perf_evaluate()
376 			bus_release_resource(sc->dev, sc->perf_sts_type, 1,  in acpi_perf_evaluate()
377 			    sc->perf_status);  in acpi_perf_evaluate()
378 			bus_delete_resource(sc->dev, sc->perf_sts_type, 1);  in acpi_perf_evaluate()
379 			sc->perf_status = NULL;  in acpi_perf_evaluate()
381 		sc->px_rid = 0;  in acpi_perf_evaluate()
382 		sc->px_count = 0;  in acpi_perf_evaluate()
416  * Find the highest currently-supported performance state.
424 	struct cf_setting set;  in acpi_px_available()  local
426 	status = acpi_GetInteger(sc->handle, "_PPC", &sc->px_max_avail);  in acpi_px_available()
428 	/* If the old state is too high, set current state to the new max. */  in acpi_px_available()
430 		if (sc->px_curr_state != CPUFREQ_VAL_UNKNOWN &&  in acpi_px_available()
431 		    sc->px_curr_state > sc->px_max_avail) {  in acpi_px_available()
432 			acpi_px_to_set(sc->dev,  in acpi_px_available()
433 			    &sc->px_states[sc->px_max_avail], &set);  in acpi_px_available()
434 			acpi_px_set(sc->dev, &set);  in acpi_px_available()
437 		sc->px_max_avail = 0;  in acpi_px_available()
441 acpi_px_to_set(device_t dev, struct acpi_px *px, struct cf_setting *set)  in acpi_px_to_set()  argument
444 	if (px == NULL || set == NULL)  in acpi_px_to_set()
447 	set->freq = px->core_freq;  in acpi_px_to_set()
448 	set->power = px->power;  in acpi_px_to_set()
450 	set->lat = px->trans_lat;  in acpi_px_to_set()
451 	set->volts = CPUFREQ_VAL_UNKNOWN;  in acpi_px_to_set()
452 	set->dev = dev;  in acpi_px_to_set()
453 	set->spec[PX_SPEC_CONTROL] = px->ctrl_val;  in acpi_px_to_set()
454 	set->spec[PX_SPEC_STATUS] = px->sts_val;  in acpi_px_to_set()
468 	if (*count < sc->px_count - sc->px_max_avail)  in acpi_px_settings()
473 	for (x = sc->px_max_avail; x < sc->px_count; x++, y++)  in acpi_px_settings()
474 		acpi_px_to_set(dev, &sc->px_states[x], &sets[y]);  in acpi_px_settings()
475 	*count = sc->px_count - sc->px_max_avail;  in acpi_px_settings()
481 acpi_px_set(device_t dev, const struct cf_setting *set)  in acpi_px_set()  argument
486 	if (set == NULL)  in acpi_px_set()
490 	/* If we can't set new states, return immediately. */  in acpi_px_set()
491 	if (sc->info_only)  in acpi_px_set()
495 	for (i = sc->px_max_avail; i < sc->px_count; i++) {  in acpi_px_set()
496 		if (CPUFREQ_CMP(set->freq, sc->px_states[i].core_freq))  in acpi_px_set()
499 	if (i == sc->px_count)  in acpi_px_set()
503 	PX_SET_REG(sc->perf_ctrl, sc->px_states[i].ctrl_val);  in acpi_px_set()
510 	sts_val = sc->px_states[i].sts_val;  in acpi_px_set()
512 		status = PX_GET_REG(sc->perf_status);  in acpi_px_set()
517 		 * appears some systems (IBM R32) expect byte-wide access  in acpi_px_set()
518 		 * even though the standard says the register is 32-bit.  in acpi_px_set()
527 		    sc->px_states[i].core_freq);  in acpi_px_set()
530 	sc->px_curr_state = i;  in acpi_px_set()
536 acpi_px_get(device_t dev, struct cf_setting *set)  in acpi_px_get()  argument
539 	uint64_t rate;  in acpi_px_get()  local
543 	if (set == NULL)  in acpi_px_get()
548 	if (sc->info_only)  in acpi_px_get()
551 	/* If we've set the rate before, use the cached value. */  in acpi_px_get()
552 	if (sc->px_curr_state != CPUFREQ_VAL_UNKNOWN) {  in acpi_px_get()
553 		acpi_px_to_set(dev, &sc->px_states[sc->px_curr_state], set);  in acpi_px_get()
561 	cpu_est_clockrate(pc->pc_cpuid, &rate);  in acpi_px_get()
562 	rate /= 1000000;  in acpi_px_get()
563 	for (i = 0; i < sc->px_count; i++) {  in acpi_px_get()
564 		if (CPUFREQ_CMP(sc->px_states[i].core_freq, rate)) {  in acpi_px_get()
565 			sc->px_curr_state = i;  in acpi_px_get()
566 			acpi_px_to_set(dev, &sc->px_states[i], set);  in acpi_px_get()
572 	if (i == sc->px_count) {  in acpi_px_get()
573 		sc->px_curr_state = CPUFREQ_VAL_UNKNOWN;  in acpi_px_get()
574 		set->freq = CPUFREQ_VAL_UNKNOWN;  in acpi_px_get()
590 	if (sc->info_only)  in acpi_px_type()