/*
* Re-evaluate the _CST object when we are notified that it changed.
*/
static void
acpi_cst_notify(device_t dev)
{
struct acpi_cst_softc *sc = device_get_softc(dev);
KASSERT(curthread->td_type != TD_TYPE_NETISR,
("notify in netisr%d", mycpuid));
lwkt_serialize_enter(&acpi_cst_slize);
/* Update the list of Cx states. */
acpi_cst_cx_reprobe_cst(sc);
acpi_cst_support_list(sc);
/* Update the new lowest useable Cx state for all CPUs. */
acpi_cst_global_cx_count();
/*
* Fix up the lowest Cx being used
*/
if (acpi_cst_cx_lowest_req < acpi_cst_cx_count)
acpi_cst_cx_lowest = acpi_cst_cx_lowest_req;
if (acpi_cst_cx_lowest > acpi_cst_cx_count - 1)
acpi_cst_cx_lowest = acpi_cst_cx_count - 1;
lwkt_serialize_exit(&acpi_cst_slize);
}
/*
* Re-evaluate the _CST object when we are notified that it changed.
*/
static void
acpi_cst_notify(device_t dev)
{
struct acpi_cst_softc *sc = device_get_softc(dev);
cpuhelper_assert(mycpuid, false);
lwkt_serialize_enter(&acpi_cst_slize);
/* Update the list of Cx states. */
acpi_cst_cx_reprobe_cst(sc);
acpi_cst_support_list(sc);
/* Update the new lowest useable Cx state for all CPUs. */
acpi_cst_global_cx_count();
/*
* Fix up the lowest Cx being used
*/
if (acpi_cst_cx_lowest_req < acpi_cst_cx_count)
acpi_cst_cx_lowest = acpi_cst_cx_lowest_req;
if (acpi_cst_cx_lowest > acpi_cst_cx_count - 1)
acpi_cst_cx_lowest = acpi_cst_cx_count - 1;
lwkt_serialize_exit(&acpi_cst_slize);
}
/*
* Call this *after* all CPUs Cx states have been attached.
*/
static void
acpi_cst_postattach(void *arg)
{
struct acpi_cst_softc *sc;
int i;
/* Get set of Cx state devices */
devclass_get_devices(acpi_cst_devclass, &acpi_cst_devices,
&acpi_cst_ndevices);
/*
* Setup any quirks that might necessary now that we have probed
* all the CPUs' Cx states.
*/
acpi_cst_set_quirks();
if (acpi_cst_use_fadt) {
/*
* We are using Cx mode from FADT, probe for available Cx states
* for all processors.
*/
for (i = 0; i < acpi_cst_ndevices; i++) {
sc = device_get_softc(acpi_cst_devices[i]);
acpi_cst_cx_probe_fadt(sc);
}
} else {
/*
* We are using _CST mode, remove C3 state if necessary.
*
* As we now know for sure that we will be using _CST mode
* install our notify handler.
*/
for (i = 0; i < acpi_cst_ndevices; i++) {
sc = device_get_softc(acpi_cst_devices[i]);
if (acpi_cst_quirks & ACPI_CST_QUIRK_NO_C3) {
/* Free part of unused resources */
acpi_cst_free_resource(sc, sc->cst_non_c3 + 1);
sc->cst_cx_count = sc->cst_non_c3 + 1;
}
sc->cst_parent->cpu_cst_notify = acpi_cst_notify;
}
}
acpi_cst_global_cx_count();
/* Perform Cx final initialization. */
for (i = 0; i < acpi_cst_ndevices; i++) {
sc = device_get_softc(acpi_cst_devices[i]);
acpi_cst_startup(sc);
if (sc->cst_parent->glob_sysctl_tree != NULL) {
struct acpi_cpu_softc *cpu = sc->cst_parent;
/* Add a sysctl handler to handle global Cx lowest setting */
SYSCTL_ADD_PROC(&cpu->glob_sysctl_ctx,
SYSCTL_CHILDREN(cpu->glob_sysctl_tree),
OID_AUTO, "cx_lowest",
CTLTYPE_STRING | CTLFLAG_RW, NULL, 0,
acpi_cst_global_lowest_sysctl, "A",
"Requested global lowest Cx sleep state");
SYSCTL_ADD_PROC(&cpu->glob_sysctl_ctx,
SYSCTL_CHILDREN(cpu->glob_sysctl_tree),
OID_AUTO, "cx_lowest_use",
CTLTYPE_STRING | CTLFLAG_RD, NULL, 0,
acpi_cst_global_lowest_use_sysctl, "A",
"Global lowest Cx sleep state to use");
}
}
/* Take over idling from cpu_idle_default(). */
acpi_cst_cx_lowest = 0;
acpi_cst_cx_lowest_req = 0;
acpi_cst_disable_idle = FALSE;
cpu_sfence();
cpu_idle_hook = acpi_cst_idle;
}
