/*
* 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);
}
static void
acpi_cst_startup(struct acpi_cst_softc *sc)
{
struct acpi_cpu_softc *cpu = sc->cst_parent;
int i, bm_rld_done = 0;
for (i = 0; i < sc->cst_cx_count; ++i) {
struct acpi_cst_cx *cx = &sc->cst_cx_states[i];
int error;
/* If there are C3(+) states, always enable bus master wakeup */
if (cx->type >= ACPI_STATE_C3 && !bm_rld_done &&
(acpi_cst_quirks & ACPI_CST_QUIRK_NO_BM) == 0) {
acpi_cst_c3_bm_rld(sc);
bm_rld_done = 1;
}
/* Redo the Cx setup, since quirks have been changed */
error = acpi_cst_cx_setup(cx);
if (error)
panic("C%d startup setup failed: %d", i + 1, error);
}
acpi_cst_support_list(sc);
SYSCTL_ADD_STRING(&cpu->pcpu_sysctl_ctx,
SYSCTL_CHILDREN(cpu->pcpu_sysctl_tree),
OID_AUTO, "cx_supported", CTLFLAG_RD,
sc->cst_cx_supported, 0,
"Cx/microsecond values for supported Cx states");
SYSCTL_ADD_PROC(&cpu->pcpu_sysctl_ctx,
SYSCTL_CHILDREN(cpu->pcpu_sysctl_tree),
OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW,
(void *)sc, 0, acpi_cst_lowest_sysctl, "A",
"requested lowest Cx sleep state");
SYSCTL_ADD_PROC(&cpu->pcpu_sysctl_ctx,
SYSCTL_CHILDREN(cpu->pcpu_sysctl_tree),
OID_AUTO, "cx_lowest_use", CTLTYPE_STRING | CTLFLAG_RD,
(void *)sc, 0, acpi_cst_lowest_use_sysctl, "A",
"lowest Cx sleep state to use");
SYSCTL_ADD_PROC(&cpu->pcpu_sysctl_ctx,
SYSCTL_CHILDREN(cpu->pcpu_sysctl_tree),
OID_AUTO, "cx_usage", CTLTYPE_STRING | CTLFLAG_RD,
(void *)sc, 0, acpi_cst_usage_sysctl, "A",
"percent usage for each Cx state");
#ifdef notyet
/* Signal platform that we can handle _CST notification. */
if (!acpi_cst_use_fadt && acpi_cst_ctrl != 0) {
ACPI_LOCK(acpi);
AcpiOsWritePort(acpi_cst_smi_cmd, acpi_cst_ctrl, 8);
ACPI_UNLOCK(acpi);
}
#endif
}
