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sys/powerpc/powermac/powermac_thermal.c
| Show All 36 Lines | |||||
| #include <sys/kthread.h> | #include <sys/kthread.h> | ||||
| #include <sys/malloc.h> | #include <sys/malloc.h> | ||||
| #include <sys/reboot.h> | #include <sys/reboot.h> | ||||
| #include <sys/sysctl.h> | #include <sys/sysctl.h> | ||||
| #include <sys/queue.h> | #include <sys/queue.h> | ||||
| #include "powermac_thermal.h" | #include "powermac_thermal.h" | ||||
| /* A 10 second timer for spinning down fans. */ | |||||
| #define FAN_HYSTERESIS_TIMER 10 | |||||
| static void fan_management_proc(void); | static void fan_management_proc(void); | ||||
| static void pmac_therm_manage_fans(void); | static void pmac_therm_manage_fans(void); | ||||
| static struct proc *pmac_them_proc; | static struct proc *pmac_them_proc; | ||||
| static int enable_pmac_thermal = 1; | static int enable_pmac_thermal = 1; | ||||
| static struct kproc_desc pmac_therm_kp = { | static struct kproc_desc pmac_therm_kp = { | ||||
| "pmac_thermal", | "pmac_thermal", | ||||
| fan_management_proc, | fan_management_proc, | ||||
| &pmac_them_proc | &pmac_them_proc | ||||
| }; | }; | ||||
| SYSINIT(pmac_therm_setup, SI_SUB_KTHREAD_IDLE, SI_ORDER_ANY, kproc_start, | SYSINIT(pmac_therm_setup, SI_SUB_KTHREAD_IDLE, SI_ORDER_ANY, kproc_start, | ||||
| &pmac_therm_kp); | &pmac_therm_kp); | ||||
| SYSCTL_INT(_machdep, OID_AUTO, manage_fans, CTLFLAG_RW | CTLFLAG_TUN, | SYSCTL_INT(_machdep, OID_AUTO, manage_fans, CTLFLAG_RW | CTLFLAG_TUN, | ||||
| &enable_pmac_thermal, 1, "Enable automatic fan management"); | &enable_pmac_thermal, 1, "Enable automatic fan management"); | ||||
| static MALLOC_DEFINE(M_PMACTHERM, "pmactherm", "Powermac Thermal Management"); | static MALLOC_DEFINE(M_PMACTHERM, "pmactherm", "Powermac Thermal Management"); | ||||
| struct pmac_fan_le { | struct pmac_fan_le { | ||||
| struct pmac_fan *fan; | struct pmac_fan *fan; | ||||
| int last_val; | int last_val; | ||||
| int timer; | |||||
| SLIST_ENTRY(pmac_fan_le) entries; | SLIST_ENTRY(pmac_fan_le) entries; | ||||
| }; | }; | ||||
| struct pmac_sens_le { | struct pmac_sens_le { | ||||
| struct pmac_therm *sensor; | struct pmac_therm *sensor; | ||||
| int last_val; | int last_val; | ||||
| #define MAX_CRITICAL_COUNT 6 | #define MAX_CRITICAL_COUNT 6 | ||||
| int critical_count; | int critical_count; | ||||
| SLIST_ENTRY(pmac_sens_le) entries; | SLIST_ENTRY(pmac_sens_le) entries; | ||||
| Show All 16 Lines | |||||
| } | } | ||||
| static void | static void | ||||
| pmac_therm_manage_fans(void) | pmac_therm_manage_fans(void) | ||||
| { | { | ||||
| struct pmac_sens_le *sensor; | struct pmac_sens_le *sensor; | ||||
| struct pmac_fan_le *fan; | struct pmac_fan_le *fan; | ||||
| int average_excess, max_excess_zone, frac_excess; | int average_excess, max_excess_zone, frac_excess; | ||||
| int fan_speed; | |||||
| int nsens, nsens_zone; | int nsens, nsens_zone; | ||||
| int temp; | int temp; | ||||
| if (!enable_pmac_thermal) | if (!enable_pmac_thermal) | ||||
| return; | return; | ||||
| /* Read all the sensors */ | /* Read all the sensors */ | ||||
| SLIST_FOREACH(sensor, &sensors, entries) { | SLIST_FOREACH(sensor, &sensors, entries) { | ||||
| Show All 26 Lines | SLIST_FOREACH(sensor, &sensors, entries) { | ||||
| } | } | ||||
| } | } | ||||
| /* Set all the fans */ | /* Set all the fans */ | ||||
| SLIST_FOREACH(fan, &fans, entries) { | SLIST_FOREACH(fan, &fans, entries) { | ||||
| nsens = nsens_zone = 0; | nsens = nsens_zone = 0; | ||||
| average_excess = max_excess_zone = 0; | average_excess = max_excess_zone = 0; | ||||
| SLIST_FOREACH(sensor, &sensors, entries) { | SLIST_FOREACH(sensor, &sensors, entries) { | ||||
| frac_excess = (sensor->last_val - | temp = imin(sensor->last_val, | ||||
| sensor->sensor->max_temp); | |||||
| frac_excess = (temp - | |||||
| sensor->sensor->target_temp)*100 / | sensor->sensor->target_temp)*100 / | ||||
| (sensor->sensor->max_temp - | (sensor->sensor->max_temp - temp + 1); | ||||
| sensor->sensor->target_temp); | |||||
| if (frac_excess < 0) | if (frac_excess < 0) | ||||
| frac_excess = 0; | frac_excess = 0; | ||||
| if (sensor->sensor->zone == fan->fan->zone) { | if (sensor->sensor->zone == fan->fan->zone) { | ||||
| max_excess_zone = imax(max_excess_zone, | max_excess_zone = imax(max_excess_zone, | ||||
| frac_excess); | frac_excess); | ||||
| nsens_zone++; | nsens_zone++; | ||||
| } | } | ||||
| average_excess += frac_excess; | average_excess += frac_excess; | ||||
| Show All 9 Lines | if (nsens == 0) { | ||||
| fan->fan->set(fan->fan, fan->fan->default_rpm); | fan->fan->set(fan->fan, fan->fan->default_rpm); | ||||
| continue; | continue; | ||||
| } | } | ||||
| /* | /* | ||||
| * Scale the fan linearly in the max temperature in its | * Scale the fan linearly in the max temperature in its | ||||
| * thermal zone. | * thermal zone. | ||||
| */ | */ | ||||
| fan->fan->set(fan->fan, max_excess_zone * | max_excess_zone = imin(max_excess_zone, 100); | ||||
| fan_speed = max_excess_zone * | |||||
| (fan->fan->max_rpm - fan->fan->min_rpm)/100 + | (fan->fan->max_rpm - fan->fan->min_rpm)/100 + | ||||
| fan->fan->min_rpm); | fan->fan->min_rpm; | ||||
| if (fan_speed >= fan->last_val) { | |||||
| fan->timer = FAN_HYSTERESIS_TIMER; | |||||
| fan->last_val = fan_speed; | |||||
| } else { | |||||
| fan->timer--; | |||||
| if (fan->timer == 0) { | |||||
| fan->last_val = fan_speed; | |||||
| fan->timer = FAN_HYSTERESIS_TIMER; | |||||
| } | |||||
| } | |||||
| fan->fan->set(fan->fan, fan->last_val); | |||||
| } | } | ||||
| } | } | ||||
| void | void | ||||
| pmac_thermal_fan_register(struct pmac_fan *fan) | pmac_thermal_fan_register(struct pmac_fan *fan) | ||||
| { | { | ||||
| struct pmac_fan_le *list_entry; | struct pmac_fan_le *list_entry; | ||||
| Show All 21 Lines | |||||