static void pm72_tick(void)
{
int i, last_failure;
if (!started) {
started = 1;
printk(KERN_INFO "windfarm: CPUs control loops started.\n");
for (i = 0; i < nr_chips; ++i) {
if (cpu_setup_pid(i) < 0) {
failure_state = FAILURE_PERM;
set_fail_state();
break;
}
}
DBG_LOTS("cpu_all_tmax=%d.%03d\n", FIX32TOPRINT(cpu_all_tmax));
backside_setup_pid();
drives_setup_pid();
/*
* We don't have the right stuff to drive the PCI fan
* so we fix it to a default value
*/
wf_control_set(slots_fan, SLOTS_FAN_DEFAULT_PWM);
#ifdef HACKED_OVERTEMP
cpu_all_tmax = 60 << 16;
#endif
}
/* Permanent failure, bail out */
if (failure_state & FAILURE_PERM)
return;
/*
* Clear all failure bits except low overtemp which will be eventually
* cleared by the control loop itself
*/
last_failure = failure_state;
failure_state &= FAILURE_LOW_OVERTEMP;
if (cpu_pid_combined)
cpu_fans_tick_combined();
else
cpu_fans_tick_split();
backside_fan_tick();
drives_fan_tick();
DBG_LOTS(" last_failure: 0x%x, failure_state: %x\n",
last_failure, failure_state);
/* Check for failures. Any failure causes cpufreq clamping */
if (failure_state && last_failure == 0 && cpufreq_clamp)
wf_control_set_max(cpufreq_clamp);
if (failure_state == 0 && last_failure && cpufreq_clamp)
wf_control_set_min(cpufreq_clamp);
/* That's it for now, we might want to deal with other failures
* differently in the future though
*/
}
static void slots_fan_tick(void)
{
s32 temp;
int speed;
int err;
if (!slots_fan || !slots_temp || !slots_tick)
return;
if (--slots_tick > 0)
return;
slots_tick = slots_pid.param.interval;
DBG_LOTS("* slots fans tick\n");
err = wf_sensor_get(slots_temp, &temp);
if (err) {
pr_warning("wf_rm31: slots temp sensor error %d\n", err);
failure_state |= FAILURE_SENSOR;
wf_control_set_max(slots_fan);
return;
}
speed = wf_pid_run(&slots_pid, temp);
DBG_LOTS("slots PID temp=%d.%.3d speed=%d\n",
FIX32TOPRINT(temp), speed);
slots_speed = speed;
err = wf_control_set(slots_fan, speed);
if (err) {
printk(KERN_WARNING "windfarm: slots bay fan error %d\n", err);
failure_state |= FAILURE_FAN;
}
}
static void rm31_tick(void)
{
int i, last_failure;
if (!started) {
started = 1;
printk(KERN_INFO "windfarm: CPUs control loops started.\n");
for (i = 0; i < nr_chips; ++i) {
if (cpu_setup_pid(i) < 0) {
failure_state = FAILURE_PERM;
set_fail_state();
break;
}
}
DBG_LOTS("cpu_all_tmax=%d.%03d\n", FIX32TOPRINT(cpu_all_tmax));
backside_setup_pid();
slots_setup_pid();
#ifdef HACKED_OVERTEMP
cpu_all_tmax = 60 << 16;
#endif
}
/* Permanent failure, bail out */
if (failure_state & FAILURE_PERM)
return;
/*
* Clear all failure bits except low overtemp which will be eventually
* cleared by the control loop itself
*/
last_failure = failure_state;
failure_state &= FAILURE_LOW_OVERTEMP;
backside_fan_tick();
slots_fan_tick();
/* We do CPUs last because they can be clamped high by
* DIMM temperature
*/
cpu_fans_tick();
DBG_LOTS(" last_failure: 0x%x, failure_state: %x\n",
last_failure, failure_state);
/* Check for failures. Any failure causes cpufreq clamping */
if (failure_state && last_failure == 0 && cpufreq_clamp)
wf_control_set_max(cpufreq_clamp);
if (failure_state == 0 && last_failure && cpufreq_clamp)
wf_control_set_min(cpufreq_clamp);
/* That's it for now, we might want to deal with other failures
* differently in the future though
*/
}
static void cpu_fans_tick_split(void)
{
int err, cpu;
s32 intake, temp, power, t_max = 0;
DBG_LOTS("* cpu fans_tick_split()\n");
for (cpu = 0; cpu < nr_chips; ++cpu) {
struct wf_cpu_pid_state *sp = &cpu_pid[cpu];
/* Read current speed */
wf_control_get(cpu_rear_fans[cpu], &sp->target);
DBG_LOTS(" CPU%d: cur_target = %d RPM\n", cpu, sp->target);
err = read_one_cpu_vals(cpu, &temp, &power);
if (err) {
failure_state |= FAILURE_SENSOR;
cpu_max_all_fans();
return;
}
/* Keep track of highest temp */
t_max = max(t_max, temp);
/* Handle possible overtemps */
if (cpu_check_overtemp(t_max))
return;
/* Run PID */
wf_cpu_pid_run(sp, power, temp);
DBG_LOTS(" CPU%d: target = %d RPM\n", cpu, sp->target);
/* Apply result directly to exhaust fan */
err = wf_control_set(cpu_rear_fans[cpu], sp->target);
if (err) {
pr_warning("wf_pm72: Fan %s reports error %d\n",
cpu_rear_fans[cpu]->name, err);
failure_state |= FAILURE_FAN;
break;
}
/* Scale result for intake fan */
intake = (sp->target * CPU_INTAKE_SCALE) >> 16;
DBG_LOTS(" CPU%d: intake = %d RPM\n", cpu, intake);
err = wf_control_set(cpu_front_fans[cpu], intake);
if (err) {
pr_warning("wf_pm72: Fan %s reports error %d\n",
cpu_front_fans[cpu]->name, err);
failure_state |= FAILURE_FAN;
break;
}
}
}
static void backside_fan_tick(void)
{
s32 temp, dtemp;
int speed, dspeed, fan_min;
int err;
if (!backside_fan || !backside_temp || !dimms_temp || !backside_tick)
return;
if (--backside_tick > 0)
return;
backside_tick = backside_pid.param.interval;
DBG_LOTS("* backside fans tick\n");
/* Update fan speed from actual fans */
err = wf_control_get(backside_fan, &speed);
if (!err)
backside_pid.target = speed;
err = wf_sensor_get(backside_temp, &temp);
if (err) {
printk(KERN_WARNING "windfarm: U3 temp sensor error %d\n",
err);
failure_state |= FAILURE_SENSOR;
wf_control_set_max(backside_fan);
return;
}
speed = wf_pid_run(&backside_pid, temp);
DBG_LOTS("backside PID temp=%d.%.3d speed=%d\n",
FIX32TOPRINT(temp), speed);
err = wf_sensor_get(dimms_temp, &dtemp);
if (err) {
printk(KERN_WARNING "windfarm: DIMMs temp sensor error %d\n",
err);
failure_state |= FAILURE_SENSOR;
wf_control_set_max(backside_fan);
return;
}
dspeed = wf_pid_run(&dimms_pid, dtemp);
dimms_output_clamp = dspeed;
fan_min = (dspeed * 100) / 14000;
fan_min = max(fan_min, backside_param.min);
speed = max(speed, fan_min);
err = wf_control_set(backside_fan, speed);
if (err) {
printk(KERN_WARNING "windfarm: backside fan error %d\n", err);
failure_state |= FAILURE_FAN;
}
}
static void slots_fan_tick(void)
{
s32 power;
int speed;
int err;
if (!slots_fan || !slots_power)
return;
if (!slots_started) {
/* first time; initialize things */
;
wf_pid_init(&slots_pid, &slots_param);
slots_started = 1;
}
err = slots_power->ops->get_value(slots_power, &power);
if (err) {
// printk(KERN_WARNING "windfarm: slots power sensor error %d\n",
;
failure_state |= FAILURE_SENSOR;
wf_control_set_max(slots_fan);
return;
}
speed = wf_pid_run(&slots_pid, power);
DBG_LOTS("slots PID power=%d.%.3d speed=%d\n",
FIX32TOPRINT(power), speed);
err = slots_fan->ops->set_value(slots_fan, speed);
if (err) {
;
failure_state |= FAILURE_FAN;
}
}
static void pm112_tick(void)
{
int i, last_failure;
if (!started) {
started = 1;
;
for (i = 0; i < nr_cores; ++i) {
if (create_cpu_loop(i) < 0) {
failure_state = FAILURE_PERM;
set_fail_state();
break;
}
}
DBG_LOTS("cpu_all_tmax=%d.%03d\n", FIX32TOPRINT(cpu_all_tmax));
#ifdef HACKED_OVERTEMP
cpu_all_tmax = 60 << 16;
#endif
}
/* Permanent failure, bail out */
if (failure_state & FAILURE_PERM)
return;
/* Clear all failure bits except low overtemp which will be eventually
* cleared by the control loop itself
*/
last_failure = failure_state;
failure_state &= FAILURE_LOW_OVERTEMP;
cpu_fans_tick();
backside_fan_tick();
slots_fan_tick();
drive_bay_fan_tick();
DBG_LOTS("last_failure: 0x%x, failure_state: %x\n",
last_failure, failure_state);
/* Check for failures. Any failure causes cpufreq clamping */
if (failure_state && last_failure == 0 && cpufreq_clamp)
wf_control_set_max(cpufreq_clamp);
if (failure_state == 0 && last_failure && cpufreq_clamp)
wf_control_set_min(cpufreq_clamp);
/* That's it for now, we might want to deal with other failures
* differently in the future though
*/
}
static void cpu_fans_tick(void)
{
int err, cpu, i;
s32 speed, temp, power, t_max = 0;
DBG_LOTS("* cpu fans_tick_split()\n");
for (cpu = 0; cpu < nr_chips; ++cpu) {
struct wf_cpu_pid_state *sp = &cpu_pid[cpu];
/* Read current speed */
wf_control_get(cpu_fans[cpu][0], &sp->target);
err = read_one_cpu_vals(cpu, &temp, &power);
if (err) {
failure_state |= FAILURE_SENSOR;
cpu_max_all_fans();
return;
}
/* Keep track of highest temp */
t_max = max(t_max, temp);
/* Handle possible overtemps */
if (cpu_check_overtemp(t_max))
return;
/* Run PID */
wf_cpu_pid_run(sp, power, temp);
DBG_LOTS(" CPU%d: target = %d RPM\n", cpu, sp->target);
/* Apply DIMMs clamp */
speed = max(sp->target, dimms_output_clamp);
/* Apply result to all cpu fans */
for (i = 0; i < 3; i++) {
err = wf_control_set(cpu_fans[cpu][i], speed);
if (err) {
pr_warning("wf_rm31: Fan %s reports error %d\n",
cpu_fans[cpu][i]->name, err);
failure_state |= FAILURE_FAN;
}
}
}
}
static int read_one_cpu_vals(int cpu, s32 *temp, s32 *power)
{
s32 dtemp, volts, amps;
int rc;
/* Get diode temperature */
rc = wf_sensor_get(sens_cpu_temp[cpu], &dtemp);
if (rc) {
DBG(" CPU%d: temp reading error !\n", cpu);
return -EIO;
}
DBG_LOTS(" CPU%d: temp = %d.%03d\n", cpu, FIX32TOPRINT((dtemp)));
*temp = dtemp;
/* Get voltage */
rc = wf_sensor_get(sens_cpu_volts[cpu], &volts);
if (rc) {
DBG(" CPU%d, volts reading error !\n", cpu);
return -EIO;
}
DBG_LOTS(" CPU%d: volts = %d.%03d\n", cpu, FIX32TOPRINT((volts)));
/* Get current */
rc = wf_sensor_get(sens_cpu_amps[cpu], &s);
if (rc) {
DBG(" CPU%d, current reading error !\n", cpu);
return -EIO;
}
DBG_LOTS(" CPU%d: amps = %d.%03d\n", cpu, FIX32TOPRINT((amps)));
/* Calculate power */
/* Scale voltage and current raw sensor values according to fixed scales
* obtained in Darwin and calculate power from I and V
*/
*power = (((u64)volts) * ((u64)amps)) >> 16;
DBG_LOTS(" CPU%d: power = %d.%03d\n", cpu, FIX32TOPRINT((*power)));
return 0;
}
static void backside_fan_tick(void)
{
s32 temp;
int speed;
int err;
if (!backside_fan || !backside_temp || !backside_tick)
return;
if (--backside_tick > 0)
return;
backside_tick = backside_pid.param.interval;
DBG_LOTS("* backside fans tick\n");
/* Update fan speed from actual fans */
err = wf_control_get(backside_fan, &speed);
if (!err)
backside_pid.target = speed;
err = wf_sensor_get(backside_temp, &temp);
if (err) {
printk(KERN_WARNING "windfarm: U4 temp sensor error %d\n",
err);
failure_state |= FAILURE_SENSOR;
wf_control_set_max(backside_fan);
return;
}
speed = wf_pid_run(&backside_pid, temp);
DBG_LOTS("backside PID temp=%d.%.3d speed=%d\n",
FIX32TOPRINT(temp), speed);
err = wf_control_set(backside_fan, speed);
if (err) {
printk(KERN_WARNING "windfarm: backside fan error %d\n", err);
failure_state |= FAILURE_FAN;
}
}
static void drives_fan_tick(void)
{
s32 temp;
int speed;
int err;
if (!drives_fan || !drives_temp || !drives_tick)
return;
if (--drives_tick > 0)
return;
drives_tick = drives_pid.param.interval;
DBG_LOTS("* drives fans tick\n");
/* Update fan speed from actual fans */
err = wf_control_get(drives_fan, &speed);
if (!err)
drives_pid.target = speed;
err = wf_sensor_get(drives_temp, &temp);
if (err) {
pr_warning("wf_pm72: drive bay temp sensor error %d\n", err);
failure_state |= FAILURE_SENSOR;
wf_control_set_max(drives_fan);
return;
}
speed = wf_pid_run(&drives_pid, temp);
DBG_LOTS("drives PID temp=%d.%.3d speed=%d\n",
FIX32TOPRINT(temp), speed);
err = wf_control_set(drives_fan, speed);
if (err) {
printk(KERN_WARNING "windfarm: drive bay fan error %d\n", err);
failure_state |= FAILURE_FAN;
}
}
static void drive_bay_fan_tick(void)
{
s32 temp;
int speed;
int err;
if (!drive_bay_fan || !hd_temp)
return;
if (!drive_bay_tick) {
/* first time; initialize things */
;
drive_bay_prm.min = drive_bay_fan->ops->get_min(drive_bay_fan);
drive_bay_prm.max = drive_bay_fan->ops->get_max(drive_bay_fan);
wf_pid_init(&drive_bay_pid, &drive_bay_prm);
drive_bay_tick = 1;
}
if (--drive_bay_tick > 0)
return;
drive_bay_tick = drive_bay_pid.param.interval;
err = hd_temp->ops->get_value(hd_temp, &temp);
if (err) {
// printk(KERN_WARNING "windfarm: drive bay temp sensor "
;
failure_state |= FAILURE_SENSOR;
wf_control_set_max(drive_bay_fan);
return;
}
speed = wf_pid_run(&drive_bay_pid, temp);
DBG_LOTS("drive_bay PID temp=%d.%.3d speed=%d\n",
FIX32TOPRINT(temp), speed);
err = drive_bay_fan->ops->set_value(drive_bay_fan, speed);
if (err) {
;
failure_state |= FAILURE_FAN;
}
}
static void backside_fan_tick(void)
{
s32 temp;
int speed;
int err;
if (!backside_fan || !u4_temp)
return;
if (!backside_tick) {
/* first time; initialize things */
;
backside_param.min = backside_fan->ops->get_min(backside_fan);
backside_param.max = backside_fan->ops->get_max(backside_fan);
wf_pid_init(&backside_pid, &backside_param);
backside_tick = 1;
}
if (--backside_tick > 0)
return;
backside_tick = backside_pid.param.interval;
err = u4_temp->ops->get_value(u4_temp, &temp);
if (err) {
// printk(KERN_WARNING "windfarm: U4 temp sensor error %d\n",
;
failure_state |= FAILURE_SENSOR;
wf_control_set_max(backside_fan);
return;
}
speed = wf_pid_run(&backside_pid, temp);
DBG_LOTS("backside PID temp=%d.%.3d speed=%d\n",
FIX32TOPRINT(temp), speed);
err = backside_fan->ops->set_value(backside_fan, speed);
if (err) {
;
failure_state |= FAILURE_FAN;
}
}
static int cpu_check_overtemp(s32 temp)
{
int new_state = 0;
s32 t_avg, t_old;
static bool first = true;
/* First check for immediate overtemps */
if (temp >= (cpu_all_tmax + LOW_OVER_IMMEDIATE)) {
new_state |= FAILURE_LOW_OVERTEMP;
if ((failure_state & FAILURE_LOW_OVERTEMP) == 0)
printk(KERN_ERR "windfarm: Overtemp due to immediate CPU"
" temperature !\n");
}
if (temp >= (cpu_all_tmax + HIGH_OVER_IMMEDIATE)) {
new_state |= FAILURE_HIGH_OVERTEMP;
if ((failure_state & FAILURE_HIGH_OVERTEMP) == 0)
printk(KERN_ERR "windfarm: Critical overtemp due to"
" immediate CPU temperature !\n");
}
/*
* The first time around, initialize the array with the first
* temperature reading
*/
if (first) {
int i;
cpu_thist_total = 0;
for (i = 0; i < CPU_TEMP_HIST_SIZE; i++) {
cpu_thist[i] = temp;
cpu_thist_total += temp;
}
first = false;
}
/*
* We calculate a history of max temperatures and use that for the
* overtemp management
*/
t_old = cpu_thist[cpu_thist_pt];
cpu_thist[cpu_thist_pt] = temp;
cpu_thist_pt = (cpu_thist_pt + 1) % CPU_TEMP_HIST_SIZE;
cpu_thist_total -= t_old;
cpu_thist_total += temp;
t_avg = cpu_thist_total / CPU_TEMP_HIST_SIZE;
DBG_LOTS(" t_avg = %d.%03d (out: %d.%03d, in: %d.%03d)\n",
FIX32TOPRINT(t_avg), FIX32TOPRINT(t_old), FIX32TOPRINT(temp));
/* Now check for average overtemps */
if (t_avg >= (cpu_all_tmax + LOW_OVER_AVERAGE)) {
new_state |= FAILURE_LOW_OVERTEMP;
if ((failure_state & FAILURE_LOW_OVERTEMP) == 0)
printk(KERN_ERR "windfarm: Overtemp due to average CPU"
" temperature !\n");
}
if (t_avg >= (cpu_all_tmax + HIGH_OVER_AVERAGE)) {
new_state |= FAILURE_HIGH_OVERTEMP;
if ((failure_state & FAILURE_HIGH_OVERTEMP) == 0)
printk(KERN_ERR "windfarm: Critical overtemp due to"
" average CPU temperature !\n");
}
/* Now handle overtemp conditions. We don't currently use the windfarm
* overtemp handling core as it's not fully suited to the needs of those
* new machine. This will be fixed later.
*/
if (new_state) {
/* High overtemp -> immediate shutdown */
if (new_state & FAILURE_HIGH_OVERTEMP)
machine_power_off();
if ((failure_state & new_state) != new_state)
cpu_max_all_fans();
failure_state |= new_state;
} else if ((failure_state & FAILURE_LOW_OVERTEMP) &&
(temp < (cpu_all_tmax + LOW_OVER_CLEAR))) {
printk(KERN_ERR "windfarm: Overtemp condition cleared !\n");
failure_state &= ~FAILURE_LOW_OVERTEMP;
}
return failure_state & (FAILURE_LOW_OVERTEMP | FAILURE_HIGH_OVERTEMP);
}
static void cpu_fans_tick(void)
{
int err, cpu;
s32 greatest_delta = 0;
s32 temp, power, t_max = 0;
int i, t, target = 0;
struct wf_sensor *sr;
struct wf_control *ct;
struct wf_cpu_pid_state *sp;
DBG_LOTS(KERN_DEBUG);
for (cpu = 0; cpu < nr_cores; ++cpu) {
/* Get CPU core temperature */
sr = sens_cpu_temp[cpu];
err = sr->ops->get_value(sr, &temp);
if (err) {
DBG("\n");
// printk(KERN_WARNING "windfarm: CPU %d temperature "
;
failure_state |= FAILURE_SENSOR;
cpu_max_all_fans();
return;
}
/* Keep track of highest temp */
t_max = max(t_max, temp);
/* Get CPU power */
sr = sens_cpu_power[cpu];
err = sr->ops->get_value(sr, &power);
if (err) {
DBG("\n");
// printk(KERN_WARNING "windfarm: CPU %d power "
;
failure_state |= FAILURE_SENSOR;
cpu_max_all_fans();
return;
}
/* Run PID */
sp = &cpu_pid[cpu];
t = wf_cpu_pid_run(sp, power, temp);
if (cpu == 0 || sp->last_delta > greatest_delta) {
greatest_delta = sp->last_delta;
target = t;
}
DBG_LOTS("[%d] P=%d.%.3d T=%d.%.3d ",
cpu, FIX32TOPRINT(power), FIX32TOPRINT(temp));
}
DBG_LOTS("fans = %d, t_max = %d.%03d\n", target, FIX32TOPRINT(t_max));
/* Darwin limits decrease to 20 per iteration */
if (target < (cpu_last_target - 20))
target = cpu_last_target - 20;
cpu_last_target = target;
for (cpu = 0; cpu < nr_cores; ++cpu)
cpu_pid[cpu].target = target;
/* Handle possible overtemps */
if (cpu_check_overtemp(t_max))
return;
/* Set fans */
for (i = 0; i < NR_CPU_FANS; ++i) {
ct = cpu_fans[i];
if (ct == NULL)
continue;
err = ct->ops->set_value(ct, target * cpu_fan_scale[i] / 100);
if (err) {
// printk(KERN_WARNING "windfarm: fan %s reports "
;
failure_state |= FAILURE_FAN;
break;
}
}
}
static void cpu_fans_tick_combined(void)
{
s32 temp0, power0, temp1, power1, t_max = 0;
s32 temp, power, intake, pump;
struct wf_control *pump0, *pump1;
struct wf_cpu_pid_state *sp = &cpu_pid[0];
int err, cpu;
DBG_LOTS("* cpu fans_tick_combined()\n");
/* Read current speed from cpu 0 */
wf_control_get(cpu_rear_fans[0], &sp->target);
DBG_LOTS(" CPUs: cur_target = %d RPM\n", sp->target);
/* Read values for both CPUs */
err = read_one_cpu_vals(0, &temp0, &power0);
if (err) {
failure_state |= FAILURE_SENSOR;
cpu_max_all_fans();
return;
}
err = read_one_cpu_vals(1, &temp1, &power1);
if (err) {
failure_state |= FAILURE_SENSOR;
cpu_max_all_fans();
return;
}
/* Keep track of highest temp */
t_max = max(t_max, max(temp0, temp1));
/* Handle possible overtemps */
if (cpu_check_overtemp(t_max))
return;
/* Use the max temp & power of both */
temp = max(temp0, temp1);
power = max(power0, power1);
/* Run PID */
wf_cpu_pid_run(sp, power, temp);
/* Scale result for intake fan */
intake = (sp->target * CPU_INTAKE_SCALE) >> 16;
/* Same deal with pump speed */
pump0 = cpu_pumps[0];
pump1 = cpu_pumps[1];
if (!pump0) {
pump0 = pump1;
pump1 = NULL;
}
pump = (sp->target * wf_control_get_max(pump0)) /
cpu_mpu_data[0]->rmaxn_exhaust_fan;
DBG_LOTS(" CPUs: target = %d RPM\n", sp->target);
DBG_LOTS(" CPUs: intake = %d RPM\n", intake);
DBG_LOTS(" CPUs: pump = %d RPM\n", pump);
for (cpu = 0; cpu < nr_chips; cpu++) {
err = wf_control_set(cpu_rear_fans[cpu], sp->target);
if (err) {
pr_warning("wf_pm72: Fan %s reports error %d\n",
cpu_rear_fans[cpu]->name, err);
failure_state |= FAILURE_FAN;
}
err = wf_control_set(cpu_front_fans[cpu], intake);
if (err) {
pr_warning("wf_pm72: Fan %s reports error %d\n",
cpu_front_fans[cpu]->name, err);
failure_state |= FAILURE_FAN;
}
err = 0;
if (cpu_pumps[cpu])
err = wf_control_set(cpu_pumps[cpu], pump);
if (err) {
pr_warning("wf_pm72: Pump %s reports error %d\n",
cpu_pumps[cpu]->name, err);
failure_state |= FAILURE_FAN;
}
}
}