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 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 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
*/
}
/* Implementation... */
static int cpu_setup_pid(int cpu)
{
struct wf_cpu_pid_param pid;
const struct mpu_data *mpu = cpu_mpu_data[cpu];
s32 tmax, ttarget, ptarget;
int fmin, fmax, hsize;
/* Get PID params from the appropriate MPU EEPROM */
tmax = mpu->tmax << 16;
ttarget = mpu->ttarget << 16;
ptarget = ((s32)(mpu->pmaxh - mpu->padjmax)) << 16;
DBG("wf_72: CPU%d ttarget = %d.%03d, tmax = %d.%03d\n",
cpu, FIX32TOPRINT(ttarget), FIX32TOPRINT(tmax));
/* We keep a global tmax for overtemp calculations */
if (tmax < cpu_all_tmax)
cpu_all_tmax = tmax;
/* Set PID min/max by using the rear fan min/max */
fmin = wf_control_get_min(cpu_fans[cpu][0]);
fmax = wf_control_get_max(cpu_fans[cpu][0]);
DBG("wf_72: CPU%d max RPM range = [%d..%d]\n", cpu, fmin, fmax);
/* History size */
hsize = min_t(int, mpu->tguardband, WF_PID_MAX_HISTORY);
DBG("wf_72: CPU%d history size = %d\n", cpu, hsize);
/* Initialize PID loop */
pid.interval = 1; /* seconds */
pid.history_len = hsize;
pid.gd = mpu->pid_gd;
pid.gp = mpu->pid_gp;
pid.gr = mpu->pid_gr;
pid.tmax = tmax;
pid.ttarget = ttarget;
pid.pmaxadj = ptarget;
pid.min = fmin;
pid.max = fmax;
wf_cpu_pid_init(&cpu_pid[cpu], &pid);
cpu_pid[cpu].target = 4000;
return 0;
}
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 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, 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;
}
}
/*
* CPUs fans control loop
*/
static void do_monitor_cpu(struct cpu_pid_state *state)
{
s32 temp, voltage, current_a, power, power_target;
s32 integral, derivative, proportional, adj_in_target, sval;
s64 integ_p, deriv_p, prop_p, sum;
int i, intake, rc;
DBG("cpu %d:\n", state->index);
/* Read current fan status */
if (state->index == 0)
rc = get_rpm_fan(CPUA_EXHAUST_FAN_RPM_ID, !RPM_PID_USE_ACTUAL_SPEED);
else
rc = get_rpm_fan(CPUB_EXHAUST_FAN_RPM_ID, !RPM_PID_USE_ACTUAL_SPEED);
if (rc < 0) {
printk(KERN_WARNING "Error %d reading CPU %d exhaust fan !\n",
rc, state->index);
/* XXX What do we do now ? */
} else
state->rpm = rc;
DBG(" current rpm: %d\n", state->rpm);
/* Get some sensor readings and scale it */
temp = read_smon_adc(state, 1);
if (temp == -1) {
state->overtemp++;
return;
}
voltage = read_smon_adc(state, 3);
current_a = read_smon_adc(state, 4);
/* Fixup temperature according to diode calibration
*/
DBG(" temp raw: %04x, m_diode: %04x, b_diode: %04x\n",
temp, state->mpu.mdiode, state->mpu.bdiode);
temp = ((s32)temp * (s32)state->mpu.mdiode + ((s32)state->mpu.bdiode << 12)) >> 2;
state->last_temp = temp;
DBG(" temp: %d.%03d\n", FIX32TOPRINT(temp));
/* Check tmax, increment overtemp if we are there. At tmax+8, we go
* full blown immediately and try to trigger a shutdown
*/
if (temp >= ((state->mpu.tmax + 8) << 16)) {
printk(KERN_WARNING "Warning ! CPU %d temperature way above maximum"
" (%d) !\n",
state->index, temp >> 16);
state->overtemp = CPU_MAX_OVERTEMP;
} else if (temp > (state->mpu.tmax << 16))
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 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 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 wf_smu_cpu_fans_tick(struct wf_smu_cpu_fans_state *st)
{
s32 new_setpoint, temp, power;
int rc;
if (--st->ticks != 0) {
if (wf_smu_readjust)
goto readjust;
return;
}
st->ticks = WF_SMU_CPU_FANS_INTERVAL;
rc = sensor_cpu_temp->ops->get_value(sensor_cpu_temp, &temp);
if (rc) {
printk(KERN_WARNING "windfarm: CPU temp sensor error %d\n",
rc);
wf_smu_failure_state |= FAILURE_SENSOR;
return;
}
rc = sensor_cpu_power->ops->get_value(sensor_cpu_power, &power);
if (rc) {
printk(KERN_WARNING "windfarm: CPU power sensor error %d\n",
rc);
wf_smu_failure_state |= FAILURE_SENSOR;
return;
}
DBG("wf_smu: CPU Fans tick ! CPU temp: %d.%03d, power: %d.%03d\n",
FIX32TOPRINT(temp), FIX32TOPRINT(power));
#ifdef HACKED_OVERTEMP
if (temp > 0x4a0000)
wf_smu_failure_state |= FAILURE_OVERTEMP;
#else
if (temp > st->pid.param.tmax)
wf_smu_failure_state |= FAILURE_OVERTEMP;
#endif
new_setpoint = wf_cpu_pid_run(&st->pid, power, temp);
DBG("wf_smu: new_setpoint: %d RPM\n", (int)new_setpoint);
if (st->cpu_setpoint == new_setpoint)
return;
st->cpu_setpoint = new_setpoint;
readjust:
if (fan_cpu_main && wf_smu_failure_state == 0) {
rc = fan_cpu_main->ops->set_value(fan_cpu_main,
st->cpu_setpoint);
if (rc) {
printk(KERN_WARNING "windfarm: CPU main fan"
" error %d\n", rc);
wf_smu_failure_state |= FAILURE_FAN;
}
}
if (fan_cpu_second && wf_smu_failure_state == 0) {
rc = fan_cpu_second->ops->set_value(fan_cpu_second,
st->cpu_setpoint);
if (rc) {
printk(KERN_WARNING "windfarm: CPU second fan"
" error %d\n", rc);
wf_smu_failure_state |= FAILURE_FAN;
}
}
if (fan_cpu_third && wf_smu_failure_state == 0) {
rc = fan_cpu_main->ops->set_value(fan_cpu_third,
st->cpu_setpoint);
if (rc) {
printk(KERN_WARNING "windfarm: CPU third fan"
" error %d\n", rc);
wf_smu_failure_state |= FAILURE_FAN;
}
}
}
static void wf_smu_create_cpu_fans(void)
{
struct wf_cpu_pid_param pid_param;
const struct smu_sdbp_header *hdr;
struct smu_sdbp_cpupiddata *piddata;
struct smu_sdbp_fvt *fvt;
s32 tmax, tdelta, maxpow, powadj;
/* First, locate the PID params in SMU SBD */
hdr = smu_get_sdb_partition(SMU_SDB_CPUPIDDATA_ID, NULL);
if (hdr == 0) {
printk(KERN_WARNING "windfarm: CPU PID fan config not found "
"max fan speed\n");
goto fail;
}
piddata = (struct smu_sdbp_cpupiddata *)&hdr[1];
/* Get the FVT params for operating point 0 (the only supported one
* for now) in order to get tmax
*/
hdr = smu_get_sdb_partition(SMU_SDB_FVT_ID, NULL);
if (hdr) {
fvt = (struct smu_sdbp_fvt *)&hdr[1];
tmax = ((s32)fvt->maxtemp) << 16;
} else
tmax = 0x5e0000; /* 94 degree default */
/* Alloc & initialize state */
wf_smu_cpu_fans = kmalloc(sizeof(struct wf_smu_cpu_fans_state),
GFP_KERNEL);
if (wf_smu_cpu_fans == NULL)
goto fail;
wf_smu_cpu_fans->ticks = 1;
/* Fill PID params */
pid_param.interval = WF_SMU_CPU_FANS_INTERVAL;
pid_param.history_len = piddata->history_len;
if (pid_param.history_len > WF_CPU_PID_MAX_HISTORY) {
printk(KERN_WARNING "windfarm: History size overflow on "
"CPU control loop (%d)\n", piddata->history_len);
pid_param.history_len = WF_CPU_PID_MAX_HISTORY;
}
pid_param.gd = piddata->gd;
pid_param.gp = piddata->gp;
pid_param.gr = piddata->gr / pid_param.history_len;
tdelta = ((s32)piddata->target_temp_delta) << 16;
maxpow = ((s32)piddata->max_power) << 16;
powadj = ((s32)piddata->power_adj) << 16;
pid_param.tmax = tmax;
pid_param.ttarget = tmax - tdelta;
pid_param.pmaxadj = maxpow - powadj;
pid_param.min = fan_cpu_main->ops->get_min(fan_cpu_main);
pid_param.max = fan_cpu_main->ops->get_max(fan_cpu_main);
wf_cpu_pid_init(&wf_smu_cpu_fans->pid, &pid_param);
DBG("wf: CPU Fan control initialized.\n");
DBG(" ttarged=%d.%03d, tmax=%d.%03d, min=%d RPM, max=%d RPM\n",
FIX32TOPRINT(pid_param.ttarget), FIX32TOPRINT(pid_param.tmax),
pid_param.min, pid_param.max);
return;
fail:
printk(KERN_WARNING "windfarm: CPU fan config not found\n"
"for this machine model, max fan speed\n");
if (cpufreq_clamp)
wf_control_set_max(cpufreq_clamp);
if (fan_cpu_main)
wf_control_set_max(fan_cpu_main);
}
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 wf_smu_create_drive_fans(void)
{
struct wf_pid_param param = {
.interval = 5,
.history_len = 2,
.gd = 0x01e00000,
.gp = 0x00500000,
.gr = 0x00000000,
.itarget = 0x00200000,
};
/* Alloc & initialize state */
wf_smu_drive_fans = kmalloc(sizeof(struct wf_smu_drive_fans_state),
GFP_KERNEL);
if (wf_smu_drive_fans == NULL) {
printk(KERN_WARNING "windfarm: Memory allocation error"
" max fan speed\n");
goto fail;
}
wf_smu_drive_fans->ticks = 1;
/* Fill PID params */
param.additive = (fan_hd->type == WF_CONTROL_RPM_FAN);
param.min = fan_hd->ops->get_min(fan_hd);
param.max = fan_hd->ops->get_max(fan_hd);
wf_pid_init(&wf_smu_drive_fans->pid, ¶m);
DBG("wf: Drive Fan control initialized.\n");
DBG(" itarged=%d.%03d, min=%d RPM, max=%d RPM\n",
FIX32TOPRINT(param.itarget), param.min, param.max);
return;
fail:
if (fan_hd)
wf_control_set_max(fan_hd);
}
static void wf_smu_drive_fans_tick(struct wf_smu_drive_fans_state *st)
{
s32 new_setpoint, temp;
int rc;
if (--st->ticks != 0) {
if (wf_smu_readjust)
goto readjust;
return;
}
st->ticks = st->pid.param.interval;
rc = sensor_hd_temp->ops->get_value(sensor_hd_temp, &temp);
if (rc) {
printk(KERN_WARNING "windfarm: HD temp sensor error %d\n",
rc);
wf_smu_failure_state |= FAILURE_SENSOR;
return;
}
DBG("wf_smu: Drive Fans tick ! HD temp: %d.%03d\n",
FIX32TOPRINT(temp));
if (temp > (st->pid.param.itarget + 0x50000))
wf_smu_failure_state |= FAILURE_OVERTEMP;
new_setpoint = wf_pid_run(&st->pid, temp);
DBG("wf_smu: new_setpoint: %d\n", (int)new_setpoint);
if (st->setpoint == new_setpoint)
return;
st->setpoint = new_setpoint;
readjust:
if (fan_hd && wf_smu_failure_state == 0) {
rc = fan_hd->ops->set_value(fan_hd, st->setpoint);
if (rc) {
printk(KERN_WARNING "windfarm: HD fan error %d\n",
rc);
wf_smu_failure_state |= FAILURE_FAN;
}
}
}
static void wf_smu_create_slots_fans(void)
{
struct wf_pid_param param = {
.interval = 1,
.history_len = 8,
.gd = 0x00000000,
.gp = 0x00000000,
.gr = 0x00020000,
.itarget = 0x00000000
};
/* Alloc & initialize state */
wf_smu_slots_fans = kmalloc(sizeof(struct wf_smu_slots_fans_state),
GFP_KERNEL);
if (wf_smu_slots_fans == NULL) {
printk(KERN_WARNING "windfarm: Memory allocation error"
" max fan speed\n");
goto fail;
}
wf_smu_slots_fans->ticks = 1;
/* Fill PID params */
param.additive = (fan_slots->type == WF_CONTROL_RPM_FAN);
param.min = fan_slots->ops->get_min(fan_slots);
param.max = fan_slots->ops->get_max(fan_slots);
wf_pid_init(&wf_smu_slots_fans->pid, ¶m);
DBG("wf: Slots Fan control initialized.\n");
DBG(" itarged=%d.%03d, min=%d RPM, max=%d RPM\n",
FIX32TOPRINT(param.itarget), param.min, param.max);
return;
fail:
if (fan_slots)
wf_control_set_max(fan_slots);
}
static void wf_smu_slots_fans_tick(struct wf_smu_slots_fans_state *st)
{
s32 new_setpoint, power;
int rc;
if (--st->ticks != 0) {
if (wf_smu_readjust)
goto readjust;
return;
}
st->ticks = st->pid.param.interval;
rc = sensor_slots_power->ops->get_value(sensor_slots_power, &power);
if (rc) {
printk(KERN_WARNING "windfarm: Slots power sensor error %d\n",
rc);
wf_smu_failure_state |= FAILURE_SENSOR;
return;
}
DBG("wf_smu: Slots Fans tick ! Slots power: %d.%03d\n",
FIX32TOPRINT(power));
#if 0 /* Check what makes a good overtemp condition */
if (power > (st->pid.param.itarget + 0x50000))
wf_smu_failure_state |= FAILURE_OVERTEMP;
#endif
new_setpoint = wf_pid_run(&st->pid, power);
DBG("wf_smu: new_setpoint: %d\n", (int)new_setpoint);
if (st->setpoint == new_setpoint)
return;
st->setpoint = new_setpoint;
readjust:
if (fan_slots && wf_smu_failure_state == 0) {
rc = fan_slots->ops->set_value(fan_slots, st->setpoint);
if (rc) {
printk(KERN_WARNING "windfarm: Slots fan error %d\n",
rc);
wf_smu_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);
}