static void backside_setup_pid(void)
{
/* first time initialize things */
s32 fmin = wf_control_get_min(backside_fan);
s32 fmax = wf_control_get_max(backside_fan);
struct wf_pid_param param;
struct device_node *u3;
int u3h = 1; /* conservative by default */
u3 = of_find_node_by_path("/u3@0,f8000000");
if (u3 != NULL) {
const u32 *vers = of_get_property(u3, "device-rev", NULL);
if (vers)
if (((*vers) & 0x3f) < 0x34)
u3h = 0;
of_node_put(u3);
}
param = u3h ? backside_u3h_param : backside_u3_param;
param.min = max(param.min, fmin);
param.max = min(param.max, fmax);
wf_pid_init(&backside_pid, ¶m);
backside_tick = 1;
pr_info("wf_pm72: Backside control loop started.\n");
}
static void slots_setup_pid(void)
{
/* first time initialize things */
s32 fmin = wf_control_get_min(slots_fan);
s32 fmax = wf_control_get_max(slots_fan);
struct wf_pid_param param = slots_param;
param.min = max(param.min, fmin);
param.max = min(param.max, fmax);
wf_pid_init(&slots_pid, ¶m);
slots_tick = 1;
pr_info("wf_rm31: Slots control loop started.\n");
}
static void drives_setup_pid(void)
{
/* first time initialize things */
s32 fmin = wf_control_get_min(drives_fan);
s32 fmax = wf_control_get_max(drives_fan);
struct wf_pid_param param = drives_param;
param.min = max(param.min, fmin);
param.max = min(param.max, fmax);
wf_pid_init(&drives_pid, ¶m);
drives_tick = 1;
pr_info("wf_pm72: Drive bay control loop started.\n");
}
/* 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 backside_setup_pid(void)
{
/* first time initialize things */
s32 fmin = wf_control_get_min(backside_fan);
s32 fmax = wf_control_get_max(backside_fan);
struct wf_pid_param param;
param = backside_param;
param.min = max(param.min, fmin);
param.max = min(param.max, fmax);
wf_pid_init(&backside_pid, ¶m);
param = dimms_param;
wf_pid_init(&dimms_pid, ¶m);
backside_tick = 1;
pr_info("wf_rm31: Backside control loop started.\n");
}
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 = wf_control_get_min(fan_slots);
param.max = wf_control_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 = wf_sensor_get(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 = wf_control_set(fan_slots, st->setpoint);
if (rc) {
printk(KERN_WARNING "windfarm: Slots fan error %d\n",
rc);
wf_smu_failure_state |= FAILURE_FAN;
}
}
}
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 = wf_control_get_min(fan_hd);
param.max = wf_control_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 = wf_sensor_get(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 = wf_control_set(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_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 = wf_control_get_min(fan_cpu_main);
pid_param.max = wf_control_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);
}