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845 lines
20 KiB
845 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Windfarm PowerMac thermal control. |
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* Control loops for PowerMac7,2 and 7,3 |
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* |
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* Copyright (C) 2012 Benjamin Herrenschmidt, IBM Corp. |
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*/ |
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#include <linux/types.h> |
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#include <linux/errno.h> |
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#include <linux/kernel.h> |
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#include <linux/device.h> |
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#include <linux/platform_device.h> |
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#include <linux/reboot.h> |
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#include <asm/prom.h> |
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#include <asm/smu.h> |
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#include "windfarm.h" |
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#include "windfarm_pid.h" |
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#include "windfarm_mpu.h" |
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#define VERSION "1.0" |
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#undef DEBUG |
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#undef LOTSA_DEBUG |
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#ifdef DEBUG |
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#define DBG(args...) printk(args) |
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#else |
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#define DBG(args...) do { } while(0) |
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#endif |
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|
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#ifdef LOTSA_DEBUG |
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#define DBG_LOTS(args...) printk(args) |
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#else |
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#define DBG_LOTS(args...) do { } while(0) |
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#endif |
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|
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/* define this to force CPU overtemp to 60 degree, useful for testing |
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* the overtemp code |
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*/ |
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#undef HACKED_OVERTEMP |
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/* We currently only handle 2 chips */ |
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#define NR_CHIPS 2 |
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#define NR_CPU_FANS 3 * NR_CHIPS |
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/* Controls and sensors */ |
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static struct wf_sensor *sens_cpu_temp[NR_CHIPS]; |
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static struct wf_sensor *sens_cpu_volts[NR_CHIPS]; |
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static struct wf_sensor *sens_cpu_amps[NR_CHIPS]; |
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static struct wf_sensor *backside_temp; |
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static struct wf_sensor *drives_temp; |
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static struct wf_control *cpu_front_fans[NR_CHIPS]; |
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static struct wf_control *cpu_rear_fans[NR_CHIPS]; |
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static struct wf_control *cpu_pumps[NR_CHIPS]; |
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static struct wf_control *backside_fan; |
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static struct wf_control *drives_fan; |
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static struct wf_control *slots_fan; |
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static struct wf_control *cpufreq_clamp; |
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|
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/* We keep a temperature history for average calculation of 180s */ |
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#define CPU_TEMP_HIST_SIZE 180 |
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/* Fixed speed for slot fan */ |
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#define SLOTS_FAN_DEFAULT_PWM 40 |
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|
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/* Scale value for CPU intake fans */ |
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#define CPU_INTAKE_SCALE 0x0000f852 |
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/* PID loop state */ |
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static const struct mpu_data *cpu_mpu_data[NR_CHIPS]; |
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static struct wf_cpu_pid_state cpu_pid[NR_CHIPS]; |
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static bool cpu_pid_combined; |
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static u32 cpu_thist[CPU_TEMP_HIST_SIZE]; |
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static int cpu_thist_pt; |
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static s64 cpu_thist_total; |
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static s32 cpu_all_tmax = 100 << 16; |
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static struct wf_pid_state backside_pid; |
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static int backside_tick; |
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static struct wf_pid_state drives_pid; |
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static int drives_tick; |
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static int nr_chips; |
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static bool have_all_controls; |
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static bool have_all_sensors; |
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static bool started; |
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static int failure_state; |
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#define FAILURE_SENSOR 1 |
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#define FAILURE_FAN 2 |
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#define FAILURE_PERM 4 |
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#define FAILURE_LOW_OVERTEMP 8 |
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#define FAILURE_HIGH_OVERTEMP 16 |
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/* Overtemp values */ |
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#define LOW_OVER_AVERAGE 0 |
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#define LOW_OVER_IMMEDIATE (10 << 16) |
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#define LOW_OVER_CLEAR ((-10) << 16) |
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#define HIGH_OVER_IMMEDIATE (14 << 16) |
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#define HIGH_OVER_AVERAGE (10 << 16) |
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#define HIGH_OVER_IMMEDIATE (14 << 16) |
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static void cpu_max_all_fans(void) |
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{ |
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int i; |
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/* We max all CPU fans in case of a sensor error. We also do the |
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* cpufreq clamping now, even if it's supposedly done later by the |
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* generic code anyway, we do it earlier here to react faster |
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*/ |
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if (cpufreq_clamp) |
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wf_control_set_max(cpufreq_clamp); |
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for (i = 0; i < nr_chips; i++) { |
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if (cpu_front_fans[i]) |
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wf_control_set_max(cpu_front_fans[i]); |
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if (cpu_rear_fans[i]) |
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wf_control_set_max(cpu_rear_fans[i]); |
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if (cpu_pumps[i]) |
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wf_control_set_max(cpu_pumps[i]); |
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} |
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} |
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static int cpu_check_overtemp(s32 temp) |
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{ |
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int new_state = 0; |
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s32 t_avg, t_old; |
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static bool first = true; |
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|
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/* First check for immediate overtemps */ |
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if (temp >= (cpu_all_tmax + LOW_OVER_IMMEDIATE)) { |
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new_state |= FAILURE_LOW_OVERTEMP; |
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if ((failure_state & FAILURE_LOW_OVERTEMP) == 0) |
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printk(KERN_ERR "windfarm: Overtemp due to immediate CPU" |
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" temperature !\n"); |
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} |
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if (temp >= (cpu_all_tmax + HIGH_OVER_IMMEDIATE)) { |
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new_state |= FAILURE_HIGH_OVERTEMP; |
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if ((failure_state & FAILURE_HIGH_OVERTEMP) == 0) |
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printk(KERN_ERR "windfarm: Critical overtemp due to" |
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" immediate CPU temperature !\n"); |
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} |
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/* |
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* The first time around, initialize the array with the first |
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* temperature reading |
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*/ |
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if (first) { |
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int i; |
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cpu_thist_total = 0; |
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for (i = 0; i < CPU_TEMP_HIST_SIZE; i++) { |
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cpu_thist[i] = temp; |
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cpu_thist_total += temp; |
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} |
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first = false; |
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} |
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/* |
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* We calculate a history of max temperatures and use that for the |
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* overtemp management |
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*/ |
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t_old = cpu_thist[cpu_thist_pt]; |
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cpu_thist[cpu_thist_pt] = temp; |
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cpu_thist_pt = (cpu_thist_pt + 1) % CPU_TEMP_HIST_SIZE; |
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cpu_thist_total -= t_old; |
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cpu_thist_total += temp; |
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t_avg = cpu_thist_total / CPU_TEMP_HIST_SIZE; |
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DBG_LOTS(" t_avg = %d.%03d (out: %d.%03d, in: %d.%03d)\n", |
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FIX32TOPRINT(t_avg), FIX32TOPRINT(t_old), FIX32TOPRINT(temp)); |
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/* Now check for average overtemps */ |
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if (t_avg >= (cpu_all_tmax + LOW_OVER_AVERAGE)) { |
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new_state |= FAILURE_LOW_OVERTEMP; |
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if ((failure_state & FAILURE_LOW_OVERTEMP) == 0) |
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printk(KERN_ERR "windfarm: Overtemp due to average CPU" |
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" temperature !\n"); |
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} |
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if (t_avg >= (cpu_all_tmax + HIGH_OVER_AVERAGE)) { |
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new_state |= FAILURE_HIGH_OVERTEMP; |
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if ((failure_state & FAILURE_HIGH_OVERTEMP) == 0) |
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printk(KERN_ERR "windfarm: Critical overtemp due to" |
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" average CPU temperature !\n"); |
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} |
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/* Now handle overtemp conditions. We don't currently use the windfarm |
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* overtemp handling core as it's not fully suited to the needs of those |
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* new machine. This will be fixed later. |
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*/ |
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if (new_state) { |
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/* High overtemp -> immediate shutdown */ |
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if (new_state & FAILURE_HIGH_OVERTEMP) |
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machine_power_off(); |
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if ((failure_state & new_state) != new_state) |
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cpu_max_all_fans(); |
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failure_state |= new_state; |
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} else if ((failure_state & FAILURE_LOW_OVERTEMP) && |
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(temp < (cpu_all_tmax + LOW_OVER_CLEAR))) { |
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printk(KERN_ERR "windfarm: Overtemp condition cleared !\n"); |
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failure_state &= ~FAILURE_LOW_OVERTEMP; |
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} |
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return failure_state & (FAILURE_LOW_OVERTEMP | FAILURE_HIGH_OVERTEMP); |
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} |
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static int read_one_cpu_vals(int cpu, s32 *temp, s32 *power) |
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{ |
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s32 dtemp, volts, amps; |
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int rc; |
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/* Get diode temperature */ |
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rc = wf_sensor_get(sens_cpu_temp[cpu], &dtemp); |
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if (rc) { |
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DBG(" CPU%d: temp reading error !\n", cpu); |
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return -EIO; |
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} |
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DBG_LOTS(" CPU%d: temp = %d.%03d\n", cpu, FIX32TOPRINT((dtemp))); |
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*temp = dtemp; |
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/* Get voltage */ |
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rc = wf_sensor_get(sens_cpu_volts[cpu], &volts); |
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if (rc) { |
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DBG(" CPU%d, volts reading error !\n", cpu); |
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return -EIO; |
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} |
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DBG_LOTS(" CPU%d: volts = %d.%03d\n", cpu, FIX32TOPRINT((volts))); |
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/* Get current */ |
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rc = wf_sensor_get(sens_cpu_amps[cpu], &s); |
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if (rc) { |
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DBG(" CPU%d, current reading error !\n", cpu); |
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return -EIO; |
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} |
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DBG_LOTS(" CPU%d: amps = %d.%03d\n", cpu, FIX32TOPRINT((amps))); |
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/* Calculate power */ |
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/* Scale voltage and current raw sensor values according to fixed scales |
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* obtained in Darwin and calculate power from I and V |
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*/ |
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*power = (((u64)volts) * ((u64)amps)) >> 16; |
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DBG_LOTS(" CPU%d: power = %d.%03d\n", cpu, FIX32TOPRINT((*power))); |
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return 0; |
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} |
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static void cpu_fans_tick_split(void) |
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{ |
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int err, cpu; |
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s32 intake, temp, power, t_max = 0; |
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DBG_LOTS("* cpu fans_tick_split()\n"); |
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for (cpu = 0; cpu < nr_chips; ++cpu) { |
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struct wf_cpu_pid_state *sp = &cpu_pid[cpu]; |
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/* Read current speed */ |
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wf_control_get(cpu_rear_fans[cpu], &sp->target); |
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DBG_LOTS(" CPU%d: cur_target = %d RPM\n", cpu, sp->target); |
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err = read_one_cpu_vals(cpu, &temp, &power); |
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if (err) { |
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failure_state |= FAILURE_SENSOR; |
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cpu_max_all_fans(); |
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return; |
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} |
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/* Keep track of highest temp */ |
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t_max = max(t_max, temp); |
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/* Handle possible overtemps */ |
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if (cpu_check_overtemp(t_max)) |
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return; |
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/* Run PID */ |
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wf_cpu_pid_run(sp, power, temp); |
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DBG_LOTS(" CPU%d: target = %d RPM\n", cpu, sp->target); |
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/* Apply result directly to exhaust fan */ |
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err = wf_control_set(cpu_rear_fans[cpu], sp->target); |
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if (err) { |
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pr_warn("wf_pm72: Fan %s reports error %d\n", |
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cpu_rear_fans[cpu]->name, err); |
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failure_state |= FAILURE_FAN; |
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break; |
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} |
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/* Scale result for intake fan */ |
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intake = (sp->target * CPU_INTAKE_SCALE) >> 16; |
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DBG_LOTS(" CPU%d: intake = %d RPM\n", cpu, intake); |
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err = wf_control_set(cpu_front_fans[cpu], intake); |
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if (err) { |
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pr_warn("wf_pm72: Fan %s reports error %d\n", |
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cpu_front_fans[cpu]->name, err); |
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failure_state |= FAILURE_FAN; |
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break; |
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} |
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} |
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} |
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static void cpu_fans_tick_combined(void) |
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{ |
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s32 temp0, power0, temp1, power1, t_max = 0; |
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s32 temp, power, intake, pump; |
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struct wf_control *pump0, *pump1; |
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struct wf_cpu_pid_state *sp = &cpu_pid[0]; |
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int err, cpu; |
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DBG_LOTS("* cpu fans_tick_combined()\n"); |
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/* Read current speed from cpu 0 */ |
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wf_control_get(cpu_rear_fans[0], &sp->target); |
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DBG_LOTS(" CPUs: cur_target = %d RPM\n", sp->target); |
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/* Read values for both CPUs */ |
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err = read_one_cpu_vals(0, &temp0, &power0); |
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if (err) { |
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failure_state |= FAILURE_SENSOR; |
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cpu_max_all_fans(); |
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return; |
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} |
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err = read_one_cpu_vals(1, &temp1, &power1); |
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if (err) { |
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failure_state |= FAILURE_SENSOR; |
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cpu_max_all_fans(); |
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return; |
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} |
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/* Keep track of highest temp */ |
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t_max = max(t_max, max(temp0, temp1)); |
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|
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/* Handle possible overtemps */ |
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if (cpu_check_overtemp(t_max)) |
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return; |
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/* Use the max temp & power of both */ |
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temp = max(temp0, temp1); |
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power = max(power0, power1); |
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/* Run PID */ |
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wf_cpu_pid_run(sp, power, temp); |
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/* Scale result for intake fan */ |
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intake = (sp->target * CPU_INTAKE_SCALE) >> 16; |
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/* Same deal with pump speed */ |
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pump0 = cpu_pumps[0]; |
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pump1 = cpu_pumps[1]; |
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if (!pump0) { |
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pump0 = pump1; |
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pump1 = NULL; |
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} |
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pump = (sp->target * wf_control_get_max(pump0)) / |
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cpu_mpu_data[0]->rmaxn_exhaust_fan; |
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DBG_LOTS(" CPUs: target = %d RPM\n", sp->target); |
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DBG_LOTS(" CPUs: intake = %d RPM\n", intake); |
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DBG_LOTS(" CPUs: pump = %d RPM\n", pump); |
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for (cpu = 0; cpu < nr_chips; cpu++) { |
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err = wf_control_set(cpu_rear_fans[cpu], sp->target); |
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if (err) { |
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pr_warn("wf_pm72: Fan %s reports error %d\n", |
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cpu_rear_fans[cpu]->name, err); |
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failure_state |= FAILURE_FAN; |
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} |
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err = wf_control_set(cpu_front_fans[cpu], intake); |
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if (err) { |
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pr_warn("wf_pm72: Fan %s reports error %d\n", |
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cpu_front_fans[cpu]->name, err); |
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failure_state |= FAILURE_FAN; |
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} |
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err = 0; |
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if (cpu_pumps[cpu]) |
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err = wf_control_set(cpu_pumps[cpu], pump); |
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if (err) { |
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pr_warn("wf_pm72: Pump %s reports error %d\n", |
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cpu_pumps[cpu]->name, err); |
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failure_state |= FAILURE_FAN; |
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} |
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} |
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} |
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/* Implementation... */ |
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static int cpu_setup_pid(int cpu) |
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{ |
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struct wf_cpu_pid_param pid; |
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const struct mpu_data *mpu = cpu_mpu_data[cpu]; |
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s32 tmax, ttarget, ptarget; |
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int fmin, fmax, hsize; |
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/* Get PID params from the appropriate MPU EEPROM */ |
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tmax = mpu->tmax << 16; |
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ttarget = mpu->ttarget << 16; |
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ptarget = ((s32)(mpu->pmaxh - mpu->padjmax)) << 16; |
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DBG("wf_72: CPU%d ttarget = %d.%03d, tmax = %d.%03d\n", |
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cpu, FIX32TOPRINT(ttarget), FIX32TOPRINT(tmax)); |
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/* We keep a global tmax for overtemp calculations */ |
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if (tmax < cpu_all_tmax) |
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cpu_all_tmax = tmax; |
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/* Set PID min/max by using the rear fan min/max */ |
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fmin = wf_control_get_min(cpu_rear_fans[cpu]); |
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fmax = wf_control_get_max(cpu_rear_fans[cpu]); |
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DBG("wf_72: CPU%d max RPM range = [%d..%d]\n", cpu, fmin, fmax); |
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/* History size */ |
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hsize = min_t(int, mpu->tguardband, WF_PID_MAX_HISTORY); |
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DBG("wf_72: CPU%d history size = %d\n", cpu, hsize); |
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/* Initialize PID loop */ |
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pid.interval = 1; /* seconds */ |
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pid.history_len = hsize; |
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pid.gd = mpu->pid_gd; |
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pid.gp = mpu->pid_gp; |
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pid.gr = mpu->pid_gr; |
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pid.tmax = tmax; |
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pid.ttarget = ttarget; |
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pid.pmaxadj = ptarget; |
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pid.min = fmin; |
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pid.max = fmax; |
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wf_cpu_pid_init(&cpu_pid[cpu], &pid); |
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cpu_pid[cpu].target = 1000; |
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return 0; |
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} |
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|
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/* Backside/U3 fan */ |
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static struct wf_pid_param backside_u3_param = { |
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.interval = 5, |
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.history_len = 2, |
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.gd = 40 << 20, |
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.gp = 5 << 20, |
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.gr = 0, |
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.itarget = 65 << 16, |
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.additive = 1, |
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.min = 20, |
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.max = 100, |
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}; |
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static struct wf_pid_param backside_u3h_param = { |
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.interval = 5, |
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.history_len = 2, |
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.gd = 20 << 20, |
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.gp = 5 << 20, |
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.gr = 0, |
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.itarget = 75 << 16, |
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.additive = 1, |
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.min = 20, |
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.max = 100, |
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}; |
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|
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static void backside_fan_tick(void) |
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{ |
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s32 temp; |
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int speed; |
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int err; |
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|
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if (!backside_fan || !backside_temp || !backside_tick) |
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return; |
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if (--backside_tick > 0) |
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return; |
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backside_tick = backside_pid.param.interval; |
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|
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DBG_LOTS("* backside fans tick\n"); |
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|
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/* Update fan speed from actual fans */ |
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err = wf_control_get(backside_fan, &speed); |
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if (!err) |
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backside_pid.target = speed; |
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|
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err = wf_sensor_get(backside_temp, &temp); |
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if (err) { |
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printk(KERN_WARNING "windfarm: U4 temp sensor error %d\n", |
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err); |
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failure_state |= FAILURE_SENSOR; |
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wf_control_set_max(backside_fan); |
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return; |
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} |
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speed = wf_pid_run(&backside_pid, temp); |
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|
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DBG_LOTS("backside PID temp=%d.%.3d speed=%d\n", |
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FIX32TOPRINT(temp), speed); |
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|
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err = wf_control_set(backside_fan, speed); |
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if (err) { |
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printk(KERN_WARNING "windfarm: backside fan error %d\n", err); |
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failure_state |= FAILURE_FAN; |
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} |
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} |
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|
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static void backside_setup_pid(void) |
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{ |
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/* first time initialize things */ |
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s32 fmin = wf_control_get_min(backside_fan); |
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s32 fmax = wf_control_get_max(backside_fan); |
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struct wf_pid_param param; |
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struct device_node *u3; |
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int u3h = 1; /* conservative by default */ |
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|
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u3 = of_find_node_by_path("/u3@0,f8000000"); |
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if (u3 != NULL) { |
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const u32 *vers = of_get_property(u3, "device-rev", NULL); |
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if (vers) |
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if (((*vers) & 0x3f) < 0x34) |
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u3h = 0; |
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of_node_put(u3); |
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} |
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|
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param = u3h ? backside_u3h_param : backside_u3_param; |
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|
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param.min = max(param.min, fmin); |
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param.max = min(param.max, fmax); |
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wf_pid_init(&backside_pid, ¶m); |
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backside_tick = 1; |
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|
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pr_info("wf_pm72: Backside control loop started.\n"); |
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} |
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|
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/* Drive bay fan */ |
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static const struct wf_pid_param drives_param = { |
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.interval = 5, |
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.history_len = 2, |
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.gd = 30 << 20, |
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.gp = 5 << 20, |
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.gr = 0, |
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.itarget = 40 << 16, |
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.additive = 1, |
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.min = 300, |
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.max = 4000, |
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}; |
|
|
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static void drives_fan_tick(void) |
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{ |
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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_warn("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 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"); |
|
} |
|
|
|
static void set_fail_state(void) |
|
{ |
|
cpu_max_all_fans(); |
|
|
|
if (backside_fan) |
|
wf_control_set_max(backside_fan); |
|
if (slots_fan) |
|
wf_control_set_max(slots_fan); |
|
if (drives_fan) |
|
wf_control_set_max(drives_fan); |
|
} |
|
|
|
static void pm72_tick(void) |
|
{ |
|
int i, last_failure; |
|
|
|
if (!started) { |
|
started = true; |
|
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 pm72_new_control(struct wf_control *ct) |
|
{ |
|
bool all_controls; |
|
bool had_pump = cpu_pumps[0] || cpu_pumps[1]; |
|
|
|
if (!strcmp(ct->name, "cpu-front-fan-0")) |
|
cpu_front_fans[0] = ct; |
|
else if (!strcmp(ct->name, "cpu-front-fan-1")) |
|
cpu_front_fans[1] = ct; |
|
else if (!strcmp(ct->name, "cpu-rear-fan-0")) |
|
cpu_rear_fans[0] = ct; |
|
else if (!strcmp(ct->name, "cpu-rear-fan-1")) |
|
cpu_rear_fans[1] = ct; |
|
else if (!strcmp(ct->name, "cpu-pump-0")) |
|
cpu_pumps[0] = ct; |
|
else if (!strcmp(ct->name, "cpu-pump-1")) |
|
cpu_pumps[1] = ct; |
|
else if (!strcmp(ct->name, "backside-fan")) |
|
backside_fan = ct; |
|
else if (!strcmp(ct->name, "slots-fan")) |
|
slots_fan = ct; |
|
else if (!strcmp(ct->name, "drive-bay-fan")) |
|
drives_fan = ct; |
|
else if (!strcmp(ct->name, "cpufreq-clamp")) |
|
cpufreq_clamp = ct; |
|
|
|
all_controls = |
|
cpu_front_fans[0] && |
|
cpu_rear_fans[0] && |
|
backside_fan && |
|
slots_fan && |
|
drives_fan; |
|
if (nr_chips > 1) |
|
all_controls &= |
|
cpu_front_fans[1] && |
|
cpu_rear_fans[1]; |
|
have_all_controls = all_controls; |
|
|
|
if ((cpu_pumps[0] || cpu_pumps[1]) && !had_pump) { |
|
pr_info("wf_pm72: Liquid cooling pump(s) detected," |
|
" using new algorithm !\n"); |
|
cpu_pid_combined = true; |
|
} |
|
} |
|
|
|
|
|
static void pm72_new_sensor(struct wf_sensor *sr) |
|
{ |
|
bool all_sensors; |
|
|
|
if (!strcmp(sr->name, "cpu-diode-temp-0")) |
|
sens_cpu_temp[0] = sr; |
|
else if (!strcmp(sr->name, "cpu-diode-temp-1")) |
|
sens_cpu_temp[1] = sr; |
|
else if (!strcmp(sr->name, "cpu-voltage-0")) |
|
sens_cpu_volts[0] = sr; |
|
else if (!strcmp(sr->name, "cpu-voltage-1")) |
|
sens_cpu_volts[1] = sr; |
|
else if (!strcmp(sr->name, "cpu-current-0")) |
|
sens_cpu_amps[0] = sr; |
|
else if (!strcmp(sr->name, "cpu-current-1")) |
|
sens_cpu_amps[1] = sr; |
|
else if (!strcmp(sr->name, "backside-temp")) |
|
backside_temp = sr; |
|
else if (!strcmp(sr->name, "hd-temp")) |
|
drives_temp = sr; |
|
|
|
all_sensors = |
|
sens_cpu_temp[0] && |
|
sens_cpu_volts[0] && |
|
sens_cpu_amps[0] && |
|
backside_temp && |
|
drives_temp; |
|
if (nr_chips > 1) |
|
all_sensors &= |
|
sens_cpu_temp[1] && |
|
sens_cpu_volts[1] && |
|
sens_cpu_amps[1]; |
|
|
|
have_all_sensors = all_sensors; |
|
} |
|
|
|
static int pm72_wf_notify(struct notifier_block *self, |
|
unsigned long event, void *data) |
|
{ |
|
switch (event) { |
|
case WF_EVENT_NEW_SENSOR: |
|
pm72_new_sensor(data); |
|
break; |
|
case WF_EVENT_NEW_CONTROL: |
|
pm72_new_control(data); |
|
break; |
|
case WF_EVENT_TICK: |
|
if (have_all_controls && have_all_sensors) |
|
pm72_tick(); |
|
} |
|
return 0; |
|
} |
|
|
|
static struct notifier_block pm72_events = { |
|
.notifier_call = pm72_wf_notify, |
|
}; |
|
|
|
static int wf_pm72_probe(struct platform_device *dev) |
|
{ |
|
wf_register_client(&pm72_events); |
|
return 0; |
|
} |
|
|
|
static int wf_pm72_remove(struct platform_device *dev) |
|
{ |
|
wf_unregister_client(&pm72_events); |
|
|
|
/* should release all sensors and controls */ |
|
return 0; |
|
} |
|
|
|
static struct platform_driver wf_pm72_driver = { |
|
.probe = wf_pm72_probe, |
|
.remove = wf_pm72_remove, |
|
.driver = { |
|
.name = "windfarm", |
|
}, |
|
}; |
|
|
|
static int __init wf_pm72_init(void) |
|
{ |
|
struct device_node *cpu; |
|
int i; |
|
|
|
if (!of_machine_is_compatible("PowerMac7,2") && |
|
!of_machine_is_compatible("PowerMac7,3")) |
|
return -ENODEV; |
|
|
|
/* Count the number of CPU cores */ |
|
nr_chips = 0; |
|
for_each_node_by_type(cpu, "cpu") |
|
++nr_chips; |
|
if (nr_chips > NR_CHIPS) |
|
nr_chips = NR_CHIPS; |
|
|
|
pr_info("windfarm: Initializing for desktop G5 with %d chips\n", |
|
nr_chips); |
|
|
|
/* Get MPU data for each CPU */ |
|
for (i = 0; i < nr_chips; i++) { |
|
cpu_mpu_data[i] = wf_get_mpu(i); |
|
if (!cpu_mpu_data[i]) { |
|
pr_err("wf_pm72: Failed to find MPU data for CPU %d\n", i); |
|
return -ENXIO; |
|
} |
|
} |
|
|
|
#ifdef MODULE |
|
request_module("windfarm_fcu_controls"); |
|
request_module("windfarm_lm75_sensor"); |
|
request_module("windfarm_ad7417_sensor"); |
|
request_module("windfarm_max6690_sensor"); |
|
request_module("windfarm_cpufreq_clamp"); |
|
#endif /* MODULE */ |
|
|
|
platform_driver_register(&wf_pm72_driver); |
|
return 0; |
|
} |
|
|
|
static void __exit wf_pm72_exit(void) |
|
{ |
|
platform_driver_unregister(&wf_pm72_driver); |
|
} |
|
|
|
module_init(wf_pm72_init); |
|
module_exit(wf_pm72_exit); |
|
|
|
MODULE_AUTHOR("Benjamin Herrenschmidt <[email protected]>"); |
|
MODULE_DESCRIPTION("Thermal control for AGP PowerMac G5s"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_ALIAS("platform:windfarm");
|
|
|