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path: root/drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c253
1 files changed, 253 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c
new file mode 100644
index 000000000..ddb2b2c60
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright 2012 The Nouveau community
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Martin Peres
+ */
+#include "priv.h"
+
+static void
+nvkm_therm_temp_set_defaults(struct nvkm_therm *therm)
+{
+ therm->bios_sensor.offset_constant = 0;
+
+ therm->bios_sensor.thrs_fan_boost.temp = 90;
+ therm->bios_sensor.thrs_fan_boost.hysteresis = 3;
+
+ therm->bios_sensor.thrs_down_clock.temp = 95;
+ therm->bios_sensor.thrs_down_clock.hysteresis = 3;
+
+ therm->bios_sensor.thrs_critical.temp = 105;
+ therm->bios_sensor.thrs_critical.hysteresis = 5;
+
+ therm->bios_sensor.thrs_shutdown.temp = 135;
+ therm->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */
+}
+
+static void
+nvkm_therm_temp_safety_checks(struct nvkm_therm *therm)
+{
+ struct nvbios_therm_sensor *s = &therm->bios_sensor;
+
+ /* enforce a minimum hysteresis on thresholds */
+ s->thrs_fan_boost.hysteresis = max_t(u8, s->thrs_fan_boost.hysteresis, 2);
+ s->thrs_down_clock.hysteresis = max_t(u8, s->thrs_down_clock.hysteresis, 2);
+ s->thrs_critical.hysteresis = max_t(u8, s->thrs_critical.hysteresis, 2);
+ s->thrs_shutdown.hysteresis = max_t(u8, s->thrs_shutdown.hysteresis, 2);
+}
+
+/* must be called with alarm_program_lock taken ! */
+void
+nvkm_therm_sensor_set_threshold_state(struct nvkm_therm *therm,
+ enum nvkm_therm_thrs thrs,
+ enum nvkm_therm_thrs_state st)
+{
+ therm->sensor.alarm_state[thrs] = st;
+}
+
+/* must be called with alarm_program_lock taken ! */
+enum nvkm_therm_thrs_state
+nvkm_therm_sensor_get_threshold_state(struct nvkm_therm *therm,
+ enum nvkm_therm_thrs thrs)
+{
+ return therm->sensor.alarm_state[thrs];
+}
+
+static void
+nv_poweroff_work(struct work_struct *work)
+{
+ orderly_poweroff(true);
+ kfree(work);
+}
+
+void
+nvkm_therm_sensor_event(struct nvkm_therm *therm, enum nvkm_therm_thrs thrs,
+ enum nvkm_therm_thrs_direction dir)
+{
+ struct nvkm_subdev *subdev = &therm->subdev;
+ bool active;
+ static const char * const thresholds[] = {
+ "fanboost", "downclock", "critical", "shutdown"
+ };
+ int temperature = therm->func->temp_get(therm);
+
+ if (thrs < 0 || thrs > 3)
+ return;
+
+ if (dir == NVKM_THERM_THRS_FALLING)
+ nvkm_info(subdev,
+ "temperature (%i C) went below the '%s' threshold\n",
+ temperature, thresholds[thrs]);
+ else
+ nvkm_info(subdev, "temperature (%i C) hit the '%s' threshold\n",
+ temperature, thresholds[thrs]);
+
+ active = (dir == NVKM_THERM_THRS_RISING);
+ switch (thrs) {
+ case NVKM_THERM_THRS_FANBOOST:
+ if (active) {
+ nvkm_therm_fan_set(therm, true, 100);
+ nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
+ }
+ break;
+ case NVKM_THERM_THRS_DOWNCLOCK:
+ if (therm->emergency.downclock)
+ therm->emergency.downclock(therm, active);
+ break;
+ case NVKM_THERM_THRS_CRITICAL:
+ if (therm->emergency.pause)
+ therm->emergency.pause(therm, active);
+ break;
+ case NVKM_THERM_THRS_SHUTDOWN:
+ if (active) {
+ struct work_struct *work;
+
+ work = kmalloc(sizeof(*work), GFP_ATOMIC);
+ if (work) {
+ INIT_WORK(work, nv_poweroff_work);
+ schedule_work(work);
+ }
+ }
+ break;
+ case NVKM_THERM_THRS_NR:
+ break;
+ }
+
+}
+
+/* must be called with alarm_program_lock taken ! */
+static void
+nvkm_therm_threshold_hyst_polling(struct nvkm_therm *therm,
+ const struct nvbios_therm_threshold *thrs,
+ enum nvkm_therm_thrs thrs_name)
+{
+ enum nvkm_therm_thrs_direction direction;
+ enum nvkm_therm_thrs_state prev_state, new_state;
+ int temp = therm->func->temp_get(therm);
+
+ prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name);
+
+ if (temp >= thrs->temp && prev_state == NVKM_THERM_THRS_LOWER) {
+ direction = NVKM_THERM_THRS_RISING;
+ new_state = NVKM_THERM_THRS_HIGHER;
+ } else if (temp <= thrs->temp - thrs->hysteresis &&
+ prev_state == NVKM_THERM_THRS_HIGHER) {
+ direction = NVKM_THERM_THRS_FALLING;
+ new_state = NVKM_THERM_THRS_LOWER;
+ } else
+ return; /* nothing to do */
+
+ nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
+ nvkm_therm_sensor_event(therm, thrs_name, direction);
+}
+
+static void
+alarm_timer_callback(struct nvkm_alarm *alarm)
+{
+ struct nvkm_therm *therm =
+ container_of(alarm, struct nvkm_therm, sensor.therm_poll_alarm);
+ struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
+ struct nvkm_timer *tmr = therm->subdev.device->timer;
+ unsigned long flags;
+
+ spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
+
+ nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_fan_boost,
+ NVKM_THERM_THRS_FANBOOST);
+
+ nvkm_therm_threshold_hyst_polling(therm,
+ &sensor->thrs_down_clock,
+ NVKM_THERM_THRS_DOWNCLOCK);
+
+ nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_critical,
+ NVKM_THERM_THRS_CRITICAL);
+
+ nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_shutdown,
+ NVKM_THERM_THRS_SHUTDOWN);
+
+ spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
+
+ /* schedule the next poll in one second */
+ if (therm->func->temp_get(therm) >= 0)
+ nvkm_timer_alarm(tmr, 1000000000ULL, alarm);
+}
+
+void
+nvkm_therm_program_alarms_polling(struct nvkm_therm *therm)
+{
+ struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
+
+ nvkm_debug(&therm->subdev,
+ "programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
+ sensor->thrs_fan_boost.temp,
+ sensor->thrs_fan_boost.hysteresis,
+ sensor->thrs_down_clock.temp,
+ sensor->thrs_down_clock.hysteresis,
+ sensor->thrs_critical.temp,
+ sensor->thrs_critical.hysteresis,
+ sensor->thrs_shutdown.temp,
+ sensor->thrs_shutdown.hysteresis);
+
+ alarm_timer_callback(&therm->sensor.therm_poll_alarm);
+}
+
+int
+nvkm_therm_sensor_init(struct nvkm_therm *therm)
+{
+ therm->func->program_alarms(therm);
+ return 0;
+}
+
+int
+nvkm_therm_sensor_fini(struct nvkm_therm *therm, bool suspend)
+{
+ struct nvkm_timer *tmr = therm->subdev.device->timer;
+ if (suspend)
+ nvkm_timer_alarm(tmr, 0, &therm->sensor.therm_poll_alarm);
+ return 0;
+}
+
+void
+nvkm_therm_sensor_preinit(struct nvkm_therm *therm)
+{
+ const char *sensor_avail = "yes";
+
+ if (therm->func->temp_get(therm) < 0)
+ sensor_avail = "no";
+
+ nvkm_debug(&therm->subdev, "internal sensor: %s\n", sensor_avail);
+}
+
+int
+nvkm_therm_sensor_ctor(struct nvkm_therm *therm)
+{
+ struct nvkm_subdev *subdev = &therm->subdev;
+ struct nvkm_bios *bios = subdev->device->bios;
+
+ nvkm_alarm_init(&therm->sensor.therm_poll_alarm, alarm_timer_callback);
+
+ nvkm_therm_temp_set_defaults(therm);
+ if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE,
+ &therm->bios_sensor))
+ nvkm_error(subdev, "nvbios_therm_sensor_parse failed\n");
+ nvkm_therm_temp_safety_checks(therm);
+
+ return 0;
+}