static ssize_t
nouveau_hwmon_show_temp(struct device *d, struct device_attribute *a, char *buf)
{
struct drm_device *dev = dev_get_drvdata(d);
struct nouveau_drm *drm = nouveau_drm(dev);
struct nvkm_therm *therm = nvxx_therm(&drm->device);
int temp = nvkm_therm_temp_get(therm);
if (temp < 0)
return temp;
return snprintf(buf, PAGE_SIZE, "%d\n", temp * 1000);
}
int
nouveau_hwmon_init(struct drm_device *dev)
{
#if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
struct nouveau_drm *drm = nouveau_drm(dev);
struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device);
struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
struct nvkm_volt *volt = nvxx_volt(&drm->client.device);
const struct attribute_group *special_groups[N_ATTR_GROUPS];
struct nouveau_hwmon *hwmon;
struct device *hwmon_dev;
int ret = 0;
int i = 0;
if (!iccsense && !therm && !volt) {
NV_DEBUG(drm, "Skipping hwmon registration\n");
return 0;
}
hwmon = drm->hwmon = kzalloc(sizeof(*hwmon), GFP_KERNEL);
if (!hwmon)
return -ENOMEM;
hwmon->dev = dev;
if (therm && therm->attr_get && therm->attr_set) {
if (nvkm_therm_temp_get(therm) >= 0)
special_groups[i++] = &temp1_auto_point_sensor_group;
if (therm->fan_get && therm->fan_get(therm) >= 0)
special_groups[i++] = &pwm_fan_sensor_group;
}
special_groups[i] = 0;
hwmon_dev = hwmon_device_register_with_info(dev->dev, "nouveau", dev,
&nouveau_chip_info,
special_groups);
if (IS_ERR(hwmon_dev)) {
ret = PTR_ERR(hwmon_dev);
NV_ERROR(drm, "Unable to register hwmon device: %d\n", ret);
return ret;
}
hwmon->hwmon = hwmon_dev;
return 0;
#else
return 0;
#endif
}
static int
nouveau_temp_read(struct device *dev, u32 attr, int channel, long *val)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
struct nouveau_drm *drm = nouveau_drm(drm_dev);
struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
int ret;
if (!therm || !therm->attr_get)
return -EOPNOTSUPP;
switch (attr) {
case hwmon_temp_input:
ret = nvkm_therm_temp_get(therm);
*val = ret < 0 ? ret : (ret * 1000);
break;
case hwmon_temp_max:
*val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK)
* 1000;
break;
case hwmon_temp_max_hyst:
*val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST)
* 1000;
break;
case hwmon_temp_crit:
*val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL)
* 1000;
break;
case hwmon_temp_crit_hyst:
*val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST)
* 1000;
break;
case hwmon_temp_emergency:
*val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN)
* 1000;
break;
case hwmon_temp_emergency_hyst:
*val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST)
* 1000;
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static umode_t
nouveau_temp_is_visible(const void *data, u32 attr, int channel)
{
struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
if (!therm || !therm->attr_get || nvkm_therm_temp_get(therm) < 0)
return 0;
switch (attr) {
case hwmon_temp_input:
return 0444;
case hwmon_temp_max:
case hwmon_temp_max_hyst:
case hwmon_temp_crit:
case hwmon_temp_crit_hyst:
case hwmon_temp_emergency:
case hwmon_temp_emergency_hyst:
return 0644;
default:
return 0;
}
}
int
nouveau_hwmon_init(struct drm_device *dev)
{
#if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
struct nouveau_drm *drm = nouveau_drm(dev);
struct nvkm_therm *therm = nvxx_therm(&drm->device);
struct nvkm_volt *volt = nvxx_volt(&drm->device);
struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->device);
struct nouveau_hwmon *hwmon;
struct device *hwmon_dev;
int ret = 0;
hwmon = drm->hwmon = kzalloc(sizeof(*hwmon), GFP_KERNEL);
if (!hwmon)
return -ENOMEM;
hwmon->dev = dev;
hwmon_dev = hwmon_device_register(dev->dev);
if (IS_ERR(hwmon_dev)) {
ret = PTR_ERR(hwmon_dev);
NV_ERROR(drm, "Unable to register hwmon device: %d\n", ret);
return ret;
}
dev_set_drvdata(hwmon_dev, dev);
/* set the default attributes */
ret = sysfs_create_group(&hwmon_dev->kobj, &hwmon_default_attrgroup);
if (ret)
goto error;
if (therm && therm->attr_get && therm->attr_set) {
/* if the card has a working thermal sensor */
if (nvkm_therm_temp_get(therm) >= 0) {
ret = sysfs_create_group(&hwmon_dev->kobj, &hwmon_temp_attrgroup);
if (ret)
goto error;
}
/* if the card has a pwm fan */
/*XXX: incorrect, need better detection for this, some boards have
* the gpio entries for pwm fan control even when there's no
* actual fan connected to it... therm table? */
if (therm->fan_get && therm->fan_get(therm) >= 0) {
ret = sysfs_create_group(&hwmon_dev->kobj,
&hwmon_pwm_fan_attrgroup);
if (ret)
goto error;
}
}
/* if the card can read the fan rpm */
if (therm && nvkm_therm_fan_sense(therm) >= 0) {
ret = sysfs_create_group(&hwmon_dev->kobj,
&hwmon_fan_rpm_attrgroup);
if (ret)
goto error;
}
if (volt && nvkm_volt_get(volt) >= 0) {
ret = sysfs_create_group(&hwmon_dev->kobj,
&hwmon_in0_attrgroup);
if (ret)
goto error;
}
if (iccsense && iccsense->data_valid && !list_empty(&iccsense->rails)) {
ret = sysfs_create_group(&hwmon_dev->kobj,
&hwmon_power_attrgroup);
if (ret)
goto error;
}
hwmon->hwmon = hwmon_dev;
return 0;
error:
NV_ERROR(drm, "Unable to create some hwmon sysfs files: %d\n", ret);
hwmon_device_unregister(hwmon_dev);
hwmon->hwmon = NULL;
return ret;
#else
return 0;
#endif
}