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drm/amdgpu: Get/set dgpu power cap via hwmon API 

v2: change power unit to microWatt

Adust power limit through power1_cap
Get min/max power limit through power1_cap_min/power1_cap_max

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rex Zhu 2018-01-29 18:07:01 +08:00 committed by Alex Deucher
parent 6ab8555e04
commit 8d81bce71d
1 changed files with 75 additions and 0 deletions
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75
drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
View File

@ -1207,6 +1207,69 @@ static ssize_t amdgpu_hwmon_show_power_avg(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%u\n", uw);
}
static ssize_t amdgpu_hwmon_show_power_cap_min(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%i\n", 0);
}
static ssize_t amdgpu_hwmon_show_power_cap_max(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct amdgpu_device *adev = dev_get_drvdata(dev);
uint32_t limit = 0;
if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->get_power_limit) {
adev->powerplay.pp_funcs->get_power_limit(adev->powerplay.pp_handle, &limit, true);
return snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
} else {
return snprintf(buf, PAGE_SIZE, "\n");
}
}
static ssize_t amdgpu_hwmon_show_power_cap(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct amdgpu_device *adev = dev_get_drvdata(dev);
uint32_t limit = 0;
if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->get_power_limit) {
adev->powerplay.pp_funcs->get_power_limit(adev->powerplay.pp_handle, &limit, false);
return snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
} else {
return snprintf(buf, PAGE_SIZE, "\n");
}
}
static ssize_t amdgpu_hwmon_set_power_cap(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct amdgpu_device *adev = dev_get_drvdata(dev);
int err;
u32 value;
err = kstrtou32(buf, 10, &value);
if (err)
return err;
value = value / 1000000; /* convert to Watt */
if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->set_power_limit) {
err = adev->powerplay.pp_funcs->set_power_limit(adev->powerplay.pp_handle, value);
if (err)
return err;
} else {
return -EINVAL;
}
return count;
}
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, amdgpu_hwmon_show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, amdgpu_hwmon_show_temp_thresh, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, amdgpu_hwmon_show_temp_thresh, NULL, 1);
@ -1220,6 +1283,9 @@ static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, amdgpu_hwmon_show_vddgfx_label, NU
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, amdgpu_hwmon_show_vddnb, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, amdgpu_hwmon_show_vddnb_label, NULL, 0);
static SENSOR_DEVICE_ATTR(power1_average, S_IRUGO, amdgpu_hwmon_show_power_avg, NULL, 0);
static SENSOR_DEVICE_ATTR(power1_cap_max, S_IRUGO, amdgpu_hwmon_show_power_cap_max, NULL, 0);
static SENSOR_DEVICE_ATTR(power1_cap_min, S_IRUGO, amdgpu_hwmon_show_power_cap_min, NULL, 0);
static SENSOR_DEVICE_ATTR(power1_cap, S_IRUGO | S_IWUSR, amdgpu_hwmon_show_power_cap, amdgpu_hwmon_set_power_cap, 0);
static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
@ -1235,6 +1301,9 @@ static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_label.dev_attr.attr,
&sensor_dev_attr_power1_average.dev_attr.attr,
&sensor_dev_attr_power1_cap_max.dev_attr.attr,
&sensor_dev_attr_power1_cap_min.dev_attr.attr,
&sensor_dev_attr_power1_cap.dev_attr.attr,
NULL
};
@ -1282,6 +1351,12 @@ static umode_t hwmon_attributes_visible(struct kobject *kobj,
attr == &sensor_dev_attr_pwm1_enable.dev_attr.attr)) /* can't manage state */
effective_mode &= ~S_IWUSR;
if ((adev->flags & AMD_IS_APU) &&
(attr == &sensor_dev_attr_power1_cap_max.dev_attr.attr ||
attr == &sensor_dev_attr_power1_cap_min.dev_attr.attr||
attr == &sensor_dev_attr_power1_cap.dev_attr.attr))
return 0;
/* hide max/min values if we can't both query and manage the fan */
if ((!adev->powerplay.pp_funcs->set_fan_speed_percent &&
!adev->powerplay.pp_funcs->get_fan_speed_percent) &&