I'm not saying it's useless. But rocm-smi can already get the clocks
from sysfs (pp_dpm_sclk and pp_dpm_mclk). Are these clocks any different?
Regards,
Felix
On 2019-01-08 4:32 p.m., Deucher, Alexander wrote:
>
> Ping? Useful for rocm-smi?
>
> ------------------------------------------------------------------------
> *From:* Alex Deucher <alexdeucher@xxxxxxxxx>
> *Sent:* Monday, December 10, 2018 4:17:27 PM
> *To:* amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> *Cc:* Deucher, Alexander
> *Subject:* [PATCH] drm/amdgpu: expose sclk and mclk via hwmon
>
> Expose sclk (gfx clock) and mclk (memory clock) via
> hwmon compatible interface. hwmon does not actually
> formally specify a frequency type attribute, but these
> are compatible with the format of the other attributes
> exposed via hwmon. Units are hertz.
>
> freq1_input - GPU gfx/compute clock in hertz
> freq2_input - GPU memory clock in hertz (dGPU only)
>
> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 93
> ++++++++++++++++++++++++++++++++++
> 1 file changed, 93 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> index 1f61ed95727c..6d52428fc45b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> @@ -1516,6 +1516,75 @@ static ssize_t
> amdgpu_hwmon_set_power_cap(struct device *dev,
> return count;
> }
>
> +static ssize_t amdgpu_hwmon_show_sclk(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct amdgpu_device *adev = dev_get_drvdata(dev);
> + struct drm_device *ddev = adev->ddev;
> + uint32_t sclk;
> + int r, size = sizeof(sclk);
> +
> + /* Can't get voltage when the card is off */
> + if ((adev->flags & AMD_IS_PX) &&
> + (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
> + return -EINVAL;
> +
> + /* sanity check PP is enabled */
> + if (!(adev->powerplay.pp_funcs &&
> + adev->powerplay.pp_funcs->read_sensor))
> + return -EINVAL;
> +
> + /* get the sclk */
> + r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_GFX_SCLK,
> + (void *)&sclk, &size);
> + if (r)
> + return r;
> +
> + return snprintf(buf, PAGE_SIZE, "%d\n", sclk * 10 * 1000);
> +}
> +
> +static ssize_t amdgpu_hwmon_show_sclk_label(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + return snprintf(buf, PAGE_SIZE, "sclk\n");
> +}
> +
> +static ssize_t amdgpu_hwmon_show_mclk(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct amdgpu_device *adev = dev_get_drvdata(dev);
> + struct drm_device *ddev = adev->ddev;
> + uint32_t mclk;
> + int r, size = sizeof(mclk);
> +
> + /* Can't get voltage when the card is off */
> + if ((adev->flags & AMD_IS_PX) &&
> + (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
> + return -EINVAL;
> +
> + /* sanity check PP is enabled */
> + if (!(adev->powerplay.pp_funcs &&
> + adev->powerplay.pp_funcs->read_sensor))
> + return -EINVAL;
> +
> + /* get the sclk */
> + r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_GFX_MCLK,
> + (void *)&mclk, &size);
> + if (r)
> + return r;
> +
> + return snprintf(buf, PAGE_SIZE, "%d\n", mclk * 10 * 1000);
> +}
> +
> +static ssize_t amdgpu_hwmon_show_mclk_label(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + return snprintf(buf, PAGE_SIZE, "mclk\n");
> +}
>
> /**
> * DOC: hwmon
> @@ -1532,6 +1601,10 @@ static ssize_t
> amdgpu_hwmon_set_power_cap(struct device *dev,
> *
> * - GPU fan
> *
> + * - GPU gfx/compute engine clock
> + *
> + * - GPU memory clock (dGPU only)
> + *
> * hwmon interfaces for GPU temperature:
> *
> * - temp1_input: the on die GPU temperature in millidegrees Celsius
> @@ -1576,6 +1649,12 @@ static ssize_t
> amdgpu_hwmon_set_power_cap(struct device *dev,
> *
> * - fan[1-*]_enable: Enable or disable the sensors.1: Enable 0: Disable
> *
> + * hwmon interfaces for GPU clocks:
> + *
> + * - freq1_input: the gfx/compute clock in hertz
> + *
> + * - freq2_input: the memory clock in hertz
> + *
> * You can use hwmon tools like sensors to view this information on
> your system.
> *
> */
> @@ -1600,6 +1679,10 @@ static SENSOR_DEVICE_ATTR(power1_average,
> S_IRUGO, amdgpu_hwmon_show_power_avg,
> 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 SENSOR_DEVICE_ATTR(freq1_input, S_IRUGO,
> amdgpu_hwmon_show_sclk, NULL, 0);
> +static SENSOR_DEVICE_ATTR(freq1_label, S_IRUGO,
> amdgpu_hwmon_show_sclk_label, NULL, 0);
> +static SENSOR_DEVICE_ATTR(freq2_input, S_IRUGO,
> amdgpu_hwmon_show_mclk, NULL, 0);
> +static SENSOR_DEVICE_ATTR(freq2_label, S_IRUGO,
> amdgpu_hwmon_show_mclk_label, NULL, 0);
>
> static struct attribute *hwmon_attributes[] = {
> &sensor_dev_attr_temp1_input.dev_attr.attr,
> @@ -1622,6 +1705,10 @@ static struct attribute *hwmon_attributes[] = {
> &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,
> + &sensor_dev_attr_freq1_input.dev_attr.attr,
> + &sensor_dev_attr_freq1_label.dev_attr.attr,
> + &sensor_dev_attr_freq2_input.dev_attr.attr,
> + &sensor_dev_attr_freq2_label.dev_attr.attr,
> NULL
> };
>
> @@ -1712,6 +1799,12 @@ static umode_t hwmon_attributes_visible(struct
> kobject *kobj,
> attr == &sensor_dev_attr_in1_label.dev_attr.attr))
> return 0;
>
> + /* no mclk on APUs */
> + if ((adev->flags & AMD_IS_APU) &&
> + (attr == &sensor_dev_attr_freq2_input.dev_attr.attr ||
> + attr == &sensor_dev_attr_freq2_label.dev_attr.attr))
> + return 0;
> +
> return effective_mode;
> }
>
> --
> 2.13.6
>
>
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