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drm/amd/pm: Add sysfs attribute to get pm metrics

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Add sysfs attribute to read power management metrics. A snapshot is
captured to the buffer when the attribute is read.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lijo Lazar 2023-09-29 11:56:49 +05:30 committed by Alex Deucher
parent f9a45b76a1
commit 223aad1be3
1 changed files with 40 additions and 0 deletions
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40
drivers/gpu/drm/amd/pm/amdgpu_pm.c
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@ -1799,6 +1799,44 @@ static ssize_t amdgpu_set_apu_thermal_cap(struct device *dev,
return count;
}
static int amdgpu_pm_metrics_attr_update(struct amdgpu_device *adev,
struct amdgpu_device_attr *attr,
uint32_t mask,
enum amdgpu_device_attr_states *states)
{
if (amdgpu_dpm_get_pm_metrics(adev, NULL, 0) == -EOPNOTSUPP)
*states = ATTR_STATE_UNSUPPORTED;
return 0;
}
static ssize_t amdgpu_get_pm_metrics(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
ssize_t size = 0;
int ret;
if (amdgpu_in_reset(adev))
return -EPERM;
if (adev->in_suspend && !adev->in_runpm)
return -EPERM;
ret = pm_runtime_get_sync(ddev->dev);
if (ret < 0) {
pm_runtime_put_autosuspend(ddev->dev);
return ret;
}
size = amdgpu_dpm_get_pm_metrics(adev, buf, PAGE_SIZE);
pm_runtime_mark_last_busy(ddev->dev);
pm_runtime_put_autosuspend(ddev->dev);
return size;
}
/**
* DOC: gpu_metrics
*
@ -2096,6 +2134,8 @@ static struct amdgpu_device_attr amdgpu_device_attrs[] = {
AMDGPU_DEVICE_ATTR_RW(smartshift_bias, ATTR_FLAG_BASIC,
.attr_update = ss_bias_attr_update),
AMDGPU_DEVICE_ATTR_RW(xgmi_plpd_policy, ATTR_FLAG_BASIC),
AMDGPU_DEVICE_ATTR_RO(pm_metrics, ATTR_FLAG_BASIC,
.attr_update = amdgpu_pm_metrics_attr_update),
};
static int default_attr_update(struct amdgpu_device *adev, struct amdgpu_device_attr *attr,