diff options
| author | Kun Liu <Kun.Liu2@amd.com> | 2023-02-21 16:31:18 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-02-23 17:36:00 -0500 |
| commit | c3ed0e72c872901659ed0fef4b91eb6ab7dc6aad (patch) | |
| tree | 2a926d04a792051d5546285199e2b0849c977d3d /drivers/gpu/drm/amd/pm/amdgpu_pm.c | |
| parent | 4f101d5710a84f334b05a96713000ce8dfd4d598 (diff) | |
drm/amdgpu: added a sysfs interface for thermal throttling
added a sysfs interface for thermal throttling, then userspace
can get/update thermal limit
Signed-off-by: Kun Liu <Kun.Liu2@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/pm/amdgpu_pm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/pm/amdgpu_pm.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c index bf6d63673b5a..f212cae0353f 100644 --- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c @@ -1686,6 +1686,82 @@ static ssize_t amdgpu_set_thermal_throttling_logging(struct device *dev, } /** + * DOC: apu_thermal_cap + * + * The amdgpu driver provides a sysfs API for retrieving/updating thermal + * limit temperature in millidegrees Celsius + * + * Reading back the file shows you core limit value + * + * Writing an integer to the file, sets a new thermal limit. The value + * should be between 0 and 100. If the value is less than 0 or greater + * than 100, then the write request will be ignored. + */ +static ssize_t amdgpu_get_apu_thermal_cap(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int ret, size; + u32 limit; + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = drm_to_adev(ddev); + + ret = pm_runtime_get_sync(ddev->dev); + if (ret < 0) { + pm_runtime_put_autosuspend(ddev->dev); + return ret; + } + + ret = amdgpu_dpm_get_apu_thermal_limit(adev, &limit); + if (!ret) + size = sysfs_emit(buf, "%u\n", limit); + else + size = sysfs_emit(buf, "failed to get thermal limit\n"); + + pm_runtime_mark_last_busy(ddev->dev); + pm_runtime_put_autosuspend(ddev->dev); + + return size; +} + +static ssize_t amdgpu_set_apu_thermal_cap(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + int ret; + u32 value; + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = drm_to_adev(ddev); + + ret = kstrtou32(buf, 10, &value); + if (ret) + return ret; + + if (value < 0 || value > 100) { + dev_err(dev, "Invalid argument !\n"); + return -EINVAL; + } + + ret = pm_runtime_get_sync(ddev->dev); + if (ret < 0) { + pm_runtime_put_autosuspend(ddev->dev); + return ret; + } + + ret = amdgpu_dpm_set_apu_thermal_limit(adev, value); + if (ret) { + dev_err(dev, "failed to update thermal limit\n"); + return ret; + } + + pm_runtime_mark_last_busy(ddev->dev); + pm_runtime_put_autosuspend(ddev->dev); + + return count; +} + +/** * DOC: gpu_metrics * * The amdgpu driver provides a sysfs API for retrieving current gpu @@ -1937,6 +2013,7 @@ static struct amdgpu_device_attr amdgpu_device_attrs[] = { AMDGPU_DEVICE_ATTR_RW(pp_features, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF), AMDGPU_DEVICE_ATTR_RO(unique_id, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF), AMDGPU_DEVICE_ATTR_RW(thermal_throttling_logging, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF), + AMDGPU_DEVICE_ATTR_RW(apu_thermal_cap, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF), AMDGPU_DEVICE_ATTR_RO(gpu_metrics, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF), AMDGPU_DEVICE_ATTR_RO(smartshift_apu_power, ATTR_FLAG_BASIC, .attr_update = ss_power_attr_update), |