diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index adba9ea03e63..a73e1903d29b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -1368,6 +1368,29 @@ static ssize_t amdgpu_get_pcie_bw(struct device *dev, count0, count1, pcie_get_mps(adev->pdev)); } +/** + * DOC: unique_id + * + * The amdgpu driver provides a sysfs API for providing a unique ID for the GPU + * The file unique_id is used for this. + * This will provide a Unique ID that will persist from machine to machine + * + * NOTE: This will only work for GFX9 and newer. This file will be absent + * on unsupported ASICs (GFX8 and older) + */ +static ssize_t amdgpu_get_unique_id(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = ddev->dev_private; + + if (adev->unique_id) + return snprintf(buf, PAGE_SIZE, "%016llx\n", adev->unique_id); + + return 0; +} + static DEVICE_ATTR(power_dpm_state, S_IRUGO | S_IWUSR, amdgpu_get_dpm_state, amdgpu_set_dpm_state); static DEVICE_ATTR(power_dpm_force_performance_level, S_IRUGO | S_IWUSR, amdgpu_get_dpm_forced_performance_level, @@ -1418,6 +1441,7 @@ static DEVICE_ATTR(pcie_bw, S_IRUGO, amdgpu_get_pcie_bw, NULL); static DEVICE_ATTR(ppfeatures, S_IRUGO | S_IWUSR, amdgpu_get_ppfeature_status, amdgpu_set_ppfeature_status); +static DEVICE_ATTR(unique_id, S_IRUGO, amdgpu_get_unique_id, NULL); static ssize_t amdgpu_hwmon_show_temp(struct device *dev, struct device_attribute *attr, @@ -2814,6 +2838,12 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev) return ret; } } + if (adev->unique_id) + ret = device_create_file(adev->dev, &dev_attr_unique_id); + if (ret) { + DRM_ERROR("failed to create device file unique_id\n"); + return ret; + } ret = amdgpu_debugfs_pm_init(adev); if (ret) { DRM_ERROR("Failed to register debugfs file for dpm!\n"); @@ -2875,6 +2905,8 @@ void amdgpu_pm_sysfs_fini(struct amdgpu_device *adev) device_remove_file(adev->dev, &dev_attr_mem_busy_percent); if (!(adev->flags & AMD_IS_APU)) device_remove_file(adev->dev, &dev_attr_pcie_bw); + if (adev->unique_id) + device_remove_file(adev->dev, &dev_attr_unique_id); if ((adev->asic_type >= CHIP_VEGA10) && !(adev->flags & AMD_IS_APU)) device_remove_file(adev->dev, &dev_attr_ppfeatures); |