[PATCH] drm/amdgpu: clean up ras sysfs creation (v2)

[Christian König]

Am 24.09.20 um 16:51 schrieb Guchun Chen:
> Merge ras sysfs creation together by calling sysfs_create_group
> once, as sysfs_update_group may not work properly as expected.
>
> v2: improve commit message
>
> Signed-off-by: Guchun Chen <guchun.chen at amd.com>

Acked-by: Christian König <christian.koenig at amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 87 +++++++++----------------
>   1 file changed, 31 insertions(+), 56 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> index e5ea14774c0c..6c57521b21fe 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> @@ -1027,58 +1027,6 @@ static ssize_t amdgpu_ras_sysfs_features_read(struct device *dev,
>   	return scnprintf(buf, PAGE_SIZE, "feature mask: 0x%x\n", con->features);
>   }
>   
> -static void amdgpu_ras_sysfs_add_bad_page_node(struct amdgpu_device *adev)
> -{
> -	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
> -	struct attribute_group group;
> -	struct bin_attribute *bin_attrs[] = {
> -		&con->badpages_attr,
> -		NULL,
> -	};
> -
> -	con->badpages_attr = (struct bin_attribute) {
> -		.attr = {
> -			.name = "gpu_vram_bad_pages",
> -			.mode = S_IRUGO,
> -		},
> -		.size = 0,
> -		.private = NULL,
> -		.read = amdgpu_ras_sysfs_badpages_read,
> -	};
> -
> -	group.name = RAS_FS_NAME;
> -	group.bin_attrs = bin_attrs;
> -
> -	sysfs_bin_attr_init(bin_attrs[0]);
> -
> -	sysfs_update_group(&adev->dev->kobj, &group);
> -}
> -
> -static int amdgpu_ras_sysfs_create_feature_node(struct amdgpu_device *adev)
> -{
> -	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
> -	struct attribute *attrs[] = {
> -		&con->features_attr.attr,
> -		NULL
> -	};
> -	struct attribute_group group = {
> -		.name = RAS_FS_NAME,
> -		.attrs = attrs,
> -	};
> -
> -	con->features_attr = (struct device_attribute) {
> -		.attr = {
> -			.name = "features",
> -			.mode = S_IRUGO,
> -		},
> -			.show = amdgpu_ras_sysfs_features_read,
> -	};
> -
> -	sysfs_attr_init(attrs[0]);
> -
> -	return sysfs_create_group(&adev->dev->kobj, &group);
> -}
> -
>   static void amdgpu_ras_sysfs_remove_bad_page_node(struct amdgpu_device *adev)
>   {
>   	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
> @@ -1300,13 +1248,40 @@ static void amdgpu_ras_debugfs_remove_all(struct amdgpu_device *adev)
>   /* debugfs end */
>   
>   /* ras fs */
> -
> +static BIN_ATTR(gpu_vram_bad_pages, S_IRUGO,
> +		amdgpu_ras_sysfs_badpages_read, NULL, 0);
> +static DEVICE_ATTR(features, S_IRUGO,
> +		amdgpu_ras_sysfs_features_read, NULL);
>   static int amdgpu_ras_fs_init(struct amdgpu_device *adev)
>   {
> -	amdgpu_ras_sysfs_create_feature_node(adev);
> +	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
> +	struct attribute_group group = {
> +		.name = RAS_FS_NAME,
> +	};
> +	struct attribute *attrs[] = {
> +		&con->features_attr.attr,
> +		NULL
> +	};
> +	struct bin_attribute *bin_attrs[] = {
> +		NULL,
> +		NULL,
> +	};
>   
> -	if (amdgpu_bad_page_threshold != 0)
> -		amdgpu_ras_sysfs_add_bad_page_node(adev);
> +	/* add features entry */
> +	con->features_attr = dev_attr_features;
> +	group.attrs = attrs;
> +	sysfs_attr_init(attrs[0]);
> +
> +	if (amdgpu_bad_page_threshold != 0) {
> +		/* add bad_page_features entry */
> +		bin_attr_gpu_vram_bad_pages.private = NULL;
> +		con->badpages_attr = bin_attr_gpu_vram_bad_pages;
> +		bin_attrs[0] = &con->badpages_attr;
> +		group.bin_attrs = bin_attrs;
> +		sysfs_bin_attr_init(bin_attrs[0]);
> +	}
> +
> +	sysfs_create_group(&adev->dev->kobj, &group);
>   
>   	return 0;
>   }