[PATCH] drm/amdgpu: fix metadata_size for ubo ioctl queries

[Zhang, Morris]

[AMD Official Use Only - Internal Distribution Only]

Thanks for the comments! I'll separate it into two patches.

--Brs,
Morris Zhang
MLSE Linux  ML SRDC
Ext. 25147

-----Original Message-----
From: Das, Nirmoy <Nirmoy.Das at amd.com> 
Sent: Tuesday, May 25, 2021 8:15 PM
To: Zhang, Morris <Shiwu.Zhang at amd.com>; amd-gfx at lists.freedesktop.org; Das, Nirmoy <Nirmoy.Das at amd.com>
Subject: Re: [PATCH] drm/amdgpu: fix metadata_size for ubo ioctl queries


On 5/24/21 1:52 PM, Shiwu Zhang wrote:
> Although the kfd_ioctl_get_dmabuf_info() still fail it will indicate 
> the caller right metadat_size useful for the same kfd ioctl next time.
>
> v2: free the metadata buffer for sg type when to destroy BOs.
>
> Signed-off-by: Shiwu Zhang <shiwu.zhang at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 7 ++++---
>   1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c 
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index 3f85ba8222ef..e9f8701fd046 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -95,7 +95,7 @@ static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
>   	}
>   	amdgpu_bo_unref(&bo->parent);
>   
> -	if (bo->tbo.type == ttm_bo_type_device) {
> +	if (bo->tbo.type != ttm_bo_type_kernel) {
>   		ubo = to_amdgpu_bo_user(bo);
>   		kfree(ubo->metadata);
>   	}


This should be a separate patch, it is unrelated to the below hunk.


> @@ -1213,6 +1213,9 @@ int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, 
> void *buffer,
>   
>   	BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
>   	ubo = to_amdgpu_bo_user(bo);
> +	if (metadata_size)
> +		*metadata_size = ubo->metadata_size;
> +
>   	if (buffer) {
>   		if (buffer_size < ubo->metadata_size)
>   			return -EINVAL;
> @@ -1221,8 +1224,6 @@ int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
>   			memcpy(buffer, ubo->metadata, ubo->metadata_size);
>   	}
>   
> -	if (metadata_size)
> -		*metadata_size = ubo->metadata_size;
>   	if (flags)
>   		*flags = ubo->metadata_flags;
>