[PATCH libdrm] amdgpu: update the exported always on CU bitmap

[Christian König]

Am 26.06.2017 um 08:12 schrieb Flora Cui:
> keep cu_ao_mask unchanged for backward compatibility.
>
> Change-Id: I9f497aadd309977468e246fea333b392c0150276
> Signed-off-by: Flora Cui <Flora.Cui at amd.com>
> ---
> This patch should be landed after the kmd patch upsteam. right?

In general yes, but this patch is a NAK as well.

>   amdgpu/amdgpu.h          | 2 ++
>   amdgpu/amdgpu_gpu_info.c | 1 +
>   include/drm/amdgpu_drm.h | 3 +++
>   3 files changed, 6 insertions(+)
>
> diff --git a/amdgpu/amdgpu.h b/amdgpu/amdgpu.h
> index b6779f9..cc80493 100644
> --- a/amdgpu/amdgpu.h
> +++ b/amdgpu/amdgpu.h
> @@ -486,7 +486,9 @@ struct amdgpu_gpu_info {
>   	uint32_t pa_sc_raster_cfg1[4];
>   	/* CU info */
>   	uint32_t cu_active_number;
> +	/* NOTE: cu_ao_mask is INVALID, DON'T use it */
>   	uint32_t cu_ao_mask;
> +	uint32_t cu_ao_bitmap[4][4];
>   	uint32_t cu_bitmap[4][4];

You can't change the amdgpu_gpu_info structure here for the same reasons 
you can't change the kernel interface.

Even worse in oposite to the kernel interface this structure isn't 
versionized, so you can't change it at all.

I suggest that we deprecate amdgpu_gpu_info and clients just call the 
appropriate info query directly.

Regards,
Christian.

>   	/* video memory type info*/
>   	uint32_t vram_type;
> diff --git a/amdgpu/amdgpu_gpu_info.c b/amdgpu/amdgpu_gpu_info.c
> index 34f77be..7a5feb9 100644
> --- a/amdgpu/amdgpu_gpu_info.c
> +++ b/amdgpu/amdgpu_gpu_info.c
> @@ -230,6 +230,7 @@ drm_private int amdgpu_query_gpu_info_init(amdgpu_device_handle dev)
>   
>   	dev->info.cu_active_number = dev->dev_info.cu_active_number;
>   	dev->info.cu_ao_mask = dev->dev_info.cu_ao_mask;
> +	memcpy(&dev->info.cu_ao_bitmap[0][0], &dev->dev_info.cu_ao_bitmap[0][0], sizeof(dev->info.cu_ao_bitmap));
>   	memcpy(&dev->info.cu_bitmap[0][0], &dev->dev_info.cu_bitmap[0][0], sizeof(dev->info.cu_bitmap));
>   
>   	/* TODO: info->max_quad_shader_pipes is not set */
> diff --git a/include/drm/amdgpu_drm.h b/include/drm/amdgpu_drm.h
> index df250de..05c4e72 100644
> --- a/include/drm/amdgpu_drm.h
> +++ b/include/drm/amdgpu_drm.h
> @@ -832,6 +832,7 @@ struct drm_amdgpu_info_device {
>   	__u64 max_memory_clock;
>   	/* cu information */
>   	__u32 cu_active_number;
> +	/* NOTE: cu_ao_mask is INVALID, DON'T use it */
>   	__u32 cu_ao_mask;
>   	__u32 cu_bitmap[4][4];
>   	/** Render backend pipe mask. One render backend is CB+DB. */
> @@ -886,6 +887,8 @@ struct drm_amdgpu_info_device {
>   	/* max gs wavefront per vgt*/
>   	__u32 max_gs_waves_per_vgt;
>   	__u32 _pad1;
> +	/* always on cu bitmap */
> +	__u32 cu_ao_bitmap[4][4];
>   };
>   
>   struct drm_amdgpu_info_hw_ip {