[PATCH] drm/amdgpu: new ids flag for tmz

[Christian König]

Am 30.07.20 um 12:25 schrieb Pierre-Eric Pelloux-Prayer:
> Allows UMD to know if TMZ is supported and enabled.
> This commit also bumps KMS_DRIVER_MINOR so UMD knows if it can rely on
> AMDGPU_IDS_FLAGS_TMZ.
> ---
> Patch for using it in Mesa is at https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6049
> (ac/gpu_info: add detection of TMZ support).
>
> Pierre-Eric
>
>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 3 ++-
>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 2 ++
>   include/uapi/drm/amdgpu_drm.h           | 1 +
>   3 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index 6291f5f0d223..6dcab25914cf 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -88,9 +88,10 @@
>    * - 3.37.0 - L2 is invalidated before SDMA IBs, needed for correctness
>    * - 3.38.0 - Add AMDGPU_IB_FLAG_EMIT_MEM_SYNC
>    * - 3.39.0 - DMABUF implicit sync does a full pipeline sync
> + * - 3.40.0 - Add AMDGPU_IDS_FLAGS_TMZ
>    */
>   #define KMS_DRIVER_MAJOR	3
> -#define KMS_DRIVER_MINOR	39
> +#define KMS_DRIVER_MINOR	40

I don't think we need this. Unused ids_flags should be zero on older 
kernels.

That's why we have this in the first place.

Christian.

>   #define KMS_DRIVER_PATCHLEVEL	0
>   
>   int amdgpu_vram_limit = 0;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> index eebbe2103e32..d92ee30bc06c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> @@ -736,6 +736,8 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
>   			dev_info.ids_flags |= AMDGPU_IDS_FLAGS_FUSION;
>   		if (amdgpu_mcbp || amdgpu_sriov_vf(adev))
>   			dev_info.ids_flags |= AMDGPU_IDS_FLAGS_PREEMPTION;
> +		if (adev->gmc.tmz_enabled)
> +			dev_info.ids_flags |= AMDGPU_IDS_FLAGS_TMZ;
>   
>   		vm_size = adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE;
>   		vm_size -= AMDGPU_VA_RESERVED_SIZE;
> diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
> index 765a94ec4420..b826f2d6efe1 100644
> --- a/include/uapi/drm/amdgpu_drm.h
> +++ b/include/uapi/drm/amdgpu_drm.h
> @@ -676,6 +676,7 @@ struct drm_amdgpu_cs_chunk_data {
>    */
>   #define AMDGPU_IDS_FLAGS_FUSION         0x1
>   #define AMDGPU_IDS_FLAGS_PREEMPTION     0x2
> +#define AMDGPU_IDS_FLAGS_TMZ            0x4
>   
>   /* indicate if acceleration can be working */
>   #define AMDGPU_INFO_ACCEL_WORKING		0x00