[PATCH] drm/amdkfd: enable heavy-weight TLB flush on Vega20

[Alex Deucher]

On Fri, Jan 21, 2022 at 11:17 AM Eric Huang <jinhuieric.huang at amd.com> wrote:
>
> It is to meet the requirement for memory allocation
> optimization on MI50.
>
> Signed-off-by: Eric Huang <jinhuieric.huang at amd.com>

Assuming there is no firmware version requirement, the patch is:
Acked-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> index 5b8ae0795c0a..d708f1a502cf 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> @@ -1582,7 +1582,8 @@ static int kfd_ioctl_free_memory_of_gpu(struct file *filep,
>  static bool kfd_flush_tlb_after_unmap(struct kfd_dev *dev) {
>         return KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 2) ||
>                (KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 1) &&
> -               dev->adev->sdma.instance[0].fw_version >= 18);
> +               dev->adev->sdma.instance[0].fw_version >= 18) ||
> +               KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 0);
>  }
>
>  static int kfd_ioctl_map_memory_to_gpu(struct file *filep,
> --
> 2.25.1
>