[PATCH] drm/amdgpu: set gfx9 onwards APU atomics support to be true

[Felix Kuehling]

Am 2023-04-29 um 22:02 schrieb Yifan Zhang:
> APUs w/ gfx9 onwards doesn't reply on PCIe atomics, rather
> it is internal path w/ native atomic support. Set have_atomics_support
> to true.
>
> Signed-off-by: Yifan Zhang <yifan1.zhang at amd.com>

Acked-by: Felix Kuehling <Felix.Kuehling at amd.com>


> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index b57e7776055b..750eaffa81ba 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -3757,6 +3757,12 @@ int amdgpu_device_init(struct amdgpu_device *adev,
>   		adev->have_atomics_support = ((struct amd_sriov_msg_pf2vf_info *)
>   			adev->virt.fw_reserve.p_pf2vf)->pcie_atomic_ops_support_flags ==
>   			(PCI_EXP_DEVCAP2_ATOMIC_COMP32 | PCI_EXP_DEVCAP2_ATOMIC_COMP64);
> +	/* APUs w/ gfx9 onwards doesn't reply on PCIe atomics, rather it is a
> +	 * internal path natively support atomics, set have_atomics_support to true.
> +	 */
> +	else if ((adev->flags & AMD_IS_APU) &&
> +		(adev->ip_versions[GC_HWIP][0] > IP_VERSION(9, 0, 0)))
> +		adev->have_atomics_support = true;
>   	else
>   		adev->have_atomics_support =
>   			!pci_enable_atomic_ops_to_root(adev->pdev,