[PATCH] drm/amdkfd: Remove the requirement for atomic Ops on vg20

[Felix Kuehling]

On 2018-09-26 09:41 AM, Kent Russell wrote:
> From: Shaoyun Liu <Shaoyun.Liu at amd.com>
>
> Firmware have the workaround to replace the atomic Ops with read-modify-write on CP side.
> User should not expect atomic Ops on system memory works normally if system didn't not
> support it.
>
> Change-Id: I89395b099fe0931b9b3627651b512dde3149fadd
> Signed-off-by: Shaoyun Liu <Shaoyun.Liu at amd.com>
> Signed-off-by: Kent Russell <kent.russell at amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com>

> ---
>  drivers/gpu/drm/amd/amdkfd/kfd_device.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> index b0c2afb..b505bf3 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> @@ -263,7 +263,7 @@ static const struct kfd_device_info vega20_device_info = {
>  	.mqd_size_aligned = MQD_SIZE_ALIGNED,
>  	.supports_cwsr = true,
>  	.needs_iommu_device = false,
> -	.needs_pci_atomics = true,
> +	.needs_pci_atomics = false,
>  	.num_sdma_engines = 2,
>  	.num_sdma_queues_per_engine = 8,
>  };