On 2018-09-26 09:41 AM, Kent Russell wrote:
> From: Shaoyun Liu <[email protected]>
>
> 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 <[email protected]>
> Signed-off-by: Kent Russell <[email protected]>
Reviewed-by: Felix Kuehling <[email protected]>
> ---
> 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,
> };
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