On Tue, Aug 6, 2019 at 10:56 PM Tao Zhou <tao.zhou1@xxxxxxx> wrote:
>
> readq/writeq are not supported on all architectures
>
> Signed-off-by: Tao Zhou <tao.zhou1@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 8 ++------
> 1 file changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 558fe6d091ed..7eb9e0b9235a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -272,14 +272,10 @@ void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
> */
> uint64_t amdgpu_mm_rreg64(struct amdgpu_device *adev, uint32_t reg)
> {
> - uint64_t ret;
> -
> if ((reg * 4) < adev->rmmio_size)
> - ret = readq(((void __iomem *)adev->rmmio) + (reg * 4));
> + return atomic64_read((atomic64_t *)(adev->rmmio + (reg * 4)));
> else
> BUG();
> -
> - return ret;
> }
>
> /**
> @@ -294,7 +290,7 @@ uint64_t amdgpu_mm_rreg64(struct amdgpu_device *adev, uint32_t reg)
> void amdgpu_mm_wreg64(struct amdgpu_device *adev, uint32_t reg, uint64_t v)
> {
> if ((reg * 4) < adev->rmmio_size)
> - writeq(v, ((void __iomem *)adev->rmmio) + (reg * 4));
> + atomic64_set((atomic64_t *)(adev->rmmio + (reg * 4)), v);
> else
> BUG();
> }
> --
> 2.17.1
>
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