On Thu, Nov 1, 2018 at 1:59 AM Rex Zhu <Rex.Zhu@xxxxxxx> wrote:
>
> Get the sdma index from ring
>
> v2: refine function name
>
> Signed-off-by: Rex Zhu <Rex.Zhu@xxxxxxx>
Series is:
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c | 16 ++++++++++++++++
> drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h | 1 +
> 2 files changed, 17 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
> index c912230..115bb0c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
> @@ -40,3 +40,19 @@ struct amdgpu_sdma_instance *amdgpu_sdma_get_instance_from_ring(struct amdgpu_ri
>
> return NULL;
> }
> +
> +int amdgpu_sdma_get_index_from_ring(struct amdgpu_ring *ring, uint32_t *index)
> +{
> + struct amdgpu_device *adev = ring->adev;
> + int i;
> +
> + for (i = 0; i < adev->sdma.num_instances; i++) {
> + if (ring == &adev->sdma.instance[i].ring ||
> + ring == &adev->sdma.instance[i].page) {
> + *index = i;
> + return 0;
> + }
> + }
> +
> + return -EINVAL;
> +}
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
> index 664f549..16b1a6a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
> @@ -95,5 +95,6 @@ struct amdgpu_buffer_funcs {
>
> struct amdgpu_sdma_instance *
> amdgpu_sdma_get_instance_from_ring(struct amdgpu_ring *ring);
> +int amdgpu_sdma_get_index_from_ring(struct amdgpu_ring *ring, uint32_t *index);
>
> #endif
> --
> 1.9.1
>
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