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drm/amdgpu: Add helper function to get sdma index 

Get the sdma index from ring

v2: refine function name

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Flora Cui <flora.cui@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rex Zhu 2018-10-31 19:49:27 +08:00 committed by Alex Deucher
parent ccf191f8aa
commit f6cffc0d4d
2 changed files with 17 additions and 0 deletions
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16
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
View File

@ -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;
}

1
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
View File

@ -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