drm/amdgpu: add amdgpu_get_sdma_instance helper function
This function is added to map the ring to sdma instance
Signed-off-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 0be51f99..057e7ef 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -2199,6 +2199,21 @@
ring->ring_free_dw--;
}
+static inline struct amdgpu_sdma * amdgpu_get_sdma_instance(struct amdgpu_ring *ring)
+{
+ struct amdgpu_device *adev = ring->adev;
+ int i;
+
+ for (i = 0; i < AMDGPU_MAX_SDMA_INSTANCES; i++)
+ if (&adev->sdma[i].ring == ring)
+ break;
+
+ if (i < AMDGPU_MAX_SDMA_INSTANCES)
+ return &adev->sdma[i];
+ else
+ return NULL;
+}
+
/*
* ASICs macro.
*/