drm/amdgpu: use SDMA round robin for VM updates v3

Distribute the load on both rings.

v2: use a loop for the initialization
v3: agd: rebase on upstream

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
index 4ae1058c96c6..c895af79d4bb 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
@@ -1376,8 +1376,14 @@ static const struct amdgpu_vm_pte_funcs sdma_v2_4_vm_pte_funcs = {
 
 static void sdma_v2_4_set_vm_pte_funcs(struct amdgpu_device *adev)
 {
+	unsigned i;
+
 	if (adev->vm_manager.vm_pte_funcs == NULL) {
 		adev->vm_manager.vm_pte_funcs = &sdma_v2_4_vm_pte_funcs;
-		adev->vm_manager.vm_pte_funcs_ring = &adev->sdma.instance[0].ring;
+		for (i = 0; i < adev->sdma.num_instances; i++)
+			adev->vm_manager.vm_pte_rings[i] =
+				&adev->sdma.instance[i].ring;
+
+		adev->vm_manager.vm_pte_num_rings = adev->sdma.num_instances;
 	}
 }