[PATCH] drm/amd/amdgpu: Update VM function pointer When VM state changed and system in large bar mode, make sure to use CPU update function, otherwise use SDMA function.

Gang Ba gaba at amd.com
Wed Aug 14 17:33:48 UTC 2019


Change-Id: Ibcfada560a00c9aeebfd922ae48de920e44a5866
Signed-off-by: Gang Ba <gaba at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index c1baf3d..7ddca3e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2862,6 +2862,13 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, uns
 	WARN_ONCE((vm->use_cpu_for_update && !amdgpu_gmc_vram_full_visible(&adev->gmc)),
 		  "CPU update of VM recommended only for large BAR system\n");
 
+	if (vm->use_cpu_for_update)
+		vm->update_funcs = &amdgpu_vm_cpu_funcs;
+	else
+		vm->update_funcs = &amdgpu_vm_sdma_funcs;
+	dma_fence_put(vm->last_update);
+	vm->last_update = NULL;
+
 	if (vm->pasid) {
 		unsigned long flags;
 
-- 
2.7.4



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