On 2022-06-14 05:03, Lang Yu wrote:
We don't need to validate and map root PD specially here,
it would be validated and mapped by amdgpu_vm_validate_pt_bos
if it is evicted.
The special case is when turning a GFX VM to a compute VM,
if vm_update_mode changed, we should make sure root PD gets
mapped. So just map root PD after updating vm->update_funcs
in amdgpu_vm_make_compute whether the vm_update_mode changed
or not.
v3:
- Add some comments suggested by Christian.
v2:
- Don't rename vm_validate_pt_pd_bos and make it public.
Signed-off-by: Lang Yu <Lang.Yu@xxxxxxx>
Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 14 --------------
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 8 ++++++++
2 files changed, 8 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 50bb590c3306..c9ef242177e2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -439,22 +439,8 @@ static int vm_validate_pt_pd_bos(struct amdgpu_vm *vm)
return ret;
}
- ret = amdgpu_amdkfd_validate_vm_bo(NULL, pd);
- if (ret) {
- pr_err("failed to validate PD\n");
- return ret;
- }
-
vm->pd_phys_addr = amdgpu_gmc_pd_addr(vm->root.bo);
- if (vm->use_cpu_for_update) {
- ret = amdgpu_bo_kmap(pd, NULL);
- if (ret) {
- pr_err("failed to kmap PD, ret=%d\n", ret);
- return ret;
- }
- }
-
return 0;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 703552f9a6d7..3a6b827e540c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2225,6 +2225,14 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm)
} else {
vm->update_funcs = &amdgpu_vm_sdma_funcs;
}
+ /*
+ * Make sure root PD gets mapped. As vm_update_mode could be changed
+ * when turning a GFX VM into a compute VM.
+ */
+ r = vm->update_funcs->map_table(to_amdgpu_bo_vm(vm->root.bo));
+ if (r)
+ goto unreserve_bo;
+
dma_fence_put(vm->last_update);
vm->last_update = NULL;
vm->is_compute_context = true;
