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drm/amdgpu: fix another potential cause of VM faults 

The root PD can be evicted directly after allocating it, just validate
it on first use.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-01-24 14:57:02 +01:00 committed by Alex Deucher
parent 59fd27cd2f
commit d3aab672de
1 changed files with 12 additions and 20 deletions
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32
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View File

@ -2262,12 +2262,12 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
{
const unsigned align = min(AMDGPU_VM_PTB_ALIGN_SIZE,
AMDGPU_VM_PTE_COUNT(adev) * 8);
uint64_t init_pde_value = 0, flags;
unsigned ring_instance;
struct amdgpu_ring *ring;
struct drm_sched_rq *rq;
unsigned long size;
int r, i;
u64 flags;
uint64_t init_pde_value = 0;
vm->va = RB_ROOT_CACHED;
for (i = 0; i < AMDGPU_MAX_VMHUBS; i++)
@ -2318,29 +2318,21 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
flags |= (AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
AMDGPU_GEM_CREATE_SHADOW);
r = amdgpu_bo_create(adev,
amdgpu_vm_bo_size(adev, adev->vm_manager.root_level),
align, true,
AMDGPU_GEM_DOMAIN_VRAM,
flags,
NULL, NULL, init_pde_value, &vm->root.base.bo);
size = amdgpu_vm_bo_size(adev, adev->vm_manager.root_level);
r = amdgpu_bo_create(adev, size, align, true, AMDGPU_GEM_DOMAIN_VRAM,
flags, NULL, NULL, init_pde_value,
&vm->root.base.bo);
if (r)
goto error_free_sched_entity;
r = amdgpu_bo_reserve(vm->root.base.bo, true);
if (r)
goto error_free_root;
vm->root.base.vm = vm;
list_add_tail(&vm->root.base.bo_list, &vm->root.base.bo->va);
INIT_LIST_HEAD(&vm->root.base.vm_status);
if (vm->use_cpu_for_update) {
r = amdgpu_bo_reserve(vm->root.base.bo, false);
if (r)
goto error_free_root;
r = amdgpu_bo_kmap(vm->root.base.bo, NULL);
amdgpu_bo_unreserve(vm->root.base.bo);
if (r)
goto error_free_root;
}
list_add_tail(&vm->root.base.vm_status, &vm->evicted);
amdgpu_bo_unreserve(vm->root.base.bo);
if (pasid) {
unsigned long flags;