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From 180989954bbfe805018af7138314f70c55356215 Mon Sep 17 00:00:00 2001
From: Christian Koenig <christian.koenig@amd.com>
Date: Wed, 24 Jan 2018 14:57:02 +0100
Subject: [PATCH 3292/4131] drm/amdgpu: fix another potential cause of VM
faults
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 32 ++++++++++++--------------------
1 file changed, 12 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 59abde3..de11ed9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2274,12 +2274,12 @@ 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++)
@@ -2330,29 +2330,21 @@ 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;
--
2.7.4
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