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drm/amdgpu: fix TTM move entity init order

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We are initializing the entity before the scheduler is actually
initialized.

This can lead to all kind of problem, but especially NULL pointer deref
because of Nayan's scheduler work.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-07-12 14:31:25 +02:00 committed by Alex Deucher
parent 44a99b65fc
commit b7d85e1db3
1 changed files with 21 additions and 16 deletions
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37
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
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@ -104,8 +104,6 @@ static void amdgpu_ttm_mem_global_release(struct drm_global_reference *ref)
static int amdgpu_ttm_global_init(struct amdgpu_device *adev)
{
struct drm_global_reference *global_ref;
struct amdgpu_ring *ring;
struct drm_sched_rq *rq;
int r;
/* ensure reference is false in case init fails */
@ -138,21 +136,10 @@ static int amdgpu_ttm_global_init(struct amdgpu_device *adev)
mutex_init(&adev->mman.gtt_window_lock);
ring = adev->mman.buffer_funcs_ring;
rq = &ring->sched.sched_rq[DRM_SCHED_PRIORITY_KERNEL];
r = drm_sched_entity_init(&ring->sched, &adev->mman.entity,
rq, NULL);
if (r) {
DRM_ERROR("Failed setting up TTM BO move run queue.\n");
goto error_entity;
}
adev->mman.mem_global_referenced = true;
return 0;
error_entity:
drm_global_item_unref(&adev->mman.bo_global_ref.ref);
error_bo:
drm_global_item_unref(&adev->mman.mem_global_ref);
error_mem:
@ -162,8 +149,6 @@ static int amdgpu_ttm_global_init(struct amdgpu_device *adev)
static void amdgpu_ttm_global_fini(struct amdgpu_device *adev)
{
if (adev->mman.mem_global_referenced) {
drm_sched_entity_destroy(adev->mman.entity.sched,
&adev->mman.entity);
mutex_destroy(&adev->mman.gtt_window_lock);
drm_global_item_unref(&adev->mman.bo_global_ref.ref);
drm_global_item_unref(&adev->mman.mem_global_ref);
@ -1921,10 +1906,30 @@ void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
{
struct ttm_mem_type_manager *man = &adev->mman.bdev.man[TTM_PL_VRAM];
uint64_t size;
int r;
if (!adev->mman.initialized || adev->in_gpu_reset)
if (!adev->mman.initialized || adev->in_gpu_reset ||
adev->mman.buffer_funcs_enabled == enable)
return;
if (enable) {
struct amdgpu_ring *ring;
struct drm_sched_rq *rq;
ring = adev->mman.buffer_funcs_ring;
rq = &ring->sched.sched_rq[DRM_SCHED_PRIORITY_KERNEL];
r = drm_sched_entity_init(&ring->sched, &adev->mman.entity,
rq, NULL);
if (r) {
DRM_ERROR("Failed setting up TTM BO move entity (%d)\n",
r);
return;
}
} else {
drm_sched_entity_destroy(adev->mman.entity.sched,
&adev->mman.entity);
}
/* this just adjusts TTM size idea, which sets lpfn to the correct value */
if (enable)
size = adev->gmc.real_vram_size;