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drm/amdgpu: add some extra VM error handling

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If updating the PDs fails we now invalidate all entries to try again later.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2017-05-12 16:09:26 +02:00 committed by Alex Deucher
parent b116632557
commit 92456b933c
1 changed files with 33 additions and 1 deletions
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34
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -1103,6 +1103,32 @@ error_free:
return r;
}
/*
* amdgpu_vm_invalidate_level - mark all PD levels as invalid
*
* @parent: parent PD
*
* Mark all PD level as invalid after an error.
*/
static void amdgpu_vm_invalidate_level(struct amdgpu_vm_pt *parent)
{
unsigned pt_idx;
/*
* Recurse into the subdirectories. This recursion is harmless because
* we only have a maximum of 5 layers.
*/
for (pt_idx = 0; pt_idx <= parent->last_entry_used; ++pt_idx) {
struct amdgpu_vm_pt *entry = &parent->entries[pt_idx];
if (!entry->bo)
continue;
entry->addr = ~0ULL;
amdgpu_vm_invalidate_level(entry);
}
}
/*
* amdgpu_vm_update_directories - make sure that all directories are valid
*
@ -1115,7 +1141,13 @@ error_free:
int amdgpu_vm_update_directories(struct amdgpu_device *adev,
struct amdgpu_vm *vm)
{
return amdgpu_vm_update_level(adev, vm, &vm->root, 0);
int r;
r = amdgpu_vm_update_level(adev, vm, &vm->root, 0);
if (r)
amdgpu_vm_invalidate_level(&vm->root);
return r;
}
/**