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drm/amdgpu: use dfs iterator to free PDs/PTs

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Allows us to free all PDs/PTs without recursion.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-09-06 15:35:13 +02:00 • committed by Alex Deucher
parent d72a6887ee
commit 229a37f834
1 changed files with 30 additions and 32 deletions
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62
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View file

@ -937,6 +937,35 @@ error_free_pt:
return r;
}
/**
* amdgpu_vm_free_pts - free PD/PT levels
*
* @adev: amdgpu device structure
* @parent: PD/PT starting level to free
* @level: level of parent structure
*
* Free the page directory or page table level and all sub levels.
*/
static void amdgpu_vm_free_pts(struct amdgpu_device *adev,
struct amdgpu_vm *vm)
{
struct amdgpu_vm_pt_cursor cursor;
struct amdgpu_vm_pt *entry;
for_each_amdgpu_vm_pt_dfs_safe(adev, vm, cursor, entry) {
if (entry->base.bo) {
list_del(&entry->base.bo_list);
list_del(&entry->base.vm_status);
amdgpu_bo_unref(&entry->base.bo->shadow);
amdgpu_bo_unref(&entry->base.bo);
}
kvfree(entry->entries);
}
BUG_ON(vm->root.base.bo);
}
/**
* amdgpu_vm_check_compute_bug - check whether asic has compute vm bug
*
@ -3147,36 +3176,6 @@ void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm)
vm->pasid = 0;
}
/**
* amdgpu_vm_free_levels - free PD/PT levels
*
* @adev: amdgpu device structure
* @parent: PD/PT starting level to free
* @level: level of parent structure
*
* Free the page directory or page table level and all sub levels.
*/
static void amdgpu_vm_free_levels(struct amdgpu_device *adev,
struct amdgpu_vm_pt *parent,
unsigned level)
{
unsigned i, num_entries = amdgpu_vm_num_entries(adev, level);
if (parent->base.bo) {
list_del(&parent->base.bo_list);
list_del(&parent->base.vm_status);
amdgpu_bo_unref(&parent->base.bo->shadow);
amdgpu_bo_unref(&parent->base.bo);
}
if (parent->entries)
for (i = 0; i < num_entries; i++)
amdgpu_vm_free_levels(adev, &parent->entries[i],
level + 1);
kvfree(parent->entries);
}
/**
* amdgpu_vm_fini - tear down a vm instance
*
@ -3237,8 +3236,7 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
if (r) {
dev_err(adev->dev, "Leaking page tables because BO reservation failed\n");
} else {
amdgpu_vm_free_levels(adev, &vm->root,
adev->vm_manager.root_level);
amdgpu_vm_free_pts(adev, vm);
amdgpu_bo_unreserve(root);
}
amdgpu_bo_unref(&root);