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drm/amdgpu: Fix VM clean check method

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amdgpu_vm_make_compute is used to turn a GFX VM into a compute VM,
the prerequisite is this VM is clean. Let's check if some page tables
are already filled , while not check if some mapping is already made.

Signed-off-by: Trigger Huang <Trigger.Huang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Trigger Huang 2019-04-30 22:00:31 +08:00 committed by Alex Deucher
parent 74dcfe74b4
commit 3680624e32
1 changed files with 33 additions and 3 deletions
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36
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -2756,6 +2756,37 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
return r;
}
/**
* amdgpu_vm_check_clean_reserved - check if a VM is clean
*
* @adev: amdgpu_device pointer
* @vm: the VM to check
*
* check all entries of the root PD, if any subsequent PDs are allocated,
* it means there are page table creating and filling, and is no a clean
* VM
*
* Returns:
* 0 if this VM is clean
*/
static int amdgpu_vm_check_clean_reserved(struct amdgpu_device *adev,
struct amdgpu_vm *vm)
{
enum amdgpu_vm_level root = adev->vm_manager.root_level;
unsigned int entries = amdgpu_vm_num_entries(adev, root);
unsigned int i = 0;
if (!(vm->root.entries))
return 0;
for (i = 0; i < entries; i++) {
if (vm->root.entries[i].base.bo)
return -EINVAL;
}
return 0;
}
/**
* amdgpu_vm_make_compute - Turn a GFX VM into a compute VM
*
@ -2786,10 +2817,9 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, uns
return r;
/* Sanity checks */
if (!RB_EMPTY_ROOT(&vm->va.rb_root) || vm->root.entries) {
r = -EINVAL;
r = amdgpu_vm_check_clean_reserved(adev, vm);
if (r)
goto unreserve_bo;
}
if (pasid) {
unsigned long flags;