[PATCH 1/1] drm/amdgpu: add helper function for vm pasid
Das, Nirmoy
nirmoy.das at amd.com
Mon Jun 21 11:41:54 UTC 2021
On 6/21/2021 1:35 PM, Christian König wrote:
> Am 21.06.21 um 13:27 schrieb Das, Nirmoy:
>>
>> On 6/21/2021 1:18 PM, Christian König wrote:
>>> Am 21.06.21 um 13:10 schrieb Das, Nirmoy:
>>>>
>>>> On 6/21/2021 12:59 PM, Christian König wrote:
>>>>> Am 21.06.21 um 12:56 schrieb Das, Nirmoy:
>>>>>>
>>>>>> On 6/21/2021 12:26 PM, Christian König wrote:
>>>>>>> Well you completely break the handling in
>>>>>>> amdgpu_vm_handle_fault() with this.
>>>>>>
>>>>>>
>>>>>> I see one issue with: if (!vm || (vm && vm->root.bo != root)) .
>>>>>> I will split it and resend.
>>>>>>
>>>>>> Am I missing something else ?
>>>>>
>>>>> The problem is you drop and re-take the lock now at the wrong time.
>>>>
>>>>
>>>> I see the problem.
>>>>
>>>>>
>>>>> I don't think what you try to do here is possible at all.
>>>>
>>>>
>>>> Does it makes sense to resend without amdgpu_vm_handle_fault()
>>>> changes ?
>>>
>>> Some other changes don't make sense to me as well.
>>>
>>> For example:
>>>
>>> pasid = amdgpu_pasid_alloc(16);
>>>
>>> Why do you want to allocate a hard coded pasid number here?
>>
>>
>> This is from original amdgpu_driver_open_kms(). We are allocating a
>> pasid number and passing that to
>>
>> amdgpu_vm_init(). I wanted to move that to vmcode with this patch.
>
> That doesn't make sense.
>
> The pasid is a hardware identify which is unrelated to the VM in
> general and might at some point passed in from external.
>
Ok, makes sense. I will remove that part then.
Nirmoy
> Please keep that as parameter to the VM code if possible.
>
> Christian.
>
>>
>>
>> Regards,
>>
>> Nirmoy
>>
>>
>>>
>>> Christian.
>>>
>>>
>>>>
>>>>>
>>>>> Christian.
>>>>>
>>>>>>
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Nirmoy
>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>>> Christian.
>>>>>>>
>>>>>>> Am 21.06.21 um 11:47 schrieb Das, Nirmoy:
>>>>>>>> ping.
>>>>>>>>
>>>>>>>> On 6/17/2021 3:03 PM, Nirmoy Das wrote:
>>>>>>>>> Cleanup code related to vm pasid by adding helper function.
>>>>>>>>> This reduces lots code duplication.
>>>>>>>>>
>>>>>>>>> Signed-off-by: Nirmoy Das <nirmoy.das at amd.com>
>>>>>>>>> ---
>>>>>>>>> drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 17 +--
>>>>>>>>> drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 176
>>>>>>>>> ++++++++++++------------
>>>>>>>>> drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 2 +-
>>>>>>>>> 3 files changed, 96 insertions(+), 99 deletions(-)
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>>>>>> index cbb932f97355..27851fb0e25b 100644
>>>>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>>>>>>>> @@ -1149,7 +1149,7 @@ int amdgpu_driver_open_kms(struct
>>>>>>>>> drm_device *dev, struct drm_file *file_priv)
>>>>>>>>> {
>>>>>>>>> struct amdgpu_device *adev = drm_to_adev(dev);
>>>>>>>>> struct amdgpu_fpriv *fpriv;
>>>>>>>>> - int r, pasid;
>>>>>>>>> + int r;
>>>>>>>>> /* Ensure IB tests are run on ring */
>>>>>>>>> flush_delayed_work(&adev->delayed_init_work);
>>>>>>>>> @@ -1172,15 +1172,9 @@ int amdgpu_driver_open_kms(struct
>>>>>>>>> drm_device *dev, struct drm_file *file_priv)
>>>>>>>>> goto out_suspend;
>>>>>>>>> }
>>>>>>>>> - pasid = amdgpu_pasid_alloc(16);
>>>>>>>>> - if (pasid < 0) {
>>>>>>>>> - dev_warn(adev->dev, "No more PASIDs available!");
>>>>>>>>> - pasid = 0;
>>>>>>>>> - }
>>>>>>>>> -
>>>>>>>>> - r = amdgpu_vm_init(adev, &fpriv->vm, pasid);
>>>>>>>>> + r = amdgpu_vm_init(adev, &fpriv->vm);
>>>>>>>>> if (r)
>>>>>>>>> - goto error_pasid;
>>>>>>>>> + goto free_fpriv;
>>>>>>>>> fpriv->prt_va = amdgpu_vm_bo_add(adev, &fpriv->vm, NULL);
>>>>>>>>> if (!fpriv->prt_va) {
>>>>>>>>> @@ -1208,10 +1202,7 @@ int amdgpu_driver_open_kms(struct
>>>>>>>>> drm_device *dev, struct drm_file *file_priv)
>>>>>>>>> error_vm:
>>>>>>>>> amdgpu_vm_fini(adev, &fpriv->vm);
>>>>>>>>> -error_pasid:
>>>>>>>>> - if (pasid)
>>>>>>>>> - amdgpu_pasid_free(pasid);
>>>>>>>>> -
>>>>>>>>> +free_fpriv:
>>>>>>>>> kfree(fpriv);
>>>>>>>>> out_suspend:
>>>>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>>>>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>>>>>>>>> index 63975bda8e76..562c2c48a3a3 100644
>>>>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>>>>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>>>>>>>>> @@ -87,6 +87,69 @@ struct amdgpu_prt_cb {
>>>>>>>>> struct dma_fence_cb cb;
>>>>>>>>> };
>>>>>>>>> +static int amdgpu_vm_pasid_alloc(struct amdgpu_device *adev,
>>>>>>>>> + struct amdgpu_vm *vm, unsigned int pasid)
>>>>>>>>> +{
>>>>>>>>> + unsigned long flags;
>>>>>>>>> + int r;
>>>>>>>>> +
>>>>>>>>> + if (!pasid)
>>>>>>>>> + return 0;
>>>>>>>>> +
>>>>>>>>> + spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> + r = idr_alloc(&adev->vm_manager.pasid_idr, vm, pasid,
>>>>>>>>> pasid + 1,
>>>>>>>>> + GFP_ATOMIC);
>>>>>>>>> + spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> + if (r < 0)
>>>>>>>>> + return r;
>>>>>>>>> +
>>>>>>>>> + vm->pasid = pasid;
>>>>>>>>> + return 0;
>>>>>>>>> +}
>>>>>>>>> +static void amdgpu_vm_pasid_remove_id(struct amdgpu_device
>>>>>>>>> *adev,
>>>>>>>>> + unsigned int pasid)
>>>>>>>>> +{
>>>>>>>>> + unsigned long flags;
>>>>>>>>> +
>>>>>>>>> + if (!pasid)
>>>>>>>>> + return;
>>>>>>>>> +
>>>>>>>>> + spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> + idr_remove(&adev->vm_manager.pasid_idr, pasid);
>>>>>>>>> + spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> +
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>> +static void amdgpu_vm_pasid_remove(struct amdgpu_device *adev,
>>>>>>>>> + struct amdgpu_vm *vm)
>>>>>>>>> +{
>>>>>>>>> + amdgpu_vm_pasid_remove_id(adev, vm->pasid);
>>>>>>>>> + vm->pasid = 0;
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>> +static void amdgpu_vm_pasid_free(struct amdgpu_device *adev,
>>>>>>>>> + struct amdgpu_vm *vm)
>>>>>>>>> +{
>>>>>>>>> + if (!vm->pasid)
>>>>>>>>> + return;
>>>>>>>>> +
>>>>>>>>> + amdgpu_pasid_free(vm->pasid);
>>>>>>>>> + amdgpu_vm_pasid_remove(adev, vm);
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>> +static struct amdgpu_vm *amdgpu_vm_pasid_find(struct
>>>>>>>>> amdgpu_device *adev,
>>>>>>>>> + unsigned int pasid)
>>>>>>>>> +{
>>>>>>>>> + struct amdgpu_vm *vm;
>>>>>>>>> + unsigned long flags;
>>>>>>>>> +
>>>>>>>>> + spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> + vm = idr_find(&adev->vm_manager.pasid_idr, pasid);
>>>>>>>>> + spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> +
>>>>>>>>> + return vm;
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>> /*
>>>>>>>>> * vm eviction_lock can be taken in MMU notifiers. Make sure
>>>>>>>>> no reclaim-FS
>>>>>>>>> * happens while holding this lock anywhere to prevent
>>>>>>>>> deadlocks when
>>>>>>>>> @@ -2859,17 +2922,17 @@ long amdgpu_vm_wait_idle(struct
>>>>>>>>> amdgpu_vm *vm, long timeout)
>>>>>>>>> *
>>>>>>>>> * @adev: amdgpu_device pointer
>>>>>>>>> * @vm: requested vm
>>>>>>>>> - * @pasid: Process address space identifier
>>>>>>>>> *
>>>>>>>>> * Init @vm fields.
>>>>>>>>> *
>>>>>>>>> * Returns:
>>>>>>>>> * 0 for success, error for failure.
>>>>>>>>> */
>>>>>>>>> -int amdgpu_vm_init(struct amdgpu_device *adev, struct
>>>>>>>>> amdgpu_vm *vm, u32 pasid)
>>>>>>>>> +int amdgpu_vm_init(struct amdgpu_device *adev, struct
>>>>>>>>> amdgpu_vm *vm)
>>>>>>>>> {
>>>>>>>>> struct amdgpu_bo *root_bo;
>>>>>>>>> struct amdgpu_bo_vm *root;
>>>>>>>>> + unsigned int pasid;
>>>>>>>>> int r, i;
>>>>>>>>> vm->va = RB_ROOT_CACHED;
>>>>>>>>> @@ -2940,19 +3003,15 @@ int amdgpu_vm_init(struct
>>>>>>>>> amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid)
>>>>>>>>> amdgpu_bo_unreserve(vm->root.bo);
>>>>>>>>> - if (pasid) {
>>>>>>>>> - unsigned long flags;
>>>>>>>>> -
>>>>>>>>> - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> - r = idr_alloc(&adev->vm_manager.pasid_idr, vm, pasid,
>>>>>>>>> pasid + 1,
>>>>>>>>> - GFP_ATOMIC);
>>>>>>>>> - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> - if (r < 0)
>>>>>>>>> - goto error_free_root;
>>>>>>>>> -
>>>>>>>>> - vm->pasid = pasid;
>>>>>>>>> + pasid = amdgpu_pasid_alloc(16);
>>>>>>>>> + if (pasid < 0) {
>>>>>>>>> + dev_warn(adev->dev, "No more PASIDs available!");
>>>>>>>>> + pasid = 0;
>>>>>>>>> }
>>>>>>>>> + if (amdgpu_vm_pasid_alloc(adev, vm, pasid))
>>>>>>>>> + goto error_free_pasid;
>>>>>>>>> +
>>>>>>>>> INIT_KFIFO(vm->faults);
>>>>>>>>> return 0;
>>>>>>>>> @@ -2960,6 +3019,10 @@ int amdgpu_vm_init(struct amdgpu_device
>>>>>>>>> *adev, struct amdgpu_vm *vm, u32 pasid)
>>>>>>>>> error_unreserve:
>>>>>>>>> amdgpu_bo_unreserve(vm->root.bo);
>>>>>>>>> +error_free_pasid:
>>>>>>>>> + if (pasid)
>>>>>>>>> + amdgpu_pasid_free(pasid);
>>>>>>>>> +
>>>>>>>>> error_free_root:
>>>>>>>>> amdgpu_bo_unref(&root->shadow);
>>>>>>>>> amdgpu_bo_unref(&root_bo);
>>>>>>>>> @@ -3039,18 +3102,11 @@ int amdgpu_vm_make_compute(struct
>>>>>>>>> amdgpu_device *adev, struct amdgpu_vm *vm,
>>>>>>>>> if (r)
>>>>>>>>> goto unreserve_bo;
>>>>>>>>> - if (pasid) {
>>>>>>>>> - unsigned long flags;
>>>>>>>>> -
>>>>>>>>> - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> - r = idr_alloc(&adev->vm_manager.pasid_idr, vm, pasid,
>>>>>>>>> pasid + 1,
>>>>>>>>> - GFP_ATOMIC);
>>>>>>>>> - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> + r = amdgpu_vm_pasid_alloc(adev, vm, pasid);
>>>>>>>>> + if (r == -ENOSPC)
>>>>>>>>> + goto unreserve_bo;
>>>>>>>>> - if (r == -ENOSPC)
>>>>>>>>> - goto unreserve_bo;
>>>>>>>>> - r = 0;
>>>>>>>>> - }
>>>>>>>>> + r = 0;
>>>>>>>>> /* Check if PD needs to be reinitialized and do it before
>>>>>>>>> * changing any other state, in case it fails.
>>>>>>>>> @@ -3088,19 +3144,7 @@ int amdgpu_vm_make_compute(struct
>>>>>>>>> amdgpu_device *adev, struct amdgpu_vm *vm,
>>>>>>>>> vm->last_update = NULL;
>>>>>>>>> vm->is_compute_context = true;
>>>>>>>>> - if (vm->pasid) {
>>>>>>>>> - unsigned long flags;
>>>>>>>>> -
>>>>>>>>> - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> - idr_remove(&adev->vm_manager.pasid_idr, vm->pasid);
>>>>>>>>> - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> -
>>>>>>>>> - /* Free the original amdgpu allocated pasid
>>>>>>>>> - * Will be replaced with kfd allocated pasid
>>>>>>>>> - */
>>>>>>>>> - amdgpu_pasid_free(vm->pasid);
>>>>>>>>> - vm->pasid = 0;
>>>>>>>>> - }
>>>>>>>>> + amdgpu_vm_pasid_free(adev, vm);
>>>>>>>>> /* Free the shadow bo for compute VM */
>>>>>>>>> amdgpu_bo_unref(&to_amdgpu_bo_vm(vm->root.bo)->shadow);
>>>>>>>>> @@ -3111,13 +3155,8 @@ int amdgpu_vm_make_compute(struct
>>>>>>>>> amdgpu_device *adev, struct amdgpu_vm *vm,
>>>>>>>>> goto unreserve_bo;
>>>>>>>>> free_idr:
>>>>>>>>> - if (pasid) {
>>>>>>>>> - unsigned long flags;
>>>>>>>>> + amdgpu_vm_pasid_remove_id(adev, pasid);
>>>>>>>>> - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> - idr_remove(&adev->vm_manager.pasid_idr, pasid);
>>>>>>>>> - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> - }
>>>>>>>>> unreserve_bo:
>>>>>>>>> amdgpu_bo_unreserve(vm->root.bo);
>>>>>>>>> return r;
>>>>>>>>> @@ -3133,14 +3172,7 @@ int amdgpu_vm_make_compute(struct
>>>>>>>>> amdgpu_device *adev, struct amdgpu_vm *vm,
>>>>>>>>> */
>>>>>>>>> void amdgpu_vm_release_compute(struct amdgpu_device *adev,
>>>>>>>>> struct amdgpu_vm *vm)
>>>>>>>>> {
>>>>>>>>> - if (vm->pasid) {
>>>>>>>>> - unsigned long flags;
>>>>>>>>> -
>>>>>>>>> - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> - idr_remove(&adev->vm_manager.pasid_idr, vm->pasid);
>>>>>>>>> - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> - }
>>>>>>>>> - vm->pasid = 0;
>>>>>>>>> + amdgpu_vm_pasid_remove(adev, vm);
>>>>>>>>> vm->is_compute_context = false;
>>>>>>>>> }
>>>>>>>>> @@ -3164,15 +3196,7 @@ void amdgpu_vm_fini(struct
>>>>>>>>> amdgpu_device *adev, struct amdgpu_vm *vm)
>>>>>>>>> root = amdgpu_bo_ref(vm->root.bo);
>>>>>>>>> amdgpu_bo_reserve(root, true);
>>>>>>>>> - if (vm->pasid) {
>>>>>>>>> - unsigned long flags;
>>>>>>>>> -
>>>>>>>>> - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> - idr_remove(&adev->vm_manager.pasid_idr, vm->pasid);
>>>>>>>>> - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> - vm->pasid = 0;
>>>>>>>>> - }
>>>>>>>>> -
>>>>>>>>> + amdgpu_vm_pasid_remove(adev, vm);
>>>>>>>>> dma_fence_wait(vm->last_unlocked, false);
>>>>>>>>> dma_fence_put(vm->last_unlocked);
>>>>>>>>> @@ -3334,16 +3358,10 @@ int amdgpu_vm_ioctl(struct
>>>>>>>>> drm_device *dev, void *data, struct drm_file *filp)
>>>>>>>>> void amdgpu_vm_get_task_info(struct amdgpu_device *adev, u32
>>>>>>>>> pasid,
>>>>>>>>> struct amdgpu_task_info *task_info)
>>>>>>>>> {
>>>>>>>>> - struct amdgpu_vm *vm;
>>>>>>>>> - unsigned long flags;
>>>>>>>>> + struct amdgpu_vm *vm = amdgpu_vm_pasid_find(adev, pasid);
>>>>>>>>> - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> -
>>>>>>>>> - vm = idr_find(&adev->vm_manager.pasid_idr, pasid);
>>>>>>>>> if (vm)
>>>>>>>>> *task_info = vm->task_info;
>>>>>>>>> -
>>>>>>>>> - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
>>>>>>>>> }
>>>>>>>>> /**
>>>>>>>>> @@ -3380,24 +3398,16 @@ bool amdgpu_vm_handle_fault(struct
>>>>>>>>> amdgpu_device *adev, u32 pasid,
>>>>>>>>> {
>>>>>>>>> bool is_compute_context = false;
>>>>>>>>> struct amdgpu_bo *root;
>>>>>>>>> - unsigned long irqflags;
>>>>>>>>> uint64_t value, flags;
>>>>>>>>> struct amdgpu_vm *vm;
>>>>>>>>> int r;
>>>>>>>>> - spin_lock_irqsave(&adev->vm_manager.pasid_lock, irqflags);
>>>>>>>>> - vm = idr_find(&adev->vm_manager.pasid_idr, pasid);
>>>>>>>>> - if (vm) {
>>>>>>>>> - root = amdgpu_bo_ref(vm->root.bo);
>>>>>>>>> - is_compute_context = vm->is_compute_context;
>>>>>>>>> - } else {
>>>>>>>>> - root = NULL;
>>>>>>>>> - }
>>>>>>>>> - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, irqflags);
>>>>>>>>> -
>>>>>>>>> - if (!root)
>>>>>>>>> + vm = amdgpu_vm_pasid_find(adev, pasid);
>>>>>>>>> + if (!vm)
>>>>>>>>> return false;
>>>>>>>>> + root = amdgpu_bo_ref(vm->root.bo);
>>>>>>>>> + is_compute_context = vm->is_compute_context;
>>>>>>>>> addr /= AMDGPU_GPU_PAGE_SIZE;
>>>>>>>>> if (is_compute_context &&
>>>>>>>>> @@ -3411,12 +3421,8 @@ bool amdgpu_vm_handle_fault(struct
>>>>>>>>> amdgpu_device *adev, u32 pasid,
>>>>>>>>> goto error_unref;
>>>>>>>>> /* Double check that the VM still exists */
>>>>>>>>> - spin_lock_irqsave(&adev->vm_manager.pasid_lock, irqflags);
>>>>>>>>> - vm = idr_find(&adev->vm_manager.pasid_idr, pasid);
>>>>>>>>> - if (vm && vm->root.bo != root)
>>>>>>>>> - vm = NULL;
>>>>>>>>> - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, irqflags);
>>>>>>>>> - if (!vm)
>>>>>>>>> + vm = amdgpu_vm_pasid_find(adev, pasid);
>>>>>>>>> + if (!vm || (vm && vm->root.bo != root))
>>>>>>>>> goto error_unlock;
>>>>>>>>> flags = AMDGPU_PTE_VALID | AMDGPU_PTE_SNOOPED |
>>>>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
>>>>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
>>>>>>>>> index ddb85a85cbba..ee994e21dffa 100644
>>>>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
>>>>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
>>>>>>>>> @@ -376,7 +376,7 @@ void amdgpu_vm_manager_init(struct
>>>>>>>>> amdgpu_device *adev);
>>>>>>>>> void amdgpu_vm_manager_fini(struct amdgpu_device *adev);
>>>>>>>>> long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout);
>>>>>>>>> -int amdgpu_vm_init(struct amdgpu_device *adev, struct
>>>>>>>>> amdgpu_vm *vm, u32 pasid);
>>>>>>>>> +int amdgpu_vm_init(struct amdgpu_device *adev, struct
>>>>>>>>> amdgpu_vm *vm);
>>>>>>>>> int amdgpu_vm_make_compute(struct amdgpu_device *adev,
>>>>>>>>> struct amdgpu_vm *vm, u32 pasid);
>>>>>>>>> void amdgpu_vm_release_compute(struct amdgpu_device *adev,
>>>>>>>>> struct amdgpu_vm *vm);
>>>>>>>>> void amdgpu_vm_fini(struct amdgpu_device *adev, struct
>>>>>>>>> amdgpu_vm *vm);
>>>>>>>
>>>>>
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>
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