Re: [PATCH 1/1] drm/amdkfd: Cleanup vm process info if init vm failed

[Felix Kuehling <felix.kuehling@amd.com>]

On 2022-12-20 15:36, Philip Yang wrote:
> If acquire_vm failed when initializing KFD vm, set vm->process_info to
> NULL and free process info, otherwise, the future acquire_vm will
> always fail as vm->process_info is not NULL.
>
> Pass avm as parameter to remove the duplicate code.
>
> Signed-off-by: Philip Yang <Philip.Yang@amd.com>

Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>

I'm still curious what caused the acquire_vm failure in the first place.

Regards,
   Felix


> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h     |  4 ++--
>   .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c   | 18 ++----------------
>   drivers/gpu/drm/amd/amdkfd/kfd_process.c       | 12 ++++++++++--
>   3 files changed, 14 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> index 0040deaf8a83..fb41869e357a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> @@ -271,9 +271,9 @@ int amdgpu_amdkfd_get_pcie_bandwidth_mbytes(struct amdgpu_device *adev, bool is_
>   		((struct drm_file *)(drm_priv))->driver_priv)->vm)
>   
>   int amdgpu_amdkfd_gpuvm_set_vm_pasid(struct amdgpu_device *adev,
> -				     struct file *filp, u32 pasid);
> +				     struct amdgpu_vm *avm, u32 pasid);
>   int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
> -					struct file *filp,
> +					struct amdgpu_vm *avm,
>   					void **process_info,
>   					struct dma_fence **ef);
>   void amdgpu_amdkfd_gpuvm_release_process_vm(struct amdgpu_device *adev,
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> index b15091d8310d..2a118669d0e3 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> @@ -1430,18 +1430,11 @@ static void amdgpu_amdkfd_gpuvm_unpin_bo(struct amdgpu_bo *bo)
>   }
>   
>   int amdgpu_amdkfd_gpuvm_set_vm_pasid(struct amdgpu_device *adev,
> -				     struct file *filp, u32 pasid)
> +				     struct amdgpu_vm *avm, u32 pasid)
>   
>   {
> -	struct amdgpu_fpriv *drv_priv;
> -	struct amdgpu_vm *avm;
>   	int ret;
>   
> -	ret = amdgpu_file_to_fpriv(filp, &drv_priv);
> -	if (ret)
> -		return ret;
> -	avm = &drv_priv->vm;
> -
>   	/* Free the original amdgpu allocated pasid,
>   	 * will be replaced with kfd allocated pasid.
>   	 */
> @@ -1458,19 +1451,12 @@ int amdgpu_amdkfd_gpuvm_set_vm_pasid(struct amdgpu_device *adev,
>   }
>   
>   int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
> -					   struct file *filp,
> +					   struct amdgpu_vm *avm,
>   					   void **process_info,
>   					   struct dma_fence **ef)
>   {
> -	struct amdgpu_fpriv *drv_priv;
> -	struct amdgpu_vm *avm;
>   	int ret;
>   
> -	ret = amdgpu_file_to_fpriv(filp, &drv_priv);
> -	if (ret)
> -		return ret;
> -	avm = &drv_priv->vm;
> -
>   	/* Already a compute VM? */
>   	if (avm->process_info)
>   		return -EINVAL;
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
> index 51b1683ac5c1..71db24fefe05 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
> @@ -1563,6 +1563,8 @@ struct kfd_process_device *kfd_create_process_device_data(struct kfd_dev *dev,
>   int kfd_process_device_init_vm(struct kfd_process_device *pdd,
>   			       struct file *drm_file)
>   {
> +	struct amdgpu_fpriv *drv_priv;
> +	struct amdgpu_vm *avm;
>   	struct kfd_process *p;
>   	struct kfd_dev *dev;
>   	int ret;
> @@ -1573,10 +1575,15 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd,
>   	if (pdd->drm_priv)
>   		return -EBUSY;
>   
> +	ret = amdgpu_file_to_fpriv(drm_file, &drv_priv);
> +	if (ret)
> +		return ret;
> +	avm = &drv_priv->vm;
> +
>   	p = pdd->process;
>   	dev = pdd->dev;
>   
> -	ret = amdgpu_amdkfd_gpuvm_acquire_process_vm(dev->adev, drm_file,
> +	ret = amdgpu_amdkfd_gpuvm_acquire_process_vm(dev->adev, avm,
>   						     &p->kgd_process_info,
>   						     &p->ef);
>   	if (ret) {
> @@ -1593,7 +1600,7 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd,
>   	if (ret)
>   		goto err_init_cwsr;
>   
> -	ret = amdgpu_amdkfd_gpuvm_set_vm_pasid(dev->adev, drm_file, p->pasid);
> +	ret = amdgpu_amdkfd_gpuvm_set_vm_pasid(dev->adev, avm, p->pasid);
>   	if (ret)
>   		goto err_set_pasid;
>   
> @@ -1607,6 +1614,7 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd,
>   	kfd_process_device_destroy_ib_mem(pdd);
>   err_reserve_ib_mem:
>   	pdd->drm_priv = NULL;
> +	amdgpu_amdkfd_gpuvm_destroy_cb(dev->adev, avm);
>   
>   	return ret;
>   }