[PATCH 1/2] drm/amdgpu: create a func to check vm size

[zhoucm1]

Reviewed-by: Chunming Zhou <david1.zhou at amd.com> for both.

On 2017年03月29日 16:08, Junwei Zhang wrote:
> Signed-off-by: Junwei Zhang <Jerry.Zhang at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 51 ++++++++++++++++++------------
>   1 file changed, 31 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 3500da3..1ad1113 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -1078,6 +1078,36 @@ static void amdgpu_get_block_size(struct amdgpu_device *adev)
>   	}
>   }
>   
> +static void amdgpu_check_vm_size(struct amdgpu_device *adev)
> +{
> +	if (!amdgpu_check_pot_argument(amdgpu_vm_size)) {
> +		dev_warn(adev->dev, "VM size (%d) must be a power of 2\n",
> +			 amdgpu_vm_size);
> +		goto def_value;
> +	}
> +
> +	if (amdgpu_vm_size < 1) {
> +		dev_warn(adev->dev, "VM size (%d) too small, min is 1GB\n",
> +			 amdgpu_vm_size);
> +		goto def_value;
> +	}
> +
> +	/*
> +	 * Max GPUVM size for Cayman, SI, CI VI are 40 bits.
> +	 */
> +	if (amdgpu_vm_size > 1024) {
> +		dev_warn(adev->dev, "VM size (%d) too large, max is 1TB\n",
> +			 amdgpu_vm_size);
> +		goto def_value;
> +	}
> +
> +	return;
> +
> +def_value:
> +	amdgpu_vm_size = 8;
> +	dev_info(adev->dev, "set default VM size %dGB\n", amdgpu_vm_size);
> +}
> +
>   /**
>    * amdgpu_check_arguments - validate module params
>    *
> @@ -1107,26 +1137,7 @@ static void amdgpu_check_arguments(struct amdgpu_device *adev)
>   		}
>   	}
>   
> -	if (!amdgpu_check_pot_argument(amdgpu_vm_size)) {
> -		dev_warn(adev->dev, "VM size (%d) must be a power of 2\n",
> -			 amdgpu_vm_size);
> -		amdgpu_vm_size = 8;
> -	}
> -
> -	if (amdgpu_vm_size < 1) {
> -		dev_warn(adev->dev, "VM size (%d) too small, min is 1GB\n",
> -			 amdgpu_vm_size);
> -		amdgpu_vm_size = 8;
> -	}
> -
> -	/*
> -	 * Max GPUVM size for Cayman, SI and CI are 40 bits.
> -	 */
> -	if (amdgpu_vm_size > 1024) {
> -		dev_warn(adev->dev, "VM size (%d) too large, max is 1TB\n",
> -			 amdgpu_vm_size);
> -		amdgpu_vm_size = 8;
> -	}
> +	amdgpu_check_vm_size(adev);
>   
>   	amdgpu_get_block_size(adev);
>