[PATCH 6/6] drm/amdgpu: check if we need to reset at init time (v2)

[Quan, Evan]

Series is Reviewed-by: Evan Quan <evan.quan at amd.com>

> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Alex
> Deucher
> Sent: 2019年1月9日 6:12
> To: amd-gfx at lists.freedesktop.org
> Cc: Deucher, Alexander <Alexander.Deucher at amd.com>
> Subject: [PATCH 6/6] drm/amdgpu: check if we need to reset at init time (v2)
> 
> To deal with situations like kexec or GPU VM passthrough where the device
> may have been used previously without a proper GPU reset between.
> 
> v2: rebase
> 
> bug: https://bugs.freedesktop.org/show_bug.cgi?id=108585
> bug: https://bugs.freedesktop.org/show_bug.cgi?id=108754
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 1a558dc41ba6..8a61764e64cf 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -2550,6 +2550,17 @@ int amdgpu_device_init(struct amdgpu_device
> *adev,
>  	/* detect if we are with an SRIOV vbios */
>  	amdgpu_device_detect_sriov_bios(adev);
> 
> +	/* check if we need to reset the asic
> +	 *  E.g., driver was not cleanly unloaded previously, etc.
> +	 */
> +	if (amdgpu_asic_need_reset_on_init(adev)) {
> +		r = amdgpu_asic_reset(adev);
> +		if (r) {
> +			dev_err(adev->dev, "asic reset on init failed\n");
> +			goto failed;
> +		}
> +	}
> +
>  	/* Post card if necessary */
>  	if (amdgpu_device_need_post(adev)) {
>  		if (!adev->bios) {
> --
> 2.20.1
> 
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