[PATCH 11/11] drm/amdgpu/sdma7: add support for disable_kq

[Khatri, Sunil]

Reviewed-by: Sunil Khatri <sunil.khatri at amd.com>

On 3/6/2025 2:17 AM, Alex Deucher wrote:
> When the parameter is set, disable user submissions
> to kernel queues.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c | 4 ++++
>   1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
> index 92a79296708ae..40d45f738c0a8 100644
> --- a/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
> @@ -1316,6 +1316,9 @@ static int sdma_v7_0_early_init(struct amdgpu_ip_block *ip_block)
>   	struct amdgpu_device *adev = ip_block->adev;
>   	int r;
>   
> +	if (amdgpu_disable_kq == 1)
> +		adev->sdma.no_user_submission = true;
> +
>   	r = amdgpu_sdma_init_microcode(adev, 0, true);
>   	if (r) {
>   		DRM_ERROR("Failed to init sdma firmware!\n");
> @@ -1351,6 +1354,7 @@ static int sdma_v7_0_sw_init(struct amdgpu_ip_block *ip_block)
>   		ring->ring_obj = NULL;
>   		ring->use_doorbell = true;
>   		ring->me = i;
> +		ring->no_user_submission = adev->sdma.no_user_submission;
>   
>   		DRM_DEBUG("SDMA %d use_doorbell being set to: [%s]\n", i,
>   				ring->use_doorbell?"true":"false");