[PATCH 1/2] drm/amdgpu: add UAPI to query if user queues are supported

[Khatri, Sunil]

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

On 3/25/2025 2:03 AM, Alex Deucher wrote:
> Add an INFO query to check if user queues are supported.
>
> v2: switch to a mask of IPs (Marek)
> v3: move to drm_amdgpu_info_device (Marek)
>
> Cc:marek.olsak at amd.com
> Cc:prike.liang at amd.com
> Cc:sunil.khatri at amd.com
> Cc:yogesh.mohanmarimuthu at amd.com
> Signed-off-by: Alex Deucher<alexander.deucher at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 7 +++++++
>   include/uapi/drm/amdgpu_drm.h           | 3 +++
>   2 files changed, 10 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> index 3b7dfd56ccd0e..0ba3ef1e4a068 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> @@ -1009,6 +1009,13 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
>   			}
>   		}
>   
> +		if (adev->userq_funcs[AMDGPU_HW_IP_GFX])
> +			dev_info->userq_ip_mask |= (1 << AMDGPU_HW_IP_GFX);
> +		if (adev->userq_funcs[AMDGPU_HW_IP_COMPUTE])
> +			dev_info->userq_ip_mask |= (1 << AMDGPU_HW_IP_COMPUTE);
> +		if (adev->userq_funcs[AMDGPU_HW_IP_DMA])
> +			dev_info->userq_ip_mask |= (1 << AMDGPU_HW_IP_DMA);
> +
>   		ret = copy_to_user(out, dev_info,
>   				   min((size_t)size, sizeof(*dev_info))) ? -EFAULT : 0;
>   		kfree(dev_info);
> diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
> index 5dbd9037afe75..ef97c0d78b8a0 100644
> --- a/include/uapi/drm/amdgpu_drm.h
> +++ b/include/uapi/drm/amdgpu_drm.h
> @@ -1453,6 +1453,9 @@ struct drm_amdgpu_info_device {
>   	__u32 csa_size;
>   	/* context save area base virtual alignment for gfx11 */
>   	__u32 csa_alignment;
> +	/* Userq IP mask (1 << AMDGPU_HW_IP_*) */
> +	__u32 userq_ip_mask;
> +	__u32 pad;
>   };
>   
>   struct drm_amdgpu_info_hw_ip {
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