[Public]
Reviewed-by: Prike Liang <[email protected]>
Regards,
Prike
> -----Original Message-----
> From: amd-gfx <[email protected]> On Behalf Of Alex
> Deucher
> Sent: Saturday, October 11, 2025 5:15 AM
> To: [email protected]
> Cc: Deucher, Alexander <[email protected]>
> Subject: [PATCH 6/7] drm/amdgpu: Update AMDGPU_INFO_UQ_FW_AREAS
> query for sdma
>
> Add a query for sdma queues. Userspace can use this to query the size of the
> CSA
> buffers for sdma user queues.
>
> Signed-off-by: Alex Deucher <[email protected]>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 26 +++++++++++++++++++++++++
> include/uapi/drm/amdgpu_drm.h | 8 ++++++++
> 2 files changed, 34 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> index f368bda40be41..51af7b893f482 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> @@ -409,6 +409,24 @@ static int amdgpu_userq_metadata_info_compute(struct
> amdgpu_device *adev,
> return ret;
> }
>
> +static int amdgpu_userq_metadata_info_sdma(struct amdgpu_device *adev,
> + struct drm_amdgpu_info *info,
> + struct
> drm_amdgpu_info_uq_metadata_sdma
> *meta) {
> + int ret = -EOPNOTSUPP;
> +
> + if (adev->sdma.get_csa_info) {
> + struct amdgpu_sdma_csa_info csa = {};
> +
> + adev->sdma.get_csa_info(adev, &csa);
> + meta->csa_size = csa.size;
> + meta->csa_alignment = csa.alignment;
> + ret = 0;
> + }
> +
> + return ret;
> +}
> +
> static int amdgpu_hw_ip_info(struct amdgpu_device *adev,
> struct drm_amdgpu_info *info,
> struct drm_amdgpu_info_hw_ip *result) @@ -1385,6
> +1403,14 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct
> drm_file *filp)
> if (ret)
> return ret;
>
> + ret = copy_to_user(out, &meta_info,
> + min((size_t)size,
> sizeof(meta_info))) ? -
> EFAULT : 0;
> + return 0;
> + case AMDGPU_HW_IP_DMA:
> + ret = amdgpu_userq_metadata_info_sdma(adev, info,
> &meta_info.sdma);
> + if (ret)
> + return ret;
> +
> ret = copy_to_user(out, &meta_info,
> min((size_t)size,
> sizeof(meta_info))) ? -
> EFAULT : 0;
> return 0;
> diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
> index
> 881e8cc986e2b..021ed8a49600e 100644
> --- a/include/uapi/drm/amdgpu_drm.h
> +++ b/include/uapi/drm/amdgpu_drm.h
> @@ -1645,10 +1645,18 @@ struct drm_amdgpu_info_uq_metadata_compute {
> __u32 eop_alignment;
> };
>
> +struct drm_amdgpu_info_uq_metadata_sdma {
> + /* context save area size for sdma6 */
> + __u32 csa_size;
> + /* context save area base virtual alignment for sdma6 */
> + __u32 csa_alignment;
> +};
> +
> struct drm_amdgpu_info_uq_metadata {
> union {
> struct drm_amdgpu_info_uq_metadata_gfx gfx;
> struct drm_amdgpu_info_uq_metadata_compute compute;
> + struct drm_amdgpu_info_uq_metadata_sdma sdma;
> };
> };
>
> --
> 2.51.0
