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

[Marek Olšák]

Adding it into drm_amdgpu_info_device with a DRM version bump is better.

Marek

On Fri, Mar 21, 2025 at 4:54 PM Alex Deucher <alexdeucher at gmail.com> wrote:

> I can move it into device_info if that's better.
>
> Alex
>
> On Fri, Mar 21, 2025 at 3:42 PM Marek Olšák <maraeo at gmail.com> wrote:
> >
> > This is not in device_info, but it'll do.
> >
> > Reviewed-by: Marek Olšák <marek.olsak at amd.com>
> >
> > Marek
> >
> > On Mon, Mar 17, 2025 at 5:38 PM Alex Deucher <alexander.deucher at amd.com>
> wrote:
> >>
> >> Add an INFO query to check if user queues are supported.
> >>
> >> v2: switch to a mask of IPs (Marek)
> >>
> >> Cc: marek.olsak at amd.com
> >> Cc: prike.liang at amd.com
> >> Cc: sunil.khatri at amd.com
> >> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> >> ---
> >>  drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 13 +++++++++++++
> >>  include/uapi/drm/amdgpu_drm.h           |  8 ++++++++
> >>  2 files changed, 21 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> >> index 3b7dfd56ccd0e..1d683c0487697 100644
> >> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> >> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> >> @@ -1340,6 +1340,19 @@ int amdgpu_info_ioctl(struct drm_device *dev,
> void *data, struct drm_file *filp)
> >>                         return -EINVAL;
> >>                 }
> >>         }
> >> +       case AMDGPU_INFO_UQ_SUPPORTED: {
> >> +               struct drm_amdgpu_info_uq_supported uq_supported = {};
> >> +
> >> +               if (adev->userq_funcs[AMDGPU_HW_IP_GFX])
> >> +                       uq_supported.supported |= (1 <<
> AMDGPU_HW_IP_GFX);
> >> +               if (adev->userq_funcs[AMDGPU_HW_IP_COMPUTE])
> >> +                       uq_supported.supported |= (1 <<
> AMDGPU_HW_IP_COMPUTE);
> >> +               if (adev->userq_funcs[AMDGPU_HW_IP_DMA])
> >> +                       uq_supported.supported |= (1 <<
> AMDGPU_HW_IP_DMA);
> >> +               ret = copy_to_user(out, &uq_supported,
> >> +                                  min((size_t)size,
> sizeof(uq_supported))) ? -EFAULT : 0;
> >> +               return 0;
> >> +       }
> >>         default:
> >>                 DRM_DEBUG_KMS("Invalid request %d\n", info->query);
> >>                 return -EINVAL;
> >> diff --git a/include/uapi/drm/amdgpu_drm.h
> b/include/uapi/drm/amdgpu_drm.h
> >> index 5dbd9037afe75..4b64e91002c05 100644
> >> --- a/include/uapi/drm/amdgpu_drm.h
> >> +++ b/include/uapi/drm/amdgpu_drm.h
> >> @@ -1195,6 +1195,8 @@ struct drm_amdgpu_cs_chunk_cp_gfx_shadow {
> >>  #define AMDGPU_INFO_GPUVM_FAULT                        0x23
> >>  /* query FW object size and alignment */
> >>  #define AMDGPU_INFO_UQ_FW_AREAS                        0x24
> >> +/* query if user queues are supported */
> >> +#define AMDGPU_INFO_UQ_SUPPORTED               0x25
> >>
> >>  #define AMDGPU_INFO_MMR_SE_INDEX_SHIFT 0
> >>  #define AMDGPU_INFO_MMR_SE_INDEX_MASK  0xff
> >> @@ -1572,6 +1574,12 @@ struct drm_amdgpu_info_uq_metadata {
> >>         };
> >>  };
> >>
> >> +struct drm_amdgpu_info_uq_supported {
> >> +       /** returns a mask for each IP type (1 << AMDGPU_HW_IP_*) */
> >> +       __u32   supported;
> >> +       __u32   pad;
> >> +};
> >> +
> >>  /*
> >>   * Supported GPU families
> >>   */
> >> --
> >> 2.48.1
> >>
>
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