Re: [PATCH 13/17] drm/msm/adreno: Support AQE engine

[Rob Clark <rob.clark@oss.qualcomm.com>]

On Mon, Sep 29, 2025 at 10:51 PM Akhil P Oommen
<akhilpo@oss.qualcomm.com> wrote:
>
> AQE (Applicaton Qrisc Engine) is a dedicated core inside CP which aides
> in Raytracing related workloads. Add support for loading the AQE firmware
> and initialize the necessary registers.
>
> Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gpu.c   | 24 ++++++++++++++++++++++++
>  drivers/gpu/drm/msm/adreno/a6xx_gpu.h   |  2 ++
>  drivers/gpu/drm/msm/adreno/a8xx_gpu.c   |  3 +++
>  drivers/gpu/drm/msm/adreno/adreno_gpu.h |  1 +
>  4 files changed, 30 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index 4aeeaceb1fb30a9d68ac636c14249e3853ef73ac..07ac5be9d0bccf4d2345eb76b08851a94187e861 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -1093,6 +1093,30 @@ static int a6xx_ucode_load(struct msm_gpu *gpu)
>                 }
>         }
>
> +       if (!a6xx_gpu->aqe_bo && adreno_gpu->fw[ADRENO_FW_AQE]) {
> +               a6xx_gpu->aqe_bo = adreno_fw_create_bo(gpu,
> +                       adreno_gpu->fw[ADRENO_FW_AQE], &a6xx_gpu->aqe_iova);
> +
> +               if (IS_ERR(a6xx_gpu->aqe_bo)) {
> +                       int ret = PTR_ERR(a6xx_gpu->aqe_bo);
> +
> +                       a6xx_gpu->aqe_bo = NULL;
> +                       DRM_DEV_ERROR(&gpu->pdev->dev,
> +                               "Could not allocate AQE ucode: %d\n", ret);
> +
> +                       return ret;
> +               }
> +
> +               msm_gem_object_set_name(a6xx_gpu->aqe_bo, "aqefw");
> +               if (!a6xx_ucode_check_version(a6xx_gpu, a6xx_gpu->aqe_bo)) {

a6xx_ucode_check_version() doesn't do anything for aqe fw (but also
a6xx_ucode_check_version() should probably bail early for a8xx at this
point?)

OTOH if over time we keep growing the version checks, we might need to
re-think how a6xx_ucode_check_version() works.  But that is not a now
problem.

BR,
-R

> +                       msm_gem_unpin_iova(a6xx_gpu->aqe_bo, gpu->vm);
> +                       drm_gem_object_put(a6xx_gpu->aqe_bo);
> +
> +                       a6xx_gpu->aqe_bo = NULL;
> +                       return -EPERM;
> +               }
> +       }
> +
>         /*
>          * Expanded APRIV and targets that support WHERE_AM_I both need a
>          * privileged buffer to store the RPTR shadow
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h
> index 18300b12bf2a8bcd5601797df0fcc7afa8943863..a6ef8381abe5dd3eb202a645bb87a3bc352df047 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h
> @@ -58,6 +58,8 @@ struct a6xx_gpu {
>
>         struct drm_gem_object *sqe_bo;
>         uint64_t sqe_iova;
> +       struct drm_gem_object *aqe_bo;
> +       uint64_t aqe_iova;
>
>         struct msm_ringbuffer *cur_ring;
>         struct msm_ringbuffer *next_ring;
> diff --git a/drivers/gpu/drm/msm/adreno/a8xx_gpu.c b/drivers/gpu/drm/msm/adreno/a8xx_gpu.c
> index 6a64b1f96d730a46301545c52a83d62dddc6c2ff..9a09ce37687aba2f720637ec3845a25d72d2fff7 100644
> --- a/drivers/gpu/drm/msm/adreno/a8xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a8xx_gpu.c
> @@ -599,6 +599,9 @@ static int hw_init(struct msm_gpu *gpu)
>                 goto out;
>
>         gpu_write64(gpu, REG_A8XX_CP_SQE_INSTR_BASE, a6xx_gpu->sqe_iova);
> +       if (a6xx_gpu->aqe_iova)
> +               gpu_write64(gpu, REG_A8XX_CP_AQE_INSTR_BASE_0, a6xx_gpu->aqe_iova);
> +
>         /* Set the ringbuffer address */
>         gpu_write64(gpu, REG_A6XX_CP_RB_BASE, gpu->rb[0]->iova);
>         gpu_write(gpu, REG_A6XX_CP_RB_CNTL, MSM_GPU_RB_CNTL_DEFAULT);
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> index 6a2157f31122ba0c2f2a7005c98e3e4f1ada6acc..3de3a2cda7a1b9e6d4c32075afaadc6604e74b15 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> @@ -27,6 +27,7 @@ enum {
>         ADRENO_FW_PFP = 1,
>         ADRENO_FW_GMU = 1, /* a6xx */
>         ADRENO_FW_GPMU = 2,
> +       ADRENO_FW_AQE = 3,
>         ADRENO_FW_MAX,
>  };
>
>
> --
> 2.51.0
>