[PATCH 6/7] drm/amdgpu/mes: add mes ring test

[Xiao, Jack]

[AMD Official Use Only - General]

will drop this single patch, and send out another independent patch for this.

Thanks,
Jack
________________________________
From: Yu, Lang <Lang.Yu at amd.com>
Sent: Wednesday, 29 June 2022 16:35
To: Xiao, Jack <Jack.Xiao at amd.com>
Cc: amd-gfx at lists.freedesktop.org <amd-gfx at lists.freedesktop.org>
Subject: Re: [PATCH 6/7] drm/amdgpu/mes: add mes ring test

On 06/29/ , Jack Xiao wrote:
> Use read/write register to test mes ring.
>
> Signed-off-by: Jack Xiao <Jack.Xiao at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c | 36 +++++++++++++++++++++++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h |  1 +
>  drivers/gpu/drm/amd/amdgpu/mes_v11_0.c  |  6 +++++
>  3 files changed, 43 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
> index b6c2a5058b64..c18ea0bc00eb 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
> @@ -926,6 +926,42 @@ int amdgpu_mes_reg_wait(struct amdgpu_device *adev, uint32_t reg,
>        return r;
>  }
>
> +int amdgpu_mes_ring_test_ring(struct amdgpu_device *adev)
> +{
> +     uint32_t scratch;
> +     uint32_t tmp = 0;
> +     unsigned i;
> +     int r = 0;
> +
> +     r = amdgpu_gfx_scratch_get(adev, &scratch);

amdgpu_gfx_scratch_get/free() have been removed in latest amd-staging-drm-next.
See e9b8129d8ca5 (drm/amdgpu: nuke dynamic gfx scratch reg allocation).

Regards,
Lang

> +     if (r) {
> +             DRM_ERROR("amdgpu: mes failed to get scratch reg (%d).\n", r);
> +             return r;
> +     }
> +
> +     WREG32(scratch, 0xCAFEDEAD);
> +
> +     tmp = amdgpu_mes_rreg(adev, scratch);
> +     if (tmp != 0xCAFEDEAD) {
> +             DRM_ERROR("mes failed to read register\n");
> +             goto error;
> +     }
> +
> +     r = amdgpu_mes_wreg(adev, scratch, 0xDEADBEEF);
> +     if (r)
> +             goto error;
> +
> +     tmp = RREG32(scratch);
> +     if (tmp != 0xDEADBEEF) {
> +             DRM_ERROR("mes failed to write register\n");
> +             r = -EIO;
> +     }
> +
> +error:
> +     amdgpu_gfx_scratch_free(adev, scratch);
> +     return r;
> +}
> +
>  static void
>  amdgpu_mes_ring_to_queue_props(struct amdgpu_device *adev,
>                               struct amdgpu_ring *ring,
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
> index 93b2ba817916..81610e3f3059 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
> @@ -341,6 +341,7 @@ int amdgpu_mes_reg_wait(struct amdgpu_device *adev, uint32_t reg,
>  int amdgpu_mes_reg_write_reg_wait(struct amdgpu_device *adev,
>                                  uint32_t reg0, uint32_t reg1,
>                                  uint32_t ref, uint32_t mask);
> +int amdgpu_mes_ring_test_ring(struct amdgpu_device *adev);
>
>  int amdgpu_mes_add_ring(struct amdgpu_device *adev, int gang_id,
>                        int queue_type, int idx,
> diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
> index 2a6c7a680c62..c4d085429d26 100644
> --- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
> @@ -1194,6 +1194,12 @@ static int mes_v11_0_hw_init(void *handle)
>                goto failure;
>        }
>
> +     r = amdgpu_mes_ring_test_ring(adev);
> +     if (r) {
> +             DRM_ERROR("MES ring test failed\n");
> +             goto failure;
> +     }
> +
>        /*
>         * Disable KIQ ring usage from the driver once MES is enabled.
>         * MES uses KIQ ring exclusively so driver cannot access KIQ ring
> --
> 2.35.1
>
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