[PATCH] drm/amdgpu: Skip access gfx11 golden registers under SRIOV

[Chen, Horace]

[AMD Official Use Only - General]

Reviewed-By: Horace Chen <horace.chen at amd.com>

-----Original Message-----
From: Yin, ZhenGuo (Chris) <ZhenGuo.Yin at amd.com>
Sent: Monday, November 27, 2023 10:43 AM
To: Yin, ZhenGuo (Chris) <ZhenGuo.Yin at amd.com>; amd-gfx at lists.freedesktop.org; Zha, YiFan(Even) <Yifan.Zha at amd.com>; Chen, Horace <Horace.Chen at amd.com>
Subject: Re: [PATCH] drm/amdgpu: Skip access gfx11 golden registers under SRIOV

Add potential reviewers.

On 11/23/2023 4:57 PM, ZhenGuo Yin wrote:
> [Why]
> Golden registers are PF-only registers on gfx11.
> RLCG interface will return "out-of-range" under SRIOV VF.
>
> [How]
> Skip access gfx11 golden registers under SRIOV.
>
> Signed-off-by: ZhenGuo Yin <zhenguo.yin at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c | 3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
> index 8ed4a6fb147a..288e926e5cd4 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
> @@ -293,6 +293,9 @@ static void gfx_v11_0_set_kiq_pm4_funcs(struct amdgpu_device *adev)
>
>   static void gfx_v11_0_init_golden_registers(struct amdgpu_device *adev)
>   {
> +     if (amdgpu_sriov_vf(adev))
> +             return;
> +
>       switch (amdgpu_ip_version(adev, GC_HWIP, 0)) {
>       case IP_VERSION(11, 0, 1):
>       case IP_VERSION(11, 0, 4):