[PATCH 1/3] drm/amdgpu: Implement MES Suspend and Resume APIs for GFX11

[Joshi, Mukul]

[AMD Official Use Only - AMD Internal Distribution Only]

> -----Original Message-----
> From: Kasiviswanathan, Harish <Harish.Kasiviswanathan at amd.com>
> Sent: Wednesday, August 14, 2024 10:37 AM
> To: Joshi, Mukul <Mukul.Joshi at amd.com>; amd-gfx at lists.freedesktop.org
> Cc: Kuehling, Felix <Felix.Kuehling at amd.com>; Deucher, Alexander
> <Alexander.Deucher at amd.com>; Joshi, Mukul <Mukul.Joshi at amd.com>
> Subject: RE: [PATCH 1/3] drm/amdgpu: Implement MES Suspend and Resume
> APIs for GFX11
>
> [AMD Official Use Only - AMD Internal Distribution Only]
>
> Do we need some checks for FW version for backward compatibility? Apart
> from that a minor typo in the commit message. "Support 'f'or GFX12"
>
We usually do that in the callers of the function. Having said that, adding this implementation
requires me to update the code during suspend/resume, which I missed.
I will fix that and the typo in v2.

Thanks,
Mukul

> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Mukul
> Joshi
> Sent: Tuesday, August 13, 2024 2:57 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Kuehling, Felix <Felix.Kuehling at amd.com>; Deucher, Alexander
> <Alexander.Deucher at amd.com>; Joshi, Mukul <Mukul.Joshi at amd.com>
> Subject: [PATCH 1/3] drm/amdgpu: Implement MES Suspend and Resume
> APIs for GFX11
>
> Add implementation for MES Suspend and Resume APIs to unmap/map all
> queues for GFX11. Support or GFX12 will be added when the corresponding
> firmware support is in place.
>
> Signed-off-by: Mukul Joshi <mukul.joshi at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/mes_v11_0.c | 32
> ++++++++++++++++++++++++--
>  1 file changed, 30 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
> b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
> index c0340ee3dec0..a5c582674db9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
> @@ -421,13 +421,41 @@ static int mes_v11_0_unmap_legacy_queue(struct
> amdgpu_mes *mes,  static int mes_v11_0_suspend_gang(struct amdgpu_mes
> *mes,
>                                   struct mes_suspend_gang_input *input)  {
> -       return 0;
> +       union MESAPI__SUSPEND mes_suspend_gang_pkt;
> +
> +       memset(&mes_suspend_gang_pkt, 0, sizeof(mes_suspend_gang_pkt));
> +
> +       mes_suspend_gang_pkt.header.type = MES_API_TYPE_SCHEDULER;
> +       mes_suspend_gang_pkt.header.opcode = MES_SCH_API_SUSPEND;
> +       mes_suspend_gang_pkt.header.dwsize = API_FRAME_SIZE_IN_DWORDS;
> +
> +       mes_suspend_gang_pkt.suspend_all_gangs = input->suspend_all_gangs;
> +       mes_suspend_gang_pkt.gang_context_addr = input-
> >gang_context_addr;
> +       mes_suspend_gang_pkt.suspend_fence_addr = input-
> >suspend_fence_addr;
> +       mes_suspend_gang_pkt.suspend_fence_value =
> + input->suspend_fence_value;
> +
> +       return mes_v11_0_submit_pkt_and_poll_completion(mes,
> +                       &mes_suspend_gang_pkt, sizeof(mes_suspend_gang_pkt),
> +                       offsetof(union MESAPI__SUSPEND, api_status));
>  }
>
>  static int mes_v11_0_resume_gang(struct amdgpu_mes *mes,
>                                  struct mes_resume_gang_input *input)  {
> -       return 0;
> +       union MESAPI__RESUME mes_resume_gang_pkt;
> +
> +       memset(&mes_resume_gang_pkt, 0, sizeof(mes_resume_gang_pkt));
> +
> +       mes_resume_gang_pkt.header.type = MES_API_TYPE_SCHEDULER;
> +       mes_resume_gang_pkt.header.opcode = MES_SCH_API_RESUME;
> +       mes_resume_gang_pkt.header.dwsize = API_FRAME_SIZE_IN_DWORDS;
> +
> +       mes_resume_gang_pkt.resume_all_gangs = input->resume_all_gangs;
> +       mes_resume_gang_pkt.gang_context_addr =
> + input->gang_context_addr;
> +
> +       return mes_v11_0_submit_pkt_and_poll_completion(mes,
> +                       &mes_resume_gang_pkt, sizeof(mes_resume_gang_pkt),
> +                       offsetof(union MESAPI__RESUME, api_status));
>  }
>
>  static int mes_v11_0_query_sched_status(struct amdgpu_mes *mes)
> --
> 2.35.1
>