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

[Kasiviswanathan, Harish]

[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"

-----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