[PATCH] drm/amdgpu: Skip virt_exchange_init on SDMA poison consumption

[Luo, Zhigang]

[AMD Official Use Only - General]

Reviewed-by: Zhigang Luo <zhigang.luo at amd.com>

-----Original Message-----
From: Skvortsov, Victor <Victor.Skvortsov at amd.com>
Sent: Tuesday, March 12, 2024 10:09 PM
To: Skvortsov, Victor <Victor.Skvortsov at amd.com>; Chai, Thomas <YiPeng.Chai at amd.com>; Zhang, Hawking <Hawking.Zhang at amd.com>; Luo, Zhigang <Zhigang.Luo at amd.com>; amd-gfx at lists.freedesktop.org
Cc: Skvortsov, Victor <Victor.Skvortsov at amd.com>
Subject: [PATCH] drm/amdgpu: Skip virt_exchange_init on SDMA poison consumption

From: Victor Skvortsov <Victor.Skvortsov at amd.com>

Host will initiate an FLR in SDMA poison consumption scenario.
Guest should wait for FLR message to re-init data exchange.

Signed-off-by: Victor Skvortsov <Victor.Skvortsov at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
index 77f5b55decf9..a1bad772d932 100644
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
@@ -444,7 +444,8 @@ static void xgpu_nv_ras_poison_handler(struct amdgpu_device *adev,
                amdgpu_virt_fini_data_exchange(adev);
                xgpu_nv_send_access_requests_with_param(adev,
                                        IDH_RAS_POISON, block, 0, 0);
-               amdgpu_virt_init_data_exchange(adev);
+               if (block != AMDGPU_RAS_BLOCK__SDMA)
+                       amdgpu_virt_init_data_exchange(adev);
        }
 }

--
2.25.1