[PATCH Review 2/2] drm/amdgpu: correct ras enabled flag

[Zhang, Hawking]

[AMD Official Use Only - General]

Just check gmc.xmgi.num_physical_nodes == 0 should be good enough for the case that we only have single ALDEBRAN/ARCURUS available in system.

In such case, there is no need to expose xgmi_wafl ras node.

Regards,
Hawking

From: Stanley.Yang <Stanley.Yang at amd.com>
Date: Monday, April 10, 2023 at 19:48
To: amd-gfx at lists.freedesktop.org <amd-gfx at lists.freedesktop.org>, Zhang, Hawking <Hawking.Zhang at amd.com>, Zhou1, Tao <Tao.Zhou1 at amd.com>
Cc: Yang, Stanley <Stanley.Yang at amd.com>
Subject: [PATCH Review 2/2] drm/amdgpu: correct ras enabled flag
XGMI RAS should be according to the gmc xmgi supported flag
and xgmi physical nodes number.

Change-Id: Idf3600b30584b10b528e7237d103d84d5097b7e0
Signed-off-by: Stanley.Yang <Stanley.Yang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 4069bce9479f..d26a93272bf2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -2430,6 +2430,14 @@ static void amdgpu_ras_check_supported(struct amdgpu_device *adev)
                         else
                                 adev->ras_hw_enabled &= ~(1 << AMDGPU_RAS_BLOCK__VCN |
                                                         1 << AMDGPU_RAS_BLOCK__JPEG);
+
+                       /*
+                        * XGMI RAS is determined by xgmi supported flags
+                        * and xgmi num physical nodes
+                        */
+                       if (!adev->gmc.xgmi.supported ||
+                           adev->gmc.xmgi.num_physical_nodes == 0)
+                               adev->ras_hw_enabled &= ~(1 << AMDGPU_RAS_BLOCK__XGMI_WAFL);
                 } else {
                         dev_info(adev->dev, "SRAM ECC is not presented.\n");
                 }
--
2.17.1
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