[PATCH] drm/amdgpu: disable RAS bad page feature for specific APU

[Zhang, Hawking]

[AMD Official Use Only - AMD Internal Distribution Only]

connected_to_gpu is legacy design - I understand UMC IP version is also used so it works. Checking is_app_apu flag is good enough at this stage.

It would be better to move the code change to amdgpu_ras_fs_init.

In addition, it's more accurate to say that bad_pae_thread is not applicable to specific app platform, or something like that. Bad bad page feature is supported on the APU, but just GPU driver is not involved.

Regards,
Hawking

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Tao Zhou
Sent: Monday, September 9, 2024 19:05
To: amd-gfx at lists.freedesktop.org
Cc: Zhou1, Tao <Tao.Zhou1 at amd.com>
Subject: [PATCH] drm/amdgpu: disable RAS bad page feature for specific APU

The feature is unsupported on specific APU.

Signed-off-by: Tao Zhou <tao.zhou1 at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index dbfc41ddc3c7..d46f216a33b1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -3679,6 +3679,12 @@ int amdgpu_ras_init(struct amdgpu_device *adev)

        amdgpu_ras_init_reserved_vram_size(adev);

+       /* bad page feature is unspported on specific APU */
+       if ((adev->gmc.xgmi.connected_to_cpu ||
+           adev->gmc.is_app_apu) &&
+           amdgpu_ip_version(adev, UMC_HWIP, 0) == IP_VERSION(12, 0, 0))
+               amdgpu_bad_page_threshold = 0;
+
        if (amdgpu_ras_fs_init(adev)) {
                r = -EINVAL;
                goto release_con;
--
2.34.1