[PATCH v2] drm/amdgpu/mes: zero the sdma_hqd_mask of 2nd SDMA engine for SDMA 6.0.1

[Huang, Tim]

[AMD Official Use Only - General]

Reviewed-by: Tim Huang <Tim.Huang at amd.com>


Best Regards,
Tim Huang

-----Original Message-----
From: Zhang, Yifan <Yifan1.Zhang at amd.com>
Sent: Wednesday, August 31, 2022 8:56 AM
To: amd-gfx at lists.freedesktop.org
Cc: Huang, Tim <Tim.Huang at amd.com>; Deucher, Alexander <Alexander.Deucher at amd.com>; Du, Xiaojian <Xiaojian.Du at amd.com>; Xiao, Jack <Jack.Xiao at amd.com>; Zhang, Yifan <Yifan1.Zhang at amd.com>
Subject: [PATCH v2] drm/amdgpu/mes: zero the sdma_hqd_mask of 2nd SDMA engine for SDMA 6.0.1

there is only one SDMA engine in SDMA 6.0.1, the sdma_hqd_mask has to be zeroed for the 2nd engine, otherwise MES scheduler will consider 2nd engine exists and map/unmap SDMA queues to the non-existent engine.

Signed-off-by: Yifan Zhang <yifan1.zhang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
index fe82b8b19a4e..0c546245793b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
@@ -181,6 +181,9 @@ int amdgpu_mes_init(struct amdgpu_device *adev)
        for (i = 0; i < AMDGPU_MES_MAX_SDMA_PIPES; i++) {
                if (adev->ip_versions[SDMA0_HWIP][0] < IP_VERSION(6, 0, 0))
                        adev->mes.sdma_hqd_mask[i] = i ? 0 : 0x3fc;
+               /* zero sdma_hqd_mask for non-existent engine */
+               else if (adev->sdma.num_instances == 1)
+                       adev->mes.sdma_hqd_mask[i] = i ? 0 : 0xfc;
                else
                        adev->mes.sdma_hqd_mask[i] = 0xfc;
        }
--
2.37.1