[PATCH] drm/amdgpu: Fix HDP flush for VFs on nbio v7.9

[Zhang, Hawking]

[AMD Official Use Only - General]

Reviewed-by: Hawking Zhang <Hawking.Zhang at amd.com>

Regards,
Hawking
-----Original Message-----
From: Lazar, Lijo <Lijo.Lazar at amd.com>
Sent: Wednesday, February 7, 2024 10:22
To: amd-gfx at lists.freedesktop.org
Cc: Zhang, Hawking <Hawking.Zhang at amd.com>; Deucher, Alexander <Alexander.Deucher at amd.com>; Ming, Davis <Davis.Ming at amd.com>; Kamal, Asad <Asad.Kamal at amd.com>; Ma, Le <Le.Ma at amd.com>
Subject: [PATCH] drm/amdgpu: Fix HDP flush for VFs on nbio v7.9

HDP flush remapping is not done for VFs. Keep the original offsets in VF environment.

Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c
index e90f33780803..b4723d68eab0 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c
@@ -431,6 +431,12 @@ static void nbio_v7_9_init_registers(struct amdgpu_device *adev)
        u32 inst_mask;
        int i;

+       if (amdgpu_sriov_vf(adev))
+               adev->rmmio_remap.reg_offset =
+                       SOC15_REG_OFFSET(
+                               NBIO, 0,
+                               regBIF_BX_DEV0_EPF0_VF0_HDP_MEM_COHERENCY_FLUSH_CNTL)
+                       << 2;
        WREG32_SOC15(NBIO, 0, regXCC_DOORBELL_FENCE,
                0xff & ~(adev->gfx.xcc_mask));

--
2.25.1