From 68d60de3f4d52050d1b3326594b88e0d3a6ebe36 Mon Sep 17 00:00:00 2001
From: Yifan Zha <Yifan.Zha@amd.com>
Date: Wed, 27 Jul 2022 13:43:50 +0800
Subject: drm/amdgpu: Skip the program of MMMC_VM_AGP_* in SRIOV on MMHUB
v3_0_0
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: c1026c6f319724dc88fc08d9d9d35bcbdf492b42
Patch-mainline: v6.1-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849
[Why]
VF should not program these registers, the value were defined in the host.
[How]
Skip writing them in SRIOV environment and program them on host side.
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
Signed-off-by: Horace Chen <horace.chen@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c
index bc11b2de37ae..a1d26c4d80b8 100644
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c
@@ -169,17 +169,17 @@ static void mmhub_v3_0_init_system_aperture_regs(struct amdgpu_device *adev)
uint64_t value;
uint32_t tmp;
- /* Disable AGP. */
- WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BASE, 0);
- WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_TOP, 0);
- WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BOT, 0x00FFFFFF);
-
if (!amdgpu_sriov_vf(adev)) {
/*
* the new L1 policy will block SRIOV guest from writing
* these regs, and they will be programed at host.
* so skip programing these regs.
*/
+ /* Disable AGP. */
+ WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BASE, 0);
+ WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_TOP, 0);
+ WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BOT, 0x00FFFFFF);
+
/* Program the system aperture low logical page number. */
WREG32_SOC15(MMHUB, 0, regMMMC_VM_SYSTEM_APERTURE_LOW_ADDR,
adev->gmc.vram_start >> 18);
--
2.38.1