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drm/amdgpu: Skip the program of MMMC_VM_AGP_* in SRIOV on MMHUB v3_0_0 

[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>
This commit is contained in:
Yifan Zha 2022-07-27 13:43:50 +08:00 committed by Alex Deucher
parent 425fede6e8
commit c1026c6f31
1 changed files with 5 additions and 5 deletions
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10
drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c
View File

@ -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);