Commit c1026c6f authored by Yifan Zha's avatar Yifan Zha Committed by Alex Deucher
Browse files

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: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarYifan Zha <Yifan.Zha@amd.com>
Signed-off-by: default avatarHorace Chen <horace.chen@amd.com>
Reviewed-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 425fede6

drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c

+5 −5
Original line number Diff line number Diff line
@@ -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);