On 09/03/2018 08:22 PM, Christian König wrote:
> Enable the old AGP aperture to avoid GART mappings.
>
> v2: don't enable it for SRIOV
>
> Signed-off-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c | 10 +++++-----
> drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 2 ++
> drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c | 10 +++++-----
> 3 files changed, 12 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c b/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c
> index 3403ded39d13..ffd0ec9586d1 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c
> @@ -65,16 +65,16 @@ static void gfxhub_v1_0_init_system_aperture_regs(struct amdgpu_device *adev)
> {
> uint64_t value;
>
> - /* Disable AGP. */
> + /* Program the AGP BAR */
> WREG32_SOC15(GC, 0, mmMC_VM_AGP_BASE, 0);
> - WREG32_SOC15(GC, 0, mmMC_VM_AGP_TOP, 0);
> - WREG32_SOC15(GC, 0, mmMC_VM_AGP_BOT, 0xFFFFFFFF);
> + WREG32_SOC15(GC, 0, mmMC_VM_AGP_BOT, adev->gmc.agp_start >> 24);
> + WREG32_SOC15(GC, 0, mmMC_VM_AGP_TOP, adev->gmc.agp_end >> 24);
>
> /* Program the system aperture low logical page number. */
> WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_LOW_ADDR,
> - adev->gmc.vram_start >> 18);
> + min(adev->gmc.vram_start, adev->gmc.agp_start) >> 18);
> WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
> - adev->gmc.vram_end >> 18);
> + max(adev->gmc.vram_end, adev->gmc.agp_end) >> 18);
>
> /* Set default page address. */
> value = adev->vram_scratch.gpu_addr - adev->gmc.vram_start
> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> index f467638eb49d..3529c55ab52d 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> @@ -772,6 +772,8 @@ static void gmc_v9_0_vram_gtt_location(struct amdgpu_device *adev,
> base = mmhub_v1_0_get_fb_location(adev);
> amdgpu_gmc_vram_location(adev, &adev->gmc, base);
> amdgpu_gmc_gart_location(adev, mc);
> + if (!amdgpu_sriov_vf(adev))
> + amdgpu_gmc_agp_location(adev, mc);
> /* base offset of vram pages */
> adev->vm_manager.vram_base_offset = gfxhub_v1_0_get_mc_fb_offset(adev);
> }
> diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
> index 5f6a9c85488f..73d7c075dd33 100644
> --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
> @@ -76,16 +76,16 @@ static void mmhub_v1_0_init_system_aperture_regs(struct amdgpu_device *adev)
> uint64_t value;
> uint32_t tmp;
>
> - /* Disable AGP. */
> + /* Program the AGP BAR */
> WREG32_SOC15(MMHUB, 0, mmMC_VM_AGP_BASE, 0);
> - WREG32_SOC15(MMHUB, 0, mmMC_VM_AGP_TOP, 0);
> - WREG32_SOC15(MMHUB, 0, mmMC_VM_AGP_BOT, 0x00FFFFFF);
> + WREG32_SOC15(MMHUB, 0, mmMC_VM_AGP_BOT, adev->gmc.agp_start >> 24);
> + WREG32_SOC15(MMHUB, 0, mmMC_VM_AGP_TOP, adev->gmc.agp_end >> 24);
>
> /* Program the system aperture low logical page number. */
> WREG32_SOC15(MMHUB, 0, mmMC_VM_SYSTEM_APERTURE_LOW_ADDR,
> - adev->gmc.vram_start >> 18);
> + min(adev->gmc.vram_start, adev->gmc.agp_start) >> 18);
> WREG32_SOC15(MMHUB, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
> - adev->gmc.vram_end >> 18);
> + max(adev->gmc.vram_end, adev->gmc.agp_end) >> 18);
>
> /* Set default page address. */
> value = adev->vram_scratch.gpu_addr - adev->gmc.vram_start +
>
