diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c index ff4a2e0a1ad6..1f8732beedd3 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c @@ -1146,6 +1146,16 @@ static int gmc_v9_0_early_init(void *handle) gmc_v9_0_set_mmhub_funcs(adev); gmc_v9_0_set_gfxhub_funcs(adev); + if (adev->asic_type == CHIP_VEGA20 || + adev->asic_type == CHIP_ARCTURUS) + adev->gmc.xgmi.supported = true; + + if (adev->asic_type == CHIP_ALDEBARAN) { + adev->gmc.xgmi.supported = true; + adev->gmc.xgmi.connected_to_cpu = + adev->smuio.funcs->is_host_gpu_xgmi_supported(adev); + } + adev->gmc.shared_aperture_start = 0x2000000000000000ULL; adev->gmc.shared_aperture_end = adev->gmc.shared_aperture_start + (4ULL << 30) - 1; @@ -1234,10 +1244,34 @@ static int gmc_v9_0_mc_init(struct amdgpu_device *adev) adev->gmc.aper_size = pci_resource_len(adev->pdev, 0); #ifdef CONFIG_X86_64 + /* + * AMD Accelerated Processing Platform (APP) supporting GPU-HOST xgmi + * interface can use VRAM through here as it appears system reserved + * memory in host address space. + * + * For APUs, VRAM is just the stolen system memory and can be accessed + * directly. + * + * Otherwise, use the legacy Host Data Path (HDP) through PCIe BAR. + */ + + /* check whether both host-gpu and gpu-gpu xgmi links exist */ + if (adev->gmc.xgmi.supported && adev->gmc.xgmi.connected_to_cpu && + adev->asic_type == CHIP_ALDEBARAN) { + + adev->gmc.aper_base = adev->gfxhub.funcs->get_mc_fb_offset(adev) + + adev->gmc.xgmi.node_id * + adev->gmc.xgmi.node_segment_size; + + adev->gmc.aper_size = adev->gmc.real_vram_size; + + } + if (adev->flags & AMD_IS_APU) { adev->gmc.aper_base = adev->gfxhub.funcs->get_mc_fb_offset(adev); adev->gmc.aper_size = adev->gmc.real_vram_size; } + #endif /* In case the PCI BAR is larger than the actual amount of vram */ adev->gmc.visible_vram_size = adev->gmc.aper_size; |