1/* $NetBSD: amdgpu_gfxhub_v1_1.c,v 1.2 2021/12/18 23:44:58 riastradh Exp $ */ 2 3/* 4 * Copyright 2018 Advanced Micro Devices, Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 */ 25#include <sys/cdefs.h> 26__KERNEL_RCSID(0, "$NetBSD: amdgpu_gfxhub_v1_1.c,v 1.2 2021/12/18 23:44:58 riastradh Exp $"); 27 28#include "amdgpu.h" 29#include "gfxhub_v1_1.h" 30 31#include "gc/gc_9_2_1_offset.h" 32#include "gc/gc_9_2_1_sh_mask.h" 33 34#include "soc15_common.h" 35 36int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev) 37{ 38 u32 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL); 39 u32 max_region = 40 REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_MAX_REGION); 41 u32 max_num_physical_nodes = 0; 42 u32 max_physical_node_id = 0; 43 44 switch (adev->asic_type) { 45 case CHIP_VEGA20: 46 max_num_physical_nodes = 4; 47 max_physical_node_id = 3; 48 break; 49 case CHIP_ARCTURUS: 50 max_num_physical_nodes = 8; 51 max_physical_node_id = 7; 52 break; 53 default: 54 return -EINVAL; 55 } 56 57 /* PF_MAX_REGION=0 means xgmi is disabled */ 58 if (max_region) { 59 adev->gmc.xgmi.num_physical_nodes = max_region + 1; 60 if (adev->gmc.xgmi.num_physical_nodes > max_num_physical_nodes) 61 return -EINVAL; 62 63 adev->gmc.xgmi.physical_node_id = 64 REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_LFB_REGION); 65 if (adev->gmc.xgmi.physical_node_id > max_physical_node_id) 66 return -EINVAL; 67 adev->gmc.xgmi.node_segment_size = REG_GET_FIELD( 68 RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE), 69 MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24; 70 } 71 72 return 0; 73} 74