1 /* 2 * Copyright 2018 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 */ 23 #include "amdgpu.h" 24 #include "gfxhub_v1_1.h" 25 26 #include "gc/gc_9_2_1_offset.h" 27 #include "gc/gc_9_2_1_sh_mask.h" 28 29 #include "soc15_common.h" 30 31 #define mmMC_VM_XGMI_LFB_CNTL_ALDE 0x0978 32 #define mmMC_VM_XGMI_LFB_CNTL_ALDE_BASE_IDX 0 33 #define mmMC_VM_XGMI_LFB_SIZE_ALDE 0x0979 34 #define mmMC_VM_XGMI_LFB_SIZE_ALDE_BASE_IDX 0 35 //MC_VM_XGMI_LFB_CNTL 36 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_LFB_REGION__SHIFT 0x0 37 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_MAX_REGION__SHIFT 0x4 38 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_LFB_REGION_MASK 0x0000000FL 39 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_MAX_REGION_MASK 0x000000F0L 40 //MC_VM_XGMI_LFB_SIZE 41 #define MC_VM_XGMI_LFB_SIZE_ALDE__PF_LFB_SIZE__SHIFT 0x0 42 #define MC_VM_XGMI_LFB_SIZE_ALDE__PF_LFB_SIZE_MASK 0x0001FFFFL 43 44 int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev) 45 { 46 u32 max_num_physical_nodes; 47 u32 max_physical_node_id; 48 u32 xgmi_lfb_cntl; 49 u32 max_region; 50 u64 seg_size; 51 52 if (adev->asic_type == CHIP_ALDEBARAN) { 53 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL_ALDE); 54 seg_size = REG_GET_FIELD( 55 RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE_ALDE), 56 MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24; 57 } else { 58 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL); 59 seg_size = REG_GET_FIELD( 60 RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE), 61 MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24; 62 } 63 64 max_region = 65 REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_MAX_REGION); 66 67 68 switch (adev->asic_type) { 69 case CHIP_VEGA20: 70 max_num_physical_nodes = 4; 71 max_physical_node_id = 3; 72 break; 73 case CHIP_ARCTURUS: 74 max_num_physical_nodes = 8; 75 max_physical_node_id = 7; 76 break; 77 case CHIP_ALDEBARAN: 78 /* just using duplicates for Aldebaran support, revisit later */ 79 max_num_physical_nodes = 8; 80 max_physical_node_id = 7; 81 break; 82 default: 83 return -EINVAL; 84 } 85 86 /* PF_MAX_REGION=0 means xgmi is disabled */ 87 if (max_region || adev->gmc.xgmi.connected_to_cpu) { 88 adev->gmc.xgmi.num_physical_nodes = max_region + 1; 89 90 if (adev->gmc.xgmi.num_physical_nodes > max_num_physical_nodes) 91 return -EINVAL; 92 93 adev->gmc.xgmi.physical_node_id = 94 REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, 95 PF_LFB_REGION); 96 97 if (adev->gmc.xgmi.physical_node_id > max_physical_node_id) 98 return -EINVAL; 99 100 adev->gmc.xgmi.node_segment_size = seg_size; 101 } 102 103 return 0; 104 } 105