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 */ 24 #include <linux/list.h> 25 #include "amdgpu.h" 26 #include "amdgpu_xgmi.h" 27 28 29 static DEFINE_MUTEX(xgmi_mutex); 30 31 #define AMDGPU_MAX_XGMI_HIVE 8 32 #define AMDGPU_MAX_XGMI_DEVICE_PER_HIVE 4 33 34 static struct amdgpu_hive_info xgmi_hives[AMDGPU_MAX_XGMI_HIVE]; 35 static unsigned hive_count = 0; 36 37 38 void *amdgpu_xgmi_hive_try_lock(struct amdgpu_hive_info *hive) 39 { 40 return &hive->device_list; 41 } 42 43 struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lock) 44 { 45 int i; 46 struct amdgpu_hive_info *tmp; 47 48 if (!adev->gmc.xgmi.hive_id) 49 return NULL; 50 51 mutex_lock(&xgmi_mutex); 52 53 for (i = 0 ; i < hive_count; ++i) { 54 tmp = &xgmi_hives[i]; 55 if (tmp->hive_id == adev->gmc.xgmi.hive_id) { 56 if (lock) 57 mutex_lock(&tmp->hive_lock); 58 mutex_unlock(&xgmi_mutex); 59 return tmp; 60 } 61 } 62 if (i >= AMDGPU_MAX_XGMI_HIVE) { 63 mutex_unlock(&xgmi_mutex); 64 return NULL; 65 } 66 67 /* initialize new hive if not exist */ 68 tmp = &xgmi_hives[hive_count++]; 69 tmp->hive_id = adev->gmc.xgmi.hive_id; 70 INIT_LIST_HEAD(&tmp->device_list); 71 mutex_init(&tmp->hive_lock); 72 mutex_init(&tmp->reset_lock); 73 if (lock) 74 mutex_lock(&tmp->hive_lock); 75 76 mutex_unlock(&xgmi_mutex); 77 78 return tmp; 79 } 80 81 int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev) 82 { 83 int ret = -EINVAL; 84 85 /* Each psp need to set the latest topology */ 86 ret = psp_xgmi_set_topology_info(&adev->psp, 87 hive->number_devices, 88 &hive->topology_info); 89 if (ret) 90 dev_err(adev->dev, 91 "XGMI: Set topology failure on device %llx, hive %llx, ret %d", 92 adev->gmc.xgmi.node_id, 93 adev->gmc.xgmi.hive_id, ret); 94 95 return ret; 96 } 97 98 int amdgpu_xgmi_add_device(struct amdgpu_device *adev) 99 { 100 struct psp_xgmi_topology_info *hive_topology; 101 struct amdgpu_hive_info *hive; 102 struct amdgpu_xgmi *entry; 103 struct amdgpu_device *tmp_adev = NULL; 104 105 int count = 0, ret = -EINVAL; 106 107 if (!adev->gmc.xgmi.supported) 108 return 0; 109 110 ret = psp_xgmi_get_node_id(&adev->psp, &adev->gmc.xgmi.node_id); 111 if (ret) { 112 dev_err(adev->dev, 113 "XGMI: Failed to get node id\n"); 114 return ret; 115 } 116 117 ret = psp_xgmi_get_hive_id(&adev->psp, &adev->gmc.xgmi.hive_id); 118 if (ret) { 119 dev_err(adev->dev, 120 "XGMI: Failed to get hive id\n"); 121 return ret; 122 } 123 124 hive = amdgpu_get_xgmi_hive(adev, 1); 125 if (!hive) { 126 ret = -EINVAL; 127 dev_err(adev->dev, 128 "XGMI: node 0x%llx, can not match hive 0x%llx in the hive list.\n", 129 adev->gmc.xgmi.node_id, adev->gmc.xgmi.hive_id); 130 goto exit; 131 } 132 133 hive_topology = &hive->topology_info; 134 135 list_add_tail(&adev->gmc.xgmi.head, &hive->device_list); 136 list_for_each_entry(entry, &hive->device_list, head) 137 hive_topology->nodes[count++].node_id = entry->node_id; 138 hive->number_devices = count; 139 140 /* Each psp need to get the latest topology */ 141 list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) { 142 ret = psp_xgmi_get_topology_info(&tmp_adev->psp, count, hive_topology); 143 if (ret) { 144 dev_err(tmp_adev->dev, 145 "XGMI: Get topology failure on device %llx, hive %llx, ret %d", 146 tmp_adev->gmc.xgmi.node_id, 147 tmp_adev->gmc.xgmi.hive_id, ret); 148 /* To do : continue with some node failed or disable the whole hive */ 149 break; 150 } 151 } 152 153 list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) { 154 ret = amdgpu_xgmi_update_topology(hive, tmp_adev); 155 if (ret) 156 break; 157 } 158 159 dev_info(adev->dev, "XGMI: Add node %d, hive 0x%llx.\n", 160 adev->gmc.xgmi.physical_node_id, adev->gmc.xgmi.hive_id); 161 162 mutex_unlock(&hive->hive_lock); 163 exit: 164 return ret; 165 } 166 167 void amdgpu_xgmi_remove_device(struct amdgpu_device *adev) 168 { 169 struct amdgpu_hive_info *hive; 170 171 if (!adev->gmc.xgmi.supported) 172 return; 173 174 hive = amdgpu_get_xgmi_hive(adev, 1); 175 if (!hive) 176 return; 177 178 if (!(hive->number_devices--)) { 179 mutex_destroy(&hive->hive_lock); 180 mutex_destroy(&hive->reset_lock); 181 } else { 182 mutex_unlock(&hive->hive_lock); 183 } 184 } 185