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 #include "amdgpu_smu.h" 28 29 30 static DEFINE_MUTEX(xgmi_mutex); 31 32 #define AMDGPU_MAX_XGMI_HIVE 8 33 #define AMDGPU_MAX_XGMI_DEVICE_PER_HIVE 4 34 35 static struct amdgpu_hive_info xgmi_hives[AMDGPU_MAX_XGMI_HIVE]; 36 static unsigned hive_count = 0; 37 38 void *amdgpu_xgmi_hive_try_lock(struct amdgpu_hive_info *hive) 39 { 40 return &hive->device_list; 41 } 42 43 static ssize_t amdgpu_xgmi_show_hive_id(struct device *dev, 44 struct device_attribute *attr, char *buf) 45 { 46 struct amdgpu_hive_info *hive = 47 container_of(attr, struct amdgpu_hive_info, dev_attr); 48 49 return snprintf(buf, PAGE_SIZE, "%llu\n", hive->hive_id); 50 } 51 52 static int amdgpu_xgmi_sysfs_create(struct amdgpu_device *adev, 53 struct amdgpu_hive_info *hive) 54 { 55 int ret = 0; 56 57 if (WARN_ON(hive->kobj)) 58 return -EINVAL; 59 60 hive->kobj = kobject_create_and_add("xgmi_hive_info", &adev->dev->kobj); 61 if (!hive->kobj) { 62 dev_err(adev->dev, "XGMI: Failed to allocate sysfs entry!\n"); 63 return -EINVAL; 64 } 65 66 hive->dev_attr = (struct device_attribute) { 67 .attr = { 68 .name = "xgmi_hive_id", 69 .mode = S_IRUGO, 70 71 }, 72 .show = amdgpu_xgmi_show_hive_id, 73 }; 74 75 ret = sysfs_create_file(hive->kobj, &hive->dev_attr.attr); 76 if (ret) { 77 dev_err(adev->dev, "XGMI: Failed to create device file xgmi_hive_id\n"); 78 kobject_del(hive->kobj); 79 kobject_put(hive->kobj); 80 hive->kobj = NULL; 81 } 82 83 return ret; 84 } 85 86 static void amdgpu_xgmi_sysfs_destroy(struct amdgpu_device *adev, 87 struct amdgpu_hive_info *hive) 88 { 89 sysfs_remove_file(hive->kobj, &hive->dev_attr.attr); 90 kobject_del(hive->kobj); 91 kobject_put(hive->kobj); 92 hive->kobj = NULL; 93 } 94 95 static ssize_t amdgpu_xgmi_show_device_id(struct device *dev, 96 struct device_attribute *attr, 97 char *buf) 98 { 99 struct drm_device *ddev = dev_get_drvdata(dev); 100 struct amdgpu_device *adev = ddev->dev_private; 101 102 return snprintf(buf, PAGE_SIZE, "%llu\n", adev->gmc.xgmi.node_id); 103 104 } 105 106 107 static DEVICE_ATTR(xgmi_device_id, S_IRUGO, amdgpu_xgmi_show_device_id, NULL); 108 109 110 static int amdgpu_xgmi_sysfs_add_dev_info(struct amdgpu_device *adev, 111 struct amdgpu_hive_info *hive) 112 { 113 int ret = 0; 114 char node[10] = { 0 }; 115 116 /* Create xgmi device id file */ 117 ret = device_create_file(adev->dev, &dev_attr_xgmi_device_id); 118 if (ret) { 119 dev_err(adev->dev, "XGMI: Failed to create device file xgmi_device_id\n"); 120 return ret; 121 } 122 123 /* Create sysfs link to hive info folder on the first device */ 124 if (adev != hive->adev) { 125 ret = sysfs_create_link(&adev->dev->kobj, hive->kobj, 126 "xgmi_hive_info"); 127 if (ret) { 128 dev_err(adev->dev, "XGMI: Failed to create link to hive info"); 129 goto remove_file; 130 } 131 } 132 133 sprintf(node, "node%d", hive->number_devices); 134 /* Create sysfs link form the hive folder to yourself */ 135 ret = sysfs_create_link(hive->kobj, &adev->dev->kobj, node); 136 if (ret) { 137 dev_err(adev->dev, "XGMI: Failed to create link from hive info"); 138 goto remove_link; 139 } 140 141 goto success; 142 143 144 remove_link: 145 sysfs_remove_link(&adev->dev->kobj, adev->ddev->unique); 146 147 remove_file: 148 device_remove_file(adev->dev, &dev_attr_xgmi_device_id); 149 150 success: 151 return ret; 152 } 153 154 static void amdgpu_xgmi_sysfs_rem_dev_info(struct amdgpu_device *adev, 155 struct amdgpu_hive_info *hive) 156 { 157 device_remove_file(adev->dev, &dev_attr_xgmi_device_id); 158 sysfs_remove_link(&adev->dev->kobj, adev->ddev->unique); 159 sysfs_remove_link(hive->kobj, adev->ddev->unique); 160 } 161 162 163 164 struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lock) 165 { 166 int i; 167 struct amdgpu_hive_info *tmp; 168 169 if (!adev->gmc.xgmi.hive_id) 170 return NULL; 171 172 mutex_lock(&xgmi_mutex); 173 174 for (i = 0 ; i < hive_count; ++i) { 175 tmp = &xgmi_hives[i]; 176 if (tmp->hive_id == adev->gmc.xgmi.hive_id) { 177 if (lock) 178 mutex_lock(&tmp->hive_lock); 179 mutex_unlock(&xgmi_mutex); 180 return tmp; 181 } 182 } 183 if (i >= AMDGPU_MAX_XGMI_HIVE) { 184 mutex_unlock(&xgmi_mutex); 185 return NULL; 186 } 187 188 /* initialize new hive if not exist */ 189 tmp = &xgmi_hives[hive_count++]; 190 191 if (amdgpu_xgmi_sysfs_create(adev, tmp)) { 192 mutex_unlock(&xgmi_mutex); 193 return NULL; 194 } 195 196 tmp->adev = adev; 197 tmp->hive_id = adev->gmc.xgmi.hive_id; 198 INIT_LIST_HEAD(&tmp->device_list); 199 mutex_init(&tmp->hive_lock); 200 mutex_init(&tmp->reset_lock); 201 202 if (lock) 203 mutex_lock(&tmp->hive_lock); 204 tmp->pstate = -1; 205 mutex_unlock(&xgmi_mutex); 206 207 return tmp; 208 } 209 210 int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate) 211 { 212 int ret = 0; 213 struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev, 0); 214 215 if (!hive) 216 return 0; 217 218 if (hive->pstate == pstate) 219 return 0; 220 221 dev_dbg(adev->dev, "Set xgmi pstate %d.\n", pstate); 222 223 if (is_support_sw_smu(adev)) 224 ret = smu_set_xgmi_pstate(&adev->smu, pstate); 225 if (ret) 226 dev_err(adev->dev, 227 "XGMI: Set pstate failure on device %llx, hive %llx, ret %d", 228 adev->gmc.xgmi.node_id, 229 adev->gmc.xgmi.hive_id, ret); 230 231 return ret; 232 } 233 234 int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev) 235 { 236 int ret = -EINVAL; 237 238 /* Each psp need to set the latest topology */ 239 ret = psp_xgmi_set_topology_info(&adev->psp, 240 hive->number_devices, 241 &hive->topology_info); 242 if (ret) 243 dev_err(adev->dev, 244 "XGMI: Set topology failure on device %llx, hive %llx, ret %d", 245 adev->gmc.xgmi.node_id, 246 adev->gmc.xgmi.hive_id, ret); 247 248 return ret; 249 } 250 251 int amdgpu_xgmi_add_device(struct amdgpu_device *adev) 252 { 253 struct psp_xgmi_topology_info *hive_topology; 254 struct amdgpu_hive_info *hive; 255 struct amdgpu_xgmi *entry; 256 struct amdgpu_device *tmp_adev = NULL; 257 258 int count = 0, ret = -EINVAL; 259 260 if (!adev->gmc.xgmi.supported) 261 return 0; 262 263 ret = psp_xgmi_get_node_id(&adev->psp, &adev->gmc.xgmi.node_id); 264 if (ret) { 265 dev_err(adev->dev, 266 "XGMI: Failed to get node id\n"); 267 return ret; 268 } 269 270 ret = psp_xgmi_get_hive_id(&adev->psp, &adev->gmc.xgmi.hive_id); 271 if (ret) { 272 dev_err(adev->dev, 273 "XGMI: Failed to get hive id\n"); 274 return ret; 275 } 276 277 hive = amdgpu_get_xgmi_hive(adev, 1); 278 if (!hive) { 279 ret = -EINVAL; 280 dev_err(adev->dev, 281 "XGMI: node 0x%llx, can not match hive 0x%llx in the hive list.\n", 282 adev->gmc.xgmi.node_id, adev->gmc.xgmi.hive_id); 283 goto exit; 284 } 285 286 hive_topology = &hive->topology_info; 287 288 list_add_tail(&adev->gmc.xgmi.head, &hive->device_list); 289 list_for_each_entry(entry, &hive->device_list, head) 290 hive_topology->nodes[count++].node_id = entry->node_id; 291 hive->number_devices = count; 292 293 /* Each psp need to get the latest topology */ 294 list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) { 295 ret = psp_xgmi_get_topology_info(&tmp_adev->psp, count, hive_topology); 296 if (ret) { 297 dev_err(tmp_adev->dev, 298 "XGMI: Get topology failure on device %llx, hive %llx, ret %d", 299 tmp_adev->gmc.xgmi.node_id, 300 tmp_adev->gmc.xgmi.hive_id, ret); 301 /* To do : continue with some node failed or disable the whole hive */ 302 break; 303 } 304 } 305 306 list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) { 307 ret = amdgpu_xgmi_update_topology(hive, tmp_adev); 308 if (ret) 309 break; 310 } 311 312 if (!ret) 313 ret = amdgpu_xgmi_sysfs_add_dev_info(adev, hive); 314 315 if (!ret) 316 dev_info(adev->dev, "XGMI: Add node %d, hive 0x%llx.\n", 317 adev->gmc.xgmi.physical_node_id, adev->gmc.xgmi.hive_id); 318 else 319 dev_err(adev->dev, "XGMI: Failed to add node %d, hive 0x%llx ret: %d\n", 320 adev->gmc.xgmi.physical_node_id, adev->gmc.xgmi.hive_id, 321 ret); 322 323 324 mutex_unlock(&hive->hive_lock); 325 exit: 326 return ret; 327 } 328 329 void amdgpu_xgmi_remove_device(struct amdgpu_device *adev) 330 { 331 struct amdgpu_hive_info *hive; 332 333 if (!adev->gmc.xgmi.supported) 334 return; 335 336 hive = amdgpu_get_xgmi_hive(adev, 1); 337 if (!hive) 338 return; 339 340 if (!(hive->number_devices--)) { 341 amdgpu_xgmi_sysfs_destroy(adev, hive); 342 mutex_destroy(&hive->hive_lock); 343 mutex_destroy(&hive->reset_lock); 344 } else { 345 amdgpu_xgmi_sysfs_rem_dev_info(adev, hive); 346 mutex_unlock(&hive->hive_lock); 347 } 348 } 349