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