drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c

   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_ras.h"
  28 #include "soc15.h"
  29 #include "df/df_3_6_offset.h"
  30 #include "xgmi/xgmi_4_0_0_smn.h"
  31 #include "xgmi/xgmi_4_0_0_sh_mask.h"
  32 #include "wafl/wafl2_4_0_0_smn.h"
  33 #include "wafl/wafl2_4_0_0_sh_mask.h"
  34
  35 static DEFINE_MUTEX(xgmi_mutex);
  36
  37 #define AMDGPU_MAX_XGMI_DEVICE_PER_HIVE         4
  38
  39 static LIST_HEAD(xgmi_hive_list);
  40
  41 static const int xgmi_pcs_err_status_reg_vg20[] = {
  42         smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS,
  43         smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS + 0x100000,
  44 };
  45
  46 static const int wafl_pcs_err_status_reg_vg20[] = {
  47         smnPCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS,
  48         smnPCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS + 0x100000,
  49 };
  50
  51 static const int xgmi_pcs_err_status_reg_arct[] = {
  52         smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS,
  53         smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS + 0x100000,
  54         smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS + 0x500000,
  55         smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS + 0x600000,
  56         smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS + 0x700000,
  57         smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS + 0x800000,
  58 };
  59
  60 /* same as vg20*/
  61 static const int wafl_pcs_err_status_reg_arct[] = {
  62         smnPCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS,
  63         smnPCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS + 0x100000,
  64 };
  65
  66 static const struct amdgpu_pcs_ras_field xgmi_pcs_ras_fields[] = {
  67         {"XGMI PCS DataLossErr",
  68          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, DataLossErr)},
  69         {"XGMI PCS TrainingErr",
  70          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, TrainingErr)},
  71         {"XGMI PCS CRCErr",
  72          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, CRCErr)},
  73         {"XGMI PCS BERExceededErr",
  74          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, BERExceededErr)},
  75         {"XGMI PCS TxMetaDataErr",
  76          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, TxMetaDataErr)},
  77         {"XGMI PCS ReplayBufParityErr",
  78          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ReplayBufParityErr)},
  79         {"XGMI PCS DataParityErr",
  80          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, DataParityErr)},
  81         {"XGMI PCS ReplayFifoOverflowErr",
  82          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ReplayFifoOverflowErr)},
  83         {"XGMI PCS ReplayFifoUnderflowErr",
  84          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ReplayFifoUnderflowErr)},
  85         {"XGMI PCS ElasticFifoOverflowErr",
  86          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ElasticFifoOverflowErr)},
  87         {"XGMI PCS DeskewErr",
  88          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, DeskewErr)},
  89         {"XGMI PCS DataStartupLimitErr",
  90          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, DataStartupLimitErr)},
  91         {"XGMI PCS FCInitTimeoutErr",
  92          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, FCInitTimeoutErr)},
  93         {"XGMI PCS RecoveryTimeoutErr",
  94          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, RecoveryTimeoutErr)},
  95         {"XGMI PCS ReadySerialTimeoutErr",
  96          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ReadySerialTimeoutErr)},
  97         {"XGMI PCS ReadySerialAttemptErr",
  98          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ReadySerialAttemptErr)},
  99         {"XGMI PCS RecoveryAttemptErr",
 100          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, RecoveryAttemptErr)},
 101         {"XGMI PCS RecoveryRelockAttemptErr",
 102          SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, RecoveryRelockAttemptErr)},
 103 };
 104
 105 static const struct amdgpu_pcs_ras_field wafl_pcs_ras_fields[] = {
 106         {"WAFL PCS DataLossErr",
 107          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, DataLossErr)},
 108         {"WAFL PCS TrainingErr",
 109          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, TrainingErr)},
 110         {"WAFL PCS CRCErr",
 111          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, CRCErr)},
 112         {"WAFL PCS BERExceededErr",
 113          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, BERExceededErr)},
 114         {"WAFL PCS TxMetaDataErr",
 115          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, TxMetaDataErr)},
 116         {"WAFL PCS ReplayBufParityErr",
 117          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ReplayBufParityErr)},
 118         {"WAFL PCS DataParityErr",
 119          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, DataParityErr)},
 120         {"WAFL PCS ReplayFifoOverflowErr",
 121          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ReplayFifoOverflowErr)},
 122         {"WAFL PCS ReplayFifoUnderflowErr",
 123          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ReplayFifoUnderflowErr)},
 124         {"WAFL PCS ElasticFifoOverflowErr",
 125          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ElasticFifoOverflowErr)},
 126         {"WAFL PCS DeskewErr",
 127          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, DeskewErr)},
 128         {"WAFL PCS DataStartupLimitErr",
 129          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, DataStartupLimitErr)},
 130         {"WAFL PCS FCInitTimeoutErr",
 131          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, FCInitTimeoutErr)},
 132         {"WAFL PCS RecoveryTimeoutErr",
 133          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, RecoveryTimeoutErr)},
 134         {"WAFL PCS ReadySerialTimeoutErr",
 135          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ReadySerialTimeoutErr)},
 136         {"WAFL PCS ReadySerialAttemptErr",
 137          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ReadySerialAttemptErr)},
 138         {"WAFL PCS RecoveryAttemptErr",
 139          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, RecoveryAttemptErr)},
 140         {"WAFL PCS RecoveryRelockAttemptErr",
 141          SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, RecoveryRelockAttemptErr)},
 142 };
 143
 144 /**
 145  * DOC: AMDGPU XGMI Support
 146  *
 147  * XGMI is a high speed interconnect that joins multiple GPU cards
 148  * into a homogeneous memory space that is organized by a collective
 149  * hive ID and individual node IDs, both of which are 64-bit numbers.
 150  *
 151  * The file xgmi_device_id contains the unique per GPU device ID and
 152  * is stored in the /sys/class/drm/card${cardno}/device/ directory.
 153  *
 154  * Inside the device directory a sub-directory 'xgmi_hive_info' is
 155  * created which contains the hive ID and the list of nodes.
 156  *
 157  * The hive ID is stored in:
 158  *   /sys/class/drm/card${cardno}/device/xgmi_hive_info/xgmi_hive_id
 159  *
 160  * The node information is stored in numbered directories:
 161  *   /sys/class/drm/card${cardno}/device/xgmi_hive_info/node${nodeno}/xgmi_device_id
 162  *
 163  * Each device has their own xgmi_hive_info direction with a mirror
 164  * set of node sub-directories.
 165  *
 166  * The XGMI memory space is built by contiguously adding the power of
 167  * two padded VRAM space from each node to each other.
 168  *
 169  */
 170
 171 static struct attribute amdgpu_xgmi_hive_id = {
 172         .name = "xgmi_hive_id",
 173         .mode = S_IRUGO
 174 };
 175
 176 static struct attribute *amdgpu_xgmi_hive_attrs[] = {
 177         &amdgpu_xgmi_hive_id,
 178         NULL
 179 };
 180
 181 static ssize_t amdgpu_xgmi_show_attrs(struct kobject *kobj,
 182         struct attribute *attr, char *buf)
 183 {
 184         struct amdgpu_hive_info *hive = container_of(
 185                 kobj, struct amdgpu_hive_info, kobj);
 186
 187         if (attr == &amdgpu_xgmi_hive_id)
 188                 return snprintf(buf, PAGE_SIZE, "%llu\n", hive->hive_id);
 189
 190         return 0;
 191 }
 192
 193 static void amdgpu_xgmi_hive_release(struct kobject *kobj)
 194 {
 195         struct amdgpu_hive_info *hive = container_of(
 196                 kobj, struct amdgpu_hive_info, kobj);
 197
 198         mutex_destroy(&hive->hive_lock);
 199         kfree(hive);
 200 }
 201
 202 static const struct sysfs_ops amdgpu_xgmi_hive_ops = {
 203         .show = amdgpu_xgmi_show_attrs,
 204 };
 205
 206 struct kobj_type amdgpu_xgmi_hive_type = {
 207         .release = amdgpu_xgmi_hive_release,
 208         .sysfs_ops = &amdgpu_xgmi_hive_ops,
 209         .default_attrs = amdgpu_xgmi_hive_attrs,
 210 };
 211
 212 static ssize_t amdgpu_xgmi_show_device_id(struct device *dev,
 213                                      struct device_attribute *attr,
 214                                      char *buf)
 215 {
 216         struct drm_device *ddev = dev_get_drvdata(dev);
 217         struct amdgpu_device *adev = drm_to_adev(ddev);
 218
 219         return sysfs_emit(buf, "%llu\n", adev->gmc.xgmi.node_id);
 220
 221 }
 222
 223 #define AMDGPU_XGMI_SET_FICAA(o)        ((o) | 0x456801)
 224 static ssize_t amdgpu_xgmi_show_error(struct device *dev,
 225                                       struct device_attribute *attr,
 226                                       char *buf)
 227 {
 228         struct drm_device *ddev = dev_get_drvdata(dev);
 229         struct amdgpu_device *adev = drm_to_adev(ddev);
 230         uint32_t ficaa_pie_ctl_in, ficaa_pie_status_in;
 231         uint64_t fica_out;
 232         unsigned int error_count = 0;
 233
 234         ficaa_pie_ctl_in = AMDGPU_XGMI_SET_FICAA(0x200);
 235         ficaa_pie_status_in = AMDGPU_XGMI_SET_FICAA(0x208);
 236
 237         fica_out = adev->df.funcs->get_fica(adev, ficaa_pie_ctl_in);
 238         if (fica_out != 0x1f)
 239                 pr_err("xGMI error counters not enabled!\n");
 240
 241         fica_out = adev->df.funcs->get_fica(adev, ficaa_pie_status_in);
 242
 243         if ((fica_out & 0xffff) == 2)
 244                 error_count = ((fica_out >> 62) & 0x1) + (fica_out >> 63);
 245
 246         adev->df.funcs->set_fica(adev, ficaa_pie_status_in, 0, 0);
 247
 248         return sysfs_emit(buf, "%u\n", error_count);
 249 }
 250
 251
 252 static DEVICE_ATTR(xgmi_device_id, S_IRUGO, amdgpu_xgmi_show_device_id, NULL);
 253 static DEVICE_ATTR(xgmi_error, S_IRUGO, amdgpu_xgmi_show_error, NULL);
 254
 255 static int amdgpu_xgmi_sysfs_add_dev_info(struct amdgpu_device *adev,
 256                                          struct amdgpu_hive_info *hive)
 257 {
 258         int ret = 0;
 259         char node[10] = { 0 };
 260
 261         /* Create xgmi device id file */
 262         ret = device_create_file(adev->dev, &dev_attr_xgmi_device_id);
 263         if (ret) {
 264                 dev_err(adev->dev, "XGMI: Failed to create device file xgmi_device_id\n");
 265                 return ret;
 266         }
 267
 268         /* Create xgmi error file */
 269         ret = device_create_file(adev->dev, &dev_attr_xgmi_error);
 270         if (ret)
 271                 pr_err("failed to create xgmi_error\n");
 272
 273
 274         /* Create sysfs link to hive info folder on the first device */
 275         if (hive->kobj.parent != (&adev->dev->kobj)) {
 276                 ret = sysfs_create_link(&adev->dev->kobj, &hive->kobj,
 277                                         "xgmi_hive_info");
 278                 if (ret) {
 279                         dev_err(adev->dev, "XGMI: Failed to create link to hive info");
 280                         goto remove_file;
 281                 }
 282         }
 283
 284         sprintf(node, "node%d", atomic_read(&hive->number_devices));
 285         /* Create sysfs link form the hive folder to yourself */
 286         ret = sysfs_create_link(&hive->kobj, &adev->dev->kobj, node);
 287         if (ret) {
 288                 dev_err(adev->dev, "XGMI: Failed to create link from hive info");
 289                 goto remove_link;
 290         }
 291
 292         goto success;
 293
 294
 295 remove_link:
 296         sysfs_remove_link(&adev->dev->kobj, adev_to_drm(adev)->unique);
 297
 298 remove_file:
 299         device_remove_file(adev->dev, &dev_attr_xgmi_device_id);
 300
 301 success:
 302         return ret;
 303 }
 304
 305 static void amdgpu_xgmi_sysfs_rem_dev_info(struct amdgpu_device *adev,
 306                                           struct amdgpu_hive_info *hive)
 307 {
 308         char node[10];
 309         memset(node, 0, sizeof(node));
 310
 311         device_remove_file(adev->dev, &dev_attr_xgmi_device_id);
 312         device_remove_file(adev->dev, &dev_attr_xgmi_error);
 313
 314         if (hive->kobj.parent != (&adev->dev->kobj))
 315                 sysfs_remove_link(&adev->dev->kobj,"xgmi_hive_info");
 316
 317         sprintf(node, "node%d", atomic_read(&hive->number_devices));
 318         sysfs_remove_link(&hive->kobj, node);
 319
 320 }
 321
 322
 323
 324 struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev)
 325 {
 326         struct amdgpu_hive_info *hive = NULL;
 327         int ret;
 328
 329         if (!adev->gmc.xgmi.hive_id)
 330                 return NULL;
 331
 332         if (adev->hive) {
 333                 kobject_get(&adev->hive->kobj);
 334                 return adev->hive;
 335         }
 336
 337         mutex_lock(&xgmi_mutex);
 338
 339         list_for_each_entry(hive, &xgmi_hive_list, node)  {
 340                 if (hive->hive_id == adev->gmc.xgmi.hive_id)
 341                         goto pro_end;
 342         }
 343
 344         hive = kzalloc(sizeof(*hive), GFP_KERNEL);
 345         if (!hive) {
 346                 dev_err(adev->dev, "XGMI: allocation failed\n");
 347                 hive = NULL;
 348                 goto pro_end;
 349         }
 350
 351         /* initialize new hive if not exist */
 352         ret = kobject_init_and_add(&hive->kobj,
 353                         &amdgpu_xgmi_hive_type,
 354                         &adev->dev->kobj,
 355                         "%s", "xgmi_hive_info");
 356         if (ret) {
 357                 dev_err(adev->dev, "XGMI: failed initializing kobject for xgmi hive\n");
 358                 kfree(hive);
 359                 hive = NULL;
 360                 goto pro_end;
 361         }
 362
 363         hive->hive_id = adev->gmc.xgmi.hive_id;
 364         INIT_LIST_HEAD(&hive->device_list);
 365         INIT_LIST_HEAD(&hive->node);
 366         mutex_init(&hive->hive_lock);
 367         atomic_set(&hive->in_reset, 0);
 368         atomic_set(&hive->number_devices, 0);
 369         task_barrier_init(&hive->tb);
 370         hive->pstate = AMDGPU_XGMI_PSTATE_UNKNOWN;
 371         hive->hi_req_gpu = NULL;
 372         /*
 373          * hive pstate on boot is high in vega20 so we have to go to low
 374          * pstate on after boot.
 375          */
 376         hive->hi_req_count = AMDGPU_MAX_XGMI_DEVICE_PER_HIVE;
 377         list_add_tail(&hive->node, &xgmi_hive_list);
 378
 379 pro_end:
 380         if (hive)
 381                 kobject_get(&hive->kobj);
 382         mutex_unlock(&xgmi_mutex);
 383         return hive;
 384 }
 385
 386 void amdgpu_put_xgmi_hive(struct amdgpu_hive_info *hive)
 387 {
 388         if (hive)
 389                 kobject_put(&hive->kobj);
 390 }
 391
 392 int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate)
 393 {
 394         int ret = 0;
 395         struct amdgpu_hive_info *hive;
 396         struct amdgpu_device *request_adev;
 397         bool is_hi_req = pstate == AMDGPU_XGMI_PSTATE_MAX_VEGA20;
 398         bool init_low;
 399
 400         hive = amdgpu_get_xgmi_hive(adev);
 401         if (!hive)
 402                 return 0;
 403
 404         request_adev = hive->hi_req_gpu ? hive->hi_req_gpu : adev;
 405         init_low = hive->pstate == AMDGPU_XGMI_PSTATE_UNKNOWN;
 406         amdgpu_put_xgmi_hive(hive);
 407         /* fw bug so temporarily disable pstate switching */
 408         return 0;
 409
 410         if (!hive || adev->asic_type != CHIP_VEGA20)
 411                 return 0;
 412
 413         mutex_lock(&hive->hive_lock);
 414
 415         if (is_hi_req)
 416                 hive->hi_req_count++;
 417         else
 418                 hive->hi_req_count--;
 419
 420         /*
 421          * Vega20 only needs single peer to request pstate high for the hive to
 422          * go high but all peers must request pstate low for the hive to go low
 423          */
 424         if (hive->pstate == pstate ||
 425                         (!is_hi_req && hive->hi_req_count && !init_low))
 426                 goto out;
 427
 428         dev_dbg(request_adev->dev, "Set xgmi pstate %d.\n", pstate);
 429
 430         ret = amdgpu_dpm_set_xgmi_pstate(request_adev, pstate);
 431         if (ret) {
 432                 dev_err(request_adev->dev,
 433                         "XGMI: Set pstate failure on device %llx, hive %llx, ret %d",
 434                         request_adev->gmc.xgmi.node_id,
 435                         request_adev->gmc.xgmi.hive_id, ret);
 436                 goto out;
 437         }
 438
 439         if (init_low)
 440                 hive->pstate = hive->hi_req_count ?
 441                                         hive->pstate : AMDGPU_XGMI_PSTATE_MIN;
 442         else {
 443                 hive->pstate = pstate;
 444                 hive->hi_req_gpu = pstate != AMDGPU_XGMI_PSTATE_MIN ?
 445                                                         adev : NULL;
 446         }
 447 out:
 448         mutex_unlock(&hive->hive_lock);
 449         return ret;
 450 }
 451
 452 int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev)
 453 {
 454         int ret;
 455
 456         /* Each psp need to set the latest topology */
 457         ret = psp_xgmi_set_topology_info(&adev->psp,
 458                                          atomic_read(&hive->number_devices),
 459                                          &adev->psp.xgmi_context.top_info);
 460         if (ret)
 461                 dev_err(adev->dev,
 462                         "XGMI: Set topology failure on device %llx, hive %llx, ret %d",
 463                         adev->gmc.xgmi.node_id,
 464                         adev->gmc.xgmi.hive_id, ret);
 465
 466         return ret;
 467 }
 468
 469
 470 /*
 471  * NOTE psp_xgmi_node_info.num_hops layout is as follows:
 472  * num_hops[7:6] = link type (0 = xGMI2, 1 = xGMI3, 2/3 = reserved)
 473  * num_hops[5:3] = reserved
 474  * num_hops[2:0] = number of hops
 475  */
 476 int amdgpu_xgmi_get_hops_count(struct amdgpu_device *adev,
 477                 struct amdgpu_device *peer_adev)
 478 {
 479         struct psp_xgmi_topology_info *top = &adev->psp.xgmi_context.top_info;
 480         uint8_t num_hops_mask = 0x7;
 481         int i;
 482
 483         for (i = 0 ; i < top->num_nodes; ++i)
 484                 if (top->nodes[i].node_id == peer_adev->gmc.xgmi.node_id)
 485                         return top->nodes[i].num_hops & num_hops_mask;
 486         return  -EINVAL;
 487 }
 488
 489 int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
 490 {
 491         struct psp_xgmi_topology_info *top_info;
 492         struct amdgpu_hive_info *hive;
 493         struct amdgpu_xgmi      *entry;
 494         struct amdgpu_device *tmp_adev = NULL;
 495
 496         int count = 0, ret = 0;
 497
 498         if (!adev->gmc.xgmi.supported)
 499                 return 0;
 500
 501         if (!adev->gmc.xgmi.pending_reset &&
 502             amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_PSP)) {
 503                 ret = psp_xgmi_initialize(&adev->psp);
 504                 if (ret) {
 505                         dev_err(adev->dev,
 506                                 "XGMI: Failed to initialize xgmi session\n");
 507                         return ret;
 508                 }
 509
 510                 ret = psp_xgmi_get_hive_id(&adev->psp, &adev->gmc.xgmi.hive_id);
 511                 if (ret) {
 512                         dev_err(adev->dev,
 513                                 "XGMI: Failed to get hive id\n");
 514                         return ret;
 515                 }
 516
 517                 ret = psp_xgmi_get_node_id(&adev->psp, &adev->gmc.xgmi.node_id);
 518                 if (ret) {
 519                         dev_err(adev->dev,
 520                                 "XGMI: Failed to get node id\n");
 521                         return ret;
 522                 }
 523         } else {
 524                 adev->gmc.xgmi.hive_id = 16;
 525                 adev->gmc.xgmi.node_id = adev->gmc.xgmi.physical_node_id + 16;
 526         }
 527
 528         hive = amdgpu_get_xgmi_hive(adev);
 529         if (!hive) {
 530                 ret = -EINVAL;
 531                 dev_err(adev->dev,
 532                         "XGMI: node 0x%llx, can not match hive 0x%llx in the hive list.\n",
 533                         adev->gmc.xgmi.node_id, adev->gmc.xgmi.hive_id);
 534                 goto exit;
 535         }
 536         mutex_lock(&hive->hive_lock);
 537
 538         top_info = &adev->psp.xgmi_context.top_info;
 539
 540         list_add_tail(&adev->gmc.xgmi.head, &hive->device_list);
 541         list_for_each_entry(entry, &hive->device_list, head)
 542                 top_info->nodes[count++].node_id = entry->node_id;
 543         top_info->num_nodes = count;
 544         atomic_set(&hive->number_devices, count);
 545
 546         task_barrier_add_task(&hive->tb);
 547
 548         if (!adev->gmc.xgmi.pending_reset &&
 549             amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_PSP)) {
 550                 list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {
 551                         /* update node list for other device in the hive */
 552                         if (tmp_adev != adev) {
 553                                 top_info = &tmp_adev->psp.xgmi_context.top_info;
 554                                 top_info->nodes[count - 1].node_id =
 555                                         adev->gmc.xgmi.node_id;
 556                                 top_info->num_nodes = count;
 557                         }
 558                         ret = amdgpu_xgmi_update_topology(hive, tmp_adev);
 559                         if (ret)
 560                                 goto exit_unlock;
 561                 }
 562
 563                 /* get latest topology info for each device from psp */
 564                 list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {
 565                         ret = psp_xgmi_get_topology_info(&tmp_adev->psp, count,
 566                                         &tmp_adev->psp.xgmi_context.top_info);
 567                         if (ret) {
 568                                 dev_err(tmp_adev->dev,
 569                                         "XGMI: Get topology failure on device %llx, hive %llx, ret %d",
 570                                         tmp_adev->gmc.xgmi.node_id,
 571                                         tmp_adev->gmc.xgmi.hive_id, ret);
 572                                 /* To do : continue with some node failed or disable the whole hive */
 573                                 goto exit_unlock;
 574                         }
 575                 }
 576         }
 577
 578         if (!ret && !adev->gmc.xgmi.pending_reset)
 579                 ret = amdgpu_xgmi_sysfs_add_dev_info(adev, hive);
 580
 581 exit_unlock:
 582         mutex_unlock(&hive->hive_lock);
 583 exit:
 584         if (!ret) {
 585                 adev->hive = hive;
 586                 dev_info(adev->dev, "XGMI: Add node %d, hive 0x%llx.\n",
 587                          adev->gmc.xgmi.physical_node_id, adev->gmc.xgmi.hive_id);
 588         } else {
 589                 amdgpu_put_xgmi_hive(hive);
 590                 dev_err(adev->dev, "XGMI: Failed to add node %d, hive 0x%llx ret: %d\n",
 591                         adev->gmc.xgmi.physical_node_id, adev->gmc.xgmi.hive_id,
 592                         ret);
 593         }
 594
 595         return ret;
 596 }
 597
 598 int amdgpu_xgmi_remove_device(struct amdgpu_device *adev)
 599 {
 600         struct amdgpu_hive_info *hive = adev->hive;
 601
 602         if (!adev->gmc.xgmi.supported)
 603                 return -EINVAL;
 604
 605         if (!hive)
 606                 return -EINVAL;
 607
 608         mutex_lock(&hive->hive_lock);
 609         task_barrier_rem_task(&hive->tb);
 610         amdgpu_xgmi_sysfs_rem_dev_info(adev, hive);
 611         if (hive->hi_req_gpu == adev)
 612                 hive->hi_req_gpu = NULL;
 613         list_del(&adev->gmc.xgmi.head);
 614         mutex_unlock(&hive->hive_lock);
 615
 616         amdgpu_put_xgmi_hive(hive);
 617         adev->hive = NULL;
 618
 619         if (atomic_dec_return(&hive->number_devices) == 0) {
 620                 /* Remove the hive from global hive list */
 621                 mutex_lock(&xgmi_mutex);
 622                 list_del(&hive->node);
 623                 mutex_unlock(&xgmi_mutex);
 624
 625                 amdgpu_put_xgmi_hive(hive);
 626         }
 627
 628         return psp_xgmi_terminate(&adev->psp);
 629 }
 630
 631 static int amdgpu_xgmi_ras_late_init(struct amdgpu_device *adev)
 632 {
 633         int r;
 634         struct ras_ih_if ih_info = {
 635                 .cb = NULL,
 636         };
 637         struct ras_fs_if fs_info = {
 638                 .sysfs_name = "xgmi_wafl_err_count",
 639         };
 640
 641         if (!adev->gmc.xgmi.supported ||
 642             adev->gmc.xgmi.num_physical_nodes == 0)
 643                 return 0;
 644
 645         adev->gmc.xgmi.ras_funcs->reset_ras_error_count(adev);
 646
 647         if (!adev->gmc.xgmi.ras_if) {
 648                 adev->gmc.xgmi.ras_if = kmalloc(sizeof(struct ras_common_if), GFP_KERNEL);
 649                 if (!adev->gmc.xgmi.ras_if)
 650                         return -ENOMEM;
 651                 adev->gmc.xgmi.ras_if->block = AMDGPU_RAS_BLOCK__XGMI_WAFL;
 652                 adev->gmc.xgmi.ras_if->type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE;
 653                 adev->gmc.xgmi.ras_if->sub_block_index = 0;
 654                 strcpy(adev->gmc.xgmi.ras_if->name, "xgmi_wafl");
 655         }
 656         ih_info.head = fs_info.head = *adev->gmc.xgmi.ras_if;
 657         r = amdgpu_ras_late_init(adev, adev->gmc.xgmi.ras_if,
 658                                  &fs_info, &ih_info);
 659         if (r || !amdgpu_ras_is_supported(adev, adev->gmc.xgmi.ras_if->block)) {
 660                 kfree(adev->gmc.xgmi.ras_if);
 661                 adev->gmc.xgmi.ras_if = NULL;
 662         }
 663
 664         return r;
 665 }
 666
 667 static void amdgpu_xgmi_ras_fini(struct amdgpu_device *adev)
 668 {
 669         if (amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__XGMI_WAFL) &&
 670                         adev->gmc.xgmi.ras_if) {
 671                 struct ras_common_if *ras_if = adev->gmc.xgmi.ras_if;
 672                 struct ras_ih_if ih_info = {
 673                         .cb = NULL,
 674                 };
 675
 676                 amdgpu_ras_late_fini(adev, ras_if, &ih_info);
 677                 kfree(ras_if);
 678         }
 679 }
 680
 681 uint64_t amdgpu_xgmi_get_relative_phy_addr(struct amdgpu_device *adev,
 682                                            uint64_t addr)
 683 {
 684         struct amdgpu_xgmi *xgmi = &adev->gmc.xgmi;
 685         return (addr + xgmi->physical_node_id * xgmi->node_segment_size);
 686 }
 687
 688 static void pcs_clear_status(struct amdgpu_device *adev, uint32_t pcs_status_reg)
 689 {
 690         WREG32_PCIE(pcs_status_reg, 0xFFFFFFFF);
 691         WREG32_PCIE(pcs_status_reg, 0);
 692 }
 693
 694 static void amdgpu_xgmi_reset_ras_error_count(struct amdgpu_device *adev)
 695 {
 696         uint32_t i;
 697
 698         switch (adev->asic_type) {
 699         case CHIP_ARCTURUS:
 700                 for (i = 0; i < ARRAY_SIZE(xgmi_pcs_err_status_reg_arct); i++)
 701                         pcs_clear_status(adev,
 702                                          xgmi_pcs_err_status_reg_arct[i]);
 703                 break;
 704         case CHIP_VEGA20:
 705                 for (i = 0; i < ARRAY_SIZE(xgmi_pcs_err_status_reg_vg20); i++)
 706                         pcs_clear_status(adev,
 707                                          xgmi_pcs_err_status_reg_vg20[i]);
 708                 break;
 709         default:
 710                 break;
 711         }
 712 }
 713
 714 static int amdgpu_xgmi_query_pcs_error_status(struct amdgpu_device *adev,
 715                                               uint32_t value,
 716                                               uint32_t *ue_count,
 717                                               uint32_t *ce_count,
 718                                               bool is_xgmi_pcs)
 719 {
 720         int i;
 721         int ue_cnt;
 722
 723         if (is_xgmi_pcs) {
 724                 /* query xgmi pcs error status,
 725                  * only ue is supported */
 726                 for (i = 0; i < ARRAY_SIZE(xgmi_pcs_ras_fields); i ++) {
 727                         ue_cnt = (value &
 728                                   xgmi_pcs_ras_fields[i].pcs_err_mask) >>
 729                                   xgmi_pcs_ras_fields[i].pcs_err_shift;
 730                         if (ue_cnt) {
 731                                 dev_info(adev->dev, "%s detected\n",
 732                                          xgmi_pcs_ras_fields[i].err_name);
 733                                 *ue_count += ue_cnt;
 734                         }
 735                 }
 736         } else {
 737                 /* query wafl pcs error status,
 738                  * only ue is supported */
 739                 for (i = 0; i < ARRAY_SIZE(wafl_pcs_ras_fields); i++) {
 740                         ue_cnt = (value &
 741                                   wafl_pcs_ras_fields[i].pcs_err_mask) >>
 742                                   wafl_pcs_ras_fields[i].pcs_err_shift;
 743                         if (ue_cnt) {
 744                                 dev_info(adev->dev, "%s detected\n",
 745                                          wafl_pcs_ras_fields[i].err_name);
 746                                 *ue_count += ue_cnt;
 747                         }
 748                 }
 749         }
 750
 751         return 0;
 752 }
 753
 754 static int amdgpu_xgmi_query_ras_error_count(struct amdgpu_device *adev,
 755                                              void *ras_error_status)
 756 {
 757         struct ras_err_data *err_data = (struct ras_err_data *)ras_error_status;
 758         int i;
 759         uint32_t data;
 760         uint32_t ue_cnt = 0, ce_cnt = 0;
 761
 762         if (!amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__XGMI_WAFL))
 763                 return -EINVAL;
 764
 765         err_data->ue_count = 0;
 766         err_data->ce_count = 0;
 767
 768         switch (adev->asic_type) {
 769         case CHIP_ARCTURUS:
 770                 /* check xgmi pcs error */
 771                 for (i = 0; i < ARRAY_SIZE(xgmi_pcs_err_status_reg_arct); i++) {
 772                         data = RREG32_PCIE(xgmi_pcs_err_status_reg_arct[i]);
 773                         if (data)
 774                                 amdgpu_xgmi_query_pcs_error_status(adev,
 775                                                 data, &ue_cnt, &ce_cnt, true);
 776                 }
 777                 /* check wafl pcs error */
 778                 for (i = 0; i < ARRAY_SIZE(wafl_pcs_err_status_reg_arct); i++) {
 779                         data = RREG32_PCIE(wafl_pcs_err_status_reg_arct[i]);
 780                         if (data)
 781                                 amdgpu_xgmi_query_pcs_error_status(adev,
 782                                                 data, &ue_cnt, &ce_cnt, false);
 783                 }
 784                 break;
 785         case CHIP_VEGA20:
 786         default:
 787                 /* check xgmi pcs error */
 788                 for (i = 0; i < ARRAY_SIZE(xgmi_pcs_err_status_reg_vg20); i++) {
 789                         data = RREG32_PCIE(xgmi_pcs_err_status_reg_vg20[i]);
 790                         if (data)
 791                                 amdgpu_xgmi_query_pcs_error_status(adev,
 792                                                 data, &ue_cnt, &ce_cnt, true);
 793                 }
 794                 /* check wafl pcs error */
 795                 for (i = 0; i < ARRAY_SIZE(wafl_pcs_err_status_reg_vg20); i++) {
 796                         data = RREG32_PCIE(wafl_pcs_err_status_reg_vg20[i]);
 797                         if (data)
 798                                 amdgpu_xgmi_query_pcs_error_status(adev,
 799                                                 data, &ue_cnt, &ce_cnt, false);
 800                 }
 801                 break;
 802         }
 803
 804         adev->gmc.xgmi.ras_funcs->reset_ras_error_count(adev);
 805
 806         err_data->ue_count += ue_cnt;
 807         err_data->ce_count += ce_cnt;
 808
 809         return 0;
 810 }
 811
 812 const struct amdgpu_xgmi_ras_funcs xgmi_ras_funcs = {
 813         .ras_late_init = amdgpu_xgmi_ras_late_init,
 814         .ras_fini = amdgpu_xgmi_ras_fini,
 815         .query_ras_error_count = amdgpu_xgmi_query_ras_error_count,
 816         .reset_ras_error_count = amdgpu_xgmi_reset_ras_error_count,
 817 };