drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /*
   3  * Copyright 2014-2022 Advanced Micro Devices, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21  * OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include <linux/slab.h>
  26 #include <linux/list.h>
  27 #include "kfd_device_queue_manager.h"
  28 #include "kfd_priv.h"
  29 #include "kfd_kernel_queue.h"
  30 #include "amdgpu_amdkfd.h"
  31
  32 static inline struct process_queue_node *get_queue_by_qid(
  33                         struct process_queue_manager *pqm, unsigned int qid)
  34 {
  35         struct process_queue_node *pqn;
  36
  37         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
  38                 if ((pqn->q && pqn->q->properties.queue_id == qid) ||
  39                     (pqn->kq && pqn->kq->queue->properties.queue_id == qid))
  40                         return pqn;
  41         }
  42
  43         return NULL;
  44 }
  45
  46 static int assign_queue_slot_by_qid(struct process_queue_manager *pqm,
  47                                     unsigned int qid)
  48 {
  49         if (qid >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS)
  50                 return -EINVAL;
  51
  52         if (__test_and_set_bit(qid, pqm->queue_slot_bitmap)) {
  53                 pr_err("Cannot create new queue because requested qid(%u) is in use\n", qid);
  54                 return -ENOSPC;
  55         }
  56
  57         return 0;
  58 }
  59
  60 static int find_available_queue_slot(struct process_queue_manager *pqm,
  61                                         unsigned int *qid)
  62 {
  63         unsigned long found;
  64
  65         found = find_first_zero_bit(pqm->queue_slot_bitmap,
  66                         KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
  67
  68         pr_debug("The new slot id %lu\n", found);
  69
  70         if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
  71                 pr_info("Cannot open more queues for process with pasid 0x%x\n",
  72                                 pqm->process->pasid);
  73                 return -ENOMEM;
  74         }
  75
  76         set_bit(found, pqm->queue_slot_bitmap);
  77         *qid = found;
  78
  79         return 0;
  80 }
  81
  82 void kfd_process_dequeue_from_device(struct kfd_process_device *pdd)
  83 {
  84         struct kfd_dev *dev = pdd->dev;
  85
  86         if (pdd->already_dequeued)
  87                 return;
  88
  89         dev->dqm->ops.process_termination(dev->dqm, &pdd->qpd);
  90         pdd->already_dequeued = true;
  91 }
  92
  93 int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid,
  94                         void *gws)
  95 {
  96         struct kfd_dev *dev = NULL;
  97         struct process_queue_node *pqn;
  98         struct kfd_process_device *pdd;
  99         struct kgd_mem *mem = NULL;
 100         int ret;
 101
 102         pqn = get_queue_by_qid(pqm, qid);
 103         if (!pqn) {
 104                 pr_err("Queue id does not match any known queue\n");
 105                 return -EINVAL;
 106         }
 107
 108         if (pqn->q)
 109                 dev = pqn->q->device;
 110         if (WARN_ON(!dev))
 111                 return -ENODEV;
 112
 113         pdd = kfd_get_process_device_data(dev, pqm->process);
 114         if (!pdd) {
 115                 pr_err("Process device data doesn't exist\n");
 116                 return -EINVAL;
 117         }
 118
 119         /* Only allow one queue per process can have GWS assigned */
 120         if (gws && pdd->qpd.num_gws)
 121                 return -EBUSY;
 122
 123         if (!gws && pdd->qpd.num_gws == 0)
 124                 return -EINVAL;
 125
 126         if (gws)
 127                 ret = amdgpu_amdkfd_add_gws_to_process(pdd->process->kgd_process_info,
 128                         gws, &mem);
 129         else
 130                 ret = amdgpu_amdkfd_remove_gws_from_process(pdd->process->kgd_process_info,
 131                         pqn->q->gws);
 132         if (unlikely(ret))
 133                 return ret;
 134
 135         pqn->q->gws = mem;
 136         pdd->qpd.num_gws = gws ? dev->adev->gds.gws_size : 0;
 137
 138         return pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 139                                                         pqn->q, NULL);
 140 }
 141
 142 void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
 143 {
 144         int i;
 145
 146         for (i = 0; i < p->n_pdds; i++)
 147                 kfd_process_dequeue_from_device(p->pdds[i]);
 148 }
 149
 150 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
 151 {
 152         INIT_LIST_HEAD(&pqm->queues);
 153         pqm->queue_slot_bitmap = bitmap_zalloc(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
 154                                                GFP_KERNEL);
 155         if (!pqm->queue_slot_bitmap)
 156                 return -ENOMEM;
 157         pqm->process = p;
 158
 159         return 0;
 160 }
 161
 162 void pqm_uninit(struct process_queue_manager *pqm)
 163 {
 164         struct process_queue_node *pqn, *next;
 165
 166         list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
 167                 if (pqn->q && pqn->q->gws)
 168                         amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
 169                                 pqn->q->gws);
 170                 kfd_procfs_del_queue(pqn->q);
 171                 uninit_queue(pqn->q);
 172                 list_del(&pqn->process_queue_list);
 173                 kfree(pqn);
 174         }
 175
 176         bitmap_free(pqm->queue_slot_bitmap);
 177         pqm->queue_slot_bitmap = NULL;
 178 }
 179
 180 static int init_user_queue(struct process_queue_manager *pqm,
 181                                 struct kfd_dev *dev, struct queue **q,
 182                                 struct queue_properties *q_properties,
 183                                 struct file *f, unsigned int qid)
 184 {
 185         int retval;
 186
 187         /* Doorbell initialized in user space*/
 188         q_properties->doorbell_ptr = NULL;
 189
 190         /* let DQM handle it*/
 191         q_properties->vmid = 0;
 192         q_properties->queue_id = qid;
 193
 194         retval = init_queue(q, q_properties);
 195         if (retval != 0)
 196                 return retval;
 197
 198         (*q)->device = dev;
 199         (*q)->process = pqm->process;
 200
 201         if (dev->shared_resources.enable_mes) {
 202                 retval = amdgpu_amdkfd_alloc_gtt_mem(dev->adev,
 203                                                 AMDGPU_MES_GANG_CTX_SIZE,
 204                                                 &(*q)->gang_ctx_bo,
 205                                                 &(*q)->gang_ctx_gpu_addr,
 206                                                 &(*q)->gang_ctx_cpu_ptr,
 207                                                 false);
 208                 if (retval) {
 209                         pr_err("failed to allocate gang context bo\n");
 210                         goto cleanup;
 211                 }
 212                 memset((*q)->gang_ctx_cpu_ptr, 0, AMDGPU_MES_GANG_CTX_SIZE);
 213         }
 214
 215         pr_debug("PQM After init queue");
 216         return 0;
 217
 218 cleanup:
 219         if (dev->shared_resources.enable_mes)
 220                 uninit_queue(*q);
 221         return retval;
 222 }
 223
 224 int pqm_create_queue(struct process_queue_manager *pqm,
 225                             struct kfd_dev *dev,
 226                             struct file *f,
 227                             struct queue_properties *properties,
 228                             unsigned int *qid,
 229                             const struct kfd_criu_queue_priv_data *q_data,
 230                             const void *restore_mqd,
 231                             const void *restore_ctl_stack,
 232                             uint32_t *p_doorbell_offset_in_process)
 233 {
 234         int retval;
 235         struct kfd_process_device *pdd;
 236         struct queue *q;
 237         struct process_queue_node *pqn;
 238         struct kernel_queue *kq;
 239         enum kfd_queue_type type = properties->type;
 240         unsigned int max_queues = 127; /* HWS limit */
 241
 242         q = NULL;
 243         kq = NULL;
 244
 245         pdd = kfd_get_process_device_data(dev, pqm->process);
 246         if (!pdd) {
 247                 pr_err("Process device data doesn't exist\n");
 248                 return -1;
 249         }
 250
 251         /*
 252          * for debug process, verify that it is within the static queues limit
 253          * currently limit is set to half of the total avail HQD slots
 254          * If we are just about to create DIQ, the is_debug flag is not set yet
 255          * Hence we also check the type as well
 256          */
 257         if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
 258                 max_queues = dev->device_info.max_no_of_hqd/2;
 259
 260         if (pdd->qpd.queue_count >= max_queues)
 261                 return -ENOSPC;
 262
 263         if (q_data) {
 264                 retval = assign_queue_slot_by_qid(pqm, q_data->q_id);
 265                 *qid = q_data->q_id;
 266         } else
 267                 retval = find_available_queue_slot(pqm, qid);
 268
 269         if (retval != 0)
 270                 return retval;
 271
 272         if (list_empty(&pdd->qpd.queues_list) &&
 273             list_empty(&pdd->qpd.priv_queue_list))
 274                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 275
 276         pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 277         if (!pqn) {
 278                 retval = -ENOMEM;
 279                 goto err_allocate_pqn;
 280         }
 281
 282         switch (type) {
 283         case KFD_QUEUE_TYPE_SDMA:
 284         case KFD_QUEUE_TYPE_SDMA_XGMI:
 285                 /* SDMA queues are always allocated statically no matter
 286                  * which scheduler mode is used. We also do not need to
 287                  * check whether a SDMA queue can be allocated here, because
 288                  * allocate_sdma_queue() in create_queue() has the
 289                  * corresponding check logic.
 290                  */
 291                 retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
 292                 if (retval != 0)
 293                         goto err_create_queue;
 294                 pqn->q = q;
 295                 pqn->kq = NULL;
 296                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
 297                                                     restore_mqd, restore_ctl_stack);
 298                 print_queue(q);
 299                 break;
 300
 301         case KFD_QUEUE_TYPE_COMPUTE:
 302                 /* check if there is over subscription */
 303                 if ((dev->dqm->sched_policy ==
 304                      KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 305                 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 306                 (dev->dqm->active_queue_count >= get_cp_queues_num(dev->dqm)))) {
 307                         pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
 308                         retval = -EPERM;
 309                         goto err_create_queue;
 310                 }
 311
 312                 retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
 313                 if (retval != 0)
 314                         goto err_create_queue;
 315                 pqn->q = q;
 316                 pqn->kq = NULL;
 317                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
 318                                                     restore_mqd, restore_ctl_stack);
 319                 print_queue(q);
 320                 break;
 321         case KFD_QUEUE_TYPE_DIQ:
 322                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 323                 if (!kq) {
 324                         retval = -ENOMEM;
 325                         goto err_create_queue;
 326                 }
 327                 kq->queue->properties.queue_id = *qid;
 328                 pqn->kq = kq;
 329                 pqn->q = NULL;
 330                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 331                                                         kq, &pdd->qpd);
 332                 break;
 333         default:
 334                 WARN(1, "Invalid queue type %d", type);
 335                 retval = -EINVAL;
 336         }
 337
 338         if (retval != 0) {
 339                 pr_err("Pasid 0x%x DQM create queue type %d failed. ret %d\n",
 340                         pqm->process->pasid, type, retval);
 341                 goto err_create_queue;
 342         }
 343
 344         if (q && p_doorbell_offset_in_process)
 345                 /* Return the doorbell offset within the doorbell page
 346                  * to the caller so it can be passed up to user mode
 347                  * (in bytes).
 348                  * There are always 1024 doorbells per process, so in case
 349                  * of 8-byte doorbells, there are two doorbell pages per
 350                  * process.
 351                  */
 352                 *p_doorbell_offset_in_process =
 353                         (q->properties.doorbell_off * sizeof(uint32_t)) &
 354                         (kfd_doorbell_process_slice(dev) - 1);
 355
 356         pr_debug("PQM After DQM create queue\n");
 357
 358         list_add(&pqn->process_queue_list, &pqm->queues);
 359
 360         if (q) {
 361                 pr_debug("PQM done creating queue\n");
 362                 kfd_procfs_add_queue(q);
 363                 print_queue_properties(&q->properties);
 364         }
 365
 366         return retval;
 367
 368 err_create_queue:
 369         uninit_queue(q);
 370         if (kq)
 371                 kernel_queue_uninit(kq, false);
 372         kfree(pqn);
 373 err_allocate_pqn:
 374         /* check if queues list is empty unregister process from device */
 375         clear_bit(*qid, pqm->queue_slot_bitmap);
 376         if (list_empty(&pdd->qpd.queues_list) &&
 377             list_empty(&pdd->qpd.priv_queue_list))
 378                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 379         return retval;
 380 }
 381
 382 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 383 {
 384         struct process_queue_node *pqn;
 385         struct kfd_process_device *pdd;
 386         struct device_queue_manager *dqm;
 387         struct kfd_dev *dev;
 388         int retval;
 389
 390         dqm = NULL;
 391
 392         retval = 0;
 393
 394         pqn = get_queue_by_qid(pqm, qid);
 395         if (!pqn) {
 396                 pr_err("Queue id does not match any known queue\n");
 397                 return -EINVAL;
 398         }
 399
 400         dev = NULL;
 401         if (pqn->kq)
 402                 dev = pqn->kq->dev;
 403         if (pqn->q)
 404                 dev = pqn->q->device;
 405         if (WARN_ON(!dev))
 406                 return -ENODEV;
 407
 408         pdd = kfd_get_process_device_data(dev, pqm->process);
 409         if (!pdd) {
 410                 pr_err("Process device data doesn't exist\n");
 411                 return -1;
 412         }
 413
 414         if (pqn->kq) {
 415                 /* destroy kernel queue (DIQ) */
 416                 dqm = pqn->kq->dev->dqm;
 417                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 418                 kernel_queue_uninit(pqn->kq, false);
 419         }
 420
 421         if (pqn->q) {
 422                 kfd_procfs_del_queue(pqn->q);
 423                 dqm = pqn->q->device->dqm;
 424                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 425                 if (retval) {
 426                         pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n",
 427                                 pqm->process->pasid,
 428                                 pqn->q->properties.queue_id, retval);
 429                         if (retval != -ETIME)
 430                                 goto err_destroy_queue;
 431                 }
 432
 433                 if (pqn->q->gws) {
 434                         amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
 435                                 pqn->q->gws);
 436                         pdd->qpd.num_gws = 0;
 437                 }
 438
 439                 if (dev->shared_resources.enable_mes)
 440                         amdgpu_amdkfd_free_gtt_mem(dev->adev,
 441                                                    pqn->q->gang_ctx_bo);
 442                 uninit_queue(pqn->q);
 443         }
 444
 445         list_del(&pqn->process_queue_list);
 446         kfree(pqn);
 447         clear_bit(qid, pqm->queue_slot_bitmap);
 448
 449         if (list_empty(&pdd->qpd.queues_list) &&
 450             list_empty(&pdd->qpd.priv_queue_list))
 451                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 452
 453 err_destroy_queue:
 454         return retval;
 455 }
 456
 457 int pqm_update_queue_properties(struct process_queue_manager *pqm,
 458                                 unsigned int qid, struct queue_properties *p)
 459 {
 460         int retval;
 461         struct process_queue_node *pqn;
 462
 463         pqn = get_queue_by_qid(pqm, qid);
 464         if (!pqn) {
 465                 pr_debug("No queue %d exists for update operation\n", qid);
 466                 return -EFAULT;
 467         }
 468
 469         pqn->q->properties.queue_address = p->queue_address;
 470         pqn->q->properties.queue_size = p->queue_size;
 471         pqn->q->properties.queue_percent = p->queue_percent;
 472         pqn->q->properties.priority = p->priority;
 473
 474         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 475                                                         pqn->q, NULL);
 476         if (retval != 0)
 477                 return retval;
 478
 479         return 0;
 480 }
 481
 482 int pqm_update_mqd(struct process_queue_manager *pqm,
 483                                 unsigned int qid, struct mqd_update_info *minfo)
 484 {
 485         int retval;
 486         struct process_queue_node *pqn;
 487
 488         pqn = get_queue_by_qid(pqm, qid);
 489         if (!pqn) {
 490                 pr_debug("No queue %d exists for update operation\n", qid);
 491                 return -EFAULT;
 492         }
 493
 494         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 495                                                         pqn->q, minfo);
 496         if (retval != 0)
 497                 return retval;
 498
 499         return 0;
 500 }
 501
 502 struct kernel_queue *pqm_get_kernel_queue(
 503                                         struct process_queue_manager *pqm,
 504                                         unsigned int qid)
 505 {
 506         struct process_queue_node *pqn;
 507
 508         pqn = get_queue_by_qid(pqm, qid);
 509         if (pqn && pqn->kq)
 510                 return pqn->kq;
 511
 512         return NULL;
 513 }
 514
 515 struct queue *pqm_get_user_queue(struct process_queue_manager *pqm,
 516                                         unsigned int qid)
 517 {
 518         struct process_queue_node *pqn;
 519
 520         pqn = get_queue_by_qid(pqm, qid);
 521         return pqn ? pqn->q : NULL;
 522 }
 523
 524 int pqm_get_wave_state(struct process_queue_manager *pqm,
 525                        unsigned int qid,
 526                        void __user *ctl_stack,
 527                        u32 *ctl_stack_used_size,
 528                        u32 *save_area_used_size)
 529 {
 530         struct process_queue_node *pqn;
 531
 532         pqn = get_queue_by_qid(pqm, qid);
 533         if (!pqn) {
 534                 pr_debug("amdkfd: No queue %d exists for operation\n",
 535                          qid);
 536                 return -EFAULT;
 537         }
 538
 539         return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
 540                                                        pqn->q,
 541                                                        ctl_stack,
 542                                                        ctl_stack_used_size,
 543                                                        save_area_used_size);
 544 }
 545
 546 static int get_queue_data_sizes(struct kfd_process_device *pdd,
 547                                 struct queue *q,
 548                                 uint32_t *mqd_size,
 549                                 uint32_t *ctl_stack_size)
 550 {
 551         int ret;
 552
 553         ret = pqm_get_queue_checkpoint_info(&pdd->process->pqm,
 554                                             q->properties.queue_id,
 555                                             mqd_size,
 556                                             ctl_stack_size);
 557         if (ret)
 558                 pr_err("Failed to get queue dump info (%d)\n", ret);
 559
 560         return ret;
 561 }
 562
 563 int kfd_process_get_queue_info(struct kfd_process *p,
 564                                uint32_t *num_queues,
 565                                uint64_t *priv_data_sizes)
 566 {
 567         uint32_t extra_data_sizes = 0;
 568         struct queue *q;
 569         int i;
 570         int ret;
 571
 572         *num_queues = 0;
 573
 574         /* Run over all PDDs of the process */
 575         for (i = 0; i < p->n_pdds; i++) {
 576                 struct kfd_process_device *pdd = p->pdds[i];
 577
 578                 list_for_each_entry(q, &pdd->qpd.queues_list, list) {
 579                         if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
 580                                 q->properties.type == KFD_QUEUE_TYPE_SDMA ||
 581                                 q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
 582                                 uint32_t mqd_size, ctl_stack_size;
 583
 584                                 *num_queues = *num_queues + 1;
 585
 586                                 ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
 587                                 if (ret)
 588                                         return ret;
 589
 590                                 extra_data_sizes += mqd_size + ctl_stack_size;
 591                         } else {
 592                                 pr_err("Unsupported queue type (%d)\n", q->properties.type);
 593                                 return -EOPNOTSUPP;
 594                         }
 595                 }
 596         }
 597         *priv_data_sizes = extra_data_sizes +
 598                                 (*num_queues * sizeof(struct kfd_criu_queue_priv_data));
 599
 600         return 0;
 601 }
 602
 603 static int pqm_checkpoint_mqd(struct process_queue_manager *pqm,
 604                               unsigned int qid,
 605                               void *mqd,
 606                               void *ctl_stack)
 607 {
 608         struct process_queue_node *pqn;
 609
 610         pqn = get_queue_by_qid(pqm, qid);
 611         if (!pqn) {
 612                 pr_debug("amdkfd: No queue %d exists for operation\n", qid);
 613                 return -EFAULT;
 614         }
 615
 616         if (!pqn->q->device->dqm->ops.checkpoint_mqd) {
 617                 pr_err("amdkfd: queue dumping not supported on this device\n");
 618                 return -EOPNOTSUPP;
 619         }
 620
 621         return pqn->q->device->dqm->ops.checkpoint_mqd(pqn->q->device->dqm,
 622                                                        pqn->q, mqd, ctl_stack);
 623 }
 624
 625 static int criu_checkpoint_queue(struct kfd_process_device *pdd,
 626                            struct queue *q,
 627                            struct kfd_criu_queue_priv_data *q_data)
 628 {
 629         uint8_t *mqd, *ctl_stack;
 630         int ret;
 631
 632         mqd = (void *)(q_data + 1);
 633         ctl_stack = mqd + q_data->mqd_size;
 634
 635         q_data->gpu_id = pdd->user_gpu_id;
 636         q_data->type = q->properties.type;
 637         q_data->format = q->properties.format;
 638         q_data->q_id =  q->properties.queue_id;
 639         q_data->q_address = q->properties.queue_address;
 640         q_data->q_size = q->properties.queue_size;
 641         q_data->priority = q->properties.priority;
 642         q_data->q_percent = q->properties.queue_percent;
 643         q_data->read_ptr_addr = (uint64_t)q->properties.read_ptr;
 644         q_data->write_ptr_addr = (uint64_t)q->properties.write_ptr;
 645         q_data->doorbell_id = q->doorbell_id;
 646
 647         q_data->sdma_id = q->sdma_id;
 648
 649         q_data->eop_ring_buffer_address =
 650                 q->properties.eop_ring_buffer_address;
 651
 652         q_data->eop_ring_buffer_size = q->properties.eop_ring_buffer_size;
 653
 654         q_data->ctx_save_restore_area_address =
 655                 q->properties.ctx_save_restore_area_address;
 656
 657         q_data->ctx_save_restore_area_size =
 658                 q->properties.ctx_save_restore_area_size;
 659
 660         q_data->gws = !!q->gws;
 661
 662         ret = pqm_checkpoint_mqd(&pdd->process->pqm, q->properties.queue_id, mqd, ctl_stack);
 663         if (ret) {
 664                 pr_err("Failed checkpoint queue_mqd (%d)\n", ret);
 665                 return ret;
 666         }
 667
 668         pr_debug("Dumping Queue: gpu_id:%x queue_id:%u\n", q_data->gpu_id, q_data->q_id);
 669         return ret;
 670 }
 671
 672 static int criu_checkpoint_queues_device(struct kfd_process_device *pdd,
 673                                    uint8_t __user *user_priv,
 674                                    unsigned int *q_index,
 675                                    uint64_t *queues_priv_data_offset)
 676 {
 677         unsigned int q_private_data_size = 0;
 678         uint8_t *q_private_data = NULL; /* Local buffer to store individual queue private data */
 679         struct queue *q;
 680         int ret = 0;
 681
 682         list_for_each_entry(q, &pdd->qpd.queues_list, list) {
 683                 struct kfd_criu_queue_priv_data *q_data;
 684                 uint64_t q_data_size;
 685                 uint32_t mqd_size;
 686                 uint32_t ctl_stack_size;
 687
 688                 if (q->properties.type != KFD_QUEUE_TYPE_COMPUTE &&
 689                         q->properties.type != KFD_QUEUE_TYPE_SDMA &&
 690                         q->properties.type != KFD_QUEUE_TYPE_SDMA_XGMI) {
 691
 692                         pr_err("Unsupported queue type (%d)\n", q->properties.type);
 693                         ret = -EOPNOTSUPP;
 694                         break;
 695                 }
 696
 697                 ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
 698                 if (ret)
 699                         break;
 700
 701                 q_data_size = sizeof(*q_data) + mqd_size + ctl_stack_size;
 702
 703                 /* Increase local buffer space if needed */
 704                 if (q_private_data_size < q_data_size) {
 705                         kfree(q_private_data);
 706
 707                         q_private_data = kzalloc(q_data_size, GFP_KERNEL);
 708                         if (!q_private_data) {
 709                                 ret = -ENOMEM;
 710                                 break;
 711                         }
 712                         q_private_data_size = q_data_size;
 713                 }
 714
 715                 q_data = (struct kfd_criu_queue_priv_data *)q_private_data;
 716
 717                 /* data stored in this order: priv_data, mqd, ctl_stack */
 718                 q_data->mqd_size = mqd_size;
 719                 q_data->ctl_stack_size = ctl_stack_size;
 720
 721                 ret = criu_checkpoint_queue(pdd, q, q_data);
 722                 if (ret)
 723                         break;
 724
 725                 q_data->object_type = KFD_CRIU_OBJECT_TYPE_QUEUE;
 726
 727                 ret = copy_to_user(user_priv + *queues_priv_data_offset,
 728                                 q_data, q_data_size);
 729                 if (ret) {
 730                         ret = -EFAULT;
 731                         break;
 732                 }
 733                 *queues_priv_data_offset += q_data_size;
 734                 *q_index = *q_index + 1;
 735         }
 736
 737         kfree(q_private_data);
 738
 739         return ret;
 740 }
 741
 742 int kfd_criu_checkpoint_queues(struct kfd_process *p,
 743                          uint8_t __user *user_priv_data,
 744                          uint64_t *priv_data_offset)
 745 {
 746         int ret = 0, pdd_index, q_index = 0;
 747
 748         for (pdd_index = 0; pdd_index < p->n_pdds; pdd_index++) {
 749                 struct kfd_process_device *pdd = p->pdds[pdd_index];
 750
 751                 /*
 752                  * criu_checkpoint_queues_device will copy data to user and update q_index and
 753                  * queues_priv_data_offset
 754                  */
 755                 ret = criu_checkpoint_queues_device(pdd, user_priv_data, &q_index,
 756                                               priv_data_offset);
 757
 758                 if (ret)
 759                         break;
 760         }
 761
 762         return ret;
 763 }
 764
 765 static void set_queue_properties_from_criu(struct queue_properties *qp,
 766                                           struct kfd_criu_queue_priv_data *q_data)
 767 {
 768         qp->is_interop = false;
 769         qp->queue_percent = q_data->q_percent;
 770         qp->priority = q_data->priority;
 771         qp->queue_address = q_data->q_address;
 772         qp->queue_size = q_data->q_size;
 773         qp->read_ptr = (uint32_t *) q_data->read_ptr_addr;
 774         qp->write_ptr = (uint32_t *) q_data->write_ptr_addr;
 775         qp->eop_ring_buffer_address = q_data->eop_ring_buffer_address;
 776         qp->eop_ring_buffer_size = q_data->eop_ring_buffer_size;
 777         qp->ctx_save_restore_area_address = q_data->ctx_save_restore_area_address;
 778         qp->ctx_save_restore_area_size = q_data->ctx_save_restore_area_size;
 779         qp->ctl_stack_size = q_data->ctl_stack_size;
 780         qp->type = q_data->type;
 781         qp->format = q_data->format;
 782 }
 783
 784 int kfd_criu_restore_queue(struct kfd_process *p,
 785                            uint8_t __user *user_priv_ptr,
 786                            uint64_t *priv_data_offset,
 787                            uint64_t max_priv_data_size)
 788 {
 789         uint8_t *mqd, *ctl_stack, *q_extra_data = NULL;
 790         struct kfd_criu_queue_priv_data *q_data;
 791         struct kfd_process_device *pdd;
 792         uint64_t q_extra_data_size;
 793         struct queue_properties qp;
 794         unsigned int queue_id;
 795         int ret = 0;
 796
 797         if (*priv_data_offset + sizeof(*q_data) > max_priv_data_size)
 798                 return -EINVAL;
 799
 800         q_data = kmalloc(sizeof(*q_data), GFP_KERNEL);
 801         if (!q_data)
 802                 return -ENOMEM;
 803
 804         ret = copy_from_user(q_data, user_priv_ptr + *priv_data_offset, sizeof(*q_data));
 805         if (ret) {
 806                 ret = -EFAULT;
 807                 goto exit;
 808         }
 809
 810         *priv_data_offset += sizeof(*q_data);
 811         q_extra_data_size = (uint64_t)q_data->ctl_stack_size + q_data->mqd_size;
 812
 813         if (*priv_data_offset + q_extra_data_size > max_priv_data_size) {
 814                 ret = -EINVAL;
 815                 goto exit;
 816         }
 817
 818         q_extra_data = kmalloc(q_extra_data_size, GFP_KERNEL);
 819         if (!q_extra_data) {
 820                 ret = -ENOMEM;
 821                 goto exit;
 822         }
 823
 824         ret = copy_from_user(q_extra_data, user_priv_ptr + *priv_data_offset, q_extra_data_size);
 825         if (ret) {
 826                 ret = -EFAULT;
 827                 goto exit;
 828         }
 829
 830         *priv_data_offset += q_extra_data_size;
 831
 832         pdd = kfd_process_device_data_by_id(p, q_data->gpu_id);
 833         if (!pdd) {
 834                 pr_err("Failed to get pdd\n");
 835                 ret = -EINVAL;
 836                 goto exit;
 837         }
 838         /* data stored in this order: mqd, ctl_stack */
 839         mqd = q_extra_data;
 840         ctl_stack = mqd + q_data->mqd_size;
 841
 842         memset(&qp, 0, sizeof(qp));
 843         set_queue_properties_from_criu(&qp, q_data);
 844
 845         print_queue_properties(&qp);
 846
 847         ret = pqm_create_queue(&p->pqm, pdd->dev, NULL, &qp, &queue_id, q_data, mqd, ctl_stack,
 848                                 NULL);
 849         if (ret) {
 850                 pr_err("Failed to create new queue err:%d\n", ret);
 851                 goto exit;
 852         }
 853
 854         if (q_data->gws)
 855                 ret = pqm_set_gws(&p->pqm, q_data->q_id, pdd->dev->gws);
 856
 857 exit:
 858         if (ret)
 859                 pr_err("Failed to restore queue (%d)\n", ret);
 860         else
 861                 pr_debug("Queue id %d was restored successfully\n", queue_id);
 862
 863         kfree(q_data);
 864
 865         return ret;
 866 }
 867
 868 int pqm_get_queue_checkpoint_info(struct process_queue_manager *pqm,
 869                                   unsigned int qid,
 870                                   uint32_t *mqd_size,
 871                                   uint32_t *ctl_stack_size)
 872 {
 873         struct process_queue_node *pqn;
 874
 875         pqn = get_queue_by_qid(pqm, qid);
 876         if (!pqn) {
 877                 pr_debug("amdkfd: No queue %d exists for operation\n", qid);
 878                 return -EFAULT;
 879         }
 880
 881         if (!pqn->q->device->dqm->ops.get_queue_checkpoint_info) {
 882                 pr_err("amdkfd: queue dumping not supported on this device\n");
 883                 return -EOPNOTSUPP;
 884         }
 885
 886         pqn->q->device->dqm->ops.get_queue_checkpoint_info(pqn->q->device->dqm,
 887                                                        pqn->q, mqd_size,
 888                                                        ctl_stack_size);
 889         return 0;
 890 }
 891
 892 #if defined(CONFIG_DEBUG_FS)
 893
 894 int pqm_debugfs_mqds(struct seq_file *m, void *data)
 895 {
 896         struct process_queue_manager *pqm = data;
 897         struct process_queue_node *pqn;
 898         struct queue *q;
 899         enum KFD_MQD_TYPE mqd_type;
 900         struct mqd_manager *mqd_mgr;
 901         int r = 0;
 902
 903         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 904                 if (pqn->q) {
 905                         q = pqn->q;
 906                         switch (q->properties.type) {
 907                         case KFD_QUEUE_TYPE_SDMA:
 908                         case KFD_QUEUE_TYPE_SDMA_XGMI:
 909                                 seq_printf(m, "  SDMA queue on device %x\n",
 910                                            q->device->id);
 911                                 mqd_type = KFD_MQD_TYPE_SDMA;
 912                                 break;
 913                         case KFD_QUEUE_TYPE_COMPUTE:
 914                                 seq_printf(m, "  Compute queue on device %x\n",
 915                                            q->device->id);
 916                                 mqd_type = KFD_MQD_TYPE_CP;
 917                                 break;
 918                         default:
 919                                 seq_printf(m,
 920                                 "  Bad user queue type %d on device %x\n",
 921                                            q->properties.type, q->device->id);
 922                                 continue;
 923                         }
 924                         mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
 925                 } else if (pqn->kq) {
 926                         q = pqn->kq->queue;
 927                         mqd_mgr = pqn->kq->mqd_mgr;
 928                         switch (q->properties.type) {
 929                         case KFD_QUEUE_TYPE_DIQ:
 930                                 seq_printf(m, "  DIQ on device %x\n",
 931                                            pqn->kq->dev->id);
 932                                 break;
 933                         default:
 934                                 seq_printf(m,
 935                                 "  Bad kernel queue type %d on device %x\n",
 936                                            q->properties.type,
 937                                            pqn->kq->dev->id);
 938                                 continue;
 939                         }
 940                 } else {
 941                         seq_printf(m,
 942                 "  Weird: Queue node with neither kernel nor user queue\n");
 943                         continue;
 944                 }
 945
 946                 r = mqd_mgr->debugfs_show_mqd(m, q->mqd);
 947                 if (r != 0)
 948                         break;
 949         }
 950
 951         return r;
 952 }
 953
 954 #endif