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

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