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, struct amdgpu_bo *wptr_bo,
 184                                 unsigned int qid)
 185 {
 186         int retval;
 187
 188         /* Doorbell initialized in user space*/
 189         q_properties->doorbell_ptr = NULL;
 190
 191         /* let DQM handle it*/
 192         q_properties->vmid = 0;
 193         q_properties->queue_id = qid;
 194
 195         retval = init_queue(q, q_properties);
 196         if (retval != 0)
 197                 return retval;
 198
 199         (*q)->device = dev;
 200         (*q)->process = pqm->process;
 201
 202         if (dev->shared_resources.enable_mes) {
 203                 retval = amdgpu_amdkfd_alloc_gtt_mem(dev->adev,
 204                                                 AMDGPU_MES_GANG_CTX_SIZE,
 205                                                 &(*q)->gang_ctx_bo,
 206                                                 &(*q)->gang_ctx_gpu_addr,
 207                                                 &(*q)->gang_ctx_cpu_ptr,
 208                                                 false);
 209                 if (retval) {
 210                         pr_err("failed to allocate gang context bo\n");
 211                         goto cleanup;
 212                 }
 213                 memset((*q)->gang_ctx_cpu_ptr, 0, AMDGPU_MES_GANG_CTX_SIZE);
 214                 (*q)->wptr_bo = wptr_bo;
 215         }
 216
 217         pr_debug("PQM After init queue");
 218         return 0;
 219
 220 cleanup:
 221         if (dev->shared_resources.enable_mes)
 222                 uninit_queue(*q);
 223         return retval;
 224 }
 225
 226 int pqm_create_queue(struct process_queue_manager *pqm,
 227                             struct kfd_dev *dev,
 228                             struct file *f,
 229                             struct queue_properties *properties,
 230                             unsigned int *qid,
 231                             struct amdgpu_bo *wptr_bo,
 232                             const struct kfd_criu_queue_priv_data *q_data,
 233                             const void *restore_mqd,
 234                             const void *restore_ctl_stack,
 235                             uint32_t *p_doorbell_offset_in_process)
 236 {
 237         int retval;
 238         struct kfd_process_device *pdd;
 239         struct queue *q;
 240         struct process_queue_node *pqn;
 241         struct kernel_queue *kq;
 242         enum kfd_queue_type type = properties->type;
 243         unsigned int max_queues = 127; /* HWS limit */
 244
 245         q = NULL;
 246         kq = NULL;
 247
 248         pdd = kfd_get_process_device_data(dev, pqm->process);
 249         if (!pdd) {
 250                 pr_err("Process device data doesn't exist\n");
 251                 return -1;
 252         }
 253
 254         /*
 255          * for debug process, verify that it is within the static queues limit
 256          * currently limit is set to half of the total avail HQD slots
 257          * If we are just about to create DIQ, the is_debug flag is not set yet
 258          * Hence we also check the type as well
 259          */
 260         if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
 261                 max_queues = dev->device_info.max_no_of_hqd/2;
 262
 263         if (pdd->qpd.queue_count >= max_queues)
 264                 return -ENOSPC;
 265
 266         if (q_data) {
 267                 retval = assign_queue_slot_by_qid(pqm, q_data->q_id);
 268                 *qid = q_data->q_id;
 269         } else
 270                 retval = find_available_queue_slot(pqm, qid);
 271
 272         if (retval != 0)
 273                 return retval;
 274
 275         if (list_empty(&pdd->qpd.queues_list) &&
 276             list_empty(&pdd->qpd.priv_queue_list))
 277                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 278
 279         pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 280         if (!pqn) {
 281                 retval = -ENOMEM;
 282                 goto err_allocate_pqn;
 283         }
 284
 285         switch (type) {
 286         case KFD_QUEUE_TYPE_SDMA:
 287         case KFD_QUEUE_TYPE_SDMA_XGMI:
 288                 /* SDMA queues are always allocated statically no matter
 289                  * which scheduler mode is used. We also do not need to
 290                  * check whether a SDMA queue can be allocated here, because
 291                  * allocate_sdma_queue() in create_queue() has the
 292                  * corresponding check logic.
 293                  */
 294                 retval = init_user_queue(pqm, dev, &q, properties, f, wptr_bo, *qid);
 295                 if (retval != 0)
 296                         goto err_create_queue;
 297                 pqn->q = q;
 298                 pqn->kq = NULL;
 299                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
 300                                                     restore_mqd, restore_ctl_stack);
 301                 print_queue(q);
 302                 break;
 303
 304         case KFD_QUEUE_TYPE_COMPUTE:
 305                 /* check if there is over subscription */
 306                 if ((dev->dqm->sched_policy ==
 307                      KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 308                 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 309                 (dev->dqm->active_queue_count >= get_cp_queues_num(dev->dqm)))) {
 310                         pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
 311                         retval = -EPERM;
 312                         goto err_create_queue;
 313                 }
 314
 315                 retval = init_user_queue(pqm, dev, &q, properties, f, wptr_bo, *qid);
 316                 if (retval != 0)
 317                         goto err_create_queue;
 318                 pqn->q = q;
 319                 pqn->kq = NULL;
 320                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
 321                                                     restore_mqd, restore_ctl_stack);
 322                 print_queue(q);
 323                 break;
 324         case KFD_QUEUE_TYPE_DIQ:
 325                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 326                 if (!kq) {
 327                         retval = -ENOMEM;
 328                         goto err_create_queue;
 329                 }
 330                 kq->queue->properties.queue_id = *qid;
 331                 pqn->kq = kq;
 332                 pqn->q = NULL;
 333                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 334                                                         kq, &pdd->qpd);
 335                 break;
 336         default:
 337                 WARN(1, "Invalid queue type %d", type);
 338                 retval = -EINVAL;
 339         }
 340
 341         if (retval != 0) {
 342                 pr_err("Pasid 0x%x DQM create queue type %d failed. ret %d\n",
 343                         pqm->process->pasid, type, retval);
 344                 goto err_create_queue;
 345         }
 346
 347         if (q && p_doorbell_offset_in_process)
 348                 /* Return the doorbell offset within the doorbell page
 349                  * to the caller so it can be passed up to user mode
 350                  * (in bytes).
 351                  * There are always 1024 doorbells per process, so in case
 352                  * of 8-byte doorbells, there are two doorbell pages per
 353                  * process.
 354                  */
 355                 *p_doorbell_offset_in_process =
 356                         (q->properties.doorbell_off * sizeof(uint32_t)) &
 357                         (kfd_doorbell_process_slice(dev) - 1);
 358
 359         pr_debug("PQM After DQM create queue\n");
 360
 361         list_add(&pqn->process_queue_list, &pqm->queues);
 362
 363         if (q) {
 364                 pr_debug("PQM done creating queue\n");
 365                 kfd_procfs_add_queue(q);
 366                 print_queue_properties(&q->properties);
 367         }
 368
 369         return retval;
 370
 371 err_create_queue:
 372         uninit_queue(q);
 373         if (kq)
 374                 kernel_queue_uninit(kq, false);
 375         kfree(pqn);
 376 err_allocate_pqn:
 377         /* check if queues list is empty unregister process from device */
 378         clear_bit(*qid, pqm->queue_slot_bitmap);
 379         if (list_empty(&pdd->qpd.queues_list) &&
 380             list_empty(&pdd->qpd.priv_queue_list))
 381                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 382         return retval;
 383 }
 384
 385 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 386 {
 387         struct process_queue_node *pqn;
 388         struct kfd_process_device *pdd;
 389         struct device_queue_manager *dqm;
 390         struct kfd_dev *dev;
 391         int retval;
 392
 393         dqm = NULL;
 394
 395         retval = 0;
 396
 397         pqn = get_queue_by_qid(pqm, qid);
 398         if (!pqn) {
 399                 pr_err("Queue id does not match any known queue\n");
 400                 return -EINVAL;
 401         }
 402
 403         dev = NULL;
 404         if (pqn->kq)
 405                 dev = pqn->kq->dev;
 406         if (pqn->q)
 407                 dev = pqn->q->device;
 408         if (WARN_ON(!dev))
 409                 return -ENODEV;
 410
 411         pdd = kfd_get_process_device_data(dev, pqm->process);
 412         if (!pdd) {
 413                 pr_err("Process device data doesn't exist\n");
 414                 return -1;
 415         }
 416
 417         if (pqn->kq) {
 418                 /* destroy kernel queue (DIQ) */
 419                 dqm = pqn->kq->dev->dqm;
 420                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 421                 kernel_queue_uninit(pqn->kq, false);
 422         }
 423
 424         if (pqn->q) {
 425                 kfd_procfs_del_queue(pqn->q);
 426                 dqm = pqn->q->device->dqm;
 427                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 428                 if (retval) {
 429                         pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n",
 430                                 pqm->process->pasid,
 431                                 pqn->q->properties.queue_id, retval);
 432                         if (retval != -ETIME)
 433                                 goto err_destroy_queue;
 434                 }
 435
 436                 if (pqn->q->gws) {
 437                         amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
 438                                 pqn->q->gws);
 439                         pdd->qpd.num_gws = 0;
 440                 }
 441
 442                 if (dev->shared_resources.enable_mes) {
 443                         amdgpu_amdkfd_free_gtt_mem(dev->adev,
 444                                                    pqn->q->gang_ctx_bo);
 445                         if (pqn->q->wptr_bo)
 446                                 amdgpu_amdkfd_free_gtt_mem(dev->adev, pqn->q->wptr_bo);
 447
 448                 }
 449                 uninit_queue(pqn->q);
 450         }
 451
 452         list_del(&pqn->process_queue_list);
 453         kfree(pqn);
 454         clear_bit(qid, pqm->queue_slot_bitmap);
 455
 456         if (list_empty(&pdd->qpd.queues_list) &&
 457             list_empty(&pdd->qpd.priv_queue_list))
 458                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 459
 460 err_destroy_queue:
 461         return retval;
 462 }
 463
 464 int pqm_update_queue_properties(struct process_queue_manager *pqm,
 465                                 unsigned int qid, struct queue_properties *p)
 466 {
 467         int retval;
 468         struct process_queue_node *pqn;
 469
 470         pqn = get_queue_by_qid(pqm, qid);
 471         if (!pqn) {
 472                 pr_debug("No queue %d exists for update operation\n", qid);
 473                 return -EFAULT;
 474         }
 475
 476         pqn->q->properties.queue_address = p->queue_address;
 477         pqn->q->properties.queue_size = p->queue_size;
 478         pqn->q->properties.queue_percent = p->queue_percent;
 479         pqn->q->properties.priority = p->priority;
 480
 481         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 482                                                         pqn->q, NULL);
 483         if (retval != 0)
 484                 return retval;
 485
 486         return 0;
 487 }
 488
 489 int pqm_update_mqd(struct process_queue_manager *pqm,
 490                                 unsigned int qid, struct mqd_update_info *minfo)
 491 {
 492         int retval;
 493         struct process_queue_node *pqn;
 494
 495         pqn = get_queue_by_qid(pqm, qid);
 496         if (!pqn) {
 497                 pr_debug("No queue %d exists for update operation\n", qid);
 498                 return -EFAULT;
 499         }
 500
 501         /* ASICs that have WGPs must enforce pairwise enabled mask checks. */
 502         if (minfo && minfo->update_flag == UPDATE_FLAG_CU_MASK && minfo->cu_mask.ptr &&
 503                         KFD_GC_VERSION(pqn->q->device) >= IP_VERSION(10, 0, 0)) {
 504                 int i;
 505
 506                 for (i = 0; i < minfo->cu_mask.count; i += 2) {
 507                         uint32_t cu_pair = (minfo->cu_mask.ptr[i / 32] >> (i % 32)) & 0x3;
 508
 509                         if (cu_pair && cu_pair != 0x3) {
 510                                 pr_debug("CUs must be adjacent pairwise enabled.\n");
 511                                 return -EINVAL;
 512                         }
 513                 }
 514         }
 515
 516         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 517                                                         pqn->q, minfo);
 518         if (retval != 0)
 519                 return retval;
 520
 521         return 0;
 522 }
 523
 524 struct kernel_queue *pqm_get_kernel_queue(
 525                                         struct process_queue_manager *pqm,
 526                                         unsigned int qid)
 527 {
 528         struct process_queue_node *pqn;
 529
 530         pqn = get_queue_by_qid(pqm, qid);
 531         if (pqn && pqn->kq)
 532                 return pqn->kq;
 533
 534         return NULL;
 535 }
 536
 537 struct queue *pqm_get_user_queue(struct process_queue_manager *pqm,
 538                                         unsigned int qid)
 539 {
 540         struct process_queue_node *pqn;
 541
 542         pqn = get_queue_by_qid(pqm, qid);
 543         return pqn ? pqn->q : NULL;
 544 }
 545
 546 int pqm_get_wave_state(struct process_queue_manager *pqm,
 547                        unsigned int qid,
 548                        void __user *ctl_stack,
 549                        u32 *ctl_stack_used_size,
 550                        u32 *save_area_used_size)
 551 {
 552         struct process_queue_node *pqn;
 553
 554         pqn = get_queue_by_qid(pqm, qid);
 555         if (!pqn) {
 556                 pr_debug("amdkfd: No queue %d exists for operation\n",
 557                          qid);
 558                 return -EFAULT;
 559         }
 560
 561         return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
 562                                                        pqn->q,
 563                                                        ctl_stack,
 564                                                        ctl_stack_used_size,
 565                                                        save_area_used_size);
 566 }
 567
 568 static int get_queue_data_sizes(struct kfd_process_device *pdd,
 569                                 struct queue *q,
 570                                 uint32_t *mqd_size,
 571                                 uint32_t *ctl_stack_size)
 572 {
 573         int ret;
 574
 575         ret = pqm_get_queue_checkpoint_info(&pdd->process->pqm,
 576                                             q->properties.queue_id,
 577                                             mqd_size,
 578                                             ctl_stack_size);
 579         if (ret)
 580                 pr_err("Failed to get queue dump info (%d)\n", ret);
 581
 582         return ret;
 583 }
 584
 585 int kfd_process_get_queue_info(struct kfd_process *p,
 586                                uint32_t *num_queues,
 587                                uint64_t *priv_data_sizes)
 588 {
 589         uint32_t extra_data_sizes = 0;
 590         struct queue *q;
 591         int i;
 592         int ret;
 593
 594         *num_queues = 0;
 595
 596         /* Run over all PDDs of the process */
 597         for (i = 0; i < p->n_pdds; i++) {
 598                 struct kfd_process_device *pdd = p->pdds[i];
 599
 600                 list_for_each_entry(q, &pdd->qpd.queues_list, list) {
 601                         if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
 602                                 q->properties.type == KFD_QUEUE_TYPE_SDMA ||
 603                                 q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
 604                                 uint32_t mqd_size, ctl_stack_size;
 605
 606                                 *num_queues = *num_queues + 1;
 607
 608                                 ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
 609                                 if (ret)
 610                                         return ret;
 611
 612                                 extra_data_sizes += mqd_size + ctl_stack_size;
 613                         } else {
 614                                 pr_err("Unsupported queue type (%d)\n", q->properties.type);
 615                                 return -EOPNOTSUPP;
 616                         }
 617                 }
 618         }
 619         *priv_data_sizes = extra_data_sizes +
 620                                 (*num_queues * sizeof(struct kfd_criu_queue_priv_data));
 621
 622         return 0;
 623 }
 624
 625 static int pqm_checkpoint_mqd(struct process_queue_manager *pqm,
 626                               unsigned int qid,
 627                               void *mqd,
 628                               void *ctl_stack)
 629 {
 630         struct process_queue_node *pqn;
 631
 632         pqn = get_queue_by_qid(pqm, qid);
 633         if (!pqn) {
 634                 pr_debug("amdkfd: No queue %d exists for operation\n", qid);
 635                 return -EFAULT;
 636         }
 637
 638         if (!pqn->q->device->dqm->ops.checkpoint_mqd) {
 639                 pr_err("amdkfd: queue dumping not supported on this device\n");
 640                 return -EOPNOTSUPP;
 641         }
 642
 643         return pqn->q->device->dqm->ops.checkpoint_mqd(pqn->q->device->dqm,
 644                                                        pqn->q, mqd, ctl_stack);
 645 }
 646
 647 static int criu_checkpoint_queue(struct kfd_process_device *pdd,
 648                            struct queue *q,
 649                            struct kfd_criu_queue_priv_data *q_data)
 650 {
 651         uint8_t *mqd, *ctl_stack;
 652         int ret;
 653
 654         mqd = (void *)(q_data + 1);
 655         ctl_stack = mqd + q_data->mqd_size;
 656
 657         q_data->gpu_id = pdd->user_gpu_id;
 658         q_data->type = q->properties.type;
 659         q_data->format = q->properties.format;
 660         q_data->q_id =  q->properties.queue_id;
 661         q_data->q_address = q->properties.queue_address;
 662         q_data->q_size = q->properties.queue_size;
 663         q_data->priority = q->properties.priority;
 664         q_data->q_percent = q->properties.queue_percent;
 665         q_data->read_ptr_addr = (uint64_t)q->properties.read_ptr;
 666         q_data->write_ptr_addr = (uint64_t)q->properties.write_ptr;
 667         q_data->doorbell_id = q->doorbell_id;
 668
 669         q_data->sdma_id = q->sdma_id;
 670
 671         q_data->eop_ring_buffer_address =
 672                 q->properties.eop_ring_buffer_address;
 673
 674         q_data->eop_ring_buffer_size = q->properties.eop_ring_buffer_size;
 675
 676         q_data->ctx_save_restore_area_address =
 677                 q->properties.ctx_save_restore_area_address;
 678
 679         q_data->ctx_save_restore_area_size =
 680                 q->properties.ctx_save_restore_area_size;
 681
 682         q_data->gws = !!q->gws;
 683
 684         ret = pqm_checkpoint_mqd(&pdd->process->pqm, q->properties.queue_id, mqd, ctl_stack);
 685         if (ret) {
 686                 pr_err("Failed checkpoint queue_mqd (%d)\n", ret);
 687                 return ret;
 688         }
 689
 690         pr_debug("Dumping Queue: gpu_id:%x queue_id:%u\n", q_data->gpu_id, q_data->q_id);
 691         return ret;
 692 }
 693
 694 static int criu_checkpoint_queues_device(struct kfd_process_device *pdd,
 695                                    uint8_t __user *user_priv,
 696                                    unsigned int *q_index,
 697                                    uint64_t *queues_priv_data_offset)
 698 {
 699         unsigned int q_private_data_size = 0;
 700         uint8_t *q_private_data = NULL; /* Local buffer to store individual queue private data */
 701         struct queue *q;
 702         int ret = 0;
 703
 704         list_for_each_entry(q, &pdd->qpd.queues_list, list) {
 705                 struct kfd_criu_queue_priv_data *q_data;
 706                 uint64_t q_data_size;
 707                 uint32_t mqd_size;
 708                 uint32_t ctl_stack_size;
 709
 710                 if (q->properties.type != KFD_QUEUE_TYPE_COMPUTE &&
 711                         q->properties.type != KFD_QUEUE_TYPE_SDMA &&
 712                         q->properties.type != KFD_QUEUE_TYPE_SDMA_XGMI) {
 713
 714                         pr_err("Unsupported queue type (%d)\n", q->properties.type);
 715                         ret = -EOPNOTSUPP;
 716                         break;
 717                 }
 718
 719                 ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
 720                 if (ret)
 721                         break;
 722
 723                 q_data_size = sizeof(*q_data) + mqd_size + ctl_stack_size;
 724
 725                 /* Increase local buffer space if needed */
 726                 if (q_private_data_size < q_data_size) {
 727                         kfree(q_private_data);
 728
 729                         q_private_data = kzalloc(q_data_size, GFP_KERNEL);
 730                         if (!q_private_data) {
 731                                 ret = -ENOMEM;
 732                                 break;
 733                         }
 734                         q_private_data_size = q_data_size;
 735                 }
 736
 737                 q_data = (struct kfd_criu_queue_priv_data *)q_private_data;
 738
 739                 /* data stored in this order: priv_data, mqd, ctl_stack */
 740                 q_data->mqd_size = mqd_size;
 741                 q_data->ctl_stack_size = ctl_stack_size;
 742
 743                 ret = criu_checkpoint_queue(pdd, q, q_data);
 744                 if (ret)
 745                         break;
 746
 747                 q_data->object_type = KFD_CRIU_OBJECT_TYPE_QUEUE;
 748
 749                 ret = copy_to_user(user_priv + *queues_priv_data_offset,
 750                                 q_data, q_data_size);
 751                 if (ret) {
 752                         ret = -EFAULT;
 753                         break;
 754                 }
 755                 *queues_priv_data_offset += q_data_size;
 756                 *q_index = *q_index + 1;
 757         }
 758
 759         kfree(q_private_data);
 760
 761         return ret;
 762 }
 763
 764 int kfd_criu_checkpoint_queues(struct kfd_process *p,
 765                          uint8_t __user *user_priv_data,
 766                          uint64_t *priv_data_offset)
 767 {
 768         int ret = 0, pdd_index, q_index = 0;
 769
 770         for (pdd_index = 0; pdd_index < p->n_pdds; pdd_index++) {
 771                 struct kfd_process_device *pdd = p->pdds[pdd_index];
 772
 773                 /*
 774                  * criu_checkpoint_queues_device will copy data to user and update q_index and
 775                  * queues_priv_data_offset
 776                  */
 777                 ret = criu_checkpoint_queues_device(pdd, user_priv_data, &q_index,
 778                                               priv_data_offset);
 779
 780                 if (ret)
 781                         break;
 782         }
 783
 784         return ret;
 785 }
 786
 787 static void set_queue_properties_from_criu(struct queue_properties *qp,
 788                                           struct kfd_criu_queue_priv_data *q_data)
 789 {
 790         qp->is_interop = false;
 791         qp->queue_percent = q_data->q_percent;
 792         qp->priority = q_data->priority;
 793         qp->queue_address = q_data->q_address;
 794         qp->queue_size = q_data->q_size;
 795         qp->read_ptr = (uint32_t *) q_data->read_ptr_addr;
 796         qp->write_ptr = (uint32_t *) q_data->write_ptr_addr;
 797         qp->eop_ring_buffer_address = q_data->eop_ring_buffer_address;
 798         qp->eop_ring_buffer_size = q_data->eop_ring_buffer_size;
 799         qp->ctx_save_restore_area_address = q_data->ctx_save_restore_area_address;
 800         qp->ctx_save_restore_area_size = q_data->ctx_save_restore_area_size;
 801         qp->ctl_stack_size = q_data->ctl_stack_size;
 802         qp->type = q_data->type;
 803         qp->format = q_data->format;
 804 }
 805
 806 int kfd_criu_restore_queue(struct kfd_process *p,
 807                            uint8_t __user *user_priv_ptr,
 808                            uint64_t *priv_data_offset,
 809                            uint64_t max_priv_data_size)
 810 {
 811         uint8_t *mqd, *ctl_stack, *q_extra_data = NULL;
 812         struct kfd_criu_queue_priv_data *q_data;
 813         struct kfd_process_device *pdd;
 814         uint64_t q_extra_data_size;
 815         struct queue_properties qp;
 816         unsigned int queue_id;
 817         int ret = 0;
 818
 819         if (*priv_data_offset + sizeof(*q_data) > max_priv_data_size)
 820                 return -EINVAL;
 821
 822         q_data = kmalloc(sizeof(*q_data), GFP_KERNEL);
 823         if (!q_data)
 824                 return -ENOMEM;
 825
 826         ret = copy_from_user(q_data, user_priv_ptr + *priv_data_offset, sizeof(*q_data));
 827         if (ret) {
 828                 ret = -EFAULT;
 829                 goto exit;
 830         }
 831
 832         *priv_data_offset += sizeof(*q_data);
 833         q_extra_data_size = (uint64_t)q_data->ctl_stack_size + q_data->mqd_size;
 834
 835         if (*priv_data_offset + q_extra_data_size > max_priv_data_size) {
 836                 ret = -EINVAL;
 837                 goto exit;
 838         }
 839
 840         q_extra_data = kmalloc(q_extra_data_size, GFP_KERNEL);
 841         if (!q_extra_data) {
 842                 ret = -ENOMEM;
 843                 goto exit;
 844         }
 845
 846         ret = copy_from_user(q_extra_data, user_priv_ptr + *priv_data_offset, q_extra_data_size);
 847         if (ret) {
 848                 ret = -EFAULT;
 849                 goto exit;
 850         }
 851
 852         *priv_data_offset += q_extra_data_size;
 853
 854         pdd = kfd_process_device_data_by_id(p, q_data->gpu_id);
 855         if (!pdd) {
 856                 pr_err("Failed to get pdd\n");
 857                 ret = -EINVAL;
 858                 goto exit;
 859         }
 860         /* data stored in this order: mqd, ctl_stack */
 861         mqd = q_extra_data;
 862         ctl_stack = mqd + q_data->mqd_size;
 863
 864         memset(&qp, 0, sizeof(qp));
 865         set_queue_properties_from_criu(&qp, q_data);
 866
 867         print_queue_properties(&qp);
 868
 869         ret = pqm_create_queue(&p->pqm, pdd->dev, NULL, &qp, &queue_id, NULL, q_data, mqd, ctl_stack,
 870                                 NULL);
 871         if (ret) {
 872                 pr_err("Failed to create new queue err:%d\n", ret);
 873                 goto exit;
 874         }
 875
 876         if (q_data->gws)
 877                 ret = pqm_set_gws(&p->pqm, q_data->q_id, pdd->dev->gws);
 878
 879 exit:
 880         if (ret)
 881                 pr_err("Failed to restore queue (%d)\n", ret);
 882         else
 883                 pr_debug("Queue id %d was restored successfully\n", queue_id);
 884
 885         kfree(q_data);
 886
 887         return ret;
 888 }
 889
 890 int pqm_get_queue_checkpoint_info(struct process_queue_manager *pqm,
 891                                   unsigned int qid,
 892                                   uint32_t *mqd_size,
 893                                   uint32_t *ctl_stack_size)
 894 {
 895         struct process_queue_node *pqn;
 896
 897         pqn = get_queue_by_qid(pqm, qid);
 898         if (!pqn) {
 899                 pr_debug("amdkfd: No queue %d exists for operation\n", qid);
 900                 return -EFAULT;
 901         }
 902
 903         if (!pqn->q->device->dqm->ops.get_queue_checkpoint_info) {
 904                 pr_err("amdkfd: queue dumping not supported on this device\n");
 905                 return -EOPNOTSUPP;
 906         }
 907
 908         pqn->q->device->dqm->ops.get_queue_checkpoint_info(pqn->q->device->dqm,
 909                                                        pqn->q, mqd_size,
 910                                                        ctl_stack_size);
 911         return 0;
 912 }
 913
 914 #if defined(CONFIG_DEBUG_FS)
 915
 916 int pqm_debugfs_mqds(struct seq_file *m, void *data)
 917 {
 918         struct process_queue_manager *pqm = data;
 919         struct process_queue_node *pqn;
 920         struct queue *q;
 921         enum KFD_MQD_TYPE mqd_type;
 922         struct mqd_manager *mqd_mgr;
 923         int r = 0;
 924
 925         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 926                 if (pqn->q) {
 927                         q = pqn->q;
 928                         switch (q->properties.type) {
 929                         case KFD_QUEUE_TYPE_SDMA:
 930                         case KFD_QUEUE_TYPE_SDMA_XGMI:
 931                                 seq_printf(m, "  SDMA queue on device %x\n",
 932                                            q->device->id);
 933                                 mqd_type = KFD_MQD_TYPE_SDMA;
 934                                 break;
 935                         case KFD_QUEUE_TYPE_COMPUTE:
 936                                 seq_printf(m, "  Compute queue on device %x\n",
 937                                            q->device->id);
 938                                 mqd_type = KFD_MQD_TYPE_CP;
 939                                 break;
 940                         default:
 941                                 seq_printf(m,
 942                                 "  Bad user queue type %d on device %x\n",
 943                                            q->properties.type, q->device->id);
 944                                 continue;
 945                         }
 946                         mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
 947                 } else if (pqn->kq) {
 948                         q = pqn->kq->queue;
 949                         mqd_mgr = pqn->kq->mqd_mgr;
 950                         switch (q->properties.type) {
 951                         case KFD_QUEUE_TYPE_DIQ:
 952                                 seq_printf(m, "  DIQ on device %x\n",
 953                                            pqn->kq->dev->id);
 954                                 break;
 955                         default:
 956                                 seq_printf(m,
 957                                 "  Bad kernel queue type %d on device %x\n",
 958                                            q->properties.type,
 959                                            pqn->kq->dev->id);
 960                                 continue;
 961                         }
 962                 } else {
 963                         seq_printf(m,
 964                 "  Weird: Queue node with neither kernel nor user queue\n");
 965                         continue;
 966                 }
 967
 968                 r = mqd_mgr->debugfs_show_mqd(m, q->mqd);
 969                 if (r != 0)
 970                         break;
 971         }
 972
 973         return r;
 974 }
 975
 976 #endif