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_node *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_node *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 (KFD_GC_VERSION(dev) != IP_VERSION(9, 4, 3) && !dev->kfd->shared_resources.enable_mes) {
 127                 if (gws)
 128                         ret = amdgpu_amdkfd_add_gws_to_process(pdd->process->kgd_process_info,
 129                                 gws, &mem);
 130                 else
 131                         ret = amdgpu_amdkfd_remove_gws_from_process(pdd->process->kgd_process_info,
 132                                 pqn->q->gws);
 133                 if (unlikely(ret))
 134                         return ret;
 135                 pqn->q->gws = mem;
 136         } else {
 137                 /*
 138                  * Intentionally set GWS to a non-NULL value
 139                  * for devices that do not use GWS for global wave
 140                  * synchronization but require the formality
 141                  * of setting GWS for cooperative groups.
 142                  */
 143                 pqn->q->gws = gws ? ERR_PTR(-ENOMEM) : NULL;
 144         }
 145
 146         pdd->qpd.num_gws = gws ? dev->adev->gds.gws_size : 0;
 147
 148         return pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 149                                                         pqn->q, NULL);
 150 }
 151
 152 void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
 153 {
 154         int i;
 155
 156         for (i = 0; i < p->n_pdds; i++)
 157                 kfd_process_dequeue_from_device(p->pdds[i]);
 158 }
 159
 160 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
 161 {
 162         INIT_LIST_HEAD(&pqm->queues);
 163         pqm->queue_slot_bitmap = bitmap_zalloc(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
 164                                                GFP_KERNEL);
 165         if (!pqm->queue_slot_bitmap)
 166                 return -ENOMEM;
 167         pqm->process = p;
 168
 169         return 0;
 170 }
 171
 172 void pqm_uninit(struct process_queue_manager *pqm)
 173 {
 174         struct process_queue_node *pqn, *next;
 175
 176         list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
 177                 if (pqn->q && pqn->q->gws &&
 178                     KFD_GC_VERSION(pqn->q->device) != IP_VERSION(9, 4, 3) &&
 179                     !pqn->q->device->kfd->shared_resources.enable_mes)
 180                         amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
 181                                 pqn->q->gws);
 182                 kfd_procfs_del_queue(pqn->q);
 183                 uninit_queue(pqn->q);
 184                 list_del(&pqn->process_queue_list);
 185                 kfree(pqn);
 186         }
 187
 188         bitmap_free(pqm->queue_slot_bitmap);
 189         pqm->queue_slot_bitmap = NULL;
 190 }
 191
 192 static int init_user_queue(struct process_queue_manager *pqm,
 193                                 struct kfd_node *dev, struct queue **q,
 194                                 struct queue_properties *q_properties,
 195                                 struct file *f, struct amdgpu_bo *wptr_bo,
 196                                 unsigned int qid)
 197 {
 198         int retval;
 199
 200         /* Doorbell initialized in user space*/
 201         q_properties->doorbell_ptr = NULL;
 202         q_properties->exception_status = KFD_EC_MASK(EC_QUEUE_NEW);
 203
 204         /* let DQM handle it*/
 205         q_properties->vmid = 0;
 206         q_properties->queue_id = qid;
 207
 208         retval = init_queue(q, q_properties);
 209         if (retval != 0)
 210                 return retval;
 211
 212         (*q)->device = dev;
 213         (*q)->process = pqm->process;
 214
 215         if (dev->kfd->shared_resources.enable_mes) {
 216                 retval = amdgpu_amdkfd_alloc_gtt_mem(dev->adev,
 217                                                 AMDGPU_MES_GANG_CTX_SIZE,
 218                                                 &(*q)->gang_ctx_bo,
 219                                                 &(*q)->gang_ctx_gpu_addr,
 220                                                 &(*q)->gang_ctx_cpu_ptr,
 221                                                 false);
 222                 if (retval) {
 223                         pr_err("failed to allocate gang context bo\n");
 224                         goto cleanup;
 225                 }
 226                 memset((*q)->gang_ctx_cpu_ptr, 0, AMDGPU_MES_GANG_CTX_SIZE);
 227                 (*q)->wptr_bo = wptr_bo;
 228         }
 229
 230         pr_debug("PQM After init queue");
 231         return 0;
 232
 233 cleanup:
 234         uninit_queue(*q);
 235         *q = NULL;
 236         return retval;
 237 }
 238
 239 int pqm_create_queue(struct process_queue_manager *pqm,
 240                             struct kfd_node *dev,
 241                             struct file *f,
 242                             struct queue_properties *properties,
 243                             unsigned int *qid,
 244                             struct amdgpu_bo *wptr_bo,
 245                             const struct kfd_criu_queue_priv_data *q_data,
 246                             const void *restore_mqd,
 247                             const void *restore_ctl_stack,
 248                             uint32_t *p_doorbell_offset_in_process)
 249 {
 250         int retval;
 251         struct kfd_process_device *pdd;
 252         struct queue *q;
 253         struct process_queue_node *pqn;
 254         struct kernel_queue *kq;
 255         enum kfd_queue_type type = properties->type;
 256         unsigned int max_queues = 127; /* HWS limit */
 257
 258         /*
 259          * On GFX 9.4.3, increase the number of queues that
 260          * can be created to 255. No HWS limit on GFX 9.4.3.
 261          */
 262         if (KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 3))
 263                 max_queues = 255;
 264
 265         q = NULL;
 266         kq = NULL;
 267
 268         pdd = kfd_get_process_device_data(dev, pqm->process);
 269         if (!pdd) {
 270                 pr_err("Process device data doesn't exist\n");
 271                 return -1;
 272         }
 273
 274         /*
 275          * for debug process, verify that it is within the static queues limit
 276          * currently limit is set to half of the total avail HQD slots
 277          * If we are just about to create DIQ, the is_debug flag is not set yet
 278          * Hence we also check the type as well
 279          */
 280         if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
 281                 max_queues = dev->kfd->device_info.max_no_of_hqd/2;
 282
 283         if (pdd->qpd.queue_count >= max_queues)
 284                 return -ENOSPC;
 285
 286         if (q_data) {
 287                 retval = assign_queue_slot_by_qid(pqm, q_data->q_id);
 288                 *qid = q_data->q_id;
 289         } else
 290                 retval = find_available_queue_slot(pqm, qid);
 291
 292         if (retval != 0)
 293                 return retval;
 294
 295         if (list_empty(&pdd->qpd.queues_list) &&
 296             list_empty(&pdd->qpd.priv_queue_list))
 297                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 298
 299         pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 300         if (!pqn) {
 301                 retval = -ENOMEM;
 302                 goto err_allocate_pqn;
 303         }
 304
 305         switch (type) {
 306         case KFD_QUEUE_TYPE_SDMA:
 307         case KFD_QUEUE_TYPE_SDMA_XGMI:
 308                 /* SDMA queues are always allocated statically no matter
 309                  * which scheduler mode is used. We also do not need to
 310                  * check whether a SDMA queue can be allocated here, because
 311                  * allocate_sdma_queue() in create_queue() has the
 312                  * corresponding check logic.
 313                  */
 314                 retval = init_user_queue(pqm, dev, &q, properties, f, wptr_bo, *qid);
 315                 if (retval != 0)
 316                         goto err_create_queue;
 317                 pqn->q = q;
 318                 pqn->kq = NULL;
 319                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
 320                                                     restore_mqd, restore_ctl_stack);
 321                 print_queue(q);
 322                 break;
 323
 324         case KFD_QUEUE_TYPE_COMPUTE:
 325                 /* check if there is over subscription */
 326                 if ((dev->dqm->sched_policy ==
 327                      KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 328                 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 329                 (dev->dqm->active_queue_count >= get_cp_queues_num(dev->dqm)))) {
 330                         pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
 331                         retval = -EPERM;
 332                         goto err_create_queue;
 333                 }
 334
 335                 retval = init_user_queue(pqm, dev, &q, properties, f, wptr_bo, *qid);
 336                 if (retval != 0)
 337                         goto err_create_queue;
 338                 pqn->q = q;
 339                 pqn->kq = NULL;
 340                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
 341                                                     restore_mqd, restore_ctl_stack);
 342                 print_queue(q);
 343                 break;
 344         case KFD_QUEUE_TYPE_DIQ:
 345                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 346                 if (!kq) {
 347                         retval = -ENOMEM;
 348                         goto err_create_queue;
 349                 }
 350                 kq->queue->properties.queue_id = *qid;
 351                 pqn->kq = kq;
 352                 pqn->q = NULL;
 353                 retval = kfd_process_drain_interrupts(pdd);
 354                 if (retval)
 355                         break;
 356
 357                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 358                                                         kq, &pdd->qpd);
 359                 break;
 360         default:
 361                 WARN(1, "Invalid queue type %d", type);
 362                 retval = -EINVAL;
 363         }
 364
 365         if (retval != 0) {
 366                 pr_err("Pasid 0x%x DQM create queue type %d failed. ret %d\n",
 367                         pqm->process->pasid, type, retval);
 368                 goto err_create_queue;
 369         }
 370
 371         if (q && p_doorbell_offset_in_process) {
 372                 /* Return the doorbell offset within the doorbell page
 373                  * to the caller so it can be passed up to user mode
 374                  * (in bytes).
 375                  * relative doorbell index = Absolute doorbell index -
 376                  * absolute index of first doorbell in the page.
 377                  */
 378                 uint32_t first_db_index = amdgpu_doorbell_index_on_bar(pdd->dev->adev,
 379                                                                        pdd->qpd.proc_doorbells,
 380                                                                        0,
 381                                                                        pdd->dev->kfd->device_info.doorbell_size);
 382
 383                 *p_doorbell_offset_in_process = (q->properties.doorbell_off
 384                                                 - first_db_index) * sizeof(uint32_t);
 385         }
 386
 387         pr_debug("PQM After DQM create queue\n");
 388
 389         list_add(&pqn->process_queue_list, &pqm->queues);
 390
 391         if (q) {
 392                 pr_debug("PQM done creating queue\n");
 393                 kfd_procfs_add_queue(q);
 394                 print_queue_properties(&q->properties);
 395         }
 396
 397         return retval;
 398
 399 err_create_queue:
 400         uninit_queue(q);
 401         if (kq)
 402                 kernel_queue_uninit(kq, false);
 403         kfree(pqn);
 404 err_allocate_pqn:
 405         /* check if queues list is empty unregister process from device */
 406         clear_bit(*qid, pqm->queue_slot_bitmap);
 407         if (list_empty(&pdd->qpd.queues_list) &&
 408             list_empty(&pdd->qpd.priv_queue_list))
 409                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 410         return retval;
 411 }
 412
 413 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 414 {
 415         struct process_queue_node *pqn;
 416         struct kfd_process_device *pdd;
 417         struct device_queue_manager *dqm;
 418         struct kfd_node *dev;
 419         int retval;
 420
 421         dqm = NULL;
 422
 423         retval = 0;
 424
 425         pqn = get_queue_by_qid(pqm, qid);
 426         if (!pqn) {
 427                 pr_err("Queue id does not match any known queue\n");
 428                 return -EINVAL;
 429         }
 430
 431         dev = NULL;
 432         if (pqn->kq)
 433                 dev = pqn->kq->dev;
 434         if (pqn->q)
 435                 dev = pqn->q->device;
 436         if (WARN_ON(!dev))
 437                 return -ENODEV;
 438
 439         pdd = kfd_get_process_device_data(dev, pqm->process);
 440         if (!pdd) {
 441                 pr_err("Process device data doesn't exist\n");
 442                 return -1;
 443         }
 444
 445         if (pqn->kq) {
 446                 /* destroy kernel queue (DIQ) */
 447                 dqm = pqn->kq->dev->dqm;
 448                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 449                 kernel_queue_uninit(pqn->kq, false);
 450         }
 451
 452         if (pqn->q) {
 453                 kfd_procfs_del_queue(pqn->q);
 454                 dqm = pqn->q->device->dqm;
 455                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 456                 if (retval) {
 457                         pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n",
 458                                 pqm->process->pasid,
 459                                 pqn->q->properties.queue_id, retval);
 460                         if (retval != -ETIME)
 461                                 goto err_destroy_queue;
 462                 }
 463
 464                 if (pqn->q->gws) {
 465                         if (KFD_GC_VERSION(pqn->q->device) != IP_VERSION(9, 4, 3) &&
 466                             !dev->kfd->shared_resources.enable_mes)
 467                                 amdgpu_amdkfd_remove_gws_from_process(
 468                                                 pqm->process->kgd_process_info,
 469                                                 pqn->q->gws);
 470                         pdd->qpd.num_gws = 0;
 471                 }
 472
 473                 if (dev->kfd->shared_resources.enable_mes) {
 474                         amdgpu_amdkfd_free_gtt_mem(dev->adev,
 475                                                    pqn->q->gang_ctx_bo);
 476                         if (pqn->q->wptr_bo)
 477                                 amdgpu_amdkfd_free_gtt_mem(dev->adev, pqn->q->wptr_bo);
 478
 479                 }
 480                 uninit_queue(pqn->q);
 481         }
 482
 483         list_del(&pqn->process_queue_list);
 484         kfree(pqn);
 485         clear_bit(qid, pqm->queue_slot_bitmap);
 486
 487         if (list_empty(&pdd->qpd.queues_list) &&
 488             list_empty(&pdd->qpd.priv_queue_list))
 489                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 490
 491 err_destroy_queue:
 492         return retval;
 493 }
 494
 495 int pqm_update_queue_properties(struct process_queue_manager *pqm,
 496                                 unsigned int qid, struct queue_properties *p)
 497 {
 498         int retval;
 499         struct process_queue_node *pqn;
 500
 501         pqn = get_queue_by_qid(pqm, qid);
 502         if (!pqn) {
 503                 pr_debug("No queue %d exists for update operation\n", qid);
 504                 return -EFAULT;
 505         }
 506
 507         pqn->q->properties.queue_address = p->queue_address;
 508         pqn->q->properties.queue_size = p->queue_size;
 509         pqn->q->properties.queue_percent = p->queue_percent;
 510         pqn->q->properties.priority = p->priority;
 511         pqn->q->properties.pm4_target_xcc = p->pm4_target_xcc;
 512
 513         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 514                                                         pqn->q, NULL);
 515         if (retval != 0)
 516                 return retval;
 517
 518         return 0;
 519 }
 520
 521 int pqm_update_mqd(struct process_queue_manager *pqm,
 522                                 unsigned int qid, struct mqd_update_info *minfo)
 523 {
 524         int retval;
 525         struct process_queue_node *pqn;
 526
 527         pqn = get_queue_by_qid(pqm, qid);
 528         if (!pqn) {
 529                 pr_debug("No queue %d exists for update operation\n", qid);
 530                 return -EFAULT;
 531         }
 532
 533         /* CUs are masked for debugger requirements so deny user mask  */
 534         if (pqn->q->properties.is_dbg_wa && minfo && minfo->cu_mask.ptr)
 535                 return -EBUSY;
 536
 537         /* ASICs that have WGPs must enforce pairwise enabled mask checks. */
 538         if (minfo && minfo->cu_mask.ptr &&
 539                         KFD_GC_VERSION(pqn->q->device) >= IP_VERSION(10, 0, 0)) {
 540                 int i;
 541
 542                 for (i = 0; i < minfo->cu_mask.count; i += 2) {
 543                         uint32_t cu_pair = (minfo->cu_mask.ptr[i / 32] >> (i % 32)) & 0x3;
 544
 545                         if (cu_pair && cu_pair != 0x3) {
 546                                 pr_debug("CUs must be adjacent pairwise enabled.\n");
 547                                 return -EINVAL;
 548                         }
 549                 }
 550         }
 551
 552         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 553                                                         pqn->q, minfo);
 554         if (retval != 0)
 555                 return retval;
 556
 557         if (minfo && minfo->cu_mask.ptr)
 558                 pqn->q->properties.is_user_cu_masked = true;
 559
 560         return 0;
 561 }
 562
 563 struct kernel_queue *pqm_get_kernel_queue(
 564                                         struct process_queue_manager *pqm,
 565                                         unsigned int qid)
 566 {
 567         struct process_queue_node *pqn;
 568
 569         pqn = get_queue_by_qid(pqm, qid);
 570         if (pqn && pqn->kq)
 571                 return pqn->kq;
 572
 573         return NULL;
 574 }
 575
 576 struct queue *pqm_get_user_queue(struct process_queue_manager *pqm,
 577                                         unsigned int qid)
 578 {
 579         struct process_queue_node *pqn;
 580
 581         pqn = get_queue_by_qid(pqm, qid);
 582         return pqn ? pqn->q : NULL;
 583 }
 584
 585 int pqm_get_wave_state(struct process_queue_manager *pqm,
 586                        unsigned int qid,
 587                        void __user *ctl_stack,
 588                        u32 *ctl_stack_used_size,
 589                        u32 *save_area_used_size)
 590 {
 591         struct process_queue_node *pqn;
 592
 593         pqn = get_queue_by_qid(pqm, qid);
 594         if (!pqn) {
 595                 pr_debug("amdkfd: No queue %d exists for operation\n",
 596                          qid);
 597                 return -EFAULT;
 598         }
 599
 600         return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
 601                                                        pqn->q,
 602                                                        ctl_stack,
 603                                                        ctl_stack_used_size,
 604                                                        save_area_used_size);
 605 }
 606
 607 int pqm_get_queue_snapshot(struct process_queue_manager *pqm,
 608                            uint64_t exception_clear_mask,
 609                            void __user *buf,
 610                            int *num_qss_entries,
 611                            uint32_t *entry_size)
 612 {
 613         struct process_queue_node *pqn;
 614         struct kfd_queue_snapshot_entry src;
 615         uint32_t tmp_entry_size = *entry_size, tmp_qss_entries = *num_qss_entries;
 616         int r = 0;
 617
 618         *num_qss_entries = 0;
 619         if (!(*entry_size))
 620                 return -EINVAL;
 621
 622         *entry_size = min_t(size_t, *entry_size, sizeof(struct kfd_queue_snapshot_entry));
 623         mutex_lock(&pqm->process->event_mutex);
 624
 625         memset(&src, 0, sizeof(src));
 626
 627         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 628                 if (!pqn->q)
 629                         continue;
 630
 631                 if (*num_qss_entries < tmp_qss_entries) {
 632                         set_queue_snapshot_entry(pqn->q, exception_clear_mask, &src);
 633
 634                         if (copy_to_user(buf, &src, *entry_size)) {
 635                                 r = -EFAULT;
 636                                 break;
 637                         }
 638                         buf += tmp_entry_size;
 639                 }
 640                 *num_qss_entries += 1;
 641         }
 642
 643         mutex_unlock(&pqm->process->event_mutex);
 644         return r;
 645 }
 646
 647 static int get_queue_data_sizes(struct kfd_process_device *pdd,
 648                                 struct queue *q,
 649                                 uint32_t *mqd_size,
 650                                 uint32_t *ctl_stack_size)
 651 {
 652         int ret;
 653
 654         ret = pqm_get_queue_checkpoint_info(&pdd->process->pqm,
 655                                             q->properties.queue_id,
 656                                             mqd_size,
 657                                             ctl_stack_size);
 658         if (ret)
 659                 pr_err("Failed to get queue dump info (%d)\n", ret);
 660
 661         return ret;
 662 }
 663
 664 int kfd_process_get_queue_info(struct kfd_process *p,
 665                                uint32_t *num_queues,
 666                                uint64_t *priv_data_sizes)
 667 {
 668         uint32_t extra_data_sizes = 0;
 669         struct queue *q;
 670         int i;
 671         int ret;
 672
 673         *num_queues = 0;
 674
 675         /* Run over all PDDs of the process */
 676         for (i = 0; i < p->n_pdds; i++) {
 677                 struct kfd_process_device *pdd = p->pdds[i];
 678
 679                 list_for_each_entry(q, &pdd->qpd.queues_list, list) {
 680                         if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
 681                                 q->properties.type == KFD_QUEUE_TYPE_SDMA ||
 682                                 q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
 683                                 uint32_t mqd_size, ctl_stack_size;
 684
 685                                 *num_queues = *num_queues + 1;
 686
 687                                 ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
 688                                 if (ret)
 689                                         return ret;
 690
 691                                 extra_data_sizes += mqd_size + ctl_stack_size;
 692                         } else {
 693                                 pr_err("Unsupported queue type (%d)\n", q->properties.type);
 694                                 return -EOPNOTSUPP;
 695                         }
 696                 }
 697         }
 698         *priv_data_sizes = extra_data_sizes +
 699                                 (*num_queues * sizeof(struct kfd_criu_queue_priv_data));
 700
 701         return 0;
 702 }
 703
 704 static int pqm_checkpoint_mqd(struct process_queue_manager *pqm,
 705                               unsigned int qid,
 706                               void *mqd,
 707                               void *ctl_stack)
 708 {
 709         struct process_queue_node *pqn;
 710
 711         pqn = get_queue_by_qid(pqm, qid);
 712         if (!pqn) {
 713                 pr_debug("amdkfd: No queue %d exists for operation\n", qid);
 714                 return -EFAULT;
 715         }
 716
 717         if (!pqn->q->device->dqm->ops.checkpoint_mqd) {
 718                 pr_err("amdkfd: queue dumping not supported on this device\n");
 719                 return -EOPNOTSUPP;
 720         }
 721
 722         return pqn->q->device->dqm->ops.checkpoint_mqd(pqn->q->device->dqm,
 723                                                        pqn->q, mqd, ctl_stack);
 724 }
 725
 726 static int criu_checkpoint_queue(struct kfd_process_device *pdd,
 727                            struct queue *q,
 728                            struct kfd_criu_queue_priv_data *q_data)
 729 {
 730         uint8_t *mqd, *ctl_stack;
 731         int ret;
 732
 733         mqd = (void *)(q_data + 1);
 734         ctl_stack = mqd + q_data->mqd_size;
 735
 736         q_data->gpu_id = pdd->user_gpu_id;
 737         q_data->type = q->properties.type;
 738         q_data->format = q->properties.format;
 739         q_data->q_id =  q->properties.queue_id;
 740         q_data->q_address = q->properties.queue_address;
 741         q_data->q_size = q->properties.queue_size;
 742         q_data->priority = q->properties.priority;
 743         q_data->q_percent = q->properties.queue_percent;
 744         q_data->read_ptr_addr = (uint64_t)q->properties.read_ptr;
 745         q_data->write_ptr_addr = (uint64_t)q->properties.write_ptr;
 746         q_data->doorbell_id = q->doorbell_id;
 747
 748         q_data->sdma_id = q->sdma_id;
 749
 750         q_data->eop_ring_buffer_address =
 751                 q->properties.eop_ring_buffer_address;
 752
 753         q_data->eop_ring_buffer_size = q->properties.eop_ring_buffer_size;
 754
 755         q_data->ctx_save_restore_area_address =
 756                 q->properties.ctx_save_restore_area_address;
 757
 758         q_data->ctx_save_restore_area_size =
 759                 q->properties.ctx_save_restore_area_size;
 760
 761         q_data->gws = !!q->gws;
 762
 763         ret = pqm_checkpoint_mqd(&pdd->process->pqm, q->properties.queue_id, mqd, ctl_stack);
 764         if (ret) {
 765                 pr_err("Failed checkpoint queue_mqd (%d)\n", ret);
 766                 return ret;
 767         }
 768
 769         pr_debug("Dumping Queue: gpu_id:%x queue_id:%u\n", q_data->gpu_id, q_data->q_id);
 770         return ret;
 771 }
 772
 773 static int criu_checkpoint_queues_device(struct kfd_process_device *pdd,
 774                                    uint8_t __user *user_priv,
 775                                    unsigned int *q_index,
 776                                    uint64_t *queues_priv_data_offset)
 777 {
 778         unsigned int q_private_data_size = 0;
 779         uint8_t *q_private_data = NULL; /* Local buffer to store individual queue private data */
 780         struct queue *q;
 781         int ret = 0;
 782
 783         list_for_each_entry(q, &pdd->qpd.queues_list, list) {
 784                 struct kfd_criu_queue_priv_data *q_data;
 785                 uint64_t q_data_size;
 786                 uint32_t mqd_size;
 787                 uint32_t ctl_stack_size;
 788
 789                 if (q->properties.type != KFD_QUEUE_TYPE_COMPUTE &&
 790                         q->properties.type != KFD_QUEUE_TYPE_SDMA &&
 791                         q->properties.type != KFD_QUEUE_TYPE_SDMA_XGMI) {
 792
 793                         pr_err("Unsupported queue type (%d)\n", q->properties.type);
 794                         ret = -EOPNOTSUPP;
 795                         break;
 796                 }
 797
 798                 ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
 799                 if (ret)
 800                         break;
 801
 802                 q_data_size = sizeof(*q_data) + mqd_size + ctl_stack_size;
 803
 804                 /* Increase local buffer space if needed */
 805                 if (q_private_data_size < q_data_size) {
 806                         kfree(q_private_data);
 807
 808                         q_private_data = kzalloc(q_data_size, GFP_KERNEL);
 809                         if (!q_private_data) {
 810                                 ret = -ENOMEM;
 811                                 break;
 812                         }
 813                         q_private_data_size = q_data_size;
 814                 }
 815
 816                 q_data = (struct kfd_criu_queue_priv_data *)q_private_data;
 817
 818                 /* data stored in this order: priv_data, mqd, ctl_stack */
 819                 q_data->mqd_size = mqd_size;
 820                 q_data->ctl_stack_size = ctl_stack_size;
 821
 822                 ret = criu_checkpoint_queue(pdd, q, q_data);
 823                 if (ret)
 824                         break;
 825
 826                 q_data->object_type = KFD_CRIU_OBJECT_TYPE_QUEUE;
 827
 828                 ret = copy_to_user(user_priv + *queues_priv_data_offset,
 829                                 q_data, q_data_size);
 830                 if (ret) {
 831                         ret = -EFAULT;
 832                         break;
 833                 }
 834                 *queues_priv_data_offset += q_data_size;
 835                 *q_index = *q_index + 1;
 836         }
 837
 838         kfree(q_private_data);
 839
 840         return ret;
 841 }
 842
 843 int kfd_criu_checkpoint_queues(struct kfd_process *p,
 844                          uint8_t __user *user_priv_data,
 845                          uint64_t *priv_data_offset)
 846 {
 847         int ret = 0, pdd_index, q_index = 0;
 848
 849         for (pdd_index = 0; pdd_index < p->n_pdds; pdd_index++) {
 850                 struct kfd_process_device *pdd = p->pdds[pdd_index];
 851
 852                 /*
 853                  * criu_checkpoint_queues_device will copy data to user and update q_index and
 854                  * queues_priv_data_offset
 855                  */
 856                 ret = criu_checkpoint_queues_device(pdd, user_priv_data, &q_index,
 857                                               priv_data_offset);
 858
 859                 if (ret)
 860                         break;
 861         }
 862
 863         return ret;
 864 }
 865
 866 static void set_queue_properties_from_criu(struct queue_properties *qp,
 867                                           struct kfd_criu_queue_priv_data *q_data)
 868 {
 869         qp->is_interop = false;
 870         qp->queue_percent = q_data->q_percent;
 871         qp->priority = q_data->priority;
 872         qp->queue_address = q_data->q_address;
 873         qp->queue_size = q_data->q_size;
 874         qp->read_ptr = (uint32_t *) q_data->read_ptr_addr;
 875         qp->write_ptr = (uint32_t *) q_data->write_ptr_addr;
 876         qp->eop_ring_buffer_address = q_data->eop_ring_buffer_address;
 877         qp->eop_ring_buffer_size = q_data->eop_ring_buffer_size;
 878         qp->ctx_save_restore_area_address = q_data->ctx_save_restore_area_address;
 879         qp->ctx_save_restore_area_size = q_data->ctx_save_restore_area_size;
 880         qp->ctl_stack_size = q_data->ctl_stack_size;
 881         qp->type = q_data->type;
 882         qp->format = q_data->format;
 883 }
 884
 885 int kfd_criu_restore_queue(struct kfd_process *p,
 886                            uint8_t __user *user_priv_ptr,
 887                            uint64_t *priv_data_offset,
 888                            uint64_t max_priv_data_size)
 889 {
 890         uint8_t *mqd, *ctl_stack, *q_extra_data = NULL;
 891         struct kfd_criu_queue_priv_data *q_data;
 892         struct kfd_process_device *pdd;
 893         uint64_t q_extra_data_size;
 894         struct queue_properties qp;
 895         unsigned int queue_id;
 896         int ret = 0;
 897
 898         if (*priv_data_offset + sizeof(*q_data) > max_priv_data_size)
 899                 return -EINVAL;
 900
 901         q_data = kmalloc(sizeof(*q_data), GFP_KERNEL);
 902         if (!q_data)
 903                 return -ENOMEM;
 904
 905         ret = copy_from_user(q_data, user_priv_ptr + *priv_data_offset, sizeof(*q_data));
 906         if (ret) {
 907                 ret = -EFAULT;
 908                 goto exit;
 909         }
 910
 911         *priv_data_offset += sizeof(*q_data);
 912         q_extra_data_size = (uint64_t)q_data->ctl_stack_size + q_data->mqd_size;
 913
 914         if (*priv_data_offset + q_extra_data_size > max_priv_data_size) {
 915                 ret = -EINVAL;
 916                 goto exit;
 917         }
 918
 919         q_extra_data = kmalloc(q_extra_data_size, GFP_KERNEL);
 920         if (!q_extra_data) {
 921                 ret = -ENOMEM;
 922                 goto exit;
 923         }
 924
 925         ret = copy_from_user(q_extra_data, user_priv_ptr + *priv_data_offset, q_extra_data_size);
 926         if (ret) {
 927                 ret = -EFAULT;
 928                 goto exit;
 929         }
 930
 931         *priv_data_offset += q_extra_data_size;
 932
 933         pdd = kfd_process_device_data_by_id(p, q_data->gpu_id);
 934         if (!pdd) {
 935                 pr_err("Failed to get pdd\n");
 936                 ret = -EINVAL;
 937                 goto exit;
 938         }
 939
 940         /* data stored in this order: mqd, ctl_stack */
 941         mqd = q_extra_data;
 942         ctl_stack = mqd + q_data->mqd_size;
 943
 944         memset(&qp, 0, sizeof(qp));
 945         set_queue_properties_from_criu(&qp, q_data);
 946
 947         print_queue_properties(&qp);
 948
 949         ret = pqm_create_queue(&p->pqm, pdd->dev, NULL, &qp, &queue_id, NULL, q_data, mqd, ctl_stack,
 950                                 NULL);
 951         if (ret) {
 952                 pr_err("Failed to create new queue err:%d\n", ret);
 953                 goto exit;
 954         }
 955
 956         if (q_data->gws)
 957                 ret = pqm_set_gws(&p->pqm, q_data->q_id, pdd->dev->gws);
 958
 959 exit:
 960         if (ret)
 961                 pr_err("Failed to restore queue (%d)\n", ret);
 962         else
 963                 pr_debug("Queue id %d was restored successfully\n", queue_id);
 964
 965         kfree(q_data);
 966
 967         return ret;
 968 }
 969
 970 int pqm_get_queue_checkpoint_info(struct process_queue_manager *pqm,
 971                                   unsigned int qid,
 972                                   uint32_t *mqd_size,
 973                                   uint32_t *ctl_stack_size)
 974 {
 975         struct process_queue_node *pqn;
 976
 977         pqn = get_queue_by_qid(pqm, qid);
 978         if (!pqn) {
 979                 pr_debug("amdkfd: No queue %d exists for operation\n", qid);
 980                 return -EFAULT;
 981         }
 982
 983         if (!pqn->q->device->dqm->ops.get_queue_checkpoint_info) {
 984                 pr_err("amdkfd: queue dumping not supported on this device\n");
 985                 return -EOPNOTSUPP;
 986         }
 987
 988         pqn->q->device->dqm->ops.get_queue_checkpoint_info(pqn->q->device->dqm,
 989                                                        pqn->q, mqd_size,
 990                                                        ctl_stack_size);
 991         return 0;
 992 }
 993
 994 #if defined(CONFIG_DEBUG_FS)
 995
 996 int pqm_debugfs_mqds(struct seq_file *m, void *data)
 997 {
 998         struct process_queue_manager *pqm = data;
 999         struct process_queue_node *pqn;
1000         struct queue *q;
1001         enum KFD_MQD_TYPE mqd_type;
1002         struct mqd_manager *mqd_mgr;
1003         int r = 0, xcc, num_xccs = 1;
1004         void *mqd;
1005         uint64_t size = 0;
1006
1007         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
1008                 if (pqn->q) {
1009                         q = pqn->q;
1010                         switch (q->properties.type) {
1011                         case KFD_QUEUE_TYPE_SDMA:
1012                         case KFD_QUEUE_TYPE_SDMA_XGMI:
1013                                 seq_printf(m, "  SDMA queue on device %x\n",
1014                                            q->device->id);
1015                                 mqd_type = KFD_MQD_TYPE_SDMA;
1016                                 break;
1017                         case KFD_QUEUE_TYPE_COMPUTE:
1018                                 seq_printf(m, "  Compute queue on device %x\n",
1019                                            q->device->id);
1020                                 mqd_type = KFD_MQD_TYPE_CP;
1021                                 num_xccs = NUM_XCC(q->device->xcc_mask);
1022                                 break;
1023                         default:
1024                                 seq_printf(m,
1025                                 "  Bad user queue type %d on device %x\n",
1026                                            q->properties.type, q->device->id);
1027                                 continue;
1028                         }
1029                         mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
1030                         size = mqd_mgr->mqd_stride(mqd_mgr,
1031                                                         &q->properties);
1032                 } else if (pqn->kq) {
1033                         q = pqn->kq->queue;
1034                         mqd_mgr = pqn->kq->mqd_mgr;
1035                         switch (q->properties.type) {
1036                         case KFD_QUEUE_TYPE_DIQ:
1037                                 seq_printf(m, "  DIQ on device %x\n",
1038                                            pqn->kq->dev->id);
1039                                 break;
1040                         default:
1041                                 seq_printf(m,
1042                                 "  Bad kernel queue type %d on device %x\n",
1043                                            q->properties.type,
1044                                            pqn->kq->dev->id);
1045                                 continue;
1046                         }
1047                 } else {
1048                         seq_printf(m,
1049                 "  Weird: Queue node with neither kernel nor user queue\n");
1050                         continue;
1051                 }
1052
1053                 for (xcc = 0; xcc < num_xccs; xcc++) {
1054                         mqd = q->mqd + size * xcc;
1055                         r = mqd_mgr->debugfs_show_mqd(m, mqd);
1056                         if (r != 0)
1057                                 break;
1058                 }
1059         }
1060
1061         return r;
1062 }
1063
1064 #endif