drivers/gpu/drm/amd/amdkfd/kfd_packet_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/mutex.h>
  26 #include "kfd_device_queue_manager.h"
  27 #include "kfd_kernel_queue.h"
  28 #include "kfd_priv.h"
  29 #include "kfd_pm4_headers_vi.h"
  30 #include "kfd_pm4_opcodes.h"
  31
  32 static inline void inc_wptr(unsigned int *wptr, unsigned int increment_bytes,
  33                                 unsigned int buffer_size_bytes)
  34 {
  35         unsigned int temp = *wptr + increment_bytes / sizeof(uint32_t);
  36
  37         WARN((temp * sizeof(uint32_t)) > buffer_size_bytes,
  38              "Runlist IB overflow");
  39         *wptr = temp;
  40 }
  41
  42 static unsigned int build_pm4_header(unsigned int opcode, size_t packet_size)
  43 {
  44         union PM4_MES_TYPE_3_HEADER header;
  45
  46         header.u32All = 0;
  47         header.opcode = opcode;
  48         header.count = packet_size / 4 - 2;
  49         header.type = PM4_TYPE_3;
  50
  51         return header.u32All;
  52 }
  53
  54 static void pm_calc_rlib_size(struct packet_manager *pm,
  55                                 unsigned int *rlib_size,
  56                                 bool *over_subscription)
  57 {
  58         unsigned int process_count, queue_count, compute_queue_count;
  59         unsigned int map_queue_size;
  60         unsigned int max_proc_per_quantum = 1;
  61         struct kfd_dev *dev = pm->dqm->dev;
  62
  63         process_count = pm->dqm->processes_count;
  64         queue_count = pm->dqm->queue_count;
  65         compute_queue_count = queue_count - pm->dqm->sdma_queue_count;
  66
  67         /* check if there is over subscription
  68          * Note: the arbitration between the number of VMIDs and
  69          * hws_max_conc_proc has been done in
  70          * kgd2kfd_device_init().
  71          */
  72         *over_subscription = false;
  73
  74         if (dev->max_proc_per_quantum > 1)
  75                 max_proc_per_quantum = dev->max_proc_per_quantum;
  76
  77         if ((process_count > max_proc_per_quantum) ||
  78             compute_queue_count > get_queues_num(pm->dqm)) {
  79                 *over_subscription = true;
  80                 pr_debug("Over subscribed runlist\n");
  81         }
  82
  83         map_queue_size = sizeof(struct pm4_mes_map_queues);
  84         /* calculate run list ib allocation size */
  85         *rlib_size = process_count * sizeof(struct pm4_mes_map_process) +
  86                      queue_count * map_queue_size;
  87
  88         /*
  89          * Increase the allocation size in case we need a chained run list
  90          * when over subscription
  91          */
  92         if (*over_subscription)
  93                 *rlib_size += sizeof(struct pm4_mes_runlist);
  94
  95         pr_debug("runlist ib size %d\n", *rlib_size);
  96 }
  97
  98 static int pm_allocate_runlist_ib(struct packet_manager *pm,
  99                                 unsigned int **rl_buffer,
 100                                 uint64_t *rl_gpu_buffer,
 101                                 unsigned int *rl_buffer_size,
 102                                 bool *is_over_subscription)
 103 {
 104         int retval;
 105
 106         if (WARN_ON(pm->allocated))
 107                 return -EINVAL;
 108
 109         pm_calc_rlib_size(pm, rl_buffer_size, is_over_subscription);
 110
 111         retval = kfd_gtt_sa_allocate(pm->dqm->dev, *rl_buffer_size,
 112                                         &pm->ib_buffer_obj);
 113
 114         if (retval) {
 115                 pr_err("Failed to allocate runlist IB\n");
 116                 return retval;
 117         }
 118
 119         *(void **)rl_buffer = pm->ib_buffer_obj->cpu_ptr;
 120         *rl_gpu_buffer = pm->ib_buffer_obj->gpu_addr;
 121
 122         memset(*rl_buffer, 0, *rl_buffer_size);
 123         pm->allocated = true;
 124         return retval;
 125 }
 126
 127 static int pm_create_runlist(struct packet_manager *pm, uint32_t *buffer,
 128                         uint64_t ib, size_t ib_size_in_dwords, bool chain)
 129 {
 130         struct pm4_mes_runlist *packet;
 131         int concurrent_proc_cnt = 0;
 132         struct kfd_dev *kfd = pm->dqm->dev;
 133
 134         if (WARN_ON(!ib))
 135                 return -EFAULT;
 136
 137         /* Determine the number of processes to map together to HW:
 138          * it can not exceed the number of VMIDs available to the
 139          * scheduler, and it is determined by the smaller of the number
 140          * of processes in the runlist and kfd module parameter
 141          * hws_max_conc_proc.
 142          * Note: the arbitration between the number of VMIDs and
 143          * hws_max_conc_proc has been done in
 144          * kgd2kfd_device_init().
 145          */
 146         concurrent_proc_cnt = min(pm->dqm->processes_count,
 147                         kfd->max_proc_per_quantum);
 148
 149         packet = (struct pm4_mes_runlist *)buffer;
 150
 151         memset(buffer, 0, sizeof(struct pm4_mes_runlist));
 152         packet->header.u32All = build_pm4_header(IT_RUN_LIST,
 153                                                 sizeof(struct pm4_mes_runlist));
 154
 155         packet->bitfields4.ib_size = ib_size_in_dwords;
 156         packet->bitfields4.chain = chain ? 1 : 0;
 157         packet->bitfields4.offload_polling = 0;
 158         packet->bitfields4.valid = 1;
 159         packet->bitfields4.process_cnt = concurrent_proc_cnt;
 160         packet->ordinal2 = lower_32_bits(ib);
 161         packet->bitfields3.ib_base_hi = upper_32_bits(ib);
 162
 163         return 0;
 164 }
 165
 166 static int pm_create_map_process(struct packet_manager *pm, uint32_t *buffer,
 167                                 struct qcm_process_device *qpd)
 168 {
 169         struct pm4_mes_map_process *packet;
 170
 171         packet = (struct pm4_mes_map_process *)buffer;
 172
 173         memset(buffer, 0, sizeof(struct pm4_mes_map_process));
 174
 175         packet->header.u32All = build_pm4_header(IT_MAP_PROCESS,
 176                                         sizeof(struct pm4_mes_map_process));
 177         packet->bitfields2.diq_enable = (qpd->is_debug) ? 1 : 0;
 178         packet->bitfields2.process_quantum = 1;
 179         packet->bitfields2.pasid = qpd->pqm->process->pasid;
 180         packet->bitfields3.page_table_base = qpd->page_table_base;
 181         packet->bitfields10.gds_size = qpd->gds_size;
 182         packet->bitfields10.num_gws = qpd->num_gws;
 183         packet->bitfields10.num_oac = qpd->num_oac;
 184         packet->bitfields10.num_queues = (qpd->is_debug) ? 0 : qpd->queue_count;
 185
 186         packet->sh_mem_config = qpd->sh_mem_config;
 187         packet->sh_mem_bases = qpd->sh_mem_bases;
 188         packet->sh_mem_ape1_base = qpd->sh_mem_ape1_base;
 189         packet->sh_mem_ape1_limit = qpd->sh_mem_ape1_limit;
 190
 191         /* TODO: scratch support */
 192         packet->sh_hidden_private_base_vmid = 0;
 193
 194         packet->gds_addr_lo = lower_32_bits(qpd->gds_context_area);
 195         packet->gds_addr_hi = upper_32_bits(qpd->gds_context_area);
 196
 197         return 0;
 198 }
 199
 200 static int pm_create_map_queue(struct packet_manager *pm, uint32_t *buffer,
 201                 struct queue *q, bool is_static)
 202 {
 203         struct pm4_mes_map_queues *packet;
 204         bool use_static = is_static;
 205
 206         packet = (struct pm4_mes_map_queues *)buffer;
 207         memset(buffer, 0, sizeof(struct pm4_mes_map_queues));
 208
 209         packet->header.u32All = build_pm4_header(IT_MAP_QUEUES,
 210                                                 sizeof(struct pm4_mes_map_queues));
 211         packet->bitfields2.alloc_format =
 212                 alloc_format__mes_map_queues__one_per_pipe_vi;
 213         packet->bitfields2.num_queues = 1;
 214         packet->bitfields2.queue_sel =
 215                 queue_sel__mes_map_queues__map_to_hws_determined_queue_slots_vi;
 216
 217         packet->bitfields2.engine_sel =
 218                 engine_sel__mes_map_queues__compute_vi;
 219         packet->bitfields2.queue_type =
 220                 queue_type__mes_map_queues__normal_compute_vi;
 221
 222         switch (q->properties.type) {
 223         case KFD_QUEUE_TYPE_COMPUTE:
 224                 if (use_static)
 225                         packet->bitfields2.queue_type =
 226                 queue_type__mes_map_queues__normal_latency_static_queue_vi;
 227                 break;
 228         case KFD_QUEUE_TYPE_DIQ:
 229                 packet->bitfields2.queue_type =
 230                         queue_type__mes_map_queues__debug_interface_queue_vi;
 231                 break;
 232         case KFD_QUEUE_TYPE_SDMA:
 233                 packet->bitfields2.engine_sel = q->properties.sdma_engine_id +
 234                                 engine_sel__mes_map_queues__sdma0_vi;
 235                 use_static = false; /* no static queues under SDMA */
 236                 break;
 237         default:
 238                 WARN(1, "queue type %d", q->properties.type);
 239                 return -EINVAL;
 240         }
 241         packet->bitfields3.doorbell_offset =
 242                         q->properties.doorbell_off;
 243
 244         packet->mqd_addr_lo =
 245                         lower_32_bits(q->gart_mqd_addr);
 246
 247         packet->mqd_addr_hi =
 248                         upper_32_bits(q->gart_mqd_addr);
 249
 250         packet->wptr_addr_lo =
 251                         lower_32_bits((uint64_t)q->properties.write_ptr);
 252
 253         packet->wptr_addr_hi =
 254                         upper_32_bits((uint64_t)q->properties.write_ptr);
 255
 256         return 0;
 257 }
 258
 259 static int pm_create_runlist_ib(struct packet_manager *pm,
 260                                 struct list_head *queues,
 261                                 uint64_t *rl_gpu_addr,
 262                                 size_t *rl_size_bytes)
 263 {
 264         unsigned int alloc_size_bytes;
 265         unsigned int *rl_buffer, rl_wptr, i;
 266         int retval, proccesses_mapped;
 267         struct device_process_node *cur;
 268         struct qcm_process_device *qpd;
 269         struct queue *q;
 270         struct kernel_queue *kq;
 271         bool is_over_subscription;
 272
 273         rl_wptr = retval = proccesses_mapped = 0;
 274
 275         retval = pm_allocate_runlist_ib(pm, &rl_buffer, rl_gpu_addr,
 276                                 &alloc_size_bytes, &is_over_subscription);
 277         if (retval)
 278                 return retval;
 279
 280         *rl_size_bytes = alloc_size_bytes;
 281         pm->ib_size_bytes = alloc_size_bytes;
 282
 283         pr_debug("Building runlist ib process count: %d queues count %d\n",
 284                 pm->dqm->processes_count, pm->dqm->queue_count);
 285
 286         /* build the run list ib packet */
 287         list_for_each_entry(cur, queues, list) {
 288                 qpd = cur->qpd;
 289                 /* build map process packet */
 290                 if (proccesses_mapped >= pm->dqm->processes_count) {
 291                         pr_debug("Not enough space left in runlist IB\n");
 292                         pm_release_ib(pm);
 293                         return -ENOMEM;
 294                 }
 295
 296                 retval = pm_create_map_process(pm, &rl_buffer[rl_wptr], qpd);
 297                 if (retval)
 298                         return retval;
 299
 300                 proccesses_mapped++;
 301                 inc_wptr(&rl_wptr, sizeof(struct pm4_mes_map_process),
 302                                 alloc_size_bytes);
 303
 304                 list_for_each_entry(kq, &qpd->priv_queue_list, list) {
 305                         if (!kq->queue->properties.is_active)
 306                                 continue;
 307
 308                         pr_debug("static_queue, mapping kernel q %d, is debug status %d\n",
 309                                 kq->queue->queue, qpd->is_debug);
 310
 311                         retval = pm_create_map_queue(pm,
 312                                                 &rl_buffer[rl_wptr],
 313                                                 kq->queue,
 314                                                 qpd->is_debug);
 315                         if (retval)
 316                                 return retval;
 317
 318                         inc_wptr(&rl_wptr,
 319                                 sizeof(struct pm4_mes_map_queues),
 320                                 alloc_size_bytes);
 321                 }
 322
 323                 list_for_each_entry(q, &qpd->queues_list, list) {
 324                         if (!q->properties.is_active)
 325                                 continue;
 326
 327                         pr_debug("static_queue, mapping user queue %d, is debug status %d\n",
 328                                 q->queue, qpd->is_debug);
 329
 330                         retval = pm_create_map_queue(pm,
 331                                                 &rl_buffer[rl_wptr],
 332                                                 q,
 333                                                 qpd->is_debug);
 334
 335                         if (retval)
 336                                 return retval;
 337
 338                         inc_wptr(&rl_wptr,
 339                                 sizeof(struct pm4_mes_map_queues),
 340                                 alloc_size_bytes);
 341                 }
 342         }
 343
 344         pr_debug("Finished map process and queues to runlist\n");
 345
 346         if (is_over_subscription)
 347                 retval = pm_create_runlist(pm, &rl_buffer[rl_wptr],
 348                                         *rl_gpu_addr,
 349                                         alloc_size_bytes / sizeof(uint32_t),
 350                                         true);
 351
 352         for (i = 0; i < alloc_size_bytes / sizeof(uint32_t); i++)
 353                 pr_debug("0x%2X ", rl_buffer[i]);
 354         pr_debug("\n");
 355
 356         return retval;
 357 }
 358
 359 int pm_init(struct packet_manager *pm, struct device_queue_manager *dqm)
 360 {
 361         pm->dqm = dqm;
 362         mutex_init(&pm->lock);
 363         pm->priv_queue = kernel_queue_init(dqm->dev, KFD_QUEUE_TYPE_HIQ);
 364         if (!pm->priv_queue) {
 365                 mutex_destroy(&pm->lock);
 366                 return -ENOMEM;
 367         }
 368         pm->allocated = false;
 369
 370         return 0;
 371 }
 372
 373 void pm_uninit(struct packet_manager *pm)
 374 {
 375         mutex_destroy(&pm->lock);
 376         kernel_queue_uninit(pm->priv_queue);
 377 }
 378
 379 int pm_send_set_resources(struct packet_manager *pm,
 380                                 struct scheduling_resources *res)
 381 {
 382         struct pm4_mes_set_resources *packet;
 383         int retval = 0;
 384
 385         mutex_lock(&pm->lock);
 386         pm->priv_queue->ops.acquire_packet_buffer(pm->priv_queue,
 387                                         sizeof(*packet) / sizeof(uint32_t),
 388                                         (unsigned int **)&packet);
 389         if (!packet) {
 390                 pr_err("Failed to allocate buffer on kernel queue\n");
 391                 retval = -ENOMEM;
 392                 goto out;
 393         }
 394
 395         memset(packet, 0, sizeof(struct pm4_mes_set_resources));
 396         packet->header.u32All = build_pm4_header(IT_SET_RESOURCES,
 397                                         sizeof(struct pm4_mes_set_resources));
 398
 399         packet->bitfields2.queue_type =
 400                         queue_type__mes_set_resources__hsa_interface_queue_hiq;
 401         packet->bitfields2.vmid_mask = res->vmid_mask;
 402         packet->bitfields2.unmap_latency = KFD_UNMAP_LATENCY_MS / 100;
 403         packet->bitfields7.oac_mask = res->oac_mask;
 404         packet->bitfields8.gds_heap_base = res->gds_heap_base;
 405         packet->bitfields8.gds_heap_size = res->gds_heap_size;
 406
 407         packet->gws_mask_lo = lower_32_bits(res->gws_mask);
 408         packet->gws_mask_hi = upper_32_bits(res->gws_mask);
 409
 410         packet->queue_mask_lo = lower_32_bits(res->queue_mask);
 411         packet->queue_mask_hi = upper_32_bits(res->queue_mask);
 412
 413         pm->priv_queue->ops.submit_packet(pm->priv_queue);
 414
 415 out:
 416         mutex_unlock(&pm->lock);
 417
 418         return retval;
 419 }
 420
 421 int pm_send_runlist(struct packet_manager *pm, struct list_head *dqm_queues)
 422 {
 423         uint64_t rl_gpu_ib_addr;
 424         uint32_t *rl_buffer;
 425         size_t rl_ib_size, packet_size_dwords;
 426         int retval;
 427
 428         retval = pm_create_runlist_ib(pm, dqm_queues, &rl_gpu_ib_addr,
 429                                         &rl_ib_size);
 430         if (retval)
 431                 goto fail_create_runlist_ib;
 432
 433         pr_debug("runlist IB address: 0x%llX\n", rl_gpu_ib_addr);
 434
 435         packet_size_dwords = sizeof(struct pm4_mes_runlist) / sizeof(uint32_t);
 436         mutex_lock(&pm->lock);
 437
 438         retval = pm->priv_queue->ops.acquire_packet_buffer(pm->priv_queue,
 439                                         packet_size_dwords, &rl_buffer);
 440         if (retval)
 441                 goto fail_acquire_packet_buffer;
 442
 443         retval = pm_create_runlist(pm, rl_buffer, rl_gpu_ib_addr,
 444                                         rl_ib_size / sizeof(uint32_t), false);
 445         if (retval)
 446                 goto fail_create_runlist;
 447
 448         pm->priv_queue->ops.submit_packet(pm->priv_queue);
 449
 450         mutex_unlock(&pm->lock);
 451
 452         return retval;
 453
 454 fail_create_runlist:
 455         pm->priv_queue->ops.rollback_packet(pm->priv_queue);
 456 fail_acquire_packet_buffer:
 457         mutex_unlock(&pm->lock);
 458 fail_create_runlist_ib:
 459         pm_release_ib(pm);
 460         return retval;
 461 }
 462
 463 int pm_send_query_status(struct packet_manager *pm, uint64_t fence_address,
 464                         uint32_t fence_value)
 465 {
 466         int retval;
 467         struct pm4_mes_query_status *packet;
 468
 469         if (WARN_ON(!fence_address))
 470                 return -EFAULT;
 471
 472         mutex_lock(&pm->lock);
 473         retval = pm->priv_queue->ops.acquire_packet_buffer(
 474                         pm->priv_queue,
 475                         sizeof(struct pm4_mes_query_status) / sizeof(uint32_t),
 476                         (unsigned int **)&packet);
 477         if (retval)
 478                 goto fail_acquire_packet_buffer;
 479
 480         packet->header.u32All = build_pm4_header(IT_QUERY_STATUS,
 481                                         sizeof(struct pm4_mes_query_status));
 482
 483         packet->bitfields2.context_id = 0;
 484         packet->bitfields2.interrupt_sel =
 485                         interrupt_sel__mes_query_status__completion_status;
 486         packet->bitfields2.command =
 487                         command__mes_query_status__fence_only_after_write_ack;
 488
 489         packet->addr_hi = upper_32_bits((uint64_t)fence_address);
 490         packet->addr_lo = lower_32_bits((uint64_t)fence_address);
 491         packet->data_hi = upper_32_bits((uint64_t)fence_value);
 492         packet->data_lo = lower_32_bits((uint64_t)fence_value);
 493
 494         pm->priv_queue->ops.submit_packet(pm->priv_queue);
 495
 496 fail_acquire_packet_buffer:
 497         mutex_unlock(&pm->lock);
 498         return retval;
 499 }
 500
 501 int pm_send_unmap_queue(struct packet_manager *pm, enum kfd_queue_type type,
 502                         enum kfd_unmap_queues_filter filter,
 503                         uint32_t filter_param, bool reset,
 504                         unsigned int sdma_engine)
 505 {
 506         int retval;
 507         uint32_t *buffer;
 508         struct pm4_mes_unmap_queues *packet;
 509
 510         mutex_lock(&pm->lock);
 511         retval = pm->priv_queue->ops.acquire_packet_buffer(
 512                         pm->priv_queue,
 513                         sizeof(struct pm4_mes_unmap_queues) / sizeof(uint32_t),
 514                         &buffer);
 515         if (retval)
 516                 goto err_acquire_packet_buffer;
 517
 518         packet = (struct pm4_mes_unmap_queues *)buffer;
 519         memset(buffer, 0, sizeof(struct pm4_mes_unmap_queues));
 520         pr_debug("static_queue: unmapping queues: filter is %d , reset is %d , type is %d\n",
 521                 filter, reset, type);
 522         packet->header.u32All = build_pm4_header(IT_UNMAP_QUEUES,
 523                                         sizeof(struct pm4_mes_unmap_queues));
 524         switch (type) {
 525         case KFD_QUEUE_TYPE_COMPUTE:
 526         case KFD_QUEUE_TYPE_DIQ:
 527                 packet->bitfields2.engine_sel =
 528                         engine_sel__mes_unmap_queues__compute;
 529                 break;
 530         case KFD_QUEUE_TYPE_SDMA:
 531                 packet->bitfields2.engine_sel =
 532                         engine_sel__mes_unmap_queues__sdma0 + sdma_engine;
 533                 break;
 534         default:
 535                 WARN(1, "queue type %d", type);
 536                 retval = -EINVAL;
 537                 goto err_invalid;
 538         }
 539
 540         if (reset)
 541                 packet->bitfields2.action =
 542                                 action__mes_unmap_queues__reset_queues;
 543         else
 544                 packet->bitfields2.action =
 545                                 action__mes_unmap_queues__preempt_queues;
 546
 547         switch (filter) {
 548         case KFD_UNMAP_QUEUES_FILTER_SINGLE_QUEUE:
 549                 packet->bitfields2.queue_sel =
 550                                 queue_sel__mes_unmap_queues__perform_request_on_specified_queues;
 551                 packet->bitfields2.num_queues = 1;
 552                 packet->bitfields3b.doorbell_offset0 = filter_param;
 553                 break;
 554         case KFD_UNMAP_QUEUES_FILTER_BY_PASID:
 555                 packet->bitfields2.queue_sel =
 556                                 queue_sel__mes_unmap_queues__perform_request_on_pasid_queues;
 557                 packet->bitfields3a.pasid = filter_param;
 558                 break;
 559         case KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES:
 560                 packet->bitfields2.queue_sel =
 561                                 queue_sel__mes_unmap_queues__unmap_all_queues;
 562                 break;
 563         case KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES:
 564                 /* in this case, we do not preempt static queues */
 565                 packet->bitfields2.queue_sel =
 566                                 queue_sel__mes_unmap_queues__unmap_all_non_static_queues;
 567                 break;
 568         default:
 569                 WARN(1, "filter %d", filter);
 570                 retval = -EINVAL;
 571                 goto err_invalid;
 572         }
 573
 574         pm->priv_queue->ops.submit_packet(pm->priv_queue);
 575
 576         mutex_unlock(&pm->lock);
 577         return 0;
 578
 579 err_invalid:
 580         pm->priv_queue->ops.rollback_packet(pm->priv_queue);
 581 err_acquire_packet_buffer:
 582         mutex_unlock(&pm->lock);
 583         return retval;
 584 }
 585
 586 void pm_release_ib(struct packet_manager *pm)
 587 {
 588         mutex_lock(&pm->lock);
 589         if (pm->allocated) {
 590                 kfd_gtt_sa_free(pm->dqm->dev, pm->ib_buffer_obj);
 591                 pm->allocated = false;
 592         }
 593         mutex_unlock(&pm->lock);
 594 }
 595
 596 #if defined(CONFIG_DEBUG_FS)
 597
 598 int pm_debugfs_runlist(struct seq_file *m, void *data)
 599 {
 600         struct packet_manager *pm = data;
 601
 602         mutex_lock(&pm->lock);
 603
 604         if (!pm->allocated) {
 605                 seq_puts(m, "  No active runlist\n");
 606                 goto out;
 607         }
 608
 609         seq_hex_dump(m, "  ", DUMP_PREFIX_OFFSET, 32, 4,
 610                      pm->ib_buffer_obj->cpu_ptr, pm->ib_size_bytes, false);
 611
 612 out:
 613         mutex_unlock(&pm->lock);
 614         return 0;
 615 }
 616
 617 #endif