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

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23
  24 #include <linux/slab.h>
  25 #include <linux/list.h>
  26 #include <linux/types.h>
  27 #include <linux/printk.h>
  28 #include <linux/bitops.h>
  29 #include <linux/sched.h>
  30 #include "kfd_priv.h"
  31 #include "kfd_device_queue_manager.h"
  32 #include "kfd_mqd_manager.h"
  33 #include "cik_regs.h"
  34 #include "kfd_kernel_queue.h"
  35
  36 /* Size of the per-pipe EOP queue */
  37 #define CIK_HPD_EOP_BYTES_LOG2 11
  38 #define CIK_HPD_EOP_BYTES (1U << CIK_HPD_EOP_BYTES_LOG2)
  39
  40 static int set_pasid_vmid_mapping(struct device_queue_manager *dqm,
  41                                         unsigned int pasid, unsigned int vmid);
  42
  43 static int create_compute_queue_nocpsch(struct device_queue_manager *dqm,
  44                                         struct queue *q,
  45                                         struct qcm_process_device *qpd);
  46
  47 static int execute_queues_cpsch(struct device_queue_manager *dqm, bool lock);
  48 static int destroy_queues_cpsch(struct device_queue_manager *dqm, bool lock);
  49
  50 static int create_sdma_queue_nocpsch(struct device_queue_manager *dqm,
  51                                         struct queue *q,
  52                                         struct qcm_process_device *qpd);
  53
  54 static void deallocate_sdma_queue(struct device_queue_manager *dqm,
  55                                 unsigned int sdma_queue_id);
  56
  57 static inline
  58 enum KFD_MQD_TYPE get_mqd_type_from_queue_type(enum kfd_queue_type type)
  59 {
  60         if (type == KFD_QUEUE_TYPE_SDMA)
  61                 return KFD_MQD_TYPE_SDMA;
  62         return KFD_MQD_TYPE_CP;
  63 }
  64
  65 static inline unsigned int get_first_pipe(struct device_queue_manager *dqm)
  66 {
  67         BUG_ON(!dqm);
  68         return dqm->dev->shared_resources.first_compute_pipe;
  69 }
  70
  71 static inline unsigned int get_pipes_num_cpsch(void)
  72 {
  73         return PIPE_PER_ME_CP_SCHEDULING;
  74 }
  75
  76 void program_sh_mem_settings(struct device_queue_manager *dqm,
  77                                         struct qcm_process_device *qpd)
  78 {
  79         return kfd2kgd->program_sh_mem_settings(dqm->dev->kgd, qpd->vmid,
  80                                                 qpd->sh_mem_config,
  81                                                 qpd->sh_mem_ape1_base,
  82                                                 qpd->sh_mem_ape1_limit,
  83                                                 qpd->sh_mem_bases);
  84 }
  85
  86 static int allocate_vmid(struct device_queue_manager *dqm,
  87                         struct qcm_process_device *qpd,
  88                         struct queue *q)
  89 {
  90         int bit, allocated_vmid;
  91
  92         if (dqm->vmid_bitmap == 0)
  93                 return -ENOMEM;
  94
  95         bit = find_first_bit((unsigned long *)&dqm->vmid_bitmap, CIK_VMID_NUM);
  96         clear_bit(bit, (unsigned long *)&dqm->vmid_bitmap);
  97
  98         /* Kaveri kfd vmid's starts from vmid 8 */
  99         allocated_vmid = bit + KFD_VMID_START_OFFSET;
 100         pr_debug("kfd: vmid allocation %d\n", allocated_vmid);
 101         qpd->vmid = allocated_vmid;
 102         q->properties.vmid = allocated_vmid;
 103
 104         set_pasid_vmid_mapping(dqm, q->process->pasid, q->properties.vmid);
 105         program_sh_mem_settings(dqm, qpd);
 106
 107         return 0;
 108 }
 109
 110 static void deallocate_vmid(struct device_queue_manager *dqm,
 111                                 struct qcm_process_device *qpd,
 112                                 struct queue *q)
 113 {
 114         int bit = qpd->vmid - KFD_VMID_START_OFFSET;
 115
 116         /* Release the vmid mapping */
 117         set_pasid_vmid_mapping(dqm, 0, qpd->vmid);
 118
 119         set_bit(bit, (unsigned long *)&dqm->vmid_bitmap);
 120         qpd->vmid = 0;
 121         q->properties.vmid = 0;
 122 }
 123
 124 static int create_queue_nocpsch(struct device_queue_manager *dqm,
 125                                 struct queue *q,
 126                                 struct qcm_process_device *qpd,
 127                                 int *allocated_vmid)
 128 {
 129         int retval;
 130
 131         BUG_ON(!dqm || !q || !qpd || !allocated_vmid);
 132
 133         pr_debug("kfd: In func %s\n", __func__);
 134         print_queue(q);
 135
 136         mutex_lock(&dqm->lock);
 137
 138         if (dqm->total_queue_count >= max_num_of_queues_per_device) {
 139                 pr_warn("amdkfd: Can't create new usermode queue because %d queues were already created\n",
 140                                 dqm->total_queue_count);
 141                 mutex_unlock(&dqm->lock);
 142                 return -EPERM;
 143         }
 144
 145         if (list_empty(&qpd->queues_list)) {
 146                 retval = allocate_vmid(dqm, qpd, q);
 147                 if (retval != 0) {
 148                         mutex_unlock(&dqm->lock);
 149                         return retval;
 150                 }
 151         }
 152         *allocated_vmid = qpd->vmid;
 153         q->properties.vmid = qpd->vmid;
 154
 155         if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE)
 156                 retval = create_compute_queue_nocpsch(dqm, q, qpd);
 157         if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
 158                 retval = create_sdma_queue_nocpsch(dqm, q, qpd);
 159
 160         if (retval != 0) {
 161                 if (list_empty(&qpd->queues_list)) {
 162                         deallocate_vmid(dqm, qpd, q);
 163                         *allocated_vmid = 0;
 164                 }
 165                 mutex_unlock(&dqm->lock);
 166                 return retval;
 167         }
 168
 169         list_add(&q->list, &qpd->queues_list);
 170         if (q->properties.is_active)
 171                 dqm->queue_count++;
 172
 173         if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
 174                 dqm->sdma_queue_count++;
 175
 176         /*
 177          * Unconditionally increment this counter, regardless of the queue's
 178          * type or whether the queue is active.
 179          */
 180         dqm->total_queue_count++;
 181         pr_debug("Total of %d queues are accountable so far\n",
 182                         dqm->total_queue_count);
 183
 184         mutex_unlock(&dqm->lock);
 185         return 0;
 186 }
 187
 188 static int allocate_hqd(struct device_queue_manager *dqm, struct queue *q)
 189 {
 190         bool set;
 191         int pipe, bit, i;
 192
 193         set = false;
 194
 195         for (pipe = dqm->next_pipe_to_allocate, i = 0; i < get_pipes_num(dqm);
 196                         pipe = ((pipe + 1) % get_pipes_num(dqm)), ++i) {
 197                 if (dqm->allocated_queues[pipe] != 0) {
 198                         bit = find_first_bit(
 199                                 (unsigned long *)&dqm->allocated_queues[pipe],
 200                                 QUEUES_PER_PIPE);
 201
 202                         clear_bit(bit,
 203                                 (unsigned long *)&dqm->allocated_queues[pipe]);
 204                         q->pipe = pipe;
 205                         q->queue = bit;
 206                         set = true;
 207                         break;
 208                 }
 209         }
 210
 211         if (set == false)
 212                 return -EBUSY;
 213
 214         pr_debug("kfd: DQM %s hqd slot - pipe (%d) queue(%d)\n",
 215                                 __func__, q->pipe, q->queue);
 216         /* horizontal hqd allocation */
 217         dqm->next_pipe_to_allocate = (pipe + 1) % get_pipes_num(dqm);
 218
 219         return 0;
 220 }
 221
 222 static inline void deallocate_hqd(struct device_queue_manager *dqm,
 223                                 struct queue *q)
 224 {
 225         set_bit(q->queue, (unsigned long *)&dqm->allocated_queues[q->pipe]);
 226 }
 227
 228 static int create_compute_queue_nocpsch(struct device_queue_manager *dqm,
 229                                         struct queue *q,
 230                                         struct qcm_process_device *qpd)
 231 {
 232         int retval;
 233         struct mqd_manager *mqd;
 234
 235         BUG_ON(!dqm || !q || !qpd);
 236
 237         mqd = dqm->ops.get_mqd_manager(dqm, KFD_MQD_TYPE_COMPUTE);
 238         if (mqd == NULL)
 239                 return -ENOMEM;
 240
 241         retval = allocate_hqd(dqm, q);
 242         if (retval != 0)
 243                 return retval;
 244
 245         retval = mqd->init_mqd(mqd, &q->mqd, &q->mqd_mem_obj,
 246                                 &q->gart_mqd_addr, &q->properties);
 247         if (retval != 0) {
 248                 deallocate_hqd(dqm, q);
 249                 return retval;
 250         }
 251
 252         pr_debug("kfd: loading mqd to hqd on pipe (%d) queue (%d)\n",
 253                         q->pipe,
 254                         q->queue);
 255
 256         retval = mqd->load_mqd(mqd, q->mqd, q->pipe,
 257                         q->queue, (uint32_t __user *) q->properties.write_ptr);
 258         if (retval != 0) {
 259                 deallocate_hqd(dqm, q);
 260                 mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
 261                 return retval;
 262         }
 263
 264         return 0;
 265 }
 266
 267 static int destroy_queue_nocpsch(struct device_queue_manager *dqm,
 268                                 struct qcm_process_device *qpd,
 269                                 struct queue *q)
 270 {
 271         int retval;
 272         struct mqd_manager *mqd;
 273
 274         BUG_ON(!dqm || !q || !q->mqd || !qpd);
 275
 276         retval = 0;
 277
 278         pr_debug("kfd: In Func %s\n", __func__);
 279
 280         mutex_lock(&dqm->lock);
 281
 282         if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE) {
 283                 mqd = dqm->ops.get_mqd_manager(dqm, KFD_MQD_TYPE_COMPUTE);
 284                 if (mqd == NULL) {
 285                         retval = -ENOMEM;
 286                         goto out;
 287                 }
 288                 deallocate_hqd(dqm, q);
 289         } else if (q->properties.type == KFD_QUEUE_TYPE_SDMA) {
 290                 mqd = dqm->ops.get_mqd_manager(dqm, KFD_MQD_TYPE_SDMA);
 291                 if (mqd == NULL) {
 292                         retval = -ENOMEM;
 293                         goto out;
 294                 }
 295                 dqm->sdma_queue_count--;
 296                 deallocate_sdma_queue(dqm, q->sdma_id);
 297         } else {
 298                 pr_debug("q->properties.type is invalid (%d)\n",
 299                                 q->properties.type);
 300                 retval = -EINVAL;
 301                 goto out;
 302         }
 303
 304         retval = mqd->destroy_mqd(mqd, q->mqd,
 305                                 KFD_PREEMPT_TYPE_WAVEFRONT_RESET,
 306                                 QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS,
 307                                 q->pipe, q->queue);
 308
 309         if (retval != 0)
 310                 goto out;
 311
 312         mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
 313
 314         list_del(&q->list);
 315         if (list_empty(&qpd->queues_list))
 316                 deallocate_vmid(dqm, qpd, q);
 317         if (q->properties.is_active)
 318                 dqm->queue_count--;
 319
 320         /*
 321          * Unconditionally decrement this counter, regardless of the queue's
 322          * type
 323          */
 324         dqm->total_queue_count--;
 325         pr_debug("Total of %d queues are accountable so far\n",
 326                         dqm->total_queue_count);
 327
 328 out:
 329         mutex_unlock(&dqm->lock);
 330         return retval;
 331 }
 332
 333 static int update_queue(struct device_queue_manager *dqm, struct queue *q)
 334 {
 335         int retval;
 336         struct mqd_manager *mqd;
 337         bool prev_active = false;
 338
 339         BUG_ON(!dqm || !q || !q->mqd);
 340
 341         mutex_lock(&dqm->lock);
 342         mqd = dqm->ops.get_mqd_manager(dqm,
 343                         get_mqd_type_from_queue_type(q->properties.type));
 344         if (mqd == NULL) {
 345                 mutex_unlock(&dqm->lock);
 346                 return -ENOMEM;
 347         }
 348
 349         if (q->properties.is_active == true)
 350                 prev_active = true;
 351
 352         /*
 353          *
 354          * check active state vs. the previous state
 355          * and modify counter accordingly
 356          */
 357         retval = mqd->update_mqd(mqd, q->mqd, &q->properties);
 358         if ((q->properties.is_active == true) && (prev_active == false))
 359                 dqm->queue_count++;
 360         else if ((q->properties.is_active == false) && (prev_active == true))
 361                 dqm->queue_count--;
 362
 363         if (sched_policy != KFD_SCHED_POLICY_NO_HWS)
 364                 retval = execute_queues_cpsch(dqm, false);
 365
 366         mutex_unlock(&dqm->lock);
 367         return retval;
 368 }
 369
 370 static struct mqd_manager *get_mqd_manager_nocpsch(
 371                 struct device_queue_manager *dqm, enum KFD_MQD_TYPE type)
 372 {
 373         struct mqd_manager *mqd;
 374
 375         BUG_ON(!dqm || type >= KFD_MQD_TYPE_MAX);
 376
 377         pr_debug("kfd: In func %s mqd type %d\n", __func__, type);
 378
 379         mqd = dqm->mqds[type];
 380         if (!mqd) {
 381                 mqd = mqd_manager_init(type, dqm->dev);
 382                 if (mqd == NULL)
 383                         pr_err("kfd: mqd manager is NULL");
 384                 dqm->mqds[type] = mqd;
 385         }
 386
 387         return mqd;
 388 }
 389
 390 static int register_process_nocpsch(struct device_queue_manager *dqm,
 391                                         struct qcm_process_device *qpd)
 392 {
 393         struct device_process_node *n;
 394         int retval;
 395
 396         BUG_ON(!dqm || !qpd);
 397
 398         pr_debug("kfd: In func %s\n", __func__);
 399
 400         n = kzalloc(sizeof(struct device_process_node), GFP_KERNEL);
 401         if (!n)
 402                 return -ENOMEM;
 403
 404         n->qpd = qpd;
 405
 406         mutex_lock(&dqm->lock);
 407         list_add(&n->list, &dqm->queues);
 408
 409         retval = dqm->ops_asic_specific.register_process(dqm, qpd);
 410
 411         dqm->processes_count++;
 412
 413         mutex_unlock(&dqm->lock);
 414
 415         return retval;
 416 }
 417
 418 static int unregister_process_nocpsch(struct device_queue_manager *dqm,
 419                                         struct qcm_process_device *qpd)
 420 {
 421         int retval;
 422         struct device_process_node *cur, *next;
 423
 424         BUG_ON(!dqm || !qpd);
 425
 426         BUG_ON(!list_empty(&qpd->queues_list));
 427
 428         pr_debug("kfd: In func %s\n", __func__);
 429
 430         retval = 0;
 431         mutex_lock(&dqm->lock);
 432
 433         list_for_each_entry_safe(cur, next, &dqm->queues, list) {
 434                 if (qpd == cur->qpd) {
 435                         list_del(&cur->list);
 436                         kfree(cur);
 437                         dqm->processes_count--;
 438                         goto out;
 439                 }
 440         }
 441         /* qpd not found in dqm list */
 442         retval = 1;
 443 out:
 444         mutex_unlock(&dqm->lock);
 445         return retval;
 446 }
 447
 448 static int
 449 set_pasid_vmid_mapping(struct device_queue_manager *dqm, unsigned int pasid,
 450                         unsigned int vmid)
 451 {
 452         uint32_t pasid_mapping;
 453
 454         pasid_mapping = (pasid == 0) ? 0 : (uint32_t)pasid |
 455                                                 ATC_VMID_PASID_MAPPING_VALID;
 456         return kfd2kgd->set_pasid_vmid_mapping(dqm->dev->kgd, pasid_mapping,
 457                                                 vmid);
 458 }
 459
 460 int init_pipelines(struct device_queue_manager *dqm,
 461                         unsigned int pipes_num, unsigned int first_pipe)
 462 {
 463         void *hpdptr;
 464         struct mqd_manager *mqd;
 465         unsigned int i, err, inx;
 466         uint64_t pipe_hpd_addr;
 467
 468         BUG_ON(!dqm || !dqm->dev);
 469
 470         pr_debug("kfd: In func %s\n", __func__);
 471
 472         /*
 473          * Allocate memory for the HPDs. This is hardware-owned per-pipe data.
 474          * The driver never accesses this memory after zeroing it.
 475          * It doesn't even have to be saved/restored on suspend/resume
 476          * because it contains no data when there are no active queues.
 477          */
 478
 479         err = kfd_gtt_sa_allocate(dqm->dev, CIK_HPD_EOP_BYTES * pipes_num,
 480                                         &dqm->pipeline_mem);
 481
 482         if (err) {
 483                 pr_err("kfd: error allocate vidmem num pipes: %d\n",
 484                         pipes_num);
 485                 return -ENOMEM;
 486         }
 487
 488         hpdptr = dqm->pipeline_mem->cpu_ptr;
 489         dqm->pipelines_addr = dqm->pipeline_mem->gpu_addr;
 490
 491         memset(hpdptr, 0, CIK_HPD_EOP_BYTES * pipes_num);
 492
 493         mqd = dqm->ops.get_mqd_manager(dqm, KFD_MQD_TYPE_COMPUTE);
 494         if (mqd == NULL) {
 495                 kfd_gtt_sa_free(dqm->dev, dqm->pipeline_mem);
 496                 return -ENOMEM;
 497         }
 498
 499         for (i = 0; i < pipes_num; i++) {
 500                 inx = i + first_pipe;
 501                 /*
 502                  * HPD buffer on GTT is allocated by amdkfd, no need to waste
 503                  * space in GTT for pipelines we don't initialize
 504                  */
 505                 pipe_hpd_addr = dqm->pipelines_addr + i * CIK_HPD_EOP_BYTES;
 506                 pr_debug("kfd: pipeline address %llX\n", pipe_hpd_addr);
 507                 /* = log2(bytes/4)-1 */
 508                 kfd2kgd->init_pipeline(dqm->dev->kgd, inx,
 509                                 CIK_HPD_EOP_BYTES_LOG2 - 3, pipe_hpd_addr);
 510         }
 511
 512         return 0;
 513 }
 514
 515 static int init_scheduler(struct device_queue_manager *dqm)
 516 {
 517         int retval;
 518
 519         BUG_ON(!dqm);
 520
 521         pr_debug("kfd: In %s\n", __func__);
 522
 523         retval = init_pipelines(dqm, get_pipes_num(dqm), get_first_pipe(dqm));
 524         return retval;
 525 }
 526
 527 static int initialize_nocpsch(struct device_queue_manager *dqm)
 528 {
 529         int i;
 530
 531         BUG_ON(!dqm);
 532
 533         pr_debug("kfd: In func %s num of pipes: %d\n",
 534                         __func__, get_pipes_num(dqm));
 535
 536         mutex_init(&dqm->lock);
 537         INIT_LIST_HEAD(&dqm->queues);
 538         dqm->queue_count = dqm->next_pipe_to_allocate = 0;
 539         dqm->sdma_queue_count = 0;
 540         dqm->allocated_queues = kcalloc(get_pipes_num(dqm),
 541                                         sizeof(unsigned int), GFP_KERNEL);
 542         if (!dqm->allocated_queues) {
 543                 mutex_destroy(&dqm->lock);
 544                 return -ENOMEM;
 545         }
 546
 547         for (i = 0; i < get_pipes_num(dqm); i++)
 548                 dqm->allocated_queues[i] = (1 << QUEUES_PER_PIPE) - 1;
 549
 550         dqm->vmid_bitmap = (1 << VMID_PER_DEVICE) - 1;
 551         dqm->sdma_bitmap = (1 << CIK_SDMA_QUEUES) - 1;
 552
 553         init_scheduler(dqm);
 554         return 0;
 555 }
 556
 557 static void uninitialize_nocpsch(struct device_queue_manager *dqm)
 558 {
 559         int i;
 560
 561         BUG_ON(!dqm);
 562
 563         BUG_ON(dqm->queue_count > 0 || dqm->processes_count > 0);
 564
 565         kfree(dqm->allocated_queues);
 566         for (i = 0 ; i < KFD_MQD_TYPE_MAX ; i++)
 567                 kfree(dqm->mqds[i]);
 568         mutex_destroy(&dqm->lock);
 569         kfd_gtt_sa_free(dqm->dev, dqm->pipeline_mem);
 570 }
 571
 572 static int start_nocpsch(struct device_queue_manager *dqm)
 573 {
 574         return 0;
 575 }
 576
 577 static int stop_nocpsch(struct device_queue_manager *dqm)
 578 {
 579         return 0;
 580 }
 581
 582 static int allocate_sdma_queue(struct device_queue_manager *dqm,
 583                                 unsigned int *sdma_queue_id)
 584 {
 585         int bit;
 586
 587         if (dqm->sdma_bitmap == 0)
 588                 return -ENOMEM;
 589
 590         bit = find_first_bit((unsigned long *)&dqm->sdma_bitmap,
 591                                 CIK_SDMA_QUEUES);
 592
 593         clear_bit(bit, (unsigned long *)&dqm->sdma_bitmap);
 594         *sdma_queue_id = bit;
 595
 596         return 0;
 597 }
 598
 599 static void deallocate_sdma_queue(struct device_queue_manager *dqm,
 600                                 unsigned int sdma_queue_id)
 601 {
 602         if (sdma_queue_id >= CIK_SDMA_QUEUES)
 603                 return;
 604         set_bit(sdma_queue_id, (unsigned long *)&dqm->sdma_bitmap);
 605 }
 606
 607 static void init_sdma_vm(struct device_queue_manager *dqm, struct queue *q,
 608                                 struct qcm_process_device *qpd)
 609 {
 610         uint32_t value = SDMA_ATC;
 611
 612         if (q->process->is_32bit_user_mode)
 613                 value |= SDMA_VA_PTR32 | get_sh_mem_bases_32(qpd_to_pdd(qpd));
 614         else
 615                 value |= SDMA_VA_SHARED_BASE(get_sh_mem_bases_nybble_64(
 616                                                         qpd_to_pdd(qpd)));
 617         q->properties.sdma_vm_addr = value;
 618 }
 619
 620 static int create_sdma_queue_nocpsch(struct device_queue_manager *dqm,
 621                                         struct queue *q,
 622                                         struct qcm_process_device *qpd)
 623 {
 624         struct mqd_manager *mqd;
 625         int retval;
 626
 627         mqd = dqm->ops.get_mqd_manager(dqm, KFD_MQD_TYPE_SDMA);
 628         if (!mqd)
 629                 return -ENOMEM;
 630
 631         retval = allocate_sdma_queue(dqm, &q->sdma_id);
 632         if (retval != 0)
 633                 return retval;
 634
 635         q->properties.sdma_queue_id = q->sdma_id % CIK_SDMA_QUEUES_PER_ENGINE;
 636         q->properties.sdma_engine_id = q->sdma_id / CIK_SDMA_ENGINE_NUM;
 637
 638         pr_debug("kfd: sdma id is:    %d\n", q->sdma_id);
 639         pr_debug("     sdma queue id: %d\n", q->properties.sdma_queue_id);
 640         pr_debug("     sdma engine id: %d\n", q->properties.sdma_engine_id);
 641
 642         retval = mqd->init_mqd(mqd, &q->mqd, &q->mqd_mem_obj,
 643                                 &q->gart_mqd_addr, &q->properties);
 644         if (retval != 0) {
 645                 deallocate_sdma_queue(dqm, q->sdma_id);
 646                 return retval;
 647         }
 648
 649         init_sdma_vm(dqm, q, qpd);
 650         return 0;
 651 }
 652
 653 /*
 654  * Device Queue Manager implementation for cp scheduler
 655  */
 656
 657 static int set_sched_resources(struct device_queue_manager *dqm)
 658 {
 659         struct scheduling_resources res;
 660         unsigned int queue_num, queue_mask;
 661
 662         BUG_ON(!dqm);
 663
 664         pr_debug("kfd: In func %s\n", __func__);
 665
 666         queue_num = get_pipes_num_cpsch() * QUEUES_PER_PIPE;
 667         queue_mask = (1 << queue_num) - 1;
 668         res.vmid_mask = (1 << VMID_PER_DEVICE) - 1;
 669         res.vmid_mask <<= KFD_VMID_START_OFFSET;
 670         res.queue_mask = queue_mask << (get_first_pipe(dqm) * QUEUES_PER_PIPE);
 671         res.gws_mask = res.oac_mask = res.gds_heap_base =
 672                                                 res.gds_heap_size = 0;
 673
 674         pr_debug("kfd: scheduling resources:\n"
 675                         "      vmid mask: 0x%8X\n"
 676                         "      queue mask: 0x%8llX\n",
 677                         res.vmid_mask, res.queue_mask);
 678
 679         return pm_send_set_resources(&dqm->packets, &res);
 680 }
 681
 682 static int initialize_cpsch(struct device_queue_manager *dqm)
 683 {
 684         int retval;
 685
 686         BUG_ON(!dqm);
 687
 688         pr_debug("kfd: In func %s num of pipes: %d\n",
 689                         __func__, get_pipes_num_cpsch());
 690
 691         mutex_init(&dqm->lock);
 692         INIT_LIST_HEAD(&dqm->queues);
 693         dqm->queue_count = dqm->processes_count = 0;
 694         dqm->sdma_queue_count = 0;
 695         dqm->active_runlist = false;
 696         retval = dqm->ops_asic_specific.initialize(dqm);
 697         if (retval != 0)
 698                 goto fail_init_pipelines;
 699
 700         return 0;
 701
 702 fail_init_pipelines:
 703         mutex_destroy(&dqm->lock);
 704         return retval;
 705 }
 706
 707 static int start_cpsch(struct device_queue_manager *dqm)
 708 {
 709         struct device_process_node *node;
 710         int retval;
 711
 712         BUG_ON(!dqm);
 713
 714         retval = 0;
 715
 716         retval = pm_init(&dqm->packets, dqm);
 717         if (retval != 0)
 718                 goto fail_packet_manager_init;
 719
 720         retval = set_sched_resources(dqm);
 721         if (retval != 0)
 722                 goto fail_set_sched_resources;
 723
 724         pr_debug("kfd: allocating fence memory\n");
 725
 726         /* allocate fence memory on the gart */
 727         retval = kfd_gtt_sa_allocate(dqm->dev, sizeof(*dqm->fence_addr),
 728                                         &dqm->fence_mem);
 729
 730         if (retval != 0)
 731                 goto fail_allocate_vidmem;
 732
 733         dqm->fence_addr = dqm->fence_mem->cpu_ptr;
 734         dqm->fence_gpu_addr = dqm->fence_mem->gpu_addr;
 735         list_for_each_entry(node, &dqm->queues, list)
 736                 if (node->qpd->pqm->process && dqm->dev)
 737                         kfd_bind_process_to_device(dqm->dev,
 738                                                 node->qpd->pqm->process);
 739
 740         execute_queues_cpsch(dqm, true);
 741
 742         return 0;
 743 fail_allocate_vidmem:
 744 fail_set_sched_resources:
 745         pm_uninit(&dqm->packets);
 746 fail_packet_manager_init:
 747         return retval;
 748 }
 749
 750 static int stop_cpsch(struct device_queue_manager *dqm)
 751 {
 752         struct device_process_node *node;
 753         struct kfd_process_device *pdd;
 754
 755         BUG_ON(!dqm);
 756
 757         destroy_queues_cpsch(dqm, true);
 758
 759         list_for_each_entry(node, &dqm->queues, list) {
 760                 pdd = qpd_to_pdd(node->qpd);
 761                 pdd->bound = false;
 762         }
 763         kfd_gtt_sa_free(dqm->dev, dqm->fence_mem);
 764         pm_uninit(&dqm->packets);
 765
 766         return 0;
 767 }
 768
 769 static int create_kernel_queue_cpsch(struct device_queue_manager *dqm,
 770                                         struct kernel_queue *kq,
 771                                         struct qcm_process_device *qpd)
 772 {
 773         BUG_ON(!dqm || !kq || !qpd);
 774
 775         pr_debug("kfd: In func %s\n", __func__);
 776
 777         mutex_lock(&dqm->lock);
 778         if (dqm->total_queue_count >= max_num_of_queues_per_device) {
 779                 pr_warn("amdkfd: Can't create new kernel queue because %d queues were already created\n",
 780                                 dqm->total_queue_count);
 781                 mutex_unlock(&dqm->lock);
 782                 return -EPERM;
 783         }
 784
 785         /*
 786          * Unconditionally increment this counter, regardless of the queue's
 787          * type or whether the queue is active.
 788          */
 789         dqm->total_queue_count++;
 790         pr_debug("Total of %d queues are accountable so far\n",
 791                         dqm->total_queue_count);
 792
 793         list_add(&kq->list, &qpd->priv_queue_list);
 794         dqm->queue_count++;
 795         qpd->is_debug = true;
 796         execute_queues_cpsch(dqm, false);
 797         mutex_unlock(&dqm->lock);
 798
 799         return 0;
 800 }
 801
 802 static void destroy_kernel_queue_cpsch(struct device_queue_manager *dqm,
 803                                         struct kernel_queue *kq,
 804                                         struct qcm_process_device *qpd)
 805 {
 806         BUG_ON(!dqm || !kq);
 807
 808         pr_debug("kfd: In %s\n", __func__);
 809
 810         mutex_lock(&dqm->lock);
 811         destroy_queues_cpsch(dqm, false);
 812         list_del(&kq->list);
 813         dqm->queue_count--;
 814         qpd->is_debug = false;
 815         execute_queues_cpsch(dqm, false);
 816         /*
 817          * Unconditionally decrement this counter, regardless of the queue's
 818          * type.
 819          */
 820         dqm->total_queue_count--;
 821         pr_debug("Total of %d queues are accountable so far\n",
 822                         dqm->total_queue_count);
 823         mutex_unlock(&dqm->lock);
 824 }
 825
 826 static void select_sdma_engine_id(struct queue *q)
 827 {
 828         static int sdma_id;
 829
 830         q->sdma_id = sdma_id;
 831         sdma_id = (sdma_id + 1) % 2;
 832 }
 833
 834 static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q,
 835                         struct qcm_process_device *qpd, int *allocate_vmid)
 836 {
 837         int retval;
 838         struct mqd_manager *mqd;
 839
 840         BUG_ON(!dqm || !q || !qpd);
 841
 842         retval = 0;
 843
 844         if (allocate_vmid)
 845                 *allocate_vmid = 0;
 846
 847         mutex_lock(&dqm->lock);
 848
 849         if (dqm->total_queue_count >= max_num_of_queues_per_device) {
 850                 pr_warn("amdkfd: Can't create new usermode queue because %d queues were already created\n",
 851                                 dqm->total_queue_count);
 852                 retval = -EPERM;
 853                 goto out;
 854         }
 855
 856         if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
 857                 select_sdma_engine_id(q);
 858
 859         mqd = dqm->ops.get_mqd_manager(dqm,
 860                         get_mqd_type_from_queue_type(q->properties.type));
 861
 862         if (mqd == NULL) {
 863                 mutex_unlock(&dqm->lock);
 864                 return -ENOMEM;
 865         }
 866
 867         retval = mqd->init_mqd(mqd, &q->mqd, &q->mqd_mem_obj,
 868                                 &q->gart_mqd_addr, &q->properties);
 869         if (retval != 0)
 870                 goto out;
 871
 872         list_add(&q->list, &qpd->queues_list);
 873         if (q->properties.is_active) {
 874                 dqm->queue_count++;
 875                 retval = execute_queues_cpsch(dqm, false);
 876         }
 877
 878         if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
 879                         dqm->sdma_queue_count++;
 880         /*
 881          * Unconditionally increment this counter, regardless of the queue's
 882          * type or whether the queue is active.
 883          */
 884         dqm->total_queue_count++;
 885
 886         pr_debug("Total of %d queues are accountable so far\n",
 887                         dqm->total_queue_count);
 888
 889 out:
 890         mutex_unlock(&dqm->lock);
 891         return retval;
 892 }
 893
 894 static int fence_wait_timeout(unsigned int *fence_addr,
 895                                 unsigned int fence_value,
 896                                 unsigned long timeout)
 897 {
 898         BUG_ON(!fence_addr);
 899         timeout += jiffies;
 900
 901         while (*fence_addr != fence_value) {
 902                 if (time_after(jiffies, timeout)) {
 903                         pr_err("kfd: qcm fence wait loop timeout expired\n");
 904                         return -ETIME;
 905                 }
 906                 schedule();
 907         }
 908
 909         return 0;
 910 }
 911
 912 static int destroy_sdma_queues(struct device_queue_manager *dqm,
 913                                 unsigned int sdma_engine)
 914 {
 915         return pm_send_unmap_queue(&dqm->packets, KFD_QUEUE_TYPE_SDMA,
 916                         KFD_PREEMPT_TYPE_FILTER_ALL_QUEUES, 0, false,
 917                         sdma_engine);
 918 }
 919
 920 static int destroy_queues_cpsch(struct device_queue_manager *dqm, bool lock)
 921 {
 922         int retval;
 923
 924         BUG_ON(!dqm);
 925
 926         retval = 0;
 927
 928         if (lock)
 929                 mutex_lock(&dqm->lock);
 930         if (dqm->active_runlist == false)
 931                 goto out;
 932
 933         pr_debug("kfd: Before destroying queues, sdma queue count is : %u\n",
 934                 dqm->sdma_queue_count);
 935
 936         if (dqm->sdma_queue_count > 0) {
 937                 destroy_sdma_queues(dqm, 0);
 938                 destroy_sdma_queues(dqm, 1);
 939         }
 940
 941         retval = pm_send_unmap_queue(&dqm->packets, KFD_QUEUE_TYPE_COMPUTE,
 942                         KFD_PREEMPT_TYPE_FILTER_ALL_QUEUES, 0, false, 0);
 943         if (retval != 0)
 944                 goto out;
 945
 946         *dqm->fence_addr = KFD_FENCE_INIT;
 947         pm_send_query_status(&dqm->packets, dqm->fence_gpu_addr,
 948                                 KFD_FENCE_COMPLETED);
 949         /* should be timed out */
 950         fence_wait_timeout(dqm->fence_addr, KFD_FENCE_COMPLETED,
 951                                 QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS);
 952         pm_release_ib(&dqm->packets);
 953         dqm->active_runlist = false;
 954
 955 out:
 956         if (lock)
 957                 mutex_unlock(&dqm->lock);
 958         return retval;
 959 }
 960
 961 static int execute_queues_cpsch(struct device_queue_manager *dqm, bool lock)
 962 {
 963         int retval;
 964
 965         BUG_ON(!dqm);
 966
 967         if (lock)
 968                 mutex_lock(&dqm->lock);
 969
 970         retval = destroy_queues_cpsch(dqm, false);
 971         if (retval != 0) {
 972                 pr_err("kfd: the cp might be in an unrecoverable state due to an unsuccessful queues preemption");
 973                 goto out;
 974         }
 975
 976         if (dqm->queue_count <= 0 || dqm->processes_count <= 0) {
 977                 retval = 0;
 978                 goto out;
 979         }
 980
 981         if (dqm->active_runlist) {
 982                 retval = 0;
 983                 goto out;
 984         }
 985
 986         retval = pm_send_runlist(&dqm->packets, &dqm->queues);
 987         if (retval != 0) {
 988                 pr_err("kfd: failed to execute runlist");
 989                 goto out;
 990         }
 991         dqm->active_runlist = true;
 992
 993 out:
 994         if (lock)
 995                 mutex_unlock(&dqm->lock);
 996         return retval;
 997 }
 998
 999 static int destroy_queue_cpsch(struct device_queue_manager *dqm,
1000                                 struct qcm_process_device *qpd,
1001                                 struct queue *q)
1002 {
1003         int retval;
1004         struct mqd_manager *mqd;
1005
1006         BUG_ON(!dqm || !qpd || !q);
1007
1008         retval = 0;
1009
1010         /* remove queue from list to prevent rescheduling after preemption */
1011         mutex_lock(&dqm->lock);
1012         mqd = dqm->ops.get_mqd_manager(dqm,
1013                         get_mqd_type_from_queue_type(q->properties.type));
1014         if (!mqd) {
1015                 retval = -ENOMEM;
1016                 goto failed;
1017         }
1018
1019         if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
1020                 dqm->sdma_queue_count--;
1021
1022         list_del(&q->list);
1023         if (q->properties.is_active)
1024                 dqm->queue_count--;
1025
1026         execute_queues_cpsch(dqm, false);
1027
1028         mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
1029
1030         /*
1031          * Unconditionally decrement this counter, regardless of the queue's
1032          * type
1033          */
1034         dqm->total_queue_count--;
1035         pr_debug("Total of %d queues are accountable so far\n",
1036                         dqm->total_queue_count);
1037
1038         mutex_unlock(&dqm->lock);
1039
1040         return 0;
1041
1042 failed:
1043         mutex_unlock(&dqm->lock);
1044         return retval;
1045 }
1046
1047 /*
1048  * Low bits must be 0000/FFFF as required by HW, high bits must be 0 to
1049  * stay in user mode.
1050  */
1051 #define APE1_FIXED_BITS_MASK 0xFFFF80000000FFFFULL
1052 /* APE1 limit is inclusive and 64K aligned. */
1053 #define APE1_LIMIT_ALIGNMENT 0xFFFF
1054
1055 static bool set_cache_memory_policy(struct device_queue_manager *dqm,
1056                                    struct qcm_process_device *qpd,
1057                                    enum cache_policy default_policy,
1058                                    enum cache_policy alternate_policy,
1059                                    void __user *alternate_aperture_base,
1060                                    uint64_t alternate_aperture_size)
1061 {
1062         bool retval;
1063
1064         pr_debug("kfd: In func %s\n", __func__);
1065
1066         mutex_lock(&dqm->lock);
1067
1068         if (alternate_aperture_size == 0) {
1069                 /* base > limit disables APE1 */
1070                 qpd->sh_mem_ape1_base = 1;
1071                 qpd->sh_mem_ape1_limit = 0;
1072         } else {
1073                 /*
1074                  * In FSA64, APE1_Base[63:0] = { 16{SH_MEM_APE1_BASE[31]},
1075                  *                      SH_MEM_APE1_BASE[31:0], 0x0000 }
1076                  * APE1_Limit[63:0] = { 16{SH_MEM_APE1_LIMIT[31]},
1077                  *                      SH_MEM_APE1_LIMIT[31:0], 0xFFFF }
1078                  * Verify that the base and size parameters can be
1079                  * represented in this format and convert them.
1080                  * Additionally restrict APE1 to user-mode addresses.
1081                  */
1082
1083                 uint64_t base = (uintptr_t)alternate_aperture_base;
1084                 uint64_t limit = base + alternate_aperture_size - 1;
1085
1086                 if (limit <= base)
1087                         goto out;
1088
1089                 if ((base & APE1_FIXED_BITS_MASK) != 0)
1090                         goto out;
1091
1092                 if ((limit & APE1_FIXED_BITS_MASK) != APE1_LIMIT_ALIGNMENT)
1093                         goto out;
1094
1095                 qpd->sh_mem_ape1_base = base >> 16;
1096                 qpd->sh_mem_ape1_limit = limit >> 16;
1097         }
1098
1099         retval = dqm->ops_asic_specific.set_cache_memory_policy(
1100                         dqm,
1101                         qpd,
1102                         default_policy,
1103                         alternate_policy,
1104                         alternate_aperture_base,
1105                         alternate_aperture_size);
1106
1107         if ((sched_policy == KFD_SCHED_POLICY_NO_HWS) && (qpd->vmid != 0))
1108                 program_sh_mem_settings(dqm, qpd);
1109
1110         pr_debug("kfd: sh_mem_config: 0x%x, ape1_base: 0x%x, ape1_limit: 0x%x\n",
1111                 qpd->sh_mem_config, qpd->sh_mem_ape1_base,
1112                 qpd->sh_mem_ape1_limit);
1113
1114         mutex_unlock(&dqm->lock);
1115         return retval;
1116
1117 out:
1118         mutex_unlock(&dqm->lock);
1119         return false;
1120 }
1121
1122 struct device_queue_manager *device_queue_manager_init(struct kfd_dev *dev)
1123 {
1124         struct device_queue_manager *dqm;
1125
1126         BUG_ON(!dev);
1127
1128         pr_debug("kfd: loading device queue manager\n");
1129
1130         dqm = kzalloc(sizeof(struct device_queue_manager), GFP_KERNEL);
1131         if (!dqm)
1132                 return NULL;
1133
1134         dqm->dev = dev;
1135         switch (sched_policy) {
1136         case KFD_SCHED_POLICY_HWS:
1137         case KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION:
1138                 /* initialize dqm for cp scheduling */
1139                 dqm->ops.create_queue = create_queue_cpsch;
1140                 dqm->ops.initialize = initialize_cpsch;
1141                 dqm->ops.start = start_cpsch;
1142                 dqm->ops.stop = stop_cpsch;
1143                 dqm->ops.destroy_queue = destroy_queue_cpsch;
1144                 dqm->ops.update_queue = update_queue;
1145                 dqm->ops.get_mqd_manager = get_mqd_manager_nocpsch;
1146                 dqm->ops.register_process = register_process_nocpsch;
1147                 dqm->ops.unregister_process = unregister_process_nocpsch;
1148                 dqm->ops.uninitialize = uninitialize_nocpsch;
1149                 dqm->ops.create_kernel_queue = create_kernel_queue_cpsch;
1150                 dqm->ops.destroy_kernel_queue = destroy_kernel_queue_cpsch;
1151                 dqm->ops.set_cache_memory_policy = set_cache_memory_policy;
1152                 break;
1153         case KFD_SCHED_POLICY_NO_HWS:
1154                 /* initialize dqm for no cp scheduling */
1155                 dqm->ops.start = start_nocpsch;
1156                 dqm->ops.stop = stop_nocpsch;
1157                 dqm->ops.create_queue = create_queue_nocpsch;
1158                 dqm->ops.destroy_queue = destroy_queue_nocpsch;
1159                 dqm->ops.update_queue = update_queue;
1160                 dqm->ops.get_mqd_manager = get_mqd_manager_nocpsch;
1161                 dqm->ops.register_process = register_process_nocpsch;
1162                 dqm->ops.unregister_process = unregister_process_nocpsch;
1163                 dqm->ops.initialize = initialize_nocpsch;
1164                 dqm->ops.uninitialize = uninitialize_nocpsch;
1165                 dqm->ops.set_cache_memory_policy = set_cache_memory_policy;
1166                 break;
1167         default:
1168                 BUG();
1169                 break;
1170         }
1171
1172         switch (dev->device_info->asic_family) {
1173         case CHIP_CARRIZO:
1174                 device_queue_manager_init_vi(&dqm->ops_asic_specific);
1175                 break;
1176
1177         case CHIP_KAVERI:
1178                 device_queue_manager_init_cik(&dqm->ops_asic_specific);
1179                 break;
1180         }
1181
1182         if (dqm->ops.initialize(dqm) != 0) {
1183                 kfree(dqm);
1184                 return NULL;
1185         }
1186
1187         return dqm;
1188 }
1189
1190 void device_queue_manager_uninit(struct device_queue_manager *dqm)
1191 {
1192         BUG_ON(!dqm);
1193
1194         dqm->ops.uninitialize(dqm);
1195         kfree(dqm);
1196 }