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/ratelimit.h>
  25 #include <linux/printk.h>
  26 #include <linux/slab.h>
  27 #include <linux/list.h>
  28 #include <linux/types.h>
  29 #include <linux/bitops.h>
  30 #include <linux/sched.h>
  31 #include "kfd_priv.h"
  32 #include "kfd_device_queue_manager.h"
  33 #include "kfd_mqd_manager.h"
  34 #include "cik_regs.h"
  35 #include "kfd_kernel_queue.h"
  36
  37 /* Size of the per-pipe EOP queue */
  38 #define CIK_HPD_EOP_BYTES_LOG2 11
  39 #define CIK_HPD_EOP_BYTES (1U << CIK_HPD_EOP_BYTES_LOG2)
  40
  41 static int set_pasid_vmid_mapping(struct device_queue_manager *dqm,
  42                                         unsigned int pasid, unsigned int vmid);
  43
  44 static int create_compute_queue_nocpsch(struct device_queue_manager *dqm,
  45                                         struct queue *q,
  46                                         struct qcm_process_device *qpd);
  47
  48 static int execute_queues_cpsch(struct device_queue_manager *dqm,
  49                                 enum kfd_unmap_queues_filter filter,
  50                                 uint32_t filter_param);
  51 static int unmap_queues_cpsch(struct device_queue_manager *dqm,
  52                                 enum kfd_unmap_queues_filter filter,
  53                                 uint32_t filter_param);
  54
  55 static int map_queues_cpsch(struct device_queue_manager *dqm);
  56
  57 static int create_sdma_queue_nocpsch(struct device_queue_manager *dqm,
  58                                         struct queue *q,
  59                                         struct qcm_process_device *qpd);
  60
  61 static void deallocate_sdma_queue(struct device_queue_manager *dqm,
  62                                 unsigned int sdma_queue_id);
  63
  64 static inline
  65 enum KFD_MQD_TYPE get_mqd_type_from_queue_type(enum kfd_queue_type type)
  66 {
  67         if (type == KFD_QUEUE_TYPE_SDMA)
  68                 return KFD_MQD_TYPE_SDMA;
  69         return KFD_MQD_TYPE_CP;
  70 }
  71
  72 static bool is_pipe_enabled(struct device_queue_manager *dqm, int mec, int pipe)
  73 {
  74         int i;
  75         int pipe_offset = mec * dqm->dev->shared_resources.num_pipe_per_mec
  76                 + pipe * dqm->dev->shared_resources.num_queue_per_pipe;
  77
  78         /* queue is available for KFD usage if bit is 1 */
  79         for (i = 0; i <  dqm->dev->shared_resources.num_queue_per_pipe; ++i)
  80                 if (test_bit(pipe_offset + i,
  81                               dqm->dev->shared_resources.queue_bitmap))
  82                         return true;
  83         return false;
  84 }
  85
  86 unsigned int get_queues_num(struct device_queue_manager *dqm)
  87 {
  88         return bitmap_weight(dqm->dev->shared_resources.queue_bitmap,
  89                                 KGD_MAX_QUEUES);
  90 }
  91
  92 unsigned int get_queues_per_pipe(struct device_queue_manager *dqm)
  93 {
  94         return dqm->dev->shared_resources.num_queue_per_pipe;
  95 }
  96
  97 unsigned int get_pipes_per_mec(struct device_queue_manager *dqm)
  98 {
  99         return dqm->dev->shared_resources.num_pipe_per_mec;
 100 }
 101
 102 void program_sh_mem_settings(struct device_queue_manager *dqm,
 103                                         struct qcm_process_device *qpd)
 104 {
 105         return dqm->dev->kfd2kgd->program_sh_mem_settings(
 106                                                 dqm->dev->kgd, qpd->vmid,
 107                                                 qpd->sh_mem_config,
 108                                                 qpd->sh_mem_ape1_base,
 109                                                 qpd->sh_mem_ape1_limit,
 110                                                 qpd->sh_mem_bases);
 111 }
 112
 113 static int allocate_doorbell(struct qcm_process_device *qpd, struct queue *q)
 114 {
 115         struct kfd_dev *dev = qpd->dqm->dev;
 116
 117         if (!KFD_IS_SOC15(dev->device_info->asic_family)) {
 118                 /* On pre-SOC15 chips we need to use the queue ID to
 119                  * preserve the user mode ABI.
 120                  */
 121                 q->doorbell_id = q->properties.queue_id;
 122         } else if (q->properties.type == KFD_QUEUE_TYPE_SDMA) {
 123                 /* For SDMA queues on SOC15, use static doorbell
 124                  * assignments based on the engine and queue.
 125                  */
 126                 q->doorbell_id = dev->shared_resources.sdma_doorbell
 127                         [q->properties.sdma_engine_id]
 128                         [q->properties.sdma_queue_id];
 129         } else {
 130                 /* For CP queues on SOC15 reserve a free doorbell ID */
 131                 unsigned int found;
 132
 133                 found = find_first_zero_bit(qpd->doorbell_bitmap,
 134                                             KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
 135                 if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
 136                         pr_debug("No doorbells available");
 137                         return -EBUSY;
 138                 }
 139                 set_bit(found, qpd->doorbell_bitmap);
 140                 q->doorbell_id = found;
 141         }
 142
 143         q->properties.doorbell_off =
 144                 kfd_doorbell_id_to_offset(dev, q->process,
 145                                           q->doorbell_id);
 146
 147         return 0;
 148 }
 149
 150 static void deallocate_doorbell(struct qcm_process_device *qpd,
 151                                 struct queue *q)
 152 {
 153         unsigned int old;
 154         struct kfd_dev *dev = qpd->dqm->dev;
 155
 156         if (!KFD_IS_SOC15(dev->device_info->asic_family) ||
 157             q->properties.type == KFD_QUEUE_TYPE_SDMA)
 158                 return;
 159
 160         old = test_and_clear_bit(q->doorbell_id, qpd->doorbell_bitmap);
 161         WARN_ON(!old);
 162 }
 163
 164 static int allocate_vmid(struct device_queue_manager *dqm,
 165                         struct qcm_process_device *qpd,
 166                         struct queue *q)
 167 {
 168         int bit, allocated_vmid;
 169
 170         if (dqm->vmid_bitmap == 0)
 171                 return -ENOMEM;
 172
 173         bit = ffs(dqm->vmid_bitmap) - 1;
 174         dqm->vmid_bitmap &= ~(1 << bit);
 175
 176         allocated_vmid = bit + dqm->dev->vm_info.first_vmid_kfd;
 177         pr_debug("vmid allocation %d\n", allocated_vmid);
 178         qpd->vmid = allocated_vmid;
 179         q->properties.vmid = allocated_vmid;
 180
 181         set_pasid_vmid_mapping(dqm, q->process->pasid, q->properties.vmid);
 182         program_sh_mem_settings(dqm, qpd);
 183
 184         /* qpd->page_table_base is set earlier when register_process()
 185          * is called, i.e. when the first queue is created.
 186          */
 187         dqm->dev->kfd2kgd->set_vm_context_page_table_base(dqm->dev->kgd,
 188                         qpd->vmid,
 189                         qpd->page_table_base);
 190         /* invalidate the VM context after pasid and vmid mapping is set up */
 191         kfd_flush_tlb(qpd_to_pdd(qpd));
 192
 193         return 0;
 194 }
 195
 196 static int flush_texture_cache_nocpsch(struct kfd_dev *kdev,
 197                                 struct qcm_process_device *qpd)
 198 {
 199         const struct packet_manager_funcs *pmf = qpd->dqm->packets.pmf;
 200         int ret;
 201
 202         if (!qpd->ib_kaddr)
 203                 return -ENOMEM;
 204
 205         ret = pmf->release_mem(qpd->ib_base, (uint32_t *)qpd->ib_kaddr);
 206         if (ret)
 207                 return ret;
 208
 209         return kdev->kfd2kgd->submit_ib(kdev->kgd, KGD_ENGINE_MEC1, qpd->vmid,
 210                                 qpd->ib_base, (uint32_t *)qpd->ib_kaddr,
 211                                 pmf->release_mem_size / sizeof(uint32_t));
 212 }
 213
 214 static void deallocate_vmid(struct device_queue_manager *dqm,
 215                                 struct qcm_process_device *qpd,
 216                                 struct queue *q)
 217 {
 218         int bit = qpd->vmid - dqm->dev->vm_info.first_vmid_kfd;
 219
 220         /* On GFX v7, CP doesn't flush TC at dequeue */
 221         if (q->device->device_info->asic_family == CHIP_HAWAII)
 222                 if (flush_texture_cache_nocpsch(q->device, qpd))
 223                         pr_err("Failed to flush TC\n");
 224
 225         kfd_flush_tlb(qpd_to_pdd(qpd));
 226
 227         /* Release the vmid mapping */
 228         set_pasid_vmid_mapping(dqm, 0, qpd->vmid);
 229
 230         dqm->vmid_bitmap |= (1 << bit);
 231         qpd->vmid = 0;
 232         q->properties.vmid = 0;
 233 }
 234
 235 static int create_queue_nocpsch(struct device_queue_manager *dqm,
 236                                 struct queue *q,
 237                                 struct qcm_process_device *qpd)
 238 {
 239         int retval;
 240
 241         print_queue(q);
 242
 243         mutex_lock(&dqm->lock);
 244
 245         if (dqm->total_queue_count >= max_num_of_queues_per_device) {
 246                 pr_warn("Can't create new usermode queue because %d queues were already created\n",
 247                                 dqm->total_queue_count);
 248                 retval = -EPERM;
 249                 goto out_unlock;
 250         }
 251
 252         if (list_empty(&qpd->queues_list)) {
 253                 retval = allocate_vmid(dqm, qpd, q);
 254                 if (retval)
 255                         goto out_unlock;
 256         }
 257         q->properties.vmid = qpd->vmid;
 258         /*
 259          * Eviction state logic: we only mark active queues as evicted
 260          * to avoid the overhead of restoring inactive queues later
 261          */
 262         if (qpd->evicted)
 263                 q->properties.is_evicted = (q->properties.queue_size > 0 &&
 264                                             q->properties.queue_percent > 0 &&
 265                                             q->properties.queue_address != 0);
 266
 267         q->properties.tba_addr = qpd->tba_addr;
 268         q->properties.tma_addr = qpd->tma_addr;
 269
 270         if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE)
 271                 retval = create_compute_queue_nocpsch(dqm, q, qpd);
 272         else if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
 273                 retval = create_sdma_queue_nocpsch(dqm, q, qpd);
 274         else
 275                 retval = -EINVAL;
 276
 277         if (retval) {
 278                 if (list_empty(&qpd->queues_list))
 279                         deallocate_vmid(dqm, qpd, q);
 280                 goto out_unlock;
 281         }
 282
 283         list_add(&q->list, &qpd->queues_list);
 284         qpd->queue_count++;
 285         if (q->properties.is_active)
 286                 dqm->queue_count++;
 287
 288         if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
 289                 dqm->sdma_queue_count++;
 290
 291         /*
 292          * Unconditionally increment this counter, regardless of the queue's
 293          * type or whether the queue is active.
 294          */
 295         dqm->total_queue_count++;
 296         pr_debug("Total of %d queues are accountable so far\n",
 297                         dqm->total_queue_count);
 298
 299 out_unlock:
 300         mutex_unlock(&dqm->lock);
 301         return retval;
 302 }
 303
 304 static int allocate_hqd(struct device_queue_manager *dqm, struct queue *q)
 305 {
 306         bool set;
 307         int pipe, bit, i;
 308
 309         set = false;
 310
 311         for (pipe = dqm->next_pipe_to_allocate, i = 0;
 312                         i < get_pipes_per_mec(dqm);
 313                         pipe = ((pipe + 1) % get_pipes_per_mec(dqm)), ++i) {
 314
 315                 if (!is_pipe_enabled(dqm, 0, pipe))
 316                         continue;
 317
 318                 if (dqm->allocated_queues[pipe] != 0) {
 319                         bit = ffs(dqm->allocated_queues[pipe]) - 1;
 320                         dqm->allocated_queues[pipe] &= ~(1 << bit);
 321                         q->pipe = pipe;
 322                         q->queue = bit;
 323                         set = true;
 324                         break;
 325                 }
 326         }
 327
 328         if (!set)
 329                 return -EBUSY;
 330
 331         pr_debug("hqd slot - pipe %d, queue %d\n", q->pipe, q->queue);
 332         /* horizontal hqd allocation */
 333         dqm->next_pipe_to_allocate = (pipe + 1) % get_pipes_per_mec(dqm);
 334
 335         return 0;
 336 }
 337
 338 static inline void deallocate_hqd(struct device_queue_manager *dqm,
 339                                 struct queue *q)
 340 {
 341         dqm->allocated_queues[q->pipe] |= (1 << q->queue);
 342 }
 343
 344 static int create_compute_queue_nocpsch(struct device_queue_manager *dqm,
 345                                         struct queue *q,
 346                                         struct qcm_process_device *qpd)
 347 {
 348         int retval;
 349         struct mqd_manager *mqd;
 350
 351         mqd = dqm->ops.get_mqd_manager(dqm, KFD_MQD_TYPE_COMPUTE);
 352         if (!mqd)
 353                 return -ENOMEM;
 354
 355         retval = allocate_hqd(dqm, q);
 356         if (retval)
 357                 return retval;
 358
 359         retval = allocate_doorbell(qpd, q);
 360         if (retval)
 361                 goto out_deallocate_hqd;
 362
 363         retval = mqd->init_mqd(mqd, &q->mqd, &q->mqd_mem_obj,
 364                                 &q->gart_mqd_addr, &q->properties);
 365         if (retval)
 366                 goto out_deallocate_doorbell;
 367
 368         pr_debug("Loading mqd to hqd on pipe %d, queue %d\n",
 369                         q->pipe, q->queue);
 370
 371         dqm->dev->kfd2kgd->set_scratch_backing_va(
 372                         dqm->dev->kgd, qpd->sh_hidden_private_base, qpd->vmid);
 373
 374         if (!q->properties.is_active)
 375                 return 0;
 376
 377         retval = mqd->load_mqd(mqd, q->mqd, q->pipe, q->queue, &q->properties,
 378                                q->process->mm);
 379         if (retval)
 380                 goto out_uninit_mqd;
 381
 382         return 0;
 383
 384 out_uninit_mqd:
 385         mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
 386 out_deallocate_doorbell:
 387         deallocate_doorbell(qpd, q);
 388 out_deallocate_hqd:
 389         deallocate_hqd(dqm, q);
 390
 391         return retval;
 392 }
 393
 394 /* Access to DQM has to be locked before calling destroy_queue_nocpsch_locked
 395  * to avoid asynchronized access
 396  */
 397 static int destroy_queue_nocpsch_locked(struct device_queue_manager *dqm,
 398                                 struct qcm_process_device *qpd,
 399                                 struct queue *q)
 400 {
 401         int retval;
 402         struct mqd_manager *mqd;
 403
 404         mqd = dqm->ops.get_mqd_manager(dqm,
 405                 get_mqd_type_from_queue_type(q->properties.type));
 406         if (!mqd)
 407                 return -ENOMEM;
 408
 409         if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE) {
 410                 deallocate_hqd(dqm, q);
 411         } else if (q->properties.type == KFD_QUEUE_TYPE_SDMA) {
 412                 dqm->sdma_queue_count--;
 413                 deallocate_sdma_queue(dqm, q->sdma_id);
 414         } else {
 415                 pr_debug("q->properties.type %d is invalid\n",
 416                                 q->properties.type);
 417                 return -EINVAL;
 418         }
 419         dqm->total_queue_count--;
 420
 421         deallocate_doorbell(qpd, q);
 422
 423         retval = mqd->destroy_mqd(mqd, q->mqd,
 424                                 KFD_PREEMPT_TYPE_WAVEFRONT_RESET,
 425                                 KFD_UNMAP_LATENCY_MS,
 426                                 q->pipe, q->queue);
 427         if (retval == -ETIME)
 428                 qpd->reset_wavefronts = true;
 429
 430         mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
 431
 432         list_del(&q->list);
 433         if (list_empty(&qpd->queues_list)) {
 434                 if (qpd->reset_wavefronts) {
 435                         pr_warn("Resetting wave fronts (nocpsch) on dev %p\n",
 436                                         dqm->dev);
 437                         /* dbgdev_wave_reset_wavefronts has to be called before
 438                          * deallocate_vmid(), i.e. when vmid is still in use.
 439                          */
 440                         dbgdev_wave_reset_wavefronts(dqm->dev,
 441                                         qpd->pqm->process);
 442                         qpd->reset_wavefronts = false;
 443                 }
 444
 445                 deallocate_vmid(dqm, qpd, q);
 446         }
 447         qpd->queue_count--;
 448         if (q->properties.is_active)
 449                 dqm->queue_count--;
 450
 451         return retval;
 452 }
 453
 454 static int destroy_queue_nocpsch(struct device_queue_manager *dqm,
 455                                 struct qcm_process_device *qpd,
 456                                 struct queue *q)
 457 {
 458         int retval;
 459
 460         mutex_lock(&dqm->lock);
 461         retval = destroy_queue_nocpsch_locked(dqm, qpd, q);
 462         mutex_unlock(&dqm->lock);
 463
 464         return retval;
 465 }
 466
 467 static int update_queue(struct device_queue_manager *dqm, struct queue *q)
 468 {
 469         int retval;
 470         struct mqd_manager *mqd;
 471         struct kfd_process_device *pdd;
 472         bool prev_active = false;
 473
 474         mutex_lock(&dqm->lock);
 475         pdd = kfd_get_process_device_data(q->device, q->process);
 476         if (!pdd) {
 477                 retval = -ENODEV;
 478                 goto out_unlock;
 479         }
 480         mqd = dqm->ops.get_mqd_manager(dqm,
 481                         get_mqd_type_from_queue_type(q->properties.type));
 482         if (!mqd) {
 483                 retval = -ENOMEM;
 484                 goto out_unlock;
 485         }
 486         /*
 487          * Eviction state logic: we only mark active queues as evicted
 488          * to avoid the overhead of restoring inactive queues later
 489          */
 490         if (pdd->qpd.evicted)
 491                 q->properties.is_evicted = (q->properties.queue_size > 0 &&
 492                                             q->properties.queue_percent > 0 &&
 493                                             q->properties.queue_address != 0);
 494
 495         /* Save previous activity state for counters */
 496         prev_active = q->properties.is_active;
 497
 498         /* Make sure the queue is unmapped before updating the MQD */
 499         if (dqm->sched_policy != KFD_SCHED_POLICY_NO_HWS) {
 500                 retval = unmap_queues_cpsch(dqm,
 501                                 KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0);
 502                 if (retval) {
 503                         pr_err("unmap queue failed\n");
 504                         goto out_unlock;
 505                 }
 506         } else if (prev_active &&
 507                    (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
 508                     q->properties.type == KFD_QUEUE_TYPE_SDMA)) {
 509                 retval = mqd->destroy_mqd(mqd, q->mqd,
 510                                 KFD_PREEMPT_TYPE_WAVEFRONT_DRAIN,
 511                                 KFD_UNMAP_LATENCY_MS, q->pipe, q->queue);
 512                 if (retval) {
 513                         pr_err("destroy mqd failed\n");
 514                         goto out_unlock;
 515                 }
 516         }
 517
 518         retval = mqd->update_mqd(mqd, q->mqd, &q->properties);
 519
 520         /*
 521          * check active state vs. the previous state and modify
 522          * counter accordingly. map_queues_cpsch uses the
 523          * dqm->queue_count to determine whether a new runlist must be
 524          * uploaded.
 525          */
 526         if (q->properties.is_active && !prev_active)
 527                 dqm->queue_count++;
 528         else if (!q->properties.is_active && prev_active)
 529                 dqm->queue_count--;
 530
 531         if (dqm->sched_policy != KFD_SCHED_POLICY_NO_HWS)
 532                 retval = map_queues_cpsch(dqm);
 533         else if (q->properties.is_active &&
 534                  (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
 535                   q->properties.type == KFD_QUEUE_TYPE_SDMA))
 536                 retval = mqd->load_mqd(mqd, q->mqd, q->pipe, q->queue,
 537                                        &q->properties, q->process->mm);
 538
 539 out_unlock:
 540         mutex_unlock(&dqm->lock);
 541         return retval;
 542 }
 543
 544 static struct mqd_manager *get_mqd_manager(
 545                 struct device_queue_manager *dqm, enum KFD_MQD_TYPE type)
 546 {
 547         struct mqd_manager *mqd;
 548
 549         if (WARN_ON(type >= KFD_MQD_TYPE_MAX))
 550                 return NULL;
 551
 552         pr_debug("mqd type %d\n", type);
 553
 554         mqd = dqm->mqds[type];
 555         if (!mqd) {
 556                 mqd = mqd_manager_init(type, dqm->dev);
 557                 if (!mqd)
 558                         pr_err("mqd manager is NULL");
 559                 dqm->mqds[type] = mqd;
 560         }
 561
 562         return mqd;
 563 }
 564
 565 static int evict_process_queues_nocpsch(struct device_queue_manager *dqm,
 566                                         struct qcm_process_device *qpd)
 567 {
 568         struct queue *q;
 569         struct mqd_manager *mqd;
 570         struct kfd_process_device *pdd;
 571         int retval = 0;
 572
 573         mutex_lock(&dqm->lock);
 574         if (qpd->evicted++ > 0) /* already evicted, do nothing */
 575                 goto out;
 576
 577         pdd = qpd_to_pdd(qpd);
 578         pr_info_ratelimited("Evicting PASID %u queues\n",
 579                             pdd->process->pasid);
 580
 581         /* unactivate all active queues on the qpd */
 582         list_for_each_entry(q, &qpd->queues_list, list) {
 583                 if (!q->properties.is_active)
 584                         continue;
 585                 mqd = dqm->ops.get_mqd_manager(dqm,
 586                         get_mqd_type_from_queue_type(q->properties.type));
 587                 if (!mqd) { /* should not be here */
 588                         pr_err("Cannot evict queue, mqd mgr is NULL\n");
 589                         retval = -ENOMEM;
 590                         goto out;
 591                 }
 592                 q->properties.is_evicted = true;
 593                 q->properties.is_active = false;
 594                 retval = mqd->destroy_mqd(mqd, q->mqd,
 595                                 KFD_PREEMPT_TYPE_WAVEFRONT_DRAIN,
 596                                 KFD_UNMAP_LATENCY_MS, q->pipe, q->queue);
 597                 if (retval)
 598                         goto out;
 599                 dqm->queue_count--;
 600         }
 601
 602 out:
 603         mutex_unlock(&dqm->lock);
 604         return retval;
 605 }
 606
 607 static int evict_process_queues_cpsch(struct device_queue_manager *dqm,
 608                                       struct qcm_process_device *qpd)
 609 {
 610         struct queue *q;
 611         struct kfd_process_device *pdd;
 612         int retval = 0;
 613
 614         mutex_lock(&dqm->lock);
 615         if (qpd->evicted++ > 0) /* already evicted, do nothing */
 616                 goto out;
 617
 618         pdd = qpd_to_pdd(qpd);
 619         pr_info_ratelimited("Evicting PASID %u queues\n",
 620                             pdd->process->pasid);
 621
 622         /* unactivate all active queues on the qpd */
 623         list_for_each_entry(q, &qpd->queues_list, list) {
 624                 if (!q->properties.is_active)
 625                         continue;
 626                 q->properties.is_evicted = true;
 627                 q->properties.is_active = false;
 628                 dqm->queue_count--;
 629         }
 630         retval = execute_queues_cpsch(dqm,
 631                                 qpd->is_debug ?
 632                                 KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES :
 633                                 KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0);
 634
 635 out:
 636         mutex_unlock(&dqm->lock);
 637         return retval;
 638 }
 639
 640 static int restore_process_queues_nocpsch(struct device_queue_manager *dqm,
 641                                           struct qcm_process_device *qpd)
 642 {
 643         struct queue *q;
 644         struct mqd_manager *mqd;
 645         struct kfd_process_device *pdd;
 646         uint32_t pd_base;
 647         int retval = 0;
 648
 649         pdd = qpd_to_pdd(qpd);
 650         /* Retrieve PD base */
 651         pd_base = dqm->dev->kfd2kgd->get_process_page_dir(pdd->vm);
 652
 653         mutex_lock(&dqm->lock);
 654         if (WARN_ON_ONCE(!qpd->evicted)) /* already restored, do nothing */
 655                 goto out;
 656         if (qpd->evicted > 1) { /* ref count still > 0, decrement & quit */
 657                 qpd->evicted--;
 658                 goto out;
 659         }
 660
 661         pr_info_ratelimited("Restoring PASID %u queues\n",
 662                             pdd->process->pasid);
 663
 664         /* Update PD Base in QPD */
 665         qpd->page_table_base = pd_base;
 666         pr_debug("Updated PD address to 0x%08x\n", pd_base);
 667
 668         if (!list_empty(&qpd->queues_list)) {
 669                 dqm->dev->kfd2kgd->set_vm_context_page_table_base(
 670                                 dqm->dev->kgd,
 671                                 qpd->vmid,
 672                                 qpd->page_table_base);
 673                 kfd_flush_tlb(pdd);
 674         }
 675
 676         /* activate all active queues on the qpd */
 677         list_for_each_entry(q, &qpd->queues_list, list) {
 678                 if (!q->properties.is_evicted)
 679                         continue;
 680                 mqd = dqm->ops.get_mqd_manager(dqm,
 681                         get_mqd_type_from_queue_type(q->properties.type));
 682                 if (!mqd) { /* should not be here */
 683                         pr_err("Cannot restore queue, mqd mgr is NULL\n");
 684                         retval = -ENOMEM;
 685                         goto out;
 686                 }
 687                 q->properties.is_evicted = false;
 688                 q->properties.is_active = true;
 689                 retval = mqd->load_mqd(mqd, q->mqd, q->pipe,
 690                                        q->queue, &q->properties,
 691                                        q->process->mm);
 692                 if (retval)
 693                         goto out;
 694                 dqm->queue_count++;
 695         }
 696         qpd->evicted = 0;
 697 out:
 698         mutex_unlock(&dqm->lock);
 699         return retval;
 700 }
 701
 702 static int restore_process_queues_cpsch(struct device_queue_manager *dqm,
 703                                         struct qcm_process_device *qpd)
 704 {
 705         struct queue *q;
 706         struct kfd_process_device *pdd;
 707         uint32_t pd_base;
 708         int retval = 0;
 709
 710         pdd = qpd_to_pdd(qpd);
 711         /* Retrieve PD base */
 712         pd_base = dqm->dev->kfd2kgd->get_process_page_dir(pdd->vm);
 713
 714         mutex_lock(&dqm->lock);
 715         if (WARN_ON_ONCE(!qpd->evicted)) /* already restored, do nothing */
 716                 goto out;
 717         if (qpd->evicted > 1) { /* ref count still > 0, decrement & quit */
 718                 qpd->evicted--;
 719                 goto out;
 720         }
 721
 722         pr_info_ratelimited("Restoring PASID %u queues\n",
 723                             pdd->process->pasid);
 724
 725         /* Update PD Base in QPD */
 726         qpd->page_table_base = pd_base;
 727         pr_debug("Updated PD address to 0x%08x\n", pd_base);
 728
 729         /* activate all active queues on the qpd */
 730         list_for_each_entry(q, &qpd->queues_list, list) {
 731                 if (!q->properties.is_evicted)
 732                         continue;
 733                 q->properties.is_evicted = false;
 734                 q->properties.is_active = true;
 735                 dqm->queue_count++;
 736         }
 737         retval = execute_queues_cpsch(dqm,
 738                                 KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0);
 739         if (!retval)
 740                 qpd->evicted = 0;
 741 out:
 742         mutex_unlock(&dqm->lock);
 743         return retval;
 744 }
 745
 746 static int register_process(struct device_queue_manager *dqm,
 747                                         struct qcm_process_device *qpd)
 748 {
 749         struct device_process_node *n;
 750         struct kfd_process_device *pdd;
 751         uint32_t pd_base;
 752         int retval;
 753
 754         n = kzalloc(sizeof(*n), GFP_KERNEL);
 755         if (!n)
 756                 return -ENOMEM;
 757
 758         n->qpd = qpd;
 759
 760         pdd = qpd_to_pdd(qpd);
 761         /* Retrieve PD base */
 762         pd_base = dqm->dev->kfd2kgd->get_process_page_dir(pdd->vm);
 763
 764         mutex_lock(&dqm->lock);
 765         list_add(&n->list, &dqm->queues);
 766
 767         /* Update PD Base in QPD */
 768         qpd->page_table_base = pd_base;
 769
 770         retval = dqm->asic_ops.update_qpd(dqm, qpd);
 771
 772         dqm->processes_count++;
 773
 774         mutex_unlock(&dqm->lock);
 775
 776         return retval;
 777 }
 778
 779 static int unregister_process(struct device_queue_manager *dqm,
 780                                         struct qcm_process_device *qpd)
 781 {
 782         int retval;
 783         struct device_process_node *cur, *next;
 784
 785         pr_debug("qpd->queues_list is %s\n",
 786                         list_empty(&qpd->queues_list) ? "empty" : "not empty");
 787
 788         retval = 0;
 789         mutex_lock(&dqm->lock);
 790
 791         list_for_each_entry_safe(cur, next, &dqm->queues, list) {
 792                 if (qpd == cur->qpd) {
 793                         list_del(&cur->list);
 794                         kfree(cur);
 795                         dqm->processes_count--;
 796                         goto out;
 797                 }
 798         }
 799         /* qpd not found in dqm list */
 800         retval = 1;
 801 out:
 802         mutex_unlock(&dqm->lock);
 803         return retval;
 804 }
 805
 806 static int
 807 set_pasid_vmid_mapping(struct device_queue_manager *dqm, unsigned int pasid,
 808                         unsigned int vmid)
 809 {
 810         uint32_t pasid_mapping;
 811
 812         pasid_mapping = (pasid == 0) ? 0 :
 813                 (uint32_t)pasid |
 814                 ATC_VMID_PASID_MAPPING_VALID;
 815
 816         return dqm->dev->kfd2kgd->set_pasid_vmid_mapping(
 817                                                 dqm->dev->kgd, pasid_mapping,
 818                                                 vmid);
 819 }
 820
 821 static void init_interrupts(struct device_queue_manager *dqm)
 822 {
 823         unsigned int i;
 824
 825         for (i = 0 ; i < get_pipes_per_mec(dqm) ; i++)
 826                 if (is_pipe_enabled(dqm, 0, i))
 827                         dqm->dev->kfd2kgd->init_interrupts(dqm->dev->kgd, i);
 828 }
 829
 830 static int initialize_nocpsch(struct device_queue_manager *dqm)
 831 {
 832         int pipe, queue;
 833
 834         pr_debug("num of pipes: %d\n", get_pipes_per_mec(dqm));
 835
 836         dqm->allocated_queues = kcalloc(get_pipes_per_mec(dqm),
 837                                         sizeof(unsigned int), GFP_KERNEL);
 838         if (!dqm->allocated_queues)
 839                 return -ENOMEM;
 840
 841         mutex_init(&dqm->lock);
 842         INIT_LIST_HEAD(&dqm->queues);
 843         dqm->queue_count = dqm->next_pipe_to_allocate = 0;
 844         dqm->sdma_queue_count = 0;
 845
 846         for (pipe = 0; pipe < get_pipes_per_mec(dqm); pipe++) {
 847                 int pipe_offset = pipe * get_queues_per_pipe(dqm);
 848
 849                 for (queue = 0; queue < get_queues_per_pipe(dqm); queue++)
 850                         if (test_bit(pipe_offset + queue,
 851                                      dqm->dev->shared_resources.queue_bitmap))
 852                                 dqm->allocated_queues[pipe] |= 1 << queue;
 853         }
 854
 855         dqm->vmid_bitmap = (1 << dqm->dev->vm_info.vmid_num_kfd) - 1;
 856         dqm->sdma_bitmap = (1 << CIK_SDMA_QUEUES) - 1;
 857
 858         return 0;
 859 }
 860
 861 static void uninitialize(struct device_queue_manager *dqm)
 862 {
 863         int i;
 864
 865         WARN_ON(dqm->queue_count > 0 || dqm->processes_count > 0);
 866
 867         kfree(dqm->allocated_queues);
 868         for (i = 0 ; i < KFD_MQD_TYPE_MAX ; i++)
 869                 kfree(dqm->mqds[i]);
 870         mutex_destroy(&dqm->lock);
 871         kfd_gtt_sa_free(dqm->dev, dqm->pipeline_mem);
 872 }
 873
 874 static int start_nocpsch(struct device_queue_manager *dqm)
 875 {
 876         init_interrupts(dqm);
 877         return pm_init(&dqm->packets, dqm);
 878 }
 879
 880 static int stop_nocpsch(struct device_queue_manager *dqm)
 881 {
 882         pm_uninit(&dqm->packets);
 883         return 0;
 884 }
 885
 886 static int allocate_sdma_queue(struct device_queue_manager *dqm,
 887                                 unsigned int *sdma_queue_id)
 888 {
 889         int bit;
 890
 891         if (dqm->sdma_bitmap == 0)
 892                 return -ENOMEM;
 893
 894         bit = ffs(dqm->sdma_bitmap) - 1;
 895         dqm->sdma_bitmap &= ~(1 << bit);
 896         *sdma_queue_id = bit;
 897
 898         return 0;
 899 }
 900
 901 static void deallocate_sdma_queue(struct device_queue_manager *dqm,
 902                                 unsigned int sdma_queue_id)
 903 {
 904         if (sdma_queue_id >= CIK_SDMA_QUEUES)
 905                 return;
 906         dqm->sdma_bitmap |= (1 << sdma_queue_id);
 907 }
 908
 909 static int create_sdma_queue_nocpsch(struct device_queue_manager *dqm,
 910                                         struct queue *q,
 911                                         struct qcm_process_device *qpd)
 912 {
 913         struct mqd_manager *mqd;
 914         int retval;
 915
 916         mqd = dqm->ops.get_mqd_manager(dqm, KFD_MQD_TYPE_SDMA);
 917         if (!mqd)
 918                 return -ENOMEM;
 919
 920         retval = allocate_sdma_queue(dqm, &q->sdma_id);
 921         if (retval)
 922                 return retval;
 923
 924         q->properties.sdma_queue_id = q->sdma_id / CIK_SDMA_QUEUES_PER_ENGINE;
 925         q->properties.sdma_engine_id = q->sdma_id % CIK_SDMA_QUEUES_PER_ENGINE;
 926
 927         retval = allocate_doorbell(qpd, q);
 928         if (retval)
 929                 goto out_deallocate_sdma_queue;
 930
 931         pr_debug("SDMA id is:    %d\n", q->sdma_id);
 932         pr_debug("SDMA queue id: %d\n", q->properties.sdma_queue_id);
 933         pr_debug("SDMA engine id: %d\n", q->properties.sdma_engine_id);
 934
 935         dqm->asic_ops.init_sdma_vm(dqm, q, qpd);
 936         retval = mqd->init_mqd(mqd, &q->mqd, &q->mqd_mem_obj,
 937                                 &q->gart_mqd_addr, &q->properties);
 938         if (retval)
 939                 goto out_deallocate_doorbell;
 940
 941         retval = mqd->load_mqd(mqd, q->mqd, 0, 0, &q->properties, NULL);
 942         if (retval)
 943                 goto out_uninit_mqd;
 944
 945         return 0;
 946
 947 out_uninit_mqd:
 948         mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
 949 out_deallocate_doorbell:
 950         deallocate_doorbell(qpd, q);
 951 out_deallocate_sdma_queue:
 952         deallocate_sdma_queue(dqm, q->sdma_id);
 953
 954         return retval;
 955 }
 956
 957 /*
 958  * Device Queue Manager implementation for cp scheduler
 959  */
 960
 961 static int set_sched_resources(struct device_queue_manager *dqm)
 962 {
 963         int i, mec;
 964         struct scheduling_resources res;
 965
 966         res.vmid_mask = dqm->dev->shared_resources.compute_vmid_bitmap;
 967
 968         res.queue_mask = 0;
 969         for (i = 0; i < KGD_MAX_QUEUES; ++i) {
 970                 mec = (i / dqm->dev->shared_resources.num_queue_per_pipe)
 971                         / dqm->dev->shared_resources.num_pipe_per_mec;
 972
 973                 if (!test_bit(i, dqm->dev->shared_resources.queue_bitmap))
 974                         continue;
 975
 976                 /* only acquire queues from the first MEC */
 977                 if (mec > 0)
 978                         continue;
 979
 980                 /* This situation may be hit in the future if a new HW
 981                  * generation exposes more than 64 queues. If so, the
 982                  * definition of res.queue_mask needs updating
 983                  */
 984                 if (WARN_ON(i >= (sizeof(res.queue_mask)*8))) {
 985                         pr_err("Invalid queue enabled by amdgpu: %d\n", i);
 986                         break;
 987                 }
 988
 989                 res.queue_mask |= (1ull << i);
 990         }
 991         res.gws_mask = res.oac_mask = res.gds_heap_base =
 992                                                 res.gds_heap_size = 0;
 993
 994         pr_debug("Scheduling resources:\n"
 995                         "vmid mask: 0x%8X\n"
 996                         "queue mask: 0x%8llX\n",
 997                         res.vmid_mask, res.queue_mask);
 998
 999         return pm_send_set_resources(&dqm->packets, &res);
1000 }
1001
1002 static int initialize_cpsch(struct device_queue_manager *dqm)
1003 {
1004         pr_debug("num of pipes: %d\n", get_pipes_per_mec(dqm));
1005
1006         mutex_init(&dqm->lock);
1007         INIT_LIST_HEAD(&dqm->queues);
1008         dqm->queue_count = dqm->processes_count = 0;
1009         dqm->sdma_queue_count = 0;
1010         dqm->active_runlist = false;
1011         dqm->sdma_bitmap = (1 << CIK_SDMA_QUEUES) - 1;
1012
1013         return 0;
1014 }
1015
1016 static int start_cpsch(struct device_queue_manager *dqm)
1017 {
1018         int retval;
1019
1020         retval = 0;
1021
1022         retval = pm_init(&dqm->packets, dqm);
1023         if (retval)
1024                 goto fail_packet_manager_init;
1025
1026         retval = set_sched_resources(dqm);
1027         if (retval)
1028                 goto fail_set_sched_resources;
1029
1030         pr_debug("Allocating fence memory\n");
1031
1032         /* allocate fence memory on the gart */
1033         retval = kfd_gtt_sa_allocate(dqm->dev, sizeof(*dqm->fence_addr),
1034                                         &dqm->fence_mem);
1035
1036         if (retval)
1037                 goto fail_allocate_vidmem;
1038
1039         dqm->fence_addr = dqm->fence_mem->cpu_ptr;
1040         dqm->fence_gpu_addr = dqm->fence_mem->gpu_addr;
1041
1042         init_interrupts(dqm);
1043
1044         mutex_lock(&dqm->lock);
1045         execute_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0);
1046         mutex_unlock(&dqm->lock);
1047
1048         return 0;
1049 fail_allocate_vidmem:
1050 fail_set_sched_resources:
1051         pm_uninit(&dqm->packets);
1052 fail_packet_manager_init:
1053         return retval;
1054 }
1055
1056 static int stop_cpsch(struct device_queue_manager *dqm)
1057 {
1058         mutex_lock(&dqm->lock);
1059         unmap_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES, 0);
1060         mutex_unlock(&dqm->lock);
1061
1062         kfd_gtt_sa_free(dqm->dev, dqm->fence_mem);
1063         pm_uninit(&dqm->packets);
1064
1065         return 0;
1066 }
1067
1068 static int create_kernel_queue_cpsch(struct device_queue_manager *dqm,
1069                                         struct kernel_queue *kq,
1070                                         struct qcm_process_device *qpd)
1071 {
1072         mutex_lock(&dqm->lock);
1073         if (dqm->total_queue_count >= max_num_of_queues_per_device) {
1074                 pr_warn("Can't create new kernel queue because %d queues were already created\n",
1075                                 dqm->total_queue_count);
1076                 mutex_unlock(&dqm->lock);
1077                 return -EPERM;
1078         }
1079
1080         /*
1081          * Unconditionally increment this counter, regardless of the queue's
1082          * type or whether the queue is active.
1083          */
1084         dqm->total_queue_count++;
1085         pr_debug("Total of %d queues are accountable so far\n",
1086                         dqm->total_queue_count);
1087
1088         list_add(&kq->list, &qpd->priv_queue_list);
1089         dqm->queue_count++;
1090         qpd->is_debug = true;
1091         execute_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0);
1092         mutex_unlock(&dqm->lock);
1093
1094         return 0;
1095 }
1096
1097 static void destroy_kernel_queue_cpsch(struct device_queue_manager *dqm,
1098                                         struct kernel_queue *kq,
1099                                         struct qcm_process_device *qpd)
1100 {
1101         mutex_lock(&dqm->lock);
1102         list_del(&kq->list);
1103         dqm->queue_count--;
1104         qpd->is_debug = false;
1105         execute_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES, 0);
1106         /*
1107          * Unconditionally decrement this counter, regardless of the queue's
1108          * type.
1109          */
1110         dqm->total_queue_count--;
1111         pr_debug("Total of %d queues are accountable so far\n",
1112                         dqm->total_queue_count);
1113         mutex_unlock(&dqm->lock);
1114 }
1115
1116 static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q,
1117                         struct qcm_process_device *qpd)
1118 {
1119         int retval;
1120         struct mqd_manager *mqd;
1121
1122         retval = 0;
1123
1124         mutex_lock(&dqm->lock);
1125
1126         if (dqm->total_queue_count >= max_num_of_queues_per_device) {
1127                 pr_warn("Can't create new usermode queue because %d queues were already created\n",
1128                                 dqm->total_queue_count);
1129                 retval = -EPERM;
1130                 goto out_unlock;
1131         }
1132
1133         if (q->properties.type == KFD_QUEUE_TYPE_SDMA) {
1134                 retval = allocate_sdma_queue(dqm, &q->sdma_id);
1135                 if (retval)
1136                         goto out_unlock;
1137                 q->properties.sdma_queue_id =
1138                         q->sdma_id / CIK_SDMA_QUEUES_PER_ENGINE;
1139                 q->properties.sdma_engine_id =
1140                         q->sdma_id % CIK_SDMA_QUEUES_PER_ENGINE;
1141         }
1142
1143         retval = allocate_doorbell(qpd, q);
1144         if (retval)
1145                 goto out_deallocate_sdma_queue;
1146
1147         mqd = dqm->ops.get_mqd_manager(dqm,
1148                         get_mqd_type_from_queue_type(q->properties.type));
1149
1150         if (!mqd) {
1151                 retval = -ENOMEM;
1152                 goto out_deallocate_doorbell;
1153         }
1154         /*
1155          * Eviction state logic: we only mark active queues as evicted
1156          * to avoid the overhead of restoring inactive queues later
1157          */
1158         if (qpd->evicted)
1159                 q->properties.is_evicted = (q->properties.queue_size > 0 &&
1160                                             q->properties.queue_percent > 0 &&
1161                                             q->properties.queue_address != 0);
1162
1163         dqm->asic_ops.init_sdma_vm(dqm, q, qpd);
1164
1165         q->properties.tba_addr = qpd->tba_addr;
1166         q->properties.tma_addr = qpd->tma_addr;
1167         retval = mqd->init_mqd(mqd, &q->mqd, &q->mqd_mem_obj,
1168                                 &q->gart_mqd_addr, &q->properties);
1169         if (retval)
1170                 goto out_deallocate_doorbell;
1171
1172         list_add(&q->list, &qpd->queues_list);
1173         qpd->queue_count++;
1174         if (q->properties.is_active) {
1175                 dqm->queue_count++;
1176                 retval = execute_queues_cpsch(dqm,
1177                                 KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0);
1178         }
1179
1180         if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
1181                 dqm->sdma_queue_count++;
1182         /*
1183          * Unconditionally increment this counter, regardless of the queue's
1184          * type or whether the queue is active.
1185          */
1186         dqm->total_queue_count++;
1187
1188         pr_debug("Total of %d queues are accountable so far\n",
1189                         dqm->total_queue_count);
1190
1191         mutex_unlock(&dqm->lock);
1192         return retval;
1193
1194 out_deallocate_doorbell:
1195         deallocate_doorbell(qpd, q);
1196 out_deallocate_sdma_queue:
1197         if (q->properties.type == KFD_QUEUE_TYPE_SDMA)
1198                 deallocate_sdma_queue(dqm, q->sdma_id);
1199 out_unlock:
1200         mutex_unlock(&dqm->lock);
1201         return retval;
1202 }
1203
1204 int amdkfd_fence_wait_timeout(unsigned int *fence_addr,
1205                                 unsigned int fence_value,
1206                                 unsigned int timeout_ms)
1207 {
1208         unsigned long end_jiffies = msecs_to_jiffies(timeout_ms) + jiffies;
1209
1210         while (*fence_addr != fence_value) {
1211                 if (time_after(jiffies, end_jiffies)) {
1212                         pr_err("qcm fence wait loop timeout expired\n");
1213                         return -ETIME;
1214                 }
1215                 schedule();
1216         }
1217
1218         return 0;
1219 }
1220
1221 static int unmap_sdma_queues(struct device_queue_manager *dqm,
1222                                 unsigned int sdma_engine)
1223 {
1224         return pm_send_unmap_queue(&dqm->packets, KFD_QUEUE_TYPE_SDMA,
1225                         KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0, false,
1226                         sdma_engine);
1227 }
1228
1229 /* dqm->lock mutex has to be locked before calling this function */
1230 static int map_queues_cpsch(struct device_queue_manager *dqm)
1231 {
1232         int retval;
1233
1234         if (dqm->queue_count <= 0 || dqm->processes_count <= 0)
1235                 return 0;
1236
1237         if (dqm->active_runlist)
1238                 return 0;
1239
1240         retval = pm_send_runlist(&dqm->packets, &dqm->queues);
1241         if (retval) {
1242                 pr_err("failed to execute runlist\n");
1243                 return retval;
1244         }
1245         dqm->active_runlist = true;
1246
1247         return retval;
1248 }
1249
1250 /* dqm->lock mutex has to be locked before calling this function */
1251 static int unmap_queues_cpsch(struct device_queue_manager *dqm,
1252                                 enum kfd_unmap_queues_filter filter,
1253                                 uint32_t filter_param)
1254 {
1255         int retval = 0;
1256
1257         if (!dqm->active_runlist)
1258                 return retval;
1259
1260         pr_debug("Before destroying queues, sdma queue count is : %u\n",
1261                 dqm->sdma_queue_count);
1262
1263         if (dqm->sdma_queue_count > 0) {
1264                 unmap_sdma_queues(dqm, 0);
1265                 unmap_sdma_queues(dqm, 1);
1266         }
1267
1268         retval = pm_send_unmap_queue(&dqm->packets, KFD_QUEUE_TYPE_COMPUTE,
1269                         filter, filter_param, false, 0);
1270         if (retval)
1271                 return retval;
1272
1273         *dqm->fence_addr = KFD_FENCE_INIT;
1274         pm_send_query_status(&dqm->packets, dqm->fence_gpu_addr,
1275                                 KFD_FENCE_COMPLETED);
1276         /* should be timed out */
1277         retval = amdkfd_fence_wait_timeout(dqm->fence_addr, KFD_FENCE_COMPLETED,
1278                                 QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS);
1279         if (retval)
1280                 return retval;
1281
1282         pm_release_ib(&dqm->packets);
1283         dqm->active_runlist = false;
1284
1285         return retval;
1286 }
1287
1288 /* dqm->lock mutex has to be locked before calling this function */
1289 static int execute_queues_cpsch(struct device_queue_manager *dqm,
1290                                 enum kfd_unmap_queues_filter filter,
1291                                 uint32_t filter_param)
1292 {
1293         int retval;
1294
1295         retval = unmap_queues_cpsch(dqm, filter, filter_param);
1296         if (retval) {
1297                 pr_err("The cp might be in an unrecoverable state due to an unsuccessful queues preemption\n");
1298                 return retval;
1299         }
1300
1301         return map_queues_cpsch(dqm);
1302 }
1303
1304 static int destroy_queue_cpsch(struct device_queue_manager *dqm,
1305                                 struct qcm_process_device *qpd,
1306                                 struct queue *q)
1307 {
1308         int retval;
1309         struct mqd_manager *mqd;
1310         bool preempt_all_queues;
1311
1312         preempt_all_queues = false;
1313
1314         retval = 0;
1315
1316         /* remove queue from list to prevent rescheduling after preemption */
1317         mutex_lock(&dqm->lock);
1318
1319         if (qpd->is_debug) {
1320                 /*
1321                  * error, currently we do not allow to destroy a queue
1322                  * of a currently debugged process
1323                  */
1324                 retval = -EBUSY;
1325                 goto failed_try_destroy_debugged_queue;
1326
1327         }
1328
1329         mqd = dqm->ops.get_mqd_manager(dqm,
1330                         get_mqd_type_from_queue_type(q->properties.type));
1331         if (!mqd) {
1332                 retval = -ENOMEM;
1333                 goto failed;
1334         }
1335
1336         deallocate_doorbell(qpd, q);
1337
1338         if (q->properties.type == KFD_QUEUE_TYPE_SDMA) {
1339                 dqm->sdma_queue_count--;
1340                 deallocate_sdma_queue(dqm, q->sdma_id);
1341         }
1342
1343         list_del(&q->list);
1344         qpd->queue_count--;
1345         if (q->properties.is_active) {
1346                 dqm->queue_count--;
1347                 retval = execute_queues_cpsch(dqm,
1348                                 KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0);
1349                 if (retval == -ETIME)
1350                         qpd->reset_wavefronts = true;
1351         }
1352
1353         mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
1354
1355         /*
1356          * Unconditionally decrement this counter, regardless of the queue's
1357          * type
1358          */
1359         dqm->total_queue_count--;
1360         pr_debug("Total of %d queues are accountable so far\n",
1361                         dqm->total_queue_count);
1362
1363         mutex_unlock(&dqm->lock);
1364
1365         return retval;
1366
1367 failed:
1368 failed_try_destroy_debugged_queue:
1369
1370         mutex_unlock(&dqm->lock);
1371         return retval;
1372 }
1373
1374 /*
1375  * Low bits must be 0000/FFFF as required by HW, high bits must be 0 to
1376  * stay in user mode.
1377  */
1378 #define APE1_FIXED_BITS_MASK 0xFFFF80000000FFFFULL
1379 /* APE1 limit is inclusive and 64K aligned. */
1380 #define APE1_LIMIT_ALIGNMENT 0xFFFF
1381
1382 static bool set_cache_memory_policy(struct device_queue_manager *dqm,
1383                                    struct qcm_process_device *qpd,
1384                                    enum cache_policy default_policy,
1385                                    enum cache_policy alternate_policy,
1386                                    void __user *alternate_aperture_base,
1387                                    uint64_t alternate_aperture_size)
1388 {
1389         bool retval = true;
1390
1391         if (!dqm->asic_ops.set_cache_memory_policy)
1392                 return retval;
1393
1394         mutex_lock(&dqm->lock);
1395
1396         if (alternate_aperture_size == 0) {
1397                 /* base > limit disables APE1 */
1398                 qpd->sh_mem_ape1_base = 1;
1399                 qpd->sh_mem_ape1_limit = 0;
1400         } else {
1401                 /*
1402                  * In FSA64, APE1_Base[63:0] = { 16{SH_MEM_APE1_BASE[31]},
1403                  *                      SH_MEM_APE1_BASE[31:0], 0x0000 }
1404                  * APE1_Limit[63:0] = { 16{SH_MEM_APE1_LIMIT[31]},
1405                  *                      SH_MEM_APE1_LIMIT[31:0], 0xFFFF }
1406                  * Verify that the base and size parameters can be
1407                  * represented in this format and convert them.
1408                  * Additionally restrict APE1 to user-mode addresses.
1409                  */
1410
1411                 uint64_t base = (uintptr_t)alternate_aperture_base;
1412                 uint64_t limit = base + alternate_aperture_size - 1;
1413
1414                 if (limit <= base || (base & APE1_FIXED_BITS_MASK) != 0 ||
1415                    (limit & APE1_FIXED_BITS_MASK) != APE1_LIMIT_ALIGNMENT) {
1416                         retval = false;
1417                         goto out;
1418                 }
1419
1420                 qpd->sh_mem_ape1_base = base >> 16;
1421                 qpd->sh_mem_ape1_limit = limit >> 16;
1422         }
1423
1424         retval = dqm->asic_ops.set_cache_memory_policy(
1425                         dqm,
1426                         qpd,
1427                         default_policy,
1428                         alternate_policy,
1429                         alternate_aperture_base,
1430                         alternate_aperture_size);
1431
1432         if ((dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) && (qpd->vmid != 0))
1433                 program_sh_mem_settings(dqm, qpd);
1434
1435         pr_debug("sh_mem_config: 0x%x, ape1_base: 0x%x, ape1_limit: 0x%x\n",
1436                 qpd->sh_mem_config, qpd->sh_mem_ape1_base,
1437                 qpd->sh_mem_ape1_limit);
1438
1439 out:
1440         mutex_unlock(&dqm->lock);
1441         return retval;
1442 }
1443
1444 static int set_trap_handler(struct device_queue_manager *dqm,
1445                                 struct qcm_process_device *qpd,
1446                                 uint64_t tba_addr,
1447                                 uint64_t tma_addr)
1448 {
1449         uint64_t *tma;
1450
1451         if (dqm->dev->cwsr_enabled) {
1452                 /* Jump from CWSR trap handler to user trap */
1453                 tma = (uint64_t *)(qpd->cwsr_kaddr + KFD_CWSR_TMA_OFFSET);
1454                 tma[0] = tba_addr;
1455                 tma[1] = tma_addr;
1456         } else {
1457                 qpd->tba_addr = tba_addr;
1458                 qpd->tma_addr = tma_addr;
1459         }
1460
1461         return 0;
1462 }
1463
1464 static int process_termination_nocpsch(struct device_queue_manager *dqm,
1465                 struct qcm_process_device *qpd)
1466 {
1467         struct queue *q, *next;
1468         struct device_process_node *cur, *next_dpn;
1469         int retval = 0;
1470
1471         mutex_lock(&dqm->lock);
1472
1473         /* Clear all user mode queues */
1474         list_for_each_entry_safe(q, next, &qpd->queues_list, list) {
1475                 int ret;
1476
1477                 ret = destroy_queue_nocpsch_locked(dqm, qpd, q);
1478                 if (ret)
1479                         retval = ret;
1480         }
1481
1482         /* Unregister process */
1483         list_for_each_entry_safe(cur, next_dpn, &dqm->queues, list) {
1484                 if (qpd == cur->qpd) {
1485                         list_del(&cur->list);
1486                         kfree(cur);
1487                         dqm->processes_count--;
1488                         break;
1489                 }
1490         }
1491
1492         mutex_unlock(&dqm->lock);
1493         return retval;
1494 }
1495
1496
1497 static int process_termination_cpsch(struct device_queue_manager *dqm,
1498                 struct qcm_process_device *qpd)
1499 {
1500         int retval;
1501         struct queue *q, *next;
1502         struct kernel_queue *kq, *kq_next;
1503         struct mqd_manager *mqd;
1504         struct device_process_node *cur, *next_dpn;
1505         enum kfd_unmap_queues_filter filter =
1506                 KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES;
1507
1508         retval = 0;
1509
1510         mutex_lock(&dqm->lock);
1511
1512         /* Clean all kernel queues */
1513         list_for_each_entry_safe(kq, kq_next, &qpd->priv_queue_list, list) {
1514                 list_del(&kq->list);
1515                 dqm->queue_count--;
1516                 qpd->is_debug = false;
1517                 dqm->total_queue_count--;
1518                 filter = KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES;
1519         }
1520
1521         /* Clear all user mode queues */
1522         list_for_each_entry(q, &qpd->queues_list, list) {
1523                 if (q->properties.type == KFD_QUEUE_TYPE_SDMA) {
1524                         dqm->sdma_queue_count--;
1525                         deallocate_sdma_queue(dqm, q->sdma_id);
1526                 }
1527
1528                 if (q->properties.is_active)
1529                         dqm->queue_count--;
1530
1531                 dqm->total_queue_count--;
1532         }
1533
1534         /* Unregister process */
1535         list_for_each_entry_safe(cur, next_dpn, &dqm->queues, list) {
1536                 if (qpd == cur->qpd) {
1537                         list_del(&cur->list);
1538                         kfree(cur);
1539                         dqm->processes_count--;
1540                         break;
1541                 }
1542         }
1543
1544         retval = execute_queues_cpsch(dqm, filter, 0);
1545         if (retval || qpd->reset_wavefronts) {
1546                 pr_warn("Resetting wave fronts (cpsch) on dev %p\n", dqm->dev);
1547                 dbgdev_wave_reset_wavefronts(dqm->dev, qpd->pqm->process);
1548                 qpd->reset_wavefronts = false;
1549         }
1550
1551         /* lastly, free mqd resources */
1552         list_for_each_entry_safe(q, next, &qpd->queues_list, list) {
1553                 mqd = dqm->ops.get_mqd_manager(dqm,
1554                         get_mqd_type_from_queue_type(q->properties.type));
1555                 if (!mqd) {
1556                         retval = -ENOMEM;
1557                         goto out;
1558                 }
1559                 list_del(&q->list);
1560                 qpd->queue_count--;
1561                 mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
1562         }
1563
1564 out:
1565         mutex_unlock(&dqm->lock);
1566         return retval;
1567 }
1568
1569 struct device_queue_manager *device_queue_manager_init(struct kfd_dev *dev)
1570 {
1571         struct device_queue_manager *dqm;
1572
1573         pr_debug("Loading device queue manager\n");
1574
1575         dqm = kzalloc(sizeof(*dqm), GFP_KERNEL);
1576         if (!dqm)
1577                 return NULL;
1578
1579         switch (dev->device_info->asic_family) {
1580         /* HWS is not available on Hawaii. */
1581         case CHIP_HAWAII:
1582         /* HWS depends on CWSR for timely dequeue. CWSR is not
1583          * available on Tonga.
1584          *
1585          * FIXME: This argument also applies to Kaveri.
1586          */
1587         case CHIP_TONGA:
1588                 dqm->sched_policy = KFD_SCHED_POLICY_NO_HWS;
1589                 break;
1590         default:
1591                 dqm->sched_policy = sched_policy;
1592                 break;
1593         }
1594
1595         dqm->dev = dev;
1596         switch (dqm->sched_policy) {
1597         case KFD_SCHED_POLICY_HWS:
1598         case KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION:
1599                 /* initialize dqm for cp scheduling */
1600                 dqm->ops.create_queue = create_queue_cpsch;
1601                 dqm->ops.initialize = initialize_cpsch;
1602                 dqm->ops.start = start_cpsch;
1603                 dqm->ops.stop = stop_cpsch;
1604                 dqm->ops.destroy_queue = destroy_queue_cpsch;
1605                 dqm->ops.update_queue = update_queue;
1606                 dqm->ops.get_mqd_manager = get_mqd_manager;
1607                 dqm->ops.register_process = register_process;
1608                 dqm->ops.unregister_process = unregister_process;
1609                 dqm->ops.uninitialize = uninitialize;
1610                 dqm->ops.create_kernel_queue = create_kernel_queue_cpsch;
1611                 dqm->ops.destroy_kernel_queue = destroy_kernel_queue_cpsch;
1612                 dqm->ops.set_cache_memory_policy = set_cache_memory_policy;
1613                 dqm->ops.set_trap_handler = set_trap_handler;
1614                 dqm->ops.process_termination = process_termination_cpsch;
1615                 dqm->ops.evict_process_queues = evict_process_queues_cpsch;
1616                 dqm->ops.restore_process_queues = restore_process_queues_cpsch;
1617                 break;
1618         case KFD_SCHED_POLICY_NO_HWS:
1619                 /* initialize dqm for no cp scheduling */
1620                 dqm->ops.start = start_nocpsch;
1621                 dqm->ops.stop = stop_nocpsch;
1622                 dqm->ops.create_queue = create_queue_nocpsch;
1623                 dqm->ops.destroy_queue = destroy_queue_nocpsch;
1624                 dqm->ops.update_queue = update_queue;
1625                 dqm->ops.get_mqd_manager = get_mqd_manager;
1626                 dqm->ops.register_process = register_process;
1627                 dqm->ops.unregister_process = unregister_process;
1628                 dqm->ops.initialize = initialize_nocpsch;
1629                 dqm->ops.uninitialize = uninitialize;
1630                 dqm->ops.set_cache_memory_policy = set_cache_memory_policy;
1631                 dqm->ops.set_trap_handler = set_trap_handler;
1632                 dqm->ops.process_termination = process_termination_nocpsch;
1633                 dqm->ops.evict_process_queues = evict_process_queues_nocpsch;
1634                 dqm->ops.restore_process_queues =
1635                         restore_process_queues_nocpsch;
1636                 break;
1637         default:
1638                 pr_err("Invalid scheduling policy %d\n", dqm->sched_policy);
1639                 goto out_free;
1640         }
1641
1642         switch (dev->device_info->asic_family) {
1643         case CHIP_CARRIZO:
1644                 device_queue_manager_init_vi(&dqm->asic_ops);
1645                 break;
1646
1647         case CHIP_KAVERI:
1648                 device_queue_manager_init_cik(&dqm->asic_ops);
1649                 break;
1650
1651         case CHIP_HAWAII:
1652                 device_queue_manager_init_cik_hawaii(&dqm->asic_ops);
1653                 break;
1654
1655         case CHIP_TONGA:
1656         case CHIP_FIJI:
1657         case CHIP_POLARIS10:
1658         case CHIP_POLARIS11:
1659                 device_queue_manager_init_vi_tonga(&dqm->asic_ops);
1660                 break;
1661
1662         case CHIP_VEGA10:
1663         case CHIP_RAVEN:
1664                 device_queue_manager_init_v9(&dqm->asic_ops);
1665                 break;
1666         default:
1667                 WARN(1, "Unexpected ASIC family %u",
1668                      dev->device_info->asic_family);
1669                 goto out_free;
1670         }
1671
1672         if (!dqm->ops.initialize(dqm))
1673                 return dqm;
1674
1675 out_free:
1676         kfree(dqm);
1677         return NULL;
1678 }
1679
1680 void device_queue_manager_uninit(struct device_queue_manager *dqm)
1681 {
1682         dqm->ops.uninitialize(dqm);
1683         kfree(dqm);
1684 }
1685
1686 #if defined(CONFIG_DEBUG_FS)
1687
1688 static void seq_reg_dump(struct seq_file *m,
1689                          uint32_t (*dump)[2], uint32_t n_regs)
1690 {
1691         uint32_t i, count;
1692
1693         for (i = 0, count = 0; i < n_regs; i++) {
1694                 if (count == 0 ||
1695                     dump[i-1][0] + sizeof(uint32_t) != dump[i][0]) {
1696                         seq_printf(m, "%s    %08x: %08x",
1697                                    i ? "\n" : "",
1698                                    dump[i][0], dump[i][1]);
1699                         count = 7;
1700                 } else {
1701                         seq_printf(m, " %08x", dump[i][1]);
1702                         count--;
1703                 }
1704         }
1705
1706         seq_puts(m, "\n");
1707 }
1708
1709 int dqm_debugfs_hqds(struct seq_file *m, void *data)
1710 {
1711         struct device_queue_manager *dqm = data;
1712         uint32_t (*dump)[2], n_regs;
1713         int pipe, queue;
1714         int r = 0;
1715
1716         r = dqm->dev->kfd2kgd->hqd_dump(dqm->dev->kgd,
1717                 KFD_CIK_HIQ_PIPE, KFD_CIK_HIQ_QUEUE, &dump, &n_regs);
1718         if (!r) {
1719                 seq_printf(m, "  HIQ on MEC %d Pipe %d Queue %d\n",
1720                                 KFD_CIK_HIQ_PIPE/get_pipes_per_mec(dqm)+1,
1721                                 KFD_CIK_HIQ_PIPE%get_pipes_per_mec(dqm),
1722                                 KFD_CIK_HIQ_QUEUE);
1723                 seq_reg_dump(m, dump, n_regs);
1724
1725                 kfree(dump);
1726         }
1727
1728         for (pipe = 0; pipe < get_pipes_per_mec(dqm); pipe++) {
1729                 int pipe_offset = pipe * get_queues_per_pipe(dqm);
1730
1731                 for (queue = 0; queue < get_queues_per_pipe(dqm); queue++) {
1732                         if (!test_bit(pipe_offset + queue,
1733                                       dqm->dev->shared_resources.queue_bitmap))
1734                                 continue;
1735
1736                         r = dqm->dev->kfd2kgd->hqd_dump(
1737                                 dqm->dev->kgd, pipe, queue, &dump, &n_regs);
1738                         if (r)
1739                                 break;
1740
1741                         seq_printf(m, "  CP Pipe %d, Queue %d\n",
1742                                   pipe, queue);
1743                         seq_reg_dump(m, dump, n_regs);
1744
1745                         kfree(dump);
1746                 }
1747         }
1748
1749         for (pipe = 0; pipe < CIK_SDMA_ENGINE_NUM; pipe++) {
1750                 for (queue = 0; queue < CIK_SDMA_QUEUES_PER_ENGINE; queue++) {
1751                         r = dqm->dev->kfd2kgd->hqd_sdma_dump(
1752                                 dqm->dev->kgd, pipe, queue, &dump, &n_regs);
1753                         if (r)
1754                                 break;
1755
1756                         seq_printf(m, "  SDMA Engine %d, RLC %d\n",
1757                                   pipe, queue);
1758                         seq_reg_dump(m, dump, n_regs);
1759
1760                         kfree(dump);
1761                 }
1762         }
1763
1764         return r;
1765 }
1766
1767 #endif