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

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /*
   3  * Copyright 2014-2022 Advanced Micro Devices, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21  * OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include <linux/slab.h>
  26 #include <linux/list.h>
  27 #include "kfd_device_queue_manager.h"
  28 #include "kfd_priv.h"
  29 #include "kfd_kernel_queue.h"
  30 #include "amdgpu_amdkfd.h"
  31
  32 static inline struct process_queue_node *get_queue_by_qid(
  33                         struct process_queue_manager *pqm, unsigned int qid)
  34 {
  35         struct process_queue_node *pqn;
  36
  37         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
  38                 if ((pqn->q && pqn->q->properties.queue_id == qid) ||
  39                     (pqn->kq && pqn->kq->queue->properties.queue_id == qid))
  40                         return pqn;
  41         }
  42
  43         return NULL;
  44 }
  45
  46 static int assign_queue_slot_by_qid(struct process_queue_manager *pqm,
  47                                     unsigned int qid)
  48 {
  49         if (qid >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS)
  50                 return -EINVAL;
  51
  52         if (__test_and_set_bit(qid, pqm->queue_slot_bitmap)) {
  53                 pr_err("Cannot create new queue because requested qid(%u) is in use\n", qid);
  54                 return -ENOSPC;
  55         }
  56
  57         return 0;
  58 }
  59
  60 static int find_available_queue_slot(struct process_queue_manager *pqm,
  61                                         unsigned int *qid)
  62 {
  63         unsigned long found;
  64
  65         found = find_first_zero_bit(pqm->queue_slot_bitmap,
  66                         KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
  67
  68         pr_debug("The new slot id %lu\n", found);
  69
  70         if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
  71                 pr_info("Cannot open more queues for process with pasid 0x%x\n",
  72                                 pqm->process->pasid);
  73                 return -ENOMEM;
  74         }
  75
  76         set_bit(found, pqm->queue_slot_bitmap);
  77         *qid = found;
  78
  79         return 0;
  80 }
  81
  82 void kfd_process_dequeue_from_device(struct kfd_process_device *pdd)
  83 {
  84         struct kfd_node *dev = pdd->dev;
  85
  86         if (pdd->already_dequeued)
  87                 return;
  88
  89         dev->dqm->ops.process_termination(dev->dqm, &pdd->qpd);
  90         if (dev->kfd->shared_resources.enable_mes)
  91                 amdgpu_mes_flush_shader_debugger(dev->adev, pdd->proc_ctx_gpu_addr);
  92         pdd->already_dequeued = true;
  93 }
  94
  95 int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid,
  96                         void *gws)
  97 {
  98         struct kfd_node *dev = NULL;
  99         struct process_queue_node *pqn;
 100         struct kfd_process_device *pdd;
 101         struct kgd_mem *mem = NULL;
 102         int ret;
 103
 104         pqn = get_queue_by_qid(pqm, qid);
 105         if (!pqn) {
 106                 pr_err("Queue id does not match any known queue\n");
 107                 return -EINVAL;
 108         }
 109
 110         if (pqn->q)
 111                 dev = pqn->q->device;
 112         if (WARN_ON(!dev))
 113                 return -ENODEV;
 114
 115         pdd = kfd_get_process_device_data(dev, pqm->process);
 116         if (!pdd) {
 117                 pr_err("Process device data doesn't exist\n");
 118                 return -EINVAL;
 119         }
 120
 121         /* Only allow one queue per process can have GWS assigned */
 122         if (gws && pdd->qpd.num_gws)
 123                 return -EBUSY;
 124
 125         if (!gws && pdd->qpd.num_gws == 0)
 126                 return -EINVAL;
 127
 128         if (KFD_GC_VERSION(dev) != IP_VERSION(9, 4, 3) && !dev->kfd->shared_resources.enable_mes) {
 129                 if (gws)
 130                         ret = amdgpu_amdkfd_add_gws_to_process(pdd->process->kgd_process_info,
 131                                 gws, &mem);
 132                 else
 133                         ret = amdgpu_amdkfd_remove_gws_from_process(pdd->process->kgd_process_info,
 134                                 pqn->q->gws);
 135                 if (unlikely(ret))
 136                         return ret;
 137                 pqn->q->gws = mem;
 138         } else {
 139                 /*
 140                  * Intentionally set GWS to a non-NULL value
 141                  * for devices that do not use GWS for global wave
 142                  * synchronization but require the formality
 143                  * of setting GWS for cooperative groups.
 144                  */
 145                 pqn->q->gws = gws ? ERR_PTR(-ENOMEM) : NULL;
 146         }
 147
 148         pdd->qpd.num_gws = gws ? dev->adev->gds.gws_size : 0;
 149
 150         return pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 151                                                         pqn->q, NULL);
 152 }
 153
 154 void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
 155 {
 156         int i;
 157
 158         for (i = 0; i < p->n_pdds; i++)
 159                 kfd_process_dequeue_from_device(p->pdds[i]);
 160 }
 161
 162 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
 163 {
 164         INIT_LIST_HEAD(&pqm->queues);
 165         pqm->queue_slot_bitmap = bitmap_zalloc(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
 166                                                GFP_KERNEL);
 167         if (!pqm->queue_slot_bitmap)
 168                 return -ENOMEM;
 169         pqm->process = p;
 170
 171         return 0;
 172 }
 173
 174 static void pqm_clean_queue_resource(struct process_queue_manager *pqm,
 175                                      struct process_queue_node *pqn)
 176 {
 177         struct kfd_node *dev;
 178         struct kfd_process_device *pdd;
 179
 180         dev = pqn->q->device;
 181
 182         pdd = kfd_get_process_device_data(dev, pqm->process);
 183         if (!pdd) {
 184                 pr_err("Process device data doesn't exist\n");
 185                 return;
 186         }
 187
 188         if (pqn->q->gws) {
 189                 if (KFD_GC_VERSION(pqn->q->device) != IP_VERSION(9, 4, 3) &&
 190                     !dev->kfd->shared_resources.enable_mes)
 191                         amdgpu_amdkfd_remove_gws_from_process(
 192                                 pqm->process->kgd_process_info, pqn->q->gws);
 193                 pdd->qpd.num_gws = 0;
 194         }
 195
 196         if (dev->kfd->shared_resources.enable_mes) {
 197                 amdgpu_amdkfd_free_gtt_mem(dev->adev, pqn->q->gang_ctx_bo);
 198                 if (pqn->q->wptr_bo)
 199                         amdgpu_amdkfd_free_gtt_mem(dev->adev, pqn->q->wptr_bo);
 200         }
 201 }
 202
 203 void pqm_uninit(struct process_queue_manager *pqm)
 204 {
 205         struct process_queue_node *pqn, *next;
 206
 207         list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
 208                 if (pqn->q)
 209                         pqm_clean_queue_resource(pqm, pqn);
 210
 211                 kfd_procfs_del_queue(pqn->q);
 212                 uninit_queue(pqn->q);
 213                 list_del(&pqn->process_queue_list);
 214                 kfree(pqn);
 215         }
 216
 217         bitmap_free(pqm->queue_slot_bitmap);
 218         pqm->queue_slot_bitmap = NULL;
 219 }
 220
 221 static int init_user_queue(struct process_queue_manager *pqm,
 222                                 struct kfd_node *dev, struct queue **q,
 223                                 struct queue_properties *q_properties,
 224                                 struct file *f, struct amdgpu_bo *wptr_bo,
 225                                 unsigned int qid)
 226 {
 227         int retval;
 228
 229         /* Doorbell initialized in user space*/
 230         q_properties->doorbell_ptr = NULL;
 231         q_properties->exception_status = KFD_EC_MASK(EC_QUEUE_NEW);
 232
 233         /* let DQM handle it*/
 234         q_properties->vmid = 0;
 235         q_properties->queue_id = qid;
 236
 237         retval = init_queue(q, q_properties);
 238         if (retval != 0)
 239                 return retval;
 240
 241         (*q)->device = dev;
 242         (*q)->process = pqm->process;
 243
 244         if (dev->kfd->shared_resources.enable_mes) {
 245                 retval = amdgpu_amdkfd_alloc_gtt_mem(dev->adev,
 246                                                 AMDGPU_MES_GANG_CTX_SIZE,
 247                                                 &(*q)->gang_ctx_bo,
 248                                                 &(*q)->gang_ctx_gpu_addr,
 249                                                 &(*q)->gang_ctx_cpu_ptr,
 250                                                 false);
 251                 if (retval) {
 252                         pr_err("failed to allocate gang context bo\n");
 253                         goto cleanup;
 254                 }
 255                 memset((*q)->gang_ctx_cpu_ptr, 0, AMDGPU_MES_GANG_CTX_SIZE);
 256                 (*q)->wptr_bo = wptr_bo;
 257         }
 258
 259         pr_debug("PQM After init queue");
 260         return 0;
 261
 262 cleanup:
 263         uninit_queue(*q);
 264         *q = NULL;
 265         return retval;
 266 }
 267
 268 int pqm_create_queue(struct process_queue_manager *pqm,
 269                             struct kfd_node *dev,
 270                             struct file *f,
 271                             struct queue_properties *properties,
 272                             unsigned int *qid,
 273                             struct amdgpu_bo *wptr_bo,
 274                             const struct kfd_criu_queue_priv_data *q_data,
 275                             const void *restore_mqd,
 276                             const void *restore_ctl_stack,
 277                             uint32_t *p_doorbell_offset_in_process)
 278 {
 279         int retval;
 280         struct kfd_process_device *pdd;
 281         struct queue *q;
 282         struct process_queue_node *pqn;
 283         struct kernel_queue *kq;
 284         enum kfd_queue_type type = properties->type;
 285         unsigned int max_queues = 127; /* HWS limit */
 286
 287         /*
 288          * On GFX 9.4.3, increase the number of queues that
 289          * can be created to 255. No HWS limit on GFX 9.4.3.
 290          */
 291         if (KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 3))
 292                 max_queues = 255;
 293
 294         q = NULL;
 295         kq = NULL;
 296
 297         pdd = kfd_get_process_device_data(dev, pqm->process);
 298         if (!pdd) {
 299                 pr_err("Process device data doesn't exist\n");
 300                 return -1;
 301         }
 302
 303         /*
 304          * for debug process, verify that it is within the static queues limit
 305          * currently limit is set to half of the total avail HQD slots
 306          * If we are just about to create DIQ, the is_debug flag is not set yet
 307          * Hence we also check the type as well
 308          */
 309         if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
 310                 max_queues = dev->kfd->device_info.max_no_of_hqd/2;
 311
 312         if (pdd->qpd.queue_count >= max_queues)
 313                 return -ENOSPC;
 314
 315         if (q_data) {
 316                 retval = assign_queue_slot_by_qid(pqm, q_data->q_id);
 317                 *qid = q_data->q_id;
 318         } else
 319                 retval = find_available_queue_slot(pqm, qid);
 320
 321         if (retval != 0)
 322                 return retval;
 323
 324         if (list_empty(&pdd->qpd.queues_list) &&
 325             list_empty(&pdd->qpd.priv_queue_list))
 326                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 327
 328         pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 329         if (!pqn) {
 330                 retval = -ENOMEM;
 331                 goto err_allocate_pqn;
 332         }
 333
 334         switch (type) {
 335         case KFD_QUEUE_TYPE_SDMA:
 336         case KFD_QUEUE_TYPE_SDMA_XGMI:
 337                 /* SDMA queues are always allocated statically no matter
 338                  * which scheduler mode is used. We also do not need to
 339                  * check whether a SDMA queue can be allocated here, because
 340                  * allocate_sdma_queue() in create_queue() has the
 341                  * corresponding check logic.
 342                  */
 343                 retval = init_user_queue(pqm, dev, &q, properties, f, wptr_bo, *qid);
 344                 if (retval != 0)
 345                         goto err_create_queue;
 346                 pqn->q = q;
 347                 pqn->kq = NULL;
 348                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
 349                                                     restore_mqd, restore_ctl_stack);
 350                 print_queue(q);
 351                 break;
 352
 353         case KFD_QUEUE_TYPE_COMPUTE:
 354                 /* check if there is over subscription */
 355                 if ((dev->dqm->sched_policy ==
 356                      KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 357                 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 358                 (dev->dqm->active_queue_count >= get_cp_queues_num(dev->dqm)))) {
 359                         pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
 360                         retval = -EPERM;
 361                         goto err_create_queue;
 362                 }
 363
 364                 retval = init_user_queue(pqm, dev, &q, properties, f, wptr_bo, *qid);
 365                 if (retval != 0)
 366                         goto err_create_queue;
 367                 pqn->q = q;
 368                 pqn->kq = NULL;
 369                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
 370                                                     restore_mqd, restore_ctl_stack);
 371                 print_queue(q);
 372                 break;
 373         case KFD_QUEUE_TYPE_DIQ:
 374                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 375                 if (!kq) {
 376                         retval = -ENOMEM;
 377                         goto err_create_queue;
 378                 }
 379                 kq->queue->properties.queue_id = *qid;
 380                 pqn->kq = kq;
 381                 pqn->q = NULL;
 382                 retval = kfd_process_drain_interrupts(pdd);
 383                 if (retval)
 384                         break;
 385
 386                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 387                                                         kq, &pdd->qpd);
 388                 break;
 389         default:
 390                 WARN(1, "Invalid queue type %d", type);
 391                 retval = -EINVAL;
 392         }
 393
 394         if (retval != 0) {
 395                 pr_err("Pasid 0x%x DQM create queue type %d failed. ret %d\n",
 396                         pqm->process->pasid, type, retval);
 397                 goto err_create_queue;
 398         }
 399
 400         if (q && p_doorbell_offset_in_process) {
 401                 /* Return the doorbell offset within the doorbell page
 402                  * to the caller so it can be passed up to user mode
 403                  * (in bytes).
 404                  * relative doorbell index = Absolute doorbell index -
 405                  * absolute index of first doorbell in the page.
 406                  */
 407                 uint32_t first_db_index = amdgpu_doorbell_index_on_bar(pdd->dev->adev,
 408                                                                        pdd->qpd.proc_doorbells,
 409                                                                        0,
 410                                                                        pdd->dev->kfd->device_info.doorbell_size);
 411
 412                 *p_doorbell_offset_in_process = (q->properties.doorbell_off
 413                                                 - first_db_index) * sizeof(uint32_t);
 414         }
 415
 416         pr_debug("PQM After DQM create queue\n");
 417
 418         list_add(&pqn->process_queue_list, &pqm->queues);
 419
 420         if (q) {
 421                 pr_debug("PQM done creating queue\n");
 422                 kfd_procfs_add_queue(q);
 423                 print_queue_properties(&q->properties);
 424         }
 425
 426         return retval;
 427
 428 err_create_queue:
 429         uninit_queue(q);
 430         if (kq)
 431                 kernel_queue_uninit(kq, false);
 432         kfree(pqn);
 433 err_allocate_pqn:
 434         /* check if queues list is empty unregister process from device */
 435         clear_bit(*qid, pqm->queue_slot_bitmap);
 436         if (list_empty(&pdd->qpd.queues_list) &&
 437             list_empty(&pdd->qpd.priv_queue_list))
 438                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 439         return retval;
 440 }
 441
 442 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 443 {
 444         struct process_queue_node *pqn;
 445         struct kfd_process_device *pdd;
 446         struct device_queue_manager *dqm;
 447         struct kfd_node *dev;
 448         int retval;
 449
 450         dqm = NULL;
 451
 452         retval = 0;
 453
 454         pqn = get_queue_by_qid(pqm, qid);
 455         if (!pqn) {
 456                 pr_err("Queue id does not match any known queue\n");
 457                 return -EINVAL;
 458         }
 459
 460         dev = NULL;
 461         if (pqn->kq)
 462                 dev = pqn->kq->dev;
 463         if (pqn->q)
 464                 dev = pqn->q->device;
 465         if (WARN_ON(!dev))
 466                 return -ENODEV;
 467
 468         pdd = kfd_get_process_device_data(dev, pqm->process);
 469         if (!pdd) {
 470                 pr_err("Process device data doesn't exist\n");
 471                 return -1;
 472         }
 473
 474         if (pqn->kq) {
 475                 /* destroy kernel queue (DIQ) */
 476                 dqm = pqn->kq->dev->dqm;
 477                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 478                 kernel_queue_uninit(pqn->kq, false);
 479         }
 480
 481         if (pqn->q) {
 482                 kfd_procfs_del_queue(pqn->q);
 483                 dqm = pqn->q->device->dqm;
 484                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 485                 if (retval) {
 486                         pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n",
 487                                 pqm->process->pasid,
 488                                 pqn->q->properties.queue_id, retval);
 489                         if (retval != -ETIME)
 490                                 goto err_destroy_queue;
 491                 }
 492
 493                 pqm_clean_queue_resource(pqm, pqn);
 494                 uninit_queue(pqn->q);
 495         }
 496
 497         list_del(&pqn->process_queue_list);
 498         kfree(pqn);
 499         clear_bit(qid, pqm->queue_slot_bitmap);
 500
 501         if (list_empty(&pdd->qpd.queues_list) &&
 502             list_empty(&pdd->qpd.priv_queue_list))
 503                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 504
 505 err_destroy_queue:
 506         return retval;
 507 }
 508
 509 int pqm_update_queue_properties(struct process_queue_manager *pqm,
 510                                 unsigned int qid, struct queue_properties *p)
 511 {
 512         int retval;
 513         struct process_queue_node *pqn;
 514
 515         pqn = get_queue_by_qid(pqm, qid);
 516         if (!pqn) {
 517                 pr_debug("No queue %d exists for update operation\n", qid);
 518                 return -EFAULT;
 519         }
 520
 521         pqn->q->properties.queue_address = p->queue_address;
 522         pqn->q->properties.queue_size = p->queue_size;
 523         pqn->q->properties.queue_percent = p->queue_percent;
 524         pqn->q->properties.priority = p->priority;
 525         pqn->q->properties.pm4_target_xcc = p->pm4_target_xcc;
 526
 527         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 528                                                         pqn->q, NULL);
 529         if (retval != 0)
 530                 return retval;
 531
 532         return 0;
 533 }
 534
 535 int pqm_update_mqd(struct process_queue_manager *pqm,
 536                                 unsigned int qid, struct mqd_update_info *minfo)
 537 {
 538         int retval;
 539         struct process_queue_node *pqn;
 540
 541         pqn = get_queue_by_qid(pqm, qid);
 542         if (!pqn) {
 543                 pr_debug("No queue %d exists for update operation\n", qid);
 544                 return -EFAULT;
 545         }
 546
 547         /* CUs are masked for debugger requirements so deny user mask  */
 548         if (pqn->q->properties.is_dbg_wa && minfo && minfo->cu_mask.ptr)
 549                 return -EBUSY;
 550
 551         /* ASICs that have WGPs must enforce pairwise enabled mask checks. */
 552         if (minfo && minfo->cu_mask.ptr &&
 553                         KFD_GC_VERSION(pqn->q->device) >= IP_VERSION(10, 0, 0)) {
 554                 int i;
 555
 556                 for (i = 0; i < minfo->cu_mask.count; i += 2) {
 557                         uint32_t cu_pair = (minfo->cu_mask.ptr[i / 32] >> (i % 32)) & 0x3;
 558
 559                         if (cu_pair && cu_pair != 0x3) {
 560                                 pr_debug("CUs must be adjacent pairwise enabled.\n");
 561                                 return -EINVAL;
 562                         }
 563                 }
 564         }
 565
 566         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 567                                                         pqn->q, minfo);
 568         if (retval != 0)
 569                 return retval;
 570
 571         if (minfo && minfo->cu_mask.ptr)
 572                 pqn->q->properties.is_user_cu_masked = true;
 573
 574         return 0;
 575 }
 576
 577 struct kernel_queue *pqm_get_kernel_queue(
 578                                         struct process_queue_manager *pqm,
 579                                         unsigned int qid)
 580 {
 581         struct process_queue_node *pqn;
 582
 583         pqn = get_queue_by_qid(pqm, qid);
 584         if (pqn && pqn->kq)
 585                 return pqn->kq;
 586
 587         return NULL;
 588 }
 589
 590 struct queue *pqm_get_user_queue(struct process_queue_manager *pqm,
 591                                         unsigned int qid)
 592 {
 593         struct process_queue_node *pqn;
 594
 595         pqn = get_queue_by_qid(pqm, qid);
 596         return pqn ? pqn->q : NULL;
 597 }
 598
 599 int pqm_get_wave_state(struct process_queue_manager *pqm,
 600                        unsigned int qid,
 601                        void __user *ctl_stack,
 602                        u32 *ctl_stack_used_size,
 603                        u32 *save_area_used_size)
 604 {
 605         struct process_queue_node *pqn;
 606
 607         pqn = get_queue_by_qid(pqm, qid);
 608         if (!pqn) {
 609                 pr_debug("amdkfd: No queue %d exists for operation\n",
 610                          qid);
 611                 return -EFAULT;
 612         }
 613
 614         return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
 615                                                        pqn->q,
 616                                                        ctl_stack,
 617                                                        ctl_stack_used_size,
 618                                                        save_area_used_size);
 619 }
 620
 621 int pqm_get_queue_snapshot(struct process_queue_manager *pqm,
 622                            uint64_t exception_clear_mask,
 623                            void __user *buf,
 624                            int *num_qss_entries,
 625                            uint32_t *entry_size)
 626 {
 627         struct process_queue_node *pqn;
 628         struct kfd_queue_snapshot_entry src;
 629         uint32_t tmp_entry_size = *entry_size, tmp_qss_entries = *num_qss_entries;
 630         int r = 0;
 631
 632         *num_qss_entries = 0;
 633         if (!(*entry_size))
 634                 return -EINVAL;
 635
 636         *entry_size = min_t(size_t, *entry_size, sizeof(struct kfd_queue_snapshot_entry));
 637         mutex_lock(&pqm->process->event_mutex);
 638
 639         memset(&src, 0, sizeof(src));
 640
 641         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 642                 if (!pqn->q)
 643                         continue;
 644
 645                 if (*num_qss_entries < tmp_qss_entries) {
 646                         set_queue_snapshot_entry(pqn->q, exception_clear_mask, &src);
 647
 648                         if (copy_to_user(buf, &src, *entry_size)) {
 649                                 r = -EFAULT;
 650                                 break;
 651                         }
 652                         buf += tmp_entry_size;
 653                 }
 654                 *num_qss_entries += 1;
 655         }
 656
 657         mutex_unlock(&pqm->process->event_mutex);
 658         return r;
 659 }
 660
 661 static int get_queue_data_sizes(struct kfd_process_device *pdd,
 662                                 struct queue *q,
 663                                 uint32_t *mqd_size,
 664                                 uint32_t *ctl_stack_size)
 665 {
 666         int ret;
 667
 668         ret = pqm_get_queue_checkpoint_info(&pdd->process->pqm,
 669                                             q->properties.queue_id,
 670                                             mqd_size,
 671                                             ctl_stack_size);
 672         if (ret)
 673                 pr_err("Failed to get queue dump info (%d)\n", ret);
 674
 675         return ret;
 676 }
 677
 678 int kfd_process_get_queue_info(struct kfd_process *p,
 679                                uint32_t *num_queues,
 680                                uint64_t *priv_data_sizes)
 681 {
 682         uint32_t extra_data_sizes = 0;
 683         struct queue *q;
 684         int i;
 685         int ret;
 686
 687         *num_queues = 0;
 688
 689         /* Run over all PDDs of the process */
 690         for (i = 0; i < p->n_pdds; i++) {
 691                 struct kfd_process_device *pdd = p->pdds[i];
 692
 693                 list_for_each_entry(q, &pdd->qpd.queues_list, list) {
 694                         if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
 695                                 q->properties.type == KFD_QUEUE_TYPE_SDMA ||
 696                                 q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
 697                                 uint32_t mqd_size, ctl_stack_size;
 698
 699                                 *num_queues = *num_queues + 1;
 700
 701                                 ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
 702                                 if (ret)
 703                                         return ret;
 704
 705                                 extra_data_sizes += mqd_size + ctl_stack_size;
 706                         } else {
 707                                 pr_err("Unsupported queue type (%d)\n", q->properties.type);
 708                                 return -EOPNOTSUPP;
 709                         }
 710                 }
 711         }
 712         *priv_data_sizes = extra_data_sizes +
 713                                 (*num_queues * sizeof(struct kfd_criu_queue_priv_data));
 714
 715         return 0;
 716 }
 717
 718 static int pqm_checkpoint_mqd(struct process_queue_manager *pqm,
 719                               unsigned int qid,
 720                               void *mqd,
 721                               void *ctl_stack)
 722 {
 723         struct process_queue_node *pqn;
 724
 725         pqn = get_queue_by_qid(pqm, qid);
 726         if (!pqn) {
 727                 pr_debug("amdkfd: No queue %d exists for operation\n", qid);
 728                 return -EFAULT;
 729         }
 730
 731         if (!pqn->q->device->dqm->ops.checkpoint_mqd) {
 732                 pr_err("amdkfd: queue dumping not supported on this device\n");
 733                 return -EOPNOTSUPP;
 734         }
 735
 736         return pqn->q->device->dqm->ops.checkpoint_mqd(pqn->q->device->dqm,
 737                                                        pqn->q, mqd, ctl_stack);
 738 }
 739
 740 static int criu_checkpoint_queue(struct kfd_process_device *pdd,
 741                            struct queue *q,
 742                            struct kfd_criu_queue_priv_data *q_data)
 743 {
 744         uint8_t *mqd, *ctl_stack;
 745         int ret;
 746
 747         mqd = (void *)(q_data + 1);
 748         ctl_stack = mqd + q_data->mqd_size;
 749
 750         q_data->gpu_id = pdd->user_gpu_id;
 751         q_data->type = q->properties.type;
 752         q_data->format = q->properties.format;
 753         q_data->q_id =  q->properties.queue_id;
 754         q_data->q_address = q->properties.queue_address;
 755         q_data->q_size = q->properties.queue_size;
 756         q_data->priority = q->properties.priority;
 757         q_data->q_percent = q->properties.queue_percent;
 758         q_data->read_ptr_addr = (uint64_t)q->properties.read_ptr;
 759         q_data->write_ptr_addr = (uint64_t)q->properties.write_ptr;
 760         q_data->doorbell_id = q->doorbell_id;
 761
 762         q_data->sdma_id = q->sdma_id;
 763
 764         q_data->eop_ring_buffer_address =
 765                 q->properties.eop_ring_buffer_address;
 766
 767         q_data->eop_ring_buffer_size = q->properties.eop_ring_buffer_size;
 768
 769         q_data->ctx_save_restore_area_address =
 770                 q->properties.ctx_save_restore_area_address;
 771
 772         q_data->ctx_save_restore_area_size =
 773                 q->properties.ctx_save_restore_area_size;
 774
 775         q_data->gws = !!q->gws;
 776
 777         ret = pqm_checkpoint_mqd(&pdd->process->pqm, q->properties.queue_id, mqd, ctl_stack);
 778         if (ret) {
 779                 pr_err("Failed checkpoint queue_mqd (%d)\n", ret);
 780                 return ret;
 781         }
 782
 783         pr_debug("Dumping Queue: gpu_id:%x queue_id:%u\n", q_data->gpu_id, q_data->q_id);
 784         return ret;
 785 }
 786
 787 static int criu_checkpoint_queues_device(struct kfd_process_device *pdd,
 788                                    uint8_t __user *user_priv,
 789                                    unsigned int *q_index,
 790                                    uint64_t *queues_priv_data_offset)
 791 {
 792         unsigned int q_private_data_size = 0;
 793         uint8_t *q_private_data = NULL; /* Local buffer to store individual queue private data */
 794         struct queue *q;
 795         int ret = 0;
 796
 797         list_for_each_entry(q, &pdd->qpd.queues_list, list) {
 798                 struct kfd_criu_queue_priv_data *q_data;
 799                 uint64_t q_data_size;
 800                 uint32_t mqd_size;
 801                 uint32_t ctl_stack_size;
 802
 803                 if (q->properties.type != KFD_QUEUE_TYPE_COMPUTE &&
 804                         q->properties.type != KFD_QUEUE_TYPE_SDMA &&
 805                         q->properties.type != KFD_QUEUE_TYPE_SDMA_XGMI) {
 806
 807                         pr_err("Unsupported queue type (%d)\n", q->properties.type);
 808                         ret = -EOPNOTSUPP;
 809                         break;
 810                 }
 811
 812                 ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
 813                 if (ret)
 814                         break;
 815
 816                 q_data_size = sizeof(*q_data) + mqd_size + ctl_stack_size;
 817
 818                 /* Increase local buffer space if needed */
 819                 if (q_private_data_size < q_data_size) {
 820                         kfree(q_private_data);
 821
 822                         q_private_data = kzalloc(q_data_size, GFP_KERNEL);
 823                         if (!q_private_data) {
 824                                 ret = -ENOMEM;
 825                                 break;
 826                         }
 827                         q_private_data_size = q_data_size;
 828                 }
 829
 830                 q_data = (struct kfd_criu_queue_priv_data *)q_private_data;
 831
 832                 /* data stored in this order: priv_data, mqd, ctl_stack */
 833                 q_data->mqd_size = mqd_size;
 834                 q_data->ctl_stack_size = ctl_stack_size;
 835
 836                 ret = criu_checkpoint_queue(pdd, q, q_data);
 837                 if (ret)
 838                         break;
 839
 840                 q_data->object_type = KFD_CRIU_OBJECT_TYPE_QUEUE;
 841
 842                 ret = copy_to_user(user_priv + *queues_priv_data_offset,
 843                                 q_data, q_data_size);
 844                 if (ret) {
 845                         ret = -EFAULT;
 846                         break;
 847                 }
 848                 *queues_priv_data_offset += q_data_size;
 849                 *q_index = *q_index + 1;
 850         }
 851
 852         kfree(q_private_data);
 853
 854         return ret;
 855 }
 856
 857 int kfd_criu_checkpoint_queues(struct kfd_process *p,
 858                          uint8_t __user *user_priv_data,
 859                          uint64_t *priv_data_offset)
 860 {
 861         int ret = 0, pdd_index, q_index = 0;
 862
 863         for (pdd_index = 0; pdd_index < p->n_pdds; pdd_index++) {
 864                 struct kfd_process_device *pdd = p->pdds[pdd_index];
 865
 866                 /*
 867                  * criu_checkpoint_queues_device will copy data to user and update q_index and
 868                  * queues_priv_data_offset
 869                  */
 870                 ret = criu_checkpoint_queues_device(pdd, user_priv_data, &q_index,
 871                                               priv_data_offset);
 872
 873                 if (ret)
 874                         break;
 875         }
 876
 877         return ret;
 878 }
 879
 880 static void set_queue_properties_from_criu(struct queue_properties *qp,
 881                                           struct kfd_criu_queue_priv_data *q_data)
 882 {
 883         qp->is_interop = false;
 884         qp->queue_percent = q_data->q_percent;
 885         qp->priority = q_data->priority;
 886         qp->queue_address = q_data->q_address;
 887         qp->queue_size = q_data->q_size;
 888         qp->read_ptr = (uint32_t *) q_data->read_ptr_addr;
 889         qp->write_ptr = (uint32_t *) q_data->write_ptr_addr;
 890         qp->eop_ring_buffer_address = q_data->eop_ring_buffer_address;
 891         qp->eop_ring_buffer_size = q_data->eop_ring_buffer_size;
 892         qp->ctx_save_restore_area_address = q_data->ctx_save_restore_area_address;
 893         qp->ctx_save_restore_area_size = q_data->ctx_save_restore_area_size;
 894         qp->ctl_stack_size = q_data->ctl_stack_size;
 895         qp->type = q_data->type;
 896         qp->format = q_data->format;
 897 }
 898
 899 int kfd_criu_restore_queue(struct kfd_process *p,
 900                            uint8_t __user *user_priv_ptr,
 901                            uint64_t *priv_data_offset,
 902                            uint64_t max_priv_data_size)
 903 {
 904         uint8_t *mqd, *ctl_stack, *q_extra_data = NULL;
 905         struct kfd_criu_queue_priv_data *q_data;
 906         struct kfd_process_device *pdd;
 907         uint64_t q_extra_data_size;
 908         struct queue_properties qp;
 909         unsigned int queue_id;
 910         int ret = 0;
 911
 912         if (*priv_data_offset + sizeof(*q_data) > max_priv_data_size)
 913                 return -EINVAL;
 914
 915         q_data = kmalloc(sizeof(*q_data), GFP_KERNEL);
 916         if (!q_data)
 917                 return -ENOMEM;
 918
 919         ret = copy_from_user(q_data, user_priv_ptr + *priv_data_offset, sizeof(*q_data));
 920         if (ret) {
 921                 ret = -EFAULT;
 922                 goto exit;
 923         }
 924
 925         *priv_data_offset += sizeof(*q_data);
 926         q_extra_data_size = (uint64_t)q_data->ctl_stack_size + q_data->mqd_size;
 927
 928         if (*priv_data_offset + q_extra_data_size > max_priv_data_size) {
 929                 ret = -EINVAL;
 930                 goto exit;
 931         }
 932
 933         q_extra_data = kmalloc(q_extra_data_size, GFP_KERNEL);
 934         if (!q_extra_data) {
 935                 ret = -ENOMEM;
 936                 goto exit;
 937         }
 938
 939         ret = copy_from_user(q_extra_data, user_priv_ptr + *priv_data_offset, q_extra_data_size);
 940         if (ret) {
 941                 ret = -EFAULT;
 942                 goto exit;
 943         }
 944
 945         *priv_data_offset += q_extra_data_size;
 946
 947         pdd = kfd_process_device_data_by_id(p, q_data->gpu_id);
 948         if (!pdd) {
 949                 pr_err("Failed to get pdd\n");
 950                 ret = -EINVAL;
 951                 goto exit;
 952         }
 953
 954         /* data stored in this order: mqd, ctl_stack */
 955         mqd = q_extra_data;
 956         ctl_stack = mqd + q_data->mqd_size;
 957
 958         memset(&qp, 0, sizeof(qp));
 959         set_queue_properties_from_criu(&qp, q_data);
 960
 961         print_queue_properties(&qp);
 962
 963         ret = pqm_create_queue(&p->pqm, pdd->dev, NULL, &qp, &queue_id, NULL, q_data, mqd, ctl_stack,
 964                                 NULL);
 965         if (ret) {
 966                 pr_err("Failed to create new queue err:%d\n", ret);
 967                 goto exit;
 968         }
 969
 970         if (q_data->gws)
 971                 ret = pqm_set_gws(&p->pqm, q_data->q_id, pdd->dev->gws);
 972
 973 exit:
 974         if (ret)
 975                 pr_err("Failed to restore queue (%d)\n", ret);
 976         else
 977                 pr_debug("Queue id %d was restored successfully\n", queue_id);
 978
 979         kfree(q_data);
 980
 981         return ret;
 982 }
 983
 984 int pqm_get_queue_checkpoint_info(struct process_queue_manager *pqm,
 985                                   unsigned int qid,
 986                                   uint32_t *mqd_size,
 987                                   uint32_t *ctl_stack_size)
 988 {
 989         struct process_queue_node *pqn;
 990
 991         pqn = get_queue_by_qid(pqm, qid);
 992         if (!pqn) {
 993                 pr_debug("amdkfd: No queue %d exists for operation\n", qid);
 994                 return -EFAULT;
 995         }
 996
 997         if (!pqn->q->device->dqm->ops.get_queue_checkpoint_info) {
 998                 pr_err("amdkfd: queue dumping not supported on this device\n");
 999                 return -EOPNOTSUPP;
1000         }
1001
1002         pqn->q->device->dqm->ops.get_queue_checkpoint_info(pqn->q->device->dqm,
1003                                                        pqn->q, mqd_size,
1004                                                        ctl_stack_size);
1005         return 0;
1006 }
1007
1008 #if defined(CONFIG_DEBUG_FS)
1009
1010 int pqm_debugfs_mqds(struct seq_file *m, void *data)
1011 {
1012         struct process_queue_manager *pqm = data;
1013         struct process_queue_node *pqn;
1014         struct queue *q;
1015         enum KFD_MQD_TYPE mqd_type;
1016         struct mqd_manager *mqd_mgr;
1017         int r = 0, xcc, num_xccs = 1;
1018         void *mqd;
1019         uint64_t size = 0;
1020
1021         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
1022                 if (pqn->q) {
1023                         q = pqn->q;
1024                         switch (q->properties.type) {
1025                         case KFD_QUEUE_TYPE_SDMA:
1026                         case KFD_QUEUE_TYPE_SDMA_XGMI:
1027                                 seq_printf(m, "  SDMA queue on device %x\n",
1028                                            q->device->id);
1029                                 mqd_type = KFD_MQD_TYPE_SDMA;
1030                                 break;
1031                         case KFD_QUEUE_TYPE_COMPUTE:
1032                                 seq_printf(m, "  Compute queue on device %x\n",
1033                                            q->device->id);
1034                                 mqd_type = KFD_MQD_TYPE_CP;
1035                                 num_xccs = NUM_XCC(q->device->xcc_mask);
1036                                 break;
1037                         default:
1038                                 seq_printf(m,
1039                                 "  Bad user queue type %d on device %x\n",
1040                                            q->properties.type, q->device->id);
1041                                 continue;
1042                         }
1043                         mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
1044                         size = mqd_mgr->mqd_stride(mqd_mgr,
1045                                                         &q->properties);
1046                 } else if (pqn->kq) {
1047                         q = pqn->kq->queue;
1048                         mqd_mgr = pqn->kq->mqd_mgr;
1049                         switch (q->properties.type) {
1050                         case KFD_QUEUE_TYPE_DIQ:
1051                                 seq_printf(m, "  DIQ on device %x\n",
1052                                            pqn->kq->dev->id);
1053                                 break;
1054                         default:
1055                                 seq_printf(m,
1056                                 "  Bad kernel queue type %d on device %x\n",
1057                                            q->properties.type,
1058                                            pqn->kq->dev->id);
1059                                 continue;
1060                         }
1061                 } else {
1062                         seq_printf(m,
1063                 "  Weird: Queue node with neither kernel nor user queue\n");
1064                         continue;
1065                 }
1066
1067                 for (xcc = 0; xcc < num_xccs; xcc++) {
1068                         mqd = q->mqd + size * xcc;
1069                         r = mqd_mgr->debugfs_show_mqd(m, mqd);
1070                         if (r != 0)
1071                                 break;
1072                 }
1073         }
1074
1075         return r;
1076 }
1077
1078 #endif