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

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