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

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23
  24 #include <linux/slab.h>
  25 #include <linux/list.h>
  26 #include "kfd_device_queue_manager.h"
  27 #include "kfd_priv.h"
  28 #include "kfd_kernel_queue.h"
  29 #include "amdgpu_amdkfd.h"
  30
  31 static inline struct process_queue_node *get_queue_by_qid(
  32                         struct process_queue_manager *pqm, unsigned int qid)
  33 {
  34         struct process_queue_node *pqn;
  35
  36         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
  37                 if ((pqn->q && pqn->q->properties.queue_id == qid) ||
  38                     (pqn->kq && pqn->kq->queue->properties.queue_id == qid))
  39                         return pqn;
  40         }
  41
  42         return NULL;
  43 }
  44
  45 static int find_available_queue_slot(struct process_queue_manager *pqm,
  46                                         unsigned int *qid)
  47 {
  48         unsigned long found;
  49
  50         found = find_first_zero_bit(pqm->queue_slot_bitmap,
  51                         KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
  52
  53         pr_debug("The new slot id %lu\n", found);
  54
  55         if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
  56                 pr_info("Cannot open more queues for process with pasid 0x%x\n",
  57                                 pqm->process->pasid);
  58                 return -ENOMEM;
  59         }
  60
  61         set_bit(found, pqm->queue_slot_bitmap);
  62         *qid = found;
  63
  64         return 0;
  65 }
  66
  67 void kfd_process_dequeue_from_device(struct kfd_process_device *pdd)
  68 {
  69         struct kfd_dev *dev = pdd->dev;
  70
  71         if (pdd->already_dequeued)
  72                 return;
  73
  74         dev->dqm->ops.process_termination(dev->dqm, &pdd->qpd);
  75         pdd->already_dequeued = true;
  76 }
  77
  78 int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid,
  79                         void *gws)
  80 {
  81         struct kfd_dev *dev = NULL;
  82         struct process_queue_node *pqn;
  83         struct kfd_process_device *pdd;
  84         struct kgd_mem *mem = NULL;
  85         int ret;
  86
  87         pqn = get_queue_by_qid(pqm, qid);
  88         if (!pqn) {
  89                 pr_err("Queue id does not match any known queue\n");
  90                 return -EINVAL;
  91         }
  92
  93         if (pqn->q)
  94                 dev = pqn->q->device;
  95         if (WARN_ON(!dev))
  96                 return -ENODEV;
  97
  98         pdd = kfd_get_process_device_data(dev, pqm->process);
  99         if (!pdd) {
 100                 pr_err("Process device data doesn't exist\n");
 101                 return -EINVAL;
 102         }
 103
 104         /* Only allow one queue per process can have GWS assigned */
 105         if (gws && pdd->qpd.num_gws)
 106                 return -EBUSY;
 107
 108         if (!gws && pdd->qpd.num_gws == 0)
 109                 return -EINVAL;
 110
 111         if (gws)
 112                 ret = amdgpu_amdkfd_add_gws_to_process(pdd->process->kgd_process_info,
 113                         gws, &mem);
 114         else
 115                 ret = amdgpu_amdkfd_remove_gws_from_process(pdd->process->kgd_process_info,
 116                         pqn->q->gws);
 117         if (unlikely(ret))
 118                 return ret;
 119
 120         pqn->q->gws = mem;
 121         pdd->qpd.num_gws = gws ? amdgpu_amdkfd_get_num_gws(dev->kgd) : 0;
 122
 123         return pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 124                                                         pqn->q);
 125 }
 126
 127 void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
 128 {
 129         int i;
 130
 131         for (i = 0; i < p->n_pdds; i++)
 132                 kfd_process_dequeue_from_device(p->pdds[i]);
 133 }
 134
 135 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
 136 {
 137         INIT_LIST_HEAD(&pqm->queues);
 138         pqm->queue_slot_bitmap =
 139                         kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
 140                                         BITS_PER_BYTE), GFP_KERNEL);
 141         if (!pqm->queue_slot_bitmap)
 142                 return -ENOMEM;
 143         pqm->process = p;
 144
 145         return 0;
 146 }
 147
 148 void pqm_uninit(struct process_queue_manager *pqm)
 149 {
 150         struct process_queue_node *pqn, *next;
 151
 152         list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
 153                 if (pqn->q && pqn->q->gws)
 154                         amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
 155                                 pqn->q->gws);
 156                 kfd_procfs_del_queue(pqn->q);
 157                 uninit_queue(pqn->q);
 158                 list_del(&pqn->process_queue_list);
 159                 kfree(pqn);
 160         }
 161
 162         kfree(pqm->queue_slot_bitmap);
 163         pqm->queue_slot_bitmap = NULL;
 164 }
 165
 166 static int init_user_queue(struct process_queue_manager *pqm,
 167                                 struct kfd_dev *dev, struct queue **q,
 168                                 struct queue_properties *q_properties,
 169                                 struct file *f, unsigned int qid)
 170 {
 171         int retval;
 172
 173         /* Doorbell initialized in user space*/
 174         q_properties->doorbell_ptr = NULL;
 175
 176         /* let DQM handle it*/
 177         q_properties->vmid = 0;
 178         q_properties->queue_id = qid;
 179
 180         retval = init_queue(q, q_properties);
 181         if (retval != 0)
 182                 return retval;
 183
 184         (*q)->device = dev;
 185         (*q)->process = pqm->process;
 186
 187         pr_debug("PQM After init queue");
 188
 189         return retval;
 190 }
 191
 192 int pqm_create_queue(struct process_queue_manager *pqm,
 193                             struct kfd_dev *dev,
 194                             struct file *f,
 195                             struct queue_properties *properties,
 196                             unsigned int *qid,
 197                             uint32_t *p_doorbell_offset_in_process)
 198 {
 199         int retval;
 200         struct kfd_process_device *pdd;
 201         struct queue *q;
 202         struct process_queue_node *pqn;
 203         struct kernel_queue *kq;
 204         enum kfd_queue_type type = properties->type;
 205         unsigned int max_queues = 127; /* HWS limit */
 206
 207         q = NULL;
 208         kq = NULL;
 209
 210         pdd = kfd_get_process_device_data(dev, pqm->process);
 211         if (!pdd) {
 212                 pr_err("Process device data doesn't exist\n");
 213                 return -1;
 214         }
 215
 216         /*
 217          * for debug process, verify that it is within the static queues limit
 218          * currently limit is set to half of the total avail HQD slots
 219          * If we are just about to create DIQ, the is_debug flag is not set yet
 220          * Hence we also check the type as well
 221          */
 222         if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
 223                 max_queues = dev->device_info->max_no_of_hqd/2;
 224
 225         if (pdd->qpd.queue_count >= max_queues)
 226                 return -ENOSPC;
 227
 228         retval = find_available_queue_slot(pqm, qid);
 229         if (retval != 0)
 230                 return retval;
 231
 232         if (list_empty(&pdd->qpd.queues_list) &&
 233             list_empty(&pdd->qpd.priv_queue_list))
 234                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 235
 236         pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 237         if (!pqn) {
 238                 retval = -ENOMEM;
 239                 goto err_allocate_pqn;
 240         }
 241
 242         switch (type) {
 243         case KFD_QUEUE_TYPE_SDMA:
 244         case KFD_QUEUE_TYPE_SDMA_XGMI:
 245                 /* SDMA queues are always allocated statically no matter
 246                  * which scheduler mode is used. We also do not need to
 247                  * check whether a SDMA queue can be allocated here, because
 248                  * allocate_sdma_queue() in create_queue() has the
 249                  * corresponding check logic.
 250                  */
 251                 retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
 252                 if (retval != 0)
 253                         goto err_create_queue;
 254                 pqn->q = q;
 255                 pqn->kq = NULL;
 256                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 257                 print_queue(q);
 258                 break;
 259
 260         case KFD_QUEUE_TYPE_COMPUTE:
 261                 /* check if there is over subscription */
 262                 if ((dev->dqm->sched_policy ==
 263                      KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 264                 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 265                 (dev->dqm->active_queue_count >= get_cp_queues_num(dev->dqm)))) {
 266                         pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
 267                         retval = -EPERM;
 268                         goto err_create_queue;
 269                 }
 270
 271                 retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
 272                 if (retval != 0)
 273                         goto err_create_queue;
 274                 pqn->q = q;
 275                 pqn->kq = NULL;
 276                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 277                 print_queue(q);
 278                 break;
 279         case KFD_QUEUE_TYPE_DIQ:
 280                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 281                 if (!kq) {
 282                         retval = -ENOMEM;
 283                         goto err_create_queue;
 284                 }
 285                 kq->queue->properties.queue_id = *qid;
 286                 pqn->kq = kq;
 287                 pqn->q = NULL;
 288                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 289                                                         kq, &pdd->qpd);
 290                 break;
 291         default:
 292                 WARN(1, "Invalid queue type %d", type);
 293                 retval = -EINVAL;
 294         }
 295
 296         if (retval != 0) {
 297                 pr_err("Pasid 0x%x DQM create queue type %d failed. ret %d\n",
 298                         pqm->process->pasid, type, retval);
 299                 goto err_create_queue;
 300         }
 301
 302         if (q && p_doorbell_offset_in_process)
 303                 /* Return the doorbell offset within the doorbell page
 304                  * to the caller so it can be passed up to user mode
 305                  * (in bytes).
 306                  * There are always 1024 doorbells per process, so in case
 307                  * of 8-byte doorbells, there are two doorbell pages per
 308                  * process.
 309                  */
 310                 *p_doorbell_offset_in_process =
 311                         (q->properties.doorbell_off * sizeof(uint32_t)) &
 312                         (kfd_doorbell_process_slice(dev) - 1);
 313
 314         pr_debug("PQM After DQM create queue\n");
 315
 316         list_add(&pqn->process_queue_list, &pqm->queues);
 317
 318         if (q) {
 319                 pr_debug("PQM done creating queue\n");
 320                 kfd_procfs_add_queue(q);
 321                 print_queue_properties(&q->properties);
 322         }
 323
 324         return retval;
 325
 326 err_create_queue:
 327         uninit_queue(q);
 328         if (kq)
 329                 kernel_queue_uninit(kq, false);
 330         kfree(pqn);
 331 err_allocate_pqn:
 332         /* check if queues list is empty unregister process from device */
 333         clear_bit(*qid, pqm->queue_slot_bitmap);
 334         if (list_empty(&pdd->qpd.queues_list) &&
 335             list_empty(&pdd->qpd.priv_queue_list))
 336                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 337         return retval;
 338 }
 339
 340 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 341 {
 342         struct process_queue_node *pqn;
 343         struct kfd_process_device *pdd;
 344         struct device_queue_manager *dqm;
 345         struct kfd_dev *dev;
 346         int retval;
 347
 348         dqm = NULL;
 349
 350         retval = 0;
 351
 352         pqn = get_queue_by_qid(pqm, qid);
 353         if (!pqn) {
 354                 pr_err("Queue id does not match any known queue\n");
 355                 return -EINVAL;
 356         }
 357
 358         dev = NULL;
 359         if (pqn->kq)
 360                 dev = pqn->kq->dev;
 361         if (pqn->q)
 362                 dev = pqn->q->device;
 363         if (WARN_ON(!dev))
 364                 return -ENODEV;
 365
 366         pdd = kfd_get_process_device_data(dev, pqm->process);
 367         if (!pdd) {
 368                 pr_err("Process device data doesn't exist\n");
 369                 return -1;
 370         }
 371
 372         if (pqn->kq) {
 373                 /* destroy kernel queue (DIQ) */
 374                 dqm = pqn->kq->dev->dqm;
 375                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 376                 kernel_queue_uninit(pqn->kq, false);
 377         }
 378
 379         if (pqn->q) {
 380                 kfd_procfs_del_queue(pqn->q);
 381                 dqm = pqn->q->device->dqm;
 382                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 383                 if (retval) {
 384                         pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n",
 385                                 pqm->process->pasid,
 386                                 pqn->q->properties.queue_id, retval);
 387                         if (retval != -ETIME)
 388                                 goto err_destroy_queue;
 389                 }
 390
 391                 if (pqn->q->gws) {
 392                         amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
 393                                 pqn->q->gws);
 394                         pdd->qpd.num_gws = 0;
 395                 }
 396
 397                 kfree(pqn->q->properties.cu_mask);
 398                 pqn->q->properties.cu_mask = NULL;
 399                 uninit_queue(pqn->q);
 400         }
 401
 402         list_del(&pqn->process_queue_list);
 403         kfree(pqn);
 404         clear_bit(qid, pqm->queue_slot_bitmap);
 405
 406         if (list_empty(&pdd->qpd.queues_list) &&
 407             list_empty(&pdd->qpd.priv_queue_list))
 408                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 409
 410 err_destroy_queue:
 411         return retval;
 412 }
 413
 414 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 415                         struct queue_properties *p)
 416 {
 417         int retval;
 418         struct process_queue_node *pqn;
 419
 420         pqn = get_queue_by_qid(pqm, qid);
 421         if (!pqn) {
 422                 pr_debug("No queue %d exists for update operation\n", qid);
 423                 return -EFAULT;
 424         }
 425
 426         pqn->q->properties.queue_address = p->queue_address;
 427         pqn->q->properties.queue_size = p->queue_size;
 428         pqn->q->properties.queue_percent = p->queue_percent;
 429         pqn->q->properties.priority = p->priority;
 430
 431         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 432                                                         pqn->q);
 433         if (retval != 0)
 434                 return retval;
 435
 436         return 0;
 437 }
 438
 439 int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid,
 440                         struct queue_properties *p)
 441 {
 442         int retval;
 443         struct process_queue_node *pqn;
 444
 445         pqn = get_queue_by_qid(pqm, qid);
 446         if (!pqn) {
 447                 pr_debug("No queue %d exists for update operation\n", qid);
 448                 return -EFAULT;
 449         }
 450
 451         /* Free the old CU mask memory if it is already allocated, then
 452          * allocate memory for the new CU mask.
 453          */
 454         kfree(pqn->q->properties.cu_mask);
 455
 456         pqn->q->properties.cu_mask_count = p->cu_mask_count;
 457         pqn->q->properties.cu_mask = p->cu_mask;
 458
 459         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 460                                                         pqn->q);
 461         if (retval != 0)
 462                 return retval;
 463
 464         return 0;
 465 }
 466
 467 struct kernel_queue *pqm_get_kernel_queue(
 468                                         struct process_queue_manager *pqm,
 469                                         unsigned int qid)
 470 {
 471         struct process_queue_node *pqn;
 472
 473         pqn = get_queue_by_qid(pqm, qid);
 474         if (pqn && pqn->kq)
 475                 return pqn->kq;
 476
 477         return NULL;
 478 }
 479
 480 struct queue *pqm_get_user_queue(struct process_queue_manager *pqm,
 481                                         unsigned int qid)
 482 {
 483         struct process_queue_node *pqn;
 484
 485         pqn = get_queue_by_qid(pqm, qid);
 486         return pqn ? pqn->q : NULL;
 487 }
 488
 489 int pqm_get_wave_state(struct process_queue_manager *pqm,
 490                        unsigned int qid,
 491                        void __user *ctl_stack,
 492                        u32 *ctl_stack_used_size,
 493                        u32 *save_area_used_size)
 494 {
 495         struct process_queue_node *pqn;
 496
 497         pqn = get_queue_by_qid(pqm, qid);
 498         if (!pqn) {
 499                 pr_debug("amdkfd: No queue %d exists for operation\n",
 500                          qid);
 501                 return -EFAULT;
 502         }
 503
 504         return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
 505                                                        pqn->q,
 506                                                        ctl_stack,
 507                                                        ctl_stack_used_size,
 508                                                        save_area_used_size);
 509 }
 510
 511 #if defined(CONFIG_DEBUG_FS)
 512
 513 int pqm_debugfs_mqds(struct seq_file *m, void *data)
 514 {
 515         struct process_queue_manager *pqm = data;
 516         struct process_queue_node *pqn;
 517         struct queue *q;
 518         enum KFD_MQD_TYPE mqd_type;
 519         struct mqd_manager *mqd_mgr;
 520         int r = 0;
 521
 522         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 523                 if (pqn->q) {
 524                         q = pqn->q;
 525                         switch (q->properties.type) {
 526                         case KFD_QUEUE_TYPE_SDMA:
 527                         case KFD_QUEUE_TYPE_SDMA_XGMI:
 528                                 seq_printf(m, "  SDMA queue on device %x\n",
 529                                            q->device->id);
 530                                 mqd_type = KFD_MQD_TYPE_SDMA;
 531                                 break;
 532                         case KFD_QUEUE_TYPE_COMPUTE:
 533                                 seq_printf(m, "  Compute queue on device %x\n",
 534                                            q->device->id);
 535                                 mqd_type = KFD_MQD_TYPE_CP;
 536                                 break;
 537                         default:
 538                                 seq_printf(m,
 539                                 "  Bad user queue type %d on device %x\n",
 540                                            q->properties.type, q->device->id);
 541                                 continue;
 542                         }
 543                         mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
 544                 } else if (pqn->kq) {
 545                         q = pqn->kq->queue;
 546                         mqd_mgr = pqn->kq->mqd_mgr;
 547                         switch (q->properties.type) {
 548                         case KFD_QUEUE_TYPE_DIQ:
 549                                 seq_printf(m, "  DIQ on device %x\n",
 550                                            pqn->kq->dev->id);
 551                                 break;
 552                         default:
 553                                 seq_printf(m,
 554                                 "  Bad kernel queue type %d on device %x\n",
 555                                            q->properties.type,
 556                                            pqn->kq->dev->id);
 557                                 continue;
 558                         }
 559                 } else {
 560                         seq_printf(m,
 561                 "  Weird: Queue node with neither kernel nor user queue\n");
 562                         continue;
 563                 }
 564
 565                 r = mqd_mgr->debugfs_show_mqd(m, q->mqd);
 566                 if (r != 0)
 567                         break;
 568         }
 569
 570         return r;
 571 }
 572
 573 #endif