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         struct kfd_process_device *pdd;
 130
 131         list_for_each_entry(pdd, &p->per_device_data, per_device_list)
 132                 kfd_process_dequeue_from_device(pdd);
 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                 uninit_queue(pqn->q);
 157                 list_del(&pqn->process_queue_list);
 158                 kfree(pqn);
 159         }
 160
 161         kfree(pqm->queue_slot_bitmap);
 162         pqm->queue_slot_bitmap = NULL;
 163 }
 164
 165 static int init_user_queue(struct process_queue_manager *pqm,
 166                                 struct kfd_dev *dev, struct queue **q,
 167                                 struct queue_properties *q_properties,
 168                                 struct file *f, unsigned int qid)
 169 {
 170         int retval;
 171
 172         /* Doorbell initialized in user space*/
 173         q_properties->doorbell_ptr = NULL;
 174
 175         /* let DQM handle it*/
 176         q_properties->vmid = 0;
 177         q_properties->queue_id = qid;
 178
 179         retval = init_queue(q, q_properties);
 180         if (retval != 0)
 181                 return retval;
 182
 183         (*q)->device = dev;
 184         (*q)->process = pqm->process;
 185
 186         pr_debug("PQM After init queue");
 187
 188         return retval;
 189 }
 190
 191 int pqm_create_queue(struct process_queue_manager *pqm,
 192                             struct kfd_dev *dev,
 193                             struct file *f,
 194                             struct queue_properties *properties,
 195                             unsigned int *qid,
 196                             uint32_t *p_doorbell_offset_in_process)
 197 {
 198         int retval;
 199         struct kfd_process_device *pdd;
 200         struct queue *q;
 201         struct process_queue_node *pqn;
 202         struct kernel_queue *kq;
 203         enum kfd_queue_type type = properties->type;
 204         unsigned int max_queues = 127; /* HWS limit */
 205
 206         q = NULL;
 207         kq = NULL;
 208
 209         pdd = kfd_get_process_device_data(dev, pqm->process);
 210         if (!pdd) {
 211                 pr_err("Process device data doesn't exist\n");
 212                 return -1;
 213         }
 214
 215         /*
 216          * for debug process, verify that it is within the static queues limit
 217          * currently limit is set to half of the total avail HQD slots
 218          * If we are just about to create DIQ, the is_debug flag is not set yet
 219          * Hence we also check the type as well
 220          */
 221         if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
 222                 max_queues = dev->device_info->max_no_of_hqd/2;
 223
 224         if (pdd->qpd.queue_count >= max_queues)
 225                 return -ENOSPC;
 226
 227         retval = find_available_queue_slot(pqm, qid);
 228         if (retval != 0)
 229                 return retval;
 230
 231         if (list_empty(&pdd->qpd.queues_list) &&
 232             list_empty(&pdd->qpd.priv_queue_list))
 233                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 234
 235         pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 236         if (!pqn) {
 237                 retval = -ENOMEM;
 238                 goto err_allocate_pqn;
 239         }
 240
 241         switch (type) {
 242         case KFD_QUEUE_TYPE_SDMA:
 243         case KFD_QUEUE_TYPE_SDMA_XGMI:
 244                 /* SDMA queues are always allocated statically no matter
 245                  * which scheduler mode is used. We also do not need to
 246                  * check whether a SDMA queue can be allocated here, because
 247                  * allocate_sdma_queue() in create_queue() has the
 248                  * corresponding check logic.
 249                  */
 250                 retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
 251                 if (retval != 0)
 252                         goto err_create_queue;
 253                 pqn->q = q;
 254                 pqn->kq = NULL;
 255                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 256                 print_queue(q);
 257                 break;
 258
 259         case KFD_QUEUE_TYPE_COMPUTE:
 260                 /* check if there is over subscription */
 261                 if ((dev->dqm->sched_policy ==
 262                      KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 263                 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 264                 (dev->dqm->active_queue_count >= get_cp_queues_num(dev->dqm)))) {
 265                         pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
 266                         retval = -EPERM;
 267                         goto err_create_queue;
 268                 }
 269
 270                 retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
 271                 if (retval != 0)
 272                         goto err_create_queue;
 273                 pqn->q = q;
 274                 pqn->kq = NULL;
 275                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 276                 print_queue(q);
 277                 break;
 278         case KFD_QUEUE_TYPE_DIQ:
 279                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 280                 if (!kq) {
 281                         retval = -ENOMEM;
 282                         goto err_create_queue;
 283                 }
 284                 kq->queue->properties.queue_id = *qid;
 285                 pqn->kq = kq;
 286                 pqn->q = NULL;
 287                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 288                                                         kq, &pdd->qpd);
 289                 break;
 290         default:
 291                 WARN(1, "Invalid queue type %d", type);
 292                 retval = -EINVAL;
 293         }
 294
 295         if (retval != 0) {
 296                 pr_err("Pasid 0x%x DQM create queue type %d failed. ret %d\n",
 297                         pqm->process->pasid, type, retval);
 298                 goto err_create_queue;
 299         }
 300
 301         if (q && p_doorbell_offset_in_process)
 302                 /* Return the doorbell offset within the doorbell page
 303                  * to the caller so it can be passed up to user mode
 304                  * (in bytes).
 305                  * There are always 1024 doorbells per process, so in case
 306                  * of 8-byte doorbells, there are two doorbell pages per
 307                  * process.
 308                  */
 309                 *p_doorbell_offset_in_process =
 310                         (q->properties.doorbell_off * sizeof(uint32_t)) &
 311                         (kfd_doorbell_process_slice(dev) - 1);
 312
 313         pr_debug("PQM After DQM create queue\n");
 314
 315         list_add(&pqn->process_queue_list, &pqm->queues);
 316
 317         if (q) {
 318                 pr_debug("PQM done creating queue\n");
 319                 kfd_procfs_add_queue(q);
 320                 print_queue_properties(&q->properties);
 321         }
 322
 323         return retval;
 324
 325 err_create_queue:
 326         uninit_queue(q);
 327         if (kq)
 328                 kernel_queue_uninit(kq, false);
 329         kfree(pqn);
 330 err_allocate_pqn:
 331         /* check if queues list is empty unregister process from device */
 332         clear_bit(*qid, pqm->queue_slot_bitmap);
 333         if (list_empty(&pdd->qpd.queues_list) &&
 334             list_empty(&pdd->qpd.priv_queue_list))
 335                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 336         return retval;
 337 }
 338
 339 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 340 {
 341         struct process_queue_node *pqn;
 342         struct kfd_process_device *pdd;
 343         struct device_queue_manager *dqm;
 344         struct kfd_dev *dev;
 345         int retval;
 346
 347         dqm = NULL;
 348
 349         retval = 0;
 350
 351         pqn = get_queue_by_qid(pqm, qid);
 352         if (!pqn) {
 353                 pr_err("Queue id does not match any known queue\n");
 354                 return -EINVAL;
 355         }
 356
 357         dev = NULL;
 358         if (pqn->kq)
 359                 dev = pqn->kq->dev;
 360         if (pqn->q)
 361                 dev = pqn->q->device;
 362         if (WARN_ON(!dev))
 363                 return -ENODEV;
 364
 365         pdd = kfd_get_process_device_data(dev, pqm->process);
 366         if (!pdd) {
 367                 pr_err("Process device data doesn't exist\n");
 368                 return -1;
 369         }
 370
 371         if (pqn->kq) {
 372                 /* destroy kernel queue (DIQ) */
 373                 dqm = pqn->kq->dev->dqm;
 374                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 375                 kernel_queue_uninit(pqn->kq, false);
 376         }
 377
 378         if (pqn->q) {
 379                 kfd_procfs_del_queue(pqn->q);
 380                 dqm = pqn->q->device->dqm;
 381                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 382                 if (retval) {
 383                         pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n",
 384                                 pqm->process->pasid,
 385                                 pqn->q->properties.queue_id, retval);
 386                         if (retval != -ETIME)
 387                                 goto err_destroy_queue;
 388                 }
 389
 390                 if (pqn->q->gws) {
 391                         amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info,
 392                                 pqn->q->gws);
 393                         pdd->qpd.num_gws = 0;
 394                 }
 395
 396                 kfree(pqn->q->properties.cu_mask);
 397                 pqn->q->properties.cu_mask = NULL;
 398                 uninit_queue(pqn->q);
 399         }
 400
 401         list_del(&pqn->process_queue_list);
 402         kfree(pqn);
 403         clear_bit(qid, pqm->queue_slot_bitmap);
 404
 405         if (list_empty(&pdd->qpd.queues_list) &&
 406             list_empty(&pdd->qpd.priv_queue_list))
 407                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 408
 409 err_destroy_queue:
 410         return retval;
 411 }
 412
 413 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 414                         struct queue_properties *p)
 415 {
 416         int retval;
 417         struct process_queue_node *pqn;
 418
 419         pqn = get_queue_by_qid(pqm, qid);
 420         if (!pqn) {
 421                 pr_debug("No queue %d exists for update operation\n", qid);
 422                 return -EFAULT;
 423         }
 424
 425         pqn->q->properties.queue_address = p->queue_address;
 426         pqn->q->properties.queue_size = p->queue_size;
 427         pqn->q->properties.queue_percent = p->queue_percent;
 428         pqn->q->properties.priority = p->priority;
 429
 430         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 431                                                         pqn->q);
 432         if (retval != 0)
 433                 return retval;
 434
 435         return 0;
 436 }
 437
 438 int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid,
 439                         struct queue_properties *p)
 440 {
 441         int retval;
 442         struct process_queue_node *pqn;
 443
 444         pqn = get_queue_by_qid(pqm, qid);
 445         if (!pqn) {
 446                 pr_debug("No queue %d exists for update operation\n", qid);
 447                 return -EFAULT;
 448         }
 449
 450         /* Free the old CU mask memory if it is already allocated, then
 451          * allocate memory for the new CU mask.
 452          */
 453         kfree(pqn->q->properties.cu_mask);
 454
 455         pqn->q->properties.cu_mask_count = p->cu_mask_count;
 456         pqn->q->properties.cu_mask = p->cu_mask;
 457
 458         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 459                                                         pqn->q);
 460         if (retval != 0)
 461                 return retval;
 462
 463         return 0;
 464 }
 465
 466 struct kernel_queue *pqm_get_kernel_queue(
 467                                         struct process_queue_manager *pqm,
 468                                         unsigned int qid)
 469 {
 470         struct process_queue_node *pqn;
 471
 472         pqn = get_queue_by_qid(pqm, qid);
 473         if (pqn && pqn->kq)
 474                 return pqn->kq;
 475
 476         return NULL;
 477 }
 478
 479 struct queue *pqm_get_user_queue(struct process_queue_manager *pqm,
 480                                         unsigned int qid)
 481 {
 482         struct process_queue_node *pqn;
 483
 484         pqn = get_queue_by_qid(pqm, qid);
 485         return pqn ? pqn->q : NULL;
 486 }
 487
 488 int pqm_get_wave_state(struct process_queue_manager *pqm,
 489                        unsigned int qid,
 490                        void __user *ctl_stack,
 491                        u32 *ctl_stack_used_size,
 492                        u32 *save_area_used_size)
 493 {
 494         struct process_queue_node *pqn;
 495
 496         pqn = get_queue_by_qid(pqm, qid);
 497         if (!pqn) {
 498                 pr_debug("amdkfd: No queue %d exists for operation\n",
 499                          qid);
 500                 return -EFAULT;
 501         }
 502
 503         return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm,
 504                                                        pqn->q,
 505                                                        ctl_stack,
 506                                                        ctl_stack_used_size,
 507                                                        save_area_used_size);
 508 }
 509
 510 #if defined(CONFIG_DEBUG_FS)
 511
 512 int pqm_debugfs_mqds(struct seq_file *m, void *data)
 513 {
 514         struct process_queue_manager *pqm = data;
 515         struct process_queue_node *pqn;
 516         struct queue *q;
 517         enum KFD_MQD_TYPE mqd_type;
 518         struct mqd_manager *mqd_mgr;
 519         int r = 0;
 520
 521         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 522                 if (pqn->q) {
 523                         q = pqn->q;
 524                         switch (q->properties.type) {
 525                         case KFD_QUEUE_TYPE_SDMA:
 526                         case KFD_QUEUE_TYPE_SDMA_XGMI:
 527                                 seq_printf(m, "  SDMA queue on device %x\n",
 528                                            q->device->id);
 529                                 mqd_type = KFD_MQD_TYPE_SDMA;
 530                                 break;
 531                         case KFD_QUEUE_TYPE_COMPUTE:
 532                                 seq_printf(m, "  Compute queue on device %x\n",
 533                                            q->device->id);
 534                                 mqd_type = KFD_MQD_TYPE_CP;
 535                                 break;
 536                         default:
 537                                 seq_printf(m,
 538                                 "  Bad user queue type %d on device %x\n",
 539                                            q->properties.type, q->device->id);
 540                                 continue;
 541                         }
 542                         mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
 543                 } else if (pqn->kq) {
 544                         q = pqn->kq->queue;
 545                         mqd_mgr = pqn->kq->mqd_mgr;
 546                         switch (q->properties.type) {
 547                         case KFD_QUEUE_TYPE_DIQ:
 548                                 seq_printf(m, "  DIQ on device %x\n",
 549                                            pqn->kq->dev->id);
 550                                 break;
 551                         default:
 552                                 seq_printf(m,
 553                                 "  Bad kernel queue type %d on device %x\n",
 554                                            q->properties.type,
 555                                            pqn->kq->dev->id);
 556                                 continue;
 557                         }
 558                 } else {
 559                         seq_printf(m,
 560                 "  Weird: Queue node with neither kernel nor user queue\n");
 561                         continue;
 562                 }
 563
 564                 r = mqd_mgr->debugfs_show_mqd(m, q->mqd);
 565                 if (r != 0)
 566                         break;
 567         }
 568
 569         return r;
 570 }
 571
 572 #endif