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
  30 static inline struct process_queue_node *get_queue_by_qid(
  31                         struct process_queue_manager *pqm, unsigned int qid)
  32 {
  33         struct process_queue_node *pqn;
  34
  35         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
  36                 if ((pqn->q && pqn->q->properties.queue_id == qid) ||
  37                     (pqn->kq && pqn->kq->queue->properties.queue_id == qid))
  38                         return pqn;
  39         }
  40
  41         return NULL;
  42 }
  43
  44 static int find_available_queue_slot(struct process_queue_manager *pqm,
  45                                         unsigned int *qid)
  46 {
  47         unsigned long found;
  48
  49         found = find_first_zero_bit(pqm->queue_slot_bitmap,
  50                         KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
  51
  52         pr_debug("The new slot id %lu\n", found);
  53
  54         if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
  55                 pr_info("Cannot open more queues for process with pasid %d\n",
  56                                 pqm->process->pasid);
  57                 return -ENOMEM;
  58         }
  59
  60         set_bit(found, pqm->queue_slot_bitmap);
  61         *qid = found;
  62
  63         return 0;
  64 }
  65
  66 void kfd_process_dequeue_from_device(struct kfd_process_device *pdd)
  67 {
  68         struct kfd_dev *dev = pdd->dev;
  69
  70         if (pdd->already_dequeued)
  71                 return;
  72
  73         dev->dqm->ops.process_termination(dev->dqm, &pdd->qpd);
  74         pdd->already_dequeued = true;
  75 }
  76
  77 void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
  78 {
  79         struct kfd_process_device *pdd;
  80
  81         list_for_each_entry(pdd, &p->per_device_data, per_device_list)
  82                 kfd_process_dequeue_from_device(pdd);
  83 }
  84
  85 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
  86 {
  87         INIT_LIST_HEAD(&pqm->queues);
  88         pqm->queue_slot_bitmap =
  89                         kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
  90                                         BITS_PER_BYTE), GFP_KERNEL);
  91         if (!pqm->queue_slot_bitmap)
  92                 return -ENOMEM;
  93         pqm->process = p;
  94
  95         return 0;
  96 }
  97
  98 void pqm_uninit(struct process_queue_manager *pqm)
  99 {
 100         struct process_queue_node *pqn, *next;
 101
 102         list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
 103                 uninit_queue(pqn->q);
 104                 list_del(&pqn->process_queue_list);
 105                 kfree(pqn);
 106         }
 107
 108         kfree(pqm->queue_slot_bitmap);
 109         pqm->queue_slot_bitmap = NULL;
 110 }
 111
 112 static int create_cp_queue(struct process_queue_manager *pqm,
 113                                 struct kfd_dev *dev, struct queue **q,
 114                                 struct queue_properties *q_properties,
 115                                 struct file *f, unsigned int qid)
 116 {
 117         int retval;
 118
 119         /* Doorbell initialized in user space*/
 120         q_properties->doorbell_ptr = NULL;
 121
 122         /* let DQM handle it*/
 123         q_properties->vmid = 0;
 124         q_properties->queue_id = qid;
 125
 126         retval = init_queue(q, q_properties);
 127         if (retval != 0)
 128                 return retval;
 129
 130         (*q)->device = dev;
 131         (*q)->process = pqm->process;
 132
 133         pr_debug("PQM After init queue");
 134
 135         return retval;
 136 }
 137
 138 int pqm_create_queue(struct process_queue_manager *pqm,
 139                             struct kfd_dev *dev,
 140                             struct file *f,
 141                             struct queue_properties *properties,
 142                             unsigned int *qid)
 143 {
 144         int retval;
 145         struct kfd_process_device *pdd;
 146         struct queue *q;
 147         struct process_queue_node *pqn;
 148         struct kernel_queue *kq;
 149         enum kfd_queue_type type = properties->type;
 150         unsigned int max_queues = 127; /* HWS limit */
 151
 152         q = NULL;
 153         kq = NULL;
 154
 155         pdd = kfd_get_process_device_data(dev, pqm->process);
 156         if (!pdd) {
 157                 pr_err("Process device data doesn't exist\n");
 158                 return -1;
 159         }
 160
 161         /*
 162          * for debug process, verify that it is within the static queues limit
 163          * currently limit is set to half of the total avail HQD slots
 164          * If we are just about to create DIQ, the is_debug flag is not set yet
 165          * Hence we also check the type as well
 166          */
 167         if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
 168                 max_queues = dev->device_info->max_no_of_hqd/2;
 169
 170         if (pdd->qpd.queue_count >= max_queues)
 171                 return -ENOSPC;
 172
 173         retval = find_available_queue_slot(pqm, qid);
 174         if (retval != 0)
 175                 return retval;
 176
 177         if (list_empty(&pdd->qpd.queues_list) &&
 178             list_empty(&pdd->qpd.priv_queue_list))
 179                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 180
 181         pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 182         if (!pqn) {
 183                 retval = -ENOMEM;
 184                 goto err_allocate_pqn;
 185         }
 186
 187         switch (type) {
 188         case KFD_QUEUE_TYPE_SDMA:
 189                 if (dev->dqm->queue_count >= get_num_sdma_queues(dev->dqm)) {
 190                         pr_err("Over-subscription is not allowed for SDMA.\n");
 191                         retval = -EPERM;
 192                         goto err_create_queue;
 193                 }
 194
 195                 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
 196                 if (retval != 0)
 197                         goto err_create_queue;
 198                 pqn->q = q;
 199                 pqn->kq = NULL;
 200                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 201                 pr_debug("DQM returned %d for create_queue\n", retval);
 202                 print_queue(q);
 203                 break;
 204
 205         case KFD_QUEUE_TYPE_COMPUTE:
 206                 /* check if there is over subscription */
 207                 if ((dev->dqm->sched_policy ==
 208                      KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 209                 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 210                 (dev->dqm->queue_count >= get_queues_num(dev->dqm)))) {
 211                         pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n");
 212                         retval = -EPERM;
 213                         goto err_create_queue;
 214                 }
 215
 216                 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
 217                 if (retval != 0)
 218                         goto err_create_queue;
 219                 pqn->q = q;
 220                 pqn->kq = NULL;
 221                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 222                 pr_debug("DQM returned %d for create_queue\n", retval);
 223                 print_queue(q);
 224                 break;
 225         case KFD_QUEUE_TYPE_DIQ:
 226                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 227                 if (!kq) {
 228                         retval = -ENOMEM;
 229                         goto err_create_queue;
 230                 }
 231                 kq->queue->properties.queue_id = *qid;
 232                 pqn->kq = kq;
 233                 pqn->q = NULL;
 234                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 235                                                         kq, &pdd->qpd);
 236                 break;
 237         default:
 238                 WARN(1, "Invalid queue type %d", type);
 239                 retval = -EINVAL;
 240         }
 241
 242         if (retval != 0) {
 243                 pr_err("Pasid %d DQM create queue %d failed. ret %d\n",
 244                         pqm->process->pasid, type, retval);
 245                 goto err_create_queue;
 246         }
 247
 248         if (q)
 249                 /* Return the doorbell offset within the doorbell page
 250                  * to the caller so it can be passed up to user mode
 251                  * (in bytes).
 252                  */
 253                 properties->doorbell_off =
 254                         (q->properties.doorbell_off * sizeof(uint32_t)) &
 255                         (kfd_doorbell_process_slice(dev) - 1);
 256
 257         pr_debug("PQM After DQM create queue\n");
 258
 259         list_add(&pqn->process_queue_list, &pqm->queues);
 260
 261         if (q) {
 262                 pr_debug("PQM done creating queue\n");
 263                 print_queue_properties(&q->properties);
 264         }
 265
 266         return retval;
 267
 268 err_create_queue:
 269         kfree(pqn);
 270 err_allocate_pqn:
 271         /* check if queues list is empty unregister process from device */
 272         clear_bit(*qid, pqm->queue_slot_bitmap);
 273         if (list_empty(&pdd->qpd.queues_list) &&
 274             list_empty(&pdd->qpd.priv_queue_list))
 275                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 276         return retval;
 277 }
 278
 279 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 280 {
 281         struct process_queue_node *pqn;
 282         struct kfd_process_device *pdd;
 283         struct device_queue_manager *dqm;
 284         struct kfd_dev *dev;
 285         int retval;
 286
 287         dqm = NULL;
 288
 289         retval = 0;
 290
 291         pqn = get_queue_by_qid(pqm, qid);
 292         if (!pqn) {
 293                 pr_err("Queue id does not match any known queue\n");
 294                 return -EINVAL;
 295         }
 296
 297         dev = NULL;
 298         if (pqn->kq)
 299                 dev = pqn->kq->dev;
 300         if (pqn->q)
 301                 dev = pqn->q->device;
 302         if (WARN_ON(!dev))
 303                 return -ENODEV;
 304
 305         pdd = kfd_get_process_device_data(dev, pqm->process);
 306         if (!pdd) {
 307                 pr_err("Process device data doesn't exist\n");
 308                 return -1;
 309         }
 310
 311         if (pqn->kq) {
 312                 /* destroy kernel queue (DIQ) */
 313                 dqm = pqn->kq->dev->dqm;
 314                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 315                 kernel_queue_uninit(pqn->kq);
 316         }
 317
 318         if (pqn->q) {
 319                 dqm = pqn->q->device->dqm;
 320                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 321                 if (retval) {
 322                         pr_err("Pasid %d destroy queue %d failed, ret %d\n",
 323                                 pqm->process->pasid,
 324                                 pqn->q->properties.queue_id, retval);
 325                         if (retval != -ETIME)
 326                                 goto err_destroy_queue;
 327                 }
 328                 kfree(pqn->q->properties.cu_mask);
 329                 pqn->q->properties.cu_mask = NULL;
 330                 uninit_queue(pqn->q);
 331         }
 332
 333         list_del(&pqn->process_queue_list);
 334         kfree(pqn);
 335         clear_bit(qid, pqm->queue_slot_bitmap);
 336
 337         if (list_empty(&pdd->qpd.queues_list) &&
 338             list_empty(&pdd->qpd.priv_queue_list))
 339                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 340
 341 err_destroy_queue:
 342         return retval;
 343 }
 344
 345 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 346                         struct queue_properties *p)
 347 {
 348         int retval;
 349         struct process_queue_node *pqn;
 350
 351         pqn = get_queue_by_qid(pqm, qid);
 352         if (!pqn) {
 353                 pr_debug("No queue %d exists for update operation\n", qid);
 354                 return -EFAULT;
 355         }
 356
 357         pqn->q->properties.queue_address = p->queue_address;
 358         pqn->q->properties.queue_size = p->queue_size;
 359         pqn->q->properties.queue_percent = p->queue_percent;
 360         pqn->q->properties.priority = p->priority;
 361
 362         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 363                                                         pqn->q);
 364         if (retval != 0)
 365                 return retval;
 366
 367         return 0;
 368 }
 369
 370 int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid,
 371                         struct queue_properties *p)
 372 {
 373         int retval;
 374         struct process_queue_node *pqn;
 375
 376         pqn = get_queue_by_qid(pqm, qid);
 377         if (!pqn) {
 378                 pr_debug("No queue %d exists for update operation\n", qid);
 379                 return -EFAULT;
 380         }
 381
 382         /* Free the old CU mask memory if it is already allocated, then
 383          * allocate memory for the new CU mask.
 384          */
 385         kfree(pqn->q->properties.cu_mask);
 386
 387         pqn->q->properties.cu_mask_count = p->cu_mask_count;
 388         pqn->q->properties.cu_mask = p->cu_mask;
 389
 390         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 391                                                         pqn->q);
 392         if (retval != 0)
 393                 return retval;
 394
 395         return 0;
 396 }
 397
 398 struct kernel_queue *pqm_get_kernel_queue(
 399                                         struct process_queue_manager *pqm,
 400                                         unsigned int qid)
 401 {
 402         struct process_queue_node *pqn;
 403
 404         pqn = get_queue_by_qid(pqm, qid);
 405         if (pqn && pqn->kq)
 406                 return pqn->kq;
 407
 408         return NULL;
 409 }
 410
 411 #if defined(CONFIG_DEBUG_FS)
 412
 413 int pqm_debugfs_mqds(struct seq_file *m, void *data)
 414 {
 415         struct process_queue_manager *pqm = data;
 416         struct process_queue_node *pqn;
 417         struct queue *q;
 418         enum KFD_MQD_TYPE mqd_type;
 419         struct mqd_manager *mqd_mgr;
 420         int r = 0;
 421
 422         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 423                 if (pqn->q) {
 424                         q = pqn->q;
 425                         switch (q->properties.type) {
 426                         case KFD_QUEUE_TYPE_SDMA:
 427                                 seq_printf(m, "  SDMA queue on device %x\n",
 428                                            q->device->id);
 429                                 mqd_type = KFD_MQD_TYPE_SDMA;
 430                                 break;
 431                         case KFD_QUEUE_TYPE_COMPUTE:
 432                                 seq_printf(m, "  Compute queue on device %x\n",
 433                                            q->device->id);
 434                                 mqd_type = KFD_MQD_TYPE_CP;
 435                                 break;
 436                         default:
 437                                 seq_printf(m,
 438                                 "  Bad user queue type %d on device %x\n",
 439                                            q->properties.type, q->device->id);
 440                                 continue;
 441                         }
 442                         mqd_mgr = q->device->dqm->ops.get_mqd_manager(
 443                                 q->device->dqm, mqd_type);
 444                 } else if (pqn->kq) {
 445                         q = pqn->kq->queue;
 446                         mqd_mgr = pqn->kq->mqd_mgr;
 447                         switch (q->properties.type) {
 448                         case KFD_QUEUE_TYPE_DIQ:
 449                                 seq_printf(m, "  DIQ on device %x\n",
 450                                            pqn->kq->dev->id);
 451                                 mqd_type = KFD_MQD_TYPE_HIQ;
 452                                 break;
 453                         default:
 454                                 seq_printf(m,
 455                                 "  Bad kernel queue type %d on device %x\n",
 456                                            q->properties.type,
 457                                            pqn->kq->dev->id);
 458                                 continue;
 459                         }
 460                 } else {
 461                         seq_printf(m,
 462                 "  Weird: Queue node with neither kernel nor user queue\n");
 463                         continue;
 464                 }
 465
 466                 r = mqd_mgr->debugfs_show_mqd(m, q->mqd);
 467                 if (r != 0)
 468                         break;
 469         }
 470
 471         return r;
 472 }
 473
 474 #endif