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         q_properties->doorbell_off =
 123                         kfd_queue_id_to_doorbell(dev, pqm->process, qid);
 124
 125         /* let DQM handle it*/
 126         q_properties->vmid = 0;
 127         q_properties->queue_id = qid;
 128
 129         retval = init_queue(q, q_properties);
 130         if (retval != 0)
 131                 return retval;
 132
 133         (*q)->device = dev;
 134         (*q)->process = pqm->process;
 135
 136         pr_debug("PQM After init queue");
 137
 138         return retval;
 139 }
 140
 141 int pqm_create_queue(struct process_queue_manager *pqm,
 142                             struct kfd_dev *dev,
 143                             struct file *f,
 144                             struct queue_properties *properties,
 145                             unsigned int *qid)
 146 {
 147         int retval;
 148         struct kfd_process_device *pdd;
 149         struct queue *q;
 150         struct process_queue_node *pqn;
 151         struct kernel_queue *kq;
 152         enum kfd_queue_type type = properties->type;
 153         unsigned int max_queues = 127; /* HWS limit */
 154
 155         q = NULL;
 156         kq = NULL;
 157
 158         pdd = kfd_get_process_device_data(dev, pqm->process);
 159         if (!pdd) {
 160                 pr_err("Process device data doesn't exist\n");
 161                 return -1;
 162         }
 163
 164         /*
 165          * for debug process, verify that it is within the static queues limit
 166          * currently limit is set to half of the total avail HQD slots
 167          * If we are just about to create DIQ, the is_debug flag is not set yet
 168          * Hence we also check the type as well
 169          */
 170         if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
 171                 max_queues = dev->device_info->max_no_of_hqd/2;
 172
 173         if (pdd->qpd.queue_count >= max_queues)
 174                 return -ENOSPC;
 175
 176         retval = find_available_queue_slot(pqm, qid);
 177         if (retval != 0)
 178                 return retval;
 179
 180         if (list_empty(&pdd->qpd.queues_list) &&
 181             list_empty(&pdd->qpd.priv_queue_list))
 182                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 183
 184         pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 185         if (!pqn) {
 186                 retval = -ENOMEM;
 187                 goto err_allocate_pqn;
 188         }
 189
 190         switch (type) {
 191         case KFD_QUEUE_TYPE_SDMA:
 192                 if (dev->dqm->queue_count >=
 193                         CIK_SDMA_QUEUES_PER_ENGINE * CIK_SDMA_ENGINE_NUM) {
 194                         pr_err("Over-subscription is not allowed for SDMA.\n");
 195                         retval = -EPERM;
 196                         goto err_create_queue;
 197                 }
 198
 199                 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
 200                 if (retval != 0)
 201                         goto err_create_queue;
 202                 pqn->q = q;
 203                 pqn->kq = NULL;
 204                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 205                 pr_debug("DQM returned %d for create_queue\n", retval);
 206                 print_queue(q);
 207                 break;
 208
 209         case KFD_QUEUE_TYPE_COMPUTE:
 210                 /* check if there is over subscription */
 211                 if ((dev->dqm->sched_policy ==
 212                      KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 213                 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 214                 (dev->dqm->queue_count >= get_queues_num(dev->dqm)))) {
 215                         pr_err("Over-subscription is not allowed in radeon_kfd.sched_policy == 1\n");
 216                         retval = -EPERM;
 217                         goto err_create_queue;
 218                 }
 219
 220                 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
 221                 if (retval != 0)
 222                         goto err_create_queue;
 223                 pqn->q = q;
 224                 pqn->kq = NULL;
 225                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 226                 pr_debug("DQM returned %d for create_queue\n", retval);
 227                 print_queue(q);
 228                 break;
 229         case KFD_QUEUE_TYPE_DIQ:
 230                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 231                 if (!kq) {
 232                         retval = -ENOMEM;
 233                         goto err_create_queue;
 234                 }
 235                 kq->queue->properties.queue_id = *qid;
 236                 pqn->kq = kq;
 237                 pqn->q = NULL;
 238                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 239                                                         kq, &pdd->qpd);
 240                 break;
 241         default:
 242                 WARN(1, "Invalid queue type %d", type);
 243                 retval = -EINVAL;
 244         }
 245
 246         if (retval != 0) {
 247                 pr_err("DQM create queue failed\n");
 248                 goto err_create_queue;
 249         }
 250
 251         pr_debug("PQM After DQM create queue\n");
 252
 253         list_add(&pqn->process_queue_list, &pqm->queues);
 254
 255         if (q) {
 256                 pr_debug("PQM done creating queue\n");
 257                 print_queue_properties(&q->properties);
 258         }
 259
 260         return retval;
 261
 262 err_create_queue:
 263         kfree(pqn);
 264 err_allocate_pqn:
 265         /* check if queues list is empty unregister process from device */
 266         clear_bit(*qid, pqm->queue_slot_bitmap);
 267         if (list_empty(&pdd->qpd.queues_list) &&
 268             list_empty(&pdd->qpd.priv_queue_list))
 269                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 270         return retval;
 271 }
 272
 273 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 274 {
 275         struct process_queue_node *pqn;
 276         struct kfd_process_device *pdd;
 277         struct device_queue_manager *dqm;
 278         struct kfd_dev *dev;
 279         int retval;
 280
 281         dqm = NULL;
 282
 283         retval = 0;
 284
 285         pqn = get_queue_by_qid(pqm, qid);
 286         if (!pqn) {
 287                 pr_err("Queue id does not match any known queue\n");
 288                 return -EINVAL;
 289         }
 290
 291         dev = NULL;
 292         if (pqn->kq)
 293                 dev = pqn->kq->dev;
 294         if (pqn->q)
 295                 dev = pqn->q->device;
 296         if (WARN_ON(!dev))
 297                 return -ENODEV;
 298
 299         pdd = kfd_get_process_device_data(dev, pqm->process);
 300         if (!pdd) {
 301                 pr_err("Process device data doesn't exist\n");
 302                 return -1;
 303         }
 304
 305         if (pqn->kq) {
 306                 /* destroy kernel queue (DIQ) */
 307                 dqm = pqn->kq->dev->dqm;
 308                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 309                 kernel_queue_uninit(pqn->kq);
 310         }
 311
 312         if (pqn->q) {
 313                 dqm = pqn->q->device->dqm;
 314                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 315                 if (retval) {
 316                         pr_debug("Destroy queue failed, returned %d\n", retval);
 317                         goto err_destroy_queue;
 318                 }
 319                 uninit_queue(pqn->q);
 320         }
 321
 322         list_del(&pqn->process_queue_list);
 323         kfree(pqn);
 324         clear_bit(qid, pqm->queue_slot_bitmap);
 325
 326         if (list_empty(&pdd->qpd.queues_list) &&
 327             list_empty(&pdd->qpd.priv_queue_list))
 328                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 329
 330 err_destroy_queue:
 331         return retval;
 332 }
 333
 334 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 335                         struct queue_properties *p)
 336 {
 337         int retval;
 338         struct process_queue_node *pqn;
 339
 340         pqn = get_queue_by_qid(pqm, qid);
 341         if (!pqn) {
 342                 pr_debug("No queue %d exists for update operation\n", qid);
 343                 return -EFAULT;
 344         }
 345
 346         pqn->q->properties.queue_address = p->queue_address;
 347         pqn->q->properties.queue_size = p->queue_size;
 348         pqn->q->properties.queue_percent = p->queue_percent;
 349         pqn->q->properties.priority = p->priority;
 350
 351         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 352                                                         pqn->q);
 353         if (retval != 0)
 354                 return retval;
 355
 356         return 0;
 357 }
 358
 359 struct kernel_queue *pqm_get_kernel_queue(
 360                                         struct process_queue_manager *pqm,
 361                                         unsigned int qid)
 362 {
 363         struct process_queue_node *pqn;
 364
 365         pqn = get_queue_by_qid(pqm, qid);
 366         if (pqn && pqn->kq)
 367                 return pqn->kq;
 368
 369         return NULL;
 370 }
 371
 372 #if defined(CONFIG_DEBUG_FS)
 373
 374 int pqm_debugfs_mqds(struct seq_file *m, void *data)
 375 {
 376         struct process_queue_manager *pqm = data;
 377         struct process_queue_node *pqn;
 378         struct queue *q;
 379         enum KFD_MQD_TYPE mqd_type;
 380         struct mqd_manager *mqd_manager;
 381         int r = 0;
 382
 383         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 384                 if (pqn->q) {
 385                         q = pqn->q;
 386                         switch (q->properties.type) {
 387                         case KFD_QUEUE_TYPE_SDMA:
 388                                 seq_printf(m, "  SDMA queue on device %x\n",
 389                                            q->device->id);
 390                                 mqd_type = KFD_MQD_TYPE_SDMA;
 391                                 break;
 392                         case KFD_QUEUE_TYPE_COMPUTE:
 393                                 seq_printf(m, "  Compute queue on device %x\n",
 394                                            q->device->id);
 395                                 mqd_type = KFD_MQD_TYPE_CP;
 396                                 break;
 397                         default:
 398                                 seq_printf(m,
 399                                 "  Bad user queue type %d on device %x\n",
 400                                            q->properties.type, q->device->id);
 401                                 continue;
 402                         }
 403                         mqd_manager = q->device->dqm->ops.get_mqd_manager(
 404                                 q->device->dqm, mqd_type);
 405                 } else if (pqn->kq) {
 406                         q = pqn->kq->queue;
 407                         mqd_manager = pqn->kq->mqd;
 408                         switch (q->properties.type) {
 409                         case KFD_QUEUE_TYPE_DIQ:
 410                                 seq_printf(m, "  DIQ on device %x\n",
 411                                            pqn->kq->dev->id);
 412                                 mqd_type = KFD_MQD_TYPE_HIQ;
 413                                 break;
 414                         default:
 415                                 seq_printf(m,
 416                                 "  Bad kernel queue type %d on device %x\n",
 417                                            q->properties.type,
 418                                            pqn->kq->dev->id);
 419                                 continue;
 420                         }
 421                 } else {
 422                         seq_printf(m,
 423                 "  Weird: Queue node with neither kernel nor user queue\n");
 424                         continue;
 425                 }
 426
 427                 r = mqd_manager->debugfs_show_mqd(m, q->mqd);
 428                 if (r != 0)
 429                         break;
 430         }
 431
 432         return r;
 433 }
 434
 435 #endif