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 >=
 190                         CIK_SDMA_QUEUES_PER_ENGINE * CIK_SDMA_ENGINE_NUM) {
 191                         pr_err("Over-subscription is not allowed for SDMA.\n");
 192                         retval = -EPERM;
 193                         goto err_create_queue;
 194                 }
 195
 196                 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
 197                 if (retval != 0)
 198                         goto err_create_queue;
 199                 pqn->q = q;
 200                 pqn->kq = NULL;
 201                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 202                 pr_debug("DQM returned %d for create_queue\n", retval);
 203                 print_queue(q);
 204                 break;
 205
 206         case KFD_QUEUE_TYPE_COMPUTE:
 207                 /* check if there is over subscription */
 208                 if ((dev->dqm->sched_policy ==
 209                      KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 210                 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 211                 (dev->dqm->queue_count >= get_queues_num(dev->dqm)))) {
 212                         pr_err("Over-subscription is not allowed in radeon_kfd.sched_policy == 1\n");
 213                         retval = -EPERM;
 214                         goto err_create_queue;
 215                 }
 216
 217                 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
 218                 if (retval != 0)
 219                         goto err_create_queue;
 220                 pqn->q = q;
 221                 pqn->kq = NULL;
 222                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
 223                 pr_debug("DQM returned %d for create_queue\n", retval);
 224                 print_queue(q);
 225                 break;
 226         case KFD_QUEUE_TYPE_DIQ:
 227                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 228                 if (!kq) {
 229                         retval = -ENOMEM;
 230                         goto err_create_queue;
 231                 }
 232                 kq->queue->properties.queue_id = *qid;
 233                 pqn->kq = kq;
 234                 pqn->q = NULL;
 235                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 236                                                         kq, &pdd->qpd);
 237                 break;
 238         default:
 239                 WARN(1, "Invalid queue type %d", type);
 240                 retval = -EINVAL;
 241         }
 242
 243         if (retval != 0) {
 244                 pr_err("Pasid %d DQM create queue %d failed. ret %d\n",
 245                         pqm->process->pasid, type, retval);
 246                 goto err_create_queue;
 247         }
 248
 249         if (q)
 250                 /* Return the doorbell offset within the doorbell page
 251                  * to the caller so it can be passed up to user mode
 252                  * (in bytes).
 253                  */
 254                 properties->doorbell_off =
 255                         (q->properties.doorbell_off * sizeof(uint32_t)) &
 256                         (kfd_doorbell_process_slice(dev) - 1);
 257
 258         pr_debug("PQM After DQM create queue\n");
 259
 260         list_add(&pqn->process_queue_list, &pqm->queues);
 261
 262         if (q) {
 263                 pr_debug("PQM done creating queue\n");
 264                 print_queue_properties(&q->properties);
 265         }
 266
 267         return retval;
 268
 269 err_create_queue:
 270         kfree(pqn);
 271 err_allocate_pqn:
 272         /* check if queues list is empty unregister process from device */
 273         clear_bit(*qid, pqm->queue_slot_bitmap);
 274         if (list_empty(&pdd->qpd.queues_list) &&
 275             list_empty(&pdd->qpd.priv_queue_list))
 276                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 277         return retval;
 278 }
 279
 280 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 281 {
 282         struct process_queue_node *pqn;
 283         struct kfd_process_device *pdd;
 284         struct device_queue_manager *dqm;
 285         struct kfd_dev *dev;
 286         int retval;
 287
 288         dqm = NULL;
 289
 290         retval = 0;
 291
 292         pqn = get_queue_by_qid(pqm, qid);
 293         if (!pqn) {
 294                 pr_err("Queue id does not match any known queue\n");
 295                 return -EINVAL;
 296         }
 297
 298         dev = NULL;
 299         if (pqn->kq)
 300                 dev = pqn->kq->dev;
 301         if (pqn->q)
 302                 dev = pqn->q->device;
 303         if (WARN_ON(!dev))
 304                 return -ENODEV;
 305
 306         pdd = kfd_get_process_device_data(dev, pqm->process);
 307         if (!pdd) {
 308                 pr_err("Process device data doesn't exist\n");
 309                 return -1;
 310         }
 311
 312         if (pqn->kq) {
 313                 /* destroy kernel queue (DIQ) */
 314                 dqm = pqn->kq->dev->dqm;
 315                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 316                 kernel_queue_uninit(pqn->kq);
 317         }
 318
 319         if (pqn->q) {
 320                 dqm = pqn->q->device->dqm;
 321                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 322                 if (retval) {
 323                         pr_err("Pasid %d destroy queue %d failed, ret %d\n",
 324                                 pqm->process->pasid,
 325                                 pqn->q->properties.queue_id, retval);
 326                         if (retval != -ETIME)
 327                                 goto err_destroy_queue;
 328                 }
 329                 uninit_queue(pqn->q);
 330         }
 331
 332         list_del(&pqn->process_queue_list);
 333         kfree(pqn);
 334         clear_bit(qid, pqm->queue_slot_bitmap);
 335
 336         if (list_empty(&pdd->qpd.queues_list) &&
 337             list_empty(&pdd->qpd.priv_queue_list))
 338                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 339
 340 err_destroy_queue:
 341         return retval;
 342 }
 343
 344 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 345                         struct queue_properties *p)
 346 {
 347         int retval;
 348         struct process_queue_node *pqn;
 349
 350         pqn = get_queue_by_qid(pqm, qid);
 351         if (!pqn) {
 352                 pr_debug("No queue %d exists for update operation\n", qid);
 353                 return -EFAULT;
 354         }
 355
 356         pqn->q->properties.queue_address = p->queue_address;
 357         pqn->q->properties.queue_size = p->queue_size;
 358         pqn->q->properties.queue_percent = p->queue_percent;
 359         pqn->q->properties.priority = p->priority;
 360
 361         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 362                                                         pqn->q);
 363         if (retval != 0)
 364                 return retval;
 365
 366         return 0;
 367 }
 368
 369 struct kernel_queue *pqm_get_kernel_queue(
 370                                         struct process_queue_manager *pqm,
 371                                         unsigned int qid)
 372 {
 373         struct process_queue_node *pqn;
 374
 375         pqn = get_queue_by_qid(pqm, qid);
 376         if (pqn && pqn->kq)
 377                 return pqn->kq;
 378
 379         return NULL;
 380 }
 381
 382 #if defined(CONFIG_DEBUG_FS)
 383
 384 int pqm_debugfs_mqds(struct seq_file *m, void *data)
 385 {
 386         struct process_queue_manager *pqm = data;
 387         struct process_queue_node *pqn;
 388         struct queue *q;
 389         enum KFD_MQD_TYPE mqd_type;
 390         struct mqd_manager *mqd_manager;
 391         int r = 0;
 392
 393         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
 394                 if (pqn->q) {
 395                         q = pqn->q;
 396                         switch (q->properties.type) {
 397                         case KFD_QUEUE_TYPE_SDMA:
 398                                 seq_printf(m, "  SDMA queue on device %x\n",
 399                                            q->device->id);
 400                                 mqd_type = KFD_MQD_TYPE_SDMA;
 401                                 break;
 402                         case KFD_QUEUE_TYPE_COMPUTE:
 403                                 seq_printf(m, "  Compute queue on device %x\n",
 404                                            q->device->id);
 405                                 mqd_type = KFD_MQD_TYPE_CP;
 406                                 break;
 407                         default:
 408                                 seq_printf(m,
 409                                 "  Bad user queue type %d on device %x\n",
 410                                            q->properties.type, q->device->id);
 411                                 continue;
 412                         }
 413                         mqd_manager = q->device->dqm->ops.get_mqd_manager(
 414                                 q->device->dqm, mqd_type);
 415                 } else if (pqn->kq) {
 416                         q = pqn->kq->queue;
 417                         mqd_manager = pqn->kq->mqd;
 418                         switch (q->properties.type) {
 419                         case KFD_QUEUE_TYPE_DIQ:
 420                                 seq_printf(m, "  DIQ on device %x\n",
 421                                            pqn->kq->dev->id);
 422                                 mqd_type = KFD_MQD_TYPE_HIQ;
 423                                 break;
 424                         default:
 425                                 seq_printf(m,
 426                                 "  Bad kernel queue type %d on device %x\n",
 427                                            q->properties.type,
 428                                            pqn->kq->dev->id);
 429                                 continue;
 430                         }
 431                 } else {
 432                         seq_printf(m,
 433                 "  Weird: Queue node with neither kernel nor user queue\n");
 434                         continue;
 435                 }
 436
 437                 r = mqd_manager->debugfs_show_mqd(m, q->mqd);
 438                 if (r != 0)
 439                         break;
 440         }
 441
 442         return r;
 443 }
 444
 445 #endif