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 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
  67 {
  68         INIT_LIST_HEAD(&pqm->queues);
  69         pqm->queue_slot_bitmap =
  70                         kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
  71                                         BITS_PER_BYTE), GFP_KERNEL);
  72         if (!pqm->queue_slot_bitmap)
  73                 return -ENOMEM;
  74         pqm->process = p;
  75
  76         return 0;
  77 }
  78
  79 void pqm_uninit(struct process_queue_manager *pqm)
  80 {
  81         int retval;
  82         struct process_queue_node *pqn, *next;
  83
  84         list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
  85                 retval = pqm_destroy_queue(
  86                                 pqm,
  87                                 (pqn->q != NULL) ?
  88                                         pqn->q->properties.queue_id :
  89                                         pqn->kq->queue->properties.queue_id);
  90
  91                 if (retval != 0) {
  92                         pr_err("failed to destroy queue\n");
  93                         return;
  94                 }
  95         }
  96         kfree(pqm->queue_slot_bitmap);
  97         pqm->queue_slot_bitmap = NULL;
  98 }
  99
 100 static int create_cp_queue(struct process_queue_manager *pqm,
 101                                 struct kfd_dev *dev, struct queue **q,
 102                                 struct queue_properties *q_properties,
 103                                 struct file *f, unsigned int qid)
 104 {
 105         int retval;
 106
 107         /* Doorbell initialized in user space*/
 108         q_properties->doorbell_ptr = NULL;
 109
 110         q_properties->doorbell_off =
 111                         kfd_queue_id_to_doorbell(dev, pqm->process, qid);
 112
 113         /* let DQM handle it*/
 114         q_properties->vmid = 0;
 115         q_properties->queue_id = qid;
 116
 117         retval = init_queue(q, q_properties);
 118         if (retval != 0)
 119                 return retval;
 120
 121         (*q)->device = dev;
 122         (*q)->process = pqm->process;
 123
 124         pr_debug("PQM After init queue");
 125
 126         return retval;
 127 }
 128
 129 int pqm_create_queue(struct process_queue_manager *pqm,
 130                             struct kfd_dev *dev,
 131                             struct file *f,
 132                             struct queue_properties *properties,
 133                             unsigned int flags,
 134                             enum kfd_queue_type type,
 135                             unsigned int *qid)
 136 {
 137         int retval;
 138         struct kfd_process_device *pdd;
 139         struct queue_properties q_properties;
 140         struct queue *q;
 141         struct process_queue_node *pqn;
 142         struct kernel_queue *kq;
 143         int num_queues = 0;
 144         struct queue *cur;
 145
 146         memcpy(&q_properties, properties, sizeof(struct queue_properties));
 147         q = NULL;
 148         kq = NULL;
 149
 150         pdd = kfd_get_process_device_data(dev, pqm->process);
 151         if (!pdd) {
 152                 pr_err("Process device data doesn't exist\n");
 153                 return -1;
 154         }
 155
 156         /*
 157          * for debug process, verify that it is within the static queues limit
 158          * currently limit is set to half of the total avail HQD slots
 159          * If we are just about to create DIQ, the is_debug flag is not set yet
 160          * Hence we also check the type as well
 161          */
 162         if ((pdd->qpd.is_debug) ||
 163                 (type == KFD_QUEUE_TYPE_DIQ)) {
 164                 list_for_each_entry(cur, &pdd->qpd.queues_list, list)
 165                         num_queues++;
 166                 if (num_queues >= dev->device_info->max_no_of_hqd/2)
 167                         return -ENOSPC;
 168         }
 169
 170         retval = find_available_queue_slot(pqm, qid);
 171         if (retval != 0)
 172                 return retval;
 173
 174         if (list_empty(&pqm->queues)) {
 175                 pdd->qpd.pqm = pqm;
 176                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 177         }
 178
 179         pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 180         if (!pqn) {
 181                 retval = -ENOMEM;
 182                 goto err_allocate_pqn;
 183         }
 184
 185         switch (type) {
 186         case KFD_QUEUE_TYPE_SDMA:
 187                 if (dev->dqm->queue_count >=
 188                         CIK_SDMA_QUEUES_PER_ENGINE * CIK_SDMA_ENGINE_NUM) {
 189                         pr_err("Over-subscription is not allowed for SDMA.\n");
 190                         retval = -EPERM;
 191                         goto err_create_queue;
 192                 }
 193
 194                 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
 195                 if (retval != 0)
 196                         goto err_create_queue;
 197                 pqn->q = q;
 198                 pqn->kq = NULL;
 199                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd,
 200                                                 &q->properties.vmid);
 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 ((sched_policy == KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 208                 ((dev->dqm->processes_count >= VMID_PER_DEVICE) ||
 209                 (dev->dqm->queue_count >= get_queues_num(dev->dqm)))) {
 210                         pr_err("Over-subscription is not allowed in radeon_kfd.sched_policy == 1\n");
 211                         retval = -EPERM;
 212                         goto err_create_queue;
 213                 }
 214
 215                 retval = create_cp_queue(pqm, dev, &q, &q_properties, f, *qid);
 216                 if (retval != 0)
 217                         goto err_create_queue;
 218                 pqn->q = q;
 219                 pqn->kq = NULL;
 220                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd,
 221                                                 &q->properties.vmid);
 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("DQM create queue failed\n");
 244                 goto err_create_queue;
 245         }
 246
 247         pr_debug("PQM After DQM create queue\n");
 248
 249         list_add(&pqn->process_queue_list, &pqm->queues);
 250
 251         if (q) {
 252                 *properties = q->properties;
 253                 pr_debug("PQM done creating queue\n");
 254                 print_queue_properties(properties);
 255         }
 256
 257         return retval;
 258
 259 err_create_queue:
 260         kfree(pqn);
 261 err_allocate_pqn:
 262         /* check if queues list is empty unregister process from device */
 263         clear_bit(*qid, pqm->queue_slot_bitmap);
 264         if (list_empty(&pqm->queues))
 265                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 266         return retval;
 267 }
 268
 269 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 270 {
 271         struct process_queue_node *pqn;
 272         struct kfd_process_device *pdd;
 273         struct device_queue_manager *dqm;
 274         struct kfd_dev *dev;
 275         int retval;
 276
 277         dqm = NULL;
 278
 279         retval = 0;
 280
 281         pqn = get_queue_by_qid(pqm, qid);
 282         if (!pqn) {
 283                 pr_err("Queue id does not match any known queue\n");
 284                 return -EINVAL;
 285         }
 286
 287         dev = NULL;
 288         if (pqn->kq)
 289                 dev = pqn->kq->dev;
 290         if (pqn->q)
 291                 dev = pqn->q->device;
 292         if (WARN_ON(!dev))
 293                 return -ENODEV;
 294
 295         pdd = kfd_get_process_device_data(dev, pqm->process);
 296         if (!pdd) {
 297                 pr_err("Process device data doesn't exist\n");
 298                 return -1;
 299         }
 300
 301         if (pqn->kq) {
 302                 /* destroy kernel queue (DIQ) */
 303                 dqm = pqn->kq->dev->dqm;
 304                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 305                 kernel_queue_uninit(pqn->kq);
 306         }
 307
 308         if (pqn->q) {
 309                 dqm = pqn->q->device->dqm;
 310                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 311                 if (retval != 0)
 312                         return retval;
 313
 314                 uninit_queue(pqn->q);
 315         }
 316
 317         list_del(&pqn->process_queue_list);
 318         kfree(pqn);
 319         clear_bit(qid, pqm->queue_slot_bitmap);
 320
 321         if (list_empty(&pqm->queues))
 322                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 323
 324         return retval;
 325 }
 326
 327 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 328                         struct queue_properties *p)
 329 {
 330         int retval;
 331         struct process_queue_node *pqn;
 332
 333         pqn = get_queue_by_qid(pqm, qid);
 334         if (!pqn) {
 335                 pr_debug("No queue %d exists for update operation\n", qid);
 336                 return -EFAULT;
 337         }
 338
 339         pqn->q->properties.queue_address = p->queue_address;
 340         pqn->q->properties.queue_size = p->queue_size;
 341         pqn->q->properties.queue_percent = p->queue_percent;
 342         pqn->q->properties.priority = p->priority;
 343
 344         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 345                                                         pqn->q);
 346         if (retval != 0)
 347                 return retval;
 348
 349         return 0;
 350 }
 351
 352 struct kernel_queue *pqm_get_kernel_queue(
 353                                         struct process_queue_manager *pqm,
 354                                         unsigned int qid)
 355 {
 356         struct process_queue_node *pqn;
 357
 358         pqn = get_queue_by_qid(pqm, qid);
 359         if (pqn && pqn->kq)
 360                 return pqn->kq;
 361
 362         return NULL;
 363 }
 364
 365