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         BUG_ON(!pqm);
  36
  37         list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
  38                 if (pqn->q && pqn->q->properties.queue_id == qid)
  39                         return pqn;
  40                 if (pqn->kq && pqn->kq->queue->properties.queue_id == qid)
  41                         return pqn;
  42         }
  43
  44         return NULL;
  45 }
  46
  47 static int find_available_queue_slot(struct process_queue_manager *pqm,
  48                                         unsigned int *qid)
  49 {
  50         unsigned long found;
  51
  52         BUG_ON(!pqm || !qid);
  53
  54         pr_debug("kfd: in %s\n", __func__);
  55
  56         found = find_first_zero_bit(pqm->queue_slot_bitmap,
  57                         KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
  58
  59         pr_debug("kfd: the new slot id %lu\n", found);
  60
  61         if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) {
  62                 pr_info("amdkfd: Can not open more queues for process with pasid %d\n",
  63                                 pqm->process->pasid);
  64                 return -ENOMEM;
  65         }
  66
  67         set_bit(found, pqm->queue_slot_bitmap);
  68         *qid = found;
  69
  70         return 0;
  71 }
  72
  73 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
  74 {
  75         BUG_ON(!pqm);
  76
  77         INIT_LIST_HEAD(&pqm->queues);
  78         pqm->queue_slot_bitmap =
  79                         kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
  80                                         BITS_PER_BYTE), GFP_KERNEL);
  81         if (pqm->queue_slot_bitmap == NULL)
  82                 return -ENOMEM;
  83         pqm->process = p;
  84
  85         return 0;
  86 }
  87
  88 void pqm_uninit(struct process_queue_manager *pqm)
  89 {
  90         int retval;
  91         struct process_queue_node *pqn, *next;
  92
  93         BUG_ON(!pqm);
  94
  95         pr_debug("In func %s\n", __func__);
  96
  97         list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) {
  98                 retval = pqm_destroy_queue(
  99                                 pqm,
 100                                 (pqn->q != NULL) ?
 101                                         pqn->q->properties.queue_id :
 102                                         pqn->kq->queue->properties.queue_id);
 103
 104                 if (retval != 0) {
 105                         pr_err("kfd: failed to destroy queue\n");
 106                         return;
 107                 }
 108         }
 109         kfree(pqm->queue_slot_bitmap);
 110         pqm->queue_slot_bitmap = NULL;
 111 }
 112
 113 static int create_cp_queue(struct process_queue_manager *pqm,
 114                                 struct kfd_dev *dev, struct queue **q,
 115                                 struct queue_properties *q_properties,
 116                                 struct file *f, unsigned int qid)
 117 {
 118         int retval;
 119
 120         retval = 0;
 121
 122         /* Doorbell initialized in user space*/
 123         q_properties->doorbell_ptr = NULL;
 124
 125         q_properties->doorbell_off =
 126                         kfd_queue_id_to_doorbell(dev, pqm->process, qid);
 127
 128         /* let DQM handle it*/
 129         q_properties->vmid = 0;
 130         q_properties->queue_id = qid;
 131
 132         retval = init_queue(q, *q_properties);
 133         if (retval != 0)
 134                 goto err_init_queue;
 135
 136         (*q)->device = dev;
 137         (*q)->process = pqm->process;
 138
 139         pr_debug("kfd: PQM After init queue");
 140
 141         return retval;
 142
 143 err_init_queue:
 144         return retval;
 145 }
 146
 147 int pqm_create_queue(struct process_queue_manager *pqm,
 148                             struct kfd_dev *dev,
 149                             struct file *f,
 150                             struct queue_properties *properties,
 151                             unsigned int flags,
 152                             enum kfd_queue_type type,
 153                             unsigned int *qid)
 154 {
 155         int retval;
 156         struct kfd_process_device *pdd;
 157         struct queue_properties q_properties;
 158         struct queue *q;
 159         struct process_queue_node *pqn;
 160         struct kernel_queue *kq;
 161         int num_queues = 0;
 162         struct queue *cur;
 163
 164         BUG_ON(!pqm || !dev || !properties || !qid);
 165
 166         memset(&q_properties, 0, sizeof(struct queue_properties));
 167         memcpy(&q_properties, properties, sizeof(struct queue_properties));
 168         q = NULL;
 169         kq = NULL;
 170
 171         pdd = kfd_get_process_device_data(dev, pqm->process);
 172         if (!pdd) {
 173                 pr_err("Process device data doesn't exist\n");
 174                 return -1;
 175         }
 176
 177         /*
 178          * for debug process, verify that it is within the static queues limit
 179          * currently limit is set to half of the total avail HQD slots
 180          * If we are just about to create DIQ, the is_debug flag is not set yet
 181          * Hence we also check the type as well
 182          */
 183         if ((pdd->qpd.is_debug) ||
 184                 (type == KFD_QUEUE_TYPE_DIQ)) {
 185                 list_for_each_entry(cur, &pdd->qpd.queues_list, list)
 186                         num_queues++;
 187                 if (num_queues >= dev->device_info->max_no_of_hqd/2)
 188                         return (-ENOSPC);
 189         }
 190
 191         retval = find_available_queue_slot(pqm, qid);
 192         if (retval != 0)
 193                 return retval;
 194
 195         if (list_empty(&pqm->queues)) {
 196                 pdd->qpd.pqm = pqm;
 197                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 198         }
 199
 200         pqn = kzalloc(sizeof(struct process_queue_node), GFP_KERNEL);
 201         if (!pqn) {
 202                 retval = -ENOMEM;
 203                 goto err_allocate_pqn;
 204         }
 205
 206         switch (type) {
 207         case KFD_QUEUE_TYPE_SDMA:
 208         case KFD_QUEUE_TYPE_COMPUTE:
 209                 /* check if there is over subscription */
 210                 if ((sched_policy == KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 211                 ((dev->dqm->processes_count >= VMID_PER_DEVICE) ||
 212                 (dev->dqm->queue_count >= PIPE_PER_ME_CP_SCHEDULING * QUEUES_PER_PIPE))) {
 213                         pr_err("kfd: over-subscription is not allowed in radeon_kfd.sched_policy == 1\n");
 214                         retval = -EPERM;
 215                         goto err_create_queue;
 216                 }
 217
 218                 retval = create_cp_queue(pqm, dev, &q, &q_properties, f, *qid);
 219                 if (retval != 0)
 220                         goto err_create_queue;
 221                 pqn->q = q;
 222                 pqn->kq = NULL;
 223                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd,
 224                                                 &q->properties.vmid);
 225                 pr_debug("DQM returned %d for create_queue\n", retval);
 226                 print_queue(q);
 227                 break;
 228         case KFD_QUEUE_TYPE_DIQ:
 229                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 230                 if (kq == NULL) {
 231                         retval = -ENOMEM;
 232                         goto err_create_queue;
 233                 }
 234                 kq->queue->properties.queue_id = *qid;
 235                 pqn->kq = kq;
 236                 pqn->q = NULL;
 237                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 238                                                         kq, &pdd->qpd);
 239                 break;
 240         default:
 241                 BUG();
 242                 break;
 243         }
 244
 245         if (retval != 0) {
 246                 pr_debug("Error dqm create queue\n");
 247                 goto err_create_queue;
 248         }
 249
 250         pr_debug("kfd: PQM After DQM create queue\n");
 251
 252         list_add(&pqn->process_queue_list, &pqm->queues);
 253
 254         if (q) {
 255                 *properties = q->properties;
 256                 pr_debug("kfd: PQM done creating queue\n");
 257                 print_queue_properties(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(&pqm->queues))
 268                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 269         return retval;
 270 }
 271
 272 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 273 {
 274         struct process_queue_node *pqn;
 275         struct kfd_process_device *pdd;
 276         struct device_queue_manager *dqm;
 277         struct kfd_dev *dev;
 278         int retval;
 279
 280         dqm = NULL;
 281
 282         BUG_ON(!pqm);
 283         retval = 0;
 284
 285         pr_debug("kfd: In Func %s\n", __func__);
 286
 287         pqn = get_queue_by_qid(pqm, qid);
 288         if (pqn == NULL) {
 289                 pr_err("kfd: queue id does not match any known queue\n");
 290                 return -EINVAL;
 291         }
 292
 293         dev = NULL;
 294         if (pqn->kq)
 295                 dev = pqn->kq->dev;
 296         if (pqn->q)
 297                 dev = pqn->q->device;
 298         BUG_ON(!dev);
 299
 300         pdd = kfd_get_process_device_data(dev, pqm->process);
 301         if (!pdd) {
 302                 pr_err("Process device data doesn't exist\n");
 303                 return -1;
 304         }
 305
 306         if (pqn->kq) {
 307                 /* destroy kernel queue (DIQ) */
 308                 dqm = pqn->kq->dev->dqm;
 309                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 310                 kernel_queue_uninit(pqn->kq);
 311         }
 312
 313         if (pqn->q) {
 314                 dqm = pqn->q->device->dqm;
 315                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 316                 if (retval != 0)
 317                         return retval;
 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(&pqm->queues))
 327                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 328
 329         return retval;
 330 }
 331
 332 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 333                         struct queue_properties *p)
 334 {
 335         int retval;
 336         struct process_queue_node *pqn;
 337
 338         BUG_ON(!pqm);
 339
 340         pqn = get_queue_by_qid(pqm, qid);
 341         if (!pqn) {
 342                 pr_debug("amdkfd: No queue %d exists for update operation\n",
 343                                 qid);
 344                 return -EFAULT;
 345         }
 346
 347         pqn->q->properties.queue_address = p->queue_address;
 348         pqn->q->properties.queue_size = p->queue_size;
 349         pqn->q->properties.queue_percent = p->queue_percent;
 350         pqn->q->properties.priority = p->priority;
 351
 352         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 353                                                         pqn->q);
 354         if (retval != 0)
 355                 return retval;
 356
 357         return 0;
 358 }
 359
 360 struct kernel_queue *pqm_get_kernel_queue(
 361                                         struct process_queue_manager *pqm,
 362                                         unsigned int qid)
 363 {
 364         struct process_queue_node *pqn;
 365
 366         BUG_ON(!pqm);
 367
 368         pqn = get_queue_by_qid(pqm, qid);
 369         if (pqn && pqn->kq)
 370                 return pqn->kq;
 371
 372         return NULL;
 373 }
 374
 375