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                 pdd->qpd.pqm = pqm;
 183                 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd);
 184         }
 185
 186         pqn = kzalloc(sizeof(*pqn), GFP_KERNEL);
 187         if (!pqn) {
 188                 retval = -ENOMEM;
 189                 goto err_allocate_pqn;
 190         }
 191
 192         switch (type) {
 193         case KFD_QUEUE_TYPE_SDMA:
 194         case KFD_QUEUE_TYPE_COMPUTE:
 195                 /* check if there is over subscription */
 196                 if ((sched_policy == KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 197                 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
 198                 (dev->dqm->queue_count >= get_queues_num(dev->dqm)))) {
 199                         pr_err("Over-subscription is not allowed in radeon_kfd.sched_policy == 1\n");
 200                         retval = -EPERM;
 201                         goto err_create_queue;
 202                 }
 203
 204                 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);
 205                 if (retval != 0)
 206                         goto err_create_queue;
 207                 pqn->q = q;
 208                 pqn->kq = NULL;
 209                 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd,
 210                                                 &q->properties.vmid);
 211                 pr_debug("DQM returned %d for create_queue\n", retval);
 212                 print_queue(q);
 213                 break;
 214         case KFD_QUEUE_TYPE_DIQ:
 215                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 216                 if (!kq) {
 217                         retval = -ENOMEM;
 218                         goto err_create_queue;
 219                 }
 220                 kq->queue->properties.queue_id = *qid;
 221                 pqn->kq = kq;
 222                 pqn->q = NULL;
 223                 retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
 224                                                         kq, &pdd->qpd);
 225                 break;
 226         default:
 227                 WARN(1, "Invalid queue type %d", type);
 228                 retval = -EINVAL;
 229         }
 230
 231         if (retval != 0) {
 232                 pr_err("DQM create queue failed\n");
 233                 goto err_create_queue;
 234         }
 235
 236         pr_debug("PQM After DQM create queue\n");
 237
 238         list_add(&pqn->process_queue_list, &pqm->queues);
 239
 240         if (q) {
 241                 pr_debug("PQM done creating queue\n");
 242                 print_queue_properties(&q->properties);
 243         }
 244
 245         return retval;
 246
 247 err_create_queue:
 248         kfree(pqn);
 249 err_allocate_pqn:
 250         /* check if queues list is empty unregister process from device */
 251         clear_bit(*qid, pqm->queue_slot_bitmap);
 252         if (list_empty(&pdd->qpd.queues_list) &&
 253             list_empty(&pdd->qpd.priv_queue_list))
 254                 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd);
 255         return retval;
 256 }
 257
 258 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 259 {
 260         struct process_queue_node *pqn;
 261         struct kfd_process_device *pdd;
 262         struct device_queue_manager *dqm;
 263         struct kfd_dev *dev;
 264         int retval;
 265
 266         dqm = NULL;
 267
 268         retval = 0;
 269
 270         pqn = get_queue_by_qid(pqm, qid);
 271         if (!pqn) {
 272                 pr_err("Queue id does not match any known queue\n");
 273                 return -EINVAL;
 274         }
 275
 276         dev = NULL;
 277         if (pqn->kq)
 278                 dev = pqn->kq->dev;
 279         if (pqn->q)
 280                 dev = pqn->q->device;
 281         if (WARN_ON(!dev))
 282                 return -ENODEV;
 283
 284         pdd = kfd_get_process_device_data(dev, pqm->process);
 285         if (!pdd) {
 286                 pr_err("Process device data doesn't exist\n");
 287                 return -1;
 288         }
 289
 290         if (pqn->kq) {
 291                 /* destroy kernel queue (DIQ) */
 292                 dqm = pqn->kq->dev->dqm;
 293                 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 294                 kernel_queue_uninit(pqn->kq);
 295         }
 296
 297         if (pqn->q) {
 298                 dqm = pqn->q->device->dqm;
 299                 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q);
 300                 uninit_queue(pqn->q);
 301         }
 302
 303         list_del(&pqn->process_queue_list);
 304         kfree(pqn);
 305         clear_bit(qid, pqm->queue_slot_bitmap);
 306
 307         if (list_empty(&pdd->qpd.queues_list) &&
 308             list_empty(&pdd->qpd.priv_queue_list))
 309                 dqm->ops.unregister_process(dqm, &pdd->qpd);
 310
 311         return retval;
 312 }
 313
 314 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 315                         struct queue_properties *p)
 316 {
 317         int retval;
 318         struct process_queue_node *pqn;
 319
 320         pqn = get_queue_by_qid(pqm, qid);
 321         if (!pqn) {
 322                 pr_debug("No queue %d exists for update operation\n", qid);
 323                 return -EFAULT;
 324         }
 325
 326         pqn->q->properties.queue_address = p->queue_address;
 327         pqn->q->properties.queue_size = p->queue_size;
 328         pqn->q->properties.queue_percent = p->queue_percent;
 329         pqn->q->properties.priority = p->priority;
 330
 331         retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm,
 332                                                         pqn->q);
 333         if (retval != 0)
 334                 return retval;
 335
 336         return 0;
 337 }
 338
 339 struct kernel_queue *pqm_get_kernel_queue(
 340                                         struct process_queue_manager *pqm,
 341                                         unsigned int qid)
 342 {
 343         struct process_queue_node *pqn;
 344
 345         pqn = get_queue_by_qid(pqm, qid);
 346         if (pqn && pqn->kq)
 347                 return pqn->kq;
 348
 349         return NULL;
 350 }
 351
 352