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         q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
 132
 133         retval = init_queue(q, *q_properties);
 134         if (retval != 0)
 135                 goto err_init_queue;
 136
 137         (*q)->device = dev;
 138         (*q)->process = pqm->process;
 139
 140         pr_debug("kfd: PQM After init queue");
 141
 142         return retval;
 143
 144 err_init_queue:
 145         return retval;
 146 }
 147
 148 int pqm_create_queue(struct process_queue_manager *pqm,
 149                             struct kfd_dev *dev,
 150                             struct file *f,
 151                             struct queue_properties *properties,
 152                             unsigned int flags,
 153                             enum kfd_queue_type type,
 154                             unsigned int *qid)
 155 {
 156         int retval;
 157         struct kfd_process_device *pdd;
 158         struct queue_properties q_properties;
 159         struct queue *q;
 160         struct process_queue_node *pqn;
 161         struct kernel_queue *kq;
 162
 163         BUG_ON(!pqm || !dev || !properties || !qid);
 164
 165         memset(&q_properties, 0, sizeof(struct queue_properties));
 166         memcpy(&q_properties, properties, sizeof(struct queue_properties));
 167         q = NULL;
 168         kq = NULL;
 169
 170         pdd = kfd_get_process_device_data(dev, pqm->process, 1);
 171         BUG_ON(!pdd);
 172
 173         retval = find_available_queue_slot(pqm, qid);
 174         if (retval != 0)
 175                 return retval;
 176
 177         if (list_empty(&pqm->queues)) {
 178                 pdd->qpd.pqm = pqm;
 179                 dev->dqm->register_process(dev->dqm, &pdd->qpd);
 180         }
 181
 182         pqn = kzalloc(sizeof(struct process_queue_node), GFP_KERNEL);
 183         if (!pqn) {
 184                 retval = -ENOMEM;
 185                 goto err_allocate_pqn;
 186         }
 187
 188         switch (type) {
 189         case KFD_QUEUE_TYPE_COMPUTE:
 190                 /* check if there is over subscription */
 191                 if ((sched_policy == KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
 192                 ((dev->dqm->processes_count >= VMID_PER_DEVICE) ||
 193                 (dev->dqm->queue_count >= PIPE_PER_ME_CP_SCHEDULING * QUEUES_PER_PIPE))) {
 194                         pr_err("kfd: over-subscription is not allowed in radeon_kfd.sched_policy == 1\n");
 195                         retval = -EPERM;
 196                         goto err_create_queue;
 197                 }
 198
 199                 retval = create_cp_queue(pqm, dev, &q, &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->create_queue(dev->dqm, q, &pdd->qpd,
 205                                                 &q->properties.vmid);
 206                 pr_debug("DQM returned %d for create_queue\n", retval);
 207                 print_queue(q);
 208                 break;
 209         case KFD_QUEUE_TYPE_DIQ:
 210                 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
 211                 if (kq == NULL) {
 212                         retval = -ENOMEM;
 213                         goto err_create_queue;
 214                 }
 215                 kq->queue->properties.queue_id = *qid;
 216                 pqn->kq = kq;
 217                 pqn->q = NULL;
 218                 retval = dev->dqm->create_kernel_queue(dev->dqm, kq, &pdd->qpd);
 219                 break;
 220         default:
 221                 BUG();
 222                 break;
 223         }
 224
 225         if (retval != 0) {
 226                 pr_debug("Error dqm create queue\n");
 227                 goto err_create_queue;
 228         }
 229
 230         pr_debug("kfd: PQM After DQM create queue\n");
 231
 232         list_add(&pqn->process_queue_list, &pqm->queues);
 233
 234         if (q) {
 235                 *properties = q->properties;
 236                 pr_debug("kfd: PQM done creating queue\n");
 237                 print_queue_properties(properties);
 238         }
 239
 240         return retval;
 241
 242 err_create_queue:
 243         kfree(pqn);
 244 err_allocate_pqn:
 245         /* check if queues list is empty unregister process from device */
 246         clear_bit(*qid, pqm->queue_slot_bitmap);
 247         if (list_empty(&pqm->queues))
 248                 dev->dqm->unregister_process(dev->dqm, &pdd->qpd);
 249         return retval;
 250 }
 251
 252 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
 253 {
 254         struct process_queue_node *pqn;
 255         struct kfd_process_device *pdd;
 256         struct device_queue_manager *dqm;
 257         struct kfd_dev *dev;
 258         int retval;
 259
 260         dqm = NULL;
 261
 262         BUG_ON(!pqm);
 263         retval = 0;
 264
 265         pr_debug("kfd: In Func %s\n", __func__);
 266
 267         pqn = get_queue_by_qid(pqm, qid);
 268         if (pqn == NULL) {
 269                 pr_err("kfd: queue id does not match any known queue\n");
 270                 return -EINVAL;
 271         }
 272
 273         dev = NULL;
 274         if (pqn->kq)
 275                 dev = pqn->kq->dev;
 276         if (pqn->q)
 277                 dev = pqn->q->device;
 278         BUG_ON(!dev);
 279
 280         pdd = kfd_get_process_device_data(dev, pqm->process, 1);
 281         BUG_ON(!pdd);
 282
 283         if (pqn->kq) {
 284                 /* destroy kernel queue (DIQ) */
 285                 dqm = pqn->kq->dev->dqm;
 286                 dqm->destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd);
 287                 kernel_queue_uninit(pqn->kq);
 288         }
 289
 290         if (pqn->q) {
 291                 dqm = pqn->q->device->dqm;
 292                 retval = dqm->destroy_queue(dqm, &pdd->qpd, pqn->q);
 293                 if (retval != 0)
 294                         return retval;
 295
 296                 uninit_queue(pqn->q);
 297         }
 298
 299         list_del(&pqn->process_queue_list);
 300         kfree(pqn);
 301         clear_bit(qid, pqm->queue_slot_bitmap);
 302
 303         if (list_empty(&pqm->queues))
 304                 dqm->unregister_process(dqm, &pdd->qpd);
 305
 306         return retval;
 307 }
 308
 309 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 310                         struct queue_properties *p)
 311 {
 312         int retval;
 313         struct process_queue_node *pqn;
 314
 315         BUG_ON(!pqm);
 316
 317         pqn = get_queue_by_qid(pqm, qid);
 318         if (!pqn) {
 319                 pr_debug("amdkfd: No queue %d exists for update operation\n",
 320                                 qid);
 321                 return -EFAULT;
 322         }
 323
 324         pqn->q->properties.queue_address = p->queue_address;
 325         pqn->q->properties.queue_size = p->queue_size;
 326         pqn->q->properties.queue_percent = p->queue_percent;
 327         pqn->q->properties.priority = p->priority;
 328
 329         retval = pqn->q->device->dqm->update_queue(pqn->q->device->dqm, pqn->q);
 330         if (retval != 0)
 331                 return retval;
 332
 333         return 0;
 334 }
 335
 336 static __attribute__((unused)) struct kernel_queue *pqm_get_kernel_queue(
 337                                         struct process_queue_manager *pqm,
 338                                         unsigned int qid)
 339 {
 340         struct process_queue_node *pqn;
 341
 342         BUG_ON(!pqm);
 343
 344         pqn = get_queue_by_qid(pqm, qid);
 345         if (pqn && pqn->kq)
 346                 return pqn->kq;
 347
 348         return NULL;
 349 }
 350
 351