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 #include "amdgpu_amdkfd.h" 30 31 static inline struct process_queue_node *get_queue_by_qid( 32 struct process_queue_manager *pqm, unsigned int qid) 33 { 34 struct process_queue_node *pqn; 35 36 list_for_each_entry(pqn, &pqm->queues, process_queue_list) { 37 if ((pqn->q && pqn->q->properties.queue_id == qid) || 38 (pqn->kq && pqn->kq->queue->properties.queue_id == qid)) 39 return pqn; 40 } 41 42 return NULL; 43 } 44 45 static int find_available_queue_slot(struct process_queue_manager *pqm, 46 unsigned int *qid) 47 { 48 unsigned long found; 49 50 found = find_first_zero_bit(pqm->queue_slot_bitmap, 51 KFD_MAX_NUM_OF_QUEUES_PER_PROCESS); 52 53 pr_debug("The new slot id %lu\n", found); 54 55 if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) { 56 pr_info("Cannot open more queues for process with pasid 0x%x\n", 57 pqm->process->pasid); 58 return -ENOMEM; 59 } 60 61 set_bit(found, pqm->queue_slot_bitmap); 62 *qid = found; 63 64 return 0; 65 } 66 67 void kfd_process_dequeue_from_device(struct kfd_process_device *pdd) 68 { 69 struct kfd_dev *dev = pdd->dev; 70 71 if (pdd->already_dequeued) 72 return; 73 74 dev->dqm->ops.process_termination(dev->dqm, &pdd->qpd); 75 pdd->already_dequeued = true; 76 } 77 78 int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid, 79 void *gws) 80 { 81 struct kfd_dev *dev = NULL; 82 struct process_queue_node *pqn; 83 struct kfd_process_device *pdd; 84 struct kgd_mem *mem = NULL; 85 int ret; 86 87 pqn = get_queue_by_qid(pqm, qid); 88 if (!pqn) { 89 pr_err("Queue id does not match any known queue\n"); 90 return -EINVAL; 91 } 92 93 if (pqn->q) 94 dev = pqn->q->device; 95 if (WARN_ON(!dev)) 96 return -ENODEV; 97 98 pdd = kfd_get_process_device_data(dev, pqm->process); 99 if (!pdd) { 100 pr_err("Process device data doesn't exist\n"); 101 return -EINVAL; 102 } 103 104 /* Only allow one queue per process can have GWS assigned */ 105 if (gws && pdd->qpd.num_gws) 106 return -EBUSY; 107 108 if (!gws && pdd->qpd.num_gws == 0) 109 return -EINVAL; 110 111 if (gws) 112 ret = amdgpu_amdkfd_add_gws_to_process(pdd->process->kgd_process_info, 113 gws, &mem); 114 else 115 ret = amdgpu_amdkfd_remove_gws_from_process(pdd->process->kgd_process_info, 116 pqn->q->gws); 117 if (unlikely(ret)) 118 return ret; 119 120 pqn->q->gws = mem; 121 pdd->qpd.num_gws = gws ? amdgpu_amdkfd_get_num_gws(dev->kgd) : 0; 122 123 return pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm, 124 pqn->q); 125 } 126 127 void kfd_process_dequeue_from_all_devices(struct kfd_process *p) 128 { 129 struct kfd_process_device *pdd; 130 131 list_for_each_entry(pdd, &p->per_device_data, per_device_list) 132 kfd_process_dequeue_from_device(pdd); 133 } 134 135 int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p) 136 { 137 INIT_LIST_HEAD(&pqm->queues); 138 pqm->queue_slot_bitmap = 139 kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS, 140 BITS_PER_BYTE), GFP_KERNEL); 141 if (!pqm->queue_slot_bitmap) 142 return -ENOMEM; 143 pqm->process = p; 144 145 return 0; 146 } 147 148 void pqm_uninit(struct process_queue_manager *pqm) 149 { 150 struct process_queue_node *pqn, *next; 151 152 list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) { 153 if (pqn->q && pqn->q->gws) 154 amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info, 155 pqn->q->gws); 156 uninit_queue(pqn->q); 157 list_del(&pqn->process_queue_list); 158 kfree(pqn); 159 } 160 161 kfree(pqm->queue_slot_bitmap); 162 pqm->queue_slot_bitmap = NULL; 163 } 164 165 static int create_cp_queue(struct process_queue_manager *pqm, 166 struct kfd_dev *dev, struct queue **q, 167 struct queue_properties *q_properties, 168 struct file *f, unsigned int qid) 169 { 170 int retval; 171 172 /* Doorbell initialized in user space*/ 173 q_properties->doorbell_ptr = NULL; 174 175 /* let DQM handle it*/ 176 q_properties->vmid = 0; 177 q_properties->queue_id = qid; 178 179 retval = init_queue(q, q_properties); 180 if (retval != 0) 181 return retval; 182 183 (*q)->device = dev; 184 (*q)->process = pqm->process; 185 186 pr_debug("PQM After init queue"); 187 188 return retval; 189 } 190 191 int pqm_create_queue(struct process_queue_manager *pqm, 192 struct kfd_dev *dev, 193 struct file *f, 194 struct queue_properties *properties, 195 unsigned int *qid) 196 { 197 int retval; 198 struct kfd_process_device *pdd; 199 struct queue *q; 200 struct process_queue_node *pqn; 201 struct kernel_queue *kq; 202 enum kfd_queue_type type = properties->type; 203 unsigned int max_queues = 127; /* HWS limit */ 204 205 q = NULL; 206 kq = NULL; 207 208 pdd = kfd_get_process_device_data(dev, pqm->process); 209 if (!pdd) { 210 pr_err("Process device data doesn't exist\n"); 211 return -1; 212 } 213 214 /* 215 * for debug process, verify that it is within the static queues limit 216 * currently limit is set to half of the total avail HQD slots 217 * If we are just about to create DIQ, the is_debug flag is not set yet 218 * Hence we also check the type as well 219 */ 220 if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ)) 221 max_queues = dev->device_info->max_no_of_hqd/2; 222 223 if (pdd->qpd.queue_count >= max_queues) 224 return -ENOSPC; 225 226 retval = find_available_queue_slot(pqm, qid); 227 if (retval != 0) 228 return retval; 229 230 if (list_empty(&pdd->qpd.queues_list) && 231 list_empty(&pdd->qpd.priv_queue_list)) 232 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd); 233 234 pqn = kzalloc(sizeof(*pqn), GFP_KERNEL); 235 if (!pqn) { 236 retval = -ENOMEM; 237 goto err_allocate_pqn; 238 } 239 240 switch (type) { 241 case KFD_QUEUE_TYPE_SDMA: 242 case KFD_QUEUE_TYPE_SDMA_XGMI: 243 if ((type == KFD_QUEUE_TYPE_SDMA && dev->dqm->sdma_queue_count 244 >= get_num_sdma_queues(dev->dqm)) || 245 (type == KFD_QUEUE_TYPE_SDMA_XGMI && 246 dev->dqm->xgmi_sdma_queue_count 247 >= get_num_xgmi_sdma_queues(dev->dqm))) { 248 pr_debug("Over-subscription is not allowed for SDMA.\n"); 249 retval = -EPERM; 250 goto err_create_queue; 251 } 252 253 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid); 254 if (retval != 0) 255 goto err_create_queue; 256 pqn->q = q; 257 pqn->kq = NULL; 258 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd); 259 pr_debug("DQM returned %d for create_queue\n", retval); 260 print_queue(q); 261 break; 262 263 case KFD_QUEUE_TYPE_COMPUTE: 264 /* check if there is over subscription */ 265 if ((dev->dqm->sched_policy == 266 KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) && 267 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) || 268 (dev->dqm->queue_count >= get_queues_num(dev->dqm)))) { 269 pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n"); 270 retval = -EPERM; 271 goto err_create_queue; 272 } 273 274 retval = create_cp_queue(pqm, dev, &q, properties, f, *qid); 275 if (retval != 0) 276 goto err_create_queue; 277 pqn->q = q; 278 pqn->kq = NULL; 279 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd); 280 pr_debug("DQM returned %d for create_queue\n", retval); 281 print_queue(q); 282 break; 283 case KFD_QUEUE_TYPE_DIQ: 284 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ); 285 if (!kq) { 286 retval = -ENOMEM; 287 goto err_create_queue; 288 } 289 kq->queue->properties.queue_id = *qid; 290 pqn->kq = kq; 291 pqn->q = NULL; 292 retval = dev->dqm->ops.create_kernel_queue(dev->dqm, 293 kq, &pdd->qpd); 294 break; 295 default: 296 WARN(1, "Invalid queue type %d", type); 297 retval = -EINVAL; 298 } 299 300 if (retval != 0) { 301 pr_err("Pasid 0x%x DQM create queue %d failed. ret %d\n", 302 pqm->process->pasid, type, retval); 303 goto err_create_queue; 304 } 305 306 if (q) 307 /* Return the doorbell offset within the doorbell page 308 * to the caller so it can be passed up to user mode 309 * (in bytes). 310 */ 311 properties->doorbell_off = 312 (q->properties.doorbell_off * sizeof(uint32_t)) & 313 (kfd_doorbell_process_slice(dev) - 1); 314 315 pr_debug("PQM After DQM create queue\n"); 316 317 list_add(&pqn->process_queue_list, &pqm->queues); 318 319 if (q) { 320 pr_debug("PQM done creating queue\n"); 321 print_queue_properties(&q->properties); 322 } 323 324 return retval; 325 326 err_create_queue: 327 kfree(pqn); 328 err_allocate_pqn: 329 /* check if queues list is empty unregister process from device */ 330 clear_bit(*qid, pqm->queue_slot_bitmap); 331 if (list_empty(&pdd->qpd.queues_list) && 332 list_empty(&pdd->qpd.priv_queue_list)) 333 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd); 334 return retval; 335 } 336 337 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid) 338 { 339 struct process_queue_node *pqn; 340 struct kfd_process_device *pdd; 341 struct device_queue_manager *dqm; 342 struct kfd_dev *dev; 343 int retval; 344 345 dqm = NULL; 346 347 retval = 0; 348 349 pqn = get_queue_by_qid(pqm, qid); 350 if (!pqn) { 351 pr_err("Queue id does not match any known queue\n"); 352 return -EINVAL; 353 } 354 355 dev = NULL; 356 if (pqn->kq) 357 dev = pqn->kq->dev; 358 if (pqn->q) 359 dev = pqn->q->device; 360 if (WARN_ON(!dev)) 361 return -ENODEV; 362 363 pdd = kfd_get_process_device_data(dev, pqm->process); 364 if (!pdd) { 365 pr_err("Process device data doesn't exist\n"); 366 return -1; 367 } 368 369 if (pqn->kq) { 370 /* destroy kernel queue (DIQ) */ 371 dqm = pqn->kq->dev->dqm; 372 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd); 373 kernel_queue_uninit(pqn->kq); 374 } 375 376 if (pqn->q) { 377 dqm = pqn->q->device->dqm; 378 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q); 379 if (retval) { 380 pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n", 381 pqm->process->pasid, 382 pqn->q->properties.queue_id, retval); 383 if (retval != -ETIME) 384 goto err_destroy_queue; 385 } 386 387 if (pqn->q->gws) { 388 amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info, 389 pqn->q->gws); 390 pdd->qpd.num_gws = 0; 391 } 392 393 kfree(pqn->q->properties.cu_mask); 394 pqn->q->properties.cu_mask = NULL; 395 uninit_queue(pqn->q); 396 } 397 398 list_del(&pqn->process_queue_list); 399 kfree(pqn); 400 clear_bit(qid, pqm->queue_slot_bitmap); 401 402 if (list_empty(&pdd->qpd.queues_list) && 403 list_empty(&pdd->qpd.priv_queue_list)) 404 dqm->ops.unregister_process(dqm, &pdd->qpd); 405 406 err_destroy_queue: 407 return retval; 408 } 409 410 int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid, 411 struct queue_properties *p) 412 { 413 int retval; 414 struct process_queue_node *pqn; 415 416 pqn = get_queue_by_qid(pqm, qid); 417 if (!pqn) { 418 pr_debug("No queue %d exists for update operation\n", qid); 419 return -EFAULT; 420 } 421 422 pqn->q->properties.queue_address = p->queue_address; 423 pqn->q->properties.queue_size = p->queue_size; 424 pqn->q->properties.queue_percent = p->queue_percent; 425 pqn->q->properties.priority = p->priority; 426 427 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm, 428 pqn->q); 429 if (retval != 0) 430 return retval; 431 432 return 0; 433 } 434 435 int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid, 436 struct queue_properties *p) 437 { 438 int retval; 439 struct process_queue_node *pqn; 440 441 pqn = get_queue_by_qid(pqm, qid); 442 if (!pqn) { 443 pr_debug("No queue %d exists for update operation\n", qid); 444 return -EFAULT; 445 } 446 447 /* Free the old CU mask memory if it is already allocated, then 448 * allocate memory for the new CU mask. 449 */ 450 kfree(pqn->q->properties.cu_mask); 451 452 pqn->q->properties.cu_mask_count = p->cu_mask_count; 453 pqn->q->properties.cu_mask = p->cu_mask; 454 455 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm, 456 pqn->q); 457 if (retval != 0) 458 return retval; 459 460 return 0; 461 } 462 463 struct kernel_queue *pqm_get_kernel_queue( 464 struct process_queue_manager *pqm, 465 unsigned int qid) 466 { 467 struct process_queue_node *pqn; 468 469 pqn = get_queue_by_qid(pqm, qid); 470 if (pqn && pqn->kq) 471 return pqn->kq; 472 473 return NULL; 474 } 475 476 int pqm_get_wave_state(struct process_queue_manager *pqm, 477 unsigned int qid, 478 void __user *ctl_stack, 479 u32 *ctl_stack_used_size, 480 u32 *save_area_used_size) 481 { 482 struct process_queue_node *pqn; 483 484 pqn = get_queue_by_qid(pqm, qid); 485 if (!pqn) { 486 pr_debug("amdkfd: No queue %d exists for operation\n", 487 qid); 488 return -EFAULT; 489 } 490 491 return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm, 492 pqn->q, 493 ctl_stack, 494 ctl_stack_used_size, 495 save_area_used_size); 496 } 497 498 #if defined(CONFIG_DEBUG_FS) 499 500 int pqm_debugfs_mqds(struct seq_file *m, void *data) 501 { 502 struct process_queue_manager *pqm = data; 503 struct process_queue_node *pqn; 504 struct queue *q; 505 enum KFD_MQD_TYPE mqd_type; 506 struct mqd_manager *mqd_mgr; 507 int r = 0; 508 509 list_for_each_entry(pqn, &pqm->queues, process_queue_list) { 510 if (pqn->q) { 511 q = pqn->q; 512 switch (q->properties.type) { 513 case KFD_QUEUE_TYPE_SDMA: 514 case KFD_QUEUE_TYPE_SDMA_XGMI: 515 seq_printf(m, " SDMA queue on device %x\n", 516 q->device->id); 517 mqd_type = KFD_MQD_TYPE_SDMA; 518 break; 519 case KFD_QUEUE_TYPE_COMPUTE: 520 seq_printf(m, " Compute queue on device %x\n", 521 q->device->id); 522 mqd_type = KFD_MQD_TYPE_CP; 523 break; 524 default: 525 seq_printf(m, 526 " Bad user queue type %d on device %x\n", 527 q->properties.type, q->device->id); 528 continue; 529 } 530 mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type]; 531 } else if (pqn->kq) { 532 q = pqn->kq->queue; 533 mqd_mgr = pqn->kq->mqd_mgr; 534 switch (q->properties.type) { 535 case KFD_QUEUE_TYPE_DIQ: 536 seq_printf(m, " DIQ on device %x\n", 537 pqn->kq->dev->id); 538 break; 539 default: 540 seq_printf(m, 541 " Bad kernel queue type %d on device %x\n", 542 q->properties.type, 543 pqn->kq->dev->id); 544 continue; 545 } 546 } else { 547 seq_printf(m, 548 " Weird: Queue node with neither kernel nor user queue\n"); 549 continue; 550 } 551 552 r = mqd_mgr->debugfs_show_mqd(m, q->mqd); 553 if (r != 0) 554 break; 555 } 556 557 return r; 558 } 559 560 #endif 561