1/* $NetBSD: kfd_process_queue_manager.c,v 1.3 2021/12/18 23:44:59 riastradh Exp $ */ 2 3/* 4 * Copyright 2014 Advanced Micro Devices, Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 */ 25 26#include <sys/cdefs.h> 27__KERNEL_RCSID(0, "$NetBSD: kfd_process_queue_manager.c,v 1.3 2021/12/18 23:44:59 riastradh Exp $"); 28 29#include <linux/slab.h> 30#include <linux/list.h> 31#include "kfd_device_queue_manager.h" 32#include "kfd_priv.h" 33#include "kfd_kernel_queue.h" 34#include "amdgpu_amdkfd.h" 35 36static inline struct process_queue_node *get_queue_by_qid( 37 struct process_queue_manager *pqm, unsigned int qid) 38{ 39 struct process_queue_node *pqn; 40 41 list_for_each_entry(pqn, &pqm->queues, process_queue_list) { 42 if ((pqn->q && pqn->q->properties.queue_id == qid) || 43 (pqn->kq && pqn->kq->queue->properties.queue_id == qid)) 44 return pqn; 45 } 46 47 return NULL; 48} 49 50static int find_available_queue_slot(struct process_queue_manager *pqm, 51 unsigned int *qid) 52{ 53 unsigned long found; 54 55 found = find_first_zero_bit(pqm->queue_slot_bitmap, 56 KFD_MAX_NUM_OF_QUEUES_PER_PROCESS); 57 58 pr_debug("The new slot id %lu\n", found); 59 60 if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) { 61 pr_info("Cannot open more queues for process with pasid 0x%x\n", 62 pqm->process->pasid); 63 return -ENOMEM; 64 } 65 66 set_bit(found, pqm->queue_slot_bitmap); 67 *qid = found; 68 69 return 0; 70} 71 72void kfd_process_dequeue_from_device(struct kfd_process_device *pdd) 73{ 74 struct kfd_dev *dev = pdd->dev; 75 76 if (pdd->already_dequeued) 77 return; 78 79 dev->dqm->ops.process_termination(dev->dqm, &pdd->qpd); 80 pdd->already_dequeued = true; 81} 82 83int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid, 84 void *gws) 85{ 86 struct kfd_dev *dev = NULL; 87 struct process_queue_node *pqn; 88 struct kfd_process_device *pdd; 89 struct kgd_mem *mem = NULL; 90 int ret; 91 92 pqn = get_queue_by_qid(pqm, qid); 93 if (!pqn) { 94 pr_err("Queue id does not match any known queue\n"); 95 return -EINVAL; 96 } 97 98 if (pqn->q) 99 dev = pqn->q->device; 100 if (WARN_ON(!dev)) 101 return -ENODEV; 102 103 pdd = kfd_get_process_device_data(dev, pqm->process); 104 if (!pdd) { 105 pr_err("Process device data doesn't exist\n"); 106 return -EINVAL; 107 } 108 109 /* Only allow one queue per process can have GWS assigned */ 110 if (gws && pdd->qpd.num_gws) 111 return -EBUSY; 112 113 if (!gws && pdd->qpd.num_gws == 0) 114 return -EINVAL; 115 116 if (gws) 117 ret = amdgpu_amdkfd_add_gws_to_process(pdd->process->kgd_process_info, 118 gws, &mem); 119 else 120 ret = amdgpu_amdkfd_remove_gws_from_process(pdd->process->kgd_process_info, 121 pqn->q->gws); 122 if (unlikely(ret)) 123 return ret; 124 125 pqn->q->gws = mem; 126 pdd->qpd.num_gws = gws ? amdgpu_amdkfd_get_num_gws(dev->kgd) : 0; 127 128 return pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm, 129 pqn->q); 130} 131 132void kfd_process_dequeue_from_all_devices(struct kfd_process *p) 133{ 134 struct kfd_process_device *pdd; 135 136 list_for_each_entry(pdd, &p->per_device_data, per_device_list) 137 kfd_process_dequeue_from_device(pdd); 138} 139 140int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p) 141{ 142 INIT_LIST_HEAD(&pqm->queues); 143 pqm->queue_slot_bitmap = 144 kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS, 145 BITS_PER_BYTE), GFP_KERNEL); 146 if (!pqm->queue_slot_bitmap) 147 return -ENOMEM; 148 pqm->process = p; 149 150 return 0; 151} 152 153void pqm_uninit(struct process_queue_manager *pqm) 154{ 155 struct process_queue_node *pqn, *next; 156 157 list_for_each_entry_safe(pqn, next, &pqm->queues, process_queue_list) { 158 if (pqn->q && pqn->q->gws) 159 amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info, 160 pqn->q->gws); 161 uninit_queue(pqn->q); 162 list_del(&pqn->process_queue_list); 163 kfree(pqn); 164 } 165 166 kfree(pqm->queue_slot_bitmap); 167 pqm->queue_slot_bitmap = NULL; 168} 169 170static int init_user_queue(struct process_queue_manager *pqm, 171 struct kfd_dev *dev, struct queue **q, 172 struct queue_properties *q_properties, 173 struct file *f, unsigned int qid) 174{ 175 int retval; 176 177 /* Doorbell initialized in user space*/ 178 q_properties->doorbell_ptr = NULL; 179 180 /* let DQM handle it*/ 181 q_properties->vmid = 0; 182 q_properties->queue_id = qid; 183 184 retval = init_queue(q, q_properties); 185 if (retval != 0) 186 return retval; 187 188 (*q)->device = dev; 189 (*q)->process = pqm->process; 190 191 pr_debug("PQM After init queue"); 192 193 return retval; 194} 195 196int pqm_create_queue(struct process_queue_manager *pqm, 197 struct kfd_dev *dev, 198 struct file *f, 199 struct queue_properties *properties, 200 unsigned int *qid, 201 uint32_t *p_doorbell_offset_in_process) 202{ 203 int retval; 204 struct kfd_process_device *pdd; 205 struct queue *q; 206 struct process_queue_node *pqn; 207 struct kernel_queue *kq; 208 enum kfd_queue_type type = properties->type; 209 unsigned int max_queues = 127; /* HWS limit */ 210 211 q = NULL; 212 kq = NULL; 213 214 pdd = kfd_get_process_device_data(dev, pqm->process); 215 if (!pdd) { 216 pr_err("Process device data doesn't exist\n"); 217 return -1; 218 } 219 220 /* 221 * for debug process, verify that it is within the static queues limit 222 * currently limit is set to half of the total avail HQD slots 223 * If we are just about to create DIQ, the is_debug flag is not set yet 224 * Hence we also check the type as well 225 */ 226 if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ)) 227 max_queues = dev->device_info->max_no_of_hqd/2; 228 229 if (pdd->qpd.queue_count >= max_queues) 230 return -ENOSPC; 231 232 retval = find_available_queue_slot(pqm, qid); 233 if (retval != 0) 234 return retval; 235 236 if (list_empty(&pdd->qpd.queues_list) && 237 list_empty(&pdd->qpd.priv_queue_list)) 238 dev->dqm->ops.register_process(dev->dqm, &pdd->qpd); 239 240 pqn = kzalloc(sizeof(*pqn), GFP_KERNEL); 241 if (!pqn) { 242 retval = -ENOMEM; 243 goto err_allocate_pqn; 244 } 245 246 switch (type) { 247 case KFD_QUEUE_TYPE_SDMA: 248 case KFD_QUEUE_TYPE_SDMA_XGMI: 249 if ((type == KFD_QUEUE_TYPE_SDMA && dev->dqm->sdma_queue_count 250 >= get_num_sdma_queues(dev->dqm)) || 251 (type == KFD_QUEUE_TYPE_SDMA_XGMI && 252 dev->dqm->xgmi_sdma_queue_count 253 >= get_num_xgmi_sdma_queues(dev->dqm))) { 254 pr_debug("Over-subscription is not allowed for SDMA.\n"); 255 retval = -EPERM; 256 goto err_create_queue; 257 } 258 259 retval = init_user_queue(pqm, dev, &q, properties, f, *qid); 260 if (retval != 0) 261 goto err_create_queue; 262 pqn->q = q; 263 pqn->kq = NULL; 264 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd); 265 pr_debug("DQM returned %d for create_queue\n", retval); 266 print_queue(q); 267 break; 268 269 case KFD_QUEUE_TYPE_COMPUTE: 270 /* check if there is over subscription */ 271 if ((dev->dqm->sched_policy == 272 KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) && 273 ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) || 274 (dev->dqm->queue_count >= get_queues_num(dev->dqm)))) { 275 pr_debug("Over-subscription is not allowed when amdkfd.sched_policy == 1\n"); 276 retval = -EPERM; 277 goto err_create_queue; 278 } 279 280 retval = init_user_queue(pqm, dev, &q, properties, f, *qid); 281 if (retval != 0) 282 goto err_create_queue; 283 pqn->q = q; 284 pqn->kq = NULL; 285 retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd); 286 pr_debug("DQM returned %d for create_queue\n", retval); 287 print_queue(q); 288 break; 289 case KFD_QUEUE_TYPE_DIQ: 290 kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ); 291 if (!kq) { 292 retval = -ENOMEM; 293 goto err_create_queue; 294 } 295 kq->queue->properties.queue_id = *qid; 296 pqn->kq = kq; 297 pqn->q = NULL; 298 retval = dev->dqm->ops.create_kernel_queue(dev->dqm, 299 kq, &pdd->qpd); 300 break; 301 default: 302 WARN(1, "Invalid queue type %d", type); 303 retval = -EINVAL; 304 } 305 306 if (retval != 0) { 307 pr_err("Pasid 0x%x DQM create queue %d failed. ret %d\n", 308 pqm->process->pasid, type, retval); 309 goto err_create_queue; 310 } 311 312 if (q && p_doorbell_offset_in_process) 313 /* Return the doorbell offset within the doorbell page 314 * to the caller so it can be passed up to user mode 315 * (in bytes). 316 * There are always 1024 doorbells per process, so in case 317 * of 8-byte doorbells, there are two doorbell pages per 318 * process. 319 */ 320 *p_doorbell_offset_in_process = 321 (q->properties.doorbell_off * sizeof(uint32_t)) & 322 (kfd_doorbell_process_slice(dev) - 1); 323 324 pr_debug("PQM After DQM create queue\n"); 325 326 list_add(&pqn->process_queue_list, &pqm->queues); 327 328 if (q) { 329 pr_debug("PQM done creating queue\n"); 330 print_queue_properties(&q->properties); 331 } 332 333 return retval; 334 335err_create_queue: 336 kfree(pqn); 337err_allocate_pqn: 338 /* check if queues list is empty unregister process from device */ 339 clear_bit(*qid, pqm->queue_slot_bitmap); 340 if (list_empty(&pdd->qpd.queues_list) && 341 list_empty(&pdd->qpd.priv_queue_list)) 342 dev->dqm->ops.unregister_process(dev->dqm, &pdd->qpd); 343 return retval; 344} 345 346int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid) 347{ 348 struct process_queue_node *pqn; 349 struct kfd_process_device *pdd; 350 struct device_queue_manager *dqm; 351 struct kfd_dev *dev; 352 int retval; 353 354 dqm = NULL; 355 356 retval = 0; 357 358 pqn = get_queue_by_qid(pqm, qid); 359 if (!pqn) { 360 pr_err("Queue id does not match any known queue\n"); 361 return -EINVAL; 362 } 363 364 dev = NULL; 365 if (pqn->kq) 366 dev = pqn->kq->dev; 367 if (pqn->q) 368 dev = pqn->q->device; 369 if (WARN_ON(!dev)) 370 return -ENODEV; 371 372 pdd = kfd_get_process_device_data(dev, pqm->process); 373 if (!pdd) { 374 pr_err("Process device data doesn't exist\n"); 375 return -1; 376 } 377 378 if (pqn->kq) { 379 /* destroy kernel queue (DIQ) */ 380 dqm = pqn->kq->dev->dqm; 381 dqm->ops.destroy_kernel_queue(dqm, pqn->kq, &pdd->qpd); 382 kernel_queue_uninit(pqn->kq, false); 383 } 384 385 if (pqn->q) { 386 dqm = pqn->q->device->dqm; 387 retval = dqm->ops.destroy_queue(dqm, &pdd->qpd, pqn->q); 388 if (retval) { 389 pr_err("Pasid 0x%x destroy queue %d failed, ret %d\n", 390 pqm->process->pasid, 391 pqn->q->properties.queue_id, retval); 392 if (retval != -ETIME) 393 goto err_destroy_queue; 394 } 395 396 if (pqn->q->gws) { 397 amdgpu_amdkfd_remove_gws_from_process(pqm->process->kgd_process_info, 398 pqn->q->gws); 399 pdd->qpd.num_gws = 0; 400 } 401 402 kfree(pqn->q->properties.cu_mask); 403 pqn->q->properties.cu_mask = NULL; 404 uninit_queue(pqn->q); 405 } 406 407 list_del(&pqn->process_queue_list); 408 kfree(pqn); 409 clear_bit(qid, pqm->queue_slot_bitmap); 410 411 if (list_empty(&pdd->qpd.queues_list) && 412 list_empty(&pdd->qpd.priv_queue_list)) 413 dqm->ops.unregister_process(dqm, &pdd->qpd); 414 415err_destroy_queue: 416 return retval; 417} 418 419int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid, 420 struct queue_properties *p) 421{ 422 int retval; 423 struct process_queue_node *pqn; 424 425 pqn = get_queue_by_qid(pqm, qid); 426 if (!pqn) { 427 pr_debug("No queue %d exists for update operation\n", qid); 428 return -EFAULT; 429 } 430 431 pqn->q->properties.queue_address = p->queue_address; 432 pqn->q->properties.queue_size = p->queue_size; 433 pqn->q->properties.queue_percent = p->queue_percent; 434 pqn->q->properties.priority = p->priority; 435 436 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm, 437 pqn->q); 438 if (retval != 0) 439 return retval; 440 441 return 0; 442} 443 444int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid, 445 struct queue_properties *p) 446{ 447 int retval; 448 struct process_queue_node *pqn; 449 450 pqn = get_queue_by_qid(pqm, qid); 451 if (!pqn) { 452 pr_debug("No queue %d exists for update operation\n", qid); 453 return -EFAULT; 454 } 455 456 /* Free the old CU mask memory if it is already allocated, then 457 * allocate memory for the new CU mask. 458 */ 459 kfree(pqn->q->properties.cu_mask); 460 461 pqn->q->properties.cu_mask_count = p->cu_mask_count; 462 pqn->q->properties.cu_mask = p->cu_mask; 463 464 retval = pqn->q->device->dqm->ops.update_queue(pqn->q->device->dqm, 465 pqn->q); 466 if (retval != 0) 467 return retval; 468 469 return 0; 470} 471 472struct kernel_queue *pqm_get_kernel_queue( 473 struct process_queue_manager *pqm, 474 unsigned int qid) 475{ 476 struct process_queue_node *pqn; 477 478 pqn = get_queue_by_qid(pqm, qid); 479 if (pqn && pqn->kq) 480 return pqn->kq; 481 482 return NULL; 483} 484 485int pqm_get_wave_state(struct process_queue_manager *pqm, 486 unsigned int qid, 487 void __user *ctl_stack, 488 u32 *ctl_stack_used_size, 489 u32 *save_area_used_size) 490{ 491 struct process_queue_node *pqn; 492 493 pqn = get_queue_by_qid(pqm, qid); 494 if (!pqn) { 495 pr_debug("amdkfd: No queue %d exists for operation\n", 496 qid); 497 return -EFAULT; 498 } 499 500 return pqn->q->device->dqm->ops.get_wave_state(pqn->q->device->dqm, 501 pqn->q, 502 ctl_stack, 503 ctl_stack_used_size, 504 save_area_used_size); 505} 506 507#if defined(CONFIG_DEBUG_FS) 508 509int pqm_debugfs_mqds(struct seq_file *m, void *data) 510{ 511 struct process_queue_manager *pqm = data; 512 struct process_queue_node *pqn; 513 struct queue *q; 514 enum KFD_MQD_TYPE mqd_type; 515 struct mqd_manager *mqd_mgr; 516 int r = 0; 517 518 list_for_each_entry(pqn, &pqm->queues, process_queue_list) { 519 if (pqn->q) { 520 q = pqn->q; 521 switch (q->properties.type) { 522 case KFD_QUEUE_TYPE_SDMA: 523 case KFD_QUEUE_TYPE_SDMA_XGMI: 524 seq_printf(m, " SDMA queue on device %x\n", 525 q->device->id); 526 mqd_type = KFD_MQD_TYPE_SDMA; 527 break; 528 case KFD_QUEUE_TYPE_COMPUTE: 529 seq_printf(m, " Compute queue on device %x\n", 530 q->device->id); 531 mqd_type = KFD_MQD_TYPE_CP; 532 break; 533 default: 534 seq_printf(m, 535 " Bad user queue type %d on device %x\n", 536 q->properties.type, q->device->id); 537 continue; 538 } 539 mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type]; 540 } else if (pqn->kq) { 541 q = pqn->kq->queue; 542 mqd_mgr = pqn->kq->mqd_mgr; 543 switch (q->properties.type) { 544 case KFD_QUEUE_TYPE_DIQ: 545 seq_printf(m, " DIQ on device %x\n", 546 pqn->kq->dev->id); 547 break; 548 default: 549 seq_printf(m, 550 " Bad kernel queue type %d on device %x\n", 551 q->properties.type, 552 pqn->kq->dev->id); 553 continue; 554 } 555 } else { 556 seq_printf(m, 557 " Weird: Queue node with neither kernel nor user queue\n"); 558 continue; 559 } 560 561 r = mqd_mgr->debugfs_show_mqd(m, q->mqd); 562 if (r != 0) 563 break; 564 } 565 566 return r; 567} 568 569#endif 570