1 // SPDX-License-Identifier: GPL-2.0 OR MIT 2 /* 3 * Copyright 2014-2022 Advanced Micro Devices, Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 21 * OTHER DEALINGS IN THE SOFTWARE. 22 */ 23 24 #include <linux/device.h> 25 #include <linux/export.h> 26 #include <linux/err.h> 27 #include <linux/fs.h> 28 #include <linux/file.h> 29 #include <linux/sched.h> 30 #include <linux/slab.h> 31 #include <linux/uaccess.h> 32 #include <linux/compat.h> 33 #include <uapi/linux/kfd_ioctl.h> 34 #include <linux/time.h> 35 #include <linux/mm.h> 36 #include <linux/mman.h> 37 #include <linux/ptrace.h> 38 #include <linux/dma-buf.h> 39 #include <linux/fdtable.h> 40 #include <linux/processor.h> 41 #include "kfd_priv.h" 42 #include "kfd_device_queue_manager.h" 43 #include "kfd_svm.h" 44 #include "amdgpu_amdkfd.h" 45 #include "kfd_smi_events.h" 46 #include "amdgpu_dma_buf.h" 47 #include "kfd_debug.h" 48 49 static long kfd_ioctl(struct file *, unsigned int, unsigned long); 50 static int kfd_open(struct inode *, struct file *); 51 static int kfd_release(struct inode *, struct file *); 52 static int kfd_mmap(struct file *, struct vm_area_struct *); 53 54 static const char kfd_dev_name[] = "kfd"; 55 56 static const struct file_operations kfd_fops = { 57 .owner = THIS_MODULE, 58 .unlocked_ioctl = kfd_ioctl, 59 .compat_ioctl = compat_ptr_ioctl, 60 .open = kfd_open, 61 .release = kfd_release, 62 .mmap = kfd_mmap, 63 }; 64 65 static int kfd_char_dev_major = -1; 66 static struct class *kfd_class; 67 struct device *kfd_device; 68 69 static inline struct kfd_process_device *kfd_lock_pdd_by_id(struct kfd_process *p, __u32 gpu_id) 70 { 71 struct kfd_process_device *pdd; 72 73 mutex_lock(&p->mutex); 74 pdd = kfd_process_device_data_by_id(p, gpu_id); 75 76 if (pdd) 77 return pdd; 78 79 mutex_unlock(&p->mutex); 80 return NULL; 81 } 82 83 static inline void kfd_unlock_pdd(struct kfd_process_device *pdd) 84 { 85 mutex_unlock(&pdd->process->mutex); 86 } 87 88 int kfd_chardev_init(void) 89 { 90 int err = 0; 91 92 kfd_char_dev_major = register_chrdev(0, kfd_dev_name, &kfd_fops); 93 err = kfd_char_dev_major; 94 if (err < 0) 95 goto err_register_chrdev; 96 97 kfd_class = class_create(kfd_dev_name); 98 err = PTR_ERR(kfd_class); 99 if (IS_ERR(kfd_class)) 100 goto err_class_create; 101 102 kfd_device = device_create(kfd_class, NULL, 103 MKDEV(kfd_char_dev_major, 0), 104 NULL, kfd_dev_name); 105 err = PTR_ERR(kfd_device); 106 if (IS_ERR(kfd_device)) 107 goto err_device_create; 108 109 return 0; 110 111 err_device_create: 112 class_destroy(kfd_class); 113 err_class_create: 114 unregister_chrdev(kfd_char_dev_major, kfd_dev_name); 115 err_register_chrdev: 116 return err; 117 } 118 119 void kfd_chardev_exit(void) 120 { 121 device_destroy(kfd_class, MKDEV(kfd_char_dev_major, 0)); 122 class_destroy(kfd_class); 123 unregister_chrdev(kfd_char_dev_major, kfd_dev_name); 124 kfd_device = NULL; 125 } 126 127 128 static int kfd_open(struct inode *inode, struct file *filep) 129 { 130 struct kfd_process *process; 131 bool is_32bit_user_mode; 132 133 if (iminor(inode) != 0) 134 return -ENODEV; 135 136 is_32bit_user_mode = in_compat_syscall(); 137 138 if (is_32bit_user_mode) { 139 dev_warn(kfd_device, 140 "Process %d (32-bit) failed to open /dev/kfd\n" 141 "32-bit processes are not supported by amdkfd\n", 142 current->pid); 143 return -EPERM; 144 } 145 146 process = kfd_create_process(current); 147 if (IS_ERR(process)) 148 return PTR_ERR(process); 149 150 if (kfd_process_init_cwsr_apu(process, filep)) { 151 kfd_unref_process(process); 152 return -EFAULT; 153 } 154 155 /* filep now owns the reference returned by kfd_create_process */ 156 filep->private_data = process; 157 158 dev_dbg(kfd_device, "process %d opened, compat mode (32 bit) - %d\n", 159 process->pasid, process->is_32bit_user_mode); 160 161 return 0; 162 } 163 164 static int kfd_release(struct inode *inode, struct file *filep) 165 { 166 struct kfd_process *process = filep->private_data; 167 168 if (process) 169 kfd_unref_process(process); 170 171 return 0; 172 } 173 174 static int kfd_ioctl_get_version(struct file *filep, struct kfd_process *p, 175 void *data) 176 { 177 struct kfd_ioctl_get_version_args *args = data; 178 179 args->major_version = KFD_IOCTL_MAJOR_VERSION; 180 args->minor_version = KFD_IOCTL_MINOR_VERSION; 181 182 return 0; 183 } 184 185 static int set_queue_properties_from_user(struct queue_properties *q_properties, 186 struct kfd_ioctl_create_queue_args *args) 187 { 188 /* 189 * Repurpose queue percentage to accommodate new features: 190 * bit 0-7: queue percentage 191 * bit 8-15: pm4_target_xcc 192 */ 193 if ((args->queue_percentage & 0xFF) > KFD_MAX_QUEUE_PERCENTAGE) { 194 pr_err("Queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n"); 195 return -EINVAL; 196 } 197 198 if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) { 199 pr_err("Queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n"); 200 return -EINVAL; 201 } 202 203 if ((args->ring_base_address) && 204 (!access_ok((const void __user *) args->ring_base_address, 205 sizeof(uint64_t)))) { 206 pr_err("Can't access ring base address\n"); 207 return -EFAULT; 208 } 209 210 if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) { 211 pr_err("Ring size must be a power of 2 or 0\n"); 212 return -EINVAL; 213 } 214 215 if (!access_ok((const void __user *) args->read_pointer_address, 216 sizeof(uint32_t))) { 217 pr_err("Can't access read pointer\n"); 218 return -EFAULT; 219 } 220 221 if (!access_ok((const void __user *) args->write_pointer_address, 222 sizeof(uint32_t))) { 223 pr_err("Can't access write pointer\n"); 224 return -EFAULT; 225 } 226 227 if (args->eop_buffer_address && 228 !access_ok((const void __user *) args->eop_buffer_address, 229 sizeof(uint32_t))) { 230 pr_debug("Can't access eop buffer"); 231 return -EFAULT; 232 } 233 234 if (args->ctx_save_restore_address && 235 !access_ok((const void __user *) args->ctx_save_restore_address, 236 sizeof(uint32_t))) { 237 pr_debug("Can't access ctx save restore buffer"); 238 return -EFAULT; 239 } 240 241 q_properties->is_interop = false; 242 q_properties->is_gws = false; 243 q_properties->queue_percent = args->queue_percentage & 0xFF; 244 /* bit 8-15 are repurposed to be PM4 target XCC */ 245 q_properties->pm4_target_xcc = (args->queue_percentage >> 8) & 0xFF; 246 q_properties->priority = args->queue_priority; 247 q_properties->queue_address = args->ring_base_address; 248 q_properties->queue_size = args->ring_size; 249 q_properties->read_ptr = (uint32_t *) args->read_pointer_address; 250 q_properties->write_ptr = (uint32_t *) args->write_pointer_address; 251 q_properties->eop_ring_buffer_address = args->eop_buffer_address; 252 q_properties->eop_ring_buffer_size = args->eop_buffer_size; 253 q_properties->ctx_save_restore_area_address = 254 args->ctx_save_restore_address; 255 q_properties->ctx_save_restore_area_size = args->ctx_save_restore_size; 256 q_properties->ctl_stack_size = args->ctl_stack_size; 257 if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE || 258 args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL) 259 q_properties->type = KFD_QUEUE_TYPE_COMPUTE; 260 else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA) 261 q_properties->type = KFD_QUEUE_TYPE_SDMA; 262 else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA_XGMI) 263 q_properties->type = KFD_QUEUE_TYPE_SDMA_XGMI; 264 else 265 return -ENOTSUPP; 266 267 if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL) 268 q_properties->format = KFD_QUEUE_FORMAT_AQL; 269 else 270 q_properties->format = KFD_QUEUE_FORMAT_PM4; 271 272 pr_debug("Queue Percentage: %d, %d\n", 273 q_properties->queue_percent, args->queue_percentage); 274 275 pr_debug("Queue Priority: %d, %d\n", 276 q_properties->priority, args->queue_priority); 277 278 pr_debug("Queue Address: 0x%llX, 0x%llX\n", 279 q_properties->queue_address, args->ring_base_address); 280 281 pr_debug("Queue Size: 0x%llX, %u\n", 282 q_properties->queue_size, args->ring_size); 283 284 pr_debug("Queue r/w Pointers: %px, %px\n", 285 q_properties->read_ptr, 286 q_properties->write_ptr); 287 288 pr_debug("Queue Format: %d\n", q_properties->format); 289 290 pr_debug("Queue EOP: 0x%llX\n", q_properties->eop_ring_buffer_address); 291 292 pr_debug("Queue CTX save area: 0x%llX\n", 293 q_properties->ctx_save_restore_area_address); 294 295 return 0; 296 } 297 298 static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p, 299 void *data) 300 { 301 struct kfd_ioctl_create_queue_args *args = data; 302 struct kfd_node *dev; 303 int err = 0; 304 unsigned int queue_id; 305 struct kfd_process_device *pdd; 306 struct queue_properties q_properties; 307 uint32_t doorbell_offset_in_process = 0; 308 struct amdgpu_bo *wptr_bo = NULL; 309 310 memset(&q_properties, 0, sizeof(struct queue_properties)); 311 312 pr_debug("Creating queue ioctl\n"); 313 314 err = set_queue_properties_from_user(&q_properties, args); 315 if (err) 316 return err; 317 318 pr_debug("Looking for gpu id 0x%x\n", args->gpu_id); 319 320 mutex_lock(&p->mutex); 321 322 pdd = kfd_process_device_data_by_id(p, args->gpu_id); 323 if (!pdd) { 324 pr_debug("Could not find gpu id 0x%x\n", args->gpu_id); 325 err = -EINVAL; 326 goto err_pdd; 327 } 328 dev = pdd->dev; 329 330 pdd = kfd_bind_process_to_device(dev, p); 331 if (IS_ERR(pdd)) { 332 err = -ESRCH; 333 goto err_bind_process; 334 } 335 336 if (!pdd->doorbell_index && 337 kfd_alloc_process_doorbells(dev->kfd, &pdd->doorbell_index) < 0) { 338 err = -ENOMEM; 339 goto err_alloc_doorbells; 340 } 341 342 /* Starting with GFX11, wptr BOs must be mapped to GART for MES to determine work 343 * on unmapped queues for usermode queue oversubscription (no aggregated doorbell) 344 */ 345 if (dev->kfd->shared_resources.enable_mes && 346 ((dev->adev->mes.sched_version & AMDGPU_MES_API_VERSION_MASK) 347 >> AMDGPU_MES_API_VERSION_SHIFT) >= 2) { 348 struct amdgpu_bo_va_mapping *wptr_mapping; 349 struct amdgpu_vm *wptr_vm; 350 351 wptr_vm = drm_priv_to_vm(pdd->drm_priv); 352 err = amdgpu_bo_reserve(wptr_vm->root.bo, false); 353 if (err) 354 goto err_wptr_map_gart; 355 356 wptr_mapping = amdgpu_vm_bo_lookup_mapping( 357 wptr_vm, args->write_pointer_address >> PAGE_SHIFT); 358 amdgpu_bo_unreserve(wptr_vm->root.bo); 359 if (!wptr_mapping) { 360 pr_err("Failed to lookup wptr bo\n"); 361 err = -EINVAL; 362 goto err_wptr_map_gart; 363 } 364 365 wptr_bo = wptr_mapping->bo_va->base.bo; 366 if (wptr_bo->tbo.base.size > PAGE_SIZE) { 367 pr_err("Requested GART mapping for wptr bo larger than one page\n"); 368 err = -EINVAL; 369 goto err_wptr_map_gart; 370 } 371 372 err = amdgpu_amdkfd_map_gtt_bo_to_gart(dev->adev, wptr_bo); 373 if (err) { 374 pr_err("Failed to map wptr bo to GART\n"); 375 goto err_wptr_map_gart; 376 } 377 } 378 379 pr_debug("Creating queue for PASID 0x%x on gpu 0x%x\n", 380 p->pasid, 381 dev->id); 382 383 err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, &queue_id, wptr_bo, 384 NULL, NULL, NULL, &doorbell_offset_in_process); 385 if (err != 0) 386 goto err_create_queue; 387 388 args->queue_id = queue_id; 389 390 391 /* Return gpu_id as doorbell offset for mmap usage */ 392 args->doorbell_offset = KFD_MMAP_TYPE_DOORBELL; 393 args->doorbell_offset |= KFD_MMAP_GPU_ID(args->gpu_id); 394 if (KFD_IS_SOC15(dev)) 395 /* On SOC15 ASICs, include the doorbell offset within the 396 * process doorbell frame, which is 2 pages. 397 */ 398 args->doorbell_offset |= doorbell_offset_in_process; 399 400 mutex_unlock(&p->mutex); 401 402 pr_debug("Queue id %d was created successfully\n", args->queue_id); 403 404 pr_debug("Ring buffer address == 0x%016llX\n", 405 args->ring_base_address); 406 407 pr_debug("Read ptr address == 0x%016llX\n", 408 args->read_pointer_address); 409 410 pr_debug("Write ptr address == 0x%016llX\n", 411 args->write_pointer_address); 412 413 kfd_dbg_ev_raise(KFD_EC_MASK(EC_QUEUE_NEW), p, dev, queue_id, false, NULL, 0); 414 return 0; 415 416 err_create_queue: 417 if (wptr_bo) 418 amdgpu_amdkfd_free_gtt_mem(dev->adev, wptr_bo); 419 err_wptr_map_gart: 420 err_alloc_doorbells: 421 err_bind_process: 422 err_pdd: 423 mutex_unlock(&p->mutex); 424 return err; 425 } 426 427 static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p, 428 void *data) 429 { 430 int retval; 431 struct kfd_ioctl_destroy_queue_args *args = data; 432 433 pr_debug("Destroying queue id %d for pasid 0x%x\n", 434 args->queue_id, 435 p->pasid); 436 437 mutex_lock(&p->mutex); 438 439 retval = pqm_destroy_queue(&p->pqm, args->queue_id); 440 441 mutex_unlock(&p->mutex); 442 return retval; 443 } 444 445 static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p, 446 void *data) 447 { 448 int retval; 449 struct kfd_ioctl_update_queue_args *args = data; 450 struct queue_properties properties; 451 452 /* 453 * Repurpose queue percentage to accommodate new features: 454 * bit 0-7: queue percentage 455 * bit 8-15: pm4_target_xcc 456 */ 457 if ((args->queue_percentage & 0xFF) > KFD_MAX_QUEUE_PERCENTAGE) { 458 pr_err("Queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n"); 459 return -EINVAL; 460 } 461 462 if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) { 463 pr_err("Queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n"); 464 return -EINVAL; 465 } 466 467 if ((args->ring_base_address) && 468 (!access_ok((const void __user *) args->ring_base_address, 469 sizeof(uint64_t)))) { 470 pr_err("Can't access ring base address\n"); 471 return -EFAULT; 472 } 473 474 if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) { 475 pr_err("Ring size must be a power of 2 or 0\n"); 476 return -EINVAL; 477 } 478 479 properties.queue_address = args->ring_base_address; 480 properties.queue_size = args->ring_size; 481 properties.queue_percent = args->queue_percentage & 0xFF; 482 /* bit 8-15 are repurposed to be PM4 target XCC */ 483 properties.pm4_target_xcc = (args->queue_percentage >> 8) & 0xFF; 484 properties.priority = args->queue_priority; 485 486 pr_debug("Updating queue id %d for pasid 0x%x\n", 487 args->queue_id, p->pasid); 488 489 mutex_lock(&p->mutex); 490 491 retval = pqm_update_queue_properties(&p->pqm, args->queue_id, &properties); 492 493 mutex_unlock(&p->mutex); 494 495 return retval; 496 } 497 498 static int kfd_ioctl_set_cu_mask(struct file *filp, struct kfd_process *p, 499 void *data) 500 { 501 int retval; 502 const int max_num_cus = 1024; 503 struct kfd_ioctl_set_cu_mask_args *args = data; 504 struct mqd_update_info minfo = {0}; 505 uint32_t __user *cu_mask_ptr = (uint32_t __user *)args->cu_mask_ptr; 506 size_t cu_mask_size = sizeof(uint32_t) * (args->num_cu_mask / 32); 507 508 if ((args->num_cu_mask % 32) != 0) { 509 pr_debug("num_cu_mask 0x%x must be a multiple of 32", 510 args->num_cu_mask); 511 return -EINVAL; 512 } 513 514 minfo.cu_mask.count = args->num_cu_mask; 515 if (minfo.cu_mask.count == 0) { 516 pr_debug("CU mask cannot be 0"); 517 return -EINVAL; 518 } 519 520 /* To prevent an unreasonably large CU mask size, set an arbitrary 521 * limit of max_num_cus bits. We can then just drop any CU mask bits 522 * past max_num_cus bits and just use the first max_num_cus bits. 523 */ 524 if (minfo.cu_mask.count > max_num_cus) { 525 pr_debug("CU mask cannot be greater than 1024 bits"); 526 minfo.cu_mask.count = max_num_cus; 527 cu_mask_size = sizeof(uint32_t) * (max_num_cus/32); 528 } 529 530 minfo.cu_mask.ptr = kzalloc(cu_mask_size, GFP_KERNEL); 531 if (!minfo.cu_mask.ptr) 532 return -ENOMEM; 533 534 retval = copy_from_user(minfo.cu_mask.ptr, cu_mask_ptr, cu_mask_size); 535 if (retval) { 536 pr_debug("Could not copy CU mask from userspace"); 537 retval = -EFAULT; 538 goto out; 539 } 540 541 mutex_lock(&p->mutex); 542 543 retval = pqm_update_mqd(&p->pqm, args->queue_id, &minfo); 544 545 mutex_unlock(&p->mutex); 546 547 out: 548 kfree(minfo.cu_mask.ptr); 549 return retval; 550 } 551 552 static int kfd_ioctl_get_queue_wave_state(struct file *filep, 553 struct kfd_process *p, void *data) 554 { 555 struct kfd_ioctl_get_queue_wave_state_args *args = data; 556 int r; 557 558 mutex_lock(&p->mutex); 559 560 r = pqm_get_wave_state(&p->pqm, args->queue_id, 561 (void __user *)args->ctl_stack_address, 562 &args->ctl_stack_used_size, 563 &args->save_area_used_size); 564 565 mutex_unlock(&p->mutex); 566 567 return r; 568 } 569 570 static int kfd_ioctl_set_memory_policy(struct file *filep, 571 struct kfd_process *p, void *data) 572 { 573 struct kfd_ioctl_set_memory_policy_args *args = data; 574 int err = 0; 575 struct kfd_process_device *pdd; 576 enum cache_policy default_policy, alternate_policy; 577 578 if (args->default_policy != KFD_IOC_CACHE_POLICY_COHERENT 579 && args->default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) { 580 return -EINVAL; 581 } 582 583 if (args->alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT 584 && args->alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) { 585 return -EINVAL; 586 } 587 588 mutex_lock(&p->mutex); 589 pdd = kfd_process_device_data_by_id(p, args->gpu_id); 590 if (!pdd) { 591 pr_debug("Could not find gpu id 0x%x\n", args->gpu_id); 592 err = -EINVAL; 593 goto err_pdd; 594 } 595 596 pdd = kfd_bind_process_to_device(pdd->dev, p); 597 if (IS_ERR(pdd)) { 598 err = -ESRCH; 599 goto out; 600 } 601 602 default_policy = (args->default_policy == KFD_IOC_CACHE_POLICY_COHERENT) 603 ? cache_policy_coherent : cache_policy_noncoherent; 604 605 alternate_policy = 606 (args->alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT) 607 ? cache_policy_coherent : cache_policy_noncoherent; 608 609 if (!pdd->dev->dqm->ops.set_cache_memory_policy(pdd->dev->dqm, 610 &pdd->qpd, 611 default_policy, 612 alternate_policy, 613 (void __user *)args->alternate_aperture_base, 614 args->alternate_aperture_size)) 615 err = -EINVAL; 616 617 out: 618 err_pdd: 619 mutex_unlock(&p->mutex); 620 621 return err; 622 } 623 624 static int kfd_ioctl_set_trap_handler(struct file *filep, 625 struct kfd_process *p, void *data) 626 { 627 struct kfd_ioctl_set_trap_handler_args *args = data; 628 int err = 0; 629 struct kfd_process_device *pdd; 630 631 mutex_lock(&p->mutex); 632 633 pdd = kfd_process_device_data_by_id(p, args->gpu_id); 634 if (!pdd) { 635 err = -EINVAL; 636 goto err_pdd; 637 } 638 639 pdd = kfd_bind_process_to_device(pdd->dev, p); 640 if (IS_ERR(pdd)) { 641 err = -ESRCH; 642 goto out; 643 } 644 645 kfd_process_set_trap_handler(&pdd->qpd, args->tba_addr, args->tma_addr); 646 647 out: 648 err_pdd: 649 mutex_unlock(&p->mutex); 650 651 return err; 652 } 653 654 static int kfd_ioctl_dbg_register(struct file *filep, 655 struct kfd_process *p, void *data) 656 { 657 return -EPERM; 658 } 659 660 static int kfd_ioctl_dbg_unregister(struct file *filep, 661 struct kfd_process *p, void *data) 662 { 663 return -EPERM; 664 } 665 666 static int kfd_ioctl_dbg_address_watch(struct file *filep, 667 struct kfd_process *p, void *data) 668 { 669 return -EPERM; 670 } 671 672 /* Parse and generate fixed size data structure for wave control */ 673 static int kfd_ioctl_dbg_wave_control(struct file *filep, 674 struct kfd_process *p, void *data) 675 { 676 return -EPERM; 677 } 678 679 static int kfd_ioctl_get_clock_counters(struct file *filep, 680 struct kfd_process *p, void *data) 681 { 682 struct kfd_ioctl_get_clock_counters_args *args = data; 683 struct kfd_process_device *pdd; 684 685 mutex_lock(&p->mutex); 686 pdd = kfd_process_device_data_by_id(p, args->gpu_id); 687 mutex_unlock(&p->mutex); 688 if (pdd) 689 /* Reading GPU clock counter from KGD */ 690 args->gpu_clock_counter = amdgpu_amdkfd_get_gpu_clock_counter(pdd->dev->adev); 691 else 692 /* Node without GPU resource */ 693 args->gpu_clock_counter = 0; 694 695 /* No access to rdtsc. Using raw monotonic time */ 696 args->cpu_clock_counter = ktime_get_raw_ns(); 697 args->system_clock_counter = ktime_get_boottime_ns(); 698 699 /* Since the counter is in nano-seconds we use 1GHz frequency */ 700 args->system_clock_freq = 1000000000; 701 702 return 0; 703 } 704 705 706 static int kfd_ioctl_get_process_apertures(struct file *filp, 707 struct kfd_process *p, void *data) 708 { 709 struct kfd_ioctl_get_process_apertures_args *args = data; 710 struct kfd_process_device_apertures *pAperture; 711 int i; 712 713 dev_dbg(kfd_device, "get apertures for PASID 0x%x", p->pasid); 714 715 args->num_of_nodes = 0; 716 717 mutex_lock(&p->mutex); 718 /* Run over all pdd of the process */ 719 for (i = 0; i < p->n_pdds; i++) { 720 struct kfd_process_device *pdd = p->pdds[i]; 721 722 pAperture = 723 &args->process_apertures[args->num_of_nodes]; 724 pAperture->gpu_id = pdd->dev->id; 725 pAperture->lds_base = pdd->lds_base; 726 pAperture->lds_limit = pdd->lds_limit; 727 pAperture->gpuvm_base = pdd->gpuvm_base; 728 pAperture->gpuvm_limit = pdd->gpuvm_limit; 729 pAperture->scratch_base = pdd->scratch_base; 730 pAperture->scratch_limit = pdd->scratch_limit; 731 732 dev_dbg(kfd_device, 733 "node id %u\n", args->num_of_nodes); 734 dev_dbg(kfd_device, 735 "gpu id %u\n", pdd->dev->id); 736 dev_dbg(kfd_device, 737 "lds_base %llX\n", pdd->lds_base); 738 dev_dbg(kfd_device, 739 "lds_limit %llX\n", pdd->lds_limit); 740 dev_dbg(kfd_device, 741 "gpuvm_base %llX\n", pdd->gpuvm_base); 742 dev_dbg(kfd_device, 743 "gpuvm_limit %llX\n", pdd->gpuvm_limit); 744 dev_dbg(kfd_device, 745 "scratch_base %llX\n", pdd->scratch_base); 746 dev_dbg(kfd_device, 747 "scratch_limit %llX\n", pdd->scratch_limit); 748 749 if (++args->num_of_nodes >= NUM_OF_SUPPORTED_GPUS) 750 break; 751 } 752 mutex_unlock(&p->mutex); 753 754 return 0; 755 } 756 757 static int kfd_ioctl_get_process_apertures_new(struct file *filp, 758 struct kfd_process *p, void *data) 759 { 760 struct kfd_ioctl_get_process_apertures_new_args *args = data; 761 struct kfd_process_device_apertures *pa; 762 int ret; 763 int i; 764 765 dev_dbg(kfd_device, "get apertures for PASID 0x%x", p->pasid); 766 767 if (args->num_of_nodes == 0) { 768 /* Return number of nodes, so that user space can alloacate 769 * sufficient memory 770 */ 771 mutex_lock(&p->mutex); 772 args->num_of_nodes = p->n_pdds; 773 goto out_unlock; 774 } 775 776 /* Fill in process-aperture information for all available 777 * nodes, but not more than args->num_of_nodes as that is 778 * the amount of memory allocated by user 779 */ 780 pa = kzalloc((sizeof(struct kfd_process_device_apertures) * 781 args->num_of_nodes), GFP_KERNEL); 782 if (!pa) 783 return -ENOMEM; 784 785 mutex_lock(&p->mutex); 786 787 if (!p->n_pdds) { 788 args->num_of_nodes = 0; 789 kfree(pa); 790 goto out_unlock; 791 } 792 793 /* Run over all pdd of the process */ 794 for (i = 0; i < min(p->n_pdds, args->num_of_nodes); i++) { 795 struct kfd_process_device *pdd = p->pdds[i]; 796 797 pa[i].gpu_id = pdd->dev->id; 798 pa[i].lds_base = pdd->lds_base; 799 pa[i].lds_limit = pdd->lds_limit; 800 pa[i].gpuvm_base = pdd->gpuvm_base; 801 pa[i].gpuvm_limit = pdd->gpuvm_limit; 802 pa[i].scratch_base = pdd->scratch_base; 803 pa[i].scratch_limit = pdd->scratch_limit; 804 805 dev_dbg(kfd_device, 806 "gpu id %u\n", pdd->dev->id); 807 dev_dbg(kfd_device, 808 "lds_base %llX\n", pdd->lds_base); 809 dev_dbg(kfd_device, 810 "lds_limit %llX\n", pdd->lds_limit); 811 dev_dbg(kfd_device, 812 "gpuvm_base %llX\n", pdd->gpuvm_base); 813 dev_dbg(kfd_device, 814 "gpuvm_limit %llX\n", pdd->gpuvm_limit); 815 dev_dbg(kfd_device, 816 "scratch_base %llX\n", pdd->scratch_base); 817 dev_dbg(kfd_device, 818 "scratch_limit %llX\n", pdd->scratch_limit); 819 } 820 mutex_unlock(&p->mutex); 821 822 args->num_of_nodes = i; 823 ret = copy_to_user( 824 (void __user *)args->kfd_process_device_apertures_ptr, 825 pa, 826 (i * sizeof(struct kfd_process_device_apertures))); 827 kfree(pa); 828 return ret ? -EFAULT : 0; 829 830 out_unlock: 831 mutex_unlock(&p->mutex); 832 return 0; 833 } 834 835 static int kfd_ioctl_create_event(struct file *filp, struct kfd_process *p, 836 void *data) 837 { 838 struct kfd_ioctl_create_event_args *args = data; 839 int err; 840 841 /* For dGPUs the event page is allocated in user mode. The 842 * handle is passed to KFD with the first call to this IOCTL 843 * through the event_page_offset field. 844 */ 845 if (args->event_page_offset) { 846 mutex_lock(&p->mutex); 847 err = kfd_kmap_event_page(p, args->event_page_offset); 848 mutex_unlock(&p->mutex); 849 if (err) 850 return err; 851 } 852 853 err = kfd_event_create(filp, p, args->event_type, 854 args->auto_reset != 0, args->node_id, 855 &args->event_id, &args->event_trigger_data, 856 &args->event_page_offset, 857 &args->event_slot_index); 858 859 pr_debug("Created event (id:0x%08x) (%s)\n", args->event_id, __func__); 860 return err; 861 } 862 863 static int kfd_ioctl_destroy_event(struct file *filp, struct kfd_process *p, 864 void *data) 865 { 866 struct kfd_ioctl_destroy_event_args *args = data; 867 868 return kfd_event_destroy(p, args->event_id); 869 } 870 871 static int kfd_ioctl_set_event(struct file *filp, struct kfd_process *p, 872 void *data) 873 { 874 struct kfd_ioctl_set_event_args *args = data; 875 876 return kfd_set_event(p, args->event_id); 877 } 878 879 static int kfd_ioctl_reset_event(struct file *filp, struct kfd_process *p, 880 void *data) 881 { 882 struct kfd_ioctl_reset_event_args *args = data; 883 884 return kfd_reset_event(p, args->event_id); 885 } 886 887 static int kfd_ioctl_wait_events(struct file *filp, struct kfd_process *p, 888 void *data) 889 { 890 struct kfd_ioctl_wait_events_args *args = data; 891 892 return kfd_wait_on_events(p, args->num_events, 893 (void __user *)args->events_ptr, 894 (args->wait_for_all != 0), 895 &args->timeout, &args->wait_result); 896 } 897 static int kfd_ioctl_set_scratch_backing_va(struct file *filep, 898 struct kfd_process *p, void *data) 899 { 900 struct kfd_ioctl_set_scratch_backing_va_args *args = data; 901 struct kfd_process_device *pdd; 902 struct kfd_node *dev; 903 long err; 904 905 mutex_lock(&p->mutex); 906 pdd = kfd_process_device_data_by_id(p, args->gpu_id); 907 if (!pdd) { 908 err = -EINVAL; 909 goto err_pdd; 910 } 911 dev = pdd->dev; 912 913 pdd = kfd_bind_process_to_device(dev, p); 914 if (IS_ERR(pdd)) { 915 err = PTR_ERR(pdd); 916 goto bind_process_to_device_fail; 917 } 918 919 pdd->qpd.sh_hidden_private_base = args->va_addr; 920 921 mutex_unlock(&p->mutex); 922 923 if (dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS && 924 pdd->qpd.vmid != 0 && dev->kfd2kgd->set_scratch_backing_va) 925 dev->kfd2kgd->set_scratch_backing_va( 926 dev->adev, args->va_addr, pdd->qpd.vmid); 927 928 return 0; 929 930 bind_process_to_device_fail: 931 err_pdd: 932 mutex_unlock(&p->mutex); 933 return err; 934 } 935 936 static int kfd_ioctl_get_tile_config(struct file *filep, 937 struct kfd_process *p, void *data) 938 { 939 struct kfd_ioctl_get_tile_config_args *args = data; 940 struct kfd_process_device *pdd; 941 struct tile_config config; 942 int err = 0; 943 944 mutex_lock(&p->mutex); 945 pdd = kfd_process_device_data_by_id(p, args->gpu_id); 946 mutex_unlock(&p->mutex); 947 if (!pdd) 948 return -EINVAL; 949 950 amdgpu_amdkfd_get_tile_config(pdd->dev->adev, &config); 951 952 args->gb_addr_config = config.gb_addr_config; 953 args->num_banks = config.num_banks; 954 args->num_ranks = config.num_ranks; 955 956 if (args->num_tile_configs > config.num_tile_configs) 957 args->num_tile_configs = config.num_tile_configs; 958 err = copy_to_user((void __user *)args->tile_config_ptr, 959 config.tile_config_ptr, 960 args->num_tile_configs * sizeof(uint32_t)); 961 if (err) { 962 args->num_tile_configs = 0; 963 return -EFAULT; 964 } 965 966 if (args->num_macro_tile_configs > config.num_macro_tile_configs) 967 args->num_macro_tile_configs = 968 config.num_macro_tile_configs; 969 err = copy_to_user((void __user *)args->macro_tile_config_ptr, 970 config.macro_tile_config_ptr, 971 args->num_macro_tile_configs * sizeof(uint32_t)); 972 if (err) { 973 args->num_macro_tile_configs = 0; 974 return -EFAULT; 975 } 976 977 return 0; 978 } 979 980 static int kfd_ioctl_acquire_vm(struct file *filep, struct kfd_process *p, 981 void *data) 982 { 983 struct kfd_ioctl_acquire_vm_args *args = data; 984 struct kfd_process_device *pdd; 985 struct file *drm_file; 986 int ret; 987 988 drm_file = fget(args->drm_fd); 989 if (!drm_file) 990 return -EINVAL; 991 992 mutex_lock(&p->mutex); 993 pdd = kfd_process_device_data_by_id(p, args->gpu_id); 994 if (!pdd) { 995 ret = -EINVAL; 996 goto err_pdd; 997 } 998 999 if (pdd->drm_file) { 1000 ret = pdd->drm_file == drm_file ? 0 : -EBUSY; 1001 goto err_drm_file; 1002 } 1003 1004 ret = kfd_process_device_init_vm(pdd, drm_file); 1005 if (ret) 1006 goto err_unlock; 1007 1008 /* On success, the PDD keeps the drm_file reference */ 1009 mutex_unlock(&p->mutex); 1010 1011 return 0; 1012 1013 err_unlock: 1014 err_pdd: 1015 err_drm_file: 1016 mutex_unlock(&p->mutex); 1017 fput(drm_file); 1018 return ret; 1019 } 1020 1021 bool kfd_dev_is_large_bar(struct kfd_node *dev) 1022 { 1023 if (debug_largebar) { 1024 pr_debug("Simulate large-bar allocation on non large-bar machine\n"); 1025 return true; 1026 } 1027 1028 if (dev->kfd->use_iommu_v2) 1029 return false; 1030 1031 if (dev->local_mem_info.local_mem_size_private == 0 && 1032 dev->local_mem_info.local_mem_size_public > 0) 1033 return true; 1034 1035 if (dev->local_mem_info.local_mem_size_public == 0 && 1036 dev->kfd->adev->gmc.is_app_apu) { 1037 pr_debug("APP APU, Consider like a large bar system\n"); 1038 return true; 1039 } 1040 1041 return false; 1042 } 1043 1044 static int kfd_ioctl_get_available_memory(struct file *filep, 1045 struct kfd_process *p, void *data) 1046 { 1047 struct kfd_ioctl_get_available_memory_args *args = data; 1048 struct kfd_process_device *pdd = kfd_lock_pdd_by_id(p, args->gpu_id); 1049 1050 if (!pdd) 1051 return -EINVAL; 1052 args->available = amdgpu_amdkfd_get_available_memory(pdd->dev->adev, 1053 pdd->dev->node_id); 1054 kfd_unlock_pdd(pdd); 1055 return 0; 1056 } 1057 1058 static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep, 1059 struct kfd_process *p, void *data) 1060 { 1061 struct kfd_ioctl_alloc_memory_of_gpu_args *args = data; 1062 struct kfd_process_device *pdd; 1063 void *mem; 1064 struct kfd_node *dev; 1065 int idr_handle; 1066 long err; 1067 uint64_t offset = args->mmap_offset; 1068 uint32_t flags = args->flags; 1069 1070 if (args->size == 0) 1071 return -EINVAL; 1072 1073 #if IS_ENABLED(CONFIG_HSA_AMD_SVM) 1074 /* Flush pending deferred work to avoid racing with deferred actions 1075 * from previous memory map changes (e.g. munmap). 1076 */ 1077 svm_range_list_lock_and_flush_work(&p->svms, current->mm); 1078 mutex_lock(&p->svms.lock); 1079 mmap_write_unlock(current->mm); 1080 if (interval_tree_iter_first(&p->svms.objects, 1081 args->va_addr >> PAGE_SHIFT, 1082 (args->va_addr + args->size - 1) >> PAGE_SHIFT)) { 1083 pr_err("Address: 0x%llx already allocated by SVM\n", 1084 args->va_addr); 1085 mutex_unlock(&p->svms.lock); 1086 return -EADDRINUSE; 1087 } 1088 1089 /* When register user buffer check if it has been registered by svm by 1090 * buffer cpu virtual address. 1091 */ 1092 if ((flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) && 1093 interval_tree_iter_first(&p->svms.objects, 1094 args->mmap_offset >> PAGE_SHIFT, 1095 (args->mmap_offset + args->size - 1) >> PAGE_SHIFT)) { 1096 pr_err("User Buffer Address: 0x%llx already allocated by SVM\n", 1097 args->mmap_offset); 1098 mutex_unlock(&p->svms.lock); 1099 return -EADDRINUSE; 1100 } 1101 1102 mutex_unlock(&p->svms.lock); 1103 #endif 1104 mutex_lock(&p->mutex); 1105 pdd = kfd_process_device_data_by_id(p, args->gpu_id); 1106 if (!pdd) { 1107 err = -EINVAL; 1108 goto err_pdd; 1109 } 1110 1111 dev = pdd->dev; 1112 1113 if ((flags & KFD_IOC_ALLOC_MEM_FLAGS_PUBLIC) && 1114 (flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) && 1115 !kfd_dev_is_large_bar(dev)) { 1116 pr_err("Alloc host visible vram on small bar is not allowed\n"); 1117 err = -EINVAL; 1118 goto err_large_bar; 1119 } 1120 1121 pdd = kfd_bind_process_to_device(dev, p); 1122 if (IS_ERR(pdd)) { 1123 err = PTR_ERR(pdd); 1124 goto err_unlock; 1125 } 1126 1127 if (flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) { 1128 if (args->size != kfd_doorbell_process_slice(dev->kfd)) { 1129 err = -EINVAL; 1130 goto err_unlock; 1131 } 1132 offset = kfd_get_process_doorbells(pdd); 1133 if (!offset) { 1134 err = -ENOMEM; 1135 goto err_unlock; 1136 } 1137 } else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) { 1138 if (args->size != PAGE_SIZE) { 1139 err = -EINVAL; 1140 goto err_unlock; 1141 } 1142 offset = dev->adev->rmmio_remap.bus_addr; 1143 if (!offset) { 1144 err = -ENOMEM; 1145 goto err_unlock; 1146 } 1147 } 1148 1149 err = amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu( 1150 dev->adev, args->va_addr, args->size, 1151 pdd->drm_priv, (struct kgd_mem **) &mem, &offset, 1152 flags, false); 1153 1154 if (err) 1155 goto err_unlock; 1156 1157 idr_handle = kfd_process_device_create_obj_handle(pdd, mem); 1158 if (idr_handle < 0) { 1159 err = -EFAULT; 1160 goto err_free; 1161 } 1162 1163 /* Update the VRAM usage count */ 1164 if (flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) { 1165 uint64_t size = args->size; 1166 1167 if (flags & KFD_IOC_ALLOC_MEM_FLAGS_AQL_QUEUE_MEM) 1168 size >>= 1; 1169 WRITE_ONCE(pdd->vram_usage, pdd->vram_usage + PAGE_ALIGN(size)); 1170 } 1171 1172 mutex_unlock(&p->mutex); 1173 1174 args->handle = MAKE_HANDLE(args->gpu_id, idr_handle); 1175 args->mmap_offset = offset; 1176 1177 /* MMIO is mapped through kfd device 1178 * Generate a kfd mmap offset 1179 */ 1180 if (flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) 1181 args->mmap_offset = KFD_MMAP_TYPE_MMIO 1182 | KFD_MMAP_GPU_ID(args->gpu_id); 1183 1184 return 0; 1185 1186 err_free: 1187 amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->adev, (struct kgd_mem *)mem, 1188 pdd->drm_priv, NULL); 1189 err_unlock: 1190 err_pdd: 1191 err_large_bar: 1192 mutex_unlock(&p->mutex); 1193 return err; 1194 } 1195 1196 static int kfd_ioctl_free_memory_of_gpu(struct file *filep, 1197 struct kfd_process *p, void *data) 1198 { 1199 struct kfd_ioctl_free_memory_of_gpu_args *args = data; 1200 struct kfd_process_device *pdd; 1201 void *mem; 1202 int ret; 1203 uint64_t size = 0; 1204 1205 mutex_lock(&p->mutex); 1206 /* 1207 * Safeguard to prevent user space from freeing signal BO. 1208 * It will be freed at process termination. 1209 */ 1210 if (p->signal_handle && (p->signal_handle == args->handle)) { 1211 pr_err("Free signal BO is not allowed\n"); 1212 ret = -EPERM; 1213 goto err_unlock; 1214 } 1215 1216 pdd = kfd_process_device_data_by_id(p, GET_GPU_ID(args->handle)); 1217 if (!pdd) { 1218 pr_err("Process device data doesn't exist\n"); 1219 ret = -EINVAL; 1220 goto err_pdd; 1221 } 1222 1223 mem = kfd_process_device_translate_handle( 1224 pdd, GET_IDR_HANDLE(args->handle)); 1225 if (!mem) { 1226 ret = -EINVAL; 1227 goto err_unlock; 1228 } 1229 1230 ret = amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->adev, 1231 (struct kgd_mem *)mem, pdd->drm_priv, &size); 1232 1233 /* If freeing the buffer failed, leave the handle in place for 1234 * clean-up during process tear-down. 1235 */ 1236 if (!ret) 1237 kfd_process_device_remove_obj_handle( 1238 pdd, GET_IDR_HANDLE(args->handle)); 1239 1240 WRITE_ONCE(pdd->vram_usage, pdd->vram_usage - size); 1241 1242 err_unlock: 1243 err_pdd: 1244 mutex_unlock(&p->mutex); 1245 return ret; 1246 } 1247 1248 static int kfd_ioctl_map_memory_to_gpu(struct file *filep, 1249 struct kfd_process *p, void *data) 1250 { 1251 struct kfd_ioctl_map_memory_to_gpu_args *args = data; 1252 struct kfd_process_device *pdd, *peer_pdd; 1253 void *mem; 1254 struct kfd_node *dev; 1255 long err = 0; 1256 int i; 1257 uint32_t *devices_arr = NULL; 1258 1259 if (!args->n_devices) { 1260 pr_debug("Device IDs array empty\n"); 1261 return -EINVAL; 1262 } 1263 if (args->n_success > args->n_devices) { 1264 pr_debug("n_success exceeds n_devices\n"); 1265 return -EINVAL; 1266 } 1267 1268 devices_arr = kmalloc_array(args->n_devices, sizeof(*devices_arr), 1269 GFP_KERNEL); 1270 if (!devices_arr) 1271 return -ENOMEM; 1272 1273 err = copy_from_user(devices_arr, 1274 (void __user *)args->device_ids_array_ptr, 1275 args->n_devices * sizeof(*devices_arr)); 1276 if (err != 0) { 1277 err = -EFAULT; 1278 goto copy_from_user_failed; 1279 } 1280 1281 mutex_lock(&p->mutex); 1282 pdd = kfd_process_device_data_by_id(p, GET_GPU_ID(args->handle)); 1283 if (!pdd) { 1284 err = -EINVAL; 1285 goto get_process_device_data_failed; 1286 } 1287 dev = pdd->dev; 1288 1289 pdd = kfd_bind_process_to_device(dev, p); 1290 if (IS_ERR(pdd)) { 1291 err = PTR_ERR(pdd); 1292 goto bind_process_to_device_failed; 1293 } 1294 1295 mem = kfd_process_device_translate_handle(pdd, 1296 GET_IDR_HANDLE(args->handle)); 1297 if (!mem) { 1298 err = -ENOMEM; 1299 goto get_mem_obj_from_handle_failed; 1300 } 1301 1302 for (i = args->n_success; i < args->n_devices; i++) { 1303 peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]); 1304 if (!peer_pdd) { 1305 pr_debug("Getting device by id failed for 0x%x\n", 1306 devices_arr[i]); 1307 err = -EINVAL; 1308 goto get_mem_obj_from_handle_failed; 1309 } 1310 1311 peer_pdd = kfd_bind_process_to_device(peer_pdd->dev, p); 1312 if (IS_ERR(peer_pdd)) { 1313 err = PTR_ERR(peer_pdd); 1314 goto get_mem_obj_from_handle_failed; 1315 } 1316 1317 err = amdgpu_amdkfd_gpuvm_map_memory_to_gpu( 1318 peer_pdd->dev->adev, (struct kgd_mem *)mem, 1319 peer_pdd->drm_priv); 1320 if (err) { 1321 struct pci_dev *pdev = peer_pdd->dev->adev->pdev; 1322 1323 dev_err(dev->adev->dev, 1324 "Failed to map peer:%04x:%02x:%02x.%d mem_domain:%d\n", 1325 pci_domain_nr(pdev->bus), 1326 pdev->bus->number, 1327 PCI_SLOT(pdev->devfn), 1328 PCI_FUNC(pdev->devfn), 1329 ((struct kgd_mem *)mem)->domain); 1330 goto map_memory_to_gpu_failed; 1331 } 1332 args->n_success = i+1; 1333 } 1334 1335 err = amdgpu_amdkfd_gpuvm_sync_memory(dev->adev, (struct kgd_mem *) mem, true); 1336 if (err) { 1337 pr_debug("Sync memory failed, wait interrupted by user signal\n"); 1338 goto sync_memory_failed; 1339 } 1340 1341 mutex_unlock(&p->mutex); 1342 1343 /* Flush TLBs after waiting for the page table updates to complete */ 1344 for (i = 0; i < args->n_devices; i++) { 1345 peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]); 1346 if (WARN_ON_ONCE(!peer_pdd)) 1347 continue; 1348 kfd_flush_tlb(peer_pdd, TLB_FLUSH_LEGACY); 1349 } 1350 kfree(devices_arr); 1351 1352 return err; 1353 1354 get_process_device_data_failed: 1355 bind_process_to_device_failed: 1356 get_mem_obj_from_handle_failed: 1357 map_memory_to_gpu_failed: 1358 sync_memory_failed: 1359 mutex_unlock(&p->mutex); 1360 copy_from_user_failed: 1361 kfree(devices_arr); 1362 1363 return err; 1364 } 1365 1366 static int kfd_ioctl_unmap_memory_from_gpu(struct file *filep, 1367 struct kfd_process *p, void *data) 1368 { 1369 struct kfd_ioctl_unmap_memory_from_gpu_args *args = data; 1370 struct kfd_process_device *pdd, *peer_pdd; 1371 void *mem; 1372 long err = 0; 1373 uint32_t *devices_arr = NULL, i; 1374 bool flush_tlb; 1375 1376 if (!args->n_devices) { 1377 pr_debug("Device IDs array empty\n"); 1378 return -EINVAL; 1379 } 1380 if (args->n_success > args->n_devices) { 1381 pr_debug("n_success exceeds n_devices\n"); 1382 return -EINVAL; 1383 } 1384 1385 devices_arr = kmalloc_array(args->n_devices, sizeof(*devices_arr), 1386 GFP_KERNEL); 1387 if (!devices_arr) 1388 return -ENOMEM; 1389 1390 err = copy_from_user(devices_arr, 1391 (void __user *)args->device_ids_array_ptr, 1392 args->n_devices * sizeof(*devices_arr)); 1393 if (err != 0) { 1394 err = -EFAULT; 1395 goto copy_from_user_failed; 1396 } 1397 1398 mutex_lock(&p->mutex); 1399 pdd = kfd_process_device_data_by_id(p, GET_GPU_ID(args->handle)); 1400 if (!pdd) { 1401 err = -EINVAL; 1402 goto bind_process_to_device_failed; 1403 } 1404 1405 mem = kfd_process_device_translate_handle(pdd, 1406 GET_IDR_HANDLE(args->handle)); 1407 if (!mem) { 1408 err = -ENOMEM; 1409 goto get_mem_obj_from_handle_failed; 1410 } 1411 1412 for (i = args->n_success; i < args->n_devices; i++) { 1413 peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]); 1414 if (!peer_pdd) { 1415 err = -EINVAL; 1416 goto get_mem_obj_from_handle_failed; 1417 } 1418 err = amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu( 1419 peer_pdd->dev->adev, (struct kgd_mem *)mem, peer_pdd->drm_priv); 1420 if (err) { 1421 pr_err("Failed to unmap from gpu %d/%d\n", 1422 i, args->n_devices); 1423 goto unmap_memory_from_gpu_failed; 1424 } 1425 args->n_success = i+1; 1426 } 1427 1428 flush_tlb = kfd_flush_tlb_after_unmap(pdd->dev->kfd); 1429 if (flush_tlb) { 1430 err = amdgpu_amdkfd_gpuvm_sync_memory(pdd->dev->adev, 1431 (struct kgd_mem *) mem, true); 1432 if (err) { 1433 pr_debug("Sync memory failed, wait interrupted by user signal\n"); 1434 goto sync_memory_failed; 1435 } 1436 } 1437 mutex_unlock(&p->mutex); 1438 1439 if (flush_tlb) { 1440 /* Flush TLBs after waiting for the page table updates to complete */ 1441 for (i = 0; i < args->n_devices; i++) { 1442 peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]); 1443 if (WARN_ON_ONCE(!peer_pdd)) 1444 continue; 1445 kfd_flush_tlb(peer_pdd, TLB_FLUSH_HEAVYWEIGHT); 1446 } 1447 } 1448 kfree(devices_arr); 1449 1450 return 0; 1451 1452 bind_process_to_device_failed: 1453 get_mem_obj_from_handle_failed: 1454 unmap_memory_from_gpu_failed: 1455 sync_memory_failed: 1456 mutex_unlock(&p->mutex); 1457 copy_from_user_failed: 1458 kfree(devices_arr); 1459 return err; 1460 } 1461 1462 static int kfd_ioctl_alloc_queue_gws(struct file *filep, 1463 struct kfd_process *p, void *data) 1464 { 1465 int retval; 1466 struct kfd_ioctl_alloc_queue_gws_args *args = data; 1467 struct queue *q; 1468 struct kfd_node *dev; 1469 1470 mutex_lock(&p->mutex); 1471 q = pqm_get_user_queue(&p->pqm, args->queue_id); 1472 1473 if (q) { 1474 dev = q->device; 1475 } else { 1476 retval = -EINVAL; 1477 goto out_unlock; 1478 } 1479 1480 if (!dev->gws) { 1481 retval = -ENODEV; 1482 goto out_unlock; 1483 } 1484 1485 if (dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) { 1486 retval = -ENODEV; 1487 goto out_unlock; 1488 } 1489 1490 if (!kfd_dbg_has_gws_support(dev) && p->debug_trap_enabled) { 1491 retval = -EBUSY; 1492 goto out_unlock; 1493 } 1494 1495 retval = pqm_set_gws(&p->pqm, args->queue_id, args->num_gws ? dev->gws : NULL); 1496 mutex_unlock(&p->mutex); 1497 1498 args->first_gws = 0; 1499 return retval; 1500 1501 out_unlock: 1502 mutex_unlock(&p->mutex); 1503 return retval; 1504 } 1505 1506 static int kfd_ioctl_get_dmabuf_info(struct file *filep, 1507 struct kfd_process *p, void *data) 1508 { 1509 struct kfd_ioctl_get_dmabuf_info_args *args = data; 1510 struct kfd_node *dev = NULL; 1511 struct amdgpu_device *dmabuf_adev; 1512 void *metadata_buffer = NULL; 1513 uint32_t flags; 1514 int8_t xcp_id; 1515 unsigned int i; 1516 int r; 1517 1518 /* Find a KFD GPU device that supports the get_dmabuf_info query */ 1519 for (i = 0; kfd_topology_enum_kfd_devices(i, &dev) == 0; i++) 1520 if (dev) 1521 break; 1522 if (!dev) 1523 return -EINVAL; 1524 1525 if (args->metadata_ptr) { 1526 metadata_buffer = kzalloc(args->metadata_size, GFP_KERNEL); 1527 if (!metadata_buffer) 1528 return -ENOMEM; 1529 } 1530 1531 /* Get dmabuf info from KGD */ 1532 r = amdgpu_amdkfd_get_dmabuf_info(dev->adev, args->dmabuf_fd, 1533 &dmabuf_adev, &args->size, 1534 metadata_buffer, args->metadata_size, 1535 &args->metadata_size, &flags, &xcp_id); 1536 if (r) 1537 goto exit; 1538 1539 if (xcp_id >= 0) 1540 args->gpu_id = dmabuf_adev->kfd.dev->nodes[xcp_id]->id; 1541 else 1542 args->gpu_id = dmabuf_adev->kfd.dev->nodes[0]->id; 1543 args->flags = flags; 1544 1545 /* Copy metadata buffer to user mode */ 1546 if (metadata_buffer) { 1547 r = copy_to_user((void __user *)args->metadata_ptr, 1548 metadata_buffer, args->metadata_size); 1549 if (r != 0) 1550 r = -EFAULT; 1551 } 1552 1553 exit: 1554 kfree(metadata_buffer); 1555 1556 return r; 1557 } 1558 1559 static int kfd_ioctl_import_dmabuf(struct file *filep, 1560 struct kfd_process *p, void *data) 1561 { 1562 struct kfd_ioctl_import_dmabuf_args *args = data; 1563 struct kfd_process_device *pdd; 1564 struct dma_buf *dmabuf; 1565 int idr_handle; 1566 uint64_t size; 1567 void *mem; 1568 int r; 1569 1570 dmabuf = dma_buf_get(args->dmabuf_fd); 1571 if (IS_ERR(dmabuf)) 1572 return PTR_ERR(dmabuf); 1573 1574 mutex_lock(&p->mutex); 1575 pdd = kfd_process_device_data_by_id(p, args->gpu_id); 1576 if (!pdd) { 1577 r = -EINVAL; 1578 goto err_unlock; 1579 } 1580 1581 pdd = kfd_bind_process_to_device(pdd->dev, p); 1582 if (IS_ERR(pdd)) { 1583 r = PTR_ERR(pdd); 1584 goto err_unlock; 1585 } 1586 1587 r = amdgpu_amdkfd_gpuvm_import_dmabuf(pdd->dev->adev, dmabuf, 1588 args->va_addr, pdd->drm_priv, 1589 (struct kgd_mem **)&mem, &size, 1590 NULL); 1591 if (r) 1592 goto err_unlock; 1593 1594 idr_handle = kfd_process_device_create_obj_handle(pdd, mem); 1595 if (idr_handle < 0) { 1596 r = -EFAULT; 1597 goto err_free; 1598 } 1599 1600 mutex_unlock(&p->mutex); 1601 dma_buf_put(dmabuf); 1602 1603 args->handle = MAKE_HANDLE(args->gpu_id, idr_handle); 1604 1605 return 0; 1606 1607 err_free: 1608 amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->adev, (struct kgd_mem *)mem, 1609 pdd->drm_priv, NULL); 1610 err_unlock: 1611 mutex_unlock(&p->mutex); 1612 dma_buf_put(dmabuf); 1613 return r; 1614 } 1615 1616 static int kfd_ioctl_export_dmabuf(struct file *filep, 1617 struct kfd_process *p, void *data) 1618 { 1619 struct kfd_ioctl_export_dmabuf_args *args = data; 1620 struct kfd_process_device *pdd; 1621 struct dma_buf *dmabuf; 1622 struct kfd_node *dev; 1623 void *mem; 1624 int ret = 0; 1625 1626 dev = kfd_device_by_id(GET_GPU_ID(args->handle)); 1627 if (!dev) 1628 return -EINVAL; 1629 1630 mutex_lock(&p->mutex); 1631 1632 pdd = kfd_get_process_device_data(dev, p); 1633 if (!pdd) { 1634 ret = -EINVAL; 1635 goto err_unlock; 1636 } 1637 1638 mem = kfd_process_device_translate_handle(pdd, 1639 GET_IDR_HANDLE(args->handle)); 1640 if (!mem) { 1641 ret = -EINVAL; 1642 goto err_unlock; 1643 } 1644 1645 ret = amdgpu_amdkfd_gpuvm_export_dmabuf(mem, &dmabuf); 1646 mutex_unlock(&p->mutex); 1647 if (ret) 1648 goto err_out; 1649 1650 ret = dma_buf_fd(dmabuf, args->flags); 1651 if (ret < 0) { 1652 dma_buf_put(dmabuf); 1653 goto err_out; 1654 } 1655 /* dma_buf_fd assigns the reference count to the fd, no need to 1656 * put the reference here. 1657 */ 1658 args->dmabuf_fd = ret; 1659 1660 return 0; 1661 1662 err_unlock: 1663 mutex_unlock(&p->mutex); 1664 err_out: 1665 return ret; 1666 } 1667 1668 /* Handle requests for watching SMI events */ 1669 static int kfd_ioctl_smi_events(struct file *filep, 1670 struct kfd_process *p, void *data) 1671 { 1672 struct kfd_ioctl_smi_events_args *args = data; 1673 struct kfd_process_device *pdd; 1674 1675 mutex_lock(&p->mutex); 1676 1677 pdd = kfd_process_device_data_by_id(p, args->gpuid); 1678 mutex_unlock(&p->mutex); 1679 if (!pdd) 1680 return -EINVAL; 1681 1682 return kfd_smi_event_open(pdd->dev, &args->anon_fd); 1683 } 1684 1685 #if IS_ENABLED(CONFIG_HSA_AMD_SVM) 1686 1687 static int kfd_ioctl_set_xnack_mode(struct file *filep, 1688 struct kfd_process *p, void *data) 1689 { 1690 struct kfd_ioctl_set_xnack_mode_args *args = data; 1691 int r = 0; 1692 1693 mutex_lock(&p->mutex); 1694 if (args->xnack_enabled >= 0) { 1695 if (!list_empty(&p->pqm.queues)) { 1696 pr_debug("Process has user queues running\n"); 1697 r = -EBUSY; 1698 goto out_unlock; 1699 } 1700 1701 if (p->xnack_enabled == args->xnack_enabled) 1702 goto out_unlock; 1703 1704 if (args->xnack_enabled && !kfd_process_xnack_mode(p, true)) { 1705 r = -EPERM; 1706 goto out_unlock; 1707 } 1708 1709 r = svm_range_switch_xnack_reserve_mem(p, args->xnack_enabled); 1710 } else { 1711 args->xnack_enabled = p->xnack_enabled; 1712 } 1713 1714 out_unlock: 1715 mutex_unlock(&p->mutex); 1716 1717 return r; 1718 } 1719 1720 static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data) 1721 { 1722 struct kfd_ioctl_svm_args *args = data; 1723 int r = 0; 1724 1725 pr_debug("start 0x%llx size 0x%llx op 0x%x nattr 0x%x\n", 1726 args->start_addr, args->size, args->op, args->nattr); 1727 1728 if ((args->start_addr & ~PAGE_MASK) || (args->size & ~PAGE_MASK)) 1729 return -EINVAL; 1730 if (!args->start_addr || !args->size) 1731 return -EINVAL; 1732 1733 r = svm_ioctl(p, args->op, args->start_addr, args->size, args->nattr, 1734 args->attrs); 1735 1736 return r; 1737 } 1738 #else 1739 static int kfd_ioctl_set_xnack_mode(struct file *filep, 1740 struct kfd_process *p, void *data) 1741 { 1742 return -EPERM; 1743 } 1744 static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data) 1745 { 1746 return -EPERM; 1747 } 1748 #endif 1749 1750 static int criu_checkpoint_process(struct kfd_process *p, 1751 uint8_t __user *user_priv_data, 1752 uint64_t *priv_offset) 1753 { 1754 struct kfd_criu_process_priv_data process_priv; 1755 int ret; 1756 1757 memset(&process_priv, 0, sizeof(process_priv)); 1758 1759 process_priv.version = KFD_CRIU_PRIV_VERSION; 1760 /* For CR, we don't consider negative xnack mode which is used for 1761 * querying without changing it, here 0 simply means disabled and 1 1762 * means enabled so retry for finding a valid PTE. 1763 */ 1764 process_priv.xnack_mode = p->xnack_enabled ? 1 : 0; 1765 1766 ret = copy_to_user(user_priv_data + *priv_offset, 1767 &process_priv, sizeof(process_priv)); 1768 1769 if (ret) { 1770 pr_err("Failed to copy process information to user\n"); 1771 ret = -EFAULT; 1772 } 1773 1774 *priv_offset += sizeof(process_priv); 1775 return ret; 1776 } 1777 1778 static int criu_checkpoint_devices(struct kfd_process *p, 1779 uint32_t num_devices, 1780 uint8_t __user *user_addr, 1781 uint8_t __user *user_priv_data, 1782 uint64_t *priv_offset) 1783 { 1784 struct kfd_criu_device_priv_data *device_priv = NULL; 1785 struct kfd_criu_device_bucket *device_buckets = NULL; 1786 int ret = 0, i; 1787 1788 device_buckets = kvzalloc(num_devices * sizeof(*device_buckets), GFP_KERNEL); 1789 if (!device_buckets) { 1790 ret = -ENOMEM; 1791 goto exit; 1792 } 1793 1794 device_priv = kvzalloc(num_devices * sizeof(*device_priv), GFP_KERNEL); 1795 if (!device_priv) { 1796 ret = -ENOMEM; 1797 goto exit; 1798 } 1799 1800 for (i = 0; i < num_devices; i++) { 1801 struct kfd_process_device *pdd = p->pdds[i]; 1802 1803 device_buckets[i].user_gpu_id = pdd->user_gpu_id; 1804 device_buckets[i].actual_gpu_id = pdd->dev->id; 1805 1806 /* 1807 * priv_data does not contain useful information for now and is reserved for 1808 * future use, so we do not set its contents. 1809 */ 1810 } 1811 1812 ret = copy_to_user(user_addr, device_buckets, num_devices * sizeof(*device_buckets)); 1813 if (ret) { 1814 pr_err("Failed to copy device information to user\n"); 1815 ret = -EFAULT; 1816 goto exit; 1817 } 1818 1819 ret = copy_to_user(user_priv_data + *priv_offset, 1820 device_priv, 1821 num_devices * sizeof(*device_priv)); 1822 if (ret) { 1823 pr_err("Failed to copy device information to user\n"); 1824 ret = -EFAULT; 1825 } 1826 *priv_offset += num_devices * sizeof(*device_priv); 1827 1828 exit: 1829 kvfree(device_buckets); 1830 kvfree(device_priv); 1831 return ret; 1832 } 1833 1834 static uint32_t get_process_num_bos(struct kfd_process *p) 1835 { 1836 uint32_t num_of_bos = 0; 1837 int i; 1838 1839 /* Run over all PDDs of the process */ 1840 for (i = 0; i < p->n_pdds; i++) { 1841 struct kfd_process_device *pdd = p->pdds[i]; 1842 void *mem; 1843 int id; 1844 1845 idr_for_each_entry(&pdd->alloc_idr, mem, id) { 1846 struct kgd_mem *kgd_mem = (struct kgd_mem *)mem; 1847 1848 if ((uint64_t)kgd_mem->va > pdd->gpuvm_base) 1849 num_of_bos++; 1850 } 1851 } 1852 return num_of_bos; 1853 } 1854 1855 static int criu_get_prime_handle(struct drm_gem_object *gobj, int flags, 1856 u32 *shared_fd) 1857 { 1858 struct dma_buf *dmabuf; 1859 int ret; 1860 1861 dmabuf = amdgpu_gem_prime_export(gobj, flags); 1862 if (IS_ERR(dmabuf)) { 1863 ret = PTR_ERR(dmabuf); 1864 pr_err("dmabuf export failed for the BO\n"); 1865 return ret; 1866 } 1867 1868 ret = dma_buf_fd(dmabuf, flags); 1869 if (ret < 0) { 1870 pr_err("dmabuf create fd failed, ret:%d\n", ret); 1871 goto out_free_dmabuf; 1872 } 1873 1874 *shared_fd = ret; 1875 return 0; 1876 1877 out_free_dmabuf: 1878 dma_buf_put(dmabuf); 1879 return ret; 1880 } 1881 1882 static int criu_checkpoint_bos(struct kfd_process *p, 1883 uint32_t num_bos, 1884 uint8_t __user *user_bos, 1885 uint8_t __user *user_priv_data, 1886 uint64_t *priv_offset) 1887 { 1888 struct kfd_criu_bo_bucket *bo_buckets; 1889 struct kfd_criu_bo_priv_data *bo_privs; 1890 int ret = 0, pdd_index, bo_index = 0, id; 1891 void *mem; 1892 1893 bo_buckets = kvzalloc(num_bos * sizeof(*bo_buckets), GFP_KERNEL); 1894 if (!bo_buckets) 1895 return -ENOMEM; 1896 1897 bo_privs = kvzalloc(num_bos * sizeof(*bo_privs), GFP_KERNEL); 1898 if (!bo_privs) { 1899 ret = -ENOMEM; 1900 goto exit; 1901 } 1902 1903 for (pdd_index = 0; pdd_index < p->n_pdds; pdd_index++) { 1904 struct kfd_process_device *pdd = p->pdds[pdd_index]; 1905 struct amdgpu_bo *dumper_bo; 1906 struct kgd_mem *kgd_mem; 1907 1908 idr_for_each_entry(&pdd->alloc_idr, mem, id) { 1909 struct kfd_criu_bo_bucket *bo_bucket; 1910 struct kfd_criu_bo_priv_data *bo_priv; 1911 int i, dev_idx = 0; 1912 1913 if (!mem) { 1914 ret = -ENOMEM; 1915 goto exit; 1916 } 1917 1918 kgd_mem = (struct kgd_mem *)mem; 1919 dumper_bo = kgd_mem->bo; 1920 1921 if ((uint64_t)kgd_mem->va <= pdd->gpuvm_base) 1922 continue; 1923 1924 bo_bucket = &bo_buckets[bo_index]; 1925 bo_priv = &bo_privs[bo_index]; 1926 1927 bo_bucket->gpu_id = pdd->user_gpu_id; 1928 bo_bucket->addr = (uint64_t)kgd_mem->va; 1929 bo_bucket->size = amdgpu_bo_size(dumper_bo); 1930 bo_bucket->alloc_flags = (uint32_t)kgd_mem->alloc_flags; 1931 bo_priv->idr_handle = id; 1932 1933 if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) { 1934 ret = amdgpu_ttm_tt_get_userptr(&dumper_bo->tbo, 1935 &bo_priv->user_addr); 1936 if (ret) { 1937 pr_err("Failed to obtain user address for user-pointer bo\n"); 1938 goto exit; 1939 } 1940 } 1941 if (bo_bucket->alloc_flags 1942 & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT)) { 1943 ret = criu_get_prime_handle(&dumper_bo->tbo.base, 1944 bo_bucket->alloc_flags & 1945 KFD_IOC_ALLOC_MEM_FLAGS_WRITABLE ? DRM_RDWR : 0, 1946 &bo_bucket->dmabuf_fd); 1947 if (ret) 1948 goto exit; 1949 } else { 1950 bo_bucket->dmabuf_fd = KFD_INVALID_FD; 1951 } 1952 1953 if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) 1954 bo_bucket->offset = KFD_MMAP_TYPE_DOORBELL | 1955 KFD_MMAP_GPU_ID(pdd->dev->id); 1956 else if (bo_bucket->alloc_flags & 1957 KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) 1958 bo_bucket->offset = KFD_MMAP_TYPE_MMIO | 1959 KFD_MMAP_GPU_ID(pdd->dev->id); 1960 else 1961 bo_bucket->offset = amdgpu_bo_mmap_offset(dumper_bo); 1962 1963 for (i = 0; i < p->n_pdds; i++) { 1964 if (amdgpu_amdkfd_bo_mapped_to_dev(p->pdds[i]->dev->adev, kgd_mem)) 1965 bo_priv->mapped_gpuids[dev_idx++] = p->pdds[i]->user_gpu_id; 1966 } 1967 1968 pr_debug("bo_size = 0x%llx, bo_addr = 0x%llx bo_offset = 0x%llx\n" 1969 "gpu_id = 0x%x alloc_flags = 0x%x idr_handle = 0x%x", 1970 bo_bucket->size, 1971 bo_bucket->addr, 1972 bo_bucket->offset, 1973 bo_bucket->gpu_id, 1974 bo_bucket->alloc_flags, 1975 bo_priv->idr_handle); 1976 bo_index++; 1977 } 1978 } 1979 1980 ret = copy_to_user(user_bos, bo_buckets, num_bos * sizeof(*bo_buckets)); 1981 if (ret) { 1982 pr_err("Failed to copy BO information to user\n"); 1983 ret = -EFAULT; 1984 goto exit; 1985 } 1986 1987 ret = copy_to_user(user_priv_data + *priv_offset, bo_privs, num_bos * sizeof(*bo_privs)); 1988 if (ret) { 1989 pr_err("Failed to copy BO priv information to user\n"); 1990 ret = -EFAULT; 1991 goto exit; 1992 } 1993 1994 *priv_offset += num_bos * sizeof(*bo_privs); 1995 1996 exit: 1997 while (ret && bo_index--) { 1998 if (bo_buckets[bo_index].alloc_flags 1999 & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT)) 2000 close_fd(bo_buckets[bo_index].dmabuf_fd); 2001 } 2002 2003 kvfree(bo_buckets); 2004 kvfree(bo_privs); 2005 return ret; 2006 } 2007 2008 static int criu_get_process_object_info(struct kfd_process *p, 2009 uint32_t *num_devices, 2010 uint32_t *num_bos, 2011 uint32_t *num_objects, 2012 uint64_t *objs_priv_size) 2013 { 2014 uint64_t queues_priv_data_size, svm_priv_data_size, priv_size; 2015 uint32_t num_queues, num_events, num_svm_ranges; 2016 int ret; 2017 2018 *num_devices = p->n_pdds; 2019 *num_bos = get_process_num_bos(p); 2020 2021 ret = kfd_process_get_queue_info(p, &num_queues, &queues_priv_data_size); 2022 if (ret) 2023 return ret; 2024 2025 num_events = kfd_get_num_events(p); 2026 2027 ret = svm_range_get_info(p, &num_svm_ranges, &svm_priv_data_size); 2028 if (ret) 2029 return ret; 2030 2031 *num_objects = num_queues + num_events + num_svm_ranges; 2032 2033 if (objs_priv_size) { 2034 priv_size = sizeof(struct kfd_criu_process_priv_data); 2035 priv_size += *num_devices * sizeof(struct kfd_criu_device_priv_data); 2036 priv_size += *num_bos * sizeof(struct kfd_criu_bo_priv_data); 2037 priv_size += queues_priv_data_size; 2038 priv_size += num_events * sizeof(struct kfd_criu_event_priv_data); 2039 priv_size += svm_priv_data_size; 2040 *objs_priv_size = priv_size; 2041 } 2042 return 0; 2043 } 2044 2045 static int criu_checkpoint(struct file *filep, 2046 struct kfd_process *p, 2047 struct kfd_ioctl_criu_args *args) 2048 { 2049 int ret; 2050 uint32_t num_devices, num_bos, num_objects; 2051 uint64_t priv_size, priv_offset = 0, bo_priv_offset; 2052 2053 if (!args->devices || !args->bos || !args->priv_data) 2054 return -EINVAL; 2055 2056 mutex_lock(&p->mutex); 2057 2058 if (!p->n_pdds) { 2059 pr_err("No pdd for given process\n"); 2060 ret = -ENODEV; 2061 goto exit_unlock; 2062 } 2063 2064 /* Confirm all process queues are evicted */ 2065 if (!p->queues_paused) { 2066 pr_err("Cannot dump process when queues are not in evicted state\n"); 2067 /* CRIU plugin did not call op PROCESS_INFO before checkpointing */ 2068 ret = -EINVAL; 2069 goto exit_unlock; 2070 } 2071 2072 ret = criu_get_process_object_info(p, &num_devices, &num_bos, &num_objects, &priv_size); 2073 if (ret) 2074 goto exit_unlock; 2075 2076 if (num_devices != args->num_devices || 2077 num_bos != args->num_bos || 2078 num_objects != args->num_objects || 2079 priv_size != args->priv_data_size) { 2080 2081 ret = -EINVAL; 2082 goto exit_unlock; 2083 } 2084 2085 /* each function will store private data inside priv_data and adjust priv_offset */ 2086 ret = criu_checkpoint_process(p, (uint8_t __user *)args->priv_data, &priv_offset); 2087 if (ret) 2088 goto exit_unlock; 2089 2090 ret = criu_checkpoint_devices(p, num_devices, (uint8_t __user *)args->devices, 2091 (uint8_t __user *)args->priv_data, &priv_offset); 2092 if (ret) 2093 goto exit_unlock; 2094 2095 /* Leave room for BOs in the private data. They need to be restored 2096 * before events, but we checkpoint them last to simplify the error 2097 * handling. 2098 */ 2099 bo_priv_offset = priv_offset; 2100 priv_offset += num_bos * sizeof(struct kfd_criu_bo_priv_data); 2101 2102 if (num_objects) { 2103 ret = kfd_criu_checkpoint_queues(p, (uint8_t __user *)args->priv_data, 2104 &priv_offset); 2105 if (ret) 2106 goto exit_unlock; 2107 2108 ret = kfd_criu_checkpoint_events(p, (uint8_t __user *)args->priv_data, 2109 &priv_offset); 2110 if (ret) 2111 goto exit_unlock; 2112 2113 ret = kfd_criu_checkpoint_svm(p, (uint8_t __user *)args->priv_data, &priv_offset); 2114 if (ret) 2115 goto exit_unlock; 2116 } 2117 2118 /* This must be the last thing in this function that can fail. 2119 * Otherwise we leak dmabuf file descriptors. 2120 */ 2121 ret = criu_checkpoint_bos(p, num_bos, (uint8_t __user *)args->bos, 2122 (uint8_t __user *)args->priv_data, &bo_priv_offset); 2123 2124 exit_unlock: 2125 mutex_unlock(&p->mutex); 2126 if (ret) 2127 pr_err("Failed to dump CRIU ret:%d\n", ret); 2128 else 2129 pr_debug("CRIU dump ret:%d\n", ret); 2130 2131 return ret; 2132 } 2133 2134 static int criu_restore_process(struct kfd_process *p, 2135 struct kfd_ioctl_criu_args *args, 2136 uint64_t *priv_offset, 2137 uint64_t max_priv_data_size) 2138 { 2139 int ret = 0; 2140 struct kfd_criu_process_priv_data process_priv; 2141 2142 if (*priv_offset + sizeof(process_priv) > max_priv_data_size) 2143 return -EINVAL; 2144 2145 ret = copy_from_user(&process_priv, 2146 (void __user *)(args->priv_data + *priv_offset), 2147 sizeof(process_priv)); 2148 if (ret) { 2149 pr_err("Failed to copy process private information from user\n"); 2150 ret = -EFAULT; 2151 goto exit; 2152 } 2153 *priv_offset += sizeof(process_priv); 2154 2155 if (process_priv.version != KFD_CRIU_PRIV_VERSION) { 2156 pr_err("Invalid CRIU API version (checkpointed:%d current:%d)\n", 2157 process_priv.version, KFD_CRIU_PRIV_VERSION); 2158 return -EINVAL; 2159 } 2160 2161 pr_debug("Setting XNACK mode\n"); 2162 if (process_priv.xnack_mode && !kfd_process_xnack_mode(p, true)) { 2163 pr_err("xnack mode cannot be set\n"); 2164 ret = -EPERM; 2165 goto exit; 2166 } else { 2167 pr_debug("set xnack mode: %d\n", process_priv.xnack_mode); 2168 p->xnack_enabled = process_priv.xnack_mode; 2169 } 2170 2171 exit: 2172 return ret; 2173 } 2174 2175 static int criu_restore_devices(struct kfd_process *p, 2176 struct kfd_ioctl_criu_args *args, 2177 uint64_t *priv_offset, 2178 uint64_t max_priv_data_size) 2179 { 2180 struct kfd_criu_device_bucket *device_buckets; 2181 struct kfd_criu_device_priv_data *device_privs; 2182 int ret = 0; 2183 uint32_t i; 2184 2185 if (args->num_devices != p->n_pdds) 2186 return -EINVAL; 2187 2188 if (*priv_offset + (args->num_devices * sizeof(*device_privs)) > max_priv_data_size) 2189 return -EINVAL; 2190 2191 device_buckets = kmalloc_array(args->num_devices, sizeof(*device_buckets), GFP_KERNEL); 2192 if (!device_buckets) 2193 return -ENOMEM; 2194 2195 ret = copy_from_user(device_buckets, (void __user *)args->devices, 2196 args->num_devices * sizeof(*device_buckets)); 2197 if (ret) { 2198 pr_err("Failed to copy devices buckets from user\n"); 2199 ret = -EFAULT; 2200 goto exit; 2201 } 2202 2203 for (i = 0; i < args->num_devices; i++) { 2204 struct kfd_node *dev; 2205 struct kfd_process_device *pdd; 2206 struct file *drm_file; 2207 2208 /* device private data is not currently used */ 2209 2210 if (!device_buckets[i].user_gpu_id) { 2211 pr_err("Invalid user gpu_id\n"); 2212 ret = -EINVAL; 2213 goto exit; 2214 } 2215 2216 dev = kfd_device_by_id(device_buckets[i].actual_gpu_id); 2217 if (!dev) { 2218 pr_err("Failed to find device with gpu_id = %x\n", 2219 device_buckets[i].actual_gpu_id); 2220 ret = -EINVAL; 2221 goto exit; 2222 } 2223 2224 pdd = kfd_get_process_device_data(dev, p); 2225 if (!pdd) { 2226 pr_err("Failed to get pdd for gpu_id = %x\n", 2227 device_buckets[i].actual_gpu_id); 2228 ret = -EINVAL; 2229 goto exit; 2230 } 2231 pdd->user_gpu_id = device_buckets[i].user_gpu_id; 2232 2233 drm_file = fget(device_buckets[i].drm_fd); 2234 if (!drm_file) { 2235 pr_err("Invalid render node file descriptor sent from plugin (%d)\n", 2236 device_buckets[i].drm_fd); 2237 ret = -EINVAL; 2238 goto exit; 2239 } 2240 2241 if (pdd->drm_file) { 2242 ret = -EINVAL; 2243 goto exit; 2244 } 2245 2246 /* create the vm using render nodes for kfd pdd */ 2247 if (kfd_process_device_init_vm(pdd, drm_file)) { 2248 pr_err("could not init vm for given pdd\n"); 2249 /* On success, the PDD keeps the drm_file reference */ 2250 fput(drm_file); 2251 ret = -EINVAL; 2252 goto exit; 2253 } 2254 /* 2255 * pdd now already has the vm bound to render node so below api won't create a new 2256 * exclusive kfd mapping but use existing one with renderDXXX but is still needed 2257 * for iommu v2 binding and runtime pm. 2258 */ 2259 pdd = kfd_bind_process_to_device(dev, p); 2260 if (IS_ERR(pdd)) { 2261 ret = PTR_ERR(pdd); 2262 goto exit; 2263 } 2264 2265 if (!pdd->doorbell_index && 2266 kfd_alloc_process_doorbells(pdd->dev->kfd, &pdd->doorbell_index) < 0) { 2267 ret = -ENOMEM; 2268 goto exit; 2269 } 2270 } 2271 2272 /* 2273 * We are not copying device private data from user as we are not using the data for now, 2274 * but we still adjust for its private data. 2275 */ 2276 *priv_offset += args->num_devices * sizeof(*device_privs); 2277 2278 exit: 2279 kfree(device_buckets); 2280 return ret; 2281 } 2282 2283 static int criu_restore_memory_of_gpu(struct kfd_process_device *pdd, 2284 struct kfd_criu_bo_bucket *bo_bucket, 2285 struct kfd_criu_bo_priv_data *bo_priv, 2286 struct kgd_mem **kgd_mem) 2287 { 2288 int idr_handle; 2289 int ret; 2290 const bool criu_resume = true; 2291 u64 offset; 2292 2293 if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) { 2294 if (bo_bucket->size != 2295 kfd_doorbell_process_slice(pdd->dev->kfd)) 2296 return -EINVAL; 2297 2298 offset = kfd_get_process_doorbells(pdd); 2299 if (!offset) 2300 return -ENOMEM; 2301 } else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) { 2302 /* MMIO BOs need remapped bus address */ 2303 if (bo_bucket->size != PAGE_SIZE) { 2304 pr_err("Invalid page size\n"); 2305 return -EINVAL; 2306 } 2307 offset = pdd->dev->adev->rmmio_remap.bus_addr; 2308 if (!offset) { 2309 pr_err("amdgpu_amdkfd_get_mmio_remap_phys_addr failed\n"); 2310 return -ENOMEM; 2311 } 2312 } else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) { 2313 offset = bo_priv->user_addr; 2314 } 2315 /* Create the BO */ 2316 ret = amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(pdd->dev->adev, bo_bucket->addr, 2317 bo_bucket->size, pdd->drm_priv, kgd_mem, 2318 &offset, bo_bucket->alloc_flags, criu_resume); 2319 if (ret) { 2320 pr_err("Could not create the BO\n"); 2321 return ret; 2322 } 2323 pr_debug("New BO created: size:0x%llx addr:0x%llx offset:0x%llx\n", 2324 bo_bucket->size, bo_bucket->addr, offset); 2325 2326 /* Restore previous IDR handle */ 2327 pr_debug("Restoring old IDR handle for the BO"); 2328 idr_handle = idr_alloc(&pdd->alloc_idr, *kgd_mem, bo_priv->idr_handle, 2329 bo_priv->idr_handle + 1, GFP_KERNEL); 2330 2331 if (idr_handle < 0) { 2332 pr_err("Could not allocate idr\n"); 2333 amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->adev, *kgd_mem, pdd->drm_priv, 2334 NULL); 2335 return -ENOMEM; 2336 } 2337 2338 if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) 2339 bo_bucket->restored_offset = KFD_MMAP_TYPE_DOORBELL | KFD_MMAP_GPU_ID(pdd->dev->id); 2340 if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) { 2341 bo_bucket->restored_offset = KFD_MMAP_TYPE_MMIO | KFD_MMAP_GPU_ID(pdd->dev->id); 2342 } else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_GTT) { 2343 bo_bucket->restored_offset = offset; 2344 } else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) { 2345 bo_bucket->restored_offset = offset; 2346 /* Update the VRAM usage count */ 2347 WRITE_ONCE(pdd->vram_usage, pdd->vram_usage + bo_bucket->size); 2348 } 2349 return 0; 2350 } 2351 2352 static int criu_restore_bo(struct kfd_process *p, 2353 struct kfd_criu_bo_bucket *bo_bucket, 2354 struct kfd_criu_bo_priv_data *bo_priv) 2355 { 2356 struct kfd_process_device *pdd; 2357 struct kgd_mem *kgd_mem; 2358 int ret; 2359 int j; 2360 2361 pr_debug("Restoring BO size:0x%llx addr:0x%llx gpu_id:0x%x flags:0x%x idr_handle:0x%x\n", 2362 bo_bucket->size, bo_bucket->addr, bo_bucket->gpu_id, bo_bucket->alloc_flags, 2363 bo_priv->idr_handle); 2364 2365 pdd = kfd_process_device_data_by_id(p, bo_bucket->gpu_id); 2366 if (!pdd) { 2367 pr_err("Failed to get pdd\n"); 2368 return -ENODEV; 2369 } 2370 2371 ret = criu_restore_memory_of_gpu(pdd, bo_bucket, bo_priv, &kgd_mem); 2372 if (ret) 2373 return ret; 2374 2375 /* now map these BOs to GPU/s */ 2376 for (j = 0; j < p->n_pdds; j++) { 2377 struct kfd_node *peer; 2378 struct kfd_process_device *peer_pdd; 2379 2380 if (!bo_priv->mapped_gpuids[j]) 2381 break; 2382 2383 peer_pdd = kfd_process_device_data_by_id(p, bo_priv->mapped_gpuids[j]); 2384 if (!peer_pdd) 2385 return -EINVAL; 2386 2387 peer = peer_pdd->dev; 2388 2389 peer_pdd = kfd_bind_process_to_device(peer, p); 2390 if (IS_ERR(peer_pdd)) 2391 return PTR_ERR(peer_pdd); 2392 2393 ret = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(peer->adev, kgd_mem, 2394 peer_pdd->drm_priv); 2395 if (ret) { 2396 pr_err("Failed to map to gpu %d/%d\n", j, p->n_pdds); 2397 return ret; 2398 } 2399 } 2400 2401 pr_debug("map memory was successful for the BO\n"); 2402 /* create the dmabuf object and export the bo */ 2403 if (bo_bucket->alloc_flags 2404 & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT)) { 2405 ret = criu_get_prime_handle(&kgd_mem->bo->tbo.base, DRM_RDWR, 2406 &bo_bucket->dmabuf_fd); 2407 if (ret) 2408 return ret; 2409 } else { 2410 bo_bucket->dmabuf_fd = KFD_INVALID_FD; 2411 } 2412 2413 return 0; 2414 } 2415 2416 static int criu_restore_bos(struct kfd_process *p, 2417 struct kfd_ioctl_criu_args *args, 2418 uint64_t *priv_offset, 2419 uint64_t max_priv_data_size) 2420 { 2421 struct kfd_criu_bo_bucket *bo_buckets = NULL; 2422 struct kfd_criu_bo_priv_data *bo_privs = NULL; 2423 int ret = 0; 2424 uint32_t i = 0; 2425 2426 if (*priv_offset + (args->num_bos * sizeof(*bo_privs)) > max_priv_data_size) 2427 return -EINVAL; 2428 2429 /* Prevent MMU notifications until stage-4 IOCTL (CRIU_RESUME) is received */ 2430 amdgpu_amdkfd_block_mmu_notifications(p->kgd_process_info); 2431 2432 bo_buckets = kvmalloc_array(args->num_bos, sizeof(*bo_buckets), GFP_KERNEL); 2433 if (!bo_buckets) 2434 return -ENOMEM; 2435 2436 ret = copy_from_user(bo_buckets, (void __user *)args->bos, 2437 args->num_bos * sizeof(*bo_buckets)); 2438 if (ret) { 2439 pr_err("Failed to copy BOs information from user\n"); 2440 ret = -EFAULT; 2441 goto exit; 2442 } 2443 2444 bo_privs = kvmalloc_array(args->num_bos, sizeof(*bo_privs), GFP_KERNEL); 2445 if (!bo_privs) { 2446 ret = -ENOMEM; 2447 goto exit; 2448 } 2449 2450 ret = copy_from_user(bo_privs, (void __user *)args->priv_data + *priv_offset, 2451 args->num_bos * sizeof(*bo_privs)); 2452 if (ret) { 2453 pr_err("Failed to copy BOs information from user\n"); 2454 ret = -EFAULT; 2455 goto exit; 2456 } 2457 *priv_offset += args->num_bos * sizeof(*bo_privs); 2458 2459 /* Create and map new BOs */ 2460 for (; i < args->num_bos; i++) { 2461 ret = criu_restore_bo(p, &bo_buckets[i], &bo_privs[i]); 2462 if (ret) { 2463 pr_debug("Failed to restore BO[%d] ret%d\n", i, ret); 2464 goto exit; 2465 } 2466 } /* done */ 2467 2468 /* Copy only the buckets back so user can read bo_buckets[N].restored_offset */ 2469 ret = copy_to_user((void __user *)args->bos, 2470 bo_buckets, 2471 (args->num_bos * sizeof(*bo_buckets))); 2472 if (ret) 2473 ret = -EFAULT; 2474 2475 exit: 2476 while (ret && i--) { 2477 if (bo_buckets[i].alloc_flags 2478 & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT)) 2479 close_fd(bo_buckets[i].dmabuf_fd); 2480 } 2481 kvfree(bo_buckets); 2482 kvfree(bo_privs); 2483 return ret; 2484 } 2485 2486 static int criu_restore_objects(struct file *filep, 2487 struct kfd_process *p, 2488 struct kfd_ioctl_criu_args *args, 2489 uint64_t *priv_offset, 2490 uint64_t max_priv_data_size) 2491 { 2492 int ret = 0; 2493 uint32_t i; 2494 2495 BUILD_BUG_ON(offsetof(struct kfd_criu_queue_priv_data, object_type)); 2496 BUILD_BUG_ON(offsetof(struct kfd_criu_event_priv_data, object_type)); 2497 BUILD_BUG_ON(offsetof(struct kfd_criu_svm_range_priv_data, object_type)); 2498 2499 for (i = 0; i < args->num_objects; i++) { 2500 uint32_t object_type; 2501 2502 if (*priv_offset + sizeof(object_type) > max_priv_data_size) { 2503 pr_err("Invalid private data size\n"); 2504 return -EINVAL; 2505 } 2506 2507 ret = get_user(object_type, (uint32_t __user *)(args->priv_data + *priv_offset)); 2508 if (ret) { 2509 pr_err("Failed to copy private information from user\n"); 2510 goto exit; 2511 } 2512 2513 switch (object_type) { 2514 case KFD_CRIU_OBJECT_TYPE_QUEUE: 2515 ret = kfd_criu_restore_queue(p, (uint8_t __user *)args->priv_data, 2516 priv_offset, max_priv_data_size); 2517 if (ret) 2518 goto exit; 2519 break; 2520 case KFD_CRIU_OBJECT_TYPE_EVENT: 2521 ret = kfd_criu_restore_event(filep, p, (uint8_t __user *)args->priv_data, 2522 priv_offset, max_priv_data_size); 2523 if (ret) 2524 goto exit; 2525 break; 2526 case KFD_CRIU_OBJECT_TYPE_SVM_RANGE: 2527 ret = kfd_criu_restore_svm(p, (uint8_t __user *)args->priv_data, 2528 priv_offset, max_priv_data_size); 2529 if (ret) 2530 goto exit; 2531 break; 2532 default: 2533 pr_err("Invalid object type:%u at index:%d\n", object_type, i); 2534 ret = -EINVAL; 2535 goto exit; 2536 } 2537 } 2538 exit: 2539 return ret; 2540 } 2541 2542 static int criu_restore(struct file *filep, 2543 struct kfd_process *p, 2544 struct kfd_ioctl_criu_args *args) 2545 { 2546 uint64_t priv_offset = 0; 2547 int ret = 0; 2548 2549 pr_debug("CRIU restore (num_devices:%u num_bos:%u num_objects:%u priv_data_size:%llu)\n", 2550 args->num_devices, args->num_bos, args->num_objects, args->priv_data_size); 2551 2552 if (!args->bos || !args->devices || !args->priv_data || !args->priv_data_size || 2553 !args->num_devices || !args->num_bos) 2554 return -EINVAL; 2555 2556 mutex_lock(&p->mutex); 2557 2558 /* 2559 * Set the process to evicted state to avoid running any new queues before all the memory 2560 * mappings are ready. 2561 */ 2562 ret = kfd_process_evict_queues(p, KFD_QUEUE_EVICTION_CRIU_RESTORE); 2563 if (ret) 2564 goto exit_unlock; 2565 2566 /* Each function will adjust priv_offset based on how many bytes they consumed */ 2567 ret = criu_restore_process(p, args, &priv_offset, args->priv_data_size); 2568 if (ret) 2569 goto exit_unlock; 2570 2571 ret = criu_restore_devices(p, args, &priv_offset, args->priv_data_size); 2572 if (ret) 2573 goto exit_unlock; 2574 2575 ret = criu_restore_bos(p, args, &priv_offset, args->priv_data_size); 2576 if (ret) 2577 goto exit_unlock; 2578 2579 ret = criu_restore_objects(filep, p, args, &priv_offset, args->priv_data_size); 2580 if (ret) 2581 goto exit_unlock; 2582 2583 if (priv_offset != args->priv_data_size) { 2584 pr_err("Invalid private data size\n"); 2585 ret = -EINVAL; 2586 } 2587 2588 exit_unlock: 2589 mutex_unlock(&p->mutex); 2590 if (ret) 2591 pr_err("Failed to restore CRIU ret:%d\n", ret); 2592 else 2593 pr_debug("CRIU restore successful\n"); 2594 2595 return ret; 2596 } 2597 2598 static int criu_unpause(struct file *filep, 2599 struct kfd_process *p, 2600 struct kfd_ioctl_criu_args *args) 2601 { 2602 int ret; 2603 2604 mutex_lock(&p->mutex); 2605 2606 if (!p->queues_paused) { 2607 mutex_unlock(&p->mutex); 2608 return -EINVAL; 2609 } 2610 2611 ret = kfd_process_restore_queues(p); 2612 if (ret) 2613 pr_err("Failed to unpause queues ret:%d\n", ret); 2614 else 2615 p->queues_paused = false; 2616 2617 mutex_unlock(&p->mutex); 2618 2619 return ret; 2620 } 2621 2622 static int criu_resume(struct file *filep, 2623 struct kfd_process *p, 2624 struct kfd_ioctl_criu_args *args) 2625 { 2626 struct kfd_process *target = NULL; 2627 struct pid *pid = NULL; 2628 int ret = 0; 2629 2630 pr_debug("Inside %s, target pid for criu restore: %d\n", __func__, 2631 args->pid); 2632 2633 pid = find_get_pid(args->pid); 2634 if (!pid) { 2635 pr_err("Cannot find pid info for %i\n", args->pid); 2636 return -ESRCH; 2637 } 2638 2639 pr_debug("calling kfd_lookup_process_by_pid\n"); 2640 target = kfd_lookup_process_by_pid(pid); 2641 2642 put_pid(pid); 2643 2644 if (!target) { 2645 pr_debug("Cannot find process info for %i\n", args->pid); 2646 return -ESRCH; 2647 } 2648 2649 mutex_lock(&target->mutex); 2650 ret = kfd_criu_resume_svm(target); 2651 if (ret) { 2652 pr_err("kfd_criu_resume_svm failed for %i\n", args->pid); 2653 goto exit; 2654 } 2655 2656 ret = amdgpu_amdkfd_criu_resume(target->kgd_process_info); 2657 if (ret) 2658 pr_err("amdgpu_amdkfd_criu_resume failed for %i\n", args->pid); 2659 2660 exit: 2661 mutex_unlock(&target->mutex); 2662 2663 kfd_unref_process(target); 2664 return ret; 2665 } 2666 2667 static int criu_process_info(struct file *filep, 2668 struct kfd_process *p, 2669 struct kfd_ioctl_criu_args *args) 2670 { 2671 int ret = 0; 2672 2673 mutex_lock(&p->mutex); 2674 2675 if (!p->n_pdds) { 2676 pr_err("No pdd for given process\n"); 2677 ret = -ENODEV; 2678 goto err_unlock; 2679 } 2680 2681 ret = kfd_process_evict_queues(p, KFD_QUEUE_EVICTION_CRIU_CHECKPOINT); 2682 if (ret) 2683 goto err_unlock; 2684 2685 p->queues_paused = true; 2686 2687 args->pid = task_pid_nr_ns(p->lead_thread, 2688 task_active_pid_ns(p->lead_thread)); 2689 2690 ret = criu_get_process_object_info(p, &args->num_devices, &args->num_bos, 2691 &args->num_objects, &args->priv_data_size); 2692 if (ret) 2693 goto err_unlock; 2694 2695 dev_dbg(kfd_device, "Num of devices:%u bos:%u objects:%u priv_data_size:%lld\n", 2696 args->num_devices, args->num_bos, args->num_objects, 2697 args->priv_data_size); 2698 2699 err_unlock: 2700 if (ret) { 2701 kfd_process_restore_queues(p); 2702 p->queues_paused = false; 2703 } 2704 mutex_unlock(&p->mutex); 2705 return ret; 2706 } 2707 2708 static int kfd_ioctl_criu(struct file *filep, struct kfd_process *p, void *data) 2709 { 2710 struct kfd_ioctl_criu_args *args = data; 2711 int ret; 2712 2713 dev_dbg(kfd_device, "CRIU operation: %d\n", args->op); 2714 switch (args->op) { 2715 case KFD_CRIU_OP_PROCESS_INFO: 2716 ret = criu_process_info(filep, p, args); 2717 break; 2718 case KFD_CRIU_OP_CHECKPOINT: 2719 ret = criu_checkpoint(filep, p, args); 2720 break; 2721 case KFD_CRIU_OP_UNPAUSE: 2722 ret = criu_unpause(filep, p, args); 2723 break; 2724 case KFD_CRIU_OP_RESTORE: 2725 ret = criu_restore(filep, p, args); 2726 break; 2727 case KFD_CRIU_OP_RESUME: 2728 ret = criu_resume(filep, p, args); 2729 break; 2730 default: 2731 dev_dbg(kfd_device, "Unsupported CRIU operation:%d\n", args->op); 2732 ret = -EINVAL; 2733 break; 2734 } 2735 2736 if (ret) 2737 dev_dbg(kfd_device, "CRIU operation:%d err:%d\n", args->op, ret); 2738 2739 return ret; 2740 } 2741 2742 static int runtime_enable(struct kfd_process *p, uint64_t r_debug, 2743 bool enable_ttmp_setup) 2744 { 2745 int i = 0, ret = 0; 2746 2747 if (p->is_runtime_retry) 2748 goto retry; 2749 2750 if (p->runtime_info.runtime_state != DEBUG_RUNTIME_STATE_DISABLED) 2751 return -EBUSY; 2752 2753 for (i = 0; i < p->n_pdds; i++) { 2754 struct kfd_process_device *pdd = p->pdds[i]; 2755 2756 if (pdd->qpd.queue_count) 2757 return -EEXIST; 2758 } 2759 2760 p->runtime_info.runtime_state = DEBUG_RUNTIME_STATE_ENABLED; 2761 p->runtime_info.r_debug = r_debug; 2762 p->runtime_info.ttmp_setup = enable_ttmp_setup; 2763 2764 if (p->runtime_info.ttmp_setup) { 2765 for (i = 0; i < p->n_pdds; i++) { 2766 struct kfd_process_device *pdd = p->pdds[i]; 2767 2768 if (!kfd_dbg_is_rlc_restore_supported(pdd->dev)) { 2769 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 2770 pdd->dev->kfd2kgd->enable_debug_trap( 2771 pdd->dev->adev, 2772 true, 2773 pdd->dev->vm_info.last_vmid_kfd); 2774 } else if (kfd_dbg_is_per_vmid_supported(pdd->dev)) { 2775 pdd->spi_dbg_override = pdd->dev->kfd2kgd->enable_debug_trap( 2776 pdd->dev->adev, 2777 false, 2778 0); 2779 } 2780 } 2781 } 2782 2783 retry: 2784 if (p->debug_trap_enabled) { 2785 if (!p->is_runtime_retry) { 2786 kfd_dbg_trap_activate(p); 2787 kfd_dbg_ev_raise(KFD_EC_MASK(EC_PROCESS_RUNTIME), 2788 p, NULL, 0, false, NULL, 0); 2789 } 2790 2791 mutex_unlock(&p->mutex); 2792 ret = down_interruptible(&p->runtime_enable_sema); 2793 mutex_lock(&p->mutex); 2794 2795 p->is_runtime_retry = !!ret; 2796 } 2797 2798 return ret; 2799 } 2800 2801 static int runtime_disable(struct kfd_process *p) 2802 { 2803 int i = 0, ret; 2804 bool was_enabled = p->runtime_info.runtime_state == DEBUG_RUNTIME_STATE_ENABLED; 2805 2806 p->runtime_info.runtime_state = DEBUG_RUNTIME_STATE_DISABLED; 2807 p->runtime_info.r_debug = 0; 2808 2809 if (p->debug_trap_enabled) { 2810 if (was_enabled) 2811 kfd_dbg_trap_deactivate(p, false, 0); 2812 2813 if (!p->is_runtime_retry) 2814 kfd_dbg_ev_raise(KFD_EC_MASK(EC_PROCESS_RUNTIME), 2815 p, NULL, 0, false, NULL, 0); 2816 2817 mutex_unlock(&p->mutex); 2818 ret = down_interruptible(&p->runtime_enable_sema); 2819 mutex_lock(&p->mutex); 2820 2821 p->is_runtime_retry = !!ret; 2822 if (ret) 2823 return ret; 2824 } 2825 2826 if (was_enabled && p->runtime_info.ttmp_setup) { 2827 for (i = 0; i < p->n_pdds; i++) { 2828 struct kfd_process_device *pdd = p->pdds[i]; 2829 2830 if (!kfd_dbg_is_rlc_restore_supported(pdd->dev)) 2831 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 2832 } 2833 } 2834 2835 p->runtime_info.ttmp_setup = false; 2836 2837 /* disable ttmp setup */ 2838 for (i = 0; i < p->n_pdds; i++) { 2839 struct kfd_process_device *pdd = p->pdds[i]; 2840 2841 if (kfd_dbg_is_per_vmid_supported(pdd->dev)) { 2842 pdd->spi_dbg_override = 2843 pdd->dev->kfd2kgd->disable_debug_trap( 2844 pdd->dev->adev, 2845 false, 2846 pdd->dev->vm_info.last_vmid_kfd); 2847 2848 if (!pdd->dev->kfd->shared_resources.enable_mes) 2849 debug_refresh_runlist(pdd->dev->dqm); 2850 else 2851 kfd_dbg_set_mes_debug_mode(pdd); 2852 } 2853 } 2854 2855 return 0; 2856 } 2857 2858 static int kfd_ioctl_runtime_enable(struct file *filep, struct kfd_process *p, void *data) 2859 { 2860 struct kfd_ioctl_runtime_enable_args *args = data; 2861 int r; 2862 2863 mutex_lock(&p->mutex); 2864 2865 if (args->mode_mask & KFD_RUNTIME_ENABLE_MODE_ENABLE_MASK) 2866 r = runtime_enable(p, args->r_debug, 2867 !!(args->mode_mask & KFD_RUNTIME_ENABLE_MODE_TTMP_SAVE_MASK)); 2868 else 2869 r = runtime_disable(p); 2870 2871 mutex_unlock(&p->mutex); 2872 2873 return r; 2874 } 2875 2876 static int kfd_ioctl_set_debug_trap(struct file *filep, struct kfd_process *p, void *data) 2877 { 2878 struct kfd_ioctl_dbg_trap_args *args = data; 2879 struct task_struct *thread = NULL; 2880 struct mm_struct *mm = NULL; 2881 struct pid *pid = NULL; 2882 struct kfd_process *target = NULL; 2883 struct kfd_process_device *pdd = NULL; 2884 int r = 0; 2885 2886 if (sched_policy == KFD_SCHED_POLICY_NO_HWS) { 2887 pr_err("Debugging does not support sched_policy %i", sched_policy); 2888 return -EINVAL; 2889 } 2890 2891 pid = find_get_pid(args->pid); 2892 if (!pid) { 2893 pr_debug("Cannot find pid info for %i\n", args->pid); 2894 r = -ESRCH; 2895 goto out; 2896 } 2897 2898 thread = get_pid_task(pid, PIDTYPE_PID); 2899 if (!thread) { 2900 r = -ESRCH; 2901 goto out; 2902 } 2903 2904 mm = get_task_mm(thread); 2905 if (!mm) { 2906 r = -ESRCH; 2907 goto out; 2908 } 2909 2910 if (args->op == KFD_IOC_DBG_TRAP_ENABLE) { 2911 bool create_process; 2912 2913 rcu_read_lock(); 2914 create_process = thread && thread != current && ptrace_parent(thread) == current; 2915 rcu_read_unlock(); 2916 2917 target = create_process ? kfd_create_process(thread) : 2918 kfd_lookup_process_by_pid(pid); 2919 } else { 2920 target = kfd_lookup_process_by_pid(pid); 2921 } 2922 2923 if (IS_ERR_OR_NULL(target)) { 2924 pr_debug("Cannot find process PID %i to debug\n", args->pid); 2925 r = target ? PTR_ERR(target) : -ESRCH; 2926 goto out; 2927 } 2928 2929 /* Check if target is still PTRACED. */ 2930 rcu_read_lock(); 2931 if (target != p && args->op != KFD_IOC_DBG_TRAP_DISABLE 2932 && ptrace_parent(target->lead_thread) != current) { 2933 pr_err("PID %i is not PTRACED and cannot be debugged\n", args->pid); 2934 r = -EPERM; 2935 } 2936 rcu_read_unlock(); 2937 2938 if (r) 2939 goto out; 2940 2941 mutex_lock(&target->mutex); 2942 2943 if (args->op != KFD_IOC_DBG_TRAP_ENABLE && !target->debug_trap_enabled) { 2944 pr_err("PID %i not debug enabled for op %i\n", args->pid, args->op); 2945 r = -EINVAL; 2946 goto unlock_out; 2947 } 2948 2949 if (target->runtime_info.runtime_state != DEBUG_RUNTIME_STATE_ENABLED && 2950 (args->op == KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_OVERRIDE || 2951 args->op == KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_MODE || 2952 args->op == KFD_IOC_DBG_TRAP_SUSPEND_QUEUES || 2953 args->op == KFD_IOC_DBG_TRAP_RESUME_QUEUES || 2954 args->op == KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH || 2955 args->op == KFD_IOC_DBG_TRAP_CLEAR_NODE_ADDRESS_WATCH || 2956 args->op == KFD_IOC_DBG_TRAP_SET_FLAGS)) { 2957 r = -EPERM; 2958 goto unlock_out; 2959 } 2960 2961 if (args->op == KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH || 2962 args->op == KFD_IOC_DBG_TRAP_CLEAR_NODE_ADDRESS_WATCH) { 2963 int user_gpu_id = kfd_process_get_user_gpu_id(target, 2964 args->op == KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH ? 2965 args->set_node_address_watch.gpu_id : 2966 args->clear_node_address_watch.gpu_id); 2967 2968 pdd = kfd_process_device_data_by_id(target, user_gpu_id); 2969 if (user_gpu_id == -EINVAL || !pdd) { 2970 r = -ENODEV; 2971 goto unlock_out; 2972 } 2973 } 2974 2975 switch (args->op) { 2976 case KFD_IOC_DBG_TRAP_ENABLE: 2977 if (target != p) 2978 target->debugger_process = p; 2979 2980 r = kfd_dbg_trap_enable(target, 2981 args->enable.dbg_fd, 2982 (void __user *)args->enable.rinfo_ptr, 2983 &args->enable.rinfo_size); 2984 if (!r) 2985 target->exception_enable_mask = args->enable.exception_mask; 2986 2987 break; 2988 case KFD_IOC_DBG_TRAP_DISABLE: 2989 r = kfd_dbg_trap_disable(target); 2990 break; 2991 case KFD_IOC_DBG_TRAP_SEND_RUNTIME_EVENT: 2992 r = kfd_dbg_send_exception_to_runtime(target, 2993 args->send_runtime_event.gpu_id, 2994 args->send_runtime_event.queue_id, 2995 args->send_runtime_event.exception_mask); 2996 break; 2997 case KFD_IOC_DBG_TRAP_SET_EXCEPTIONS_ENABLED: 2998 kfd_dbg_set_enabled_debug_exception_mask(target, 2999 args->set_exceptions_enabled.exception_mask); 3000 break; 3001 case KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_OVERRIDE: 3002 r = kfd_dbg_trap_set_wave_launch_override(target, 3003 args->launch_override.override_mode, 3004 args->launch_override.enable_mask, 3005 args->launch_override.support_request_mask, 3006 &args->launch_override.enable_mask, 3007 &args->launch_override.support_request_mask); 3008 break; 3009 case KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_MODE: 3010 r = kfd_dbg_trap_set_wave_launch_mode(target, 3011 args->launch_mode.launch_mode); 3012 break; 3013 case KFD_IOC_DBG_TRAP_SUSPEND_QUEUES: 3014 r = suspend_queues(target, 3015 args->suspend_queues.num_queues, 3016 args->suspend_queues.grace_period, 3017 args->suspend_queues.exception_mask, 3018 (uint32_t *)args->suspend_queues.queue_array_ptr); 3019 3020 break; 3021 case KFD_IOC_DBG_TRAP_RESUME_QUEUES: 3022 r = resume_queues(target, args->resume_queues.num_queues, 3023 (uint32_t *)args->resume_queues.queue_array_ptr); 3024 break; 3025 case KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH: 3026 r = kfd_dbg_trap_set_dev_address_watch(pdd, 3027 args->set_node_address_watch.address, 3028 args->set_node_address_watch.mask, 3029 &args->set_node_address_watch.id, 3030 args->set_node_address_watch.mode); 3031 break; 3032 case KFD_IOC_DBG_TRAP_CLEAR_NODE_ADDRESS_WATCH: 3033 r = kfd_dbg_trap_clear_dev_address_watch(pdd, 3034 args->clear_node_address_watch.id); 3035 break; 3036 case KFD_IOC_DBG_TRAP_SET_FLAGS: 3037 r = kfd_dbg_trap_set_flags(target, &args->set_flags.flags); 3038 break; 3039 case KFD_IOC_DBG_TRAP_QUERY_DEBUG_EVENT: 3040 r = kfd_dbg_ev_query_debug_event(target, 3041 &args->query_debug_event.queue_id, 3042 &args->query_debug_event.gpu_id, 3043 args->query_debug_event.exception_mask, 3044 &args->query_debug_event.exception_mask); 3045 break; 3046 case KFD_IOC_DBG_TRAP_QUERY_EXCEPTION_INFO: 3047 r = kfd_dbg_trap_query_exception_info(target, 3048 args->query_exception_info.source_id, 3049 args->query_exception_info.exception_code, 3050 args->query_exception_info.clear_exception, 3051 (void __user *)args->query_exception_info.info_ptr, 3052 &args->query_exception_info.info_size); 3053 break; 3054 case KFD_IOC_DBG_TRAP_GET_QUEUE_SNAPSHOT: 3055 r = pqm_get_queue_snapshot(&target->pqm, 3056 args->queue_snapshot.exception_mask, 3057 (void __user *)args->queue_snapshot.snapshot_buf_ptr, 3058 &args->queue_snapshot.num_queues, 3059 &args->queue_snapshot.entry_size); 3060 break; 3061 case KFD_IOC_DBG_TRAP_GET_DEVICE_SNAPSHOT: 3062 r = kfd_dbg_trap_device_snapshot(target, 3063 args->device_snapshot.exception_mask, 3064 (void __user *)args->device_snapshot.snapshot_buf_ptr, 3065 &args->device_snapshot.num_devices, 3066 &args->device_snapshot.entry_size); 3067 break; 3068 default: 3069 pr_err("Invalid option: %i\n", args->op); 3070 r = -EINVAL; 3071 } 3072 3073 unlock_out: 3074 mutex_unlock(&target->mutex); 3075 3076 out: 3077 if (thread) 3078 put_task_struct(thread); 3079 3080 if (mm) 3081 mmput(mm); 3082 3083 if (pid) 3084 put_pid(pid); 3085 3086 if (target) 3087 kfd_unref_process(target); 3088 3089 return r; 3090 } 3091 3092 #define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \ 3093 [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, \ 3094 .cmd_drv = 0, .name = #ioctl} 3095 3096 /** Ioctl table */ 3097 static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = { 3098 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_VERSION, 3099 kfd_ioctl_get_version, 0), 3100 3101 AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_QUEUE, 3102 kfd_ioctl_create_queue, 0), 3103 3104 AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_QUEUE, 3105 kfd_ioctl_destroy_queue, 0), 3106 3107 AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_MEMORY_POLICY, 3108 kfd_ioctl_set_memory_policy, 0), 3109 3110 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_CLOCK_COUNTERS, 3111 kfd_ioctl_get_clock_counters, 0), 3112 3113 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES, 3114 kfd_ioctl_get_process_apertures, 0), 3115 3116 AMDKFD_IOCTL_DEF(AMDKFD_IOC_UPDATE_QUEUE, 3117 kfd_ioctl_update_queue, 0), 3118 3119 AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_EVENT, 3120 kfd_ioctl_create_event, 0), 3121 3122 AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_EVENT, 3123 kfd_ioctl_destroy_event, 0), 3124 3125 AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_EVENT, 3126 kfd_ioctl_set_event, 0), 3127 3128 AMDKFD_IOCTL_DEF(AMDKFD_IOC_RESET_EVENT, 3129 kfd_ioctl_reset_event, 0), 3130 3131 AMDKFD_IOCTL_DEF(AMDKFD_IOC_WAIT_EVENTS, 3132 kfd_ioctl_wait_events, 0), 3133 3134 AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_REGISTER_DEPRECATED, 3135 kfd_ioctl_dbg_register, 0), 3136 3137 AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_UNREGISTER_DEPRECATED, 3138 kfd_ioctl_dbg_unregister, 0), 3139 3140 AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_ADDRESS_WATCH_DEPRECATED, 3141 kfd_ioctl_dbg_address_watch, 0), 3142 3143 AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_WAVE_CONTROL_DEPRECATED, 3144 kfd_ioctl_dbg_wave_control, 0), 3145 3146 AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_SCRATCH_BACKING_VA, 3147 kfd_ioctl_set_scratch_backing_va, 0), 3148 3149 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_TILE_CONFIG, 3150 kfd_ioctl_get_tile_config, 0), 3151 3152 AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_TRAP_HANDLER, 3153 kfd_ioctl_set_trap_handler, 0), 3154 3155 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES_NEW, 3156 kfd_ioctl_get_process_apertures_new, 0), 3157 3158 AMDKFD_IOCTL_DEF(AMDKFD_IOC_ACQUIRE_VM, 3159 kfd_ioctl_acquire_vm, 0), 3160 3161 AMDKFD_IOCTL_DEF(AMDKFD_IOC_ALLOC_MEMORY_OF_GPU, 3162 kfd_ioctl_alloc_memory_of_gpu, 0), 3163 3164 AMDKFD_IOCTL_DEF(AMDKFD_IOC_FREE_MEMORY_OF_GPU, 3165 kfd_ioctl_free_memory_of_gpu, 0), 3166 3167 AMDKFD_IOCTL_DEF(AMDKFD_IOC_MAP_MEMORY_TO_GPU, 3168 kfd_ioctl_map_memory_to_gpu, 0), 3169 3170 AMDKFD_IOCTL_DEF(AMDKFD_IOC_UNMAP_MEMORY_FROM_GPU, 3171 kfd_ioctl_unmap_memory_from_gpu, 0), 3172 3173 AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_CU_MASK, 3174 kfd_ioctl_set_cu_mask, 0), 3175 3176 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_QUEUE_WAVE_STATE, 3177 kfd_ioctl_get_queue_wave_state, 0), 3178 3179 AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_DMABUF_INFO, 3180 kfd_ioctl_get_dmabuf_info, 0), 3181 3182 AMDKFD_IOCTL_DEF(AMDKFD_IOC_IMPORT_DMABUF, 3183 kfd_ioctl_import_dmabuf, 0), 3184 3185 AMDKFD_IOCTL_DEF(AMDKFD_IOC_ALLOC_QUEUE_GWS, 3186 kfd_ioctl_alloc_queue_gws, 0), 3187 3188 AMDKFD_IOCTL_DEF(AMDKFD_IOC_SMI_EVENTS, 3189 kfd_ioctl_smi_events, 0), 3190 3191 AMDKFD_IOCTL_DEF(AMDKFD_IOC_SVM, kfd_ioctl_svm, 0), 3192 3193 AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_XNACK_MODE, 3194 kfd_ioctl_set_xnack_mode, 0), 3195 3196 AMDKFD_IOCTL_DEF(AMDKFD_IOC_CRIU_OP, 3197 kfd_ioctl_criu, KFD_IOC_FLAG_CHECKPOINT_RESTORE), 3198 3199 AMDKFD_IOCTL_DEF(AMDKFD_IOC_AVAILABLE_MEMORY, 3200 kfd_ioctl_get_available_memory, 0), 3201 3202 AMDKFD_IOCTL_DEF(AMDKFD_IOC_EXPORT_DMABUF, 3203 kfd_ioctl_export_dmabuf, 0), 3204 3205 AMDKFD_IOCTL_DEF(AMDKFD_IOC_RUNTIME_ENABLE, 3206 kfd_ioctl_runtime_enable, 0), 3207 3208 AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_TRAP, 3209 kfd_ioctl_set_debug_trap, 0), 3210 }; 3211 3212 #define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls) 3213 3214 static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) 3215 { 3216 struct kfd_process *process; 3217 amdkfd_ioctl_t *func; 3218 const struct amdkfd_ioctl_desc *ioctl = NULL; 3219 unsigned int nr = _IOC_NR(cmd); 3220 char stack_kdata[128]; 3221 char *kdata = NULL; 3222 unsigned int usize, asize; 3223 int retcode = -EINVAL; 3224 bool ptrace_attached = false; 3225 3226 if (nr >= AMDKFD_CORE_IOCTL_COUNT) 3227 goto err_i1; 3228 3229 if ((nr >= AMDKFD_COMMAND_START) && (nr < AMDKFD_COMMAND_END)) { 3230 u32 amdkfd_size; 3231 3232 ioctl = &amdkfd_ioctls[nr]; 3233 3234 amdkfd_size = _IOC_SIZE(ioctl->cmd); 3235 usize = asize = _IOC_SIZE(cmd); 3236 if (amdkfd_size > asize) 3237 asize = amdkfd_size; 3238 3239 cmd = ioctl->cmd; 3240 } else 3241 goto err_i1; 3242 3243 dev_dbg(kfd_device, "ioctl cmd 0x%x (#0x%x), arg 0x%lx\n", cmd, nr, arg); 3244 3245 /* Get the process struct from the filep. Only the process 3246 * that opened /dev/kfd can use the file descriptor. Child 3247 * processes need to create their own KFD device context. 3248 */ 3249 process = filep->private_data; 3250 3251 rcu_read_lock(); 3252 if ((ioctl->flags & KFD_IOC_FLAG_CHECKPOINT_RESTORE) && 3253 ptrace_parent(process->lead_thread) == current) 3254 ptrace_attached = true; 3255 rcu_read_unlock(); 3256 3257 if (process->lead_thread != current->group_leader 3258 && !ptrace_attached) { 3259 dev_dbg(kfd_device, "Using KFD FD in wrong process\n"); 3260 retcode = -EBADF; 3261 goto err_i1; 3262 } 3263 3264 /* Do not trust userspace, use our own definition */ 3265 func = ioctl->func; 3266 3267 if (unlikely(!func)) { 3268 dev_dbg(kfd_device, "no function\n"); 3269 retcode = -EINVAL; 3270 goto err_i1; 3271 } 3272 3273 /* 3274 * Versions of docker shipped in Ubuntu 18.xx and 20.xx do not support 3275 * CAP_CHECKPOINT_RESTORE, so we also allow access if CAP_SYS_ADMIN as CAP_SYS_ADMIN is a 3276 * more priviledged access. 3277 */ 3278 if (unlikely(ioctl->flags & KFD_IOC_FLAG_CHECKPOINT_RESTORE)) { 3279 if (!capable(CAP_CHECKPOINT_RESTORE) && 3280 !capable(CAP_SYS_ADMIN)) { 3281 retcode = -EACCES; 3282 goto err_i1; 3283 } 3284 } 3285 3286 if (cmd & (IOC_IN | IOC_OUT)) { 3287 if (asize <= sizeof(stack_kdata)) { 3288 kdata = stack_kdata; 3289 } else { 3290 kdata = kmalloc(asize, GFP_KERNEL); 3291 if (!kdata) { 3292 retcode = -ENOMEM; 3293 goto err_i1; 3294 } 3295 } 3296 if (asize > usize) 3297 memset(kdata + usize, 0, asize - usize); 3298 } 3299 3300 if (cmd & IOC_IN) { 3301 if (copy_from_user(kdata, (void __user *)arg, usize) != 0) { 3302 retcode = -EFAULT; 3303 goto err_i1; 3304 } 3305 } else if (cmd & IOC_OUT) { 3306 memset(kdata, 0, usize); 3307 } 3308 3309 retcode = func(filep, process, kdata); 3310 3311 if (cmd & IOC_OUT) 3312 if (copy_to_user((void __user *)arg, kdata, usize) != 0) 3313 retcode = -EFAULT; 3314 3315 err_i1: 3316 if (!ioctl) 3317 dev_dbg(kfd_device, "invalid ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n", 3318 task_pid_nr(current), cmd, nr); 3319 3320 if (kdata != stack_kdata) 3321 kfree(kdata); 3322 3323 if (retcode) 3324 dev_dbg(kfd_device, "ioctl cmd (#0x%x), arg 0x%lx, ret = %d\n", 3325 nr, arg, retcode); 3326 3327 return retcode; 3328 } 3329 3330 static int kfd_mmio_mmap(struct kfd_node *dev, struct kfd_process *process, 3331 struct vm_area_struct *vma) 3332 { 3333 phys_addr_t address; 3334 3335 if (vma->vm_end - vma->vm_start != PAGE_SIZE) 3336 return -EINVAL; 3337 3338 address = dev->adev->rmmio_remap.bus_addr; 3339 3340 vm_flags_set(vma, VM_IO | VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE | 3341 VM_DONTDUMP | VM_PFNMAP); 3342 3343 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 3344 3345 pr_debug("pasid 0x%x mapping mmio page\n" 3346 " target user address == 0x%08llX\n" 3347 " physical address == 0x%08llX\n" 3348 " vm_flags == 0x%04lX\n" 3349 " size == 0x%04lX\n", 3350 process->pasid, (unsigned long long) vma->vm_start, 3351 address, vma->vm_flags, PAGE_SIZE); 3352 3353 return io_remap_pfn_range(vma, 3354 vma->vm_start, 3355 address >> PAGE_SHIFT, 3356 PAGE_SIZE, 3357 vma->vm_page_prot); 3358 } 3359 3360 3361 static int kfd_mmap(struct file *filp, struct vm_area_struct *vma) 3362 { 3363 struct kfd_process *process; 3364 struct kfd_node *dev = NULL; 3365 unsigned long mmap_offset; 3366 unsigned int gpu_id; 3367 3368 process = kfd_get_process(current); 3369 if (IS_ERR(process)) 3370 return PTR_ERR(process); 3371 3372 mmap_offset = vma->vm_pgoff << PAGE_SHIFT; 3373 gpu_id = KFD_MMAP_GET_GPU_ID(mmap_offset); 3374 if (gpu_id) 3375 dev = kfd_device_by_id(gpu_id); 3376 3377 switch (mmap_offset & KFD_MMAP_TYPE_MASK) { 3378 case KFD_MMAP_TYPE_DOORBELL: 3379 if (!dev) 3380 return -ENODEV; 3381 return kfd_doorbell_mmap(dev, process, vma); 3382 3383 case KFD_MMAP_TYPE_EVENTS: 3384 return kfd_event_mmap(process, vma); 3385 3386 case KFD_MMAP_TYPE_RESERVED_MEM: 3387 if (!dev) 3388 return -ENODEV; 3389 return kfd_reserved_mem_mmap(dev, process, vma); 3390 case KFD_MMAP_TYPE_MMIO: 3391 if (!dev) 3392 return -ENODEV; 3393 return kfd_mmio_mmap(dev, process, vma); 3394 } 3395 3396 return -EFAULT; 3397 } 3398