drivers/gpu/drm/amd/amdkfd/kfd_chardev.c

   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 struct device *kfd_device;
  67 static const struct class kfd_class = {
  68         .name = kfd_dev_name,
  69 };
  70
  71 static inline struct kfd_process_device *kfd_lock_pdd_by_id(struct kfd_process *p, __u32 gpu_id)
  72 {
  73         struct kfd_process_device *pdd;
  74
  75         mutex_lock(&p->mutex);
  76         pdd = kfd_process_device_data_by_id(p, gpu_id);
  77
  78         if (pdd)
  79                 return pdd;
  80
  81         mutex_unlock(&p->mutex);
  82         return NULL;
  83 }
  84
  85 static inline void kfd_unlock_pdd(struct kfd_process_device *pdd)
  86 {
  87         mutex_unlock(&pdd->process->mutex);
  88 }
  89
  90 int kfd_chardev_init(void)
  91 {
  92         int err = 0;
  93
  94         kfd_char_dev_major = register_chrdev(0, kfd_dev_name, &kfd_fops);
  95         err = kfd_char_dev_major;
  96         if (err < 0)
  97                 goto err_register_chrdev;
  98
  99         err = class_register(&kfd_class);
 100         if (err)
 101                 goto err_class_create;
 102
 103         kfd_device = device_create(&kfd_class, NULL,
 104                                    MKDEV(kfd_char_dev_major, 0),
 105                                    NULL, kfd_dev_name);
 106         err = PTR_ERR(kfd_device);
 107         if (IS_ERR(kfd_device))
 108                 goto err_device_create;
 109
 110         return 0;
 111
 112 err_device_create:
 113         class_unregister(&kfd_class);
 114 err_class_create:
 115         unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
 116 err_register_chrdev:
 117         return err;
 118 }
 119
 120 void kfd_chardev_exit(void)
 121 {
 122         device_destroy(&kfd_class, MKDEV(kfd_char_dev_major, 0));
 123         class_unregister(&kfd_class);
 124         unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
 125         kfd_device = NULL;
 126 }
 127
 128
 129 static int kfd_open(struct inode *inode, struct file *filep)
 130 {
 131         struct kfd_process *process;
 132         bool is_32bit_user_mode;
 133
 134         if (iminor(inode) != 0)
 135                 return -ENODEV;
 136
 137         is_32bit_user_mode = in_compat_syscall();
 138
 139         if (is_32bit_user_mode) {
 140                 dev_warn(kfd_device,
 141                         "Process %d (32-bit) failed to open /dev/kfd\n"
 142                         "32-bit processes are not supported by amdkfd\n",
 143                         current->pid);
 144                 return -EPERM;
 145         }
 146
 147         process = kfd_create_process(current);
 148         if (IS_ERR(process))
 149                 return PTR_ERR(process);
 150
 151         if (kfd_process_init_cwsr_apu(process, filep)) {
 152                 kfd_unref_process(process);
 153                 return -EFAULT;
 154         }
 155
 156         /* filep now owns the reference returned by kfd_create_process */
 157         filep->private_data = process;
 158
 159         dev_dbg(kfd_device, "process %d opened, compat mode (32 bit) - %d\n",
 160                 process->pasid, process->is_32bit_user_mode);
 161
 162         return 0;
 163 }
 164
 165 static int kfd_release(struct inode *inode, struct file *filep)
 166 {
 167         struct kfd_process *process = filep->private_data;
 168
 169         if (process)
 170                 kfd_unref_process(process);
 171
 172         return 0;
 173 }
 174
 175 static int kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
 176                                         void *data)
 177 {
 178         struct kfd_ioctl_get_version_args *args = data;
 179
 180         args->major_version = KFD_IOCTL_MAJOR_VERSION;
 181         args->minor_version = KFD_IOCTL_MINOR_VERSION;
 182
 183         return 0;
 184 }
 185
 186 static int set_queue_properties_from_user(struct queue_properties *q_properties,
 187                                 struct kfd_ioctl_create_queue_args *args)
 188 {
 189         /*
 190          * Repurpose queue percentage to accommodate new features:
 191          * bit 0-7: queue percentage
 192          * bit 8-15: pm4_target_xcc
 193          */
 194         if ((args->queue_percentage & 0xFF) > KFD_MAX_QUEUE_PERCENTAGE) {
 195                 pr_err("Queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
 196                 return -EINVAL;
 197         }
 198
 199         if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
 200                 pr_err("Queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
 201                 return -EINVAL;
 202         }
 203
 204         if ((args->ring_base_address) &&
 205                 (!access_ok((const void __user *) args->ring_base_address,
 206                         sizeof(uint64_t)))) {
 207                 pr_err("Can't access ring base address\n");
 208                 return -EFAULT;
 209         }
 210
 211         if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
 212                 pr_err("Ring size must be a power of 2 or 0\n");
 213                 return -EINVAL;
 214         }
 215
 216         if (!access_ok((const void __user *) args->read_pointer_address,
 217                         sizeof(uint32_t))) {
 218                 pr_err("Can't access read pointer\n");
 219                 return -EFAULT;
 220         }
 221
 222         if (!access_ok((const void __user *) args->write_pointer_address,
 223                         sizeof(uint32_t))) {
 224                 pr_err("Can't access write pointer\n");
 225                 return -EFAULT;
 226         }
 227
 228         if (args->eop_buffer_address &&
 229                 !access_ok((const void __user *) args->eop_buffer_address,
 230                         sizeof(uint32_t))) {
 231                 pr_debug("Can't access eop buffer");
 232                 return -EFAULT;
 233         }
 234
 235         if (args->ctx_save_restore_address &&
 236                 !access_ok((const void __user *) args->ctx_save_restore_address,
 237                         sizeof(uint32_t))) {
 238                 pr_debug("Can't access ctx save restore buffer");
 239                 return -EFAULT;
 240         }
 241
 242         q_properties->is_interop = false;
 243         q_properties->is_gws = false;
 244         q_properties->queue_percent = args->queue_percentage & 0xFF;
 245         /* bit 8-15 are repurposed to be PM4 target XCC */
 246         q_properties->pm4_target_xcc = (args->queue_percentage >> 8) & 0xFF;
 247         q_properties->priority = args->queue_priority;
 248         q_properties->queue_address = args->ring_base_address;
 249         q_properties->queue_size = args->ring_size;
 250         q_properties->read_ptr = (uint32_t *) args->read_pointer_address;
 251         q_properties->write_ptr = (uint32_t *) args->write_pointer_address;
 252         q_properties->eop_ring_buffer_address = args->eop_buffer_address;
 253         q_properties->eop_ring_buffer_size = args->eop_buffer_size;
 254         q_properties->ctx_save_restore_area_address =
 255                         args->ctx_save_restore_address;
 256         q_properties->ctx_save_restore_area_size = args->ctx_save_restore_size;
 257         q_properties->ctl_stack_size = args->ctl_stack_size;
 258         if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE ||
 259                 args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
 260                 q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
 261         else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA)
 262                 q_properties->type = KFD_QUEUE_TYPE_SDMA;
 263         else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA_XGMI)
 264                 q_properties->type = KFD_QUEUE_TYPE_SDMA_XGMI;
 265         else
 266                 return -ENOTSUPP;
 267
 268         if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
 269                 q_properties->format = KFD_QUEUE_FORMAT_AQL;
 270         else
 271                 q_properties->format = KFD_QUEUE_FORMAT_PM4;
 272
 273         pr_debug("Queue Percentage: %d, %d\n",
 274                         q_properties->queue_percent, args->queue_percentage);
 275
 276         pr_debug("Queue Priority: %d, %d\n",
 277                         q_properties->priority, args->queue_priority);
 278
 279         pr_debug("Queue Address: 0x%llX, 0x%llX\n",
 280                         q_properties->queue_address, args->ring_base_address);
 281
 282         pr_debug("Queue Size: 0x%llX, %u\n",
 283                         q_properties->queue_size, args->ring_size);
 284
 285         pr_debug("Queue r/w Pointers: %px, %px\n",
 286                         q_properties->read_ptr,
 287                         q_properties->write_ptr);
 288
 289         pr_debug("Queue Format: %d\n", q_properties->format);
 290
 291         pr_debug("Queue EOP: 0x%llX\n", q_properties->eop_ring_buffer_address);
 292
 293         pr_debug("Queue CTX save area: 0x%llX\n",
 294                         q_properties->ctx_save_restore_area_address);
 295
 296         return 0;
 297 }
 298
 299 static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
 300                                         void *data)
 301 {
 302         struct kfd_ioctl_create_queue_args *args = data;
 303         struct kfd_node *dev;
 304         int err = 0;
 305         unsigned int queue_id;
 306         struct kfd_process_device *pdd;
 307         struct queue_properties q_properties;
 308         uint32_t doorbell_offset_in_process = 0;
 309         struct amdgpu_bo *wptr_bo = NULL;
 310
 311         memset(&q_properties, 0, sizeof(struct queue_properties));
 312
 313         pr_debug("Creating queue ioctl\n");
 314
 315         err = set_queue_properties_from_user(&q_properties, args);
 316         if (err)
 317                 return err;
 318
 319         pr_debug("Looking for gpu id 0x%x\n", args->gpu_id);
 320
 321         mutex_lock(&p->mutex);
 322
 323         pdd = kfd_process_device_data_by_id(p, args->gpu_id);
 324         if (!pdd) {
 325                 pr_debug("Could not find gpu id 0x%x\n", args->gpu_id);
 326                 err = -EINVAL;
 327                 goto err_pdd;
 328         }
 329         dev = pdd->dev;
 330
 331         pdd = kfd_bind_process_to_device(dev, p);
 332         if (IS_ERR(pdd)) {
 333                 err = -ESRCH;
 334                 goto err_bind_process;
 335         }
 336
 337         if (!pdd->qpd.proc_doorbells) {
 338                 err = kfd_alloc_process_doorbells(dev->kfd, pdd);
 339                 if (err) {
 340                         pr_debug("failed to allocate process doorbells\n");
 341                         goto err_bind_process;
 342                 }
 343         }
 344
 345         /* Starting with GFX11, wptr BOs must be mapped to GART for MES to determine work
 346          * on unmapped queues for usermode queue oversubscription (no aggregated doorbell)
 347          */
 348         if (dev->kfd->shared_resources.enable_mes &&
 349                         ((dev->adev->mes.sched_version & AMDGPU_MES_API_VERSION_MASK)
 350                         >> AMDGPU_MES_API_VERSION_SHIFT) >= 2) {
 351                 struct amdgpu_bo_va_mapping *wptr_mapping;
 352                 struct amdgpu_vm *wptr_vm;
 353
 354                 wptr_vm = drm_priv_to_vm(pdd->drm_priv);
 355                 err = amdgpu_bo_reserve(wptr_vm->root.bo, false);
 356                 if (err)
 357                         goto err_wptr_map_gart;
 358
 359                 wptr_mapping = amdgpu_vm_bo_lookup_mapping(
 360                                 wptr_vm, args->write_pointer_address >> PAGE_SHIFT);
 361                 amdgpu_bo_unreserve(wptr_vm->root.bo);
 362                 if (!wptr_mapping) {
 363                         pr_err("Failed to lookup wptr bo\n");
 364                         err = -EINVAL;
 365                         goto err_wptr_map_gart;
 366                 }
 367
 368                 wptr_bo = wptr_mapping->bo_va->base.bo;
 369                 if (wptr_bo->tbo.base.size > PAGE_SIZE) {
 370                         pr_err("Requested GART mapping for wptr bo larger than one page\n");
 371                         err = -EINVAL;
 372                         goto err_wptr_map_gart;
 373                 }
 374                 if (dev->adev != amdgpu_ttm_adev(wptr_bo->tbo.bdev)) {
 375                         pr_err("Queue memory allocated to wrong device\n");
 376                         err = -EINVAL;
 377                         goto err_wptr_map_gart;
 378                 }
 379
 380                 err = amdgpu_amdkfd_map_gtt_bo_to_gart(wptr_bo);
 381                 if (err) {
 382                         pr_err("Failed to map wptr bo to GART\n");
 383                         goto err_wptr_map_gart;
 384                 }
 385         }
 386
 387         pr_debug("Creating queue for PASID 0x%x on gpu 0x%x\n",
 388                         p->pasid,
 389                         dev->id);
 390
 391         err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, &queue_id, wptr_bo,
 392                         NULL, NULL, NULL, &doorbell_offset_in_process);
 393         if (err != 0)
 394                 goto err_create_queue;
 395
 396         args->queue_id = queue_id;
 397
 398
 399         /* Return gpu_id as doorbell offset for mmap usage */
 400         args->doorbell_offset = KFD_MMAP_TYPE_DOORBELL;
 401         args->doorbell_offset |= KFD_MMAP_GPU_ID(args->gpu_id);
 402         if (KFD_IS_SOC15(dev))
 403                 /* On SOC15 ASICs, include the doorbell offset within the
 404                  * process doorbell frame, which is 2 pages.
 405                  */
 406                 args->doorbell_offset |= doorbell_offset_in_process;
 407
 408         mutex_unlock(&p->mutex);
 409
 410         pr_debug("Queue id %d was created successfully\n", args->queue_id);
 411
 412         pr_debug("Ring buffer address == 0x%016llX\n",
 413                         args->ring_base_address);
 414
 415         pr_debug("Read ptr address    == 0x%016llX\n",
 416                         args->read_pointer_address);
 417
 418         pr_debug("Write ptr address   == 0x%016llX\n",
 419                         args->write_pointer_address);
 420
 421         kfd_dbg_ev_raise(KFD_EC_MASK(EC_QUEUE_NEW), p, dev, queue_id, false, NULL, 0);
 422         return 0;
 423
 424 err_create_queue:
 425         if (wptr_bo)
 426                 amdgpu_amdkfd_free_gtt_mem(dev->adev, wptr_bo);
 427 err_wptr_map_gart:
 428 err_bind_process:
 429 err_pdd:
 430         mutex_unlock(&p->mutex);
 431         return err;
 432 }
 433
 434 static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p,
 435                                         void *data)
 436 {
 437         int retval;
 438         struct kfd_ioctl_destroy_queue_args *args = data;
 439
 440         pr_debug("Destroying queue id %d for pasid 0x%x\n",
 441                                 args->queue_id,
 442                                 p->pasid);
 443
 444         mutex_lock(&p->mutex);
 445
 446         retval = pqm_destroy_queue(&p->pqm, args->queue_id);
 447
 448         mutex_unlock(&p->mutex);
 449         return retval;
 450 }
 451
 452 static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p,
 453                                         void *data)
 454 {
 455         int retval;
 456         struct kfd_ioctl_update_queue_args *args = data;
 457         struct queue_properties properties;
 458
 459         /*
 460          * Repurpose queue percentage to accommodate new features:
 461          * bit 0-7: queue percentage
 462          * bit 8-15: pm4_target_xcc
 463          */
 464         if ((args->queue_percentage & 0xFF) > KFD_MAX_QUEUE_PERCENTAGE) {
 465                 pr_err("Queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
 466                 return -EINVAL;
 467         }
 468
 469         if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
 470                 pr_err("Queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
 471                 return -EINVAL;
 472         }
 473
 474         if ((args->ring_base_address) &&
 475                 (!access_ok((const void __user *) args->ring_base_address,
 476                         sizeof(uint64_t)))) {
 477                 pr_err("Can't access ring base address\n");
 478                 return -EFAULT;
 479         }
 480
 481         if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
 482                 pr_err("Ring size must be a power of 2 or 0\n");
 483                 return -EINVAL;
 484         }
 485
 486         properties.queue_address = args->ring_base_address;
 487         properties.queue_size = args->ring_size;
 488         properties.queue_percent = args->queue_percentage & 0xFF;
 489         /* bit 8-15 are repurposed to be PM4 target XCC */
 490         properties.pm4_target_xcc = (args->queue_percentage >> 8) & 0xFF;
 491         properties.priority = args->queue_priority;
 492
 493         pr_debug("Updating queue id %d for pasid 0x%x\n",
 494                         args->queue_id, p->pasid);
 495
 496         mutex_lock(&p->mutex);
 497
 498         retval = pqm_update_queue_properties(&p->pqm, args->queue_id, &properties);
 499
 500         mutex_unlock(&p->mutex);
 501
 502         return retval;
 503 }
 504
 505 static int kfd_ioctl_set_cu_mask(struct file *filp, struct kfd_process *p,
 506                                         void *data)
 507 {
 508         int retval;
 509         const int max_num_cus = 1024;
 510         struct kfd_ioctl_set_cu_mask_args *args = data;
 511         struct mqd_update_info minfo = {0};
 512         uint32_t __user *cu_mask_ptr = (uint32_t __user *)args->cu_mask_ptr;
 513         size_t cu_mask_size = sizeof(uint32_t) * (args->num_cu_mask / 32);
 514
 515         if ((args->num_cu_mask % 32) != 0) {
 516                 pr_debug("num_cu_mask 0x%x must be a multiple of 32",
 517                                 args->num_cu_mask);
 518                 return -EINVAL;
 519         }
 520
 521         minfo.cu_mask.count = args->num_cu_mask;
 522         if (minfo.cu_mask.count == 0) {
 523                 pr_debug("CU mask cannot be 0");
 524                 return -EINVAL;
 525         }
 526
 527         /* To prevent an unreasonably large CU mask size, set an arbitrary
 528          * limit of max_num_cus bits.  We can then just drop any CU mask bits
 529          * past max_num_cus bits and just use the first max_num_cus bits.
 530          */
 531         if (minfo.cu_mask.count > max_num_cus) {
 532                 pr_debug("CU mask cannot be greater than 1024 bits");
 533                 minfo.cu_mask.count = max_num_cus;
 534                 cu_mask_size = sizeof(uint32_t) * (max_num_cus/32);
 535         }
 536
 537         minfo.cu_mask.ptr = kzalloc(cu_mask_size, GFP_KERNEL);
 538         if (!minfo.cu_mask.ptr)
 539                 return -ENOMEM;
 540
 541         retval = copy_from_user(minfo.cu_mask.ptr, cu_mask_ptr, cu_mask_size);
 542         if (retval) {
 543                 pr_debug("Could not copy CU mask from userspace");
 544                 retval = -EFAULT;
 545                 goto out;
 546         }
 547
 548         mutex_lock(&p->mutex);
 549
 550         retval = pqm_update_mqd(&p->pqm, args->queue_id, &minfo);
 551
 552         mutex_unlock(&p->mutex);
 553
 554 out:
 555         kfree(minfo.cu_mask.ptr);
 556         return retval;
 557 }
 558
 559 static int kfd_ioctl_get_queue_wave_state(struct file *filep,
 560                                           struct kfd_process *p, void *data)
 561 {
 562         struct kfd_ioctl_get_queue_wave_state_args *args = data;
 563         int r;
 564
 565         mutex_lock(&p->mutex);
 566
 567         r = pqm_get_wave_state(&p->pqm, args->queue_id,
 568                                (void __user *)args->ctl_stack_address,
 569                                &args->ctl_stack_used_size,
 570                                &args->save_area_used_size);
 571
 572         mutex_unlock(&p->mutex);
 573
 574         return r;
 575 }
 576
 577 static int kfd_ioctl_set_memory_policy(struct file *filep,
 578                                         struct kfd_process *p, void *data)
 579 {
 580         struct kfd_ioctl_set_memory_policy_args *args = data;
 581         int err = 0;
 582         struct kfd_process_device *pdd;
 583         enum cache_policy default_policy, alternate_policy;
 584
 585         if (args->default_policy != KFD_IOC_CACHE_POLICY_COHERENT
 586             && args->default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
 587                 return -EINVAL;
 588         }
 589
 590         if (args->alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
 591             && args->alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
 592                 return -EINVAL;
 593         }
 594
 595         mutex_lock(&p->mutex);
 596         pdd = kfd_process_device_data_by_id(p, args->gpu_id);
 597         if (!pdd) {
 598                 pr_debug("Could not find gpu id 0x%x\n", args->gpu_id);
 599                 err = -EINVAL;
 600                 goto err_pdd;
 601         }
 602
 603         pdd = kfd_bind_process_to_device(pdd->dev, p);
 604         if (IS_ERR(pdd)) {
 605                 err = -ESRCH;
 606                 goto out;
 607         }
 608
 609         default_policy = (args->default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
 610                          ? cache_policy_coherent : cache_policy_noncoherent;
 611
 612         alternate_policy =
 613                 (args->alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
 614                    ? cache_policy_coherent : cache_policy_noncoherent;
 615
 616         if (!pdd->dev->dqm->ops.set_cache_memory_policy(pdd->dev->dqm,
 617                                 &pdd->qpd,
 618                                 default_policy,
 619                                 alternate_policy,
 620                                 (void __user *)args->alternate_aperture_base,
 621                                 args->alternate_aperture_size))
 622                 err = -EINVAL;
 623
 624 out:
 625 err_pdd:
 626         mutex_unlock(&p->mutex);
 627
 628         return err;
 629 }
 630
 631 static int kfd_ioctl_set_trap_handler(struct file *filep,
 632                                         struct kfd_process *p, void *data)
 633 {
 634         struct kfd_ioctl_set_trap_handler_args *args = data;
 635         int err = 0;
 636         struct kfd_process_device *pdd;
 637
 638         mutex_lock(&p->mutex);
 639
 640         pdd = kfd_process_device_data_by_id(p, args->gpu_id);
 641         if (!pdd) {
 642                 err = -EINVAL;
 643                 goto err_pdd;
 644         }
 645
 646         pdd = kfd_bind_process_to_device(pdd->dev, p);
 647         if (IS_ERR(pdd)) {
 648                 err = -ESRCH;
 649                 goto out;
 650         }
 651
 652         kfd_process_set_trap_handler(&pdd->qpd, args->tba_addr, args->tma_addr);
 653
 654 out:
 655 err_pdd:
 656         mutex_unlock(&p->mutex);
 657
 658         return err;
 659 }
 660
 661 static int kfd_ioctl_dbg_register(struct file *filep,
 662                                 struct kfd_process *p, void *data)
 663 {
 664         return -EPERM;
 665 }
 666
 667 static int kfd_ioctl_dbg_unregister(struct file *filep,
 668                                 struct kfd_process *p, void *data)
 669 {
 670         return -EPERM;
 671 }
 672
 673 static int kfd_ioctl_dbg_address_watch(struct file *filep,
 674                                         struct kfd_process *p, void *data)
 675 {
 676         return -EPERM;
 677 }
 678
 679 /* Parse and generate fixed size data structure for wave control */
 680 static int kfd_ioctl_dbg_wave_control(struct file *filep,
 681                                         struct kfd_process *p, void *data)
 682 {
 683         return -EPERM;
 684 }
 685
 686 static int kfd_ioctl_get_clock_counters(struct file *filep,
 687                                 struct kfd_process *p, void *data)
 688 {
 689         struct kfd_ioctl_get_clock_counters_args *args = data;
 690         struct kfd_process_device *pdd;
 691
 692         mutex_lock(&p->mutex);
 693         pdd = kfd_process_device_data_by_id(p, args->gpu_id);
 694         mutex_unlock(&p->mutex);
 695         if (pdd)
 696                 /* Reading GPU clock counter from KGD */
 697                 args->gpu_clock_counter = amdgpu_amdkfd_get_gpu_clock_counter(pdd->dev->adev);
 698         else
 699                 /* Node without GPU resource */
 700                 args->gpu_clock_counter = 0;
 701
 702         /* No access to rdtsc. Using raw monotonic time */
 703         args->cpu_clock_counter = ktime_get_raw_ns();
 704         args->system_clock_counter = ktime_get_boottime_ns();
 705
 706         /* Since the counter is in nano-seconds we use 1GHz frequency */
 707         args->system_clock_freq = 1000000000;
 708
 709         return 0;
 710 }
 711
 712
 713 static int kfd_ioctl_get_process_apertures(struct file *filp,
 714                                 struct kfd_process *p, void *data)
 715 {
 716         struct kfd_ioctl_get_process_apertures_args *args = data;
 717         struct kfd_process_device_apertures *pAperture;
 718         int i;
 719
 720         dev_dbg(kfd_device, "get apertures for PASID 0x%x", p->pasid);
 721
 722         args->num_of_nodes = 0;
 723
 724         mutex_lock(&p->mutex);
 725         /* Run over all pdd of the process */
 726         for (i = 0; i < p->n_pdds; i++) {
 727                 struct kfd_process_device *pdd = p->pdds[i];
 728
 729                 pAperture =
 730                         &args->process_apertures[args->num_of_nodes];
 731                 pAperture->gpu_id = pdd->dev->id;
 732                 pAperture->lds_base = pdd->lds_base;
 733                 pAperture->lds_limit = pdd->lds_limit;
 734                 pAperture->gpuvm_base = pdd->gpuvm_base;
 735                 pAperture->gpuvm_limit = pdd->gpuvm_limit;
 736                 pAperture->scratch_base = pdd->scratch_base;
 737                 pAperture->scratch_limit = pdd->scratch_limit;
 738
 739                 dev_dbg(kfd_device,
 740                         "node id %u\n", args->num_of_nodes);
 741                 dev_dbg(kfd_device,
 742                         "gpu id %u\n", pdd->dev->id);
 743                 dev_dbg(kfd_device,
 744                         "lds_base %llX\n", pdd->lds_base);
 745                 dev_dbg(kfd_device,
 746                         "lds_limit %llX\n", pdd->lds_limit);
 747                 dev_dbg(kfd_device,
 748                         "gpuvm_base %llX\n", pdd->gpuvm_base);
 749                 dev_dbg(kfd_device,
 750                         "gpuvm_limit %llX\n", pdd->gpuvm_limit);
 751                 dev_dbg(kfd_device,
 752                         "scratch_base %llX\n", pdd->scratch_base);
 753                 dev_dbg(kfd_device,
 754                         "scratch_limit %llX\n", pdd->scratch_limit);
 755
 756                 if (++args->num_of_nodes >= NUM_OF_SUPPORTED_GPUS)
 757                         break;
 758         }
 759         mutex_unlock(&p->mutex);
 760
 761         return 0;
 762 }
 763
 764 static int kfd_ioctl_get_process_apertures_new(struct file *filp,
 765                                 struct kfd_process *p, void *data)
 766 {
 767         struct kfd_ioctl_get_process_apertures_new_args *args = data;
 768         struct kfd_process_device_apertures *pa;
 769         int ret;
 770         int i;
 771
 772         dev_dbg(kfd_device, "get apertures for PASID 0x%x", p->pasid);
 773
 774         if (args->num_of_nodes == 0) {
 775                 /* Return number of nodes, so that user space can alloacate
 776                  * sufficient memory
 777                  */
 778                 mutex_lock(&p->mutex);
 779                 args->num_of_nodes = p->n_pdds;
 780                 goto out_unlock;
 781         }
 782
 783         /* Fill in process-aperture information for all available
 784          * nodes, but not more than args->num_of_nodes as that is
 785          * the amount of memory allocated by user
 786          */
 787         pa = kcalloc(args->num_of_nodes, sizeof(struct kfd_process_device_apertures),
 788                      GFP_KERNEL);
 789         if (!pa)
 790                 return -ENOMEM;
 791
 792         mutex_lock(&p->mutex);
 793
 794         if (!p->n_pdds) {
 795                 args->num_of_nodes = 0;
 796                 kfree(pa);
 797                 goto out_unlock;
 798         }
 799
 800         /* Run over all pdd of the process */
 801         for (i = 0; i < min(p->n_pdds, args->num_of_nodes); i++) {
 802                 struct kfd_process_device *pdd = p->pdds[i];
 803
 804                 pa[i].gpu_id = pdd->dev->id;
 805                 pa[i].lds_base = pdd->lds_base;
 806                 pa[i].lds_limit = pdd->lds_limit;
 807                 pa[i].gpuvm_base = pdd->gpuvm_base;
 808                 pa[i].gpuvm_limit = pdd->gpuvm_limit;
 809                 pa[i].scratch_base = pdd->scratch_base;
 810                 pa[i].scratch_limit = pdd->scratch_limit;
 811
 812                 dev_dbg(kfd_device,
 813                         "gpu id %u\n", pdd->dev->id);
 814                 dev_dbg(kfd_device,
 815                         "lds_base %llX\n", pdd->lds_base);
 816                 dev_dbg(kfd_device,
 817                         "lds_limit %llX\n", pdd->lds_limit);
 818                 dev_dbg(kfd_device,
 819                         "gpuvm_base %llX\n", pdd->gpuvm_base);
 820                 dev_dbg(kfd_device,
 821                         "gpuvm_limit %llX\n", pdd->gpuvm_limit);
 822                 dev_dbg(kfd_device,
 823                         "scratch_base %llX\n", pdd->scratch_base);
 824                 dev_dbg(kfd_device,
 825                         "scratch_limit %llX\n", pdd->scratch_limit);
 826         }
 827         mutex_unlock(&p->mutex);
 828
 829         args->num_of_nodes = i;
 830         ret = copy_to_user(
 831                         (void __user *)args->kfd_process_device_apertures_ptr,
 832                         pa,
 833                         (i * sizeof(struct kfd_process_device_apertures)));
 834         kfree(pa);
 835         return ret ? -EFAULT : 0;
 836
 837 out_unlock:
 838         mutex_unlock(&p->mutex);
 839         return 0;
 840 }
 841
 842 static int kfd_ioctl_create_event(struct file *filp, struct kfd_process *p,
 843                                         void *data)
 844 {
 845         struct kfd_ioctl_create_event_args *args = data;
 846         int err;
 847
 848         /* For dGPUs the event page is allocated in user mode. The
 849          * handle is passed to KFD with the first call to this IOCTL
 850          * through the event_page_offset field.
 851          */
 852         if (args->event_page_offset) {
 853                 mutex_lock(&p->mutex);
 854                 err = kfd_kmap_event_page(p, args->event_page_offset);
 855                 mutex_unlock(&p->mutex);
 856                 if (err)
 857                         return err;
 858         }
 859
 860         err = kfd_event_create(filp, p, args->event_type,
 861                                 args->auto_reset != 0, args->node_id,
 862                                 &args->event_id, &args->event_trigger_data,
 863                                 &args->event_page_offset,
 864                                 &args->event_slot_index);
 865
 866         pr_debug("Created event (id:0x%08x) (%s)\n", args->event_id, __func__);
 867         return err;
 868 }
 869
 870 static int kfd_ioctl_destroy_event(struct file *filp, struct kfd_process *p,
 871                                         void *data)
 872 {
 873         struct kfd_ioctl_destroy_event_args *args = data;
 874
 875         return kfd_event_destroy(p, args->event_id);
 876 }
 877
 878 static int kfd_ioctl_set_event(struct file *filp, struct kfd_process *p,
 879                                 void *data)
 880 {
 881         struct kfd_ioctl_set_event_args *args = data;
 882
 883         return kfd_set_event(p, args->event_id);
 884 }
 885
 886 static int kfd_ioctl_reset_event(struct file *filp, struct kfd_process *p,
 887                                 void *data)
 888 {
 889         struct kfd_ioctl_reset_event_args *args = data;
 890
 891         return kfd_reset_event(p, args->event_id);
 892 }
 893
 894 static int kfd_ioctl_wait_events(struct file *filp, struct kfd_process *p,
 895                                 void *data)
 896 {
 897         struct kfd_ioctl_wait_events_args *args = data;
 898
 899         return kfd_wait_on_events(p, args->num_events,
 900                         (void __user *)args->events_ptr,
 901                         (args->wait_for_all != 0),
 902                         &args->timeout, &args->wait_result);
 903 }
 904 static int kfd_ioctl_set_scratch_backing_va(struct file *filep,
 905                                         struct kfd_process *p, void *data)
 906 {
 907         struct kfd_ioctl_set_scratch_backing_va_args *args = data;
 908         struct kfd_process_device *pdd;
 909         struct kfd_node *dev;
 910         long err;
 911
 912         mutex_lock(&p->mutex);
 913         pdd = kfd_process_device_data_by_id(p, args->gpu_id);
 914         if (!pdd) {
 915                 err = -EINVAL;
 916                 goto err_pdd;
 917         }
 918         dev = pdd->dev;
 919
 920         pdd = kfd_bind_process_to_device(dev, p);
 921         if (IS_ERR(pdd)) {
 922                 err = PTR_ERR(pdd);
 923                 goto bind_process_to_device_fail;
 924         }
 925
 926         pdd->qpd.sh_hidden_private_base = args->va_addr;
 927
 928         mutex_unlock(&p->mutex);
 929
 930         if (dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS &&
 931             pdd->qpd.vmid != 0 && dev->kfd2kgd->set_scratch_backing_va)
 932                 dev->kfd2kgd->set_scratch_backing_va(
 933                         dev->adev, args->va_addr, pdd->qpd.vmid);
 934
 935         return 0;
 936
 937 bind_process_to_device_fail:
 938 err_pdd:
 939         mutex_unlock(&p->mutex);
 940         return err;
 941 }
 942
 943 static int kfd_ioctl_get_tile_config(struct file *filep,
 944                 struct kfd_process *p, void *data)
 945 {
 946         struct kfd_ioctl_get_tile_config_args *args = data;
 947         struct kfd_process_device *pdd;
 948         struct tile_config config;
 949         int err = 0;
 950
 951         mutex_lock(&p->mutex);
 952         pdd = kfd_process_device_data_by_id(p, args->gpu_id);
 953         mutex_unlock(&p->mutex);
 954         if (!pdd)
 955                 return -EINVAL;
 956
 957         amdgpu_amdkfd_get_tile_config(pdd->dev->adev, &config);
 958
 959         args->gb_addr_config = config.gb_addr_config;
 960         args->num_banks = config.num_banks;
 961         args->num_ranks = config.num_ranks;
 962
 963         if (args->num_tile_configs > config.num_tile_configs)
 964                 args->num_tile_configs = config.num_tile_configs;
 965         err = copy_to_user((void __user *)args->tile_config_ptr,
 966                         config.tile_config_ptr,
 967                         args->num_tile_configs * sizeof(uint32_t));
 968         if (err) {
 969                 args->num_tile_configs = 0;
 970                 return -EFAULT;
 971         }
 972
 973         if (args->num_macro_tile_configs > config.num_macro_tile_configs)
 974                 args->num_macro_tile_configs =
 975                                 config.num_macro_tile_configs;
 976         err = copy_to_user((void __user *)args->macro_tile_config_ptr,
 977                         config.macro_tile_config_ptr,
 978                         args->num_macro_tile_configs * sizeof(uint32_t));
 979         if (err) {
 980                 args->num_macro_tile_configs = 0;
 981                 return -EFAULT;
 982         }
 983
 984         return 0;
 985 }
 986
 987 static int kfd_ioctl_acquire_vm(struct file *filep, struct kfd_process *p,
 988                                 void *data)
 989 {
 990         struct kfd_ioctl_acquire_vm_args *args = data;
 991         struct kfd_process_device *pdd;
 992         struct file *drm_file;
 993         int ret;
 994
 995         drm_file = fget(args->drm_fd);
 996         if (!drm_file)
 997                 return -EINVAL;
 998
 999         mutex_lock(&p->mutex);
1000         pdd = kfd_process_device_data_by_id(p, args->gpu_id);
1001         if (!pdd) {
1002                 ret = -EINVAL;
1003                 goto err_pdd;
1004         }
1005
1006         if (pdd->drm_file) {
1007                 ret = pdd->drm_file == drm_file ? 0 : -EBUSY;
1008                 goto err_drm_file;
1009         }
1010
1011         ret = kfd_process_device_init_vm(pdd, drm_file);
1012         if (ret)
1013                 goto err_unlock;
1014
1015         /* On success, the PDD keeps the drm_file reference */
1016         mutex_unlock(&p->mutex);
1017
1018         return 0;
1019
1020 err_unlock:
1021 err_pdd:
1022 err_drm_file:
1023         mutex_unlock(&p->mutex);
1024         fput(drm_file);
1025         return ret;
1026 }
1027
1028 bool kfd_dev_is_large_bar(struct kfd_node *dev)
1029 {
1030         if (dev->kfd->adev->debug_largebar) {
1031                 pr_debug("Simulate large-bar allocation on non large-bar machine\n");
1032                 return true;
1033         }
1034
1035         if (dev->local_mem_info.local_mem_size_private == 0 &&
1036             dev->local_mem_info.local_mem_size_public > 0)
1037                 return true;
1038
1039         if (dev->local_mem_info.local_mem_size_public == 0 &&
1040             dev->kfd->adev->gmc.is_app_apu) {
1041                 pr_debug("APP APU, Consider like a large bar system\n");
1042                 return true;
1043         }
1044
1045         return false;
1046 }
1047
1048 static int kfd_ioctl_get_available_memory(struct file *filep,
1049                                           struct kfd_process *p, void *data)
1050 {
1051         struct kfd_ioctl_get_available_memory_args *args = data;
1052         struct kfd_process_device *pdd = kfd_lock_pdd_by_id(p, args->gpu_id);
1053
1054         if (!pdd)
1055                 return -EINVAL;
1056         args->available = amdgpu_amdkfd_get_available_memory(pdd->dev->adev,
1057                                                         pdd->dev->node_id);
1058         kfd_unlock_pdd(pdd);
1059         return 0;
1060 }
1061
1062 static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep,
1063                                         struct kfd_process *p, void *data)
1064 {
1065         struct kfd_ioctl_alloc_memory_of_gpu_args *args = data;
1066         struct kfd_process_device *pdd;
1067         void *mem;
1068         struct kfd_node *dev;
1069         int idr_handle;
1070         long err;
1071         uint64_t offset = args->mmap_offset;
1072         uint32_t flags = args->flags;
1073
1074         if (args->size == 0)
1075                 return -EINVAL;
1076
1077 #if IS_ENABLED(CONFIG_HSA_AMD_SVM)
1078         /* Flush pending deferred work to avoid racing with deferred actions
1079          * from previous memory map changes (e.g. munmap).
1080          */
1081         svm_range_list_lock_and_flush_work(&p->svms, current->mm);
1082         mutex_lock(&p->svms.lock);
1083         mmap_write_unlock(current->mm);
1084         if (interval_tree_iter_first(&p->svms.objects,
1085                                      args->va_addr >> PAGE_SHIFT,
1086                                      (args->va_addr + args->size - 1) >> PAGE_SHIFT)) {
1087                 pr_err("Address: 0x%llx already allocated by SVM\n",
1088                         args->va_addr);
1089                 mutex_unlock(&p->svms.lock);
1090                 return -EADDRINUSE;
1091         }
1092
1093         /* When register user buffer check if it has been registered by svm by
1094          * buffer cpu virtual address.
1095          */
1096         if ((flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) &&
1097             interval_tree_iter_first(&p->svms.objects,
1098                                      args->mmap_offset >> PAGE_SHIFT,
1099                                      (args->mmap_offset  + args->size - 1) >> PAGE_SHIFT)) {
1100                 pr_err("User Buffer Address: 0x%llx already allocated by SVM\n",
1101                         args->mmap_offset);
1102                 mutex_unlock(&p->svms.lock);
1103                 return -EADDRINUSE;
1104         }
1105
1106         mutex_unlock(&p->svms.lock);
1107 #endif
1108         mutex_lock(&p->mutex);
1109         pdd = kfd_process_device_data_by_id(p, args->gpu_id);
1110         if (!pdd) {
1111                 err = -EINVAL;
1112                 goto err_pdd;
1113         }
1114
1115         dev = pdd->dev;
1116
1117         if ((flags & KFD_IOC_ALLOC_MEM_FLAGS_PUBLIC) &&
1118                 (flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) &&
1119                 !kfd_dev_is_large_bar(dev)) {
1120                 pr_err("Alloc host visible vram on small bar is not allowed\n");
1121                 err = -EINVAL;
1122                 goto err_large_bar;
1123         }
1124
1125         pdd = kfd_bind_process_to_device(dev, p);
1126         if (IS_ERR(pdd)) {
1127                 err = PTR_ERR(pdd);
1128                 goto err_unlock;
1129         }
1130
1131         if (flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) {
1132                 if (args->size != kfd_doorbell_process_slice(dev->kfd)) {
1133                         err = -EINVAL;
1134                         goto err_unlock;
1135                 }
1136                 offset = kfd_get_process_doorbells(pdd);
1137                 if (!offset) {
1138                         err = -ENOMEM;
1139                         goto err_unlock;
1140                 }
1141         } else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) {
1142                 if (args->size != PAGE_SIZE) {
1143                         err = -EINVAL;
1144                         goto err_unlock;
1145                 }
1146                 offset = dev->adev->rmmio_remap.bus_addr;
1147                 if (!offset || (PAGE_SIZE > 4096)) {
1148                         err = -ENOMEM;
1149                         goto err_unlock;
1150                 }
1151         }
1152
1153         err = amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
1154                 dev->adev, args->va_addr, args->size,
1155                 pdd->drm_priv, (struct kgd_mem **) &mem, &offset,
1156                 flags, false);
1157
1158         if (err)
1159                 goto err_unlock;
1160
1161         idr_handle = kfd_process_device_create_obj_handle(pdd, mem);
1162         if (idr_handle < 0) {
1163                 err = -EFAULT;
1164                 goto err_free;
1165         }
1166
1167         /* Update the VRAM usage count */
1168         if (flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) {
1169                 uint64_t size = args->size;
1170
1171                 if (flags & KFD_IOC_ALLOC_MEM_FLAGS_AQL_QUEUE_MEM)
1172                         size >>= 1;
1173                 WRITE_ONCE(pdd->vram_usage, pdd->vram_usage + PAGE_ALIGN(size));
1174         }
1175
1176         mutex_unlock(&p->mutex);
1177
1178         args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);
1179         args->mmap_offset = offset;
1180
1181         /* MMIO is mapped through kfd device
1182          * Generate a kfd mmap offset
1183          */
1184         if (flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP)
1185                 args->mmap_offset = KFD_MMAP_TYPE_MMIO
1186                                         | KFD_MMAP_GPU_ID(args->gpu_id);
1187
1188         return 0;
1189
1190 err_free:
1191         amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->adev, (struct kgd_mem *)mem,
1192                                                pdd->drm_priv, NULL);
1193 err_unlock:
1194 err_pdd:
1195 err_large_bar:
1196         mutex_unlock(&p->mutex);
1197         return err;
1198 }
1199
1200 static int kfd_ioctl_free_memory_of_gpu(struct file *filep,
1201                                         struct kfd_process *p, void *data)
1202 {
1203         struct kfd_ioctl_free_memory_of_gpu_args *args = data;
1204         struct kfd_process_device *pdd;
1205         void *mem;
1206         int ret;
1207         uint64_t size = 0;
1208
1209         mutex_lock(&p->mutex);
1210         /*
1211          * Safeguard to prevent user space from freeing signal BO.
1212          * It will be freed at process termination.
1213          */
1214         if (p->signal_handle && (p->signal_handle == args->handle)) {
1215                 pr_err("Free signal BO is not allowed\n");
1216                 ret = -EPERM;
1217                 goto err_unlock;
1218         }
1219
1220         pdd = kfd_process_device_data_by_id(p, GET_GPU_ID(args->handle));
1221         if (!pdd) {
1222                 pr_err("Process device data doesn't exist\n");
1223                 ret = -EINVAL;
1224                 goto err_pdd;
1225         }
1226
1227         mem = kfd_process_device_translate_handle(
1228                 pdd, GET_IDR_HANDLE(args->handle));
1229         if (!mem) {
1230                 ret = -EINVAL;
1231                 goto err_unlock;
1232         }
1233
1234         ret = amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->adev,
1235                                 (struct kgd_mem *)mem, pdd->drm_priv, &size);
1236
1237         /* If freeing the buffer failed, leave the handle in place for
1238          * clean-up during process tear-down.
1239          */
1240         if (!ret)
1241                 kfd_process_device_remove_obj_handle(
1242                         pdd, GET_IDR_HANDLE(args->handle));
1243
1244         WRITE_ONCE(pdd->vram_usage, pdd->vram_usage - size);
1245
1246 err_unlock:
1247 err_pdd:
1248         mutex_unlock(&p->mutex);
1249         return ret;
1250 }
1251
1252 static int kfd_ioctl_map_memory_to_gpu(struct file *filep,
1253                                         struct kfd_process *p, void *data)
1254 {
1255         struct kfd_ioctl_map_memory_to_gpu_args *args = data;
1256         struct kfd_process_device *pdd, *peer_pdd;
1257         void *mem;
1258         struct kfd_node *dev;
1259         long err = 0;
1260         int i;
1261         uint32_t *devices_arr = NULL;
1262
1263         if (!args->n_devices) {
1264                 pr_debug("Device IDs array empty\n");
1265                 return -EINVAL;
1266         }
1267         if (args->n_success > args->n_devices) {
1268                 pr_debug("n_success exceeds n_devices\n");
1269                 return -EINVAL;
1270         }
1271
1272         devices_arr = kmalloc_array(args->n_devices, sizeof(*devices_arr),
1273                                     GFP_KERNEL);
1274         if (!devices_arr)
1275                 return -ENOMEM;
1276
1277         err = copy_from_user(devices_arr,
1278                              (void __user *)args->device_ids_array_ptr,
1279                              args->n_devices * sizeof(*devices_arr));
1280         if (err != 0) {
1281                 err = -EFAULT;
1282                 goto copy_from_user_failed;
1283         }
1284
1285         mutex_lock(&p->mutex);
1286         pdd = kfd_process_device_data_by_id(p, GET_GPU_ID(args->handle));
1287         if (!pdd) {
1288                 err = -EINVAL;
1289                 goto get_process_device_data_failed;
1290         }
1291         dev = pdd->dev;
1292
1293         pdd = kfd_bind_process_to_device(dev, p);
1294         if (IS_ERR(pdd)) {
1295                 err = PTR_ERR(pdd);
1296                 goto bind_process_to_device_failed;
1297         }
1298
1299         mem = kfd_process_device_translate_handle(pdd,
1300                                                 GET_IDR_HANDLE(args->handle));
1301         if (!mem) {
1302                 err = -ENOMEM;
1303                 goto get_mem_obj_from_handle_failed;
1304         }
1305
1306         for (i = args->n_success; i < args->n_devices; i++) {
1307                 peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]);
1308                 if (!peer_pdd) {
1309                         pr_debug("Getting device by id failed for 0x%x\n",
1310                                  devices_arr[i]);
1311                         err = -EINVAL;
1312                         goto get_mem_obj_from_handle_failed;
1313                 }
1314
1315                 peer_pdd = kfd_bind_process_to_device(peer_pdd->dev, p);
1316                 if (IS_ERR(peer_pdd)) {
1317                         err = PTR_ERR(peer_pdd);
1318                         goto get_mem_obj_from_handle_failed;
1319                 }
1320
1321                 err = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
1322                         peer_pdd->dev->adev, (struct kgd_mem *)mem,
1323                         peer_pdd->drm_priv);
1324                 if (err) {
1325                         struct pci_dev *pdev = peer_pdd->dev->adev->pdev;
1326
1327                         dev_err(dev->adev->dev,
1328                                "Failed to map peer:%04x:%02x:%02x.%d mem_domain:%d\n",
1329                                pci_domain_nr(pdev->bus),
1330                                pdev->bus->number,
1331                                PCI_SLOT(pdev->devfn),
1332                                PCI_FUNC(pdev->devfn),
1333                                ((struct kgd_mem *)mem)->domain);
1334                         goto map_memory_to_gpu_failed;
1335                 }
1336                 args->n_success = i+1;
1337         }
1338
1339         err = amdgpu_amdkfd_gpuvm_sync_memory(dev->adev, (struct kgd_mem *) mem, true);
1340         if (err) {
1341                 pr_debug("Sync memory failed, wait interrupted by user signal\n");
1342                 goto sync_memory_failed;
1343         }
1344
1345         mutex_unlock(&p->mutex);
1346
1347         /* Flush TLBs after waiting for the page table updates to complete */
1348         for (i = 0; i < args->n_devices; i++) {
1349                 peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]);
1350                 if (WARN_ON_ONCE(!peer_pdd))
1351                         continue;
1352                 kfd_flush_tlb(peer_pdd, TLB_FLUSH_LEGACY);
1353         }
1354         kfree(devices_arr);
1355
1356         return err;
1357
1358 get_process_device_data_failed:
1359 bind_process_to_device_failed:
1360 get_mem_obj_from_handle_failed:
1361 map_memory_to_gpu_failed:
1362 sync_memory_failed:
1363         mutex_unlock(&p->mutex);
1364 copy_from_user_failed:
1365         kfree(devices_arr);
1366
1367         return err;
1368 }
1369
1370 static int kfd_ioctl_unmap_memory_from_gpu(struct file *filep,
1371                                         struct kfd_process *p, void *data)
1372 {
1373         struct kfd_ioctl_unmap_memory_from_gpu_args *args = data;
1374         struct kfd_process_device *pdd, *peer_pdd;
1375         void *mem;
1376         long err = 0;
1377         uint32_t *devices_arr = NULL, i;
1378         bool flush_tlb;
1379
1380         if (!args->n_devices) {
1381                 pr_debug("Device IDs array empty\n");
1382                 return -EINVAL;
1383         }
1384         if (args->n_success > args->n_devices) {
1385                 pr_debug("n_success exceeds n_devices\n");
1386                 return -EINVAL;
1387         }
1388
1389         devices_arr = kmalloc_array(args->n_devices, sizeof(*devices_arr),
1390                                     GFP_KERNEL);
1391         if (!devices_arr)
1392                 return -ENOMEM;
1393
1394         err = copy_from_user(devices_arr,
1395                              (void __user *)args->device_ids_array_ptr,
1396                              args->n_devices * sizeof(*devices_arr));
1397         if (err != 0) {
1398                 err = -EFAULT;
1399                 goto copy_from_user_failed;
1400         }
1401
1402         mutex_lock(&p->mutex);
1403         pdd = kfd_process_device_data_by_id(p, GET_GPU_ID(args->handle));
1404         if (!pdd) {
1405                 err = -EINVAL;
1406                 goto bind_process_to_device_failed;
1407         }
1408
1409         mem = kfd_process_device_translate_handle(pdd,
1410                                                 GET_IDR_HANDLE(args->handle));
1411         if (!mem) {
1412                 err = -ENOMEM;
1413                 goto get_mem_obj_from_handle_failed;
1414         }
1415
1416         for (i = args->n_success; i < args->n_devices; i++) {
1417                 peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]);
1418                 if (!peer_pdd) {
1419                         err = -EINVAL;
1420                         goto get_mem_obj_from_handle_failed;
1421                 }
1422                 err = amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(
1423                         peer_pdd->dev->adev, (struct kgd_mem *)mem, peer_pdd->drm_priv);
1424                 if (err) {
1425                         pr_err("Failed to unmap from gpu %d/%d\n",
1426                                i, args->n_devices);
1427                         goto unmap_memory_from_gpu_failed;
1428                 }
1429                 args->n_success = i+1;
1430         }
1431
1432         flush_tlb = kfd_flush_tlb_after_unmap(pdd->dev->kfd);
1433         if (flush_tlb) {
1434                 err = amdgpu_amdkfd_gpuvm_sync_memory(pdd->dev->adev,
1435                                 (struct kgd_mem *) mem, true);
1436                 if (err) {
1437                         pr_debug("Sync memory failed, wait interrupted by user signal\n");
1438                         goto sync_memory_failed;
1439                 }
1440         }
1441
1442         /* Flush TLBs after waiting for the page table updates to complete */
1443         for (i = 0; i < args->n_devices; i++) {
1444                 peer_pdd = kfd_process_device_data_by_id(p, devices_arr[i]);
1445                 if (WARN_ON_ONCE(!peer_pdd))
1446                         continue;
1447                 if (flush_tlb)
1448                         kfd_flush_tlb(peer_pdd, TLB_FLUSH_HEAVYWEIGHT);
1449
1450                 /* Remove dma mapping after tlb flush to avoid IO_PAGE_FAULT */
1451                 err = amdgpu_amdkfd_gpuvm_dmaunmap_mem(mem, peer_pdd->drm_priv);
1452                 if (err)
1453                         goto sync_memory_failed;
1454         }
1455
1456         mutex_unlock(&p->mutex);
1457
1458         kfree(devices_arr);
1459
1460         return 0;
1461
1462 bind_process_to_device_failed:
1463 get_mem_obj_from_handle_failed:
1464 unmap_memory_from_gpu_failed:
1465 sync_memory_failed:
1466         mutex_unlock(&p->mutex);
1467 copy_from_user_failed:
1468         kfree(devices_arr);
1469         return err;
1470 }
1471
1472 static int kfd_ioctl_alloc_queue_gws(struct file *filep,
1473                 struct kfd_process *p, void *data)
1474 {
1475         int retval;
1476         struct kfd_ioctl_alloc_queue_gws_args *args = data;
1477         struct queue *q;
1478         struct kfd_node *dev;
1479
1480         mutex_lock(&p->mutex);
1481         q = pqm_get_user_queue(&p->pqm, args->queue_id);
1482
1483         if (q) {
1484                 dev = q->device;
1485         } else {
1486                 retval = -EINVAL;
1487                 goto out_unlock;
1488         }
1489
1490         if (!dev->gws) {
1491                 retval = -ENODEV;
1492                 goto out_unlock;
1493         }
1494
1495         if (dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
1496                 retval = -ENODEV;
1497                 goto out_unlock;
1498         }
1499
1500         if (p->debug_trap_enabled && (!kfd_dbg_has_gws_support(dev) ||
1501                                       kfd_dbg_has_cwsr_workaround(dev))) {
1502                 retval = -EBUSY;
1503                 goto out_unlock;
1504         }
1505
1506         retval = pqm_set_gws(&p->pqm, args->queue_id, args->num_gws ? dev->gws : NULL);
1507         mutex_unlock(&p->mutex);
1508
1509         args->first_gws = 0;
1510         return retval;
1511
1512 out_unlock:
1513         mutex_unlock(&p->mutex);
1514         return retval;
1515 }
1516
1517 static int kfd_ioctl_get_dmabuf_info(struct file *filep,
1518                 struct kfd_process *p, void *data)
1519 {
1520         struct kfd_ioctl_get_dmabuf_info_args *args = data;
1521         struct kfd_node *dev = NULL;
1522         struct amdgpu_device *dmabuf_adev;
1523         void *metadata_buffer = NULL;
1524         uint32_t flags;
1525         int8_t xcp_id;
1526         unsigned int i;
1527         int r;
1528
1529         /* Find a KFD GPU device that supports the get_dmabuf_info query */
1530         for (i = 0; kfd_topology_enum_kfd_devices(i, &dev) == 0; i++)
1531                 if (dev && !kfd_devcgroup_check_permission(dev))
1532                         break;
1533         if (!dev)
1534                 return -EINVAL;
1535
1536         if (args->metadata_ptr) {
1537                 metadata_buffer = kzalloc(args->metadata_size, GFP_KERNEL);
1538                 if (!metadata_buffer)
1539                         return -ENOMEM;
1540         }
1541
1542         /* Get dmabuf info from KGD */
1543         r = amdgpu_amdkfd_get_dmabuf_info(dev->adev, args->dmabuf_fd,
1544                                           &dmabuf_adev, &args->size,
1545                                           metadata_buffer, args->metadata_size,
1546                                           &args->metadata_size, &flags, &xcp_id);
1547         if (r)
1548                 goto exit;
1549
1550         if (xcp_id >= 0)
1551                 args->gpu_id = dmabuf_adev->kfd.dev->nodes[xcp_id]->id;
1552         else
1553                 args->gpu_id = dev->id;
1554         args->flags = flags;
1555
1556         /* Copy metadata buffer to user mode */
1557         if (metadata_buffer) {
1558                 r = copy_to_user((void __user *)args->metadata_ptr,
1559                                  metadata_buffer, args->metadata_size);
1560                 if (r != 0)
1561                         r = -EFAULT;
1562         }
1563
1564 exit:
1565         kfree(metadata_buffer);
1566
1567         return r;
1568 }
1569
1570 static int kfd_ioctl_import_dmabuf(struct file *filep,
1571                                    struct kfd_process *p, void *data)
1572 {
1573         struct kfd_ioctl_import_dmabuf_args *args = data;
1574         struct kfd_process_device *pdd;
1575         int idr_handle;
1576         uint64_t size;
1577         void *mem;
1578         int r;
1579
1580         mutex_lock(&p->mutex);
1581         pdd = kfd_process_device_data_by_id(p, args->gpu_id);
1582         if (!pdd) {
1583                 r = -EINVAL;
1584                 goto err_unlock;
1585         }
1586
1587         pdd = kfd_bind_process_to_device(pdd->dev, p);
1588         if (IS_ERR(pdd)) {
1589                 r = PTR_ERR(pdd);
1590                 goto err_unlock;
1591         }
1592
1593         r = amdgpu_amdkfd_gpuvm_import_dmabuf_fd(pdd->dev->adev, args->dmabuf_fd,
1594                                                  args->va_addr, pdd->drm_priv,
1595                                                  (struct kgd_mem **)&mem, &size,
1596                                                  NULL);
1597         if (r)
1598                 goto err_unlock;
1599
1600         idr_handle = kfd_process_device_create_obj_handle(pdd, mem);
1601         if (idr_handle < 0) {
1602                 r = -EFAULT;
1603                 goto err_free;
1604         }
1605
1606         mutex_unlock(&p->mutex);
1607
1608         args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);
1609
1610         return 0;
1611
1612 err_free:
1613         amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->adev, (struct kgd_mem *)mem,
1614                                                pdd->drm_priv, NULL);
1615 err_unlock:
1616         mutex_unlock(&p->mutex);
1617         return r;
1618 }
1619
1620 static int kfd_ioctl_export_dmabuf(struct file *filep,
1621                                    struct kfd_process *p, void *data)
1622 {
1623         struct kfd_ioctl_export_dmabuf_args *args = data;
1624         struct kfd_process_device *pdd;
1625         struct dma_buf *dmabuf;
1626         struct kfd_node *dev;
1627         void *mem;
1628         int ret = 0;
1629
1630         dev = kfd_device_by_id(GET_GPU_ID(args->handle));
1631         if (!dev)
1632                 return -EINVAL;
1633
1634         mutex_lock(&p->mutex);
1635
1636         pdd = kfd_get_process_device_data(dev, p);
1637         if (!pdd) {
1638                 ret = -EINVAL;
1639                 goto err_unlock;
1640         }
1641
1642         mem = kfd_process_device_translate_handle(pdd,
1643                                                 GET_IDR_HANDLE(args->handle));
1644         if (!mem) {
1645                 ret = -EINVAL;
1646                 goto err_unlock;
1647         }
1648
1649         ret = amdgpu_amdkfd_gpuvm_export_dmabuf(mem, &dmabuf);
1650         mutex_unlock(&p->mutex);
1651         if (ret)
1652                 goto err_out;
1653
1654         ret = dma_buf_fd(dmabuf, args->flags);
1655         if (ret < 0) {
1656                 dma_buf_put(dmabuf);
1657                 goto err_out;
1658         }
1659         /* dma_buf_fd assigns the reference count to the fd, no need to
1660          * put the reference here.
1661          */
1662         args->dmabuf_fd = ret;
1663
1664         return 0;
1665
1666 err_unlock:
1667         mutex_unlock(&p->mutex);
1668 err_out:
1669         return ret;
1670 }
1671
1672 /* Handle requests for watching SMI events */
1673 static int kfd_ioctl_smi_events(struct file *filep,
1674                                 struct kfd_process *p, void *data)
1675 {
1676         struct kfd_ioctl_smi_events_args *args = data;
1677         struct kfd_process_device *pdd;
1678
1679         mutex_lock(&p->mutex);
1680
1681         pdd = kfd_process_device_data_by_id(p, args->gpuid);
1682         mutex_unlock(&p->mutex);
1683         if (!pdd)
1684                 return -EINVAL;
1685
1686         return kfd_smi_event_open(pdd->dev, &args->anon_fd);
1687 }
1688
1689 #if IS_ENABLED(CONFIG_HSA_AMD_SVM)
1690
1691 static int kfd_ioctl_set_xnack_mode(struct file *filep,
1692                                     struct kfd_process *p, void *data)
1693 {
1694         struct kfd_ioctl_set_xnack_mode_args *args = data;
1695         int r = 0;
1696
1697         mutex_lock(&p->mutex);
1698         if (args->xnack_enabled >= 0) {
1699                 if (!list_empty(&p->pqm.queues)) {
1700                         pr_debug("Process has user queues running\n");
1701                         r = -EBUSY;
1702                         goto out_unlock;
1703                 }
1704
1705                 if (p->xnack_enabled == args->xnack_enabled)
1706                         goto out_unlock;
1707
1708                 if (args->xnack_enabled && !kfd_process_xnack_mode(p, true)) {
1709                         r = -EPERM;
1710                         goto out_unlock;
1711                 }
1712
1713                 r = svm_range_switch_xnack_reserve_mem(p, args->xnack_enabled);
1714         } else {
1715                 args->xnack_enabled = p->xnack_enabled;
1716         }
1717
1718 out_unlock:
1719         mutex_unlock(&p->mutex);
1720
1721         return r;
1722 }
1723
1724 static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data)
1725 {
1726         struct kfd_ioctl_svm_args *args = data;
1727         int r = 0;
1728
1729         pr_debug("start 0x%llx size 0x%llx op 0x%x nattr 0x%x\n",
1730                  args->start_addr, args->size, args->op, args->nattr);
1731
1732         if ((args->start_addr & ~PAGE_MASK) || (args->size & ~PAGE_MASK))
1733                 return -EINVAL;
1734         if (!args->start_addr || !args->size)
1735                 return -EINVAL;
1736
1737         r = svm_ioctl(p, args->op, args->start_addr, args->size, args->nattr,
1738                       args->attrs);
1739
1740         return r;
1741 }
1742 #else
1743 static int kfd_ioctl_set_xnack_mode(struct file *filep,
1744                                     struct kfd_process *p, void *data)
1745 {
1746         return -EPERM;
1747 }
1748 static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data)
1749 {
1750         return -EPERM;
1751 }
1752 #endif
1753
1754 static int criu_checkpoint_process(struct kfd_process *p,
1755                              uint8_t __user *user_priv_data,
1756                              uint64_t *priv_offset)
1757 {
1758         struct kfd_criu_process_priv_data process_priv;
1759         int ret;
1760
1761         memset(&process_priv, 0, sizeof(process_priv));
1762
1763         process_priv.version = KFD_CRIU_PRIV_VERSION;
1764         /* For CR, we don't consider negative xnack mode which is used for
1765          * querying without changing it, here 0 simply means disabled and 1
1766          * means enabled so retry for finding a valid PTE.
1767          */
1768         process_priv.xnack_mode = p->xnack_enabled ? 1 : 0;
1769
1770         ret = copy_to_user(user_priv_data + *priv_offset,
1771                                 &process_priv, sizeof(process_priv));
1772
1773         if (ret) {
1774                 pr_err("Failed to copy process information to user\n");
1775                 ret = -EFAULT;
1776         }
1777
1778         *priv_offset += sizeof(process_priv);
1779         return ret;
1780 }
1781
1782 static int criu_checkpoint_devices(struct kfd_process *p,
1783                              uint32_t num_devices,
1784                              uint8_t __user *user_addr,
1785                              uint8_t __user *user_priv_data,
1786                              uint64_t *priv_offset)
1787 {
1788         struct kfd_criu_device_priv_data *device_priv = NULL;
1789         struct kfd_criu_device_bucket *device_buckets = NULL;
1790         int ret = 0, i;
1791
1792         device_buckets = kvzalloc(num_devices * sizeof(*device_buckets), GFP_KERNEL);
1793         if (!device_buckets) {
1794                 ret = -ENOMEM;
1795                 goto exit;
1796         }
1797
1798         device_priv = kvzalloc(num_devices * sizeof(*device_priv), GFP_KERNEL);
1799         if (!device_priv) {
1800                 ret = -ENOMEM;
1801                 goto exit;
1802         }
1803
1804         for (i = 0; i < num_devices; i++) {
1805                 struct kfd_process_device *pdd = p->pdds[i];
1806
1807                 device_buckets[i].user_gpu_id = pdd->user_gpu_id;
1808                 device_buckets[i].actual_gpu_id = pdd->dev->id;
1809
1810                 /*
1811                  * priv_data does not contain useful information for now and is reserved for
1812                  * future use, so we do not set its contents.
1813                  */
1814         }
1815
1816         ret = copy_to_user(user_addr, device_buckets, num_devices * sizeof(*device_buckets));
1817         if (ret) {
1818                 pr_err("Failed to copy device information to user\n");
1819                 ret = -EFAULT;
1820                 goto exit;
1821         }
1822
1823         ret = copy_to_user(user_priv_data + *priv_offset,
1824                            device_priv,
1825                            num_devices * sizeof(*device_priv));
1826         if (ret) {
1827                 pr_err("Failed to copy device information to user\n");
1828                 ret = -EFAULT;
1829         }
1830         *priv_offset += num_devices * sizeof(*device_priv);
1831
1832 exit:
1833         kvfree(device_buckets);
1834         kvfree(device_priv);
1835         return ret;
1836 }
1837
1838 static uint32_t get_process_num_bos(struct kfd_process *p)
1839 {
1840         uint32_t num_of_bos = 0;
1841         int i;
1842
1843         /* Run over all PDDs of the process */
1844         for (i = 0; i < p->n_pdds; i++) {
1845                 struct kfd_process_device *pdd = p->pdds[i];
1846                 void *mem;
1847                 int id;
1848
1849                 idr_for_each_entry(&pdd->alloc_idr, mem, id) {
1850                         struct kgd_mem *kgd_mem = (struct kgd_mem *)mem;
1851
1852                         if (!kgd_mem->va || kgd_mem->va > pdd->gpuvm_base)
1853                                 num_of_bos++;
1854                 }
1855         }
1856         return num_of_bos;
1857 }
1858
1859 static int criu_get_prime_handle(struct kgd_mem *mem,
1860                                  int flags, u32 *shared_fd)
1861 {
1862         struct dma_buf *dmabuf;
1863         int ret;
1864
1865         ret = amdgpu_amdkfd_gpuvm_export_dmabuf(mem, &dmabuf);
1866         if (ret) {
1867                 pr_err("dmabuf export failed for the BO\n");
1868                 return ret;
1869         }
1870
1871         ret = dma_buf_fd(dmabuf, flags);
1872         if (ret < 0) {
1873                 pr_err("dmabuf create fd failed, ret:%d\n", ret);
1874                 goto out_free_dmabuf;
1875         }
1876
1877         *shared_fd = ret;
1878         return 0;
1879
1880 out_free_dmabuf:
1881         dma_buf_put(dmabuf);
1882         return ret;
1883 }
1884
1885 static int criu_checkpoint_bos(struct kfd_process *p,
1886                                uint32_t num_bos,
1887                                uint8_t __user *user_bos,
1888                                uint8_t __user *user_priv_data,
1889                                uint64_t *priv_offset)
1890 {
1891         struct kfd_criu_bo_bucket *bo_buckets;
1892         struct kfd_criu_bo_priv_data *bo_privs;
1893         int ret = 0, pdd_index, bo_index = 0, id;
1894         void *mem;
1895
1896         bo_buckets = kvzalloc(num_bos * sizeof(*bo_buckets), GFP_KERNEL);
1897         if (!bo_buckets)
1898                 return -ENOMEM;
1899
1900         bo_privs = kvzalloc(num_bos * sizeof(*bo_privs), GFP_KERNEL);
1901         if (!bo_privs) {
1902                 ret = -ENOMEM;
1903                 goto exit;
1904         }
1905
1906         for (pdd_index = 0; pdd_index < p->n_pdds; pdd_index++) {
1907                 struct kfd_process_device *pdd = p->pdds[pdd_index];
1908                 struct amdgpu_bo *dumper_bo;
1909                 struct kgd_mem *kgd_mem;
1910
1911                 idr_for_each_entry(&pdd->alloc_idr, mem, id) {
1912                         struct kfd_criu_bo_bucket *bo_bucket;
1913                         struct kfd_criu_bo_priv_data *bo_priv;
1914                         int i, dev_idx = 0;
1915
1916                         if (!mem) {
1917                                 ret = -ENOMEM;
1918                                 goto exit;
1919                         }
1920
1921                         kgd_mem = (struct kgd_mem *)mem;
1922                         dumper_bo = kgd_mem->bo;
1923
1924                         /* Skip checkpointing BOs that are used for Trap handler
1925                          * code and state. Currently, these BOs have a VA that
1926                          * is less GPUVM Base
1927                          */
1928                         if (kgd_mem->va && kgd_mem->va <= pdd->gpuvm_base)
1929                                 continue;
1930
1931                         bo_bucket = &bo_buckets[bo_index];
1932                         bo_priv = &bo_privs[bo_index];
1933
1934                         bo_bucket->gpu_id = pdd->user_gpu_id;
1935                         bo_bucket->addr = (uint64_t)kgd_mem->va;
1936                         bo_bucket->size = amdgpu_bo_size(dumper_bo);
1937                         bo_bucket->alloc_flags = (uint32_t)kgd_mem->alloc_flags;
1938                         bo_priv->idr_handle = id;
1939
1940                         if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) {
1941                                 ret = amdgpu_ttm_tt_get_userptr(&dumper_bo->tbo,
1942                                                                 &bo_priv->user_addr);
1943                                 if (ret) {
1944                                         pr_err("Failed to obtain user address for user-pointer bo\n");
1945                                         goto exit;
1946                                 }
1947                         }
1948                         if (bo_bucket->alloc_flags
1949                             & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT)) {
1950                                 ret = criu_get_prime_handle(kgd_mem,
1951                                                 bo_bucket->alloc_flags &
1952                                                 KFD_IOC_ALLOC_MEM_FLAGS_WRITABLE ? DRM_RDWR : 0,
1953                                                 &bo_bucket->dmabuf_fd);
1954                                 if (ret)
1955                                         goto exit;
1956                         } else {
1957                                 bo_bucket->dmabuf_fd = KFD_INVALID_FD;
1958                         }
1959
1960                         if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL)
1961                                 bo_bucket->offset = KFD_MMAP_TYPE_DOORBELL |
1962                                         KFD_MMAP_GPU_ID(pdd->dev->id);
1963                         else if (bo_bucket->alloc_flags &
1964                                 KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP)
1965                                 bo_bucket->offset = KFD_MMAP_TYPE_MMIO |
1966                                         KFD_MMAP_GPU_ID(pdd->dev->id);
1967                         else
1968                                 bo_bucket->offset = amdgpu_bo_mmap_offset(dumper_bo);
1969
1970                         for (i = 0; i < p->n_pdds; i++) {
1971                                 if (amdgpu_amdkfd_bo_mapped_to_dev(p->pdds[i]->dev->adev, kgd_mem))
1972                                         bo_priv->mapped_gpuids[dev_idx++] = p->pdds[i]->user_gpu_id;
1973                         }
1974
1975                         pr_debug("bo_size = 0x%llx, bo_addr = 0x%llx bo_offset = 0x%llx\n"
1976                                         "gpu_id = 0x%x alloc_flags = 0x%x idr_handle = 0x%x",
1977                                         bo_bucket->size,
1978                                         bo_bucket->addr,
1979                                         bo_bucket->offset,
1980                                         bo_bucket->gpu_id,
1981                                         bo_bucket->alloc_flags,
1982                                         bo_priv->idr_handle);
1983                         bo_index++;
1984                 }
1985         }
1986
1987         ret = copy_to_user(user_bos, bo_buckets, num_bos * sizeof(*bo_buckets));
1988         if (ret) {
1989                 pr_err("Failed to copy BO information to user\n");
1990                 ret = -EFAULT;
1991                 goto exit;
1992         }
1993
1994         ret = copy_to_user(user_priv_data + *priv_offset, bo_privs, num_bos * sizeof(*bo_privs));
1995         if (ret) {
1996                 pr_err("Failed to copy BO priv information to user\n");
1997                 ret = -EFAULT;
1998                 goto exit;
1999         }
2000
2001         *priv_offset += num_bos * sizeof(*bo_privs);
2002
2003 exit:
2004         while (ret && bo_index--) {
2005                 if (bo_buckets[bo_index].alloc_flags
2006                     & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT))
2007                         close_fd(bo_buckets[bo_index].dmabuf_fd);
2008         }
2009
2010         kvfree(bo_buckets);
2011         kvfree(bo_privs);
2012         return ret;
2013 }
2014
2015 static int criu_get_process_object_info(struct kfd_process *p,
2016                                         uint32_t *num_devices,
2017                                         uint32_t *num_bos,
2018                                         uint32_t *num_objects,
2019                                         uint64_t *objs_priv_size)
2020 {
2021         uint64_t queues_priv_data_size, svm_priv_data_size, priv_size;
2022         uint32_t num_queues, num_events, num_svm_ranges;
2023         int ret;
2024
2025         *num_devices = p->n_pdds;
2026         *num_bos = get_process_num_bos(p);
2027
2028         ret = kfd_process_get_queue_info(p, &num_queues, &queues_priv_data_size);
2029         if (ret)
2030                 return ret;
2031
2032         num_events = kfd_get_num_events(p);
2033
2034         ret = svm_range_get_info(p, &num_svm_ranges, &svm_priv_data_size);
2035         if (ret)
2036                 return ret;
2037
2038         *num_objects = num_queues + num_events + num_svm_ranges;
2039
2040         if (objs_priv_size) {
2041                 priv_size = sizeof(struct kfd_criu_process_priv_data);
2042                 priv_size += *num_devices * sizeof(struct kfd_criu_device_priv_data);
2043                 priv_size += *num_bos * sizeof(struct kfd_criu_bo_priv_data);
2044                 priv_size += queues_priv_data_size;
2045                 priv_size += num_events * sizeof(struct kfd_criu_event_priv_data);
2046                 priv_size += svm_priv_data_size;
2047                 *objs_priv_size = priv_size;
2048         }
2049         return 0;
2050 }
2051
2052 static int criu_checkpoint(struct file *filep,
2053                            struct kfd_process *p,
2054                            struct kfd_ioctl_criu_args *args)
2055 {
2056         int ret;
2057         uint32_t num_devices, num_bos, num_objects;
2058         uint64_t priv_size, priv_offset = 0, bo_priv_offset;
2059
2060         if (!args->devices || !args->bos || !args->priv_data)
2061                 return -EINVAL;
2062
2063         mutex_lock(&p->mutex);
2064
2065         if (!p->n_pdds) {
2066                 pr_err("No pdd for given process\n");
2067                 ret = -ENODEV;
2068                 goto exit_unlock;
2069         }
2070
2071         /* Confirm all process queues are evicted */
2072         if (!p->queues_paused) {
2073                 pr_err("Cannot dump process when queues are not in evicted state\n");
2074                 /* CRIU plugin did not call op PROCESS_INFO before checkpointing */
2075                 ret = -EINVAL;
2076                 goto exit_unlock;
2077         }
2078
2079         ret = criu_get_process_object_info(p, &num_devices, &num_bos, &num_objects, &priv_size);
2080         if (ret)
2081                 goto exit_unlock;
2082
2083         if (num_devices != args->num_devices ||
2084             num_bos != args->num_bos ||
2085             num_objects != args->num_objects ||
2086             priv_size != args->priv_data_size) {
2087
2088                 ret = -EINVAL;
2089                 goto exit_unlock;
2090         }
2091
2092         /* each function will store private data inside priv_data and adjust priv_offset */
2093         ret = criu_checkpoint_process(p, (uint8_t __user *)args->priv_data, &priv_offset);
2094         if (ret)
2095                 goto exit_unlock;
2096
2097         ret = criu_checkpoint_devices(p, num_devices, (uint8_t __user *)args->devices,
2098                                 (uint8_t __user *)args->priv_data, &priv_offset);
2099         if (ret)
2100                 goto exit_unlock;
2101
2102         /* Leave room for BOs in the private data. They need to be restored
2103          * before events, but we checkpoint them last to simplify the error
2104          * handling.
2105          */
2106         bo_priv_offset = priv_offset;
2107         priv_offset += num_bos * sizeof(struct kfd_criu_bo_priv_data);
2108
2109         if (num_objects) {
2110                 ret = kfd_criu_checkpoint_queues(p, (uint8_t __user *)args->priv_data,
2111                                                  &priv_offset);
2112                 if (ret)
2113                         goto exit_unlock;
2114
2115                 ret = kfd_criu_checkpoint_events(p, (uint8_t __user *)args->priv_data,
2116                                                  &priv_offset);
2117                 if (ret)
2118                         goto exit_unlock;
2119
2120                 ret = kfd_criu_checkpoint_svm(p, (uint8_t __user *)args->priv_data, &priv_offset);
2121                 if (ret)
2122                         goto exit_unlock;
2123         }
2124
2125         /* This must be the last thing in this function that can fail.
2126          * Otherwise we leak dmabuf file descriptors.
2127          */
2128         ret = criu_checkpoint_bos(p, num_bos, (uint8_t __user *)args->bos,
2129                            (uint8_t __user *)args->priv_data, &bo_priv_offset);
2130
2131 exit_unlock:
2132         mutex_unlock(&p->mutex);
2133         if (ret)
2134                 pr_err("Failed to dump CRIU ret:%d\n", ret);
2135         else
2136                 pr_debug("CRIU dump ret:%d\n", ret);
2137
2138         return ret;
2139 }
2140
2141 static int criu_restore_process(struct kfd_process *p,
2142                                 struct kfd_ioctl_criu_args *args,
2143                                 uint64_t *priv_offset,
2144                                 uint64_t max_priv_data_size)
2145 {
2146         int ret = 0;
2147         struct kfd_criu_process_priv_data process_priv;
2148
2149         if (*priv_offset + sizeof(process_priv) > max_priv_data_size)
2150                 return -EINVAL;
2151
2152         ret = copy_from_user(&process_priv,
2153                                 (void __user *)(args->priv_data + *priv_offset),
2154                                 sizeof(process_priv));
2155         if (ret) {
2156                 pr_err("Failed to copy process private information from user\n");
2157                 ret = -EFAULT;
2158                 goto exit;
2159         }
2160         *priv_offset += sizeof(process_priv);
2161
2162         if (process_priv.version != KFD_CRIU_PRIV_VERSION) {
2163                 pr_err("Invalid CRIU API version (checkpointed:%d current:%d)\n",
2164                         process_priv.version, KFD_CRIU_PRIV_VERSION);
2165                 return -EINVAL;
2166         }
2167
2168         pr_debug("Setting XNACK mode\n");
2169         if (process_priv.xnack_mode && !kfd_process_xnack_mode(p, true)) {
2170                 pr_err("xnack mode cannot be set\n");
2171                 ret = -EPERM;
2172                 goto exit;
2173         } else {
2174                 pr_debug("set xnack mode: %d\n", process_priv.xnack_mode);
2175                 p->xnack_enabled = process_priv.xnack_mode;
2176         }
2177
2178 exit:
2179         return ret;
2180 }
2181
2182 static int criu_restore_devices(struct kfd_process *p,
2183                                 struct kfd_ioctl_criu_args *args,
2184                                 uint64_t *priv_offset,
2185                                 uint64_t max_priv_data_size)
2186 {
2187         struct kfd_criu_device_bucket *device_buckets;
2188         struct kfd_criu_device_priv_data *device_privs;
2189         int ret = 0;
2190         uint32_t i;
2191
2192         if (args->num_devices != p->n_pdds)
2193                 return -EINVAL;
2194
2195         if (*priv_offset + (args->num_devices * sizeof(*device_privs)) > max_priv_data_size)
2196                 return -EINVAL;
2197
2198         device_buckets = kmalloc_array(args->num_devices, sizeof(*device_buckets), GFP_KERNEL);
2199         if (!device_buckets)
2200                 return -ENOMEM;
2201
2202         ret = copy_from_user(device_buckets, (void __user *)args->devices,
2203                                 args->num_devices * sizeof(*device_buckets));
2204         if (ret) {
2205                 pr_err("Failed to copy devices buckets from user\n");
2206                 ret = -EFAULT;
2207                 goto exit;
2208         }
2209
2210         for (i = 0; i < args->num_devices; i++) {
2211                 struct kfd_node *dev;
2212                 struct kfd_process_device *pdd;
2213                 struct file *drm_file;
2214
2215                 /* device private data is not currently used */
2216
2217                 if (!device_buckets[i].user_gpu_id) {
2218                         pr_err("Invalid user gpu_id\n");
2219                         ret = -EINVAL;
2220                         goto exit;
2221                 }
2222
2223                 dev = kfd_device_by_id(device_buckets[i].actual_gpu_id);
2224                 if (!dev) {
2225                         pr_err("Failed to find device with gpu_id = %x\n",
2226                                 device_buckets[i].actual_gpu_id);
2227                         ret = -EINVAL;
2228                         goto exit;
2229                 }
2230
2231                 pdd = kfd_get_process_device_data(dev, p);
2232                 if (!pdd) {
2233                         pr_err("Failed to get pdd for gpu_id = %x\n",
2234                                         device_buckets[i].actual_gpu_id);
2235                         ret = -EINVAL;
2236                         goto exit;
2237                 }
2238                 pdd->user_gpu_id = device_buckets[i].user_gpu_id;
2239
2240                 drm_file = fget(device_buckets[i].drm_fd);
2241                 if (!drm_file) {
2242                         pr_err("Invalid render node file descriptor sent from plugin (%d)\n",
2243                                 device_buckets[i].drm_fd);
2244                         ret = -EINVAL;
2245                         goto exit;
2246                 }
2247
2248                 if (pdd->drm_file) {
2249                         ret = -EINVAL;
2250                         goto exit;
2251                 }
2252
2253                 /* create the vm using render nodes for kfd pdd */
2254                 if (kfd_process_device_init_vm(pdd, drm_file)) {
2255                         pr_err("could not init vm for given pdd\n");
2256                         /* On success, the PDD keeps the drm_file reference */
2257                         fput(drm_file);
2258                         ret = -EINVAL;
2259                         goto exit;
2260                 }
2261                 /*
2262                  * pdd now already has the vm bound to render node so below api won't create a new
2263                  * exclusive kfd mapping but use existing one with renderDXXX but is still needed
2264                  * for iommu v2 binding  and runtime pm.
2265                  */
2266                 pdd = kfd_bind_process_to_device(dev, p);
2267                 if (IS_ERR(pdd)) {
2268                         ret = PTR_ERR(pdd);
2269                         goto exit;
2270                 }
2271
2272                 if (!pdd->qpd.proc_doorbells) {
2273                         ret = kfd_alloc_process_doorbells(dev->kfd, pdd);
2274                         if (ret)
2275                                 goto exit;
2276                 }
2277         }
2278
2279         /*
2280          * We are not copying device private data from user as we are not using the data for now,
2281          * but we still adjust for its private data.
2282          */
2283         *priv_offset += args->num_devices * sizeof(*device_privs);
2284
2285 exit:
2286         kfree(device_buckets);
2287         return ret;
2288 }
2289
2290 static int criu_restore_memory_of_gpu(struct kfd_process_device *pdd,
2291                                       struct kfd_criu_bo_bucket *bo_bucket,
2292                                       struct kfd_criu_bo_priv_data *bo_priv,
2293                                       struct kgd_mem **kgd_mem)
2294 {
2295         int idr_handle;
2296         int ret;
2297         const bool criu_resume = true;
2298         u64 offset;
2299
2300         if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) {
2301                 if (bo_bucket->size !=
2302                                 kfd_doorbell_process_slice(pdd->dev->kfd))
2303                         return -EINVAL;
2304
2305                 offset = kfd_get_process_doorbells(pdd);
2306                 if (!offset)
2307                         return -ENOMEM;
2308         } else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) {
2309                 /* MMIO BOs need remapped bus address */
2310                 if (bo_bucket->size != PAGE_SIZE) {
2311                         pr_err("Invalid page size\n");
2312                         return -EINVAL;
2313                 }
2314                 offset = pdd->dev->adev->rmmio_remap.bus_addr;
2315                 if (!offset || (PAGE_SIZE > 4096)) {
2316                         pr_err("amdgpu_amdkfd_get_mmio_remap_phys_addr failed\n");
2317                         return -ENOMEM;
2318                 }
2319         } else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) {
2320                 offset = bo_priv->user_addr;
2321         }
2322         /* Create the BO */
2323         ret = amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(pdd->dev->adev, bo_bucket->addr,
2324                                                       bo_bucket->size, pdd->drm_priv, kgd_mem,
2325                                                       &offset, bo_bucket->alloc_flags, criu_resume);
2326         if (ret) {
2327                 pr_err("Could not create the BO\n");
2328                 return ret;
2329         }
2330         pr_debug("New BO created: size:0x%llx addr:0x%llx offset:0x%llx\n",
2331                  bo_bucket->size, bo_bucket->addr, offset);
2332
2333         /* Restore previous IDR handle */
2334         pr_debug("Restoring old IDR handle for the BO");
2335         idr_handle = idr_alloc(&pdd->alloc_idr, *kgd_mem, bo_priv->idr_handle,
2336                                bo_priv->idr_handle + 1, GFP_KERNEL);
2337
2338         if (idr_handle < 0) {
2339                 pr_err("Could not allocate idr\n");
2340                 amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->adev, *kgd_mem, pdd->drm_priv,
2341                                                        NULL);
2342                 return -ENOMEM;
2343         }
2344
2345         if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL)
2346                 bo_bucket->restored_offset = KFD_MMAP_TYPE_DOORBELL | KFD_MMAP_GPU_ID(pdd->dev->id);
2347         if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) {
2348                 bo_bucket->restored_offset = KFD_MMAP_TYPE_MMIO | KFD_MMAP_GPU_ID(pdd->dev->id);
2349         } else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_GTT) {
2350                 bo_bucket->restored_offset = offset;
2351         } else if (bo_bucket->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) {
2352                 bo_bucket->restored_offset = offset;
2353                 /* Update the VRAM usage count */
2354                 WRITE_ONCE(pdd->vram_usage, pdd->vram_usage + bo_bucket->size);
2355         }
2356         return 0;
2357 }
2358
2359 static int criu_restore_bo(struct kfd_process *p,
2360                            struct kfd_criu_bo_bucket *bo_bucket,
2361                            struct kfd_criu_bo_priv_data *bo_priv)
2362 {
2363         struct kfd_process_device *pdd;
2364         struct kgd_mem *kgd_mem;
2365         int ret;
2366         int j;
2367
2368         pr_debug("Restoring BO size:0x%llx addr:0x%llx gpu_id:0x%x flags:0x%x idr_handle:0x%x\n",
2369                  bo_bucket->size, bo_bucket->addr, bo_bucket->gpu_id, bo_bucket->alloc_flags,
2370                  bo_priv->idr_handle);
2371
2372         pdd = kfd_process_device_data_by_id(p, bo_bucket->gpu_id);
2373         if (!pdd) {
2374                 pr_err("Failed to get pdd\n");
2375                 return -ENODEV;
2376         }
2377
2378         ret = criu_restore_memory_of_gpu(pdd, bo_bucket, bo_priv, &kgd_mem);
2379         if (ret)
2380                 return ret;
2381
2382         /* now map these BOs to GPU/s */
2383         for (j = 0; j < p->n_pdds; j++) {
2384                 struct kfd_node *peer;
2385                 struct kfd_process_device *peer_pdd;
2386
2387                 if (!bo_priv->mapped_gpuids[j])
2388                         break;
2389
2390                 peer_pdd = kfd_process_device_data_by_id(p, bo_priv->mapped_gpuids[j]);
2391                 if (!peer_pdd)
2392                         return -EINVAL;
2393
2394                 peer = peer_pdd->dev;
2395
2396                 peer_pdd = kfd_bind_process_to_device(peer, p);
2397                 if (IS_ERR(peer_pdd))
2398                         return PTR_ERR(peer_pdd);
2399
2400                 ret = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(peer->adev, kgd_mem,
2401                                                             peer_pdd->drm_priv);
2402                 if (ret) {
2403                         pr_err("Failed to map to gpu %d/%d\n", j, p->n_pdds);
2404                         return ret;
2405                 }
2406         }
2407
2408         pr_debug("map memory was successful for the BO\n");
2409         /* create the dmabuf object and export the bo */
2410         if (bo_bucket->alloc_flags
2411             & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT)) {
2412                 ret = criu_get_prime_handle(kgd_mem, DRM_RDWR,
2413                                             &bo_bucket->dmabuf_fd);
2414                 if (ret)
2415                         return ret;
2416         } else {
2417                 bo_bucket->dmabuf_fd = KFD_INVALID_FD;
2418         }
2419
2420         return 0;
2421 }
2422
2423 static int criu_restore_bos(struct kfd_process *p,
2424                             struct kfd_ioctl_criu_args *args,
2425                             uint64_t *priv_offset,
2426                             uint64_t max_priv_data_size)
2427 {
2428         struct kfd_criu_bo_bucket *bo_buckets = NULL;
2429         struct kfd_criu_bo_priv_data *bo_privs = NULL;
2430         int ret = 0;
2431         uint32_t i = 0;
2432
2433         if (*priv_offset + (args->num_bos * sizeof(*bo_privs)) > max_priv_data_size)
2434                 return -EINVAL;
2435
2436         /* Prevent MMU notifications until stage-4 IOCTL (CRIU_RESUME) is received */
2437         amdgpu_amdkfd_block_mmu_notifications(p->kgd_process_info);
2438
2439         bo_buckets = kvmalloc_array(args->num_bos, sizeof(*bo_buckets), GFP_KERNEL);
2440         if (!bo_buckets)
2441                 return -ENOMEM;
2442
2443         ret = copy_from_user(bo_buckets, (void __user *)args->bos,
2444                              args->num_bos * sizeof(*bo_buckets));
2445         if (ret) {
2446                 pr_err("Failed to copy BOs information from user\n");
2447                 ret = -EFAULT;
2448                 goto exit;
2449         }
2450
2451         bo_privs = kvmalloc_array(args->num_bos, sizeof(*bo_privs), GFP_KERNEL);
2452         if (!bo_privs) {
2453                 ret = -ENOMEM;
2454                 goto exit;
2455         }
2456
2457         ret = copy_from_user(bo_privs, (void __user *)args->priv_data + *priv_offset,
2458                              args->num_bos * sizeof(*bo_privs));
2459         if (ret) {
2460                 pr_err("Failed to copy BOs information from user\n");
2461                 ret = -EFAULT;
2462                 goto exit;
2463         }
2464         *priv_offset += args->num_bos * sizeof(*bo_privs);
2465
2466         /* Create and map new BOs */
2467         for (; i < args->num_bos; i++) {
2468                 ret = criu_restore_bo(p, &bo_buckets[i], &bo_privs[i]);
2469                 if (ret) {
2470                         pr_debug("Failed to restore BO[%d] ret%d\n", i, ret);
2471                         goto exit;
2472                 }
2473         } /* done */
2474
2475         /* Copy only the buckets back so user can read bo_buckets[N].restored_offset */
2476         ret = copy_to_user((void __user *)args->bos,
2477                                 bo_buckets,
2478                                 (args->num_bos * sizeof(*bo_buckets)));
2479         if (ret)
2480                 ret = -EFAULT;
2481
2482 exit:
2483         while (ret && i--) {
2484                 if (bo_buckets[i].alloc_flags
2485                    & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT))
2486                         close_fd(bo_buckets[i].dmabuf_fd);
2487         }
2488         kvfree(bo_buckets);
2489         kvfree(bo_privs);
2490         return ret;
2491 }
2492
2493 static int criu_restore_objects(struct file *filep,
2494                                 struct kfd_process *p,
2495                                 struct kfd_ioctl_criu_args *args,
2496                                 uint64_t *priv_offset,
2497                                 uint64_t max_priv_data_size)
2498 {
2499         int ret = 0;
2500         uint32_t i;
2501
2502         BUILD_BUG_ON(offsetof(struct kfd_criu_queue_priv_data, object_type));
2503         BUILD_BUG_ON(offsetof(struct kfd_criu_event_priv_data, object_type));
2504         BUILD_BUG_ON(offsetof(struct kfd_criu_svm_range_priv_data, object_type));
2505
2506         for (i = 0; i < args->num_objects; i++) {
2507                 uint32_t object_type;
2508
2509                 if (*priv_offset + sizeof(object_type) > max_priv_data_size) {
2510                         pr_err("Invalid private data size\n");
2511                         return -EINVAL;
2512                 }
2513
2514                 ret = get_user(object_type, (uint32_t __user *)(args->priv_data + *priv_offset));
2515                 if (ret) {
2516                         pr_err("Failed to copy private information from user\n");
2517                         goto exit;
2518                 }
2519
2520                 switch (object_type) {
2521                 case KFD_CRIU_OBJECT_TYPE_QUEUE:
2522                         ret = kfd_criu_restore_queue(p, (uint8_t __user *)args->priv_data,
2523                                                      priv_offset, max_priv_data_size);
2524                         if (ret)
2525                                 goto exit;
2526                         break;
2527                 case KFD_CRIU_OBJECT_TYPE_EVENT:
2528                         ret = kfd_criu_restore_event(filep, p, (uint8_t __user *)args->priv_data,
2529                                                      priv_offset, max_priv_data_size);
2530                         if (ret)
2531                                 goto exit;
2532                         break;
2533                 case KFD_CRIU_OBJECT_TYPE_SVM_RANGE:
2534                         ret = kfd_criu_restore_svm(p, (uint8_t __user *)args->priv_data,
2535                                                      priv_offset, max_priv_data_size);
2536                         if (ret)
2537                                 goto exit;
2538                         break;
2539                 default:
2540                         pr_err("Invalid object type:%u at index:%d\n", object_type, i);
2541                         ret = -EINVAL;
2542                         goto exit;
2543                 }
2544         }
2545 exit:
2546         return ret;
2547 }
2548
2549 static int criu_restore(struct file *filep,
2550                         struct kfd_process *p,
2551                         struct kfd_ioctl_criu_args *args)
2552 {
2553         uint64_t priv_offset = 0;
2554         int ret = 0;
2555
2556         pr_debug("CRIU restore (num_devices:%u num_bos:%u num_objects:%u priv_data_size:%llu)\n",
2557                  args->num_devices, args->num_bos, args->num_objects, args->priv_data_size);
2558
2559         if (!args->bos || !args->devices || !args->priv_data || !args->priv_data_size ||
2560             !args->num_devices || !args->num_bos)
2561                 return -EINVAL;
2562
2563         mutex_lock(&p->mutex);
2564
2565         /*
2566          * Set the process to evicted state to avoid running any new queues before all the memory
2567          * mappings are ready.
2568          */
2569         ret = kfd_process_evict_queues(p, KFD_QUEUE_EVICTION_CRIU_RESTORE);
2570         if (ret)
2571                 goto exit_unlock;
2572
2573         /* Each function will adjust priv_offset based on how many bytes they consumed */
2574         ret = criu_restore_process(p, args, &priv_offset, args->priv_data_size);
2575         if (ret)
2576                 goto exit_unlock;
2577
2578         ret = criu_restore_devices(p, args, &priv_offset, args->priv_data_size);
2579         if (ret)
2580                 goto exit_unlock;
2581
2582         ret = criu_restore_bos(p, args, &priv_offset, args->priv_data_size);
2583         if (ret)
2584                 goto exit_unlock;
2585
2586         ret = criu_restore_objects(filep, p, args, &priv_offset, args->priv_data_size);
2587         if (ret)
2588                 goto exit_unlock;
2589
2590         if (priv_offset != args->priv_data_size) {
2591                 pr_err("Invalid private data size\n");
2592                 ret = -EINVAL;
2593         }
2594
2595 exit_unlock:
2596         mutex_unlock(&p->mutex);
2597         if (ret)
2598                 pr_err("Failed to restore CRIU ret:%d\n", ret);
2599         else
2600                 pr_debug("CRIU restore successful\n");
2601
2602         return ret;
2603 }
2604
2605 static int criu_unpause(struct file *filep,
2606                         struct kfd_process *p,
2607                         struct kfd_ioctl_criu_args *args)
2608 {
2609         int ret;
2610
2611         mutex_lock(&p->mutex);
2612
2613         if (!p->queues_paused) {
2614                 mutex_unlock(&p->mutex);
2615                 return -EINVAL;
2616         }
2617
2618         ret = kfd_process_restore_queues(p);
2619         if (ret)
2620                 pr_err("Failed to unpause queues ret:%d\n", ret);
2621         else
2622                 p->queues_paused = false;
2623
2624         mutex_unlock(&p->mutex);
2625
2626         return ret;
2627 }
2628
2629 static int criu_resume(struct file *filep,
2630                         struct kfd_process *p,
2631                         struct kfd_ioctl_criu_args *args)
2632 {
2633         struct kfd_process *target = NULL;
2634         struct pid *pid = NULL;
2635         int ret = 0;
2636
2637         pr_debug("Inside %s, target pid for criu restore: %d\n", __func__,
2638                  args->pid);
2639
2640         pid = find_get_pid(args->pid);
2641         if (!pid) {
2642                 pr_err("Cannot find pid info for %i\n", args->pid);
2643                 return -ESRCH;
2644         }
2645
2646         pr_debug("calling kfd_lookup_process_by_pid\n");
2647         target = kfd_lookup_process_by_pid(pid);
2648
2649         put_pid(pid);
2650
2651         if (!target) {
2652                 pr_debug("Cannot find process info for %i\n", args->pid);
2653                 return -ESRCH;
2654         }
2655
2656         mutex_lock(&target->mutex);
2657         ret = kfd_criu_resume_svm(target);
2658         if (ret) {
2659                 pr_err("kfd_criu_resume_svm failed for %i\n", args->pid);
2660                 goto exit;
2661         }
2662
2663         ret =  amdgpu_amdkfd_criu_resume(target->kgd_process_info);
2664         if (ret)
2665                 pr_err("amdgpu_amdkfd_criu_resume failed for %i\n", args->pid);
2666
2667 exit:
2668         mutex_unlock(&target->mutex);
2669
2670         kfd_unref_process(target);
2671         return ret;
2672 }
2673
2674 static int criu_process_info(struct file *filep,
2675                                 struct kfd_process *p,
2676                                 struct kfd_ioctl_criu_args *args)
2677 {
2678         int ret = 0;
2679
2680         mutex_lock(&p->mutex);
2681
2682         if (!p->n_pdds) {
2683                 pr_err("No pdd for given process\n");
2684                 ret = -ENODEV;
2685                 goto err_unlock;
2686         }
2687
2688         ret = kfd_process_evict_queues(p, KFD_QUEUE_EVICTION_CRIU_CHECKPOINT);
2689         if (ret)
2690                 goto err_unlock;
2691
2692         p->queues_paused = true;
2693
2694         args->pid = task_pid_nr_ns(p->lead_thread,
2695                                         task_active_pid_ns(p->lead_thread));
2696
2697         ret = criu_get_process_object_info(p, &args->num_devices, &args->num_bos,
2698                                            &args->num_objects, &args->priv_data_size);
2699         if (ret)
2700                 goto err_unlock;
2701
2702         dev_dbg(kfd_device, "Num of devices:%u bos:%u objects:%u priv_data_size:%lld\n",
2703                                 args->num_devices, args->num_bos, args->num_objects,
2704                                 args->priv_data_size);
2705
2706 err_unlock:
2707         if (ret) {
2708                 kfd_process_restore_queues(p);
2709                 p->queues_paused = false;
2710         }
2711         mutex_unlock(&p->mutex);
2712         return ret;
2713 }
2714
2715 static int kfd_ioctl_criu(struct file *filep, struct kfd_process *p, void *data)
2716 {
2717         struct kfd_ioctl_criu_args *args = data;
2718         int ret;
2719
2720         dev_dbg(kfd_device, "CRIU operation: %d\n", args->op);
2721         switch (args->op) {
2722         case KFD_CRIU_OP_PROCESS_INFO:
2723                 ret = criu_process_info(filep, p, args);
2724                 break;
2725         case KFD_CRIU_OP_CHECKPOINT:
2726                 ret = criu_checkpoint(filep, p, args);
2727                 break;
2728         case KFD_CRIU_OP_UNPAUSE:
2729                 ret = criu_unpause(filep, p, args);
2730                 break;
2731         case KFD_CRIU_OP_RESTORE:
2732                 ret = criu_restore(filep, p, args);
2733                 break;
2734         case KFD_CRIU_OP_RESUME:
2735                 ret = criu_resume(filep, p, args);
2736                 break;
2737         default:
2738                 dev_dbg(kfd_device, "Unsupported CRIU operation:%d\n", args->op);
2739                 ret = -EINVAL;
2740                 break;
2741         }
2742
2743         if (ret)
2744                 dev_dbg(kfd_device, "CRIU operation:%d err:%d\n", args->op, ret);
2745
2746         return ret;
2747 }
2748
2749 static int runtime_enable(struct kfd_process *p, uint64_t r_debug,
2750                         bool enable_ttmp_setup)
2751 {
2752         int i = 0, ret = 0;
2753
2754         if (p->is_runtime_retry)
2755                 goto retry;
2756
2757         if (p->runtime_info.runtime_state != DEBUG_RUNTIME_STATE_DISABLED)
2758                 return -EBUSY;
2759
2760         for (i = 0; i < p->n_pdds; i++) {
2761                 struct kfd_process_device *pdd = p->pdds[i];
2762
2763                 if (pdd->qpd.queue_count)
2764                         return -EEXIST;
2765
2766                 /*
2767                  * Setup TTMPs by default.
2768                  * Note that this call must remain here for MES ADD QUEUE to
2769                  * skip_process_ctx_clear unconditionally as the first call to
2770                  * SET_SHADER_DEBUGGER clears any stale process context data
2771                  * saved in MES.
2772                  */
2773                 if (pdd->dev->kfd->shared_resources.enable_mes)
2774                         kfd_dbg_set_mes_debug_mode(pdd, !kfd_dbg_has_cwsr_workaround(pdd->dev));
2775         }
2776
2777         p->runtime_info.runtime_state = DEBUG_RUNTIME_STATE_ENABLED;
2778         p->runtime_info.r_debug = r_debug;
2779         p->runtime_info.ttmp_setup = enable_ttmp_setup;
2780
2781         if (p->runtime_info.ttmp_setup) {
2782                 for (i = 0; i < p->n_pdds; i++) {
2783                         struct kfd_process_device *pdd = p->pdds[i];
2784
2785                         if (!kfd_dbg_is_rlc_restore_supported(pdd->dev)) {
2786                                 amdgpu_gfx_off_ctrl(pdd->dev->adev, false);
2787                                 pdd->dev->kfd2kgd->enable_debug_trap(
2788                                                 pdd->dev->adev,
2789                                                 true,
2790                                                 pdd->dev->vm_info.last_vmid_kfd);
2791                         } else if (kfd_dbg_is_per_vmid_supported(pdd->dev)) {
2792                                 pdd->spi_dbg_override = pdd->dev->kfd2kgd->enable_debug_trap(
2793                                                 pdd->dev->adev,
2794                                                 false,
2795                                                 0);
2796                         }
2797                 }
2798         }
2799
2800 retry:
2801         if (p->debug_trap_enabled) {
2802                 if (!p->is_runtime_retry) {
2803                         kfd_dbg_trap_activate(p);
2804                         kfd_dbg_ev_raise(KFD_EC_MASK(EC_PROCESS_RUNTIME),
2805                                         p, NULL, 0, false, NULL, 0);
2806                 }
2807
2808                 mutex_unlock(&p->mutex);
2809                 ret = down_interruptible(&p->runtime_enable_sema);
2810                 mutex_lock(&p->mutex);
2811
2812                 p->is_runtime_retry = !!ret;
2813         }
2814
2815         return ret;
2816 }
2817
2818 static int runtime_disable(struct kfd_process *p)
2819 {
2820         int i = 0, ret;
2821         bool was_enabled = p->runtime_info.runtime_state == DEBUG_RUNTIME_STATE_ENABLED;
2822
2823         p->runtime_info.runtime_state = DEBUG_RUNTIME_STATE_DISABLED;
2824         p->runtime_info.r_debug = 0;
2825
2826         if (p->debug_trap_enabled) {
2827                 if (was_enabled)
2828                         kfd_dbg_trap_deactivate(p, false, 0);
2829
2830                 if (!p->is_runtime_retry)
2831                         kfd_dbg_ev_raise(KFD_EC_MASK(EC_PROCESS_RUNTIME),
2832                                         p, NULL, 0, false, NULL, 0);
2833
2834                 mutex_unlock(&p->mutex);
2835                 ret = down_interruptible(&p->runtime_enable_sema);
2836                 mutex_lock(&p->mutex);
2837
2838                 p->is_runtime_retry = !!ret;
2839                 if (ret)
2840                         return ret;
2841         }
2842
2843         if (was_enabled && p->runtime_info.ttmp_setup) {
2844                 for (i = 0; i < p->n_pdds; i++) {
2845                         struct kfd_process_device *pdd = p->pdds[i];
2846
2847                         if (!kfd_dbg_is_rlc_restore_supported(pdd->dev))
2848                                 amdgpu_gfx_off_ctrl(pdd->dev->adev, true);
2849                 }
2850         }
2851
2852         p->runtime_info.ttmp_setup = false;
2853
2854         /* disable ttmp setup */
2855         for (i = 0; i < p->n_pdds; i++) {
2856                 struct kfd_process_device *pdd = p->pdds[i];
2857
2858                 if (kfd_dbg_is_per_vmid_supported(pdd->dev)) {
2859                         pdd->spi_dbg_override =
2860                                         pdd->dev->kfd2kgd->disable_debug_trap(
2861                                         pdd->dev->adev,
2862                                         false,
2863                                         pdd->dev->vm_info.last_vmid_kfd);
2864
2865                         if (!pdd->dev->kfd->shared_resources.enable_mes)
2866                                 debug_refresh_runlist(pdd->dev->dqm);
2867                         else
2868                                 kfd_dbg_set_mes_debug_mode(pdd,
2869                                                            !kfd_dbg_has_cwsr_workaround(pdd->dev));
2870                 }
2871         }
2872
2873         return 0;
2874 }
2875
2876 static int kfd_ioctl_runtime_enable(struct file *filep, struct kfd_process *p, void *data)
2877 {
2878         struct kfd_ioctl_runtime_enable_args *args = data;
2879         int r;
2880
2881         mutex_lock(&p->mutex);
2882
2883         if (args->mode_mask & KFD_RUNTIME_ENABLE_MODE_ENABLE_MASK)
2884                 r = runtime_enable(p, args->r_debug,
2885                                 !!(args->mode_mask & KFD_RUNTIME_ENABLE_MODE_TTMP_SAVE_MASK));
2886         else
2887                 r = runtime_disable(p);
2888
2889         mutex_unlock(&p->mutex);
2890
2891         return r;
2892 }
2893
2894 static int kfd_ioctl_set_debug_trap(struct file *filep, struct kfd_process *p, void *data)
2895 {
2896         struct kfd_ioctl_dbg_trap_args *args = data;
2897         struct task_struct *thread = NULL;
2898         struct mm_struct *mm = NULL;
2899         struct pid *pid = NULL;
2900         struct kfd_process *target = NULL;
2901         struct kfd_process_device *pdd = NULL;
2902         int r = 0;
2903
2904         if (sched_policy == KFD_SCHED_POLICY_NO_HWS) {
2905                 pr_err("Debugging does not support sched_policy %i", sched_policy);
2906                 return -EINVAL;
2907         }
2908
2909         pid = find_get_pid(args->pid);
2910         if (!pid) {
2911                 pr_debug("Cannot find pid info for %i\n", args->pid);
2912                 r = -ESRCH;
2913                 goto out;
2914         }
2915
2916         thread = get_pid_task(pid, PIDTYPE_PID);
2917         if (!thread) {
2918                 r = -ESRCH;
2919                 goto out;
2920         }
2921
2922         mm = get_task_mm(thread);
2923         if (!mm) {
2924                 r = -ESRCH;
2925                 goto out;
2926         }
2927
2928         if (args->op == KFD_IOC_DBG_TRAP_ENABLE) {
2929                 bool create_process;
2930
2931                 rcu_read_lock();
2932                 create_process = thread && thread != current && ptrace_parent(thread) == current;
2933                 rcu_read_unlock();
2934
2935                 target = create_process ? kfd_create_process(thread) :
2936                                         kfd_lookup_process_by_pid(pid);
2937         } else {
2938                 target = kfd_lookup_process_by_pid(pid);
2939         }
2940
2941         if (IS_ERR_OR_NULL(target)) {
2942                 pr_debug("Cannot find process PID %i to debug\n", args->pid);
2943                 r = target ? PTR_ERR(target) : -ESRCH;
2944                 target = NULL;
2945                 goto out;
2946         }
2947
2948         /* Check if target is still PTRACED. */
2949         rcu_read_lock();
2950         if (target != p && args->op != KFD_IOC_DBG_TRAP_DISABLE
2951                                 && ptrace_parent(target->lead_thread) != current) {
2952                 pr_err("PID %i is not PTRACED and cannot be debugged\n", args->pid);
2953                 r = -EPERM;
2954         }
2955         rcu_read_unlock();
2956
2957         if (r)
2958                 goto out;
2959
2960         mutex_lock(&target->mutex);
2961
2962         if (args->op != KFD_IOC_DBG_TRAP_ENABLE && !target->debug_trap_enabled) {
2963                 pr_err("PID %i not debug enabled for op %i\n", args->pid, args->op);
2964                 r = -EINVAL;
2965                 goto unlock_out;
2966         }
2967
2968         if (target->runtime_info.runtime_state != DEBUG_RUNTIME_STATE_ENABLED &&
2969                         (args->op == KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_OVERRIDE ||
2970                          args->op == KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_MODE ||
2971                          args->op == KFD_IOC_DBG_TRAP_SUSPEND_QUEUES ||
2972                          args->op == KFD_IOC_DBG_TRAP_RESUME_QUEUES ||
2973                          args->op == KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH ||
2974                          args->op == KFD_IOC_DBG_TRAP_CLEAR_NODE_ADDRESS_WATCH ||
2975                          args->op == KFD_IOC_DBG_TRAP_SET_FLAGS)) {
2976                 r = -EPERM;
2977                 goto unlock_out;
2978         }
2979
2980         if (args->op == KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH ||
2981             args->op == KFD_IOC_DBG_TRAP_CLEAR_NODE_ADDRESS_WATCH) {
2982                 int user_gpu_id = kfd_process_get_user_gpu_id(target,
2983                                 args->op == KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH ?
2984                                         args->set_node_address_watch.gpu_id :
2985                                         args->clear_node_address_watch.gpu_id);
2986
2987                 pdd = kfd_process_device_data_by_id(target, user_gpu_id);
2988                 if (user_gpu_id == -EINVAL || !pdd) {
2989                         r = -ENODEV;
2990                         goto unlock_out;
2991                 }
2992         }
2993
2994         switch (args->op) {
2995         case KFD_IOC_DBG_TRAP_ENABLE:
2996                 if (target != p)
2997                         target->debugger_process = p;
2998
2999                 r = kfd_dbg_trap_enable(target,
3000                                         args->enable.dbg_fd,
3001                                         (void __user *)args->enable.rinfo_ptr,
3002                                         &args->enable.rinfo_size);
3003                 if (!r)
3004                         target->exception_enable_mask = args->enable.exception_mask;
3005
3006                 break;
3007         case KFD_IOC_DBG_TRAP_DISABLE:
3008                 r = kfd_dbg_trap_disable(target);
3009                 break;
3010         case KFD_IOC_DBG_TRAP_SEND_RUNTIME_EVENT:
3011                 r = kfd_dbg_send_exception_to_runtime(target,
3012                                 args->send_runtime_event.gpu_id,
3013                                 args->send_runtime_event.queue_id,
3014                                 args->send_runtime_event.exception_mask);
3015                 break;
3016         case KFD_IOC_DBG_TRAP_SET_EXCEPTIONS_ENABLED:
3017                 kfd_dbg_set_enabled_debug_exception_mask(target,
3018                                 args->set_exceptions_enabled.exception_mask);
3019                 break;
3020         case KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_OVERRIDE:
3021                 r = kfd_dbg_trap_set_wave_launch_override(target,
3022                                 args->launch_override.override_mode,
3023                                 args->launch_override.enable_mask,
3024                                 args->launch_override.support_request_mask,
3025                                 &args->launch_override.enable_mask,
3026                                 &args->launch_override.support_request_mask);
3027                 break;
3028         case KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_MODE:
3029                 r = kfd_dbg_trap_set_wave_launch_mode(target,
3030                                 args->launch_mode.launch_mode);
3031                 break;
3032         case KFD_IOC_DBG_TRAP_SUSPEND_QUEUES:
3033                 r = suspend_queues(target,
3034                                 args->suspend_queues.num_queues,
3035                                 args->suspend_queues.grace_period,
3036                                 args->suspend_queues.exception_mask,
3037                                 (uint32_t *)args->suspend_queues.queue_array_ptr);
3038
3039                 break;
3040         case KFD_IOC_DBG_TRAP_RESUME_QUEUES:
3041                 r = resume_queues(target, args->resume_queues.num_queues,
3042                                 (uint32_t *)args->resume_queues.queue_array_ptr);
3043                 break;
3044         case KFD_IOC_DBG_TRAP_SET_NODE_ADDRESS_WATCH:
3045                 r = kfd_dbg_trap_set_dev_address_watch(pdd,
3046                                 args->set_node_address_watch.address,
3047                                 args->set_node_address_watch.mask,
3048                                 &args->set_node_address_watch.id,
3049                                 args->set_node_address_watch.mode);
3050                 break;
3051         case KFD_IOC_DBG_TRAP_CLEAR_NODE_ADDRESS_WATCH:
3052                 r = kfd_dbg_trap_clear_dev_address_watch(pdd,
3053                                 args->clear_node_address_watch.id);
3054                 break;
3055         case KFD_IOC_DBG_TRAP_SET_FLAGS:
3056                 r = kfd_dbg_trap_set_flags(target, &args->set_flags.flags);
3057                 break;
3058         case KFD_IOC_DBG_TRAP_QUERY_DEBUG_EVENT:
3059                 r = kfd_dbg_ev_query_debug_event(target,
3060                                 &args->query_debug_event.queue_id,
3061                                 &args->query_debug_event.gpu_id,
3062                                 args->query_debug_event.exception_mask,
3063                                 &args->query_debug_event.exception_mask);
3064                 break;
3065         case KFD_IOC_DBG_TRAP_QUERY_EXCEPTION_INFO:
3066                 r = kfd_dbg_trap_query_exception_info(target,
3067                                 args->query_exception_info.source_id,
3068                                 args->query_exception_info.exception_code,
3069                                 args->query_exception_info.clear_exception,
3070                                 (void __user *)args->query_exception_info.info_ptr,
3071                                 &args->query_exception_info.info_size);
3072                 break;
3073         case KFD_IOC_DBG_TRAP_GET_QUEUE_SNAPSHOT:
3074                 r = pqm_get_queue_snapshot(&target->pqm,
3075                                 args->queue_snapshot.exception_mask,
3076                                 (void __user *)args->queue_snapshot.snapshot_buf_ptr,
3077                                 &args->queue_snapshot.num_queues,
3078                                 &args->queue_snapshot.entry_size);
3079                 break;
3080         case KFD_IOC_DBG_TRAP_GET_DEVICE_SNAPSHOT:
3081                 r = kfd_dbg_trap_device_snapshot(target,
3082                                 args->device_snapshot.exception_mask,
3083                                 (void __user *)args->device_snapshot.snapshot_buf_ptr,
3084                                 &args->device_snapshot.num_devices,
3085                                 &args->device_snapshot.entry_size);
3086                 break;
3087         default:
3088                 pr_err("Invalid option: %i\n", args->op);
3089                 r = -EINVAL;
3090         }
3091
3092 unlock_out:
3093         mutex_unlock(&target->mutex);
3094
3095 out:
3096         if (thread)
3097                 put_task_struct(thread);
3098
3099         if (mm)
3100                 mmput(mm);
3101
3102         if (pid)
3103                 put_pid(pid);
3104
3105         if (target)
3106                 kfd_unref_process(target);
3107
3108         return r;
3109 }
3110
3111 #define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \
3112         [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, \
3113                             .cmd_drv = 0, .name = #ioctl}
3114
3115 /** Ioctl table */
3116 static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
3117         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_VERSION,
3118                         kfd_ioctl_get_version, 0),
3119
3120         AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_QUEUE,
3121                         kfd_ioctl_create_queue, 0),
3122
3123         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_QUEUE,
3124                         kfd_ioctl_destroy_queue, 0),
3125
3126         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_MEMORY_POLICY,
3127                         kfd_ioctl_set_memory_policy, 0),
3128
3129         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_CLOCK_COUNTERS,
3130                         kfd_ioctl_get_clock_counters, 0),
3131
3132         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES,
3133                         kfd_ioctl_get_process_apertures, 0),
3134
3135         AMDKFD_IOCTL_DEF(AMDKFD_IOC_UPDATE_QUEUE,
3136                         kfd_ioctl_update_queue, 0),
3137
3138         AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_EVENT,
3139                         kfd_ioctl_create_event, 0),
3140
3141         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_EVENT,
3142                         kfd_ioctl_destroy_event, 0),
3143
3144         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_EVENT,
3145                         kfd_ioctl_set_event, 0),
3146
3147         AMDKFD_IOCTL_DEF(AMDKFD_IOC_RESET_EVENT,
3148                         kfd_ioctl_reset_event, 0),
3149
3150         AMDKFD_IOCTL_DEF(AMDKFD_IOC_WAIT_EVENTS,
3151                         kfd_ioctl_wait_events, 0),
3152
3153         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_REGISTER_DEPRECATED,
3154                         kfd_ioctl_dbg_register, 0),
3155
3156         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_UNREGISTER_DEPRECATED,
3157                         kfd_ioctl_dbg_unregister, 0),
3158
3159         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_ADDRESS_WATCH_DEPRECATED,
3160                         kfd_ioctl_dbg_address_watch, 0),
3161
3162         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_WAVE_CONTROL_DEPRECATED,
3163                         kfd_ioctl_dbg_wave_control, 0),
3164
3165         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_SCRATCH_BACKING_VA,
3166                         kfd_ioctl_set_scratch_backing_va, 0),
3167
3168         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_TILE_CONFIG,
3169                         kfd_ioctl_get_tile_config, 0),
3170
3171         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_TRAP_HANDLER,
3172                         kfd_ioctl_set_trap_handler, 0),
3173
3174         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES_NEW,
3175                         kfd_ioctl_get_process_apertures_new, 0),
3176
3177         AMDKFD_IOCTL_DEF(AMDKFD_IOC_ACQUIRE_VM,
3178                         kfd_ioctl_acquire_vm, 0),
3179
3180         AMDKFD_IOCTL_DEF(AMDKFD_IOC_ALLOC_MEMORY_OF_GPU,
3181                         kfd_ioctl_alloc_memory_of_gpu, 0),
3182
3183         AMDKFD_IOCTL_DEF(AMDKFD_IOC_FREE_MEMORY_OF_GPU,
3184                         kfd_ioctl_free_memory_of_gpu, 0),
3185
3186         AMDKFD_IOCTL_DEF(AMDKFD_IOC_MAP_MEMORY_TO_GPU,
3187                         kfd_ioctl_map_memory_to_gpu, 0),
3188
3189         AMDKFD_IOCTL_DEF(AMDKFD_IOC_UNMAP_MEMORY_FROM_GPU,
3190                         kfd_ioctl_unmap_memory_from_gpu, 0),
3191
3192         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_CU_MASK,
3193                         kfd_ioctl_set_cu_mask, 0),
3194
3195         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_QUEUE_WAVE_STATE,
3196                         kfd_ioctl_get_queue_wave_state, 0),
3197
3198         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_DMABUF_INFO,
3199                                 kfd_ioctl_get_dmabuf_info, 0),
3200
3201         AMDKFD_IOCTL_DEF(AMDKFD_IOC_IMPORT_DMABUF,
3202                                 kfd_ioctl_import_dmabuf, 0),
3203
3204         AMDKFD_IOCTL_DEF(AMDKFD_IOC_ALLOC_QUEUE_GWS,
3205                         kfd_ioctl_alloc_queue_gws, 0),
3206
3207         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SMI_EVENTS,
3208                         kfd_ioctl_smi_events, 0),
3209
3210         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SVM, kfd_ioctl_svm, 0),
3211
3212         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_XNACK_MODE,
3213                         kfd_ioctl_set_xnack_mode, 0),
3214
3215         AMDKFD_IOCTL_DEF(AMDKFD_IOC_CRIU_OP,
3216                         kfd_ioctl_criu, KFD_IOC_FLAG_CHECKPOINT_RESTORE),
3217
3218         AMDKFD_IOCTL_DEF(AMDKFD_IOC_AVAILABLE_MEMORY,
3219                         kfd_ioctl_get_available_memory, 0),
3220
3221         AMDKFD_IOCTL_DEF(AMDKFD_IOC_EXPORT_DMABUF,
3222                                 kfd_ioctl_export_dmabuf, 0),
3223
3224         AMDKFD_IOCTL_DEF(AMDKFD_IOC_RUNTIME_ENABLE,
3225                         kfd_ioctl_runtime_enable, 0),
3226
3227         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_TRAP,
3228                         kfd_ioctl_set_debug_trap, 0),
3229 };
3230
3231 #define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls)
3232
3233 static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3234 {
3235         struct kfd_process *process;
3236         amdkfd_ioctl_t *func;
3237         const struct amdkfd_ioctl_desc *ioctl = NULL;
3238         unsigned int nr = _IOC_NR(cmd);
3239         char stack_kdata[128];
3240         char *kdata = NULL;
3241         unsigned int usize, asize;
3242         int retcode = -EINVAL;
3243         bool ptrace_attached = false;
3244
3245         if (nr >= AMDKFD_CORE_IOCTL_COUNT)
3246                 goto err_i1;
3247
3248         if ((nr >= AMDKFD_COMMAND_START) && (nr < AMDKFD_COMMAND_END)) {
3249                 u32 amdkfd_size;
3250
3251                 ioctl = &amdkfd_ioctls[nr];
3252
3253                 amdkfd_size = _IOC_SIZE(ioctl->cmd);
3254                 usize = asize = _IOC_SIZE(cmd);
3255                 if (amdkfd_size > asize)
3256                         asize = amdkfd_size;
3257
3258                 cmd = ioctl->cmd;
3259         } else
3260                 goto err_i1;
3261
3262         dev_dbg(kfd_device, "ioctl cmd 0x%x (#0x%x), arg 0x%lx\n", cmd, nr, arg);
3263
3264         /* Get the process struct from the filep. Only the process
3265          * that opened /dev/kfd can use the file descriptor. Child
3266          * processes need to create their own KFD device context.
3267          */
3268         process = filep->private_data;
3269
3270         rcu_read_lock();
3271         if ((ioctl->flags & KFD_IOC_FLAG_CHECKPOINT_RESTORE) &&
3272             ptrace_parent(process->lead_thread) == current)
3273                 ptrace_attached = true;
3274         rcu_read_unlock();
3275
3276         if (process->lead_thread != current->group_leader
3277             && !ptrace_attached) {
3278                 dev_dbg(kfd_device, "Using KFD FD in wrong process\n");
3279                 retcode = -EBADF;
3280                 goto err_i1;
3281         }
3282
3283         /* Do not trust userspace, use our own definition */
3284         func = ioctl->func;
3285
3286         if (unlikely(!func)) {
3287                 dev_dbg(kfd_device, "no function\n");
3288                 retcode = -EINVAL;
3289                 goto err_i1;
3290         }
3291
3292         /*
3293          * Versions of docker shipped in Ubuntu 18.xx and 20.xx do not support
3294          * CAP_CHECKPOINT_RESTORE, so we also allow access if CAP_SYS_ADMIN as CAP_SYS_ADMIN is a
3295          * more priviledged access.
3296          */
3297         if (unlikely(ioctl->flags & KFD_IOC_FLAG_CHECKPOINT_RESTORE)) {
3298                 if (!capable(CAP_CHECKPOINT_RESTORE) &&
3299                                                 !capable(CAP_SYS_ADMIN)) {
3300                         retcode = -EACCES;
3301                         goto err_i1;
3302                 }
3303         }
3304
3305         if (cmd & (IOC_IN | IOC_OUT)) {
3306                 if (asize <= sizeof(stack_kdata)) {
3307                         kdata = stack_kdata;
3308                 } else {
3309                         kdata = kmalloc(asize, GFP_KERNEL);
3310                         if (!kdata) {
3311                                 retcode = -ENOMEM;
3312                                 goto err_i1;
3313                         }
3314                 }
3315                 if (asize > usize)
3316                         memset(kdata + usize, 0, asize - usize);
3317         }
3318
3319         if (cmd & IOC_IN) {
3320                 if (copy_from_user(kdata, (void __user *)arg, usize) != 0) {
3321                         retcode = -EFAULT;
3322                         goto err_i1;
3323                 }
3324         } else if (cmd & IOC_OUT) {
3325                 memset(kdata, 0, usize);
3326         }
3327
3328         retcode = func(filep, process, kdata);
3329
3330         if (cmd & IOC_OUT)
3331                 if (copy_to_user((void __user *)arg, kdata, usize) != 0)
3332                         retcode = -EFAULT;
3333
3334 err_i1:
3335         if (!ioctl)
3336                 dev_dbg(kfd_device, "invalid ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
3337                           task_pid_nr(current), cmd, nr);
3338
3339         if (kdata != stack_kdata)
3340                 kfree(kdata);
3341
3342         if (retcode)
3343                 dev_dbg(kfd_device, "ioctl cmd (#0x%x), arg 0x%lx, ret = %d\n",
3344                                 nr, arg, retcode);
3345
3346         return retcode;
3347 }
3348
3349 static int kfd_mmio_mmap(struct kfd_node *dev, struct kfd_process *process,
3350                       struct vm_area_struct *vma)
3351 {
3352         phys_addr_t address;
3353
3354         if (vma->vm_end - vma->vm_start != PAGE_SIZE)
3355                 return -EINVAL;
3356
3357         if (PAGE_SIZE > 4096)
3358                 return -EINVAL;
3359
3360         address = dev->adev->rmmio_remap.bus_addr;
3361
3362         vm_flags_set(vma, VM_IO | VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |
3363                                 VM_DONTDUMP | VM_PFNMAP);
3364
3365         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
3366
3367         pr_debug("pasid 0x%x mapping mmio page\n"
3368                  "     target user address == 0x%08llX\n"
3369                  "     physical address    == 0x%08llX\n"
3370                  "     vm_flags            == 0x%04lX\n"
3371                  "     size                == 0x%04lX\n",
3372                  process->pasid, (unsigned long long) vma->vm_start,
3373                  address, vma->vm_flags, PAGE_SIZE);
3374
3375         return io_remap_pfn_range(vma,
3376                                 vma->vm_start,
3377                                 address >> PAGE_SHIFT,
3378                                 PAGE_SIZE,
3379                                 vma->vm_page_prot);
3380 }
3381
3382
3383 static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
3384 {
3385         struct kfd_process *process;
3386         struct kfd_node *dev = NULL;
3387         unsigned long mmap_offset;
3388         unsigned int gpu_id;
3389
3390         process = kfd_get_process(current);
3391         if (IS_ERR(process))
3392                 return PTR_ERR(process);
3393
3394         mmap_offset = vma->vm_pgoff << PAGE_SHIFT;
3395         gpu_id = KFD_MMAP_GET_GPU_ID(mmap_offset);
3396         if (gpu_id)
3397                 dev = kfd_device_by_id(gpu_id);
3398
3399         switch (mmap_offset & KFD_MMAP_TYPE_MASK) {
3400         case KFD_MMAP_TYPE_DOORBELL:
3401                 if (!dev)
3402                         return -ENODEV;
3403                 return kfd_doorbell_mmap(dev, process, vma);
3404
3405         case KFD_MMAP_TYPE_EVENTS:
3406                 return kfd_event_mmap(process, vma);
3407
3408         case KFD_MMAP_TYPE_RESERVED_MEM:
3409                 if (!dev)
3410                         return -ENODEV;
3411                 return kfd_reserved_mem_mmap(dev, process, vma);
3412         case KFD_MMAP_TYPE_MMIO:
3413                 if (!dev)
3414                         return -ENODEV;
3415                 return kfd_mmio_mmap(dev, process, vma);
3416         }
3417
3418         return -EFAULT;
3419 }