drivers/gpu/drm/amd/amdkfd/kfd

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
kfd_chardev_init
kfd_chardev_exit
kfd_chardev
kfd_open
kfd_ioctl_get_version
set_queue_properties_from_user
kfd_ioctl_create_queue
kfd_ioctl_destroy_queue
kfd_ioctl_update_queue
kfd_ioctl_set_cu_mask
kfd_ioctl_get_queue_wave_state
kfd_ioctl_set_memory_policy
kfd_ioctl_set_trap_handler
kfd_ioctl_dbg_register
kfd_ioctl_dbg_unregister
kfd_ioctl_dbg_address_watch
kfd_ioctl_dbg_wave_control
kfd_ioctl_get_clock_counters
kfd_ioctl_get_process_apertures
kfd_ioctl_get_process_apertures_new
kfd_ioctl_create_event
kfd_ioctl_destroy_event
kfd_ioctl_set_event
kfd_ioctl_reset_event
kfd_ioctl_wait_events
kfd_ioctl_set_scratch_backing_va
kfd_ioctl_get_tile_config
kfd_ioctl_acquire_vm
kfd_dev_is_large_bar
kfd_ioctl_alloc_memory_of_gpu
kfd_ioctl_free_memory_of_gpu
kfd_ioctl_map_memory_to_gpu
kfd_ioctl_unmap_memory_from_gpu
kfd_ioctl_get_dmabuf_info
kfd_ioctl_import_dmabuf
kfd_ioctl
kfd_mmio_mmap
kfd_mmap
   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22 
  23 #include <linux/device.h>
  24 #include <linux/export.h>
  25 #include <linux/err.h>
  26 #include <linux/fs.h>
  27 #include <linux/file.h>
  28 #include <linux/sched.h>
  29 #include <linux/slab.h>
  30 #include <linux/uaccess.h>
  31 #include <linux/compat.h>
  32 #include <uapi/linux/kfd_ioctl.h>
  33 #include <linux/time.h>
  34 #include <linux/mm.h>
  35 #include <linux/mman.h>
  36 #include <linux/dma-buf.h>
  37 #include <asm/processor.h>
  38 #include "kfd_priv.h"
  39 #include "kfd_device_queue_manager.h"
  40 #include "kfd_dbgmgr.h"
  41 #include "amdgpu_amdkfd.h"
  42 
  43 static long kfd_ioctl(struct file *, unsigned int, unsigned long);
  44 static int kfd_open(struct inode *, struct file *);
  45 static int kfd_mmap(struct file *, struct vm_area_struct *);
  46 
  47 static const char kfd_dev_name[] = "kfd";
  48 
  49 static const struct file_operations kfd_fops = {
  50         .owner = THIS_MODULE,
  51         .unlocked_ioctl = kfd_ioctl,
  52         .compat_ioctl = kfd_ioctl,
  53         .open = kfd_open,
  54         .mmap = kfd_mmap,
  55 };
  56 
  57 static int kfd_char_dev_major = -1;
  58 static struct class *kfd_class;
  59 struct device *kfd_device;
  60 
  61 int kfd_chardev_init(void)
  62 {
  63         int err = 0;
  64 
  65         kfd_char_dev_major = register_chrdev(0, kfd_dev_name, &kfd_fops);
  66         err = kfd_char_dev_major;
  67         if (err < 0)
  68                 goto err_register_chrdev;
  69 
  70         kfd_class = class_create(THIS_MODULE, kfd_dev_name);
  71         err = PTR_ERR(kfd_class);
  72         if (IS_ERR(kfd_class))
  73                 goto err_class_create;
  74 
  75         kfd_device = device_create(kfd_class, NULL,
  76                                         MKDEV(kfd_char_dev_major, 0),
  77                                         NULL, kfd_dev_name);
  78         err = PTR_ERR(kfd_device);
  79         if (IS_ERR(kfd_device))
  80                 goto err_device_create;
  81 
  82         return 0;
  83 
  84 err_device_create:
  85         class_destroy(kfd_class);
  86 err_class_create:
  87         unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
  88 err_register_chrdev:
  89         return err;
  90 }
  91 
  92 void kfd_chardev_exit(void)
  93 {
  94         device_destroy(kfd_class, MKDEV(kfd_char_dev_major, 0));
  95         class_destroy(kfd_class);
  96         unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
  97 }
  98 
  99 struct device *kfd_chardev(void)
 100 {
 101         return kfd_device;
 102 }
 103 
 104 
 105 static int kfd_open(struct inode *inode, struct file *filep)
 106 {
 107         struct kfd_process *process;
 108         bool is_32bit_user_mode;
 109 
 110         if (iminor(inode) != 0)
 111                 return -ENODEV;
 112 
 113         is_32bit_user_mode = in_compat_syscall();
 114 
 115         if (is_32bit_user_mode) {
 116                 dev_warn(kfd_device,
 117                         "Process %d (32-bit) failed to open /dev/kfd\n"
 118                         "32-bit processes are not supported by amdkfd\n",
 119                         current->pid);
 120                 return -EPERM;
 121         }
 122 
 123         process = kfd_create_process(filep);
 124         if (IS_ERR(process))
 125                 return PTR_ERR(process);
 126 
 127         if (kfd_is_locked())
 128                 return -EAGAIN;
 129 
 130         dev_dbg(kfd_device, "process %d opened, compat mode (32 bit) - %d\n",
 131                 process->pasid, process->is_32bit_user_mode);
 132 
 133         return 0;
 134 }
 135 
 136 static int kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
 137                                         void *data)
 138 {
 139         struct kfd_ioctl_get_version_args *args = data;
 140 
 141         args->major_version = KFD_IOCTL_MAJOR_VERSION;
 142         args->minor_version = KFD_IOCTL_MINOR_VERSION;
 143 
 144         return 0;
 145 }
 146 
 147 static int set_queue_properties_from_user(struct queue_properties *q_properties,
 148                                 struct kfd_ioctl_create_queue_args *args)
 149 {
 150         if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
 151                 pr_err("Queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
 152                 return -EINVAL;
 153         }
 154 
 155         if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
 156                 pr_err("Queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
 157                 return -EINVAL;
 158         }
 159 
 160         if ((args->ring_base_address) &&
 161                 (!access_ok((const void __user *) args->ring_base_address,
 162                         sizeof(uint64_t)))) {
 163                 pr_err("Can't access ring base address\n");
 164                 return -EFAULT;
 165         }
 166 
 167         if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
 168                 pr_err("Ring size must be a power of 2 or 0\n");
 169                 return -EINVAL;
 170         }
 171 
 172         if (!access_ok((const void __user *) args->read_pointer_address,
 173                         sizeof(uint32_t))) {
 174                 pr_err("Can't access read pointer\n");
 175                 return -EFAULT;
 176         }
 177 
 178         if (!access_ok((const void __user *) args->write_pointer_address,
 179                         sizeof(uint32_t))) {
 180                 pr_err("Can't access write pointer\n");
 181                 return -EFAULT;
 182         }
 183 
 184         if (args->eop_buffer_address &&
 185                 !access_ok((const void __user *) args->eop_buffer_address,
 186                         sizeof(uint32_t))) {
 187                 pr_debug("Can't access eop buffer");
 188                 return -EFAULT;
 189         }
 190 
 191         if (args->ctx_save_restore_address &&
 192                 !access_ok((const void __user *) args->ctx_save_restore_address,
 193                         sizeof(uint32_t))) {
 194                 pr_debug("Can't access ctx save restore buffer");
 195                 return -EFAULT;
 196         }
 197 
 198         q_properties->is_interop = false;
 199         q_properties->queue_percent = args->queue_percentage;
 200         q_properties->priority = args->queue_priority;
 201         q_properties->queue_address = args->ring_base_address;
 202         q_properties->queue_size = args->ring_size;
 203         q_properties->read_ptr = (uint32_t *) args->read_pointer_address;
 204         q_properties->write_ptr = (uint32_t *) args->write_pointer_address;
 205         q_properties->eop_ring_buffer_address = args->eop_buffer_address;
 206         q_properties->eop_ring_buffer_size = args->eop_buffer_size;
 207         q_properties->ctx_save_restore_area_address =
 208                         args->ctx_save_restore_address;
 209         q_properties->ctx_save_restore_area_size = args->ctx_save_restore_size;
 210         q_properties->ctl_stack_size = args->ctl_stack_size;
 211         if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE ||
 212                 args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
 213                 q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
 214         else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA)
 215                 q_properties->type = KFD_QUEUE_TYPE_SDMA;
 216         else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA_XGMI)
 217                 q_properties->type = KFD_QUEUE_TYPE_SDMA_XGMI;
 218         else
 219                 return -ENOTSUPP;
 220 
 221         if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
 222                 q_properties->format = KFD_QUEUE_FORMAT_AQL;
 223         else
 224                 q_properties->format = KFD_QUEUE_FORMAT_PM4;
 225 
 226         pr_debug("Queue Percentage: %d, %d\n",
 227                         q_properties->queue_percent, args->queue_percentage);
 228 
 229         pr_debug("Queue Priority: %d, %d\n",
 230                         q_properties->priority, args->queue_priority);
 231 
 232         pr_debug("Queue Address: 0x%llX, 0x%llX\n",
 233                         q_properties->queue_address, args->ring_base_address);
 234 
 235         pr_debug("Queue Size: 0x%llX, %u\n",
 236                         q_properties->queue_size, args->ring_size);
 237 
 238         pr_debug("Queue r/w Pointers: %px, %px\n",
 239                         q_properties->read_ptr,
 240                         q_properties->write_ptr);
 241 
 242         pr_debug("Queue Format: %d\n", q_properties->format);
 243 
 244         pr_debug("Queue EOP: 0x%llX\n", q_properties->eop_ring_buffer_address);
 245 
 246         pr_debug("Queue CTX save area: 0x%llX\n",
 247                         q_properties->ctx_save_restore_area_address);
 248 
 249         return 0;
 250 }
 251 
 252 static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
 253                                         void *data)
 254 {
 255         struct kfd_ioctl_create_queue_args *args = data;
 256         struct kfd_dev *dev;
 257         int err = 0;
 258         unsigned int queue_id;
 259         struct kfd_process_device *pdd;
 260         struct queue_properties q_properties;
 261 
 262         memset(&q_properties, 0, sizeof(struct queue_properties));
 263 
 264         pr_debug("Creating queue ioctl\n");
 265 
 266         err = set_queue_properties_from_user(&q_properties, args);
 267         if (err)
 268                 return err;
 269 
 270         pr_debug("Looking for gpu id 0x%x\n", args->gpu_id);
 271         dev = kfd_device_by_id(args->gpu_id);
 272         if (!dev) {
 273                 pr_debug("Could not find gpu id 0x%x\n", args->gpu_id);
 274                 return -EINVAL;
 275         }
 276 
 277         mutex_lock(&p->mutex);
 278 
 279         pdd = kfd_bind_process_to_device(dev, p);
 280         if (IS_ERR(pdd)) {
 281                 err = -ESRCH;
 282                 goto err_bind_process;
 283         }
 284 
 285         pr_debug("Creating queue for PASID %d on gpu 0x%x\n",
 286                         p->pasid,
 287                         dev->id);
 288 
 289         err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, &queue_id);
 290         if (err != 0)
 291                 goto err_create_queue;
 292 
 293         args->queue_id = queue_id;
 294 
 295 
 296         /* Return gpu_id as doorbell offset for mmap usage */
 297         args->doorbell_offset = KFD_MMAP_TYPE_DOORBELL;
 298         args->doorbell_offset |= KFD_MMAP_GPU_ID(args->gpu_id);
 299         args->doorbell_offset <<= PAGE_SHIFT;
 300         if (KFD_IS_SOC15(dev->device_info->asic_family))
 301                 /* On SOC15 ASICs, doorbell allocation must be
 302                  * per-device, and independent from the per-process
 303                  * queue_id. Return the doorbell offset within the
 304                  * doorbell aperture to user mode.
 305                  */
 306                 args->doorbell_offset |= q_properties.doorbell_off;
 307 
 308         mutex_unlock(&p->mutex);
 309 
 310         pr_debug("Queue id %d was created successfully\n", args->queue_id);
 311 
 312         pr_debug("Ring buffer address == 0x%016llX\n",
 313                         args->ring_base_address);
 314 
 315         pr_debug("Read ptr address    == 0x%016llX\n",
 316                         args->read_pointer_address);
 317 
 318         pr_debug("Write ptr address   == 0x%016llX\n",
 319                         args->write_pointer_address);
 320 
 321         return 0;
 322 
 323 err_create_queue:
 324 err_bind_process:
 325         mutex_unlock(&p->mutex);
 326         return err;
 327 }
 328 
 329 static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p,
 330                                         void *data)
 331 {
 332         int retval;
 333         struct kfd_ioctl_destroy_queue_args *args = data;
 334 
 335         pr_debug("Destroying queue id %d for pasid %d\n",
 336                                 args->queue_id,
 337                                 p->pasid);
 338 
 339         mutex_lock(&p->mutex);
 340 
 341         retval = pqm_destroy_queue(&p->pqm, args->queue_id);
 342 
 343         mutex_unlock(&p->mutex);
 344         return retval;
 345 }
 346 
 347 static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p,
 348                                         void *data)
 349 {
 350         int retval;
 351         struct kfd_ioctl_update_queue_args *args = data;
 352         struct queue_properties properties;
 353 
 354         if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
 355                 pr_err("Queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
 356                 return -EINVAL;
 357         }
 358 
 359         if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
 360                 pr_err("Queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
 361                 return -EINVAL;
 362         }
 363 
 364         if ((args->ring_base_address) &&
 365                 (!access_ok((const void __user *) args->ring_base_address,
 366                         sizeof(uint64_t)))) {
 367                 pr_err("Can't access ring base address\n");
 368                 return -EFAULT;
 369         }
 370 
 371         if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
 372                 pr_err("Ring size must be a power of 2 or 0\n");
 373                 return -EINVAL;
 374         }
 375 
 376         properties.queue_address = args->ring_base_address;
 377         properties.queue_size = args->ring_size;
 378         properties.queue_percent = args->queue_percentage;
 379         properties.priority = args->queue_priority;
 380 
 381         pr_debug("Updating queue id %d for pasid %d\n",
 382                         args->queue_id, p->pasid);
 383 
 384         mutex_lock(&p->mutex);
 385 
 386         retval = pqm_update_queue(&p->pqm, args->queue_id, &properties);
 387 
 388         mutex_unlock(&p->mutex);
 389 
 390         return retval;
 391 }
 392 
 393 static int kfd_ioctl_set_cu_mask(struct file *filp, struct kfd_process *p,
 394                                         void *data)
 395 {
 396         int retval;
 397         const int max_num_cus = 1024;
 398         struct kfd_ioctl_set_cu_mask_args *args = data;
 399         struct queue_properties properties;
 400         uint32_t __user *cu_mask_ptr = (uint32_t __user *)args->cu_mask_ptr;
 401         size_t cu_mask_size = sizeof(uint32_t) * (args->num_cu_mask / 32);
 402 
 403         if ((args->num_cu_mask % 32) != 0) {
 404                 pr_debug("num_cu_mask 0x%x must be a multiple of 32",
 405                                 args->num_cu_mask);
 406                 return -EINVAL;
 407         }
 408 
 409         properties.cu_mask_count = args->num_cu_mask;
 410         if (properties.cu_mask_count == 0) {
 411                 pr_debug("CU mask cannot be 0");
 412                 return -EINVAL;
 413         }
 414 
 415         /* To prevent an unreasonably large CU mask size, set an arbitrary
 416          * limit of max_num_cus bits.  We can then just drop any CU mask bits
 417          * past max_num_cus bits and just use the first max_num_cus bits.
 418          */
 419         if (properties.cu_mask_count > max_num_cus) {
 420                 pr_debug("CU mask cannot be greater than 1024 bits");
 421                 properties.cu_mask_count = max_num_cus;
 422                 cu_mask_size = sizeof(uint32_t) * (max_num_cus/32);
 423         }
 424 
 425         properties.cu_mask = kzalloc(cu_mask_size, GFP_KERNEL);
 426         if (!properties.cu_mask)
 427                 return -ENOMEM;
 428 
 429         retval = copy_from_user(properties.cu_mask, cu_mask_ptr, cu_mask_size);
 430         if (retval) {
 431                 pr_debug("Could not copy CU mask from userspace");
 432                 kfree(properties.cu_mask);
 433                 return -EFAULT;
 434         }
 435 
 436         mutex_lock(&p->mutex);
 437 
 438         retval = pqm_set_cu_mask(&p->pqm, args->queue_id, &properties);
 439 
 440         mutex_unlock(&p->mutex);
 441 
 442         if (retval)
 443                 kfree(properties.cu_mask);
 444 
 445         return retval;
 446 }
 447 
 448 static int kfd_ioctl_get_queue_wave_state(struct file *filep,
 449                                           struct kfd_process *p, void *data)
 450 {
 451         struct kfd_ioctl_get_queue_wave_state_args *args = data;
 452         int r;
 453 
 454         mutex_lock(&p->mutex);
 455 
 456         r = pqm_get_wave_state(&p->pqm, args->queue_id,
 457                                (void __user *)args->ctl_stack_address,
 458                                &args->ctl_stack_used_size,
 459                                &args->save_area_used_size);
 460 
 461         mutex_unlock(&p->mutex);
 462 
 463         return r;
 464 }
 465 
 466 static int kfd_ioctl_set_memory_policy(struct file *filep,
 467                                         struct kfd_process *p, void *data)
 468 {
 469         struct kfd_ioctl_set_memory_policy_args *args = data;
 470         struct kfd_dev *dev;
 471         int err = 0;
 472         struct kfd_process_device *pdd;
 473         enum cache_policy default_policy, alternate_policy;
 474 
 475         if (args->default_policy != KFD_IOC_CACHE_POLICY_COHERENT
 476             && args->default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
 477                 return -EINVAL;
 478         }
 479 
 480         if (args->alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
 481             && args->alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
 482                 return -EINVAL;
 483         }
 484 
 485         dev = kfd_device_by_id(args->gpu_id);
 486         if (!dev)
 487                 return -EINVAL;
 488 
 489         mutex_lock(&p->mutex);
 490 
 491         pdd = kfd_bind_process_to_device(dev, p);
 492         if (IS_ERR(pdd)) {
 493                 err = -ESRCH;
 494                 goto out;
 495         }
 496 
 497         default_policy = (args->default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
 498                          ? cache_policy_coherent : cache_policy_noncoherent;
 499 
 500         alternate_policy =
 501                 (args->alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
 502                    ? cache_policy_coherent : cache_policy_noncoherent;
 503 
 504         if (!dev->dqm->ops.set_cache_memory_policy(dev->dqm,
 505                                 &pdd->qpd,
 506                                 default_policy,
 507                                 alternate_policy,
 508                                 (void __user *)args->alternate_aperture_base,
 509                                 args->alternate_aperture_size))
 510                 err = -EINVAL;
 511 
 512 out:
 513         mutex_unlock(&p->mutex);
 514 
 515         return err;
 516 }
 517 
 518 static int kfd_ioctl_set_trap_handler(struct file *filep,
 519                                         struct kfd_process *p, void *data)
 520 {
 521         struct kfd_ioctl_set_trap_handler_args *args = data;
 522         struct kfd_dev *dev;
 523         int err = 0;
 524         struct kfd_process_device *pdd;
 525 
 526         dev = kfd_device_by_id(args->gpu_id);
 527         if (!dev)
 528                 return -EINVAL;
 529 
 530         mutex_lock(&p->mutex);
 531 
 532         pdd = kfd_bind_process_to_device(dev, p);
 533         if (IS_ERR(pdd)) {
 534                 err = -ESRCH;
 535                 goto out;
 536         }
 537 
 538         if (dev->dqm->ops.set_trap_handler(dev->dqm,
 539                                         &pdd->qpd,
 540                                         args->tba_addr,
 541                                         args->tma_addr))
 542                 err = -EINVAL;
 543 
 544 out:
 545         mutex_unlock(&p->mutex);
 546 
 547         return err;
 548 }
 549 
 550 static int kfd_ioctl_dbg_register(struct file *filep,
 551                                 struct kfd_process *p, void *data)
 552 {
 553         struct kfd_ioctl_dbg_register_args *args = data;
 554         struct kfd_dev *dev;
 555         struct kfd_dbgmgr *dbgmgr_ptr;
 556         struct kfd_process_device *pdd;
 557         bool create_ok;
 558         long status = 0;
 559 
 560         dev = kfd_device_by_id(args->gpu_id);
 561         if (!dev)
 562                 return -EINVAL;
 563 
 564         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 565                 pr_debug("kfd_ioctl_dbg_register not supported on CZ\n");
 566                 return -EINVAL;
 567         }
 568 
 569         mutex_lock(&p->mutex);
 570         mutex_lock(kfd_get_dbgmgr_mutex());
 571 
 572         /*
 573          * make sure that we have pdd, if this the first queue created for
 574          * this process
 575          */
 576         pdd = kfd_bind_process_to_device(dev, p);
 577         if (IS_ERR(pdd)) {
 578                 status = PTR_ERR(pdd);
 579                 goto out;
 580         }
 581 
 582         if (!dev->dbgmgr) {
 583                 /* In case of a legal call, we have no dbgmgr yet */
 584                 create_ok = kfd_dbgmgr_create(&dbgmgr_ptr, dev);
 585                 if (create_ok) {
 586                         status = kfd_dbgmgr_register(dbgmgr_ptr, p);
 587                         if (status != 0)
 588                                 kfd_dbgmgr_destroy(dbgmgr_ptr);
 589                         else
 590                                 dev->dbgmgr = dbgmgr_ptr;
 591                 }
 592         } else {
 593                 pr_debug("debugger already registered\n");
 594                 status = -EINVAL;
 595         }
 596 
 597 out:
 598         mutex_unlock(kfd_get_dbgmgr_mutex());
 599         mutex_unlock(&p->mutex);
 600 
 601         return status;
 602 }
 603 
 604 static int kfd_ioctl_dbg_unregister(struct file *filep,
 605                                 struct kfd_process *p, void *data)
 606 {
 607         struct kfd_ioctl_dbg_unregister_args *args = data;
 608         struct kfd_dev *dev;
 609         long status;
 610 
 611         dev = kfd_device_by_id(args->gpu_id);
 612         if (!dev || !dev->dbgmgr)
 613                 return -EINVAL;
 614 
 615         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 616                 pr_debug("kfd_ioctl_dbg_unregister not supported on CZ\n");
 617                 return -EINVAL;
 618         }
 619 
 620         mutex_lock(kfd_get_dbgmgr_mutex());
 621 
 622         status = kfd_dbgmgr_unregister(dev->dbgmgr, p);
 623         if (!status) {
 624                 kfd_dbgmgr_destroy(dev->dbgmgr);
 625                 dev->dbgmgr = NULL;
 626         }
 627 
 628         mutex_unlock(kfd_get_dbgmgr_mutex());
 629 
 630         return status;
 631 }
 632 
 633 /*
 634  * Parse and generate variable size data structure for address watch.
 635  * Total size of the buffer and # watch points is limited in order
 636  * to prevent kernel abuse. (no bearing to the much smaller HW limitation
 637  * which is enforced by dbgdev module)
 638  * please also note that the watch address itself are not "copied from user",
 639  * since it be set into the HW in user mode values.
 640  *
 641  */
 642 static int kfd_ioctl_dbg_address_watch(struct file *filep,
 643                                         struct kfd_process *p, void *data)
 644 {
 645         struct kfd_ioctl_dbg_address_watch_args *args = data;
 646         struct kfd_dev *dev;
 647         struct dbg_address_watch_info aw_info;
 648         unsigned char *args_buff;
 649         long status;
 650         void __user *cmd_from_user;
 651         uint64_t watch_mask_value = 0;
 652         unsigned int args_idx = 0;
 653 
 654         memset((void *) &aw_info, 0, sizeof(struct dbg_address_watch_info));
 655 
 656         dev = kfd_device_by_id(args->gpu_id);
 657         if (!dev)
 658                 return -EINVAL;
 659 
 660         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 661                 pr_debug("kfd_ioctl_dbg_wave_control not supported on CZ\n");
 662                 return -EINVAL;
 663         }
 664 
 665         cmd_from_user = (void __user *) args->content_ptr;
 666 
 667         /* Validate arguments */
 668 
 669         if ((args->buf_size_in_bytes > MAX_ALLOWED_AW_BUFF_SIZE) ||
 670                 (args->buf_size_in_bytes <= sizeof(*args) + sizeof(int) * 2) ||
 671                 (cmd_from_user == NULL))
 672                 return -EINVAL;
 673 
 674         /* this is the actual buffer to work with */
 675         args_buff = memdup_user(cmd_from_user,
 676                                 args->buf_size_in_bytes - sizeof(*args));
 677         if (IS_ERR(args_buff))
 678                 return PTR_ERR(args_buff);
 679 
 680         aw_info.process = p;
 681 
 682         aw_info.num_watch_points = *((uint32_t *)(&args_buff[args_idx]));
 683         args_idx += sizeof(aw_info.num_watch_points);
 684 
 685         aw_info.watch_mode = (enum HSA_DBG_WATCH_MODE *) &args_buff[args_idx];
 686         args_idx += sizeof(enum HSA_DBG_WATCH_MODE) * aw_info.num_watch_points;
 687 
 688         /*
 689          * set watch address base pointer to point on the array base
 690          * within args_buff
 691          */
 692         aw_info.watch_address = (uint64_t *) &args_buff[args_idx];
 693 
 694         /* skip over the addresses buffer */
 695         args_idx += sizeof(aw_info.watch_address) * aw_info.num_watch_points;
 696 
 697         if (args_idx >= args->buf_size_in_bytes - sizeof(*args)) {
 698                 status = -EINVAL;
 699                 goto out;
 700         }
 701 
 702         watch_mask_value = (uint64_t) args_buff[args_idx];
 703 
 704         if (watch_mask_value > 0) {
 705                 /*
 706                  * There is an array of masks.
 707                  * set watch mask base pointer to point on the array base
 708                  * within args_buff
 709                  */
 710                 aw_info.watch_mask = (uint64_t *) &args_buff[args_idx];
 711 
 712                 /* skip over the masks buffer */
 713                 args_idx += sizeof(aw_info.watch_mask) *
 714                                 aw_info.num_watch_points;
 715         } else {
 716                 /* just the NULL mask, set to NULL and skip over it */
 717                 aw_info.watch_mask = NULL;
 718                 args_idx += sizeof(aw_info.watch_mask);
 719         }
 720 
 721         if (args_idx >= args->buf_size_in_bytes - sizeof(args)) {
 722                 status = -EINVAL;
 723                 goto out;
 724         }
 725 
 726         /* Currently HSA Event is not supported for DBG */
 727         aw_info.watch_event = NULL;
 728 
 729         mutex_lock(kfd_get_dbgmgr_mutex());
 730 
 731         status = kfd_dbgmgr_address_watch(dev->dbgmgr, &aw_info);
 732 
 733         mutex_unlock(kfd_get_dbgmgr_mutex());
 734 
 735 out:
 736         kfree(args_buff);
 737 
 738         return status;
 739 }
 740 
 741 /* Parse and generate fixed size data structure for wave control */
 742 static int kfd_ioctl_dbg_wave_control(struct file *filep,
 743                                         struct kfd_process *p, void *data)
 744 {
 745         struct kfd_ioctl_dbg_wave_control_args *args = data;
 746         struct kfd_dev *dev;
 747         struct dbg_wave_control_info wac_info;
 748         unsigned char *args_buff;
 749         uint32_t computed_buff_size;
 750         long status;
 751         void __user *cmd_from_user;
 752         unsigned int args_idx = 0;
 753 
 754         memset((void *) &wac_info, 0, sizeof(struct dbg_wave_control_info));
 755 
 756         /* we use compact form, independent of the packing attribute value */
 757         computed_buff_size = sizeof(*args) +
 758                                 sizeof(wac_info.mode) +
 759                                 sizeof(wac_info.operand) +
 760                                 sizeof(wac_info.dbgWave_msg.DbgWaveMsg) +
 761                                 sizeof(wac_info.dbgWave_msg.MemoryVA) +
 762                                 sizeof(wac_info.trapId);
 763 
 764         dev = kfd_device_by_id(args->gpu_id);
 765         if (!dev)
 766                 return -EINVAL;
 767 
 768         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 769                 pr_debug("kfd_ioctl_dbg_wave_control not supported on CZ\n");
 770                 return -EINVAL;
 771         }
 772 
 773         /* input size must match the computed "compact" size */
 774         if (args->buf_size_in_bytes != computed_buff_size) {
 775                 pr_debug("size mismatch, computed : actual %u : %u\n",
 776                                 args->buf_size_in_bytes, computed_buff_size);
 777                 return -EINVAL;
 778         }
 779 
 780         cmd_from_user = (void __user *) args->content_ptr;
 781 
 782         if (cmd_from_user == NULL)
 783                 return -EINVAL;
 784 
 785         /* copy the entire buffer from user */
 786 
 787         args_buff = memdup_user(cmd_from_user,
 788                                 args->buf_size_in_bytes - sizeof(*args));
 789         if (IS_ERR(args_buff))
 790                 return PTR_ERR(args_buff);
 791 
 792         /* move ptr to the start of the "pay-load" area */
 793         wac_info.process = p;
 794 
 795         wac_info.operand = *((enum HSA_DBG_WAVEOP *)(&args_buff[args_idx]));
 796         args_idx += sizeof(wac_info.operand);
 797 
 798         wac_info.mode = *((enum HSA_DBG_WAVEMODE *)(&args_buff[args_idx]));
 799         args_idx += sizeof(wac_info.mode);
 800 
 801         wac_info.trapId = *((uint32_t *)(&args_buff[args_idx]));
 802         args_idx += sizeof(wac_info.trapId);
 803 
 804         wac_info.dbgWave_msg.DbgWaveMsg.WaveMsgInfoGen2.Value =
 805                                         *((uint32_t *)(&args_buff[args_idx]));
 806         wac_info.dbgWave_msg.MemoryVA = NULL;
 807 
 808         mutex_lock(kfd_get_dbgmgr_mutex());
 809 
 810         pr_debug("Calling dbg manager process %p, operand %u, mode %u, trapId %u, message %u\n",
 811                         wac_info.process, wac_info.operand,
 812                         wac_info.mode, wac_info.trapId,
 813                         wac_info.dbgWave_msg.DbgWaveMsg.WaveMsgInfoGen2.Value);
 814 
 815         status = kfd_dbgmgr_wave_control(dev->dbgmgr, &wac_info);
 816 
 817         pr_debug("Returned status of dbg manager is %ld\n", status);
 818 
 819         mutex_unlock(kfd_get_dbgmgr_mutex());
 820 
 821         kfree(args_buff);
 822 
 823         return status;
 824 }
 825 
 826 static int kfd_ioctl_get_clock_counters(struct file *filep,
 827                                 struct kfd_process *p, void *data)
 828 {
 829         struct kfd_ioctl_get_clock_counters_args *args = data;
 830         struct kfd_dev *dev;
 831 
 832         dev = kfd_device_by_id(args->gpu_id);
 833         if (dev)
 834                 /* Reading GPU clock counter from KGD */
 835                 args->gpu_clock_counter = amdgpu_amdkfd_get_gpu_clock_counter(dev->kgd);
 836         else
 837                 /* Node without GPU resource */
 838                 args->gpu_clock_counter = 0;
 839 
 840         /* No access to rdtsc. Using raw monotonic time */
 841         args->cpu_clock_counter = ktime_get_raw_ns();
 842         args->system_clock_counter = ktime_get_boottime_ns();
 843 
 844         /* Since the counter is in nano-seconds we use 1GHz frequency */
 845         args->system_clock_freq = 1000000000;
 846 
 847         return 0;
 848 }
 849 
 850 
 851 static int kfd_ioctl_get_process_apertures(struct file *filp,
 852                                 struct kfd_process *p, void *data)
 853 {
 854         struct kfd_ioctl_get_process_apertures_args *args = data;
 855         struct kfd_process_device_apertures *pAperture;
 856         struct kfd_process_device *pdd;
 857 
 858         dev_dbg(kfd_device, "get apertures for PASID %d", p->pasid);
 859 
 860         args->num_of_nodes = 0;
 861 
 862         mutex_lock(&p->mutex);
 863 
 864         /*if the process-device list isn't empty*/
 865         if (kfd_has_process_device_data(p)) {
 866                 /* Run over all pdd of the process */
 867                 pdd = kfd_get_first_process_device_data(p);
 868                 do {
 869                         pAperture =
 870                                 &args->process_apertures[args->num_of_nodes];
 871                         pAperture->gpu_id = pdd->dev->id;
 872                         pAperture->lds_base = pdd->lds_base;
 873                         pAperture->lds_limit = pdd->lds_limit;
 874                         pAperture->gpuvm_base = pdd->gpuvm_base;
 875                         pAperture->gpuvm_limit = pdd->gpuvm_limit;
 876                         pAperture->scratch_base = pdd->scratch_base;
 877                         pAperture->scratch_limit = pdd->scratch_limit;
 878 
 879                         dev_dbg(kfd_device,
 880                                 "node id %u\n", args->num_of_nodes);
 881                         dev_dbg(kfd_device,
 882                                 "gpu id %u\n", pdd->dev->id);
 883                         dev_dbg(kfd_device,
 884                                 "lds_base %llX\n", pdd->lds_base);
 885                         dev_dbg(kfd_device,
 886                                 "lds_limit %llX\n", pdd->lds_limit);
 887                         dev_dbg(kfd_device,
 888                                 "gpuvm_base %llX\n", pdd->gpuvm_base);
 889                         dev_dbg(kfd_device,
 890                                 "gpuvm_limit %llX\n", pdd->gpuvm_limit);
 891                         dev_dbg(kfd_device,
 892                                 "scratch_base %llX\n", pdd->scratch_base);
 893                         dev_dbg(kfd_device,
 894                                 "scratch_limit %llX\n", pdd->scratch_limit);
 895 
 896                         args->num_of_nodes++;
 897 
 898                         pdd = kfd_get_next_process_device_data(p, pdd);
 899                 } while (pdd && (args->num_of_nodes < NUM_OF_SUPPORTED_GPUS));
 900         }
 901 
 902         mutex_unlock(&p->mutex);
 903 
 904         return 0;
 905 }
 906 
 907 static int kfd_ioctl_get_process_apertures_new(struct file *filp,
 908                                 struct kfd_process *p, void *data)
 909 {
 910         struct kfd_ioctl_get_process_apertures_new_args *args = data;
 911         struct kfd_process_device_apertures *pa;
 912         struct kfd_process_device *pdd;
 913         uint32_t nodes = 0;
 914         int ret;
 915 
 916         dev_dbg(kfd_device, "get apertures for PASID %d", p->pasid);
 917 
 918         if (args->num_of_nodes == 0) {
 919                 /* Return number of nodes, so that user space can alloacate
 920                  * sufficient memory
 921                  */
 922                 mutex_lock(&p->mutex);
 923 
 924                 if (!kfd_has_process_device_data(p))
 925                         goto out_unlock;
 926 
 927                 /* Run over all pdd of the process */
 928                 pdd = kfd_get_first_process_device_data(p);
 929                 do {
 930                         args->num_of_nodes++;
 931                         pdd = kfd_get_next_process_device_data(p, pdd);
 932                 } while (pdd);
 933 
 934                 goto out_unlock;
 935         }
 936 
 937         /* Fill in process-aperture information for all available
 938          * nodes, but not more than args->num_of_nodes as that is
 939          * the amount of memory allocated by user
 940          */
 941         pa = kzalloc((sizeof(struct kfd_process_device_apertures) *
 942                                 args->num_of_nodes), GFP_KERNEL);
 943         if (!pa)
 944                 return -ENOMEM;
 945 
 946         mutex_lock(&p->mutex);
 947 
 948         if (!kfd_has_process_device_data(p)) {
 949                 args->num_of_nodes = 0;
 950                 kfree(pa);
 951                 goto out_unlock;
 952         }
 953 
 954         /* Run over all pdd of the process */
 955         pdd = kfd_get_first_process_device_data(p);
 956         do {
 957                 pa[nodes].gpu_id = pdd->dev->id;
 958                 pa[nodes].lds_base = pdd->lds_base;
 959                 pa[nodes].lds_limit = pdd->lds_limit;
 960                 pa[nodes].gpuvm_base = pdd->gpuvm_base;
 961                 pa[nodes].gpuvm_limit = pdd->gpuvm_limit;
 962                 pa[nodes].scratch_base = pdd->scratch_base;
 963                 pa[nodes].scratch_limit = pdd->scratch_limit;
 964 
 965                 dev_dbg(kfd_device,
 966                         "gpu id %u\n", pdd->dev->id);
 967                 dev_dbg(kfd_device,
 968                         "lds_base %llX\n", pdd->lds_base);
 969                 dev_dbg(kfd_device,
 970                         "lds_limit %llX\n", pdd->lds_limit);
 971                 dev_dbg(kfd_device,
 972                         "gpuvm_base %llX\n", pdd->gpuvm_base);
 973                 dev_dbg(kfd_device,
 974                         "gpuvm_limit %llX\n", pdd->gpuvm_limit);
 975                 dev_dbg(kfd_device,
 976                         "scratch_base %llX\n", pdd->scratch_base);
 977                 dev_dbg(kfd_device,
 978                         "scratch_limit %llX\n", pdd->scratch_limit);
 979                 nodes++;
 980 
 981                 pdd = kfd_get_next_process_device_data(p, pdd);
 982         } while (pdd && (nodes < args->num_of_nodes));
 983         mutex_unlock(&p->mutex);
 984 
 985         args->num_of_nodes = nodes;
 986         ret = copy_to_user(
 987                         (void __user *)args->kfd_process_device_apertures_ptr,
 988                         pa,
 989                         (nodes * sizeof(struct kfd_process_device_apertures)));
 990         kfree(pa);
 991         return ret ? -EFAULT : 0;
 992 
 993 out_unlock:
 994         mutex_unlock(&p->mutex);
 995         return 0;
 996 }
 997 
 998 static int kfd_ioctl_create_event(struct file *filp, struct kfd_process *p,
 999                                         void *data)
1000 {
1001         struct kfd_ioctl_create_event_args *args = data;
1002         int err;
1003 
1004         /* For dGPUs the event page is allocated in user mode. The
1005          * handle is passed to KFD with the first call to this IOCTL
1006          * through the event_page_offset field.
1007          */
1008         if (args->event_page_offset) {
1009                 struct kfd_dev *kfd;
1010                 struct kfd_process_device *pdd;
1011                 void *mem, *kern_addr;
1012                 uint64_t size;
1013 
1014                 if (p->signal_page) {
1015                         pr_err("Event page is already set\n");
1016                         return -EINVAL;
1017                 }
1018 
1019                 kfd = kfd_device_by_id(GET_GPU_ID(args->event_page_offset));
1020                 if (!kfd) {
1021                         pr_err("Getting device by id failed in %s\n", __func__);
1022                         return -EINVAL;
1023                 }
1024 
1025                 mutex_lock(&p->mutex);
1026                 pdd = kfd_bind_process_to_device(kfd, p);
1027                 if (IS_ERR(pdd)) {
1028                         err = PTR_ERR(pdd);
1029                         goto out_unlock;
1030                 }
1031 
1032                 mem = kfd_process_device_translate_handle(pdd,
1033                                 GET_IDR_HANDLE(args->event_page_offset));
1034                 if (!mem) {
1035                         pr_err("Can't find BO, offset is 0x%llx\n",
1036                                args->event_page_offset);
1037                         err = -EINVAL;
1038                         goto out_unlock;
1039                 }
1040                 mutex_unlock(&p->mutex);
1041 
1042                 err = amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(kfd->kgd,
1043                                                 mem, &kern_addr, &size);
1044                 if (err) {
1045                         pr_err("Failed to map event page to kernel\n");
1046                         return err;
1047                 }
1048 
1049                 err = kfd_event_page_set(p, kern_addr, size);
1050                 if (err) {
1051                         pr_err("Failed to set event page\n");
1052                         return err;
1053                 }
1054         }
1055 
1056         err = kfd_event_create(filp, p, args->event_type,
1057                                 args->auto_reset != 0, args->node_id,
1058                                 &args->event_id, &args->event_trigger_data,
1059                                 &args->event_page_offset,
1060                                 &args->event_slot_index);
1061 
1062         return err;
1063 
1064 out_unlock:
1065         mutex_unlock(&p->mutex);
1066         return err;
1067 }
1068 
1069 static int kfd_ioctl_destroy_event(struct file *filp, struct kfd_process *p,
1070                                         void *data)
1071 {
1072         struct kfd_ioctl_destroy_event_args *args = data;
1073 
1074         return kfd_event_destroy(p, args->event_id);
1075 }
1076 
1077 static int kfd_ioctl_set_event(struct file *filp, struct kfd_process *p,
1078                                 void *data)
1079 {
1080         struct kfd_ioctl_set_event_args *args = data;
1081 
1082         return kfd_set_event(p, args->event_id);
1083 }
1084 
1085 static int kfd_ioctl_reset_event(struct file *filp, struct kfd_process *p,
1086                                 void *data)
1087 {
1088         struct kfd_ioctl_reset_event_args *args = data;
1089 
1090         return kfd_reset_event(p, args->event_id);
1091 }
1092 
1093 static int kfd_ioctl_wait_events(struct file *filp, struct kfd_process *p,
1094                                 void *data)
1095 {
1096         struct kfd_ioctl_wait_events_args *args = data;
1097         int err;
1098 
1099         err = kfd_wait_on_events(p, args->num_events,
1100                         (void __user *)args->events_ptr,
1101                         (args->wait_for_all != 0),
1102                         args->timeout, &args->wait_result);
1103 
1104         return err;
1105 }
1106 static int kfd_ioctl_set_scratch_backing_va(struct file *filep,
1107                                         struct kfd_process *p, void *data)
1108 {
1109         struct kfd_ioctl_set_scratch_backing_va_args *args = data;
1110         struct kfd_process_device *pdd;
1111         struct kfd_dev *dev;
1112         long err;
1113 
1114         dev = kfd_device_by_id(args->gpu_id);
1115         if (!dev)
1116                 return -EINVAL;
1117 
1118         mutex_lock(&p->mutex);
1119 
1120         pdd = kfd_bind_process_to_device(dev, p);
1121         if (IS_ERR(pdd)) {
1122                 err = PTR_ERR(pdd);
1123                 goto bind_process_to_device_fail;
1124         }
1125 
1126         pdd->qpd.sh_hidden_private_base = args->va_addr;
1127 
1128         mutex_unlock(&p->mutex);
1129 
1130         if (dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS &&
1131             pdd->qpd.vmid != 0)
1132                 dev->kfd2kgd->set_scratch_backing_va(
1133                         dev->kgd, args->va_addr, pdd->qpd.vmid);
1134 
1135         return 0;
1136 
1137 bind_process_to_device_fail:
1138         mutex_unlock(&p->mutex);
1139         return err;
1140 }
1141 
1142 static int kfd_ioctl_get_tile_config(struct file *filep,
1143                 struct kfd_process *p, void *data)
1144 {
1145         struct kfd_ioctl_get_tile_config_args *args = data;
1146         struct kfd_dev *dev;
1147         struct tile_config config;
1148         int err = 0;
1149 
1150         dev = kfd_device_by_id(args->gpu_id);
1151         if (!dev)
1152                 return -EINVAL;
1153 
1154         dev->kfd2kgd->get_tile_config(dev->kgd, &config);
1155 
1156         args->gb_addr_config = config.gb_addr_config;
1157         args->num_banks = config.num_banks;
1158         args->num_ranks = config.num_ranks;
1159 
1160         if (args->num_tile_configs > config.num_tile_configs)
1161                 args->num_tile_configs = config.num_tile_configs;
1162         err = copy_to_user((void __user *)args->tile_config_ptr,
1163                         config.tile_config_ptr,
1164                         args->num_tile_configs * sizeof(uint32_t));
1165         if (err) {
1166                 args->num_tile_configs = 0;
1167                 return -EFAULT;
1168         }
1169 
1170         if (args->num_macro_tile_configs > config.num_macro_tile_configs)
1171                 args->num_macro_tile_configs =
1172                                 config.num_macro_tile_configs;
1173         err = copy_to_user((void __user *)args->macro_tile_config_ptr,
1174                         config.macro_tile_config_ptr,
1175                         args->num_macro_tile_configs * sizeof(uint32_t));
1176         if (err) {
1177                 args->num_macro_tile_configs = 0;
1178                 return -EFAULT;
1179         }
1180 
1181         return 0;
1182 }
1183 
1184 static int kfd_ioctl_acquire_vm(struct file *filep, struct kfd_process *p,
1185                                 void *data)
1186 {
1187         struct kfd_ioctl_acquire_vm_args *args = data;
1188         struct kfd_process_device *pdd;
1189         struct kfd_dev *dev;
1190         struct file *drm_file;
1191         int ret;
1192 
1193         dev = kfd_device_by_id(args->gpu_id);
1194         if (!dev)
1195                 return -EINVAL;
1196 
1197         drm_file = fget(args->drm_fd);
1198         if (!drm_file)
1199                 return -EINVAL;
1200 
1201         mutex_lock(&p->mutex);
1202 
1203         pdd = kfd_get_process_device_data(dev, p);
1204         if (!pdd) {
1205                 ret = -EINVAL;
1206                 goto err_unlock;
1207         }
1208 
1209         if (pdd->drm_file) {
1210                 ret = pdd->drm_file == drm_file ? 0 : -EBUSY;
1211                 goto err_unlock;
1212         }
1213 
1214         ret = kfd_process_device_init_vm(pdd, drm_file);
1215         if (ret)
1216                 goto err_unlock;
1217         /* On success, the PDD keeps the drm_file reference */
1218         mutex_unlock(&p->mutex);
1219 
1220         return 0;
1221 
1222 err_unlock:
1223         mutex_unlock(&p->mutex);
1224         fput(drm_file);
1225         return ret;
1226 }
1227 
1228 bool kfd_dev_is_large_bar(struct kfd_dev *dev)
1229 {
1230         struct kfd_local_mem_info mem_info;
1231 
1232         if (debug_largebar) {
1233                 pr_debug("Simulate large-bar allocation on non large-bar machine\n");
1234                 return true;
1235         }
1236 
1237         if (dev->device_info->needs_iommu_device)
1238                 return false;
1239 
1240         amdgpu_amdkfd_get_local_mem_info(dev->kgd, &mem_info);
1241         if (mem_info.local_mem_size_private == 0 &&
1242                         mem_info.local_mem_size_public > 0)
1243                 return true;
1244         return false;
1245 }
1246 
1247 static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep,
1248                                         struct kfd_process *p, void *data)
1249 {
1250         struct kfd_ioctl_alloc_memory_of_gpu_args *args = data;
1251         struct kfd_process_device *pdd;
1252         void *mem;
1253         struct kfd_dev *dev;
1254         int idr_handle;
1255         long err;
1256         uint64_t offset = args->mmap_offset;
1257         uint32_t flags = args->flags;
1258 
1259         if (args->size == 0)
1260                 return -EINVAL;
1261 
1262         dev = kfd_device_by_id(args->gpu_id);
1263         if (!dev)
1264                 return -EINVAL;
1265 
1266         if ((flags & KFD_IOC_ALLOC_MEM_FLAGS_PUBLIC) &&
1267                 (flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) &&
1268                 !kfd_dev_is_large_bar(dev)) {
1269                 pr_err("Alloc host visible vram on small bar is not allowed\n");
1270                 return -EINVAL;
1271         }
1272 
1273         if (flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) {
1274                 if (args->size != kfd_doorbell_process_slice(dev))
1275                         return -EINVAL;
1276                 offset = kfd_get_process_doorbells(dev, p);
1277         } else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) {
1278                 if (args->size != PAGE_SIZE)
1279                         return -EINVAL;
1280                 offset = amdgpu_amdkfd_get_mmio_remap_phys_addr(dev->kgd);
1281                 if (!offset)
1282                         return -ENOMEM;
1283         }
1284 
1285         mutex_lock(&p->mutex);
1286 
1287         pdd = kfd_bind_process_to_device(dev, p);
1288         if (IS_ERR(pdd)) {
1289                 err = PTR_ERR(pdd);
1290                 goto err_unlock;
1291         }
1292 
1293         err = amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
1294                 dev->kgd, args->va_addr, args->size,
1295                 pdd->vm, (struct kgd_mem **) &mem, &offset,
1296                 flags);
1297 
1298         if (err)
1299                 goto err_unlock;
1300 
1301         idr_handle = kfd_process_device_create_obj_handle(pdd, mem);
1302         if (idr_handle < 0) {
1303                 err = -EFAULT;
1304                 goto err_free;
1305         }
1306 
1307         mutex_unlock(&p->mutex);
1308 
1309         args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);
1310         args->mmap_offset = offset;
1311 
1312         /* MMIO is mapped through kfd device
1313          * Generate a kfd mmap offset
1314          */
1315         if (flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) {
1316                 args->mmap_offset = KFD_MMAP_TYPE_MMIO | KFD_MMAP_GPU_ID(args->gpu_id);
1317                 args->mmap_offset <<= PAGE_SHIFT;
1318         }
1319 
1320         return 0;
1321 
1322 err_free:
1323         amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->kgd, (struct kgd_mem *)mem);
1324 err_unlock:
1325         mutex_unlock(&p->mutex);
1326         return err;
1327 }
1328 
1329 static int kfd_ioctl_free_memory_of_gpu(struct file *filep,
1330                                         struct kfd_process *p, void *data)
1331 {
1332         struct kfd_ioctl_free_memory_of_gpu_args *args = data;
1333         struct kfd_process_device *pdd;
1334         void *mem;
1335         struct kfd_dev *dev;
1336         int ret;
1337 
1338         dev = kfd_device_by_id(GET_GPU_ID(args->handle));
1339         if (!dev)
1340                 return -EINVAL;
1341 
1342         mutex_lock(&p->mutex);
1343 
1344         pdd = kfd_get_process_device_data(dev, p);
1345         if (!pdd) {
1346                 pr_err("Process device data doesn't exist\n");
1347                 ret = -EINVAL;
1348                 goto err_unlock;
1349         }
1350 
1351         mem = kfd_process_device_translate_handle(
1352                 pdd, GET_IDR_HANDLE(args->handle));
1353         if (!mem) {
1354                 ret = -EINVAL;
1355                 goto err_unlock;
1356         }
1357 
1358         ret = amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->kgd,
1359                                                 (struct kgd_mem *)mem);
1360 
1361         /* If freeing the buffer failed, leave the handle in place for
1362          * clean-up during process tear-down.
1363          */
1364         if (!ret)
1365                 kfd_process_device_remove_obj_handle(
1366                         pdd, GET_IDR_HANDLE(args->handle));
1367 
1368 err_unlock:
1369         mutex_unlock(&p->mutex);
1370         return ret;
1371 }
1372 
1373 static int kfd_ioctl_map_memory_to_gpu(struct file *filep,
1374                                         struct kfd_process *p, void *data)
1375 {
1376         struct kfd_ioctl_map_memory_to_gpu_args *args = data;
1377         struct kfd_process_device *pdd, *peer_pdd;
1378         void *mem;
1379         struct kfd_dev *dev, *peer;
1380         long err = 0;
1381         int i;
1382         uint32_t *devices_arr = NULL;
1383 
1384         dev = kfd_device_by_id(GET_GPU_ID(args->handle));
1385         if (!dev)
1386                 return -EINVAL;
1387 
1388         if (!args->n_devices) {
1389                 pr_debug("Device IDs array empty\n");
1390                 return -EINVAL;
1391         }
1392         if (args->n_success > args->n_devices) {
1393                 pr_debug("n_success exceeds n_devices\n");
1394                 return -EINVAL;
1395         }
1396 
1397         devices_arr = kmalloc_array(args->n_devices, sizeof(*devices_arr),
1398                                     GFP_KERNEL);
1399         if (!devices_arr)
1400                 return -ENOMEM;
1401 
1402         err = copy_from_user(devices_arr,
1403                              (void __user *)args->device_ids_array_ptr,
1404                              args->n_devices * sizeof(*devices_arr));
1405         if (err != 0) {
1406                 err = -EFAULT;
1407                 goto copy_from_user_failed;
1408         }
1409 
1410         mutex_lock(&p->mutex);
1411 
1412         pdd = kfd_bind_process_to_device(dev, p);
1413         if (IS_ERR(pdd)) {
1414                 err = PTR_ERR(pdd);
1415                 goto bind_process_to_device_failed;
1416         }
1417 
1418         mem = kfd_process_device_translate_handle(pdd,
1419                                                 GET_IDR_HANDLE(args->handle));
1420         if (!mem) {
1421                 err = -ENOMEM;
1422                 goto get_mem_obj_from_handle_failed;
1423         }
1424 
1425         for (i = args->n_success; i < args->n_devices; i++) {
1426                 peer = kfd_device_by_id(devices_arr[i]);
1427                 if (!peer) {
1428                         pr_debug("Getting device by id failed for 0x%x\n",
1429                                  devices_arr[i]);
1430                         err = -EINVAL;
1431                         goto get_mem_obj_from_handle_failed;
1432                 }
1433 
1434                 peer_pdd = kfd_bind_process_to_device(peer, p);
1435                 if (IS_ERR(peer_pdd)) {
1436                         err = PTR_ERR(peer_pdd);
1437                         goto get_mem_obj_from_handle_failed;
1438                 }
1439                 err = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
1440                         peer->kgd, (struct kgd_mem *)mem, peer_pdd->vm);
1441                 if (err) {
1442                         pr_err("Failed to map to gpu %d/%d\n",
1443                                i, args->n_devices);
1444                         goto map_memory_to_gpu_failed;
1445                 }
1446                 args->n_success = i+1;
1447         }
1448 
1449         mutex_unlock(&p->mutex);
1450 
1451         err = amdgpu_amdkfd_gpuvm_sync_memory(dev->kgd, (struct kgd_mem *) mem, true);
1452         if (err) {
1453                 pr_debug("Sync memory failed, wait interrupted by user signal\n");
1454                 goto sync_memory_failed;
1455         }
1456 
1457         /* Flush TLBs after waiting for the page table updates to complete */
1458         for (i = 0; i < args->n_devices; i++) {
1459                 peer = kfd_device_by_id(devices_arr[i]);
1460                 if (WARN_ON_ONCE(!peer))
1461                         continue;
1462                 peer_pdd = kfd_get_process_device_data(peer, p);
1463                 if (WARN_ON_ONCE(!peer_pdd))
1464                         continue;
1465                 kfd_flush_tlb(peer_pdd);
1466         }
1467 
1468         kfree(devices_arr);
1469 
1470         return err;
1471 
1472 bind_process_to_device_failed:
1473 get_mem_obj_from_handle_failed:
1474 map_memory_to_gpu_failed:
1475         mutex_unlock(&p->mutex);
1476 copy_from_user_failed:
1477 sync_memory_failed:
1478         kfree(devices_arr);
1479 
1480         return err;
1481 }
1482 
1483 static int kfd_ioctl_unmap_memory_from_gpu(struct file *filep,
1484                                         struct kfd_process *p, void *data)
1485 {
1486         struct kfd_ioctl_unmap_memory_from_gpu_args *args = data;
1487         struct kfd_process_device *pdd, *peer_pdd;
1488         void *mem;
1489         struct kfd_dev *dev, *peer;
1490         long err = 0;
1491         uint32_t *devices_arr = NULL, i;
1492 
1493         dev = kfd_device_by_id(GET_GPU_ID(args->handle));
1494         if (!dev)
1495                 return -EINVAL;
1496 
1497         if (!args->n_devices) {
1498                 pr_debug("Device IDs array empty\n");
1499                 return -EINVAL;
1500         }
1501         if (args->n_success > args->n_devices) {
1502                 pr_debug("n_success exceeds n_devices\n");
1503                 return -EINVAL;
1504         }
1505 
1506         devices_arr = kmalloc_array(args->n_devices, sizeof(*devices_arr),
1507                                     GFP_KERNEL);
1508         if (!devices_arr)
1509                 return -ENOMEM;
1510 
1511         err = copy_from_user(devices_arr,
1512                              (void __user *)args->device_ids_array_ptr,
1513                              args->n_devices * sizeof(*devices_arr));
1514         if (err != 0) {
1515                 err = -EFAULT;
1516                 goto copy_from_user_failed;
1517         }
1518 
1519         mutex_lock(&p->mutex);
1520 
1521         pdd = kfd_get_process_device_data(dev, p);
1522         if (!pdd) {
1523                 err = -EINVAL;
1524                 goto bind_process_to_device_failed;
1525         }
1526 
1527         mem = kfd_process_device_translate_handle(pdd,
1528                                                 GET_IDR_HANDLE(args->handle));
1529         if (!mem) {
1530                 err = -ENOMEM;
1531                 goto get_mem_obj_from_handle_failed;
1532         }
1533 
1534         for (i = args->n_success; i < args->n_devices; i++) {
1535                 peer = kfd_device_by_id(devices_arr[i]);
1536                 if (!peer) {
1537                         err = -EINVAL;
1538                         goto get_mem_obj_from_handle_failed;
1539                 }
1540 
1541                 peer_pdd = kfd_get_process_device_data(peer, p);
1542                 if (!peer_pdd) {
1543                         err = -ENODEV;
1544                         goto get_mem_obj_from_handle_failed;
1545                 }
1546                 err = amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(
1547                         peer->kgd, (struct kgd_mem *)mem, peer_pdd->vm);
1548                 if (err) {
1549                         pr_err("Failed to unmap from gpu %d/%d\n",
1550                                i, args->n_devices);
1551                         goto unmap_memory_from_gpu_failed;
1552                 }
1553                 args->n_success = i+1;
1554         }
1555         kfree(devices_arr);
1556 
1557         mutex_unlock(&p->mutex);
1558 
1559         return 0;
1560 
1561 bind_process_to_device_failed:
1562 get_mem_obj_from_handle_failed:
1563 unmap_memory_from_gpu_failed:
1564         mutex_unlock(&p->mutex);
1565 copy_from_user_failed:
1566         kfree(devices_arr);
1567         return err;
1568 }
1569 
1570 static int kfd_ioctl_get_dmabuf_info(struct file *filep,
1571                 struct kfd_process *p, void *data)
1572 {
1573         struct kfd_ioctl_get_dmabuf_info_args *args = data;
1574         struct kfd_dev *dev = NULL;
1575         struct kgd_dev *dma_buf_kgd;
1576         void *metadata_buffer = NULL;
1577         uint32_t flags;
1578         unsigned int i;
1579         int r;
1580 
1581         /* Find a KFD GPU device that supports the get_dmabuf_info query */
1582         for (i = 0; kfd_topology_enum_kfd_devices(i, &dev) == 0; i++)
1583                 if (dev)
1584                         break;
1585         if (!dev)
1586                 return -EINVAL;
1587 
1588         if (args->metadata_ptr) {
1589                 metadata_buffer = kzalloc(args->metadata_size, GFP_KERNEL);
1590                 if (!metadata_buffer)
1591                         return -ENOMEM;
1592         }
1593 
1594         /* Get dmabuf info from KGD */
1595         r = amdgpu_amdkfd_get_dmabuf_info(dev->kgd, args->dmabuf_fd,
1596                                           &dma_buf_kgd, &args->size,
1597                                           metadata_buffer, args->metadata_size,
1598                                           &args->metadata_size, &flags);
1599         if (r)
1600                 goto exit;
1601 
1602         /* Reverse-lookup gpu_id from kgd pointer */
1603         dev = kfd_device_by_kgd(dma_buf_kgd);
1604         if (!dev) {
1605                 r = -EINVAL;
1606                 goto exit;
1607         }
1608         args->gpu_id = dev->id;
1609         args->flags = flags;
1610 
1611         /* Copy metadata buffer to user mode */
1612         if (metadata_buffer) {
1613                 r = copy_to_user((void __user *)args->metadata_ptr,
1614                                  metadata_buffer, args->metadata_size);
1615                 if (r != 0)
1616                         r = -EFAULT;
1617         }
1618 
1619 exit:
1620         kfree(metadata_buffer);
1621 
1622         return r;
1623 }
1624 
1625 static int kfd_ioctl_import_dmabuf(struct file *filep,
1626                                    struct kfd_process *p, void *data)
1627 {
1628         struct kfd_ioctl_import_dmabuf_args *args = data;
1629         struct kfd_process_device *pdd;
1630         struct dma_buf *dmabuf;
1631         struct kfd_dev *dev;
1632         int idr_handle;
1633         uint64_t size;
1634         void *mem;
1635         int r;
1636 
1637         dev = kfd_device_by_id(args->gpu_id);
1638         if (!dev)
1639                 return -EINVAL;
1640 
1641         dmabuf = dma_buf_get(args->dmabuf_fd);
1642         if (IS_ERR(dmabuf))
1643                 return PTR_ERR(dmabuf);
1644 
1645         mutex_lock(&p->mutex);
1646 
1647         pdd = kfd_bind_process_to_device(dev, p);
1648         if (IS_ERR(pdd)) {
1649                 r = PTR_ERR(pdd);
1650                 goto err_unlock;
1651         }
1652 
1653         r = amdgpu_amdkfd_gpuvm_import_dmabuf(dev->kgd, dmabuf,
1654                                               args->va_addr, pdd->vm,
1655                                               (struct kgd_mem **)&mem, &size,
1656                                               NULL);
1657         if (r)
1658                 goto err_unlock;
1659 
1660         idr_handle = kfd_process_device_create_obj_handle(pdd, mem);
1661         if (idr_handle < 0) {
1662                 r = -EFAULT;
1663                 goto err_free;
1664         }
1665 
1666         mutex_unlock(&p->mutex);
1667 
1668         args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);
1669 
1670         return 0;
1671 
1672 err_free:
1673         amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->kgd, (struct kgd_mem *)mem);
1674 err_unlock:
1675         mutex_unlock(&p->mutex);
1676         return r;
1677 }
1678 
1679 #define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \
1680         [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, \
1681                             .cmd_drv = 0, .name = #ioctl}
1682 
1683 /** Ioctl table */
1684 static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
1685         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_VERSION,
1686                         kfd_ioctl_get_version, 0),
1687 
1688         AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_QUEUE,
1689                         kfd_ioctl_create_queue, 0),
1690 
1691         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_QUEUE,
1692                         kfd_ioctl_destroy_queue, 0),
1693 
1694         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_MEMORY_POLICY,
1695                         kfd_ioctl_set_memory_policy, 0),
1696 
1697         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_CLOCK_COUNTERS,
1698                         kfd_ioctl_get_clock_counters, 0),
1699 
1700         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES,
1701                         kfd_ioctl_get_process_apertures, 0),
1702 
1703         AMDKFD_IOCTL_DEF(AMDKFD_IOC_UPDATE_QUEUE,
1704                         kfd_ioctl_update_queue, 0),
1705 
1706         AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_EVENT,
1707                         kfd_ioctl_create_event, 0),
1708 
1709         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_EVENT,
1710                         kfd_ioctl_destroy_event, 0),
1711 
1712         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_EVENT,
1713                         kfd_ioctl_set_event, 0),
1714 
1715         AMDKFD_IOCTL_DEF(AMDKFD_IOC_RESET_EVENT,
1716                         kfd_ioctl_reset_event, 0),
1717 
1718         AMDKFD_IOCTL_DEF(AMDKFD_IOC_WAIT_EVENTS,
1719                         kfd_ioctl_wait_events, 0),
1720 
1721         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_REGISTER,
1722                         kfd_ioctl_dbg_register, 0),
1723 
1724         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_UNREGISTER,
1725                         kfd_ioctl_dbg_unregister, 0),
1726 
1727         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_ADDRESS_WATCH,
1728                         kfd_ioctl_dbg_address_watch, 0),
1729 
1730         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_WAVE_CONTROL,
1731                         kfd_ioctl_dbg_wave_control, 0),
1732 
1733         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_SCRATCH_BACKING_VA,
1734                         kfd_ioctl_set_scratch_backing_va, 0),
1735 
1736         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_TILE_CONFIG,
1737                         kfd_ioctl_get_tile_config, 0),
1738 
1739         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_TRAP_HANDLER,
1740                         kfd_ioctl_set_trap_handler, 0),
1741 
1742         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES_NEW,
1743                         kfd_ioctl_get_process_apertures_new, 0),
1744 
1745         AMDKFD_IOCTL_DEF(AMDKFD_IOC_ACQUIRE_VM,
1746                         kfd_ioctl_acquire_vm, 0),
1747 
1748         AMDKFD_IOCTL_DEF(AMDKFD_IOC_ALLOC_MEMORY_OF_GPU,
1749                         kfd_ioctl_alloc_memory_of_gpu, 0),
1750 
1751         AMDKFD_IOCTL_DEF(AMDKFD_IOC_FREE_MEMORY_OF_GPU,
1752                         kfd_ioctl_free_memory_of_gpu, 0),
1753 
1754         AMDKFD_IOCTL_DEF(AMDKFD_IOC_MAP_MEMORY_TO_GPU,
1755                         kfd_ioctl_map_memory_to_gpu, 0),
1756 
1757         AMDKFD_IOCTL_DEF(AMDKFD_IOC_UNMAP_MEMORY_FROM_GPU,
1758                         kfd_ioctl_unmap_memory_from_gpu, 0),
1759 
1760         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_CU_MASK,
1761                         kfd_ioctl_set_cu_mask, 0),
1762 
1763         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_QUEUE_WAVE_STATE,
1764                         kfd_ioctl_get_queue_wave_state, 0),
1765 
1766         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_DMABUF_INFO,
1767                                 kfd_ioctl_get_dmabuf_info, 0),
1768 
1769         AMDKFD_IOCTL_DEF(AMDKFD_IOC_IMPORT_DMABUF,
1770                                 kfd_ioctl_import_dmabuf, 0),
1771 
1772 };
1773 
1774 #define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls)
1775 
1776 static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
1777 {
1778         struct kfd_process *process;
1779         amdkfd_ioctl_t *func;
1780         const struct amdkfd_ioctl_desc *ioctl = NULL;
1781         unsigned int nr = _IOC_NR(cmd);
1782         char stack_kdata[128];
1783         char *kdata = NULL;
1784         unsigned int usize, asize;
1785         int retcode = -EINVAL;
1786 
1787         if (nr >= AMDKFD_CORE_IOCTL_COUNT)
1788                 goto err_i1;
1789 
1790         if ((nr >= AMDKFD_COMMAND_START) && (nr < AMDKFD_COMMAND_END)) {
1791                 u32 amdkfd_size;
1792 
1793                 ioctl = &amdkfd_ioctls[nr];
1794 
1795                 amdkfd_size = _IOC_SIZE(ioctl->cmd);
1796                 usize = asize = _IOC_SIZE(cmd);
1797                 if (amdkfd_size > asize)
1798                         asize = amdkfd_size;
1799 
1800                 cmd = ioctl->cmd;
1801         } else
1802                 goto err_i1;
1803 
1804         dev_dbg(kfd_device, "ioctl cmd 0x%x (#%d), arg 0x%lx\n", cmd, nr, arg);
1805 
1806         process = kfd_get_process(current);
1807         if (IS_ERR(process)) {
1808                 dev_dbg(kfd_device, "no process\n");
1809                 goto err_i1;
1810         }
1811 
1812         /* Do not trust userspace, use our own definition */
1813         func = ioctl->func;
1814 
1815         if (unlikely(!func)) {
1816                 dev_dbg(kfd_device, "no function\n");
1817                 retcode = -EINVAL;
1818                 goto err_i1;
1819         }
1820 
1821         if (cmd & (IOC_IN | IOC_OUT)) {
1822                 if (asize <= sizeof(stack_kdata)) {
1823                         kdata = stack_kdata;
1824                 } else {
1825                         kdata = kmalloc(asize, GFP_KERNEL);
1826                         if (!kdata) {
1827                                 retcode = -ENOMEM;
1828                                 goto err_i1;
1829                         }
1830                 }
1831                 if (asize > usize)
1832                         memset(kdata + usize, 0, asize - usize);
1833         }
1834 
1835         if (cmd & IOC_IN) {
1836                 if (copy_from_user(kdata, (void __user *)arg, usize) != 0) {
1837                         retcode = -EFAULT;
1838                         goto err_i1;
1839                 }
1840         } else if (cmd & IOC_OUT) {
1841                 memset(kdata, 0, usize);
1842         }
1843 
1844         retcode = func(filep, process, kdata);
1845 
1846         if (cmd & IOC_OUT)
1847                 if (copy_to_user((void __user *)arg, kdata, usize) != 0)
1848                         retcode = -EFAULT;
1849 
1850 err_i1:
1851         if (!ioctl)
1852                 dev_dbg(kfd_device, "invalid ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
1853                           task_pid_nr(current), cmd, nr);
1854 
1855         if (kdata != stack_kdata)
1856                 kfree(kdata);
1857 
1858         if (retcode)
1859                 dev_dbg(kfd_device, "ret = %d\n", retcode);
1860 
1861         return retcode;
1862 }
1863 
1864 static int kfd_mmio_mmap(struct kfd_dev *dev, struct kfd_process *process,
1865                       struct vm_area_struct *vma)
1866 {
1867         phys_addr_t address;
1868         int ret;
1869 
1870         if (vma->vm_end - vma->vm_start != PAGE_SIZE)
1871                 return -EINVAL;
1872 
1873         address = amdgpu_amdkfd_get_mmio_remap_phys_addr(dev->kgd);
1874 
1875         vma->vm_flags |= VM_IO | VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |
1876                                 VM_DONTDUMP | VM_PFNMAP;
1877 
1878         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1879 
1880         pr_debug("Process %d mapping mmio page\n"
1881                  "     target user address == 0x%08llX\n"
1882                  "     physical address    == 0x%08llX\n"
1883                  "     vm_flags            == 0x%04lX\n"
1884                  "     size                == 0x%04lX\n",
1885                  process->pasid, (unsigned long long) vma->vm_start,
1886                  address, vma->vm_flags, PAGE_SIZE);
1887 
1888         ret = io_remap_pfn_range(vma,
1889                                 vma->vm_start,
1890                                 address >> PAGE_SHIFT,
1891                                 PAGE_SIZE,
1892                                 vma->vm_page_prot);
1893         return ret;
1894 }
1895 
1896 
1897 static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
1898 {
1899         struct kfd_process *process;
1900         struct kfd_dev *dev = NULL;
1901         unsigned long vm_pgoff;
1902         unsigned int gpu_id;
1903 
1904         process = kfd_get_process(current);
1905         if (IS_ERR(process))
1906                 return PTR_ERR(process);
1907 
1908         vm_pgoff = vma->vm_pgoff;
1909         vma->vm_pgoff = KFD_MMAP_OFFSET_VALUE_GET(vm_pgoff);
1910         gpu_id = KFD_MMAP_GPU_ID_GET(vm_pgoff);
1911         if (gpu_id)
1912                 dev = kfd_device_by_id(gpu_id);
1913 
1914         switch (vm_pgoff & KFD_MMAP_TYPE_MASK) {
1915         case KFD_MMAP_TYPE_DOORBELL:
1916                 if (!dev)
1917                         return -ENODEV;
1918                 return kfd_doorbell_mmap(dev, process, vma);
1919 
1920         case KFD_MMAP_TYPE_EVENTS:
1921                 return kfd_event_mmap(process, vma);
1922 
1923         case KFD_MMAP_TYPE_RESERVED_MEM:
1924                 if (!dev)
1925                         return -ENODEV;
1926                 return kfd_reserved_mem_mmap(dev, process, vma);
1927         case KFD_MMAP_TYPE_MMIO:
1928                 if (!dev)
1929                         return -ENODEV;
1930                 return kfd_mmio_mmap(dev, process, vma);
1931         }
1932 
1933         return -EFAULT;
1934 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c

DEFINITIONS
