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

   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/sched.h>
  28 #include <linux/slab.h>
  29 #include <linux/uaccess.h>
  30 #include <linux/compat.h>
  31 #include <uapi/linux/kfd_ioctl.h>
  32 #include <linux/time.h>
  33 #include <linux/mm.h>
  34 #include <linux/mman.h>
  35 #include <asm/processor.h>
  36 #include "kfd_priv.h"
  37 #include "kfd_device_queue_manager.h"
  38 #include "kfd_dbgmgr.h"
  39
  40 static long kfd_ioctl(struct file *, unsigned int, unsigned long);
  41 static int kfd_open(struct inode *, struct file *);
  42 static int kfd_mmap(struct file *, struct vm_area_struct *);
  43
  44 static const char kfd_dev_name[] = "kfd";
  45
  46 static const struct file_operations kfd_fops = {
  47         .owner = THIS_MODULE,
  48         .unlocked_ioctl = kfd_ioctl,
  49         .compat_ioctl = kfd_ioctl,
  50         .open = kfd_open,
  51         .mmap = kfd_mmap,
  52 };
  53
  54 static int kfd_char_dev_major = -1;
  55 static struct class *kfd_class;
  56 struct device *kfd_device;
  57
  58 int kfd_chardev_init(void)
  59 {
  60         int err = 0;
  61
  62         kfd_char_dev_major = register_chrdev(0, kfd_dev_name, &kfd_fops);
  63         err = kfd_char_dev_major;
  64         if (err < 0)
  65                 goto err_register_chrdev;
  66
  67         kfd_class = class_create(THIS_MODULE, kfd_dev_name);
  68         err = PTR_ERR(kfd_class);
  69         if (IS_ERR(kfd_class))
  70                 goto err_class_create;
  71
  72         kfd_device = device_create(kfd_class, NULL,
  73                                         MKDEV(kfd_char_dev_major, 0),
  74                                         NULL, kfd_dev_name);
  75         err = PTR_ERR(kfd_device);
  76         if (IS_ERR(kfd_device))
  77                 goto err_device_create;
  78
  79         return 0;
  80
  81 err_device_create:
  82         class_destroy(kfd_class);
  83 err_class_create:
  84         unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
  85 err_register_chrdev:
  86         return err;
  87 }
  88
  89 void kfd_chardev_exit(void)
  90 {
  91         device_destroy(kfd_class, MKDEV(kfd_char_dev_major, 0));
  92         class_destroy(kfd_class);
  93         unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
  94 }
  95
  96 struct device *kfd_chardev(void)
  97 {
  98         return kfd_device;
  99 }
 100
 101
 102 static int kfd_open(struct inode *inode, struct file *filep)
 103 {
 104         struct kfd_process *process;
 105         bool is_32bit_user_mode;
 106
 107         if (iminor(inode) != 0)
 108                 return -ENODEV;
 109
 110         is_32bit_user_mode = in_compat_syscall();
 111
 112         if (is_32bit_user_mode) {
 113                 dev_warn(kfd_device,
 114                         "Process %d (32-bit) failed to open /dev/kfd\n"
 115                         "32-bit processes are not supported by amdkfd\n",
 116                         current->pid);
 117                 return -EPERM;
 118         }
 119
 120         process = kfd_create_process(current);
 121         if (IS_ERR(process))
 122                 return PTR_ERR(process);
 123
 124         dev_dbg(kfd_device, "process %d opened, compat mode (32 bit) - %d\n",
 125                 process->pasid, process->is_32bit_user_mode);
 126
 127         return 0;
 128 }
 129
 130 static int kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
 131                                         void *data)
 132 {
 133         struct kfd_ioctl_get_version_args *args = data;
 134
 135         args->major_version = KFD_IOCTL_MAJOR_VERSION;
 136         args->minor_version = KFD_IOCTL_MINOR_VERSION;
 137
 138         return 0;
 139 }
 140
 141 static int set_queue_properties_from_user(struct queue_properties *q_properties,
 142                                 struct kfd_ioctl_create_queue_args *args)
 143 {
 144         if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
 145                 pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
 146                 return -EINVAL;
 147         }
 148
 149         if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
 150                 pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
 151                 return -EINVAL;
 152         }
 153
 154         if ((args->ring_base_address) &&
 155                 (!access_ok(VERIFY_WRITE,
 156                         (const void __user *) args->ring_base_address,
 157                         sizeof(uint64_t)))) {
 158                 pr_err("kfd: can't access ring base address\n");
 159                 return -EFAULT;
 160         }
 161
 162         if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
 163                 pr_err("kfd: ring size must be a power of 2 or 0\n");
 164                 return -EINVAL;
 165         }
 166
 167         if (!access_ok(VERIFY_WRITE,
 168                         (const void __user *) args->read_pointer_address,
 169                         sizeof(uint32_t))) {
 170                 pr_err("kfd: can't access read pointer\n");
 171                 return -EFAULT;
 172         }
 173
 174         if (!access_ok(VERIFY_WRITE,
 175                         (const void __user *) args->write_pointer_address,
 176                         sizeof(uint32_t))) {
 177                 pr_err("kfd: can't access write pointer\n");
 178                 return -EFAULT;
 179         }
 180
 181         if (args->eop_buffer_address &&
 182                 !access_ok(VERIFY_WRITE,
 183                         (const void __user *) args->eop_buffer_address,
 184                         sizeof(uint32_t))) {
 185                 pr_debug("kfd: can't access eop buffer");
 186                 return -EFAULT;
 187         }
 188
 189         if (args->ctx_save_restore_address &&
 190                 !access_ok(VERIFY_WRITE,
 191                         (const void __user *) args->ctx_save_restore_address,
 192                         sizeof(uint32_t))) {
 193                 pr_debug("kfd: can't access ctx save restore buffer");
 194                 return -EFAULT;
 195         }
 196
 197         q_properties->is_interop = false;
 198         q_properties->queue_percent = args->queue_percentage;
 199         q_properties->priority = args->queue_priority;
 200         q_properties->queue_address = args->ring_base_address;
 201         q_properties->queue_size = args->ring_size;
 202         q_properties->read_ptr = (uint32_t *) args->read_pointer_address;
 203         q_properties->write_ptr = (uint32_t *) args->write_pointer_address;
 204         q_properties->eop_ring_buffer_address = args->eop_buffer_address;
 205         q_properties->eop_ring_buffer_size = args->eop_buffer_size;
 206         q_properties->ctx_save_restore_area_address =
 207                         args->ctx_save_restore_address;
 208         q_properties->ctx_save_restore_area_size = args->ctx_save_restore_size;
 209         if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE ||
 210                 args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
 211                 q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
 212         else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA)
 213                 q_properties->type = KFD_QUEUE_TYPE_SDMA;
 214         else
 215                 return -ENOTSUPP;
 216
 217         if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
 218                 q_properties->format = KFD_QUEUE_FORMAT_AQL;
 219         else
 220                 q_properties->format = KFD_QUEUE_FORMAT_PM4;
 221
 222         pr_debug("Queue Percentage (%d, %d)\n",
 223                         q_properties->queue_percent, args->queue_percentage);
 224
 225         pr_debug("Queue Priority (%d, %d)\n",
 226                         q_properties->priority, args->queue_priority);
 227
 228         pr_debug("Queue Address (0x%llX, 0x%llX)\n",
 229                         q_properties->queue_address, args->ring_base_address);
 230
 231         pr_debug("Queue Size (0x%llX, %u)\n",
 232                         q_properties->queue_size, args->ring_size);
 233
 234         pr_debug("Queue r/w Pointers (0x%llX, 0x%llX)\n",
 235                         (uint64_t) q_properties->read_ptr,
 236                         (uint64_t) q_properties->write_ptr);
 237
 238         pr_debug("Queue Format (%d)\n", q_properties->format);
 239
 240         pr_debug("Queue EOP (0x%llX)\n", q_properties->eop_ring_buffer_address);
 241
 242         pr_debug("Queue CTX save arex (0x%llX)\n",
 243                         q_properties->ctx_save_restore_area_address);
 244
 245         return 0;
 246 }
 247
 248 static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
 249                                         void *data)
 250 {
 251         struct kfd_ioctl_create_queue_args *args = data;
 252         struct kfd_dev *dev;
 253         int err = 0;
 254         unsigned int queue_id;
 255         struct kfd_process_device *pdd;
 256         struct queue_properties q_properties;
 257
 258         memset(&q_properties, 0, sizeof(struct queue_properties));
 259
 260         pr_debug("kfd: creating queue ioctl\n");
 261
 262         err = set_queue_properties_from_user(&q_properties, args);
 263         if (err)
 264                 return err;
 265
 266         pr_debug("kfd: looking for gpu id 0x%x\n", args->gpu_id);
 267         dev = kfd_device_by_id(args->gpu_id);
 268         if (dev == NULL) {
 269                 pr_debug("kfd: gpu id 0x%x was not found\n", args->gpu_id);
 270                 return -EINVAL;
 271         }
 272
 273         mutex_lock(&p->mutex);
 274
 275         pdd = kfd_bind_process_to_device(dev, p);
 276         if (IS_ERR(pdd)) {
 277                 err = -ESRCH;
 278                 goto err_bind_process;
 279         }
 280
 281         pr_debug("kfd: creating queue for PASID %d on GPU 0x%x\n",
 282                         p->pasid,
 283                         dev->id);
 284
 285         err = pqm_create_queue(&p->pqm, dev, filep, &q_properties,
 286                                 0, q_properties.type, &queue_id);
 287         if (err != 0)
 288                 goto err_create_queue;
 289
 290         args->queue_id = queue_id;
 291
 292
 293         /* Return gpu_id as doorbell offset for mmap usage */
 294         args->doorbell_offset = (KFD_MMAP_DOORBELL_MASK | args->gpu_id);
 295         args->doorbell_offset <<= PAGE_SHIFT;
 296
 297         mutex_unlock(&p->mutex);
 298
 299         pr_debug("kfd: queue id %d was created successfully\n", args->queue_id);
 300
 301         pr_debug("ring buffer address == 0x%016llX\n",
 302                         args->ring_base_address);
 303
 304         pr_debug("read ptr address    == 0x%016llX\n",
 305                         args->read_pointer_address);
 306
 307         pr_debug("write ptr address   == 0x%016llX\n",
 308                         args->write_pointer_address);
 309
 310         return 0;
 311
 312 err_create_queue:
 313 err_bind_process:
 314         mutex_unlock(&p->mutex);
 315         return err;
 316 }
 317
 318 static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p,
 319                                         void *data)
 320 {
 321         int retval;
 322         struct kfd_ioctl_destroy_queue_args *args = data;
 323
 324         pr_debug("kfd: destroying queue id %d for PASID %d\n",
 325                                 args->queue_id,
 326                                 p->pasid);
 327
 328         mutex_lock(&p->mutex);
 329
 330         retval = pqm_destroy_queue(&p->pqm, args->queue_id);
 331
 332         mutex_unlock(&p->mutex);
 333         return retval;
 334 }
 335
 336 static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p,
 337                                         void *data)
 338 {
 339         int retval;
 340         struct kfd_ioctl_update_queue_args *args = data;
 341         struct queue_properties properties;
 342
 343         if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
 344                 pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
 345                 return -EINVAL;
 346         }
 347
 348         if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
 349                 pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
 350                 return -EINVAL;
 351         }
 352
 353         if ((args->ring_base_address) &&
 354                 (!access_ok(VERIFY_WRITE,
 355                         (const void __user *) args->ring_base_address,
 356                         sizeof(uint64_t)))) {
 357                 pr_err("kfd: can't access ring base address\n");
 358                 return -EFAULT;
 359         }
 360
 361         if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
 362                 pr_err("kfd: ring size must be a power of 2 or 0\n");
 363                 return -EINVAL;
 364         }
 365
 366         properties.queue_address = args->ring_base_address;
 367         properties.queue_size = args->ring_size;
 368         properties.queue_percent = args->queue_percentage;
 369         properties.priority = args->queue_priority;
 370
 371         pr_debug("kfd: updating queue id %d for PASID %d\n",
 372                         args->queue_id, p->pasid);
 373
 374         mutex_lock(&p->mutex);
 375
 376         retval = pqm_update_queue(&p->pqm, args->queue_id, &properties);
 377
 378         mutex_unlock(&p->mutex);
 379
 380         return retval;
 381 }
 382
 383 static int kfd_ioctl_set_memory_policy(struct file *filep,
 384                                         struct kfd_process *p, void *data)
 385 {
 386         struct kfd_ioctl_set_memory_policy_args *args = data;
 387         struct kfd_dev *dev;
 388         int err = 0;
 389         struct kfd_process_device *pdd;
 390         enum cache_policy default_policy, alternate_policy;
 391
 392         if (args->default_policy != KFD_IOC_CACHE_POLICY_COHERENT
 393             && args->default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
 394                 return -EINVAL;
 395         }
 396
 397         if (args->alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
 398             && args->alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
 399                 return -EINVAL;
 400         }
 401
 402         dev = kfd_device_by_id(args->gpu_id);
 403         if (dev == NULL)
 404                 return -EINVAL;
 405
 406         mutex_lock(&p->mutex);
 407
 408         pdd = kfd_bind_process_to_device(dev, p);
 409         if (IS_ERR(pdd)) {
 410                 err = -ESRCH;
 411                 goto out;
 412         }
 413
 414         default_policy = (args->default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
 415                          ? cache_policy_coherent : cache_policy_noncoherent;
 416
 417         alternate_policy =
 418                 (args->alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
 419                    ? cache_policy_coherent : cache_policy_noncoherent;
 420
 421         if (!dev->dqm->ops.set_cache_memory_policy(dev->dqm,
 422                                 &pdd->qpd,
 423                                 default_policy,
 424                                 alternate_policy,
 425                                 (void __user *)args->alternate_aperture_base,
 426                                 args->alternate_aperture_size))
 427                 err = -EINVAL;
 428
 429 out:
 430         mutex_unlock(&p->mutex);
 431
 432         return err;
 433 }
 434
 435 static int kfd_ioctl_dbg_register(struct file *filep,
 436                                 struct kfd_process *p, void *data)
 437 {
 438         struct kfd_ioctl_dbg_register_args *args = data;
 439         struct kfd_dev *dev;
 440         struct kfd_dbgmgr *dbgmgr_ptr;
 441         struct kfd_process_device *pdd;
 442         bool create_ok;
 443         long status = 0;
 444
 445         dev = kfd_device_by_id(args->gpu_id);
 446         if (dev == NULL)
 447                 return -EINVAL;
 448
 449         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 450                 pr_debug("kfd_ioctl_dbg_register not supported on CZ\n");
 451                 return -EINVAL;
 452         }
 453
 454         mutex_lock(kfd_get_dbgmgr_mutex());
 455         mutex_lock(&p->mutex);
 456
 457         /*
 458          * make sure that we have pdd, if this the first queue created for
 459          * this process
 460          */
 461         pdd = kfd_bind_process_to_device(dev, p);
 462         if (IS_ERR(pdd)) {
 463                 mutex_unlock(&p->mutex);
 464                 mutex_unlock(kfd_get_dbgmgr_mutex());
 465                 return PTR_ERR(pdd);
 466         }
 467
 468         if (dev->dbgmgr == NULL) {
 469                 /* In case of a legal call, we have no dbgmgr yet */
 470                 create_ok = kfd_dbgmgr_create(&dbgmgr_ptr, dev);
 471                 if (create_ok) {
 472                         status = kfd_dbgmgr_register(dbgmgr_ptr, p);
 473                         if (status != 0)
 474                                 kfd_dbgmgr_destroy(dbgmgr_ptr);
 475                         else
 476                                 dev->dbgmgr = dbgmgr_ptr;
 477                 }
 478         } else {
 479                 pr_debug("debugger already registered\n");
 480                 status = -EINVAL;
 481         }
 482
 483         mutex_unlock(&p->mutex);
 484         mutex_unlock(kfd_get_dbgmgr_mutex());
 485
 486         return status;
 487 }
 488
 489 static int kfd_ioctl_dbg_unrgesiter(struct file *filep,
 490                                 struct kfd_process *p, void *data)
 491 {
 492         struct kfd_ioctl_dbg_unregister_args *args = data;
 493         struct kfd_dev *dev;
 494         long status;
 495
 496         dev = kfd_device_by_id(args->gpu_id);
 497         if (dev == NULL)
 498                 return -EINVAL;
 499
 500         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 501                 pr_debug("kfd_ioctl_dbg_unrgesiter not supported on CZ\n");
 502                 return -EINVAL;
 503         }
 504
 505         mutex_lock(kfd_get_dbgmgr_mutex());
 506
 507         status = kfd_dbgmgr_unregister(dev->dbgmgr, p);
 508         if (status == 0) {
 509                 kfd_dbgmgr_destroy(dev->dbgmgr);
 510                 dev->dbgmgr = NULL;
 511         }
 512
 513         mutex_unlock(kfd_get_dbgmgr_mutex());
 514
 515         return status;
 516 }
 517
 518 /*
 519  * Parse and generate variable size data structure for address watch.
 520  * Total size of the buffer and # watch points is limited in order
 521  * to prevent kernel abuse. (no bearing to the much smaller HW limitation
 522  * which is enforced by dbgdev module)
 523  * please also note that the watch address itself are not "copied from user",
 524  * since it be set into the HW in user mode values.
 525  *
 526  */
 527 static int kfd_ioctl_dbg_address_watch(struct file *filep,
 528                                         struct kfd_process *p, void *data)
 529 {
 530         struct kfd_ioctl_dbg_address_watch_args *args = data;
 531         struct kfd_dev *dev;
 532         struct dbg_address_watch_info aw_info;
 533         unsigned char *args_buff;
 534         long status;
 535         void __user *cmd_from_user;
 536         uint64_t watch_mask_value = 0;
 537         unsigned int args_idx = 0;
 538
 539         memset((void *) &aw_info, 0, sizeof(struct dbg_address_watch_info));
 540
 541         dev = kfd_device_by_id(args->gpu_id);
 542         if (dev == NULL)
 543                 return -EINVAL;
 544
 545         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 546                 pr_debug("kfd_ioctl_dbg_wave_control not supported on CZ\n");
 547                 return -EINVAL;
 548         }
 549
 550         cmd_from_user = (void __user *) args->content_ptr;
 551
 552         /* Validate arguments */
 553
 554         if ((args->buf_size_in_bytes > MAX_ALLOWED_AW_BUFF_SIZE) ||
 555                 (args->buf_size_in_bytes <= sizeof(*args) + sizeof(int) * 2) ||
 556                 (cmd_from_user == NULL))
 557                 return -EINVAL;
 558
 559         /* this is the actual buffer to work with */
 560         args_buff = memdup_user(cmd_from_user,
 561                                 args->buf_size_in_bytes - sizeof(*args));
 562         if (IS_ERR(args_buff))
 563                 return PTR_ERR(args_buff);
 564
 565         aw_info.process = p;
 566
 567         aw_info.num_watch_points = *((uint32_t *)(&args_buff[args_idx]));
 568         args_idx += sizeof(aw_info.num_watch_points);
 569
 570         aw_info.watch_mode = (enum HSA_DBG_WATCH_MODE *) &args_buff[args_idx];
 571         args_idx += sizeof(enum HSA_DBG_WATCH_MODE) * aw_info.num_watch_points;
 572
 573         /*
 574          * set watch address base pointer to point on the array base
 575          * within args_buff
 576          */
 577         aw_info.watch_address = (uint64_t *) &args_buff[args_idx];
 578
 579         /* skip over the addresses buffer */
 580         args_idx += sizeof(aw_info.watch_address) * aw_info.num_watch_points;
 581
 582         if (args_idx >= args->buf_size_in_bytes - sizeof(*args)) {
 583                 kfree(args_buff);
 584                 return -EINVAL;
 585         }
 586
 587         watch_mask_value = (uint64_t) args_buff[args_idx];
 588
 589         if (watch_mask_value > 0) {
 590                 /*
 591                  * There is an array of masks.
 592                  * set watch mask base pointer to point on the array base
 593                  * within args_buff
 594                  */
 595                 aw_info.watch_mask = (uint64_t *) &args_buff[args_idx];
 596
 597                 /* skip over the masks buffer */
 598                 args_idx += sizeof(aw_info.watch_mask) *
 599                                 aw_info.num_watch_points;
 600         } else {
 601                 /* just the NULL mask, set to NULL and skip over it */
 602                 aw_info.watch_mask = NULL;
 603                 args_idx += sizeof(aw_info.watch_mask);
 604         }
 605
 606         if (args_idx >= args->buf_size_in_bytes - sizeof(args)) {
 607                 kfree(args_buff);
 608                 return -EINVAL;
 609         }
 610
 611         /* Currently HSA Event is not supported for DBG */
 612         aw_info.watch_event = NULL;
 613
 614         mutex_lock(kfd_get_dbgmgr_mutex());
 615
 616         status = kfd_dbgmgr_address_watch(dev->dbgmgr, &aw_info);
 617
 618         mutex_unlock(kfd_get_dbgmgr_mutex());
 619
 620         kfree(args_buff);
 621
 622         return status;
 623 }
 624
 625 /* Parse and generate fixed size data structure for wave control */
 626 static int kfd_ioctl_dbg_wave_control(struct file *filep,
 627                                         struct kfd_process *p, void *data)
 628 {
 629         struct kfd_ioctl_dbg_wave_control_args *args = data;
 630         struct kfd_dev *dev;
 631         struct dbg_wave_control_info wac_info;
 632         unsigned char *args_buff;
 633         uint32_t computed_buff_size;
 634         long status;
 635         void __user *cmd_from_user;
 636         unsigned int args_idx = 0;
 637
 638         memset((void *) &wac_info, 0, sizeof(struct dbg_wave_control_info));
 639
 640         /* we use compact form, independent of the packing attribute value */
 641         computed_buff_size = sizeof(*args) +
 642                                 sizeof(wac_info.mode) +
 643                                 sizeof(wac_info.operand) +
 644                                 sizeof(wac_info.dbgWave_msg.DbgWaveMsg) +
 645                                 sizeof(wac_info.dbgWave_msg.MemoryVA) +
 646                                 sizeof(wac_info.trapId);
 647
 648         dev = kfd_device_by_id(args->gpu_id);
 649         if (dev == NULL)
 650                 return -EINVAL;
 651
 652         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 653                 pr_debug("kfd_ioctl_dbg_wave_control not supported on CZ\n");
 654                 return -EINVAL;
 655         }
 656
 657         /* input size must match the computed "compact" size */
 658         if (args->buf_size_in_bytes != computed_buff_size) {
 659                 pr_debug("size mismatch, computed : actual %u : %u\n",
 660                                 args->buf_size_in_bytes, computed_buff_size);
 661                 return -EINVAL;
 662         }
 663
 664         cmd_from_user = (void __user *) args->content_ptr;
 665
 666         if (cmd_from_user == NULL)
 667                 return -EINVAL;
 668
 669         /* copy the entire buffer from user */
 670
 671         args_buff = memdup_user(cmd_from_user,
 672                                 args->buf_size_in_bytes - sizeof(*args));
 673         if (IS_ERR(args_buff))
 674                 return PTR_ERR(args_buff);
 675
 676         /* move ptr to the start of the "pay-load" area */
 677         wac_info.process = p;
 678
 679         wac_info.operand = *((enum HSA_DBG_WAVEOP *)(&args_buff[args_idx]));
 680         args_idx += sizeof(wac_info.operand);
 681
 682         wac_info.mode = *((enum HSA_DBG_WAVEMODE *)(&args_buff[args_idx]));
 683         args_idx += sizeof(wac_info.mode);
 684
 685         wac_info.trapId = *((uint32_t *)(&args_buff[args_idx]));
 686         args_idx += sizeof(wac_info.trapId);
 687
 688         wac_info.dbgWave_msg.DbgWaveMsg.WaveMsgInfoGen2.Value =
 689                                         *((uint32_t *)(&args_buff[args_idx]));
 690         wac_info.dbgWave_msg.MemoryVA = NULL;
 691
 692         mutex_lock(kfd_get_dbgmgr_mutex());
 693
 694         pr_debug("Calling dbg manager process %p, operand %u, mode %u, trapId %u, message %u\n",
 695                         wac_info.process, wac_info.operand,
 696                         wac_info.mode, wac_info.trapId,
 697                         wac_info.dbgWave_msg.DbgWaveMsg.WaveMsgInfoGen2.Value);
 698
 699         status = kfd_dbgmgr_wave_control(dev->dbgmgr, &wac_info);
 700
 701         pr_debug("Returned status of dbg manager is %ld\n", status);
 702
 703         mutex_unlock(kfd_get_dbgmgr_mutex());
 704
 705         kfree(args_buff);
 706
 707         return status;
 708 }
 709
 710 static int kfd_ioctl_get_clock_counters(struct file *filep,
 711                                 struct kfd_process *p, void *data)
 712 {
 713         struct kfd_ioctl_get_clock_counters_args *args = data;
 714         struct kfd_dev *dev;
 715         struct timespec64 time;
 716
 717         dev = kfd_device_by_id(args->gpu_id);
 718         if (dev == NULL)
 719                 return -EINVAL;
 720
 721         /* Reading GPU clock counter from KGD */
 722         args->gpu_clock_counter =
 723                 dev->kfd2kgd->get_gpu_clock_counter(dev->kgd);
 724
 725         /* No access to rdtsc. Using raw monotonic time */
 726         getrawmonotonic64(&time);
 727         args->cpu_clock_counter = (uint64_t)timespec64_to_ns(&time);
 728
 729         get_monotonic_boottime64(&time);
 730         args->system_clock_counter = (uint64_t)timespec64_to_ns(&time);
 731
 732         /* Since the counter is in nano-seconds we use 1GHz frequency */
 733         args->system_clock_freq = 1000000000;
 734
 735         return 0;
 736 }
 737
 738
 739 static int kfd_ioctl_get_process_apertures(struct file *filp,
 740                                 struct kfd_process *p, void *data)
 741 {
 742         struct kfd_ioctl_get_process_apertures_args *args = data;
 743         struct kfd_process_device_apertures *pAperture;
 744         struct kfd_process_device *pdd;
 745
 746         dev_dbg(kfd_device, "get apertures for PASID %d", p->pasid);
 747
 748         args->num_of_nodes = 0;
 749
 750         mutex_lock(&p->mutex);
 751
 752         /*if the process-device list isn't empty*/
 753         if (kfd_has_process_device_data(p)) {
 754                 /* Run over all pdd of the process */
 755                 pdd = kfd_get_first_process_device_data(p);
 756                 do {
 757                         pAperture =
 758                                 &args->process_apertures[args->num_of_nodes];
 759                         pAperture->gpu_id = pdd->dev->id;
 760                         pAperture->lds_base = pdd->lds_base;
 761                         pAperture->lds_limit = pdd->lds_limit;
 762                         pAperture->gpuvm_base = pdd->gpuvm_base;
 763                         pAperture->gpuvm_limit = pdd->gpuvm_limit;
 764                         pAperture->scratch_base = pdd->scratch_base;
 765                         pAperture->scratch_limit = pdd->scratch_limit;
 766
 767                         dev_dbg(kfd_device,
 768                                 "node id %u\n", args->num_of_nodes);
 769                         dev_dbg(kfd_device,
 770                                 "gpu id %u\n", pdd->dev->id);
 771                         dev_dbg(kfd_device,
 772                                 "lds_base %llX\n", pdd->lds_base);
 773                         dev_dbg(kfd_device,
 774                                 "lds_limit %llX\n", pdd->lds_limit);
 775                         dev_dbg(kfd_device,
 776                                 "gpuvm_base %llX\n", pdd->gpuvm_base);
 777                         dev_dbg(kfd_device,
 778                                 "gpuvm_limit %llX\n", pdd->gpuvm_limit);
 779                         dev_dbg(kfd_device,
 780                                 "scratch_base %llX\n", pdd->scratch_base);
 781                         dev_dbg(kfd_device,
 782                                 "scratch_limit %llX\n", pdd->scratch_limit);
 783
 784                         args->num_of_nodes++;
 785                 } while ((pdd = kfd_get_next_process_device_data(p, pdd)) != NULL &&
 786                                 (args->num_of_nodes < NUM_OF_SUPPORTED_GPUS));
 787         }
 788
 789         mutex_unlock(&p->mutex);
 790
 791         return 0;
 792 }
 793
 794 static int kfd_ioctl_create_event(struct file *filp, struct kfd_process *p,
 795                                         void *data)
 796 {
 797         struct kfd_ioctl_create_event_args *args = data;
 798         int err;
 799
 800         err = kfd_event_create(filp, p, args->event_type,
 801                                 args->auto_reset != 0, args->node_id,
 802                                 &args->event_id, &args->event_trigger_data,
 803                                 &args->event_page_offset,
 804                                 &args->event_slot_index);
 805
 806         return err;
 807 }
 808
 809 static int kfd_ioctl_destroy_event(struct file *filp, struct kfd_process *p,
 810                                         void *data)
 811 {
 812         struct kfd_ioctl_destroy_event_args *args = data;
 813
 814         return kfd_event_destroy(p, args->event_id);
 815 }
 816
 817 static int kfd_ioctl_set_event(struct file *filp, struct kfd_process *p,
 818                                 void *data)
 819 {
 820         struct kfd_ioctl_set_event_args *args = data;
 821
 822         return kfd_set_event(p, args->event_id);
 823 }
 824
 825 static int kfd_ioctl_reset_event(struct file *filp, struct kfd_process *p,
 826                                 void *data)
 827 {
 828         struct kfd_ioctl_reset_event_args *args = data;
 829
 830         return kfd_reset_event(p, args->event_id);
 831 }
 832
 833 static int kfd_ioctl_wait_events(struct file *filp, struct kfd_process *p,
 834                                 void *data)
 835 {
 836         struct kfd_ioctl_wait_events_args *args = data;
 837         enum kfd_event_wait_result wait_result;
 838         int err;
 839
 840         err = kfd_wait_on_events(p, args->num_events,
 841                         (void __user *)args->events_ptr,
 842                         (args->wait_for_all != 0),
 843                         args->timeout, &wait_result);
 844
 845         args->wait_result = wait_result;
 846
 847         return err;
 848 }
 849
 850 #define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \
 851         [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
 852
 853 /** Ioctl table */
 854 static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
 855         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_VERSION,
 856                         kfd_ioctl_get_version, 0),
 857
 858         AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_QUEUE,
 859                         kfd_ioctl_create_queue, 0),
 860
 861         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_QUEUE,
 862                         kfd_ioctl_destroy_queue, 0),
 863
 864         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_MEMORY_POLICY,
 865                         kfd_ioctl_set_memory_policy, 0),
 866
 867         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_CLOCK_COUNTERS,
 868                         kfd_ioctl_get_clock_counters, 0),
 869
 870         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES,
 871                         kfd_ioctl_get_process_apertures, 0),
 872
 873         AMDKFD_IOCTL_DEF(AMDKFD_IOC_UPDATE_QUEUE,
 874                         kfd_ioctl_update_queue, 0),
 875
 876         AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_EVENT,
 877                         kfd_ioctl_create_event, 0),
 878
 879         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_EVENT,
 880                         kfd_ioctl_destroy_event, 0),
 881
 882         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_EVENT,
 883                         kfd_ioctl_set_event, 0),
 884
 885         AMDKFD_IOCTL_DEF(AMDKFD_IOC_RESET_EVENT,
 886                         kfd_ioctl_reset_event, 0),
 887
 888         AMDKFD_IOCTL_DEF(AMDKFD_IOC_WAIT_EVENTS,
 889                         kfd_ioctl_wait_events, 0),
 890
 891         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_REGISTER,
 892                         kfd_ioctl_dbg_register, 0),
 893
 894         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_UNREGISTER,
 895                         kfd_ioctl_dbg_unrgesiter, 0),
 896
 897         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_ADDRESS_WATCH,
 898                         kfd_ioctl_dbg_address_watch, 0),
 899
 900         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_WAVE_CONTROL,
 901                         kfd_ioctl_dbg_wave_control, 0),
 902 };
 903
 904 #define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls)
 905
 906 static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
 907 {
 908         struct kfd_process *process;
 909         amdkfd_ioctl_t *func;
 910         const struct amdkfd_ioctl_desc *ioctl = NULL;
 911         unsigned int nr = _IOC_NR(cmd);
 912         char stack_kdata[128];
 913         char *kdata = NULL;
 914         unsigned int usize, asize;
 915         int retcode = -EINVAL;
 916
 917         if (nr >= AMDKFD_CORE_IOCTL_COUNT)
 918                 goto err_i1;
 919
 920         if ((nr >= AMDKFD_COMMAND_START) && (nr < AMDKFD_COMMAND_END)) {
 921                 u32 amdkfd_size;
 922
 923                 ioctl = &amdkfd_ioctls[nr];
 924
 925                 amdkfd_size = _IOC_SIZE(ioctl->cmd);
 926                 usize = asize = _IOC_SIZE(cmd);
 927                 if (amdkfd_size > asize)
 928                         asize = amdkfd_size;
 929
 930                 cmd = ioctl->cmd;
 931         } else
 932                 goto err_i1;
 933
 934         dev_dbg(kfd_device, "ioctl cmd 0x%x (#%d), arg 0x%lx\n", cmd, nr, arg);
 935
 936         process = kfd_get_process(current);
 937         if (IS_ERR(process)) {
 938                 dev_dbg(kfd_device, "no process\n");
 939                 goto err_i1;
 940         }
 941
 942         /* Do not trust userspace, use our own definition */
 943         func = ioctl->func;
 944
 945         if (unlikely(!func)) {
 946                 dev_dbg(kfd_device, "no function\n");
 947                 retcode = -EINVAL;
 948                 goto err_i1;
 949         }
 950
 951         if (cmd & (IOC_IN | IOC_OUT)) {
 952                 if (asize <= sizeof(stack_kdata)) {
 953                         kdata = stack_kdata;
 954                 } else {
 955                         kdata = kmalloc(asize, GFP_KERNEL);
 956                         if (!kdata) {
 957                                 retcode = -ENOMEM;
 958                                 goto err_i1;
 959                         }
 960                 }
 961                 if (asize > usize)
 962                         memset(kdata + usize, 0, asize - usize);
 963         }
 964
 965         if (cmd & IOC_IN) {
 966                 if (copy_from_user(kdata, (void __user *)arg, usize) != 0) {
 967                         retcode = -EFAULT;
 968                         goto err_i1;
 969                 }
 970         } else if (cmd & IOC_OUT) {
 971                 memset(kdata, 0, usize);
 972         }
 973
 974         retcode = func(filep, process, kdata);
 975
 976         if (cmd & IOC_OUT)
 977                 if (copy_to_user((void __user *)arg, kdata, usize) != 0)
 978                         retcode = -EFAULT;
 979
 980 err_i1:
 981         if (!ioctl)
 982                 dev_dbg(kfd_device, "invalid ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
 983                           task_pid_nr(current), cmd, nr);
 984
 985         if (kdata != stack_kdata)
 986                 kfree(kdata);
 987
 988         if (retcode)
 989                 dev_dbg(kfd_device, "ret = %d\n", retcode);
 990
 991         return retcode;
 992 }
 993
 994 static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
 995 {
 996         struct kfd_process *process;
 997
 998         process = kfd_get_process(current);
 999         if (IS_ERR(process))
1000                 return PTR_ERR(process);
1001
1002         if ((vma->vm_pgoff & KFD_MMAP_DOORBELL_MASK) ==
1003                         KFD_MMAP_DOORBELL_MASK) {
1004                 vma->vm_pgoff = vma->vm_pgoff ^ KFD_MMAP_DOORBELL_MASK;
1005                 return kfd_doorbell_mmap(process, vma);
1006         } else if ((vma->vm_pgoff & KFD_MMAP_EVENTS_MASK) ==
1007                         KFD_MMAP_EVENTS_MASK) {
1008                 vma->vm_pgoff = vma->vm_pgoff ^ KFD_MMAP_EVENTS_MASK;
1009                 return kfd_event_mmap(process, vma);
1010         }
1011
1012         return -EFAULT;
1013 }