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 = is_compat_task();
 111
 112         if (is_32bit_user_mode == true) {
 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         int err = 0;
 135
 136         args->major_version = KFD_IOCTL_MAJOR_VERSION;
 137         args->minor_version = KFD_IOCTL_MINOR_VERSION;
 138
 139         return err;
 140 }
 141
 142 static int set_queue_properties_from_user(struct queue_properties *q_properties,
 143                                 struct kfd_ioctl_create_queue_args *args)
 144 {
 145         if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
 146                 pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
 147                 return -EINVAL;
 148         }
 149
 150         if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
 151                 pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
 152                 return -EINVAL;
 153         }
 154
 155         if ((args->ring_base_address) &&
 156                 (!access_ok(VERIFY_WRITE,
 157                         (const void __user *) args->ring_base_address,
 158                         sizeof(uint64_t)))) {
 159                 pr_err("kfd: can't access ring base address\n");
 160                 return -EFAULT;
 161         }
 162
 163         if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
 164                 pr_err("kfd: ring size must be a power of 2 or 0\n");
 165                 return -EINVAL;
 166         }
 167
 168         if (!access_ok(VERIFY_WRITE,
 169                         (const void __user *) args->read_pointer_address,
 170                         sizeof(uint32_t))) {
 171                 pr_err("kfd: can't access read pointer\n");
 172                 return -EFAULT;
 173         }
 174
 175         if (!access_ok(VERIFY_WRITE,
 176                         (const void __user *) args->write_pointer_address,
 177                         sizeof(uint32_t))) {
 178                 pr_err("kfd: can't access write pointer\n");
 179                 return -EFAULT;
 180         }
 181
 182         if (args->eop_buffer_address &&
 183                 !access_ok(VERIFY_WRITE,
 184                         (const void __user *) args->eop_buffer_address,
 185                         sizeof(uint32_t))) {
 186                 pr_debug("kfd: can't access eop buffer");
 187                 return -EFAULT;
 188         }
 189
 190         if (args->ctx_save_restore_address &&
 191                 !access_ok(VERIFY_WRITE,
 192                         (const void __user *) args->ctx_save_restore_address,
 193                         sizeof(uint32_t))) {
 194                 pr_debug("kfd: 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         if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE ||
 211                 args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
 212                 q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
 213         else if (args->queue_type == KFD_IOC_QUEUE_TYPE_SDMA)
 214                 q_properties->type = KFD_QUEUE_TYPE_SDMA;
 215         else
 216                 return -ENOTSUPP;
 217
 218         if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
 219                 q_properties->format = KFD_QUEUE_FORMAT_AQL;
 220         else
 221                 q_properties->format = KFD_QUEUE_FORMAT_PM4;
 222
 223         pr_debug("Queue Percentage (%d, %d)\n",
 224                         q_properties->queue_percent, args->queue_percentage);
 225
 226         pr_debug("Queue Priority (%d, %d)\n",
 227                         q_properties->priority, args->queue_priority);
 228
 229         pr_debug("Queue Address (0x%llX, 0x%llX)\n",
 230                         q_properties->queue_address, args->ring_base_address);
 231
 232         pr_debug("Queue Size (0x%llX, %u)\n",
 233                         q_properties->queue_size, args->ring_size);
 234
 235         pr_debug("Queue r/w Pointers (0x%llX, 0x%llX)\n",
 236                         (uint64_t) q_properties->read_ptr,
 237                         (uint64_t) q_properties->write_ptr);
 238
 239         pr_debug("Queue Format (%d)\n", q_properties->format);
 240
 241         pr_debug("Queue EOP (0x%llX)\n", q_properties->eop_ring_buffer_address);
 242
 243         pr_debug("Queue CTX save arex (0x%llX)\n",
 244                         q_properties->ctx_save_restore_area_address);
 245
 246         return 0;
 247 }
 248
 249 static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
 250                                         void *data)
 251 {
 252         struct kfd_ioctl_create_queue_args *args = data;
 253         struct kfd_dev *dev;
 254         int err = 0;
 255         unsigned int queue_id;
 256         struct kfd_process_device *pdd;
 257         struct queue_properties q_properties;
 258
 259         memset(&q_properties, 0, sizeof(struct queue_properties));
 260
 261         pr_debug("kfd: creating queue ioctl\n");
 262
 263         err = set_queue_properties_from_user(&q_properties, args);
 264         if (err)
 265                 return err;
 266
 267         pr_debug("kfd: looking for gpu id 0x%x\n", args->gpu_id);
 268         dev = kfd_device_by_id(args->gpu_id);
 269         if (dev == NULL) {
 270                 pr_debug("kfd: gpu id 0x%x was not found\n", args->gpu_id);
 271                 return -EINVAL;
 272         }
 273
 274         mutex_lock(&p->mutex);
 275
 276         pdd = kfd_bind_process_to_device(dev, p);
 277         if (IS_ERR(pdd)) {
 278                 err = -ESRCH;
 279                 goto err_bind_process;
 280         }
 281
 282         pr_debug("kfd: creating queue for PASID %d on GPU 0x%x\n",
 283                         p->pasid,
 284                         dev->id);
 285
 286         err = pqm_create_queue(&p->pqm, dev, filep, &q_properties,
 287                                 0, q_properties.type, &queue_id);
 288         if (err != 0)
 289                 goto err_create_queue;
 290
 291         args->queue_id = queue_id;
 292
 293
 294         /* Return gpu_id as doorbell offset for mmap usage */
 295         args->doorbell_offset = (KFD_MMAP_DOORBELL_MASK | args->gpu_id);
 296         args->doorbell_offset <<= PAGE_SHIFT;
 297
 298         mutex_unlock(&p->mutex);
 299
 300         pr_debug("kfd: queue id %d was created successfully\n", args->queue_id);
 301
 302         pr_debug("ring buffer address == 0x%016llX\n",
 303                         args->ring_base_address);
 304
 305         pr_debug("read ptr address    == 0x%016llX\n",
 306                         args->read_pointer_address);
 307
 308         pr_debug("write ptr address   == 0x%016llX\n",
 309                         args->write_pointer_address);
 310
 311         return 0;
 312
 313 err_create_queue:
 314 err_bind_process:
 315         mutex_unlock(&p->mutex);
 316         return err;
 317 }
 318
 319 static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p,
 320                                         void *data)
 321 {
 322         int retval;
 323         struct kfd_ioctl_destroy_queue_args *args = data;
 324
 325         pr_debug("kfd: destroying queue id %d for PASID %d\n",
 326                                 args->queue_id,
 327                                 p->pasid);
 328
 329         mutex_lock(&p->mutex);
 330
 331         retval = pqm_destroy_queue(&p->pqm, args->queue_id);
 332
 333         mutex_unlock(&p->mutex);
 334         return retval;
 335 }
 336
 337 static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p,
 338                                         void *data)
 339 {
 340         int retval;
 341         struct kfd_ioctl_update_queue_args *args = data;
 342         struct queue_properties properties;
 343
 344         if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
 345                 pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
 346                 return -EINVAL;
 347         }
 348
 349         if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
 350                 pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
 351                 return -EINVAL;
 352         }
 353
 354         if ((args->ring_base_address) &&
 355                 (!access_ok(VERIFY_WRITE,
 356                         (const void __user *) args->ring_base_address,
 357                         sizeof(uint64_t)))) {
 358                 pr_err("kfd: can't access ring base address\n");
 359                 return -EFAULT;
 360         }
 361
 362         if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
 363                 pr_err("kfd: ring size must be a power of 2 or 0\n");
 364                 return -EINVAL;
 365         }
 366
 367         properties.queue_address = args->ring_base_address;
 368         properties.queue_size = args->ring_size;
 369         properties.queue_percent = args->queue_percentage;
 370         properties.priority = args->queue_priority;
 371
 372         pr_debug("kfd: updating queue id %d for PASID %d\n",
 373                         args->queue_id, p->pasid);
 374
 375         mutex_lock(&p->mutex);
 376
 377         retval = pqm_update_queue(&p->pqm, args->queue_id, &properties);
 378
 379         mutex_unlock(&p->mutex);
 380
 381         return retval;
 382 }
 383
 384 static int kfd_ioctl_set_memory_policy(struct file *filep,
 385                                         struct kfd_process *p, void *data)
 386 {
 387         struct kfd_ioctl_set_memory_policy_args *args = data;
 388         struct kfd_dev *dev;
 389         int err = 0;
 390         struct kfd_process_device *pdd;
 391         enum cache_policy default_policy, alternate_policy;
 392
 393         if (args->default_policy != KFD_IOC_CACHE_POLICY_COHERENT
 394             && args->default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
 395                 return -EINVAL;
 396         }
 397
 398         if (args->alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
 399             && args->alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
 400                 return -EINVAL;
 401         }
 402
 403         dev = kfd_device_by_id(args->gpu_id);
 404         if (dev == NULL)
 405                 return -EINVAL;
 406
 407         mutex_lock(&p->mutex);
 408
 409         pdd = kfd_bind_process_to_device(dev, p);
 410         if (IS_ERR(pdd)) {
 411                 err = -ESRCH;
 412                 goto out;
 413         }
 414
 415         default_policy = (args->default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
 416                          ? cache_policy_coherent : cache_policy_noncoherent;
 417
 418         alternate_policy =
 419                 (args->alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
 420                    ? cache_policy_coherent : cache_policy_noncoherent;
 421
 422         if (!dev->dqm->ops.set_cache_memory_policy(dev->dqm,
 423                                 &pdd->qpd,
 424                                 default_policy,
 425                                 alternate_policy,
 426                                 (void __user *)args->alternate_aperture_base,
 427                                 args->alternate_aperture_size))
 428                 err = -EINVAL;
 429
 430 out:
 431         mutex_unlock(&p->mutex);
 432
 433         return err;
 434 }
 435
 436 static int kfd_ioctl_dbg_register(struct file *filep,
 437                                 struct kfd_process *p, void *data)
 438 {
 439         struct kfd_ioctl_dbg_register_args *args = data;
 440         struct kfd_dev *dev;
 441         struct kfd_dbgmgr *dbgmgr_ptr;
 442         struct kfd_process_device *pdd;
 443         bool create_ok;
 444         long status = 0;
 445
 446         dev = kfd_device_by_id(args->gpu_id);
 447         if (dev == NULL)
 448                 return -EINVAL;
 449
 450         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 451                 pr_debug("kfd_ioctl_dbg_register not supported on CZ\n");
 452                 return -EINVAL;
 453         }
 454
 455         mutex_lock(kfd_get_dbgmgr_mutex());
 456         mutex_lock(&p->mutex);
 457
 458         /*
 459          * make sure that we have pdd, if this the first queue created for
 460          * this process
 461          */
 462         pdd = kfd_bind_process_to_device(dev, p);
 463         if (IS_ERR(pdd)) {
 464                 mutex_unlock(&p->mutex);
 465                 mutex_unlock(kfd_get_dbgmgr_mutex());
 466                 return PTR_ERR(pdd);
 467         }
 468
 469         if (dev->dbgmgr == NULL) {
 470                 /* In case of a legal call, we have no dbgmgr yet */
 471                 create_ok = kfd_dbgmgr_create(&dbgmgr_ptr, dev);
 472                 if (create_ok) {
 473                         status = kfd_dbgmgr_register(dbgmgr_ptr, p);
 474                         if (status != 0)
 475                                 kfd_dbgmgr_destroy(dbgmgr_ptr);
 476                         else
 477                                 dev->dbgmgr = dbgmgr_ptr;
 478                 }
 479         } else {
 480                 pr_debug("debugger already registered\n");
 481                 status = -EINVAL;
 482         }
 483
 484         mutex_unlock(&p->mutex);
 485         mutex_unlock(kfd_get_dbgmgr_mutex());
 486
 487         return status;
 488 }
 489
 490 static int kfd_ioctl_dbg_unrgesiter(struct file *filep,
 491                                 struct kfd_process *p, void *data)
 492 {
 493         struct kfd_ioctl_dbg_unregister_args *args = data;
 494         struct kfd_dev *dev;
 495         long status;
 496
 497         dev = kfd_device_by_id(args->gpu_id);
 498         if (dev == NULL)
 499                 return -EINVAL;
 500
 501         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 502                 pr_debug("kfd_ioctl_dbg_unrgesiter not supported on CZ\n");
 503                 return -EINVAL;
 504         }
 505
 506         mutex_lock(kfd_get_dbgmgr_mutex());
 507
 508         status = kfd_dbgmgr_unregister(dev->dbgmgr, p);
 509         if (status == 0) {
 510                 kfd_dbgmgr_destroy(dev->dbgmgr);
 511                 dev->dbgmgr = NULL;
 512         }
 513
 514         mutex_unlock(kfd_get_dbgmgr_mutex());
 515
 516         return status;
 517 }
 518
 519 /*
 520  * Parse and generate variable size data structure for address watch.
 521  * Total size of the buffer and # watch points is limited in order
 522  * to prevent kernel abuse. (no bearing to the much smaller HW limitation
 523  * which is enforced by dbgdev module)
 524  * please also note that the watch address itself are not "copied from user",
 525  * since it be set into the HW in user mode values.
 526  *
 527  */
 528 static int kfd_ioctl_dbg_address_watch(struct file *filep,
 529                                         struct kfd_process *p, void *data)
 530 {
 531         struct kfd_ioctl_dbg_address_watch_args *args = data;
 532         struct kfd_dev *dev;
 533         struct dbg_address_watch_info aw_info;
 534         unsigned char *args_buff;
 535         long status;
 536         void __user *cmd_from_user;
 537         uint64_t watch_mask_value = 0;
 538         unsigned int args_idx = 0;
 539
 540         memset((void *) &aw_info, 0, sizeof(struct dbg_address_watch_info));
 541
 542         dev = kfd_device_by_id(args->gpu_id);
 543         if (dev == NULL)
 544                 return -EINVAL;
 545
 546         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 547                 pr_debug("kfd_ioctl_dbg_wave_control not supported on CZ\n");
 548                 return -EINVAL;
 549         }
 550
 551         cmd_from_user = (void __user *) args->content_ptr;
 552
 553         /* Validate arguments */
 554
 555         if ((args->buf_size_in_bytes > MAX_ALLOWED_AW_BUFF_SIZE) ||
 556                 (args->buf_size_in_bytes <= sizeof(*args) + sizeof(int) * 2) ||
 557                 (cmd_from_user == NULL))
 558                 return -EINVAL;
 559
 560         /* this is the actual buffer to work with */
 561         args_buff = memdup_user(cmd_from_user,
 562                                 args->buf_size_in_bytes - sizeof(*args));
 563         if (IS_ERR(args_buff))
 564                 return PTR_ERR(args_buff);
 565
 566         aw_info.process = p;
 567
 568         aw_info.num_watch_points = *((uint32_t *)(&args_buff[args_idx]));
 569         args_idx += sizeof(aw_info.num_watch_points);
 570
 571         aw_info.watch_mode = (enum HSA_DBG_WATCH_MODE *) &args_buff[args_idx];
 572         args_idx += sizeof(enum HSA_DBG_WATCH_MODE) * aw_info.num_watch_points;
 573
 574         /*
 575          * set watch address base pointer to point on the array base
 576          * within args_buff
 577          */
 578         aw_info.watch_address = (uint64_t *) &args_buff[args_idx];
 579
 580         /* skip over the addresses buffer */
 581         args_idx += sizeof(aw_info.watch_address) * aw_info.num_watch_points;
 582
 583         if (args_idx >= args->buf_size_in_bytes - sizeof(*args)) {
 584                 kfree(args_buff);
 585                 return -EINVAL;
 586         }
 587
 588         watch_mask_value = (uint64_t) args_buff[args_idx];
 589
 590         if (watch_mask_value > 0) {
 591                 /*
 592                  * There is an array of masks.
 593                  * set watch mask base pointer to point on the array base
 594                  * within args_buff
 595                  */
 596                 aw_info.watch_mask = (uint64_t *) &args_buff[args_idx];
 597
 598                 /* skip over the masks buffer */
 599                 args_idx += sizeof(aw_info.watch_mask) *
 600                                 aw_info.num_watch_points;
 601         } else {
 602                 /* just the NULL mask, set to NULL and skip over it */
 603                 aw_info.watch_mask = NULL;
 604                 args_idx += sizeof(aw_info.watch_mask);
 605         }
 606
 607         if (args_idx >= args->buf_size_in_bytes - sizeof(args)) {
 608                 kfree(args_buff);
 609                 return -EINVAL;
 610         }
 611
 612         /* Currently HSA Event is not supported for DBG */
 613         aw_info.watch_event = NULL;
 614
 615         mutex_lock(kfd_get_dbgmgr_mutex());
 616
 617         status = kfd_dbgmgr_address_watch(dev->dbgmgr, &aw_info);
 618
 619         mutex_unlock(kfd_get_dbgmgr_mutex());
 620
 621         kfree(args_buff);
 622
 623         return status;
 624 }
 625
 626 /* Parse and generate fixed size data structure for wave control */
 627 static int kfd_ioctl_dbg_wave_control(struct file *filep,
 628                                         struct kfd_process *p, void *data)
 629 {
 630         struct kfd_ioctl_dbg_wave_control_args *args = data;
 631         struct kfd_dev *dev;
 632         struct dbg_wave_control_info wac_info;
 633         unsigned char *args_buff;
 634         uint32_t computed_buff_size;
 635         long status;
 636         void __user *cmd_from_user;
 637         unsigned int args_idx = 0;
 638
 639         memset((void *) &wac_info, 0, sizeof(struct dbg_wave_control_info));
 640
 641         /* we use compact form, independent of the packing attribute value */
 642         computed_buff_size = sizeof(*args) +
 643                                 sizeof(wac_info.mode) +
 644                                 sizeof(wac_info.operand) +
 645                                 sizeof(wac_info.dbgWave_msg.DbgWaveMsg) +
 646                                 sizeof(wac_info.dbgWave_msg.MemoryVA) +
 647                                 sizeof(wac_info.trapId);
 648
 649         dev = kfd_device_by_id(args->gpu_id);
 650         if (dev == NULL)
 651                 return -EINVAL;
 652
 653         if (dev->device_info->asic_family == CHIP_CARRIZO) {
 654                 pr_debug("kfd_ioctl_dbg_wave_control not supported on CZ\n");
 655                 return -EINVAL;
 656         }
 657
 658         /* input size must match the computed "compact" size */
 659         if (args->buf_size_in_bytes != computed_buff_size) {
 660                 pr_debug("size mismatch, computed : actual %u : %u\n",
 661                                 args->buf_size_in_bytes, computed_buff_size);
 662                 return -EINVAL;
 663         }
 664
 665         cmd_from_user = (void __user *) args->content_ptr;
 666
 667         if (cmd_from_user == NULL)
 668                 return -EINVAL;
 669
 670         /* copy the entire buffer from user */
 671
 672         args_buff = memdup_user(cmd_from_user,
 673                                 args->buf_size_in_bytes - sizeof(*args));
 674         if (IS_ERR(args_buff))
 675                 return PTR_ERR(args_buff);
 676
 677         /* move ptr to the start of the "pay-load" area */
 678         wac_info.process = p;
 679
 680         wac_info.operand = *((enum HSA_DBG_WAVEOP *)(&args_buff[args_idx]));
 681         args_idx += sizeof(wac_info.operand);
 682
 683         wac_info.mode = *((enum HSA_DBG_WAVEMODE *)(&args_buff[args_idx]));
 684         args_idx += sizeof(wac_info.mode);
 685
 686         wac_info.trapId = *((uint32_t *)(&args_buff[args_idx]));
 687         args_idx += sizeof(wac_info.trapId);
 688
 689         wac_info.dbgWave_msg.DbgWaveMsg.WaveMsgInfoGen2.Value =
 690                                         *((uint32_t *)(&args_buff[args_idx]));
 691         wac_info.dbgWave_msg.MemoryVA = NULL;
 692
 693         mutex_lock(kfd_get_dbgmgr_mutex());
 694
 695         pr_debug("Calling dbg manager process %p, operand %u, mode %u, trapId %u, message %u\n",
 696                         wac_info.process, wac_info.operand,
 697                         wac_info.mode, wac_info.trapId,
 698                         wac_info.dbgWave_msg.DbgWaveMsg.WaveMsgInfoGen2.Value);
 699
 700         status = kfd_dbgmgr_wave_control(dev->dbgmgr, &wac_info);
 701
 702         pr_debug("Returned status of dbg manager is %ld\n", status);
 703
 704         mutex_unlock(kfd_get_dbgmgr_mutex());
 705
 706         kfree(args_buff);
 707
 708         return status;
 709 }
 710
 711 static int kfd_ioctl_get_clock_counters(struct file *filep,
 712                                 struct kfd_process *p, void *data)
 713 {
 714         struct kfd_ioctl_get_clock_counters_args *args = data;
 715         struct kfd_dev *dev;
 716         struct timespec64 time;
 717
 718         dev = kfd_device_by_id(args->gpu_id);
 719         if (dev == NULL)
 720                 return -EINVAL;
 721
 722         /* Reading GPU clock counter from KGD */
 723         args->gpu_clock_counter =
 724                 dev->kfd2kgd->get_gpu_clock_counter(dev->kgd);
 725
 726         /* No access to rdtsc. Using raw monotonic time */
 727         getrawmonotonic64(&time);
 728         args->cpu_clock_counter = (uint64_t)timespec64_to_ns(&time);
 729
 730         get_monotonic_boottime64(&time);
 731         args->system_clock_counter = (uint64_t)timespec64_to_ns(&time);
 732
 733         /* Since the counter is in nano-seconds we use 1GHz frequency */
 734         args->system_clock_freq = 1000000000;
 735
 736         return 0;
 737 }
 738
 739
 740 static int kfd_ioctl_get_process_apertures(struct file *filp,
 741                                 struct kfd_process *p, void *data)
 742 {
 743         struct kfd_ioctl_get_process_apertures_args *args = data;
 744         struct kfd_process_device_apertures *pAperture;
 745         struct kfd_process_device *pdd;
 746
 747         dev_dbg(kfd_device, "get apertures for PASID %d", p->pasid);
 748
 749         args->num_of_nodes = 0;
 750
 751         mutex_lock(&p->mutex);
 752
 753         /*if the process-device list isn't empty*/
 754         if (kfd_has_process_device_data(p)) {
 755                 /* Run over all pdd of the process */
 756                 pdd = kfd_get_first_process_device_data(p);
 757                 do {
 758                         pAperture =
 759                                 &args->process_apertures[args->num_of_nodes];
 760                         pAperture->gpu_id = pdd->dev->id;
 761                         pAperture->lds_base = pdd->lds_base;
 762                         pAperture->lds_limit = pdd->lds_limit;
 763                         pAperture->gpuvm_base = pdd->gpuvm_base;
 764                         pAperture->gpuvm_limit = pdd->gpuvm_limit;
 765                         pAperture->scratch_base = pdd->scratch_base;
 766                         pAperture->scratch_limit = pdd->scratch_limit;
 767
 768                         dev_dbg(kfd_device,
 769                                 "node id %u\n", args->num_of_nodes);
 770                         dev_dbg(kfd_device,
 771                                 "gpu id %u\n", pdd->dev->id);
 772                         dev_dbg(kfd_device,
 773                                 "lds_base %llX\n", pdd->lds_base);
 774                         dev_dbg(kfd_device,
 775                                 "lds_limit %llX\n", pdd->lds_limit);
 776                         dev_dbg(kfd_device,
 777                                 "gpuvm_base %llX\n", pdd->gpuvm_base);
 778                         dev_dbg(kfd_device,
 779                                 "gpuvm_limit %llX\n", pdd->gpuvm_limit);
 780                         dev_dbg(kfd_device,
 781                                 "scratch_base %llX\n", pdd->scratch_base);
 782                         dev_dbg(kfd_device,
 783                                 "scratch_limit %llX\n", pdd->scratch_limit);
 784
 785                         args->num_of_nodes++;
 786                 } while ((pdd = kfd_get_next_process_device_data(p, pdd)) != NULL &&
 787                                 (args->num_of_nodes < NUM_OF_SUPPORTED_GPUS));
 788         }
 789
 790         mutex_unlock(&p->mutex);
 791
 792         return 0;
 793 }
 794
 795 static int kfd_ioctl_create_event(struct file *filp, struct kfd_process *p,
 796                                         void *data)
 797 {
 798         struct kfd_ioctl_create_event_args *args = data;
 799         int err;
 800
 801         err = kfd_event_create(filp, p, args->event_type,
 802                                 args->auto_reset != 0, args->node_id,
 803                                 &args->event_id, &args->event_trigger_data,
 804                                 &args->event_page_offset,
 805                                 &args->event_slot_index);
 806
 807         return err;
 808 }
 809
 810 static int kfd_ioctl_destroy_event(struct file *filp, struct kfd_process *p,
 811                                         void *data)
 812 {
 813         struct kfd_ioctl_destroy_event_args *args = data;
 814
 815         return kfd_event_destroy(p, args->event_id);
 816 }
 817
 818 static int kfd_ioctl_set_event(struct file *filp, struct kfd_process *p,
 819                                 void *data)
 820 {
 821         struct kfd_ioctl_set_event_args *args = data;
 822
 823         return kfd_set_event(p, args->event_id);
 824 }
 825
 826 static int kfd_ioctl_reset_event(struct file *filp, struct kfd_process *p,
 827                                 void *data)
 828 {
 829         struct kfd_ioctl_reset_event_args *args = data;
 830
 831         return kfd_reset_event(p, args->event_id);
 832 }
 833
 834 static int kfd_ioctl_wait_events(struct file *filp, struct kfd_process *p,
 835                                 void *data)
 836 {
 837         struct kfd_ioctl_wait_events_args *args = data;
 838         enum kfd_event_wait_result wait_result;
 839         int err;
 840
 841         err = kfd_wait_on_events(p, args->num_events,
 842                         (void __user *)args->events_ptr,
 843                         (args->wait_for_all != 0),
 844                         args->timeout, &wait_result);
 845
 846         args->wait_result = wait_result;
 847
 848         return err;
 849 }
 850
 851 #define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \
 852         [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
 853
 854 /** Ioctl table */
 855 static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
 856         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_VERSION,
 857                         kfd_ioctl_get_version, 0),
 858
 859         AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_QUEUE,
 860                         kfd_ioctl_create_queue, 0),
 861
 862         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_QUEUE,
 863                         kfd_ioctl_destroy_queue, 0),
 864
 865         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_MEMORY_POLICY,
 866                         kfd_ioctl_set_memory_policy, 0),
 867
 868         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_CLOCK_COUNTERS,
 869                         kfd_ioctl_get_clock_counters, 0),
 870
 871         AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES,
 872                         kfd_ioctl_get_process_apertures, 0),
 873
 874         AMDKFD_IOCTL_DEF(AMDKFD_IOC_UPDATE_QUEUE,
 875                         kfd_ioctl_update_queue, 0),
 876
 877         AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_EVENT,
 878                         kfd_ioctl_create_event, 0),
 879
 880         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_EVENT,
 881                         kfd_ioctl_destroy_event, 0),
 882
 883         AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_EVENT,
 884                         kfd_ioctl_set_event, 0),
 885
 886         AMDKFD_IOCTL_DEF(AMDKFD_IOC_RESET_EVENT,
 887                         kfd_ioctl_reset_event, 0),
 888
 889         AMDKFD_IOCTL_DEF(AMDKFD_IOC_WAIT_EVENTS,
 890                         kfd_ioctl_wait_events, 0),
 891
 892         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_REGISTER,
 893                         kfd_ioctl_dbg_register, 0),
 894
 895         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_UNREGISTER,
 896                         kfd_ioctl_dbg_unrgesiter, 0),
 897
 898         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_ADDRESS_WATCH,
 899                         kfd_ioctl_dbg_address_watch, 0),
 900
 901         AMDKFD_IOCTL_DEF(AMDKFD_IOC_DBG_WAVE_CONTROL,
 902                         kfd_ioctl_dbg_wave_control, 0),
 903 };
 904
 905 #define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls)
 906
 907 static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
 908 {
 909         struct kfd_process *process;
 910         amdkfd_ioctl_t *func;
 911         const struct amdkfd_ioctl_desc *ioctl = NULL;
 912         unsigned int nr = _IOC_NR(cmd);
 913         char stack_kdata[128];
 914         char *kdata = NULL;
 915         unsigned int usize, asize;
 916         int retcode = -EINVAL;
 917
 918         if (nr >= AMDKFD_CORE_IOCTL_COUNT)
 919                 goto err_i1;
 920
 921         if ((nr >= AMDKFD_COMMAND_START) && (nr < AMDKFD_COMMAND_END)) {
 922                 u32 amdkfd_size;
 923
 924                 ioctl = &amdkfd_ioctls[nr];
 925
 926                 amdkfd_size = _IOC_SIZE(ioctl->cmd);
 927                 usize = asize = _IOC_SIZE(cmd);
 928                 if (amdkfd_size > asize)
 929                         asize = amdkfd_size;
 930
 931                 cmd = ioctl->cmd;
 932         } else
 933                 goto err_i1;
 934
 935         dev_dbg(kfd_device, "ioctl cmd 0x%x (#%d), arg 0x%lx\n", cmd, nr, arg);
 936
 937         process = kfd_get_process(current);
 938         if (IS_ERR(process)) {
 939                 dev_dbg(kfd_device, "no process\n");
 940                 goto err_i1;
 941         }
 942
 943         /* Do not trust userspace, use our own definition */
 944         func = ioctl->func;
 945
 946         if (unlikely(!func)) {
 947                 dev_dbg(kfd_device, "no function\n");
 948                 retcode = -EINVAL;
 949                 goto err_i1;
 950         }
 951
 952         if (cmd & (IOC_IN | IOC_OUT)) {
 953                 if (asize <= sizeof(stack_kdata)) {
 954                         kdata = stack_kdata;
 955                 } else {
 956                         kdata = kmalloc(asize, GFP_KERNEL);
 957                         if (!kdata) {
 958                                 retcode = -ENOMEM;
 959                                 goto err_i1;
 960                         }
 961                 }
 962                 if (asize > usize)
 963                         memset(kdata + usize, 0, asize - usize);
 964         }
 965
 966         if (cmd & IOC_IN) {
 967                 if (copy_from_user(kdata, (void __user *)arg, usize) != 0) {
 968                         retcode = -EFAULT;
 969                         goto err_i1;
 970                 }
 971         } else if (cmd & IOC_OUT) {
 972                 memset(kdata, 0, usize);
 973         }
 974
 975         retcode = func(filep, process, kdata);
 976
 977         if (cmd & IOC_OUT)
 978                 if (copy_to_user((void __user *)arg, kdata, usize) != 0)
 979                         retcode = -EFAULT;
 980
 981 err_i1:
 982         if (!ioctl)
 983                 dev_dbg(kfd_device, "invalid ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
 984                           task_pid_nr(current), cmd, nr);
 985
 986         if (kdata != stack_kdata)
 987                 kfree(kdata);
 988
 989         if (retcode)
 990                 dev_dbg(kfd_device, "ret = %d\n", retcode);
 991
 992         return retcode;
 993 }
 994
 995 static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
 996 {
 997         struct kfd_process *process;
 998
 999         process = kfd_get_process(current);
1000         if (IS_ERR(process))
1001                 return PTR_ERR(process);
1002
1003         if ((vma->vm_pgoff & KFD_MMAP_DOORBELL_MASK) ==
1004                         KFD_MMAP_DOORBELL_MASK) {
1005                 vma->vm_pgoff = vma->vm_pgoff ^ KFD_MMAP_DOORBELL_MASK;
1006                 return kfd_doorbell_mmap(process, vma);
1007         } else if ((vma->vm_pgoff & KFD_MMAP_EVENTS_MASK) ==
1008                         KFD_MMAP_EVENTS_MASK) {
1009                 vma->vm_pgoff = vma->vm_pgoff ^ KFD_MMAP_EVENTS_MASK;
1010                 return kfd_event_mmap(process, vma);
1011         }
1012
1013         return -EFAULT;
1014 }