/** * \file drm_lock.c * IOCTLs for locking * * \author Rickard E. (Rik) Faith * \author Gareth Hughes */ /* * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com * * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #include "drmP.h" static int drm_notifier(void *priv); /** * Lock ioctl. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument, pointing to a drm_lock structure. * \return zero on success or negative number on failure. * * Add the current task to the lock wait queue, and attempt to take to lock. */ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv) { DECLARE_WAITQUEUE(entry, current); struct drm_lock *lock = data; int ret = 0; ++file_priv->lock_count; if (lock->context == DRM_KERNEL_CONTEXT) { DRM_ERROR("Process %d using kernel context %d\n", current->pid, lock->context); return -EINVAL; } DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n", lock->context, current->pid, dev->lock.hw_lock->lock, lock->flags); if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE)) if (lock->context < 0) return -EINVAL; add_wait_queue(&dev->lock.lock_queue, &entry); spin_lock_bh(&dev->lock.spinlock); dev->lock.user_waiters++; spin_unlock_bh(&dev->lock.spinlock); for (;;) { __set_current_state(TASK_INTERRUPTIBLE); if (!dev->lock.hw_lock) { /* Device has been unregistered */ ret = -EINTR; break; } if (drm_lock_take(&dev->lock, lock->context)) { dev->lock.file_priv = file_priv; dev->lock.lock_time = jiffies; atomic_inc(&dev->counts[_DRM_STAT_LOCKS]); break; /* Got lock */ } /* Contention */ schedule(); if (signal_pending(current)) { ret = -ERESTARTSYS; break; } } spin_lock_bh(&dev->lock.spinlock); dev->lock.user_waiters--; spin_unlock_bh(&dev->lock.spinlock); __set_current_state(TASK_RUNNING); remove_wait_queue(&dev->lock.lock_queue, &entry); DRM_DEBUG("%d %s\n", lock->context, ret ? "interrupted" : "has lock"); if (ret) return ret; /* don't set the block all signals on the master process for now * really probably not the correct answer but lets us debug xkb * xserver for now */ if (!file_priv->master) { sigemptyset(&dev->sigmask); sigaddset(&dev->sigmask, SIGSTOP); sigaddset(&dev->sigmask, SIGTSTP); sigaddset(&dev->sigmask, SIGTTIN); sigaddset(&dev->sigmask, SIGTTOU); dev->sigdata.context = lock->context; dev->sigdata.lock = dev->lock.hw_lock; block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask); } if (dev->driver->dma_ready && (lock->flags & _DRM_LOCK_READY)) dev->driver->dma_ready(dev); if (dev->driver->dma_quiescent && (lock->flags & _DRM_LOCK_QUIESCENT)) { if (dev->driver->dma_quiescent(dev)) { DRM_DEBUG("%d waiting for DMA quiescent\n", lock->context); return -EBUSY; } } if (dev->driver->kernel_context_switch && dev->last_context != lock->context) { dev->driver->kernel_context_switch(dev, dev->last_context, lock->context); } return 0; } /** * Unlock ioctl. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument, pointing to a drm_lock structure. * \return zero on success or negative number on failure. * * Transfer and free the lock. */ int drm_unlock(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_lock *lock = data; unsigned long irqflags; void (*tasklet_func)(struct drm_device *); if (lock->context == DRM_KERNEL_CONTEXT) { DRM_ERROR("Process %d using kernel context %d\n", current->pid, lock->context); return -EINVAL; } spin_lock_irqsave(&dev->tasklet_lock, irqflags); tasklet_func = dev->locked_tasklet_func; dev->locked_tasklet_func = NULL; spin_unlock_irqrestore(&dev->tasklet_lock, irqflags); if (tasklet_func != NULL) tasklet_func(dev); atomic_inc(&dev->counts[_DRM_STAT_UNLOCKS]); /* kernel_context_switch isn't used by any of the x86 drm * modules but is required by the Sparc driver. */ if (dev->driver->kernel_context_switch_unlock) dev->driver->kernel_context_switch_unlock(dev); else { if (drm_lock_free(&dev->lock,lock->context)) { /* FIXME: Should really bail out here. */ } } unblock_all_signals(); return 0; } /** * Take the heavyweight lock. * * \param lock lock pointer. * \param context locking context. * \return one if the lock is held, or zero otherwise. * * Attempt to mark the lock as held by the given context, via the \p cmpxchg instruction. */ int drm_lock_take(struct drm_lock_data *lock_data, unsigned int context) { unsigned int old, new, prev; volatile unsigned int *lock = &lock_data->hw_lock->lock; spin_lock_bh(&lock_data->spinlock); do { old = *lock; if (old & _DRM_LOCK_HELD) new = old | _DRM_LOCK_CONT; else { new = context | _DRM_LOCK_HELD | ((lock_data->user_waiters + lock_data->kernel_waiters > 1) ? _DRM_LOCK_CONT : 0); } prev = cmpxchg(lock, old, new); } while (prev != old); spin_unlock_bh(&lock_data->spinlock); /* Warn on recursive locking of user contexts. */ if (_DRM_LOCKING_CONTEXT(old) == context && _DRM_LOCK_IS_HELD(old)) { if (context != DRM_KERNEL_CONTEXT) { DRM_ERROR("%d holds heavyweight lock\n", context); } return 0; } return !_DRM_LOCK_IS_HELD(old); } /** * This takes a lock forcibly and hands it to context. Should ONLY be used * inside *_unlock to give lock to kernel before calling *_dma_schedule. * * \param dev DRM device. * \param lock lock pointer. * \param context locking context. * \return always one. * * Resets the lock file pointer. * Marks the lock as held by the given context, via the \p cmpxchg instruction. */ static int drm_lock_transfer(struct drm_lock_data *lock_data, unsigned int context) { unsigned int old, new, prev; volatile unsigned int *lock = &lock_data->hw_lock->lock; lock_data->file_priv = NULL; do { old = *lock; new = context | _DRM_LOCK_HELD; prev = cmpxchg(lock, old, new); } while (prev != old); return 1; } /** * Free lock. * * \param dev DRM device. * \param lock lock. * \param context context. * * Resets the lock file pointer. * Marks the lock as not held, via the \p cmpxchg instruction. Wakes any task * waiting on the lock queue. */ int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context) { unsigned int old, new, prev; volatile unsigned int *lock = &lock_data->hw_lock->lock; spin_lock_bh(&lock_data->spinlock); if (lock_data->kernel_waiters != 0) { drm_lock_transfer(lock_data, 0); lock_data->idle_has_lock = 1; spin_unlock_bh(&lock_data->spinlock); return 1; } spin_unlock_bh(&lock_data->spinlock); do { old = *lock; new = _DRM_LOCKING_CONTEXT(old); prev = cmpxchg(lock, old, new); } while (prev != old); if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) { DRM_ERROR("%d freed heavyweight lock held by %d\n", context, _DRM_LOCKING_CONTEXT(old)); return 1; } wake_up_interruptible(&lock_data->lock_queue); return 0; } /** * If we get here, it means that the process has called DRM_IOCTL_LOCK * without calling DRM_IOCTL_UNLOCK. * * If the lock is not held, then let the signal proceed as usual. If the lock * is held, then set the contended flag and keep the signal blocked. * * \param priv pointer to a drm_sigdata structure. * \return one if the signal should be delivered normally, or zero if the * signal should be blocked. */ static int drm_notifier(void *priv) { struct drm_sigdata *s = (struct drm_sigdata *) priv; unsigned int old, new, prev; /* Allow signal delivery if lock isn't held */ if (!s->lock || !_DRM_LOCK_IS_HELD(s->lock->lock) || _DRM_LOCKING_CONTEXT(s->lock->lock) != s->context) return 1; /* Otherwise, set flag to force call to drmUnlock */ do { old = s->lock->lock; new = old | _DRM_LOCK_CONT; prev = cmpxchg(&s->lock->lock, old, new); } while (prev != old); return 0; } /** * This function returns immediately and takes the hw lock * with the kernel context if it is free, otherwise it gets the highest priority when and if * it is eventually released. * * This guarantees that the kernel will _eventually_ have the lock _unless_ it is held * by a blocked process. (In the latter case an explicit wait for the hardware lock would cause * a deadlock, which is why the "idlelock" was invented). * * This should be sufficient to wait for GPU idle without * having to worry about starvation. */ void drm_idlelock_take(struct drm_lock_data *lock_data) { int ret = 0; spin_lock_bh(&lock_data->spinlock); lock_data->kernel_waiters++; if (!lock_data->idle_has_lock) { spin_unlock_bh(&lock_data->spinlock); ret = drm_lock_take(lock_data, DRM_KERNEL_CONTEXT); spin_lock_bh(&lock_data->spinlock); if (ret == 1) lock_data->idle_has_lock = 1; } spin_unlock_bh(&lock_data->spinlock); } EXPORT_SYMBOL(drm_idlelock_take); void drm_idlelock_release(struct drm_lock_data *lock_data) { unsigned int old, prev; volatile unsigned int *lock = &lock_data->hw_lock->lock; spin_lock_bh(&lock_data->spinlock); if (--lock_data->kernel_waiters == 0) { if (lock_data->idle_has_lock) { do { old = *lock; prev = cmpxchg(lock, old, DRM_KERNEL_CONTEXT); } while (prev != old); wake_up_interruptible(&lock_data->lock_queue); lock_data->idle_has_lock = 0; } } spin_unlock_bh(&lock_data->spinlock); } EXPORT_SYMBOL(drm_idlelock_release); int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv) { return (file_priv->lock_count && dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) && dev->lock.file_priv == file_priv); } EXPORT_SYMBOL(drm_i_have_hw_lock); ='#n253'>253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 
/* drmP.h -- Private header for Direct Rendering Manager -*- linux-c -*-
 * Created: Mon Jan  4 10:05:05 1999 by faith@precisioninsight.com
 */
/*-
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *    Rickard E. (Rik) Faith <faith@valinux.com>
 *    Gareth Hughes <gareth@valinux.com>
 *
 */

#ifndef _DRM_P_H_
#define _DRM_P_H_

#if defined(_KERNEL) || defined(__KERNEL__)

typedef struct drm_device drm_device_t;
typedef struct drm_file drm_file_t;

#include <sys/param.h>
#include <sys/queue.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/stat.h>
#if __FreeBSD_version >= 700000
#include <sys/priv.h>
#endif
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/fcntl.h>
#include <sys/uio.h>
#include <sys/filio.h>
#include <sys/sysctl.h>
#include <sys/bus.h>
#include <sys/signalvar.h>
#include <sys/poll.h>
#include <sys/tree.h>
#include <sys/taskqueue.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include <vm/vm_map.h>
#include <vm/vm_param.h>
#include <machine/param.h>
#include <machine/pmap.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/sysarch.h>
#include <sys/endian.h>
#include <sys/mman.h>
#if defined(__FreeBSD__)
#include <sys/rman.h>
#include <sys/memrange.h>
#if __FreeBSD_version >= 800004
#include <dev/agp/agpvar.h>
#else /* __FreeBSD_version >= 800004 */
#include <pci/agpvar.h>
#endif /* __FreeBSD_version >= 800004 */
#include <sys/agpio.h>
#if __FreeBSD_version >= 500000
#include <sys/mutex.h>
#include <dev/pci/pcivar.h>
#include <sys/selinfo.h>
#else /* __FreeBSD_version >= 500000 */
#include <pci/pcivar.h>
#include <sys/select.h>
#endif /* __FreeBSD_version < 500000 */
#elif defined(__NetBSD__)
#include <machine/mtrr.h>
#include <sys/vnode.h>
#include <sys/select.h>
#include <sys/device.h>
#include <sys/resourcevar.h>
#include <sys/lkm.h>
#include <sys/agpio.h>
#include <sys/ttycom.h>
#include <uvm/uvm.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/agpvar.h>
#elif defined(__OpenBSD__)
#include <sys/lkm.h>
#include <uvm/uvm.h>
#endif
#include <sys/bus.h>

#include "drm.h"
#include "drm_linux_list.h"
#include "drm_atomic.h"
#include "drm_internal.h"

#ifdef __FreeBSD__
#include <opt_drm.h>
#ifdef DRM_DEBUG
#undef DRM_DEBUG
#define DRM_DEBUG_DEFAULT_ON 1
#endif /* DRM_DEBUG */
#endif

#if defined(DRM_LINUX) && DRM_LINUX && !defined(__amd64__)
#include <sys/file.h>
#include <sys/proc.h>
#include <machine/../linux/linux.h>
#include <machine/../linux/linux_proto.h>
#else
/* Either it was defined when it shouldn't be (FreeBSD amd64) or it isn't
 * supported on this OS yet.
 */
#undef DRM_LINUX
#define DRM_LINUX 0
#endif

#define DRM_HASH_SIZE	      16 /* Size of key hash table		  */
#define DRM_KERNEL_CONTEXT    0	 /* Change drm_resctx if changed	  */
#define DRM_RESERVED_CONTEXTS 1	 /* Change drm_resctx if changed	  */

#define DRM_MEM_DMA	   0
#define DRM_MEM_SAREA	   1
#define DRM_MEM_DRIVER	   2
#define DRM_MEM_MAGIC	   3
#define DRM_MEM_IOCTLS	   4
#define DRM_MEM_MAPS	   5
#define DRM_MEM_BUFS	   6
#define DRM_MEM_SEGS	   7
#define DRM_MEM_PAGES	   8
#define DRM_MEM_FILES	  9
#define DRM_MEM_QUEUES	  10
#define DRM_MEM_CMDS	  11
#define DRM_MEM_MAPPINGS  12
#define DRM_MEM_BUFLISTS  13
#define DRM_MEM_AGPLISTS  14
#define DRM_MEM_TOTALAGP  15
#define DRM_MEM_BOUNDAGP  16
#define DRM_MEM_CTXBITMAP 17
#define DRM_MEM_STUB	  18
#define DRM_MEM_SGLISTS	  19
#define DRM_MEM_DRAWABLE  20

#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)

				/* Internal types and structures */
#define DRM_ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
#define DRM_MIN(a,b) ((a)<(b)?(a):(b))
#define DRM_MAX(a,b) ((a)>(b)?(a):(b))

#define DRM_IF_VERSION(maj, min) (maj << 16 | min)

MALLOC_DECLARE(M_DRM);

#define __OS_HAS_AGP	1

#define DRM_DEV_MODE	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
#define DRM_DEV_UID	0
#define DRM_DEV_GID	0

#define wait_queue_head_t	atomic_t
#define DRM_WAKEUP(w)		wakeup((void *)w)
#define DRM_WAKEUP_INT(w)	wakeup(w)
#define DRM_INIT_WAITQUEUE(queue) do {(void)(queue);} while (0)

#if defined(__FreeBSD__) && __FreeBSD_version < 502109
#define bus_alloc_resource_any(dev, type, rid, flags) \
	bus_alloc_resource(dev, type, rid, 0ul, ~0ul, 1, flags)
#endif

#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
#define DRM_CURPROC		curthread
#define DRM_STRUCTPROC		struct thread
#define DRM_SPINTYPE		struct mtx
#define DRM_SPININIT(l,name)	mtx_init(l, name, NULL, MTX_DEF)
#define DRM_SPINUNINIT(l)	mtx_destroy(l)
#define DRM_SPINLOCK(l)		mtx_lock(l)
#define DRM_SPINUNLOCK(u)	mtx_unlock(u)
#define DRM_SPINLOCK_IRQSAVE(l, irqflags) do {		\
	mtx_lock(l);					\
	(void)irqflags;					\
} while (0)
#define DRM_SPINUNLOCK_IRQRESTORE(u, irqflags) mtx_unlock(u)
#define DRM_SPINLOCK_ASSERT(l)	mtx_assert(l, MA_OWNED)
#define DRM_CURRENTPID		curthread->td_proc->p_pid
#define DRM_LOCK()		mtx_lock(&dev->dev_lock)
#define DRM_UNLOCK() 		mtx_unlock(&dev->dev_lock)
#define DRM_SYSCTL_HANDLER_ARGS	(SYSCTL_HANDLER_ARGS)
#else /* __FreeBSD__ && __FreeBSD_version >= 500000 */
#define DRM_CURPROC		curproc
#define DRM_STRUCTPROC		struct proc
#define DRM_SPINTYPE		struct simplelock
#define DRM_SPININIT(l,name)
#define DRM_SPINUNINIT(l)
#define DRM_SPINLOCK(l)	
#define DRM_SPINUNLOCK(u)
#define DRM_SPINLOCK_ASSERT(l)
#define DRM_CURRENTPID		curproc->p_pid
#define DRM_LOCK()
#define DRM_UNLOCK()
#define DRM_SYSCTL_HANDLER_ARGS	SYSCTL_HANDLER_ARGS
#define spldrm()		spltty()
#endif /* __NetBSD__ || __OpenBSD__ */

#define DRM_IRQ_ARGS		void *arg
typedef void			irqreturn_t;
#define IRQ_HANDLED		/* nothing */
#define IRQ_NONE		/* nothing */

enum {
	DRM_IS_NOT_AGP,
	DRM_IS_AGP,
	DRM_MIGHT_BE_AGP
};
#define DRM_AGP_MEM		struct agp_memory_info

#if defined(__FreeBSD__)
#define drm_get_device_from_kdev(_kdev) (_kdev->si_drv1)
#elif defined(__NetBSD__)
#define drm_get_device_from_kdev(_kdev) device_lookup(&drm_cd, minor(_kdev))
#elif defined(__OpenBSD__)
#define drm_get_device_from_kdev(_kdev) device_lookup(&drm_cd, \
    minor(_kdev)))->dv_cfdata->cf_driver->cd_devs[minor(_kdev)]
#endif

#if defined(__FreeBSD__)
#define PAGE_ALIGN(addr) round_page(addr)
/* DRM_SUSER returns true if the user is superuser */
#if __FreeBSD_version >= 700000
#define DRM_SUSER(p)		(priv_check(p, PRIV_DRIVER) == 0)
#else
#define DRM_SUSER(p)		(suser(p) == 0)
#endif
#define DRM_AGP_FIND_DEVICE()	agp_find_device()
#define DRM_MTRR_WC		MDF_WRITECOMBINE
#define jiffies			ticks

#else /* __FreeBSD__ */

#define CDEV_MAJOR		34
#define PAGE_ALIGN(addr)	(((addr) + PAGE_SIZE - 1) & PAGE_MASK)
/* DRM_SUSER returns true if the user is superuser */
#define DRM_SUSER(p)		(suser(p->p_ucred, &p->p_acflag) == 0)
#define DRM_AGP_FIND_DEVICE()	agp_find_device(0)
#define DRM_MTRR_WC		MTRR_TYPE_WC
#define jiffies			hardclock_ticks

typedef drm_device_t *device_t;
extern struct cfdriver drm_cd;
#endif /* !__FreeBSD__ */

/* Capabilities taken from src/sys/dev/pci/pcireg.h. */
#ifndef PCIY_AGP
#define PCIY_AGP	0x02
#endif

#ifndef PCIY_EXPRESS
#define PCIY_EXPRESS	0x10
#endif

typedef unsigned long dma_addr_t;
typedef u_int64_t u64;
typedef u_int32_t u32;
typedef u_int16_t u16;
typedef u_int8_t u8;

/* DRM_READMEMORYBARRIER() prevents reordering of reads.
 * DRM_WRITEMEMORYBARRIER() prevents reordering of writes.
 * DRM_MEMORYBARRIER() prevents reordering of reads and writes.
 */
#if defined(__i386__)
#define DRM_READMEMORYBARRIER()		__asm __volatile( \
					"lock; addl $0,0(%%esp)" : : : "memory");
#define DRM_WRITEMEMORYBARRIER()	__asm __volatile("" : : : "memory");
#define DRM_MEMORYBARRIER()		__asm __volatile( \
					"lock; addl $0,0(%%esp)" : : : "memory");
#elif defined(__alpha__)
#define DRM_READMEMORYBARRIER()		alpha_mb();
#define DRM_WRITEMEMORYBARRIER()	alpha_wmb();
#define DRM_MEMORYBARRIER()		alpha_mb();
#elif defined(__amd64__)
#define DRM_READMEMORYBARRIER()		__asm __volatile( \
					"lock; addl $0,0(%%rsp)" : : : "memory");
#define DRM_WRITEMEMORYBARRIER()	__asm __volatile("" : : : "memory");
#define DRM_MEMORYBARRIER()		__asm __volatile( \
					"lock; addl $0,0(%%rsp)" : : : "memory");
#endif

#ifdef __FreeBSD__
#define DRM_READ8(map, offset)						\
	*(volatile u_int8_t *) (((unsigned long)(map)->handle) + (offset))
#define DRM_READ16(map, offset)						\
	*(volatile u_int16_t *) (((unsigned long)(map)->handle) + (offset))
#define DRM_READ32(map, offset)						\
	*(volatile u_int32_t *)(((unsigned long)(map)->handle) + (offset))
#define DRM_WRITE8(map, offset, val)					\
	*(volatile u_int8_t *) (((unsigned long)(map)->handle) + (offset)) = val
#define DRM_WRITE16(map, offset, val)					\
	*(volatile u_int16_t *) (((unsigned long)(map)->handle) + (offset)) = val
#define DRM_WRITE32(map, offset, val)					\
	*(volatile u_int32_t *)(((unsigned long)(map)->handle) + (offset)) = val

#define DRM_VERIFYAREA_READ( uaddr, size )		\
	(!useracc(__DECONST(caddr_t, uaddr), size, VM_PROT_READ))

#else /* __FreeBSD__ */

typedef vaddr_t vm_offset_t;

#define DRM_READ8(map, offset)		\
	bus_space_read_1( (map)->bst, (map)->bsh, (offset))
#define DRM_READ16(map, offset)		\
	bus_space_read_2( (map)->bst, (map)->bsh, (offset))
#define DRM_READ32(map, offset)		\
	bus_space_read_4( (map)->bst, (map)->bsh, (offset))
#define DRM_WRITE8(map, offset, val)	\
	bus_space_write_1((map)->bst, (map)->bsh, (offset), (val))
#define DRM_WRITE16(map, offset, val)	\
	bus_space_write_2((map)->bst, (map)->bsh, (offset), (val))
#define DRM_WRITE32(map, offset, val)	\
	bus_space_write_4((map)->bst, (map)->bsh, (offset), (val))

#define DRM_VERIFYAREA_READ( uaddr, size )		\
	(!uvm_useracc((caddr_t)uaddr, size, VM_PROT_READ))
#endif /* !__FreeBSD__ */

#define DRM_COPY_TO_USER(user, kern, size) \
	copyout(kern, user, size)
#define DRM_COPY_FROM_USER(kern, user, size) \
	copyin(user, kern, size)
#define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3) 	\
	copyin(arg2, arg1, arg3)
#define DRM_COPY_TO_USER_UNCHECKED(arg1, arg2, arg3)	\
	copyout(arg2, arg1, arg3)
#if __FreeBSD_version > 500000
#define DRM_GET_USER_UNCHECKED(val, uaddr)		\
	((val) = fuword32(uaddr), 0)
#else
#define DRM_GET_USER_UNCHECKED(val, uaddr)		\
	((val) = fuword(uaddr), 0)
#endif

#define cpu_to_le32(x) htole32(x)
#define le32_to_cpu(x) le32toh(x)

#define DRM_HZ			hz
#define DRM_UDELAY(udelay)	DELAY(udelay)
#define DRM_TIME_SLICE		(hz/20)  /* Time slice for GLXContexts	  */

#define DRM_GET_PRIV_SAREA(_dev, _ctx, _map) do {	\
	(_map) = (_dev)->context_sareas[_ctx];		\
} while(0)

#define LOCK_TEST_WITH_RETURN(dev, file_priv)				\
do {									\
	if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) ||		\
	     dev->lock.file_priv != file_priv) {			\
		DRM_ERROR("%s called without lock held\n",		\
			   __FUNCTION__);				\
		return EINVAL;						\
	}								\
} while (0)

#if defined(__FreeBSD__) && __FreeBSD_version > 500000
/* Returns -errno to shared code */
#define DRM_WAIT_ON( ret, queue, timeout, condition )		\
for ( ret = 0 ; !ret && !(condition) ; ) {			\
	DRM_UNLOCK();						\
	mtx_lock(&dev->irq_lock);				\
	if (!(condition))					\
	   ret = -mtx_sleep(&(queue), &dev->irq_lock, 		\
			 PZERO | PCATCH, "drmwtq", (timeout));	\
	mtx_unlock(&dev->irq_lock);				\
	DRM_LOCK();						\
}
#else
/* Returns -errno to shared code */
#define DRM_WAIT_ON( ret, queue, timeout, condition )	\
for ( ret = 0 ; !ret && !(condition) ; ) {		\
        int s = spldrm();				\
	if (!(condition))				\
	   ret = -tsleep( &(queue), PZERO | PCATCH, 	\
			 "drmwtq", (timeout) );		\
	splx(s);					\
}
#endif

#define DRM_ERROR(fmt, arg...) \
	printf("error: [" DRM_NAME ":pid%d:%s] *ERROR* " fmt,		\
	    DRM_CURRENTPID, __func__ , ## arg)

#define DRM_INFO(fmt, arg...)  printf("info: [" DRM_NAME "] " fmt , ## arg)

#define DRM_DEBUG(fmt, arg...) do {					\
	if (drm_debug_flag)						\
		printf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID,	\
			__func__ , ## arg);				\
} while (0)

typedef struct drm_pci_id_list
{
	int vendor;
	int device;
	long driver_private;
	char *name;
} drm_pci_id_list_t;

#define DRM_AUTH	0x1
#define DRM_MASTER	0x2
#define DRM_ROOT_ONLY	0x4
typedef struct drm_ioctl_desc {
	unsigned long cmd;
	int (*func)(drm_device_t *dev, void *data, struct drm_file *file_priv);
	int flags;
} drm_ioctl_desc_t;
/**
 * Creates a driver or general drm_ioctl_desc array entry for the given
 * ioctl, for use by drm_ioctl().
 */
#define DRM_IOCTL_DEF(ioctl, func, flags) \
	[DRM_IOCTL_NR(ioctl)] = {ioctl, func, flags}

typedef struct drm_magic_entry {