drivers/char/drm/tdfx_drv.c

   1 /* tdfx.c -- tdfx driver -*- linux-c -*-
   2  * Created: Thu Oct  7 10:38:32 1999 by faith@precisioninsight.com
   3  *
   4  * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  22  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  23  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *    Rickard E. (Rik) Faith <faith@precisioninsight.com>
  28  *    Daryll Strauss <daryll@precisioninsight.com>
  29  *
  30  */
  31
  32 #include "drmP.h"
  33 #include "tdfx_drv.h"
  34
  35 #define TDFX_NAME        "tdfx"
  36 #define TDFX_DESC        "tdfx"
  37 #define TDFX_DATE        "19991009"
  38 #define TDFX_MAJOR       0
  39 #define TDFX_MINOR       0
  40 #define TDFX_PATCHLEVEL  1
  41
  42 static drm_device_t           tdfx_device;
  43 drm_ctx_t                     tdfx_res_ctx;
  44
  45 static struct file_operations tdfx_fops = {
  46         open:    tdfx_open,
  47         flush:   drm_flush,
  48         release: tdfx_release,
  49         ioctl:   tdfx_ioctl,
  50         mmap:    drm_mmap,
  51         read:    drm_read,
  52         fasync:  drm_fasync,
  53         poll:    drm_poll,
  54 };
  55
  56 static struct miscdevice      tdfx_misc = {
  57         minor: MISC_DYNAMIC_MINOR,
  58         name:  TDFX_NAME,
  59         fops:  &tdfx_fops,
  60 };
  61
  62 static drm_ioctl_desc_t       tdfx_ioctls[] = {
  63         [DRM_IOCTL_NR(DRM_IOCTL_VERSION)]    = { tdfx_version,    0, 0 },
  64         [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique,   0, 0 },
  65         [DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)]  = { drm_getmagic,    0, 0 },
  66         [DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)]  = { drm_irq_busid,   0, 1 },
  67
  68         [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique,   1, 1 },
  69         [DRM_IOCTL_NR(DRM_IOCTL_BLOCK)]      = { drm_block,       1, 1 },
  70         [DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]    = { drm_unblock,     1, 1 },
  71         [DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic,   1, 1 },
  72         [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)]    = { drm_addmap,      1, 1 },
  73
  74         [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)]    = { tdfx_addctx,     1, 1 },
  75         [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)]     = { tdfx_rmctx,      1, 1 },
  76         [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)]    = { tdfx_modctx,     1, 1 },
  77         [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)]    = { tdfx_getctx,     1, 0 },
  78         [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { tdfx_switchctx,  1, 1 },
  79         [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)]    = { tdfx_newctx,     1, 1 },
  80         [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)]    = { tdfx_resctx,     1, 0 },
  81         [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)]   = { drm_adddraw,     1, 1 },
  82         [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)]    = { drm_rmdraw,      1, 1 },
  83         [DRM_IOCTL_NR(DRM_IOCTL_LOCK)]       = { tdfx_lock,       1, 0 },
  84         [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)]     = { tdfx_unlock,     1, 0 },
  85         [DRM_IOCTL_NR(DRM_IOCTL_FINISH)]     = { drm_finish,      1, 0 },
  86 };
  87 #define TDFX_IOCTL_COUNT DRM_ARRAY_SIZE(tdfx_ioctls)
  88
  89 #ifdef MODULE
  90 static char                   *tdfx = NULL;
  91 #endif
  92
  93 MODULE_AUTHOR("Precision Insight, Inc., Cedar Park, Texas.");
  94 MODULE_DESCRIPTION("tdfx");
  95 MODULE_PARM(tdfx, "s");
  96
  97 static int tdfx_setup(drm_device_t *dev)
  98 {
  99         int i;
 100
 101         atomic_set(&dev->ioctl_count, 0);
 102         atomic_set(&dev->vma_count, 0);
 103         dev->buf_use      = 0;
 104         atomic_set(&dev->buf_alloc, 0);
 105
 106         atomic_set(&dev->total_open, 0);
 107         atomic_set(&dev->total_close, 0);
 108         atomic_set(&dev->total_ioctl, 0);
 109         atomic_set(&dev->total_irq, 0);
 110         atomic_set(&dev->total_ctx, 0);
 111         atomic_set(&dev->total_locks, 0);
 112         atomic_set(&dev->total_unlocks, 0);
 113         atomic_set(&dev->total_contends, 0);
 114         atomic_set(&dev->total_sleeps, 0);
 115
 116         for (i = 0; i < DRM_HASH_SIZE; i++) {
 117                 dev->magiclist[i].head = NULL;
 118                 dev->magiclist[i].tail = NULL;
 119         }
 120         dev->maplist        = NULL;
 121         dev->map_count      = 0;
 122         dev->vmalist        = NULL;
 123         dev->lock.hw_lock   = NULL;
 124         init_waitqueue_head(&dev->lock.lock_queue);
 125         dev->queue_count    = 0;
 126         dev->queue_reserved = 0;
 127         dev->queue_slots    = 0;
 128         dev->queuelist      = NULL;
 129         dev->irq            = 0;
 130         dev->context_flag   = 0;
 131         dev->interrupt_flag = 0;
 132         dev->dma            = 0;
 133         dev->dma_flag       = 0;
 134         dev->last_context   = 0;
 135         dev->last_switch    = 0;
 136         dev->last_checked   = 0;
 137         init_timer(&dev->timer);
 138         init_waitqueue_head(&dev->context_wait);
 139
 140         dev->ctx_start      = 0;
 141         dev->lck_start      = 0;
 142
 143         dev->buf_rp       = dev->buf;
 144         dev->buf_wp       = dev->buf;
 145         dev->buf_end      = dev->buf + DRM_BSZ;
 146         dev->buf_async    = NULL;
 147         init_waitqueue_head(&dev->buf_readers);
 148         init_waitqueue_head(&dev->buf_writers);
 149
 150         tdfx_res_ctx.handle=-1;
 151
 152         DRM_DEBUG("\n");
 153
 154         /* The kernel's context could be created here, but is now created
 155            in drm_dma_enqueue.  This is more resource-efficient for
 156            hardware that does not do DMA, but may mean that
 157            drm_select_queue fails between the time the interrupt is
 158            initialized and the time the queues are initialized. */
 159
 160         return 0;
 161 }
 162
 163
 164 static int tdfx_takedown(drm_device_t *dev)
 165 {
 166         int               i;
 167         drm_magic_entry_t *pt, *next;
 168         drm_map_t         *map;
 169         drm_vma_entry_t   *vma, *vma_next;
 170
 171         DRM_DEBUG("\n");
 172
 173         down(&dev->struct_sem);
 174         del_timer(&dev->timer);
 175
 176         if (dev->devname) {
 177                 drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 178                 dev->devname = NULL;
 179         }
 180
 181         if (dev->unique) {
 182                 drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 183                 dev->unique = NULL;
 184                 dev->unique_len = 0;
 185         }
 186                                 /* Clear pid list */
 187         for (i = 0; i < DRM_HASH_SIZE; i++) {
 188                 for (pt = dev->magiclist[i].head; pt; pt = next) {
 189                         next = pt->next;
 190                         drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
 191                 }
 192                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 193         }
 194
 195                                 /* Clear vma list (only built for debugging) */
 196         if (dev->vmalist) {
 197                 for (vma = dev->vmalist; vma; vma = vma_next) {
 198                         vma_next = vma->next;
 199                         drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
 200                 }
 201                 dev->vmalist = NULL;
 202         }
 203
 204                                 /* Clear map area and mtrr information */
 205         if (dev->maplist) {
 206                 for (i = 0; i < dev->map_count; i++) {
 207                         map = dev->maplist[i];
 208                         switch (map->type) {
 209                         case _DRM_REGISTERS:
 210                         case _DRM_FRAME_BUFFER:
 211 #ifdef CONFIG_MTRR
 212                                 if (map->mtrr >= 0) {
 213                                         int retcode;
 214                                         retcode = mtrr_del(map->mtrr,
 215                                                            map->offset,
 216                                                            map->size);
 217                                         DRM_DEBUG("mtrr_del = %d\n", retcode);
 218                                 }
 219 #endif
 220                                 drm_ioremapfree(map->handle, map->size);
 221                                 break;
 222                         case _DRM_SHM:
 223                                 drm_free_pages((unsigned long)map->handle,
 224                                                drm_order(map->size)
 225                                                - PAGE_SHIFT,
 226                                                DRM_MEM_SAREA);
 227                                 break;
 228                         }
 229                         drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 230                 }
 231                 drm_free(dev->maplist,
 232                          dev->map_count * sizeof(*dev->maplist),
 233                          DRM_MEM_MAPS);
 234                 dev->maplist   = NULL;
 235                 dev->map_count = 0;
 236         }
 237
 238         if (dev->lock.hw_lock) {
 239                 dev->lock.hw_lock    = NULL; /* SHM removed */
 240                 dev->lock.pid        = 0;
 241                 wake_up_interruptible(&dev->lock.lock_queue);
 242         }
 243         up(&dev->struct_sem);
 244
 245         return 0;
 246 }
 247
 248 /* tdfx_init is called via init_module at module load time, or via
 249  * linux/init/main.c (this is not currently supported). */
 250
 251 int tdfx_init(void)
 252 {
 253         int                   retcode;
 254         drm_device_t          *dev = &tdfx_device;
 255
 256         DRM_DEBUG("\n");
 257
 258         memset((void *)dev, 0, sizeof(*dev));
 259         dev->count_lock   = SPIN_LOCK_UNLOCKED;
 260         sema_init(&dev->struct_sem, 1);
 261
 262 #ifdef MODULE
 263         drm_parse_options(tdfx);
 264 #endif
 265
 266         if ((retcode = misc_register(&tdfx_misc))) {
 267                 DRM_ERROR("Cannot register \"%s\"\n", TDFX_NAME);
 268                 return retcode;
 269         }
 270         dev->device = MKDEV(MISC_MAJOR, tdfx_misc.minor);
 271         dev->name   = TDFX_NAME;
 272
 273         drm_mem_init();
 274         drm_proc_init(dev);
 275
 276         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
 277                  TDFX_NAME,
 278                  TDFX_MAJOR,
 279                  TDFX_MINOR,
 280                  TDFX_PATCHLEVEL,
 281                  TDFX_DATE,
 282                  tdfx_misc.minor);
 283
 284         return 0;
 285 }
 286
 287 /* tdfx_cleanup is called via cleanup_module at module unload time. */
 288
 289 void tdfx_cleanup(void)
 290 {
 291         drm_device_t          *dev = &tdfx_device;
 292
 293         DRM_DEBUG("\n");
 294
 295         drm_proc_cleanup();
 296         if (misc_deregister(&tdfx_misc)) {
 297                 DRM_ERROR("Cannot unload module\n");
 298         } else {
 299                 DRM_INFO("Module unloaded\n");
 300         }
 301         tdfx_takedown(dev);
 302 }
 303
 304 int tdfx_version(struct inode *inode, struct file *filp, unsigned int cmd,
 305                   unsigned long arg)
 306 {
 307         drm_version_t version;
 308         int           len;
 309
 310         copy_from_user_ret(&version,
 311                            (drm_version_t *)arg,
 312                            sizeof(version),
 313                            -EFAULT);
 314
 315 #define DRM_COPY(name,value)                                 \
 316         len = strlen(value);                                 \
 317         if (len > name##_len) len = name##_len;              \
 318         name##_len = strlen(value);                          \
 319         if (len && name) {                                   \
 320                 copy_to_user_ret(name, value, len, -EFAULT); \
 321         }
 322
 323         version.version_major      = TDFX_MAJOR;
 324         version.version_minor      = TDFX_MINOR;
 325         version.version_patchlevel = TDFX_PATCHLEVEL;
 326
 327         DRM_COPY(version.name, TDFX_NAME);
 328         DRM_COPY(version.date, TDFX_DATE);
 329         DRM_COPY(version.desc, TDFX_DESC);
 330
 331         copy_to_user_ret((drm_version_t *)arg,
 332                          &version,
 333                          sizeof(version),
 334                          -EFAULT);
 335         return 0;
 336 }
 337
 338 int tdfx_open(struct inode *inode, struct file *filp)
 339 {
 340         drm_device_t  *dev    = &tdfx_device;
 341         int           retcode = 0;
 342
 343         DRM_DEBUG("open_count = %d\n", dev->open_count);
 344         if (!(retcode = drm_open_helper(inode, filp, dev))) {
 345                 MOD_INC_USE_COUNT;
 346                 atomic_inc(&dev->total_open);
 347                 spin_lock(&dev->count_lock);
 348                 if (!dev->open_count++) {
 349                         spin_unlock(&dev->count_lock);
 350                         return tdfx_setup(dev);
 351                 }
 352                 spin_unlock(&dev->count_lock);
 353         }
 354         return retcode;
 355 }
 356
 357 int tdfx_release(struct inode *inode, struct file *filp)
 358 {
 359         drm_file_t    *priv   = filp->private_data;
 360         drm_device_t  *dev    = priv->dev;
 361         int           retcode = 0;
 362
 363         DRM_DEBUG("open_count = %d\n", dev->open_count);
 364         if (!(retcode = drm_release(inode, filp))) {
 365                 MOD_DEC_USE_COUNT;
 366                 atomic_inc(&dev->total_close);
 367                 spin_lock(&dev->count_lock);
 368                 if (!--dev->open_count) {
 369                         if (atomic_read(&dev->ioctl_count) || dev->blocked) {
 370                                 DRM_ERROR("Device busy: %d %d\n",
 371                                           atomic_read(&dev->ioctl_count),
 372                                           dev->blocked);
 373                                 spin_unlock(&dev->count_lock);
 374                                 return -EBUSY;
 375                         }
 376                         spin_unlock(&dev->count_lock);
 377                         return tdfx_takedown(dev);
 378                 }
 379                 spin_unlock(&dev->count_lock);
 380         }
 381         return retcode;
 382 }
 383
 384 /* tdfx_ioctl is called whenever a process performs an ioctl on /dev/drm. */
 385
 386 int tdfx_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 387                 unsigned long arg)
 388 {
 389         int              nr      = DRM_IOCTL_NR(cmd);
 390         drm_file_t       *priv   = filp->private_data;
 391         drm_device_t     *dev    = priv->dev;
 392         int              retcode = 0;
 393         drm_ioctl_desc_t *ioctl;
 394         drm_ioctl_t      *func;
 395
 396         atomic_inc(&dev->ioctl_count);
 397         atomic_inc(&dev->total_ioctl);
 398         ++priv->ioctl_count;
 399
 400         DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 401                   current->pid, cmd, nr, dev->device, priv->authenticated);
 402
 403         if (nr >= TDFX_IOCTL_COUNT) {
 404                 retcode = -EINVAL;
 405         } else {
 406                 ioctl     = &tdfx_ioctls[nr];
 407                 func      = ioctl->func;
 408
 409                 if (!func) {
 410                         DRM_DEBUG("no function\n");
 411                         retcode = -EINVAL;
 412                 } else if ((ioctl->root_only && !capable(CAP_SYS_ADMIN))
 413                             || (ioctl->auth_needed && !priv->authenticated)) {
 414                         retcode = -EACCES;
 415                 } else {
 416                         retcode = (func)(inode, filp, cmd, arg);
 417                 }
 418         }
 419
 420         atomic_dec(&dev->ioctl_count);
 421         return retcode;
 422 }
 423
 424 int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 425               unsigned long arg)
 426 {
 427         drm_file_t        *priv   = filp->private_data;
 428         drm_device_t      *dev    = priv->dev;
 429         DECLARE_WAITQUEUE(entry, current);
 430         int               ret   = 0;
 431         drm_lock_t        lock;
 432 #if DRM_DMA_HISTOGRAM
 433         cycles_t          start;
 434
 435         dev->lck_start = start = get_cycles();
 436 #endif
 437
 438         copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
 439
 440         if (lock.context == DRM_KERNEL_CONTEXT) {
 441                 DRM_ERROR("Process %d using kernel context %d\n",
 442                           current->pid, lock.context);
 443                 return -EINVAL;
 444         }
 445
 446         DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
 447                   lock.context, current->pid, dev->lock.hw_lock->lock,
 448                   lock.flags);
 449
 450 #if 0
 451                                 /* dev->queue_count == 0 right now for
 452                                    tdfx.  FIXME? */
 453         if (lock.context < 0 || lock.context >= dev->queue_count)
 454                 return -EINVAL;
 455 #endif
 456
 457         if (!ret) {
 458 #if 0
 459                 if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
 460                     != lock.context) {
 461                         long j = jiffies - dev->lock.lock_time;
 462
 463                         if (lock.context == tdfx_res_ctx.handle &&
 464                                 j >= 0 && j < DRM_LOCK_SLICE) {
 465                                 /* Can't take lock if we just had it and
 466                                    there is contention. */
 467                                 DRM_DEBUG("%d (pid %d) delayed j=%d dev=%d jiffies=%d\n",
 468                                         lock.context, current->pid, j,
 469                                         dev->lock.lock_time, jiffies);
 470                                 current->state = TASK_INTERRUPTIBLE;
 471                                 current->policy |= SCHED_YIELD;
 472                                 schedule_timeout(DRM_LOCK_SLICE-j);
 473                                 DRM_DEBUG("jiffies=%d\n", jiffies);
 474                         }
 475                 }
 476 #endif
 477                 add_wait_queue(&dev->lock.lock_queue, &entry);
 478                 for (;;) {
 479                         if (!dev->lock.hw_lock) {
 480                                 /* Device has been unregistered */
 481                                 ret = -EINTR;
 482                                 break;
 483                         }
 484                         if (drm_lock_take(&dev->lock.hw_lock->lock,
 485                                           lock.context)) {
 486                                 dev->lock.pid       = current->pid;
 487                                 dev->lock.lock_time = jiffies;
 488                                 atomic_inc(&dev->total_locks);
 489                                 break;  /* Got lock */
 490                         }
 491
 492                                 /* Contention */
 493                         atomic_inc(&dev->total_sleeps);
 494                         current->state = TASK_INTERRUPTIBLE;
 495                         current->policy |= SCHED_YIELD;
 496                         schedule();
 497                         if (signal_pending(current)) {
 498                                 ret = -ERESTARTSYS;
 499                                 break;
 500                         }
 501                 }
 502                 current->state = TASK_RUNNING;
 503                 remove_wait_queue(&dev->lock.lock_queue, &entry);
 504         }
 505
 506 #if 0
 507         if (!ret && dev->last_context != lock.context &&
 508                 lock.context != tdfx_res_ctx.handle &&
 509                 dev->last_context != tdfx_res_ctx.handle) {
 510                 add_wait_queue(&dev->context_wait, &entry);
 511                 current->state = TASK_INTERRUPTIBLE;
 512                 /* PRE: dev->last_context != lock.context */
 513                 tdfx_context_switch(dev, dev->last_context, lock.context);
 514                 /* POST: we will wait for the context
 515                    switch and will dispatch on a later call
 516                    when dev->last_context == lock.context
 517                    NOTE WE HOLD THE LOCK THROUGHOUT THIS
 518                    TIME! */
 519                 current->policy |= SCHED_YIELD;
 520                 schedule();
 521                 current->state = TASK_RUNNING;
 522                 remove_wait_queue(&dev->context_wait, &entry);
 523                 if (signal_pending(current)) {
 524                         ret = -EINTR;
 525                 } else if (dev->last_context != lock.context) {
 526                         DRM_ERROR("Context mismatch: %d %d\n",
 527                                 dev->last_context, lock.context);
 528                 }
 529         }
 530 #endif
 531
 532         if (!ret) {
 533                 if (lock.flags & _DRM_LOCK_READY) {
 534                                 /* Wait for space in DMA/FIFO */
 535                 }
 536                 if (lock.flags & _DRM_LOCK_QUIESCENT) {
 537                                 /* Make hardware quiescent */
 538 #if 0
 539                         tdfx_quiescent(dev);
 540 #endif
 541                 }
 542         }
 543
 544         if (lock.context != tdfx_res_ctx.handle) {
 545                 current->counter = 5;
 546                 current->priority = DEF_PRIORITY/4;
 547         }
 548
 549         DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock");
 550
 551 #if DRM_DMA_HISTOGRAM
 552         atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
 553 #endif
 554
 555         return ret;
 556 }
 557
 558
 559 int tdfx_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 560                  unsigned long arg)
 561 {
 562         drm_file_t        *priv   = filp->private_data;
 563         drm_device_t      *dev    = priv->dev;
 564         drm_lock_t        lock;
 565
 566         copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
 567
 568         if (lock.context == DRM_KERNEL_CONTEXT) {
 569                 DRM_ERROR("Process %d using kernel context %d\n",
 570                           current->pid, lock.context);
 571                 return -EINVAL;
 572         }
 573
 574         DRM_DEBUG("%d frees lock (%d holds)\n",
 575                   lock.context,
 576                   _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 577         atomic_inc(&dev->total_unlocks);
 578         if (_DRM_LOCK_IS_CONT(dev->lock.hw_lock->lock))
 579                 atomic_inc(&dev->total_contends);
 580         drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
 581                                 /* FIXME: Try to send data to card here */
 582         if (!dev->context_flag) {
 583                 if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
 584                                   DRM_KERNEL_CONTEXT)) {
 585                         DRM_ERROR("\n");
 586                 }
 587         }
 588
 589         if (lock.context != tdfx_res_ctx.handle) {
 590                 current->counter = 5;
 591                 current->priority = DEF_PRIORITY;
 592         }
 593
 594         return 0;
 595 }
 596
 597 module_init(tdfx_init);
 598 module_exit(tdfx_cleanup);
 599
 600 #ifndef MODULE
 601 /*
 602  * tdfx_setup is called by the kernel to parse command-line options passed
 603  * via the boot-loader (e.g., LILO).  It calls the insmod option routine,
 604  * drm_parse_options.
 605  */
 606 static int __init tdfx_options(char *str)
 607 {
 608         drm_parse_options(str);
 609         return 1;
 610 }
 611
 612 __setup("tdfx=", tdfx_options);
 613 #endif