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  * Revised: Tue Oct 12 08:51:35 1999 by faith@precisioninsight.com
   4  *
   5  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25  * DEALINGS IN THE SOFTWARE.
  26  *
  27  * $PI$
  28  * $XFree86$
  29  *
  30  */
  31
  32 #include <linux/config.h>
  33 #include "drmP.h"
  34 #include "tdfx_drv.h"
  35 EXPORT_SYMBOL(tdfx_init);
  36 EXPORT_SYMBOL(tdfx_cleanup);
  37
  38 #define TDFX_NAME        "tdfx"
  39 #define TDFX_DESC        "tdfx"
  40 #define TDFX_DATE        "19991009"
  41 #define TDFX_MAJOR       0
  42 #define TDFX_MINOR       0
  43 #define TDFX_PATCHLEVEL  1
  44
  45 static drm_device_t           tdfx_device;
  46 drm_ctx_t                     tdfx_res_ctx;
  47
  48 static struct file_operations tdfx_fops = {
  49         open:    tdfx_open,
  50         flush:   drm_flush,
  51         release: tdfx_release,
  52         ioctl:   tdfx_ioctl,
  53         mmap:    drm_mmap,
  54         read:    drm_read,
  55         fasync:  drm_fasync,
  56 };
  57
  58 static struct miscdevice      tdfx_misc = {
  59         minor: MISC_DYNAMIC_MINOR,
  60         name:  TDFX_NAME,
  61         fops:  &tdfx_fops,
  62 };
  63
  64 static drm_ioctl_desc_t       tdfx_ioctls[] = {
  65         [DRM_IOCTL_NR(DRM_IOCTL_VERSION)]    = { tdfx_version,    0, 0 },
  66         [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique,   0, 0 },
  67         [DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)]  = { drm_getmagic,    0, 0 },
  68         [DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)]  = { drm_irq_busid,   0, 1 },
  69
  70         [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique,   1, 1 },
  71         [DRM_IOCTL_NR(DRM_IOCTL_BLOCK)]      = { drm_block,       1, 1 },
  72         [DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]    = { drm_unblock,     1, 1 },
  73         [DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic,   1, 1 },
  74         [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)]    = { drm_addmap,      1, 1 },
  75
  76         [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)]    = { tdfx_addctx,     1, 1 },
  77         [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)]     = { tdfx_rmctx,      1, 1 },
  78         [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)]    = { tdfx_modctx,     1, 1 },
  79         [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)]    = { tdfx_getctx,     1, 0 },
  80         [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { tdfx_switchctx,  1, 1 },
  81         [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)]    = { tdfx_newctx,     1, 1 },
  82         [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)]    = { tdfx_resctx,     1, 0 },
  83         [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)]   = { drm_adddraw,     1, 1 },
  84         [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)]    = { drm_rmdraw,      1, 1 },
  85         [DRM_IOCTL_NR(DRM_IOCTL_LOCK)]       = { tdfx_lock,       1, 0 },
  86         [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)]     = { tdfx_unlock,     1, 0 },
  87         [DRM_IOCTL_NR(DRM_IOCTL_FINISH)]     = { drm_finish,      1, 0 },
  88 };
  89 #define TDFX_IOCTL_COUNT DRM_ARRAY_SIZE(tdfx_ioctls)
  90
  91 #ifdef MODULE
  92 static char                   *tdfx = NULL;
  93 #endif
  94
  95 MODULE_AUTHOR("Precision Insight, Inc., Cedar Park, Texas.");
  96 MODULE_DESCRIPTION("tdfx");
  97 MODULE_PARM(tdfx, "s");
  98
  99 static int tdfx_setup(drm_device_t *dev)
 100 {
 101         int i;
 102
 103         atomic_set(&dev->ioctl_count, 0);
 104         atomic_set(&dev->vma_count, 0);
 105         dev->buf_use      = 0;
 106         atomic_set(&dev->buf_alloc, 0);
 107
 108         atomic_set(&dev->total_open, 0);
 109         atomic_set(&dev->total_close, 0);
 110         atomic_set(&dev->total_ioctl, 0);
 111         atomic_set(&dev->total_irq, 0);
 112         atomic_set(&dev->total_ctx, 0);
 113         atomic_set(&dev->total_locks, 0);
 114         atomic_set(&dev->total_unlocks, 0);
 115         atomic_set(&dev->total_contends, 0);
 116         atomic_set(&dev->total_sleeps, 0);
 117
 118         for (i = 0; i < DRM_HASH_SIZE; i++) {
 119                 dev->magiclist[i].head = NULL;
 120                 dev->magiclist[i].tail = NULL;
 121         }
 122         dev->maplist        = NULL;
 123         dev->map_count      = 0;
 124         dev->vmalist        = NULL;
 125         dev->lock.hw_lock   = NULL;
 126         init_waitqueue_head(&dev->lock.lock_queue);
 127         dev->queue_count    = 0;
 128         dev->queue_reserved = 0;
 129         dev->queue_slots    = 0;
 130         dev->queuelist      = NULL;
 131         dev->irq            = 0;
 132         dev->context_flag   = 0;
 133         dev->interrupt_flag = 0;
 134         dev->dma            = 0;
 135         dev->dma_flag       = 0;
 136         dev->last_context   = 0;
 137         dev->last_switch    = 0;
 138         dev->last_checked   = 0;
 139         init_timer(&dev->timer);
 140         init_waitqueue_head(&dev->context_wait);
 141
 142         dev->ctx_start      = 0;
 143         dev->lck_start      = 0;
 144
 145         dev->buf_rp       = dev->buf;
 146         dev->buf_wp       = dev->buf;
 147         dev->buf_end      = dev->buf + DRM_BSZ;
 148         dev->buf_async    = NULL;
 149         init_waitqueue_head(&dev->buf_readers);
 150         init_waitqueue_head(&dev->buf_writers);
 151
 152         tdfx_res_ctx.handle=-1;
 153
 154         DRM_DEBUG("\n");
 155
 156         /* The kernel's context could be created here, but is now created
 157            in drm_dma_enqueue.  This is more resource-efficient for
 158            hardware that does not do DMA, but may mean that
 159            drm_select_queue fails between the time the interrupt is
 160            initialized and the time the queues are initialized. */
 161
 162         return 0;
 163 }
 164
 165
 166 static int tdfx_takedown(drm_device_t *dev)
 167 {
 168         int               i;
 169         drm_magic_entry_t *pt, *next;
 170         drm_map_t         *map;
 171         drm_vma_entry_t   *vma, *vma_next;
 172
 173         DRM_DEBUG("\n");
 174
 175         down(&dev->struct_sem);
 176         del_timer(&dev->timer);
 177
 178         if (dev->devname) {
 179                 drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 180                 dev->devname = NULL;
 181         }
 182
 183         if (dev->unique) {
 184                 drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 185                 dev->unique = NULL;
 186                 dev->unique_len = 0;
 187         }
 188                                 /* Clear pid list */
 189         for (i = 0; i < DRM_HASH_SIZE; i++) {
 190                 for (pt = dev->magiclist[i].head; pt; pt = next) {
 191                         next = pt->next;
 192                         drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
 193                 }
 194                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 195         }
 196
 197                                 /* Clear vma list (only built for debugging) */
 198         if (dev->vmalist) {
 199                 for (vma = dev->vmalist; vma; vma = vma_next) {
 200                         vma_next = vma->next;
 201                         drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
 202                 }
 203                 dev->vmalist = NULL;
 204         }
 205
 206                                 /* Clear map area and mtrr information */
 207         if (dev->maplist) {
 208                 for (i = 0; i < dev->map_count; i++) {
 209                         map = dev->maplist[i];
 210                         switch (map->type) {
 211                         case _DRM_REGISTERS:
 212                         case _DRM_FRAME_BUFFER:
 213 #ifdef CONFIG_MTRR
 214                                 if (map->mtrr >= 0) {
 215                                         int retcode;
 216                                         retcode = mtrr_del(map->mtrr,
 217                                                            map->offset,
 218                                                            map->size);
 219                                         DRM_DEBUG("mtrr_del = %d\n", retcode);
 220                                 }
 221 #endif
 222                                 drm_ioremapfree(map->handle, map->size);
 223                                 break;
 224                         case _DRM_SHM:
 225                                 drm_free_pages((unsigned long)map->handle,
 226                                                drm_order(map->size)
 227                                                - PAGE_SHIFT,
 228                                                DRM_MEM_SAREA);
 229                                 break;
 230                         }
 231                         drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 232                 }
 233                 drm_free(dev->maplist,
 234                          dev->map_count * sizeof(*dev->maplist),
 235                          DRM_MEM_MAPS);
 236                 dev->maplist   = NULL;
 237                 dev->map_count = 0;
 238         }
 239
 240         if (dev->lock.hw_lock) {
 241                 dev->lock.hw_lock    = NULL; /* SHM removed */
 242                 dev->lock.pid        = 0;
 243                 wake_up_interruptible(&dev->lock.lock_queue);
 244         }
 245         up(&dev->struct_sem);
 246
 247         return 0;
 248 }
 249
 250 /* tdfx_init is called via init_module at module load time, or via
 251  * linux/init/main.c (this is not currently supported). */
 252
 253 int tdfx_init(void)
 254 {
 255         int                   retcode;
 256         drm_device_t          *dev = &tdfx_device;
 257
 258         DRM_DEBUG("\n");
 259
 260         memset((void *)dev, 0, sizeof(*dev));
 261         dev->count_lock   = SPIN_LOCK_UNLOCKED;
 262         sema_init(&dev->struct_sem, 1);
 263
 264 #ifdef MODULE
 265         drm_parse_options(tdfx);
 266 #endif
 267
 268         if ((retcode = misc_register(&tdfx_misc))) {
 269                 DRM_ERROR("Cannot register \"%s\"\n", TDFX_NAME);
 270                 return retcode;
 271         }
 272         dev->device = MKDEV(MISC_MAJOR, tdfx_misc.minor);
 273         dev->name   = TDFX_NAME;
 274
 275         drm_mem_init();
 276         drm_proc_init(dev);
 277
 278         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
 279                  TDFX_NAME,
 280                  TDFX_MAJOR,
 281                  TDFX_MINOR,
 282                  TDFX_PATCHLEVEL,
 283                  TDFX_DATE,
 284                  tdfx_misc.minor);
 285
 286         return 0;
 287 }
 288
 289 /* tdfx_cleanup is called via cleanup_module at module unload time. */
 290
 291 void tdfx_cleanup(void)
 292 {
 293         drm_device_t          *dev = &tdfx_device;
 294
 295         DRM_DEBUG("\n");
 296
 297         drm_proc_cleanup();
 298         if (misc_deregister(&tdfx_misc)) {
 299                 DRM_ERROR("Cannot unload module\n");
 300         } else {
 301                 DRM_INFO("Module unloaded\n");
 302         }
 303         tdfx_takedown(dev);
 304 }
 305
 306 int tdfx_version(struct inode *inode, struct file *filp, unsigned int cmd,
 307                   unsigned long arg)
 308 {
 309         drm_version_t version;
 310         int           len;
 311
 312         copy_from_user_ret(&version,
 313                            (drm_version_t *)arg,
 314                            sizeof(version),
 315                            -EFAULT);
 316
 317 #define DRM_COPY(name,value)                                 \
 318         len = strlen(value);                                 \
 319         if (len > name##_len) len = name##_len;              \
 320         name##_len = strlen(value);                          \
 321         if (len && name) {                                   \
 322                 copy_to_user_ret(name, value, len, -EFAULT); \
 323         }
 324
 325         version.version_major      = TDFX_MAJOR;
 326         version.version_minor      = TDFX_MINOR;
 327         version.version_patchlevel = TDFX_PATCHLEVEL;
 328
 329         DRM_COPY(version.name, TDFX_NAME);
 330         DRM_COPY(version.date, TDFX_DATE);
 331         DRM_COPY(version.desc, TDFX_DESC);
 332
 333         copy_to_user_ret((drm_version_t *)arg,
 334                          &version,
 335                          sizeof(version),
 336                          -EFAULT);
 337         return 0;
 338 }
 339
 340 int tdfx_open(struct inode *inode, struct file *filp)
 341 {
 342         drm_device_t  *dev    = &tdfx_device;
 343         int           retcode = 0;
 344
 345         DRM_DEBUG("open_count = %d\n", dev->open_count);
 346         if (!(retcode = drm_open_helper(inode, filp, dev))) {
 347                 MOD_INC_USE_COUNT;
 348                 atomic_inc(&dev->total_open);
 349                 spin_lock(&dev->count_lock);
 350                 if (!dev->open_count++) {
 351                         spin_unlock(&dev->count_lock);
 352                         return tdfx_setup(dev);
 353                 }
 354                 spin_unlock(&dev->count_lock);
 355         }
 356         return retcode;
 357 }
 358
 359 int tdfx_release(struct inode *inode, struct file *filp)
 360 {
 361         drm_file_t    *priv   = filp->private_data;
 362         drm_device_t  *dev    = priv->dev;
 363         int           retcode = 0;
 364
 365         DRM_DEBUG("open_count = %d\n", dev->open_count);
 366         if (!(retcode = drm_release(inode, filp))) {
 367                 MOD_DEC_USE_COUNT;
 368                 atomic_inc(&dev->total_close);
 369                 spin_lock(&dev->count_lock);
 370                 if (!--dev->open_count) {
 371                         if (atomic_read(&dev->ioctl_count) || dev->blocked) {
 372                                 DRM_ERROR("Device busy: %d %d\n",
 373                                           atomic_read(&dev->ioctl_count),
 374                                           dev->blocked);
 375                                 spin_unlock(&dev->count_lock);
 376                                 return -EBUSY;
 377                         }
 378                         spin_unlock(&dev->count_lock);
 379                         return tdfx_takedown(dev);
 380                 }
 381                 spin_unlock(&dev->count_lock);
 382         }
 383         return retcode;
 384 }
 385
 386 /* tdfx_ioctl is called whenever a process performs an ioctl on /dev/drm. */
 387
 388 int tdfx_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 389                 unsigned long arg)
 390 {
 391         int              nr      = DRM_IOCTL_NR(cmd);
 392         drm_file_t       *priv   = filp->private_data;
 393         drm_device_t     *dev    = priv->dev;
 394         int              retcode = 0;
 395         drm_ioctl_desc_t *ioctl;
 396         drm_ioctl_t      *func;
 397
 398         atomic_inc(&dev->ioctl_count);
 399         atomic_inc(&dev->total_ioctl);
 400         ++priv->ioctl_count;
 401
 402         DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 403                   current->pid, cmd, nr, dev->device, priv->authenticated);
 404
 405         if (nr >= TDFX_IOCTL_COUNT) {
 406                 retcode = -EINVAL;
 407         } else {
 408                 ioctl     = &tdfx_ioctls[nr];
 409                 func      = ioctl->func;
 410
 411                 if (!func) {
 412                         DRM_DEBUG("no function\n");
 413                         retcode = -EINVAL;
 414                 } else if ((ioctl->root_only && !capable(CAP_SYS_ADMIN))
 415                             || (ioctl->auth_needed && !priv->authenticated)) {
 416                         retcode = -EACCES;
 417                 } else {
 418                         retcode = (func)(inode, filp, cmd, arg);
 419                 }
 420         }
 421
 422         atomic_dec(&dev->ioctl_count);
 423         return retcode;
 424 }
 425
 426 int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 427               unsigned long arg)
 428 {
 429         drm_file_t        *priv   = filp->private_data;
 430         drm_device_t      *dev    = priv->dev;
 431         DECLARE_WAITQUEUE(entry, current);
 432         int               ret   = 0;
 433         drm_lock_t        lock;
 434 #if DRM_DMA_HISTOGRAM
 435         cycles_t          start;
 436
 437         dev->lck_start = start = get_cycles();
 438 #endif
 439
 440         copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
 441
 442         if (lock.context == DRM_KERNEL_CONTEXT) {
 443                 DRM_ERROR("Process %d using kernel context %d\n",
 444                           current->pid, lock.context);
 445                 return -EINVAL;
 446         }
 447
 448         DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
 449                   lock.context, current->pid, dev->lock.hw_lock->lock,
 450                   lock.flags);
 451
 452 #if 0
 453                                 /* dev->queue_count == 0 right now for
 454                                    tdfx.  FIXME? */
 455         if (lock.context < 0 || lock.context >= dev->queue_count)
 456                 return -EINVAL;
 457 #endif
 458
 459         if (!ret) {
 460 #if 0
 461                 if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
 462                     != lock.context) {
 463                         long j = jiffies - dev->lock.lock_time;
 464
 465                         if (lock.context == tdfx_res_ctx.handle &&
 466                                 j >= 0 && j < DRM_LOCK_SLICE) {
 467                                 /* Can't take lock if we just had it and
 468                                    there is contention. */
 469                                 DRM_DEBUG("%d (pid %d) delayed j=%d dev=%d jiffies=%d\n",
 470                                         lock.context, current->pid, j,
 471                                         dev->lock.lock_time, jiffies);
 472                                 current->state = TASK_INTERRUPTIBLE;
 473                                 current->policy |= SCHED_YIELD;
 474                                 schedule_timeout(DRM_LOCK_SLICE-j);
 475                                 DRM_DEBUG("jiffies=%d\n", jiffies);
 476                         }
 477                 }
 478 #endif
 479                 add_wait_queue(&dev->lock.lock_queue, &entry);
 480                 for (;;) {
 481                         if (!dev->lock.hw_lock) {
 482                                 /* Device has been unregistered */
 483                                 ret = -EINTR;
 484                                 break;
 485                         }
 486                         if (drm_lock_take(&dev->lock.hw_lock->lock,
 487                                           lock.context)) {
 488                                 dev->lock.pid       = current->pid;
 489                                 dev->lock.lock_time = jiffies;
 490                                 atomic_inc(&dev->total_locks);
 491                                 break;  /* Got lock */
 492                         }
 493
 494                                 /* Contention */
 495                         atomic_inc(&dev->total_sleeps);
 496                         current->state = TASK_INTERRUPTIBLE;
 497                         current->policy |= SCHED_YIELD;
 498                         schedule();
 499                         if (signal_pending(current)) {
 500                                 ret = -ERESTARTSYS;
 501                                 break;
 502                         }
 503                 }
 504                 current->state = TASK_RUNNING;
 505                 remove_wait_queue(&dev->lock.lock_queue, &entry);
 506         }
 507
 508 #if 0
 509         if (!ret && dev->last_context != lock.context &&
 510                 lock.context != tdfx_res_ctx.handle &&
 511                 dev->last_context != tdfx_res_ctx.handle) {
 512                 add_wait_queue(&dev->context_wait, &entry);
 513                 current->state = TASK_INTERRUPTIBLE;
 514                 /* PRE: dev->last_context != lock.context */
 515                 tdfx_context_switch(dev, dev->last_context, lock.context);
 516                 /* POST: we will wait for the context
 517                    switch and will dispatch on a later call
 518                    when dev->last_context == lock.context
 519                    NOTE WE HOLD THE LOCK THROUGHOUT THIS
 520                    TIME! */
 521                 current->policy |= SCHED_YIELD;
 522                 schedule();
 523                 current->state = TASK_RUNNING;
 524                 remove_wait_queue(&dev->context_wait, &entry);
 525                 if (signal_pending(current)) {
 526                         ret = -EINTR;
 527                 } else if (dev->last_context != lock.context) {
 528                         DRM_ERROR("Context mismatch: %d %d\n",
 529                                 dev->last_context, lock.context);
 530                 }
 531         }
 532 #endif
 533
 534         if (!ret) {
 535                 if (lock.flags & _DRM_LOCK_READY) {
 536                                 /* Wait for space in DMA/FIFO */
 537                 }
 538                 if (lock.flags & _DRM_LOCK_QUIESCENT) {
 539                                 /* Make hardware quiescent */
 540 #if 0
 541                         tdfx_quiescent(dev);
 542 #endif
 543                 }
 544         }
 545         DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock");
 546
 547 #if DRM_DMA_HISTOGRAM
 548         atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
 549 #endif
 550
 551         return ret;
 552 }
 553
 554
 555 int tdfx_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 556                  unsigned long arg)
 557 {
 558         drm_file_t        *priv   = filp->private_data;
 559         drm_device_t      *dev    = priv->dev;
 560         drm_lock_t        lock;
 561
 562         copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
 563
 564         if (lock.context == DRM_KERNEL_CONTEXT) {
 565                 DRM_ERROR("Process %d using kernel context %d\n",
 566                           current->pid, lock.context);
 567                 return -EINVAL;
 568         }
 569
 570         DRM_DEBUG("%d frees lock (%d holds)\n",
 571                   lock.context,
 572                   _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 573         atomic_inc(&dev->total_unlocks);
 574         if (_DRM_LOCK_IS_CONT(dev->lock.hw_lock->lock))
 575                 atomic_inc(&dev->total_contends);
 576         drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
 577                                 /* FIXME: Try to send data to card here */
 578         if (!dev->context_flag) {
 579                 if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
 580                                   DRM_KERNEL_CONTEXT)) {
 581                         DRM_ERROR("\n");
 582                 }
 583         }
 584
 585         return 0;
 586 }
 587
 588 module_init(tdfx_init);
 589 module_exit(tdfx_cleanup);
 590
 591 #ifndef MODULE
 592 /*
 593  * tdfx_setup is called by the kernel to parse command-line options passed
 594  * via the boot-loader (e.g., LILO).  It calls the insmod option routine,
 595  * drm_parse_options.
 596  */
 597 static int __init tdfx_options(char *str)
 598 {
 599         drm_parse_options(str);
 600         return 1;
 601 }
 602
 603 __setup("tdfx=", tdfx_options);
 604 #endif