1/* mga_drv.c -- Matrox g200/g400 driver -*- linux-c -*- 2 * Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.com 3 * 4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 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 * Authors: Rickard E. (Rik) Faith <faith@valinux.com> 28 * Jeff Hartmann <jhartmann@valinux.com> 29 * 30 * 31 */ 32 33#include <linux/config.h> 34#include "drmP.h" 35#include "mga_drv.h" 36 37#define MGA_NAME "mga" 38#define MGA_DESC "Matrox G200/G400" 39#define MGA_DATE "20000928" 40#define MGA_MAJOR 2 41#define MGA_MINOR 0 42#define MGA_PATCHLEVEL 1 43 44static drm_device_t mga_device; 45drm_ctx_t mga_res_ctx; 46 47static struct file_operations mga_fops = { 48#if LINUX_VERSION_CODE >= 0x020400 49 /* This started being used during 2.4.0-test */ 50 owner: THIS_MODULE, 51#endif 52 open: mga_open, 53 flush: drm_flush, 54 release: mga_release, 55 ioctl: mga_ioctl, 56 mmap: drm_mmap, 57 read: drm_read, 58 fasync: drm_fasync, 59 poll: drm_poll, 60}; 61 62static struct miscdevice mga_misc = { 63 minor: MISC_DYNAMIC_MINOR, 64 name: MGA_NAME, 65 fops: &mga_fops, 66}; 67 68static drm_ioctl_desc_t mga_ioctls[] = { 69 [DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { mga_version, 0, 0 }, 70 [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique, 0, 0 }, 71 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { drm_getmagic, 0, 0 }, 72 [DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { drm_irq_busid, 0, 1 }, 73 74 [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique, 1, 1 }, 75 [DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { drm_block, 1, 1 }, 76 [DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { drm_unblock, 1, 1 }, 77 [DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { mga_control, 1, 1 }, 78 [DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic, 1, 1 }, 79 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 }, 80 [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = { mga_addbufs, 1, 1 }, 81 [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = { mga_markbufs, 1, 1 }, 82 [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = { mga_infobufs, 1, 0 }, 83 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = { mga_mapbufs, 1, 0 }, 84 [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = { mga_freebufs, 1, 0 }, 85 86 [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { mga_addctx, 1, 1 }, 87 [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { mga_rmctx, 1, 1 }, 88 [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { mga_modctx, 1, 1 }, 89 [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { mga_getctx, 1, 0 }, 90 [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { mga_switchctx, 1, 1 }, 91 [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { mga_newctx, 1, 1 }, 92 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { mga_resctx, 1, 0 }, 93 [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, 1, 1 }, 94 [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, 1, 1 }, 95 96 [DRM_IOCTL_NR(DRM_IOCTL_DMA)] = { mga_dma, 1, 0 }, 97 98 [DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { mga_lock, 1, 0 }, 99 [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { mga_unlock, 1, 0 }, 100 [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_finish, 1, 0 }, 101 102 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { drm_agp_acquire, 1, 1 }, 103 [DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release, 1, 1 }, 104 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { drm_agp_enable, 1, 1 }, 105 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { drm_agp_info, 1, 0 }, 106 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = { drm_agp_alloc, 1, 1 }, 107 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = { drm_agp_free, 1, 1 }, 108 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = { drm_agp_bind, 1, 1 }, 109 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = { drm_agp_unbind, 1, 1 }, 110 [DRM_IOCTL_NR(DRM_IOCTL_MGA_INIT)] = { mga_dma_init, 1, 1 }, 111 [DRM_IOCTL_NR(DRM_IOCTL_MGA_SWAP)] = { mga_swap_bufs, 1, 0 }, 112 [DRM_IOCTL_NR(DRM_IOCTL_MGA_CLEAR)] = { mga_clear_bufs, 1, 0 }, 113 [DRM_IOCTL_NR(DRM_IOCTL_MGA_ILOAD)] = { mga_iload, 1, 0 }, 114 [DRM_IOCTL_NR(DRM_IOCTL_MGA_VERTEX)] = { mga_vertex, 1, 0 }, 115 [DRM_IOCTL_NR(DRM_IOCTL_MGA_FLUSH)] = { mga_flush_ioctl, 1, 0 }, 116 [DRM_IOCTL_NR(DRM_IOCTL_MGA_INDICES)] = { mga_indices, 1, 0 }, 117}; 118 119#define MGA_IOCTL_COUNT DRM_ARRAY_SIZE(mga_ioctls) 120 121#ifdef MODULE 122static char *mga = NULL; 123#endif 124 125MODULE_AUTHOR("VA Linux Systems, Inc."); 126MODULE_DESCRIPTION("Matrox G200/G400"); 127MODULE_LICENSE("GPL and additional rights"); 128MODULE_PARM(mga, "s"); 129 130#ifndef MODULE 131/* mga_options is called by the kernel to parse command-line options passed 132 * via the boot-loader (e.g., LILO). It calls the insmod option routine, 133 * drm_parse_drm. 134 */ 135 136static int __init mga_options(char *str) 137{ 138 drm_parse_options(str); 139 return 1; 140} 141 142__setup("mga=", mga_options); 143#endif 144 145static int mga_setup(drm_device_t *dev) 146{ 147 int i; 148 149 atomic_set(&dev->ioctl_count, 0); 150 atomic_set(&dev->vma_count, 0); 151 dev->buf_use = 0; 152 atomic_set(&dev->buf_alloc, 0); 153 154 drm_dma_setup(dev); 155 156 atomic_set(&dev->total_open, 0); 157 atomic_set(&dev->total_close, 0); 158 atomic_set(&dev->total_ioctl, 0); 159 atomic_set(&dev->total_irq, 0); 160 atomic_set(&dev->total_ctx, 0); 161 atomic_set(&dev->total_locks, 0); 162 atomic_set(&dev->total_unlocks, 0); 163 atomic_set(&dev->total_contends, 0); 164 atomic_set(&dev->total_sleeps, 0); 165 166 for (i = 0; i < DRM_HASH_SIZE; i++) { 167 dev->magiclist[i].head = NULL; 168 dev->magiclist[i].tail = NULL; 169 } 170 dev->maplist = NULL; 171 dev->map_count = 0; 172 dev->vmalist = NULL; 173 dev->lock.hw_lock = NULL; 174 init_waitqueue_head(&dev->lock.lock_queue); 175 dev->queue_count = 0; 176 dev->queue_reserved = 0; 177 dev->queue_slots = 0; 178 dev->queuelist = NULL; 179 dev->irq = 0; 180 dev->context_flag = 0; 181 dev->interrupt_flag = 0; 182 dev->dma_flag = 0; 183 dev->last_context = 0; 184 dev->last_switch = 0; 185 dev->last_checked = 0; 186 init_timer(&dev->timer); 187 init_waitqueue_head(&dev->context_wait); 188 189 dev->ctx_start = 0; 190 dev->lck_start = 0; 191 192 dev->buf_rp = dev->buf; 193 dev->buf_wp = dev->buf; 194 dev->buf_end = dev->buf + DRM_BSZ; 195 dev->buf_async = NULL; 196 init_waitqueue_head(&dev->buf_readers); 197 init_waitqueue_head(&dev->buf_writers); 198 199 DRM_DEBUG("\n"); 200 201 /* The kernel's context could be created here, but is now created 202 in drm_dma_enqueue. This is more resource-efficient for 203 hardware that does not do DMA, but may mean that 204 drm_select_queue fails between the time the interrupt is 205 initialized and the time the queues are initialized. */ 206 207 return 0; 208} 209 210 211static int mga_takedown(drm_device_t *dev) 212{ 213 int i; 214 drm_magic_entry_t *pt, *next; 215 drm_map_t *map; 216 drm_vma_entry_t *vma, *vma_next; 217 218 DRM_DEBUG("\n"); 219 220 if (dev->dev_private) mga_dma_cleanup(dev); 221 if (dev->irq) mga_irq_uninstall(dev); 222 223 down(&dev->struct_sem); 224 del_timer(&dev->timer); 225 226 if (dev->devname) { 227 drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER); 228 dev->devname = NULL; 229 } 230 231 if (dev->unique) { 232 drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER); 233 dev->unique = NULL; 234 dev->unique_len = 0; 235 } 236 /* Clear pid list */ 237 for (i = 0; i < DRM_HASH_SIZE; i++) { 238 for (pt = dev->magiclist[i].head; pt; pt = next) { 239 next = pt->next; 240 drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC); 241 } 242 dev->magiclist[i].head = dev->magiclist[i].tail = NULL; 243 } 244 /* Clear AGP information */ 245 if (dev->agp) { 246 drm_agp_mem_t *entry; 247 drm_agp_mem_t *nexte; 248 249 /* Remove AGP resources, but leave dev->agp 250 intact until cleanup is called. */ 251 for (entry = dev->agp->memory; entry; entry = nexte) { 252 nexte = entry->next; 253 if (entry->bound) drm_unbind_agp(entry->memory); 254 drm_free_agp(entry->memory, entry->pages); 255 drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); 256 } 257 dev->agp->memory = NULL; 258 259 if (dev->agp->acquired) _drm_agp_release(); 260 261 dev->agp->acquired = 0; 262 dev->agp->enabled = 0; 263 } 264 /* Clear vma list (only built for debugging) */ 265 if (dev->vmalist) { 266 for (vma = dev->vmalist; vma; vma = vma_next) { 267 vma_next = vma->next; 268 drm_free(vma, sizeof(*vma), DRM_MEM_VMAS); 269 } 270 dev->vmalist = NULL; 271 } 272 273 /* Clear map area and mtrr information */ 274 if (dev->maplist) { 275 for (i = 0; i < dev->map_count; i++) { 276 map = dev->maplist[i]; 277 switch (map->type) { 278 case _DRM_REGISTERS: 279 case _DRM_FRAME_BUFFER: 280#ifdef CONFIG_MTRR 281 if (map->mtrr >= 0) { 282 int retcode; 283 retcode = mtrr_del(map->mtrr, 284 map->offset, 285 map->size); 286 DRM_DEBUG("mtrr_del = %d\n", retcode); 287 } 288#endif 289 drm_ioremapfree(map->handle, map->size); 290 break; 291 case _DRM_SHM: 292 drm_free_pages((unsigned long)map->handle, 293 drm_order(map->size) 294 - PAGE_SHIFT, 295 DRM_MEM_SAREA); 296 break; 297 case _DRM_AGP: 298 break; 299 } 300 drm_free(map, sizeof(*map), DRM_MEM_MAPS); 301 } 302 drm_free(dev->maplist, 303 dev->map_count * sizeof(*dev->maplist), 304 DRM_MEM_MAPS); 305 dev->maplist = NULL; 306 dev->map_count = 0; 307 } 308 309 if (dev->queuelist) { 310 for (i = 0; i < dev->queue_count; i++) { 311 drm_waitlist_destroy(&dev->queuelist[i]->waitlist); 312 if (dev->queuelist[i]) { 313 drm_free(dev->queuelist[i], 314 sizeof(*dev->queuelist[0]), 315 DRM_MEM_QUEUES); 316 dev->queuelist[i] = NULL; 317 } 318 } 319 drm_free(dev->queuelist, 320 dev->queue_slots * sizeof(*dev->queuelist), 321 DRM_MEM_QUEUES); 322 dev->queuelist = NULL; 323 } 324 325 drm_dma_takedown(dev); 326 327 dev->queue_count = 0; 328 if (dev->lock.hw_lock) { 329 dev->lock.hw_lock = NULL; /* SHM removed */ 330 dev->lock.pid = 0; 331 wake_up_interruptible(&dev->lock.lock_queue); 332 } 333 up(&dev->struct_sem); 334 335 return 0; 336} 337 338/* mga_init is called via init_module at module load time, or via 339 * linux/init/main.c (this is not currently supported). */ 340 341static int __init mga_init(void) 342{ 343 int retcode; 344 drm_device_t *dev = &mga_device; 345 346 DRM_DEBUG("\n"); 347 348 memset((void *)dev, 0, sizeof(*dev)); 349 dev->count_lock = SPIN_LOCK_UNLOCKED; 350 sema_init(&dev->struct_sem, 1); 351 352#ifdef MODULE 353 drm_parse_options(mga); 354#endif 355 if ((retcode = misc_register(&mga_misc))) { 356 DRM_ERROR("Cannot register \"%s\"\n", MGA_NAME); 357 return retcode; 358 } 359 dev->device = MKDEV(MISC_MAJOR, mga_misc.minor); 360 dev->name = MGA_NAME; 361 362 drm_mem_init(); 363 drm_proc_init(dev); 364 dev->agp = drm_agp_init(); 365 if(dev->agp == NULL) { 366 DRM_INFO("The mga drm module requires the agpgart module" 367 " to function correctly\nPlease load the agpgart" 368 " module before you load the mga module\n"); 369 drm_proc_cleanup(); 370 misc_deregister(&mga_misc); 371 mga_takedown(dev); 372 return -ENOMEM; 373 } 374#ifdef CONFIG_MTRR 375 dev->agp->agp_mtrr = mtrr_add(dev->agp->agp_info.aper_base, 376 dev->agp->agp_info.aper_size * 1024 * 1024, 377 MTRR_TYPE_WRCOMB, 378 1); 379#endif 380 if((retcode = drm_ctxbitmap_init(dev))) { 381 DRM_ERROR("Cannot allocate memory for context bitmap.\n"); 382 drm_proc_cleanup(); 383 misc_deregister(&mga_misc); 384 mga_takedown(dev); 385 return retcode; 386 } 387 388 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", 389 MGA_NAME, 390 MGA_MAJOR, 391 MGA_MINOR, 392 MGA_PATCHLEVEL, 393 MGA_DATE, 394 mga_misc.minor); 395 396 return 0; 397} 398 399/* mga_cleanup is called via cleanup_module at module unload time. */ 400 401static void __exit mga_cleanup(void) 402{ 403 drm_device_t *dev = &mga_device; 404 405 DRM_DEBUG("\n"); 406 407 drm_proc_cleanup(); 408 if (misc_deregister(&mga_misc)) { 409 DRM_ERROR("Cannot unload module\n"); 410 } else { 411 DRM_INFO("Module unloaded\n"); 412 } 413 drm_ctxbitmap_cleanup(dev); 414#ifdef CONFIG_MTRR 415 if(dev->agp && dev->agp->agp_mtrr) { 416 int retval; 417 retval = mtrr_del(dev->agp->agp_mtrr, 418 dev->agp->agp_info.aper_base, 419 dev->agp->agp_info.aper_size * 1024*1024); 420 DRM_DEBUG("mtrr_del = %d\n", retval); 421 } 422#endif 423 424 mga_takedown(dev); 425 if (dev->agp) { 426 drm_agp_uninit(); 427 drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS); 428 dev->agp = NULL; 429 } 430} 431 432module_init(mga_init); 433module_exit(mga_cleanup); 434 435 436int mga_version(struct inode *inode, struct file *filp, unsigned int cmd, 437 unsigned long arg) 438{ 439 drm_version_t version; 440 int len; 441 442 if (copy_from_user(&version, 443 (drm_version_t *)arg, 444 sizeof(version))) 445 return -EFAULT; 446 447#define DRM_COPY(name,value) \ 448 len = strlen(value); \ 449 if (len > name##_len) len = name##_len; \ 450 name##_len = strlen(value); \ 451 if (len && name) { \ 452 if (copy_to_user(name, value, len)) \ 453 return -EFAULT; \ 454 } 455 456 version.version_major = MGA_MAJOR; 457 version.version_minor = MGA_MINOR; 458 version.version_patchlevel = MGA_PATCHLEVEL; 459 460 DRM_COPY(version.name, MGA_NAME); 461 DRM_COPY(version.date, MGA_DATE); 462 DRM_COPY(version.desc, MGA_DESC); 463 464 if (copy_to_user((drm_version_t *)arg, 465 &version, 466 sizeof(version))) 467 return -EFAULT; 468 return 0; 469} 470 471int mga_open(struct inode *inode, struct file *filp) 472{ 473 drm_device_t *dev = &mga_device; 474 int retcode = 0; 475 476 DRM_DEBUG("open_count = %d\n", dev->open_count); 477 if (!(retcode = drm_open_helper(inode, filp, dev))) { 478#if LINUX_VERSION_CODE < 0x020333 479 MOD_INC_USE_COUNT; /* Needed before Linux 2.3.51 */ 480#endif 481 atomic_inc(&dev->total_open); 482 spin_lock(&dev->count_lock); 483 if (!dev->open_count++) { 484 spin_unlock(&dev->count_lock); 485 return mga_setup(dev); 486 } 487 spin_unlock(&dev->count_lock); 488 } 489 return retcode; 490} 491 492int mga_release(struct inode *inode, struct file *filp) 493{ 494 drm_file_t *priv = filp->private_data; 495 drm_device_t *dev; 496 int retcode = 0; 497 498 lock_kernel(); 499 dev = priv->dev; 500 DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d\n", 501 current->pid, dev->device, dev->open_count); 502 503 if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) 504 && dev->lock.pid == current->pid) { 505 mga_reclaim_buffers(dev, priv->pid); 506 DRM_INFO("Process %d dead (ctx %d, d_s = 0x%02lx)\n", 507 current->pid, 508 _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock), 509 dev->dev_private ? 510 ((drm_mga_private_t *)dev->dev_private) 511 ->dispatch_status 512 : 0); 513 514 if (dev->dev_private) 515 ((drm_mga_private_t *)dev->dev_private) 516 ->dispatch_status &= MGA_IN_DISPATCH; 517 518 drm_lock_free(dev, 519 &dev->lock.hw_lock->lock, 520 _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)); 521 } else if (dev->lock.hw_lock) { 522 /* The lock is required to reclaim buffers */ 523 DECLARE_WAITQUEUE(entry, current); 524 add_wait_queue(&dev->lock.lock_queue, &entry); 525 for (;;) { 526 current->state = TASK_INTERRUPTIBLE; 527 if (!dev->lock.hw_lock) { 528 /* Device has been unregistered */ 529 retcode = -EINTR; 530 break; 531 } 532 if (drm_lock_take(&dev->lock.hw_lock->lock, 533 DRM_KERNEL_CONTEXT)) { 534 dev->lock.pid = priv->pid; 535 dev->lock.lock_time = jiffies; 536 atomic_inc(&dev->total_locks); 537 break; /* Got lock */ 538 } 539 /* Contention */ 540 atomic_inc(&dev->total_sleeps); 541 schedule(); 542 if (signal_pending(current)) { 543 retcode = -ERESTARTSYS; 544 break; 545 } 546 } 547 current->state = TASK_RUNNING; 548 remove_wait_queue(&dev->lock.lock_queue, &entry); 549 if(!retcode) { 550 mga_reclaim_buffers(dev, priv->pid); 551 if (dev->dev_private) 552 ((drm_mga_private_t *)dev->dev_private) 553 ->dispatch_status &= MGA_IN_DISPATCH; 554 drm_lock_free(dev, &dev->lock.hw_lock->lock, 555 DRM_KERNEL_CONTEXT); 556 } 557 } 558 drm_fasync(-1, filp, 0); 559 560 down(&dev->struct_sem); 561 if (priv->remove_auth_on_close == 1) { 562 drm_file_t *temp = dev->file_first; 563 while(temp) { 564 temp->authenticated = 0; 565 temp = temp->next; 566 } 567 } 568 if (priv->prev) priv->prev->next = priv->next; 569 else dev->file_first = priv->next; 570 if (priv->next) priv->next->prev = priv->prev; 571 else dev->file_last = priv->prev; 572 up(&dev->struct_sem); 573 574 drm_free(priv, sizeof(*priv), DRM_MEM_FILES); 575#if LINUX_VERSION_CODE < 0x020333 576 MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */ 577#endif 578 atomic_inc(&dev->total_close); 579 spin_lock(&dev->count_lock); 580 if (!--dev->open_count) { 581 if (atomic_read(&dev->ioctl_count) || dev->blocked) { 582 DRM_ERROR("Device busy: %d %d\n", 583 atomic_read(&dev->ioctl_count), 584 dev->blocked); 585 spin_unlock(&dev->count_lock); 586 unlock_kernel(); 587 return -EBUSY; 588 } 589 spin_unlock(&dev->count_lock); 590 unlock_kernel(); 591 return mga_takedown(dev); 592 } 593 spin_unlock(&dev->count_lock); 594 unlock_kernel(); 595 return retcode; 596} 597 598 599/* drm_ioctl is called whenever a process performs an ioctl on /dev/drm. */ 600 601int mga_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, 602 unsigned long arg) 603{ 604 int nr = DRM_IOCTL_NR(cmd); 605 drm_file_t *priv = filp->private_data; 606 drm_device_t *dev = priv->dev; 607 int retcode = 0; 608 drm_ioctl_desc_t *ioctl; 609 drm_ioctl_t *func; 610 611 atomic_inc(&dev->ioctl_count); 612 atomic_inc(&dev->total_ioctl); 613 ++priv->ioctl_count; 614 615 if (nr >= MGA_IOCTL_COUNT) { 616 retcode = -EINVAL; 617 } else { 618 ioctl = &mga_ioctls[nr]; 619 func = ioctl->func; 620 621 if (!func) { 622 DRM_DEBUG("no function: pid = %d, cmd = 0x%02x," 623 " nr = 0x%02x, dev 0x%x, auth = %d\n", 624 current->pid, cmd, nr, dev->device, 625 priv->authenticated); 626 retcode = -EINVAL; 627 } else if ((ioctl->root_only && !capable(CAP_SYS_ADMIN)) 628 || (ioctl->auth_needed && !priv->authenticated)) { 629 retcode = -EACCES; 630 } else { 631 retcode = (func)(inode, filp, cmd, arg); 632 } 633 } 634 635 atomic_dec(&dev->ioctl_count); 636 return retcode; 637} 638 639int mga_unlock(struct inode *inode, struct file *filp, unsigned int cmd, 640 unsigned long arg) 641{ 642 drm_file_t *priv = filp->private_data; 643 drm_device_t *dev = priv->dev; 644 drm_lock_t lock; 645 646 if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock))) 647 return -EFAULT; 648 649 if (lock.context == DRM_KERNEL_CONTEXT) { 650 DRM_ERROR("Process %d using kernel context %d\n", 651 current->pid, lock.context); 652 return -EINVAL; 653 } 654 655 atomic_inc(&dev->total_unlocks); 656 if (_DRM_LOCK_IS_CONT(dev->lock.hw_lock->lock)) 657 atomic_inc(&dev->total_contends); 658 drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT); 659 mga_dma_schedule(dev, 1); 660 661 if (drm_lock_free(dev, &dev->lock.hw_lock->lock, 662 DRM_KERNEL_CONTEXT)) DRM_ERROR("\n"); 663 664 unblock_all_signals(); 665 return 0; 666} 667