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- Andries Brouwer: final isofs pieces.
[davej-history.git] / drivers / char / drm / mga_drv.c
blob3937d97174ed560a18c19f7a8aa90e47817eb86f
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
44 static drm_device_t mga_device;
45 drm_ctx_t mga_res_ctx;
46
47 static 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
62 static struct miscdevice mga_misc = {
63 minor: MISC_DYNAMIC_MINOR,
64 name: MGA_NAME,
65 fops: &mga_fops,
66 };
67
68 static 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
122 static char *mga = NULL;
123 #endif
124
125 MODULE_AUTHOR("VA Linux Systems, Inc.");
126 MODULE_DESCRIPTION("Matrox G200/G400");
127 MODULE_PARM(mga, "s");
128
129 #ifndef MODULE
130 /* mga_options is called by the kernel to parse command-line options passed
131 * via the boot-loader (e.g., LILO). It calls the insmod option routine,
132 * drm_parse_drm.
133 */
134
135 static int __init mga_options(char *str)
136 {
137 drm_parse_options(str);
138 return 1;
139 }
140
141 __setup("mga=", mga_options);
142 #endif
143
144 static int mga_setup(drm_device_t *dev)
145 {
146 int i;
147
148 atomic_set(&dev->ioctl_count, 0);
149 atomic_set(&dev->vma_count, 0);
150 dev->buf_use = 0;
151 atomic_set(&dev->buf_alloc, 0);
152
153 drm_dma_setup(dev);
154
155 atomic_set(&dev->total_open, 0);
156 atomic_set(&dev->total_close, 0);
157 atomic_set(&dev->total_ioctl, 0);
158 atomic_set(&dev->total_irq, 0);
159 atomic_set(&dev->total_ctx, 0);
160 atomic_set(&dev->total_locks, 0);
161 atomic_set(&dev->total_unlocks, 0);
162 atomic_set(&dev->total_contends, 0);
163 atomic_set(&dev->total_sleeps, 0);
164
165 for (i = 0; i < DRM_HASH_SIZE; i++) {
166 dev->magiclist[i].head = NULL;
167 dev->magiclist[i].tail = NULL;
168 }
169 dev->maplist = NULL;
170 dev->map_count = 0;
171 dev->vmalist = NULL;
172 dev->lock.hw_lock = NULL;
173 init_waitqueue_head(&dev->lock.lock_queue);
174 dev->queue_count = 0;
175 dev->queue_reserved = 0;
176 dev->queue_slots = 0;
177 dev->queuelist = NULL;
178 dev->irq = 0;
179 dev->context_flag = 0;
180 dev->interrupt_flag = 0;
181 dev->dma_flag = 0;
182 dev->last_context = 0;
183 dev->last_switch = 0;
184 dev->last_checked = 0;
185 init_timer(&dev->timer);
186 init_waitqueue_head(&dev->context_wait);
187
188 dev->ctx_start = 0;
189 dev->lck_start = 0;
190
191 dev->buf_rp = dev->buf;
192 dev->buf_wp = dev->buf;
193 dev->buf_end = dev->buf + DRM_BSZ;
194 dev->buf_async = NULL;
195 init_waitqueue_head(&dev->buf_readers);
196 init_waitqueue_head(&dev->buf_writers);
197
198 DRM_DEBUG("\n");
199
200 /* The kernel's context could be created here, but is now created
201 in drm_dma_enqueue. This is more resource-efficient for
202 hardware that does not do DMA, but may mean that
203 drm_select_queue fails between the time the interrupt is
204 initialized and the time the queues are initialized. */
205
206 return 0;
207 }
208
209
210 static int mga_takedown(drm_device_t *dev)
211 {
212 int i;
213 drm_magic_entry_t *pt, *next;
214 drm_map_t *map;
215 drm_vma_entry_t *vma, *vma_next;
216
217 DRM_DEBUG("\n");
218
219 if (dev->dev_private) mga_dma_cleanup(dev);
220 if (dev->irq) mga_irq_uninstall(dev);
221
222 down(&dev->struct_sem);
223 del_timer(&dev->timer);
224
225 if (dev->devname) {
226 drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
227 dev->devname = NULL;
228 }
229
230 if (dev->unique) {
231 drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
232 dev->unique = NULL;
233 dev->unique_len = 0;
234 }
235 /* Clear pid list */
236 for (i = 0; i < DRM_HASH_SIZE; i++) {
237 for (pt = dev->magiclist[i].head; pt; pt = next) {
238 next = pt->next;
239 drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
240 }
241 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
242 }
243 /* Clear AGP information */
244 if (dev->agp) {
245 drm_agp_mem_t *entry;
246 drm_agp_mem_t *nexte;
247
248 /* Remove AGP resources, but leave dev->agp
249 intact until cleanup is called. */
250 for (entry = dev->agp->memory; entry; entry = nexte) {
251 nexte = entry->next;
252 if (entry->bound) drm_unbind_agp(entry->memory);
253 drm_free_agp(entry->memory, entry->pages);
254 drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
255 }
256 dev->agp->memory = NULL;
257
258 if (dev->agp->acquired) _drm_agp_release();
259
260 dev->agp->acquired = 0;
261 dev->agp->enabled = 0;
262 }
263 /* Clear vma list (only built for debugging) */
264 if (dev->vmalist) {
265 for (vma = dev->vmalist; vma; vma = vma_next) {
266 vma_next = vma->next;
267 drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
268 }
269 dev->vmalist = NULL;
270 }
271
272 /* Clear map area and mtrr information */
273 if (dev->maplist) {
274 for (i = 0; i < dev->map_count; i++) {
275 map = dev->maplist[i];
276 switch (map->type) {
277 case _DRM_REGISTERS:
278 case _DRM_FRAME_BUFFER:
279 #ifdef CONFIG_MTRR
280 if (map->mtrr >= 0) {
281 int retcode;
282 retcode = mtrr_del(map->mtrr,
283 map->offset,
284 map->size);
285 DRM_DEBUG("mtrr_del = %d\n", retcode);
286 }
287 #endif
288 drm_ioremapfree(map->handle, map->size);
289 break;
290 case _DRM_SHM:
291 drm_free_pages((unsigned long)map->handle,
292 drm_order(map->size)
293 - PAGE_SHIFT,
294 DRM_MEM_SAREA);
295 break;
296 case _DRM_AGP:
297 break;
298 }
299 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
300 }
301 drm_free(dev->maplist,
302 dev->map_count * sizeof(*dev->maplist),
303 DRM_MEM_MAPS);
304 dev->maplist = NULL;
305 dev->map_count = 0;
306 }
307
308 if (dev->queuelist) {
309 for (i = 0; i < dev->queue_count; i++) {
310 drm_waitlist_destroy(&dev->queuelist[i]->waitlist);
311 if (dev->queuelist[i]) {
312 drm_free(dev->queuelist[i],
313 sizeof(*dev->queuelist[0]),
314 DRM_MEM_QUEUES);
315 dev->queuelist[i] = NULL;
316 }
317 }
318 drm_free(dev->queuelist,
319 dev->queue_slots * sizeof(*dev->queuelist),
320 DRM_MEM_QUEUES);
321 dev->queuelist = NULL;
322 }
323
324 drm_dma_takedown(dev);
325
326 dev->queue_count = 0;
327 if (dev->lock.hw_lock) {
328 dev->lock.hw_lock = NULL; /* SHM removed */
329 dev->lock.pid = 0;
330 wake_up_interruptible(&dev->lock.lock_queue);
331 }
332 up(&dev->struct_sem);
333
334 return 0;
335 }
336
337 /* mga_init is called via init_module at module load time, or via
338 * linux/init/main.c (this is not currently supported). */
339
340 static int __init mga_init(void)
341 {
342 int retcode;
343 drm_device_t *dev = &mga_device;
344
345 DRM_DEBUG("\n");
346
347 memset((void *)dev, 0, sizeof(*dev));
348 dev->count_lock = SPIN_LOCK_UNLOCKED;
349 sema_init(&dev->struct_sem, 1);
350
351 #ifdef MODULE
352 drm_parse_options(mga);
353 #endif
354 if ((retcode = misc_register(&mga_misc))) {
355 DRM_ERROR("Cannot register \"%s\"\n", MGA_NAME);
356 return retcode;
357 }
358 dev->device = MKDEV(MISC_MAJOR, mga_misc.minor);
359 dev->name = MGA_NAME;
360
361 drm_mem_init();
362 drm_proc_init(dev);
363 dev->agp = drm_agp_init();
364 if(dev->agp == NULL) {
365 DRM_INFO("The mga drm module requires the agpgart module"
366 " to function correctly\nPlease load the agpgart"
367 " module before you load the mga module\n");
368 drm_proc_cleanup();
369 misc_deregister(&mga_misc);
370 mga_takedown(dev);
371 return -ENOMEM;
372 }
373 #ifdef CONFIG_MTRR
374 dev->agp->agp_mtrr = mtrr_add(dev->agp->agp_info.aper_base,
375 dev->agp->agp_info.aper_size * 1024 * 1024,
376 MTRR_TYPE_WRCOMB,
377 1);
378 #endif
379 if((retcode = drm_ctxbitmap_init(dev))) {
380 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
381 drm_proc_cleanup();
382 misc_deregister(&mga_misc);
383 mga_takedown(dev);
384 return retcode;
385 }
386
387 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
388 MGA_NAME,
389 MGA_MAJOR,
390 MGA_MINOR,
391 MGA_PATCHLEVEL,
392 MGA_DATE,
393 mga_misc.minor);
394
395 return 0;
396 }
397
398 /* mga_cleanup is called via cleanup_module at module unload time. */
399
400 static void __exit mga_cleanup(void)
401 {
402 drm_device_t *dev = &mga_device;
403
404 DRM_DEBUG("\n");
405
406 drm_proc_cleanup();
407 if (misc_deregister(&mga_misc)) {
408 DRM_ERROR("Cannot unload module\n");
409 } else {
410 DRM_INFO("Module unloaded\n");
411 }
412 drm_ctxbitmap_cleanup(dev);
413 #ifdef CONFIG_MTRR
414 if(dev->agp && dev->agp->agp_mtrr) {
415 int retval;
416 retval = mtrr_del(dev->agp->agp_mtrr,
417 dev->agp->agp_info.aper_base,
418 dev->agp->agp_info.aper_size * 1024*1024);
419 DRM_DEBUG("mtrr_del = %d\n", retval);
420 }
421 #endif
422
423 mga_takedown(dev);
424 if (dev->agp) {
425 drm_agp_uninit();
426 drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS);
427 dev->agp = NULL;
428 }
429 }
430
431 module_init(mga_init);
432 module_exit(mga_cleanup);
433
434
435 int mga_version(struct inode *inode, struct file *filp, unsigned int cmd,
436 unsigned long arg)
437 {
438 drm_version_t version;
439 int len;
440
441 if (copy_from_user(&version,
442 (drm_version_t *)arg,
443 sizeof(version)))
444 return -EFAULT;
445
446 #define DRM_COPY(name,value) \
447 len = strlen(value); \
448 if (len > name##_len) len = name##_len; \
449 name##_len = strlen(value); \
450 if (len && name) { \
451 if (copy_to_user(name, value, len)) \
452 return -EFAULT; \
453 }
454
455 version.version_major = MGA_MAJOR;
456 version.version_minor = MGA_MINOR;
457 version.version_patchlevel = MGA_PATCHLEVEL;
458
459 DRM_COPY(version.name, MGA_NAME);
460 DRM_COPY(version.date, MGA_DATE);
461 DRM_COPY(version.desc, MGA_DESC);
462
463 if (copy_to_user((drm_version_t *)arg,
464 &version,
465 sizeof(version)))
466 return -EFAULT;
467 return 0;
468 }
469
470 int mga_open(struct inode *inode, struct file *filp)
471 {
472 drm_device_t *dev = &mga_device;
473 int retcode = 0;
474
475 DRM_DEBUG("open_count = %d\n", dev->open_count);
476 if (!(retcode = drm_open_helper(inode, filp, dev))) {
477 #if LINUX_VERSION_CODE < 0x020333
478 MOD_INC_USE_COUNT; /* Needed before Linux 2.3.51 */
479 #endif
480 atomic_inc(&dev->total_open);
481 spin_lock(&dev->count_lock);
482 if (!dev->open_count++) {
483 spin_unlock(&dev->count_lock);
484 return mga_setup(dev);
485 }
486 spin_unlock(&dev->count_lock);
487 }
488 return retcode;
489 }
490
491 int mga_release(struct inode *inode, struct file *filp)
492 {
493 drm_file_t *priv = filp->private_data;
494 drm_device_t *dev;
495 int retcode = 0;
496
497 lock_kernel();
498 dev = priv->dev;
499 DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d\n",
500 current->pid, dev->device, dev->open_count);
501
502 if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
503 && dev->lock.pid == current->pid) {
504 mga_reclaim_buffers(dev, priv->pid);
505 DRM_INFO("Process %d dead (ctx %d, d_s = 0x%02lx)\n",
506 current->pid,
507 _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock),
508 dev->dev_private ?
509 ((drm_mga_private_t *)dev->dev_private)
510 ->dispatch_status
511 : 0);
512
513 if (dev->dev_private)
514 ((drm_mga_private_t *)dev->dev_private)
515 ->dispatch_status &= MGA_IN_DISPATCH;
516
517 drm_lock_free(dev,
518 &dev->lock.hw_lock->lock,
519 _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
520 } else if (dev->lock.hw_lock) {
521 /* The lock is required to reclaim buffers */
522 DECLARE_WAITQUEUE(entry, current);
523 add_wait_queue(&dev->lock.lock_queue, &entry);
524 for (;;) {
525 current->state = TASK_INTERRUPTIBLE;
526 if (!dev->lock.hw_lock) {
527 /* Device has been unregistered */
528 retcode = -EINTR;
529 break;
530 }
531 if (drm_lock_take(&dev->lock.hw_lock->lock,
532 DRM_KERNEL_CONTEXT)) {
533 dev->lock.pid = priv->pid;
534 dev->lock.lock_time = jiffies;
535 atomic_inc(&dev->total_locks);
536 break; /* Got lock */
537 }
538 /* Contention */
539 atomic_inc(&dev->total_sleeps);
540 schedule();
541 if (signal_pending(current)) {
542 retcode = -ERESTARTSYS;
543 break;
544 }
545 }
546 current->state = TASK_RUNNING;
547 remove_wait_queue(&dev->lock.lock_queue, &entry);
548 if(!retcode) {
549 mga_reclaim_buffers(dev, priv->pid);
550 if (dev->dev_private)
551 ((drm_mga_private_t *)dev->dev_private)
552 ->dispatch_status &= MGA_IN_DISPATCH;
553 drm_lock_free(dev, &dev->lock.hw_lock->lock,
554 DRM_KERNEL_CONTEXT);
555 }
556 }
557 drm_fasync(-1, filp, 0);
558
559 down(&dev->struct_sem);
560 if (priv->remove_auth_on_close == 1) {
561 drm_file_t *temp = dev->file_first;
562 while(temp) {
563 temp->authenticated = 0;
564 temp = temp->next;
565 }
566 }
567 if (priv->prev) priv->prev->next = priv->next;
568 else dev->file_first = priv->next;
569 if (priv->next) priv->next->prev = priv->prev;
570 else dev->file_last = priv->prev;
571 up(&dev->struct_sem);
572
573 drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
574 #if LINUX_VERSION_CODE < 0x020333
575 MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */
576 #endif
577 atomic_inc(&dev->total_close);
578 spin_lock(&dev->count_lock);
579 if (!--dev->open_count) {
580 if (atomic_read(&dev->ioctl_count) || dev->blocked) {
581 DRM_ERROR("Device busy: %d %d\n",
582 atomic_read(&dev->ioctl_count),
583 dev->blocked);
584 spin_unlock(&dev->count_lock);
585 unlock_kernel();
586 return -EBUSY;
587 }
588 spin_unlock(&dev->count_lock);
589 unlock_kernel();
590 return mga_takedown(dev);
591 }
592 spin_unlock(&dev->count_lock);
593 unlock_kernel();
594 return retcode;
595 }
596
597
598 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm. */
599
600 int mga_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
601 unsigned long arg)
602 {
603 int nr = DRM_IOCTL_NR(cmd);
604 drm_file_t *priv = filp->private_data;
605 drm_device_t *dev = priv->dev;
606 int retcode = 0;
607 drm_ioctl_desc_t *ioctl;
608 drm_ioctl_t *func;
609
610 atomic_inc(&dev->ioctl_count);
611 atomic_inc(&dev->total_ioctl);
612 ++priv->ioctl_count;
613
614 if (nr >= MGA_IOCTL_COUNT) {
615 retcode = -EINVAL;
616 } else {
617 ioctl = &mga_ioctls[nr];
618 func = ioctl->func;
619
620 if (!func) {
621 DRM_DEBUG("no function: pid = %d, cmd = 0x%02x,"
622 " nr = 0x%02x, dev 0x%x, auth = %d\n",
623 current->pid, cmd, nr, dev->device,
624 priv->authenticated);
625 retcode = -EINVAL;
626 } else if ((ioctl->root_only && !capable(CAP_SYS_ADMIN))
627 || (ioctl->auth_needed && !priv->authenticated)) {
628 retcode = -EACCES;
629 } else {
630 retcode = (func)(inode, filp, cmd, arg);
631 }
632 }
633
634 atomic_dec(&dev->ioctl_count);
635 return retcode;
636 }
637
638 int mga_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
639 unsigned long arg)
640 {
641 drm_file_t *priv = filp->private_data;
642 drm_device_t *dev = priv->dev;
643 drm_lock_t lock;
644
645 if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
646 return -EFAULT;
647
648 if (lock.context == DRM_KERNEL_CONTEXT) {
649 DRM_ERROR("Process %d using kernel context %d\n",
650 current->pid, lock.context);
651 return -EINVAL;
652 }
653
654 atomic_inc(&dev->total_unlocks);
655 if (_DRM_LOCK_IS_CONT(dev->lock.hw_lock->lock))
656 atomic_inc(&dev->total_contends);
657 drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
658 mga_dma_schedule(dev, 1);
659
660 if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
661 DRM_KERNEL_CONTEXT)) DRM_ERROR("\n");
662
663 unblock_all_signals();
664 return 0;
665 }
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