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_LICENSE("GPL and additional rights");
128 MODULE_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
mga_options(char * str)136 static 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
mga_setup(drm_device_t * dev)145 static 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
mga_takedown(drm_device_t * dev)211 static 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, dev);
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
mga_init(void)341 static 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
mga_cleanup(void)401 static 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
432 module_init(mga_init);
433 module_exit(mga_cleanup);
434
435
mga_version(struct inode * inode,struct file * filp,unsigned int cmd,unsigned long arg)436 int 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
mga_open(struct inode * inode,struct file * filp)471 int 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
mga_release(struct inode * inode,struct file * filp)492 int 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
mga_ioctl(struct inode * inode,struct file * filp,unsigned int cmd,unsigned long arg)601 int 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
mga_unlock(struct inode * inode,struct file * filp,unsigned int cmd,unsigned long arg)639 int 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