Only release irq resources if we were actually using them.
[dragonfly.git] / sys / dev / drm / drm_drv.c
1 /*-
2  * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
3  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
4  * All Rights Reserved.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the next
14  * paragraph) shall be included in all copies or substantial portions of the
15  * Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23  * OTHER DEALINGS IN THE SOFTWARE.
24  *
25  * Authors:
26  *    Rickard E. (Rik) Faith <faith@valinux.com>
27  *    Gareth Hughes <gareth@valinux.com>
28  *
29  */
30
31 /** @file drm_drv.c
32  * The catch-all file for DRM device support, including module setup/teardown,
33  * open/close, and ioctl dispatch.
34  */
35
36 #include <machine/limits.h>
37 #include "dev/drm/drmP.h"
38 #include "dev/drm/drm.h"
39 #include "dev/drm/drm_sarea.h"
40
41 #ifdef DRM_DEBUG_DEFAULT_ON
42 int drm_debug_flag = 1;
43 #else
44 int drm_debug_flag = 0;
45 #endif
46
47 static int drm_load(struct drm_device *dev);
48 static void drm_unload(struct drm_device *dev);
49 static drm_pci_id_list_t *drm_find_description(int vendor, int device,
50     drm_pci_id_list_t *idlist);
51
52 #define DRIVER_SOFTC(unit) \
53         ((struct drm_device *)devclass_get_softc(drm_devclass, unit))
54
55 MODULE_VERSION(drm, 1);
56 MODULE_DEPEND(drm, agp, 1, 1, 1);
57 MODULE_DEPEND(drm, pci, 1, 1, 1);
58 MODULE_DEPEND(drm, mem, 1, 1, 1);
59
60 static drm_ioctl_desc_t           drm_ioctls[256] = {
61         DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
62         DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
63         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
64         DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
65         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
66         DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
67         DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
68         DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY),
69
70         DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
71         DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
72         DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
73         DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
74
75         DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
76         DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
77
78         DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
79         DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
80
81         DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
82         DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
83         DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
84         DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
85         DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
86         DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
87         DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
88
89         DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
90         DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
91
92         DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
93         DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
94
95         DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
96
97         DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
98         DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
99         DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
100         DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
101         DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
102         DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma, DRM_AUTH),
103
104         DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
105
106         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
107         DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
108         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
109         DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
110         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
111         DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
112         DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
113         DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
114
115         DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
116         DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
117         DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0),
118         DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
119         DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_draw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
120 };
121
122 static struct dev_ops drm_cdevsw = {
123         { "drm", 145, D_TRACKCLOSE },
124         .d_open =       drm_open,
125         .d_close =      drm_close,
126         .d_read =       drm_read,
127         .d_ioctl =      drm_ioctl,
128         .d_poll =       drm_poll,
129         .d_mmap =       drm_mmap
130 };
131
132 static int drm_msi = 1; /* Enable by default. */
133 TUNABLE_INT("hw.drm.msi", &drm_msi);
134
135 static struct drm_msi_blacklist_entry drm_msi_blacklist[] = {
136         {0x8086, 0x2772}, /* Intel i945G        */ \
137         {0x8086, 0x27A2}, /* Intel i945GM       */ \
138         {0x8086, 0x27AE}, /* Intel i945GME      */ \
139         {0, 0}
140 };
141
142 static int drm_msi_is_blacklisted(int vendor, int device)
143 {
144         int i = 0;
145         
146         for (i = 0; drm_msi_blacklist[i].vendor != 0; i++) {
147                 if ((drm_msi_blacklist[i].vendor == vendor) &&
148                     (drm_msi_blacklist[i].device == device)) {
149                         return 1;
150                 }
151         }
152
153         return 0;
154 }
155
156 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist)
157 {
158         drm_pci_id_list_t *id_entry;
159         int vendor, device;
160         device_t realdev;
161
162         if (!strcmp(device_get_name(kdev), "drmsub"))
163                 realdev = device_get_parent(kdev);
164         else
165                 realdev = kdev;
166         vendor = pci_get_vendor(realdev);
167         device = pci_get_device(realdev);
168
169 #if 0 /* XXX */
170         if (pci_get_class(kdev) != PCIC_DISPLAY
171             || pci_get_subclass(kdev) != PCIS_DISPLAY_VGA)
172                 return ENXIO;
173 #endif
174
175         id_entry = drm_find_description(vendor, device, idlist);
176         if (id_entry != NULL) {
177                 if (!device_get_desc(kdev)) {
178                         DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
179                         device_set_desc(kdev, id_entry->name);
180                 }
181                 return 0;
182         }
183
184         return ENXIO;
185 }
186
187 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
188 {
189         struct drm_device *dev;
190         drm_pci_id_list_t *id_entry;
191         int unit;
192 #if 0
193         int msicount;
194 #endif
195
196         unit = device_get_unit(kdev);
197         dev = device_get_softc(kdev);
198
199         if (!strcmp(device_get_name(kdev), "drmsub"))
200                 dev->device = device_get_parent(kdev);
201         else
202                 dev->device = kdev;
203
204         dev_ops_add(&drm_cdevsw, -1, unit);
205         dev->devnode = make_dev(&drm_cdevsw,
206                         unit,
207                         DRM_DEV_UID,
208                         DRM_DEV_GID,
209                         DRM_DEV_MODE,
210                         "dri/card%d", unit);
211
212         dev->pci_domain = 0;
213         dev->pci_bus = pci_get_bus(dev->device);
214         dev->pci_slot = pci_get_slot(dev->device);
215         dev->pci_func = pci_get_function(dev->device);
216
217         dev->pci_vendor = pci_get_vendor(dev->device);
218         dev->pci_device = pci_get_device(dev->device);
219
220         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
221                 if (drm_msi &&
222                     !drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) {
223 #if 0
224                         msicount = pci_msi_count(dev->device);
225                         DRM_DEBUG("MSI count = %d\n", msicount);
226                         if (msicount > 1)
227                                 msicount = 1;
228
229                         if (pci_alloc_msi(dev->device, &msicount) == 0) {
230                                 DRM_INFO("MSI enabled %d message(s)\n",
231                                     msicount);
232                                 dev->msi_enabled = 1;
233                                 dev->irqrid = 1;
234                         }
235 #endif
236                 }
237
238                 dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
239                     &dev->irqrid, RF_SHAREABLE);
240                 if (!dev->irqr) {
241                         return ENOENT;
242                 }
243
244                 dev->irq = (int) rman_get_start(dev->irqr);
245         }
246
247         DRM_SPININIT(&dev->dev_lock, "drmdev");
248         lwkt_serialize_init(&dev->irq_lock);
249         DRM_SPININIT(&dev->vbl_lock, "drmvbl");
250         DRM_SPININIT(&dev->drw_lock, "drmdrw");
251
252         id_entry = drm_find_description(dev->pci_vendor,
253             dev->pci_device, idlist);
254         dev->id_entry = id_entry;
255
256         return drm_load(dev);
257 }
258
259 int drm_detach(device_t kdev)
260 {
261         struct drm_device *dev;
262
263         dev = device_get_softc(kdev);
264
265         drm_unload(dev);
266         
267         if (dev->irqr) {
268                 bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
269                     dev->irqr);
270
271 #if 0
272                 if (dev->msi_enabled) {
273                         pci_release_msi(dev->device);
274                         DRM_INFO("MSI released\n");
275                 }
276 #endif
277         }
278
279         return 0;
280 }
281
282 #ifndef DRM_DEV_NAME
283 #define DRM_DEV_NAME "drm"
284 #endif
285
286 devclass_t drm_devclass;
287
288 drm_pci_id_list_t *drm_find_description(int vendor, int device,
289     drm_pci_id_list_t *idlist)
290 {
291         int i = 0;
292         
293         for (i = 0; idlist[i].vendor != 0; i++) {
294                 if ((idlist[i].vendor == vendor) &&
295                     ((idlist[i].device == device) ||
296                     (idlist[i].device == 0))) {
297                         return &idlist[i];
298                 }
299         }
300         return NULL;
301 }
302
303 static int drm_firstopen(struct drm_device *dev)
304 {
305         drm_local_map_t *map;
306         int i;
307
308         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
309
310         /* prebuild the SAREA */
311         i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM,
312             _DRM_CONTAINS_LOCK, &map);
313         if (i != 0)
314                 return i;
315
316         if (dev->driver->firstopen)
317                 dev->driver->firstopen(dev);
318
319         dev->buf_use = 0;
320
321         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
322                 i = drm_dma_setup(dev);
323                 if (i != 0)
324                         return i;
325         }
326
327         for (i = 0; i < DRM_HASH_SIZE; i++) {
328                 dev->magiclist[i].head = NULL;
329                 dev->magiclist[i].tail = NULL;
330         }
331
332         dev->lock.lock_queue = 0;
333         dev->irq_enabled = 0;
334         dev->context_flag = 0;
335         dev->last_context = 0;
336         dev->if_version = 0;
337
338         dev->buf_sigio = NULL;
339
340         DRM_DEBUG("\n");
341
342         return 0;
343 }
344
345 static int drm_lastclose(struct drm_device *dev)
346 {
347         drm_magic_entry_t *pt, *next;
348         drm_local_map_t *map, *mapsave;
349         int i;
350
351         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
352
353         DRM_DEBUG("\n");
354
355         if (dev->driver->lastclose != NULL)
356                 dev->driver->lastclose(dev);
357
358         if (dev->irq_enabled)
359                 drm_irq_uninstall(dev);
360
361         if (dev->unique) {
362                 free(dev->unique, DRM_MEM_DRIVER);
363                 dev->unique = NULL;
364                 dev->unique_len = 0;
365         }
366         /* Clear pid list */
367         for (i = 0; i < DRM_HASH_SIZE; i++) {
368                 for (pt = dev->magiclist[i].head; pt; pt = next) {
369                         next = pt->next;
370                         free(pt, DRM_MEM_MAGIC);
371                 }
372                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
373         }
374
375         DRM_UNLOCK();
376         drm_drawable_free_all(dev);
377         DRM_LOCK();
378
379         /* Clear AGP information */
380         if (dev->agp) {
381                 drm_agp_mem_t *entry;
382                 drm_agp_mem_t *nexte;
383
384                 /* Remove AGP resources, but leave dev->agp intact until
385                  * drm_unload is called.
386                  */
387                 for (entry = dev->agp->memory; entry; entry = nexte) {
388                         nexte = entry->next;
389                         if (entry->bound)
390                                 drm_agp_unbind_memory(entry->handle);
391                         drm_agp_free_memory(entry->handle);
392                         free(entry, DRM_MEM_AGPLISTS);
393                 }
394                 dev->agp->memory = NULL;
395
396                 if (dev->agp->acquired)
397                         drm_agp_release(dev);
398
399                 dev->agp->acquired = 0;
400                 dev->agp->enabled  = 0;
401         }
402         if (dev->sg != NULL) {
403                 drm_sg_cleanup(dev->sg);
404                 dev->sg = NULL;
405         }
406
407         TAILQ_FOREACH_MUTABLE(map, &dev->maplist, link, mapsave) {
408                 if (!(map->flags & _DRM_DRIVER))
409                         drm_rmmap(dev, map);
410         }
411
412         drm_dma_takedown(dev);
413         if (dev->lock.hw_lock) {
414                 dev->lock.hw_lock = NULL; /* SHM removed */
415                 dev->lock.file_priv = NULL;
416                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
417         }
418
419         return 0;
420 }
421
422 static int drm_load(struct drm_device *dev)
423 {
424         int i, retcode;
425
426         DRM_DEBUG("\n");
427
428         TAILQ_INIT(&dev->maplist);
429
430         drm_mem_init();
431         drm_sysctl_init(dev);
432         TAILQ_INIT(&dev->files);
433
434         dev->counters  = 6;
435         dev->types[0]  = _DRM_STAT_LOCK;
436         dev->types[1]  = _DRM_STAT_OPENS;
437         dev->types[2]  = _DRM_STAT_CLOSES;
438         dev->types[3]  = _DRM_STAT_IOCTLS;
439         dev->types[4]  = _DRM_STAT_LOCKS;
440         dev->types[5]  = _DRM_STAT_UNLOCKS;
441
442         for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
443                 atomic_set(&dev->counts[i], 0);
444
445         if (dev->driver->load != NULL) {
446                 DRM_LOCK();
447                 /* Shared code returns -errno. */
448                 retcode = -dev->driver->load(dev,
449                     dev->id_entry->driver_private);
450                 pci_enable_busmaster(dev->device);
451                 DRM_UNLOCK();
452                 if (retcode != 0)
453                         goto error;
454         }
455
456         if (drm_core_has_AGP(dev)) {
457                 if (drm_device_is_agp(dev))
458                         dev->agp = drm_agp_init();
459                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
460                     dev->agp == NULL) {
461                         DRM_ERROR("Card isn't AGP, or couldn't initialize "
462                             "AGP.\n");
463                         retcode = ENOMEM;
464                         goto error;
465                 }
466                 if (dev->agp != NULL) {
467                         if (drm_mtrr_add(dev->agp->info.ai_aperture_base,
468                             dev->agp->info.ai_aperture_size, DRM_MTRR_WC) == 0)
469                                 dev->agp->mtrr = 1;
470                 }
471         }
472
473         retcode = drm_ctxbitmap_init(dev);
474         if (retcode != 0) {
475                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
476                 goto error;
477         }
478
479         DRM_INFO("Initialized %s %d.%d.%d %s\n",
480             dev->driver->name,
481             dev->driver->major,
482             dev->driver->minor,
483             dev->driver->patchlevel,
484             dev->driver->date);
485
486         return 0;
487
488 error:
489         drm_sysctl_cleanup(dev);
490         DRM_LOCK();
491         drm_lastclose(dev);
492         DRM_UNLOCK();
493         destroy_dev(dev->devnode);
494
495         DRM_SPINUNINIT(&dev->drw_lock);
496         DRM_SPINUNINIT(&dev->vbl_lock);
497         DRM_SPINUNINIT(&dev->dev_lock);
498
499         return retcode;
500 }
501
502 static void drm_unload(struct drm_device *dev)
503 {
504         int i;
505
506         DRM_DEBUG("\n");
507
508         drm_sysctl_cleanup(dev);
509         destroy_dev(dev->devnode);
510
511         drm_ctxbitmap_cleanup(dev);
512
513         if (dev->agp && dev->agp->mtrr) {
514                 int __unused retcode;
515
516                 retcode = drm_mtrr_del(0, dev->agp->info.ai_aperture_base,
517                     dev->agp->info.ai_aperture_size, DRM_MTRR_WC);
518                 DRM_DEBUG("mtrr_del = %d", retcode);
519         }
520
521         drm_vblank_cleanup(dev);
522
523         DRM_LOCK();
524         drm_lastclose(dev);
525         DRM_UNLOCK();
526
527         /* Clean up PCI resources allocated by drm_bufs.c.  We're not really
528          * worried about resource consumption while the DRM is inactive (between
529          * lastclose and firstopen or unload) because these aren't actually
530          * taking up KVA, just keeping the PCI resource allocated.
531          */
532         for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
533                 if (dev->pcir[i] == NULL)
534                         continue;
535                 bus_release_resource(dev->device, SYS_RES_MEMORY,
536                     dev->pcirid[i], dev->pcir[i]);
537                 dev->pcir[i] = NULL;
538         }
539
540         if (dev->agp) {
541                 free(dev->agp, DRM_MEM_AGPLISTS);
542                 dev->agp = NULL;
543         }
544
545         if (dev->driver->unload != NULL) {
546                 DRM_LOCK();
547                 dev->driver->unload(dev);
548                 DRM_UNLOCK();
549         }
550
551         drm_mem_uninit();
552
553         pci_disable_busmaster(dev->device);
554
555         DRM_SPINUNINIT(&dev->drw_lock);
556         DRM_SPINUNINIT(&dev->vbl_lock);
557         DRM_SPINUNINIT(&dev->dev_lock);
558 }
559
560 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
561 {
562         struct drm_version *version = data;
563         int len;
564
565 #define DRM_COPY( name, value )                                         \
566         len = strlen( value );                                          \
567         if ( len > name##_len ) len = name##_len;                       \
568         name##_len = strlen( value );                                   \
569         if ( len && name ) {                                            \
570                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
571                         return EFAULT;                          \
572         }
573
574         version->version_major          = dev->driver->major;
575         version->version_minor          = dev->driver->minor;
576         version->version_patchlevel     = dev->driver->patchlevel;
577
578         DRM_COPY(version->name, dev->driver->name);
579         DRM_COPY(version->date, dev->driver->date);
580         DRM_COPY(version->desc, dev->driver->desc);
581
582         return 0;
583 }
584
585 int drm_open(struct dev_open_args *ap)
586 {
587         struct cdev *kdev = ap->a_head.a_dev;
588         int flags = ap->a_oflags;
589         int fmt = 0;
590         struct thread *p = curthread;
591         struct drm_device *dev = NULL;
592         int retcode = 0;
593
594         dev = DRIVER_SOFTC(minor(kdev));
595
596         DRM_DEBUG("open_count = %d\n", dev->open_count);
597
598         retcode = drm_open_helper(kdev, flags, fmt, p, dev);
599
600         if (!retcode) {
601                 atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
602                 DRM_LOCK();
603                 device_busy(dev->device);
604                 if (!dev->open_count++)
605                         retcode = drm_firstopen(dev);
606                 DRM_UNLOCK();
607         }
608
609         return retcode;
610 }
611
612 int drm_close(struct dev_close_args *ap)
613 {
614         struct cdev *kdev = ap->a_head.a_dev;
615         struct drm_file *file_priv;
616         struct drm_device *dev;
617         int retcode = 0;
618
619         dev = DRIVER_SOFTC(minor(kdev));
620         file_priv = drm_find_file_by_proc(dev, curthread);
621
622         DRM_DEBUG("open_count = %d\n", dev->open_count);
623
624         DRM_LOCK();
625
626         if (--file_priv->refs != 0)
627                 goto done;
628
629         if (dev->driver->preclose != NULL)
630                 dev->driver->preclose(dev, file_priv);
631
632         /* ========================================================
633          * Begin inline drm_release
634          */
635
636         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
637             DRM_CURRENTPID, (long)dev->device, dev->open_count);
638
639         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
640             && dev->lock.file_priv == file_priv) {
641                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
642                           DRM_CURRENTPID,
643                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
644                 if (dev->driver->reclaim_buffers_locked != NULL)
645                         dev->driver->reclaim_buffers_locked(dev, file_priv);
646
647                 drm_lock_free(&dev->lock,
648                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
649                 
650                                 /* FIXME: may require heavy-handed reset of
651                                    hardware at this point, possibly
652                                    processed via a callback to the X
653                                    server. */
654         } else if (dev->driver->reclaim_buffers_locked != NULL &&
655             dev->lock.hw_lock != NULL) {
656                 /* The lock is required to reclaim buffers */
657                 for (;;) {
658                         if (!dev->lock.hw_lock) {
659                                 /* Device has been unregistered */
660                                 retcode = EINTR;
661                                 break;
662                         }
663                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
664                                 dev->lock.file_priv = file_priv;
665                                 dev->lock.lock_time = jiffies;
666                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
667                                 break;  /* Got lock */
668                         }
669                         /* Contention */
670                         crit_enter();
671                         tsleep_interlock((void *)&dev->lock.lock_queue);
672                         DRM_UNLOCK();
673                         retcode = tsleep((void *)&dev->lock.lock_queue,
674                             PCATCH, "drmlk2", 0);
675                         crit_exit();
676                         DRM_LOCK();
677                         if (retcode)
678                                 break;
679                 }
680                 if (retcode == 0) {
681                         dev->driver->reclaim_buffers_locked(dev, file_priv);
682                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
683                 }
684         }
685
686         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
687             !dev->driver->reclaim_buffers_locked)
688                 drm_reclaim_buffers(dev, file_priv);
689
690         funsetown(dev->buf_sigio);
691
692         if (dev->driver->postclose != NULL)
693                 dev->driver->postclose(dev, file_priv);
694         TAILQ_REMOVE(&dev->files, file_priv, link);
695         free(file_priv, DRM_MEM_FILES);
696
697         /* ========================================================
698          * End inline drm_release
699          */
700 done:
701         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
702         device_unbusy(dev->device);
703         if (--dev->open_count == 0) {
704                 retcode = drm_lastclose(dev);
705         }
706
707         DRM_UNLOCK();
708
709         return (0);
710 }
711
712 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
713  */
714 int drm_ioctl(struct dev_ioctl_args *ap)
715 {
716         struct cdev *kdev = ap->a_head.a_dev;
717         u_long cmd = ap->a_cmd;
718         caddr_t data = ap->a_data;
719         struct thread *p = curthread;
720         struct drm_device *dev = drm_get_device_from_kdev(kdev);
721         int retcode = 0;
722         drm_ioctl_desc_t *ioctl;
723         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
724         int nr = DRM_IOCTL_NR(cmd);
725         int is_driver_ioctl = 0;
726         struct drm_file *file_priv;
727
728         file_priv = drm_find_file_by_proc(dev, p);
729         if (!file_priv) {
730                 DRM_ERROR("can't find authenticator\n");
731                 return EINVAL;
732         }
733
734         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
735         ++file_priv->ioctl_count;
736
737         DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
738             DRM_CURRENTPID, cmd, nr, (long)dev->device,
739             file_priv->authenticated);
740
741         switch (cmd) {
742         case FIONBIO:
743         case FIOASYNC:
744                 return 0;
745
746         case FIOSETOWN:
747                 return fsetown(*(int *)data, &dev->buf_sigio);
748
749         case FIOGETOWN:
750                 *(int *) data = fgetown(dev->buf_sigio);
751                 return 0;
752         }
753
754         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
755                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
756                 return EINVAL;
757         }
758
759         ioctl = &drm_ioctls[nr];
760         /* It's not a core DRM ioctl, try driver-specific. */
761         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
762                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
763                 nr -= DRM_COMMAND_BASE;
764                 if (nr > dev->driver->max_ioctl) {
765                         DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
766                             nr, dev->driver->max_ioctl);
767                         return EINVAL;
768                 }
769                 ioctl = &dev->driver->ioctls[nr];
770                 is_driver_ioctl = 1;
771         }
772         func = ioctl->func;
773
774         if (func == NULL) {
775                 DRM_DEBUG("no function\n");
776                 return EINVAL;
777         }
778
779         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
780             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
781             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
782                 return EACCES;
783
784         if (is_driver_ioctl) {
785                 DRM_LOCK();
786                 /* shared code returns -errno */
787                 retcode = -func(dev, data, file_priv);
788                 DRM_UNLOCK();
789         } else {
790                 retcode = func(dev, data, file_priv);
791         }
792
793         if (retcode != 0)
794                 DRM_DEBUG("    returning %d\n", retcode);
795
796         return retcode;
797 }
798
799 drm_local_map_t *drm_getsarea(struct drm_device *dev)
800 {
801         drm_local_map_t *map;
802
803         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
804         TAILQ_FOREACH(map, &dev->maplist, link) {
805                 if (map->type == _DRM_SHM && (map->flags & _DRM_CONTAINS_LOCK))
806                         return map;
807         }
808
809         return NULL;
810 }
811
812 #if DRM_LINUX
813
814 #include <sys/sysproto.h>
815
816 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
817
818 #define LINUX_IOCTL_DRM_MIN             0x6400
819 #define LINUX_IOCTL_DRM_MAX             0x64ff
820
821 static linux_ioctl_function_t drm_linux_ioctl;
822 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl, 
823     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
824
825 SYSINIT(drm_register, SI_SUB_KLD, SI_ORDER_MIDDLE, 
826     linux_ioctl_register_handler, &drm_handler);
827 SYSUNINIT(drm_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE, 
828     linux_ioctl_unregister_handler, &drm_handler);
829
830 /* The bits for in/out are switched on Linux */
831 #define LINUX_IOC_IN    IOC_OUT
832 #define LINUX_IOC_OUT   IOC_IN
833
834 static int
835 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
836 {
837         int error;
838         int cmd = args->cmd;
839
840         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
841         if (cmd & LINUX_IOC_IN)
842                 args->cmd |= IOC_IN;
843         if (cmd & LINUX_IOC_OUT)
844                 args->cmd |= IOC_OUT;
845         
846         error = ioctl(p, (struct ioctl_args *)args);
847
848         return error;
849 }
850 #endif /* DRM_LINUX */