drm_stub.c revision 288653 
1/**
2 * \file drm_stub.h
3 * Stub support
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 */
7
8/*
9 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
10 *
11 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a
15 * copy of this software and associated documentation files (the "Software"),
16 * to deal in the Software without restriction, including without limitation
17 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
18 * and/or sell copies of the Software, and to permit persons to whom the
19 * Software is furnished to do so, subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice (including the next
22 * paragraph) shall be included in all copies or substantial portions of the
23 * Software.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
28 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
29 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
30 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
31 * DEALINGS IN THE SOFTWARE.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: head/sys/dev/drm2/drm_stub.c 288653 2015-10-04 07:45:36Z adrian $");
36
37#include <dev/drm2/drmP.h>
38#include <dev/drm2/drm_core.h>
39
40#ifdef DRM_DEBUG_DEFAULT_ON
41unsigned int drm_debug = (DRM_DEBUGBITS_DEBUG | DRM_DEBUGBITS_KMS |
42    DRM_DEBUGBITS_FAILED_IOCTL);
43#else
44unsigned int drm_debug = 0;	/* 1 to enable debug output */
45#endif
46EXPORT_SYMBOL(drm_debug);
47
48unsigned int drm_notyet = 0;
49
50unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */
51EXPORT_SYMBOL(drm_vblank_offdelay);
52
53unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */
54EXPORT_SYMBOL(drm_timestamp_precision);
55
56/*
57 * Default to use monotonic timestamps for wait-for-vblank and page-flip
58 * complete events.
59 */
60unsigned int drm_timestamp_monotonic = 1;
61
62MODULE_AUTHOR(CORE_AUTHOR);
63MODULE_DESCRIPTION(CORE_DESC);
64MODULE_LICENSE("GPL and additional rights");
65MODULE_PARM_DESC(debug, "Enable debug output");
66MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
67MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
68MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps");
69
70module_param_named(debug, drm_debug, int, 0600);
71module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
72module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
73module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);
74
75static struct cdevsw drm_cdevsw = {
76	.d_version =	D_VERSION,
77	.d_open =	drm_open,
78	.d_read =	drm_read,
79	.d_ioctl =	drm_ioctl,
80	.d_poll =	drm_poll,
81	.d_mmap_single = drm_mmap_single,
82	.d_name =	"drm",
83	.d_flags =	D_TRACKCLOSE
84};
85
86static int drm_minor_get_id(struct drm_device *dev, int type)
87{
88	int new_id;
89
90	new_id = device_get_unit(dev->dev);
91
92	if (new_id >= 64)
93		return -EINVAL;
94
95	if (type == DRM_MINOR_CONTROL) {
96		new_id += 64;
97	} else if (type == DRM_MINOR_RENDER) {
98		new_id += 128;
99	}
100
101	return new_id;
102}
103
104struct drm_master *drm_master_create(struct drm_minor *minor)
105{
106	struct drm_master *master;
107
108	master = malloc(sizeof(*master), DRM_MEM_KMS, M_NOWAIT | M_ZERO);
109	if (!master)
110		return NULL;
111
112	refcount_init(&master->refcount, 1);
113	mtx_init(&master->lock.spinlock, "drm_master__lock__spinlock",
114	    NULL, MTX_DEF);
115	DRM_INIT_WAITQUEUE(&master->lock.lock_queue);
116	drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
117	INIT_LIST_HEAD(&master->magicfree);
118	master->minor = minor;
119
120	list_add_tail(&master->head, &minor->master_list);
121
122	return master;
123}
124
125struct drm_master *drm_master_get(struct drm_master *master)
126{
127	refcount_acquire(&master->refcount);
128	return master;
129}
130EXPORT_SYMBOL(drm_master_get);
131
132static void drm_master_destroy(struct drm_master *master)
133{
134	struct drm_magic_entry *pt, *next;
135	struct drm_device *dev = master->minor->dev;
136	struct drm_map_list *r_list, *list_temp;
137
138	list_del(&master->head);
139
140	if (dev->driver->master_destroy)
141		dev->driver->master_destroy(dev, master);
142
143	list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
144		if (r_list->master == master) {
145			drm_rmmap_locked(dev, r_list->map);
146			r_list = NULL;
147		}
148	}
149
150	if (master->unique) {
151		free(master->unique, DRM_MEM_DRIVER);
152		master->unique = NULL;
153		master->unique_len = 0;
154	}
155
156	list_for_each_entry_safe(pt, next, &master->magicfree, head) {
157		list_del(&pt->head);
158		drm_ht_remove_item(&master->magiclist, &pt->hash_item);
159		free(pt, DRM_MEM_MAGIC);
160	}
161
162	drm_ht_remove(&master->magiclist);
163
164	free(master, DRM_MEM_KMS);
165}
166
167void drm_master_put(struct drm_master **master)
168{
169	if (refcount_release(&(*master)->refcount))
170		drm_master_destroy(*master);
171	*master = NULL;
172}
173EXPORT_SYMBOL(drm_master_put);
174
175int drm_setmaster_ioctl(struct drm_device *dev, void *data,
176			struct drm_file *file_priv)
177{
178	int ret;
179
180	if (file_priv->is_master)
181		return 0;
182
183	if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
184		return -EINVAL;
185
186	if (!file_priv->master)
187		return -EINVAL;
188
189	if (file_priv->minor->master)
190		return -EINVAL;
191
192	DRM_LOCK(dev);
193	file_priv->minor->master = drm_master_get(file_priv->master);
194	file_priv->is_master = 1;
195	if (dev->driver->master_set) {
196		ret = dev->driver->master_set(dev, file_priv, false);
197		if (unlikely(ret != 0)) {
198			file_priv->is_master = 0;
199			drm_master_put(&file_priv->minor->master);
200		}
201	}
202	DRM_UNLOCK(dev);
203
204	return 0;
205}
206
207int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
208			 struct drm_file *file_priv)
209{
210	if (!file_priv->is_master)
211		return -EINVAL;
212
213	if (!file_priv->minor->master)
214		return -EINVAL;
215
216	DRM_LOCK(dev);
217	if (dev->driver->master_drop)
218		dev->driver->master_drop(dev, file_priv, false);
219	drm_master_put(&file_priv->minor->master);
220	file_priv->is_master = 0;
221	DRM_UNLOCK(dev);
222	return 0;
223}
224
225int drm_fill_in_dev(struct drm_device *dev,
226			   struct drm_driver *driver)
227{
228	int retcode, i;
229
230	INIT_LIST_HEAD(&dev->filelist);
231	INIT_LIST_HEAD(&dev->ctxlist);
232	INIT_LIST_HEAD(&dev->maplist);
233	INIT_LIST_HEAD(&dev->vblank_event_list);
234
235	mtx_init(&dev->irq_lock, "drmirq", NULL, MTX_DEF);
236	mtx_init(&dev->count_lock, "drmcount", NULL, MTX_DEF);
237	mtx_init(&dev->event_lock, "drmev", NULL, MTX_DEF);
238	sx_init(&dev->dev_struct_lock, "drmslk");
239	mtx_init(&dev->ctxlist_mutex, "drmctxlist", NULL, MTX_DEF);
240	mtx_init(&dev->pcir_lock, "drmpcir", NULL, MTX_DEF);
241
242	if (drm_ht_create(&dev->map_hash, 12)) {
243		return -ENOMEM;
244	}
245
246	/* the DRM has 6 basic counters */
247	dev->counters = 6;
248	dev->types[0] = _DRM_STAT_LOCK;
249	dev->types[1] = _DRM_STAT_OPENS;
250	dev->types[2] = _DRM_STAT_CLOSES;
251	dev->types[3] = _DRM_STAT_IOCTLS;
252	dev->types[4] = _DRM_STAT_LOCKS;
253	dev->types[5] = _DRM_STAT_UNLOCKS;
254
255	/*
256	 * FIXME Linux<->FreeBSD: this is done in drm_setup() on Linux.
257	 */
258	for (i = 0; i < ARRAY_SIZE(dev->counts); i++)
259		atomic_set(&dev->counts[i], 0);
260
261	dev->driver = driver;
262
263	retcode = drm_pci_agp_init(dev);
264	if (retcode)
265		goto error_out_unreg;
266
267
268
269	retcode = drm_ctxbitmap_init(dev);
270	if (retcode) {
271		DRM_ERROR("Cannot allocate memory for context bitmap.\n");
272		goto error_out_unreg;
273	}
274
275	if (driver->driver_features & DRIVER_GEM) {
276		retcode = drm_gem_init(dev);
277		if (retcode) {
278			DRM_ERROR("Cannot initialize graphics execution "
279				  "manager (GEM)\n");
280			goto error_out_unreg;
281		}
282	}
283
284	retcode = drm_sysctl_init(dev);
285	if (retcode != 0) {
286		DRM_ERROR("Failed to create hw.dri sysctl entry: %d\n",
287		    retcode);
288	}
289
290	return 0;
291
292      error_out_unreg:
293	drm_cancel_fill_in_dev(dev);
294	return retcode;
295}
296EXPORT_SYMBOL(drm_fill_in_dev);
297
298void drm_cancel_fill_in_dev(struct drm_device *dev)
299{
300	struct drm_driver *driver;
301
302	driver = dev->driver;
303
304	drm_sysctl_cleanup(dev);
305	if (driver->driver_features & DRIVER_GEM)
306		drm_gem_destroy(dev);
307	drm_ctxbitmap_cleanup(dev);
308
309	if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
310	    dev->agp && dev->agp->agp_mtrr >= 0) {
311		int retval;
312		retval = drm_mtrr_del(dev->agp->agp_mtrr,
313				  dev->agp->agp_info.ai_aperture_base,
314				  dev->agp->agp_info.ai_aperture_size,
315				  DRM_MTRR_WC);
316		DRM_DEBUG("mtrr_del=%d\n", retval);
317	}
318	free(dev->agp, DRM_MEM_AGPLISTS);
319	dev->agp = NULL;
320
321	drm_ht_remove(&dev->map_hash);
322
323	mtx_destroy(&dev->irq_lock);
324	mtx_destroy(&dev->count_lock);
325	mtx_destroy(&dev->event_lock);
326	sx_destroy(&dev->dev_struct_lock);
327	mtx_destroy(&dev->ctxlist_mutex);
328	mtx_destroy(&dev->pcir_lock);
329}
330
331/**
332 * Get a secondary minor number.
333 *
334 * \param dev device data structure
335 * \param sec-minor structure to hold the assigned minor
336 * \return negative number on failure.
337 *
338 * Search an empty entry and initialize it to the given parameters, and
339 * create the proc init entry via proc_init(). This routines assigns
340 * minor numbers to secondary heads of multi-headed cards
341 */
342int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
343{
344	struct drm_minor *new_minor;
345	int ret;
346	int minor_id;
347	const char *minor_devname;
348
349	DRM_DEBUG("\n");
350
351	minor_id = drm_minor_get_id(dev, type);
352	if (minor_id < 0)
353		return minor_id;
354
355	new_minor = malloc(sizeof(struct drm_minor), DRM_MEM_MINOR,
356	    M_NOWAIT | M_ZERO);
357	if (!new_minor) {
358		ret = -ENOMEM;
359		goto err_idr;
360	}
361
362	new_minor->type = type;
363	new_minor->dev = dev;
364	new_minor->index = minor_id;
365	INIT_LIST_HEAD(&new_minor->master_list);
366
367	new_minor->buf_sigio = NULL;
368
369	switch (type) {
370	case DRM_MINOR_CONTROL:
371		minor_devname = "dri/controlD%d";
372		break;
373	case DRM_MINOR_RENDER:
374		minor_devname = "dri/renderD%d";
375		break;
376	default:
377		minor_devname = "dri/card%d";
378		break;
379	}
380
381	ret = make_dev_p(MAKEDEV_WAITOK | MAKEDEV_CHECKNAME, &new_minor->device,
382	    &drm_cdevsw, 0, DRM_DEV_UID, DRM_DEV_GID,
383	    DRM_DEV_MODE, minor_devname, minor_id);
384	if (ret) {
385		DRM_ERROR("Failed to create cdev: %d\n", ret);
386		goto err_mem;
387	}
388	new_minor->device->si_drv1 = new_minor;
389	*minor = new_minor;
390
391	DRM_DEBUG("new minor assigned %d\n", minor_id);
392	return 0;
393
394
395err_mem:
396	free(new_minor, DRM_MEM_MINOR);
397err_idr:
398	*minor = NULL;
399	return ret;
400}
401EXPORT_SYMBOL(drm_get_minor);
402
403/**
404 * Put a secondary minor number.
405 *
406 * \param sec_minor - structure to be released
407 * \return always zero
408 *
409 * Cleans up the proc resources. Not legal for this to be the
410 * last minor released.
411 *
412 */
413int drm_put_minor(struct drm_minor **minor_p)
414{
415	struct drm_minor *minor = *minor_p;
416
417	DRM_DEBUG("release secondary minor %d\n", minor->index);
418
419	funsetown(&minor->buf_sigio);
420
421	destroy_dev(minor->device);
422
423	free(minor, DRM_MEM_MINOR);
424	*minor_p = NULL;
425	return 0;
426}
427EXPORT_SYMBOL(drm_put_minor);
428
429/**
430 * Called via drm_exit() at module unload time or when pci device is
431 * unplugged.
432 *
433 * Cleans up all DRM device, calling drm_lastclose().
434 *
435 */
436void drm_put_dev(struct drm_device *dev)
437{
438	struct drm_driver *driver;
439	struct drm_map_list *r_list, *list_temp;
440
441	DRM_DEBUG("\n");
442
443	if (!dev) {
444		DRM_ERROR("cleanup called no dev\n");
445		return;
446	}
447	driver = dev->driver;
448
449	drm_lastclose(dev);
450
451	if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
452	    dev->agp && dev->agp->agp_mtrr >= 0) {
453		int retval;
454		retval = drm_mtrr_del(dev->agp->agp_mtrr,
455				  dev->agp->agp_info.ai_aperture_base,
456				  dev->agp->agp_info.ai_aperture_size,
457				  DRM_MTRR_WC);
458		DRM_DEBUG("mtrr_del=%d\n", retval);
459	}
460
461	if (drm_core_check_feature(dev, DRIVER_MODESET))
462		drm_mode_group_free(&dev->primary->mode_group);
463
464	if (dev->driver->unload)
465		dev->driver->unload(dev);
466
467	drm_sysctl_cleanup(dev);
468
469	if (drm_core_has_AGP(dev) && dev->agp) {
470		free(dev->agp, DRM_MEM_AGPLISTS);
471		dev->agp = NULL;
472	}
473
474	drm_vblank_cleanup(dev);
475
476	list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
477		drm_rmmap(dev, r_list->map);
478	drm_ht_remove(&dev->map_hash);
479
480	drm_ctxbitmap_cleanup(dev);
481
482	if (drm_core_check_feature(dev, DRIVER_MODESET))
483		drm_put_minor(&dev->control);
484
485	if (driver->driver_features & DRIVER_GEM)
486		drm_gem_destroy(dev);
487
488	drm_put_minor(&dev->primary);
489
490	mtx_destroy(&dev->irq_lock);
491	mtx_destroy(&dev->count_lock);
492	mtx_destroy(&dev->event_lock);
493	sx_destroy(&dev->dev_struct_lock);
494	mtx_destroy(&dev->ctxlist_mutex);
495	mtx_destroy(&dev->pcir_lock);
496
497#ifdef FREEBSD_NOTYET
498	list_del(&dev->driver_item);
499#endif /* FREEBSD_NOTYET */
500}
501EXPORT_SYMBOL(drm_put_dev);
502