5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
9 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
11 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
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:
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
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.
34 #include <linux/module.h>
35 #include <linux/moduleparam.h>
39 unsigned int drm_debug = 0; /* 1 to enable debug output */
40 EXPORT_SYMBOL(drm_debug);
42 MODULE_AUTHOR(CORE_AUTHOR);
43 MODULE_DESCRIPTION(CORE_DESC);
44 MODULE_LICENSE("GPL and additional rights");
45 MODULE_PARM_DESC(debug, "Enable debug output");
47 module_param_named(debug, drm_debug, int, 0600);
49 struct idr drm_minors_idr;
51 struct class *drm_class;
52 struct proc_dir_entry *drm_proc_root;
54 static int drm_minor_get_id(struct drm_device *dev, int type)
58 int base = 0, limit = 63;
61 if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
62 DRM_ERROR("Out of memory expanding drawable idr\n");
65 mutex_lock(&dev->struct_mutex);
66 ret = idr_get_new_above(&drm_minors_idr, NULL,
68 mutex_unlock(&dev->struct_mutex);
75 if (new_id >= limit) {
76 idr_remove(&drm_minors_idr, new_id);
82 struct drm_master *drm_master_create(struct drm_minor *minor)
84 struct drm_master *master;
86 master = drm_calloc(1, sizeof(*master), DRM_MEM_DRIVER);
90 kref_init(&master->refcount);
91 spin_lock_init(&master->lock.spinlock);
92 init_waitqueue_head(&master->lock.lock_queue);
93 drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
94 INIT_LIST_HEAD(&master->magicfree);
95 master->minor = minor;
97 list_add_tail(&master->head, &minor->master_list);
102 struct drm_master *drm_master_get(struct drm_master *master)
104 kref_get(&master->refcount);
108 static void drm_master_destroy(struct kref *kref)
110 struct drm_master *master = container_of(kref, struct drm_master, refcount);
111 struct drm_magic_entry *pt, *next;
112 struct drm_device *dev = master->minor->dev;
114 list_del(&master->head);
116 if (dev->driver->master_destroy)
117 dev->driver->master_destroy(dev, master);
119 if (master->unique) {
120 drm_free(master->unique, master->unique_size, DRM_MEM_DRIVER);
121 master->unique = NULL;
122 master->unique_len = 0;
125 list_for_each_entry_safe(pt, next, &master->magicfree, head) {
127 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
128 drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
131 drm_ht_remove(&master->magiclist);
133 if (master->lock.hw_lock) {
134 if (dev->sigdata.lock == master->lock.hw_lock)
135 dev->sigdata.lock = NULL;
136 master->lock.hw_lock = NULL;
137 master->lock.file_priv = NULL;
138 wake_up_interruptible(&master->lock.lock_queue);
141 drm_free(master, sizeof(*master), DRM_MEM_DRIVER);
144 void drm_master_put(struct drm_master **master)
146 kref_put(&(*master)->refcount, drm_master_destroy);
150 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
151 struct drm_file *file_priv)
153 if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
156 if (!file_priv->master)
159 if (!file_priv->minor->master &&
160 file_priv->minor->master != file_priv->master) {
161 mutex_lock(&dev->struct_mutex);
162 file_priv->minor->master = drm_master_get(file_priv->master);
163 mutex_lock(&dev->struct_mutex);
169 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
170 struct drm_file *file_priv)
172 if (!file_priv->master)
174 mutex_lock(&dev->struct_mutex);
175 drm_master_put(&file_priv->minor->master);
176 mutex_unlock(&dev->struct_mutex);
180 static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
181 const struct pci_device_id *ent,
182 struct drm_driver *driver)
186 INIT_LIST_HEAD(&dev->filelist);
187 INIT_LIST_HEAD(&dev->ctxlist);
188 INIT_LIST_HEAD(&dev->vmalist);
189 INIT_LIST_HEAD(&dev->maplist);
191 spin_lock_init(&dev->count_lock);
192 spin_lock_init(&dev->drw_lock);
193 init_timer(&dev->timer);
194 mutex_init(&dev->struct_mutex);
195 mutex_init(&dev->ctxlist_mutex);
197 idr_init(&dev->drw_idr);
200 dev->pci_device = pdev->device;
201 dev->pci_vendor = pdev->vendor;
204 dev->hose = pdev->sysdata;
207 if (drm_ht_create(&dev->map_hash, 12)) {
211 /* the DRM has 6 basic counters */
213 dev->types[0] = _DRM_STAT_LOCK;
214 dev->types[1] = _DRM_STAT_OPENS;
215 dev->types[2] = _DRM_STAT_CLOSES;
216 dev->types[3] = _DRM_STAT_IOCTLS;
217 dev->types[4] = _DRM_STAT_LOCKS;
218 dev->types[5] = _DRM_STAT_UNLOCKS;
220 dev->driver = driver;
222 if (drm_core_has_AGP(dev)) {
223 if (drm_device_is_agp(dev))
224 dev->agp = drm_agp_init(dev);
225 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
226 && (dev->agp == NULL)) {
227 DRM_ERROR("Cannot initialize the agpgart module.\n");
229 goto error_out_unreg;
231 if (drm_core_has_MTRR(dev)) {
234 mtrr_add(dev->agp->agp_info.aper_base,
235 dev->agp->agp_info.aper_size *
236 1024 * 1024, MTRR_TYPE_WRCOMB, 1);
240 if (dev->driver->load)
241 if ((retcode = dev->driver->load(dev, ent->driver_data)))
242 goto error_out_unreg;
244 retcode = drm_ctxbitmap_init(dev);
246 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
247 goto error_out_unreg;
250 if (driver->driver_features & DRIVER_GEM) {
251 retcode = drm_gem_init(dev);
253 DRM_ERROR("Cannot initialize graphics execution "
255 goto error_out_unreg;
268 * Get a secondary minor number.
270 * \param dev device data structure
271 * \param sec-minor structure to hold the assigned minor
272 * \return negative number on failure.
274 * Search an empty entry and initialize it to the given parameters, and
275 * create the proc init entry via proc_init(). This routines assigns
276 * minor numbers to secondary heads of multi-headed cards
278 static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
280 struct drm_minor *new_minor;
286 minor_id = drm_minor_get_id(dev, type);
290 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
296 new_minor->type = type;
297 new_minor->device = MKDEV(DRM_MAJOR, minor_id);
298 new_minor->dev = dev;
299 new_minor->index = minor_id;
300 INIT_LIST_HEAD(&new_minor->master_list);
302 idr_replace(&drm_minors_idr, new_minor, minor_id);
304 if (type == DRM_MINOR_LEGACY) {
305 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
307 DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
311 new_minor->dev_root = NULL;
313 ret = drm_sysfs_device_add(new_minor);
316 "DRM: Error sysfs_device_add.\n");
321 DRM_DEBUG("new minor assigned %d\n", minor_id);
326 if (new_minor->type == DRM_MINOR_LEGACY)
327 drm_proc_cleanup(new_minor, drm_proc_root);
331 idr_remove(&drm_minors_idr, minor_id);
339 * \param pdev - PCI device structure
340 * \param ent entry from the PCI ID table with device type flags
341 * \return zero on success or a negative number on failure.
343 * Attempt to gets inter module "drm" information. If we are first
344 * then register the character device and inter module information.
345 * Try and register, if we fail to register, backout previous work.
347 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
348 struct drm_driver *driver)
350 struct drm_device *dev;
355 dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
359 ret = pci_enable_device(pdev);
363 pci_set_master(pdev);
364 if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
365 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
368 if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
371 list_add_tail(&dev->driver_item, &driver->device_list);
373 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
374 driver->name, driver->major, driver->minor, driver->patchlevel,
375 driver->date, dev->primary->index);
380 pci_disable_device(pdev);
382 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
387 * Put a device minor number.
389 * \param dev device data structure
390 * \return always zero
392 * Cleans up the proc resources. If it is the last minor then release the foreign
393 * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
394 * unregisters the character device.
396 int drm_put_dev(struct drm_device * dev)
398 DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
401 drm_free(dev->devname, strlen(dev->devname) + 1,
405 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
410 * Put a secondary minor number.
412 * \param sec_minor - structure to be released
413 * \return always zero
415 * Cleans up the proc resources. Not legal for this to be the
416 * last minor released.
419 int drm_put_minor(struct drm_minor **minor_p)
421 struct drm_minor *minor = *minor_p;
423 DRM_DEBUG("release secondary minor %d\n", minor->index);
425 if (minor->type == DRM_MINOR_LEGACY)
426 drm_proc_cleanup(minor, drm_proc_root);
427 drm_sysfs_device_remove(minor);
429 idr_remove(&drm_minors_idr, minor->index);