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_cards_limit = 16; /* Enough for one machine */
40 unsigned int drm_debug = 0; /* 1 to enable debug output */
41 EXPORT_SYMBOL(drm_debug);
43 MODULE_AUTHOR(CORE_AUTHOR);
44 MODULE_DESCRIPTION(CORE_DESC);
45 MODULE_LICENSE("GPL and additional rights");
46 MODULE_PARM_DESC(cards_limit, "Maximum number of graphics cards");
47 MODULE_PARM_DESC(debug, "Enable debug output");
49 module_param_named(cards_limit, drm_cards_limit, int, 0444);
50 module_param_named(debug, drm_debug, int, 0600);
52 drm_head_t **drm_heads;
53 struct class *drm_class;
54 struct proc_dir_entry *drm_proc_root;
56 static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
57 const struct pci_device_id *ent,
58 struct drm_driver *driver)
62 spin_lock_init(&dev->count_lock);
63 spin_lock_init(&dev->drw_lock);
64 spin_lock_init(&dev->tasklet_lock);
65 spin_lock_init(&dev->lock.spinlock);
66 init_timer(&dev->timer);
67 mutex_init(&dev->struct_mutex);
68 mutex_init(&dev->ctxlist_mutex);
71 dev->pci_device = pdev->device;
72 dev->pci_vendor = pdev->vendor;
75 dev->hose = pdev->sysdata;
79 dev->maplist = drm_calloc(1, sizeof(*dev->maplist), DRM_MEM_MAPS);
80 if (dev->maplist == NULL)
82 INIT_LIST_HEAD(&dev->maplist->head);
83 if (drm_ht_create(&dev->map_hash, 12)) {
84 drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS);
88 /* the DRM has 6 basic counters */
90 dev->types[0] = _DRM_STAT_LOCK;
91 dev->types[1] = _DRM_STAT_OPENS;
92 dev->types[2] = _DRM_STAT_CLOSES;
93 dev->types[3] = _DRM_STAT_IOCTLS;
94 dev->types[4] = _DRM_STAT_LOCKS;
95 dev->types[5] = _DRM_STAT_UNLOCKS;
99 if (dev->driver->load)
100 if ((retcode = dev->driver->load(dev, ent->driver_data)))
101 goto error_out_unreg;
103 if (drm_core_has_AGP(dev)) {
104 if (drm_device_is_agp(dev))
105 dev->agp = drm_agp_init(dev);
106 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
107 && (dev->agp == NULL)) {
108 DRM_ERROR("Cannot initialize the agpgart module.\n");
110 goto error_out_unreg;
112 if (drm_core_has_MTRR(dev)) {
115 mtrr_add(dev->agp->agp_info.aper_base,
116 dev->agp->agp_info.aper_size *
117 1024 * 1024, MTRR_TYPE_WRCOMB, 1);
121 retcode = drm_ctxbitmap_init(dev);
123 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
124 goto error_out_unreg;
136 * Get a secondary minor number.
138 * \param dev device data structure
139 * \param sec-minor structure to hold the assigned minor
140 * \return negative number on failure.
142 * Search an empty entry and initialize it to the given parameters, and
143 * create the proc init entry via proc_init(). This routines assigns
144 * minor numbers to secondary heads of multi-headed cards
146 static int drm_get_head(drm_device_t * dev, drm_head_t * head)
148 drm_head_t **heads = drm_heads;
154 for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
157 *head = (drm_head_t) {
159 MKDEV(DRM_MAJOR, minor),.minor = minor,};
162 drm_proc_init(dev, minor, drm_proc_root,
165 "DRM: Failed to initialize /proc/dri.\n");
169 head->dev_class = drm_sysfs_device_add(drm_class, head);
170 if (IS_ERR(head->dev_class)) {
172 "DRM: Error sysfs_device_add.\n");
173 ret = PTR_ERR(head->dev_class);
178 DRM_DEBUG("new minor assigned %d\n", minor);
182 DRM_ERROR("out of minors\n");
185 drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
187 *head = (drm_head_t) {
195 * \param pdev - PCI device structure
196 * \param ent entry from the PCI ID table with device type flags
197 * \return zero on success or a negative number on failure.
199 * Attempt to gets inter module "drm" information. If we are first
200 * then register the character device and inter module information.
201 * Try and register, if we fail to register, backout previous work.
203 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
204 struct drm_driver *driver)
211 dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
215 ret = pci_enable_device(pdev);
219 if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
220 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
223 if ((ret = drm_get_head(dev, &dev->primary)))
226 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
227 driver->name, driver->major, driver->minor, driver->patchlevel,
228 driver->date, dev->primary.minor);
233 pci_disable_device(pdev);
235 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
240 * Put a device minor number.
242 * \param dev device data structure
243 * \return always zero
245 * Cleans up the proc resources. If it is the last minor then release the foreign
246 * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
247 * unregisters the character device.
249 int drm_put_dev(drm_device_t * dev)
251 DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
254 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
259 drm_free(dev->devname, strlen(dev->devname) + 1,
263 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
268 * Put a secondary minor number.
270 * \param sec_minor - structure to be released
271 * \return always zero
273 * Cleans up the proc resources. Not legal for this to be the
274 * last minor released.
277 int drm_put_head(drm_head_t * head)
279 int minor = head->minor;
281 DRM_DEBUG("release secondary minor %d\n", minor);
283 drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
284 drm_sysfs_device_remove(head->dev_class);
286 *head = (drm_head_t) {.dev = NULL};
288 drm_heads[minor] = NULL;