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 init_timer(&dev->timer);
64 mutex_init(&dev->struct_mutex);
65 mutex_init(&dev->ctxlist_mutex);
70 dev->hose = pdev->sysdata;
74 dev->maplist = drm_calloc(1, sizeof(*dev->maplist), DRM_MEM_MAPS);
75 if (dev->maplist == NULL)
77 INIT_LIST_HEAD(&dev->maplist->head);
78 if (drm_ht_create(&dev->map_hash, 12)) {
79 drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS);
83 /* the DRM has 6 basic counters */
85 dev->types[0] = _DRM_STAT_LOCK;
86 dev->types[1] = _DRM_STAT_OPENS;
87 dev->types[2] = _DRM_STAT_CLOSES;
88 dev->types[3] = _DRM_STAT_IOCTLS;
89 dev->types[4] = _DRM_STAT_LOCKS;
90 dev->types[5] = _DRM_STAT_UNLOCKS;
94 if (dev->driver->load)
95 if ((retcode = dev->driver->load(dev, ent->driver_data)))
98 if (drm_core_has_AGP(dev)) {
99 if (drm_device_is_agp(dev))
100 dev->agp = drm_agp_init(dev);
101 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
102 && (dev->agp == NULL)) {
103 DRM_ERROR("Cannot initialize the agpgart module.\n");
105 goto error_out_unreg;
107 if (drm_core_has_MTRR(dev)) {
110 mtrr_add(dev->agp->agp_info.aper_base,
111 dev->agp->agp_info.aper_size *
112 1024 * 1024, MTRR_TYPE_WRCOMB, 1);
116 retcode = drm_ctxbitmap_init(dev);
118 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
119 goto error_out_unreg;
131 * Get a secondary minor number.
133 * \param dev device data structure
134 * \param sec-minor structure to hold the assigned minor
135 * \return negative number on failure.
137 * Search an empty entry and initialize it to the given parameters, and
138 * create the proc init entry via proc_init(). This routines assigns
139 * minor numbers to secondary heads of multi-headed cards
141 static int drm_get_head(drm_device_t * dev, drm_head_t * head)
143 drm_head_t **heads = drm_heads;
149 for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
152 *head = (drm_head_t) {
154 MKDEV(DRM_MAJOR, minor),.minor = minor,};
157 drm_proc_init(dev, minor, drm_proc_root,
160 "DRM: Failed to initialize /proc/dri.\n");
164 head->dev_class = drm_sysfs_device_add(drm_class, head);
165 if (IS_ERR(head->dev_class)) {
167 "DRM: Error sysfs_device_add.\n");
168 ret = PTR_ERR(head->dev_class);
173 DRM_DEBUG("new minor assigned %d\n", minor);
177 DRM_ERROR("out of minors\n");
180 drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
182 *head = (drm_head_t) {
190 * \param pdev - PCI device structure
191 * \param ent entry from the PCI ID table with device type flags
192 * \return zero on success or a negative number on failure.
194 * Attempt to gets inter module "drm" information. If we are first
195 * then register the character device and inter module information.
196 * Try and register, if we fail to register, backout previous work.
198 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
199 struct drm_driver *driver)
206 dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
210 pci_enable_device(pdev);
212 if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
213 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
216 if ((ret = drm_get_head(dev, &dev->primary)))
219 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
220 driver->name, driver->major, driver->minor, driver->patchlevel,
221 driver->date, dev->primary.minor);
226 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
231 * Put a device minor number.
233 * \param dev device data structure
234 * \return always zero
236 * Cleans up the proc resources. If it is the last minor then release the foreign
237 * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
238 * unregisters the character device.
240 int drm_put_dev(drm_device_t * dev)
242 DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
245 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
250 drm_free(dev->devname, strlen(dev->devname) + 1,
254 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
259 * Put a secondary minor number.
261 * \param sec_minor - structure to be released
262 * \return always zero
264 * Cleans up the proc resources. Not legal for this to be the
265 * last minor released.
268 int drm_put_head(drm_head_t * head)
270 int minor = head->minor;
272 DRM_DEBUG("release secondary minor %d\n", minor);
274 drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
275 drm_sysfs_device_remove(head->dev_class);
277 *head = (drm_head_t) {.dev = NULL};
279 drm_heads[minor] = NULL;