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 drm_sysfs_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 sema_init(&dev->struct_sem, 1);
65 sema_init(&dev->ctxlist_sem, 1);
70 dev->hose = pdev->sysdata;
71 dev->pci_domain = dev->hose->bus->number;
75 dev->pci_bus = pdev->bus->number;
76 dev->pci_slot = PCI_SLOT(pdev->devfn);
77 dev->pci_func = PCI_FUNC(pdev->devfn);
80 dev->maplist = drm_calloc(1, sizeof(*dev->maplist), DRM_MEM_MAPS);
81 if (dev->maplist == NULL)
83 INIT_LIST_HEAD(&dev->maplist->head);
85 /* the DRM has 6 basic counters */
87 dev->types[0] = _DRM_STAT_LOCK;
88 dev->types[1] = _DRM_STAT_OPENS;
89 dev->types[2] = _DRM_STAT_CLOSES;
90 dev->types[3] = _DRM_STAT_IOCTLS;
91 dev->types[4] = _DRM_STAT_LOCKS;
92 dev->types[5] = _DRM_STAT_UNLOCKS;
96 if (dev->driver->preinit)
97 if ((retcode = dev->driver->preinit(dev, ent->driver_data)))
100 if (drm_core_has_AGP(dev)) {
101 if (drm_device_is_agp(dev))
102 dev->agp = drm_agp_init(dev);
103 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
104 && (dev->agp == NULL)) {
105 DRM_ERROR("Cannot initialize the agpgart module.\n");
107 goto error_out_unreg;
109 if (drm_core_has_MTRR(dev)) {
112 mtrr_add(dev->agp->agp_info.aper_base,
113 dev->agp->agp_info.aper_size *
114 1024 * 1024, MTRR_TYPE_WRCOMB, 1);
118 retcode = drm_ctxbitmap_init(dev);
120 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
121 goto error_out_unreg;
132 * File \c open operation.
134 * \param inode device inode.
135 * \param filp file pointer.
137 * Puts the dev->fops corresponding to the device minor number into
138 * \p filp, call the \c open method, and restore the file operations.
140 int drm_stub_open(struct inode *inode, struct file *filp)
142 drm_device_t *dev = NULL;
143 int minor = iminor(inode);
145 struct file_operations *old_fops;
149 if (!((minor >= 0) && (minor < drm_cards_limit)))
152 if (!drm_heads[minor])
155 if (!(dev = drm_heads[minor]->dev))
158 old_fops = filp->f_op;
159 filp->f_op = fops_get(&dev->driver->fops);
160 if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) {
161 fops_put(filp->f_op);
162 filp->f_op = fops_get(old_fops);
170 * Get a secondary minor number.
172 * \param dev device data structure
173 * \param sec-minor structure to hold the assigned minor
174 * \return negative number on failure.
176 * Search an empty entry and initialize it to the given parameters, and
177 * create the proc init entry via proc_init(). This routines assigns
178 * minor numbers to secondary heads of multi-headed cards
180 static int drm_get_head(drm_device_t * dev, drm_head_t * head)
182 drm_head_t **heads = drm_heads;
188 for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
191 *head = (drm_head_t) {
193 MKDEV(DRM_MAJOR, minor),.minor = minor,};
196 drm_proc_init(dev, minor, drm_proc_root,
199 "DRM: Failed to initialize /proc/dri.\n");
203 head->dev_class = drm_sysfs_device_add(drm_class,
208 if (IS_ERR(head->dev_class)) {
210 "DRM: Error sysfs_device_add.\n");
211 ret = PTR_ERR(head->dev_class);
216 DRM_DEBUG("new minor assigned %d\n", minor);
220 DRM_ERROR("out of minors\n");
223 drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
225 *head = (drm_head_t) {
233 * \param pdev - PCI device structure
234 * \param ent entry from the PCI ID table with device type flags
235 * \return zero on success or a negative number on failure.
237 * Attempt to gets inter module "drm" information. If we are first
238 * then register the character device and inter module information.
239 * Try and register, if we fail to register, backout previous work.
241 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
242 struct drm_driver *driver)
249 dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
253 pci_enable_device(pdev);
255 if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
256 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
259 if ((ret = drm_get_head(dev, &dev->primary)))
262 /* postinit is a required function to display the signon banner */
263 /* drivers add secondary heads here if needed */
264 if ((ret = dev->driver->postinit(dev, ent->driver_data)))
270 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
274 EXPORT_SYMBOL(drm_get_dev);
277 * Put a device minor number.
279 * \param dev device data structure
280 * \return always zero
282 * Cleans up the proc resources. If it is the last minor then release the foreign
283 * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
284 * unregisters the character device.
286 int drm_put_dev(drm_device_t * dev)
288 DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
291 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
296 drm_free(dev->devname, strlen(dev->devname) + 1,
300 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
305 * Put a secondary minor number.
307 * \param sec_minor - structure to be released
308 * \return always zero
310 * Cleans up the proc resources. Not legal for this to be the
311 * last minor released.
314 int drm_put_head(drm_head_t * head)
316 int minor = head->minor;
318 DRM_DEBUG("release secondary minor %d\n", minor);
320 drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
321 drm_sysfs_device_remove(MKDEV(DRM_MAJOR, head->minor));
323 *head = (drm_head_t) {
326 drm_heads[minor] = NULL;