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, 0666);
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, const struct pci_device_id *ent, struct drm_driver *driver)
60 spin_lock_init(&dev->count_lock);
61 init_timer( &dev->timer );
62 sema_init( &dev->struct_sem, 1 );
63 sema_init( &dev->ctxlist_sem, 1 );
68 dev->hose = pdev->sysdata;
69 dev->pci_domain = dev->hose->bus->number;
73 dev->pci_bus = pdev->bus->number;
74 dev->pci_slot = PCI_SLOT(pdev->devfn);
75 dev->pci_func = PCI_FUNC(pdev->devfn);
78 dev->maplist = drm_calloc(1, sizeof(*dev->maplist), DRM_MEM_MAPS);
79 if (dev->maplist == NULL)
81 INIT_LIST_HEAD(&dev->maplist->head);
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->preinit)
95 if ((retcode = dev->driver->preinit(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) && (dev->agp == NULL)) {
102 DRM_ERROR( "Cannot initialize the agpgart module.\n" );
104 goto error_out_unreg;
106 if (drm_core_has_MTRR(dev)) {
108 dev->agp->agp_mtrr = mtrr_add( dev->agp->agp_info.aper_base,
109 dev->agp->agp_info.aper_size*1024*1024,
115 retcode = drm_ctxbitmap_init( dev );
117 DRM_ERROR( "Cannot allocate memory for context bitmap.\n" );
118 goto error_out_unreg;
129 * File \c open operation.
131 * \param inode device inode.
132 * \param filp file pointer.
134 * Puts the dev->fops corresponding to the device minor number into
135 * \p filp, call the \c open method, and restore the file operations.
137 int drm_stub_open(struct inode *inode, struct file *filp)
139 drm_device_t *dev = NULL;
140 int minor = iminor(inode);
142 struct file_operations *old_fops;
146 if (!((minor >= 0) && (minor < drm_cards_limit)))
149 if (!drm_heads[minor])
152 if (!(dev = drm_heads[minor]->dev))
155 old_fops = filp->f_op;
156 filp->f_op = fops_get(&dev->driver->fops);
157 if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) {
158 fops_put(filp->f_op);
159 filp->f_op = fops_get(old_fops);
167 * Get a secondary minor number.
169 * \param dev device data structure
170 * \param sec-minor structure to hold the assigned minor
171 * \return negative number on failure.
173 * Search an empty entry and initialize it to the given parameters, and
174 * create the proc init entry via proc_init(). This routines assigns
175 * minor numbers to secondary heads of multi-headed cards
177 static int drm_get_head(drm_device_t *dev, drm_head_t *head)
179 drm_head_t **heads = drm_heads;
185 for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
188 *head = (drm_head_t) {
190 .device = MKDEV(DRM_MAJOR, minor),
194 if ((ret = drm_proc_init(dev, minor, drm_proc_root, &head->dev_root))) {
195 printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n");
200 head->dev_class = drm_sysfs_device_add(drm_class,
205 if (IS_ERR(head->dev_class)) {
206 printk(KERN_ERR "DRM: Error sysfs_device_add.\n");
207 ret = PTR_ERR(head->dev_class);
212 DRM_DEBUG("new minor assigned %d\n", minor);
216 DRM_ERROR("out of minors\n");
219 drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
221 *head = (drm_head_t) {.dev = NULL};
228 * \param pdev - PCI device structure
229 * \param ent entry from the PCI ID table with device type flags
230 * \return zero on success or a negative number on failure.
232 * Attempt to gets inter module "drm" information. If we are first
233 * then register the character device and inter module information.
234 * Try and register, if we fail to register, backout previous work.
236 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
237 struct drm_driver *driver)
244 dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
248 pci_enable_device(pdev);
250 if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
251 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
254 if ((ret = drm_get_head(dev, &dev->primary)))
257 /* postinit is a required function to display the signon banner */
258 /* drivers add secondary heads here if needed */
259 if ((ret = dev->driver->postinit(dev, ent->driver_data)))
265 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
268 EXPORT_SYMBOL(drm_get_dev);
271 * Put a device minor number.
273 * \param dev device data structure
274 * \return always zero
276 * Cleans up the proc resources. If it is the last minor then release the foreign
277 * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
278 * unregisters the character device.
280 int drm_put_dev(drm_device_t * dev)
282 DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
285 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
290 drm_free(dev->devname, strlen(dev->devname) + 1,
294 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
299 * Put a secondary minor number.
301 * \param sec_minor - structure to be released
302 * \return always zero
304 * Cleans up the proc resources. Not legal for this to be the
305 * last minor released.
308 int drm_put_head(drm_head_t *head)
310 int minor = head->minor;
312 DRM_DEBUG("release secondary minor %d\n", minor);
314 drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
315 drm_sysfs_device_remove(MKDEV(DRM_MAJOR, head->minor));
317 *head = (drm_head_t){.dev = NULL};
319 drm_heads[minor] = NULL;