blob: 48829a1a086a94cba10327d6896f8e1dbfdc5e95 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
2 * \file drm_stub.h
3 * Stub support
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 */
7
8/*
9 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
10 *
11 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
13 *
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:
20 *
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
23 * Software.
24 *
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.
32 */
33
34#include <linux/module.h>
35#include <linux/moduleparam.h>
36#include "drmP.h"
37#include "drm_core.h"
38
39unsigned int drm_cards_limit = 16; /* Enough for one machine */
40unsigned int drm_debug = 0; /* 1 to enable debug output */
41EXPORT_SYMBOL(drm_debug);
42
43MODULE_AUTHOR( CORE_AUTHOR );
44MODULE_DESCRIPTION( CORE_DESC );
45MODULE_LICENSE("GPL and additional rights");
46MODULE_PARM_DESC(cards_limit, "Maximum number of graphics cards");
47MODULE_PARM_DESC(debug, "Enable debug output");
48
49module_param_named(cards_limit, drm_cards_limit, int, 0444);
50module_param_named(debug, drm_debug, int, 0666);
51
52drm_head_t **drm_heads;
53struct drm_sysfs_class *drm_class;
54struct proc_dir_entry *drm_proc_root;
55
56static int drm_fill_in_dev(drm_device_t *dev, struct pci_dev *pdev, const struct pci_device_id *ent, struct drm_driver *driver)
57{
58 int retcode;
59
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 );
64
65 dev->pdev = pdev;
66
67#ifdef __alpha__
68 dev->hose = pdev->sysdata;
69 dev->pci_domain = dev->hose->bus->number;
70#else
71 dev->pci_domain = 0;
72#endif
73 dev->pci_bus = pdev->bus->number;
74 dev->pci_slot = PCI_SLOT(pdev->devfn);
75 dev->pci_func = PCI_FUNC(pdev->devfn);
76 dev->irq = pdev->irq;
77
78 /* the DRM has 6 basic counters */
79 dev->counters = 6;
80 dev->types[0] = _DRM_STAT_LOCK;
81 dev->types[1] = _DRM_STAT_OPENS;
82 dev->types[2] = _DRM_STAT_CLOSES;
83 dev->types[3] = _DRM_STAT_IOCTLS;
84 dev->types[4] = _DRM_STAT_LOCKS;
85 dev->types[5] = _DRM_STAT_UNLOCKS;
86
87 dev->driver = driver;
88
89 if (dev->driver->preinit)
90 if ((retcode = dev->driver->preinit(dev, ent->driver_data)))
91 goto error_out_unreg;
92
93 if (drm_core_has_AGP(dev)) {
94 dev->agp = drm_agp_init(dev);
95 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) && (dev->agp == NULL)) {
96 DRM_ERROR( "Cannot initialize the agpgart module.\n" );
97 retcode = -EINVAL;
98 goto error_out_unreg;
99 }
100 if (drm_core_has_MTRR(dev)) {
101 if (dev->agp)
102 dev->agp->agp_mtrr = mtrr_add( dev->agp->agp_info.aper_base,
103 dev->agp->agp_info.aper_size*1024*1024,
104 MTRR_TYPE_WRCOMB,
105 1 );
106 }
107 }
108
109 retcode = drm_ctxbitmap_init( dev );
110 if( retcode ) {
111 DRM_ERROR( "Cannot allocate memory for context bitmap.\n" );
112 goto error_out_unreg;
113 }
114
115 return 0;
116
117error_out_unreg:
118 drm_takedown(dev);
119 return retcode;
120}
121
122/**
123 * File \c open operation.
124 *
125 * \param inode device inode.
126 * \param filp file pointer.
127 *
128 * Puts the dev->fops corresponding to the device minor number into
129 * \p filp, call the \c open method, and restore the file operations.
130 */
131int drm_stub_open(struct inode *inode, struct file *filp)
132{
133 drm_device_t *dev = NULL;
134 int minor = iminor(inode);
135 int err = -ENODEV;
136 struct file_operations *old_fops;
137
138 DRM_DEBUG("\n");
139
140 if (!((minor >= 0) && (minor < drm_cards_limit)))
141 return -ENODEV;
142
143 if (!drm_heads[minor])
144 return -ENODEV;
145
146 if (!(dev = drm_heads[minor]->dev))
147 return -ENODEV;
148
149 old_fops = filp->f_op;
150 filp->f_op = fops_get(&dev->driver->fops);
151 if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) {
152 fops_put(filp->f_op);
153 filp->f_op = fops_get(old_fops);
154 }
155 fops_put(old_fops);
156
157 return err;
158}
159
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160/**
161 * Get a secondary minor number.
162 *
163 * \param dev device data structure
164 * \param sec-minor structure to hold the assigned minor
165 * \return negative number on failure.
166 *
167 * Search an empty entry and initialize it to the given parameters, and
168 * create the proc init entry via proc_init(). This routines assigns
169 * minor numbers to secondary heads of multi-headed cards
170 */
Dave Airliec94f7022005-07-07 21:03:38 +1000171static int drm_get_head(drm_device_t *dev, drm_head_t *head)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172{
173 drm_head_t **heads = drm_heads;
174 int ret;
175 int minor;
176
177 DRM_DEBUG("\n");
178
179 for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
180 if (!*heads) {
181
182 *head = (drm_head_t) {
183 .dev = dev,
184 .device = MKDEV(DRM_MAJOR, minor),
185 .minor = minor,
186 };
187
188 if ((ret = drm_proc_init(dev, minor, drm_proc_root, &head->dev_root))) {
189 printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n");
190 goto err_g1;
191 }
192
193
194 head->dev_class = drm_sysfs_device_add(drm_class,
195 MKDEV(DRM_MAJOR,
196 minor),
197 &dev->pdev->dev,
198 "card%d", minor);
199 if (IS_ERR(head->dev_class)) {
200 printk(KERN_ERR "DRM: Error sysfs_device_add.\n");
201 ret = PTR_ERR(head->dev_class);
202 goto err_g2;
203 }
204 *heads = head;
205
206 DRM_DEBUG("new minor assigned %d\n", minor);
207 return 0;
208 }
209 }
210 DRM_ERROR("out of minors\n");
211 return -ENOMEM;
212err_g2:
213 drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
214err_g1:
215 *head = (drm_head_t) {.dev = NULL};
216 return ret;
217}
218
Dave Airliec94f7022005-07-07 21:03:38 +1000219/**
220 * Register.
221 *
222 * \param pdev - PCI device structure
223 * \param ent entry from the PCI ID table with device type flags
224 * \return zero on success or a negative number on failure.
225 *
226 * Attempt to gets inter module "drm" information. If we are first
227 * then register the character device and inter module information.
228 * Try and register, if we fail to register, backout previous work.
229 */
230int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
231 struct drm_driver *driver)
232{
233 drm_device_t *dev;
234 int ret;
235
236 DRM_DEBUG("\n");
237
238 dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
239 if (!dev)
240 return -ENOMEM;
241
242 pci_enable_device(pdev);
243
244 if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
245 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
246 goto err_g1;
247 }
248 if ((ret = drm_get_head(dev, &dev->primary)))
249 goto err_g1;
250
251 /* postinit is a required function to display the signon banner */
252 /* drivers add secondary heads here if needed */
253 if ((ret = dev->driver->postinit(dev, ent->driver_data)))
254 goto err_g1;
255
256 return 0;
257
258err_g1:
259 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
260 return ret;
261}
262EXPORT_SYMBOL(drm_get_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
264/**
265 * Put a device minor number.
266 *
267 * \param dev device data structure
268 * \return always zero
269 *
270 * Cleans up the proc resources. If it is the last minor then release the foreign
271 * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
272 * unregisters the character device.
273 */
274int drm_put_dev(drm_device_t * dev)
275{
276 DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
277
278 if (dev->unique) {
279 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
280 dev->unique = NULL;
281 dev->unique_len = 0;
282 }
283 if (dev->devname) {
284 drm_free(dev->devname, strlen(dev->devname) + 1,
285 DRM_MEM_DRIVER);
286 dev->devname = NULL;
287 }
288 drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
289 return 0;
290}
291
292/**
293 * Put a secondary minor number.
294 *
295 * \param sec_minor - structure to be released
296 * \return always zero
297 *
298 * Cleans up the proc resources. Not legal for this to be the
299 * last minor released.
300 *
301 */
302int drm_put_head(drm_head_t *head)
303{
304 int minor = head->minor;
305
306 DRM_DEBUG("release secondary minor %d\n", minor);
307
308 drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
309 drm_sysfs_device_remove(MKDEV(DRM_MAJOR, head->minor));
310
311 *head = (drm_head_t){.dev = NULL};
312
313 drm_heads[minor] = NULL;
314
315 return 0;
316}
317