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Merge branch 'origin' into modesetting-101
[android-x86/external-libdrm.git] / linux-core / drm_stub.c
1 /**
2  * \file drm_stub.c
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
37 #include "drmP.h"
38 #include "drm_core.h"
39
40 unsigned int drm_cards_limit = 16;      /* Enough for one machine */
41 unsigned int drm_debug = 0;             /* 1 to enable debug output */
42 EXPORT_SYMBOL(drm_debug);
43
44 MODULE_AUTHOR(CORE_AUTHOR);
45 MODULE_DESCRIPTION(CORE_DESC);
46 MODULE_LICENSE("GPL and additional rights");
47 MODULE_PARM_DESC(cards_limit, "Maximum number of graphics cards");
48 MODULE_PARM_DESC(debug, "Enable debug output");
49
50 module_param_named(cards_limit, drm_cards_limit, int, 0444);
51 module_param_named(debug, drm_debug, int, 0600);
52
53 drm_head_t **drm_heads;
54 struct drm_sysfs_class *drm_class;
55 struct proc_dir_entry *drm_proc_root;
56
57 static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
58                        const struct pci_device_id *ent,
59                        struct drm_driver *driver)
60 {
61         int retcode;
62
63         spin_lock_init(&dev->count_lock);
64         spin_lock_init(&dev->drw_lock);
65         spin_lock_init(&dev->tasklet_lock);
66         spin_lock_init(&dev->lock.spinlock);
67         init_timer(&dev->timer);
68         mutex_init(&dev->struct_mutex);
69         mutex_init(&dev->ctxlist_mutex);
70         mutex_init(&dev->bm.init_mutex);
71         mutex_init(&dev->bm.evict_mutex);
72
73         dev->pdev = pdev;
74         dev->pci_device = pdev->device;
75         dev->pci_vendor = pdev->vendor;
76
77 #ifdef __alpha__
78         dev->hose = pdev->sysdata;
79 #endif
80         dev->irq = pdev->irq;
81
82         if (drm_ht_create(&dev->map_hash, DRM_MAP_HASH_ORDER))
83                 return -ENOMEM;
84
85         if (drm_mm_init(&dev->offset_manager, DRM_FILE_PAGE_OFFSET_START,
86                         DRM_FILE_PAGE_OFFSET_SIZE)) {
87                 drm_ht_remove(&dev->map_hash);
88                 return -ENOMEM;
89         }
90
91         if (drm_ht_create(&dev->object_hash, DRM_OBJECT_HASH_ORDER)) {
92                 drm_ht_remove(&dev->map_hash);
93                 drm_mm_takedown(&dev->offset_manager);
94                 return -ENOMEM;
95         }
96
97         dev->maplist = drm_calloc(1, sizeof(*dev->maplist), DRM_MEM_MAPS);
98         if (dev->maplist == NULL) {
99                 drm_ht_remove(&dev->object_hash);
100                 drm_ht_remove(&dev->map_hash);
101                 drm_mm_takedown(&dev->offset_manager);
102                 return -ENOMEM;
103         }
104         INIT_LIST_HEAD(&dev->maplist->head);
105
106         /* the DRM has 6 counters */
107         dev->counters = 6;
108         dev->types[0] = _DRM_STAT_LOCK;
109         dev->types[1] = _DRM_STAT_OPENS;
110         dev->types[2] = _DRM_STAT_CLOSES;
111         dev->types[3] = _DRM_STAT_IOCTLS;
112         dev->types[4] = _DRM_STAT_LOCKS;
113         dev->types[5] = _DRM_STAT_UNLOCKS;
114
115         dev->driver = driver;
116
117         if (drm_core_has_AGP(dev)) {
118                 if (drm_device_is_agp(dev))
119                         dev->agp = drm_agp_init(dev);
120                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
121                     && (dev->agp == NULL)) {
122                         DRM_ERROR("Cannot initialize the agpgart module.\n");
123                         retcode = -EINVAL;
124                         goto error_out_unreg;
125                 }
126
127                 if (drm_core_has_MTRR(dev)) {
128                         if (dev->agp)
129                                 dev->agp->agp_mtrr =
130                                     mtrr_add(dev->agp->agp_info.aper_base,
131                                              dev->agp->agp_info.aper_size *
132                                              1024 * 1024, MTRR_TYPE_WRCOMB, 1);
133                 }
134         }
135
136         if (dev->driver->load)
137                 if ((retcode = dev->driver->load(dev, ent->driver_data)))
138                         goto error_out_unreg;
139
140         retcode = drm_ctxbitmap_init(dev);
141         if (retcode) {
142                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
143                 goto error_out_unreg;
144         }
145
146         drm_fence_manager_init(dev);
147         return 0;
148
149 error_out_unreg:
150         drm_lastclose(dev);
151         return retcode;
152 }
153
154 /**
155  * Get a secondary minor number.
156  *
157  * \param dev device data structure
158  * \param sec-minor structure to hold the assigned minor
159  * \return negative number on failure.
160  *
161  * Search an empty entry and initialize it to the given parameters, and
162  * create the proc init entry via proc_init(). This routines assigns
163  * minor numbers to secondary heads of multi-headed cards
164  */
165 static int drm_get_head(drm_device_t * dev, drm_head_t * head)
166 {
167         drm_head_t **heads = drm_heads;
168         int ret;
169         int minor;
170
171         DRM_DEBUG("\n");
172
173         for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
174                 if (!*heads) {
175
176                         *head = (drm_head_t) {
177                                 .dev = dev,
178                                 .device = MKDEV(DRM_MAJOR, minor),
179                                 .minor = minor,
180                         };
181                         if ((ret =
182                              drm_proc_init(dev, minor, drm_proc_root,
183                                            &head->dev_root))) {
184                                 printk(KERN_ERR
185                                        "DRM: Failed to initialize /proc/dri.\n");
186                                 goto err_g1;
187                         }
188
189                         head->dev_class = drm_sysfs_device_add(drm_class, head);
190                         if (IS_ERR(head->dev_class)) {
191                                 printk(KERN_ERR
192                                        "DRM: Error sysfs_device_add.\n");
193                                 ret = PTR_ERR(head->dev_class);
194                                 goto err_g2;
195                         }
196                         *heads = head;
197
198                         DRM_DEBUG("new minor assigned %d\n", minor);
199                         return 0;
200                 }
201         }
202         DRM_ERROR("out of minors\n");
203         return -ENOMEM;
204 err_g2:
205         drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
206 err_g1:
207         *head = (drm_head_t) {
208                 .dev = NULL};
209         return ret;
210 }
211
212 /**
213  * Register.
214  *
215  * \param pdev - PCI device structure
216  * \param ent entry from the PCI ID table with device type flags
217  * \return zero on success or a negative number on failure.
218  *
219  * Attempt to gets inter module "drm" information. If we are first
220  * then register the character device and inter module information.
221  * Try and register, if we fail to register, backout previous work.
222  */
223 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
224               struct drm_driver *driver)
225 {
226         drm_device_t *dev;
227         int ret;
228
229         DRM_DEBUG("\n");
230
231         dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
232         if (!dev)
233                 return -ENOMEM;
234
235         if (!drm_fb_loaded) {
236                 pci_set_drvdata(pdev, dev);
237                 pci_request_regions(pdev, driver->pci_driver.name);
238         }
239
240         pci_enable_device(pdev);
241         pci_set_master(pdev);
242
243         if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
244                 printk(KERN_ERR "DRM: fill_in_dev failed\n");
245                 goto err_g1;
246         }
247         if ((ret = drm_get_head(dev, &dev->primary)))
248                 goto err_g1;
249
250         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
251                  driver->name, driver->major, driver->minor, driver->patchlevel,
252                  driver->date, dev->primary.minor);
253
254         return 0;
255
256 err_g1:
257         if (!drm_fb_loaded) {
258                 pci_set_drvdata(pdev, NULL);
259                 pci_release_regions(pdev);
260                 pci_disable_device(pdev);
261         }
262         drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
263         printk(KERN_ERR "DRM: drm_get_dev failed.\n");
264         return ret;
265 }
266 EXPORT_SYMBOL(drm_get_dev);
267
268
269 /**
270  * Put a device minor number.
271  *
272  * \param dev device data structure
273  * \return always zero
274  *
275  * Cleans up the proc resources. If it is the last minor then release the foreign
276  * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
277  * unregisters the character device.
278  */
279 int drm_put_dev(drm_device_t * dev)
280 {
281         DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
282
283         if (dev->unique) {
284                 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
285                 dev->unique = NULL;
286                 dev->unique_len = 0;
287         }
288         if (dev->devname) {
289                 drm_free(dev->devname, strlen(dev->devname) + 1,
290                          DRM_MEM_DRIVER);
291                 dev->devname = NULL;
292         }
293         drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
294         return 0;
295 }
296
297 /**
298  * Put a secondary minor number.
299  *
300  * \param sec_minor - structure to be released
301  * \return always zero
302  *
303  * Cleans up the proc resources. Not legal for this to be the
304  * last minor released.
305  *
306  */
307 int drm_put_head(drm_head_t * head)
308 {
309         int minor = head->minor;
310
311         DRM_DEBUG("release secondary minor %d\n", minor);
312
313         drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
314         drm_sysfs_device_remove(head->dev_class);
315
316         *head = (drm_head_t){.dev = NULL};
317
318         drm_heads[minor] = NULL;
319         return 0;
320 }