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1da177e4 LT |
1 | /** |
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 | ||
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); | |
42 | ||
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"); | |
48 | ||
49 | module_param_named(cards_limit, drm_cards_limit, int, 0444); | |
50 | module_param_named(debug, drm_debug, int, 0666); | |
51 | ||
52 | drm_head_t **drm_heads; | |
53 | struct drm_sysfs_class *drm_class; | |
54 | struct proc_dir_entry *drm_proc_root; | |
55 | ||
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) | |
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 | ||
117 | error_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 | */ | |
131 | int 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 | ||
1da177e4 LT |
160 | /** |
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 | */ | |
c94f7029 | 171 | static int drm_get_head(drm_device_t *dev, drm_head_t *head) |
1da177e4 LT |
172 | { |
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; | |
212 | err_g2: | |
213 | drm_proc_cleanup(minor, drm_proc_root, head->dev_root); | |
214 | err_g1: | |
215 | *head = (drm_head_t) {.dev = NULL}; | |
216 | return ret; | |
217 | } | |
218 | ||
c94f7029 DA |
219 | /** |
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 | */ | |
230 | int 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 | ||
258 | err_g1: | |
259 | drm_free(dev, sizeof(*dev), DRM_MEM_STUB); | |
260 | return ret; | |
261 | } | |
262 | EXPORT_SYMBOL(drm_get_dev); | |
1da177e4 LT |
263 | |
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 | */ | |
274 | int 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 | */ | |
302 | int 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 |