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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)) { | |
cda17380 DA |
94 | if (drm_device_is_agp(dev)) |
95 | dev->agp = drm_agp_init(dev); | |
1da177e4 LT |
96 | if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) && (dev->agp == NULL)) { |
97 | DRM_ERROR( "Cannot initialize the agpgart module.\n" ); | |
98 | retcode = -EINVAL; | |
99 | goto error_out_unreg; | |
100 | } | |
101 | if (drm_core_has_MTRR(dev)) { | |
102 | if (dev->agp) | |
103 | dev->agp->agp_mtrr = mtrr_add( dev->agp->agp_info.aper_base, | |
104 | dev->agp->agp_info.aper_size*1024*1024, | |
105 | MTRR_TYPE_WRCOMB, | |
106 | 1 ); | |
107 | } | |
108 | } | |
109 | ||
110 | retcode = drm_ctxbitmap_init( dev ); | |
111 | if( retcode ) { | |
112 | DRM_ERROR( "Cannot allocate memory for context bitmap.\n" ); | |
113 | goto error_out_unreg; | |
114 | } | |
115 | ||
116 | return 0; | |
117 | ||
118 | error_out_unreg: | |
119 | drm_takedown(dev); | |
120 | return retcode; | |
121 | } | |
122 | ||
123 | /** | |
124 | * File \c open operation. | |
125 | * | |
126 | * \param inode device inode. | |
127 | * \param filp file pointer. | |
128 | * | |
129 | * Puts the dev->fops corresponding to the device minor number into | |
130 | * \p filp, call the \c open method, and restore the file operations. | |
131 | */ | |
132 | int drm_stub_open(struct inode *inode, struct file *filp) | |
133 | { | |
134 | drm_device_t *dev = NULL; | |
135 | int minor = iminor(inode); | |
136 | int err = -ENODEV; | |
137 | struct file_operations *old_fops; | |
138 | ||
139 | DRM_DEBUG("\n"); | |
140 | ||
141 | if (!((minor >= 0) && (minor < drm_cards_limit))) | |
142 | return -ENODEV; | |
143 | ||
144 | if (!drm_heads[minor]) | |
145 | return -ENODEV; | |
146 | ||
147 | if (!(dev = drm_heads[minor]->dev)) | |
148 | return -ENODEV; | |
149 | ||
150 | old_fops = filp->f_op; | |
151 | filp->f_op = fops_get(&dev->driver->fops); | |
152 | if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) { | |
153 | fops_put(filp->f_op); | |
154 | filp->f_op = fops_get(old_fops); | |
155 | } | |
156 | fops_put(old_fops); | |
157 | ||
158 | return err; | |
159 | } | |
160 | ||
1da177e4 LT |
161 | /** |
162 | * Get a secondary minor number. | |
163 | * | |
164 | * \param dev device data structure | |
165 | * \param sec-minor structure to hold the assigned minor | |
166 | * \return negative number on failure. | |
167 | * | |
168 | * Search an empty entry and initialize it to the given parameters, and | |
169 | * create the proc init entry via proc_init(). This routines assigns | |
170 | * minor numbers to secondary heads of multi-headed cards | |
171 | */ | |
c94f7029 | 172 | static int drm_get_head(drm_device_t *dev, drm_head_t *head) |
1da177e4 LT |
173 | { |
174 | drm_head_t **heads = drm_heads; | |
175 | int ret; | |
176 | int minor; | |
177 | ||
178 | DRM_DEBUG("\n"); | |
179 | ||
180 | for (minor = 0; minor < drm_cards_limit; minor++, heads++) { | |
181 | if (!*heads) { | |
182 | ||
183 | *head = (drm_head_t) { | |
184 | .dev = dev, | |
185 | .device = MKDEV(DRM_MAJOR, minor), | |
186 | .minor = minor, | |
187 | }; | |
188 | ||
189 | if ((ret = drm_proc_init(dev, minor, drm_proc_root, &head->dev_root))) { | |
190 | printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n"); | |
191 | goto err_g1; | |
192 | } | |
193 | ||
194 | ||
195 | head->dev_class = drm_sysfs_device_add(drm_class, | |
196 | MKDEV(DRM_MAJOR, | |
197 | minor), | |
198 | &dev->pdev->dev, | |
199 | "card%d", minor); | |
200 | if (IS_ERR(head->dev_class)) { | |
201 | printk(KERN_ERR "DRM: Error sysfs_device_add.\n"); | |
202 | ret = PTR_ERR(head->dev_class); | |
203 | goto err_g2; | |
204 | } | |
205 | *heads = head; | |
206 | ||
207 | DRM_DEBUG("new minor assigned %d\n", minor); | |
208 | return 0; | |
209 | } | |
210 | } | |
211 | DRM_ERROR("out of minors\n"); | |
212 | return -ENOMEM; | |
213 | err_g2: | |
214 | drm_proc_cleanup(minor, drm_proc_root, head->dev_root); | |
215 | err_g1: | |
216 | *head = (drm_head_t) {.dev = NULL}; | |
217 | return ret; | |
218 | } | |
219 | ||
c94f7029 DA |
220 | /** |
221 | * Register. | |
222 | * | |
223 | * \param pdev - PCI device structure | |
224 | * \param ent entry from the PCI ID table with device type flags | |
225 | * \return zero on success or a negative number on failure. | |
226 | * | |
227 | * Attempt to gets inter module "drm" information. If we are first | |
228 | * then register the character device and inter module information. | |
229 | * Try and register, if we fail to register, backout previous work. | |
230 | */ | |
231 | int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent, | |
232 | struct drm_driver *driver) | |
233 | { | |
234 | drm_device_t *dev; | |
235 | int ret; | |
236 | ||
237 | DRM_DEBUG("\n"); | |
238 | ||
239 | dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB); | |
240 | if (!dev) | |
241 | return -ENOMEM; | |
242 | ||
243 | pci_enable_device(pdev); | |
244 | ||
245 | if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) { | |
246 | printk(KERN_ERR "DRM: Fill_in_dev failed.\n"); | |
247 | goto err_g1; | |
248 | } | |
249 | if ((ret = drm_get_head(dev, &dev->primary))) | |
250 | goto err_g1; | |
251 | ||
252 | /* postinit is a required function to display the signon banner */ | |
253 | /* drivers add secondary heads here if needed */ | |
254 | if ((ret = dev->driver->postinit(dev, ent->driver_data))) | |
255 | goto err_g1; | |
256 | ||
257 | return 0; | |
258 | ||
259 | err_g1: | |
260 | drm_free(dev, sizeof(*dev), DRM_MEM_STUB); | |
261 | return ret; | |
262 | } | |
263 | EXPORT_SYMBOL(drm_get_dev); | |
1da177e4 LT |
264 | |
265 | /** | |
266 | * Put a device minor number. | |
267 | * | |
268 | * \param dev device data structure | |
269 | * \return always zero | |
270 | * | |
271 | * Cleans up the proc resources. If it is the last minor then release the foreign | |
272 | * "drm" data, otherwise unregisters the "drm" data, frees the dev list and | |
273 | * unregisters the character device. | |
274 | */ | |
275 | int drm_put_dev(drm_device_t * dev) | |
276 | { | |
277 | DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name); | |
278 | ||
279 | if (dev->unique) { | |
280 | drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER); | |
281 | dev->unique = NULL; | |
282 | dev->unique_len = 0; | |
283 | } | |
284 | if (dev->devname) { | |
285 | drm_free(dev->devname, strlen(dev->devname) + 1, | |
286 | DRM_MEM_DRIVER); | |
287 | dev->devname = NULL; | |
288 | } | |
289 | drm_free(dev, sizeof(*dev), DRM_MEM_STUB); | |
290 | return 0; | |
291 | } | |
292 | ||
293 | /** | |
294 | * Put a secondary minor number. | |
295 | * | |
296 | * \param sec_minor - structure to be released | |
297 | * \return always zero | |
298 | * | |
299 | * Cleans up the proc resources. Not legal for this to be the | |
300 | * last minor released. | |
301 | * | |
302 | */ | |
303 | int drm_put_head(drm_head_t *head) | |
304 | { | |
305 | int minor = head->minor; | |
306 | ||
307 | DRM_DEBUG("release secondary minor %d\n", minor); | |
308 | ||
309 | drm_proc_cleanup(minor, drm_proc_root, head->dev_root); | |
310 | drm_sysfs_device_remove(MKDEV(DRM_MAJOR, head->minor)); | |
311 | ||
312 | *head = (drm_head_t){.dev = NULL}; | |
313 | ||
314 | drm_heads[minor] = NULL; | |
315 | ||
316 | return 0; | |
317 | } | |
318 |