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1da177e4 LT |
1 | /* |
2 | * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org | |
3 | * | |
4 | * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. | |
5 | * All Rights Reserved. | |
6 | * | |
c6a1af8a TR |
7 | * Author Rickard E. (Rik) Faith <faith@valinux.com> |
8 | * | |
1da177e4 LT |
9 | * Permission is hereby granted, free of charge, to any person obtaining a |
10 | * copy of this software and associated documentation files (the "Software"), | |
11 | * to deal in the Software without restriction, including without limitation | |
12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
13 | * and/or sell copies of the Software, and to permit persons to whom the | |
14 | * Software is furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice (including the next | |
17 | * paragraph) shall be included in all copies or substantial portions of the | |
18 | * Software. | |
19 | * | |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
23 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
24 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
25 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
26 | * DEALINGS IN THE SOFTWARE. | |
27 | */ | |
28 | ||
1b7199fe | 29 | #include <linux/debugfs.h> |
31bbe16f | 30 | #include <linux/fs.h> |
1da177e4 LT |
31 | #include <linux/module.h> |
32 | #include <linux/moduleparam.h> | |
31bbe16f | 33 | #include <linux/mount.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
760285e7 DH |
35 | #include <drm/drmP.h> |
36 | #include <drm/drm_core.h> | |
e7b96070 | 37 | #include "drm_legacy.h" |
67d0ec4e | 38 | #include "drm_internal.h" |
1da177e4 | 39 | |
6dc3e22e EG |
40 | /* |
41 | * drm_debug: Enable debug output. | |
42 | * Bitmask of DRM_UT_x. See include/drm/drmP.h for details. | |
43 | */ | |
44 | unsigned int drm_debug = 0; | |
1da177e4 LT |
45 | EXPORT_SYMBOL(drm_debug); |
46 | ||
b5e89ed5 DA |
47 | MODULE_AUTHOR(CORE_AUTHOR); |
48 | MODULE_DESCRIPTION(CORE_DESC); | |
1da177e4 | 49 | MODULE_LICENSE("GPL and additional rights"); |
6dc3e22e EG |
50 | MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug category.\n" |
51 | "\t\tBit 0 (0x01) will enable CORE messages (drm core code)\n" | |
52 | "\t\tBit 1 (0x02) will enable DRIVER messages (drm controller code)\n" | |
53 | "\t\tBit 2 (0x04) will enable KMS messages (modesetting code)\n" | |
54 | "\t\tBit 3 (0x08) will enable PRIME messages (prime code)\n" | |
55 | "\t\tBit 4 (0x10) will enable ATOMIC messages (atomic code)\n" | |
56 | "\t\tBit 5 (0x20) will enable VBL messages (vblank code)"); | |
c0758146 | 57 | module_param_named(debug, drm_debug, int, 0600); |
1da177e4 | 58 | |
0d639883 | 59 | static DEFINE_SPINLOCK(drm_minor_lock); |
1b7199fe | 60 | static struct idr drm_minors_idr; |
2c14f28b | 61 | |
1b7199fe | 62 | static struct dentry *drm_debugfs_root; |
5ad3d883 | 63 | |
a1f1a79c | 64 | void drm_err(const char *format, ...) |
5ad3d883 JP |
65 | { |
66 | struct va_format vaf; | |
67 | va_list args; | |
5ad3d883 JP |
68 | |
69 | va_start(args, format); | |
70 | ||
71 | vaf.fmt = format; | |
72 | vaf.va = &args; | |
73 | ||
2ee762b3 | 74 | printk(KERN_ERR "[" DRM_NAME ":%ps] *ERROR* %pV", |
a1f1a79c | 75 | __builtin_return_address(0), &vaf); |
5ad3d883 JP |
76 | |
77 | va_end(args); | |
5ad3d883 JP |
78 | } |
79 | EXPORT_SYMBOL(drm_err); | |
80 | ||
1287aa90 | 81 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
4fefcb27 | 82 | { |
fffb9065 | 83 | struct va_format vaf; |
4fefcb27 | 84 | va_list args; |
1da177e4 | 85 | |
a73d4e91 LD |
86 | va_start(args, format); |
87 | vaf.fmt = format; | |
88 | vaf.va = &args; | |
89 | ||
0ed02983 | 90 | printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf); |
a73d4e91 LD |
91 | |
92 | va_end(args); | |
4fefcb27 | 93 | } |
94 | EXPORT_SYMBOL(drm_ut_debug_printk); | |
5ad3d883 | 95 | |
0d639883 DH |
96 | /* |
97 | * DRM Minors | |
98 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each | |
99 | * of them is represented by a drm_minor object. Depending on the capabilities | |
100 | * of the device-driver, different interfaces are registered. | |
1da177e4 | 101 | * |
0d639883 DH |
102 | * Minors can be accessed via dev->$minor_name. This pointer is either |
103 | * NULL or a valid drm_minor pointer and stays valid as long as the device is | |
104 | * valid. This means, DRM minors have the same life-time as the underlying | |
105 | * device. However, this doesn't mean that the minor is active. Minors are | |
106 | * registered and unregistered dynamically according to device-state. | |
1da177e4 | 107 | */ |
0d639883 | 108 | |
05b701f6 DH |
109 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
110 | unsigned int type) | |
111 | { | |
112 | switch (type) { | |
113 | case DRM_MINOR_LEGACY: | |
114 | return &dev->primary; | |
115 | case DRM_MINOR_RENDER: | |
116 | return &dev->render; | |
117 | case DRM_MINOR_CONTROL: | |
118 | return &dev->control; | |
119 | default: | |
120 | return NULL; | |
121 | } | |
122 | } | |
123 | ||
124 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) | |
125 | { | |
126 | struct drm_minor *minor; | |
f1b85962 DH |
127 | unsigned long flags; |
128 | int r; | |
05b701f6 DH |
129 | |
130 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); | |
131 | if (!minor) | |
132 | return -ENOMEM; | |
133 | ||
134 | minor->type = type; | |
135 | minor->dev = dev; | |
05b701f6 | 136 | |
f1b85962 DH |
137 | idr_preload(GFP_KERNEL); |
138 | spin_lock_irqsave(&drm_minor_lock, flags); | |
139 | r = idr_alloc(&drm_minors_idr, | |
140 | NULL, | |
141 | 64 * type, | |
142 | 64 * (type + 1), | |
143 | GFP_NOWAIT); | |
144 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
145 | idr_preload_end(); | |
146 | ||
147 | if (r < 0) | |
148 | goto err_free; | |
149 | ||
150 | minor->index = r; | |
151 | ||
e1728075 DH |
152 | minor->kdev = drm_sysfs_minor_alloc(minor); |
153 | if (IS_ERR(minor->kdev)) { | |
154 | r = PTR_ERR(minor->kdev); | |
155 | goto err_index; | |
156 | } | |
157 | ||
05b701f6 DH |
158 | *drm_minor_get_slot(dev, type) = minor; |
159 | return 0; | |
f1b85962 | 160 | |
e1728075 DH |
161 | err_index: |
162 | spin_lock_irqsave(&drm_minor_lock, flags); | |
163 | idr_remove(&drm_minors_idr, minor->index); | |
164 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
f1b85962 DH |
165 | err_free: |
166 | kfree(minor); | |
167 | return r; | |
05b701f6 DH |
168 | } |
169 | ||
bd9dfa98 DH |
170 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
171 | { | |
f1b85962 DH |
172 | struct drm_minor **slot, *minor; |
173 | unsigned long flags; | |
bd9dfa98 DH |
174 | |
175 | slot = drm_minor_get_slot(dev, type); | |
f1b85962 DH |
176 | minor = *slot; |
177 | if (!minor) | |
178 | return; | |
179 | ||
e1728075 | 180 | put_device(minor->kdev); |
f1b85962 DH |
181 | |
182 | spin_lock_irqsave(&drm_minor_lock, flags); | |
183 | idr_remove(&drm_minors_idr, minor->index); | |
184 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
185 | ||
186 | kfree(minor); | |
187 | *slot = NULL; | |
bd9dfa98 DH |
188 | } |
189 | ||
afcdbc86 | 190 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
1da177e4 | 191 | { |
f1b85962 | 192 | struct drm_minor *minor; |
0d639883 | 193 | unsigned long flags; |
1da177e4 | 194 | int ret; |
1da177e4 LT |
195 | |
196 | DRM_DEBUG("\n"); | |
197 | ||
f1b85962 DH |
198 | minor = *drm_minor_get_slot(dev, type); |
199 | if (!minor) | |
05b701f6 DH |
200 | return 0; |
201 | ||
f1b85962 | 202 | ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root); |
955b12de | 203 | if (ret) { |
156f5a78 | 204 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
f1b85962 | 205 | return ret; |
955b12de | 206 | } |
2c14f28b | 207 | |
e1728075 DH |
208 | ret = device_add(minor->kdev); |
209 | if (ret) | |
cb6458f9 | 210 | goto err_debugfs; |
2c14f28b | 211 | |
0d639883 DH |
212 | /* replace NULL with @minor so lookups will succeed from now on */ |
213 | spin_lock_irqsave(&drm_minor_lock, flags); | |
f1b85962 | 214 | idr_replace(&drm_minors_idr, minor, minor->index); |
0d639883 | 215 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
2c14f28b | 216 | |
f1b85962 | 217 | DRM_DEBUG("new minor registered %d\n", minor->index); |
2c14f28b DA |
218 | return 0; |
219 | ||
cb6458f9 | 220 | err_debugfs: |
f1b85962 | 221 | drm_debugfs_cleanup(minor); |
1da177e4 LT |
222 | return ret; |
223 | } | |
b5e89ed5 | 224 | |
afcdbc86 | 225 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
f73aca50 | 226 | { |
afcdbc86 | 227 | struct drm_minor *minor; |
0d639883 | 228 | unsigned long flags; |
afcdbc86 DH |
229 | |
230 | minor = *drm_minor_get_slot(dev, type); | |
e1728075 | 231 | if (!minor || !device_is_registered(minor->kdev)) |
f73aca50 DH |
232 | return; |
233 | ||
f1b85962 | 234 | /* replace @minor with NULL so lookups will fail from now on */ |
0d639883 | 235 | spin_lock_irqsave(&drm_minor_lock, flags); |
f1b85962 | 236 | idr_replace(&drm_minors_idr, NULL, minor->index); |
0d639883 | 237 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
865fb47f | 238 | |
e1728075 DH |
239 | device_del(minor->kdev); |
240 | dev_set_drvdata(minor->kdev, NULL); /* safety belt */ | |
865fb47f | 241 | drm_debugfs_cleanup(minor); |
f73aca50 DH |
242 | } |
243 | ||
244 | /** | |
1616c525 DH |
245 | * drm_minor_acquire - Acquire a DRM minor |
246 | * @minor_id: Minor ID of the DRM-minor | |
247 | * | |
248 | * Looks up the given minor-ID and returns the respective DRM-minor object. The | |
249 | * refence-count of the underlying device is increased so you must release this | |
250 | * object with drm_minor_release(). | |
251 | * | |
252 | * As long as you hold this minor, it is guaranteed that the object and the | |
253 | * minor->dev pointer will stay valid! However, the device may get unplugged and | |
254 | * unregistered while you hold the minor. | |
f73aca50 | 255 | * |
1616c525 DH |
256 | * Returns: |
257 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on | |
258 | * failure. | |
1da177e4 | 259 | */ |
1616c525 | 260 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
1da177e4 | 261 | { |
1616c525 | 262 | struct drm_minor *minor; |
0d639883 | 263 | unsigned long flags; |
1616c525 | 264 | |
0d639883 | 265 | spin_lock_irqsave(&drm_minor_lock, flags); |
1616c525 | 266 | minor = idr_find(&drm_minors_idr, minor_id); |
0d639883 DH |
267 | if (minor) |
268 | drm_dev_ref(minor->dev); | |
269 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
270 | ||
271 | if (!minor) { | |
272 | return ERR_PTR(-ENODEV); | |
273 | } else if (drm_device_is_unplugged(minor->dev)) { | |
274 | drm_dev_unref(minor->dev); | |
1616c525 | 275 | return ERR_PTR(-ENODEV); |
0d639883 | 276 | } |
673a394b | 277 | |
1616c525 DH |
278 | return minor; |
279 | } | |
b5e89ed5 | 280 | |
1616c525 DH |
281 | /** |
282 | * drm_minor_release - Release DRM minor | |
283 | * @minor: Pointer to DRM minor object | |
284 | * | |
285 | * Release a minor that was previously acquired via drm_minor_acquire(). | |
286 | */ | |
287 | void drm_minor_release(struct drm_minor *minor) | |
288 | { | |
289 | drm_dev_unref(minor->dev); | |
1da177e4 | 290 | } |
112b715e | 291 | |
6e3f797c DV |
292 | /** |
293 | * DOC: driver instance overview | |
294 | * | |
295 | * A device instance for a drm driver is represented by struct &drm_device. This | |
296 | * is allocated with drm_dev_alloc(), usually from bus-specific ->probe() | |
297 | * callbacks implemented by the driver. The driver then needs to initialize all | |
298 | * the various subsystems for the drm device like memory management, vblank | |
299 | * handling, modesetting support and intial output configuration plus obviously | |
300 | * initialize all the corresponding hardware bits. An important part of this is | |
301 | * also calling drm_dev_set_unique() to set the userspace-visible unique name of | |
302 | * this device instance. Finally when everything is up and running and ready for | |
303 | * userspace the device instance can be published using drm_dev_register(). | |
304 | * | |
305 | * There is also deprecated support for initalizing device instances using | |
306 | * bus-specific helpers and the ->load() callback. But due to | |
307 | * backwards-compatibility needs the device instance have to be published too | |
308 | * early, which requires unpretty global locking to make safe and is therefore | |
309 | * only support for existing drivers not yet converted to the new scheme. | |
310 | * | |
311 | * When cleaning up a device instance everything needs to be done in reverse: | |
312 | * First unpublish the device instance with drm_dev_unregister(). Then clean up | |
313 | * any other resources allocated at device initialization and drop the driver's | |
314 | * reference to &drm_device using drm_dev_unref(). | |
315 | * | |
316 | * Note that the lifetime rules for &drm_device instance has still a lot of | |
317 | * historical baggage. Hence use the reference counting provided by | |
318 | * drm_dev_ref() and drm_dev_unref() only carefully. | |
319 | * | |
320 | * Also note that embedding of &drm_device is currently not (yet) supported (but | |
321 | * it would be easy to add). Drivers can store driver-private data in the | |
322 | * dev_priv field of &drm_device. | |
323 | */ | |
324 | ||
112b715e | 325 | /** |
c6a1af8a TR |
326 | * drm_put_dev - Unregister and release a DRM device |
327 | * @dev: DRM device | |
112b715e | 328 | * |
c6a1af8a | 329 | * Called at module unload time or when a PCI device is unplugged. |
112b715e | 330 | * |
c6a1af8a | 331 | * Cleans up all DRM device, calling drm_lastclose(). |
6e3f797c DV |
332 | * |
333 | * Note: Use of this function is deprecated. It will eventually go away | |
334 | * completely. Please use drm_dev_unregister() and drm_dev_unref() explicitly | |
335 | * instead to make sure that the device isn't userspace accessible any more | |
336 | * while teardown is in progress, ensuring that userspace can't access an | |
337 | * inconsistent state. | |
112b715e KH |
338 | */ |
339 | void drm_put_dev(struct drm_device *dev) | |
340 | { | |
112b715e KH |
341 | DRM_DEBUG("\n"); |
342 | ||
343 | if (!dev) { | |
344 | DRM_ERROR("cleanup called no dev\n"); | |
345 | return; | |
346 | } | |
347 | ||
c3a49737 | 348 | drm_dev_unregister(dev); |
099d1c29 | 349 | drm_dev_unref(dev); |
112b715e KH |
350 | } |
351 | EXPORT_SYMBOL(drm_put_dev); | |
2c07a21d DA |
352 | |
353 | void drm_unplug_dev(struct drm_device *dev) | |
354 | { | |
355 | /* for a USB device */ | |
afcdbc86 DH |
356 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
357 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
358 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
2c07a21d DA |
359 | |
360 | mutex_lock(&drm_global_mutex); | |
361 | ||
362 | drm_device_set_unplugged(dev); | |
363 | ||
364 | if (dev->open_count == 0) { | |
365 | drm_put_dev(dev); | |
366 | } | |
367 | mutex_unlock(&drm_global_mutex); | |
368 | } | |
369 | EXPORT_SYMBOL(drm_unplug_dev); | |
1bb72532 | 370 | |
31bbe16f DH |
371 | /* |
372 | * DRM internal mount | |
373 | * We want to be able to allocate our own "struct address_space" to control | |
374 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow | |
375 | * stand-alone address_space objects, so we need an underlying inode. As there | |
376 | * is no way to allocate an independent inode easily, we need a fake internal | |
377 | * VFS mount-point. | |
378 | * | |
379 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() | |
380 | * frees it again. You are allowed to use iget() and iput() to get references to | |
381 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one | |
382 | * drm_fs_inode_free() call (which does not have to be the last iput()). | |
383 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it | |
384 | * between multiple inode-users. You could, technically, call | |
385 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an | |
386 | * iput(), but this way you'd end up with a new vfsmount for each inode. | |
387 | */ | |
388 | ||
389 | static int drm_fs_cnt; | |
390 | static struct vfsmount *drm_fs_mnt; | |
391 | ||
392 | static const struct dentry_operations drm_fs_dops = { | |
393 | .d_dname = simple_dname, | |
394 | }; | |
395 | ||
396 | static const struct super_operations drm_fs_sops = { | |
397 | .statfs = simple_statfs, | |
398 | }; | |
399 | ||
400 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, | |
401 | const char *dev_name, void *data) | |
402 | { | |
403 | return mount_pseudo(fs_type, | |
404 | "drm:", | |
405 | &drm_fs_sops, | |
406 | &drm_fs_dops, | |
407 | 0x010203ff); | |
408 | } | |
409 | ||
410 | static struct file_system_type drm_fs_type = { | |
411 | .name = "drm", | |
412 | .owner = THIS_MODULE, | |
413 | .mount = drm_fs_mount, | |
414 | .kill_sb = kill_anon_super, | |
415 | }; | |
416 | ||
417 | static struct inode *drm_fs_inode_new(void) | |
418 | { | |
419 | struct inode *inode; | |
420 | int r; | |
421 | ||
422 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); | |
423 | if (r < 0) { | |
424 | DRM_ERROR("Cannot mount pseudo fs: %d\n", r); | |
425 | return ERR_PTR(r); | |
426 | } | |
427 | ||
428 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); | |
429 | if (IS_ERR(inode)) | |
430 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
431 | ||
432 | return inode; | |
433 | } | |
434 | ||
435 | static void drm_fs_inode_free(struct inode *inode) | |
436 | { | |
437 | if (inode) { | |
438 | iput(inode); | |
439 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
440 | } | |
441 | } | |
442 | ||
1bb72532 | 443 | /** |
c6a1af8a | 444 | * drm_dev_alloc - Allocate new DRM device |
1bb72532 DH |
445 | * @driver: DRM driver to allocate device for |
446 | * @parent: Parent device object | |
447 | * | |
448 | * Allocate and initialize a new DRM device. No device registration is done. | |
c22f0ace | 449 | * Call drm_dev_register() to advertice the device to user space and register it |
6e3f797c DV |
450 | * with other core subsystems. This should be done last in the device |
451 | * initialization sequence to make sure userspace can't access an inconsistent | |
452 | * state. | |
1bb72532 | 453 | * |
099d1c29 DH |
454 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
455 | * drm_dev_unref() to take and drop further ref-counts. | |
456 | * | |
b0ff4b93 DV |
457 | * Note that for purely virtual devices @parent can be NULL. |
458 | * | |
1bb72532 DH |
459 | * RETURNS: |
460 | * Pointer to new DRM device, or NULL if out of memory. | |
461 | */ | |
462 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, | |
463 | struct device *parent) | |
464 | { | |
465 | struct drm_device *dev; | |
466 | int ret; | |
467 | ||
468 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
469 | if (!dev) | |
470 | return NULL; | |
471 | ||
099d1c29 | 472 | kref_init(&dev->ref); |
1bb72532 DH |
473 | dev->dev = parent; |
474 | dev->driver = driver; | |
475 | ||
476 | INIT_LIST_HEAD(&dev->filelist); | |
477 | INIT_LIST_HEAD(&dev->ctxlist); | |
478 | INIT_LIST_HEAD(&dev->vmalist); | |
479 | INIT_LIST_HEAD(&dev->maplist); | |
480 | INIT_LIST_HEAD(&dev->vblank_event_list); | |
481 | ||
2177a218 | 482 | spin_lock_init(&dev->buf_lock); |
1bb72532 DH |
483 | spin_lock_init(&dev->event_lock); |
484 | mutex_init(&dev->struct_mutex); | |
1d2ac403 | 485 | mutex_init(&dev->filelist_mutex); |
1bb72532 | 486 | mutex_init(&dev->ctxlist_mutex); |
c996fd0b | 487 | mutex_init(&dev->master_mutex); |
1bb72532 | 488 | |
6796cb16 DH |
489 | dev->anon_inode = drm_fs_inode_new(); |
490 | if (IS_ERR(dev->anon_inode)) { | |
491 | ret = PTR_ERR(dev->anon_inode); | |
492 | DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); | |
1bb72532 | 493 | goto err_free; |
6796cb16 DH |
494 | } |
495 | ||
05b701f6 DH |
496 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
497 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); | |
498 | if (ret) | |
499 | goto err_minors; | |
500 | } | |
501 | ||
6d6dfcfb | 502 | if (drm_core_check_feature(dev, DRIVER_RENDER)) { |
05b701f6 DH |
503 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); |
504 | if (ret) | |
505 | goto err_minors; | |
506 | } | |
507 | ||
508 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); | |
509 | if (ret) | |
510 | goto err_minors; | |
511 | ||
6796cb16 | 512 | if (drm_ht_create(&dev->map_hash, 12)) |
05b701f6 | 513 | goto err_minors; |
1bb72532 | 514 | |
ba6976c1 | 515 | drm_legacy_ctxbitmap_init(dev); |
1bb72532 | 516 | |
1bcecfac | 517 | if (drm_core_check_feature(dev, DRIVER_GEM)) { |
1bb72532 DH |
518 | ret = drm_gem_init(dev); |
519 | if (ret) { | |
520 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); | |
521 | goto err_ctxbitmap; | |
522 | } | |
523 | } | |
524 | ||
e112e593 NI |
525 | if (parent) { |
526 | ret = drm_dev_set_unique(dev, dev_name(parent)); | |
527 | if (ret) | |
528 | goto err_setunique; | |
529 | } | |
530 | ||
1bb72532 DH |
531 | return dev; |
532 | ||
e112e593 NI |
533 | err_setunique: |
534 | if (drm_core_check_feature(dev, DRIVER_GEM)) | |
535 | drm_gem_destroy(dev); | |
1bb72532 | 536 | err_ctxbitmap: |
e7b96070 | 537 | drm_legacy_ctxbitmap_cleanup(dev); |
1bb72532 | 538 | drm_ht_remove(&dev->map_hash); |
05b701f6 | 539 | err_minors: |
bd9dfa98 DH |
540 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
541 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
542 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
6796cb16 | 543 | drm_fs_inode_free(dev->anon_inode); |
1bb72532 | 544 | err_free: |
c996fd0b | 545 | mutex_destroy(&dev->master_mutex); |
1bb72532 DH |
546 | kfree(dev); |
547 | return NULL; | |
548 | } | |
549 | EXPORT_SYMBOL(drm_dev_alloc); | |
c22f0ace | 550 | |
099d1c29 | 551 | static void drm_dev_release(struct kref *ref) |
0dc8fe59 | 552 | { |
099d1c29 | 553 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
8f6599da | 554 | |
1bcecfac | 555 | if (drm_core_check_feature(dev, DRIVER_GEM)) |
0dc8fe59 DH |
556 | drm_gem_destroy(dev); |
557 | ||
e7b96070 | 558 | drm_legacy_ctxbitmap_cleanup(dev); |
0dc8fe59 | 559 | drm_ht_remove(&dev->map_hash); |
6796cb16 | 560 | drm_fs_inode_free(dev->anon_inode); |
0dc8fe59 | 561 | |
bd9dfa98 DH |
562 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
563 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
564 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
565 | ||
c996fd0b | 566 | mutex_destroy(&dev->master_mutex); |
ca8e2ad7 | 567 | kfree(dev->unique); |
0dc8fe59 DH |
568 | kfree(dev); |
569 | } | |
099d1c29 DH |
570 | |
571 | /** | |
572 | * drm_dev_ref - Take reference of a DRM device | |
573 | * @dev: device to take reference of or NULL | |
574 | * | |
575 | * This increases the ref-count of @dev by one. You *must* already own a | |
576 | * reference when calling this. Use drm_dev_unref() to drop this reference | |
577 | * again. | |
578 | * | |
579 | * This function never fails. However, this function does not provide *any* | |
580 | * guarantee whether the device is alive or running. It only provides a | |
581 | * reference to the object and the memory associated with it. | |
582 | */ | |
583 | void drm_dev_ref(struct drm_device *dev) | |
584 | { | |
585 | if (dev) | |
586 | kref_get(&dev->ref); | |
587 | } | |
588 | EXPORT_SYMBOL(drm_dev_ref); | |
589 | ||
590 | /** | |
591 | * drm_dev_unref - Drop reference of a DRM device | |
592 | * @dev: device to drop reference of or NULL | |
593 | * | |
594 | * This decreases the ref-count of @dev by one. The device is destroyed if the | |
595 | * ref-count drops to zero. | |
596 | */ | |
597 | void drm_dev_unref(struct drm_device *dev) | |
598 | { | |
599 | if (dev) | |
600 | kref_put(&dev->ref, drm_dev_release); | |
601 | } | |
602 | EXPORT_SYMBOL(drm_dev_unref); | |
0dc8fe59 | 603 | |
c22f0ace DH |
604 | /** |
605 | * drm_dev_register - Register DRM device | |
606 | * @dev: Device to register | |
c6a1af8a | 607 | * @flags: Flags passed to the driver's .load() function |
c22f0ace DH |
608 | * |
609 | * Register the DRM device @dev with the system, advertise device to user-space | |
610 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() | |
54d2c2da AB |
611 | * previously. Right after drm_dev_register() the driver should call |
612 | * drm_connector_register_all() to register all connectors in sysfs. This is | |
613 | * a separate call for backward compatibility with drivers still using | |
614 | * the deprecated ->load() callback, where connectors are registered from within | |
615 | * the ->load() callback. | |
c22f0ace DH |
616 | * |
617 | * Never call this twice on any device! | |
618 | * | |
6e3f797c DV |
619 | * NOTE: To ensure backward compatibility with existing drivers method this |
620 | * function calls the ->load() method after registering the device nodes, | |
621 | * creating race conditions. Usage of the ->load() methods is therefore | |
622 | * deprecated, drivers must perform all initialization before calling | |
623 | * drm_dev_register(). | |
624 | * | |
c22f0ace DH |
625 | * RETURNS: |
626 | * 0 on success, negative error code on failure. | |
627 | */ | |
628 | int drm_dev_register(struct drm_device *dev, unsigned long flags) | |
629 | { | |
630 | int ret; | |
631 | ||
632 | mutex_lock(&drm_global_mutex); | |
633 | ||
afcdbc86 | 634 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
05b701f6 DH |
635 | if (ret) |
636 | goto err_minors; | |
c22f0ace | 637 | |
afcdbc86 | 638 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
05b701f6 DH |
639 | if (ret) |
640 | goto err_minors; | |
c22f0ace | 641 | |
afcdbc86 | 642 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
c22f0ace | 643 | if (ret) |
05b701f6 | 644 | goto err_minors; |
c22f0ace DH |
645 | |
646 | if (dev->driver->load) { | |
647 | ret = dev->driver->load(dev, flags); | |
648 | if (ret) | |
05b701f6 | 649 | goto err_minors; |
c22f0ace DH |
650 | } |
651 | ||
c22f0ace DH |
652 | ret = 0; |
653 | goto out_unlock; | |
654 | ||
05b701f6 | 655 | err_minors: |
afcdbc86 DH |
656 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
657 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
658 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c22f0ace DH |
659 | out_unlock: |
660 | mutex_unlock(&drm_global_mutex); | |
661 | return ret; | |
662 | } | |
663 | EXPORT_SYMBOL(drm_dev_register); | |
c3a49737 DH |
664 | |
665 | /** | |
666 | * drm_dev_unregister - Unregister DRM device | |
667 | * @dev: Device to unregister | |
668 | * | |
669 | * Unregister the DRM device from the system. This does the reverse of | |
670 | * drm_dev_register() but does not deallocate the device. The caller must call | |
099d1c29 | 671 | * drm_dev_unref() to drop their final reference. |
6e3f797c DV |
672 | * |
673 | * This should be called first in the device teardown code to make sure | |
674 | * userspace can't access the device instance any more. | |
c3a49737 DH |
675 | */ |
676 | void drm_dev_unregister(struct drm_device *dev) | |
677 | { | |
678 | struct drm_map_list *r_list, *list_temp; | |
679 | ||
680 | drm_lastclose(dev); | |
681 | ||
682 | if (dev->driver->unload) | |
683 | dev->driver->unload(dev); | |
684 | ||
4efafebe DV |
685 | if (dev->agp) |
686 | drm_pci_agp_destroy(dev); | |
c3a49737 DH |
687 | |
688 | drm_vblank_cleanup(dev); | |
689 | ||
690 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) | |
9fc5cde7 | 691 | drm_legacy_rmmap(dev, r_list->map); |
c3a49737 | 692 | |
afcdbc86 DH |
693 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
694 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
695 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c3a49737 DH |
696 | } |
697 | EXPORT_SYMBOL(drm_dev_unregister); | |
ca8e2ad7 TR |
698 | |
699 | /** | |
700 | * drm_dev_set_unique - Set the unique name of a DRM device | |
701 | * @dev: device of which to set the unique name | |
399368aa | 702 | * @name: unique name |
ca8e2ad7 | 703 | * |
399368aa NI |
704 | * Sets the unique name of a DRM device using the specified string. Drivers |
705 | * can use this at driver probe time if the unique name of the devices they | |
706 | * drive is static. | |
ca8e2ad7 TR |
707 | * |
708 | * Return: 0 on success or a negative error code on failure. | |
709 | */ | |
399368aa | 710 | int drm_dev_set_unique(struct drm_device *dev, const char *name) |
ca8e2ad7 | 711 | { |
ca8e2ad7 | 712 | kfree(dev->unique); |
399368aa | 713 | dev->unique = kstrdup(name, GFP_KERNEL); |
ca8e2ad7 TR |
714 | |
715 | return dev->unique ? 0 : -ENOMEM; | |
716 | } | |
717 | EXPORT_SYMBOL(drm_dev_set_unique); | |
1b7199fe DH |
718 | |
719 | /* | |
720 | * DRM Core | |
721 | * The DRM core module initializes all global DRM objects and makes them | |
722 | * available to drivers. Once setup, drivers can probe their respective | |
723 | * devices. | |
724 | * Currently, core management includes: | |
725 | * - The "DRM-Global" key/value database | |
726 | * - Global ID management for connectors | |
727 | * - DRM major number allocation | |
728 | * - DRM minor management | |
729 | * - DRM sysfs class | |
730 | * - DRM debugfs root | |
731 | * | |
732 | * Furthermore, the DRM core provides dynamic char-dev lookups. For each | |
733 | * interface registered on a DRM device, you can request minor numbers from DRM | |
734 | * core. DRM core takes care of major-number management and char-dev | |
735 | * registration. A stub ->open() callback forwards any open() requests to the | |
736 | * registered minor. | |
737 | */ | |
738 | ||
739 | static int drm_stub_open(struct inode *inode, struct file *filp) | |
740 | { | |
741 | const struct file_operations *new_fops; | |
742 | struct drm_minor *minor; | |
743 | int err; | |
744 | ||
745 | DRM_DEBUG("\n"); | |
746 | ||
747 | mutex_lock(&drm_global_mutex); | |
748 | minor = drm_minor_acquire(iminor(inode)); | |
749 | if (IS_ERR(minor)) { | |
750 | err = PTR_ERR(minor); | |
751 | goto out_unlock; | |
752 | } | |
753 | ||
754 | new_fops = fops_get(minor->dev->driver->fops); | |
755 | if (!new_fops) { | |
756 | err = -ENODEV; | |
757 | goto out_release; | |
758 | } | |
759 | ||
760 | replace_fops(filp, new_fops); | |
761 | if (filp->f_op->open) | |
762 | err = filp->f_op->open(inode, filp); | |
763 | else | |
764 | err = 0; | |
765 | ||
766 | out_release: | |
767 | drm_minor_release(minor); | |
768 | out_unlock: | |
769 | mutex_unlock(&drm_global_mutex); | |
770 | return err; | |
771 | } | |
772 | ||
773 | static const struct file_operations drm_stub_fops = { | |
774 | .owner = THIS_MODULE, | |
775 | .open = drm_stub_open, | |
776 | .llseek = noop_llseek, | |
777 | }; | |
778 | ||
779 | static int __init drm_core_init(void) | |
780 | { | |
781 | int ret = -ENOMEM; | |
782 | ||
783 | drm_global_init(); | |
784 | drm_connector_ida_init(); | |
785 | idr_init(&drm_minors_idr); | |
786 | ||
787 | if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) | |
788 | goto err_p1; | |
789 | ||
fcc90213 DH |
790 | ret = drm_sysfs_init(); |
791 | if (ret < 0) { | |
1b7199fe | 792 | printk(KERN_ERR "DRM: Error creating drm class.\n"); |
1b7199fe DH |
793 | goto err_p2; |
794 | } | |
795 | ||
796 | drm_debugfs_root = debugfs_create_dir("dri", NULL); | |
797 | if (!drm_debugfs_root) { | |
798 | DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); | |
799 | ret = -1; | |
800 | goto err_p3; | |
801 | } | |
802 | ||
803 | DRM_INFO("Initialized %s %d.%d.%d %s\n", | |
804 | CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
805 | return 0; | |
806 | err_p3: | |
807 | drm_sysfs_destroy(); | |
808 | err_p2: | |
809 | unregister_chrdev(DRM_MAJOR, "drm"); | |
810 | ||
811 | idr_destroy(&drm_minors_idr); | |
812 | err_p1: | |
813 | return ret; | |
814 | } | |
815 | ||
816 | static void __exit drm_core_exit(void) | |
817 | { | |
818 | debugfs_remove(drm_debugfs_root); | |
819 | drm_sysfs_destroy(); | |
820 | ||
821 | unregister_chrdev(DRM_MAJOR, "drm"); | |
822 | ||
823 | drm_connector_ida_destroy(); | |
824 | idr_destroy(&drm_minors_idr); | |
825 | } | |
826 | ||
827 | module_init(drm_core_init); | |
828 | module_exit(drm_core_exit); |