121d70354SDave Airlie /* 221d70354SDave Airlie * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org 321d70354SDave Airlie * 421d70354SDave Airlie * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. 521d70354SDave Airlie * All Rights Reserved. 621d70354SDave Airlie * 721d70354SDave Airlie * Author Rickard E. (Rik) Faith <faith@valinux.com> 821d70354SDave Airlie * 921d70354SDave Airlie * Permission is hereby granted, free of charge, to any person obtaining a 1021d70354SDave Airlie * copy of this software and associated documentation files (the "Software"), 1121d70354SDave Airlie * to deal in the Software without restriction, including without limitation 1221d70354SDave Airlie * the rights to use, copy, modify, merge, publish, distribute, sublicense, 1321d70354SDave Airlie * and/or sell copies of the Software, and to permit persons to whom the 1421d70354SDave Airlie * Software is furnished to do so, subject to the following conditions: 1521d70354SDave Airlie * 1621d70354SDave Airlie * The above copyright notice and this permission notice (including the next 1721d70354SDave Airlie * paragraph) shall be included in all copies or substantial portions of the 1821d70354SDave Airlie * Software. 1921d70354SDave Airlie * 2021d70354SDave Airlie * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 2121d70354SDave Airlie * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 2221d70354SDave Airlie * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 2321d70354SDave Airlie * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 2421d70354SDave Airlie * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 2521d70354SDave Airlie * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 2621d70354SDave Airlie * DEALINGS IN THE SOFTWARE. 2721d70354SDave Airlie */ 2821d70354SDave Airlie 2921d70354SDave Airlie #include <linux/debugfs.h> 3021d70354SDave Airlie #include <linux/fs.h> 3121d70354SDave Airlie #include <linux/module.h> 3221d70354SDave Airlie #include <linux/moduleparam.h> 3321d70354SDave Airlie #include <linux/mount.h> 3421d70354SDave Airlie #include <linux/slab.h> 3521d70354SDave Airlie #include <drm/drmP.h> 3621d70354SDave Airlie #include <drm/drm_core.h> 3779190ea2SBenjamin Gaignard #include "drm_crtc_internal.h" 3821d70354SDave Airlie #include "drm_legacy.h" 3967d0ec4eSDaniel Vetter #include "drm_internal.h" 4081065548SDaniel Vetter #include "drm_crtc_internal.h" 4121d70354SDave Airlie 426dc3e22eSEzequiel Garcia /* 436dc3e22eSEzequiel Garcia * drm_debug: Enable debug output. 446dc3e22eSEzequiel Garcia * Bitmask of DRM_UT_x. See include/drm/drmP.h for details. 456dc3e22eSEzequiel Garcia */ 466dc3e22eSEzequiel Garcia unsigned int drm_debug = 0; 4721d70354SDave Airlie EXPORT_SYMBOL(drm_debug); 4821d70354SDave Airlie 4921d70354SDave Airlie MODULE_AUTHOR(CORE_AUTHOR); 5021d70354SDave Airlie MODULE_DESCRIPTION(CORE_DESC); 5121d70354SDave Airlie MODULE_LICENSE("GPL and additional rights"); 526dc3e22eSEzequiel Garcia MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug category.\n" 536dc3e22eSEzequiel Garcia "\t\tBit 0 (0x01) will enable CORE messages (drm core code)\n" 546dc3e22eSEzequiel Garcia "\t\tBit 1 (0x02) will enable DRIVER messages (drm controller code)\n" 556dc3e22eSEzequiel Garcia "\t\tBit 2 (0x04) will enable KMS messages (modesetting code)\n" 566dc3e22eSEzequiel Garcia "\t\tBit 3 (0x08) will enable PRIME messages (prime code)\n" 576dc3e22eSEzequiel Garcia "\t\tBit 4 (0x10) will enable ATOMIC messages (atomic code)\n" 586dc3e22eSEzequiel Garcia "\t\tBit 5 (0x20) will enable VBL messages (vblank code)"); 5921d70354SDave Airlie module_param_named(debug, drm_debug, int, 0600); 6021d70354SDave Airlie 6121d70354SDave Airlie static DEFINE_SPINLOCK(drm_minor_lock); 6221d70354SDave Airlie static struct idr drm_minors_idr; 6321d70354SDave Airlie 6421d70354SDave Airlie static struct dentry *drm_debugfs_root; 6521d70354SDave Airlie 66a1f1a79cSJoe Perches void drm_err(const char *format, ...) 6721d70354SDave Airlie { 6821d70354SDave Airlie struct va_format vaf; 6921d70354SDave Airlie va_list args; 7021d70354SDave Airlie 7121d70354SDave Airlie va_start(args, format); 7221d70354SDave Airlie 7321d70354SDave Airlie vaf.fmt = format; 7421d70354SDave Airlie vaf.va = &args; 7521d70354SDave Airlie 762ee762b3SScott Wood printk(KERN_ERR "[" DRM_NAME ":%ps] *ERROR* %pV", 77a1f1a79cSJoe Perches __builtin_return_address(0), &vaf); 7821d70354SDave Airlie 7921d70354SDave Airlie va_end(args); 8021d70354SDave Airlie } 8121d70354SDave Airlie EXPORT_SYMBOL(drm_err); 8221d70354SDave Airlie 8321d70354SDave Airlie void drm_ut_debug_printk(const char *function_name, const char *format, ...) 8421d70354SDave Airlie { 8521d70354SDave Airlie struct va_format vaf; 8621d70354SDave Airlie va_list args; 8721d70354SDave Airlie 8821d70354SDave Airlie va_start(args, format); 8921d70354SDave Airlie vaf.fmt = format; 9021d70354SDave Airlie vaf.va = &args; 9121d70354SDave Airlie 9221d70354SDave Airlie printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf); 9321d70354SDave Airlie 9421d70354SDave Airlie va_end(args); 9521d70354SDave Airlie } 9621d70354SDave Airlie EXPORT_SYMBOL(drm_ut_debug_printk); 9721d70354SDave Airlie 9821d70354SDave Airlie /* 9921d70354SDave Airlie * DRM Minors 10021d70354SDave Airlie * A DRM device can provide several char-dev interfaces on the DRM-Major. Each 10121d70354SDave Airlie * of them is represented by a drm_minor object. Depending on the capabilities 10221d70354SDave Airlie * of the device-driver, different interfaces are registered. 10321d70354SDave Airlie * 10421d70354SDave Airlie * Minors can be accessed via dev->$minor_name. This pointer is either 10521d70354SDave Airlie * NULL or a valid drm_minor pointer and stays valid as long as the device is 10621d70354SDave Airlie * valid. This means, DRM minors have the same life-time as the underlying 10721d70354SDave Airlie * device. However, this doesn't mean that the minor is active. Minors are 10821d70354SDave Airlie * registered and unregistered dynamically according to device-state. 10921d70354SDave Airlie */ 11021d70354SDave Airlie 11121d70354SDave Airlie static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, 11221d70354SDave Airlie unsigned int type) 11321d70354SDave Airlie { 11421d70354SDave Airlie switch (type) { 115a3ccc461SDavid Herrmann case DRM_MINOR_PRIMARY: 11621d70354SDave Airlie return &dev->primary; 11721d70354SDave Airlie case DRM_MINOR_RENDER: 11821d70354SDave Airlie return &dev->render; 11921d70354SDave Airlie case DRM_MINOR_CONTROL: 12021d70354SDave Airlie return &dev->control; 12121d70354SDave Airlie default: 12221d70354SDave Airlie return NULL; 12321d70354SDave Airlie } 12421d70354SDave Airlie } 12521d70354SDave Airlie 12621d70354SDave Airlie static int drm_minor_alloc(struct drm_device *dev, unsigned int type) 12721d70354SDave Airlie { 12821d70354SDave Airlie struct drm_minor *minor; 12921d70354SDave Airlie unsigned long flags; 13021d70354SDave Airlie int r; 13121d70354SDave Airlie 13221d70354SDave Airlie minor = kzalloc(sizeof(*minor), GFP_KERNEL); 13321d70354SDave Airlie if (!minor) 13421d70354SDave Airlie return -ENOMEM; 13521d70354SDave Airlie 13621d70354SDave Airlie minor->type = type; 13721d70354SDave Airlie minor->dev = dev; 13821d70354SDave Airlie 13921d70354SDave Airlie idr_preload(GFP_KERNEL); 14021d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 14121d70354SDave Airlie r = idr_alloc(&drm_minors_idr, 14221d70354SDave Airlie NULL, 14321d70354SDave Airlie 64 * type, 14421d70354SDave Airlie 64 * (type + 1), 14521d70354SDave Airlie GFP_NOWAIT); 14621d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 14721d70354SDave Airlie idr_preload_end(); 14821d70354SDave Airlie 14921d70354SDave Airlie if (r < 0) 15021d70354SDave Airlie goto err_free; 15121d70354SDave Airlie 15221d70354SDave Airlie minor->index = r; 15321d70354SDave Airlie 15421d70354SDave Airlie minor->kdev = drm_sysfs_minor_alloc(minor); 15521d70354SDave Airlie if (IS_ERR(minor->kdev)) { 15621d70354SDave Airlie r = PTR_ERR(minor->kdev); 15721d70354SDave Airlie goto err_index; 15821d70354SDave Airlie } 15921d70354SDave Airlie 16021d70354SDave Airlie *drm_minor_get_slot(dev, type) = minor; 16121d70354SDave Airlie return 0; 16221d70354SDave Airlie 16321d70354SDave Airlie err_index: 16421d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 16521d70354SDave Airlie idr_remove(&drm_minors_idr, minor->index); 16621d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 16721d70354SDave Airlie err_free: 16821d70354SDave Airlie kfree(minor); 16921d70354SDave Airlie return r; 17021d70354SDave Airlie } 17121d70354SDave Airlie 17221d70354SDave Airlie static void drm_minor_free(struct drm_device *dev, unsigned int type) 17321d70354SDave Airlie { 17421d70354SDave Airlie struct drm_minor **slot, *minor; 17521d70354SDave Airlie unsigned long flags; 17621d70354SDave Airlie 17721d70354SDave Airlie slot = drm_minor_get_slot(dev, type); 17821d70354SDave Airlie minor = *slot; 17921d70354SDave Airlie if (!minor) 18021d70354SDave Airlie return; 18121d70354SDave Airlie 18221d70354SDave Airlie put_device(minor->kdev); 18321d70354SDave Airlie 18421d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 18521d70354SDave Airlie idr_remove(&drm_minors_idr, minor->index); 18621d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 18721d70354SDave Airlie 18821d70354SDave Airlie kfree(minor); 18921d70354SDave Airlie *slot = NULL; 19021d70354SDave Airlie } 19121d70354SDave Airlie 19221d70354SDave Airlie static int drm_minor_register(struct drm_device *dev, unsigned int type) 19321d70354SDave Airlie { 19421d70354SDave Airlie struct drm_minor *minor; 19521d70354SDave Airlie unsigned long flags; 19621d70354SDave Airlie int ret; 19721d70354SDave Airlie 19821d70354SDave Airlie DRM_DEBUG("\n"); 19921d70354SDave Airlie 20021d70354SDave Airlie minor = *drm_minor_get_slot(dev, type); 20121d70354SDave Airlie if (!minor) 20221d70354SDave Airlie return 0; 20321d70354SDave Airlie 20421d70354SDave Airlie ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root); 20521d70354SDave Airlie if (ret) { 20621d70354SDave Airlie DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); 20721d70354SDave Airlie return ret; 20821d70354SDave Airlie } 20921d70354SDave Airlie 21021d70354SDave Airlie ret = device_add(minor->kdev); 21121d70354SDave Airlie if (ret) 21221d70354SDave Airlie goto err_debugfs; 21321d70354SDave Airlie 21421d70354SDave Airlie /* replace NULL with @minor so lookups will succeed from now on */ 21521d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 21621d70354SDave Airlie idr_replace(&drm_minors_idr, minor, minor->index); 21721d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 21821d70354SDave Airlie 21921d70354SDave Airlie DRM_DEBUG("new minor registered %d\n", minor->index); 22021d70354SDave Airlie return 0; 22121d70354SDave Airlie 22221d70354SDave Airlie err_debugfs: 22321d70354SDave Airlie drm_debugfs_cleanup(minor); 22421d70354SDave Airlie return ret; 22521d70354SDave Airlie } 22621d70354SDave Airlie 22721d70354SDave Airlie static void drm_minor_unregister(struct drm_device *dev, unsigned int type) 22821d70354SDave Airlie { 22921d70354SDave Airlie struct drm_minor *minor; 23021d70354SDave Airlie unsigned long flags; 23121d70354SDave Airlie 23221d70354SDave Airlie minor = *drm_minor_get_slot(dev, type); 23321d70354SDave Airlie if (!minor || !device_is_registered(minor->kdev)) 23421d70354SDave Airlie return; 23521d70354SDave Airlie 23621d70354SDave Airlie /* replace @minor with NULL so lookups will fail from now on */ 23721d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 23821d70354SDave Airlie idr_replace(&drm_minors_idr, NULL, minor->index); 23921d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 24021d70354SDave Airlie 24121d70354SDave Airlie device_del(minor->kdev); 24221d70354SDave Airlie dev_set_drvdata(minor->kdev, NULL); /* safety belt */ 24321d70354SDave Airlie drm_debugfs_cleanup(minor); 24421d70354SDave Airlie } 24521d70354SDave Airlie 24621d70354SDave Airlie /** 24721d70354SDave Airlie * drm_minor_acquire - Acquire a DRM minor 24821d70354SDave Airlie * @minor_id: Minor ID of the DRM-minor 24921d70354SDave Airlie * 25021d70354SDave Airlie * Looks up the given minor-ID and returns the respective DRM-minor object. The 25121d70354SDave Airlie * refence-count of the underlying device is increased so you must release this 25221d70354SDave Airlie * object with drm_minor_release(). 25321d70354SDave Airlie * 25421d70354SDave Airlie * As long as you hold this minor, it is guaranteed that the object and the 25521d70354SDave Airlie * minor->dev pointer will stay valid! However, the device may get unplugged and 25621d70354SDave Airlie * unregistered while you hold the minor. 25721d70354SDave Airlie * 25821d70354SDave Airlie * Returns: 25921d70354SDave Airlie * Pointer to minor-object with increased device-refcount, or PTR_ERR on 26021d70354SDave Airlie * failure. 26121d70354SDave Airlie */ 26221d70354SDave Airlie struct drm_minor *drm_minor_acquire(unsigned int minor_id) 26321d70354SDave Airlie { 26421d70354SDave Airlie struct drm_minor *minor; 26521d70354SDave Airlie unsigned long flags; 26621d70354SDave Airlie 26721d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 26821d70354SDave Airlie minor = idr_find(&drm_minors_idr, minor_id); 26921d70354SDave Airlie if (minor) 27021d70354SDave Airlie drm_dev_ref(minor->dev); 27121d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 27221d70354SDave Airlie 27321d70354SDave Airlie if (!minor) { 27421d70354SDave Airlie return ERR_PTR(-ENODEV); 27521d70354SDave Airlie } else if (drm_device_is_unplugged(minor->dev)) { 27621d70354SDave Airlie drm_dev_unref(minor->dev); 27721d70354SDave Airlie return ERR_PTR(-ENODEV); 27821d70354SDave Airlie } 27921d70354SDave Airlie 28021d70354SDave Airlie return minor; 28121d70354SDave Airlie } 28221d70354SDave Airlie 28321d70354SDave Airlie /** 28421d70354SDave Airlie * drm_minor_release - Release DRM minor 28521d70354SDave Airlie * @minor: Pointer to DRM minor object 28621d70354SDave Airlie * 28721d70354SDave Airlie * Release a minor that was previously acquired via drm_minor_acquire(). 28821d70354SDave Airlie */ 28921d70354SDave Airlie void drm_minor_release(struct drm_minor *minor) 29021d70354SDave Airlie { 29121d70354SDave Airlie drm_dev_unref(minor->dev); 29221d70354SDave Airlie } 29321d70354SDave Airlie 29421d70354SDave Airlie /** 2956e3f797cSDaniel Vetter * DOC: driver instance overview 2966e3f797cSDaniel Vetter * 2976e3f797cSDaniel Vetter * A device instance for a drm driver is represented by struct &drm_device. This 2986e3f797cSDaniel Vetter * is allocated with drm_dev_alloc(), usually from bus-specific ->probe() 2996e3f797cSDaniel Vetter * callbacks implemented by the driver. The driver then needs to initialize all 3006e3f797cSDaniel Vetter * the various subsystems for the drm device like memory management, vblank 3016e3f797cSDaniel Vetter * handling, modesetting support and intial output configuration plus obviously 302a742946aSDaniel Vetter * initialize all the corresponding hardware bits. Finally when everything is up 303a742946aSDaniel Vetter * and running and ready for userspace the device instance can be published 304a742946aSDaniel Vetter * using drm_dev_register(). 3056e3f797cSDaniel Vetter * 3066e3f797cSDaniel Vetter * There is also deprecated support for initalizing device instances using 3076e3f797cSDaniel Vetter * bus-specific helpers and the ->load() callback. But due to 3086e3f797cSDaniel Vetter * backwards-compatibility needs the device instance have to be published too 3096e3f797cSDaniel Vetter * early, which requires unpretty global locking to make safe and is therefore 3106e3f797cSDaniel Vetter * only support for existing drivers not yet converted to the new scheme. 3116e3f797cSDaniel Vetter * 3126e3f797cSDaniel Vetter * When cleaning up a device instance everything needs to be done in reverse: 3136e3f797cSDaniel Vetter * First unpublish the device instance with drm_dev_unregister(). Then clean up 3146e3f797cSDaniel Vetter * any other resources allocated at device initialization and drop the driver's 3156e3f797cSDaniel Vetter * reference to &drm_device using drm_dev_unref(). 3166e3f797cSDaniel Vetter * 3176e3f797cSDaniel Vetter * Note that the lifetime rules for &drm_device instance has still a lot of 3186e3f797cSDaniel Vetter * historical baggage. Hence use the reference counting provided by 3196e3f797cSDaniel Vetter * drm_dev_ref() and drm_dev_unref() only carefully. 3206e3f797cSDaniel Vetter * 3216e3f797cSDaniel Vetter * Also note that embedding of &drm_device is currently not (yet) supported (but 3226e3f797cSDaniel Vetter * it would be easy to add). Drivers can store driver-private data in the 3236e3f797cSDaniel Vetter * dev_priv field of &drm_device. 3246e3f797cSDaniel Vetter */ 3256e3f797cSDaniel Vetter 326a742946aSDaniel Vetter static int drm_dev_set_unique(struct drm_device *dev, const char *name) 327a742946aSDaniel Vetter { 328a742946aSDaniel Vetter kfree(dev->unique); 329a742946aSDaniel Vetter dev->unique = kstrdup(name, GFP_KERNEL); 330a742946aSDaniel Vetter 331a742946aSDaniel Vetter return dev->unique ? 0 : -ENOMEM; 332a742946aSDaniel Vetter } 333a742946aSDaniel Vetter 3346e3f797cSDaniel Vetter /** 33521d70354SDave Airlie * drm_put_dev - Unregister and release a DRM device 33621d70354SDave Airlie * @dev: DRM device 33721d70354SDave Airlie * 33821d70354SDave Airlie * Called at module unload time or when a PCI device is unplugged. 33921d70354SDave Airlie * 34021d70354SDave Airlie * Cleans up all DRM device, calling drm_lastclose(). 3416e3f797cSDaniel Vetter * 3426e3f797cSDaniel Vetter * Note: Use of this function is deprecated. It will eventually go away 3436e3f797cSDaniel Vetter * completely. Please use drm_dev_unregister() and drm_dev_unref() explicitly 3446e3f797cSDaniel Vetter * instead to make sure that the device isn't userspace accessible any more 3456e3f797cSDaniel Vetter * while teardown is in progress, ensuring that userspace can't access an 3466e3f797cSDaniel Vetter * inconsistent state. 34721d70354SDave Airlie */ 34821d70354SDave Airlie void drm_put_dev(struct drm_device *dev) 34921d70354SDave Airlie { 35021d70354SDave Airlie DRM_DEBUG("\n"); 35121d70354SDave Airlie 35221d70354SDave Airlie if (!dev) { 35321d70354SDave Airlie DRM_ERROR("cleanup called no dev\n"); 35421d70354SDave Airlie return; 35521d70354SDave Airlie } 35621d70354SDave Airlie 35721d70354SDave Airlie drm_dev_unregister(dev); 35821d70354SDave Airlie drm_dev_unref(dev); 35921d70354SDave Airlie } 36021d70354SDave Airlie EXPORT_SYMBOL(drm_put_dev); 36121d70354SDave Airlie 36221d70354SDave Airlie void drm_unplug_dev(struct drm_device *dev) 36321d70354SDave Airlie { 36421d70354SDave Airlie /* for a USB device */ 365a39be606SChris Wilson drm_dev_unregister(dev); 36621d70354SDave Airlie 36721d70354SDave Airlie mutex_lock(&drm_global_mutex); 36821d70354SDave Airlie 36921d70354SDave Airlie drm_device_set_unplugged(dev); 37021d70354SDave Airlie 37121d70354SDave Airlie if (dev->open_count == 0) { 37221d70354SDave Airlie drm_put_dev(dev); 37321d70354SDave Airlie } 37421d70354SDave Airlie mutex_unlock(&drm_global_mutex); 37521d70354SDave Airlie } 37621d70354SDave Airlie EXPORT_SYMBOL(drm_unplug_dev); 37721d70354SDave Airlie 37821d70354SDave Airlie /* 37921d70354SDave Airlie * DRM internal mount 38021d70354SDave Airlie * We want to be able to allocate our own "struct address_space" to control 38121d70354SDave Airlie * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow 38221d70354SDave Airlie * stand-alone address_space objects, so we need an underlying inode. As there 38321d70354SDave Airlie * is no way to allocate an independent inode easily, we need a fake internal 38421d70354SDave Airlie * VFS mount-point. 38521d70354SDave Airlie * 38621d70354SDave Airlie * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() 38721d70354SDave Airlie * frees it again. You are allowed to use iget() and iput() to get references to 38821d70354SDave Airlie * the inode. But each drm_fs_inode_new() call must be paired with exactly one 38921d70354SDave Airlie * drm_fs_inode_free() call (which does not have to be the last iput()). 39021d70354SDave Airlie * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it 39121d70354SDave Airlie * between multiple inode-users. You could, technically, call 39221d70354SDave Airlie * iget() + drm_fs_inode_free() directly after alloc and sometime later do an 39321d70354SDave Airlie * iput(), but this way you'd end up with a new vfsmount for each inode. 39421d70354SDave Airlie */ 39521d70354SDave Airlie 39621d70354SDave Airlie static int drm_fs_cnt; 39721d70354SDave Airlie static struct vfsmount *drm_fs_mnt; 39821d70354SDave Airlie 39921d70354SDave Airlie static const struct dentry_operations drm_fs_dops = { 40021d70354SDave Airlie .d_dname = simple_dname, 40121d70354SDave Airlie }; 40221d70354SDave Airlie 40321d70354SDave Airlie static const struct super_operations drm_fs_sops = { 40421d70354SDave Airlie .statfs = simple_statfs, 40521d70354SDave Airlie }; 40621d70354SDave Airlie 40721d70354SDave Airlie static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, 40821d70354SDave Airlie const char *dev_name, void *data) 40921d70354SDave Airlie { 41021d70354SDave Airlie return mount_pseudo(fs_type, 41121d70354SDave Airlie "drm:", 41221d70354SDave Airlie &drm_fs_sops, 41321d70354SDave Airlie &drm_fs_dops, 41421d70354SDave Airlie 0x010203ff); 41521d70354SDave Airlie } 41621d70354SDave Airlie 41721d70354SDave Airlie static struct file_system_type drm_fs_type = { 41821d70354SDave Airlie .name = "drm", 41921d70354SDave Airlie .owner = THIS_MODULE, 42021d70354SDave Airlie .mount = drm_fs_mount, 42121d70354SDave Airlie .kill_sb = kill_anon_super, 42221d70354SDave Airlie }; 42321d70354SDave Airlie 42421d70354SDave Airlie static struct inode *drm_fs_inode_new(void) 42521d70354SDave Airlie { 42621d70354SDave Airlie struct inode *inode; 42721d70354SDave Airlie int r; 42821d70354SDave Airlie 42921d70354SDave Airlie r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); 43021d70354SDave Airlie if (r < 0) { 43121d70354SDave Airlie DRM_ERROR("Cannot mount pseudo fs: %d\n", r); 43221d70354SDave Airlie return ERR_PTR(r); 43321d70354SDave Airlie } 43421d70354SDave Airlie 43521d70354SDave Airlie inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); 43621d70354SDave Airlie if (IS_ERR(inode)) 43721d70354SDave Airlie simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); 43821d70354SDave Airlie 43921d70354SDave Airlie return inode; 44021d70354SDave Airlie } 44121d70354SDave Airlie 44221d70354SDave Airlie static void drm_fs_inode_free(struct inode *inode) 44321d70354SDave Airlie { 44421d70354SDave Airlie if (inode) { 44521d70354SDave Airlie iput(inode); 44621d70354SDave Airlie simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); 44721d70354SDave Airlie } 44821d70354SDave Airlie } 44921d70354SDave Airlie 45021d70354SDave Airlie /** 451b209aca3SChris Wilson * drm_dev_init - Initialise new DRM device 452b209aca3SChris Wilson * @dev: DRM device 453b209aca3SChris Wilson * @driver: DRM driver 45421d70354SDave Airlie * @parent: Parent device object 45521d70354SDave Airlie * 456b209aca3SChris Wilson * Initialize a new DRM device. No device registration is done. 45721d70354SDave Airlie * Call drm_dev_register() to advertice the device to user space and register it 4586e3f797cSDaniel Vetter * with other core subsystems. This should be done last in the device 4596e3f797cSDaniel Vetter * initialization sequence to make sure userspace can't access an inconsistent 4606e3f797cSDaniel Vetter * state. 46121d70354SDave Airlie * 46221d70354SDave Airlie * The initial ref-count of the object is 1. Use drm_dev_ref() and 46321d70354SDave Airlie * drm_dev_unref() to take and drop further ref-counts. 46421d70354SDave Airlie * 465b0ff4b93SDaniel Vetter * Note that for purely virtual devices @parent can be NULL. 466b0ff4b93SDaniel Vetter * 467b209aca3SChris Wilson * Drivers that do not want to allocate their own device struct 468b209aca3SChris Wilson * embedding struct &drm_device can call drm_dev_alloc() instead. 469b209aca3SChris Wilson * 47021d70354SDave Airlie * RETURNS: 471b209aca3SChris Wilson * 0 on success, or error code on failure. 47221d70354SDave Airlie */ 473b209aca3SChris Wilson int drm_dev_init(struct drm_device *dev, 474b209aca3SChris Wilson struct drm_driver *driver, 47521d70354SDave Airlie struct device *parent) 47621d70354SDave Airlie { 47721d70354SDave Airlie int ret; 47821d70354SDave Airlie 47921d70354SDave Airlie kref_init(&dev->ref); 48021d70354SDave Airlie dev->dev = parent; 48121d70354SDave Airlie dev->driver = driver; 48221d70354SDave Airlie 48321d70354SDave Airlie INIT_LIST_HEAD(&dev->filelist); 48421d70354SDave Airlie INIT_LIST_HEAD(&dev->ctxlist); 48521d70354SDave Airlie INIT_LIST_HEAD(&dev->vmalist); 48621d70354SDave Airlie INIT_LIST_HEAD(&dev->maplist); 48721d70354SDave Airlie INIT_LIST_HEAD(&dev->vblank_event_list); 48821d70354SDave Airlie 48921d70354SDave Airlie spin_lock_init(&dev->buf_lock); 49021d70354SDave Airlie spin_lock_init(&dev->event_lock); 49121d70354SDave Airlie mutex_init(&dev->struct_mutex); 4921d2ac403SDaniel Vetter mutex_init(&dev->filelist_mutex); 49321d70354SDave Airlie mutex_init(&dev->ctxlist_mutex); 49421d70354SDave Airlie mutex_init(&dev->master_mutex); 49521d70354SDave Airlie 49621d70354SDave Airlie dev->anon_inode = drm_fs_inode_new(); 49721d70354SDave Airlie if (IS_ERR(dev->anon_inode)) { 49821d70354SDave Airlie ret = PTR_ERR(dev->anon_inode); 49921d70354SDave Airlie DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); 50021d70354SDave Airlie goto err_free; 50121d70354SDave Airlie } 50221d70354SDave Airlie 50321d70354SDave Airlie if (drm_core_check_feature(dev, DRIVER_MODESET)) { 50421d70354SDave Airlie ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); 50521d70354SDave Airlie if (ret) 50621d70354SDave Airlie goto err_minors; 50721d70354SDave Airlie } 50821d70354SDave Airlie 50921d70354SDave Airlie if (drm_core_check_feature(dev, DRIVER_RENDER)) { 51021d70354SDave Airlie ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); 51121d70354SDave Airlie if (ret) 51221d70354SDave Airlie goto err_minors; 51321d70354SDave Airlie } 51421d70354SDave Airlie 515a3ccc461SDavid Herrmann ret = drm_minor_alloc(dev, DRM_MINOR_PRIMARY); 51621d70354SDave Airlie if (ret) 51721d70354SDave Airlie goto err_minors; 51821d70354SDave Airlie 519b209aca3SChris Wilson ret = drm_ht_create(&dev->map_hash, 12); 520b209aca3SChris Wilson if (ret) 52121d70354SDave Airlie goto err_minors; 52221d70354SDave Airlie 523ba6976c1SDaniel Vetter drm_legacy_ctxbitmap_init(dev); 52421d70354SDave Airlie 5251bcecfacSAndrzej Hajda if (drm_core_check_feature(dev, DRIVER_GEM)) { 52621d70354SDave Airlie ret = drm_gem_init(dev); 52721d70354SDave Airlie if (ret) { 52821d70354SDave Airlie DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); 52921d70354SDave Airlie goto err_ctxbitmap; 53021d70354SDave Airlie } 53121d70354SDave Airlie } 53221d70354SDave Airlie 5335079c464SDaniel Vetter /* Use the parent device name as DRM device unique identifier, but fall 5345079c464SDaniel Vetter * back to the driver name for virtual devices like vgem. */ 5355079c464SDaniel Vetter ret = drm_dev_set_unique(dev, parent ? dev_name(parent) : driver->name); 536e112e593SNicolas Iooss if (ret) 537e112e593SNicolas Iooss goto err_setunique; 538e112e593SNicolas Iooss 539b209aca3SChris Wilson return 0; 54021d70354SDave Airlie 541e112e593SNicolas Iooss err_setunique: 542e112e593SNicolas Iooss if (drm_core_check_feature(dev, DRIVER_GEM)) 543e112e593SNicolas Iooss drm_gem_destroy(dev); 54421d70354SDave Airlie err_ctxbitmap: 54521d70354SDave Airlie drm_legacy_ctxbitmap_cleanup(dev); 54621d70354SDave Airlie drm_ht_remove(&dev->map_hash); 54721d70354SDave Airlie err_minors: 548a3ccc461SDavid Herrmann drm_minor_free(dev, DRM_MINOR_PRIMARY); 54921d70354SDave Airlie drm_minor_free(dev, DRM_MINOR_RENDER); 55021d70354SDave Airlie drm_minor_free(dev, DRM_MINOR_CONTROL); 55121d70354SDave Airlie drm_fs_inode_free(dev->anon_inode); 55221d70354SDave Airlie err_free: 55321d70354SDave Airlie mutex_destroy(&dev->master_mutex); 554b209aca3SChris Wilson return ret; 555b209aca3SChris Wilson } 556b209aca3SChris Wilson EXPORT_SYMBOL(drm_dev_init); 557b209aca3SChris Wilson 558b209aca3SChris Wilson /** 559b209aca3SChris Wilson * drm_dev_alloc - Allocate new DRM device 560b209aca3SChris Wilson * @driver: DRM driver to allocate device for 561b209aca3SChris Wilson * @parent: Parent device object 562b209aca3SChris Wilson * 563b209aca3SChris Wilson * Allocate and initialize a new DRM device. No device registration is done. 564b209aca3SChris Wilson * Call drm_dev_register() to advertice the device to user space and register it 565b209aca3SChris Wilson * with other core subsystems. This should be done last in the device 566b209aca3SChris Wilson * initialization sequence to make sure userspace can't access an inconsistent 567b209aca3SChris Wilson * state. 568b209aca3SChris Wilson * 569b209aca3SChris Wilson * The initial ref-count of the object is 1. Use drm_dev_ref() and 570b209aca3SChris Wilson * drm_dev_unref() to take and drop further ref-counts. 571b209aca3SChris Wilson * 572b209aca3SChris Wilson * Note that for purely virtual devices @parent can be NULL. 573b209aca3SChris Wilson * 574b209aca3SChris Wilson * Drivers that wish to subclass or embed struct &drm_device into their 575b209aca3SChris Wilson * own struct should look at using drm_dev_init() instead. 576b209aca3SChris Wilson * 577b209aca3SChris Wilson * RETURNS: 578b209aca3SChris Wilson * Pointer to new DRM device, or NULL if out of memory. 579b209aca3SChris Wilson */ 580b209aca3SChris Wilson struct drm_device *drm_dev_alloc(struct drm_driver *driver, 581b209aca3SChris Wilson struct device *parent) 582b209aca3SChris Wilson { 583b209aca3SChris Wilson struct drm_device *dev; 584b209aca3SChris Wilson int ret; 585b209aca3SChris Wilson 586b209aca3SChris Wilson dev = kzalloc(sizeof(*dev), GFP_KERNEL); 587b209aca3SChris Wilson if (!dev) 588b209aca3SChris Wilson return NULL; 589b209aca3SChris Wilson 590b209aca3SChris Wilson ret = drm_dev_init(dev, driver, parent); 591b209aca3SChris Wilson if (ret) { 59221d70354SDave Airlie kfree(dev); 59321d70354SDave Airlie return NULL; 59421d70354SDave Airlie } 595b209aca3SChris Wilson 596b209aca3SChris Wilson return dev; 597b209aca3SChris Wilson } 59821d70354SDave Airlie EXPORT_SYMBOL(drm_dev_alloc); 59921d70354SDave Airlie 60021d70354SDave Airlie static void drm_dev_release(struct kref *ref) 60121d70354SDave Airlie { 60221d70354SDave Airlie struct drm_device *dev = container_of(ref, struct drm_device, ref); 60321d70354SDave Airlie 6041bcecfacSAndrzej Hajda if (drm_core_check_feature(dev, DRIVER_GEM)) 60521d70354SDave Airlie drm_gem_destroy(dev); 60621d70354SDave Airlie 60721d70354SDave Airlie drm_legacy_ctxbitmap_cleanup(dev); 60821d70354SDave Airlie drm_ht_remove(&dev->map_hash); 60921d70354SDave Airlie drm_fs_inode_free(dev->anon_inode); 61021d70354SDave Airlie 611a3ccc461SDavid Herrmann drm_minor_free(dev, DRM_MINOR_PRIMARY); 61221d70354SDave Airlie drm_minor_free(dev, DRM_MINOR_RENDER); 61321d70354SDave Airlie drm_minor_free(dev, DRM_MINOR_CONTROL); 61421d70354SDave Airlie 61521d70354SDave Airlie mutex_destroy(&dev->master_mutex); 61621d70354SDave Airlie kfree(dev->unique); 61721d70354SDave Airlie kfree(dev); 61821d70354SDave Airlie } 61921d70354SDave Airlie 62021d70354SDave Airlie /** 62121d70354SDave Airlie * drm_dev_ref - Take reference of a DRM device 62221d70354SDave Airlie * @dev: device to take reference of or NULL 62321d70354SDave Airlie * 62421d70354SDave Airlie * This increases the ref-count of @dev by one. You *must* already own a 62521d70354SDave Airlie * reference when calling this. Use drm_dev_unref() to drop this reference 62621d70354SDave Airlie * again. 62721d70354SDave Airlie * 62821d70354SDave Airlie * This function never fails. However, this function does not provide *any* 62921d70354SDave Airlie * guarantee whether the device is alive or running. It only provides a 63021d70354SDave Airlie * reference to the object and the memory associated with it. 63121d70354SDave Airlie */ 63221d70354SDave Airlie void drm_dev_ref(struct drm_device *dev) 63321d70354SDave Airlie { 63421d70354SDave Airlie if (dev) 63521d70354SDave Airlie kref_get(&dev->ref); 63621d70354SDave Airlie } 63721d70354SDave Airlie EXPORT_SYMBOL(drm_dev_ref); 63821d70354SDave Airlie 63921d70354SDave Airlie /** 64021d70354SDave Airlie * drm_dev_unref - Drop reference of a DRM device 64121d70354SDave Airlie * @dev: device to drop reference of or NULL 64221d70354SDave Airlie * 64321d70354SDave Airlie * This decreases the ref-count of @dev by one. The device is destroyed if the 64421d70354SDave Airlie * ref-count drops to zero. 64521d70354SDave Airlie */ 64621d70354SDave Airlie void drm_dev_unref(struct drm_device *dev) 64721d70354SDave Airlie { 64821d70354SDave Airlie if (dev) 64921d70354SDave Airlie kref_put(&dev->ref, drm_dev_release); 65021d70354SDave Airlie } 65121d70354SDave Airlie EXPORT_SYMBOL(drm_dev_unref); 65221d70354SDave Airlie 65321d70354SDave Airlie /** 65421d70354SDave Airlie * drm_dev_register - Register DRM device 65521d70354SDave Airlie * @dev: Device to register 65621d70354SDave Airlie * @flags: Flags passed to the driver's .load() function 65721d70354SDave Airlie * 65821d70354SDave Airlie * Register the DRM device @dev with the system, advertise device to user-space 65921d70354SDave Airlie * and start normal device operation. @dev must be allocated via drm_dev_alloc() 660e28cd4d0SChris Wilson * previously. 66121d70354SDave Airlie * 66221d70354SDave Airlie * Never call this twice on any device! 66321d70354SDave Airlie * 6646e3f797cSDaniel Vetter * NOTE: To ensure backward compatibility with existing drivers method this 6656e3f797cSDaniel Vetter * function calls the ->load() method after registering the device nodes, 6666e3f797cSDaniel Vetter * creating race conditions. Usage of the ->load() methods is therefore 6676e3f797cSDaniel Vetter * deprecated, drivers must perform all initialization before calling 6686e3f797cSDaniel Vetter * drm_dev_register(). 6696e3f797cSDaniel Vetter * 67021d70354SDave Airlie * RETURNS: 67121d70354SDave Airlie * 0 on success, negative error code on failure. 67221d70354SDave Airlie */ 67321d70354SDave Airlie int drm_dev_register(struct drm_device *dev, unsigned long flags) 67421d70354SDave Airlie { 67521d70354SDave Airlie int ret; 67621d70354SDave Airlie 67721d70354SDave Airlie mutex_lock(&drm_global_mutex); 67821d70354SDave Airlie 67921d70354SDave Airlie ret = drm_minor_register(dev, DRM_MINOR_CONTROL); 68021d70354SDave Airlie if (ret) 68121d70354SDave Airlie goto err_minors; 68221d70354SDave Airlie 68321d70354SDave Airlie ret = drm_minor_register(dev, DRM_MINOR_RENDER); 68421d70354SDave Airlie if (ret) 68521d70354SDave Airlie goto err_minors; 68621d70354SDave Airlie 687a3ccc461SDavid Herrmann ret = drm_minor_register(dev, DRM_MINOR_PRIMARY); 68821d70354SDave Airlie if (ret) 68921d70354SDave Airlie goto err_minors; 69021d70354SDave Airlie 69121d70354SDave Airlie if (dev->driver->load) { 69221d70354SDave Airlie ret = dev->driver->load(dev, flags); 69321d70354SDave Airlie if (ret) 69421d70354SDave Airlie goto err_minors; 69521d70354SDave Airlie } 69621d70354SDave Airlie 697bee7fb15SChris Wilson if (drm_core_check_feature(dev, DRIVER_MODESET)) 69879190ea2SBenjamin Gaignard drm_modeset_register_all(dev); 699e28cd4d0SChris Wilson 70021d70354SDave Airlie ret = 0; 70121d70354SDave Airlie goto out_unlock; 70221d70354SDave Airlie 70321d70354SDave Airlie err_minors: 704a3ccc461SDavid Herrmann drm_minor_unregister(dev, DRM_MINOR_PRIMARY); 70521d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_RENDER); 70621d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_CONTROL); 70721d70354SDave Airlie out_unlock: 70821d70354SDave Airlie mutex_unlock(&drm_global_mutex); 70921d70354SDave Airlie return ret; 71021d70354SDave Airlie } 71121d70354SDave Airlie EXPORT_SYMBOL(drm_dev_register); 71221d70354SDave Airlie 71321d70354SDave Airlie /** 71421d70354SDave Airlie * drm_dev_unregister - Unregister DRM device 71521d70354SDave Airlie * @dev: Device to unregister 71621d70354SDave Airlie * 71721d70354SDave Airlie * Unregister the DRM device from the system. This does the reverse of 71821d70354SDave Airlie * drm_dev_register() but does not deallocate the device. The caller must call 71921d70354SDave Airlie * drm_dev_unref() to drop their final reference. 7206e3f797cSDaniel Vetter * 7216e3f797cSDaniel Vetter * This should be called first in the device teardown code to make sure 7226e3f797cSDaniel Vetter * userspace can't access the device instance any more. 72321d70354SDave Airlie */ 72421d70354SDave Airlie void drm_dev_unregister(struct drm_device *dev) 72521d70354SDave Airlie { 72621d70354SDave Airlie struct drm_map_list *r_list, *list_temp; 72721d70354SDave Airlie 72821d70354SDave Airlie drm_lastclose(dev); 72921d70354SDave Airlie 730bee7fb15SChris Wilson if (drm_core_check_feature(dev, DRIVER_MODESET)) 73179190ea2SBenjamin Gaignard drm_modeset_unregister_all(dev); 732e28cd4d0SChris Wilson 73321d70354SDave Airlie if (dev->driver->unload) 73421d70354SDave Airlie dev->driver->unload(dev); 73521d70354SDave Airlie 73621d70354SDave Airlie if (dev->agp) 73721d70354SDave Airlie drm_pci_agp_destroy(dev); 73821d70354SDave Airlie 73921d70354SDave Airlie drm_vblank_cleanup(dev); 74021d70354SDave Airlie 74121d70354SDave Airlie list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) 7429fc5cde7SDavid Herrmann drm_legacy_rmmap(dev, r_list->map); 74321d70354SDave Airlie 744a3ccc461SDavid Herrmann drm_minor_unregister(dev, DRM_MINOR_PRIMARY); 74521d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_RENDER); 74621d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_CONTROL); 74721d70354SDave Airlie } 74821d70354SDave Airlie EXPORT_SYMBOL(drm_dev_unregister); 74921d70354SDave Airlie 75021d70354SDave Airlie /* 75121d70354SDave Airlie * DRM Core 75221d70354SDave Airlie * The DRM core module initializes all global DRM objects and makes them 75321d70354SDave Airlie * available to drivers. Once setup, drivers can probe their respective 75421d70354SDave Airlie * devices. 75521d70354SDave Airlie * Currently, core management includes: 75621d70354SDave Airlie * - The "DRM-Global" key/value database 75721d70354SDave Airlie * - Global ID management for connectors 75821d70354SDave Airlie * - DRM major number allocation 75921d70354SDave Airlie * - DRM minor management 76021d70354SDave Airlie * - DRM sysfs class 76121d70354SDave Airlie * - DRM debugfs root 76221d70354SDave Airlie * 76321d70354SDave Airlie * Furthermore, the DRM core provides dynamic char-dev lookups. For each 76421d70354SDave Airlie * interface registered on a DRM device, you can request minor numbers from DRM 76521d70354SDave Airlie * core. DRM core takes care of major-number management and char-dev 76621d70354SDave Airlie * registration. A stub ->open() callback forwards any open() requests to the 76721d70354SDave Airlie * registered minor. 76821d70354SDave Airlie */ 76921d70354SDave Airlie 77021d70354SDave Airlie static int drm_stub_open(struct inode *inode, struct file *filp) 77121d70354SDave Airlie { 77221d70354SDave Airlie const struct file_operations *new_fops; 77321d70354SDave Airlie struct drm_minor *minor; 77421d70354SDave Airlie int err; 77521d70354SDave Airlie 77621d70354SDave Airlie DRM_DEBUG("\n"); 77721d70354SDave Airlie 77821d70354SDave Airlie mutex_lock(&drm_global_mutex); 77921d70354SDave Airlie minor = drm_minor_acquire(iminor(inode)); 78021d70354SDave Airlie if (IS_ERR(minor)) { 78121d70354SDave Airlie err = PTR_ERR(minor); 78221d70354SDave Airlie goto out_unlock; 78321d70354SDave Airlie } 78421d70354SDave Airlie 78521d70354SDave Airlie new_fops = fops_get(minor->dev->driver->fops); 78621d70354SDave Airlie if (!new_fops) { 78721d70354SDave Airlie err = -ENODEV; 78821d70354SDave Airlie goto out_release; 78921d70354SDave Airlie } 79021d70354SDave Airlie 79121d70354SDave Airlie replace_fops(filp, new_fops); 79221d70354SDave Airlie if (filp->f_op->open) 79321d70354SDave Airlie err = filp->f_op->open(inode, filp); 79421d70354SDave Airlie else 79521d70354SDave Airlie err = 0; 79621d70354SDave Airlie 79721d70354SDave Airlie out_release: 79821d70354SDave Airlie drm_minor_release(minor); 79921d70354SDave Airlie out_unlock: 80021d70354SDave Airlie mutex_unlock(&drm_global_mutex); 80121d70354SDave Airlie return err; 80221d70354SDave Airlie } 80321d70354SDave Airlie 80421d70354SDave Airlie static const struct file_operations drm_stub_fops = { 80521d70354SDave Airlie .owner = THIS_MODULE, 80621d70354SDave Airlie .open = drm_stub_open, 80721d70354SDave Airlie .llseek = noop_llseek, 80821d70354SDave Airlie }; 80921d70354SDave Airlie 81021d70354SDave Airlie static int __init drm_core_init(void) 81121d70354SDave Airlie { 81221d70354SDave Airlie int ret = -ENOMEM; 81321d70354SDave Airlie 81421d70354SDave Airlie drm_global_init(); 81521d70354SDave Airlie drm_connector_ida_init(); 81621d70354SDave Airlie idr_init(&drm_minors_idr); 81721d70354SDave Airlie 81821d70354SDave Airlie if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) 81921d70354SDave Airlie goto err_p1; 82021d70354SDave Airlie 821fcc90213SDavid Herrmann ret = drm_sysfs_init(); 822fcc90213SDavid Herrmann if (ret < 0) { 82321d70354SDave Airlie printk(KERN_ERR "DRM: Error creating drm class.\n"); 82421d70354SDave Airlie goto err_p2; 82521d70354SDave Airlie } 82621d70354SDave Airlie 82721d70354SDave Airlie drm_debugfs_root = debugfs_create_dir("dri", NULL); 82821d70354SDave Airlie if (!drm_debugfs_root) { 82921d70354SDave Airlie DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); 83021d70354SDave Airlie ret = -1; 83121d70354SDave Airlie goto err_p3; 83221d70354SDave Airlie } 83321d70354SDave Airlie 83421d70354SDave Airlie DRM_INFO("Initialized %s %d.%d.%d %s\n", 83521d70354SDave Airlie CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); 83621d70354SDave Airlie return 0; 83721d70354SDave Airlie err_p3: 83821d70354SDave Airlie drm_sysfs_destroy(); 83921d70354SDave Airlie err_p2: 84021d70354SDave Airlie unregister_chrdev(DRM_MAJOR, "drm"); 84121d70354SDave Airlie 84221d70354SDave Airlie idr_destroy(&drm_minors_idr); 84321d70354SDave Airlie err_p1: 84421d70354SDave Airlie return ret; 84521d70354SDave Airlie } 84621d70354SDave Airlie 84721d70354SDave Airlie static void __exit drm_core_exit(void) 84821d70354SDave Airlie { 84921d70354SDave Airlie debugfs_remove(drm_debugfs_root); 85021d70354SDave Airlie drm_sysfs_destroy(); 85121d70354SDave Airlie 85221d70354SDave Airlie unregister_chrdev(DRM_MAJOR, "drm"); 85321d70354SDave Airlie 85421d70354SDave Airlie drm_connector_ida_destroy(); 85521d70354SDave Airlie idr_destroy(&drm_minors_idr); 85621d70354SDave Airlie } 85721d70354SDave Airlie 85821d70354SDave Airlie module_init(drm_core_init); 85921d70354SDave Airlie module_exit(drm_core_exit); 860