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> 3721d70354SDave Airlie #include "drm_legacy.h" 3867d0ec4eSDaniel Vetter #include "drm_internal.h" 3921d70354SDave Airlie 406dc3e22eSEzequiel Garcia /* 416dc3e22eSEzequiel Garcia * drm_debug: Enable debug output. 426dc3e22eSEzequiel Garcia * Bitmask of DRM_UT_x. See include/drm/drmP.h for details. 436dc3e22eSEzequiel Garcia */ 446dc3e22eSEzequiel Garcia unsigned int drm_debug = 0; 4521d70354SDave Airlie EXPORT_SYMBOL(drm_debug); 4621d70354SDave Airlie 4721d70354SDave Airlie MODULE_AUTHOR(CORE_AUTHOR); 4821d70354SDave Airlie MODULE_DESCRIPTION(CORE_DESC); 4921d70354SDave Airlie MODULE_LICENSE("GPL and additional rights"); 506dc3e22eSEzequiel Garcia MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug category.\n" 516dc3e22eSEzequiel Garcia "\t\tBit 0 (0x01) will enable CORE messages (drm core code)\n" 526dc3e22eSEzequiel Garcia "\t\tBit 1 (0x02) will enable DRIVER messages (drm controller code)\n" 536dc3e22eSEzequiel Garcia "\t\tBit 2 (0x04) will enable KMS messages (modesetting code)\n" 546dc3e22eSEzequiel Garcia "\t\tBit 3 (0x08) will enable PRIME messages (prime code)\n" 556dc3e22eSEzequiel Garcia "\t\tBit 4 (0x10) will enable ATOMIC messages (atomic code)\n" 566dc3e22eSEzequiel Garcia "\t\tBit 5 (0x20) will enable VBL messages (vblank code)"); 5721d70354SDave Airlie module_param_named(debug, drm_debug, int, 0600); 5821d70354SDave Airlie 5921d70354SDave Airlie static DEFINE_SPINLOCK(drm_minor_lock); 6021d70354SDave Airlie static struct idr drm_minors_idr; 6121d70354SDave Airlie 6221d70354SDave Airlie static struct dentry *drm_debugfs_root; 6321d70354SDave Airlie 64a1f1a79cSJoe Perches void drm_err(const char *format, ...) 6521d70354SDave Airlie { 6621d70354SDave Airlie struct va_format vaf; 6721d70354SDave Airlie va_list args; 6821d70354SDave Airlie 6921d70354SDave Airlie va_start(args, format); 7021d70354SDave Airlie 7121d70354SDave Airlie vaf.fmt = format; 7221d70354SDave Airlie vaf.va = &args; 7321d70354SDave Airlie 742ee762b3SScott Wood printk(KERN_ERR "[" DRM_NAME ":%ps] *ERROR* %pV", 75a1f1a79cSJoe Perches __builtin_return_address(0), &vaf); 7621d70354SDave Airlie 7721d70354SDave Airlie va_end(args); 7821d70354SDave Airlie } 7921d70354SDave Airlie EXPORT_SYMBOL(drm_err); 8021d70354SDave Airlie 8121d70354SDave Airlie void drm_ut_debug_printk(const char *function_name, const char *format, ...) 8221d70354SDave Airlie { 8321d70354SDave Airlie struct va_format vaf; 8421d70354SDave Airlie va_list args; 8521d70354SDave Airlie 8621d70354SDave Airlie va_start(args, format); 8721d70354SDave Airlie vaf.fmt = format; 8821d70354SDave Airlie vaf.va = &args; 8921d70354SDave Airlie 9021d70354SDave Airlie printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf); 9121d70354SDave Airlie 9221d70354SDave Airlie va_end(args); 9321d70354SDave Airlie } 9421d70354SDave Airlie EXPORT_SYMBOL(drm_ut_debug_printk); 9521d70354SDave Airlie 9621d70354SDave Airlie /* 9721d70354SDave Airlie * DRM Minors 9821d70354SDave Airlie * A DRM device can provide several char-dev interfaces on the DRM-Major. Each 9921d70354SDave Airlie * of them is represented by a drm_minor object. Depending on the capabilities 10021d70354SDave Airlie * of the device-driver, different interfaces are registered. 10121d70354SDave Airlie * 10221d70354SDave Airlie * Minors can be accessed via dev->$minor_name. This pointer is either 10321d70354SDave Airlie * NULL or a valid drm_minor pointer and stays valid as long as the device is 10421d70354SDave Airlie * valid. This means, DRM minors have the same life-time as the underlying 10521d70354SDave Airlie * device. However, this doesn't mean that the minor is active. Minors are 10621d70354SDave Airlie * registered and unregistered dynamically according to device-state. 10721d70354SDave Airlie */ 10821d70354SDave Airlie 10921d70354SDave Airlie static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, 11021d70354SDave Airlie unsigned int type) 11121d70354SDave Airlie { 11221d70354SDave Airlie switch (type) { 11321d70354SDave Airlie case DRM_MINOR_LEGACY: 11421d70354SDave Airlie return &dev->primary; 11521d70354SDave Airlie case DRM_MINOR_RENDER: 11621d70354SDave Airlie return &dev->render; 11721d70354SDave Airlie case DRM_MINOR_CONTROL: 11821d70354SDave Airlie return &dev->control; 11921d70354SDave Airlie default: 12021d70354SDave Airlie return NULL; 12121d70354SDave Airlie } 12221d70354SDave Airlie } 12321d70354SDave Airlie 12421d70354SDave Airlie static int drm_minor_alloc(struct drm_device *dev, unsigned int type) 12521d70354SDave Airlie { 12621d70354SDave Airlie struct drm_minor *minor; 12721d70354SDave Airlie unsigned long flags; 12821d70354SDave Airlie int r; 12921d70354SDave Airlie 13021d70354SDave Airlie minor = kzalloc(sizeof(*minor), GFP_KERNEL); 13121d70354SDave Airlie if (!minor) 13221d70354SDave Airlie return -ENOMEM; 13321d70354SDave Airlie 13421d70354SDave Airlie minor->type = type; 13521d70354SDave Airlie minor->dev = dev; 13621d70354SDave Airlie 13721d70354SDave Airlie idr_preload(GFP_KERNEL); 13821d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 13921d70354SDave Airlie r = idr_alloc(&drm_minors_idr, 14021d70354SDave Airlie NULL, 14121d70354SDave Airlie 64 * type, 14221d70354SDave Airlie 64 * (type + 1), 14321d70354SDave Airlie GFP_NOWAIT); 14421d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 14521d70354SDave Airlie idr_preload_end(); 14621d70354SDave Airlie 14721d70354SDave Airlie if (r < 0) 14821d70354SDave Airlie goto err_free; 14921d70354SDave Airlie 15021d70354SDave Airlie minor->index = r; 15121d70354SDave Airlie 15221d70354SDave Airlie minor->kdev = drm_sysfs_minor_alloc(minor); 15321d70354SDave Airlie if (IS_ERR(minor->kdev)) { 15421d70354SDave Airlie r = PTR_ERR(minor->kdev); 15521d70354SDave Airlie goto err_index; 15621d70354SDave Airlie } 15721d70354SDave Airlie 15821d70354SDave Airlie *drm_minor_get_slot(dev, type) = minor; 15921d70354SDave Airlie return 0; 16021d70354SDave Airlie 16121d70354SDave Airlie err_index: 16221d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 16321d70354SDave Airlie idr_remove(&drm_minors_idr, minor->index); 16421d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 16521d70354SDave Airlie err_free: 16621d70354SDave Airlie kfree(minor); 16721d70354SDave Airlie return r; 16821d70354SDave Airlie } 16921d70354SDave Airlie 17021d70354SDave Airlie static void drm_minor_free(struct drm_device *dev, unsigned int type) 17121d70354SDave Airlie { 17221d70354SDave Airlie struct drm_minor **slot, *minor; 17321d70354SDave Airlie unsigned long flags; 17421d70354SDave Airlie 17521d70354SDave Airlie slot = drm_minor_get_slot(dev, type); 17621d70354SDave Airlie minor = *slot; 17721d70354SDave Airlie if (!minor) 17821d70354SDave Airlie return; 17921d70354SDave Airlie 18021d70354SDave Airlie put_device(minor->kdev); 18121d70354SDave Airlie 18221d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 18321d70354SDave Airlie idr_remove(&drm_minors_idr, minor->index); 18421d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 18521d70354SDave Airlie 18621d70354SDave Airlie kfree(minor); 18721d70354SDave Airlie *slot = NULL; 18821d70354SDave Airlie } 18921d70354SDave Airlie 19021d70354SDave Airlie static int drm_minor_register(struct drm_device *dev, unsigned int type) 19121d70354SDave Airlie { 19221d70354SDave Airlie struct drm_minor *minor; 19321d70354SDave Airlie unsigned long flags; 19421d70354SDave Airlie int ret; 19521d70354SDave Airlie 19621d70354SDave Airlie DRM_DEBUG("\n"); 19721d70354SDave Airlie 19821d70354SDave Airlie minor = *drm_minor_get_slot(dev, type); 19921d70354SDave Airlie if (!minor) 20021d70354SDave Airlie return 0; 20121d70354SDave Airlie 20221d70354SDave Airlie ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root); 20321d70354SDave Airlie if (ret) { 20421d70354SDave Airlie DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); 20521d70354SDave Airlie return ret; 20621d70354SDave Airlie } 20721d70354SDave Airlie 20821d70354SDave Airlie ret = device_add(minor->kdev); 20921d70354SDave Airlie if (ret) 21021d70354SDave Airlie goto err_debugfs; 21121d70354SDave Airlie 21221d70354SDave Airlie /* replace NULL with @minor so lookups will succeed from now on */ 21321d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 21421d70354SDave Airlie idr_replace(&drm_minors_idr, minor, minor->index); 21521d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 21621d70354SDave Airlie 21721d70354SDave Airlie DRM_DEBUG("new minor registered %d\n", minor->index); 21821d70354SDave Airlie return 0; 21921d70354SDave Airlie 22021d70354SDave Airlie err_debugfs: 22121d70354SDave Airlie drm_debugfs_cleanup(minor); 22221d70354SDave Airlie return ret; 22321d70354SDave Airlie } 22421d70354SDave Airlie 22521d70354SDave Airlie static void drm_minor_unregister(struct drm_device *dev, unsigned int type) 22621d70354SDave Airlie { 22721d70354SDave Airlie struct drm_minor *minor; 22821d70354SDave Airlie unsigned long flags; 22921d70354SDave Airlie 23021d70354SDave Airlie minor = *drm_minor_get_slot(dev, type); 23121d70354SDave Airlie if (!minor || !device_is_registered(minor->kdev)) 23221d70354SDave Airlie return; 23321d70354SDave Airlie 23421d70354SDave Airlie /* replace @minor with NULL so lookups will fail from now on */ 23521d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 23621d70354SDave Airlie idr_replace(&drm_minors_idr, NULL, minor->index); 23721d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 23821d70354SDave Airlie 23921d70354SDave Airlie device_del(minor->kdev); 24021d70354SDave Airlie dev_set_drvdata(minor->kdev, NULL); /* safety belt */ 24121d70354SDave Airlie drm_debugfs_cleanup(minor); 24221d70354SDave Airlie } 24321d70354SDave Airlie 24421d70354SDave Airlie /** 24521d70354SDave Airlie * drm_minor_acquire - Acquire a DRM minor 24621d70354SDave Airlie * @minor_id: Minor ID of the DRM-minor 24721d70354SDave Airlie * 24821d70354SDave Airlie * Looks up the given minor-ID and returns the respective DRM-minor object. The 24921d70354SDave Airlie * refence-count of the underlying device is increased so you must release this 25021d70354SDave Airlie * object with drm_minor_release(). 25121d70354SDave Airlie * 25221d70354SDave Airlie * As long as you hold this minor, it is guaranteed that the object and the 25321d70354SDave Airlie * minor->dev pointer will stay valid! However, the device may get unplugged and 25421d70354SDave Airlie * unregistered while you hold the minor. 25521d70354SDave Airlie * 25621d70354SDave Airlie * Returns: 25721d70354SDave Airlie * Pointer to minor-object with increased device-refcount, or PTR_ERR on 25821d70354SDave Airlie * failure. 25921d70354SDave Airlie */ 26021d70354SDave Airlie struct drm_minor *drm_minor_acquire(unsigned int minor_id) 26121d70354SDave Airlie { 26221d70354SDave Airlie struct drm_minor *minor; 26321d70354SDave Airlie unsigned long flags; 26421d70354SDave Airlie 26521d70354SDave Airlie spin_lock_irqsave(&drm_minor_lock, flags); 26621d70354SDave Airlie minor = idr_find(&drm_minors_idr, minor_id); 26721d70354SDave Airlie if (minor) 26821d70354SDave Airlie drm_dev_ref(minor->dev); 26921d70354SDave Airlie spin_unlock_irqrestore(&drm_minor_lock, flags); 27021d70354SDave Airlie 27121d70354SDave Airlie if (!minor) { 27221d70354SDave Airlie return ERR_PTR(-ENODEV); 27321d70354SDave Airlie } else if (drm_device_is_unplugged(minor->dev)) { 27421d70354SDave Airlie drm_dev_unref(minor->dev); 27521d70354SDave Airlie return ERR_PTR(-ENODEV); 27621d70354SDave Airlie } 27721d70354SDave Airlie 27821d70354SDave Airlie return minor; 27921d70354SDave Airlie } 28021d70354SDave Airlie 28121d70354SDave Airlie /** 28221d70354SDave Airlie * drm_minor_release - Release DRM minor 28321d70354SDave Airlie * @minor: Pointer to DRM minor object 28421d70354SDave Airlie * 28521d70354SDave Airlie * Release a minor that was previously acquired via drm_minor_acquire(). 28621d70354SDave Airlie */ 28721d70354SDave Airlie void drm_minor_release(struct drm_minor *minor) 28821d70354SDave Airlie { 28921d70354SDave Airlie drm_dev_unref(minor->dev); 29021d70354SDave Airlie } 29121d70354SDave Airlie 29221d70354SDave Airlie /** 2936e3f797cSDaniel Vetter * DOC: driver instance overview 2946e3f797cSDaniel Vetter * 2956e3f797cSDaniel Vetter * A device instance for a drm driver is represented by struct &drm_device. This 2966e3f797cSDaniel Vetter * is allocated with drm_dev_alloc(), usually from bus-specific ->probe() 2976e3f797cSDaniel Vetter * callbacks implemented by the driver. The driver then needs to initialize all 2986e3f797cSDaniel Vetter * the various subsystems for the drm device like memory management, vblank 2996e3f797cSDaniel Vetter * handling, modesetting support and intial output configuration plus obviously 3006e3f797cSDaniel Vetter * initialize all the corresponding hardware bits. An important part of this is 3016e3f797cSDaniel Vetter * also calling drm_dev_set_unique() to set the userspace-visible unique name of 3026e3f797cSDaniel Vetter * this device instance. Finally when everything is up and running and ready for 3036e3f797cSDaniel Vetter * userspace the device instance can be published using drm_dev_register(). 3046e3f797cSDaniel Vetter * 3056e3f797cSDaniel Vetter * There is also deprecated support for initalizing device instances using 3066e3f797cSDaniel Vetter * bus-specific helpers and the ->load() callback. But due to 3076e3f797cSDaniel Vetter * backwards-compatibility needs the device instance have to be published too 3086e3f797cSDaniel Vetter * early, which requires unpretty global locking to make safe and is therefore 3096e3f797cSDaniel Vetter * only support for existing drivers not yet converted to the new scheme. 3106e3f797cSDaniel Vetter * 3116e3f797cSDaniel Vetter * When cleaning up a device instance everything needs to be done in reverse: 3126e3f797cSDaniel Vetter * First unpublish the device instance with drm_dev_unregister(). Then clean up 3136e3f797cSDaniel Vetter * any other resources allocated at device initialization and drop the driver's 3146e3f797cSDaniel Vetter * reference to &drm_device using drm_dev_unref(). 3156e3f797cSDaniel Vetter * 3166e3f797cSDaniel Vetter * Note that the lifetime rules for &drm_device instance has still a lot of 3176e3f797cSDaniel Vetter * historical baggage. Hence use the reference counting provided by 3186e3f797cSDaniel Vetter * drm_dev_ref() and drm_dev_unref() only carefully. 3196e3f797cSDaniel Vetter * 3206e3f797cSDaniel Vetter * Also note that embedding of &drm_device is currently not (yet) supported (but 3216e3f797cSDaniel Vetter * it would be easy to add). Drivers can store driver-private data in the 3226e3f797cSDaniel Vetter * dev_priv field of &drm_device. 3236e3f797cSDaniel Vetter */ 3246e3f797cSDaniel Vetter 3256e3f797cSDaniel Vetter /** 32621d70354SDave Airlie * drm_put_dev - Unregister and release a DRM device 32721d70354SDave Airlie * @dev: DRM device 32821d70354SDave Airlie * 32921d70354SDave Airlie * Called at module unload time or when a PCI device is unplugged. 33021d70354SDave Airlie * 33121d70354SDave Airlie * Cleans up all DRM device, calling drm_lastclose(). 3326e3f797cSDaniel Vetter * 3336e3f797cSDaniel Vetter * Note: Use of this function is deprecated. It will eventually go away 3346e3f797cSDaniel Vetter * completely. Please use drm_dev_unregister() and drm_dev_unref() explicitly 3356e3f797cSDaniel Vetter * instead to make sure that the device isn't userspace accessible any more 3366e3f797cSDaniel Vetter * while teardown is in progress, ensuring that userspace can't access an 3376e3f797cSDaniel Vetter * inconsistent state. 33821d70354SDave Airlie */ 33921d70354SDave Airlie void drm_put_dev(struct drm_device *dev) 34021d70354SDave Airlie { 34121d70354SDave Airlie DRM_DEBUG("\n"); 34221d70354SDave Airlie 34321d70354SDave Airlie if (!dev) { 34421d70354SDave Airlie DRM_ERROR("cleanup called no dev\n"); 34521d70354SDave Airlie return; 34621d70354SDave Airlie } 34721d70354SDave Airlie 34821d70354SDave Airlie drm_dev_unregister(dev); 34921d70354SDave Airlie drm_dev_unref(dev); 35021d70354SDave Airlie } 35121d70354SDave Airlie EXPORT_SYMBOL(drm_put_dev); 35221d70354SDave Airlie 35321d70354SDave Airlie void drm_unplug_dev(struct drm_device *dev) 35421d70354SDave Airlie { 35521d70354SDave Airlie /* for a USB device */ 35621d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_LEGACY); 35721d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_RENDER); 35821d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_CONTROL); 35921d70354SDave Airlie 36021d70354SDave Airlie mutex_lock(&drm_global_mutex); 36121d70354SDave Airlie 36221d70354SDave Airlie drm_device_set_unplugged(dev); 36321d70354SDave Airlie 36421d70354SDave Airlie if (dev->open_count == 0) { 36521d70354SDave Airlie drm_put_dev(dev); 36621d70354SDave Airlie } 36721d70354SDave Airlie mutex_unlock(&drm_global_mutex); 36821d70354SDave Airlie } 36921d70354SDave Airlie EXPORT_SYMBOL(drm_unplug_dev); 37021d70354SDave Airlie 37121d70354SDave Airlie /* 37221d70354SDave Airlie * DRM internal mount 37321d70354SDave Airlie * We want to be able to allocate our own "struct address_space" to control 37421d70354SDave Airlie * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow 37521d70354SDave Airlie * stand-alone address_space objects, so we need an underlying inode. As there 37621d70354SDave Airlie * is no way to allocate an independent inode easily, we need a fake internal 37721d70354SDave Airlie * VFS mount-point. 37821d70354SDave Airlie * 37921d70354SDave Airlie * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() 38021d70354SDave Airlie * frees it again. You are allowed to use iget() and iput() to get references to 38121d70354SDave Airlie * the inode. But each drm_fs_inode_new() call must be paired with exactly one 38221d70354SDave Airlie * drm_fs_inode_free() call (which does not have to be the last iput()). 38321d70354SDave Airlie * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it 38421d70354SDave Airlie * between multiple inode-users. You could, technically, call 38521d70354SDave Airlie * iget() + drm_fs_inode_free() directly after alloc and sometime later do an 38621d70354SDave Airlie * iput(), but this way you'd end up with a new vfsmount for each inode. 38721d70354SDave Airlie */ 38821d70354SDave Airlie 38921d70354SDave Airlie static int drm_fs_cnt; 39021d70354SDave Airlie static struct vfsmount *drm_fs_mnt; 39121d70354SDave Airlie 39221d70354SDave Airlie static const struct dentry_operations drm_fs_dops = { 39321d70354SDave Airlie .d_dname = simple_dname, 39421d70354SDave Airlie }; 39521d70354SDave Airlie 39621d70354SDave Airlie static const struct super_operations drm_fs_sops = { 39721d70354SDave Airlie .statfs = simple_statfs, 39821d70354SDave Airlie }; 39921d70354SDave Airlie 40021d70354SDave Airlie static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, 40121d70354SDave Airlie const char *dev_name, void *data) 40221d70354SDave Airlie { 40321d70354SDave Airlie return mount_pseudo(fs_type, 40421d70354SDave Airlie "drm:", 40521d70354SDave Airlie &drm_fs_sops, 40621d70354SDave Airlie &drm_fs_dops, 40721d70354SDave Airlie 0x010203ff); 40821d70354SDave Airlie } 40921d70354SDave Airlie 41021d70354SDave Airlie static struct file_system_type drm_fs_type = { 41121d70354SDave Airlie .name = "drm", 41221d70354SDave Airlie .owner = THIS_MODULE, 41321d70354SDave Airlie .mount = drm_fs_mount, 41421d70354SDave Airlie .kill_sb = kill_anon_super, 41521d70354SDave Airlie }; 41621d70354SDave Airlie 41721d70354SDave Airlie static struct inode *drm_fs_inode_new(void) 41821d70354SDave Airlie { 41921d70354SDave Airlie struct inode *inode; 42021d70354SDave Airlie int r; 42121d70354SDave Airlie 42221d70354SDave Airlie r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); 42321d70354SDave Airlie if (r < 0) { 42421d70354SDave Airlie DRM_ERROR("Cannot mount pseudo fs: %d\n", r); 42521d70354SDave Airlie return ERR_PTR(r); 42621d70354SDave Airlie } 42721d70354SDave Airlie 42821d70354SDave Airlie inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); 42921d70354SDave Airlie if (IS_ERR(inode)) 43021d70354SDave Airlie simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); 43121d70354SDave Airlie 43221d70354SDave Airlie return inode; 43321d70354SDave Airlie } 43421d70354SDave Airlie 43521d70354SDave Airlie static void drm_fs_inode_free(struct inode *inode) 43621d70354SDave Airlie { 43721d70354SDave Airlie if (inode) { 43821d70354SDave Airlie iput(inode); 43921d70354SDave Airlie simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); 44021d70354SDave Airlie } 44121d70354SDave Airlie } 44221d70354SDave Airlie 44321d70354SDave Airlie /** 444b209aca3SChris Wilson * drm_dev_init - Initialise new DRM device 445b209aca3SChris Wilson * @dev: DRM device 446b209aca3SChris Wilson * @driver: DRM driver 44721d70354SDave Airlie * @parent: Parent device object 44821d70354SDave Airlie * 449b209aca3SChris Wilson * Initialize a new DRM device. No device registration is done. 45021d70354SDave Airlie * Call drm_dev_register() to advertice the device to user space and register it 4516e3f797cSDaniel Vetter * with other core subsystems. This should be done last in the device 4526e3f797cSDaniel Vetter * initialization sequence to make sure userspace can't access an inconsistent 4536e3f797cSDaniel Vetter * state. 45421d70354SDave Airlie * 45521d70354SDave Airlie * The initial ref-count of the object is 1. Use drm_dev_ref() and 45621d70354SDave Airlie * drm_dev_unref() to take and drop further ref-counts. 45721d70354SDave Airlie * 458b0ff4b93SDaniel Vetter * Note that for purely virtual devices @parent can be NULL. 459b0ff4b93SDaniel Vetter * 460b209aca3SChris Wilson * Drivers that do not want to allocate their own device struct 461b209aca3SChris Wilson * embedding struct &drm_device can call drm_dev_alloc() instead. 462b209aca3SChris Wilson * 46321d70354SDave Airlie * RETURNS: 464b209aca3SChris Wilson * 0 on success, or error code on failure. 46521d70354SDave Airlie */ 466b209aca3SChris Wilson int drm_dev_init(struct drm_device *dev, 467b209aca3SChris Wilson struct drm_driver *driver, 46821d70354SDave Airlie struct device *parent) 46921d70354SDave Airlie { 47021d70354SDave Airlie int ret; 47121d70354SDave Airlie 47221d70354SDave Airlie kref_init(&dev->ref); 47321d70354SDave Airlie dev->dev = parent; 47421d70354SDave Airlie dev->driver = driver; 47521d70354SDave Airlie 47621d70354SDave Airlie INIT_LIST_HEAD(&dev->filelist); 47721d70354SDave Airlie INIT_LIST_HEAD(&dev->ctxlist); 47821d70354SDave Airlie INIT_LIST_HEAD(&dev->vmalist); 47921d70354SDave Airlie INIT_LIST_HEAD(&dev->maplist); 48021d70354SDave Airlie INIT_LIST_HEAD(&dev->vblank_event_list); 48121d70354SDave Airlie 48221d70354SDave Airlie spin_lock_init(&dev->buf_lock); 48321d70354SDave Airlie spin_lock_init(&dev->event_lock); 48421d70354SDave Airlie mutex_init(&dev->struct_mutex); 4851d2ac403SDaniel Vetter mutex_init(&dev->filelist_mutex); 48621d70354SDave Airlie mutex_init(&dev->ctxlist_mutex); 48721d70354SDave Airlie mutex_init(&dev->master_mutex); 48821d70354SDave Airlie 48921d70354SDave Airlie dev->anon_inode = drm_fs_inode_new(); 49021d70354SDave Airlie if (IS_ERR(dev->anon_inode)) { 49121d70354SDave Airlie ret = PTR_ERR(dev->anon_inode); 49221d70354SDave Airlie DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); 49321d70354SDave Airlie goto err_free; 49421d70354SDave Airlie } 49521d70354SDave Airlie 49621d70354SDave Airlie if (drm_core_check_feature(dev, DRIVER_MODESET)) { 49721d70354SDave Airlie ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); 49821d70354SDave Airlie if (ret) 49921d70354SDave Airlie goto err_minors; 50021d70354SDave Airlie } 50121d70354SDave Airlie 50221d70354SDave Airlie if (drm_core_check_feature(dev, DRIVER_RENDER)) { 50321d70354SDave Airlie ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); 50421d70354SDave Airlie if (ret) 50521d70354SDave Airlie goto err_minors; 50621d70354SDave Airlie } 50721d70354SDave Airlie 50821d70354SDave Airlie ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); 50921d70354SDave Airlie if (ret) 51021d70354SDave Airlie goto err_minors; 51121d70354SDave Airlie 512b209aca3SChris Wilson ret = drm_ht_create(&dev->map_hash, 12); 513b209aca3SChris Wilson if (ret) 51421d70354SDave Airlie goto err_minors; 51521d70354SDave Airlie 516ba6976c1SDaniel Vetter drm_legacy_ctxbitmap_init(dev); 51721d70354SDave Airlie 5181bcecfacSAndrzej Hajda if (drm_core_check_feature(dev, DRIVER_GEM)) { 51921d70354SDave Airlie ret = drm_gem_init(dev); 52021d70354SDave Airlie if (ret) { 52121d70354SDave Airlie DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); 52221d70354SDave Airlie goto err_ctxbitmap; 52321d70354SDave Airlie } 52421d70354SDave Airlie } 52521d70354SDave Airlie 526e112e593SNicolas Iooss if (parent) { 527e112e593SNicolas Iooss ret = drm_dev_set_unique(dev, dev_name(parent)); 528e112e593SNicolas Iooss if (ret) 529e112e593SNicolas Iooss goto err_setunique; 530e112e593SNicolas Iooss } 531e112e593SNicolas Iooss 532b209aca3SChris Wilson return 0; 53321d70354SDave Airlie 534e112e593SNicolas Iooss err_setunique: 535e112e593SNicolas Iooss if (drm_core_check_feature(dev, DRIVER_GEM)) 536e112e593SNicolas Iooss drm_gem_destroy(dev); 53721d70354SDave Airlie err_ctxbitmap: 53821d70354SDave Airlie drm_legacy_ctxbitmap_cleanup(dev); 53921d70354SDave Airlie drm_ht_remove(&dev->map_hash); 54021d70354SDave Airlie err_minors: 54121d70354SDave Airlie drm_minor_free(dev, DRM_MINOR_LEGACY); 54221d70354SDave Airlie drm_minor_free(dev, DRM_MINOR_RENDER); 54321d70354SDave Airlie drm_minor_free(dev, DRM_MINOR_CONTROL); 54421d70354SDave Airlie drm_fs_inode_free(dev->anon_inode); 54521d70354SDave Airlie err_free: 54621d70354SDave Airlie mutex_destroy(&dev->master_mutex); 547b209aca3SChris Wilson return ret; 548b209aca3SChris Wilson } 549b209aca3SChris Wilson EXPORT_SYMBOL(drm_dev_init); 550b209aca3SChris Wilson 551b209aca3SChris Wilson /** 552b209aca3SChris Wilson * drm_dev_alloc - Allocate new DRM device 553b209aca3SChris Wilson * @driver: DRM driver to allocate device for 554b209aca3SChris Wilson * @parent: Parent device object 555b209aca3SChris Wilson * 556b209aca3SChris Wilson * Allocate and initialize a new DRM device. No device registration is done. 557b209aca3SChris Wilson * Call drm_dev_register() to advertice the device to user space and register it 558b209aca3SChris Wilson * with other core subsystems. This should be done last in the device 559b209aca3SChris Wilson * initialization sequence to make sure userspace can't access an inconsistent 560b209aca3SChris Wilson * state. 561b209aca3SChris Wilson * 562b209aca3SChris Wilson * The initial ref-count of the object is 1. Use drm_dev_ref() and 563b209aca3SChris Wilson * drm_dev_unref() to take and drop further ref-counts. 564b209aca3SChris Wilson * 565b209aca3SChris Wilson * Note that for purely virtual devices @parent can be NULL. 566b209aca3SChris Wilson * 567b209aca3SChris Wilson * Drivers that wish to subclass or embed struct &drm_device into their 568b209aca3SChris Wilson * own struct should look at using drm_dev_init() instead. 569b209aca3SChris Wilson * 570b209aca3SChris Wilson * RETURNS: 571b209aca3SChris Wilson * Pointer to new DRM device, or NULL if out of memory. 572b209aca3SChris Wilson */ 573b209aca3SChris Wilson struct drm_device *drm_dev_alloc(struct drm_driver *driver, 574b209aca3SChris Wilson struct device *parent) 575b209aca3SChris Wilson { 576b209aca3SChris Wilson struct drm_device *dev; 577b209aca3SChris Wilson int ret; 578b209aca3SChris Wilson 579b209aca3SChris Wilson dev = kzalloc(sizeof(*dev), GFP_KERNEL); 580b209aca3SChris Wilson if (!dev) 581b209aca3SChris Wilson return NULL; 582b209aca3SChris Wilson 583b209aca3SChris Wilson ret = drm_dev_init(dev, driver, parent); 584b209aca3SChris Wilson if (ret) { 58521d70354SDave Airlie kfree(dev); 58621d70354SDave Airlie return NULL; 58721d70354SDave Airlie } 588b209aca3SChris Wilson 589b209aca3SChris Wilson return dev; 590b209aca3SChris Wilson } 59121d70354SDave Airlie EXPORT_SYMBOL(drm_dev_alloc); 59221d70354SDave Airlie 59321d70354SDave Airlie static void drm_dev_release(struct kref *ref) 59421d70354SDave Airlie { 59521d70354SDave Airlie struct drm_device *dev = container_of(ref, struct drm_device, ref); 59621d70354SDave Airlie 5971bcecfacSAndrzej Hajda if (drm_core_check_feature(dev, DRIVER_GEM)) 59821d70354SDave Airlie drm_gem_destroy(dev); 59921d70354SDave Airlie 60021d70354SDave Airlie drm_legacy_ctxbitmap_cleanup(dev); 60121d70354SDave Airlie drm_ht_remove(&dev->map_hash); 60221d70354SDave Airlie drm_fs_inode_free(dev->anon_inode); 60321d70354SDave Airlie 60421d70354SDave Airlie drm_minor_free(dev, DRM_MINOR_LEGACY); 60521d70354SDave Airlie drm_minor_free(dev, DRM_MINOR_RENDER); 60621d70354SDave Airlie drm_minor_free(dev, DRM_MINOR_CONTROL); 60721d70354SDave Airlie 60821d70354SDave Airlie mutex_destroy(&dev->master_mutex); 60921d70354SDave Airlie kfree(dev->unique); 61021d70354SDave Airlie kfree(dev); 61121d70354SDave Airlie } 61221d70354SDave Airlie 61321d70354SDave Airlie /** 61421d70354SDave Airlie * drm_dev_ref - Take reference of a DRM device 61521d70354SDave Airlie * @dev: device to take reference of or NULL 61621d70354SDave Airlie * 61721d70354SDave Airlie * This increases the ref-count of @dev by one. You *must* already own a 61821d70354SDave Airlie * reference when calling this. Use drm_dev_unref() to drop this reference 61921d70354SDave Airlie * again. 62021d70354SDave Airlie * 62121d70354SDave Airlie * This function never fails. However, this function does not provide *any* 62221d70354SDave Airlie * guarantee whether the device is alive or running. It only provides a 62321d70354SDave Airlie * reference to the object and the memory associated with it. 62421d70354SDave Airlie */ 62521d70354SDave Airlie void drm_dev_ref(struct drm_device *dev) 62621d70354SDave Airlie { 62721d70354SDave Airlie if (dev) 62821d70354SDave Airlie kref_get(&dev->ref); 62921d70354SDave Airlie } 63021d70354SDave Airlie EXPORT_SYMBOL(drm_dev_ref); 63121d70354SDave Airlie 63221d70354SDave Airlie /** 63321d70354SDave Airlie * drm_dev_unref - Drop reference of a DRM device 63421d70354SDave Airlie * @dev: device to drop reference of or NULL 63521d70354SDave Airlie * 63621d70354SDave Airlie * This decreases the ref-count of @dev by one. The device is destroyed if the 63721d70354SDave Airlie * ref-count drops to zero. 63821d70354SDave Airlie */ 63921d70354SDave Airlie void drm_dev_unref(struct drm_device *dev) 64021d70354SDave Airlie { 64121d70354SDave Airlie if (dev) 64221d70354SDave Airlie kref_put(&dev->ref, drm_dev_release); 64321d70354SDave Airlie } 64421d70354SDave Airlie EXPORT_SYMBOL(drm_dev_unref); 64521d70354SDave Airlie 64621d70354SDave Airlie /** 64721d70354SDave Airlie * drm_dev_register - Register DRM device 64821d70354SDave Airlie * @dev: Device to register 64921d70354SDave Airlie * @flags: Flags passed to the driver's .load() function 65021d70354SDave Airlie * 65121d70354SDave Airlie * Register the DRM device @dev with the system, advertise device to user-space 65221d70354SDave Airlie * and start normal device operation. @dev must be allocated via drm_dev_alloc() 653e28cd4d0SChris Wilson * previously. 65421d70354SDave Airlie * 65521d70354SDave Airlie * Never call this twice on any device! 65621d70354SDave Airlie * 6576e3f797cSDaniel Vetter * NOTE: To ensure backward compatibility with existing drivers method this 6586e3f797cSDaniel Vetter * function calls the ->load() method after registering the device nodes, 6596e3f797cSDaniel Vetter * creating race conditions. Usage of the ->load() methods is therefore 6606e3f797cSDaniel Vetter * deprecated, drivers must perform all initialization before calling 6616e3f797cSDaniel Vetter * drm_dev_register(). 6626e3f797cSDaniel Vetter * 66321d70354SDave Airlie * RETURNS: 66421d70354SDave Airlie * 0 on success, negative error code on failure. 66521d70354SDave Airlie */ 66621d70354SDave Airlie int drm_dev_register(struct drm_device *dev, unsigned long flags) 66721d70354SDave Airlie { 66821d70354SDave Airlie int ret; 66921d70354SDave Airlie 67021d70354SDave Airlie mutex_lock(&drm_global_mutex); 67121d70354SDave Airlie 67221d70354SDave Airlie ret = drm_minor_register(dev, DRM_MINOR_CONTROL); 67321d70354SDave Airlie if (ret) 67421d70354SDave Airlie goto err_minors; 67521d70354SDave Airlie 67621d70354SDave Airlie ret = drm_minor_register(dev, DRM_MINOR_RENDER); 67721d70354SDave Airlie if (ret) 67821d70354SDave Airlie goto err_minors; 67921d70354SDave Airlie 68021d70354SDave Airlie ret = drm_minor_register(dev, DRM_MINOR_LEGACY); 68121d70354SDave Airlie if (ret) 68221d70354SDave Airlie goto err_minors; 68321d70354SDave Airlie 68421d70354SDave Airlie if (dev->driver->load) { 68521d70354SDave Airlie ret = dev->driver->load(dev, flags); 68621d70354SDave Airlie if (ret) 68721d70354SDave Airlie goto err_minors; 68821d70354SDave Airlie } 68921d70354SDave Airlie 690bee7fb15SChris Wilson if (drm_core_check_feature(dev, DRIVER_MODESET)) 691e28cd4d0SChris Wilson drm_connector_register_all(dev); 692e28cd4d0SChris Wilson 69321d70354SDave Airlie ret = 0; 69421d70354SDave Airlie goto out_unlock; 69521d70354SDave Airlie 69621d70354SDave Airlie err_minors: 69721d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_LEGACY); 69821d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_RENDER); 69921d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_CONTROL); 70021d70354SDave Airlie out_unlock: 70121d70354SDave Airlie mutex_unlock(&drm_global_mutex); 70221d70354SDave Airlie return ret; 70321d70354SDave Airlie } 70421d70354SDave Airlie EXPORT_SYMBOL(drm_dev_register); 70521d70354SDave Airlie 70621d70354SDave Airlie /** 70721d70354SDave Airlie * drm_dev_unregister - Unregister DRM device 70821d70354SDave Airlie * @dev: Device to unregister 70921d70354SDave Airlie * 71021d70354SDave Airlie * Unregister the DRM device from the system. This does the reverse of 71121d70354SDave Airlie * drm_dev_register() but does not deallocate the device. The caller must call 71221d70354SDave Airlie * drm_dev_unref() to drop their final reference. 7136e3f797cSDaniel Vetter * 7146e3f797cSDaniel Vetter * This should be called first in the device teardown code to make sure 7156e3f797cSDaniel Vetter * userspace can't access the device instance any more. 71621d70354SDave Airlie */ 71721d70354SDave Airlie void drm_dev_unregister(struct drm_device *dev) 71821d70354SDave Airlie { 71921d70354SDave Airlie struct drm_map_list *r_list, *list_temp; 72021d70354SDave Airlie 72121d70354SDave Airlie drm_lastclose(dev); 72221d70354SDave Airlie 723bee7fb15SChris Wilson if (drm_core_check_feature(dev, DRIVER_MODESET)) 724e28cd4d0SChris Wilson drm_connector_unregister_all(dev); 725e28cd4d0SChris Wilson 72621d70354SDave Airlie if (dev->driver->unload) 72721d70354SDave Airlie dev->driver->unload(dev); 72821d70354SDave Airlie 72921d70354SDave Airlie if (dev->agp) 73021d70354SDave Airlie drm_pci_agp_destroy(dev); 73121d70354SDave Airlie 73221d70354SDave Airlie drm_vblank_cleanup(dev); 73321d70354SDave Airlie 73421d70354SDave Airlie list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) 7359fc5cde7SDavid Herrmann drm_legacy_rmmap(dev, r_list->map); 73621d70354SDave Airlie 73721d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_LEGACY); 73821d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_RENDER); 73921d70354SDave Airlie drm_minor_unregister(dev, DRM_MINOR_CONTROL); 74021d70354SDave Airlie } 74121d70354SDave Airlie EXPORT_SYMBOL(drm_dev_unregister); 74221d70354SDave Airlie 74321d70354SDave Airlie /** 74421d70354SDave Airlie * drm_dev_set_unique - Set the unique name of a DRM device 74521d70354SDave Airlie * @dev: device of which to set the unique name 746399368aaSNicolas Iooss * @name: unique name 74721d70354SDave Airlie * 748399368aaSNicolas Iooss * Sets the unique name of a DRM device using the specified string. Drivers 749399368aaSNicolas Iooss * can use this at driver probe time if the unique name of the devices they 750399368aaSNicolas Iooss * drive is static. 75121d70354SDave Airlie * 75221d70354SDave Airlie * Return: 0 on success or a negative error code on failure. 75321d70354SDave Airlie */ 754399368aaSNicolas Iooss int drm_dev_set_unique(struct drm_device *dev, const char *name) 75521d70354SDave Airlie { 75621d70354SDave Airlie kfree(dev->unique); 757399368aaSNicolas Iooss dev->unique = kstrdup(name, GFP_KERNEL); 75821d70354SDave Airlie 75921d70354SDave Airlie return dev->unique ? 0 : -ENOMEM; 76021d70354SDave Airlie } 76121d70354SDave Airlie EXPORT_SYMBOL(drm_dev_set_unique); 76221d70354SDave Airlie 76321d70354SDave Airlie /* 76421d70354SDave Airlie * DRM Core 76521d70354SDave Airlie * The DRM core module initializes all global DRM objects and makes them 76621d70354SDave Airlie * available to drivers. Once setup, drivers can probe their respective 76721d70354SDave Airlie * devices. 76821d70354SDave Airlie * Currently, core management includes: 76921d70354SDave Airlie * - The "DRM-Global" key/value database 77021d70354SDave Airlie * - Global ID management for connectors 77121d70354SDave Airlie * - DRM major number allocation 77221d70354SDave Airlie * - DRM minor management 77321d70354SDave Airlie * - DRM sysfs class 77421d70354SDave Airlie * - DRM debugfs root 77521d70354SDave Airlie * 77621d70354SDave Airlie * Furthermore, the DRM core provides dynamic char-dev lookups. For each 77721d70354SDave Airlie * interface registered on a DRM device, you can request minor numbers from DRM 77821d70354SDave Airlie * core. DRM core takes care of major-number management and char-dev 77921d70354SDave Airlie * registration. A stub ->open() callback forwards any open() requests to the 78021d70354SDave Airlie * registered minor. 78121d70354SDave Airlie */ 78221d70354SDave Airlie 78321d70354SDave Airlie static int drm_stub_open(struct inode *inode, struct file *filp) 78421d70354SDave Airlie { 78521d70354SDave Airlie const struct file_operations *new_fops; 78621d70354SDave Airlie struct drm_minor *minor; 78721d70354SDave Airlie int err; 78821d70354SDave Airlie 78921d70354SDave Airlie DRM_DEBUG("\n"); 79021d70354SDave Airlie 79121d70354SDave Airlie mutex_lock(&drm_global_mutex); 79221d70354SDave Airlie minor = drm_minor_acquire(iminor(inode)); 79321d70354SDave Airlie if (IS_ERR(minor)) { 79421d70354SDave Airlie err = PTR_ERR(minor); 79521d70354SDave Airlie goto out_unlock; 79621d70354SDave Airlie } 79721d70354SDave Airlie 79821d70354SDave Airlie new_fops = fops_get(minor->dev->driver->fops); 79921d70354SDave Airlie if (!new_fops) { 80021d70354SDave Airlie err = -ENODEV; 80121d70354SDave Airlie goto out_release; 80221d70354SDave Airlie } 80321d70354SDave Airlie 80421d70354SDave Airlie replace_fops(filp, new_fops); 80521d70354SDave Airlie if (filp->f_op->open) 80621d70354SDave Airlie err = filp->f_op->open(inode, filp); 80721d70354SDave Airlie else 80821d70354SDave Airlie err = 0; 80921d70354SDave Airlie 81021d70354SDave Airlie out_release: 81121d70354SDave Airlie drm_minor_release(minor); 81221d70354SDave Airlie out_unlock: 81321d70354SDave Airlie mutex_unlock(&drm_global_mutex); 81421d70354SDave Airlie return err; 81521d70354SDave Airlie } 81621d70354SDave Airlie 81721d70354SDave Airlie static const struct file_operations drm_stub_fops = { 81821d70354SDave Airlie .owner = THIS_MODULE, 81921d70354SDave Airlie .open = drm_stub_open, 82021d70354SDave Airlie .llseek = noop_llseek, 82121d70354SDave Airlie }; 82221d70354SDave Airlie 82321d70354SDave Airlie static int __init drm_core_init(void) 82421d70354SDave Airlie { 82521d70354SDave Airlie int ret = -ENOMEM; 82621d70354SDave Airlie 82721d70354SDave Airlie drm_global_init(); 82821d70354SDave Airlie drm_connector_ida_init(); 82921d70354SDave Airlie idr_init(&drm_minors_idr); 83021d70354SDave Airlie 83121d70354SDave Airlie if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) 83221d70354SDave Airlie goto err_p1; 83321d70354SDave Airlie 834fcc90213SDavid Herrmann ret = drm_sysfs_init(); 835fcc90213SDavid Herrmann if (ret < 0) { 83621d70354SDave Airlie printk(KERN_ERR "DRM: Error creating drm class.\n"); 83721d70354SDave Airlie goto err_p2; 83821d70354SDave Airlie } 83921d70354SDave Airlie 84021d70354SDave Airlie drm_debugfs_root = debugfs_create_dir("dri", NULL); 84121d70354SDave Airlie if (!drm_debugfs_root) { 84221d70354SDave Airlie DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); 84321d70354SDave Airlie ret = -1; 84421d70354SDave Airlie goto err_p3; 84521d70354SDave Airlie } 84621d70354SDave Airlie 84721d70354SDave Airlie DRM_INFO("Initialized %s %d.%d.%d %s\n", 84821d70354SDave Airlie CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); 84921d70354SDave Airlie return 0; 85021d70354SDave Airlie err_p3: 85121d70354SDave Airlie drm_sysfs_destroy(); 85221d70354SDave Airlie err_p2: 85321d70354SDave Airlie unregister_chrdev(DRM_MAJOR, "drm"); 85421d70354SDave Airlie 85521d70354SDave Airlie idr_destroy(&drm_minors_idr); 85621d70354SDave Airlie err_p1: 85721d70354SDave Airlie return ret; 85821d70354SDave Airlie } 85921d70354SDave Airlie 86021d70354SDave Airlie static void __exit drm_core_exit(void) 86121d70354SDave Airlie { 86221d70354SDave Airlie debugfs_remove(drm_debugfs_root); 86321d70354SDave Airlie drm_sysfs_destroy(); 86421d70354SDave Airlie 86521d70354SDave Airlie unregister_chrdev(DRM_MAJOR, "drm"); 86621d70354SDave Airlie 86721d70354SDave Airlie drm_connector_ida_destroy(); 86821d70354SDave Airlie idr_destroy(&drm_minors_idr); 86921d70354SDave Airlie } 87021d70354SDave Airlie 87121d70354SDave Airlie module_init(drm_core_init); 87221d70354SDave Airlie module_exit(drm_core_exit); 873