/* * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org * * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * Author Rickard E. (Rik) Faith * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #include #include #include #include #include "drm_legacy.h" #include "drm_internal.h" /* * drm_debug: Enable debug output. * Bitmask of DRM_UT_x. See include/drm/drmP.h for details. */ #ifdef __DragonFly__ /* Provides three levels of debug: off, minimal, verbose */ #if DRM_DEBUG_DEFAULT_ON == 1 #define DRM_DEBUGBITS_ON (DRM_UT_CORE | DRM_UT_DRIVER | DRM_UT_KMS | \ DRM_UT_PRIME| DRM_UT_ATOMIC | DRM_UT_FIOCTL) #elif DRM_DEBUG_DEFAULT_ON == 2 #define DRM_DEBUGBITS_ON (DRM_UT_CORE | DRM_UT_DRIVER | DRM_UT_KMS | \ DRM_UT_PRIME| DRM_UT_ATOMIC | DRM_UT_FIOCTL | \ DRM_UT_PID | DRM_UT_IOCTL | DRM_UT_VBLANK) #else #define DRM_DEBUGBITS_ON (0x0) #endif unsigned int drm_debug = DRM_DEBUGBITS_ON; /* defaults to 0 */ #else unsigned int drm_debug = 0; #endif /* __DragonFly__ */ EXPORT_SYMBOL(drm_debug); MODULE_AUTHOR(CORE_AUTHOR); MODULE_DESCRIPTION(CORE_DESC); MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug category.\n" "\t\tBit 0 (0x01) will enable CORE messages (drm core code)\n" "\t\tBit 1 (0x02) will enable DRIVER messages (drm controller code)\n" "\t\tBit 2 (0x04) will enable KMS messages (modesetting code)\n" "\t\tBit 3 (0x08) will enable PRIME messages (prime code)\n" "\t\tBit 4 (0x10) will enable ATOMIC messages (atomic code)\n" "\t\tBit 5 (0x20) will enable VBL messages (vblank code)"); module_param_named(debug, drm_debug, int, 0600); #if 0 static DEFINE_SPINLOCK(drm_minor_lock); static struct idr drm_minors_idr; #endif #if 0 static struct dentry *drm_debugfs_root; #endif void drm_err(const char *func, const char *format, ...) { __va_list args; kprintf("error: [" DRM_NAME ":pid%d:%s] *ERROR* ", DRM_CURRENTPID, func); __va_start(args, format); kvprintf(format, args); __va_end(args); } EXPORT_SYMBOL(drm_err); void drm_ut_debug_printk(const char *function_name, const char *format, ...) { __va_list args; if (unlikely(drm_debug & DRM_UT_PID)) { kprintf("[" DRM_NAME ":pid%d:%s] ", DRM_CURRENTPID, function_name); } else { kprintf("[" DRM_NAME ":%s] ", function_name); } __va_start(args, format); kvprintf(format, args); __va_end(args); } EXPORT_SYMBOL(drm_ut_debug_printk); #if 0 struct drm_master *drm_master_create(struct drm_minor *minor) { struct drm_master *master; master = kzalloc(sizeof(*master), GFP_KERNEL); if (!master) return NULL; kref_init(&master->refcount); spin_lock_init(&master->lock.spinlock); init_waitqueue_head(&master->lock.lock_queue); if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) { kfree(master); return NULL; } master->minor = minor; return master; } struct drm_master *drm_master_get(struct drm_master *master) { kref_get(&master->refcount); return master; } EXPORT_SYMBOL(drm_master_get); static void drm_master_destroy(struct kref *kref) { struct drm_master *master = container_of(kref, struct drm_master, refcount); struct drm_device *dev = master->minor->dev; struct drm_map_list *r_list, *list_temp; if (dev->driver->master_destroy) dev->driver->master_destroy(dev, master); mutex_lock(&dev->struct_mutex); list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { if (r_list->master == master) { drm_legacy_rmmap_locked(dev, r_list->map); r_list = NULL; } } if (master->unique) { kfree(master->unique); master->unique = NULL; master->unique_len = 0; } drm_ht_remove(&master->magiclist); mutex_unlock(&dev->struct_mutex); kfree(master); } void drm_master_put(struct drm_master **master) { kref_put(&(*master)->refcount, drm_master_destroy); *master = NULL; } EXPORT_SYMBOL(drm_master_put); #endif int drm_setmaster_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { DRM_DEBUG("setmaster\n"); if (file_priv->master != 0) return (0); return (-EPERM); } int drm_dropmaster_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { DRM_DEBUG("dropmaster\n"); if (file_priv->master != 0) return -EINVAL; return 0; } #if 0 /* * DRM Minors * A DRM device can provide several char-dev interfaces on the DRM-Major. Each * of them is represented by a drm_minor object. Depending on the capabilities * of the device-driver, different interfaces are registered. * * Minors can be accessed via dev->$minor_name. This pointer is either * NULL or a valid drm_minor pointer and stays valid as long as the device is * valid. This means, DRM minors have the same life-time as the underlying * device. However, this doesn't mean that the minor is active. Minors are * registered and unregistered dynamically according to device-state. */ static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, unsigned int type) { switch (type) { case DRM_MINOR_LEGACY: return &dev->primary; case DRM_MINOR_RENDER: return &dev->render; case DRM_MINOR_CONTROL: return &dev->control; default: return NULL; } } static int drm_minor_alloc(struct drm_device *dev, unsigned int type) { struct drm_minor *minor; unsigned long flags; int r; minor = kzalloc(sizeof(*minor), GFP_KERNEL); if (!minor) return -ENOMEM; minor->type = type; minor->dev = dev; idr_preload(GFP_KERNEL); spin_lock_irqsave(&drm_minor_lock, flags); r = idr_alloc(&drm_minors_idr, NULL, 64 * type, 64 * (type + 1), GFP_NOWAIT); spin_unlock_irqrestore(&drm_minor_lock, flags); idr_preload_end(); if (r < 0) goto err_free; minor->index = r; minor->kdev = drm_sysfs_minor_alloc(minor); if (IS_ERR(minor->kdev)) { r = PTR_ERR(minor->kdev); goto err_index; } *drm_minor_get_slot(dev, type) = minor; return 0; err_index: spin_lock_irqsave(&drm_minor_lock, flags); idr_remove(&drm_minors_idr, minor->index); spin_unlock_irqrestore(&drm_minor_lock, flags); err_free: kfree(minor); return r; } static void drm_minor_free(struct drm_device *dev, unsigned int type) { struct drm_minor **slot, *minor; unsigned long flags; slot = drm_minor_get_slot(dev, type); minor = *slot; if (!minor) return; put_device(minor->kdev); spin_lock_irqsave(&drm_minor_lock, flags); idr_remove(&drm_minors_idr, minor->index); spin_unlock_irqrestore(&drm_minor_lock, flags); kfree(minor); *slot = NULL; } static int drm_minor_register(struct drm_device *dev, unsigned int type) { struct drm_minor *minor; unsigned long flags; int ret; DRM_DEBUG("\n"); minor = *drm_minor_get_slot(dev, type); if (!minor) return 0; ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root); if (ret) { DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); return ret; } ret = device_add(minor->kdev); if (ret) goto err_debugfs; /* replace NULL with @minor so lookups will succeed from now on */ spin_lock_irqsave(&drm_minor_lock, flags); idr_replace(&drm_minors_idr, minor, minor->index); spin_unlock_irqrestore(&drm_minor_lock, flags); DRM_DEBUG("new minor registered %d\n", minor->index); return 0; err_debugfs: drm_debugfs_cleanup(minor); return ret; } static void drm_minor_unregister(struct drm_device *dev, unsigned int type) { struct drm_minor *minor; unsigned long flags; minor = *drm_minor_get_slot(dev, type); if (!minor || !device_is_registered(minor->kdev)) return; /* replace @minor with NULL so lookups will fail from now on */ spin_lock_irqsave(&drm_minor_lock, flags); idr_replace(&drm_minors_idr, NULL, minor->index); spin_unlock_irqrestore(&drm_minor_lock, flags); device_del(minor->kdev); dev_set_drvdata(minor->kdev, NULL); /* safety belt */ drm_debugfs_cleanup(minor); } /** * drm_minor_acquire - Acquire a DRM minor * @minor_id: Minor ID of the DRM-minor * * Looks up the given minor-ID and returns the respective DRM-minor object. The * refence-count of the underlying device is increased so you must release this * object with drm_minor_release(). * * As long as you hold this minor, it is guaranteed that the object and the * minor->dev pointer will stay valid! However, the device may get unplugged and * unregistered while you hold the minor. * * Returns: * Pointer to minor-object with increased device-refcount, or PTR_ERR on * failure. */ struct drm_minor *drm_minor_acquire(unsigned int minor_id) { struct drm_minor *minor; unsigned long flags; spin_lock_irqsave(&drm_minor_lock, flags); minor = idr_find(&drm_minors_idr, minor_id); if (minor) drm_dev_ref(minor->dev); spin_unlock_irqrestore(&drm_minor_lock, flags); if (!minor) { return ERR_PTR(-ENODEV); } else if (drm_device_is_unplugged(minor->dev)) { drm_dev_unref(minor->dev); return ERR_PTR(-ENODEV); } return minor; } /** * drm_minor_release - Release DRM minor * @minor: Pointer to DRM minor object * * Release a minor that was previously acquired via drm_minor_acquire(). */ void drm_minor_release(struct drm_minor *minor) { drm_dev_unref(minor->dev); } /** * DOC: driver instance overview * * A device instance for a drm driver is represented by struct &drm_device. This * is allocated with drm_dev_alloc(), usually from bus-specific ->probe() * callbacks implemented by the driver. The driver then needs to initialize all * the various subsystems for the drm device like memory management, vblank * handling, modesetting support and intial output configuration plus obviously * initialize all the corresponding hardware bits. An important part of this is * also calling drm_dev_set_unique() to set the userspace-visible unique name of * this device instance. Finally when everything is up and running and ready for * userspace the device instance can be published using drm_dev_register(). * * There is also deprecated support for initalizing device instances using * bus-specific helpers and the ->load() callback. But due to * backwards-compatibility needs the device instance have to be published too * early, which requires unpretty global locking to make safe and is therefore * only support for existing drivers not yet converted to the new scheme. * * When cleaning up a device instance everything needs to be done in reverse: * First unpublish the device instance with drm_dev_unregister(). Then clean up * any other resources allocated at device initialization and drop the driver's * reference to &drm_device using drm_dev_unref(). * * Note that the lifetime rules for &drm_device instance has still a lot of * historical baggage. Hence use the reference counting provided by * drm_dev_ref() and drm_dev_unref() only carefully. * * Also note that embedding of &drm_device is currently not (yet) supported (but * it would be easy to add). Drivers can store driver-private data in the * dev_priv field of &drm_device. */ /** * drm_put_dev - Unregister and release a DRM device * @dev: DRM device * * Called at module unload time or when a PCI device is unplugged. * * Cleans up all DRM device, calling drm_lastclose(). * * Note: Use of this function is deprecated. It will eventually go away * completely. Please use drm_dev_unregister() and drm_dev_unref() explicitly * instead to make sure that the device isn't userspace accessible any more * while teardown is in progress, ensuring that userspace can't access an * inconsistent state. */ void drm_put_dev(struct drm_device *dev) { DRM_DEBUG("\n"); if (!dev) { DRM_ERROR("cleanup called no dev\n"); return; } drm_dev_unregister(dev); drm_dev_unref(dev); } EXPORT_SYMBOL(drm_put_dev); void drm_unplug_dev(struct drm_device *dev) { /* for a USB device */ drm_minor_unregister(dev, DRM_MINOR_LEGACY); drm_minor_unregister(dev, DRM_MINOR_RENDER); drm_minor_unregister(dev, DRM_MINOR_CONTROL); mutex_lock(&drm_global_mutex); drm_device_set_unplugged(dev); if (dev->open_count == 0) { drm_put_dev(dev); } mutex_unlock(&drm_global_mutex); } EXPORT_SYMBOL(drm_unplug_dev); /* * DRM internal mount * We want to be able to allocate our own "struct address_space" to control * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow * stand-alone address_space objects, so we need an underlying inode. As there * is no way to allocate an independent inode easily, we need a fake internal * VFS mount-point. * * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() * frees it again. You are allowed to use iget() and iput() to get references to * the inode. But each drm_fs_inode_new() call must be paired with exactly one * drm_fs_inode_free() call (which does not have to be the last iput()). * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it * between multiple inode-users. You could, technically, call * iget() + drm_fs_inode_free() directly after alloc and sometime later do an * iput(), but this way you'd end up with a new vfsmount for each inode. */ static int drm_fs_cnt; static struct vfsmount *drm_fs_mnt; static const struct dentry_operations drm_fs_dops = { .d_dname = simple_dname, }; static const struct super_operations drm_fs_sops = { .statfs = simple_statfs, }; static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { return mount_pseudo(fs_type, "drm:", &drm_fs_sops, &drm_fs_dops, 0x010203ff); } static struct file_system_type drm_fs_type = { .name = "drm", .owner = THIS_MODULE, .mount = drm_fs_mount, .kill_sb = kill_anon_super, }; static struct inode *drm_fs_inode_new(void) { struct inode *inode; int r; r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); if (r < 0) { DRM_ERROR("Cannot mount pseudo fs: %d\n", r); return ERR_PTR(r); } inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); if (IS_ERR(inode)) simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); return inode; } static void drm_fs_inode_free(struct inode *inode) { if (inode) { iput(inode); simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); } } /** * drm_dev_alloc - Allocate new DRM device * @driver: DRM driver to allocate device for * @parent: Parent device object * * Allocate and initialize a new DRM device. No device registration is done. * Call drm_dev_register() to advertice the device to user space and register it * with other core subsystems. This should be done last in the device * initialization sequence to make sure userspace can't access an inconsistent * state. * * The initial ref-count of the object is 1. Use drm_dev_ref() and * drm_dev_unref() to take and drop further ref-counts. * * Note that for purely virtual devices @parent can be NULL. * * RETURNS: * Pointer to new DRM device, or NULL if out of memory. */ struct drm_device *drm_dev_alloc(struct drm_driver *driver, struct device *parent) { struct drm_device *dev; int ret; dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (!dev) return NULL; kref_init(&dev->ref); dev->dev = parent; dev->driver = driver; INIT_LIST_HEAD(&dev->filelist); INIT_LIST_HEAD(&dev->ctxlist); INIT_LIST_HEAD(&dev->vmalist); INIT_LIST_HEAD(&dev->maplist); INIT_LIST_HEAD(&dev->vblank_event_list); spin_lock_init(&dev->buf_lock); spin_lock_init(&dev->event_lock); mutex_init(&dev->struct_mutex); mutex_init(&dev->filelist_mutex); mutex_init(&dev->ctxlist_mutex); mutex_init(&dev->master_mutex); dev->anon_inode = drm_fs_inode_new(); if (IS_ERR(dev->anon_inode)) { ret = PTR_ERR(dev->anon_inode); DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); goto err_free; } if (drm_core_check_feature(dev, DRIVER_MODESET)) { ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); if (ret) goto err_minors; WARN_ON(driver->suspend || driver->resume); } if (drm_core_check_feature(dev, DRIVER_RENDER)) { ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); if (ret) goto err_minors; } ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); if (ret) goto err_minors; if (drm_ht_create(&dev->map_hash, 12)) goto err_minors; drm_legacy_ctxbitmap_init(dev); if (drm_core_check_feature(dev, DRIVER_GEM)) { ret = drm_gem_init(dev); if (ret) { DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); goto err_ctxbitmap; } } if (parent) { ret = drm_dev_set_unique(dev, dev_name(parent)); if (ret) goto err_setunique; } return dev; err_setunique: if (drm_core_check_feature(dev, DRIVER_GEM)) drm_gem_destroy(dev); err_ctxbitmap: drm_legacy_ctxbitmap_cleanup(dev); drm_ht_remove(&dev->map_hash); err_minors: drm_minor_free(dev, DRM_MINOR_LEGACY); drm_minor_free(dev, DRM_MINOR_RENDER); drm_minor_free(dev, DRM_MINOR_CONTROL); drm_fs_inode_free(dev->anon_inode); err_free: mutex_destroy(&dev->master_mutex); kfree(dev); return NULL; } EXPORT_SYMBOL(drm_dev_alloc); static void drm_dev_release(struct kref *ref) { struct drm_device *dev = container_of(ref, struct drm_device, ref); if (drm_core_check_feature(dev, DRIVER_GEM)) drm_gem_destroy(dev); drm_legacy_ctxbitmap_cleanup(dev); drm_ht_remove(&dev->map_hash); drm_fs_inode_free(dev->anon_inode); drm_minor_free(dev, DRM_MINOR_LEGACY); drm_minor_free(dev, DRM_MINOR_RENDER); drm_minor_free(dev, DRM_MINOR_CONTROL); mutex_destroy(&dev->master_mutex); kfree(dev->unique); kfree(dev); } /** * drm_dev_ref - Take reference of a DRM device * @dev: device to take reference of or NULL * * This increases the ref-count of @dev by one. You *must* already own a * reference when calling this. Use drm_dev_unref() to drop this reference * again. * * This function never fails. However, this function does not provide *any* * guarantee whether the device is alive or running. It only provides a * reference to the object and the memory associated with it. */ void drm_dev_ref(struct drm_device *dev) { if (dev) kref_get(&dev->ref); } EXPORT_SYMBOL(drm_dev_ref); /** * drm_dev_unref - Drop reference of a DRM device * @dev: device to drop reference of or NULL * * This decreases the ref-count of @dev by one. The device is destroyed if the * ref-count drops to zero. */ void drm_dev_unref(struct drm_device *dev) { if (dev) kref_put(&dev->ref, drm_dev_release); } EXPORT_SYMBOL(drm_dev_unref); /** * drm_dev_register - Register DRM device * @dev: Device to register * @flags: Flags passed to the driver's .load() function * * Register the DRM device @dev with the system, advertise device to user-space * and start normal device operation. @dev must be allocated via drm_dev_alloc() * previously. Right after drm_dev_register() the driver should call * drm_connector_register_all() to register all connectors in sysfs. This is * a separate call for backward compatibility with drivers still using * the deprecated ->load() callback, where connectors are registered from within * the ->load() callback. * * Never call this twice on any device! * * NOTE: To ensure backward compatibility with existing drivers method this * function calls the ->load() method after registering the device nodes, * creating race conditions. Usage of the ->load() methods is therefore * deprecated, drivers must perform all initialization before calling * drm_dev_register(). * * RETURNS: * 0 on success, negative error code on failure. */ int drm_dev_register(struct drm_device *dev, unsigned long flags) { int ret; mutex_lock(&drm_global_mutex); ret = drm_minor_register(dev, DRM_MINOR_CONTROL); if (ret) goto err_minors; ret = drm_minor_register(dev, DRM_MINOR_RENDER); if (ret) goto err_minors; ret = drm_minor_register(dev, DRM_MINOR_LEGACY); if (ret) goto err_minors; if (dev->driver->load) { ret = dev->driver->load(dev, flags); if (ret) goto err_minors; } ret = 0; goto out_unlock; err_minors: drm_minor_unregister(dev, DRM_MINOR_LEGACY); drm_minor_unregister(dev, DRM_MINOR_RENDER); drm_minor_unregister(dev, DRM_MINOR_CONTROL); out_unlock: mutex_unlock(&drm_global_mutex); return ret; } EXPORT_SYMBOL(drm_dev_register); /** * drm_dev_unregister - Unregister DRM device * @dev: Device to unregister * * Unregister the DRM device from the system. This does the reverse of * drm_dev_register() but does not deallocate the device. The caller must call * drm_dev_unref() to drop their final reference. * * This should be called first in the device teardown code to make sure * userspace can't access the device instance any more. */ void drm_dev_unregister(struct drm_device *dev) { struct drm_map_list *r_list, *list_temp; drm_lastclose(dev); if (dev->driver->unload) dev->driver->unload(dev); if (dev->agp) drm_pci_agp_destroy(dev); drm_vblank_cleanup(dev); list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) drm_legacy_rmmap(dev, r_list->map); drm_minor_unregister(dev, DRM_MINOR_LEGACY); drm_minor_unregister(dev, DRM_MINOR_RENDER); drm_minor_unregister(dev, DRM_MINOR_CONTROL); } EXPORT_SYMBOL(drm_dev_unregister); /** * drm_dev_set_unique - Set the unique name of a DRM device * @dev: device of which to set the unique name * @name: unique name * * Sets the unique name of a DRM device using the specified string. Drivers * can use this at driver probe time if the unique name of the devices they * drive is static. * * Return: 0 on success or a negative error code on failure. */ int drm_dev_set_unique(struct drm_device *dev, const char *name) { kfree(dev->unique); dev->unique = kstrdup(name, GFP_KERNEL); return dev->unique ? 0 : -ENOMEM; } EXPORT_SYMBOL(drm_dev_set_unique); #endif /* * DRM Core * The DRM core module initializes all global DRM objects and makes them * available to drivers. Once setup, drivers can probe their respective * devices. * Currently, core management includes: * - The "DRM-Global" key/value database * - Global ID management for connectors * - DRM major number allocation * - DRM minor management * - DRM sysfs class * - DRM debugfs root * * Furthermore, the DRM core provides dynamic char-dev lookups. For each * interface registered on a DRM device, you can request minor numbers from DRM * core. DRM core takes care of major-number management and char-dev * registration. A stub ->open() callback forwards any open() requests to the * registered minor. */ #if 0 static int drm_stub_open(struct inode *inode, struct file *filp) { const struct file_operations *new_fops; struct drm_minor *minor; int err; DRM_DEBUG("\n"); mutex_lock(&drm_global_mutex); minor = drm_minor_acquire(iminor(inode)); if (IS_ERR(minor)) { err = PTR_ERR(minor); goto out_unlock; } new_fops = fops_get(minor->dev->driver->fops); if (!new_fops) { err = -ENODEV; goto out_release; } replace_fops(filp, new_fops); if (filp->f_op->open) err = filp->f_op->open(inode, filp); else err = 0; out_release: drm_minor_release(minor); out_unlock: mutex_unlock(&drm_global_mutex); return err; } static const struct file_operations drm_stub_fops = { .owner = THIS_MODULE, .open = drm_stub_open, .llseek = noop_llseek, }; static int __init drm_core_init(void) { int ret = -ENOMEM; drm_global_init(); drm_connector_ida_init(); idr_init(&drm_minors_idr); if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) goto err_p1; ret = drm_sysfs_init(); if (ret < 0) { printk(KERN_ERR "DRM: Error creating drm class.\n"); goto err_p2; } drm_debugfs_root = debugfs_create_dir("dri", NULL); if (!drm_debugfs_root) { DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); ret = -1; goto err_p3; } DRM_INFO("Initialized %s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); return 0; err_p3: drm_sysfs_destroy(); err_p2: unregister_chrdev(DRM_MAJOR, "drm"); idr_destroy(&drm_minors_idr); err_p1: return ret; } static void __exit drm_core_exit(void) { debugfs_remove(drm_debugfs_root); drm_sysfs_destroy(); unregister_chrdev(DRM_MAJOR, "drm"); drm_connector_ida_destroy(); idr_destroy(&drm_minors_idr); } module_init(drm_core_init); module_exit(drm_core_exit); #endif #include #include #include #include #include static int drm_load(struct drm_device *dev); drm_pci_id_list_t *drm_find_description(int vendor, int device, drm_pci_id_list_t *idlist); #define DRIVER_SOFTC(unit) \ ((struct drm_device *)devclass_get_softc(drm_devclass, unit)) static int drm_modevent(module_t mod, int type, void *data) { switch (type) { case MOD_LOAD: TUNABLE_INT_FETCH("drm.debug", &drm_debug); break; } return (0); } static moduledata_t drm_mod = { "drm", drm_modevent, 0 }; DECLARE_MODULE(drm, drm_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); MODULE_VERSION(drm, 1); MODULE_DEPEND(drm, agp, 1, 1, 1); MODULE_DEPEND(drm, pci, 1, 1, 1); MODULE_DEPEND(drm, iicbus, 1, 1, 1); static struct dev_ops drm_cdevsw = { { "drm", 0, D_TRACKCLOSE | D_MPSAFE }, .d_open = drm_open, .d_close = drm_close, .d_read = drm_read, .d_ioctl = drm_ioctl, .d_kqfilter = drm_kqfilter, .d_mmap = drm_mmap, .d_mmap_single = drm_mmap_single, }; SYSCTL_NODE(_hw, OID_AUTO, drm, CTLFLAG_RW, NULL, "DRM device"); SYSCTL_INT(_hw_drm, OID_AUTO, debug, CTLFLAG_RW, &drm_debug, 0, "DRM debugging"); int drm_probe(device_t kdev, drm_pci_id_list_t *idlist) { drm_pci_id_list_t *id_entry; int vendor, device; vendor = pci_get_vendor(kdev); device = pci_get_device(kdev); if (pci_get_class(kdev) != PCIC_DISPLAY) return ENXIO; id_entry = drm_find_description(vendor, device, idlist); if (id_entry != NULL) { if (!device_get_desc(kdev)) { device_set_desc(kdev, id_entry->name); DRM_DEBUG("desc : %s\n", device_get_desc(kdev)); } return 0; } return ENXIO; } int drm_attach(device_t kdev, drm_pci_id_list_t *idlist) { struct drm_device *dev; drm_pci_id_list_t *id_entry; int unit, error; unit = device_get_unit(kdev); dev = device_get_softc(kdev); /* Initialize Linux struct device */ dev->dev = kzalloc(sizeof(struct device), GFP_KERNEL); if (!strcmp(device_get_name(kdev), "drmsub")) dev->dev->bsddev = device_get_parent(kdev); else dev->dev->bsddev = kdev; dev->pci_domain = pci_get_domain(dev->dev->bsddev); dev->pci_bus = pci_get_bus(dev->dev->bsddev); dev->pci_slot = pci_get_slot(dev->dev->bsddev); dev->pci_func = pci_get_function(dev->dev->bsddev); drm_init_pdev(dev->dev->bsddev, &dev->pdev); id_entry = drm_find_description(dev->pdev->vendor, dev->pdev->device, idlist); dev->id_entry = id_entry; /* Print the contents of pdev struct. */ drm_print_pdev(dev->pdev); lockinit(&dev->dev_lock, "drmdev", 0, LK_CANRECURSE); lwkt_serialize_init(&dev->irq_lock); lockinit(&dev->event_lock, "drmev", 0, LK_CANRECURSE); lockinit(&dev->struct_mutex, "drmslk", 0, LK_CANRECURSE); error = drm_load(dev); if (error) goto error; error = drm_create_cdevs(kdev); error: return (error); } int drm_create_cdevs(device_t kdev) { struct drm_device *dev; int error, unit; unit = device_get_unit(kdev); dev = device_get_softc(kdev); dev->devnode = make_dev(&drm_cdevsw, unit, DRM_DEV_UID, DRM_DEV_GID, DRM_DEV_MODE, "dri/card%d", unit); error = 0; if (error == 0) dev->devnode->si_drv1 = dev; return (error); } #ifndef DRM_DEV_NAME #define DRM_DEV_NAME "drm" #endif devclass_t drm_devclass; drm_pci_id_list_t *drm_find_description(int vendor, int device, drm_pci_id_list_t *idlist) { int i = 0; for (i = 0; idlist[i].vendor != 0; i++) { if ((idlist[i].vendor == vendor) && ((idlist[i].device == device) || (idlist[i].device == 0))) { return &idlist[i]; } } return NULL; } static int drm_load(struct drm_device *dev) { int i, retcode; DRM_DEBUG("\n"); INIT_LIST_HEAD(&dev->maplist); drm_sysctl_init(dev); INIT_LIST_HEAD(&dev->filelist); dev->counters = 6; dev->types[0] = _DRM_STAT_LOCK; dev->types[1] = _DRM_STAT_OPENS; dev->types[2] = _DRM_STAT_CLOSES; dev->types[3] = _DRM_STAT_IOCTLS; dev->types[4] = _DRM_STAT_LOCKS; dev->types[5] = _DRM_STAT_UNLOCKS; for (i = 0; i < ARRAY_SIZE(dev->counts); i++) atomic_set(&dev->counts[i], 0); INIT_LIST_HEAD(&dev->vblank_event_list); if (drm_core_check_feature(dev, DRIVER_USE_AGP)) { if (drm_pci_device_is_agp(dev)) dev->agp = drm_agp_init(dev); } if (dev->driver->driver_features & DRIVER_GEM) { retcode = drm_gem_init(dev); if (retcode != 0) { DRM_ERROR("Cannot initialize graphics execution " "manager (GEM)\n"); goto error1; } } if (dev->driver->load != NULL) { DRM_LOCK(dev); /* Shared code returns -errno. */ retcode = -dev->driver->load(dev, dev->id_entry->driver_private); if (pci_enable_busmaster(dev->dev->bsddev)) DRM_ERROR("Request to enable bus-master failed.\n"); DRM_UNLOCK(dev); if (retcode != 0) goto error1; } DRM_INFO("Initialized %s %d.%d.%d %s\n", dev->driver->name, dev->driver->major, dev->driver->minor, dev->driver->patchlevel, dev->driver->date); return 0; error1: drm_gem_destroy(dev); drm_sysctl_cleanup(dev); DRM_LOCK(dev); drm_lastclose(dev); DRM_UNLOCK(dev); if (dev->devnode != NULL) destroy_dev(dev->devnode); lockuninit(&dev->vbl_lock); lockuninit(&dev->dev_lock); lockuninit(&dev->event_lock); lockuninit(&dev->struct_mutex); return retcode; } /* * Stub is needed for devfs */ int drm_close(struct dev_close_args *ap) { return 0; } /* XXX: this is supposed to be drm_release() */ void drm_cdevpriv_dtor(void *cd) { struct drm_file *file_priv = cd; struct drm_device *dev = file_priv->dev; DRM_DEBUG("open_count = %d\n", dev->open_count); DRM_LOCK(dev); if (dev->driver->preclose != NULL) dev->driver->preclose(dev, file_priv); /* ======================================================== * Begin inline drm_release */ DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", DRM_CURRENTPID, (long)dev->dev, dev->open_count); if (dev->driver->driver_features & DRIVER_GEM) drm_gem_release(dev, file_priv); if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) drm_legacy_reclaim_buffers(dev, file_priv); funsetown(&dev->buf_sigio); if (dev->driver->postclose != NULL) dev->driver->postclose(dev, file_priv); list_del(&file_priv->lhead); /* ======================================================== * End inline drm_release */ atomic_inc(&dev->counts[_DRM_STAT_CLOSES]); device_unbusy(dev->dev->bsddev); if (--dev->open_count == 0) { drm_lastclose(dev); } DRM_UNLOCK(dev); } int drm_add_busid_modesetting(struct drm_device *dev, struct sysctl_ctx_list *ctx, struct sysctl_oid *top) { struct sysctl_oid *oid; ksnprintf(dev->busid_str, sizeof(dev->busid_str), "pci:%04x:%02x:%02x.%d", dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func); oid = SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(top), OID_AUTO, "busid", CTLFLAG_RD, dev->busid_str, 0, NULL); if (oid == NULL) return (ENOMEM); dev->modesetting = (dev->driver->driver_features & DRIVER_MODESET) != 0; oid = SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(top), OID_AUTO, "modesetting", CTLFLAG_RD, &dev->modesetting, 0, NULL); if (oid == NULL) return (ENOMEM); return (0); } int drm_mmap_single(struct dev_mmap_single_args *ap) { struct drm_device *dev; struct cdev *kdev = ap->a_head.a_dev; vm_ooffset_t *offset = ap->a_offset; vm_size_t size = ap->a_size; struct vm_object **obj_res = ap->a_object; int nprot = ap->a_nprot; dev = drm_get_device_from_kdev(kdev); if (dev->drm_ttm_bdev != NULL) { return (ttm_bo_mmap_single(dev->drm_ttm_bdev, offset, size, obj_res, nprot)); } else if ((dev->driver->driver_features & DRIVER_GEM) != 0) { return (drm_gem_mmap_single(dev, offset, size, obj_res, nprot)); } else { return (ENODEV); } } static int drm_core_init(void *arg) { drm_global_init(); DRM_INFO("Initialized %s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); return 0; } static void drm_core_exit(void *arg) { drm_global_release(); } SYSINIT(drm_register, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, drm_core_init, NULL); SYSUNINIT(drm_unregister, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, drm_core_exit, NULL); #include /* * Check if dmi_system_id structure matches system DMI data */ static bool dmi_found(const struct dmi_system_id *dsi) { int i, slot; bool found = false; char *sys_vendor, *board_vendor, *product_name, *board_name; sys_vendor = kgetenv("smbios.system.maker"); board_vendor = kgetenv("smbios.planar.maker"); product_name = kgetenv("smbios.system.product"); board_name = kgetenv("smbios.planar.product"); for (i = 0; i < NELEM(dsi->matches); i++) { slot = dsi->matches[i].slot; switch (slot) { case DMI_NONE: break; case DMI_SYS_VENDOR: if (sys_vendor != NULL && !strcmp(sys_vendor, dsi->matches[i].substr)) break; else goto done; case DMI_BOARD_VENDOR: if (board_vendor != NULL && !strcmp(board_vendor, dsi->matches[i].substr)) break; else goto done; case DMI_PRODUCT_NAME: if (product_name != NULL && !strcmp(product_name, dsi->matches[i].substr)) break; else goto done; case DMI_BOARD_NAME: if (board_name != NULL && !strcmp(board_name, dsi->matches[i].substr)) break; else goto done; default: goto done; } } found = true; done: if (sys_vendor != NULL) kfreeenv(sys_vendor); if (board_vendor != NULL) kfreeenv(board_vendor); if (product_name != NULL) kfreeenv(product_name); if (board_name != NULL) kfreeenv(board_name); return found; } int dmi_check_system(const struct dmi_system_id *sysid) { const struct dmi_system_id *dsi; int num = 0; for (dsi = sysid; dsi->matches[0].slot != 0 ; dsi++) { if (dmi_found(dsi)) { num++; if (dsi->callback && dsi->callback(dsi)) break; } } return (num); }