/** * \file drm_stub.h * Stub support * * \author Rickard E. (Rik) Faith */ /* * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org * * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * 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 unsigned int drm_debug = 0; /* 1 to enable debug output */ EXPORT_SYMBOL(drm_debug); unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */ EXPORT_SYMBOL(drm_rnodes); unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ EXPORT_SYMBOL(drm_vblank_offdelay); unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ EXPORT_SYMBOL(drm_timestamp_precision); /* * Default to use monotonic timestamps for wait-for-vblank and page-flip * complete events. */ unsigned int drm_timestamp_monotonic = 1; MODULE_AUTHOR(CORE_AUTHOR); MODULE_DESCRIPTION(CORE_DESC); MODULE_LICENSE("GPL and additional rights"); MODULE_PARM_DESC(debug, "Enable debug output"); MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API"); MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]"); MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); module_param_named(debug, drm_debug, int, 0600); module_param_named(rnodes, drm_rnodes, int, 0600); module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); struct idr drm_minors_idr; struct class *drm_class; struct dentry *drm_debugfs_root; int drm_err(const char *func, const char *format, ...) { struct va_format vaf; va_list args; int r; va_start(args, format); vaf.fmt = format; vaf.va = &args; r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf); va_end(args); return r; } EXPORT_SYMBOL(drm_err); void drm_ut_debug_printk(unsigned int request_level, const char *prefix, const char *function_name, const char *format, ...) { struct va_format vaf; va_list args; if (drm_debug & request_level) { va_start(args, format); vaf.fmt = format; vaf.va = &args; if (function_name) printk(KERN_DEBUG "[%s:%s], %pV", prefix, function_name, &vaf); else printk(KERN_DEBUG "%pV", &vaf); va_end(args); } } EXPORT_SYMBOL(drm_ut_debug_printk); 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); drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER); INIT_LIST_HEAD(&master->magicfree); master->minor = minor; list_add_tail(&master->head, &minor->master_list); 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_magic_entry *pt, *next; struct drm_device *dev = master->minor->dev; struct drm_map_list *r_list, *list_temp; list_del(&master->head); if (dev->driver->master_destroy) dev->driver->master_destroy(dev, master); list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { if (r_list->master == master) { drm_rmmap_locked(dev, r_list->map); r_list = NULL; } } if (master->unique) { kfree(master->unique); master->unique = NULL; master->unique_len = 0; } kfree(dev->devname); dev->devname = NULL; list_for_each_entry_safe(pt, next, &master->magicfree, head) { list_del(&pt->head); drm_ht_remove_item(&master->magiclist, &pt->hash_item); kfree(pt); } drm_ht_remove(&master->magiclist); kfree(master); } void drm_master_put(struct drm_master **master) { kref_put(&(*master)->refcount, drm_master_destroy); *master = NULL; } EXPORT_SYMBOL(drm_master_put); int drm_setmaster_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { int ret = 0; if (file_priv->is_master) return 0; if (file_priv->minor->master && file_priv->minor->master != file_priv->master) return -EINVAL; if (!file_priv->master) return -EINVAL; if (file_priv->minor->master) return -EINVAL; mutex_lock(&dev->struct_mutex); file_priv->minor->master = drm_master_get(file_priv->master); file_priv->is_master = 1; if (dev->driver->master_set) { ret = dev->driver->master_set(dev, file_priv, false); if (unlikely(ret != 0)) { file_priv->is_master = 0; drm_master_put(&file_priv->minor->master); } } mutex_unlock(&dev->struct_mutex); return ret; } int drm_dropmaster_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { if (!file_priv->is_master) return -EINVAL; if (!file_priv->minor->master) return -EINVAL; mutex_lock(&dev->struct_mutex); if (dev->driver->master_drop) dev->driver->master_drop(dev, file_priv, false); drm_master_put(&file_priv->minor->master); file_priv->is_master = 0; mutex_unlock(&dev->struct_mutex); return 0; } 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; minor = kzalloc(sizeof(*minor), GFP_KERNEL); if (!minor) return -ENOMEM; minor->type = type; minor->dev = dev; INIT_LIST_HEAD(&minor->master_list); *drm_minor_get_slot(dev, type) = minor; return 0; } static void drm_minor_free(struct drm_device *dev, unsigned int type) { struct drm_minor **slot; slot = drm_minor_get_slot(dev, type); if (*slot) { kfree(*slot); *slot = NULL; } } static int drm_minor_register(struct drm_device *dev, unsigned int type) { struct drm_minor *new_minor; int ret; int minor_id; DRM_DEBUG("\n"); new_minor = *drm_minor_get_slot(dev, type); if (!new_minor) return 0; minor_id = idr_alloc(&drm_minors_idr, NULL, 64 * type, 64 * (type + 1), GFP_KERNEL); if (minor_id < 0) return minor_id; new_minor->index = minor_id; idr_replace(&drm_minors_idr, new_minor, minor_id); ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); if (ret) { DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); goto err_id; } ret = drm_sysfs_device_add(new_minor); if (ret) { DRM_ERROR("DRM: Error sysfs_device_add.\n"); goto err_debugfs; } DRM_DEBUG("new minor assigned %d\n", minor_id); return 0; err_debugfs: drm_debugfs_cleanup(new_minor); err_id: idr_remove(&drm_minors_idr, minor_id); return ret; } static void drm_minor_unregister(struct drm_device *dev, unsigned int type) { struct drm_minor *minor; minor = *drm_minor_get_slot(dev, type); if (!minor || !minor->kdev) return; drm_debugfs_cleanup(minor); drm_sysfs_device_remove(minor); idr_remove(&drm_minors_idr, minor->index); } /** * 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; minor = idr_find(&drm_minors_idr, minor_id); if (!minor) return ERR_PTR(-ENODEV); drm_dev_ref(minor->dev); 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); } /** * Called via drm_exit() at module unload time or when pci device is * unplugged. * * Cleans up all DRM device, calling drm_lastclose(). * */ 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_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. * * The initial ref-count of the object is 1. Use drm_dev_ref() and * drm_dev_unref() to take and drop further ref-counts. * * 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->count_lock); spin_lock_init(&dev->event_lock); mutex_init(&dev->struct_mutex); mutex_init(&dev->ctxlist_mutex); if (drm_core_check_feature(dev, DRIVER_MODESET)) { ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); if (ret) goto err_minors; } if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) { 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; ret = drm_ctxbitmap_init(dev); if (ret) { DRM_ERROR("Cannot allocate memory for context bitmap.\n"); goto err_ht; } if (driver->driver_features & DRIVER_GEM) { ret = drm_gem_init(dev); if (ret) { DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); goto err_ctxbitmap; } } return dev; err_ctxbitmap: drm_ctxbitmap_cleanup(dev); err_ht: 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); 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 (dev->driver->driver_features & DRIVER_GEM) drm_gem_destroy(dev); drm_ctxbitmap_cleanup(dev); drm_ht_remove(&dev->map_hash); drm_minor_free(dev, DRM_MINOR_LEGACY); drm_minor_free(dev, DRM_MINOR_RENDER); drm_minor_free(dev, DRM_MINOR_CONTROL); kfree(dev->devname); 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 * * 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. * * Never call this twice on any device! * * 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; } /* setup grouping for legacy outputs */ if (drm_core_check_feature(dev, DRIVER_MODESET)) { ret = drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); if (ret) goto err_unload; } ret = 0; goto out_unlock; err_unload: if (dev->driver->unload) dev->driver->unload(dev); 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. */ 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_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);