/** * \file drm_stub.h * Stub support * * \author Rickard E. (Rik) Faith <faith@valinux.com> */ /* * 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 <linux/module.h> #include <linux/moduleparam.h> #include <linux/slab.h> #include <drm/drmP.h> #include <drm/drm_core.h> unsigned int drm_debug = 0; /* 1 to enable debug output */ EXPORT_SYMBOL(drm_debug); 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(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(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 proc_dir_entry *drm_proc_root; 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, ...) { va_list args; if (drm_debug & request_level) { if (function_name) printk(KERN_DEBUG "[%s:%s], ", prefix, function_name); va_start(args, format); vprintk(format, args); va_end(args); } } EXPORT_SYMBOL(drm_ut_debug_printk); static int drm_minor_get_id(struct drm_device *dev, int type) { int new_id; int ret; int base = 0, limit = 63; if (type == DRM_MINOR_CONTROL) { base += 64; limit = base + 127; } else if (type == DRM_MINOR_RENDER) { base += 128; limit = base + 255; } again: if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) { DRM_ERROR("Out of memory expanding drawable idr\n"); return -ENOMEM; } mutex_lock(&dev->struct_mutex); ret = idr_get_new_above(&drm_minors_idr, NULL, base, &new_id); mutex_unlock(&dev->struct_mutex); if (ret == -EAGAIN) goto again; else if (ret) return ret; if (new_id >= limit) { idr_remove(&drm_minors_idr, new_id); return -EINVAL; } return new_id; } 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; 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 0; } 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; } int drm_fill_in_dev(struct drm_device *dev, const struct pci_device_id *ent, struct drm_driver *driver) { int retcode; 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_ht_create(&dev->map_hash, 12)) { return -ENOMEM; } /* the DRM has 6 basic counters */ 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; dev->driver = driver; if (dev->driver->bus->agp_init) { retcode = dev->driver->bus->agp_init(dev); if (retcode) goto error_out_unreg; } retcode = drm_ctxbitmap_init(dev); if (retcode) { DRM_ERROR("Cannot allocate memory for context bitmap.\n"); goto error_out_unreg; } if (driver->driver_features & DRIVER_GEM) { retcode = drm_gem_init(dev); if (retcode) { DRM_ERROR("Cannot initialize graphics execution " "manager (GEM)\n"); goto error_out_unreg; } } return 0; error_out_unreg: drm_lastclose(dev); return retcode; } EXPORT_SYMBOL(drm_fill_in_dev); /** * Get a secondary minor number. * * \param dev device data structure * \param sec-minor structure to hold the assigned minor * \return negative number on failure. * * Search an empty entry and initialize it to the given parameters, and * create the proc init entry via proc_init(). This routines assigns * minor numbers to secondary heads of multi-headed cards */ int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type) { struct drm_minor *new_minor; int ret; int minor_id; DRM_DEBUG("\n"); minor_id = drm_minor_get_id(dev, type); if (minor_id < 0) return minor_id; new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL); if (!new_minor) { ret = -ENOMEM; goto err_idr; } new_minor->type = type; new_minor->device = MKDEV(DRM_MAJOR, minor_id); new_minor->dev = dev; new_minor->index = minor_id; INIT_LIST_HEAD(&new_minor->master_list); idr_replace(&drm_minors_idr, new_minor, minor_id); if (type == DRM_MINOR_LEGACY) { ret = drm_proc_init(new_minor, minor_id, drm_proc_root); if (ret) { DRM_ERROR("DRM: Failed to initialize /proc/dri.\n"); goto err_mem; } } else new_minor->proc_root = NULL; #if defined(CONFIG_DEBUG_FS) 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_g2; } #endif ret = drm_sysfs_device_add(new_minor); if (ret) { printk(KERN_ERR "DRM: Error sysfs_device_add.\n"); goto err_g2; } *minor = new_minor; DRM_DEBUG("new minor assigned %d\n", minor_id); return 0; err_g2: if (new_minor->type == DRM_MINOR_LEGACY) drm_proc_cleanup(new_minor, drm_proc_root); err_mem: kfree(new_minor); err_idr: idr_remove(&drm_minors_idr, minor_id); *minor = NULL; return ret; } EXPORT_SYMBOL(drm_get_minor); /** * Put a secondary minor number. * * \param sec_minor - structure to be released * \return always zero * * Cleans up the proc resources. Not legal for this to be the * last minor released. * */ int drm_put_minor(struct drm_minor **minor_p) { struct drm_minor *minor = *minor_p; DRM_DEBUG("release secondary minor %d\n", minor->index); if (minor->type == DRM_MINOR_LEGACY) drm_proc_cleanup(minor, drm_proc_root); #if defined(CONFIG_DEBUG_FS) drm_debugfs_cleanup(minor); #endif drm_sysfs_device_remove(minor); idr_remove(&drm_minors_idr, minor->index); kfree(minor); *minor_p = NULL; return 0; } EXPORT_SYMBOL(drm_put_minor); static void drm_unplug_minor(struct drm_minor *minor) { drm_sysfs_device_remove(minor); } /** * 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) { struct drm_driver *driver; struct drm_map_list *r_list, *list_temp; DRM_DEBUG("\n"); if (!dev) { DRM_ERROR("cleanup called no dev\n"); return; } driver = dev->driver; drm_lastclose(dev); if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && dev->agp && dev->agp->agp_mtrr >= 0) { int retval; retval = mtrr_del(dev->agp->agp_mtrr, dev->agp->agp_info.aper_base, dev->agp->agp_info.aper_size * 1024 * 1024); DRM_DEBUG("mtrr_del=%d\n", retval); } if (dev->driver->unload) dev->driver->unload(dev); if (drm_core_has_AGP(dev) && dev->agp) { kfree(dev->agp); dev->agp = NULL; } drm_vblank_cleanup(dev); list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) drm_rmmap(dev, r_list->map); drm_ht_remove(&dev->map_hash); drm_ctxbitmap_cleanup(dev); if (drm_core_check_feature(dev, DRIVER_MODESET)) drm_put_minor(&dev->control); if (driver->driver_features & DRIVER_GEM) drm_gem_destroy(dev); drm_put_minor(&dev->primary); list_del(&dev->driver_item); kfree(dev->devname); kfree(dev); } EXPORT_SYMBOL(drm_put_dev); void drm_unplug_dev(struct drm_device *dev) { /* for a USB device */ if (drm_core_check_feature(dev, DRIVER_MODESET)) drm_unplug_minor(dev->control); drm_unplug_minor(dev->primary); 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);