| /** |
| * \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); |
| |
| 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_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); |
| |
| 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); |