drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \
drm_context.o drm_dma.o \
drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \
- drm_lock.o drm_memory.o drm_stub.o drm_vm.o \
+ drm_lock.o drm_memory.o drm_drv.o drm_vm.o \
drm_agpsupport.o drm_scatter.o drm_pci.o \
drm_platform.o drm_sysfs.o drm_hashtab.o drm_mm.o \
drm_crtc.o drm_modes.o drm_edid.o \
--- /dev/null
+/*
+ * 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 <faith@valinux.com>
+ *
+ * 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/debugfs.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/mount.h>
+#include <linux/slab.h>
+#include <drm/drmP.h>
+#include <drm/drm_core.h>
+#include "drm_legacy.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. */
+
+unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */
+
+/*
+ * 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);
+
+static DEFINE_SPINLOCK(drm_minor_lock);
+static struct idr drm_minors_idr;
+
+struct class *drm_class;
+static 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(const char *function_name, const char *format, ...)
+{
+ struct va_format vaf;
+ va_list args;
+
+ va_start(args, format);
+ vaf.fmt = format;
+ vaf.va = &args;
+
+ printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &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);
+ if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) {
+ kfree(master);
+ return NULL;
+ }
+ INIT_LIST_HEAD(&master->magicfree);
+ 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_magic_entry *pt, *next;
+ struct drm_device *dev = master->minor->dev;
+ struct drm_map_list *r_list, *list_temp;
+
+ mutex_lock(&dev->struct_mutex);
+ 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;
+ }
+
+ 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);
+
+ 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);
+
+int drm_setmaster_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ int ret = 0;
+
+ mutex_lock(&dev->master_mutex);
+ if (drm_is_master(file_priv))
+ goto out_unlock;
+
+ if (file_priv->minor->master) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ if (!file_priv->master) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ file_priv->minor->master = drm_master_get(file_priv->master);
+ if (dev->driver->master_set) {
+ ret = dev->driver->master_set(dev, file_priv, false);
+ if (unlikely(ret != 0))
+ drm_master_put(&file_priv->minor->master);
+ }
+
+out_unlock:
+ mutex_unlock(&dev->master_mutex);
+ return ret;
+}
+
+int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ int ret = -EINVAL;
+
+ mutex_lock(&dev->master_mutex);
+ if (!drm_is_master(file_priv))
+ goto out_unlock;
+
+ if (!file_priv->minor->master)
+ goto out_unlock;
+
+ ret = 0;
+ if (dev->driver->master_drop)
+ dev->driver->master_drop(dev, file_priv, false);
+ drm_master_put(&file_priv->minor->master);
+
+out_unlock:
+ mutex_unlock(&dev->master_mutex);
+ return ret;
+}
+
+/*
+ * 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;
+
+ drm_mode_group_destroy(&minor->mode_group);
+ 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);
+}
+
+/**
+ * drm_put_dev - Unregister and release a DRM device
+ * @dev: DRM device
+ *
+ * Called at module unload time or when a PCI device is unplugged.
+ *
+ * Use of this function is discouraged. It will eventually go away completely.
+ * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead.
+ *
+ * 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 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.
+ *
+ * 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->buf_lock);
+ spin_lock_init(&dev->event_lock);
+ mutex_init(&dev->struct_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;
+ }
+
+ 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;
+
+ ret = drm_legacy_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_legacy_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);
+ 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 (dev->driver->driver_features & 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.
+ *
+ * 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);
+
+/**
+ * drm_dev_set_unique - Set the unique name of a DRM device
+ * @dev: device of which to set the unique name
+ * @fmt: format string for unique name
+ *
+ * Sets the unique name of a DRM device using the specified format string and
+ * a variable list of arguments. 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 *fmt, ...)
+{
+ va_list ap;
+
+ kfree(dev->unique);
+
+ va_start(ap, fmt);
+ dev->unique = kvasprintf(GFP_KERNEL, fmt, ap);
+ va_end(ap);
+
+ return dev->unique ? 0 : -ENOMEM;
+}
+EXPORT_SYMBOL(drm_dev_set_unique);
+
+/*
+ * 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.
+ */
+
+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;
+
+ drm_class = drm_sysfs_create(THIS_MODULE, "drm");
+ if (IS_ERR(drm_class)) {
+ printk(KERN_ERR "DRM: Error creating drm class.\n");
+ ret = PTR_ERR(drm_class);
+ 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);
+++ /dev/null
-/*
- * 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 <faith@valinux.com>
- *
- * 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/debugfs.h>
-#include <linux/fs.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/mount.h>
-#include <linux/slab.h>
-#include <drm/drmP.h>
-#include <drm/drm_core.h>
-#include "drm_legacy.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. */
-
-unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */
-
-/*
- * 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);
-
-static DEFINE_SPINLOCK(drm_minor_lock);
-static struct idr drm_minors_idr;
-
-struct class *drm_class;
-static 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(const char *function_name, const char *format, ...)
-{
- struct va_format vaf;
- va_list args;
-
- va_start(args, format);
- vaf.fmt = format;
- vaf.va = &args;
-
- printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &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);
- if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) {
- kfree(master);
- return NULL;
- }
- INIT_LIST_HEAD(&master->magicfree);
- 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_magic_entry *pt, *next;
- struct drm_device *dev = master->minor->dev;
- struct drm_map_list *r_list, *list_temp;
-
- mutex_lock(&dev->struct_mutex);
- 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;
- }
-
- 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);
-
- 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);
-
-int drm_setmaster_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- int ret = 0;
-
- mutex_lock(&dev->master_mutex);
- if (drm_is_master(file_priv))
- goto out_unlock;
-
- if (file_priv->minor->master) {
- ret = -EINVAL;
- goto out_unlock;
- }
-
- if (!file_priv->master) {
- ret = -EINVAL;
- goto out_unlock;
- }
-
- file_priv->minor->master = drm_master_get(file_priv->master);
- if (dev->driver->master_set) {
- ret = dev->driver->master_set(dev, file_priv, false);
- if (unlikely(ret != 0))
- drm_master_put(&file_priv->minor->master);
- }
-
-out_unlock:
- mutex_unlock(&dev->master_mutex);
- return ret;
-}
-
-int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- int ret = -EINVAL;
-
- mutex_lock(&dev->master_mutex);
- if (!drm_is_master(file_priv))
- goto out_unlock;
-
- if (!file_priv->minor->master)
- goto out_unlock;
-
- ret = 0;
- if (dev->driver->master_drop)
- dev->driver->master_drop(dev, file_priv, false);
- drm_master_put(&file_priv->minor->master);
-
-out_unlock:
- mutex_unlock(&dev->master_mutex);
- return ret;
-}
-
-/*
- * 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;
-
- drm_mode_group_destroy(&minor->mode_group);
- 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);
-}
-
-/**
- * drm_put_dev - Unregister and release a DRM device
- * @dev: DRM device
- *
- * Called at module unload time or when a PCI device is unplugged.
- *
- * Use of this function is discouraged. It will eventually go away completely.
- * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead.
- *
- * 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 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.
- *
- * 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->buf_lock);
- spin_lock_init(&dev->event_lock);
- mutex_init(&dev->struct_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;
- }
-
- 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;
-
- ret = drm_legacy_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_legacy_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);
- 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 (dev->driver->driver_features & 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.
- *
- * 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);
-
-/**
- * drm_dev_set_unique - Set the unique name of a DRM device
- * @dev: device of which to set the unique name
- * @fmt: format string for unique name
- *
- * Sets the unique name of a DRM device using the specified format string and
- * a variable list of arguments. 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 *fmt, ...)
-{
- va_list ap;
-
- kfree(dev->unique);
-
- va_start(ap, fmt);
- dev->unique = kvasprintf(GFP_KERNEL, fmt, ap);
- va_end(ap);
-
- return dev->unique ? 0 : -ENOMEM;
-}
-EXPORT_SYMBOL(drm_dev_set_unique);
-
-/*
- * 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.
- */
-
-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;
-
- drm_class = drm_sysfs_create(THIS_MODULE, "drm");
- if (IS_ERR(drm_class)) {
- printk(KERN_ERR "DRM: Error creating drm class.\n");
- ret = PTR_ERR(drm_class);
- 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);
projects / cascardo / linux.git / commitdiff