WebSVN – Kolibri OS – Diff – /drivers/video/drm/drm_stub.c

-/**
- * \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.
+ *
+ * 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
  * 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
 EXPORT_SYMBOL(drm_debug);
 unsigned int drm_rnodes = 0;	/* 1 to enable experimental render nodes API */
+EXPORT_SYMBOL(drm_rnodes);
+/* 1 to allow user space to request universal planes (experimental) */
+unsigned int drm_universal_planes = 0;
-EXPORT_SYMBOL(drm_rnodes);
+EXPORT_SYMBOL(drm_universal_planes);
 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_precision = 20;  /* Default to 20 usecs. */
+ */
-EXPORT_SYMBOL(drm_timestamp_precision);
+unsigned int drm_timestamp_monotonic = 1;
 struct idr drm_minors_idr;
 	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, ...)
+void drm_ut_debug_printk(const char *function_name, const char *format, ...)
+{
 	struct va_format vaf;
 //       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;
+	}
+	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 (file_priv->is_master)
+		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);
+	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);
+		}
+	}
+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 (!file_priv->is_master)
+		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);
+	file_priv->is_master = 0;
+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;
+	minor = kzalloc(sizeof(*minor), GFP_KERNEL);
+	if (!minor)
+		return -ENOMEM;
+	minor->type = type;
+	minor->dev = dev;
+	*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) {
+		drm_mode_group_destroy(&(*slot)->mode_group);
+		kfree(*slot);
+		*slot = NULL;
+	}
+}
+static int drm_minor_register(struct drm_device *dev, unsigned int type)
+{
+	struct drm_minor *new_minor;
+	unsigned long flags;
+	int ret;
+	int minor_id;
+	DRM_DEBUG("\n");
+	new_minor = *drm_minor_get_slot(dev, type);
+	if (!new_minor)
+		return 0;
+	idr_preload(GFP_KERNEL);
+	spin_lock_irqsave(&drm_minor_lock, flags);
+	minor_id = idr_alloc(&drm_minors_idr,
+			     NULL,
+* type,
+* (type + 1),
+			     GFP_NOWAIT);
+	spin_unlock_irqrestore(&drm_minor_lock, flags);
+	idr_preload_end();
+	if (minor_id < 0)
+		return minor_id;
+	new_minor->index = 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;
+	}
+	/* replace NULL with @minor so lookups will succeed from now on */
+	spin_lock_irqsave(&drm_minor_lock, flags);
+	idr_replace(&drm_minors_idr, new_minor, new_minor->index);
+	spin_unlock_irqrestore(&drm_minor_lock, flags);
+	DRM_DEBUG("new minor assigned %d\n", minor_id);
+	return 0;
+err_debugfs:
+	drm_debugfs_cleanup(new_minor);
+err_id:
+	spin_lock_irqsave(&drm_minor_lock, flags);
+	idr_remove(&drm_minors_idr, minor_id);
+	spin_unlock_irqrestore(&drm_minor_lock, flags);
+	new_minor->index = 0;
+	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 || !minor->kdev)
+		return;
+	spin_lock_irqsave(&drm_minor_lock, flags);
+	idr_remove(&drm_minors_idr, minor->index);
+	spin_unlock_irqrestore(&drm_minor_lock, flags);
+	minor->index = 0;
+	drm_debugfs_cleanup(minor);
+	drm_sysfs_device_remove(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,
+x010203ff);
+}
+static struct file_system_type drm_fs_type = {
+	.name		= "drm",
+	.owner		= THIS_MODULE,
+	.mount		= drm_fs_mount,
+	.kill_sb	= kill_anon_super,
+};
+#endif
 int drm_fill_in_dev(struct drm_device *dev,
 			   const struct pci_device_id *ent,
 			   struct drm_driver *driver)
 {
+	int ret;
-	int retcode;
+	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->buf_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;
 //	}
-    dev->driver = driver;
 	if (driver->driver_features & DRIVER_GEM) {
-		retcode = drm_gem_init(dev);
+	if (driver->driver_features & DRIVER_GEM) {
-		if (retcode) {
+		ret = drm_gem_init(dev);
-			DRM_ERROR("Cannot initialize graphics execution "
+		if (ret) {
-				  "manager (GEM)\n");
+			DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
-			goto error_out_unreg;
+			goto err_ctxbitmap;
+		}
+	}
 	return 0;
 static inline void clflush(volatile void *__p)
+{
     asm volatile("clflush %0" : "+m" (*(volatile char*)__p));
+}
-void
-drm_clflush_virt_range(char *addr, unsigned long length)
+void drm_clflush_virt_range(void *addr, unsigned long length)
+{
-{
+    char *tmp = addr;
-    char *end = addr + length;
+    char *end = tmp + length;
     mb();
-    for (; addr < end; addr += x86_clflush_size)
+    for (; tmp < end; tmp += x86_clflush_size)
-        clflush(addr);
+        clflush(tmp);
     clflush(end - 1);
     mb();
     return;
+}

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/drm_stub.c – Rev 4560 → 5060