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Diffstat (limited to 'drivers/char/drm/drm_auth.c')
-rw-r--r--drivers/char/drm/drm_auth.c190
1 files changed, 0 insertions, 190 deletions
diff --git a/drivers/char/drm/drm_auth.c b/drivers/char/drm/drm_auth.c
deleted file mode 100644
index a73462723d2..00000000000
--- a/drivers/char/drm/drm_auth.c
+++ /dev/null
@@ -1,190 +0,0 @@
-/**
- * \file drm_auth.c
- * IOCTLs for authentication
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com
- *
- * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
- * Copyright 2000 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
- * VA LINUX SYSTEMS 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 "drmP.h"
-
-/**
- * Find the file with the given magic number.
- *
- * \param dev DRM device.
- * \param magic magic number.
- *
- * Searches in drm_device::magiclist within all files with the same hash key
- * the one with matching magic number, while holding the drm_device::struct_mutex
- * lock.
- */
-static struct drm_file *drm_find_file(struct drm_device * dev, drm_magic_t magic)
-{
- struct drm_file *retval = NULL;
- struct drm_magic_entry *pt;
- struct drm_hash_item *hash;
-
- mutex_lock(&dev->struct_mutex);
- if (!drm_ht_find_item(&dev->magiclist, (unsigned long)magic, &hash)) {
- pt = drm_hash_entry(hash, struct drm_magic_entry, hash_item);
- retval = pt->priv;
- }
- mutex_unlock(&dev->struct_mutex);
- return retval;
-}
-
-/**
- * Adds a magic number.
- *
- * \param dev DRM device.
- * \param priv file private data.
- * \param magic magic number.
- *
- * Creates a drm_magic_entry structure and appends to the linked list
- * associated the magic number hash key in drm_device::magiclist, while holding
- * the drm_device::struct_mutex lock.
- */
-static int drm_add_magic(struct drm_device * dev, struct drm_file * priv,
- drm_magic_t magic)
-{
- struct drm_magic_entry *entry;
-
- DRM_DEBUG("%d\n", magic);
-
- entry = drm_alloc(sizeof(*entry), DRM_MEM_MAGIC);
- if (!entry)
- return -ENOMEM;
- memset(entry, 0, sizeof(*entry));
- entry->priv = priv;
-
- entry->hash_item.key = (unsigned long)magic;
- mutex_lock(&dev->struct_mutex);
- drm_ht_insert_item(&dev->magiclist, &entry->hash_item);
- list_add_tail(&entry->head, &dev->magicfree);
- mutex_unlock(&dev->struct_mutex);
-
- return 0;
-}
-
-/**
- * Remove a magic number.
- *
- * \param dev DRM device.
- * \param magic magic number.
- *
- * Searches and unlinks the entry in drm_device::magiclist with the magic
- * number hash key, while holding the drm_device::struct_mutex lock.
- */
-static int drm_remove_magic(struct drm_device * dev, drm_magic_t magic)
-{
- struct drm_magic_entry *pt;
- struct drm_hash_item *hash;
-
- DRM_DEBUG("%d\n", magic);
-
- mutex_lock(&dev->struct_mutex);
- if (drm_ht_find_item(&dev->magiclist, (unsigned long)magic, &hash)) {
- mutex_unlock(&dev->struct_mutex);
- return -EINVAL;
- }
- pt = drm_hash_entry(hash, struct drm_magic_entry, hash_item);
- drm_ht_remove_item(&dev->magiclist, hash);
- list_del(&pt->head);
- mutex_unlock(&dev->struct_mutex);
-
- drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
-
- return 0;
-}
-
-/**
- * Get a unique magic number (ioctl).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a resulting drm_auth structure.
- * \return zero on success, or a negative number on failure.
- *
- * If there is a magic number in drm_file::magic then use it, otherwise
- * searches an unique non-zero magic number and add it associating it with \p
- * file_priv.
- */
-int drm_getmagic(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- static drm_magic_t sequence = 0;
- static DEFINE_SPINLOCK(lock);
- struct drm_auth *auth = data;
-
- /* Find unique magic */
- if (file_priv->magic) {
- auth->magic = file_priv->magic;
- } else {
- do {
- spin_lock(&lock);
- if (!sequence)
- ++sequence; /* reserve 0 */
- auth->magic = sequence++;
- spin_unlock(&lock);
- } while (drm_find_file(dev, auth->magic));
- file_priv->magic = auth->magic;
- drm_add_magic(dev, file_priv, auth->magic);
- }
-
- DRM_DEBUG("%u\n", auth->magic);
-
- return 0;
-}
-
-/**
- * Authenticate with a magic.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_auth structure.
- * \return zero if authentication successed, or a negative number otherwise.
- *
- * Checks if \p file_priv is associated with the magic number passed in \arg.
- */
-int drm_authmagic(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_auth *auth = data;
- struct drm_file *file;
-
- DRM_DEBUG("%u\n", auth->magic);
- if ((file = drm_find_file(dev, auth->magic))) {
- file->authenticated = 1;
- drm_remove_magic(dev, auth->magic);
- return 0;
- }
- return -EINVAL;
-}