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authorGareth Hughes <gareth@users.sourceforge.net>2001-02-15 08:12:14 +0000
committerGareth Hughes <gareth@users.sourceforge.net>2001-02-15 08:12:14 +0000
commit360475376c5a597caf4a981c934a6b0d783fa94d (patch)
tree433f6970813deb74a2c8e1636b772a1f8567b267 /linux/drm_auth.h
parent38c22bc4883ac201bde7f5f130a72acd1be68ec5 (diff)
Merge mga-1-0-0-branch into trunk.
Diffstat (limited to 'linux/drm_auth.h')
-rw-r--r--linux/drm_auth.h162
1 files changed, 162 insertions, 0 deletions
diff --git a/linux/drm_auth.h b/linux/drm_auth.h
new file mode 100644
index 00000000..2636e617
--- /dev/null
+++ b/linux/drm_auth.h
@@ -0,0 +1,162 @@
+/* drm_auth.h -- IOCTLs for authentication -*- linux-c -*-
+ * 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.
+ *
+ * Authors:
+ * Rickard E. (Rik) Faith <faith@valinux.com>
+ * Gareth Hughes <gareth@valinux.com>
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+static int DRM(hash_magic)(drm_magic_t magic)
+{
+ return magic & (DRM_HASH_SIZE-1);
+}
+
+static drm_file_t *DRM(find_file)(drm_device_t *dev, drm_magic_t magic)
+{
+ drm_file_t *retval = NULL;
+ drm_magic_entry_t *pt;
+ int hash = DRM(hash_magic)(magic);
+
+ down(&dev->struct_sem);
+ for (pt = dev->magiclist[hash].head; pt; pt = pt->next) {
+ if (pt->magic == magic) {
+ retval = pt->priv;
+ break;
+ }
+ }
+ up(&dev->struct_sem);
+ return retval;
+}
+
+int DRM(add_magic)(drm_device_t *dev, drm_file_t *priv, drm_magic_t magic)
+{
+ int hash;
+ drm_magic_entry_t *entry;
+
+ DRM_DEBUG("%d\n", magic);
+
+ hash = DRM(hash_magic)(magic);
+ entry = DRM(alloc)(sizeof(*entry), DRM_MEM_MAGIC);
+ if (!entry) return -ENOMEM;
+ entry->magic = magic;
+ entry->priv = priv;
+ entry->next = NULL;
+
+ down(&dev->struct_sem);
+ if (dev->magiclist[hash].tail) {
+ dev->magiclist[hash].tail->next = entry;
+ dev->magiclist[hash].tail = entry;
+ } else {
+ dev->magiclist[hash].head = entry;
+ dev->magiclist[hash].tail = entry;
+ }
+ up(&dev->struct_sem);
+
+ return 0;
+}
+
+int DRM(remove_magic)(drm_device_t *dev, drm_magic_t magic)
+{
+ drm_magic_entry_t *prev = NULL;
+ drm_magic_entry_t *pt;
+ int hash;
+
+ DRM_DEBUG("%d\n", magic);
+ hash = DRM(hash_magic)(magic);
+
+ down(&dev->struct_sem);
+ for (pt = dev->magiclist[hash].head; pt; prev = pt, pt = pt->next) {
+ if (pt->magic == magic) {
+ if (dev->magiclist[hash].head == pt) {
+ dev->magiclist[hash].head = pt->next;
+ }
+ if (dev->magiclist[hash].tail == pt) {
+ dev->magiclist[hash].tail = prev;
+ }
+ if (prev) {
+ prev->next = pt->next;
+ }
+ up(&dev->struct_sem);
+ return 0;
+ }
+ }
+ up(&dev->struct_sem);
+
+ DRM(free)(pt, sizeof(*pt), DRM_MEM_MAGIC);
+
+ return -EINVAL;
+}
+
+int DRM(getmagic)(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ static drm_magic_t sequence = 0;
+ static spinlock_t lock = SPIN_LOCK_UNLOCKED;
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->dev;
+ drm_auth_t auth;
+
+ /* Find unique magic */
+ if (priv->magic) {
+ auth.magic = 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));
+ priv->magic = auth.magic;
+ DRM(add_magic)(dev, priv, auth.magic);
+ }
+
+ DRM_DEBUG("%u\n", auth.magic);
+ if (copy_to_user((drm_auth_t *)arg, &auth, sizeof(auth)))
+ return -EFAULT;
+ return 0;
+}
+
+int DRM(authmagic)(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->dev;
+ drm_auth_t auth;
+ drm_file_t *file;
+
+ if (copy_from_user(&auth, (drm_auth_t *)arg, sizeof(auth)))
+ return -EFAULT;
+ 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;
+}