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authordrochner <drochner@NetBSD.org>2007-03-20 18:05:25 +0000
committerdrochner <drochner@NetBSD.org>2007-03-20 18:05:25 +0000
commit2d9e04fc35ca8ddfed6238ce480db06ec7d7d76e (patch)
treeeba0e8e954885cfb2067de846ecfd99f432a0b9c /sys/dev/drm/drm_auth.c
parentf8ef9d143184e5e22d51bde02aecb408dc9e3925 (diff)
Import DRM drivers, brought into shape by Yorick Hardy, posted to tech-x11.
Minor modifications by me: -use an mi device major number -(coarsly) divided into pci card specific and less specific parts, moved the latter to dev/drm -renamed autoconf attributes to reflect this Todo: -adapt all card frontends but i915 to drm include file location -review the mtrr change -make the change to agp_i810.c coexist with the fix for buggy VESA BIOSes which is commented out temporarily -RCS IDs etc style stuff -LKM support (rescan support for vga) -test
Diffstat (limited to 'sys/dev/drm/drm_auth.c')
-rw-r--r--sys/dev/drm/drm_auth.c181
1 files changed, 181 insertions, 0 deletions
diff --git a/sys/dev/drm/drm_auth.c b/sys/dev/drm/drm_auth.c
new file mode 100644
index 00000000000..704f9dc1b5c
--- /dev/null
+++ b/sys/dev/drm/drm_auth.c
@@ -0,0 +1,181 @@
+/* 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>
+ *
+ */
+
+#include <sys/cdefs.h>
+/*
+__FBSDID("$FreeBSD: src/sys/dev/drm/drm_auth.c,v 1.2 2005/11/28 23:13:52 anholt Exp $");
+*/
+
+#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;
+
+ hash = drm_hash_magic(magic);
+
+ DRM_LOCK();
+ for (pt = dev->magiclist[hash].head; pt; pt = pt->next) {
+ if (pt->magic == magic) {
+ retval = pt->priv;
+ break;
+ }
+ }
+ DRM_UNLOCK();
+ return retval;
+}
+
+static 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 = malloc(sizeof(*entry), M_DRM, M_ZERO | M_NOWAIT);
+ if (!entry) return DRM_ERR(ENOMEM);
+ entry->magic = magic;
+ entry->priv = priv;
+ entry->next = NULL;
+
+ DRM_LOCK();
+ 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;
+ }
+ DRM_UNLOCK();
+
+ return 0;
+}
+
+static 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);
+
+ DRM_LOCK();
+ 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;
+ }
+ DRM_UNLOCK();
+ return 0;
+ }
+ }
+ DRM_UNLOCK();
+
+ free(pt, M_DRM);
+ return DRM_ERR(EINVAL);
+}
+
+int drm_getmagic(DRM_IOCTL_ARGS)
+{
+ DRM_DEVICE;
+ static drm_magic_t sequence = 0;
+ drm_auth_t auth;
+ drm_file_t *priv;
+
+ DRM_LOCK();
+#ifdef __FreeBSD__
+ priv = drm_find_file_by_proc(dev, p);
+#elif defined(__NetBSD__)
+ priv = drm_find_file_by_proc(dev, p->l_proc);
+#endif
+ DRM_UNLOCK();
+ if (priv == NULL) {
+ DRM_ERROR("can't find authenticator\n");
+ return EINVAL;
+ }
+
+ /* Find unique magic */
+ if (priv->magic) {
+ auth.magic = priv->magic;
+ } else {
+ do {
+ int old = sequence;
+
+ auth.magic = old+1;
+
+ if (!atomic_cmpset_int(&sequence, old, auth.magic))
+ continue;
+ } while (drm_find_file(dev, auth.magic));
+ priv->magic = auth.magic;
+ drm_add_magic(dev, priv, auth.magic);
+ }
+
+ DRM_DEBUG("%u\n", auth.magic);
+
+ DRM_COPY_TO_USER_IOCTL((drm_auth_t *)data, auth, sizeof(auth));
+
+ return 0;
+}
+
+int drm_authmagic(DRM_IOCTL_ARGS)
+{
+ drm_auth_t auth;
+ drm_file_t *file;
+ DRM_DEVICE;
+
+ DRM_COPY_FROM_USER_IOCTL(auth, (drm_auth_t *)data, sizeof(auth));
+
+ 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 DRM_ERR(EINVAL);
+}