diff options
author | Adam Jackson <ajax@theobromine.nwnk.net> | 2006-07-19 16:19:25 -0400 |
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committer | Adam Jackson <ajax@theobromine.nwnk.net> | 2006-07-19 16:19:25 -0400 |
commit | 6677e2a10b820a5ccfd375cc627b8e41453a71da (patch) | |
tree | 2f7f388e3450f644d84f2ef4c083314aeb57e886 /linux/drm_auth.h | |
parent | af7b89d7246efbed7d05c38fcaa6a13c4b89db90 (diff) |
Delete the pre-core DRM code with extreme prejudice.
Diffstat (limited to 'linux/drm_auth.h')
-rw-r--r-- | linux/drm_auth.h | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/linux/drm_auth.h b/linux/drm_auth.h deleted file mode 100644 index fe099871..00000000 --- a/linux/drm_auth.h +++ /dev/null @@ -1,230 +0,0 @@ -/** - * \file drm_auth.h - * 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" - -/** - * Generate a hash key from a magic. - * - * \param magic magic. - * \return hash key. - * - * The key is the modulus of the hash table size, #DRM_HASH_SIZE, which must be - * a power of 2. - */ -static int DRM(hash_magic)(drm_magic_t magic) -{ - return magic & (DRM_HASH_SIZE-1); -} - -/** - * 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_sem - * lock. - */ -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; -} - -/** - * 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_sem lock. - */ -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; - memset(entry, 0, sizeof(*entry)); - 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; -} - -/** - * 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_sem lock. - */ -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; -} - -/** - * Get a unique magic number (ioctl). - * - * \param inode device inode. - * \param filp file pointer. - * \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 - * filp. - */ -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 __user *)arg, &auth, sizeof(auth))) - return -EFAULT; - return 0; -} - -/** - * Authenticate with a magic. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg pointer to a drm_auth structure. - * \return zero if authentication successed, or a negative number otherwise. - * - * Checks if \p filp is associated with the magic number passed in \arg. - */ -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 __user *)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; -} |