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Diffstat (limited to 'nx-X11/extras/drm/linux/drm_lock.h')
-rw-r--r--nx-X11/extras/drm/linux/drm_lock.h168
1 files changed, 0 insertions, 168 deletions
diff --git a/nx-X11/extras/drm/linux/drm_lock.h b/nx-X11/extras/drm/linux/drm_lock.h
deleted file mode 100644
index 55fb29f39..000000000
--- a/nx-X11/extras/drm/linux/drm_lock.h
+++ /dev/null
@@ -1,168 +0,0 @@
-/**
- * \file drm_lock.h
- * IOCTLs for locking
- *
- * \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"
-
-/** No-op ioctl. */
-int DRM(noop)(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
-{
- DRM_DEBUG("\n");
- return 0;
-}
-
-/**
- * Take the heavyweight lock.
- *
- * \param lock lock pointer.
- * \param context locking context.
- * \return one if the lock is held, or zero otherwise.
- *
- * Attempt to mark the lock as held by the given context, via the \p cmpxchg instruction.
- */
-int DRM(lock_take)(__volatile__ unsigned int *lock, unsigned int context)
-{
- unsigned int old, new, prev;
-
- do {
- old = *lock;
- if (old & _DRM_LOCK_HELD) new = old | _DRM_LOCK_CONT;
- else new = context | _DRM_LOCK_HELD;
- prev = cmpxchg(lock, old, new);
- } while (prev != old);
- if (_DRM_LOCKING_CONTEXT(old) == context) {
- if (old & _DRM_LOCK_HELD) {
- if (context != DRM_KERNEL_CONTEXT) {
- DRM_ERROR("%d holds heavyweight lock\n",
- context);
- }
- return 0;
- }
- }
- if (new == (context | _DRM_LOCK_HELD)) {
- /* Have lock */
- return 1;
- }
- return 0;
-}
-
-/**
- * This takes a lock forcibly and hands it to context. Should ONLY be used
- * inside *_unlock to give lock to kernel before calling *_dma_schedule.
- *
- * \param dev DRM device.
- * \param lock lock pointer.
- * \param context locking context.
- * \return always one.
- *
- * Resets the lock file pointer.
- * Marks the lock as held by the given context, via the \p cmpxchg instruction.
- */
-int DRM(lock_transfer)(drm_device_t *dev,
- __volatile__ unsigned int *lock, unsigned int context)
-{
- unsigned int old, new, prev;
-
- dev->lock.filp = NULL;
- do {
- old = *lock;
- new = context | _DRM_LOCK_HELD;
- prev = cmpxchg(lock, old, new);
- } while (prev != old);
- return 1;
-}
-
-/**
- * Free lock.
- *
- * \param dev DRM device.
- * \param lock lock.
- * \param context context.
- *
- * Resets the lock file pointer.
- * Marks the lock as not held, via the \p cmpxchg instruction. Wakes any task
- * waiting on the lock queue.
- */
-int DRM(lock_free)(drm_device_t *dev,
- __volatile__ unsigned int *lock, unsigned int context)
-{
- unsigned int old, new, prev;
-
- dev->lock.filp = NULL;
- do {
- old = *lock;
- new = 0;
- prev = cmpxchg(lock, old, new);
- } while (prev != old);
- if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) {
- DRM_ERROR("%d freed heavyweight lock held by %d\n",
- context,
- _DRM_LOCKING_CONTEXT(old));
- return 1;
- }
- wake_up_interruptible(&dev->lock.lock_queue);
- return 0;
-}
-
-/**
- * If we get here, it means that the process has called DRM_IOCTL_LOCK
- * without calling DRM_IOCTL_UNLOCK.
- *
- * If the lock is not held, then let the signal proceed as usual. If the lock
- * is held, then set the contended flag and keep the signal blocked.
- *
- * \param priv pointer to a drm_sigdata structure.
- * \return one if the signal should be delivered normally, or zero if the
- * signal should be blocked.
- */
-int DRM(notifier)(void *priv)
-{
- drm_sigdata_t *s = (drm_sigdata_t *)priv;
- unsigned int old, new, prev;
-
-
- /* Allow signal delivery if lock isn't held */
- if (!s->lock || !_DRM_LOCK_IS_HELD(s->lock->lock)
- || _DRM_LOCKING_CONTEXT(s->lock->lock) != s->context) return 1;
-
- /* Otherwise, set flag to force call to
- drmUnlock */
- do {
- old = s->lock->lock;
- new = old | _DRM_LOCK_CONT;
- prev = cmpxchg(&s->lock->lock, old, new);
- } while (prev != old);
- return 0;
-}