diff options
Diffstat (limited to 'nx-X11/extras/drm/bsd-core/drm_lock.c')
| -rw-r--r-- | nx-X11/extras/drm/bsd-core/drm_lock.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/nx-X11/extras/drm/bsd-core/drm_lock.c b/nx-X11/extras/drm/bsd-core/drm_lock.c deleted file mode 100644 index d0e61d3ab..000000000 --- a/nx-X11/extras/drm/bsd-core/drm_lock.c +++ /dev/null @@ -1,177 +0,0 @@ -/* lock.c -- IOCTLs for locking -*- 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 "drmP.h" - -int drm_lock_take(__volatile__ unsigned int *lock, unsigned int context) -{ - unsigned int old, new; - - do { - old = *lock; - if (old & _DRM_LOCK_HELD) new = old | _DRM_LOCK_CONT; - else new = context | _DRM_LOCK_HELD; - } while (!atomic_cmpset_int(lock, old, new)); - - 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. */ -int drm_lock_transfer(drm_device_t *dev, - __volatile__ unsigned int *lock, unsigned int context) -{ - unsigned int old, new; - - dev->lock.filp = NULL; - do { - old = *lock; - new = context | _DRM_LOCK_HELD; - } while (!atomic_cmpset_int(lock, old, new)); - - return 1; -} - -int drm_lock_free(drm_device_t *dev, - __volatile__ unsigned int *lock, unsigned int context) -{ - unsigned int old, new; - - dev->lock.filp = NULL; - do { - old = *lock; - new = 0; - } while (!atomic_cmpset_int(lock, old, new)); - - 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; - } - DRM_WAKEUP_INT((void *)&dev->lock.lock_queue); - return 0; -} - -int drm_lock(DRM_IOCTL_ARGS) -{ - DRM_DEVICE; - drm_lock_t lock; - int ret = 0; - - DRM_COPY_FROM_USER_IOCTL(lock, (drm_lock_t *)data, sizeof(lock)); - - if (lock.context == DRM_KERNEL_CONTEXT) { - DRM_ERROR("Process %d using kernel context %d\n", - DRM_CURRENTPID, lock.context); - return EINVAL; - } - - DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n", - lock.context, DRM_CURRENTPID, dev->lock.hw_lock->lock, lock.flags); - - if (dev->driver.use_dma_queue && lock.context < 0) - return EINVAL; - - DRM_LOCK(); - for (;;) { - if (drm_lock_take(&dev->lock.hw_lock->lock, lock.context)) { - dev->lock.filp = (void *)(uintptr_t)DRM_CURRENTPID; - dev->lock.lock_time = jiffies; - atomic_inc(&dev->counts[_DRM_STAT_LOCKS]); - break; /* Got lock */ - } - - /* Contention */ -#if defined(__FreeBSD__) && __FreeBSD_version > 500000 - ret = msleep((void *)&dev->lock.lock_queue, &dev->dev_lock, - PZERO | PCATCH, "drmlk2", 0); -#else - ret = tsleep((void *)&dev->lock.lock_queue, PZERO | PCATCH, - "drmlk2", 0); -#endif - if (ret != 0) - break; - } - DRM_UNLOCK(); - DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock"); - - if (ret != 0) - return ret; - - /* XXX: Add signal blocking here */ - - if (dev->driver.dma_quiescent != NULL && - (lock.flags & _DRM_LOCK_QUIESCENT)) - dev->driver.dma_quiescent(dev); - - return 0; -} - -int drm_unlock(DRM_IOCTL_ARGS) -{ - DRM_DEVICE; - drm_lock_t lock; - - DRM_COPY_FROM_USER_IOCTL(lock, (drm_lock_t *)data, sizeof(lock)); - - if (lock.context == DRM_KERNEL_CONTEXT) { - DRM_ERROR("Process %d using kernel context %d\n", - DRM_CURRENTPID, lock.context); - return EINVAL; - } - - atomic_inc(&dev->counts[_DRM_STAT_UNLOCKS]); - - DRM_LOCK(); - drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT); - - if (drm_lock_free(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT)) { - DRM_ERROR("\n"); - } - DRM_UNLOCK(); - - return 0; -} |