diff options
Diffstat (limited to 'drivers/char/drm/gamma_lock.h')
| -rw-r--r-- | drivers/char/drm/gamma_lock.h | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/drivers/char/drm/gamma_lock.h b/drivers/char/drm/gamma_lock.h deleted file mode 100644 index ddec67e4ed16..000000000000 --- a/drivers/char/drm/gamma_lock.h +++ /dev/null | |||
| @@ -1,140 +0,0 @@ | |||
| 1 | /* lock.c -- IOCTLs for locking -*- linux-c -*- | ||
| 2 | * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com | ||
| 3 | * | ||
| 4 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. | ||
| 5 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | ||
| 6 | * All Rights Reserved. | ||
| 7 | * | ||
| 8 | * Permission is hereby granted, free of charge, to any person obtaining a | ||
| 9 | * copy of this software and associated documentation files (the "Software"), | ||
| 10 | * to deal in the Software without restriction, including without limitation | ||
| 11 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | ||
| 12 | * and/or sell copies of the Software, and to permit persons to whom the | ||
| 13 | * Software is furnished to do so, subject to the following conditions: | ||
| 14 | * | ||
| 15 | * The above copyright notice and this permission notice (including the next | ||
| 16 | * paragraph) shall be included in all copies or substantial portions of the | ||
| 17 | * Software. | ||
| 18 | * | ||
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
| 22 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | ||
| 23 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | ||
| 24 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | ||
| 25 | * OTHER DEALINGS IN THE SOFTWARE. | ||
| 26 | * | ||
| 27 | * Authors: | ||
| 28 | * Rickard E. (Rik) Faith <faith@valinux.com> | ||
| 29 | * Gareth Hughes <gareth@valinux.com> | ||
| 30 | */ | ||
| 31 | |||
| 32 | |||
| 33 | /* Gamma-specific code extracted from drm_lock.h: | ||
| 34 | */ | ||
| 35 | static int DRM(flush_queue)(drm_device_t *dev, int context) | ||
| 36 | { | ||
| 37 | DECLARE_WAITQUEUE(entry, current); | ||
| 38 | int ret = 0; | ||
| 39 | drm_queue_t *q = dev->queuelist[context]; | ||
| 40 | |||
| 41 | DRM_DEBUG("\n"); | ||
| 42 | |||
| 43 | atomic_inc(&q->use_count); | ||
| 44 | if (atomic_read(&q->use_count) > 1) { | ||
| 45 | atomic_inc(&q->block_write); | ||
| 46 | add_wait_queue(&q->flush_queue, &entry); | ||
| 47 | atomic_inc(&q->block_count); | ||
| 48 | for (;;) { | ||
| 49 | current->state = TASK_INTERRUPTIBLE; | ||
| 50 | if (!DRM_BUFCOUNT(&q->waitlist)) break; | ||
| 51 | schedule(); | ||
| 52 | if (signal_pending(current)) { | ||
| 53 | ret = -EINTR; /* Can't restart */ | ||
| 54 | break; | ||
| 55 | } | ||
| 56 | } | ||
| 57 | atomic_dec(&q->block_count); | ||
| 58 | current->state = TASK_RUNNING; | ||
| 59 | remove_wait_queue(&q->flush_queue, &entry); | ||
| 60 | } | ||
| 61 | atomic_dec(&q->use_count); | ||
| 62 | |||
| 63 | /* NOTE: block_write is still incremented! | ||
| 64 | Use drm_flush_unlock_queue to decrement. */ | ||
| 65 | return ret; | ||
| 66 | } | ||
| 67 | |||
| 68 | static int DRM(flush_unblock_queue)(drm_device_t *dev, int context) | ||
| 69 | { | ||
| 70 | drm_queue_t *q = dev->queuelist[context]; | ||
| 71 | |||
| 72 | DRM_DEBUG("\n"); | ||
| 73 | |||
| 74 | atomic_inc(&q->use_count); | ||
| 75 | if (atomic_read(&q->use_count) > 1) { | ||
| 76 | if (atomic_read(&q->block_write)) { | ||
| 77 | atomic_dec(&q->block_write); | ||
| 78 | wake_up_interruptible(&q->write_queue); | ||
| 79 | } | ||
| 80 | } | ||
| 81 | atomic_dec(&q->use_count); | ||
| 82 | return 0; | ||
| 83 | } | ||
| 84 | |||
| 85 | int DRM(flush_block_and_flush)(drm_device_t *dev, int context, | ||
| 86 | drm_lock_flags_t flags) | ||
| 87 | { | ||
| 88 | int ret = 0; | ||
| 89 | int i; | ||
| 90 | |||
| 91 | DRM_DEBUG("\n"); | ||
| 92 | |||
| 93 | if (flags & _DRM_LOCK_FLUSH) { | ||
| 94 | ret = DRM(flush_queue)(dev, DRM_KERNEL_CONTEXT); | ||
| 95 | if (!ret) ret = DRM(flush_queue)(dev, context); | ||
| 96 | } | ||
| 97 | if (flags & _DRM_LOCK_FLUSH_ALL) { | ||
| 98 | for (i = 0; !ret && i < dev->queue_count; i++) { | ||
| 99 | ret = DRM(flush_queue)(dev, i); | ||
| 100 | } | ||
| 101 | } | ||
| 102 | return ret; | ||
| 103 | } | ||
| 104 | |||
| 105 | int DRM(flush_unblock)(drm_device_t *dev, int context, drm_lock_flags_t flags) | ||
| 106 | { | ||
| 107 | int ret = 0; | ||
| 108 | int i; | ||
| 109 | |||
| 110 | DRM_DEBUG("\n"); | ||
| 111 | |||
| 112 | if (flags & _DRM_LOCK_FLUSH) { | ||
| 113 | ret = DRM(flush_unblock_queue)(dev, DRM_KERNEL_CONTEXT); | ||
| 114 | if (!ret) ret = DRM(flush_unblock_queue)(dev, context); | ||
| 115 | } | ||
| 116 | if (flags & _DRM_LOCK_FLUSH_ALL) { | ||
| 117 | for (i = 0; !ret && i < dev->queue_count; i++) { | ||
| 118 | ret = DRM(flush_unblock_queue)(dev, i); | ||
| 119 | } | ||
| 120 | } | ||
| 121 | |||
| 122 | return ret; | ||
| 123 | } | ||
| 124 | |||
| 125 | int DRM(finish)(struct inode *inode, struct file *filp, unsigned int cmd, | ||
| 126 | unsigned long arg) | ||
| 127 | { | ||
| 128 | drm_file_t *priv = filp->private_data; | ||
| 129 | drm_device_t *dev = priv->dev; | ||
| 130 | int ret = 0; | ||
| 131 | drm_lock_t lock; | ||
| 132 | |||
| 133 | DRM_DEBUG("\n"); | ||
| 134 | |||
| 135 | if (copy_from_user(&lock, (drm_lock_t __user *)arg, sizeof(lock))) | ||
| 136 | return -EFAULT; | ||
| 137 | ret = DRM(flush_block_and_flush)(dev, lock.context, lock.flags); | ||
| 138 | DRM(flush_unblock)(dev, lock.context, lock.flags); | ||
| 139 | return ret; | ||
| 140 | } | ||