1 files changed, 0 insertions, 199 deletions
diff --git a/sys/dev/drm/drm_lock.c b/sys/dev/drm/drm_lock.c
deleted file mode 100644
index 28573c8c4f27..000000000000
--- a/sys/dev/drm/drm_lock.c
+++ /dev/null
@@ -1,199 +0,0 @@
-/*-
- * 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("$FreeBSD$");
-
-/** @file drm_lock.c
- * Implementation of the ioctls and other support code for dealing with the
- * hardware lock.
- *
- * The DRM hardware lock is a shared structure between the kernel and userland.
- *
- * On uncontended access where the new context was the last context, the
- * client may take the lock without dropping down into the kernel, using atomic
- * compare-and-set.
- *
- * If the client finds during compare-and-set that it was not the last owner
- * of the lock, it calls the DRM lock ioctl, which may sleep waiting for the
- * lock, and may have side-effects of kernel-managed context switching.
- *
- * When the client releases the lock, if the lock is marked as being contended
- * by another client, then the DRM unlock ioctl is called so that the
- * contending client may be woken up.
- */
-
-#include "dev/drm/drmP.h"
-
-int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
-	struct drm_lock *lock = data;
-	int ret = 0;
-
-	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 (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) &&
-	    lock->context < 0)
-		return EINVAL;
-
-	DRM_LOCK();
-	for (;;) {
-		if (drm_lock_take(&dev->lock, lock->context)) {
-			dev->lock.file_priv = file_priv;
-			dev->lock.lock_time = jiffies;
-			atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
-			break;  /* Got lock */
-		}
-
-		/* Contention */
-		ret = mtx_sleep((void *)&dev->lock.lock_queue, &dev->dev_lock,
-		    PCATCH, "drmlk2", 0);
-		if (ret != 0)
-			break;
-	}
-	DRM_UNLOCK();
-
-	if (ret == ERESTART)
-		DRM_DEBUG("restarting syscall\n");
-	else
-		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(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
-	struct drm_lock *lock = data;
-
-	DRM_DEBUG("%d (pid %d) requests unlock (0x%08x), flags = 0x%08x\n",
-	    lock->context, DRM_CURRENTPID, dev->lock.hw_lock->lock,
-	    lock->flags);
-
-	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->lock, DRM_KERNEL_CONTEXT);
-
-	if (drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT)) {
-		DRM_ERROR("\n");
-	}
-	DRM_UNLOCK();
-
-	return 0;
-}
-
-int drm_lock_take(struct drm_lock_data *lock_data, unsigned int context)
-{
-	volatile unsigned int *lock = &lock_data->hw_lock->lock;
-	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(struct drm_lock_data *lock_data, unsigned int context)
-{
-	volatile unsigned int *lock = &lock_data->hw_lock->lock;
-	unsigned int old, new;
-
-	lock_data->file_priv = NULL;
-	do {
-		old = *lock;
-		new = context | _DRM_LOCK_HELD;
-	} while (!atomic_cmpset_int(lock, old, new));
-
-	return 1;
-}
-
-int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context)
-{
-	volatile unsigned int *lock = &lock_data->hw_lock->lock;
-	unsigned int old, new;
-
-	lock_data->file_priv = 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 *)&lock_data->lock_queue);
-	return 0;
-}