1 files changed, 0 insertions, 294 deletions
diff --git a/drivers/gpu/drm/vmwgfx/ttm_lock.c b/drivers/gpu/drm/vmwgfx/ttm_lock.c
deleted file mode 100644
index 16b2083cb9d4..000000000000
--- a/drivers/gpu/drm/vmwgfx/ttm_lock.c
+++ /dev/null
@@ -1,294 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 OR MIT */
-/**************************************************************************
- *
- * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
- * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDERS, AUTHORS 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: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
- */
-
-#include <drm/ttm/ttm_module.h>
-#include <linux/atomic.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/sched/signal.h>
-#include "ttm_lock.h"
-#include "ttm_object.h"
-
-#define TTM_WRITE_LOCK_PENDING    (1 << 0)
-#define TTM_VT_LOCK_PENDING       (1 << 1)
-#define TTM_SUSPEND_LOCK_PENDING  (1 << 2)
-#define TTM_VT_LOCK               (1 << 3)
-#define TTM_SUSPEND_LOCK          (1 << 4)
-
-void ttm_lock_init(struct ttm_lock *lock)
-{
-	spin_lock_init(&lock->lock);
-	init_waitqueue_head(&lock->queue);
-	lock->rw = 0;
-	lock->flags = 0;
-	lock->kill_takers = false;
-	lock->signal = SIGKILL;
-}
-
-void ttm_read_unlock(struct ttm_lock *lock)
-{
-	spin_lock(&lock->lock);
-	if (--lock->rw == 0)
-		wake_up_all(&lock->queue);
-	spin_unlock(&lock->lock);
-}
-
-static bool __ttm_read_lock(struct ttm_lock *lock)
-{
-	bool locked = false;
-
-	spin_lock(&lock->lock);
-	if (unlikely(lock->kill_takers)) {
-		send_sig(lock->signal, current, 0);
-		spin_unlock(&lock->lock);
-		return false;
-	}
-	if (lock->rw >= 0 && lock->flags == 0) {
-		++lock->rw;
-		locked = true;
-	}
-	spin_unlock(&lock->lock);
-	return locked;
-}
-
-int ttm_read_lock(struct ttm_lock *lock, bool interruptible)
-{
-	int ret = 0;
-
-	if (interruptible)
-		ret = wait_event_interruptible(lock->queue,
-					       __ttm_read_lock(lock));
-	else
-		wait_event(lock->queue, __ttm_read_lock(lock));
-	return ret;
-}
-
-static bool __ttm_read_trylock(struct ttm_lock *lock, bool *locked)
-{
-	bool block = true;
-
-	*locked = false;
-
-	spin_lock(&lock->lock);
-	if (unlikely(lock->kill_takers)) {
-		send_sig(lock->signal, current, 0);
-		spin_unlock(&lock->lock);
-		return false;
-	}
-	if (lock->rw >= 0 && lock->flags == 0) {
-		++lock->rw;
-		block = false;
-		*locked = true;
-	} else if (lock->flags == 0) {
-		block = false;
-	}
-	spin_unlock(&lock->lock);
-
-	return !block;
-}
-
-int ttm_read_trylock(struct ttm_lock *lock, bool interruptible)
-{
-	int ret = 0;
-	bool locked;
-
-	if (interruptible)
-		ret = wait_event_interruptible
-			(lock->queue, __ttm_read_trylock(lock, &locked));
-	else
-		wait_event(lock->queue, __ttm_read_trylock(lock, &locked));
-
-	if (unlikely(ret != 0)) {
-		BUG_ON(locked);
-		return ret;
-	}
-
-	return (locked) ? 0 : -EBUSY;
-}
-
-void ttm_write_unlock(struct ttm_lock *lock)
-{
-	spin_lock(&lock->lock);
-	lock->rw = 0;
-	wake_up_all(&lock->queue);
-	spin_unlock(&lock->lock);
-}
-
-static bool __ttm_write_lock(struct ttm_lock *lock)
-{
-	bool locked = false;
-
-	spin_lock(&lock->lock);
-	if (unlikely(lock->kill_takers)) {
-		send_sig(lock->signal, current, 0);
-		spin_unlock(&lock->lock);
-		return false;
-	}
-	if (lock->rw == 0 && ((lock->flags & ~TTM_WRITE_LOCK_PENDING) == 0)) {
-		lock->rw = -1;
-		lock->flags &= ~TTM_WRITE_LOCK_PENDING;
-		locked = true;
-	} else {
-		lock->flags |= TTM_WRITE_LOCK_PENDING;
-	}
-	spin_unlock(&lock->lock);
-	return locked;
-}
-
-int ttm_write_lock(struct ttm_lock *lock, bool interruptible)
-{
-	int ret = 0;
-
-	if (interruptible) {
-		ret = wait_event_interruptible(lock->queue,
-					       __ttm_write_lock(lock));
-		if (unlikely(ret != 0)) {
-			spin_lock(&lock->lock);
-			lock->flags &= ~TTM_WRITE_LOCK_PENDING;
-			wake_up_all(&lock->queue);
-			spin_unlock(&lock->lock);
-		}
-	} else
-		wait_event(lock->queue, __ttm_write_lock(lock));
-
-	return ret;
-}
-
-static int __ttm_vt_unlock(struct ttm_lock *lock)
-{
-	int ret = 0;
-
-	spin_lock(&lock->lock);
-	if (unlikely(!(lock->flags & TTM_VT_LOCK)))
-		ret = -EINVAL;
-	lock->flags &= ~TTM_VT_LOCK;
-	wake_up_all(&lock->queue);
-	spin_unlock(&lock->lock);
-
-	return ret;
-}
-
-static void ttm_vt_lock_remove(struct ttm_base_object **p_base)
-{
-	struct ttm_base_object *base = *p_base;
-	struct ttm_lock *lock = container_of(base, struct ttm_lock, base);
-	int ret;
-
-	*p_base = NULL;
-	ret = __ttm_vt_unlock(lock);
-	BUG_ON(ret != 0);
-}
-
-static bool __ttm_vt_lock(struct ttm_lock *lock)
-{
-	bool locked = false;
-
-	spin_lock(&lock->lock);
-	if (lock->rw == 0) {
-		lock->flags &= ~TTM_VT_LOCK_PENDING;
-		lock->flags |= TTM_VT_LOCK;
-		locked = true;
-	} else {
-		lock->flags |= TTM_VT_LOCK_PENDING;
-	}
-	spin_unlock(&lock->lock);
-	return locked;
-}
-
-int ttm_vt_lock(struct ttm_lock *lock,
-		bool interruptible,
-		struct ttm_object_file *tfile)
-{
-	int ret = 0;
-
-	if (interruptible) {
-		ret = wait_event_interruptible(lock->queue,
-					       __ttm_vt_lock(lock));
-		if (unlikely(ret != 0)) {
-			spin_lock(&lock->lock);
-			lock->flags &= ~TTM_VT_LOCK_PENDING;
-			wake_up_all(&lock->queue);
-			spin_unlock(&lock->lock);
-			return ret;
-		}
-	} else
-		wait_event(lock->queue, __ttm_vt_lock(lock));
-
-	/*
-	 * Add a base-object, the destructor of which will
-	 * make sure the lock is released if the client dies
-	 * while holding it.
-	 */
-
-	ret = ttm_base_object_init(tfile, &lock->base, false,
-				   ttm_lock_type, &ttm_vt_lock_remove, NULL);
-	if (ret)
-		(void)__ttm_vt_unlock(lock);
-	else
-		lock->vt_holder = tfile;
-
-	return ret;
-}
-
-int ttm_vt_unlock(struct ttm_lock *lock)
-{
-	return ttm_ref_object_base_unref(lock->vt_holder,
-					 lock->base.handle, TTM_REF_USAGE);
-}
-
-void ttm_suspend_unlock(struct ttm_lock *lock)
-{
-	spin_lock(&lock->lock);
-	lock->flags &= ~TTM_SUSPEND_LOCK;
-	wake_up_all(&lock->queue);
-	spin_unlock(&lock->lock);
-}
-
-static bool __ttm_suspend_lock(struct ttm_lock *lock)
-{
-	bool locked = false;
-
-	spin_lock(&lock->lock);
-	if (lock->rw == 0) {
-		lock->flags &= ~TTM_SUSPEND_LOCK_PENDING;
-		lock->flags |= TTM_SUSPEND_LOCK;
-		locked = true;
-	} else {
-		lock->flags |= TTM_SUSPEND_LOCK_PENDING;
-	}
-	spin_unlock(&lock->lock);
-	return locked;
-}
-
-void ttm_suspend_lock(struct ttm_lock *lock)
-{
-	wait_event(lock->queue, __ttm_suspend_lock(lock));
-}