vmwgfx: Fix confusion caused by using "fence" in various places

This is needed before we introduce the fence objects.
Otherwise this will be even more confusing. The plan is to use the following:

seqno: A 32-bit sequence number that may be passed in the fifo.
marker: Objects, carrying a seqno, that track fifo submission time. They
are used for fifo lag based throttling.
fence objects: Kernel space objects, possibly accessible from user-space and
carrying a 32-bit seqno together with signaled status.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 0 insertions, 173 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
deleted file mode 100644
index 61eacc1b5ca3..000000000000
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
+++ /dev/null
@@ -1,173 +0,0 @@
-/**************************************************************************
- *
- * Copyright (C) 2010 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.
- *
- **************************************************************************/
-
-
-#include "vmwgfx_drv.h"
-
-struct vmw_fence {
-	struct list_head head;
-	uint32_t sequence;
-	struct timespec submitted;
-};
-
-void vmw_fence_queue_init(struct vmw_fence_queue *queue)
-{
-	INIT_LIST_HEAD(&queue->head);
-	queue->lag = ns_to_timespec(0);
-	getrawmonotonic(&queue->lag_time);
-	spin_lock_init(&queue->lock);
-}
-
-void vmw_fence_queue_takedown(struct vmw_fence_queue *queue)
-{
-	struct vmw_fence *fence, *next;
-
-	spin_lock(&queue->lock);
-	list_for_each_entry_safe(fence, next, &queue->head, head) {
-		kfree(fence);
-	}
-	spin_unlock(&queue->lock);
-}
-
-int vmw_fence_push(struct vmw_fence_queue *queue,
-		   uint32_t sequence)
-{
-	struct vmw_fence *fence = kmalloc(sizeof(*fence), GFP_KERNEL);
-
-	if (unlikely(!fence))
-		return -ENOMEM;
-
-	fence->sequence = sequence;
-	getrawmonotonic(&fence->submitted);
-	spin_lock(&queue->lock);
-	list_add_tail(&fence->head, &queue->head);
-	spin_unlock(&queue->lock);
-
-	return 0;
-}
-
-int vmw_fence_pull(struct vmw_fence_queue *queue,
-		   uint32_t signaled_sequence)
-{
-	struct vmw_fence *fence, *next;
-	struct timespec now;
-	bool updated = false;
-
-	spin_lock(&queue->lock);
-	getrawmonotonic(&now);
-
-	if (list_empty(&queue->head)) {
-		queue->lag = ns_to_timespec(0);
-		queue->lag_time = now;
-		updated = true;
-		goto out_unlock;
-	}
-
-	list_for_each_entry_safe(fence, next, &queue->head, head) {
-		if (signaled_sequence - fence->sequence > (1 << 30))
-			continue;
-
-		queue->lag = timespec_sub(now, fence->submitted);
-		queue->lag_time = now;
-		updated = true;
-		list_del(&fence->head);
-		kfree(fence);
-	}
-
-out_unlock:
-	spin_unlock(&queue->lock);
-
-	return (updated) ? 0 : -EBUSY;
-}
-
-static struct timespec vmw_timespec_add(struct timespec t1,
-					struct timespec t2)
-{
-	t1.tv_sec += t2.tv_sec;
-	t1.tv_nsec += t2.tv_nsec;
-	if (t1.tv_nsec >= 1000000000L) {
-		t1.tv_sec += 1;
-		t1.tv_nsec -= 1000000000L;
-	}
-
-	return t1;
-}
-
-static struct timespec vmw_fifo_lag(struct vmw_fence_queue *queue)
-{
-	struct timespec now;
-
-	spin_lock(&queue->lock);
-	getrawmonotonic(&now);
-	queue->lag = vmw_timespec_add(queue->lag,
-				      timespec_sub(now, queue->lag_time));
-	queue->lag_time = now;
-	spin_unlock(&queue->lock);
-	return queue->lag;
-}
-
-
-static bool vmw_lag_lt(struct vmw_fence_queue *queue,
-		       uint32_t us)
-{
-	struct timespec lag, cond;
-
-	cond = ns_to_timespec((s64) us * 1000);
-	lag = vmw_fifo_lag(queue);
-	return (timespec_compare(&lag, &cond) < 1);
-}
-
-int vmw_wait_lag(struct vmw_private *dev_priv,
-		 struct vmw_fence_queue *queue, uint32_t us)
-{
-	struct vmw_fence *fence;
-	uint32_t sequence;
-	int ret;
-
-	while (!vmw_lag_lt(queue, us)) {
-		spin_lock(&queue->lock);
-		if (list_empty(&queue->head))
-			sequence = atomic_read(&dev_priv->fence_seq);
-		else {
-			fence = list_first_entry(&queue->head,
-						 struct vmw_fence, head);
-			sequence = fence->sequence;
-		}
-		spin_unlock(&queue->lock);
-
-		ret = vmw_wait_fence(dev_priv, false, sequence, true,
-				     3*HZ);
-
-		if (unlikely(ret != 0))
-			return ret;
-
-		(void) vmw_fence_pull(queue, sequence);
-	}
-	return 0;
-}
-
-