cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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drm_legacy_misc.c (2852B)

      1/*
      2 * \file drm_legacy_misc.c
      3 * Misc legacy support functions.
      4 *
      5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
      6 * \author Gareth Hughes <gareth@valinux.com>
      7 */
      8
      9/*
     10 * Created: Tue Feb  2 08:37:54 1999 by faith@valinux.com
     11 *
     12 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
     13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
     14 * All Rights Reserved.
     15 *
     16 * Permission is hereby granted, free of charge, to any person obtaining a
     17 * copy of this software and associated documentation files (the "Software"),
     18 * to deal in the Software without restriction, including without limitation
     19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     20 * and/or sell copies of the Software, and to permit persons to whom the
     21 * Software is furnished to do so, subject to the following conditions:
     22 *
     23 * The above copyright notice and this permission notice (including the next
     24 * paragraph) shall be included in all copies or substantial portions of the
     25 * Software.
     26 *
     27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
     31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     33 * OTHER DEALINGS IN THE SOFTWARE.
     34 */
     35
     36#include <drm/drm_device.h>
     37#include <drm/drm_drv.h>
     38#include <drm/drm_print.h>
     39
     40#include "drm_internal.h"
     41#include "drm_legacy.h"
     42
     43void drm_legacy_init_members(struct drm_device *dev)
     44{
     45	INIT_LIST_HEAD(&dev->ctxlist);
     46	INIT_LIST_HEAD(&dev->vmalist);
     47	INIT_LIST_HEAD(&dev->maplist);
     48	spin_lock_init(&dev->buf_lock);
     49	mutex_init(&dev->ctxlist_mutex);
     50}
     51
     52void drm_legacy_destroy_members(struct drm_device *dev)
     53{
     54	mutex_destroy(&dev->ctxlist_mutex);
     55}
     56
     57int drm_legacy_setup(struct drm_device * dev)
     58{
     59	int ret;
     60
     61	if (dev->driver->firstopen &&
     62	    drm_core_check_feature(dev, DRIVER_LEGACY)) {
     63		ret = dev->driver->firstopen(dev);
     64		if (ret != 0)
     65			return ret;
     66	}
     67
     68	ret = drm_legacy_dma_setup(dev);
     69	if (ret < 0)
     70		return ret;
     71
     72
     73	DRM_DEBUG("\n");
     74	return 0;
     75}
     76
     77void drm_legacy_dev_reinit(struct drm_device *dev)
     78{
     79	if (dev->irq_enabled)
     80		drm_legacy_irq_uninstall(dev);
     81
     82	mutex_lock(&dev->struct_mutex);
     83
     84	drm_legacy_agp_clear(dev);
     85
     86	drm_legacy_sg_cleanup(dev);
     87	drm_legacy_vma_flush(dev);
     88	drm_legacy_dma_takedown(dev);
     89
     90	mutex_unlock(&dev->struct_mutex);
     91
     92	dev->sigdata.lock = NULL;
     93
     94	dev->context_flag = 0;
     95	dev->last_context = 0;
     96	dev->if_version = 0;
     97
     98	DRM_DEBUG("lastclose completed\n");
     99}
    100
    101void drm_master_legacy_init(struct drm_master *master)
    102{
    103	spin_lock_init(&master->lock.spinlock);
    104	init_waitqueue_head(&master->lock.lock_queue);
    105}