1/* SPDX-License-Identifier: GPL-2.0 OR MIT */
2/*
3 * Copyright 2021 VMware, Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use, copy,
9 * modify, merge, publish, distribute, sublicense, and/or sell copies
10 * of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 */
26
27#include "vmwgfx_drv.h"
28
29#include <drm/ttm/ttm_device.h>
30#include <drm/ttm/ttm_placement.h>
31#include <drm/ttm/ttm_resource.h>
32#include <linux/slab.h>
33
34
35static int vmw_sys_man_alloc(struct ttm_resource_manager *man,
36 struct ttm_buffer_object *bo,
37 const struct ttm_place *place,
38 struct ttm_resource **res)
39{
40 *res = kzalloc(sizeof(**res), GFP_KERNEL);
41 if (!*res)
42 return -ENOMEM;
43
44 ttm_resource_init(bo, place, res: *res);
45 return 0;
46}
47
48static void vmw_sys_man_free(struct ttm_resource_manager *man,
49 struct ttm_resource *res)
50{
51 ttm_resource_fini(man, res);
52 kfree(objp: res);
53}
54
55static const struct ttm_resource_manager_func vmw_sys_manager_func = {
56 .alloc = vmw_sys_man_alloc,
57 .free = vmw_sys_man_free,
58};
59
60int vmw_sys_man_init(struct vmw_private *dev_priv)
61{
62 struct ttm_device *bdev = &dev_priv->bdev;
63 struct ttm_resource_manager *man =
64 kzalloc(sizeof(*man), GFP_KERNEL);
65
66 if (!man)
67 return -ENOMEM;
68
69 man->use_tt = true;
70 man->func = &vmw_sys_manager_func;
71
72 ttm_resource_manager_init(man, bdev, size: 0);
73 ttm_set_driver_manager(bdev, VMW_PL_SYSTEM, manager: man);
74 ttm_resource_manager_set_used(man, used: true);
75 return 0;
76}
77
78void vmw_sys_man_fini(struct vmw_private *dev_priv)
79{
80 struct ttm_resource_manager *man = ttm_manager_type(bdev: &dev_priv->bdev,
81 VMW_PL_SYSTEM);
82
83 ttm_resource_manager_evict_all(bdev: &dev_priv->bdev, man);
84
85 ttm_resource_manager_set_used(man, used: false);
86 ttm_resource_manager_cleanup(man);
87
88 ttm_set_driver_manager(bdev: &dev_priv->bdev, VMW_PL_SYSTEM, NULL);
89 kfree(objp: man);
90}
91

source code of linux/drivers/gpu/drm/vmwgfx/vmwgfx_system_manager.c