1/*
2 * Copyright 2020 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Christian König
23 */
24
25#include <drm/ttm/ttm_resource.h>
26#include <drm/ttm/ttm_bo_driver.h>
27
28int ttm_resource_alloc(struct ttm_buffer_object *bo,
29		       const struct ttm_place *place,
30		       struct ttm_resource *res)
31{
32	struct ttm_resource_manager *man =
33		ttm_manager_type(bo->bdev, res->mem_type);
34
35	res->mm_node = NULL;
36	if (!man->func || !man->func->alloc)
37		return 0;
38
39	return man->func->alloc(man, bo, place, res);
40}
41
42void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource *res)
43{
44	struct ttm_resource_manager *man =
45		ttm_manager_type(bo->bdev, res->mem_type);
46
47	if (man->func && man->func->free)
48		man->func->free(man, res);
49
50	res->mm_node = NULL;
51	res->mem_type = TTM_PL_SYSTEM;
52}
53EXPORT_SYMBOL(ttm_resource_free);
54
55/**
56 * ttm_resource_manager_init
57 *
58 * @man: memory manager object to init
59 * @p_size: size managed area in pages.
60 *
61 * Initialise core parts of a manager object.
62 */
63void ttm_resource_manager_init(struct ttm_resource_manager *man,
64			       unsigned long p_size)
65{
66	unsigned i;
67
68	spin_lock_init(&man->move_lock);
69	man->size = p_size;
70
71	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
72		INIT_LIST_HEAD(&man->lru[i]);
73	man->move = NULL;
74}
75EXPORT_SYMBOL(ttm_resource_manager_init);
76
77/*
78 * ttm_resource_manager_force_list_clean
79 *
80 * @bdev - device to use
81 * @man - manager to use
82 *
83 * Force all the objects out of a memory manager until clean.
84 * Part of memory manager cleanup sequence.
85 */
86int ttm_resource_manager_force_list_clean(struct ttm_bo_device *bdev,
87					  struct ttm_resource_manager *man)
88{
89	struct ttm_operation_ctx ctx = {
90		.interruptible = false,
91		.no_wait_gpu = false,
92		.flags = TTM_OPT_FLAG_FORCE_ALLOC
93	};
94	struct ttm_bo_global *glob = &ttm_bo_glob;
95	struct dma_fence *fence;
96	int ret;
97	unsigned i;
98
99	/*
100	 * Can't use standard list traversal since we're unlocking.
101	 */
102
103	spin_lock(&glob->lru_lock);
104	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
105		while (!list_empty(&man->lru[i])) {
106			spin_unlock(&glob->lru_lock);
107			ret = ttm_mem_evict_first(bdev, man, NULL, &ctx,
108						  NULL);
109			if (ret)
110				return ret;
111			spin_lock(&glob->lru_lock);
112		}
113	}
114	spin_unlock(&glob->lru_lock);
115
116	spin_lock(&man->move_lock);
117	fence = dma_fence_get(man->move);
118	spin_unlock(&man->move_lock);
119
120	if (fence) {
121		ret = dma_fence_wait(fence, false);
122		dma_fence_put(fence);
123		if (ret)
124			return ret;
125	}
126
127	return 0;
128}
129EXPORT_SYMBOL(ttm_resource_manager_force_list_clean);
130
131/**
132 * ttm_resource_manager_debug
133 *
134 * @man: manager type to dump.
135 * @p: printer to use for debug.
136 */
137void ttm_resource_manager_debug(struct ttm_resource_manager *man,
138				struct drm_printer *p)
139{
140	drm_printf(p, "  use_type: %d\n", man->use_type);
141	drm_printf(p, "  use_tt: %d\n", man->use_tt);
142	drm_printf(p, "  size: %llu\n", man->size);
143	if (man->func && man->func->debug)
144		(*man->func->debug)(man, p);
145}
146EXPORT_SYMBOL(ttm_resource_manager_debug);
147