Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 OR MIT */
2/*
3 * Copyright 2020 Advanced Micro Devices, Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors: Christian König
24 */
25
26#ifndef _TTM_PAGE_POOL_H_
27#define _TTM_PAGE_POOL_H_
28
29#include <linux/mmzone.h>
30#include <linux/llist.h>
31#include <linux/spinlock.h>
32#include <linux/list_lru.h>
33#include <drm/ttm/ttm_caching.h>
34
35struct device;
36struct seq_file;
37struct ttm_backup_flags;
38struct ttm_operation_ctx;
39struct ttm_pool;
40struct ttm_tt;
41
42/**
43 * struct ttm_pool_type - Pool for a certain memory type
44 *
45 * @pool: the pool we belong to, might be NULL for the global ones
46 * @order: the allocation order our pages have
47 * @caching: the caching type our pages have
48 * @shrinker_list: our place on the global shrinker list
49 * @pages: the lru_list of pages in the pool
50 */
51struct ttm_pool_type {
52 struct ttm_pool *pool;
53 unsigned int order;
54 enum ttm_caching caching;
55
56 struct list_head shrinker_list;
57
58 struct list_lru pages;
59};
60
61/**
62 * struct ttm_pool - Pool for all caching and orders
63 *
64 * @dev: the device we allocate pages for
65 * @nid: which numa node to use
66 * @alloc_flags: TTM_ALLOCATION_POOL_* flags
67 * @caching: pools for each caching/order
68 */
69struct ttm_pool {
70 struct device *dev;
71 int nid;
72
73 unsigned int alloc_flags;
74
75 struct {
76 struct ttm_pool_type orders[NR_PAGE_ORDERS];
77 } caching[TTM_NUM_CACHING_TYPES];
78};
79
80int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
81 struct ttm_operation_ctx *ctx);
82void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt);
83
84void ttm_pool_init(struct ttm_pool *pool, struct device *dev,
85 int nid, unsigned int alloc_flags);
86void ttm_pool_fini(struct ttm_pool *pool);
87
88int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m);
89
90void ttm_pool_drop_backed_up(struct ttm_tt *tt);
91
92long ttm_pool_backup(struct ttm_pool *pool, struct ttm_tt *ttm,
93 const struct ttm_backup_flags *flags);
94int ttm_pool_restore_and_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
95 const struct ttm_operation_ctx *ctx);
96
97int ttm_pool_mgr_init(unsigned long num_pages);
98void ttm_pool_mgr_fini(void);
99
100#endif