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 <drm/ttm/ttm_caching.h>
33
34 struct device;
35 struct seq_file;
36 struct ttm_operation_ctx;
37 struct ttm_pool;
38 struct ttm_tt;
39
40 /**
41 * struct ttm_pool_type - Pool for a certain memory type
42 *
43 * @pool: the pool we belong to, might be NULL for the global ones
44 * @order: the allocation order our pages have
45 * @caching: the caching type our pages have
46 * @shrinker_list: our place on the global shrinker list
47 * @lock: protection of the page list
48 * @pages: the list of pages in the pool
49 */
50 struct ttm_pool_type {
51 struct ttm_pool *pool;
52 unsigned int order;
53 enum ttm_caching caching;
54
55 struct list_head shrinker_list;
56
57 spinlock_t lock;
58 struct list_head 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 * @use_dma_alloc: if coherent DMA allocations should be used
67 * @use_dma32: if GFP_DMA32 should be used
68 * @caching: pools for each caching/order
69 */
70 struct ttm_pool {
71 struct device *dev;
72 int nid;
73
74 bool use_dma_alloc;
75 bool use_dma32;
76
77 struct {
78 struct ttm_pool_type orders[NR_PAGE_ORDERS];
79 } caching[TTM_NUM_CACHING_TYPES];
80 };
81
82 int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
83 struct ttm_operation_ctx *ctx);
84 void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt);
85
86 void ttm_pool_init(struct ttm_pool *pool, struct device *dev,
87 int nid, bool use_dma_alloc, bool use_dma32);
88 void ttm_pool_fini(struct ttm_pool *pool);
89
90 int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m);
91
92 int ttm_pool_mgr_init(unsigned long num_pages);
93 void ttm_pool_mgr_fini(void);
94
95 #endif
96
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.