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 ttm_tt; |
36 | struct ttm_pool; |
37 | struct ttm_operation_ctx; |
38 | |
39 | /** |
40 | * struct ttm_pool_type - Pool for a certain memory type |
41 | * |
42 | * @pool: the pool we belong to, might be NULL for the global ones |
43 | * @order: the allocation order our pages have |
44 | * @caching: the caching type our pages have |
45 | * @shrinker_list: our place on the global shrinker list |
46 | * @lock: protection of the page list |
47 | * @pages: the list of pages in the pool |
48 | */ |
49 | struct ttm_pool_type { |
50 | struct ttm_pool *pool; |
51 | unsigned int order; |
52 | enum ttm_caching caching; |
53 | |
54 | struct list_head shrinker_list; |
55 | |
56 | spinlock_t lock; |
57 | struct list_head pages; |
58 | }; |
59 | |
60 | /** |
61 | * struct ttm_pool - Pool for all caching and orders |
62 | * |
63 | * @dev: the device we allocate pages for |
64 | * @nid: which numa node to use |
65 | * @use_dma_alloc: if coherent DMA allocations should be used |
66 | * @use_dma32: if GFP_DMA32 should be used |
67 | * @caching: pools for each caching/order |
68 | */ |
69 | struct ttm_pool { |
70 | struct device *dev; |
71 | int nid; |
72 | |
73 | bool use_dma_alloc; |
74 | bool use_dma32; |
75 | |
76 | struct { |
77 | struct ttm_pool_type orders[MAX_ORDER + 1]; |
78 | } caching[TTM_NUM_CACHING_TYPES]; |
79 | }; |
80 | |
81 | int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt, |
82 | struct ttm_operation_ctx *ctx); |
83 | void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt); |
84 | |
85 | void ttm_pool_init(struct ttm_pool *pool, struct device *dev, |
86 | int nid, bool use_dma_alloc, bool use_dma32); |
87 | void ttm_pool_fini(struct ttm_pool *pool); |
88 | |
89 | int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m); |
90 | |
91 | int ttm_pool_mgr_init(unsigned long num_pages); |
92 | void ttm_pool_mgr_fini(void); |
93 | |
94 | #endif |
95 | |