1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
*
* (C) COPYRIGHT 2022-2024 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU license.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
*/
#ifndef _KBASE_MEM_MIGRATE_H
#define _KBASE_MEM_MIGRATE_H
#include <linux/version_compat_defs.h>
#include <linux/types.h>
struct kbase_device;
struct file;
struct page;
/**
* DOC: Base kernel page migration implementation.
*/
#define PAGE_STATUS_MASK ((u8)0x3F)
#define PAGE_STATUS_GET(status) (status & PAGE_STATUS_MASK)
#define PAGE_STATUS_SET(status, value) ((status & ~PAGE_STATUS_MASK) | (value & PAGE_STATUS_MASK))
#define PAGE_ISOLATE_SHIFT (7)
#define PAGE_ISOLATE_MASK ((u8)1 << PAGE_ISOLATE_SHIFT)
#define PAGE_ISOLATE_SET(status, value) \
((status & ~PAGE_ISOLATE_MASK) | (value << PAGE_ISOLATE_SHIFT))
#define IS_PAGE_ISOLATED(status) ((bool)(status & PAGE_ISOLATE_MASK))
#define PAGE_MOVABLE_SHIFT (6)
#define PAGE_MOVABLE_MASK ((u8)1 << PAGE_MOVABLE_SHIFT)
#define PAGE_MOVABLE_CLEAR(status) ((status) & ~PAGE_MOVABLE_MASK)
#define PAGE_MOVABLE_SET(status) (status | PAGE_MOVABLE_MASK)
#define IS_PAGE_MOVABLE(status) ((bool)(status & PAGE_MOVABLE_MASK))
/* Global integer used to determine if module parameter value has been
* provided and if page migration feature is enabled.
*/
#if !IS_ENABLED(CONFIG_PAGE_MIGRATION_SUPPORT)
extern const int kbase_page_migration_enabled;
#else
extern int kbase_page_migration_enabled;
#endif
/**
* kbase_alloc_page_metadata - Allocate and initialize page metadata
* @kbdev: Pointer to kbase device.
* @p: Page to assign metadata to.
* @dma_addr: DMA address mapped to paged.
* @group_id: Memory group ID associated with the entity that is
* allocating the page metadata.
*
* This will allocate memory for the page's metadata, initialize it and
* assign a reference to the page's private field. Importantly, once
* the metadata is set and ready this function will mark the page as
* movable.
*
* Return: true if successful or false otherwise.
*/
bool kbase_alloc_page_metadata(struct kbase_device *kbdev, struct page *p, dma_addr_t dma_addr,
u8 group_id);
bool kbase_is_page_migration_enabled(void);
/**
* kbase_free_page_later - Defer freeing of given page.
* @kbdev: Pointer to kbase device
* @p: Page to free
*
* This will add given page to a list of pages which will be freed at
* a later time.
*/
void kbase_free_page_later(struct kbase_device *kbdev, struct page *p);
#if (KERNEL_VERSION(6, 0, 0) > LINUX_VERSION_CODE)
/*
* kbase_mem_migrate_set_address_space_ops - Set address space operations
*
* @kbdev: Pointer to object representing an instance of GPU platform device.
* @filp: Pointer to the struct file corresponding to device file
* /dev/malixx instance, passed to the file's open method.
*
* Assign address space operations to the given file struct @filp and
* add a reference to @kbdev.
*/
void kbase_mem_migrate_set_address_space_ops(struct kbase_device *kbdev, struct file *const filp);
#endif
/*
* kbase_mem_migrate_init - Initialise kbase page migration
*
* @kbdev: Pointer to kbase device
*
* Enables page migration by default based on GPU and setup work queue to
* defer freeing pages during page migration callbacks.
* This function must be called only when a kbase device is initialized.
*/
void kbase_mem_migrate_init(struct kbase_device *kbdev);
/*
* kbase_mem_migrate_term - Terminate kbase page migration
*
* @kbdev: Pointer to kbase device
*
* This will flush any work left to free pages from page migration
* and destroy workqueue associated.
*/
void kbase_mem_migrate_term(struct kbase_device *kbdev);
#endif /* _KBASE_migrate_H */
|
