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cddb8751 AV |
1 | /* |
2 | * Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com> | |
3 | * Copyright (C) 2011 Kees Cook <keescook@chromium.org> | |
4 | * Copyright (C) 2011 Google, Inc. | |
5 | * | |
6 | * This software is licensed under the terms of the GNU General Public | |
7 | * License version 2, as published by the Free Software Foundation, and | |
8 | * may be copied, distributed, and modified under those terms. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | */ | |
16 | ||
1894a253 AV |
17 | #ifndef __LINUX_PSTORE_RAM_H__ |
18 | #define __LINUX_PSTORE_RAM_H__ | |
c3b92ce9 | 19 | |
5bf6d1b9 | 20 | #include <linux/compiler.h> |
cddb8751 | 21 | #include <linux/device.h> |
5bf6d1b9 | 22 | #include <linux/init.h> |
cddb8751 AV |
23 | #include <linux/kernel.h> |
24 | #include <linux/list.h> | |
25 | #include <linux/types.h> | |
cddb8751 | 26 | |
663deb47 JF |
27 | /* |
28 | * Choose whether access to the RAM zone requires locking or not. If a zone | |
29 | * can be written to from different CPUs like with ftrace for example, then | |
30 | * PRZ_FLAG_NO_LOCK is used. For all other cases, locking is required. | |
31 | */ | |
32 | #define PRZ_FLAG_NO_LOCK BIT(0) | |
33 | ||
cddb8751 | 34 | struct persistent_ram_buffer; |
67a101f5 | 35 | struct rs_control; |
cddb8751 | 36 | |
c31ad081 AH |
37 | struct persistent_ram_ecc_info { |
38 | int block_size; | |
39 | int ecc_size; | |
40 | int symsize; | |
41 | int poly; | |
f2531f19 | 42 | uint16_t *par; |
c31ad081 AH |
43 | }; |
44 | ||
cddb8751 AV |
45 | struct persistent_ram_zone { |
46 | phys_addr_t paddr; | |
47 | size_t size; | |
48 | void *vaddr; | |
49 | struct persistent_ram_buffer *buffer; | |
50 | size_t buffer_size; | |
663deb47 | 51 | u32 flags; |
10970449 | 52 | raw_spinlock_t buffer_lock; |
cddb8751 AV |
53 | |
54 | /* ECC correction */ | |
cddb8751 AV |
55 | char *par_buffer; |
56 | char *par_header; | |
57 | struct rs_control *rs_decoder; | |
58 | int corrected_bytes; | |
59 | int bad_blocks; | |
c31ad081 | 60 | struct persistent_ram_ecc_info ecc_info; |
cddb8751 AV |
61 | |
62 | char *old_log; | |
63 | size_t old_log_size; | |
64 | }; | |
65 | ||
f568f6ca | 66 | struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size, |
027bc8b0 | 67 | u32 sig, struct persistent_ram_ecc_info *ecc_info, |
663deb47 | 68 | unsigned int memtype, u32 flags); |
cddb8751 | 69 | void persistent_ram_free(struct persistent_ram_zone *prz); |
fce39793 | 70 | void persistent_ram_zap(struct persistent_ram_zone *prz); |
cddb8751 AV |
71 | |
72 | int persistent_ram_write(struct persistent_ram_zone *prz, const void *s, | |
5bf6d1b9 MS |
73 | unsigned int count); |
74 | int persistent_ram_write_user(struct persistent_ram_zone *prz, | |
75 | const void __user *s, unsigned int count); | |
cddb8751 | 76 | |
201e4aca | 77 | void persistent_ram_save_old(struct persistent_ram_zone *prz); |
cddb8751 AV |
78 | size_t persistent_ram_old_size(struct persistent_ram_zone *prz); |
79 | void *persistent_ram_old(struct persistent_ram_zone *prz); | |
80 | void persistent_ram_free_old(struct persistent_ram_zone *prz); | |
81 | ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz, | |
82 | char *str, size_t len); | |
83 | ||
c3b92ce9 KP |
84 | /* |
85 | * Ramoops platform data | |
86 | * @mem_size memory size for ramoops | |
87 | * @mem_address physical memory address to contain ramoops | |
88 | */ | |
89 | ||
a1cf53ac JF |
90 | #define RAMOOPS_FLAG_FTRACE_PER_CPU BIT(0) |
91 | ||
c3b92ce9 KP |
92 | struct ramoops_platform_data { |
93 | unsigned long mem_size; | |
764fd639 | 94 | phys_addr_t mem_address; |
027bc8b0 | 95 | unsigned int mem_type; |
3e5c4fad | 96 | unsigned long record_size; |
b5d38e9b | 97 | unsigned long console_size; |
a694d1b5 | 98 | unsigned long ftrace_size; |
9d5438f4 | 99 | unsigned long pmsg_size; |
6b4d2a27 | 100 | int dump_oops; |
a1cf53ac | 101 | u32 flags; |
c31ad081 | 102 | struct persistent_ram_ecc_info ecc_info; |
c3b92ce9 KP |
103 | }; |
104 | ||
105 | #endif |