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Anton Vorontsovcddb8752012-05-17 00:15:08 -07001/*
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
Anton Vorontsov1894a252012-05-16 05:43:08 -070017#ifndef __LINUX_PSTORE_RAM_H__
18#define __LINUX_PSTORE_RAM_H__
Kyungmin Parkc3b92ce2010-10-27 15:34:52 -070019
Anton Vorontsovcddb8752012-05-17 00:15:08 -070020#include <linux/device.h>
21#include <linux/kernel.h>
22#include <linux/list.h>
23#include <linux/types.h>
24#include <linux/init.h>
25
26struct persistent_ram_buffer;
Anton Vorontsov67a101f2012-07-17 11:37:07 -070027struct rs_control;
Anton Vorontsovcddb8752012-05-17 00:15:08 -070028
Arve Hjønnevågc31ad082012-05-22 16:33:23 -070029struct persistent_ram_ecc_info {
30 int block_size;
31 int ecc_size;
32 int symsize;
33 int poly;
34};
35
Anton Vorontsovcddb8752012-05-17 00:15:08 -070036struct persistent_ram_zone {
37 phys_addr_t paddr;
38 size_t size;
39 void *vaddr;
40 struct persistent_ram_buffer *buffer;
41 size_t buffer_size;
42
43 /* ECC correction */
Anton Vorontsovcddb8752012-05-17 00:15:08 -070044 char *par_buffer;
45 char *par_header;
46 struct rs_control *rs_decoder;
47 int corrected_bytes;
48 int bad_blocks;
Arve Hjønnevågc31ad082012-05-22 16:33:23 -070049 struct persistent_ram_ecc_info ecc_info;
Anton Vorontsovcddb8752012-05-17 00:15:08 -070050
51 char *old_log;
52 size_t old_log_size;
53};
54
Greg Kroah-Hartmanf568f6c2012-12-21 15:02:05 -080055struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
Tony Lindgren027bc8b2014-09-16 13:50:01 -070056 u32 sig, struct persistent_ram_ecc_info *ecc_info,
57 unsigned int memtype);
Anton Vorontsovcddb8752012-05-17 00:15:08 -070058void persistent_ram_free(struct persistent_ram_zone *prz);
Anton Vorontsovfce39792012-05-26 06:07:51 -070059void persistent_ram_zap(struct persistent_ram_zone *prz);
Anton Vorontsovcddb8752012-05-17 00:15:08 -070060
61int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
62 unsigned int count);
63
Anton Vorontsov201e4ac2012-05-26 06:07:49 -070064void persistent_ram_save_old(struct persistent_ram_zone *prz);
Anton Vorontsovcddb8752012-05-17 00:15:08 -070065size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
66void *persistent_ram_old(struct persistent_ram_zone *prz);
67void persistent_ram_free_old(struct persistent_ram_zone *prz);
68ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
69 char *str, size_t len);
70
Kyungmin Parkc3b92ce2010-10-27 15:34:52 -070071/*
72 * Ramoops platform data
73 * @mem_size memory size for ramoops
74 * @mem_address physical memory address to contain ramoops
75 */
76
77struct ramoops_platform_data {
78 unsigned long mem_size;
79 unsigned long mem_address;
Tony Lindgren027bc8b2014-09-16 13:50:01 -070080 unsigned int mem_type;
Sergiu Iordache3e5c4fa2011-07-26 16:08:59 -070081 unsigned long record_size;
Anton Vorontsovb5d38e92012-05-26 06:20:23 -070082 unsigned long console_size;
Anton Vorontsova694d1b2012-07-09 17:10:44 -070083 unsigned long ftrace_size;
Sergiu Iordache6b4d2a22011-07-26 16:08:58 -070084 int dump_oops;
Arve Hjønnevågc31ad082012-05-22 16:33:23 -070085 struct persistent_ram_ecc_info ecc_info;
Kyungmin Parkc3b92ce2010-10-27 15:34:52 -070086};
87
88#endif