LXR linux/include/linux/pstore

   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
  17#ifndef __LINUX_PSTORE_RAM_H__
  18#define __LINUX_PSTORE_RAM_H__
  19
  20#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;
  27struct rs_control;
  28
  29struct persistent_ram_ecc_info {
  30        int block_size;
  31        int ecc_size;
  32        int symsize;
  33        int poly;
  34};
  35
  36struct 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 */
  44        char *par_buffer;
  45        char *par_header;
  46        struct rs_control *rs_decoder;
  47        int corrected_bytes;
  48        int bad_blocks;
  49        struct persistent_ram_ecc_info ecc_info;
  50
  51        char *old_log;
  52        size_t old_log_size;
  53};
  54
  55struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
  56                        u32 sig, struct persistent_ram_ecc_info *ecc_info,
  57                        unsigned int memtype);
  58void persistent_ram_free(struct persistent_ram_zone *prz);
  59void persistent_ram_zap(struct persistent_ram_zone *prz);
  60
  61int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
  62        unsigned int count);
  63
  64void persistent_ram_save_old(struct persistent_ram_zone *prz);
  65size_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
  71/*
  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        phys_addr_t     mem_address;
  80        unsigned int    mem_type;
  81        unsigned long   record_size;
  82        unsigned long   console_size;
  83        unsigned long   ftrace_size;
  84        unsigned long   pmsg_size;
  85        int             dump_oops;
  86        struct persistent_ram_ecc_info ecc_info;
  87};
  88
  89#endif
  90