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/compiler.h>
  21#include <linux/device.h>
  22#include <linux/init.h>
  23#include <linux/kernel.h>
  24#include <linux/list.h>
  25#include <linux/types.h>
  26
  27struct persistent_ram_buffer;
  28struct rs_control;
  29
  30struct persistent_ram_ecc_info {
  31        int block_size;
  32        int ecc_size;
  33        int symsize;
  34        int poly;
  35};
  36
  37struct persistent_ram_zone {
  38        phys_addr_t paddr;
  39        size_t size;
  40        void *vaddr;
  41        struct persistent_ram_buffer *buffer;
  42        size_t buffer_size;
  43
  44        /* ECC correction */
  45        char *par_buffer;
  46        char *par_header;
  47        struct rs_control *rs_decoder;
  48        int corrected_bytes;
  49        int bad_blocks;
  50        struct persistent_ram_ecc_info ecc_info;
  51
  52        char *old_log;
  53        size_t old_log_size;
  54};
  55
  56struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
  57                        u32 sig, struct persistent_ram_ecc_info *ecc_info,
  58                        unsigned int memtype);
  59void persistent_ram_free(struct persistent_ram_zone *prz);
  60void persistent_ram_zap(struct persistent_ram_zone *prz);
  61
  62int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
  63                         unsigned int count);
  64int persistent_ram_write_user(struct persistent_ram_zone *prz,
  65                              const void __user *s, unsigned int count);
  66
  67void persistent_ram_save_old(struct persistent_ram_zone *prz);
  68size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
  69void *persistent_ram_old(struct persistent_ram_zone *prz);
  70void persistent_ram_free_old(struct persistent_ram_zone *prz);
  71ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
  72        char *str, size_t len);
  73
  74/*
  75 * Ramoops platform data
  76 * @mem_size    memory size for ramoops
  77 * @mem_address physical memory address to contain ramoops
  78 */
  79
  80struct ramoops_platform_data {
  81        unsigned long   mem_size;
  82        phys_addr_t     mem_address;
  83        unsigned int    mem_type;
  84        unsigned long   record_size;
  85        unsigned long   console_size;
  86        unsigned long   ftrace_size;
  87        unsigned long   pmsg_size;
  88        int             dump_oops;
  89        struct persistent_ram_ecc_info ecc_info;
  90};
  91
  92#endif
  93