include/linux/pstore_ram.h

   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
  27 struct persistent_ram_buffer;
  28 struct rs_control;
  29
  30 struct persistent_ram_ecc_info {
  31         int block_size;
  32         int ecc_size;
  33         int symsize;
  34         int poly;
  35 };
  36
  37 struct 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
  56 struct 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);
  59 void persistent_ram_free(struct persistent_ram_zone *prz);
  60 void persistent_ram_zap(struct persistent_ram_zone *prz);
  61
  62 int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
  63                          unsigned int count);
  64 int persistent_ram_write_user(struct persistent_ram_zone *prz,
  65                               const void __user *s, unsigned int count);
  66
  67 void persistent_ram_save_old(struct persistent_ram_zone *prz);
  68 size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
  69 void *persistent_ram_old(struct persistent_ram_zone *prz);
  70 void persistent_ram_free_old(struct persistent_ram_zone *prz);
  71 ssize_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
  80 struct 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