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/device.h>
  21 #include <linux/kernel.h>
  22 #include <linux/list.h>
  23 #include <linux/types.h>
  24 #include <linux/init.h>
  25
  26 struct persistent_ram_buffer;
  27 struct rs_control;
  28
  29 struct persistent_ram_ecc_info {
  30         int block_size;
  31         int ecc_size;
  32         int symsize;
  33         int poly;
  34 };
  35
  36 struct 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
  55 struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
  56                         u32 sig, struct persistent_ram_ecc_info *ecc_info);
  57 void persistent_ram_free(struct persistent_ram_zone *prz);
  58 void persistent_ram_zap(struct persistent_ram_zone *prz);
  59
  60 int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
  61         unsigned int count);
  62
  63 void persistent_ram_save_old(struct persistent_ram_zone *prz);
  64 size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
  65 void *persistent_ram_old(struct persistent_ram_zone *prz);
  66 void persistent_ram_free_old(struct persistent_ram_zone *prz);
  67 ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
  68         char *str, size_t len);
  69
  70 /*
  71  * Ramoops platform data
  72  * @mem_size    memory size for ramoops
  73  * @mem_address physical memory address to contain ramoops
  74  */
  75
  76 struct ramoops_platform_data {
  77         unsigned long   mem_size;
  78         unsigned long   mem_address;
  79         unsigned long   record_size;
  80         unsigned long   console_size;
  81         unsigned long   ftrace_size;
  82         int             dump_oops;
  83         struct persistent_ram_ecc_info ecc_info;
  84 };
  85
  86 #endif