[deliverable/linux.git] / include / linux / pstore_ram.h

/*
 * Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com>
 * Copyright (C) 2011 Kees Cook <keescook@chromium.org>
 * Copyright (C) 2011 Google, Inc.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#ifndef __LINUX_PSTORE_RAM_H__
#define __LINUX_PSTORE_RAM_H__

#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/init.h>

struct persistent_ram_buffer;
struct rs_control;

struct persistent_ram_zone {
	phys_addr_t paddr;
	size_t size;
	void *vaddr;
	struct persistent_ram_buffer *buffer;
	size_t buffer_size;

	/* ECC correction */
	char *par_buffer;
	char *par_header;
	struct rs_control *rs_decoder;
	int corrected_bytes;
	int bad_blocks;
	int ecc_block_size;
	int ecc_size;

	char *old_log;
	size_t old_log_size;
};

struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start,
							  size_t size, u32 sig,
							  int ecc_size);
void persistent_ram_free(struct persistent_ram_zone *prz);
void persistent_ram_zap(struct persistent_ram_zone *prz);

int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
	unsigned int count);

void persistent_ram_save_old(struct persistent_ram_zone *prz);
size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
void *persistent_ram_old(struct persistent_ram_zone *prz);
void persistent_ram_free_old(struct persistent_ram_zone *prz);
ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
	char *str, size_t len);

/*
 * Ramoops platform data
 * @mem_size	memory size for ramoops
 * @mem_address	physical memory address to contain ramoops
 */

struct ramoops_platform_data {
	unsigned long	mem_size;
	unsigned long	mem_address;
	unsigned long	record_size;
	unsigned long	console_size;
	unsigned long	ftrace_size;
	int		dump_oops;
	int		ecc_size;
};

#endif
Commit	Line	Data
	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_zone {
	30	phys_addr_t paddr;
	31	size_t size;
	32	void *vaddr;
	33	struct persistent_ram_buffer *buffer;
	34	size_t buffer_size;
	35
	36	/* ECC correction */
	37	char *par_buffer;
	38	char *par_header;
	39	struct rs_control *rs_decoder;
	40	int corrected_bytes;
	41	int bad_blocks;
	42	int ecc_block_size;
	43	int ecc_size;
	44
	45	char *old_log;
	46	size_t old_log_size;
	47	};
	48
	49	struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start,
	50	size_t size, u32 sig,
	51	int ecc_size);
	52	void persistent_ram_free(struct persistent_ram_zone *prz);
	53	void persistent_ram_zap(struct persistent_ram_zone *prz);
	54
	55	int persistent_ram_write(struct persistent_ram_zone prz, const void s,
	56	unsigned int count);
	57
	58	void persistent_ram_save_old(struct persistent_ram_zone *prz);
	59	size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
	60	void persistent_ram_old(struct persistent_ram_zone prz);
	61	void persistent_ram_free_old(struct persistent_ram_zone *prz);
	62	ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
	63	char *str, size_t len);
	64
	65	/*
	66	* Ramoops platform data
	67	* @mem_size memory size for ramoops
	68	* @mem_address physical memory address to contain ramoops
	69	*/
	70
	71	struct ramoops_platform_data {
	72	unsigned long mem_size;
	73	unsigned long mem_address;
	74	unsigned long record_size;
	75	unsigned long console_size;
	76	unsigned long ftrace_size;
	77	int dump_oops;
	78	int ecc_size;
	79	};
	80
	81	#endif