[GitHub/mt8127/android_kernel_alcatel_ttab.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 persistent_ram_descriptor {
	const char	*name;
	phys_addr_t	size;
};

struct persistent_ram {
	phys_addr_t	start;
	phys_addr_t	size;

	int					num_descs;
	struct persistent_ram_descriptor	*descs;

	struct list_head node;
};

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

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

	char *old_log;
	size_t old_log_size;
};

int persistent_ram_early_init(struct persistent_ram *ram);

struct persistent_ram_zone * __init persistent_ram_new(phys_addr_t start,
						       size_t size,
						       bool ecc);
void persistent_ram_free(struct persistent_ram_zone *prz);
void persistent_ram_zap(struct persistent_ram_zone *prz);
struct persistent_ram_zone *persistent_ram_init_ringbuffer(struct device *dev,
		bool ecc);

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;
	int		dump_oops;
	bool		ecc;
};

#endif
Commit	Line	Data
cddb8751 AV	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
1894a253 AV	17	#ifndef __LINUX_PSTORE_RAM_H__
1894a253 AV	18	#define __LINUX_PSTORE_RAM_H__
c3b92ce9	19
cddb8751 AV	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
	28	struct persistent_ram_descriptor {
	29	const char *name;
	30	phys_addr_t size;
	31	};
	32
	33	struct persistent_ram {
	34	phys_addr_t start;
	35	phys_addr_t size;
	36
	37	int num_descs;
	38	struct persistent_ram_descriptor *descs;
	39
	40	struct list_head node;
	41	};
	42
	43	struct persistent_ram_zone {
	44	phys_addr_t paddr;
	45	size_t size;
	46	void *vaddr;
	47	struct persistent_ram_buffer *buffer;
	48	size_t buffer_size;
	49
	50	/* ECC correction */
	51	bool ecc;
	52	char *par_buffer;
	53	char *par_header;
	54	struct rs_control *rs_decoder;
	55	int corrected_bytes;
	56	int bad_blocks;
	57	int ecc_block_size;
	58	int ecc_size;
	59	int ecc_symsize;
	60	int ecc_poly;
	61
	62	char *old_log;
	63	size_t old_log_size;
	64	};
	65
	66	int persistent_ram_early_init(struct persistent_ram *ram);
	67
	68	struct persistent_ram_zone * __init persistent_ram_new(phys_addr_t start,
	69	size_t size,
	70	bool ecc);
	71	void persistent_ram_free(struct persistent_ram_zone *prz);
fce39793	72	void persistent_ram_zap(struct persistent_ram_zone *prz);
cddb8751 AV	73	struct persistent_ram_zone persistent_ram_init_ringbuffer(struct device dev,
	74	bool ecc);
	75
	76	int persistent_ram_write(struct persistent_ram_zone prz, const void s,
	77	unsigned int count);
	78
201e4aca	79	void persistent_ram_save_old(struct persistent_ram_zone *prz);
cddb8751 AV	80	size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
	81	void persistent_ram_old(struct persistent_ram_zone prz);
	82	void persistent_ram_free_old(struct persistent_ram_zone *prz);
	83	ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
	84	char *str, size_t len);
	85
c3b92ce9 KP	86	/*
	87	* Ramoops platform data
	88	* @mem_size memory size for ramoops
	89	* @mem_address physical memory address to contain ramoops
	90	*/
	91
	92	struct ramoops_platform_data {
	93	unsigned long mem_size;
	94	unsigned long mem_address;
3e5c4fad	95	unsigned long record_size;
6b4d2a27	96	int dump_oops;
39eb7e97	97	bool ecc;
c3b92ce9 KP	98	};
	99
	100	#endif