linux-imx

/*

 * Copyright © 2016 Intel Corporation

 *

 * Authors:

 *    Scott  Bauer      <scott.bauer@intel.com>

 *    Rafael Antognolli <rafael.antognolli@intel.com>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope 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.

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ":OPAL: " fmt

​

#include <linux/delay.h>

#include <linux/device.h>

#include <linux/kernel.h>

#include <linux/list.h>

#include <linux/genhd.h>

#include <linux/slab.h>

#include <linux/uaccess.h>

#include <uapi/linux/sed-opal.h>

#include <linux/sed-opal.h>

#include <linux/string.h>

#include <linux/kdev_t.h>

​

#include "opal_proto.h"

​

#define IO_BUFFER_LENGTH 2048

#define MAX_TOKS 64

​

struct opal_step {

    int (*fn)(struct opal_dev *dev, void *data);

    void *data;

};

typedef int (cont_fn)(struct opal_dev *dev);

​

enum opal_atom_width {

    OPAL_WIDTH_TINY,

    OPAL_WIDTH_SHORT,

    OPAL_WIDTH_MEDIUM,

    OPAL_WIDTH_LONG,

    OPAL_WIDTH_TOKEN

};

​

/*

 * On the parsed response, we don't store again the toks that are already

 * stored in the response buffer. Instead, for each token, we just store a

 * pointer to the position in the buffer where the token starts, and the size

 * of the token in bytes.

 */

struct opal_resp_tok {

    const u8 *pos;

    size_t len;

    enum opal_response_token type;

    enum opal_atom_width width;

    union {

        u64 u;