linux-imx

/*

 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.

 *

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

 * it under the terms of version 2 of the GNU General Public License as

 * published by the Free Software Foundation.

 *

 * 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.

 */

#include <linux/blkdev.h>

#include <linux/device.h>

#include <linux/genhd.h>

#include <linux/sizes.h>

#include <linux/slab.h>

#include <linux/fs.h>

#include <linux/mm.h>

#include "nd-core.h"

#include "btt.h"

#include "nd.h"

​

static void nd_btt_release(struct device *dev)

{

    struct nd_region *nd_region = to_nd_region(dev->parent);

    struct nd_btt *nd_btt = to_nd_btt(dev);

​

    dev_dbg(dev, "trace\n");

    nd_detach_ndns(&nd_btt->dev, &nd_btt->ndns);

    ida_simple_remove(&nd_region->btt_ida, nd_btt->id);

    kfree(nd_btt->uuid);

    kfree(nd_btt);

}

​

static struct device_type nd_btt_device_type = {

    .name = "nd_btt",

    .release = nd_btt_release,

};

​

bool is_nd_btt(struct device *dev)

{

    return dev->type == &nd_btt_device_type;

}

EXPORT_SYMBOL(is_nd_btt);

​

struct nd_btt *to_nd_btt(struct device *dev)

{

    struct nd_btt *nd_btt = container_of(dev, struct nd_btt, dev);

​

    WARN_ON(!is_nd_btt(dev));

    return nd_btt;

}

EXPORT_SYMBOL(to_nd_btt);

​

static const unsigned long btt_lbasize_supported[] = { 512, 520, 528,

    4096, 4104, 4160, 4224, 0 };

​

static ssize_t sector_size_show(struct device *dev,

        struct device_attribute *attr, char *buf)

{

    struct nd_btt *nd_btt = to_nd_btt(dev);

​