linux-imx

/*

 * Copyright(c) 2013-2016 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/device.h>

#include <linux/sizes.h>

#include <linux/slab.h>

#include <linux/mm.h>

#include "nd-core.h"

#include "pfn.h"

#include "nd.h"

​

static void nd_dax_release(struct device *dev)

{

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

    struct nd_dax *nd_dax = to_nd_dax(dev);

    struct nd_pfn *nd_pfn = &nd_dax->nd_pfn;

​

    dev_dbg(dev, "trace\n");

    nd_detach_ndns(dev, &nd_pfn->ndns);

    ida_simple_remove(&nd_region->dax_ida, nd_pfn->id);

    kfree(nd_pfn->uuid);

    kfree(nd_dax);

}

​

static struct device_type nd_dax_device_type = {

    .name = "nd_dax",

    .release = nd_dax_release,

};

​

bool is_nd_dax(struct device *dev)

{

    return dev ? dev->type == &nd_dax_device_type : false;

}

EXPORT_SYMBOL(is_nd_dax);

​

struct nd_dax *to_nd_dax(struct device *dev)

{

    struct nd_dax *nd_dax = container_of(dev, struct nd_dax, nd_pfn.dev);

​

    WARN_ON(!is_nd_dax(dev));

    return nd_dax;

}

EXPORT_SYMBOL(to_nd_dax);

​

static const struct attribute_group *nd_dax_attribute_groups[] = {

    &nd_pfn_attribute_group,

    &nd_device_attribute_group,

    &nd_numa_attribute_group,

    NULL,

};

​

static struct nd_dax *nd_dax_alloc(struct nd_region *nd_region)

{

    struct nd_pfn *nd_pfn;