// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/libnvdimm.h>
#include <linux/sched/mm.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/blkdev.h>
#include <linux/fcntl.h>
#include <linux/async.h>
#include <linux/ndctl.h>
#include <linux/sched.h>
#include <linux/cpu.h>
#include <linux/fs.h>
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/nd.h>
#include "nd-core.h"
#include "nd.h"
#include "pfn.h"
int nvdimm_major;
static int nvdimm_bus_major;
static DEFINE_IDA(nd_ida);
static const struct class nd_class = {
.name = "nd",
};
static int to_nd_device_type(const struct device *dev)
{
if (is_nvdimm(dev))
return ND_DEVICE_DIMM;
else if (is_memory(dev))
return ND_DEVICE_REGION_PMEM;
else if (is_nd_dax(dev))
return ND_DEVICE_DAX_PMEM;
else if (is_nd_region(dev->parent))
return nd_region_to_nstype(to_nd_region(dev->parent));
return 0;
}
static int nvdimm_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
return add_uevent_var(env, "MODALIAS=" ND_DEVICE_MODALIAS_FMT,
to_nd_device_type(dev));
}
static struct module *to_bus_provider(struct device *dev)
{
/* pin bus providers while regions are enabled */
if (is_nd_region(dev)) {
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
return nvdimm_bus->nd_desc->module;
}
return NULL;
}
static void nvdimm_bus_probe_start(struct nvdimm_bus *nvdimm_bus)
{
guard(nvdimm_bus)(&nvdimm_bus->dev);
nvdimm_bus->probe_active++;
}
static void nvdimm_bus_probe_end(struct nvdimm_bus *nvdimm_bus)
{
guard(nvdimm_bus)(&nvdimm_bus->dev);
if (--nvdimm_bus->probe_active == 0)
