93 строки
2.2 KiB
C
93 строки
2.2 KiB
C
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/*
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* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include "nd-core.h"
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static DEFINE_IDA(dimm_ida);
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static void nvdimm_release(struct device *dev)
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{
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struct nvdimm *nvdimm = to_nvdimm(dev);
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ida_simple_remove(&dimm_ida, nvdimm->id);
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kfree(nvdimm);
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}
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static struct device_type nvdimm_device_type = {
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.name = "nvdimm",
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.release = nvdimm_release,
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};
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static bool is_nvdimm(struct device *dev)
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{
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return dev->type == &nvdimm_device_type;
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}
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struct nvdimm *to_nvdimm(struct device *dev)
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{
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struct nvdimm *nvdimm = container_of(dev, struct nvdimm, dev);
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WARN_ON(!is_nvdimm(dev));
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return nvdimm;
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}
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EXPORT_SYMBOL_GPL(to_nvdimm);
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const char *nvdimm_name(struct nvdimm *nvdimm)
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{
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return dev_name(&nvdimm->dev);
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}
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EXPORT_SYMBOL_GPL(nvdimm_name);
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void *nvdimm_provider_data(struct nvdimm *nvdimm)
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{
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return nvdimm->provider_data;
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}
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EXPORT_SYMBOL_GPL(nvdimm_provider_data);
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struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
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const struct attribute_group **groups, unsigned long flags)
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{
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struct nvdimm *nvdimm = kzalloc(sizeof(*nvdimm), GFP_KERNEL);
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struct device *dev;
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if (!nvdimm)
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return NULL;
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nvdimm->id = ida_simple_get(&dimm_ida, 0, 0, GFP_KERNEL);
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if (nvdimm->id < 0) {
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kfree(nvdimm);
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return NULL;
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}
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nvdimm->provider_data = provider_data;
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nvdimm->flags = flags;
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dev = &nvdimm->dev;
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dev_set_name(dev, "nmem%d", nvdimm->id);
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dev->parent = &nvdimm_bus->dev;
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dev->type = &nvdimm_device_type;
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dev->bus = &nvdimm_bus_type;
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dev->groups = groups;
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if (device_register(dev) != 0) {
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put_device(dev);
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return NULL;
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}
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return nvdimm;
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}
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EXPORT_SYMBOL_GPL(nvdimm_create);
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