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70 lines
1.9 KiB
C
70 lines
1.9 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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#include <linux/libnvdimm.h>
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#include <linux/export.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include "nd-core.h"
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static DEFINE_IDA(nd_ida);
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static void nvdimm_bus_release(struct device *dev)
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{
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struct nvdimm_bus *nvdimm_bus;
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nvdimm_bus = container_of(dev, struct nvdimm_bus, dev);
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ida_simple_remove(&nd_ida, nvdimm_bus->id);
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kfree(nvdimm_bus);
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}
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struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
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struct nvdimm_bus_descriptor *nd_desc)
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{
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struct nvdimm_bus *nvdimm_bus;
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int rc;
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nvdimm_bus = kzalloc(sizeof(*nvdimm_bus), GFP_KERNEL);
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if (!nvdimm_bus)
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return NULL;
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nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL);
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if (nvdimm_bus->id < 0) {
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kfree(nvdimm_bus);
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return NULL;
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}
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nvdimm_bus->nd_desc = nd_desc;
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nvdimm_bus->dev.parent = parent;
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nvdimm_bus->dev.release = nvdimm_bus_release;
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dev_set_name(&nvdimm_bus->dev, "ndbus%d", nvdimm_bus->id);
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rc = device_register(&nvdimm_bus->dev);
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if (rc) {
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dev_dbg(&nvdimm_bus->dev, "registration failed: %d\n", rc);
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put_device(&nvdimm_bus->dev);
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return NULL;
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}
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return nvdimm_bus;
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}
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EXPORT_SYMBOL_GPL(nvdimm_bus_register);
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void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus)
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{
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if (!nvdimm_bus)
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return;
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device_unregister(&nvdimm_bus->dev);
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}
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EXPORT_SYMBOL_GPL(nvdimm_bus_unregister);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Intel Corporation");
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