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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 64 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.894819585@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
134 lines
3 KiB
C
134 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright(c) 2013-2016 Intel Corporation. All rights reserved.
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*/
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#include <linux/device.h>
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#include <linux/sizes.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include "nd-core.h"
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#include "pfn.h"
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#include "nd.h"
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static void nd_dax_release(struct device *dev)
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{
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struct nd_region *nd_region = to_nd_region(dev->parent);
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struct nd_dax *nd_dax = to_nd_dax(dev);
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struct nd_pfn *nd_pfn = &nd_dax->nd_pfn;
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dev_dbg(dev, "trace\n");
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nd_detach_ndns(dev, &nd_pfn->ndns);
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ida_simple_remove(&nd_region->dax_ida, nd_pfn->id);
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kfree(nd_pfn->uuid);
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kfree(nd_dax);
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}
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static struct device_type nd_dax_device_type = {
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.name = "nd_dax",
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.release = nd_dax_release,
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};
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bool is_nd_dax(struct device *dev)
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{
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return dev ? dev->type == &nd_dax_device_type : false;
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}
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EXPORT_SYMBOL(is_nd_dax);
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struct nd_dax *to_nd_dax(struct device *dev)
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{
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struct nd_dax *nd_dax = container_of(dev, struct nd_dax, nd_pfn.dev);
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WARN_ON(!is_nd_dax(dev));
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return nd_dax;
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}
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EXPORT_SYMBOL(to_nd_dax);
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static const struct attribute_group *nd_dax_attribute_groups[] = {
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&nd_pfn_attribute_group,
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&nd_device_attribute_group,
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&nd_numa_attribute_group,
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NULL,
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};
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static struct nd_dax *nd_dax_alloc(struct nd_region *nd_region)
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{
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struct nd_pfn *nd_pfn;
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struct nd_dax *nd_dax;
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struct device *dev;
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nd_dax = kzalloc(sizeof(*nd_dax), GFP_KERNEL);
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if (!nd_dax)
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return NULL;
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nd_pfn = &nd_dax->nd_pfn;
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nd_pfn->id = ida_simple_get(&nd_region->dax_ida, 0, 0, GFP_KERNEL);
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if (nd_pfn->id < 0) {
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kfree(nd_dax);
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return NULL;
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}
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dev = &nd_pfn->dev;
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dev_set_name(dev, "dax%d.%d", nd_region->id, nd_pfn->id);
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dev->groups = nd_dax_attribute_groups;
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dev->type = &nd_dax_device_type;
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dev->parent = &nd_region->dev;
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return nd_dax;
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}
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struct device *nd_dax_create(struct nd_region *nd_region)
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{
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struct device *dev = NULL;
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struct nd_dax *nd_dax;
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if (!is_memory(&nd_region->dev))
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return NULL;
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nd_dax = nd_dax_alloc(nd_region);
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if (nd_dax)
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dev = nd_pfn_devinit(&nd_dax->nd_pfn, NULL);
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__nd_device_register(dev);
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return dev;
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}
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int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns)
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{
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int rc;
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struct nd_dax *nd_dax;
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struct device *dax_dev;
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struct nd_pfn *nd_pfn;
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struct nd_pfn_sb *pfn_sb;
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struct nd_region *nd_region = to_nd_region(ndns->dev.parent);
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if (ndns->force_raw)
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return -ENODEV;
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switch (ndns->claim_class) {
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case NVDIMM_CCLASS_NONE:
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case NVDIMM_CCLASS_DAX:
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break;
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default:
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return -ENODEV;
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}
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nvdimm_bus_lock(&ndns->dev);
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nd_dax = nd_dax_alloc(nd_region);
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nd_pfn = &nd_dax->nd_pfn;
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dax_dev = nd_pfn_devinit(nd_pfn, ndns);
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nvdimm_bus_unlock(&ndns->dev);
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if (!dax_dev)
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return -ENOMEM;
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pfn_sb = devm_kzalloc(dev, sizeof(*pfn_sb), GFP_KERNEL);
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nd_pfn->pfn_sb = pfn_sb;
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rc = nd_pfn_validate(nd_pfn, DAX_SIG);
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dev_dbg(dev, "dax: %s\n", rc == 0 ? dev_name(dax_dev) : "<none>");
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if (rc < 0) {
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nd_detach_ndns(dax_dev, &nd_pfn->ndns);
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put_device(dax_dev);
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} else
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__nd_device_register(dax_dev);
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return rc;
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}
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EXPORT_SYMBOL(nd_dax_probe);
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