mirror of
https://github.com/torvalds/linux
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174ebece37
In preparation for adding more parameters to instance creation, move existing parameters to a new struct. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brice Goglin <Brice.Goglin@inria.fr> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: David Airlie <airlied@linux.ie> Cc: David Hildenbrand <david@redhat.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Jia He <justin.he@arm.com> Cc: Joao Martins <joao.m.martins@oracle.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: Will Deacon <will@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Hulk Robot <hulkci@huawei.com> Cc: Jason Yan <yanaijie@huawei.com> Cc: "Jérôme Glisse" <jglisse@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: kernel test robot <lkp@intel.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: Vivek Goyal <vgoyal@redhat.com> Link: https://lkml.kernel.org/r/159643099411.4062302.1337305960720423895.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */
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#include <linux/memremap.h>
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#include <linux/module.h>
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#include <linux/pfn_t.h>
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#include "../../nvdimm/pfn.h"
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#include "../../nvdimm/nd.h"
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#include "../bus.h"
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struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys)
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{
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struct resource res;
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int rc, id, region_id;
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resource_size_t offset;
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struct nd_pfn_sb *pfn_sb;
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struct dev_dax *dev_dax;
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struct dev_dax_data data;
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struct nd_namespace_io *nsio;
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struct dax_region *dax_region;
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struct dev_pagemap pgmap = { };
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struct nd_namespace_common *ndns;
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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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struct nd_region *nd_region = to_nd_region(dev->parent);
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ndns = nvdimm_namespace_common_probe(dev);
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if (IS_ERR(ndns))
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return ERR_CAST(ndns);
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/* parse the 'pfn' info block via ->rw_bytes */
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rc = devm_namespace_enable(dev, ndns, nd_info_block_reserve());
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if (rc)
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return ERR_PTR(rc);
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rc = nvdimm_setup_pfn(nd_pfn, &pgmap);
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if (rc)
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return ERR_PTR(rc);
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devm_namespace_disable(dev, ndns);
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/* reserve the metadata area, device-dax will reserve the data */
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pfn_sb = nd_pfn->pfn_sb;
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offset = le64_to_cpu(pfn_sb->dataoff);
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nsio = to_nd_namespace_io(&ndns->dev);
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if (!devm_request_mem_region(dev, nsio->res.start, offset,
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dev_name(&ndns->dev))) {
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dev_warn(dev, "could not reserve metadata\n");
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return ERR_PTR(-EBUSY);
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}
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rc = sscanf(dev_name(&ndns->dev), "namespace%d.%d", ®ion_id, &id);
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if (rc != 2)
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return ERR_PTR(-EINVAL);
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/* adjust the dax_region resource to the start of data */
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memcpy(&res, &pgmap.res, sizeof(res));
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res.start += offset;
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dax_region = alloc_dax_region(dev, region_id, &res,
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nd_region->target_node, le32_to_cpu(pfn_sb->align));
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if (!dax_region)
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return ERR_PTR(-ENOMEM);
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data = (struct dev_dax_data) {
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.dax_region = dax_region,
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.id = id,
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.pgmap = &pgmap,
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.subsys = subsys,
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};
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dev_dax = devm_create_dev_dax(&data);
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/* child dev_dax instances now own the lifetime of the dax_region */
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dax_region_put(dax_region);
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return dev_dax;
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}
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EXPORT_SYMBOL_GPL(__dax_pmem_probe);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Intel Corporation");
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