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2025cf9e19
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope 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 263 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2014-2016, Intel Corporation.
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*/
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#include "test/nfit_test.h"
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#include <linux/blkdev.h>
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#include <pmem.h>
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#include <nd.h>
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long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
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long nr_pages, void **kaddr, pfn_t *pfn)
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{
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resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset;
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if (unlikely(is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512,
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PFN_PHYS(nr_pages))))
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return -EIO;
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/*
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* Limit dax to a single page at a time given vmalloc()-backed
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* in the nfit_test case.
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*/
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if (get_nfit_res(pmem->phys_addr + offset)) {
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struct page *page;
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if (kaddr)
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*kaddr = pmem->virt_addr + offset;
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page = vmalloc_to_page(pmem->virt_addr + offset);
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if (pfn)
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*pfn = page_to_pfn_t(page);
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pr_debug_ratelimited("%s: pmem: %p pgoff: %#lx pfn: %#lx\n",
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__func__, pmem, pgoff, page_to_pfn(page));
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return 1;
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}
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if (kaddr)
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*kaddr = pmem->virt_addr + offset;
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if (pfn)
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*pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags);
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/*
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* If badblocks are present, limit known good range to the
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* requested range.
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*/
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if (unlikely(pmem->bb.count))
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return nr_pages;
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return PHYS_PFN(pmem->size - pmem->pfn_pad - offset);
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}
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