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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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efebc71118
Provide a replacement pgoff_to_phys() that translates an nfit_test resource (allocated by vmalloc()) to a pfn. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/*
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* Copyright (c) 2016, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include "test/nfit_test.h"
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#include <linux/mm.h>
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#include "../../../drivers/dax/dax-private.h"
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phys_addr_t dax_pgoff_to_phys(struct dax_dev *dax_dev, pgoff_t pgoff,
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unsigned long size)
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{
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struct resource *res;
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phys_addr_t addr;
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int i;
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for (i = 0; i < dax_dev->num_resources; i++) {
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res = &dax_dev->res[i];
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addr = pgoff * PAGE_SIZE + res->start;
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if (addr >= res->start && addr <= res->end)
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break;
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pgoff -= PHYS_PFN(resource_size(res));
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}
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if (i < dax_dev->num_resources) {
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res = &dax_dev->res[i];
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if (addr + size - 1 <= res->end) {
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if (get_nfit_res(addr)) {
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struct page *page;
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if (dax_dev->region->align > PAGE_SIZE)
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return -1;
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page = vmalloc_to_page((void *)addr);
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return PFN_PHYS(page_to_pfn(page));
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} else
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return addr;
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}
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}
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return -1;
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}
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