LXR linux/tools/testing/nvdimm/dax-dev.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright (c) 2016, Intel Corporation.
   4 */
   5#include "test/nfit_test.h"
   6#include <linux/mm.h>
   7#include "../../../drivers/dax/dax-private.h"
   8
   9phys_addr_t dax_pgoff_to_phys(struct dev_dax *dev_dax, pgoff_t pgoff,
  10                unsigned long size)
  11{
  12        int i;
  13
  14        for (i = 0; i < dev_dax->nr_range; i++) {
  15                struct dev_dax_range *dax_range = &dev_dax->ranges[i];
  16                struct range *range = &dax_range->range;
  17                unsigned long long pgoff_end;
  18                phys_addr_t addr;
  19
  20                pgoff_end = dax_range->pgoff + PHYS_PFN(range_len(range)) - 1;
  21                if (pgoff < dax_range->pgoff || pgoff > pgoff_end)
  22                        continue;
  23                addr = PFN_PHYS(pgoff - dax_range->pgoff) + range->start;
  24                if (addr + size - 1 <= range->end) {
  25                        if (get_nfit_res(addr)) {
  26                                struct page *page;
  27
  28                                if (dev_dax->region->align > PAGE_SIZE)
  29                                        return -1;
  30
  31                                page = vmalloc_to_page((void *)addr);
  32                                return PFN_PHYS(page_to_pfn(page));
  33                        }
  34                        return addr;
  35                }
  36                break;
  37        }
  38        return -1;
  39}
  40