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
   9 phys_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 }