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        struct resource *res = &dev_dax->region->res;
  13        phys_addr_t addr;
  14
  15        addr = pgoff * PAGE_SIZE + res->start;
  16        if (addr >= res->start && addr <= res->end) {
  17                if (addr + size - 1 <= res->end) {
  18                        if (get_nfit_res(addr)) {
  19                                struct page *page;
  20
  21                                if (dev_dax->region->align > PAGE_SIZE)
  22                                        return -1;
  23
  24                                page = vmalloc_to_page((void *)addr);
  25                                return PFN_PHYS(page_to_pfn(page));
  26                        } else
  27                                return addr;
  28                }
  29        }
  30        return -1;
  31}
  32