root/tools/testing/nvdimm/dax-dev.c

DEFINITIONS

1. dax_pgoff_to_phys

   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         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 }