1/*
 2 * Copyright (c) 2016, Intel Corporation.
 3 *
 4 * This program is free software; you can redistribute it and/or modify it
 5 * under the terms and conditions of the GNU General Public License,
 6 * version 2, as published by the Free Software Foundation.
 7 *
 8 * This program is distributed in the hope it will be useful, but WITHOUT
 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
11 * more details.
12 */
13#include "test/nfit_test.h"
14#include <linux/mm.h>
15#include "../../../drivers/dax/dax-private.h"
16
17phys_addr_t dax_pgoff_to_phys(struct dev_dax *dev_dax, pgoff_t pgoff,
18		unsigned long size)
19{
20	struct resource *res;
21	phys_addr_t addr;
22	int i;
23
24	for (i = 0; i < dev_dax->num_resources; i++) {
25		res = &dev_dax->res[i];
26		addr = pgoff * PAGE_SIZE + res->start;
27		if (addr >= res->start && addr <= res->end)
28			break;
29		pgoff -= PHYS_PFN(resource_size(res));
30	}
31
32	if (i < dev_dax->num_resources) {
33		res = &dev_dax->res[i];
34		if (addr + size - 1 <= res->end) {
35			if (get_nfit_res(addr)) {
36				struct page *page;
37
38				if (dev_dax->region->align > PAGE_SIZE)
39					return -1;
40
41				page = vmalloc_to_page((void *)addr);
42				return PFN_PHYS(page_to_pfn(page));
43			} else
44				return addr;
45		}
46	}
47
48	return -1;
49}