tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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}