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 
dax_pgoff_to_phys(struct dev_dax * dev_dax,pgoff_t pgoff,unsigned long size)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 }
40