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