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 17 phys_addr_t dax_pgoff_to_phys(struct dev_dax *dev_dax, pgoff_t pgoff, 18 unsigned long size) 19 { 20 struct resource *res = &dev_dax->region->res; 21 phys_addr_t addr; 22 23 addr = pgoff * PAGE_SIZE + res->start; 24 if (addr >= res->start && addr <= res->end) { 25 if (addr + size - 1 <= res->end) { 26 if (get_nfit_res(addr)) { 27 struct page *page; 28 29 if (dev_dax->region->align > PAGE_SIZE) 30 return -1; 31 32 page = vmalloc_to_page((void *)addr); 33 return PFN_PHYS(page_to_pfn(page)); 34 } else 35 return addr; 36 } 37 } 38 return -1; 39 } 40