projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| efebc711 DJ |
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 | ||
| 73616367 | 17 | phys_addr_t dax_pgoff_to_phys(struct dev_dax *dev_dax, pgoff_t pgoff, |
| efebc711 DJ |
18 | unsigned long size) |
| 19 | { | |
| 20 | struct resource *res; | |
| 21 | phys_addr_t addr; | |
| 22 | int i; | |
| 23 | ||
| 73616367 DW |
24 | for (i = 0; i < dev_dax->num_resources; i++) { |
| 25 | res = &dev_dax->res[i]; | |
| efebc711 DJ |
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 | ||
| 73616367 DW |
32 | if (i < dev_dax->num_resources) { |
| 33 | res = &dev_dax->res[i]; | |
| efebc711 DJ |
34 | if (addr + size - 1 <= res->end) { |
| 35 | if (get_nfit_res(addr)) { | |
| 36 | struct page *page; | |
| 37 | ||
| 73616367 | 38 | if (dev_dax->region->align > PAGE_SIZE) |
| efebc711 DJ |
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 | } |