projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 2025cf9e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| f295e53b DW |
2 | /* |
| 3 | * Copyright (c) 2014-2016, Intel Corporation. | |
| f295e53b DW |
4 | */ |
| 5 | #include "test/nfit_test.h" | |
| 6 | #include <linux/blkdev.h> | |
| 7 | #include <pmem.h> | |
| 8 | #include <nd.h> | |
| 9 | ||
| c1d6e828 DW |
10 | long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, |
| 11 | long nr_pages, void **kaddr, pfn_t *pfn) | |
| f295e53b | 12 | { |
| c1d6e828 | 13 | resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset; |
| f295e53b | 14 | |
| c1d6e828 DW |
15 | if (unlikely(is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512, |
| 16 | PFN_PHYS(nr_pages)))) | |
| f295e53b | 17 | return -EIO; |
| ee8520fe DW |
18 | |
| 19 | /* | |
| 20 | * Limit dax to a single page at a time given vmalloc()-backed | |
| 21 | * in the nfit_test case. | |
| 22 | */ | |
| 23 | if (get_nfit_res(pmem->phys_addr + offset)) { | |
| 24 | struct page *page; | |
| 25 | ||
| 45df5d3d HY |
26 | if (kaddr) |
| 27 | *kaddr = pmem->virt_addr + offset; | |
| ee8520fe | 28 | page = vmalloc_to_page(pmem->virt_addr + offset); |
| 45df5d3d HY |
29 | if (pfn) |
| 30 | *pfn = page_to_pfn_t(page); | |
| c1d6e828 DW |
31 | pr_debug_ratelimited("%s: pmem: %p pgoff: %#lx pfn: %#lx\n", |
| 32 | __func__, pmem, pgoff, page_to_pfn(page)); | |
| ee8520fe | 33 | |
| c1d6e828 | 34 | return 1; |
| f295e53b DW |
35 | } |
| 36 | ||
| 45df5d3d HY |
37 | if (kaddr) |
| 38 | *kaddr = pmem->virt_addr + offset; | |
| 39 | if (pfn) | |
| 40 | *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); | |
| f295e53b DW |
41 | |
| 42 | /* | |
| 43 | * If badblocks are present, limit known good range to the | |
| 44 | * requested range. | |
| 45 | */ | |
| 46 | if (unlikely(pmem->bb.count)) | |
| c1d6e828 DW |
47 | return nr_pages; |
| 48 | return PHYS_PFN(pmem->size - pmem->pfn_pad - offset); | |
| f295e53b | 49 | } |