2 * Copyright (c) 2014-2016, Intel Corporation.
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.
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
13 #include "test/nfit_test.h"
14 #include <linux/blkdev.h>
18 long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
19 long nr_pages, void **kaddr, pfn_t *pfn)
21 resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset;
23 if (unlikely(is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512,
28 * Limit dax to a single page at a time given vmalloc()-backed
29 * in the nfit_test case.
31 if (get_nfit_res(pmem->phys_addr + offset)) {
35 *kaddr = pmem->virt_addr + offset;
36 page = vmalloc_to_page(pmem->virt_addr + offset);
38 *pfn = page_to_pfn_t(page);
39 pr_debug_ratelimited("%s: pmem: %p pgoff: %#lx pfn: %#lx\n",
40 __func__, pmem, pgoff, page_to_pfn(page));
46 *kaddr = pmem->virt_addr + offset;
48 *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags);
51 * If badblocks are present, limit known good range to the
54 if (unlikely(pmem->bb.count))
56 return PHYS_PFN(pmem->size - pmem->pfn_pad - offset);