1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (c) 2014-2016, Intel Corporation.
 4 */
 5#include "test/nfit_test.h"
 6#include <linux/blkdev.h>
 
 7#include <pmem.h>
 8#include <nd.h>
 9
10long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
11		long nr_pages, void **kaddr, pfn_t *pfn)
 
12{
13	resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset;
14
15	if (unlikely(is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512,
16					PFN_PHYS(nr_pages))))
17		return -EIO;
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
26		if (kaddr)
27			*kaddr = pmem->virt_addr + offset;
28		page = vmalloc_to_page(pmem->virt_addr + offset);
29		if (pfn)
30			*pfn = page_to_pfn_t(page);
31		pr_debug_ratelimited("%s: pmem: %p pgoff: %#lx pfn: %#lx\n",
32				__func__, pmem, pgoff, page_to_pfn(page));
33
34		return 1;
35	}
36
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);
41
42	/*
43	 * If badblocks are present, limit known good range to the
44	 * requested range.
45	 */
46	if (unlikely(pmem->bb.count))
47		return nr_pages;
48	return PHYS_PFN(pmem->size - pmem->pfn_pad - offset);
49}

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (c) 2014-2016, Intel Corporation.
 4 */
 5#include "test/nfit_test.h"
 6#include <linux/blkdev.h>
 7#include <linux/dax.h>
 8#include <pmem.h>
 9#include <nd.h>
10
11long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
12		long nr_pages, enum dax_access_mode mode, void **kaddr,
13		pfn_t *pfn)
14{
15	resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset;
16
17	if (unlikely(is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512,
18					PFN_PHYS(nr_pages))))
19		return -EIO;
20
21	/*
22	 * Limit dax to a single page at a time given vmalloc()-backed
23	 * in the nfit_test case.
24	 */
25	if (get_nfit_res(pmem->phys_addr + offset)) {
26		struct page *page;
27
28		if (kaddr)
29			*kaddr = pmem->virt_addr + offset;
30		page = vmalloc_to_page(pmem->virt_addr + offset);
31		if (pfn)
32			*pfn = page_to_pfn_t(page);
33		pr_debug_ratelimited("%s: pmem: %p pgoff: %#lx pfn: %#lx\n",
34				__func__, pmem, pgoff, page_to_pfn(page));
35
36		return 1;
37	}
38
39	if (kaddr)
40		*kaddr = pmem->virt_addr + offset;
41	if (pfn)
42		*pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags);
43
44	/*
45	 * If badblocks are present, limit known good range to the
46	 * requested range.
47	 */
48	if (unlikely(pmem->bb.count))
49		return nr_pages;
50	return PHYS_PFN(pmem->size - pmem->pfn_pad - offset);
51}