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Diffstat (limited to '')
-rw-r--r-- | tools/testing/nvdimm/pmem-dax.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/tools/testing/nvdimm/pmem-dax.c b/tools/testing/nvdimm/pmem-dax.c new file mode 100644 index 000000000000..fdba77f2bb06 --- /dev/null +++ b/tools/testing/nvdimm/pmem-dax.c @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2014-2016, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ +#include "test/nfit_test.h" +#include <linux/blkdev.h> +#include <pmem.h> +#include <nd.h> + +long pmem_direct_access(struct block_device *bdev, sector_t sector, + void __pmem **kaddr, pfn_t *pfn, long size) +{ + struct pmem_device *pmem = bdev->bd_queue->queuedata; + resource_size_t offset = sector * 512 + pmem->data_offset; + + /* disable DAX for nfit_test pmem devices */ + if (get_nfit_res(pmem->phys_addr + offset)) { + dev_info_once(pmem->bb.dev, "dax is disabled for nfit_test\n"); + return -EIO; + } + + if (unlikely(is_bad_pmem(&pmem->bb, sector, size))) + return -EIO; + *kaddr = pmem->virt_addr + offset; + *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); + + /* + * If badblocks are present, limit known good range to the + * requested range. + */ + if (unlikely(pmem->bb.count)) + return size; + return pmem->size - pmem->pfn_pad - offset; +} |