1f295e53bSDan Williams /* 2f295e53bSDan Williams * Copyright (c) 2014-2016, Intel Corporation. 3f295e53bSDan Williams * 4f295e53bSDan Williams * This program is free software; you can redistribute it and/or modify it 5f295e53bSDan Williams * under the terms and conditions of the GNU General Public License, 6f295e53bSDan Williams * version 2, as published by the Free Software Foundation. 7f295e53bSDan Williams * 8f295e53bSDan Williams * This program is distributed in the hope it will be useful, but WITHOUT 9f295e53bSDan Williams * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10f295e53bSDan Williams * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11f295e53bSDan Williams * more details. 12f295e53bSDan Williams */ 13f295e53bSDan Williams #include "test/nfit_test.h" 14f295e53bSDan Williams #include <linux/blkdev.h> 15f295e53bSDan Williams #include <pmem.h> 16f295e53bSDan Williams #include <nd.h> 17f295e53bSDan Williams 18f295e53bSDan Williams long pmem_direct_access(struct block_device *bdev, sector_t sector, 19f295e53bSDan Williams void __pmem **kaddr, pfn_t *pfn, long size) 20f295e53bSDan Williams { 21f295e53bSDan Williams struct pmem_device *pmem = bdev->bd_queue->queuedata; 22f295e53bSDan Williams resource_size_t offset = sector * 512 + pmem->data_offset; 23f295e53bSDan Williams 24f295e53bSDan Williams if (unlikely(is_bad_pmem(&pmem->bb, sector, size))) 25f295e53bSDan Williams return -EIO; 26ee8520feSDan Williams 27ee8520feSDan Williams /* 28ee8520feSDan Williams * Limit dax to a single page at a time given vmalloc()-backed 29ee8520feSDan Williams * in the nfit_test case. 30ee8520feSDan Williams */ 31ee8520feSDan Williams if (get_nfit_res(pmem->phys_addr + offset)) { 32ee8520feSDan Williams struct page *page; 33ee8520feSDan Williams 34ee8520feSDan Williams *kaddr = pmem->virt_addr + offset; 35ee8520feSDan Williams page = vmalloc_to_page(pmem->virt_addr + offset); 36ee8520feSDan Williams *pfn = page_to_pfn_t(page); 37ee8520feSDan Williams dev_dbg_ratelimited(disk_to_dev(bdev->bd_disk)->parent, 38ee8520feSDan Williams "%s: sector: %#llx pfn: %#lx\n", __func__, 39ee8520feSDan Williams (unsigned long long) sector, page_to_pfn(page)); 40ee8520feSDan Williams 41ee8520feSDan Williams return PAGE_SIZE; 42ee8520feSDan Williams } 43ee8520feSDan Williams 44f295e53bSDan Williams *kaddr = pmem->virt_addr + offset; 45f295e53bSDan Williams *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); 46f295e53bSDan Williams 47f295e53bSDan Williams /* 48f295e53bSDan Williams * If badblocks are present, limit known good range to the 49f295e53bSDan Williams * requested range. 50f295e53bSDan Williams */ 51f295e53bSDan Williams if (unlikely(pmem->bb.count)) 52f295e53bSDan Williams return size; 53f295e53bSDan Williams return pmem->size - pmem->pfn_pad - offset; 54f295e53bSDan Williams } 55