mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 03:14:42 +07:00
7a9eb20666
The __pmem address space was meant to annotate codepaths that touch persistent memory and need to coordinate a call to wmb_pmem(). Now that wmb_pmem() is gone, there is little need to keep this annotation. Cc: Christoph Hellwig <hch@lst.de> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
|
|
* 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 **kaddr, pfn_t *pfn, long size)
|
|
{
|
|
struct pmem_device *pmem = bdev->bd_queue->queuedata;
|
|
resource_size_t offset = sector * 512 + pmem->data_offset;
|
|
|
|
if (unlikely(is_bad_pmem(&pmem->bb, sector, size)))
|
|
return -EIO;
|
|
|
|
/*
|
|
* Limit dax to a single page at a time given vmalloc()-backed
|
|
* in the nfit_test case.
|
|
*/
|
|
if (get_nfit_res(pmem->phys_addr + offset)) {
|
|
struct page *page;
|
|
|
|
*kaddr = pmem->virt_addr + offset;
|
|
page = vmalloc_to_page(pmem->virt_addr + offset);
|
|
*pfn = page_to_pfn_t(page);
|
|
dev_dbg_ratelimited(disk_to_dev(bdev->bd_disk)->parent,
|
|
"%s: sector: %#llx pfn: %#lx\n", __func__,
|
|
(unsigned long long) sector, page_to_pfn(page));
|
|
|
|
return PAGE_SIZE;
|
|
}
|
|
|
|
*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;
|
|
}
|