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// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/dax.h>
#include "pcache_internal.h"
#include "cache_dev.h"
#include "segment.h"
int segment_copy_to_bio(struct pcache_segment *segment,
u32 data_off, u32 data_len, struct bio *bio, u32 bio_off)
{
struct iov_iter iter;
size_t copied;
void *src;
iov_iter_bvec(&iter, ITER_DEST, &bio->bi_io_vec[bio->bi_iter.bi_idx],
bio_segments(bio), bio->bi_iter.bi_size);
iter.iov_offset = bio->bi_iter.bi_bvec_done;
if (bio_off)
iov_iter_advance(&iter, bio_off);
src = segment->data + data_off;
copied = _copy_mc_to_iter(src, data_len, &iter);
if (copied != data_len)
return -EIO;
return 0;
}
int segment_copy_from_bio(struct pcache_segment *segment,
u32 data_off, u32 data_len, struct bio *bio, u32 bio_off)
{
struct iov_iter iter;
size_t copied;
void *dst;
iov_iter_bvec(&iter, ITER_SOURCE, &bio->bi_io_vec[bio->bi_iter.bi_idx],
bio_segments(bio), bio->bi_iter.bi_size);
iter.iov_offset = bio->bi_iter.bi_bvec_done;
if (bio_off)
iov_iter_advance(&iter, bio_off);
dst = segment->data + data_off;
copied = _copy_from_iter_flushcache(dst, data_len, &iter);
if (copied != data_len)
return -EIO;
pmem_wmb();
return 0;
}
void pcache_segment_init(struct pcache_cache_dev *cache_dev, struct pcache_segment *segment,
struct pcache_segment_init_options *options)
{
segment->seg_info = options->seg_info;
segment_info_set_type(segment->seg_info, options->type);
segment->cache_dev = cache_dev;
segment->seg_id = options->seg_id;
segment->data_size = PCACHE_SEG_SIZE - options->data_off;
segment->data = CACHE_DEV_SEGMENT(cache_dev, options->seg_id) + options->data_off;
}
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