Lines Matching refs:btt
19 #include "btt.h"
255 static void btt_debugfs_init(struct btt *btt)
260 btt->debugfs_dir = debugfs_create_dir(dev_name(&btt->nd_btt->dev),
262 if (IS_ERR_OR_NULL(btt->debugfs_dir))
265 list_for_each_entry(arena, &btt->arena_list, list) {
266 arena_debugfs_init(arena, btt->debugfs_dir, i);
611 * Detecting valid log indices: We read a log group (see the comments in btt.h
745 static struct arena_info *alloc_arena(struct btt *btt, size_t size,
755 arena->nd_btt = btt->nd_btt;
756 arena->sector_size = btt->sector_size;
764 arena->external_lbasize = btt->lbasize;
768 arena->version_major = btt->nd_btt->version_major;
769 arena->version_minor = btt->nd_btt->version_minor;
802 static void free_arenas(struct btt *btt)
806 list_for_each_entry_safe(arena, next, &btt->arena_list, list) {
817 * This function reads an existing valid btt superblock and
846 static int discover_arenas(struct btt *btt)
851 size_t remaining = btt->rawsize;
862 arena = alloc_arena(btt, 0, 0, 0);
873 if (!nd_btt_arena_is_valid(btt->nd_btt, super)) {
874 if (remaining == btt->rawsize) {
875 btt->init_state = INIT_NOTFOUND;
908 list_add_tail(&arena->list, &btt->arena_list);
918 btt->num_arenas = num_arenas;
919 btt->nlba = cur_nlba;
920 btt->init_state = INIT_READY;
927 free_arenas(btt);
933 static int create_arenas(struct btt *btt)
935 size_t remaining = btt->rawsize;
946 arena = alloc_arena(btt, arena_size, btt->nlba, cur_off);
948 free_arenas(btt);
951 btt->nlba += arena->external_nlba;
957 list_add_tail(&arena->list, &btt->arena_list);
1025 static int btt_meta_init(struct btt *btt)
1030 mutex_lock(&btt->init_lock);
1031 list_for_each_entry(arena, &btt->arena_list, list) {
1049 btt->init_state = INIT_READY;
1052 mutex_unlock(&btt->init_lock);
1056 static u32 btt_meta_size(struct btt *btt)
1058 return btt->lbasize - btt->sector_size;
1068 static int lba_to_arena(struct btt *btt, sector_t sector, __u32 *premap,
1072 __u64 lba = div_u64(sector << SECTOR_SHIFT, btt->sector_size);
1074 list_for_each_entry(arena_list, &btt->arena_list, list) {
1141 static int btt_rw_integrity(struct btt *btt, struct bio_integrity_payload *bip,
1144 unsigned int len = btt_meta_size(btt);
1151 meta_nsoff = to_namespace_offset(arena, postmap) + btt->sector_size;
1188 static int btt_rw_integrity(struct btt *btt, struct bio_integrity_payload *bip,
1195 static int btt_read_pg(struct btt *btt, struct bio_integrity_payload *bip,
1207 lane = nd_region_acquire_lane(btt->nd_region);
1209 ret = lba_to_arena(btt, sector, &premap, &arena);
1213 cur_len = min(btt->sector_size, len);
1271 ret = btt_rw_integrity(btt, bip, arena, postmap, READ);
1277 nd_region_release_lane(btt->nd_region, lane);
1281 sector += btt->sector_size >> SECTOR_SHIFT;
1289 nd_region_release_lane(btt->nd_region, lane);
1298 static bool btt_is_badblock(struct btt *btt, struct arena_info *arena,
1305 return is_bad_pmem(btt->phys_bb, phys_sector, arena->internal_lbasize);
1308 static int btt_write_pg(struct btt *btt, struct bio_integrity_payload *bip,
1323 lane = nd_region_acquire_lane(btt->nd_region);
1325 ret = lba_to_arena(btt, sector, &premap, &arena);
1328 cur_len = min(btt->sector_size, len);
1335 if (btt_is_badblock(btt, arena, arena->freelist[lane].block))
1340 nd_region_release_lane(btt->nd_region, lane);
1368 ret = btt_rw_integrity(btt, bip, arena, new_postmap,
1401 nd_region_release_lane(btt->nd_region, lane);
1411 sector += btt->sector_size >> SECTOR_SHIFT;
1419 nd_region_release_lane(btt->nd_region, lane);
1423 static int btt_do_bvec(struct btt *btt, struct bio_integrity_payload *bip,
1430 ret = btt_read_pg(btt, bip, page, off, sector, len);
1434 ret = btt_write_pg(btt, bip, sector, page, off, len);
1443 struct btt *btt = bio->bi_bdev->bd_disk->private_data;
1459 if (len > PAGE_SIZE || len < btt->sector_size ||
1460 len % btt->sector_size) {
1461 dev_err_ratelimited(&btt->nd_btt->dev,
1467 err = btt_do_bvec(btt, bip, bvec.bv_page, len, bvec.bv_offset,
1470 dev_err(&btt->nd_btt->dev,
1500 static int btt_blk_init(struct btt *btt)
1502 struct nd_btt *nd_btt = btt->nd_btt;
1506 btt->btt_disk = blk_alloc_disk(NUMA_NO_NODE);
1507 if (!btt->btt_disk)
1510 nvdimm_namespace_disk_name(ndns, btt->btt_disk->disk_name);
1511 btt->btt_disk->first_minor = 0;
1512 btt->btt_disk->fops = &btt_fops;
1513 btt->btt_disk->private_data = btt;
1515 blk_queue_logical_block_size(btt->btt_disk->queue, btt->sector_size);
1516 blk_queue_max_hw_sectors(btt->btt_disk->queue, UINT_MAX);
1517 blk_queue_flag_set(QUEUE_FLAG_NONROT, btt->btt_disk->queue);
1518 blk_queue_flag_set(QUEUE_FLAG_SYNCHRONOUS, btt->btt_disk->queue);
1520 if (btt_meta_size(btt)) {
1521 rc = nd_integrity_init(btt->btt_disk, btt_meta_size(btt));
1526 set_capacity(btt->btt_disk, btt->nlba * btt->sector_size >> 9);
1527 rc = device_add_disk(&btt->nd_btt->dev, btt->btt_disk, NULL);
1531 btt->nd_btt->size = btt->nlba * (u64)btt->sector_size;
1532 nvdimm_check_and_set_ro(btt->btt_disk);
1537 put_disk(btt->btt_disk);
1541 static void btt_blk_cleanup(struct btt *btt)
1543 del_gendisk(btt->btt_disk);
1544 put_disk(btt->btt_disk);
1562 * Pointer to a new struct btt on success, NULL on failure.
1564 static struct btt *btt_init(struct nd_btt *nd_btt, unsigned long long rawsize,
1569 struct btt *btt;
1573 btt = devm_kzalloc(dev, sizeof(struct btt), GFP_KERNEL);
1574 if (!btt)
1577 btt->nd_btt = nd_btt;
1578 btt->rawsize = rawsize;
1579 btt->lbasize = lbasize;
1580 btt->sector_size = ((lbasize >= 4096) ? 4096 : 512);
1581 INIT_LIST_HEAD(&btt->arena_list);
1582 mutex_init(&btt->init_lock);
1583 btt->nd_region = nd_region;
1585 btt->phys_bb = &nsio->bb;
1587 ret = discover_arenas(btt);
1593 if (btt->init_state != INIT_READY && nd_region->ro) {
1594 dev_warn(dev, "%s is read-only, unable to init btt metadata\n",
1597 } else if (btt->init_state != INIT_READY) {
1598 btt->num_arenas = (rawsize / ARENA_MAX_SIZE) +
1601 btt->num_arenas, rawsize);
1603 ret = create_arenas(btt);
1609 ret = btt_meta_init(btt);
1616 ret = btt_blk_init(btt);
1622 btt_debugfs_init(btt);
1624 return btt;
1629 * @btt: the BTT handle that was generated by btt_init
1636 static void btt_fini(struct btt *btt)
1638 if (btt) {
1639 btt_blk_cleanup(btt);
1640 free_arenas(btt);
1641 debugfs_remove_recursive(btt->debugfs_dir);
1650 struct btt *btt;
1655 dev_dbg(&nd_btt->dev, "incomplete btt configuration\n");
1684 btt = btt_init(nd_btt, rawsize, nd_btt->lbasize, nd_btt->uuid,
1686 if (!btt)
1688 nd_btt->btt = btt;
1696 struct btt *btt = nd_btt->btt;
1698 btt_fini(btt);
1699 nd_btt->btt = NULL;
1709 debugfs_root = debugfs_create_dir("btt", NULL);