From a7d4383f17e10f338ea757a849f02298790d24fb Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Thu, 3 Mar 2022 12:13:11 -0800 Subject: block: add pi for extended integrity The NVMe specification defines new data integrity formats beyond the t10 tuple. Add support for the specification defined CRC64 formats, assuming the reference tag does not need to be split with the "storage tag". Cc: Hannes Reinecke Cc: "Martin K. Petersen" Signed-off-by: Keith Busch Reviewed-by: Martin K. Petersen Link: https://lore.kernel.org/r/20220303201312.3255347-8-kbusch@kernel.org Signed-off-by: Jens Axboe --- include/linux/t10-pi.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'include/linux/t10-pi.h') diff --git a/include/linux/t10-pi.h b/include/linux/t10-pi.h index c635c2e014e3..a4b1af581f69 100644 --- a/include/linux/t10-pi.h +++ b/include/linux/t10-pi.h @@ -53,4 +53,24 @@ extern const struct blk_integrity_profile t10_pi_type1_ip; extern const struct blk_integrity_profile t10_pi_type3_crc; extern const struct blk_integrity_profile t10_pi_type3_ip; +struct crc64_pi_tuple { + __be64 guard_tag; + __be16 app_tag; + __u8 ref_tag[6]; +}; + +static inline u64 ext_pi_ref_tag(struct request *rq) +{ + unsigned int shift = ilog2(queue_logical_block_size(rq->q)); + +#ifdef CONFIG_BLK_DEV_INTEGRITY + if (rq->q->integrity.interval_exp) + shift = rq->q->integrity.interval_exp; +#endif + return lower_48_bits(blk_rq_pos(rq) >> (shift - SECTOR_SHIFT)); +} + +extern const struct blk_integrity_profile ext_pi_type1_crc64; +extern const struct blk_integrity_profile ext_pi_type3_crc64; + #endif -- cgit v1.2.1