diff options
Diffstat (limited to 'include/linux/t10-pi.h')
| -rw-r--r-- | include/linux/t10-pi.h | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/include/linux/t10-pi.h b/include/linux/t10-pi.h index 635a3c5706bd..2c59fe3efcd4 100644 --- a/include/linux/t10-pi.h +++ b/include/linux/t10-pi.h @@ -1,8 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_T10_PI_H #define _LINUX_T10_PI_H #include <linux/types.h> -#include <linux/blkdev.h> +#include <linux/blk-mq.h> /* * A T10 PI-capable target device can be formatted with different @@ -36,9 +37,39 @@ struct t10_pi_tuple { #define T10_PI_APP_ESCAPE cpu_to_be16(0xffff) #define T10_PI_REF_ESCAPE cpu_to_be32(0xffffffff) -extern const struct blk_integrity_profile t10_pi_type1_crc; -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; +static inline u32 t10_pi_ref_tag(struct request *rq) +{ + unsigned int shift = ilog2(queue_logical_block_size(rq->q)); + + if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY) && + rq->q->limits.integrity.interval_exp) + shift = rq->q->limits.integrity.interval_exp; + return blk_rq_pos(rq) >> (shift - SECTOR_SHIFT) & 0xffffffff; +} + +struct crc64_pi_tuple { + __be64 guard_tag; + __be16 app_tag; + __u8 ref_tag[6]; +}; + +/** + * lower_48_bits() - return bits 0-47 of a number + * @n: the number we're accessing + */ +static inline u64 lower_48_bits(u64 n) +{ + return n & ((1ull << 48) - 1); +} + +static inline u64 ext_pi_ref_tag(struct request *rq) +{ + unsigned int shift = ilog2(queue_logical_block_size(rq->q)); + + if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY) && + rq->q->limits.integrity.interval_exp) + shift = rq->q->limits.integrity.interval_exp; + return lower_48_bits(blk_rq_pos(rq) >> (shift - SECTOR_SHIFT)); +} #endif |