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asm-generic: introduce be48 unaligned accessors 

The NVMe protocol extended the data integrity fields with unaligned
48-bit reference tags. Provide some helper accessors in
preparation for these.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20220303201312.3255347-4-kbusch@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Keith Busch 2022-03-03 12:13:07 -08:00 committed by Jens Axboe
parent 84b735429f
commit c2ea5fcf53
1 changed files with 26 additions and 0 deletions
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26
include/asm-generic/unaligned.h
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@ -126,4 +126,30 @@ static inline void put_unaligned_le24(const u32 val, void *p)
__put_unaligned_le24(val, p);
}
static inline void __put_unaligned_be48(const u64 val, __u8 *p)
{
*p++ = val >> 40;
*p++ = val >> 32;
*p++ = val >> 24;
*p++ = val >> 16;
*p++ = val >> 8;
*p++ = val;
}
static inline void put_unaligned_be48(const u64 val, void *p)
{
__put_unaligned_be48(val, p);
}
static inline u64 __get_unaligned_be48(const u8 *p)
{
return (u64)p[0] << 40 | (u64)p[1] << 32 | p[2] << 24 |
p[3] << 16 | p[4] << 8 | p[5];
}
static inline u64 get_unaligned_be48(const void *p)
{
return __get_unaligned_be48(p);
}
#endif /* __ASM_GENERIC_UNALIGNED_H */