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ATA_FORMAT_DSM_TRIM_(9) libata SCSI translation/emulat ATA_FORMAT_DSM_TRIM_(9)

NAME

ata_format_dsm_trim_descr - SATL Write Same to DSM Trim

SYNOPSIS

size_t ata_format_dsm_trim_descr(struct scsi_cmnd * cmd, u32 trmax, u64 sector, u32 count);

ARGUMENTS

struct scsi_cmnd * cmd

SCSI command being translated

u32 trmax

Maximum number of entries that will fit in sector_size bytes.

u64 sector

Starting sector

u32 count

Total Range of request in logical sectors

DESCRIPTION

Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted descriptor.

Upto 64 entries of the format: 63:48 Range Length 47:0 LBA

Range Length of 0 is ignored. LBA's should be sorted order and not overlap.

NOTE

this is the same format as ADD LBA(S) TO NV CACHE PINNED SET

RETURN

Number of bytes copied into sglist.

AUTHOR

Jeff Garzik

Author.

COPYRIGHT

September 2017 Kernel Hackers Manual 4.12