libata: Add support for SCT Write Same

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SATA drives may support write same via SCT. This is useful
for setting the drive contents to a specific pattern (0's).

Translate a SCSI WRITE SAME 16 command to be either a DSM TRIM
command or an SCT Write Same command.

Based on the UNMAP flag:
  - When set translate to DSM TRIM
  - When not set translate to SCT Write Same

Signed-off-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Acked-by: Tejun Heo <tj@kernel.org>

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This commit is contained in:

Shaun Tancheff 2016-08-21 23:23:19 -05:00 • committed by Tejun Heo

parent 9379e6b8e0

commit 7b20309428

2 changed files with 213 additions and 29 deletions

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199

drivers/ata/libata-scsi.c

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43

include/linux/ata.h

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