On 08/22/2016 06:23 AM, Shaun Tancheff wrote: > 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@xxxxxxxxxxx> > --- > v6: > - Change to use sg_copy_from_buffer as per Christoph Hellwig <hch@xxxxxx> > v5: > - Addressed review comments > - Report support for ZBC only for zoned devices. > - kmap page during rewrite > - Fix unmap set to require trim or error, if not unmap then sct write > same or error. > v4: > - Added partial MAINTENANCE_IN opcode simulation > - Dropped all changes in drivers/scsi/* > - Changed to honor the UNMAP flag -> TRIM, no UNMAP -> SCT. > v3: > - Demux UNMAP/TRIM from WRITE SAME > v2: > - Remove fugly ata hacking from sd.c > > drivers/ata/libata-scsi.c | 199 +++++++++++++++++++++++++++++++++++++++------- > include/linux/ata.h | 43 ++++++++++ > 2 files changed, 213 insertions(+), 29 deletions(-) > Reviewed-by: Hannes Reinecke <hare@xxxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@xxxxxxx +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
