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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>
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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43
include/linux/ata.h
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@@ -105,6 +105,7 @@ enum {
ATA_ID_CFA_KEY_MGMT = 162,
ATA_ID_CFA_MODES = 163,
ATA_ID_DATA_SET_MGMT = 169,
ATA_ID_SCT_CMD_XPORT = 206,
ATA_ID_ROT_SPEED = 217,
ATA_ID_PIO4 = (1 << 1),
@@ -788,6 +789,48 @@ static inline bool ata_id_sense_reporting_enabled(const u16 *id)
return id[ATA_ID_COMMAND_SET_4] & (1 << 6);
}
/**
*
* Word: 206 - SCT Command Transport
* 15:12 - Vendor Specific
* 11:6 - Reserved
* 5 - SCT Command Transport Data Tables supported
* 4 - SCT Command Transport Features Control supported
* 3 - SCT Command Transport Error Recovery Control supported
* 2 - SCT Command Transport Write Same supported
* 1 - SCT Command Transport Long Sector Access supported
* 0 - SCT Command Transport supported
*/
static inline bool ata_id_sct_data_tables(const u16 *id)
{
return id[ATA_ID_SCT_CMD_XPORT] & (1 << 5) ? true : false;
}
static inline bool ata_id_sct_features_ctrl(const u16 *id)
{
return id[ATA_ID_SCT_CMD_XPORT] & (1 << 4) ? true : false;
}
static inline bool ata_id_sct_error_recovery_ctrl(const u16 *id)
{
return id[ATA_ID_SCT_CMD_XPORT] & (1 << 3) ? true : false;
}
static inline bool ata_id_sct_write_same(const u16 *id)
{
return id[ATA_ID_SCT_CMD_XPORT] & (1 << 2) ? true : false;
}
static inline bool ata_id_sct_long_sector_access(const u16 *id)
{
return id[ATA_ID_SCT_CMD_XPORT] & (1 << 1) ? true : false;
}
static inline bool ata_id_sct_supported(const u16 *id)
{
return id[ATA_ID_SCT_CMD_XPORT] & (1 << 0) ? true : false;
}
/**
* ata_id_major_version - get ATA level of drive
* @id: Identify data