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authorShaun Tancheff <shaun@tancheff.com>2016-08-22 07:23:19 +0300
committerTejun Heo <tj@kernel.org>2016-08-25 18:26:48 +0300
commit7b20309428598df00ffeb0b01f5948dea6aaf1f7 (patch)
tree101fa3f176dc5f3829e000852913a514a7fa068c /include/linux/ata.h
parent9379e6b8e0f995365dc6158a1463c8dab4f2c8da (diff)
downloadlinux-7b20309428598df00ffeb0b01f5948dea6aaf1f7.tar.xz
libata: Add support for SCT Write Same
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>
Diffstat (limited to 'include/linux/ata.h')
-rw-r--r--include/linux/ata.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 45a1d71c55f1..fdb180367ba1 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -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),
@@ -789,6 +790,48 @@ static inline bool ata_id_sense_reporting_enabled(const u16 *id)
}
/**
+ *
+ * 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
*