Added the ability to send ATA identify and Data Set Management (DSM) TRIM

commands to an ATA device attached via a SCSI control.

sys/cam/scsi/scsi_all.c:
        - Added scsi_ata_identify, scsi_ata_trim
          Which use ATA Pass-Through to send commands to the attached disk.

sys/cam/scsi/scsi_all.h:
        - Added defines for all missing ATA Pass-Through commands values.

        - Added scsi_ata_identify, scsi_ata_trim methods used in ATA TRIM
          support.

        - Added scsi_vpd_logical_block_prov structure used when querying for
          the supported sizes UNMAP commands.

        - Added scsi_vpd_block_limits structure used when querying for the
          supported sizes of the UNMAP command.

Reviewed by:	mav
Approved by:	pjd (mentor)
MFC after:	2 weeks

2 files changed, 118 insertions, 0 deletions

diff --git a/sys/cam/scsi/scsi_all.c b/sys/cam/scsi/scsi_all.c
index b28c29d..e206edf 100644
--- a/sys/cam/scsi/scsi_all.c
+++ b/sys/cam/scsi/scsi_all.c
@@ -5853,6 +5853,57 @@ scsi_write_same(struct ccb_scsiio *csio, u_int32_t retries,
 }
 
 void
+scsi_ata_identify(struct ccb_scsiio *csio, u_int32_t retries,
+		  void (*cbfcnp)(struct cam_periph *, union ccb *),
+		  u_int8_t tag_action, u_int8_t *data_ptr,
+		  u_int16_t dxfer_len, u_int8_t sense_len,
+		  u_int32_t timeout)
+{
+	scsi_ata_pass_16(csio,
+			 retries,
+			 cbfcnp,
+			 /*flags*/CAM_DIR_IN,
+			 tag_action,
+			 /*protocol*/AP_PROTO_PIO_IN,
+			 /*ata_flags*/AP_FLAG_TDIR_FROM_DEV|
+				AP_FLAG_BYT_BLOK_BYTES|AP_FLAG_TLEN_SECT_CNT,
+			 /*features*/0,
+			 /*sector_count*/dxfer_len,
+			 /*lba*/0,
+			 /*command*/ATA_ATA_IDENTIFY,
+			 /*control*/0,
+			 data_ptr,
+			 dxfer_len,
+			 sense_len,
+			 timeout);
+}
+
+void
+scsi_ata_trim(struct ccb_scsiio *csio, u_int32_t retries,
+	      void (*cbfcnp)(struct cam_periph *, union ccb *),
+	      u_int8_t tag_action, u_int16_t block_count,
+	      u_int8_t *data_ptr, u_int16_t dxfer_len, u_int8_t sense_len,
+	      u_int32_t timeout)
+{
+	scsi_ata_pass_16(csio,
+			 retries,
+			 cbfcnp,
+			 /*flags*/CAM_DIR_OUT,
+			 tag_action,
+			 /*protocol*/AP_EXTEND|AP_PROTO_DMA,
+			 /*ata_flags*/AP_FLAG_TLEN_SECT_CNT|AP_FLAG_BYT_BLOK_BLOCKS,
+			 /*features*/ATA_DSM_TRIM,
+			 /*sector_count*/block_count,
+			 /*lba*/0,
+			 /*command*/ATA_DATA_SET_MANAGEMENT,
+			 /*control*/0,
+			 data_ptr,
+			 dxfer_len,
+			 sense_len,
+			 timeout);
+}
+
+void
 scsi_ata_pass_16(struct ccb_scsiio *csio, u_int32_t retries,
 		 void (*cbfcnp)(struct cam_periph *, union ccb *),
 		 u_int32_t flags, u_int8_t tag_action,
diff --git a/sys/cam/scsi/scsi_all.h b/sys/cam/scsi/scsi_all.h
index 0b108ca..d2872a0 100644
--- a/sys/cam/scsi/scsi_all.h
+++ b/sys/cam/scsi/scsi_all.h
@@ -1429,6 +1429,61 @@ struct scsi_diag_page {
 	uint8_t params[0];
 };
 
+/*
+ * Logical Block Provisioning VPD Page based on
+ * T10/1799-D Revision 31
+ */
+struct scsi_vpd_logical_block_prov
+{
+	u_int8_t device;
+	u_int8_t page_code;
+#define	SVPD_LBP		0xB2
+	u_int8_t page_length[2];
+#define SVPD_LBP_PL_BASIC	0x04
+	u_int8_t threshold_exponent;
+	u_int8_t flags;
+#define SVPD_LBP_UNMAP		0x80
+#define SVPD_LBP_WS16		0x40
+#define SVPD_LBP_WS10		0x20
+#define SVPD_LBP_RZ		0x04
+#define SVPD_LBP_ANC_SUP	0x02
+#define SVPD_LBP_DP		0x01
+	u_int8_t prov_type;
+#define SVPD_LBP_RESOURCE	0x01
+#define SVPD_LBP_THIN		0x02
+	u_int8_t reserved;
+	/*
+	 * Provisioning Group Descriptor can be here if SVPD_LBP_DP is set
+	 * Its size can be determined from page_length - 4
+	 */
+};
+
+/*
+ * Block Limits VDP Page based on
+ * T10/1799-D Revision 31
+ */
+struct scsi_vpd_block_limits
+{
+	u_int8_t device;
+	u_int8_t page_code;
+#define	SVPD_BLOCK_LIMITS	0xB0
+	u_int8_t page_length[2];
+#define SVPD_BL_PL_BASIC	0x10
+#define SVPD_BL_PL_TP		0x3C
+	u_int8_t reserved1;
+	u_int8_t max_cmp_write_len;
+	u_int8_t opt_txfer_len_grain[2];
+	u_int8_t max_txfer_len[4];
+	u_int8_t opt_txfer_len[4];
+	u_int8_t max_prefetch[4];
+	u_int8_t max_unmap_lba_cnt[4];
+	u_int8_t max_unmap_blk_cnt[4];
+	u_int8_t opt_unmap_grain[4];
+	u_int8_t unmap_grain_align[4];
+	u_int8_t max_write_same_length[8];
+	u_int8_t reserved2[20];
+};
+
 struct scsi_read_capacity
 {
 	u_int8_t opcode;
@@ -2396,6 +2451,18 @@ void scsi_write_same(struct ccb_scsiio *csio, u_int32_t retries,
 		     u_int32_t dxfer_len, u_int8_t sense_len,
 		     u_int32_t timeout);
 
+void scsi_ata_identify(struct ccb_scsiio *csio, u_int32_t retries,
+		       void (*cbfcnp)(struct cam_periph *, union ccb *),
+		       u_int8_t tag_action, u_int8_t *data_ptr,
+		       u_int16_t dxfer_len, u_int8_t sense_len,
+		       u_int32_t timeout);
+
+void scsi_ata_trim(struct ccb_scsiio *csio, u_int32_t retries,
+	           void (*cbfcnp)(struct cam_periph *, union ccb *),
+	           u_int8_t tag_action, u_int16_t block_count,
+	           u_int8_t *data_ptr, u_int16_t dxfer_len,
+	           u_int8_t sense_len, u_int32_t timeout);
+
 void scsi_ata_pass_16(struct ccb_scsiio *csio, u_int32_t retries,
 		      void (*cbfcnp)(struct cam_periph *, union ccb *),
 		      u_int32_t flags, u_int8_t tag_action,