The cdrecord uses ATA_PASS_THROUGH_16 command while burning CDs
with a SATA CD-ROM. This patch adds support to it so that PSCSI
CD-ROM passthrough works with the cdrecord.
Signed-off-by: Cong Meng <mc@xxxxxxxxxxxxxxxxxx>
---
drivers/target/target_core_transport.c | 30 ++++++++++++++++++++++++++++++
include/scsi/scsi.h | 1 +
2 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 2d75c29..41439b3 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2926,6 +2926,36 @@ static int transport_generic_cmd_sequencer(
size = (cdb[7] << 8) | cdb[8];
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
break;
+ case ATA_PASS_THROUGH_16:
+ // T_LENGTH
+ switch (cdb[2] & 0x3) {
+ case 0x0:
+ sectors = 0;
+ break;
+ case 0x1:
+ sectors = (((cdb[1] & 0x1) ? cdb[3] : 0) << 8) | cdb[4];
+ break;
+ case 0x2:
+ sectors = (((cdb[1] & 0x1) ? cdb[5] : 0) << 8) | cdb[6];
+ break;
+ case 0x3:
+ pr_err("T_LENGTH=0x3 not supported\n");
+ goto out_invalid_cdb_field;
+ break;
+ }
+
+ // BYTE_BLOCK
+ if (cdb[2] & 0x4) {
+ // BLOCK
+ // T_TYPE: 512 or sector
+ size = sectors * ((cdb[2] & 0x10) ?
+ dev->se_sub_dev->se_dev_attrib.block_size : 512);
+ } else {
+ // BYTE
+ size = sectors;
+ }
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
default:
pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
" 0x%02x, sending CHECK_CONDITION.\n",
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index f34a5a8..f6dcd25 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -116,6 +116,7 @@ struct scsi_cmnd;
#define PERSISTENT_RESERVE_IN 0x5e
#define PERSISTENT_RESERVE_OUT 0x5f
#define VARIABLE_LENGTH_CMD 0x7f
+#define ATA_PASS_THROUGH_16 0x85
#define REPORT_LUNS 0xa0
#define SECURITY_PROTOCOL_IN 0xa2
#define MAINTENANCE_IN 0xa3
--
1.7.7
--
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