From: mengcong <mc@linux.vnet.ibm.com>
To: target-devel@vger.kernel.org
Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
meng cong <mc@linux.vnet.ibm.com>
Subject: [PATCH] target: Handle ATA_PASS_THROUGH_16 passthrough
Date: Wed, 16 May 2012 13:33:29 +0800 [thread overview]
Message-ID: <1337146409.18429.11.camel@mengcong> (raw)
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@linux.vnet.ibm.com>
---
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
next reply other threads:[~2012-05-16 6:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-16 5:33 mengcong [this message]
2012-05-16 7:38 ` [PATCH] target: Handle ATA_PASS_THROUGH_16 passthrough James Bottomley
2012-05-17 3:14 ` [PATCH] V2: " mengcong
2012-05-17 6:13 ` Nicholas A. Bellinger
2012-05-17 6:32 ` mengcong
2012-05-16 23:41 ` [PATCH] " Nicholas A. Bellinger
2012-05-17 6:22 ` mengcong
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