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authorStefan Richter <stefanr@s5r6.in-berlin.de>2009-06-30 22:28:31 +0400
committerStefan Richter <stefanr@s5r6.in-berlin.de>2009-07-02 23:27:01 +0400
commitebbb16bffa646f853899ef3fdc0ac7abab888703 (patch)
tree955396b0226b566ee443e1a32fe15c7216a3dd1d /drivers/ieee1394
parentaf2719415a5ceae06f2a6d33e78b555e64697fc8 (diff)
downloadlinux-ebbb16bffa646f853899ef3fdc0ac7abab888703.tar.xz
ieee1394: sbp2: add support for disks >2 TB (and 16 bytes long CDBs)
Increase the command ORB data structure to transport up to 16 bytes long CDBs (instead of 12 bytes), and tell the SCSI mid layer about it. This is notably necessary for READ CAPACITY(16) and friends, i.e. support of large disks. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/ieee1394')
-rw-r--r--drivers/ieee1394/sbp2.c1
-rw-r--r--drivers/ieee1394/sbp2.h8
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index a51ab233342d..f599f4934739 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -880,6 +880,7 @@ static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
}
shost->hostdata[0] = (unsigned long)lu;
+ shost->max_cmd_len = SBP2_MAX_CDB_SIZE;
if (!scsi_add_host(shost, &ud->device)) {
lu->shost = shost;
diff --git a/drivers/ieee1394/sbp2.h b/drivers/ieee1394/sbp2.h
index c5036f1cc5b0..64a3a66a8a39 100644
--- a/drivers/ieee1394/sbp2.h
+++ b/drivers/ieee1394/sbp2.h
@@ -25,6 +25,12 @@
#define SBP2_DEVICE_NAME "sbp2"
/*
+ * There is no transport protocol limit to the CDB length, but we implement
+ * a fixed length only. 16 bytes is enough for disks larger than 2 TB.
+ */
+#define SBP2_MAX_CDB_SIZE 16
+
+/*
* SBP-2 specific definitions
*/
@@ -51,7 +57,7 @@ struct sbp2_command_orb {
u32 data_descriptor_hi;
u32 data_descriptor_lo;
u32 misc;
- u8 cdb[12];
+ u8 cdb[SBP2_MAX_CDB_SIZE];
} __attribute__((packed));
#define SBP2_LOGIN_REQUEST 0x0