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authorStefan Richter <stefanr@s5r6.in-berlin.de>2009-06-30 20:28:31 +0200
committerStefan Richter <stefanr@s5r6.in-berlin.de>2009-07-02 21:27:01 +0200
commitebbb16bffa646f853899ef3fdc0ac7abab888703 (patch)
tree955396b0226b566ee443e1a32fe15c7216a3dd1d
parentaf2719415a5ceae06f2a6d33e78b555e64697fc8 (diff)
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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>
-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 a51ab233342..f599f493473 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 c5036f1cc5b..64a3a66a8a3 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