diff options
| author | Chris Boot <bootc@bootc.net> | 2012-02-15 14:59:08 +0000 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2012-02-22 22:36:01 +0100 |
| commit | 8ff6a75744dfc0ea19a03c0ac5a438ef8d825342 (patch) | |
| tree | 218244aab1394d4823df06ccdab08248dc756aa3 /drivers/firewire/sbp2.c | |
| parent | e894d1d7fd8cfa89a085df2d368a5e652751b0a1 (diff) | |
| download | linux-8ff6a75744dfc0ea19a03c0ac5a438ef8d825342.tar.bz2 | |
firewire: sbp2: Take into account Unit_Unique_ID
If the target's unit directory contains a Unit_Unique_ID entry, we
should use that as the target's GUID for identification purposes. The
SBP-2 standards document says:
"Although the node unique ID (EUI-64) present in the bus information
block is sufficient to uniquely identify nodes attached to Serial Bus,
it is insufficient to identify a target when a vendor implements a
device with multiple Serial Bus node connections. In this case initiator
software requires information by which a particular target may be
uniquely identified, regardless of the Serial Bus access path used."
[ IEEE T10 P1155D Revision 4, Section 7.6 (page 51) ] and
[ IEEE T10 P1467D Revision 5, Section 7.9 (page 74) ]
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/sbp2.c')
| -rw-r--r-- | drivers/firewire/sbp2.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/firewire/sbp2.c b/drivers/firewire/sbp2.c index 481e1c855c55..4865d641329a 100644 --- a/drivers/firewire/sbp2.c +++ b/drivers/firewire/sbp2.c @@ -218,6 +218,7 @@ static const struct device *lu_dev(const struct sbp2_logical_unit *lu) #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a #define SBP2_CSR_FIRMWARE_REVISION 0x3c #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 +#define SBP2_CSR_UNIT_UNIQUE_ID 0x8d #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 /* Management orb opcodes */ @@ -1005,6 +1006,13 @@ static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) return 0; } +static void sbp2_get_unit_unique_id(struct sbp2_target *tgt, + const u32 *leaf) +{ + if ((leaf[0] & 0xffff0000) == 0x00020000) + tgt->guid = (u64)leaf[1] << 32 | leaf[2]; +} + static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, const u32 *directory) { @@ -1056,6 +1064,10 @@ static int sbp2_scan_unit_dir(struct sbp2_target *tgt, const u32 *directory, return -ENOMEM; break; + case SBP2_CSR_UNIT_UNIQUE_ID: + sbp2_get_unit_unique_id(tgt, ci.p - 1 + value); + break; + case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: /* Adjust for the increment in the iterator */ if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0) |