diff options
Diffstat (limited to 'drivers/firewire/fw-sbp2.c')
| -rw-r--r-- | drivers/firewire/fw-sbp2.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index 68300414e5f4..a98d3915e26f 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c @@ -1108,6 +1108,58 @@ static int sbp2_scsi_abort(struct scsi_cmnd *cmd) return SUCCESS; } +/* + * Format of /sys/bus/scsi/devices/.../ieee1394_id: + * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) + * + * This is the concatenation of target port identifier and logical unit + * identifier as per SAM-2...SAM-4 annex A. + */ +static ssize_t +sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct sbp2_device *sd; + struct fw_unit *unit; + struct fw_device *device; + u32 directory_id; + struct fw_csr_iterator ci; + int key, value, lun; + + if (!sdev) + return 0; + sd = (struct sbp2_device *)sdev->host->hostdata; + unit = sd->unit; + device = fw_device(unit->device.parent); + + /* implicit directory ID */ + directory_id = ((unit->directory - device->config_rom) * 4 + + CSR_CONFIG_ROM) & 0xffffff; + + /* explicit directory ID, overrides implicit ID if present */ + fw_csr_iterator_init(&ci, unit->directory); + while (fw_csr_iterator_next(&ci, &key, &value)) + if (key == CSR_DIRECTORY_ID) { + directory_id = value; + break; + } + + /* FIXME: Make this work for multi-lun devices. */ + lun = 0; + + return sprintf(buf, "%08x%08x:%06x:%04x\n", + device->config_rom[3], device->config_rom[4], + directory_id, lun); +} + +static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); + +static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { + &dev_attr_ieee1394_id, + NULL +}; + static struct scsi_host_template scsi_driver_template = { .module = THIS_MODULE, .name = "SBP-2 IEEE-1394", @@ -1121,6 +1173,7 @@ static struct scsi_host_template scsi_driver_template = { .use_clustering = ENABLE_CLUSTERING, .cmd_per_lun = 1, .can_queue = 1, + .sdev_attrs = sbp2_scsi_sysfs_attrs, }; MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |