struct list_head lu_list;
u64 management_agent_address;
+ u64 guid;
int directory_id;
int node_id;
int address_high;
#define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */
#define SBP2_ORB_NULL 0x80000000
#define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000
-#define SBP2_RETRY_LIMIT 0xf /* 15 retries */
-
-#define SBP2_DIRECTION_TO_MEDIA 0x0
-#define SBP2_DIRECTION_FROM_MEDIA 0x1
+#define SBP2_RETRY_LIMIT 0xf /* 15 retries */
+#define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */
/* Unit directory keys */
#define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a
#define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19)
#define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20)
#define COMMAND_ORB_SPEED(v) ((v) << 24)
-#define COMMAND_ORB_DIRECTION(v) ((v) << 27)
+#define COMMAND_ORB_DIRECTION ((1) << 27)
#define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29)
#define COMMAND_ORB_NOTIFY ((1) << 31)
if (!tgt->dont_block && !lu->blocked &&
lu->generation != card->generation) {
lu->blocked = true;
- if (++tgt->blocked == 1) {
+ if (++tgt->blocked == 1)
scsi_block_requests(shost);
- fw_notify("blocked %s\n", lu->tgt->bus_id);
- }
}
spin_unlock_irqrestore(&card->lock, flags);
}
}
spin_unlock_irqrestore(&card->lock, flags);
- if (unblock) {
+ if (unblock)
scsi_unblock_requests(shost);
- fw_notify("unblocked %s\n", lu->tgt->bus_id);
- }
}
/*
kfree(lu);
}
scsi_remove_host(shost);
- fw_notify("released %s\n", tgt->bus_id);
+ fw_notify("released %s, target %d:0:0\n", tgt->bus_id, shost->host_no);
fw_unit_put(tgt->unit);
scsi_host_put(shost);
complete(done);
}
+/*
+ * Write retransmit retry values into the BUSY_TIMEOUT register.
+ * - The single-phase retry protocol is supported by all SBP-2 devices, but the
+ * default retry_limit value is 0 (i.e. never retry transmission). We write a
+ * saner value after logging into the device.
+ * - The dual-phase retry protocol is optional to implement, and if not
+ * supported, writes to the dual-phase portion of the register will be
+ * ignored. We try to write the original 1394-1995 default here.
+ * - In the case of devices that are also SBP-3-compliant, all writes are
+ * ignored, as the register is read-only, but contains single-phase retry of
+ * 15, which is what we're trying to set for all SBP-2 device anyway, so this
+ * write attempt is safe and yields more consistent behavior for all devices.
+ *
+ * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec,
+ * and section 6.4 of the SBP-3 spec for further details.
+ */
static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu)
{
struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
struct fw_transaction t;
static __be32 busy_timeout;
- /* FIXME: we should try to set dual-phase cycle_limit too */
- busy_timeout = cpu_to_be32(SBP2_RETRY_LIMIT);
+ busy_timeout = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT);
fw_send_request(device->card, &t, TCODE_WRITE_QUADLET_REQUEST,
lu->tgt->node_id, lu->generation, device->max_speed,
break;
case SBP2_CSR_LOGICAL_UNIT_DIRECTORY:
- if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0)
+ /* Adjust for the increment in the iterator */
+ if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0)
return -ENOMEM;
break;
}
kref_init(&tgt->kref);
INIT_LIST_HEAD(&tgt->lu_list);
tgt->bus_id = unit->device.bus_id;
+ tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
if (fw_device_enable_phys_dma(device) < 0)
goto fail_shost_put;
orb->cmd = cmd;
orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL);
- orb->request.next.low = 0x0;
/*
* At speed 100 we can do 512 bytes per packet, at speed 200,
* 1024 bytes per packet etc. The SBP-2 max_payload field
COMMAND_ORB_NOTIFY);
if (cmd->sc_data_direction == DMA_FROM_DEVICE)
- orb->request.misc |= cpu_to_be32(
- COMMAND_ORB_DIRECTION(SBP2_DIRECTION_FROM_MEDIA));
- else if (cmd->sc_data_direction == DMA_TO_DEVICE)
- orb->request.misc |= cpu_to_be32(
- COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA));
+ orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION);
if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
goto out;
- memset(orb->request.command_block,
- 0, sizeof(orb->request.command_block));
- memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
+ memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len);
orb->base.callback = complete_command_orb;
orb->base.request_bus =
{
struct scsi_device *sdev = to_scsi_device(dev);
struct sbp2_logical_unit *lu;
- struct fw_device *device;
if (!sdev)
return 0;
lu = sdev->hostdata;
- device = fw_device(lu->tgt->unit->device.parent);
- return sprintf(buf, "%08x%08x:%06x:%04x\n",
- device->config_rom[3], device->config_rom[4],
+ return sprintf(buf, "%016llx:%06x:%04x\n",
+ (unsigned long long)lu->tgt->guid,
lu->tgt->directory_id, lu->lun);
}