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@@ -56,6 +56,18 @@ static int debug_fcoe;
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#define FCOE_WORD_TO_BYTE 4
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+#define FCOE_VERSION "0.1"
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+#define FCOE_NAME "fcoe"
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+#define FCOE_VENDOR "Open-FCoE.org"
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+
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+#define FCOE_MAX_LUN 255
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+#define FCOE_MAX_FCP_TARGET 256
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+
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+#define FCOE_MAX_OUTSTANDING_COMMANDS 1024
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+
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+#define FCOE_MIN_XID 0x0001 /* the min xid supported by fcoe_sw */
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+#define FCOE_MAX_XID 0x07ef /* the max xid supported by fcoe_sw */
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+
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MODULE_AUTHOR("Open-FCoE.org");
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MODULE_DESCRIPTION("FCoE");
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MODULE_LICENSE("GPL");
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@@ -79,6 +91,479 @@ static struct notifier_block fcoe_notifier = {
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.notifier_call = fcoe_device_notification,
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};
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+static struct scsi_transport_template *scsi_transport_fcoe_sw;
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+
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+struct fc_function_template fcoe_transport_function = {
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+ .show_host_node_name = 1,
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+ .show_host_port_name = 1,
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+ .show_host_supported_classes = 1,
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+ .show_host_supported_fc4s = 1,
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+ .show_host_active_fc4s = 1,
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+ .show_host_maxframe_size = 1,
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+
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+ .show_host_port_id = 1,
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+ .show_host_supported_speeds = 1,
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+ .get_host_speed = fc_get_host_speed,
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+ .show_host_speed = 1,
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+ .show_host_port_type = 1,
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+ .get_host_port_state = fc_get_host_port_state,
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+ .show_host_port_state = 1,
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+ .show_host_symbolic_name = 1,
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+
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+ .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
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+ .show_rport_maxframe_size = 1,
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+ .show_rport_supported_classes = 1,
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+
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+ .show_host_fabric_name = 1,
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+ .show_starget_node_name = 1,
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+ .show_starget_port_name = 1,
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+ .show_starget_port_id = 1,
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+ .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
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+ .show_rport_dev_loss_tmo = 1,
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+ .get_fc_host_stats = fc_get_host_stats,
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+ .issue_fc_host_lip = fcoe_reset,
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+
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+ .terminate_rport_io = fc_rport_terminate_io,
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+};
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+
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+static struct scsi_host_template fcoe_shost_template = {
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+ .module = THIS_MODULE,
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+ .name = "FCoE Driver",
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+ .proc_name = FCOE_NAME,
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+ .queuecommand = fc_queuecommand,
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+ .eh_abort_handler = fc_eh_abort,
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+ .eh_device_reset_handler = fc_eh_device_reset,
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+ .eh_host_reset_handler = fc_eh_host_reset,
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+ .slave_alloc = fc_slave_alloc,
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+ .change_queue_depth = fc_change_queue_depth,
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+ .change_queue_type = fc_change_queue_type,
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+ .this_id = -1,
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+ .cmd_per_lun = 32,
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+ .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
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+ .use_clustering = ENABLE_CLUSTERING,
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+ .sg_tablesize = SG_ALL,
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+ .max_sectors = 0xffff,
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+};
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+
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+/**
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+ * fcoe_lport_config() - sets up the fc_lport
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+ * @lp: ptr to the fc_lport
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+ * @shost: ptr to the parent scsi host
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+ *
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+ * Returns: 0 for success
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+ */
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+static int fcoe_lport_config(struct fc_lport *lp)
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+{
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+ lp->link_up = 0;
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+ lp->qfull = 0;
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+ lp->max_retry_count = 3;
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+ lp->e_d_tov = 2 * 1000; /* FC-FS default */
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+ lp->r_a_tov = 2 * 2 * 1000;
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+ lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
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+ FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
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+
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+ fc_lport_init_stats(lp);
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+
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+ /* lport fc_lport related configuration */
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+ fc_lport_config(lp);
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+
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+ /* offload related configuration */
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+ lp->crc_offload = 0;
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+ lp->seq_offload = 0;
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+ lp->lro_enabled = 0;
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+ lp->lro_xid = 0;
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+ lp->lso_max = 0;
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+
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+ return 0;
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+}
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+
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+/**
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+ * fcoe_netdev_config() - Set up netdev for SW FCoE
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+ * @lp : ptr to the fc_lport
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+ * @netdev : ptr to the associated netdevice struct
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+ *
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+ * Must be called after fcoe_lport_config() as it will use lport mutex
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+ *
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+ * Returns : 0 for success
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+ */
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+static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
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+{
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+ u32 mfs;
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+ u64 wwnn, wwpn;
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+ struct fcoe_softc *fc;
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+ u8 flogi_maddr[ETH_ALEN];
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+
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+ /* Setup lport private data to point to fcoe softc */
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+ fc = lport_priv(lp);
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+ fc->lp = lp;
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+ fc->real_dev = netdev;
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+ fc->phys_dev = netdev;
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+
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+ /* Require support for get_pauseparam ethtool op. */
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+ if (netdev->priv_flags & IFF_802_1Q_VLAN)
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+ fc->phys_dev = vlan_dev_real_dev(netdev);
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+
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+ /* Do not support for bonding device */
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+ if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
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+ (fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
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+ (fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
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+ return -EOPNOTSUPP;
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+ }
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+
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+ /*
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+ * Determine max frame size based on underlying device and optional
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+ * user-configured limit. If the MFS is too low, fcoe_link_ok()
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+ * will return 0, so do this first.
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+ */
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+ mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
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+ sizeof(struct fcoe_crc_eof));
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+ if (fc_set_mfs(lp, mfs))
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+ return -EINVAL;
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+
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+ if (!fcoe_link_ok(lp))
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+ lp->link_up = 1;
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+
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+ /* offload features support */
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+ if (fc->real_dev->features & NETIF_F_SG)
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+ lp->sg_supp = 1;
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+
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+#ifdef NETIF_F_FCOE_CRC
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+ if (netdev->features & NETIF_F_FCOE_CRC) {
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+ lp->crc_offload = 1;
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+ printk(KERN_DEBUG "fcoe:%s supports FCCRC offload\n",
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+ netdev->name);
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+ }
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+#endif
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+#ifdef NETIF_F_FSO
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+ if (netdev->features & NETIF_F_FSO) {
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+ lp->seq_offload = 1;
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+ lp->lso_max = netdev->gso_max_size;
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+ printk(KERN_DEBUG "fcoe:%s supports LSO for max len 0x%x\n",
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+ netdev->name, lp->lso_max);
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+ }
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+#endif
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+ if (netdev->fcoe_ddp_xid) {
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+ lp->lro_enabled = 1;
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+ lp->lro_xid = netdev->fcoe_ddp_xid;
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+ printk(KERN_DEBUG "fcoe:%s supports LRO for max xid 0x%x\n",
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+ netdev->name, lp->lro_xid);
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+ }
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+ skb_queue_head_init(&fc->fcoe_pending_queue);
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+ fc->fcoe_pending_queue_active = 0;
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+
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+ /* setup Source Mac Address */
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+ memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr,
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+ fc->real_dev->addr_len);
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+
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+ wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
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+ fc_set_wwnn(lp, wwnn);
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+ /* XXX - 3rd arg needs to be vlan id */
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+ wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
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+ fc_set_wwpn(lp, wwpn);
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+
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+ /*
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+ * Add FCoE MAC address as second unicast MAC address
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+ * or enter promiscuous mode if not capable of listening
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+ * for multiple unicast MACs.
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+ */
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+ rtnl_lock();
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+ memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
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+ dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
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+ rtnl_unlock();
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+
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+ /*
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+ * setup the receive function from ethernet driver
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+ * on the ethertype for the given device
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+ */
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+ fc->fcoe_packet_type.func = fcoe_rcv;
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+ fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
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+ fc->fcoe_packet_type.dev = fc->real_dev;
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+ dev_add_pack(&fc->fcoe_packet_type);
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+
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+ return 0;
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+}
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+
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+/**
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+ * fcoe_shost_config() - Sets up fc_lport->host
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+ * @lp : ptr to the fc_lport
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+ * @shost : ptr to the associated scsi host
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+ * @dev : device associated to scsi host
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+ *
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+ * Must be called after fcoe_lport_config() and fcoe_netdev_config()
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+ *
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+ * Returns : 0 for success
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+ */
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+static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
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+ struct device *dev)
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+{
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+ int rc = 0;
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+
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+ /* lport scsi host config */
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+ lp->host = shost;
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+
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+ lp->host->max_lun = FCOE_MAX_LUN;
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+ lp->host->max_id = FCOE_MAX_FCP_TARGET;
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+ lp->host->max_channel = 0;
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+ lp->host->transportt = scsi_transport_fcoe_sw;
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+
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+ /* add the new host to the SCSI-ml */
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+ rc = scsi_add_host(lp->host, dev);
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+ if (rc) {
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+ FC_DBG("fcoe_shost_config:error on scsi_add_host\n");
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+ return rc;
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+ }
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+ sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
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+ FCOE_NAME, FCOE_VERSION,
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+ fcoe_netdev(lp)->name);
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+
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+ return 0;
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+}
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+
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+/**
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+ * fcoe_em_config() - allocates em for this lport
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+ * @lp: the port that em is to allocated for
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+ *
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+ * Returns : 0 on success
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+ */
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+static inline int fcoe_em_config(struct fc_lport *lp)
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+{
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+ BUG_ON(lp->emp);
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+
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+ lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
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+ FCOE_MIN_XID, FCOE_MAX_XID);
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+ if (!lp->emp)
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+ return -ENOMEM;
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+
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+ return 0;
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+}
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+
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+/**
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+ * fcoe_if_destroy() - FCoE software HBA tear-down function
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+ * @netdev: ptr to the associated net_device
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+ *
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+ * Returns: 0 if link is OK for use by FCoE.
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+ */
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+static int fcoe_if_destroy(struct net_device *netdev)
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+{
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+ struct fc_lport *lp = NULL;
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+ struct fcoe_softc *fc;
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+ u8 flogi_maddr[ETH_ALEN];
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+
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+ BUG_ON(!netdev);
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+
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+ printk(KERN_DEBUG "fcoe_if_destroy:interface on %s\n",
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+ netdev->name);
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+
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+ lp = fcoe_hostlist_lookup(netdev);
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+ if (!lp)
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+ return -ENODEV;
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+
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+ fc = lport_priv(lp);
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+
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+ /* Logout of the fabric */
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+ fc_fabric_logoff(lp);
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+
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+ /* Remove the instance from fcoe's list */
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+ fcoe_hostlist_remove(lp);
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+
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+ /* Don't listen for Ethernet packets anymore */
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+ dev_remove_pack(&fc->fcoe_packet_type);
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+
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+ /* Cleanup the fc_lport */
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+ fc_lport_destroy(lp);
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+ fc_fcp_destroy(lp);
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+
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+ /* Detach from the scsi-ml */
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+ fc_remove_host(lp->host);
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+ scsi_remove_host(lp->host);
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+
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+ /* There are no more rports or I/O, free the EM */
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+ if (lp->emp)
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+ fc_exch_mgr_free(lp->emp);
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+
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+ /* Delete secondary MAC addresses */
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+ rtnl_lock();
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+ memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
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+ dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
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+ if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
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+ dev_unicast_delete(fc->real_dev, fc->data_src_addr, ETH_ALEN);
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+ rtnl_unlock();
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+
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+ /* Free the per-CPU revieve threads */
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+ fcoe_percpu_clean(lp);
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+
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+ /* Free existing skbs */
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+ fcoe_clean_pending_queue(lp);
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+
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+ /* Free memory used by statistical counters */
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+ fc_lport_free_stats(lp);
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+
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+ /* Release the net_device and Scsi_Host */
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+ dev_put(fc->real_dev);
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+ scsi_host_put(lp->host);
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+
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+ return 0;
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+}
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+
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+/*
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+ * fcoe_ddp_setup - calls LLD's ddp_setup through net_device
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+ * @lp: the corresponding fc_lport
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+ * @xid: the exchange id for this ddp transfer
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+ * @sgl: the scatterlist describing this transfer
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+ * @sgc: number of sg items
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+ *
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+ * Returns : 0 no ddp
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+ */
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+static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid,
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+ struct scatterlist *sgl, unsigned int sgc)
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+{
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+ struct net_device *n = fcoe_netdev(lp);
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+
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+ if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
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+ return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
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+
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+ return 0;
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+}
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+
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+/*
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+ * fcoe_ddp_done - calls LLD's ddp_done through net_device
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+ * @lp: the corresponding fc_lport
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+ * @xid: the exchange id for this ddp transfer
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+ *
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+ * Returns : the length of data that have been completed by ddp
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+ */
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+static int fcoe_ddp_done(struct fc_lport *lp, u16 xid)
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+{
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+ struct net_device *n = fcoe_netdev(lp);
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+
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+ if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
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+ return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
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+ return 0;
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+}
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+
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+static struct libfc_function_template fcoe_libfc_fcn_templ = {
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+ .frame_send = fcoe_xmit,
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+ .ddp_setup = fcoe_ddp_setup,
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+ .ddp_done = fcoe_ddp_done,
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+};
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+
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+/**
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+ * fcoe_if_create() - this function creates the fcoe interface
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+ * @netdev: pointer the associated netdevice
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|
+ *
|
|
|
+ * Creates fc_lport struct and scsi_host for lport, configures lport
|
|
|
+ * and starts fabric login.
|
|
|
+ *
|
|
|
+ * Returns : 0 on success
|
|
|
+ */
|
|
|
+static int fcoe_if_create(struct net_device *netdev)
|
|
|
+{
|
|
|
+ int rc;
|
|
|
+ struct fc_lport *lp = NULL;
|
|
|
+ struct fcoe_softc *fc;
|
|
|
+ struct Scsi_Host *shost;
|
|
|
+
|
|
|
+ BUG_ON(!netdev);
|
|
|
+
|
|
|
+ printk(KERN_DEBUG "fcoe_if_create:interface on %s\n",
|
|
|
+ netdev->name);
|
|
|
+
|
|
|
+ lp = fcoe_hostlist_lookup(netdev);
|
|
|
+ if (lp)
|
|
|
+ return -EEXIST;
|
|
|
+
|
|
|
+ shost = fcoe_host_alloc(&fcoe_shost_template,
|
|
|
+ sizeof(struct fcoe_softc));
|
|
|
+ if (!shost) {
|
|
|
+ FC_DBG("Could not allocate host structure\n");
|
|
|
+ return -ENOMEM;
|
|
|
+ }
|
|
|
+ lp = shost_priv(shost);
|
|
|
+ fc = lport_priv(lp);
|
|
|
+
|
|
|
+ /* configure fc_lport, e.g., em */
|
|
|
+ rc = fcoe_lport_config(lp);
|
|
|
+ if (rc) {
|
|
|
+ FC_DBG("Could not configure lport\n");
|
|
|
+ goto out_host_put;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* configure lport network properties */
|
|
|
+ rc = fcoe_netdev_config(lp, netdev);
|
|
|
+ if (rc) {
|
|
|
+ FC_DBG("Could not configure netdev for lport\n");
|
|
|
+ goto out_host_put;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* configure lport scsi host properties */
|
|
|
+ rc = fcoe_shost_config(lp, shost, &netdev->dev);
|
|
|
+ if (rc) {
|
|
|
+ FC_DBG("Could not configure shost for lport\n");
|
|
|
+ goto out_host_put;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* lport exch manager allocation */
|
|
|
+ rc = fcoe_em_config(lp);
|
|
|
+ if (rc) {
|
|
|
+ FC_DBG("Could not configure em for lport\n");
|
|
|
+ goto out_host_put;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Initialize the library */
|
|
|
+ rc = fcoe_libfc_config(lp, &fcoe_libfc_fcn_templ);
|
|
|
+ if (rc) {
|
|
|
+ FC_DBG("Could not configure libfc for lport!\n");
|
|
|
+ goto out_lp_destroy;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* add to lports list */
|
|
|
+ fcoe_hostlist_add(lp);
|
|
|
+
|
|
|
+ lp->boot_time = jiffies;
|
|
|
+
|
|
|
+ fc_fabric_login(lp);
|
|
|
+
|
|
|
+ dev_hold(netdev);
|
|
|
+
|
|
|
+ return rc;
|
|
|
+
|
|
|
+out_lp_destroy:
|
|
|
+ fc_exch_mgr_free(lp->emp); /* Free the EM */
|
|
|
+out_host_put:
|
|
|
+ scsi_host_put(lp->host);
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fcoe_if_init() - attach to scsi transport
|
|
|
+ *
|
|
|
+ * Returns : 0 on success
|
|
|
+ */
|
|
|
+static int __init fcoe_if_init(void)
|
|
|
+{
|
|
|
+ /* attach to scsi transport */
|
|
|
+ scsi_transport_fcoe_sw =
|
|
|
+ fc_attach_transport(&fcoe_transport_function);
|
|
|
+
|
|
|
+ if (!scsi_transport_fcoe_sw) {
|
|
|
+ printk(KERN_ERR "fcoe_init:fc_attach_transport() failed\n");
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fcoe_if_exit() - detach from scsi transport
|
|
|
+ *
|
|
|
+ * Returns : 0 on success
|
|
|
+ */
|
|
|
+int __exit fcoe_if_exit(void)
|
|
|
+{
|
|
|
+ fc_release_transport(scsi_transport_fcoe_sw);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
/**
|
|
|
* fcoe_percpu_thread_create() - Create a receive thread for an online cpu
|
|
|
* @cpu: cpu index for the online cpu
|
|
|
@@ -1080,9 +1565,9 @@ static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
|
|
|
rc = -ENODEV;
|
|
|
goto out_putdev;
|
|
|
}
|
|
|
- rc = fcoe_sw_destroy(netdev);
|
|
|
+ rc = fcoe_if_destroy(netdev);
|
|
|
if (rc) {
|
|
|
- printk(KERN_ERR "fcoe: fcoe_sw_destroy(%s) failed\n",
|
|
|
+ printk(KERN_ERR "fcoe: fcoe_if_destroy(%s) failed\n",
|
|
|
netdev->name);
|
|
|
rc = -EIO;
|
|
|
goto out_putdev;
|
|
|
@@ -1119,9 +1604,9 @@ static int fcoe_create(const char *buffer, struct kernel_param *kp)
|
|
|
}
|
|
|
fcoe_ethdrv_get(netdev);
|
|
|
|
|
|
- rc = fcoe_sw_create(netdev);
|
|
|
+ rc = fcoe_if_create(netdev);
|
|
|
if (rc) {
|
|
|
- printk(KERN_ERR "fcoe: fcoe_sw_create(%s) failed\n",
|
|
|
+ printk(KERN_ERR "fcoe: fcoe_if_create(%s) failed\n",
|
|
|
netdev->name);
|
|
|
fcoe_ethdrv_put(netdev);
|
|
|
rc = -EIO;
|
|
|
@@ -1457,7 +1942,7 @@ static int __init fcoe_init(void)
|
|
|
|
|
|
mod_timer(&fcoe_timer, jiffies + (10 * HZ));
|
|
|
|
|
|
- fcoe_sw_init();
|
|
|
+ fcoe_if_init();
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
@@ -1487,7 +1972,7 @@ static void __exit fcoe_exit(void)
|
|
|
|
|
|
/* releases the associated fcoe hosts */
|
|
|
list_for_each_entry_safe(fc, tmp, &fcoe_hostlist, list)
|
|
|
- fcoe_sw_destroy(fc->real_dev);
|
|
|
+ fcoe_if_destroy(fc->real_dev);
|
|
|
|
|
|
unregister_hotcpu_notifier(&fcoe_cpu_notifier);
|
|
|
|
|
|
@@ -1495,7 +1980,7 @@ static void __exit fcoe_exit(void)
|
|
|
fcoe_percpu_thread_destroy(cpu);
|
|
|
}
|
|
|
|
|
|
- /* remove sw trasnport */
|
|
|
- fcoe_sw_exit();
|
|
|
+ /* detach from scsi transport */
|
|
|
+ fcoe_if_exit();
|
|
|
}
|
|
|
module_exit(fcoe_exit);
|
Vasu Dev