1 files changed, 493 insertions, 8 deletions

diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 334db95f36af..a81a8ec3908e 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -56,6 +56,18 @@ static int debug_fcoe;
 
 #define FCOE_WORD_TO_BYTE  4
 
+#define FCOE_VERSION    "0.1"
+#define FCOE_NAME       "fcoe"
+#define FCOE_VENDOR     "Open-FCoE.org"
+
+#define FCOE_MAX_LUN            255
+#define FCOE_MAX_FCP_TARGET     256
+
+#define FCOE_MAX_OUTSTANDING_COMMANDS   1024
+
+#define FCOE_MIN_XID            0x0001  /* the min xid supported by fcoe_sw */
+#define FCOE_MAX_XID            0x07ef  /* the max xid supported by fcoe_sw */
+
 MODULE_AUTHOR("Open-FCoE.org");
 MODULE_DESCRIPTION("FCoE");
 MODULE_LICENSE("GPL");
@@ -79,6 +91,479 @@ static struct notifier_block fcoe_notifier = {
         .notifier_call = fcoe_device_notification,
 };
 
+static struct scsi_transport_template *scsi_transport_fcoe_sw;
+
+struct fc_function_template fcoe_transport_function = {
+        .show_host_node_name = 1,
+        .show_host_port_name = 1,
+        .show_host_supported_classes = 1,
+        .show_host_supported_fc4s = 1,
+        .show_host_active_fc4s = 1,
+        .show_host_maxframe_size = 1,
+
+        .show_host_port_id = 1,
+        .show_host_supported_speeds = 1,
+        .get_host_speed = fc_get_host_speed,
+        .show_host_speed = 1,
+        .show_host_port_type = 1,
+        .get_host_port_state = fc_get_host_port_state,
+        .show_host_port_state = 1,
+        .show_host_symbolic_name = 1,
+
+        .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
+        .show_rport_maxframe_size = 1,
+        .show_rport_supported_classes = 1,
+
+        .show_host_fabric_name = 1,
+        .show_starget_node_name = 1,
+        .show_starget_port_name = 1,
+        .show_starget_port_id = 1,
+        .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
+        .show_rport_dev_loss_tmo = 1,
+        .get_fc_host_stats = fc_get_host_stats,
+        .issue_fc_host_lip = fcoe_reset,
+
+        .terminate_rport_io = fc_rport_terminate_io,
+};
+
+static struct scsi_host_template fcoe_shost_template = {
+        .module = THIS_MODULE,
+        .name = "FCoE Driver",
+        .proc_name = FCOE_NAME,
+        .queuecommand = fc_queuecommand,
+        .eh_abort_handler = fc_eh_abort,
+        .eh_device_reset_handler = fc_eh_device_reset,
+        .eh_host_reset_handler = fc_eh_host_reset,
+        .slave_alloc = fc_slave_alloc,
+        .change_queue_depth = fc_change_queue_depth,
+        .change_queue_type = fc_change_queue_type,
+        .this_id = -1,
+        .cmd_per_lun = 32,
+        .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
+        .use_clustering = ENABLE_CLUSTERING,
+        .sg_tablesize = SG_ALL,
+        .max_sectors = 0xffff,
+};
+
+/**
+ * fcoe_lport_config() - sets up the fc_lport
+ * @lp: ptr to the fc_lport
+ * @shost: ptr to the parent scsi host
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_lport_config(struct fc_lport *lp)
+{
+        lp->link_up = 0;
+        lp->qfull = 0;
+        lp->max_retry_count = 3;
+        lp->e_d_tov = 2 * 1000; /* FC-FS default */
+        lp->r_a_tov = 2 * 2 * 1000;
+        lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
+                              FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
+
+        fc_lport_init_stats(lp);
+
+        /* lport fc_lport related configuration */
+        fc_lport_config(lp);
+
+        /* offload related configuration */
+        lp->crc_offload = 0;
+        lp->seq_offload = 0;
+        lp->lro_enabled = 0;
+        lp->lro_xid = 0;
+        lp->lso_max = 0;
+
+        return 0;
+}
+
+/**
+ * fcoe_netdev_config() - Set up netdev for SW FCoE
+ * @lp : ptr to the fc_lport
+ * @netdev : ptr to the associated netdevice struct
+ *
+ * Must be called after fcoe_lport_config() as it will use lport mutex
+ *
+ * Returns : 0 for success
+ */
+static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
+{
+        u32 mfs;
+        u64 wwnn, wwpn;
+        struct fcoe_softc *fc;
+        u8 flogi_maddr[ETH_ALEN];
+
+        /* Setup lport private data to point to fcoe softc */
+        fc = lport_priv(lp);
+        fc->lp = lp;
+        fc->real_dev = netdev;
+        fc->phys_dev = netdev;
+
+        /* Require support for get_pauseparam ethtool op. */
+        if (netdev->priv_flags & IFF_802_1Q_VLAN)
+                fc->phys_dev = vlan_dev_real_dev(netdev);
+
+        /* Do not support for bonding device */
+        if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
+            (fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
+            (fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
+                return -EOPNOTSUPP;
+        }
+
+        /*
+         * Determine max frame size based on underlying device and optional
+         * user-configured limit.  If the MFS is too low, fcoe_link_ok()
+         * will return 0, so do this first.
+         */
+        mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
+                                   sizeof(struct fcoe_crc_eof));
+        if (fc_set_mfs(lp, mfs))
+                return -EINVAL;
+
+        if (!fcoe_link_ok(lp))
+                lp->link_up = 1;
+
+        /* offload features support */
+        if (fc->real_dev->features & NETIF_F_SG)
+                lp->sg_supp = 1;
+
+#ifdef NETIF_F_FCOE_CRC
+        if (netdev->features & NETIF_F_FCOE_CRC) {
+                lp->crc_offload = 1;
+                printk(KERN_DEBUG "fcoe:%s supports FCCRC offload\n",
+                       netdev->name);
+        }
+#endif
+#ifdef NETIF_F_FSO
+        if (netdev->features & NETIF_F_FSO) {
+                lp->seq_offload = 1;
+                lp->lso_max = netdev->gso_max_size;
+                printk(KERN_DEBUG "fcoe:%s supports LSO for max len 0x%x\n",
+                       netdev->name, lp->lso_max);
+        }
+#endif
+        if (netdev->fcoe_ddp_xid) {
+                lp->lro_enabled = 1;
+                lp->lro_xid = netdev->fcoe_ddp_xid;
+                printk(KERN_DEBUG "fcoe:%s supports LRO for max xid 0x%x\n",
+                       netdev->name, lp->lro_xid);
+        }
+        skb_queue_head_init(&fc->fcoe_pending_queue);
+        fc->fcoe_pending_queue_active = 0;
+
+        /* setup Source Mac Address */
+        memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr,
+               fc->real_dev->addr_len);
+
+        wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
+        fc_set_wwnn(lp, wwnn);
+        /* XXX - 3rd arg needs to be vlan id */
+        wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
+        fc_set_wwpn(lp, wwpn);
+
+        /*
+         * Add FCoE MAC address as second unicast MAC address
+         * or enter promiscuous mode if not capable of listening
+         * for multiple unicast MACs.
+         */
+        rtnl_lock();
+        memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+        dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
+        rtnl_unlock();
+
+        /*
+         * setup the receive function from ethernet driver
+         * on the ethertype for the given device
+         */
+        fc->fcoe_packet_type.func = fcoe_rcv;
+        fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
+        fc->fcoe_packet_type.dev = fc->real_dev;
+        dev_add_pack(&fc->fcoe_packet_type);
+
+        return 0;
+}
+
+/**
+ * fcoe_shost_config() - Sets up fc_lport->host
+ * @lp : ptr to the fc_lport
+ * @shost : ptr to the associated scsi host
+ * @dev : device associated to scsi host
+ *
+ * Must be called after fcoe_lport_config() and fcoe_netdev_config()
+ *
+ * Returns : 0 for success
+ */
+static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
+                                struct device *dev)
+{
+        int rc = 0;
+
+        /* lport scsi host config */
+        lp->host = shost;
+
+        lp->host->max_lun = FCOE_MAX_LUN;
+        lp->host->max_id = FCOE_MAX_FCP_TARGET;
+        lp->host->max_channel = 0;
+        lp->host->transportt = scsi_transport_fcoe_sw;
+
+        /* add the new host to the SCSI-ml */
+        rc = scsi_add_host(lp->host, dev);
+        if (rc) {
+                FC_DBG("fcoe_shost_config:error on scsi_add_host\n");
+                return rc;
+        }
+        sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
+                FCOE_NAME, FCOE_VERSION,
+                fcoe_netdev(lp)->name);
+
+        return 0;
+}
+
+/**
+ * fcoe_em_config() - allocates em for this lport
+ * @lp: the port that em is to allocated for
+ *
+ * Returns : 0 on success
+ */
+static inline int fcoe_em_config(struct fc_lport *lp)
+{
+        BUG_ON(lp->emp);
+
+        lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
+                                    FCOE_MIN_XID, FCOE_MAX_XID);
+        if (!lp->emp)
+                return -ENOMEM;
+
+        return 0;
+}
+
+/**
+ * fcoe_if_destroy() - FCoE software HBA tear-down function
+ * @netdev: ptr to the associated net_device
+ *
+ * Returns: 0 if link is OK for use by FCoE.
+ */
+static int fcoe_if_destroy(struct net_device *netdev)
+{
+        struct fc_lport *lp = NULL;
+        struct fcoe_softc *fc;
+        u8 flogi_maddr[ETH_ALEN];
+
+        BUG_ON(!netdev);
+
+        printk(KERN_DEBUG "fcoe_if_destroy:interface on %s\n",
+               netdev->name);
+
+        lp = fcoe_hostlist_lookup(netdev);
+        if (!lp)
+                return -ENODEV;
+
+        fc = lport_priv(lp);
+
+        /* Logout of the fabric */
+        fc_fabric_logoff(lp);
+
+        /* Remove the instance from fcoe's list */
+        fcoe_hostlist_remove(lp);
+
+        /* Don't listen for Ethernet packets anymore */
+        dev_remove_pack(&fc->fcoe_packet_type);
+
+        /* Cleanup the fc_lport */
+        fc_lport_destroy(lp);
+        fc_fcp_destroy(lp);
+
+        /* Detach from the scsi-ml */
+        fc_remove_host(lp->host);
+        scsi_remove_host(lp->host);
+
+        /* There are no more rports or I/O, free the EM */
+        if (lp->emp)
+                fc_exch_mgr_free(lp->emp);
+
+        /* Delete secondary MAC addresses */
+        rtnl_lock();
+        memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+        dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
+        if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
+                dev_unicast_delete(fc->real_dev, fc->data_src_addr, ETH_ALEN);
+        rtnl_unlock();
+
+        /* Free the per-CPU revieve threads */
+        fcoe_percpu_clean(lp);
+
+        /* Free existing skbs */
+        fcoe_clean_pending_queue(lp);
+
+        /* Free memory used by statistical counters */
+        fc_lport_free_stats(lp);
+
+        /* Release the net_device and Scsi_Host */
+        dev_put(fc->real_dev);
+        scsi_host_put(lp->host);
+
+        return 0;
+}
+
+/*
+ * fcoe_ddp_setup - calls LLD's ddp_setup through net_device
+ * @lp: the corresponding fc_lport
+ * @xid: the exchange id for this ddp transfer
+ * @sgl: the scatterlist describing this transfer
+ * @sgc: number of sg items
+ *
+ * Returns : 0 no ddp
+ */
+static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid,
+                             struct scatterlist *sgl, unsigned int sgc)
+{
+        struct net_device *n = fcoe_netdev(lp);
+
+        if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
+                return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
+
+        return 0;
+}
+
+/*
+ * fcoe_ddp_done - calls LLD's ddp_done through net_device
+ * @lp: the corresponding fc_lport
+ * @xid: the exchange id for this ddp transfer
+ *
+ * Returns : the length of data that have been completed by ddp
+ */
+static int fcoe_ddp_done(struct fc_lport *lp, u16 xid)
+{
+        struct net_device *n = fcoe_netdev(lp);
+
+        if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
+                return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
+        return 0;
+}
+
+static struct libfc_function_template fcoe_libfc_fcn_templ = {
+        .frame_send = fcoe_xmit,
+        .ddp_setup = fcoe_ddp_setup,
+        .ddp_done = fcoe_ddp_done,
+};
+
+/**
+ * fcoe_if_create() - this function creates the fcoe interface
+ * @netdev: pointer the associated netdevice
+ *
+ * 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);