2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
20 #include <linux/module.h>
21 #include <linux/version.h>
22 #include <linux/spinlock.h>
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/crc32.h>
29 #include <linux/slab.h>
30 #include <linux/cpu.h>
32 #include <linux/sysfs.h>
33 #include <linux/ctype.h>
34 #include <linux/workqueue.h>
35 #include <scsi/scsi_tcq.h>
36 #include <scsi/scsicam.h>
37 #include <scsi/scsi_transport.h>
38 #include <scsi/scsi_transport_fc.h>
39 #include <net/rtnetlink.h>
41 #include <scsi/fc/fc_encaps.h>
42 #include <scsi/fc/fc_fip.h>
44 #include <scsi/libfc.h>
45 #include <scsi/fc_frame.h>
46 #include <scsi/libfcoe.h>
50 MODULE_AUTHOR("Open-FCoE.org");
51 MODULE_DESCRIPTION("FCoE");
52 MODULE_LICENSE("GPL v2");
54 /* Performance tuning parameters for fcoe */
55 static unsigned int fcoe_ddp_min;
56 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
57 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
58 "Direct Data Placement (DDP).");
60 DEFINE_MUTEX(fcoe_config_mutex);
62 static struct workqueue_struct *fcoe_wq;
64 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
65 static DECLARE_COMPLETION(fcoe_flush_completion);
68 /* must only by accessed under the RTNL mutex */
69 LIST_HEAD(fcoe_hostlist);
70 DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
72 /* Function Prototypes */
73 static int fcoe_reset(struct Scsi_Host *);
74 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
75 static int fcoe_rcv(struct sk_buff *, struct net_device *,
76 struct packet_type *, struct net_device *);
77 static int fcoe_percpu_receive_thread(void *);
78 static void fcoe_percpu_clean(struct fc_lport *);
79 static int fcoe_link_speed_update(struct fc_lport *);
80 static int fcoe_link_ok(struct fc_lport *);
82 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
83 static int fcoe_hostlist_add(const struct fc_lport *);
85 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
86 static void fcoe_dev_setup(void);
87 static void fcoe_dev_cleanup(void);
88 static struct fcoe_interface
89 *fcoe_hostlist_lookup_port(const struct net_device *);
91 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
92 struct packet_type *, struct net_device *);
94 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
95 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
96 static u8 *fcoe_get_src_mac(struct fc_lport *);
97 static void fcoe_destroy_work(struct work_struct *);
99 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
101 static int fcoe_ddp_done(struct fc_lport *, u16);
102 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
104 static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
106 static bool fcoe_match(struct net_device *netdev);
107 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode);
108 static int fcoe_destroy(struct net_device *netdev);
109 static int fcoe_enable(struct net_device *netdev);
110 static int fcoe_disable(struct net_device *netdev);
112 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
113 u32 did, struct fc_frame *,
115 void (*resp)(struct fc_seq *,
118 void *, u32 timeout);
119 static void fcoe_recv_frame(struct sk_buff *skb);
121 static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
123 /* notification function for packets from net device */
124 static struct notifier_block fcoe_notifier = {
125 .notifier_call = fcoe_device_notification,
128 /* notification function for CPU hotplug events */
129 static struct notifier_block fcoe_cpu_notifier = {
130 .notifier_call = fcoe_cpu_callback,
133 static struct scsi_transport_template *fcoe_nport_scsi_transport;
134 static struct scsi_transport_template *fcoe_vport_scsi_transport;
136 static int fcoe_vport_destroy(struct fc_vport *);
137 static int fcoe_vport_create(struct fc_vport *, bool disabled);
138 static int fcoe_vport_disable(struct fc_vport *, bool disable);
139 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
140 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
142 static struct libfc_function_template fcoe_libfc_fcn_templ = {
143 .frame_send = fcoe_xmit,
144 .ddp_setup = fcoe_ddp_setup,
145 .ddp_done = fcoe_ddp_done,
146 .ddp_target = fcoe_ddp_target,
147 .elsct_send = fcoe_elsct_send,
148 .get_lesb = fcoe_get_lesb,
149 .lport_set_port_id = fcoe_set_port_id,
152 struct fc_function_template fcoe_nport_fc_functions = {
153 .show_host_node_name = 1,
154 .show_host_port_name = 1,
155 .show_host_supported_classes = 1,
156 .show_host_supported_fc4s = 1,
157 .show_host_active_fc4s = 1,
158 .show_host_maxframe_size = 1,
160 .show_host_port_id = 1,
161 .show_host_supported_speeds = 1,
162 .get_host_speed = fc_get_host_speed,
163 .show_host_speed = 1,
164 .show_host_port_type = 1,
165 .get_host_port_state = fc_get_host_port_state,
166 .show_host_port_state = 1,
167 .show_host_symbolic_name = 1,
169 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
170 .show_rport_maxframe_size = 1,
171 .show_rport_supported_classes = 1,
173 .show_host_fabric_name = 1,
174 .show_starget_node_name = 1,
175 .show_starget_port_name = 1,
176 .show_starget_port_id = 1,
177 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
178 .show_rport_dev_loss_tmo = 1,
179 .get_fc_host_stats = fc_get_host_stats,
180 .issue_fc_host_lip = fcoe_reset,
182 .terminate_rport_io = fc_rport_terminate_io,
184 .vport_create = fcoe_vport_create,
185 .vport_delete = fcoe_vport_destroy,
186 .vport_disable = fcoe_vport_disable,
187 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
189 .bsg_request = fc_lport_bsg_request,
192 struct fc_function_template fcoe_vport_fc_functions = {
193 .show_host_node_name = 1,
194 .show_host_port_name = 1,
195 .show_host_supported_classes = 1,
196 .show_host_supported_fc4s = 1,
197 .show_host_active_fc4s = 1,
198 .show_host_maxframe_size = 1,
200 .show_host_port_id = 1,
201 .show_host_supported_speeds = 1,
202 .get_host_speed = fc_get_host_speed,
203 .show_host_speed = 1,
204 .show_host_port_type = 1,
205 .get_host_port_state = fc_get_host_port_state,
206 .show_host_port_state = 1,
207 .show_host_symbolic_name = 1,
209 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
210 .show_rport_maxframe_size = 1,
211 .show_rport_supported_classes = 1,
213 .show_host_fabric_name = 1,
214 .show_starget_node_name = 1,
215 .show_starget_port_name = 1,
216 .show_starget_port_id = 1,
217 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
218 .show_rport_dev_loss_tmo = 1,
219 .get_fc_host_stats = fc_get_host_stats,
220 .issue_fc_host_lip = fcoe_reset,
222 .terminate_rport_io = fc_rport_terminate_io,
224 .bsg_request = fc_lport_bsg_request,
227 static struct scsi_host_template fcoe_shost_template = {
228 .module = THIS_MODULE,
229 .name = "FCoE Driver",
230 .proc_name = FCOE_NAME,
231 .queuecommand = fc_queuecommand,
232 .eh_abort_handler = fc_eh_abort,
233 .eh_device_reset_handler = fc_eh_device_reset,
234 .eh_host_reset_handler = fc_eh_host_reset,
235 .slave_alloc = fc_slave_alloc,
236 .change_queue_depth = fc_change_queue_depth,
237 .change_queue_type = fc_change_queue_type,
240 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
241 .use_clustering = ENABLE_CLUSTERING,
242 .sg_tablesize = SG_ALL,
243 .max_sectors = 0xffff,
247 * fcoe_interface_setup() - Setup a FCoE interface
248 * @fcoe: The new FCoE interface
249 * @netdev: The net device that the fcoe interface is on
251 * Returns : 0 for success
252 * Locking: must be called with the RTNL mutex held
254 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
255 struct net_device *netdev)
257 struct fcoe_ctlr *fip = &fcoe->ctlr;
258 struct netdev_hw_addr *ha;
259 struct net_device *real_dev;
260 u8 flogi_maddr[ETH_ALEN];
261 const struct net_device_ops *ops;
263 fcoe->netdev = netdev;
265 /* Let LLD initialize for FCoE */
266 ops = netdev->netdev_ops;
267 if (ops->ndo_fcoe_enable) {
268 if (ops->ndo_fcoe_enable(netdev))
269 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
270 " specific feature for LLD.\n");
273 /* Do not support for bonding device */
274 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
275 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
279 /* look for SAN MAC address, if multiple SAN MACs exist, only
280 * use the first one for SPMA */
281 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
282 vlan_dev_real_dev(netdev) : netdev;
284 for_each_dev_addr(real_dev, ha) {
285 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
286 (is_valid_ether_addr(ha->addr))) {
287 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
294 /* setup Source Mac Address */
296 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
299 * Add FCoE MAC address as second unicast MAC address
300 * or enter promiscuous mode if not capable of listening
301 * for multiple unicast MACs.
303 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
304 dev_uc_add(netdev, flogi_maddr);
306 dev_uc_add(netdev, fip->ctl_src_addr);
307 if (fip->mode == FIP_MODE_VN2VN) {
308 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
309 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
311 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
314 * setup the receive function from ethernet driver
315 * on the ethertype for the given device
317 fcoe->fcoe_packet_type.func = fcoe_rcv;
318 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
319 fcoe->fcoe_packet_type.dev = netdev;
320 dev_add_pack(&fcoe->fcoe_packet_type);
322 fcoe->fip_packet_type.func = fcoe_fip_recv;
323 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
324 fcoe->fip_packet_type.dev = netdev;
325 dev_add_pack(&fcoe->fip_packet_type);
331 * fcoe_interface_create() - Create a FCoE interface on a net device
332 * @netdev: The net device to create the FCoE interface on
333 * @fip_mode: The mode to use for FIP
335 * Returns: pointer to a struct fcoe_interface or NULL on error
337 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
338 enum fip_state fip_mode)
340 struct fcoe_interface *fcoe;
343 if (!try_module_get(THIS_MODULE)) {
344 FCOE_NETDEV_DBG(netdev,
345 "Could not get a reference to the module\n");
346 fcoe = ERR_PTR(-EBUSY);
350 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
352 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
353 fcoe = ERR_PTR(-ENOMEM);
358 kref_init(&fcoe->kref);
363 fcoe_ctlr_init(&fcoe->ctlr, fip_mode);
364 fcoe->ctlr.send = fcoe_fip_send;
365 fcoe->ctlr.update_mac = fcoe_update_src_mac;
366 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
368 err = fcoe_interface_setup(fcoe, netdev);
370 fcoe_ctlr_destroy(&fcoe->ctlr);
380 module_put(THIS_MODULE);
386 * fcoe_interface_release() - fcoe_port kref release function
387 * @kref: Embedded reference count in an fcoe_interface struct
389 static void fcoe_interface_release(struct kref *kref)
391 struct fcoe_interface *fcoe;
392 struct net_device *netdev;
394 fcoe = container_of(kref, struct fcoe_interface, kref);
395 netdev = fcoe->netdev;
396 /* tear-down the FCoE controller */
397 fcoe_ctlr_destroy(&fcoe->ctlr);
400 module_put(THIS_MODULE);
404 * fcoe_interface_get() - Get a reference to a FCoE interface
405 * @fcoe: The FCoE interface to be held
407 static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
409 kref_get(&fcoe->kref);
413 * fcoe_interface_put() - Put a reference to a FCoE interface
414 * @fcoe: The FCoE interface to be released
416 static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
418 kref_put(&fcoe->kref, fcoe_interface_release);
422 * fcoe_interface_cleanup() - Clean up a FCoE interface
423 * @fcoe: The FCoE interface to be cleaned up
425 * Caller must be holding the RTNL mutex
427 void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
429 struct net_device *netdev = fcoe->netdev;
430 struct fcoe_ctlr *fip = &fcoe->ctlr;
431 u8 flogi_maddr[ETH_ALEN];
432 const struct net_device_ops *ops;
435 * Don't listen for Ethernet packets anymore.
436 * synchronize_net() ensures that the packet handlers are not running
437 * on another CPU. dev_remove_pack() would do that, this calls the
438 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
440 __dev_remove_pack(&fcoe->fcoe_packet_type);
441 __dev_remove_pack(&fcoe->fip_packet_type);
444 /* Delete secondary MAC addresses */
445 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
446 dev_uc_del(netdev, flogi_maddr);
448 dev_uc_del(netdev, fip->ctl_src_addr);
449 if (fip->mode == FIP_MODE_VN2VN) {
450 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
451 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
453 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
455 /* Tell the LLD we are done w/ FCoE */
456 ops = netdev->netdev_ops;
457 if (ops->ndo_fcoe_disable) {
458 if (ops->ndo_fcoe_disable(netdev))
459 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
460 " specific feature for LLD.\n");
463 /* Release the self-reference taken during fcoe_interface_create() */
464 fcoe_interface_put(fcoe);
468 * fcoe_fip_recv() - Handler for received FIP frames
469 * @skb: The receive skb
470 * @netdev: The associated net device
471 * @ptype: The packet_type structure which was used to register this handler
472 * @orig_dev: The original net_device the the skb was received on.
473 * (in case dev is a bond)
475 * Returns: 0 for success
477 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
478 struct packet_type *ptype,
479 struct net_device *orig_dev)
481 struct fcoe_interface *fcoe;
483 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
484 fcoe_ctlr_recv(&fcoe->ctlr, skb);
489 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
490 * @port: The FCoE port
491 * @skb: The FIP/FCoE packet to be sent
493 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
495 if (port->fcoe_pending_queue.qlen)
496 fcoe_check_wait_queue(port->lport, skb);
497 else if (fcoe_start_io(skb))
498 fcoe_check_wait_queue(port->lport, skb);
502 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
503 * @fip: The FCoE controller
504 * @skb: The FIP packet to be sent
506 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
508 skb->dev = fcoe_from_ctlr(fip)->netdev;
509 fcoe_port_send(lport_priv(fip->lp), skb);
513 * fcoe_update_src_mac() - Update the Ethernet MAC filters
514 * @lport: The local port to update the source MAC on
515 * @addr: Unicast MAC address to add
517 * Remove any previously-set unicast MAC filter.
518 * Add secondary FCoE MAC address filter for our OUI.
520 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
522 struct fcoe_port *port = lport_priv(lport);
523 struct fcoe_interface *fcoe = port->priv;
526 if (!is_zero_ether_addr(port->data_src_addr))
527 dev_uc_del(fcoe->netdev, port->data_src_addr);
528 if (!is_zero_ether_addr(addr))
529 dev_uc_add(fcoe->netdev, addr);
530 memcpy(port->data_src_addr, addr, ETH_ALEN);
535 * fcoe_get_src_mac() - return the Ethernet source address for an lport
536 * @lport: libfc lport
538 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
540 struct fcoe_port *port = lport_priv(lport);
542 return port->data_src_addr;
546 * fcoe_lport_config() - Set up a local port
547 * @lport: The local port to be setup
549 * Returns: 0 for success
551 static int fcoe_lport_config(struct fc_lport *lport)
555 lport->max_retry_count = 3;
556 lport->max_rport_retry_count = 3;
557 lport->e_d_tov = 2 * 1000; /* FC-FS default */
558 lport->r_a_tov = 2 * 2 * 1000;
559 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
560 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
561 lport->does_npiv = 1;
563 fc_lport_init_stats(lport);
565 /* lport fc_lport related configuration */
566 fc_lport_config(lport);
568 /* offload related configuration */
569 lport->crc_offload = 0;
570 lport->seq_offload = 0;
571 lport->lro_enabled = 0;
579 * fcoe_netdev_features_change - Updates the lport's offload flags based
580 * on the LLD netdev's FCoE feature flags
582 static void fcoe_netdev_features_change(struct fc_lport *lport,
583 struct net_device *netdev)
585 mutex_lock(&lport->lp_mutex);
587 if (netdev->features & NETIF_F_SG)
592 if (netdev->features & NETIF_F_FCOE_CRC) {
593 lport->crc_offload = 1;
594 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
596 lport->crc_offload = 0;
599 if (netdev->features & NETIF_F_FSO) {
600 lport->seq_offload = 1;
601 lport->lso_max = netdev->gso_max_size;
602 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
605 lport->seq_offload = 0;
609 if (netdev->fcoe_ddp_xid) {
610 lport->lro_enabled = 1;
611 lport->lro_xid = netdev->fcoe_ddp_xid;
612 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
615 lport->lro_enabled = 0;
619 mutex_unlock(&lport->lp_mutex);
623 * fcoe_netdev_config() - Set up net devive for SW FCoE
624 * @lport: The local port that is associated with the net device
625 * @netdev: The associated net device
627 * Must be called after fcoe_lport_config() as it will use local port mutex
629 * Returns: 0 for success
631 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
635 struct fcoe_interface *fcoe;
636 struct fcoe_port *port;
638 /* Setup lport private data to point to fcoe softc */
639 port = lport_priv(lport);
643 * Determine max frame size based on underlying device and optional
644 * user-configured limit. If the MFS is too low, fcoe_link_ok()
645 * will return 0, so do this first.
648 if (netdev->features & NETIF_F_FCOE_MTU) {
650 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
652 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
653 if (fc_set_mfs(lport, mfs))
656 /* offload features support */
657 fcoe_netdev_features_change(lport, netdev);
659 skb_queue_head_init(&port->fcoe_pending_queue);
660 port->fcoe_pending_queue_active = 0;
661 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
663 fcoe_link_speed_update(lport);
666 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
667 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
668 fc_set_wwnn(lport, wwnn);
669 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
670 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr,
672 fc_set_wwpn(lport, wwpn);
679 * fcoe_shost_config() - Set up the SCSI host associated with a local port
680 * @lport: The local port
681 * @dev: The device associated with the SCSI host
683 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
685 * Returns: 0 for success
687 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
691 /* lport scsi host config */
692 lport->host->max_lun = FCOE_MAX_LUN;
693 lport->host->max_id = FCOE_MAX_FCP_TARGET;
694 lport->host->max_channel = 0;
695 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
698 lport->host->transportt = fcoe_vport_scsi_transport;
700 lport->host->transportt = fcoe_nport_scsi_transport;
702 /* add the new host to the SCSI-ml */
703 rc = scsi_add_host(lport->host, dev);
705 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
706 "error on scsi_add_host\n");
711 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
713 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
714 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
715 fcoe_netdev(lport)->name);
721 * fcoe_oem_match() - The match routine for the offloaded exchange manager
724 * This routine will be associated with an exchange manager (EM). When
725 * the libfc exchange handling code is looking for an EM to use it will
726 * call this routine and pass it the frame that it wishes to send. This
727 * routine will return True if the associated EM is to be used and False
728 * if the echange code should continue looking for an EM.
730 * The offload EM that this routine is associated with will handle any
731 * packets that are for SCSI read requests.
733 * This has been enhanced to work when FCoE stack is operating in target
736 * Returns: True for read types I/O, otherwise returns false.
738 bool fcoe_oem_match(struct fc_frame *fp)
740 struct fc_frame_header *fh = fc_frame_header_get(fp);
741 struct fcp_cmnd *fcp;
743 if (fc_fcp_is_read(fr_fsp(fp)) &&
744 (fr_fsp(fp)->data_len > fcoe_ddp_min))
746 else if (!(ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)) {
747 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
748 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN &&
749 fcp && (ntohl(fcp->fc_dl) > fcoe_ddp_min) &&
750 (fcp->fc_flags & FCP_CFL_WRDATA))
757 * fcoe_em_config() - Allocate and configure an exchange manager
758 * @lport: The local port that the new EM will be associated with
760 * Returns: 0 on success
762 static inline int fcoe_em_config(struct fc_lport *lport)
764 struct fcoe_port *port = lport_priv(lport);
765 struct fcoe_interface *fcoe = port->priv;
766 struct fcoe_interface *oldfcoe = NULL;
767 struct net_device *old_real_dev, *cur_real_dev;
768 u16 min_xid = FCOE_MIN_XID;
769 u16 max_xid = FCOE_MAX_XID;
772 * Check if need to allocate an em instance for
773 * offload exchange ids to be shared across all VN_PORTs/lport.
775 if (!lport->lro_enabled || !lport->lro_xid ||
776 (lport->lro_xid >= max_xid)) {
782 * Reuse existing offload em instance in case
783 * it is already allocated on real eth device
785 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
786 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
788 cur_real_dev = fcoe->netdev;
790 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
791 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
792 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
794 old_real_dev = oldfcoe->netdev;
796 if (cur_real_dev == old_real_dev) {
797 fcoe->oem = oldfcoe->oem;
803 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
804 printk(KERN_ERR "fcoe_em_config: failed to add "
805 "offload em:%p on interface:%s\n",
806 fcoe->oem, fcoe->netdev->name);
810 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
811 FCOE_MIN_XID, lport->lro_xid,
814 printk(KERN_ERR "fcoe_em_config: failed to allocate "
815 "em for offload exches on interface:%s\n",
822 * Exclude offload EM xid range from next EM xid range.
824 min_xid += lport->lro_xid + 1;
827 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
828 printk(KERN_ERR "fcoe_em_config: failed to "
829 "allocate em on interface %s\n", fcoe->netdev->name);
837 * fcoe_if_destroy() - Tear down a SW FCoE instance
838 * @lport: The local port to be destroyed
841 static void fcoe_if_destroy(struct fc_lport *lport)
843 struct fcoe_port *port = lport_priv(lport);
844 struct fcoe_interface *fcoe = port->priv;
845 struct net_device *netdev = fcoe->netdev;
847 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
849 /* Logout of the fabric */
850 fc_fabric_logoff(lport);
852 /* Cleanup the fc_lport */
853 fc_lport_destroy(lport);
855 /* Stop the transmit retry timer */
856 del_timer_sync(&port->timer);
858 /* Free existing transmit skbs */
859 fcoe_clean_pending_queue(lport);
862 if (!is_zero_ether_addr(port->data_src_addr))
863 dev_uc_del(netdev, port->data_src_addr);
866 /* Release reference held in fcoe_if_create() */
867 fcoe_interface_put(fcoe);
869 /* Free queued packets for the per-CPU receive threads */
870 fcoe_percpu_clean(lport);
872 /* Detach from the scsi-ml */
873 fc_remove_host(lport->host);
874 scsi_remove_host(lport->host);
876 /* Destroy lport scsi_priv */
877 fc_fcp_destroy(lport);
879 /* There are no more rports or I/O, free the EM */
880 fc_exch_mgr_free(lport);
882 /* Free memory used by statistical counters */
883 fc_lport_free_stats(lport);
885 /* Release the Scsi_Host */
886 scsi_host_put(lport->host);
890 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
891 * @lport: The local port to setup DDP for
892 * @xid: The exchange ID for this DDP transfer
893 * @sgl: The scatterlist describing this transfer
894 * @sgc: The number of sg items
896 * Returns: 0 if the DDP context was not configured
898 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
899 struct scatterlist *sgl, unsigned int sgc)
901 struct net_device *netdev = fcoe_netdev(lport);
903 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
904 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
912 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
913 * @lport: The local port to setup DDP for
914 * @xid: The exchange ID for this DDP transfer
915 * @sgl: The scatterlist describing this transfer
916 * @sgc: The number of sg items
918 * Returns: 0 if the DDP context was not configured
920 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
921 struct scatterlist *sgl, unsigned int sgc)
923 struct net_device *netdev = fcoe_netdev(lport);
925 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
926 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
934 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
935 * @lport: The local port to complete DDP on
936 * @xid: The exchange ID for this DDP transfer
938 * Returns: the length of data that have been completed by DDP
940 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
942 struct net_device *netdev = fcoe_netdev(lport);
944 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
945 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
950 * fcoe_if_create() - Create a FCoE instance on an interface
951 * @fcoe: The FCoE interface to create a local port on
952 * @parent: The device pointer to be the parent in sysfs for the SCSI host
953 * @npiv: Indicates if the port is a vport or not
955 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
957 * Returns: The allocated fc_lport or an error pointer
959 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
960 struct device *parent, int npiv)
962 struct net_device *netdev = fcoe->netdev;
963 struct fc_lport *lport, *n_port;
964 struct fcoe_port *port;
965 struct Scsi_Host *shost;
968 * parent is only a vport if npiv is 1,
969 * but we'll only use vport in that case so go ahead and set it
971 struct fc_vport *vport = dev_to_vport(parent);
973 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
976 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
978 lport = libfc_vport_create(vport, sizeof(*port));
981 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
985 port = lport_priv(lport);
988 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
989 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
990 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
992 /* configure a fc_lport including the exchange manager */
993 rc = fcoe_lport_config(lport);
995 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1001 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1002 "%16.16llx %16.16llx\n",
1003 vport->node_name, vport->port_name);
1004 fc_set_wwnn(lport, vport->node_name);
1005 fc_set_wwpn(lport, vport->port_name);
1008 /* configure lport network properties */
1009 rc = fcoe_netdev_config(lport, netdev);
1011 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1013 goto out_lp_destroy;
1016 /* configure lport scsi host properties */
1017 rc = fcoe_shost_config(lport, parent);
1019 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1021 goto out_lp_destroy;
1024 /* Initialize the library */
1025 rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1);
1027 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1029 goto out_lp_destroy;
1033 * fcoe_em_alloc() and fcoe_hostlist_add() both
1034 * need to be atomic with respect to other changes to the
1035 * hostlist since fcoe_em_alloc() looks for an existing EM
1036 * instance on host list updated by fcoe_hostlist_add().
1038 * This is currently handled through the fcoe_config_mutex
1042 /* lport exch manager allocation */
1043 rc = fcoe_em_config(lport);
1045 shost = vport_to_shost(vport);
1046 n_port = shost_priv(shost);
1047 rc = fc_exch_mgr_list_clone(n_port, lport);
1051 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1052 goto out_lp_destroy;
1055 fcoe_interface_get(fcoe);
1059 fc_exch_mgr_free(lport);
1061 scsi_host_put(lport->host);
1067 * fcoe_if_init() - Initialization routine for fcoe.ko
1069 * Attaches the SW FCoE transport to the FC transport
1071 * Returns: 0 on success
1073 static int __init fcoe_if_init(void)
1075 /* attach to scsi transport */
1076 fcoe_nport_scsi_transport =
1077 fc_attach_transport(&fcoe_nport_fc_functions);
1078 fcoe_vport_scsi_transport =
1079 fc_attach_transport(&fcoe_vport_fc_functions);
1081 if (!fcoe_nport_scsi_transport) {
1082 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1090 * fcoe_if_exit() - Tear down fcoe.ko
1092 * Detaches the SW FCoE transport from the FC transport
1094 * Returns: 0 on success
1096 int __exit fcoe_if_exit(void)
1098 fc_release_transport(fcoe_nport_scsi_transport);
1099 fc_release_transport(fcoe_vport_scsi_transport);
1100 fcoe_nport_scsi_transport = NULL;
1101 fcoe_vport_scsi_transport = NULL;
1106 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1107 * @cpu: The CPU index of the CPU to create a receive thread for
1109 static void fcoe_percpu_thread_create(unsigned int cpu)
1111 struct fcoe_percpu_s *p;
1112 struct task_struct *thread;
1114 p = &per_cpu(fcoe_percpu, cpu);
1116 thread = kthread_create(fcoe_percpu_receive_thread,
1117 (void *)p, "fcoethread/%d", cpu);
1119 if (likely(!IS_ERR(thread))) {
1120 kthread_bind(thread, cpu);
1121 wake_up_process(thread);
1123 spin_lock_bh(&p->fcoe_rx_list.lock);
1125 spin_unlock_bh(&p->fcoe_rx_list.lock);
1130 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1131 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1133 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1134 * current CPU's Rx thread. If the thread being destroyed is bound to
1135 * the CPU processing this context the skbs will be freed.
1137 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1139 struct fcoe_percpu_s *p;
1140 struct task_struct *thread;
1141 struct page *crc_eof;
1142 struct sk_buff *skb;
1144 struct fcoe_percpu_s *p0;
1145 unsigned targ_cpu = get_cpu();
1146 #endif /* CONFIG_SMP */
1148 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1150 /* Prevent any new skbs from being queued for this CPU. */
1151 p = &per_cpu(fcoe_percpu, cpu);
1152 spin_lock_bh(&p->fcoe_rx_list.lock);
1155 crc_eof = p->crc_eof_page;
1156 p->crc_eof_page = NULL;
1157 p->crc_eof_offset = 0;
1158 spin_unlock_bh(&p->fcoe_rx_list.lock);
1162 * Don't bother moving the skb's if this context is running
1163 * on the same CPU that is having its thread destroyed. This
1164 * can easily happen when the module is removed.
1166 if (cpu != targ_cpu) {
1167 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1168 spin_lock_bh(&p0->fcoe_rx_list.lock);
1170 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1173 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1174 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1175 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1178 * The targeted CPU is not initialized and cannot accept
1179 * new skbs. Unlock the targeted CPU and drop the skbs
1180 * on the CPU that is going offline.
1182 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1184 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1188 * This scenario occurs when the module is being removed
1189 * and all threads are being destroyed. skbs will continue
1190 * to be shifted from the CPU thread that is being removed
1191 * to the CPU thread associated with the CPU that is processing
1192 * the module removal. Once there is only one CPU Rx thread it
1193 * will reach this case and we will drop all skbs and later
1196 spin_lock_bh(&p->fcoe_rx_list.lock);
1197 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1199 spin_unlock_bh(&p->fcoe_rx_list.lock);
1204 * This a non-SMP scenario where the singular Rx thread is
1205 * being removed. Free all skbs and stop the thread.
1207 spin_lock_bh(&p->fcoe_rx_list.lock);
1208 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1210 spin_unlock_bh(&p->fcoe_rx_list.lock);
1214 kthread_stop(thread);
1221 * fcoe_cpu_callback() - Handler for CPU hotplug events
1222 * @nfb: The callback data block
1223 * @action: The event triggering the callback
1224 * @hcpu: The index of the CPU that the event is for
1226 * This creates or destroys per-CPU data for fcoe
1228 * Returns NOTIFY_OK always.
1230 static int fcoe_cpu_callback(struct notifier_block *nfb,
1231 unsigned long action, void *hcpu)
1233 unsigned cpu = (unsigned long)hcpu;
1237 case CPU_ONLINE_FROZEN:
1238 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1239 fcoe_percpu_thread_create(cpu);
1242 case CPU_DEAD_FROZEN:
1243 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1244 fcoe_percpu_thread_destroy(cpu);
1253 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1256 * This routine selects next CPU based on cpumask to distribute
1257 * incoming requests in round robin.
1259 * Returns: int CPU number
1261 static inline unsigned int fcoe_select_cpu(void)
1263 static unsigned int selected_cpu;
1265 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1266 if (selected_cpu >= nr_cpu_ids)
1267 selected_cpu = cpumask_first(cpu_online_mask);
1269 return selected_cpu;
1273 * fcoe_rcv() - Receive packets from a net device
1274 * @skb: The received packet
1275 * @netdev: The net device that the packet was received on
1276 * @ptype: The packet type context
1277 * @olddev: The last device net device
1279 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1280 * FC frame and passes the frame to libfc.
1282 * Returns: 0 for success
1284 int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1285 struct packet_type *ptype, struct net_device *olddev)
1287 struct fc_lport *lport;
1288 struct fcoe_rcv_info *fr;
1289 struct fcoe_interface *fcoe;
1290 struct fc_frame_header *fh;
1291 struct fcoe_percpu_s *fps;
1295 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1296 lport = fcoe->ctlr.lp;
1297 if (unlikely(!lport)) {
1298 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1301 if (!lport->link_up)
1304 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1305 "data:%p tail:%p end:%p sum:%d dev:%s",
1306 skb->len, skb->data_len, skb->head, skb->data,
1307 skb_tail_pointer(skb), skb_end_pointer(skb),
1308 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1312 if (is_fip_mode(&fcoe->ctlr) &&
1313 compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) {
1314 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1320 * Check for minimum frame length, and make sure required FCoE
1321 * and FC headers are pulled into the linear data area.
1323 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1324 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1327 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1328 fh = (struct fc_frame_header *) skb_transport_header(skb);
1330 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1331 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1336 fr = fcoe_dev_from_skb(skb);
1340 * In case the incoming frame's exchange is originated from
1341 * the initiator, then received frame's exchange id is ANDed
1342 * with fc_cpu_mask bits to get the same cpu on which exchange
1343 * was originated, otherwise select cpu using rx exchange id
1344 * or fcoe_select_cpu().
1346 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1347 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1349 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1350 cpu = fcoe_select_cpu();
1352 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1355 if (cpu >= nr_cpu_ids)
1358 fps = &per_cpu(fcoe_percpu, cpu);
1359 spin_lock_bh(&fps->fcoe_rx_list.lock);
1360 if (unlikely(!fps->thread)) {
1362 * The targeted CPU is not ready, let's target
1363 * the first CPU now. For non-SMP systems this
1364 * will check the same CPU twice.
1366 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1367 "ready for incoming skb- using first online "
1370 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1371 cpu = cpumask_first(cpu_online_mask);
1372 fps = &per_cpu(fcoe_percpu, cpu);
1373 spin_lock_bh(&fps->fcoe_rx_list.lock);
1375 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1381 * We now have a valid CPU that we're targeting for
1382 * this skb. We also have this receive thread locked,
1383 * so we're free to queue skbs into it's queue.
1386 /* If this is a SCSI-FCP frame, and this is already executing on the
1387 * correct CPU, and the queue for this CPU is empty, then go ahead
1388 * and process the frame directly in the softirq context.
1389 * This lets us process completions without context switching from the
1390 * NET_RX softirq, to our receive processing thread, and then back to
1391 * BLOCK softirq context.
1393 if (fh->fh_type == FC_TYPE_FCP &&
1394 cpu == smp_processor_id() &&
1395 skb_queue_empty(&fps->fcoe_rx_list)) {
1396 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1397 fcoe_recv_frame(skb);
1399 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1400 if (fps->fcoe_rx_list.qlen == 1)
1401 wake_up_process(fps->thread);
1402 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1407 per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++;
1415 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1416 * @skb: The packet to be transmitted
1417 * @tlen: The total length of the trailer
1419 * Returns: 0 for success
1421 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1423 struct fcoe_percpu_s *fps;
1426 fps = &get_cpu_var(fcoe_percpu);
1427 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1428 put_cpu_var(fcoe_percpu);
1434 * fcoe_xmit() - Transmit a FCoE frame
1435 * @lport: The local port that the frame is to be transmitted for
1436 * @fp: The frame to be transmitted
1438 * Return: 0 for success
1440 int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1445 struct fcoe_crc_eof *cp;
1446 struct sk_buff *skb;
1447 struct fcoe_dev_stats *stats;
1448 struct fc_frame_header *fh;
1449 unsigned int hlen; /* header length implies the version */
1450 unsigned int tlen; /* trailer length */
1451 unsigned int elen; /* eth header, may include vlan */
1452 struct fcoe_port *port = lport_priv(lport);
1453 struct fcoe_interface *fcoe = port->priv;
1455 struct fcoe_hdr *hp;
1457 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1459 fh = fc_frame_header_get(fp);
1461 wlen = skb->len / FCOE_WORD_TO_BYTE;
1463 if (!lport->link_up) {
1468 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1469 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1475 elen = sizeof(struct ethhdr);
1476 hlen = sizeof(struct fcoe_hdr);
1477 tlen = sizeof(struct fcoe_crc_eof);
1478 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1481 if (likely(lport->crc_offload)) {
1482 skb->ip_summed = CHECKSUM_PARTIAL;
1483 skb->csum_start = skb_headroom(skb);
1484 skb->csum_offset = skb->len;
1487 skb->ip_summed = CHECKSUM_NONE;
1488 crc = fcoe_fc_crc(fp);
1491 /* copy port crc and eof to the skb buff */
1492 if (skb_is_nonlinear(skb)) {
1494 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1498 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1499 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1500 + frag->page_offset;
1502 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1505 memset(cp, 0, sizeof(*cp));
1507 cp->fcoe_crc32 = cpu_to_le32(~crc);
1509 if (skb_is_nonlinear(skb)) {
1510 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1514 /* adjust skb network/transport offsets to match mac/fcoe/port */
1515 skb_push(skb, elen + hlen);
1516 skb_reset_mac_header(skb);
1517 skb_reset_network_header(skb);
1518 skb->mac_len = elen;
1519 skb->protocol = htons(ETH_P_FCOE);
1520 skb->dev = fcoe->netdev;
1522 /* fill up mac and fcoe headers */
1524 eh->h_proto = htons(ETH_P_FCOE);
1525 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1526 if (fcoe->ctlr.map_dest)
1527 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1529 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1530 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1532 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1534 hp = (struct fcoe_hdr *)(eh + 1);
1535 memset(hp, 0, sizeof(*hp));
1537 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1540 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1541 if (lport->seq_offload && fr_max_payload(fp)) {
1542 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1543 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1545 skb_shinfo(skb)->gso_type = 0;
1546 skb_shinfo(skb)->gso_size = 0;
1548 /* update tx stats: regardless if LLD fails */
1549 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1551 stats->TxWords += wlen;
1554 /* send down to lld */
1556 fcoe_port_send(port, skb);
1561 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1562 * @skb: The completed skb (argument required by destructor)
1564 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1566 complete(&fcoe_flush_completion);
1570 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1571 * @lport: The local port the frame was received on
1572 * @fp: The received frame
1574 * Return: 0 on passing filtering checks
1576 static inline int fcoe_filter_frames(struct fc_lport *lport,
1577 struct fc_frame *fp)
1579 struct fcoe_interface *fcoe;
1580 struct fc_frame_header *fh;
1581 struct sk_buff *skb = (struct sk_buff *)fp;
1582 struct fcoe_dev_stats *stats;
1585 * We only check CRC if no offload is available and if it is
1586 * it's solicited data, in which case, the FCP layer would
1587 * check it during the copy.
1589 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1590 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1592 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1594 fh = (struct fc_frame_header *) skb_transport_header(skb);
1595 fh = fc_frame_header_get(fp);
1596 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1599 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1600 if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1601 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1602 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1606 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1607 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1608 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1612 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1613 stats->InvalidCRCCount++;
1614 if (stats->InvalidCRCCount < 5)
1615 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1620 * fcoe_recv_frame() - process a single received frame
1621 * @skb: frame to process
1623 static void fcoe_recv_frame(struct sk_buff *skb)
1626 struct fc_lport *lport;
1627 struct fcoe_rcv_info *fr;
1628 struct fcoe_dev_stats *stats;
1629 struct fcoe_crc_eof crc_eof;
1630 struct fc_frame *fp;
1631 struct fcoe_port *port;
1632 struct fcoe_hdr *hp;
1634 fr = fcoe_dev_from_skb(skb);
1636 if (unlikely(!lport)) {
1637 if (skb->destructor != fcoe_percpu_flush_done)
1638 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1643 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1644 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1645 skb->len, skb->data_len,
1646 skb->head, skb->data, skb_tail_pointer(skb),
1647 skb_end_pointer(skb), skb->csum,
1648 skb->dev ? skb->dev->name : "<NULL>");
1650 port = lport_priv(lport);
1651 if (skb_is_nonlinear(skb))
1652 skb_linearize(skb); /* not ideal */
1655 * Frame length checks and setting up the header pointers
1656 * was done in fcoe_rcv already.
1658 hp = (struct fcoe_hdr *) skb_network_header(skb);
1660 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1661 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1662 if (stats->ErrorFrames < 5)
1663 printk(KERN_WARNING "fcoe: FCoE version "
1664 "mismatch: The frame has "
1665 "version %x, but the "
1666 "initiator supports version "
1667 "%x\n", FC_FCOE_DECAPS_VER(hp),
1672 skb_pull(skb, sizeof(struct fcoe_hdr));
1673 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1676 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1678 fp = (struct fc_frame *)skb;
1681 fr_sof(fp) = hp->fcoe_sof;
1683 /* Copy out the CRC and EOF trailer for access */
1684 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1686 fr_eof(fp) = crc_eof.fcoe_eof;
1687 fr_crc(fp) = crc_eof.fcoe_crc32;
1688 if (pskb_trim(skb, fr_len))
1691 if (!fcoe_filter_frames(lport, fp)) {
1693 fc_exch_recv(lport, fp);
1697 stats->ErrorFrames++;
1703 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1704 * @arg: The per-CPU context
1706 * Return: 0 for success
1708 int fcoe_percpu_receive_thread(void *arg)
1710 struct fcoe_percpu_s *p = arg;
1711 struct sk_buff *skb;
1713 set_user_nice(current, -20);
1715 while (!kthread_should_stop()) {
1717 spin_lock_bh(&p->fcoe_rx_list.lock);
1718 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1719 set_current_state(TASK_INTERRUPTIBLE);
1720 spin_unlock_bh(&p->fcoe_rx_list.lock);
1722 set_current_state(TASK_RUNNING);
1723 if (kthread_should_stop())
1725 spin_lock_bh(&p->fcoe_rx_list.lock);
1727 spin_unlock_bh(&p->fcoe_rx_list.lock);
1728 fcoe_recv_frame(skb);
1734 * fcoe_dev_setup() - Setup the link change notification interface
1736 static void fcoe_dev_setup(void)
1738 register_netdevice_notifier(&fcoe_notifier);
1742 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1744 static void fcoe_dev_cleanup(void)
1746 unregister_netdevice_notifier(&fcoe_notifier);
1750 * fcoe_device_notification() - Handler for net device events
1751 * @notifier: The context of the notification
1752 * @event: The type of event
1753 * @ptr: The net device that the event was on
1755 * This function is called by the Ethernet driver in case of link change event.
1757 * Returns: 0 for success
1759 static int fcoe_device_notification(struct notifier_block *notifier,
1760 ulong event, void *ptr)
1762 struct fc_lport *lport = NULL;
1763 struct net_device *netdev = ptr;
1764 struct fcoe_interface *fcoe;
1765 struct fcoe_port *port;
1766 struct fcoe_dev_stats *stats;
1767 u32 link_possible = 1;
1771 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1772 if (fcoe->netdev == netdev) {
1773 lport = fcoe->ctlr.lp;
1784 case NETDEV_GOING_DOWN:
1790 case NETDEV_CHANGEMTU:
1791 if (netdev->features & NETIF_F_FCOE_MTU)
1793 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1794 sizeof(struct fcoe_crc_eof));
1795 if (mfs >= FC_MIN_MAX_FRAME)
1796 fc_set_mfs(lport, mfs);
1798 case NETDEV_REGISTER:
1800 case NETDEV_UNREGISTER:
1801 list_del(&fcoe->list);
1802 port = lport_priv(fcoe->ctlr.lp);
1803 queue_work(fcoe_wq, &port->destroy_work);
1806 case NETDEV_FEAT_CHANGE:
1807 fcoe_netdev_features_change(lport, netdev);
1810 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1811 "from netdev netlink\n", event);
1814 fcoe_link_speed_update(lport);
1816 if (link_possible && !fcoe_link_ok(lport))
1817 fcoe_ctlr_link_up(&fcoe->ctlr);
1818 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1819 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1820 stats->LinkFailureCount++;
1822 fcoe_clean_pending_queue(lport);
1829 * fcoe_disable() - Disables a FCoE interface
1830 * @netdev : The net_device object the Ethernet interface to create on
1832 * Called from fcoe transport.
1834 * Returns: 0 for success
1836 static int fcoe_disable(struct net_device *netdev)
1838 struct fcoe_interface *fcoe;
1841 mutex_lock(&fcoe_config_mutex);
1844 fcoe = fcoe_hostlist_lookup_port(netdev);
1848 fcoe_ctlr_link_down(&fcoe->ctlr);
1849 fcoe_clean_pending_queue(fcoe->ctlr.lp);
1853 mutex_unlock(&fcoe_config_mutex);
1858 * fcoe_enable() - Enables a FCoE interface
1859 * @netdev : The net_device object the Ethernet interface to create on
1861 * Called from fcoe transport.
1863 * Returns: 0 for success
1865 static int fcoe_enable(struct net_device *netdev)
1867 struct fcoe_interface *fcoe;
1870 mutex_lock(&fcoe_config_mutex);
1872 fcoe = fcoe_hostlist_lookup_port(netdev);
1877 else if (!fcoe_link_ok(fcoe->ctlr.lp))
1878 fcoe_ctlr_link_up(&fcoe->ctlr);
1880 mutex_unlock(&fcoe_config_mutex);
1885 * fcoe_destroy() - Destroy a FCoE interface
1886 * @netdev : The net_device object the Ethernet interface to create on
1888 * Called from fcoe transport
1890 * Returns: 0 for success
1892 static int fcoe_destroy(struct net_device *netdev)
1894 struct fcoe_interface *fcoe;
1895 struct fc_lport *lport;
1896 struct fcoe_port *port;
1899 mutex_lock(&fcoe_config_mutex);
1901 fcoe = fcoe_hostlist_lookup_port(netdev);
1906 lport = fcoe->ctlr.lp;
1907 port = lport_priv(lport);
1908 list_del(&fcoe->list);
1909 queue_work(fcoe_wq, &port->destroy_work);
1912 mutex_unlock(&fcoe_config_mutex);
1917 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1918 * @work: Handle to the FCoE port to be destroyed
1920 static void fcoe_destroy_work(struct work_struct *work)
1922 struct fcoe_port *port;
1923 struct fcoe_interface *fcoe;
1926 port = container_of(work, struct fcoe_port, destroy_work);
1927 mutex_lock(&fcoe_config_mutex);
1929 /* set if this is an NPIV port */
1930 npiv = port->lport->vport ? 1 : 0;
1933 fcoe_if_destroy(port->lport);
1935 /* Do not tear down the fcoe interface for NPIV port */
1938 fcoe_interface_cleanup(fcoe);
1942 mutex_unlock(&fcoe_config_mutex);
1946 * fcoe_match() - Check if the FCoE is supported on the given netdevice
1947 * @netdev : The net_device object the Ethernet interface to create on
1949 * Called from fcoe transport.
1951 * Returns: always returns true as this is the default FCoE transport,
1952 * i.e., support all netdevs.
1954 static bool fcoe_match(struct net_device *netdev)
1960 * fcoe_create() - Create a fcoe interface
1961 * @netdev : The net_device object the Ethernet interface to create on
1962 * @fip_mode: The FIP mode for this creation
1964 * Called from fcoe transport
1966 * Returns: 0 for success
1968 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
1971 struct fcoe_interface *fcoe;
1972 struct fc_lport *lport;
1974 mutex_lock(&fcoe_config_mutex);
1977 /* look for existing lport */
1978 if (fcoe_hostlist_lookup(netdev)) {
1983 fcoe = fcoe_interface_create(netdev, fip_mode);
1989 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
1990 if (IS_ERR(lport)) {
1991 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
1994 fcoe_interface_cleanup(fcoe);
1998 /* Make this the "master" N_Port */
1999 fcoe->ctlr.lp = lport;
2001 /* add to lports list */
2002 fcoe_hostlist_add(lport);
2004 /* start FIP Discovery and FLOGI */
2005 lport->boot_time = jiffies;
2006 fc_fabric_login(lport);
2007 if (!fcoe_link_ok(lport))
2008 fcoe_ctlr_link_up(&fcoe->ctlr);
2012 mutex_unlock(&fcoe_config_mutex);
2017 * fcoe_link_speed_update() - Update the supported and actual link speeds
2018 * @lport: The local port to update speeds for
2020 * Returns: 0 if the ethtool query was successful
2021 * -1 if the ethtool query failed
2023 int fcoe_link_speed_update(struct fc_lport *lport)
2025 struct net_device *netdev = fcoe_netdev(lport);
2026 struct ethtool_cmd ecmd;
2028 if (!dev_ethtool_get_settings(netdev, &ecmd)) {
2029 lport->link_supported_speeds &=
2030 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
2031 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
2032 SUPPORTED_1000baseT_Full))
2033 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
2034 if (ecmd.supported & SUPPORTED_10000baseT_Full)
2035 lport->link_supported_speeds |=
2036 FC_PORTSPEED_10GBIT;
2037 switch (ethtool_cmd_speed(&ecmd)) {
2039 lport->link_speed = FC_PORTSPEED_1GBIT;
2042 lport->link_speed = FC_PORTSPEED_10GBIT;
2051 * fcoe_link_ok() - Check if the link is OK for a local port
2052 * @lport: The local port to check link on
2054 * Returns: 0 if link is UP and OK, -1 if not
2057 int fcoe_link_ok(struct fc_lport *lport)
2059 struct net_device *netdev = fcoe_netdev(lport);
2061 if (netif_oper_up(netdev))
2067 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2068 * @lport: The local port whose skbs are to be cleared
2070 * Must be called with fcoe_create_mutex held to single-thread completion.
2072 * This flushes the pending skbs by adding a new skb to each queue and
2073 * waiting until they are all freed. This assures us that not only are
2074 * there no packets that will be handled by the lport, but also that any
2075 * threads already handling packet have returned.
2077 void fcoe_percpu_clean(struct fc_lport *lport)
2079 struct fcoe_percpu_s *pp;
2080 struct fcoe_rcv_info *fr;
2081 struct sk_buff_head *list;
2082 struct sk_buff *skb, *next;
2083 struct sk_buff *head;
2086 for_each_possible_cpu(cpu) {
2087 pp = &per_cpu(fcoe_percpu, cpu);
2088 spin_lock_bh(&pp->fcoe_rx_list.lock);
2089 list = &pp->fcoe_rx_list;
2091 for (skb = head; skb != (struct sk_buff *)list;
2094 fr = fcoe_dev_from_skb(skb);
2095 if (fr->fr_dev == lport) {
2096 __skb_unlink(skb, list);
2101 if (!pp->thread || !cpu_online(cpu)) {
2102 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2106 skb = dev_alloc_skb(0);
2108 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2111 skb->destructor = fcoe_percpu_flush_done;
2113 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2114 if (pp->fcoe_rx_list.qlen == 1)
2115 wake_up_process(pp->thread);
2116 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2118 wait_for_completion(&fcoe_flush_completion);
2123 * fcoe_reset() - Reset a local port
2124 * @shost: The SCSI host associated with the local port to be reset
2126 * Returns: Always 0 (return value required by FC transport template)
2128 int fcoe_reset(struct Scsi_Host *shost)
2130 struct fc_lport *lport = shost_priv(shost);
2131 struct fcoe_port *port = lport_priv(lport);
2132 struct fcoe_interface *fcoe = port->priv;
2134 fcoe_ctlr_link_down(&fcoe->ctlr);
2135 fcoe_clean_pending_queue(fcoe->ctlr.lp);
2136 if (!fcoe_link_ok(fcoe->ctlr.lp))
2137 fcoe_ctlr_link_up(&fcoe->ctlr);
2142 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2143 * @netdev: The net device used as a key
2145 * Locking: Must be called with the RNL mutex held.
2147 * Returns: NULL or the FCoE interface
2149 static struct fcoe_interface *
2150 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2152 struct fcoe_interface *fcoe;
2154 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2155 if (fcoe->netdev == netdev)
2162 * fcoe_hostlist_lookup() - Find the local port associated with a
2164 * @netdev: The netdevice used as a key
2166 * Locking: Must be called with the RTNL mutex held
2168 * Returns: NULL or the local port
2170 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2172 struct fcoe_interface *fcoe;
2174 fcoe = fcoe_hostlist_lookup_port(netdev);
2175 return (fcoe) ? fcoe->ctlr.lp : NULL;
2179 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2180 * port to the hostlist
2181 * @lport: The local port that identifies the FCoE interface to be added
2183 * Locking: must be called with the RTNL mutex held
2185 * Returns: 0 for success
2187 static int fcoe_hostlist_add(const struct fc_lport *lport)
2189 struct fcoe_interface *fcoe;
2190 struct fcoe_port *port;
2192 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2194 port = lport_priv(lport);
2196 list_add_tail(&fcoe->list, &fcoe_hostlist);
2202 static struct fcoe_transport fcoe_sw_transport = {
2203 .name = {FCOE_TRANSPORT_DEFAULT},
2205 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2206 .match = fcoe_match,
2207 .create = fcoe_create,
2208 .destroy = fcoe_destroy,
2209 .enable = fcoe_enable,
2210 .disable = fcoe_disable,
2214 * fcoe_init() - Initialize fcoe.ko
2216 * Returns: 0 on success, or a negative value on failure
2218 static int __init fcoe_init(void)
2220 struct fcoe_percpu_s *p;
2224 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2228 /* register as a fcoe transport */
2229 rc = fcoe_transport_attach(&fcoe_sw_transport);
2231 printk(KERN_ERR "failed to register an fcoe transport, check "
2232 "if libfcoe is loaded\n");
2236 mutex_lock(&fcoe_config_mutex);
2238 for_each_possible_cpu(cpu) {
2239 p = &per_cpu(fcoe_percpu, cpu);
2240 skb_queue_head_init(&p->fcoe_rx_list);
2243 for_each_online_cpu(cpu)
2244 fcoe_percpu_thread_create(cpu);
2246 /* Initialize per CPU interrupt thread */
2247 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2251 /* Setup link change notification */
2254 rc = fcoe_if_init();
2258 mutex_unlock(&fcoe_config_mutex);
2262 for_each_online_cpu(cpu) {
2263 fcoe_percpu_thread_destroy(cpu);
2265 mutex_unlock(&fcoe_config_mutex);
2266 destroy_workqueue(fcoe_wq);
2269 module_init(fcoe_init);
2272 * fcoe_exit() - Clean up fcoe.ko
2274 * Returns: 0 on success or a negative value on failure
2276 static void __exit fcoe_exit(void)
2278 struct fcoe_interface *fcoe, *tmp;
2279 struct fcoe_port *port;
2282 mutex_lock(&fcoe_config_mutex);
2286 /* releases the associated fcoe hosts */
2288 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2289 list_del(&fcoe->list);
2290 port = lport_priv(fcoe->ctlr.lp);
2291 queue_work(fcoe_wq, &port->destroy_work);
2295 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2297 for_each_online_cpu(cpu)
2298 fcoe_percpu_thread_destroy(cpu);
2300 mutex_unlock(&fcoe_config_mutex);
2303 * destroy_work's may be chained but destroy_workqueue()
2304 * can take care of them. Just kill the fcoe_wq.
2306 destroy_workqueue(fcoe_wq);
2309 * Detaching from the scsi transport must happen after all
2310 * destroys are done on the fcoe_wq. destroy_workqueue will
2311 * enusre the fcoe_wq is flushed.
2315 /* detach from fcoe transport */
2316 fcoe_transport_detach(&fcoe_sw_transport);
2318 module_exit(fcoe_exit);
2321 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2322 * @seq: active sequence in the FLOGI or FDISC exchange
2323 * @fp: response frame, or error encoded in a pointer (timeout)
2324 * @arg: pointer the the fcoe_ctlr structure
2326 * This handles MAC address management for FCoE, then passes control on to
2327 * the libfc FLOGI response handler.
2329 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2331 struct fcoe_ctlr *fip = arg;
2332 struct fc_exch *exch = fc_seq_exch(seq);
2333 struct fc_lport *lport = exch->lp;
2339 mac = fr_cb(fp)->granted_mac;
2340 if (is_zero_ether_addr(mac)) {
2342 if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
2347 fcoe_update_src_mac(lport, mac);
2349 fc_lport_flogi_resp(seq, fp, lport);
2353 * fcoe_logo_resp() - FCoE specific LOGO response handler
2354 * @seq: active sequence in the LOGO exchange
2355 * @fp: response frame, or error encoded in a pointer (timeout)
2356 * @arg: pointer the the fcoe_ctlr structure
2358 * This handles MAC address management for FCoE, then passes control on to
2359 * the libfc LOGO response handler.
2361 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2363 struct fc_lport *lport = arg;
2364 static u8 zero_mac[ETH_ALEN] = { 0 };
2367 fcoe_update_src_mac(lport, zero_mac);
2368 fc_lport_logo_resp(seq, fp, lport);
2372 * fcoe_elsct_send - FCoE specific ELS handler
2374 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2375 * using FCoE specific response handlers and passing the FIP controller as
2376 * the argument (the lport is still available from the exchange).
2378 * Most of the work here is just handed off to the libfc routine.
2380 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2381 struct fc_frame *fp, unsigned int op,
2382 void (*resp)(struct fc_seq *,
2385 void *arg, u32 timeout)
2387 struct fcoe_port *port = lport_priv(lport);
2388 struct fcoe_interface *fcoe = port->priv;
2389 struct fcoe_ctlr *fip = &fcoe->ctlr;
2390 struct fc_frame_header *fh = fc_frame_header_get(fp);
2395 if (lport->point_to_multipoint)
2397 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2400 /* only hook onto fabric logouts, not port logouts */
2401 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2403 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2406 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2410 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2411 * @vport: fc_vport object to create a new fc_host for
2412 * @disabled: start the new fc_host in a disabled state by default?
2414 * Returns: 0 for success
2416 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2418 struct Scsi_Host *shost = vport_to_shost(vport);
2419 struct fc_lport *n_port = shost_priv(shost);
2420 struct fcoe_port *port = lport_priv(n_port);
2421 struct fcoe_interface *fcoe = port->priv;
2422 struct net_device *netdev = fcoe->netdev;
2423 struct fc_lport *vn_port;
2427 rc = fcoe_validate_vport_create(vport);
2429 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2430 printk(KERN_ERR "fcoe: Failed to create vport, "
2431 "WWPN (0x%s) already exists\n",
2436 mutex_lock(&fcoe_config_mutex);
2437 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2438 mutex_unlock(&fcoe_config_mutex);
2440 if (IS_ERR(vn_port)) {
2441 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2447 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2449 vn_port->boot_time = jiffies;
2450 fc_fabric_login(vn_port);
2451 fc_vport_setlink(vn_port);
2457 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2458 * @vport: fc_vport object that is being destroyed
2460 * Returns: 0 for success
2462 static int fcoe_vport_destroy(struct fc_vport *vport)
2464 struct Scsi_Host *shost = vport_to_shost(vport);
2465 struct fc_lport *n_port = shost_priv(shost);
2466 struct fc_lport *vn_port = vport->dd_data;
2467 struct fcoe_port *port = lport_priv(vn_port);
2469 mutex_lock(&n_port->lp_mutex);
2470 list_del(&vn_port->list);
2471 mutex_unlock(&n_port->lp_mutex);
2472 queue_work(fcoe_wq, &port->destroy_work);
2477 * fcoe_vport_disable() - change vport state
2478 * @vport: vport to bring online/offline
2479 * @disable: should the vport be disabled?
2481 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2483 struct fc_lport *lport = vport->dd_data;
2486 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2487 fc_fabric_logoff(lport);
2489 lport->boot_time = jiffies;
2490 fc_fabric_login(lport);
2491 fc_vport_setlink(lport);
2498 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2499 * @vport: fc_vport with a new symbolic name string
2501 * After generating a new symbolic name string, a new RSPN_ID request is
2502 * sent to the name server. There is no response handler, so if it fails
2503 * for some reason it will not be retried.
2505 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2507 struct fc_lport *lport = vport->dd_data;
2508 struct fc_frame *fp;
2511 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2512 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2513 fcoe_netdev(lport)->name, vport->symbolic_name);
2515 if (lport->state != LPORT_ST_READY)
2518 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2519 fp = fc_frame_alloc(lport,
2520 sizeof(struct fc_ct_hdr) +
2521 sizeof(struct fc_ns_rspn) + len);
2524 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2525 NULL, NULL, 3 * lport->r_a_tov);
2529 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2530 * @lport: the local port
2531 * @fc_lesb: the link error status block
2533 static void fcoe_get_lesb(struct fc_lport *lport,
2534 struct fc_els_lesb *fc_lesb)
2537 u32 lfc, vlfc, mdac;
2538 struct fcoe_dev_stats *devst;
2539 struct fcoe_fc_els_lesb *lesb;
2540 struct rtnl_link_stats64 temp;
2541 struct net_device *netdev = fcoe_netdev(lport);
2546 lesb = (struct fcoe_fc_els_lesb *)fc_lesb;
2547 memset(lesb, 0, sizeof(*lesb));
2548 for_each_possible_cpu(cpu) {
2549 devst = per_cpu_ptr(lport->dev_stats, cpu);
2550 lfc += devst->LinkFailureCount;
2551 vlfc += devst->VLinkFailureCount;
2552 mdac += devst->MissDiscAdvCount;
2554 lesb->lesb_link_fail = htonl(lfc);
2555 lesb->lesb_vlink_fail = htonl(vlfc);
2556 lesb->lesb_miss_fka = htonl(mdac);
2557 lesb->lesb_fcs_error = htonl(dev_get_stats(netdev, &temp)->rx_crc_errors);
2561 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2562 * @lport: the local port
2563 * @port_id: the port ID
2564 * @fp: the received frame, if any, that caused the port_id to be set.
2566 * This routine handles the case where we received a FLOGI and are
2567 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2568 * so it can set the non-mapped mode and gateway address.
2570 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2572 static void fcoe_set_port_id(struct fc_lport *lport,
2573 u32 port_id, struct fc_frame *fp)
2575 struct fcoe_port *port = lport_priv(lport);
2576 struct fcoe_interface *fcoe = port->priv;
2578 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2579 fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp);